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/*
* Copyright (C) 2015-2023 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.
*/
#pragma once
#include "Debugger.h"
#include "EntryFrame.h"
#include "FuzzerAgent.h"
#include "ProfilerDatabase.h"
#include "SideDataRepository.h"
#include "VM.h"
#include "Watchdog.h"
namespace JSC {
inline ActiveScratchBufferScope::ActiveScratchBufferScope(ScratchBuffer* buffer, size_t activeScratchBufferSizeInJSValues)
: m_scratchBuffer(buffer)
{
// Tell GC mark phase how much of the scratch buffer is active during the call operation this scope is used in.
if (m_scratchBuffer)
m_scratchBuffer->setActiveLength(activeScratchBufferSizeInJSValues * sizeof(EncodedJSValue));
}
inline ActiveScratchBufferScope::~ActiveScratchBufferScope()
{
// Tell the GC that we're not using the scratch buffer anymore.
if (m_scratchBuffer)
m_scratchBuffer->setActiveLength(0);
}
bool VM::ensureStackCapacityFor(Register* newTopOfStack)
{
#if !ENABLE(C_LOOP)
return newTopOfStack >= m_softStackLimit;
#else
return ensureStackCapacityForCLoop(newTopOfStack);
#endif
}
bool VM::isSafeToRecurseSoft() const
{
bool safe = isSafeToRecurse(m_softStackLimit);
#if ENABLE(C_LOOP)
safe = safe && isSafeToRecurseSoftCLoop();
#endif
return safe;
}
template<typename Func>
void VM::logEvent(CodeBlock* codeBlock, const char* summary, const Func& func)
{
if (LIKELY(!m_perBytecodeProfiler))
return;
m_perBytecodeProfiler->logEvent(codeBlock, summary, func());
}
inline CallFrame* VM::topJSCallFrame() const
{
CallFrame* frame = topCallFrame;
if (UNLIKELY(!frame))
return frame;
if (LIKELY(!frame->isNativeCalleeFrame() && !frame->isPartiallyInitializedFrame()))
return frame;
EntryFrame* entryFrame = topEntryFrame;
do {
frame = frame->callerFrame(entryFrame);
ASSERT(!frame || !frame->isPartiallyInitializedFrame());
} while (frame && frame->isNativeCalleeFrame());
return frame;
}
inline void VM::setFuzzerAgent(std::unique_ptr<FuzzerAgent>&& fuzzerAgent)
{
RELEASE_ASSERT_WITH_MESSAGE(!m_fuzzerAgent, "Only one FuzzerAgent can be specified at a time.");
m_fuzzerAgent = WTFMove(fuzzerAgent);
}
template<typename Func>
inline void VM::forEachDebugger(const Func& callback)
{
if (LIKELY(m_debuggers.isEmpty()))
return;
for (auto* debugger = m_debuggers.head(); debugger; debugger = debugger->next())
callback(*debugger);
}
template<typename Type, typename Functor>
Type& VM::ensureSideData(void* key, const Functor& functor)
{
m_hasSideData = true;
return sideDataRepository().ensure<Type>(this, key, functor);
}
} // namespace JSC
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