| 1 |
/************************************************************************* |
| 2 |
* |
| 3 |
* $Id: stacktrace.c,v 1.2 2005-02-09 01:22:17 schoenebeck Exp $ |
| 4 |
* |
| 5 |
* 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 |
| 13 |
* 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 |
| 19 |
* - Cleaned up the interface |
| 20 |
* |
| 21 |
* 1999/08/06 - breese |
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* - Added U_STACK_TRACE for HP/UX |
| 23 |
* |
| 24 |
* 1999/01/24 - breese |
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* - Added GCC_DumpStack |
| 26 |
* |
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* 1998/12/21 - breese |
| 28 |
* - Fixed include files and arguments for waitpid() |
| 29 |
* - Made an AIX workaround for waitpid() exiting with EINTR |
| 30 |
* - Added a missing 'quit' command for OSF dbx |
| 31 |
* |
| 32 |
************************************************************************/ |
| 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__) |
| 54 |
# 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 |
#include <unistd.h> |
| 67 |
#if defined(PLATFORM_UNIX) |
| 68 |
# include <unistd.h> |
| 69 |
# include <sys/types.h> |
| 70 |
# include <sys/wait.h> |
| 71 |
# if defined(PLATFORM_IRIX) && defined(USE_BUILTIN) |
| 72 |
/* Compile with -DUSE_BUILTIN and -lexc */ |
| 73 |
# include <libexc.h> |
| 74 |
# elif defined(PLATFORM_HPUX) && defined(USE_BUILTIN) |
| 75 |
/* Compile with -DUSE_BUILTIN and -lcl */ |
| 76 |
extern void U_STACK_TRACE(void); |
| 77 |
# endif |
| 78 |
#endif |
| 79 |
|
| 80 |
#include "stacktrace.h" |
| 81 |
|
| 82 |
#ifndef FALSE |
| 83 |
# define FALSE (0 == 1) |
| 84 |
# define TRUE (! FALSE) |
| 85 |
#endif |
| 86 |
|
| 87 |
#define SYS_ERROR -1 |
| 88 |
|
| 89 |
#ifndef EXIT_SUCCESS |
| 90 |
# define EXIT_SUCCESS 0 |
| 91 |
#endif |
| 92 |
#ifndef EXIT_FAILURE |
| 93 |
# define EXIT_FAILURE 1 |
| 94 |
#endif |
| 95 |
|
| 96 |
#define MAX_BUFFER_SIZE 512 |
| 97 |
#if defined(__GNUC__) |
| 98 |
/* Change the code if ADDRESSLIST_SIZE is increased */ |
| 99 |
# define ADDRESSLIST_SIZE 20 |
| 100 |
#endif |
| 101 |
|
| 102 |
/************************************************************************* |
| 103 |
* Globals |
| 104 |
* |
| 105 |
* We cannot pass custom arguments to signal handlers so we store |
| 106 |
* them as global variables (but limit their scope to this file.) |
| 107 |
*/ |
| 108 |
static const char *global_progname; |
| 109 |
static int global_output = STDOUT_FILENO; |
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|
| 111 |
|
| 112 |
#if defined(PLATFORM_UNIX) |
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/************************************************************************* |
| 114 |
* my_pclose [private] |
| 115 |
*/ |
| 116 |
static void my_pclose(int fd, int pid) |
| 117 |
{ |
| 118 |
close(fd); |
| 119 |
/* Make sure the the child process has terminated */ |
| 120 |
(void)kill(pid, SIGTERM); |
| 121 |
} |
| 122 |
|
