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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 <wtf/CheckedArithmetic.h>
#include <wtf/FastMalloc.h>
#include <wtf/text/MakeString.h>
namespace JSC { namespace Wasm {
constexpr CalleeBits NullWasmCallee = CalleeBits::nullCallee();
Segment::Ptr Segment::create(std::optional<I32InitExpr> offset, uint32_t sizeInBytes, Kind kind)
{
CheckedUint32 totalBytesChecked = sizeInBytes;
totalBytesChecked += sizeof(Segment);
if (totalBytesChecked.hasOverflowed())
return Ptr(nullptr, &Segment::destroy);
auto allocated = tryFastCalloc(totalBytesChecked, 1);
Segment* segment;
if (!allocated.getValue(segment))
return Ptr(nullptr, &Segment::destroy);
ASSERT(kind == Kind::Passive || !!offset);
segment->kind = kind;
segment->offsetIfActive = WTFMove(offset);
segment->sizeInBytes = sizeInBytes;
return Ptr(segment, &Segment::destroy);
}
void Segment::destroy(Segment *segment)
{
fastFree(segment);
}
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(jsDynamicCast<JSWebAssemblyStruct*>(value));
if (isArrayref(expectedType))
ASSERT(jsDynamicCast<JSWebAssemblyArray*>(value));
if (isRefWithTypeIndex(expectedType)) {
RefPtr<const RTT> expectedRTT = Wasm::TypeInformation::getCanonicalRTT(expectedType.index);
if (expectedRTT->kind() == RTTKind::Function) {
ASSERT(jsDynamicCast<JSFunction*>(value));
return;
}
auto objectPtr = jsCast<WebAssemblyGCObjectBase*>(value);
auto objectRTT = objectPtr->rtt();
ASSERT(objectRTT->isSubRTT(*expectedRTT.get()));
}
}
}
#endif
} } // 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)
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