48 lines
797 B
C++
48 lines
797 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 <stdlib.h>
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#include <stdio.h>
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#include <sched.h>
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struct Cache {
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int x;
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};
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Cache g_cache;
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Cache *CreateCache() {
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g_cache.x = rand();
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return &g_cache;
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}
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_Atomic(Cache*) queue;
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void *Thread1(void *x) {
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static Cache *c = CreateCache();
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__c11_atomic_store(&queue, c, 0);
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return 0;
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}
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void *Thread2(void *x) {
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Cache *c = 0;
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for (;;) {
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c = __c11_atomic_load(&queue, 0);
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if (c)
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break;
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sched_yield();
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}
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if (c->x >= RAND_MAX)
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exit(1);
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return 0;
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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], 0, Thread1, 0);
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pthread_create(&t[1], 0, Thread2, 0);
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pthread_join(t[0], 0);
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pthread_join(t[1], 0);
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}
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// CHECK: WARNING: ThreadSanitizer: data race
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