1/*
2 * Copyright (C) 2016-2018 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#pragma once
27
28#if ENABLE(WEBASSEMBLY)
29
30#include "JSArrayBuffer.h"
31#include "JSCJSValue.h"
32#include "JSSourceCode.h"
33#include "WebAssemblyFunction.h"
34#include "WebAssemblyWrapperFunction.h"
35
36namespace JSC {
37
38ALWAYS_INLINE uint32_t toNonWrappingUint32(ExecState* exec, JSValue value)
39{
40 VM& vm = exec->vm();
41 auto throwScope = DECLARE_THROW_SCOPE(vm);
42 double doubleValue = value.toInteger(exec);
43 RETURN_IF_EXCEPTION(throwScope, { });
44 if (doubleValue < 0 || doubleValue > UINT_MAX) {
45 throwException(exec, throwScope,
46 createRangeError(exec, "Expect an integer argument in the range: [0, 2^32 - 1]"_s));
47 return { };
48 }
49
50 return static_cast<uint32_t>(doubleValue);
51}
52
53ALWAYS_INLINE std::pair<const uint8_t*, size_t> getWasmBufferFromValue(ExecState* exec, JSValue value)
54{
55 VM& vm = exec->vm();
56 auto throwScope = DECLARE_THROW_SCOPE(vm);
57
58 if (auto* source = jsDynamicCast<JSSourceCode*>(vm, value)) {
59 auto* provider = static_cast<WebAssemblySourceProvider*>(source->sourceCode().provider());
60 return { provider->data().data(), provider->data().size() };
61 }
62
63 // If the given bytes argument is not a BufferSource, a TypeError exception is thrown.
64 JSArrayBuffer* arrayBuffer = value.getObject() ? jsDynamicCast<JSArrayBuffer*>(vm, value.getObject()) : nullptr;
65 JSArrayBufferView* arrayBufferView = value.getObject() ? jsDynamicCast<JSArrayBufferView*>(vm, value.getObject()) : nullptr;
66 if (!(arrayBuffer || arrayBufferView)) {
67 throwException(exec, throwScope, createTypeError(exec,
68 "first argument must be an ArrayBufferView or an ArrayBuffer"_s, defaultSourceAppender, runtimeTypeForValue(vm, value)));
69 return { nullptr, 0 };
70 }
71
72 if (arrayBufferView ? arrayBufferView->isNeutered() : arrayBuffer->impl()->isNeutered()) {
73 throwException(exec, throwScope, createTypeError(exec,
74 "underlying TypedArray has been detatched from the ArrayBuffer"_s, defaultSourceAppender, runtimeTypeForValue(vm, value)));
75 return { nullptr, 0 };
76 }
77
78 uint8_t* base = arrayBufferView ? static_cast<uint8_t*>(arrayBufferView->vector()) : static_cast<uint8_t*>(arrayBuffer->impl()->data());
79 size_t byteSize = arrayBufferView ? arrayBufferView->length() : arrayBuffer->impl()->byteLength();
80 return { base, byteSize };
81}
82
83ALWAYS_INLINE Vector<uint8_t> createSourceBufferFromValue(VM& vm, ExecState* exec, JSValue value)
84{
85 auto throwScope = DECLARE_THROW_SCOPE(vm);
86 const uint8_t* data;
87 size_t byteSize;
88 std::tie(data, byteSize) = getWasmBufferFromValue(exec, value);
89 RETURN_IF_EXCEPTION(throwScope, Vector<uint8_t>());
90
91 Vector<uint8_t> result;
92 if (!result.tryReserveCapacity(byteSize)) {
93 throwException(exec, throwScope, createOutOfMemoryError(exec));
94 return result;
95 }
96
97 result.grow(byteSize);
98 memcpy(result.data(), data, byteSize);
99 return result;
100}
101
102ALWAYS_INLINE bool isWebAssemblyHostFunction(VM& vm, JSObject* object, WebAssemblyFunction*& wasmFunction, WebAssemblyWrapperFunction*& wasmWrapperFunction)
103{
104 if (object->inherits<WebAssemblyFunction>(vm)) {
105 wasmFunction = jsCast<WebAssemblyFunction*>(object);
106 wasmWrapperFunction = nullptr;
107 return true;
108 }
109 if (object->inherits<WebAssemblyWrapperFunction>(vm)) {
110 wasmWrapperFunction = jsCast<WebAssemblyWrapperFunction*>(object);
111 wasmFunction = nullptr;
112 return true;
113 }
114 return false;
115}
116
117ALWAYS_INLINE bool isWebAssemblyHostFunction(VM& vm, JSValue value, WebAssemblyFunction*& wasmFunction, WebAssemblyWrapperFunction*& wasmWrapperFunction)
118{
119 if (!value.isObject())
120 return false;
121 return isWebAssemblyHostFunction(vm, jsCast<JSObject*>(value), wasmFunction, wasmWrapperFunction);
122}
123
124
125ALWAYS_INLINE bool isWebAssemblyHostFunction(VM& vm, JSObject* object)
126{
127 WebAssemblyFunction* unused;
128 WebAssemblyWrapperFunction* unused2;
129 return isWebAssemblyHostFunction(vm, object, unused, unused2);
130}
131
132} // namespace JSC
133
134#endif // ENABLE(WEBASSEMBLY)
135