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Commit | Line | Data |
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1 | What has changed in GDB? | |
2 | (Organized release by release) | |
3 | ||
4 | *** Changes since GDB 8.3 | |
5 | ||
6 | * 'thread-exited' event is now available in the annotations interface. | |
7 | ||
8 | * New built-in convenience variables $_gdb_major and $_gdb_minor | |
9 | provide the GDB version. They are handy for conditionally using | |
10 | features available only in or since specific GDB versions, in | |
11 | scripts that should work error-free with many different versions, | |
12 | such as in system-wide init files. | |
13 | ||
14 | * New built-in convenience functions $_gdb_setting, $_gdb_setting_str, | |
15 | $_gdb_maint_setting and $_gdb_maint_setting_str provide access to values | |
16 | of the GDB settings and the GDB maintenance settings. They are handy | |
17 | for changing the logic of user defined commands depending on the | |
18 | current GDB settings. | |
19 | ||
20 | * GDB now supports Thread Local Storage (TLS) variables on several | |
21 | FreeBSD architectures (amd64, i386, powerpc, riscv). Other | |
22 | architectures require kernel changes. TLS is not yet supported for | |
23 | amd64 and i386 process core dumps. | |
24 | ||
25 | * Support for Pointer Authentication (PAC) on AArch64 Linux. Return | |
26 | addresses that required unmasking are shown in the backtrace with the | |
27 | postfix [PAC]. | |
28 | ||
29 | * Two new convenience functions $_cimag and $_creal that extract the | |
30 | imaginary and real parts respectively from complex numbers. | |
31 | ||
32 | * New built-in convenience variables $_shell_exitcode and $_shell_exitsignal | |
33 | provide the exitcode or exit status of the shell commands launched by | |
34 | GDB commands such as "shell", "pipe" and "make". | |
35 | ||
36 | * The RX port now supports XML target descriptions. | |
37 | ||
38 | * GDB now shows the Ada task names at more places, e.g. in task switching | |
39 | messages. | |
40 | ||
41 | * GDB can now be compiled with Python 3 on Windows. | |
42 | ||
43 | * New convenience variable $_ada_exception holds the address of the | |
44 | Ada exception being thrown. This is set by Ada-related catchpoints. | |
45 | ||
46 | * GDB can now place breakpoints on nested functions and subroutines in | |
47 | Fortran code. The '::' operator can be used between parent and | |
48 | child scopes when placing breakpoints, for example: | |
49 | ||
50 | (gdb) break outer_function::inner_function | |
51 | ||
52 | The 'outer_function::' prefix is only needed if 'inner_function' is | |
53 | not visible in the current scope. | |
54 | ||
55 | * In addition to the system-wide gdbinit file, if configured with | |
56 | --with-system-gdbinit-dir, GDB will now also load files in that directory | |
57 | as system gdbinit files, unless the -nx or -n flag is provided. Files | |
58 | with extensions .gdb, .py and .scm are supported as long as GDB was | |
59 | compiled with support for that language. | |
60 | ||
61 | * Python API | |
62 | ||
63 | ** The gdb.Value type has a new method 'format_string' which returns a | |
64 | string representing the value. The formatting is controlled by the | |
65 | optional keyword arguments: 'raw', 'pretty_arrays', 'pretty_structs', | |
66 | 'array_indexes', 'symbols', 'unions', 'deref_refs', 'actual_objects', | |
67 | 'static_members', 'max_elements', 'repeat_threshold', and 'format'. | |
68 | ||
69 | ** gdb.Type has a new property 'objfile' which returns the objfile the | |
70 | type was defined in. | |
71 | ||
72 | ** The frame information printed by the python frame filtering code | |
73 | is now consistent with what the 'backtrace' command prints when | |
74 | there are no filters, or when the 'backtrace' '-no-filters' option | |
75 | is given. | |
76 | ||
77 | ** The new function gdb.lookup_static_symbol can be used to look up | |
78 | symbols with static linkage. | |
79 | ||
80 | ** gdb.Objfile has new methods 'lookup_global_symbol' and | |
81 | 'lookup_static_symbol' to lookup a symbol from this objfile only. | |
82 | ||
83 | ** gdb.Block now supports the dictionary syntax for accessing symbols in | |
84 | this block (e.g. block['local_variable']). | |
85 | ||
86 | * New commands | |
87 | ||
88 | | [COMMAND] | SHELL_COMMAND | |
89 | | -d DELIM COMMAND DELIM SHELL_COMMAND | |
90 | pipe [COMMAND] | SHELL_COMMAND | |
91 | pipe -d DELIM COMMAND DELIM SHELL_COMMAND | |
92 | Executes COMMAND and sends its output to SHELL_COMMAND. | |
93 | With no COMMAND, repeat the last executed command | |
94 | and send its output to SHELL_COMMAND. | |
95 | ||
96 | with SETTING [VALUE] [-- COMMAND] | |
97 | w SETTING [VALUE] [-- COMMAND] | |
98 | Temporarily set SETTING, run COMMAND, and restore SETTING. | |
99 | Usage: with SETTING -- COMMAND | |
100 | With no COMMAND, repeats the last executed command. | |
101 | SETTING is any GDB setting you can change with the "set" | |
102 | subcommands. For example, 'with language c -- print someobj' | |
103 | temporarily switches to the C language in order to print someobj. | |
104 | Settings can be combined: 'w lang c -- w print elements unlimited -- | |
105 | usercmd' switches to the C language and runs usercmd with no limit | |
106 | of array elements to print. | |
107 | ||
108 | maint with SETTING [VALUE] [-- COMMAND] | |
109 | Like "with", but works with "maintenance set" settings. | |
110 | ||
111 | set may-call-functions [on|off] | |
112 | show may-call-functions | |
113 | This controls whether GDB will attempt to call functions in | |
114 | the program, such as with expressions in the print command. It | |
115 | defaults to on. Calling functions in the program being debugged | |
116 | can have undesired side effects. It is now possible to forbid | |
117 | such function calls. If function calls are forbidden, GDB will throw | |
118 | an error when a command (such as print expression) calls a function | |
119 | in the program. | |
120 | ||
121 | set print finish [on|off] | |
122 | show print finish | |
123 | This controls whether the `finish' command will display the value | |
124 | that is returned by the current function. When `off', the value is | |
125 | still entered into the value history, but it is not printed. The | |
126 | default is `on'. | |
127 | ||
128 | set print max-depth | |
129 | show print max-depth | |
130 | Allows deeply nested structures to be simplified when printing by | |
131 | replacing deeply nested parts (beyond the max-depth) with ellipses. | |
132 | The default max-depth is 20, but this can be set to unlimited to get | |
133 | the old behavior back. | |
134 | ||
135 | set logging debugredirect [on|off] | |
136 | By default, GDB debug output will go to both the terminal and the logfile. | |
137 | Set if you want debug output to go only to the log file. | |
138 | ||
139 | set style title foreground COLOR | |
140 | set style title background COLOR | |
141 | set style title intensity VALUE | |
142 | Control the styling of titles. | |
143 | ||
144 | set style highlight foreground COLOR | |
145 | set style highlight background COLOR | |
146 | set style highlight intensity VALUE | |
147 | Control the styling of highlightings. | |
148 | ||
149 | maint set test-settings KIND | |
150 | maint show test-settings KIND | |
151 | A set of commands used by the testsuite for exercising the settings | |
152 | infrastructure. | |
153 | ||
154 | set print frame-info [short-location|location|location-and-address | |
155 | |source-and-location|source-line|auto] | |
156 | show print frame-info | |
157 | This controls what frame information is printed by the commands printing | |
158 | a frame. This setting will e.g. influence the behaviour of 'backtrace', | |
159 | 'frame', 'stepi'. The python frame filtering also respect this setting. | |
160 | The 'backtrace' '-frame-info' option can override this global setting. | |
161 | ||
162 | * Changed commands | |
163 | ||
164 | help | |
165 | The "help" command uses the title style to enhance the | |
166 | readibility of its output by styling the classes and | |
167 | command names. | |
168 | ||
169 | apropos [-v] REGEXP | |
170 | Similarly to "help", the "apropos" command also uses the | |
171 | title style for the command names. "apropos" accepts now | |
172 | a flag "-v" (verbose) to show the full documentation | |
173 | of matching commands and to use the highlight style to mark | |
174 | the documentation parts matching REGEXP. | |
175 | ||
176 | printf | |
177 | eval | |
178 | The GDB printf and eval commands can now print C-style and Ada-style | |
179 | string convenience variables without calling functions in the program. | |
180 | This allows to do formatted printing of strings without having | |
181 | a running inferior, or when debugging a core dump. | |
182 | ||
183 | info sources [-dirname | -basename] [--] [REGEXP] | |
184 | This command has now optional arguments to only print the files | |
185 | whose names match REGEXP. The arguments -dirname and -basename | |
186 | allow to restrict matching respectively to the dirname and basename | |
187 | parts of the files. | |
188 | ||
189 | show style | |
190 | The "show style" and its subcommands are now styling | |
191 | a style name in their output using its own style, to help | |
192 | the user visualize the different styles. | |
193 | ||
194 | set print frame-arguments | |
195 | The new value 'presence' indicates to only indicate the presence of | |
196 | arguments using ..., instead of printing argument names and values. | |
197 | ||
198 | set print raw-frame-arguments | |
199 | show print raw-frame-arguments | |
200 | ||
201 | These commands replace the similarly-named "set/show print raw | |
202 | frame-arguments" commands (now with a dash instead of a space). The | |
203 | old commands are now deprecated and may be removed in a future | |
204 | release. | |
205 | ||
206 | maint test-options require-delimiter | |
207 | maint test-options unknown-is-error | |
208 | maint test-options unknown-is-operand | |
209 | maint show test-options-completion-result | |
210 | Commands used by the testsuite to validate the command options | |
211 | framework. | |
212 | ||
213 | focus, winheight, +, -, >, < | |
214 | These commands are now case-sensitive. | |
215 | ||
216 | * New command options, command completion | |
217 | ||
218 | GDB now has a standard infrastructure to support dash-style command | |
219 | options ('-OPT'). One benefit is that commands that use it can | |
220 | easily support completion of command line arguments. Try "CMD | |
221 | -[TAB]" or "help CMD" to find options supported by a command. Over | |
222 | time, we intend to migrate most commands to this infrastructure. A | |
223 | number of commands got support for new command options in this | |
224 | release: | |
225 | ||
226 | ** The "print" and "compile print" commands now support a number of | |
227 | options that allow overriding relevant global print settings as | |
228 | set by "set print" subcommands: | |
229 | ||
230 | -address [on|off] | |
231 | -array [on|off] | |
232 | -array-indexes [on|off] | |
233 | -elements NUMBER|unlimited | |
234 | -null-stop [on|off] | |
235 | -object [on|off] | |
236 | -pretty [on|off] | |
237 | -repeats NUMBER|unlimited | |
238 | -static-members [on|off] | |
239 | -symbol [on|off] | |
240 | -union [on|off] | |
241 | -vtbl [on|off] | |
242 | ||
243 | Note that because the "print"/"compile print" commands accept | |
244 | arbitrary expressions which may look like options (including | |
245 | abbreviations), if you specify any command option, then you must | |
246 | use a double dash ("--") to mark the end of argument processing. | |
247 | ||
248 | ** The "backtrace" command now supports a number of options that | |
249 | allow overriding relevant global print settings as set by "set | |
250 | backtrace" and "set print" subcommands: | |
251 | ||
252 | -entry-values no|only|preferred|if-needed|both|compact|default | |
253 | -frame-arguments all|scalars|none | |
254 | -raw-frame-arguments [on|off] | |
255 | -frame-info auto|source-line|location|source-and-location | |
256 | |location-and-address|short-location | |
257 | -past-main [on|off] | |
258 | -past-entry [on|off] | |
259 | ||
260 | In addition, the full/no-filters/hide qualifiers are now also | |
261 | exposed as command options too: | |
262 | ||
263 | -full | |
264 | -no-filters | |
265 | -hide | |
266 | ||
267 | ** The "frame apply", "tfaas" and "faas" commands similarly now | |
268 | support the following options: | |
269 | ||
270 | -past-main [on|off] | |
271 | -past-entry [on|off] | |
272 | ||
273 | ** The new "info sources" options -dirname and -basename options | |
274 | are using the standard '-OPT' infrastructure. | |
275 | ||
276 | All options above can also be abbreviated. The argument of boolean | |
277 | (on/off) options can be 0/1 too, and also the argument is assumed | |
278 | "on" if omitted. This allows writing compact command invocations, | |
279 | like for example: | |
280 | ||
281 | (gdb) p -r -p -o 0 -- *myptr | |
282 | ||
283 | The above is equivalent to: | |
284 | ||
285 | (gdb) print -raw -pretty -object off -- *myptr | |
286 | ||
287 | ** The "info types" command now supports the '-q' flag to disable | |
288 | printing of some header information in a similar fashion to "info | |
289 | variables" and "info functions". | |
290 | ||
291 | ** The "info variables", "info functions", and "whereis" commands | |
292 | now take a '-n' flag that excludes non-debug symbols (symbols | |
293 | from the symbol table, not from the debug info such as DWARF) | |
294 | from the results. | |
295 | ||
296 | * Completion improvements | |
297 | ||
298 | ** GDB can now complete the options of the "thread apply all" and | |
299 | "taas" commands, and their "-ascending" option can now be | |
300 | abbreviated. | |
301 | ||
302 | ** GDB can now complete the options of the "info threads", "info | |
303 | functions", "info variables", "info locals", and "info args" | |
304 | commands. | |
305 | ||
306 | ** GDB can now complete the options of the "compile file" and | |
307 | "compile code" commands. The "compile file" command now | |
308 | completes on filenames. | |
309 | ||
310 | ** GDB can now complete the backtrace command's | |
311 | "full/no-filters/hide" qualifiers. | |
312 | ||
313 | * In settings, you can now abbreviate "unlimited". | |
314 | ||
315 | E.g., "set print elements u" is now equivalent to "set print | |
316 | elements unlimited". | |
317 | ||
318 | * New MI commands | |
319 | ||
320 | -complete | |
321 | This lists all the possible completions for the rest of the line, if it | |
322 | were to be given as a command itself. This is intended for use by MI | |
323 | frontends in cases when separate CLI and MI channels cannot be used. | |
324 | ||
325 | -catch-throw, -catch-rethrow, and -catch-catch | |
326 | These can be used to catch C++ exceptions in a similar fashion to | |
327 | the CLI commands 'catch throw', 'catch rethrow', and 'catch catch'. | |
328 | ||
329 | * Other MI changes | |
330 | ||
331 | ** The default version of the MI interpreter is now 3 (-i=mi3). | |
332 | ||
333 | ** The output of information about multi-location breakpoints (which is | |
334 | syntactically incorrect in MI 2) has changed in MI 3. This affects | |
335 | the following commands and events: | |
336 | ||
337 | - -break-insert | |
338 | - -break-info | |
339 | - =breakpoint-created | |
340 | - =breakpoint-modified | |
341 | ||
342 | The -fix-multi-location-breakpoint-output command can be used to enable | |
343 | this behavior with previous MI versions. | |
344 | ||
345 | ** Backtraces and frames include a new optional field addr_flags which is | |
346 | given after the addr field. On AArch64 this contains PAC if the address | |
347 | has been masked in the frame. On all other targets the field is not | |
348 | present. | |
349 | ||
350 | * Testsuite | |
351 | ||
352 | The testsuite now creates the files gdb.cmd (containing the arguments | |
353 | used to launch GDB) and gdb.in (containing all the commands sent to | |
354 | GDB) in the output directory for each test script. Multiple invocations | |
355 | are appended with .1, .2, .3 etc. | |
356 | ||
357 | * Building GDB and GDBserver now requires GNU make >= 3.82. | |
358 | ||
359 | Using another implementation of the make program or an earlier version of | |
360 | GNU make to build GDB or GDBserver is not supported. | |
361 | ||
362 | * Building GDB now requires GNU readline >= 7.0. | |
363 | ||
364 | GDB now bundles GNU readline 8.0, but if you choose to use | |
365 | --with-system-readline, only readline >= 7.0 can be used. | |
366 | ||
367 | * The TUI SingleKey keymap is now named "SingleKey". This can be used | |
368 | from .inputrc to bind keys in this keymap. This feature is only | |
369 | available when gdb is built against GNU readline 8.0 or later. | |
370 | ||
371 | * Removed targets and native configurations | |
372 | ||
373 | GDB no longer supports debugging the Cell Broadband Engine. This includes | |
374 | both debugging standalone Cell/B.E. SPU applications and integrated debugging | |
375 | of Cell/B.E. applications that use both the PPU and SPU architectures. | |
376 | ||
377 | * New Simulators | |
378 | ||
379 | TI PRU pru-*-elf | |
380 | ||
381 | *** Changes in GDB 8.3 | |
382 | ||
383 | * GDB and GDBserver now support access to additional registers on | |
384 | PowerPC GNU/Linux targets: PPR, DSCR, TAR, EBB/PMU registers, and | |
385 | HTM registers. | |
386 | ||
387 | * GDB now has experimental support for the compilation and injection of | |
388 | C++ source code into the inferior. This beta release does not include | |
389 | support for several language features, such as templates, constructors, | |
390 | and operators. | |
391 | ||
392 | This feature requires GCC 7.1 or higher built with libcp1.so | |
393 | (the C++ plug-in). | |
394 | ||
395 | * GDB and GDBserver now support IPv6 connections. IPv6 addresses | |
396 | can be passed using the '[ADDRESS]:PORT' notation, or the regular | |
397 | 'ADDRESS:PORT' method. | |
398 | ||
399 | * DWARF index cache: GDB can now automatically save indices of DWARF | |
400 | symbols on disk to speed up further loading of the same binaries. | |
401 | ||
402 | * Ada task switching is now supported on aarch64-elf targets when | |
403 | debugging a program using the Ravenscar Profile. For more information, | |
404 | see the "Tasking Support when using the Ravenscar Profile" section | |
405 | in the GDB user manual. | |
406 | ||
407 | * GDB in batch mode now exits with status 1 if the last command to be | |
408 | executed failed. | |
409 | ||
410 | * The RISC-V target now supports target descriptions. | |
411 | ||
412 | * System call catchpoints now support system call aliases on FreeBSD. | |
413 | When the ABI of a system call changes in FreeBSD, this is | |
414 | implemented by leaving a compatibility system call using the old ABI | |
415 | at the existing number and allocating a new system call number for | |
416 | the new ABI. For example, FreeBSD 12 altered the layout of 'struct | |
417 | kevent' used by the 'kevent' system call. As a result, FreeBSD 12 | |
418 | kernels ship with both 'kevent' and 'freebsd11_kevent' system calls. | |
419 | The 'freebsd11_kevent' system call is assigned an alias of 'kevent' | |
420 | so that a system call catchpoint for the 'kevent' system call will | |
421 | catch invocations of both the 'kevent' and 'freebsd11_kevent' | |
422 | binaries. This ensures that 'kevent' system calls are caught for | |
423 | binaries using either the old or new ABIs. | |
424 | ||
425 | * Terminal styling is now available for the CLI and the TUI. GNU | |
426 | Source Highlight can additionally be used to provide styling of | |
427 | source code snippets. See the "set style" commands, below, for more | |
428 | information. | |
429 | ||
430 | * Removed support for old demangling styles arm, edg, gnu, hp and | |
431 | lucid. | |
432 | ||
433 | * New commands | |
434 | ||
435 | set debug compile-cplus-types | |
436 | show debug compile-cplus-types | |
437 | Control the display of debug output about type conversion in the | |
438 | C++ compile feature. Commands have no effect while compiliong | |
439 | for other languages. | |
440 | ||
441 | set debug skip | |
442 | show debug skip | |
443 | Control whether debug output about files/functions skipping is | |
444 | displayed. | |
445 | ||
446 | frame apply [all | COUNT | -COUNT | level LEVEL...] [FLAG]... COMMAND | |
447 | Apply a command to some frames. | |
448 | FLAG arguments allow to control what output to produce and how to handle | |
449 | errors raised when applying COMMAND to a frame. | |
450 | ||
451 | taas COMMAND | |
452 | Apply a command to all threads (ignoring errors and empty output). | |
453 | Shortcut for 'thread apply all -s COMMAND'. | |
454 | ||
455 | faas COMMAND | |
456 | Apply a command to all frames (ignoring errors and empty output). | |
457 | Shortcut for 'frame apply all -s COMMAND'. | |
458 | ||
459 | tfaas COMMAND | |
460 | Apply a command to all frames of all threads (ignoring errors and empty | |
461 | output). | |
462 | Shortcut for 'thread apply all -s frame apply all -s COMMAND'. | |
463 | ||
464 | maint set dwarf unwinders (on|off) | |
465 | maint show dwarf unwinders | |
466 | Control whether DWARF unwinders can be used. | |
467 | ||
468 | info proc files | |
469 | Display a list of open files for a process. | |
470 | ||
471 | * Changed commands | |
472 | ||
473 | Changes to the "frame", "select-frame", and "info frame" CLI commands. | |
474 | These commands all now take a frame specification which | |
475 | is either a frame level, or one of the keywords 'level', 'address', | |
476 | 'function', or 'view' followed by a parameter. Selecting a frame by | |
477 | address, or viewing a frame outside the current backtrace now | |
478 | requires the use of a keyword. Selecting a frame by level is | |
479 | unchanged. The MI comment "-stack-select-frame" is unchanged. | |
480 | ||
481 | target remote FILENAME | |
482 | target extended-remote FILENAME | |
483 | If FILENAME is a Unix domain socket, GDB will attempt to connect | |
484 | to this socket instead of opening FILENAME as a character device. | |
485 | ||
486 | info args [-q] [-t TYPEREGEXP] [NAMEREGEXP] | |
487 | info functions [-q] [-t TYPEREGEXP] [NAMEREGEXP] | |
488 | info locals [-q] [-t TYPEREGEXP] [NAMEREGEXP] | |
489 | info variables [-q] [-t TYPEREGEXP] [NAMEREGEXP] | |
490 | These commands can now print only the searched entities | |
491 | matching the provided regexp(s), giving a condition | |
492 | on the entity names or entity types. The flag -q disables | |
493 | printing headers or informations messages. | |
494 | ||
495 | info functions | |
496 | info types | |
497 | info variables | |
498 | rbreak | |
499 | These commands now determine the syntax for the shown entities | |
500 | according to the language chosen by `set language'. In particular, | |
501 | `set language auto' means to automatically choose the language of | |
502 | the shown entities. | |
503 | ||
504 | thread apply [all | COUNT | -COUNT] [FLAG]... COMMAND | |
505 | The 'thread apply' command accepts new FLAG arguments. | |
506 | FLAG arguments allow to control what output to produce and how to handle | |
507 | errors raised when applying COMMAND to a thread. | |
508 | ||
509 | set tui tab-width NCHARS | |
510 | show tui tab-width NCHARS | |
511 | "set tui tab-width" replaces the "tabset" command, which has been deprecated. | |
512 | ||
513 | set style enabled [on|off] | |
514 | show style enabled | |
515 | Enable or disable terminal styling. Styling is enabled by default | |
516 | on most hosts, but disabled by default when in batch mode. | |
517 | ||
518 | set style sources [on|off] | |
519 | show style sources | |
520 | Enable or disable source code styling. Source code styling is | |
521 | enabled by default, but only takes effect if styling in general is | |
522 | enabled, and if GDB was linked with GNU Source Highlight. | |
523 | ||
524 | set style filename foreground COLOR | |
525 | set style filename background COLOR | |
526 | set style filename intensity VALUE | |
527 | Control the styling of file names. | |
528 | ||
529 | set style function foreground COLOR | |
530 | set style function background COLOR | |
531 | set style function intensity VALUE | |
532 | Control the styling of function names. | |
533 | ||
534 | set style variable foreground COLOR | |
535 | set style variable background COLOR | |
536 | set style variable intensity VALUE | |
537 | Control the styling of variable names. | |
538 | ||
539 | set style address foreground COLOR | |
540 | set style address background COLOR | |
541 | set style address intensity VALUE | |
542 | Control the styling of addresses. | |
543 | ||
544 | * MI changes | |
545 | ||
546 | ** The '-data-disassemble' MI command now accepts an '-a' option to | |
547 | disassemble the whole function surrounding the given program | |
548 | counter value or function name. Support for this feature can be | |
549 | verified by using the "-list-features" command, which should | |
550 | contain "data-disassemble-a-option". | |
551 | ||
552 | ** Command responses and notifications that include a frame now include | |
553 | the frame's architecture in a new "arch" attribute. | |
554 | ||
555 | * New native configurations | |
556 | ||
557 | GNU/Linux/RISC-V riscv*-*-linux* | |
558 | FreeBSD/riscv riscv*-*-freebsd* | |
559 | ||
560 | * New targets | |
561 | ||
562 | GNU/Linux/RISC-V riscv*-*-linux* | |
563 | CSKY ELF csky*-*-elf | |
564 | CSKY GNU/LINUX csky*-*-linux | |
565 | FreeBSD/riscv riscv*-*-freebsd* | |
566 | NXP S12Z s12z-*-elf | |
567 | GNU/Linux/OpenRISC or1k*-*-linux* | |
568 | ||
569 | * Removed targets | |
570 | ||
571 | GDB no longer supports native debugging on versions of MS-Windows | |
572 | before Windows XP. | |
573 | ||
574 | * Python API | |
575 | ||
576 | ** GDB no longer supports Python versions less than 2.6. | |
577 | ||
578 | ** The gdb.Inferior type has a new 'progspace' property, which is the program | |
579 | space associated to that inferior. | |
580 | ||
581 | ** The gdb.Progspace type has a new 'objfiles' method, which returns the list | |
582 | of objfiles associated to that program space. | |
583 | ||
584 | ** gdb.SYMBOL_LOC_COMMON_BLOCK, gdb.SYMBOL_MODULE_DOMAIN, and | |
585 | gdb.SYMBOL_COMMON_BLOCK_DOMAIN were added to reflect changes to | |
586 | the gdb core. | |
587 | ||
588 | ** gdb.SYMBOL_VARIABLES_DOMAIN, gdb.SYMBOL_FUNCTIONS_DOMAIN, and | |
589 | gdb.SYMBOL_TYPES_DOMAIN are now deprecated. These were never | |
590 | correct and did not work properly. | |
591 | ||
592 | ** The gdb.Value type has a new constructor, which is used to construct a | |
593 | gdb.Value from a Python buffer object and a gdb.Type. | |
594 | ||
595 | * Configure changes | |
596 | ||
597 | --enable-ubsan | |
598 | ||
599 | Enable or disable the undefined behavior sanitizer. This is | |
600 | disabled by default, but passing --enable-ubsan=yes or | |
601 | --enable-ubsan=auto to configure will enable it. Enabling this can | |
602 | cause a performance penalty. The undefined behavior sanitizer was | |
603 | first introduced in GCC 4.9. | |
604 | ||
605 | *** Changes in GDB 8.2 | |
606 | ||
607 | * The 'set disassembler-options' command now supports specifying options | |
608 | for the MIPS target. | |
609 | ||
610 | * The 'symbol-file' command now accepts an '-o' option to add a relative | |
611 | offset to all sections. | |
612 | ||
613 | * Similarly, the 'add-symbol-file' command also accepts an '-o' option to add | |
614 | a relative offset to all sections, but it allows to override the load | |
615 | address of individual sections using '-s'. | |
616 | ||
617 | * The 'add-symbol-file' command no longer requires the second argument | |
618 | (address of the text section). | |
619 | ||
620 | * The endianness used with the 'set endian auto' mode in the absence of | |
621 | an executable selected for debugging is now the last endianness chosen | |
622 | either by one of the 'set endian big' and 'set endian little' commands | |
623 | or by inferring from the last executable used, rather than the startup | |
624 | default. | |
625 | ||
626 | * The pager now allows a "c" response, meaning to disable the pager | |
627 | for the rest of the current command. | |
628 | ||
629 | * The commands 'info variables/functions/types' now show the source line | |
630 | numbers of symbol definitions when available. | |
631 | ||
632 | * 'info proc' now works on running processes on FreeBSD systems and core | |
633 | files created on FreeBSD systems. | |
634 | ||
635 | * C expressions can now use _Alignof, and C++ expressions can now use | |
636 | alignof. | |
637 | ||
638 | * Support for SVE on AArch64 Linux. Note that GDB does not detect changes to | |
639 | the vector length while the process is running. | |
640 | ||
641 | * New commands | |
642 | ||
643 | set debug fbsd-nat | |
644 | show debug fbsd-nat | |
645 | Control display of debugging info regarding the FreeBSD native target. | |
646 | ||
647 | set|show varsize-limit | |
648 | This new setting allows the user to control the maximum size of Ada | |
649 | objects being printed when those objects have a variable type, | |
650 | instead of that maximum size being hardcoded to 65536 bytes. | |
651 | ||
652 | set|show record btrace cpu | |
653 | Controls the processor to be used for enabling errata workarounds for | |
654 | branch trace decode. | |
655 | ||
656 | maint check libthread-db | |
657 | Run integrity checks on the current inferior's thread debugging | |
658 | library | |
659 | ||
660 | maint set check-libthread-db (on|off) | |
661 | maint show check-libthread-db | |
662 | Control whether to run integrity checks on inferior specific thread | |
663 | debugging libraries as they are loaded. The default is not to | |
664 | perform such checks. | |
665 | ||
666 | * Python API | |
667 | ||
668 | ** Type alignment is now exposed via the "align" attribute of a gdb.Type. | |
669 | ||
670 | ** The commands attached to a breakpoint can be set by assigning to | |
671 | the breakpoint's "commands" field. | |
672 | ||
673 | ** gdb.execute can now execute multi-line gdb commands. | |
674 | ||
675 | ** The new functions gdb.convenience_variable and | |
676 | gdb.set_convenience_variable can be used to get and set the value | |
677 | of convenience variables. | |
678 | ||
679 | ** A gdb.Parameter will no longer print the "set" help text on an | |
680 | ordinary "set"; instead by default a "set" will be silent unless | |
681 | the get_set_string method returns a non-empty string. | |
682 | ||
683 | * New targets | |
684 | ||
685 | RiscV ELF riscv*-*-elf | |
686 | ||
687 | * Removed targets and native configurations | |
688 | ||
689 | m88k running OpenBSD m88*-*-openbsd* | |
690 | SH-5/SH64 ELF sh64-*-elf*, SH-5/SH64 support in sh* | |
691 | SH-5/SH64 running GNU/Linux SH-5/SH64 support in sh*-*-linux* | |
692 | SH-5/SH64 running OpenBSD SH-5/SH64 support in sh*-*-openbsd* | |
693 | ||
694 | * Aarch64/Linux hardware watchpoints improvements | |
695 | ||
696 | Hardware watchpoints on unaligned addresses are now properly | |
697 | supported when running Linux kernel 4.10 or higher: read and access | |
698 | watchpoints are no longer spuriously missed, and all watchpoints | |
699 | lengths between 1 and 8 bytes are supported. On older kernels, | |
700 | watchpoints set on unaligned addresses are no longer missed, with | |
701 | the tradeoff that there is a possibility of false hits being | |
702 | reported. | |
703 | ||
704 | * Configure changes | |
705 | ||
706 | --enable-codesign=CERT | |
707 | This can be used to invoke "codesign -s CERT" after building gdb. | |
708 | This option is useful on macOS, where code signing is required for | |
709 | gdb to work properly. | |
710 | ||
711 | --disable-gdbcli has been removed | |
712 | This is now silently accepted, but does nothing. | |
713 | ||
714 | *** Changes in GDB 8.1 | |
715 | ||
716 | * GDB now supports dynamically creating arbitrary register groups specified | |
717 | in XML target descriptions. This allows for finer grain grouping of | |
718 | registers on systems with a large amount of registers. | |
719 | ||
720 | * The 'ptype' command now accepts a '/o' flag, which prints the | |
721 | offsets and sizes of fields in a struct, like the pahole(1) tool. | |
722 | ||
723 | * New "--readnever" command line option instructs GDB to not read each | |
724 | symbol file's symbolic debug information. This makes startup faster | |
725 | but at the expense of not being able to perform symbolic debugging. | |
726 | This option is intended for use cases where symbolic debugging will | |
727 | not be used, e.g., when you only need to dump the debuggee's core. | |
728 | ||
729 | * GDB now uses the GNU MPFR library, if available, to emulate target | |
730 | floating-point arithmetic during expression evaluation when the target | |
731 | uses different floating-point formats than the host. At least version | |
732 | 3.1 of GNU MPFR is required. | |
733 | ||
734 | * GDB now supports access to the guarded-storage-control registers and the | |
735 | software-based guarded-storage broadcast control registers on IBM z14. | |
736 | ||
737 | * On Unix systems, GDB now supports transmitting environment variables | |
738 | that are to be set or unset to GDBserver. These variables will | |
739 | affect the environment to be passed to the remote inferior. | |
740 | ||
741 | To inform GDB of environment variables that are to be transmitted to | |
742 | GDBserver, use the "set environment" command. Only user set | |
743 | environment variables are sent to GDBserver. | |
744 | ||
745 | To inform GDB of environment variables that are to be unset before | |
746 | the remote inferior is started by the GDBserver, use the "unset | |
747 | environment" command. | |
748 | ||
749 | * Completion improvements | |
750 | ||
751 | ** GDB can now complete function parameters in linespecs and | |
752 | explicit locations without quoting. When setting breakpoints, | |
753 | quoting around functions names to help with TAB-completion is | |
754 | generally no longer necessary. For example, this now completes | |
755 | correctly: | |
756 | ||
757 | (gdb) b function(in[TAB] | |
758 | (gdb) b function(int) | |
759 | ||
760 | Related, GDB is no longer confused with completing functions in | |
761 | C++ anonymous namespaces: | |
762 | ||
763 | (gdb) b (anon[TAB] | |
764 | (gdb) b (anonymous namespace)::[TAB][TAB] | |
765 | (anonymous namespace)::a_function() | |
766 | (anonymous namespace)::b_function() | |
767 | ||
768 | ** GDB now has much improved linespec and explicit locations TAB | |
769 | completion support, that better understands what you're | |
770 | completing and offers better suggestions. For example, GDB no | |
771 | longer offers data symbols as possible completions when you're | |
772 | setting a breakpoint. | |
773 | ||
774 | ** GDB now TAB-completes label symbol names. | |
775 | ||
776 | ** The "complete" command now mimics TAB completion accurately. | |
777 | ||
778 | * New command line options (gcore) | |
779 | ||
780 | -a | |
781 | Dump all memory mappings. | |
782 | ||
783 | * Breakpoints on C++ functions are now set on all scopes by default | |
784 | ||
785 | By default, breakpoints on functions/methods are now interpreted as | |
786 | specifying all functions with the given name ignoring missing | |
787 | leading scopes (namespaces and classes). | |
788 | ||
789 | For example, assuming a C++ program with symbols named: | |
790 | ||
791 | A::B::func() | |
792 | B::func() | |
793 | ||
794 | both commands "break func()" and "break B::func()" set a breakpoint | |
795 | on both symbols. | |
796 | ||
797 | You can use the new flag "-qualified" to override this. This makes | |
798 | GDB interpret the specified function name as a complete | |
799 | fully-qualified name instead. For example, using the same C++ | |
800 | program, the "break -q B::func" command sets a breakpoint on | |
801 | "B::func", only. A parameter has been added to the Python | |
802 | gdb.Breakpoint constructor to achieve the same result when creating | |
803 | a breakpoint from Python. | |
804 | ||
805 | * Breakpoints on functions marked with C++ ABI tags | |
806 | ||
807 | GDB can now set breakpoints on functions marked with C++ ABI tags | |
808 | (e.g., [abi:cxx11]). See here for a description of ABI tags: | |
809 | https://developers.redhat.com/blog/2015/02/05/gcc5-and-the-c11-abi/ | |
810 | ||
811 | Functions with a C++11 abi tag are demangled/displayed like this: | |
812 | ||
813 | function[abi:cxx11](int) | |
814 | ^^^^^^^^^^^ | |
815 | ||
816 | You can now set a breakpoint on such functions simply as if they had | |
817 | no tag, like: | |
818 | ||
819 | (gdb) b function(int) | |
820 | ||
821 | Or if you need to disambiguate between tags, like: | |
822 | ||
823 | (gdb) b function[abi:other_tag](int) | |
824 | ||
825 | Tab completion was adjusted accordingly as well. | |
826 | ||
827 | * Python Scripting | |
828 | ||
829 | ** New events gdb.new_inferior, gdb.inferior_deleted, and | |
830 | gdb.new_thread are emitted. See the manual for further | |
831 | description of these. | |
832 | ||
833 | ** A new function, "gdb.rbreak" has been added to the Python API. | |
834 | This function allows the setting of a large number of breakpoints | |
835 | via a regex pattern in Python. See the manual for further details. | |
836 | ||
837 | ** Python breakpoints can now accept explicit locations. See the | |
838 | manual for a further description of this feature. | |
839 | ||
840 | ||
841 | * New features in the GDB remote stub, GDBserver | |
842 | ||
843 | ** GDBserver is now able to start inferior processes with a | |
844 | specified initial working directory. | |
845 | ||
846 | The user can set the desired working directory to be used from | |
847 | GDB using the new "set cwd" command. | |
848 | ||
849 | ** New "--selftest" command line option runs some GDBserver self | |
850 | tests. These self tests are disabled in releases. | |
851 | ||
852 | ** On Unix systems, GDBserver now does globbing expansion and variable | |
853 | substitution in inferior command line arguments. | |
854 | ||
855 | This is done by starting inferiors using a shell, like GDB does. | |
856 | See "set startup-with-shell" in the user manual for how to disable | |
857 | this from GDB when using "target extended-remote". When using | |
858 | "target remote", you can disable the startup with shell by using the | |
859 | new "--no-startup-with-shell" GDBserver command line option. | |
860 | ||
861 | ** On Unix systems, GDBserver now supports receiving environment | |
862 | variables that are to be set or unset from GDB. These variables | |
863 | will affect the environment to be passed to the inferior. | |
864 | ||
865 | * When catching an Ada exception raised with a message, GDB now prints | |
866 | the message in the catchpoint hit notification. In GDB/MI mode, that | |
867 | information is provided as an extra field named "exception-message" | |
868 | in the *stopped notification. | |
869 | ||
870 | * Trait objects can now be inspected When debugging Rust code. This | |
871 | requires compiler support which will appear in Rust 1.24. | |
872 | ||
873 | * New remote packets | |
874 | ||
875 | QEnvironmentHexEncoded | |
876 | Inform GDBserver of an environment variable that is to be passed to | |
877 | the inferior when starting it. | |
878 | ||
879 | QEnvironmentUnset | |
880 | Inform GDBserver of an environment variable that is to be unset | |
881 | before starting the remote inferior. | |
882 | ||
883 | QEnvironmentReset | |
884 | Inform GDBserver that the environment should be reset (i.e., | |
885 | user-set environment variables should be unset). | |
886 | ||
887 | QStartupWithShell | |
888 | Indicates whether the inferior must be started with a shell or not. | |
889 | ||
890 | QSetWorkingDir | |
891 | Tell GDBserver that the inferior to be started should use a specific | |
892 | working directory. | |
893 | ||
894 | * The "maintenance print c-tdesc" command now takes an optional | |
895 | argument which is the file name of XML target description. | |
896 | ||
897 | * The "maintenance selftest" command now takes an optional argument to | |
898 | filter the tests to be run. | |
899 | ||
900 | * The "enable", and "disable" commands now accept a range of | |
901 | breakpoint locations, e.g. "enable 1.3-5". | |
902 | ||
903 | * New commands | |
904 | ||
905 | set|show cwd | |
906 | Set and show the current working directory for the inferior. | |
907 | ||
908 | set|show compile-gcc | |
909 | Set and show compilation command used for compiling and injecting code | |
910 | with the 'compile' commands. | |
911 | ||
912 | set debug separate-debug-file | |
913 | show debug separate-debug-file | |
914 | Control the display of debug output about separate debug file search. | |
915 | ||
916 | set dump-excluded-mappings | |
917 | show dump-excluded-mappings | |
918 | Control whether mappings marked with the VM_DONTDUMP flag should be | |
919 | dumped when generating a core file. | |
920 | ||
921 | maint info selftests | |
922 | List the registered selftests. | |
923 | ||
924 | starti | |
925 | Start the debugged program stopping at the first instruction. | |
926 | ||
927 | set|show debug or1k | |
928 | Control display of debugging messages related to OpenRISC targets. | |
929 | ||
930 | set|show print type nested-type-limit | |
931 | Set and show the limit of nesting level for nested types that the | |
932 | type printer will show. | |
933 | ||
934 | * TUI Single-Key mode now supports two new shortcut keys: `i' for stepi and | |
935 | `o' for nexti. | |
936 | ||
937 | * Safer/improved support for debugging with no debug info | |
938 | ||
939 | GDB no longer assumes functions with no debug information return | |
940 | 'int'. | |
941 | ||
942 | This means that GDB now refuses to call such functions unless you | |
943 | tell it the function's type, by either casting the call to the | |
944 | declared return type, or by casting the function to a function | |
945 | pointer of the right type, and calling that: | |
946 | ||
947 | (gdb) p getenv ("PATH") | |
948 | 'getenv' has unknown return type; cast the call to its declared return type | |
949 | (gdb) p (char *) getenv ("PATH") | |
950 | $1 = 0x7fffffffe "/usr/local/bin:/"... | |
951 | (gdb) p ((char * (*) (const char *)) getenv) ("PATH") | |
952 | $2 = 0x7fffffffe "/usr/local/bin:/"... | |
953 | ||
954 | Similarly, GDB no longer assumes that global variables with no debug | |
955 | info have type 'int', and refuses to print the variable's value | |
956 | unless you tell it the variable's type: | |
957 | ||
958 | (gdb) p var | |
959 | 'var' has unknown type; cast it to its declared type | |
960 | (gdb) p (float) var | |
961 | $3 = 3.14 | |
962 | ||
963 | * New native configurations | |
964 | ||
965 | FreeBSD/aarch64 aarch64*-*-freebsd* | |
966 | FreeBSD/arm arm*-*-freebsd* | |
967 | ||
968 | * New targets | |
969 | ||
970 | FreeBSD/aarch64 aarch64*-*-freebsd* | |
971 | FreeBSD/arm arm*-*-freebsd* | |
972 | OpenRISC ELF or1k*-*-elf | |
973 | ||
974 | * Removed targets and native configurations | |
975 | ||
976 | Solaris 2.0-9 i?86-*-solaris2.[0-9], sparc*-*-solaris2.[0-9] | |
