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Commit | Line | Data |
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5bcae85e | 1 | // RUN: %clang_tsan %s -o %t -framework Foundation |
2c00a5a8 | 2 | // RUN: %deflake %run %t 2>&1 | FileCheck %s |
5bcae85e SL |
3 | |
4 | #import <Foundation/Foundation.h> | |
5 | ||
6 | #import "../test.h" | |
7 | ||
8 | dispatch_queue_t queue; | |
9 | dispatch_data_t data; | |
10 | dispatch_semaphore_t sem; | |
11 | const char *path; | |
12 | ||
13 | long my_global = 0; | |
14 | ||
15 | int main(int argc, const char *argv[]) { | |
16 | fprintf(stderr, "Hello world.\n"); | |
17 | print_address("addr=", 1, &my_global); | |
18 | barrier_init(&barrier, 2); | |
19 | ||
20 | queue = dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT); | |
21 | sem = dispatch_semaphore_create(0); | |
22 | NSString *ns_path = [NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"temp-gcd-io.%d", getpid()]]; | |
23 | path = ns_path.fileSystemRepresentation; | |
24 | NSData *ns_data = [NSMutableData dataWithLength:1000]; | |
25 | data = dispatch_data_create(ns_data.bytes, ns_data.length, NULL, DISPATCH_DATA_DESTRUCTOR_DEFAULT); | |
26 | ||
27 | dispatch_io_t channel = dispatch_io_create_with_path(DISPATCH_IO_STREAM, path, O_CREAT | O_WRONLY, 0666, queue, ^(int error) { }); | |
28 | if (! channel) abort(); | |
29 | dispatch_io_set_high_water(channel, 1); | |
30 | ||
31 | dispatch_io_write(channel, 0, data, queue, ^(bool done, dispatch_data_t remainingData, int error) { | |
32 | if (error) abort(); | |
33 | my_global = 42; | |
34 | barrier_wait(&barrier); | |
35 | }); | |
36 | ||
37 | dispatch_io_barrier(channel, ^{ | |
38 | barrier_wait(&barrier); | |
39 | my_global = 43; | |
40 | ||
41 | dispatch_semaphore_signal(sem); | |
42 | }); | |
43 | ||
44 | dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER); | |
45 | dispatch_io_close(channel, 0); | |
46 | ||
47 | fprintf(stderr, "Done.\n"); | |
48 | return 0; | |
49 | } | |
50 | ||
51 | // CHECK: Hello world. | |
52 | // CHECK: addr=[[ADDR:0x[0-9,a-f]+]] | |
53 | // CHECK: WARNING: ThreadSanitizer: data race | |
54 | // CHECK: Location is global 'my_global' {{(of size 8 )?}}at [[ADDR]] (gcd-io-barrier-race.mm.tmp+0x{{[0-9,a-f]+}}) | |
55 | // CHECK: Done. |