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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
|
/*
* Copyright (C) 1999-2001, 2004 Harri Porten (porten@kde.org)
* Copyright (c) 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2009 Torch Mobile, Inc.
* Copyright (C) 2010 Peter Varga (pvarga@inf.u-szeged.hu), University of Szeged
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "config.h"
#include "RegExp.h"
#include "Lexer.h"
#include "yarr/Yarr.h"
#include "yarr/YarrJIT.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wtf/Assertions.h>
#include <wtf/OwnArrayPtr.h>
namespace JSC {
RegExpFlags regExpFlags(const UString& string)
{
RegExpFlags flags = NoFlags;
for (unsigned i = 0; i < string.length(); ++i) {
switch (string.characters()[i]) {
case 'g':
if (flags & FlagGlobal)
return InvalidFlags;
flags = static_cast<RegExpFlags>(flags | FlagGlobal);
break;
case 'i':
if (flags & FlagIgnoreCase)
return InvalidFlags;
flags = static_cast<RegExpFlags>(flags | FlagIgnoreCase);
break;
case 'm':
if (flags & FlagMultiline)
return InvalidFlags;
flags = static_cast<RegExpFlags>(flags | FlagMultiline);
break;
default:
return InvalidFlags;
}
}
return flags;
}
struct RegExpRepresentation {
#if ENABLE(YARR_JIT)
Yarr::YarrCodeBlock m_regExpJITCode;
#endif
OwnPtr<Yarr::BytecodePattern> m_regExpBytecode;
};
inline RegExp::RegExp(JSGlobalData* globalData, const UString& patternString, RegExpFlags flags)
: m_patternString(patternString)
, m_flags(flags)
, m_constructionError(0)
, m_numSubpatterns(0)
#if ENABLE(REGEXP_TRACING)
, m_rtMatchCallCount(0)
, m_rtMatchFoundCount(0)
#endif
, m_representation(adoptPtr(new RegExpRepresentation))
{
m_state = compile(globalData);
}
RegExp::~RegExp()
{
}
PassRefPtr<RegExp> RegExp::create(JSGlobalData* globalData, const UString& patternString, RegExpFlags flags)
{
RefPtr<RegExp> res = adoptRef(new RegExp(globalData, patternString, flags));
#if ENABLE(REGEXP_TRACING)
globalData->addRegExpToTrace(res);
#endif
return res.release();
}
RegExp::RegExpState RegExp::compile(JSGlobalData* globalData)
{
Yarr::YarrPattern pattern(m_patternString, ignoreCase(), multiline(), &m_constructionError);
if (m_constructionError)
return ParseError;
m_numSubpatterns = pattern.m_numSubpatterns;
RegExpState res = ByteCode;
#if ENABLE(YARR_JIT)
if (!pattern.m_containsBackreferences && globalData->canUseJIT()) {
Yarr::jitCompile(pattern, globalData, m_representation->m_regExpJITCode);
#if ENABLE(YARR_JIT_DEBUG)
if (!m_representation->m_regExpJITCode.isFallBack())
res = JITCode;
else
res = ByteCode;
#else
if (!m_representation->m_regExpJITCode.isFallBack())
return JITCode;
#endif
}
#endif
m_representation->m_regExpBytecode = Yarr::byteCompile(pattern, &globalData->m_regExpAllocator);
return res;
}
int RegExp::match(const UString& s, int startOffset, Vector<int, 32>* ovector)
{
if (startOffset < 0)
startOffset = 0;
#if ENABLE(REGEXP_TRACING)
m_rtMatchCallCount++;
#endif
if (static_cast<unsigned>(startOffset) > s.length() || s.isNull())
return -1;
if (m_state != ParseError) {
int offsetVectorSize = (m_numSubpatterns + 1) * 2;
int* offsetVector;
Vector<int, 32> nonReturnedOvector;
if (ovector) {
ovector->resize(offsetVectorSize);
offsetVector = ovector->data();
} else {
nonReturnedOvector.resize(offsetVectorSize);
offsetVector = nonReturnedOvector.data();
}
ASSERT(offsetVector);
// Initialize offsetVector with the return value (index 0) and the
// first subpattern start indicies (even index values) set to -1.
