granicus.if.org Git - strace/blob - tests/ptrace.c

   1 /*
   2  * Check decoding of ptrace syscall.
   3  *
   4  * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include "tests.h"
  31 #include <sys/syscall.h>
  32
  33 #ifdef __NR_rt_sigprocmask
  34
  35 # include <errno.h>
  36 # include <signal.h>
  37 # include <stdio.h>
  38 # include <string.h>
  39 # include <sys/wait.h>
  40 # include <unistd.h>
  41 # include "ptrace.h"
  42 # include <linux/audit.h>
  43
  44 static long
  45 do_ptrace(unsigned long request, unsigned long pid,
  46           unsigned long addr, unsigned long data)
  47 {
  48         return syscall(__NR_ptrace, request, pid, addr, data);
  49 }
  50
  51 static void
  52 test_peeksiginfo(unsigned long pid, const unsigned long bad_request)
  53 {
  54         long rc = do_ptrace(PTRACE_PEEKSIGINFO, pid, 0, bad_request);
  55         printf("ptrace(PTRACE_PEEKSIGINFO, %u, NULL, %#lx)"
  56                " = %ld %s (%m)\n", (unsigned) pid, bad_request, rc, errno2name());
  57
  58         struct {
  59                 unsigned long long off;
  60                 unsigned int flags, nr;
  61         } *const psi = tail_alloc(sizeof(*psi));
  62
  63         psi->off = 0xdeadbeeffacefeed;
  64         psi->flags = 1;
  65         psi->nr = 42;
  66
  67         rc = do_ptrace(PTRACE_PEEKSIGINFO,
  68                        pid, (unsigned long) psi, bad_request);
  69         printf("ptrace(PTRACE_PEEKSIGINFO, %u, {off=%llu"
  70                ", flags=PTRACE_PEEKSIGINFO_SHARED, nr=%u}, %#lx)"
  71                " = %ld %s (%m)\n",
  72                (unsigned) pid, psi->off, psi->nr, bad_request, rc, errno2name());
  73
  74         pid = fork();
  75         if (pid < 0)
  76                 perror_msg_and_fail("fork");
  77
  78         if (!pid) {
  79                 sigset_t mask;
  80                 sigemptyset(&mask);
  81                 sigaddset(&mask, SIGUSR1);
  82                 sigaddset(&mask, SIGUSR2);
  83                 sigaddset(&mask, SIGALRM);
  84
  85                 if (sigprocmask(SIG_BLOCK, &mask, NULL))
  86                         perror_msg_and_fail("sigprocmask");
  87
  88                 raise(SIGUSR1);
  89                 raise(SIGUSR2);
  90                 raise(SIGALRM);
  91
  92                 if (do_ptrace(PTRACE_TRACEME, 0, 0, 0))
  93                         perror_msg_and_fail("child: PTRACE_TRACEME");
  94
  95                 raise(SIGSTOP);
  96                 _exit(0);
  97         }
  98
  99         const unsigned int nsigs = 4;
 100         const uid_t uid = geteuid();
 101         siginfo_t *sigs = tail_alloc(sizeof(*sigs) * nsigs);
 102
 103         psi->off = 0;
 104         psi->flags = 0;
 105         psi->nr = nsigs;
 106
 107         for (;;) {
 108                 int status, tracee, saved;
 109
 110                 errno = 0;
 111                 tracee = wait(&status);
 112                 if (tracee <= 0) {
 113                         if (errno == EINTR)
 114                                 continue;
 115                         saved = errno;
 116                         kill (pid, SIGKILL);
 117                         errno = saved;
 118                         perror_msg_and_fail("wait");
 119                 }
