tests/setrlimit_sigsegv.c

   1 #include "darwintest_defaults.h"
   2 #include <spawn.h>
   3 #include <unistd.h>
   4 #include <stdlib.h>
   5 #include <sys/resource.h>
   6
   7
   8 extern char **environ;
   9
  10 T_DECL(setrlimit_overflow_segfault,
  11                 "sigsegv is sent when stack(limit set with setrlimit) is fully used.",
  12                 T_META_IGNORECRASHES(".*stackoverflow_crash.*"),
  13                 T_META_CHECK_LEAKS(NO),
  14                 T_META_ALL_VALID_ARCHS(YES),
  15                 T_META_ASROOT(YES))
  16 {
  17         pid_t child_pid = 0;
  18         int rv = 0;
  19
  20         struct rlimit lim, save;
  21         T_ASSERT_POSIX_SUCCESS(getrlimit(RLIMIT_STACK, &save), NULL);
  22         T_ASSERT_POSIX_SUCCESS(getrlimit(RLIMIT_STACK, &lim), NULL);
  23         T_LOG("parent: stack limits cur=%llx max=%llx", lim.rlim_cur, lim.rlim_max);
  24         lim.rlim_cur = lim.rlim_cur/8;
  25         T_ASSERT_POSIX_SUCCESS(setrlimit(RLIMIT_STACK, &lim), NULL);
  26         int status = 0;
  27         int exit_signal = 0;
  28
  29         char *crash_cmd[] = { "./assets/stackoverflow_crash", NULL };
  30         posix_spawn_file_actions_t fact;
  31         posix_spawn_file_actions_init(&fact);
  32         T_ASSERT_POSIX_SUCCESS(posix_spawn_file_actions_addinherit_np(&fact, STDIN_FILENO), NULL);
  33         T_ASSERT_POSIX_SUCCESS(posix_spawn_file_actions_addinherit_np(&fact, STDOUT_FILENO), NULL);
  34         T_ASSERT_POSIX_SUCCESS(posix_spawn_file_actions_addinherit_np(&fact, STDERR_FILENO), NULL);
  35         T_LOG("spawning %s", crash_cmd[0]);
  36         rv = posix_spawn(&child_pid, crash_cmd[0], &fact, NULL, crash_cmd, environ);
  37         T_ASSERT_POSIX_SUCCESS(rv, "spawning the stackoverflow program");
  38
  39         T_LOG("parent: waiting for child process with pid %d", child_pid);
  40         wait(&status);
  41         T_LOG("parent: child process exited. status=%d", WEXITSTATUS(status));
  42
  43
  44         T_ASSERT_POSIX_SUCCESS(setrlimit(RLIMIT_STACK, &save), "Restore original limtis");
  45         posix_spawn_file_actions_destroy(&fact);
  46
  47         T_ASSERT_TRUE(WIFSIGNALED(status), "child exit with a signal");
  48         exit_signal = WTERMSIG(status);
  49         T_ASSERT_EQ(exit_signal, SIGSEGV, "child should receive SIGSEGV");
  50
  51         return;
  52 }