1 2 /*--------------------------------------------------------------------*/ 3 /*--- Representation of source level types. priv_tytypes.h ---*/ 4 /*--------------------------------------------------------------------*/ 5 6 /* 7 This file is part of Valgrind, a dynamic binary instrumentation 8 framework. 9 10 Copyright (C) 2008-2017 OpenWorks LLP 11 info (at) open-works.co.uk 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., 59 Temple Place, Suite 330, Boston, MA 26 02111-1307, 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 #ifndef __PRIV_TYTYPES_H 37 #define __PRIV_TYTYPES_H 38 39 #include "pub_core_basics.h" // UWord 40 #include "pub_core_xarray.h" // XArray 41 #include "priv_misc.h" // MaybeULong 42 43 typedef 44 enum { 45 Te_EMPTY=10, /* empty (contains no info) */ 46 Te_INDIR, /* indirection to some other TyEnt */ 47 Te_UNKNOWN, /* denotes a unknown type/field/whatever */ 48 Te_Atom, /* name & 64-bit const, iow, enumeration member */ 49 Te_Field, /* struct/class field defn */ 50 Te_Bound, /* array bounds indication, for one dimension */ 51 Te_TyBase, /* base type */ 52 Te_TyPtr, /* pointer type */ 53 Te_TyRef, /* reference type */ 54 Te_TyPtrMbr, /* pointer to member type */ 55 Te_TyRvalRef,/* rvalue reference type */ 56 Te_TyTyDef, /* a renaming of some other type */ 57 Te_TyStOrUn, /* structure or union type */ 58 Te_TyEnum, /* an enum type */ 59 Te_TyArray, /* an array type */ 60 Te_TyFn, /* function type */ 61 Te_TyQual, /* qualified type */ 62 Te_TyVoid /* void type */ 63 } 64 TyEntTag; 65 66 /* Fields ending in "R" are references to other TyEnts. Fields ending 67 in "Rs" are XArray*s of references to other TyEnts. */ 68 typedef 69 struct { 70 UWord cuOff; 71 TyEntTag tag; 72 union { 73 struct { 74 } EMPTY; 75 struct { 76 UWord indR; 77 } INDIR; 78 struct { 79 } UNKNOWN; 80 struct { 81 HChar* name; /* in mallocville */ 82 Bool valueKnown; /* atoms w/ unknown value are possible */ 83 Long value; 84 } Atom; 85 struct { 86 HChar* name; /* in mallocville */ 87 UWord typeR; /* should be Te_TyXXXX */ 88 union { 89 UChar* loc; /* location expr, in mallocville */ 90 Word offset; /* or offset from the beginning of containing 91 entity */ 92 } pos; 93 Word nLoc; /* number of bytes in .pos.loc if >= 0, or -1 94 if .pos.offset should be used instead */ 95 Bool isStruct; 96 } Field; 97 struct { 98 Bool knownL; 99 Bool knownU; 100 Long boundL; 101 Long boundU; 102 } Bound; 103 struct { 104 HChar* name; /* in mallocville */ 105 Int szB; 106 UChar enc; /* S:signed U:unsigned F:floating C:complex float */ 107 } TyBase; 108 struct { 109 Int szB; 110 UWord typeR; 111 } TyPorR; 112 struct { 113 HChar* name; /* in mallocville */ 114 UWord typeR; /* MAY BE D3_INVALID_CUOFF, denoting unknown */ 115 } TyTyDef; 116 struct { 117 HChar* name; /* in mallocville */ 118 UWord szB; 119 UWord typeR; 120 XArray* /* of UWord */ fieldRs; 121 Bool complete; 122 Bool isStruct; 123 } TyStOrUn; 124 struct { 125 HChar* name; /* in mallocville */ 126 Int szB; 127 XArray* /* of UWord */ atomRs; 128 } TyEnum; 129 struct { 130 UWord typeR; 131 XArray* /* of UWord */ boundRs; 132 } TyArray; 133 struct { 134 } TyFn; 135 struct { 136 UChar qual; /* C:const V:volatile R:restrict */ 137 UWord typeR; 138 } TyQual; 139 