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 | |
Elliott Hughes | ed39800 | 2017-06-21 14:41:24 -0700 | [diff] [blame^] | 12 | Copyright (C) 2008-2017 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 | |
sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 38 | #if defined(VGO_linux) || defined(VGO_darwin) || defined(VGO_solaris) |
njn | 8b68b64 | 2009-06-24 00:37:09 +0000 | [diff] [blame] | 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...) \ |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 164 | if (UNLIKELY(td3)) { VG_(printf)(format, ## args); } |
philippe | e0bd591 | 2014-06-21 09:48:17 +0000 | [diff] [blame] | 165 | #define TD3 (UNLIKELY(td3)) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 166 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 167 | #define D3_INVALID_CUOFF ((UWord)(-1UL)) |
| 168 | #define D3_FAKEVOID_CUOFF ((UWord)(-2UL)) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 169 | |
| 170 | typedef |
| 171 | struct { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 172 | DiSlice sli; // to which this cursor applies |
| 173 | DiOffT sli_next; // offset in underlying DiImage; must be >= sli.ioff |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 174 | void (*barf)( const HChar* ) __attribute__((noreturn)); |
| 175 | const HChar* barfstr; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 176 | } |
| 177 | Cursor; |
| 178 | |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 179 | static inline Bool is_sane_Cursor ( const Cursor* c ) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 180 | if (!c) return False; |
| 181 | if (!c->barf) return False; |
| 182 | if (!c->barfstr) return False; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 183 | if (!ML_(sli_is_valid)(c->sli)) return False; |
| 184 | if (c->sli.ioff == DiOffT_INVALID) return False; |
| 185 | if (c->sli_next < c->sli.ioff) return False; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 186 | return True; |
| 187 | } |
| 188 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 189 | // Initialise a cursor from a DiSlice (ELF section, really) so as to |
| 190 | // start reading at offset |sli_initial_offset| from the start of the |
| 191 | // slice. |
| 192 | static void init_Cursor ( /*OUT*/Cursor* c, |
| 193 | DiSlice sli, |
| 194 | ULong sli_initial_offset, |
| 195 | __attribute__((noreturn)) void (*barf)(const HChar*), |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 196 | const HChar* barfstr ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 197 | { |
| 198 | vg_assert(c); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 199 | VG_(bzero_inline)(c, sizeof(*c)); |
| 200 | c->sli = sli; |
| 201 | c->sli_next = c->sli.ioff + sli_initial_offset; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 202 | c->barf = barf; |
| 203 | c->barfstr = barfstr; |
| 204 | vg_assert(is_sane_Cursor(c)); |
| 205 | } |
| 206 | |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 207 | static Bool is_at_end_Cursor ( const Cursor* c ) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 208 | vg_assert(is_sane_Cursor(c)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 209 | return c->sli_next >= c->sli.ioff + c->sli.szB; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 210 | } |
| 211 | |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 212 | static inline ULong get_position_of_Cursor ( const Cursor* c ) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 213 | vg_assert(is_sane_Cursor(c)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 214 | return c->sli_next - c->sli.ioff; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 215 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 216 | static inline void set_position_of_Cursor ( Cursor* c, ULong pos ) { |
| 217 | c->sli_next = c->sli.ioff + pos; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 218 | vg_assert(is_sane_Cursor(c)); |
| 219 | } |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 220 | static inline void advance_position_of_Cursor ( Cursor* c, ULong delta ) { |
| 221 | c->sli_next += delta; |
| 222 | vg_assert(is_sane_Cursor(c)); |
| 223 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 224 | |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 225 | static /*signed*/Long get_remaining_length_Cursor ( const Cursor* c ) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 226 | vg_assert(is_sane_Cursor(c)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 227 | return c->sli.ioff + c->sli.szB - c->sli_next; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 228 | } |
| 229 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 230 | //static void* get_address_of_Cursor ( Cursor* c ) { |
| 231 | // vg_assert(is_sane_Cursor(c)); |
| 232 | // return &c->region_start_img[ c->region_next ]; |
| 233 | //} |
| 234 | |
florian | 3297124 | 2014-10-23 17:47:15 +0000 | [diff] [blame] | 235 | static DiCursor get_DiCursor_from_Cursor ( const Cursor* c ) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 236 | return mk_DiCursor(c->sli.img, c->sli_next); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 237 | } |
| 238 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 239 | /* FIXME: document assumptions on endianness for |
| 240 | get_UShort/UInt/ULong. */ |
| 241 | static inline UChar get_UChar ( Cursor* c ) { |
| 242 | UChar r; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 243 | vg_assert(is_sane_Cursor(c)); |
| 244 | if (c->sli_next + sizeof(UChar) > c->sli.ioff + c->sli.szB) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 245 | c->barf(c->barfstr); |
| 246 | /*NOTREACHED*/ |
| 247 | vg_assert(0); |
| 248 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 249 | r = ML_(img_get_UChar)(c->sli.img, c->sli_next); |
| 250 | c->sli_next += sizeof(UChar); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 251 | return r; |
| 252 | } |
| 253 | static UShort get_UShort ( Cursor* c ) { |
| 254 | UShort r; |
| 255 | vg_assert(is_sane_Cursor(c)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 256 | if (c->sli_next + sizeof(UShort) > c->sli.ioff + c->sli.szB) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 257 | c->barf(c->barfstr); |
| 258 | /*NOTREACHED*/ |
| 259 | vg_assert(0); |
| 260 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 261 | r = ML_(img_get_UShort)(c->sli.img, c->sli_next); |
| 262 | c->sli_next += sizeof(UShort); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 263 | return r; |
| 264 | } |
| 265 | static UInt get_UInt ( Cursor* c ) { |
| 266 | UInt r; |
| 267 | vg_assert(is_sane_Cursor(c)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 268 | if (c->sli_next + sizeof(UInt) > c->sli.ioff + c->sli.szB) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 269 | c->barf(c->barfstr); |
| 270 | /*NOTREACHED*/ |
| 271 | vg_assert(0); |
| 272 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 273 | r = ML_(img_get_UInt)(c->sli.img, c->sli_next); |
| 274 | c->sli_next += sizeof(UInt); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 275 | return r; |
| 276 | } |
| 277 | static ULong get_ULong ( Cursor* c ) { |
| 278 | ULong r; |
| 279 | vg_assert(is_sane_Cursor(c)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 280 | if (c->sli_next + sizeof(ULong) > c->sli.ioff + c->sli.szB) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 281 | c->barf(c->barfstr); |
| 282 | /*NOTREACHED*/ |
| 283 | vg_assert(0); |
| 284 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 285 | r = ML_(img_get_ULong)(c->sli.img, c->sli_next); |
| 286 | c->sli_next += sizeof(ULong); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 287 | return r; |
| 288 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 289 | static ULong get_ULEB128 ( Cursor* c ) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 290 | ULong result; |
| 291 | Int shift; |
| 292 | UChar byte; |
| 293 | /* unroll first iteration */ |
| 294 | byte = get_UChar( c ); |
| 295 | result = (ULong)(byte & 0x7f); |
| 296 | if (LIKELY(!(byte & 0x80))) return result; |
| 297 | shift = 7; |
| 298 | /* end unroll first iteration */ |
| 299 | do { |
| 300 | byte = get_UChar( c ); |
| 301 | result |= ((ULong)(byte & 0x7f)) << shift; |
| 302 | shift += 7; |
| 303 | } while (byte & 0x80); |
| 304 | return result; |
| 305 | } |
| 306 | static Long get_SLEB128 ( Cursor* c ) { |
| 307 | ULong result = 0; |
| 308 | Int shift = 0; |
| 309 | UChar byte; |
| 310 | do { |
| 311 | byte = get_UChar(c); |
| 312 | result |= ((ULong)(byte & 0x7f)) << shift; |
| 313 | shift += 7; |
| 314 | } while (byte & 0x80); |
| 315 | if (shift < 64 && (byte & 0x40)) |
| 316 | result |= -(1ULL << shift); |
| 317 | return result; |
| 318 | } |
| 319 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 320 | /* Assume 'c' points to the start of a string. Return a DiCursor of |
| 321 | whatever it points at, and advance it past the terminating zero. |
| 322 | This makes it safe for the caller to then copy the string with |
| 323 | ML_(addStr), since (w.r.t. image overruns) the process of advancing |
| 324 | past the terminating zero will already have "vetted" the string. */ |
| 325 | static DiCursor get_AsciiZ ( Cursor* c ) { |
| 326 | UChar uc; |
| 327 | DiCursor res = get_DiCursor_from_Cursor(c); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 328 | do { uc = get_UChar(c); } while (uc != 0); |
| 329 | return res; |
| 330 | } |
| 331 | |
| 332 | static ULong peek_ULEB128 ( Cursor* c ) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 333 | DiOffT here = c->sli_next; |
| 334 | ULong r = get_ULEB128( c ); |
| 335 | c->sli_next = here; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 336 | return r; |
| 337 | } |
| 338 | static UChar peek_UChar ( Cursor* c ) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 339 | DiOffT here = c->sli_next; |
| 340 | UChar r = get_UChar( c ); |
| 341 | c->sli_next = here; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 342 | return r; |
| 343 | } |
| 344 | |
| 345 | static ULong get_Dwarfish_UWord ( Cursor* c, Bool is_dw64 ) { |
| 346 | return is_dw64 ? get_ULong(c) : (ULong) get_UInt(c); |
| 347 | } |
| 348 | |
| 349 | static UWord get_UWord ( Cursor* c ) { |
| 350 | vg_assert(sizeof(UWord) == sizeof(void*)); |
| 351 | if (sizeof(UWord) == 4) return get_UInt(c); |
| 352 | if (sizeof(UWord) == 8) return get_ULong(c); |
| 353 | vg_assert(0); |
| 354 | } |
| 355 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 356 | /* Read a DWARF3 'Initial Length' field */ |
| 357 | static ULong get_Initial_Length ( /*OUT*/Bool* is64, |
| 358 | Cursor* c, |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 359 | const HChar* barfMsg ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 360 | { |
| 361 | ULong w64; |
| 362 | UInt w32; |
| 363 | *is64 = False; |
| 364 | w32 = get_UInt( c ); |
| 365 | if (w32 >= 0xFFFFFFF0 && w32 < 0xFFFFFFFF) { |
| 366 | c->barf( barfMsg ); |
| 367 | } |
| 368 | else if (w32 == 0xFFFFFFFF) { |
| 369 | *is64 = True; |
| 370 | w64 = get_ULong( c ); |
| 371 | } else { |
| 372 | *is64 = False; |
| 373 | w64 = (ULong)w32; |
| 374 | } |
| 375 | return w64; |
| 376 | } |
| 377 | |
| 378 | |
| 379 | /*------------------------------------------------------------*/ |
| 380 | /*--- ---*/ |
| 381 | /*--- "CUConst" structure ---*/ |
| 382 | /*--- ---*/ |
| 383 | /*------------------------------------------------------------*/ |
| 384 | |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 385 | typedef |
| 386 | struct _name_form { |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 387 | ULong at_name; // Dwarf Attribute name |
philippe | 8167a03 | 2014-11-19 22:21:12 +0000 | [diff] [blame] | 388 | ULong at_form; // Dwarf Attribute form |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 389 | UInt skip_szB; // Nr of bytes skippable from here ... |
| 390 | UInt next_nf; // ... to reach this attr/form index in the g_abbv.nf |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 391 | } name_form; |
philippe | 8167a03 | 2014-11-19 22:21:12 +0000 | [diff] [blame] | 392 | /* skip_szB and next_nf are used to optimise the skipping of uninteresting DIEs. |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 393 | Each name_form maintains how many (fixed) nr of bytes can be skipped from |
| 394 | the beginning of this form till the next attr/form to look at. |
| 395 | The next form to look can be: |
| 396 | an 'interesting' attr/form to read while skipping a DIE |
| 397 | (currently, this is only DW_AT_sibling) |
| 398 | or |
| 399 | a variable length form which must be read to be skipped. |
| 400 | For a variable length form, the skip_szB will be equal to VARSZ_FORM. |
| 401 | |
| 402 | Note: this technique could also be used to speed up the parsing |
| 403 | of DIEs : for each parser kind, we could have the nr of bytes |
| 404 | to skip to directly reach the interesting form(s) for the parser. */ |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 405 | |
| 406 | typedef |
| 407 | struct _g_abbv { |
| 408 | struct _g_abbv *next; // read/write by hash table. |
| 409 | UWord abbv_code; // key, read by hash table |
| 410 | ULong atag; |
| 411 | ULong has_children; |
| 412 | name_form nf[0]; |
| 413 | /* Variable-length array of name/form pairs, terminated |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 414 | by a 0/0 pair. |
| 415 | The skip_szB/next_nf allows to skip efficiently a DIE |
| 416 | described by this g_abbv; */ |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 417 | } g_abbv; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 418 | |
| 419 | /* Holds information that is constant through the parsing of a |
| 420 | Compilation Unit. This is basically plumbed through to |
| 421 | everywhere. */ |
| 422 | typedef |
| 423 | struct { |
| 424 | /* Call here if anything goes wrong */ |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 425 | void (*barf)( const HChar* ) __attribute__((noreturn)); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 426 | /* Is this 64-bit DWARF ? */ |
| 427 | Bool is_dw64; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 428 | /* Which DWARF version ? (2, 3 or 4) */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 429 | UShort version; |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 430 | /* Length of this Compilation Unit, as stated in the |
| 431 | .unit_length :: InitialLength field of the CU Header. |
| 432 | However, this size (as specified by the D3 spec) does not |
| 433 | include the size of the .unit_length field itself, which is |
| 434 | either 4 or 12 bytes (32-bit or 64-bit Dwarf3). That value |
| 435 | can be obtained through the expression ".is_dw64 ? 12 : 4". */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 436 | ULong unit_length; |
| 437 | /* Offset of start of this unit in .debug_info */ |
| 438 | UWord cu_start_offset; |
| 439 | /* SVMA for this CU. In the D3 spec, is known as the "base |
| 440 | address of the compilation unit (last para sec 3.1.1). |
| 441 | Needed for (amongst things) interpretation of location-list |
| 442 | values. */ |
| 443 | Addr cu_svma; |
| 444 | Bool cu_svma_known; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 445 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 446 | /* The debug_abbreviations table to be used for this Unit */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 447 | //UChar* debug_abbv; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 448 | /* Upper bound on size thereof (an overestimate, in general) */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 449 | //UWord debug_abbv_maxszB; |
| 450 | /* A bounded area of the image, to be used as the |
| 451 | debug_abbreviations table tobe used for this Unit. */ |
| 452 | DiSlice debug_abbv; |
| 453 | |
| 454 | /* Image information for various sections. */ |
| 455 | DiSlice escn_debug_str; |
| 456 | DiSlice escn_debug_ranges; |
| 457 | DiSlice escn_debug_loc; |
| 458 | DiSlice escn_debug_line; |
| 459 | DiSlice escn_debug_info; |
| 460 | DiSlice escn_debug_types; |
| 461 | DiSlice escn_debug_info_alt; |
| 462 | DiSlice escn_debug_str_alt; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 463 | /* How much to add to .debug_types resp. alternate .debug_info offsets |
| 464 | in cook_die*. */ |
| 465 | UWord types_cuOff_bias; |
| 466 | UWord alt_cuOff_bias; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 467 | /* --- Needed so we can add stuff to the string table. --- */ |
| 468 | struct _DebugInfo* di; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 469 | /* --- a hash table of g_abbv (i.e. parsed abbreviations) --- */ |
florian | 09a4c79 | 2014-10-18 10:58:05 +0000 | [diff] [blame] | 470 | VgHashTable *ht_abbvs; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 471 | |
| 472 | /* True if this came from .debug_types; otherwise it came from |
| 473 | .debug_info. */ |
| 474 | Bool is_type_unit; |
| 475 | /* For a unit coming from .debug_types, these hold the TU's type |
| 476 | signature and the uncooked DIE offset of the TU's signatured |
| 477 | type. For a unit coming from .debug_info, these are unused. */ |
| 478 | ULong type_signature; |
| 479 | ULong type_offset; |
| 480 | |
| 481 | /* Signatured type hash; computed once and then shared by all |
| 482 | CUs. */ |
florian | 09a4c79 | 2014-10-18 10:58:05 +0000 | [diff] [blame] | 483 | VgHashTable *signature_types; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 484 | |
| 485 | /* True if this came from alternate .debug_info; otherwise |
| 486 | it came from normal .debug_info or .debug_types. */ |
| 487 | Bool is_alt_info; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 488 | } |
| 489 | CUConst; |
| 490 | |
| 491 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 492 | /* Return the cooked value of DIE depending on whether CC represents a |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 493 | .debug_types unit. To cook a DIE, we pretend that the .debug_info, |
| 494 | .debug_types and optional alternate .debug_info sections form |
| 495 | a contiguous whole, so that DIEs coming from .debug_types are numbered |
| 496 | starting at the end of .debug_info and DIEs coming from alternate |
| 497 | .debug_info are numbered starting at the end of .debug_types. */ |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 498 | static UWord cook_die( const CUConst* cc, UWord die ) |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 499 | { |
| 500 | if (cc->is_type_unit) |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 501 | die += cc->types_cuOff_bias; |
| 502 | else if (cc->is_alt_info) |
| 503 | die += cc->alt_cuOff_bias; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 504 | return die; |
| 505 | } |
| 506 | |
| 507 | /* Like cook_die, but understand that DIEs coming from a |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 508 | DW_FORM_ref_sig8 reference are already cooked. Also, handle |
| 509 | DW_FORM_GNU_ref_alt from within primary .debug_info or .debug_types |
| 510 | as reference to alternate .debug_info. */ |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 511 | static UWord cook_die_using_form( const CUConst *cc, UWord die, DW_FORM form) |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 512 | { |
| 513 | if (form == DW_FORM_ref_sig8) |
| 514 | return die; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 515 | if (form == DW_FORM_GNU_ref_alt) |
| 516 | return die + cc->alt_cuOff_bias; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 517 | return cook_die( cc, die ); |
| 518 | } |
| 519 | |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 520 | /* Return the uncooked offset of DIE and set *TYPE_FLAG to true if the DIE |
| 521 | came from the .debug_types section and *ALT_FLAG to true if the DIE |
| 522 | came from alternate .debug_info section. */ |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 523 | static UWord uncook_die( const CUConst *cc, UWord die, /*OUT*/Bool *type_flag, |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 524 | Bool *alt_flag ) |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 525 | { |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 526 | *alt_flag = False; |
| 527 | *type_flag = False; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 528 | /* The use of escn_debug_{info,types}.szB seems safe to me even if |
| 529 | escn_debug_{info,types} are DiSlice_INVALID (meaning the |
| 530 | sections were not found), because DiSlice_INVALID.szB is always |
| 531 | zero. That said, it seems unlikely we'd ever get here if |
| 532 | .debug_info or .debug_types were missing. */ |
| 533 | if (die >= cc->escn_debug_info.szB) { |
| 534 | if (die >= cc->escn_debug_info.szB + cc->escn_debug_types.szB) { |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 535 | *alt_flag = True; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 536 | die -= cc->escn_debug_info.szB + cc->escn_debug_types.szB; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 537 | } else { |
| 538 | *type_flag = True; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 539 | die -= cc->escn_debug_info.szB; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 540 | } |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 541 | } |
| 542 | return die; |
| 543 | } |
| 544 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 545 | /*------------------------------------------------------------*/ |
| 546 | /*--- ---*/ |
| 547 | /*--- Helper functions for Guarded Expressions ---*/ |
| 548 | /*--- ---*/ |
| 549 | /*------------------------------------------------------------*/ |
| 550 | |
| 551 | /* Parse the location list starting at img-offset 'debug_loc_offset' |
| 552 | in .debug_loc. Results are biased with 'svma_of_referencing_CU' |
| 553 | and so I believe are correct SVMAs for the object as a whole. This |
| 554 | function allocates the UChar*, and the caller must deallocate it. |
| 555 | The resulting block is in so-called Guarded-Expression format. |
| 556 | |
| 557 | Guarded-Expression format is similar but not identical to the DWARF3 |
| 558 | location-list format. The format of each returned block is: |
| 559 | |
| 560 | UChar biasMe; |
| 561 | UChar isEnd; |
| 562 | followed by zero or more of |
| 563 | |
| 564 | (Addr aMin; Addr aMax; UShort nbytes; ..bytes..; UChar isEnd) |
| 565 | |
| 566 | '..bytes..' is an standard DWARF3 location expression which is |
| 567 | valid when aMin <= pc <= aMax (possibly after suitable biasing). |
| 568 | |
| 569 | The number of bytes in '..bytes..' is nbytes. |
| 570 | |
| 571 | The end of the sequence is marked by an isEnd == 1 value. All |
| 572 | previous isEnd values must be zero. |
| 573 | |
| 574 | biasMe is 1 if the aMin/aMax fields need this DebugInfo's |
| 575 | text_bias added before use, and 0 if the GX is this is not |
| 576 | necessary (is ready to go). |
| 577 | |
| 578 | Hence the block can be quickly parsed and is self-describing. Note |
| 579 | that aMax is 1 less than the corresponding value in a DWARF3 |
| 580 | location list. Zero length ranges, with aMax == aMin-1, are not |
| 581 | allowed. |
| 582 | */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 583 | /* 2008-sept-12: moved ML_(pp_GX) from here to d3basics.c, where |
| 584 | it more logically belongs. */ |
| 585 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 586 | |
tom | 402c9ee | 2009-03-09 09:19:03 +0000 | [diff] [blame] | 587 | /* Apply a text bias to a GX. */ |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 588 | static void bias_GX ( /*MOD*/GExpr* gx, const DebugInfo* di ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 589 | { |
| 590 | UShort nbytes; |
| 591 | UChar* p = &gx->payload[0]; |
tom | 86781fa | 2011-10-05 08:48:07 +0000 | [diff] [blame] | 592 | UChar* pA; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 593 | UChar uc; |
| 594 | uc = *p++; /*biasMe*/ |
| 595 | if (uc == 0) |
| 596 | return; |
| 597 | vg_assert(uc == 1); |
| 598 | p[-1] = 0; /* mark it as done */ |
| 599 | while (True) { |
| 600 | uc = *p++; |
| 601 | if (uc == 1) |
| 602 | break; /*isEnd*/ |
| 603 | vg_assert(uc == 0); |
sewardj | 68a2ebd | 2008-03-07 22:17:31 +0000 | [diff] [blame] | 604 | /* t-bias aMin */ |
tom | 86781fa | 2011-10-05 08:48:07 +0000 | [diff] [blame] | 605 | pA = (UChar*)p; |
| 606 | ML_(write_Addr)(pA, ML_(read_Addr)(pA) + di->text_debug_bias); |
sewardj | 68a2ebd | 2008-03-07 22:17:31 +0000 | [diff] [blame] | 607 | p += sizeof(Addr); |
| 608 | /* t-bias aMax */ |
tom | 86781fa | 2011-10-05 08:48:07 +0000 | [diff] [blame] | 609 | pA = (UChar*)p; |
| 610 | ML_(write_Addr)(pA, ML_(read_Addr)(pA) + di->text_debug_bias); |
sewardj | 68a2ebd | 2008-03-07 22:17:31 +0000 | [diff] [blame] | 611 | p += sizeof(Addr); |
| 612 | /* nbytes, and actual expression */ |
tom | 86781fa | 2011-10-05 08:48:07 +0000 | [diff] [blame] | 613 | nbytes = ML_(read_UShort)(p); p += sizeof(UShort); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 614 | p += nbytes; |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | __attribute__((noinline)) |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 619 | static GExpr* make_singleton_GX ( DiCursor block, ULong nbytes ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 620 | { |
| 621 | SizeT bytesReqd; |
| 622 | GExpr* gx; |
| 623 | UChar *p, *pstart; |
| 624 | |
| 625 | vg_assert(sizeof(UWord) == sizeof(Addr)); |
| 626 | vg_assert(nbytes <= 0xFFFF); /* else we overflow the nbytes field */ |
| 627 | bytesReqd |
| 628 | = sizeof(UChar) /*biasMe*/ + sizeof(UChar) /*!isEnd*/ |
| 629 | + sizeof(UWord) /*aMin*/ + sizeof(UWord) /*aMax*/ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 630 | + sizeof(UShort) /*nbytes*/ + (SizeT)nbytes |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 631 | + sizeof(UChar); /*isEnd*/ |
| 632 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 633 | gx = ML_(dinfo_zalloc)( "di.readdwarf3.msGX.1", |
| 634 | sizeof(GExpr) + bytesReqd ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 635 | |
| 636 | p = pstart = &gx->payload[0]; |
| 637 | |
tom | 86781fa | 2011-10-05 08:48:07 +0000 | [diff] [blame] | 638 | p = ML_(write_UChar)(p, 0); /*biasMe*/ |
| 639 | p = ML_(write_UChar)(p, 0); /*!isEnd*/ |
| 640 | p = ML_(write_Addr)(p, 0); /*aMin*/ |
| 641 | p = ML_(write_Addr)(p, ~0); /*aMax*/ |
| 642 | p = ML_(write_UShort)(p, nbytes); /*nbytes*/ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 643 | ML_(cur_read_get)(p, block, nbytes); p += nbytes; |
tom | 86781fa | 2011-10-05 08:48:07 +0000 | [diff] [blame] | 644 | p = ML_(write_UChar)(p, 1); /*isEnd*/ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 645 | |
| 646 | vg_assert( (SizeT)(p - pstart) == bytesReqd); |
| 647 | vg_assert( &gx->payload[bytesReqd] |
| 648 | == ((UChar*)gx) + sizeof(GExpr) + bytesReqd ); |
| 649 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 650 | return gx; |
| 651 | } |
| 652 | |
| 653 | __attribute__((noinline)) |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 654 | static GExpr* make_general_GX ( const CUConst* cc, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 655 | Bool td3, |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 656 | ULong debug_loc_offset, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 657 | Addr svma_of_referencing_CU ) |
| 658 | { |
| 659 | Addr base; |
| 660 | Cursor loc; |
| 661 | XArray* xa; /* XArray of UChar */ |
| 662 | GExpr* gx; |
| 663 | Word nbytes; |
| 664 | |
| 665 | vg_assert(sizeof(UWord) == sizeof(Addr)); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 666 | 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] | 667 | cc->barf("make_general_GX: .debug_loc is empty/missing"); |
| 668 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 669 | init_Cursor( &loc, cc->escn_debug_loc, 0, cc->barf, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 670 | "Overrun whilst reading .debug_loc section(2)" ); |
| 671 | set_position_of_Cursor( &loc, debug_loc_offset ); |
| 672 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 673 | TRACE_D3("make_general_GX (.debug_loc_offset = %llu, ioff = %llu) {\n", |
florian | c6e5d76 | 2015-08-05 22:27:24 +0000 | [diff] [blame] | 674 | debug_loc_offset, get_DiCursor_from_Cursor(&loc).ioff ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 675 | |
| 676 | /* Who frees this xa? It is freed before this fn exits. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 677 | xa = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.mgGX.1", |
| 678 | ML_(dinfo_free), |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 679 | sizeof(UChar) ); |
| 680 | |
| 681 | { UChar c = 1; /*biasMe*/ VG_(addBytesToXA)( xa, &c, sizeof(c) ); } |
| 682 | |
| 683 | base = 0; |
| 684 | while (True) { |
| 685 | Bool acquire; |
| 686 | UWord len; |
| 687 | /* Read a (host-)word pair. This is something of a hack since |
| 688 | the word size to read is really dictated by the ELF file; |
| 689 | however, we assume we're reading a file with the same |
| 690 | word-sizeness as the host. Reasonably enough. */ |
| 691 | UWord w1 = get_UWord( &loc ); |
| 692 | UWord w2 = get_UWord( &loc ); |
| 693 | |
| 694 | TRACE_D3(" %08lx %08lx\n", w1, w2); |
| 695 | if (w1 == 0 && w2 == 0) |
| 696 | break; /* end of list */ |
| 697 | |
| 698 | if (w1 == -1UL) { |
| 699 | /* new value for 'base' */ |
| 700 | base = w2; |
| 701 | continue; |
| 702 | } |
| 703 | |
| 704 | /* else a location expression follows */ |
| 705 | /* else enumerate [w1+base, w2+base) */ |
| 706 | /* w2 is 1 past end of range, as per D3 defn for "DW_AT_high_pc" |
| 707 | (sec 2.17.2) */ |
| 708 | if (w1 > w2) { |
| 709 | TRACE_D3("negative range is for .debug_loc expr at " |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 710 | "file offset %llu\n", |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 711 | debug_loc_offset); |
| 712 | cc->barf( "negative range in .debug_loc section" ); |
| 713 | } |
| 714 | |
| 715 | /* ignore zero length ranges */ |
| 716 | acquire = w1 < w2; |
| 717 | len = (UWord)get_UShort( &loc ); |
| 718 | |
| 719 | if (acquire) { |
| 720 | UWord w; |
| 721 | UShort s; |
| 722 | UChar c; |
| 723 | c = 0; /* !isEnd*/ |
| 724 | VG_(addBytesToXA)( xa, &c, sizeof(c) ); |
| 725 | w = w1 + base + svma_of_referencing_CU; |
| 726 | VG_(addBytesToXA)( xa, &w, sizeof(w) ); |
| 727 | w = w2 -1 + base + svma_of_referencing_CU; |
| 728 | VG_(addBytesToXA)( xa, &w, sizeof(w) ); |
| 729 | s = (UShort)len; |
| 730 | VG_(addBytesToXA)( xa, &s, sizeof(s) ); |
| 731 | } |
| 732 | |
| 733 | while (len > 0) { |
| 734 | UChar byte = get_UChar( &loc ); |
| 735 | TRACE_D3("%02x", (UInt)byte); |
| 736 | if (acquire) |
| 737 | VG_(addBytesToXA)( xa, &byte, 1 ); |
| 738 | len--; |
| 739 | } |
| 740 | TRACE_D3("\n"); |
| 741 | } |
| 742 | |
| 743 | { UChar c = 1; /*isEnd*/ VG_(addBytesToXA)( xa, &c, sizeof(c) ); } |
| 744 | |
| 745 | nbytes = VG_(sizeXA)( xa ); |
| 746 | vg_assert(nbytes >= 1); |
| 747 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 748 | gx = ML_(dinfo_zalloc)( "di.readdwarf3.mgGX.2", sizeof(GExpr) + nbytes ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 749 | VG_(memcpy)( &gx->payload[0], (UChar*)VG_(indexXA)(xa,0), nbytes ); |
| 750 | vg_assert( &gx->payload[nbytes] |
| 751 | == ((UChar*)gx) + sizeof(GExpr) + nbytes ); |
| 752 | |
| 753 | VG_(deleteXA)( xa ); |
| 754 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 755 | TRACE_D3("}\n"); |
| 756 | |
| 757 | return gx; |
| 758 | } |
| 759 | |
| 760 | |
| 761 | /*------------------------------------------------------------*/ |
| 762 | /*--- ---*/ |
| 763 | /*--- Helper functions for range lists and CU headers ---*/ |
| 764 | /*--- ---*/ |
| 765 | /*------------------------------------------------------------*/ |
| 766 | |
| 767 | /* Denotes an address range. Both aMin and aMax are included in the |
| 768 | range; hence a complete range is (0, ~0) and an empty range is any |
| 769 | (X, X-1) for X > 0.*/ |
| 770 | typedef |
| 771 | struct { Addr aMin; Addr aMax; } |
| 772 | AddrRange; |
| 773 | |
| 774 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 775 | /* Generate an arbitrary structural total ordering on |
| 776 | XArray* of AddrRange. */ |
florian | 3297124 | 2014-10-23 17:47:15 +0000 | [diff] [blame] | 777 | static Word cmp__XArrays_of_AddrRange ( const XArray* rngs1, |
| 778 | const XArray* rngs2 ) |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 779 | { |
| 780 | Word n1, n2, i; |
florian | e2800c9 | 2014-09-15 20:57:45 +0000 | [diff] [blame] | 781 | vg_assert(rngs1 && rngs2); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 782 | n1 = VG_(sizeXA)( rngs1 ); |
| 783 | n2 = VG_(sizeXA)( rngs2 ); |
| 784 | if (n1 < n2) return -1; |
| 785 | if (n1 > n2) return 1; |
| 786 | for (i = 0; i < n1; i++) { |
| 787 | AddrRange* rng1 = (AddrRange*)VG_(indexXA)( rngs1, i ); |
| 788 | AddrRange* rng2 = (AddrRange*)VG_(indexXA)( rngs2, i ); |
| 789 | if (rng1->aMin < rng2->aMin) return -1; |
| 790 | if (rng1->aMin > rng2->aMin) return 1; |
| 791 | if (rng1->aMax < rng2->aMax) return -1; |
| 792 | if (rng1->aMax > rng2->aMax) return 1; |
| 793 | } |
| 794 | return 0; |
| 795 | } |
| 796 | |
| 797 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 798 | __attribute__((noinline)) |
| 799 | static XArray* /* of AddrRange */ empty_range_list ( void ) |
| 800 | { |
| 801 | XArray* xa; /* XArray of AddrRange */ |
| 802 | /* Who frees this xa? varstack_preen() does. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 803 | xa = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.erl.1", |
| 804 | ML_(dinfo_free), |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 805 | sizeof(AddrRange) ); |
| 806 | return xa; |
| 807 | } |
| 808 | |
| 809 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 810 | __attribute__((noinline)) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 811 | static XArray* unitary_range_list ( Addr aMin, Addr aMax ) |
| 812 | { |
| 813 | XArray* xa; |
| 814 | AddrRange pair; |
| 815 | vg_assert(aMin <= aMax); |
| 816 | /* Who frees this xa? varstack_preen() does. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 817 | xa = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.url.1", |
