forked from OSchip/llvm-project
39 lines
882 B
C++
39 lines
882 B
C++
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// RUN: %clang_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
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#include <pthread.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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extern "C" {
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void AnnotateIgnoreReadsBegin(const char *f, int l);
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void AnnotateIgnoreReadsEnd(const char *f, int l);
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void AnnotateIgnoreWritesBegin(const char *f, int l);
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void AnnotateIgnoreWritesEnd(const char *f, int l);
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}
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int *g;
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void *Thread(void *a) {
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int *p = 0;
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while ((p = __atomic_load_n(&g, __ATOMIC_RELAXED)) == 0)
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usleep(100);
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*p = 42;
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return 0;
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}
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int main() {
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pthread_t t;
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pthread_create(&t, 0, Thread, 0);
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AnnotateIgnoreWritesBegin(__FILE__, __LINE__);
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int *p = new int(0);
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AnnotateIgnoreWritesEnd(__FILE__, __LINE__);
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__atomic_store_n(&g, p, __ATOMIC_RELAXED);
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pthread_join(t, 0);
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delete p;
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fprintf(stderr, "OK\n");
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return 0;
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}
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// CHECK-NOT: WARNING: ThreadSanitizer: data race
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// CHECK: OK
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