test/tsan/longjmp3.cc

   1 // RUN: %clang_tsan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
   2 #include <pthread.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <setjmp.h>
   6
   7 void bar(jmp_buf env) {
   8   volatile int x = 42;
   9   longjmp(env, 42);
  10   x++;
  11 }
  12
  13 void foo(jmp_buf env) {
  14   volatile int x = 42;
  15   bar(env);
  16   x++;
  17 }
  18
  19 void badguy() {
  20   pthread_mutex_t mtx;
  21   pthread_mutex_init(&mtx, 0);
  22   pthread_mutex_lock(&mtx);
  23   pthread_mutex_destroy(&mtx);
  24 }
  25
  26 void mymain() {
  27   jmp_buf env;
  28   if (setjmp(env) == 42) {
  29     badguy();
  30     return;
  31   }
  32   foo(env);
  33   printf("FAILED\n");
  34 }
  35
  36 int main() {
  37   volatile int x = 42;
  38   mymain();
  39   return x;
  40 }
  41
  42 // CHECK-NOT: FAILED
  43 // CHECK: WARNING: ThreadSanitizer: destroy of a locked mutex
  44 // CHECK:   #0 pthread_mutex_destroy
  45 // CHECK:   #1 badguy
  46 // CHECK:   #2 mymain
  47 // CHECK:   #3 main
  48