| 818 | ML_(dinfo_free), |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 819 | sizeof(AddrRange) ); |
| 820 | pair.aMin = aMin; |
| 821 | pair.aMax = aMax; |
| 822 | VG_(addToXA)( xa, &pair ); |
| 823 | return xa; |
| 824 | } |
| 825 | |
| 826 | |
| 827 | /* Enumerate the address ranges starting at img-offset |
| 828 | 'debug_ranges_offset' in .debug_ranges. Results are biased with |
| 829 | 'svma_of_referencing_CU' and so I believe are correct SVMAs for the |
| 830 | object as a whole. This function allocates the XArray, and the |
| 831 | caller must deallocate it. */ |
| 832 | __attribute__((noinline)) |
| 833 | static XArray* /* of AddrRange */ |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 834 | get_range_list ( const CUConst* cc, |
| 835 | Bool td3, |
| 836 | UWord debug_ranges_offset, |
| 837 | Addr svma_of_referencing_CU ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 838 | { |
| 839 | Addr base; |
| 840 | Cursor ranges; |
| 841 | XArray* xa; /* XArray of AddrRange */ |
| 842 | AddrRange pair; |
| 843 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 844 | if (!ML_(sli_is_valid)(cc->escn_debug_ranges) |
| 845 | || cc->escn_debug_ranges.szB == 0) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 846 | cc->barf("get_range_list: .debug_ranges is empty/missing"); |
| 847 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 848 | init_Cursor( &ranges, cc->escn_debug_ranges, 0, cc->barf, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 849 | "Overrun whilst reading .debug_ranges section(2)" ); |
| 850 | set_position_of_Cursor( &ranges, debug_ranges_offset ); |
| 851 | |
| 852 | /* Who frees this xa? varstack_preen() does. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 853 | xa = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.grl.1", ML_(dinfo_free), |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 854 | sizeof(AddrRange) ); |
| 855 | base = 0; |
| 856 | while (True) { |
| 857 | /* Read a (host-)word pair. This is something of a hack since |
| 858 | the word size to read is really dictated by the ELF file; |
| 859 | however, we assume we're reading a file with the same |
| 860 | word-sizeness as the host. Reasonably enough. */ |
| 861 | UWord w1 = get_UWord( &ranges ); |
| 862 | UWord w2 = get_UWord( &ranges ); |
| 863 | |
| 864 | if (w1 == 0 && w2 == 0) |
| 865 | break; /* end of list. */ |
| 866 | |
| 867 | if (w1 == -1UL) { |
| 868 | /* new value for 'base' */ |
| 869 | base = w2; |
| 870 | continue; |
| 871 | } |
| 872 | |
| 873 | /* else enumerate [w1+base, w2+base) */ |
| 874 | /* w2 is 1 past end of range, as per D3 defn for "DW_AT_high_pc" |
| 875 | (sec 2.17.2) */ |
| 876 | if (w1 > w2) |
| 877 | cc->barf( "negative range in .debug_ranges section" ); |
| 878 | if (w1 < w2) { |
| 879 | pair.aMin = w1 + base + svma_of_referencing_CU; |
| 880 | pair.aMax = w2 - 1 + base + svma_of_referencing_CU; |
| 881 | vg_assert(pair.aMin <= pair.aMax); |
| 882 | VG_(addToXA)( xa, &pair ); |
| 883 | } |
| 884 | } |
| 885 | return xa; |
| 886 | } |
| 887 | |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 888 | #define VARSZ_FORM 0xffffffff |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 889 | static UInt get_Form_szB (const CUConst* cc, DW_FORM form ); |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 890 | |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 891 | /* Initialises the hash table of abbreviations. |
| 892 | We do a single scan of the abbv slice to parse and |
| 893 | build all abbreviations, for the following reasons: |
| 894 | * all or most abbreviations will be needed in any case |
| 895 | (at least for var-info reading). |
| 896 | * re-reading each time an abbreviation causes a lot of calls |
| 897 | to get_ULEB128. |
| 898 | * a CU should not have many abbreviations. */ |
| 899 | static void init_ht_abbvs (CUConst* cc, |
| 900 | Bool td3) |
| 901 | { |
| 902 | Cursor c; |
| 903 | g_abbv *ta; // temporary abbreviation, reallocated if needed. |
| 904 | UInt ta_nf_maxE; // max nr of pairs in ta.nf[], doubled when reallocated. |
| 905 | UInt ta_nf_n; // nr of pairs in ta->nf that are initialised. |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 906 | g_abbv *ht_ta; // abbv to insert in hash table. |
| 907 | Int i; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 908 | |
| 909 | #define SZ_G_ABBV(_nf_szE) (sizeof(g_abbv) + _nf_szE * sizeof(name_form)) |
| 910 | |
| 911 | ta_nf_maxE = 10; // starting with enough for 9 pairs+terminating pair. |
| 912 | ta = ML_(dinfo_zalloc) ("di.readdwarf3.ht_ta_nf", SZ_G_ABBV(ta_nf_maxE)); |
| 913 | cc->ht_abbvs = VG_(HT_construct) ("di.readdwarf3.ht_abbvs"); |
| 914 | |
| 915 | init_Cursor( &c, cc->debug_abbv, 0, cc->barf, |
| 916 | "Overrun whilst parsing .debug_abbrev section(2)" ); |
| 917 | while (True) { |
| 918 | ta->abbv_code = get_ULEB128( &c ); |
| 919 | if (ta->abbv_code == 0) break; /* end of the table */ |
| 920 | |
| 921 | ta->atag = get_ULEB128( &c ); |
| 922 | ta->has_children = get_UChar( &c ); |
| 923 | ta_nf_n = 0; |
| 924 | while (True) { |
| 925 | if (ta_nf_n >= ta_nf_maxE) { |
| 926 | g_abbv *old_ta = ta; |
| 927 | ta = ML_(dinfo_zalloc) ("di.readdwarf3.ht_ta_nf", |
| 928 | SZ_G_ABBV(2 * ta_nf_maxE)); |
| 929 | ta_nf_maxE = 2 * ta_nf_maxE; |
| 930 | VG_(memcpy) (ta, old_ta, SZ_G_ABBV(ta_nf_n)); |
| 931 | ML_(dinfo_free) (old_ta); |
| 932 | } |
| 933 | ta->nf[ta_nf_n].at_name = get_ULEB128( &c ); |
| 934 | ta->nf[ta_nf_n].at_form = get_ULEB128( &c ); |
| 935 | if (ta->nf[ta_nf_n].at_name == 0 && ta->nf[ta_nf_n].at_form == 0) { |
| 936 | ta_nf_n++; |
| 937 | break; |
| 938 | } |
| 939 | ta_nf_n++; |
| 940 | } |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 941 | |
| 942 | // Initialises the skip_szB/next_nf elements : an element at position |
| 943 | // i must contain the sum of its own size + the sizes of all elements |
| 944 | // following i till either the next variable size element, the next |
| 945 | // sibling element or the end of the DIE. |
| 946 | ta->nf[ta_nf_n - 1].skip_szB = 0; |
| 947 | ta->nf[ta_nf_n - 1].next_nf = 0; |
| 948 | for (i = ta_nf_n - 2; i >= 0; i--) { |
| 949 | const UInt form_szB = get_Form_szB (cc, (DW_FORM)ta->nf[i].at_form); |
| 950 | |
| 951 | if (ta->nf[i+1].at_name == DW_AT_sibling |
| 952 | || ta->nf[i+1].skip_szB == VARSZ_FORM) { |
| 953 | ta->nf[i].skip_szB = form_szB; |
| 954 | ta->nf[i].next_nf = i+1; |
| 955 | } else if (form_szB == VARSZ_FORM) { |
| 956 | ta->nf[i].skip_szB = form_szB; |
| 957 | ta->nf[i].next_nf = i+1; |
| 958 | } else { |
| 959 | ta->nf[i].skip_szB = ta->nf[i+1].skip_szB + form_szB; |
| 960 | ta->nf[i].next_nf = ta->nf[i+1].next_nf; |
| 961 | } |
| 962 | } |
| 963 | |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 964 | ht_ta = ML_(dinfo_zalloc) ("di.readdwarf3.ht_ta", SZ_G_ABBV(ta_nf_n)); |
| 965 | VG_(memcpy) (ht_ta, ta, SZ_G_ABBV(ta_nf_n)); |
| 966 | VG_(HT_add_node) ( cc->ht_abbvs, ht_ta ); |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 967 | if (TD3) { |
florian | c6e5d76 | 2015-08-05 22:27:24 +0000 | [diff] [blame] | 968 | TRACE_D3(" Adding abbv_code %lu TAG %s [%s] nf %u ", |
| 969 | ht_ta->abbv_code, ML_(pp_DW_TAG)(ht_ta->atag), |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 970 | ML_(pp_DW_children)(ht_ta->has_children), |
| 971 | ta_nf_n); |
| 972 | TRACE_D3(" "); |
| 973 | for (i = 0; i < ta_nf_n; i++) |
| 974 | TRACE_D3("[%u,%u] ", ta->nf[i].skip_szB, ta->nf[i].next_nf); |
| 975 | TRACE_D3("\n"); |
| 976 | } |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 977 | } |
| 978 | |
| 979 | ML_(dinfo_free) (ta); |
| 980 | #undef SZ_G_ABBV |
| 981 | } |
| 982 | |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 983 | static g_abbv* get_abbv (const CUConst* cc, ULong abbv_code) |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 984 | { |
| 985 | g_abbv *abbv; |
| 986 | |
| 987 | abbv = VG_(HT_lookup) (cc->ht_abbvs, abbv_code); |
| 988 | if (!abbv) |
| 989 | cc->barf ("abbv_code not found in ht_abbvs table"); |
| 990 | return abbv; |
| 991 | } |
| 992 | |
| 993 | /* Free the memory allocated in CUConst. */ |
| 994 | static void clear_CUConst (CUConst* cc) |
| 995 | { |
| 996 | VG_(HT_destruct) ( cc->ht_abbvs, ML_(dinfo_free)); |
| 997 | cc->ht_abbvs = NULL; |
| 998 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 999 | |
| 1000 | /* Parse the Compilation Unit header indicated at 'c' and |
| 1001 | initialise 'cc' accordingly. */ |
| 1002 | static __attribute__((noinline)) |
| 1003 | void parse_CU_Header ( /*OUT*/CUConst* cc, |
| 1004 | Bool td3, |
| 1005 | Cursor* c, |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1006 | DiSlice escn_debug_abbv, |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 1007 | Bool type_unit, |
| 1008 | Bool alt_info ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1009 | { |
| 1010 | UChar address_size; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1011 | ULong debug_abbrev_offset; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1012 | |
| 1013 | VG_(memset)(cc, 0, sizeof(*cc)); |
| 1014 | vg_assert(c && c->barf); |
| 1015 | cc->barf = c->barf; |
| 1016 | |
| 1017 | /* initial_length field */ |
| 1018 | cc->unit_length |
| 1019 | = get_Initial_Length( &cc->is_dw64, c, |
| 1020 | "parse_CU_Header: invalid initial-length field" ); |
| 1021 | |
florian | c6e5d76 | 2015-08-05 22:27:24 +0000 | [diff] [blame] | 1022 | TRACE_D3(" Length: %llu\n", cc->unit_length ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1023 | |
| 1024 | /* version */ |
| 1025 | cc->version = get_UShort( c ); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1026 | if (cc->version != 2 && cc->version != 3 && cc->version != 4) |
| 1027 | cc->barf( "parse_CU_Header: is neither DWARF2 nor DWARF3 nor DWARF4" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1028 | TRACE_D3(" Version: %d\n", (Int)cc->version ); |
| 1029 | |
| 1030 | /* debug_abbrev_offset */ |
| 1031 | debug_abbrev_offset = get_Dwarfish_UWord( c, cc->is_dw64 ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1032 | if (debug_abbrev_offset >= escn_debug_abbv.szB) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1033 | cc->barf( "parse_CU_Header: invalid debug_abbrev_offset" ); |
florian | c6e5d76 | 2015-08-05 22:27:24 +0000 | [diff] [blame] | 1034 | TRACE_D3(" Abbrev Offset: %llu\n", debug_abbrev_offset ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1035 | |
| 1036 | /* address size. If this isn't equal to the host word size, just |
| 1037 | give up. This makes it safe to assume elsewhere that |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 1038 | DW_FORM_addr and DW_FORM_ref_addr can be treated as a host |
| 1039 | word. */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1040 | address_size = get_UChar( c ); |
| 1041 | if (address_size != sizeof(void*)) |
| 1042 | cc->barf( "parse_CU_Header: invalid address_size" ); |
| 1043 | TRACE_D3(" Pointer Size: %d\n", (Int)address_size ); |
| 1044 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1045 | cc->is_type_unit = type_unit; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 1046 | cc->is_alt_info = alt_info; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1047 | |
| 1048 | if (type_unit) { |
| 1049 | cc->type_signature = get_ULong( c ); |
| 1050 | cc->type_offset = get_Dwarfish_UWord( c, cc->is_dw64 ); |
| 1051 | } |
| 1052 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1053 | /* Set up cc->debug_abbv to point to the relevant table for this |
| 1054 | CU. Set its .szB so that at least we can't read off the end of |
| 1055 | the debug_abbrev section -- potentially (and quite likely) too |
| 1056 | big, if this isn't the last table in the section, but at least |
| 1057 | it's safe. |
| 1058 | |
| 1059 | This amounts to taking debug_abbv_escn and moving the start |
| 1060 | position along by debug_abbrev_offset bytes, hence forming a |
| 1061 | smaller DiSlice which has the same end point. Since we checked |
| 1062 | just above that debug_abbrev_offset is less than the size of |
| 1063 | debug_abbv_escn, this should leave us with a nonempty slice. */ |
| 1064 | vg_assert(debug_abbrev_offset < escn_debug_abbv.szB); |
| 1065 | cc->debug_abbv = escn_debug_abbv; |
| 1066 | cc->debug_abbv.ioff += debug_abbrev_offset; |
| 1067 | cc->debug_abbv.szB -= debug_abbrev_offset; |
| 1068 | |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 1069 | init_ht_abbvs(cc, td3); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1070 | } |
| 1071 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1072 | /* This represents a single signatured type. It maps a type signature |
| 1073 | (a ULong) to a cooked DIE offset. Objects of this type are stored |
| 1074 | in the type signature hash table. */ |
| 1075 | typedef |
| 1076 | struct D3SignatureType { |
| 1077 | struct D3SignatureType *next; |
| 1078 | UWord data; |
| 1079 | ULong type_signature; |
| 1080 | UWord die; |
| 1081 | } |
| 1082 | D3SignatureType; |
| 1083 | |
| 1084 | /* Record a signatured type in the hash table. */ |
florian | 09a4c79 | 2014-10-18 10:58:05 +0000 | [diff] [blame] | 1085 | static void record_signatured_type ( VgHashTable *tab, |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1086 | ULong type_signature, |
| 1087 | UWord die ) |
| 1088 | { |
| 1089 | D3SignatureType *dstype = ML_(dinfo_zalloc) ( "di.readdwarf3.sigtype", |
| 1090 | sizeof(D3SignatureType) ); |
| 1091 | dstype->data = (UWord) type_signature; |
| 1092 | dstype->type_signature = type_signature; |
| 1093 | dstype->die = die; |
| 1094 | VG_(HT_add_node) ( tab, dstype ); |
| 1095 | } |
| 1096 | |
| 1097 | /* Given a type signature hash table and a type signature, return the |
| 1098 | cooked DIE offset of the type. If the type cannot be found, call |
| 1099 | BARF. */ |
florian | 09a4c79 | 2014-10-18 10:58:05 +0000 | [diff] [blame] | 1100 | static UWord lookup_signatured_type ( const VgHashTable *tab, |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1101 | ULong type_signature, |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 1102 | void (*barf)( const HChar* ) __attribute__((noreturn)) ) |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1103 | { |
| 1104 | D3SignatureType *dstype = VG_(HT_lookup) ( tab, (UWord) type_signature ); |
| 1105 | /* This may be unwarranted chumminess with the hash table |
| 1106 | implementation. */ |
| 1107 | while ( dstype != NULL && dstype->type_signature != type_signature) |
| 1108 | dstype = dstype->next; |
| 1109 | if (dstype == NULL) { |
| 1110 | barf("lookup_signatured_type: could not find signatured type"); |
| 1111 | /*NOTREACHED*/ |
| 1112 | vg_assert(0); |
| 1113 | } |
| 1114 | return dstype->die; |
| 1115 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1116 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1117 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1118 | /* Represents Form data. If szB is 1/2/4/8 then the result is in the |
| 1119 | lowest 1/2/4/8 bytes of u.val. If szB is zero or negative then the |
| 1120 | result is an image section beginning at u.cur and with size -szB. |
| 1121 | No other szB values are allowed. */ |
| 1122 | typedef |
| 1123 | struct { |
| 1124 | Long szB; // 1, 2, 4, 8 or non-positive values only. |
| 1125 | union { ULong val; DiCursor cur; } u; |
| 1126 | } |
| 1127 | FormContents; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1128 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1129 | /* From 'c', get the Form data into 'cts'. Either it gets a 1/2/4/8 |
| 1130 | byte scalar value, or (a reference to) zero or more bytes starting |
| 1131 | at a DiCursor.*/ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1132 | static |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1133 | void get_Form_contents ( /*OUT*/FormContents* cts, |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 1134 | const CUConst* cc, Cursor* c, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1135 | Bool td3, DW_FORM form ) |
| 1136 | { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1137 | VG_(bzero_inline)(cts, sizeof(*cts)); |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 1138 | // !!! keep switch in sync with get_Form_szB. The nr of characters read below |
| 1139 | // must be computed similarly in get_Form_szB. |
| 1140 | // The consistency is verified in trace_DIE. |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1141 | switch (form) { |
| 1142 | case DW_FORM_data1: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1143 | cts->u.val = (ULong)(UChar)get_UChar(c); |
| 1144 | cts->szB = 1; |
| 1145 | TRACE_D3("%u", (UInt)cts->u.val); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1146 | break; |
| 1147 | case DW_FORM_data2: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1148 | cts->u.val = (ULong)(UShort)get_UShort(c); |
| 1149 | cts->szB = 2; |
| 1150 | TRACE_D3("%u", (UInt)cts->u.val); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1151 | break; |
| 1152 | case DW_FORM_data4: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1153 | cts->u.val = (ULong)(UInt)get_UInt(c); |
| 1154 | cts->szB = 4; |
| 1155 | TRACE_D3("%u", (UInt)cts->u.val); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1156 | break; |
sewardj | 0b5bf91 | 2008-03-07 20:07:58 +0000 | [diff] [blame] | 1157 | case DW_FORM_data8: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1158 | cts->u.val = get_ULong(c); |
| 1159 | cts->szB = 8; |
| 1160 | TRACE_D3("%llu", cts->u.val); |
sewardj | 0b5bf91 | 2008-03-07 20:07:58 +0000 | [diff] [blame] | 1161 | break; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1162 | case DW_FORM_sec_offset: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1163 | cts->u.val = (ULong)get_Dwarfish_UWord( c, cc->is_dw64 ); |
| 1164 | cts->szB = cc->is_dw64 ? 8 : 4; |
| 1165 | TRACE_D3("%llu", cts->u.val); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1166 | break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1167 | case DW_FORM_sdata: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1168 | cts->u.val = (ULong)(Long)get_SLEB128(c); |
| 1169 | cts->szB = 8; |
florian | c6e5d76 | 2015-08-05 22:27:24 +0000 | [diff] [blame] | 1170 | TRACE_D3("%llu", cts->u.val); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1171 | break; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1172 | case DW_FORM_udata: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1173 | cts->u.val = (ULong)(Long)get_ULEB128(c); |
| 1174 | cts->szB = 8; |
florian | c6e5d76 | 2015-08-05 22:27:24 +0000 | [diff] [blame] | 1175 | TRACE_D3("%llu", cts->u.val); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1176 | break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1177 | case DW_FORM_addr: |
| 1178 | /* note, this is a hack. DW_FORM_addr is defined as getting |
| 1179 | a word the size of the target machine as defined by the |
| 1180 | address_size field in the CU Header. However, |
| 1181 | parse_CU_Header() rejects all inputs except those for |
| 1182 | which address_size == sizeof(Word), hence we can just |
| 1183 | treat it as a (host) Word. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1184 | cts->u.val = (ULong)(UWord)get_UWord(c); |
| 1185 | cts->szB = sizeof(UWord); |
| 1186 | TRACE_D3("0x%lx", (UWord)cts->u.val); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1187 | break; |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 1188 | |
| 1189 | case DW_FORM_ref_addr: |
| 1190 | /* We make the same word-size assumption as DW_FORM_addr. */ |
| 1191 | /* What does this really mean? From D3 Sec 7.5.4, |
| 1192 | description of "reference", it would appear to reference |
| 1193 | some other DIE, by specifying the offset from the |
| 1194 | beginning of a .debug_info section. The D3 spec mentions |
| 1195 | that this might be in some other shared object and |
| 1196 | executable. But I don't see how the name of the other |
| 1197 | object/exe is specified. |
| 1198 | |
| 1199 | At least for the DW_FORM_ref_addrs created by icc11, the |
| 1200 | references seem to be within the same object/executable. |
| 1201 | So for the moment we merely range-check, to see that they |
| 1202 | actually do specify a plausible offset within this |
| 1203 | object's .debug_info, and return the value unchanged. |
sewardj | ee93cdb | 2012-04-29 11:35:37 +0000 | [diff] [blame] | 1204 | |
| 1205 | In DWARF 2, DW_FORM_ref_addr is address-sized, but in |
| 1206 | DWARF 3 and later, it is offset-sized. |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 1207 | */ |
sewardj | ee93cdb | 2012-04-29 11:35:37 +0000 | [diff] [blame] | 1208 | if (cc->version == 2) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1209 | cts->u.val = (ULong)(UWord)get_UWord(c); |
| 1210 | cts->szB = sizeof(UWord); |
sewardj | ee93cdb | 2012-04-29 11:35:37 +0000 | [diff] [blame] | 1211 | } else { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1212 | cts->u.val = get_Dwarfish_UWord(c, cc->is_dw64); |
| 1213 | cts->szB = cc->is_dw64 ? sizeof(ULong) : sizeof(UInt); |
sewardj | ee93cdb | 2012-04-29 11:35:37 +0000 | [diff] [blame] | 1214 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1215 | TRACE_D3("0x%lx", (UWord)cts->u.val); |
| 1216 | if (0) VG_(printf)("DW_FORM_ref_addr 0x%lx\n", (UWord)cts->u.val); |
| 1217 | if (/* the following is surely impossible, but ... */ |
| 1218 | !ML_(sli_is_valid)(cc->escn_debug_info) |
| 1219 | || cts->u.val >= (ULong)cc->escn_debug_info.szB) { |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 1220 | /* Hmm. Offset is nonsensical for this object's .debug_info |
| 1221 | section. Be safe and reject it. */ |
| 1222 | cc->barf("get_Form_contents: DW_FORM_ref_addr points " |
| 1223 | "outside .debug_info"); |
| 1224 | } |
| 1225 | break; |
| 1226 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1227 | case DW_FORM_strp: { |
| 1228 | /* this is an offset into .debug_str */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1229 | UWord uw = (UWord)get_Dwarfish_UWord( c, cc->is_dw64 ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1230 | if (!ML_(sli_is_valid)(cc->escn_debug_str) |
| 1231 | || uw >= cc->escn_debug_str.szB) |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 1232 | cc->barf("get_Form_contents: DW_FORM_strp " |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1233 | "points outside .debug_str"); |
| 1234 | /* FIXME: check the entire string lies inside debug_str, |
| 1235 | not just the first byte of it. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1236 | DiCursor str |
| 1237 | = ML_(cur_plus)( ML_(cur_from_sli)(cc->escn_debug_str), uw ); |
philippe | e0bd591 | 2014-06-21 09:48:17 +0000 | [diff] [blame] | 1238 | if (TD3) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1239 | HChar* tmp = ML_(cur_read_strdup)(str, "di.getFC.1"); |
| 1240 | TRACE_D3("(indirect string, offset: 0x%lx): %s", uw, tmp); |
| 1241 | ML_(dinfo_free)(tmp); |
| 1242 | } |
| 1243 | cts->u.cur = str; |
| 1244 | cts->szB = - (Long)(1 + (ULong)ML_(cur_strlen)(str)); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1245 | break; |
| 1246 | } |
| 1247 | case DW_FORM_string: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1248 | DiCursor str = get_AsciiZ(c); |
philippe | e0bd591 | 2014-06-21 09:48:17 +0000 | [diff] [blame] | 1249 | if (TD3) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1250 | HChar* tmp = ML_(cur_read_strdup)(str, "di.getFC.2"); |
| 1251 | TRACE_D3("%s", tmp); |
| 1252 | ML_(dinfo_free)(tmp); |
| 1253 | } |
| 1254 | cts->u.cur = str; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1255 | /* strlen is safe because get_AsciiZ already 'vetted' the |
| 1256 | entire string */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1257 | cts->szB = - (Long)(1 + (ULong)ML_(cur_strlen)(str)); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1258 | break; |
| 1259 | } |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1260 | case DW_FORM_ref1: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1261 | UChar u8 = get_UChar(c); |
| 1262 | UWord res = cc->cu_start_offset + (UWord)u8; |
| 1263 | cts->u.val = (ULong)res; |
| 1264 | cts->szB = sizeof(UWord); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1265 | TRACE_D3("<%lx>", res); |
| 1266 | break; |
| 1267 | } |
| 1268 | case DW_FORM_ref2: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1269 | UShort u16 = get_UShort(c); |
| 1270 | UWord res = cc->cu_start_offset + (UWord)u16; |
| 1271 | cts->u.val = (ULong)res; |
| 1272 | cts->szB = sizeof(UWord); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1273 | TRACE_D3("<%lx>", res); |
| 1274 | break; |
| 1275 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1276 | case DW_FORM_ref4: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1277 | UInt u32 = get_UInt(c); |
| 1278 | UWord res = cc->cu_start_offset + (UWord)u32; |
| 1279 | cts->u.val = (ULong)res; |
| 1280 | cts->szB = sizeof(UWord); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1281 | TRACE_D3("<%lx>", res); |
| 1282 | break; |
| 1283 | } |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1284 | case DW_FORM_ref8: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1285 | ULong u64 = get_ULong(c); |
| 1286 | UWord res = cc->cu_start_offset + (UWord)u64; |
| 1287 | cts->u.val = (ULong)res; |
| 1288 | cts->szB = sizeof(UWord); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1289 | TRACE_D3("<%lx>", res); |
| 1290 | break; |
| 1291 | } |
| 1292 | case DW_FORM_ref_udata: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1293 | ULong u64 = get_ULEB128(c); |
| 1294 | UWord res = cc->cu_start_offset + (UWord)u64; |
| 1295 | cts->u.val = (ULong)res; |
| 1296 | cts->szB = sizeof(UWord); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1297 | TRACE_D3("<%lx>", res); |
| 1298 | break; |
| 1299 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1300 | case DW_FORM_flag: { |
| 1301 | UChar u8 = get_UChar(c); |
| 1302 | TRACE_D3("%u", (UInt)u8); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1303 | cts->u.val = (ULong)u8; |
| 1304 | cts->szB = 1; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1305 | break; |
| 1306 | } |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1307 | case DW_FORM_flag_present: |
| 1308 | TRACE_D3("1"); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1309 | cts->u.val = 1; |
| 1310 | cts->szB = 1; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1311 | break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1312 | case DW_FORM_block1: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1313 | ULong u64b; |
| 1314 | ULong u64 = (ULong)get_UChar(c); |
| 1315 | DiCursor block = get_DiCursor_from_Cursor(c); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1316 | TRACE_D3("%llu byte block: ", u64); |
| 1317 | for (u64b = u64; u64b > 0; u64b--) { |
| 1318 | UChar u8 = get_UChar(c); |
| 1319 | TRACE_D3("%x ", (UInt)u8); |
| 1320 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1321 | cts->u.cur = block; |
| 1322 | cts->szB = - (Long)u64; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1323 | break; |
| 1324 | } |
sewardj | b2250d3 | 2008-10-23 11:13:05 +0000 | [diff] [blame] | 1325 | case DW_FORM_block2: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1326 | ULong u64b; |
| 1327 | ULong u64 = (ULong)get_UShort(c); |
| 1328 | DiCursor block = get_DiCursor_from_Cursor(c); |
sewardj | b2250d3 | 2008-10-23 11:13:05 +0000 | [diff] [blame] | 1329 | TRACE_D3("%llu byte block: ", u64); |
| 1330 | for (u64b = u64; u64b > 0; u64b--) { |
| 1331 | UChar u8 = get_UChar(c); |
| 1332 | TRACE_D3("%x ", (UInt)u8); |
| 1333 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1334 | cts->u.cur = block; |
| 1335 | cts->szB = - (Long)u64; |
sewardj | b2250d3 | 2008-10-23 11:13:05 +0000 | [diff] [blame] | 1336 | break; |
| 1337 | } |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1338 | case DW_FORM_block4: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1339 | ULong u64b; |
| 1340 | ULong u64 = (ULong)get_UInt(c); |
| 1341 | DiCursor block = get_DiCursor_from_Cursor(c); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1342 | TRACE_D3("%llu byte block: ", u64); |
| 1343 | for (u64b = u64; u64b > 0; u64b--) { |
| 1344 | UChar u8 = get_UChar(c); |
| 1345 | TRACE_D3("%x ", (UInt)u8); |
| 1346 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1347 | cts->u.cur = block; |
| 1348 | cts->szB = - (Long)u64; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1349 | break; |
| 1350 | } |
| 1351 | case DW_FORM_exprloc: |
| 1352 | case DW_FORM_block: { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1353 | ULong u64b; |
| 1354 | ULong u64 = (ULong)get_ULEB128(c); |
| 1355 | DiCursor block = get_DiCursor_from_Cursor(c); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1356 | TRACE_D3("%llu byte block: ", u64); |
| 1357 | for (u64b = u64; u64b > 0; u64b--) { |
| 1358 | UChar u8 = get_UChar(c); |
| 1359 | TRACE_D3("%x ", (UInt)u8); |
| 1360 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1361 | cts->u.cur = block; |
| 1362 | cts->szB = - (Long)u64; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1363 | break; |
| 1364 | } |
| 1365 | case DW_FORM_ref_sig8: { |
| 1366 | ULong u64b; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1367 | ULong signature = get_ULong (c); |
| 1368 | ULong work = signature; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1369 | TRACE_D3("8 byte signature: "); |
| 1370 | for (u64b = 8; u64b > 0; u64b--) { |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1371 | UChar u8 = work & 0xff; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1372 | TRACE_D3("%x ", (UInt)u8); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 1373 | work >>= 8; |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1374 | } |
philippe | bb861b5 | 2014-10-07 20:35:06 +0000 | [diff] [blame] | 1375 | |
| 1376 | /* cc->signature_types is only built/initialised when |
| 1377 | VG_(clo_read_var_info) is set. In this case, |
| 1378 | the DW_FORM_ref_sig8 can be looked up. |
| 1379 | But we can also arrive here when only reading inline info |
| 1380 | and VG_(clo_trace_symtab) is set. In such a case, |
| 1381 | we cannot lookup the DW_FORM_ref_sig8, we rather assign |
| 1382 | a dummy value. This is a kludge, but otherwise, |
| 1383 | the 'dwarf inline info reader' tracing would have to |
| 1384 | do type processing/reading. It is better to avoid |
| 1385 | adding significant 'real' processing only due to tracing. */ |
| 1386 | if (VG_(clo_read_var_info)) { |
| 1387 | /* Due to the way that the hash table is constructed, the |
| 1388 | resulting DIE offset here is already "cooked". See |
| 1389 | cook_die_using_form. */ |
| 1390 | cts->u.val = lookup_signatured_type (cc->signature_types, signature, |
| 1391 | c->barf); |
| 1392 | } else { |
| 1393 | vg_assert (td3); |
| 1394 | vg_assert (VG_(clo_read_inline_info)); |
| 1395 | TRACE_D3("<not dereferencing signature type>"); |
| 1396 | cts->u.val = 0; /* Assign a dummy/rubbish value */ |
| 1397 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1398 | cts->szB = sizeof(UWord); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1399 | break; |
| 1400 | } |
| 1401 | case DW_FORM_indirect: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1402 | get_Form_contents (cts, cc, c, td3, (DW_FORM)get_ULEB128(c)); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1403 | return; |
| 1404 | |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 1405 | case DW_FORM_GNU_ref_alt: |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1406 | cts->u.val = get_Dwarfish_UWord(c, cc->is_dw64); |
| 1407 | cts->szB = cc->is_dw64 ? sizeof(ULong) : sizeof(UInt); |
| 1408 | TRACE_D3("0x%lx", (UWord)cts->u.val); |
| 1409 | if (0) VG_(printf)("DW_FORM_GNU_ref_alt 0x%lx\n", (UWord)cts->u.val); |
| 1410 | if (/* the following is surely impossible, but ... */ |
mjw | 3e49e4c | 2014-09-03 18:35:28 +0000 | [diff] [blame] | 1411 | !ML_(sli_is_valid)(cc->escn_debug_info_alt)) |
| 1412 | cc->barf("get_Form_contents: DW_FORM_GNU_ref_addr used, " |
| 1413 | "but no alternate .debug_info"); |
| 1414 | else if (cts->u.val >= (ULong)cc->escn_debug_info_alt.szB) { |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 1415 | /* Hmm. Offset is nonsensical for this object's .debug_info |
| 1416 | section. Be safe and reject it. */ |
mjw | 3e49e4c | 2014-09-03 18:35:28 +0000 | [diff] [blame] | 1417 | cc->barf("get_Form_contents: DW_FORM_GNU_ref_addr points " |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 1418 | "outside alternate .debug_info"); |
| 1419 | } |
| 1420 | break; |
| 1421 | |
| 1422 | case DW_FORM_GNU_strp_alt: { |
| 1423 | /* this is an offset into alternate .debug_str */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1424 | SizeT uw = (UWord)get_Dwarfish_UWord( c, cc->is_dw64 ); |
mjw | 3e49e4c | 2014-09-03 18:35:28 +0000 | [diff] [blame] | 1425 | if (!ML_(sli_is_valid)(cc->escn_debug_str_alt)) |
| 1426 | cc->barf("get_Form_contents: DW_FORM_GNU_strp_alt used, " |
| 1427 | "but no alternate .debug_str"); |
| 1428 | else if (uw >= cc->escn_debug_str_alt.szB) |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 1429 | cc->barf("get_Form_contents: DW_FORM_GNU_strp_alt " |
| 1430 | "points outside alternate .debug_str"); |
| 1431 | /* FIXME: check the entire string lies inside debug_str, |
| 1432 | not just the first byte of it. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1433 | DiCursor str |
| 1434 | = ML_(cur_plus)( ML_(cur_from_sli)(cc->escn_debug_str_alt), uw); |
philippe | e0bd591 | 2014-06-21 09:48:17 +0000 | [diff] [blame] | 1435 | if (TD3) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1436 | HChar* tmp = ML_(cur_read_strdup)(str, "di.getFC.3"); |
| 1437 | TRACE_D3("(indirect alt string, offset: 0x%lx): %s", uw, tmp); |
| 1438 | ML_(dinfo_free)(tmp); |
| 1439 | } |
| 1440 | cts->u.cur = str; |
| 1441 | cts->szB = - (Long)(1 + (ULong)ML_(cur_strlen)(str)); |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 1442 | break; |
| 1443 | } |
| 1444 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1445 | default: |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 1446 | VG_(printf)( |
