Line data Source code
1 : /* Unwinding of frames like gstack/pstack.
2 : Copyright (C) 2013-2014 Red Hat, Inc.
3 : This file is part of elfutils.
4 :
5 : This file is free software; you can redistribute it and/or modify
6 : it under the terms of the GNU General Public License as published by
7 : the Free Software Foundation; either version 3 of the License, or
8 : (at your option) any later version.
9 :
10 : elfutils is distributed in the hope that it will be useful, but
11 : WITHOUT ANY WARRANTY; without even the implied warranty of
12 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 : GNU General Public License for more details.
14 :
15 : You should have received a copy of the GNU General Public License
16 : along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 :
18 : #include <config.h>
19 : #include <assert.h>
20 : #include <argp.h>
21 : #include <error.h>
22 : #include <stdlib.h>
23 : #include <inttypes.h>
24 : #include <stdio.h>
25 : #include <stdio_ext.h>
26 : #include <string.h>
27 : #include <locale.h>
28 : #include <fcntl.h>
29 : #include ELFUTILS_HEADER(dwfl)
30 :
31 : #include <dwarf.h>
32 : #include <system.h>
33 :
34 : /* Name and version of program. */
35 : ARGP_PROGRAM_VERSION_HOOK_DEF = print_version;
36 :
37 : /* Bug report address. */
38 : ARGP_PROGRAM_BUG_ADDRESS_DEF = PACKAGE_BUGREPORT;
39 :
40 : /* non-printable argp options. */
41 : #define OPT_DEBUGINFO 0x100
42 : #define OPT_COREFILE 0x101
43 :
44 : static bool show_activation = false;
45 : static bool show_module = false;
46 : static bool show_build_id = false;
47 : static bool show_source = false;
48 : static bool show_one_tid = false;
49 : static bool show_quiet = false;
50 : static bool show_raw = false;
51 : static bool show_modules = false;
52 : static bool show_debugname = false;
53 : static bool show_inlines = false;
54 :
55 : static int maxframes = 256;
56 :
57 : struct frame
58 : {
59 : Dwarf_Addr pc;
60 : bool isactivation;
61 : };
62 :
63 : struct frames
64 : {
65 : int frames;
66 : int allocated;
67 : struct frame *frame;
68 : };
69 :
70 : static Dwfl *dwfl = NULL;
71 : static pid_t pid = 0;
72 : static int core_fd = -1;
73 : static Elf *core = NULL;
74 : static const char *exec = NULL;
75 : static char *debuginfo_path = NULL;
76 :
77 : static const Dwfl_Callbacks proc_callbacks =
78 : {
79 : .find_elf = dwfl_linux_proc_find_elf,
80 : .find_debuginfo = dwfl_standard_find_debuginfo,
81 : .debuginfo_path = &debuginfo_path,
82 : };
83 :
84 : static const Dwfl_Callbacks core_callbacks =
85 : {
86 : .find_elf = dwfl_build_id_find_elf,
87 : .find_debuginfo = dwfl_standard_find_debuginfo,
88 : .debuginfo_path = &debuginfo_path,
89 : };
90 :
91 : #ifdef USE_DEMANGLE
92 : static size_t demangle_buffer_len = 0;
93 : static char *demangle_buffer = NULL;
94 : #endif
95 :
96 : /* Whether any frames have been shown at all. Determines exit status. */
97 : static bool frames_shown = false;
98 :
99 : /* Program exit codes. All frames shown without any errors is GOOD.
100 : Some frames shown with some non-fatal errors is an ERROR. A fatal
101 : error or no frames shown at all is BAD. A command line USAGE exit
102 : is generated by argp_error. */
103 : #define EXIT_OK 0
104 : #define EXIT_ERROR 1
105 : #define EXIT_BAD 2
106 : #define EXIT_USAGE 64
107 :
108 : static int
109 47 : get_addr_width (Dwfl_Module *mod)
110 : {
111 : // Try to find the address wide if possible.
