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/*
* Copyright (C) 2016-2023 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(WEBASSEMBLY)
#include "ArrayBuffer.h"
#include "MemoryMode.h"
#include "PageCount.h"
#include "WeakGCSet.h"
#include <wtf/CagedPtr.h>
#include <wtf/Expected.h>
#include <wtf/Function.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/ThreadSafeWeakPtr.h>
#include <wtf/Vector.h>
namespace WTF {
class PrintStream;
}
namespace JSC {
class LLIntOffsetsExtractor;
namespace Wasm {
class Memory final : public RefCounted<Memory> {
WTF_MAKE_NONCOPYABLE(Memory);
WTF_MAKE_TZONE_ALLOCATED_EXPORT(Memory, JS_EXPORT_PRIVATE);
friend LLIntOffsetsExtractor;
public:
using JSWebAssemblyInstanceWeakCGSet = WeakGCSet<JSWebAssemblyInstance>;
void dump(WTF::PrintStream&) const;
enum NotifyPressure { NotifyPressureTag };
enum SyncTryToReclaim { SyncTryToReclaimTag };
enum GrowSuccess { GrowSuccessTag };
static Ref<Memory> create(VM&);
JS_EXPORT_PRIVATE static Ref<Memory> create(VM&, Ref<BufferMemoryHandle>&&, WTF::Function<void(GrowSuccess, PageCount, PageCount)>&& growSuccessCallback);
JS_EXPORT_PRIVATE static Ref<Memory> create(VM&, Ref<SharedArrayBufferContents>&&, WTF::Function<void(GrowSuccess, PageCount, PageCount)>&& growSuccessCallback);
JS_EXPORT_PRIVATE static Ref<Memory> createZeroSized(VM&, MemorySharingMode, WTF::Function<void(GrowSuccess, PageCount, PageCount)>&& growSuccessCallback);
static RefPtr<Memory> tryCreate(VM&, PageCount initial, PageCount maximum, MemorySharingMode, std::optional<MemoryMode> desiredMemoryMode, WTF::Function<void(GrowSuccess, PageCount, PageCount)>&& growSuccessCallback);
JS_EXPORT_PRIVATE ~Memory();
static size_t fastMappedRedzoneBytes() { return BufferMemoryHandle::fastMappedRedzoneBytes(); }
static size_t fastMappedBytes() { return BufferMemoryHandle::fastMappedBytes(); } // Includes redzone.
static bool addressIsInGrowableOrFastMemory(void*);
void* basePointer() const { return m_handle->memory(); }
size_t size() const { return m_handle->size(); }
size_t mappedCapacity() const { return m_handle->mappedCapacity(); }
PageCount initial() const { return m_handle->initial(); }
PageCount maximum() const { return m_handle->maximum(); }
BufferMemoryHandle& handle() { return m_handle.get(); }
MemorySharingMode sharingMode() const { return m_handle->sharingMode(); }
MemoryMode mode() const { return m_handle->mode(); }
Expected<PageCount, GrowFailReason> grow(VM&, PageCount);
bool fill(uint32_t, uint8_t, uint32_t);
bool copy(uint32_t, uint32_t, uint32_t);
bool init(uint32_t, const uint8_t*, uint32_t);
void registerInstance(JSWebAssemblyInstance&);
void checkLifetime() { ASSERT(!deletionHasBegun()); }
static constexpr ptrdiff_t offsetOfHandle() { return OBJECT_OFFSETOF(Memory, m_handle); }
SharedArrayBufferContents* shared() const { return m_shared.get(); }
private:
Memory(VM&);
Memory(VM&, Ref<BufferMemoryHandle>&&, WTF::Function<void(GrowSuccess, PageCount, PageCount)>&& growSuccessCallback);
Memory(VM&, Ref<BufferMemoryHandle>&&, Ref<SharedArrayBufferContents>&&, WTF::Function<void(GrowSuccess, PageCount, PageCount)>&& growSuccessCallback);
Memory(VM&, PageCount initial, PageCount maximum, MemorySharingMode, WTF::Function<void(GrowSuccess, PageCount, PageCount)>&& growSuccessCallback);
Expected<PageCount, GrowFailReason> growShared(VM&, PageCount);
Ref<BufferMemoryHandle> m_handle;
RefPtr<SharedArrayBufferContents> m_shared;
WTF::Function<void(GrowSuccess, PageCount, PageCount)> m_growSuccessCallback;
// FIXME: If/When merging this into JSWebAssemblyMemory we should just use an unconditionalFinalizer.
JSWebAssemblyInstanceWeakCGSet m_instances;
};
} } // namespace JSC::Wasm
#else
namespace JSC { namespace Wasm {
class Memory {
public:
static bool addressIsInGrowableOrFastMemory(void*) { return false; }
};
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY)
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