sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1 | /* -*- mode: C; c-basic-offset: 3; -*- */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2 | |
| 3 | /*--------------------------------------------------------------------*/ |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 4 | /*--- Read DWARF3/4 ".debug_info" sections (DIE trees). ---*/ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5 | /*--- readdwarf3.c ---*/ |
| 6 | /*--------------------------------------------------------------------*/ |
| 7 | |
| 8 | /* |
| 9 | This file is part of Valgrind, a dynamic binary instrumentation |
| 10 | framework. |
| 11 | |
sewardj | 0f157dd | 2013-10-18 14:27:36 +0000 | [diff] [blame] | 12 | Copyright (C) 2008-2013 OpenWorks LLP |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 13 | info@open-works.co.uk |
| 14 | |
| 15 | This program is free software; you can redistribute it and/or |
| 16 | modify it under the terms of the GNU General Public License as |
| 17 | published by the Free Software Foundation; either version 2 of the |
| 18 | License, or (at your option) any later version. |
| 19 | |
| 20 | This program is distributed in the hope that it will be useful, but |
| 21 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 23 | General Public License for more details. |
| 24 | |
| 25 | You should have received a copy of the GNU General Public License |
| 26 | along with this program; if not, write to the Free Software |
| 27 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 28 | 02111-1307, USA. |
| 29 | |
| 30 | The GNU General Public License is contained in the file COPYING. |
| 31 | |
| 32 | Neither the names of the U.S. Department of Energy nor the |
| 33 | University of California nor the names of its contributors may be |
| 34 | used to endorse or promote products derived from this software |
| 35 | without prior written permission. |
| 36 | */ |
| 37 | |
njn | 8b68b64 | 2009-06-24 00:37:09 +0000 | [diff] [blame] | 38 | #if defined(VGO_linux) || defined(VGO_darwin) |
| 39 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 40 | /* REFERENCE (without which this code will not make much sense): |
| 41 | |
| 42 | DWARF Debugging Information Format, Version 3, |
| 43 | dated 20 December 2005 (the "D3 spec"). |
| 44 | |
| 45 | Available at http://www.dwarfstd.org/Dwarf3.pdf. There's also a |
| 46 | .doc (MS Word) version, but for some reason the section numbers |
| 47 | between the Word and PDF versions differ by 1 in the first digit. |
| 48 | All section references in this code are to the PDF version. |
| 49 | |
| 50 | CURRENT HACKS: |
| 51 | |
| 52 | DW_TAG_{const,volatile}_type no DW_AT_type is allowed; it is |
| 53 | assumed to mean "const void" or "volatile void" respectively. |
| 54 | GDB appears to interpret them like this, anyway. |
| 55 | |
| 56 | In many cases it is important to know the svma of a CU (the "base |
| 57 | address of the CU", as the D3 spec calls it). There are some |
| 58 | situations in which the spec implies this value is unknown, but the |
| 59 | Dwarf3 produced by gcc-4.1 seems to assume is not unknown but |
| 60 | merely zero when not explicitly stated. So we too have to make |
| 61 | that assumption. |
| 62 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 63 | POTENTIAL BUG? Spotted 6 Sept 08. Why doesn't |
| 64 | unitary_range_list() bias the resulting range list in the same way |
| 65 | that its more general cousin, get_range_list(), does? I don't |
| 66 | know. |
| 67 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 68 | TODO, 2008 Feb 17: |
| 69 | |
| 70 | get rid of cu_svma_known and document the assumed-zero svma hack. |
| 71 | |
| 72 | ML_(sizeOfType): differentiate between zero sized types and types |
| 73 | for which the size is unknown. Is this important? I don't know. |
| 74 | |
sewardj | a2af13d | 2012-04-04 17:42:02 +0000 | [diff] [blame] | 75 | DW_TAG_array_types: deal with explicit sizes (currently we compute |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 76 | the size from the bounds and the element size, although that's |
| 77 | fragile, if the bounds incompletely specified, or completely |
| 78 | absent) |
| 79 | |
| 80 | Document reason for difference (by 1) of stack preening depth in |
| 81 | parse_var_DIE vs parse_type_DIE. |
| 82 | |
| 83 | Don't hand to ML_(addVars), vars whose locations are entirely in |
| 84 | registers (DW_OP_reg*). This is merely a space-saving |
| 85 | optimisation, as ML_(evaluate_Dwarf3_Expr) should handle these |
| 86 | expressions correctly, by failing to evaluate them and hence |
| 87 | effectively ignoring the variable with which they are associated. |
| 88 | |
sewardj | a2af13d | 2012-04-04 17:42:02 +0000 | [diff] [blame] | 89 | Deal with DW_TAG_array_types which have element size != stride |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 90 | |
| 91 | In some cases, the info for a variable is split between two |
| 92 | different DIEs (generally a declarer and a definer). We punt on |
| 93 | these. Could do better here. |
| 94 | |
| 95 | The 'data_bias' argument passed to the expression evaluator |
| 96 | (ML_(evaluate_Dwarf3_Expr)) should really be changed to a |
| 97 | MaybeUWord, to make it clear when we do vs don't know what it is |
| 98 | for the evaluation of an expression. At the moment zero is passed |
| 99 | for this parameter in the don't know case. That's a bit fragile |
| 100 | and obscure; using a MaybeUWord would be clearer. |
| 101 | |
| 102 | POTENTIAL PERFORMANCE IMPROVEMENTS: |
| 103 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 104 | Currently, duplicate removal and all other queries for the type |
| 105 | entities array is done using cuOffset-based pointing, which |
| 106 | involves a binary search (VG_(lookupXA)) for each access. This is |
| 107 | wildly inefficient, although simple. It would be better to |
| 108 | translate all the cuOffset-based references (iow, all the "R" and |
| 109 | "Rs" fields in the TyEnts in 'tyents') to direct index numbers in |
| 110 | 'tyents' right at the start of dedup_types(), and use direct |
| 111 | indexing (VG_(indexXA)) wherever possible after that. |
| 112 | |
| 113 | cmp__XArrays_of_AddrRange is also a performance bottleneck. Move |
| 114 | VG_(indexXA) into pub_tool_xarray.h so it can be inlined at all use |
| 115 | points, and possibly also make an _UNCHECKED version which skips |
| 116 | the range checks in performance-critical situations such as this. |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 117 | |
| 118 | Handle interaction between read_DIE and parse_{var,type}_DIE |
| 119 | better. Currently read_DIE reads the entire DIE just to find where |
| 120 | the end is (and for debug printing), so that it can later reliably |
| 121 | move the cursor to the end regardless of what parse_{var,type}_DIE |
| 122 | do. This means many DIEs (most, even?) are read twice. It would |
| 123 | be smarter to make parse_{var,type}_DIE return a Bool indicating |
| 124 | whether or not they advanced the DIE cursor, and only if they |
| 125 | didn't should read_DIE itself read through the DIE. |
| 126 | |
| 127 | ML_(addVar) and add_var_to_arange: quite a lot of DiAddrRanges have |
| 128 | zero variables in their .vars XArray. Rather than have an XArray |
| 129 | with zero elements (which uses 2 malloc'd blocks), allow the .vars |
| 130 | pointer to be NULL in this case. |
| 131 | |
| 132 | More generally, reduce the amount of memory allocated and freed |
| 133 | while reading Dwarf3 type/variable information. Even modest (20MB) |
| 134 | objects cause this module to allocate and free hundreds of |
| 135 | thousands of small blocks, and ML_(arena_malloc) and its various |
| 136 | groupies always show up at the top of performance profiles. */ |
| 137 | |
| 138 | #include "pub_core_basics.h" |
tom | 588658b | 2009-01-22 13:40:12 +0000 | [diff] [blame] | 139 | #include "pub_core_debuginfo.h" |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 140 | #include "pub_core_libcbase.h" |
| 141 | #include "pub_core_libcassert.h" |
| 142 | #include "pub_core_libcprint.h" |
sewardj | 6c591e1 | 2011-04-11 16:17:51 +0000 | [diff] [blame] | 143 | #include "pub_core_libcsetjmp.h" // setjmp facilities |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 144 | #include "pub_core_hashtable.h" |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 145 | #include "pub_core_options.h" |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 146 | #include "pub_core_tooliface.h" /* VG_(needs) */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 147 | #include "pub_core_xarray.h" |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 148 | #include "pub_core_wordfm.h" |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 149 | #include "priv_misc.h" /* dinfo_zalloc/free */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 150 | #include "priv_image.h" |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 151 | #include "priv_tytypes.h" |
| 152 | #include "priv_d3basics.h" |
| 153 | #include "priv_storage.h" |
| 154 | #include "priv_readdwarf3.h" /* self */ |
| 155 | |
| 156 | |
| 157 | /*------------------------------------------------------------*/ |
| 158 | /*--- ---*/ |
| 159 | /*--- Basic machinery for parsing DIEs. ---*/ |
| 160 | /*--- ---*/ |
| 161 | /*------------------------------------------------------------*/ |
| 162 | |
| 163 | #define TRACE_D3(format, args...) \ |
| 164 | if (td3) { VG_(printf)(format, ## args); } |
| 165 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 166 | #define D3_INVALID_CUOFF ((UWord)(-1UL)) |
| 167 | #define D3_FAKEVOID_CUOFF ((UWord)(-2UL)) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 168 | |
| 169 | typedef |
| 170 | struct { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 171 | DiSlice sli; // to which this cursor applies |
| 172 | DiOffT sli_next; // offset in underlying DiImage; must be >= sli.ioff |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 173 | void (*barf)( const HChar* ) __attribute__((noreturn)); |
| 174 | const HChar* barfstr; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 175 | } |
| 176 | Cursor; |
| 177 | |
| 178 | static inline Bool is_sane_Cursor ( Cursor* c ) { |
| 179 | if (!c) return False; |
| 180 | if (!c->barf) return False; |
| 181 | if (!c->barfstr) return False; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 182 | if (!ML_(sli_is_valid)(c->sli)) return False; |
| 183 | if (c->sli.ioff == DiOffT_INVALID) return False; |
| 184 | if (c->sli_next < c->sli.ioff) return False; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 185 | return True; |
| 186 | } |
| 187 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 188 | // Initialise a cursor from a DiSlice (ELF section, really) so as to |
| 189 | // start reading at offset |sli_initial_offset| from the start of the |
| 190 | // slice. |
| 191 | static void init_Cursor ( /*OUT*/Cursor* c, |
| 192 | DiSlice sli, |
| 193 | ULong sli_initial_offset, |
| 194 | __attribute__((noreturn)) void (*barf)(const HChar*), |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 195 | const HChar* barfstr ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 196 | { |
| 197 | vg_assert(c); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 198 | VG_(bzero_inline)(c, sizeof(*c)); |
| 199 | c->sli = sli; |
| 200 | c->sli_next = c->sli.ioff + sli_initial_offset; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 201 | c->barf = barf; |
| 202 | c->barfstr = barfstr; |
| 203 | vg_assert(is_sane_Cursor(c)); |
| 204 | } |
| 205 | |
| 206 | static Bool is_at_end_Cursor ( Cursor* c ) { |
| 207 | vg_assert(is_sane_Cursor(c)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 208 | return c->sli_next >= c->sli.ioff + c->sli.szB; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 209 | } |
| 210 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 211 | static inline ULong get_position_of_Cursor ( Cursor* c ) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 212 | vg_assert(is_sane_Cursor(c)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 213 | return c->sli_next - c->sli.ioff; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 214 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 215 | static inline void set_position_of_Cursor ( Cursor* c, ULong pos ) { |
| 216 | c->sli_next = c->sli.ioff + pos; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 217 | vg_assert(is_sane_Cursor(c)); |
| 218 | } |
| 219 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 220 | static /*signed*/Long get_remaining_length_Cursor ( Cursor* c ) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 221 | vg_assert(is_sane_Cursor(c)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 222 | return c->sli.ioff + c->sli.szB - c->sli_next; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 223 | } |
| 224 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 225 | //static void* get_address_of_Cursor ( Cursor* c ) { |
| 226 | // vg_assert(is_sane_Cursor(c)); |
| 227 | // return &c->region_start_img[ c->region_next ]; |
| 228 | //} |
| 229 | |
| 230 | static DiCursor get_DiCursor_from_Cursor ( Cursor* c ) { |
| 231 | return mk_DiCursor(c->sli.img, c->sli_next); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 232 | } |
| 233 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 234 | /* FIXME: document assumptions on endianness for |
| 235 | get_UShort/UInt/ULong. */ |
| 236 | static inline UChar get_UChar ( Cursor* c ) { |
| 237 | UChar r; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 238 | vg_assert(is_sane_Cursor(c)); |
| 239 | if (c->sli_next + sizeof(UChar) > c->sli.ioff + c->sli.szB) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 240 | c->barf(c->barfstr); |
| 241 | /*NOTREACHED*/ |
| 242 | vg_assert(0); |
| 243 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 244 | r = ML_(img_get_UChar)(c->sli.img, c->sli_next); |
| 245 | c->sli_next += sizeof(UChar); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 246 | return r; |
| 247 | } |
| 248 | static UShort get_UShort ( Cursor* c ) { |
| 249 | UShort r; |
| 250 | vg_assert(is_sane_Cursor(c)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 251 | if (c->sli_next + sizeof(UShort) > c->sli.ioff + c->sli.szB) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 252 | c->barf(c->barfstr); |
| 253 | /*NOTREACHED*/ |
| 254 | vg_assert(0); |
| 255 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 256 | r = ML_(img_get_UShort)(c->sli.img, c->sli_next); |
| 257 | c->sli_next += sizeof(UShort); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 258 | return r; |
| 259 | } |
| 260 | static UInt get_UInt ( Cursor* c ) { |
| 261 | UInt r; |
| 262 | vg_assert(is_sane_Cursor(c)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 263 | if (c->sli_next + sizeof(UInt) > c->sli.ioff + c->sli.szB) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 264 | c->barf(c->barfstr); |
| 265 | /*NOTREACHED*/ |
| 266 | vg_assert(0); |
| 267 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 268 | r = ML_(img_get_UInt)(c->sli.img, c->sli_next); |
| 269 | c->sli_next += sizeof(UInt); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 270 | return r; |
| 271 | } |
| 272 | static ULong get_ULong ( Cursor* c ) { |
| 273 | ULong r; |
| 274 | vg_assert(is_sane_Cursor(c)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 275 | if (c->sli_next + sizeof(ULong) > c->sli.ioff + c->sli.szB) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 276 | c->barf(c->barfstr); |
| 277 | /*NOTREACHED*/ |
| 278 | vg_assert(0); |
| 279 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 280 | r = ML_(img_get_ULong)(c->sli.img, c->sli_next); |
| 281 | c->sli_next += sizeof(ULong); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 282 | return r; |
| 283 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 284 | static ULong get_ULEB128 ( Cursor* c ) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 285 | ULong result; |
| 286 | Int shift; |
| 287 | UChar byte; |
| 288 | /* unroll first iteration */ |
| 289 | byte = get_UChar( c ); |
| 290 | result = (ULong)(byte & 0x7f); |
| 291 | if (LIKELY(!(byte & 0x80))) return result; |
| 292 | shift = 7; |
| 293 | /* end unroll first iteration */ |
| 294 | do { |
| 295 | byte = get_UChar( c ); |
| 296 | result |= ((ULong)(byte & 0x7f)) << shift; |
| 297 | shift += 7; |
| 298 | } while (byte & 0x80); |
| 299 | return result; |
| 300 | } |
| 301 | static Long get_SLEB128 ( Cursor* c ) { |
| 302 | ULong result = 0; |
| 303 | Int shift = 0; |
| 304 | UChar byte; |
| 305 | do { |
| 306 | byte = get_UChar(c); |
| 307 | result |= ((ULong)(byte & 0x7f)) << shift; |
| 308 | shift += 7; |
| 309 | } while (byte & 0x80); |
| 310 | if (shift < 64 && (byte & 0x40)) |
| 311 | result |= -(1ULL << shift); |
| 312 | return result; |
| 313 | } |
| 314 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 315 | /* Assume 'c' points to the start of a string. Return a DiCursor of |
| 316 | whatever it points at, and advance it past the terminating zero. |
| 317 | This makes it safe for the caller to then copy the string with |
| 318 | ML_(addStr), since (w.r.t. image overruns) the process of advancing |
| 319 | past the terminating zero will already have "vetted" the string. */ |
| 320 | static DiCursor get_AsciiZ ( Cursor* c ) { |
| 321 | UChar uc; |
| 322 | DiCursor res = get_DiCursor_from_Cursor(c); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 323 | do { uc = get_UChar(c); } while (uc != 0); |
| 324 | return res; |
| 325 | } |
| 326 | |
| 327 | static ULong peek_ULEB128 ( Cursor* c ) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 328 | DiOffT here = c->sli_next; |
| 329 | ULong r = get_ULEB128( c ); |
| 330 | c->sli_next = here; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 331 | return r; |
| 332 | } |
| 333 | static UChar peek_UChar ( Cursor* c ) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 334 | DiOffT here = c->sli_next; |
| 335 | UChar r = get_UChar( c ); |
| 336 | c->sli_next = here; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 337 | return r; |
| 338 | } |
| 339 | |
| 340 | static ULong get_Dwarfish_UWord ( Cursor* c, Bool is_dw64 ) { |
| 341 | return is_dw64 ? get_ULong(c) : (ULong) get_UInt(c); |
| 342 | } |
| 343 | |
| 344 | static UWord get_UWord ( Cursor* c ) { |
| 345 | vg_assert(sizeof(UWord) == sizeof(void*)); |
| 346 | if (sizeof(UWord) == 4) return get_UInt(c); |
| 347 | if (sizeof(UWord) == 8) return get_ULong(c); |
| 348 | vg_assert(0); |
| 349 | } |
| 350 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 351 | /* Read a DWARF3 'Initial Length' field */ |
| 352 | static ULong get_Initial_Length ( /*OUT*/Bool* is64, |
| 353 | Cursor* c, |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 354 | const HChar* barfMsg ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 355 | { |
| 356 | ULong w64; |
| 357 | UInt w32; |
| 358 | *is64 = False; |
| 359 | w32 = get_UInt( c ); |
| 360 | if (w32 >= 0xFFFFFFF0 && w32 < 0xFFFFFFFF) { |
| 361 | c->barf( barfMsg ); |
| 362 | } |
| 363 | else if (w32 == 0xFFFFFFFF) { |
| 364 | *is64 = True; |
| 365 | w64 = get_ULong( c ); |
| 366 | } else { |
| 367 | *is64 = False; |
| 368 | w64 = (ULong)w32; |
| 369 | } |
| 370 | return w64; |
| 371 | } |
| 372 | |
| 373 | |
| 374 | /*------------------------------------------------------------*/ |
| 375 | /*--- ---*/ |
| 376 | /*--- "CUConst" structure ---*/ |
| 377 | /*--- ---*/ |
| 378 | /*------------------------------------------------------------*/ |
| 379 | |
| 380 | #define N_ABBV_CACHE 32 |
| 381 | |
| 382 | /* Holds information that is constant through the parsing of a |
| 383 | Compilation Unit. This is basically plumbed through to |
| 384 | everywhere. */ |
| 385 | typedef |
| 386 | struct { |
| 387 | /* Call here if anything goes wrong */ |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 388 | void (*barf)( const HChar* ) __attribute__((noreturn)); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 389 | /* Is this 64-bit DWARF ? */ |
| 390 | Bool is_dw64; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 391 | /* Which DWARF version ? (2, 3 or 4) */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 392 | UShort version; |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 393 | /* Length of this Compilation Unit, as stated in the |
| 394 | .unit_length :: InitialLength field of the CU Header. |
| 395 | However, this size (as specified by the D3 spec) does not |
| 396 | include the size of the .unit_length field itself, which is |
| 397 | either 4 or 12 bytes (32-bit or 64-bit Dwarf3). That value |
| 398 | can be obtained through the expression ".is_dw64 ? 12 : 4". */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 399 | ULong unit_length; |
| 400 | /* Offset of start of this unit in .debug_info */ |
| 401 | UWord cu_start_offset; |
| 402 | /* SVMA for this CU. In the D3 spec, is known as the "base |
| 403 | address of the compilation unit (last para sec 3.1.1). |
| 404 | Needed for (amongst things) interpretation of location-list |
| 405 | values. */ |
| 406 | Addr cu_svma; |
| 407 | Bool cu_svma_known; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 408 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 409 | /* The debug_abbreviations table to be used for this Unit */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 410 | //UChar* debug_abbv; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 411 | /* Upper bound on size thereof (an overestimate, in general) */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 412 | //UWord debug_abbv_maxszB; |
| 413 | /* A bounded area of the image, to be used as the |
| 414 | debug_abbreviations table tobe used for this Unit. */ |
| 415 | DiSlice debug_abbv; |
| 416 | |
| 417 | /* Image information for various sections. */ |
| 418 | DiSlice escn_debug_str; |
| 419 | DiSlice escn_debug_ranges; |
| 420 | DiSlice escn_debug_loc; |
| 421 | DiSlice escn_debug_line; |
| 422 | DiSlice escn_debug_info; |
| 423 | DiSlice escn_debug_types; |
| 424 | DiSlice escn_debug_info_alt; |
| 425 | DiSlice escn_debug_str_alt; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 426 | /* How much to add to .debug_types resp. alternate .debug_info offsets |
| 427 | in cook_die*. */ |
| 428 | UWord types_cuOff_bias; |
| 429 | UWord alt_cuOff_bias; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 430 | /* --- Needed so we can add stuff to the string table. --- */ |
| 431 | struct _DebugInfo* di; |
| 432 | /* --- a cache for set_abbv_Cursor --- */ |
| 433 | /* abbv_code == (ULong)-1 for an unused entry. */ |
| 434 | struct { ULong abbv_code; UWord posn; } saC_cache[N_ABBV_CACHE]; |
| 435 | UWord saC_cache_queries; |
| 436 | UWord saC_cache_misses; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 437 | |
| 438 | /* True if this came from .debug_types; otherwise it came from |
| 439 | .debug_info. */ |
| 440 | Bool is_type_unit; |
| 441 | /* For a unit coming from .debug_types, these hold the TU's type |
| 442 | signature and the uncooked DIE offset of the TU's signatured |
| 443 | type. For a unit coming from .debug_info, these are unused. */ |
| 444 | ULong type_signature; |
| 445 | ULong type_offset; |
| 446 | |
| 447 | /* Signatured type hash; computed once and then shared by all |
| 448 | CUs. */ |
| 449 | VgHashTable signature_types; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 450 | |
| 451 | /* True if this came from alternate .debug_info; otherwise |
| 452 | it came from normal .debug_info or .debug_types. */ |
| 453 | Bool is_alt_info; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 454 | } |
| 455 | CUConst; |
| 456 | |
| 457 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 458 | /* Return the cooked value of DIE depending on whether CC represents a |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 459 | .debug_types unit. To cook a DIE, we pretend that the .debug_info, |
| 460 | .debug_types and optional alternate .debug_info sections form |
| 461 | a contiguous whole, so that DIEs coming from .debug_types are numbered |
| 462 | starting at the end of .debug_info and DIEs coming from alternate |
| 463 | .debug_info are numbered starting at the end of .debug_types. */ |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 464 | static UWord cook_die( CUConst* cc, UWord die ) |
| 465 | { |
| 466 | if (cc->is_type_unit) |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 467 | die += cc->types_cuOff_bias; |
| 468 | else if (cc->is_alt_info) |
| 469 | die += cc->alt_cuOff_bias; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 470 | return die; |
| 471 | } |
| 472 | |
| 473 | /* Like cook_die, but understand that DIEs coming from a |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 474 | DW_FORM_ref_sig8 reference are already cooked. Also, handle |
| 475 | DW_FORM_GNU_ref_alt from within primary .debug_info or .debug_types |
| 476 | as reference to alternate .debug_info. */ |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 477 | static UWord cook_die_using_form( CUConst *cc, UWord die, DW_FORM form) |
| 478 | { |
| 479 | if (form == DW_FORM_ref_sig8) |
| 480 | return die; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 481 | if (form == DW_FORM_GNU_ref_alt) |
| 482 | return die + cc->alt_cuOff_bias; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 483 | return cook_die( cc, die ); |
| 484 | } |
| 485 | |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 486 | /* Return the uncooked offset of DIE and set *TYPE_FLAG to true if the DIE |
| 487 | came from the .debug_types section and *ALT_FLAG to true if the DIE |
| 488 | came from alternate .debug_info section. */ |
| 489 | static UWord uncook_die( CUConst *cc, UWord die, /*OUT*/Bool *type_flag, |
| 490 | Bool *alt_flag ) |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 491 | { |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 492 | *alt_flag = False; |
| 493 | *type_flag = False; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 494 | /* The use of escn_debug_{info,types}.szB seems safe to me even if |
| 495 | escn_debug_{info,types} are DiSlice_INVALID (meaning the |
| 496 | sections were not found), because DiSlice_INVALID.szB is always |
| 497 | zero. That said, it seems unlikely we'd ever get here if |
| 498 | .debug_info or .debug_types were missing. */ |
| 499 | if (die >= cc->escn_debug_info.szB) { |
| 500 | if (die >= cc->escn_debug_info.szB + cc->escn_debug_types.szB) { |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 501 | *alt_flag = True; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 502 | die -= cc->escn_debug_info.szB + cc->escn_debug_types.szB; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 503 | } else { |
| 504 | *type_flag = True; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 505 | die -= cc->escn_debug_info.szB; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 506 | } |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 507 | } |
| 508 | return die; |
| 509 | } |
| 510 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 511 | /*------------------------------------------------------------*/ |
| 512 | /*--- ---*/ |
| 513 | /*--- Helper functions for Guarded Expressions ---*/ |
| 514 | /*--- ---*/ |
| 515 | /*------------------------------------------------------------*/ |
| 516 | |
| 517 | /* Parse the location list starting at img-offset 'debug_loc_offset' |
| 518 | in .debug_loc. Results are biased with 'svma_of_referencing_CU' |
| 519 | and so I believe are correct SVMAs for the object as a whole. This |
| 520 | function allocates the UChar*, and the caller must deallocate it. |
| 521 | The resulting block is in so-called Guarded-Expression format. |
| 522 | |
| 523 | Guarded-Expression format is similar but not identical to the DWARF3 |
| 524 | location-list format. The format of each returned block is: |
| 525 | |
| 526 | UChar biasMe; |
| 527 | UChar isEnd; |
| 528 | followed by zero or more of |
| 529 | |
| 530 | (Addr aMin; Addr aMax; UShort nbytes; ..bytes..; UChar isEnd) |
| 531 | |
| 532 | '..bytes..' is an standard DWARF3 location expression which is |
| 533 | valid when aMin <= pc <= aMax (possibly after suitable biasing). |
| 534 | |
| 535 | The number of bytes in '..bytes..' is nbytes. |
| 536 | |
| 537 | The end of the sequence is marked by an isEnd == 1 value. All |
| 538 | previous isEnd values must be zero. |
| 539 | |
| 540 | biasMe is 1 if the aMin/aMax fields need this DebugInfo's |
| 541 | text_bias added before use, and 0 if the GX is this is not |
| 542 | necessary (is ready to go). |
| 543 | |
| 544 | Hence the block can be quickly parsed and is self-describing. Note |
| 545 | that aMax is 1 less than the corresponding value in a DWARF3 |
| 546 | location list. Zero length ranges, with aMax == aMin-1, are not |
| 547 | allowed. |
| 548 | */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 549 | /* 2008-sept-12: moved ML_(pp_GX) from here to d3basics.c, where |
