1 |
/************************************************************************* |
2 |
* |
3 |
* $Id: stacktrace.c,v 1.1 2004-10-08 20:30:25 schoenebeck Exp $ |
4 |
* |
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* Copyright (c) 1998 by Bjorn Reese <breese@mail1.stofanet.dk> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
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* MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND |
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* CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER. |
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* |
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************************************************************************ |
17 |
* |
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* 1999/08/19 - breese |
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* - Cleaned up the interface |
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* |
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* 1999/08/06 - breese |
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* - Added U_STACK_TRACE for HP/UX |
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* |
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* 1999/01/24 - breese |
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* - Added GCC_DumpStack |
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* |
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* 1998/12/21 - breese |
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* - Fixed include files and arguments for waitpid() |
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* - Made an AIX workaround for waitpid() exiting with EINTR |
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* - Added a missing 'quit' command for OSF dbx |
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* |
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************************************************************************/ |
33 |
|
34 |
#if defined(unix) || defined(__unix) || defined(__xlC__) |
35 |
# define PLATFORM_UNIX |
36 |
#elif defined(WIN32) || defined(_WIN32) |
37 |
# define PLATFORM_WIN32 |
38 |
#endif |
39 |
|
40 |
#if defined(_AIX) || defined(__xlC__) |
41 |
# define PLATFORM_AIX |
42 |
#elif defined(__FreeBSD__) |
43 |
# define PLATFORM_FREEBSD |
44 |
#elif defined(hpux) || defined(__hpux) || defined(_HPUX_SOURCE) |
45 |
# define PLATFORM_HPUX |
46 |
#elif defined(sgi) || defined(mips) || defined(_SGI_SOURCE) |
47 |
# define PLATFORM_IRIX |
48 |
#elif defined(__osf__) |
49 |
# define PLATFORM_OSF |
50 |
#elif defined(M_I386) || defined(_SCO_DS) || defined(_SCO_C_DIALECT) |
51 |
# define PLATFORM_SCO |
52 |
#elif defined(sun) || defined(__sun__) || defined(__SUNPRO_C) |
53 |
# if defined(__SVR4) || defined(__svr4__) |
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# define PLATFORM_SOLARIS |
55 |
# endif |
56 |
#endif |
57 |
|
58 |
/* ANSI C includes */ |
59 |
#include <stdio.h> |
60 |
#include <stdlib.h> |
61 |
#include <stdarg.h> |
62 |
#include <string.h> |
63 |
#include <limits.h> |
64 |
#include <errno.h> |
65 |
#include <signal.h> |
66 |
#if defined(PLATFORM_UNIX) |
67 |
# include <unistd.h> |
68 |
# include <sys/types.h> |
69 |
# include <sys/wait.h> |
70 |
# if defined(PLATFORM_IRIX) && defined(USE_BUILTIN) |
71 |
