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/*
* Copyright (C) 2017 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 "MacroAssemblerCodeRef.h"
#include "WasmTierUpCount.h"
#include <wtf/Lock.h>
#include <wtf/RefPtr.h>
#include <wtf/SharedTask.h>
#include <wtf/ThreadSafeRefCounted.h>
#include <wtf/text/WTFString.h>
namespace JSC {
class VM;
namespace Wasm {
class Callee;
class BBQPlan;
class OMGPlan;
struct ModuleInformation;
struct UnlinkedWasmToWasmCall;
typedef void** WasmEntrypointLoadLocation;
enum class MemoryMode : uint8_t;
class CodeBlock : public ThreadSafeRefCounted<CodeBlock> {
public:
typedef void CallbackType(VM&, Ref<CodeBlock>&&);
using AsyncCompilationCallback = RefPtr<WTF::SharedTask<CallbackType>>;
static Ref<CodeBlock> create(MemoryMode mode, ModuleInformation& moduleInformation)
{
return adoptRef(*new CodeBlock(mode, moduleInformation));
}
void waitUntilFinished();
void compileAsync(VM&, AsyncCompilationCallback&&);
bool compilationFinished()
{
auto locker = holdLock(m_lock);
return !m_plan;
}
bool runnable() { return compilationFinished() && !m_errorMessage; }
// Note, we do this copy to ensure it's thread safe to have this
// called from multiple threads simultaneously.
String errorMessage()
{
ASSERT(!runnable());
CString cString = m_errorMessage.ascii();
return String(cString.data());
}
unsigned functionImportCount() const { return m_wasmToWasmExitStubs.size(); }
Callee& jsEntrypointCalleeFromFunctionIndexSpace(unsigned functionIndexSpace)
{
RELEASE_ASSERT(functionIndexSpace >= functionImportCount());
unsigned calleeIndex = functionIndexSpace - functionImportCount();
auto callee = m_jsCallees.get(calleeIndex);
RELEASE_ASSERT(callee);
return *callee;
}
Callee& wasmEntrypointCalleeFromFunctionIndexSpace(unsigned functionIndexSpace)
{
RELEASE_ASSERT(functionIndexSpace >= functionImportCount());
unsigned calleeIndex = functionIndexSpace - functionImportCount();
if (m_optimizedCallees[calleeIndex])
return *m_optimizedCallees[calleeIndex].get();
return *m_callees[calleeIndex].get();
}
WasmEntrypointLoadLocation wasmEntrypointLoadLocationFromFunctionIndexSpace(unsigned functionIndexSpace)
{
RELEASE_ASSERT(functionIndexSpace >= functionImportCount());
unsigned calleeIndex = functionIndexSpace - functionImportCount();
return &m_wasmIndirectCallEntryPoints[calleeIndex];
}
TierUpCount& tierUpCount(uint32_t functionIndex)
{
return m_tierUpCounts[functionIndex];
}
bool isSafeToRun(MemoryMode);
MemoryMode mode() const { return m_mode; }
~CodeBlock();
private:
friend class OMGPlan;
CodeBlock(MemoryMode, ModuleInformation&);
unsigned m_calleeCount;
MemoryMode m_mode;
Vector<RefPtr<Callee>> m_callees;
Vector<RefPtr<Callee>> m_optimizedCallees;
HashMap<uint32_t, RefPtr<Callee>, typename DefaultHash<uint32_t>::Hash, WTF::UnsignedWithZeroKeyHashTraits<uint32_t>> m_jsCallees;
Vector<void*> m_wasmIndirectCallEntryPoints;
Vector<TierUpCount> m_tierUpCounts;
Vector<Vector<UnlinkedWasmToWasmCall>> m_wasmToWasmCallsites;
Vector<MacroAssemblerCodeRef> m_wasmToWasmExitStubs;
RefPtr<BBQPlan> m_plan;
String m_errorMessage;
Lock m_lock;
};
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY)
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