florian | c6e5d76 | 2015-08-05 22:27:24 +0000 | [diff] [blame] | 1447 | "get_Form_contents: unhandled %u (%s) at <%llx>\n", |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 1448 | form, ML_(pp_DW_FORM)(form), get_position_of_Cursor(c)); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1449 | c->barf("get_Form_contents: unhandled DW_FORM"); |
| 1450 | } |
| 1451 | } |
| 1452 | |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 1453 | static inline UInt sizeof_Dwarfish_UWord (Bool is_dw64) |
| 1454 | { |
| 1455 | if (is_dw64) |
| 1456 | return sizeof(ULong); |
| 1457 | else |
| 1458 | return sizeof(UInt); |
| 1459 | } |
| 1460 | |
| 1461 | #define VARSZ_FORM 0xffffffff |
| 1462 | /* If the form is a fixed length form, return the nr of bytes for this form. |
| 1463 | If the form is a variable length form, return VARSZ_FORM. */ |
| 1464 | static |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 1465 | UInt get_Form_szB (const CUConst* cc, DW_FORM form ) |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 1466 | { |
| 1467 | // !!! keep switch in sync with get_Form_contents : the nr of bytes |
| 1468 | // read from a cursor by get_Form_contents must be returned by |
| 1469 | // the below switch. |
| 1470 | // The consistency is verified in trace_DIE. |
| 1471 | switch (form) { |
| 1472 | case DW_FORM_data1: return 1; |
| 1473 | case DW_FORM_data2: return 2; |
| 1474 | case DW_FORM_data4: return 4; |
| 1475 | case DW_FORM_data8: return 8; |
| 1476 | case DW_FORM_sec_offset: |
| 1477 | if (cc->is_dw64) |
| 1478 | return 8; |
| 1479 | else |
| 1480 | return 4; |
| 1481 | case DW_FORM_sdata: |
| 1482 | return VARSZ_FORM; |
| 1483 | case DW_FORM_udata: |
| 1484 | return VARSZ_FORM; |
| 1485 | case DW_FORM_addr: // See hack in get_Form_contents |
| 1486 | return sizeof(UWord); |
| 1487 | case DW_FORM_ref_addr: // See hack in get_Form_contents |
| 1488 | if (cc->version == 2) |
| 1489 | return sizeof(UWord); |
| 1490 | else |
| 1491 | return sizeof_Dwarfish_UWord (cc->is_dw64); |
| 1492 | case DW_FORM_strp: |
| 1493 | return sizeof_Dwarfish_UWord (cc->is_dw64); |
| 1494 | case DW_FORM_string: |
| 1495 | return VARSZ_FORM; |
| 1496 | case DW_FORM_ref1: |
| 1497 | return 1; |
| 1498 | case DW_FORM_ref2: |
| 1499 | return 2; |
| 1500 | case DW_FORM_ref4: |
| 1501 | return 4; |
| 1502 | case DW_FORM_ref8: |
| 1503 | return 8; |
| 1504 | case DW_FORM_ref_udata: |
| 1505 | return VARSZ_FORM; |
| 1506 | case DW_FORM_flag: |
| 1507 | return 1; |
| 1508 | case DW_FORM_flag_present: |
| 1509 | return 0; // !!! special case, no data. |
| 1510 | case DW_FORM_block1: |
| 1511 | return VARSZ_FORM; |
| 1512 | case DW_FORM_block2: |
| 1513 | return VARSZ_FORM; |
| 1514 | case DW_FORM_block4: |
| 1515 | return VARSZ_FORM; |
| 1516 | case DW_FORM_exprloc: |
| 1517 | case DW_FORM_block: |
| 1518 | return VARSZ_FORM; |
| 1519 | case DW_FORM_ref_sig8: |
philippe | d4636ab | 2014-10-06 21:46:43 +0000 | [diff] [blame] | 1520 | return 8; |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 1521 | case DW_FORM_indirect: |
| 1522 | return VARSZ_FORM; |
| 1523 | case DW_FORM_GNU_ref_alt: |
| 1524 | return sizeof_Dwarfish_UWord(cc->is_dw64); |
| 1525 | case DW_FORM_GNU_strp_alt: |
| 1526 | return sizeof_Dwarfish_UWord(cc->is_dw64); |
| 1527 | default: |
| 1528 | VG_(printf)( |
florian | c6e5d76 | 2015-08-05 22:27:24 +0000 | [diff] [blame] | 1529 | "get_Form_szB: unhandled %u (%s)\n", |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 1530 | form, ML_(pp_DW_FORM)(form)); |
| 1531 | cc->barf("get_Form_contents: unhandled DW_FORM"); |
| 1532 | } |
| 1533 | } |
| 1534 | |
| 1535 | /* Skip a DIE as described by abbv. |
| 1536 | If the DIE has a sibling, *sibling is set to the skipped DIE sibling value. */ |
| 1537 | static |
| 1538 | void skip_DIE (UWord *sibling, |
| 1539 | Cursor* c_die, |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 1540 | const g_abbv *abbv, |
| 1541 | const CUConst* cc) |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 1542 | { |
| 1543 | UInt nf_i; |
| 1544 | FormContents cts; |
| 1545 | nf_i = 0; |
| 1546 | while (True) { |
| 1547 | if (abbv->nf[nf_i].at_name == DW_AT_sibling) { |
| 1548 | get_Form_contents( &cts, cc, c_die, False /*td3*/, |
| 1549 | (DW_FORM)abbv->nf[nf_i].at_form ); |
| 1550 | if ( cts.szB > 0 ) |
| 1551 | *sibling = cts.u.val; |
| 1552 | nf_i++; |
| 1553 | } else if (abbv->nf[nf_i].skip_szB == VARSZ_FORM) { |
| 1554 | get_Form_contents( &cts, cc, c_die, False /*td3*/, |
| 1555 | (DW_FORM)abbv->nf[nf_i].at_form ); |
| 1556 | nf_i++; |
| 1557 | } else { |
| 1558 | advance_position_of_Cursor (c_die, (ULong)abbv->nf[nf_i].skip_szB); |
| 1559 | nf_i = abbv->nf[nf_i].next_nf; |
| 1560 | } |
| 1561 | if (nf_i == 0) |
| 1562 | break; |
| 1563 | } |
| 1564 | } |
| 1565 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1566 | |
| 1567 | /*------------------------------------------------------------*/ |
| 1568 | /*--- ---*/ |
| 1569 | /*--- Parsing of variable-related DIEs ---*/ |
| 1570 | /*--- ---*/ |
| 1571 | /*------------------------------------------------------------*/ |
| 1572 | |
| 1573 | typedef |
| 1574 | struct _TempVar { |
florian | 1ef70c6 | 2014-10-22 17:42:37 +0000 | [diff] [blame] | 1575 | const HChar* name; /* in DebugInfo's .strpool */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1576 | /* Represent ranges economically. nRanges is the number of |
| 1577 | ranges. Cases: |
| 1578 | 0: .rngOneMin .rngOneMax .manyRanges are all zero |
| 1579 | 1: .rngOneMin .rngOneMax hold the range; .rngMany is NULL |
| 1580 | 2: .rngOneMin .rngOneMax are zero; .rngMany holds the ranges. |
| 1581 | This is merely an optimisation to avoid having to allocate |
| 1582 | and free the XArray in the common (98%) of cases where there |
| 1583 | is zero or one address ranges. */ |
| 1584 | UWord nRanges; |
| 1585 | Addr rngOneMin; |
| 1586 | Addr rngOneMax; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 1587 | XArray* rngMany; /* of AddrRange. NON-UNIQUE PTR in AR_DINFO. */ |
| 1588 | /* Do not free .rngMany, since many TempVars will have the same |
| 1589 | value. Instead the associated storage is to be freed by |
| 1590 | deleting 'rangetree', which stores a single copy of each |
| 1591 | range. */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1592 | /* --- */ |
| 1593 | Int level; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 1594 | UWord typeR; /* a cuOff */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1595 | GExpr* gexpr; /* for this variable */ |
| 1596 | GExpr* fbGX; /* to find the frame base of the enclosing fn, if |
| 1597 | any */ |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1598 | UInt fndn_ix; /* declaring file/dirname index in fndnpool, or 0 */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1599 | Int fLine; /* declaring file line number, or zero */ |
| 1600 | /* offset in .debug_info, so that abstract instances can be |
| 1601 | found to satisfy references from concrete instances. */ |
| 1602 | UWord dioff; |
| 1603 | UWord absOri; /* so the absOri fields refer to dioff fields |
| 1604 | in some other, related TempVar. */ |
| 1605 | } |
| 1606 | TempVar; |
| 1607 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1608 | typedef |
| 1609 | struct { |
| 1610 | /* Contains the range stack: a stack of address ranges, one |
| 1611 | stack entry for each nested scope. |
| 1612 | |
| 1613 | Some scope entries are created by function definitions |
| 1614 | (DW_AT_subprogram), and for those, we also note the GExpr |
| 1615 | derived from its DW_AT_frame_base attribute, if any. |
| 1616 | Consequently it should be possible to find, for any |
florian | ad4e979 | 2015-07-05 21:53:33 +0000 | [diff] [blame] | 1617 | variable's DIE, the GExpr for the containing function's |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1618 | DW_AT_frame_base by scanning back through the stack to find |
| 1619 | the nearest entry associated with a function. This somewhat |
| 1620 | elaborate scheme is provided so as to make it possible to |
| 1621 | obtain the correct DW_AT_frame_base expression even in the |
| 1622 | presence of nested functions (or to be more precise, in the |
| 1623 | presence of nested DW_AT_subprogram DIEs). |
| 1624 | */ |
| 1625 | Int sp; /* [sp] is innermost active entry; sp==-1 for empty |
| 1626 | stack */ |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 1627 | Int stack_size; |
| 1628 | XArray **ranges; /* XArray of AddrRange */ |
| 1629 | Int *level; /* D3 DIE levels */ |
| 1630 | Bool *isFunc; /* from DW_AT_subprogram? */ |
| 1631 | GExpr **fbGX; /* if isFunc, contains the FB expr, else NULL */ |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1632 | /* The fndn_ix file name/dirname table. Is a mapping from dwarf |
| 1633 | integer index to the index in di->fndnpool. */ |
| 1634 | XArray* /* of UInt* */ fndn_ix_Table; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1635 | } |
| 1636 | D3VarParser; |
| 1637 | |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 1638 | /* Completely initialise a variable parser object */ |
| 1639 | static void |
| 1640 | var_parser_init ( D3VarParser *parser ) |
| 1641 | { |
| 1642 | parser->sp = -1; |
| 1643 | parser->stack_size = 0; |
| 1644 | parser->ranges = NULL; |
| 1645 | parser->level = NULL; |
| 1646 | parser->isFunc = NULL; |
| 1647 | parser->fbGX = NULL; |
| 1648 | parser->fndn_ix_Table = NULL; |
| 1649 | } |
| 1650 | |
| 1651 | /* Release any memory hanging off a variable parser object */ |
| 1652 | static void |
| 1653 | var_parser_release ( D3VarParser *parser ) |
| 1654 | { |
| 1655 | ML_(dinfo_free)( parser->ranges ); |
| 1656 | ML_(dinfo_free)( parser->level ); |
| 1657 | ML_(dinfo_free)( parser->isFunc ); |
| 1658 | ML_(dinfo_free)( parser->fbGX ); |
| 1659 | } |
| 1660 | |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 1661 | static void varstack_show ( const D3VarParser* parser, const HChar* str ) |
| 1662 | { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1663 | Word i, j; |
| 1664 | VG_(printf)(" varstack (%s) {\n", str); |
| 1665 | for (i = 0; i <= parser->sp; i++) { |
| 1666 | XArray* xa = parser->ranges[i]; |
| 1667 | vg_assert(xa); |
| 1668 | VG_(printf)(" [%ld] (level %d)", i, parser->level[i]); |
| 1669 | if (parser->isFunc[i]) { |
| 1670 | VG_(printf)(" (fbGX=%p)", parser->fbGX[i]); |
| 1671 | } else { |
| 1672 | vg_assert(parser->fbGX[i] == NULL); |
| 1673 | } |
| 1674 | VG_(printf)(": "); |
| 1675 | if (VG_(sizeXA)( xa ) == 0) { |
| 1676 | VG_(printf)("** empty PC range array **"); |
| 1677 | } else { |
| 1678 | for (j = 0; j < VG_(sizeXA)( xa ); j++) { |
| 1679 | AddrRange* range = (AddrRange*) VG_(indexXA)( xa, j ); |
| 1680 | vg_assert(range); |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 1681 | VG_(printf)("[%#lx,%#lx] ", range->aMin, range->aMax); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1682 | } |
| 1683 | } |
| 1684 | VG_(printf)("\n"); |
| 1685 | } |
| 1686 | VG_(printf)(" }\n"); |
| 1687 | } |
| 1688 | |
| 1689 | /* Remove from the stack, all entries with .level > 'level' */ |
| 1690 | static |
| 1691 | void varstack_preen ( D3VarParser* parser, Bool td3, Int level ) |
| 1692 | { |
| 1693 | Bool changed = False; |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 1694 | vg_assert(parser->sp < parser->stack_size); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1695 | while (True) { |
| 1696 | vg_assert(parser->sp >= -1); |
| 1697 | if (parser->sp == -1) break; |
| 1698 | if (parser->level[parser->sp] <= level) break; |
| 1699 | if (0) |
| 1700 | TRACE_D3("BBBBAAAA varstack_pop [newsp=%d]\n", parser->sp-1); |
| 1701 | vg_assert(parser->ranges[parser->sp]); |
| 1702 | /* Who allocated this xa? get_range_list() or |
| 1703 | unitary_range_list(). */ |
| 1704 | VG_(deleteXA)( parser->ranges[parser->sp] ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1705 | parser->sp--; |
| 1706 | changed = True; |
| 1707 | } |
| 1708 | if (changed && td3) |
| 1709 | varstack_show( parser, "after preen" ); |
| 1710 | } |
| 1711 | |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 1712 | static void varstack_push ( const CUConst* cc, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1713 | D3VarParser* parser, |
| 1714 | Bool td3, |
| 1715 | XArray* ranges, Int level, |
| 1716 | Bool isFunc, GExpr* fbGX ) { |
| 1717 | if (0) |
| 1718 | TRACE_D3("BBBBAAAA varstack_push[newsp=%d]: %d %p\n", |
| 1719 | parser->sp+1, level, ranges); |
| 1720 | |
| 1721 | /* First we need to zap everything >= 'level', as we are about to |
| 1722 | replace any previous entry at 'level', so .. */ |
| 1723 | varstack_preen(parser, /*td3*/False, level-1); |
| 1724 | |
| 1725 | vg_assert(parser->sp >= -1); |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 1726 | vg_assert(parser->sp < parser->stack_size); |
| 1727 | if (parser->sp == parser->stack_size - 1) { |
| 1728 | parser->stack_size += 48; |
| 1729 | parser->ranges = |
| 1730 | ML_(dinfo_realloc)("di.readdwarf3.varpush.1", parser->ranges, |
| 1731 | parser->stack_size * sizeof parser->ranges[0]); |
| 1732 | parser->level = |
| 1733 | ML_(dinfo_realloc)("di.readdwarf3.varpush.2", parser->level, |
| 1734 | parser->stack_size * sizeof parser->level[0]); |
| 1735 | parser->isFunc = |
| 1736 | ML_(dinfo_realloc)("di.readdwarf3.varpush.3", parser->isFunc, |
| 1737 | parser->stack_size * sizeof parser->isFunc[0]); |
| 1738 | parser->fbGX = |
| 1739 | ML_(dinfo_realloc)("di.readdwarf3.varpush.4", parser->fbGX, |
| 1740 | parser->stack_size * sizeof parser->fbGX[0]); |
| 1741 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1742 | if (parser->sp >= 0) |
| 1743 | vg_assert(parser->level[parser->sp] < level); |
| 1744 | parser->sp++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1745 | vg_assert(ranges != NULL); |
| 1746 | if (!isFunc) vg_assert(fbGX == NULL); |
| 1747 | parser->ranges[parser->sp] = ranges; |
| 1748 | parser->level[parser->sp] = level; |
| 1749 | parser->isFunc[parser->sp] = isFunc; |
| 1750 | parser->fbGX[parser->sp] = fbGX; |
philippe | e0bd591 | 2014-06-21 09:48:17 +0000 | [diff] [blame] | 1751 | if (TD3) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1752 | varstack_show( parser, "after push" ); |
| 1753 | } |
| 1754 | |
| 1755 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1756 | /* cts is derived from a DW_AT_location and so refers either to a |
| 1757 | location expression or to a location list. Figure out which, and |
| 1758 | in both cases bundle the expression or location list into a |
| 1759 | so-called GExpr (guarded expression). */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1760 | __attribute__((noinline)) |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 1761 | static GExpr* get_GX ( const CUConst* cc, Bool td3, const FormContents* cts ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1762 | { |
| 1763 | GExpr* gexpr = NULL; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1764 | if (cts->szB < 0) { |
| 1765 | /* represents a non-empty in-line location expression, and |
| 1766 | cts->u.cur points at the image bytes */ |
| 1767 | gexpr = make_singleton_GX( cts->u.cur, (ULong)(- cts->szB) ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1768 | } |
| 1769 | else |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1770 | if (cts->szB > 0) { |
| 1771 | /* represents a location list. cts->u.val is the offset of it |
| 1772 | in .debug_loc. */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1773 | if (!cc->cu_svma_known) |
| 1774 | cc->barf("get_GX: location list, but CU svma is unknown"); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1775 | gexpr = make_general_GX( cc, td3, cts->u.val, cc->cu_svma ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1776 | } |
| 1777 | else { |
| 1778 | vg_assert(0); /* else caller is bogus */ |
| 1779 | } |
| 1780 | return gexpr; |
| 1781 | } |
| 1782 | |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1783 | /* Returns an xarray* of directory names (indexed by the dwarf dirname |
| 1784 | integer). |
| 1785 | If 'compdir' is NULL, entry [0] will be set to "." |
| 1786 | otherwise entry [0] is set to compdir. |
| 1787 | Entry [0] basically means "the current directory of the compilation", |
| 1788 | whatever that means, according to the DWARF3 spec. |
| 1789 | FIXME??? readdwarf3.c/readdwarf.c have a lot of duplicated code */ |
| 1790 | static |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 1791 | XArray* read_dirname_xa (DebugInfo* di, const HChar *compdir, |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1792 | Cursor *c, |
| 1793 | Bool td3 ) |
| 1794 | { |
| 1795 | XArray* dirname_xa; /* xarray of HChar* dirname */ |
| 1796 | const HChar* dirname; |
florian | c505820 | 2014-12-17 19:52:25 +0000 | [diff] [blame] | 1797 | UInt compdir_len; |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1798 | |
| 1799 | dirname_xa = VG_(newXA) (ML_(dinfo_zalloc), "di.rdxa.1", ML_(dinfo_free), |
| 1800 | sizeof(HChar*) ); |
| 1801 | |
| 1802 | if (compdir == NULL) { |
| 1803 | dirname = "."; |
florian | c505820 | 2014-12-17 19:52:25 +0000 | [diff] [blame] | 1804 | compdir_len = 1; |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1805 | } else { |
| 1806 | dirname = compdir; |
| 1807 | compdir_len = VG_(strlen)(compdir); |
| 1808 | } |
| 1809 | VG_(addToXA) (dirname_xa, &dirname); |
| 1810 | |
| 1811 | TRACE_D3(" The Directory Table%s\n", |
| 1812 | peek_UChar(c) == 0 ? " is empty." : ":" ); |
| 1813 | |
| 1814 | while (peek_UChar(c) != 0) { |
| 1815 | |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1816 | DiCursor cur = get_AsciiZ(c); |
| 1817 | HChar* data_str = ML_(cur_read_strdup)( cur, "dirname_xa.1" ); |
| 1818 | TRACE_D3(" %s\n", data_str); |
| 1819 | |
| 1820 | /* If data_str[0] is '/', then 'data' is an absolute path and we |
florian | c505820 | 2014-12-17 19:52:25 +0000 | [diff] [blame] | 1821 | don't mess with it. Otherwise, construct the |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1822 | path 'compdir' ++ "/" ++ 'data'. */ |
| 1823 | |
| 1824 | if (data_str[0] != '/' |
| 1825 | /* not an absolute path */ |
| 1826 | && compdir |
| 1827 | /* actually got something sensible for compdir */ |
florian | c505820 | 2014-12-17 19:52:25 +0000 | [diff] [blame] | 1828 | && compdir_len) |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1829 | { |
florian | c505820 | 2014-12-17 19:52:25 +0000 | [diff] [blame] | 1830 | SizeT len = compdir_len + 1 + VG_(strlen)(data_str); |
| 1831 | HChar *buf = ML_(dinfo_zalloc)("dirname_xa.2", len + 1); |
| 1832 | |
| 1833 | VG_(strcpy)(buf, compdir); |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1834 | VG_(strcat)(buf, "/"); |
| 1835 | VG_(strcat)(buf, data_str); |
florian | c505820 | 2014-12-17 19:52:25 +0000 | [diff] [blame] | 1836 | |
| 1837 | dirname = ML_(addStr)(di, buf, len); |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1838 | VG_(addToXA) (dirname_xa, &dirname); |
| 1839 | if (0) VG_(printf)("rel path %s\n", buf); |
florian | c505820 | 2014-12-17 19:52:25 +0000 | [diff] [blame] | 1840 | ML_(dinfo_free)(buf); |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1841 | } else { |
| 1842 | /* just use 'data'. */ |
| 1843 | dirname = ML_(addStr)(di,data_str,-1); |
| 1844 | VG_(addToXA) (dirname_xa, &dirname); |
| 1845 | if (0) VG_(printf)("abs path %s\n", data_str); |
| 1846 | } |
| 1847 | |
| 1848 | ML_(dinfo_free)(data_str); |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1849 | } |
| 1850 | |
| 1851 | TRACE_D3 ("\n"); |
| 1852 | |
| 1853 | if (get_UChar (c) != 0) { |
| 1854 | ML_(symerr)(NULL, True, |
| 1855 | "could not get NUL at end of DWARF directory table"); |
| 1856 | VG_(deleteXA)(dirname_xa); |
| 1857 | return NULL; |
| 1858 | } |
| 1859 | |
| 1860 | return dirname_xa; |
| 1861 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1862 | |
| 1863 | static |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1864 | void read_filename_table( /*MOD*/XArray* /* of UInt* */ fndn_ix_Table, |
florian | 1ef70c6 | 2014-10-22 17:42:37 +0000 | [diff] [blame] | 1865 | const HChar* compdir, |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 1866 | const CUConst* cc, ULong debug_line_offset, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1867 | Bool td3 ) |
| 1868 | { |
| 1869 | Bool is_dw64; |
| 1870 | Cursor c; |
| 1871 | Word i; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1872 | UShort version; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1873 | UChar opcode_base; |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 1874 | const HChar* str; |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1875 | XArray* dirname_xa; /* xarray of HChar* dirname */ |
| 1876 | ULong dir_xa_ix; /* Index in dirname_xa, as read from dwarf info. */ |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 1877 | const HChar* dirname; |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1878 | UInt fndn_ix; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1879 | |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1880 | vg_assert(fndn_ix_Table && cc && cc->barf); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1881 | if (!ML_(sli_is_valid)(cc->escn_debug_line) |
| 1882 | || cc->escn_debug_line.szB <= debug_line_offset) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1883 | cc->barf("read_filename_table: .debug_line is missing?"); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1884 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1885 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1886 | init_Cursor( &c, cc->escn_debug_line, debug_line_offset, cc->barf, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1887 | "Overrun whilst reading .debug_line section(1)" ); |
| 1888 | |
njn | 4c245e5 | 2009-03-15 23:25:38 +0000 | [diff] [blame] | 1889 | /* unit_length = */ |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 1890 | get_Initial_Length( &is_dw64, &c, |
| 1891 | "read_filename_table: invalid initial-length field" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1892 | version = get_UShort( &c ); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1893 | if (version != 2 && version != 3 && version != 4) |
| 1894 | 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] | 1895 | "is currently supported."); |
njn | 4c245e5 | 2009-03-15 23:25:38 +0000 | [diff] [blame] | 1896 | /*header_length = (ULong)*/ get_Dwarfish_UWord( &c, is_dw64 ); |
| 1897 | /*minimum_instruction_length = */ get_UChar( &c ); |
tom | fba428c | 2010-04-28 08:09:30 +0000 | [diff] [blame] | 1898 | if (version >= 4) |
| 1899 | /*maximum_operations_per_insn = */ get_UChar( &c ); |
njn | 4c245e5 | 2009-03-15 23:25:38 +0000 | [diff] [blame] | 1900 | /*default_is_stmt = */ get_UChar( &c ); |
| 1901 | /*line_base = (Char)*/ get_UChar( &c ); |
| 1902 | /*line_range = */ get_UChar( &c ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1903 | opcode_base = get_UChar( &c ); |
| 1904 | /* skip over "standard_opcode_lengths" */ |
| 1905 | for (i = 1; i < (Word)opcode_base; i++) |
| 1906 | (void)get_UChar( &c ); |
| 1907 | |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1908 | dirname_xa = read_dirname_xa(cc->di, compdir, &c, td3); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1909 | |
| 1910 | /* Read and record the file names table */ |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1911 | vg_assert( VG_(sizeXA)( fndn_ix_Table ) == 0 ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1912 | /* Add a dummy index-zero entry. DWARF3 numbers its files |
| 1913 | from 1, for some reason. */ |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1914 | fndn_ix = ML_(addFnDn) ( cc->di, "<unknown_file>", NULL ); |
| 1915 | VG_(addToXA)( fndn_ix_Table, &fndn_ix ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1916 | while (peek_UChar(&c) != 0) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 1917 | DiCursor cur = get_AsciiZ(&c); |
| 1918 | str = ML_(addStrFromCursor)( cc->di, cur ); |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1919 | dir_xa_ix = get_ULEB128( &c ); |
| 1920 | if (dirname_xa != NULL |
| 1921 | && dir_xa_ix >= 0 && dir_xa_ix < VG_(sizeXA) (dirname_xa)) |
| 1922 | dirname = *(HChar**)VG_(indexXA) ( dirname_xa, dir_xa_ix ); |
| 1923 | else |
| 1924 | dirname = NULL; |
| 1925 | fndn_ix = ML_(addFnDn)( cc->di, str, dirname); |
florian | c6e5d76 | 2015-08-05 22:27:24 +0000 | [diff] [blame] | 1926 | TRACE_D3(" read_filename_table: %ld fndn_ix %u %s %s\n", |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1927 | VG_(sizeXA)(fndn_ix_Table), fndn_ix, |
| 1928 | dirname, str); |
| 1929 | VG_(addToXA)( fndn_ix_Table, &fndn_ix ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1930 | (void)get_ULEB128( &c ); /* skip last mod time */ |
| 1931 | (void)get_ULEB128( &c ); /* file size */ |
| 1932 | } |
| 1933 | /* We're done! The rest of it is not interesting. */ |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 1934 | if (dirname_xa != NULL) |
| 1935 | VG_(deleteXA)(dirname_xa); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 1936 | } |
| 1937 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 1938 | /* setup_cu_svma to be called when a cu is found at level 0, |
| 1939 | to establish the cu_svma. */ |
| 1940 | static void setup_cu_svma(CUConst* cc, Bool have_lo, Addr ip_lo, Bool td3) |
| 1941 | { |
| 1942 | Addr cu_svma; |
| 1943 | /* We have potentially more than one type of parser parsing the |
| 1944 | dwarf information. At least currently, each parser establishes |
| 1945 | the cu_svma. So, in case cu_svma_known, we check that the same |
| 1946 | result is obtained by the 2nd parsing of the cu. |
| 1947 | |
| 1948 | Alternatively, we could reset cu_svma_known after each parsing |
| 1949 | and then check that we only see a single DW_TAG_compile_unit DIE |
| 1950 | at level 0, DWARF3 only allows exactly one top level DIE per |
| 1951 | CU. */ |
| 1952 | |
| 1953 | if (have_lo) |
| 1954 | cu_svma = ip_lo; |
| 1955 | else { |
| 1956 | /* Now, it may be that this DIE doesn't tell us the CU's |
| 1957 | SVMA, by way of not having a DW_AT_low_pc. That's OK -- |
| 1958 | the CU doesn't *have* to have its SVMA specified. |
| 1959 | |
| 1960 | But as per last para D3 spec sec 3.1.1 ("Normal and |
| 1961 | Partial Compilation Unit Entries", "If the base address |
| 1962 | (viz, the SVMA) is undefined, then any DWARF entry of |
| 1963 | structure defined interms of the base address of that |
| 1964 | compilation unit is not valid.". So that means, if whilst |
| 1965 | processing the children of this top level DIE (or their |
| 1966 | children, etc) we see a DW_AT_range, and cu_svma_known is |
| 1967 | False, then the DIE that contains it is (per the spec) |
| 1968 | invalid, and we can legitimately stop and complain. */ |
| 1969 | /* .. whereas The Reality is, simply assume the SVMA is zero |
| 1970 | if it isn't specified. */ |
| 1971 | cu_svma = 0; |
| 1972 | } |
| 1973 | |
| 1974 | if (cc->cu_svma_known) { |
| 1975 | vg_assert (cu_svma == cc->cu_svma); |
| 1976 | } else { |
| 1977 | cc->cu_svma_known = True; |
| 1978 | cc->cu_svma = cu_svma; |
| 1979 | if (0) |
| 1980 | TRACE_D3("setup_cu_svma: acquire CU_SVMA of %p\n", (void*) cc->cu_svma); |
| 1981 | } |
| 1982 | } |
| 1983 | |
philippe | 86be6ed | 2014-06-17 20:21:26 +0000 | [diff] [blame] | 1984 | static void trace_DIE( |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 1985 | DW_TAG dtag, |
| 1986 | UWord posn, |
| 1987 | Int level, |
philippe | 86be6ed | 2014-06-17 20:21:26 +0000 | [diff] [blame] | 1988 | UWord saved_die_c_offset, |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 1989 | const g_abbv *abbv, |
| 1990 | const CUConst* cc) |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 1991 | { |
philippe | 86be6ed | 2014-06-17 20:21:26 +0000 | [diff] [blame] | 1992 | Cursor c; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 1993 | FormContents cts; |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 1994 | UWord sibling = 0; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 1995 | UInt nf_i; |
| 1996 | Bool debug_types_flag; |
| 1997 | Bool alt_flag; |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 1998 | Cursor check_skip; |
| 1999 | UWord check_sibling = 0; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2000 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2001 | posn = uncook_die( cc, posn, &debug_types_flag, &alt_flag ); |
philippe | 86be6ed | 2014-06-17 20:21:26 +0000 | [diff] [blame] | 2002 | init_Cursor (&c, |
| 2003 | debug_types_flag ? cc->escn_debug_types : |
| 2004 | alt_flag ? cc->escn_debug_info_alt : cc->escn_debug_info, |
| 2005 | saved_die_c_offset, cc->barf, |
| 2006 | "Overrun trace_DIE"); |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 2007 | check_skip = c; |
philippe | 86be6ed | 2014-06-17 20:21:26 +0000 | [diff] [blame] | 2008 | VG_(printf)(" <%d><%lx>: Abbrev Number: %llu (%s)%s%s\n", |
| 2009 | level, posn, (ULong) abbv->abbv_code, ML_(pp_DW_TAG)( dtag ), |
| 2010 | debug_types_flag ? " (in .debug_types)" : "", |
| 2011 | alt_flag ? " (in alternate .debug_info)" : ""); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2012 | nf_i = 0; |
| 2013 | while (True) { |
| 2014 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 2015 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 2016 | nf_i++; |
| 2017 | if (attr == 0 && form == 0) break; |
florian | 866862a | 2014-12-13 18:35:00 +0000 | [diff] [blame] | 2018 | VG_(printf)(" %-18s: ", ML_(pp_DW_AT)(attr)); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2019 | /* Get the form contents, so as to print them */ |
philippe | 86be6ed | 2014-06-17 20:21:26 +0000 | [diff] [blame] | 2020 | get_Form_contents( &cts, cc, &c, True, form ); |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 2021 | if (attr == DW_AT_sibling && cts.szB > 0) { |
| 2022 | sibling = cts.u.val; |
| 2023 | } |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2024 | VG_(printf)("\t\n"); |
| 2025 | } |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 2026 | |
| 2027 | /* Verify that skipping a DIE gives the same displacement as |
| 2028 | tracing (i.e. reading) a DIE. If there is an inconsistency in |
| 2029 | the nr of bytes read by get_Form_contents and get_Form_szB, this |
| 2030 | should be detected by the below. Using --trace-symtab=yes |
| 2031 | --read-var-info=yes will ensure all DIEs are systematically |
| 2032 | verified. */ |
| 2033 | skip_DIE (&check_sibling, &check_skip, abbv, cc); |
| 2034 | vg_assert (check_sibling == sibling); |
| 2035 | vg_assert (get_position_of_Cursor (&check_skip) |
| 2036 | == get_position_of_Cursor (&c)); |
philippe | 86be6ed | 2014-06-17 20:21:26 +0000 | [diff] [blame] | 2037 | } |
| 2038 | |
| 2039 | __attribute__((noreturn)) |
| 2040 | static void dump_bad_die_and_barf( |
| 2041 | const HChar *whichparser, |
| 2042 | DW_TAG dtag, |
| 2043 | UWord posn, |
| 2044 | Int level, |
| 2045 | Cursor* c_die, |
| 2046 | UWord saved_die_c_offset, |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 2047 | const g_abbv *abbv, |
| 2048 | const CUConst* cc) |
philippe | 86be6ed | 2014-06-17 20:21:26 +0000 | [diff] [blame] | 2049 | { |
| 2050 | trace_DIE (dtag, posn, level, saved_die_c_offset, abbv, cc); |
| 2051 | VG_(printf)("%s:\n", whichparser); |
philippe | 896a3bf | 2014-06-15 21:49:13 +0000 | [diff] [blame] | 2052 | cc->barf("confused by the above DIE"); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2053 | } |
| 2054 | |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2055 | __attribute__((noinline)) |
| 2056 | static void bad_DIE_confusion(int linenr) |
| 2057 | { |
philippe | 896a3bf | 2014-06-15 21:49:13 +0000 | [diff] [blame] | 2058 | VG_(printf)("\nparse DIE(readdwarf3.c:%d): confused by:\n", linenr); |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2059 | } |
| 2060 | #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] | 2061 | |
| 2062 | __attribute__((noinline)) |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2063 | static void parse_var_DIE ( |
| 2064 | /*MOD*/WordFM* /* of (XArray* of AddrRange, void) */ rangestree, |
| 2065 | /*MOD*/XArray* /* of TempVar* */ tempvars, |
| 2066 | /*MOD*/XArray* /* of GExpr* */ gexprs, |
| 2067 | /*MOD*/D3VarParser* parser, |
| 2068 | DW_TAG dtag, |
| 2069 | UWord posn, |
| 2070 | Int level, |
| 2071 | Cursor* c_die, |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 2072 | const g_abbv *abbv, |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2073 | CUConst* cc, |
| 2074 | Bool td3 |
| 2075 | ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2076 | { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2077 | FormContents cts; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 2078 | UInt nf_i; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2079 | |
| 2080 | UWord saved_die_c_offset = get_position_of_Cursor( c_die ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2081 | |
| 2082 | varstack_preen( parser, td3, level-1 ); |
| 2083 | |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 2084 | if (dtag == DW_TAG_compile_unit |
| 2085 | || dtag == DW_TAG_type_unit |
| 2086 | || dtag == DW_TAG_partial_unit) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2087 | Bool have_lo = False; |
| 2088 | Bool have_hi1 = False; |
sewardj | de065a0 | 2012-05-09 23:09:05 +0000 | [diff] [blame] | 2089 | Bool hiIsRelative = False; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2090 | Bool have_range = False; |
| 2091 | Addr ip_lo = 0; |
| 2092 | Addr ip_hi1 = 0; |
| 2093 | Addr rangeoff = 0; |
florian | 1ef70c6 | 2014-10-22 17:42:37 +0000 | [diff] [blame] | 2094 | const HChar *compdir = NULL; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 2095 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2096 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 2097 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 2098 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 2099 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2100 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2101 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2102 | if (attr == DW_AT_low_pc && cts.szB > 0) { |
| 2103 | ip_lo = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2104 | have_lo = True; |