/* Compile with -DUSE_BUILTIN and -lexc */ |
72 |
# include <libexc.h> |
73 |
# elif defined(PLATFORM_HPUX) && defined(USE_BUILTIN) |
74 |
/* Compile with -DUSE_BUILTIN and -lcl */ |
75 |
extern void U_STACK_TRACE(void); |
76 |
# endif |
77 |
#endif |
78 |
|
79 |
#include "stacktrace.h" |
80 |
|
81 |
#ifndef FALSE |
82 |
# define FALSE (0 == 1) |
83 |
# define TRUE (! FALSE) |
84 |
#endif |
85 |
|
86 |
#define SYS_ERROR -1 |
87 |
|
88 |
#ifndef EXIT_SUCCESS |
89 |
# define EXIT_SUCCESS 0 |
90 |
#endif |
91 |
#ifndef EXIT_FAILURE |
92 |
# define EXIT_FAILURE 1 |
93 |
#endif |
94 |
|
95 |
#define MAX_BUFFER_SIZE 512 |
96 |
#if defined(__GNUC__) |
97 |
/* Change the code if ADDRESSLIST_SIZE is increased */ |
98 |
# define ADDRESSLIST_SIZE 20 |
99 |
#endif |
100 |
|
101 |
/************************************************************************* |
102 |
* Globals |
103 |
* |
104 |
* We cannot pass custom arguments to signal handlers so we store |
105 |
* them as global variables (but limit their scope to this file.) |
106 |
*/ |
107 |
static const char *global_progname; |
108 |
static int global_output = STDOUT_FILENO; |
109 |
|
110 |
|
111 |
#if defined(PLATFORM_UNIX) |
112 |
/************************************************************************* |
113 |
* my_pclose [private] |
114 |
*/ |
115 |
static void my_pclose(int fd, int pid) |
116 |
{ |
117 |
close(fd); |
118 |
/* Make sure the the child process has terminated */ |
119 |
(void)kill(pid, SIGTERM); |
120 |
} |
121 |
|
122 |
/************************************************************************* |
123 |
* my_popen [private] |
124 |
*/ |
125 |
static int my_popen(const char *command, pid_t *pid) |
126 |
{ |
127 |
int rc; |
128 |
//int pipefd[2]; |
129 |
|
130 |
//FIXME: deactivated separate piping of debugger output, as it caused problems in conjunction with threads |
131 |
//rc = pipe(pipefd); |
132 |
rc = SYS_ERROR; |
133 |
//if (SYS_ERROR != rc) |
134 |
{ |
135 |
*pid = fork(); |
136 |
switch (*pid) |
137 |
{ |
138 |
case SYS_ERROR: |
139 |
//rc = SYS_ERROR; |
140 |
//close(pipefd[0]); |
141 |
//close(pipefd[1]); |
142 |
break; |
143 |
|
144 |
case 0: /* Child */ |
145 |
//close(pipefd[0]); |
146 |
//close(STDOUT_FILENO); |
147 |
//close(STDERR_FILENO); |
148 |
//dup2(pipefd[1], STDOUT_FILENO); |
149 |
//dup2(pipefd[1], STDERR_FILENO); |
150 |
/* |
151 |
* The System() call assumes that /bin/sh is |
152 |
* always available, and so will we. |
153 |
*/ |
154 |
execl("/bin/sh", "/bin/sh", "-c", command, NULL); |
155 |
_exit(EXIT_FAILURE); |
156 |
break; |
157 |
|
158 |
default: /* Parent */ |
159 |
//close(pipefd[1]); |
160 |
//rc = pipefd[0]; |
161 |
break; |
162 |
} /* switch */ |
163 |
} |
164 |
return rc; |
165 |
} |
166 |
|
167 |
/************************************************************************* |
168 |
* my_getline [private] |
169 |
*/ |
170 |
static int my_getline(int fd, char *buffer, int max) |
171 |
{ |
172 |
char c; |
173 |
int i = 0; |
174 |
|
175 |
do { |
176 |
if (read(fd, &c, 1) < 1) |
177 |
return 0; |
178 |
if (i < max) |
179 |
buffer[i++] = c; |
180 |
} while (c != '\n'); |
181 |
buffer[i] = (char)0; |
182 |
return i; |
183 |
} |
184 |
|
185 |
/************************************************************************* |
186 |
* GCC_DumpStack [private] |
187 |
* |
188 |
* |
189 |