112 : static int width = 0;
113 47 : if (width == 0 && mod)
114 : {
115 : Dwarf_Addr bias;
116 13 : Elf *elf = dwfl_module_getelf (mod, &bias);
117 13 : if (elf)
118 : {
119 : GElf_Ehdr ehdr_mem;
120 13 : GElf_Ehdr *ehdr = gelf_getehdr (elf, &ehdr_mem);
121 13 : if (ehdr)
122 13 : width = ehdr->e_ident[EI_CLASS] == ELFCLASS32 ? 8 : 16;
123 : }
124 : }
125 47 : if (width == 0)
126 0 : width = 16;
127 :
128 47 : return width;
129 : }
130 :
131 : static int
132 0 : module_callback (Dwfl_Module *mod, void **userdata __attribute__((unused)),
133 : const char *name, Dwarf_Addr start,
134 : void *arg __attribute__((unused)))
135 : {
136 : /* Forces resolving of main elf and debug files. */
137 : Dwarf_Addr bias;
138 0 : Elf *elf = dwfl_module_getelf (mod, &bias);
139 0 : Dwarf *dwarf = dwfl_module_getdwarf (mod, &bias);
140 :
141 : Dwarf_Addr end;
142 : const char *mainfile;
143 : const char *debugfile;
144 0 : const char *modname = dwfl_module_info (mod, NULL, NULL, &end, NULL,
145 : NULL, &mainfile, &debugfile);
146 0 : assert (strcmp (modname, name) == 0);
147 :
148 0 : int width = get_addr_width (mod);
149 0 : printf ("0x%0*" PRIx64 "-0x%0*" PRIx64 " %s\n",
150 : width, start, width, end, basename (name));
151 :
152 : const unsigned char *id;
153 : GElf_Addr id_vaddr;
154 0 : int id_len = dwfl_module_build_id (mod, &id, &id_vaddr);
155 0 : if (id_len > 0)
156 : {
157 0 : printf (" [");
158 : do
159 0 : printf ("%02" PRIx8, *id++);
160 0 : while (--id_len > 0);
161 0 : printf ("]\n");
162 : }
163 :
164 0 : if (elf != NULL)
165 0 : printf (" %s\n", mainfile != NULL ? mainfile : "-");
166 0 : if (dwarf != NULL)
167 0 : printf (" %s\n", debugfile != NULL ? debugfile : "-");
168 :
169 0 : return DWARF_CB_OK;
170 : }
171 :
172 : static int
173 35 : frame_callback (Dwfl_Frame *state, void *arg)
174 : {
175 35 : struct frames *frames = (struct frames *) arg;
176 35 : int nr = frames->frames;
177 35 : if (! dwfl_frame_pc (state, &frames->frame[nr].pc,
178 35 : &frames->frame[nr].isactivation))
179 : return -1;
180 :
181 35 : frames->frames++;
182 35 : if (frames->frames == maxframes)
183 : return DWARF_CB_ABORT;
184 :
185 28 : if (frames->frames == frames->allocated)
186 : {
187 0 : frames->allocated *= 2;
188 0 : frames->frame = realloc (frames->frame,
189 0 : sizeof (struct frame) * frames->allocated);
190 0 : if (frames->frame == NULL)
191 0 : error (EXIT_BAD, errno, "realloc frames.frame");
192 : }
193 :
194 : return DWARF_CB_OK;
195 : }
196 :
197 : static const char*
198 28 : die_name (Dwarf_Die *die)
199 : {
200 : Dwarf_Attribute attr;
201 : const char *name;
202 28 : name = dwarf_formstring (dwarf_attr_integrate (die,
203 : DW_AT_MIPS_linkage_name,
204 : &attr)
205 : ?: dwarf_attr_integrate (die,
206 : DW_AT_linkage_name,
207 : &attr));
208 28 : if (name == NULL)
209 24 : name = dwarf_diename (die);
210 :
211 28 : return name;
212 : }
213 :
214 : static void
215 47 : print_frame (int nr, Dwarf_Addr pc, bool isactivation,
216 : Dwarf_Addr pc_adjusted, Dwfl_Module *mod,
217 : const char *symname, Dwarf_Die *cudie,
218 : Dwarf_Die *die)
219 : {
220 47 : int width = get_addr_width (mod);
221 47 : printf ("#%-2u 0x%0*" PRIx64, nr, width, (uint64_t) pc);
222 :
223 47 : if (show_activation)
224 0 : printf ("%4s", ! isactivation ? "- 1" : "");
225 :
226 47 : if (symname != NULL)
227 : {
228 : #ifdef USE_DEMANGLE
229 : // Require GNU v3 ABI by the "_Z" prefix.