| 2105 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2106 | if (attr == DW_AT_high_pc && cts.szB > 0) { |
| 2107 | ip_hi1 = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2108 | have_hi1 = True; |
sewardj | de065a0 | 2012-05-09 23:09:05 +0000 | [diff] [blame] | 2109 | if (form != DW_FORM_addr) |
| 2110 | hiIsRelative = True; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2111 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2112 | if (attr == DW_AT_ranges && cts.szB > 0) { |
| 2113 | rangeoff = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2114 | have_range = True; |
| 2115 | } |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2116 | if (attr == DW_AT_comp_dir) { |
| 2117 | if (cts.szB >= 0) |
| 2118 | cc->barf("parse_var_DIE compdir: expecting indirect string"); |
| 2119 | HChar *str = ML_(cur_read_strdup)( cts.u.cur, |
| 2120 | "parse_var_DIE.compdir" ); |
| 2121 | compdir = ML_(addStr)(cc->di, str, -1); |
| 2122 | ML_(dinfo_free) (str); |
| 2123 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2124 | if (attr == DW_AT_stmt_list && cts.szB > 0) { |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2125 | read_filename_table( parser->fndn_ix_Table, compdir, |
| 2126 | cc, cts.u.val, td3 ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2127 | } |
| 2128 | } |
sewardj | de065a0 | 2012-05-09 23:09:05 +0000 | [diff] [blame] | 2129 | if (have_lo && have_hi1 && hiIsRelative) |
| 2130 | ip_hi1 += ip_lo; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2131 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2132 | /* Now, does this give us an opportunity to find this |
| 2133 | CU's svma? */ |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2134 | if (level == 0) |
| 2135 | setup_cu_svma(cc, have_lo, ip_lo, td3); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2136 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2137 | /* Do we have something that looks sane? */ |
| 2138 | if (have_lo && have_hi1 && (!have_range)) { |
| 2139 | if (ip_lo < ip_hi1) |
| 2140 | varstack_push( cc, parser, td3, |
| 2141 | unitary_range_list(ip_lo, ip_hi1 - 1), |
| 2142 | level, |
| 2143 | False/*isFunc*/, NULL/*fbGX*/ ); |
philippe | 8130f91 | 2014-05-07 21:09:16 +0000 | [diff] [blame] | 2144 | else if (ip_lo == 0 && ip_hi1 == 0) |
| 2145 | /* CU has no code, presumably? |
| 2146 | Such situations have been encountered for code |
| 2147 | compiled with -ffunction-sections -fdata-sections |
| 2148 | and linked with --gc-sections. Completely |
| 2149 | eliminated CU gives such 0 lo/hi pc. Similarly |
| 2150 | to a CU which has no lo/hi/range pc, we push |
| 2151 | an empty range list. */ |
| 2152 | varstack_push( cc, parser, td3, |
| 2153 | empty_range_list(), |
| 2154 | level, |
| 2155 | False/*isFunc*/, NULL/*fbGX*/ ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2156 | } else |
| 2157 | if ((!have_lo) && (!have_hi1) && have_range) { |
| 2158 | varstack_push( cc, parser, td3, |
| 2159 | get_range_list( cc, td3, |
| 2160 | rangeoff, cc->cu_svma ), |
| 2161 | level, |
| 2162 | False/*isFunc*/, NULL/*fbGX*/ ); |
| 2163 | } else |
| 2164 | if ((!have_lo) && (!have_hi1) && (!have_range)) { |
| 2165 | /* CU has no code, presumably? */ |
| 2166 | varstack_push( cc, parser, td3, |
| 2167 | empty_range_list(), |
| 2168 | level, |
| 2169 | False/*isFunc*/, NULL/*fbGX*/ ); |
| 2170 | } else |
sewardj | f578a69 | 2008-06-24 09:51:55 +0000 | [diff] [blame] | 2171 | if (have_lo && (!have_hi1) && have_range && ip_lo == 0) { |
| 2172 | /* broken DIE created by gcc-4.3.X ? Ignore the |
| 2173 | apparently-redundant DW_AT_low_pc and use the DW_AT_ranges |
| 2174 | instead. */ |
| 2175 | varstack_push( cc, parser, td3, |
| 2176 | get_range_list( cc, td3, |
| 2177 | rangeoff, cc->cu_svma ), |
| 2178 | level, |
| 2179 | False/*isFunc*/, NULL/*fbGX*/ ); |
| 2180 | } else { |
| 2181 | if (0) VG_(printf)("I got hlo %d hhi1 %d hrange %d\n", |
| 2182 | (Int)have_lo, (Int)have_hi1, (Int)have_range); |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2183 | goto_bad_DIE; |
sewardj | f578a69 | 2008-06-24 09:51:55 +0000 | [diff] [blame] | 2184 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2185 | } |
| 2186 | |
| 2187 | if (dtag == DW_TAG_lexical_block || dtag == DW_TAG_subprogram) { |
| 2188 | Bool have_lo = False; |
| 2189 | Bool have_hi1 = False; |
| 2190 | Bool have_range = False; |
sewardj | de065a0 | 2012-05-09 23:09:05 +0000 | [diff] [blame] | 2191 | Bool hiIsRelative = False; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2192 | Addr ip_lo = 0; |
| 2193 | Addr ip_hi1 = 0; |
| 2194 | Addr rangeoff = 0; |
| 2195 | Bool isFunc = dtag == DW_TAG_subprogram; |
| 2196 | GExpr* fbGX = NULL; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 2197 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2198 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 2199 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 2200 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 2201 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2202 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2203 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2204 | if (attr == DW_AT_low_pc && cts.szB > 0) { |
| 2205 | ip_lo = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2206 | have_lo = True; |
| 2207 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2208 | if (attr == DW_AT_high_pc && cts.szB > 0) { |
| 2209 | ip_hi1 = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2210 | have_hi1 = True; |
sewardj | de065a0 | 2012-05-09 23:09:05 +0000 | [diff] [blame] | 2211 | if (form != DW_FORM_addr) |
| 2212 | hiIsRelative = True; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2213 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2214 | if (attr == DW_AT_ranges && cts.szB > 0) { |
| 2215 | rangeoff = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2216 | have_range = True; |
| 2217 | } |
| 2218 | if (isFunc |
| 2219 | && attr == DW_AT_frame_base |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2220 | && cts.szB != 0 /* either scalar or nonempty block */) { |
| 2221 | fbGX = get_GX( cc, False/*td3*/, &cts ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2222 | vg_assert(fbGX); |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 2223 | VG_(addToXA)(gexprs, &fbGX); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2224 | } |
| 2225 | } |
sewardj | de065a0 | 2012-05-09 23:09:05 +0000 | [diff] [blame] | 2226 | if (have_lo && have_hi1 && hiIsRelative) |
| 2227 | ip_hi1 += ip_lo; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2228 | /* Do we have something that looks sane? */ |
| 2229 | if (dtag == DW_TAG_subprogram |
| 2230 | && (!have_lo) && (!have_hi1) && (!have_range)) { |
| 2231 | /* This is legit - ignore it. Sec 3.3.3: "A subroutine entry |
| 2232 | representing a subroutine declaration that is not also a |
| 2233 | definition does not have code address or range |
| 2234 | attributes." */ |
| 2235 | } else |
| 2236 | if (dtag == DW_TAG_lexical_block |
| 2237 | && (!have_lo) && (!have_hi1) && (!have_range)) { |
| 2238 | /* I believe this is legit, and means the lexical block |
| 2239 | contains no insns (whatever that might mean). Ignore. */ |
| 2240 | } else |
| 2241 | if (have_lo && have_hi1 && (!have_range)) { |
| 2242 | /* This scope supplies just a single address range. */ |
| 2243 | if (ip_lo < ip_hi1) |
| 2244 | varstack_push( cc, parser, td3, |
| 2245 | unitary_range_list(ip_lo, ip_hi1 - 1), |
| 2246 | level, isFunc, fbGX ); |
| 2247 | } else |
| 2248 | if ((!have_lo) && (!have_hi1) && have_range) { |
| 2249 | /* This scope supplies multiple address ranges via the use of |
| 2250 | a range list. */ |
| 2251 | varstack_push( cc, parser, td3, |
| 2252 | get_range_list( cc, td3, |
| 2253 | rangeoff, cc->cu_svma ), |
| 2254 | level, isFunc, fbGX ); |
| 2255 | } else |
| 2256 | if (have_lo && (!have_hi1) && (!have_range)) { |
| 2257 | /* This scope is bogus. The D3 spec sec 3.4 (Lexical Block |
| 2258 | Entries) says fairly clearly that a scope must have either |
| 2259 | _range or (_low_pc and _high_pc). */ |
| 2260 | /* The spec is a bit ambiguous though. Perhaps a single byte |
| 2261 | range is intended? See sec 2.17 (Code Addresses And Ranges) */ |
| 2262 | /* This case is here because icc9 produced this: |
| 2263 | <2><13bd>: DW_TAG_lexical_block |
| 2264 | DW_AT_decl_line : 5229 |
| 2265 | DW_AT_decl_column : 37 |
| 2266 | DW_AT_decl_file : 1 |
| 2267 | DW_AT_low_pc : 0x401b03 |
| 2268 | */ |
| 2269 | /* Ignore (seems safe than pushing a single byte range) */ |
| 2270 | } else |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2271 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2272 | } |
| 2273 | |
| 2274 | if (dtag == DW_TAG_variable || dtag == DW_TAG_formal_parameter) { |
florian | 1ef70c6 | 2014-10-22 17:42:37 +0000 | [diff] [blame] | 2275 | const HChar* name = NULL; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2276 | UWord typeR = D3_INVALID_CUOFF; |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 2277 | Bool global = False; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2278 | GExpr* gexpr = NULL; |
| 2279 | Int n_attrs = 0; |
| 2280 | UWord abs_ori = (UWord)D3_INVALID_CUOFF; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2281 | Int lineNo = 0; |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2282 | UInt fndn_ix = 0; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 2283 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2284 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 2285 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 2286 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 2287 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2288 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2289 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2290 | n_attrs++; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2291 | if (attr == DW_AT_name && cts.szB < 0) { |
| 2292 | name = ML_(addStrFromCursor)( cc->di, cts.u.cur ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2293 | } |
| 2294 | if (attr == DW_AT_location |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2295 | && cts.szB != 0 /* either scalar or nonempty block */) { |
| 2296 | gexpr = get_GX( cc, False/*td3*/, &cts ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2297 | vg_assert(gexpr); |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 2298 | VG_(addToXA)(gexprs, &gexpr); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2299 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2300 | if (attr == DW_AT_type && cts.szB > 0) { |
| 2301 | typeR = cook_die_using_form( cc, cts.u.val, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2302 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2303 | if (attr == DW_AT_external && cts.szB > 0 && cts.u.val > 0) { |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 2304 | global = True; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2305 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2306 | if (attr == DW_AT_abstract_origin && cts.szB > 0) { |
| 2307 | abs_ori = (UWord)cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2308 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2309 | if (attr == DW_AT_declaration && cts.szB > 0 && cts.u.val > 0) { |
njn | 4c245e5 | 2009-03-15 23:25:38 +0000 | [diff] [blame] | 2310 | /*declaration = True;*/ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2311 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2312 | if (attr == DW_AT_decl_line && cts.szB > 0) { |
| 2313 | lineNo = (Int)cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2314 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 2315 | if (attr == DW_AT_decl_file && cts.szB > 0) { |
| 2316 | Int ftabIx = (Int)cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2317 | if (ftabIx >= 1 |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2318 | && ftabIx < VG_(sizeXA)( parser->fndn_ix_Table )) { |
| 2319 | fndn_ix = *(UInt*)VG_(indexXA)( parser->fndn_ix_Table, ftabIx ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2320 | } |
florian | c6e5d76 | 2015-08-05 22:27:24 +0000 | [diff] [blame] | 2321 | if (0) VG_(printf)("XXX filename fndn_ix = %u %s\n", fndn_ix, |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2322 | ML_(fndn_ix2filename) (cc->di, fndn_ix)); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2323 | } |
| 2324 | } |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 2325 | if (!global && dtag == DW_TAG_variable && level == 1) { |
| 2326 | /* Case of a static variable. It is better to declare |
| 2327 | it global as the variable is not really related to |
| 2328 | a PC range, as its address can be used by program |
| 2329 | counters outside of the ranges where it is visible . */ |
| 2330 | global = True; |
| 2331 | } |
| 2332 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2333 | /* We'll collect it under if one of the following three |
| 2334 | conditions holds: |
| 2335 | (1) has location and type -> completed |
| 2336 | (2) has type only -> is an abstract instance |
| 2337 | (3) has location and abs_ori -> is a concrete instance |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2338 | Name, fndn_ix and line number are all optional frills. |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2339 | */ |
| 2340 | if ( /* 1 */ (gexpr && typeR != D3_INVALID_CUOFF) |
| 2341 | /* 2 */ || (typeR != D3_INVALID_CUOFF) |
| 2342 | /* 3 */ || (gexpr && abs_ori != (UWord)D3_INVALID_CUOFF) ) { |
| 2343 | |
| 2344 | /* Add this variable to the list of interesting looking |
| 2345 | variables. Crucially, note along with it the address |
| 2346 | range(s) associated with the variable, which for locals |
| 2347 | will be the address ranges at the top of the varparser's |
| 2348 | stack. */ |
| 2349 | GExpr* fbGX = NULL; |
| 2350 | Word i, nRanges; |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 2351 | const XArray* /* of AddrRange */ xa; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2352 | TempVar* tv; |
| 2353 | /* Stack can't be empty; we put a dummy entry on it for the |
| 2354 | entire address range before starting with the DIEs for |
| 2355 | this CU. */ |
| 2356 | vg_assert(parser->sp >= 0); |
| 2357 | |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 2358 | /* If this is a local variable (non-global), try to find |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2359 | the GExpr for the DW_AT_frame_base of the containing |
| 2360 | function. It should have been pushed on the stack at the |
| 2361 | time we encountered its DW_TAG_subprogram DIE, so the way |
| 2362 | to find it is to scan back down the stack looking for it. |
| 2363 | If there isn't an enclosing stack entry marked 'isFunc' |
| 2364 | then we must be seeing variable or formal param DIEs |
| 2365 | outside of a function, so we deem the Dwarf to be |
| 2366 | malformed if that happens. Note that the fbGX may be NULL |
| 2367 | if the containing DT_TAG_subprogram didn't supply a |
| 2368 | DW_AT_frame_base -- that's OK, but there must actually be |
| 2369 | a containing DW_TAG_subprogram. */ |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 2370 | if (!global) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2371 | Bool found = False; |
| 2372 | for (i = parser->sp; i >= 0; i--) { |
| 2373 | if (parser->isFunc[i]) { |
| 2374 | fbGX = parser->fbGX[i]; |
| 2375 | found = True; |
| 2376 | break; |
| 2377 | } |
| 2378 | } |
| 2379 | if (!found) { |
| 2380 | if (0 && VG_(clo_verbosity) >= 0) { |
| 2381 | VG_(message)(Vg_DebugMsg, |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 2382 | "warning: parse_var_DIE: non-global variable " |
sewardj | 738856f | 2009-07-15 14:48:32 +0000 | [diff] [blame] | 2383 | "outside DW_TAG_subprogram\n"); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2384 | } |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 2385 | /* goto_bad_DIE; */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2386 | /* This seems to happen a lot. Just ignore it -- if, |
| 2387 | when we come to evaluation of the location (guarded) |
| 2388 | expression, it requires a frame base value, and |
| 2389 | there's no expression for that, then evaluation as a |
| 2390 | whole will fail. Harmless - a bit of a waste of |
| 2391 | cycles but nothing more. */ |
| 2392 | } |
| 2393 | } |
| 2394 | |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 2395 | /* re "global ? 0 : parser->sp" (twice), if the var is |
| 2396 | marked 'global' then we must put it at the global scope, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2397 | as only the global scope (level 0) covers the entire PC |
| 2398 | address space. It is asserted elsewhere that level 0 |
| 2399 | always covers the entire address space. */ |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 2400 | xa = parser->ranges[global ? 0 : parser->sp]; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2401 | nRanges = VG_(sizeXA)(xa); |
| 2402 | vg_assert(nRanges >= 0); |
| 2403 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2404 | tv = ML_(dinfo_zalloc)( "di.readdwarf3.pvD.1", sizeof(TempVar) ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2405 | tv->name = name; |
philippe | 81d24c3 | 2012-12-05 21:08:24 +0000 | [diff] [blame] | 2406 | tv->level = global ? 0 : parser->sp; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2407 | tv->typeR = typeR; |
| 2408 | tv->gexpr = gexpr; |
| 2409 | tv->fbGX = fbGX; |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2410 | tv->fndn_ix= fndn_ix; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2411 | tv->fLine = lineNo; |
| 2412 | tv->dioff = posn; |
| 2413 | tv->absOri = abs_ori; |
| 2414 | |
| 2415 | /* See explanation on definition of type TempVar for the |
| 2416 | reason for this elaboration. */ |
| 2417 | tv->nRanges = nRanges; |
| 2418 | tv->rngOneMin = 0; |
| 2419 | tv->rngOneMax = 0; |
| 2420 | tv->rngMany = NULL; |
| 2421 | if (nRanges == 1) { |
| 2422 | AddrRange* range = VG_(indexXA)(xa, 0); |
| 2423 | tv->rngOneMin = range->aMin; |
| 2424 | tv->rngOneMax = range->aMax; |
| 2425 | } |
| 2426 | else if (nRanges > 1) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2427 | /* See if we already have a range list which is |
| 2428 | structurally identical. If so, use that; if not, clone |
| 2429 | this one, and add it to our collection. */ |
| 2430 | UWord keyW, valW; |
| 2431 | if (VG_(lookupFM)( rangestree, &keyW, &valW, (UWord)xa )) { |
| 2432 | XArray* old = (XArray*)keyW; |
florian | e2800c9 | 2014-09-15 20:57:45 +0000 | [diff] [blame] | 2433 | vg_assert(valW == 0); |
| 2434 | vg_assert(old != xa); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2435 | tv->rngMany = old; |
| 2436 | } else { |
| 2437 | XArray* cloned = VG_(cloneXA)( "di.readdwarf3.pvD.2", xa ); |
| 2438 | tv->rngMany = cloned; |
| 2439 | VG_(addToFM)( rangestree, (UWord)cloned, 0 ); |
| 2440 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2441 | } |
| 2442 | |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 2443 | VG_(addToXA)( tempvars, &tv ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2444 | |
| 2445 | TRACE_D3(" Recording this variable, with %ld PC range(s)\n", |
| 2446 | VG_(sizeXA)(xa) ); |
| 2447 | /* collect stats on how effective the ->ranges special |
| 2448 | casing is */ |
| 2449 | if (0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2450 | static Int ntot=0, ngt=0; |
| 2451 | ntot++; |
| 2452 | if (tv->rngMany) ngt++; |
| 2453 | if (0 == (ntot % 100000)) |
| 2454 | VG_(printf)("XXXX %d tot, %d cloned\n", ntot, ngt); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2455 | } |
| 2456 | |
| 2457 | } |
| 2458 | |
| 2459 | /* Here are some other weird cases seen in the wild: |
| 2460 | |
| 2461 | We have a variable with a name and a type, but no |
| 2462 | location. I guess that's a sign that it has been |
| 2463 | optimised away. Ignore it. Here's an example: |
| 2464 | |
| 2465 | static Int lc_compar(void* n1, void* n2) { |
| 2466 | MC_Chunk* mc1 = *(MC_Chunk**)n1; |
| 2467 | MC_Chunk* mc2 = *(MC_Chunk**)n2; |
| 2468 | return (mc1->data < mc2->data ? -1 : 1); |
| 2469 | } |
| 2470 | |
| 2471 | Both mc1 and mc2 are like this |
| 2472 | <2><5bc>: Abbrev Number: 21 (DW_TAG_variable) |
| 2473 | DW_AT_name : mc1 |
| 2474 | DW_AT_decl_file : 1 |
| 2475 | DW_AT_decl_line : 216 |
| 2476 | DW_AT_type : <5d3> |
| 2477 | |
| 2478 | whereas n1 and n2 do have locations specified. |
| 2479 | |
| 2480 | --------------------------------------------- |
| 2481 | |
| 2482 | We see a DW_TAG_formal_parameter with a type, but |
| 2483 | no name and no location. It's probably part of a function type |
| 2484 | construction, thusly, hence ignore it: |
| 2485 | <1><2b4>: Abbrev Number: 12 (DW_TAG_subroutine_type) |
| 2486 | DW_AT_sibling : <2c9> |
| 2487 | DW_AT_prototyped : 1 |
| 2488 | DW_AT_type : <114> |
| 2489 | <2><2be>: Abbrev Number: 13 (DW_TAG_formal_parameter) |
| 2490 | DW_AT_type : <13e> |
| 2491 | <2><2c3>: Abbrev Number: 13 (DW_TAG_formal_parameter) |
| 2492 | DW_AT_type : <133> |
| 2493 | |
| 2494 | --------------------------------------------- |
| 2495 | |
| 2496 | Is very minimal, like this: |
| 2497 | <4><81d>: Abbrev Number: 44 (DW_TAG_variable) |
| 2498 | DW_AT_abstract_origin: <7ba> |
| 2499 | What that signifies I have no idea. Ignore. |
| 2500 | |
| 2501 | ---------------------------------------------- |
| 2502 | |
| 2503 | Is very minimal, like this: |
| 2504 | <200f>: DW_TAG_formal_parameter |
| 2505 | DW_AT_abstract_ori: <1f4c> |
| 2506 | DW_AT_location : 13440 |
| 2507 | What that signifies I have no idea. Ignore. |
| 2508 | It might be significant, though: the variable at least |
| 2509 | has a location and so might exist somewhere. |
| 2510 | Maybe we should handle this. |
| 2511 | |
| 2512 | --------------------------------------------- |
| 2513 | |
| 2514 | <22407>: DW_TAG_variable |
| 2515 | DW_AT_name : (indirect string, offset: 0x6579): |
| 2516 | vgPlain_trampoline_stuff_start |
| 2517 | DW_AT_decl_file : 29 |
| 2518 | DW_AT_decl_line : 56 |
| 2519 | DW_AT_external : 1 |
| 2520 | DW_AT_declaration : 1 |
| 2521 | |
| 2522 | Nameless and typeless variable that has a location? Who |
| 2523 | knows. Not me. |
| 2524 | <2><3d178>: Abbrev Number: 22 (DW_TAG_variable) |
| 2525 | DW_AT_location : 9 byte block: 3 c0 c7 13 38 0 0 0 0 |
| 2526 | (DW_OP_addr: 3813c7c0) |
| 2527 | |
| 2528 | No, really. Check it out. gcc is quite simply borked. |
| 2529 | <3><168cc>: Abbrev Number: 141 (DW_TAG_variable) |
| 2530 | // followed by no attributes, and the next DIE is a sibling, |
| 2531 | // not a child |
| 2532 | */ |
| 2533 | } |
| 2534 | return; |
| 2535 | |
| 2536 | bad_DIE: |
philippe | 896a3bf | 2014-06-15 21:49:13 +0000 | [diff] [blame] | 2537 | dump_bad_die_and_barf("parse_var_DIE", dtag, posn, level, |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2538 | c_die, saved_die_c_offset, |
| 2539 | abbv, |
| 2540 | cc); |
| 2541 | /*NOTREACHED*/ |
| 2542 | } |
| 2543 | |
| 2544 | typedef |
| 2545 | struct { |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2546 | /* The fndn_ix file name/dirname table. Is a mapping from dwarf |
| 2547 | integer index to the index in di->fndnpool. */ |
| 2548 | XArray* /* of UInt* */ fndn_ix_Table; |
philippe | d16fb63 | 2014-06-16 21:49:42 +0000 | [diff] [blame] | 2549 | UWord sibling; // sibling of the last read DIE (if it has a sibling). |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 2550 | } |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2551 | D3InlParser; |
| 2552 | |
| 2553 | /* Return the function name corresponding to absori. |
philippe | 6ae06ed | 2014-09-06 00:13:47 +0000 | [diff] [blame] | 2554 | |
| 2555 | absori is a 'cooked' reference to a DIE, i.e. absori can be either |
| 2556 | in cc->escn_debug_info or in cc->escn_debug_info_alt. |
| 2557 | get_inlFnName will uncook absori. |
| 2558 | |
| 2559 | The returned value is a (permanent) string in DebugInfo's .strchunks. |
| 2560 | |
| 2561 | LIMITATION: absori must point in the CU of cc. If absori points |
| 2562 | in another CU, returns "UnknownInlinedFun". |
| 2563 | |
| 2564 | Here are the problems to retrieve the fun name if absori is in |
| 2565 | another CU: the DIE reading code cannot properly extract data from |
| 2566 | another CU, as the abbv code retrieved in the other CU cannot be |
| 2567 | translated in an abbreviation. Reading data from the alternate debug |
| 2568 | info also gives problems as the string reference is also in the alternate |
| 2569 | file, but when reading the alt DIE, the string form is a 'local' string, |
| 2570 | but cannot be read in the current CU, but must be read in the alt CU. |
| 2571 | See bug 338803 comment#3 and attachment for a failed attempt to handle |
| 2572 | these problems (failed because with the patch, only one alt abbrev hash |
| 2573 | table is kept, while we must handle all abbreviations in all CUs |
| 2574 | referenced by an absori (being a reference to an alt CU, or a previous |
| 2575 | or following CU). */ |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 2576 | static const HChar* get_inlFnName (Int absori, const CUConst* cc, Bool td3) |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2577 | { |
| 2578 | Cursor c; |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 2579 | const g_abbv *abbv; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2580 | ULong atag, abbv_code; |
| 2581 | UInt has_children; |
| 2582 | UWord posn; |
philippe | 6ae06ed | 2014-09-06 00:13:47 +0000 | [diff] [blame] | 2583 | Bool type_flag, alt_flag; |
florian | 1ef70c6 | 2014-10-22 17:42:37 +0000 | [diff] [blame] | 2584 | const HChar *ret = NULL; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2585 | FormContents cts; |
| 2586 | UInt nf_i; |
| 2587 | |
philippe | 6ae06ed | 2014-09-06 00:13:47 +0000 | [diff] [blame] | 2588 | posn = uncook_die( cc, absori, &type_flag, &alt_flag); |
| 2589 | if (type_flag) |
| 2590 | cc->barf("get_inlFnName: uncooked absori in type debug info"); |
| 2591 | |
| 2592 | /* LIMITATION: check we are in the same CU. |
| 2593 | If not, return unknown inlined function name. */ |
| 2594 | /* if crossing between alt debug info<>normal info |
| 2595 | or posn not in the cu range, |
| 2596 | then it is in another CU. */ |
| 2597 | if (alt_flag != cc->is_alt_info |
| 2598 | || posn < cc->cu_start_offset |
| 2599 | || posn >= cc->cu_start_offset + cc->unit_length) { |
| 2600 | static Bool reported = False; |
mjw | ba60227 | 2014-09-08 09:25:55 +0000 | [diff] [blame] | 2601 | if (!reported && VG_(clo_verbosity) > 1) { |
philippe | 6ae06ed | 2014-09-06 00:13:47 +0000 | [diff] [blame] | 2602 | VG_(message)(Vg_DebugMsg, |
| 2603 | "Warning: cross-CU LIMITATION: some inlined fn names\n" |
| 2604 | "might be shown as UnknownInlinedFun\n"); |
| 2605 | reported = True; |
| 2606 | } |
| 2607 | TRACE_D3(" <get_inlFnName><%lx>: cross-CU LIMITATION", posn); |
| 2608 | return ML_(addStr)(cc->di, "UnknownInlinedFun", -1); |
| 2609 | } |
| 2610 | |
| 2611 | init_Cursor (&c, cc->escn_debug_info, posn, cc->barf, |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2612 | "Overrun get_inlFnName absori"); |
| 2613 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2614 | abbv_code = get_ULEB128( &c ); |
| 2615 | abbv = get_abbv ( cc, abbv_code); |
| 2616 | atag = abbv->atag; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2617 | TRACE_D3(" <get_inlFnName><%lx>: Abbrev Number: %llu (%s)\n", |
| 2618 | posn, abbv_code, ML_(pp_DW_TAG)( atag ) ); |
| 2619 | |
| 2620 | if (atag == 0) |
| 2621 | cc->barf("get_inlFnName: invalid zero tag on DIE"); |
| 2622 | |
| 2623 | has_children = abbv->has_children; |
| 2624 | if (has_children != DW_children_no && has_children != DW_children_yes) |
| 2625 | cc->barf("get_inlFnName: invalid has_children value"); |
| 2626 | |
| 2627 | if (atag != DW_TAG_subprogram) |
| 2628 | cc->barf("get_inlFnName: absori not a subprogram"); |
| 2629 | |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 2630 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2631 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 2632 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 2633 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 2634 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2635 | if (attr == 0 && form == 0) break; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2636 | get_Form_contents( &cts, cc, &c, False/*td3*/, form ); |
| 2637 | if (attr == DW_AT_name) { |
| 2638 | HChar *fnname; |
| 2639 | if (cts.szB >= 0) |
| 2640 | cc->barf("get_inlFnName: expecting indirect string"); |
| 2641 | fnname = ML_(cur_read_strdup)( cts.u.cur, |
| 2642 | "get_inlFnName.1" ); |
| 2643 | ret = ML_(addStr)(cc->di, fnname, -1); |
| 2644 | ML_(dinfo_free) (fnname); |
philippe | 0ff1641 | 2014-06-21 12:41:48 +0000 | [diff] [blame] | 2645 | break; /* Name found, get out of the loop, as this has priority over |
| 2646 | DW_AT_specification. */ |
| 2647 | } |
| 2648 | if (attr == DW_AT_specification) { |
philippe | 6ae06ed | 2014-09-06 00:13:47 +0000 | [diff] [blame] | 2649 | UWord cdie; |
| 2650 | |
philippe | 0ff1641 | 2014-06-21 12:41:48 +0000 | [diff] [blame] | 2651 | if (cts.szB == 0) |
| 2652 | cc->barf("get_inlFnName: AT specification missing"); |
philippe | 6ae06ed | 2014-09-06 00:13:47 +0000 | [diff] [blame] | 2653 | |
| 2654 | /* The recursive call to get_inlFnName will uncook its arg. |
| 2655 | So, we need to cook it here, so as to reference the |
| 2656 | correct section (e.g. the alt info). */ |
| 2657 | cdie = cook_die_using_form(cc, (UWord)cts.u.val, form); |
| 2658 | |
philippe | 0ff1641 | 2014-06-21 12:41:48 +0000 | [diff] [blame] | 2659 | /* hoping that there is no loop */ |
philippe | 6ae06ed | 2014-09-06 00:13:47 +0000 | [diff] [blame] | 2660 | ret = get_inlFnName (cdie, cc, td3); |
| 2661 | /* Unclear if having both DW_AT_specification and DW_AT_name is |
philippe | 0ff1641 | 2014-06-21 12:41:48 +0000 | [diff] [blame] | 2662 | possible but in any case, we do not break here. |
| 2663 | If we find later on a DW_AT_name, it will override the name found |
| 2664 | in the DW_AT_specification.*/ |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2665 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2666 | } |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2667 | |
| 2668 | if (ret) |
| 2669 | return ret; |
philippe | 0ff1641 | 2014-06-21 12:41:48 +0000 | [diff] [blame] | 2670 | else { |
| 2671 | TRACE_D3("AbsOriFnNameNotFound"); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2672 | return ML_(addStr)(cc->di, "AbsOriFnNameNotFound", -1); |
philippe | 0ff1641 | 2014-06-21 12:41:48 +0000 | [diff] [blame] | 2673 | } |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2674 | } |
| 2675 | |
| 2676 | /* Returns True if the (possibly) childrens of the current DIE are interesting |
| 2677 | to parse. Returns False otherwise. |
| 2678 | If the current DIE has a sibling, the non interesting children can |
| 2679 | maybe be skipped (if the DIE has a DW_AT_sibling). */ |
| 2680 | __attribute__((noinline)) |
| 2681 | static Bool parse_inl_DIE ( |
| 2682 | /*MOD*/D3InlParser* parser, |
| 2683 | DW_TAG dtag, |
| 2684 | UWord posn, |
| 2685 | Int level, |
| 2686 | Cursor* c_die, |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 2687 | const g_abbv *abbv, |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2688 | CUConst* cc, |
| 2689 | Bool td3 |
| 2690 | ) |
| 2691 | { |
| 2692 | FormContents cts; |
| 2693 | UInt nf_i; |
| 2694 | |
| 2695 | UWord saved_die_c_offset = get_position_of_Cursor( c_die ); |
| 2696 | |
| 2697 | /* Get info about DW_TAG_compile_unit and DW_TAG_partial_unit 'which |
| 2698 | in theory could also contain inlined fn calls). */ |
| 2699 | if (dtag == DW_TAG_compile_unit || dtag == DW_TAG_partial_unit) { |
| 2700 | Bool have_lo = False; |
| 2701 | Addr ip_lo = 0; |
florian | 1ef70c6 | 2014-10-22 17:42:37 +0000 | [diff] [blame] | 2702 | const HChar *compdir = NULL; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2703 | |
| 2704 | nf_i = 0; |
| 2705 | while (True) { |
| 2706 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 2707 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 2708 | nf_i++; |
| 2709 | if (attr == 0 && form == 0) break; |
| 2710 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2711 | if (attr == DW_AT_low_pc && cts.szB > 0) { |
| 2712 | ip_lo = cts.u.val; |
| 2713 | have_lo = True; |
| 2714 | } |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2715 | if (attr == DW_AT_comp_dir) { |
| 2716 | if (cts.szB >= 0) |
| 2717 | cc->barf("parse_inl_DIE compdir: expecting indirect string"); |
| 2718 | HChar *str = ML_(cur_read_strdup)( cts.u.cur, |
| 2719 | "parse_inl_DIE.compdir" ); |
| 2720 | compdir = ML_(addStr)(cc->di, str, -1); |
| 2721 | ML_(dinfo_free) (str); |
| 2722 | } |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2723 | if (attr == DW_AT_stmt_list && cts.szB > 0) { |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2724 | read_filename_table( parser->fndn_ix_Table, compdir, |
| 2725 | cc, cts.u.val, td3 ); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2726 | } |
philippe | d16fb63 | 2014-06-16 21:49:42 +0000 | [diff] [blame] | 2727 | if (attr == DW_AT_sibling && cts.szB > 0) { |
| 2728 | parser->sibling = cts.u.val; |
| 2729 | } |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2730 | } |
| 2731 | if (level == 0) |
| 2732 | setup_cu_svma (cc, have_lo, ip_lo, td3); |
| 2733 | } |
| 2734 | |
| 2735 | if (dtag == DW_TAG_inlined_subroutine) { |
| 2736 | Bool have_lo = False; |
| 2737 | Bool have_hi1 = False; |
| 2738 | Bool have_range = False; |
| 2739 | Bool hiIsRelative = False; |
| 2740 | Addr ip_lo = 0; |
| 2741 | Addr ip_hi1 = 0; |
| 2742 | Addr rangeoff = 0; |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2743 | UInt caller_fndn_ix = 0; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2744 | Int caller_lineno = 0; |
| 2745 | Int inlinedfn_abstract_origin = 0; |
| 2746 | |
| 2747 | nf_i = 0; |
| 2748 | while (True) { |
| 2749 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 2750 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 2751 | nf_i++; |
