Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl> |
| 3 | * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl> |
| 4 | * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com> |
Wichert Akkerman | 4dc8a2a | 1999-12-23 14:20:14 +0000 | [diff] [blame] | 5 | * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl> |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. The name of the author may not be used to endorse or promote products |
| 17 | * derived from this software without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | * |
| 30 | * $Id$ |
| 31 | */ |
| 32 | |
Wichert Akkerman | 2ee6e45 | 2000-02-18 15:36:12 +0000 | [diff] [blame] | 33 | #include <sys/types.h> |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 34 | #include "defs.h" |
| 35 | |
| 36 | #include <signal.h> |
| 37 | #include <errno.h> |
| 38 | #include <sys/param.h> |
| 39 | #include <fcntl.h> |
| 40 | #include <sys/resource.h> |
| 41 | #include <sys/wait.h> |
| 42 | #include <sys/stat.h> |
| 43 | #include <pwd.h> |
| 44 | #include <grp.h> |
| 45 | #include <string.h> |
| 46 | |
Wichert Akkerman | 7b3346b | 2001-10-09 23:47:38 +0000 | [diff] [blame^] | 47 | #if defined(IA64) && defined(LINUX) |
| 48 | # include <asm/ptrace_offsets.h> |
| 49 | #endif |
| 50 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 51 | #ifdef USE_PROCFS |
| 52 | #include <poll.h> |
| 53 | #endif |
| 54 | |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 55 | #ifdef SVR4 |
| 56 | #include <sys/stropts.h> |
Wichert Akkerman | ea78f0f | 1999-11-29 15:34:02 +0000 | [diff] [blame] | 57 | #ifdef HAVE_MP_PROCFS |
John Hughes | 1d08dcf | 2001-07-10 13:48:44 +0000 | [diff] [blame] | 58 | #ifdef HAVE_SYS_UIO_H |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 59 | #include <sys/uio.h> |
| 60 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 61 | #endif |
John Hughes | 1d08dcf | 2001-07-10 13:48:44 +0000 | [diff] [blame] | 62 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 63 | |
| 64 | int debug = 0, followfork = 0, followvfork = 0, interactive = 0; |
| 65 | int rflag = 0, tflag = 0, dtime = 0, cflag = 0; |
| 66 | int iflag = 0, xflag = 0, qflag = 0; |
| 67 | int pflag_seen = 0; |
| 68 | |
| 69 | char *username = NULL; |
| 70 | uid_t run_uid; |
| 71 | gid_t run_gid; |
| 72 | |
| 73 | int acolumn = DEFAULT_ACOLUMN; |
| 74 | int max_strlen = DEFAULT_STRLEN; |
| 75 | char *outfname = NULL; |
| 76 | FILE *outf; |
| 77 | struct tcb tcbtab[MAX_PROCS]; |
| 78 | int nprocs; |
| 79 | char *progname; |
| 80 | extern char version[]; |
| 81 | extern char **environ; |
| 82 | |
| 83 | static struct tcb *pid2tcb P((int pid)); |
| 84 | static int trace P((void)); |
| 85 | static void cleanup P((void)); |
| 86 | static void interrupt P((int sig)); |
| 87 | static sigset_t empty_set, blocked_set; |
| 88 | |
| 89 | #ifdef HAVE_SIG_ATOMIC_T |
| 90 | static volatile sig_atomic_t interrupted; |
| 91 | #else /* !HAVE_SIG_ATOMIC_T */ |
| 92 | #ifdef __STDC__ |
| 93 | static volatile int interrupted; |
| 94 | #else /* !__STDC__ */ |
| 95 | static int interrupted; |
| 96 | #endif /* !__STDC__ */ |
| 97 | #endif /* !HAVE_SIG_ATOMIC_T */ |
| 98 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 99 | #ifdef USE_PROCFS |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 100 | |
| 101 | static struct tcb *pfd2tcb P((int pfd)); |
| 102 | static void reaper P((int sig)); |
| 103 | static void rebuild_pollv P((void)); |
Wichert Akkerman | e68d61c | 1999-06-28 13:17:16 +0000 | [diff] [blame] | 104 | struct pollfd pollv[MAX_PROCS]; |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 105 | |
| 106 | #ifndef HAVE_POLLABLE_PROCFS |
| 107 | |
| 108 | static void proc_poll_open P((void)); |
| 109 | static void proc_poller P((int pfd)); |
| 110 | |
| 111 | struct proc_pollfd { |
| 112 | int fd; |
| 113 | int revents; |
| 114 | int pid; |
| 115 | }; |
| 116 | |
| 117 | static int poller_pid; |
| 118 | static int proc_poll_pipe[2] = { -1, -1 }; |
| 119 | |
| 120 | #endif /* !HAVE_POLLABLE_PROCFS */ |
| 121 | |
Wichert Akkerman | ea78f0f | 1999-11-29 15:34:02 +0000 | [diff] [blame] | 122 | #ifdef HAVE_MP_PROCFS |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 123 | #define POLLWANT POLLWRNORM |
| 124 | #else |
| 125 | #define POLLWANT POLLPRI |
| 126 | #endif |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 127 | #endif /* USE_PROCFS */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 128 | |
| 129 | static void |
| 130 | usage(ofp, exitval) |
| 131 | FILE *ofp; |
| 132 | int exitval; |
| 133 | { |
| 134 | fprintf(ofp, "\ |
| 135 | usage: strace [-dffhiqrtttTvVxx] [-a column] [-e expr] ... [-o file]\n\ |
| 136 | [-p pid] ... [-s strsize] [-u username] [command [arg ...]]\n\ |
| 137 | or: strace -c [-e expr] ... [-O overhead] [-S sortby] [command [arg ...]]\n\ |
| 138 | -c -- count time, calls, and errors for each syscall and report summary\n\ |
| 139 | -f -- follow forks, -ff -- with output into separate files\n\ |
| 140 | -F -- attempt to follow vforks, -h -- print help message\n\ |
| 141 | -i -- print instruction pointer at time of syscall\n\ |
| 142 | -q -- suppress messages about attaching, detaching, etc.\n\ |
| 143 | -r -- print relative timestamp, -t -- absolute timestamp, -tt -- with usecs\n\ |
| 144 | -T -- print time spent in each syscall, -V -- print version\n\ |
| 145 | -v -- verbose mode: print unabbreviated argv, stat, termio[s], etc. args\n\ |
| 146 | -x -- print non-ascii strings in hex, -xx -- print all strings in hex\n\ |
| 147 | -a column -- alignment COLUMN for printing syscall results (default %d)\n\ |
| 148 | -e expr -- a qualifying expression: option=[!]all or option=[!]val1[,val2]...\n\ |
| 149 | options: trace, abbrev, verbose, raw, signal, read, or write\n\ |
| 150 | -o file -- send trace output to FILE instead of stderr\n\ |
| 151 | -O overhead -- set overhead for tracing syscalls to OVERHEAD usecs\n\ |
| 152 | -p pid -- trace process with process id PID, may be repeated\n\ |
| 153 | -s strsize -- limit length of print strings to STRSIZE chars (default %d)\n\ |
| 154 | -S sortby -- sort syscall counts by: time, calls, name, nothing (default %s)\n\ |
| 155 | -u username -- run command as username handling setuid and/or setgid\n\ |
| 156 | ", DEFAULT_ACOLUMN, DEFAULT_STRLEN, DEFAULT_SORTBY); |
| 157 | exit(exitval); |
| 158 | } |
| 159 | |
| 160 | #ifdef SVR4 |
| 161 | #ifdef MIPS |
| 162 | void |
| 163 | foobar() |
| 164 | { |
| 165 | } |
| 166 | #endif /* MIPS */ |
| 167 | #endif /* SVR4 */ |
| 168 | |
| 169 | int |
| 170 | main(argc, argv) |
| 171 | int argc; |
| 172 | char *argv[]; |
| 173 | { |
| 174 | extern int optind; |
| 175 | extern char *optarg; |
| 176 | struct tcb *tcp; |
| 177 | int c, pid = 0; |
| 178 | struct sigaction sa; |
| 179 | |
| 180 | static char buf[BUFSIZ]; |
| 181 | |
| 182 | progname = argv[0]; |
| 183 | outf = stderr; |
| 184 | interactive = 1; |
| 185 | qualify("trace=all"); |
| 186 | qualify("abbrev=all"); |
| 187 | qualify("verbose=all"); |
| 188 | qualify("signal=all"); |
| 189 | set_sortby(DEFAULT_SORTBY); |
| 190 | set_personality(DEFAULT_PERSONALITY); |
| 191 | while ((c = getopt(argc, argv, |
| 192 | "+cdfFhiqrtTvVxa:e:o:O:p:s:S:u:")) != EOF) { |
| 193 | switch (c) { |
| 194 | case 'c': |
| 195 | cflag++; |
| 196 | dtime++; |
| 197 | break; |
| 198 | case 'd': |
| 199 | debug++; |
| 200 | break; |
| 201 | case 'f': |
| 202 | followfork++; |
| 203 | break; |
| 204 | case 'F': |
| 205 | followvfork++; |
| 206 | break; |
| 207 | case 'h': |
| 208 | usage(stdout, 0); |
| 209 | break; |
| 210 | case 'i': |
| 211 | iflag++; |
| 212 | break; |
| 213 | case 'q': |
| 214 | qflag++; |
| 215 | break; |
| 216 | case 'r': |
| 217 | rflag++; |
| 218 | tflag++; |
| 219 | break; |
| 220 | case 't': |
| 221 | tflag++; |
| 222 | break; |
| 223 | case 'T': |
| 224 | dtime++; |
| 225 | break; |
| 226 | case 'x': |
| 227 | xflag++; |
| 228 | break; |
| 229 | case 'v': |
| 230 | qualify("abbrev=none"); |
| 231 | break; |
| 232 | case 'V': |
| 233 | printf("%s\n", version); |
| 234 | exit(0); |
| 235 | break; |
| 236 | case 'a': |
| 237 | acolumn = atoi(optarg); |
| 238 | break; |
| 239 | case 'e': |
| 240 | qualify(optarg); |
| 241 | break; |
| 242 | case 'o': |
| 243 | outfname = strdup(optarg); |
| 244 | break; |
| 245 | case 'O': |
| 246 | set_overhead(atoi(optarg)); |
| 247 | break; |
| 248 | case 'p': |
| 249 | if ((pid = atoi(optarg)) == 0) { |
| 250 | fprintf(stderr, "%s: Invalid process id: %s\n", |
| 251 | progname, optarg); |
| 252 | break; |
| 253 | } |
| 254 | if (pid == getpid()) { |
Wichert Akkerman | 54a4767 | 1999-10-17 00:57:34 +0000 | [diff] [blame] | 255 | fprintf(stderr, "%s: I'm sorry, I can't let you do that, Dave.\n", progname); |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 256 | break; |
| 257 | } |
| 258 | if ((tcp = alloctcb(pid)) == NULL) { |
| 259 | fprintf(stderr, "%s: tcb table full, please recompile strace\n", |
