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Copy pathWasmFormat.cpp
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141 lines (118 loc) · 4.35 KB
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/*
* Copyright (C) 2016-2017 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.
*/
#include "config.h"
#include "WasmFormat.h"
#if ENABLE(WEBASSEMBLY)
#include "HeapVerifier.h"
#include "JSWebAssemblyArray.h"
#include "JSWebAssemblyStruct.h"
#include "WasmCallee.h"
#include <wtf/FastMalloc.h>
#include <wtf/TZoneMallocInlines.h>
#include <wtf/text/MakeString.h>
namespace JSC { namespace Wasm {
WTF_MAKE_TZONE_ALLOCATED_IMPL(BlockSignature);
bool WasmCallableFunction::isJS() const
{
return boxedCallee == CalleeBits { &WasmToJSCallee::singleton() };
}
std::unique_ptr<Segment> Segment::tryCreate(std::optional<I32InitExpr> offset, uint32_t sizeInBytes, Kind kind, uint32_t memoryIndex)
{
auto result = tryFastZeroedMalloc(allocationSize(sizeInBytes));
void* memory;
if (!result.getValue(memory))
return nullptr;
ASSERT(kind == Kind::Passive || !!offset);
return std::unique_ptr<Segment>(new (memory) Segment(sizeInBytes, kind, WTF::move(offset), memoryIndex));
}
String makeString(const Name& characters)
{
return WTF::makeString(characters);
}
#if ASSERT_ENABLED
void validateWasmValue(uint64_t wasmValue, Type expectedType)
{
// FIXME: Add more validations
auto value = std::bit_cast<JSValue>(wasmValue);
if (isRefType(expectedType)) {
if (value.isNull()) {
ASSERT(expectedType.isNullable());
return;
}
if (isExternref(expectedType)) {
if (value.isCell())
HeapVerifier::validateCell(value.asCell());
}
if (isI31ref(expectedType))
ASSERT(value.isInt32());
if (isStructref(expectedType))
ASSERT(is<JSWebAssemblyStruct>(value));
if (isArrayref(expectedType))
ASSERT(is<JSWebAssemblyArray>(value));
if (isRefWithTypeIndex(expectedType)) {
auto expectedRTT = Wasm::TypeInformation::getCanonicalRTT(expectedType.index());
if (expectedRTT->kind() == RTTKind::Function) {
ASSERT(is<JSFunction>(value));
return;
}
auto objectPtr = uncheckedDowncast<WebAssemblyGCObjectBase>(value);
auto& objectRTT = objectPtr->rtt();
ASSERT(objectRTT.isSubRTT(expectedRTT.get()));
}
}
}
#endif
void BlockSignature::dump(PrintStream& out) const
{
{
out.print("("_s);
CommaPrinter comma;
for (FunctionArgCount arg = 0; arg < argumentCount(); ++arg)
out.print(comma, makeString(argumentType(arg).kind()));
out.print(")"_s);
}
{
CommaPrinter comma;
out.print(" -> ["_s);
for (FunctionArgCount ret = 0; ret < returnCount(); ++ret)
out.print(comma, makeString(returnType(ret).kind()));
out.print("]"_s);
}
}
} } // namespace JSC::Wasm
namespace WTF {
void printInternal(PrintStream& out, JSC::Wasm::TableElementType type)
{
switch (type) {
case JSC::Wasm::TableElementType::Externref:
out.print("Externref");
break;
case JSC::Wasm::TableElementType::Funcref:
out.print("Funcref");
break;
}
}
} // namespace WTF
#endif // ENABLE(WEBASSEMBLY)