| 1 | // RUN: %clang_tsan -O1 %s -lpthread -o %t && %deflake %run %t | FileCheck %s |
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| 2 | // Regression test for |
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| 3 | // https://github.com/google/sanitizers/issues/468 |
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| 4 | // When the data race was reported, pthread_atfork() handler used to be |
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| 5 | // executed which caused another race report in the same thread, which resulted |
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| 6 | // in a deadlock. |
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| 7 | #include "test.h" |
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| 8 | |
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| 9 | int glob = 0; |
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| 10 | |
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| 11 | void *worker(void *unused) { |
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| 12 | barrier_wait(barrier: &barrier); |
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| 13 | glob++; |
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| 14 | return NULL; |
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| 15 | } |
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| 16 | |
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| 17 | void atfork() { |
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| 18 | fprintf(stderr, format: "ATFORK\n" ); |
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| 19 | glob++; |
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| 20 | } |
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| 21 | |
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| 22 | int main() { |
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| 23 | barrier_init(barrier: &barrier, count: 2); |
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| 24 | pthread_atfork(prepare: atfork, parent: atfork, child: atfork); |
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| 25 | pthread_t t; |
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| 26 | pthread_create(newthread: &t, NULL, start_routine: worker, NULL); |
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| 27 | glob++; |
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| 28 | barrier_wait(barrier: &barrier); |
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| 29 | pthread_join(th: t, NULL); |
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| 30 | // CHECK: ThreadSanitizer: data race |
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| 31 | // CHECK-NOT: ATFORK |
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| 32 | return 0; |
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| 33 | } |
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| 34 | |
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