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41 lines
781 B
41 lines
781 B
4 months ago
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// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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static void *racer(void *p) {
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*(int*)p = 42;
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return 0;
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}
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int main() {
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switch (fork()) {
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default: // parent
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while (wait(0) < 0) {}
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break;
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case 0: // child
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{
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int x = 0;
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pthread_t th1, th2;
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pthread_create(&th1, 0, racer, &x);
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pthread_create(&th2, 0, racer, &x);
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pthread_join(th1, 0);
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pthread_join(th2, 0);
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exit(0);
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break;
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}
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case -1: // error
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fprintf(stderr, "failed to fork (%d)\n", errno);
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exit(1);
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}
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fprintf(stderr, "OK\n");
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}
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// CHECK: ThreadSanitizer: data race
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// CHECK: OK
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