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Commit | Line | Data |
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f377b406 | 1 | /* TUI display locator. |
f33c6cbf | 2 | |
42a4f53d | 3 | Copyright (C) 1998-2019 Free Software Foundation, Inc. |
f33c6cbf | 4 | |
f377b406 SC |
5 | Contributed by Hewlett-Packard Company. |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
f377b406 SC |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "symtab.h" | |
24 | #include "breakpoint.h" | |
25 | #include "frame.h" | |
75fd9bc1 | 26 | #include "command.h" |
50265402 SC |
27 | #include "inferior.h" |
28 | #include "target.h" | |
7563e053 | 29 | #include "top.h" |
50f182aa | 30 | #include "gdb-demangle.h" |
56d397a3 | 31 | #include "source.h" |
d7b2e967 AC |
32 | #include "tui/tui.h" |
33 | #include "tui/tui-data.h" | |
34 | #include "tui/tui-stack.h" | |
35 | #include "tui/tui-wingeneral.h" | |
36 | #include "tui/tui-source.h" | |
37 | #include "tui/tui-winsource.h" | |
38 | #include "tui/tui-file.h" | |
c906108c | 39 | |
6a83354a | 40 | #include "gdb_curses.h" |
c906108c | 41 | |
f2dda477 TT |
42 | static struct tui_locator_window _locator; |
43 | ||
5564c769 SC |
44 | /* Get a printable name for the function at the address. |
45 | The symbol name is demangled if demangling is turned on. | |
46 | Returns a pointer to a static area holding the result. */ | |
5b6fe301 | 47 | static char *tui_get_function_from_frame (struct frame_info *fi); |
c906108c | 48 | |
56d397a3 JK |
49 | /* Set the full_name portion of the locator. */ |
50 | static void tui_set_locator_fullname (const char *fullname); | |
2e17b763 SC |
51 | |
52 | /* Update the locator, with the provided arguments. */ | |
b5fca6d7 PP |
53 | static int tui_set_locator_info (struct gdbarch *gdbarch, |
54 | const char *fullname, | |
55 | const char *procname, | |
56 | int lineno, CORE_ADDR addr); | |
2e17b763 | 57 | |
0b39b52e | 58 | static void tui_update_command (const char *, int); |
7d6dd1e9 | 59 | \f |
c906108c | 60 | |
f2dda477 TT |
61 | /* Accessor for the locator win info. Answers a pointer to the static |
62 | locator win info struct. */ | |
63 | struct tui_locator_window * | |
64 | tui_locator_win_info_ptr (void) | |
65 | { | |
66 | return &_locator; | |
67 | } | |
68 | ||
69 | void | |
70 | tui_initialize_static_data () | |
71 | { | |
72 | tui_gen_win_info *win = tui_locator_win_info_ptr (); | |
73 | win->width = | |
74 | win->height = | |
75 | win->origin.x = | |
76 | win->origin.y = | |
77 | win->viewport_height = 0; | |
78 | win->handle = NULL; | |
79 | win->is_visible = false; | |
80 | win->title = 0; | |
81 | } | |
82 | ||
83 | ||
1cc6d956 MS |
84 | /* Create the status line to display as much information as we can on |
85 | this single line: target name, process number, current function, | |
86 | current line, current PC, SingleKey mode. */ | |
3add462f TT |
87 | static char * |
88 | tui_make_status_line (struct tui_locator_window *loc) | |
50265402 | 89 | { |
5b6fe301 | 90 | char *string; |
a42a37b7 | 91 | char line_buf[50], *pname; |
5b6fe301 | 92 | char *buf; |