230 46 : if (! show_raw && symname[0] == '_' && symname[1] == 'Z')
231 : {
232 5 : int status = -1;
233 5 : char *dsymname = __cxa_demangle (symname, demangle_buffer,
234 : &demangle_buffer_len, &status);
235 5 : if (status == 0)
236 5 : symname = demangle_buffer = dsymname;
237 : }
238 : #endif
239 46 : printf (" %s", symname);
240 : }
241 :
242 : const char* fname;
243 : Dwarf_Addr start;
244 47 : fname = dwfl_module_info(mod, NULL, &start,
245 : NULL, NULL, NULL, NULL, NULL);
246 47 : if (show_module)
247 : {
248 3 : if (fname != NULL)
249 3 : printf (" - %s", fname);
250 : }
251 :
252 47 : if (show_build_id)
253 : {
254 : const unsigned char *id;
255 : GElf_Addr id_vaddr;
256 0 : int id_len = dwfl_module_build_id (mod, &id, &id_vaddr);
257 0 : if (id_len > 0)
258 : {
259 0 : printf ("\n [");
260 : do
261 0 : printf ("%02" PRIx8, *id++);
262 0 : while (--id_len > 0);
263 0 : printf ("]@0x%0" PRIx64 "+0x%" PRIx64,
264 : start, pc_adjusted - start);
265 : }
266 : }
267 :
268 47 : if (show_source)
269 : {
270 : int line, col;
271 : const char* sname;
272 18 : line = col = -1;
273 18 : sname = NULL;
274 18 : if (die != NULL)
275 : {
276 : Dwarf_Files *files;
277 8 : if (dwarf_getsrcfiles (cudie, &files, NULL) == 0)
278 : {
279 : Dwarf_Attribute attr;
280 : Dwarf_Word val;
281 8 : if (dwarf_formudata (dwarf_attr (die, DW_AT_call_file, &attr),
282 : &val) == 0)
283 : {
284 8 : sname = dwarf_filesrc (files, val, NULL, NULL);
285 8 : if (dwarf_formudata (dwarf_attr (die, DW_AT_call_line,
286 : &attr), &val) == 0)
287 : {
288 8 : line = val;
289 8 : if (dwarf_formudata (dwarf_attr (die, DW_AT_call_column,
290 : &attr), &val) == 0)
291 0 : col = val;
292 : }
293 : }
294 : }
295 : }
296 : else
297 : {
298 10 : Dwfl_Line *lineobj = dwfl_module_getsrc(mod, pc_adjusted);
299 10 : if (lineobj)
300 10 : sname = dwfl_lineinfo (lineobj, NULL, &line, &col, NULL, NULL);
301 : }
302 :
303 18 : if (sname != NULL)
304 : {
305 18 : printf ("\n %s", sname);
306 18 : if (line > 0)
307 : {
308 18 : printf (":%d", line);
309 18 : if (col > 0)
310 0 : printf (":%d", col);
311 : }
312 : }
313 : }
314 47 : printf ("\n");
315 47 : }
316 :
317 : static void
318 8 : print_inline_frames (int *nr, Dwarf_Addr pc, bool isactivation,
319 : Dwarf_Addr pc_adjusted, Dwfl_Module *mod,
320 : const char *symname, Dwarf_Die *cudie, Dwarf_Die *die)
321 : {
322 8 : Dwarf_Die *scopes = NULL;
323 8 : int nscopes = dwarf_getscopes_die (die, &scopes);
324 8 : if (nscopes > 0)
325 : {
326 : /* scopes[0] == die, the lowest level, for which we already have
327 : the name. This is the actual source location where it
328 : happened. */
329 8 : print_frame ((*nr)++, pc, isactivation, pc_adjusted, mod, symname,
330 : NULL, NULL);
331 :
332 : /* last_scope is the source location where the next frame/function
333 : call was done. */
334 8 : Dwarf_Die *last_scope = &scopes[0];
335 28 : for (int i = 1; i < nscopes && (maxframes == 0 || *nr < maxframes); i++)
336 : {
337 24 : Dwarf_Die *scope = &scopes[i];
338 24 : int tag = dwarf_tag (scope);
339 48 : if (tag != DW_TAG_inlined_subroutine
340 24 : && tag != DW_TAG_entry_point
341 12 : && tag != DW_TAG_subprogram)
342 8 : continue;
343 :
344 16 : symname = die_name (scope);
