forked from OSchip/llvm-project
37 lines
828 B
C++
37 lines
828 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
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#include "test.h"
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#include <string.h>
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int x[4], z[4];
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void *MemCpyThread(void *a) {
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memcpy((int*)a, z, 16);
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barrier_wait(&barrier);
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return NULL;
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}
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void *MemSetThread(void *a) {
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barrier_wait(&barrier);
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memset((int*)a, 0, 16);
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return NULL;
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}
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int main() {
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barrier_init(&barrier, 2);
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pthread_t t[2];
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// Race on x between memcpy and memset
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pthread_create(&t[0], NULL, MemCpyThread, x);
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pthread_create(&t[1], NULL, MemSetThread, x);
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pthread_join(t[0], NULL);
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pthread_join(t[1], NULL);
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fprintf(stderr, "PASS\n");
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return 0;
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}
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK: #0 memset
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// CHECK: #{{[12]}} MemSetThread
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// CHECK: Previous write
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// CHECK: #0 {{(memcpy|memmove)}}
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// CHECK: #{{[12]}} MemCpyThread
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