| 550 | it more logically belongs. */ |
| 551 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 552 | |
tom | 402c9ee | 2009-03-09 09:19:03 +0000 | [diff] [blame] | 553 | /* Apply a text bias to a GX. */ |
| 554 | static void bias_GX ( /*MOD*/GExpr* gx, struct _DebugInfo* di ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 555 | { |
| 556 | UShort nbytes; |
| 557 | UChar* p = &gx->payload[0]; |
tom | 86781fa | 2011-10-05 08:48:07 +0000 | [diff] [blame] | 558 | UChar* pA; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 559 | UChar uc; |
| 560 | uc = *p++; /*biasMe*/ |
| 561 | if (uc == 0) |
| 562 | return; |
| 563 | vg_assert(uc == 1); |
| 564 | p[-1] = 0; /* mark it as done */ |
| 565 | while (True) { |
| 566 | uc = *p++; |
| 567 | if (uc == 1) |
| 568 | break; /*isEnd*/ |
| 569 | vg_assert(uc == 0); |
sewardj | 68a2ebd | 2008-03-07 22:17:31 +0000 | [diff] [blame] | 570 | /* t-bias aMin */ |
tom | 86781fa | 2011-10-05 08:48:07 +0000 | [diff] [blame] | 571 | pA = (UChar*)p; |
| 572 | ML_(write_Addr)(pA, ML_(read_Addr)(pA) + di->text_debug_bias); |
sewardj | 68a2ebd | 2008-03-07 22:17:31 +0000 | [diff] [blame] | 573 | p += sizeof(Addr); |
| 574 | /* t-bias aMax */ |
tom | 86781fa | 2011-10-05 08:48:07 +0000 | [diff] [blame] | 575 | pA = (UChar*)p; |
| 576 | ML_(write_Addr)(pA, ML_(read_Addr)(pA) + di->text_debug_bias); |
sewardj | 68a2ebd | 2008-03-07 22:17:31 +0000 | [diff] [blame] | 577 | p += sizeof(Addr); |
| 578 | /* nbytes, and actual expression */ |
tom | 86781fa | 2011-10-05 08:48:07 +0000 | [diff] [blame] | 579 | nbytes = ML_(read_UShort)(p); p += sizeof(UShort); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 580 | p += nbytes; |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | __attribute__((noinline)) |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 585 | static GExpr* make_singleton_GX ( DiCursor block, ULong nbytes ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 586 | { |
| 587 | SizeT bytesReqd; |
| 588 | GExpr* gx; |
| 589 | UChar *p, *pstart; |
| 590 | |
| 591 | vg_assert(sizeof(UWord) == sizeof(Addr)); |
| 592 | vg_assert(nbytes <= 0xFFFF); /* else we overflow the nbytes field */ |
| 593 | bytesReqd |
| 594 | = sizeof(UChar) /*biasMe*/ + sizeof(UChar) /*!isEnd*/ |
| 595 | + sizeof(UWord) /*aMin*/ + sizeof(UWord) /*aMax*/ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 596 | + sizeof(UShort) /*nbytes*/ + (SizeT)nbytes |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 597 | + sizeof(UChar); /*isEnd*/ |
| 598 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 599 | gx = ML_(dinfo_zalloc)( "di.readdwarf3.msGX.1", |
| 600 | sizeof(GExpr) + bytesReqd ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 601 | vg_assert(gx); |
| 602 | |
| 603 | p = pstart = &gx->payload[0]; |
| 604 | |
tom | 86781fa | 2011-10-05 08:48:07 +0000 | [diff] [blame] | 605 | p = ML_(write_UChar)(p, 0); /*biasMe*/ |
| 606 | p = ML_(write_UChar)(p, 0); /*!isEnd*/ |
| 607 | p = ML_(write_Addr)(p, 0); /*aMin*/ |
| 608 | p = ML_(write_Addr)(p, ~0); /*aMax*/ |
| 609 | p = ML_(write_UShort)(p, nbytes); /*nbytes*/ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 610 | ML_(cur_read_get)(p, block, nbytes); p += nbytes; |
tom | 86781fa | 2011-10-05 08:48:07 +0000 | [diff] [blame] | 611 | p = ML_(write_UChar)(p, 1); /*isEnd*/ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 612 | |
| 613 | vg_assert( (SizeT)(p - pstart) == bytesReqd); |
| 614 | vg_assert( &gx->payload[bytesReqd] |
| 615 | == ((UChar*)gx) + sizeof(GExpr) + bytesReqd ); |
| 616 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 617 | return gx; |
| 618 | } |
| 619 | |
| 620 | __attribute__((noinline)) |
| 621 | static GExpr* make_general_GX ( CUConst* cc, |
| 622 | Bool td3, |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 623 | ULong debug_loc_offset, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 624 | Addr svma_of_referencing_CU ) |
| 625 | { |
| 626 | Addr base; |
| 627 | Cursor loc; |
| 628 | XArray* xa; /* XArray of UChar */ |
| 629 | GExpr* gx; |
| 630 | Word nbytes; |
| 631 | |
| 632 | vg_assert(sizeof(UWord) == sizeof(Addr)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 633 | if (!ML_(sli_is_valid)(cc->escn_debug_loc) || cc->escn_debug_loc.szB == 0) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 634 | cc->barf("make_general_GX: .debug_loc is empty/missing"); |
| 635 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 636 | init_Cursor( &loc, cc->escn_debug_loc, 0, cc->barf, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 637 | "Overrun whilst reading .debug_loc section(2)" ); |
| 638 | set_position_of_Cursor( &loc, debug_loc_offset ); |
| 639 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 640 | TRACE_D3("make_general_GX (.debug_loc_offset = %llu, ioff = %llu) {\n", |
| 641 | debug_loc_offset, (ULong)get_DiCursor_from_Cursor(&loc).ioff ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 642 | |
| 643 | /* Who frees this xa? It is freed before this fn exits. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 644 | xa = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.mgGX.1", |
| 645 | ML_(dinfo_free), |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 646 | sizeof(UChar) ); |
| 647 | |
| 648 | { UChar c = 1; /*biasMe*/ VG_(addBytesToXA)( xa, &c, sizeof(c) ); } |
| 649 | |
| 650 | base = 0; |
| 651 | while (True) { |
| 652 | Bool acquire; |
| 653 | UWord len; |
| 654 | /* Read a (host-)word pair. This is something of a hack since |
| 655 | the word size to read is really dictated by the ELF file; |
| 656 | however, we assume we're reading a file with the same |
| 657 | word-sizeness as the host. Reasonably enough. */ |
| 658 | UWord w1 = get_UWord( &loc ); |
| 659 | UWord w2 = get_UWord( &loc ); |
| 660 | |
| 661 | TRACE_D3(" %08lx %08lx\n", w1, w2); |
| 662 | if (w1 == 0 && w2 == 0) |
| 663 | break; /* end of list */ |
| 664 | |
| 665 | if (w1 == -1UL) { |
| 666 | /* new value for 'base' */ |
| 667 | base = w2; |
| 668 | continue; |
| 669 | } |
| 670 | |
| 671 | /* else a location expression follows */ |
| 672 | /* else enumerate [w1+base, w2+base) */ |
| 673 | /* w2 is 1 past end of range, as per D3 defn for "DW_AT_high_pc" |
| 674 | (sec 2.17.2) */ |
| 675 | if (w1 > w2) { |
| 676 | TRACE_D3("negative range is for .debug_loc expr at " |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 677 | "file offset %llu\n", |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 678 | debug_loc_offset); |
| 679 | cc->barf( "negative range in .debug_loc section" ); |
| 680 | } |
| 681 | |
| 682 | /* ignore zero length ranges */ |
| 683 | acquire = w1 < w2; |
| 684 | len = (UWord)get_UShort( &loc ); |
| 685 | |
| 686 | if (acquire) { |
| 687 | UWord w; |
| 688 | UShort s; |
| 689 | UChar c; |
| 690 | c = 0; /* !isEnd*/ |
| 691 | VG_(addBytesToXA)( xa, &c, sizeof(c) ); |
| 692 | w = w1 + base + svma_of_referencing_CU; |
| 693 | VG_(addBytesToXA)( xa, &w, sizeof(w) ); |
| 694 | w = w2 -1 + base + svma_of_referencing_CU; |
| 695 | VG_(addBytesToXA)( xa, &w, sizeof(w) ); |
| 696 | s = (UShort)len; |
| 697 | VG_(addBytesToXA)( xa, &s, sizeof(s) ); |
| 698 | } |
| 699 | |
| 700 | while (len > 0) { |
| 701 | UChar byte = get_UChar( &loc ); |
| 702 | TRACE_D3("%02x", (UInt)byte); |
| 703 | if (acquire) |
| 704 | VG_(addBytesToXA)( xa, &byte, 1 ); |
| 705 | len--; |
| 706 | } |
| 707 | TRACE_D3("\n"); |
| 708 | } |
| 709 | |
| 710 | { UChar c = 1; /*isEnd*/ VG_(addBytesToXA)( xa, &c, sizeof(c) ); } |
| 711 | |
| 712 | nbytes = VG_(sizeXA)( xa ); |
| 713 | vg_assert(nbytes >= 1); |
| 714 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 715 | gx = ML_(dinfo_zalloc)( "di.readdwarf3.mgGX.2", sizeof(GExpr) + nbytes ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 716 | vg_assert(gx); |
| 717 | VG_(memcpy)( &gx->payload[0], (UChar*)VG_(indexXA)(xa,0), nbytes ); |
| 718 | vg_assert( &gx->payload[nbytes] |
| 719 | == ((UChar*)gx) + sizeof(GExpr) + nbytes ); |
| 720 | |
| 721 | VG_(deleteXA)( xa ); |
| 722 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 723 | TRACE_D3("}\n"); |
| 724 | |
| 725 | return gx; |
| 726 | } |
| 727 | |
| 728 | |
| 729 | /*------------------------------------------------------------*/ |
| 730 | /*--- ---*/ |
| 731 | /*--- Helper functions for range lists and CU headers ---*/ |
| 732 | /*--- ---*/ |
| 733 | /*------------------------------------------------------------*/ |
| 734 | |
| 735 | /* Denotes an address range. Both aMin and aMax are included in the |
| 736 | range; hence a complete range is (0, ~0) and an empty range is any |
| 737 | (X, X-1) for X > 0.*/ |
| 738 | typedef |
| 739 | struct { Addr aMin; Addr aMax; } |
| 740 | AddrRange; |
| 741 | |
| 742 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 743 | /* Generate an arbitrary structural total ordering on |
| 744 | XArray* of AddrRange. */ |
| 745 | static Word cmp__XArrays_of_AddrRange ( XArray* rngs1, XArray* rngs2 ) |
| 746 | { |
| 747 | Word n1, n2, i; |
| 748 | tl_assert(rngs1 && rngs2); |
| 749 | n1 = VG_(sizeXA)( rngs1 ); |
| 750 | n2 = VG_(sizeXA)( rngs2 ); |
| 751 | if (n1 < n2) return -1; |
| 752 | if (n1 > n2) return 1; |
| 753 | for (i = 0; i < n1; i++) { |
| 754 | AddrRange* rng1 = (AddrRange*)VG_(indexXA)( rngs1, i ); |
| 755 | AddrRange* rng2 = (AddrRange*)VG_(indexXA)( rngs2, i ); |
| 756 | if (rng1->aMin < rng2->aMin) return -1; |
| 757 | if (rng1->aMin > rng2->aMin) return 1; |
| 758 | if (rng1->aMax < rng2->aMax) return -1; |
| 759 | if (rng1->aMax > rng2->aMax) return 1; |
| 760 | } |
| 761 | return 0; |
| 762 | } |
| 763 | |
| 764 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 765 | __attribute__((noinline)) |
| 766 | static XArray* /* of AddrRange */ empty_range_list ( void ) |
| 767 | { |
| 768 | XArray* xa; /* XArray of AddrRange */ |
| 769 | /* Who frees this xa? varstack_preen() does. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 770 | xa = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.erl.1", |
| 771 | ML_(dinfo_free), |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 772 | sizeof(AddrRange) ); |
| 773 | return xa; |
| 774 | } |
| 775 | |
| 776 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 777 | __attribute__((noinline)) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 778 | static XArray* unitary_range_list ( Addr aMin, Addr aMax ) |
| 779 | { |
| 780 | XArray* xa; |
| 781 | AddrRange pair; |
| 782 | vg_assert(aMin <= aMax); |
| 783 | /* Who frees this xa? varstack_preen() does. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 784 | xa = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.url.1", |
| 785 | ML_(dinfo_free), |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 786 | sizeof(AddrRange) ); |
| 787 | pair.aMin = aMin; |
| 788 | pair.aMax = aMax; |
| 789 | VG_(addToXA)( xa, &pair ); |
| 790 | return xa; |
| 791 | } |
| 792 | |
| 793 | |
| 794 | /* Enumerate the address ranges starting at img-offset |
| 795 | 'debug_ranges_offset' in .debug_ranges. Results are biased with |
| 796 | 'svma_of_referencing_CU' and so I believe are correct SVMAs for the |
| 797 | object as a whole. This function allocates the XArray, and the |
| 798 | caller must deallocate it. */ |
| 799 | __attribute__((noinline)) |
| 800 | static XArray* /* of AddrRange */ |
| 801 | get_range_list ( CUConst* cc, |
| 802 | Bool td3, |
| 803 | UWord debug_ranges_offset, |
| 804 | Addr svma_of_referencing_CU ) |
| 805 | { |
| 806 | Addr base; |
| 807 | Cursor ranges; |
| 808 | XArray* xa; /* XArray of AddrRange */ |
| 809 | AddrRange pair; |
| 810 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 811 | if (!ML_(sli_is_valid)(cc->escn_debug_ranges) |
| 812 | || cc->escn_debug_ranges.szB == 0) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 813 | cc->barf("get_range_list: .debug_ranges is empty/missing"); |
| 814 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 815 | init_Cursor( &ranges, cc->escn_debug_ranges, 0, cc->barf, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 816 | "Overrun whilst reading .debug_ranges section(2)" ); |
| 817 | set_position_of_Cursor( &ranges, debug_ranges_offset ); |
| 818 | |
| 819 | /* Who frees this xa? varstack_preen() does. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 820 | xa = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.grl.1", ML_(dinfo_free), |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 821 | sizeof(AddrRange) ); |
| 822 | base = 0; |
| 823 | while (True) { |
| 824 | /* Read a (host-)word pair. This is something of a hack since |
| 825 | the word size to read is really dictated by the ELF file; |
| 826 | however, we assume we're reading a file with the same |
| 827 | word-sizeness as the host. Reasonably enough. */ |
| 828 | UWord w1 = get_UWord( &ranges ); |
| 829 | UWord w2 = get_UWord( &ranges ); |
| 830 | |
| 831 | if (w1 == 0 && w2 == 0) |
| 832 | break; /* end of list. */ |
| 833 | |
| 834 | if (w1 == -1UL) { |
| 835 | /* new value for 'base' */ |
| 836 | base = w2; |
| 837 | continue; |
| 838 | } |
| 839 | |
| 840 | /* else enumerate [w1+base, w2+base) */ |
| 841 | /* w2 is 1 past end of range, as per D3 defn for "DW_AT_high_pc" |
| 842 | (sec 2.17.2) */ |
| 843 | if (w1 > w2) |
| 844 | cc->barf( "negative range in .debug_ranges section" ); |
| 845 | if (w1 < w2) { |
| 846 | pair.aMin = w1 + base + svma_of_referencing_CU; |
| 847 | pair.aMax = w2 - 1 + base + svma_of_referencing_CU; |
| 848 | vg_assert(pair.aMin <= pair.aMax); |
| 849 | VG_(addToXA)( xa, &pair ); |
| 850 | } |
| 851 | } |
| 852 | return xa; |
| 853 | } |
| 854 | |
| 855 | |
| 856 | /* Parse the Compilation Unit header indicated at 'c' and |
| 857 | initialise 'cc' accordingly. */ |
| 858 | static __attribute__((noinline)) |
| 859 | void parse_CU_Header ( /*OUT*/CUConst* cc, |
| 860 | Bool td3, |
| 861 | Cursor* c, |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 862 | DiSlice escn_debug_abbv, |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 863 | Bool type_unit, |
| 864 | Bool alt_info ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 865 | { |
| 866 | UChar address_size; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 867 | ULong debug_abbrev_offset; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 868 | Int i; |
| 869 | |
| 870 | VG_(memset)(cc, 0, sizeof(*cc)); |
| 871 | vg_assert(c && c->barf); |
| 872 | cc->barf = c->barf; |
| 873 | |
| 874 | /* initial_length field */ |
| 875 | cc->unit_length |
| 876 | = get_Initial_Length( &cc->is_dw64, c, |
| 877 | "parse_CU_Header: invalid initial-length field" ); |
| 878 | |
| 879 | TRACE_D3(" Length: %lld\n", cc->unit_length ); |
| 880 | |
| 881 | /* version */ |
| 882 | cc->version = get_UShort( c ); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 883 | if (cc->version != 2 && cc->version != 3 && cc->version != 4) |
| 884 | cc->barf( "parse_CU_Header: is neither DWARF2 nor DWARF3 nor DWARF4" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 885 | TRACE_D3(" Version: %d\n", (Int)cc->version ); |
| 886 | |
| 887 | /* debug_abbrev_offset */ |
| 888 | debug_abbrev_offset = get_Dwarfish_UWord( c, cc->is_dw64 ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 889 | if (debug_abbrev_offset >= escn_debug_abbv.szB) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 890 | cc->barf( "parse_CU_Header: invalid debug_abbrev_offset" ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 891 | TRACE_D3(" Abbrev Offset: %lld\n", debug_abbrev_offset ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 892 | |
| 893 | /* address size. If this isn't equal to the host word size, just |
| 894 | give up. This makes it safe to assume elsewhere that |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 895 | DW_FORM_addr and DW_FORM_ref_addr can be treated as a host |
| 896 | word. */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 897 | address_size = get_UChar( c ); |
| 898 | if (address_size != sizeof(void*)) |
| 899 | cc->barf( "parse_CU_Header: invalid address_size" ); |
| 900 | TRACE_D3(" Pointer Size: %d\n", (Int)address_size ); |
| 901 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 902 | cc->is_type_unit = type_unit; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 903 | cc->is_alt_info = alt_info; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 904 | |
| 905 | if (type_unit) { |
| 906 | cc->type_signature = get_ULong( c ); |
| 907 | cc->type_offset = get_Dwarfish_UWord( c, cc->is_dw64 ); |
| 908 | } |
| 909 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 910 | /* Set up cc->debug_abbv to point to the relevant table for this |
| 911 | CU. Set its .szB so that at least we can't read off the end of |
| 912 | the debug_abbrev section -- potentially (and quite likely) too |
| 913 | big, if this isn't the last table in the section, but at least |
| 914 | it's safe. |
| 915 | |
| 916 | This amounts to taking debug_abbv_escn and moving the start |
| 917 | position along by debug_abbrev_offset bytes, hence forming a |
| 918 | smaller DiSlice which has the same end point. Since we checked |
| 919 | just above that debug_abbrev_offset is less than the size of |
| 920 | debug_abbv_escn, this should leave us with a nonempty slice. */ |
| 921 | vg_assert(debug_abbrev_offset < escn_debug_abbv.szB); |
| 922 | cc->debug_abbv = escn_debug_abbv; |
| 923 | cc->debug_abbv.ioff += debug_abbrev_offset; |
| 924 | cc->debug_abbv.szB -= debug_abbrev_offset; |
| 925 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 926 | /* and empty out the set_abbv_Cursor cache */ |
| 927 | if (0) VG_(printf)("XXXXXX initialise set_abbv_Cursor cache\n"); |
| 928 | for (i = 0; i < N_ABBV_CACHE; i++) { |
| 929 | cc->saC_cache[i].abbv_code = (ULong)-1; /* unused */ |
| 930 | cc->saC_cache[i].posn = 0; |
| 931 | } |
| 932 | cc->saC_cache_queries = 0; |
| 933 | cc->saC_cache_misses = 0; |
| 934 | } |
| 935 | |
| 936 | |
| 937 | /* Set up 'c' so it is ready to parse the abbv table entry code |
| 938 | 'abbv_code' for this compilation unit. */ |
| 939 | static __attribute__((noinline)) |
| 940 | void set_abbv_Cursor ( /*OUT*/Cursor* c, Bool td3, |
| 941 | CUConst* cc, ULong abbv_code ) |
| 942 | { |
| 943 | Int i; |
| 944 | ULong acode; |
| 945 | |
| 946 | if (abbv_code == 0) |
| 947 | cc->barf("set_abbv_Cursor: abbv_code == 0" ); |
| 948 | |
| 949 | /* (ULong)-1 is used to represent an empty cache slot. So we can't |
| 950 | allow it. In any case no valid DWARF3 should make a reference |
| 951 | to a negative abbreviation code. [at least, they always seem to |
| 952 | be numbered upwards from zero as far as I have seen] */ |
| 953 | vg_assert(abbv_code != (ULong)-1); |
| 954 | |
| 955 | /* First search the cache. */ |
| 956 | if (0) VG_(printf)("XXXXXX search set_abbv_Cursor cache\n"); |
| 957 | cc->saC_cache_queries++; |
| 958 | for (i = 0; i < N_ABBV_CACHE; i++) { |
| 959 | /* No need to test the cached abbv_codes for -1 (empty), since |
| 960 | we just asserted that abbv_code is not -1. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 961 | if (LIKELY(cc->saC_cache[i].abbv_code == abbv_code)) { |
| 962 | /* Found it. Set up the parser using the cached position, |
| 963 | and move this cache entry to the front. */ |
| 964 | if (0) VG_(printf)("XXXXXX found in set_abbv_Cursor cache\n"); |
| 965 | init_Cursor( c, cc->debug_abbv, cc->saC_cache[i].posn, |
| 966 | cc->barf, |
| 967 | "Overrun whilst parsing .debug_abbrev section(1)" ); |
| 968 | if (i > 0) { |
| 969 | ULong t_abbv_code = cc->saC_cache[i].abbv_code; |
| 970 | UWord t_posn = cc->saC_cache[i].posn; |
| 971 | while (i > 0) { |
| 972 | cc->saC_cache[i] = cc->saC_cache[i-1]; |
| 973 | i--; |
| 974 | } |
| 975 | cc->saC_cache[0].abbv_code = t_abbv_code; |
| 976 | cc->saC_cache[0].posn = t_posn; |
| 977 | } |
| 978 | return; |
| 979 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 980 | } |
| 981 | |
| 982 | /* No. It's not in the cache. We have to search through |
| 983 | .debug_abbrev, of course taking care to update the cache |
| 984 | when done. */ |
| 985 | |
| 986 | cc->saC_cache_misses++; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 987 | init_Cursor( c, cc->debug_abbv, 0, cc->barf, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 988 | "Overrun whilst parsing .debug_abbrev section(2)" ); |
| 989 | |
| 990 | /* Now iterate though the table until we find the requested |
| 991 | entry. */ |
| 992 | while (True) { |
njn | 4c245e5 | 2009-03-15 23:25:38 +0000 | [diff] [blame] | 993 | //ULong atag; |
| 994 | //UInt has_children; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 995 | acode = get_ULEB128( c ); |
| 996 | if (acode == 0) break; /* end of the table */ |
| 997 | if (acode == abbv_code) break; /* found it */ |
njn | 4c245e5 | 2009-03-15 23:25:38 +0000 | [diff] [blame] | 998 | /*atag = */ get_ULEB128( c ); |
| 999 | /*has_children = */ get_UChar( c ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1000 | //TRACE_D3(" %llu %s [%s]\n", |
| 1001 | // acode, pp_DW_TAG(atag), pp_DW_children(has_children)); |
| 1002 | while (True) { |
| 1003 | ULong at_name = get_ULEB128( c ); |
| 1004 | ULong at_form = get_ULEB128( c ); |
| 1005 | if (at_name == 0 && at_form == 0) break; |
| 1006 | //TRACE_D3(" %18s %s\n", |
| 1007 | // pp_DW_AT(at_name), pp_DW_FORM(at_form)); |
| 1008 | } |
| 1009 | } |
| 1010 | |
| 1011 | if (acode == 0) { |
| 1012 | /* Not found. This is fatal. */ |
| 1013 | cc->barf("set_abbv_Cursor: abbv_code not found"); |
| 1014 | } |
| 1015 | |
| 1016 | /* Otherwise, 'c' is now set correctly to parse the relevant entry, |
| 1017 | starting from the abbreviation entry's tag. So just cache |
| 1018 | the result, and return. */ |
| 1019 | for (i = N_ABBV_CACHE-1; i > N_ABBV_CACHE/2; i--) { |
| 1020 | cc->saC_cache[i] = cc->saC_cache[i-1]; |
| 1021 | } |
| 1022 | if (0) VG_(printf)("XXXXXX update set_abbv_Cursor cache\n"); |
| 1023 | cc->saC_cache[N_ABBV_CACHE/2].abbv_code = abbv_code; |
| 1024 | cc->saC_cache[N_ABBV_CACHE/2].posn = get_position_of_Cursor(c); |
| 1025 | } |
| 1026 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1027 | /* This represents a single signatured type. It maps a type signature |
| 1028 | (a ULong) to a cooked DIE offset. Objects of this type are stored |
| 1029 | in the type signature hash table. */ |
| 1030 | typedef |
| 1031 | struct D3SignatureType { |
| 1032 | struct D3SignatureType *next; |
| 1033 | UWord data; |
| 1034 | ULong type_signature; |
| 1035 | UWord die; |
| 1036 | } |
| 1037 | D3SignatureType; |
| 1038 | |
| 1039 | /* Record a signatured type in the hash table. */ |
| 1040 | static void record_signatured_type ( VgHashTable tab, |
| 1041 | ULong type_signature, |
| 1042 | UWord die ) |
| 1043 | { |
| 1044 | D3SignatureType *dstype = ML_(dinfo_zalloc) ( "di.readdwarf3.sigtype", |
| 1045 | sizeof(D3SignatureType) ); |
| 1046 | dstype->data = (UWord) type_signature; |
| 1047 | dstype->type_signature = type_signature; |
| 1048 | dstype->die = die; |
| 1049 | VG_(HT_add_node) ( tab, dstype ); |
| 1050 | } |
| 1051 | |
| 1052 | /* Given a type signature hash table and a type signature, return the |
| 1053 | cooked DIE offset of the type. If the type cannot be found, call |
| 1054 | BARF. */ |
| 1055 | static UWord lookup_signatured_type ( VgHashTable tab, |
| 1056 | ULong type_signature, |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 1057 | void (*barf)( const HChar* ) __attribute__((noreturn)) ) |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1058 | { |
| 1059 | D3SignatureType *dstype = VG_(HT_lookup) ( tab, (UWord) type_signature ); |
| 1060 | /* This may be unwarranted chumminess with the hash table |
| 1061 | implementation. */ |
| 1062 | while ( dstype != NULL && dstype->type_signature != type_signature) |
| 1063 | dstype = dstype->next; |
| 1064 | if (dstype == NULL) { |
| 1065 | barf("lookup_signatured_type: could not find signatured type"); |
| 1066 | /*NOTREACHED*/ |
| 1067 | vg_assert(0); |
| 1068 | } |
| 1069 | return dstype->die; |
| 1070 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1071 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1072 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1073 | /* Represents Form data. If szB is 1/2/4/8 then the result is in the |
| 1074 | lowest 1/2/4/8 bytes of u.val. If szB is zero or negative then the |
| 1075 | result is an image section beginning at u.cur and with size -szB. |
| 1076 | No other szB values are allowed. */ |
| 1077 | typedef |
| 1078 | struct { |
| 1079 | Long szB; // 1, 2, 4, 8 or non-positive values only. |
| 1080 | union { ULong val; DiCursor cur; } u; |
| 1081 | } |
| 1082 | FormContents; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1083 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1084 | /* From 'c', get the Form data into 'cts'. Either it gets a 1/2/4/8 |
| 1085 | byte scalar value, or (a reference to) zero or more bytes starting |
| 1086 | at a DiCursor.*/ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1087 | static |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1088 | void get_Form_contents ( /*OUT*/FormContents* cts, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1089 | CUConst* cc, Cursor* c, |
| 1090 | Bool td3, DW_FORM form ) |
| 1091 | { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1092 | VG_(bzero_inline)(cts, sizeof(*cts)); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1093 | switch (form) { |
| 1094 | case DW_FORM_data1: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1095 | cts->u.val = (ULong)(UChar)get_UChar(c); |
| 1096 | cts->szB = 1; |
| 1097 | TRACE_D3("%u", (UInt)cts->u.val); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1098 | break; |
| 1099 | case DW_FORM_data2: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1100 | cts->u.val = (ULong)(UShort)get_UShort(c); |
| 1101 | cts->szB = 2; |
| 1102 | TRACE_D3("%u", (UInt)cts->u.val); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1103 | break; |
| 1104 | case DW_FORM_data4: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1105 | cts->u.val = (ULong)(UInt)get_UInt(c); |
| 1106 | cts->szB = 4; |
| 1107 | TRACE_D3("%u", (UInt)cts->u.val); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1108 | break; |
sewardj | 0b5bf91 | 2008-03-07 20:07:58 +0000 | [diff] [blame] | 1109 | case DW_FORM_data8: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1110 | cts->u.val = get_ULong(c); |
| 1111 | cts->szB = 8; |
| 1112 | TRACE_D3("%llu", cts->u.val); |
sewardj | 0b5bf91 | 2008-03-07 20:07:58 +0000 | [diff] [blame] | 1113 | break; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1114 | case DW_FORM_sec_offset: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1115 | cts->u.val = (ULong)get_Dwarfish_UWord( c, cc->is_dw64 ); |
| 1116 | cts->szB = cc->is_dw64 ? 8 : 4; |
| 1117 | TRACE_D3("%llu", cts->u.val); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1118 | break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1119 | case DW_FORM_sdata: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1120 | cts->u.val = (ULong)(Long)get_SLEB128(c); |
| 1121 | cts->szB = 8; |
| 1122 | TRACE_D3("%lld", (Long)cts->u.val); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1123 | break; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1124 | case DW_FORM_udata: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1125 | cts->u.val = (ULong)(Long)get_ULEB128(c); |
| 1126 | cts->szB = 8; |
| 1127 | TRACE_D3("%llu", (Long)cts->u.val); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1128 | break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1129 | case DW_FORM_addr: |
| 1130 | /* note, this is a hack. DW_FORM_addr is defined as getting |
| 1131 | a word the size of the target machine as defined by the |
| 1132 | address_size field in the CU Header. However, |
| 1133 | parse_CU_Header() rejects all inputs except those for |
| 1134 | which address_size == sizeof(Word), hence we can just |
| 1135 | treat it as a (host) Word. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1136 | cts->u.val = (ULong)(UWord)get_UWord(c); |
| 1137 | cts->szB = sizeof(UWord); |
| 1138 | TRACE_D3("0x%lx", (UWord)cts->u.val); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1139 | break; |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 1140 | |
| 1141 | case DW_FORM_ref_addr: |
| 1142 | /* We make the same word-size assumption as DW_FORM_addr. */ |
| 1143 | /* What does this really mean? From D3 Sec 7.5.4, |
| 1144 | description of "reference", it would appear to reference |
| 1145 | some other DIE, by specifying the offset from the |
| 1146 | beginning of a .debug_info section. The D3 spec mentions |
| 1147 | that this might be in some other shared object and |
| 1148 | executable. But I don't see how the name of the other |
| 1149 | object/exe is specified. |
| 1150 | |
| 1151 | At least for the DW_FORM_ref_addrs created by icc11, the |
| 1152 | references seem to be within the same object/executable. |