345 16 : print_frame ((*nr)++, pc, isactivation, pc_adjusted, mod, symname,
346 : cudie, last_scope);
347 :
348 : /* Found the "top-level" in which everything was inlined? */
349 16 : if (tag == DW_TAG_subprogram)
350 : break;
351 :
352 : last_scope = scope;
353 : }
354 : }
355 8 : free (scopes);
356 8 : }
357 :
358 : static void
359 13 : print_frames (struct frames *frames, pid_t tid, int dwflerr, const char *what)
360 : {
361 13 : if (frames->frames > 0)
362 13 : frames_shown = true;
363 :
364 13 : printf ("TID %d:\n", tid);
365 13 : int frame_nr = 0;
366 57 : for (int nr = 0; nr < frames->frames && (maxframes == 0
367 66 : || frame_nr < maxframes); nr++)
368 : {
369 31 : Dwarf_Addr pc = frames->frame[nr].pc;
370 31 : bool isactivation = frames->frame[nr].isactivation;
371 31 : Dwarf_Addr pc_adjusted = pc - (isactivation ? 0 : 1);
372 :
373 : /* Get PC->SYMNAME. */
374 31 : Dwfl_Module *mod = dwfl_addrmodule (dwfl, pc_adjusted);
375 31 : const char *symname = NULL;
376 : Dwarf_Die die_mem;
377 31 : Dwarf_Die *die = NULL;
378 31 : Dwarf_Die *cudie = NULL;
379 31 : if (mod && ! show_quiet)
380 : {
381 31 : if (show_debugname)
382 : {
383 12 : Dwarf_Addr bias = 0;
384 12 : Dwarf_Die *scopes = NULL;
385 12 : cudie = dwfl_module_addrdie (mod, pc_adjusted, &bias);
386 12 : int nscopes = dwarf_getscopes (cudie, pc_adjusted - bias,
387 : &scopes);
388 :
389 : /* Find the first function-like DIE with a name in scope. */
390 24 : for (int i = 0; symname == NULL && i < nscopes; i++)
391 : {
392 12 : Dwarf_Die *scope = &scopes[i];
393 12 : int tag = dwarf_tag (scope);
394 24 : if (tag == DW_TAG_subprogram
395 12 : || tag == DW_TAG_inlined_subroutine
396 0 : || tag == DW_TAG_entry_point)
397 12 : symname = die_name (scope);
398 :
399 12 : if (symname != NULL)
400 : {
401 12 : die_mem = *scope;
402 12 : die = &die_mem;
403 : }
404 : }
405 12 : free (scopes);
406 : }
407 :
408 31 : if (symname == NULL)
409 19 : symname = dwfl_module_addrname (mod, pc_adjusted);
410 : }
411 :
412 31 : if (show_inlines && die != NULL)
413 8 : print_inline_frames (&frame_nr, pc, isactivation, pc_adjusted, mod,
414 : symname, cudie, die);
415 : else
416 23 : print_frame (frame_nr++, pc, isactivation, pc_adjusted, mod, symname,
417 : NULL, NULL);
418 : }
419 :
420 13 : if (frames->frames > 0 && frame_nr == maxframes)
421 11 : error (0, 0, "tid %d: shown max number of frames "
422 : "(%d, use -n 0 for unlimited)", tid, maxframes);
423 2 : else if (dwflerr != 0)
424 : {
425 1 : if (frames->frames > 0)
426 : {
427 1 : unsigned nr = frames->frames - 1;
428 1 : Dwarf_Addr pc = frames->frame[nr].pc;
429 1 : bool isactivation = frames->frame[nr].isactivation;
430 1 : Dwarf_Addr pc_adjusted = pc - (isactivation ? 0 : 1);
431 1 : Dwfl_Module *mod = dwfl_addrmodule (dwfl, pc_adjusted);
432 1 : const char *mainfile = NULL;
433 1 : const char *modname = dwfl_module_info (mod, NULL, NULL, NULL, NULL,
434 : NULL, &mainfile, NULL);
435 1 : if (modname == NULL || modname[0] == '\0')
436 : {
437 0 : if (mainfile != NULL)
438 0 : modname = mainfile;
439 : else
440 : modname = "<unknown>";
441 : }
442 2 : error (0, 0, "%s tid %d at 0x%" PRIx64 " in %s: %s", what, tid,