| 260 | progname); |
| 261 | exit(1); |
| 262 | } |
| 263 | tcp->flags |= TCB_ATTACHED; |
| 264 | pflag_seen++; |
| 265 | break; |
| 266 | case 's': |
| 267 | max_strlen = atoi(optarg); |
| 268 | break; |
| 269 | case 'S': |
| 270 | set_sortby(optarg); |
| 271 | break; |
| 272 | case 'u': |
| 273 | username = strdup(optarg); |
| 274 | break; |
| 275 | default: |
| 276 | usage(stderr, 1); |
| 277 | break; |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | /* See if they want to run as another user. */ |
| 282 | if (username != NULL) { |
| 283 | struct passwd *pent; |
| 284 | |
| 285 | if (getuid() != 0 || geteuid() != 0) { |
| 286 | fprintf(stderr, |
| 287 | "%s: you must be root to use the -u option\n", |
| 288 | progname); |
| 289 | exit(1); |
| 290 | } |
| 291 | if ((pent = getpwnam(username)) == NULL) { |
| 292 | fprintf(stderr, "%s: cannot find user `%s'\n", |
| 293 | progname, optarg); |
| 294 | exit(1); |
| 295 | } |
| 296 | run_uid = pent->pw_uid; |
| 297 | run_gid = pent->pw_gid; |
| 298 | } |
| 299 | else { |
| 300 | run_uid = getuid(); |
| 301 | run_gid = getgid(); |
| 302 | } |
| 303 | |
| 304 | #ifndef SVR4 |
| 305 | setreuid(geteuid(), getuid()); |
| 306 | #endif |
| 307 | |
| 308 | /* See if they want to pipe the output. */ |
| 309 | if (outfname && (outfname[0] == '|' || outfname[0] == '!')) { |
| 310 | if ((outf = popen(outfname + 1, "w")) == NULL) { |
| 311 | fprintf(stderr, "%s: can't popen '%s': %s\n", |
| 312 | progname, outfname + 1, strerror(errno)); |
| 313 | exit(1); |
| 314 | } |
| 315 | free(outfname); |
| 316 | outfname = NULL; |
| 317 | } |
| 318 | |
| 319 | /* Check if they want to redirect the output. */ |
| 320 | if (outfname) { |
Wichert Akkerman | 54b4f79 | 2001-08-03 11:43:35 +0000 | [diff] [blame] | 321 | long f; |
| 322 | |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 323 | if ((outf = fopen(outfname, "w")) == NULL) { |
| 324 | fprintf(stderr, "%s: can't fopen '%s': %s\n", |
| 325 | progname, outfname, strerror(errno)); |
| 326 | exit(1); |
| 327 | } |
Wichert Akkerman | 54b4f79 | 2001-08-03 11:43:35 +0000 | [diff] [blame] | 328 | |
| 329 | if ((f=fcntl(fileno(outf), F_GETFD)) < 0 ) { |
| 330 | perror("failed to get flags for outputfile"); |
| 331 | exit(1); |
| 332 | } |
| 333 | |
| 334 | if (fcntl(fileno(outf), F_SETFD, f|FD_CLOEXEC) < 0 ) { |
| 335 | perror("failed to set flags for outputfile"); |
| 336 | exit(1); |
| 337 | } |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | #ifndef SVR4 |
| 341 | setreuid(geteuid(), getuid()); |
| 342 | #endif |
| 343 | |
| 344 | if (!outfname) { |
| 345 | qflag = 1; |
| 346 | setvbuf(outf, buf, _IOLBF, BUFSIZ); |
| 347 | } |
| 348 | else if (optind < argc) |
| 349 | interactive = 0; |
| 350 | else |
| 351 | qflag = 1; |
| 352 | |
| 353 | for (c = 0, tcp = tcbtab; c < MAX_PROCS; c++, tcp++) { |
| 354 | /* Reinitialize the output since it may have changed. */ |
| 355 | tcp->outf = outf; |
| 356 | if (!(tcp->flags & TCB_INUSE) || !(tcp->flags & TCB_ATTACHED)) |
| 357 | continue; |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 358 | #ifdef USE_PROCFS |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 359 | if (proc_open(tcp, 1) < 0) { |
| 360 | fprintf(stderr, "trouble opening proc file\n"); |
| 361 | droptcb(tcp); |
| 362 | continue; |
| 363 | } |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 364 | #else /* !USE_PROCFS */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 365 | if (ptrace(PTRACE_ATTACH, tcp->pid, (char *) 1, 0) < 0) { |
| 366 | perror("attach: ptrace(PTRACE_ATTACH, ...)"); |
| 367 | droptcb(tcp); |
| 368 | continue; |
| 369 | } |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 370 | #endif /* !USE_PROCFS */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 371 | if (!qflag) |
| 372 | fprintf(stderr, |
| 373 | "Process %u attached - interrupt to quit\n", |
| 374 | pid); |
| 375 | } |
| 376 | |
| 377 | if (optind < argc) { |
| 378 | struct stat statbuf; |
| 379 | char *filename; |
| 380 | char pathname[MAXPATHLEN]; |
| 381 | |
| 382 | filename = argv[optind]; |
| 383 | if (strchr(filename, '/')) |
| 384 | strcpy(pathname, filename); |
| 385 | #ifdef USE_DEBUGGING_EXEC |
| 386 | /* |
| 387 | * Debuggers customarily check the current directory |
| 388 | * first regardless of the path but doing that gives |
| 389 | * security geeks a panic attack. |
| 390 | */ |
| 391 | else if (stat(filename, &statbuf) == 0) |
| 392 | strcpy(pathname, filename); |
| 393 | #endif /* USE_DEBUGGING_EXEC */ |
| 394 | else { |
| 395 | char *path; |
| 396 | int m, n, len; |
| 397 | |
| 398 | for (path = getenv("PATH"); path && *path; path += m) { |
| 399 | if (strchr(path, ':')) { |
| 400 | n = strchr(path, ':') - path; |
| 401 | m = n + 1; |
| 402 | } |
| 403 | else |
| 404 | m = n = strlen(path); |
| 405 | if (n == 0) { |
| 406 | getcwd(pathname, MAXPATHLEN); |
| 407 | len = strlen(pathname); |
| 408 | } |
| 409 | else { |
| 410 | strncpy(pathname, path, n); |
| 411 | len = n; |
| 412 | } |
| 413 | if (len && pathname[len - 1] != '/') |
| 414 | pathname[len++] = '/'; |
| 415 | strcpy(pathname + len, filename); |
| 416 | if (stat(pathname, &statbuf) == 0) |
| 417 | break; |
| 418 | } |
| 419 | } |
| 420 | if (stat(pathname, &statbuf) < 0) { |
| 421 | fprintf(stderr, "%s: %s: command not found\n", |
| 422 | progname, filename); |
| 423 | exit(1); |
| 424 | } |
| 425 | switch (pid = fork()) { |
| 426 | case -1: |
| 427 | perror("strace: fork"); |
| 428 | cleanup(); |
| 429 | exit(1); |
| 430 | break; |
| 431 | case 0: { |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 432 | #ifdef USE_PROCFS |
| 433 | if (outf != stderr) close (fileno (outf)); |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 434 | #ifdef MIPS |
| 435 | /* Kludge for SGI, see proc_open for details. */ |
| 436 | sa.sa_handler = foobar; |
| 437 | sa.sa_flags = 0; |
| 438 | sigemptyset(&sa.sa_mask); |
| 439 | sigaction(SIGINT, &sa, NULL); |
| 440 | #endif /* MIPS */ |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 441 | #ifndef FREEBSD |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 442 | pause(); |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 443 | #else /* FREEBSD */ |
| 444 | kill(getpid(), SIGSTOP); /* stop HERE */ |
| 445 | #endif /* FREEBSD */ |
| 446 | #else /* !USE_PROCFS */ |
Wichert Akkerman | bd4125c | 2000-06-27 17:28:06 +0000 | [diff] [blame] | 447 | if (outf!=stderr) |
Wichert Akkerman | 7987cdf | 2000-07-05 16:05:39 +0000 | [diff] [blame] | 448 | close(fileno (outf)); |
Wichert Akkerman | bd4125c | 2000-06-27 17:28:06 +0000 | [diff] [blame] | 449 | |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 450 | if (ptrace(PTRACE_TRACEME, 0, (char *) 1, 0) < 0) { |
| 451 | perror("strace: ptrace(PTRACE_TRACEME, ...)"); |
| 452 | return -1; |
| 453 | } |
| 454 | if (debug) |
| 455 | kill(getpid(), SIGSTOP); |
| 456 | |
| 457 | if (username != NULL || geteuid() == 0) { |
| 458 | uid_t run_euid = run_uid; |
| 459 | gid_t run_egid = run_gid; |
| 460 | |
| 461 | if (statbuf.st_mode & S_ISUID) |
| 462 | run_euid = statbuf.st_uid; |
| 463 | if (statbuf.st_mode & S_ISGID) |
| 464 | run_egid = statbuf.st_gid; |
| 465 | |
| 466 | /* |
| 467 | * It is important to set groups before we |
| 468 | * lose privileges on setuid. |
| 469 | */ |
Wichert Akkerman | 5ae21ea | 2000-05-01 01:53:59 +0000 | [diff] [blame] | 470 | if (username != NULL) { |
| 471 | if (initgroups(username, run_gid) < 0) { |
| 472 | perror("initgroups"); |
| 473 | exit(1); |
| 474 | } |
| 475 | if (setregid(run_gid, run_egid) < 0) { |
| 476 | perror("setregid"); |
| 477 | exit(1); |
| 478 | } |
| 479 | if (setreuid(run_uid, run_euid) < 0) { |
| 480 | perror("setreuid"); |
| 481 | exit(1); |
| 482 | } |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 483 | } |
| 484 | } |
| 485 | else |
| 486 | setreuid(run_uid, run_uid); |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 487 | #endif /* !USE_PROCFS */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 488 | |
| 489 | execv(pathname, &argv[optind]); |
| 490 | perror("strace: exec"); |
| 491 | _exit(1); |
| 492 | break; |
| 493 | } |
| 494 | default: |
| 495 | if ((tcp = alloctcb(pid)) == NULL) { |
| 496 | fprintf(stderr, "tcb table full\n"); |
| 497 | cleanup(); |
| 498 | exit(1); |
| 499 | } |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 500 | #ifdef USE_PROCFS |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 501 | if (proc_open(tcp, 0) < 0) { |
| 502 | fprintf(stderr, "trouble opening proc file\n"); |
| 503 | cleanup(); |
| 504 | exit(1); |
| 505 | } |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 506 | #endif /* USE_PROCFS */ |
| 507 | #ifndef USE_PROCFS |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 508 | fake_execve(tcp, pathname, &argv[optind], environ); |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 509 | #endif /* !USE_PROCFS */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 510 | break; |
