njn | c953984 | 2002-10-02 13:26:35 +0000 | [diff] [blame] | 1 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2 | /*--------------------------------------------------------------------*/ |
njn | c953984 | 2002-10-02 13:26:35 +0000 | [diff] [blame] | 3 | /*--- MemCheck: Maintain bitmaps of memory, tracking the ---*/ |
| 4 | /*--- accessibility (A) and validity (V) status of each byte. ---*/ |
njn25 | cac76cb | 2002-09-23 11:21:57 +0000 | [diff] [blame] | 5 | /*--- mc_main.c ---*/ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 6 | /*--------------------------------------------------------------------*/ |
| 7 | |
| 8 | /* |
nethercote | 137bc55 | 2003-11-14 17:47:54 +0000 | [diff] [blame] | 9 | This file is part of MemCheck, a heavyweight Valgrind tool for |
njn | c953984 | 2002-10-02 13:26:35 +0000 | [diff] [blame] | 10 | detecting memory errors. |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 11 | |
njn | 5361242 | 2005-03-12 16:22:54 +0000 | [diff] [blame] | 12 | Copyright (C) 2000-2005 Julian Seward |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 13 | jseward@acm.org |
| 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 | |
sewardj | c859fbf | 2005-04-22 21:10:28 +0000 | [diff] [blame] | 33 | /* TODO 22 Apr 05 |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 34 | |
sewardj | c859fbf | 2005-04-22 21:10:28 +0000 | [diff] [blame] | 35 | test whether it would be faster, for LOADV4, to check |
| 36 | only for 8-byte validity on the fast path |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 37 | */ |
| 38 | |
njn | c7561b9 | 2005-06-19 01:24:32 +0000 | [diff] [blame] | 39 | #include "pub_tool_basics.h" |
njn | 4802b38 | 2005-06-11 04:58:29 +0000 | [diff] [blame] | 40 | #include "pub_tool_aspacemgr.h" |
njn | c7561b9 | 2005-06-19 01:24:32 +0000 | [diff] [blame] | 41 | #include "pub_tool_errormgr.h" // For mac_shared.h |
| 42 | #include "pub_tool_execontext.h" // For mac_shared.h |
| 43 | #include "pub_tool_hashtable.h" // For mac_shared.h |
njn | 97405b2 | 2005-06-02 03:39:33 +0000 | [diff] [blame] | 44 | #include "pub_tool_libcbase.h" |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 45 | #include "pub_tool_libcassert.h" |
njn | 36a20fa | 2005-06-03 03:08:39 +0000 | [diff] [blame] | 46 | #include "pub_tool_libcprint.h" |
njn | f536bbb | 2005-06-13 04:21:38 +0000 | [diff] [blame] | 47 | #include "pub_tool_machine.h" |
njn | c7561b9 | 2005-06-19 01:24:32 +0000 | [diff] [blame] | 48 | #include "pub_tool_mallocfree.h" |
| 49 | #include "pub_tool_options.h" |
| 50 | #include "pub_tool_profile.h" // For mac_shared.h |
| 51 | #include "pub_tool_replacemalloc.h" |
| 52 | #include "pub_tool_tooliface.h" |
| 53 | #include "pub_tool_threadstate.h" |
| 54 | |
| 55 | #include "mc_include.h" |
| 56 | #include "memcheck.h" /* for client requests */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 57 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 58 | |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 59 | #define EXPECTED_TAKEN(cond) __builtin_expect((cond),1) |
| 60 | #define EXPECTED_NOT_TAKEN(cond) __builtin_expect((cond),0) |
| 61 | |
| 62 | /* Define to debug the mem audit system. Set to: |
| 63 | 0 no debugging, fast cases are used |
| 64 | 1 some sanity checking, fast cases are used |
| 65 | 2 max sanity checking, only slow cases are used |
| 66 | */ |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 67 | #define VG_DEBUG_MEMORY 0 |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 68 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 69 | #define DEBUG(fmt, args...) //VG_(printf)(fmt, ## args) |
| 70 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 71 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 72 | /*------------------------------------------------------------*/ |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 73 | /*--- Basic A/V bitmap representation. ---*/ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 74 | /*------------------------------------------------------------*/ |
| 75 | |
sewardj | c859fbf | 2005-04-22 21:10:28 +0000 | [diff] [blame] | 76 | /* TODO: fix this comment */ |
| 77 | //zz /* All reads and writes are checked against a memory map, which |
| 78 | //zz records the state of all memory in the process. The memory map is |
| 79 | //zz organised like this: |
| 80 | //zz |
| 81 | //zz The top 16 bits of an address are used to index into a top-level |
| 82 | //zz map table, containing 65536 entries. Each entry is a pointer to a |
| 83 | //zz second-level map, which records the accesibililty and validity |
| 84 | //zz permissions for the 65536 bytes indexed by the lower 16 bits of the |
| 85 | //zz address. Each byte is represented by nine bits, one indicating |
| 86 | //zz accessibility, the other eight validity. So each second-level map |
| 87 | //zz contains 73728 bytes. This two-level arrangement conveniently |
| 88 | //zz divides the 4G address space into 64k lumps, each size 64k bytes. |
| 89 | //zz |
| 90 | //zz All entries in the primary (top-level) map must point to a valid |
| 91 | //zz secondary (second-level) map. Since most of the 4G of address |
| 92 | //zz space will not be in use -- ie, not mapped at all -- there is a |
njn | 02bc4b8 | 2005-05-15 17:28:26 +0000 | [diff] [blame] | 93 | //zz distinguished secondary map, which indicates 'not addressible and |
sewardj | c859fbf | 2005-04-22 21:10:28 +0000 | [diff] [blame] | 94 | //zz not valid' writeable for all bytes. Entries in the primary map for |
| 95 | //zz which the entire 64k is not in use at all point at this |
| 96 | //zz distinguished map. |
| 97 | //zz |
| 98 | //zz There are actually 4 distinguished secondaries. These are used to |
| 99 | //zz represent a memory range which is either not addressable (validity |
| 100 | //zz doesn't matter), addressable+not valid, addressable+valid. |
| 101 | //zz |
| 102 | //zz [...] lots of stuff deleted due to out of date-ness |
| 103 | //zz |
| 104 | //zz As a final optimisation, the alignment and address checks for |
| 105 | //zz 4-byte loads and stores are combined in a neat way. The primary |
| 106 | //zz map is extended to have 262144 entries (2^18), rather than 2^16. |
| 107 | //zz The top 3/4 of these entries are permanently set to the |
| 108 | //zz distinguished secondary map. For a 4-byte load/store, the |
| 109 | //zz top-level map is indexed not with (addr >> 16) but instead f(addr), |
| 110 | //zz where |
| 111 | //zz |
| 112 | //zz f( XXXX XXXX XXXX XXXX ____ ____ ____ __YZ ) |
| 113 | //zz = ____ ____ ____ __YZ XXXX XXXX XXXX XXXX or |
| 114 | //zz = ____ ____ ____ __ZY XXXX XXXX XXXX XXXX |
| 115 | //zz |
| 116 | //zz ie the lowest two bits are placed above the 16 high address bits. |
| 117 | //zz If either of these two bits are nonzero, the address is misaligned; |
| 118 | //zz this will select a secondary map from the upper 3/4 of the primary |
| 119 | //zz map. Because this is always the distinguished secondary map, a |
| 120 | //zz (bogus) address check failure will result. The failure handling |
| 121 | //zz code can then figure out whether this is a genuine addr check |
| 122 | //zz failure or whether it is a possibly-legitimate access at a |
| 123 | //zz misaligned address. |
| 124 | //zz */ |
| 125 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 126 | /* --------------- Basic configuration --------------- */ |
sewardj | 9544807 | 2004-11-22 20:19:51 +0000 | [diff] [blame] | 127 | |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 128 | /* Only change this. N_PRIMARY_MAP *must* be a power of 2. */ |
sewardj | 21f7ff4 | 2005-04-28 10:32:02 +0000 | [diff] [blame] | 129 | |
sewardj | e4ccc01 | 2005-05-02 12:53:38 +0000 | [diff] [blame] | 130 | #if VG_WORDSIZE == 4 |
sewardj | 21f7ff4 | 2005-04-28 10:32:02 +0000 | [diff] [blame] | 131 | |
| 132 | /* cover the entire address space */ |
| 133 | # define N_PRIMARY_BITS 16 |
| 134 | |
| 135 | #else |
| 136 | |
| 137 | /* Just handle the first 16G fast and the rest via auxiliary |
| 138 | primaries. */ |
| 139 | # define N_PRIMARY_BITS 18 |
| 140 | |
| 141 | #endif |
| 142 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 143 | |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 144 | /* Do not change this. */ |
sewardj | e4ccc01 | 2005-05-02 12:53:38 +0000 | [diff] [blame] | 145 | #define N_PRIMARY_MAP ( ((UWord)1) << N_PRIMARY_BITS) |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 146 | |
| 147 | /* Do not change this. */ |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 148 | #define MAX_PRIMARY_ADDRESS (Addr)((((Addr)65536) * N_PRIMARY_MAP)-1) |
| 149 | |
| 150 | |
| 151 | /* --------------- Stats maps --------------- */ |
| 152 | |
| 153 | static Int n_secmaps_issued = 0; |
| 154 | static ULong n_auxmap_searches = 0; |
| 155 | static ULong n_auxmap_cmps = 0; |
| 156 | static Int n_sanity_cheap = 0; |
| 157 | static Int n_sanity_expensive = 0; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 158 | |
| 159 | |
| 160 | /* --------------- Secondary maps --------------- */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 161 | |
| 162 | typedef |
| 163 | struct { |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 164 | UChar abits[8192]; |
| 165 | UChar vbyte[65536]; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 166 | } |
| 167 | SecMap; |
| 168 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 169 | /* 3 distinguished secondary maps, one for no-access, one for |
| 170 | accessible but undefined, and one for accessible and defined. |
| 171 | Distinguished secondaries may never be modified. |
| 172 | */ |
| 173 | #define SM_DIST_NOACCESS 0 |
| 174 | #define SM_DIST_ACCESS_UNDEFINED 1 |
| 175 | #define SM_DIST_ACCESS_DEFINED 2 |
njn | b8dca86 | 2005-03-14 02:42:44 +0000 | [diff] [blame] | 176 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 177 | static SecMap sm_distinguished[3]; |
njn | b8dca86 | 2005-03-14 02:42:44 +0000 | [diff] [blame] | 178 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 179 | static inline Bool is_distinguished_sm ( SecMap* sm ) { |
| 180 | return sm >= &sm_distinguished[0] && sm <= &sm_distinguished[2]; |
| 181 | } |
njn | b8dca86 | 2005-03-14 02:42:44 +0000 | [diff] [blame] | 182 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 183 | /* dist_sm points to one of our three distinguished secondaries. Make |
| 184 | a copy of it so that we can write to it. |
| 185 | */ |
| 186 | static SecMap* copy_for_writing ( SecMap* dist_sm ) |
| 187 | { |
| 188 | SecMap* new_sm; |
| 189 | tl_assert(dist_sm == &sm_distinguished[0] |
| 190 | || dist_sm == &sm_distinguished[1] |
| 191 | || dist_sm == &sm_distinguished[2]); |
njn | b8dca86 | 2005-03-14 02:42:44 +0000 | [diff] [blame] | 192 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame^] | 193 | new_sm = VG_(am_shadow_alloc)(sizeof(SecMap)); |
| 194 | if (new_sm == NULL) |
| 195 | VG_(out_of_memory_NORETURN)( "memcheck:allocate new SecMap", |
| 196 | sizeof(SecMap) ); |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 197 | VG_(memcpy)(new_sm, dist_sm, sizeof(SecMap)); |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 198 | n_secmaps_issued++; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 199 | return new_sm; |
| 200 | } |
njn | b8dca86 | 2005-03-14 02:42:44 +0000 | [diff] [blame] | 201 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 202 | |
| 203 | /* --------------- Primary maps --------------- */ |
| 204 | |
| 205 | /* The main primary map. This covers some initial part of the address |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 206 | space, addresses 0 .. (N_PRIMARY_MAP << 16)-1. The rest of it is |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 207 | handled using the auxiliary primary map. |
| 208 | */ |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 209 | static SecMap* primary_map[N_PRIMARY_MAP]; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 210 | |
| 211 | |
| 212 | /* An entry in the auxiliary primary map. base must be a 64k-aligned |
| 213 | value, and sm points at the relevant secondary map. As with the |
| 214 | main primary map, the secondary may be either a real secondary, or |
| 215 | one of the three distinguished secondaries. |
| 216 | */ |
| 217 | typedef |
| 218 | struct { |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 219 | Addr base; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 220 | SecMap* sm; |
| 221 | } |
| 222 | AuxMapEnt; |
| 223 | |
| 224 | /* An expanding array of AuxMapEnts. */ |
sewardj | aba741d | 2005-06-09 13:56:07 +0000 | [diff] [blame] | 225 | #define N_AUXMAPS 20000 /* HACK */ |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 226 | static AuxMapEnt hacky_auxmaps[N_AUXMAPS]; |
| 227 | static Int auxmap_size = N_AUXMAPS; |
| 228 | static Int auxmap_used = 0; |
| 229 | static AuxMapEnt* auxmap = &hacky_auxmaps[0]; |
| 230 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 231 | |
| 232 | /* Find an entry in the auxiliary map. If an entry is found, move it |
| 233 | one step closer to the front of the array, then return its address. |
sewardj | 05fe85e | 2005-04-27 22:46:36 +0000 | [diff] [blame] | 234 | If an entry is not found, return NULL. Note carefully that |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 235 | because a each call potentially rearranges the entries, each call |
| 236 | to this function invalidates ALL AuxMapEnt*s previously obtained by |
| 237 | calling this fn. |
| 238 | */ |
sewardj | 05fe85e | 2005-04-27 22:46:36 +0000 | [diff] [blame] | 239 | static AuxMapEnt* maybe_find_in_auxmap ( Addr a ) |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 240 | { |
| 241 | UWord i; |
| 242 | tl_assert(a > MAX_PRIMARY_ADDRESS); |
| 243 | |
| 244 | a &= ~(Addr)0xFFFF; |
| 245 | |
| 246 | /* Search .. */ |
| 247 | n_auxmap_searches++; |
| 248 | for (i = 0; i < auxmap_used; i++) { |
| 249 | if (auxmap[i].base == a) |
| 250 | break; |
| 251 | } |
| 252 | n_auxmap_cmps += (ULong)(i+1); |
| 253 | |