977 | ||
978 | *** Changes in GDB 8.0 | |
979 | ||
980 | * GDB now supports access to the PKU register on GNU/Linux. The register is | |
981 | added by the Memory Protection Keys for Userspace feature which will be | |
982 | available in future Intel CPUs. | |
983 | ||
984 | * GDB now supports C++11 rvalue references. | |
985 | ||
986 | * Python Scripting | |
987 | ||
988 | ** New functions to start, stop and access a running btrace recording. | |
989 | ** Rvalue references are now supported in gdb.Type. | |
990 | ||
991 | * GDB now supports recording and replaying rdrand and rdseed Intel 64 | |
992 | instructions. | |
993 | ||
994 | * Building GDB and GDBserver now requires a C++11 compiler. | |
995 | ||
996 | For example, GCC 4.8 or later. | |
997 | ||
998 | It is no longer possible to build GDB or GDBserver with a C | |
999 | compiler. The --disable-build-with-cxx configure option has been | |
1000 | removed. | |
1001 | ||
1002 | * Building GDB and GDBserver now requires GNU make >= 3.81. | |
1003 | ||
1004 | It is no longer supported to build GDB or GDBserver with another | |
1005 | implementation of the make program or an earlier version of GNU make. | |
1006 | ||
1007 | * Native debugging on MS-Windows supports command-line redirection | |
1008 | ||
1009 | Command-line arguments used for starting programs on MS-Windows can | |
1010 | now include redirection symbols supported by native Windows shells, | |
1011 | such as '<', '>', '>>', '2>&1', etc. This affects GDB commands such | |
1012 | as "run", "start", and "set args", as well as the corresponding MI | |
1013 | features. | |
1014 | ||
1015 | * Support for thread names on MS-Windows. | |
1016 | ||
1017 | GDB now catches and handles the special exception that programs | |
1018 | running on MS-Windows use to assign names to threads in the | |
1019 | debugger. | |
1020 | ||
1021 | * Support for Java programs compiled with gcj has been removed. | |
1022 | ||
1023 | * User commands now accept an unlimited number of arguments. | |
1024 | Previously, only up to 10 was accepted. | |
1025 | ||
1026 | * The "eval" command now expands user-defined command arguments. | |
1027 | ||
1028 | This makes it easier to process a variable number of arguments: | |
1029 | ||
1030 | define mycommand | |
1031 | set $i = 0 | |
1032 | while $i < $argc | |
1033 | eval "print $arg%d", $i | |
1034 | set $i = $i + 1 | |
1035 | end | |
1036 | end | |
1037 | ||
1038 | * Target descriptions can now describe registers for sparc32 and sparc64. | |
1039 | ||
1040 | * GDB now supports DWARF version 5 (debug information format). | |
1041 | Its .debug_names index is not yet supported. | |
1042 | ||
1043 | * New native configurations | |
1044 | ||
1045 | FreeBSD/mips mips*-*-freebsd | |
1046 | ||
1047 | * New targets | |
1048 | ||
1049 | Synopsys ARC arc*-*-elf32 | |
1050 | FreeBSD/mips mips*-*-freebsd | |
1051 | ||
1052 | * Removed targets and native configurations | |
1053 | ||
1054 | Alpha running FreeBSD alpha*-*-freebsd* | |
1055 | Alpha running GNU/kFreeBSD alpha*-*-kfreebsd*-gnu | |
1056 | ||
1057 | * New commands | |
1058 | ||
1059 | flash-erase | |
1060 | Erases all the flash memory regions reported by the target. | |
1061 | ||
1062 | maint print arc arc-instruction address | |
1063 | Print internal disassembler information about instruction at a given address. | |
1064 | ||
1065 | * New options | |
1066 | ||
1067 | set disassembler-options | |
1068 | show disassembler-options | |
1069 | Controls the passing of target specific information to the disassembler. | |
1070 | If it is necessary to specify more than one disassembler option then | |
1071 | multiple options can be placed together into a comma separated list. | |
1072 | The default value is the empty string. Currently, the only supported | |
1073 | targets are ARM, PowerPC and S/390. | |
1074 | ||
1075 | * New MI commands | |
1076 | ||
1077 | -target-flash-erase | |
1078 | Erases all the flash memory regions reported by the target. This is | |
1079 | equivalent to the CLI command flash-erase. | |
1080 | ||
1081 | -file-list-shared-libraries | |
1082 | List the shared libraries in the program. This is | |
1083 | equivalent to the CLI command "info shared". | |
1084 | ||
1085 | -catch-handlers | |
1086 | Catchpoints stopping the program when Ada exceptions are | |
1087 | handled. This is equivalent to the CLI command "catch handlers". | |
1088 | ||
1089 | *** Changes in GDB 7.12 | |
1090 | ||
1091 | * GDB and GDBserver now build with a C++ compiler by default. | |
1092 | ||
1093 | The --enable-build-with-cxx configure option is now enabled by | |
1094 | default. One must now explicitly configure with | |
1095 | --disable-build-with-cxx in order to build with a C compiler. This | |
1096 | option will be removed in a future release. | |
1097 | ||
1098 | * GDBserver now supports recording btrace without maintaining an active | |
1099 | GDB connection. | |
1100 | ||
1101 | * GDB now supports a negative repeat count in the 'x' command to examine | |
1102 | memory backward from the given address. For example: | |
1103 | ||
1104 | (gdb) bt | |
1105 | #0 Func1 (n=42, p=0x40061c "hogehoge") at main.cpp:4 | |
1106 | #1 0x400580 in main (argc=1, argv=0x7fffffffe5c8) at main.cpp:8 | |
1107 | (gdb) x/-5i 0x0000000000400580 | |
1108 | 0x40056a <main(int, char**)+8>: mov %edi,-0x4(%rbp) | |
1109 | 0x40056d <main(int, char**)+11>: mov %rsi,-0x10(%rbp) | |
1110 | 0x400571 <main(int, char**)+15>: mov $0x40061c,%esi | |
1111 | 0x400576 <main(int, char**)+20>: mov $0x2a,%edi | |
1112 | 0x40057b <main(int, char**)+25>: | |
1113 | callq 0x400536 <Func1(int, char const*)> | |
1114 | ||
1115 | * Fortran: Support structures with fields of dynamic types and | |
1116 | arrays of dynamic types. | |
1117 | ||
1118 | * The symbol dumping maintenance commands have new syntax. | |
1119 | maint print symbols [-pc address] [--] [filename] | |
1120 | maint print symbols [-objfile objfile] [-source source] [--] [filename] | |
1121 | maint print psymbols [-objfile objfile] [-pc address] [--] [filename] | |
1122 | maint print psymbols [-objfile objfile] [-source source] [--] [filename] | |
1123 | maint print msymbols [-objfile objfile] [--] [filename] | |
1124 | ||
1125 | * GDB now supports multibit bitfields and enums in target register | |
1126 | descriptions. | |
1127 | ||
1128 | * New Python-based convenience function $_as_string(val), which returns | |
1129 | the textual representation of a value. This function is especially | |
1130 | useful to obtain the text label of an enum value. | |
1131 | ||
1132 | * Intel MPX bound violation handling. | |
1133 | ||
1134 | Segmentation faults caused by a Intel MPX boundary violation | |
1135 | now display the kind of violation (upper or lower), the memory | |
1136 | address accessed and the memory bounds, along with the usual | |
1137 | signal received and code location. | |
1138 | ||
1139 | For example: | |
1140 | ||
1141 | Program received signal SIGSEGV, Segmentation fault | |
1142 | Upper bound violation while accessing address 0x7fffffffc3b3 | |
1143 | Bounds: [lower = 0x7fffffffc390, upper = 0x7fffffffc3a3] | |
1144 | 0x0000000000400d7c in upper () at i386-mpx-sigsegv.c:68 | |
1145 | ||
1146 | * Rust language support. | |
1147 | GDB now supports debugging programs written in the Rust programming | |
1148 | language. See https://www.rust-lang.org/ for more information about | |
1149 | Rust. | |
1150 | ||
1151 | * Support for running interpreters on specified input/output devices | |
1152 | ||
1153 | GDB now supports a new mechanism that allows frontends to provide | |
1154 | fully featured GDB console views, as a better alternative to | |
1155 | building such views on top of the "-interpreter-exec console" | |
1156 | command. See the new "new-ui" command below. With that command, | |
1157 | frontends can now start GDB in the traditional command-line mode | |
1158 | running in an embedded terminal emulator widget, and create a | |
1159 | separate MI interpreter running on a specified i/o device. In this | |
1160 | way, GDB handles line editing, history, tab completion, etc. in the | |
1161 | console all by itself, and the GUI uses the separate MI interpreter | |
1162 | for its own control and synchronization, invisible to the command | |
1163 | line. | |
1164 | ||
1165 | * The "catch syscall" command catches groups of related syscalls. | |
1166 | ||
1167 | The "catch syscall" command now supports catching a group of related | |
1168 | syscalls using the 'group:' or 'g:' prefix. | |
1169 | ||
1170 | * New commands | |
1171 | ||
1172 | skip -file file | |
1173 | skip -gfile file-glob-pattern | |
1174 | skip -function function | |
1175 | skip -rfunction regular-expression | |
1176 | A generalized form of the skip command, with new support for | |
1177 | glob-style file names and regular expressions for function names. | |
1178 | Additionally, a file spec and a function spec may now be combined. | |
1179 | ||
1180 | maint info line-table REGEXP | |
1181 | Display the contents of GDB's internal line table data struture. | |
1182 | ||
1183 | maint selftest | |
1184 | Run any GDB unit tests that were compiled in. | |
1185 | ||
1186 | new-ui INTERP TTY | |
1187 | Start a new user interface instance running INTERP as interpreter, | |
1188 | using the TTY file for input/output. | |
1189 | ||
1190 | * Python Scripting | |
1191 | ||
1192 | ** gdb.Breakpoint objects have a new attribute "pending", which | |
1193 | indicates whether the breakpoint is pending. | |
1194 | ** Three new breakpoint-related events have been added: | |
1195 | gdb.breakpoint_created, gdb.breakpoint_modified, and | |
1196 | gdb.breakpoint_deleted. | |
1197 | ||
1198 | signal-event EVENTID | |
1199 | Signal ("set") the given MS-Windows event object. This is used in | |
1200 | conjunction with the Windows JIT debugging (AeDebug) support, where | |
1201 | the OS suspends a crashing process until a debugger can attach to | |
1202 | it. Resuming the crashing process, in order to debug it, is done by | |
1203 | signalling an event. | |
1204 | ||
1205 | * Support for tracepoints and fast tracepoints on s390-linux and s390x-linux | |
1206 | was added in GDBserver, including JIT compiling fast tracepoint's | |
1207 | conditional expression bytecode into native code. | |
1208 | ||
1209 | * Support for various remote target protocols and ROM monitors has | |
1210 | been removed: | |
1211 | ||
1212 | target m32rsdi Remote M32R debugging over SDI | |
1213 | target mips MIPS remote debugging protocol | |
1214 | target pmon PMON ROM monitor | |
1215 | target ddb NEC's DDB variant of PMON for Vr4300 | |
1216 | target rockhopper NEC RockHopper variant of PMON | |
1217 | target lsi LSI variant of PMO | |
1218 | ||
1219 | * Support for tracepoints and fast tracepoints on powerpc-linux, | |
1220 | powerpc64-linux, and powerpc64le-linux was added in GDBserver, | |
1221 | including JIT compiling fast tracepoint's conditional expression | |
1222 | bytecode into native code. | |
1223 | ||
1224 | * MI async record =record-started now includes the method and format used for | |
1225 | recording. For example: | |
1226 | ||
1227 | =record-started,thread-group="i1",method="btrace",format="bts" | |
1228 | ||
1229 | * MI async record =thread-selected now includes the frame field. For example: | |
1230 | ||
1231 | =thread-selected,id="3",frame={level="0",addr="0x00000000004007c0"} | |
1232 | ||
1233 | * New targets | |
1234 | ||
1235 | Andes NDS32 nds32*-*-elf | |
1236 | ||
1237 | *** Changes in GDB 7.11 | |
1238 | ||
1239 | * GDB now supports debugging kernel-based threads on FreeBSD. | |
1240 | ||
1241 | * Per-inferior thread numbers | |
1242 | ||
1243 | Thread numbers are now per inferior instead of global. If you're | |
1244 | debugging multiple inferiors, GDB displays thread IDs using a | |
1245 | qualified INF_NUM.THR_NUM form. For example: | |
1246 | ||
1247 | (gdb) info threads | |
1248 | Id Target Id Frame | |
1249 | 1.1 Thread 0x7ffff7fc2740 (LWP 8155) (running) | |
1250 | 1.2 Thread 0x7ffff7fc1700 (LWP 8168) (running) | |
1251 | * 2.1 Thread 0x7ffff7fc2740 (LWP 8157) (running) | |
1252 | 2.2 Thread 0x7ffff7fc1700 (LWP 8190) (running) | |
1253 | ||
1254 | As consequence, thread numbers as visible in the $_thread | |
1255 | convenience variable and in Python's InferiorThread.num attribute | |
1256 | are no longer unique between inferiors. | |
1257 | ||
1258 | GDB now maintains a second thread ID per thread, referred to as the | |
1259 | global thread ID, which is the new equivalent of thread numbers in | |
1260 | previous releases. See also $_gthread below. | |
1261 | ||
1262 | For backwards compatibility, MI's thread IDs always refer to global | |
1263 | IDs. | |
1264 | ||
1265 | * Commands that accept thread IDs now accept the qualified | |
1266 | INF_NUM.THR_NUM form as well. For example: | |
1267 | ||
1268 | (gdb) thread 2.1 | |
1269 | [Switching to thread 2.1 (Thread 0x7ffff7fc2740 (LWP 8157))] (running) | |
1270 | (gdb) | |
1271 | ||
1272 | * In commands that accept a list of thread IDs, you can now refer to | |
1273 | all threads of an inferior using a star wildcard. GDB accepts | |
1274 | "INF_NUM.*", to refer to all threads of inferior INF_NUM, and "*" to | |
1275 | refer to all threads of the current inferior. For example, "info | |
1276 | threads 2.*". | |
1277 | ||
1278 | * You can use "info threads -gid" to display the global thread ID of | |
1279 | all threads. | |
1280 | ||
1281 | * The new convenience variable $_gthread holds the global number of | |
1282 | the current thread. | |
1283 | ||
1284 | * The new convenience variable $_inferior holds the number of the | |
1285 | current inferior. | |
1286 | ||
1287 | * GDB now displays the ID and name of the thread that hit a breakpoint | |
1288 | or received a signal, if your program is multi-threaded. For | |
1289 | example: | |
1290 | ||
1291 | Thread 3 "bar" hit Breakpoint 1 at 0x40087a: file program.c, line 20. | |
1292 | Thread 1 "main" received signal SIGINT, Interrupt. | |
1293 | ||
1294 | * Record btrace now supports non-stop mode. | |
1295 | ||
1296 | * Support for tracepoints on aarch64-linux was added in GDBserver. | |
1297 | ||
1298 | * The 'record instruction-history' command now indicates speculative execution | |
1299 | when using the Intel Processor Trace recording format. | |
1300 | ||
1301 | * GDB now allows users to specify explicit locations, bypassing | |
1302 | the linespec parser. This feature is also available to GDB/MI | |
1303 | clients. | |
1304 | ||
1305 | * Multi-architecture debugging is supported on AArch64 GNU/Linux. | |
1306 | GDB now is able to debug both AArch64 applications and ARM applications | |
1307 | at the same time. | |
1308 | ||
1309 | * Support for fast tracepoints on aarch64-linux was added in GDBserver, | |
1310 | including JIT compiling fast tracepoint's conditional expression bytecode | |
1311 | into native code. | |
1312 | ||
1313 | * GDB now supports displaced stepping on AArch64 GNU/Linux. | |
1314 | ||
1315 | * "info threads", "info inferiors", "info display", "info checkpoints" | |
1316 | and "maint info program-spaces" now list the corresponding items in | |
1317 | ascending ID order, for consistency with all other "info" commands. | |
1318 | ||
1319 | * In Ada, the overloads selection menu has been enhanced to display the | |
1320 | parameter types and the return types for the matching overloaded subprograms. | |
1321 | ||
1322 | * New commands | |
1323 | ||
1324 | maint set target-non-stop (on|off|auto) | |
1325 | maint show target-non-stop | |
1326 | Control whether GDB targets always operate in non-stop mode even if | |
1327 | "set non-stop" is "off". The default is "auto", meaning non-stop | |
1328 | mode is enabled if supported by the target. | |
1329 | ||
1330 | maint set bfd-sharing | |
1331 | maint show bfd-sharing | |
1332 | Control the reuse of bfd objects. | |
1333 | ||
1334 | set debug bfd-cache | |
1335 | show debug bfd-cache | |
1336 | Control display of debugging info regarding bfd caching. | |
1337 | ||
1338 | set debug fbsd-lwp | |
1339 | show debug fbsd-lwp | |
1340 | Control display of debugging info regarding FreeBSD threads. | |
1341 | ||
1342 | set remote multiprocess-extensions-packet | |
1343 | show remote multiprocess-extensions-packet | |
1344 | Set/show the use of the remote protocol multiprocess extensions. | |
1345 | ||
1346 | set remote thread-events | |
1347 | show remote thread-events | |
1348 | Set/show the use of thread create/exit events. | |
1349 | ||
1350 | set ada print-signatures on|off | |
1351 | show ada print-signatures" | |
1352 | Control whether parameter types and return types are displayed in overloads | |
1353 | selection menus. It is activaled (@code{on}) by default. | |
1354 | ||
1355 | set max-value-size | |
1356 | show max-value-size | |
1357 | Controls the maximum size of memory, in bytes, that GDB will | |
1358 | allocate for value contents. Prevents incorrect programs from | |
1359 | causing GDB to allocate overly large buffers. Default is 64k. | |
1360 | ||
1361 | * The "disassemble" command accepts a new modifier: /s. | |
1362 | It prints mixed source+disassembly like /m with two differences: | |
1363 | - disassembled instructions are now printed in program order, and | |
1364 | - and source for all relevant files is now printed. | |
1365 | The "/m" option is now considered deprecated: its "source-centric" | |
1366 | output hasn't proved useful in practice. | |
1367 | ||
1368 | * The "record instruction-history" command accepts a new modifier: /s. | |
1369 | It behaves exactly like /m and prints mixed source+disassembly. | |
1370 | ||
1371 | * The "set scheduler-locking" command supports a new mode "replay". | |
1372 | It behaves like "off" in record mode and like "on" in replay mode. | |
1373 | ||
1374 | * Support for various ROM monitors has been removed: | |
1375 | ||
1376 | target dbug dBUG ROM monitor for Motorola ColdFire | |
1377 | target picobug Motorola picobug monitor | |
1378 | target dink32 DINK32 ROM monitor for PowerPC | |
1379 | target m32r Renesas M32R/D ROM monitor | |
1380 | target mon2000 mon2000 ROM monitor | |
1381 | target ppcbug PPCBUG ROM monitor for PowerPC | |
1382 | ||
1383 | * Support for reading/writing memory and extracting values on architectures | |
1384 | whose memory is addressable in units of any integral multiple of 8 bits. | |
1385 | ||
1386 | catch handlers | |
1387 | Allows to break when an Ada exception is handled. | |
1388 | ||
1389 | * New remote packets | |
1390 | ||
1391 | exec stop reason | |
1392 | Indicates that an exec system call was executed. | |
1393 | ||
1394 | exec-events feature in qSupported | |
1395 | The qSupported packet allows GDB to request support for exec | |
1396 | events using the new 'gdbfeature' exec-event, and the qSupported | |
1397 | response can contain the corresponding 'stubfeature'. Set and | |
1398 | show commands can be used to display whether these features are enabled. | |
1399 | ||
1400 | vCtrlC | |
1401 | Equivalent to interrupting with the ^C character, but works in | |
1402 | non-stop mode. | |
1403 | ||
1404 | thread created stop reason (T05 create:...) | |
1405 | Indicates that the thread was just created and is stopped at entry. | |
1406 | ||
1407 | thread exit stop reply (w exitcode;tid) | |
1408 | Indicates that the thread has terminated. | |
1409 | ||
1410 | QThreadEvents | |
1411 | Enables/disables thread create and exit event reporting. For | |
1412 | example, this is used in non-stop mode when GDB stops a set of | |
1413 | threads and synchronously waits for the their corresponding stop | |
1414 | replies. Without exit events, if one of the threads exits, GDB | |
1415 | would hang forever not knowing that it should no longer expect a | |
1416 | stop for that same thread. | |
1417 | ||
1418 | N stop reply | |
1419 | Indicates that there are no resumed threads left in the target (all | |
1420 | threads are stopped). The remote stub reports support for this stop | |
1421 | reply to GDB's qSupported query. | |
1422 | ||
1423 | QCatchSyscalls | |
1424 | Enables/disables catching syscalls from the inferior process. | |
1425 | The remote stub reports support for this packet to GDB's qSupported query. | |
1426 | ||
1427 | syscall_entry stop reason | |
1428 | Indicates that a syscall was just called. | |
1429 | ||
1430 | syscall_return stop reason | |
1431 | Indicates that a syscall just returned. | |
1432 | ||
1433 | * Extended-remote exec events | |
1434 | ||
1435 | ** GDB now has support for exec events on extended-remote Linux targets. | |
1436 | For such targets with Linux kernels 2.5.46 and later, this enables | |
1437 | follow-exec-mode and exec catchpoints. | |
1438 | ||
1439 | set remote exec-event-feature-packet | |
1440 | show remote exec-event-feature-packet | |
1441 | Set/show the use of the remote exec event feature. | |
1442 | ||
1443 | * Thread names in remote protocol | |
1444 | ||
1445 | The reply to qXfer:threads:read may now include a name attribute for each | |
1446 | thread. | |
1447 | ||
1448 | * Target remote mode fork and exec events | |
1449 | ||
1450 | ** GDB now has support for fork and exec events on target remote mode | |
1451 | Linux targets. For such targets with Linux kernels 2.5.46 and later, | |
1452 | this enables follow-fork-mode, detach-on-fork, follow-exec-mode, and | |
1453 | fork and exec catchpoints. | |
1454 | ||
1455 | * Remote syscall events | |
1456 | ||
1457 | ** GDB now has support for catch syscall on remote Linux targets, | |
1458 | currently enabled on x86/x86_64 architectures. | |
1459 | ||
1460 | set remote catch-syscall-packet | |
1461 | show remote catch-syscall-packet | |
1462 | Set/show the use of the remote catch syscall feature. | |
1463 | ||
1464 | * MI changes | |
1465 | ||
1466 | ** The -var-set-format command now accepts the zero-hexadecimal | |
1467 | format. It outputs data in hexadecimal format with zero-padding on the | |
1468 | left. | |
1469 | ||
1470 | * Python Scripting | |
1471 | ||
1472 | ** gdb.InferiorThread objects have a new attribute "global_num", | |
1473 | which refers to the thread's global thread ID. The existing | |
1474 | "num" attribute now refers to the thread's per-inferior number. | |
1475 | See "Per-inferior thread numbers" above. | |
1476 | ** gdb.InferiorThread objects have a new attribute "inferior", which | |
1477 | is the Inferior object the thread belongs to. | |
1478 | ||
1479 | *** Changes in GDB 7.10 | |
1480 | ||
1481 | * Support for process record-replay and reverse debugging on aarch64*-linux* | |
1482 | targets has been added. GDB now supports recording of A64 instruction set | |
1483 | including advance SIMD instructions. | |
1484 | ||
1485 | * Support for Sun's version of the "stabs" debug file format has been removed. | |
1486 | ||
1487 | * GDB now honors the content of the file /proc/PID/coredump_filter | |
1488 | (PID is the process ID) on GNU/Linux systems. This file can be used | |
1489 | to specify the types of memory mappings that will be included in a | |
1490 | corefile. For more information, please refer to the manual page of | |
1491 | "core(5)". GDB also has a new command: "set use-coredump-filter | |
1492 | on|off". It allows to set whether GDB will read the content of the | |
1493 | /proc/PID/coredump_filter file when generating a corefile. | |
1494 | ||
1495 | * The "info os" command on GNU/Linux can now display information on | |
1496 | cpu information : | |
1497 | "info os cpus" Listing of all cpus/cores on the system | |
1498 | ||
1499 | * GDB has two new commands: "set serial parity odd|even|none" and | |
1500 | "show serial parity". These allows to set or show parity for the | |
1501 | remote serial I/O. | |
1502 | ||
1503 | * The "info source" command now displays the producer string if it was | |
1504 | present in the debug info. This typically includes the compiler version | |
1505 | and may include things like its command line arguments. | |
1506 | ||
1507 | * The "info dll", an alias of the "info sharedlibrary" command, | |
1508 | is now available on all platforms. | |
1509 | ||
1510 | * Directory names supplied to the "set sysroot" commands may be | |
1511 | prefixed with "target:" to tell GDB to access shared libraries from | |
1512 | the target system, be it local or remote. This replaces the prefix | |
1513 | "remote:". The default sysroot has been changed from "" to | |
1514 | "target:". "remote:" is automatically converted to "target:" for | |
1515 | backward compatibility. | |
1516 | ||
1517 | * The system root specified by "set sysroot" will be prepended to the | |
1518 | filename of the main executable (if reported to GDB as absolute by | |
1519 | the operating system) when starting processes remotely, and when | |
1520 | attaching to already-running local or remote processes. | |
1521 | ||
1522 | * GDB now supports automatic location and retrieval of executable | |
1523 | files from remote targets. Remote debugging can now be initiated | |
1524 | using only a "target remote" or "target extended-remote" command | |
1525 | (no "set sysroot" or "file" commands are required). See "New remote | |
1526 | packets" below. | |
1527 | ||
1528 | * The "dump" command now supports verilog hex format. | |
1529 | ||
1530 | * GDB now supports the vector ABI on S/390 GNU/Linux targets. | |
1531 | ||
1532 | * On GNU/Linux, GDB and gdbserver are now able to access executable | |
1533 | and shared library files without a "set sysroot" command when | |
1534 | attaching to processes running in different mount namespaces from | |
1535 | the debugger. This makes it possible to attach to processes in | |
1536 | containers as simply as "gdb -p PID" or "gdbserver --attach PID". | |
1537 | See "New remote packets" below. | |
1538 | ||
1539 | * The "tui reg" command now provides completion for all of the | |
1540 | available register groups, including target specific groups. | |
1541 | ||
1542 | * The HISTSIZE environment variable is no longer read when determining | |
1543 | the size of GDB's command history. GDB now instead reads the dedicated | |
1544 | GDBHISTSIZE environment variable. Setting GDBHISTSIZE to "-1" or to "" now | |
1545 | disables truncation of command history. Non-numeric values of GDBHISTSIZE | |
1546 | are ignored. | |
1547 | ||
1548 | * Guile Scripting | |
1549 | ||
1550 | ** Memory ports can now be unbuffered. | |
1551 | ||
1552 | * Python Scripting | |
1553 | ||
1554 | ** gdb.Objfile objects have a new attribute "username", | |
1555 | which is the name of the objfile as specified by the user, | |
1556 | without, for example, resolving symlinks. | |
1557 | ** You can now write frame unwinders in Python. | |
1558 | ** gdb.Type objects have a new method "optimized_out", | |
1559 | returning optimized out gdb.Value instance of this type. | |
1560 | ** gdb.Value objects have new methods "reference_value" and | |
1561 | "const_value" which return a reference to the value and a | |
1562 | "const" version of the value respectively. | |
1563 | ||
1564 | * New commands | |
1565 | ||
1566 | maint print symbol-cache | |
1567 | Print the contents of the symbol cache. | |
1568 | ||
1569 | maint print symbol-cache-statistics | |
1570 | Print statistics of symbol cache usage. | |
1571 | ||
1572 | maint flush-symbol-cache | |
1573 | Flush the contents of the symbol cache. | |
1574 | ||
1575 | record btrace bts | |
1576 | record bts | |
1577 | Start branch trace recording using Branch Trace Store (BTS) format. | |
1578 | ||
1579 | compile print | |
1580 | Evaluate expression by using the compiler and print result. | |
1581 | ||
1582 | tui enable | |
1583 | tui disable | |
1584 | Explicit commands for enabling and disabling tui mode. | |
1585 | ||
1586 | show mpx bound | |
1587 | set mpx bound on i386 and amd64 | |
1588 | Support for bound table investigation on Intel MPX enabled applications. | |
1589 | ||
1590 | record btrace pt | |
1591 | record pt | |
1592 | Start branch trace recording using Intel Processor Trace format. | |
1593 | ||
1594 | maint info btrace | |
1595 | Print information about branch tracing internals. | |
1596 | ||
1597 | maint btrace packet-history | |
1598 | Print the raw branch tracing data. | |
1599 | ||
1600 | maint btrace clear-packet-history | |
1601 | Discard the stored raw branch tracing data. | |
1602 | ||
1603 | maint btrace clear | |
1604 | Discard all branch tracing data. It will be fetched and processed | |
1605 | anew by the next "record" command. | |
1606 | ||
1607 | * New options | |
1608 | ||
1609 | set debug dwarf-die | |
1610 | Renamed from "set debug dwarf2-die". | |
1611 | show debug dwarf-die | |
1612 | Renamed from "show debug dwarf2-die". | |
1613 | ||
1614 | set debug dwarf-read | |
1615 | Renamed from "set debug dwarf2-read". | |
1616 | show debug dwarf-read | |
1617 | Renamed from "show debug dwarf2-read". | |
1618 | ||
1619 | maint set dwarf always-disassemble | |
1620 | Renamed from "maint set dwarf2 always-disassemble". | |
1621 | maint show dwarf always-disassemble | |
1622 | Renamed from "maint show dwarf2 always-disassemble". | |
1623 | ||
1624 | maint set dwarf max-cache-age | |
1625 | Renamed from "maint set dwarf2 max-cache-age". | |
1626 | maint show dwarf max-cache-age | |
1627 | Renamed from "maint show dwarf2 max-cache-age". | |
1628 | ||
1629 | set debug dwarf-line | |
1630 | show debug dwarf-line | |
1631 | Control display of debugging info regarding DWARF line processing. | |
1632 | ||
1633 | set max-completions | |
1634 | show max-completions | |
1635 | Set the maximum number of candidates to be considered during | |
1636 | completion. The default value is 200. This limit allows GDB | |
1637 | to avoid generating large completion lists, the computation of | |
1638 | which can cause the debugger to become temporarily unresponsive. | |
1639 | ||
1640 | set history remove-duplicates | |
1641 | show history remove-duplicates | |
1642 | Control the removal of duplicate history entries. | |
1643 | ||
1644 | maint set symbol-cache-size | |
1645 | maint show symbol-cache-size | |
1646 | Control the size of the symbol cache. | |
1647 | ||
1648 | set|show record btrace bts buffer-size | |
1649 | Set and show the size of the ring buffer used for branch tracing in | |
1650 | BTS format. | |
1651 | The obtained size may differ from the requested size. Use "info | |
1652 | record" to see the obtained buffer size. | |
1653 | ||
1654 | set debug linux-namespaces | |
1655 | show debug linux-namespaces | |
1656 | Control display of debugging info regarding Linux namespaces. | |
1657 | ||
1658 | set|show record btrace pt buffer-size | |
1659 | Set and show the size of the ring buffer used for branch tracing in | |
1660 | Intel Processor Trace format. | |
1661 | The obtained size may differ from the requested size. Use "info | |
1662 | record" to see the obtained buffer size. | |
1663 | ||
1664 | maint set|show btrace pt skip-pad | |
1665 | Set and show whether PAD packets are skipped when computing the | |
1666 | packet history. | |
1667 | ||
1668 | * The command 'thread apply all' can now support new option '-ascending' | |
1669 | to call its specified command for all threads in ascending order. | |
1670 | ||
1671 | * Python/Guile scripting | |
1672 | ||
1673 | ** GDB now supports auto-loading of Python/Guile scripts contained in the | |
1674 | special section named `.debug_gdb_scripts'. | |
1675 | ||
1676 | * New remote packets | |
1677 | ||
1678 | qXfer:btrace-conf:read | |
1679 | Return the branch trace configuration for the current thread. | |
1680 | ||
1681 | Qbtrace-conf:bts:size | |
1682 | Set the requested ring buffer size for branch tracing in BTS format. | |
1683 | ||
1684 | Qbtrace:pt | |
1685 | Enable Intel Procesor Trace-based branch tracing for the current | |
1686 | process. The remote stub reports support for this packet to GDB's | |
1687 | qSupported query. | |
1688 | ||
1689 | Qbtrace-conf:pt:size | |
1690 | Set the requested ring buffer size for branch tracing in Intel Processor | |
1691 | Trace format. | |
1692 | ||
1693 | swbreak stop reason | |
1694 | Indicates a memory breakpoint instruction was executed, irrespective | |
1695 | of whether it was GDB that planted the breakpoint or the breakpoint | |
1696 | is hardcoded in the program. This is required for correct non-stop | |
1697 | mode operation. | |
1698 | ||
1699 | hwbreak stop reason | |
1700 | Indicates the target stopped for a hardware breakpoint. This is | |
1701 | required for correct non-stop mode operation. | |
1702 | ||
1703 | vFile:fstat: | |
1704 | Return information about files on the remote system. | |
1705 | ||
1706 | qXfer:exec-file:read | |
1707 | Return the full absolute name of the file that was executed to | |
1708 | create a process running on the remote system. | |
1709 | ||
1710 | vFile:setfs: | |
1711 | Select the filesystem on which vFile: operations with filename | |
1712 | arguments will operate. This is required for GDB to be able to | |
1713 | access files on remote targets where the remote stub does not | |
1714 | share a common filesystem with the inferior(s). | |
1715 | ||
1716 | fork stop reason | |
1717 | Indicates that a fork system call was executed. | |
1718 | ||
1719 | vfork stop reason | |
1720 | Indicates that a vfork system call was executed. | |
1721 | ||
1722 | vforkdone stop reason | |
1723 | Indicates that a vfork child of the specified process has executed | |
1724 | an exec or exit, allowing the vfork parent to resume execution. | |
1725 | ||
1726 | fork-events and vfork-events features in qSupported | |
1727 | The qSupported packet allows GDB to request support for fork and | |
1728 | vfork events using new 'gdbfeatures' fork-events and vfork-events, | |
1729 | and the qSupported response can contain the corresponding | |
1730 | 'stubfeatures'. Set and show commands can be used to display | |
1731 | whether these features are enabled. | |
1732 | ||
1733 | * Extended-remote fork events | |
1734 | ||
1735 | ** GDB now has support for fork events on extended-remote Linux | |
1736 | targets. For targets with Linux kernels 2.5.60 and later, this | |
1737 | enables follow-fork-mode and detach-on-fork for both fork and | |
1738 | vfork, as well as fork and vfork catchpoints. | |
1739 | ||
1740 | * The info record command now shows the recording format and the | |
1741 | branch tracing configuration for the current thread when using | |
1742 | the btrace record target. | |
1743 | For the BTS format, it shows the ring buffer size. | |
1744 | ||
1745 | * GDB now has support for DTrace USDT (Userland Static Defined | |
1746 | Tracing) probes. The supported targets are x86_64-*-linux-gnu. | |
1747 | ||
1748 | * GDB now supports access to vector registers on S/390 GNU/Linux | |
1749 | targets. | |
1750 | ||
1751 | * Removed command line options | |
1752 | ||
1753 | -xdb HP-UX XDB compatibility mode. | |
1754 | ||
1755 | * Removed targets and native configurations | |
1756 | ||
1757 | HP/PA running HP-UX hppa*-*-hpux* | |
1758 | Itanium running HP-UX ia64-*-hpux* | |
1759 | ||
1760 | * New configure options | |
1761 | ||
1762 | --with-intel-pt | |
1763 | This configure option allows the user to build GDB with support for | |
1764 | Intel Processor Trace (default: auto). This requires libipt. | |
1765 | ||
1766 | --with-libipt-prefix=PATH | |
1767 | Specify the path to the version of libipt that GDB should use. | |
1768 | $PATH/include should contain the intel-pt.h header and | |
1769 | $PATH/lib should contain the libipt.so library. | |
1770 | ||
1771 | *** Changes in GDB 7.9.1 | |
1772 | ||
1773 | * Python Scripting | |
1774 | ||
1775 | ** Xmethods can now specify a result type. | |
1776 | ||
1777 | *** Changes in GDB 7.9 | |
1778 | ||
1779 | * GDB now supports hardware watchpoints on x86 GNU Hurd. | |
1780 | ||
1781 | * Python Scripting | |
1782 | ||
1783 | ** You can now access frame registers from Python scripts. | |
1784 | ** New attribute 'producer' for gdb.Symtab objects. | |
1785 | ** gdb.Objfile objects have a new attribute "progspace", | |
1786 | which is the gdb.Progspace object of the containing program space. | |
1787 | ** gdb.Objfile objects have a new attribute "owner". | |
1788 | ** gdb.Objfile objects have a new attribute "build_id", | |
1789 | which is the build ID generated when the file was built. | |
1790 | ** gdb.Objfile objects have a new method "add_separate_debug_file". | |
1791 | ** A new event "gdb.clear_objfiles" has been added, triggered when | |
1792 | selecting a new file to debug. | |
1793 | ** You can now add attributes to gdb.Objfile and gdb.Progspace objects. | |
1794 | ** New function gdb.lookup_objfile. | |
1795 | ||
1796 | New events which are triggered when GDB modifies the state of the | |
1797 | inferior. | |
1798 | ||
1799 | ** gdb.events.inferior_call_pre: Function call is about to be made. | |
1800 | ** gdb.events.inferior_call_post: Function call has just been made. | |
1801 | ** gdb.events.memory_changed: A memory location has been altered. | |
1802 | ** gdb.events.register_changed: A register has been altered. | |
1803 | ||
1804 | * New Python-based convenience functions: | |
1805 | ||
1806 | ** $_caller_is(name [, number_of_frames]) | |
1807 | ** $_caller_matches(regexp [, number_of_frames]) | |
1808 | ** $_any_caller_is(name [, number_of_frames]) | |
1809 | ** $_any_caller_matches(regexp [, number_of_frames]) | |
1810 | ||
1811 | * GDB now supports the compilation and injection of source code into | |
1812 | the inferior. GDB will use GCC 5.0 or higher built with libcc1.so | |
1813 | to compile the source code to object code, and if successful, inject | |
1814 | and execute that code within the current context of the inferior. | |
1815 | Currently the C language is supported. The commands used to | |
1816 | interface with this new feature are: | |
1817 | ||
1818 | compile code [-raw|-r] [--] [source code] | |
1819 | compile file [-raw|-r] filename | |
1820 | ||
1821 | * New commands | |
1822 | ||
1823 | demangle [-l language] [--] name | |
1824 | Demangle "name" in the specified language, or the current language | |
1825 | if elided. This command is renamed from the "maint demangle" command. | |
1826 | The latter is kept as a no-op to avoid "maint demangle" being interpreted | |
1827 | as "maint demangler-warning". | |
1828 | ||
1829 | queue-signal signal-name-or-number | |
1830 | Queue a signal to be delivered to the thread when it is resumed. | |
1831 | ||
1832 | add-auto-load-scripts-directory directory | |
1833 | Add entries to the list of directories from which to load auto-loaded | |
1834 | scripts. | |
1835 | ||
1836 | maint print user-registers | |
1837 | List all currently available "user" registers. | |
1838 | ||
1839 | compile code [-r|-raw] [--] [source code] | |
1840 | Compile, inject, and execute in the inferior the executable object | |
1841 | code produced by compiling the provided source code. | |
1842 | ||
1843 | compile file [-r|-raw] filename | |
1844 | Compile and inject into the inferior the executable object code | |
1845 | produced by compiling the source code stored in the filename | |
1846 | provided. | |
1847 | ||
1848 | * On resume, GDB now always passes the signal the program had stopped | |
1849 | for to the thread the signal was sent to, even if the user changed | |
1850 | threads before resuming. Previously GDB would often (but not | |
1851 | always) deliver the signal to the thread that happens to be current | |
1852 | at resume time. | |
1853 | ||
1854 | * Conversely, the "signal" command now consistently delivers the | |
1855 | requested signal to the current thread. GDB now asks for | |
1856 | confirmation if the program had stopped for a signal and the user | |
1857 | switched threads meanwhile. | |
1858 | ||
1859 | * "breakpoint always-inserted" modes "off" and "auto" merged. | |
1860 | ||
1861 | Now, when 'breakpoint always-inserted mode' is set to "off", GDB | |
1862 | won't remove breakpoints from the target until all threads stop, | |
1863 | even in non-stop mode. The "auto" mode has been removed, and "off" | |
1864 | is now the default mode. | |
1865 | ||
1866 | * New options | |
1867 | ||
1868 | set debug symbol-lookup | |
1869 | show debug symbol-lookup | |
1870 | Control display of debugging info regarding symbol lookup. | |
1871 | ||
1872 | * MI changes | |
1873 | ||
1874 | ** The -list-thread-groups command outputs an exit-code field for | |
1875 | inferiors that have exited. | |
1876 | ||
1877 | * New targets | |
1878 | ||
1879 | MIPS SDE mips*-sde*-elf* | |
1880 | ||
1881 | * Removed targets | |
1882 | ||
1883 | Support for these obsolete configurations has been removed. | |
1884 | ||
1885 | Alpha running OSF/1 (or Tru64) alpha*-*-osf* | |
1886 | SGI Irix-5.x mips-*-irix5* | |
1887 | SGI Irix-6.x mips-*-irix6* | |
1888 | VAX running (4.2 - 4.3 Reno) BSD vax-*-bsd* | |
1889 | VAX running Ultrix vax-*-ultrix* | |
1890 | ||
1891 | * The "dll-symbols" command, and its two aliases ("add-shared-symbol-files" | |
1892 | and "assf"), have been removed. Use the "sharedlibrary" command, or | |
1893 | its alias "share", instead. | |
1894 | ||
1895 | *** Changes in GDB 7.8 | |
1896 | ||
1897 | * New command line options | |
1898 | ||
1899 | -D data-directory | |
1900 | This is an alias for the --data-directory option. | |
1901 | ||
1902 | * GDB supports printing and modifying of variable length automatic arrays | |
1903 | as specified in ISO C99. | |
1904 | ||
1905 | * The ARM simulator now supports instruction level tracing | |
1906 | with or without disassembly. | |
1907 | ||
1908 | * Guile scripting | |
1909 | ||
1910 | GDB now has support for scripting using Guile. Whether this is | |
1911 | available is determined at configure time. | |
1912 | Guile version 2.0 or greater is required. | |
1913 | Guile version 2.0.9 is well tested, earlier 2.0 versions are not. | |
1914 | ||
1915 | * New commands (for set/show, see "New options" below) | |
1916 | ||
1917 | guile [code] | |
1918 | gu [code] | |
1919 | Invoke CODE by passing it to the Guile interpreter. | |
1920 | ||
1921 | guile-repl | |
1922 | gr | |
1923 | Start a Guile interactive prompt (or "repl" for "read-eval-print loop"). | |
1924 | ||
1925 | info auto-load guile-scripts [regexp] | |
1926 | Print the list of automatically loaded Guile scripts. | |
1927 | ||
1928 | * The source command is now capable of sourcing Guile scripts. | |
1929 | This feature is dependent on the debugger being built with Guile support. | |
1930 | ||
1931 | * New options | |
1932 | ||
1933 | set print symbol-loading (off|brief|full) | |
1934 | show print symbol-loading | |
1935 | Control whether to print informational messages when loading symbol | |
1936 | information for a file. The default is "full", but when debugging | |
1937 | programs with large numbers of shared libraries the amount of output | |
1938 | becomes less useful. | |
1939 | ||
1940 | set guile print-stack (none|message|full) | |
1941 | show guile print-stack | |
1942 | Show a stack trace when an error is encountered in a Guile script. | |
1943 | ||
1944 | set auto-load guile-scripts (on|off) | |
1945 | show auto-load guile-scripts | |
1946 | Control auto-loading of Guile script files. | |
1947 | ||
1948 | maint ada set ignore-descriptive-types (on|off) | |
1949 | maint ada show ignore-descriptive-types | |
1950 | Control whether the debugger should ignore descriptive types in Ada | |
1951 | programs. The default is not to ignore the descriptive types. See | |
