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/*
* Copyright (C) 2013-2023 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 INC. OR
* 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 "VMEntryScope.h"
#include "Options.h"
#include "SamplingProfiler.h"
#include "VM.h"
#include "VMEntryScopeInlines.h"
#include "WasmCapabilities.h"
#include "WasmMachineThreads.h"
#include "Watchdog.h"
#include <wtf/WTFConfig.h>
namespace JSC {
void VMEntryScope::setUpSlow()
{
m_vm.entryScope = this;
auto& thread = Thread::current();
if (UNLIKELY(!thread.isJSThread())) {
Thread::registerJSThread(thread);
if (Wasm::isSupported())
Wasm::startTrackingCurrentThread();
#if HAVE(MACH_EXCEPTIONS)
if (g_wtfConfig.signalHandlers.initState == WTF::SignalHandlers::InitState::AddedHandlers)
registerThreadForMachExceptionHandling(thread);
#endif
}
if (UNLIKELY(m_vm.hasAnyEntryScopeServiceRequest() || m_vm.hasTimeZoneChange()))
m_vm.executeEntryScopeServicesOnEntry();
}
void VMEntryScope::tearDownSlow()
{
ASSERT_WITH_MESSAGE(!m_vm.hasCheckpointOSRSideState(), "Exitting the VM but pending checkpoint side state still available");
m_vm.entryScope = nullptr;
if (UNLIKELY(m_vm.hasAnyEntryScopeServiceRequest()))
m_vm.executeEntryScopeServicesOnExit();
}
} // namespace JSC
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