compiler-rt/test/tsan/java_move_overlap.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t
   2 // RUN: %run %t 2>&1 | FileCheck %s
   3 // RUN: %run %t arg 2>&1 | FileCheck %s
   4 #include "java.h"
   5
   6 jptr varaddr1_old;
   7 jptr varaddr2_old;
   8 jptr lockaddr1_old;
   9 jptr lockaddr2_old;
  10 jptr varaddr1_new;
  11 jptr varaddr2_new;
  12 jptr lockaddr1_new;
  13 jptr lockaddr2_new;
  14
  15 void *Thread(void *p) {
  16   barrier_wait(&barrier);
  17   __tsan_java_mutex_lock(lockaddr1_new);
  18   *(char*)varaddr1_new = 43;
  19   __tsan_java_mutex_unlock(lockaddr1_new);
  20   __tsan_java_mutex_lock(lockaddr2_new);
  21   *(char*)varaddr2_new = 43;
  22   __tsan_java_mutex_unlock(lockaddr2_new);
  23   return 0;
  24 }
  25
  26 int main(int argc, char **argv) {
  27   barrier_init(&barrier, 2);
  28   int const kHeapSize = 1024 * 1024;
  29   void *jheap = malloc(kHeapSize);
  30   jheap = (char*)jheap + 8;
  31   __tsan_java_init((jptr)jheap, kHeapSize);
  32   const int kBlockSize = 64;
  33   int const kMove = 32;
  34   varaddr1_old = (jptr)jheap;
  35   lockaddr1_old = (jptr)jheap + 1;
  36   varaddr2_old = (jptr)jheap + kBlockSize - 1;
  37   lockaddr2_old = (jptr)jheap + kBlockSize - 16;
  38   varaddr1_new = varaddr1_old + kMove;
  39   lockaddr1_new = lockaddr1_old + kMove;
  40   varaddr2_new = varaddr2_old + kMove;
  41   lockaddr2_new = lockaddr2_old + kMove;
  42   if (argc > 1) {
  43     // Move memory backwards.
  44     varaddr1_old += kMove;
  45     lockaddr1_old += kMove;
  46     varaddr2_old += kMove;
  47     lockaddr2_old += kMove;
  48     varaddr1_new -= kMove;
  49     lockaddr1_new -= kMove;
  50     varaddr2_new -= kMove;
  51     lockaddr2_new -= kMove;
  52   }
  53   __tsan_java_alloc(varaddr1_old, kBlockSize);
  54
  55   pthread_t th;
  56   pthread_create(&th, 0, Thread, 0);
  57
  58   __tsan_java_mutex_lock(lockaddr1_old);
  59   *(char*)varaddr1_old = 43;
  60   __tsan_java_mutex_unlock(lockaddr1_old);
  61   __tsan_java_mutex_lock(lockaddr2_old);
  62   *(char*)varaddr2_old = 43;
  63   __tsan_java_mutex_unlock(lockaddr2_old);
  64
  65   __tsan_java_move(varaddr1_old, varaddr1_new, kBlockSize);
  66   barrier_wait(&barrier);
  67   pthread_join(th, 0);
  68   __tsan_java_free(varaddr1_new, kBlockSize);
  69   fprintf(stderr, "DONE\n");
  70   return __tsan_java_fini();
  71 }
  72
  73 // CHECK-NOT: WARNING: ThreadSanitizer: data race
  74 // CHECK: DONE