1952 | the user manual for more details on descriptive types and the intended | |
1953 | usage of this option. | |
1954 | ||
1955 | set auto-connect-native-target | |
1956 | ||
1957 | Control whether GDB is allowed to automatically connect to the | |
1958 | native target for the run, attach, etc. commands when not connected | |
1959 | to any target yet. See also "target native" below. | |
1960 | ||
1961 | set record btrace replay-memory-access (read-only|read-write) | |
1962 | show record btrace replay-memory-access | |
1963 | Control what memory accesses are allowed during replay. | |
1964 | ||
1965 | maint set target-async (on|off) | |
1966 | maint show target-async | |
1967 | This controls whether GDB targets operate in synchronous or | |
1968 | asynchronous mode. Normally the default is asynchronous, if it is | |
1969 | available; but this can be changed to more easily debug problems | |
1970 | occurring only in synchronous mode. | |
1971 | ||
1972 | set mi-async (on|off) | |
1973 | show mi-async | |
1974 | Control whether MI asynchronous mode is preferred. This supersedes | |
1975 | "set target-async" of previous GDB versions. | |
1976 | ||
1977 | * "set target-async" is deprecated as a CLI option and is now an alias | |
1978 | for "set mi-async" (only puts MI into async mode). | |
1979 | ||
1980 | * Background execution commands (e.g., "c&", "s&", etc.) are now | |
1981 | possible ``out of the box'' if the target supports them. Previously | |
1982 | the user would need to explicitly enable the possibility with the | |
1983 | "set target-async on" command. | |
1984 | ||
1985 | * New features in the GDB remote stub, GDBserver | |
1986 | ||
1987 | ** New option --debug-format=option1[,option2,...] allows one to add | |
1988 | additional text to each output. At present only timestamps | |
1989 | are supported: --debug-format=timestamps. | |
1990 | Timestamps can also be turned on with the | |
1991 | "monitor set debug-format timestamps" command from GDB. | |
1992 | ||
1993 | * The 'record instruction-history' command now starts counting instructions | |
1994 | at one. This also affects the instruction ranges reported by the | |
1995 | 'record function-call-history' command when given the /i modifier. | |
1996 | ||
1997 | * The command 'record function-call-history' supports a new modifier '/c' to | |
1998 | indent the function names based on their call stack depth. | |
1999 | The fields for the '/i' and '/l' modifier have been reordered. | |
2000 | The source line range is now prefixed with 'at'. | |
2001 | The instruction range is now prefixed with 'inst'. | |
2002 | Both ranges are now printed as '<from>, <to>' to allow copy&paste to the | |
2003 | "record instruction-history" and "list" commands. | |
2004 | ||
2005 | * The ranges given as arguments to the 'record function-call-history' and | |
2006 | 'record instruction-history' commands are now inclusive. | |
2007 | ||
2008 | * The btrace record target now supports the 'record goto' command. | |
2009 | For locations inside the execution trace, the back trace is computed | |
2010 | based on the information stored in the execution trace. | |
2011 | ||
2012 | * The btrace record target supports limited reverse execution and replay. | |
2013 | The target does not record data and therefore does not allow reading | |
2014 | memory or registers. | |
2015 | ||
2016 | * The "catch syscall" command now works on s390*-linux* targets. | |
2017 | ||
2018 | * The "compare-sections" command is no longer specific to target | |
2019 | remote. It now works with all targets. | |
2020 | ||
2021 | * All native targets are now consistently called "native". | |
2022 | Consequently, the "target child", "target GNU", "target djgpp", | |
2023 | "target procfs" (Solaris/Irix/OSF/AIX) and "target darwin-child" | |
2024 | commands have been replaced with "target native". The QNX/NTO port | |
2025 | leaves the "procfs" target in place and adds a "native" target for | |
2026 | consistency with other ports. The impact on users should be minimal | |
2027 | as these commands previously either throwed an error, or were | |
2028 | no-ops. The target's name is visible in the output of the following | |
2029 | commands: "help target", "info target", "info files", "maint print | |
2030 | target-stack". | |
2031 | ||
2032 | * The "target native" command now connects to the native target. This | |
2033 | can be used to launch native programs even when "set | |
2034 | auto-connect-native-target" is set to off. | |
2035 | ||
2036 | * GDB now supports access to Intel MPX registers on GNU/Linux. | |
2037 | ||
2038 | * Support for Intel AVX-512 registers on GNU/Linux. | |
2039 | Support displaying and modifying Intel AVX-512 registers | |
2040 | $zmm0 - $zmm31 and $k0 - $k7 on GNU/Linux. | |
2041 | ||
2042 | * New remote packets | |
2043 | ||
2044 | qXfer:btrace:read's annex | |
2045 | The qXfer:btrace:read packet supports a new annex 'delta' to read | |
2046 | branch trace incrementally. | |
2047 | ||
2048 | * Python Scripting | |
2049 | ||
2050 | ** Valid Python operations on gdb.Value objects representing | |
2051 | structs/classes invoke the corresponding overloaded operators if | |
2052 | available. | |
2053 | ** New `Xmethods' feature in the Python API. Xmethods are | |
2054 | additional methods or replacements for existing methods of a C++ | |
2055 | class. This feature is useful for those cases where a method | |
2056 | defined in C++ source code could be inlined or optimized out by | |
2057 | the compiler, making it unavailable to GDB. | |
2058 | ||
2059 | * New targets | |
2060 | PowerPC64 GNU/Linux little-endian powerpc64le-*-linux* | |
2061 | ||
2062 | * The "dll-symbols" command, and its two aliases ("add-shared-symbol-files" | |
2063 | and "assf"), have been deprecated. Use the "sharedlibrary" command, or | |
2064 | its alias "share", instead. | |
2065 | ||
2066 | * The commands "set remotebaud" and "show remotebaud" are no longer | |
2067 | supported. Use "set serial baud" and "show serial baud" (respectively) | |
2068 | instead. | |
2069 | ||
2070 | * MI changes | |
2071 | ||
2072 | ** A new option "-gdb-set mi-async" replaces "-gdb-set | |
2073 | target-async". The latter is left as a deprecated alias of the | |
2074 | former for backward compatibility. If the target supports it, | |
2075 | CLI background execution commands are now always possible by | |
2076 | default, independently of whether the frontend stated a | |
2077 | preference for asynchronous execution with "-gdb-set mi-async". | |
2078 | Previously "-gdb-set target-async off" affected both MI execution | |
2079 | commands and CLI execution commands. | |
2080 | ||
2081 | *** Changes in GDB 7.7 | |
2082 | ||
2083 | * Improved support for process record-replay and reverse debugging on | |
2084 | arm*-linux* targets. Support for thumb32 and syscall instruction | |
2085 | recording has been added. | |
2086 | ||
2087 | * GDB now supports SystemTap SDT probes on AArch64 GNU/Linux. | |
2088 | ||
2089 | * GDB now supports Fission DWP file format version 2. | |
2090 | http://gcc.gnu.org/wiki/DebugFission | |
2091 | ||
2092 | * New convenience function "$_isvoid", to check whether an expression | |
2093 | is void. A void expression is an expression where the type of the | |
2094 | result is "void". For example, some convenience variables may be | |
2095 | "void" when evaluated (e.g., "$_exitcode" before the execution of | |
2096 | the program being debugged; or an undefined convenience variable). | |
2097 | Another example, when calling a function whose return type is | |
2098 | "void". | |
2099 | ||
2100 | * The "maintenance print objfiles" command now takes an optional regexp. | |
2101 | ||
2102 | * The "catch syscall" command now works on arm*-linux* targets. | |
2103 | ||
2104 | * GDB now consistently shows "<not saved>" when printing values of | |
2105 | registers the debug info indicates have not been saved in the frame | |
2106 | and there's nowhere to retrieve them from | |
2107 | (callee-saved/call-clobbered registers): | |
2108 | ||
2109 | (gdb) p $rax | |
2110 | $1 = <not saved> | |
2111 | ||
2112 | (gdb) info registers rax | |
2113 | rax <not saved> | |
2114 | ||
2115 | Before, the former would print "<optimized out>", and the latter | |
2116 | "*value not available*". | |
2117 | ||
2118 | * New script contrib/gdb-add-index.sh for adding .gdb_index sections | |
2119 | to binaries. | |
2120 | ||
2121 | * Python scripting | |
2122 | ||
2123 | ** Frame filters and frame decorators have been added. | |
2124 | ** Temporary breakpoints are now supported. | |
2125 | ** Line tables representation has been added. | |
2126 | ** New attribute 'parent_type' for gdb.Field objects. | |
2127 | ** gdb.Field objects can be used as subscripts on gdb.Value objects. | |
2128 | ** New attribute 'name' for gdb.Type objects. | |
2129 | ||
2130 | * New targets | |
2131 | ||
2132 | Nios II ELF nios2*-*-elf | |
2133 | Nios II GNU/Linux nios2*-*-linux | |
2134 | Texas Instruments MSP430 msp430*-*-elf | |
2135 | ||
2136 | * Removed native configurations | |
2137 | ||
2138 | Support for these a.out NetBSD and OpenBSD obsolete configurations has | |
2139 | been removed. ELF variants of these configurations are kept supported. | |
2140 | ||
2141 | arm*-*-netbsd* but arm*-*-netbsdelf* is kept supported. | |
2142 | i[34567]86-*-netbsd* but i[34567]86-*-netbsdelf* is kept supported. | |
2143 | i[34567]86-*-openbsd[0-2].* but i[34567]86-*-openbsd* is kept supported. | |
2144 | i[34567]86-*-openbsd3.[0-3] | |
2145 | m68*-*-netbsd* but m68*-*-netbsdelf* is kept supported. | |
2146 | sparc-*-netbsd* but sparc-*-netbsdelf* is kept supported. | |
2147 | vax-*-netbsd* but vax-*-netbsdelf* is kept supported. | |
2148 | ||
2149 | * New commands: | |
2150 | catch rethrow | |
2151 | Like "catch throw", but catches a re-thrown exception. | |
2152 | maint check-psymtabs | |
2153 | Renamed from old "maint check-symtabs". | |
2154 | maint check-symtabs | |
2155 | Perform consistency checks on symtabs. | |
2156 | maint expand-symtabs | |
2157 | Expand symtabs matching an optional regexp. | |
2158 | ||
2159 | show configuration | |
2160 | Display the details of GDB configure-time options. | |
2161 | ||
2162 | maint set|show per-command | |
2163 | maint set|show per-command space | |
2164 | maint set|show per-command time | |
2165 | maint set|show per-command symtab | |
2166 | Enable display of per-command gdb resource usage. | |
2167 | ||
2168 | remove-symbol-file FILENAME | |
2169 | remove-symbol-file -a ADDRESS | |
2170 | Remove a symbol file added via add-symbol-file. The file to remove | |
2171 | can be identified by its filename or by an address that lies within | |
2172 | the boundaries of this symbol file in memory. | |
2173 | ||
2174 | info exceptions | |
2175 | info exceptions REGEXP | |
2176 | Display the list of Ada exceptions defined in the program being | |
2177 | debugged. If provided, only the exceptions whose names match REGEXP | |
2178 | are listed. | |
2179 | ||
2180 | * New options | |
2181 | ||
2182 | set debug symfile off|on | |
2183 | show debug symfile | |
2184 | Control display of debugging info regarding reading symbol files and | |
2185 | symbol tables within those files | |
2186 | ||
2187 | set print raw frame-arguments | |
2188 | show print raw frame-arguments | |
2189 | Set/show whether to print frame arguments in raw mode, | |
2190 | disregarding any defined pretty-printers. | |
2191 | ||
2192 | set remote trace-status-packet | |
2193 | show remote trace-status-packet | |
2194 | Set/show the use of remote protocol qTStatus packet. | |
2195 | ||
2196 | set debug nios2 | |
2197 | show debug nios2 | |
2198 | Control display of debugging messages related to Nios II targets. | |
2199 | ||
2200 | set range-stepping | |
2201 | show range-stepping | |
2202 | Control whether target-assisted range stepping is enabled. | |
2203 | ||
2204 | set startup-with-shell | |
2205 | show startup-with-shell | |
2206 | Specifies whether Unix child processes are started via a shell or | |
2207 | directly. | |
2208 | ||
2209 | set code-cache | |
2210 | show code-cache | |
2211 | Use the target memory cache for accesses to the code segment. This | |
2212 | improves performance of remote debugging (particularly disassembly). | |
2213 | ||
2214 | * You can now use a literal value 'unlimited' for options that | |
2215 | interpret 0 or -1 as meaning "unlimited". E.g., "set | |
2216 | trace-buffer-size unlimited" is now an alias for "set | |
2217 | trace-buffer-size -1" and "set height unlimited" is now an alias for | |
2218 | "set height 0". | |
2219 | ||
2220 | * The "set debug symtab-create" debugging option of GDB has been changed to | |
2221 | accept a verbosity level. 0 means "off", 1 provides basic debugging | |
2222 | output, and values of 2 or greater provides more verbose output. | |
2223 | ||
2224 | * New command-line options | |
2225 | --configuration | |
2226 | Display the details of GDB configure-time options. | |
2227 | ||
2228 | * The command 'tsave' can now support new option '-ctf' to save trace | |
2229 | buffer in Common Trace Format. | |
2230 | ||
2231 | * Newly installed $prefix/bin/gcore acts as a shell interface for the | |
2232 | GDB command gcore. | |
2233 | ||
2234 | * GDB now implements the the C++ 'typeid' operator. | |
2235 | ||
2236 | * The new convenience variable $_exception holds the exception being | |
2237 | thrown or caught at an exception-related catchpoint. | |
2238 | ||
2239 | * The exception-related catchpoints, like "catch throw", now accept a | |
2240 | regular expression which can be used to filter exceptions by type. | |
2241 | ||
2242 | * The new convenience variable $_exitsignal is automatically set to | |
2243 | the terminating signal number when the program being debugged dies | |
2244 | due to an uncaught signal. | |
2245 | ||
2246 | * MI changes | |
2247 | ||
2248 | ** All MI commands now accept an optional "--language" option. | |
2249 | Support for this feature can be verified by using the "-list-features" | |
2250 | command, which should contain "language-option". | |
2251 | ||
2252 | ** The new command -info-gdb-mi-command allows the user to determine | |
2253 | whether a GDB/MI command is supported or not. | |
2254 | ||
2255 | ** The "^error" result record returned when trying to execute an undefined | |
2256 | GDB/MI command now provides a variable named "code" whose content is the | |
2257 | "undefined-command" error code. Support for this feature can be verified | |
2258 | by using the "-list-features" command, which should contain | |
2259 | "undefined-command-error-code". | |
2260 | ||
2261 | ** The -trace-save MI command can optionally save trace buffer in Common | |
2262 | Trace Format now. | |
2263 | ||
2264 | ** The new command -dprintf-insert sets a dynamic printf breakpoint. | |
2265 | ||
2266 | ** The command -data-list-register-values now accepts an optional | |
2267 | "--skip-unavailable" option. When used, only the available registers | |
2268 | are displayed. | |
2269 | ||
2270 | ** The new command -trace-frame-collected dumps collected variables, | |
2271 | computed expressions, tvars, memory and registers in a traceframe. | |
2272 | ||
2273 | ** The commands -stack-list-locals, -stack-list-arguments and | |
2274 | -stack-list-variables now accept an option "--skip-unavailable". | |
2275 | When used, only the available locals or arguments are displayed. | |
2276 | ||
2277 | ** The -exec-run command now accepts an optional "--start" option. | |
2278 | When used, the command follows the same semantics as the "start" | |
2279 | command, stopping the program's execution at the start of its | |
2280 | main subprogram. Support for this feature can be verified using | |
2281 | the "-list-features" command, which should contain | |
2282 | "exec-run-start-option". | |
2283 | ||
2284 | ** The new commands -catch-assert and -catch-exceptions insert | |
2285 | catchpoints stopping the program when Ada exceptions are raised. | |
2286 | ||
2287 | ** The new command -info-ada-exceptions provides the equivalent of | |
2288 | the new "info exceptions" command. | |
2289 | ||
2290 | * New system-wide configuration scripts | |
2291 | A GDB installation now provides scripts suitable for use as system-wide | |
2292 | configuration scripts for the following systems: | |
2293 | ** ElinOS | |
2294 | ** Wind River Linux | |
2295 | ||
2296 | * GDB now supports target-assigned range stepping with remote targets. | |
2297 | This improves the performance of stepping source lines by reducing | |
2298 | the number of control packets from/to GDB. See "New remote packets" | |
2299 | below. | |
2300 | ||
2301 | * GDB now understands the element 'tvar' in the XML traceframe info. | |
2302 | It has the id of the collected trace state variables. | |
2303 | ||
2304 | * On S/390 targets that provide the transactional-execution feature, | |
2305 | the program interruption transaction diagnostic block (TDB) is now | |
2306 | represented as a number of additional "registers" in GDB. | |
2307 | ||
2308 | * New remote packets | |
2309 | ||
2310 | vCont;r | |
2311 | ||
2312 | The vCont packet supports a new 'r' action, that tells the remote | |
2313 | stub to step through an address range itself, without GDB | |
2314 | involvemement at each single-step. | |
2315 | ||
2316 | qXfer:libraries-svr4:read's annex | |
2317 | The previously unused annex of the qXfer:libraries-svr4:read packet | |
2318 | is now used to support passing an argument list. The remote stub | |
2319 | reports support for this argument list to GDB's qSupported query. | |
2320 | The defined arguments are "start" and "prev", used to reduce work | |
2321 | necessary for library list updating, resulting in significant | |
2322 | speedup. | |
2323 | ||
2324 | * New features in the GDB remote stub, GDBserver | |
2325 | ||
2326 | ** GDBserver now supports target-assisted range stepping. Currently | |
2327 | enabled on x86/x86_64 GNU/Linux targets. | |
2328 | ||
2329 | ** GDBserver now adds element 'tvar' in the XML in the reply to | |
2330 | 'qXfer:traceframe-info:read'. It has the id of the collected | |
2331 | trace state variables. | |
2332 | ||
2333 | ** GDBserver now supports hardware watchpoints on the MIPS GNU/Linux | |
2334 | target. | |
2335 | ||
2336 | * New 'z' formatter for printing and examining memory, this displays the | |
2337 | value as hexadecimal zero padded on the left to the size of the type. | |
2338 | ||
2339 | * GDB can now use Windows x64 unwinding data. | |
2340 | ||
2341 | * The "set remotebaud" command has been replaced by "set serial baud". | |
2342 | Similarly, "show remotebaud" has been replaced by "show serial baud". | |
2343 | The "set remotebaud" and "show remotebaud" commands are still available | |
2344 | to provide backward compatibility with older versions of GDB. | |
2345 | ||
2346 | *** Changes in GDB 7.6 | |
2347 | ||
2348 | * Target record has been renamed to record-full. | |
2349 | Record/replay is now enabled with the "record full" command. | |
2350 | This also affects settings that are associated with full record/replay | |
2351 | that have been moved from "set/show record" to "set/show record full": | |
2352 | ||
2353 | set|show record full insn-number-max | |
2354 | set|show record full stop-at-limit | |
2355 | set|show record full memory-query | |
2356 | ||
2357 | * A new record target "record-btrace" has been added. The new target | |
2358 | uses hardware support to record the control-flow of a process. It | |
2359 | does not support replaying the execution, but it implements the | |
2360 | below new commands for investigating the recorded execution log. | |
2361 | This new recording method can be enabled using: | |
2362 | ||
2363 | record btrace | |
2364 | ||
2365 | The "record-btrace" target is only available on Intel Atom processors | |
2366 | and requires a Linux kernel 2.6.32 or later. | |
2367 | ||
2368 | * Two new commands have been added for record/replay to give information | |
2369 | about the recorded execution without having to replay the execution. | |
2370 | The commands are only supported by "record btrace". | |
2371 | ||
2372 | record instruction-history prints the execution history at | |
2373 | instruction granularity | |
2374 | ||
2375 | record function-call-history prints the execution history at | |
2376 | function granularity | |
2377 | ||
2378 | * New native configurations | |
2379 | ||
2380 | ARM AArch64 GNU/Linux aarch64*-*-linux-gnu | |
2381 | FreeBSD/powerpc powerpc*-*-freebsd | |
2382 | x86_64/Cygwin x86_64-*-cygwin* | |
2383 | Tilera TILE-Gx GNU/Linux tilegx*-*-linux-gnu | |
2384 | ||
2385 | * New targets | |
2386 | ||
2387 | ARM AArch64 aarch64*-*-elf | |
2388 | ARM AArch64 GNU/Linux aarch64*-*-linux | |
2389 | Lynx 178 PowerPC powerpc-*-lynx*178 | |
2390 | x86_64/Cygwin x86_64-*-cygwin* | |
2391 | Tilera TILE-Gx GNU/Linux tilegx*-*-linux | |
2392 | ||
2393 | * If the configured location of system.gdbinit file (as given by the | |
2394 | --with-system-gdbinit option at configure time) is in the | |
2395 | data-directory (as specified by --with-gdb-datadir at configure | |
2396 | time) or in one of its subdirectories, then GDB will look for the | |
2397 | system-wide init file in the directory specified by the | |
2398 | --data-directory command-line option. | |
2399 | ||
2400 | * New command line options: | |
2401 | ||
2402 | -nh Disables auto-loading of ~/.gdbinit, but still executes all the | |
2403 | other initialization files, unlike -nx which disables all of them. | |
2404 | ||
2405 | * Removed command line options | |
2406 | ||
2407 | -epoch This was used by the gdb mode in Epoch, an ancient fork of | |
2408 | Emacs. | |
2409 | ||
2410 | * The 'ptype' and 'whatis' commands now accept an argument to control | |
2411 | type formatting. | |
2412 | ||
2413 | * 'info proc' now works on some core files. | |
2414 | ||
2415 | * Python scripting | |
2416 | ||
2417 | ** Vectors can be created with gdb.Type.vector. | |
2418 | ||
2419 | ** Python's atexit.register now works in GDB. | |
2420 | ||
2421 | ** Types can be pretty-printed via a Python API. | |
2422 | ||
2423 | ** Python 3 is now supported (in addition to Python 2.4 or later) | |
2424 | ||
2425 | ** New class gdb.Architecture exposes GDB's internal representation | |
2426 | of architecture in the Python API. | |
2427 | ||
2428 | ** New method Frame.architecture returns the gdb.Architecture object | |
2429 | corresponding to the frame's architecture. | |
2430 | ||
2431 | * New Python-based convenience functions: | |
2432 | ||
2433 | ** $_memeq(buf1, buf2, length) | |
2434 | ** $_streq(str1, str2) | |
2435 | ** $_strlen(str) | |
2436 | ** $_regex(str, regex) | |
2437 | ||
2438 | * The 'cd' command now defaults to using '~' (the home directory) if not | |
2439 | given an argument. | |
2440 | ||
2441 | * The C++ ABI now defaults to the GNU v3 ABI. This has been the | |
2442 | default for GCC since November 2000. | |
2443 | ||
2444 | * The command 'forward-search' can now be abbreviated as 'fo'. | |
2445 | ||
2446 | * The command 'info tracepoints' can now display 'installed on target' | |
2447 | or 'not installed on target' for each non-pending location of tracepoint. | |
2448 | ||
2449 | * New configure options | |
2450 | ||
2451 | --enable-libmcheck/--disable-libmcheck | |
2452 | By default, development versions are built with -lmcheck on hosts | |
2453 | that support it, in order to help track memory corruption issues. | |
2454 | Release versions, on the other hand, are built without -lmcheck | |
2455 | by default. The --enable-libmcheck/--disable-libmcheck configure | |
2456 | options allow the user to override that default. | |
2457 | --with-babeltrace/--with-babeltrace-include/--with-babeltrace-lib | |
2458 | This configure option allows the user to build GDB with | |
2459 | libbabeltrace using which GDB can read Common Trace Format data. | |
2460 | ||
2461 | * New commands (for set/show, see "New options" below) | |
2462 | ||
2463 | catch signal | |
2464 | Catch signals. This is similar to "handle", but allows commands and | |
2465 | conditions to be attached. | |
2466 | ||
2467 | maint info bfds | |
2468 | List the BFDs known to GDB. | |
2469 | ||
2470 | python-interactive [command] | |
2471 | pi [command] | |
2472 | Start a Python interactive prompt, or evaluate the optional command | |
2473 | and print the result of expressions. | |
2474 | ||
2475 | py [command] | |
2476 | "py" is a new alias for "python". | |
2477 | ||
2478 | enable type-printer [name]... | |
2479 | disable type-printer [name]... | |
2480 | Enable or disable type printers. | |
2481 | ||
2482 | * Removed commands | |
2483 | ||
2484 | ** For the Renesas Super-H architecture, the "regs" command has been removed | |
2485 | (has been deprecated in GDB 7.5), and "info all-registers" should be used | |
2486 | instead. | |
2487 | ||
2488 | * New options | |
2489 | ||
2490 | set print type methods (on|off) | |
2491 | show print type methods | |
2492 | Control whether method declarations are displayed by "ptype". | |
2493 | The default is to show them. | |
2494 | ||
2495 | set print type typedefs (on|off) | |
2496 | show print type typedefs | |
2497 | Control whether typedef definitions are displayed by "ptype". | |
2498 | The default is to show them. | |
2499 | ||
2500 | set filename-display basename|relative|absolute | |
2501 | show filename-display | |
2502 | Control the way in which filenames is displayed. | |
2503 | The default is "relative", which preserves previous behavior. | |
2504 | ||
2505 | set trace-buffer-size | |
2506 | show trace-buffer-size | |
2507 | Request target to change the size of trace buffer. | |
2508 | ||
2509 | set remote trace-buffer-size-packet auto|on|off | |
2510 | show remote trace-buffer-size-packet | |
2511 | Control the use of the remote protocol `QTBuffer:size' packet. | |
2512 | ||
2513 | set debug aarch64 | |
2514 | show debug aarch64 | |
2515 | Control display of debugging messages related to ARM AArch64. | |
2516 | The default is off. | |
2517 | ||
2518 | set debug coff-pe-read | |
2519 | show debug coff-pe-read | |
2520 | Control display of debugging messages related to reading of COFF/PE | |
2521 | exported symbols. | |
2522 | ||
2523 | set debug mach-o | |
2524 | show debug mach-o | |
2525 | Control display of debugging messages related to Mach-O symbols | |
2526 | processing. | |
2527 | ||
2528 | set debug notification | |
2529 | show debug notification | |
2530 | Control display of debugging info for async remote notification. | |
2531 | ||
2532 | * MI changes | |
2533 | ||
2534 | ** Command parameter changes are now notified using new async record | |
2535 | "=cmd-param-changed". | |
2536 | ** Trace frame changes caused by command "tfind" are now notified using | |
2537 | new async record "=traceframe-changed". | |
2538 | ** The creation, deletion and modification of trace state variables | |
2539 | are now notified using new async records "=tsv-created", | |
2540 | "=tsv-deleted" and "=tsv-modified". | |
2541 | ** The start and stop of process record are now notified using new | |
2542 | async record "=record-started" and "=record-stopped". | |
2543 | ** Memory changes are now notified using new async record | |
2544 | "=memory-changed". | |
2545 | ** The data-disassemble command response will include a "fullname" field | |
2546 | containing the absolute file name when source has been requested. | |
2547 | ** New optional parameter COUNT added to the "-data-write-memory-bytes" | |
2548 | command, to allow pattern filling of memory areas. | |
2549 | ** New commands "-catch-load"/"-catch-unload" added for intercepting | |
2550 | library load/unload events. | |
2551 | ** The response to breakpoint commands and breakpoint async records | |
2552 | includes an "installed" field containing a boolean state about each | |
2553 | non-pending tracepoint location is whether installed on target or not. | |
2554 | ** Output of the "-trace-status" command includes a "trace-file" field | |
2555 | containing the name of the trace file being examined. This field is | |
2556 | optional, and only present when examining a trace file. | |
2557 | ** The "fullname" field is now always present along with the "file" field, | |
2558 | even if the file cannot be found by GDB. | |
2559 | ||
2560 | * GDB now supports the "mini debuginfo" section, .gnu_debugdata. | |
2561 | You must have the LZMA library available when configuring GDB for this | |
2562 | feature to be enabled. For more information, see: | |
2563 | http://fedoraproject.org/wiki/Features/MiniDebugInfo | |
2564 | ||
2565 | * New remote packets | |
2566 | ||
2567 | QTBuffer:size | |
2568 | Set the size of trace buffer. The remote stub reports support for this | |
2569 | packet to gdb's qSupported query. | |
2570 | ||
2571 | Qbtrace:bts | |
2572 | Enable Branch Trace Store (BTS)-based branch tracing for the current | |
2573 | thread. The remote stub reports support for this packet to gdb's | |
2574 | qSupported query. | |
2575 | ||
2576 | Qbtrace:off | |
2577 | Disable branch tracing for the current thread. The remote stub reports | |
2578 | support for this packet to gdb's qSupported query. | |
2579 | ||
2580 | qXfer:btrace:read | |
2581 | Read the traced branches for the current thread. The remote stub | |
2582 | reports support for this packet to gdb's qSupported query. | |
2583 | ||
2584 | *** Changes in GDB 7.5 | |
2585 | ||
2586 | * GDB now supports x32 ABI. Visit <http://sites.google.com/site/x32abi/> | |
2587 | for more x32 ABI info. | |
2588 | ||
2589 | * GDB now supports access to MIPS DSP registers on Linux targets. | |
2590 | ||
2591 | * GDB now supports debugging microMIPS binaries. | |
2592 | ||
2593 | * The "info os" command on GNU/Linux can now display information on | |
2594 | several new classes of objects managed by the operating system: | |
2595 | "info os procgroups" lists process groups | |
2596 | "info os files" lists file descriptors | |
2597 | "info os sockets" lists internet-domain sockets | |
2598 | "info os shm" lists shared-memory regions | |
2599 | "info os semaphores" lists semaphores | |
2600 | "info os msg" lists message queues | |
2601 | "info os modules" lists loaded kernel modules | |
2602 | ||
2603 | * GDB now has support for SDT (Static Defined Tracing) probes. Currently, | |
2604 | the only implemented backend is for SystemTap probes (<sys/sdt.h>). You | |
2605 | can set a breakpoint using the new "-probe, "-pstap" or "-probe-stap" | |
2606 | options and inspect the probe arguments using the new $_probe_arg family | |
2607 | of convenience variables. You can obtain more information about SystemTap | |
2608 | in <http://sourceware.org/systemtap/>. | |
2609 | ||
2610 | * GDB now supports reversible debugging on ARM, it allows you to | |
2611 | debug basic ARM and THUMB instructions, and provides | |
2612 | record/replay support. | |
2613 | ||
2614 | * The option "symbol-reloading" has been deleted as it is no longer used. | |
2615 | ||
2616 | * Python scripting | |
2617 | ||
2618 | ** GDB commands implemented in Python can now be put in command class | |
2619 | "gdb.COMMAND_USER". | |
2620 | ||
2621 | ** The "maint set python print-stack on|off" is now deleted. | |
2622 | ||
2623 | ** A new class, gdb.printing.FlagEnumerationPrinter, can be used to | |
2624 | apply "flag enum"-style pretty-printing to any enum. | |
2625 | ||
2626 | ** gdb.lookup_symbol can now work when there is no current frame. | |
2627 | ||
2628 | ** gdb.Symbol now has a 'line' attribute, holding the line number in | |
2629 | the source at which the symbol was defined. | |
2630 | ||
2631 | ** gdb.Symbol now has the new attribute 'needs_frame' and the new | |
2632 | method 'value'. The former indicates whether the symbol needs a | |
2633 | frame in order to compute its value, and the latter computes the | |
2634 | symbol's value. | |
2635 | ||
2636 | ** A new method 'referenced_value' on gdb.Value objects which can | |
2637 | dereference pointer as well as C++ reference values. | |
2638 | ||
2639 | ** New methods 'global_block' and 'static_block' on gdb.Symtab objects | |
2640 | which return the global and static blocks (as gdb.Block objects), | |
2641 | of the underlying symbol table, respectively. | |
2642 | ||
2643 | ** New function gdb.find_pc_line which returns the gdb.Symtab_and_line | |
2644 | object associated with a PC value. | |
2645 | ||
2646 | ** gdb.Symtab_and_line has new attribute 'last' which holds the end | |
2647 | of the address range occupied by code for the current source line. | |
2648 | ||
2649 | * Go language support. | |
2650 | GDB now supports debugging programs written in the Go programming | |
2651 | language. | |
2652 | ||
2653 | * GDBserver now supports stdio connections. | |
2654 | E.g. (gdb) target remote | ssh myhost gdbserver - hello | |
2655 | ||
2656 | * The binary "gdbtui" can no longer be built or installed. | |
2657 | Use "gdb -tui" instead. | |
2658 | ||
2659 | * GDB will now print "flag" enums specially. A flag enum is one where | |
2660 | all the enumerator values have no bits in common when pairwise | |
2661 | "and"ed. When printing a value whose type is a flag enum, GDB will | |
2662 | show all the constants, e.g., for enum E { ONE = 1, TWO = 2}: | |
2663 | (gdb) print (enum E) 3 | |
2664 | $1 = (ONE | TWO) | |
2665 | ||
2666 | * The filename part of a linespec will now match trailing components | |
2667 | of a source file name. For example, "break gcc/expr.c:1000" will | |
2668 | now set a breakpoint in build/gcc/expr.c, but not | |
2669 | build/libcpp/expr.c. | |
2670 | ||
2671 | * The "info proc" and "generate-core-file" commands will now also | |
2672 | work on remote targets connected to GDBserver on Linux. | |
2673 | ||
2674 | * The command "info catch" has been removed. It has been disabled | |
2675 | since December 2007. | |
2676 | ||
2677 | * The "catch exception" and "catch assert" commands now accept | |
2678 | a condition at the end of the command, much like the "break" | |
2679 | command does. For instance: | |
2680 | ||
2681 | (gdb) catch exception Constraint_Error if Barrier = True | |
2682 | ||
2683 | Previously, it was possible to add a condition to such catchpoints, | |
2684 | but it had to be done as a second step, after the catchpoint had been | |
2685 | created, using the "condition" command. | |
2686 | ||
2687 | * The "info static-tracepoint-marker" command will now also work on | |
2688 | native Linux targets with in-process agent. | |
2689 | ||
2690 | * GDB can now set breakpoints on inlined functions. | |
2691 | ||
2692 | * The .gdb_index section has been updated to include symbols for | |
2693 | inlined functions. GDB will ignore older .gdb_index sections by | |
2694 | default, which could cause symbol files to be loaded more slowly | |
2695 | until their .gdb_index sections can be recreated. The new command | |
2696 | "set use-deprecated-index-sections on" will cause GDB to use any older | |
2697 | .gdb_index sections it finds. This will restore performance, but the | |
2698 | ability to set breakpoints on inlined functions will be lost in symbol | |
2699 | files with older .gdb_index sections. | |
2700 | ||
2701 | The .gdb_index section has also been updated to record more information | |
2702 | about each symbol. This speeds up the "info variables", "info functions" | |
2703 | and "info types" commands when used with programs having the .gdb_index | |
2704 | section, as well as speeding up debugging with shared libraries using | |
2705 | the .gdb_index section. | |
2706 | ||
2707 | * Ada support for GDB/MI Variable Objects has been added. | |
2708 | ||
2709 | * GDB can now support 'breakpoint always-inserted mode' in 'record' | |
2710 | target. | |
2711 | ||
2712 | * MI changes | |
2713 | ||
2714 | ** New command -info-os is the MI equivalent of "info os". | |
2715 | ||
2716 | ** Output logs ("set logging" and related) now include MI output. | |
2717 | ||
2718 | * New commands | |
2719 | ||
2720 | ** "set use-deprecated-index-sections on|off" | |
2721 | "show use-deprecated-index-sections on|off" | |
2722 | Controls the use of deprecated .gdb_index sections. | |
2723 | ||
2724 | ** "catch load" and "catch unload" can be used to stop when a shared | |
2725 | library is loaded or unloaded, respectively. | |
2726 | ||
2727 | ** "enable count" can be used to auto-disable a breakpoint after | |
2728 | several hits. | |
2729 | ||
2730 | ** "info vtbl" can be used to show the virtual method tables for | |
2731 | C++ and Java objects. | |
2732 | ||
2733 | ** "explore" and its sub commands "explore value" and "explore type" | |
2734 | can be used to recursively explore values and types of | |
2735 | expressions. These commands are available only if GDB is | |
2736 | configured with '--with-python'. | |
2737 | ||
2738 | ** "info auto-load" shows status of all kinds of auto-loaded files, | |
2739 | "info auto-load gdb-scripts" shows status of auto-loading GDB canned | |
2740 | sequences of commands files, "info auto-load python-scripts" | |
2741 | shows status of auto-loading Python script files, | |
2742 | "info auto-load local-gdbinit" shows status of loading init file | |
2743 | (.gdbinit) from current directory and "info auto-load libthread-db" shows | |
2744 | status of inferior specific thread debugging shared library loading. | |
2745 | ||
2746 | ** "info auto-load-scripts", "set auto-load-scripts on|off" | |
2747 | and "show auto-load-scripts" commands have been deprecated, use their | |
2748 | "info auto-load python-scripts", "set auto-load python-scripts on|off" | |
2749 | and "show auto-load python-scripts" counterparts instead. | |
2750 | ||
2751 | ** "dprintf location,format,args..." creates a dynamic printf, which | |
2752 | is basically a breakpoint that does a printf and immediately | |
2753 | resumes your program's execution, so it is like a printf that you | |
2754 | can insert dynamically at runtime instead of at compiletime. | |
2755 | ||
2756 | ** "set print symbol" | |
2757 | "show print symbol" | |
2758 | Controls whether GDB attempts to display the symbol, if any, | |
2759 | corresponding to addresses it prints. This defaults to "on", but | |
2760 | you can set it to "off" to restore GDB's previous behavior. | |
2761 | ||
2762 | * Deprecated commands | |
2763 | ||
2764 | ** For the Renesas Super-H architecture, the "regs" command has been | |
2765 | deprecated, and "info all-registers" should be used instead. | |
2766 | ||
2767 | * New targets | |
2768 | ||
2769 | Renesas RL78 rl78-*-elf | |
2770 | HP OpenVMS ia64 ia64-hp-openvms* | |
2771 | ||
2772 | * GDBserver supports evaluation of breakpoint conditions. When | |
2773 | support is advertised by GDBserver, GDB may be told to send the | |
2774 | breakpoint conditions in bytecode form to GDBserver. GDBserver | |
2775 | will only report the breakpoint trigger to GDB when its condition | |
2776 | evaluates to true. | |
2777 | ||
2778 | * New options | |
2779 | ||
2780 | set mips compression | |
2781 | show mips compression | |
2782 | Select the compressed ISA encoding used in functions that have no symbol | |
2783 | information available. The encoding can be set to either of: | |
2784 | mips16 | |
2785 | micromips | |
2786 | and is updated automatically from ELF file flags if available. | |
2787 | ||
2788 | set breakpoint condition-evaluation | |
2789 | show breakpoint condition-evaluation | |
2790 | Control whether breakpoint conditions are evaluated by GDB ("host") or by | |
2791 | GDBserver ("target"). Default option "auto" chooses the most efficient | |
2792 | available mode. | |
2793 | This option can improve debugger efficiency depending on the speed of the | |
2794 | target. | |
2795 | ||
2796 | set auto-load off | |
2797 | Disable auto-loading globally. | |
2798 | ||
2799 | show auto-load | |
2800 | Show auto-loading setting of all kinds of auto-loaded files. | |
2801 | ||
2802 | set auto-load gdb-scripts on|off | |
2803 | show auto-load gdb-scripts | |
2804 | Control auto-loading of GDB canned sequences of commands files. | |
2805 | ||
2806 | set auto-load python-scripts on|off | |
2807 | show auto-load python-scripts | |
2808 | Control auto-loading of Python script files. | |
2809 | ||
2810 | set auto-load local-gdbinit on|off | |
2811 | show auto-load local-gdbinit | |
2812 | Control loading of init file (.gdbinit) from current directory. | |
2813 | ||
2814 | set auto-load libthread-db on|off | |
2815 | show auto-load libthread-db | |
2816 | Control auto-loading of inferior specific thread debugging shared library. | |
2817 | ||
2818 | set auto-load scripts-directory <dir1>[:<dir2>...] | |
2819 | show auto-load scripts-directory | |
2820 | Set a list of directories from which to load auto-loaded scripts. | |
2821 | Automatically loaded Python scripts and GDB scripts are located in one | |
2822 | of the directories listed by this option. | |
2823 | The delimiter (':' above) may differ according to the host platform. | |
2824 | ||
2825 | set auto-load safe-path <dir1>[:<dir2>...] | |
2826 | show auto-load safe-path | |
2827 | Set a list of directories from which it is safe to auto-load files. | |
2828 | The delimiter (':' above) may differ according to the host platform. | |
2829 | ||
2830 | set debug auto-load on|off | |
2831 | show debug auto-load | |
2832 | Control display of debugging info for auto-loading the files above. | |
2833 | ||
2834 | set dprintf-style gdb|call|agent | |
2835 | show dprintf-style | |
2836 | Control the way in which a dynamic printf is performed; "gdb" | |
2837 | requests a GDB printf command, while "call" causes dprintf to call a | |
2838 | function in the inferior. "agent" requests that the target agent | |
2839 | (such as GDBserver) do the printing. | |
2840 | ||
2841 | set dprintf-function <expr> | |
2842 | show dprintf-function | |
2843 | set dprintf-channel <expr> | |
2844 | show dprintf-channel | |
2845 | Set the function and optional first argument to the call when using | |
2846 | the "call" style of dynamic printf. | |
2847 | ||
2848 | set disconnected-dprintf on|off | |
2849 | show disconnected-dprintf | |
2850 | Control whether agent-style dynamic printfs continue to be in effect | |
2851 | after GDB disconnects. | |
2852 | ||
2853 | * New configure options | |
2854 | ||
2855 | --with-auto-load-dir | |
2856 | Configure default value for the 'set auto-load scripts-directory' | |
2857 | setting above. It defaults to '$debugdir:$datadir/auto-load', | |
2858 | $debugdir representing global debugging info directories (available | |
2859 | via 'show debug-file-directory') and $datadir representing GDB's data | |
2860 | directory (available via 'show data-directory'). | |
2861 | ||
2862 | --with-auto-load-safe-path | |
2863 | Configure default value for the 'set auto-load safe-path' setting | |
2864 | above. It defaults to the --with-auto-load-dir setting. | |
2865 | ||
2866 | --without-auto-load-safe-path | |
2867 | Set 'set auto-load safe-path' to '/', effectively disabling this | |
2868 | security feature. | |
2869 | ||
2870 | * New remote packets | |
2871 | ||
2872 | z0/z1 conditional breakpoints extension | |
2873 | ||
2874 | The z0/z1 breakpoint insertion packets have been extended to carry | |
2875 | a list of conditional expressions over to the remote stub depending on the | |
2876 | condition evaluation mode. The use of this extension can be controlled | |
