1 | /* |
2 | * Copyright (C) 2009 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 | #ifndef RegexJIT_h |
27 | #define RegexJIT_h |
28 | |
29 | #include <wtf/Platform.h> |
30 | |
31 | #if ENABLE(YARR_JIT) |
32 | |
33 | #include "MacroAssembler.h" |
34 | #include "RegexPattern.h" |
35 | #include <UString.h> |
36 | |
37 | #include <pcre.h> |
38 | struct JSRegExp; // temporary, remove when fallback is removed. |
39 | |
40 | #if CPU(X86) && !COMPILER(MSVC) |
41 | #define YARR_CALL __attribute__ ((regparm (3))) |
42 | #else |
43 | #define YARR_CALL |
44 | #endif |
45 | |
46 | namespace JSC { |
47 | |
48 | class JSGlobalData; |
49 | class ExecutablePool; |
50 | |
51 | namespace Yarr { |
52 | |
53 | class RegexCodeBlock { |
54 | typedef int (*RegexJITCode)(const UChar* input, unsigned start, unsigned length, int* output) YARR_CALL; |
55 | |
56 | public: |
57 | RegexCodeBlock() |
58 | : m_fallback(0) |
59 | { |
60 | } |
61 | |
62 | ~RegexCodeBlock() |
63 | { |
64 | if (m_fallback) |
65 | jsRegExpFree(m_fallback); |
66 | } |
67 | |
68 | JSRegExp* getFallback() { return m_fallback; } |
69 | void setFallback(JSRegExp* fallback) { m_fallback = fallback; } |
70 | |
71 | bool operator!() { return !m_ref.m_code.executableAddress(); } |
72 | void set(MacroAssembler::CodeRef ref) { m_ref = ref; } |
73 | |
74 | int execute(const UChar* input, unsigned start, unsigned length, int* output) |
75 | { |
76 | return ((RegexJITCode)(m_ref.m_code.executableAddress()))(input, start, length, output); |
77 | } |
78 | |
79 | private: |
80 | MacroAssembler::CodeRef m_ref; |
81 | JSRegExp* m_fallback; |
82 | }; |
83 | |
84 | void jitCompileRegex(JSGlobalData* globalData, RegexCodeBlock& jitObject, const UString& pattern, unsigned& numSubpatterns, const char*& error, bool ignoreCase = false, bool multiline = false); |
85 | |
86 | inline int executeRegex(RegexCodeBlock& jitObject, const UChar* input, unsigned start, unsigned length, int* output, int outputArraySize) |
87 | { |
88 | if (JSRegExp* fallback = jitObject.getFallback()) |
89 | return (jsRegExpExecute(fallback, subject: input, subjectLength: length, startOffset: start, offsetsVector: output, offsetsVectorLength: outputArraySize) < 0) ? -1 : output[0]; |
90 | |
91 | return jitObject.execute(input, start, length, output); |
92 | } |
93 | |
94 | } } // namespace JSC::Yarr |
95 | |
96 | #endif |
97 | |
98 | #endif // RegexJIT_h |
99 | |