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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 "WasmBranchHints.h"
#include "WasmFormat.h"
#include <wtf/BitVector.h>
#include <wtf/HashMap.h>
namespace JSC { namespace Wasm {
struct ModuleInformation : public ThreadSafeRefCounted<ModuleInformation> {
using BranchHints = HashMap<uint32_t, BranchHintMap, IntHash<uint32_t>, WTF::UnsignedWithZeroKeyHashTraits<uint32_t>>;
ModuleInformation();
ModuleInformation(const ModuleInformation&) = delete;
ModuleInformation(ModuleInformation&&) = delete;
static Ref<ModuleInformation> create()
{
return adoptRef(*new ModuleInformation);
}
JS_EXPORT_PRIVATE ~ModuleInformation();
size_t functionIndexSpaceSize() const { return importFunctionTypeIndices.size() + internalFunctionTypeIndices.size(); }
bool isImportedFunctionFromFunctionIndexSpace(size_t functionIndex) const
{
ASSERT(functionIndex < functionIndexSpaceSize());
return functionIndex < importFunctionTypeIndices.size();
}
TypeIndex typeIndexFromFunctionIndexSpace(size_t functionIndex) const
{
return isImportedFunctionFromFunctionIndexSpace(functionIndex)
? importFunctionTypeIndices[functionIndex]
: internalFunctionTypeIndices[functionIndex - importFunctionTypeIndices.size()];
}
size_t exceptionIndexSpaceSize() const { return importExceptionTypeIndices.size() + internalExceptionTypeIndices.size(); }
bool isImportedExceptionFromExceptionIndexSpace(size_t exceptionIndex) const
{
ASSERT(exceptionIndex < exceptionIndexSpaceSize());
return exceptionIndex < importExceptionTypeIndices.size();
}
TypeIndex typeIndexFromExceptionIndexSpace(size_t exceptionIndex) const
{
return isImportedExceptionFromExceptionIndexSpace(exceptionIndex)
? importExceptionTypeIndices[exceptionIndex]
: internalExceptionTypeIndices[exceptionIndex - importExceptionTypeIndices.size()];
}
uint32_t importFunctionCount() const { return importFunctionTypeIndices.size(); }
uint32_t internalFunctionCount() const { return internalFunctionTypeIndices.size(); }
uint32_t importExceptionCount() const { return importExceptionTypeIndices.size(); }
uint32_t internalExceptionCount() const { return internalExceptionTypeIndices.size(); }
// Currently, our wasm implementation allows only one memory and table.
// If we need to remove this limitation, we would have MemoryInformation and TableInformation in the Vectors.
uint32_t memoryCount() const { return memory ? 1 : 0; }
uint32_t tableCount() const { return tables.size(); }
uint32_t elementCount() const { return elements.size(); }
uint32_t dataSegmentsCount() const { return numberOfDataSegments.value_or(0); }
const TableInformation& table(unsigned index) const { return tables[index]; }
const BitVector& referencedFunctions() const { return m_referencedFunctions; }
void addReferencedFunction(unsigned index) const { m_referencedFunctions.set(index); }
bool isDeclaredFunction(uint32_t index) const { return m_declaredFunctions.contains(index); }
void addDeclaredFunction(uint32_t index) { m_declaredFunctions.set(index); }
bool isDeclaredException(uint32_t index) const { return m_declaredExceptions.contains(index); }
void addDeclaredException(uint32_t index) { m_declaredExceptions.set(index); }
uint32_t typeCount() const { return typeSignatures.size(); }
bool hasMemoryImport() const { return memory.isImport(); }
BranchHint getBranchHint(uint32_t functionOffset, uint32_t branchOffset) const
{
auto it = branchHints.find(functionOffset);
return it == branchHints.end()
? BranchHint::Invalid
: it->value.getBranchHint(branchOffset);
}
Vector<Import> imports;
Vector<TypeIndex> importFunctionTypeIndices;
Vector<TypeIndex> internalFunctionTypeIndices;
Vector<TypeIndex> importExceptionTypeIndices;
Vector<TypeIndex> internalExceptionTypeIndices;
Vector<Ref<TypeDefinition>> typeSignatures;
MemoryInformation memory;
Vector<FunctionData> functions;
Vector<Export> exports;
std::optional<uint32_t> startFunctionIndexSpace;
Vector<Segment::Ptr> data;
Vector<Element> elements;
Vector<TableInformation> tables;
Vector<GlobalInformation> globals;
unsigned firstInternalGlobal { 0 };
uint32_t codeSectionSize { 0 };
Vector<CustomSection> customSections;
Ref<NameSection> nameSection;
BranchHints branchHints;
std::optional<uint32_t> numberOfDataSegments;
BitVector m_declaredFunctions;
BitVector m_declaredExceptions;
mutable BitVector m_referencedFunctions;
};
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY)
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