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/*
* Copyright (C) 2019 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 "WasmModuleInformation.h"
#include "WasmPlan.h"
#include "WasmStreamingParser.h"
#include <wtf/Function.h>
#include <wtf/SharedTask.h>
#include <wtf/ThreadSafeRefCounted.h>
#include <wtf/Vector.h>
namespace JSC {
class CallLinkInfo;
namespace Wasm {
class EntryPlan : public Plan, public StreamingParserClient {
public:
using Base = Plan;
// Note: CompletionTask should not hold a reference to the Plan otherwise there will be a reference cycle.
EntryPlan(VM&, Ref<ModuleInformation>, CompilerMode, CompletionTask&&);
JS_EXPORT_PRIVATE EntryPlan(VM&, Vector<uint8_t>&&, CompilerMode, CompletionTask&&);
~EntryPlan() override = default;
void prepare();
void compileFunctions(CompilationEffort);
Ref<ModuleInformation>&& takeModuleInformation()
{
RELEASE_ASSERT(!failed() && !hasWork());
return WTFMove(m_moduleInformation);
}
Vector<MacroAssemblerCodeRef<WasmEntryPtrTag>>&& takeWasmToWasmExitStubs()
{
RELEASE_ASSERT(!failed() && !hasWork());
return WTFMove(m_wasmToWasmExitStubs);
}
Vector<Vector<UnlinkedWasmToWasmCall>> takeWasmToWasmCallsites()
{
RELEASE_ASSERT(!failed() && !hasWork());
return WTFMove(m_unlinkedWasmToWasmCalls);
}
enum class State : uint8_t {
Initial,
Validated,
Prepared,
Compiled,
Completed // We should only move to Completed if we are holding the lock.
};
bool multiThreaded() const override { return m_state >= State::Prepared; }
private:
class ThreadCountHolder;
friend class ThreadCountHolder;
protected:
// For some reason friendship doesn't extend to parent classes...
using Base::m_lock;
bool parseAndValidateModule(const uint8_t*, size_t);
const char* stateString(State);
void moveToState(State);
bool isComplete() const override { return m_state == State::Completed; }
void complete() WTF_REQUIRES_LOCK(m_lock) override;
virtual bool prepareImpl() = 0;
virtual void compileFunction(uint32_t functionIndex) = 0;
virtual void didCompleteCompilation() WTF_REQUIRES_LOCK(m_lock) = 0;
template<typename T>
bool tryReserveCapacity(Vector<T>& vector, size_t size, const char* what)
{
if (UNLIKELY(!vector.tryReserveCapacity(size))) {
Locker locker { m_lock };
fail(WTF::makeString("Failed allocating enough space for "_s, size, what));
return false;
}
return true;
}
Vector<uint8_t> m_source;
Vector<MacroAssemblerCodeRef<WasmEntryPtrTag>> m_wasmToWasmExitStubs;
HashSet<uint32_t, DefaultHash<uint32_t>, WTF::UnsignedWithZeroKeyHashTraits<uint32_t>> m_exportedFunctionIndices;
Vector<Vector<UnlinkedWasmToWasmCall>> m_unlinkedWasmToWasmCalls;
StreamingParser m_streamingParser;
State m_state;
const CompilerMode m_compilerMode;
uint8_t m_numberOfActiveThreads { 0 };
uint32_t m_currentIndex { 0 };
uint32_t m_numberOfFunctions { 0 };
};
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY)
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