 120                 if (WIFEXITED(status)) {
 121                         if (WEXITSTATUS(status) == 0)
 122                                 break;
 123                         error_msg_and_fail("unexpected exit status %u",
 124                                            WEXITSTATUS(status));
 125                 }
 126                 if (WIFSIGNALED(status))
 127                         error_msg_and_fail("unexpected signal %u",
 128                                            WTERMSIG(status));
 129                 if (!WIFSTOPPED(status) || WSTOPSIG(status) != SIGSTOP) {
 130                         kill(pid, SIGKILL);
 131                         error_msg_and_fail("unexpected wait status %x",
 132                                            status);
 133                 }
 134
 135                 rc = do_ptrace(PTRACE_PEEKSIGINFO, pid,
 136                                (unsigned long) psi, (unsigned long) sigs);
 137                 if (rc < 0) {
 138                         printf("ptrace(PTRACE_PEEKSIGINFO, %u, {off=%llu"
 139                                ", flags=0, nr=%u}, %p) = %ld %s (%m)\n",
 140                                (unsigned) pid, psi->off, psi->nr, sigs,
 141                                rc, errno2name());
 142                 } else {
 143                         printf("ptrace(PTRACE_PEEKSIGINFO, %u, {off=%llu"
 144                                ", flags=0, nr=%u}"
 145                                ", [{si_signo=SIGUSR1, si_code=SI_TKILL"
 146                                ", si_pid=%u, si_uid=%u}"
 147                                ", {si_signo=SIGUSR2, si_code=SI_TKILL"
 148                                ", si_pid=%u, si_uid=%u}"
 149                                ", {si_signo=SIGALRM, si_code=SI_TKILL"
 150                                ", si_pid=%u, si_uid=%u}"
 151                                "]) = %ld\n",
 152                                (unsigned) pid, psi->off, psi->nr,
 153                                (unsigned) pid, (unsigned) uid,
 154                                (unsigned) pid, (unsigned) uid,
 155                                (unsigned) pid, (unsigned) uid,
 156                                rc);
 157                 }
 158
 159                 if (do_ptrace(PTRACE_CONT, pid, 0, 0)) {
 160                         saved = errno;
 161                         kill (pid, SIGKILL);
 162                         errno = saved;
 163                         perror_msg_and_fail("ptrace");
 164                 }
 165                 printf("ptrace(PTRACE_CONT, %ld, NULL, SIG_0) = 0\n", pid);
 166         }
 167 }
 168
 169 int
 170 main(void)
 171 {
 172         const unsigned long bad_request =
 173                 (unsigned long) 0xdeadbeeffffffeed;
 174         const unsigned long bad_data =
 175                 (unsigned long) 0xdeadcafefffff00d;
 176         const unsigned long pid =
 177                 (unsigned long) 0xdefaced00000000 | (unsigned) getpid();
 178
 179         unsigned int sigset_size;
 180
 181         for (sigset_size = 1024 / 8; sigset_size; sigset_size >>= 1) {
 182                 if (!syscall(__NR_rt_sigprocmask,
 183                              SIG_SETMASK, NULL, NULL, sigset_size))
 184                         break;
 185         }
 186         if (!sigset_size)