| 511 | } |
| 512 | } |
| 513 | else if (pflag_seen == 0) |
| 514 | usage(stderr, 1); |
| 515 | |
| 516 | sigemptyset(&empty_set); |
| 517 | sigemptyset(&blocked_set); |
| 518 | sa.sa_handler = SIG_IGN; |
| 519 | sigemptyset(&sa.sa_mask); |
| 520 | sa.sa_flags = 0; |
| 521 | sigaction(SIGTTOU, &sa, NULL); |
| 522 | sigaction(SIGTTIN, &sa, NULL); |
| 523 | if (interactive) { |
| 524 | sigaddset(&blocked_set, SIGHUP); |
| 525 | sigaddset(&blocked_set, SIGINT); |
| 526 | sigaddset(&blocked_set, SIGQUIT); |
| 527 | sigaddset(&blocked_set, SIGPIPE); |
| 528 | sigaddset(&blocked_set, SIGTERM); |
| 529 | sa.sa_handler = interrupt; |
| 530 | #ifdef SUNOS4 |
| 531 | /* POSIX signals on sunos4.1 are a little broken. */ |
| 532 | sa.sa_flags = SA_INTERRUPT; |
| 533 | #endif /* SUNOS4 */ |
| 534 | } |
| 535 | sigaction(SIGHUP, &sa, NULL); |
| 536 | sigaction(SIGINT, &sa, NULL); |
| 537 | sigaction(SIGQUIT, &sa, NULL); |
| 538 | sigaction(SIGPIPE, &sa, NULL); |
| 539 | sigaction(SIGTERM, &sa, NULL); |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 540 | #ifdef USE_PROCFS |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 541 | sa.sa_handler = reaper; |
| 542 | sigaction(SIGCHLD, &sa, NULL); |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 543 | #endif /* USE_PROCFS */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 544 | |
| 545 | if (trace() < 0) |
| 546 | exit(1); |
| 547 | cleanup(); |
| 548 | exit(0); |
| 549 | } |
| 550 | |
| 551 | void |
| 552 | newoutf(tcp) |
| 553 | struct tcb *tcp; |
| 554 | { |
| 555 | char name[MAXPATHLEN]; |
| 556 | FILE *fp; |
| 557 | |
| 558 | if (outfname && followfork > 1) { |
| 559 | sprintf(name, "%s.%u", outfname, tcp->pid); |
| 560 | #ifndef SVR4 |
| 561 | setreuid(geteuid(), getuid()); |
| 562 | #endif |
| 563 | fp = fopen(name, "w"); |
| 564 | #ifndef SVR4 |
| 565 | setreuid(geteuid(), getuid()); |
| 566 | #endif |
| 567 | if (fp == NULL) { |
| 568 | perror("fopen"); |
| 569 | return; |
| 570 | } |
| 571 | tcp->outf = fp; |
| 572 | } |
| 573 | return; |
| 574 | } |
| 575 | |
| 576 | struct tcb * |
| 577 | alloctcb(pid) |
| 578 | int pid; |
| 579 | { |
| 580 | int i; |
| 581 | struct tcb *tcp; |
| 582 | |
| 583 | for (i = 0, tcp = tcbtab; i < MAX_PROCS; i++, tcp++) { |
| 584 | if ((tcp->flags & TCB_INUSE) == 0) { |
| 585 | tcp->pid = pid; |
| 586 | tcp->parent = NULL; |
| 587 | tcp->nchildren = 0; |
| 588 | tcp->flags = TCB_INUSE | TCB_STARTUP; |
| 589 | tcp->outf = outf; /* Initialise to current out file */ |
| 590 | tcp->stime.tv_sec = 0; |
| 591 | tcp->stime.tv_usec = 0; |
| 592 | tcp->pfd = -1; |
| 593 | nprocs++; |
| 594 | return tcp; |
| 595 | } |
| 596 | } |
| 597 | return NULL; |
| 598 | } |
| 599 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 600 | #ifdef USE_PROCFS |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 601 | int |
| 602 | proc_open(tcp, attaching) |
| 603 | struct tcb *tcp; |
| 604 | int attaching; |
| 605 | { |
| 606 | char proc[32]; |
| 607 | long arg; |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 608 | #ifdef SVR4 |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 609 | sysset_t sc_enter, sc_exit; |
| 610 | sigset_t signals; |
| 611 | fltset_t faults; |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 612 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 613 | #ifndef HAVE_POLLABLE_PROCFS |
| 614 | static int last_pfd; |
| 615 | #endif |
| 616 | |
Wichert Akkerman | ea78f0f | 1999-11-29 15:34:02 +0000 | [diff] [blame] | 617 | #ifdef HAVE_MP_PROCFS |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 618 | /* Open the process pseudo-files in /proc. */ |
| 619 | sprintf(proc, "/proc/%d/ctl", tcp->pid); |
| 620 | if ((tcp->pfd = open(proc, O_WRONLY|O_EXCL)) < 0) { |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 621 | perror("strace: open(\"/proc/...\", ...)"); |
| 622 | return -1; |
| 623 | } |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 624 | if ((arg = fcntl(tcp->pfd, F_GETFD)) < 0) { |
| 625 | perror("F_GETFD"); |
| 626 | return -1; |
| 627 | } |
| 628 | if (fcntl(tcp->pfd, F_SETFD, arg|FD_CLOEXEC) < 0) { |
| 629 | perror("F_SETFD"); |
| 630 | return -1; |
| 631 | } |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 632 | sprintf(proc, "/proc/%d/status", tcp->pid); |
| 633 | if ((tcp->pfd_stat = open(proc, O_RDONLY|O_EXCL)) < 0) { |
| 634 | perror("strace: open(\"/proc/...\", ...)"); |
| 635 | return -1; |
| 636 | } |
| 637 | if ((arg = fcntl(tcp->pfd_stat, F_GETFD)) < 0) { |
| 638 | perror("F_GETFD"); |
| 639 | return -1; |
| 640 | } |
| 641 | if (fcntl(tcp->pfd_stat, F_SETFD, arg|FD_CLOEXEC) < 0) { |
| 642 | perror("F_SETFD"); |
| 643 | return -1; |
| 644 | } |
| 645 | sprintf(proc, "/proc/%d/as", tcp->pid); |
| 646 | if ((tcp->pfd_as = open(proc, O_RDONLY|O_EXCL)) < 0) { |
| 647 | perror("strace: open(\"/proc/...\", ...)"); |
| 648 | return -1; |
| 649 | } |
| 650 | if ((arg = fcntl(tcp->pfd_as, F_GETFD)) < 0) { |
| 651 | perror("F_GETFD"); |
| 652 | return -1; |
| 653 | } |
| 654 | if (fcntl(tcp->pfd_as, F_SETFD, arg|FD_CLOEXEC) < 0) { |
| 655 | perror("F_SETFD"); |
| 656 | return -1; |
| 657 | } |
| 658 | #else |
| 659 | /* Open the process pseudo-file in /proc. */ |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 660 | #ifndef FREEBSD |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 661 | sprintf(proc, "/proc/%d", tcp->pid); |
| 662 | if ((tcp->pfd = open(proc, O_RDWR|O_EXCL)) < 0) { |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 663 | #else /* FREEBSD */ |
| 664 | sprintf(proc, "/proc/%d/mem", tcp->pid); |
| 665 | if ((tcp->pfd = open(proc, O_RDWR)) < 0) { |
| 666 | #endif /* FREEBSD */ |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 667 | perror("strace: open(\"/proc/...\", ...)"); |
| 668 | return -1; |
| 669 | } |
| 670 | if ((arg = fcntl(tcp->pfd, F_GETFD)) < 0) { |
| 671 | perror("F_GETFD"); |
| 672 | return -1; |
| 673 | } |
| 674 | if (fcntl(tcp->pfd, F_SETFD, arg|FD_CLOEXEC) < 0) { |
| 675 | perror("F_SETFD"); |
| 676 | return -1; |
| 677 | } |
| 678 | #endif |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 679 | #ifdef FREEBSD |
| 680 | sprintf(proc, "/proc/%d/regs", tcp->pid); |
| 681 | if ((tcp->pfd_reg = open(proc, O_RDONLY)) < 0) { |
| 682 | perror("strace: open(\"/proc/.../regs\", ...)"); |
| 683 | return -1; |
| 684 | } |
| 685 | if (cflag) { |
| 686 | sprintf(proc, "/proc/%d/status", tcp->pid); |
| 687 | if ((tcp->pfd_status = open(proc, O_RDONLY)) < 0) { |
| 688 | perror("strace: open(\"/proc/.../status\", ...)"); |
| 689 | return -1; |
| 690 | } |
| 691 | } else |
| 692 | tcp->pfd_status = -1; |
| 693 | #endif /* FREEBSD */ |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 694 | rebuild_pollv(); |
| 695 | if (!attaching) { |
| 696 | /* |
| 697 | * Wait for the child to pause. Because of a race |
| 698 | * condition we have to poll for the event. |
| 699 | */ |
| 700 | for (;;) { |
| 701 | if (IOCTL_STATUS (tcp) < 0) { |
| 702 | perror("strace: PIOCSTATUS"); |
| 703 | return -1; |
| 704 | } |
| 705 | if (tcp->status.PR_FLAGS & PR_ASLEEP) |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 706 | break; |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 707 | } |
| 708 | } |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 709 | #ifndef FREEBSD |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 710 | /* Stop the process so that we own the stop. */ |
Wichert Akkerman | 16a03d2 | 2000-08-10 02:14:04 +0000 | [diff] [blame] | 711 | if (IOCTL(tcp->pfd, PIOCSTOP, (char *)NULL) < 0) { |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 712 | perror("strace: PIOCSTOP"); |
| 713 | return -1; |
| 714 | } |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 715 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 716 | #ifdef PIOCSET |
| 717 | /* Set Run-on-Last-Close. */ |
| 718 | arg = PR_RLC; |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 719 | if (IOCTL(tcp->pfd, PIOCSET, &arg) < 0) { |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 720 | perror("PIOCSET PR_RLC"); |
| 721 | return -1; |
| 722 | } |
| 723 | /* Set or Reset Inherit-on-Fork. */ |
| 724 | arg = PR_FORK; |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 725 | if (IOCTL(tcp->pfd, followfork ? PIOCSET : PIOCRESET, &arg) < 0) { |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 726 | perror("PIOC{SET,RESET} PR_FORK"); |
| 727 | return -1; |
| 728 | } |
| 729 | #else /* !PIOCSET */ |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 730 | #ifndef FREEBSD |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 731 | if (ioctl(tcp->pfd, PIOCSRLC) < 0) { |
| 732 | perror("PIOCSRLC"); |
| 733 | return -1; |
| 734 | } |
| 735 | if (ioctl(tcp->pfd, followfork ? PIOCSFORK : PIOCRFORK) < 0) { |
| 736 | perror("PIOC{S,R}FORK"); |
| 737 | return -1; |
