e4c1dd2c08
TSan recently got the "ignore_noninstrumented_modules" flag, which disables tracking of read and writes that come from noninstrumented modules (via interceptors). This is a way of suppressing false positives coming from system libraries and other noninstrumented code. This patch turns this on by default on Darwin, where it's supposed to replace the previous solution, "ignore_interceptors_accesses", which disables tracking in *all* interceptors. The new approach should re-enable TSan's ability to find races via interceptors on Darwin. Differential Revision: https://reviews.llvm.org/D29041 llvm-svn: 292981
38 lines
815 B
Plaintext
38 lines
815 B
Plaintext
// RUN: %clang_tsan %s -o %t -framework Foundation
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// RUN: %run %t 2>&1 | FileCheck %s
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#import <Foundation/Foundation.h>
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long global;
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void handler(void *arg) {
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fprintf(stderr, "global = %ld\n", global);
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dispatch_sync(dispatch_get_main_queue(), ^{
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CFRunLoopStop(CFRunLoopGetCurrent());
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});
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}
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int main(int argc, const char *argv[]) {
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dispatch_queue_t queue =
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dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);
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dispatch_source_t source =
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dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue);
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dispatch_source_set_timer(source, dispatch_walltime(NULL, 0), 1e9, 5);
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global = 42;
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dispatch_source_set_event_handler_f(source, &handler);
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dispatch_resume(source);
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CFRunLoopRun();
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return 0;
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}
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// CHECK: global = 42
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// CHECK-NOT: WARNING: ThreadSanitizer
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