a42a37b7 | 93 | int status_size; |
50265402 | 94 | int i, proc_width; |
5b6fe301 | 95 | const char *pid_name; |
50265402 SC |
96 | int target_width; |
97 | int pid_width; | |
98 | int line_width; | |
50265402 | 99 | |
a068643d | 100 | std::string pid_name_holder; |
d7e15655 | 101 | if (inferior_ptid == null_ptid) |
50265402 SC |
102 | pid_name = "No process"; |
103 | else | |
a068643d TT |
104 | { |
105 | pid_name_holder = target_pid_to_str (inferior_ptid); | |
106 | pid_name = pid_name_holder.c_str (); | |
107 | } | |
50265402 SC |
108 | |
109 | target_width = strlen (target_shortname); | |
110 | if (target_width > MAX_TARGET_WIDTH) | |
111 | target_width = MAX_TARGET_WIDTH; | |
112 | ||
113 | pid_width = strlen (pid_name); | |
114 | if (pid_width > MAX_PID_WIDTH) | |
115 | pid_width = MAX_PID_WIDTH; | |
a42a37b7 | 116 | |
dd1abb8c | 117 | status_size = tui_term_width (); |
50265402 | 118 | string = (char *) xmalloc (status_size + 1); |
a42a37b7 | 119 | buf = (char*) alloca (status_size + 1); |
50265402 SC |
120 | |
121 | /* Translate line number and obtain its size. */ | |
6d012f14 | 122 | if (loc->line_no > 0) |
8c042590 | 123 | xsnprintf (line_buf, sizeof (line_buf), "%d", loc->line_no); |
50265402 SC |
124 | else |
125 | strcpy (line_buf, "??"); | |
126 | line_width = strlen (line_buf); | |
127 | if (line_width < MIN_LINE_WIDTH) | |
128 | line_width = MIN_LINE_WIDTH; | |
129 | ||
130 | /* Translate PC address. */ | |
d7e74731 PA |
131 | string_file pc_out; |
132 | ||
2d5f09f0 | 133 | fputs_filtered (loc->gdbarch? paddress (loc->gdbarch, loc->addr) : "??", |
d7e74731 PA |
134 | &pc_out); |
135 | ||
136 | const char *pc_buf = pc_out.c_str (); | |
137 | int pc_width = pc_out.size (); | |
138 | ||
50265402 SC |
139 | /* First determine the amount of proc name width we have available. |
140 | The +1 are for a space separator between fields. | |
141 | The -1 are to take into account the \0 counted by sizeof. */ | |
142 | proc_width = (status_size | |
143 | - (target_width + 1) | |
144 | - (pid_width + 1) | |
145 | - (sizeof (PROC_PREFIX) - 1 + 1) | |
146 | - (sizeof (LINE_PREFIX) - 1 + line_width + 1) | |
147 | - (sizeof (PC_PREFIX) - 1 + pc_width + 1) | |
6d012f14 | 148 | - (tui_current_key_mode == TUI_SINGLE_KEY_MODE |
50265402 SC |
149 | ? (sizeof (SINGLE_KEY) - 1 + 1) |
150 | : 0)); | |
151 | ||
152 | /* If there is no room to print the function name, try by removing | |
153 | some fields. */ | |
154 | if (proc_width < MIN_PROC_WIDTH) | |
155 | { | |
156 | proc_width += target_width + 1; | |
157 | target_width = 0; | |
158 | if (proc_width < MIN_PROC_WIDTH) | |
159 | { | |
160 | proc_width += pid_width + 1; | |
161 | pid_width = 0; | |
162 | if (proc_width <= MIN_PROC_WIDTH) | |
163 | { | |
164 | proc_width += pc_width + sizeof (PC_PREFIX) - 1 + 1; | |
165 | pc_width = 0; | |
166 | if (proc_width < 0) | |
167 | { | |
168 | proc_width += line_width + sizeof (LINE_PREFIX) - 1 + 1; | |
169 | line_width = 0; | |
170 | if (proc_width < 0) | |
171 | proc_width = 0; | |
172 | } | |
173 | } | |
174 | } | |
175 | } | |
176 | ||