* This code is still experimental. |
190 |
* |
191 |
* Stackbased arrays are used to prevent allocating from the heap. |
192 |
* Warning: sprintf/sscanf are not ASync safe. They were used for |
193 |
* convenience. |
194 |
* |
195 |
* 'nm' is used because it is most widespread |
196 |
* GNU: nm [-B] |
197 |
* Solaris: nm -x -p |
198 |
* IRIX: nm -x -B (but __builtin_return_address() always returns NULL) |
199 |
* AIX: nm -x -B |
200 |
* OSF/1: nm -B |
201 |
* SCO/OpenServer: nm -x -p |
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* HP/UX nm -x -p |
203 |
*/ |
204 |
|
205 |
#if defined(__GNUC__) && defined(USE_BUILTIN) |
206 |
|
207 |
typedef struct { |
208 |
unsigned long realAddress; |
209 |
unsigned long closestAddress; |
210 |
char name[MAX_BUFFER_SIZE + 1]; |
211 |
char type; |
212 |
} address_T; |
213 |
|
214 |
|
215 |
static void GCC_DumpStack(void) |
216 |
{ |
217 |
int i; |
218 |
void *p = &p; /* dummy start value */ |
219 |
address_T syms[ADDRESSLIST_SIZE + 1]; |
220 |
char buffer[MAX_BUFFER_SIZE]; |
221 |
int fd; |
222 |
pid_t pid; |
223 |
unsigned long addr; |
224 |
unsigned long highestAddress; |
225 |
unsigned long lowestAddress; |
226 |
char type; |
227 |
char *pname; |
228 |
char name[MAX_BUFFER_SIZE]; |
229 |
int number; |
230 |
|
231 |
for (i = 0; p; i++) |
232 |
{ |
233 |
/* |
234 |
* This is based on code by Steve Coleman <steve.colemanjhuapl.edu> |
235 |
* |
236 |
* __builtin_return_address() only accepts a constant as argument. |
237 |
*/ |
238 |
switch (i) |
239 |
{ |
240 |
case 0: |
241 |
p = __builtin_return_address(0); |
242 |
break; |
243 |
case 1: |
244 |
p = __builtin_return_address(1); |
245 |
break; |
246 |
case 2: |
247 |
p = __builtin_return_address(2); |
248 |
break; |
249 |
case 3: |
250 |
p = __builtin_return_address(3); |
251 |
break; |
252 |
case 4: |
253 |
p = __builtin_return_address(4); |
254 |
break; |
255 |
case 5: |
256 |
p = __builtin_return_address(5); |
257 |
break; |
258 |
case 6: |
259 |
p = __builtin_return_address(6); |
260 |
break; |
261 |
case 7: |
262 |
p = __builtin_return_address(7); |
263 |
break; |
264 |
case 8: |
265 |
p = __builtin_return_address(8); |
266 |
break; |
267 |
case 9: |
268 |
p = __builtin_return_address(9); |
269 |
break; |
270 |
case 10: |
271 |
p = __builtin_return_address(10); |
272 |
break; |
273 |
case 11: |
274 |
p = __builtin_return_address(11); |
275 |
break; |
276 |
case 12: |
277 |
p = __builtin_return_address(12); |
278 |
break; |
279 |
case 13: |
280 |
p = __builtin_return_address(13); |
281 |
break; |
282 |
case 14: |
283 |
p = __builtin_return_address(14); |
284 |
break; |
285 |
case 15: |
286 |
p = __builtin_return_address(15); |
287 |
break; |
288 |
case 16: |
289 |
p = __builtin_return_address(16); |
290 |
break; |
291 |
case 17: |
292 |
p = __builtin_return_address(17); |
293 |
break; |
294 |
case 18: |
295 |
p = __builtin_return_address(18); |
296 |
break; |
297 |
case 19: |
298 |
p = __builtin_return_address(19); |
299 |
break; |
300 |
default: |
301 |
/* Change ADDRESSLIST_SIZE if more are added */ |
302 |
p = NULL; |
303 |
break; |
304 |
} |
305 |
if ((p) && (i < ADDRESSLIST_SIZE)) |
306 |
{ |
307 |
syms[i].realAddress = (unsigned long)p; |
308 |
syms[i].closestAddress = 0; |
309 |
syms[i].name[0] = (char)0; |
310 |
syms[i].type = ' '; |
311 |
} |
312 |
else |
313 |
{ |
314 |
syms[i].realAddress = 0; |
