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44122162 | 1 | /* Machine independent support for Solaris /proc (process file system) for GDB. |
2555fe1a | 2 | |
1d506c26 | 3 | Copyright (C) 1999-2024 Free Software Foundation, Inc. |
2555fe1a | 4 | |
0fda6bd2 JM |
5 | Written by Michael Snyder at Cygnus Solutions. |
6 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
7 | ||
a9762ec7 JB |
8 | This file is part of GDB. |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
0fda6bd2 JM |
22 | |
23 | /* | |
24 | * Pretty-print trace of api calls to the /proc api | |
0fda6bd2 JM |
25 | */ |
26 | ||
5b9707eb | 27 | #include "cli/cli-cmds.h" |
8e40d292 | 28 | #include "completer.h" |
0fda6bd2 | 29 | |
0fda6bd2 JM |
30 | #include <sys/types.h> |
31 | #include <sys/procfs.h> | |
ef0f16cc TT |
32 | #include <sys/proc.h> |
33 | #include <sys/user.h> | |
34 | #include <fcntl.h> | |
268a13a5 | 35 | #include "gdbsupport/gdb_wait.h" |
0fda6bd2 JM |
36 | |
37 | #include "proc-utils.h" | |
38 | ||
39 | /* Much of the information used in the /proc interface, particularly for | |
40 | printing status information, is kept as tables of structures of the | |
41 | following form. These tables can be used to map numeric values to | |
0df8b418 | 42 | their symbolic names and to a string that describes their specific use. */ |
0fda6bd2 JM |
43 | |
44 | struct trans { | |
45 | long value; /* The numeric value */ | |
995816ba PA |
46 | const char *name; /* The equivalent symbolic value */ |
47 | const char *desc; /* Short description of value */ | |
0fda6bd2 JM |
48 | }; |
49 | ||
491144b5 | 50 | static bool procfs_trace = false; |
0fda6bd2 | 51 | static FILE *procfs_file = NULL; |
e0700ba4 | 52 | static std::string procfs_filename = "procfs_trace"; |
0fda6bd2 | 53 | |
103b3ef5 MS |
54 | static void |
55 | prepare_to_trace (void) | |
56 | { | |
57 | if (procfs_trace) /* if procfs tracing turned on */ | |
58 | if (procfs_file == NULL) /* if output file not yet open */ | |
e0700ba4 | 59 | procfs_file = fopen (procfs_filename.c_str (), "a"); /* open output file */ |
103b3ef5 MS |
60 | } |
61 | ||
0fda6bd2 | 62 | static void |
eb4c3f4a TT |
63 | set_procfs_trace_cmd (const char *args, |
64 | int from_tty, struct cmd_list_element *c) | |
0fda6bd2 JM |
65 | { |
66 | #if 0 /* not sure what I might actually need to do here, if anything */ | |
67 | if (procfs_file) | |
68 | fflush (procfs_file); | |
69 | #endif | |
70 | } | |
71 | ||
72 | static void | |
eb4c3f4a TT |
73 | set_procfs_file_cmd (const char *args, |
74 | int from_tty, struct cmd_list_element *c) | |
0fda6bd2 JM |
75 | { |
76 | /* Just changed the filename for procfs tracing. | |
77 | If a file was already open, close it. */ | |
78 | if (procfs_file) | |
79 | fclose (procfs_file); | |
80 | procfs_file = NULL; | |
81 | } | |
82 | ||
0fda6bd2 | 83 | static struct trans rw_table[] = { |
0fda6bd2 | 84 | { PCAGENT, "PCAGENT", "create agent lwp with regs from argument" }, |
0fda6bd2 | 85 | { PCCFAULT, "PCCFAULT", "clear current fault" }, |
0fda6bd2 | 86 | { PCCSIG, "PCCSIG", "clear current signal" }, |
0fda6bd2 JM |
87 | { PCDSTOP, "PCDSTOP", "post stop request" }, |
88 | { PCKILL, "PCKILL", "post a signal" }, | |