 187                 perror_msg_and_fail("rt_sigprocmask");
 188
 189         void *const k_set = tail_alloc(sigset_size);
 190         siginfo_t *const sip = tail_alloc(sizeof(*sip));
 191
 192         long rc = do_ptrace(bad_request, pid, 0, 0);
 193         printf("ptrace(%#lx /* PTRACE_??? */, %u, NULL, NULL) = %ld %s (%m)\n",
 194                bad_request, (unsigned) pid, rc, errno2name());
 195
 196         rc = do_ptrace(PTRACE_PEEKDATA, pid, bad_request, bad_data);
 197 # ifdef IA64
 198         printf("ptrace(PTRACE_PEEKDATA, %u, %#lx)"
 199                " = %ld %s (%m)\n",
 200                (unsigned) pid, bad_request, rc, errno2name());
 201 # else
 202         printf("ptrace(PTRACE_PEEKDATA, %u, %#lx, %#lx)"
 203                " = %ld %s (%m)\n",
 204                (unsigned) pid, bad_request, bad_data, rc, errno2name());
 205 #endif
 206
 207         rc = do_ptrace(PTRACE_PEEKTEXT, pid, bad_request, bad_data);
 208 # ifdef IA64
 209         printf("ptrace(PTRACE_PEEKTEXT, %u, %#lx)"
 210                " = %ld %s (%m)\n",
 211                (unsigned) pid, bad_request, rc, errno2name());
 212 # else
 213         printf("ptrace(PTRACE_PEEKTEXT, %u, %#lx, %#lx)"
 214                " = %ld %s (%m)\n",
 215                (unsigned) pid, bad_request, bad_data, rc, errno2name());
 216 #endif
 217
 218         rc = do_ptrace(PTRACE_PEEKUSER, pid, bad_request, bad_data);
 219 # ifdef IA64
 220         printf("ptrace(PTRACE_PEEKUSER, %u, %#lx)"
 221                " = %ld %s (%m)\n",
 222                (unsigned) pid, bad_request, rc, errno2name());
 223 # else
 224         printf("ptrace(PTRACE_PEEKUSER, %u, %#lx, %#lx)"
 225                " = %ld %s (%m)\n",
 226                (unsigned) pid, bad_request, bad_data, rc, errno2name());
 227 #endif
 228
 229         rc = do_ptrace(PTRACE_POKEUSER, pid, bad_request, bad_data);
 230         printf("ptrace(PTRACE_POKEUSER, %u, %#lx, %#lx)"
 231                " = %ld %s (%m)\n",
 232                (unsigned) pid, bad_request, bad_data, rc, errno2name());
 233
 234         rc = do_ptrace(PTRACE_ATTACH, pid, 0, 0);
 235         printf("ptrace(PTRACE_ATTACH, %u) = %ld %s (%m)\n",
 236                (unsigned) pid, rc, errno2name());
 237
 238         rc = do_ptrace(PTRACE_INTERRUPT, pid, 0, 0);
 239         printf("ptrace(PTRACE_INTERRUPT, %u) = %ld %s (%m)\n",
 240                (unsigned) pid, rc, errno2name());
 241
 242         rc = do_ptrace(PTRACE_KILL, pid, 0, 0);
 243         printf("ptrace(PTRACE_KILL, %u) = %ld %s (%m)\n",
 244                (unsigned) pid, rc, errno2name());
 245
 246         rc = do_ptrace(PTRACE_LISTEN, pid, 0, 0);
 247         printf("ptrace(PTRACE_LISTEN, %u) = %ld %s (%m)\n",
 248                (unsigned) pid, rc, errno2name());
 249
 250         sigset_t libc_set;
 251         sigemptyset(&libc_set);
 252         sigaddset(&libc_set, SIGUSR1);
 253         memcpy(k_set, &libc_set, sigset_size);
 254
 255         rc = do_ptrace(PTRACE_SETSIGMASK,
 256                        pid, sigset_size, (unsigned long) k_set);
 257         printf("ptrace(PTRACE_SETSIGMASK, %u, %u, [USR1])"
 258                " = %ld %s (%m)\n",
 259                (unsigned) pid, sigset_size, rc, errno2name());
 260
 261         rc = do_ptrace(PTRACE_GETSIGMASK,