315 |
break; /* for */ |
316 |
} |
317 |
} /* for */ |
318 |
|
319 |
|
320 |
/* First find out if we are using GNU or vendor nm */ |
321 |
number = 0; |
322 |
strcpy(buffer, "nm -V 2>/dev/null | grep GNU | wc -l"); |
323 |
fd = my_popen(buffer, &pid); |
324 |
if (SYS_ERROR != fd) |
325 |
{ |
326 |
if (my_getline(fd, buffer, sizeof(buffer))) |
327 |
{ |
328 |
sscanf(buffer, "%d", &number); |
329 |
} |
330 |
my_pclose(fd, pid); |
331 |
} |
332 |
if (number == 0) /* vendor nm */ |
333 |
{ |
334 |
# if defined(PLATFORM_SOLARIS) || defined(PLATFORM_SCO) || defined(PLATFORM_HPUX) |
335 |
strcpy(buffer, "nm -x -p "); |
336 |
# elif defined(PLATFORM_AIX) || defined(PLATFORM_IRIX) || defined(PLATFORM_OSF) |
337 |
strcpy(buffer, "nm -x -B "); |
338 |
# else |
339 |
strcpy(buffer, "nm -B "); |
340 |
# endif |
341 |
} |
342 |
else /* GNU nm */ |
343 |
strcpy(buffer, "nm -B "); |
344 |
strcat(buffer, global_progname); |
345 |
|
346 |
lowestAddress = ULONG_MAX; |
347 |
highestAddress = 0; |
348 |
fd = my_popen(buffer, &pid); |
349 |
if (SYS_ERROR != fd) |
350 |
{ |
351 |
while (my_getline(fd, buffer, sizeof(buffer))) |
352 |
{ |
353 |
if (buffer[0] == '\n') |
354 |
continue; |
355 |
if (3 == sscanf(buffer, "%lx %c %s", &addr, &type, name)) |
356 |
{ |
357 |
if ((type == 't') || type == 'T') |
358 |
{ |
359 |
if (addr == 0) |
360 |
continue; /* while */ |
361 |
if (addr < lowestAddress) |
362 |
lowestAddress = addr; |
363 |
if (addr > highestAddress) |
364 |
highestAddress = addr; |
365 |
for (i = 0; syms[i].realAddress != 0; i++) |
366 |
{ |
367 |
if ((addr <= syms[i].realAddress) && |
368 |
(addr > syms[i].closestAddress)) |
369 |
{ |
370 |
syms[i].closestAddress = addr; |
371 |
strncpy(syms[i].name, name, MAX_BUFFER_SIZE); |
372 |
syms[i].name[MAX_BUFFER_SIZE] = (char)0; |
373 |
syms[i].type = type; |
374 |
} |
375 |
} |
376 |
} |
377 |
} |
378 |
} |
379 |
my_pclose(fd, pid); |
380 |
|
381 |
for (i = 0; syms[i].realAddress != 0; i++) |
382 |
{ |
383 |
if ((syms[i].name[0] == (char)0) || |
384 |
(syms[i].realAddress <= lowestAddress) || |
385 |
(syms[i].realAddress >= highestAddress)) |
386 |
{ |
387 |
sprintf(buffer, "[%d] 0x%08lx ???\n", i, syms[i].realAddress); |
388 |
} |
389 |
else |
390 |
{ |
391 |
sprintf(buffer, "[%d] 0x%08lx <%s + 0x%lx> %c\n", |
392 |
i, |
393 |
syms[i].realAddress, |
394 |
syms[i].name, |
395 |
syms[i].realAddress - syms[i].closestAddress, |
396 |
syms[i].type); |
397 |
} |
398 |
write(global_output, buffer, strlen(buffer)); |
399 |
} |
400 |
} |
401 |
} |
402 |
#endif |
403 |
|
404 |
/************************************************************************* |
405 |
* DumpStack [private] |
406 |
*/ |
407 |
static int DumpStack(char *format, ...) |
408 |
{ |
409 |
int gotSomething = FALSE; |
410 |
int fd; |
411 |
pid_t pid; |
412 |
int status = EXIT_FAILURE; |
413 |
int rc; |
414 |
va_list args; |
415 |
char *buffer; |
416 |
char cmd[MAX_BUFFER_SIZE]; |
417 |
char buf[MAX_BUFFER_SIZE]; |
418 |
|
419 |
/* |
420 |
* Please note that vsprintf() is not ASync safe (ie. cannot safely |
421 |
* be used from a signal handler.) If this proves to be a problem |
422 |
* then the cmd string can be built by more basic functions such as |
423 |
* strcpy, strcat, and a homemade integer-to-ascii function. |
424 |
*/ |
425 |
va_start(args, format); |
426 |