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/************************************************************************* |
| 124 |
* my_popen [private] |
| 125 |
*/ |
| 126 |
static int my_popen(const char *command, pid_t *pid) |
| 127 |
{ |
| 128 |
int rc; |
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//int pipefd[2]; |
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|
| 131 |
//FIXME: deactivated separate piping of debugger output, as it caused problems in conjunction with threads |
| 132 |
//rc = pipe(pipefd); |
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rc = SYS_ERROR; |
| 134 |
//if (SYS_ERROR != rc) |
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{ |
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*pid = fork(); |
| 137 |
switch (*pid) |
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{ |
| 139 |
case SYS_ERROR: |
| 140 |
//rc = SYS_ERROR; |
| 141 |
//close(pipefd[0]); |
| 142 |
//close(pipefd[1]); |
| 143 |
break; |
| 144 |
|
| 145 |
case 0: /* Child */ |
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//close(pipefd[0]); |
| 147 |
//close(STDOUT_FILENO); |
| 148 |
//close(STDERR_FILENO); |
| 149 |
//dup2(pipefd[1], STDOUT_FILENO); |
| 150 |
//dup2(pipefd[1], STDERR_FILENO); |
| 151 |
/* |
| 152 |
* The System() call assumes that /bin/sh is |
| 153 |
* always available, and so will we. |
| 154 |
*/ |
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execl("/bin/sh", "/bin/sh", "-c", command, NULL); |
| 156 |
_exit(EXIT_FAILURE); |
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break; |
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|
| 159 |
default: /* Parent */ |
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//close(pipefd[1]); |
| 161 |
//rc = pipefd[0]; |
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break; |
| 163 |
} /* switch */ |
| 164 |
} |
| 165 |
return rc; |
| 166 |
} |
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|
| 168 |
/************************************************************************* |
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* my_getline [private] |
| 170 |
*/ |
| 171 |
static int my_getline(int fd, char *buffer, int max) |
| 172 |
{ |
| 173 |
char c; |
| 174 |
int i = 0; |
| 175 |
|
| 176 |
do { |
| 177 |
if (read(fd, &c, 1) < 1) |
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return 0; |
| 179 |
if (i < max) |
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buffer[i++] = c; |
| 181 |
} while (c != '\n'); |
| 182 |
buffer[i] = (char)0; |
| 183 |
return i; |
| 184 |
} |
| 185 |
|
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/************************************************************************* |
| 187 |
* GCC_DumpStack [private] |
| 188 |
* |
| 189 |
* |
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* This code is still experimental. |
| 191 |
* |
| 192 |
* Stackbased arrays are used to prevent allocating from the heap. |
| 193 |
* Warning: sprintf/sscanf are not ASync safe. They were used for |
| 194 |
