test/tsan/longjmp4.cc

   1 // RUN: %clang_tsan -O1 %s -o %t && not %t 2>&1 | FileCheck %s
   2 #include <pthread.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <setjmp.h>
   6 #include <string.h>
   7
   8 void bar(jmp_buf env) {
   9   volatile int x = 42;
  10   jmp_buf env2;
  11   memcpy(env2, env, sizeof(jmp_buf));
  12   longjmp(env2, 42);
  13   x++;
  14 }
  15
  16 void foo(jmp_buf env) {
  17   volatile int x = 42;
  18   bar(env);
  19   x++;
  20 }
  21
  22 void badguy() {
  23   pthread_mutex_t mtx;
  24   pthread_mutex_init(&mtx, 0);
  25   pthread_mutex_lock(&mtx);
  26   pthread_mutex_destroy(&mtx);
  27 }
  28
  29 void mymain() {
  30   jmp_buf env;
  31   if (setjmp(env) == 42) {
  32     badguy();
  33     return;
  34   }
  35   foo(env);
  36   printf("FAILED\n");
  37 }
  38
  39 int main() {
  40   volatile int x = 42;
  41   mymain();
  42   return x;
  43 }
  44
  45 // CHECK-NOT: FAILED
  46 // CHECK: WARNING: ThreadSanitizer: destroy of a locked mutex
  47 // CHECK:   #0 pthread_mutex_destroy
  48 // CHECK:   #1 badguy
  49 // CHECK:   #2 mymain
  50 // CHECK:   #3 main
  51