| 254 | if (i < auxmap_used) { |
| 255 | /* Found it. Nudge it a bit closer to the front. */ |
| 256 | if (i > 0) { |
| 257 | AuxMapEnt tmp = auxmap[i-1]; |
| 258 | auxmap[i-1] = auxmap[i]; |
| 259 | auxmap[i] = tmp; |
| 260 | i--; |
| 261 | } |
| 262 | return &auxmap[i]; |
| 263 | } |
| 264 | |
sewardj | 05fe85e | 2005-04-27 22:46:36 +0000 | [diff] [blame] | 265 | return NULL; |
| 266 | } |
| 267 | |
| 268 | |
| 269 | /* Find an entry in the auxiliary map. If an entry is found, move it |
| 270 | one step closer to the front of the array, then return its address. |
| 271 | If an entry is not found, allocate one. Note carefully that |
| 272 | because a each call potentially rearranges the entries, each call |
| 273 | to this function invalidates ALL AuxMapEnt*s previously obtained by |
| 274 | calling this fn. |
| 275 | */ |
| 276 | static AuxMapEnt* find_or_alloc_in_auxmap ( Addr a ) |
| 277 | { |
| 278 | AuxMapEnt* am = maybe_find_in_auxmap(a); |
| 279 | if (am) |
| 280 | return am; |
| 281 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 282 | /* We didn't find it. Hmm. This is a new piece of address space. |
| 283 | We'll need to allocate a new AuxMap entry for it. */ |
| 284 | if (auxmap_used >= auxmap_size) { |
| 285 | tl_assert(auxmap_used == auxmap_size); |
| 286 | /* Out of auxmap entries. */ |
| 287 | tl_assert2(0, "failed to expand the auxmap table"); |
| 288 | } |
| 289 | |
| 290 | tl_assert(auxmap_used < auxmap_size); |
| 291 | |
| 292 | auxmap[auxmap_used].base = a & ~(Addr)0xFFFF; |
| 293 | auxmap[auxmap_used].sm = &sm_distinguished[SM_DIST_NOACCESS]; |
| 294 | |
| 295 | if (0) |
| 296 | VG_(printf)("new auxmap, base = 0x%llx\n", |
| 297 | (ULong)auxmap[auxmap_used].base ); |
| 298 | |
| 299 | auxmap_used++; |
| 300 | return &auxmap[auxmap_used-1]; |
| 301 | } |
| 302 | |
| 303 | |
| 304 | /* --------------- SecMap fundamentals --------------- */ |
| 305 | |
| 306 | /* Produce the secmap for 'a', either from the primary map or by |
| 307 | ensuring there is an entry for it in the aux primary map. The |
| 308 | secmap may be a distinguished one as the caller will only want to |
| 309 | be able to read it. |
| 310 | */ |
| 311 | static SecMap* get_secmap_readable ( Addr a ) |
| 312 | { |
| 313 | if (a <= MAX_PRIMARY_ADDRESS) { |
| 314 | UWord pm_off = a >> 16; |
| 315 | return primary_map[ pm_off ]; |
| 316 | } else { |
| 317 | AuxMapEnt* am = find_or_alloc_in_auxmap(a); |
| 318 | return am->sm; |
| 319 | } |
| 320 | } |
| 321 | |
sewardj | 05fe85e | 2005-04-27 22:46:36 +0000 | [diff] [blame] | 322 | /* If 'a' has a SecMap, produce it. Else produce NULL. But don't |
| 323 | allocate one if one doesn't already exist. This is used by the |
| 324 | leak checker. |
| 325 | */ |
| 326 | static SecMap* maybe_get_secmap_for ( Addr a ) |
| 327 | { |
| 328 | if (a <= MAX_PRIMARY_ADDRESS) { |
| 329 | UWord pm_off = a >> 16; |
| 330 | return primary_map[ pm_off ]; |
| 331 | } else { |
| 332 | AuxMapEnt* am = maybe_find_in_auxmap(a); |
| 333 | return am ? am->sm : NULL; |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | |
| 338 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 339 | /* Produce the secmap for 'a', either from the primary map or by |
| 340 | ensuring there is an entry for it in the aux primary map. The |
| 341 | secmap may not be a distinguished one, since the caller will want |
| 342 | to be able to write it. If it is a distinguished secondary, make a |
| 343 | writable copy of it, install it, and return the copy instead. (COW |
| 344 | semantics). |
| 345 | */ |
| 346 | static SecMap* get_secmap_writable ( Addr a ) |
| 347 | { |
| 348 | if (a <= MAX_PRIMARY_ADDRESS) { |
| 349 | UWord pm_off = a >> 16; |
| 350 | if (is_distinguished_sm(primary_map[ pm_off ])) |
| 351 | primary_map[pm_off] = copy_for_writing(primary_map[pm_off]); |
| 352 | return primary_map[pm_off]; |
| 353 | } else { |
| 354 | AuxMapEnt* am = find_or_alloc_in_auxmap(a); |
| 355 | if (is_distinguished_sm(am->sm)) |
| 356 | am->sm = copy_for_writing(am->sm); |
| 357 | return am->sm; |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | |
| 362 | /* --------------- Endianness helpers --------------- */ |
| 363 | |
| 364 | /* Returns the offset in memory of the byteno-th most significant byte |
| 365 | in a wordszB-sized word, given the specified endianness. */ |
| 366 | static inline UWord byte_offset_w ( UWord wordszB, Bool bigendian, |
| 367 | UWord byteno ) { |
| 368 | return bigendian ? (wordszB-1-byteno) : byteno; |
| 369 | } |
| 370 | |
| 371 | |
| 372 | /* --------------- Fundamental functions --------------- */ |
| 373 | |
| 374 | static |
| 375 | void get_abit_and_vbyte ( /*OUT*/UWord* abit, |
| 376 | /*OUT*/UWord* vbyte, |
| 377 | Addr a ) |
| 378 | { |
| 379 | SecMap* sm = get_secmap_readable(a); |
| 380 | *vbyte = 0xFF & sm->vbyte[a & 0xFFFF]; |
| 381 | *abit = read_bit_array(sm->abits, a & 0xFFFF); |
| 382 | } |
| 383 | |
| 384 | static |
| 385 | UWord get_abit ( Addr a ) |
| 386 | { |
| 387 | SecMap* sm = get_secmap_readable(a); |
| 388 | return read_bit_array(sm->abits, a & 0xFFFF); |
| 389 | } |
| 390 | |
| 391 | static |
| 392 | void set_abit_and_vbyte ( Addr a, UWord abit, UWord vbyte ) |
| 393 | { |
| 394 | SecMap* sm = get_secmap_writable(a); |
| 395 | sm->vbyte[a & 0xFFFF] = 0xFF & vbyte; |
| 396 | write_bit_array(sm->abits, a & 0xFFFF, abit); |
| 397 | } |
| 398 | |
| 399 | static |
| 400 | void set_vbyte ( Addr a, UWord vbyte ) |
| 401 | { |
| 402 | SecMap* sm = get_secmap_writable(a); |
| 403 | sm->vbyte[a & 0xFFFF] = 0xFF & vbyte; |
| 404 | } |
| 405 | |
| 406 | |
| 407 | /* --------------- Load/store slow cases. --------------- */ |
| 408 | |
| 409 | static |
| 410 | ULong mc_LOADVn_slow ( Addr a, SizeT szB, Bool bigendian ) |
| 411 | { |
| 412 | /* Make up a result V word, which contains the loaded data for |
sewardj | f3d57dd | 2005-04-22 20:23:27 +0000 | [diff] [blame] | 413 | valid addresses and Defined for invalid addresses. Iterate over |
| 414 | the bytes in the word, from the most significant down to the |
| 415 | least. */ |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 416 | ULong vw = VGM_WORD64_INVALID; |
| 417 | SizeT i = szB-1; |
| 418 | SizeT n_addrs_bad = 0; |
| 419 | Addr ai; |
| 420 | Bool aok; |
| 421 | UWord abit, vbyte; |
| 422 | |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 423 | PROF_EVENT(30, "mc_LOADVn_slow"); |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 424 | tl_assert(szB == 8 || szB == 4 || szB == 2 || szB == 1); |
| 425 | |
| 426 | while (True) { |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 427 | PROF_EVENT(31, "mc_LOADVn_slow(loop)"); |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 428 | ai = a+byte_offset_w(szB,bigendian,i); |
| 429 | get_abit_and_vbyte(&abit, &vbyte, ai); |
| 430 | aok = abit == VGM_BIT_VALID; |
| 431 | if (!aok) |
| 432 | n_addrs_bad++; |
| 433 | vw <<= 8; |
sewardj | f3d57dd | 2005-04-22 20:23:27 +0000 | [diff] [blame] | 434 | vw |= 0xFF & (aok ? vbyte : VGM_BYTE_VALID); |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 435 | if (i == 0) break; |
| 436 | i--; |
| 437 | } |
| 438 | |
| 439 | if (n_addrs_bad > 0) |
| 440 | MAC_(record_address_error)( VG_(get_running_tid)(), a, szB, False ); |
| 441 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 442 | return vw; |
| 443 | } |
| 444 | |
| 445 | |
| 446 | static |
| 447 | void mc_STOREVn_slow ( Addr a, SizeT szB, UWord vbytes, Bool bigendian ) |
| 448 | { |
| 449 | SizeT i; |
| 450 | SizeT n_addrs_bad = 0; |
| 451 | UWord abit; |
| 452 | Bool aok; |
| 453 | Addr ai; |
| 454 | |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 455 | PROF_EVENT(35, "mc_STOREVn_slow"); |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 456 | tl_assert(szB == 8 || szB == 4 || szB == 2 || szB == 1); |
| 457 | |
| 458 | /* Dump vbytes in memory, iterating from least to most significant |
| 459 | byte. At the same time establish addressibility of the |
| 460 | location. */ |
| 461 | for (i = 0; i < szB; i++) { |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 462 | PROF_EVENT(36, "mc_STOREVn_slow(loop)"); |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 463 | ai = a+byte_offset_w(szB,bigendian,i); |
| 464 | abit = get_abit(ai); |
| 465 | aok = abit == VGM_BIT_VALID; |
| 466 | if (!aok) |
| 467 | n_addrs_bad++; |
| 468 | set_vbyte(ai, vbytes & 0xFF ); |
| 469 | vbytes >>= 8; |
| 470 | } |
| 471 | |
| 472 | /* If an address error has happened, report it. */ |
| 473 | if (n_addrs_bad > 0) |
| 474 | MAC_(record_address_error)( VG_(get_running_tid)(), a, szB, True ); |
| 475 | } |
| 476 | |
| 477 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 478 | //zz /* Reading/writing of the bitmaps, for aligned word-sized accesses. */ |
| 479 | //zz |
| 480 | //zz static __inline__ UChar get_abits4_ALIGNED ( Addr a ) |
| 481 | //zz { |
| 482 | //zz SecMap* sm; |
| 483 | //zz UInt sm_off; |
| 484 | //zz UChar abits8; |
| 485 | //zz PROF_EVENT(24); |
| 486 | //zz # ifdef VG_DEBUG_MEMORY |
| 487 | //zz tl_assert(VG_IS_4_ALIGNED(a)); |
| 488 | //zz # endif |
| 489 | //zz sm = primary_map[PM_IDX(a)]; |
| 490 | //zz sm_off = SM_OFF(a); |
| 491 | //zz abits8 = sm->abits[sm_off >> 3]; |
| 492 | //zz abits8 >>= (a & 4 /* 100b */); /* a & 4 is either 0 or 4 */ |
| 493 | //zz abits8 &= 0x0F; |
| 494 | //zz return abits8; |
| 495 | //zz } |
| 496 | //zz |
| 497 | //zz static UInt __inline__ get_vbytes4_ALIGNED ( Addr a ) |
| 498 | //zz { |
| 499 | //zz SecMap* sm = primary_map[PM_IDX(a)]; |
| 500 | //zz UInt sm_off = SM_OFF(a); |
| 501 | //zz PROF_EVENT(25); |
| 502 | //zz # ifdef VG_DEBUG_MEMORY |
| 503 | //zz tl_assert(VG_IS_4_ALIGNED(a)); |
| 504 | //zz # endif |
| 505 | //zz return ((UInt*)(sm->vbyte))[sm_off >> 2]; |
| 506 | //zz } |
| 507 | //zz |
| 508 | //zz |
| 509 | //zz static void __inline__ set_vbytes4_ALIGNED ( Addr a, UInt vbytes ) |
| 510 | //zz { |
| 511 | //zz SecMap* sm; |
| 512 | //zz UInt sm_off; |
| 513 | //zz ENSURE_MAPPABLE(a, "set_vbytes4_ALIGNED"); |
| 514 | //zz sm = primary_map[PM_IDX(a)]; |
| 515 | //zz sm_off = SM_OFF(a); |
| 516 | //zz PROF_EVENT(23); |
| 517 | //zz # ifdef VG_DEBUG_MEMORY |
| 518 | //zz tl_assert(VG_IS_4_ALIGNED(a)); |
| 519 | //zz # endif |
| 520 | //zz ((UInt*)(sm->vbyte))[sm_off >> 2] = vbytes; |
| 521 | //zz } |
sewardj | ee07084 | 2003-07-05 17:53:55 +0000 | [diff] [blame] | 522 | |
| 523 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 524 | /*------------------------------------------------------------*/ |
| 525 | /*--- Setting permissions over address ranges. ---*/ |
| 526 | /*------------------------------------------------------------*/ |
| 527 | |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 528 | /* Given address 'a', find the place where the pointer to a's |
| 529 | secondary map lives. If a falls into the primary map, the returned |
| 530 | value points to one of the entries in primary_map[]. Otherwise, |
| 531 | the auxiliary primary map is searched for 'a', or an entry is |
| 532 | created for it; either way, the returned value points to the |
| 533 | relevant AuxMapEnt's .sm field. |
| 534 | |
| 535 | The point of this is to enable set_address_range_perms to assign |
| 536 | secondary maps in a uniform way, without worrying about whether a |
| 537 | given secondary map is pointed to from the main or auxiliary |
| 538 | primary map. |
| 539 | */ |
| 540 | |
| 541 | static SecMap** find_secmap_binder_for_addr ( Addr aA ) |
| 542 | { |
| 543 | if (aA > MAX_PRIMARY_ADDRESS) { |
| 544 | AuxMapEnt* am = find_or_alloc_in_auxmap(aA); |
| 545 | return &am->sm; |
| 546 | } else { |
| 547 | UWord a = (UWord)aA; |
| 548 | UWord sec_no = (UWord)(a >> 16); |
| 549 | # if VG_DEBUG_MEMORY >= 1 |
| 550 | tl_assert(sec_no < N_PRIMARY_MAP); |
| 551 | # endif |
| 552 | return &primary_map[sec_no]; |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | |
| 557 | static void set_address_range_perms ( Addr aA, SizeT len, |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 558 | UWord example_a_bit, |
| 559 | UWord example_v_bit ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 560 | { |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 561 | PROF_EVENT(150, "set_address_range_perms"); |
| 562 | |
| 563 | /* Check the permissions make sense. */ |
| 564 | tl_assert(example_a_bit == VGM_BIT_VALID |
| 565 | || example_a_bit == VGM_BIT_INVALID); |
| 566 | tl_assert(example_v_bit == VGM_BIT_VALID |
| 567 | || example_v_bit == VGM_BIT_INVALID); |
| 568 | if (example_a_bit == VGM_BIT_INVALID) |
| 569 | tl_assert(example_v_bit == VGM_BIT_INVALID); |
| 570 | |
| 571 | if (len == 0) |
| 572 | return; |
| 573 | |
sewardj | 1fa7d2c | 2005-06-13 18:22:17 +0000 | [diff] [blame] | 574 | if (VG_(clo_verbosity) > 0 && !VG_(clo_xml)) { |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 575 | if (len > 100 * 1000 * 1000) { |
| 576 | VG_(message)(Vg_UserMsg, |
| 577 | "Warning: set address range perms: " |
| 578 | "large range %u, a %d, v %d", |
| 579 | len, example_a_bit, example_v_bit ); |
| 580 | } |
| 581 | } |
| 582 | |
| 583 | UWord a = (UWord)aA; |
| 584 | |
| 585 | # if VG_DEBUG_MEMORY >= 2 |
| 586 | |
| 587 | /*------------------ debug-only case ------------------ */ |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 588 | SizeT i; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 589 | |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 590 | UWord example_vbyte = BIT_TO_BYTE(example_v_bit); |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 591 | |
| 592 | tl_assert(sizeof(SizeT) == sizeof(Addr)); |
| 593 | |
| 594 | if (0 && len >= 4096) |
| 595 | VG_(printf)("s_a_r_p(0x%llx, %d, %d,%d)\n", |
| 596 | (ULong)a, len, example_a_bit, example_v_bit); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 597 | |
| 598 | if (len == 0) |
| 599 | return; |
| 600 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 601 | for (i = 0; i < len; i++) { |
