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/*
* Copyright (C) 2017-2018 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 "WasmCallee.h"
#include "WasmEmbedder.h"
#include <wtf/CrossThreadCopier.h>
#include <wtf/Lock.h>
#include <wtf/RefPtr.h>
#include <wtf/SharedTask.h>
#include <wtf/ThreadSafeRefCounted.h>
#include <wtf/text/WTFString.h>
namespace JSC {
namespace Wasm {
struct Context;
class EntryPlan;
struct ModuleInformation;
struct UnlinkedWasmToWasmCall;
enum class MemoryMode : uint8_t;
// FIXME: Rename this, since it's not a CodeBlock
// https://bugs.webkit.org/show_bug.cgi?id=203694
class CodeBlock : public ThreadSafeRefCounted<CodeBlock> {
public:
typedef void CallbackType(Ref<CodeBlock>&&);
using AsyncCompilationCallback = RefPtr<WTF::SharedTask<CallbackType>>;
static Ref<CodeBlock> create(Context*, MemoryMode, ModuleInformation&, RefPtr<LLIntCallees>);
void waitUntilFinished();
void compileAsync(Context*, AsyncCompilationCallback&&);
bool compilationFinished()
{
return m_compilationFinished.load();
}
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());
return crossThreadCopy(m_errorMessage);
}
unsigned functionImportCount() const { return m_wasmToWasmExitStubs.size(); }
// These two callee getters are only valid once the callees have been populated.
Callee& embedderEntrypointCalleeFromFunctionIndexSpace(unsigned functionIndexSpace)
{
ASSERT(runnable());
RELEASE_ASSERT(functionIndexSpace >= functionImportCount());
unsigned calleeIndex = functionIndexSpace - functionImportCount();
auto callee = m_embedderCallees.get(calleeIndex);
RELEASE_ASSERT(callee);
return *callee;
}
Callee& wasmEntrypointCalleeFromFunctionIndexSpace(unsigned functionIndexSpace)
{
ASSERT(runnable());
RELEASE_ASSERT(functionIndexSpace >= functionImportCount());
unsigned calleeIndex = functionIndexSpace - functionImportCount();
#if ENABLE(WEBASSEMBLY_B3JIT)
if (m_omgCallees[calleeIndex])
return *m_omgCallees[calleeIndex].get();
if (m_bbqCallees[calleeIndex])
return *m_bbqCallees[calleeIndex].get();
#endif
return m_llintCallees->at(calleeIndex).get();
}
#if ENABLE(WEBASSEMBLY_B3JIT)
BBQCallee& wasmBBQCalleeFromFunctionIndexSpace(unsigned functionIndexSpace)
{
ASSERT(runnable());
RELEASE_ASSERT(functionIndexSpace >= functionImportCount());
unsigned calleeIndex = functionIndexSpace - functionImportCount();
return *m_bbqCallees[calleeIndex].get();
}
#endif
MacroAssemblerCodePtr<WasmEntryPtrTag>* entrypointLoadLocationFromFunctionIndexSpace(unsigned functionIndexSpace)
{
RELEASE_ASSERT(functionIndexSpace >= functionImportCount());
unsigned calleeIndex = functionIndexSpace - functionImportCount();
return &m_wasmIndirectCallEntryPoints[calleeIndex];
}
MacroAssemblerCodePtr<WasmEntryPtrTag> wasmToWasmExitStub(unsigned functionIndex)
{
return m_wasmToWasmExitStubs[functionIndex].code();
}
bool isSafeToRun(MemoryMode);
MemoryMode mode() const { return m_mode; }
~CodeBlock();
private:
friend class Plan;
#if ENABLE(WEBASSEMBLY_B3JIT)
friend class BBQPlan;
friend class OMGPlan;
friend class OMGForOSREntryPlan;
#endif
CodeBlock(Context*, MemoryMode, ModuleInformation&, RefPtr<LLIntCallees>);
void setCompilationFinished();
unsigned m_calleeCount;
MemoryMode m_mode;
#if ENABLE(WEBASSEMBLY_B3JIT)
Vector<RefPtr<OMGCallee>> m_omgCallees;
Vector<RefPtr<BBQCallee>> m_bbqCallees;
#endif
RefPtr<LLIntCallees> m_llintCallees;
HashMap<uint32_t, RefPtr<EmbedderEntrypointCallee>, DefaultHash<uint32_t>, WTF::UnsignedWithZeroKeyHashTraits<uint32_t>> m_embedderCallees;
Vector<MacroAssemblerCodePtr<WasmEntryPtrTag>> m_wasmIndirectCallEntryPoints;
Vector<Vector<UnlinkedWasmToWasmCall>> m_wasmToWasmCallsites;
Vector<MacroAssemblerCodeRef<WasmEntryPtrTag>> m_wasmToWasmExitStubs;
RefPtr<EntryPlan> m_plan;
std::atomic<bool> m_compilationFinished { false };
String m_errorMessage;
Lock m_lock;
};
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY)
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