61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
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// Check that dispatch_once() is always intercepted.
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// RUN: %clang_tsan %s -o %t
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// RUN: not %env_tsan_opts=ignore_noninstrumented_modules=0 %run %t 2>&1 | FileCheck %s
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#include <dispatch/dispatch.h>
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#include <pthread.h>
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#include <stdio.h>
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#include "../test.h"
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long g = 0;
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long h = 0;
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__attribute__((disable_sanitizer_instrumentation))
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void f() {
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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g++;
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});
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h++;
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}
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// Required for dyld macOS 12.0+
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#if (__APPLE__)
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__attribute__((weak))
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#endif
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__attribute__((disable_sanitizer_instrumentation))
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extern void
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__tsan_on_report() {
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fprintf(stderr, "Report.\n");
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// Without these annotations this test deadlocks for COMPILER_RT_DEBUG=ON
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// builds. Conceptually, the TSan runtime does not support reentrancy from
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// runtime callbacks, but the main goal here is just to check that
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// dispatch_once() is always intercepted.
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AnnotateIgnoreSyncBegin(__FILE__, __LINE__);
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f();
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AnnotateIgnoreSyncEnd(__FILE__, __LINE__);
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}
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int main() {
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fprintf(stderr, "Hello world.\n");
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f();
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pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
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pthread_mutex_unlock(&mutex); // Unlock of an unlocked mutex
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fprintf(stderr, "g = %ld.\n", g);
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fprintf(stderr, "h = %ld.\n", h);
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fprintf(stderr, "Done.\n");
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}
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// CHECK: Hello world.
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// CHECK: Report.
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// CHECK: g = 1
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// CHECK: h = 2
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// CHECK: Done.
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