* convenience. |
| 195 |
* |
| 196 |
* 'nm' is used because it is most widespread |
| 197 |
* GNU: nm [-B] |
| 198 |
* Solaris: nm -x -p |
| 199 |
* IRIX: nm -x -B (but __builtin_return_address() always returns NULL) |
| 200 |
* AIX: nm -x -B |
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* OSF/1: nm -B |
| 202 |
* SCO/OpenServer: nm -x -p |
| 203 |
* HP/UX nm -x -p |
| 204 |
*/ |
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|
| 206 |
#if defined(__GNUC__) && defined(USE_BUILTIN) |
| 207 |
|
| 208 |
typedef struct { |
| 209 |
unsigned long realAddress; |
| 210 |
unsigned long closestAddress; |
| 211 |
char name[MAX_BUFFER_SIZE + 1]; |
| 212 |
char type; |
| 213 |
} address_T; |
| 214 |
|
| 215 |
|
| 216 |
static void GCC_DumpStack(void) |
| 217 |
{ |
| 218 |
int i; |
| 219 |
void *p = &p; /* dummy start value */ |
| 220 |
address_T syms[ADDRESSLIST_SIZE + 1]; |
| 221 |
char buffer[MAX_BUFFER_SIZE]; |
| 222 |
int fd; |
| 223 |
pid_t pid; |
| 224 |
unsigned long addr; |
| 225 |
unsigned long highestAddress; |
| 226 |
unsigned long lowestAddress; |
| 227 |
char type; |
| 228 |
char *pname; |
| 229 |
char name[MAX_BUFFER_SIZE]; |
| 230 |
int number; |
| 231 |
|
| 232 |
for (i = 0; p; i++) |
| 233 |
{ |
| 234 |
/* |
| 235 |
* This is based on code by Steve Coleman <steve.colemanjhuapl.edu> |
| 236 |
* |
| 237 |
* __builtin_return_address() only accepts a constant as argument. |
| 238 |
*/ |
| 239 |
switch (i) |
| 240 |
{ |
| 241 |
case 0: |
| 242 |
p = __builtin_return_address(0); |
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break; |
| 244 |
case 1: |
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p = __builtin_return_address(1); |
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break; |
| 247 |
case 2: |
| 248 |
p = __builtin_return_address(2); |
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break; |
| 250 |
case 3: |
| 251 |
p = __builtin_return_address(3); |
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break; |
| 253 |
case 4: |
| 254 |
p = __builtin_return_address(4); |
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break; |
| 256 |
case 5: |
| 257 |
p = __builtin_return_address(5); |
| 258 |
break; |
| 259 |
case 6: |
| 260 |
p = __builtin_return_address(6); |
| 261 |
break; |
| 262 |
case 7: |
| 263 |
p = __builtin_return_address(7); |
| 264 |
break; |
| 265 |
case 8: |
| 266 |
p = __builtin_return_address(8); |
| 267 |
break; |
| 268 |
case 9: |
| 269 |
p = __builtin_return_address(9); |
| 270 |
break; |
| 271 |
case 10: |
| 272 |
p = __builtin_return_address(10); |
| 273 |
break; |
| 274 |
case 11: |
| 275 |
p = __builtin_return_address(11); |
| 276 |
break; |
| 277 |
case 12: |
| 278 |
p = __builtin_return_address(12); |
| 279 |
break; |
| 280 |
case 13: |
| 281 |
p = __builtin_return_address(13); |
| 282 |
break; |
| 283 |
case 14: |
| 284 |
p = __builtin_return_address(14); |
| 285 |
break; |
| 286 |
case 15: |
| 287 |
p = __builtin_return_address(15); |
| 288 |
break; |
| 289 |
case 16: |
| 290 |
