src/libcompiler_builtins/compiler-rt/test/msan/sigwait.cc

   1 // RUN: %clangxx_msan -std=c++11 -O0 -g %s -o %t && %run %t
   2 // RUN: %clangxx_msan -DPOSITIVE -std=c++11 -O0 -g %s -o %t && not %run %t 2>&1 | FileCheck %s
   3
   4 #include <assert.h>
   5 #include <signal.h>
   6 #include <sys/time.h>
   7 #include <unistd.h>
   8
   9 #include <sanitizer/msan_interface.h>
  10
  11 void test_sigwait() {
  12   sigset_t s;
  13 #ifndef POSITIVE
  14   sigemptyset(&s);
  15   sigaddset(&s, SIGUSR1);
  16 #endif
  17   sigprocmask(SIG_BLOCK, &s, 0);
  18   // CHECK:  MemorySanitizer: use-of-uninitialized-value
  19
  20   if (pid_t pid = fork()) {
  21     kill(pid, SIGUSR1);
  22     _exit(0);
  23   } else {
  24     int sig;
  25     int res = sigwait(&s, &sig);
  26     assert(!res);
  27     // The following checks that sig is initialized.
  28     assert(sig == SIGUSR1);
  29   }
  30 }
  31
  32 int main(void) {
  33   test_sigwait();
  34   return 0;
  35 }