vsprintf(cmd, format, args); |
427 |
va_end(args); |
428 |
|
429 |
fd = my_popen(cmd, &pid); |
430 |
if (SYS_ERROR != fd) |
431 |
{ |
432 |
/* |
433 |
* Wait for the child to exit. This must be done |
434 |
* to make the debugger attach successfully. |
435 |
* The output from the debugger is buffered on |
436 |
* the pipe. |
437 |
* |
438 |
* AIX needs the looping hack |
439 |
*/ |
440 |
do |
441 |
{ |
442 |
rc = waitpid(pid, &status, 0); |
443 |
} |
444 |
while ((SYS_ERROR == rc) && (EINTR == errno)); |
445 |
|
446 |
if ((WIFEXITED(status)) && (WEXITSTATUS(status) == EXIT_SUCCESS)) |
447 |
{ |
448 |
while (my_getline(fd, buf, sizeof(buf))) |
449 |
{ |
450 |
buffer = buf; |
451 |
if (! gotSomething) |
452 |
{ |
453 |
write(global_output, "Output from ", |
454 |
strlen("Output from ")); |
455 |
strtok(cmd, " "); |
456 |
write(global_output, cmd, strlen(cmd)); |
457 |
write(global_output, "\n", strlen("\n")); |
458 |
gotSomething = TRUE; |
459 |
} |
460 |
if ('\n' == buf[strlen(buf)-1]) |
461 |
{ |
462 |
buf[strlen(buf)-1] = (char)0; |
463 |
} |
464 |
write(global_output, buffer, strlen(buffer)); |
465 |
write(global_output, "\n", strlen("\n")); |
466 |
} |
467 |
} |
468 |
my_pclose(fd, pid); |
469 |
} |
470 |
return gotSomething; |
471 |
} |
472 |
#endif /* PLATFORM_UNIX */ |
473 |
|
474 |
/************************************************************************* |
475 |
* StackTrace |
476 |
*/ |
477 |
void StackTrace(void) |
478 |
{ |
479 |
#if defined(PLATFORM_UNIX) |
480 |
/* |
481 |
* In general dbx seems to do a better job than gdb. |
482 |
* |
483 |
* Different dbx implementations require different flags/commands. |
484 |
*/ |
485 |
|
486 |
# if defined(PLATFORM_AIX) |
487 |
|
488 |
if (DumpStack("dbx -a %d 2>/dev/null <<EOF\n" |
489 |
"where\n" |
490 |
"detach\n" |
491 |
"EOF\n", |
492 |
(int)getpid())) |
493 |
return; |
494 |
|
495 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
496 |
"set prompt\n" |
497 |
"where\n" |
498 |
"detach\n" |
499 |
"quit\n" |
500 |
"EOF\n", |
501 |
global_progname, (int)getpid())) |
502 |
return; |
503 |
|
504 |
# elif defined(PLATFORM_FREEBSD) |
505 |
|
506 |
/* |
507 |
* FreeBSD insists on sending a SIGSTOP to the process we |
508 |
* attach to, so we let the debugger send a SIGCONT to that |
509 |
* process after we have detached. |
510 |
*/ |
511 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
512 |
"set prompt\n" |
513 |
"where\n" |
514 |
"detach\n" |
515 |
"shell kill -CONT %d\n" |
516 |
"quit\n" |
517 |
"EOF\n", |
518 |
global_progname, (int)getpid(), (int)getpid())) |
519 |
return; |
520 |
|
521 |
# elif defined(PLATFORM_HPUX) |
522 |
|
523 |
/* |
524 |
* HP decided to call their debugger xdb. |
525 |
* |
526 |
* This does not seem to work properly yet. The debugger says |
527 |
* "Note: Stack traces may not be possible until you are |
528 |
* stopped in user code." on HP-UX 09.01 |
529 |
* |
530 |
* -L = line-oriented interface. |
531 |
* "T [depth]" gives a stacktrace with local variables. |
532 |
* The final "y" is confirmation to the quit command. |
533 |
*/ |
534 |
|
535 |
if (DumpStack("xdb -P %d -L %s 2>&1 <<EOF\n" |
536 |
"T 50\n" |
537 |
"q\ny\n" |
538 |
"EOF\n", |
539 |
(int)getpid(), global_progname)) |
540 |
return; |
541 |
|
542 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
543 |
"set prompt\n" |
544 |
"where\n" |