p = __builtin_return_address(16); |
| 291 |
break; |
| 292 |
case 17: |
| 293 |
p = __builtin_return_address(17); |
| 294 |
break; |
| 295 |
case 18: |
| 296 |
p = __builtin_return_address(18); |
| 297 |
break; |
| 298 |
case 19: |
| 299 |
p = __builtin_return_address(19); |
| 300 |
break; |
| 301 |
default: |
| 302 |
/* Change ADDRESSLIST_SIZE if more are added */ |
| 303 |
p = NULL; |
| 304 |
break; |
| 305 |
} |
| 306 |
if ((p) && (i < ADDRESSLIST_SIZE)) |
| 307 |
{ |
| 308 |
syms[i].realAddress = (unsigned long)p; |
| 309 |
syms[i].closestAddress = 0; |
| 310 |
syms[i].name[0] = (char)0; |
| 311 |
syms[i].type = ' '; |
| 312 |
} |
| 313 |
else |
| 314 |
{ |
| 315 |
syms[i].realAddress = 0; |
| 316 |
break; /* for */ |
| 317 |
} |
| 318 |
} /* for */ |
| 319 |
|
| 320 |
|
| 321 |
/* First find out if we are using GNU or vendor nm */ |
| 322 |
number = 0; |
| 323 |
strcpy(buffer, "nm -V 2>/dev/null | grep GNU | wc -l"); |
| 324 |
fd = my_popen(buffer, &pid); |
| 325 |
if (SYS_ERROR != fd) |
| 326 |
{ |
| 327 |
if (my_getline(fd, buffer, sizeof(buffer))) |
| 328 |
{ |
| 329 |
sscanf(buffer, "%d", &number); |
| 330 |
} |
| 331 |
my_pclose(fd, pid); |
| 332 |
} |
| 333 |
if (number == 0) /* vendor nm */ |
| 334 |
{ |
| 335 |
# if defined(PLATFORM_SOLARIS) || defined(PLATFORM_SCO) || defined(PLATFORM_HPUX) |
| 336 |
strcpy(buffer, "nm -x -p "); |
| 337 |
# elif defined(PLATFORM_AIX) || defined(PLATFORM_IRIX) || defined(PLATFORM_OSF) |
| 338 |
strcpy(buffer, "nm -x -B "); |
| 339 |
# else |
| 340 |
strcpy(buffer, "nm -B "); |
| 341 |
# endif |
| 342 |
} |
| 343 |
else /* GNU nm */ |
| 344 |
strcpy(buffer, "nm -B "); |
| 345 |
strcat(buffer, global_progname); |
| 346 |
|
| 347 |
lowestAddress = ULONG_MAX; |
| 348 |
highestAddress = 0; |
| 349 |
fd = my_popen(buffer, &pid); |
| 350 |
if (SYS_ERROR != fd) |
| 351 |
{ |
| 352 |
while (my_getline(fd, buffer, sizeof(buffer))) |
| 353 |
{ |
| 354 |
if (buffer[0] == '\n') |
| 355 |
continue; |
| 356 |
if (3 == sscanf(buffer, "%lx %c %s", &addr, &type, name)) |
| 357 |
{ |
| 358 |
if ((type == 't') || type == 'T') |
| 359 |
{ |
| 360 |
if (addr == 0) |
| 361 |
continue; /* while */ |
| 362 |
if (addr < lowestAddress) |
| 363 |
lowestAddress = addr; |
| 364 |
if (addr > highestAddress) |
| 365 |
highestAddress = addr; |
| 366 |
for (i = 0; syms[i].realAddress != 0; i++) |
| 367 |
{ |
| 368 |
if ((addr <= syms[i].realAddress) && |
| 369 |
(addr > syms[i].closestAddress)) |
| 370 |
{ |
| 371 |
syms[i].closestAddress = addr; |
| 372 |
strncpy(syms[i].name, name, MAX_BUFFER_SIZE); |
| 373 |
syms[i].name[MAX_BUFFER_SIZE] = (char)0; |
| 374 |
syms[i].type = type; |
| 375 |
} |
| 376 |
} |
| 377 |
} |
| 378 |
} |
| 379 |
} |
| 380 |
my_pclose(fd, pid); |
| 381 |
|
| 382 |
for (i = 0; syms[i].realAddress != 0; i++) |
| 383 |
{ |
| 384 |
if ((syms[i].name[0] == (char)0) || |
| 385 |
(syms[i].realAddress <= lowestAddress) || |
| 386 |
(syms[i].realAddress >= highestAddress)) |
| 387 |
{ |
| 388 |