443 : pc_adjusted, modname, dwfl_errmsg (dwflerr));
444 : }
445 : else
446 0 : error (0, 0, "%s tid %d: %s", what, tid, dwfl_errmsg (dwflerr));
447 : }
448 13 : }
449 :
450 : static int
451 13 : thread_callback (Dwfl_Thread *thread, void *thread_arg)
452 : {
453 13 : struct frames *frames = (struct frames *) thread_arg;
454 13 : pid_t tid = dwfl_thread_tid (thread);
455 13 : int err = 0;
456 13 : frames->frames = 0;
457 13 : switch (dwfl_thread_getframes (thread, frame_callback, thread_arg))
458 : {
459 : case DWARF_CB_OK:
460 : case DWARF_CB_ABORT:
461 : break;
462 : case -1:
463 5 : err = dwfl_errno ();
464 5 : break;
465 : default:
466 0 : abort ();
467 : }
468 13 : print_frames (frames, tid, err, "dwfl_thread_getframes");
469 13 : return DWARF_CB_OK;
470 : }
471 :
472 : static error_t
473 117 : parse_opt (int key, char *arg __attribute__ ((unused)),
474 : struct argp_state *state)
475 : {
476 117 : switch (key)
477 : {
478 : case 'p':
479 1 : pid = atoi (arg);
480 1 : if (pid == 0)
481 0 : argp_error (state, N_("-p PID should be a positive process id."));
482 : break;
483 :
484 : case OPT_COREFILE:
485 12 : core_fd = open (arg, O_RDONLY);
486 12 : if (core_fd < 0)
487 0 : error (EXIT_BAD, errno, N_("Cannot open core file '%s'"), arg);
488 12 : elf_version (EV_CURRENT);
489 12 : core = elf_begin (core_fd, ELF_C_READ_MMAP, NULL);
490 12 : if (core == NULL)
491 0 : error (EXIT_BAD, 0, "core '%s' elf_begin: %s", arg, elf_errmsg(-1));
492 : break;
493 :
494 : case 'e':
495 12 : exec = arg;
496 12 : break;
497 :
498 : case OPT_DEBUGINFO:
499 0 : debuginfo_path = arg;
500 0 : break;
501 :
502 : case 'm':
503 1 : show_module = true;
504 1 : break;
505 :
506 : case 's':
507 5 : show_source = true;
508 5 : break;
509 :
510 : case 'a':
511 0 : show_activation = true;
512 0 : break;
513 :
514 : case 'd':
515 2 : show_debugname = true;
516 2 : break;
517 :
518 : case 'i':
519 4 : show_inlines = show_debugname = true;
520 4 : break;
521 :
522 : case 'v':
523 0 : show_activation = show_source = show_module = show_debugname = true;
524 0 : show_inlines = true;
525 0 : break;
526 :
527 : case 'b':
528 0 : show_build_id = true;
529 0 : break;
530 :
531 : case 'q':
532 0 : show_quiet = true;
533 0 : break;
534 :
535 : case 'r':
536 4 : show_raw = true;
537 4 : break;
538 :
539 : case '1':
540 0 : show_one_tid = true;
541 0 : break;
542 :
543 : case 'n':
544 11 : maxframes = atoi (arg);
545 11 : if (maxframes < 0)
546 : {
547 0 : argp_error (state, N_("-n MAXFRAMES should be 0 or higher."));
548 0 : return EINVAL;
549 : }
550 : break;
551 :
552 : case 'l':
553 0 : show_modules = true;
554 0 : break;
555 :
556 : case ARGP_KEY_END:
557 13 : if (core == NULL && exec != NULL)
558 0 : argp_error (state,
559 : N_("-e EXEC needs a core given by --core."));
560 :
561 13 : if (pid == 0 && show_one_tid == true)
562 0 : argp_error (state,
563 : N_("-1 needs a thread id given by -p."));
564 :
565 13 : if ((pid == 0 && core == NULL) || (pid != 0 && core != NULL))
566 0 : argp_error (state,
567 : N_("One of -p PID or --core COREFILE should be given."));
568 :
569 13 : if (pid != 0)
570 : {
571 1 : dwfl = dwfl_begin (&proc_callbacks);
572 1 : if (dwfl == NULL)
573 0 : error (EXIT_BAD, 0, "dwfl_begin: %s", dwfl_errmsg (-1));
