forked from OSchip/llvm-project
54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
// RUN: %clangxx_tsan -O1 %s -o %t
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// RUN: %run %t 2>&1 | FileCheck %s
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// RUN: %run %t arg 2>&1 | FileCheck %s
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// RUN: %run %t arg arg 2>&1 | FileCheck %s
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#include "test.h"
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// Test for destruction of pthread_cond_t.
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// POSIX states that it is safe to destroy a condition variable upon which no
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// threads are currently blocked. That is, it is not necessary to wait untill
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// other threads return from pthread_cond_wait, they just need to be unblocked.
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pthread_mutex_t m;
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pthread_cond_t c;
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bool done1, done2;
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void *thr(void *p) {
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pthread_mutex_lock(&m);
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done1 = true;
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pthread_cond_signal(&c);
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while (!done2)
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pthread_cond_wait(&c, &m);
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pthread_mutex_unlock(&m);
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return 0;
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}
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int main(int argc, char **argv) {
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pthread_t th;
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pthread_mutex_init(&m, 0);
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pthread_cond_init(&c, 0);
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pthread_create(&th, 0, thr, 0);
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pthread_mutex_lock(&m);
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while (!done1)
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pthread_cond_wait(&c, &m);
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done2 = true;
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// Any of these sequences is legal.
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if (argc == 1) {
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pthread_cond_signal(&c);
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pthread_mutex_unlock(&m);
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pthread_cond_destroy(&c);
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} else if (argc == 2) {
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pthread_mutex_unlock(&m);
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pthread_cond_signal(&c);
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pthread_cond_destroy(&c);
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} else {
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pthread_cond_signal(&c);
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pthread_cond_destroy(&c);
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pthread_mutex_unlock(&m);
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}
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pthread_join(th, 0);
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fprintf(stderr, "DONE\n");
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}
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// CHECK-NOT: ThreadSanitizer: data race
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