| 738 | } |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 739 | #else /* FREEBSD */ |
| 740 | /* just unset the PF_LINGER flag for the Run-on-Last-Close. */ |
| 741 | if (ioctl(tcp->pfd, PIOCGFL, &arg) < 0) { |
| 742 | perror("PIOCGFL"); |
| 743 | return -1; |
| 744 | } |
| 745 | arg &= ~PF_LINGER; |
| 746 | if (ioctl(tcp->pfd, PIOCSFL, arg) < 0) { |
| 747 | perror("PIOCSFL"); |
| 748 | return -1; |
| 749 | } |
| 750 | #endif /* FREEBSD */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 751 | #endif /* !PIOCSET */ |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 752 | #ifndef FREEBSD |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 753 | /* Enable all syscall entries. */ |
| 754 | prfillset(&sc_enter); |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 755 | if (IOCTL(tcp->pfd, PIOCSENTRY, &sc_enter) < 0) { |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 756 | perror("PIOCSENTRY"); |
| 757 | return -1; |
| 758 | } |
| 759 | /* Enable all syscall exits. */ |
| 760 | prfillset(&sc_exit); |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 761 | if (IOCTL(tcp->pfd, PIOCSEXIT, &sc_exit) < 0) { |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 762 | perror("PIOSEXIT"); |
| 763 | return -1; |
| 764 | } |
| 765 | /* Enable all signals. */ |
| 766 | prfillset(&signals); |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 767 | if (IOCTL(tcp->pfd, PIOCSTRACE, &signals) < 0) { |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 768 | perror("PIOCSTRACE"); |
| 769 | return -1; |
| 770 | } |
| 771 | /* Enable all faults. */ |
| 772 | prfillset(&faults); |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 773 | if (IOCTL(tcp->pfd, PIOCSFAULT, &faults) < 0) { |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 774 | perror("PIOCSFAULT"); |
| 775 | return -1; |
| 776 | } |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 777 | #else /* FREEBSD */ |
| 778 | /* set events flags. */ |
| 779 | arg = S_SIG | S_SCE | S_SCX ; |
| 780 | if(ioctl(tcp->pfd, PIOCBIS, arg) < 0) { |
| 781 | perror("PIOCBIS"); |
| 782 | return -1; |
| 783 | } |
| 784 | #endif /* FREEBSD */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 785 | if (!attaching) { |
| 786 | #ifdef MIPS |
| 787 | /* |
| 788 | * The SGI PRSABORT doesn't work for pause() so |
| 789 | * we send it a caught signal to wake it up. |
| 790 | */ |
| 791 | kill(tcp->pid, SIGINT); |
| 792 | #else /* !MIPS */ |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 793 | #ifdef PRSABORT |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 794 | /* The child is in a pause(), abort it. */ |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 795 | arg = PRSABORT; |
| 796 | if (IOCTL (tcp->pfd, PIOCRUN, &arg) < 0) { |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 797 | perror("PIOCRUN"); |
| 798 | return -1; |
| 799 | } |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 800 | #endif |
| 801 | #endif /* !MIPS*/ |
| 802 | #ifdef FREEBSD |
| 803 | /* wake up the child if it received the SIGSTOP */ |
| 804 | kill(tcp->pid, SIGCONT); |
| 805 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 806 | for (;;) { |
| 807 | /* Wait for the child to do something. */ |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 808 | if (IOCTL_WSTOP (tcp) < 0) { |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 809 | perror("PIOCWSTOP"); |
| 810 | return -1; |
| 811 | } |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 812 | if (tcp->status.PR_WHY == PR_SYSENTRY) { |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 813 | tcp->flags &= ~TCB_INSYSCALL; |
| 814 | get_scno(tcp); |
| 815 | if (tcp->scno == SYS_execve) |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 816 | break; |
| 817 | } |
| 818 | /* Set it running: maybe execve will be next. */ |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 819 | #ifndef FREEBSD |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 820 | arg = 0; |
| 821 | if (IOCTL(tcp->pfd, PIOCRUN, &arg) < 0) { |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 822 | #else /* FREEBSD */ |
| 823 | if (IOCTL(tcp->pfd, PIOCRUN, 0) < 0) { |
| 824 | #endif /* FREEBSD */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 825 | perror("PIOCRUN"); |
| 826 | return -1; |
| 827 | } |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 828 | #ifdef FREEBSD |
| 829 | /* handle the case where we "opened" the child before |
| 830 | it did the kill -STOP */ |
| 831 | if (tcp->status.PR_WHY == PR_SIGNALLED && |
| 832 | tcp->status.PR_WHAT == SIGSTOP) |
| 833 | kill(tcp->pid, SIGCONT); |
| 834 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 835 | } |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 836 | #ifndef FREEBSD |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 837 | } |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 838 | #else /* FREEBSD */ |
| 839 | } else { |
Wichert Akkerman | 2e4ffe5 | 2000-09-03 23:57:48 +0000 | [diff] [blame] | 840 | if (attaching < 2) { |
| 841 | /* We are attaching to an already running process. |
| 842 | * Try to figure out the state of the process in syscalls, |
| 843 | * to handle the first event well. |
| 844 | * This is done by having a look at the "wchan" property of the |
| 845 | * process, which tells where it is stopped (if it is). */ |
| 846 | FILE * status; |
| 847 | char wchan[20]; /* should be enough */ |
| 848 | |
| 849 | sprintf(proc, "/proc/%d/status", tcp->pid); |
| 850 | status = fopen(proc, "r"); |
| 851 | if (status && |
| 852 | (fscanf(status, "%*s %*d %*d %*d %*d %*d,%*d %*s %*d,%*d" |
| 853 | "%*d,%*d %*d,%*d %19s", wchan) == 1) && |
| 854 | strcmp(wchan, "nochan") && strcmp(wchan, "spread") && |
| 855 | strcmp(wchan, "stopevent")) { |
| 856 | /* The process is asleep in the middle of a syscall. |
| 857 | Fake the syscall entry event */ |
| 858 | tcp->flags &= ~(TCB_INSYSCALL|TCB_STARTUP); |
| 859 | tcp->status.PR_WHY = PR_SYSENTRY; |
| 860 | trace_syscall(tcp); |
| 861 | } |
| 862 | if (status) |
| 863 | fclose(status); |
| 864 | } /* otherwise it's a fork being followed */ |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 865 | } |
| 866 | #endif /* FREEBSD */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 867 | #ifndef HAVE_POLLABLE_PROCFS |
| 868 | if (proc_poll_pipe[0] != -1) |
| 869 | proc_poller(tcp->pfd); |
| 870 | else if (nprocs > 1) { |
| 871 | proc_poll_open(); |
| 872 | proc_poller(last_pfd); |
| 873 | proc_poller(tcp->pfd); |
| 874 | } |
| 875 | last_pfd = tcp->pfd; |
| 876 | #endif /* !HAVE_POLLABLE_PROCFS */ |
| 877 | return 0; |
| 878 | } |
| 879 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 880 | #endif /* USE_PROCFS */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 881 | |
| 882 | static struct tcb * |
| 883 | pid2tcb(pid) |
| 884 | int pid; |
| 885 | { |
| 886 | int i; |
| 887 | struct tcb *tcp; |
| 888 | |
| 889 | for (i = 0, tcp = tcbtab; i < MAX_PROCS; i++, tcp++) { |
| 890 | if (pid && tcp->pid != pid) |
| 891 | continue; |
| 892 | if (tcp->flags & TCB_INUSE) |
| 893 | return tcp; |
| 894 | } |
| 895 | return NULL; |
| 896 | } |
| 897 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 898 | #ifdef USE_PROCFS |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 899 | |
| 900 | static struct tcb * |
| 901 | pfd2tcb(pfd) |
| 902 | int pfd; |
| 903 | { |
| 904 | int i; |
| 905 | struct tcb *tcp; |
| 906 | |
| 907 | for (i = 0, tcp = tcbtab; i < MAX_PROCS; i++, tcp++) { |
| 908 | if (tcp->pfd != pfd) |
| 909 | continue; |
| 910 | if (tcp->flags & TCB_INUSE) |
| 911 | return tcp; |
| 912 | } |
| 913 | return NULL; |
| 914 | } |
| 915 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 916 | #endif /* USE_PROCFS */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 917 | |
| 918 | void |
| 919 | droptcb(tcp) |
| 920 | struct tcb *tcp; |
| 921 | { |
| 922 | if (tcp->pid == 0) |
| 923 | return; |
| 924 | nprocs--; |
| 925 | tcp->pid = 0; |
| 926 | tcp->flags = 0; |
| 927 | if (tcp->pfd != -1) { |
| 928 | close(tcp->pfd); |
| 929 | tcp->pfd = -1; |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 930 | #ifdef FREEBSD |
| 931 | if (tcp->pfd_reg != -1) { |
| 932 | close(tcp->pfd_reg); |
| 933 | tcp->pfd_reg = -1; |
| 934 | } |
| 935 | if (tcp->pfd_status != -1) { |
| 936 | close(tcp->pfd_status); |
| 937 | tcp->pfd_status = -1; |
| 938 | } |
| 939 | #endif /* !FREEBSD */ |
| 940 | #ifdef USE_PROCFS |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 941 | rebuild_pollv(); |
| 942 | #endif |
| 943 | } |
| 944 | if (tcp->parent != NULL) { |
| 945 | tcp->parent->nchildren--; |
| 946 | tcp->parent = NULL; |
| 947 | } |
| 948 | #if 0 |
| 949 | if (tcp->outf != stderr) |
| 950 | fclose(tcp->outf); |
| 951 | #endif |
| 952 | tcp->outf = 0; |
| 953 | } |
| 954 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 955 | #ifndef USE_PROCFS |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 956 | |