sprintf(buffer, "[%d] 0x%08lx ???\n", i, syms[i].realAddress); |
| 389 |
} |
| 390 |
else |
| 391 |
{ |
| 392 |
sprintf(buffer, "[%d] 0x%08lx <%s + 0x%lx> %c\n", |
| 393 |
i, |
| 394 |
syms[i].realAddress, |
| 395 |
syms[i].name, |
| 396 |
syms[i].realAddress - syms[i].closestAddress, |
| 397 |
syms[i].type); |
| 398 |
} |
| 399 |
write(global_output, buffer, strlen(buffer)); |
| 400 |
} |
| 401 |
} |
| 402 |
} |
| 403 |
#endif |
| 404 |
|
| 405 |
/************************************************************************* |
| 406 |
* DumpStack [private] |
| 407 |
*/ |
| 408 |
static int DumpStack(char *format, ...) |
| 409 |
{ |
| 410 |
int gotSomething = FALSE; |
| 411 |
int fd; |
| 412 |
pid_t pid; |
| 413 |
int status = EXIT_FAILURE; |
| 414 |
int rc; |
| 415 |
va_list args; |
| 416 |
char *buffer; |
| 417 |
char cmd[MAX_BUFFER_SIZE]; |
| 418 |
char buf[MAX_BUFFER_SIZE]; |
| 419 |
|
| 420 |
/* |
| 421 |
* Please note that vsprintf() is not ASync safe (ie. cannot safely |
| 422 |
* be used from a signal handler.) If this proves to be a problem |
| 423 |
* then the cmd string can be built by more basic functions such as |
| 424 |
* strcpy, strcat, and a homemade integer-to-ascii function. |
| 425 |
*/ |
| 426 |
va_start(args, format); |
| 427 |
vsprintf(cmd, format, args); |
| 428 |
va_end(args); |
| 429 |
|
| 430 |
fd = my_popen(cmd, &pid); |
| 431 |
if (SYS_ERROR != fd) |
| 432 |
{ |
| 433 |
/* |
| 434 |
* Wait for the child to exit. This must be done |
| 435 |
* to make the debugger attach successfully. |
| 436 |
* The output from the debugger is buffered on |
| 437 |
* the pipe. |
| 438 |
* |
| 439 |
* AIX needs the looping hack |
| 440 |
*/ |
| 441 |
do |
| 442 |
{ |
| 443 |
rc = waitpid(pid, &status, 0); |
| 444 |
} |
| 445 |
while ((SYS_ERROR == rc) && (EINTR == errno)); |
| 446 |
|
| 447 |
if ((WIFEXITED(status)) && (WEXITSTATUS(status) == EXIT_SUCCESS)) |
| 448 |
{ |
| 449 |
while (my_getline(fd, buf, sizeof(buf))) |
| 450 |
{ |
| 451 |
buffer = buf; |
| 452 |
if (! gotSomething) |
| 453 |
{ |
| 454 |
write(global_output, "Output from ", |
| 455 |
strlen("Output from ")); |
| 456 |
strtok(cmd, " "); |
| 457 |
write(global_output, cmd, strlen(cmd)); |
| 458 |
write(global_output, "\n", strlen("\n")); |
| 459 |
gotSomething = TRUE; |
| 460 |
} |
| 461 |
if ('\n' == buf[strlen(buf)-1]) |
| 462 |
{ |
| 463 |
buf[strlen(buf)-1] = (char)0; |
| 464 |
} |
| 465 |
write(global_output, buffer, strlen(buffer)); |
| 466 |
write(global_output, "\n", strlen("\n")); |
| 467 |
} |
| 468 |
} |
| 469 |
my_pclose(fd, pid); |
| 470 |
} |
| 471 |
return gotSomething; |
| 472 |
} |
| 473 |
#endif /* PLATFORM_UNIX */ |
| 474 |
|
| 475 |
/************************************************************************* |
| 476 |
* StackTrace |
| 477 |
*/ |
| 478 |
void StackTrace(void) |
| 479 |
{ |
| 480 |
#if defined(PLATFORM_UNIX) |
| 481 |
/* |
| 482 |
* In general dbx seems to do a better job than gdb. |
| 483 |
* |
| 484 |
* Different dbx implementations require different flags/commands. |
| 485 |
*/ |