| 602 | set_abit_and_vbyte(a+i, example_a_bit, example_vbyte); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 603 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 604 | |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 605 | # else |
| 606 | |
| 607 | /*------------------ standard handling ------------------ */ |
| 608 | UWord vbits8, abits8, vbits32, v_off, a_off; |
| 609 | SecMap* sm; |
| 610 | SecMap** binder; |
| 611 | SecMap* example_dsm; |
| 612 | |
| 613 | /* Decide on the distinguished secondary that we might want |
| 614 | to use (part of the space-compression scheme). */ |
| 615 | if (example_a_bit == VGM_BIT_INVALID) { |
| 616 | example_dsm = &sm_distinguished[SM_DIST_NOACCESS]; |
| 617 | } else { |
| 618 | if (example_v_bit == VGM_BIT_VALID) { |
| 619 | example_dsm = &sm_distinguished[SM_DIST_ACCESS_DEFINED]; |
| 620 | } else { |
| 621 | example_dsm = &sm_distinguished[SM_DIST_ACCESS_UNDEFINED]; |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | /* Make various wider versions of the A/V values to use. */ |
| 626 | vbits8 = BIT_TO_BYTE(example_v_bit); |
| 627 | abits8 = BIT_TO_BYTE(example_a_bit); |
| 628 | vbits32 = (vbits8 << 24) | (vbits8 << 16) | (vbits8 << 8) | vbits8; |
| 629 | |
| 630 | /* Slowly do parts preceding 8-byte alignment. */ |
| 631 | while (True) { |
| 632 | if (len == 0) break; |
| 633 | PROF_EVENT(151, "set_address_range_perms-loop1-pre"); |
| 634 | if (VG_IS_8_ALIGNED(a)) break; |
| 635 | set_abit_and_vbyte( a, example_a_bit, vbits8 ); |
| 636 | a++; |
| 637 | len--; |
| 638 | } |
| 639 | |
| 640 | if (len == 0) |
| 641 | return; |
| 642 | |
| 643 | tl_assert(VG_IS_8_ALIGNED(a) && len > 0); |
| 644 | |
| 645 | /* Now go in steps of 8 bytes. */ |
| 646 | binder = find_secmap_binder_for_addr(a); |
| 647 | |
| 648 | while (True) { |
| 649 | |
| 650 | if (len < 8) break; |
| 651 | |
| 652 | PROF_EVENT(152, "set_address_range_perms-loop8"); |
| 653 | |
| 654 | if ((a & SECONDARY_MASK) == 0) { |
| 655 | /* we just traversed a primary map boundary, so update the |
| 656 | binder. */ |
| 657 | binder = find_secmap_binder_for_addr(a); |
| 658 | PROF_EVENT(153, "set_address_range_perms-update-binder"); |
| 659 | |
| 660 | /* Space-optimisation. If we are setting the entire |
| 661 | secondary map, just point this entry at one of our |
| 662 | distinguished secondaries. However, only do that if it |
| 663 | already points at a distinguished secondary, since doing |
| 664 | otherwise would leak the existing secondary. We could do |
| 665 | better and free up any pre-existing non-distinguished |
| 666 | secondary at this point, since we are guaranteed that each |
| 667 | non-dist secondary only has one pointer to it, and we have |
| 668 | that pointer right here. */ |
| 669 | if (len >= SECONDARY_SIZE && is_distinguished_sm(*binder)) { |
| 670 | PROF_EVENT(154, "set_address_range_perms-entire-secmap"); |
| 671 | *binder = example_dsm; |
| 672 | len -= SECONDARY_SIZE; |
| 673 | a += SECONDARY_SIZE; |
| 674 | continue; |
| 675 | } |
| 676 | } |
| 677 | |
| 678 | /* If the primary is already pointing to a distinguished map |
| 679 | with the same properties as we're trying to set, then leave |
| 680 | it that way. */ |
| 681 | if (*binder == example_dsm) { |
| 682 | a += 8; |
| 683 | len -= 8; |
| 684 | continue; |
| 685 | } |
| 686 | |
| 687 | /* Make sure it's OK to write the secondary. */ |
| 688 | if (is_distinguished_sm(*binder)) |
| 689 | *binder = copy_for_writing(*binder); |
| 690 | |
| 691 | sm = *binder; |
| 692 | v_off = a & 0xFFFF; |
| 693 | a_off = v_off >> 3; |
| 694 | sm->abits[a_off] = (UChar)abits8; |
| 695 | ((UInt*)(sm->vbyte))[(v_off >> 2) + 0] = (UInt)vbits32; |
| 696 | ((UInt*)(sm->vbyte))[(v_off >> 2) + 1] = (UInt)vbits32; |
| 697 | |
| 698 | a += 8; |
| 699 | len -= 8; |
| 700 | } |
| 701 | |
| 702 | if (len == 0) |
| 703 | return; |
| 704 | |
| 705 | tl_assert(VG_IS_8_ALIGNED(a) && len > 0 && len < 8); |
| 706 | |
| 707 | /* Finish the upper fragment. */ |
| 708 | while (True) { |
| 709 | if (len == 0) break; |
| 710 | PROF_EVENT(155, "set_address_range_perms-loop1-post"); |
| 711 | set_abit_and_vbyte ( a, example_a_bit, vbits8 ); |
| 712 | a++; |
| 713 | len--; |
| 714 | } |
| 715 | |
| 716 | # endif |
| 717 | } |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 718 | |
sewardj | c859fbf | 2005-04-22 21:10:28 +0000 | [diff] [blame] | 719 | |
| 720 | /* --- Set permissions for arbitrary address ranges --- */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 721 | |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 722 | static void mc_make_noaccess ( Addr a, SizeT len ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 723 | { |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 724 | PROF_EVENT(40, "mc_make_noaccess"); |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 725 | DEBUG("mc_make_noaccess(%p, %llu)\n", a, (ULong)len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 726 | set_address_range_perms ( a, len, VGM_BIT_INVALID, VGM_BIT_INVALID ); |
| 727 | } |
| 728 | |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 729 | static void mc_make_writable ( Addr a, SizeT len ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 730 | { |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 731 | PROF_EVENT(41, "mc_make_writable"); |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 732 | DEBUG("mc_make_writable(%p, %llu)\n", a, (ULong)len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 733 | set_address_range_perms ( a, len, VGM_BIT_VALID, VGM_BIT_INVALID ); |
| 734 | } |
| 735 | |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 736 | static void mc_make_readable ( Addr a, SizeT len ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 737 | { |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 738 | PROF_EVENT(42, "mc_make_readable"); |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 739 | DEBUG("mc_make_readable(%p, %llu)\n", a, (ULong)len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 740 | set_address_range_perms ( a, len, VGM_BIT_VALID, VGM_BIT_VALID ); |
| 741 | } |
| 742 | |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 743 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame^] | 744 | /* --- Block-copy permissions (needed for implementing realloc() and |
| 745 | sys_mremap). --- */ |
sewardj | c859fbf | 2005-04-22 21:10:28 +0000 | [diff] [blame] | 746 | |
| 747 | static void mc_copy_address_range_state ( Addr src, Addr dst, SizeT len ) |
| 748 | { |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame^] | 749 | SizeT i, j; |
sewardj | c859fbf | 2005-04-22 21:10:28 +0000 | [diff] [blame] | 750 | UWord abit, vbyte; |
| 751 | |
| 752 | DEBUG("mc_copy_address_range_state\n"); |
sewardj | c859fbf | 2005-04-22 21:10:28 +0000 | [diff] [blame] | 753 | PROF_EVENT(50, "mc_copy_address_range_state"); |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame^] | 754 | |
| 755 | if (len == 0) |
| 756 | return; |
| 757 | |
| 758 | if (src < dst) { |
| 759 | for (i = 0, j = len-1; i < len; i++, j--) { |
| 760 | PROF_EVENT(51, "mc_copy_address_range_state(loop)"); |
| 761 | get_abit_and_vbyte( &abit, &vbyte, src+j ); |
| 762 | set_abit_and_vbyte( dst+j, abit, vbyte ); |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | if (src > dst) { |
| 767 | for (i = 0; i < len; i++) { |
| 768 | PROF_EVENT(51, "mc_copy_address_range_state(loop)"); |
| 769 | get_abit_and_vbyte( &abit, &vbyte, src+i ); |
| 770 | set_abit_and_vbyte( dst+i, abit, vbyte ); |
| 771 | } |
sewardj | c859fbf | 2005-04-22 21:10:28 +0000 | [diff] [blame] | 772 | } |
| 773 | } |
| 774 | |
| 775 | |
| 776 | /* --- Fast case permission setters, for dealing with stacks. --- */ |
| 777 | |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 778 | static __inline__ |
sewardj | 5d28efc | 2005-04-21 22:16:29 +0000 | [diff] [blame] | 779 | void make_aligned_word32_writable ( Addr aA ) |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 780 | { |
sewardj | 5d28efc | 2005-04-21 22:16:29 +0000 | [diff] [blame] | 781 | PROF_EVENT(300, "make_aligned_word32_writable"); |
| 782 | |
| 783 | # if VG_DEBUG_MEMORY >= 2 |
| 784 | mc_make_writable(aA, 4); |
| 785 | # else |
| 786 | |
| 787 | if (EXPECTED_NOT_TAKEN(aA > MAX_PRIMARY_ADDRESS)) { |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 788 | PROF_EVENT(301, "make_aligned_word32_writable-slow1"); |
sewardj | 5d28efc | 2005-04-21 22:16:29 +0000 | [diff] [blame] | 789 | mc_make_writable(aA, 4); |
| 790 | return; |
| 791 | } |
| 792 | |
| 793 | UWord a = (UWord)aA; |
| 794 | UWord sec_no = (UWord)(a >> 16); |
| 795 | # if VG_DEBUG_MEMORY >= 1 |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 796 | tl_assert(sec_no < N_PRIMARY_MAP); |
sewardj | 5d28efc | 2005-04-21 22:16:29 +0000 | [diff] [blame] | 797 | # endif |
| 798 | |
| 799 | if (EXPECTED_NOT_TAKEN(is_distinguished_sm(primary_map[sec_no]))) |
| 800 | primary_map[sec_no] = copy_for_writing(primary_map[sec_no]); |
| 801 | |
| 802 | SecMap* sm = primary_map[sec_no]; |
| 803 | UWord v_off = a & 0xFFFF; |
| 804 | UWord a_off = v_off >> 3; |
| 805 | |
| 806 | /* Paint the new area as uninitialised. */ |
| 807 | ((UInt*)(sm->vbyte))[v_off >> 2] = VGM_WORD32_INVALID; |
| 808 | |
| 809 | UWord mask = 0x0F; |
| 810 | mask <<= (a & 4 /* 100b */); /* a & 4 is either 0 or 4 */ |
| 811 | /* mask now contains 1s where we wish to make address bits valid |
| 812 | (0s). */ |
| 813 | sm->abits[a_off] &= ~mask; |
| 814 | # endif |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 815 | } |
| 816 | |
sewardj | 5d28efc | 2005-04-21 22:16:29 +0000 | [diff] [blame] | 817 | |
| 818 | static __inline__ |
| 819 | void make_aligned_word32_noaccess ( Addr aA ) |
| 820 | { |
| 821 | PROF_EVENT(310, "make_aligned_word32_noaccess"); |
| 822 | |
| 823 | # if VG_DEBUG_MEMORY >= 2 |
| 824 | mc_make_noaccess(aA, 4); |
| 825 | # else |
| 826 | |
| 827 | if (EXPECTED_NOT_TAKEN(aA > MAX_PRIMARY_ADDRESS)) { |
| 828 | PROF_EVENT(311, "make_aligned_word32_noaccess-slow1"); |
| 829 | mc_make_noaccess(aA, 4); |
| 830 | return; |
| 831 | } |
| 832 | |
| 833 | UWord a = (UWord)aA; |
| 834 | UWord sec_no = (UWord)(a >> 16); |
| 835 | # if VG_DEBUG_MEMORY >= 1 |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 836 | tl_assert(sec_no < N_PRIMARY_MAP); |
sewardj | 5d28efc | 2005-04-21 22:16:29 +0000 | [diff] [blame] | 837 | # endif |
| 838 | |
| 839 | if (EXPECTED_NOT_TAKEN(is_distinguished_sm(primary_map[sec_no]))) |
| 840 | primary_map[sec_no] = copy_for_writing(primary_map[sec_no]); |
| 841 | |
| 842 | SecMap* sm = primary_map[sec_no]; |
| 843 | UWord v_off = a & 0xFFFF; |
| 844 | UWord a_off = v_off >> 3; |
| 845 | |
| 846 | /* Paint the abandoned data as uninitialised. Probably not |
| 847 | necessary, but still .. */ |
| 848 | ((UInt*)(sm->vbyte))[v_off >> 2] = VGM_WORD32_INVALID; |
| 849 | |
| 850 | UWord mask = 0x0F; |
| 851 | mask <<= (a & 4 /* 100b */); /* a & 4 is either 0 or 4 */ |
| 852 | /* mask now contains 1s where we wish to make address bits invalid |
| 853 | (1s). */ |
| 854 | sm->abits[a_off] |= mask; |
| 855 | # endif |
| 856 | } |
| 857 | |
| 858 | |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 859 | /* Nb: by "aligned" here we mean 8-byte aligned */ |
| 860 | static __inline__ |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 861 | void make_aligned_word64_writable ( Addr aA ) |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 862 | { |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 863 | PROF_EVENT(320, "make_aligned_word64_writable"); |
| 864 | |
| 865 | # if VG_DEBUG_MEMORY >= 2 |
| 866 | mc_make_writable(aA, 8); |
| 867 | # else |
| 868 | |
| 869 | if (EXPECTED_NOT_TAKEN(aA > MAX_PRIMARY_ADDRESS)) { |
| 870 | PROF_EVENT(321, "make_aligned_word64_writable-slow1"); |
| 871 | mc_make_writable(aA, 8); |
| 872 | return; |
| 873 | } |
| 874 | |
| 875 | UWord a = (UWord)aA; |
| 876 | UWord sec_no = (UWord)(a >> 16); |
| 877 | # if VG_DEBUG_MEMORY >= 1 |
| 878 | tl_assert(sec_no < N_PRIMARY_MAP); |
| 879 | # endif |
| 880 | |
| 881 | if (EXPECTED_NOT_TAKEN(is_distinguished_sm(primary_map[sec_no]))) |
| 882 | primary_map[sec_no] = copy_for_writing(primary_map[sec_no]); |
| 883 | |
| 884 | SecMap* sm = primary_map[sec_no]; |
| 885 | UWord v_off = a & 0xFFFF; |
| 886 | UWord a_off = v_off >> 3; |
| 887 | |
| 888 | /* Paint the new area as uninitialised. */ |
| 889 | ((ULong*)(sm->vbyte))[v_off >> 3] = VGM_WORD64_INVALID; |
| 890 | |
| 891 | /* Make the relevant area accessible. */ |
| 892 | sm->abits[a_off] = VGM_BYTE_VALID; |
| 893 | # endif |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 894 | } |
| 895 | |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 896 | |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 897 | static __inline__ |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 898 | void make_aligned_word64_noaccess ( Addr aA ) |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 899 | { |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 900 | PROF_EVENT(330, "make_aligned_word64_noaccess"); |
| 901 | |
| 902 | # if VG_DEBUG_MEMORY >= 2 |
| 903 | mc_make_noaccess(aA, 8); |
| 904 | # else |
| 905 | |
| 906 | if (EXPECTED_NOT_TAKEN(aA > MAX_PRIMARY_ADDRESS)) { |
| 907 | PROF_EVENT(331, "make_aligned_word64_noaccess-slow1"); |
| 908 | mc_make_noaccess(aA, 8); |
| 909 | return; |
| 910 | } |
| 911 | |
| 912 | UWord a = (UWord)aA; |
| 913 | UWord sec_no = (UWord)(a >> 16); |
| 914 | # if VG_DEBUG_MEMORY >= 1 |
| 915 | tl_assert(sec_no < N_PRIMARY_MAP); |
| 916 | # endif |
| 917 | |
| 918 | if (EXPECTED_NOT_TAKEN(is_distinguished_sm(primary_map[sec_no]))) |
| 919 | primary_map[sec_no] = copy_for_writing(primary_map[sec_no]); |
| 920 | |
| 921 | SecMap* sm = primary_map[sec_no]; |
| 922 | UWord v_off = a & 0xFFFF; |
| 923 | UWord a_off = v_off >> 3; |
| 924 | |
| 925 | /* Paint the abandoned data as uninitialised. Probably not |
| 926 | necessary, but still .. */ |
| 927 | ((ULong*)(sm->vbyte))[v_off >> 3] = VGM_WORD64_INVALID; |
| 928 | |
| 929 | /* Make the abandoned area inaccessible. */ |
