src/compiler-rt/test/tsan/restore_stack.cc

   1 // RUN: %clangxx_tsan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
   2 #include "test.h"
   3
   4 int Global;
   5 volatile int x;
   6 const int kSize = 64 << 10;
   7 volatile long data[kSize];
   8
   9 void __attribute__((noinline)) foo() {
  10   for (int i = 0; i < kSize; i++)
  11     data[i]++;
  12 }
  13
  14 void *Thread(void *a) {
  15   __atomic_store_n(&x, 1, __ATOMIC_RELEASE);
  16   foo();
  17   data[0]++;
  18   if (a != 0)
  19     barrier_wait(&barrier);
  20   return 0;
  21 }
  22
  23 int main() {
  24   barrier_init(&barrier, 2);
  25   for (int i = 0; i < 50; i++) {
  26     pthread_t t;
  27     pthread_create(&t, 0, Thread, 0);
  28     pthread_join(t, 0);
  29   }
  30   pthread_t t;
  31   pthread_create(&t, 0, Thread, (void*)1);
  32   barrier_wait(&barrier);
  33   for (int i = 0; i < kSize; i++)
  34     data[i]++;
  35   pthread_join(t, 0);
  36   fprintf(stderr, "DONE\n");
  37   return 0;
  38 }
  39
  40 // Previously this test produced bogus stack traces like:
  41 //   Previous write of size 8 at 0x0000006a8ff8 by thread T17:
  42 //     #0 foo() restore_stack.cc:13:5 (restore_stack.cc.exe+0x00000040622c)
  43 //     #1 Thread(void*) restore_stack.cc:18:3 (restore_stack.cc.exe+0x000000406283)
  44 //     #2 __tsan_thread_start_func rtl/tsan_interceptors.cc:886 (restore_stack.cc.exe+0x00000040a749)
  45 //     #3 Thread(void*) restore_stack.cc:18:3 (restore_stack.cc.exe+0x000000406283)
  46
  47 // CHECK: WARNING: ThreadSanitizer: data race
  48 // CHECK-NOT: __tsan_thread_start_func
  49 // CHECK-NOT: #3 Thread
  50 // CHECK: DONE