89 | { PCNICE, "PCNICE", "set nice priority" }, | |
0fda6bd2 JM |
90 | { PCREAD, "PCREAD", "read from the address space" }, |
91 | { PCWRITE, "PCWRITE", "write to the address space" }, | |
0fda6bd2 | 92 | { PCRUN, "PCRUN", "make process/lwp runnable" }, |
0fda6bd2 | 93 | { PCSASRS, "PCSASRS", "set ancillary state registers" }, |
0fda6bd2 | 94 | { PCSCRED, "PCSCRED", "set process credentials" }, |
0fda6bd2 JM |
95 | { PCSENTRY, "PCSENTRY", "set traced syscall entry set" }, |
96 | { PCSET, "PCSET", "set modes" }, | |
97 | { PCSEXIT, "PCSEXIT", "set traced syscall exit set" }, | |
98 | { PCSFAULT, "PCSFAULT", "set traced fault set" }, | |
99 | { PCSFPREG, "PCSFPREG", "set floating point registers" }, | |
100 | { PCSHOLD, "PCSHOLD", "set signal mask" }, | |
101 | { PCSREG, "PCSREG", "set general registers" }, | |
102 | { PCSSIG, "PCSSIG", "set current signal" }, | |
103 | { PCSTOP, "PCSTOP", "post stop request and wait" }, | |
104 | { PCSTRACE, "PCSTRACE", "set traced signal set" }, | |
0fda6bd2 | 105 | { PCSVADDR, "PCSVADDR", "set pc virtual address" }, |
0fda6bd2 | 106 | { PCSXREG, "PCSXREG", "set extra registers" }, |
0fda6bd2 | 107 | { PCTWSTOP, "PCTWSTOP", "wait for stop, with timeout arg" }, |
0fda6bd2 | 108 | { PCUNKILL, "PCUNKILL", "delete a pending signal" }, |
0fda6bd2 | 109 | { PCUNSET, "PCUNSET", "unset modes" }, |
0fda6bd2 | 110 | { PCWATCH, "PCWATCH", "set/unset watched memory area" }, |
0fda6bd2 JM |
111 | { PCWSTOP, "PCWSTOP", "wait for process/lwp to stop, no timeout" }, |
112 | { 0, NULL, NULL } | |
113 | }; | |
114 | ||
115 | static off_t lseek_offset; | |
116 | ||
117 | int | |
fba45db2 | 118 | write_with_trace (int fd, void *varg, size_t len, char *file, int line) |
0fda6bd2 | 119 | { |
1e52e2eb | 120 | int i = ARRAY_SIZE (rw_table) - 1; |
0fda6bd2 | 121 | int ret; |
37de36c6 | 122 | procfs_ctl_t *arg = (procfs_ctl_t *) varg; |
0fda6bd2 | 123 | |
103b3ef5 | 124 | prepare_to_trace (); |
0fda6bd2 JM |
125 | if (procfs_trace) |
126 | { | |
37de36c6 | 127 | procfs_ctl_t opcode = arg[0]; |
0fda6bd2 JM |
128 | for (i = 0; rw_table[i].name != NULL; i++) |
129 | if (rw_table[i].value == opcode) | |
130 | break; | |
131 | ||
132 | if (info_verbose) | |
133 | fprintf (procfs_file ? procfs_file : stdout, | |
134 | "%s:%d -- ", file, line); | |
135 | switch (opcode) { | |
136 | case PCSET: | |
137 | fprintf (procfs_file ? procfs_file : stdout, | |
138 | "write (PCSET, %s) %s\n", | |
139 | arg[1] == PR_FORK ? "PR_FORK" : | |
140 | arg[1] == PR_RLC ? "PR_RLC" : | |
0fda6bd2 | 141 | arg[1] == PR_ASYNC ? "PR_ASYNC" : |
0fda6bd2 JM |
142 | "<unknown flag>", |
143 | info_verbose ? rw_table[i].desc : ""); | |
144 | break; | |
0fda6bd2 | 145 | case PCUNSET: |
0fda6bd2 JM |
146 | fprintf (procfs_file ? procfs_file : stdout, |
147 | "write (PCRESET, %s) %s\n", | |
148 | arg[1] == PR_FORK ? "PR_FORK" : | |
149 | arg[1] == PR_RLC ? "PR_RLC" : | |
0fda6bd2 | 150 | arg[1] == PR_ASYNC ? "PR_ASYNC" : |
0fda6bd2 JM |
151 | "<unknown flag>", |
152 | info_verbose ? rw_table[i].desc : ""); | |
153 | break; | |
154 | case PCSTRACE: | |
155 | fprintf (procfs_file ? procfs_file : stdout, | |
156 | "write (PCSTRACE) "); | |
157 | proc_prettyfprint_signalset (procfs_file ? procfs_file : stdout, | |