2877 | via the "set remote conditional-breakpoints-packet" command. | |
2878 | ||
2879 | QProgramSignals: | |
2880 | ||
2881 | Specify the signals which the remote stub may pass to the debugged | |
2882 | program without GDB involvement. | |
2883 | ||
2884 | * New command line options | |
2885 | ||
2886 | --init-command=FILE, -ix Like --command, -x but execute it | |
2887 | before loading inferior. | |
2888 | --init-eval-command=COMMAND, -iex Like --eval-command=COMMAND, -ex but | |
2889 | execute it before loading inferior. | |
2890 | ||
2891 | *** Changes in GDB 7.4 | |
2892 | ||
2893 | * GDB now handles ambiguous linespecs more consistently; the existing | |
2894 | FILE:LINE support has been expanded to other types of linespecs. A | |
2895 | breakpoint will now be set on all matching locations in all | |
2896 | inferiors, and locations will be added or removed according to | |
2897 | inferior changes. | |
2898 | ||
2899 | * GDB now allows you to skip uninteresting functions and files when | |
2900 | stepping with the "skip function" and "skip file" commands. | |
2901 | ||
2902 | * GDB has two new commands: "set remote hardware-watchpoint-length-limit" | |
2903 | and "show remote hardware-watchpoint-length-limit". These allows to | |
2904 | set or show the maximum length limit (in bytes) of a remote | |
2905 | target hardware watchpoint. | |
2906 | ||
2907 | This allows e.g. to use "unlimited" hardware watchpoints with the | |
2908 | gdbserver integrated in Valgrind version >= 3.7.0. Such Valgrind | |
2909 | watchpoints are slower than real hardware watchpoints but are | |
2910 | significantly faster than gdb software watchpoints. | |
2911 | ||
2912 | * Python scripting | |
2913 | ||
2914 | ** The register_pretty_printer function in module gdb.printing now takes | |
2915 | an optional `replace' argument. If True, the new printer replaces any | |
2916 | existing one. | |
2917 | ||
2918 | ** The "maint set python print-stack on|off" command has been | |
2919 | deprecated and will be deleted in GDB 7.5. | |
2920 | A new command: "set python print-stack none|full|message" has | |
2921 | replaced it. Additionally, the default for "print-stack" is | |
2922 | now "message", which just prints the error message without | |
2923 | the stack trace. | |
2924 | ||
2925 | ** A prompt substitution hook (prompt_hook) is now available to the | |
2926 | Python API. | |
2927 | ||
2928 | ** A new Python module, gdb.prompt has been added to the GDB Python | |
2929 | modules library. This module provides functionality for | |
2930 | escape sequences in prompts (used by set/show | |
2931 | extended-prompt). These escape sequences are replaced by their | |
2932 | corresponding value. | |
2933 | ||
2934 | ** Python commands and convenience-functions located in | |
2935 | 'data-directory'/python/gdb/command and | |
2936 | 'data-directory'/python/gdb/function are now automatically loaded | |
2937 | on GDB start-up. | |
2938 | ||
2939 | ** Blocks now provide four new attributes. global_block and | |
2940 | static_block will return the global and static blocks | |
2941 | respectively. is_static and is_global are boolean attributes | |
2942 | that indicate if the block is one of those two types. | |
2943 | ||
2944 | ** Symbols now provide the "type" attribute, the type of the symbol. | |
2945 | ||
2946 | ** The "gdb.breakpoint" function has been deprecated in favor of | |
2947 | "gdb.breakpoints". | |
2948 | ||
2949 | ** A new class "gdb.FinishBreakpoint" is provided to catch the return | |
2950 | of a function. This class is based on the "finish" command | |
2951 | available in the CLI. | |
2952 | ||
2953 | ** Type objects for struct and union types now allow access to | |
2954 | the fields using standard Python dictionary (mapping) methods. | |
2955 | For example, "some_type['myfield']" now works, as does | |
2956 | "some_type.items()". | |
2957 | ||
2958 | ** A new event "gdb.new_objfile" has been added, triggered by loading a | |
2959 | new object file. | |
2960 | ||
2961 | ** A new function, "deep_items" has been added to the gdb.types | |
2962 | module in the GDB Python modules library. This function returns | |
2963 | an iterator over the fields of a struct or union type. Unlike | |
2964 | the standard Python "iteritems" method, it will recursively traverse | |
2965 | any anonymous fields. | |
2966 | ||
2967 | * MI changes | |
2968 | ||
2969 | ** "*stopped" events can report several new "reason"s, such as | |
2970 | "solib-event". | |
2971 | ||
2972 | ** Breakpoint changes are now notified using new async records, like | |
2973 | "=breakpoint-modified". | |
2974 | ||
2975 | ** New command -ada-task-info. | |
2976 | ||
2977 | * libthread-db-search-path now supports two special values: $sdir and $pdir. | |
2978 | $sdir specifies the default system locations of shared libraries. | |
2979 | $pdir specifies the directory where the libpthread used by the application | |
2980 | lives. | |
2981 | ||
2982 | GDB no longer looks in $sdir and $pdir after it has searched the directories | |
2983 | mentioned in libthread-db-search-path. If you want to search those | |
2984 | directories, they must be specified in libthread-db-search-path. | |
2985 | The default value of libthread-db-search-path on GNU/Linux and Solaris | |
2986 | systems is now "$sdir:$pdir". | |
2987 | ||
2988 | $pdir is not supported by gdbserver, it is currently ignored. | |
2989 | $sdir is supported by gdbserver. | |
2990 | ||
2991 | * New configure option --with-iconv-bin. | |
2992 | When using the internationalization support like the one in the GNU C | |
2993 | library, GDB will invoke the "iconv" program to get a list of supported | |
2994 | character sets. If this program lives in a non-standard location, one can | |
2995 | use this option to specify where to find it. | |
2996 | ||
2997 | * When natively debugging programs on PowerPC BookE processors running | |
2998 | a Linux kernel version 2.6.34 or later, GDB supports masked hardware | |
2999 | watchpoints, which specify a mask in addition to an address to watch. | |
3000 | The mask specifies that some bits of an address (the bits which are | |
3001 | reset in the mask) should be ignored when matching the address accessed | |
3002 | by the inferior against the watchpoint address. See the "PowerPC Embedded" | |
3003 | section in the user manual for more details. | |
3004 | ||
3005 | * The new option --once causes GDBserver to stop listening for connections once | |
3006 | the first connection is made. The listening port used by GDBserver will | |
3007 | become available after that. | |
3008 | ||
3009 | * New commands "info macros" and "alias" have been added. | |
3010 | ||
3011 | * New function parameters suffix @entry specifies value of function parameter | |
3012 | at the time the function got called. Entry values are available only since | |
3013 | gcc version 4.7. | |
3014 | ||
3015 | * New commands | |
3016 | ||
3017 | !SHELL COMMAND | |
3018 | "!" is now an alias of the "shell" command. | |
3019 | Note that no space is needed between "!" and SHELL COMMAND. | |
3020 | ||
3021 | * Changed commands | |
3022 | ||
3023 | watch EXPRESSION mask MASK_VALUE | |
3024 | The watch command now supports the mask argument which allows creation | |
3025 | of masked watchpoints, if the current architecture supports this feature. | |
3026 | ||
3027 | info auto-load-scripts [REGEXP] | |
3028 | This command was formerly named "maintenance print section-scripts". | |
3029 | It is now generally useful and is no longer a maintenance-only command. | |
3030 | ||
3031 | info macro [-all] [--] MACRO | |
3032 | The info macro command has new options `-all' and `--'. The first for | |
3033 | printing all definitions of a macro. The second for explicitly specifying | |
3034 | the end of arguments and the beginning of the macro name in case the macro | |
3035 | name starts with a hyphen. | |
3036 | ||
3037 | collect[/s] EXPRESSIONS | |
3038 | The tracepoint collect command now takes an optional modifier "/s" | |
3039 | that directs it to dereference pointer-to-character types and | |
3040 | collect the bytes of memory up to a zero byte. The behavior is | |
3041 | similar to what you see when you use the regular print command on a | |
3042 | string. An optional integer following the "/s" sets a bound on the | |
3043 | number of bytes that will be collected. | |
3044 | ||
3045 | tstart [NOTES] | |
3046 | The trace start command now interprets any supplied arguments as a | |
3047 | note to be recorded with the trace run, with an effect similar to | |
3048 | setting the variable trace-notes. | |
3049 | ||
3050 | tstop [NOTES] | |
3051 | The trace stop command now interprets any arguments as a note to be | |
3052 | mentioned along with the tstatus report that the trace was stopped | |
3053 | with a command. The effect is similar to setting the variable | |
3054 | trace-stop-notes. | |
3055 | ||
3056 | * Tracepoints can now be enabled and disabled at any time after a trace | |
3057 | experiment has been started using the standard "enable" and "disable" | |
3058 | commands. It is now possible to start a trace experiment with no enabled | |
3059 | tracepoints; GDB will display a warning, but will allow the experiment to | |
3060 | begin, assuming that tracepoints will be enabled as needed while the trace | |
3061 | is running. | |
3062 | ||
3063 | * Fast tracepoints on 32-bit x86-architectures can now be placed at | |
3064 | locations with 4-byte instructions, when they were previously | |
3065 | limited to locations with instructions of 5 bytes or longer. | |
3066 | ||
3067 | * New options | |
3068 | ||
3069 | set debug dwarf2-read | |
3070 | show debug dwarf2-read | |
3071 | Turns on or off display of debugging messages related to reading | |
3072 | DWARF debug info. The default is off. | |
3073 | ||
3074 | set debug symtab-create | |
3075 | show debug symtab-create | |
3076 | Turns on or off display of debugging messages related to symbol table | |
3077 | creation. The default is off. | |
3078 | ||
3079 | set extended-prompt | |
3080 | show extended-prompt | |
3081 | Set the GDB prompt, and allow escape sequences to be inserted to | |
3082 | display miscellaneous information (see 'help set extended-prompt' | |
3083 | for the list of sequences). This prompt (and any information | |
3084 | accessed through the escape sequences) is updated every time the | |
3085 | prompt is displayed. | |
3086 | ||
3087 | set print entry-values (both|compact|default|if-needed|no|only|preferred) | |
3088 | show print entry-values | |
3089 | Set printing of frame argument values at function entry. In some cases | |
3090 | GDB can determine the value of function argument which was passed by the | |
3091 | function caller, even if the value was modified inside the called function. | |
3092 | ||
3093 | set debug entry-values | |
3094 | show debug entry-values | |
3095 | Control display of debugging info for determining frame argument values at | |
3096 | function entry and virtual tail call frames. | |
3097 | ||
3098 | set basenames-may-differ | |
3099 | show basenames-may-differ | |
3100 | Set whether a source file may have multiple base names. | |
3101 | (A "base name" is the name of a file with the directory part removed. | |
3102 | Example: The base name of "/home/user/hello.c" is "hello.c".) | |
3103 | If set, GDB will canonicalize file names (e.g., expand symlinks) | |
3104 | before comparing them. Canonicalization is an expensive operation, | |
3105 | but it allows the same file be known by more than one base name. | |
3106 | If not set (the default), all source files are assumed to have just | |
3107 | one base name, and gdb will do file name comparisons more efficiently. | |
3108 | ||
3109 | set trace-user | |
3110 | show trace-user | |
3111 | set trace-notes | |
3112 | show trace-notes | |
3113 | Set a user name and notes for the current and any future trace runs. | |
3114 | This is useful for long-running and/or disconnected traces, to | |
3115 | inform others (or yourself) as to who is running the trace, supply | |
3116 | contact information, or otherwise explain what is going on. | |
3117 | ||
3118 | set trace-stop-notes | |
3119 | show trace-stop-notes | |
3120 | Set a note attached to the trace run, that is displayed when the | |
3121 | trace has been stopped by a tstop command. This is useful for | |
3122 | instance as an explanation, if you are stopping a trace run that was | |
3123 | started by someone else. | |
3124 | ||
3125 | * New remote packets | |
3126 | ||
3127 | QTEnable | |
3128 | ||
3129 | Dynamically enable a tracepoint in a started trace experiment. | |
3130 | ||
3131 | QTDisable | |
3132 | ||
3133 | Dynamically disable a tracepoint in a started trace experiment. | |
3134 | ||
3135 | QTNotes | |
3136 | ||
3137 | Set the user and notes of the trace run. | |
3138 | ||
3139 | qTP | |
3140 | ||
3141 | Query the current status of a tracepoint. | |
3142 | ||
3143 | qTMinFTPILen | |
3144 | ||
3145 | Query the minimum length of instruction at which a fast tracepoint may | |
3146 | be placed. | |
3147 | ||
3148 | * Dcache size (number of lines) and line-size are now runtime-configurable | |
3149 | via "set dcache line" and "set dcache line-size" commands. | |
3150 | ||
3151 | * New targets | |
3152 | ||
3153 | Texas Instruments TMS320C6x tic6x-*-* | |
3154 | ||
3155 | * New Simulators | |
3156 | ||
3157 | Renesas RL78 rl78-*-elf | |
3158 | ||
3159 | *** Changes in GDB 7.3.1 | |
3160 | ||
3161 | * The build failure for NetBSD and OpenBSD targets have now been fixed. | |
3162 | ||
3163 | *** Changes in GDB 7.3 | |
3164 | ||
3165 | * GDB has a new command: "thread find [REGEXP]". | |
3166 | It finds the thread id whose name, target id, or thread extra info | |
3167 | matches the given regular expression. | |
3168 | ||
3169 | * The "catch syscall" command now works on mips*-linux* targets. | |
3170 | ||
3171 | * The -data-disassemble MI command now supports modes 2 and 3 for | |
3172 | dumping the instruction opcodes. | |
3173 | ||
3174 | * New command line options | |
3175 | ||
3176 | -data-directory DIR Specify DIR as the "data-directory". | |
3177 | This is mostly for testing purposes. | |
3178 | ||
3179 | * The "maint set python auto-load on|off" command has been renamed to | |
3180 | "set auto-load-scripts on|off". | |
3181 | ||
3182 | * GDB has a new command: "set directories". | |
3183 | It is like the "dir" command except that it replaces the | |
3184 | source path list instead of augmenting it. | |
3185 | ||
3186 | * GDB now understands thread names. | |
3187 | ||
3188 | On GNU/Linux, "info threads" will display the thread name as set by | |
3189 | prctl or pthread_setname_np. | |
3190 | ||
3191 | There is also a new command, "thread name", which can be used to | |
3192 | assign a name internally for GDB to display. | |
3193 | ||
3194 | * OpenCL C | |
3195 | Initial support for the OpenCL C language (http://www.khronos.org/opencl) | |
3196 | has been integrated into GDB. | |
3197 | ||
3198 | * Python scripting | |
3199 | ||
3200 | ** The function gdb.Write now accepts an optional keyword 'stream'. | |
3201 | This keyword, when provided, will direct the output to either | |
3202 | stdout, stderr, or GDB's logging output. | |
3203 | ||
3204 | ** Parameters can now be be sub-classed in Python, and in particular | |
3205 | you may implement the get_set_doc and get_show_doc functions. | |
3206 | This improves how Parameter set/show documentation is processed | |
3207 | and allows for more dynamic content. | |
3208 | ||
3209 | ** Symbols, Symbol Table, Symbol Table and Line, Object Files, | |
3210 | Inferior, Inferior Thread, Blocks, and Block Iterator APIs now | |
3211 | have an is_valid method. | |
3212 | ||
3213 | ** Breakpoints can now be sub-classed in Python, and in particular | |
3214 | you may implement a 'stop' function that is executed each time | |
3215 | the inferior reaches that breakpoint. | |
3216 | ||
3217 | ** New function gdb.lookup_global_symbol looks up a global symbol. | |
3218 | ||
3219 | ** GDB values in Python are now callable if the value represents a | |
3220 | function. For example, if 'some_value' represents a function that | |
3221 | takes two integer parameters and returns a value, you can call | |
3222 | that function like so: | |
3223 | ||
3224 | result = some_value (10,20) | |
3225 | ||
3226 | ** Module gdb.types has been added. | |
3227 | It contains a collection of utilities for working with gdb.Types objects: | |
3228 | get_basic_type, has_field, make_enum_dict. | |
3229 | ||
3230 | ** Module gdb.printing has been added. | |
3231 | It contains utilities for writing and registering pretty-printers. | |
3232 | New classes: PrettyPrinter, SubPrettyPrinter, | |
3233 | RegexpCollectionPrettyPrinter. | |
3234 | New function: register_pretty_printer. | |
3235 | ||
3236 | ** New commands "info pretty-printers", "enable pretty-printer" and | |
3237 | "disable pretty-printer" have been added. | |
3238 | ||
3239 | ** gdb.parameter("directories") is now available. | |
3240 | ||
3241 | ** New function gdb.newest_frame returns the newest frame in the | |
3242 | selected thread. | |
3243 | ||
3244 | ** The gdb.InferiorThread class has a new "name" attribute. This | |
3245 | holds the thread's name. | |
3246 | ||
3247 | ** Python Support for Inferior events. | |
3248 | Python scripts can add observers to be notified of events | |
3249 | occurring in the process being debugged. | |
3250 | The following events are currently supported: | |
3251 | - gdb.events.cont Continue event. | |
3252 | - gdb.events.exited Inferior exited event. | |
3253 | - gdb.events.stop Signal received, and Breakpoint hit events. | |
3254 | ||
3255 | * C++ Improvements: | |
3256 | ||
3257 | ** GDB now puts template parameters in scope when debugging in an | |
3258 | instantiation. For example, if you have: | |
3259 | ||
3260 | template<int X> int func (void) { return X; } | |
3261 | ||
3262 | then if you step into func<5>, "print X" will show "5". This | |
3263 | feature requires proper debuginfo support from the compiler; it | |
3264 | was added to GCC 4.5. | |
3265 | ||
3266 | ** The motion commands "next", "finish", "until", and "advance" now | |
3267 | work better when exceptions are thrown. In particular, GDB will | |
3268 | no longer lose control of the inferior; instead, the GDB will | |
3269 | stop the inferior at the point at which the exception is caught. | |
3270 | This functionality requires a change in the exception handling | |
3271 | code that was introduced in GCC 4.5. | |
3272 | ||
3273 | * GDB now follows GCC's rules on accessing volatile objects when | |
3274 | reading or writing target state during expression evaluation. | |
3275 | One notable difference to prior behavior is that "print x = 0" | |
3276 | no longer generates a read of x; the value of the assignment is | |
3277 | now always taken directly from the value being assigned. | |
3278 | ||
3279 | * GDB now has some support for using labels in the program's source in | |
3280 | linespecs. For instance, you can use "advance label" to continue | |
3281 | execution to a label. | |
3282 | ||
3283 | * GDB now has support for reading and writing a new .gdb_index | |
3284 | section. This section holds a fast index of DWARF debugging | |
3285 | information and can be used to greatly speed up GDB startup and | |
3286 | operation. See the documentation for `save gdb-index' for details. | |
3287 | ||
3288 | * The "watch" command now accepts an optional "-location" argument. | |
3289 | When used, this causes GDB to watch the memory referred to by the | |
3290 | expression. Such a watchpoint is never deleted due to it going out | |
3291 | of scope. | |
3292 | ||
3293 | * GDB now supports thread debugging of core dumps on GNU/Linux. | |
3294 | ||
3295 | GDB now activates thread debugging using the libthread_db library | |
3296 | when debugging GNU/Linux core dumps, similarly to when debugging | |
3297 | live processes. As a result, when debugging a core dump file, GDB | |
3298 | is now able to display pthread_t ids of threads. For example, "info | |
3299 | threads" shows the same output as when debugging the process when it | |
3300 | was live. In earlier releases, you'd see something like this: | |
3301 | ||
3302 | (gdb) info threads | |
3303 | * 1 LWP 6780 main () at main.c:10 | |
3304 | ||
3305 | While now you see this: | |
3306 | ||
3307 | (gdb) info threads | |
3308 | * 1 Thread 0x7f0f5712a700 (LWP 6780) main () at main.c:10 | |
3309 | ||
3310 | It is also now possible to inspect TLS variables when debugging core | |
3311 | dumps. | |
3312 | ||
3313 | When debugging a core dump generated on a machine other than the one | |
3314 | used to run GDB, you may need to point GDB at the correct | |
3315 | libthread_db library with the "set libthread-db-search-path" | |
3316 | command. See the user manual for more details on this command. | |
3317 | ||
3318 | * When natively debugging programs on PowerPC BookE processors running | |
3319 | a Linux kernel version 2.6.34 or later, GDB supports ranged breakpoints, | |
3320 | which stop execution of the inferior whenever it executes an instruction | |
3321 | at any address within the specified range. See the "PowerPC Embedded" | |
3322 | section in the user manual for more details. | |
3323 | ||
3324 | * New features in the GDB remote stub, GDBserver | |
3325 | ||
3326 | ** GDBserver is now supported on PowerPC LynxOS (versions 4.x and 5.x), | |
3327 | and i686 LynxOS (version 5.x). | |
3328 | ||
3329 | ** GDBserver is now supported on Blackfin Linux. | |
3330 | ||
3331 | * New native configurations | |
3332 | ||
3333 | ia64 HP-UX ia64-*-hpux* | |
3334 | ||
3335 | * New targets: | |
3336 | ||
3337 | Analog Devices, Inc. Blackfin Processor bfin-* | |
3338 | ||
3339 | * Ada task switching is now supported on sparc-elf targets when | |
3340 | debugging a program using the Ravenscar Profile. For more information, | |
3341 | see the "Tasking Support when using the Ravenscar Profile" section | |
3342 | in the GDB user manual. | |
3343 | ||
3344 | * Guile support was removed. | |
3345 | ||
3346 | * New features in the GNU simulator | |
3347 | ||
3348 | ** The --map-info flag lists all known core mappings. | |
3349 | ||
3350 | ** CFI flashes may be simulated via the "cfi" device. | |
3351 | ||
3352 | *** Changes in GDB 7.2 | |
3353 | ||
3354 | * Shared library support for remote targets by default | |
3355 | ||
3356 | When GDB is configured for a generic, non-OS specific target, like | |
3357 | for example, --target=arm-eabi or one of the many *-*-elf targets, | |
3358 | GDB now queries remote stubs for loaded shared libraries using the | |
3359 | `qXfer:libraries:read' packet. Previously, shared library support | |
3360 | was always disabled for such configurations. | |
3361 | ||
3362 | * C++ Improvements: | |
3363 | ||
3364 | ** Argument Dependent Lookup (ADL) | |
3365 | ||
3366 | In C++ ADL lookup directs function search to the namespaces of its | |
3367 | arguments even if the namespace has not been imported. | |
3368 | For example: | |
3369 | namespace A | |
3370 | { | |
3371 | class B { }; | |
3372 | void foo (B) { } | |
3373 | } | |
3374 | ... | |
3375 | A::B b | |
3376 | foo(b) | |
3377 | Here the compiler will search for `foo' in the namespace of 'b' | |
3378 | and find A::foo. GDB now supports this. This construct is commonly | |
3379 | used in the Standard Template Library for operators. | |
3380 | ||
3381 | ** Improved User Defined Operator Support | |
3382 | ||
3383 | In addition to member operators, GDB now supports lookup of operators | |
3384 | defined in a namespace and imported with a `using' directive, operators | |
3385 | defined in the global scope, operators imported implicitly from an | |
3386 | anonymous namespace, and the ADL operators mentioned in the previous | |
3387 | entry. | |
3388 | GDB now also supports proper overload resolution for all the previously | |
3389 | mentioned flavors of operators. | |
3390 | ||
3391 | ** static const class members | |
3392 | ||
3393 | Printing of static const class members that are initialized in the | |
3394 | class definition has been fixed. | |
3395 | ||
3396 | * Windows Thread Information Block access. | |
3397 | ||
3398 | On Windows targets, GDB now supports displaying the Windows Thread | |
3399 | Information Block (TIB) structure. This structure is visible either | |
3400 | by using the new command `info w32 thread-information-block' or, by | |
3401 | dereferencing the new convenience variable named `$_tlb', a | |
3402 | thread-specific pointer to the TIB. This feature is also supported | |
3403 | when remote debugging using GDBserver. | |
3404 | ||
3405 | * Static tracepoints | |
3406 | ||
3407 | Static tracepoints are calls in the user program into a tracing | |
3408 | library. One such library is a port of the LTTng kernel tracer to | |
3409 | userspace --- UST (LTTng Userspace Tracer, http://lttng.org/ust). | |
3410 | When debugging with GDBserver, GDB now supports combining the GDB | |
3411 | tracepoint machinery with such libraries. For example: the user can | |
3412 | use GDB to probe a static tracepoint marker (a call from the user | |
3413 | program into the tracing library) with the new "strace" command (see | |
3414 | "New commands" below). This creates a "static tracepoint" in the | |
3415 | breakpoint list, that can be manipulated with the same feature set | |
3416 | as fast and regular tracepoints. E.g., collect registers, local and | |
3417 | global variables, collect trace state variables, and define | |
3418 | tracepoint conditions. In addition, the user can collect extra | |
3419 | static tracepoint marker specific data, by collecting the new | |
3420 | $_sdata internal variable. When analyzing the trace buffer, you can | |
3421 | inspect $_sdata like any other variable available to GDB. For more | |
3422 | information, see the "Tracepoints" chapter in GDB user manual. New | |
3423 | remote packets have been defined to support static tracepoints, see | |
3424 | the "New remote packets" section below. | |
3425 | ||
3426 | * Better reconstruction of tracepoints after disconnected tracing | |
3427 | ||
3428 | GDB will attempt to download the original source form of tracepoint | |
3429 | definitions when starting a trace run, and then will upload these | |
3430 | upon reconnection to the target, resulting in a more accurate | |
3431 | reconstruction of the tracepoints that are in use on the target. | |
3432 | ||
3433 | * Observer mode | |
3434 | ||
3435 | You can now exercise direct control over the ways that GDB can | |
3436 | affect your program. For instance, you can disallow the setting of | |
3437 | breakpoints, so that the program can run continuously (assuming | |
3438 | non-stop mode). In addition, the "observer" variable is available | |
3439 | to switch all of the different controls; in observer mode, GDB | |
3440 | cannot affect the target's behavior at all, which is useful for | |
3441 | tasks like diagnosing live systems in the field. | |
3442 | ||
3443 | * The new convenience variable $_thread holds the number of the | |
3444 | current thread. | |
3445 | ||
3446 | * New remote packets | |
3447 | ||
3448 | qGetTIBAddr | |
3449 | ||
3450 | Return the address of the Windows Thread Information Block of a given thread. | |
3451 | ||
3452 | qRelocInsn | |
3453 | ||
3454 | In response to several of the tracepoint packets, the target may now | |
3455 | also respond with a number of intermediate `qRelocInsn' request | |
3456 | packets before the final result packet, to have GDB handle | |
3457 | relocating an instruction to execute at a different address. This | |
3458 | is particularly useful for stubs that support fast tracepoints. GDB | |
3459 | reports support for this feature in the qSupported packet. | |
3460 | ||
3461 | qTfSTM, qTsSTM | |
3462 | ||
3463 | List static tracepoint markers in the target program. | |
3464 | ||
3465 | qTSTMat | |
3466 | ||
3467 | List static tracepoint markers at a given address in the target | |
3468 | program. | |
3469 | ||
3470 | qXfer:statictrace:read | |
3471 | ||
3472 | Read the static trace data collected (by a `collect $_sdata' | |
3473 | tracepoint action). The remote stub reports support for this packet | |
3474 | to gdb's qSupported query. | |
3475 | ||
3476 | QAllow | |
3477 | ||
3478 | Send the current settings of GDB's permission flags. | |
3479 | ||
3480 | QTDPsrc | |
3481 | ||
3482 | Send part of the source (textual) form of a tracepoint definition, | |
3483 | which includes location, conditional, and action list. | |
3484 | ||
3485 | * The source command now accepts a -s option to force searching for the | |
3486 | script in the source search path even if the script name specifies | |
3487 | a directory. | |
3488 | ||
3489 | * New features in the GDB remote stub, GDBserver | |
3490 | ||
3491 | - GDBserver now support tracepoints (including fast tracepoints, and | |
3492 | static tracepoints). The feature is currently supported by the | |
3493 | i386-linux and amd64-linux builds. See the "Tracepoints support | |
3494 | in gdbserver" section in the manual for more information. | |
3495 | ||
3496 | GDBserver JIT compiles the tracepoint's conditional agent | |
3497 | expression bytecode into native code whenever possible for low | |
3498 | overhead dynamic tracepoints conditionals. For such tracepoints, | |
3499 | an expression that examines program state is evaluated when the | |
3500 | tracepoint is reached, in order to determine whether to capture | |
3501 | trace data. If the condition is simple and false, processing the | |
3502 | tracepoint finishes very quickly and no data is gathered. | |
3503 | ||
3504 | GDBserver interfaces with the UST (LTTng Userspace Tracer) library | |
3505 | for static tracepoints support. | |
3506 | ||
3507 | - GDBserver now supports x86_64 Windows 64-bit debugging. | |
3508 | ||
3509 | * GDB now sends xmlRegisters= in qSupported packet to indicate that | |
3510 | it understands register description. | |
3511 | ||
3512 | * The --batch flag now disables pagination and queries. | |
3513 | ||
3514 | * X86 general purpose registers | |
3515 | ||
3516 | GDB now supports reading/writing byte, word and double-word x86 | |
3517 | general purpose registers directly. This means you can use, say, | |
3518 | $ah or $ax to refer, respectively, to the byte register AH and | |
3519 | 16-bit word register AX that are actually portions of the 32-bit | |
3520 | register EAX or 64-bit register RAX. | |
3521 | ||
3522 | * The `commands' command now accepts a range of breakpoints to modify. | |
3523 | A plain `commands' following a command that creates multiple | |
3524 | breakpoints affects all the breakpoints set by that command. This | |
3525 | applies to breakpoints set by `rbreak', and also applies when a | |
3526 | single `break' command creates multiple breakpoints (e.g., | |
3527 | breakpoints on overloaded c++ functions). | |
3528 | ||
3529 | * The `rbreak' command now accepts a filename specification as part of | |
3530 | its argument, limiting the functions selected by the regex to those | |
3531 | in the specified file. | |
3532 | ||
3533 | * Support for remote debugging Windows and SymbianOS shared libraries | |
3534 | from Unix hosts has been improved. Non Windows GDB builds now can | |
3535 | understand target reported file names that follow MS-DOS based file | |
3536 | system semantics, such as file names that include drive letters and | |
3537 | use the backslash character as directory separator. This makes it | |
3538 | possible to transparently use the "set sysroot" and "set | |
3539 | solib-search-path" on Unix hosts to point as host copies of the | |
3540 | target's shared libraries. See the new command "set | |
3541 | target-file-system-kind" described below, and the "Commands to | |
3542 | specify files" section in the user manual for more information. | |
3543 | ||
3544 | * New commands | |
3545 | ||
3546 | eval template, expressions... | |
3547 | Convert the values of one or more expressions under the control | |
3548 | of the string template to a command line, and call it. | |
3549 | ||
3550 | set target-file-system-kind unix|dos-based|auto | |
3551 | show target-file-system-kind | |
3552 | Set or show the assumed file system kind for target reported file | |
3553 | names. | |
3554 | ||
3555 | save breakpoints <filename> | |
3556 | Save all current breakpoint definitions to a file suitable for use | |
3557 | in a later debugging session. To read the saved breakpoint | |
3558 | definitions, use the `source' command. | |
3559 | ||
3560 | `save tracepoints' is a new alias for `save-tracepoints'. The latter | |
3561 | is now deprecated. | |
3562 | ||
3563 | info static-tracepoint-markers | |
3564 | Display information about static tracepoint markers in the target. | |
3565 | ||
3566 | strace FN | FILE:LINE | *ADDR | -m MARKER_ID | |
3567 | Define a static tracepoint by probing a marker at the given | |
3568 | function, line, address, or marker ID. | |
3569 | ||
3570 | set observer on|off | |
3571 | show observer | |
3572 | Enable and disable observer mode. | |
3573 | ||
3574 | set may-write-registers on|off | |
3575 | set may-write-memory on|off | |
3576 | set may-insert-breakpoints on|off | |
3577 | set may-insert-tracepoints on|off | |
3578 | set may-insert-fast-tracepoints on|off | |
3579 | set may-interrupt on|off | |
3580 | Set individual permissions for GDB effects on the target. Note that | |
3581 | some of these settings can have undesirable or surprising | |
3582 | consequences, particularly when changed in the middle of a session. | |
3583 | For instance, disabling the writing of memory can prevent | |
3584 | breakpoints from being inserted, cause single-stepping to fail, or | |
3585 | even crash your program, if you disable after breakpoints have been | |
3586 | inserted. However, GDB should not crash. | |
3587 | ||
3588 | set record memory-query on|off | |
3589 | show record memory-query | |
3590 | Control whether to stop the inferior if memory changes caused | |
3591 | by an instruction cannot be recorded. | |
3592 | ||
3593 | * Changed commands | |
3594 | ||
3595 | disassemble | |
3596 | The disassemble command now supports "start,+length" form of two arguments. | |
3597 | ||
3598 | * Python scripting | |
3599 | ||
3600 | ** GDB now provides a new directory location, called the python directory, | |
3601 | where Python scripts written for GDB can be installed. The location | |
3602 | of that directory is <data-directory>/python, where <data-directory> | |
3603 | is the GDB data directory. For more details, see section `Scripting | |
3604 | GDB using Python' in the manual. | |
3605 | ||
3606 | ** The GDB Python API now has access to breakpoints, symbols, symbol | |
3607 | tables, program spaces, inferiors, threads and frame's code blocks. | |
3608 | Additionally, GDB Parameters can now be created from the API, and | |
3609 | manipulated via set/show in the CLI. | |
3610 | ||
3611 | ** New functions gdb.target_charset, gdb.target_wide_charset, | |
3612 | gdb.progspaces, gdb.current_progspace, and gdb.string_to_argv. | |
3613 | ||
3614 | ** New exception gdb.GdbError. | |
3615 | ||
3616 | ** Pretty-printers are now also looked up in the current program space. | |
3617 | ||
3618 | ** Pretty-printers can now be individually enabled and disabled. | |
3619 | ||
3620 | ** GDB now looks for names of Python scripts to auto-load in a | |
3621 | special section named `.debug_gdb_scripts', in addition to looking | |
3622 | for a OBJFILE-gdb.py script when OBJFILE is read by the debugger. | |
3623 | ||
3624 | * Tracepoint actions were unified with breakpoint commands. In particular, | |
3625 | there are no longer differences in "info break" output for breakpoints and | |
3626 | tracepoints and the "commands" command can be used for both tracepoints and | |
3627 | regular breakpoints. | |
3628 | ||
3629 | * New targets | |
3630 | ||
3631 | ARM Symbian arm*-*-symbianelf* | |
3632 | ||
3633 | * D language support. | |
3634 | GDB now supports debugging programs written in the D programming | |
3635 | language. | |
3636 | ||
3637 | * GDB now supports the extended ptrace interface for PowerPC which is | |
3638 | available since Linux kernel version 2.6.34. This automatically enables | |
3639 | any hardware breakpoints and additional hardware watchpoints available in | |
3640 | the processor. The old ptrace interface exposes just one hardware | |
3641 | watchpoint and no hardware breakpoints. | |
3642 | ||
3643 | * GDB is now able to use the Data Value Compare (DVC) register available on | |
3644 | embedded PowerPC processors to implement in hardware simple watchpoint | |
3645 | conditions of the form: | |
3646 | ||
3647 | watch ADDRESS|VARIABLE if ADDRESS|VARIABLE == CONSTANT EXPRESSION | |
3648 | ||
3649 | This works in native GDB running on Linux kernels with the extended ptrace | |
3650 | interface mentioned above. | |
3651 | ||
3652 | *** Changes in GDB 7.1 | |
3653 | ||
3654 | * C++ Improvements | |
3655 | ||
3656 | ** Namespace Support | |
3657 | ||
3658 | GDB now supports importing of namespaces in C++. This enables the | |
3659 | user to inspect variables from imported namespaces. Support for | |
3660 | namepace aliasing has also been added. So, if a namespace is | |
3661 | aliased in the current scope (e.g. namepace C=A; ) the user can | |
3662 | print variables using the alias (e.g. (gdb) print C::x). | |
3663 | ||
3664 | ** Bug Fixes | |
3665 | ||
3666 | All known bugs relating to the printing of virtual base class were | |
3667 | fixed. It is now possible to call overloaded static methods using a | |
3668 | qualified name. | |
3669 | ||
3670 | ** Cast Operators | |
3671 | ||
3672 | The C++ cast operators static_cast<>, dynamic_cast<>, const_cast<>, | |
3673 | and reinterpret_cast<> are now handled by the C++ expression parser. | |
3674 | ||
3675 | * New targets | |
3676 | ||
3677 | Xilinx MicroBlaze microblaze-*-* | |
3678 | Renesas RX rx-*-elf | |
3679 | ||
3680 | * New Simulators | |
3681 | ||
3682 | Xilinx MicroBlaze microblaze | |
3683 | Renesas RX rx | |
3684 | ||
3685 | * Multi-program debugging. | |
3686 | ||
3687 | GDB now has support for multi-program (a.k.a. multi-executable or | |
3688 | multi-exec) debugging. This allows for debugging multiple inferiors | |
3689 | simultaneously each running a different program under the same GDB | |
3690 | session. See "Debugging Multiple Inferiors and Programs" in the | |
3691 | manual for more information. This implied some user visible changes | |
3692 | in the multi-inferior support. For example, "info inferiors" now | |
3693 | lists inferiors that are not running yet or that have exited | |
3694 | already. See also "New commands" and "New options" below. | |
3695 | ||
3696 | * New tracing features | |
3697 | ||
3698 | GDB's tracepoint facility now includes several new features: | |
3699 | ||
3700 | ** Trace state variables | |
3701 | ||
3702 | GDB tracepoints now include support for trace state variables, which | |
3703 | are variables managed by the target agent during a tracing | |
3704 | experiment. They are useful for tracepoints that trigger each | |
3705 | other, so for instance one tracepoint can count hits in a variable, | |
3706 | and then a second tracepoint has a condition that is true when the | |
3707 | count reaches a particular value. Trace state variables share the | |
3708 | $-syntax of GDB convenience variables, and can appear in both | |
3709 | tracepoint actions and condition expressions. Use the "tvariable" | |
3710 | command to create, and "info tvariables" to view; see "Trace State | |
3711 | Variables" in the manual for more detail. | |
3712 | ||
3713 | ** Fast tracepoints | |
3714 | ||
3715 | GDB now includes an option for defining fast tracepoints, which | |
3716 | targets may implement more efficiently, such as by installing a jump | |
3717 | into the target agent rather than a trap instruction. The resulting | |
3718 | speedup can be by two orders of magnitude or more, although the | |
3719 | tradeoff is that some program locations on some target architectures | |
3720 | might not allow fast tracepoint installation, for instance if the | |
3721 | instruction to be replaced is shorter than the jump. To request a | |
3722 | fast tracepoint, use the "ftrace" command, with syntax identical to | |
3723 | the regular trace command. | |
3724 | ||
3725 | ** Disconnected tracing | |
3726 | ||
3727 | It is now possible to detach GDB from the target while it is running | |
3728 | a trace experiment, then reconnect later to see how the experiment | |
3729 | is going. In addition, a new variable disconnected-tracing lets you | |
3730 | tell the target agent whether to continue running a trace if the | |
3731 | connection is lost unexpectedly. | |
3732 | ||
3733 | ** Trace files | |
3734 | ||
3735 | GDB now has the ability to save the trace buffer into a file, and | |
3736 | then use that file as a target, similarly to you can do with | |
3737 | corefiles. You can select trace frames, print data that was | |
3738 | collected in them, and use tstatus to display the state of the | |
3739 | tracing run at the moment that it was saved. To create a trace | |
3740 | file, use "tsave <filename>", and to use it, do "target tfile | |
3741 | <name>". | |
3742 | ||
3743 | ** Circular trace buffer | |
3744 | ||
3745 | You can ask the target agent to handle the trace buffer as a | |
3746 | circular buffer, discarding the oldest trace frames to make room for | |
3747 | newer ones, by setting circular-trace-buffer to on. This feature may | |
3748 | not be available for all target agents. | |
3749 | ||
3750 | * Changed commands | |
3751 | ||
3752 | disassemble | |
3753 | The disassemble command, when invoked with two arguments, now requires | |
3754 | the arguments to be comma-separated. | |
3755 | ||
3756 | info variables | |
3757 | The info variables command now displays variable definitions. Files | |
3758 | which only declare a variable are not shown. | |
3759 | ||
3760 | source | |
3761 | The source command is now capable of sourcing Python scripts. | |
3762 | This feature is dependent on the debugger being build with Python | |
3763 | support. | |
3764 | ||
3765 | Related to this enhancement is also the introduction of a new command | |
3766 | "set script-extension" (see below). | |
3767 | ||
3768 | * New commands (for set/show, see "New options" below) | |
3769 | ||
3770 | record save [<FILENAME>] | |
3771 | Save a file (in core file format) containing the process record | |
3772 | execution log for replay debugging at a later time. | |
3773 | ||
3774 | record restore <FILENAME> | |
3775 | Restore the process record execution log that was saved at an | |
3776 | earlier time, for replay debugging. | |
3777 | ||
3778 | add-inferior [-copies <N>] [-exec <FILENAME>] | |
3779 | Add a new inferior. | |
3780 | ||
3781 | clone-inferior [-copies <N>] [ID] | |
3782 | Make a new inferior ready to execute the same program another | |
3783 | inferior has loaded. | |
3784 | ||
3785 | remove-inferior ID | |
3786 | Remove an inferior. | |
3787 | ||
3788 | maint info program-spaces | |
3789 | List the program spaces loaded into GDB. | |
3790 | ||
3791 | set remote interrupt-sequence [Ctrl-C | BREAK | BREAK-g] | |
3792 | show remote interrupt-sequence | |
3793 | Allow the user to select one of ^C, a BREAK signal or BREAK-g | |