| 1153 | So for the moment we merely range-check, to see that they |
| 1154 | actually do specify a plausible offset within this |
| 1155 | object's .debug_info, and return the value unchanged. |
sewardj | ee93cdb | 2012-04-29 11:35:37 +0000 | [diff] [blame] | 1156 | |
| 1157 | In DWARF 2, DW_FORM_ref_addr is address-sized, but in |
| 1158 | DWARF 3 and later, it is offset-sized. |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 1159 | */ |
sewardj | ee93cdb | 2012-04-29 11:35:37 +0000 | [diff] [blame] | 1160 | if (cc->version == 2) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1161 | cts->u.val = (ULong)(UWord)get_UWord(c); |
| 1162 | cts->szB = sizeof(UWord); |
sewardj | ee93cdb | 2012-04-29 11:35:37 +0000 | [diff] [blame] | 1163 | } else { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1164 | cts->u.val = get_Dwarfish_UWord(c, cc->is_dw64); |
| 1165 | cts->szB = cc->is_dw64 ? sizeof(ULong) : sizeof(UInt); |
sewardj | ee93cdb | 2012-04-29 11:35:37 +0000 | [diff] [blame] | 1166 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1167 | TRACE_D3("0x%lx", (UWord)cts->u.val); |
| 1168 | if (0) VG_(printf)("DW_FORM_ref_addr 0x%lx\n", (UWord)cts->u.val); |
| 1169 | if (/* the following is surely impossible, but ... */ |
| 1170 | !ML_(sli_is_valid)(cc->escn_debug_info) |
| 1171 | || cts->u.val >= (ULong)cc->escn_debug_info.szB) { |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 1172 | /* Hmm. Offset is nonsensical for this object's .debug_info |
| 1173 | section. Be safe and reject it. */ |
| 1174 | cc->barf("get_Form_contents: DW_FORM_ref_addr points " |
| 1175 | "outside .debug_info"); |
| 1176 | } |
| 1177 | break; |
| 1178 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1179 | case DW_FORM_strp: { |
| 1180 | /* this is an offset into .debug_str */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1181 | UWord uw = (UWord)get_Dwarfish_UWord( c, cc->is_dw64 ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1182 | if (!ML_(sli_is_valid)(cc->escn_debug_str) |
| 1183 | || uw >= cc->escn_debug_str.szB) |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 1184 | cc->barf("get_Form_contents: DW_FORM_strp " |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1185 | "points outside .debug_str"); |
| 1186 | /* FIXME: check the entire string lies inside debug_str, |
| 1187 | not just the first byte of it. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1188 | DiCursor str |
| 1189 | = ML_(cur_plus)( ML_(cur_from_sli)(cc->escn_debug_str), uw ); |
| 1190 | if (td3) { |
| 1191 | HChar* tmp = ML_(cur_read_strdup)(str, "di.getFC.1"); |
| 1192 | TRACE_D3("(indirect string, offset: 0x%lx): %s", uw, tmp); |
| 1193 | ML_(dinfo_free)(tmp); |
| 1194 | } |
| 1195 | cts->u.cur = str; |
| 1196 | cts->szB = - (Long)(1 + (ULong)ML_(cur_strlen)(str)); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1197 | break; |
| 1198 | } |
| 1199 | case DW_FORM_string: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1200 | DiCursor str = get_AsciiZ(c); |
| 1201 | if (td3) { |
| 1202 | HChar* tmp = ML_(cur_read_strdup)(str, "di.getFC.2"); |
| 1203 | TRACE_D3("%s", tmp); |
| 1204 | ML_(dinfo_free)(tmp); |
| 1205 | } |
| 1206 | cts->u.cur = str; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1207 | /* strlen is safe because get_AsciiZ already 'vetted' the |
| 1208 | entire string */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1209 | cts->szB = - (Long)(1 + (ULong)ML_(cur_strlen)(str)); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1210 | break; |
| 1211 | } |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1212 | case DW_FORM_ref1: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1213 | UChar u8 = get_UChar(c); |
| 1214 | UWord res = cc->cu_start_offset + (UWord)u8; |
| 1215 | cts->u.val = (ULong)res; |
| 1216 | cts->szB = sizeof(UWord); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1217 | TRACE_D3("<%lx>", res); |
| 1218 | break; |
| 1219 | } |
| 1220 | case DW_FORM_ref2: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1221 | UShort u16 = get_UShort(c); |
| 1222 | UWord res = cc->cu_start_offset + (UWord)u16; |
| 1223 | cts->u.val = (ULong)res; |
| 1224 | cts->szB = sizeof(UWord); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1225 | TRACE_D3("<%lx>", res); |
| 1226 | break; |
| 1227 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1228 | case DW_FORM_ref4: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1229 | UInt u32 = get_UInt(c); |
| 1230 | UWord res = cc->cu_start_offset + (UWord)u32; |
| 1231 | cts->u.val = (ULong)res; |
| 1232 | cts->szB = sizeof(UWord); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1233 | TRACE_D3("<%lx>", res); |
| 1234 | break; |
| 1235 | } |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1236 | case DW_FORM_ref8: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1237 | ULong u64 = get_ULong(c); |
| 1238 | UWord res = cc->cu_start_offset + (UWord)u64; |
| 1239 | cts->u.val = (ULong)res; |
| 1240 | cts->szB = sizeof(UWord); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1241 | TRACE_D3("<%lx>", res); |
| 1242 | break; |
| 1243 | } |
| 1244 | case DW_FORM_ref_udata: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1245 | ULong u64 = get_ULEB128(c); |
| 1246 | UWord res = cc->cu_start_offset + (UWord)u64; |
| 1247 | cts->u.val = (ULong)res; |
| 1248 | cts->szB = sizeof(UWord); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1249 | TRACE_D3("<%lx>", res); |
| 1250 | break; |
| 1251 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1252 | case DW_FORM_flag: { |
| 1253 | UChar u8 = get_UChar(c); |
| 1254 | TRACE_D3("%u", (UInt)u8); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1255 | cts->u.val = (ULong)u8; |
| 1256 | cts->szB = 1; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1257 | break; |
| 1258 | } |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1259 | case DW_FORM_flag_present: |
| 1260 | TRACE_D3("1"); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1261 | cts->u.val = 1; |
| 1262 | cts->szB = 1; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1263 | break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1264 | case DW_FORM_block1: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1265 | ULong u64b; |
| 1266 | ULong u64 = (ULong)get_UChar(c); |
| 1267 | DiCursor block = get_DiCursor_from_Cursor(c); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1268 | TRACE_D3("%llu byte block: ", u64); |
| 1269 | for (u64b = u64; u64b > 0; u64b--) { |
| 1270 | UChar u8 = get_UChar(c); |
| 1271 | TRACE_D3("%x ", (UInt)u8); |
| 1272 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1273 | cts->u.cur = block; |
| 1274 | cts->szB = - (Long)u64; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1275 | break; |
| 1276 | } |
sewardj | b2250d3 | 2008-10-23 11:13:05 +0000 | [diff] [blame] | 1277 | case DW_FORM_block2: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1278 | ULong u64b; |
| 1279 | ULong u64 = (ULong)get_UShort(c); |
| 1280 | DiCursor block = get_DiCursor_from_Cursor(c); |
sewardj | b2250d3 | 2008-10-23 11:13:05 +0000 | [diff] [blame] | 1281 | TRACE_D3("%llu byte block: ", u64); |
| 1282 | for (u64b = u64; u64b > 0; u64b--) { |
| 1283 | UChar u8 = get_UChar(c); |
| 1284 | TRACE_D3("%x ", (UInt)u8); |
| 1285 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1286 | cts->u.cur = block; |
| 1287 | cts->szB = - (Long)u64; |
sewardj | b2250d3 | 2008-10-23 11:13:05 +0000 | [diff] [blame] | 1288 | break; |
| 1289 | } |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1290 | case DW_FORM_block4: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1291 | ULong u64b; |
| 1292 | ULong u64 = (ULong)get_UInt(c); |
| 1293 | DiCursor block = get_DiCursor_from_Cursor(c); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1294 | TRACE_D3("%llu byte block: ", u64); |
| 1295 | for (u64b = u64; u64b > 0; u64b--) { |
| 1296 | UChar u8 = get_UChar(c); |
| 1297 | TRACE_D3("%x ", (UInt)u8); |
| 1298 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1299 | cts->u.cur = block; |
| 1300 | cts->szB = - (Long)u64; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1301 | break; |
| 1302 | } |
| 1303 | case DW_FORM_exprloc: |
| 1304 | case DW_FORM_block: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1305 | ULong u64b; |
| 1306 | ULong u64 = (ULong)get_ULEB128(c); |
| 1307 | DiCursor block = get_DiCursor_from_Cursor(c); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1308 | TRACE_D3("%llu byte block: ", u64); |
| 1309 | for (u64b = u64; u64b > 0; u64b--) { |
| 1310 | UChar u8 = get_UChar(c); |
| 1311 | TRACE_D3("%x ", (UInt)u8); |
| 1312 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1313 | cts->u.cur = block; |
| 1314 | cts->szB = - (Long)u64; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1315 | break; |
| 1316 | } |
| 1317 | case DW_FORM_ref_sig8: { |
| 1318 | ULong u64b; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1319 | ULong signature = get_ULong (c); |
| 1320 | ULong work = signature; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1321 | TRACE_D3("8 byte signature: "); |
| 1322 | for (u64b = 8; u64b > 0; u64b--) { |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1323 | UChar u8 = work & 0xff; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1324 | TRACE_D3("%x ", (UInt)u8); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1325 | work >>= 8; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1326 | } |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1327 | /* Due to the way that the hash table is constructed, the |
| 1328 | resulting DIE offset here is already "cooked". See |
| 1329 | cook_die_using_form. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1330 | cts->u.val = lookup_signatured_type (cc->signature_types, signature, |
| 1331 | c->barf); |
| 1332 | cts->szB = sizeof(UWord); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1333 | break; |
| 1334 | } |
| 1335 | case DW_FORM_indirect: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1336 | get_Form_contents (cts, cc, c, td3, (DW_FORM)get_ULEB128(c)); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1337 | return; |
| 1338 | |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 1339 | case DW_FORM_GNU_ref_alt: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1340 | cts->u.val = get_Dwarfish_UWord(c, cc->is_dw64); |
| 1341 | cts->szB = cc->is_dw64 ? sizeof(ULong) : sizeof(UInt); |
| 1342 | TRACE_D3("0x%lx", (UWord)cts->u.val); |
| 1343 | if (0) VG_(printf)("DW_FORM_GNU_ref_alt 0x%lx\n", (UWord)cts->u.val); |
| 1344 | if (/* the following is surely impossible, but ... */ |
| 1345 | !ML_(sli_is_valid)(cc->escn_debug_info_alt) |
| 1346 | || cts->u.val >= (ULong)cc->escn_debug_info_alt.szB) { |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 1347 | /* Hmm. Offset is nonsensical for this object's .debug_info |
| 1348 | section. Be safe and reject it. */ |
| 1349 | cc->barf("get_Form_contents: DW_FORM_ref_addr points " |
| 1350 | "outside alternate .debug_info"); |
| 1351 | } |
| 1352 | break; |
| 1353 | |
| 1354 | case DW_FORM_GNU_strp_alt: { |
| 1355 | /* this is an offset into alternate .debug_str */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1356 | SizeT uw = (UWord)get_Dwarfish_UWord( c, cc->is_dw64 ); |
| 1357 | if (!ML_(sli_is_valid)(cc->escn_debug_str_alt) |
| 1358 | || uw >= cc->escn_debug_str_alt.szB) |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 1359 | cc->barf("get_Form_contents: DW_FORM_GNU_strp_alt " |
| 1360 | "points outside alternate .debug_str"); |
| 1361 | /* FIXME: check the entire string lies inside debug_str, |
| 1362 | not just the first byte of it. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1363 | DiCursor str |
| 1364 | = ML_(cur_plus)( ML_(cur_from_sli)(cc->escn_debug_str_alt), uw); |
| 1365 | if (td3) { |
| 1366 | HChar* tmp = ML_(cur_read_strdup)(str, "di.getFC.3"); |
| 1367 | TRACE_D3("(indirect alt string, offset: 0x%lx): %s", uw, tmp); |
| 1368 | ML_(dinfo_free)(tmp); |
| 1369 | } |
| 1370 | cts->u.cur = str; |
| 1371 | cts->szB = - (Long)(1 + (ULong)ML_(cur_strlen)(str)); |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 1372 | break; |
| 1373 | } |
| 1374 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1375 | default: |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 1376 | VG_(printf)( |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1377 | "get_Form_contents: unhandled %d (%s) at <%llx>\n", |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 1378 | form, ML_(pp_DW_FORM)(form), get_position_of_Cursor(c)); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1379 | c->barf("get_Form_contents: unhandled DW_FORM"); |
| 1380 | } |
| 1381 | } |
| 1382 | |
| 1383 | |
| 1384 | /*------------------------------------------------------------*/ |
| 1385 | /*--- ---*/ |
| 1386 | /*--- Parsing of variable-related DIEs ---*/ |
| 1387 | /*--- ---*/ |
| 1388 | /*------------------------------------------------------------*/ |
| 1389 | |
| 1390 | typedef |
| 1391 | struct _TempVar { |
florian | 1636d33 | 2012-11-15 04:27:04 +0000 | [diff] [blame] | 1392 | HChar* name; /* in DebugInfo's .strchunks */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1393 | /* Represent ranges economically. nRanges is the number of |
| 1394 | ranges. Cases: |
| 1395 | 0: .rngOneMin .rngOneMax .manyRanges are all zero |
| 1396 | 1: .rngOneMin .rngOneMax hold the range; .rngMany is NULL |
| 1397 | 2: .rngOneMin .rngOneMax are zero; .rngMany holds the ranges. |
| 1398 | This is merely an optimisation to avoid having to allocate |
| 1399 | and free the XArray in the common (98%) of cases where there |
| 1400 | is zero or one address ranges. */ |
| 1401 | UWord nRanges; |
| 1402 | Addr rngOneMin; |
| 1403 | Addr rngOneMax; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 1404 | XArray* rngMany; /* of AddrRange. NON-UNIQUE PTR in AR_DINFO. */ |
| 1405 | /* Do not free .rngMany, since many TempVars will have the same |
| 1406 | value. Instead the associated storage is to be freed by |
| 1407 | deleting 'rangetree', which stores a single copy of each |
| 1408 | range. */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1409 | /* --- */ |
| 1410 | Int level; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 1411 | UWord typeR; /* a cuOff */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1412 | GExpr* gexpr; /* for this variable */ |
| 1413 | GExpr* fbGX; /* to find the frame base of the enclosing fn, if |
| 1414 | any */ |
florian | 1636d33 | 2012-11-15 04:27:04 +0000 | [diff] [blame] | 1415 | HChar* fName; /* declaring file name, or NULL */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1416 | Int fLine; /* declaring file line number, or zero */ |
| 1417 | /* offset in .debug_info, so that abstract instances can be |
| 1418 | found to satisfy references from concrete instances. */ |
| 1419 | UWord dioff; |
| 1420 | UWord absOri; /* so the absOri fields refer to dioff fields |
| 1421 | in some other, related TempVar. */ |
| 1422 | } |
| 1423 | TempVar; |
| 1424 | |
sewardj | 7cf4e6b | 2008-05-01 20:24:26 +0000 | [diff] [blame] | 1425 | #define N_D3_VAR_STACK 48 |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1426 | |
| 1427 | typedef |
| 1428 | struct { |
| 1429 | /* Contains the range stack: a stack of address ranges, one |
| 1430 | stack entry for each nested scope. |
| 1431 | |
| 1432 | Some scope entries are created by function definitions |
| 1433 | (DW_AT_subprogram), and for those, we also note the GExpr |
| 1434 | derived from its DW_AT_frame_base attribute, if any. |
| 1435 | Consequently it should be possible to find, for any |
| 1436 | variable's DIE, the GExpr for the the containing function's |
| 1437 | DW_AT_frame_base by scanning back through the stack to find |
| 1438 | the nearest entry associated with a function. This somewhat |
| 1439 | elaborate scheme is provided so as to make it possible to |
| 1440 | obtain the correct DW_AT_frame_base expression even in the |
| 1441 | presence of nested functions (or to be more precise, in the |
| 1442 | presence of nested DW_AT_subprogram DIEs). |
| 1443 | */ |
| 1444 | Int sp; /* [sp] is innermost active entry; sp==-1 for empty |
| 1445 | stack */ |
| 1446 | XArray* ranges[N_D3_VAR_STACK]; /* XArray of AddrRange */ |
| 1447 | Int level[N_D3_VAR_STACK]; /* D3 DIE levels */ |
| 1448 | Bool isFunc[N_D3_VAR_STACK]; /* from DW_AT_subprogram? */ |
| 1449 | GExpr* fbGX[N_D3_VAR_STACK]; /* if isFunc, contains the FB |
| 1450 | expr, else NULL */ |
| 1451 | /* The file name table. Is a mapping from integer index to the |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1452 | (permanent) copy of the string in in DebugInfo's .strchunks. */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1453 | XArray* /* of UChar* */ filenameTable; |
| 1454 | } |
| 1455 | D3VarParser; |
| 1456 | |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 1457 | static void varstack_show ( D3VarParser* parser, const HChar* str ) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1458 | Word i, j; |
| 1459 | VG_(printf)(" varstack (%s) {\n", str); |
| 1460 | for (i = 0; i <= parser->sp; i++) { |
| 1461 | XArray* xa = parser->ranges[i]; |
| 1462 | vg_assert(xa); |
| 1463 | VG_(printf)(" [%ld] (level %d)", i, parser->level[i]); |
| 1464 | if (parser->isFunc[i]) { |
| 1465 | VG_(printf)(" (fbGX=%p)", parser->fbGX[i]); |
| 1466 | } else { |
| 1467 | vg_assert(parser->fbGX[i] == NULL); |
| 1468 | } |
| 1469 | VG_(printf)(": "); |
| 1470 | if (VG_(sizeXA)( xa ) == 0) { |
| 1471 | VG_(printf)("** empty PC range array **"); |
| 1472 | } else { |
| 1473 | for (j = 0; j < VG_(sizeXA)( xa ); j++) { |
| 1474 | AddrRange* range = (AddrRange*) VG_(indexXA)( xa, j ); |
| 1475 | vg_assert(range); |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 1476 | VG_(printf)("[%#lx,%#lx] ", range->aMin, range->aMax); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1477 | } |
| 1478 | } |
| 1479 | VG_(printf)("\n"); |
| 1480 | } |
| 1481 | VG_(printf)(" }\n"); |
| 1482 | } |
| 1483 | |
| 1484 | /* Remove from the stack, all entries with .level > 'level' */ |
| 1485 | static |
| 1486 | void varstack_preen ( D3VarParser* parser, Bool td3, Int level ) |
| 1487 | { |
| 1488 | Bool changed = False; |
| 1489 | vg_assert(parser->sp < N_D3_VAR_STACK); |
| 1490 | while (True) { |
| 1491 | vg_assert(parser->sp >= -1); |
| 1492 | if (parser->sp == -1) break; |
| 1493 | if (parser->level[parser->sp] <= level) break; |
| 1494 | if (0) |
| 1495 | TRACE_D3("BBBBAAAA varstack_pop [newsp=%d]\n", parser->sp-1); |
| 1496 | vg_assert(parser->ranges[parser->sp]); |
| 1497 | /* Who allocated this xa? get_range_list() or |
| 1498 | unitary_range_list(). */ |
| 1499 | VG_(deleteXA)( parser->ranges[parser->sp] ); |
| 1500 | parser->ranges[parser->sp] = NULL; |
| 1501 | parser->level[parser->sp] = 0; |
| 1502 | parser->isFunc[parser->sp] = False; |
| 1503 | parser->fbGX[parser->sp] = NULL; |
| 1504 | parser->sp--; |
| 1505 | changed = True; |
| 1506 | } |
| 1507 | if (changed && td3) |
| 1508 | varstack_show( parser, "after preen" ); |
| 1509 | } |
| 1510 | |
| 1511 | static void varstack_push ( CUConst* cc, |
| 1512 | D3VarParser* parser, |
| 1513 | Bool td3, |
| 1514 | XArray* ranges, Int level, |
| 1515 | Bool isFunc, GExpr* fbGX ) { |
| 1516 | if (0) |
| 1517 | TRACE_D3("BBBBAAAA varstack_push[newsp=%d]: %d %p\n", |
| 1518 | parser->sp+1, level, ranges); |
| 1519 | |
| 1520 | /* First we need to zap everything >= 'level', as we are about to |
| 1521 | replace any previous entry at 'level', so .. */ |
| 1522 | varstack_preen(parser, /*td3*/False, level-1); |
| 1523 | |
| 1524 | vg_assert(parser->sp >= -1); |
| 1525 | vg_assert(parser->sp < N_D3_VAR_STACK); |
| 1526 | if (parser->sp == N_D3_VAR_STACK-1) |
| 1527 | cc->barf("varstack_push: N_D3_VAR_STACK is too low; " |
| 1528 | "increase and recompile"); |
| 1529 | if (parser->sp >= 0) |
| 1530 | vg_assert(parser->level[parser->sp] < level); |
| 1531 | parser->sp++; |
| 1532 | vg_assert(parser->ranges[parser->sp] == NULL); |
| 1533 | vg_assert(parser->level[parser->sp] == 0); |
| 1534 | vg_assert(parser->isFunc[parser->sp] == False); |
| 1535 | vg_assert(parser->fbGX[parser->sp] == NULL); |
| 1536 | vg_assert(ranges != NULL); |
| 1537 | if (!isFunc) vg_assert(fbGX == NULL); |
| 1538 | parser->ranges[parser->sp] = ranges; |
| 1539 | parser->level[parser->sp] = level; |
| 1540 | parser->isFunc[parser->sp] = isFunc; |
| 1541 | parser->fbGX[parser->sp] = fbGX; |
| 1542 | if (td3) |
| 1543 | varstack_show( parser, "after push" ); |
| 1544 | } |
| 1545 | |
| 1546 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1547 | /* cts is derived from a DW_AT_location and so refers either to a |
| 1548 | location expression or to a location list. Figure out which, and |
| 1549 | in both cases bundle the expression or location list into a |
| 1550 | so-called GExpr (guarded expression). */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1551 | __attribute__((noinline)) |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1552 | static GExpr* get_GX ( CUConst* cc, Bool td3, const FormContents* cts ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1553 | { |
| 1554 | GExpr* gexpr = NULL; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1555 | if (cts->szB < 0) { |
| 1556 | /* represents a non-empty in-line location expression, and |
| 1557 | cts->u.cur points at the image bytes */ |
| 1558 | gexpr = make_singleton_GX( cts->u.cur, (ULong)(- cts->szB) ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1559 | } |
| 1560 | else |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1561 | if (cts->szB > 0) { |
| 1562 | /* represents a location list. cts->u.val is the offset of it |
| 1563 | in .debug_loc. */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1564 | if (!cc->cu_svma_known) |
| 1565 | cc->barf("get_GX: location list, but CU svma is unknown"); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1566 | gexpr = make_general_GX( cc, td3, cts->u.val, cc->cu_svma ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1567 | } |
| 1568 | else { |
| 1569 | vg_assert(0); /* else caller is bogus */ |
| 1570 | } |
| 1571 | return gexpr; |
| 1572 | } |
| 1573 | |
| 1574 | |
| 1575 | static |
| 1576 | void read_filename_table( /*MOD*/D3VarParser* parser, |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1577 | CUConst* cc, ULong debug_line_offset, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1578 | Bool td3 ) |
| 1579 | { |
| 1580 | Bool is_dw64; |
| 1581 | Cursor c; |
| 1582 | Word i; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1583 | UShort version; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1584 | UChar opcode_base; |
florian | 1636d33 | 2012-11-15 04:27:04 +0000 | [diff] [blame] | 1585 | HChar* str; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1586 | |
| 1587 | vg_assert(parser && cc && cc->barf); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1588 | if (!ML_(sli_is_valid)(cc->escn_debug_line) |
| 1589 | || cc->escn_debug_line.szB <= debug_line_offset) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1590 | cc->barf("read_filename_table: .debug_line is missing?"); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1591 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1592 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1593 | init_Cursor( &c, cc->escn_debug_line, debug_line_offset, cc->barf, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1594 | "Overrun whilst reading .debug_line section(1)" ); |
| 1595 | |
njn | 4c245e5 | 2009-03-15 23:25:38 +0000 | [diff] [blame] | 1596 | /* unit_length = */ |
| 1597 | get_Initial_Length( &is_dw64, &c, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1598 | "read_filename_table: invalid initial-length field" ); |
| 1599 | version = get_UShort( &c ); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1600 | if (version != 2 && version != 3 && version != 4) |
| 1601 | cc->barf("read_filename_table: Only DWARF version 2, 3 and 4 line info " |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1602 | "is currently supported."); |
njn | 4c245e5 | 2009-03-15 23:25:38 +0000 | [diff] [blame] | 1603 | /*header_length = (ULong)*/ get_Dwarfish_UWord( &c, is_dw64 ); |
| 1604 | /*minimum_instruction_length = */ get_UChar( &c ); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1605 | if (version >= 4) |
| 1606 | /*maximum_operations_per_insn = */ get_UChar( &c ); |
njn | 4c245e5 | 2009-03-15 23:25:38 +0000 | [diff] [blame] | 1607 | /*default_is_stmt = */ get_UChar( &c ); |
| 1608 | /*line_base = (Char)*/ get_UChar( &c ); |
| 1609 | /*line_range = */ get_UChar( &c ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1610 | opcode_base = get_UChar( &c ); |
| 1611 | /* skip over "standard_opcode_lengths" */ |
| 1612 | for (i = 1; i < (Word)opcode_base; i++) |
| 1613 | (void)get_UChar( &c ); |
| 1614 | |
| 1615 | /* skip over the directory names table */ |
| 1616 | while (peek_UChar(&c) != 0) { |
| 1617 | (void)get_AsciiZ(&c); |
| 1618 | } |
| 1619 | (void)get_UChar(&c); /* skip terminating zero */ |
| 1620 | |
| 1621 | /* Read and record the file names table */ |
| 1622 | vg_assert(parser->filenameTable); |
| 1623 | vg_assert( VG_(sizeXA)( parser->filenameTable ) == 0 ); |
| 1624 | /* Add a dummy index-zero entry. DWARF3 numbers its files |
| 1625 | from 1, for some reason. */ |
| 1626 | str = ML_(addStr)( cc->di, "<unknown_file>", -1 ); |
| 1627 | VG_(addToXA)( parser->filenameTable, &str ); |
| 1628 | while (peek_UChar(&c) != 0) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1629 | DiCursor cur = get_AsciiZ(&c); |
| 1630 | str = ML_(addStrFromCursor)( cc->di, cur ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1631 | TRACE_D3(" read_filename_table: %ld %s\n", |
| 1632 | VG_(sizeXA)(parser->filenameTable), str); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1633 | VG_(addToXA)( parser->filenameTable, &str ); |
| 1634 | (void)get_ULEB128( &c ); /* skip directory index # */ |
| 1635 | (void)get_ULEB128( &c ); /* skip last mod time */ |
| 1636 | (void)get_ULEB128( &c ); /* file size */ |
| 1637 | } |
| 1638 | /* We're done! The rest of it is not interesting. */ |
| 1639 | } |
| 1640 | |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 1641 | __attribute__((noinline)) |
| 1642 | static void bad_DIE_confusion(int linenr) |
| 1643 | { |
| 1644 | VG_(printf)("\nparse_var_DIE(%d): confused by:\n", linenr); |
| 1645 | } |
| 1646 | #define goto_bad_DIE do {bad_DIE_confusion(__LINE__); goto bad_DIE;} while (0) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1647 | |
| 1648 | __attribute__((noinline)) |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 1649 | static void parse_var_DIE ( |
| 1650 | /*MOD*/WordFM* /* of (XArray* of AddrRange, void) */ rangestree, |
| 1651 | /*MOD*/XArray* /* of TempVar* */ tempvars, |
| 1652 | /*MOD*/XArray* /* of GExpr* */ gexprs, |
| 1653 | /*MOD*/D3VarParser* parser, |
| 1654 | DW_TAG dtag, |
| 1655 | UWord posn, |
| 1656 | Int level, |
| 1657 | Cursor* c_die, |
| 1658 | Cursor* c_abbv, |
| 1659 | CUConst* cc, |
| 1660 | Bool td3 |
| 1661 | ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1662 | { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1663 | FormContents cts; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1664 | |
| 1665 | UWord saved_die_c_offset = get_position_of_Cursor( c_die ); |
| 1666 | UWord saved_abbv_c_offset = get_position_of_Cursor( c_abbv ); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1667 | Bool debug_types_flag; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 1668 | Bool alt_flag; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1669 | |
| 1670 | varstack_preen( parser, td3, level-1 ); |
| 1671 | |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 1672 | if (dtag == DW_TAG_compile_unit |
| 1673 | || dtag == DW_TAG_type_unit |
| 1674 | || dtag == DW_TAG_partial_unit) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1675 | Bool have_lo = False; |
| 1676 | Bool have_hi1 = False; |
sewardj | de065a0 | 2012-05-09 23:09:05 +0000 | [diff] [blame] | 1677 | Bool hiIsRelative = False; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1678 | Bool have_range = False; |
| 1679 | Addr ip_lo = 0; |
| 1680 | Addr ip_hi1 = 0; |
| 1681 | Addr rangeoff = 0; |
| 1682 | while (True) { |
| 1683 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 1684 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 1685 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1686 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 1687 | if (attr == DW_AT_low_pc && cts.szB > 0) { |
| 1688 | ip_lo = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1689 | have_lo = True; |
| 1690 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1691 | if (attr == DW_AT_high_pc && cts.szB > 0) { |
| 1692 | ip_hi1 = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1693 | have_hi1 = True; |
