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/*
* Copyright (C) 2008-2020 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "InitializeThreading.h"
#include "ExecutableAllocator.h"
#include "JITOperationList.h"
#include "JSCConfig.h"
#include "JSCPtrTag.h"
#include "LLIntData.h"
#include "Options.h"
#include "SigillCrashAnalyzer.h"
#include "SuperSampler.h"
#include "VMTraps.h"
#include "WasmCalleeRegistry.h"
#include "WasmCapabilities.h"
#include "WasmFaultSignalHandler.h"
#include "WasmThunks.h"
#include <mutex>
#include <wtf/Threading.h>
#include <wtf/threads/Signals.h>
namespace JSC {
static_assert(sizeof(bool) == 1, "LLInt and JIT assume sizeof(bool) is always 1 when touching it directly from assembly code.");
void initialize()
{
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
WTF::initialize();
Options::initialize();
initializePtrTagLookup();
#if ENABLE(WRITE_BARRIER_PROFILING)
WriteBarrierCounters::initialize();
#endif
{
Options::AllowUnfinalizedAccessScope scope;
JITOperationList::initialize();
ExecutableAllocator::initialize();
VM::computeCanUseJIT();
if (!g_jscConfig.vm.canUseJIT) {
Options::useJIT() = false;
Options::recomputeDependentOptions();
}
}
Options::finalize();
JITOperationList::populatePointersInJavaScriptCore();
if (Options::useSigillCrashAnalyzer())
enableSigillCrashAnalyzer();
LLInt::initialize();
DisallowGC::initialize();
initializeSuperSampler();
Thread& thread = Thread::current();
thread.setSavedLastStackTop(thread.stack().origin());
#if ENABLE(WEBASSEMBLY)
if (Wasm::isSupported()) {
Wasm::Thunks::initialize();
Wasm::CalleeRegistry::initialize();
}
#endif
if (VM::isInMiniMode())
WTF::fastEnableMiniMode();
#if HAVE(MACH_EXCEPTIONS)
// JSLock::lock() can call registerThreadForMachExceptionHandling() which crashes if this has not been called first.
WTF::startMachExceptionHandlerThread();
#endif
VMTraps::initializeSignals();
#if ENABLE(WEBASSEMBLY)
Wasm::prepareFastMemory();
#endif
WTF::compilerFence();
RELEASE_ASSERT(!g_jscConfig.initializeHasBeenCalled);
g_jscConfig.initializeHasBeenCalled = true;
});
}
} // namespace JSC
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