3794 | as the sequence to the remote target in order to interrupt the execution. | |
3795 | Ctrl-C is a default. Some system prefers BREAK which is high level of | |
3796 | serial line for some certain time. Linux kernel prefers BREAK-g, a.k.a | |
3797 | Magic SysRq g. It is BREAK signal and character 'g'. | |
3798 | ||
3799 | set remote interrupt-on-connect [on | off] | |
3800 | show remote interrupt-on-connect | |
3801 | When interrupt-on-connect is ON, gdb sends interrupt-sequence to | |
3802 | remote target when gdb connects to it. This is needed when you debug | |
3803 | Linux kernel. | |
3804 | ||
3805 | set remotebreak [on | off] | |
3806 | show remotebreak | |
3807 | Deprecated. Use "set/show remote interrupt-sequence" instead. | |
3808 | ||
3809 | tvariable $NAME [ = EXP ] | |
3810 | Create or modify a trace state variable. | |
3811 | ||
3812 | info tvariables | |
3813 | List trace state variables and their values. | |
3814 | ||
3815 | delete tvariable $NAME ... | |
3816 | Delete one or more trace state variables. | |
3817 | ||
3818 | teval EXPR, ... | |
3819 | Evaluate the given expressions without collecting anything into the | |
3820 | trace buffer. (Valid in tracepoint actions only.) | |
3821 | ||
3822 | ftrace FN / FILE:LINE / *ADDR | |
3823 | Define a fast tracepoint at the given function, line, or address. | |
3824 | ||
3825 | * New expression syntax | |
3826 | ||
3827 | GDB now parses the 0b prefix of binary numbers the same way as GCC does. | |
3828 | GDB now parses 0b101010 identically with 42. | |
3829 | ||
3830 | * New options | |
3831 | ||
3832 | set follow-exec-mode new|same | |
3833 | show follow-exec-mode | |
3834 | Control whether GDB reuses the same inferior across an exec call or | |
3835 | creates a new one. This is useful to be able to restart the old | |
3836 | executable after the inferior having done an exec call. | |
3837 | ||
3838 | set default-collect EXPR, ... | |
3839 | show default-collect | |
3840 | Define a list of expressions to be collected at each tracepoint. | |
3841 | This is a useful way to ensure essential items are not overlooked, | |
3842 | such as registers or a critical global variable. | |
3843 | ||
3844 | set disconnected-tracing | |
3845 | show disconnected-tracing | |
3846 | If set to 1, the target is instructed to continue tracing if it | |
3847 | loses its connection to GDB. If 0, the target is to stop tracing | |
3848 | upon disconnection. | |
3849 | ||
3850 | set circular-trace-buffer | |
3851 | show circular-trace-buffer | |
3852 | If set to on, the target is instructed to use a circular trace buffer | |
3853 | and discard the oldest trace frames instead of stopping the trace due | |
3854 | to a full trace buffer. If set to off, the trace stops when the buffer | |
3855 | fills up. Some targets may not support this. | |
3856 | ||
3857 | set script-extension off|soft|strict | |
3858 | show script-extension | |
3859 | If set to "off", the debugger does not perform any script language | |
3860 | recognition, and all sourced files are assumed to be GDB scripts. | |
3861 | If set to "soft" (the default), files are sourced according to | |
3862 | filename extension, falling back to GDB scripts if the first | |
3863 | evaluation failed. | |
3864 | If set to "strict", files are sourced according to filename extension. | |
3865 | ||
3866 | set ada trust-PAD-over-XVS on|off | |
3867 | show ada trust-PAD-over-XVS | |
3868 | If off, activate a workaround against a bug in the debugging information | |
3869 | generated by the compiler for PAD types (see gcc/exp_dbug.ads in | |
3870 | the GCC sources for more information about the GNAT encoding and | |
3871 | PAD types in particular). It is always safe to set this option to | |
3872 | off, but this introduces a slight performance penalty. The default | |
3873 | is on. | |
3874 | ||
3875 | * Python API Improvements | |
3876 | ||
3877 | ** GDB provides the new class gdb.LazyString. This is useful in | |
3878 | some pretty-printing cases. The new method gdb.Value.lazy_string | |
3879 | provides a simple way to create objects of this type. | |
3880 | ||
3881 | ** The fields returned by gdb.Type.fields now have an | |
3882 | `is_base_class' attribute. | |
3883 | ||
3884 | ** The new method gdb.Type.range returns the range of an array type. | |
3885 | ||
3886 | ** The new method gdb.parse_and_eval can be used to parse and | |
3887 | evaluate an expression. | |
3888 | ||
3889 | * New remote packets | |
3890 | ||
3891 | QTDV | |
3892 | Define a trace state variable. | |
3893 | ||
3894 | qTV | |
3895 | Get the current value of a trace state variable. | |
3896 | ||
3897 | QTDisconnected | |
3898 | Set desired tracing behavior upon disconnection. | |
3899 | ||
3900 | QTBuffer:circular | |
3901 | Set the trace buffer to be linear or circular. | |
3902 | ||
3903 | qTfP, qTsP | |
3904 | Get data about the tracepoints currently in use. | |
3905 | ||
3906 | * Bug fixes | |
3907 | ||
3908 | Process record now works correctly with hardware watchpoints. | |
3909 | ||
3910 | Multiple bug fixes have been made to the mips-irix port, making it | |
3911 | much more reliable. In particular: | |
3912 | - Debugging threaded applications is now possible again. Previously, | |
3913 | GDB would hang while starting the program, or while waiting for | |
3914 | the program to stop at a breakpoint. | |
3915 | - Attaching to a running process no longer hangs. | |
3916 | - An error occurring while loading a core file has been fixed. | |
3917 | - Changing the value of the PC register now works again. This fixes | |
3918 | problems observed when using the "jump" command, or when calling | |
3919 | a function from GDB, or even when assigning a new value to $pc. | |
3920 | - With the "finish" and "return" commands, the return value for functions | |
3921 | returning a small array is now correctly printed. | |
3922 | - It is now possible to break on shared library code which gets executed | |
3923 | during a shared library init phase (code executed while executing | |
3924 | their .init section). Previously, the breakpoint would have no effect. | |
3925 | - GDB is now able to backtrace through the signal handler for | |
3926 | non-threaded programs. | |
3927 | ||
3928 | PIE (Position Independent Executable) programs debugging is now supported. | |
3929 | This includes debugging execution of PIC (Position Independent Code) shared | |
3930 | libraries although for that, it should be possible to run such libraries as an | |
3931 | executable program. | |
3932 | ||
3933 | *** Changes in GDB 7.0 | |
3934 | ||
3935 | * GDB now has an interface for JIT compilation. Applications that | |
3936 | dynamically generate code can create symbol files in memory and register | |
3937 | them with GDB. For users, the feature should work transparently, and | |
3938 | for JIT developers, the interface is documented in the GDB manual in the | |
3939 | "JIT Compilation Interface" chapter. | |
3940 | ||
3941 | * Tracepoints may now be conditional. The syntax is as for | |
3942 | breakpoints; either an "if" clause appended to the "trace" command, | |
3943 | or the "condition" command is available. GDB sends the condition to | |
3944 | the target for evaluation using the same bytecode format as is used | |
3945 | for tracepoint actions. | |
3946 | ||
3947 | * The disassemble command now supports: an optional /r modifier, print the | |
3948 | raw instructions in hex as well as in symbolic form, and an optional /m | |
3949 | modifier to print mixed source+assembly. | |
3950 | ||
3951 | * Process record and replay | |
3952 | ||
3953 | In a architecture environment that supports ``process record and | |
3954 | replay'', ``process record and replay'' target can record a log of | |
3955 | the process execution, and replay it with both forward and reverse | |
3956 | execute commands. | |
3957 | ||
3958 | * Reverse debugging: GDB now has new commands reverse-continue, reverse- | |
3959 | step, reverse-next, reverse-finish, reverse-stepi, reverse-nexti, and | |
3960 | set execution-direction {forward|reverse}, for targets that support | |
3961 | reverse execution. | |
3962 | ||
3963 | * GDB now supports hardware watchpoints on MIPS/Linux systems. This | |
3964 | feature is available with a native GDB running on kernel version | |
3965 | 2.6.28 or later. | |
3966 | ||
3967 | * GDB now has support for multi-byte and wide character sets on the | |
3968 | target. Strings whose character type is wchar_t, char16_t, or | |
3969 | char32_t are now correctly printed. GDB supports wide- and unicode- | |
3970 | literals in C, that is, L'x', L"string", u'x', u"string", U'x', and | |
3971 | U"string" syntax. And, GDB allows the "%ls" and "%lc" formats in | |
3972 | `printf'. This feature requires iconv to work properly; if your | |
3973 | system does not have a working iconv, GDB can use GNU libiconv. See | |
3974 | the installation instructions for more information. | |
3975 | ||
3976 | * GDB now supports automatic retrieval of shared library files from | |
3977 | remote targets. To use this feature, specify a system root that begins | |
3978 | with the `remote:' prefix, either via the `set sysroot' command or via | |
3979 | the `--with-sysroot' configure-time option. | |
3980 | ||
3981 | * "info sharedlibrary" now takes an optional regex of libraries to show, | |
3982 | and it now reports if a shared library has no debugging information. | |
3983 | ||
3984 | * Commands `set debug-file-directory', `set solib-search-path' and `set args' | |
3985 | now complete on file names. | |
3986 | ||
3987 | * When completing in expressions, gdb will attempt to limit | |
3988 | completions to allowable structure or union fields, where appropriate. | |
3989 | For instance, consider: | |
3990 | ||
3991 | # struct example { int f1; double f2; }; | |
3992 | # struct example variable; | |
3993 | (gdb) p variable. | |
3994 | ||
3995 | If the user types TAB at the end of this command line, the available | |
3996 | completions will be "f1" and "f2". | |
3997 | ||
3998 | * Inlined functions are now supported. They show up in backtraces, and | |
3999 | the "step", "next", and "finish" commands handle them automatically. | |
4000 | ||
4001 | * GDB now supports the token-splicing (##) and stringification (#) | |
4002 | operators when expanding macros. It also supports variable-arity | |
4003 | macros. | |
4004 | ||
4005 | * GDB now supports inspecting extra signal information, exported by | |
4006 | the new $_siginfo convenience variable. The feature is currently | |
4007 | implemented on linux ARM, i386 and amd64. | |
4008 | ||
4009 | * GDB can now display the VFP floating point registers and NEON vector | |
4010 | registers on ARM targets. Both ARM GNU/Linux native GDB and gdbserver | |
4011 | can provide these registers (requires Linux 2.6.30 or later). Remote | |
4012 | and simulator targets may also provide them. | |
4013 | ||
4014 | * New remote packets | |
4015 | ||
4016 | qSearch:memory: | |
4017 | Search memory for a sequence of bytes. | |
4018 | ||
4019 | QStartNoAckMode | |
4020 | Turn off `+'/`-' protocol acknowledgments to permit more efficient | |
4021 | operation over reliable transport links. Use of this packet is | |
4022 | controlled by the `set remote noack-packet' command. | |
4023 | ||
4024 | vKill | |
4025 | Kill the process with the specified process ID. Use this in preference | |
4026 | to `k' when multiprocess protocol extensions are supported. | |
4027 | ||
4028 | qXfer:osdata:read | |
4029 | Obtains additional operating system information | |
4030 | ||
4031 | qXfer:siginfo:read | |
4032 | qXfer:siginfo:write | |
4033 | Read or write additional signal information. | |
4034 | ||
4035 | * Removed remote protocol undocumented extension | |
4036 | ||
4037 | An undocumented extension to the remote protocol's `S' stop reply | |
4038 | packet that permited the stub to pass a process id was removed. | |
4039 | Remote servers should use the `T' stop reply packet instead. | |
4040 | ||
4041 | * GDB now supports multiple function calling conventions according to the | |
4042 | DWARF-2 DW_AT_calling_convention function attribute. | |
4043 | ||
4044 | * The SH target utilizes the aforementioned change to distinguish between gcc | |
4045 | and Renesas calling convention. It also adds the new CLI commands | |
4046 | `set/show sh calling-convention'. | |
4047 | ||
4048 | * GDB can now read compressed debug sections, as produced by GNU gold | |
4049 | with the --compress-debug-sections=zlib flag. | |
4050 | ||
4051 | * 64-bit core files are now supported on AIX. | |
4052 | ||
4053 | * Thread switching is now supported on Tru64. | |
4054 | ||
4055 | * Watchpoints can now be set on unreadable memory locations, e.g. addresses | |
4056 | which will be allocated using malloc later in program execution. | |
4057 | ||
4058 | * The qXfer:libraries:read remote procotol packet now allows passing a | |
4059 | list of section offsets. | |
4060 | ||
4061 | * On GNU/Linux, GDB can now attach to stopped processes. Several race | |
4062 | conditions handling signals delivered during attach or thread creation | |
4063 | have also been fixed. | |
4064 | ||
4065 | * GDB now supports the use of DWARF boolean types for Ada's type Boolean. | |
4066 | From the user's standpoint, all unqualified instances of True and False | |
4067 | are treated as the standard definitions, regardless of context. | |
4068 | ||
4069 | * GDB now parses C++ symbol and type names more flexibly. For | |
4070 | example, given: | |
4071 | ||
4072 | template<typename T> class C { }; | |
4073 | C<char const *> c; | |
4074 | ||
4075 | GDB will now correctly handle all of: | |
4076 | ||
4077 | ptype C<char const *> | |
4078 | ptype C<char const*> | |
4079 | ptype C<const char *> | |
4080 | ptype C<const char*> | |
4081 | ||
4082 | * New features in the GDB remote stub, gdbserver | |
4083 | ||
4084 | - The "--wrapper" command-line argument tells gdbserver to use a | |
4085 | wrapper program to launch programs for debugging. | |
4086 | ||
4087 | - On PowerPC and S/390 targets, it is now possible to use a single | |
4088 | gdbserver executable to debug both 32-bit and 64-bit programs. | |
4089 | (This requires gdbserver itself to be built as a 64-bit executable.) | |
4090 | ||
4091 | - gdbserver uses the new noack protocol mode for TCP connections to | |
4092 | reduce communications latency, if also supported and enabled in GDB. | |
4093 | ||
4094 | - Support for the sparc64-linux-gnu target is now included in | |
4095 | gdbserver. | |
4096 | ||
4097 | - The amd64-linux build of gdbserver now supports debugging both | |
4098 | 32-bit and 64-bit programs. | |
4099 | ||
4100 | - The i386-linux, amd64-linux, and i386-win32 builds of gdbserver | |
4101 | now support hardware watchpoints, and will use them automatically | |
4102 | as appropriate. | |
4103 | ||
4104 | * Python scripting | |
4105 | ||
4106 | GDB now has support for scripting using Python. Whether this is | |
4107 | available is determined at configure time. | |
4108 | ||
4109 | New GDB commands can now be written in Python. | |
4110 | ||
4111 | * Ada tasking support | |
4112 | ||
4113 | Ada tasks can now be inspected in GDB. The following commands have | |
4114 | been introduced: | |
4115 | ||
4116 | info tasks | |
4117 | Print the list of Ada tasks. | |
4118 | info task N | |
4119 | Print detailed information about task number N. | |
4120 | task | |
4121 | Print the task number of the current task. | |
4122 | task N | |
4123 | Switch the context of debugging to task number N. | |
4124 | ||
4125 | * Support for user-defined prefixed commands. The "define" command can | |
4126 | add new commands to existing prefixes, e.g. "target". | |
4127 | ||
4128 | * Multi-inferior, multi-process debugging. | |
4129 | ||
4130 | GDB now has generalized support for multi-inferior debugging. See | |
4131 | "Debugging Multiple Inferiors" in the manual for more information. | |
4132 | Although availability still depends on target support, the command | |
4133 | set is more uniform now. The GNU/Linux specific multi-forks support | |
4134 | has been migrated to this new framework. This implied some user | |
4135 | visible changes; see "New commands" and also "Removed commands" | |
4136 | below. | |
4137 | ||
4138 | * Target descriptions can now describe the target OS ABI. See the | |
4139 | "Target Description Format" section in the user manual for more | |
4140 | information. | |
4141 | ||
4142 | * Target descriptions can now describe "compatible" architectures | |
4143 | to indicate that the target can execute applications for a different | |
4144 | architecture in addition to those for the main target architecture. | |
4145 | See the "Target Description Format" section in the user manual for | |
4146 | more information. | |
4147 | ||
4148 | * Multi-architecture debugging. | |
4149 | ||
4150 | GDB now includes general supports for debugging applications on | |
4151 | hybrid systems that use more than one single processor architecture | |
4152 | at the same time. Each such hybrid architecture still requires | |
4153 | specific support to be added. The only hybrid architecture supported | |
4154 | in this version of GDB is the Cell Broadband Engine. | |
4155 | ||
4156 | * GDB now supports integrated debugging of Cell/B.E. applications that | |
4157 | use both the PPU and SPU architectures. To enable support for hybrid | |
4158 | Cell/B.E. debugging, you need to configure GDB to support both the | |
4159 | powerpc-linux or powerpc64-linux and the spu-elf targets, using the | |
4160 | --enable-targets configure option. | |
4161 | ||
4162 | * Non-stop mode debugging. | |
4163 | ||
4164 | For some targets, GDB now supports an optional mode of operation in | |
4165 | which you can examine stopped threads while other threads continue | |
4166 | to execute freely. This is referred to as non-stop mode, with the | |
4167 | old mode referred to as all-stop mode. See the "Non-Stop Mode" | |
4168 | section in the user manual for more information. | |
4169 | ||
4170 | To be able to support remote non-stop debugging, a remote stub needs | |
4171 | to implement the non-stop mode remote protocol extensions, as | |
4172 | described in the "Remote Non-Stop" section of the user manual. The | |
4173 | GDB remote stub, gdbserver, has been adjusted to support these | |
4174 | extensions on linux targets. | |
4175 | ||
4176 | * New commands (for set/show, see "New options" below) | |
4177 | ||
4178 | catch syscall [NAME(S) | NUMBER(S)] | |
4179 | Catch system calls. Arguments, which should be names of system | |
4180 | calls or their numbers, mean catch only those syscalls. Without | |
4181 | arguments, every syscall will be caught. When the inferior issues | |
4182 | any of the specified syscalls, GDB will stop and announce the system | |
4183 | call, both when it is called and when its call returns. This | |
4184 | feature is currently available with a native GDB running on the | |
4185 | Linux Kernel, under the following architectures: x86, x86_64, | |
4186 | PowerPC and PowerPC64. | |
4187 | ||
4188 | find [/size-char] [/max-count] start-address, end-address|+search-space-size, | |
4189 | val1 [, val2, ...] | |
4190 | Search memory for a sequence of bytes. | |
4191 | ||
4192 | maint set python print-stack | |
4193 | maint show python print-stack | |
4194 | Show a stack trace when an error is encountered in a Python script. | |
4195 | ||
4196 | python [CODE] | |
4197 | Invoke CODE by passing it to the Python interpreter. | |
4198 | ||
4199 | macro define | |
4200 | macro list | |
4201 | macro undef | |
4202 | These allow macros to be defined, undefined, and listed | |
4203 | interactively. | |
4204 | ||
4205 | info os processes | |
4206 | Show operating system information about processes. | |
4207 | ||
4208 | info inferiors | |
4209 | List the inferiors currently under GDB's control. | |
4210 | ||
4211 | inferior NUM | |
4212 | Switch focus to inferior number NUM. | |
4213 | ||
4214 | detach inferior NUM | |
4215 | Detach from inferior number NUM. | |
4216 | ||
4217 | kill inferior NUM | |
4218 | Kill inferior number NUM. | |
4219 | ||
4220 | * New options | |
4221 | ||
4222 | set spu stop-on-load | |
4223 | show spu stop-on-load | |
4224 | Control whether to stop for new SPE threads during Cell/B.E. debugging. | |
4225 | ||
4226 | set spu auto-flush-cache | |
4227 | show spu auto-flush-cache | |
4228 | Control whether to automatically flush the software-managed cache | |
4229 | during Cell/B.E. debugging. | |
4230 | ||
4231 | set sh calling-convention | |
4232 | show sh calling-convention | |
4233 | Control the calling convention used when calling SH target functions. | |
4234 | ||
4235 | set debug timestamp | |
4236 | show debug timestamp | |
4237 | Control display of timestamps with GDB debugging output. | |
4238 | ||
4239 | set disassemble-next-line | |
4240 | show disassemble-next-line | |
4241 | Control display of disassembled source lines or instructions when | |
4242 | the debuggee stops. | |
4243 | ||
4244 | set remote noack-packet | |
4245 | show remote noack-packet | |
4246 | Set/show the use of remote protocol QStartNoAckMode packet. See above | |
4247 | under "New remote packets." | |
4248 | ||
4249 | set remote query-attached-packet | |
4250 | show remote query-attached-packet | |
4251 | Control use of remote protocol `qAttached' (query-attached) packet. | |
4252 | ||
4253 | set remote read-siginfo-object | |
4254 | show remote read-siginfo-object | |
4255 | Control use of remote protocol `qXfer:siginfo:read' (read-siginfo-object) | |
4256 | packet. | |
4257 | ||
4258 | set remote write-siginfo-object | |
4259 | show remote write-siginfo-object | |
4260 | Control use of remote protocol `qXfer:siginfo:write' (write-siginfo-object) | |
4261 | packet. | |
4262 | ||
4263 | set remote reverse-continue | |
4264 | show remote reverse-continue | |
4265 | Control use of remote protocol 'bc' (reverse-continue) packet. | |
4266 | ||
4267 | set remote reverse-step | |
4268 | show remote reverse-step | |
4269 | Control use of remote protocol 'bs' (reverse-step) packet. | |
4270 | ||
4271 | set displaced-stepping | |
4272 | show displaced-stepping | |
4273 | Control displaced stepping mode. Displaced stepping is a way to | |
4274 | single-step over breakpoints without removing them from the debuggee. | |
4275 | Also known as "out-of-line single-stepping". | |
4276 | ||
4277 | set debug displaced | |
4278 | show debug displaced | |
4279 | Control display of debugging info for displaced stepping. | |
4280 | ||
4281 | maint set internal-error | |
4282 | maint show internal-error | |
4283 | Control what GDB does when an internal error is detected. | |
4284 | ||
4285 | maint set internal-warning | |
4286 | maint show internal-warning | |
4287 | Control what GDB does when an internal warning is detected. | |
4288 | ||
4289 | set exec-wrapper | |
4290 | show exec-wrapper | |
4291 | unset exec-wrapper | |
4292 | Use a wrapper program to launch programs for debugging. | |
4293 | ||
4294 | set multiple-symbols (all|ask|cancel) | |
4295 | show multiple-symbols | |
4296 | The value of this variable can be changed to adjust the debugger behavior | |
4297 | when an expression or a breakpoint location contains an ambiguous symbol | |
4298 | name (an overloaded function name, for instance). | |
4299 | ||
4300 | set breakpoint always-inserted | |
4301 | show breakpoint always-inserted | |
4302 | Keep breakpoints always inserted in the target, as opposed to inserting | |
4303 | them when resuming the target, and removing them when the target stops. | |
4304 | This option can improve debugger performance on slow remote targets. | |
4305 | ||
4306 | set arm fallback-mode (arm|thumb|auto) | |
4307 | show arm fallback-mode | |
4308 | set arm force-mode (arm|thumb|auto) | |
4309 | show arm force-mode | |
4310 | These commands control how ARM GDB determines whether instructions | |
4311 | are ARM or Thumb. The default for both settings is auto, which uses | |
4312 | the current CPSR value for instructions without symbols; previous | |
4313 | versions of GDB behaved as if "set arm fallback-mode arm". | |
4314 | ||
4315 | set disable-randomization | |
4316 | show disable-randomization | |
4317 | Standalone programs run with the virtual address space randomization enabled | |
4318 | by default on some platforms. This option keeps the addresses stable across | |
4319 | multiple debugging sessions. | |
4320 | ||
4321 | set non-stop | |
4322 | show non-stop | |
4323 | Control whether other threads are stopped or not when some thread hits | |
4324 | a breakpoint. | |
4325 | ||
4326 | set target-async | |
4327 | show target-async | |
4328 | Requests that asynchronous execution is enabled in the target, if available. | |
4329 | In this case, it's possible to resume target in the background, and interact | |
4330 | with GDB while the target is running. "show target-async" displays the | |
4331 | current state of asynchronous execution of the target. | |
4332 | ||
4333 | set target-wide-charset | |
4334 | show target-wide-charset | |
4335 | The target-wide-charset is the name of the character set that GDB | |
4336 | uses when printing characters whose type is wchar_t. | |
4337 | ||
4338 | set tcp auto-retry (on|off) | |
4339 | show tcp auto-retry | |
4340 | set tcp connect-timeout | |
4341 | show tcp connect-timeout | |
4342 | These commands allow GDB to retry failed TCP connections to a remote stub | |
4343 | with a specified timeout period; this is useful if the stub is launched | |
4344 | in parallel with GDB but may not be ready to accept connections immediately. | |
4345 | ||
4346 | set libthread-db-search-path | |
4347 | show libthread-db-search-path | |
4348 | Control list of directories which GDB will search for appropriate | |
4349 | libthread_db. | |
4350 | ||
4351 | set schedule-multiple (on|off) | |
4352 | show schedule-multiple | |
4353 | Allow GDB to resume all threads of all processes or only threads of | |
4354 | the current process. | |
4355 | ||
4356 | set stack-cache | |
4357 | show stack-cache | |
4358 | Use more aggressive caching for accesses to the stack. This improves | |
4359 | performance of remote debugging (particularly backtraces) without | |
4360 | affecting correctness. | |
4361 | ||
4362 | set interactive-mode (on|off|auto) | |
4363 | show interactive-mode | |
4364 | Control whether GDB runs in interactive mode (on) or not (off). | |
4365 | When in interactive mode, GDB waits for the user to answer all | |
4366 | queries. Otherwise, GDB does not wait and assumes the default | |
4367 | answer. When set to auto (the default), GDB determines which | |
4368 | mode to use based on the stdin settings. | |
4369 | ||
4370 | * Removed commands | |
4371 | ||
4372 | info forks | |
4373 | For program forks, this is replaced by the new more generic `info | |
4374 | inferiors' command. To list checkpoints, you can still use the | |
4375 | `info checkpoints' command, which was an alias for the `info forks' | |
4376 | command. | |
4377 | ||
4378 | fork NUM | |
4379 | Replaced by the new `inferior' command. To switch between | |
4380 | checkpoints, you can still use the `restart' command, which was an | |
4381 | alias for the `fork' command. | |
4382 | ||
4383 | process PID | |
4384 | This is removed, since some targets don't have a notion of | |
4385 | processes. To switch between processes, you can still use the | |
4386 | `inferior' command using GDB's own inferior number. | |
4387 | ||
4388 | delete fork NUM | |
4389 | For program forks, this is replaced by the new more generic `kill | |
4390 | inferior' command. To delete a checkpoint, you can still use the | |
4391 | `delete checkpoint' command, which was an alias for the `delete | |
4392 | fork' command. | |
4393 | ||
4394 | detach fork NUM | |
4395 | For program forks, this is replaced by the new more generic `detach | |
4396 | inferior' command. To detach a checkpoint, you can still use the | |
4397 | `detach checkpoint' command, which was an alias for the `detach | |
4398 | fork' command. | |
4399 | ||
4400 | * New native configurations | |
4401 | ||
4402 | x86/x86_64 Darwin i[34567]86-*-darwin* | |
4403 | ||
4404 | x86_64 MinGW x86_64-*-mingw* | |
4405 | ||
4406 | * New targets | |
4407 | ||
4408 | Lattice Mico32 lm32-* | |
4409 | x86 DICOS i[34567]86-*-dicos* | |
4410 | x86_64 DICOS x86_64-*-dicos* | |
4411 | S+core 3 score-*-* | |
4412 | ||
4413 | * The GDB remote stub, gdbserver, now supports x86 Windows CE | |
4414 | (mingw32ce) debugging. | |
4415 | ||
4416 | * Removed commands | |
4417 | ||
4418 | catch load | |
4419 | catch unload | |
4420 | These commands were actually not implemented on any target. | |
4421 | ||
4422 | *** Changes in GDB 6.8 | |
4423 | ||
4424 | * New native configurations | |
4425 | ||
4426 | NetBSD/hppa hppa*-*netbsd* | |
4427 | Xtensa GNU/Linux xtensa*-*-linux* | |
4428 | ||
4429 | * New targets | |
4430 | ||
4431 | NetBSD/hppa hppa*-*-netbsd* | |
4432 | Xtensa GNU/Lunux xtensa*-*-linux* | |
4433 | ||
4434 | * Change in command line behavior -- corefiles vs. process ids. | |
4435 | ||
4436 | When the '-p NUMBER' or '--pid NUMBER' options are used, and | |
4437 | attaching to process NUMBER fails, GDB no longer attempts to open a | |
4438 | core file named NUMBER. Attaching to a program using the -c option | |
4439 | is no longer supported. Instead, use the '-p' or '--pid' options. | |
4440 | ||
4441 | * GDB can now be built as a native debugger for debugging Windows x86 | |
4442 | (mingw32) Portable Executable (PE) programs. | |
4443 | ||
4444 | * Pending breakpoints no longer change their number when their address | |
4445 | is resolved. | |
4446 | ||
4447 | * GDB now supports breakpoints with multiple locations, | |
4448 | including breakpoints on C++ constructors, inside C++ templates, | |
4449 | and in inlined functions. | |
4450 | ||
4451 | * GDB's ability to debug optimized code has been improved. GDB more | |
4452 | accurately identifies function bodies and lexical blocks that occupy | |
4453 | more than one contiguous range of addresses. | |
4454 | ||
4455 | * Target descriptions can now describe registers for PowerPC. | |
4456 | ||
4457 | * The GDB remote stub, gdbserver, now supports the AltiVec and SPE | |
4458 | registers on PowerPC targets. | |
4459 | ||
4460 | * The GDB remote stub, gdbserver, now supports thread debugging on GNU/Linux | |
4461 | targets even when the libthread_db library is not available. | |
4462 | ||
4463 | * The GDB remote stub, gdbserver, now supports the new file transfer | |
4464 | commands (remote put, remote get, and remote delete). | |
4465 | ||
4466 | * The GDB remote stub, gdbserver, now supports run and attach in | |
4467 | extended-remote mode. | |
4468 | ||
4469 | * hppa*64*-*-hpux11* target broken | |
4470 | The debugger is unable to start a program and fails with the following | |
4471 | error: "Error trying to get information about dynamic linker". | |
4472 | The gdb-6.7 release is also affected. | |
4473 | ||
4474 | * GDB now supports the --enable-targets= configure option to allow | |
4475 | building a single GDB executable that supports multiple remote | |
4476 | target architectures. | |
4477 | ||
4478 | * GDB now supports debugging C and C++ programs which use the | |
4479 | Decimal Floating Point extension. In addition, the PowerPC target | |
4480 | now has a set of pseudo-registers to inspect decimal float values | |
4481 | stored in two consecutive float registers. | |
4482 | ||
4483 | * The -break-insert MI command can optionally create pending | |
4484 | breakpoints now. | |
4485 | ||
4486 | * Improved support for debugging Ada | |
4487 | Many improvements to the Ada language support have been made. These | |
4488 | include: | |
4489 | - Better support for Ada2005 interface types | |
4490 | - Improved handling of arrays and slices in general | |
4491 | - Better support for Taft-amendment types | |
4492 | - The '{type} ADDRESS' expression is now allowed on the left hand-side | |
4493 | of an assignment | |
4494 | - Improved command completion in Ada | |
4495 | - Several bug fixes | |
4496 | ||
4497 | * GDB on GNU/Linux and HP/UX can now debug through "exec" of a new | |
4498 | process. | |
4499 | ||
4500 | * New commands | |
4501 | ||
4502 | set print frame-arguments (all|scalars|none) | |
4503 | show print frame-arguments | |
4504 | The value of this variable can be changed to control which argument | |
4505 | values should be printed by the debugger when displaying a frame. | |
4506 | ||
4507 | remote put | |
4508 | remote get | |
4509 | remote delete | |
4510 | Transfer files to and from a remote target, and delete remote files. | |
4511 | ||
4512 | * New MI commands | |
4513 | ||
4514 | -target-file-put | |
4515 | -target-file-get | |
4516 | -target-file-delete | |
4517 | Transfer files to and from a remote target, and delete remote files. | |
4518 | ||
4519 | * New remote packets | |
4520 | ||
4521 | vFile:open: | |
4522 | vFile:close: | |
4523 | vFile:pread: | |
4524 | vFile:pwrite: | |
4525 | vFile:unlink: | |
4526 | Open, close, read, write, and delete files on the remote system. | |
4527 | ||
4528 | vAttach | |
4529 | Attach to an existing process on the remote system, in extended-remote | |
4530 | mode. | |
4531 | ||
4532 | vRun | |
4533 | Run a new process on the remote system, in extended-remote mode. | |
4534 | ||
4535 | *** Changes in GDB 6.7 | |
4536 | ||
4537 | * Resolved 101 resource leaks, null pointer dereferences, etc. in gdb, | |
4538 | bfd, libiberty and opcodes, as revealed by static analysis donated by | |
4539 | Coverity, Inc. (http://scan.coverity.com). | |
4540 | ||
4541 | * When looking up multiply-defined global symbols, GDB will now prefer the | |
4542 | symbol definition in the current shared library if it was built using the | |
4543 | -Bsymbolic linker option. | |
4544 | ||
4545 | * When the Text User Interface (TUI) is not configured, GDB will now | |
4546 | recognize the -tui command-line option and print a message that the TUI | |
4547 | is not supported. | |
4548 | ||
4549 | * The GDB remote stub, gdbserver, now has lower overhead for high | |
4550 | frequency signals (e.g. SIGALRM) via the QPassSignals packet. | |
4551 | ||
4552 | * GDB for MIPS targets now autodetects whether a remote target provides | |
4553 | 32-bit or 64-bit register values. | |
4554 | ||
4555 | * Support for C++ member pointers has been improved. | |
4556 | ||
4557 | * GDB now understands XML target descriptions, which specify the | |
4558 | target's overall architecture. GDB can read a description from | |
4559 | a local file or over the remote serial protocol. | |
4560 | ||
4561 | * Vectors of single-byte data use a new integer type which is not | |
4562 | automatically displayed as character or string data. | |
4563 | ||
4564 | * The /s format now works with the print command. It displays | |
4565 | arrays of single-byte integers and pointers to single-byte integers | |
4566 | as strings. | |
4567 | ||
4568 | * Target descriptions can now describe target-specific registers, | |
4569 | for architectures which have implemented the support (currently | |
4570 | only ARM, M68K, and MIPS). | |
4571 | ||
4572 | * GDB and the GDB remote stub, gdbserver, now support the XScale | |
4573 | iWMMXt coprocessor. | |
4574 | ||
4575 | * The GDB remote stub, gdbserver, has been updated to support | |
4576 | ARM Windows CE (mingw32ce) debugging, and GDB Windows CE support | |
4577 | has been rewritten to use the standard GDB remote protocol. | |
4578 | ||
4579 | * GDB can now step into C++ functions which are called through thunks. | |
4580 | ||
4581 | * GDB for the Cell/B.E. SPU now supports overlay debugging. | |
4582 | ||
4583 | * The GDB remote protocol "qOffsets" packet can now honor ELF segment | |
4584 | layout. It also supports a TextSeg= and DataSeg= response when only | |
4585 | segment base addresses (rather than offsets) are available. | |
4586 | ||
4587 | * The /i format now outputs any trailing branch delay slot instructions | |
4588 | immediately following the last instruction within the count specified. | |
4589 | ||
4590 | * The GDB remote protocol "T" stop reply packet now supports a | |
4591 | "library" response. Combined with the new "qXfer:libraries:read" | |
4592 | packet, this response allows GDB to debug shared libraries on targets | |
4593 | where the operating system manages the list of loaded libraries (e.g. | |
4594 | Windows and SymbianOS). | |
4595 | ||
4596 | * The GDB remote stub, gdbserver, now supports dynamic link libraries | |
4597 | (DLLs) on Windows and Windows CE targets. | |
4598 | ||
4599 | * GDB now supports a faster verification that a .debug file matches its binary | |
4600 | according to its build-id signature, if the signature is present. | |
4601 | ||
4602 | * New commands | |
4603 | ||
4604 | set remoteflow | |
4605 | show remoteflow | |
4606 | Enable or disable hardware flow control (RTS/CTS) on the serial port | |
4607 | when debugging using remote targets. | |
4608 | ||
4609 | set mem inaccessible-by-default | |
4610 | show mem inaccessible-by-default | |
4611 | If the target supplies a memory map, for instance via the remote | |
4612 | protocol's "qXfer:memory-map:read" packet, setting this variable | |
4613 | prevents GDB from accessing memory outside the memory map. This | |
4614 | is useful for targets with memory mapped registers or which react | |
4615 | badly to accesses of unmapped address space. | |
4616 | ||
4617 | set breakpoint auto-hw | |
4618 | show breakpoint auto-hw | |
4619 | If the target supplies a memory map, for instance via the remote | |
4620 | protocol's "qXfer:memory-map:read" packet, setting this variable | |
4621 | lets GDB use hardware breakpoints automatically for memory regions | |
4622 | where it can not use software breakpoints. This covers both the | |
4623 | "break" command and internal breakpoints used for other commands | |
4624 | including "next" and "finish". | |
4625 | ||
4626 | catch exception | |
4627 | catch exception unhandled | |
4628 | Stop the program execution when Ada exceptions are raised. | |
4629 | ||
4630 | catch assert | |
4631 | Stop the program execution when an Ada assertion failed. | |
4632 | ||
4633 | set sysroot | |
4634 | show sysroot | |
4635 | Set an alternate system root for target files. This is a more | |
4636 | general version of "set solib-absolute-prefix", which is now | |
4637 | an alias to "set sysroot". | |
4638 | ||
4639 | info spu | |
4640 | Provide extended SPU facility status information. This set of | |
4641 | commands is available only when debugging the Cell/B.E. SPU | |
4642 | architecture. | |
4643 | ||
4644 | * New native configurations | |
4645 | ||
4646 | OpenBSD/sh sh*-*openbsd* | |
4647 | ||
4648 | set tdesc filename | |
4649 | unset tdesc filename | |
4650 | show tdesc filename | |
4651 | Use the specified local file as an XML target description, and do | |
4652 | not query the target for its built-in description. | |
4653 | ||
4654 | * New targets | |
4655 | ||
4656 | OpenBSD/sh sh*-*-openbsd* | |
4657 | MIPS64 GNU/Linux (gdbserver) mips64-linux-gnu | |
4658 | Toshiba Media Processor mep-elf | |
4659 | ||
4660 | * New remote packets | |
4661 | ||
4662 | QPassSignals: | |
4663 | Ignore the specified signals; pass them directly to the debugged program | |
4664 | without stopping other threads or reporting them to GDB. | |
4665 | ||
4666 | qXfer:features:read: | |
4667 | Read an XML target description from the target, which describes its | |
4668 | features. | |
4669 | ||
4670 | qXfer:spu:read: | |
4671 | qXfer:spu:write: | |
4672 | Read or write contents of an spufs file on the target system. These | |
4673 | packets are available only on the Cell/B.E. SPU architecture. | |
4674 | ||
4675 | qXfer:libraries:read: | |
4676 | Report the loaded shared libraries. Combined with new "T" packet | |
4677 | response, this packet allows GDB to debug shared libraries on | |
4678 | targets where the operating system manages the list of loaded | |
4679 | libraries (e.g. Windows and SymbianOS). | |
4680 | ||
4681 | * Removed targets | |
4682 | ||
4683 | Support for these obsolete configurations has been removed. | |
4684 | ||
4685 | alpha*-*-osf1* | |
4686 | alpha*-*-osf2* | |
4687 | d10v-*-* | |
4688 | hppa*-*-hiux* | |
4689 | i[34567]86-ncr-* | |
4690 | i[34567]86-*-dgux* | |
4691 | i[34567]86-*-lynxos* | |
4692 | i[34567]86-*-netware* | |
4693 | i[34567]86-*-sco3.2v5* | |
4694 | i[34567]86-*-sco3.2v4* | |
4695 | i[34567]86-*-sco* | |
4696 | i[34567]86-*-sysv4.2* | |
4697 | i[34567]86-*-sysv4* | |
4698 | i[34567]86-*-sysv5* | |
4699 | i[34567]86-*-unixware2* | |
4700 | i[34567]86-*-unixware* | |
4701 | i[34567]86-*-sysv* | |
4702 | i[34567]86-*-isc* | |
4703 | m68*-cisco*-* | |
4704 | m68*-tandem-* | |
4705 | mips*-*-pe | |
4706 | rs6000-*-lynxos* | |
4707 | sh*-*-pe | |
4708 | ||
4709 | * Other removed features | |
4710 | ||
4711 | target abug | |
4712 | target cpu32bug | |
4713 | target est | |
4714 | target rom68k | |
4715 | ||
4716 | Various m68k-only ROM monitors. | |
4717 | ||
4718 | target hms | |
4719 | target e7000 | |
4720 | target sh3 | |
4721 | target sh3e | |
4722 | ||
4723 | Various Renesas ROM monitors and debugging interfaces for SH and | |
4724 | H8/300. | |
4725 | ||
4726 | target ocd | |
4727 | ||
4728 | Support for a Macraigor serial interface to on-chip debugging. | |
4729 | GDB does not directly support the newer parallel or USB | |
4730 | interfaces. | |
4731 | ||
4732 | DWARF 1 support | |
4733 | ||
4734 | A debug information format. The predecessor to DWARF 2 and | |
4735 | DWARF 3, which are still supported. | |
4736 | ||
4737 | Support for the HP aCC compiler on HP-UX/PA-RISC | |
4738 | ||
4739 | SOM-encapsulated symbolic debugging information, automatic | |
4740 | invocation of pxdb, and the aCC custom C++ ABI. This does not | |
4741 | affect HP-UX for Itanium or GCC for HP-UX/PA-RISC. Code compiled | |
4742 | with aCC can still be debugged on an assembly level. | |
4743 | ||
4744 | MIPS ".pdr" sections | |
4745 | ||
4746 | A MIPS-specific format used to describe stack frame layout | |
4747 | in debugging information. | |
4748 | ||
4749 | Scheme support | |
4750 | ||
4751 | GDB could work with an older version of Guile to debug | |
4752 | the interpreter and Scheme programs running in it. | |
4753 | ||
4754 | set mips stack-arg-size | |
4755 | set mips saved-gpreg-size | |
4756 | ||
4757 | Use "set mips abi" to control parameter passing for MIPS. | |
4758 | ||
4759 | *** Changes in GDB 6.6 | |
4760 | ||
4761 | * New targets | |
4762 | ||
4763 | Xtensa xtensa-elf | |
4764 | Cell Broadband Engine SPU spu-elf | |
4765 | ||
4766 | * GDB can now be configured as a cross-debugger targeting native Windows | |
4767 | (mingw32) or Cygwin. It can communicate with a remote debugging stub | |
4768 | running on a Windows system over TCP/IP to debug Windows programs. | |
4769 | ||
4770 | * The GDB remote stub, gdbserver, has been updated to support Windows and | |
4771 | Cygwin debugging. Both single-threaded and multi-threaded programs are | |
4772 | supported. | |
4773 | ||
4774 | * The "set trust-readonly-sections" command works again. This command was | |
4775 | broken in GDB 6.3, 6.4, and 6.5. | |
4776 | ||
4777 | * The "load" command now supports writing to flash memory, if the remote | |
4778 | stub provides the required support. | |
4779 | ||