sewardj | de065a0 | 2012-05-09 23:09:05 +0000 | [diff] [blame] | 1694 | if (form != DW_FORM_addr) |
| 1695 | hiIsRelative = True; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1696 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1697 | if (attr == DW_AT_ranges && cts.szB > 0) { |
| 1698 | rangeoff = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1699 | have_range = True; |
| 1700 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1701 | if (attr == DW_AT_stmt_list && cts.szB > 0) { |
| 1702 | read_filename_table( parser, cc, cts.u.val, td3 ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1703 | } |
| 1704 | } |
sewardj | de065a0 | 2012-05-09 23:09:05 +0000 | [diff] [blame] | 1705 | if (have_lo && have_hi1 && hiIsRelative) |
| 1706 | ip_hi1 += ip_lo; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1707 | /* Now, does this give us an opportunity to find this |
| 1708 | CU's svma? */ |
| 1709 | #if 0 |
| 1710 | if (level == 0 && have_lo) { |
| 1711 | vg_assert(!cc->cu_svma_known); /* if this fails, it must be |
| 1712 | because we've already seen a DW_TAG_compile_unit DIE at level |
| 1713 | 0. But that can't happen, because DWARF3 only allows exactly |
| 1714 | one top level DIE per CU. */ |
| 1715 | cc->cu_svma_known = True; |
| 1716 | cc->cu_svma = ip_lo; |
| 1717 | if (1) |
| 1718 | TRACE_D3("BBBBAAAA acquire CU_SVMA of %p\n", cc->cu_svma); |
| 1719 | /* Now, it may be that this DIE doesn't tell us the CU's |
| 1720 | SVMA, by way of not having a DW_AT_low_pc. That's OK -- |
| 1721 | the CU doesn't *have* to have its SVMA specified. |
| 1722 | |
| 1723 | But as per last para D3 spec sec 3.1.1 ("Normal and |
| 1724 | Partial Compilation Unit Entries", "If the base address |
| 1725 | (viz, the SVMA) is undefined, then any DWARF entry of |
| 1726 | structure defined interms of the base address of that |
| 1727 | compilation unit is not valid.". So that means, if whilst |
| 1728 | processing the children of this top level DIE (or their |
| 1729 | children, etc) we see a DW_AT_range, and cu_svma_known is |
| 1730 | False, then the DIE that contains it is (per the spec) |
| 1731 | invalid, and we can legitimately stop and complain. */ |
| 1732 | } |
| 1733 | #else |
| 1734 | /* .. whereas The Reality is, simply assume the SVMA is zero |
| 1735 | if it isn't specified. */ |
| 1736 | if (level == 0) { |
| 1737 | vg_assert(!cc->cu_svma_known); |
| 1738 | cc->cu_svma_known = True; |
| 1739 | if (have_lo) |
| 1740 | cc->cu_svma = ip_lo; |
| 1741 | else |
| 1742 | cc->cu_svma = 0; |
| 1743 | } |
| 1744 | #endif |
| 1745 | /* Do we have something that looks sane? */ |
| 1746 | if (have_lo && have_hi1 && (!have_range)) { |
| 1747 | if (ip_lo < ip_hi1) |
| 1748 | varstack_push( cc, parser, td3, |
| 1749 | unitary_range_list(ip_lo, ip_hi1 - 1), |
| 1750 | level, |
| 1751 | False/*isFunc*/, NULL/*fbGX*/ ); |
philippe | 8130f91 | 2014-05-07 21:09:16 +0000 | [diff] [blame] | 1752 | else if (ip_lo == 0 && ip_hi1 == 0) |
| 1753 | /* CU has no code, presumably? |
| 1754 | Such situations have been encountered for code |
| 1755 | compiled with -ffunction-sections -fdata-sections |
| 1756 | and linked with --gc-sections. Completely |
| 1757 | eliminated CU gives such 0 lo/hi pc. Similarly |
| 1758 | to a CU which has no lo/hi/range pc, we push |
| 1759 | an empty range list. */ |
| 1760 | varstack_push( cc, parser, td3, |
| 1761 | empty_range_list(), |
| 1762 | level, |
| 1763 | False/*isFunc*/, NULL/*fbGX*/ ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1764 | } else |
| 1765 | if ((!have_lo) && (!have_hi1) && have_range) { |
| 1766 | varstack_push( cc, parser, td3, |
| 1767 | get_range_list( cc, td3, |
| 1768 | rangeoff, cc->cu_svma ), |
| 1769 | level, |
| 1770 | False/*isFunc*/, NULL/*fbGX*/ ); |
| 1771 | } else |
| 1772 | if ((!have_lo) && (!have_hi1) && (!have_range)) { |
| 1773 | /* CU has no code, presumably? */ |
| 1774 | varstack_push( cc, parser, td3, |
| 1775 | empty_range_list(), |
| 1776 | level, |
| 1777 | False/*isFunc*/, NULL/*fbGX*/ ); |
| 1778 | } else |
sewardj | f578a69 | 2008-06-24 09:51:55 +0000 | [diff] [blame] | 1779 | if (have_lo && (!have_hi1) && have_range && ip_lo == 0) { |
| 1780 | /* broken DIE created by gcc-4.3.X ? Ignore the |
| 1781 | apparently-redundant DW_AT_low_pc and use the DW_AT_ranges |
| 1782 | instead. */ |
| 1783 | varstack_push( cc, parser, td3, |
| 1784 | get_range_list( cc, td3, |
| 1785 | rangeoff, cc->cu_svma ), |
| 1786 | level, |
| 1787 | False/*isFunc*/, NULL/*fbGX*/ ); |
| 1788 | } else { |
| 1789 | if (0) VG_(printf)("I got hlo %d hhi1 %d hrange %d\n", |
| 1790 | (Int)have_lo, (Int)have_hi1, (Int)have_range); |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 1791 | goto_bad_DIE; |
sewardj | f578a69 | 2008-06-24 09:51:55 +0000 | [diff] [blame] | 1792 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1793 | } |
| 1794 | |
| 1795 | if (dtag == DW_TAG_lexical_block || dtag == DW_TAG_subprogram) { |
| 1796 | Bool have_lo = False; |
| 1797 | Bool have_hi1 = False; |
| 1798 | Bool have_range = False; |
sewardj | de065a0 | 2012-05-09 23:09:05 +0000 | [diff] [blame] | 1799 | Bool hiIsRelative = False; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1800 | Addr ip_lo = 0; |
| 1801 | Addr ip_hi1 = 0; |
| 1802 | Addr rangeoff = 0; |
| 1803 | Bool isFunc = dtag == DW_TAG_subprogram; |
| 1804 | GExpr* fbGX = NULL; |
| 1805 | while (True) { |
| 1806 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 1807 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 1808 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1809 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 1810 | if (attr == DW_AT_low_pc && cts.szB > 0) { |
| 1811 | ip_lo = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1812 | have_lo = True; |
| 1813 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1814 | if (attr == DW_AT_high_pc && cts.szB > 0) { |
| 1815 | ip_hi1 = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1816 | have_hi1 = True; |
sewardj | de065a0 | 2012-05-09 23:09:05 +0000 | [diff] [blame] | 1817 | if (form != DW_FORM_addr) |
| 1818 | hiIsRelative = True; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1819 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1820 | if (attr == DW_AT_ranges && cts.szB > 0) { |
| 1821 | rangeoff = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1822 | have_range = True; |
| 1823 | } |
| 1824 | if (isFunc |
| 1825 | && attr == DW_AT_frame_base |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1826 | && cts.szB != 0 /* either scalar or nonempty block */) { |
| 1827 | fbGX = get_GX( cc, False/*td3*/, &cts ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1828 | vg_assert(fbGX); |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 1829 | VG_(addToXA)(gexprs, &fbGX); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1830 | } |
| 1831 | } |
sewardj | de065a0 | 2012-05-09 23:09:05 +0000 | [diff] [blame] | 1832 | if (have_lo && have_hi1 && hiIsRelative) |
| 1833 | ip_hi1 += ip_lo; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1834 | /* Do we have something that looks sane? */ |
| 1835 | if (dtag == DW_TAG_subprogram |
| 1836 | && (!have_lo) && (!have_hi1) && (!have_range)) { |
| 1837 | /* This is legit - ignore it. Sec 3.3.3: "A subroutine entry |
| 1838 | representing a subroutine declaration that is not also a |
| 1839 | definition does not have code address or range |
| 1840 | attributes." */ |
| 1841 | } else |
| 1842 | if (dtag == DW_TAG_lexical_block |
| 1843 | && (!have_lo) && (!have_hi1) && (!have_range)) { |
| 1844 | /* I believe this is legit, and means the lexical block |
| 1845 | contains no insns (whatever that might mean). Ignore. */ |
| 1846 | } else |
| 1847 | if (have_lo && have_hi1 && (!have_range)) { |
| 1848 | /* This scope supplies just a single address range. */ |
| 1849 | if (ip_lo < ip_hi1) |
| 1850 | varstack_push( cc, parser, td3, |
| 1851 | unitary_range_list(ip_lo, ip_hi1 - 1), |
| 1852 | level, isFunc, fbGX ); |
| 1853 | } else |
| 1854 | if ((!have_lo) && (!have_hi1) && have_range) { |
| 1855 | /* This scope supplies multiple address ranges via the use of |
| 1856 | a range list. */ |
| 1857 | varstack_push( cc, parser, td3, |
| 1858 | get_range_list( cc, td3, |
| 1859 | rangeoff, cc->cu_svma ), |
| 1860 | level, isFunc, fbGX ); |
| 1861 | } else |
| 1862 | if (have_lo && (!have_hi1) && (!have_range)) { |
| 1863 | /* This scope is bogus. The D3 spec sec 3.4 (Lexical Block |
| 1864 | Entries) says fairly clearly that a scope must have either |
| 1865 | _range or (_low_pc and _high_pc). */ |
| 1866 | /* The spec is a bit ambiguous though. Perhaps a single byte |
| 1867 | range is intended? See sec 2.17 (Code Addresses And Ranges) */ |
| 1868 | /* This case is here because icc9 produced this: |
| 1869 | <2><13bd>: DW_TAG_lexical_block |
| 1870 | DW_AT_decl_line : 5229 |
| 1871 | DW_AT_decl_column : 37 |
| 1872 | DW_AT_decl_file : 1 |
| 1873 | DW_AT_low_pc : 0x401b03 |
| 1874 | */ |
| 1875 | /* Ignore (seems safe than pushing a single byte range) */ |
| 1876 | } else |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 1877 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1878 | } |
| 1879 | |
| 1880 | if (dtag == DW_TAG_variable || dtag == DW_TAG_formal_parameter) { |
florian | 1636d33 | 2012-11-15 04:27:04 +0000 | [diff] [blame] | 1881 | HChar* name = NULL; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 1882 | UWord typeR = D3_INVALID_CUOFF; |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 1883 | Bool global = False; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1884 | GExpr* gexpr = NULL; |
| 1885 | Int n_attrs = 0; |
| 1886 | UWord abs_ori = (UWord)D3_INVALID_CUOFF; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1887 | Int lineNo = 0; |
florian | 1636d33 | 2012-11-15 04:27:04 +0000 | [diff] [blame] | 1888 | HChar* fileName = NULL; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1889 | while (True) { |
| 1890 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 1891 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 1892 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1893 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1894 | n_attrs++; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1895 | if (attr == DW_AT_name && cts.szB < 0) { |
| 1896 | name = ML_(addStrFromCursor)( cc->di, cts.u.cur ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1897 | } |
| 1898 | if (attr == DW_AT_location |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1899 | && cts.szB != 0 /* either scalar or nonempty block */) { |
| 1900 | gexpr = get_GX( cc, False/*td3*/, &cts ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1901 | vg_assert(gexpr); |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 1902 | VG_(addToXA)(gexprs, &gexpr); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1903 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1904 | if (attr == DW_AT_type && cts.szB > 0) { |
| 1905 | typeR = cook_die_using_form( cc, cts.u.val, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1906 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1907 | if (attr == DW_AT_external && cts.szB > 0 && cts.u.val > 0) { |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 1908 | global = True; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1909 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1910 | if (attr == DW_AT_abstract_origin && cts.szB > 0) { |
| 1911 | abs_ori = (UWord)cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1912 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1913 | if (attr == DW_AT_declaration && cts.szB > 0 && cts.u.val > 0) { |
njn | 4c245e5 | 2009-03-15 23:25:38 +0000 | [diff] [blame] | 1914 | /*declaration = True;*/ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1915 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1916 | if (attr == DW_AT_decl_line && cts.szB > 0) { |
| 1917 | lineNo = (Int)cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1918 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1919 | if (attr == DW_AT_decl_file && cts.szB > 0) { |
| 1920 | Int ftabIx = (Int)cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1921 | if (ftabIx >= 1 |
| 1922 | && ftabIx < VG_(sizeXA)( parser->filenameTable )) { |
florian | 1636d33 | 2012-11-15 04:27:04 +0000 | [diff] [blame] | 1923 | fileName = *(HChar**) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1924 | VG_(indexXA)( parser->filenameTable, ftabIx ); |
| 1925 | vg_assert(fileName); |
| 1926 | } |
| 1927 | if (0) VG_(printf)("XXX filename = %s\n", fileName); |
| 1928 | } |
| 1929 | } |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 1930 | if (!global && dtag == DW_TAG_variable && level == 1) { |
| 1931 | /* Case of a static variable. It is better to declare |
| 1932 | it global as the variable is not really related to |
| 1933 | a PC range, as its address can be used by program |
| 1934 | counters outside of the ranges where it is visible . */ |
| 1935 | global = True; |
| 1936 | } |
| 1937 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1938 | /* We'll collect it under if one of the following three |
| 1939 | conditions holds: |
| 1940 | (1) has location and type -> completed |
| 1941 | (2) has type only -> is an abstract instance |
| 1942 | (3) has location and abs_ori -> is a concrete instance |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 1943 | Name, filename and line number are all optional frills. |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1944 | */ |
| 1945 | if ( /* 1 */ (gexpr && typeR != D3_INVALID_CUOFF) |
| 1946 | /* 2 */ || (typeR != D3_INVALID_CUOFF) |
| 1947 | /* 3 */ || (gexpr && abs_ori != (UWord)D3_INVALID_CUOFF) ) { |
| 1948 | |
| 1949 | /* Add this variable to the list of interesting looking |
| 1950 | variables. Crucially, note along with it the address |
| 1951 | range(s) associated with the variable, which for locals |
| 1952 | will be the address ranges at the top of the varparser's |
| 1953 | stack. */ |
| 1954 | GExpr* fbGX = NULL; |
| 1955 | Word i, nRanges; |
| 1956 | XArray* /* of AddrRange */ xa; |
| 1957 | TempVar* tv; |
| 1958 | /* Stack can't be empty; we put a dummy entry on it for the |
| 1959 | entire address range before starting with the DIEs for |
| 1960 | this CU. */ |
| 1961 | vg_assert(parser->sp >= 0); |
| 1962 | |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 1963 | /* If this is a local variable (non-global), try to find |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1964 | the GExpr for the DW_AT_frame_base of the containing |
| 1965 | function. It should have been pushed on the stack at the |
| 1966 | time we encountered its DW_TAG_subprogram DIE, so the way |
| 1967 | to find it is to scan back down the stack looking for it. |
| 1968 | If there isn't an enclosing stack entry marked 'isFunc' |
| 1969 | then we must be seeing variable or formal param DIEs |
| 1970 | outside of a function, so we deem the Dwarf to be |
| 1971 | malformed if that happens. Note that the fbGX may be NULL |
| 1972 | if the containing DT_TAG_subprogram didn't supply a |
| 1973 | DW_AT_frame_base -- that's OK, but there must actually be |
| 1974 | a containing DW_TAG_subprogram. */ |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 1975 | if (!global) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1976 | Bool found = False; |
| 1977 | for (i = parser->sp; i >= 0; i--) { |
| 1978 | if (parser->isFunc[i]) { |
| 1979 | fbGX = parser->fbGX[i]; |
| 1980 | found = True; |
| 1981 | break; |
| 1982 | } |
| 1983 | } |
| 1984 | if (!found) { |
| 1985 | if (0 && VG_(clo_verbosity) >= 0) { |
| 1986 | VG_(message)(Vg_DebugMsg, |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 1987 | "warning: parse_var_DIE: non-global variable " |
sewardj | 738856f | 2009-07-15 14:48:32 +0000 | [diff] [blame] | 1988 | "outside DW_TAG_subprogram\n"); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1989 | } |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 1990 | /* goto_bad_DIE; */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1991 | /* This seems to happen a lot. Just ignore it -- if, |
| 1992 | when we come to evaluation of the location (guarded) |
| 1993 | expression, it requires a frame base value, and |
| 1994 | there's no expression for that, then evaluation as a |
| 1995 | whole will fail. Harmless - a bit of a waste of |
| 1996 | cycles but nothing more. */ |
| 1997 | } |
| 1998 | } |
| 1999 | |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 2000 | /* re "global ? 0 : parser->sp" (twice), if the var is |
| 2001 | marked 'global' then we must put it at the global scope, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2002 | as only the global scope (level 0) covers the entire PC |
| 2003 | address space. It is asserted elsewhere that level 0 |
| 2004 | always covers the entire address space. */ |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 2005 | xa = parser->ranges[global ? 0 : parser->sp]; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2006 | nRanges = VG_(sizeXA)(xa); |
| 2007 | vg_assert(nRanges >= 0); |
| 2008 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2009 | tv = ML_(dinfo_zalloc)( "di.readdwarf3.pvD.1", sizeof(TempVar) ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2010 | tv->name = name; |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 2011 | tv->level = global ? 0 : parser->sp; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2012 | tv->typeR = typeR; |
| 2013 | tv->gexpr = gexpr; |
| 2014 | tv->fbGX = fbGX; |
| 2015 | tv->fName = fileName; |
| 2016 | tv->fLine = lineNo; |
| 2017 | tv->dioff = posn; |
| 2018 | tv->absOri = abs_ori; |
| 2019 | |
| 2020 | /* See explanation on definition of type TempVar for the |
| 2021 | reason for this elaboration. */ |
| 2022 | tv->nRanges = nRanges; |
| 2023 | tv->rngOneMin = 0; |
| 2024 | tv->rngOneMax = 0; |
| 2025 | tv->rngMany = NULL; |
| 2026 | if (nRanges == 1) { |
| 2027 | AddrRange* range = VG_(indexXA)(xa, 0); |
| 2028 | tv->rngOneMin = range->aMin; |
| 2029 | tv->rngOneMax = range->aMax; |
| 2030 | } |
| 2031 | else if (nRanges > 1) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2032 | /* See if we already have a range list which is |
| 2033 | structurally identical. If so, use that; if not, clone |
| 2034 | this one, and add it to our collection. */ |
| 2035 | UWord keyW, valW; |
| 2036 | if (VG_(lookupFM)( rangestree, &keyW, &valW, (UWord)xa )) { |
| 2037 | XArray* old = (XArray*)keyW; |
| 2038 | tl_assert(valW == 0); |
| 2039 | tl_assert(old != xa); |
| 2040 | tv->rngMany = old; |
| 2041 | } else { |
| 2042 | XArray* cloned = VG_(cloneXA)( "di.readdwarf3.pvD.2", xa ); |
| 2043 | tv->rngMany = cloned; |
| 2044 | VG_(addToFM)( rangestree, (UWord)cloned, 0 ); |
| 2045 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2046 | } |
| 2047 | |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 2048 | VG_(addToXA)( tempvars, &tv ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2049 | |
| 2050 | TRACE_D3(" Recording this variable, with %ld PC range(s)\n", |
| 2051 | VG_(sizeXA)(xa) ); |
| 2052 | /* collect stats on how effective the ->ranges special |
| 2053 | casing is */ |
| 2054 | if (0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2055 | static Int ntot=0, ngt=0; |
| 2056 | ntot++; |
| 2057 | if (tv->rngMany) ngt++; |
| 2058 | if (0 == (ntot % 100000)) |
| 2059 | VG_(printf)("XXXX %d tot, %d cloned\n", ntot, ngt); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2060 | } |
| 2061 | |
| 2062 | } |
| 2063 | |
| 2064 | /* Here are some other weird cases seen in the wild: |
| 2065 | |
| 2066 | We have a variable with a name and a type, but no |
| 2067 | location. I guess that's a sign that it has been |
| 2068 | optimised away. Ignore it. Here's an example: |
| 2069 | |
| 2070 | static Int lc_compar(void* n1, void* n2) { |
| 2071 | MC_Chunk* mc1 = *(MC_Chunk**)n1; |
| 2072 | MC_Chunk* mc2 = *(MC_Chunk**)n2; |
| 2073 | return (mc1->data < mc2->data ? -1 : 1); |
| 2074 | } |
| 2075 | |
| 2076 | Both mc1 and mc2 are like this |
| 2077 | <2><5bc>: Abbrev Number: 21 (DW_TAG_variable) |
| 2078 | DW_AT_name : mc1 |
| 2079 | DW_AT_decl_file : 1 |
| 2080 | DW_AT_decl_line : 216 |
| 2081 | DW_AT_type : <5d3> |
| 2082 | |
| 2083 | whereas n1 and n2 do have locations specified. |
| 2084 | |
| 2085 | --------------------------------------------- |
| 2086 | |
| 2087 | We see a DW_TAG_formal_parameter with a type, but |
| 2088 | no name and no location. It's probably part of a function type |
| 2089 | construction, thusly, hence ignore it: |
| 2090 | <1><2b4>: Abbrev Number: 12 (DW_TAG_subroutine_type) |
| 2091 | DW_AT_sibling : <2c9> |
| 2092 | DW_AT_prototyped : 1 |
| 2093 | DW_AT_type : <114> |
| 2094 | <2><2be>: Abbrev Number: 13 (DW_TAG_formal_parameter) |
| 2095 | DW_AT_type : <13e> |
| 2096 | <2><2c3>: Abbrev Number: 13 (DW_TAG_formal_parameter) |
| 2097 | DW_AT_type : <133> |
| 2098 | |
| 2099 | --------------------------------------------- |
| 2100 | |
| 2101 | Is very minimal, like this: |
| 2102 | <4><81d>: Abbrev Number: 44 (DW_TAG_variable) |
| 2103 | DW_AT_abstract_origin: <7ba> |
| 2104 | What that signifies I have no idea. Ignore. |
| 2105 | |
| 2106 | ---------------------------------------------- |
| 2107 | |
| 2108 | Is very minimal, like this: |
| 2109 | <200f>: DW_TAG_formal_parameter |
| 2110 | DW_AT_abstract_ori: <1f4c> |
| 2111 | DW_AT_location : 13440 |
| 2112 | What that signifies I have no idea. Ignore. |
| 2113 | It might be significant, though: the variable at least |
| 2114 | has a location and so might exist somewhere. |
| 2115 | Maybe we should handle this. |
| 2116 | |
| 2117 | --------------------------------------------- |
| 2118 | |
| 2119 | <22407>: DW_TAG_variable |
| 2120 | DW_AT_name : (indirect string, offset: 0x6579): |
| 2121 | vgPlain_trampoline_stuff_start |
| 2122 | DW_AT_decl_file : 29 |
| 2123 | DW_AT_decl_line : 56 |
| 2124 | DW_AT_external : 1 |
| 2125 | DW_AT_declaration : 1 |
| 2126 | |
| 2127 | Nameless and typeless variable that has a location? Who |
| 2128 | knows. Not me. |
| 2129 | <2><3d178>: Abbrev Number: 22 (DW_TAG_variable) |
| 2130 | DW_AT_location : 9 byte block: 3 c0 c7 13 38 0 0 0 0 |
| 2131 | (DW_OP_addr: 3813c7c0) |
| 2132 | |
| 2133 | No, really. Check it out. gcc is quite simply borked. |
| 2134 | <3><168cc>: Abbrev Number: 141 (DW_TAG_variable) |
| 2135 | // followed by no attributes, and the next DIE is a sibling, |
| 2136 | // not a child |
| 2137 | */ |
| 2138 | } |
| 2139 | return; |
| 2140 | |
| 2141 | bad_DIE: |
| 2142 | set_position_of_Cursor( c_die, saved_die_c_offset ); |
| 2143 | set_position_of_Cursor( c_abbv, saved_abbv_c_offset ); |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 2144 | posn = uncook_die( cc, posn, &debug_types_flag, &alt_flag ); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 2145 | VG_(printf)(" <%d><%lx>: %s", level, posn, ML_(pp_DW_TAG)( dtag ) ); |
| 2146 | if (debug_types_flag) { |
| 2147 | VG_(printf)(" (in .debug_types)"); |
| 2148 | } |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 2149 | else if (alt_flag) { |
| 2150 | VG_(printf)(" (in alternate .debug_info)"); |
| 2151 | } |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 2152 | VG_(printf)("\n"); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2153 | while (True) { |
| 2154 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 2155 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 2156 | if (attr == 0 && form == 0) break; |
| 2157 | VG_(printf)(" %18s: ", ML_(pp_DW_AT)(attr)); |
| 2158 | /* Get the form contents, so as to print them */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2159 | get_Form_contents( &cts, cc, c_die, True, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2160 | VG_(printf)("\t\n"); |
| 2161 | } |
| 2162 | VG_(printf)("\n"); |
| 2163 | cc->barf("parse_var_DIE: confused by the above DIE"); |
| 2164 | /*NOTREACHED*/ |
| 2165 | } |
| 2166 | |
| 2167 | |
| 2168 | /*------------------------------------------------------------*/ |
| 2169 | /*--- ---*/ |
| 2170 | /*--- Parsing of type-related DIEs ---*/ |
| 2171 | /*--- ---*/ |
| 2172 | /*------------------------------------------------------------*/ |
| 2173 | |
| 2174 | #define N_D3_TYPE_STACK 16 |
| 2175 | |
| 2176 | typedef |
| 2177 | struct { |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 2178 | /* What source language? 'A'=Ada83/95, |
| 2179 | 'C'=C/C++, |
| 2180 | 'F'=Fortran, |
| 2181 | '?'=other |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2182 | Established once per compilation unit. */ |
| 2183 | UChar language; |
| 2184 | /* A stack of types which are currently under construction */ |
| 2185 | Int sp; /* [sp] is innermost active entry; sp==-1 for empty |
| 2186 | stack */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2187 | /* Note that the TyEnts in qparentE are temporary copies of the |
| 2188 | ones accumulating in the main tyent array. So it is not safe |
| 2189 | to free up anything on them when popping them off the stack |
| 2190 | (iow, it isn't safe to use TyEnt__make_EMPTY on them). Just |
| 2191 | memset them to zero when done. */ |
| 2192 | TyEnt qparentE[N_D3_TYPE_STACK]; /* parent TyEnts */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2193 | Int qlevel[N_D3_TYPE_STACK]; |
| 2194 | |
| 2195 | } |
| 2196 | D3TypeParser; |
| 2197 | |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 2198 | static void typestack_show ( D3TypeParser* parser, const HChar* str ) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2199 | Word i; |
| 2200 | VG_(printf)(" typestack (%s) {\n", str); |
| 2201 | for (i = 0; i <= parser->sp; i++) { |
| 2202 | VG_(printf)(" [%ld] (level %d): ", i, parser->qlevel[i]); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2203 | ML_(pp_TyEnt)( &parser->qparentE[i] ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2204 | VG_(printf)("\n"); |
| 2205 | } |
| 2206 | VG_(printf)(" }\n"); |
| 2207 | } |
| 2208 | |
| 2209 | /* Remove from the stack, all entries with .level > 'level' */ |
| 2210 | static |
| 2211 | void typestack_preen ( D3TypeParser* parser, Bool td3, Int level ) |
| 2212 | { |
| 2213 | Bool changed = False; |
| 2214 | vg_assert(parser->sp < N_D3_TYPE_STACK); |
| 2215 | while (True) { |
| 2216 | vg_assert(parser->sp >= -1); |
| 2217 | if (parser->sp == -1) break; |
| 2218 | if (parser->qlevel[parser->sp] <= level) break; |
| 2219 | if (0) |
| 2220 | TRACE_D3("BBBBAAAA typestack_pop [newsp=%d]\n", parser->sp-1); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2221 | vg_assert(ML_(TyEnt__is_type)(&parser->qparentE[parser->sp])); |
| 2222 | VG_(memset)(&parser->qparentE[parser->sp], 0, sizeof(TyEnt)); |
| 2223 | parser->qparentE[parser->sp].cuOff = D3_INVALID_CUOFF; |
| 2224 | parser->qparentE[parser->sp].tag = Te_EMPTY; |
| 2225 | parser->qlevel[parser->sp] = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2226 | parser->sp--; |
| 2227 | changed = True; |
| 2228 | } |
| 2229 | if (changed && td3) |
| 2230 | typestack_show( parser, "after preen" ); |
| 2231 | } |
| 2232 | |
| 2233 | static Bool typestack_is_empty ( D3TypeParser* parser ) { |
| 2234 | vg_assert(parser->sp >= -1 && parser->sp < N_D3_TYPE_STACK); |
| 2235 | return parser->sp == -1; |
| 2236 | } |
| 2237 | |
| 2238 | static void typestack_push ( CUConst* cc, |
| 2239 | D3TypeParser* parser, |
| 2240 | Bool td3, |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2241 | TyEnt* parentE, Int level ) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2242 | if (0) |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2243 | TRACE_D3("BBBBAAAA typestack_push[newsp=%d]: %d %05lx\n", |
| 2244 | parser->sp+1, level, parentE->cuOff); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2245 | |
| 2246 | /* First we need to zap everything >= 'level', as we are about to |
| 2247 | replace any previous entry at 'level', so .. */ |
| 2248 | typestack_preen(parser, /*td3*/False, level-1); |
| 2249 | |
| 2250 | vg_assert(parser->sp >= -1); |
| 2251 | vg_assert(parser->sp < N_D3_TYPE_STACK); |
| 2252 | if (parser->sp == N_D3_TYPE_STACK-1) |
| 2253 | cc->barf("typestack_push: N_D3_TYPE_STACK is too low; " |
| 2254 | "increase and recompile"); |
| 2255 | if (parser->sp >= 0) |
| 2256 | vg_assert(parser->qlevel[parser->sp] < level); |
| 2257 | parser->sp++; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2258 | vg_assert(parser->qparentE[parser->sp].tag == Te_EMPTY); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2259 | vg_assert(parser->qlevel[parser->sp] == 0); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2260 | vg_assert(parentE); |
| 2261 | vg_assert(ML_(TyEnt__is_type)(parentE)); |
| 2262 | vg_assert(parentE->cuOff != D3_INVALID_CUOFF); |
| 2263 | parser->qparentE[parser->sp] = *parentE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2264 | parser->qlevel[parser->sp] = level; |
| 2265 | if (td3) |
