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#pragma once
27
28#if ENABLE(WEBASSEMBLY)
29
30#include "B3Origin.h"
31#include "WasmFormat.h"
32
33#include <wtf/ForbidHeapAllocation.h>
34
35namespace JSC { namespace Wasm {
36
37class OpcodeOrigin {
38 WTF_FORBID_HEAP_ALLOCATION;
39public:
40 OpcodeOrigin() = default;
41 OpcodeOrigin(OpType opcode, size_t offset)
42 {
43 ASSERT(static_cast<uint32_t>(offset) == offset);
44 packedData = (static_cast<uint64_t>(opcode) << 32) | offset;
45 }
46
47 void dump(PrintStream&) const;
48
49 OpType opcode() const { return static_cast<OpType>(packedData >> 32); }
50 size_t location() const { return static_cast<uint32_t>(packedData); }
51
52private:
53 static_assert(sizeof(void*) == sizeof(uint64_t), "this packing doesn't work if this isn't the case");
54 uint64_t packedData { 0 };
55};
56
57} } // namespace JSC::Wasm
58
59#endif // ENABLE(WEBASSEMBLY)
60