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//===--- rtsan_context.cpp - Realtime Sanitizer -----------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
//===----------------------------------------------------------------------===//
#include "rtsan/rtsan_context.h"
#include "rtsan/rtsan.h"
#include "sanitizer_common/sanitizer_allocator_internal.h"
#include <new>
#include <pthread.h>
using namespace __sanitizer;
using namespace __rtsan;
static pthread_key_t context_key;
static pthread_once_t key_once = PTHREAD_ONCE_INIT;
// InternalFree cannot be passed directly to pthread_key_create
// because it expects a signature with only one arg
static void InternalFreeWrapper(void *ptr) { __sanitizer::InternalFree(ptr); }
static __rtsan::Context &GetContextForThisThreadImpl() {
auto MakeThreadLocalContextKey = []() {
CHECK_EQ(pthread_key_create(&context_key, InternalFreeWrapper), 0);
};
pthread_once(&key_once, MakeThreadLocalContextKey);
Context *current_thread_context =
static_cast<Context *>(pthread_getspecific(context_key));
if (current_thread_context == nullptr) {
current_thread_context =
static_cast<Context *>(InternalAlloc(sizeof(Context)));
new (current_thread_context) Context();
pthread_setspecific(context_key, current_thread_context);
}
return *current_thread_context;
}
__rtsan::Context::Context() = default;
void __rtsan::Context::RealtimePush() { realtime_depth_++; }
void __rtsan::Context::RealtimePop() { realtime_depth_--; }
void __rtsan::Context::BypassPush() { bypass_depth_++; }
void __rtsan::Context::BypassPop() { bypass_depth_--; }
bool __rtsan::Context::InRealtimeContext() const { return realtime_depth_ > 0; }
bool __rtsan::Context::IsBypassed() const { return bypass_depth_ > 0; }
Context &__rtsan::GetContextForThisThread() {
return GetContextForThisThreadImpl();
}
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