1cc6d956 | 177 | /* Now convert elements to string form. */ |
6d012f14 | 178 | pname = loc->proc_name; |
50265402 | 179 | |
1cc6d956 MS |
180 | /* Now create the locator line from the string version of the |
181 | elements. We could use sprintf() here but that wouldn't ensure | |
182 | that we don't overrun the size of the allocated buffer. | |
183 | strcat_to_buf() will. */ | |
50265402 SC |
184 | *string = (char) 0; |
185 | ||
186 | if (target_width > 0) | |
187 | { | |
188 | sprintf (buf, "%*.*s ", | |
189 | -target_width, target_width, target_shortname); | |
190 | strcat_to_buf (string, status_size, buf); | |
191 | } | |
192 | if (pid_width > 0) | |
193 | { | |
194 | sprintf (buf, "%*.*s ", | |
195 | -pid_width, pid_width, pid_name); | |
196 | strcat_to_buf (string, status_size, buf); | |
197 | } | |
198 | ||
199 | /* Show whether we are in SingleKey mode. */ | |
6d012f14 | 200 | if (tui_current_key_mode == TUI_SINGLE_KEY_MODE) |
50265402 SC |
201 | { |
202 | strcat_to_buf (string, status_size, SINGLE_KEY); | |
203 | strcat_to_buf (string, status_size, " "); | |
204 | } | |
205 | ||
1cc6d956 | 206 | /* Procedure/class name. */ |
50265402 SC |
207 | if (proc_width > 0) |
208 | { | |
209 | if (strlen (pname) > proc_width) | |
210 | sprintf (buf, "%s%*.*s* ", PROC_PREFIX, | |
211 | 1 - proc_width, proc_width - 1, pname); | |
212 | else | |
213 | sprintf (buf, "%s%*.*s ", PROC_PREFIX, | |
214 | -proc_width, proc_width, pname); | |
215 | strcat_to_buf (string, status_size, buf); | |
216 | } | |
217 | ||
218 | if (line_width > 0) | |
219 | { | |
220 | sprintf (buf, "%s%*.*s ", LINE_PREFIX, | |
221 | -line_width, line_width, line_buf); | |
222 | strcat_to_buf (string, status_size, buf); | |
223 | } | |
224 | if (pc_width > 0) | |
225 | { | |
226 | strcat_to_buf (string, status_size, PC_PREFIX); | |
227 | strcat_to_buf (string, status_size, pc_buf); | |
228 | } | |
229 | ||
230 | ||
231 | for (i = strlen (string); i < status_size; i++) | |
232 | string[i] = ' '; | |
233 | string[status_size] = (char) 0; | |
234 | ||
50265402 SC |
235 | return string; |
236 | } | |
237 | ||
1cc6d956 MS |
238 | /* Get a printable name for the function at the address. The symbol |
239 | name is demangled if demangling is turned on. Returns a pointer to | |
240 | a static area holding the result. */ | |
5564c769 SC |
241 | static char* |
242 | tui_get_function_from_frame (struct frame_info *fi) | |
243 | { | |
244 | static char name[256]; | |
d7e74731 | 245 | string_file stream; |
5564c769 | 246 | |
22e722e1 | 247 | print_address_symbolic (get_frame_arch (fi), get_frame_pc (fi), |
d7e74731 | 248 | &stream, demangle, ""); |
5564c769 | 249 | |
1cc6d956 MS |
250 | /* Use simple heuristics to isolate the function name. The symbol |
251 | can be demangled and we can have function parameters. Remove | |
252 | them because the status line is too short to display them. */ | |
d7e74731 PA |
253 | const char *d = stream.c_str (); |
254 | if (*d == '<') | |
255 | d++; | |
256 | strncpy (name, d, sizeof (name) - 1); | |
4e2af517 | 257 | name[sizeof (name) - 1] = 0; |
d7e74731 PA |
258 | |
