forked from OSchip/llvm-project
56 lines
1.8 KiB
Plaintext
56 lines
1.8 KiB
Plaintext
// Check that ignore_interceptors_accesses=1 supresses reporting races from
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// system libraries on OS X. There are currently false positives coming from
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// libxpc, libdispatch, CoreFoundation and others, because these libraries use
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// TSan-invisible atomics as synchronization.
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// RUN: %clang_tsan %s -o %t -framework Foundation
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// Check that without the flag, there are false positives.
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// RUN: %env_tsan_opts=ignore_noninstrumented_modules=0 %deflake %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-RACE
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// With ignore_interceptors_accesses=1, no races are reported.
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// RUN: %env_tsan_opts=ignore_noninstrumented_modules=0:ignore_interceptors_accesses=1 %run %t 2>&1 | FileCheck %s
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// With ignore_interceptors_accesses=1, races in user's code are still reported.
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// RUN: %env_tsan_opts=ignore_noninstrumented_modules=0:ignore_interceptors_accesses=1 %deflake %run %t race 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-RACE
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#import <Foundation/Foundation.h>
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#import "../test.h"
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long global;
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void *Thread1(void *x) {
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barrier_wait(&barrier);
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global = 42;
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return NULL;
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}
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void *Thread2(void *x) {
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global = 43;
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barrier_wait(&barrier);
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return NULL;
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}
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int main(int argc, char *argv[]) {
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fprintf(stderr, "Hello world.\n");
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// NSUserDefaults uses XPC which triggers the false positive.
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NSDictionary *d = [[NSUserDefaults standardUserDefaults] dictionaryRepresentation];
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if (argc > 1 && strcmp(argv[1], "race") == 0) {
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barrier_init(&barrier, 2);
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pthread_t t[2];
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pthread_create(&t[0], NULL, Thread1, NULL);
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pthread_create(&t[1], NULL, Thread2, NULL);
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pthread_join(t[0], NULL);
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pthread_join(t[1], NULL);
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}
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fprintf(stderr, "Done.\n");
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}
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// CHECK: Hello world.
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// CHECK-RACE: SUMMARY: ThreadSanitizer: data race
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// CHECK: Done.
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