| 1 | // RUN: %clang_tsan %s -o %t |
|---|
| 2 | // RUN: %deflake %run %t 2>&1 | FileCheck %s |
|---|
| 3 | |
|---|
| 4 | #include "dispatch/dispatch.h" |
|---|
| 5 | |
|---|
| 6 | #include "../test.h" |
|---|
| 7 | |
|---|
| 8 | long global; |
|---|
| 9 | |
|---|
| 10 | int main() { |
|---|
| 11 | fprintf(stderr, format: "Hello world.\n" ); |
|---|
| 12 | print_address("addr=" , 1, &global); |
|---|
| 13 | dispatch_semaphore_t done = dispatch_semaphore_create(0); |
|---|
| 14 | barrier_init(barrier: &barrier, count: 2); |
|---|
| 15 | |
|---|
| 16 | dispatch_queue_t q = dispatch_queue_create("my.queue" , DISPATCH_QUEUE_CONCURRENT); |
|---|
| 17 | dispatch_queue_t bgq = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); |
|---|
| 18 | |
|---|
| 19 | dispatch_barrier_sync(q, ^{ |
|---|
| 20 | global = 42; |
|---|
| 21 | }); |
|---|
| 22 | |
|---|
| 23 | dispatch_async(bgq, ^{ |
|---|
| 24 | dispatch_sync(q, ^{ |
|---|
| 25 | global = 43; |
|---|
| 26 | barrier_wait(barrier: &barrier); |
|---|
| 27 | }); |
|---|
| 28 | }); |
|---|
| 29 | |
|---|
| 30 | dispatch_async(bgq, ^{ |
|---|
| 31 | dispatch_sync(q, ^{ |
|---|
| 32 | barrier_wait(barrier: &barrier); |
|---|
| 33 | global = 44; |
|---|
| 34 | |
|---|
| 35 | dispatch_semaphore_signal(done); |
|---|
| 36 | }); |
|---|
| 37 | }); |
|---|
| 38 | |
|---|
| 39 | dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER); |
|---|
| 40 | fprintf(stderr, format: "Done.\n" ); |
|---|
| 41 | } |
|---|
| 42 | |
|---|
| 43 | // CHECK: Hello world. |
|---|
| 44 | // CHECK: addr=[[ADDR:0x[0-9,a-f]+]] |
|---|
| 45 | // CHECK: WARNING: ThreadSanitizer: data race |
|---|
| 46 | // CHECK: Location is global 'global' {{(of size 8 )?}}at [[ADDR]] (barrier-race.c.tmp+0x{{[0-9,a-f]+}}) |
|---|
| 47 | // CHECK: Done. |
|---|
| 48 | |
|---|