 262                        pid, sigset_size, (unsigned long) k_set);
 263         printf("ptrace(PTRACE_GETSIGMASK, %u, %u, %p)"
 264                " = %ld %s (%m)\n",
 265                (unsigned) pid, sigset_size, k_set, rc, errno2name());
 266
 267         rc = do_ptrace(PTRACE_SECCOMP_GET_FILTER, pid, 42, 0);
 268         printf("ptrace(PTRACE_SECCOMP_GET_FILTER, %u, 42, NULL)"
 269                " = %ld %s (%m)\n", (unsigned) pid, rc, errno2name());
 270
 271         rc = do_ptrace(PTRACE_GETEVENTMSG, pid, bad_request, bad_data);
 272         printf("ptrace(PTRACE_GETEVENTMSG, %u, %#lx, %#lx)"
 273                " = %ld %s (%m)\n",
 274                (unsigned) pid, bad_request, bad_data, rc, errno2name());
 275
 276         memset(sip, -1, sizeof(*sip));
 277         sip->si_signo = SIGIO;
 278         sip->si_code = 1;
 279         sip->si_errno = ENOENT;
 280         sip->si_band = -2;
 281
 282         rc = do_ptrace(PTRACE_SETSIGINFO,
 283                        pid, bad_request, (unsigned long) sip);
 284         printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGIO"
 285                ", si_code=POLL_IN, si_errno=ENOENT, si_band=-2})"
 286                " = %ld %s (%m)\n",
 287                (unsigned) pid, bad_request, rc, errno2name());
 288
 289         memset(sip, -1, sizeof(*sip));
 290         sip->si_signo = SIGTRAP;
 291         sip->si_code = 1;
 292         sip->si_errno = ENOENT;
 293         sip->si_pid = 2;
 294         sip->si_uid = 3;
 295         sip->si_ptr = (void *) bad_request;
 296
 297         rc = do_ptrace(PTRACE_SETSIGINFO,
 298                        pid, bad_request, (unsigned long) sip);
 299         printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGTRAP"
 300                ", si_code=TRAP_BRKPT, si_errno=ENOENT, si_pid=2, si_uid=3"
 301                ", si_value={int=%d, ptr=%p}}) = %ld %s (%m)\n",
 302                (unsigned) pid, bad_request, sip->si_int, sip->si_ptr, rc, errno2name());
 303
 304         memset(sip, -1, sizeof(*sip));
 305         sip->si_signo = SIGILL;
 306         sip->si_code = 1;
 307         sip->si_errno = ENOENT;
 308         sip->si_addr = (void *) (unsigned long) 0xfacefeeddeadbeef;
 309
 310         rc = do_ptrace(PTRACE_SETSIGINFO,
 311                        pid, bad_request, (unsigned long) sip);
 312         printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGILL"
 313                ", si_code=ILL_ILLOPC, si_errno=ENOENT, si_addr=%p})"
 314                " = %ld %s (%m)\n",
 315                (unsigned) pid, bad_request, sip->si_addr, rc, errno2name());
 316
 317         memset(sip, -1, sizeof(*sip));
 318         sip->si_signo = SIGFPE;
 319         sip->si_code = 1;
 320         sip->si_errno = ENOENT;
 321         sip->si_addr = (void *) (unsigned long) 0xfacefeeddeadbeef;
 322
 323         rc = do_ptrace(PTRACE_SETSIGINFO,
 324                        pid, bad_request, (unsigned long) sip);
 325         printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGFPE"
 326                ", si_code=FPE_INTDIV, si_errno=ENOENT, si_addr=%p})"
 327                " = %ld %s (%m)\n",
 328                (unsigned) pid, bad_request, sip->si_addr, rc, errno2name());
 329
 330         memset(sip, -1, sizeof(*sip));