545 |
"detach\n" |
546 |
"quit\n" |
547 |
"EOF\n", |
548 |
global_progname, (int)getpid())) |
549 |
return; |
550 |
|
551 |
# if defined(PLATFORM_HPUX) && defined(USE_BUILTIN) |
552 |
U_STACK_TRACE(); |
553 |
return; |
554 |
# endif |
555 |
|
556 |
# elif defined(PLATFORM_IRIX) |
557 |
|
558 |
/* |
559 |
* "set $page=0" drops hold mode |
560 |
* "dump ." displays the contents of the variables |
561 |
*/ |
562 |
if (DumpStack("dbx -p %d 2>/dev/null <<EOF\n" |
563 |
"set \\$page=0\n" |
564 |
"where\n" |
565 |
# if !defined(__GNUC__) |
566 |
/* gcc does not generate this information */ |
567 |
"dump .\n" |
568 |
# endif |
569 |
"detach\n" |
570 |
"EOF\n", |
571 |
(int)getpid())) |
572 |
return; |
573 |
|
574 |
# if defined(USE_BUILTIN) |
575 |
if (trace_back_stack_and_print()) |
576 |
return; |
577 |
# endif |
578 |
|
579 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
580 |
"set prompt\n" |
581 |
"echo --- Stacktrace\\n\n" |
582 |
"where\n" |
583 |
"echo --- Symbols\\n\n" |
584 |
"frame 5\n" /* Skip signal handler frames */ |
585 |
"set \\$x = 50\n" |
586 |
"while (\\$x)\n" /* Print local variables for each frame */ |
587 |
"info locals\n" |
588 |
"up\n" |
589 |
"set \\$x--\n" |
590 |
"end\n" |
591 |
"echo ---\\n\n" |
592 |
"detach\n" |
593 |
"quit\n" |
594 |
"EOF\n", |
595 |
global_progname, (int)getpid())) |
596 |
return; |
597 |
|
598 |
# elif defined(PLATFORM_OSF) |
599 |
|
600 |
if (DumpStack("dbx -pid %d %s 2>/dev/null <<EOF\n" |
601 |
"where\n" |
602 |
"detach\n" |
603 |
"quit\n" |
604 |
"EOF\n", |
605 |
(int)getpid(), global_progname)) |
606 |
return; |
607 |
|
608 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
609 |
"set prompt\n" |
610 |
"where\n" |
611 |
"detach\n" |
612 |
"quit\n" |
613 |
"EOF\n", |
614 |
global_progname, (int)getpid())) |
615 |
return; |
616 |
|
617 |
# elif defined(PLATFORM_SCO) |
618 |
|
619 |
/* |
620 |
* SCO OpenServer dbx is like a catch-22. The 'detach' command |
621 |
* depends on whether ptrace(S) support detaching or not. If it |
622 |
* is supported then 'detach' must be used, otherwise the process |
623 |
* will be killed upon dbx exit. If it isn't supported then 'detach' |
624 |
* will cause the process to be killed. We do not want it to be |
625 |
* killed. |
626 |
* |
627 |
* Out of two evils, the omission of 'detach' was chosen because |
628 |
* it worked on our system. |
629 |
*/ |
630 |
if (DumpStack("dbx %s %d 2>/dev/null <<EOF\n" |
631 |
"where\n" |
632 |
"quit\nEOF\n", |
633 |
global_progname, (int)getpid())) |
634 |
return; |
635 |
|
636 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
637 |
"set prompt\n" |
638 |
"where\n" |
639 |
"detach\n" |
640 |
"quit\n" |
641 |
"EOF\n", |
642 |
global_progname, (int)getpid())) |
643 |
return; |
644 |
|
645 |
# elif defined(PLATFORM_SOLARIS) |
646 |
|
647 |
if (DumpStack("dbx %s %d 2>/dev/null <<EOF\n" |
648 |
"where\n" |
649 |
"detach\n" |
650 |
"EOF\n", |
651 |
global_progname, (int)getpid())) |
652 |
return; |
653 |
|
654 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
655 |
"set prompt\n" |
656 |
"echo --- Stacktrace\\n\n" |
657 |
"where\n" |
658 |
"echo --- Symbols\\n\n" |
659 |
"frame 5\n" /* Skip signal handler frames */ |
660 |
"set \\$x = 50\n" |
661 |
"while (\\$x)\n" /* Print local variables for each frame */ |
662 |
"info locals\n" |
663 |
"up\n" |
664 |
