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
27#include "config.h"
28#include "WasmFunctionCodeBlock.h"
29
30#if ENABLE(WEBASSEMBLY)
31
32#include "BytecodeDumper.h"
33#include "BytecodeStructs.h"
34#include "InstructionStream.h"
35#include "LLIntThunks.h"
36
37namespace JSC { namespace Wasm {
38
39void FunctionCodeBlock::setInstructions(std::unique_ptr<InstructionStream> instructions)
40{
41 m_instructions = WTFMove(instructions);
42 m_instructionsRawPointer = m_instructions->rawPointer();
43}
44
45void FunctionCodeBlock::addOutOfLineJumpTarget(InstructionStream::Offset bytecodeOffset, int target)
46{
47 RELEASE_ASSERT(target);
48 m_outOfLineJumpTargets.set(bytecodeOffset, target);
49}
50
51InstructionStream::Offset FunctionCodeBlock::outOfLineJumpOffset(InstructionStream::Offset bytecodeOffset)
52{
53 ASSERT(m_outOfLineJumpTargets.contains(bytecodeOffset));
54 return m_outOfLineJumpTargets.get(bytecodeOffset);
55}
56
57const Instruction* FunctionCodeBlock::outOfLineJumpTarget(const Instruction* pc)
58{
59 int offset = bytecodeOffset(pc);
60 int target = outOfLineJumpOffset(offset);
61 return m_instructions->at(offset + target).ptr();
62}
63
64unsigned FunctionCodeBlock::addSignature(const Signature& signature)
65{
66 unsigned index = m_signatures.size();
67 m_signatures.append(&signature);
68 return index;
69}
70
71const Signature& FunctionCodeBlock::signature(unsigned index) const
72{
73 return *m_signatures[index];
74}
75
76auto FunctionCodeBlock::addJumpTable(size_t numberOfEntries) -> JumpTable&
77{
78#if !ASSERT_DISABLED
79 m_jumpTables.append(JumpTable(numberOfEntries, 0));
80#else
81 m_jumpTables.append(JumpTable(numberOfEntries));
82#endif
83 return m_jumpTables.last();
84}
85
86auto FunctionCodeBlock::jumpTable(unsigned tableIndex) const -> const JumpTable&
87{
88 return m_jumpTables[tableIndex];
89}
90
91unsigned FunctionCodeBlock::numberOfJumpTables() const
92{
93 return m_jumpTables.size();
94}
95
96} } // namespace JSC::Wasm
97
98#endif // ENABLE(WEBASSEMBLY)
99