| 957 | static int |
| 958 | resume(tcp) |
| 959 | struct tcb *tcp; |
| 960 | { |
| 961 | if (tcp == NULL) |
| 962 | return -1; |
| 963 | |
| 964 | if (!(tcp->flags & TCB_SUSPENDED)) { |
| 965 | fprintf(stderr, "PANIC: pid %u not suspended\n", tcp->pid); |
| 966 | return -1; |
| 967 | } |
| 968 | tcp->flags &= ~TCB_SUSPENDED; |
| 969 | |
| 970 | if (ptrace(PTRACE_SYSCALL, tcp->pid, (char *) 1, 0) < 0) { |
| 971 | perror("resume: ptrace(PTRACE_SYSCALL, ...)"); |
| 972 | return -1; |
| 973 | } |
| 974 | |
| 975 | if (!qflag) |
| 976 | fprintf(stderr, "Process %u resumed\n", tcp->pid); |
| 977 | return 0; |
| 978 | } |
| 979 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 980 | #endif /* !USE_PROCFS */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 981 | |
| 982 | /* detach traced process; continue with sig */ |
| 983 | |
| 984 | static int |
| 985 | detach(tcp, sig) |
| 986 | struct tcb *tcp; |
| 987 | int sig; |
| 988 | { |
| 989 | int error = 0; |
| 990 | #ifdef LINUX |
| 991 | int status; |
| 992 | #endif |
| 993 | |
| 994 | if (tcp->flags & TCB_BPTSET) |
| 995 | sig = SIGKILL; |
| 996 | |
| 997 | #ifdef LINUX |
| 998 | /* |
| 999 | * Linux wrongly insists the child be stopped |
| 1000 | * before detaching. Arghh. We go through hoops |
| 1001 | * to make a clean break of things. |
| 1002 | */ |
Wichert Akkerman | dacfb6e | 1999-06-03 14:21:07 +0000 | [diff] [blame] | 1003 | #if defined(SPARC) |
| 1004 | #undef PTRACE_DETACH |
| 1005 | #define PTRACE_DETACH PTRACE_SUNDETACH |
| 1006 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1007 | if ((error = ptrace(PTRACE_DETACH, tcp->pid, (char *) 1, sig)) == 0) { |
| 1008 | /* On a clear day, you can see forever. */ |
| 1009 | } |
| 1010 | else if (errno != ESRCH) { |
| 1011 | /* Shouldn't happen. */ |
| 1012 | perror("detach: ptrace(PTRACE_DETACH, ...)"); |
| 1013 | } |
| 1014 | else if (kill(tcp->pid, 0) < 0) { |
| 1015 | if (errno != ESRCH) |
| 1016 | perror("detach: checking sanity"); |
| 1017 | } |
| 1018 | else if (kill(tcp->pid, SIGSTOP) < 0) { |
| 1019 | if (errno != ESRCH) |
| 1020 | perror("detach: stopping child"); |
| 1021 | } |
| 1022 | else { |
| 1023 | for (;;) { |
| 1024 | if (waitpid(tcp->pid, &status, 0) < 0) { |
| 1025 | if (errno != ECHILD) |
| 1026 | perror("detach: waiting"); |
| 1027 | break; |
| 1028 | } |
| 1029 | if (!WIFSTOPPED(status)) { |
| 1030 | /* Au revoir, mon ami. */ |
| 1031 | break; |
| 1032 | } |
| 1033 | if (WSTOPSIG(status) == SIGSTOP) { |
| 1034 | if ((error = ptrace(PTRACE_DETACH, |
| 1035 | tcp->pid, (char *) 1, sig)) < 0) { |
| 1036 | if (errno != ESRCH) |
| 1037 | perror("detach: ptrace(PTRACE_DETACH, ...)"); |
| 1038 | /* I died trying. */ |
| 1039 | } |
| 1040 | break; |
| 1041 | } |
| 1042 | if ((error = ptrace(PTRACE_CONT, tcp->pid, (char *) 1, |
| 1043 | WSTOPSIG(status) == SIGTRAP ? |
| 1044 | 0 : WSTOPSIG(status))) < 0) { |
| 1045 | if (errno != ESRCH) |
| 1046 | perror("detach: ptrace(PTRACE_CONT, ...)"); |
| 1047 | break; |
| 1048 | } |
| 1049 | } |
| 1050 | } |
| 1051 | #endif /* LINUX */ |
| 1052 | |
| 1053 | #if defined(SUNOS4) |
| 1054 | /* PTRACE_DETACH won't respect `sig' argument, so we post it here. */ |
| 1055 | if (sig && kill(tcp->pid, sig) < 0) |
| 1056 | perror("detach: kill"); |
| 1057 | sig = 0; |
| 1058 | if ((error = ptrace(PTRACE_DETACH, tcp->pid, (char *) 1, sig)) < 0) |
| 1059 | perror("detach: ptrace(PTRACE_DETACH, ...)"); |
| 1060 | #endif /* SUNOS4 */ |
| 1061 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1062 | #ifndef USE_PROCFS |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1063 | if (waiting_parent(tcp)) |
| 1064 | error = resume(tcp->parent); |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1065 | #endif /* !USE_PROCFS */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1066 | |
| 1067 | if (!qflag) |
| 1068 | fprintf(stderr, "Process %u detached\n", tcp->pid); |
| 1069 | |
| 1070 | droptcb(tcp); |
| 1071 | return error; |
| 1072 | } |
| 1073 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1074 | #ifdef USE_PROCFS |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1075 | |
| 1076 | static void |
| 1077 | reaper(sig) |
| 1078 | int sig; |
| 1079 | { |
| 1080 | int pid; |
| 1081 | int status; |
| 1082 | |
| 1083 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) { |
| 1084 | #if 0 |
| 1085 | struct tcb *tcp; |
| 1086 | |
| 1087 | tcp = pid2tcb(pid); |
| 1088 | if (tcp) |
| 1089 | droptcb(tcp); |
| 1090 | #endif |
| 1091 | } |
| 1092 | } |
| 1093 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1094 | #endif /* USE_PROCFS */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1095 | |
| 1096 | static void |
| 1097 | cleanup() |
| 1098 | { |
| 1099 | int i; |
| 1100 | struct tcb *tcp; |
| 1101 | |
| 1102 | for (i = 0, tcp = tcbtab; i < MAX_PROCS; i++, tcp++) { |
| 1103 | if (!(tcp->flags & TCB_INUSE)) |
| 1104 | continue; |
| 1105 | if (debug) |
| 1106 | fprintf(stderr, |
| 1107 | "cleanup: looking at pid %u\n", tcp->pid); |
| 1108 | if (tcp_last && |
| 1109 | (!outfname || followfork < 2 || tcp_last == tcp)) { |
| 1110 | tprintf(" <unfinished ...>\n"); |
| 1111 | tcp_last = NULL; |
| 1112 | } |
| 1113 | if (tcp->flags & TCB_ATTACHED) |
| 1114 | detach(tcp, 0); |
| 1115 | else { |
| 1116 | kill(tcp->pid, SIGCONT); |
| 1117 | kill(tcp->pid, SIGTERM); |
| 1118 | } |
| 1119 | } |
| 1120 | if (cflag) |
| 1121 | call_summary(outf); |
| 1122 | } |
| 1123 | |
| 1124 | static void |
| 1125 | interrupt(sig) |
| 1126 | int sig; |
| 1127 | { |
| 1128 | interrupted = 1; |
| 1129 | } |
| 1130 | |
| 1131 | #ifndef HAVE_STRERROR |
| 1132 | |
| 1133 | #ifndef SYS_ERRLIST_DECLARED |
| 1134 | extern int sys_nerr; |
| 1135 | extern char *sys_errlist[]; |
| 1136 | #endif /* SYS_ERRLIST_DECLARED */ |
| 1137 | |
| 1138 | const char * |
| 1139 | strerror(errno) |
| 1140 | int errno; |
| 1141 | { |
| 1142 | static char buf[64]; |
| 1143 | |
| 1144 | if (errno < 1 || errno >= sys_nerr) { |
| 1145 | sprintf(buf, "Unknown error %d", errno); |
| 1146 | return buf; |
| 1147 | } |
| 1148 | return sys_errlist[errno]; |
| 1149 | } |
| 1150 | |
| 1151 | #endif /* HAVE_STERRROR */ |
| 1152 | |
| 1153 | #ifndef HAVE_STRSIGNAL |
| 1154 | |
| 1155 | #ifndef SYS_SIGLIST_DECLARED |
| 1156 | #ifdef HAVE__SYS_SIGLIST |
| 1157 | extern char *_sys_siglist[]; |
| 1158 | #else |
| 1159 | extern char *sys_siglist[]; |
| 1160 | #endif |
| 1161 | #endif /* SYS_SIGLIST_DECLARED */ |
| 1162 | |
| 1163 | const char * |
| 1164 | strsignal(sig) |
| 1165 | int sig; |
| 1166 | { |
| 1167 | static char buf[64]; |
| 1168 | |
| 1169 | if (sig < 1 || sig >= NSIG) { |
| 1170 | sprintf(buf, "Unknown signal %d", sig); |
| 1171 | return buf; |
| 1172 | } |
| 1173 | #ifdef HAVE__SYS_SIGLIST |
| 1174 | return _sys_siglist[sig]; |
| 1175 | #else |
| 1176 | return sys_siglist[sig]; |
| 1177 | #endif |
| 1178 | } |
| 1179 | |
| 1180 | #endif /* HAVE_STRSIGNAL */ |
| 1181 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1182 | #ifdef USE_PROCFS |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1183 | |
| 1184 | static void |
| 1185 | rebuild_pollv() |
| 1186 | { |
| 1187 | int i, j; |
| 1188 | struct tcb *tcp; |
| 1189 | |
| 1190 | for (i = j = 0, tcp = tcbtab; i < MAX_PROCS; i++, tcp++) { |
| 1191 | if (!(tcp->flags & TCB_INUSE)) |
| 1192 | continue; |
| 1193 | pollv[j].fd = tcp->pfd; |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1194 | pollv[j].events = POLLWANT; |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1195 | j++; |
| 1196 | } |
| 1197 | if (j != nprocs) { |
| 1198 | fprintf(stderr, "strace: proc miscount\n"); |
| 1199 | exit(1); |
| 1200 | } |
| 1201 | } |
| 1202 | |
| 1203 | #ifndef HAVE_POLLABLE_PROCFS |
| 1204 | |
| 1205 | static void |
| 1206 | proc_poll_open() |
| 1207 | { |
| 1208 | int arg; |
| 1209 | int i; |
| 1210 | |
| 1211 | if (pipe(proc_poll_pipe) < 0) { |
| 1212 | perror("pipe"); |
| 1213 | exit(1); |
| 1214 | } |
| 1215 | for (i = 0; i < 2; i++) { |
| 1216 | if ((arg = fcntl(proc_poll_pipe[i], F_GETFD)) < 0) { |
| 1217 | perror("F_GETFD"); |
| 1218 | exit(1); |
| 1219 | } |
| 1220 | if (fcntl(proc_poll_pipe[i], F_SETFD, arg|FD_CLOEXEC) < 0) { |
| 1221 | perror("F_SETFD"); |
| 1222 | exit(1); |
| 1223 | } |
| 1224 | } |
| 1225 | } |
| 1226 | |
| 1227 | static int |
| 1228 | proc_poll(pollv, nfds, timeout) |
| 1229 | struct pollfd *pollv; |
| 1230 | int nfds; |
| 1231 | int timeout; |
| 1232 | { |
| 1233 | int i; |
| 1234 | int n; |
| 1235 | struct proc_pollfd pollinfo; |
| 1236 | |
| 1237 | if ((n = read(proc_poll_pipe[0], &pollinfo, sizeof(pollinfo))) < 0) |
| 1238 | return n; |
| 1239 | if (n != sizeof(struct proc_pollfd)) { |
| 1240 | fprintf(stderr, "panic: short read: %d\n", n); |
| 1241 | exit(1); |
| 1242 | } |
| 1243 | for (i = 0; i < nprocs; i++) { |
| 1244 | if (pollv[i].fd == pollinfo.fd) |
| 1245 | pollv[i].revents = pollinfo.revents; |
| 1246 | else |
