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/*
* Copyright (C) 2009-2023 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 "CallLinkInfoBase.h"
#include "ExceptionHelpers.h"
#include "JSFunction.h"
#include "Interpreter.h"
#include "ProtoCallFrameInlines.h"
#include "VMEntryScope.h"
#include "VMInlines.h"
#include <wtf/ForbidHeapAllocation.h>
#include <wtf/Scope.h>
namespace JSC {
class CachedCall : public CallLinkInfoBase {
WTF_MAKE_NONCOPYABLE(CachedCall);
WTF_FORBID_HEAP_ALLOCATION;
public:
CachedCall(JSGlobalObject* globalObject, JSFunction* function, int argumentCount)
: CallLinkInfoBase(CallSiteType::CachedCall)
, m_vm(globalObject->vm())
, m_entryScope(m_vm, function->scope()->globalObject())
, m_functionExecutable(function->jsExecutable())
, m_scope(function->scope())
{
VM& vm = m_vm;
auto scope = DECLARE_THROW_SCOPE(vm);
#if ASSERT_ENABLED
auto updateValidStatus = makeScopeExit([&] {
m_valid = !scope.exception();
});
#endif
ASSERT(!function->isHostFunctionNonInline());
if (UNLIKELY(!vm.isSafeToRecurseSoft())) {
throwStackOverflowError(globalObject, scope);
return;
}
if (UNLIKELY(vm.disallowVMEntryCount)) {
Interpreter::checkVMEntryPermission();
throwStackOverflowError(globalObject, scope);
return;
}
m_arguments.ensureCapacity(argumentCount);
if (UNLIKELY(m_arguments.hasOverflowed())) {
throwOutOfMemoryError(globalObject, scope);
return;
}
auto* newCodeBlock = m_vm.interpreter.prepareForCachedCall(*this, function);
if (UNLIKELY(scope.exception()))
return;
m_numParameters = newCodeBlock->numParameters();
m_protoCallFrame.init(newCodeBlock, function->globalObject(), function, jsUndefined(), argumentCount + 1, const_cast<EncodedJSValue*>(m_arguments.data()));
}
~CachedCall()
{
m_addressForCall = nullptr;
}
ALWAYS_INLINE JSValue call()
{
ASSERT(m_valid);
ASSERT(m_arguments.size() == static_cast<size_t>(m_protoCallFrame.argumentCount()));
return m_vm.interpreter.executeCachedCall(*this);
}
JSFunction* function()
{
ASSERT(m_valid);
return jsCast<JSFunction*>(m_protoCallFrame.calleeValue.unboxedCell());
}
FunctionExecutable* functionExecutable() { return m_functionExecutable; }
JSScope* scope() { return m_scope; }
void setThis(JSValue v) { m_protoCallFrame.setThisValue(v); }
void clearArguments() { m_arguments.clear(); }
void appendArgument(JSValue v) { m_arguments.append(v); }
bool hasOverflowedArguments() { return m_arguments.hasOverflowed(); }
void unlinkOrUpgradeImpl(VM&, CodeBlock* oldCodeBlock, CodeBlock* newCodeBlock)
{
if (isOnList())
remove();
if (newCodeBlock && m_protoCallFrame.codeBlock() == oldCodeBlock) {
newCodeBlock->m_shouldAlwaysBeInlined = false;
m_addressForCall = newCodeBlock->jitCode()->addressForCall();
m_protoCallFrame.setCodeBlock(newCodeBlock);
newCodeBlock->linkIncomingCall(nullptr, this);
return;
}
m_addressForCall = nullptr;
}
void relink()
{
VM& vm = m_vm;
auto scope = DECLARE_THROW_SCOPE(vm);
auto* codeBlock = m_vm.interpreter.prepareForCachedCall(*this, this->function());
RETURN_IF_EXCEPTION(scope, void());
m_protoCallFrame.setCodeBlock(codeBlock);
}
template<typename... Args>
ALWAYS_INLINE JSValue callWithArguments(JSGlobalObject* globalObject, JSValue thisValue, Args... args)
{
VM& vm = m_vm;
auto scope = DECLARE_THROW_SCOPE(vm);
#if CPU(ARM64) && CPU(ADDRESS64) && !ENABLE(C_LOOP)
constexpr unsigned argumentCountIncludingThis = 1 + sizeof...(args);
if constexpr (argumentCountIncludingThis <= 4) {
if (LIKELY(m_numParameters <= argumentCountIncludingThis)) {
JSValue result = m_vm.interpreter.tryCallWithArguments(*this, thisValue, args...);
RETURN_IF_EXCEPTION(scope, { });
if (result)
return result;
}
}
#endif
clearArguments();
setThis(thisValue);
(appendArgument(args), ...);
if (UNLIKELY(hasOverflowedArguments())) {
throwOutOfMemoryError(globalObject, scope);
return { };
}
RELEASE_AND_RETURN(scope, call());
}
private:
VM& m_vm;
VMEntryScope m_entryScope;
ProtoCallFrame m_protoCallFrame;
MarkedArgumentBuffer m_arguments;
FunctionExecutable* m_functionExecutable;
JSScope* m_scope;
void* m_addressForCall { nullptr };
unsigned m_numParameters { 0 };
#if ASSERT_ENABLED
bool m_valid { false };
#endif
friend class Interpreter;
};
} // namespace JSC
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