| 2266 | typestack_show( parser, "after push" ); |
| 2267 | } |
| 2268 | |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 2269 | /* True if the subrange type being parsed gives the bounds of an array. */ |
| 2270 | static Bool subrange_type_denotes_array_bounds ( D3TypeParser* parser, |
| 2271 | DW_TAG dtag ) { |
| 2272 | vg_assert(dtag == DW_TAG_subrange_type); |
| 2273 | /* For most languages, a subrange_type dtag always gives the |
| 2274 | bounds of an array. |
| 2275 | For Ada, there are additional conditions as a subrange_type |
| 2276 | is also used for other purposes. */ |
| 2277 | if (parser->language != 'A') |
| 2278 | /* not Ada, so it definitely denotes an array bound. */ |
| 2279 | return True; |
| 2280 | else |
| 2281 | /* Extra constraints for Ada: it only denotes an array bound if .. */ |
| 2282 | return (! typestack_is_empty(parser) |
| 2283 | && parser->qparentE[parser->sp].tag == Te_TyArray); |
| 2284 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2285 | |
| 2286 | /* Parse a type-related DIE. 'parser' holds the current parser state. |
| 2287 | 'admin' is where the completed types are dumped. 'dtag' is the tag |
| 2288 | for this DIE. 'c_die' points to the start of the data fields (FORM |
| 2289 | stuff) for the DIE. c_abbv points to the start of the (name,form) |
| 2290 | pairs which describe the DIE. |
| 2291 | |
| 2292 | We may find the DIE uninteresting, in which case we should ignore |
| 2293 | it. |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2294 | |
| 2295 | What happens: the DIE is examined. If uninteresting, it is ignored. |
| 2296 | Otherwise, the DIE gives rise to two things: |
| 2297 | |
| 2298 | (1) the offset of this DIE in the CU -- the cuOffset, a UWord |
| 2299 | (2) a TyAdmin structure, which holds the type, or related stuff |
| 2300 | |
| 2301 | (2) is added at the end of 'tyadmins', at some index, say 'i'. |
| 2302 | |
| 2303 | A pair (cuOffset, i) is added to 'tydict'. |
| 2304 | |
| 2305 | Hence 'tyadmins' holds the actual type entities, and 'tydict' holds |
| 2306 | a mapping from cuOffset to the index of the corresponding entry in |
| 2307 | 'tyadmin'. |
| 2308 | |
| 2309 | When resolving a cuOffset to a TyAdmin, first look up the cuOffset |
| 2310 | in the tydict (by binary search). This gives an index into |
| 2311 | tyadmins, and the required entity lives in tyadmins at that index. |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2312 | */ |
| 2313 | __attribute__((noinline)) |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2314 | static void parse_type_DIE ( /*MOD*/XArray* /* of TyEnt */ tyents, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2315 | /*MOD*/D3TypeParser* parser, |
| 2316 | DW_TAG dtag, |
| 2317 | UWord posn, |
| 2318 | Int level, |
| 2319 | Cursor* c_die, |
| 2320 | Cursor* c_abbv, |
| 2321 | CUConst* cc, |
| 2322 | Bool td3 ) |
| 2323 | { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2324 | FormContents cts; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2325 | TyEnt typeE; |
| 2326 | TyEnt atomE; |
| 2327 | TyEnt fieldE; |
| 2328 | TyEnt boundE; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 2329 | Bool debug_types_flag; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 2330 | Bool alt_flag; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2331 | |
| 2332 | UWord saved_die_c_offset = get_position_of_Cursor( c_die ); |
| 2333 | UWord saved_abbv_c_offset = get_position_of_Cursor( c_abbv ); |
| 2334 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2335 | VG_(memset)( &typeE, 0xAA, sizeof(typeE) ); |
| 2336 | VG_(memset)( &atomE, 0xAA, sizeof(atomE) ); |
| 2337 | VG_(memset)( &fieldE, 0xAA, sizeof(fieldE) ); |
| 2338 | VG_(memset)( &boundE, 0xAA, sizeof(boundE) ); |
| 2339 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2340 | /* If we've returned to a level at or above any previously noted |
| 2341 | parent, un-note it, so we don't believe we're still collecting |
| 2342 | its children. */ |
| 2343 | typestack_preen( parser, td3, level-1 ); |
| 2344 | |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 2345 | if (dtag == DW_TAG_compile_unit |
| 2346 | || dtag == DW_TAG_type_unit |
| 2347 | || dtag == DW_TAG_partial_unit) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2348 | /* See if we can find DW_AT_language, since it is important for |
| 2349 | establishing array bounds (see DW_TAG_subrange_type below in |
| 2350 | this fn) */ |
| 2351 | while (True) { |
| 2352 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 2353 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 2354 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2355 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2356 | if (attr != DW_AT_language) |
| 2357 | continue; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2358 | if (cts.szB <= 0) |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2359 | goto_bad_DIE; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2360 | switch (cts.u.val) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2361 | case DW_LANG_C89: case DW_LANG_C: |
| 2362 | case DW_LANG_C_plus_plus: case DW_LANG_ObjC: |
| 2363 | case DW_LANG_ObjC_plus_plus: case DW_LANG_UPC: |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 2364 | case DW_LANG_Upc: case DW_LANG_C99: |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2365 | parser->language = 'C'; break; |
| 2366 | case DW_LANG_Fortran77: case DW_LANG_Fortran90: |
| 2367 | case DW_LANG_Fortran95: |
| 2368 | parser->language = 'F'; break; |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 2369 | case DW_LANG_Ada83: case DW_LANG_Ada95: |
| 2370 | parser->language = 'A'; break; |
| 2371 | case DW_LANG_Cobol74: |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2372 | case DW_LANG_Cobol85: case DW_LANG_Pascal83: |
| 2373 | case DW_LANG_Modula2: case DW_LANG_Java: |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 2374 | case DW_LANG_PLI: |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 2375 | case DW_LANG_D: case DW_LANG_Python: |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2376 | case DW_LANG_Mips_Assembler: |
| 2377 | parser->language = '?'; break; |
| 2378 | default: |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2379 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2380 | } |
| 2381 | } |
| 2382 | } |
| 2383 | |
| 2384 | if (dtag == DW_TAG_base_type) { |
| 2385 | /* We can pick up a new base type any time. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2386 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 2387 | typeE.cuOff = D3_INVALID_CUOFF; |
| 2388 | typeE.tag = Te_TyBase; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2389 | while (True) { |
| 2390 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 2391 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 2392 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2393 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2394 | if (attr == DW_AT_name && cts.szB < 0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2395 | typeE.Te.TyBase.name |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2396 | = ML_(cur_read_strdup)( cts.u.cur, |
| 2397 | "di.readdwarf3.ptD.base_type.1" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2398 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2399 | if (attr == DW_AT_byte_size && cts.szB > 0) { |
| 2400 | typeE.Te.TyBase.szB = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2401 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2402 | if (attr == DW_AT_encoding && cts.szB > 0) { |
| 2403 | switch (cts.u.val) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2404 | case DW_ATE_unsigned: case DW_ATE_unsigned_char: |
tom | 50c5093 | 2010-10-18 14:57:58 +0000 | [diff] [blame] | 2405 | case DW_ATE_UTF: /* since DWARF4, e.g. char16_t from C++ */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2406 | case DW_ATE_boolean:/* FIXME - is this correct? */ |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 2407 | case DW_ATE_unsigned_fixed: |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2408 | typeE.Te.TyBase.enc = 'U'; break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2409 | case DW_ATE_signed: case DW_ATE_signed_char: |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 2410 | case DW_ATE_signed_fixed: |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2411 | typeE.Te.TyBase.enc = 'S'; break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2412 | case DW_ATE_float: |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2413 | typeE.Te.TyBase.enc = 'F'; break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2414 | case DW_ATE_complex_float: |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2415 | typeE.Te.TyBase.enc = 'C'; break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2416 | default: |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2417 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2418 | } |
| 2419 | } |
| 2420 | } |
| 2421 | |
| 2422 | /* Invent a name if it doesn't have one. gcc-4.3 |
| 2423 | -ftree-vectorize is observed to emit nameless base types. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2424 | if (!typeE.Te.TyBase.name) |
| 2425 | typeE.Te.TyBase.name |
| 2426 | = ML_(dinfo_strdup)( "di.readdwarf3.ptD.base_type.2", |
| 2427 | "<anon_base_type>" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2428 | |
| 2429 | /* Do we have something that looks sane? */ |
| 2430 | if (/* must have a name */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2431 | typeE.Te.TyBase.name == NULL |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2432 | /* and a plausible size. Yes, really 32: "complex long |
| 2433 | double" apparently has size=32 */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2434 | || typeE.Te.TyBase.szB < 0 || typeE.Te.TyBase.szB > 32 |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2435 | /* and a plausible encoding */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2436 | || (typeE.Te.TyBase.enc != 'U' |
| 2437 | && typeE.Te.TyBase.enc != 'S' |
| 2438 | && typeE.Te.TyBase.enc != 'F' |
| 2439 | && typeE.Te.TyBase.enc != 'C')) |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2440 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2441 | /* Last minute hack: if we see this |
| 2442 | <1><515>: DW_TAG_base_type |
| 2443 | DW_AT_byte_size : 0 |
| 2444 | DW_AT_encoding : 5 |
| 2445 | DW_AT_name : void |
| 2446 | convert it into a real Void type. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2447 | if (typeE.Te.TyBase.szB == 0 |
| 2448 | && 0 == VG_(strcmp)("void", typeE.Te.TyBase.name)) { |
| 2449 | ML_(TyEnt__make_EMPTY)(&typeE); |
| 2450 | typeE.tag = Te_TyVoid; |
| 2451 | typeE.Te.TyVoid.isFake = False; /* it's a real one! */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2452 | } |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2453 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2454 | goto acquire_Type; |
| 2455 | } |
| 2456 | |
bart | 0e947cf | 2012-02-01 14:59:14 +0000 | [diff] [blame] | 2457 | /* |
| 2458 | * An example of DW_TAG_rvalue_reference_type: |
| 2459 | * |
| 2460 | * $ readelf --debug-dump /usr/lib/debug/usr/lib/libstdc++.so.6.0.16.debug |
| 2461 | * <1><1014>: Abbrev Number: 55 (DW_TAG_rvalue_reference_type) |
| 2462 | * <1015> DW_AT_byte_size : 4 |
| 2463 | * <1016> DW_AT_type : <0xe52> |
| 2464 | */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2465 | if (dtag == DW_TAG_pointer_type || dtag == DW_TAG_reference_type |
bart | 0e947cf | 2012-02-01 14:59:14 +0000 | [diff] [blame] | 2466 | || dtag == DW_TAG_ptr_to_member_type |
| 2467 | || dtag == DW_TAG_rvalue_reference_type) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2468 | /* This seems legit for _pointer_type and _reference_type. I |
| 2469 | don't know if rolling _ptr_to_member_type in here really is |
| 2470 | legit, but it's better than not handling it at all. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2471 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 2472 | typeE.cuOff = D3_INVALID_CUOFF; |
bart | 0e947cf | 2012-02-01 14:59:14 +0000 | [diff] [blame] | 2473 | switch (dtag) { |
| 2474 | case DW_TAG_pointer_type: |
| 2475 | typeE.tag = Te_TyPtr; |
| 2476 | break; |
| 2477 | case DW_TAG_reference_type: |
| 2478 | typeE.tag = Te_TyRef; |
| 2479 | break; |
| 2480 | case DW_TAG_ptr_to_member_type: |
| 2481 | typeE.tag = Te_TyPtrMbr; |
| 2482 | break; |
| 2483 | case DW_TAG_rvalue_reference_type: |
| 2484 | typeE.tag = Te_TyRvalRef; |
| 2485 | break; |
| 2486 | default: |
| 2487 | vg_assert(False); |
| 2488 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2489 | /* target type defaults to void */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2490 | typeE.Te.TyPorR.typeR = D3_FAKEVOID_CUOFF; |
bart | 0e947cf | 2012-02-01 14:59:14 +0000 | [diff] [blame] | 2491 | /* These four type kinds don't *have* to specify their size, in |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 2492 | which case we assume it's a machine word. But if they do |
| 2493 | specify it, it must be a machine word :-) This probably |
| 2494 | assumes that the word size of the Dwarf3 we're reading is the |
| 2495 | same size as that on the machine. gcc appears to give a size |
| 2496 | whereas icc9 doesn't. */ |
| 2497 | typeE.Te.TyPorR.szB = sizeof(UWord); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2498 | while (True) { |
| 2499 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 2500 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 2501 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2502 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2503 | if (attr == DW_AT_byte_size && cts.szB > 0) { |
| 2504 | typeE.Te.TyPorR.szB = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2505 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2506 | if (attr == DW_AT_type && cts.szB > 0) { |
| 2507 | typeE.Te.TyPorR.typeR |
| 2508 | = cook_die_using_form( cc, (UWord)cts.u.val, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2509 | } |
| 2510 | } |
| 2511 | /* Do we have something that looks sane? */ |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 2512 | if (typeE.Te.TyPorR.szB != sizeof(UWord)) |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2513 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2514 | else |
| 2515 | goto acquire_Type; |
| 2516 | } |
| 2517 | |
| 2518 | if (dtag == DW_TAG_enumeration_type) { |
| 2519 | /* Create a new Type to hold the results. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2520 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 2521 | typeE.cuOff = posn; |
| 2522 | typeE.tag = Te_TyEnum; |
mjw | 9d82d0f | 2013-06-28 14:03:58 +0000 | [diff] [blame] | 2523 | Bool is_decl = False; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2524 | typeE.Te.TyEnum.atomRs |
| 2525 | = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.ptD.enum_type.1", |
| 2526 | ML_(dinfo_free), |
| 2527 | sizeof(UWord) ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2528 | while (True) { |
| 2529 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 2530 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 2531 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2532 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2533 | if (attr == DW_AT_name && cts.szB < 0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2534 | typeE.Te.TyEnum.name |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2535 | = ML_(cur_read_strdup)( cts.u.cur, |
| 2536 | "di.readdwarf3.pTD.enum_type.2" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2537 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2538 | if (attr == DW_AT_byte_size && cts.szB > 0) { |
| 2539 | typeE.Te.TyEnum.szB = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2540 | } |
mjw | 9d82d0f | 2013-06-28 14:03:58 +0000 | [diff] [blame] | 2541 | if (attr == DW_AT_declaration) { |
| 2542 | is_decl = True; |
| 2543 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2544 | } |
sewardj | 6ece231 | 2009-01-24 01:44:15 +0000 | [diff] [blame] | 2545 | |
| 2546 | if (!typeE.Te.TyEnum.name) |
| 2547 | typeE.Te.TyEnum.name |
| 2548 | = ML_(dinfo_strdup)( "di.readdwarf3.pTD.enum_type.3", |
| 2549 | "<anon_enum_type>" ); |
| 2550 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2551 | /* Do we have something that looks sane? */ |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 2552 | if (typeE.Te.TyEnum.szB == 0 |
| 2553 | /* we must know the size */ |
| 2554 | /* but not for Ada, which uses such dummy |
mjw | 9d82d0f | 2013-06-28 14:03:58 +0000 | [diff] [blame] | 2555 | enumerations as helper for gdb ada mode. |
| 2556 | Also GCC allows incomplete enums as GNU extension. |
| 2557 | http://gcc.gnu.org/onlinedocs/gcc/Incomplete-Enums.html |
| 2558 | These are marked as DW_AT_declaration and won't have |
| 2559 | a size. They can only be used in declaration or as |
| 2560 | pointer types. You can't allocate variables or storage |
| 2561 | using such an enum type. (Also GCC seems to have a bug |
| 2562 | that will put such an enumeration_type into a .debug_types |
| 2563 | unit which should only contain complete types.) */ |
| 2564 | && (parser->language != 'A' && !is_decl)) { |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2565 | goto_bad_DIE; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 2566 | } |
| 2567 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2568 | /* On't stack! */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2569 | typestack_push( cc, parser, td3, &typeE, level ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2570 | goto acquire_Type; |
| 2571 | } |
| 2572 | |
sewardj | f3aaa33 | 2008-10-23 10:54:40 +0000 | [diff] [blame] | 2573 | /* gcc (GCC) 4.4.0 20081017 (experimental) occasionally produces |
| 2574 | DW_TAG_enumerator with only a DW_AT_name but no |
| 2575 | DW_AT_const_value. This is in violation of the Dwarf3 standard, |
| 2576 | and appears to be a new "feature" of gcc - versions 4.3.x and |
| 2577 | earlier do not appear to do this. So accept DW_TAG_enumerator |
| 2578 | which only have a name but no value. An example: |
| 2579 | |
| 2580 | <1><180>: Abbrev Number: 6 (DW_TAG_enumeration_type) |
| 2581 | <181> DW_AT_name : (indirect string, offset: 0xda70): |
| 2582 | QtMsgType |
| 2583 | <185> DW_AT_byte_size : 4 |
| 2584 | <186> DW_AT_decl_file : 14 |
| 2585 | <187> DW_AT_decl_line : 1480 |
| 2586 | <189> DW_AT_sibling : <0x1a7> |
| 2587 | <2><18d>: Abbrev Number: 7 (DW_TAG_enumerator) |
| 2588 | <18e> DW_AT_name : (indirect string, offset: 0x9e18): |
| 2589 | QtDebugMsg |
| 2590 | <2><192>: Abbrev Number: 7 (DW_TAG_enumerator) |
| 2591 | <193> DW_AT_name : (indirect string, offset: 0x1505f): |
| 2592 | QtWarningMsg |
| 2593 | <2><197>: Abbrev Number: 7 (DW_TAG_enumerator) |
| 2594 | <198> DW_AT_name : (indirect string, offset: 0x16f4a): |
| 2595 | QtCriticalMsg |
| 2596 | <2><19c>: Abbrev Number: 7 (DW_TAG_enumerator) |
| 2597 | <19d> DW_AT_name : (indirect string, offset: 0x156dd): |
| 2598 | QtFatalMsg |
| 2599 | <2><1a1>: Abbrev Number: 7 (DW_TAG_enumerator) |
| 2600 | <1a2> DW_AT_name : (indirect string, offset: 0x13660): |
| 2601 | QtSystemMsg |
| 2602 | */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2603 | if (dtag == DW_TAG_enumerator) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2604 | VG_(memset)( &atomE, 0, sizeof(atomE) ); |
| 2605 | atomE.cuOff = posn; |
| 2606 | atomE.tag = Te_Atom; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2607 | while (True) { |
| 2608 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 2609 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 2610 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2611 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2612 | if (attr == DW_AT_name && cts.szB < 0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2613 | atomE.Te.Atom.name |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2614 | = ML_(cur_read_strdup)( cts.u.cur, |
| 2615 | "di.readdwarf3.pTD.enumerator.1" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2616 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2617 | if (attr == DW_AT_const_value && cts.szB > 0) { |
| 2618 | atomE.Te.Atom.value = cts.u.val; |
sewardj | f3aaa33 | 2008-10-23 10:54:40 +0000 | [diff] [blame] | 2619 | atomE.Te.Atom.valueKnown = True; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2620 | } |
| 2621 | } |
| 2622 | /* Do we have something that looks sane? */ |
sewardj | f3aaa33 | 2008-10-23 10:54:40 +0000 | [diff] [blame] | 2623 | if (atomE.Te.Atom.name == NULL) |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2624 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2625 | /* Do we have a plausible parent? */ |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2626 | if (typestack_is_empty(parser)) goto_bad_DIE; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2627 | vg_assert(ML_(TyEnt__is_type)(&parser->qparentE[parser->sp])); |
| 2628 | vg_assert(parser->qparentE[parser->sp].cuOff != D3_INVALID_CUOFF); |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2629 | if (level != parser->qlevel[parser->sp]+1) goto_bad_DIE; |
| 2630 | if (parser->qparentE[parser->sp].tag != Te_TyEnum) goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2631 | /* Record this child in the parent */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2632 | vg_assert(parser->qparentE[parser->sp].Te.TyEnum.atomRs); |
| 2633 | VG_(addToXA)( parser->qparentE[parser->sp].Te.TyEnum.atomRs, |
| 2634 | &atomE ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2635 | /* And record the child itself */ |
| 2636 | goto acquire_Atom; |
| 2637 | } |
| 2638 | |
sewardj | 6a3a284 | 2008-08-20 08:14:07 +0000 | [diff] [blame] | 2639 | /* Treat DW_TAG_class_type as if it was a DW_TAG_structure_type. I |
| 2640 | don't know if this is correct, but it at least makes this reader |
| 2641 | usable for gcc-4.3 produced Dwarf3. */ |
| 2642 | if (dtag == DW_TAG_structure_type || dtag == DW_TAG_class_type |
| 2643 | || dtag == DW_TAG_union_type) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2644 | Bool have_szB = False; |
| 2645 | Bool is_decl = False; |
| 2646 | Bool is_spec = False; |
| 2647 | /* Create a new Type to hold the results. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2648 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 2649 | typeE.cuOff = posn; |
| 2650 | typeE.tag = Te_TyStOrUn; |
| 2651 | typeE.Te.TyStOrUn.name = NULL; |
dejanj | 0abc419 | 2014-04-04 10:20:03 +0000 | [diff] [blame] | 2652 | typeE.Te.TyStOrUn.typeR = D3_INVALID_CUOFF; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2653 | typeE.Te.TyStOrUn.fieldRs |
| 2654 | = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.pTD.struct_type.1", |
| 2655 | ML_(dinfo_free), |
| 2656 | sizeof(UWord) ); |
| 2657 | typeE.Te.TyStOrUn.complete = True; |
| 2658 | typeE.Te.TyStOrUn.isStruct = dtag == DW_TAG_structure_type |
| 2659 | || dtag == DW_TAG_class_type; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2660 | while (True) { |
| 2661 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 2662 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 2663 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2664 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2665 | if (attr == DW_AT_name && cts.szB < 0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2666 | typeE.Te.TyStOrUn.name |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2667 | = ML_(cur_read_strdup)( cts.u.cur, |
| 2668 | "di.readdwarf3.ptD.struct_type.2" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2669 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2670 | if (attr == DW_AT_byte_size && cts.szB >= 0) { |
| 2671 | typeE.Te.TyStOrUn.szB = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2672 | have_szB = True; |
| 2673 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2674 | if (attr == DW_AT_declaration && cts.szB > 0 && cts.u.val > 0) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2675 | is_decl = True; |
| 2676 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2677 | if (attr == DW_AT_specification && cts.szB > 0 && cts.u.val > 0) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2678 | is_spec = True; |
| 2679 | } |
dejanj | 0abc419 | 2014-04-04 10:20:03 +0000 | [diff] [blame] | 2680 | if (attr == DW_AT_signature && form == DW_FORM_ref_sig8 |
| 2681 | && cts.szB > 0) { |
| 2682 | have_szB = True; |
| 2683 | typeE.Te.TyStOrUn.szB = 8; |
| 2684 | typeE.Te.TyStOrUn.typeR |
| 2685 | = cook_die_using_form( cc, (UWord)cts.u.val, form ); |
| 2686 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2687 | } |
| 2688 | /* Do we have something that looks sane? */ |
| 2689 | if (is_decl && (!is_spec)) { |
| 2690 | /* It's a DW_AT_declaration. We require the name but |
| 2691 | nothing else. */ |
sewardj | 0088888 | 2012-06-30 20:21:58 +0000 | [diff] [blame] | 2692 | /* JRS 2012-06-28: following discussion w/ tromey, if the the |
| 2693 | type doesn't have name, just make one up, and accept it. |
| 2694 | It might be referred to by other DIEs, so ignoring it |
| 2695 | doesn't seem like a safe option. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2696 | if (typeE.Te.TyStOrUn.name == NULL) |
sewardj | 0088888 | 2012-06-30 20:21:58 +0000 | [diff] [blame] | 2697 | typeE.Te.TyStOrUn.name |
| 2698 | = ML_(dinfo_strdup)( "di.readdwarf3.ptD.struct_type.3", |
| 2699 | "<anon_struct_type>" ); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2700 | typeE.Te.TyStOrUn.complete = False; |
sewardj | b34bb1d | 2009-08-10 18:59:54 +0000 | [diff] [blame] | 2701 | /* JRS 2009 Aug 10: <possible kludge>? */ |
| 2702 | /* Push this tyent on the stack, even though it's incomplete. |
| 2703 | It appears that gcc-4.4 on Fedora 11 will sometimes create |
| 2704 | DW_TAG_member entries for it, and so we need to have a |
| 2705 | plausible parent present in order for that to work. See |
| 2706 | #200029 comments 8 and 9. */ |
| 2707 | typestack_push( cc, parser, td3, &typeE, level ); |
| 2708 | /* </possible kludge> */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2709 | goto acquire_Type; |
| 2710 | } |
| 2711 | if ((!is_decl) /* && (!is_spec) */) { |
| 2712 | /* this is the common, ordinary case */ |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2713 | /* The name can be present, or not */ |
| 2714 | if (!have_szB) { |
| 2715 | /* We must know the size. |
| 2716 | But in Ada, record with discriminants might have no size. |
| 2717 | But in C, VLA in the middle of a struct (gcc extension) |
| 2718 | might have no size. |
| 2719 | Instead, some GNAT dwarf extensions and/or dwarf entries |
| 2720 | allow to calculate the struct size at runtime. |
| 2721 | We cannot do that (yet?) so, the temporary kludge is to use |
| 2722 | a small size. */ |
| 2723 | typeE.Te.TyStOrUn.szB = 1; |
| 2724 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2725 | /* On't stack! */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2726 | typestack_push( cc, parser, td3, &typeE, level ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2727 | goto acquire_Type; |
| 2728 | } |
| 2729 | else { |
| 2730 | /* don't know how to handle any other variants just now */ |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2731 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2732 | } |
| 2733 | } |
| 2734 | |
| 2735 | if (dtag == DW_TAG_member) { |
| 2736 | /* Acquire member entries for both DW_TAG_structure_type and |
| 2737 | DW_TAG_union_type. They differ minorly, in that struct |
| 2738 | members must have a DW_AT_data_member_location expression |
| 2739 | whereas union members must not. */ |
| 2740 | Bool parent_is_struct; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2741 | VG_(memset)( &fieldE, 0, sizeof(fieldE) ); |
| 2742 | fieldE.cuOff = posn; |
| 2743 | fieldE.tag = Te_Field; |
| 2744 | fieldE.Te.Field.typeR = D3_INVALID_CUOFF; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2745 | while (True) { |
| 2746 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 2747 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 2748 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2749 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2750 | if (attr == DW_AT_name && cts.szB < 0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2751 | fieldE.Te.Field.name |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2752 | = ML_(cur_read_strdup)( cts.u.cur, |
| 2753 | "di.readdwarf3.ptD.member.1" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2754 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2755 | if (attr == DW_AT_type && cts.szB > 0) { |
| 2756 | fieldE.Te.Field.typeR |
| 2757 | = cook_die_using_form( cc, (UWord)cts.u.val, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2758 | } |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 2759 | /* There are 2 different cases for DW_AT_data_member_location. |
