Source/JavaScriptCore/interpreter/MicrotaskCall.cpp

/*
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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#include "config.h"
#include "MicrotaskCall.h"

#include "CodeBlock.h"
#include "Interpreter.h"
#include "JSFunctionInlines.h"
#include "ThrowScope.h"

namespace JSC {

void MicrotaskCall::initialize(VM& vm, JSFunction* function)
{
    m_addressForCall = nullptr;
    m_functionExecutable = function->jsExecutable();
    relink(vm, function);
}

void MicrotaskCall::relink(VM& vm, JSFunction* function)
{
    auto scope = DECLARE_THROW_SCOPE(vm);

    // Unlink from any prior CodeBlock before we reset state.
    if (isOnList())
        remove();

    auto* newCodeBlock = vm.interpreter.prepareForMicrotaskCall(*this, function);
    RETURN_IF_EXCEPTION_WITH_TRAPS_DEFERRED(scope, void());
    m_codeBlock = newCodeBlock;
    m_numParameters = newCodeBlock->numParameters();
}

void MicrotaskCall::unlinkOrUpgradeImpl(VM&, CodeBlock* oldCodeBlock, CodeBlock* newCodeBlock)
{
    if (isOnList())
        remove();

    if (newCodeBlock && m_codeBlock == oldCodeBlock) {
        newCodeBlock->m_shouldAlwaysBeInlined = false;
        m_addressForCall = newCodeBlock->jitCode()->addressForCall();
        m_codeBlock = newCodeBlock;
        m_numParameters = newCodeBlock->numParameters();
        newCodeBlock->linkIncomingCall(nullptr, this);
        return;
    }
    m_addressForCall = nullptr;
}

} // namespace JSC