| 1247 | pollv[i].revents = 0; |
| 1248 | } |
| 1249 | poller_pid = pollinfo.pid; |
| 1250 | return 1; |
| 1251 | } |
| 1252 | |
| 1253 | static void |
| 1254 | wakeup_handler(sig) |
| 1255 | int sig; |
| 1256 | { |
| 1257 | } |
| 1258 | |
| 1259 | static void |
| 1260 | proc_poller(pfd) |
| 1261 | int pfd; |
| 1262 | { |
| 1263 | struct proc_pollfd pollinfo; |
| 1264 | struct sigaction sa; |
| 1265 | sigset_t blocked_set, empty_set; |
| 1266 | int i; |
| 1267 | int n; |
| 1268 | struct rlimit rl; |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1269 | #ifdef FREEBSD |
| 1270 | struct procfs_status pfs; |
| 1271 | #endif /* FREEBSD */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1272 | |
| 1273 | switch (fork()) { |
| 1274 | case -1: |
| 1275 | perror("fork"); |
| 1276 | _exit(0); |
| 1277 | case 0: |
| 1278 | break; |
| 1279 | default: |
| 1280 | return; |
| 1281 | } |
| 1282 | |
| 1283 | sa.sa_handler = interactive ? SIG_DFL : SIG_IGN; |
| 1284 | sa.sa_flags = 0; |
| 1285 | sigemptyset(&sa.sa_mask); |
| 1286 | sigaction(SIGHUP, &sa, NULL); |
| 1287 | sigaction(SIGINT, &sa, NULL); |
| 1288 | sigaction(SIGQUIT, &sa, NULL); |
| 1289 | sigaction(SIGPIPE, &sa, NULL); |
| 1290 | sigaction(SIGTERM, &sa, NULL); |
| 1291 | sa.sa_handler = wakeup_handler; |
| 1292 | sigaction(SIGUSR1, &sa, NULL); |
| 1293 | sigemptyset(&blocked_set); |
| 1294 | sigaddset(&blocked_set, SIGUSR1); |
| 1295 | sigprocmask(SIG_BLOCK, &blocked_set, NULL); |
| 1296 | sigemptyset(&empty_set); |
| 1297 | |
| 1298 | if (getrlimit(RLIMIT_NOFILE, &rl) < 0) { |
| 1299 | perror("getrlimit(RLIMIT_NOFILE, ...)"); |
| 1300 | _exit(0); |
| 1301 | } |
| 1302 | n = rl.rlim_cur; |
| 1303 | for (i = 0; i < n; i++) { |
| 1304 | if (i != pfd && i != proc_poll_pipe[1]) |
| 1305 | close(i); |
| 1306 | } |
| 1307 | |
| 1308 | pollinfo.fd = pfd; |
| 1309 | pollinfo.pid = getpid(); |
| 1310 | for (;;) { |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1311 | #ifndef FREEBSD |
| 1312 | if (ioctl(pfd, PIOCWSTOP, NULL) < 0) |
| 1313 | #else /* FREEBSD */ |
| 1314 | if (ioctl(pfd, PIOCWSTOP, &pfs) < 0) |
| 1315 | #endif /* FREEBSD */ |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1316 | { |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1317 | switch (errno) { |
| 1318 | case EINTR: |
| 1319 | continue; |
| 1320 | case EBADF: |
| 1321 | pollinfo.revents = POLLERR; |
| 1322 | break; |
| 1323 | case ENOENT: |
| 1324 | pollinfo.revents = POLLHUP; |
| 1325 | break; |
| 1326 | default: |
| 1327 | perror("proc_poller: PIOCWSTOP"); |
| 1328 | } |
| 1329 | write(proc_poll_pipe[1], &pollinfo, sizeof(pollinfo)); |
| 1330 | _exit(0); |
| 1331 | } |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1332 | pollinfo.revents = POLLWANT; |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1333 | write(proc_poll_pipe[1], &pollinfo, sizeof(pollinfo)); |
| 1334 | sigsuspend(&empty_set); |
| 1335 | } |
| 1336 | } |
| 1337 | |
| 1338 | #endif /* !HAVE_POLLABLE_PROCFS */ |
| 1339 | |
| 1340 | static int |
| 1341 | choose_pfd() |
| 1342 | { |
| 1343 | int i, j; |
| 1344 | struct tcb *tcp; |
| 1345 | |
| 1346 | static int last; |
| 1347 | |
| 1348 | if (followfork < 2 && |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1349 | last < nprocs && (pollv[last].revents & POLLWANT)) { |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1350 | /* |
| 1351 | * The previous process is ready to run again. We'll |
| 1352 | * let it do so if it is currently in a syscall. This |
| 1353 | * heuristic improves the readability of the trace. |
| 1354 | */ |
| 1355 | tcp = pfd2tcb(pollv[last].fd); |
| 1356 | if (tcp && (tcp->flags & TCB_INSYSCALL)) |
| 1357 | return pollv[last].fd; |
| 1358 | } |
| 1359 | |
| 1360 | for (i = 0; i < nprocs; i++) { |
| 1361 | /* Let competing children run round robin. */ |
| 1362 | j = (i + last + 1) % nprocs; |
| 1363 | if (pollv[j].revents & (POLLHUP | POLLERR)) { |
| 1364 | tcp = pfd2tcb(pollv[j].fd); |
| 1365 | if (!tcp) { |
| 1366 | fprintf(stderr, "strace: lost proc\n"); |
| 1367 | exit(1); |
| 1368 | } |
| 1369 | droptcb(tcp); |
| 1370 | return -1; |
| 1371 | } |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1372 | if (pollv[j].revents & POLLWANT) { |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1373 | last = j; |
| 1374 | return pollv[j].fd; |
| 1375 | } |
| 1376 | } |
| 1377 | fprintf(stderr, "strace: nothing ready\n"); |
| 1378 | exit(1); |
| 1379 | } |
| 1380 | |
| 1381 | static int |
| 1382 | trace() |
| 1383 | { |
Wichert Akkerman | 9dbf154 | 1999-11-26 13:11:29 +0000 | [diff] [blame] | 1384 | #ifdef POLL_HACK |
| 1385 | struct tcb *in_syscall; |
| 1386 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1387 | struct tcb *tcp; |
| 1388 | int pfd; |
| 1389 | int what; |
| 1390 | int ioctl_result = 0, ioctl_errno = 0; |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1391 | long arg; |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1392 | |
| 1393 | for (;;) { |
| 1394 | if (interactive) |
| 1395 | sigprocmask(SIG_SETMASK, &empty_set, NULL); |
| 1396 | |
| 1397 | if (nprocs == 0) |
| 1398 | break; |
| 1399 | |
| 1400 | switch (nprocs) { |
| 1401 | case 1: |
| 1402 | #ifndef HAVE_POLLABLE_PROCFS |
| 1403 | if (proc_poll_pipe[0] == -1) { |
| 1404 | #endif |
| 1405 | tcp = pid2tcb(0); |
| 1406 | if (!tcp) |
| 1407 | continue; |
| 1408 | pfd = tcp->pfd; |
| 1409 | if (pfd == -1) |
| 1410 | continue; |
| 1411 | break; |
| 1412 | #ifndef HAVE_POLLABLE_PROCFS |
| 1413 | } |
| 1414 | /* fall through ... */ |
| 1415 | #endif /* !HAVE_POLLABLE_PROCFS */ |
| 1416 | default: |
| 1417 | #ifdef HAVE_POLLABLE_PROCFS |
Wichert Akkerman | 9dbf154 | 1999-11-26 13:11:29 +0000 | [diff] [blame] | 1418 | #ifdef POLL_HACK |
| 1419 | /* On some systems (e.g. UnixWare) we get too much ugly |
| 1420 | "unfinished..." stuff when multiple proceses are in |
| 1421 | syscalls. Here's a nasty hack */ |
| 1422 | |
| 1423 | if (in_syscall) { |
| 1424 | struct pollfd pv; |
| 1425 | tcp = in_syscall; |
| 1426 | in_syscall = NULL; |
| 1427 | pv.fd = tcp->pfd; |
| 1428 | pv.events = POLLWANT; |
| 1429 | if ((what = poll (&pv, 1, 1)) < 0) { |
| 1430 | if (interrupted) |
| 1431 | return 0; |
| 1432 | continue; |
| 1433 | } |
| 1434 | else if (what == 1 && pv.revents & POLLWANT) { |
| 1435 | goto FOUND; |
| 1436 | } |
| 1437 | } |
| 1438 | #endif |
| 1439 | |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1440 | if (poll(pollv, nprocs, INFTIM) < 0) { |
| 1441 | if (interrupted) |
| 1442 | return 0; |
| 1443 | continue; |
| 1444 | } |
| 1445 | #else /* !HAVE_POLLABLE_PROCFS */ |
| 1446 | if (proc_poll(pollv, nprocs, INFTIM) < 0) { |
| 1447 | if (interrupted) |
| 1448 | return 0; |
| 1449 | continue; |
| 1450 | } |
| 1451 | #endif /* !HAVE_POLLABLE_PROCFS */ |
| 1452 | pfd = choose_pfd(); |
| 1453 | if (pfd == -1) |
| 1454 | continue; |
| 1455 | break; |
| 1456 | } |
| 1457 | |
| 1458 | /* Look up `pfd' in our table. */ |
| 1459 | if ((tcp = pfd2tcb(pfd)) == NULL) { |
| 1460 | fprintf(stderr, "unknown pfd: %u\n", pfd); |
| 1461 | exit(1); |
| 1462 | } |
Wichert Akkerman | 9dbf154 | 1999-11-26 13:11:29 +0000 | [diff] [blame] | 1463 | FOUND: |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1464 | /* Get the status of the process. */ |
| 1465 | if (!interrupted) { |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1466 | #ifndef FREEBSD |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1467 | ioctl_result = IOCTL_WSTOP (tcp); |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1468 | #else /* FREEBSD */ |
| 1469 | /* Thanks to some scheduling mystery, the first poller |
| 1470 | sometimes waits for the already processed end of fork |
| 1471 | event. Doing a non blocking poll here solves the problem. */ |
| 1472 | if (proc_poll_pipe[0] != -1) |
| 1473 | ioctl_result = IOCTL_STATUS (tcp); |
| 1474 | else |
| 1475 | ioctl_result = IOCTL_WSTOP (tcp); |
| 1476 | #endif /* FREEBSD */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1477 | ioctl_errno = errno; |
| 1478 | #ifndef HAVE_POLLABLE_PROCFS |
| 1479 | if (proc_poll_pipe[0] != -1) { |
| 1480 | if (ioctl_result < 0) |
| 1481 | kill(poller_pid, SIGKILL); |
| 1482 | else |
| 1483 | kill(poller_pid, SIGUSR1); |
| 1484 | } |
| 1485 | #endif /* !HAVE_POLLABLE_PROCFS */ |
| 1486 | } |
| 1487 | if (interrupted) |
| 1488 | return 0; |
| 1489 | |
| 1490 | if (interactive) |
| 1491 | sigprocmask(SIG_BLOCK, &blocked_set, NULL); |
| 1492 | |
| 1493 | if (ioctl_result < 0) { |
| 1494 | /* Find out what happened if it failed. */ |
| 1495 | switch (ioctl_errno) { |
| 1496 | case EINTR: |
| 1497 | case EBADF: |
| 1498 | continue; |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1499 | #ifdef FREEBSD |
| 1500 | case ENOTTY: |
| 1501 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1502 | case ENOENT: |
| 1503 | droptcb(tcp); |
| 1504 | continue; |
| 1505 | default: |
| 1506 | perror("PIOCWSTOP"); |