| 2760 | If it is a constant class attribute, it contains byte offset |
| 2761 | from the beginning of the containing entity. |
| 2762 | Otherwise it is a location expression. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2763 | if (attr == DW_AT_data_member_location && cts.szB > 0) { |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 2764 | fieldE.Te.Field.nLoc = -1; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2765 | fieldE.Te.Field.pos.offset = cts.u.val; |
| 2766 | } |
| 2767 | if (attr == DW_AT_data_member_location && cts.szB <= 0) { |
| 2768 | fieldE.Te.Field.nLoc = (UWord)(-cts.szB); |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 2769 | fieldE.Te.Field.pos.loc |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2770 | = ML_(cur_read_memdup)( cts.u.cur, |
| 2771 | (SizeT)fieldE.Te.Field.nLoc, |
| 2772 | "di.readdwarf3.ptD.member.2" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2773 | } |
| 2774 | } |
| 2775 | /* Do we have a plausible parent? */ |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2776 | if (typestack_is_empty(parser)) goto_bad_DIE; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2777 | vg_assert(ML_(TyEnt__is_type)(&parser->qparentE[parser->sp])); |
| 2778 | vg_assert(parser->qparentE[parser->sp].cuOff != D3_INVALID_CUOFF); |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2779 | if (level != parser->qlevel[parser->sp]+1) goto_bad_DIE; |
| 2780 | if (parser->qparentE[parser->sp].tag != Te_TyStOrUn) goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2781 | /* Do we have something that looks sane? If this a member of a |
| 2782 | struct, we must have a location expression; but if a member |
| 2783 | of a union that is irrelevant (D3 spec sec 5.6.6). We ought |
| 2784 | to reject in the latter case, but some compilers have been |
| 2785 | observed to emit constant-zero expressions. So just ignore |
| 2786 | them. */ |
| 2787 | parent_is_struct |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2788 | = parser->qparentE[parser->sp].Te.TyStOrUn.isStruct; |
| 2789 | if (!fieldE.Te.Field.name) |
| 2790 | fieldE.Te.Field.name |
| 2791 | = ML_(dinfo_strdup)( "di.readdwarf3.ptD.member.3", |
| 2792 | "<anon_field>" ); |
| 2793 | vg_assert(fieldE.Te.Field.name); |
| 2794 | if (fieldE.Te.Field.typeR == D3_INVALID_CUOFF) |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2795 | goto_bad_DIE; |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 2796 | if (fieldE.Te.Field.nLoc) { |
tom | 07de5dd | 2009-08-03 14:39:54 +0000 | [diff] [blame] | 2797 | if (!parent_is_struct) { |
| 2798 | /* If this is a union type, pretend we haven't seen the data |
| 2799 | member location expression, as it is by definition |
| 2800 | redundant (it must be zero). */ |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 2801 | if (fieldE.Te.Field.nLoc > 0) |
| 2802 | ML_(dinfo_free)(fieldE.Te.Field.pos.loc); |
| 2803 | fieldE.Te.Field.pos.loc = NULL; |
tom | 07de5dd | 2009-08-03 14:39:54 +0000 | [diff] [blame] | 2804 | fieldE.Te.Field.nLoc = 0; |
| 2805 | } |
| 2806 | /* Record this child in the parent */ |
| 2807 | fieldE.Te.Field.isStruct = parent_is_struct; |
| 2808 | vg_assert(parser->qparentE[parser->sp].Te.TyStOrUn.fieldRs); |
| 2809 | VG_(addToXA)( parser->qparentE[parser->sp].Te.TyStOrUn.fieldRs, |
| 2810 | &posn ); |
| 2811 | /* And record the child itself */ |
| 2812 | goto acquire_Field; |
| 2813 | } else { |
| 2814 | /* Member with no location - this can happen with static |
| 2815 | const members in C++ code which are compile time constants |
| 2816 | that do no exist in the class. They're not of any interest |
| 2817 | to us so we ignore them. */ |
philippe | d9df0ea | 2012-02-28 20:10:05 +0000 | [diff] [blame] | 2818 | ML_(TyEnt__make_EMPTY)(&fieldE); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2819 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2820 | } |
| 2821 | |
| 2822 | if (dtag == DW_TAG_array_type) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2823 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 2824 | typeE.cuOff = posn; |
| 2825 | typeE.tag = Te_TyArray; |
| 2826 | typeE.Te.TyArray.typeR = D3_INVALID_CUOFF; |
| 2827 | typeE.Te.TyArray.boundRs |
| 2828 | = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.ptD.array_type.1", |
| 2829 | ML_(dinfo_free), |
| 2830 | sizeof(UWord) ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2831 | while (True) { |
| 2832 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 2833 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 2834 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2835 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2836 | if (attr == DW_AT_type && cts.szB > 0) { |
| 2837 | typeE.Te.TyArray.typeR |
| 2838 | = cook_die_using_form( cc, (UWord)cts.u.val, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2839 | } |
| 2840 | } |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2841 | if (typeE.Te.TyArray.typeR == D3_INVALID_CUOFF) |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2842 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2843 | /* On't stack! */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2844 | typestack_push( cc, parser, td3, &typeE, level ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2845 | goto acquire_Type; |
| 2846 | } |
| 2847 | |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 2848 | /* this is a subrange type defining the bounds of an array. */ |
| 2849 | if (dtag == DW_TAG_subrange_type |
| 2850 | && subrange_type_denotes_array_bounds(parser, dtag)) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2851 | Bool have_lower = False; |
| 2852 | Bool have_upper = False; |
| 2853 | Bool have_count = False; |
| 2854 | Long lower = 0; |
| 2855 | Long upper = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2856 | |
| 2857 | switch (parser->language) { |
| 2858 | case 'C': have_lower = True; lower = 0; break; |
| 2859 | case 'F': have_lower = True; lower = 1; break; |
| 2860 | case '?': have_lower = False; break; |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 2861 | case 'A': have_lower = False; break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2862 | default: vg_assert(0); /* assured us by handling of |
| 2863 | DW_TAG_compile_unit in this fn */ |
| 2864 | } |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2865 | |
| 2866 | VG_(memset)( &boundE, 0, sizeof(boundE) ); |
| 2867 | boundE.cuOff = D3_INVALID_CUOFF; |
| 2868 | boundE.tag = Te_Bound; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2869 | while (True) { |
| 2870 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 2871 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 2872 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2873 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2874 | if (attr == DW_AT_lower_bound && cts.szB > 0) { |
| 2875 | lower = (Long)cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2876 | have_lower = True; |
| 2877 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2878 | if (attr == DW_AT_upper_bound && cts.szB > 0) { |
| 2879 | upper = (Long)cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2880 | have_upper = True; |
| 2881 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2882 | if (attr == DW_AT_count && cts.szB > 0) { |
| 2883 | /*count = (Long)cts.u.val;*/ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2884 | have_count = True; |
| 2885 | } |
| 2886 | } |
| 2887 | /* FIXME: potentially skip the rest if no parent present, since |
| 2888 | it could be the case that this subrange type is free-standing |
| 2889 | (not being used to describe the bounds of a containing array |
| 2890 | type) */ |
| 2891 | /* Do we have a plausible parent? */ |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2892 | if (typestack_is_empty(parser)) goto_bad_DIE; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2893 | vg_assert(ML_(TyEnt__is_type)(&parser->qparentE[parser->sp])); |
| 2894 | vg_assert(parser->qparentE[parser->sp].cuOff != D3_INVALID_CUOFF); |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2895 | if (level != parser->qlevel[parser->sp]+1) goto_bad_DIE; |
| 2896 | if (parser->qparentE[parser->sp].tag != Te_TyArray) goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2897 | |
| 2898 | /* Figure out if we have a definite range or not */ |
| 2899 | if (have_lower && have_upper && (!have_count)) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2900 | boundE.Te.Bound.knownL = True; |
| 2901 | boundE.Te.Bound.knownU = True; |
| 2902 | boundE.Te.Bound.boundL = lower; |
| 2903 | boundE.Te.Bound.boundU = upper; |
tom | 7225992 | 2009-08-03 08:50:58 +0000 | [diff] [blame] | 2904 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2905 | else if (have_lower && (!have_upper) && (!have_count)) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2906 | boundE.Te.Bound.knownL = True; |
| 2907 | boundE.Te.Bound.knownU = False; |
| 2908 | boundE.Te.Bound.boundL = lower; |
| 2909 | boundE.Te.Bound.boundU = 0; |
tom | 7225992 | 2009-08-03 08:50:58 +0000 | [diff] [blame] | 2910 | } |
| 2911 | else if ((!have_lower) && have_upper && (!have_count)) { |
| 2912 | boundE.Te.Bound.knownL = False; |
| 2913 | boundE.Te.Bound.knownU = True; |
| 2914 | boundE.Te.Bound.boundL = 0; |
| 2915 | boundE.Te.Bound.boundU = upper; |
| 2916 | } |
| 2917 | else if ((!have_lower) && (!have_upper) && (!have_count)) { |
| 2918 | boundE.Te.Bound.knownL = False; |
| 2919 | boundE.Te.Bound.knownU = False; |
| 2920 | boundE.Te.Bound.boundL = 0; |
| 2921 | boundE.Te.Bound.boundU = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2922 | } else { |
| 2923 | /* FIXME: handle more cases */ |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2924 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2925 | } |
| 2926 | |
| 2927 | /* Record this bound in the parent */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2928 | boundE.cuOff = posn; |
| 2929 | vg_assert(parser->qparentE[parser->sp].Te.TyArray.boundRs); |
| 2930 | VG_(addToXA)( parser->qparentE[parser->sp].Te.TyArray.boundRs, |
sewardj | 471d6b3 | 2012-04-05 07:15:22 +0000 | [diff] [blame] | 2931 | &boundE.cuOff ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2932 | /* And record the child itself */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2933 | goto acquire_Bound; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2934 | } |
| 2935 | |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 2936 | /* typedef or subrange_type other than array bounds. */ |
| 2937 | if (dtag == DW_TAG_typedef |
| 2938 | || (dtag == DW_TAG_subrange_type |
| 2939 | && !subrange_type_denotes_array_bounds(parser, dtag))) { |
| 2940 | /* subrange_type other than array bound is only for Ada. */ |
| 2941 | vg_assert (dtag == DW_TAG_typedef || parser->language == 'A'); |
| 2942 | /* We can pick up a new typedef/subrange_type any time. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2943 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 2944 | typeE.cuOff = D3_INVALID_CUOFF; |
| 2945 | typeE.tag = Te_TyTyDef; |
| 2946 | typeE.Te.TyTyDef.name = NULL; |
| 2947 | typeE.Te.TyTyDef.typeR = D3_INVALID_CUOFF; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2948 | while (True) { |
| 2949 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 2950 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 2951 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2952 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2953 | if (attr == DW_AT_name && cts.szB < 0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2954 | typeE.Te.TyTyDef.name |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2955 | = ML_(cur_read_strdup)( cts.u.cur, |
| 2956 | "di.readdwarf3.ptD.typedef.1" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2957 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2958 | if (attr == DW_AT_type && cts.szB > 0) { |
| 2959 | typeE.Te.TyTyDef.typeR |
| 2960 | = cook_die_using_form( cc, (UWord)cts.u.val, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2961 | } |
| 2962 | } |
mjw | e5cf451 | 2013-11-24 17:19:35 +0000 | [diff] [blame] | 2963 | /* Do we have something that looks sane? |
| 2964 | gcc gnat Ada generates minimal typedef |
| 2965 | such as the below |
| 2966 | <6><91cc>: DW_TAG_typedef |
| 2967 | DW_AT_abstract_ori: <9066> |
| 2968 | g++ for OMP can generate artificial functions that have |
| 2969 | parameters that refer to pointers to unnamed typedefs. |
| 2970 | See https://bugs.kde.org/show_bug.cgi?id=273475 |
| 2971 | So we cannot require a name for a DW_TAG_typedef. |
| 2972 | */ |
| 2973 | goto acquire_Type; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2974 | } |
| 2975 | |
| 2976 | if (dtag == DW_TAG_subroutine_type) { |
| 2977 | /* function type? just record that one fact and ask no |
| 2978 | further questions. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2979 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 2980 | typeE.cuOff = D3_INVALID_CUOFF; |
| 2981 | typeE.tag = Te_TyFn; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2982 | goto acquire_Type; |
| 2983 | } |
| 2984 | |
| 2985 | if (dtag == DW_TAG_volatile_type || dtag == DW_TAG_const_type) { |
| 2986 | Int have_ty = 0; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2987 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 2988 | typeE.cuOff = D3_INVALID_CUOFF; |
| 2989 | typeE.tag = Te_TyQual; |
| 2990 | typeE.Te.TyQual.qual |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2991 | = dtag == DW_TAG_volatile_type ? 'V' : 'C'; |
| 2992 | /* target type defaults to 'void' */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2993 | typeE.Te.TyQual.typeR = D3_FAKEVOID_CUOFF; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2994 | while (True) { |
| 2995 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 2996 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 2997 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2998 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2999 | if (attr == DW_AT_type && cts.szB > 0) { |
| 3000 | typeE.Te.TyQual.typeR |
| 3001 | = cook_die_using_form( cc, (UWord)cts.u.val, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3002 | have_ty++; |
| 3003 | } |
| 3004 | } |
| 3005 | /* gcc sometimes generates DW_TAG_const/volatile_type without |
| 3006 | DW_AT_type and GDB appears to interpret the type as 'const |
| 3007 | void' (resp. 'volatile void'). So just allow it .. */ |
| 3008 | if (have_ty == 1 || have_ty == 0) |
| 3009 | goto acquire_Type; |
| 3010 | else |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3011 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3012 | } |
| 3013 | |
bart | e64c5a9 | 2012-01-16 17:11:07 +0000 | [diff] [blame] | 3014 | /* |
| 3015 | * Treat DW_TAG_unspecified_type as type void. An example of DW_TAG_unspecified_type: |
| 3016 | * |
| 3017 | * $ readelf --debug-dump /usr/lib/debug/usr/lib/libstdc++.so.6.0.16.debug |
| 3018 | * <1><10d4>: Abbrev Number: 53 (DW_TAG_unspecified_type) |
| 3019 | * <10d5> DW_AT_name : (indirect string, offset: 0xdb7): decltype(nullptr) |
| 3020 | */ |
| 3021 | if (dtag == DW_TAG_unspecified_type) { |
| 3022 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 3023 | typeE.cuOff = D3_INVALID_CUOFF; |
| 3024 | typeE.tag = Te_TyQual; |
| 3025 | typeE.Te.TyQual.typeR = D3_FAKEVOID_CUOFF; |
| 3026 | goto acquire_Type; |
| 3027 | } |
| 3028 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3029 | /* else ignore this DIE */ |
| 3030 | return; |
| 3031 | /*NOTREACHED*/ |
| 3032 | |
| 3033 | acquire_Type: |
| 3034 | if (0) VG_(printf)("YYYY Acquire Type\n"); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3035 | vg_assert(ML_(TyEnt__is_type)( &typeE )); |
| 3036 | vg_assert(typeE.cuOff == D3_INVALID_CUOFF || typeE.cuOff == posn); |
| 3037 | typeE.cuOff = posn; |
| 3038 | VG_(addToXA)( tyents, &typeE ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3039 | return; |
| 3040 | /*NOTREACHED*/ |
| 3041 | |
| 3042 | acquire_Atom: |
| 3043 | if (0) VG_(printf)("YYYY Acquire Atom\n"); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3044 | vg_assert(atomE.tag == Te_Atom); |
| 3045 | vg_assert(atomE.cuOff == D3_INVALID_CUOFF || atomE.cuOff == posn); |
| 3046 | atomE.cuOff = posn; |
| 3047 | VG_(addToXA)( tyents, &atomE ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3048 | return; |
| 3049 | /*NOTREACHED*/ |
| 3050 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3051 | acquire_Field: |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3052 | /* For union members, Expr should be absent */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3053 | if (0) VG_(printf)("YYYY Acquire Field\n"); |
| 3054 | vg_assert(fieldE.tag == Te_Field); |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 3055 | vg_assert(fieldE.Te.Field.nLoc <= 0 || fieldE.Te.Field.pos.loc != NULL); |
| 3056 | vg_assert(fieldE.Te.Field.nLoc != 0 || fieldE.Te.Field.pos.loc == NULL); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3057 | if (fieldE.Te.Field.isStruct) { |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 3058 | vg_assert(fieldE.Te.Field.nLoc != 0); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3059 | } else { |
| 3060 | vg_assert(fieldE.Te.Field.nLoc == 0); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3061 | } |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3062 | vg_assert(fieldE.cuOff == D3_INVALID_CUOFF || fieldE.cuOff == posn); |
| 3063 | fieldE.cuOff = posn; |
| 3064 | VG_(addToXA)( tyents, &fieldE ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3065 | return; |
| 3066 | /*NOTREACHED*/ |
| 3067 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3068 | acquire_Bound: |
| 3069 | if (0) VG_(printf)("YYYY Acquire Bound\n"); |
| 3070 | vg_assert(boundE.tag == Te_Bound); |
| 3071 | vg_assert(boundE.cuOff == D3_INVALID_CUOFF || boundE.cuOff == posn); |
| 3072 | boundE.cuOff = posn; |
| 3073 | VG_(addToXA)( tyents, &boundE ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3074 | return; |
| 3075 | /*NOTREACHED*/ |
| 3076 | |
| 3077 | bad_DIE: |
| 3078 | set_position_of_Cursor( c_die, saved_die_c_offset ); |
| 3079 | set_position_of_Cursor( c_abbv, saved_abbv_c_offset ); |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 3080 | posn = uncook_die( cc, posn, &debug_types_flag, &alt_flag ); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3081 | VG_(printf)(" <%d><%lx>: %s", level, posn, ML_(pp_DW_TAG)( dtag ) ); |
| 3082 | if (debug_types_flag) { |
| 3083 | VG_(printf)(" (in .debug_types)"); |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 3084 | } else if (alt_flag) { |
| 3085 | VG_(printf)(" (in alternate .debug_info)"); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3086 | } |
| 3087 | VG_(printf)("\n"); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3088 | while (True) { |
| 3089 | DW_AT attr = (DW_AT) get_ULEB128( c_abbv ); |
| 3090 | DW_FORM form = (DW_FORM)get_ULEB128( c_abbv ); |
| 3091 | if (attr == 0 && form == 0) break; |
| 3092 | VG_(printf)(" %18s: ", ML_(pp_DW_AT)(attr)); |
| 3093 | /* Get the form contents, so as to print them */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3094 | get_Form_contents( &cts, cc, c_die, True, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3095 | VG_(printf)("\t\n"); |
| 3096 | } |
| 3097 | VG_(printf)("\n"); |
| 3098 | cc->barf("parse_type_DIE: confused by the above DIE"); |
| 3099 | /*NOTREACHED*/ |
| 3100 | } |
| 3101 | |
| 3102 | |
| 3103 | /*------------------------------------------------------------*/ |
| 3104 | /*--- ---*/ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3105 | /*--- Compression of type DIE information ---*/ |
| 3106 | /*--- ---*/ |
| 3107 | /*------------------------------------------------------------*/ |
| 3108 | |
| 3109 | static UWord chase_cuOff ( Bool* changed, |
| 3110 | XArray* /* of TyEnt */ ents, |
| 3111 | TyEntIndexCache* ents_cache, |
| 3112 | UWord cuOff ) |
| 3113 | { |
| 3114 | TyEnt* ent; |
| 3115 | ent = ML_(TyEnts__index_by_cuOff)( ents, ents_cache, cuOff ); |
| 3116 | |
| 3117 | if (!ent) { |
| 3118 | VG_(printf)("chase_cuOff: no entry for 0x%05lx\n", cuOff); |
| 3119 | *changed = False; |
| 3120 | return cuOff; |
| 3121 | } |
| 3122 | |
| 3123 | vg_assert(ent->tag != Te_EMPTY); |
| 3124 | if (ent->tag != Te_INDIR) { |
| 3125 | *changed = False; |
| 3126 | return cuOff; |
| 3127 | } else { |
| 3128 | vg_assert(ent->Te.INDIR.indR < cuOff); |
| 3129 | *changed = True; |
| 3130 | return ent->Te.INDIR.indR; |
| 3131 | } |
| 3132 | } |
| 3133 | |
| 3134 | static |
| 3135 | void chase_cuOffs_in_XArray ( Bool* changed, |
| 3136 | XArray* /* of TyEnt */ ents, |
| 3137 | TyEntIndexCache* ents_cache, |
| 3138 | /*MOD*/XArray* /* of UWord */ cuOffs ) |
| 3139 | { |
| 3140 | Bool b2 = False; |
| 3141 | Word i, n = VG_(sizeXA)( cuOffs ); |
| 3142 | for (i = 0; i < n; i++) { |
| 3143 | Bool b = False; |
| 3144 | UWord* p = VG_(indexXA)( cuOffs, i ); |
| 3145 | *p = chase_cuOff( &b, ents, ents_cache, *p ); |
| 3146 | if (b) |
| 3147 | b2 = True; |
| 3148 | } |
| 3149 | *changed = b2; |
| 3150 | } |
| 3151 | |
| 3152 | static Bool TyEnt__subst_R_fields ( XArray* /* of TyEnt */ ents, |
| 3153 | TyEntIndexCache* ents_cache, |
| 3154 | /*MOD*/TyEnt* te ) |
| 3155 | { |
| 3156 | Bool b, changed = False; |
| 3157 | switch (te->tag) { |
| 3158 | case Te_EMPTY: |
| 3159 | break; |
| 3160 | case Te_INDIR: |
| 3161 | te->Te.INDIR.indR |
| 3162 | = chase_cuOff( &b, ents, ents_cache, te->Te.INDIR.indR ); |
| 3163 | if (b) changed = True; |
| 3164 | break; |
| 3165 | case Te_UNKNOWN: |
| 3166 | break; |
| 3167 | case Te_Atom: |
| 3168 | break; |
| 3169 | case Te_Field: |
| 3170 | te->Te.Field.typeR |
| 3171 | = chase_cuOff( &b, ents, ents_cache, te->Te.Field.typeR ); |
| 3172 | if (b) changed = True; |
| 3173 | break; |
| 3174 | case Te_Bound: |
| 3175 | break; |
| 3176 | case Te_TyBase: |
| 3177 | break; |
bart | 0e947cf | 2012-02-01 14:59:14 +0000 | [diff] [blame] | 3178 | case Te_TyPtr: |
| 3179 | case Te_TyRef: |
| 3180 | case Te_TyPtrMbr: |
| 3181 | case Te_TyRvalRef: |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3182 | te->Te.TyPorR.typeR |
| 3183 | = chase_cuOff( &b, ents, ents_cache, te->Te.TyPorR.typeR ); |
| 3184 | if (b) changed = True; |
| 3185 | break; |
| 3186 | case Te_TyTyDef: |
| 3187 | te->Te.TyTyDef.typeR |
| 3188 | = chase_cuOff( &b, ents, ents_cache, te->Te.TyTyDef.typeR ); |
| 3189 | if (b) changed = True; |
| 3190 | break; |
| 3191 | case Te_TyStOrUn: |
| 3192 | chase_cuOffs_in_XArray( &b, ents, ents_cache, te->Te.TyStOrUn.fieldRs ); |
| 3193 | if (b) changed = True; |
| 3194 | break; |
| 3195 | case Te_TyEnum: |
| 3196 | chase_cuOffs_in_XArray( &b, ents, ents_cache, te->Te.TyEnum.atomRs ); |
| 3197 | if (b) changed = True; |
| 3198 | break; |
| 3199 | case Te_TyArray: |
| 3200 | te->Te.TyArray.typeR |
| 3201 | = chase_cuOff( &b, ents, ents_cache, te->Te.TyArray.typeR ); |
| 3202 | if (b) changed = True; |
| 3203 | chase_cuOffs_in_XArray( &b, ents, ents_cache, te->Te.TyArray.boundRs ); |
| 3204 | if (b) changed = True; |
| 3205 | break; |
| 3206 | case Te_TyFn: |
| 3207 | break; |
| 3208 | case Te_TyQual: |
| 3209 | te->Te.TyQual.typeR |
| 3210 | = chase_cuOff( &b, ents, ents_cache, te->Te.TyQual.typeR ); |
| 3211 | if (b) changed = True; |
| 3212 | break; |
| 3213 | case Te_TyVoid: |
| 3214 | break; |
| 3215 | default: |
| 3216 | ML_(pp_TyEnt)(te); |
| 3217 | vg_assert(0); |
| 3218 | } |
| 3219 | return changed; |
| 3220 | } |
| 3221 | |
| 3222 | /* Make a pass over 'ents'. For each tyent, inspect the target of any |
| 3223 | 'R' or 'Rs' fields (those which refer to other tyents), and replace |
| 3224 | any which point to INDIR nodes with the target of the indirection |
| 3225 | (which should not itself be an indirection). In summary, this |
| 3226 | routine shorts out all references to indirection nodes. */ |
| 3227 | static |
| 3228 | Word dedup_types_substitution_pass ( /*MOD*/XArray* /* of TyEnt */ ents, |
| 3229 | TyEntIndexCache* ents_cache ) |
| 3230 | { |
| 3231 | Word i, n, nChanged = 0; |
| 3232 | Bool b; |
| 3233 | n = VG_(sizeXA)( ents ); |
| 3234 | for (i = 0; i < n; i++) { |
| 3235 | TyEnt* ent = VG_(indexXA)( ents, i ); |
| 3236 | vg_assert(ent->tag != Te_EMPTY); |
| 3237 | /* We have to substitute everything, even indirections, so as to |
| 3238 | ensure that chains of indirections don't build up. */ |
| 3239 | b = TyEnt__subst_R_fields( ents, ents_cache, ent ); |
| 3240 | if (b) |
| 3241 | nChanged++; |
| 3242 | } |
| 3243 | |
| 3244 | return nChanged; |
| 3245 | } |
| 3246 | |
| 3247 | |
| 3248 | /* Make a pass over 'ents', building a dictionary of TyEnts as we go. |
| 3249 | Look up each new tyent in the dictionary in turn. If it is already |
| 3250 | in the dictionary, replace this tyent with an indirection to the |
| 3251 | existing one, and delete any malloc'd stuff hanging off this one. |
| 3252 | In summary, this routine commons up all tyents that are identical |
| 3253 | as defined by TyEnt__cmp_by_all_except_cuOff. */ |
| 3254 | static |
| 3255 | Word dedup_types_commoning_pass ( /*MOD*/XArray* /* of TyEnt */ ents ) |
| 3256 | { |
| 3257 | Word n, i, nDeleted; |
| 3258 | WordFM* dict; /* TyEnt* -> void */ |
| 3259 | TyEnt* ent; |
| 3260 | UWord keyW, valW; |
| 3261 | |
| 3262 | dict = VG_(newFM)( |
| 3263 | ML_(dinfo_zalloc), "di.readdwarf3.dtcp.1", |
| 3264 | ML_(dinfo_free), |
| 3265 | (Word(*)(UWord,UWord)) ML_(TyEnt__cmp_by_all_except_cuOff) |
| 3266 | ); |
| 3267 | |
| 3268 | nDeleted = 0; |
| 3269 | n = VG_(sizeXA)( ents ); |
| 3270 | for (i = 0; i < n; i++) { |
| 3271 | ent = VG_(indexXA)( ents, i ); |
| 3272 | vg_assert(ent->tag != Te_EMPTY); |
| 3273 | |
| 3274 | /* Ignore indirections, although check that they are |
| 3275 | not forming a cycle. */ |
| 3276 | if (ent->tag == Te_INDIR) { |
| 3277 | vg_assert(ent->Te.INDIR.indR < ent->cuOff); |
| 3278 | continue; |
| 3279 | } |
| 3280 | |
| 3281 | keyW = valW = 0; |
| 3282 | if (VG_(lookupFM)( dict, &keyW, &valW, (UWord)ent )) { |
| 3283 | /* it's already in the dictionary. */ |
| 3284 | TyEnt* old = (TyEnt*)keyW; |
| 3285 | vg_assert(valW == 0); |
| 3286 | vg_assert(old != ent); |
| 3287 | vg_assert(old->tag != Te_INDIR); |
| 3288 | /* since we are traversing the array in increasing order of |
| 3289 | cuOff: */ |
| 3290 | vg_assert(old->cuOff < ent->cuOff); |
| 3291 | /* So anyway, dump this entry and replace it with an |
| 3292 | indirection to the one in the dictionary. Note that the |
| 3293 | assertion above guarantees that we cannot create cycles of |
| 3294 | indirections, since we are always creating an indirection |
| 3295 | to a tyent with a cuOff lower than this one. */ |
| 3296 | ML_(TyEnt__make_EMPTY)( ent ); |
| 3297 | ent->tag = Te_INDIR; |
| 3298 | ent->Te.INDIR.indR = old->cuOff; |
| 3299 | nDeleted++; |
| 3300 | } else { |
| 3301 | /* not in dictionary; add it and keep going. */ |
| 3302 | VG_(addToFM)( dict, (UWord)ent, 0 ); |
| 3303 | } |
| 3304 | } |
| 3305 | |
| 3306 | VG_(deleteFM)( dict, NULL, NULL ); |
| 3307 | |
| 3308 | return nDeleted; |
| 3309 | } |
| 3310 | |
| 3311 | |
| 3312 | static |
| 3313 | void dedup_types ( Bool td3, |
| 3314 | /*MOD*/XArray* /* of TyEnt */ ents, |
| 3315 | TyEntIndexCache* ents_cache ) |
| 3316 | { |
| 3317 | Word m, n, i, nDel, nSubst, nThresh; |
| 3318 | if (0) td3 = True; |
| 3319 | |
| 3320 | n = VG_(sizeXA)( ents ); |
| 3321 | |
| 3322 | /* If a commoning pass and a substitution pass both make fewer than |
| 3323 | this many changes, just stop. It's pointless to burn up CPU |
| 3324 | time trying to compress the last 1% or so out of the array. */ |
| 3325 | nThresh = n / 200; |
| 3326 | |
| 3327 | /* First we must sort .ents by its .cuOff fields, so we |
| 3328 | can index into it. */ |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 3329 | VG_(setCmpFnXA)( ents, (XACmpFn_t) ML_(TyEnt__cmp_by_cuOff_only) ); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3330 | VG_(sortXA)( ents ); |
| 3331 | |
| 3332 | /* Now repeatedly do commoning and substitution passes over |
| 3333 | the array, until there are no more changes. */ |
| 3334 | do { |
| 3335 | nDel = dedup_types_commoning_pass ( ents ); |
| 3336 | nSubst = dedup_types_substitution_pass ( ents, ents_cache ); |
| 3337 | vg_assert(nDel >= 0 && nSubst >= 0); |
| 3338 | TRACE_D3(" %ld deletions, %ld substitutions\n", nDel, nSubst); |
| 3339 | } while (nDel > nThresh || nSubst > nThresh); |
| 3340 | |
| 3341 | /* Sanity check: all INDIR nodes should point at a non-INDIR thing. |
| 3342 | In fact this should be true at the end of every loop iteration |
| 3343 | above (a commoning pass followed by a substitution pass), but |
| 3344 | checking it on every iteration is excessively expensive. Note, |
| 3345 | this loop also computes 'm' for the stats printing below it. */ |
| 3346 | m = 0; |
| 3347 | n = VG_(sizeXA)( ents ); |
| 3348 | for (i = 0; i < n; i++) { |
| 3349 | TyEnt *ent, *ind; |
