3ab6b2347e
Even sleep(1) lead to episodical flakes on some machines. Use an invisible by tsan barrier to enforce required execution order instead. This makes the tests deterministic and faster. llvm-svn: 226659
51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
// RUN: %clangxx_tsan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
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#include "test.h"
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int Global;
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volatile int x;
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const int kSize = 64 << 10;
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volatile long data[kSize];
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void __attribute__((noinline)) foo() {
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for (int i = 0; i < kSize; i++)
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data[i]++;
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}
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void *Thread(void *a) {
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__atomic_store_n(&x, 1, __ATOMIC_RELEASE);
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foo();
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data[0]++;
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if (a != 0)
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barrier_wait(&barrier);
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return 0;
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}
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int main() {
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barrier_init(&barrier, 2);
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for (int i = 0; i < 50; i++) {
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pthread_t t;
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pthread_create(&t, 0, Thread, 0);
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pthread_join(t, 0);
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}
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pthread_t t;
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pthread_create(&t, 0, Thread, (void*)1);
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barrier_wait(&barrier);
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for (int i = 0; i < kSize; i++)
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data[i]++;
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pthread_join(t, 0);
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fprintf(stderr, "DONE\n");
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return 0;
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}
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// Previously this test produced bogus stack traces like:
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// Previous write of size 8 at 0x0000006a8ff8 by thread T17:
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// #0 foo() restore_stack.cc:13:5 (restore_stack.cc.exe+0x00000040622c)
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// #1 Thread(void*) restore_stack.cc:18:3 (restore_stack.cc.exe+0x000000406283)
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// #2 __tsan_thread_start_func rtl/tsan_interceptors.cc:886 (restore_stack.cc.exe+0x00000040a749)
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// #3 Thread(void*) restore_stack.cc:18:3 (restore_stack.cc.exe+0x000000406283)
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK-NOT: __tsan_thread_start_func
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// CHECK-NOT: #3 Thread
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// CHECK: DONE
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