struct { 140 Bool isFake; /* True == introduced by the reader */ 141 } TyVoid; 142 } Te; 143 } 144 TyEnt; 145 146 /* Does this TyEnt denote a type, as opposed to some other kind of 147 thing? */ 148 Bool ML_(TyEnt__is_type)( const TyEnt* ); 149 150 /* Print a TyEnt, debug-style. */ 151 void ML_(pp_TyEnt)( const TyEnt* ); 152 153 /* Print a whole XArray of TyEnts, debug-style */ 154 void ML_(pp_TyEnts)( const XArray* tyents, const HChar* who ); 155 156 /* Print a TyEnt, C style, chasing stuff as necessary. */ 157 void ML_(pp_TyEnt_C_ishly)( const XArray* /* of TyEnt */ tyents, 158 UWord cuOff ); 159 160 /* Generates a total ordering on TyEnts based only on their .cuOff 161 fields. */ 162 Word ML_(TyEnt__cmp_by_cuOff_only) ( const TyEnt* te1, const TyEnt* te2 ); 163 164 /* Generates a total ordering on TyEnts based on everything except 165 their .cuOff fields. */ 166 Word ML_(TyEnt__cmp_by_all_except_cuOff) ( const TyEnt* te1, const TyEnt* te2 ); 167 168 /* Free up all directly or indirectly heap-allocated stuff attached to 169 this TyEnt, and set its tag to Te_EMPTY. The .cuOff field is 170 unchanged. */ 171 void ML_(TyEnt__make_EMPTY) ( TyEnt* te ); 172 173 /* How big is this type? If .b in the returned struct is False, the 174 size is unknown. */ 175 176 MaybeULong ML_(sizeOfType)( const XArray* /* of TyEnt */ tyents, 177 UWord cuOff ); 178 179 /* Describe where in the type 'offset' falls. Caller must 180 deallocate the resulting XArray. */ 181 XArray* /*UChar*/ ML_(describe_type)( /*OUT*/PtrdiffT* residual_offset, 182 const XArray* /* of TyEnt */ tyents, 183 UWord ty_cuOff, 184 PtrdiffT offset ); 185 186 187 /* A fast-lookup cache for ML_(TyEnts__index_by_cuOff). Nothing 188 particularly surprising here; it's 2 way set associative, with some 189 number of ways, doesn't particularly have to be a power of 2. In 190 order to have a way to indicate an invalid entry, we set the second 191 value of the pair to NULL, and keep checking for it, since 192 unfortunately there's no obvious cuOff number that we could put in 193 the first word of the pair that could indicate an invalid entry. 194 195 4096 arrived at as the best value for an E6600 loading Qt-4.4.1 196 Designer and all associated libraries, compiled by gcc-4.3.1, 197 -g -O, 64-bit, which is at least a moderately good stress test, 198 with the largest library being about 150MB.*/ 199 200 #define N_TYENT_INDEX_CACHE 4096 201 202 typedef 203 struct { 204 struct { UWord cuOff0; TyEnt* ent0; 205 UWord cuOff1; TyEnt* ent1; } 206 ce[N_TYENT_INDEX_CACHE]; 207 } 208 TyEntIndexCache; 209 210 void ML_(TyEntIndexCache__invalidate) ( TyEntIndexCache* cache ); 211 212 /* 'ents' is an XArray of TyEnts, sorted by their .cuOff fields. Find 213 the entry which has .cuOff field as specified. Returns NULL if not 214 found. Asserts if more than one entry has the specified .cuOff 215 value. */ 216 TyEnt* ML_(TyEnts__index_by_cuOff) ( const XArray* /* of TyEnt */ ents, 217 TyEntIndexCache* cache, 218 UWord cuOff_to_find ); 219 220 #endif /* ndef __PRIV_TYTYPES_H */ 221 222 /*--------------------------------------------------------------------*/ 223 /*--- end priv_tytypes.h ---*/ 224 /*--------------------------------------------------------------------*/ 225
