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| // Check that ignore_noninstrumented_modules=1 suppresses reporting races from
// system libraries on OS X. There are currently false positives coming from
// libxpc, libdispatch, CoreFoundation and others, because these libraries use
// TSan-invisible atomics as synchronization.
// RUN: %clang_tsan %s -o %t -framework Foundation
// Check that without the flag, there are false positives.
// RUN: %env_tsan_opts=ignore_noninstrumented_modules=0 %deflake %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-RACE
// With ignore_noninstrumented_modules=1, no races are reported.
// RUN: %env_tsan_opts=ignore_noninstrumented_modules=1 %run %t 2>&1 | FileCheck %s
// With ignore_noninstrumented_modules=1, races in user's code are still reported.
// RUN: %env_tsan_opts=ignore_noninstrumented_modules=1 %deflake %run %t race 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-RACE
#import <Foundation/Foundation.h>
#import "../test.h"
char global_buf[64];
void *Thread1(void *x) {
barrier_wait(&barrier);
strcpy(global_buf, "hello world");
return NULL;
}
void *Thread2(void *x) {
strcpy(global_buf, "world hello");
barrier_wait(&barrier);
return NULL;
}
int main(int argc, char *argv[]) {
fprintf(stderr, "Hello world.\n");
// NSUserDefaults uses XPC which triggers the false positive.
NSDictionary *d = [[NSUserDefaults standardUserDefaults] dictionaryRepresentation];
fprintf(stderr, "d = %p\n", d);
if (argc > 1 && strcmp(argv[1], "race") == 0) {
barrier_init(&barrier, 2);
pthread_t t[2];
pthread_create(&t[0], NULL, Thread1, NULL);
pthread_create(&t[1], NULL, Thread2, NULL);
pthread_join(t[0], NULL);
pthread_join(t[1], NULL);
}
fprintf(stderr, "Done.\n");
}
// CHECK: Hello world.
// CHECK-RACE: SUMMARY: ThreadSanitizer: data race
// CHECK: Done.
|