forked from OSchip/llvm-project
46 lines
932 B
C++
46 lines
932 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | 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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#include <errno.h>
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int fd;
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char buf;
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void *Thread1(void *x) {
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barrier_wait(&barrier);
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read(fd, &buf, 1);
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return NULL;
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}
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void *Thread2(void *x) {
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read(fd, &buf, 1);
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barrier_wait(&barrier);
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return NULL;
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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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if (fd < 0) {
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fprintf(stderr, "failed to open /dev/random (%d)\n", errno);
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return 1;
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}
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pthread_t t[2];
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pthread_create(&t[0], NULL, Thread1, NULL);
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pthread_create(&t[1], NULL, Thread2, NULL);
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pthread_join(t[0], NULL);
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pthread_join(t[1], NULL);
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close(fd);
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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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// CHECK: Write of size 1
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// CHECK: #0 read
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// CHECK: Previous write of size 1
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// CHECK: #0 read
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// CHECK: DONE
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