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/*
* Copyright (C) 2015-2018 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 "CallFrameInlines.h"
#include "EntryFrame.h"
#include "ProfilerDatabase.h"
#include "VM.h"
#include "Watchdog.h"
namespace JSC {
bool VM::ensureStackCapacityFor(Register* newTopOfStack)
{
#if !ENABLE(C_LOOP)
ASSERT(Thread::current().stack().isGrowingDownward());
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->isWasmFrame() && !frame->isStackOverflowFrame()))
return frame;
EntryFrame* entryFrame = topEntryFrame;
do {
frame = frame->callerFrame(entryFrame);
ASSERT(!frame || !frame->isStackOverflowFrame());
} while (frame && frame->isWasmFrame());
return frame;
}
} // namespace JSC