| 3350 | ent = VG_(indexXA)( ents, i ); |
| 3351 | if (ent->tag != Te_INDIR) continue; |
| 3352 | m++; |
| 3353 | ind = ML_(TyEnts__index_by_cuOff)( ents, ents_cache, |
| 3354 | ent->Te.INDIR.indR ); |
| 3355 | vg_assert(ind); |
| 3356 | vg_assert(ind->tag != Te_INDIR); |
| 3357 | } |
| 3358 | |
| 3359 | TRACE_D3("Overall: %ld before, %ld after\n", n, n-m); |
| 3360 | } |
| 3361 | |
| 3362 | |
| 3363 | /*------------------------------------------------------------*/ |
| 3364 | /*--- ---*/ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3365 | /*--- Resolution of references to type DIEs ---*/ |
| 3366 | /*--- ---*/ |
| 3367 | /*------------------------------------------------------------*/ |
| 3368 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3369 | /* Make a pass through the (temporary) variables array. Examine the |
| 3370 | type of each variable, check is it found, and chase any Te_INDIRs. |
| 3371 | Postcondition is: each variable has a typeR field that refers to a |
| 3372 | valid type in tyents, or a Te_UNKNOWN, and is certainly guaranteed |
| 3373 | not to refer to a Te_INDIR. (This is so that we can throw all the |
| 3374 | Te_INDIRs away later). */ |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 3375 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3376 | __attribute__((noinline)) |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3377 | static void resolve_variable_types ( |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 3378 | void (*barf)( const HChar* ) __attribute__((noreturn)), |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3379 | /*R-O*/XArray* /* of TyEnt */ ents, |
| 3380 | /*MOD*/TyEntIndexCache* ents_cache, |
| 3381 | /*MOD*/XArray* /* of TempVar* */ vars |
| 3382 | ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3383 | { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3384 | Word i, n; |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 3385 | n = VG_(sizeXA)( vars ); |
| 3386 | for (i = 0; i < n; i++) { |
| 3387 | TempVar* var = *(TempVar**)VG_(indexXA)( vars, i ); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3388 | /* This is the stated type of the variable. But it might be |
| 3389 | an indirection, so be careful. */ |
| 3390 | TyEnt* ent = ML_(TyEnts__index_by_cuOff)( ents, ents_cache, |
| 3391 | var->typeR ); |
| 3392 | if (ent && ent->tag == Te_INDIR) { |
| 3393 | ent = ML_(TyEnts__index_by_cuOff)( ents, ents_cache, |
| 3394 | ent->Te.INDIR.indR ); |
| 3395 | vg_assert(ent); |
| 3396 | vg_assert(ent->tag != Te_INDIR); |
| 3397 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3398 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3399 | /* Deal first with "normal" cases */ |
| 3400 | if (ent && ML_(TyEnt__is_type)(ent)) { |
| 3401 | var->typeR = ent->cuOff; |
| 3402 | continue; |
| 3403 | } |
| 3404 | |
| 3405 | /* If there's no ent, it probably we did not manage to read a |
| 3406 | type at the cuOffset which is stated as being this variable's |
| 3407 | type. Maybe a deficiency in parse_type_DIE. Complain. */ |
| 3408 | if (ent == NULL) { |
| 3409 | VG_(printf)("\n: Invalid cuOff = 0x%05lx\n", var->typeR ); |
| 3410 | barf("resolve_variable_types: " |
| 3411 | "cuOff does not refer to a known type"); |
| 3412 | } |
| 3413 | vg_assert(ent); |
| 3414 | /* If ent has any other tag, something bad happened, along the |
| 3415 | lines of var->typeR not referring to a type at all. */ |
| 3416 | vg_assert(ent->tag == Te_UNKNOWN); |
| 3417 | /* Just accept it; the type will be useless, but at least keep |
| 3418 | going. */ |
| 3419 | var->typeR = ent->cuOff; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3420 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3421 | } |
| 3422 | |
| 3423 | |
| 3424 | /*------------------------------------------------------------*/ |
| 3425 | /*--- ---*/ |
| 3426 | /*--- Parsing of Compilation Units ---*/ |
| 3427 | /*--- ---*/ |
| 3428 | /*------------------------------------------------------------*/ |
| 3429 | |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 3430 | static Int cmp_TempVar_by_dioff ( const void* v1, const void* v2 ) { |
florian | 3e79863 | 2012-11-24 19:41:54 +0000 | [diff] [blame] | 3431 | const TempVar* t1 = *(const TempVar *const *)v1; |
| 3432 | const TempVar* t2 = *(const TempVar *const *)v2; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3433 | if (t1->dioff < t2->dioff) return -1; |
| 3434 | if (t1->dioff > t2->dioff) return 1; |
| 3435 | return 0; |
| 3436 | } |
| 3437 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3438 | static void read_DIE ( |
| 3439 | /*MOD*/WordFM* /* of (XArray* of AddrRange, void) */ rangestree, |
| 3440 | /*MOD*/XArray* /* of TyEnt */ tyents, |
| 3441 | /*MOD*/XArray* /* of TempVar* */ tempvars, |
| 3442 | /*MOD*/XArray* /* of GExpr* */ gexprs, |
| 3443 | /*MOD*/D3TypeParser* typarser, |
| 3444 | /*MOD*/D3VarParser* varparser, |
| 3445 | Cursor* c, Bool td3, CUConst* cc, Int level |
| 3446 | ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3447 | { |
| 3448 | Cursor abbv; |
| 3449 | ULong atag, abbv_code; |
| 3450 | UWord posn; |
| 3451 | UInt has_children; |
| 3452 | UWord start_die_c_offset, start_abbv_c_offset; |
| 3453 | UWord after_die_c_offset, after_abbv_c_offset; |
| 3454 | |
| 3455 | /* --- Deal with this DIE --- */ |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3456 | posn = cook_die( cc, get_position_of_Cursor( c ) ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3457 | abbv_code = get_ULEB128( c ); |
| 3458 | set_abbv_Cursor( &abbv, td3, cc, abbv_code ); |
| 3459 | atag = get_ULEB128( &abbv ); |
| 3460 | TRACE_D3("\n"); |
| 3461 | TRACE_D3(" <%d><%lx>: Abbrev Number: %llu (%s)\n", |
| 3462 | level, posn, abbv_code, ML_(pp_DW_TAG)( atag ) ); |
| 3463 | |
| 3464 | if (atag == 0) |
| 3465 | cc->barf("read_DIE: invalid zero tag on DIE"); |
| 3466 | |
| 3467 | has_children = get_UChar( &abbv ); |
| 3468 | if (has_children != DW_children_no && has_children != DW_children_yes) |
| 3469 | cc->barf("read_DIE: invalid has_children value"); |
| 3470 | |
| 3471 | /* We're set up to look at the fields of this DIE. Hand it off to |
| 3472 | any parser(s) that want to see it. Since they will in general |
| 3473 | advance both the DIE and abbrev cursors, remember their current |
| 3474 | settings so that we can then back up and do one final pass over |
| 3475 | the DIE, to print out its contents. */ |
| 3476 | |
| 3477 | start_die_c_offset = get_position_of_Cursor( c ); |
| 3478 | start_abbv_c_offset = get_position_of_Cursor( &abbv ); |
| 3479 | |
| 3480 | while (True) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3481 | FormContents cts; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3482 | ULong at_name = get_ULEB128( &abbv ); |
| 3483 | ULong at_form = get_ULEB128( &abbv ); |
| 3484 | if (at_name == 0 && at_form == 0) break; |
| 3485 | TRACE_D3(" %18s: ", ML_(pp_DW_AT)(at_name)); |
| 3486 | /* Get the form contents, but ignore them; the only purpose is |
| 3487 | to print them, if td3 is True */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3488 | get_Form_contents( &cts, cc, c, td3, (DW_FORM)at_form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3489 | TRACE_D3("\t"); |
| 3490 | TRACE_D3("\n"); |
| 3491 | } |
| 3492 | |
| 3493 | after_die_c_offset = get_position_of_Cursor( c ); |
| 3494 | after_abbv_c_offset = get_position_of_Cursor( &abbv ); |
| 3495 | |
| 3496 | set_position_of_Cursor( c, start_die_c_offset ); |
| 3497 | set_position_of_Cursor( &abbv, start_abbv_c_offset ); |
| 3498 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3499 | parse_type_DIE( tyents, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3500 | typarser, |
| 3501 | (DW_TAG)atag, |
| 3502 | posn, |
| 3503 | level, |
| 3504 | c, /* DIE cursor */ |
| 3505 | &abbv, /* abbrev cursor */ |
| 3506 | cc, |
| 3507 | td3 ); |
| 3508 | |
| 3509 | set_position_of_Cursor( c, start_die_c_offset ); |
| 3510 | set_position_of_Cursor( &abbv, start_abbv_c_offset ); |
| 3511 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3512 | parse_var_DIE( rangestree, |
| 3513 | tempvars, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3514 | gexprs, |
| 3515 | varparser, |
| 3516 | (DW_TAG)atag, |
| 3517 | posn, |
| 3518 | level, |
| 3519 | c, /* DIE cursor */ |
| 3520 | &abbv, /* abbrev cursor */ |
| 3521 | cc, |
| 3522 | td3 ); |
| 3523 | |
| 3524 | set_position_of_Cursor( c, after_die_c_offset ); |
| 3525 | set_position_of_Cursor( &abbv, after_abbv_c_offset ); |
| 3526 | |
| 3527 | /* --- Now recurse into its children, if any --- */ |
| 3528 | if (has_children == DW_children_yes) { |
| 3529 | if (0) TRACE_D3("BEGIN children of level %d\n", level); |
| 3530 | while (True) { |
| 3531 | atag = peek_ULEB128( c ); |
| 3532 | if (atag == 0) break; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3533 | read_DIE( rangestree, tyents, tempvars, gexprs, |
| 3534 | typarser, varparser, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3535 | c, td3, cc, level+1 ); |
| 3536 | } |
| 3537 | /* Now we need to eat the terminating zero */ |
| 3538 | atag = get_ULEB128( c ); |
| 3539 | vg_assert(atag == 0); |
| 3540 | if (0) TRACE_D3("END children of level %d\n", level); |
| 3541 | } |
| 3542 | |
| 3543 | } |
| 3544 | |
| 3545 | |
| 3546 | static |
| 3547 | void new_dwarf3_reader_wrk ( |
| 3548 | struct _DebugInfo* di, |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 3549 | __attribute__((noreturn)) void (*barf)( const HChar* ), |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3550 | DiSlice escn_debug_info, DiSlice escn_debug_types, |
| 3551 | DiSlice escn_debug_abbv, DiSlice escn_debug_line, |
| 3552 | DiSlice escn_debug_str, DiSlice escn_debug_ranges, |
| 3553 | DiSlice escn_debug_loc, DiSlice escn_debug_info_alt, |
| 3554 | DiSlice escn_debug_abbv_alt, DiSlice escn_debug_line_alt, |
| 3555 | DiSlice escn_debug_str_alt |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3556 | ) |
| 3557 | { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3558 | XArray* /* of TyEnt */ tyents; |
| 3559 | XArray* /* of TyEnt */ tyents_to_keep; |
| 3560 | XArray* /* of GExpr* */ gexprs; |
| 3561 | XArray* /* of TempVar* */ tempvars; |
| 3562 | WordFM* /* of (XArray* of AddrRange, void) */ rangestree; |
| 3563 | TyEntIndexCache* tyents_cache = NULL; |
| 3564 | TyEntIndexCache* tyents_to_keep_cache = NULL; |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 3565 | TempVar *varp, *varp2; |
| 3566 | GExpr* gexpr; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3567 | Cursor abbv; /* for showing .debug_abbrev */ |
| 3568 | Cursor info; /* primary cursor for parsing .debug_info */ |
| 3569 | Cursor ranges; /* for showing .debug_ranges */ |
| 3570 | D3TypeParser typarser; |
| 3571 | D3VarParser varparser; |
| 3572 | Addr dr_base; |
| 3573 | UWord dr_offset; |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 3574 | Word i, j, n; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3575 | Bool td3 = di->trace_symtab; |
| 3576 | XArray* /* of TempVar* */ dioff_lookup_tab; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3577 | Int pass; |
| 3578 | VgHashTable signature_types; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3579 | #if 0 |
| 3580 | /* This doesn't work properly because it assumes all entries are |
| 3581 | packed end to end, with no holes. But that doesn't always |
| 3582 | appear to be the case, so it loses sync. And the D3 spec |
| 3583 | doesn't appear to require a no-hole situation either. */ |
| 3584 | /* Display .debug_loc */ |
| 3585 | Addr dl_base; |
| 3586 | UWord dl_offset; |
| 3587 | Cursor loc; /* for showing .debug_loc */ |
| 3588 | TRACE_SYMTAB("\n"); |
| 3589 | TRACE_SYMTAB("\n------ The contents of .debug_loc ------\n"); |
| 3590 | TRACE_SYMTAB(" Offset Begin End Expression\n"); |
| 3591 | init_Cursor( &loc, debug_loc_img, |
| 3592 | debug_loc_sz, 0, barf, |
| 3593 | "Overrun whilst reading .debug_loc section(1)" ); |
| 3594 | dl_base = 0; |
| 3595 | dl_offset = 0; |
| 3596 | while (True) { |
| 3597 | UWord w1, w2; |
| 3598 | UWord len; |
| 3599 | if (is_at_end_Cursor( &loc )) |
| 3600 | break; |
| 3601 | |
| 3602 | /* Read a (host-)word pair. This is something of a hack since |
| 3603 | the word size to read is really dictated by the ELF file; |
| 3604 | however, we assume we're reading a file with the same |
| 3605 | word-sizeness as the host. Reasonably enough. */ |
| 3606 | w1 = get_UWord( &loc ); |
| 3607 | w2 = get_UWord( &loc ); |
| 3608 | |
| 3609 | if (w1 == 0 && w2 == 0) { |
| 3610 | /* end of list. reset 'base' */ |
| 3611 | TRACE_D3(" %08lx <End of list>\n", dl_offset); |
| 3612 | dl_base = 0; |
| 3613 | dl_offset = get_position_of_Cursor( &loc ); |
| 3614 | continue; |
| 3615 | } |
| 3616 | |
| 3617 | if (w1 == -1UL) { |
| 3618 | /* new value for 'base' */ |
| 3619 | TRACE_D3(" %08lx %16lx %08lx (base address)\n", |
| 3620 | dl_offset, w1, w2); |
| 3621 | dl_base = w2; |
| 3622 | continue; |
| 3623 | } |
| 3624 | |
| 3625 | /* else a location expression follows */ |
| 3626 | TRACE_D3(" %08lx %08lx %08lx ", |
| 3627 | dl_offset, w1 + dl_base, w2 + dl_base); |
| 3628 | len = (UWord)get_UShort( &loc ); |
| 3629 | while (len > 0) { |
| 3630 | UChar byte = get_UChar( &loc ); |
| 3631 | TRACE_D3("%02x", (UInt)byte); |
| 3632 | len--; |
| 3633 | } |
| 3634 | TRACE_SYMTAB("\n"); |
| 3635 | } |
| 3636 | #endif |
| 3637 | |
| 3638 | /* Display .debug_ranges */ |
| 3639 | TRACE_SYMTAB("\n"); |
| 3640 | TRACE_SYMTAB("\n------ The contents of .debug_ranges ------\n"); |
| 3641 | TRACE_SYMTAB(" Offset Begin End\n"); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3642 | if (ML_(sli_is_valid)(escn_debug_ranges)) { |
| 3643 | init_Cursor( &ranges, escn_debug_ranges, 0, barf, |
| 3644 | "Overrun whilst reading .debug_ranges section(1)" ); |
| 3645 | dr_base = 0; |
| 3646 | dr_offset = 0; |
| 3647 | while (True) { |
| 3648 | UWord w1, w2; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3649 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3650 | if (is_at_end_Cursor( &ranges )) |
| 3651 | break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3652 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3653 | /* Read a (host-)word pair. This is something of a hack since |
| 3654 | the word size to read is really dictated by the ELF file; |
| 3655 | however, we assume we're reading a file with the same |
| 3656 | word-sizeness as the host. Reasonably enough. */ |
| 3657 | w1 = get_UWord( &ranges ); |
| 3658 | w2 = get_UWord( &ranges ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3659 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3660 | if (w1 == 0 && w2 == 0) { |
| 3661 | /* end of list. reset 'base' */ |
| 3662 | TRACE_D3(" %08lx <End of list>\n", dr_offset); |
| 3663 | dr_base = 0; |
| 3664 | dr_offset = get_position_of_Cursor( &ranges ); |
| 3665 | continue; |
| 3666 | } |
| 3667 | |
| 3668 | if (w1 == -1UL) { |
| 3669 | /* new value for 'base' */ |
| 3670 | TRACE_D3(" %08lx %16lx %08lx (base address)\n", |
| 3671 | dr_offset, w1, w2); |
| 3672 | dr_base = w2; |
| 3673 | continue; |
| 3674 | } |
| 3675 | |
| 3676 | /* else a range [w1+base, w2+base) is denoted */ |
| 3677 | TRACE_D3(" %08lx %08lx %08lx\n", |
| 3678 | dr_offset, w1 + dr_base, w2 + dr_base); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3679 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3680 | } |
| 3681 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3682 | /* Display .debug_abbrev */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3683 | TRACE_SYMTAB("\n"); |
| 3684 | TRACE_SYMTAB("\n------ The contents of .debug_abbrev ------\n"); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3685 | if (ML_(sli_is_valid)(escn_debug_abbv)) { |
| 3686 | init_Cursor( &abbv, escn_debug_abbv, 0, barf, |
| 3687 | "Overrun whilst reading .debug_abbrev section" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3688 | while (True) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3689 | if (is_at_end_Cursor( &abbv )) |
| 3690 | break; |
| 3691 | /* Read one abbreviation table */ |
| 3692 | TRACE_D3(" Number TAG\n"); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3693 | while (True) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3694 | ULong atag; |
| 3695 | UInt has_children; |
| 3696 | ULong acode = get_ULEB128( &abbv ); |
| 3697 | if (acode == 0) break; /* end of the table */ |
| 3698 | atag = get_ULEB128( &abbv ); |
| 3699 | has_children = get_UChar( &abbv ); |
| 3700 | TRACE_D3(" %llu %s [%s]\n", |
| 3701 | acode, ML_(pp_DW_TAG)(atag), |
| 3702 | ML_(pp_DW_children)(has_children)); |
| 3703 | while (True) { |
| 3704 | ULong at_name = get_ULEB128( &abbv ); |
| 3705 | ULong at_form = get_ULEB128( &abbv ); |
| 3706 | if (at_name == 0 && at_form == 0) break; |
| 3707 | TRACE_D3(" %18s %s\n", |
| 3708 | ML_(pp_DW_AT)(at_name), ML_(pp_DW_FORM)(at_form)); |
| 3709 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3710 | } |
| 3711 | } |
| 3712 | } |
| 3713 | TRACE_SYMTAB("\n"); |
| 3714 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3715 | /* We'll park the harvested type information in here. Also create |
| 3716 | a fake "void" entry with offset D3_FAKEVOID_CUOFF, so we always |
| 3717 | have at least one type entry to refer to. D3_FAKEVOID_CUOFF is |
| 3718 | huge and presumably will not occur in any valid DWARF3 file -- |
| 3719 | it would need to have a .debug_info section 4GB long for that to |
| 3720 | happen. These type entries end up in the DebugInfo. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3721 | tyents = VG_(newXA)( ML_(dinfo_zalloc), |
| 3722 | "di.readdwarf3.ndrw.1 (TyEnt temp array)", |
| 3723 | ML_(dinfo_free), sizeof(TyEnt) ); |
| 3724 | { TyEnt tyent; |
| 3725 | VG_(memset)(&tyent, 0, sizeof(tyent)); |
| 3726 | tyent.tag = Te_TyVoid; |
| 3727 | tyent.cuOff = D3_FAKEVOID_CUOFF; |
| 3728 | tyent.Te.TyVoid.isFake = True; |
| 3729 | VG_(addToXA)( tyents, &tyent ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3730 | } |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3731 | { TyEnt tyent; |
| 3732 | VG_(memset)(&tyent, 0, sizeof(tyent)); |
| 3733 | tyent.tag = Te_UNKNOWN; |
| 3734 | tyent.cuOff = D3_INVALID_CUOFF; |
| 3735 | VG_(addToXA)( tyents, &tyent ); |
| 3736 | } |
| 3737 | |
| 3738 | /* This is a tree used to unique-ify the range lists that are |
| 3739 | manufactured by parse_var_DIE. References to the keys in the |
| 3740 | tree wind up in .rngMany fields in TempVars. We'll need to |
| 3741 | delete this tree, and the XArrays attached to it, at the end of |
| 3742 | this function. */ |
| 3743 | rangestree = VG_(newFM)( ML_(dinfo_zalloc), |
| 3744 | "di.readdwarf3.ndrw.2 (rangestree)", |
| 3745 | ML_(dinfo_free), |
| 3746 | (Word(*)(UWord,UWord))cmp__XArrays_of_AddrRange ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3747 | |
| 3748 | /* List of variables we're accumulating. These don't end up in the |
| 3749 | DebugInfo; instead their contents are handed to ML_(addVar) and |
| 3750 | the list elements are then deleted. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3751 | tempvars = VG_(newXA)( ML_(dinfo_zalloc), |
| 3752 | "di.readdwarf3.ndrw.3 (TempVar*s array)", |
| 3753 | ML_(dinfo_free), |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 3754 | sizeof(TempVar*) ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3755 | |
| 3756 | /* List of GExprs we're accumulating. These wind up in the |
| 3757 | DebugInfo. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3758 | gexprs = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.ndrw.4", |
| 3759 | ML_(dinfo_free), sizeof(GExpr*) ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3760 | |
| 3761 | /* We need a D3TypeParser to keep track of partially constructed |
| 3762 | types. It'll be discarded as soon as we've completed the CU, |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3763 | since the resulting information is tipped in to 'tyents' as it |
| 3764 | is generated. */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3765 | VG_(memset)( &typarser, 0, sizeof(typarser) ); |
| 3766 | typarser.sp = -1; |
| 3767 | typarser.language = '?'; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3768 | for (i = 0; i < N_D3_TYPE_STACK; i++) { |
| 3769 | typarser.qparentE[i].tag = Te_EMPTY; |
| 3770 | typarser.qparentE[i].cuOff = D3_INVALID_CUOFF; |
| 3771 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3772 | |
| 3773 | VG_(memset)( &varparser, 0, sizeof(varparser) ); |
| 3774 | varparser.sp = -1; |
| 3775 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3776 | signature_types = VG_(HT_construct) ("signature_types"); |
| 3777 | |
| 3778 | /* Do an initial pass to scan the .debug_types section, if any, and |
| 3779 | fill in the signatured types hash table. This lets us handle |
| 3780 | mapping from a type signature to a (cooked) DIE offset directly |
| 3781 | in get_Form_contents. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3782 | if (ML_(sli_is_valid)(escn_debug_types)) { |
| 3783 | init_Cursor( &info, escn_debug_types, 0, barf, |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3784 | "Overrun whilst reading .debug_types section" ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3785 | TRACE_D3("\n------ Collecting signatures from " |
| 3786 | ".debug_types section ------\n"); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3787 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3788 | while (True) { |
| 3789 | UWord cu_start_offset, cu_offset_now; |
| 3790 | CUConst cc; |
| 3791 | |
| 3792 | cu_start_offset = get_position_of_Cursor( &info ); |
| 3793 | TRACE_D3("\n"); |
| 3794 | TRACE_D3(" Compilation Unit @ offset 0x%lx:\n", cu_start_offset); |
| 3795 | /* parse_CU_header initialises the CU's set_abbv_Cursor cache |
| 3796 | (saC_cache) */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3797 | parse_CU_Header( &cc, td3, &info, escn_debug_abbv, True, False ); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3798 | |
| 3799 | /* Needed by cook_die. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3800 | cc.types_cuOff_bias = escn_debug_info.szB; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3801 | |
| 3802 | record_signatured_type( signature_types, cc.type_signature, |
| 3803 | cook_die( &cc, cc.type_offset )); |
| 3804 | |
| 3805 | /* Until proven otherwise we assume we don't need the icc9 |
| 3806 | workaround in this case; see the DIE-reading loop below |
| 3807 | for details. */ |
| 3808 | cu_offset_now = (cu_start_offset + cc.unit_length |
| 3809 | + (cc.is_dw64 ? 12 : 4)); |
| 3810 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3811 | if (cu_offset_now >= escn_debug_types.szB) |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3812 | break; |
| 3813 | |
| 3814 | set_position_of_Cursor ( &info, cu_offset_now ); |
| 3815 | } |
| 3816 | } |
| 3817 | |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 3818 | /* Perform three DIE-reading passes. The first pass reads DIEs from |
| 3819 | alternate .debug_info (if any), the second pass reads DIEs from |
| 3820 | .debug_info, and the third pass reads DIEs from .debug_types. |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3821 | Moving the body of this loop into a separate function would |
| 3822 | require a large number of arguments to be passed in, so it is |
| 3823 | kept inline instead. */ |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 3824 | for (pass = 0; pass < 3; ++pass) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3825 | ULong section_size; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3826 | |
| 3827 | if (pass == 0) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3828 | if (!ML_(sli_is_valid)(escn_debug_info_alt)) |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 3829 | continue; |
| 3830 | /* Now loop over the Compilation Units listed in the alternate |
| 3831 | .debug_info section (see D3SPEC sec 7.5) paras 1 and 2. |
| 3832 | Each compilation unit contains a Compilation Unit Header |
| 3833 | followed by precisely one DW_TAG_compile_unit or |
| 3834 | DW_TAG_partial_unit DIE. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3835 | init_Cursor( &info, escn_debug_info_alt, 0, barf, |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 3836 | "Overrun whilst reading alternate .debug_info section" ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3837 | section_size = escn_debug_info_alt.szB; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 3838 | |
| 3839 | TRACE_D3("\n------ Parsing alternate .debug_info section ------\n"); |
| 3840 | } else if (pass == 1) { |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3841 | /* Now loop over the Compilation Units listed in the .debug_info |
| 3842 | section (see D3SPEC sec 7.5) paras 1 and 2. Each compilation |
| 3843 | unit contains a Compilation Unit Header followed by precisely |
| 3844 | one DW_TAG_compile_unit or DW_TAG_partial_unit DIE. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3845 | init_Cursor( &info, escn_debug_info, 0, barf, |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3846 | "Overrun whilst reading .debug_info section" ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3847 | section_size = escn_debug_info.szB; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3848 | |
| 3849 | TRACE_D3("\n------ Parsing .debug_info section ------\n"); |
| 3850 | } else { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3851 | if (!ML_(sli_is_valid)(escn_debug_types)) |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3852 | continue; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3853 | init_Cursor( &info, escn_debug_types, 0, barf, |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3854 | "Overrun whilst reading .debug_types section" ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3855 | section_size = escn_debug_types.szB; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3856 | |
| 3857 | TRACE_D3("\n------ Parsing .debug_types section ------\n"); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3858 | } |
| 3859 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3860 | while (True) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3861 | ULong cu_start_offset, cu_offset_now; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3862 | CUConst cc; |
| 3863 | /* It may be that the stated size of this CU is larger than the |
| 3864 | amount of stuff actually in it. icc9 seems to generate CUs |
| 3865 | thusly. We use these variables to figure out if this is |
| 3866 | indeed the case, and if so how many bytes we need to skip to |
| 3867 | get to the start of the next CU. Not skipping those bytes |
| 3868 | causes us to misidentify the start of the next CU, and it all |
| 3869 | goes badly wrong after that (not surprisingly). */ |
| 3870 | UWord cu_size_including_IniLen, cu_amount_used; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3871 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3872 | /* It seems icc9 finishes the DIE info before debug_info_sz |
| 3873 | bytes have been used up. So be flexible, and declare the |
| 3874 | sequence complete if there is not enough remaining bytes to |
| 3875 | hold even the smallest conceivable CU header. (11 bytes I |
| 3876 | reckon). */ |
| 3877 | /* JRS 23Jan09: I suspect this is no longer necessary now that |
| 3878 | the code below contains a 'while (cu_amount_used < |
| 3879 | cu_size_including_IniLen ...' style loop, which skips over |
| 3880 | any leftover bytes at the end of a CU in the case where the |
| 3881 | CU's stated size is larger than its actual size (as |
| 3882 | determined by reading all its DIEs). However, for prudence, |
| 3883 | I'll leave the following test in place. I can't see that a |
| 3884 | CU header can be smaller than 11 bytes, so I don't think |
| 3885 | there's any harm possible through the test -- it just adds |
| 3886 | robustness. */ |
| 3887 | Word avail = get_remaining_length_Cursor( &info ); |
| 3888 | if (avail < 11) { |
| 3889 | if (avail > 0) |
| 3890 | TRACE_D3("new_dwarf3_reader_wrk: warning: " |
| 3891 | "%ld unused bytes after end of DIEs\n", avail); |
| 3892 | break; |
| 3893 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3894 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3895 | /* Check the varparser's stack is in a sane state. */ |
| 3896 | vg_assert(varparser.sp == -1); |
| 3897 | for (i = 0; i < N_D3_VAR_STACK; i++) { |
| 3898 | vg_assert(varparser.ranges[i] == NULL); |
| 3899 | vg_assert(varparser.level[i] == 0); |
| 3900 | } |
| 3901 | for (i = 0; i < N_D3_TYPE_STACK; i++) { |
| 3902 | vg_assert(typarser.qparentE[i].cuOff == D3_INVALID_CUOFF); |
| 3903 | vg_assert(typarser.qparentE[i].tag == Te_EMPTY); |
| 3904 | vg_assert(typarser.qlevel[i] == 0); |
| 3905 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3906 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3907 | cu_start_offset = get_position_of_Cursor( &info ); |
