forked from OSchip/llvm-project
43 lines
1006 B
C++
43 lines
1006 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %run %t
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// Data race randomly triggered.
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// UNSUPPORTED: netbsd
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// Make sure TSan doesn't deadlock on a file stream lock at program shutdown.
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// See https://github.com/google/sanitizers/issues/454
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#ifdef __FreeBSD__
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#define _WITH_GETLINE // to declare getline()
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#endif
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#include <pthread.h>
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#include <stdio.h>
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#include <unistd.h>
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void *thread(void *unused) {
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char *line = NULL;
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size_t size;
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int fd[2];
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pipe(fd);
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// Forge a non-standard stream to make sure it's not closed.
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FILE *stream = fdopen(fd[0], "r");
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while (1) {
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volatile int res = getline(&line, &size, stream);
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(void)res;
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}
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return NULL;
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}
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int main() {
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pthread_t t;
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pthread_attr_t a;
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pthread_attr_init(&a);
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pthread_attr_setdetachstate(&a, PTHREAD_CREATE_DETACHED);
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pthread_create(&t, &a, thread, NULL);
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pthread_attr_destroy(&a);
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fprintf(stderr, "DONE\n");
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return 0;
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// ThreadSanitizer used to hang here because of a deadlock on a file stream.
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}
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// CHECK: DONE
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