 331         sip->si_signo = SIGBUS;
 332         sip->si_code = 1;
 333         sip->si_errno = -2;
 334         sip->si_addr = (void *) (unsigned long) 0xfacefeeddeadbeef;
 335
 336         rc = do_ptrace(PTRACE_SETSIGINFO,
 337                        pid, bad_request, (unsigned long) sip);
 338         printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGBUS"
 339                ", si_code=BUS_ADRALN, si_errno=%d, si_addr=%p})"
 340                " = %ld %s (%m)\n",
 341                (unsigned) pid, bad_request, sip->si_errno, sip->si_addr,
 342                rc, errno2name());
 343
 344         memset(sip, -1, sizeof(*sip));
 345         sip->si_signo = SIGPROF;
 346         sip->si_code = 0xbadc0ded;
 347         sip->si_errno = -2;
 348         sip->si_pid = 0;
 349         sip->si_uid = 3;
 350         sip->si_ptr = 0;
 351
 352         rc = do_ptrace(PTRACE_SETSIGINFO,
 353                        pid, bad_request, (unsigned long) sip);
 354         printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGPROF"
 355                ", si_code=%#x, si_errno=%d, si_pid=0, si_uid=3})"
 356                " = %ld %s (%m)\n",
 357                (unsigned) pid, bad_request, sip->si_code, sip->si_errno,
 358                rc, errno2name());
 359
 360 #ifdef HAVE_SIGINFO_T_SI_SYSCALL
 361         memset(sip, -1, sizeof(*sip));
 362         sip->si_signo = SIGSYS;
 363         sip->si_code = 1;
 364         sip->si_errno = ENOENT;
 365         sip->si_call_addr = (void *) (unsigned long) 0xfacefeeddeadbeef;
 366         sip->si_syscall = -1U;
 367         sip->si_arch = AUDIT_ARCH_X86_64;
 368
 369         rc = do_ptrace(PTRACE_SETSIGINFO,
 370                        pid, bad_request, (unsigned long) sip);
 371         printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGSYS"
 372                ", si_code=SYS_SECCOMP, si_errno=ENOENT, si_call_addr=%p"
 373                ", si_syscall=__NR_syscall_%u, si_arch=AUDIT_ARCH_X86_64})"
 374                " = %ld %s (%m)\n",
 375                (unsigned) pid, bad_request, sip->si_call_addr, sip->si_syscall,
 376                rc, errno2name());
 377 #endif
 378
 379 #if defined HAVE_SIGINFO_T_SI_TIMERID && defined HAVE_SIGINFO_T_SI_OVERRUN
 380         memset(sip, -1, sizeof(*sip));
 381         sip->si_signo = SIGHUP;
 382         sip->si_code = SI_TIMER;
 383         sip->si_errno = ENOENT;
 384         sip->si_timerid = 0xdeadbeef;
 385         sip->si_overrun = -1;
 386         sip->si_ptr = (void *) (unsigned long) 0xfacefeeddeadbeef;
 387
 388         rc = do_ptrace(PTRACE_SETSIGINFO,
 389                        pid, bad_request, (unsigned long) sip);
 390         printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGHUP"
 391                ", si_code=SI_TIMER, si_errno=ENOENT, si_timerid=%#x"
 392                ", si_overrun=%d, si_value={int=%d, ptr=%p}}) = %ld %s (%m)\n",
 393                (unsigned) pid, bad_request, sip->si_timerid, sip->si_overrun,
 394                sip->si_int, sip->si_ptr, rc, errno2name());
 395 #endif
 396
 397         rc = do_ptrace(PTRACE_GETSIGINFO,
 398                        pid, bad_request, (unsigned long) sip);
 399         printf("ptrace(PTRACE_GETSIGINFO, %u, %#lx, %p)"
