mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
125 lines
4.1 KiB
C++
125 lines
4.1 KiB
C++
/*
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* Copyright (C) 2019-2020 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "Gate.h"
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#include "Opcode.h"
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#include "OptionsList.h"
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#include <wtf/WTFConfig.h>
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namespace JSC {
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class ExecutableAllocator;
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class FixedVMPoolExecutableAllocator;
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class VM;
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#if ENABLE(SEPARATED_WX_HEAP)
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using JITWriteSeparateHeapsFunction = void (*)(off_t, const void*, size_t);
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#endif
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struct Config {
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static Config& singleton();
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JS_EXPORT_PRIVATE static void disableFreezingForTesting();
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JS_EXPORT_PRIVATE static void enableRestrictedOptions();
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static void permanentlyFreeze() { WTF::Config::permanentlyFreeze(); }
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static void configureForTesting()
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{
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WTF::setPermissionsOfConfigPage();
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disableFreezingForTesting();
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enableRestrictedOptions();
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}
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bool isPermanentlyFrozen() { return g_wtfConfig.isPermanentlyFrozen; }
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// All the fields in this struct should be chosen such that their
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// initial value is 0 / null / falsy because Config is instantiated
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// as a global singleton.
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bool disabledFreezingForTesting;
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bool restrictedOptionsEnabled;
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bool jitDisabled;
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// The following HasBeenCalled flags are for auditing call_once initialization functions.
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bool initializeHasBeenCalled;
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struct {
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#if ASSERT_ENABLED
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bool canUseJITIsSet;
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#endif
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bool canUseJIT;
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} vm;
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ExecutableAllocator* executableAllocator;
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FixedVMPoolExecutableAllocator* fixedVMPoolExecutableAllocator;
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void* startExecutableMemory;
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void* endExecutableMemory;
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uintptr_t startOfFixedWritableMemoryPool;
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#if ENABLE(SEPARATED_WX_HEAP)
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JITWriteSeparateHeapsFunction jitWriteSeparateHeaps;
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#endif
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OptionsStorage options;
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void (*shellTimeoutCheckCallback)(VM&);
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struct {
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uint8_t exceptionInstructions[maxOpcodeLength + 1];
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uint8_t wasmExceptionInstructions[maxOpcodeLength + 1];
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const void* gateMap[numberOfGates];
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} llint;
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#if CPU(ARM64E) && ENABLE(PTRTAG_DEBUGGING)
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WTF::PtrTagLookup ptrTagLookupRecord;
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#endif
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};
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#if ENABLE(UNIFIED_AND_FREEZABLE_CONFIG_RECORD)
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constexpr size_t alignmentOfJSCConfig = std::alignment_of<JSC::Config>::value;
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static_assert(WTF::offsetOfWTFConfigExtension + sizeof(JSC::Config) <= WTF::ConfigSizeToProtect);
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static_assert(roundUpToMultipleOf<alignmentOfJSCConfig>(WTF::offsetOfWTFConfigExtension) == WTF::offsetOfWTFConfigExtension);
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#define g_jscConfig (*bitwise_cast<JSC::Config*>(&g_wtfConfig.spaceForExtensions))
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#else // not ENABLE(UNIFIED_AND_FREEZABLE_CONFIG_RECORD)
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extern "C" JS_EXPORT_PRIVATE Config g_jscConfig;
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#endif // ENABLE(UNIFIED_AND_FREEZABLE_CONFIG_RECORD)
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constexpr size_t offsetOfJSCConfigInitializeHasBeenCalled = offsetof(JSC::Config, initializeHasBeenCalled);
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constexpr size_t offsetOfJSCConfigGateMap = offsetof(JSC::Config, llint.gateMap);
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} // namespace JSC
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#if !ENABLE(UNIFIED_AND_FREEZABLE_CONFIG_RECORD)
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using JSC::g_jscConfig;
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#endif
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