4780 | * Support for GNU/Linux Thread Local Storage (TLS, per-thread variables) no | |
4781 | longer requires symbolic debug information (e.g. DWARF-2). | |
4782 | ||
4783 | * New commands | |
4784 | ||
4785 | set substitute-path | |
4786 | unset substitute-path | |
4787 | show substitute-path | |
4788 | Manage a list of substitution rules that GDB uses to rewrite the name | |
4789 | of the directories where the sources are located. This can be useful | |
4790 | for instance when the sources were moved to a different location | |
4791 | between compilation and debugging. | |
4792 | ||
4793 | set trace-commands | |
4794 | show trace-commands | |
4795 | Print each CLI command as it is executed. Each command is prefixed with | |
4796 | a number of `+' symbols representing the nesting depth. | |
4797 | The source command now has a `-v' option to enable the same feature. | |
4798 | ||
4799 | * REMOVED features | |
4800 | ||
4801 | The ARM Demon monitor support (RDP protocol, "target rdp"). | |
4802 | ||
4803 | Kernel Object Display, an embedded debugging feature which only worked with | |
4804 | an obsolete version of Cisco IOS. | |
4805 | ||
4806 | The 'set download-write-size' and 'show download-write-size' commands. | |
4807 | ||
4808 | * New remote packets | |
4809 | ||
4810 | qSupported: | |
4811 | Tell a stub about GDB client features, and request remote target features. | |
4812 | The first feature implemented is PacketSize, which allows the target to | |
4813 | specify the size of packets it can handle - to minimize the number of | |
4814 | packets required and improve performance when connected to a remote | |
4815 | target. | |
4816 | ||
4817 | qXfer:auxv:read: | |
4818 | Fetch an OS auxilliary vector from the remote stub. This packet is a | |
4819 | more efficient replacement for qPart:auxv:read. | |
4820 | ||
4821 | qXfer:memory-map:read: | |
4822 | Fetch a memory map from the remote stub, including information about | |
4823 | RAM, ROM, and flash memory devices. | |
4824 | ||
4825 | vFlashErase: | |
4826 | vFlashWrite: | |
4827 | vFlashDone: | |
4828 | Erase and program a flash memory device. | |
4829 | ||
4830 | * Removed remote packets | |
4831 | ||
4832 | qPart:auxv:read: | |
4833 | This packet has been replaced by qXfer:auxv:read. Only GDB 6.4 and 6.5 | |
4834 | used it, and only gdbserver implemented it. | |
4835 | ||
4836 | *** Changes in GDB 6.5 | |
4837 | ||
4838 | * New targets | |
4839 | ||
4840 | Renesas M32C/M16C m32c-elf | |
4841 | ||
4842 | Morpho Technologies ms1 ms1-elf | |
4843 | ||
4844 | * New commands | |
4845 | ||
4846 | init-if-undefined Initialize a convenience variable, but | |
4847 | only if it doesn't already have a value. | |
4848 | ||
4849 | The following commands are presently only implemented for native GNU/Linux: | |
4850 | ||
4851 | checkpoint Save a snapshot of the program state. | |
4852 | ||
4853 | restart <n> Return the program state to a | |
4854 | previously saved state. | |
4855 | ||
4856 | info checkpoints List currently saved checkpoints. | |
4857 | ||
4858 | delete-checkpoint <n> Delete a previously saved checkpoint. | |
4859 | ||
4860 | set|show detach-on-fork Tell gdb whether to detach from a newly | |
4861 | forked process, or to keep debugging it. | |
4862 | ||
4863 | info forks List forks of the user program that | |
4864 | are available to be debugged. | |
4865 | ||
4866 | fork <n> Switch to debugging one of several | |
4867 | forks of the user program that are | |
4868 | available to be debugged. | |
4869 | ||
4870 | delete-fork <n> Delete a fork from the list of forks | |
4871 | that are available to be debugged (and | |
4872 | kill the forked process). | |
4873 | ||
4874 | detach-fork <n> Delete a fork from the list of forks | |
4875 | that are available to be debugged (and | |
4876 | allow the process to continue). | |
4877 | ||
4878 | * New architecture | |
4879 | ||
4880 | Morpho Technologies ms2 ms1-elf | |
4881 | ||
4882 | * Improved Windows host support | |
4883 | ||
4884 | GDB now builds as a cross debugger hosted on i686-mingw32, including | |
4885 | native console support, and remote communications using either | |
4886 | network sockets or serial ports. | |
4887 | ||
4888 | * Improved Modula-2 language support | |
4889 | ||
4890 | GDB can now print most types in the Modula-2 syntax. This includes: | |
4891 | basic types, set types, record types, enumerated types, range types, | |
4892 | pointer types and ARRAY types. Procedure var parameters are correctly | |
4893 | printed and hexadecimal addresses and character constants are also | |
4894 | written in the Modula-2 syntax. Best results can be obtained by using | |
4895 | GNU Modula-2 together with the -gdwarf-2 command line option. | |
4896 | ||
4897 | * REMOVED features | |
4898 | ||
4899 | The ARM rdi-share module. | |
4900 | ||
4901 | The Netware NLM debug server. | |
4902 | ||
4903 | *** Changes in GDB 6.4 | |
4904 | ||
4905 | * New native configurations | |
4906 | ||
4907 | OpenBSD/arm arm*-*-openbsd* | |
4908 | OpenBSD/mips64 mips64-*-openbsd* | |
4909 | ||
4910 | * New targets | |
4911 | ||
4912 | Morpho Technologies ms1 ms1-elf | |
4913 | ||
4914 | * New command line options | |
4915 | ||
4916 | --batch-silent As for --batch, but totally silent. | |
4917 | --return-child-result The debugger will exist with the same value | |
4918 | the child (debugged) program exited with. | |
4919 | --eval-command COMMAND, -ex COMMAND | |
4920 | Execute a single GDB CLI command. This may be | |
4921 | specified multiple times and in conjunction | |
4922 | with the --command (-x) option. | |
4923 | ||
4924 | * Deprecated commands removed | |
4925 | ||
4926 | The following commands, that were deprecated in 2000, have been | |
4927 | removed: | |
4928 | ||
4929 | Command Replacement | |
4930 | set|show arm disassembly-flavor set|show arm disassembler | |
4931 | othernames set arm disassembler | |
4932 | set|show remotedebug set|show debug remote | |
4933 | set|show archdebug set|show debug arch | |
4934 | set|show eventdebug set|show debug event | |
4935 | regs info registers | |
4936 | ||
4937 | * New BSD user-level threads support | |
4938 | ||
4939 | It is now possible to debug programs using the user-level threads | |
4940 | library on OpenBSD and FreeBSD. Currently supported (target) | |
4941 | configurations are: | |
4942 | ||
4943 | FreeBSD/amd64 x86_64-*-freebsd* | |
4944 | FreeBSD/i386 i386-*-freebsd* | |
4945 | OpenBSD/i386 i386-*-openbsd* | |
4946 | ||
4947 | Note that the new kernel threads libraries introduced in FreeBSD 5.x | |
4948 | are not yet supported. | |
4949 | ||
4950 | * New support for Matsushita MN10300 w/sim added | |
4951 | (Work in progress). mn10300-elf. | |
4952 | ||
4953 | * REMOVED configurations and files | |
4954 | ||
4955 | VxWorks and the XDR protocol *-*-vxworks | |
4956 | Motorola MCORE mcore-*-* | |
4957 | National Semiconductor NS32000 ns32k-*-* | |
4958 | ||
4959 | * New "set print array-indexes" command | |
4960 | ||
4961 | After turning this setting "on", GDB prints the index of each element | |
4962 | when displaying arrays. The default is "off" to preserve the previous | |
4963 | behavior. | |
4964 | ||
4965 | * VAX floating point support | |
4966 | ||
4967 | GDB now supports the not-quite-ieee VAX F and D floating point formats. | |
4968 | ||
4969 | * User-defined command support | |
4970 | ||
4971 | In addition to using $arg0..$arg9 for argument passing, it is now possible | |
4972 | to use $argc to determine now many arguments have been passed. See the | |
4973 | section on user-defined commands in the user manual for more information. | |
4974 | ||
4975 | *** Changes in GDB 6.3: | |
4976 | ||
4977 | * New command line option | |
4978 | ||
4979 | GDB now accepts -l followed by a number to set the timeout for remote | |
4980 | debugging. | |
4981 | ||
4982 | * GDB works with GCC -feliminate-dwarf2-dups | |
4983 | ||
4984 | GDB now supports a more compact representation of DWARF-2 debug | |
4985 | information using DW_FORM_ref_addr references. These are produced | |
4986 | by GCC with the option -feliminate-dwarf2-dups and also by some | |
4987 | proprietary compilers. With GCC, you must use GCC 3.3.4 or later | |
4988 | to use -feliminate-dwarf2-dups. | |
4989 | ||
4990 | * Internationalization | |
4991 | ||
4992 | When supported by the host system, GDB will be built with | |
4993 | internationalization (libintl). The task of marking up the sources is | |
4994 | continued, we're looking forward to our first translation. | |
4995 | ||
4996 | * Ada | |
4997 | ||
4998 | Initial support for debugging programs compiled with the GNAT | |
4999 | implementation of the Ada programming language has been integrated | |
5000 | into GDB. In this release, support is limited to expression evaluation. | |
5001 | ||
5002 | * New native configurations | |
5003 | ||
5004 | GNU/Linux/m32r m32r-*-linux-gnu | |
5005 | ||
5006 | * Remote 'p' packet | |
5007 | ||
5008 | GDB's remote protocol now includes support for the 'p' packet. This | |
5009 | packet is used to fetch individual registers from a remote inferior. | |
5010 | ||
5011 | * END-OF-LIFE registers[] compatibility module | |
5012 | ||
5013 | GDB's internal register infrastructure has been completely rewritten. | |
5014 | The new infrastructure making possible the implementation of key new | |
5015 | features including 32x64 (e.g., 64-bit amd64 GDB debugging a 32-bit | |
5016 | i386 application). | |
5017 | ||
5018 | GDB 6.3 will be the last release to include the the registers[] | |
5019 | compatibility module that allowed out-of-date configurations to | |
5020 | continue to work. This change directly impacts the following | |
5021 | configurations: | |
5022 | ||
5023 | hppa-*-hpux | |
5024 | ia64-*-aix | |
5025 | mips-*-irix* | |
5026 | *-*-lynx | |
5027 | mips-*-linux-gnu | |
5028 | sds protocol | |
5029 | xdr protocol | |
5030 | powerpc bdm protocol | |
5031 | ||
5032 | Unless there is activity to revive these configurations, they will be | |
5033 | made OBSOLETE in GDB 6.4, and REMOVED from GDB 6.5. | |
5034 | ||
5035 | * OBSOLETE configurations and files | |
5036 | ||
5037 | Configurations that have been declared obsolete in this release have | |
5038 | been commented out. Unless there is activity to revive these | |
5039 | configurations, the next release of GDB will have their sources | |
5040 | permanently REMOVED. | |
5041 | ||
5042 | h8300-*-* | |
5043 | mcore-*-* | |
5044 | mn10300-*-* | |
5045 | ns32k-*-* | |
5046 | sh64-*-* | |
5047 | v850-*-* | |
5048 | ||
5049 | *** Changes in GDB 6.2.1: | |
5050 | ||
5051 | * MIPS `break main; run' gave an heuristic-fence-post warning | |
5052 | ||
5053 | When attempting to run even a simple program, a warning about | |
5054 | heuristic-fence-post being hit would be reported. This problem has | |
5055 | been fixed. | |
5056 | ||
5057 | * MIPS IRIX 'long double' crashed GDB | |
5058 | ||
5059 | When examining a long double variable, GDB would get a segmentation | |
5060 | fault. The crash has been fixed (but GDB 6.2 cannot correctly examine | |
5061 | IRIX long double values). | |
5062 | ||
5063 | * VAX and "next" | |
5064 | ||
5065 | A bug in the VAX stack code was causing problems with the "next" | |
5066 | command. This problem has been fixed. | |
5067 | ||
5068 | *** Changes in GDB 6.2: | |
5069 | ||
5070 | * Fix for ``many threads'' | |
5071 | ||
5072 | On GNU/Linux systems that use the NPTL threads library, a program | |
5073 | rapidly creating and deleting threads would confuse GDB leading to the | |
5074 | error message: | |
5075 | ||
5076 | ptrace: No such process. | |
5077 | thread_db_get_info: cannot get thread info: generic error | |
5078 | ||
5079 | This problem has been fixed. | |
5080 | ||
5081 | * "-async" and "-noasync" options removed. | |
5082 | ||
5083 | Support for the broken "-noasync" option has been removed (it caused | |
5084 | GDB to dump core). | |
5085 | ||
5086 | * New ``start'' command. | |
5087 | ||
5088 | This command runs the program until the begining of the main procedure. | |
5089 | ||
5090 | * New BSD Kernel Data Access Library (libkvm) interface | |
5091 | ||
5092 | Using ``target kvm'' it is now possible to debug kernel core dumps and | |
5093 | live kernel memory images on various FreeBSD, NetBSD and OpenBSD | |
5094 | platforms. Currently supported (native-only) configurations are: | |
5095 | ||
5096 | FreeBSD/amd64 x86_64-*-freebsd* | |
5097 | FreeBSD/i386 i?86-*-freebsd* | |
5098 | NetBSD/i386 i?86-*-netbsd* | |
5099 | NetBSD/m68k m68*-*-netbsd* | |
5100 | NetBSD/sparc sparc-*-netbsd* | |
5101 | OpenBSD/amd64 x86_64-*-openbsd* | |
5102 | OpenBSD/i386 i?86-*-openbsd* | |
5103 | OpenBSD/m68k m68*-openbsd* | |
5104 | OpenBSD/sparc sparc-*-openbsd* | |
5105 | ||
5106 | * Signal trampoline code overhauled | |
5107 | ||
5108 | Many generic problems with GDB's signal handling code have been fixed. | |
5109 | These include: backtraces through non-contiguous stacks; recognition | |
5110 | of sa_sigaction signal trampolines; backtrace from a NULL pointer | |
5111 | call; backtrace through a signal trampoline; step into and out of | |
5112 | signal handlers; and single-stepping in the signal trampoline. | |
5113 | ||
5114 | Please note that kernel bugs are a limiting factor here. These | |
5115 | features have been shown to work on an s390 GNU/Linux system that | |
5116 | include a 2.6.8-rc1 kernel. Ref PR breakpoints/1702. | |
5117 | ||
5118 | * Cygwin support for DWARF 2 added. | |
5119 | ||
5120 | * New native configurations | |
5121 | ||
5122 | GNU/Linux/hppa hppa*-*-linux* | |
5123 | OpenBSD/hppa hppa*-*-openbsd* | |
5124 | OpenBSD/m68k m68*-*-openbsd* | |
5125 | OpenBSD/m88k m88*-*-openbsd* | |
5126 | OpenBSD/powerpc powerpc-*-openbsd* | |
5127 | NetBSD/vax vax-*-netbsd* | |
5128 | OpenBSD/vax vax-*-openbsd* | |
5129 | ||
5130 | * END-OF-LIFE frame compatibility module | |
5131 | ||
5132 | GDB's internal frame infrastructure has been completely rewritten. | |
5133 | The new infrastructure making it possible to support key new features | |
5134 | including DWARF 2 Call Frame Information. To aid in the task of | |
5135 | migrating old configurations to this new infrastructure, a | |
5136 | compatibility module, that allowed old configurations to continue to | |
5137 | work, was also included. | |
5138 | ||
5139 | GDB 6.2 will be the last release to include this frame compatibility | |
5140 | module. This change directly impacts the following configurations: | |
5141 | ||
5142 | h8300-*-* | |
5143 | mcore-*-* | |
5144 | mn10300-*-* | |
5145 | ns32k-*-* | |
5146 | sh64-*-* | |
5147 | v850-*-* | |
5148 | xstormy16-*-* | |
5149 | ||
5150 | Unless there is activity to revive these configurations, they will be | |
5151 | made OBSOLETE in GDB 6.3, and REMOVED from GDB 6.4. | |
5152 | ||
5153 | * REMOVED configurations and files | |
5154 | ||
5155 | Sun 3, running SunOS 3 m68*-*-sunos3* | |
5156 | Sun 3, running SunOS 4 m68*-*-sunos4* | |
5157 | Sun 2, running SunOS 3 m68000-*-sunos3* | |
5158 | Sun 2, running SunOS 4 m68000-*-sunos4* | |
5159 | Motorola 680x0 running LynxOS m68*-*-lynxos* | |
5160 | AT&T 3b1/Unix pc m68*-att-* | |
5161 | Bull DPX2 (68k, System V release 3) m68*-bull-sysv* | |
5162 | decstation mips-dec-* mips-little-* | |
5163 | riscos mips-*-riscos* mips-*-sysv* | |
5164 | sonymips mips-sony-* | |
5165 | sysv mips*-*-sysv4* (IRIX 5/6 not included) | |
5166 | ||
5167 | *** Changes in GDB 6.1.1: | |
5168 | ||
5169 | * TUI (Text-mode User Interface) built-in (also included in GDB 6.1) | |
5170 | ||
5171 | The TUI (Text-mode User Interface) is now built as part of a default | |
5172 | GDB configuration. It is enabled by either selecting the TUI with the | |
5173 | command line option "-i=tui" or by running the separate "gdbtui" | |
5174 | program. For more information on the TUI, see the manual "Debugging | |
5175 | with GDB". | |
5176 | ||
5177 | * Pending breakpoint support (also included in GDB 6.1) | |
5178 | ||
5179 | Support has been added to allow you to specify breakpoints in shared | |
5180 | libraries that have not yet been loaded. If a breakpoint location | |
5181 | cannot be found, and the "breakpoint pending" option is set to auto, | |
5182 | GDB queries you if you wish to make the breakpoint pending on a future | |
5183 | shared-library load. If and when GDB resolves the breakpoint symbol, | |
5184 | the pending breakpoint is removed as one or more regular breakpoints | |
5185 | are created. | |
5186 | ||
5187 | Pending breakpoints are very useful for GCJ Java debugging. | |
5188 | ||
5189 | * Fixed ISO-C build problems | |
5190 | ||
5191 | The files bfd/elf-bfd.h, gdb/dictionary.c and gdb/types.c contained | |
5192 | non ISO-C code that stopped them being built using a more strict ISO-C | |
5193 | compiler (e.g., IBM's C compiler). | |
5194 | ||
5195 | * Fixed build problem on IRIX 5 | |
5196 | ||
5197 | Due to header problems with <sys/proc.h>, the file gdb/proc-api.c | |
5198 | wasn't able to compile compile on an IRIX 5 system. | |
5199 | ||
5200 | * Added execute permission to gdb/gdbserver/configure | |
5201 | ||
5202 | The shell script gdb/testsuite/gdb.stabs/configure lacked execute | |
5203 | permission. This bug would cause configure to fail on a number of | |
5204 | systems (Solaris, IRIX). Ref: server/519. | |
5205 | ||
5206 | * Fixed build problem on hpux2.0w-hp-hpux11.00 using the HP ANSI C compiler | |
5207 | ||
5208 | Older HPUX ANSI C compilers did not accept variable array sizes. somsolib.c | |
5209 | has been updated to use constant array sizes. | |
5210 | ||
5211 | * Fixed a panic in the DWARF Call Frame Info code on Solaris 2.7 | |
5212 | ||
5213 | GCC 3.3.2, on Solaris 2.7, includes the DW_EH_PE_funcrel encoding in | |
5214 | its generated DWARF Call Frame Info. This encoding was causing GDB to | |
5215 | panic, that panic has been fixed. Ref: gdb/1628. | |
5216 | ||
5217 | * Fixed a problem when examining parameters in shared library code. | |
5218 | ||
5219 | When examining parameters in optimized shared library code generated | |
5220 | by a mainline GCC, GDB would incorrectly report ``Variable "..." is | |
5221 | not available''. GDB now correctly displays the variable's value. | |
5222 | ||
5223 | *** Changes in GDB 6.1: | |
5224 | ||
5225 | * Removed --with-mmalloc | |
5226 | ||
5227 | Support for the mmalloc memory manager has been removed, as it | |
5228 | conflicted with the internal gdb byte cache. | |
5229 | ||
5230 | * Changes in AMD64 configurations | |
5231 | ||
5232 | The AMD64 target now includes the %cs and %ss registers. As a result | |
5233 | the AMD64 remote protocol has changed; this affects the floating-point | |
5234 | and SSE registers. If you rely on those registers for your debugging, | |
5235 | you should upgrade gdbserver on the remote side. | |
5236 | ||
5237 | * Revised SPARC target | |
5238 | ||
5239 | The SPARC target has been completely revised, incorporating the | |
5240 | FreeBSD/sparc64 support that was added for GDB 6.0. As a result | |
5241 | support for LynxOS and SunOS 4 has been dropped. Calling functions | |
5242 | from within GDB on operating systems with a non-executable stack | |
5243 | (Solaris, OpenBSD) now works. | |
5244 | ||
5245 | * New C++ demangler | |
5246 | ||
5247 | GDB has a new C++ demangler which does a better job on the mangled | |
5248 | names generated by current versions of g++. It also runs faster, so | |
5249 | with this and other changes gdb should now start faster on large C++ | |
5250 | programs. | |
5251 | ||
5252 | * DWARF 2 Location Expressions | |
5253 | ||
5254 | GDB support for location expressions has been extended to support function | |
5255 | arguments and frame bases. Older versions of GDB could crash when they | |
5256 | encountered these. | |
5257 | ||
5258 | * C++ nested types and namespaces | |
5259 | ||
5260 | GDB's support for nested types and namespaces in C++ has been | |
5261 | improved, especially if you use the DWARF 2 debugging format. (This | |
5262 | is the default for recent versions of GCC on most platforms.) | |
5263 | Specifically, if you have a class "Inner" defined within a class or | |
5264 | namespace "Outer", then GDB realizes that the class's name is | |
5265 | "Outer::Inner", not simply "Inner". This should greatly reduce the | |
5266 | frequency of complaints about not finding RTTI symbols. In addition, | |
5267 | if you are stopped at inside of a function defined within a namespace, | |
5268 | GDB modifies its name lookup accordingly. | |
5269 | ||
5270 | * New native configurations | |
5271 | ||
5272 | NetBSD/amd64 x86_64-*-netbsd* | |
5273 | OpenBSD/amd64 x86_64-*-openbsd* | |
5274 | OpenBSD/alpha alpha*-*-openbsd* | |
5275 | OpenBSD/sparc sparc-*-openbsd* | |
5276 | OpenBSD/sparc64 sparc64-*-openbsd* | |
5277 | ||
5278 | * New debugging protocols | |
5279 | ||
5280 | M32R with SDI protocol m32r-*-elf* | |
5281 | ||
5282 | * "set prompt-escape-char" command deleted. | |
5283 | ||
5284 | The command "set prompt-escape-char" has been deleted. This command, | |
5285 | and its very obscure effet on GDB's prompt, was never documented, | |
5286 | tested, nor mentioned in the NEWS file. | |
5287 | ||
5288 | * OBSOLETE configurations and files | |
5289 | ||
5290 | Configurations that have been declared obsolete in this release have | |
5291 | been commented out. Unless there is activity to revive these | |
5292 | configurations, the next release of GDB will have their sources | |
5293 | permanently REMOVED. | |
5294 | ||
5295 | Sun 3, running SunOS 3 m68*-*-sunos3* | |
5296 | Sun 3, running SunOS 4 m68*-*-sunos4* | |
5297 | Sun 2, running SunOS 3 m68000-*-sunos3* | |
5298 | Sun 2, running SunOS 4 m68000-*-sunos4* | |
5299 | Motorola 680x0 running LynxOS m68*-*-lynxos* | |
5300 | AT&T 3b1/Unix pc m68*-att-* | |
5301 | Bull DPX2 (68k, System V release 3) m68*-bull-sysv* | |
5302 | decstation mips-dec-* mips-little-* | |
5303 | riscos mips-*-riscos* mips-*-sysv* | |
5304 | sonymips mips-sony-* | |
5305 | sysv mips*-*-sysv4* (IRIX 5/6 not included) | |
5306 | ||
5307 | * REMOVED configurations and files | |
5308 | ||
5309 | SGI Irix-4.x mips-sgi-irix4 or iris4 | |
5310 | SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris | |
5311 | Z8000 simulator z8k-zilog-none or z8ksim | |
5312 | Matsushita MN10200 w/simulator mn10200-*-* | |
5313 | H8/500 simulator h8500-hitachi-hms or h8500hms | |
5314 | HP/PA running BSD hppa*-*-bsd* | |
5315 | HP/PA running OSF/1 hppa*-*-osf* | |
5316 | HP/PA Pro target hppa*-*-pro* | |
5317 | PMAX (MIPS) running Mach 3.0 mips*-*-mach3* | |
5318 | 386BSD i[3456]86-*-bsd* | |
5319 | Sequent family i[3456]86-sequent-sysv4* | |
5320 | i[3456]86-sequent-sysv* | |
5321 | i[3456]86-sequent-bsd* | |
5322 | SPARC running LynxOS sparc-*-lynxos* | |
5323 | SPARC running SunOS 4 sparc-*-sunos4* | |
5324 | Tsqware Sparclet sparclet-*-* | |
5325 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite | |
5326 | ||
5327 | *** Changes in GDB 6.0: | |
5328 | ||
5329 | * Objective-C | |
5330 | ||
5331 | Support for debugging the Objective-C programming language has been | |
5332 | integrated into GDB. | |
5333 | ||
5334 | * New backtrace mechanism (includes DWARF 2 Call Frame Information). | |
5335 | ||
5336 | DWARF 2's Call Frame Information makes available compiler generated | |
5337 | information that more exactly describes the program's run-time stack. | |
5338 | By using this information, GDB is able to provide more robust stack | |
5339 | backtraces. | |
5340 | ||
5341 | The i386, amd64 (nee, x86-64), Alpha, m68hc11, ia64, and m32r targets | |
5342 | have been updated to use a new backtrace mechanism which includes | |
5343 | DWARF 2 CFI support. | |
5344 | ||
5345 | * Hosted file I/O. | |
5346 | ||
5347 | GDB's remote protocol has been extended to include support for hosted | |
5348 | file I/O (where the remote target uses GDB's file system). See GDB's | |
5349 | remote protocol documentation for details. | |
5350 | ||
5351 | * All targets using the new architecture framework. | |
5352 | ||
5353 | All of GDB's targets have been updated to use the new internal | |
5354 | architecture framework. The way is now open for future GDB releases | |
5355 | to include cross-architecture native debugging support (i386 on amd64, | |
5356 | ppc32 on ppc64). | |
5357 | ||
5358 | * GNU/Linux's Thread Local Storage (TLS) | |
5359 | ||
5360 | GDB now includes support for for the GNU/Linux implementation of | |
5361 | per-thread variables. | |
5362 | ||
5363 | * GNU/Linux's Native POSIX Thread Library (NPTL) | |
5364 | ||
5365 | GDB's thread code has been updated to work with either the new | |
5366 | GNU/Linux NPTL thread library or the older "LinuxThreads" library. | |
5367 | ||
5368 | * Separate debug info. | |
5369 | ||
5370 | GDB, in conjunction with BINUTILS, now supports a mechanism for | |
5371 | automatically loading debug information from a separate file. Instead | |
5372 | of shipping full debug and non-debug versions of system libraries, | |
5373 | system integrators can now instead ship just the stripped libraries | |
5374 | and optional debug files. | |
5375 | ||
5376 | * DWARF 2 Location Expressions | |
5377 | ||
5378 | DWARF 2 Location Expressions allow the compiler to more completely | |
5379 | describe the location of variables (even in optimized code) to the | |
5380 | debugger. | |
5381 | ||
5382 | GDB now includes preliminary support for location expressions (support | |
5383 | for DW_OP_piece is still missing). | |
5384 | ||
5385 | * Java | |
5386 | ||
5387 | A number of long standing bugs that caused GDB to die while starting a | |
5388 | Java application have been fixed. GDB's Java support is now | |
5389 | considered "useable". | |
5390 | ||
5391 | * GNU/Linux support for fork, vfork, and exec. | |
5392 | ||
5393 | The "catch fork", "catch exec", "catch vfork", and "set follow-fork-mode" | |
5394 | commands are now implemented for GNU/Linux. They require a 2.5.x or later | |
5395 | kernel. | |
5396 | ||
5397 | * GDB supports logging output to a file | |
5398 | ||
5399 | There are two new commands, "set logging" and "show logging", which can be | |
5400 | used to capture GDB's output to a file. | |
5401 | ||
5402 | * The meaning of "detach" has changed for gdbserver | |
5403 | ||
5404 | The "detach" command will now resume the application, as documented. To | |
5405 | disconnect from gdbserver and leave it stopped, use the new "disconnect" | |
5406 | command. | |
5407 | ||
5408 | * d10v, m68hc11 `regs' command deprecated | |
5409 | ||
5410 | The `info registers' command has been updated so that it displays the | |
5411 | registers using a format identical to the old `regs' command. | |
5412 | ||
5413 | * Profiling support | |
5414 | ||
5415 | A new command, "maint set profile on/off", has been added. This command can | |
5416 | be used to enable or disable profiling while running GDB, to profile a | |
5417 | session or a set of commands. In addition there is a new configure switch, | |
5418 | "--enable-profiling", which will cause GDB to be compiled with profiling | |
5419 | data, for more informative profiling results. | |
5420 | ||
5421 | * Default MI syntax changed to "mi2". | |
5422 | ||
5423 | The default MI (machine interface) syntax, enabled by the command line | |
5424 | option "-i=mi", has been changed to "mi2". The previous MI syntax, | |
5425 | "mi1", can be enabled by specifying the option "-i=mi1". | |
5426 | ||
5427 | Support for the original "mi0" syntax (included in GDB 5.0) has been | |
5428 | removed. | |
5429 | ||
5430 | Fix for gdb/192: removed extraneous space when displaying frame level. | |
5431 | Fix for gdb/672: update changelist is now output in mi list format. | |
5432 | Fix for gdb/702: a -var-assign that updates the value now shows up | |
5433 | in a subsequent -var-update. | |
5434 | ||
5435 | * New native configurations. | |
5436 | ||
5437 | FreeBSD/amd64 x86_64-*-freebsd* | |
5438 | ||
5439 | * Multi-arched targets. | |
5440 | ||
5441 | HP/PA HPUX11 hppa*-*-hpux* | |
5442 | Renesas M32R/D w/simulator m32r-*-elf* | |
5443 | ||
5444 | * OBSOLETE configurations and files | |
5445 | ||
5446 | Configurations that have been declared obsolete in this release have | |
5447 | been commented out. Unless there is activity to revive these | |
5448 | configurations, the next release of GDB will have their sources | |
5449 | permanently REMOVED. | |
5450 | ||
5451 | Z8000 simulator z8k-zilog-none or z8ksim | |
5452 | Matsushita MN10200 w/simulator mn10200-*-* | |
5453 | H8/500 simulator h8500-hitachi-hms or h8500hms | |
5454 | HP/PA running BSD hppa*-*-bsd* | |
5455 | HP/PA running OSF/1 hppa*-*-osf* | |
5456 | HP/PA Pro target hppa*-*-pro* | |
5457 | PMAX (MIPS) running Mach 3.0 mips*-*-mach3* | |
5458 | Sequent family i[3456]86-sequent-sysv4* | |
5459 | i[3456]86-sequent-sysv* | |
5460 | i[3456]86-sequent-bsd* | |
5461 | Tsqware Sparclet sparclet-*-* | |
5462 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite | |
5463 | ||
5464 | * REMOVED configurations and files | |
5465 | ||
5466 | V850EA ISA | |
5467 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 | |
5468 | IBM AIX PS/2 i[3456]86-*-aix | |
5469 | i386 running Mach 3.0 i[3456]86-*-mach3* | |
5470 | i386 running Mach i[3456]86-*-mach* | |
5471 | i386 running OSF/1 i[3456]86-*osf1mk* | |
5472 | HP/Apollo 68k Family m68*-apollo*-sysv*, | |
5473 | m68*-apollo*-bsd*, | |
5474 | m68*-hp-bsd*, m68*-hp-hpux* | |
5475 | Argonaut Risc Chip (ARC) arc-*-* | |
5476 | Mitsubishi D30V d30v-*-* | |
5477 | Fujitsu FR30 fr30-*-elf* | |
5478 | OS/9000 i[34]86-*-os9k | |
5479 | I960 with MON960 i960-*-coff | |
5480 | ||
5481 | * MIPS $fp behavior changed | |
5482 | ||
5483 | The convenience variable $fp, for the MIPS, now consistently returns | |
5484 | the address of the current frame's base. Previously, depending on the | |
5485 | context, $fp could refer to either $sp or the current frame's base | |
5486 | address. See ``8.10 Registers'' in the manual ``Debugging with GDB: | |
5487 | The GNU Source-Level Debugger''. | |
5488 | ||
5489 | *** Changes in GDB 5.3: | |
5490 | ||
5491 | * GNU/Linux shared library multi-threaded performance improved. | |
5492 | ||
5493 | When debugging a multi-threaded application on GNU/Linux, GDB now uses | |
5494 | `/proc', in preference to `ptrace' for memory reads. This may result | |
5495 | in an improvement in the start-up time of multi-threaded, shared | |
5496 | library applications when run under GDB. One GDB user writes: ``loads | |
5497 | shared libs like mad''. | |
5498 | ||
5499 | * ``gdbserver'' now supports multi-threaded applications on some targets | |
5500 | ||
5501 | Support for debugging multi-threaded applications which use | |
5502 | the GNU/Linux LinuxThreads package has been added for | |
5503 | arm*-*-linux*-gnu*, i[3456]86-*-linux*-gnu*, mips*-*-linux*-gnu*, | |
5504 | powerpc*-*-linux*-gnu*, and sh*-*-linux*-gnu*. | |
5505 | ||
5506 | * GDB now supports C/C++ preprocessor macros. | |
5507 | ||
5508 | GDB now expands preprocessor macro invocations in C/C++ expressions, | |
5509 | and provides various commands for showing macro definitions and how | |
5510 | they expand. | |
5511 | ||
5512 | The new command `macro expand EXPRESSION' expands any macro | |
5513 | invocations in expression, and shows the result. | |
5514 | ||
5515 | The new command `show macro MACRO-NAME' shows the definition of the | |
5516 | macro named MACRO-NAME, and where it was defined. | |
5517 | ||
5518 | Most compilers don't include information about macros in the debugging | |
5519 | information by default. In GCC 3.1, for example, you need to compile | |
5520 | your program with the options `-gdwarf-2 -g3'. If the macro | |
5521 | information is present in the executable, GDB will read it. | |
5522 | ||
5523 | * Multi-arched targets. | |
5524 | ||
5525 | DEC Alpha (partial) alpha*-*-* | |
5526 | DEC VAX (partial) vax-*-* | |
5527 | NEC V850 v850-*-* | |
5528 | National Semiconductor NS32000 (partial) ns32k-*-* | |
5529 | Motorola 68000 (partial) m68k-*-* | |
5530 | Motorola MCORE mcore-*-* | |
5531 | ||
5532 | * New targets. | |
5533 | ||
5534 | Fujitsu FRV architecture added by Red Hat frv*-*-* | |
5535 | ||
5536 | ||
5537 | * New native configurations | |
5538 | ||
5539 | Alpha NetBSD alpha*-*-netbsd* | |
5540 | SH NetBSD sh*-*-netbsdelf* | |
5541 | MIPS NetBSD mips*-*-netbsd* | |
5542 | UltraSPARC NetBSD sparc64-*-netbsd* | |
5543 | ||
5544 | * OBSOLETE configurations and files | |
5545 | ||
5546 | Configurations that have been declared obsolete in this release have | |
5547 | been commented out. Unless there is activity to revive these | |
5548 | configurations, the next release of GDB will have their sources | |
5549 | permanently REMOVED. | |
5550 | ||
5551 | Mitsubishi D30V d30v-*-* | |
5552 | OS/9000 i[34]86-*-os9k | |
5553 | IBM AIX PS/2 i[3456]86-*-aix | |
5554 | Fujitsu FR30 fr30-*-elf* | |
5555 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 | |
5556 | Argonaut Risc Chip (ARC) arc-*-* | |
5557 | i386 running Mach 3.0 i[3456]86-*-mach3* | |
5558 | i386 running Mach i[3456]86-*-mach* | |
5559 | i386 running OSF/1 i[3456]86-*osf1mk* | |
5560 | HP/Apollo 68k Family m68*-apollo*-sysv*, | |
5561 | m68*-apollo*-bsd*, | |
5562 | m68*-hp-bsd*, m68*-hp-hpux* | |
5563 | I960 with MON960 i960-*-coff | |
5564 | ||
5565 | * OBSOLETE languages | |
5566 | ||
5567 | CHILL, a Pascal like language used by telecommunications companies. | |
5568 | ||
5569 | * REMOVED configurations and files | |
5570 | ||
5571 | AMD 29k family via UDI a29k-amd-udi, udi29k | |
5572 | A29K VxWorks a29k-*-vxworks | |
5573 | AMD 29000 embedded, using EBMON a29k-none-none | |
5574 | AMD 29000 embedded with COFF a29k-none-coff | |
5575 | AMD 29000 embedded with a.out a29k-none-aout | |
5576 | ||
5577 | testsuite/gdb.hp/gdb.threads-hp/ directory | |
5578 | ||
5579 | * New command "set max-user-call-depth <nnn>" | |
5580 | ||
5581 | This command allows the user to limit the call depth of user-defined | |
5582 | commands. The default is 1024. | |
5583 | ||
5584 | * Changes in FreeBSD/i386 native debugging. | |
5585 | ||
5586 | Support for the "generate-core-file" has been added. | |
5587 | ||
5588 | * New commands "dump", "append", and "restore". | |
5589 | ||
5590 | These commands allow data to be copied from target memory | |
5591 | to a bfd-format or binary file (dump and append), and back | |
5592 | from a file into memory (restore). | |
5593 | ||
5594 | * Improved "next/step" support on multi-processor Alpha Tru64. | |
5595 | ||
5596 | The previous single-step mechanism could cause unpredictable problems, | |
5597 | including the random appearance of SIGSEGV or SIGTRAP signals. The use | |
5598 | of a software single-step mechanism prevents this. | |
5599 | ||
5600 | *** Changes in GDB 5.2.1: | |
5601 | ||
5602 | * New targets. | |
5603 | ||
5604 | Atmel AVR avr*-*-* | |
5605 | ||
5606 | * Bug fixes | |
5607 | ||
5608 | gdb/182: gdb/323: gdb/237: On alpha, gdb was reporting: | |
5609 | mdebugread.c:2443: gdb-internal-error: sect_index_data not initialized | |
5610 | Fix, by Joel Brobecker imported from mainline. | |
5611 | ||
5612 | gdb/439: gdb/291: On some ELF object files, gdb was reporting: | |
5613 | dwarf2read.c:1072: gdb-internal-error: sect_index_text not initialize | |
5614 | Fix, by Fred Fish, imported from mainline. | |
5615 | ||
5616 | Dwarf2 .debug_frame & .eh_frame handler improved in many ways. | |
5617 | Surprisingly enough, it works now. | |
5618 | By Michal Ludvig, imported from mainline. | |
5619 | ||
5620 | i386 hardware watchpoint support: | |
5621 | avoid misses on second run for some targets. | |
5622 | By Pierre Muller, imported from mainline. | |
5623 | ||
5624 | *** Changes in GDB 5.2: | |
5625 | ||
5626 | * New command "set trust-readonly-sections on[off]". | |
5627 | ||
5628 | This command is a hint that tells gdb that read-only sections | |
5629 | really are read-only (ie. that their contents will not change). | |
5630 | In this mode, gdb will go to the object file rather than the | |
5631 | target to read memory from read-only sections (such as ".text"). | |
5632 | This can be a significant performance improvement on some | |
5633 | (notably embedded) targets. | |
5634 | ||
5635 | * New command "generate-core-file" (or "gcore"). | |
5636 | ||
5637 | This new gdb command allows the user to drop a core file of the child | |
5638 | process state at any time. So far it's been implemented only for | |
5639 | GNU/Linux and Solaris, but should be relatively easily ported to other | |
5640 | hosts. Argument is core file name (defaults to core.<pid>). | |
5641 | ||
5642 | * New command line option | |
5643 | ||
5644 | GDB now accepts --pid or -p followed by a process id. | |
5645 | ||
5646 | * Change in command line behavior -- corefiles vs. process ids. | |
5647 | ||
5648 | There is a subtle behavior in the way in which GDB handles | |
5649 | command line arguments. The first non-flag argument is always | |
5650 | a program to debug, but the second non-flag argument may either | |
5651 | be a corefile or a process id. Previously, GDB would attempt to | |
5652 | open the second argument as a corefile, and if that failed, would | |
5653 | issue a superfluous error message and then attempt to attach it as | |
5654 | a process. Now, if the second argument begins with a non-digit, | |
5655 | it will be treated as a corefile. If it begins with a digit, | |
5656 | GDB will attempt to attach it as a process, and if no such process | |
5657 | is found, will then attempt to open it as a corefile. | |
5658 | ||
5659 | * Changes in ARM configurations. | |
5660 | ||
5661 | Multi-arch support is enabled for all ARM configurations. The ARM/NetBSD | |
5662 | configuration is fully multi-arch. | |
5663 | ||
5664 | * New native configurations | |
5665 | ||
5666 | ARM NetBSD arm*-*-netbsd* | |
5667 | x86 OpenBSD i[3456]86-*-openbsd* | |
5668 | AMD x86-64 running GNU/Linux x86_64-*-linux-* | |
5669 | Sparc64 running FreeBSD sparc64-*-freebsd* | |
5670 | ||
5671 | * New targets | |
5672 | ||
5673 | Sanyo XStormy16 xstormy16-elf | |
5674 | ||
5675 | * OBSOLETE configurations and files | |
5676 | ||
5677 | Configurations that have been declared obsolete in this release have | |
5678 | been commented out. Unless there is activity to revive these | |
5679 | configurations, the next release of GDB will have their sources | |
5680 | permanently REMOVED. | |
5681 | ||
5682 | AMD 29k family via UDI a29k-amd-udi, udi29k | |
5683 | A29K VxWorks a29k-*-vxworks | |
5684 | AMD 29000 embedded, using EBMON a29k-none-none | |
5685 | AMD 29000 embedded with COFF a29k-none-coff | |
5686 | AMD 29000 embedded with a.out a29k-none-aout | |
5687 | ||
5688 | testsuite/gdb.hp/gdb.threads-hp/ directory | |
5689 | ||
5690 | * REMOVED configurations and files | |
5691 | ||
5692 | TI TMS320C80 tic80-*-* | |
5693 | WDC 65816 w65-*-* | |
5694 | PowerPC Solaris powerpcle-*-solaris* | |
5695 | PowerPC Windows NT powerpcle-*-cygwin32 | |
5696 | PowerPC Netware powerpc-*-netware* | |
5697 | Harris/CXUX m88k m88*-harris-cxux* | |
5698 | Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-* | |
5699 | ns32k-utek-sysv* ns32k-utek-* | |
5700 | SunOS 4.0.Xi on i386 i[3456]86-*-sunos* | |
5701 | Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern* | |
5702 | Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news | |
5703 | ISI Optimum V (3.05) under 4.3bsd. m68*-isi-* | |
5704 | Apple Macintosh (MPW) host and target N/A host, powerpc-*-macos* | |
5705 | ||
5706 | * Changes to command line processing | |
5707 | ||
5708 | The new `--args' feature can be used to specify command-line arguments | |
5709 | for the inferior from gdb's command line. | |
5710 | ||
5711 | * Changes to key bindings | |
5712 | ||
5713 | There is a new `operate-and-get-next' function bound to `C-o'. | |
5714 | ||
5715 | *** Changes in GDB 5.1.1 | |
5716 | ||
5717 | Fix compile problem on DJGPP. | |
5718 | ||
5719 | Fix a problem with floating-point registers on the i386 being | |
5720 | corrupted. | |
5721 | ||
5722 | Fix to stop GDB crashing on .debug_str debug info. | |
5723 | ||
5724 | Numerous documentation fixes. | |
5725 | ||
5726 | Numerous testsuite fixes. | |
5727 | ||
5728 | *** Changes in GDB 5.1: | |
5729 | ||
5730 | * New native configurations | |
5731 | ||
5732 | Alpha FreeBSD alpha*-*-freebsd* | |
5733 | x86 FreeBSD 3.x and 4.x i[3456]86*-freebsd[34]* | |
5734 | MIPS GNU/Linux mips*-*-linux* | |
5735 | MIPS SGI Irix 6.x mips*-sgi-irix6* | |
5736 | ia64 AIX ia64-*-aix* | |
5737 | s390 and s390x GNU/Linux {s390,s390x}-*-linux* | |
5738 | ||
5739 | * New targets | |
5740 | ||
5741 | Motorola 68HC11 and 68HC12 m68hc11-elf | |
5742 | CRIS cris-axis | |
5743 | UltraSparc running GNU/Linux sparc64-*-linux* | |
5744 | ||
5745 | * OBSOLETE configurations and files | |
5746 | ||
5747 | x86 FreeBSD before 2.2 i[3456]86*-freebsd{1,2.[01]}*, | |
5748 | Harris/CXUX m88k m88*-harris-cxux* | |
5749 | Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-* | |
5750 | ns32k-utek-sysv* ns32k-utek-* | |
5751 | TI TMS320C80 tic80-*-* | |
5752 | WDC 65816 w65-*-* | |
5753 | Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern* | |
5754 | PowerPC Solaris powerpcle-*-solaris* | |
5755 | PowerPC Windows NT powerpcle-*-cygwin32 | |
5756 | PowerPC Netware powerpc-*-netware* | |
5757 | SunOS 4.0.Xi on i386 i[3456]86-*-sunos* | |
5758 | Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news | |
5759 | ISI Optimum V (3.05) under 4.3bsd. m68*-isi-* | |
5760 | Apple Macintosh (MPW) host N/A | |
5761 | ||
5762 | stuff.c (Program to stuff files into a specially prepared space in kdb) | |
5763 | kdb-start.c (Main loop for the standalone kernel debugger) | |
5764 | ||
5765 | Configurations that have been declared obsolete in this release have | |
5766 | been commented out. Unless there is activity to revive these | |
5767 | configurations, the next release of GDB will have their sources | |
5768 | permanently REMOVED. | |
5769 | ||
5770 | * REMOVED configurations and files | |
5771 | ||
5772 | Altos 3068 m68*-altos-* | |
5773 | Convex c1-*-*, c2-*-* | |
5774 | Pyramid pyramid-*-* | |
5775 | ARM RISCix arm-*-* (as host) | |
5776 | Tahoe tahoe-*-* | |
5777 | ser-ocd.c *-*-* | |
5778 | ||
5779 | * GDB has been converted to ISO C. | |
5780 | ||
5781 | GDB's source code has been converted to ISO C. In particular, the | |
5782 | sources are fully protoized, and rely on standard headers being | |
5783 | present. | |
5784 | ||
5785 | * Other news: | |
5786 | ||
5787 | * "info symbol" works on platforms which use COFF, ECOFF, XCOFF, and NLM. | |
5788 | ||
5789 | * The MI enabled by default. | |
5790 | ||
5791 | The new machine oriented interface (MI) introduced in GDB 5.0 has been | |
5792 | revised and enabled by default. Packages which use GDB as a debugging | |
5793 | engine behind a UI or another front end are encouraged to switch to | |
5794 | using the GDB/MI interface, instead of the old annotations interface | |
5795 | which is now deprecated. | |
5796 | ||
5797 | * Support for debugging Pascal programs. | |
5798 | ||
5799 | GDB now includes support for debugging Pascal programs. The following | |
5800 | main features are supported: | |
5801 | ||
5802 | - Pascal-specific data types such as sets; | |
5803 | ||
5804 | - automatic recognition of Pascal sources based on file-name | |
5805 | extension; | |
5806 | ||
5807 | - Pascal-style display of data types, variables, and functions; | |
