mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
ee5efff5b1
* Use the longer name ThreadSanitizer rather than TSan for the new files. * Don't implement `tsan::consume` at all for now. * Do the `tsan::release` for `ulock_unlock()` at the head of the function, not at the tail. * Add a comment to test/Sanitizers/tsan/once.swift to explain the test a little more clearly. rdar://110665213
50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
//===--- ThreadSanitizer.cpp - Thread Sanitizer support -------------------===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2023 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Helper functions for code that needs to integrate with the thread
|
|
// sanitizer. In particular, TSan can't see inside the runtime libraries,
|
|
// so we occasionally need to give it a hint that we're doing synchronization
|
|
// in order to avoid false positives.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "swift/Threading/ThreadSanitizer.h"
|
|
#include "swift/shims/Visibility.h"
|
|
|
|
namespace swift {
|
|
namespace threading_impl {
|
|
|
|
bool tsan_enabled = false;
|
|
void (*tsan_acquire)(const void *) = nullptr;
|
|
void (*tsan_release)(const void *) = nullptr;
|
|
|
|
#if __has_include(<dlfcn.h>)
|
|
#include <dlfcn.h>
|
|
|
|
// The TSan library code will call this function when it starts up
|
|
extern "C" SWIFT_ATTRIBUTE_FOR_EXPORTS
|
|
void __tsan_on_initialize() {
|
|
tsan_enabled = true;
|
|
tsan_acquire = (void (*)(const void *))dlsym(RTLD_DEFAULT, "__tsan_acquire");
|
|
tsan_release = (void (*)(const void *))dlsym(RTLD_DEFAULT, "__tsan_release");
|
|
|
|
// Always call through to the next image
|
|
void (*next_init)(void);
|
|
next_init = (void (*)(void))dlsym(RTLD_NEXT, "__tsan_on_initialize");
|
|
if (next_init)
|
|
next_init();
|
|
}
|
|
#endif
|
|
|
|
} // namespace threading_impl
|
|
} // namespace swift
|