compiler-rt/test/tsan/signal_thread2.cpp

   1 // RUN: %clangxx_tsan %s -o %t && %run %t 2>&1 | FileCheck %s
   2 // UNSUPPORTED: darwin
   3
   4 // FIXME: Very flaky on PPC with COMPILER_RT_DEBUG.
   5 // https://github.com/google/sanitizers/issues/1792
   6 // UNSUPPORTED: !compiler-rt-optimized && ppc
   7
   8 // Test case for https://github.com/google/sanitizers/issues/1540
   9
  10 #include <errno.h>
  11 #include <pthread.h>
  12 #include <signal.h>
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <sys/time.h>
  16 #include <sys/types.h>
  17 #include <unistd.h>
  18
  19 volatile int X;
  20
  21 static void handler(int sig) {
  22   (void)sig;
  23   if (X != 0)
  24     printf("bad");
  25 }
  26
  27 static void *thr1(void *p) {
  28   sleep(1);
  29   return 0;
  30 }
  31
  32 static void *thr(void *p) {
  33   pthread_t th[10];
  34   for (int i = 0; i < sizeof(th) / sizeof(th[0]); i++)
  35     pthread_create(&th[i], 0, thr1, 0);
  36   for (int i = 0; i < sizeof(th) / sizeof(th[0]); i++)
  37     pthread_join(th[i], 0);
  38   return 0;
  39 }
  40
  41 int main() {
  42   struct sigaction act = {};
  43   act.sa_handler = &handler;
  44   if (sigaction(SIGPROF, &act, 0)) {
  45     perror("sigaction");
  46     exit(1);
  47   }
  48
  49   itimerval t;
  50   t.it_value.tv_sec = 0;
  51   t.it_value.tv_usec = 10;
  52   t.it_interval = t.it_value;
  53   if (setitimer(ITIMER_PROF, &t, 0)) {
  54     perror("setitimer");
  55     exit(1);
  56   }
  57
  58   pthread_t th[100];
  59   for (int i = 0; i < sizeof(th) / sizeof(th[0]); i++)
  60     pthread_create(&th[i], 0, thr, 0);
  61   for (int i = 0; i < sizeof(th) / sizeof(th[0]); i++)
  62     pthread_join(th[i], 0);
  63
  64   fprintf(stderr, "DONE\n");
  65   return 0;
  66 }
  67
  68 // CHECK-NOT: WARNING: ThreadSanitizer:
  69 // CHECK: DONE
  70 // CHECK-NOT: WARNING: ThreadSanitizer: