1 2 /*---------------------------------------------------------------*/ 3 /*--- begin ir_match.h ---*/ 4 /*---------------------------------------------------------------*/ 5 6 /* 7 This file is part of Valgrind, a dynamic binary instrumentation 8 framework. 9 10 Copyright (C) 2004-2017 OpenWorks LLP 11 info@open-works.net 12 13 This program is free software; you can redistribute it and/or 14 modify it under the terms of the GNU General Public License as 15 published by the Free Software Foundation; either version 2 of the 16 License, or (at your option) any later version. 17 18 This program is distributed in the hope that it will be useful, but 19 WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21 General Public License for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 26 02110-1301, USA. 27 28 The GNU General Public License is contained in the file COPYING. 29 30 Neither the names of the U.S. Department of Energy nor the 31 University of California nor the names of its contributors may be 32 used to endorse or promote products derived from this software 33 without prior written permission. 34 */ 35 36 /* Provides a facility for doing IR tree matching. */ 37 38 #ifndef __VEX_IR_MATCH_H 39 #define __VEX_IR_MATCH_H 40 41 #include "libvex_basictypes.h" 42 #include "libvex_ir.h" 43 #include "main_util.h" // NULL 44 45 /* Patterns are simply IRExpr* trees, with IRExpr_Binder nodes at the 46 leaves, indicating binding points. Use these magic macros to 47 declare and define patterns. */ 48 49 #define DECLARE_PATTERN(_patt) \ 50 static IRExpr* _patt = NULL 51 52 #define DEFINE_PATTERN(_patt,_expr) \ 53 do { \ 54 if (!(_patt)) { \ 55 vassert(vexGetAllocMode() == VexAllocModeTEMP); \ 56 vexSetAllocMode(VexAllocModePERM); \ 57 _patt = (_expr); \ 58 vexSetAllocMode(VexAllocModeTEMP); \ 59 vassert(vexGetAllocMode() == VexAllocModeTEMP); \ 60 } \ 61 } while (0) 62 63 64 /* This type returns the result of a match -- it records what 65 the binders got instantiated to. */ 66 67 #define N_IRMATCH_BINDERS 4 68 69 typedef 70 struct { 71 const IRExpr* bindee[N_IRMATCH_BINDERS]; 72 } 73 MatchInfo; 74 75 76 /* The matching function. p is expected to have zero or more 77 IRExpr_Binds in it, numbered 0, 1, 2 ... Returns True if a match 78 succeeded. */ 79 80 extern 81 Bool matchIRExpr ( MatchInfo* mi, const IRExpr* p/*attern*/, 82 const IRExpr* e/*xpr*/ ); 83 84 85 #endif /* ndef __VEX_IR_MATCH_H */ 86 87 /*---------------------------------------------------------------*/ 88 /*--- end ir_match.h ---*/ 89 /*---------------------------------------------------------------*/ 90