158 | (sigset_t *) &arg[1], 0); | |
159 | break; | |
160 | case PCSFAULT: | |
161 | fprintf (procfs_file ? procfs_file : stdout, | |
162 | "write (PCSFAULT) "); | |
163 | proc_prettyfprint_faultset (procfs_file ? procfs_file : stdout, | |
164 | (fltset_t *) &arg[1], 0); | |
165 | break; | |
166 | case PCSENTRY: | |
167 | fprintf (procfs_file ? procfs_file : stdout, | |
168 | "write (PCSENTRY) "); | |
169 | proc_prettyfprint_syscalls (procfs_file ? procfs_file : stdout, | |
170 | (sysset_t *) &arg[1], 0); | |
171 | break; | |
172 | case PCSEXIT: | |
173 | fprintf (procfs_file ? procfs_file : stdout, | |
174 | "write (PCSEXIT) "); | |
175 | proc_prettyfprint_syscalls (procfs_file ? procfs_file : stdout, | |
176 | (sysset_t *) &arg[1], 0); | |
177 | break; | |
178 | case PCSHOLD: | |
179 | fprintf (procfs_file ? procfs_file : stdout, | |
180 | "write (PCSHOLD) "); | |
181 | proc_prettyfprint_signalset (procfs_file ? procfs_file : stdout, | |
182 | (sigset_t *) &arg[1], 0); | |
183 | break; | |
184 | case PCSSIG: | |
185 | fprintf (procfs_file ? procfs_file : stdout, | |
186 | "write (PCSSIG) "); | |
187 | proc_prettyfprint_signal (procfs_file ? procfs_file : stdout, | |
188 | arg[1] ? ((siginfo_t *) &arg[1])->si_signo | |
dda83cd7 | 189 | : 0, |
0fda6bd2 JM |
190 | 0); |
191 | fprintf (procfs_file ? procfs_file : stdout, "\n"); | |
192 | break; | |
193 | case PCRUN: | |
194 | fprintf (procfs_file ? procfs_file : stdout, | |
195 | "write (PCRUN) "); | |
196 | if (arg[1] & PRCSIG) | |
197 | fprintf (procfs_file ? procfs_file : stdout, "clearSig "); | |
198 | if (arg[1] & PRCFAULT) | |
199 | fprintf (procfs_file ? procfs_file : stdout, "clearFlt "); | |
200 | if (arg[1] & PRSTEP) | |
201 | fprintf (procfs_file ? procfs_file : stdout, "step "); | |
202 | if (arg[1] & PRSABORT) | |
203 | fprintf (procfs_file ? procfs_file : stdout, "syscallAbort "); | |
204 | if (arg[1] & PRSTOP) | |
205 | fprintf (procfs_file ? procfs_file : stdout, "stopReq "); | |
206 | ||
207 | fprintf (procfs_file ? procfs_file : stdout, "\n"); | |
208 | break; | |
209 | case PCKILL: | |
210 | fprintf (procfs_file ? procfs_file : stdout, | |
211 | "write (PCKILL) "); | |
212 | proc_prettyfprint_signal (procfs_file ? procfs_file : stdout, | |
213 | arg[1], 0); | |
214 | fprintf (procfs_file ? procfs_file : stdout, "\n"); | |
215 | break; | |
216 | default: | |
217 | { | |
37de36c6 | 218 | if (rw_table[i].name) |
0fda6bd2 JM |
219 | fprintf (procfs_file ? procfs_file : stdout, |
220 | "write (%s) %s\n", | |
221 | rw_table[i].name, | |
222 | info_verbose ? rw_table[i].desc : ""); | |
223 | else | |
224 | { | |
225 | if (lseek_offset != -1) | |
226 | fprintf (procfs_file ? procfs_file : stdout, | |
b943d152 MS |
227 | "write (<unknown>, %lud bytes at 0x%08lx) \n", |
228 | (unsigned long) len, (unsigned long) lseek_offset); | |
0fda6bd2 JM |
229 | else |
230 | fprintf (procfs_file ? procfs_file : stdout, | |
b943d152 MS |
231 | "write (<unknown>, %lud bytes) \n", |
232 | (unsigned long) len); | |
0fda6bd2 JM |
233 | } |
234 | break; | |
235 | } | |
236 | } | |
237 | if (procfs_file) | |
238 | fflush (procfs_file); | |
239 | } | |
103b3ef5 | 240 | errno = 0; |
b943d152 | 241 | ret = write (fd, (void *) arg, len); |