// No need to init the subpattern end indicies.
for (unsigned j = 0, i = 0; i < m_numSubpatterns + 1; j += 2, i++)
offsetVector[j] = -1;
int result;
#if ENABLE(YARR_JIT)
if (m_state == JITCode) {
result = Yarr::execute(m_representation->m_regExpJITCode, s.characters(), startOffset, s.length(), offsetVector);
#if ENABLE(YARR_JIT_DEBUG)
matchCompareWithInterpreter(s, startOffset, offsetVector, result);
#endif
} else
#endif
result = Yarr::interpret(m_representation->m_regExpBytecode.get(), s.characters(), startOffset, s.length(), offsetVector);
ASSERT(result >= -1);
#if ENABLE(REGEXP_TRACING)
if (result != -1)
m_rtMatchFoundCount++;
#endif
return result;
}
return -1;
}
#if ENABLE(YARR_JIT_DEBUG)
void RegExp::matchCompareWithInterpreter(const UString& s, int startOffset, int* offsetVector, int jitResult)
{
int offsetVectorSize = (m_numSubpatterns + 1) * 2;
Vector<int, 32> interpreterOvector;
interpreterOvector.resize(offsetVectorSize);
int* interpreterOffsetVector = interpreterOvector.data();
int interpreterResult = 0;
int differences = 0;
// Initialize interpreterOffsetVector with the return value (index 0) and the
// first subpattern start indicies (even index values) set to -1.
// No need to init the subpattern end indicies.
for (unsigned j = 0, i = 0; i < m_numSubpatterns + 1; j += 2, i++)
interpreterOffsetVector[j] = -1;
interpreterResult = Yarr::interpret(m_representation->m_regExpBytecode.get(), s.characters(), startOffset, s.length(), interpreterOffsetVector);
if (jitResult != interpreterResult)
differences++;
for (unsigned j = 2, i = 0; i < m_numSubpatterns; j +=2, i++)
if ((offsetVector[j] != interpreterOffsetVector[j])
|| ((offsetVector[j] >= 0) && (offsetVector[j+1] != interpreterOffsetVector[j+1])))
differences++;
if (differences) {
fprintf(stderr, "RegExp Discrepency for /%s/\n string input ", pattern().utf8().data());
unsigned segmentLen = s.length() - static_cast<unsigned>(startOffset);
fprintf(stderr, (segmentLen < 150) ? "\"%s\"\n" : "\"%148s...\"\n", s.utf8().data() + startOffset);
if (jitResult != interpreterResult) {
fprintf(stderr, " JIT result = %d, blah interpreted result = %d\n", jitResult, interpreterResult);
differences--;
} else {
fprintf(stderr, " Correct result = %d\n", jitResult);
}
if (differences) {
for (unsigned j = 2, i = 0; i < m_numSubpatterns; j +=2, i++) {
if (offsetVector[j] != interpreterOffsetVector[j])
fprintf(stderr, " JIT offset[%d] = %d, interpreted offset[%d] = %d\n", j, offsetVector[j], j, interpreterOffsetVector[j]);
if ((offsetVector[j] >= 0) && (offsetVector[j+1] != interpreterOffsetVector[j+1]))
fprintf(stderr, " JIT offset[%d] = %d, interpreted offset[%d] = %d\n", j+1, offsetVector[j+1], j+1, interpreterOffsetVector[j+1]);
}
}
}
}
#endif
#if ENABLE(REGEXP_TRACING)
void RegExp::printTraceData()
{
char formattedPattern[41];
char rawPattern[41];
strncpy(rawPattern, pattern().utf8().data(), 40);
rawPattern[40]= '\0';
int pattLen = strlen(rawPattern);
snprintf(formattedPattern, 41, (pattLen <= 38) ? "/%.38s/" : "/%.36s...", rawPattern);
#if ENABLE(YARR_JIT)
Yarr::YarrCodeBlock& codeBlock = m_representation->m_regExpJITCode;
const size_t jitAddrSize = 20;
char jitAddr[jitAddrSize];
if (m_state == JITCode)
snprintf(jitAddr, jitAddrSize, "fallback");
else
snprintf(jitAddr, jitAddrSize, "0x%014lx", reinterpret_cast<unsigned long int>(codeBlock.getAddr()));
#else
const char* jitAddr = "JIT Off";
#endif
printf("%-40.40s %16.16s %10d %10d\n", formattedPattern, jitAddr, m_rtMatchCallCount, m_rtMatchFoundCount);
}
#endif
} // namespace JSC
|
