mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 12:19:46 +00:00
109 lines
3.2 KiB
C++
109 lines
3.2 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 "JSCJSValue.h"
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#include "StructureIDTable.h"
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#include <wtf/Gigacage.h>
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#include <wtf/Lock.h>
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namespace JSC {
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class JSCell;
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class VM;
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namespace Integrity {
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enum class AuditLevel {
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None,
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Minimal,
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Full,
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Random,
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};
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#ifdef NDEBUG
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static constexpr AuditLevel DefaultAuditLevel = AuditLevel::None;
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#else
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static constexpr AuditLevel DefaultAuditLevel = AuditLevel::Random;
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#endif
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class Random {
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public:
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Random(VM&);
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ALWAYS_INLINE bool shouldAudit(VM&);
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private:
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JS_EXPORT_PRIVATE bool reloadAndCheckShouldAuditSlow(VM&);
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uint64_t m_triggerBits;
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Lock m_lock;
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// The top bit is reserved as a termination bit. Hence, the number of
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// trigger bits is always 1 less than will fit in m_triggerBits.
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static constexpr int numberOfTriggerBits = (sizeof(m_triggerBits) * CHAR_BIT) - 1;
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};
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ALWAYS_INLINE void auditCellRandomly(VM&, JSCell*);
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ALWAYS_INLINE void auditCellMinimally(VM&, JSCell*);
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JS_EXPORT_PRIVATE void auditCellMinimallySlow(VM&, JSCell*);
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JS_EXPORT_PRIVATE void auditCellFully(VM&, JSCell*);
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template<AuditLevel = AuditLevel::Random, typename T>
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ALWAYS_INLINE void auditCell(VM&, T) { }
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template<AuditLevel auditLevel = DefaultAuditLevel>
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ALWAYS_INLINE void auditCell(VM& vm, JSCell* cell)
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{
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switch (auditLevel) {
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case AuditLevel::None:
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return;
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case AuditLevel::Minimal:
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return auditCellMinimally(vm, cell);
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case AuditLevel::Full:
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return auditCellFully(vm, cell);
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case AuditLevel::Random:
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return auditCellRandomly(vm, cell);
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}
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}
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template<AuditLevel auditLevel = DefaultAuditLevel>
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ALWAYS_INLINE void auditCell(VM& vm, JSValue value)
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{
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if (auditLevel == AuditLevel::None)
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return;
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if (value.isCell())
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auditCell<auditLevel>(vm, value.asCell());
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}
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ALWAYS_INLINE void auditStructureID(StructureIDTable&, StructureID);
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ALWAYS_INLINE void auditStructureID(VM&, StructureID);
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} // namespace Integrity
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} // namespace JSC
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