compiler-rt/test/tsan/java_lock_rec.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %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   *(int*)varaddr = 42;
  11   int rec = __tsan_java_mutex_unlock_rec(lockaddr);
  12   if (rec != 2) {
  13     fprintf(stderr, "FAILED 0 rec=%d\n", rec);
  14     exit(1);
  15   }
  16   barrier_wait(&barrier);
  17   barrier_wait(&barrier);
  18   __tsan_java_mutex_lock_rec(lockaddr, rec);
  19   if (*(int*)varaddr != 43) {
  20     fprintf(stderr, "FAILED 3 var=%d\n", *(int*)varaddr);
  21     exit(1);
  22   }
  23   __tsan_java_mutex_unlock(lockaddr);
  24   __tsan_java_mutex_unlock(lockaddr);
  25   return 0;
  26 }
  27
  28 int main() {
  29   barrier_init(&barrier, 2);
  30   int const kHeapSize = 1024 * 1024;
  31   jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
  32   __tsan_java_init(jheap, kHeapSize);
  33   const int kBlockSize = 16;
  34   __tsan_java_alloc(jheap, kBlockSize);
  35   varaddr = jheap;
  36   *(int*)varaddr = 0;
  37   lockaddr = jheap + 8;
  38   pthread_t th;
  39   pthread_create(&th, 0, Thread, 0);
  40   barrier_wait(&barrier);
  41   __tsan_java_mutex_lock(lockaddr);
  42   if (*(int*)varaddr != 42) {
  43     fprintf(stderr, "FAILED 1 var=%d\n", *(int*)varaddr);
  44     exit(1);
  45   }
  46   *(int*)varaddr = 43;
  47   __tsan_java_mutex_unlock(lockaddr);
  48   barrier_wait(&barrier);
  49   pthread_join(th, 0);
  50   __tsan_java_free(jheap, kBlockSize);
  51   fprintf(stderr, "DONE\n");
  52   return __tsan_java_fini();
  53 }
  54
  55 // CHECK-NOT: WARNING: ThreadSanitizer: data race
  56 // CHECK-NOT: FAILED
  57 // CHECK: DONE