| 930 | sm->abits[a_off] = VGM_BYTE_INVALID; |
| 931 | # endif |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 932 | } |
| 933 | |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 934 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 935 | /* The stack-pointer update handling functions */ |
| 936 | SP_UPDATE_HANDLERS ( make_aligned_word32_writable, |
| 937 | make_aligned_word32_noaccess, |
| 938 | make_aligned_word64_writable, |
| 939 | make_aligned_word64_noaccess, |
| 940 | mc_make_writable, |
| 941 | mc_make_noaccess |
| 942 | ); |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 943 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 944 | |
sewardj | 826ec49 | 2005-05-12 18:05:00 +0000 | [diff] [blame] | 945 | void MC_(helperc_MAKE_STACK_UNINIT) ( Addr base, UWord len ) |
| 946 | { |
| 947 | tl_assert(sizeof(UWord) == sizeof(SizeT)); |
sewardj | 2a3a1a7 | 2005-05-12 23:25:43 +0000 | [diff] [blame] | 948 | if (0) |
| 949 | VG_(printf)("helperc_MAKE_STACK_UNINIT %p %d\n", base, len ); |
| 950 | |
| 951 | # if 0 |
| 952 | /* Really slow version */ |
| 953 | mc_make_writable(base, len); |
| 954 | # endif |
| 955 | |
| 956 | # if 0 |
| 957 | /* Slow(ish) version, which is fairly easily seen to be correct. |
| 958 | */ |
| 959 | if (EXPECTED_TAKEN( VG_IS_8_ALIGNED(base) && len==128 )) { |
| 960 | make_aligned_word64_writable(base + 0); |
| 961 | make_aligned_word64_writable(base + 8); |
| 962 | make_aligned_word64_writable(base + 16); |
| 963 | make_aligned_word64_writable(base + 24); |
| 964 | |
| 965 | make_aligned_word64_writable(base + 32); |
| 966 | make_aligned_word64_writable(base + 40); |
| 967 | make_aligned_word64_writable(base + 48); |
| 968 | make_aligned_word64_writable(base + 56); |
| 969 | |
| 970 | make_aligned_word64_writable(base + 64); |
| 971 | make_aligned_word64_writable(base + 72); |
| 972 | make_aligned_word64_writable(base + 80); |
| 973 | make_aligned_word64_writable(base + 88); |
| 974 | |
| 975 | make_aligned_word64_writable(base + 96); |
| 976 | make_aligned_word64_writable(base + 104); |
| 977 | make_aligned_word64_writable(base + 112); |
| 978 | make_aligned_word64_writable(base + 120); |
| 979 | } else { |
| 980 | mc_make_writable(base, len); |
| 981 | } |
| 982 | # endif |
| 983 | |
| 984 | /* Idea is: go fast when |
| 985 | * 8-aligned and length is 128 |
| 986 | * the sm is available in the main primary map |
| 987 | * the address range falls entirely with a single |
| 988 | secondary map |
| 989 | * the SM is modifiable |
| 990 | If all those conditions hold, just update the V bits |
| 991 | by writing directly on the v-bit array. We don't care |
| 992 | about A bits; if the address range is marked invalid, |
| 993 | any attempt to access it will elicit an addressing error, |
| 994 | and that's good enough. |
| 995 | */ |
| 996 | if (EXPECTED_TAKEN( len == 128 |
| 997 | && VG_IS_8_ALIGNED(base) |
| 998 | )) { |
| 999 | /* Now we know the address range is suitably sized and |
| 1000 | aligned. */ |
| 1001 | UWord a_lo = (UWord)base; |
| 1002 | UWord a_hi = (UWord)(base + 127); |
| 1003 | UWord sec_lo = a_lo >> 16; |
| 1004 | UWord sec_hi = a_hi >> 16; |
| 1005 | |
| 1006 | if (EXPECTED_TAKEN( sec_lo == sec_hi |
| 1007 | && sec_lo <= N_PRIMARY_MAP |
| 1008 | )) { |
| 1009 | /* Now we know that the entire address range falls within a |
| 1010 | single secondary map, and that that secondary 'lives' in |
| 1011 | the main primary map. */ |
| 1012 | SecMap* sm = primary_map[sec_lo]; |
| 1013 | |
| 1014 | if (EXPECTED_TAKEN( !is_distinguished_sm(sm) )) { |
| 1015 | /* And finally, now we know that the secondary in question |
| 1016 | is modifiable. */ |
| 1017 | UWord v_off = a_lo & 0xFFFF; |
| 1018 | ULong* p = (ULong*)(&sm->vbyte[v_off]); |
| 1019 | p[ 0] = VGM_WORD64_INVALID; |
| 1020 | p[ 1] = VGM_WORD64_INVALID; |
| 1021 | p[ 2] = VGM_WORD64_INVALID; |
| 1022 | p[ 3] = VGM_WORD64_INVALID; |
| 1023 | p[ 4] = VGM_WORD64_INVALID; |
| 1024 | p[ 5] = VGM_WORD64_INVALID; |
| 1025 | p[ 6] = VGM_WORD64_INVALID; |
| 1026 | p[ 7] = VGM_WORD64_INVALID; |
| 1027 | p[ 8] = VGM_WORD64_INVALID; |
| 1028 | p[ 9] = VGM_WORD64_INVALID; |
| 1029 | p[10] = VGM_WORD64_INVALID; |
| 1030 | p[11] = VGM_WORD64_INVALID; |
| 1031 | p[12] = VGM_WORD64_INVALID; |
| 1032 | p[13] = VGM_WORD64_INVALID; |
| 1033 | p[14] = VGM_WORD64_INVALID; |
| 1034 | p[15] = VGM_WORD64_INVALID; |
| 1035 | return; |
| 1036 | } |
| 1037 | } |
| 1038 | } |
| 1039 | |
| 1040 | /* else fall into slow case */ |
sewardj | 826ec49 | 2005-05-12 18:05:00 +0000 | [diff] [blame] | 1041 | mc_make_writable(base, len); |
| 1042 | } |
| 1043 | |
| 1044 | |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1045 | /*------------------------------------------------------------*/ |
| 1046 | /*--- Checking memory ---*/ |
| 1047 | /*------------------------------------------------------------*/ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1048 | |
sewardj | e4ccc01 | 2005-05-02 12:53:38 +0000 | [diff] [blame] | 1049 | typedef |
| 1050 | enum { |
| 1051 | MC_Ok = 5, |
| 1052 | MC_AddrErr = 6, |
| 1053 | MC_ValueErr = 7 |
| 1054 | } |
| 1055 | MC_ReadResult; |
| 1056 | |
| 1057 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1058 | /* Check permissions for address range. If inadequate permissions |
| 1059 | exist, *bad_addr is set to the offending address, so the caller can |
| 1060 | know what it is. */ |
| 1061 | |
sewardj | ecf8e10 | 2003-07-12 12:11:39 +0000 | [diff] [blame] | 1062 | /* Returns True if [a .. a+len) is not addressible. Otherwise, |
| 1063 | returns False, and if bad_addr is non-NULL, sets *bad_addr to |
| 1064 | indicate the lowest failing address. Functions below are |
| 1065 | similar. */ |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1066 | static Bool mc_check_noaccess ( Addr a, SizeT len, Addr* bad_addr ) |
sewardj | ecf8e10 | 2003-07-12 12:11:39 +0000 | [diff] [blame] | 1067 | { |
nethercote | 451eae9 | 2004-11-02 13:06:32 +0000 | [diff] [blame] | 1068 | SizeT i; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1069 | UWord abit; |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1070 | PROF_EVENT(60, "mc_check_noaccess"); |
sewardj | ecf8e10 | 2003-07-12 12:11:39 +0000 | [diff] [blame] | 1071 | for (i = 0; i < len; i++) { |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1072 | PROF_EVENT(61, "mc_check_noaccess(loop)"); |
sewardj | ecf8e10 | 2003-07-12 12:11:39 +0000 | [diff] [blame] | 1073 | abit = get_abit(a); |
| 1074 | if (abit == VGM_BIT_VALID) { |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1075 | if (bad_addr != NULL) |
| 1076 | *bad_addr = a; |
sewardj | ecf8e10 | 2003-07-12 12:11:39 +0000 | [diff] [blame] | 1077 | return False; |
| 1078 | } |
| 1079 | a++; |
| 1080 | } |
| 1081 | return True; |
| 1082 | } |
| 1083 | |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1084 | static Bool mc_check_writable ( Addr a, SizeT len, Addr* bad_addr ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1085 | { |
nethercote | 451eae9 | 2004-11-02 13:06:32 +0000 | [diff] [blame] | 1086 | SizeT i; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1087 | UWord abit; |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1088 | PROF_EVENT(62, "mc_check_writable"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1089 | for (i = 0; i < len; i++) { |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1090 | PROF_EVENT(63, "mc_check_writable(loop)"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1091 | abit = get_abit(a); |
| 1092 | if (abit == VGM_BIT_INVALID) { |
| 1093 | if (bad_addr != NULL) *bad_addr = a; |
| 1094 | return False; |
| 1095 | } |
| 1096 | a++; |
| 1097 | } |
| 1098 | return True; |
| 1099 | } |
| 1100 | |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1101 | static MC_ReadResult mc_check_readable ( Addr a, SizeT len, Addr* bad_addr ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1102 | { |
nethercote | 451eae9 | 2004-11-02 13:06:32 +0000 | [diff] [blame] | 1103 | SizeT i; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1104 | UWord abit; |
| 1105 | UWord vbyte; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1106 | |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1107 | PROF_EVENT(64, "mc_check_readable"); |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1108 | DEBUG("mc_check_readable\n"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1109 | for (i = 0; i < len; i++) { |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1110 | PROF_EVENT(65, "mc_check_readable(loop)"); |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1111 | get_abit_and_vbyte(&abit, &vbyte, a); |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1112 | // Report addressability errors in preference to definedness errors |
| 1113 | // by checking the A bits first. |
| 1114 | if (abit != VGM_BIT_VALID) { |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1115 | if (bad_addr != NULL) |
| 1116 | *bad_addr = a; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1117 | return MC_AddrErr; |
| 1118 | } |
| 1119 | if (vbyte != VGM_BYTE_VALID) { |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1120 | if (bad_addr != NULL) |
| 1121 | *bad_addr = a; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1122 | return MC_ValueErr; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1123 | } |
| 1124 | a++; |
| 1125 | } |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1126 | return MC_Ok; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | |
| 1130 | /* Check a zero-terminated ascii string. Tricky -- don't want to |
| 1131 | examine the actual bytes, to find the end, until we're sure it is |
| 1132 | safe to do so. */ |
| 1133 | |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 1134 | static Bool mc_check_readable_asciiz ( Addr a, Addr* bad_addr ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1135 | { |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1136 | UWord abit; |
| 1137 | UWord vbyte; |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1138 | PROF_EVENT(66, "mc_check_readable_asciiz"); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1139 | DEBUG("mc_check_readable_asciiz\n"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1140 | while (True) { |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1141 | PROF_EVENT(67, "mc_check_readable_asciiz(loop)"); |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1142 | get_abit_and_vbyte(&abit, &vbyte, a); |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1143 | // As in mc_check_readable(), check A bits first |
| 1144 | if (abit != VGM_BIT_VALID) { |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1145 | if (bad_addr != NULL) |
| 1146 | *bad_addr = a; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1147 | return MC_AddrErr; |
| 1148 | } |
| 1149 | if (vbyte != VGM_BYTE_VALID) { |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1150 | if (bad_addr != NULL) |
| 1151 | *bad_addr = a; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1152 | return MC_ValueErr; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1153 | } |
| 1154 | /* Ok, a is safe to read. */ |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1155 | if (* ((UChar*)a) == 0) |
| 1156 | return MC_Ok; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1157 | a++; |
| 1158 | } |
| 1159 | } |
| 1160 | |
| 1161 | |
| 1162 | /*------------------------------------------------------------*/ |
| 1163 | /*--- Memory event handlers ---*/ |
| 1164 | /*------------------------------------------------------------*/ |
| 1165 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1166 | static |
njn | 7271864 | 2003-07-24 08:45:32 +0000 | [diff] [blame] | 1167 | void mc_check_is_writable ( CorePart part, ThreadId tid, Char* s, |
nethercote | 451eae9 | 2004-11-02 13:06:32 +0000 | [diff] [blame] | 1168 | Addr base, SizeT size ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1169 | { |
| 1170 | Bool ok; |
| 1171 | Addr bad_addr; |
| 1172 | |
| 1173 | VGP_PUSHCC(VgpCheckMem); |
| 1174 | |
| 1175 | /* VG_(message)(Vg_DebugMsg,"check is writable: %x .. %x", |
| 1176 | base,base+size-1); */ |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1177 | ok = mc_check_writable ( base, size, &bad_addr ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1178 | if (!ok) { |
| 1179 | switch (part) { |
| 1180 | case Vg_CoreSysCall: |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1181 | MAC_(record_param_error) ( tid, bad_addr, /*isReg*/False, |
| 1182 | /*isUnaddr*/True, s ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1183 | break; |
| 1184 | |
| 1185 | case Vg_CorePThread: |
| 1186 | case Vg_CoreSignal: |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1187 | MAC_(record_core_mem_error)( tid, /*isUnaddr*/True, s ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1188 | break; |
| 1189 | |
| 1190 | default: |
njn | 6799325 | 2004-11-22 18:02:32 +0000 | [diff] [blame] | 1191 | VG_(tool_panic)("mc_check_is_writable: unexpected CorePart"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1192 | } |
| 1193 | } |
| 1194 | |
| 1195 | VGP_POPCC(VgpCheckMem); |
| 1196 | } |
| 1197 | |
| 1198 | static |
njn | 7271864 | 2003-07-24 08:45:32 +0000 | [diff] [blame] | 1199 | void mc_check_is_readable ( CorePart part, ThreadId tid, Char* s, |
nethercote | 451eae9 | 2004-11-02 13:06:32 +0000 | [diff] [blame] | 1200 | Addr base, SizeT size ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1201 | { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1202 | Addr bad_addr; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1203 | MC_ReadResult res; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1204 | |
| 1205 | VGP_PUSHCC(VgpCheckMem); |
| 1206 | |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1207 | res = mc_check_readable ( base, size, &bad_addr ); |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame^] | 1208 | |
| 1209 | if (0) |
| 1210 | VG_(printf)("mc_check_is_readable(0x%x, %d, %s) -> %s\n", |
