| 1 | // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s |
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| 2 | #include <pthread.h> |
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| 3 | #include <stdio.h> |
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| 4 | #include <unistd.h> |
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| 5 | |
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| 6 | int fds[2]; |
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| 7 | int X; |
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| 8 | |
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| 9 | void *Thread1(void *x) { |
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| 10 | X = 42; |
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| 11 | write(fd: fds[1], buf: "a" , n: 1); |
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| 12 | return NULL; |
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| 13 | } |
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| 14 | |
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| 15 | void *Thread2(void *x) { |
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| 16 | char buf; |
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| 17 | while (read(fd: fds[0], buf: &buf, nbytes: 1) != 1) { |
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| 18 | } |
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| 19 | X = 43; |
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| 20 | return NULL; |
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| 21 | } |
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| 22 | |
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| 23 | int main() { |
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| 24 | pipe(pipedes: fds); |
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| 25 | pthread_t t[2]; |
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| 26 | pthread_create(newthread: &t[0], NULL, start_routine: Thread1, NULL); |
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| 27 | pthread_create(newthread: &t[1], NULL, start_routine: Thread2, NULL); |
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| 28 | pthread_join(th: t[0], NULL); |
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| 29 | pthread_join(th: t[1], NULL); |
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| 30 | fprintf(stderr, format: "OK\n" ); |
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| 31 | } |
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| 32 | |
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| 33 | // CHECK-NOT: WARNING: ThreadSanitizer: data race |
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| 34 | |
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