Source/JavaScriptCore/interpreter/CachedCall.cpp

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#include "config.h"
#include "CachedCall.h"

#include "ExceptionHelpers.h"
#include "Interpreter.h"
#include "JSFunction.h"
#include "ThrowScope.h"
#include "VMEntryScope.h"
#include <wtf/Scope.h>

namespace JSC {

CachedCall::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 (!vm.isSafeToRecurseSoft()) [[unlikely]] {
        throwStackOverflowError(globalObject, scope);
        return;
    }

    if (vm.disallowVMEntryCount) [[unlikely]] {
        Interpreter::checkVMEntryPermission();
        throwStackOverflowError(globalObject, scope);
        return;
    }

    m_arguments.ensureCapacity(argumentCount);
    if (m_arguments.hasOverflowed()) [[unlikely]] {
        throwOutOfMemoryError(globalObject, scope);
        return;
    }

    auto* newCodeBlock = m_vm.interpreter.prepareForCachedCall(*this, function);
    if (scope.exception()) [[unlikely]]
        return;
    m_numParameters = newCodeBlock->numParameters();
    m_protoCallFrame.init(newCodeBlock, function->globalObject(), function, jsUndefined(), nullptr, argumentCount + 1, const_cast<EncodedJSValue*>(m_arguments.data()));
}

void CachedCall::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);
}

} // namespace JSC