| 2752 | if (attr == 0 && form == 0) break; |
| 2753 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 2754 | if (attr == DW_AT_call_file && cts.szB > 0) { |
| 2755 | Int ftabIx = (Int)cts.u.val; |
| 2756 | if (ftabIx >= 1 |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2757 | && ftabIx < VG_(sizeXA)( parser->fndn_ix_Table )) { |
| 2758 | caller_fndn_ix = *(UInt*) |
| 2759 | VG_(indexXA)( parser->fndn_ix_Table, ftabIx ); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2760 | } |
florian | c6e5d76 | 2015-08-05 22:27:24 +0000 | [diff] [blame] | 2761 | if (0) VG_(printf)("XXX caller_fndn_ix = %u %s\n", caller_fndn_ix, |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2762 | ML_(fndn_ix2filename) (cc->di, caller_fndn_ix)); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2763 | } |
| 2764 | if (attr == DW_AT_call_line && cts.szB > 0) { |
| 2765 | caller_lineno = cts.u.val; |
| 2766 | } |
| 2767 | |
| 2768 | if (attr == DW_AT_abstract_origin && cts.szB > 0) { |
philippe | 6ae06ed | 2014-09-06 00:13:47 +0000 | [diff] [blame] | 2769 | inlinedfn_abstract_origin |
| 2770 | = cook_die_using_form (cc, (UWord)cts.u.val, form); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2771 | } |
| 2772 | |
| 2773 | if (attr == DW_AT_low_pc && cts.szB > 0) { |
| 2774 | ip_lo = cts.u.val; |
| 2775 | have_lo = True; |
| 2776 | } |
| 2777 | if (attr == DW_AT_high_pc && cts.szB > 0) { |
| 2778 | ip_hi1 = cts.u.val; |
| 2779 | have_hi1 = True; |
| 2780 | if (form != DW_FORM_addr) |
| 2781 | hiIsRelative = True; |
| 2782 | } |
| 2783 | if (attr == DW_AT_ranges && cts.szB > 0) { |
| 2784 | rangeoff = cts.u.val; |
| 2785 | have_range = True; |
| 2786 | } |
philippe | d16fb63 | 2014-06-16 21:49:42 +0000 | [diff] [blame] | 2787 | if (attr == DW_AT_sibling && cts.szB > 0) { |
| 2788 | parser->sibling = cts.u.val; |
| 2789 | } |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2790 | } |
| 2791 | if (have_lo && have_hi1 && hiIsRelative) |
| 2792 | ip_hi1 += ip_lo; |
| 2793 | /* Do we have something that looks sane? */ |
| 2794 | if (dtag == DW_TAG_inlined_subroutine |
| 2795 | && (!have_lo) && (!have_hi1) && (!have_range)) { |
| 2796 | /* Seems strange. How can an inlined subroutine have |
| 2797 | no code ? */ |
| 2798 | goto_bad_DIE; |
| 2799 | } else |
| 2800 | if (have_lo && have_hi1 && (!have_range)) { |
| 2801 | /* This inlined call is just a single address range. */ |
| 2802 | if (ip_lo < ip_hi1) { |
philippe | e2d41dc | 2014-07-08 18:56:47 +0000 | [diff] [blame] | 2803 | /* Apply text debug biasing */ |
| 2804 | ip_lo += cc->di->text_debug_bias; |
| 2805 | ip_hi1 += cc->di->text_debug_bias; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2806 | ML_(addInlInfo) (cc->di, |
| 2807 | ip_lo, ip_hi1, |
| 2808 | get_inlFnName (inlinedfn_abstract_origin, cc, td3), |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2809 | caller_fndn_ix, |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2810 | caller_lineno, level); |
| 2811 | } |
| 2812 | } else if (have_range) { |
| 2813 | /* This inlined call is several address ranges. */ |
| 2814 | XArray *ranges; |
| 2815 | Word j; |
florian | 1ef70c6 | 2014-10-22 17:42:37 +0000 | [diff] [blame] | 2816 | const HChar *inlfnname = |
| 2817 | get_inlFnName (inlinedfn_abstract_origin, cc, td3); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2818 | |
philippe | 8b662d5 | 2014-08-05 19:34:35 +0000 | [diff] [blame] | 2819 | /* Ranges are biased for the inline info using the same logic |
| 2820 | as what is used for biasing ranges for the var info, for which |
| 2821 | ranges are read using cc->cu_svma (see parse_var_DIE). |
| 2822 | Then text_debug_bias is added when a (non global) var |
| 2823 | is recorded (see just before the call to ML_(addVar)) */ |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2824 | ranges = get_range_list( cc, td3, |
| 2825 | rangeoff, cc->cu_svma ); |
| 2826 | for (j = 0; j < VG_(sizeXA)( ranges ); j++) { |
| 2827 | AddrRange* range = (AddrRange*) VG_(indexXA)( ranges, j ); |
| 2828 | ML_(addInlInfo) (cc->di, |
philippe | 8b662d5 | 2014-08-05 19:34:35 +0000 | [diff] [blame] | 2829 | range->aMin + cc->di->text_debug_bias, |
| 2830 | range->aMax+1 + cc->di->text_debug_bias, |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2831 | // aMax+1 as range has its last bound included |
| 2832 | // while ML_(addInlInfo) expects last bound not |
| 2833 | // included. |
| 2834 | inlfnname, |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 2835 | caller_fndn_ix, |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2836 | caller_lineno, level); |
| 2837 | } |
| 2838 | VG_(deleteXA)( ranges ); |
| 2839 | } else |
| 2840 | goto_bad_DIE; |
| 2841 | } |
| 2842 | |
| 2843 | // Only recursively parse the (possible) children for the DIE which |
| 2844 | // might maybe contain a DW_TAG_inlined_subroutine: |
| 2845 | return dtag == DW_TAG_lexical_block || dtag == DW_TAG_subprogram |
| 2846 | || dtag == DW_TAG_inlined_subroutine |
| 2847 | || dtag == DW_TAG_compile_unit || dtag == DW_TAG_partial_unit; |
| 2848 | |
| 2849 | bad_DIE: |
philippe | 896a3bf | 2014-06-15 21:49:13 +0000 | [diff] [blame] | 2850 | dump_bad_die_and_barf("parse_inl_DIE", dtag, posn, level, |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 2851 | c_die, saved_die_c_offset, |
| 2852 | abbv, |
| 2853 | cc); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2854 | /*NOTREACHED*/ |
| 2855 | } |
| 2856 | |
| 2857 | |
| 2858 | /*------------------------------------------------------------*/ |
| 2859 | /*--- ---*/ |
| 2860 | /*--- Parsing of type-related DIEs ---*/ |
| 2861 | /*--- ---*/ |
| 2862 | /*------------------------------------------------------------*/ |
| 2863 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2864 | typedef |
| 2865 | struct { |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 2866 | /* What source language? 'A'=Ada83/95, |
| 2867 | 'C'=C/C++, |
| 2868 | 'F'=Fortran, |
| 2869 | '?'=other |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2870 | Established once per compilation unit. */ |
| 2871 | UChar language; |
| 2872 | /* A stack of types which are currently under construction */ |
| 2873 | Int sp; /* [sp] is innermost active entry; sp==-1 for empty |
| 2874 | stack */ |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 2875 | Int stack_size; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2876 | /* Note that the TyEnts in qparentE are temporary copies of the |
| 2877 | ones accumulating in the main tyent array. So it is not safe |
| 2878 | to free up anything on them when popping them off the stack |
| 2879 | (iow, it isn't safe to use TyEnt__make_EMPTY on them). Just |
| 2880 | memset them to zero when done. */ |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 2881 | TyEnt *qparentE; /* parent TyEnts */ |
| 2882 | Int *qlevel; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2883 | } |
| 2884 | D3TypeParser; |
| 2885 | |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 2886 | /* Completely initialise a type parser object */ |
| 2887 | static void |
| 2888 | type_parser_init ( D3TypeParser *parser ) |
| 2889 | { |
| 2890 | parser->sp = -1; |
| 2891 | parser->language = '?'; |
| 2892 | parser->stack_size = 0; |
| 2893 | parser->qparentE = NULL; |
| 2894 | parser->qlevel = NULL; |
| 2895 | } |
| 2896 | |
| 2897 | /* Release any memory hanging off a type parser object */ |
| 2898 | static void |
| 2899 | type_parser_release ( D3TypeParser *parser ) |
| 2900 | { |
| 2901 | ML_(dinfo_free)( parser->qparentE ); |
| 2902 | ML_(dinfo_free)( parser->qlevel ); |
| 2903 | } |
| 2904 | |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 2905 | static void typestack_show ( const D3TypeParser* parser, const HChar* str ) |
| 2906 | { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2907 | Word i; |
| 2908 | VG_(printf)(" typestack (%s) {\n", str); |
| 2909 | for (i = 0; i <= parser->sp; i++) { |
| 2910 | VG_(printf)(" [%ld] (level %d): ", i, parser->qlevel[i]); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2911 | ML_(pp_TyEnt)( &parser->qparentE[i] ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2912 | VG_(printf)("\n"); |
| 2913 | } |
| 2914 | VG_(printf)(" }\n"); |
| 2915 | } |
| 2916 | |
| 2917 | /* Remove from the stack, all entries with .level > 'level' */ |
| 2918 | static |
| 2919 | void typestack_preen ( D3TypeParser* parser, Bool td3, Int level ) |
| 2920 | { |
| 2921 | Bool changed = False; |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 2922 | vg_assert(parser->sp < parser->stack_size); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2923 | while (True) { |
| 2924 | vg_assert(parser->sp >= -1); |
| 2925 | if (parser->sp == -1) break; |
| 2926 | if (parser->qlevel[parser->sp] <= level) break; |
| 2927 | if (0) |
| 2928 | TRACE_D3("BBBBAAAA typestack_pop [newsp=%d]\n", parser->sp-1); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2929 | vg_assert(ML_(TyEnt__is_type)(&parser->qparentE[parser->sp])); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2930 | parser->sp--; |
| 2931 | changed = True; |
| 2932 | } |
| 2933 | if (changed && td3) |
| 2934 | typestack_show( parser, "after preen" ); |
| 2935 | } |
| 2936 | |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 2937 | static Bool typestack_is_empty ( const D3TypeParser* parser ) |
| 2938 | { |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 2939 | vg_assert(parser->sp >= -1 && parser->sp < parser->stack_size); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2940 | return parser->sp == -1; |
| 2941 | } |
| 2942 | |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 2943 | static void typestack_push ( const CUConst* cc, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2944 | D3TypeParser* parser, |
| 2945 | Bool td3, |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 2946 | const TyEnt* parentE, Int level ) |
florian | 3297124 | 2014-10-23 17:47:15 +0000 | [diff] [blame] | 2947 | { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2948 | if (0) |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2949 | TRACE_D3("BBBBAAAA typestack_push[newsp=%d]: %d %05lx\n", |
| 2950 | parser->sp+1, level, parentE->cuOff); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2951 | |
| 2952 | /* First we need to zap everything >= 'level', as we are about to |
| 2953 | replace any previous entry at 'level', so .. */ |
| 2954 | typestack_preen(parser, /*td3*/False, level-1); |
| 2955 | |
| 2956 | vg_assert(parser->sp >= -1); |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 2957 | vg_assert(parser->sp < parser->stack_size); |
| 2958 | if (parser->sp == parser->stack_size - 1) { |
| 2959 | parser->stack_size += 16; |
| 2960 | parser->qparentE = |
| 2961 | ML_(dinfo_realloc)("di.readdwarf3.typush.1", parser->qparentE, |
| 2962 | parser->stack_size * sizeof parser->qparentE[0]); |
| 2963 | parser->qlevel = |
| 2964 | ML_(dinfo_realloc)("di.readdwarf3.typush.2", parser->qlevel, |
| 2965 | parser->stack_size * sizeof parser->qlevel[0]); |
| 2966 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2967 | if (parser->sp >= 0) |
| 2968 | vg_assert(parser->qlevel[parser->sp] < level); |
| 2969 | parser->sp++; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 2970 | vg_assert(parentE); |
| 2971 | vg_assert(ML_(TyEnt__is_type)(parentE)); |
| 2972 | vg_assert(parentE->cuOff != D3_INVALID_CUOFF); |
| 2973 | parser->qparentE[parser->sp] = *parentE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2974 | parser->qlevel[parser->sp] = level; |
philippe | e0bd591 | 2014-06-21 09:48:17 +0000 | [diff] [blame] | 2975 | if (TD3) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2976 | typestack_show( parser, "after push" ); |
| 2977 | } |
| 2978 | |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 2979 | /* True if the subrange type being parsed gives the bounds of an array. */ |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 2980 | static Bool subrange_type_denotes_array_bounds ( const D3TypeParser* parser, |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 2981 | DW_TAG dtag ) { |
| 2982 | vg_assert(dtag == DW_TAG_subrange_type); |
| 2983 | /* For most languages, a subrange_type dtag always gives the |
| 2984 | bounds of an array. |
| 2985 | For Ada, there are additional conditions as a subrange_type |
| 2986 | is also used for other purposes. */ |
| 2987 | if (parser->language != 'A') |
| 2988 | /* not Ada, so it definitely denotes an array bound. */ |
| 2989 | return True; |
| 2990 | else |
| 2991 | /* Extra constraints for Ada: it only denotes an array bound if .. */ |
| 2992 | return (! typestack_is_empty(parser) |
| 2993 | && parser->qparentE[parser->sp].tag == Te_TyArray); |
| 2994 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 2995 | |
| 2996 | /* Parse a type-related DIE. 'parser' holds the current parser state. |
| 2997 | 'admin' is where the completed types are dumped. 'dtag' is the tag |
| 2998 | for this DIE. 'c_die' points to the start of the data fields (FORM |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 2999 | stuff) for the DIE. abbv is the parsed abbreviation which describe |
| 3000 | the DIE. |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3001 | |
| 3002 | We may find the DIE uninteresting, in which case we should ignore |
| 3003 | it. |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3004 | |
| 3005 | What happens: the DIE is examined. If uninteresting, it is ignored. |
| 3006 | Otherwise, the DIE gives rise to two things: |
| 3007 | |
| 3008 | (1) the offset of this DIE in the CU -- the cuOffset, a UWord |
| 3009 | (2) a TyAdmin structure, which holds the type, or related stuff |
| 3010 | |
| 3011 | (2) is added at the end of 'tyadmins', at some index, say 'i'. |
| 3012 | |
| 3013 | A pair (cuOffset, i) is added to 'tydict'. |
| 3014 | |
| 3015 | Hence 'tyadmins' holds the actual type entities, and 'tydict' holds |
| 3016 | a mapping from cuOffset to the index of the corresponding entry in |
| 3017 | 'tyadmin'. |
| 3018 | |
| 3019 | When resolving a cuOffset to a TyAdmin, first look up the cuOffset |
| 3020 | in the tydict (by binary search). This gives an index into |
| 3021 | tyadmins, and the required entity lives in tyadmins at that index. |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3022 | */ |
| 3023 | __attribute__((noinline)) |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3024 | static void parse_type_DIE ( /*MOD*/XArray* /* of TyEnt */ tyents, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3025 | /*MOD*/D3TypeParser* parser, |
| 3026 | DW_TAG dtag, |
| 3027 | UWord posn, |
| 3028 | Int level, |
| 3029 | Cursor* c_die, |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 3030 | const g_abbv *abbv, |
| 3031 | const CUConst* cc, |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3032 | Bool td3 ) |
| 3033 | { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3034 | FormContents cts; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 3035 | UInt nf_i; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3036 | TyEnt typeE; |
| 3037 | TyEnt atomE; |
| 3038 | TyEnt fieldE; |
| 3039 | TyEnt boundE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3040 | |
| 3041 | UWord saved_die_c_offset = get_position_of_Cursor( c_die ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3042 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3043 | VG_(memset)( &typeE, 0xAA, sizeof(typeE) ); |
| 3044 | VG_(memset)( &atomE, 0xAA, sizeof(atomE) ); |
| 3045 | VG_(memset)( &fieldE, 0xAA, sizeof(fieldE) ); |
| 3046 | VG_(memset)( &boundE, 0xAA, sizeof(boundE) ); |
| 3047 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3048 | /* If we've returned to a level at or above any previously noted |
| 3049 | parent, un-note it, so we don't believe we're still collecting |
| 3050 | its children. */ |
| 3051 | typestack_preen( parser, td3, level-1 ); |
| 3052 | |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 3053 | if (dtag == DW_TAG_compile_unit |
| 3054 | || dtag == DW_TAG_type_unit |
| 3055 | || dtag == DW_TAG_partial_unit) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3056 | /* See if we can find DW_AT_language, since it is important for |
| 3057 | establishing array bounds (see DW_TAG_subrange_type below in |
| 3058 | this fn) */ |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3059 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3060 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3061 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 3062 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 3063 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3064 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3065 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3066 | if (attr != DW_AT_language) |
| 3067 | continue; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3068 | if (cts.szB <= 0) |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3069 | goto_bad_DIE; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3070 | switch (cts.u.val) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3071 | case DW_LANG_C89: case DW_LANG_C: |
| 3072 | case DW_LANG_C_plus_plus: case DW_LANG_ObjC: |
| 3073 | case DW_LANG_ObjC_plus_plus: case DW_LANG_UPC: |
mjw | b527a5b | 2014-11-26 15:43:14 +0000 | [diff] [blame] | 3074 | case DW_LANG_Upc: case DW_LANG_C99: case DW_LANG_C11: |
| 3075 | case DW_LANG_C_plus_plus_11: case DW_LANG_C_plus_plus_14: |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3076 | parser->language = 'C'; break; |
| 3077 | case DW_LANG_Fortran77: case DW_LANG_Fortran90: |
mjw | ebb8893 | 2015-02-09 20:41:48 +0000 | [diff] [blame] | 3078 | case DW_LANG_Fortran95: case DW_LANG_Fortran03: |
| 3079 | case DW_LANG_Fortran08: |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3080 | parser->language = 'F'; break; |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 3081 | case DW_LANG_Ada83: case DW_LANG_Ada95: |
| 3082 | parser->language = 'A'; break; |
| 3083 | case DW_LANG_Cobol74: |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3084 | case DW_LANG_Cobol85: case DW_LANG_Pascal83: |
| 3085 | case DW_LANG_Modula2: case DW_LANG_Java: |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 3086 | case DW_LANG_PLI: |
mjw | b527a5b | 2014-11-26 15:43:14 +0000 | [diff] [blame] | 3087 | case DW_LANG_D: case DW_LANG_Python: case DW_LANG_Go: |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3088 | case DW_LANG_Mips_Assembler: |
| 3089 | parser->language = '?'; break; |
| 3090 | default: |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3091 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3092 | } |
| 3093 | } |
| 3094 | } |
| 3095 | |
| 3096 | if (dtag == DW_TAG_base_type) { |
| 3097 | /* We can pick up a new base type any time. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3098 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 3099 | typeE.cuOff = D3_INVALID_CUOFF; |
| 3100 | typeE.tag = Te_TyBase; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3101 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3102 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3103 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 3104 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 3105 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3106 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3107 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 3108 | if (attr == DW_AT_name && cts.szB < 0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3109 | typeE.Te.TyBase.name |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3110 | = ML_(cur_read_strdup)( cts.u.cur, |
| 3111 | "di.readdwarf3.ptD.base_type.1" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3112 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3113 | if (attr == DW_AT_byte_size && cts.szB > 0) { |
| 3114 | typeE.Te.TyBase.szB = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3115 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3116 | if (attr == DW_AT_encoding && cts.szB > 0) { |
| 3117 | switch (cts.u.val) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3118 | case DW_ATE_unsigned: case DW_ATE_unsigned_char: |
tom | 50c5093 | 2010-10-18 14:57:58 +0000 | [diff] [blame] | 3119 | case DW_ATE_UTF: /* since DWARF4, e.g. char16_t from C++ */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3120 | case DW_ATE_boolean:/* FIXME - is this correct? */ |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 3121 | case DW_ATE_unsigned_fixed: |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3122 | typeE.Te.TyBase.enc = 'U'; break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3123 | case DW_ATE_signed: case DW_ATE_signed_char: |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 3124 | case DW_ATE_signed_fixed: |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3125 | typeE.Te.TyBase.enc = 'S'; break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3126 | case DW_ATE_float: |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3127 | typeE.Te.TyBase.enc = 'F'; break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3128 | case DW_ATE_complex_float: |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3129 | typeE.Te.TyBase.enc = 'C'; break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3130 | default: |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3131 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3132 | } |
| 3133 | } |
| 3134 | } |
| 3135 | |
| 3136 | /* Invent a name if it doesn't have one. gcc-4.3 |
| 3137 | -ftree-vectorize is observed to emit nameless base types. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3138 | if (!typeE.Te.TyBase.name) |
| 3139 | typeE.Te.TyBase.name |
| 3140 | = ML_(dinfo_strdup)( "di.readdwarf3.ptD.base_type.2", |
| 3141 | "<anon_base_type>" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3142 | |
| 3143 | /* Do we have something that looks sane? */ |
| 3144 | if (/* must have a name */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3145 | typeE.Te.TyBase.name == NULL |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3146 | /* and a plausible size. Yes, really 32: "complex long |
| 3147 | double" apparently has size=32 */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3148 | || typeE.Te.TyBase.szB < 0 || typeE.Te.TyBase.szB > 32 |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3149 | /* and a plausible encoding */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3150 | || (typeE.Te.TyBase.enc != 'U' |
| 3151 | && typeE.Te.TyBase.enc != 'S' |
| 3152 | && typeE.Te.TyBase.enc != 'F' |
| 3153 | && typeE.Te.TyBase.enc != 'C')) |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3154 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3155 | /* Last minute hack: if we see this |
| 3156 | <1><515>: DW_TAG_base_type |
| 3157 | DW_AT_byte_size : 0 |
| 3158 | DW_AT_encoding : 5 |
| 3159 | DW_AT_name : void |
| 3160 | convert it into a real Void type. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3161 | if (typeE.Te.TyBase.szB == 0 |
| 3162 | && 0 == VG_(strcmp)("void", typeE.Te.TyBase.name)) { |
| 3163 | ML_(TyEnt__make_EMPTY)(&typeE); |
| 3164 | typeE.tag = Te_TyVoid; |
| 3165 | typeE.Te.TyVoid.isFake = False; /* it's a real one! */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3166 | } |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3167 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3168 | goto acquire_Type; |
| 3169 | } |
| 3170 | |
bart | 0e947cf | 2012-02-01 14:59:14 +0000 | [diff] [blame] | 3171 | /* |
| 3172 | * An example of DW_TAG_rvalue_reference_type: |
| 3173 | * |
| 3174 | * $ readelf --debug-dump /usr/lib/debug/usr/lib/libstdc++.so.6.0.16.debug |
| 3175 | * <1><1014>: Abbrev Number: 55 (DW_TAG_rvalue_reference_type) |
| 3176 | * <1015> DW_AT_byte_size : 4 |
| 3177 | * <1016> DW_AT_type : <0xe52> |
| 3178 | */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3179 | if (dtag == DW_TAG_pointer_type || dtag == DW_TAG_reference_type |
bart | 0e947cf | 2012-02-01 14:59:14 +0000 | [diff] [blame] | 3180 | || dtag == DW_TAG_ptr_to_member_type |
| 3181 | || dtag == DW_TAG_rvalue_reference_type) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3182 | /* This seems legit for _pointer_type and _reference_type. I |
| 3183 | don't know if rolling _ptr_to_member_type in here really is |
| 3184 | legit, but it's better than not handling it at all. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3185 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 3186 | typeE.cuOff = D3_INVALID_CUOFF; |
bart | 0e947cf | 2012-02-01 14:59:14 +0000 | [diff] [blame] | 3187 | switch (dtag) { |
| 3188 | case DW_TAG_pointer_type: |
| 3189 | typeE.tag = Te_TyPtr; |
| 3190 | break; |
| 3191 | case DW_TAG_reference_type: |
| 3192 | typeE.tag = Te_TyRef; |
| 3193 | break; |
| 3194 | case DW_TAG_ptr_to_member_type: |
| 3195 | typeE.tag = Te_TyPtrMbr; |
| 3196 | break; |
| 3197 | case DW_TAG_rvalue_reference_type: |
| 3198 | typeE.tag = Te_TyRvalRef; |
| 3199 | break; |
| 3200 | default: |
| 3201 | vg_assert(False); |
| 3202 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3203 | /* target type defaults to void */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3204 | typeE.Te.TyPorR.typeR = D3_FAKEVOID_CUOFF; |
bart | 0e947cf | 2012-02-01 14:59:14 +0000 | [diff] [blame] | 3205 | /* These four type kinds don't *have* to specify their size, in |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 3206 | which case we assume it's a machine word. But if they do |
| 3207 | specify it, it must be a machine word :-) This probably |
| 3208 | assumes that the word size of the Dwarf3 we're reading is the |
| 3209 | same size as that on the machine. gcc appears to give a size |
| 3210 | whereas icc9 doesn't. */ |
| 3211 | typeE.Te.TyPorR.szB = sizeof(UWord); |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3212 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3213 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3214 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 3215 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 3216 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3217 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3218 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 3219 | if (attr == DW_AT_byte_size && cts.szB > 0) { |
| 3220 | typeE.Te.TyPorR.szB = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3221 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3222 | if (attr == DW_AT_type && cts.szB > 0) { |
| 3223 | typeE.Te.TyPorR.typeR |
| 3224 | = cook_die_using_form( cc, (UWord)cts.u.val, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3225 | } |
| 3226 | } |
| 3227 | /* Do we have something that looks sane? */ |
sewardj | 3145230 | 2009-01-25 23:50:32 +0000 | [diff] [blame] | 3228 | if (typeE.Te.TyPorR.szB != sizeof(UWord)) |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3229 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3230 | else |
| 3231 | goto acquire_Type; |
| 3232 | } |
| 3233 | |
| 3234 | if (dtag == DW_TAG_enumeration_type) { |
| 3235 | /* Create a new Type to hold the results. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3236 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 3237 | typeE.cuOff = posn; |
| 3238 | typeE.tag = Te_TyEnum; |
mjw | 9d82d0f | 2013-06-28 14:03:58 +0000 | [diff] [blame] | 3239 | Bool is_decl = False; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3240 | typeE.Te.TyEnum.atomRs |
| 3241 | = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.ptD.enum_type.1", |
| 3242 | ML_(dinfo_free), |
| 3243 | sizeof(UWord) ); |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3244 | nf_i=0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3245 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3246 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 3247 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 3248 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3249 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3250 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 3251 | if (attr == DW_AT_name && cts.szB < 0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3252 | typeE.Te.TyEnum.name |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3253 | = ML_(cur_read_strdup)( cts.u.cur, |
| 3254 | "di.readdwarf3.pTD.enum_type.2" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3255 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3256 | if (attr == DW_AT_byte_size && cts.szB > 0) { |
| 3257 | typeE.Te.TyEnum.szB = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3258 | } |
mjw | 9d82d0f | 2013-06-28 14:03:58 +0000 | [diff] [blame] | 3259 | if (attr == DW_AT_declaration) { |
| 3260 | is_decl = True; |
| 3261 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3262 | } |
sewardj | 6ece231 | 2009-01-24 01:44:15 +0000 | [diff] [blame] | 3263 | |
| 3264 | if (!typeE.Te.TyEnum.name) |
| 3265 | typeE.Te.TyEnum.name |
| 3266 | = ML_(dinfo_strdup)( "di.readdwarf3.pTD.enum_type.3", |
| 3267 | "<anon_enum_type>" ); |
| 3268 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3269 | /* Do we have something that looks sane? */ |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 3270 | if (typeE.Te.TyEnum.szB == 0 |
| 3271 | /* we must know the size */ |
| 3272 | /* but not for Ada, which uses such dummy |
mjw | 9d82d0f | 2013-06-28 14:03:58 +0000 | [diff] [blame] | 3273 | enumerations as helper for gdb ada mode. |
| 3274 | Also GCC allows incomplete enums as GNU extension. |
| 3275 | http://gcc.gnu.org/onlinedocs/gcc/Incomplete-Enums.html |
| 3276 | These are marked as DW_AT_declaration and won't have |
| 3277 | a size. They can only be used in declaration or as |
| 3278 | pointer types. You can't allocate variables or storage |
| 3279 | using such an enum type. (Also GCC seems to have a bug |
| 3280 | that will put such an enumeration_type into a .debug_types |
| 3281 | unit which should only contain complete types.) */ |
| 3282 | && (parser->language != 'A' && !is_decl)) { |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3283 | goto_bad_DIE; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 3284 | } |
| 3285 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3286 | /* On't stack! */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3287 | typestack_push( cc, parser, td3, &typeE, level ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3288 | goto acquire_Type; |
| 3289 | } |
| 3290 | |
sewardj | f3aaa33 | 2008-10-23 10:54:40 +0000 | [diff] [blame] | 3291 | /* gcc (GCC) 4.4.0 20081017 (experimental) occasionally produces |
| 3292 | DW_TAG_enumerator with only a DW_AT_name but no |
| 3293 | DW_AT_const_value. This is in violation of the Dwarf3 standard, |
| 3294 | and appears to be a new "feature" of gcc - versions 4.3.x and |
| 3295 | earlier do not appear to do this. So accept DW_TAG_enumerator |
| 3296 | which only have a name but no value. An example: |
| 3297 | |
| 3298 | <1><180>: Abbrev Number: 6 (DW_TAG_enumeration_type) |
| 3299 | <181> DW_AT_name : (indirect string, offset: 0xda70): |
| 3300 | QtMsgType |
| 3301 | <185> DW_AT_byte_size : 4 |
| 3302 | <186> DW_AT_decl_file : 14 |
| 3303 | <187> DW_AT_decl_line : 1480 |
| 3304 | <189> DW_AT_sibling : <0x1a7> |
| 3305 | <2><18d>: Abbrev Number: 7 (DW_TAG_enumerator) |
| 3306 | <18e> DW_AT_name : (indirect string, offset: 0x9e18): |
| 3307 | QtDebugMsg |
| 3308 | <2><192>: Abbrev Number: 7 (DW_TAG_enumerator) |
| 3309 | <193> DW_AT_name : (indirect string, offset: 0x1505f): |
| 3310 | QtWarningMsg |
| 3311 | <2><197>: Abbrev Number: 7 (DW_TAG_enumerator) |
| 3312 | <198> DW_AT_name : (indirect string, offset: 0x16f4a): |
| 3313 | QtCriticalMsg |
| 3314 | <2><19c>: Abbrev Number: 7 (DW_TAG_enumerator) |
| 3315 | <19d> DW_AT_name : (indirect string, offset: 0x156dd): |
| 3316 | QtFatalMsg |
| 3317 | <2><1a1>: Abbrev Number: 7 (DW_TAG_enumerator) |
| 3318 | <1a2> DW_AT_name : (indirect string, offset: 0x13660): |
| 3319 | QtSystemMsg |
| 3320 | */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3321 | if (dtag == DW_TAG_enumerator) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3322 | VG_(memset)( &atomE, 0, sizeof(atomE) ); |
| 3323 | atomE.cuOff = posn; |
| 3324 | atomE.tag = Te_Atom; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3325 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3326 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3327 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 3328 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 3329 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3330 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3331 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 3332 | if (attr == DW_AT_name && cts.szB < 0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3333 | atomE.Te.Atom.name |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3334 | = ML_(cur_read_strdup)( cts.u.cur, |
| 3335 | "di.readdwarf3.pTD.enumerator.1" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3336 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3337 | if (attr == DW_AT_const_value && cts.szB > 0) { |
| 3338 | atomE.Te.Atom.value = cts.u.val; |
sewardj | f3aaa33 | 2008-10-23 10:54:40 +0000 | [diff] [blame] | 3339 | atomE.Te.Atom.valueKnown = True; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3340 | } |
| 3341 | } |
| 3342 | /* Do we have something that looks sane? */ |
sewardj | f3aaa33 | 2008-10-23 10:54:40 +0000 | [diff] [blame] | 3343 | if (atomE.Te.Atom.name == NULL) |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3344 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3345 | /* Do we have a plausible parent? */ |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3346 | if (typestack_is_empty(parser)) goto_bad_DIE; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3347 | vg_assert(ML_(TyEnt__is_type)(&parser->qparentE[parser->sp])); |
| 3348 | vg_assert(parser->qparentE[parser->sp].cuOff != D3_INVALID_CUOFF); |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3349 | if (level != parser->qlevel[parser->sp]+1) goto_bad_DIE; |