574 :
575 1 : int err = dwfl_linux_proc_report (dwfl, pid);
576 1 : if (err < 0)
577 0 : error (EXIT_BAD, 0, "dwfl_linux_proc_report pid %d: %s", pid,
578 : dwfl_errmsg (-1));
579 1 : else if (err > 0)
580 0 : error (EXIT_BAD, err, "dwfl_linux_proc_report pid %d", pid);
581 : }
582 :
583 13 : if (core != NULL)
584 : {
585 12 : dwfl = dwfl_begin (&core_callbacks);
586 12 : if (dwfl == NULL)
587 0 : error (EXIT_BAD, 0, "dwfl_begin: %s", dwfl_errmsg (-1));
588 12 : if (dwfl_core_file_report (dwfl, core, exec) < 0)
589 0 : error (EXIT_BAD, 0, "dwfl_core_file_report: %s", dwfl_errmsg (-1));
590 : }
591 :
592 13 : if (dwfl_report_end (dwfl, NULL, NULL) != 0)
593 0 : error (EXIT_BAD, 0, "dwfl_report_end: %s", dwfl_errmsg (-1));
594 :
595 13 : if (pid != 0)
596 : {
597 1 : int err = dwfl_linux_proc_attach (dwfl, pid, false);
598 1 : if (err < 0)
599 0 : error (EXIT_BAD, 0, "dwfl_linux_proc_attach pid %d: %s", pid,
600 : dwfl_errmsg (-1));
601 1 : else if (err > 0)
602 0 : error (EXIT_BAD, err, "dwfl_linux_proc_attach pid %d", pid);
603 : }
604 :
605 13 : if (core != NULL)
606 : {
607 12 : if (dwfl_core_file_attach (dwfl, core) < 0)
608 0 : error (EXIT_BAD, 0, "dwfl_core_file_report: %s", dwfl_errmsg (-1));
609 : }
610 :
611 : /* Makes sure we are properly attached. */
612 13 : if (dwfl_pid (dwfl) < 0)
613 0 : error (EXIT_BAD, 0, "dwfl_pid: %s\n", dwfl_errmsg (-1));
614 : break;
615 :
616 : default:
617 : return ARGP_ERR_UNKNOWN;
618 : }
619 : return 0;
620 : }
621 :
622 : int
623 13 : main (int argc, char **argv)
624 : {
625 : /* We use no threads here which can interfere with handling a stream. */
626 13 : __fsetlocking (stdin, FSETLOCKING_BYCALLER);
627 13 : __fsetlocking (stdout, FSETLOCKING_BYCALLER);
628 13 : __fsetlocking (stderr, FSETLOCKING_BYCALLER);
629 :
630 : /* Set locale. */
631 13 : (void) setlocale (LC_ALL, "");
632 :
633 13 : const struct argp_option options[] =
634 : {
635 : { NULL, 0, NULL, 0, N_("Input selection options:"), 0 },
636 : { "pid", 'p', "PID", 0,
637 : N_("Show stack of process PID"), 0 },
638 : { "core", OPT_COREFILE, "COREFILE", 0,
639 : N_("Show stack found in COREFILE"), 0 },
640 : { "executable", 'e', "EXEC", 0, N_("(optional) EXECUTABLE that produced COREFILE"), 0 },
641 : { "debuginfo-path", OPT_DEBUGINFO, "PATH", 0,
642 : N_("Search path for separate debuginfo files"), 0 },
643 :
644 : { NULL, 0, NULL, 0, N_("Output selection options:"), 0 },
645 : { "activation", 'a', NULL, 0,
646 : N_("Additionally show frame activation"), 0 },
647 : { "debugname", 'd', NULL, 0,
648 : N_("Additionally try to lookup DWARF debuginfo name for frame address"),
649 : 0 },
650 : { "inlines", 'i', NULL, 0,
651 : N_("Additionally show inlined function frames using DWARF debuginfo if available (implies -d)"), 0 },
652 : { "module", 'm', NULL, 0,
653 : N_("Additionally show module file information"), 0 },
654 : { "source", 's', NULL, 0,
655 : N_("Additionally show source file information"), 0 },
656 : { "verbose", 'v', NULL, 0,
657 : N_("Show all additional information (activation, debugname, inlines, module and source)"), 0 },
658 : { "quiet", 'q', NULL, 0,
659 : N_("Do not resolve address to function symbol name"), 0 },