259 | char *p = strchr (name, '('); | |
5564c769 SC |
260 | if (!p) |
261 | p = strchr (name, '>'); | |
262 | if (p) | |
263 | *p = 0; | |
264 | p = strchr (name, '+'); | |
265 | if (p) | |
266 | *p = 0; | |
5564c769 SC |
267 | return name; |
268 | } | |
c906108c | 269 | |
c906108c | 270 | void |
47d3492a | 271 | tui_show_locator_content (void) |
c906108c SS |
272 | { |
273 | char *string; | |
3add462f | 274 | struct tui_locator_window *locator; |
c906108c | 275 | |
dd1abb8c | 276 | locator = tui_locator_win_info_ptr (); |
c906108c | 277 | |
cafb3438 | 278 | if (locator != NULL && locator->handle != NULL) |
c906108c | 279 | { |
3add462f | 280 | string = tui_make_status_line (locator); |
50265402 | 281 | wmove (locator->handle, 0, 0); |
cae3f17b JB |
282 | /* We ignore the return value from wstandout and wstandend, casting |
283 | them to void in order to avoid a compiler warning. The warning | |
284 | itself was introduced by a patch to ncurses 5.7 dated 2009-08-29, | |
285 | changing these macro to expand to code that causes the compiler | |
286 | to generate an unused-value warning. */ | |
ae3bccd4 | 287 | (void) wstandout (locator->handle); |
50265402 SC |
288 | waddstr (locator->handle, string); |
289 | wclrtoeol (locator->handle); | |
ae3bccd4 | 290 | (void) wstandend (locator->handle); |
5b81daba | 291 | locator->refresh_window (); |
50265402 SC |
292 | wmove (locator->handle, 0, 0); |
293 | xfree (string); | |
c906108c | 294 | } |
50265402 | 295 | } |
c906108c | 296 | |
c906108c | 297 | |
2e17b763 SC |
298 | /* Set the filename portion of the locator. */ |
299 | static void | |
56d397a3 | 300 | tui_set_locator_fullname (const char *fullname) |
2e17b763 | 301 | { |
3add462f | 302 | struct tui_locator_window *locator = tui_locator_win_info_ptr (); |
2e17b763 | 303 | |
3add462f TT |
304 | locator->full_name[0] = 0; |
305 | strcat_to_buf (locator->full_name, MAX_LOCATOR_ELEMENT_LEN, fullname); | |
2e17b763 | 306 | } |
c906108c | 307 | |
b5fca6d7 PP |
308 | /* Update the locator, with the provided arguments. |
309 | ||
310 | Returns 1 if any of the locator's fields were actually changed, | |
311 | and 0 otherwise. */ | |
312 | ||
313 | static int | |
13274fc3 | 314 | tui_set_locator_info (struct gdbarch *gdbarch, |
56d397a3 | 315 | const char *fullname, |
08ef48c5 MS |
316 | const char *procname, |
317 | int lineno, | |
7d6dd1e9 | 318 | CORE_ADDR addr) |
c906108c | 319 | { |
3add462f | 320 | struct tui_locator_window *locator = tui_locator_win_info_ptr (); |
b5fca6d7 | 321 | int locator_changed_p = 0; |
7d6dd1e9 | 322 | |
b5fca6d7 PP |
323 | if (procname == NULL) |
324 | procname = ""; | |
325 | ||
326 | if (fullname == NULL) | |
327 | fullname = ""; | |
328 | ||
3add462f | 329 | locator_changed_p |= strncmp (locator->proc_name, procname, |
b5fca6d7 | 330 | MAX_LOCATOR_ELEMENT_LEN) != 0; |
3add462f TT |
331 | locator_changed_p |= lineno != locator->line_no; |
332 | locator_changed_p |= addr != locator->addr; | |
333 | locator_changed_p |= gdbarch != locator->gdbarch; | |
334 | locator_changed_p |= strncmp (locator->full_name, fullname, | |