 400                " = %ld %s (%m)\n", (unsigned) pid, bad_request, sip, rc, errno2name());
 401
 402         rc = do_ptrace(PTRACE_CONT, pid, 0, SIGUSR1);
 403         printf("ptrace(PTRACE_CONT, %u, NULL, SIGUSR1) = %ld %s (%m)\n",
 404                (unsigned) pid, rc, errno2name());
 405
 406         rc = do_ptrace(PTRACE_DETACH, pid, 0, SIGUSR2);
 407         printf("ptrace(PTRACE_DETACH, %u, NULL, SIGUSR2) = %ld %s (%m)\n",
 408                (unsigned) pid, rc, errno2name());
 409
 410         rc = do_ptrace(PTRACE_SYSCALL, pid, 0, SIGUSR1);
 411         printf("ptrace(PTRACE_SYSCALL, %u, NULL, SIGUSR1) = %ld %s (%m)\n",
 412                (unsigned) pid, rc, errno2name());
 413
 414 #ifdef PTRACE_SINGLESTEP
 415         rc = do_ptrace(PTRACE_SINGLESTEP, pid, 0, SIGUSR2);
 416         printf("ptrace(PTRACE_SINGLESTEP, %u, NULL, SIGUSR2) = %ld %s (%m)\n",
 417                (unsigned) pid, rc, errno2name());
 418 #endif
 419
 420 #ifdef PTRACE_SINGLEBLOCK
 421         rc = do_ptrace(PTRACE_SINGLEBLOCK, pid, 0, SIGUSR1);
 422         printf("ptrace(PTRACE_SINGLEBLOCK, %u, NULL, SIGUSR1) = %ld %s (%m)\n",
 423                (unsigned) pid, rc, errno2name());
 424 #endif
 425
 426 #ifdef PTRACE_SYSEMU
 427         rc = do_ptrace(PTRACE_SYSEMU, pid, 0, SIGUSR2);
 428         printf("ptrace(PTRACE_SYSEMU, %u, NULL, SIGUSR2) = %ld %s (%m)\n",
 429                (unsigned) pid, rc, errno2name());
 430 #endif
 431 #ifdef PTRACE_SYSEMU_SINGLESTEP
 432         rc = do_ptrace(PTRACE_SYSEMU_SINGLESTEP, pid, 0, SIGUSR1);
 433         printf("ptrace(PTRACE_SYSEMU_SINGLESTEP, %u, NULL, SIGUSR1)"
 434                " = %ld %s (%m)\n", (unsigned) pid, rc, errno2name());
 435 #endif
 436
 437         rc = do_ptrace(PTRACE_SETOPTIONS,
 438                        pid, 0, PTRACE_O_TRACEFORK|PTRACE_O_TRACECLONE);
 439         printf("ptrace(PTRACE_SETOPTIONS, %u, NULL"
 440                ", PTRACE_O_TRACEFORK|PTRACE_O_TRACECLONE) = %ld %s (%m)\n",
 441                (unsigned) pid, rc, errno2name());
 442
 443         rc = do_ptrace(PTRACE_SEIZE,
 444                        pid, bad_request, PTRACE_O_TRACESYSGOOD);
 445         printf("ptrace(PTRACE_SEIZE, %u, %#lx"
 446                ", PTRACE_O_TRACESYSGOOD) = %ld %s (%m)\n",
 447                (unsigned) pid, bad_request, rc, errno2name());
 448
 449         rc = do_ptrace(PTRACE_SETREGSET, pid, 1, bad_request);
 450         printf("ptrace(PTRACE_SETREGSET, %u, NT_PRSTATUS, %#lx)"
 451                " = %ld %s (%m)\n",
 452                (unsigned) pid, bad_request, rc, errno2name());
 453
 454         rc = do_ptrace(PTRACE_GETREGSET, pid, 3, bad_request);
 455         printf("ptrace(PTRACE_GETREGSET, %u, NT_PRPSINFO, %#lx)"
 456                " = %ld %s (%m)\n",
 457                (unsigned) pid, bad_request, rc, errno2name());
 458
 459         test_peeksiginfo(pid, bad_request);
 460
 461         rc = do_ptrace(PTRACE_TRACEME, 0, 0, 0);
 462         if (rc)
 463                 printf("ptrace(PTRACE_TRACEME) = %ld %s (%m)\n",
 464                        rc, errno2name());
 465         else
 466                 printf("ptrace(PTRACE_TRACEME) = 0\n");
 467
 468         puts("+++ exited with 0 +++");
 469         return 0;
 470 }
 471
 472
 473 #else
 474
 475 SKIP_MAIN_UNDEFINED("__NR_rt_sigprocmask")
 476
 477 #endif