1/*
2 * Copyright (C) 2017 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 "WasmInstance.h"
28
29#if ENABLE(WEBASSEMBLY)
30
31#include "Register.h"
32#include "WasmModuleInformation.h"
33#include <wtf/CheckedArithmetic.h>
34
35namespace JSC { namespace Wasm {
36
37namespace {
38size_t globalMemoryByteSize(Module& module)
39{
40 return (Checked<size_t>(module.moduleInformation().globals.size()) * sizeof(Register)).unsafeGet();
41}
42}
43
44Instance::Instance(Context* context, Ref<Module>&& module, EntryFrame** pointerToTopEntryFrame, void** pointerToActualStackLimit, StoreTopCallFrameCallback&& storeTopCallFrame)
45 : m_context(context)
46 , m_module(WTFMove(module))
47 , m_globals(MallocPtr<uint64_t>::malloc(globalMemoryByteSize(m_module.get())))
48 , m_pointerToTopEntryFrame(pointerToTopEntryFrame)
49 , m_pointerToActualStackLimit(pointerToActualStackLimit)
50 , m_storeTopCallFrame(WTFMove(storeTopCallFrame))
51 , m_numImportFunctions(m_module->moduleInformation().importFunctionCount())
52{
53 for (unsigned i = 0; i < m_numImportFunctions; ++i)
54 new (importFunctionInfo(i)) ImportFunctionInfo();
55}
56
57Ref<Instance> Instance::create(Context* context, Ref<Module>&& module, EntryFrame** pointerToTopEntryFrame, void** pointerToActualStackLimit, StoreTopCallFrameCallback&& storeTopCallFrame)
58{
59 return adoptRef(*new (NotNull, fastMalloc(allocationSize(module->moduleInformation().importFunctionCount()))) Instance(context, WTFMove(module), pointerToTopEntryFrame, pointerToActualStackLimit, WTFMove(storeTopCallFrame)));
60}
61
62Instance::~Instance() { }
63
64size_t Instance::extraMemoryAllocated() const
65{
66 return globalMemoryByteSize(m_module.get()) + allocationSize(m_numImportFunctions);
67}
68
69} } // namespace JSC::Wasm
70
71#endif // ENABLE(WEBASSEMBLY)
72