| 3350 | if (parser->qparentE[parser->sp].tag != Te_TyEnum) goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3351 | /* Record this child in the parent */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3352 | vg_assert(parser->qparentE[parser->sp].Te.TyEnum.atomRs); |
| 3353 | VG_(addToXA)( parser->qparentE[parser->sp].Te.TyEnum.atomRs, |
| 3354 | &atomE ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3355 | /* And record the child itself */ |
| 3356 | goto acquire_Atom; |
| 3357 | } |
| 3358 | |
sewardj | 6a3a284 | 2008-08-20 08:14:07 +0000 | [diff] [blame] | 3359 | /* Treat DW_TAG_class_type as if it was a DW_TAG_structure_type. I |
| 3360 | don't know if this is correct, but it at least makes this reader |
| 3361 | usable for gcc-4.3 produced Dwarf3. */ |
| 3362 | if (dtag == DW_TAG_structure_type || dtag == DW_TAG_class_type |
| 3363 | || dtag == DW_TAG_union_type) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3364 | Bool have_szB = False; |
| 3365 | Bool is_decl = False; |
| 3366 | Bool is_spec = False; |
| 3367 | /* Create a new Type to hold the results. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3368 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 3369 | typeE.cuOff = posn; |
| 3370 | typeE.tag = Te_TyStOrUn; |
| 3371 | typeE.Te.TyStOrUn.name = NULL; |
dejanj | 0abc419 | 2014-04-04 10:20:03 +0000 | [diff] [blame] | 3372 | typeE.Te.TyStOrUn.typeR = D3_INVALID_CUOFF; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3373 | typeE.Te.TyStOrUn.fieldRs |
| 3374 | = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.pTD.struct_type.1", |
| 3375 | ML_(dinfo_free), |
| 3376 | sizeof(UWord) ); |
| 3377 | typeE.Te.TyStOrUn.complete = True; |
| 3378 | typeE.Te.TyStOrUn.isStruct = dtag == DW_TAG_structure_type |
| 3379 | || dtag == DW_TAG_class_type; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3380 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3381 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3382 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 3383 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 3384 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3385 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3386 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 3387 | if (attr == DW_AT_name && cts.szB < 0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3388 | typeE.Te.TyStOrUn.name |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3389 | = ML_(cur_read_strdup)( cts.u.cur, |
| 3390 | "di.readdwarf3.ptD.struct_type.2" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3391 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3392 | if (attr == DW_AT_byte_size && cts.szB >= 0) { |
| 3393 | typeE.Te.TyStOrUn.szB = cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3394 | have_szB = True; |
| 3395 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3396 | if (attr == DW_AT_declaration && cts.szB > 0 && cts.u.val > 0) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3397 | is_decl = True; |
| 3398 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3399 | if (attr == DW_AT_specification && cts.szB > 0 && cts.u.val > 0) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3400 | is_spec = True; |
| 3401 | } |
dejanj | 0abc419 | 2014-04-04 10:20:03 +0000 | [diff] [blame] | 3402 | if (attr == DW_AT_signature && form == DW_FORM_ref_sig8 |
| 3403 | && cts.szB > 0) { |
| 3404 | have_szB = True; |
| 3405 | typeE.Te.TyStOrUn.szB = 8; |
| 3406 | typeE.Te.TyStOrUn.typeR |
| 3407 | = cook_die_using_form( cc, (UWord)cts.u.val, form ); |
| 3408 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3409 | } |
| 3410 | /* Do we have something that looks sane? */ |
| 3411 | if (is_decl && (!is_spec)) { |
| 3412 | /* It's a DW_AT_declaration. We require the name but |
| 3413 | nothing else. */ |
florian | ad4e979 | 2015-07-05 21:53:33 +0000 | [diff] [blame] | 3414 | /* JRS 2012-06-28: following discussion w/ tromey, if the |
sewardj | 0088888 | 2012-06-30 20:21:58 +0000 | [diff] [blame] | 3415 | type doesn't have name, just make one up, and accept it. |
| 3416 | It might be referred to by other DIEs, so ignoring it |
| 3417 | doesn't seem like a safe option. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3418 | if (typeE.Te.TyStOrUn.name == NULL) |
sewardj | 0088888 | 2012-06-30 20:21:58 +0000 | [diff] [blame] | 3419 | typeE.Te.TyStOrUn.name |
| 3420 | = ML_(dinfo_strdup)( "di.readdwarf3.ptD.struct_type.3", |
| 3421 | "<anon_struct_type>" ); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3422 | typeE.Te.TyStOrUn.complete = False; |
sewardj | b34bb1d | 2009-08-10 18:59:54 +0000 | [diff] [blame] | 3423 | /* JRS 2009 Aug 10: <possible kludge>? */ |
| 3424 | /* Push this tyent on the stack, even though it's incomplete. |
| 3425 | It appears that gcc-4.4 on Fedora 11 will sometimes create |
| 3426 | DW_TAG_member entries for it, and so we need to have a |
| 3427 | plausible parent present in order for that to work. See |
| 3428 | #200029 comments 8 and 9. */ |
| 3429 | typestack_push( cc, parser, td3, &typeE, level ); |
| 3430 | /* </possible kludge> */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3431 | goto acquire_Type; |
| 3432 | } |
| 3433 | if ((!is_decl) /* && (!is_spec) */) { |
| 3434 | /* this is the common, ordinary case */ |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3435 | /* The name can be present, or not */ |
| 3436 | if (!have_szB) { |
| 3437 | /* We must know the size. |
| 3438 | But in Ada, record with discriminants might have no size. |
| 3439 | But in C, VLA in the middle of a struct (gcc extension) |
| 3440 | might have no size. |
| 3441 | Instead, some GNAT dwarf extensions and/or dwarf entries |
| 3442 | allow to calculate the struct size at runtime. |
| 3443 | We cannot do that (yet?) so, the temporary kludge is to use |
| 3444 | a small size. */ |
| 3445 | typeE.Te.TyStOrUn.szB = 1; |
| 3446 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3447 | /* On't stack! */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3448 | typestack_push( cc, parser, td3, &typeE, level ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3449 | goto acquire_Type; |
| 3450 | } |
| 3451 | else { |
| 3452 | /* don't know how to handle any other variants just now */ |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3453 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3454 | } |
| 3455 | } |
| 3456 | |
| 3457 | if (dtag == DW_TAG_member) { |
| 3458 | /* Acquire member entries for both DW_TAG_structure_type and |
| 3459 | DW_TAG_union_type. They differ minorly, in that struct |
| 3460 | members must have a DW_AT_data_member_location expression |
| 3461 | whereas union members must not. */ |
| 3462 | Bool parent_is_struct; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3463 | VG_(memset)( &fieldE, 0, sizeof(fieldE) ); |
| 3464 | fieldE.cuOff = posn; |
| 3465 | fieldE.tag = Te_Field; |
| 3466 | fieldE.Te.Field.typeR = D3_INVALID_CUOFF; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3467 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3468 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3469 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 3470 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 3471 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3472 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3473 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 3474 | if (attr == DW_AT_name && cts.szB < 0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3475 | fieldE.Te.Field.name |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3476 | = ML_(cur_read_strdup)( cts.u.cur, |
| 3477 | "di.readdwarf3.ptD.member.1" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3478 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3479 | if (attr == DW_AT_type && cts.szB > 0) { |
| 3480 | fieldE.Te.Field.typeR |
| 3481 | = cook_die_using_form( cc, (UWord)cts.u.val, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3482 | } |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 3483 | /* There are 2 different cases for DW_AT_data_member_location. |
| 3484 | If it is a constant class attribute, it contains byte offset |
| 3485 | from the beginning of the containing entity. |
| 3486 | Otherwise it is a location expression. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3487 | if (attr == DW_AT_data_member_location && cts.szB > 0) { |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 3488 | fieldE.Te.Field.nLoc = -1; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3489 | fieldE.Te.Field.pos.offset = cts.u.val; |
| 3490 | } |
| 3491 | if (attr == DW_AT_data_member_location && cts.szB <= 0) { |
| 3492 | fieldE.Te.Field.nLoc = (UWord)(-cts.szB); |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 3493 | fieldE.Te.Field.pos.loc |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3494 | = ML_(cur_read_memdup)( cts.u.cur, |
| 3495 | (SizeT)fieldE.Te.Field.nLoc, |
| 3496 | "di.readdwarf3.ptD.member.2" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3497 | } |
| 3498 | } |
| 3499 | /* Do we have a plausible parent? */ |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3500 | if (typestack_is_empty(parser)) goto_bad_DIE; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3501 | vg_assert(ML_(TyEnt__is_type)(&parser->qparentE[parser->sp])); |
| 3502 | vg_assert(parser->qparentE[parser->sp].cuOff != D3_INVALID_CUOFF); |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3503 | if (level != parser->qlevel[parser->sp]+1) goto_bad_DIE; |
| 3504 | if (parser->qparentE[parser->sp].tag != Te_TyStOrUn) goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3505 | /* Do we have something that looks sane? If this a member of a |
| 3506 | struct, we must have a location expression; but if a member |
| 3507 | of a union that is irrelevant (D3 spec sec 5.6.6). We ought |
| 3508 | to reject in the latter case, but some compilers have been |
| 3509 | observed to emit constant-zero expressions. So just ignore |
| 3510 | them. */ |
| 3511 | parent_is_struct |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3512 | = parser->qparentE[parser->sp].Te.TyStOrUn.isStruct; |
| 3513 | if (!fieldE.Te.Field.name) |
| 3514 | fieldE.Te.Field.name |
| 3515 | = ML_(dinfo_strdup)( "di.readdwarf3.ptD.member.3", |
| 3516 | "<anon_field>" ); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3517 | if (fieldE.Te.Field.typeR == D3_INVALID_CUOFF) |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3518 | goto_bad_DIE; |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 3519 | if (fieldE.Te.Field.nLoc) { |
tom | 07de5dd | 2009-08-03 14:39:54 +0000 | [diff] [blame] | 3520 | if (!parent_is_struct) { |
| 3521 | /* If this is a union type, pretend we haven't seen the data |
| 3522 | member location expression, as it is by definition |
| 3523 | redundant (it must be zero). */ |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 3524 | if (fieldE.Te.Field.nLoc > 0) |
| 3525 | ML_(dinfo_free)(fieldE.Te.Field.pos.loc); |
| 3526 | fieldE.Te.Field.pos.loc = NULL; |
tom | 07de5dd | 2009-08-03 14:39:54 +0000 | [diff] [blame] | 3527 | fieldE.Te.Field.nLoc = 0; |
| 3528 | } |
| 3529 | /* Record this child in the parent */ |
| 3530 | fieldE.Te.Field.isStruct = parent_is_struct; |
| 3531 | vg_assert(parser->qparentE[parser->sp].Te.TyStOrUn.fieldRs); |
| 3532 | VG_(addToXA)( parser->qparentE[parser->sp].Te.TyStOrUn.fieldRs, |
| 3533 | &posn ); |
| 3534 | /* And record the child itself */ |
| 3535 | goto acquire_Field; |
| 3536 | } else { |
| 3537 | /* Member with no location - this can happen with static |
| 3538 | const members in C++ code which are compile time constants |
| 3539 | that do no exist in the class. They're not of any interest |
| 3540 | to us so we ignore them. */ |
philippe | d9df0ea | 2012-02-28 20:10:05 +0000 | [diff] [blame] | 3541 | ML_(TyEnt__make_EMPTY)(&fieldE); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3542 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3543 | } |
| 3544 | |
| 3545 | if (dtag == DW_TAG_array_type) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3546 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 3547 | typeE.cuOff = posn; |
| 3548 | typeE.tag = Te_TyArray; |
| 3549 | typeE.Te.TyArray.typeR = D3_INVALID_CUOFF; |
| 3550 | typeE.Te.TyArray.boundRs |
| 3551 | = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.ptD.array_type.1", |
| 3552 | ML_(dinfo_free), |
| 3553 | sizeof(UWord) ); |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3554 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3555 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3556 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 3557 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 3558 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3559 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3560 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 3561 | if (attr == DW_AT_type && cts.szB > 0) { |
| 3562 | typeE.Te.TyArray.typeR |
| 3563 | = cook_die_using_form( cc, (UWord)cts.u.val, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3564 | } |
| 3565 | } |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3566 | if (typeE.Te.TyArray.typeR == D3_INVALID_CUOFF) |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3567 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3568 | /* On't stack! */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3569 | typestack_push( cc, parser, td3, &typeE, level ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3570 | goto acquire_Type; |
| 3571 | } |
| 3572 | |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 3573 | /* this is a subrange type defining the bounds of an array. */ |
| 3574 | if (dtag == DW_TAG_subrange_type |
| 3575 | && subrange_type_denotes_array_bounds(parser, dtag)) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3576 | Bool have_lower = False; |
| 3577 | Bool have_upper = False; |
| 3578 | Bool have_count = False; |
| 3579 | Long lower = 0; |
| 3580 | Long upper = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3581 | |
| 3582 | switch (parser->language) { |
| 3583 | case 'C': have_lower = True; lower = 0; break; |
| 3584 | case 'F': have_lower = True; lower = 1; break; |
| 3585 | case '?': have_lower = False; break; |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 3586 | case 'A': have_lower = False; break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3587 | default: vg_assert(0); /* assured us by handling of |
| 3588 | DW_TAG_compile_unit in this fn */ |
| 3589 | } |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3590 | |
| 3591 | VG_(memset)( &boundE, 0, sizeof(boundE) ); |
| 3592 | boundE.cuOff = D3_INVALID_CUOFF; |
| 3593 | boundE.tag = Te_Bound; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3594 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3595 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3596 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 3597 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 3598 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3599 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3600 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 3601 | if (attr == DW_AT_lower_bound && cts.szB > 0) { |
| 3602 | lower = (Long)cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3603 | have_lower = True; |
| 3604 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3605 | if (attr == DW_AT_upper_bound && cts.szB > 0) { |
| 3606 | upper = (Long)cts.u.val; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3607 | have_upper = True; |
| 3608 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3609 | if (attr == DW_AT_count && cts.szB > 0) { |
| 3610 | /*count = (Long)cts.u.val;*/ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3611 | have_count = True; |
| 3612 | } |
| 3613 | } |
| 3614 | /* FIXME: potentially skip the rest if no parent present, since |
| 3615 | it could be the case that this subrange type is free-standing |
| 3616 | (not being used to describe the bounds of a containing array |
| 3617 | type) */ |
| 3618 | /* Do we have a plausible parent? */ |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3619 | if (typestack_is_empty(parser)) goto_bad_DIE; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3620 | vg_assert(ML_(TyEnt__is_type)(&parser->qparentE[parser->sp])); |
| 3621 | vg_assert(parser->qparentE[parser->sp].cuOff != D3_INVALID_CUOFF); |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3622 | if (level != parser->qlevel[parser->sp]+1) goto_bad_DIE; |
| 3623 | if (parser->qparentE[parser->sp].tag != Te_TyArray) goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3624 | |
| 3625 | /* Figure out if we have a definite range or not */ |
| 3626 | if (have_lower && have_upper && (!have_count)) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3627 | boundE.Te.Bound.knownL = True; |
| 3628 | boundE.Te.Bound.knownU = True; |
| 3629 | boundE.Te.Bound.boundL = lower; |
| 3630 | boundE.Te.Bound.boundU = upper; |
tom | 7225992 | 2009-08-03 08:50:58 +0000 | [diff] [blame] | 3631 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3632 | else if (have_lower && (!have_upper) && (!have_count)) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3633 | boundE.Te.Bound.knownL = True; |
| 3634 | boundE.Te.Bound.knownU = False; |
| 3635 | boundE.Te.Bound.boundL = lower; |
| 3636 | boundE.Te.Bound.boundU = 0; |
tom | 7225992 | 2009-08-03 08:50:58 +0000 | [diff] [blame] | 3637 | } |
| 3638 | else if ((!have_lower) && have_upper && (!have_count)) { |
| 3639 | boundE.Te.Bound.knownL = False; |
| 3640 | boundE.Te.Bound.knownU = True; |
| 3641 | boundE.Te.Bound.boundL = 0; |
| 3642 | boundE.Te.Bound.boundU = upper; |
| 3643 | } |
| 3644 | else if ((!have_lower) && (!have_upper) && (!have_count)) { |
| 3645 | boundE.Te.Bound.knownL = False; |
| 3646 | boundE.Te.Bound.knownU = False; |
| 3647 | boundE.Te.Bound.boundL = 0; |
| 3648 | boundE.Te.Bound.boundU = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3649 | } else { |
| 3650 | /* FIXME: handle more cases */ |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3651 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3652 | } |
| 3653 | |
| 3654 | /* Record this bound in the parent */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3655 | boundE.cuOff = posn; |
| 3656 | vg_assert(parser->qparentE[parser->sp].Te.TyArray.boundRs); |
| 3657 | VG_(addToXA)( parser->qparentE[parser->sp].Te.TyArray.boundRs, |
sewardj | 471d6b3 | 2012-04-05 07:15:22 +0000 | [diff] [blame] | 3658 | &boundE.cuOff ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3659 | /* And record the child itself */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3660 | goto acquire_Bound; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3661 | } |
| 3662 | |
sewardj | 2acc87c | 2011-02-01 23:10:14 +0000 | [diff] [blame] | 3663 | /* typedef or subrange_type other than array bounds. */ |
| 3664 | if (dtag == DW_TAG_typedef |
| 3665 | || (dtag == DW_TAG_subrange_type |
| 3666 | && !subrange_type_denotes_array_bounds(parser, dtag))) { |
| 3667 | /* subrange_type other than array bound is only for Ada. */ |
| 3668 | vg_assert (dtag == DW_TAG_typedef || parser->language == 'A'); |
| 3669 | /* We can pick up a new typedef/subrange_type any time. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3670 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 3671 | typeE.cuOff = D3_INVALID_CUOFF; |
| 3672 | typeE.tag = Te_TyTyDef; |
| 3673 | typeE.Te.TyTyDef.name = NULL; |
| 3674 | typeE.Te.TyTyDef.typeR = D3_INVALID_CUOFF; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3675 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3676 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3677 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 3678 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 3679 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3680 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3681 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 3682 | if (attr == DW_AT_name && cts.szB < 0) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3683 | typeE.Te.TyTyDef.name |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3684 | = ML_(cur_read_strdup)( cts.u.cur, |
| 3685 | "di.readdwarf3.ptD.typedef.1" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3686 | } |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3687 | if (attr == DW_AT_type && cts.szB > 0) { |
| 3688 | typeE.Te.TyTyDef.typeR |
| 3689 | = cook_die_using_form( cc, (UWord)cts.u.val, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3690 | } |
| 3691 | } |
mjw | e5cf451 | 2013-11-24 17:19:35 +0000 | [diff] [blame] | 3692 | /* Do we have something that looks sane? |
| 3693 | gcc gnat Ada generates minimal typedef |
| 3694 | such as the below |
| 3695 | <6><91cc>: DW_TAG_typedef |
| 3696 | DW_AT_abstract_ori: <9066> |
| 3697 | g++ for OMP can generate artificial functions that have |
| 3698 | parameters that refer to pointers to unnamed typedefs. |
| 3699 | See https://bugs.kde.org/show_bug.cgi?id=273475 |
| 3700 | So we cannot require a name for a DW_TAG_typedef. |
| 3701 | */ |
| 3702 | goto acquire_Type; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3703 | } |
| 3704 | |
| 3705 | if (dtag == DW_TAG_subroutine_type) { |
| 3706 | /* function type? just record that one fact and ask no |
| 3707 | further questions. */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3708 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 3709 | typeE.cuOff = D3_INVALID_CUOFF; |
| 3710 | typeE.tag = Te_TyFn; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3711 | goto acquire_Type; |
| 3712 | } |
| 3713 | |
mjw | c81436d | 2014-07-15 15:47:25 +0000 | [diff] [blame] | 3714 | if (dtag == DW_TAG_volatile_type || dtag == DW_TAG_const_type |
| 3715 | || dtag == DW_TAG_restrict_type) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3716 | Int have_ty = 0; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3717 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 3718 | typeE.cuOff = D3_INVALID_CUOFF; |
| 3719 | typeE.tag = Te_TyQual; |
| 3720 | typeE.Te.TyQual.qual |
mjw | c81436d | 2014-07-15 15:47:25 +0000 | [diff] [blame] | 3721 | = (dtag == DW_TAG_volatile_type ? 'V' |
| 3722 | : (dtag == DW_TAG_const_type ? 'C' : 'R')); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3723 | /* target type defaults to 'void' */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3724 | typeE.Te.TyQual.typeR = D3_FAKEVOID_CUOFF; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3725 | nf_i = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3726 | while (True) { |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 3727 | DW_AT attr = (DW_AT) abbv->nf[nf_i].at_name; |
| 3728 | DW_FORM form = (DW_FORM)abbv->nf[nf_i].at_form; |
| 3729 | nf_i++; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3730 | if (attr == 0 && form == 0) break; |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 3731 | get_Form_contents( &cts, cc, c_die, False/*td3*/, form ); |
| 3732 | if (attr == DW_AT_type && cts.szB > 0) { |
| 3733 | typeE.Te.TyQual.typeR |
| 3734 | = cook_die_using_form( cc, (UWord)cts.u.val, form ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3735 | have_ty++; |
| 3736 | } |
| 3737 | } |
| 3738 | /* gcc sometimes generates DW_TAG_const/volatile_type without |
| 3739 | DW_AT_type and GDB appears to interpret the type as 'const |
| 3740 | void' (resp. 'volatile void'). So just allow it .. */ |
| 3741 | if (have_ty == 1 || have_ty == 0) |
| 3742 | goto acquire_Type; |
| 3743 | else |
philippe | 5c5b8fc | 2014-05-06 20:15:55 +0000 | [diff] [blame] | 3744 | goto_bad_DIE; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3745 | } |
| 3746 | |
bart | e64c5a9 | 2012-01-16 17:11:07 +0000 | [diff] [blame] | 3747 | /* |
| 3748 | * Treat DW_TAG_unspecified_type as type void. An example of DW_TAG_unspecified_type: |
| 3749 | * |
| 3750 | * $ readelf --debug-dump /usr/lib/debug/usr/lib/libstdc++.so.6.0.16.debug |
| 3751 | * <1><10d4>: Abbrev Number: 53 (DW_TAG_unspecified_type) |
| 3752 | * <10d5> DW_AT_name : (indirect string, offset: 0xdb7): decltype(nullptr) |
| 3753 | */ |
| 3754 | if (dtag == DW_TAG_unspecified_type) { |
| 3755 | VG_(memset)(&typeE, 0, sizeof(typeE)); |
| 3756 | typeE.cuOff = D3_INVALID_CUOFF; |
| 3757 | typeE.tag = Te_TyQual; |
| 3758 | typeE.Te.TyQual.typeR = D3_FAKEVOID_CUOFF; |
| 3759 | goto acquire_Type; |
| 3760 | } |
| 3761 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3762 | /* else ignore this DIE */ |
| 3763 | return; |
| 3764 | /*NOTREACHED*/ |
| 3765 | |
| 3766 | acquire_Type: |
| 3767 | if (0) VG_(printf)("YYYY Acquire Type\n"); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3768 | vg_assert(ML_(TyEnt__is_type)( &typeE )); |
| 3769 | vg_assert(typeE.cuOff == D3_INVALID_CUOFF || typeE.cuOff == posn); |
| 3770 | typeE.cuOff = posn; |
| 3771 | VG_(addToXA)( tyents, &typeE ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3772 | return; |
| 3773 | /*NOTREACHED*/ |
| 3774 | |
| 3775 | acquire_Atom: |
| 3776 | if (0) VG_(printf)("YYYY Acquire Atom\n"); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3777 | vg_assert(atomE.tag == Te_Atom); |
| 3778 | vg_assert(atomE.cuOff == D3_INVALID_CUOFF || atomE.cuOff == posn); |
| 3779 | atomE.cuOff = posn; |
| 3780 | VG_(addToXA)( tyents, &atomE ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3781 | return; |
| 3782 | /*NOTREACHED*/ |
| 3783 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3784 | acquire_Field: |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3785 | /* For union members, Expr should be absent */ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3786 | if (0) VG_(printf)("YYYY Acquire Field\n"); |
| 3787 | vg_assert(fieldE.tag == Te_Field); |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 3788 | vg_assert(fieldE.Te.Field.nLoc <= 0 || fieldE.Te.Field.pos.loc != NULL); |
| 3789 | vg_assert(fieldE.Te.Field.nLoc != 0 || fieldE.Te.Field.pos.loc == NULL); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3790 | if (fieldE.Te.Field.isStruct) { |
tom | 3c9cf34 | 2009-11-12 13:28:34 +0000 | [diff] [blame] | 3791 | vg_assert(fieldE.Te.Field.nLoc != 0); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3792 | } else { |
| 3793 | vg_assert(fieldE.Te.Field.nLoc == 0); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3794 | } |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3795 | vg_assert(fieldE.cuOff == D3_INVALID_CUOFF || fieldE.cuOff == posn); |
| 3796 | fieldE.cuOff = posn; |
| 3797 | VG_(addToXA)( tyents, &fieldE ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3798 | return; |
| 3799 | /*NOTREACHED*/ |
| 3800 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3801 | acquire_Bound: |
| 3802 | if (0) VG_(printf)("YYYY Acquire Bound\n"); |
| 3803 | vg_assert(boundE.tag == Te_Bound); |
| 3804 | vg_assert(boundE.cuOff == D3_INVALID_CUOFF || boundE.cuOff == posn); |
| 3805 | boundE.cuOff = posn; |
| 3806 | VG_(addToXA)( tyents, &boundE ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3807 | return; |
| 3808 | /*NOTREACHED*/ |
| 3809 | |
| 3810 | bad_DIE: |
philippe | 896a3bf | 2014-06-15 21:49:13 +0000 | [diff] [blame] | 3811 | dump_bad_die_and_barf("parse_type_DIE", dtag, posn, level, |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 3812 | c_die, saved_die_c_offset, |
| 3813 | abbv, |
| 3814 | cc); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 3815 | /*NOTREACHED*/ |
| 3816 | } |
| 3817 | |
| 3818 | |
| 3819 | /*------------------------------------------------------------*/ |
| 3820 | /*--- ---*/ |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3821 | /*--- Compression of type DIE information ---*/ |
| 3822 | /*--- ---*/ |
| 3823 | /*------------------------------------------------------------*/ |
| 3824 | |
| 3825 | static UWord chase_cuOff ( Bool* changed, |
florian | 3297124 | 2014-10-23 17:47:15 +0000 | [diff] [blame] | 3826 | const XArray* /* of TyEnt */ ents, |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3827 | TyEntIndexCache* ents_cache, |
| 3828 | UWord cuOff ) |
| 3829 | { |
| 3830 | TyEnt* ent; |
| 3831 | ent = ML_(TyEnts__index_by_cuOff)( ents, ents_cache, cuOff ); |
| 3832 | |
| 3833 | if (!ent) { |
| 3834 | VG_(printf)("chase_cuOff: no entry for 0x%05lx\n", cuOff); |
| 3835 | *changed = False; |
| 3836 | return cuOff; |
| 3837 | } |
| 3838 | |
| 3839 | vg_assert(ent->tag != Te_EMPTY); |
| 3840 | if (ent->tag != Te_INDIR) { |
| 3841 | *changed = False; |
| 3842 | return cuOff; |
| 3843 | } else { |
| 3844 | vg_assert(ent->Te.INDIR.indR < cuOff); |
| 3845 | *changed = True; |
| 3846 | return ent->Te.INDIR.indR; |
| 3847 | } |
| 3848 | } |
| 3849 | |
| 3850 | static |
| 3851 | void chase_cuOffs_in_XArray ( Bool* changed, |
florian | 3297124 | 2014-10-23 17:47:15 +0000 | [diff] [blame] | 3852 | const XArray* /* of TyEnt */ ents, |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3853 | TyEntIndexCache* ents_cache, |
| 3854 | /*MOD*/XArray* /* of UWord */ cuOffs ) |
| 3855 | { |
| 3856 | Bool b2 = False; |
| 3857 | Word i, n = VG_(sizeXA)( cuOffs ); |
| 3858 | for (i = 0; i < n; i++) { |
| 3859 | Bool b = False; |
| 3860 | UWord* p = VG_(indexXA)( cuOffs, i ); |
| 3861 | *p = chase_cuOff( &b, ents, ents_cache, *p ); |
| 3862 | if (b) |
| 3863 | b2 = True; |
| 3864 | } |
| 3865 | *changed = b2; |
| 3866 | } |
| 3867 | |
florian | 3297124 | 2014-10-23 17:47:15 +0000 | [diff] [blame] | 3868 | static Bool TyEnt__subst_R_fields ( const XArray* /* of TyEnt */ ents, |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3869 | TyEntIndexCache* ents_cache, |
| 3870 | /*MOD*/TyEnt* te ) |
| 3871 | { |
| 3872 | Bool b, changed = False; |
| 3873 | switch (te->tag) { |
| 3874 | case Te_EMPTY: |
| 3875 | break; |
| 3876 | case Te_INDIR: |
| 3877 | te->Te.INDIR.indR |
| 3878 | = chase_cuOff( &b, ents, ents_cache, te->Te.INDIR.indR ); |
| 3879 | if (b) changed = True; |
| 3880 | break; |
| 3881 | case Te_UNKNOWN: |
| 3882 | break; |
| 3883 | case Te_Atom: |
| 3884 | break; |
| 3885 | case Te_Field: |
| 3886 | te->Te.Field.typeR |
| 3887 | = chase_cuOff( &b, ents, ents_cache, te->Te.Field.typeR ); |
| 3888 | if (b) changed = True; |
| 3889 | break; |
| 3890 | case Te_Bound: |
| 3891 | break; |
| 3892 | case Te_TyBase: |
| 3893 | break; |
bart | 0e947cf | 2012-02-01 14:59:14 +0000 | [diff] [blame] | 3894 | case Te_TyPtr: |
| 3895 | case Te_TyRef: |
| 3896 | case Te_TyPtrMbr: |
| 3897 | case Te_TyRvalRef: |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 3898 | te->Te.TyPorR.typeR |
| 3899 | = chase_cuOff( &b, ents, ents_cache, te->Te.TyPorR.typeR ); |
| 3900 | if (b) changed = True; |
| 3901 | break; |
| 3902 | case Te_TyTyDef: |
| 3903 | te->Te.TyTyDef.typeR |
| 3904 | = chase_cuOff( &b, ents, ents_cache, te->Te.TyTyDef.typeR ); |
| 3905 | if (b) changed = True; |
| 3906 | break; |
| 3907 | case Te_TyStOrUn: |
| 3908 | chase_cuOffs_in_XArray( &b, ents, ents_cache, te->Te.TyStOrUn.fieldRs ); |
| 3909 | if (b) changed = True; |
| 3910 | break; |
| 3911 | case Te_TyEnum: |
| 3912 | chase_cuOffs_in_XArray( &b, ents, ents_cache, te->Te.TyEnum.atomRs ); |
| 3913 | if (b) changed = True; |
| 3914 | break; |
| 3915 | case Te_TyArray: |
| 3916 | te->Te.TyArray.typeR |
| 3917 | = chase_cuOff( &b, ents, ents_cache, te->Te.TyArray.typeR ); |
| 3918 | if (b) changed = True; |
| 3919 | chase_cuOffs_in_XArray( &b, ents, ents_cache, te->Te.TyArray.boundRs ); |
| 3920 | if (b) changed = True; |
| 3921 | break; |
| 3922 | case Te_TyFn: |
| 3923 | break; |
| 3924 | case Te_TyQual: |
| 3925 | te->Te.TyQual.typeR |
| 3926 | = chase_cuOff( &b, ents, ents_cache, te->Te.TyQual.typeR ); |
| 3927 | if (b) changed = True; |
| 3928 | break; |
| 3929 | case Te_TyVoid: |
| 3930 | break; |
| 3931 | default: |
| 3932 | ML_(pp_TyEnt)(te); |
| 3933 | vg_assert(0); |
| 3934 | } |
| 3935 | return changed; |
| 3936 | } |
| 3937 | |
| 3938 | /* Make a pass over 'ents'. For each tyent, inspect the target of any |
| 3939 | 'R' or 'Rs' fields (those which refer to other tyents), and replace |
| 3940 | any which point to INDIR nodes with the target of the indirection |
| 3941 | (which should not itself be an indirection). In summary, this |
| 3942 | routine shorts out all references to indirection nodes. */ |
| 3943 | static |
| 3944 | Word dedup_types_substitution_pass ( /*MOD*/XArray* /* of TyEnt */ ents, |
| 3945 | TyEntIndexCache* ents_cache ) |
| 3946 | { |
| 3947 | Word i, n, nChanged = 0; |
| 3948 | Bool b; |
| 3949 | n = VG_(sizeXA)( ents ); |
| 3950 | for (i = 0; i < n; i++) { |
| 3951 | TyEnt* ent = VG_(indexXA)( ents, i ); |
| 3952 | vg_assert(ent->tag != Te_EMPTY); |
| 3953 | /* We have to substitute everything, even indirections, so as to |
| 3954 | ensure that chains of indirections don't build up. */ |
| 3955 | b = TyEnt__subst_R_fields( ents, ents_cache, ent ); |
| 3956 | if (b) |
| 3957 | nChanged++; |
| 3958 | } |
| 3959 | |
| 3960 | return nChanged; |
| 3961 | } |
| 3962 | |
| 3963 | |
| 3964 | /* Make a pass over 'ents', building a dictionary of TyEnts as we go. |
| 3965 | Look up each new tyent in the dictionary in turn. If it is already |
| 3966 | in the dictionary, replace this tyent with an indirection to the |
| 3967 | existing one, and delete any malloc'd stuff hanging off this one. |
| 3968 | In summary, this routine commons up all tyents that are identical |
| 3969 | as defined by TyEnt__cmp_by_all_except_cuOff. */ |
| 3970 | static |
| 3971 | Word dedup_types_commoning_pass ( /*MOD*/XArray* /* of TyEnt */ ents ) |
| 3972 | { |
| 3973 | Word n, i, nDeleted; |
| 3974 | WordFM* dict; /* TyEnt* -> void */ |
| 3975 | TyEnt* ent; |
| 3976 | UWord keyW, valW; |
| 3977 | |
| 3978 | dict = VG_(newFM)( |
| 3979 | ML_(dinfo_zalloc), "di.readdwarf3.dtcp.1", |
| 3980 | ML_(dinfo_free), |
| 3981 | (Word(*)(UWord,UWord)) ML_(TyEnt__cmp_by_all_except_cuOff) |
| 3982 | ); |
| 3983 | |
| 3984 | nDeleted = 0; |
| 3985 | n = VG_(sizeXA)( ents ); |
| 3986 | for (i = 0; i < n; i++) { |
| 3987 | ent = VG_(indexXA)( ents, i ); |
| 3988 | vg_assert(ent->tag != Te_EMPTY); |
| 3989 | |
