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48 lines
1.1 KiB
48 lines
1.1 KiB
// RUN: %clang_tsan %s -o %t
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// RUN: %deflake %run %t 2>&1 | FileCheck %s
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#include "dispatch/dispatch.h"
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#include "../test.h"
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long global;
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int main() {
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fprintf(stderr, "Hello world.\n");
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print_address("addr=", 1, &global);
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dispatch_semaphore_t done = dispatch_semaphore_create(0);
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barrier_init(&barrier, 2);
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dispatch_queue_t q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);
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dispatch_queue_t bgq = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
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dispatch_barrier_sync(q, ^{
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global = 42;
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});
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dispatch_async(bgq, ^{
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dispatch_sync(q, ^{
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global = 43;
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barrier_wait(&barrier);
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});
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});
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dispatch_async(bgq, ^{
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dispatch_sync(q, ^{
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barrier_wait(&barrier);
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global = 44;
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dispatch_semaphore_signal(done);
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});
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});
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dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);
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fprintf(stderr, "Done.\n");
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}
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// CHECK: Hello world.
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// CHECK: addr=[[ADDR:0x[0-9,a-f]+]]
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK: Location is global 'global' {{(of size 8 )?}}at [[ADDR]] (barrier-race.c.tmp+0x{{[0-9,a-f]+}})
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// CHECK: Done.
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