compiler-rt/test/tsan/signal_write.cpp

   1 // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <signal.h>
   5 #include <string.h>
   6 #include <sys/types.h>
   7 #include <unistd.h>
   8
   9 static void handler(int, siginfo_t*, void*) {
  10   const char *str = "HELLO FROM SIGNAL\n";
  11   write(2, str, strlen(str));
  12 }
  13
  14 int main() {
  15   struct sigaction act = {};
  16   act.sa_sigaction = &handler;
  17   sigaction(SIGPROF, &act, 0);
  18   kill(getpid(), SIGPROF);
  19   sleep(1);  // let the signal handler run, can't use barrier in sig handler
  20   fprintf(stderr, "DONE\n");
  21   return 0;
  22 }
  23
  24 // CHECK-NOT: WARNING: ThreadSanitizer
  25 // CHECK: HELLO FROM SIGNAL
  26 // CHECK: DONE
  27