0fda6bd2 JM |
242 | if (procfs_trace && ret != len) |
243 | { | |
244 | fprintf (procfs_file ? procfs_file : stdout, | |
103b3ef5 | 245 | "[write (%s) FAILED! (%s)]\n", |
0fda6bd2 | 246 | rw_table[i].name != NULL ? |
103b3ef5 MS |
247 | rw_table[i].name : "<unknown>", |
248 | safe_strerror (errno)); | |
0fda6bd2 JM |
249 | if (procfs_file) |
250 | fflush (procfs_file); | |
251 | } | |
252 | ||
253 | lseek_offset = -1; | |
254 | return ret; | |
255 | } | |
256 | ||
257 | off_t | |
fba45db2 | 258 | lseek_with_trace (int fd, off_t offset, int whence, char *file, int line) |
0fda6bd2 JM |
259 | { |
260 | off_t ret; | |
261 | ||
103b3ef5 MS |
262 | prepare_to_trace (); |
263 | errno = 0; | |
0fda6bd2 JM |
264 | ret = lseek (fd, offset, whence); |
265 | lseek_offset = ret; | |
103b3ef5 | 266 | if (procfs_trace && (ret == -1 || errno != 0)) |
0fda6bd2 | 267 | { |
0fda6bd2 | 268 | fprintf (procfs_file ? procfs_file : stdout, |
103b3ef5 MS |
269 | "[lseek (0x%08lx) FAILED! (%s)]\n", |
270 | (unsigned long) offset, safe_strerror (errno)); | |
0fda6bd2 JM |
271 | if (procfs_file) |
272 | fflush (procfs_file); | |
273 | } | |
274 | ||
275 | return ret; | |
276 | } | |
277 | ||
0fda6bd2 | 278 | int |
fba45db2 | 279 | open_with_trace (char *filename, int mode, char *file, int line) |
0fda6bd2 | 280 | { |
103b3ef5 | 281 | int ret; |
0fda6bd2 | 282 | |
103b3ef5 MS |
283 | prepare_to_trace (); |
284 | errno = 0; | |
285 | ret = open (filename, mode); | |
0fda6bd2 JM |
286 | if (procfs_trace) |
287 | { | |
0fda6bd2 JM |
288 | if (info_verbose) |
289 | fprintf (procfs_file ? procfs_file : stdout, | |
290 | "%s:%d -- ", file, line); | |
103b3ef5 MS |
291 | |
292 | if (errno) | |
293 | { | |
294 | fprintf (procfs_file ? procfs_file : stdout, | |
295 | "[open FAILED! (%s) line %d]\\n", | |
296 | safe_strerror (errno), line); | |
297 | } | |
298 | else | |
299 | { | |
300 | fprintf (procfs_file ? procfs_file : stdout, | |
301 | "%d = open (%s, ", ret, filename); | |
302 | if (mode == O_RDONLY) | |
303 | fprintf (procfs_file ? procfs_file : stdout, "O_RDONLY) %d\n", | |
304 | line); | |
305 | else if (mode == O_WRONLY) | |
306 | fprintf (procfs_file ? procfs_file : stdout, "O_WRONLY) %d\n", | |
307 | line); | |
308 | else if (mode == O_RDWR) | |
309 | fprintf (procfs_file ? procfs_file : stdout, "O_RDWR) %d\n", | |
310 | line); | |
311 | } | |
0fda6bd2 JM |
312 | if (procfs_file) |
313 | fflush (procfs_file); | |
314 | } | |
315 | ||
316 | return ret; | |
317 | } | |
318 | ||
319 | int | |
fba45db2 | 320 | close_with_trace (int fd, char *file, int line) |
0fda6bd2 | 321 | { |
103b3ef5 | 322 | int ret; |
0fda6bd2 | 323 | |
103b3ef5 MS |
324 | prepare_to_trace (); |
325 | errno = 0; | |
326 | ret = close (fd); | |
0fda6bd2 JM |
327 | if (procfs_trace) |
328 | { | |
0fda6bd2 JM |
329 | if (info_verbose) |
330 | fprintf (procfs_file ? procfs_file : stdout, | |
331 | "%s:%d -- ", file, line); | |
103b3ef5 MS |
332 | if (errno) |
333 | fprintf (procfs_file ? procfs_file : stdout, | |
334 | "[close FAILED! (%s)]\n", safe_strerror (errno)); | |
335 | else | |
336 | fprintf (procfs_file ? procfs_file : stdout, | |
337 | "%d = close (%d)\n", ret, fd); | |
0fda6bd2 JM |