| 1211 | (UInt)base, (Int)size, s, res==MC_Ok ? "yes" : "no" ); |
| 1212 | |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1213 | if (MC_Ok != res) { |
| 1214 | Bool isUnaddr = ( MC_AddrErr == res ? True : False ); |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame^] | 1215 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1216 | switch (part) { |
| 1217 | case Vg_CoreSysCall: |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1218 | MAC_(record_param_error) ( tid, bad_addr, /*isReg*/False, |
| 1219 | isUnaddr, s ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1220 | break; |
| 1221 | |
| 1222 | case Vg_CorePThread: |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1223 | MAC_(record_core_mem_error)( tid, isUnaddr, s ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1224 | break; |
| 1225 | |
| 1226 | /* If we're being asked to jump to a silly address, record an error |
| 1227 | message before potentially crashing the entire system. */ |
| 1228 | case Vg_CoreTranslate: |
njn | 7271864 | 2003-07-24 08:45:32 +0000 | [diff] [blame] | 1229 | MAC_(record_jump_error)( tid, bad_addr ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1230 | break; |
| 1231 | |
| 1232 | default: |
njn | 6799325 | 2004-11-22 18:02:32 +0000 | [diff] [blame] | 1233 | VG_(tool_panic)("mc_check_is_readable: unexpected CorePart"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1234 | } |
| 1235 | } |
| 1236 | VGP_POPCC(VgpCheckMem); |
| 1237 | } |
| 1238 | |
| 1239 | static |
njn | 7271864 | 2003-07-24 08:45:32 +0000 | [diff] [blame] | 1240 | void mc_check_is_readable_asciiz ( CorePart part, ThreadId tid, |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1241 | Char* s, Addr str ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1242 | { |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1243 | MC_ReadResult res; |
njn | 5ab96ac | 2005-05-08 02:59:50 +0000 | [diff] [blame] | 1244 | Addr bad_addr = 0; // shut GCC up |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1245 | /* VG_(message)(Vg_DebugMsg,"check is readable asciiz: 0x%x",str); */ |
| 1246 | |
| 1247 | VGP_PUSHCC(VgpCheckMem); |
| 1248 | |
njn | ca82cc0 | 2004-11-22 17:18:48 +0000 | [diff] [blame] | 1249 | tl_assert(part == Vg_CoreSysCall); |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1250 | res = mc_check_readable_asciiz ( (Addr)str, &bad_addr ); |
| 1251 | if (MC_Ok != res) { |
| 1252 | Bool isUnaddr = ( MC_AddrErr == res ? True : False ); |
| 1253 | MAC_(record_param_error) ( tid, bad_addr, /*isReg*/False, isUnaddr, s ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1254 | } |
| 1255 | |
| 1256 | VGP_POPCC(VgpCheckMem); |
| 1257 | } |
| 1258 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1259 | static |
nethercote | 451eae9 | 2004-11-02 13:06:32 +0000 | [diff] [blame] | 1260 | void mc_new_mem_startup( Addr a, SizeT len, Bool rr, Bool ww, Bool xx ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1261 | { |
njn | 1f3a909 | 2002-10-04 09:22:30 +0000 | [diff] [blame] | 1262 | /* Ignore the permissions, just make it readable. Seems to work... */ |
nethercote | 451eae9 | 2004-11-02 13:06:32 +0000 | [diff] [blame] | 1263 | DEBUG("mc_new_mem_startup(%p, %llu, rr=%u, ww=%u, xx=%u)\n", |
| 1264 | a,(ULong)len,rr,ww,xx); |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1265 | mc_make_readable(a, len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1266 | } |
| 1267 | |
| 1268 | static |
nethercote | 451eae9 | 2004-11-02 13:06:32 +0000 | [diff] [blame] | 1269 | void mc_new_mem_heap ( Addr a, SizeT len, Bool is_inited ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1270 | { |
| 1271 | if (is_inited) { |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1272 | mc_make_readable(a, len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1273 | } else { |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1274 | mc_make_writable(a, len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1275 | } |
| 1276 | } |
| 1277 | |
| 1278 | static |
njn | b8dca86 | 2005-03-14 02:42:44 +0000 | [diff] [blame] | 1279 | void mc_new_mem_mmap ( Addr a, SizeT len, Bool rr, Bool ww, Bool xx ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1280 | { |
njn | b8dca86 | 2005-03-14 02:42:44 +0000 | [diff] [blame] | 1281 | mc_make_readable(a, len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1282 | } |
| 1283 | |
njn | cf45fd4 | 2004-11-24 16:30:22 +0000 | [diff] [blame] | 1284 | static |
| 1285 | void mc_post_mem_write(CorePart part, ThreadId tid, Addr a, SizeT len) |
| 1286 | { |
| 1287 | mc_make_readable(a, len); |
| 1288 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1289 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1290 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1291 | /*------------------------------------------------------------*/ |
njn | d304045 | 2003-05-19 15:04:06 +0000 | [diff] [blame] | 1292 | /*--- Register event handlers ---*/ |
| 1293 | /*------------------------------------------------------------*/ |
| 1294 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1295 | /* When some chunk of guest state is written, mark the corresponding |
| 1296 | shadow area as valid. This is used to initialise arbitrarily large |
sewardj | 2c27f70 | 2005-05-03 18:19:05 +0000 | [diff] [blame] | 1297 | chunks of guest state, hence the (somewhat arbitrary) 1024 limit. |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1298 | */ |
| 1299 | static void mc_post_reg_write ( CorePart part, ThreadId tid, |
| 1300 | OffT offset, SizeT size) |
njn | d304045 | 2003-05-19 15:04:06 +0000 | [diff] [blame] | 1301 | { |
sewardj | 6cf40ff | 2005-04-20 22:31:26 +0000 | [diff] [blame] | 1302 | UChar area[1024]; |
| 1303 | tl_assert(size <= 1024); |
njn | cf45fd4 | 2004-11-24 16:30:22 +0000 | [diff] [blame] | 1304 | VG_(memset)(area, VGM_BYTE_VALID, size); |
| 1305 | VG_(set_shadow_regs_area)( tid, offset, size, area ); |
njn | d304045 | 2003-05-19 15:04:06 +0000 | [diff] [blame] | 1306 | } |
| 1307 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1308 | static |
| 1309 | void mc_post_reg_write_clientcall ( ThreadId tid, |
| 1310 | OffT offset, SizeT size, |
| 1311 | Addr f) |
njn | d304045 | 2003-05-19 15:04:06 +0000 | [diff] [blame] | 1312 | { |
njn | cf45fd4 | 2004-11-24 16:30:22 +0000 | [diff] [blame] | 1313 | mc_post_reg_write(/*dummy*/0, tid, offset, size); |
njn | d304045 | 2003-05-19 15:04:06 +0000 | [diff] [blame] | 1314 | } |
| 1315 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1316 | /* Look at the definedness of the guest's shadow state for |
| 1317 | [offset, offset+len). If any part of that is undefined, record |
| 1318 | a parameter error. |
| 1319 | */ |
| 1320 | static void mc_pre_reg_read ( CorePart part, ThreadId tid, Char* s, |
| 1321 | OffT offset, SizeT size) |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1322 | { |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1323 | Int i; |
| 1324 | Bool bad; |
| 1325 | |
| 1326 | UChar area[16]; |
| 1327 | tl_assert(size <= 16); |
| 1328 | |
| 1329 | VG_(get_shadow_regs_area)( tid, offset, size, area ); |
| 1330 | |
| 1331 | bad = False; |
| 1332 | for (i = 0; i < size; i++) { |
| 1333 | if (area[i] != VGM_BYTE_VALID) { |
sewardj | 2c27f70 | 2005-05-03 18:19:05 +0000 | [diff] [blame] | 1334 | bad = True; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1335 | break; |
| 1336 | } |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1337 | } |
| 1338 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1339 | if (bad) |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 1340 | MAC_(record_param_error) ( tid, 0, /*isReg*/True, /*isUnaddr*/False, s ); |
| 1341 | } |
njn | d304045 | 2003-05-19 15:04:06 +0000 | [diff] [blame] | 1342 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1343 | |
sewardj | 6cf40ff | 2005-04-20 22:31:26 +0000 | [diff] [blame] | 1344 | /*------------------------------------------------------------*/ |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1345 | /*--- Printing errors ---*/ |
| 1346 | /*------------------------------------------------------------*/ |
| 1347 | |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 1348 | static void mc_pp_Error ( Error* err ) |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1349 | { |
| 1350 | MAC_Error* err_extra = VG_(get_error_extra)(err); |
| 1351 | |
sewardj | 71bc3cb | 2005-05-19 00:25:45 +0000 | [diff] [blame] | 1352 | HChar* xpre = VG_(clo_xml) ? " <what>" : ""; |
| 1353 | HChar* xpost = VG_(clo_xml) ? "</what>" : ""; |
| 1354 | |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1355 | switch (VG_(get_error_kind)(err)) { |
| 1356 | case CoreMemErr: { |
| 1357 | Char* s = ( err_extra->isUnaddr ? "unaddressable" : "uninitialised" ); |
sewardj | 71bc3cb | 2005-05-19 00:25:45 +0000 | [diff] [blame] | 1358 | if (VG_(clo_xml)) |
| 1359 | VG_(message)(Vg_UserMsg, " <kind>CoreMemError</kind>"); |
| 1360 | /* What the hell *is* a CoreMemError? jrs 2005-May-18 */ |
| 1361 | VG_(message)(Vg_UserMsg, "%s%s contains %s byte(s)%s", |
| 1362 | xpre, VG_(get_error_string)(err), s, xpost); |
| 1363 | |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1364 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 1365 | break; |
| 1366 | |
| 1367 | } |
| 1368 | |
| 1369 | case ValueErr: |
| 1370 | if (err_extra->size == 0) { |
sewardj | 71bc3cb | 2005-05-19 00:25:45 +0000 | [diff] [blame] | 1371 | if (VG_(clo_xml)) |
| 1372 | VG_(message)(Vg_UserMsg, " <kind>UninitCondition</kind>"); |
| 1373 | VG_(message)(Vg_UserMsg, "%sConditional jump or move depends" |
| 1374 | " on uninitialised value(s)%s", |
| 1375 | xpre, xpost); |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1376 | } else { |
sewardj | 71bc3cb | 2005-05-19 00:25:45 +0000 | [diff] [blame] | 1377 | if (VG_(clo_xml)) |
| 1378 | VG_(message)(Vg_UserMsg, " <kind>UninitValue</kind>"); |
| 1379 | VG_(message)(Vg_UserMsg, |
| 1380 | "%sUse of uninitialised value of size %d%s", |
| 1381 | xpre, err_extra->size, xpost); |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1382 | } |
| 1383 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 1384 | break; |
| 1385 | |
| 1386 | case ParamErr: { |
| 1387 | Bool isReg = ( Register == err_extra->addrinfo.akind ); |
| 1388 | Char* s1 = ( isReg ? "contains" : "points to" ); |
| 1389 | Char* s2 = ( err_extra->isUnaddr ? "unaddressable" : "uninitialised" ); |
| 1390 | if (isReg) tl_assert(!err_extra->isUnaddr); |
| 1391 | |
sewardj | 71bc3cb | 2005-05-19 00:25:45 +0000 | [diff] [blame] | 1392 | if (VG_(clo_xml)) |
| 1393 | VG_(message)(Vg_UserMsg, " <kind>SyscallParam</kind>"); |
| 1394 | VG_(message)(Vg_UserMsg, "%sSyscall param %s %s %s byte(s)%s", |
| 1395 | xpre, VG_(get_error_string)(err), s1, s2, xpost); |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1396 | |
| 1397 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 1398 | MAC_(pp_AddrInfo)(VG_(get_error_address)(err), &err_extra->addrinfo); |
| 1399 | break; |
| 1400 | } |
| 1401 | case UserErr: { |
| 1402 | Char* s = ( err_extra->isUnaddr ? "Unaddressable" : "Uninitialised" ); |
| 1403 | |
sewardj | 71bc3cb | 2005-05-19 00:25:45 +0000 | [diff] [blame] | 1404 | if (VG_(clo_xml)) |
| 1405 | VG_(message)(Vg_UserMsg, " <kind>ClientCheck</kind>"); |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1406 | VG_(message)(Vg_UserMsg, |
sewardj | 71bc3cb | 2005-05-19 00:25:45 +0000 | [diff] [blame] | 1407 | "%s%s byte(s) found during client check request%s", |
| 1408 | xpre, s, xpost); |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1409 | |
| 1410 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 1411 | MAC_(pp_AddrInfo)(VG_(get_error_address)(err), &err_extra->addrinfo); |
| 1412 | break; |
| 1413 | } |
| 1414 | default: |
| 1415 | MAC_(pp_shared_Error)(err); |
| 1416 | break; |
| 1417 | } |
| 1418 | } |
| 1419 | |
| 1420 | /*------------------------------------------------------------*/ |
| 1421 | /*--- Recording errors ---*/ |
| 1422 | /*------------------------------------------------------------*/ |
| 1423 | |
njn | 02bc4b8 | 2005-05-15 17:28:26 +0000 | [diff] [blame] | 1424 | /* Creates a copy of the 'extra' part, updates the copy with address info if |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1425 | necessary, and returns the copy. */ |
| 1426 | /* This one called from generated code and non-generated code. */ |
njn | 9636482 | 2005-05-08 19:04:53 +0000 | [diff] [blame] | 1427 | static void mc_record_value_error ( ThreadId tid, Int size ) |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1428 | { |
| 1429 | MAC_Error err_extra; |
| 1430 | |
| 1431 | MAC_(clear_MAC_Error)( &err_extra ); |
| 1432 | err_extra.size = size; |
| 1433 | err_extra.isUnaddr = False; |
| 1434 | VG_(maybe_record_error)( tid, ValueErr, /*addr*/0, /*s*/NULL, &err_extra ); |
| 1435 | } |
| 1436 | |
| 1437 | /* This called from non-generated code */ |
| 1438 | |
njn | 9636482 | 2005-05-08 19:04:53 +0000 | [diff] [blame] | 1439 | static void mc_record_user_error ( ThreadId tid, Addr a, Bool isWrite, |
| 1440 | Bool isUnaddr ) |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1441 | { |
| 1442 | MAC_Error err_extra; |
| 1443 | |
| 1444 | tl_assert(VG_INVALID_THREADID != tid); |
| 1445 | MAC_(clear_MAC_Error)( &err_extra ); |
| 1446 | err_extra.addrinfo.akind = Undescribed; |
| 1447 | err_extra.isUnaddr = isUnaddr; |
| 1448 | VG_(maybe_record_error)( tid, UserErr, a, /*s*/NULL, &err_extra ); |
| 1449 | } |
| 1450 | |
| 1451 | /*------------------------------------------------------------*/ |
| 1452 | /*--- Suppressions ---*/ |
| 1453 | /*------------------------------------------------------------*/ |
| 1454 | |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 1455 | static Bool mc_recognised_suppression ( Char* name, Supp* su ) |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1456 | { |
| 1457 | SuppKind skind; |
| 1458 | |
| 1459 | if (MAC_(shared_recognised_suppression)(name, su)) |
| 1460 | return True; |
| 1461 | |