| 3990 | /* Ignore indirections, although check that they are |
| 3991 | not forming a cycle. */ |
| 3992 | if (ent->tag == Te_INDIR) { |
| 3993 | vg_assert(ent->Te.INDIR.indR < ent->cuOff); |
| 3994 | continue; |
| 3995 | } |
| 3996 | |
| 3997 | keyW = valW = 0; |
| 3998 | if (VG_(lookupFM)( dict, &keyW, &valW, (UWord)ent )) { |
| 3999 | /* it's already in the dictionary. */ |
| 4000 | TyEnt* old = (TyEnt*)keyW; |
| 4001 | vg_assert(valW == 0); |
| 4002 | vg_assert(old != ent); |
| 4003 | vg_assert(old->tag != Te_INDIR); |
| 4004 | /* since we are traversing the array in increasing order of |
| 4005 | cuOff: */ |
| 4006 | vg_assert(old->cuOff < ent->cuOff); |
| 4007 | /* So anyway, dump this entry and replace it with an |
| 4008 | indirection to the one in the dictionary. Note that the |
| 4009 | assertion above guarantees that we cannot create cycles of |
| 4010 | indirections, since we are always creating an indirection |
| 4011 | to a tyent with a cuOff lower than this one. */ |
| 4012 | ML_(TyEnt__make_EMPTY)( ent ); |
| 4013 | ent->tag = Te_INDIR; |
| 4014 | ent->Te.INDIR.indR = old->cuOff; |
| 4015 | nDeleted++; |
| 4016 | } else { |
| 4017 | /* not in dictionary; add it and keep going. */ |
| 4018 | VG_(addToFM)( dict, (UWord)ent, 0 ); |
| 4019 | } |
| 4020 | } |
| 4021 | |
| 4022 | VG_(deleteFM)( dict, NULL, NULL ); |
| 4023 | |
| 4024 | return nDeleted; |
| 4025 | } |
| 4026 | |
| 4027 | |
| 4028 | static |
| 4029 | void dedup_types ( Bool td3, |
| 4030 | /*MOD*/XArray* /* of TyEnt */ ents, |
| 4031 | TyEntIndexCache* ents_cache ) |
| 4032 | { |
| 4033 | Word m, n, i, nDel, nSubst, nThresh; |
| 4034 | if (0) td3 = True; |
| 4035 | |
| 4036 | n = VG_(sizeXA)( ents ); |
| 4037 | |
| 4038 | /* If a commoning pass and a substitution pass both make fewer than |
| 4039 | this many changes, just stop. It's pointless to burn up CPU |
| 4040 | time trying to compress the last 1% or so out of the array. */ |
| 4041 | nThresh = n / 200; |
| 4042 | |
| 4043 | /* First we must sort .ents by its .cuOff fields, so we |
| 4044 | can index into it. */ |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 4045 | VG_(setCmpFnXA)( ents, (XACmpFn_t) ML_(TyEnt__cmp_by_cuOff_only) ); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4046 | VG_(sortXA)( ents ); |
| 4047 | |
| 4048 | /* Now repeatedly do commoning and substitution passes over |
| 4049 | the array, until there are no more changes. */ |
| 4050 | do { |
| 4051 | nDel = dedup_types_commoning_pass ( ents ); |
| 4052 | nSubst = dedup_types_substitution_pass ( ents, ents_cache ); |
| 4053 | vg_assert(nDel >= 0 && nSubst >= 0); |
| 4054 | TRACE_D3(" %ld deletions, %ld substitutions\n", nDel, nSubst); |
| 4055 | } while (nDel > nThresh || nSubst > nThresh); |
| 4056 | |
| 4057 | /* Sanity check: all INDIR nodes should point at a non-INDIR thing. |
| 4058 | In fact this should be true at the end of every loop iteration |
| 4059 | above (a commoning pass followed by a substitution pass), but |
| 4060 | checking it on every iteration is excessively expensive. Note, |
| 4061 | this loop also computes 'm' for the stats printing below it. */ |
| 4062 | m = 0; |
| 4063 | n = VG_(sizeXA)( ents ); |
| 4064 | for (i = 0; i < n; i++) { |
| 4065 | TyEnt *ent, *ind; |
| 4066 | ent = VG_(indexXA)( ents, i ); |
| 4067 | if (ent->tag != Te_INDIR) continue; |
| 4068 | m++; |
| 4069 | ind = ML_(TyEnts__index_by_cuOff)( ents, ents_cache, |
| 4070 | ent->Te.INDIR.indR ); |
| 4071 | vg_assert(ind); |
| 4072 | vg_assert(ind->tag != Te_INDIR); |
| 4073 | } |
| 4074 | |
| 4075 | TRACE_D3("Overall: %ld before, %ld after\n", n, n-m); |
| 4076 | } |
| 4077 | |
| 4078 | |
| 4079 | /*------------------------------------------------------------*/ |
| 4080 | /*--- ---*/ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4081 | /*--- Resolution of references to type DIEs ---*/ |
| 4082 | /*--- ---*/ |
| 4083 | /*------------------------------------------------------------*/ |
| 4084 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4085 | /* Make a pass through the (temporary) variables array. Examine the |
| 4086 | type of each variable, check is it found, and chase any Te_INDIRs. |
| 4087 | Postcondition is: each variable has a typeR field that refers to a |
| 4088 | valid type in tyents, or a Te_UNKNOWN, and is certainly guaranteed |
| 4089 | not to refer to a Te_INDIR. (This is so that we can throw all the |
| 4090 | Te_INDIRs away later). */ |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4091 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4092 | __attribute__((noinline)) |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4093 | static void resolve_variable_types ( |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 4094 | void (*barf)( const HChar* ) __attribute__((noreturn)), |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4095 | /*R-O*/XArray* /* of TyEnt */ ents, |
| 4096 | /*MOD*/TyEntIndexCache* ents_cache, |
| 4097 | /*MOD*/XArray* /* of TempVar* */ vars |
| 4098 | ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4099 | { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4100 | Word i, n; |
sewardj | 59a2d18 | 2008-08-22 23:18:02 +0000 | [diff] [blame] | 4101 | n = VG_(sizeXA)( vars ); |
| 4102 | for (i = 0; i < n; i++) { |
| 4103 | TempVar* var = *(TempVar**)VG_(indexXA)( vars, i ); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4104 | /* This is the stated type of the variable. But it might be |
| 4105 | an indirection, so be careful. */ |
| 4106 | TyEnt* ent = ML_(TyEnts__index_by_cuOff)( ents, ents_cache, |
| 4107 | var->typeR ); |
| 4108 | if (ent && ent->tag == Te_INDIR) { |
| 4109 | ent = ML_(TyEnts__index_by_cuOff)( ents, ents_cache, |
| 4110 | ent->Te.INDIR.indR ); |
| 4111 | vg_assert(ent); |
| 4112 | vg_assert(ent->tag != Te_INDIR); |
| 4113 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4114 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4115 | /* Deal first with "normal" cases */ |
| 4116 | if (ent && ML_(TyEnt__is_type)(ent)) { |
| 4117 | var->typeR = ent->cuOff; |
| 4118 | continue; |
| 4119 | } |
| 4120 | |
| 4121 | /* If there's no ent, it probably we did not manage to read a |
| 4122 | type at the cuOffset which is stated as being this variable's |
| 4123 | type. Maybe a deficiency in parse_type_DIE. Complain. */ |
| 4124 | if (ent == NULL) { |
| 4125 | VG_(printf)("\n: Invalid cuOff = 0x%05lx\n", var->typeR ); |
| 4126 | barf("resolve_variable_types: " |
| 4127 | "cuOff does not refer to a known type"); |
| 4128 | } |
| 4129 | vg_assert(ent); |
| 4130 | /* If ent has any other tag, something bad happened, along the |
| 4131 | lines of var->typeR not referring to a type at all. */ |
| 4132 | vg_assert(ent->tag == Te_UNKNOWN); |
| 4133 | /* Just accept it; the type will be useless, but at least keep |
| 4134 | going. */ |
| 4135 | var->typeR = ent->cuOff; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4136 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4137 | } |
| 4138 | |
| 4139 | |
| 4140 | /*------------------------------------------------------------*/ |
| 4141 | /*--- ---*/ |
| 4142 | /*--- Parsing of Compilation Units ---*/ |
| 4143 | /*--- ---*/ |
| 4144 | /*------------------------------------------------------------*/ |
| 4145 | |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 4146 | static Int cmp_TempVar_by_dioff ( const void* v1, const void* v2 ) { |
florian | 3e79863 | 2012-11-24 19:41:54 +0000 | [diff] [blame] | 4147 | const TempVar* t1 = *(const TempVar *const *)v1; |
| 4148 | const TempVar* t2 = *(const TempVar *const *)v2; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4149 | if (t1->dioff < t2->dioff) return -1; |
| 4150 | if (t1->dioff > t2->dioff) return 1; |
| 4151 | return 0; |
| 4152 | } |
| 4153 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4154 | static void read_DIE ( |
| 4155 | /*MOD*/WordFM* /* of (XArray* of AddrRange, void) */ rangestree, |
| 4156 | /*MOD*/XArray* /* of TyEnt */ tyents, |
| 4157 | /*MOD*/XArray* /* of TempVar* */ tempvars, |
| 4158 | /*MOD*/XArray* /* of GExpr* */ gexprs, |
| 4159 | /*MOD*/D3TypeParser* typarser, |
| 4160 | /*MOD*/D3VarParser* varparser, |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4161 | /*MOD*/D3InlParser* inlparser, |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4162 | Cursor* c, Bool td3, CUConst* cc, Int level |
| 4163 | ) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4164 | { |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 4165 | const g_abbv *abbv; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4166 | ULong atag, abbv_code; |
| 4167 | UWord posn; |
| 4168 | UInt has_children; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 4169 | UWord start_die_c_offset; |
| 4170 | UWord after_die_c_offset; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4171 | // If the DIE we will parse has a sibling and the parser(s) are |
| 4172 | // all indicating that parse_children is not necessary, then |
| 4173 | // we will skip the children by jumping to the sibling of this DIE |
| 4174 | // (if it has a sibling). |
| 4175 | UWord sibling = 0; |
| 4176 | Bool parse_children = False; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4177 | |
| 4178 | /* --- Deal with this DIE --- */ |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4179 | posn = cook_die( cc, get_position_of_Cursor( c ) ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4180 | abbv_code = get_ULEB128( c ); |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 4181 | abbv = get_abbv(cc, abbv_code); |
| 4182 | atag = abbv->atag; |
philippe | 86be6ed | 2014-06-17 20:21:26 +0000 | [diff] [blame] | 4183 | |
philippe | e0bd591 | 2014-06-21 09:48:17 +0000 | [diff] [blame] | 4184 | if (TD3) { |
philippe | 86be6ed | 2014-06-17 20:21:26 +0000 | [diff] [blame] | 4185 | TRACE_D3("\n"); |
| 4186 | trace_DIE ((DW_TAG)atag, posn, level, |
| 4187 | get_position_of_Cursor( c ), abbv, cc); |
| 4188 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4189 | |
| 4190 | if (atag == 0) |
| 4191 | cc->barf("read_DIE: invalid zero tag on DIE"); |
| 4192 | |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 4193 | has_children = abbv->has_children; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4194 | if (has_children != DW_children_no && has_children != DW_children_yes) |
| 4195 | cc->barf("read_DIE: invalid has_children value"); |
| 4196 | |
| 4197 | /* We're set up to look at the fields of this DIE. Hand it off to |
| 4198 | any parser(s) that want to see it. Since they will in general |
philippe | 0d2ea9d | 2014-06-15 18:28:31 +0000 | [diff] [blame] | 4199 | advance the DIE cursor, remember the current settings so that we |
philippe | d16fb63 | 2014-06-16 21:49:42 +0000 | [diff] [blame] | 4200 | can then back up. . */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4201 | start_die_c_offset = get_position_of_Cursor( c ); |
philippe | d16fb63 | 2014-06-16 21:49:42 +0000 | [diff] [blame] | 4202 | after_die_c_offset = 0; // set to c position if a parser has read the DIE. |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4203 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4204 | if (VG_(clo_read_var_info)) { |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4205 | parse_type_DIE( tyents, |
| 4206 | typarser, |
| 4207 | (DW_TAG)atag, |
| 4208 | posn, |
| 4209 | level, |
| 4210 | c, /* DIE cursor */ |
| 4211 | abbv, /* abbrev */ |
| 4212 | cc, |
| 4213 | td3 ); |
philippe | d16fb63 | 2014-06-16 21:49:42 +0000 | [diff] [blame] | 4214 | if (get_position_of_Cursor( c ) != start_die_c_offset) { |
| 4215 | after_die_c_offset = get_position_of_Cursor( c ); |
| 4216 | set_position_of_Cursor( c, start_die_c_offset ); |
| 4217 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4218 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4219 | parse_var_DIE( rangestree, |
| 4220 | tempvars, |
| 4221 | gexprs, |
| 4222 | varparser, |
| 4223 | (DW_TAG)atag, |
| 4224 | posn, |
| 4225 | level, |
| 4226 | c, /* DIE cursor */ |
| 4227 | abbv, /* abbrev */ |
| 4228 | cc, |
| 4229 | td3 ); |
philippe | d16fb63 | 2014-06-16 21:49:42 +0000 | [diff] [blame] | 4230 | if (get_position_of_Cursor( c ) != start_die_c_offset) { |
| 4231 | after_die_c_offset = get_position_of_Cursor( c ); |
| 4232 | set_position_of_Cursor( c, start_die_c_offset ); |
| 4233 | } |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4234 | |
| 4235 | parse_children = True; |
philippe | d16fb63 | 2014-06-16 21:49:42 +0000 | [diff] [blame] | 4236 | // type and var parsers do not have logic to skip childrens and establish |
| 4237 | // the value of sibling. |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4238 | } |
| 4239 | |
| 4240 | if (VG_(clo_read_inline_info)) { |
philippe | d16fb63 | 2014-06-16 21:49:42 +0000 | [diff] [blame] | 4241 | inlparser->sibling = 0; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4242 | parse_children = |
| 4243 | parse_inl_DIE( inlparser, |
| 4244 | (DW_TAG)atag, |
| 4245 | posn, |
| 4246 | level, |
| 4247 | c, /* DIE cursor */ |
| 4248 | abbv, /* abbrev */ |
| 4249 | cc, |
| 4250 | td3 ) |
| 4251 | || parse_children; |
philippe | d16fb63 | 2014-06-16 21:49:42 +0000 | [diff] [blame] | 4252 | if (get_position_of_Cursor( c ) != start_die_c_offset) { |
| 4253 | after_die_c_offset = get_position_of_Cursor( c ); |
| 4254 | // Last parser, no need to reset the cursor to start_die_c_offset. |
| 4255 | } |
| 4256 | if (sibling == 0) |
| 4257 | sibling = inlparser->sibling; |
| 4258 | vg_assert (inlparser->sibling == 0 || inlparser->sibling == sibling); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4259 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4260 | |
philippe | d16fb63 | 2014-06-16 21:49:42 +0000 | [diff] [blame] | 4261 | if (after_die_c_offset > 0) { |
| 4262 | // DIE was read by a parser above, so we know where the DIE ends. |
| 4263 | set_position_of_Cursor( c, after_die_c_offset ); |
| 4264 | } else { |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 4265 | /* No parser has parsed this DIE. So, we need to skip the DIE, |
| 4266 | in order to read the next DIE. |
philippe | d16fb63 | 2014-06-16 21:49:42 +0000 | [diff] [blame] | 4267 | At the same time, establish sibling value if the DIE has one. */ |
philippe | e1f94b8 | 2014-06-21 10:57:33 +0000 | [diff] [blame] | 4268 | TRACE_D3(" uninteresting DIE -> skipping ...\n"); |
| 4269 | skip_DIE (&sibling, c, abbv, cc); |
philippe | d16fb63 | 2014-06-16 21:49:42 +0000 | [diff] [blame] | 4270 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4271 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4272 | /* --- Now recurse into its children, if any |
| 4273 | and the parsing of the children is requested by a parser --- */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4274 | if (has_children == DW_children_yes) { |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4275 | if (parse_children || sibling == 0) { |
| 4276 | if (0) TRACE_D3("BEGIN children of level %d\n", level); |
| 4277 | while (True) { |
| 4278 | atag = peek_ULEB128( c ); |
| 4279 | if (atag == 0) break; |
| 4280 | read_DIE( rangestree, tyents, tempvars, gexprs, |
| 4281 | typarser, varparser, inlparser, |
| 4282 | c, td3, cc, level+1 ); |
| 4283 | } |
| 4284 | /* Now we need to eat the terminating zero */ |
| 4285 | atag = get_ULEB128( c ); |
| 4286 | vg_assert(atag == 0); |
| 4287 | if (0) TRACE_D3("END children of level %d\n", level); |
| 4288 | } else { |
| 4289 | // We can skip the childrens, by jumping to the sibling |
philippe | 86be6ed | 2014-06-17 20:21:26 +0000 | [diff] [blame] | 4290 | TRACE_D3(" SKIPPING DIE's children," |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4291 | "jumping to sibling <%d><%lx>\n", |
| 4292 | level, sibling); |
| 4293 | set_position_of_Cursor( c, sibling ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4294 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4295 | } |
| 4296 | |
| 4297 | } |
| 4298 | |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 4299 | static void trace_debug_loc (const DebugInfo* di, |
philippe | c983157 | 2014-06-15 18:06:20 +0000 | [diff] [blame] | 4300 | __attribute__((noreturn)) void (*barf)( const HChar* ), |
| 4301 | DiSlice escn_debug_loc) |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4302 | { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4303 | #if 0 |
| 4304 | /* This doesn't work properly because it assumes all entries are |
| 4305 | packed end to end, with no holes. But that doesn't always |
| 4306 | appear to be the case, so it loses sync. And the D3 spec |
| 4307 | doesn't appear to require a no-hole situation either. */ |
| 4308 | /* Display .debug_loc */ |
| 4309 | Addr dl_base; |
| 4310 | UWord dl_offset; |
| 4311 | Cursor loc; /* for showing .debug_loc */ |
philippe | c983157 | 2014-06-15 18:06:20 +0000 | [diff] [blame] | 4312 | Bool td3 = di->trace_symtab; |
| 4313 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4314 | TRACE_SYMTAB("\n"); |
| 4315 | TRACE_SYMTAB("\n------ The contents of .debug_loc ------\n"); |
| 4316 | TRACE_SYMTAB(" Offset Begin End Expression\n"); |
philippe | c983157 | 2014-06-15 18:06:20 +0000 | [diff] [blame] | 4317 | if (ML_(sli_is_valid)(escn_debug_loc)) { |
| 4318 | init_Cursor( &loc, escn_debug_loc, 0, barf, |
| 4319 | "Overrun whilst reading .debug_loc section(1)" ); |
| 4320 | dl_base = 0; |
| 4321 | dl_offset = 0; |
| 4322 | while (True) { |
| 4323 | UWord w1, w2; |
| 4324 | UWord len; |
| 4325 | if (is_at_end_Cursor( &loc )) |
| 4326 | break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4327 | |
philippe | c983157 | 2014-06-15 18:06:20 +0000 | [diff] [blame] | 4328 | /* Read a (host-)word pair. This is something of a hack since |
| 4329 | the word size to read is really dictated by the ELF file; |
| 4330 | however, we assume we're reading a file with the same |
| 4331 | word-sizeness as the host. Reasonably enough. */ |
| 4332 | w1 = get_UWord( &loc ); |
| 4333 | w2 = get_UWord( &loc ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4334 | |
philippe | c983157 | 2014-06-15 18:06:20 +0000 | [diff] [blame] | 4335 | if (w1 == 0 && w2 == 0) { |
| 4336 | /* end of list. reset 'base' */ |
| 4337 | TRACE_D3(" %08lx <End of list>\n", dl_offset); |
| 4338 | dl_base = 0; |
| 4339 | dl_offset = get_position_of_Cursor( &loc ); |
| 4340 | continue; |
| 4341 | } |
| 4342 | |
| 4343 | if (w1 == -1UL) { |
| 4344 | /* new value for 'base' */ |
| 4345 | TRACE_D3(" %08lx %16lx %08lx (base address)\n", |
| 4346 | dl_offset, w1, w2); |
| 4347 | dl_base = w2; |
| 4348 | continue; |
| 4349 | } |
| 4350 | |
| 4351 | /* else a location expression follows */ |
| 4352 | TRACE_D3(" %08lx %08lx %08lx ", |
| 4353 | dl_offset, w1 + dl_base, w2 + dl_base); |
| 4354 | len = (UWord)get_UShort( &loc ); |
| 4355 | while (len > 0) { |
| 4356 | UChar byte = get_UChar( &loc ); |
| 4357 | TRACE_D3("%02x", (UInt)byte); |
| 4358 | len--; |
| 4359 | } |
| 4360 | TRACE_SYMTAB("\n"); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4361 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4362 | } |
| 4363 | #endif |
philippe | c983157 | 2014-06-15 18:06:20 +0000 | [diff] [blame] | 4364 | } |
| 4365 | |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 4366 | static void trace_debug_ranges (const DebugInfo* di, |
philippe | c983157 | 2014-06-15 18:06:20 +0000 | [diff] [blame] | 4367 | __attribute__((noreturn)) void (*barf)( const HChar* ), |
| 4368 | DiSlice escn_debug_ranges) |
| 4369 | { |
| 4370 | Cursor ranges; /* for showing .debug_ranges */ |
| 4371 | Addr dr_base; |
| 4372 | UWord dr_offset; |
| 4373 | Bool td3 = di->trace_symtab; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4374 | |
| 4375 | /* Display .debug_ranges */ |
| 4376 | TRACE_SYMTAB("\n"); |
| 4377 | TRACE_SYMTAB("\n------ The contents of .debug_ranges ------\n"); |
| 4378 | TRACE_SYMTAB(" Offset Begin End\n"); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4379 | if (ML_(sli_is_valid)(escn_debug_ranges)) { |
| 4380 | init_Cursor( &ranges, escn_debug_ranges, 0, barf, |
| 4381 | "Overrun whilst reading .debug_ranges section(1)" ); |
| 4382 | dr_base = 0; |
| 4383 | dr_offset = 0; |
| 4384 | while (True) { |
| 4385 | UWord w1, w2; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4386 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4387 | if (is_at_end_Cursor( &ranges )) |
| 4388 | break; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4389 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4390 | /* Read a (host-)word pair. This is something of a hack since |
| 4391 | the word size to read is really dictated by the ELF file; |
| 4392 | however, we assume we're reading a file with the same |
| 4393 | word-sizeness as the host. Reasonably enough. */ |
| 4394 | w1 = get_UWord( &ranges ); |
| 4395 | w2 = get_UWord( &ranges ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4396 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4397 | if (w1 == 0 && w2 == 0) { |
| 4398 | /* end of list. reset 'base' */ |
| 4399 | TRACE_D3(" %08lx <End of list>\n", dr_offset); |
| 4400 | dr_base = 0; |
| 4401 | dr_offset = get_position_of_Cursor( &ranges ); |
| 4402 | continue; |
| 4403 | } |
| 4404 | |
| 4405 | if (w1 == -1UL) { |
| 4406 | /* new value for 'base' */ |
| 4407 | TRACE_D3(" %08lx %16lx %08lx (base address)\n", |
| 4408 | dr_offset, w1, w2); |
| 4409 | dr_base = w2; |
| 4410 | continue; |
| 4411 | } |
| 4412 | |
| 4413 | /* else a range [w1+base, w2+base) is denoted */ |
| 4414 | TRACE_D3(" %08lx %08lx %08lx\n", |
| 4415 | dr_offset, w1 + dr_base, w2 + dr_base); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4416 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4417 | } |
philippe | c983157 | 2014-06-15 18:06:20 +0000 | [diff] [blame] | 4418 | } |
| 4419 | |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 4420 | static void trace_debug_abbrev (const DebugInfo* di, |
philippe | c983157 | 2014-06-15 18:06:20 +0000 | [diff] [blame] | 4421 | __attribute__((noreturn)) void (*barf)( const HChar* ), |
| 4422 | DiSlice escn_debug_abbv) |
| 4423 | { |
| 4424 | Cursor abbv; /* for showing .debug_abbrev */ |
| 4425 | Bool td3 = di->trace_symtab; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4426 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4427 | /* Display .debug_abbrev */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4428 | TRACE_SYMTAB("\n"); |
| 4429 | TRACE_SYMTAB("\n------ The contents of .debug_abbrev ------\n"); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4430 | if (ML_(sli_is_valid)(escn_debug_abbv)) { |
| 4431 | init_Cursor( &abbv, escn_debug_abbv, 0, barf, |
| 4432 | "Overrun whilst reading .debug_abbrev section" ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4433 | while (True) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4434 | if (is_at_end_Cursor( &abbv )) |
| 4435 | break; |
| 4436 | /* Read one abbreviation table */ |
| 4437 | TRACE_D3(" Number TAG\n"); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4438 | while (True) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4439 | ULong atag; |
| 4440 | UInt has_children; |
| 4441 | ULong acode = get_ULEB128( &abbv ); |
| 4442 | if (acode == 0) break; /* end of the table */ |
| 4443 | atag = get_ULEB128( &abbv ); |
| 4444 | has_children = get_UChar( &abbv ); |
| 4445 | TRACE_D3(" %llu %s [%s]\n", |
| 4446 | acode, ML_(pp_DW_TAG)(atag), |
| 4447 | ML_(pp_DW_children)(has_children)); |
| 4448 | while (True) { |
| 4449 | ULong at_name = get_ULEB128( &abbv ); |
| 4450 | ULong at_form = get_ULEB128( &abbv ); |
| 4451 | if (at_name == 0 && at_form == 0) break; |
florian | 866862a | 2014-12-13 18:35:00 +0000 | [diff] [blame] | 4452 | TRACE_D3(" %-18s %s\n", |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4453 | ML_(pp_DW_AT)(at_name), ML_(pp_DW_FORM)(at_form)); |
| 4454 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4455 | } |
| 4456 | } |
| 4457 | } |
philippe | c983157 | 2014-06-15 18:06:20 +0000 | [diff] [blame] | 4458 | } |
| 4459 | |
| 4460 | static |
| 4461 | void new_dwarf3_reader_wrk ( |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 4462 | DebugInfo* di, |
philippe | c983157 | 2014-06-15 18:06:20 +0000 | [diff] [blame] | 4463 | __attribute__((noreturn)) void (*barf)( const HChar* ), |
| 4464 | DiSlice escn_debug_info, DiSlice escn_debug_types, |
| 4465 | DiSlice escn_debug_abbv, DiSlice escn_debug_line, |
| 4466 | DiSlice escn_debug_str, DiSlice escn_debug_ranges, |
| 4467 | DiSlice escn_debug_loc, DiSlice escn_debug_info_alt, |
| 4468 | DiSlice escn_debug_abbv_alt, DiSlice escn_debug_line_alt, |
| 4469 | DiSlice escn_debug_str_alt |
| 4470 | ) |
| 4471 | { |
| 4472 | XArray* /* of TyEnt */ tyents = NULL; |
| 4473 | XArray* /* of TyEnt */ tyents_to_keep = NULL; |
| 4474 | XArray* /* of GExpr* */ gexprs = NULL; |
| 4475 | XArray* /* of TempVar* */ tempvars = NULL; |
| 4476 | WordFM* /* of (XArray* of AddrRange, void) */ rangestree = NULL; |
| 4477 | TyEntIndexCache* tyents_cache = NULL; |
| 4478 | TyEntIndexCache* tyents_to_keep_cache = NULL; |
| 4479 | TempVar *varp, *varp2; |
| 4480 | GExpr* gexpr; |
| 4481 | Cursor info; /* primary cursor for parsing .debug_info */ |
| 4482 | D3TypeParser typarser; |
| 4483 | D3VarParser varparser; |
| 4484 | D3InlParser inlparser; |
| 4485 | Word i, j, n; |
| 4486 | Bool td3 = di->trace_symtab; |
| 4487 | XArray* /* of TempVar* */ dioff_lookup_tab; |
| 4488 | Int pass; |
florian | 09a4c79 | 2014-10-18 10:58:05 +0000 | [diff] [blame] | 4489 | VgHashTable *signature_types = NULL; |
philippe | c983157 | 2014-06-15 18:06:20 +0000 | [diff] [blame] | 4490 | |
| 4491 | /* Display/trace various information, if requested. */ |
philippe | e0bd591 | 2014-06-21 09:48:17 +0000 | [diff] [blame] | 4492 | if (TD3) { |
philippe | c983157 | 2014-06-15 18:06:20 +0000 | [diff] [blame] | 4493 | trace_debug_loc (di, barf, escn_debug_loc); |
| 4494 | trace_debug_ranges (di, barf, escn_debug_ranges); |
| 4495 | trace_debug_abbrev (di, barf, escn_debug_abbv); |
| 4496 | TRACE_SYMTAB("\n"); |
| 4497 | } |
| 4498 | |
philippe | 5612d1a | 2014-06-16 18:08:02 +0000 | [diff] [blame] | 4499 | /* Zero out all parsers. Parsers will really be initialised |
| 4500 | according to VG_(clo_read_*_info). */ |
philippe | 5612d1a | 2014-06-16 18:08:02 +0000 | [diff] [blame] | 4501 | VG_(memset)( &inlparser, 0, sizeof(inlparser) ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4502 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4503 | if (VG_(clo_read_var_info)) { |
| 4504 | /* We'll park the harvested type information in here. Also create |
| 4505 | a fake "void" entry with offset D3_FAKEVOID_CUOFF, so we always |
| 4506 | have at least one type entry to refer to. D3_FAKEVOID_CUOFF is |
| 4507 | huge and presumably will not occur in any valid DWARF3 file -- |
| 4508 | it would need to have a .debug_info section 4GB long for that to |
| 4509 | happen. These type entries end up in the DebugInfo. */ |
| 4510 | tyents = VG_(newXA)( ML_(dinfo_zalloc), |
| 4511 | "di.readdwarf3.ndrw.1 (TyEnt temp array)", |
| 4512 | ML_(dinfo_free), sizeof(TyEnt) ); |
| 4513 | { TyEnt tyent; |
| 4514 | VG_(memset)(&tyent, 0, sizeof(tyent)); |
| 4515 | tyent.tag = Te_TyVoid; |
| 4516 | tyent.cuOff = D3_FAKEVOID_CUOFF; |
| 4517 | tyent.Te.TyVoid.isFake = True; |
| 4518 | VG_(addToXA)( tyents, &tyent ); |
| 4519 | } |
| 4520 | { TyEnt tyent; |
| 4521 | VG_(memset)(&tyent, 0, sizeof(tyent)); |
| 4522 | tyent.tag = Te_UNKNOWN; |
| 4523 | tyent.cuOff = D3_INVALID_CUOFF; |
| 4524 | VG_(addToXA)( tyents, &tyent ); |
| 4525 | } |
| 4526 | |
| 4527 | /* This is a tree used to unique-ify the range lists that are |
| 4528 | manufactured by parse_var_DIE. References to the keys in the |
| 4529 | tree wind up in .rngMany fields in TempVars. We'll need to |
| 4530 | delete this tree, and the XArrays attached to it, at the end of |
| 4531 | this function. */ |
| 4532 | rangestree = VG_(newFM)( ML_(dinfo_zalloc), |
| 4533 | "di.readdwarf3.ndrw.2 (rangestree)", |
| 4534 | ML_(dinfo_free), |
| 4535 | (Word(*)(UWord,UWord))cmp__XArrays_of_AddrRange ); |
| 4536 | |
| 4537 | /* List of variables we're accumulating. These don't end up in the |
| 4538 | DebugInfo; instead their contents are handed to ML_(addVar) and |
| 4539 | the list elements are then deleted. */ |
| 4540 | tempvars = VG_(newXA)( ML_(dinfo_zalloc), |
| 4541 | "di.readdwarf3.ndrw.3 (TempVar*s array)", |
| 4542 | ML_(dinfo_free), |
| 4543 | sizeof(TempVar*) ); |
| 4544 | |
| 4545 | /* List of GExprs we're accumulating. These wind up in the |
| 4546 | DebugInfo. */ |
| 4547 | gexprs = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.ndrw.4", |
| 4548 | ML_(dinfo_free), sizeof(GExpr*) ); |
| 4549 | |
| 4550 | /* We need a D3TypeParser to keep track of partially constructed |
| 4551 | types. It'll be discarded as soon as we've completed the CU, |
| 4552 | since the resulting information is tipped in to 'tyents' as it |
| 4553 | is generated. */ |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 4554 | type_parser_init(&typarser); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4555 | |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 4556 | var_parser_init(&varparser); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4557 | |
| 4558 | signature_types = VG_(HT_construct) ("signature_types"); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 4559 | } |
| 4560 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4561 | /* Do an initial pass to scan the .debug_types section, if any, and |
| 4562 | fill in the signatured types hash table. This lets us handle |
| 4563 | mapping from a type signature to a (cooked) DIE offset directly |
| 4564 | in get_Form_contents. */ |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4565 | if (VG_(clo_read_var_info) && ML_(sli_is_valid)(escn_debug_types)) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4566 | init_Cursor( &info, escn_debug_types, 0, barf, |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4567 | "Overrun whilst reading .debug_types section" ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4568 | TRACE_D3("\n------ Collecting signatures from " |
| 4569 | ".debug_types section ------\n"); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4570 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4571 | while (True) { |
| 4572 | UWord cu_start_offset, cu_offset_now; |
| 4573 | CUConst cc; |
| 4574 | |
| 4575 | cu_start_offset = get_position_of_Cursor( &info ); |
| 4576 | TRACE_D3("\n"); |
| 4577 | TRACE_D3(" Compilation Unit @ offset 0x%lx:\n", cu_start_offset); |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 4578 | /* parse_CU_header initialises the CU's abbv hash table. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4579 | parse_CU_Header( &cc, td3, &info, escn_debug_abbv, True, False ); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4580 | |
| 4581 | /* Needed by cook_die. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4582 | cc.types_cuOff_bias = escn_debug_info.szB; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4583 | |
| 4584 | record_signatured_type( signature_types, cc.type_signature, |
| 4585 | cook_die( &cc, cc.type_offset )); |
| 4586 | |
| 4587 | /* Until proven otherwise we assume we don't need the icc9 |
| 4588 | workaround in this case; see the DIE-reading loop below |
| 4589 | for details. */ |
| 4590 | cu_offset_now = (cu_start_offset + cc.unit_length |
| 4591 | + (cc.is_dw64 ? 12 : 4)); |
| 4592 | |
philippe | ede7291 | 2015-08-25 21:39:44 +0000 | [diff] [blame] | 4593 | clear_CUConst ( &cc); |
| 4594 | |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 4595 | if (cu_offset_now >= escn_debug_types.szB) { |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4596 | break; |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 4597 | } |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4598 | |
| 4599 | set_position_of_Cursor ( &info, cu_offset_now ); |
| 4600 | } |
| 4601 | } |
| 4602 | |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 4603 | /* Perform three DIE-reading passes. The first pass reads DIEs from |
| 4604 | alternate .debug_info (if any), the second pass reads DIEs from |
| 4605 | .debug_info, and the third pass reads DIEs from .debug_types. |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4606 | Moving the body of this loop into a separate function would |
| 4607 | require a large number of arguments to be passed in, so it is |
| 4608 | kept inline instead. */ |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 4609 | for (pass = 0; pass < 3; ++pass) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4610 | ULong section_size; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4611 | |
| 4612 | if (pass == 0) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4613 | if (!ML_(sli_is_valid)(escn_debug_info_alt)) |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 4614 | continue; |
| 4615 | /* Now loop over the Compilation Units listed in the alternate |
| 4616 | .debug_info section (see D3SPEC sec 7.5) paras 1 and 2. |
| 4617 | Each compilation unit contains a Compilation Unit Header |
| 4618 | followed by precisely one DW_TAG_compile_unit or |
| 4619 | DW_TAG_partial_unit DIE. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4620 | init_Cursor( &info, escn_debug_info_alt, 0, barf, |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 4621 | "Overrun whilst reading alternate .debug_info section" ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4622 | section_size = escn_debug_info_alt.szB; |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 4623 | |
| 4624 | TRACE_D3("\n------ Parsing alternate .debug_info section ------\n"); |
| 4625 | } else if (pass == 1) { |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4626 | /* Now loop over the Compilation Units listed in the .debug_info |
| 4627 | section (see D3SPEC sec 7.5) paras 1 and 2. Each compilation |
| 4628 | unit contains a Compilation Unit Header followed by precisely |