| 486 |
|
| 487 |
# if defined(PLATFORM_AIX) |
| 488 |
|
| 489 |
if (DumpStack("dbx -a %d 2>/dev/null <<EOF\n" |
| 490 |
"where\n" |
| 491 |
"detach\n" |
| 492 |
"EOF\n", |
| 493 |
(int)getpid())) |
| 494 |
return; |
| 495 |
|
| 496 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
| 497 |
"set prompt\n" |
| 498 |
"where\n" |
| 499 |
"detach\n" |
| 500 |
"quit\n" |
| 501 |
"EOF\n", |
| 502 |
global_progname, (int)getpid())) |
| 503 |
return; |
| 504 |
|
| 505 |
# elif defined(PLATFORM_FREEBSD) |
| 506 |
|
| 507 |
/* |
| 508 |
* FreeBSD insists on sending a SIGSTOP to the process we |
| 509 |
* attach to, so we let the debugger send a SIGCONT to that |
| 510 |
* process after we have detached. |
| 511 |
*/ |
| 512 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
| 513 |
"set prompt\n" |
| 514 |
"where\n" |
| 515 |
"detach\n" |
| 516 |
"shell kill -CONT %d\n" |
| 517 |
"quit\n" |
| 518 |
"EOF\n", |
| 519 |
global_progname, (int)getpid(), (int)getpid())) |
| 520 |
return; |
| 521 |
|
| 522 |
# elif defined(PLATFORM_HPUX) |
| 523 |
|
| 524 |
/* |
| 525 |
* HP decided to call their debugger xdb. |
| 526 |
* |
| 527 |
* This does not seem to work properly yet. The debugger says |
| 528 |
* "Note: Stack traces may not be possible until you are |
| 529 |
* stopped in user code." on HP-UX 09.01 |
| 530 |
* |
| 531 |
* -L = line-oriented interface. |
| 532 |
* "T [depth]" gives a stacktrace with local variables. |
| 533 |
* The final "y" is confirmation to the quit command. |
| 534 |
*/ |
| 535 |
|
| 536 |
if (DumpStack("xdb -P %d -L %s 2>&1 <<EOF\n" |
| 537 |
"T 50\n" |
| 538 |
"q\ny\n" |
| 539 |
"EOF\n", |
| 540 |
(int)getpid(), global_progname)) |
| 541 |
return; |
| 542 |
|
| 543 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
| 544 |
"set prompt\n" |
| 545 |
"where\n" |
| 546 |
"detach\n" |
| 547 |
"quit\n" |
| 548 |
"EOF\n", |
| 549 |
global_progname, (int)getpid())) |
| 550 |
return; |
| 551 |
|
| 552 |
# if defined(PLATFORM_HPUX) && defined(USE_BUILTIN) |
| 553 |
U_STACK_TRACE(); |
| 554 |
return; |
| 555 |
# endif |
| 556 |
|
| 557 |
# elif defined(PLATFORM_IRIX) |
| 558 |
|
| 559 |
/* |
| 560 |
* "set $page=0" drops hold mode |
| 561 |
* "dump ." displays the contents of the variables |
| 562 |
*/ |
| 563 |
if (DumpStack("dbx -p %d 2>/dev/null <<EOF\n" |
| 564 |
"set \\$page=0\n" |
| 565 |
"where\n" |
| 566 |
# if !defined(__GNUC__) |
| 567 |
/* gcc does not generate this information */ |
| 568 |
"dump .\n" |
| 569 |
# endif |
| 570 |
"detach\n" |
| 571 |
"EOF\n", |
| 572 |
(int)getpid())) |
| 573 |
return; |
| 574 |
|
| 575 |
# if defined(USE_BUILTIN) |
| 576 |
if (trace_back_stack_and_print()) |
| 577 |
return; |
| 578 |
# endif |
| 579 |
|
| 580 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
| 581 |
"set prompt\n" |
| 582 |
"echo --- Stacktrace\\n\n" |
| 583 |
"where\n" |
| 584 |
"echo --- Symbols\\n\n" |
| 585 |
"frame 5\n" /* Skip signal handler frames */ |
| 586 |
"set \\$x = 50\n" |
| 587 |
"while (\\$x)\n" /* Print local variables for each frame */ |