| 1462 | /* Extra suppressions not used by Addrcheck */ |
| 1463 | else if (VG_STREQ(name, "Cond")) skind = Value0Supp; |
| 1464 | else if (VG_STREQ(name, "Value0")) skind = Value0Supp;/* backwards compat */ |
| 1465 | else if (VG_STREQ(name, "Value1")) skind = Value1Supp; |
| 1466 | else if (VG_STREQ(name, "Value2")) skind = Value2Supp; |
| 1467 | else if (VG_STREQ(name, "Value4")) skind = Value4Supp; |
| 1468 | else if (VG_STREQ(name, "Value8")) skind = Value8Supp; |
| 1469 | else if (VG_STREQ(name, "Value16")) skind = Value16Supp; |
| 1470 | else |
| 1471 | return False; |
| 1472 | |
| 1473 | VG_(set_supp_kind)(su, skind); |
| 1474 | return True; |
| 1475 | } |
| 1476 | |
| 1477 | /*------------------------------------------------------------*/ |
sewardj | c859fbf | 2005-04-22 21:10:28 +0000 | [diff] [blame] | 1478 | /*--- Functions called directly from generated code: ---*/ |
| 1479 | /*--- Load/store handlers. ---*/ |
sewardj | 6cf40ff | 2005-04-20 22:31:26 +0000 | [diff] [blame] | 1480 | /*------------------------------------------------------------*/ |
| 1481 | |
| 1482 | /* Types: LOADV4, LOADV2, LOADV1 are: |
| 1483 | UWord fn ( Addr a ) |
| 1484 | so they return 32-bits on 32-bit machines and 64-bits on |
| 1485 | 64-bit machines. Addr has the same size as a host word. |
| 1486 | |
| 1487 | LOADV8 is always ULong fn ( Addr a ) |
| 1488 | |
| 1489 | Similarly for STOREV1, STOREV2, STOREV4, the supplied vbits |
| 1490 | are a UWord, and for STOREV8 they are a ULong. |
| 1491 | */ |
| 1492 | |
sewardj | 9544807 | 2004-11-22 20:19:51 +0000 | [diff] [blame] | 1493 | /* ------------------------ Size = 8 ------------------------ */ |
| 1494 | |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1495 | #define MAKE_LOADV8(nAME,iS_BIGENDIAN) \ |
| 1496 | \ |
| 1497 | VG_REGPARM(1) \ |
| 1498 | ULong nAME ( Addr aA ) \ |
| 1499 | { \ |
| 1500 | PROF_EVENT(200, #nAME); \ |
| 1501 | \ |
| 1502 | if (VG_DEBUG_MEMORY >= 2) \ |
| 1503 | return mc_LOADVn_slow( aA, 8, iS_BIGENDIAN ); \ |
| 1504 | \ |
| 1505 | const UWord mask = ~((0x10000-8) | ((N_PRIMARY_MAP-1) << 16)); \ |
| 1506 | UWord a = (UWord)aA; \ |
| 1507 | \ |
| 1508 | /* If any part of 'a' indicated by the mask is 1, either */ \ |
| 1509 | /* 'a' is not naturally aligned, or 'a' exceeds the range */ \ |
| 1510 | /* covered by the primary map. Either way we defer to the */ \ |
| 1511 | /* slow-path case. */ \ |
| 1512 | if (EXPECTED_NOT_TAKEN(a & mask)) { \ |
| 1513 | PROF_EVENT(201, #nAME"-slow1"); \ |
| 1514 | return (UWord)mc_LOADVn_slow( aA, 8, iS_BIGENDIAN ); \ |
| 1515 | } \ |
| 1516 | \ |
| 1517 | UWord sec_no = (UWord)(a >> 16); \ |
| 1518 | \ |
| 1519 | if (VG_DEBUG_MEMORY >= 1) \ |
| 1520 | tl_assert(sec_no < N_PRIMARY_MAP); \ |
| 1521 | \ |
| 1522 | SecMap* sm = primary_map[sec_no]; \ |
| 1523 | UWord v_off = a & 0xFFFF; \ |
| 1524 | UWord a_off = v_off >> 3; \ |
| 1525 | UWord abits = (UWord)(sm->abits[a_off]); \ |
| 1526 | \ |
| 1527 | if (EXPECTED_TAKEN(abits == VGM_BYTE_VALID)) { \ |
| 1528 | /* Handle common case quickly: a is suitably aligned, */ \ |
| 1529 | /* is mapped, and is addressible. */ \ |
| 1530 | return ((ULong*)(sm->vbyte))[ v_off >> 3 ]; \ |
| 1531 | } else { \ |
| 1532 | /* Slow but general case. */ \ |
| 1533 | PROF_EVENT(202, #nAME"-slow2"); \ |
| 1534 | return mc_LOADVn_slow( a, 8, iS_BIGENDIAN ); \ |
| 1535 | } \ |
sewardj | f9d8161 | 2005-04-23 23:25:49 +0000 | [diff] [blame] | 1536 | } |
| 1537 | |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1538 | MAKE_LOADV8( MC_(helperc_LOADV8be), True /*bigendian*/ ); |
| 1539 | MAKE_LOADV8( MC_(helperc_LOADV8le), False/*littleendian*/ ); |
sewardj | f9d8161 | 2005-04-23 23:25:49 +0000 | [diff] [blame] | 1540 | |
sewardj | f9d8161 | 2005-04-23 23:25:49 +0000 | [diff] [blame] | 1541 | |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1542 | #define MAKE_STOREV8(nAME,iS_BIGENDIAN) \ |
| 1543 | \ |
| 1544 | VG_REGPARM(1) \ |
| 1545 | void nAME ( Addr aA, ULong vbytes ) \ |
| 1546 | { \ |
| 1547 | PROF_EVENT(210, #nAME); \ |
| 1548 | \ |
| 1549 | if (VG_DEBUG_MEMORY >= 2) \ |
| 1550 | mc_STOREVn_slow( aA, 8, vbytes, iS_BIGENDIAN ); \ |
| 1551 | \ |
| 1552 | const UWord mask = ~((0x10000-8) | ((N_PRIMARY_MAP-1) << 16)); \ |
| 1553 | UWord a = (UWord)aA; \ |
| 1554 | \ |
| 1555 | /* If any part of 'a' indicated by the mask is 1, either */ \ |
| 1556 | /* 'a' is not naturally aligned, or 'a' exceeds the range */ \ |
| 1557 | /* covered by the primary map. Either way we defer to the */ \ |
| 1558 | /* slow-path case. */ \ |
| 1559 | if (EXPECTED_NOT_TAKEN(a & mask)) { \ |
| 1560 | PROF_EVENT(211, #nAME"-slow1"); \ |
| 1561 | mc_STOREVn_slow( aA, 8, vbytes, iS_BIGENDIAN ); \ |
| 1562 | return; \ |
| 1563 | } \ |
| 1564 | \ |
| 1565 | UWord sec_no = (UWord)(a >> 16); \ |
| 1566 | \ |
| 1567 | if (VG_DEBUG_MEMORY >= 1) \ |
| 1568 | tl_assert(sec_no < N_PRIMARY_MAP); \ |
| 1569 | \ |
| 1570 | SecMap* sm = primary_map[sec_no]; \ |
| 1571 | UWord v_off = a & 0xFFFF; \ |
| 1572 | UWord a_off = v_off >> 3; \ |
| 1573 | UWord abits = (UWord)(sm->abits[a_off]); \ |
| 1574 | \ |
| 1575 | if (EXPECTED_TAKEN(!is_distinguished_sm(sm) \ |
| 1576 | && abits == VGM_BYTE_VALID)) { \ |
| 1577 | /* Handle common case quickly: a is suitably aligned, */ \ |
| 1578 | /* is mapped, and is addressible. */ \ |
| 1579 | ((ULong*)(sm->vbyte))[ v_off >> 3 ] = vbytes; \ |
| 1580 | } else { \ |
| 1581 | /* Slow but general case. */ \ |
| 1582 | PROF_EVENT(212, #nAME"-slow2"); \ |
| 1583 | mc_STOREVn_slow( aA, 8, vbytes, iS_BIGENDIAN ); \ |
| 1584 | } \ |
sewardj | f9d8161 | 2005-04-23 23:25:49 +0000 | [diff] [blame] | 1585 | } |
| 1586 | |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1587 | MAKE_STOREV8( MC_(helperc_STOREV8be), True /*bigendian*/ ); |
| 1588 | MAKE_STOREV8( MC_(helperc_STOREV8le), False/*littleendian*/ ); |
sewardj | 9544807 | 2004-11-22 20:19:51 +0000 | [diff] [blame] | 1589 | |
sewardj | 9544807 | 2004-11-22 20:19:51 +0000 | [diff] [blame] | 1590 | |
| 1591 | /* ------------------------ Size = 4 ------------------------ */ |
| 1592 | |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1593 | #define MAKE_LOADV4(nAME,iS_BIGENDIAN) \ |
| 1594 | \ |
| 1595 | VG_REGPARM(1) \ |
| 1596 | UWord nAME ( Addr aA ) \ |
| 1597 | { \ |
| 1598 | PROF_EVENT(220, #nAME); \ |
| 1599 | \ |
| 1600 | if (VG_DEBUG_MEMORY >= 2) \ |
| 1601 | return (UWord)mc_LOADVn_slow( aA, 4, iS_BIGENDIAN ); \ |
| 1602 | \ |
| 1603 | const UWord mask = ~((0x10000-4) | ((N_PRIMARY_MAP-1) << 16)); \ |
| 1604 | UWord a = (UWord)aA; \ |
| 1605 | \ |
| 1606 | /* If any part of 'a' indicated by the mask is 1, either */ \ |
| 1607 | /* 'a' is not naturally aligned, or 'a' exceeds the range */ \ |
| 1608 | /* covered by the primary map. Either way we defer to the */ \ |
| 1609 | /* slow-path case. */ \ |
| 1610 | if (EXPECTED_NOT_TAKEN(a & mask)) { \ |
| 1611 | PROF_EVENT(221, #nAME"-slow1"); \ |
| 1612 | return (UWord)mc_LOADVn_slow( aA, 4, iS_BIGENDIAN ); \ |
| 1613 | } \ |
| 1614 | \ |
| 1615 | UWord sec_no = (UWord)(a >> 16); \ |
| 1616 | \ |
| 1617 | if (VG_DEBUG_MEMORY >= 1) \ |
| 1618 | tl_assert(sec_no < N_PRIMARY_MAP); \ |
| 1619 | \ |
| 1620 | SecMap* sm = primary_map[sec_no]; \ |
| 1621 | UWord v_off = a & 0xFFFF; \ |
| 1622 | UWord a_off = v_off >> 3; \ |
| 1623 | UWord abits = (UWord)(sm->abits[a_off]); \ |
| 1624 | abits >>= (a & 4); \ |
| 1625 | abits &= 15; \ |
| 1626 | if (EXPECTED_TAKEN(abits == VGM_NIBBLE_VALID)) { \ |
| 1627 | /* Handle common case quickly: a is suitably aligned, */ \ |
| 1628 | /* is mapped, and is addressible. */ \ |
| 1629 | /* On a 32-bit platform, simply hoick the required 32 */ \ |
| 1630 | /* bits out of the vbyte array. On a 64-bit platform, */ \ |
| 1631 | /* also set the upper 32 bits to 1 ("undefined"), just */ \ |
| 1632 | /* in case. This almost certainly isn't necessary, */ \ |
| 1633 | /* but be paranoid. */ \ |
| 1634 | UWord ret = (UWord)0xFFFFFFFF00000000ULL; \ |
| 1635 | ret |= (UWord)( ((UInt*)(sm->vbyte))[ v_off >> 2 ] ); \ |
| 1636 | return ret; \ |
| 1637 | } else { \ |
| 1638 | /* Slow but general case. */ \ |
| 1639 | PROF_EVENT(222, #nAME"-slow2"); \ |
| 1640 | return (UWord)mc_LOADVn_slow( a, 4, iS_BIGENDIAN ); \ |
| 1641 | } \ |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1642 | } |
| 1643 | |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1644 | MAKE_LOADV4( MC_(helperc_LOADV4be), True /*bigendian*/ ); |
| 1645 | MAKE_LOADV4( MC_(helperc_LOADV4le), False/*littleendian*/ ); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1646 | |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1647 | |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1648 | #define MAKE_STOREV4(nAME,iS_BIGENDIAN) \ |
| 1649 | \ |
| 1650 | VG_REGPARM(2) \ |
| 1651 | void nAME ( Addr aA, UWord vbytes ) \ |
| 1652 | { \ |
| 1653 | PROF_EVENT(230, #nAME); \ |
| 1654 | \ |
| 1655 | if (VG_DEBUG_MEMORY >= 2) \ |
| 1656 | mc_STOREVn_slow( aA, 4, (ULong)vbytes, iS_BIGENDIAN ); \ |
| 1657 | \ |
| 1658 | const UWord mask = ~((0x10000-4) | ((N_PRIMARY_MAP-1) << 16)); \ |
| 1659 | UWord a = (UWord)aA; \ |
| 1660 | \ |
| 1661 | /* If any part of 'a' indicated by the mask is 1, either */ \ |
| 1662 | /* 'a' is not naturally aligned, or 'a' exceeds the range */ \ |
| 1663 | /* covered by the primary map. Either way we defer to the */ \ |
| 1664 | /* slow-path case. */ \ |
| 1665 | if (EXPECTED_NOT_TAKEN(a & mask)) { \ |
| 1666 | PROF_EVENT(231, #nAME"-slow1"); \ |
| 1667 | mc_STOREVn_slow( aA, 4, (ULong)vbytes, iS_BIGENDIAN ); \ |
| 1668 | return; \ |
| 1669 | } \ |
| 1670 | \ |
| 1671 | UWord sec_no = (UWord)(a >> 16); \ |
| 1672 | \ |
| 1673 | if (VG_DEBUG_MEMORY >= 1) \ |
| 1674 | tl_assert(sec_no < N_PRIMARY_MAP); \ |
| 1675 | \ |
| 1676 | SecMap* sm = primary_map[sec_no]; \ |
| 1677 | UWord v_off = a & 0xFFFF; \ |
| 1678 | UWord a_off = v_off >> 3; \ |
| 1679 | UWord abits = (UWord)(sm->abits[a_off]); \ |
| 1680 | abits >>= (a & 4); \ |
| 1681 | abits &= 15; \ |
| 1682 | if (EXPECTED_TAKEN(!is_distinguished_sm(sm) \ |
| 1683 | && abits == VGM_NIBBLE_VALID)) { \ |
| 1684 | /* Handle common case quickly: a is suitably aligned, */ \ |
| 1685 | /* is mapped, and is addressible. */ \ |
| 1686 | ((UInt*)(sm->vbyte))[ v_off >> 2 ] = (UInt)vbytes; \ |
| 1687 | } else { \ |
| 1688 | /* Slow but general case. */ \ |
| 1689 | PROF_EVENT(232, #nAME"-slow2"); \ |
| 1690 | mc_STOREVn_slow( aA, 4, (ULong)vbytes, iS_BIGENDIAN ); \ |
| 1691 | } \ |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1692 | } |
| 1693 | |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1694 | MAKE_STOREV4( MC_(helperc_STOREV4be), True /*bigendian*/ ); |
| 1695 | MAKE_STOREV4( MC_(helperc_STOREV4le), False/*littleendian*/ ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1696 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1697 | |
sewardj | 9544807 | 2004-11-22 20:19:51 +0000 | [diff] [blame] | 1698 | /* ------------------------ Size = 2 ------------------------ */ |
| 1699 | |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1700 | #define MAKE_LOADV2(nAME,iS_BIGENDIAN) \ |
| 1701 | \ |
| 1702 | VG_REGPARM(1) \ |
| 1703 | UWord nAME ( Addr aA ) \ |
| 1704 | { \ |
| 1705 | PROF_EVENT(240, #nAME); \ |
| 1706 | \ |
| 1707 | if (VG_DEBUG_MEMORY >= 2) \ |
| 1708 | return (UWord)mc_LOADVn_slow( aA, 2, iS_BIGENDIAN ); \ |
| 1709 | \ |
| 1710 | const UWord mask = ~((0x10000-2) | ((N_PRIMARY_MAP-1) << 16)); \ |
| 1711 | UWord a = (UWord)aA; \ |
| 1712 | \ |
| 1713 | /* If any part of 'a' indicated by the mask is 1, either */ \ |
| 1714 | /* 'a' is not naturally aligned, or 'a' exceeds the range */ \ |
| 1715 | /* covered by the primary map. Either way we defer to the */ \ |
| 1716 | /* slow-path case. */ \ |
| 1717 | if (EXPECTED_NOT_TAKEN(a & mask)) { \ |
| 1718 | PROF_EVENT(241, #nAME"-slow1"); \ |
| 1719 | return (UWord)mc_LOADVn_slow( aA, 2, iS_BIGENDIAN ); \ |
| 1720 | } \ |
| 1721 | \ |
| 1722 | UWord sec_no = (UWord)(a >> 16); \ |
| 1723 | \ |
| 1724 | if (VG_DEBUG_MEMORY >= 1) \ |
| 1725 | tl_assert(sec_no < N_PRIMARY_MAP); \ |
| 1726 | \ |
| 1727 | SecMap* sm = primary_map[sec_no]; \ |
| 1728 | UWord v_off = a & 0xFFFF; \ |
| 1729 | UWord a_off = v_off >> 3; \ |
| 1730 | UWord abits = (UWord)(sm->abits[a_off]); \ |
| 1731 | if (EXPECTED_TAKEN(abits == VGM_BYTE_VALID)) { \ |
| 1732 | /* Handle common case quickly: a is mapped, and the */ \ |
| 1733 | /* entire word32 it lives in is addressible. */ \ |
| 1734 | /* Set the upper 16/48 bits of the result to 1 */ \ |
| 1735 | /* ("undefined"), just in case. This almost certainly */ \ |
| 1736 | /* isn't necessary, but be paranoid. */ \ |
| 1737 | return (~(UWord)0xFFFF) \ |
| 1738 | | \ |
| 1739 | (UWord)( ((UShort*)(sm->vbyte))[ v_off >> 1 ] ); \ |
| 1740 | } else { \ |
| 1741 | /* Slow but general case. */ \ |
| 1742 | PROF_EVENT(242, #nAME"-slow2"); \ |
| 1743 | return (UWord)mc_LOADVn_slow( aA, 2, iS_BIGENDIAN ); \ |
| 1744 | } \ |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1745 | } |
| 1746 | |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1747 | MAKE_LOADV2( MC_(helperc_LOADV2be), True /*bigendian*/ ); |
| 1748 | MAKE_LOADV2( MC_(helperc_LOADV2le), False/*littleendian*/ ); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1749 | |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1750 | |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1751 | #define MAKE_STOREV2(nAME,iS_BIGENDIAN) \ |
| 1752 | \ |
| 1753 | VG_REGPARM(2) \ |
| 1754 | void nAME ( Addr aA, UWord vbytes ) \ |
| 1755 | { \ |
| 1756 | PROF_EVENT(250, #nAME); \ |
| 1757 | \ |
| 1758 | if (VG_DEBUG_MEMORY >= 2) \ |
| 1759 | mc_STOREVn_slow( aA, 2, (ULong)vbytes, iS_BIGENDIAN ); \ |
| 1760 | \ |
| 1761 | const UWord mask = ~((0x10000-2) | ((N_PRIMARY_MAP-1) << 16)); \ |
| 1762 | UWord a = (UWord)aA; \ |
| 1763 | \ |
| 1764 | /* If any part of 'a' indicated by the mask is 1, either */ \ |
| 1765 | /* 'a' is not naturally aligned, or 'a' exceeds the range */ \ |
| 1766 | /* covered by the primary map. Either way we defer to the */ \ |
