compiler-rt/test/tsan/longjmp4.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 #include <string.h>
   8
   9 void bar(jmp_buf env) {
  10   volatile int x = 42;
  11   jmp_buf env2;
  12   memcpy(env2, env, sizeof(jmp_buf));
  13   longjmp(env2, 42);
  14   x++;
  15 }
  16
  17 void foo(jmp_buf env) {
  18   volatile int x = 42;
  19   bar(env);
  20   x++;
  21 }
  22
  23 __attribute__((noinline)) void badguy() {
  24   pthread_mutex_t mtx;
  25   pthread_mutex_init(&mtx, 0);
  26   pthread_mutex_lock(&mtx);
  27   pthread_mutex_destroy(&mtx);
  28 }
  29
  30 __attribute__((noinline)) void mymain() {
  31   jmp_buf env;
  32   if (setjmp(env) == 42) {
  33     badguy();
  34     return;
  35   }
  36   foo(env);
  37   fprintf(stderr, "FAILED\n");
  38 }
  39
  40 int main() {
  41   volatile int x = 42;
  42   mymain();
  43   return x;
  44 }
  45
  46 // CHECK-NOT: FAILED
  47 // CHECK: WARNING: ThreadSanitizer: destroy of a locked mutex
  48 // CHECK:   #0 pthread_mutex_destroy
  49 // CHECK:   #1 badguy
  50 // CHECK:   #2 mymain
  51 // CHECK:   #3 main
  52