| 3908 | TRACE_D3("\n"); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3909 | TRACE_D3(" Compilation Unit @ offset 0x%llx:\n", cu_start_offset); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3910 | /* parse_CU_header initialises the CU's set_abbv_Cursor cache |
| 3911 | (saC_cache) */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3912 | if (pass == 0) { |
| 3913 | parse_CU_Header( &cc, td3, &info, escn_debug_abbv_alt, |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 3914 | False, True ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3915 | } else { |
| 3916 | parse_CU_Header( &cc, td3, &info, escn_debug_abbv, |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 3917 | pass == 2, False ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3918 | } |
| 3919 | cc.escn_debug_str = pass == 0 ? escn_debug_str_alt |
| 3920 | : escn_debug_str; |
| 3921 | cc.escn_debug_ranges = escn_debug_ranges; |
| 3922 | cc.escn_debug_loc = escn_debug_loc; |
| 3923 | cc.escn_debug_line = pass == 0 ? escn_debug_line_alt |
| 3924 | : escn_debug_line; |
| 3925 | cc.escn_debug_info = pass == 0 ? escn_debug_info_alt |
| 3926 | : escn_debug_info; |
| 3927 | cc.escn_debug_types = escn_debug_types; |
| 3928 | cc.escn_debug_info_alt = escn_debug_info_alt; |
| 3929 | cc.escn_debug_str_alt = escn_debug_str_alt; |
| 3930 | cc.types_cuOff_bias = escn_debug_info.szB; |
| 3931 | cc.alt_cuOff_bias = escn_debug_info.szB + escn_debug_types.szB; |
| 3932 | cc.cu_start_offset = cu_start_offset; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3933 | cc.di = di; |
| 3934 | /* The CU's svma can be deduced by looking at the AT_low_pc |
| 3935 | value in the top level TAG_compile_unit, which is the topmost |
| 3936 | DIE. We'll leave it for the 'varparser' to acquire that info |
| 3937 | and fill it in -- since it is the only party to want to know |
| 3938 | it. */ |
| 3939 | cc.cu_svma_known = False; |
| 3940 | cc.cu_svma = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3941 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3942 | cc.signature_types = signature_types; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3943 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3944 | /* Create a fake outermost-level range covering the entire |
| 3945 | address range. So we always have *something* to catch all |
| 3946 | variable declarations. */ |
| 3947 | varstack_push( &cc, &varparser, td3, |
| 3948 | unitary_range_list(0UL, ~0UL), |
| 3949 | -1, False/*isFunc*/, NULL/*fbGX*/ ); |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 3950 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3951 | /* And set up the file name table. When we come across the top |
| 3952 | level DIE for this CU (which is what the next call to |
| 3953 | read_DIE should process) we will copy all the file names out |
| 3954 | of the .debug_line img area and use this table to look up the |
| 3955 | copies when we later see filename numbers in DW_TAG_variables |
| 3956 | etc. */ |
| 3957 | vg_assert(!varparser.filenameTable ); |
| 3958 | varparser.filenameTable |
| 3959 | = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.ndrw.5", |
| 3960 | ML_(dinfo_free), |
| 3961 | sizeof(UChar*) ); |
| 3962 | vg_assert(varparser.filenameTable); |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 3963 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3964 | /* Now read the one-and-only top-level DIE for this CU. */ |
| 3965 | vg_assert(varparser.sp == 0); |
| 3966 | read_DIE( rangestree, |
| 3967 | tyents, tempvars, gexprs, |
| 3968 | &typarser, &varparser, |
| 3969 | &info, td3, &cc, 0 ); |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 3970 | |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 3971 | cu_offset_now = get_position_of_Cursor( &info ); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3972 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3973 | if (0) VG_(printf)("Travelled: %llu size %llu\n", |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3974 | cu_offset_now - cc.cu_start_offset, |
| 3975 | cc.unit_length + (cc.is_dw64 ? 12 : 4)); |
| 3976 | |
| 3977 | /* How big the CU claims it is .. */ |
| 3978 | cu_size_including_IniLen = cc.unit_length + (cc.is_dw64 ? 12 : 4); |
| 3979 | /* .. vs how big we have found it to be */ |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 3980 | cu_amount_used = cu_offset_now - cc.cu_start_offset; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3981 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3982 | if (1) TRACE_D3("offset now %lld, d-i-size %lld\n", |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3983 | cu_offset_now, section_size); |
| 3984 | if (cu_offset_now > section_size) |
| 3985 | barf("toplevel DIEs beyond end of CU"); |
| 3986 | |
| 3987 | /* If the CU is bigger than it claims to be, we've got a serious |
| 3988 | problem. */ |
| 3989 | if (cu_amount_used > cu_size_including_IniLen) |
| 3990 | barf("CU's actual size appears to be larger than it claims it is"); |
| 3991 | |
| 3992 | /* If the CU is smaller than it claims to be, we need to skip some |
| 3993 | bytes. Loop updates cu_offset_new and cu_amount_used. */ |
| 3994 | while (cu_amount_used < cu_size_including_IniLen |
| 3995 | && get_remaining_length_Cursor( &info ) > 0) { |
| 3996 | if (0) VG_(printf)("SKIP\n"); |
| 3997 | (void)get_UChar( &info ); |
| 3998 | cu_offset_now = get_position_of_Cursor( &info ); |
| 3999 | cu_amount_used = cu_offset_now - cc.cu_start_offset; |
| 4000 | } |
| 4001 | |
| 4002 | /* Preen to level -2. DIEs have level >= 0 so -2 cannot occur |
| 4003 | anywhere else at all. Our fake the-entire-address-space |
| 4004 | range is at level -1, so preening to -2 should completely |
| 4005 | empty the stack out. */ |
| 4006 | TRACE_D3("\n"); |
| 4007 | varstack_preen( &varparser, td3, -2 ); |
| 4008 | /* Similarly, empty the type stack out. */ |
| 4009 | typestack_preen( &typarser, td3, -2 ); |
| 4010 | |
| 4011 | TRACE_D3("set_abbv_Cursor cache: %lu queries, %lu misses\n", |
| 4012 | cc.saC_cache_queries, cc.saC_cache_misses); |
| 4013 | |
| 4014 | vg_assert(varparser.filenameTable ); |
| 4015 | VG_(deleteXA)( varparser.filenameTable ); |
| 4016 | varparser.filenameTable = NULL; |
| 4017 | |
| 4018 | if (cu_offset_now == section_size) |
| 4019 | break; |
| 4020 | /* else keep going */ |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 4021 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4022 | } |
| 4023 | |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4024 | /* From here on we're post-processing the stuff we got |
| 4025 | out of the .debug_info section. */ |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4026 | if (td3) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4027 | TRACE_D3("\n"); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4028 | ML_(pp_TyEnts)(tyents, "Initial type entity (TyEnt) array"); |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4029 | TRACE_D3("\n"); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4030 | TRACE_D3("------ Compressing type entries ------\n"); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4031 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4032 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4033 | tyents_cache = ML_(dinfo_zalloc)( "di.readdwarf3.ndrw.6", |
| 4034 | sizeof(TyEntIndexCache) ); |
| 4035 | ML_(TyEntIndexCache__invalidate)( tyents_cache ); |
| 4036 | dedup_types( td3, tyents, tyents_cache ); |
| 4037 | if (td3) { |
| 4038 | TRACE_D3("\n"); |
| 4039 | ML_(pp_TyEnts)(tyents, "After type entity (TyEnt) compression"); |
| 4040 | } |
| 4041 | |
| 4042 | TRACE_D3("\n"); |
| 4043 | TRACE_D3("------ Resolving the types of variables ------\n" ); |
| 4044 | resolve_variable_types( barf, tyents, tyents_cache, tempvars ); |
| 4045 | |
| 4046 | /* Copy all the non-INDIR tyents into a new table. For large |
| 4047 | .so's, about 90% of the tyents will by now have been resolved to |
| 4048 | INDIRs, and we no longer need them, and so don't need to store |
| 4049 | them. */ |
| 4050 | tyents_to_keep |
| 4051 | = VG_(newXA)( ML_(dinfo_zalloc), |
| 4052 | "di.readdwarf3.ndrw.7 (TyEnt to-keep array)", |
| 4053 | ML_(dinfo_free), sizeof(TyEnt) ); |
| 4054 | n = VG_(sizeXA)( tyents ); |
| 4055 | for (i = 0; i < n; i++) { |
| 4056 | TyEnt* ent = VG_(indexXA)( tyents, i ); |
| 4057 | if (ent->tag != Te_INDIR) |
| 4058 | VG_(addToXA)( tyents_to_keep, ent ); |
| 4059 | } |
| 4060 | |
| 4061 | VG_(deleteXA)( tyents ); |
| 4062 | tyents = NULL; |
| 4063 | ML_(dinfo_free)( tyents_cache ); |
| 4064 | tyents_cache = NULL; |
| 4065 | |
| 4066 | /* Sort tyents_to_keep so we can lookup in it. A complete (if |
| 4067 | minor) waste of time, since tyents itself is sorted, but |
| 4068 | necessary since VG_(lookupXA) refuses to cooperate if we |
| 4069 | don't. */ |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 4070 | VG_(setCmpFnXA)( tyents_to_keep, (XACmpFn_t) ML_(TyEnt__cmp_by_cuOff_only) ); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4071 | VG_(sortXA)( tyents_to_keep ); |
| 4072 | |
| 4073 | /* Enable cacheing on tyents_to_keep */ |
| 4074 | tyents_to_keep_cache |
| 4075 | = ML_(dinfo_zalloc)( "di.readdwarf3.ndrw.8", |
| 4076 | sizeof(TyEntIndexCache) ); |
| 4077 | ML_(TyEntIndexCache__invalidate)( tyents_to_keep_cache ); |
| 4078 | |
| 4079 | /* And record the tyents in the DebugInfo. We do this before |
| 4080 | starting to hand variables to ML_(addVar), since if ML_(addVar) |
| 4081 | wants to do debug printing (of the types of said vars) then it |
| 4082 | will need the tyents.*/ |
| 4083 | vg_assert(!di->admin_tyents); |
| 4084 | di->admin_tyents = tyents_to_keep; |
| 4085 | |
tom | 402c9ee | 2009-03-09 09:19:03 +0000 | [diff] [blame] | 4086 | /* Bias all the location expressions. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4087 | TRACE_D3("\n"); |
| 4088 | TRACE_D3("------ Biasing the location expressions ------\n" ); |
sewardj | 68a2ebd | 2008-03-07 22:17:31 +0000 | [diff] [blame] | 4089 | |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4090 | n = VG_(sizeXA)( gexprs ); |
| 4091 | for (i = 0; i < n; i++) { |
| 4092 | gexpr = *(GExpr**)VG_(indexXA)( gexprs, i ); |
tom | 402c9ee | 2009-03-09 09:19:03 +0000 | [diff] [blame] | 4093 | bias_GX( gexpr, di ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4094 | } |
| 4095 | |
| 4096 | TRACE_D3("\n"); |
| 4097 | TRACE_D3("------ Acquired the following variables: ------\n\n"); |
| 4098 | |
| 4099 | /* Park (pointers to) all the vars in an XArray, so we can look up |
| 4100 | abstract origins quickly. The array is sorted (hence, looked-up |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4101 | by) the .dioff fields. Since the .dioffs should be in strictly |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4102 | ascending order, there is no need to sort the array after |
| 4103 | construction. The ascendingness is however asserted for. */ |
| 4104 | dioff_lookup_tab |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4105 | = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.ndrw.9", |
| 4106 | ML_(dinfo_free), |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4107 | sizeof(TempVar*) ); |
| 4108 | vg_assert(dioff_lookup_tab); |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4109 | |
| 4110 | n = VG_(sizeXA)( tempvars ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4111 | Word first_primary_var = 0; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 4112 | for (first_primary_var = 0; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4113 | escn_debug_info_alt.szB/*really?*/ && first_primary_var < n; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 4114 | first_primary_var++) { |
| 4115 | varp = *(TempVar**)VG_(indexXA)( tempvars, first_primary_var ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4116 | if (varp->dioff < escn_debug_info.szB + escn_debug_types.szB) |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 4117 | break; |
| 4118 | } |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4119 | for (i = 0; i < n; i++) { |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 4120 | varp = *(TempVar**)VG_(indexXA)( tempvars, (i + first_primary_var) % n ); |
| 4121 | if (i > first_primary_var) { |
| 4122 | varp2 = *(TempVar**)VG_(indexXA)( tempvars, |
| 4123 | (i + first_primary_var - 1) % n ); |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4124 | /* why should this hold? Only, I think, because we've |
| 4125 | constructed the array by reading .debug_info sequentially, |
| 4126 | and so the array .dioff fields should reflect that, and be |
| 4127 | strictly ascending. */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4128 | vg_assert(varp2->dioff < varp->dioff); |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4129 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4130 | VG_(addToXA)( dioff_lookup_tab, &varp ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4131 | } |
| 4132 | VG_(setCmpFnXA)( dioff_lookup_tab, cmp_TempVar_by_dioff ); |
| 4133 | VG_(sortXA)( dioff_lookup_tab ); /* POINTLESS; FIXME: rm */ |
| 4134 | |
| 4135 | /* Now visit each var. Collect up as much info as possible for |
| 4136 | each var and hand it to ML_(addVar). */ |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4137 | n = VG_(sizeXA)( tempvars ); |
| 4138 | for (j = 0; j < n; j++) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4139 | TyEnt* ent; |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4140 | varp = *(TempVar**)VG_(indexXA)( tempvars, j ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4141 | |
| 4142 | /* Possibly show .. */ |
| 4143 | if (td3) { |
| 4144 | VG_(printf)("<%lx> addVar: level %d: %s :: ", |
| 4145 | varp->dioff, |
| 4146 | varp->level, |
florian | 1636d33 | 2012-11-15 04:27:04 +0000 | [diff] [blame] | 4147 | varp->name ? varp->name : "<anon_var>" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4148 | if (varp->typeR) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4149 | ML_(pp_TyEnt_C_ishly)( tyents_to_keep, varp->typeR ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4150 | } else { |
| 4151 | VG_(printf)("NULL"); |
| 4152 | } |
| 4153 | VG_(printf)("\n Loc="); |
| 4154 | if (varp->gexpr) { |
| 4155 | ML_(pp_GX)(varp->gexpr); |
| 4156 | } else { |
| 4157 | VG_(printf)("NULL"); |
| 4158 | } |
| 4159 | VG_(printf)("\n"); |
| 4160 | if (varp->fbGX) { |
| 4161 | VG_(printf)(" FrB="); |
| 4162 | ML_(pp_GX)( varp->fbGX ); |
| 4163 | VG_(printf)("\n"); |
| 4164 | } else { |
| 4165 | VG_(printf)(" FrB=none\n"); |
| 4166 | } |
| 4167 | VG_(printf)(" declared at: %s:%d\n", |
florian | 1636d33 | 2012-11-15 04:27:04 +0000 | [diff] [blame] | 4168 | varp->fName ? varp->fName : "NULL", |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4169 | varp->fLine ); |
| 4170 | if (varp->absOri != (UWord)D3_INVALID_CUOFF) |
| 4171 | VG_(printf)(" abstract origin: <%lx>\n", varp->absOri); |
| 4172 | } |
| 4173 | |
| 4174 | /* Skip variables which have no location. These must be |
| 4175 | abstract instances; they are useless as-is since with no |
| 4176 | location they have no specified memory location. They will |
| 4177 | presumably be referred to via the absOri fields of other |
| 4178 | variables. */ |
| 4179 | if (!varp->gexpr) { |
| 4180 | TRACE_D3(" SKIP (no location)\n\n"); |
| 4181 | continue; |
| 4182 | } |
| 4183 | |
| 4184 | /* So it has a location, at least. If it refers to some other |
| 4185 | entry through its absOri field, pull in further info through |
| 4186 | that. */ |
| 4187 | if (varp->absOri != (UWord)D3_INVALID_CUOFF) { |
| 4188 | Bool found; |
| 4189 | Word ixFirst, ixLast; |
| 4190 | TempVar key; |
| 4191 | TempVar* keyp = &key; |
| 4192 | TempVar *varAI; |
| 4193 | VG_(memset)(&key, 0, sizeof(key)); /* not necessary */ |
| 4194 | key.dioff = varp->absOri; /* this is what we want to find */ |
| 4195 | found = VG_(lookupXA)( dioff_lookup_tab, &keyp, |
| 4196 | &ixFirst, &ixLast ); |
sewardj | bdee918 | 2010-10-08 23:57:25 +0000 | [diff] [blame] | 4197 | if (!found) { |
| 4198 | /* barf("DW_AT_abstract_origin can't be resolved"); */ |
| 4199 | TRACE_D3(" SKIP (DW_AT_abstract_origin can't be resolved)\n\n"); |
| 4200 | continue; |
| 4201 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4202 | /* If the following fails, there is more than one entry with |
| 4203 | the same dioff. Which can't happen. */ |
| 4204 | vg_assert(ixFirst == ixLast); |
| 4205 | varAI = *(TempVar**)VG_(indexXA)( dioff_lookup_tab, ixFirst ); |
| 4206 | /* stay sane */ |
| 4207 | vg_assert(varAI); |
| 4208 | vg_assert(varAI->dioff == varp->absOri); |
| 4209 | |
| 4210 | /* Copy what useful info we can. */ |
| 4211 | if (varAI->typeR && !varp->typeR) |
| 4212 | varp->typeR = varAI->typeR; |
| 4213 | if (varAI->name && !varp->name) |
| 4214 | varp->name = varAI->name; |
| 4215 | if (varAI->fName && !varp->fName) |
| 4216 | varp->fName = varAI->fName; |
| 4217 | if (varAI->fLine > 0 && varp->fLine == 0) |
| 4218 | varp->fLine = varAI->fLine; |
| 4219 | } |
| 4220 | |
| 4221 | /* Give it a name if it doesn't have one. */ |
| 4222 | if (!varp->name) |
| 4223 | varp->name = ML_(addStr)( di, "<anon_var>", -1 ); |
| 4224 | |
| 4225 | /* So now does it have enough info to be useful? */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4226 | /* NOTE: re typeR: this is a hack. If typeR is Te_UNKNOWN then |
| 4227 | the type didn't get resolved. Really, in that case |
| 4228 | something's broken earlier on, and should be fixed, rather |
| 4229 | than just skipping the variable. */ |
| 4230 | ent = ML_(TyEnts__index_by_cuOff)( tyents_to_keep, |
| 4231 | tyents_to_keep_cache, |
| 4232 | varp->typeR ); |
| 4233 | /* The next two assertions should be guaranteed by |
| 4234 | our previous call to resolve_variable_types. */ |
| 4235 | vg_assert(ent); |
| 4236 | vg_assert(ML_(TyEnt__is_type)(ent) || ent->tag == Te_UNKNOWN); |
| 4237 | |
| 4238 | if (ent->tag == Te_UNKNOWN) continue; |
| 4239 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4240 | vg_assert(varp->gexpr); |
| 4241 | vg_assert(varp->name); |
| 4242 | vg_assert(varp->typeR); |
| 4243 | vg_assert(varp->level >= 0); |
| 4244 | |
| 4245 | /* Ok. So we're going to keep it. Call ML_(addVar) once for |
| 4246 | each address range in which the variable exists. */ |
| 4247 | TRACE_D3(" ACQUIRE for range(s) "); |
| 4248 | { AddrRange oneRange; |
| 4249 | AddrRange* varPcRanges; |
| 4250 | Word nVarPcRanges; |
| 4251 | /* Set up to iterate over address ranges, however |
| 4252 | represented. */ |
| 4253 | if (varp->nRanges == 0 || varp->nRanges == 1) { |
| 4254 | vg_assert(!varp->rngMany); |
| 4255 | if (varp->nRanges == 0) { |
| 4256 | vg_assert(varp->rngOneMin == 0); |
| 4257 | vg_assert(varp->rngOneMax == 0); |
| 4258 | } |
| 4259 | nVarPcRanges = varp->nRanges; |
| 4260 | oneRange.aMin = varp->rngOneMin; |
| 4261 | oneRange.aMax = varp->rngOneMax; |
| 4262 | varPcRanges = &oneRange; |
| 4263 | } else { |
| 4264 | vg_assert(varp->rngMany); |
| 4265 | vg_assert(varp->rngOneMin == 0); |
| 4266 | vg_assert(varp->rngOneMax == 0); |
| 4267 | nVarPcRanges = VG_(sizeXA)(varp->rngMany); |
| 4268 | vg_assert(nVarPcRanges >= 2); |
| 4269 | vg_assert(nVarPcRanges == (Word)varp->nRanges); |
| 4270 | varPcRanges = VG_(indexXA)(varp->rngMany, 0); |
| 4271 | } |
| 4272 | if (varp->level == 0) |
| 4273 | vg_assert( nVarPcRanges == 1 ); |
| 4274 | /* and iterate */ |
| 4275 | for (i = 0; i < nVarPcRanges; i++) { |
| 4276 | Addr pcMin = varPcRanges[i].aMin; |
| 4277 | Addr pcMax = varPcRanges[i].aMax; |
| 4278 | vg_assert(pcMin <= pcMax); |
| 4279 | /* Level 0 is the global address range. So at level 0 we |
| 4280 | don't want to bias pcMin/pcMax; but at all other levels |
| 4281 | we do since those are derived from svmas in the Dwarf |
| 4282 | we're reading. Be paranoid ... */ |
| 4283 | if (varp->level == 0) { |
| 4284 | vg_assert(pcMin == (Addr)0); |
| 4285 | vg_assert(pcMax == ~(Addr)0); |
| 4286 | } else { |
| 4287 | /* vg_assert(pcMin > (Addr)0); |
| 4288 | No .. we can legitimately expect to see ranges like |
| 4289 | 0x0-0x11D (pre-biasing, of course). */ |
| 4290 | vg_assert(pcMax < ~(Addr)0); |
| 4291 | } |
| 4292 | |
sewardj | 68a2ebd | 2008-03-07 22:17:31 +0000 | [diff] [blame] | 4293 | /* Apply text biasing, for non-global variables. */ |
| 4294 | if (varp->level > 0) { |
tom | 402c9ee | 2009-03-09 09:19:03 +0000 | [diff] [blame] | 4295 | pcMin += di->text_debug_bias; |
| 4296 | pcMax += di->text_debug_bias; |
sewardj | 68a2ebd | 2008-03-07 22:17:31 +0000 | [diff] [blame] | 4297 | } |
| 4298 | |
| 4299 | if (i > 0 && (i%2) == 0) |
| 4300 | TRACE_D3("\n "); |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 4301 | TRACE_D3("[%#lx,%#lx] ", pcMin, pcMax ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4302 | |
| 4303 | ML_(addVar)( |
| 4304 | di, varp->level, |
sewardj | 68a2ebd | 2008-03-07 22:17:31 +0000 | [diff] [blame] | 4305 | pcMin, pcMax, |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4306 | varp->name, varp->typeR, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4307 | varp->gexpr, varp->fbGX, |
| 4308 | varp->fName, varp->fLine, td3 |
| 4309 | ); |
| 4310 | } |
| 4311 | } |
| 4312 | |
| 4313 | TRACE_D3("\n\n"); |
| 4314 | /* and move on to the next var */ |
| 4315 | } |
| 4316 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4317 | /* Now free all the TempVars */ |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4318 | n = VG_(sizeXA)( tempvars ); |
| 4319 | for (i = 0; i < n; i++) { |
| 4320 | varp = *(TempVar**)VG_(indexXA)( tempvars, i ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4321 | ML_(dinfo_free)(varp); |
| 4322 | } |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4323 | VG_(deleteXA)( tempvars ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4324 | tempvars = NULL; |
| 4325 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4326 | /* and the temp lookup table */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4327 | VG_(deleteXA)( dioff_lookup_tab ); |
| 4328 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4329 | /* and the ranges tree. Note that we need to also free the XArrays |
| 4330 | which constitute the keys, hence pass VG_(deleteXA) as a |
| 4331 | key-finalizer. */ |
| 4332 | VG_(deleteFM)( rangestree, (void(*)(UWord))VG_(deleteXA), NULL ); |
| 4333 | |
| 4334 | /* and the tyents_to_keep cache */ |
| 4335 | ML_(dinfo_free)( tyents_to_keep_cache ); |
| 4336 | tyents_to_keep_cache = NULL; |
| 4337 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4338 | vg_assert( varparser.filenameTable == NULL ); |
| 4339 | |
| 4340 | /* And the signatured type hash. */ |
| 4341 | VG_(HT_destruct) ( signature_types, ML_(dinfo_free) ); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4342 | |
| 4343 | /* record the GExprs in di so they can be freed later */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4344 | vg_assert(!di->admin_gexprs); |
| 4345 | di->admin_gexprs = gexprs; |
| 4346 | } |
| 4347 | |
| 4348 | |
| 4349 | /*------------------------------------------------------------*/ |
| 4350 | /*--- ---*/ |
| 4351 | /*--- The "new" DWARF3 reader -- top level control logic ---*/ |
| 4352 | /*--- ---*/ |
| 4353 | /*------------------------------------------------------------*/ |
| 4354 | |
sewardj | 6c591e1 | 2011-04-11 16:17:51 +0000 | [diff] [blame] | 4355 | static Bool d3rd_jmpbuf_valid = False; |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 4356 | static const HChar* d3rd_jmpbuf_reason = NULL; |
sewardj | 97d3ebb | 2011-04-11 18:36:34 +0000 | [diff] [blame] | 4357 | static VG_MINIMAL_JMP_BUF(d3rd_jmpbuf); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4358 | |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 4359 | static __attribute__((noreturn)) void barf ( const HChar* reason ) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4360 | vg_assert(d3rd_jmpbuf_valid); |
| 4361 | d3rd_jmpbuf_reason = reason; |
sewardj | 6c591e1 | 2011-04-11 16:17:51 +0000 | [diff] [blame] | 4362 | VG_MINIMAL_LONGJMP(d3rd_jmpbuf); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4363 | /*NOTREACHED*/ |
| 4364 | vg_assert(0); |
| 4365 | } |
| 4366 | |
| 4367 | |
| 4368 | void |
| 4369 | ML_(new_dwarf3_reader) ( |
| 4370 | struct _DebugInfo* di, |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4371 | DiSlice escn_debug_info, DiSlice escn_debug_types, |
| 4372 | DiSlice escn_debug_abbv, DiSlice escn_debug_line, |
| 4373 | DiSlice escn_debug_str, DiSlice escn_debug_ranges, |
| 4374 | DiSlice escn_debug_loc, DiSlice escn_debug_info_alt, |
| 4375 | DiSlice escn_debug_abbv_alt, DiSlice escn_debug_line_alt, |
| 4376 | DiSlice escn_debug_str_alt |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4377 | ) |
| 4378 | { |
| 4379 | volatile Int jumped; |
| 4380 | volatile Bool td3 = di->trace_symtab; |
| 4381 | |
| 4382 | /* Run the _wrk function to read the dwarf3. If it succeeds, it |
| 4383 | just returns normally. If there is any failure, it longjmp's |
| 4384 | back here, having first set d3rd_jmpbuf_reason to something |
| 4385 | useful. */ |
| 4386 | vg_assert(d3rd_jmpbuf_valid == False); |
| 4387 | vg_assert(d3rd_jmpbuf_reason == NULL); |
| 4388 | |
| 4389 | d3rd_jmpbuf_valid = True; |
sewardj | 6c591e1 | 2011-04-11 16:17:51 +0000 | [diff] [blame] | 4390 | jumped = VG_MINIMAL_SETJMP(d3rd_jmpbuf); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4391 | if (jumped == 0) { |
| 4392 | /* try this ... */ |
| 4393 | new_dwarf3_reader_wrk( di, barf, |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4394 | escn_debug_info, escn_debug_types, |
| 4395 | escn_debug_abbv, escn_debug_line, |
| 4396 | escn_debug_str, escn_debug_ranges, |
| 4397 | escn_debug_loc, escn_debug_info_alt, |
| 4398 | escn_debug_abbv_alt, escn_debug_line_alt, |
| 4399 | escn_debug_str_alt ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4400 | d3rd_jmpbuf_valid = False; |
| 4401 | TRACE_D3("\n------ .debug_info reading was successful ------\n"); |
| 4402 | } else { |
| 4403 | /* It longjmp'd. */ |
| 4404 | d3rd_jmpbuf_valid = False; |
| 4405 | /* Can't longjump without giving some sort of reason. */ |
| 4406 | vg_assert(d3rd_jmpbuf_reason != NULL); |
| 4407 | |
| 4408 | TRACE_D3("\n------ .debug_info reading failed ------\n"); |
| 4409 | |
| 4410 | ML_(symerr)(di, True, d3rd_jmpbuf_reason); |
| 4411 | } |
| 4412 | |
| 4413 | d3rd_jmpbuf_valid = False; |
| 4414 | d3rd_jmpbuf_reason = NULL; |
| 4415 | } |
| 4416 | |
| 4417 | |
| 4418 | |
| 4419 | /* --- Unused code fragments which might be useful one day. --- */ |
| 4420 | |
| 4421 | #if 0 |
| 4422 | /* Read the arange tables */ |
| 4423 | TRACE_SYMTAB("\n"); |
| 4424 | TRACE_SYMTAB("\n------ The contents of .debug_arange ------\n"); |
| 4425 | init_Cursor( &aranges, debug_aranges_img, |
| 4426 | debug_aranges_sz, 0, barf, |
| 4427 | "Overrun whilst reading .debug_aranges section" ); |
| 4428 | while (True) { |
| 4429 | ULong len, d_i_offset; |
| 4430 | Bool is64; |
| 4431 | UShort version; |
| 4432 | UChar asize, segsize; |
| 4433 | |
| 4434 | if (is_at_end_Cursor( &aranges )) |
| 4435 | break; |
| 4436 | /* Read one arange thingy */ |
| 4437 | /* initial_length field */ |
| 4438 | len = get_Initial_Length( &is64, &aranges, |
| 4439 | "in .debug_aranges: invalid initial-length field" ); |
| 4440 | version = get_UShort( &aranges ); |
| 4441 | d_i_offset = get_Dwarfish_UWord( &aranges, is64 ); |
| 4442 | asize = get_UChar( &aranges ); |
| 4443 | segsize = get_UChar( &aranges ); |
| 4444 | TRACE_D3(" Length: %llu\n", len); |
| 4445 | TRACE_D3(" Version: %d\n", (Int)version); |
| 4446 | TRACE_D3(" Offset into .debug_info: %llx\n", d_i_offset); |
| 4447 | TRACE_D3(" Pointer Size: %d\n", (Int)asize); |
| 4448 | TRACE_D3(" Segment Size: %d\n", (Int)segsize); |
| 4449 | TRACE_D3("\n"); |
| 4450 | TRACE_D3(" Address Length\n"); |
| 4451 | |
| 4452 | while ((get_position_of_Cursor( &aranges ) % (2 * asize)) > 0) { |
| 4453 | (void)get_UChar( & aranges ); |
| 4454 | } |
| 4455 | while (True) { |
| 4456 | ULong address = get_Dwarfish_UWord( &aranges, asize==8 ); |
| 4457 | ULong length = get_Dwarfish_UWord( &aranges, asize==8 ); |
| 4458 | TRACE_D3(" 0x%016llx 0x%llx\n", address, length); |
| 4459 | if (address == 0 && length == 0) break; |
| 4460 | } |
| 4461 | } |
| 4462 | TRACE_SYMTAB("\n"); |
| 4463 | #endif |
| 4464 | |
njn | 8b68b64 | 2009-06-24 00:37:09 +0000 | [diff] [blame] | 4465 | #endif // defined(VGO_linux) || defined(VGO_darwin) |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 4466 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4467 | /*--------------------------------------------------------------------*/ |
njn | 8b68b64 | 2009-06-24 00:37:09 +0000 | [diff] [blame] | 4468 | /*--- end ---*/ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4469 | /*--------------------------------------------------------------------*/ |