| 1767 | /* slow-path case. */ \ |
| 1768 | if (EXPECTED_NOT_TAKEN(a & mask)) { \ |
| 1769 | PROF_EVENT(251, #nAME"-slow1"); \ |
| 1770 | mc_STOREVn_slow( aA, 2, (ULong)vbytes, iS_BIGENDIAN ); \ |
| 1771 | return; \ |
| 1772 | } \ |
| 1773 | \ |
| 1774 | UWord sec_no = (UWord)(a >> 16); \ |
| 1775 | \ |
| 1776 | if (VG_DEBUG_MEMORY >= 1) \ |
| 1777 | tl_assert(sec_no < N_PRIMARY_MAP); \ |
| 1778 | \ |
| 1779 | SecMap* sm = primary_map[sec_no]; \ |
| 1780 | UWord v_off = a & 0xFFFF; \ |
| 1781 | UWord a_off = v_off >> 3; \ |
| 1782 | UWord abits = (UWord)(sm->abits[a_off]); \ |
| 1783 | if (EXPECTED_TAKEN(!is_distinguished_sm(sm) \ |
| 1784 | && abits == VGM_BYTE_VALID)) { \ |
| 1785 | /* Handle common case quickly. */ \ |
| 1786 | ((UShort*)(sm->vbyte))[ v_off >> 1 ] = (UShort)vbytes; \ |
| 1787 | } else { \ |
| 1788 | /* Slow but general case. */ \ |
| 1789 | PROF_EVENT(252, #nAME"-slow2"); \ |
| 1790 | mc_STOREVn_slow( aA, 2, (ULong)vbytes, iS_BIGENDIAN ); \ |
| 1791 | } \ |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1792 | } |
| 1793 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1794 | |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1795 | MAKE_STOREV2( MC_(helperc_STOREV2be), True /*bigendian*/ ); |
| 1796 | MAKE_STOREV2( MC_(helperc_STOREV2le), False/*littleendian*/ ); |
sewardj | 5d28efc | 2005-04-21 22:16:29 +0000 | [diff] [blame] | 1797 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1798 | |
sewardj | 9544807 | 2004-11-22 20:19:51 +0000 | [diff] [blame] | 1799 | /* ------------------------ Size = 1 ------------------------ */ |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1800 | /* Note: endianness is irrelevant for size == 1 */ |
sewardj | 9544807 | 2004-11-22 20:19:51 +0000 | [diff] [blame] | 1801 | |
njn | af839f5 | 2005-06-23 03:27:57 +0000 | [diff] [blame] | 1802 | VG_REGPARM(1) |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1803 | UWord MC_(helperc_LOADV1) ( Addr aA ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1804 | { |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1805 | PROF_EVENT(260, "helperc_LOADV1"); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1806 | |
| 1807 | # if VG_DEBUG_MEMORY >= 2 |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1808 | return (UWord)mc_LOADVn_slow( aA, 1, False/*irrelevant*/ ); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1809 | # else |
| 1810 | |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 1811 | const UWord mask = ~((0x10000-1) | ((N_PRIMARY_MAP-1) << 16)); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1812 | UWord a = (UWord)aA; |
| 1813 | |
| 1814 | /* If any part of 'a' indicated by the mask is 1, it means 'a' |
| 1815 | exceeds the range covered by the primary map. In which case we |
| 1816 | defer to the slow-path case. */ |
| 1817 | if (EXPECTED_NOT_TAKEN(a & mask)) { |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1818 | PROF_EVENT(261, "helperc_LOADV1-slow1"); |
| 1819 | return (UWord)mc_LOADVn_slow( aA, 1, False/*irrelevant*/ ); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1820 | } |
| 1821 | |
| 1822 | UWord sec_no = (UWord)(a >> 16); |
| 1823 | |
| 1824 | # if VG_DEBUG_MEMORY >= 1 |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 1825 | tl_assert(sec_no < N_PRIMARY_MAP); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1826 | # endif |
| 1827 | |
| 1828 | SecMap* sm = primary_map[sec_no]; |
| 1829 | UWord v_off = a & 0xFFFF; |
| 1830 | UWord a_off = v_off >> 3; |
sewardj | 5d28efc | 2005-04-21 22:16:29 +0000 | [diff] [blame] | 1831 | UWord abits = (UWord)(sm->abits[a_off]); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1832 | if (EXPECTED_TAKEN(abits == VGM_BYTE_VALID)) { |
| 1833 | /* Handle common case quickly: a is mapped, and the entire |
| 1834 | word32 it lives in is addressible. */ |
sewardj | 5d28efc | 2005-04-21 22:16:29 +0000 | [diff] [blame] | 1835 | /* Set the upper 24/56 bits of the result to 1 ("undefined"), |
| 1836 | just in case. This almost certainly isn't necessary, but be |
| 1837 | paranoid. */ |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1838 | return (~(UWord)0xFF) |
| 1839 | | |
| 1840 | (UWord)( ((UChar*)(sm->vbyte))[ v_off ] ); |
| 1841 | } else { |
| 1842 | /* Slow but general case. */ |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1843 | PROF_EVENT(262, "helperc_LOADV1-slow2"); |
| 1844 | return (UWord)mc_LOADVn_slow( aA, 1, False/*irrelevant*/ ); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1845 | } |
| 1846 | # endif |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1847 | } |
| 1848 | |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1849 | |
njn | af839f5 | 2005-06-23 03:27:57 +0000 | [diff] [blame] | 1850 | VG_REGPARM(2) |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1851 | void MC_(helperc_STOREV1) ( Addr aA, UWord vbyte ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1852 | { |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1853 | PROF_EVENT(270, "helperc_STOREV1"); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1854 | |
| 1855 | # if VG_DEBUG_MEMORY >= 2 |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1856 | mc_STOREVn_slow( aA, 1, (ULong)vbyte, False/*irrelevant*/ ); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1857 | # else |
| 1858 | |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 1859 | const UWord mask = ~((0x10000-1) | ((N_PRIMARY_MAP-1) << 16)); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1860 | UWord a = (UWord)aA; |
| 1861 | /* If any part of 'a' indicated by the mask is 1, it means 'a' |
| 1862 | exceeds the range covered by the primary map. In which case we |
| 1863 | defer to the slow-path case. */ |
| 1864 | if (EXPECTED_NOT_TAKEN(a & mask)) { |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1865 | PROF_EVENT(271, "helperc_STOREV1-slow1"); |
| 1866 | mc_STOREVn_slow( aA, 1, (ULong)vbyte, False/*irrelevant*/ ); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1867 | return; |
| 1868 | } |
| 1869 | |
| 1870 | UWord sec_no = (UWord)(a >> 16); |
| 1871 | |
| 1872 | # if VG_DEBUG_MEMORY >= 1 |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 1873 | tl_assert(sec_no < N_PRIMARY_MAP); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1874 | # endif |
| 1875 | |
| 1876 | SecMap* sm = primary_map[sec_no]; |
| 1877 | UWord v_off = a & 0xFFFF; |
| 1878 | UWord a_off = v_off >> 3; |
sewardj | 5d28efc | 2005-04-21 22:16:29 +0000 | [diff] [blame] | 1879 | UWord abits = (UWord)(sm->abits[a_off]); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1880 | if (EXPECTED_TAKEN(!is_distinguished_sm(sm) |
| 1881 | && abits == VGM_BYTE_VALID)) { |
| 1882 | /* Handle common case quickly: a is mapped, the entire word32 it |
| 1883 | lives in is addressible. */ |
| 1884 | ((UChar*)(sm->vbyte))[ v_off ] = (UChar)vbyte; |
| 1885 | } else { |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 1886 | PROF_EVENT(272, "helperc_STOREV1-slow2"); |
| 1887 | mc_STOREVn_slow( aA, 1, (ULong)vbyte, False/*irrelevant*/ ); |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 1888 | } |
| 1889 | |
| 1890 | # endif |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1891 | } |
| 1892 | |
| 1893 | |
sewardj | c859fbf | 2005-04-22 21:10:28 +0000 | [diff] [blame] | 1894 | /*------------------------------------------------------------*/ |
| 1895 | /*--- Functions called directly from generated code: ---*/ |
| 1896 | /*--- Value-check failure handlers. ---*/ |
| 1897 | /*------------------------------------------------------------*/ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1898 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1899 | void MC_(helperc_value_check0_fail) ( void ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1900 | { |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1901 | mc_record_value_error ( VG_(get_running_tid)(), 0 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1902 | } |
| 1903 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1904 | void MC_(helperc_value_check1_fail) ( void ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1905 | { |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1906 | mc_record_value_error ( VG_(get_running_tid)(), 1 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1907 | } |
| 1908 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1909 | void MC_(helperc_value_check4_fail) ( void ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1910 | { |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1911 | mc_record_value_error ( VG_(get_running_tid)(), 4 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1912 | } |
| 1913 | |
sewardj | 11bcc4e | 2005-04-23 22:38:38 +0000 | [diff] [blame] | 1914 | void MC_(helperc_value_check8_fail) ( void ) |
| 1915 | { |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1916 | mc_record_value_error ( VG_(get_running_tid)(), 8 ); |
sewardj | 11bcc4e | 2005-04-23 22:38:38 +0000 | [diff] [blame] | 1917 | } |
| 1918 | |
njn | af839f5 | 2005-06-23 03:27:57 +0000 | [diff] [blame] | 1919 | VG_REGPARM(1) void MC_(helperc_complain_undef) ( HWord sz ) |
sewardj | 9544807 | 2004-11-22 20:19:51 +0000 | [diff] [blame] | 1920 | { |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1921 | mc_record_value_error ( VG_(get_running_tid)(), (Int)sz ); |
sewardj | 9544807 | 2004-11-22 20:19:51 +0000 | [diff] [blame] | 1922 | } |
| 1923 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1924 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1925 | //zz /*------------------------------------------------------------*/ |
| 1926 | //zz /*--- Metadata get/set functions, for client requests. ---*/ |
| 1927 | //zz /*------------------------------------------------------------*/ |
| 1928 | //zz |
| 1929 | //zz /* Copy Vbits for src into vbits. Returns: 1 == OK, 2 == alignment |
| 1930 | //zz error, 3 == addressing error. */ |
| 1931 | //zz static Int mc_get_or_set_vbits_for_client ( |
| 1932 | //zz ThreadId tid, |
| 1933 | //zz Addr dataV, |
| 1934 | //zz Addr vbitsV, |
| 1935 | //zz SizeT size, |
| 1936 | //zz Bool setting /* True <=> set vbits, False <=> get vbits */ |
| 1937 | //zz ) |
| 1938 | //zz { |
| 1939 | //zz Bool addressibleD = True; |
| 1940 | //zz Bool addressibleV = True; |
| 1941 | //zz UInt* data = (UInt*)dataV; |
| 1942 | //zz UInt* vbits = (UInt*)vbitsV; |
| 1943 | //zz SizeT szW = size / 4; /* sigh */ |
| 1944 | //zz SizeT i; |
| 1945 | //zz UInt* dataP = NULL; /* bogus init to keep gcc happy */ |
| 1946 | //zz UInt* vbitsP = NULL; /* ditto */ |
| 1947 | //zz |
| 1948 | //zz /* Check alignment of args. */ |
| 1949 | //zz if (!(VG_IS_4_ALIGNED(data) && VG_IS_4_ALIGNED(vbits))) |
| 1950 | //zz return 2; |
| 1951 | //zz if ((size & 3) != 0) |
| 1952 | //zz return 2; |
| 1953 | //zz |
| 1954 | //zz /* Check that arrays are addressible. */ |
| 1955 | //zz for (i = 0; i < szW; i++) { |
| 1956 | //zz dataP = &data[i]; |
| 1957 | //zz vbitsP = &vbits[i]; |
| 1958 | //zz if (get_abits4_ALIGNED((Addr)dataP) != VGM_NIBBLE_VALID) { |
| 1959 | //zz addressibleD = False; |
| 1960 | //zz break; |
| 1961 | //zz } |
| 1962 | //zz if (get_abits4_ALIGNED((Addr)vbitsP) != VGM_NIBBLE_VALID) { |
| 1963 | //zz addressibleV = False; |
| 1964 | //zz break; |
| 1965 | //zz } |
| 1966 | //zz } |
| 1967 | //zz if (!addressibleD) { |
| 1968 | //zz MAC_(record_address_error)( tid, (Addr)dataP, 4, |
| 1969 | //zz setting ? True : False ); |
| 1970 | //zz return 3; |
| 1971 | //zz } |
| 1972 | //zz if (!addressibleV) { |
| 1973 | //zz MAC_(record_address_error)( tid, (Addr)vbitsP, 4, |
| 1974 | //zz setting ? False : True ); |
| 1975 | //zz return 3; |
| 1976 | //zz } |
| 1977 | //zz |
| 1978 | //zz /* Do the copy */ |
| 1979 | //zz if (setting) { |
| 1980 | //zz /* setting */ |
| 1981 | //zz for (i = 0; i < szW; i++) { |
| 1982 | //zz if (get_vbytes4_ALIGNED( (Addr)&vbits[i] ) != VGM_WORD_VALID) |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 1983 | //zz mc_record_value_error(tid, 4); |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 1984 | //zz set_vbytes4_ALIGNED( (Addr)&data[i], vbits[i] ); |
| 1985 | //zz } |
| 1986 | //zz } else { |
| 1987 | //zz /* getting */ |
| 1988 | //zz for (i = 0; i < szW; i++) { |
| 1989 | //zz vbits[i] = get_vbytes4_ALIGNED( (Addr)&data[i] ); |
| 1990 | //zz set_vbytes4_ALIGNED( (Addr)&vbits[i], VGM_WORD_VALID ); |
| 1991 | //zz } |
| 1992 | //zz } |
| 1993 | //zz |
| 1994 | //zz return 1; |
| 1995 | //zz } |
sewardj | 05fe85e | 2005-04-27 22:46:36 +0000 | [diff] [blame] | 1996 | |
| 1997 | |
| 1998 | /*------------------------------------------------------------*/ |
| 1999 | /*--- Detecting leaked (unreachable) malloc'd blocks. ---*/ |
| 2000 | /*------------------------------------------------------------*/ |
| 2001 | |
| 2002 | /* For the memory leak detector, say whether an entire 64k chunk of |
| 2003 | address space is possibly in use, or not. If in doubt return |
| 2004 | True. |
| 2005 | */ |
| 2006 | static |
| 2007 | Bool mc_is_within_valid_secondary ( Addr a ) |
| 2008 | { |
| 2009 | SecMap* sm = maybe_get_secmap_for ( a ); |
| 2010 | if (sm == NULL || sm == &sm_distinguished[SM_DIST_NOACCESS]) { |
| 2011 | /* Definitely not in use. */ |
| 2012 | return False; |
| 2013 | } else { |
| 2014 | return True; |
| 2015 | } |
| 2016 | } |
| 2017 | |
| 2018 | |
| 2019 | /* For the memory leak detector, say whether or not a given word |
| 2020 | address is to be regarded as valid. */ |
| 2021 | static |
| 2022 | Bool mc_is_valid_aligned_word ( Addr a ) |
| 2023 | { |
| 2024 | tl_assert(sizeof(UWord) == 4 || sizeof(UWord) == 8); |
| 2025 | if (sizeof(UWord) == 4) { |
| 2026 | tl_assert(VG_IS_4_ALIGNED(a)); |
| 2027 | } else { |
| 2028 | tl_assert(VG_IS_8_ALIGNED(a)); |
| 2029 | } |
| 2030 | if (mc_check_readable( a, sizeof(UWord), NULL ) == MC_Ok) { |
| 2031 | return True; |
| 2032 | } else { |
| 2033 | return False; |
| 2034 | } |
| 2035 | } |
sewardj | a449568 | 2002-10-21 07:29:59 +0000 | [diff] [blame] | 2036 | |
