233f401c2b
Add a script that is used to deflake inherently flaky tsan tests. It is invoked from lit tests as: %deflake %run %t The script runs the target program up to 10 times, until it produces a tsan warning. llvm-svn: 209898
30 lines
618 B
C++
30 lines
618 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
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#include <pthread.h>
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#include <unistd.h>
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int Global;
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void *Thread1(void *x) {
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sleep(1);
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__atomic_fetch_add(&Global, 1, __ATOMIC_RELAXED);
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return NULL;
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}
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void *Thread2(void *x) {
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Global++;
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return NULL;
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}
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int main() {
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pthread_t t[2];
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pthread_create(&t[0], NULL, Thread1, NULL);
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pthread_create(&t[1], NULL, Thread2, NULL);
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pthread_join(t[0], NULL);
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pthread_join(t[1], NULL);
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}
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK: Atomic write of size 4
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// CHECK: #0 __tsan_atomic32_fetch_add
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// CHECK: #1 Thread1
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