| 588 |
"info locals\n" |
| 589 |
"up\n" |
| 590 |
"set \\$x--\n" |
| 591 |
"end\n" |
| 592 |
"echo ---\\n\n" |
| 593 |
"detach\n" |
| 594 |
"quit\n" |
| 595 |
"EOF\n", |
| 596 |
global_progname, (int)getpid())) |
| 597 |
return; |
| 598 |
|
| 599 |
# elif defined(PLATFORM_OSF) |
| 600 |
|
| 601 |
if (DumpStack("dbx -pid %d %s 2>/dev/null <<EOF\n" |
| 602 |
"where\n" |
| 603 |
"detach\n" |
| 604 |
"quit\n" |
| 605 |
"EOF\n", |
| 606 |
(int)getpid(), global_progname)) |
| 607 |
return; |
| 608 |
|
| 609 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
| 610 |
"set prompt\n" |
| 611 |
"where\n" |
| 612 |
"detach\n" |
| 613 |
"quit\n" |
| 614 |
"EOF\n", |
| 615 |
global_progname, (int)getpid())) |
| 616 |
return; |
| 617 |
|
| 618 |
# elif defined(PLATFORM_SCO) |
| 619 |
|
| 620 |
/* |
| 621 |
* SCO OpenServer dbx is like a catch-22. The 'detach' command |
| 622 |
* depends on whether ptrace(S) support detaching or not. If it |
| 623 |
* is supported then 'detach' must be used, otherwise the process |
| 624 |
* will be killed upon dbx exit. If it isn't supported then 'detach' |
| 625 |
* will cause the process to be killed. We do not want it to be |
| 626 |
* killed. |
| 627 |
* |
| 628 |
* Out of two evils, the omission of 'detach' was chosen because |
| 629 |
* it worked on our system. |
| 630 |
*/ |
| 631 |
if (DumpStack("dbx %s %d 2>/dev/null <<EOF\n" |
| 632 |
"where\n" |
| 633 |
"quit\nEOF\n", |
| 634 |
global_progname, (int)getpid())) |
| 635 |
return; |
| 636 |
|
| 637 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
| 638 |
"set prompt\n" |
| 639 |
"where\n" |
| 640 |
"detach\n" |
| 641 |
"quit\n" |
| 642 |
"EOF\n", |
| 643 |
global_progname, (int)getpid())) |
| 644 |
return; |
| 645 |
|
| 646 |
# elif defined(PLATFORM_SOLARIS) |
| 647 |
|
| 648 |
if (DumpStack("dbx %s %d 2>/dev/null <<EOF\n" |
| 649 |
"where\n" |
| 650 |
"detach\n" |
| 651 |
"EOF\n", |
| 652 |
global_progname, (int)getpid())) |
| 653 |
return; |
| 654 |
|
| 655 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
| 656 |
"set prompt\n" |
| 657 |
"echo --- Stacktrace\\n\n" |
| 658 |
"where\n" |
| 659 |
"echo --- Symbols\\n\n" |
| 660 |
"frame 5\n" /* Skip signal handler frames */ |
| 661 |
"set \\$x = 50\n" |
| 662 |
"while (\\$x)\n" /* Print local variables for each frame */ |
| 663 |
"info locals\n" |
| 664 |
"up\n" |
| 665 |
"set \\$x--\n" |
| 666 |
"end\n" |
| 667 |
"echo ---\\n\n" |
| 668 |
"detach\n" |
| 669 |
"quit\n" |
| 670 |
"EOF\n", |
| 671 |
global_progname, (int)getpid())) |
| 672 |
return; |
| 673 |
|
| 674 |
if (DumpStack("/usr/proc/bin/pstack %d", |
| 675 |
(int)getpid())) |
| 676 |
return; |
| 677 |
|
| 678 |
/* |
| 679 |
* Other Unices (AIX, HPUX, SCO) also have adb, but |
| 680 |
* they seem unable to attach to a running process. |
| 681 |
*/ |
| 682 |
if (DumpStack("adb %s 2>&1 <<EOF\n" |
| 683 |
"0t%d:A\n" /* Attach to pid */ |
| 684 |
"\\$c\n" /* print stacktrace */ |
| 685 |
":R\n" /* Detach */ |
| 686 |
"\\$q\n" /* Quit */ |