| 1507 | exit(1); |
| 1508 | } |
| 1509 | } |
| 1510 | |
Wichert Akkerman | 2e4ffe5 | 2000-09-03 23:57:48 +0000 | [diff] [blame] | 1511 | #ifdef FREEBSD |
| 1512 | if ((tcp->flags & TCB_STARTUP) && (tcp->status.PR_WHY == PR_SYSEXIT)) { |
| 1513 | /* discard first event for a syscall we never entered */ |
| 1514 | IOCTL (tcp->pfd, PIOCRUN, 0); |
| 1515 | continue; |
| 1516 | } |
| 1517 | #endif |
| 1518 | |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1519 | /* clear the just started flag */ |
| 1520 | tcp->flags &= ~TCB_STARTUP; |
| 1521 | |
| 1522 | /* set current output file */ |
| 1523 | outf = tcp->outf; |
| 1524 | |
| 1525 | if (cflag) { |
| 1526 | struct timeval stime; |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1527 | #ifdef FREEBSD |
| 1528 | char buf[1024]; |
| 1529 | int len; |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1530 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1531 | if ((len = pread(tcp->pfd_status, buf, sizeof(buf) - 1, 0)) > 0) { |
| 1532 | buf[len] = '\0'; |
| 1533 | sscanf(buf, |
| 1534 | "%*s %*d %*d %*d %*d %*d,%*d %*s %*d,%*d %*d,%*d %ld,%ld", |
| 1535 | &stime.tv_sec, &stime.tv_usec); |
| 1536 | } else |
| 1537 | stime.tv_sec = stime.tv_usec = 0; |
| 1538 | #else /* !FREEBSD */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1539 | stime.tv_sec = tcp->status.pr_stime.tv_sec; |
| 1540 | stime.tv_usec = tcp->status.pr_stime.tv_nsec/1000; |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1541 | #endif /* !FREEBSD */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1542 | tv_sub(&tcp->dtime, &stime, &tcp->stime); |
| 1543 | tcp->stime = stime; |
| 1544 | } |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1545 | what = tcp->status.PR_WHAT; |
| 1546 | switch (tcp->status.PR_WHY) { |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1547 | #ifndef FREEBSD |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1548 | case PR_REQUESTED: |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1549 | if (tcp->status.PR_FLAGS & PR_ASLEEP) { |
| 1550 | tcp->status.PR_WHY = PR_SYSENTRY; |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1551 | if (trace_syscall(tcp) < 0) { |
| 1552 | fprintf(stderr, "syscall trouble\n"); |
| 1553 | exit(1); |
| 1554 | } |
| 1555 | } |
| 1556 | break; |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1557 | #endif /* !FREEBSD */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1558 | case PR_SYSENTRY: |
Wichert Akkerman | 9dbf154 | 1999-11-26 13:11:29 +0000 | [diff] [blame] | 1559 | #ifdef POLL_HACK |
| 1560 | in_syscall = tcp; |
| 1561 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1562 | case PR_SYSEXIT: |
| 1563 | if (trace_syscall(tcp) < 0) { |
| 1564 | fprintf(stderr, "syscall trouble\n"); |
| 1565 | exit(1); |
| 1566 | } |
| 1567 | break; |
| 1568 | case PR_SIGNALLED: |
| 1569 | if (!cflag && (qual_flags[what] & QUAL_SIGNAL)) { |
| 1570 | printleader(tcp); |
| 1571 | tprintf("--- %s (%s) ---", |
Nate Sammons | ce780fc | 1999-03-29 23:23:13 +0000 | [diff] [blame] | 1572 | signame(what), strsignal(what)); |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1573 | printtrailer(tcp); |
| 1574 | } |
| 1575 | break; |
| 1576 | case PR_FAULTED: |
| 1577 | if (!cflag && (qual_flags[what] & QUAL_FAULT)) { |
| 1578 | printleader(tcp); |
| 1579 | tprintf("=== FAULT %d ===", what); |
| 1580 | printtrailer(tcp); |
| 1581 | } |
| 1582 | break; |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1583 | #ifdef FREEBSD |
| 1584 | case 0: /* handle case we polled for nothing */ |
| 1585 | continue; |
| 1586 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1587 | default: |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1588 | fprintf(stderr, "odd stop %d\n", tcp->status.PR_WHY); |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1589 | exit(1); |
| 1590 | break; |
| 1591 | } |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1592 | arg = 0; |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1593 | #ifndef FREEBSD |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1594 | if (IOCTL (tcp->pfd, PIOCRUN, &arg) < 0) { |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1595 | #else |
| 1596 | if (IOCTL (tcp->pfd, PIOCRUN, 0) < 0) { |
| 1597 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1598 | perror("PIOCRUN"); |
| 1599 | exit(1); |
| 1600 | } |
| 1601 | } |
| 1602 | return 0; |
| 1603 | } |
| 1604 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1605 | #else /* !USE_PROCFS */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1606 | |
| 1607 | static int |
| 1608 | trace() |
| 1609 | { |
| 1610 | int pid; |
| 1611 | int wait_errno; |
| 1612 | int status; |
| 1613 | struct tcb *tcp; |
| 1614 | #ifdef LINUX |
| 1615 | struct rusage ru; |
Wichert Akkerman | 2f1d87e | 2001-03-28 14:40:14 +0000 | [diff] [blame] | 1616 | #ifdef __WALL |
| 1617 | static int wait4_options = __WALL; |
| 1618 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1619 | #endif /* LINUX */ |
| 1620 | |
| 1621 | while (nprocs != 0) { |
| 1622 | if (interactive) |
| 1623 | sigprocmask(SIG_SETMASK, &empty_set, NULL); |
| 1624 | #ifdef LINUX |
Wichert Akkerman | 2f1d87e | 2001-03-28 14:40:14 +0000 | [diff] [blame] | 1625 | #ifdef __WALL |
| 1626 | pid = wait4(-1, &status, wait4_options, cflag ? &ru : NULL); |
| 1627 | if ((wait4_options & __WALL) && errno == EINVAL) { |
| 1628 | /* this kernel does not support __WALL */ |
| 1629 | wait4_options &= ~__WALL; |
| 1630 | errno = 0; |
| 1631 | pid = wait4(-1, &status, wait4_options, |
| 1632 | cflag ? &ru : NULL); |
| 1633 | } |
| 1634 | if (!(wait4_options & __WALL) && errno == ECHILD) { |
| 1635 | /* most likely a "cloned" process */ |
| 1636 | pid = wait4(-1, &status, __WCLONE, |
| 1637 | cflag ? &ru : NULL); |
| 1638 | if (pid == -1) { |
| 1639 | fprintf(stderr, "strace: clone wait4 " |
| 1640 | "failed: %s\n", strerror(errno)); |
| 1641 | } |
| 1642 | } |
| 1643 | #else |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1644 | pid = wait4(-1, &status, 0, cflag ? &ru : NULL); |
Wichert Akkerman | 2f1d87e | 2001-03-28 14:40:14 +0000 | [diff] [blame] | 1645 | #endif /* __WALL */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1646 | #endif /* LINUX */ |
| 1647 | #ifdef SUNOS4 |
| 1648 | pid = wait(&status); |
| 1649 | #endif /* SUNOS4 */ |
| 1650 | wait_errno = errno; |
| 1651 | if (interactive) |
| 1652 | sigprocmask(SIG_BLOCK, &blocked_set, NULL); |
| 1653 | |
| 1654 | if (interrupted) |
| 1655 | return 0; |
| 1656 | |
| 1657 | if (pid == -1) { |
| 1658 | switch (wait_errno) { |
| 1659 | case EINTR: |
| 1660 | continue; |
| 1661 | case ECHILD: |
| 1662 | /* |
| 1663 | * We would like to verify this case |
| 1664 | * but sometimes a race in Solbourne's |
| 1665 | * version of SunOS sometimes reports |
| 1666 | * ECHILD before sending us SIGCHILD. |
| 1667 | */ |
| 1668 | #if 0 |
| 1669 | if (nprocs == 0) |
| 1670 | return 0; |
| 1671 | fprintf(stderr, "strace: proc miscount\n"); |
| 1672 | exit(1); |
| 1673 | #endif |
| 1674 | return 0; |
| 1675 | default: |
| 1676 | errno = wait_errno; |
| 1677 | perror("strace: wait"); |
| 1678 | return -1; |
| 1679 | } |
| 1680 | } |
| 1681 | if (debug) |
| 1682 | fprintf(stderr, " [wait(%#x) = %u]\n", status, pid); |
| 1683 | |
| 1684 | /* Look up `pid' in our table. */ |
| 1685 | if ((tcp = pid2tcb(pid)) == NULL) { |
Wichert Akkerman | faf7222 | 2000-02-19 23:59:03 +0000 | [diff] [blame] | 1686 | #if 0 /* XXX davidm */ /* WTA: disabled again */ |
Wichert Akkerman | 8b1b40c | 2000-02-03 21:58:30 +0000 | [diff] [blame] | 1687 | struct tcb *tcpchild; |
| 1688 | |
| 1689 | if ((tcpchild = alloctcb(pid)) == NULL) { |
| 1690 | fprintf(stderr, " [tcb table full]\n"); |
| 1691 | kill(pid, SIGKILL); /* XXX */ |
| 1692 | return 0; |
| 1693 | } |
| 1694 | tcpchild->flags |= TCB_ATTACHED; |
| 1695 | newoutf(tcpchild); |
| 1696 | tcp->nchildren++; |
| 1697 | if (!qflag) |
| 1698 | fprintf(stderr, "Process %d attached\n", pid); |
| 1699 | #else |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1700 | fprintf(stderr, "unknown pid: %u\n", pid); |
| 1701 | if (WIFSTOPPED(status)) |
| 1702 | ptrace(PTRACE_CONT, pid, (char *) 1, 0); |
| 1703 | exit(1); |
Wichert Akkerman | 8b1b40c | 2000-02-03 21:58:30 +0000 | [diff] [blame] | 1704 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1705 | } |
| 1706 | /* set current output file */ |
| 1707 | outf = tcp->outf; |
| 1708 | if (cflag) { |
| 1709 | #ifdef LINUX |
| 1710 | tv_sub(&tcp->dtime, &ru.ru_stime, &tcp->stime); |
| 1711 | tcp->stime = ru.ru_stime; |
| 1712 | #endif /* !LINUX */ |
| 1713 | } |
| 1714 | |
| 1715 | if (tcp->flags & TCB_SUSPENDED) { |
| 1716 | /* |
| 1717 | * Apparently, doing any ptrace() call on a stopped |
| 1718 | * process, provokes the kernel to report the process |
| 1719 | * status again on a subsequent wait(), even if the |
| 1720 | * process has not been actually restarted. |
