src/compiler-rt/test/tsan/mutex_cycle2.c

   1 // RUN: %clangxx_tsan %s -o %t
   2 // RUN:                                 not %run %t 2>&1 | FileCheck %s
   3 // RUN: TSAN_OPTIONS=detect_deadlocks=1 not %run %t 2>&1 | FileCheck %s
   4 // RUN: TSAN_OPTIONS=detect_deadlocks=0     %run %t 2>&1 | FileCheck %s --check-prefix=DISABLED
   5 // RUN: echo "deadlock:main" > %t.supp
   6 // RUN: TSAN_OPTIONS="suppressions='%t.supp'" %run %t 2>&1 | FileCheck %s --check-prefix=DISABLED
   7 // RUN: echo "deadlock:zzzz" > %t.supp
   8 // RUN: TSAN_OPTIONS="suppressions='%t.supp'" not %run %t 2>&1 | FileCheck %s
   9 #include <pthread.h>
  10 #include <stdio.h>
  11
  12 int main() {
  13   pthread_mutex_t mu1, mu2;
  14   pthread_mutex_init(&mu1, NULL);
  15   pthread_mutex_init(&mu2, NULL);
  16
  17   // mu1 => mu2
  18   pthread_mutex_lock(&mu1);
  19   pthread_mutex_lock(&mu2);
  20   pthread_mutex_unlock(&mu2);
  21   pthread_mutex_unlock(&mu1);
  22
  23   // mu2 => mu1
  24   pthread_mutex_lock(&mu2);
  25   pthread_mutex_lock(&mu1);
  26   // CHECK: ThreadSanitizer: lock-order-inversion (potential deadlock)
  27   // DISABLED-NOT: ThreadSanitizer
  28   // DISABLED: PASS
  29   pthread_mutex_unlock(&mu1);
  30   pthread_mutex_unlock(&mu2);
  31
  32   pthread_mutex_destroy(&mu1);
  33   pthread_mutex_destroy(&mu2);
  34   fprintf(stderr, "PASS\n");
  35 }