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      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 YarrJIT_h
     27 #define YarrJIT_h
     28 
     29 #if ENABLE(YARR_JIT)
     30 
     31 #include "JSGlobalData.h"
     32 #include "MacroAssembler.h"
     33 #include "UString.h"
     34 #include "YarrPattern.h"
     35 
     36 #if CPU(X86) && !COMPILER(MSVC)
     37 #define YARR_CALL __attribute__ ((regparm (3)))
     38 #else
     39 #define YARR_CALL
     40 #endif
     41 
     42 namespace JSC {
     43 
     44 class JSGlobalData;
     45 class ExecutablePool;
     46 
     47 namespace Yarr {
     48 
     49 class YarrCodeBlock {
     50     typedef int (*YarrJITCode)(const UChar* input, unsigned start, unsigned length, int* output) YARR_CALL;
     51 
     52 public:
     53     YarrCodeBlock()
     54         : m_needFallBack(false)
     55     {
     56     }
     57 
     58     ~YarrCodeBlock()
     59     {
     60     }
     61 
     62     void setFallBack(bool fallback) { m_needFallBack = fallback; }
     63     bool isFallBack() { return m_needFallBack; }
     64     void set(MacroAssembler::CodeRef ref) { m_ref = ref; }
     65 
     66     int execute(const UChar* input, unsigned start, unsigned length, int* output)
     67     {
     68         return reinterpret_cast<YarrJITCode>(m_ref.m_code.executableAddress())(input, start, length, output);
     69     }
     70 
     71 #if ENABLE(REGEXP_TRACING)
     72     void *getAddr() { return m_ref.m_code.executableAddress(); }
     73 #endif
     74 
     75 private:
     76     MacroAssembler::CodeRef m_ref;
     77     bool m_needFallBack;
     78 };
     79 
     80 void jitCompile(YarrPattern&, JSGlobalData*, YarrCodeBlock& jitObject);
     81 int execute(YarrCodeBlock& jitObject, const UChar* input, unsigned start, unsigned length, int* output);
     82 
     83 } } // namespace JSC::Yarr
     84 
     85 #endif
     86 
     87 #endif // YarrJIT_h
     88