| 1721 | * Since we have inspected the arguments of suspended |
| 1722 | * processes we end up here testing for this case. |
| 1723 | */ |
| 1724 | continue; |
| 1725 | } |
| 1726 | if (WIFSIGNALED(status)) { |
| 1727 | if (!cflag |
| 1728 | && (qual_flags[WTERMSIG(status)] & QUAL_SIGNAL)) { |
| 1729 | printleader(tcp); |
| 1730 | tprintf("+++ killed by %s +++", |
Nate Sammons | ce780fc | 1999-03-29 23:23:13 +0000 | [diff] [blame] | 1731 | signame(WTERMSIG(status))); |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1732 | printtrailer(tcp); |
| 1733 | } |
| 1734 | droptcb(tcp); |
| 1735 | continue; |
| 1736 | } |
| 1737 | if (WIFEXITED(status)) { |
| 1738 | if (debug) |
| 1739 | fprintf(stderr, "pid %u exited\n", pid); |
| 1740 | if (tcp->flags & TCB_ATTACHED) |
| 1741 | fprintf(stderr, |
| 1742 | "PANIC: attached pid %u exited\n", |
| 1743 | pid); |
| 1744 | droptcb(tcp); |
| 1745 | continue; |
| 1746 | } |
| 1747 | if (!WIFSTOPPED(status)) { |
| 1748 | fprintf(stderr, "PANIC: pid %u not stopped\n", pid); |
| 1749 | droptcb(tcp); |
| 1750 | continue; |
| 1751 | } |
| 1752 | if (debug) |
| 1753 | fprintf(stderr, "pid %u stopped, [%s]\n", |
Nate Sammons | ce780fc | 1999-03-29 23:23:13 +0000 | [diff] [blame] | 1754 | pid, signame(WSTOPSIG(status))); |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1755 | |
| 1756 | if (tcp->flags & TCB_STARTUP) { |
| 1757 | /* |
| 1758 | * This flag is there to keep us in sync. |
| 1759 | * Next time this process stops it should |
| 1760 | * really be entering a system call. |
| 1761 | */ |
| 1762 | tcp->flags &= ~TCB_STARTUP; |
| 1763 | if (tcp->flags & TCB_ATTACHED) { |
| 1764 | /* |
| 1765 | * Interestingly, the process may stop |
| 1766 | * with STOPSIG equal to some other signal |
| 1767 | * than SIGSTOP if we happend to attach |
| 1768 | * just before the process takes a signal. |
| 1769 | */ |
| 1770 | if (!WIFSTOPPED(status)) { |
| 1771 | fprintf(stderr, |
| 1772 | "pid %u not stopped\n", pid); |
| 1773 | detach(tcp, WSTOPSIG(status)); |
| 1774 | continue; |
| 1775 | } |
| 1776 | } |
| 1777 | else { |
| 1778 | #ifdef SUNOS4 |
| 1779 | /* A child of us stopped at exec */ |
| 1780 | if (WSTOPSIG(status) == SIGTRAP && followvfork) |
| 1781 | fixvfork(tcp); |
| 1782 | #endif /* SUNOS4 */ |
| 1783 | } |
| 1784 | if (tcp->flags & TCB_BPTSET) { |
| 1785 | if (clearbpt(tcp) < 0) /* Pretty fatal */ { |
| 1786 | droptcb(tcp); |
| 1787 | cleanup(); |
| 1788 | return -1; |
| 1789 | } |
| 1790 | } |
| 1791 | goto tracing; |
| 1792 | } |
| 1793 | |
| 1794 | if (WSTOPSIG(status) != SIGTRAP) { |
| 1795 | if (WSTOPSIG(status) == SIGSTOP && |
| 1796 | (tcp->flags & TCB_SIGTRAPPED)) { |
| 1797 | /* |
| 1798 | * Trapped attempt to block SIGTRAP |
| 1799 | * Hope we are back in control now. |
| 1800 | */ |
| 1801 | tcp->flags &= ~(TCB_INSYSCALL | TCB_SIGTRAPPED); |
| 1802 | if (ptrace(PTRACE_SYSCALL, |
| 1803 | pid, (char *) 1, 0) < 0) { |
| 1804 | perror("trace: ptrace(PTRACE_SYSCALL, ...)"); |
| 1805 | cleanup(); |
| 1806 | return -1; |
| 1807 | } |
| 1808 | continue; |
| 1809 | } |
| 1810 | if (!cflag |
| 1811 | && (qual_flags[WSTOPSIG(status)] & QUAL_SIGNAL)) { |
Wichert Akkerman | 7b3346b | 2001-10-09 23:47:38 +0000 | [diff] [blame^] | 1812 | unsigned long addr = 0, pc = 0; |
| 1813 | #ifdef PT_GETSIGINFO |
| 1814 | # define PSR_RI 41 |
| 1815 | struct siginfo si; |
| 1816 | unsigned long psr; |
| 1817 | |
| 1818 | upeek(pid, PT_CR_IPSR, &psr); |
| 1819 | upeek(pid, PT_CR_IIP, &pc); |
| 1820 | |
| 1821 | pc += (psr >> PSR_RI) & 0x3; |
| 1822 | ptrace(PT_GETSIGINFO, pid, 0, (long) &si); |
| 1823 | addr = (unsigned long) si.si_addr; |
| 1824 | #endif |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1825 | printleader(tcp); |
Wichert Akkerman | 7b3346b | 2001-10-09 23:47:38 +0000 | [diff] [blame^] | 1826 | tprintf("--- %s (%s) @ %lx (%lx) ---", |
Nate Sammons | ce780fc | 1999-03-29 23:23:13 +0000 | [diff] [blame] | 1827 | signame(WSTOPSIG(status)), |
Wichert Akkerman | 7b3346b | 2001-10-09 23:47:38 +0000 | [diff] [blame^] | 1828 | strsignal(WSTOPSIG(status)), pc, addr); |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1829 | printtrailer(tcp); |
| 1830 | } |
| 1831 | if ((tcp->flags & TCB_ATTACHED) && |
| 1832 | !sigishandled(tcp, WSTOPSIG(status))) { |
| 1833 | detach(tcp, WSTOPSIG(status)); |
| 1834 | continue; |
| 1835 | } |
| 1836 | if (ptrace(PTRACE_SYSCALL, pid, (char *) 1, |
| 1837 | WSTOPSIG(status)) < 0) { |
| 1838 | perror("trace: ptrace(PTRACE_SYSCALL, ...)"); |
| 1839 | cleanup(); |
| 1840 | return -1; |
| 1841 | } |
| 1842 | tcp->flags &= ~TCB_SUSPENDED; |
| 1843 | continue; |
| 1844 | } |
| 1845 | if (trace_syscall(tcp) < 0) { |
| 1846 | if (tcp->flags & TCB_ATTACHED) |
| 1847 | detach(tcp, 0); |
| 1848 | else { |
| 1849 | ptrace(PTRACE_KILL, |
| 1850 | tcp->pid, (char *) 1, SIGTERM); |
| 1851 | droptcb(tcp); |
| 1852 | } |
| 1853 | continue; |
| 1854 | } |
| 1855 | if (tcp->flags & TCB_EXITING) { |
| 1856 | if (tcp->flags & TCB_ATTACHED) |
| 1857 | detach(tcp, 0); |
| 1858 | else if (ptrace(PTRACE_CONT, pid, (char *) 1, 0) < 0) { |
| 1859 | perror("strace: ptrace(PTRACE_CONT, ...)"); |
| 1860 | cleanup(); |
| 1861 | return -1; |
| 1862 | } |
| 1863 | continue; |
| 1864 | } |
| 1865 | if (tcp->flags & TCB_SUSPENDED) { |
| 1866 | if (!qflag) |
| 1867 | fprintf(stderr, "Process %u suspended\n", pid); |
| 1868 | continue; |
| 1869 | } |
| 1870 | tracing: |
| 1871 | if (ptrace(PTRACE_SYSCALL, pid, (char *) 1, 0) < 0) { |
| 1872 | perror("trace: ptrace(PTRACE_SYSCALL, ...)"); |
| 1873 | cleanup(); |
| 1874 | return -1; |
| 1875 | } |
| 1876 | } |
| 1877 | return 0; |
| 1878 | } |
| 1879 | |
Wichert Akkerman | bf79f2e | 2000-09-01 21:03:06 +0000 | [diff] [blame] | 1880 | #endif /* !USE_PROCFS */ |
Wichert Akkerman | 76baf7c | 1999-02-19 00:21:36 +0000 | [diff] [blame] | 1881 | |
| 1882 | static int curcol; |
| 1883 | |
| 1884 | #ifdef __STDC__ |
| 1885 | #include <stdarg.h> |
| 1886 | #define VA_START(a, b) va_start(a, b) |
| 1887 | #else |
| 1888 | #include <varargs.h> |
| 1889 | #define VA_START(a, b) va_start(a) |
| 1890 | #endif |
| 1891 | |
| 1892 | void |
| 1893 | #ifdef __STDC__ |
| 1894 | tprintf(const char *fmt, ...) |
| 1895 | #else |
| 1896 | tprintf(fmt, va_alist) |
| 1897 | char *fmt; |
| 1898 | va_dcl |
| 1899 | #endif |
| 1900 | { |
| 1901 | va_list args; |
| 1902 | |
| 1903 | VA_START(args, fmt); |
| 1904 | if (outf) |
| 1905 | curcol += vfprintf(outf, fmt, args); |
| 1906 | va_end(args); |
| 1907 | return; |
| 1908 | } |
| 1909 | |
| 1910 | void |
| 1911 | printleader(tcp) |
| 1912 | struct tcb *tcp; |
| 1913 | { |
| 1914 | if (tcp_last && (!outfname || followfork < 2 || tcp_last == tcp)) { |
| 1915 | tcp_last->flags |= TCB_REPRINT; |
| 1916 | tprintf(" <unfinished ...>\n"); |
| 1917 | } |
| 1918 | curcol = 0; |
| 1919 | if ((followfork == 1 || pflag_seen > 1) && outfname) |
| 1920 | tprintf("%-5d ", tcp->pid); |
| 1921 | else if (nprocs > 1 && !outfname) |
| 1922 | tprintf("[pid %5u] ", tcp->pid); |
| 1923 | if (tflag) { |
| 1924 | char str[sizeof("HH:MM:SS")]; |
| 1925 | struct timeval tv, dtv; |
| 1926 | static struct timeval otv; |
| 1927 | |
| 1928 | gettimeofday(&tv, NULL); |
| 1929 | if (rflag) { |
| 1930 | if (otv.tv_sec == 0) |
| 1931 | otv = tv; |
| 1932 | tv_sub(&dtv, &tv, &otv); |
| 1933 | tprintf("%6ld.%06ld ", |
| 1934 | (long) dtv.tv_sec, (long) dtv.tv_usec); |
| 1935 | otv = tv; |
| 1936 | } |
| 1937 | else if (tflag > 2) { |
| 1938 | tprintf("%ld.%06ld ", |
| 1939 | (long) tv.tv_sec, (long) tv.tv_usec); |
| 1940 | } |
| 1941 | else { |
| 1942 | time_t local = tv.tv_sec; |
| 1943 | strftime(str, sizeof(str), "%T", localtime(&local)); |
| 1944 | if (tflag > 1) |
| 1945 | tprintf("%s.%06ld ", str, (long) tv.tv_usec); |
| 1946 | else |
| 1947 | tprintf("%s ", str); |
| 1948 | } |
| 1949 | } |
| 1950 | if (iflag) |
| 1951 | printcall(tcp); |
| 1952 | } |
| 1953 | |
| 1954 | void |
| 1955 | tabto(col) |
| 1956 | int col; |
| 1957 | { |
| 1958 | if (curcol < col) |
| 1959 | tprintf("%*s", col - curcol, ""); |
| 1960 | } |
| 1961 | |
| 1962 | void |
| 1963 | printtrailer(tcp) |
| 1964 | struct tcb *tcp; |
| 1965 | { |
| 1966 | tprintf("\n"); |
| 1967 | tcp_last = NULL; |
| 1968 | } |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1969 | |
Wichert Akkerman | ea78f0f | 1999-11-29 15:34:02 +0000 | [diff] [blame] | 1970 | #ifdef HAVE_MP_PROCFS |
Wichert Akkerman | 9ce1a63 | 1999-08-29 23:15:07 +0000 | [diff] [blame] | 1971 | |
| 1972 | int mp_ioctl (int fd, int cmd, void *arg, int size) { |
| 1973 | |
| 1974 | struct iovec iov[2]; |
| 1975 | int n = 1; |
| 1976 | |
| 1977 | iov[0].iov_base = &cmd; |
| 1978 | iov[0].iov_len = sizeof cmd; |
| 1979 | if (arg) { |
| 1980 | ++n; |
| 1981 | iov[1].iov_base = arg; |
| 1982 | iov[1].iov_len = size; |
| 1983 | } |
| 1984 | |
| 1985 | return writev (fd, iov, n); |
| 1986 | } |
| 1987 | |
| 1988 | #endif |