| 687 |
"EOF\n", |
| 688 |
global_progname, (int)getpid())) |
| 689 |
return; |
| 690 |
|
| 691 |
# else /* All other Unix platforms */ |
| 692 |
|
| 693 |
/* |
| 694 |
* TODO: SCO/UnixWare 7 must be something like (not tested) |
| 695 |
* debug -i c <pid> <<EOF\nstack -f 4\nquit\nEOF\n |
| 696 |
*/ |
| 697 |
|
| 698 |
# if !defined(__GNUC__) |
| 699 |
if (DumpStack("dbx %s %d 2>/dev/null <<EOF\n" |
| 700 |
"where\n" |
| 701 |
"detach\n" |
| 702 |
"EOF\n", |
| 703 |
global_progname, (int)getpid())) |
| 704 |
return; |
| 705 |
# endif |
| 706 |
|
| 707 |
if (DumpStack("gdb -q %s %d 2>/dev/null <<EOF\n" |
| 708 |
"set prompt\n" |
| 709 |
"echo --- Stacktrace\\n\n" |
| 710 |
"where\n" |
| 711 |
"echo --- Symbols\\n\n" |
| 712 |
"frame 4\n" |
| 713 |
"set \\$x = 50\n" |
| 714 |
"while (\\$x)\n" /* Print local variables for each frame */ |
| 715 |
"info locals\n" |
| 716 |
"up\n" |
| 717 |
"set \\$x--\n" |
| 718 |
"end\n" |
| 719 |
"echo ---\\n\n" |
| 720 |
"detach\n" |
| 721 |
"quit\n" |
| 722 |
"EOF\n", |
| 723 |
global_progname, (int)getpid())) |
| 724 |
return; |
| 725 |
|
| 726 |
# endif |
| 727 |
|
| 728 |
# if defined(__GNUC__) && defined(USE_BUILTIN) |
| 729 |
|
| 730 |
GCC_DumpStack(); |
| 731 |
|
| 732 |
# endif |
| 733 |
|
| 734 |
write(global_output, |
| 735 |
"No debugger found\n", strlen("No debugger found\n")); |
| 736 |
|
| 737 |
#elif defined(PLATFORM_WIN32) |
| 738 |
/* Use StackWalk() */ |
| 739 |
#endif |
| 740 |
} |
| 741 |
|
| 742 |
/************************************************************************* |
| 743 |
* StackTraceInit |
| 744 |
*/ |
| 745 |
void StackTraceInit(const char *in_name, int in_handle) |
| 746 |
{ |
| 747 |
global_progname = in_name; |
| 748 |
global_output = (in_handle == -1) ? STDOUT_FILENO : in_handle; |
| 749 |
} |
| 750 |
|
| 751 |
|
| 752 |
/************************************************************************* |
| 753 |
* test |
| 754 |
*/ |
| 755 |
#if defined(STANDALONE) |
| 756 |
|
| 757 |
void CrashHandler(int sig) |
| 758 |
{ |
| 759 |
/* Reinstall default handler to prevent race conditions */ |
| 760 |
signal(sig, SIG_DFL); |
| 761 |
/* Print the stack trace */ |
| 762 |
StackTrace(); |
| 763 |
/* And exit because we may have corrupted the internal |
| 764 |
* memory allocation lists. Use abort() if we want to |
| 765 |
* generate a core dump. */ |
| 766 |
_exit(EXIT_FAILURE); |
| 767 |
} |
| 768 |
|
| 769 |
|
| 770 |
void Crash(void) |
| 771 |
{ |
| 772 |
/* Force a crash */ |
| 773 |
strcpy(NULL, ""); |
| 774 |
} |
| 775 |
|
| 776 |
int main(int argc, char *argv[]) |
| 777 |
{ |
| 778 |
struct sigaction sact; |
| 779 |
|
| 780 |
StackTraceInit(argv[0], -1); |
| 781 |
|
| 782 |
sigemptyset(&sact.sa_mask); |
| 783 |
sact.sa_flags = 0; |
| 784 |
sact.sa_handler = CrashHandler; |
| 785 |
sigaction(SIGSEGV, &sact, NULL); |
| 786 |
sigaction(SIGBUS, &sact, NULL); |
| 787 |
|
| 788 |
Crash(); |
| 789 |
return EXIT_SUCCESS; |
| 790 |
} |
| 791 |
#endif |
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