forked from OSchip/llvm-project
34 lines
768 B
C++
34 lines
768 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
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#include "test.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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// dup2(oldfd, newfd) races with close(newfd).
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int fd;
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void *Thread(void *x) {
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barrier_wait(&barrier);
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if (close(fd) == -1)
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exit(printf("close failed\n"));
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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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fd = open("/dev/random", O_RDONLY);
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int fd2 = open("/dev/random", O_RDONLY);
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if (fd == -1 || fd2 == -1)
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exit(printf("open failed\n"));
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pthread_t th;
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pthread_create(&th, 0, Thread, 0);
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if (dup2(fd2, fd) == -1)
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exit(printf("dup2 failed\n"));
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barrier_wait(&barrier);
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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: WARNING: ThreadSanitizer: data race
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