660 : { "raw", 'r', NULL, 0,
661 : N_("Show raw function symbol names, do not try to demangle names"), 0 },
662 : { "build-id", 'b', NULL, 0,
663 : N_("Show module build-id, load address and pc offset"), 0 },
664 : { NULL, '1', NULL, 0,
665 : N_("Show the backtrace of only one thread"), 0 },
666 : { NULL, 'n', "MAXFRAMES", 0,
667 : N_("Show at most MAXFRAMES per thread (default 256, use 0 for unlimited)"), 0 },
668 : { "list-modules", 'l', NULL, 0,
669 : N_("Show module memory map with build-id, elf and debug files detected"), 0 },
670 : { NULL, 0, NULL, 0, NULL, 0 }
671 : };
672 :
673 13 : const struct argp argp =
674 : {
675 : .options = options,
676 : .parser = parse_opt,
677 : .doc = N_("Print a stack for each thread in a process or core file.\v\
678 : Program exits with return code 0 if all frames were shown without \
679 : any errors. If some frames were shown, but there were some non-fatal \
680 : errors, possibly causing an incomplete backtrace, the program exits \
681 : with return code 1. If no frames could be shown, or a fatal error \
682 : occured the program exits with return code 2. If the program was \
683 : invoked with bad or missing arguments it will exit with return code 64.")
684 : };
685 :
686 13 : argp_parse (&argp, argc, argv, 0, NULL, NULL);
687 :
688 13 : if (show_modules)
689 : {
690 0 : printf ("PID %d - %s module memory map\n", dwfl_pid (dwfl),
691 0 : pid != 0 ? "process" : "core");
692 0 : if (dwfl_getmodules (dwfl, module_callback, NULL, 0) != 0)
693 0 : error (EXIT_BAD, 0, "dwfl_getmodules: %s", dwfl_errmsg (-1));
694 : }
695 :
696 : struct frames frames;
697 : /* When maxframes is zero, then 2048 is just the initial allocation
698 : that will be increased using realloc in framecallback (). */
699 13 : frames.allocated = maxframes == 0 ? 2048 : maxframes;
700 13 : frames.frames = 0;
701 13 : frames.frame = malloc (sizeof (struct frame) * frames.allocated);
702 13 : if (frames.frame == NULL)
703 0 : error (EXIT_BAD, errno, "malloc frames.frame");
704 :
705 13 : if (show_one_tid)
706 : {
707 0 : int err = 0;
708 0 : switch (dwfl_getthread_frames (dwfl, pid, frame_callback, &frames))
709 : {
710 : case DWARF_CB_OK:
711 : case DWARF_CB_ABORT:
712 : break;
713 : case -1:
714 0 : err = dwfl_errno ();
715 0 : break;
716 : default:
717 0 : abort ();
718 : }
719 0 : print_frames (&frames, pid, err, "dwfl_getthread_frames");
720 : }
721 : else
722 : {
723 13 : printf ("PID %d - %s\n", dwfl_pid (dwfl), pid != 0 ? "process" : "core");
724 13 : switch (dwfl_getthreads (dwfl, thread_callback, &frames))
725 : {
726 : case DWARF_CB_OK:
727 : case DWARF_CB_ABORT:
728 : break;
729 : case -1:
730 0 : error (0, 0, "dwfl_getthreads: %s", dwfl_errmsg (-1));
731 : break;
732 : default:
733 0 : abort ();
734 : }
735 : }
736 13 : free (frames.frame);
737 13 : dwfl_end (dwfl);
738 :
739 13 : if (core != NULL)
740 12 : elf_end (core);
741 :
742 13 : if (core_fd != -1)
743 12 : close (core_fd);
744 :
745 : #ifdef USE_DEMANGLE
746 13 : free (demangle_buffer);
747 : #endif
748 :
749 13 : if (! frames_shown)
750 : error (EXIT_BAD, 0, N_("Couldn't show any frames."));
751 :
752 13 : return error_message_count != 0 ? EXIT_ERROR : EXIT_OK;
753 : }
|
