blob: 1ae1e3a92bc9dfd9d1f0a9ae3b1089c9f5063128 [file] [log] [blame]
/*
* 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 <wtf/CheckedArithmetic.h>
#include <wtf/FastMalloc.h>
namespace JSC { namespace Wasm {
Segment* Segment::create(I32InitExpr offset, uint32_t sizeInBytes)
{
Checked<uint32_t, RecordOverflow> totalBytesChecked = sizeInBytes;
totalBytesChecked += sizeof(Segment);
uint32_t totalBytes;
if (totalBytesChecked.safeGet(totalBytes) == CheckedState::DidOverflow)
return nullptr;
auto allocated = tryFastCalloc(totalBytes, 1);
Segment* segment;
if (!allocated.getValue(segment))
return nullptr;
segment->offset = offset;
segment->sizeInBytes = sizeInBytes;
return segment;
}
void Segment::destroy(Segment *segment)
{
fastFree(segment);
}
Segment::Ptr Segment::adoptPtr(Segment* segment)
{
return Ptr(segment, &Segment::destroy);
}
String makeString(const Name& characters)
{
String result = String::fromUTF8(characters);
ASSERT(result);
return result;
}
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY)