compiler-rt/test/tsan/signal_malloc.cpp

   1 // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
   2 #include "test.h"
   3 #include <signal.h>
   4 #include <sys/types.h>
   5
   6 static void handler(int, siginfo_t*, void*) {
   7   // CHECK: WARNING: ThreadSanitizer: signal-unsafe call inside of a signal
   8   // CHECK:     #0 malloc
   9   // CHECK:     #{{(1|2)}} handler(int, {{(__)?}}siginfo{{(_t)?}}*, void*) {{.*}}signal_malloc.cpp:[[@LINE+2]]
  10   // CHECK: SUMMARY: ThreadSanitizer: signal-unsafe call inside of a signal{{.*}}handler
  11   volatile char *p = (char*)malloc(1);
  12   p[0] = 0;
  13   // CHECK: WARNING: ThreadSanitizer: signal-unsafe call inside of a signal
  14   // CHECK:     #0 free
  15   // CHECK:     #{{(1|2)}} handler(int, {{(__)?}}siginfo{{(_t)?}}*, void*) {{.*}}signal_malloc.cpp:[[@LINE+2]]
  16   // CHECK: SUMMARY: ThreadSanitizer: signal-unsafe call inside of a signal{{.*}}handler
  17   free((void*)p);
  18 }
  19
  20 int main() {
  21   struct sigaction act = {};
  22   act.sa_sigaction = &handler;
  23   sigaction(SIGPROF, &act, 0);
  24   kill(getpid(), SIGPROF);
  25   sleep(1);  // let the signal handler run
  26   fprintf(stderr, "DONE\n");
  27   // CHECK: DONE
  28   return 0;
  29 }
  30