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e1b82d852d
* Move TSan function lookup out of the common path Move TSan function lookup via `dlsym()` out of the common path. The TSan runtime will now call `__tsan_on_initialize()` which we can use to initialize the TSan functions in the Swift runtime. This avoids paying the cost of `dlsym()` in the common, non-TSan case. Depends on: https://reviews.llvm.org/D98810 rdar://75493372 * Remove Windows code Thread Sanitizer is not supported on Windows. Co-authored-by: Julian Lettner <julian.lettner@apple.com>
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
//===--- ThreadSanitizer.cpp - Thread Sanitizer support -------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2021 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Thread Sanitizer support for the Swift Task runtime.
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//
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//===----------------------------------------------------------------------===//
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#include "TaskPrivate.h"
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// Thread Sanitizer is not supported on Windows.
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#if defined(_WIN32)
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void swift::_swift_tsan_acquire(void *addr) {}
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void swift::_swift_tsan_release(void *addr) {}
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#else
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#include <dlfcn.h>
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namespace {
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using TSanFunc = void(void *);
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TSanFunc *tsan_acquire, *tsan_release;
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} // anonymous namespace
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void swift::_swift_tsan_acquire(void *addr) {
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if (tsan_acquire) {
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tsan_acquire(addr);
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}
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}
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void swift::_swift_tsan_release(void *addr) {
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if (tsan_release) {
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tsan_release(addr);
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}
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}
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SWIFT_EXPORT_FROM(swift_Concurrency) SWIFT_CC(c)
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void __tsan_on_initialize() {
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tsan_acquire = (TSanFunc *)dlsym(RTLD_DEFAULT, "__tsan_acquire");
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tsan_release = (TSanFunc *)dlsym(RTLD_DEFAULT, "__tsan_release");
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}
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#endif
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