338 | if (procfs_file) |
339 | fflush (procfs_file); | |
340 | } | |
341 | ||
342 | return ret; | |
343 | } | |
344 | ||
103b3ef5 | 345 | pid_t |
fba45db2 | 346 | wait_with_trace (int *wstat, char *file, int line) |
0fda6bd2 JM |
347 | { |
348 | int ret, lstat = 0; | |
349 | ||
103b3ef5 | 350 | prepare_to_trace (); |
0fda6bd2 JM |
351 | if (procfs_trace) |
352 | { | |
0fda6bd2 JM |
353 | if (info_verbose) |
354 | fprintf (procfs_file ? procfs_file : stdout, | |
355 | "%s:%d -- ", file, line); | |
356 | fprintf (procfs_file ? procfs_file : stdout, | |
357 | "wait (line %d) ", line); | |
358 | if (procfs_file) | |
359 | fflush (procfs_file); | |
360 | } | |
103b3ef5 | 361 | errno = 0; |
0fda6bd2 JM |
362 | ret = wait (&lstat); |
363 | if (procfs_trace) | |
364 | { | |
103b3ef5 MS |
365 | if (errno) |
366 | fprintf (procfs_file ? procfs_file : stdout, | |
367 | "[wait FAILED! (%s)]\n", safe_strerror (errno)); | |
368 | else | |
369 | fprintf (procfs_file ? procfs_file : stdout, | |
370 | "returned pid %d, status 0x%x\n", ret, lstat); | |
0fda6bd2 JM |
371 | if (procfs_file) |
372 | fflush (procfs_file); | |
373 | } | |
374 | if (wstat) | |
375 | *wstat = lstat; | |
376 | ||
377 | return ret; | |
378 | } | |
379 | ||
380 | void | |
995816ba | 381 | procfs_note (const char *msg, const char *file, int line) |
0fda6bd2 | 382 | { |
103b3ef5 | 383 | prepare_to_trace (); |
0fda6bd2 JM |
384 | if (procfs_trace) |
385 | { | |
0fda6bd2 JM |
386 | if (info_verbose) |
387 | fprintf (procfs_file ? procfs_file : stdout, | |
388 | "%s:%d -- ", file, line); | |
e34e1a85 | 389 | fprintf (procfs_file ? procfs_file : stdout, "%s", msg); |
0fda6bd2 JM |
390 | if (procfs_file) |
391 | fflush (procfs_file); | |
392 | } | |
393 | } | |
394 | ||
395 | void | |
fba45db2 | 396 | proc_prettyfprint_status (long flags, int why, int what, int thread) |
0fda6bd2 | 397 | { |
103b3ef5 | 398 | prepare_to_trace (); |
0fda6bd2 JM |
399 | if (procfs_trace) |
400 | { | |
0fda6bd2 JM |
401 | if (thread) |
402 | fprintf (procfs_file ? procfs_file : stdout, | |
403 | "Thread %d: ", thread); | |
404 | ||
405 | proc_prettyfprint_flags (procfs_file ? procfs_file : stdout, | |
406 | flags, 0); | |
407 | ||
408 | if (flags & (PR_STOPPED | PR_ISTOP)) | |
409 | proc_prettyfprint_why (procfs_file ? procfs_file : stdout, | |
410 | why, what, 0); | |
411 | if (procfs_file) | |
412 | fflush (procfs_file); | |
413 | } | |
414 | } | |
415 | ||
6c265988 | 416 | void _initialize_proc_api (); |
0fda6bd2 | 417 | void |
6c265988 | 418 | _initialize_proc_api () |
0fda6bd2 | 419 | { |
54433e38 MK |
420 | add_setshow_boolean_cmd ("procfs-trace", no_class, &procfs_trace, _("\ |
421 | Set tracing for /proc api calls."), _("\ | |
422 | Show tracing for /proc api calls."), NULL, | |
5bf193a2 AC |
423 | set_procfs_trace_cmd, |
424 | NULL, /* FIXME: i18n: */ | |
425 | &setlist, &showlist); | |
0fda6bd2 | 426 | |
54433e38 MK |
427 | add_setshow_filename_cmd ("procfs-file", no_class, &procfs_filename, _("\ |
428 | Set filename for /proc tracefile."), _("\ | |
429 | Show filename for /proc tracefile."), NULL, | |
f397e303 AC |
430 | set_procfs_file_cmd, |
431 | NULL, /* FIXME: i18n: */ | |
432 | &setlist, &showlist); | |
0fda6bd2 | 433 | } |