compiler-rt/test/tsan/longjmp3.cpp

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