b5fca6d7 PP |
335 | MAX_LOCATOR_ELEMENT_LEN) != 0; |
336 | ||
3add462f TT |
337 | locator->proc_name[0] = (char) 0; |
338 | strcat_to_buf (locator->proc_name, MAX_LOCATOR_ELEMENT_LEN, procname); | |
339 | locator->line_no = lineno; | |
340 | locator->addr = addr; | |
341 | locator->gdbarch = gdbarch; | |
56d397a3 | 342 | tui_set_locator_fullname (fullname); |
b5fca6d7 PP |
343 | |
344 | return locator_changed_p; | |
c7c228ed | 345 | } |
c906108c | 346 | |
56d397a3 | 347 | /* Update only the full_name portion of the locator. */ |
c906108c | 348 | void |
56d397a3 | 349 | tui_update_locator_fullname (const char *fullname) |
c906108c | 350 | { |
56d397a3 | 351 | tui_set_locator_fullname (fullname); |
47d3492a | 352 | tui_show_locator_content (); |
2e17b763 | 353 | } |
c906108c | 354 | |
b5fca6d7 | 355 | /* Function to print the frame information for the TUI. The windows are |
bbcbf914 | 356 | refreshed only if frame information has changed since the last refresh. |
b5fca6d7 | 357 | |
bbcbf914 PP |
358 | Return 1 if frame information has changed (and windows subsequently |
359 | refreshed), 0 otherwise. */ | |
360 | ||
361 | int | |
47d3492a | 362 | tui_show_frame_info (struct frame_info *fi) |
c906108c | 363 | { |
b5fca6d7 | 364 | int locator_changed_p; |
c906108c SS |
365 | |
366 | if (fi) | |
367 | { | |
3add462f | 368 | struct tui_locator_window *locator = tui_locator_win_info_ptr (); |
6ba8e26f | 369 | int source_already_displayed; |
e3eebbd7 | 370 | CORE_ADDR pc; |
7d6dd1e9 | 371 | |
51abb421 | 372 | symtab_and_line sal = find_frame_sal (fi); |
7d6dd1e9 | 373 | |
a38da35d TT |
374 | const char *fullname = nullptr; |
375 | if (sal.symtab != nullptr) | |
376 | fullname = symtab_to_fullname (sal.symtab); | |
377 | ||
378 | source_already_displayed = (sal.symtab != 0 | |
379 | && TUI_SRC_WIN != nullptr | |
380 | && TUI_SRC_WIN->showing_source_p (fullname)); | |
e3eebbd7 PA |
381 | |
382 | if (get_frame_pc_if_available (fi, &pc)) | |
b5fca6d7 PP |
383 | locator_changed_p |
384 | = tui_set_locator_info (get_frame_arch (fi), | |
385 | (sal.symtab == 0 | |
a38da35d | 386 | ? "??" : fullname), |
b5fca6d7 PP |
387 | tui_get_function_from_frame (fi), |
388 | sal.line, | |
389 | pc); | |
e3eebbd7 | 390 | else |
b5fca6d7 PP |
391 | locator_changed_p |
392 | = tui_set_locator_info (get_frame_arch (fi), | |
393 | "??", _("<unavailable>"), sal.line, 0); | |
394 | ||
395 | /* If the locator information has not changed, then frame information has | |
396 | not changed. If frame information has not changed, then the windows' | |
397 | contents will not change. So don't bother refreshing the windows. */ | |
398 | if (!locator_changed_p) | |
bbcbf914 | 399 | return 0; |
e3eebbd7 | 400 | |
47d3492a | 401 | tui_show_locator_content (); |
ad54d15b | 402 | for (struct tui_source_window_base *win_info : tui_source_windows ()) |
c906108c | 403 | { |
6d012f14 | 404 | if (win_info == TUI_SRC_WIN) |
c906108c | 405 | { |
9ad7fdef TT |
406 | int start_line = (locator->line_no - |
407 | (win_info->viewport_height / 2)) + 1; | |
6d012f14 AC |
408 | if (start_line <= 0) |