5808 | ||
5809 | - a Pascal expression parser. | |
5810 | ||
5811 | However, some important features are not yet supported. | |
5812 | ||
5813 | - Pascal string operations are not supported at all; | |
5814 | ||
5815 | - there are some problems with boolean types; | |
5816 | ||
5817 | - Pascal type hexadecimal constants are not supported | |
5818 | because they conflict with the internal variables format; | |
5819 | ||
5820 | - support for Pascal objects and classes is not full yet; | |
5821 | ||
5822 | - unlike Pascal, GDB is case-sensitive for symbol names. | |
5823 | ||
5824 | * Changes in completion. | |
5825 | ||
5826 | Commands such as `shell', `run' and `set args', which pass arguments | |
5827 | to inferior programs, now complete on file names, similar to what | |
5828 | users expect at the shell prompt. | |
5829 | ||
5830 | Commands which accept locations, such as `disassemble', `print', | |
5831 | `breakpoint', `until', etc. now complete on filenames as well as | |
5832 | program symbols. Thus, if you type "break foob TAB", and the source | |
5833 | files linked into the programs include `foobar.c', that file name will | |
5834 | be one of the candidates for completion. However, file names are not | |
5835 | considered for completion after you typed a colon that delimits a file | |
5836 | name from a name of a function in that file, as in "break foo.c:bar". | |
5837 | ||
5838 | `set demangle-style' completes on available demangling styles. | |
5839 | ||
5840 | * New platform-independent commands: | |
5841 | ||
5842 | It is now possible to define a post-hook for a command as well as a | |
5843 | hook that runs before the command. For more details, see the | |
5844 | documentation of `hookpost' in the GDB manual. | |
5845 | ||
5846 | * Changes in GNU/Linux native debugging. | |
5847 | ||
5848 | Support for debugging multi-threaded programs has been completely | |
5849 | revised for all platforms except m68k and sparc. You can now debug as | |
5850 | many threads as your system allows you to have. | |
5851 | ||
5852 | Attach/detach is supported for multi-threaded programs. | |
5853 | ||
5854 | Support for SSE registers was added for x86. This doesn't work for | |
5855 | multi-threaded programs though. | |
5856 | ||
5857 | * Changes in MIPS configurations. | |
5858 | ||
5859 | Multi-arch support is enabled for all MIPS configurations. | |
5860 | ||
5861 | GDB can now be built as native debugger on SGI Irix 6.x systems for | |
5862 | debugging n32 executables. (Debugging 64-bit executables is not yet | |
5863 | supported.) | |
5864 | ||
5865 | * Unified support for hardware watchpoints in all x86 configurations. | |
5866 | ||
5867 | Most (if not all) native x86 configurations support hardware-assisted | |
5868 | breakpoints and watchpoints in a unified manner. This support | |
5869 | implements debug register sharing between watchpoints, which allows to | |
5870 | put a virtually infinite number of watchpoints on the same address, | |
5871 | and also supports watching regions up to 16 bytes with several debug | |
5872 | registers. | |
5873 | ||
5874 | The new maintenance command `maintenance show-debug-regs' toggles | |
5875 | debugging print-outs in functions that insert, remove, and test | |
5876 | watchpoints and hardware breakpoints. | |
5877 | ||
5878 | * Changes in the DJGPP native configuration. | |
5879 | ||
5880 | New command ``info dos sysinfo'' displays assorted information about | |
5881 | the CPU, OS, memory, and DPMI server. | |
5882 | ||
5883 | New commands ``info dos gdt'', ``info dos ldt'', and ``info dos idt'' | |
5884 | display information about segment descriptors stored in GDT, LDT, and | |
5885 | IDT. | |
5886 | ||
5887 | New commands ``info dos pde'' and ``info dos pte'' display entries | |
5888 | from Page Directory and Page Tables (for now works with CWSDPMI only). | |
5889 | New command ``info dos address-pte'' displays the Page Table entry for | |
5890 | a given linear address. | |
5891 | ||
5892 | GDB can now pass command lines longer than 126 characters to the | |
5893 | program being debugged (requires an update to the libdbg.a library | |
5894 | which is part of the DJGPP development kit). | |
5895 | ||
5896 | DWARF2 debug info is now supported. | |
5897 | ||
5898 | It is now possible to `step' and `next' through calls to `longjmp'. | |
5899 | ||
5900 | * Changes in documentation. | |
5901 | ||
5902 | All GDB documentation was converted to GFDL, the GNU Free | |
5903 | Documentation License. | |
5904 | ||
5905 | Tracepoints-related commands are now fully documented in the GDB | |
5906 | manual. | |
5907 | ||
5908 | TUI, the Text-mode User Interface, is now documented in the manual. | |
5909 | ||
5910 | Tracepoints-related commands are now fully documented in the GDB | |
5911 | manual. | |
5912 | ||
5913 | The "GDB Internals" manual now has an index. It also includes | |
5914 | documentation of `ui_out' functions, GDB coding standards, x86 | |
5915 | hardware watchpoints, and memory region attributes. | |
5916 | ||
5917 | * GDB's version number moved to ``version.in'' | |
5918 | ||
5919 | The Makefile variable VERSION has been replaced by the file | |
5920 | ``version.in''. People creating GDB distributions should update the | |
5921 | contents of this file. | |
5922 | ||
5923 | * gdba.el deleted | |
5924 | ||
5925 | GUD support is now a standard part of the EMACS distribution. | |
5926 | ||
5927 | *** Changes in GDB 5.0: | |
5928 | ||
5929 | * Improved support for debugging FP programs on x86 targets | |
5930 | ||
5931 | Unified and much-improved support for debugging floating-point | |
5932 | programs on all x86 targets. In particular, ``info float'' now | |
5933 | displays the FP registers in the same format on all x86 targets, with | |
5934 | greater level of detail. | |
5935 | ||
5936 | * Improvements and bugfixes in hardware-assisted watchpoints | |
5937 | ||
5938 | It is now possible to watch array elements, struct members, and | |
5939 | bitfields with hardware-assisted watchpoints. Data-read watchpoints | |
5940 | on x86 targets no longer erroneously trigger when the address is | |
5941 | written. | |
5942 | ||
5943 | * Improvements in the native DJGPP version of GDB | |
5944 | ||
5945 | The distribution now includes all the scripts and auxiliary files | |
5946 | necessary to build the native DJGPP version on MS-DOS/MS-Windows | |
5947 | machines ``out of the box''. | |
5948 | ||
5949 | The DJGPP version can now debug programs that use signals. It is | |
5950 | possible to catch signals that happened in the debuggee, deliver | |
5951 | signals to it, interrupt it with Ctrl-C, etc. (Previously, a signal | |
5952 | would kill the program being debugged.) Programs that hook hardware | |
5953 | interrupts (keyboard, timer, etc.) can also be debugged. | |
5954 | ||
5955 | It is now possible to debug DJGPP programs that redirect their | |
5956 | standard handles or switch them to raw (as opposed to cooked) mode, or | |
5957 | even close them. The command ``run < foo > bar'' works as expected, | |
5958 | and ``info terminal'' reports useful information about the debuggee's | |
5959 | terminal, including raw/cooked mode, redirection, etc. | |
5960 | ||
5961 | The DJGPP version now uses termios functions for console I/O, which | |
5962 | enables debugging graphics programs. Interrupting GDB with Ctrl-C | |
5963 | also works. | |
5964 | ||
5965 | DOS-style file names with drive letters are now fully supported by | |
5966 | GDB. | |
5967 | ||
5968 | It is now possible to debug DJGPP programs that switch their working | |
5969 | directory. It is also possible to rerun the debuggee any number of | |
5970 | times without restarting GDB; thus, you can use the same setup, | |
5971 | breakpoints, etc. for many debugging sessions. | |
5972 | ||
5973 | * New native configurations | |
5974 | ||
5975 | ARM GNU/Linux arm*-*-linux* | |
5976 | PowerPC GNU/Linux powerpc-*-linux* | |
5977 | ||
5978 | * New targets | |
5979 | ||
5980 | Motorola MCore mcore-*-* | |
5981 | x86 VxWorks i[3456]86-*-vxworks* | |
5982 | PowerPC VxWorks powerpc-*-vxworks* | |
5983 | TI TMS320C80 tic80-*-* | |
5984 | ||
5985 | * OBSOLETE configurations | |
5986 | ||
5987 | Altos 3068 m68*-altos-* | |
5988 | Convex c1-*-*, c2-*-* | |
5989 | Pyramid pyramid-*-* | |
5990 | ARM RISCix arm-*-* (as host) | |
5991 | Tahoe tahoe-*-* | |
5992 | ||
5993 | Configurations that have been declared obsolete will be commented out, | |
5994 | but the code will be left in place. If there is no activity to revive | |
5995 | these configurations before the next release of GDB, the sources will | |
5996 | be permanently REMOVED. | |
5997 | ||
5998 | * Gould support removed | |
5999 | ||
6000 | Support for the Gould PowerNode and NP1 has been removed. | |
6001 | ||
6002 | * New features for SVR4 | |
6003 | ||
6004 | On SVR4 native platforms (such as Solaris), if you attach to a process | |
6005 | without first loading a symbol file, GDB will now attempt to locate and | |
6006 | load symbols from the running process's executable file. | |
6007 | ||
6008 | * Many C++ enhancements | |
6009 | ||
6010 | C++ support has been greatly improved. Overload resolution now works properly | |
6011 | in almost all cases. RTTI support is on the way. | |
6012 | ||
6013 | * Remote targets can connect to a sub-program | |
6014 | ||
6015 | A popen(3) style serial-device has been added. This device starts a | |
6016 | sub-process (such as a stand-alone simulator) and then communicates | |
6017 | with that. The sub-program to run is specified using the syntax | |
6018 | ``|<program> <args>'' vis: | |
6019 | ||
6020 | (gdb) set remotedebug 1 | |
6021 | (gdb) target extended-remote |mn10300-elf-sim program-args | |
6022 | ||
6023 | * MIPS 64 remote protocol | |
6024 | ||
6025 | A long standing bug in the mips64 remote protocol where by GDB | |
6026 | expected certain 32 bit registers (ex SR) to be transfered as 32 | |
6027 | instead of 64 bits has been fixed. | |
6028 | ||
6029 | The command ``set remote-mips64-transfers-32bit-regs on'' has been | |
6030 | added to provide backward compatibility with older versions of GDB. | |
6031 | ||
6032 | * ``set remotebinarydownload'' replaced by ``set remote X-packet'' | |
6033 | ||
6034 | The command ``set remotebinarydownload'' command has been replaced by | |
6035 | ``set remote X-packet''. Other commands in ``set remote'' family | |
6036 | include ``set remote P-packet''. | |
6037 | ||
6038 | * Breakpoint commands accept ranges. | |
6039 | ||
6040 | The breakpoint commands ``enable'', ``disable'', and ``delete'' now | |
6041 | accept a range of breakpoints, e.g. ``5-7''. The tracepoint command | |
6042 | ``tracepoint passcount'' also accepts a range of tracepoints. | |
6043 | ||
6044 | * ``apropos'' command added. | |
6045 | ||
6046 | The ``apropos'' command searches through command names and | |
6047 | documentation strings, printing out matches, making it much easier to | |
6048 | try to find a command that does what you are looking for. | |
6049 | ||
6050 | * New MI interface | |
6051 | ||
6052 | A new machine oriented interface (MI) has been added to GDB. This | |
6053 | interface is designed for debug environments running GDB as a separate | |
6054 | process. This is part of the long term libGDB project. See the | |
6055 | "GDB/MI" chapter of the GDB manual for further information. It can be | |
6056 | enabled by configuring with: | |
6057 | ||
6058 | .../configure --enable-gdbmi | |
6059 | ||
6060 | *** Changes in GDB-4.18: | |
6061 | ||
6062 | * New native configurations | |
6063 | ||
6064 | HP-UX 10.20 hppa*-*-hpux10.20 | |
6065 | HP-UX 11.x hppa*-*-hpux11.0* | |
6066 | M68K GNU/Linux m68*-*-linux* | |
6067 | ||
6068 | * New targets | |
6069 | ||
6070 | Fujitsu FR30 fr30-*-elf* | |
6071 | Intel StrongARM strongarm-*-* | |
6072 | Mitsubishi D30V d30v-*-* | |
6073 | ||
6074 | * OBSOLETE configurations | |
6075 | ||
6076 | Gould PowerNode, NP1 np1-*-*, pn-*-* | |
6077 | ||
6078 | Configurations that have been declared obsolete will be commented out, | |
6079 | but the code will be left in place. If there is no activity to revive | |
6080 | these configurations before the next release of GDB, the sources will | |
6081 | be permanently REMOVED. | |
6082 | ||
6083 | * ANSI/ISO C | |
6084 | ||
6085 | As a compatibility experiment, GDB's source files buildsym.h and | |
6086 | buildsym.c have been converted to pure standard C, no longer | |
6087 | containing any K&R compatibility code. We believe that all systems in | |
6088 | use today either come with a standard C compiler, or have a GCC port | |
6089 | available. If this is not true, please report the affected | |
6090 | configuration to bug-gdb@gnu.org immediately. See the README file for | |
6091 | information about getting a standard C compiler if you don't have one | |
6092 | already. | |
6093 | ||
6094 | * Readline 2.2 | |
6095 | ||
6096 | GDB now uses readline 2.2. | |
6097 | ||
6098 | * set extension-language | |
6099 | ||
6100 | You can now control the mapping between filename extensions and source | |
6101 | languages by using the `set extension-language' command. For instance, | |
6102 | you can ask GDB to treat .c files as C++ by saying | |
6103 | set extension-language .c c++ | |
6104 | The command `info extensions' lists all of the recognized extensions | |
6105 | and their associated languages. | |
6106 | ||
6107 | * Setting processor type for PowerPC and RS/6000 | |
6108 | ||
6109 | When GDB is configured for a powerpc*-*-* or an rs6000*-*-* target, | |
6110 | you can use the `set processor' command to specify what variant of the | |
6111 | PowerPC family you are debugging. The command | |
6112 | ||
6113 | set processor NAME | |
6114 | ||
6115 | sets the PowerPC/RS6000 variant to NAME. GDB knows about the | |
6116 | following PowerPC and RS6000 variants: | |
6117 | ||
6118 | ppc-uisa PowerPC UISA - a PPC processor as viewed by user-level code | |
6119 | rs6000 IBM RS6000 ("POWER") architecture, user-level view | |
6120 | 403 IBM PowerPC 403 | |
6121 | 403GC IBM PowerPC 403GC | |
6122 | 505 Motorola PowerPC 505 | |
6123 | 860 Motorola PowerPC 860 or 850 | |
6124 | 601 Motorola PowerPC 601 | |
6125 | 602 Motorola PowerPC 602 | |
6126 | 603 Motorola/IBM PowerPC 603 or 603e | |
6127 | 604 Motorola PowerPC 604 or 604e | |
6128 | 750 Motorola/IBM PowerPC 750 or 750 | |
6129 | ||
6130 | At the moment, this command just tells GDB what to name the | |
6131 | special-purpose processor registers. Since almost all the affected | |
6132 | registers are inaccessible to user-level programs, this command is | |
6133 | only useful for remote debugging in its present form. | |
6134 | ||
6135 | * HP-UX support | |
6136 | ||
6137 | Thanks to a major code donation from Hewlett-Packard, GDB now has much | |
6138 | more extensive support for HP-UX. Added features include shared | |
6139 | library support, kernel threads and hardware watchpoints for 11.00, | |
6140 | support for HP's ANSI C and C++ compilers, and a compatibility mode | |
6141 | for xdb and dbx commands. | |
6142 | ||
6143 | * Catchpoints | |
6144 | ||
6145 | HP's donation includes the new concept of catchpoints, which is a | |
6146 | generalization of the old catch command. On HP-UX, it is now possible | |
6147 | to catch exec, fork, and vfork, as well as library loading. | |
6148 | ||
6149 | This means that the existing catch command has changed; its first | |
6150 | argument now specifies the type of catch to be set up. See the | |
6151 | output of "help catch" for a list of catchpoint types. | |
6152 | ||
6153 | * Debugging across forks | |
6154 | ||
6155 | On HP-UX, you can choose which process to debug when a fork() happens | |
6156 | in the inferior. | |
6157 | ||
6158 | * TUI | |
6159 | ||
6160 | HP has donated a curses-based terminal user interface (TUI). To get | |
6161 | it, build with --enable-tui. Although this can be enabled for any | |
6162 | configuration, at present it only works for native HP debugging. | |
6163 | ||
6164 | * GDB remote protocol additions | |
6165 | ||
6166 | A new protocol packet 'X' that writes binary data is now available. | |
6167 | Default behavior is to try 'X', then drop back to 'M' if the stub | |
6168 | fails to respond. The settable variable `remotebinarydownload' | |
6169 | allows explicit control over the use of 'X'. | |
6170 | ||
6171 | For 64-bit targets, the memory packets ('M' and 'm') can now contain a | |
6172 | full 64-bit address. The command | |
6173 | ||
6174 | set remoteaddresssize 32 | |
6175 | ||
6176 | can be used to revert to the old behaviour. For existing remote stubs | |
6177 | the change should not be noticed, as the additional address information | |
6178 | will be discarded. | |
6179 | ||
6180 | In order to assist in debugging stubs, you may use the maintenance | |
6181 | command `packet' to send any text string to the stub. For instance, | |
6182 | ||
6183 | maint packet heythere | |
6184 | ||
6185 | sends the packet "$heythere#<checksum>". Note that it is very easy to | |
6186 | disrupt a debugging session by sending the wrong packet at the wrong | |
6187 | time. | |
6188 | ||
6189 | The compare-sections command allows you to compare section data on the | |
6190 | target to what is in the executable file without uploading or | |
6191 | downloading, by comparing CRC checksums. | |
6192 | ||
6193 | * Tracing can collect general expressions | |
6194 | ||
6195 | You may now collect general expressions at tracepoints. This requires | |
6196 | further additions to the target-side stub; see tracepoint.c and | |
6197 | doc/agentexpr.texi for further details. | |
6198 | ||
6199 | * mask-address variable for Mips | |
6200 | ||
6201 | For Mips targets, you may control the zeroing of the upper 32 bits of | |
6202 | a 64-bit address by entering `set mask-address on'. This is mainly | |
6203 | of interest to users of embedded R4xxx and R5xxx processors. | |
6204 | ||
6205 | * Higher serial baud rates | |
6206 | ||
6207 | GDB's serial code now allows you to specify baud rates 57600, 115200, | |
6208 | 230400, and 460800 baud. (Note that your host system may not be able | |
6209 | to achieve all of these rates.) | |
6210 | ||
6211 | * i960 simulator | |
6212 | ||
6213 | The i960 configuration now includes an initial implementation of a | |
6214 | builtin simulator, contributed by Jim Wilson. | |
6215 | ||
6216 | ||
6217 | *** Changes in GDB-4.17: | |
6218 | ||
6219 | * New native configurations | |
6220 | ||
6221 | Alpha GNU/Linux alpha*-*-linux* | |
6222 | Unixware 2.x i[3456]86-unixware2* | |
6223 | Irix 6.x mips*-sgi-irix6* | |
6224 | PowerPC GNU/Linux powerpc-*-linux* | |
6225 | PowerPC Solaris powerpcle-*-solaris* | |
6226 | Sparc GNU/Linux sparc-*-linux* | |
6227 | Motorola sysV68 R3V7.1 m68k-motorola-sysv | |
6228 | ||
6229 | * New targets | |
6230 | ||
6231 | Argonaut Risc Chip (ARC) arc-*-* | |
6232 | Hitachi H8/300S h8300*-*-* | |
6233 | Matsushita MN10200 w/simulator mn10200-*-* | |
6234 | Matsushita MN10300 w/simulator mn10300-*-* | |
6235 | MIPS NEC VR4100 mips64*vr4100*{,el}-*-elf* | |
6236 | MIPS NEC VR5000 mips64*vr5000*{,el}-*-elf* | |
6237 | MIPS Toshiba TX39 mips64*tx39*{,el}-*-elf* | |
6238 | Mitsubishi D10V w/simulator d10v-*-* | |
6239 | Mitsubishi M32R/D w/simulator m32r-*-elf* | |
6240 | Tsqware Sparclet sparclet-*-* | |
6241 | NEC V850 w/simulator v850-*-* | |
6242 | ||
6243 | * New debugging protocols | |
6244 | ||
6245 | ARM with RDI protocol arm*-*-* | |
6246 | M68K with dBUG monitor m68*-*-{aout,coff,elf} | |
6247 | DDB and LSI variants of PMON protocol mips*-*-* | |
6248 | PowerPC with DINK32 monitor powerpc{,le}-*-eabi | |
6249 | PowerPC with SDS protocol powerpc{,le}-*-eabi | |
6250 | Macraigor OCD (Wiggler) devices powerpc{,le}-*-eabi | |
6251 | ||
6252 | * DWARF 2 | |
6253 | ||
6254 | All configurations can now understand and use the DWARF 2 debugging | |
6255 | format. The choice is automatic, if the symbol file contains DWARF 2 | |
6256 | information. | |
6257 | ||
6258 | * Java frontend | |
6259 | ||
6260 | GDB now includes basic Java language support. This support is | |
6261 | only useful with Java compilers that produce native machine code. | |
6262 | ||
6263 | * solib-absolute-prefix and solib-search-path | |
6264 | ||
6265 | For SunOS and SVR4 shared libraries, you may now set the prefix for | |
6266 | loading absolute shared library symbol files, and the search path for | |
6267 | locating non-absolute shared library symbol files. | |
6268 | ||
6269 | * Live range splitting | |
6270 | ||
6271 | GDB can now effectively debug code for which GCC has performed live | |
6272 | range splitting as part of its optimization. See gdb/doc/LRS for | |
6273 | more details on the expected format of the stabs information. | |
6274 | ||
6275 | * Hurd support | |
6276 | ||
6277 | GDB's support for the GNU Hurd, including thread debugging, has been | |
6278 | updated to work with current versions of the Hurd. | |
6279 | ||
6280 | * ARM Thumb support | |
6281 | ||
6282 | GDB's ARM target configuration now handles the ARM7T (Thumb) 16-bit | |
6283 | instruction set. ARM GDB automatically detects when Thumb | |
6284 | instructions are in use, and adjusts disassembly and backtracing | |
6285 | accordingly. | |
6286 | ||
6287 | * MIPS16 support | |
6288 | ||
6289 | GDB's MIPS target configurations now handle the MIP16 16-bit | |
6290 | instruction set. | |
6291 | ||
6292 | * Overlay support | |
6293 | ||
6294 | GDB now includes support for overlays; if an executable has been | |
6295 | linked such that multiple sections are based at the same address, GDB | |
6296 | will decide which section to use for symbolic info. You can choose to | |
6297 | control the decision manually, using overlay commands, or implement | |
6298 | additional target-side support and use "overlay load-target" to bring | |
6299 | in the overlay mapping. Do "help overlay" for more detail. | |
6300 | ||
6301 | * info symbol | |
6302 | ||
6303 | The command "info symbol <address>" displays information about | |
6304 | the symbol at the specified address. | |
6305 | ||
6306 | * Trace support | |
6307 | ||
6308 | The standard remote protocol now includes an extension that allows | |
6309 | asynchronous collection and display of trace data. This requires | |
6310 | extensive support in the target-side debugging stub. Tracing mode | |
6311 | includes a new interaction mode in GDB and new commands: see the | |
6312 | file tracepoint.c for more details. | |
6313 | ||
6314 | * MIPS simulator | |
6315 | ||
6316 | Configurations for embedded MIPS now include a simulator contributed | |
6317 | by Cygnus Solutions. The simulator supports the instruction sets | |
6318 | of most MIPS variants. | |
6319 | ||
6320 | * Sparc simulator | |
6321 | ||
6322 | Sparc configurations may now include the ERC32 simulator contributed | |
6323 | by the European Space Agency. The simulator is not built into | |
6324 | Sparc targets by default; configure with --enable-sim to include it. | |
6325 | ||
6326 | * set architecture | |
6327 | ||
6328 | For target configurations that may include multiple variants of a | |
6329 | basic architecture (such as MIPS and SH), you may now set the | |
6330 | architecture explicitly. "set arch" sets, "info arch" lists | |
6331 | the possible architectures. | |
6332 | ||
6333 | *** Changes in GDB-4.16: | |
6334 | ||
6335 | * New native configurations | |
6336 | ||
6337 | Windows 95, x86 Windows NT i[345]86-*-cygwin32 | |
6338 | M68K NetBSD m68k-*-netbsd* | |
6339 | PowerPC AIX 4.x powerpc-*-aix* | |
6340 | PowerPC MacOS powerpc-*-macos* | |
6341 | PowerPC Windows NT powerpcle-*-cygwin32 | |
6342 | RS/6000 AIX 4.x rs6000-*-aix4* | |
6343 | ||
6344 | * New targets | |
6345 | ||
6346 | ARM with RDP protocol arm-*-* | |
6347 | I960 with MON960 i960-*-coff | |
6348 | MIPS VxWorks mips*-*-vxworks* | |
6349 | MIPS VR4300 with PMON mips64*vr4300{,el}-*-elf* | |
6350 | PowerPC with PPCBUG monitor powerpc{,le}-*-eabi* | |
6351 | Hitachi SH3 sh-*-* | |
6352 | Matra Sparclet sparclet-*-* | |
6353 | ||
6354 | * PowerPC simulator | |
6355 | ||
6356 | The powerpc-eabi configuration now includes the PSIM simulator, | |
6357 | contributed by Andrew Cagney, with assistance from Mike Meissner. | |
6358 | PSIM is a very elaborate model of the PowerPC, including not only | |
6359 | basic instruction set execution, but also details of execution unit | |
6360 | performance and I/O hardware. See sim/ppc/README for more details. | |
6361 | ||
6362 | * Solaris 2.5 | |
6363 | ||
6364 | GDB now works with Solaris 2.5. | |
6365 | ||
6366 | * Windows 95/NT native | |
6367 | ||
6368 | GDB will now work as a native debugger on Windows 95 and Windows NT. | |
6369 | To build it from source, you must use the "gnu-win32" environment, | |
6370 | which uses a DLL to emulate enough of Unix to run the GNU tools. | |
6371 | Further information, binaries, and sources are available at | |
6372 | ftp.cygnus.com, under pub/gnu-win32. | |
6373 | ||
6374 | * dont-repeat command | |
6375 | ||
6376 | If a user-defined command includes the command `dont-repeat', then the | |
6377 | command will not be repeated if the user just types return. This is | |
6378 | useful if the command is time-consuming to run, so that accidental | |
6379 | extra keystrokes don't run the same command many times. | |
6380 | ||
6381 | * Send break instead of ^C | |
6382 | ||
6383 | The standard remote protocol now includes an option to send a break | |
6384 | rather than a ^C to the target in order to interrupt it. By default, | |
6385 | GDB will send ^C; to send a break, set the variable `remotebreak' to 1. | |
6386 | ||
6387 | * Remote protocol timeout | |
6388 | ||
6389 | The standard remote protocol includes a new variable `remotetimeout' | |
6390 | that allows you to set the number of seconds before GDB gives up trying | |
6391 | to read from the target. The default value is 2. | |
6392 | ||
6393 | * Automatic tracking of dynamic object loading (HPUX and Solaris only) | |
6394 | ||
6395 | By default GDB will automatically keep track of objects as they are | |
6396 | loaded and unloaded by the dynamic linker. By using the command `set | |
6397 | stop-on-solib-events 1' you can arrange for GDB to stop the inferior | |
6398 | when shared library events occur, thus allowing you to set breakpoints | |
6399 | in shared libraries which are explicitly loaded by the inferior. | |
6400 | ||
6401 | Note this feature does not work on hpux8. On hpux9 you must link | |
6402 | /usr/lib/end.o into your program. This feature should work | |
6403 | automatically on hpux10. | |
6404 | ||
6405 | * Irix 5.x hardware watchpoint support | |
6406 | ||
6407 | Irix 5 configurations now support the use of hardware watchpoints. | |
6408 | ||
6409 | * Mips protocol "SYN garbage limit" | |
6410 | ||
6411 | When debugging a Mips target using the `target mips' protocol, you | |
6412 | may set the number of characters that GDB will ignore by setting | |
6413 | the `syn-garbage-limit'. A value of -1 means that GDB will ignore | |
6414 | every character. The default value is 1050. | |
6415 | ||
6416 | * Recording and replaying remote debug sessions | |
6417 | ||
6418 | If you set `remotelogfile' to the name of a file, gdb will write to it | |
6419 | a recording of a remote debug session. This recording may then be | |
6420 | replayed back to gdb using "gdbreplay". See gdbserver/README for | |
6421 | details. This is useful when you have a problem with GDB while doing | |
6422 | remote debugging; you can make a recording of the session and send it | |
6423 | to someone else, who can then recreate the problem. | |
6424 | ||
6425 | * Speedups for remote debugging | |
6426 | ||
6427 | GDB includes speedups for downloading and stepping MIPS systems using | |
6428 | the IDT monitor, fast downloads to the Hitachi SH E7000 emulator, | |
6429 | and more efficient S-record downloading. | |
6430 | ||
6431 | * Memory use reductions and statistics collection | |
6432 | ||
6433 | GDB now uses less memory and reports statistics about memory usage. | |
6434 | Try the `maint print statistics' command, for example. | |
6435 | ||
6436 | *** Changes in GDB-4.15: | |
6437 | ||
6438 | * Psymtabs for XCOFF | |
6439 | ||
6440 | The symbol reader for AIX GDB now uses partial symbol tables. This | |
6441 | can greatly improve startup time, especially for large executables. | |
6442 | ||
6443 | * Remote targets use caching | |
6444 | ||
6445 | Remote targets now use a data cache to speed up communication with the | |
6446 | remote side. The data cache could lead to incorrect results because | |
6447 | it doesn't know about volatile variables, thus making it impossible to | |
6448 | debug targets which use memory mapped I/O devices. `set remotecache | |
6449 | off' turns the the data cache off. | |
6450 | ||
6451 | * Remote targets may have threads | |
6452 | ||
6453 | The standard remote protocol now includes support for multiple threads | |
6454 | in the target system, using new protocol commands 'H' and 'T'. See | |
6455 | gdb/remote.c for details. | |
6456 | ||
6457 | * NetROM support | |
6458 | ||
6459 | If GDB is configured with `--enable-netrom', then it will include | |
6460 | support for the NetROM ROM emulator from XLNT Designs. The NetROM | |
6461 | acts as though it is a bank of ROM on the target board, but you can | |
6462 | write into it over the network. GDB's support consists only of | |
6463 | support for fast loading into the emulated ROM; to debug, you must use | |
6464 | another protocol, such as standard remote protocol. The usual | |
6465 | sequence is something like | |
6466 | ||
6467 | target nrom <netrom-hostname> | |
6468 | load <prog> | |
6469 | target remote <netrom-hostname>:1235 | |
6470 | ||
6471 | * Macintosh host | |
6472 | ||
6473 | GDB now includes support for the Apple Macintosh, as a host only. It | |
6474 | may be run as either an MPW tool or as a standalone application, and | |
6475 | it can debug through the serial port. All the usual GDB commands are | |
6476 | available, but to the target command, you must supply "serial" as the | |
6477 | device type instead of "/dev/ttyXX". See mpw-README in the main | |
6478 | directory for more information on how to build. The MPW configuration | |
6479 | scripts */mpw-config.in support only a few targets, and only the | |
6480 | mips-idt-ecoff target has been tested. | |
6481 | ||
6482 | * Autoconf | |
6483 | ||
6484 | GDB configuration now uses autoconf. This is not user-visible, | |
6485 | but does simplify configuration and building. | |
6486 | ||
6487 | * hpux10 | |
6488 | ||
6489 | GDB now supports hpux10. | |
6490 | ||
6491 | *** Changes in GDB-4.14: | |
6492 | ||
6493 | * New native configurations | |
6494 | ||
6495 | x86 FreeBSD i[345]86-*-freebsd | |
6496 | x86 NetBSD i[345]86-*-netbsd | |
6497 | NS32k NetBSD ns32k-*-netbsd | |
6498 | Sparc NetBSD sparc-*-netbsd | |
6499 | ||
6500 | * New targets | |
6501 | ||
6502 | A29K VxWorks a29k-*-vxworks | |
6503 | HP PA PRO embedded (WinBond W89K & Oki OP50N) hppa*-*-pro* | |
6504 | CPU32 EST-300 emulator m68*-*-est* | |
6505 | PowerPC ELF powerpc-*-elf | |
6506 | WDC 65816 w65-*-* | |
6507 | ||
6508 | * Alpha OSF/1 support for procfs | |
6509 | ||
6510 | GDB now supports procfs under OSF/1-2.x and higher, which makes it | |
6511 | possible to attach to running processes. As the mounting of the /proc | |
6512 | filesystem is optional on the Alpha, GDB automatically determines | |
6513 | the availability of /proc during startup. This can lead to problems | |
6514 | if /proc is unmounted after GDB has been started. | |
6515 | ||
6516 | * Arguments to user-defined commands | |
6517 | ||
6518 | User commands may accept up to 10 arguments separated by whitespace. | |
6519 | Arguments are accessed within the user command via $arg0..$arg9. A | |
6520 | trivial example: | |
6521 | define adder | |
6522 | print $arg0 + $arg1 + $arg2 | |
6523 | ||
6524 | To execute the command use: | |
6525 | adder 1 2 3 | |
6526 | ||
6527 | Defines the command "adder" which prints the sum of its three arguments. | |
6528 | Note the arguments are text substitutions, so they may reference variables, | |
6529 | use complex expressions, or even perform inferior function calls. | |
6530 | ||
6531 | * New `if' and `while' commands | |
6532 | ||
6533 | This makes it possible to write more sophisticated user-defined | |
6534 | commands. Both commands take a single argument, which is the | |
6535 | expression to evaluate, and must be followed by the commands to | |
6536 | execute, one per line, if the expression is nonzero, the list being | |
6537 | terminated by the word `end'. The `if' command list may include an | |
6538 | `else' word, which causes the following commands to be executed only | |
6539 | if the expression is zero. | |
6540 | ||
6541 | * Fortran source language mode | |
6542 | ||
6543 | GDB now includes partial support for Fortran 77. It will recognize | |
6544 | Fortran programs and can evaluate a subset of Fortran expressions, but | |
6545 | variables and functions may not be handled correctly. GDB will work | |
6546 | with G77, but does not yet know much about symbols emitted by other | |
6547 | Fortran compilers. | |
6548 | ||
6549 | * Better HPUX support | |
6550 | ||
6551 | Most debugging facilities now work on dynamic executables for HPPAs | |
6552 | running hpux9 or later. You can attach to running dynamically linked | |
6553 | processes, but by default the dynamic libraries will be read-only, so | |
6554 | for instance you won't be able to put breakpoints in them. To change | |
6555 | that behavior do the following before running the program: | |
6556 | ||
6557 | adb -w a.out | |
6558 | __dld_flags?W 0x5 | |
6559 | control-d | |
6560 | ||
6561 | This will cause the libraries to be mapped private and read-write. | |
6562 | To revert to the normal behavior, do this: | |
6563 | ||
6564 | adb -w a.out | |
6565 | __dld_flags?W 0x4 | |
6566 | control-d | |
6567 | ||
6568 | You cannot set breakpoints or examine data in the library until after | |
6569 | the library is loaded if the function/data symbols do not have | |
6570 | external linkage. | |
6571 | ||
6572 | GDB can now also read debug symbols produced by the HP C compiler on | |
6573 | HPPAs (sorry, no C++, Fortran or 68k support). | |
6574 | ||
6575 | * Target byte order now dynamically selectable | |
6576 | ||
6577 | You can choose which byte order to use with a target system, via the | |
6578 | commands "set endian big" and "set endian little", and you can see the | |
6579 | current setting by using "show endian". You can also give the command | |
6580 | "set endian auto", in which case GDB will use the byte order | |
6581 | associated with the executable. Currently, only embedded MIPS | |
6582 | configurations support dynamic selection of target byte order. | |
6583 | ||
6584 | * New DOS host serial code | |
6585 | ||
6586 | This version uses DPMI interrupts to handle buffered I/O, so you | |
6587 | no longer need to run asynctsr when debugging boards connected to | |
6588 | a PC's serial port. | |
6589 | ||
6590 | *** Changes in GDB-4.13: | |
6591 | ||
6592 | * New "complete" command | |
6593 | ||
6594 | This lists all the possible completions for the rest of the line, if it | |
6595 | were to be given as a command itself. This is intended for use by emacs. | |
6596 | ||
6597 | * Trailing space optional in prompt | |
6598 | ||
6599 | "set prompt" no longer adds a space for you after the prompt you set. This | |
6600 | allows you to set a prompt which ends in a space or one that does not. | |
6601 | ||
6602 | * Breakpoint hit counts | |
6603 | ||
6604 | "info break" now displays a count of the number of times the breakpoint | |
6605 | has been hit. This is especially useful in conjunction with "ignore"; you | |
6606 | can ignore a large number of breakpoint hits, look at the breakpoint info | |
6607 | to see how many times the breakpoint was hit, then run again, ignoring one | |
6608 | less than that number, and this will get you quickly to the last hit of | |
6609 | that breakpoint. | |
6610 | ||
6611 | * Ability to stop printing at NULL character | |
6612 | ||
6613 | "set print null-stop" will cause GDB to stop printing the characters of | |
6614 | an array when the first NULL is encountered. This is useful when large | |
6615 | arrays actually contain only short strings. | |
6616 | ||
6617 | * Shared library breakpoints | |
6618 | ||
6619 | In SunOS 4.x, SVR4, and Alpha OSF/1 configurations, you can now set | |
6620 | breakpoints in shared libraries before the executable is run. | |
6621 | ||
6622 | * Hardware watchpoints | |
6623 | ||
6624 | There is a new hardware breakpoint for the watch command for sparclite | |
6625 | targets. See gdb/sparclite/hw_breakpoint.note. | |
6626 | ||
6627 | Hardware watchpoints are also now supported under GNU/Linux. | |
6628 | ||
6629 | * Annotations | |
6630 | ||
6631 | Annotations have been added. These are for use with graphical interfaces, | |
6632 | and are still experimental. Currently only gdba.el uses these. | |
6633 | ||
6634 | * Improved Irix 5 support | |
6635 | ||
6636 | GDB now works properly with Irix 5.2. | |
6637 | ||
6638 | * Improved HPPA support | |
6639 | ||
6640 | GDB now works properly with the latest GCC and GAS. | |
6641 | ||
6642 | * New native configurations | |
6643 | ||
6644 | Sequent PTX4 i[34]86-sequent-ptx4 | |
6645 | HPPA running OSF/1 hppa*-*-osf* | |
6646 | Atari TT running SVR4 m68*-*-sysv4* | |
6647 | RS/6000 LynxOS rs6000-*-lynxos* | |
6648 | ||
6649 | * New targets | |
6650 | ||
6651 | OS/9000 i[34]86-*-os9k | |
6652 | MIPS R4000 mips64*{,el}-*-{ecoff,elf} | |
6653 | Sparc64 sparc64-*-* | |
6654 | ||
6655 | * Hitachi SH7000 and E7000-PC ICE support | |
6656 | ||
6657 | There is now support for communicating with the Hitachi E7000-PC ICE. | |
6658 | This is available automatically when GDB is configured for the SH. | |
6659 | ||
6660 | * Fixes | |
6661 | ||
6662 | As usual, a variety of small fixes and improvements, both generic | |
6663 | and configuration-specific. See the ChangeLog for more detail. | |
6664 | ||
6665 | *** Changes in GDB-4.12: | |
6666 | ||
6667 | * Irix 5 is now supported | |
6668 | ||
6669 | * HPPA support | |
6670 | ||
6671 | GDB-4.12 on the HPPA has a number of changes which make it unable | |
6672 | to debug the output from the currently released versions of GCC and | |
6673 | GAS (GCC 2.5.8 and GAS-2.2 or PAGAS-1.36). Until the next major release | |
6674 | of GCC and GAS, versions of these tools designed to work with GDB-4.12 | |
6675 | can be retrieved via anonymous ftp from jaguar.cs.utah.edu:/dist. | |
6676 | ||
6677 | ||
6678 | *** Changes in GDB-4.11: | |
6679 | ||
6680 | * User visible changes: | |
6681 | ||
6682 | * Remote Debugging | |
6683 | ||
6684 | The "set remotedebug" option is now consistent between the mips remote | |
6685 | target, remote targets using the gdb-specific protocol, UDI (AMD's | |
6686 | debug protocol for the 29k) and the 88k bug monitor. It is now an | |
6687 | integer specifying a debug level (normally 0 or 1, but 2 means more | |
6688 | debugging info for the mips target). | |
6689 | ||
6690 | * DEC Alpha native support | |
6691 | ||
6692 | GDB now works on the DEC Alpha. GCC 2.4.5 does not produce usable | |
6693 | debug info, but GDB works fairly well with the DEC compiler and should | |
6694 | work with a future GCC release. See the README file for a few | |
6695 | Alpha-specific notes. | |
6696 | ||
6697 | * Preliminary thread implementation | |
6698 | ||
6699 | GDB now has preliminary thread support for both SGI/Irix and LynxOS. | |
6700 | ||
6701 | * LynxOS native and target support for 386 | |
6702 | ||
6703 | This release has been hosted on LynxOS 2.2, and also can be configured | |
6704 | to remotely debug programs running under LynxOS (see gdb/gdbserver/README | |
6705 | for details). | |
6706 | ||
6707 | * Improvements in C++ mangling/demangling. | |
6708 | ||
6709 | This release has much better g++ debugging, specifically in name | |
6710 | mangling/demangling, virtual function calls, print virtual table, | |
6711 | call methods, ...etc. | |
6712 | ||
6713 | *** Changes in GDB-4.10: | |
6714 | ||
6715 | * User visible changes: | |
6716 | ||
6717 | Remote debugging using the GDB-specific (`target remote') protocol now | |
6718 | supports the `load' command. This is only useful if you have some | |
6719 | other way of getting the stub to the target system, and you can put it | |
6720 | somewhere in memory where it won't get clobbered by the download. | |
6721 | ||
6722 | Filename completion now works. | |
6723 | ||
6724 | When run under emacs mode, the "info line" command now causes the | |
6725 | arrow to point to the line specified. Also, "info line" prints | |
6726 | addresses in symbolic form (as well as hex). | |
6727 | ||
6728 | All vxworks based targets now support a user settable option, called | |
6729 | vxworks-timeout. This option represents the number of seconds gdb | |
6730 | should wait for responses to rpc's. You might want to use this if | |
6731 | your vxworks target is, perhaps, a slow software simulator or happens | |
6732 | to be on the far side of a thin network line. | |
6733 | ||
6734 | * DEC alpha support | |
6735 | ||
6736 | This release contains support for using a DEC alpha as a GDB host for | |
6737 | cross debugging. Native alpha debugging is not supported yet. | |
6738 | ||
6739 | ||
6740 | *** Changes in GDB-4.9: | |
6741 | ||
6742 | * Testsuite | |
6743 | ||
6744 | This is the first GDB release which is accompanied by a matching testsuite. | |
6745 | The testsuite requires installation of dejagnu, which should be available | |
6746 | via ftp from most sites that carry GNU software. | |
6747 | ||
6748 | * C++ demangling | |
6749 | ||
6750 | 'Cfront' style demangling has had its name changed to 'ARM' style, to | |
6751 | emphasize that it was written from the specifications in the C++ Annotated | |
6752 | Reference Manual, not necessarily to be compatible with AT&T cfront. Despite | |
6753 | disclaimers, it still generated too much confusion with users attempting to | |
6754 | use gdb with AT&T cfront. | |
6755 | ||
6756 | * Simulators | |
6757 | ||
6758 | GDB now uses a standard remote interface to a simulator library. | |
6759 | So far, the library contains simulators for the Zilog Z8001/2, the | |
6760 | Hitachi H8/300, H8/500 and Super-H. | |
6761 | ||
6762 | * New targets supported | |
6763 | ||
6764 | H8/300 simulator h8300-hitachi-hms or h8300hms | |
6765 | H8/500 simulator h8500-hitachi-hms or h8500hms | |
6766 | SH simulator sh-hitachi-hms or sh | |
6767 | Z8000 simulator z8k-zilog-none or z8ksim | |
6768 | IDT MIPS board over serial line mips-idt-ecoff | |
6769 | ||
6770 | Cross-debugging to GO32 targets is supported. It requires a custom | |
6771 | version of the i386-stub.c module which is integrated with the | |
6772 | GO32 memory extender. | |
6773 | ||
6774 | * New remote protocols | |
6775 | ||
6776 | MIPS remote debugging protocol. | |
6777 | ||
6778 | * New source languages supported | |
6779 | ||
6780 | This version includes preliminary support for Chill, a Pascal like language | |
6781 | used by telecommunications companies. Chill support is also being integrated | |
6782 | into the GNU compiler, but we don't know when it will be publically available. | |
6783 | ||
