forked from OSchip/llvm-project
31 lines
618 B
C
31 lines
618 B
C
// RUN: %clang_tsan %s -o %t
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// RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer'
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#include <dispatch/dispatch.h>
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#include <stdio.h>
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long global;
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int main() {
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fprintf(stderr, "Hello world.");
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global = 42;
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dispatch_semaphore_t sem = dispatch_semaphore_create(0);
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dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
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global = 43;
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dispatch_semaphore_signal(sem);
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});
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dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);
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global = 44;
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fprintf(stderr, "Done.");
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return 0;
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}
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// CHECK: Hello world.
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// CHECK: Done.
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