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 
31