"set \\$x--\n" |
665 |
"end\n" |
666 |
"echo ---\\n\n" |
667 |
"detach\n" |
668 |
"quit\n" |
669 |
"EOF\n", |
670 |
global_progname, (int)getpid())) |
671 |
return; |
672 |
|
673 |
if (DumpStack("/usr/proc/bin/pstack %d", |
674 |
(int)getpid())) |
675 |
return; |
676 |
|
677 |
/* |
678 |
* Other Unices (AIX, HPUX, SCO) also have adb, but |
679 |
* they seem unable to attach to a running process. |
680 |
*/ |
681 |
if (DumpStack("adb %s 2>&1 <<EOF\n" |
682 |
"0t%d:A\n" /* Attach to pid */ |
683 |
"\\$c\n" /* print stacktrace */ |
684 |
":R\n" /* Detach */ |
685 |
"\\$q\n" /* Quit */ |
686 |
"EOF\n", |
687 |
global_progname, (int)getpid())) |
688 |
return; |
689 |
|
690 |
# else /* All other Unix platforms */ |
691 |
|
692 |
/* |
693 |
* TODO: SCO/UnixWare 7 must be something like (not tested) |
694 |
* debug -i c <pid> <<EOF\nstack -f 4\nquit\nEOF\n |
695 |
*/ |
696 |
|
697 |
# if !defined(__GNUC__) |
698 |
if (DumpStack("dbx %s %d 2>/dev/null <<EOF\n" |
699 |
"where\n" |
700 |
"detach\n" |
701 |
"EOF\n", |
702 |
global_progname, (int)getpid())) |
703 |
return; |
704 |
# endif |
705 |
|
706 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
707 |
"set prompt\n" |
708 |
"echo --- Stacktrace\\n\n" |
709 |
"where\n" |
710 |
"echo --- Symbols\\n\n" |
711 |
"frame 4\n" |
712 |
"set \\$x = 50\n" |
713 |
"while (\\$x)\n" /* Print local variables for each frame */ |
714 |
"info locals\n" |
715 |
"up\n" |
716 |
"set \\$x--\n" |
717 |
"end\n" |
718 |
"echo ---\\n\n" |
719 |
"detach\n" |
720 |
"quit\n" |
721 |
"EOF\n", |
722 |
global_progname, (int)getpid())) |
723 |
return; |
724 |
|
725 |
# endif |
726 |
|
727 |
# if defined(__GNUC__) && defined(USE_BUILTIN) |
728 |
|
729 |
GCC_DumpStack(); |
730 |
|
731 |
# endif |
732 |
|
733 |
write(global_output, |
734 |
"No debugger found\n", strlen("No debugger found\n")); |
735 |
|
736 |
#elif defined(PLATFORM_WIN32) |
737 |
/* Use StackWalk() */ |
738 |
#endif |
739 |
} |
740 |
|
741 |
/************************************************************************* |
742 |
* StackTraceInit |
743 |
*/ |
744 |
void StackTraceInit(const char *in_name, int in_handle) |
745 |
{ |
746 |
global_progname = in_name; |
747 |
global_output = (in_handle == -1) ? STDOUT_FILENO : in_handle; |
748 |
} |
749 |
|
750 |
|
751 |
/************************************************************************* |
752 |
* test |
753 |
*/ |
754 |
#if defined(STANDALONE) |
755 |
|
756 |
void CrashHandler(int sig) |
757 |
{ |
758 |
/* Reinstall default handler to prevent race conditions */ |
759 |
signal(sig, SIG_DFL); |
760 |
/* Print the stack trace */ |
761 |
StackTrace(); |
762 |
/* And exit because we may have corrupted the internal |
763 |
* memory allocation lists. Use abort() if we want to |
764 |
* generate a core dump. */ |
765 |
_exit(EXIT_FAILURE); |
766 |
} |
767 |
|
768 |
|
769 |
void Crash(void) |
770 |
{ |
771 |
/* Force a crash */ |
772 |
strcpy(NULL, ""); |
773 |
} |
774 |
|
775 |
int main(int argc, char *argv[]) |
776 |
{ |
777 |
struct sigaction sact; |
778 |
|
779 |
StackTraceInit(argv[0], -1); |
780 |
|
781 |
sigemptyset(&sact.sa_mask); |
782 |
sact.sa_flags = 0; |
783 |
sact.sa_handler = CrashHandler; |
784 |
sigaction(SIGSEGV, &sact, NULL); |
785 |
sigaction(SIGBUS, &sact, NULL); |
786 |
|
787 |
Crash(); |
788 |
return EXIT_SUCCESS; |
789 |
} |
790 |
#endif |