409 | start_line = 1; | |
c906108c | 410 | |
362c05fe | 411 | struct tui_line_or_address l; |
1c5313c5 | 412 | |
362c05fe AS |
413 | l.loa = LOA_LINE; |
414 | l.u.line_no = start_line; | |
6ba8e26f | 415 | if (!(source_already_displayed |
3add462f | 416 | && tui_line_is_displayed (locator->line_no, |
9a2b4c1b | 417 | win_info, TRUE))) |
13274fc3 UW |
418 | tui_update_source_window (win_info, get_frame_arch (fi), |
419 | sal.symtab, l, TRUE); | |
c906108c | 420 | else |
a4b99e53 | 421 | { |
3add462f | 422 | l.u.line_no = locator->line_no; |
ad54d15b | 423 | win_info->set_is_exec_point_at (l); |
a4b99e53 | 424 | } |
c906108c SS |
425 | } |
426 | else | |
427 | { | |
9ad7fdef TT |
428 | CORE_ADDR low; |
429 | ||
430 | if (find_pc_partial_function (get_frame_pc (fi), | |
431 | NULL, &low, NULL) == 0) | |
432 | { | |
433 | /* There is no symbol available for current PC. There is no | |
434 | safe way how to "disassemble backwards". */ | |
435 | low = get_frame_pc (fi); | |
436 | } | |
437 | else | |
438 | low = tui_get_low_disassembly_address (get_frame_arch (fi), | |
439 | low, get_frame_pc (fi)); | |
440 | ||
441 | struct tui_line_or_address a; | |
442 | ||
443 | a.loa = LOA_ADDRESS; | |
444 | a.u.addr = low; | |
445 | if (!tui_addr_is_displayed (locator->addr, | |
446 | win_info, TRUE)) | |
447 | tui_update_source_window (win_info, get_frame_arch (fi), | |
448 | sal.symtab, a, TRUE); | |
449 | else | |
c906108c | 450 | { |
9ad7fdef TT |
451 | a.u.addr = locator->addr; |
452 | win_info->set_is_exec_point_at (a); | |
c906108c SS |
453 | } |
454 | } | |
9ad7fdef | 455 | |
7ba913dc | 456 | win_info->update_exec_info (); |
c906108c | 457 | } |
bbcbf914 PP |
458 | |
459 | return 1; | |
c906108c SS |
460 | } |
461 | else | |
462 | { | |
b5fca6d7 PP |
463 | locator_changed_p |
464 | = tui_set_locator_info (NULL, NULL, NULL, 0, (CORE_ADDR) 0); | |
465 | ||
466 | if (!locator_changed_p) | |
bbcbf914 | 467 | return 0; |
b5fca6d7 | 468 | |
47d3492a | 469 | tui_show_locator_content (); |
ad54d15b | 470 | for (struct tui_source_window_base *win_info : tui_source_windows ()) |
c906108c | 471 | { |
caf0bc4e | 472 | tui_clear_source_content (win_info); |
7ba913dc | 473 | win_info->update_exec_info (); |
c906108c | 474 | } |
bbcbf914 PP |
475 | |
476 | return 1; | |
c906108c | 477 | } |
7d6dd1e9 | 478 | } |
c906108c | 479 | |
6ba8e26f AC |
480 | /* Function to initialize gdb commands, for tui window stack |
481 | manipulation. */ | |
2c0b251b | 482 | |
c906108c | 483 | void |
6ba8e26f | 484 | _initialize_tui_stack (void) |
c906108c | 485 | { |
9a2b4c1b MS |
486 | add_com ("update", class_tui, tui_update_command, |
487 | _("Update the source window and locator to " | |
89549d7f | 488 | "display the current execution point.")); |
41783295 | 489 | } |
c906108c | 490 | |
7563e053 | 491 | /* Command to update the display with the current execution point. */ |
c906108c | 492 | static void |
0b39b52e | 493 | tui_update_command (const char *arg, int from_tty) |
c906108c | 494 | { |
95a6b0a1 | 495 | execute_command ("frame 0", from_tty); |
7563e053 | 496 | } |