1/*
2 * Copyright (C) 2019 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "WasmContext.h"
28
29#if ENABLE(WEBASSEMBLY)
30
31namespace JSC { namespace Wasm {
32
33uint64_t* Context::scratchBufferForSize(size_t size)
34{
35 if (!size)
36 return nullptr;
37
38 auto locker = holdLock(m_scratchBufferLock);
39 if (size > m_sizeOfLastScratchBuffer) {
40 m_sizeOfLastScratchBuffer = size * 2;
41
42 auto newBuffer = makeUniqueArray<uint64_t>(m_sizeOfLastScratchBuffer);
43 RELEASE_ASSERT(newBuffer);
44 m_scratchBuffers.append(WTFMove(newBuffer));
45 }
46 // Scanning scratch buffers for GC is not necessary since while performing OSR entry, we do not perform GC.
47 return m_scratchBuffers.last().get();
48}
49
50} } // namespace JSC::Wasm
51
52#endif // ENABLE(WEBASSEMBLY)
53