| 4629 | one DW_TAG_compile_unit or DW_TAG_partial_unit DIE. */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4630 | init_Cursor( &info, escn_debug_info, 0, barf, |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4631 | "Overrun whilst reading .debug_info section" ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4632 | section_size = escn_debug_info.szB; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4633 | |
| 4634 | TRACE_D3("\n------ Parsing .debug_info section ------\n"); |
| 4635 | } else { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4636 | if (!ML_(sli_is_valid)(escn_debug_types)) |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4637 | continue; |
philippe | e504887 | 2014-06-15 19:16:46 +0000 | [diff] [blame] | 4638 | if (!VG_(clo_read_var_info)) |
| 4639 | continue; // Types not needed when only reading inline info. |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4640 | init_Cursor( &info, escn_debug_types, 0, barf, |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4641 | "Overrun whilst reading .debug_types section" ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4642 | section_size = escn_debug_types.szB; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4643 | |
| 4644 | TRACE_D3("\n------ Parsing .debug_types section ------\n"); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4645 | } |
| 4646 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4647 | while (True) { |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4648 | ULong cu_start_offset, cu_offset_now; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4649 | CUConst cc; |
| 4650 | /* It may be that the stated size of this CU is larger than the |
| 4651 | amount of stuff actually in it. icc9 seems to generate CUs |
| 4652 | thusly. We use these variables to figure out if this is |
| 4653 | indeed the case, and if so how many bytes we need to skip to |
| 4654 | get to the start of the next CU. Not skipping those bytes |
| 4655 | causes us to misidentify the start of the next CU, and it all |
| 4656 | goes badly wrong after that (not surprisingly). */ |
| 4657 | UWord cu_size_including_IniLen, cu_amount_used; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4658 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4659 | /* It seems icc9 finishes the DIE info before debug_info_sz |
| 4660 | bytes have been used up. So be flexible, and declare the |
| 4661 | sequence complete if there is not enough remaining bytes to |
| 4662 | hold even the smallest conceivable CU header. (11 bytes I |
| 4663 | reckon). */ |
| 4664 | /* JRS 23Jan09: I suspect this is no longer necessary now that |
| 4665 | the code below contains a 'while (cu_amount_used < |
| 4666 | cu_size_including_IniLen ...' style loop, which skips over |
| 4667 | any leftover bytes at the end of a CU in the case where the |
| 4668 | CU's stated size is larger than its actual size (as |
| 4669 | determined by reading all its DIEs). However, for prudence, |
| 4670 | I'll leave the following test in place. I can't see that a |
| 4671 | CU header can be smaller than 11 bytes, so I don't think |
| 4672 | there's any harm possible through the test -- it just adds |
| 4673 | robustness. */ |
| 4674 | Word avail = get_remaining_length_Cursor( &info ); |
| 4675 | if (avail < 11) { |
| 4676 | if (avail > 0) |
| 4677 | TRACE_D3("new_dwarf3_reader_wrk: warning: " |
| 4678 | "%ld unused bytes after end of DIEs\n", avail); |
| 4679 | break; |
| 4680 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4681 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4682 | if (VG_(clo_read_var_info)) { |
| 4683 | /* Check the varparser's stack is in a sane state. */ |
| 4684 | vg_assert(varparser.sp == -1); |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 4685 | /* Check the typarser's stack is in a sane state. */ |
| 4686 | vg_assert(typarser.sp == -1); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4687 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4688 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4689 | cu_start_offset = get_position_of_Cursor( &info ); |
| 4690 | TRACE_D3("\n"); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4691 | TRACE_D3(" Compilation Unit @ offset 0x%llx:\n", cu_start_offset); |
philippe | 0d2ea9d | 2014-06-15 18:28:31 +0000 | [diff] [blame] | 4692 | /* parse_CU_header initialises the CU's hashtable of abbvs ht_abbvs */ |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4693 | if (pass == 0) { |
| 4694 | parse_CU_Header( &cc, td3, &info, escn_debug_abbv_alt, |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 4695 | False, True ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4696 | } else { |
| 4697 | parse_CU_Header( &cc, td3, &info, escn_debug_abbv, |
sewardj | f7c9714 | 2012-07-14 09:59:01 +0000 | [diff] [blame] | 4698 | pass == 2, False ); |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4699 | } |
| 4700 | cc.escn_debug_str = pass == 0 ? escn_debug_str_alt |
| 4701 | : escn_debug_str; |
| 4702 | cc.escn_debug_ranges = escn_debug_ranges; |
| 4703 | cc.escn_debug_loc = escn_debug_loc; |
| 4704 | cc.escn_debug_line = pass == 0 ? escn_debug_line_alt |
| 4705 | : escn_debug_line; |
| 4706 | cc.escn_debug_info = pass == 0 ? escn_debug_info_alt |
| 4707 | : escn_debug_info; |
| 4708 | cc.escn_debug_types = escn_debug_types; |
| 4709 | cc.escn_debug_info_alt = escn_debug_info_alt; |
| 4710 | cc.escn_debug_str_alt = escn_debug_str_alt; |
| 4711 | cc.types_cuOff_bias = escn_debug_info.szB; |
| 4712 | cc.alt_cuOff_bias = escn_debug_info.szB + escn_debug_types.szB; |
| 4713 | cc.cu_start_offset = cu_start_offset; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4714 | cc.di = di; |
| 4715 | /* The CU's svma can be deduced by looking at the AT_low_pc |
| 4716 | value in the top level TAG_compile_unit, which is the topmost |
| 4717 | DIE. We'll leave it for the 'varparser' to acquire that info |
| 4718 | and fill it in -- since it is the only party to want to know |
| 4719 | it. */ |
| 4720 | cc.cu_svma_known = False; |
| 4721 | cc.cu_svma = 0; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4722 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4723 | if (VG_(clo_read_var_info)) { |
| 4724 | cc.signature_types = signature_types; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4725 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4726 | /* Create a fake outermost-level range covering the entire |
| 4727 | address range. So we always have *something* to catch all |
| 4728 | variable declarations. */ |
| 4729 | varstack_push( &cc, &varparser, td3, |
| 4730 | unitary_range_list(0UL, ~0UL), |
| 4731 | -1, False/*isFunc*/, NULL/*fbGX*/ ); |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 4732 | |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 4733 | /* And set up the fndn_ix_Table. When we come across the top |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4734 | level DIE for this CU (which is what the next call to |
| 4735 | read_DIE should process) we will copy all the file names out |
| 4736 | of the .debug_line img area and use this table to look up the |
| 4737 | copies when we later see filename numbers in DW_TAG_variables |
| 4738 | etc. */ |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 4739 | vg_assert(!varparser.fndn_ix_Table ); |
| 4740 | varparser.fndn_ix_Table |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4741 | = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.ndrw.5var", |
| 4742 | ML_(dinfo_free), |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 4743 | sizeof(UInt) ); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4744 | } |
| 4745 | |
| 4746 | if (VG_(clo_read_inline_info)) { |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 4747 | /* fndn_ix_Table for the inlined call parser */ |
| 4748 | vg_assert(!inlparser.fndn_ix_Table ); |
| 4749 | inlparser.fndn_ix_Table |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4750 | = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.ndrw.5inl", |
| 4751 | ML_(dinfo_free), |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 4752 | sizeof(UInt) ); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4753 | } |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 4754 | |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4755 | /* Now read the one-and-only top-level DIE for this CU. */ |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4756 | vg_assert(!VG_(clo_read_var_info) || varparser.sp == 0); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4757 | read_DIE( rangestree, |
| 4758 | tyents, tempvars, gexprs, |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4759 | &typarser, &varparser, &inlparser, |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4760 | &info, td3, &cc, 0 ); |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 4761 | |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 4762 | cu_offset_now = get_position_of_Cursor( &info ); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4763 | |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 4764 | if (0) VG_(printf)("Travelled: %llu size %llu\n", |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4765 | cu_offset_now - cc.cu_start_offset, |
| 4766 | cc.unit_length + (cc.is_dw64 ? 12 : 4)); |
| 4767 | |
| 4768 | /* How big the CU claims it is .. */ |
| 4769 | cu_size_including_IniLen = cc.unit_length + (cc.is_dw64 ? 12 : 4); |
| 4770 | /* .. vs how big we have found it to be */ |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 4771 | cu_amount_used = cu_offset_now - cc.cu_start_offset; |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4772 | |
florian | c6e5d76 | 2015-08-05 22:27:24 +0000 | [diff] [blame] | 4773 | if (1) TRACE_D3("offset now %llu, d-i-size %llu\n", |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4774 | cu_offset_now, section_size); |
| 4775 | if (cu_offset_now > section_size) |
| 4776 | barf("toplevel DIEs beyond end of CU"); |
| 4777 | |
| 4778 | /* If the CU is bigger than it claims to be, we've got a serious |
| 4779 | problem. */ |
| 4780 | if (cu_amount_used > cu_size_including_IniLen) |
| 4781 | barf("CU's actual size appears to be larger than it claims it is"); |
| 4782 | |
| 4783 | /* If the CU is smaller than it claims to be, we need to skip some |
| 4784 | bytes. Loop updates cu_offset_new and cu_amount_used. */ |
| 4785 | while (cu_amount_used < cu_size_including_IniLen |
| 4786 | && get_remaining_length_Cursor( &info ) > 0) { |
| 4787 | if (0) VG_(printf)("SKIP\n"); |
| 4788 | (void)get_UChar( &info ); |
| 4789 | cu_offset_now = get_position_of_Cursor( &info ); |
| 4790 | cu_amount_used = cu_offset_now - cc.cu_start_offset; |
| 4791 | } |
| 4792 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4793 | if (VG_(clo_read_var_info)) { |
| 4794 | /* Preen to level -2. DIEs have level >= 0 so -2 cannot occur |
| 4795 | anywhere else at all. Our fake the-entire-address-space |
| 4796 | range is at level -1, so preening to -2 should completely |
| 4797 | empty the stack out. */ |
| 4798 | TRACE_D3("\n"); |
| 4799 | varstack_preen( &varparser, td3, -2 ); |
| 4800 | /* Similarly, empty the type stack out. */ |
| 4801 | typestack_preen( &typarser, td3, -2 ); |
| 4802 | } |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4803 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4804 | if (VG_(clo_read_var_info)) { |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 4805 | vg_assert(varparser.fndn_ix_Table ); |
| 4806 | VG_(deleteXA)( varparser.fndn_ix_Table ); |
| 4807 | varparser.fndn_ix_Table = NULL; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4808 | } |
| 4809 | if (VG_(clo_read_inline_info)) { |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 4810 | vg_assert(inlparser.fndn_ix_Table ); |
| 4811 | VG_(deleteXA)( inlparser.fndn_ix_Table ); |
| 4812 | inlparser.fndn_ix_Table = NULL; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4813 | } |
philippe | 746e97e | 2014-06-15 10:51:14 +0000 | [diff] [blame] | 4814 | clear_CUConst(&cc); |
sewardj | d935068 | 2012-04-05 07:55:47 +0000 | [diff] [blame] | 4815 | |
| 4816 | if (cu_offset_now == section_size) |
| 4817 | break; |
| 4818 | /* else keep going */ |
sewardj | 055b0f8 | 2009-01-24 00:04:28 +0000 | [diff] [blame] | 4819 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4820 | } |
| 4821 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4822 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4823 | if (VG_(clo_read_var_info)) { |
| 4824 | /* From here on we're post-processing the stuff we got |
| 4825 | out of the .debug_info section. */ |
philippe | e0bd591 | 2014-06-21 09:48:17 +0000 | [diff] [blame] | 4826 | if (TD3) { |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4827 | TRACE_D3("\n"); |
| 4828 | ML_(pp_TyEnts)(tyents, "Initial type entity (TyEnt) array"); |
| 4829 | TRACE_D3("\n"); |
| 4830 | TRACE_D3("------ Compressing type entries ------\n"); |
| 4831 | } |
| 4832 | |
| 4833 | tyents_cache = ML_(dinfo_zalloc)( "di.readdwarf3.ndrw.6", |
| 4834 | sizeof(TyEntIndexCache) ); |
| 4835 | ML_(TyEntIndexCache__invalidate)( tyents_cache ); |
| 4836 | dedup_types( td3, tyents, tyents_cache ); |
philippe | e0bd591 | 2014-06-21 09:48:17 +0000 | [diff] [blame] | 4837 | if (TD3) { |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4838 | TRACE_D3("\n"); |
| 4839 | ML_(pp_TyEnts)(tyents, "After type entity (TyEnt) compression"); |
| 4840 | } |
| 4841 | |
| 4842 | TRACE_D3("\n"); |
| 4843 | TRACE_D3("------ Resolving the types of variables ------\n" ); |
| 4844 | resolve_variable_types( barf, tyents, tyents_cache, tempvars ); |
| 4845 | |
| 4846 | /* Copy all the non-INDIR tyents into a new table. For large |
| 4847 | .so's, about 90% of the tyents will by now have been resolved to |
| 4848 | INDIRs, and we no longer need them, and so don't need to store |
| 4849 | them. */ |
| 4850 | tyents_to_keep |
| 4851 | = VG_(newXA)( ML_(dinfo_zalloc), |
| 4852 | "di.readdwarf3.ndrw.7 (TyEnt to-keep array)", |
| 4853 | ML_(dinfo_free), sizeof(TyEnt) ); |
| 4854 | n = VG_(sizeXA)( tyents ); |
| 4855 | for (i = 0; i < n; i++) { |
| 4856 | TyEnt* ent = VG_(indexXA)( tyents, i ); |
| 4857 | if (ent->tag != Te_INDIR) |
| 4858 | VG_(addToXA)( tyents_to_keep, ent ); |
| 4859 | } |
| 4860 | |
| 4861 | VG_(deleteXA)( tyents ); |
| 4862 | tyents = NULL; |
| 4863 | ML_(dinfo_free)( tyents_cache ); |
| 4864 | tyents_cache = NULL; |
| 4865 | |
| 4866 | /* Sort tyents_to_keep so we can lookup in it. A complete (if |
| 4867 | minor) waste of time, since tyents itself is sorted, but |
| 4868 | necessary since VG_(lookupXA) refuses to cooperate if we |
| 4869 | don't. */ |
| 4870 | VG_(setCmpFnXA)( tyents_to_keep, (XACmpFn_t) ML_(TyEnt__cmp_by_cuOff_only) ); |
| 4871 | VG_(sortXA)( tyents_to_keep ); |
| 4872 | |
| 4873 | /* Enable cacheing on tyents_to_keep */ |
| 4874 | tyents_to_keep_cache |
| 4875 | = ML_(dinfo_zalloc)( "di.readdwarf3.ndrw.8", |
| 4876 | sizeof(TyEntIndexCache) ); |
| 4877 | ML_(TyEntIndexCache__invalidate)( tyents_to_keep_cache ); |
| 4878 | |
| 4879 | /* And record the tyents in the DebugInfo. We do this before |
| 4880 | starting to hand variables to ML_(addVar), since if ML_(addVar) |
| 4881 | wants to do debug printing (of the types of said vars) then it |
| 4882 | will need the tyents.*/ |
| 4883 | vg_assert(!di->admin_tyents); |
| 4884 | di->admin_tyents = tyents_to_keep; |
| 4885 | |
| 4886 | /* Bias all the location expressions. */ |
| 4887 | TRACE_D3("\n"); |
| 4888 | TRACE_D3("------ Biasing the location expressions ------\n" ); |
| 4889 | |
| 4890 | n = VG_(sizeXA)( gexprs ); |
| 4891 | for (i = 0; i < n; i++) { |
| 4892 | gexpr = *(GExpr**)VG_(indexXA)( gexprs, i ); |
| 4893 | bias_GX( gexpr, di ); |
| 4894 | } |
| 4895 | |
| 4896 | TRACE_D3("\n"); |
| 4897 | TRACE_D3("------ Acquired the following variables: ------\n\n"); |
| 4898 | |
| 4899 | /* Park (pointers to) all the vars in an XArray, so we can look up |
| 4900 | abstract origins quickly. The array is sorted (hence, looked-up |
| 4901 | by) the .dioff fields. Since the .dioffs should be in strictly |
| 4902 | ascending order, there is no need to sort the array after |
| 4903 | construction. The ascendingness is however asserted for. */ |
| 4904 | dioff_lookup_tab |
| 4905 | = VG_(newXA)( ML_(dinfo_zalloc), "di.readdwarf3.ndrw.9", |
| 4906 | ML_(dinfo_free), |
| 4907 | sizeof(TempVar*) ); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4908 | |
| 4909 | n = VG_(sizeXA)( tempvars ); |
| 4910 | Word first_primary_var = 0; |
| 4911 | for (first_primary_var = 0; |
| 4912 | escn_debug_info_alt.szB/*really?*/ && first_primary_var < n; |
| 4913 | first_primary_var++) { |
| 4914 | varp = *(TempVar**)VG_(indexXA)( tempvars, first_primary_var ); |
| 4915 | if (varp->dioff < escn_debug_info.szB + escn_debug_types.szB) |
| 4916 | break; |
| 4917 | } |
| 4918 | for (i = 0; i < n; i++) { |
| 4919 | varp = *(TempVar**)VG_(indexXA)( tempvars, (i + first_primary_var) % n ); |
| 4920 | if (i > first_primary_var) { |
| 4921 | varp2 = *(TempVar**)VG_(indexXA)( tempvars, |
| 4922 | (i + first_primary_var - 1) % n ); |
| 4923 | /* why should this hold? Only, I think, because we've |
| 4924 | constructed the array by reading .debug_info sequentially, |
| 4925 | and so the array .dioff fields should reflect that, and be |
| 4926 | strictly ascending. */ |
| 4927 | vg_assert(varp2->dioff < varp->dioff); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4928 | } |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4929 | VG_(addToXA)( dioff_lookup_tab, &varp ); |
| 4930 | } |
| 4931 | VG_(setCmpFnXA)( dioff_lookup_tab, cmp_TempVar_by_dioff ); |
| 4932 | VG_(sortXA)( dioff_lookup_tab ); /* POINTLESS; FIXME: rm */ |
| 4933 | |
| 4934 | /* Now visit each var. Collect up as much info as possible for |
| 4935 | each var and hand it to ML_(addVar). */ |
| 4936 | n = VG_(sizeXA)( tempvars ); |
| 4937 | for (j = 0; j < n; j++) { |
| 4938 | TyEnt* ent; |
| 4939 | varp = *(TempVar**)VG_(indexXA)( tempvars, j ); |
| 4940 | |
| 4941 | /* Possibly show .. */ |
philippe | e0bd591 | 2014-06-21 09:48:17 +0000 | [diff] [blame] | 4942 | if (TD3) { |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4943 | VG_(printf)("<%lx> addVar: level %d: %s :: ", |
| 4944 | varp->dioff, |
| 4945 | varp->level, |
| 4946 | varp->name ? varp->name : "<anon_var>" ); |
| 4947 | if (varp->typeR) { |
| 4948 | ML_(pp_TyEnt_C_ishly)( tyents_to_keep, varp->typeR ); |
| 4949 | } else { |
| 4950 | VG_(printf)("NULL"); |
| 4951 | } |
| 4952 | VG_(printf)("\n Loc="); |
| 4953 | if (varp->gexpr) { |
| 4954 | ML_(pp_GX)(varp->gexpr); |
| 4955 | } else { |
| 4956 | VG_(printf)("NULL"); |
| 4957 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4958 | VG_(printf)("\n"); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4959 | if (varp->fbGX) { |
| 4960 | VG_(printf)(" FrB="); |
| 4961 | ML_(pp_GX)( varp->fbGX ); |
| 4962 | VG_(printf)("\n"); |
| 4963 | } else { |
| 4964 | VG_(printf)(" FrB=none\n"); |
| 4965 | } |
florian | c6e5d76 | 2015-08-05 22:27:24 +0000 | [diff] [blame] | 4966 | VG_(printf)(" declared at: %u %s:%d\n", |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 4967 | varp->fndn_ix, |
| 4968 | ML_(fndn_ix2filename) (di, varp->fndn_ix), |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4969 | varp->fLine ); |
| 4970 | if (varp->absOri != (UWord)D3_INVALID_CUOFF) |
| 4971 | VG_(printf)(" abstract origin: <%lx>\n", varp->absOri); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4972 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4973 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4974 | /* Skip variables which have no location. These must be |
| 4975 | abstract instances; they are useless as-is since with no |
| 4976 | location they have no specified memory location. They will |
| 4977 | presumably be referred to via the absOri fields of other |
| 4978 | variables. */ |
| 4979 | if (!varp->gexpr) { |
| 4980 | TRACE_D3(" SKIP (no location)\n\n"); |
sewardj | bdee918 | 2010-10-08 23:57:25 +0000 | [diff] [blame] | 4981 | continue; |
| 4982 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 4983 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 4984 | /* So it has a location, at least. If it refers to some other |
| 4985 | entry through its absOri field, pull in further info through |
| 4986 | that. */ |
| 4987 | if (varp->absOri != (UWord)D3_INVALID_CUOFF) { |
| 4988 | Bool found; |
| 4989 | Word ixFirst, ixLast; |
| 4990 | TempVar key; |
| 4991 | TempVar* keyp = &key; |
| 4992 | TempVar *varAI; |
| 4993 | VG_(memset)(&key, 0, sizeof(key)); /* not necessary */ |
| 4994 | key.dioff = varp->absOri; /* this is what we want to find */ |
| 4995 | found = VG_(lookupXA)( dioff_lookup_tab, &keyp, |
| 4996 | &ixFirst, &ixLast ); |
| 4997 | if (!found) { |
| 4998 | /* barf("DW_AT_abstract_origin can't be resolved"); */ |
| 4999 | TRACE_D3(" SKIP (DW_AT_abstract_origin can't be resolved)\n\n"); |
| 5000 | continue; |
| 5001 | } |
| 5002 | /* If the following fails, there is more than one entry with |
| 5003 | the same dioff. Which can't happen. */ |
| 5004 | vg_assert(ixFirst == ixLast); |
| 5005 | varAI = *(TempVar**)VG_(indexXA)( dioff_lookup_tab, ixFirst ); |
| 5006 | /* stay sane */ |
| 5007 | vg_assert(varAI); |
| 5008 | vg_assert(varAI->dioff == varp->absOri); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5009 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 5010 | /* Copy what useful info we can. */ |
| 5011 | if (varAI->typeR && !varp->typeR) |
| 5012 | varp->typeR = varAI->typeR; |
| 5013 | if (varAI->name && !varp->name) |
| 5014 | varp->name = varAI->name; |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 5015 | if (varAI->fndn_ix && !varp->fndn_ix) |
| 5016 | varp->fndn_ix = varAI->fndn_ix; |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 5017 | if (varAI->fLine > 0 && varp->fLine == 0) |
| 5018 | varp->fLine = varAI->fLine; |
| 5019 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5020 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 5021 | /* Give it a name if it doesn't have one. */ |
| 5022 | if (!varp->name) |
| 5023 | varp->name = ML_(addStr)( di, "<anon_var>", -1 ); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 5024 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 5025 | /* So now does it have enough info to be useful? */ |
| 5026 | /* NOTE: re typeR: this is a hack. If typeR is Te_UNKNOWN then |
| 5027 | the type didn't get resolved. Really, in that case |
| 5028 | something's broken earlier on, and should be fixed, rather |
| 5029 | than just skipping the variable. */ |
| 5030 | ent = ML_(TyEnts__index_by_cuOff)( tyents_to_keep, |
| 5031 | tyents_to_keep_cache, |
| 5032 | varp->typeR ); |
| 5033 | /* The next two assertions should be guaranteed by |
| 5034 | our previous call to resolve_variable_types. */ |
| 5035 | vg_assert(ent); |
| 5036 | vg_assert(ML_(TyEnt__is_type)(ent) || ent->tag == Te_UNKNOWN); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 5037 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 5038 | if (ent->tag == Te_UNKNOWN) continue; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5039 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 5040 | vg_assert(varp->gexpr); |
| 5041 | vg_assert(varp->name); |
| 5042 | vg_assert(varp->typeR); |
| 5043 | vg_assert(varp->level >= 0); |
| 5044 | |
| 5045 | /* Ok. So we're going to keep it. Call ML_(addVar) once for |
| 5046 | each address range in which the variable exists. */ |
| 5047 | TRACE_D3(" ACQUIRE for range(s) "); |
| 5048 | { AddrRange oneRange; |
| 5049 | AddrRange* varPcRanges; |
| 5050 | Word nVarPcRanges; |
| 5051 | /* Set up to iterate over address ranges, however |
| 5052 | represented. */ |
| 5053 | if (varp->nRanges == 0 || varp->nRanges == 1) { |
| 5054 | vg_assert(!varp->rngMany); |
| 5055 | if (varp->nRanges == 0) { |
| 5056 | vg_assert(varp->rngOneMin == 0); |
| 5057 | vg_assert(varp->rngOneMax == 0); |
| 5058 | } |
| 5059 | nVarPcRanges = varp->nRanges; |
| 5060 | oneRange.aMin = varp->rngOneMin; |
| 5061 | oneRange.aMax = varp->rngOneMax; |
| 5062 | varPcRanges = &oneRange; |
| 5063 | } else { |
| 5064 | vg_assert(varp->rngMany); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5065 | vg_assert(varp->rngOneMin == 0); |
| 5066 | vg_assert(varp->rngOneMax == 0); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 5067 | nVarPcRanges = VG_(sizeXA)(varp->rngMany); |
| 5068 | vg_assert(nVarPcRanges >= 2); |
| 5069 | vg_assert(nVarPcRanges == (Word)varp->nRanges); |
| 5070 | varPcRanges = VG_(indexXA)(varp->rngMany, 0); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5071 | } |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 5072 | if (varp->level == 0) |
| 5073 | vg_assert( nVarPcRanges == 1 ); |
| 5074 | /* and iterate */ |
| 5075 | for (i = 0; i < nVarPcRanges; i++) { |
| 5076 | Addr pcMin = varPcRanges[i].aMin; |
| 5077 | Addr pcMax = varPcRanges[i].aMax; |
| 5078 | vg_assert(pcMin <= pcMax); |
| 5079 | /* Level 0 is the global address range. So at level 0 we |
| 5080 | don't want to bias pcMin/pcMax; but at all other levels |
| 5081 | we do since those are derived from svmas in the Dwarf |
| 5082 | we're reading. Be paranoid ... */ |
| 5083 | if (varp->level == 0) { |
| 5084 | vg_assert(pcMin == (Addr)0); |
| 5085 | vg_assert(pcMax == ~(Addr)0); |
| 5086 | } else { |
| 5087 | /* vg_assert(pcMin > (Addr)0); |
| 5088 | No .. we can legitimately expect to see ranges like |
| 5089 | 0x0-0x11D (pre-biasing, of course). */ |
| 5090 | vg_assert(pcMax < ~(Addr)0); |
| 5091 | } |
| 5092 | |
| 5093 | /* Apply text biasing, for non-global variables. */ |
| 5094 | if (varp->level > 0) { |
| 5095 | pcMin += di->text_debug_bias; |
| 5096 | pcMax += di->text_debug_bias; |
| 5097 | } |
| 5098 | |
| 5099 | if (i > 0 && (i%2) == 0) |
| 5100 | TRACE_D3("\n "); |
| 5101 | TRACE_D3("[%#lx,%#lx] ", pcMin, pcMax ); |
| 5102 | |
| 5103 | ML_(addVar)( |
| 5104 | di, varp->level, |
| 5105 | pcMin, pcMax, |
| 5106 | varp->name, varp->typeR, |
| 5107 | varp->gexpr, varp->fbGX, |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 5108 | varp->fndn_ix, varp->fLine, td3 |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 5109 | ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5110 | } |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 5111 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5112 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 5113 | TRACE_D3("\n\n"); |
| 5114 | /* and move on to the next var */ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5115 | } |
| 5116 | |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 5117 | /* Now free all the TempVars */ |
| 5118 | n = VG_(sizeXA)( tempvars ); |
| 5119 | for (i = 0; i < n; i++) { |
| 5120 | varp = *(TempVar**)VG_(indexXA)( tempvars, i ); |
| 5121 | ML_(dinfo_free)(varp); |
| 5122 | } |
| 5123 | VG_(deleteXA)( tempvars ); |
| 5124 | tempvars = NULL; |
| 5125 | |
| 5126 | /* and the temp lookup table */ |
| 5127 | VG_(deleteXA)( dioff_lookup_tab ); |
| 5128 | |
| 5129 | /* and the ranges tree. Note that we need to also free the XArrays |
| 5130 | which constitute the keys, hence pass VG_(deleteXA) as a |
| 5131 | key-finalizer. */ |
| 5132 | VG_(deleteFM)( rangestree, (void(*)(UWord))VG_(deleteXA), NULL ); |
| 5133 | |
| 5134 | /* and the tyents_to_keep cache */ |
| 5135 | ML_(dinfo_free)( tyents_to_keep_cache ); |
| 5136 | tyents_to_keep_cache = NULL; |
| 5137 | |
philippe | 666ee9d | 2014-08-08 22:11:41 +0000 | [diff] [blame] | 5138 | vg_assert( varparser.fndn_ix_Table == NULL ); |
philippe | a0a7393 | 2014-06-15 15:42:20 +0000 | [diff] [blame] | 5139 | |
| 5140 | /* And the signatured type hash. */ |
| 5141 | VG_(HT_destruct) ( signature_types, ML_(dinfo_free) ); |
| 5142 | |
| 5143 | /* record the GExprs in di so they can be freed later */ |
| 5144 | vg_assert(!di->admin_gexprs); |
| 5145 | di->admin_gexprs = gexprs; |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5146 | } |
florian | 611fd68 | 2014-12-07 18:58:59 +0000 | [diff] [blame] | 5147 | |
| 5148 | // Free up dynamically allocated memory |
| 5149 | if (VG_(clo_read_var_info)) { |
| 5150 | type_parser_release(&typarser); |
| 5151 | var_parser_release(&varparser); |
| 5152 | } |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5153 | } |
| 5154 | |
| 5155 | |
| 5156 | /*------------------------------------------------------------*/ |
| 5157 | /*--- ---*/ |
| 5158 | /*--- The "new" DWARF3 reader -- top level control logic ---*/ |
| 5159 | /*--- ---*/ |
| 5160 | /*------------------------------------------------------------*/ |
| 5161 | |
sewardj | 6c591e1 | 2011-04-11 16:17:51 +0000 | [diff] [blame] | 5162 | static Bool d3rd_jmpbuf_valid = False; |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 5163 | static const HChar* d3rd_jmpbuf_reason = NULL; |
sewardj | 97d3ebb | 2011-04-11 18:36:34 +0000 | [diff] [blame] | 5164 | static VG_MINIMAL_JMP_BUF(d3rd_jmpbuf); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5165 | |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 5166 | static __attribute__((noreturn)) void barf ( const HChar* reason ) { |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5167 | vg_assert(d3rd_jmpbuf_valid); |
| 5168 | d3rd_jmpbuf_reason = reason; |
sewardj | 6c591e1 | 2011-04-11 16:17:51 +0000 | [diff] [blame] | 5169 | VG_MINIMAL_LONGJMP(d3rd_jmpbuf); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5170 | /*NOTREACHED*/ |
| 5171 | vg_assert(0); |
| 5172 | } |
| 5173 | |
| 5174 | |
| 5175 | void |
| 5176 | ML_(new_dwarf3_reader) ( |
florian | 518850b | 2014-10-22 22:25:30 +0000 | [diff] [blame] | 5177 | DebugInfo* di, |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 5178 | DiSlice escn_debug_info, DiSlice escn_debug_types, |
| 5179 | DiSlice escn_debug_abbv, DiSlice escn_debug_line, |
| 5180 | DiSlice escn_debug_str, DiSlice escn_debug_ranges, |
| 5181 | DiSlice escn_debug_loc, DiSlice escn_debug_info_alt, |
| 5182 | DiSlice escn_debug_abbv_alt, DiSlice escn_debug_line_alt, |
| 5183 | DiSlice escn_debug_str_alt |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5184 | ) |
| 5185 | { |
| 5186 | volatile Int jumped; |
| 5187 | volatile Bool td3 = di->trace_symtab; |
| 5188 | |
| 5189 | /* Run the _wrk function to read the dwarf3. If it succeeds, it |
| 5190 | just returns normally. If there is any failure, it longjmp's |
| 5191 | back here, having first set d3rd_jmpbuf_reason to something |
| 5192 | useful. */ |
| 5193 | vg_assert(d3rd_jmpbuf_valid == False); |
| 5194 | vg_assert(d3rd_jmpbuf_reason == NULL); |
| 5195 | |
| 5196 | d3rd_jmpbuf_valid = True; |
sewardj | 6c591e1 | 2011-04-11 16:17:51 +0000 | [diff] [blame] | 5197 | jumped = VG_MINIMAL_SETJMP(d3rd_jmpbuf); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5198 | if (jumped == 0) { |
| 5199 | /* try this ... */ |
| 5200 | new_dwarf3_reader_wrk( di, barf, |
sewardj | 5d616df | 2013-07-02 08:07:15 +0000 | [diff] [blame] | 5201 | escn_debug_info, escn_debug_types, |
| 5202 | escn_debug_abbv, escn_debug_line, |
| 5203 | escn_debug_str, escn_debug_ranges, |
| 5204 | escn_debug_loc, escn_debug_info_alt, |
| 5205 | escn_debug_abbv_alt, escn_debug_line_alt, |
| 5206 | escn_debug_str_alt ); |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5207 | d3rd_jmpbuf_valid = False; |
| 5208 | TRACE_D3("\n------ .debug_info reading was successful ------\n"); |
| 5209 | } else { |
| 5210 | /* It longjmp'd. */ |
| 5211 | d3rd_jmpbuf_valid = False; |
| 5212 | /* Can't longjump without giving some sort of reason. */ |
| 5213 | vg_assert(d3rd_jmpbuf_reason != NULL); |
| 5214 | |
| 5215 | TRACE_D3("\n------ .debug_info reading failed ------\n"); |
| 5216 | |
| 5217 | ML_(symerr)(di, True, d3rd_jmpbuf_reason); |
| 5218 | } |
| 5219 | |
| 5220 | d3rd_jmpbuf_valid = False; |
| 5221 | d3rd_jmpbuf_reason = NULL; |
| 5222 | } |
| 5223 | |
| 5224 | |
| 5225 | |
| 5226 | /* --- Unused code fragments which might be useful one day. --- */ |
| 5227 | |
| 5228 | #if 0 |
| 5229 | /* Read the arange tables */ |
| 5230 | TRACE_SYMTAB("\n"); |
| 5231 | TRACE_SYMTAB("\n------ The contents of .debug_arange ------\n"); |
| 5232 | init_Cursor( &aranges, debug_aranges_img, |
| 5233 | debug_aranges_sz, 0, barf, |
| 5234 | "Overrun whilst reading .debug_aranges section" ); |
| 5235 | while (True) { |
| 5236 | ULong len, d_i_offset; |
| 5237 | Bool is64; |
| 5238 | UShort version; |
| 5239 | UChar asize, segsize; |
| 5240 | |
| 5241 | if (is_at_end_Cursor( &aranges )) |
| 5242 | break; |
| 5243 | /* Read one arange thingy */ |
| 5244 | /* initial_length field */ |
| 5245 | len = get_Initial_Length( &is64, &aranges, |
| 5246 | "in .debug_aranges: invalid initial-length field" ); |
| 5247 | version = get_UShort( &aranges ); |
| 5248 | d_i_offset = get_Dwarfish_UWord( &aranges, is64 ); |
| 5249 | asize = get_UChar( &aranges ); |
| 5250 | segsize = get_UChar( &aranges ); |
| 5251 | TRACE_D3(" Length: %llu\n", len); |
| 5252 | TRACE_D3(" Version: %d\n", (Int)version); |
| 5253 | TRACE_D3(" Offset into .debug_info: %llx\n", d_i_offset); |
| 5254 | TRACE_D3(" Pointer Size: %d\n", (Int)asize); |
| 5255 | TRACE_D3(" Segment Size: %d\n", (Int)segsize); |
| 5256 | TRACE_D3("\n"); |
| 5257 | TRACE_D3(" Address Length\n"); |
| 5258 | |
| 5259 | while ((get_position_of_Cursor( &aranges ) % (2 * asize)) > 0) { |
| 5260 | (void)get_UChar( & aranges ); |
| 5261 | } |
| 5262 | while (True) { |
| 5263 | ULong address = get_Dwarfish_UWord( &aranges, asize==8 ); |
| 5264 | ULong length = get_Dwarfish_UWord( &aranges, asize==8 ); |
| 5265 | TRACE_D3(" 0x%016llx 0x%llx\n", address, length); |
| 5266 | if (address == 0 && length == 0) break; |
| 5267 | } |
| 5268 | } |
| 5269 | TRACE_SYMTAB("\n"); |
| 5270 | #endif |
| 5271 | |
sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 5272 | #endif // defined(VGO_linux) || defined(VGO_darwin) || defined(VGO_solaris) |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 5273 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5274 | /*--------------------------------------------------------------------*/ |
njn | 8b68b64 | 2009-06-24 00:37:09 +0000 | [diff] [blame] | 5275 | /*--- end ---*/ |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 5276 | /*--------------------------------------------------------------------*/ |