6784 | ||
6785 | *** Changes in GDB-4.8: | |
6786 | ||
6787 | * HP Precision Architecture supported | |
6788 | ||
6789 | GDB now supports HP PA-RISC machines running HPUX. A preliminary | |
6790 | version of this support was available as a set of patches from the | |
6791 | University of Utah. GDB does not support debugging of programs | |
6792 | compiled with the HP compiler, because HP will not document their file | |
6793 | format. Instead, you must use GCC (version 2.3.2 or later) and PA-GAS | |
6794 | (as available from jaguar.cs.utah.edu:/dist/pa-gas.u4.tar.Z). | |
6795 | ||
6796 | Many problems in the preliminary version have been fixed. | |
6797 | ||
6798 | * Faster and better demangling | |
6799 | ||
6800 | We have improved template demangling and fixed numerous bugs in the GNU style | |
6801 | demangler. It can now handle type modifiers such as `static' or `const'. Wide | |
6802 | character types (wchar_t) are now supported. Demangling of each symbol is now | |
6803 | only done once, and is cached when the symbol table for a file is read in. | |
6804 | This results in a small increase in memory usage for C programs, a moderate | |
6805 | increase in memory usage for C++ programs, and a fantastic speedup in | |
6806 | symbol lookups. | |
6807 | ||
6808 | `Cfront' style demangling still doesn't work with AT&T cfront. It was written | |
6809 | from the specifications in the Annotated Reference Manual, which AT&T's | |
6810 | compiler does not actually implement. | |
6811 | ||
6812 | * G++ multiple inheritance compiler problem | |
6813 | ||
6814 | In the 2.3.2 release of gcc/g++, how the compiler resolves multiple | |
6815 | inheritance lattices was reworked to properly discover ambiguities. We | |
6816 | recently found an example which causes this new algorithm to fail in a | |
6817 | very subtle way, producing bad debug information for those classes. | |
6818 | The file 'gcc.patch' (in this directory) can be applied to gcc to | |
6819 | circumvent the problem. A future GCC release will contain a complete | |
6820 | fix. | |
6821 | ||
6822 | The previous G++ debug info problem (mentioned below for the gdb-4.7 | |
6823 | release) is fixed in gcc version 2.3.2. | |
6824 | ||
6825 | * Improved configure script | |
6826 | ||
6827 | The `configure' script will now attempt to guess your system type if | |
6828 | you don't supply a host system type. The old scheme of supplying a | |
6829 | host system triplet is preferable over using this. All the magic is | |
6830 | done in the new `config.guess' script. Examine it for details. | |
6831 | ||
6832 | We have also brought our configure script much more in line with the FSF's | |
6833 | version. It now supports the --with-xxx options. In particular, | |
6834 | `--with-minimal-bfd' can be used to make the GDB binary image smaller. | |
6835 | The resulting GDB will not be able to read arbitrary object file formats -- | |
6836 | only the format ``expected'' to be used on the configured target system. | |
6837 | We hope to make this the default in a future release. | |
6838 | ||
6839 | * Documentation improvements | |
6840 | ||
6841 | There's new internal documentation on how to modify GDB, and how to | |
6842 | produce clean changes to the code. We implore people to read it | |
6843 | before submitting changes. | |
6844 | ||
6845 | The GDB manual uses new, sexy Texinfo conditionals, rather than arcane | |
6846 | M4 macros. The new texinfo.tex is provided in this release. Pre-built | |
6847 | `info' files are also provided. To build `info' files from scratch, | |
6848 | you will need the latest `makeinfo' release, which will be available in | |
6849 | a future texinfo-X.Y release. | |
6850 | ||
6851 | *NOTE* The new texinfo.tex can cause old versions of TeX to hang. | |
6852 | We're not sure exactly which versions have this problem, but it has | |
6853 | been seen in 3.0. We highly recommend upgrading to TeX version 3.141 | |
6854 | or better. If that isn't possible, there is a patch in | |
6855 | `texinfo/tex3patch' that will modify `texinfo/texinfo.tex' to work | |
6856 | around this problem. | |
6857 | ||
6858 | * New features | |
6859 | ||
6860 | GDB now supports array constants that can be used in expressions typed in by | |
6861 | the user. The syntax is `{element, element, ...}'. Ie: you can now type | |
6862 | `print {1, 2, 3}', and it will build up an array in memory malloc'd in | |
6863 | the target program. | |
6864 | ||
6865 | The new directory `gdb/sparclite' contains a program that demonstrates | |
6866 | how the sparc-stub.c remote stub runs on a Fujitsu SPARClite processor. | |
6867 | ||
6868 | * New native hosts supported | |
6869 | ||
6870 | HP/PA-RISC under HPUX using GNU tools hppa1.1-hp-hpux | |
6871 | 386 CPUs running SCO Unix 3.2v4 i386-unknown-sco3.2v4 | |
6872 | ||
6873 | * New targets supported | |
6874 | ||
6875 | AMD 29k family via UDI a29k-amd-udi or udi29k | |
6876 | ||
6877 | * New file formats supported | |
6878 | ||
6879 | BFD now supports reading HP/PA-RISC executables (SOM file format?), | |
6880 | HPUX core files, and SCO 3.2v2 core files. | |
6881 | ||
6882 | * Major bug fixes | |
6883 | ||
6884 | Attaching to processes now works again; thanks for the many bug reports. | |
6885 | ||
6886 | We have also stomped on a bunch of core dumps caused by | |
6887 | printf_filtered("%s") problems. | |
6888 | ||
6889 | We eliminated a copyright problem on the rpc and ptrace header files | |
6890 | for VxWorks, which was discovered at the last minute during the 4.7 | |
6891 | release. You should now be able to build a VxWorks GDB. | |
6892 | ||
6893 | You can now interrupt gdb while an attached process is running. This | |
6894 | will cause the attached process to stop, and give control back to GDB. | |
6895 | ||
6896 | We fixed problems caused by using too many file descriptors | |
6897 | for reading symbols from object files and libraries. This was | |
6898 | especially a problem for programs that used many (~100) shared | |
6899 | libraries. | |
6900 | ||
6901 | The `step' command now only enters a subroutine if there is line number | |
6902 | information for the subroutine. Otherwise it acts like the `next' | |
6903 | command. Previously, `step' would enter subroutines if there was | |
6904 | any debugging information about the routine. This avoids problems | |
6905 | when using `cc -g1' on MIPS machines. | |
6906 | ||
6907 | * Internal improvements | |
6908 | ||
6909 | GDB's internal interfaces have been improved to make it easier to support | |
6910 | debugging of multiple languages in the future. | |
6911 | ||
6912 | GDB now uses a common structure for symbol information internally. | |
6913 | Minimal symbols (derived from linkage symbols in object files), partial | |
6914 | symbols (from a quick scan of debug information), and full symbols | |
6915 | contain a common subset of information, making it easier to write | |
6916 | shared code that handles any of them. | |
6917 | ||
6918 | * New command line options | |
6919 | ||
6920 | We now accept --silent as an alias for --quiet. | |
6921 | ||
6922 | * Mmalloc licensing | |
6923 | ||
6924 | The memory-mapped-malloc library is now licensed under the GNU Library | |
6925 | General Public License. | |
6926 | ||
6927 | *** Changes in GDB-4.7: | |
6928 | ||
6929 | * Host/native/target split | |
6930 | ||
6931 | GDB has had some major internal surgery to untangle the support for | |
6932 | hosts and remote targets. Now, when you configure GDB for a remote | |
6933 | target, it will no longer load in all of the support for debugging | |
6934 | local programs on the host. When fully completed and tested, this will | |
6935 | ensure that arbitrary host/target combinations are possible. | |
6936 | ||
6937 | The primary conceptual shift is to separate the non-portable code in | |
6938 | GDB into three categories. Host specific code is required any time GDB | |
6939 | is compiled on that host, regardless of the target. Target specific | |
6940 | code relates to the peculiarities of the target, but can be compiled on | |
6941 | any host. Native specific code is everything else: it can only be | |
6942 | built when the host and target are the same system. Child process | |
6943 | handling and core file support are two common `native' examples. | |
6944 | ||
6945 | GDB's use of /proc for controlling Unix child processes is now cleaner. | |
6946 | It has been split out into a single module under the `target_ops' vector, | |
6947 | plus two native-dependent functions for each system that uses /proc. | |
6948 | ||
6949 | * New hosts supported | |
6950 | ||
6951 | HP/Apollo 68k (under the BSD domain) m68k-apollo-bsd or apollo68bsd | |
6952 | 386 CPUs running various BSD ports i386-unknown-bsd or 386bsd | |
6953 | 386 CPUs running SCO Unix i386-unknown-scosysv322 or i386sco | |
6954 | ||
6955 | * New targets supported | |
6956 | ||
6957 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite | |
6958 | 68030 and CPU32 m68030-*-*, m68332-*-* | |
6959 | ||
6960 | * New native hosts supported | |
6961 | ||
6962 | 386 CPUs running various BSD ports i386-unknown-bsd or 386bsd | |
6963 | (386bsd is not well tested yet) | |
6964 | 386 CPUs running SCO Unix i386-unknown-scosysv322 or sco | |
6965 | ||
6966 | * New file formats supported | |
6967 | ||
6968 | BFD now supports COFF files for the Zilog Z8000 microprocessor. It | |
6969 | supports reading of `a.out.adobe' object files, which are an a.out | |
6970 | format extended with minimal information about multiple sections. | |
6971 | ||
6972 | * New commands | |
6973 | ||
6974 | `show copying' is the same as the old `info copying'. | |
6975 | `show warranty' is the same as `info warrantee'. | |
6976 | These were renamed for consistency. The old commands continue to work. | |
6977 | ||
6978 | `info handle' is a new alias for `info signals'. | |
6979 | ||
6980 | You can now define pre-command hooks, which attach arbitrary command | |
6981 | scripts to any command. The commands in the hook will be executed | |
6982 | prior to the user's command. You can also create a hook which will be | |
6983 | executed whenever the program stops. See gdb.texinfo. | |
6984 | ||
6985 | * C++ improvements | |
6986 | ||
6987 | We now deal with Cfront style name mangling, and can even extract type | |
6988 | info from mangled symbols. GDB can automatically figure out which | |
6989 | symbol mangling style your C++ compiler uses. | |
6990 | ||
6991 | Calling of methods and virtual functions has been improved as well. | |
6992 | ||
6993 | * Major bug fixes | |
6994 | ||
6995 | The crash that occured when debugging Sun Ansi-C compiled binaries is | |
6996 | fixed. This was due to mishandling of the extra N_SO stabs output | |
6997 | by the compiler. | |
6998 | ||
6999 | We also finally got Ultrix 4.2 running in house, and fixed core file | |
7000 | support, with help from a dozen people on the net. | |
7001 | ||
7002 | John M. Farrell discovered that the reason that single-stepping was so | |
7003 | slow on all of the Mips based platforms (primarily SGI and DEC) was | |
7004 | that we were trying to demangle and lookup a symbol used for internal | |
7005 | purposes on every instruction that was being stepped through. Changing | |
7006 | the name of that symbol so that it couldn't be mistaken for a C++ | |
7007 | mangled symbol sped things up a great deal. | |
7008 | ||
7009 | Rich Pixley sped up symbol lookups in general by getting much smarter | |
7010 | about when C++ symbol mangling is necessary. This should make symbol | |
7011 | completion (TAB on the command line) much faster. It's not as fast as | |
7012 | we'd like, but it's significantly faster than gdb-4.6. | |
7013 | ||
7014 | * AMD 29k support | |
7015 | ||
7016 | A new user controllable variable 'call_scratch_address' can | |
7017 | specify the location of a scratch area to be used when GDB | |
7018 | calls a function in the target. This is necessary because the | |
7019 | usual method of putting the scratch area on the stack does not work | |
7020 | in systems that have separate instruction and data spaces. | |
7021 | ||
7022 | We integrated changes to support the 29k UDI (Universal Debugger | |
7023 | Interface), but discovered at the last minute that we didn't have all | |
7024 | of the appropriate copyright paperwork. We are working with AMD to | |
7025 | resolve this, and hope to have it available soon. | |
7026 | ||
7027 | * Remote interfaces | |
7028 | ||
7029 | We have sped up the remote serial line protocol, especially for targets | |
7030 | with lots of registers. It now supports a new `expedited status' ('T') | |
7031 | message which can be used in place of the existing 'S' status message. | |
7032 | This allows the remote stub to send only the registers that GDB | |
7033 | needs to make a quick decision about single-stepping or conditional | |
7034 | breakpoints, eliminating the need to fetch the entire register set for | |
7035 | each instruction being stepped through. | |
7036 | ||
7037 | The GDB remote serial protocol now implements a write-through cache for | |
7038 | registers, only re-reading the registers if the target has run. | |
7039 | ||
7040 | There is also a new remote serial stub for SPARC processors. You can | |
7041 | find it in gdb-4.7/gdb/sparc-stub.c. This was written to support the | |
7042 | Fujitsu SPARClite processor, but will run on any stand-alone SPARC | |
7043 | processor with a serial port. | |
7044 | ||
7045 | * Configuration | |
7046 | ||
7047 | Configure.in files have become much easier to read and modify. A new | |
7048 | `table driven' format makes it more obvious what configurations are | |
7049 | supported, and what files each one uses. | |
7050 | ||
7051 | * Library changes | |
7052 | ||
7053 | There is a new opcodes library which will eventually contain all of the | |
7054 | disassembly routines and opcode tables. At present, it only contains | |
7055 | Sparc and Z8000 routines. This will allow the assembler, debugger, and | |
7056 | disassembler (binutils/objdump) to share these routines. | |
7057 | ||
7058 | The libiberty library is now copylefted under the GNU Library General | |
7059 | Public License. This allows more liberal use, and was done so libg++ | |
7060 | can use it. This makes no difference to GDB, since the Library License | |
7061 | grants all the rights from the General Public License. | |
7062 | ||
7063 | * Documentation | |
7064 | ||
7065 | The file gdb-4.7/gdb/doc/stabs.texinfo is a (relatively) complete | |
7066 | reference to the stabs symbol info used by the debugger. It is (as far | |
7067 | as we know) the only published document on this fascinating topic. We | |
7068 | encourage you to read it, compare it to the stabs information on your | |
7069 | system, and send improvements on the document in general (to | |
7070 | bug-gdb@prep.ai.mit.edu). | |
7071 | ||
7072 | And, of course, many bugs have been fixed. | |
7073 | ||
7074 | ||
7075 | *** Changes in GDB-4.6: | |
7076 | ||
7077 | * Better support for C++ function names | |
7078 | ||
7079 | GDB now accepts as input the "demangled form" of C++ overloaded function | |
7080 | names and member function names, and can do command completion on such names | |
7081 | (using TAB, TAB-TAB, and ESC-?). The names have to be quoted with a pair of | |
7082 | single quotes. Examples are 'func (int, long)' and 'obj::operator==(obj&)'. | |
7083 | Make use of command completion, it is your friend. | |
7084 | ||
7085 | GDB also now accepts a variety of C++ mangled symbol formats. They are | |
7086 | the GNU g++ style, the Cfront (ARM) style, and the Lucid (lcc) style. | |
7087 | You can tell GDB which format to use by doing a 'set demangle-style {gnu, | |
7088 | lucid, cfront, auto}'. 'gnu' is the default. Do a 'set demangle-style foo' | |
7089 | for the list of formats. | |
7090 | ||
7091 | * G++ symbol mangling problem | |
7092 | ||
7093 | Recent versions of gcc have a bug in how they emit debugging information for | |
7094 | C++ methods (when using dbx-style stabs). The file 'gcc.patch' (in this | |
7095 | directory) can be applied to gcc to fix the problem. Alternatively, if you | |
7096 | can't fix gcc, you can #define GCC_MANGLE_BUG when compling gdb/symtab.c. The | |
7097 | usual symptom is difficulty with setting breakpoints on methods. GDB complains | |
7098 | about the method being non-existent. (We believe that version 2.2.2 of GCC has | |
7099 | this problem.) | |
7100 | ||
7101 | * New 'maintenance' command | |
7102 | ||
7103 | All of the commands related to hacking GDB internals have been moved out of | |
7104 | the main command set, and now live behind the 'maintenance' command. This | |
7105 | can also be abbreviated as 'mt'. The following changes were made: | |
7106 | ||
7107 | dump-me -> maintenance dump-me | |
7108 | info all-breakpoints -> maintenance info breakpoints | |
7109 | printmsyms -> maintenance print msyms | |
7110 | printobjfiles -> maintenance print objfiles | |
7111 | printpsyms -> maintenance print psymbols | |
7112 | printsyms -> maintenance print symbols | |
7113 | ||
7114 | The following commands are new: | |
7115 | ||
7116 | maintenance demangle Call internal GDB demangler routine to | |
7117 | demangle a C++ link name and prints the result. | |
7118 | maintenance print type Print a type chain for a given symbol | |
7119 | ||
7120 | * Change to .gdbinit file processing | |
7121 | ||
7122 | We now read the $HOME/.gdbinit file before processing the argv arguments | |
7123 | (e.g. reading symbol files or core files). This allows global parameters to | |
7124 | be set, which will apply during the symbol reading. The ./.gdbinit is still | |
7125 | read after argv processing. | |
7126 | ||
7127 | * New hosts supported | |
7128 | ||
7129 | Solaris-2.0 !!! sparc-sun-solaris2 or sun4sol2 | |
7130 | ||
7131 | GNU/Linux support i386-unknown-linux or linux | |
7132 | ||
7133 | We are also including code to support the HP/PA running BSD and HPUX. This | |
7134 | is almost guaranteed not to work, as we didn't have time to test or build it | |
7135 | for this release. We are including it so that the more adventurous (or | |
7136 | masochistic) of you can play with it. We also had major problems with the | |
7137 | fact that the compiler that we got from HP doesn't support the -g option. | |
7138 | It costs extra. | |
7139 | ||
7140 | * New targets supported | |
7141 | ||
7142 | Hitachi H8/300 h8300-hitachi-hms or h8300hms | |
7143 | ||
7144 | * More smarts about finding #include files | |
7145 | ||
7146 | GDB now remembers the compilation directory for all include files, and for | |
7147 | all files from which C is generated (like yacc and lex sources). This | |
7148 | greatly improves GDB's ability to find yacc/lex sources, and include files, | |
7149 | especially if you are debugging your program from a directory different from | |
7150 | the one that contains your sources. | |
7151 | ||
7152 | We also fixed a bug which caused difficulty with listing and setting | |
7153 | breakpoints in include files which contain C code. (In the past, you had to | |
7154 | try twice in order to list an include file that you hadn't looked at before.) | |
7155 | ||
7156 | * Interesting infernals change | |
7157 | ||
7158 | GDB now deals with arbitrary numbers of sections, where the symbols for each | |
7159 | section must be relocated relative to that section's landing place in the | |
7160 | target's address space. This work was needed to support ELF with embedded | |
7161 | stabs used by Solaris-2.0. | |
7162 | ||
7163 | * Bug fixes (of course!) | |
7164 | ||
7165 | There have been loads of fixes for the following things: | |
7166 | mips, rs6000, 29k/udi, m68k, g++, type handling, elf/dwarf, m88k, | |
7167 | i960, stabs, DOS(GO32), procfs, etc... | |
7168 | ||
7169 | See the ChangeLog for details. | |
7170 | ||
7171 | *** Changes in GDB-4.5: | |
7172 | ||
7173 | * New machines supported (host and target) | |
7174 | ||
7175 | IBM RS6000 running AIX rs6000-ibm-aix or rs6000 | |
7176 | ||
7177 | SGI Irix-4.x mips-sgi-irix4 or iris4 | |
7178 | ||
7179 | * New malloc package | |
7180 | ||
7181 | GDB now uses a new memory manager called mmalloc, based on gmalloc. | |
7182 | Mmalloc is capable of handling mutiple heaps of memory. It is also | |
7183 | capable of saving a heap to a file, and then mapping it back in later. | |
7184 | This can be used to greatly speedup the startup of GDB by using a | |
7185 | pre-parsed symbol table which lives in a mmalloc managed heap. For | |
7186 | more details, please read mmalloc/mmalloc.texi. | |
7187 | ||
7188 | * info proc | |
7189 | ||
7190 | The 'info proc' command (SVR4 only) has been enhanced quite a bit. See | |
7191 | 'help info proc' for details. | |
7192 | ||
7193 | * MIPS ecoff symbol table format | |
7194 | ||
7195 | The code that reads MIPS symbol table format is now supported on all hosts. | |
7196 | Thanks to MIPS for releasing the sym.h and symconst.h files to make this | |
7197 | possible. | |
7198 | ||
7199 | * File name changes for MS-DOS | |
7200 | ||
7201 | Many files in the config directories have been renamed to make it easier to | |
7202 | support GDB on MS-DOSe systems (which have very restrictive file name | |
7203 | conventions :-( ). MS-DOSe host support (under DJ Delorie's GO32 | |
7204 | environment) is close to working but has some remaining problems. Note | |
7205 | that debugging of DOS programs is not supported, due to limitations | |
7206 | in the ``operating system'', but it can be used to host cross-debugging. | |
7207 | ||
7208 | * Cross byte order fixes | |
7209 | ||
7210 | Many fixes have been made to support cross debugging of Sparc and MIPS | |
7211 | targets from hosts whose byte order differs. | |
7212 | ||
7213 | * New -mapped and -readnow options | |
7214 | ||
7215 | If memory-mapped files are available on your system through the 'mmap' | |
7216 | system call, you can use the -mapped option on the `file' or | |
7217 | `symbol-file' commands to cause GDB to write the symbols from your | |
7218 | program into a reusable file. If the program you are debugging is | |
7219 | called `/path/fred', the mapped symbol file will be `./fred.syms'. | |
7220 | Future GDB debugging sessions will notice the presence of this file, | |
7221 | and will quickly map in symbol information from it, rather than reading | |
7222 | the symbol table from the executable program. Using the '-mapped' | |
7223 | option in a GDB `file' or `symbol-file' command has the same effect as | |
7224 | starting GDB with the '-mapped' command-line option. | |
7225 | ||
7226 | You can cause GDB to read the entire symbol table immediately by using | |
7227 | the '-readnow' option with any of the commands that load symbol table | |
7228 | information (or on the GDB command line). This makes the command | |
7229 | slower, but makes future operations faster. | |
7230 | ||
7231 | The -mapped and -readnow options are typically combined in order to | |
7232 | build a `fred.syms' file that contains complete symbol information. | |
7233 | A simple GDB invocation to do nothing but build a `.syms' file for future | |
7234 | use is: | |
7235 | ||
7236 | gdb -batch -nx -mapped -readnow programname | |
7237 | ||
7238 | The `.syms' file is specific to the host machine on which GDB is run. | |
7239 | It holds an exact image of GDB's internal symbol table. It cannot be | |
7240 | shared across multiple host platforms. | |
7241 | ||
7242 | * longjmp() handling | |
7243 | ||
7244 | GDB is now capable of stepping and nexting over longjmp(), _longjmp(), and | |
7245 | siglongjmp() without losing control. This feature has not yet been ported to | |
7246 | all systems. It currently works on many 386 platforms, all MIPS-based | |
7247 | platforms (SGI, DECstation, etc), and Sun3/4. | |
7248 | ||
7249 | * Solaris 2.0 | |
7250 | ||
7251 | Preliminary work has been put in to support the new Solaris OS from Sun. At | |
7252 | this time, it can control and debug processes, but it is not capable of | |
7253 | reading symbols. | |
7254 | ||
7255 | * Bug fixes | |
7256 | ||
7257 | As always, many many bug fixes. The major areas were with g++, and mipsread. | |
7258 | People using the MIPS-based platforms should experience fewer mysterious | |
7259 | crashes and trashed symbol tables. | |
7260 | ||
7261 | *** Changes in GDB-4.4: | |
7262 | ||
7263 | * New machines supported (host and target) | |
7264 | ||
7265 | SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco | |
7266 | (except core files) | |
7267 | BSD Reno on Vax vax-dec-bsd | |
7268 | Ultrix on Vax vax-dec-ultrix | |
7269 | ||
7270 | * New machines supported (target) | |
7271 | ||
7272 | AMD 29000 embedded, using EBMON a29k-none-none | |
7273 | ||
7274 | * C++ support | |
7275 | ||
7276 | GDB continues to improve its handling of C++. `References' work better. | |
7277 | The demangler has also been improved, and now deals with symbols mangled as | |
7278 | per the Annotated C++ Reference Guide. | |
7279 | ||
7280 | GDB also now handles `stabs' symbol information embedded in MIPS | |
7281 | `ecoff' symbol tables. Since the ecoff format was not easily | |
7282 | extensible to handle new languages such as C++, this appeared to be a | |
7283 | good way to put C++ debugging info into MIPS binaries. This option | |
7284 | will be supported in the GNU C compiler, version 2, when it is | |
7285 | released. | |
7286 | ||
7287 | * New features for SVR4 | |
7288 | ||
7289 | GDB now handles SVR4 shared libraries, in the same fashion as SunOS | |
7290 | shared libraries. Debugging dynamically linked programs should present | |
7291 | only minor differences from debugging statically linked programs. | |
7292 | ||
7293 | The `info proc' command will print out information about any process | |
7294 | on an SVR4 system (including the one you are debugging). At the moment, | |
7295 | it prints the address mappings of the process. | |
7296 | ||
7297 | If you bring up GDB on another SVR4 system, please send mail to | |
7298 | bug-gdb@prep.ai.mit.edu to let us know what changes were reqired (if any). | |
7299 | ||
7300 | * Better dynamic linking support in SunOS | |
7301 | ||
7302 | Reading symbols from shared libraries which contain debugging symbols | |
7303 | now works properly. However, there remain issues such as automatic | |
7304 | skipping of `transfer vector' code during function calls, which | |
7305 | make it harder to debug code in a shared library, than to debug the | |
7306 | same code linked statically. | |
7307 | ||
7308 | * New Getopt | |
7309 | ||
7310 | GDB is now using the latest `getopt' routines from the FSF. This | |
7311 | version accepts the -- prefix for options with long names. GDB will | |
7312 | continue to accept the old forms (-option and +option) as well. | |
7313 | Various single letter abbreviations for options have been explicity | |
7314 | added to the option table so that they won't get overshadowed in the | |
7315 | future by other options that begin with the same letter. | |
7316 | ||
7317 | * Bugs fixed | |
7318 | ||
7319 | The `cleanup_undefined_types' bug that many of you noticed has been squashed. | |
7320 | Many assorted bugs have been handled. Many more remain to be handled. | |
7321 | See the various ChangeLog files (primarily in gdb and bfd) for details. | |
7322 | ||
7323 | ||
7324 | *** Changes in GDB-4.3: | |
7325 | ||
7326 | * New machines supported (host and target) | |
7327 | ||
7328 | Amiga 3000 running Amix m68k-cbm-svr4 or amix | |
7329 | NCR 3000 386 running SVR4 i386-ncr-svr4 or ncr3000 | |
7330 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 | |
7331 | ||
7332 | * Almost SCO Unix support | |
7333 | ||
7334 | We had hoped to support: | |
7335 | SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco | |
7336 | (except for core file support), but we discovered very late in the release | |
7337 | that it has problems with process groups that render gdb unusable. Sorry | |
7338 | about that. I encourage people to fix it and post the fixes. | |
7339 | ||
7340 | * Preliminary ELF and DWARF support | |
7341 | ||
7342 | GDB can read ELF object files on System V Release 4, and can handle | |
7343 | debugging records for C, in DWARF format, in ELF files. This support | |
7344 | is preliminary. If you bring up GDB on another SVR4 system, please | |
7345 | send mail to bug-gdb@prep.ai.mit.edu to let us know what changes were | |
7346 | reqired (if any). | |
7347 | ||
7348 | * New Readline | |
7349 | ||
7350 | GDB now uses the latest `readline' library. One user-visible change | |
7351 | is that two tabs will list possible command completions, which previously | |
7352 | required typing M-? (meta-question mark, or ESC ?). | |
7353 | ||
7354 | * Bugs fixed | |
7355 | ||
7356 | The `stepi' bug that many of you noticed has been squashed. | |
7357 | Many bugs in C++ have been handled. Many more remain to be handled. | |
7358 | See the various ChangeLog files (primarily in gdb and bfd) for details. | |
7359 | ||
7360 | * State of the MIPS world (in case you wondered): | |
7361 | ||
7362 | GDB can understand the symbol tables emitted by the compilers | |
7363 | supplied by most vendors of MIPS-based machines, including DEC. These | |
7364 | symbol tables are in a format that essentially nobody else uses. | |
7365 | ||
7366 | Some versions of gcc come with an assembler post-processor called | |
7367 | mips-tfile. This program is required if you want to do source-level | |
7368 | debugging of gcc-compiled programs. I believe FSF does not ship | |
7369 | mips-tfile with gcc version 1, but it will eventually come with gcc | |
7370 | version 2. | |
7371 | ||
7372 | Debugging of g++ output remains a problem. g++ version 1.xx does not | |
7373 | really support it at all. (If you're lucky, you should be able to get | |
7374 | line numbers and stack traces to work, but no parameters or local | |
7375 | variables.) With some work it should be possible to improve the | |
7376 | situation somewhat. | |
7377 | ||
7378 | When gcc version 2 is released, you will have somewhat better luck. | |
7379 | However, even then you will get confusing results for inheritance and | |
7380 | methods. | |
7381 | ||
7382 | We will eventually provide full debugging of g++ output on | |
7383 | DECstations. This will probably involve some kind of stabs-in-ecoff | |
7384 | encapulation, but the details have not been worked out yet. | |
7385 | ||
7386 | ||
7387 | *** Changes in GDB-4.2: | |
7388 | ||
7389 | * Improved configuration | |
7390 | ||
7391 | Only one copy of `configure' exists now, and it is not self-modifying. | |
7392 | Porting BFD is simpler. | |
7393 | ||
7394 | * Stepping improved | |
7395 | ||
7396 | The `step' and `next' commands now only stop at the first instruction | |
7397 | of a source line. This prevents the multiple stops that used to occur | |
7398 | in switch statements, for-loops, etc. `Step' continues to stop if a | |
7399 | function that has debugging information is called within the line. | |
7400 | ||
7401 | * Bug fixing | |
7402 | ||
7403 | Lots of small bugs fixed. More remain. | |
7404 | ||
7405 | * New host supported (not target) | |
7406 | ||
7407 | Intel 386 PC clone running Mach i386-none-mach | |
7408 | ||
7409 | ||
7410 | *** Changes in GDB-4.1: | |
7411 | ||
7412 | * Multiple source language support | |
7413 | ||
7414 | GDB now has internal scaffolding to handle several source languages. | |
7415 | It determines the type of each source file from its filename extension, | |
7416 | and will switch expression parsing and number formatting to match the | |
7417 | language of the function in the currently selected stack frame. | |
7418 | You can also specifically set the language to be used, with | |
7419 | `set language c' or `set language modula-2'. | |
7420 | ||
7421 | * GDB and Modula-2 | |
7422 | ||
7423 | GDB now has preliminary support for the GNU Modula-2 compiler, | |
7424 | currently under development at the State University of New York at | |
7425 | Buffalo. Development of both GDB and the GNU Modula-2 compiler will | |
7426 | continue through the fall of 1991 and into 1992. | |
7427 | ||
7428 | Other Modula-2 compilers are currently not supported, and attempting to | |
7429 | debug programs compiled with them will likely result in an error as the | |
7430 | symbol table is read. Feel free to work on it, though! | |
7431 | ||
7432 | There are hooks in GDB for strict type checking and range checking, | |
7433 | in the `Modula-2 philosophy', but they do not currently work. | |
7434 | ||
7435 | * set write on/off | |
7436 | ||
7437 | GDB can now write to executable and core files (e.g. patch | |
7438 | a variable's value). You must turn this switch on, specify | |
7439 | the file ("exec foo" or "core foo"), *then* modify it, e.g. | |
7440 | by assigning a new value to a variable. Modifications take | |
7441 | effect immediately. | |
7442 | ||
7443 | * Automatic SunOS shared library reading | |
7444 | ||
7445 | When you run your program, GDB automatically determines where its | |
7446 | shared libraries (if any) have been loaded, and reads their symbols. | |
7447 | The `share' command is no longer needed. This also works when | |
7448 | examining core files. | |
7449 | ||
7450 | * set listsize | |
7451 | ||
7452 | You can specify the number of lines that the `list' command shows. | |
7453 | The default is 10. | |
7454 | ||
7455 | * New machines supported (host and target) | |
7456 | ||
7457 | SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris | |
7458 | Sony NEWS (68K) running NEWSOS 3.x: m68k-sony-sysv or news | |
7459 | Ultracomputer (29K) running Sym1: a29k-nyu-sym1 or ultra3 | |
7460 | ||
7461 | * New hosts supported (not targets) | |
7462 | ||
7463 | IBM RT/PC: romp-ibm-aix or rtpc | |
7464 | ||
7465 | * New targets supported (not hosts) | |
7466 | ||
7467 | AMD 29000 embedded with COFF a29k-none-coff | |
7468 | AMD 29000 embedded with a.out a29k-none-aout | |
7469 | Ultracomputer remote kernel debug a29k-nyu-kern | |
7470 | ||
7471 | * New remote interfaces | |
7472 | ||
7473 | AMD 29000 Adapt | |
7474 | AMD 29000 Minimon | |
7475 | ||
7476 | ||
7477 | *** Changes in GDB-4.0: | |
7478 | ||
7479 | * New Facilities | |
7480 | ||
7481 | Wide output is wrapped at good places to make the output more readable. | |
7482 | ||
7483 | Gdb now supports cross-debugging from a host machine of one type to a | |
7484 | target machine of another type. Communication with the target system | |
7485 | is over serial lines. The ``target'' command handles connecting to the | |
7486 | remote system; the ``load'' command will download a program into the | |
7487 | remote system. Serial stubs for the m68k and i386 are provided. Gdb | |
7488 | also supports debugging of realtime processes running under VxWorks, | |
7489 | using SunRPC Remote Procedure Calls over TCP/IP to talk to a debugger | |
7490 | stub on the target system. | |
7491 | ||
7492 | New CPUs supported include the AMD 29000 and Intel 960. | |
7493 | ||
7494 | GDB now reads object files and symbol tables via a ``binary file'' | |
7495 | library, which allows a single copy of GDB to debug programs of multiple | |
7496 | object file types such as a.out and coff. | |
7497 | ||
7498 | There is now a GDB reference card in "doc/refcard.tex". (Make targets | |
7499 | refcard.dvi and refcard.ps are available to format it). | |
7500 | ||
7501 | ||
7502 | * Control-Variable user interface simplified | |
7503 | ||
7504 | All variables that control the operation of the debugger can be set | |
7505 | by the ``set'' command, and displayed by the ``show'' command. | |
7506 | ||
7507 | For example, ``set prompt new-gdb=>'' will change your prompt to new-gdb=>. | |
7508 | ``Show prompt'' produces the response: | |
7509 | Gdb's prompt is new-gdb=>. | |
7510 | ||
7511 | What follows are the NEW set commands. The command ``help set'' will | |
7512 | print a complete list of old and new set commands. ``help set FOO'' | |
7513 | will give a longer description of the variable FOO. ``show'' will show | |
7514 | all of the variable descriptions and their current settings. | |
7515 | ||
7516 | confirm on/off: Enables warning questions for operations that are | |
7517 | hard to recover from, e.g. rerunning the program while | |
7518 | it is already running. Default is ON. | |
7519 | ||
7520 | editing on/off: Enables EMACS style command line editing | |
7521 | of input. Previous lines can be recalled with | |
7522 | control-P, the current line can be edited with control-B, | |
7523 | you can search for commands with control-R, etc. | |
7524 | Default is ON. | |
7525 | ||
7526 | history filename NAME: NAME is where the gdb command history | |
7527 | will be stored. The default is .gdb_history, | |
7528 | or the value of the environment variable | |
7529 | GDBHISTFILE. | |
7530 | ||
7531 | history size N: The size, in commands, of the command history. The | |
7532 | default is 256, or the value of the environment variable | |
7533 | HISTSIZE. | |
7534 | ||
7535 | history save on/off: If this value is set to ON, the history file will | |
7536 | be saved after exiting gdb. If set to OFF, the | |
7537 | file will not be saved. The default is OFF. | |
7538 | ||
7539 | history expansion on/off: If this value is set to ON, then csh-like | |
7540 | history expansion will be performed on | |
7541 | command line input. The default is OFF. | |
7542 | ||
7543 | radix N: Sets the default radix for input and output. It can be set | |
7544 | to 8, 10, or 16. Note that the argument to "radix" is interpreted | |
7545 | in the current radix, so "set radix 10" is always a no-op. | |
7546 | ||
7547 | height N: This integer value is the number of lines on a page. Default | |
7548 | is 24, the current `stty rows'' setting, or the ``li#'' | |
7549 | setting from the termcap entry matching the environment | |
7550 | variable TERM. | |
7551 | ||
7552 | width N: This integer value is the number of characters on a line. | |
7553 | Default is 80, the current `stty cols'' setting, or the ``co#'' | |
7554 | setting from the termcap entry matching the environment | |
7555 | variable TERM. | |
7556 | ||
7557 | Note: ``set screensize'' is obsolete. Use ``set height'' and | |
7558 | ``set width'' instead. | |
7559 | ||
7560 | print address on/off: Print memory addresses in various command displays, | |
7561 | such as stack traces and structure values. Gdb looks | |
7562 | more ``symbolic'' if you turn this off; it looks more | |
7563 | ``machine level'' with it on. Default is ON. | |
7564 | ||
7565 | print array on/off: Prettyprint arrays. New convenient format! Default | |
7566 | is OFF. | |
7567 | ||
7568 | print demangle on/off: Print C++ symbols in "source" form if on, | |
7569 | "raw" form if off. | |
7570 | ||
7571 | print asm-demangle on/off: Same, for assembler level printouts | |
7572 | like instructions. | |
7573 | ||
7574 | print vtbl on/off: Prettyprint C++ virtual function tables. Default is OFF. | |
7575 | ||
7576 | ||
7577 | * Support for Epoch Environment. | |
7578 | ||
7579 | The epoch environment is a version of Emacs v18 with windowing. One | |
7580 | new command, ``inspect'', is identical to ``print'', except that if you | |
7581 | are running in the epoch environment, the value is printed in its own | |
7582 | window. | |
7583 | ||
7584 | ||
7585 | * Support for Shared Libraries | |
7586 | ||
7587 | GDB can now debug programs and core files that use SunOS shared libraries. | |
7588 | Symbols from a shared library cannot be referenced | |
7589 | before the shared library has been linked with the program (this | |
7590 | happens after you type ``run'' and before the function main() is entered). | |
7591 | At any time after this linking (including when examining core files | |
7592 | from dynamically linked programs), gdb reads the symbols from each | |
7593 | shared library when you type the ``sharedlibrary'' command. | |
7594 | It can be abbreviated ``share''. | |
7595 | ||
7596 | sharedlibrary REGEXP: Load shared object library symbols for files | |
7597 | matching a unix regular expression. No argument | |
7598 | indicates to load symbols for all shared libraries. | |
7599 | ||
7600 | info sharedlibrary: Status of loaded shared libraries. | |
7601 | ||
7602 | ||
7603 | * Watchpoints | |
7604 | ||
7605 | A watchpoint stops execution of a program whenever the value of an | |
7606 | expression changes. Checking for this slows down execution | |
7607 | tremendously whenever you are in the scope of the expression, but is | |
7608 | quite useful for catching tough ``bit-spreader'' or pointer misuse | |
7609 | problems. Some machines such as the 386 have hardware for doing this | |
7610 | more quickly, and future versions of gdb will use this hardware. | |
7611 | ||
7612 | watch EXP: Set a watchpoint (breakpoint) for an expression. | |
7613 | ||
7614 | info watchpoints: Information about your watchpoints. | |
7615 | ||
7616 | delete N: Deletes watchpoint number N (same as breakpoints). | |
7617 | disable N: Temporarily turns off watchpoint number N (same as breakpoints). | |
7618 | enable N: Re-enables watchpoint number N (same as breakpoints). | |
7619 | ||
7620 | ||
7621 | * C++ multiple inheritance | |
7622 | ||
7623 | When used with a GCC version 2 compiler, GDB supports multiple inheritance | |
7624 | for C++ programs. | |
7625 | ||
7626 | * C++ exception handling | |
7627 | ||
7628 | Gdb now supports limited C++ exception handling. Besides the existing | |
7629 | ability to breakpoint on an exception handler, gdb can breakpoint on | |
7630 | the raising of an exception (before the stack is peeled back to the | |
7631 | handler's context). | |
7632 | ||
7633 | catch FOO: If there is a FOO exception handler in the dynamic scope, | |
7634 | set a breakpoint to catch exceptions which may be raised there. | |
7635 | Multiple exceptions (``catch foo bar baz'') may be caught. | |
7636 | ||
7637 | info catch: Lists all exceptions which may be caught in the | |
7638 | current stack frame. | |
7639 | ||
7640 | ||
7641 | * Minor command changes | |
7642 | ||
7643 | The command ``call func (arg, arg, ...)'' now acts like the print | |
7644 | command, except it does not print or save a value if the function's result | |
7645 | is void. This is similar to dbx usage. | |
7646 | ||
7647 | The ``up'' and ``down'' commands now always print the frame they end up | |
7648 | at; ``up-silently'' and `down-silently'' can be used in scripts to change | |
7649 | frames without printing. | |
7650 | ||
7651 | * New directory command | |
7652 | ||
7653 | 'dir' now adds directories to the FRONT of the source search path. | |
7654 | The path starts off empty. Source files that contain debug information | |
7655 | about the directory in which they were compiled can be found even | |
7656 | with an empty path; Sun CC and GCC include this information. If GDB can't | |
7657 | find your source file in the current directory, type "dir .". | |
7658 | ||
7659 | * Configuring GDB for compilation | |
7660 | ||
7661 | For normal use, type ``./configure host''. See README or gdb.texinfo | |
7662 | for more details. | |
7663 | ||
7664 | GDB now handles cross debugging. If you are remotely debugging between | |
7665 | two different machines, type ``./configure host -target=targ''. | |
7666 | Host is the machine where GDB will run; targ is the machine | |
7667 | where the program that you are debugging will run. |