Tools/TestWebKitAPI/Tests/JavaScriptCore/PropertySlot.cpp

/*
 * Copyright (C) 2020 Apple Inc. All rights reserved.
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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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 * 1. Redistributions of source code must retain the above copyright
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#include "config.h"
#include <JavaScriptCore/InitializeThreading.h>
#include <JavaScriptCore/JSCJSValueInlines.h>
#include <JavaScriptCore/PropertySlot.h>
#include <JavaScriptCore/VM.h>

namespace TestWebKitAPI {

using JSC::JSLockHolder;
using JSC::LargeHeap;
using JSC::PropertySlot;
using JSC::VM;
using JSC::jsUndefined;

TEST(JavaScriptCore_PropertySlot, DisallowVMEntryCountBasic)
{
    WTF::initializeMainThread();
    JSC::initialize();

    VM& vm = VM::create(LargeHeap).leakRef();
    {
        JSLockHolder locker(vm);
        EXPECT_EQ(vm.disallowVMEntryCount, 0u);
        {
            PropertySlot slot(jsUndefined(), PropertySlot::InternalMethodType::Get);
            EXPECT_FALSE(!!slot.disallowVMEntry);
            EXPECT_EQ(vm.disallowVMEntryCount, 0u);
        }
        EXPECT_EQ(vm.disallowVMEntryCount, 0u);
        {
            PropertySlot slot(jsUndefined(), PropertySlot::InternalMethodType::HasProperty);
            EXPECT_FALSE(!!slot.disallowVMEntry);
            EXPECT_EQ(vm.disallowVMEntryCount, 0u);
        }
        EXPECT_EQ(vm.disallowVMEntryCount, 0u);
        {
            PropertySlot slot(jsUndefined(), PropertySlot::InternalMethodType::GetOwnProperty);
            EXPECT_FALSE(!!slot.disallowVMEntry);
            EXPECT_EQ(vm.disallowVMEntryCount, 0u);
        }
        EXPECT_EQ(vm.disallowVMEntryCount, 0u);
        {
            PropertySlot slot(jsUndefined(), PropertySlot::InternalMethodType::VMInquiry, &vm);
            EXPECT_TRUE(!!slot.disallowVMEntry);
            EXPECT_EQ(vm.disallowVMEntryCount, 1u);
        }
        EXPECT_EQ(vm.disallowVMEntryCount, 0u);
    }
}

TEST(JavaScriptCore_PropertySlot, VMInquiryReset)
{
    WTF::initializeMainThread();
    JSC::initialize();

    VM& vm = VM::create(LargeHeap).leakRef();
    {
        JSLockHolder locker(vm);
        EXPECT_EQ(vm.disallowVMEntryCount, 0u);

        {
            PropertySlot slot(jsUndefined(), PropertySlot::InternalMethodType::VMInquiry, &vm);
            EXPECT_TRUE(!!slot.disallowVMEntry);
            EXPECT_EQ(vm.disallowVMEntryCount, 1u);

            slot.disallowVMEntry.reset();
            EXPECT_FALSE(!!slot.disallowVMEntry);
            EXPECT_EQ(vm.disallowVMEntryCount, 0u);
        }

        EXPECT_EQ(vm.disallowVMEntryCount, 0u);
    }
}

TEST(JavaScriptCore_PropertySlot, CopyAssignment)
{
    WTF::initializeMainThread();
    JSC::initialize();

    VM& vm = VM::create(LargeHeap).leakRef();
    {
        JSLockHolder locker(vm);
        EXPECT_EQ(vm.disallowVMEntryCount, 0u);

        {
            PropertySlot slot(jsUndefined(), PropertySlot::InternalMethodType::Get);
            EXPECT_FALSE(slot.isVMInquiry());
            EXPECT_FALSE(!!slot.disallowVMEntry);
            EXPECT_EQ(vm.disallowVMEntryCount, 0u);

            {
                PropertySlot slot2 = slot;
                EXPECT_FALSE(slot.isVMInquiry());
                EXPECT_FALSE(!!slot.disallowVMEntry);
                EXPECT_EQ(vm.disallowVMEntryCount, 0u);

                slot = slot2;
                EXPECT_FALSE(slot.isVMInquiry());
                EXPECT_FALSE(!!slot.disallowVMEntry);
                EXPECT_EQ(vm.disallowVMEntryCount, 0u);
            }

            EXPECT_FALSE(slot.isVMInquiry());
            EXPECT_FALSE(!!slot.disallowVMEntry);
            EXPECT_EQ(vm.disallowVMEntryCount, 0u);
        }

        EXPECT_EQ(vm.disallowVMEntryCount, 0u);

        {
            PropertySlot slot(jsUndefined(), PropertySlot::InternalMethodType::VMInquiry, &vm);
            EXPECT_TRUE(slot.isVMInquiry());
            EXPECT_TRUE(!!slot.disallowVMEntry);
            EXPECT_EQ(vm.disallowVMEntryCount, 1u);

            {
                PropertySlot slot2 = slot;
                EXPECT_TRUE(slot2.isVMInquiry());
                EXPECT_TRUE(!!slot2.disallowVMEntry);
                EXPECT_EQ(vm.disallowVMEntryCount, 2u);

                slot = slot2;
                EXPECT_TRUE(slot.isVMInquiry());
                EXPECT_TRUE(!!slot.disallowVMEntry);
                EXPECT_EQ(vm.disallowVMEntryCount, 2u);
            }

            EXPECT_TRUE(slot.isVMInquiry());
            EXPECT_TRUE(!!slot.disallowVMEntry);
            EXPECT_EQ(vm.disallowVMEntryCount, 1u);
        }

        EXPECT_EQ(vm.disallowVMEntryCount, 0u);
    }
}

} // namespace TestWebKitAPI