1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/*
* Copyright (C) 2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "InterpreterInlines.h"
#include "Opcode.h"
#include "PreciseJumpTargets.h"
namespace JSC {
template<typename Block, typename Instruction, typename Function>
inline void extractStoredJumpTargetsForBytecodeOffset(Block* codeBlock, Interpreter* interpreter, Instruction* instructionsBegin, unsigned bytecodeOffset, Function function)
{
OpcodeID opcodeID = interpreter->getOpcodeID(instructionsBegin[bytecodeOffset]);
Instruction* current = instructionsBegin + bytecodeOffset;
switch (opcodeID) {
case op_jmp:
function(current[1].u.operand);
break;
case op_jtrue:
case op_jfalse:
case op_jeq_null:
case op_jneq_null:
function(current[2].u.operand);
break;
case op_jneq_ptr:
case op_jless:
case op_jlesseq:
case op_jgreater:
case op_jgreatereq:
case op_jnless:
case op_jnlesseq:
case op_jngreater:
case op_jngreatereq:
function(current[3].u.operand);
break;
case op_switch_imm:
case op_switch_char: {
auto& table = codeBlock->switchJumpTable(current[1].u.operand);
for (unsigned i = table.branchOffsets.size(); i--;)
function(table.branchOffsets[i]);
function(current[2].u.operand);
break;
}
case op_switch_string: {
auto& table = codeBlock->stringSwitchJumpTable(current[1].u.operand);
auto iter = table.offsetTable.begin();
auto end = table.offsetTable.end();
for (; iter != end; ++iter)
function(iter->value.branchOffset);
function(current[2].u.operand);
break;
}
default:
break;
}
}
} // namespace JSC
|
