compiler-rt/test/tsan/java_lock_rec_race.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
   2 #include "java.h"
   3
   4 jptr varaddr;
   5 jptr lockaddr;
   6
   7 void *Thread(void *p) {
   8   __tsan_java_mutex_lock(lockaddr);
   9   __tsan_java_mutex_lock(lockaddr);
  10   __tsan_java_mutex_lock(lockaddr);
  11   int rec = __tsan_java_mutex_unlock_rec(lockaddr);
  12   if (rec != 3) {
  13     fprintf(stderr, "FAILED 0 rec=%d\n", rec);
  14     exit(1);
  15   }
  16   *(int*)varaddr = 42;
  17   barrier_wait(&barrier);
  18   barrier_wait(&barrier);
  19   __tsan_java_mutex_lock_rec(lockaddr, rec);
  20   __tsan_java_mutex_unlock(lockaddr);
  21   __tsan_java_mutex_unlock(lockaddr);
  22   __tsan_java_mutex_unlock(lockaddr);
  23   return 0;
  24 }
  25
  26 int main() {
  27   barrier_init(&barrier, 2);
  28   int const kHeapSize = 1024 * 1024;
  29   jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
  30   __tsan_java_init(jheap, kHeapSize);
  31   const int kBlockSize = 16;
  32   __tsan_java_alloc(jheap, kBlockSize);
  33   varaddr = jheap;
  34   *(int*)varaddr = 0;
  35   lockaddr = jheap + 8;
  36   pthread_t th;
  37   pthread_create(&th, 0, Thread, 0);
  38   barrier_wait(&barrier);
  39   __tsan_java_mutex_lock(lockaddr);
  40   *(int*)varaddr = 43;
  41   __tsan_java_mutex_unlock(lockaddr);
  42   barrier_wait(&barrier);
  43   pthread_join(th, 0);
  44   __tsan_java_free(jheap, kBlockSize);
  45   fprintf(stderr, "DONE\n");
  46   return __tsan_java_fini();
  47 }
  48
  49 // CHECK: WARNING: ThreadSanitizer: data race
  50 // CHECK-NOT: FAILED
  51 // CHECK: DONE