3ab6b2347e
Even sleep(1) lead to episodical flakes on some machines. Use an invisible by tsan barrier to enforce required execution order instead. This makes the tests deterministic and faster. llvm-svn: 226659
47 lines
985 B
C++
47 lines
985 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && TSAN_OPTIONS="atexit_sleep_ms=50" %run %t 2>&1 | FileCheck %s
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#include "test.h"
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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int counter;
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static void *incrementer(void *p) {
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for (;;)
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__sync_fetch_and_add(&counter, 1);
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return 0;
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}
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static void *watchdog(void *p) {
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sleep(100); // is not intended to exit
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fprintf(stderr, "timed out after 100 seconds\n");
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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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barrier_init(&barrier, 2);
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pthread_t th1, th2;
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pthread_create(&th1, 0, incrementer, 0);
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pthread_create(&th2, 0, watchdog, 0);
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for (int i = 0; i < 10; i++) {
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switch (fork()) {
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default: // parent
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while (wait(0) < 0) {}
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fprintf(stderr, ".");
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break;
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case 0: // child
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__sync_fetch_and_add(&counter, 1);
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exit(0);
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break;
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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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}
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fprintf(stderr, "OK\n");
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}
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// CHECK: OK
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