| 2037 | |
nethercote | 996901a | 2004-08-03 13:29:09 +0000 | [diff] [blame] | 2038 | /* Leak detector for this tool. We don't actually do anything, merely |
sewardj | a449568 | 2002-10-21 07:29:59 +0000 | [diff] [blame] | 2039 | run the generic leak detector with suitable parameters for this |
nethercote | 996901a | 2004-08-03 13:29:09 +0000 | [diff] [blame] | 2040 | tool. */ |
njn | b8dca86 | 2005-03-14 02:42:44 +0000 | [diff] [blame] | 2041 | static void mc_detect_memory_leaks ( ThreadId tid, LeakCheckMode mode ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2042 | { |
sewardj | 05fe85e | 2005-04-27 22:46:36 +0000 | [diff] [blame] | 2043 | MAC_(do_detect_memory_leaks) ( |
| 2044 | tid, |
| 2045 | mode, |
| 2046 | mc_is_within_valid_secondary, |
| 2047 | mc_is_valid_aligned_word |
| 2048 | ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2049 | } |
| 2050 | |
| 2051 | |
sewardj | c859fbf | 2005-04-22 21:10:28 +0000 | [diff] [blame] | 2052 | /*------------------------------------------------------------*/ |
| 2053 | /*--- Initialisation ---*/ |
| 2054 | /*------------------------------------------------------------*/ |
| 2055 | |
| 2056 | static void init_shadow_memory ( void ) |
| 2057 | { |
| 2058 | Int i; |
| 2059 | SecMap* sm; |
| 2060 | |
| 2061 | /* Build the 3 distinguished secondaries */ |
| 2062 | tl_assert(VGM_BIT_INVALID == 1); |
| 2063 | tl_assert(VGM_BIT_VALID == 0); |
| 2064 | tl_assert(VGM_BYTE_INVALID == 0xFF); |
| 2065 | tl_assert(VGM_BYTE_VALID == 0); |
| 2066 | |
| 2067 | /* Set A invalid, V invalid. */ |
| 2068 | sm = &sm_distinguished[SM_DIST_NOACCESS]; |
| 2069 | for (i = 0; i < 65536; i++) |
| 2070 | sm->vbyte[i] = VGM_BYTE_INVALID; |
| 2071 | for (i = 0; i < 8192; i++) |
| 2072 | sm->abits[i] = VGM_BYTE_INVALID; |
| 2073 | |
| 2074 | /* Set A valid, V invalid. */ |
| 2075 | sm = &sm_distinguished[SM_DIST_ACCESS_UNDEFINED]; |
| 2076 | for (i = 0; i < 65536; i++) |
| 2077 | sm->vbyte[i] = VGM_BYTE_INVALID; |
| 2078 | for (i = 0; i < 8192; i++) |
| 2079 | sm->abits[i] = VGM_BYTE_VALID; |
| 2080 | |
| 2081 | /* Set A valid, V valid. */ |
| 2082 | sm = &sm_distinguished[SM_DIST_ACCESS_DEFINED]; |
| 2083 | for (i = 0; i < 65536; i++) |
| 2084 | sm->vbyte[i] = VGM_BYTE_VALID; |
| 2085 | for (i = 0; i < 8192; i++) |
| 2086 | sm->abits[i] = VGM_BYTE_VALID; |
| 2087 | |
| 2088 | /* Set up the primary map. */ |
| 2089 | /* These entries gradually get overwritten as the used address |
| 2090 | space expands. */ |
| 2091 | for (i = 0; i < N_PRIMARY_MAP; i++) |
| 2092 | primary_map[i] = &sm_distinguished[SM_DIST_NOACCESS]; |
| 2093 | |
| 2094 | /* auxmap_size = auxmap_used = 0; |
| 2095 | no ... these are statically initialised */ |
| 2096 | } |
| 2097 | |
| 2098 | |
| 2099 | /*------------------------------------------------------------*/ |
| 2100 | /*--- Sanity check machinery (permanently engaged) ---*/ |
| 2101 | /*------------------------------------------------------------*/ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2102 | |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 2103 | static Bool mc_cheap_sanity_check ( void ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2104 | { |
jseward | 9800fd3 | 2004-01-04 23:08:04 +0000 | [diff] [blame] | 2105 | /* nothing useful we can rapidly check */ |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2106 | n_sanity_cheap++; |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 2107 | PROF_EVENT(490, "cheap_sanity_check"); |
jseward | 9800fd3 | 2004-01-04 23:08:04 +0000 | [diff] [blame] | 2108 | return True; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2109 | } |
| 2110 | |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 2111 | static Bool mc_expensive_sanity_check ( void ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2112 | { |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2113 | Int i, n_secmaps_found; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2114 | SecMap* sm; |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2115 | Bool bad = False; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2116 | |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2117 | n_sanity_expensive++; |
sewardj | c1a2cda | 2005-04-21 17:34:00 +0000 | [diff] [blame] | 2118 | PROF_EVENT(491, "expensive_sanity_check"); |
| 2119 | |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2120 | /* Check that the 3 distinguished SMs are still as they should |
| 2121 | be. */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2122 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2123 | /* Check A invalid, V invalid. */ |
| 2124 | sm = &sm_distinguished[SM_DIST_NOACCESS]; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2125 | for (i = 0; i < 65536; i++) |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2126 | if (!(sm->vbyte[i] == VGM_BYTE_INVALID)) |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2127 | bad = True; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2128 | for (i = 0; i < 8192; i++) |
| 2129 | if (!(sm->abits[i] == VGM_BYTE_INVALID)) |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2130 | bad = True; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2131 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2132 | /* Check A valid, V invalid. */ |
| 2133 | sm = &sm_distinguished[SM_DIST_ACCESS_UNDEFINED]; |
| 2134 | for (i = 0; i < 65536; i++) |
| 2135 | if (!(sm->vbyte[i] == VGM_BYTE_INVALID)) |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2136 | bad = True; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2137 | for (i = 0; i < 8192; i++) |
| 2138 | if (!(sm->abits[i] == VGM_BYTE_VALID)) |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2139 | bad = True; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2140 | |
| 2141 | /* Check A valid, V valid. */ |
| 2142 | sm = &sm_distinguished[SM_DIST_ACCESS_DEFINED]; |
| 2143 | for (i = 0; i < 65536; i++) |
| 2144 | if (!(sm->vbyte[i] == VGM_BYTE_VALID)) |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2145 | bad = True; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2146 | for (i = 0; i < 8192; i++) |
| 2147 | if (!(sm->abits[i] == VGM_BYTE_VALID)) |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2148 | bad = True; |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2149 | |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2150 | if (bad) { |
| 2151 | VG_(printf)("memcheck expensive sanity: " |
| 2152 | "distinguished_secondaries have changed\n"); |
| 2153 | return False; |
| 2154 | } |
| 2155 | |
| 2156 | /* check nonsensical auxmap sizing */ |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2157 | if (auxmap_used > auxmap_size) |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2158 | bad = True; |
| 2159 | |
| 2160 | if (bad) { |
| 2161 | VG_(printf)("memcheck expensive sanity: " |
| 2162 | "nonsensical auxmap sizing\n"); |
| 2163 | return False; |
| 2164 | } |
| 2165 | |
| 2166 | /* check that the number of secmaps issued matches the number that |
| 2167 | are reachable (iow, no secmap leaks) */ |
| 2168 | n_secmaps_found = 0; |
| 2169 | for (i = 0; i < N_PRIMARY_MAP; i++) { |
| 2170 | if (primary_map[i] == NULL) { |
| 2171 | bad = True; |
| 2172 | } else { |
| 2173 | if (!is_distinguished_sm(primary_map[i])) |
| 2174 | n_secmaps_found++; |
| 2175 | } |
| 2176 | } |
| 2177 | |
| 2178 | for (i = 0; i < auxmap_used; i++) { |
| 2179 | if (auxmap[i].sm == NULL) { |
| 2180 | bad = True; |
| 2181 | } else { |
| 2182 | if (!is_distinguished_sm(auxmap[i].sm)) |
| 2183 | n_secmaps_found++; |
| 2184 | } |
| 2185 | } |
| 2186 | |
| 2187 | if (n_secmaps_found != n_secmaps_issued) |
| 2188 | bad = True; |
| 2189 | |
| 2190 | if (bad) { |
| 2191 | VG_(printf)("memcheck expensive sanity: " |
| 2192 | "apparent secmap leakage\n"); |
| 2193 | return False; |
| 2194 | } |
| 2195 | |
| 2196 | /* check that auxmap only covers address space that the primary |
| 2197 | doesn't */ |
| 2198 | |
| 2199 | for (i = 0; i < auxmap_used; i++) |
| 2200 | if (auxmap[i].base <= MAX_PRIMARY_ADDRESS) |
| 2201 | bad = True; |
| 2202 | |
| 2203 | if (bad) { |
| 2204 | VG_(printf)("memcheck expensive sanity: " |
| 2205 | "auxmap covers wrong address space\n"); |
| 2206 | return False; |
| 2207 | } |
| 2208 | |
| 2209 | /* there is only one pointer to each secmap (expensive) */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2210 | |
| 2211 | return True; |
| 2212 | } |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2213 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2214 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2215 | /*------------------------------------------------------------*/ |
njn | d304045 | 2003-05-19 15:04:06 +0000 | [diff] [blame] | 2216 | /*--- Command line args ---*/ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2217 | /*------------------------------------------------------------*/ |
| 2218 | |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 2219 | Bool MC_(clo_avoid_strlen_errors) = True; |
njn | 43c799e | 2003-04-08 00:08:52 +0000 | [diff] [blame] | 2220 | |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 2221 | static Bool mc_process_cmd_line_option(Char* arg) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2222 | { |
njn | 45270a2 | 2005-03-27 01:00:11 +0000 | [diff] [blame] | 2223 | VG_BOOL_CLO(arg, "--avoid-strlen-errors", MC_(clo_avoid_strlen_errors)) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2224 | else |
njn | 43c799e | 2003-04-08 00:08:52 +0000 | [diff] [blame] | 2225 | return MAC_(process_common_cmd_line_option)(arg); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2226 | |
| 2227 | return True; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2228 | } |
| 2229 | |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 2230 | static void mc_print_usage(void) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2231 | { |
njn | 3e88418 | 2003-04-15 13:03:23 +0000 | [diff] [blame] | 2232 | MAC_(print_common_usage)(); |
| 2233 | VG_(printf)( |
| 2234 | " --avoid-strlen-errors=no|yes suppress errs from inlined strlen [yes]\n" |
| 2235 | ); |
| 2236 | } |
| 2237 | |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 2238 | static void mc_print_debug_usage(void) |
njn | 3e88418 | 2003-04-15 13:03:23 +0000 | [diff] [blame] | 2239 | { |
| 2240 | MAC_(print_common_debug_usage)(); |
| 2241 | VG_(printf)( |
sewardj | 8ec2cfc | 2002-10-13 00:57:26 +0000 | [diff] [blame] | 2242 | " --cleanup=no|yes improve after instrumentation? [yes]\n" |
njn | 3e88418 | 2003-04-15 13:03:23 +0000 | [diff] [blame] | 2243 | ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2244 | } |
| 2245 | |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2246 | /*------------------------------------------------------------*/ |
| 2247 | /*--- Client requests ---*/ |
| 2248 | /*------------------------------------------------------------*/ |
| 2249 | |
| 2250 | /* Client block management: |
| 2251 | |
| 2252 | This is managed as an expanding array of client block descriptors. |
| 2253 | Indices of live descriptors are issued to the client, so it can ask |
| 2254 | to free them later. Therefore we cannot slide live entries down |
| 2255 | over dead ones. Instead we must use free/inuse flags and scan for |
| 2256 | an empty slot at allocation time. This in turn means allocation is |
| 2257 | relatively expensive, so we hope this does not happen too often. |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2258 | |
sewardj | edc75ab | 2005-03-15 23:30:32 +0000 | [diff] [blame] | 2259 | An unused block has start == size == 0 |
| 2260 | */ |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2261 | |
| 2262 | typedef |
| 2263 | struct { |
| 2264 | Addr start; |
| 2265 | SizeT size; |
| 2266 | ExeContext* where; |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 2267 | Char* desc; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2268 | } |
| 2269 | CGenBlock; |
| 2270 | |
| 2271 | /* This subsystem is self-initialising. */ |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2272 | static UInt cgb_size = 0; |
| 2273 | static UInt cgb_used = 0; |
| 2274 | static CGenBlock* cgbs = NULL; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2275 | |
| 2276 | /* Stats for this subsystem. */ |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2277 | static UInt cgb_used_MAX = 0; /* Max in use. */ |
| 2278 | static UInt cgb_allocs = 0; /* Number of allocs. */ |
| 2279 | static UInt cgb_discards = 0; /* Number of discards. */ |
| 2280 | static UInt cgb_search = 0; /* Number of searches. */ |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2281 | |
| 2282 | |
| 2283 | static |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2284 | Int alloc_client_block ( void ) |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2285 | { |
| 2286 | UInt i, sz_new; |
| 2287 | CGenBlock* cgbs_new; |
| 2288 | |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2289 | cgb_allocs++; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2290 | |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2291 | for (i = 0; i < cgb_used; i++) { |
| 2292 | cgb_search++; |
| 2293 | if (cgbs[i].start == 0 && cgbs[i].size == 0) |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2294 | return i; |
| 2295 | } |
| 2296 | |
| 2297 | /* Not found. Try to allocate one at the end. */ |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2298 | if (cgb_used < cgb_size) { |
| 2299 | cgb_used++; |
| 2300 | return cgb_used-1; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2301 | } |
| 2302 | |
| 2303 | /* Ok, we have to allocate a new one. */ |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2304 | tl_assert(cgb_used == cgb_size); |
| 2305 | sz_new = (cgbs == NULL) ? 10 : (2 * cgb_size); |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2306 | |
| 2307 | cgbs_new = VG_(malloc)( sz_new * sizeof(CGenBlock) ); |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2308 | for (i = 0; i < cgb_used; i++) |
| 2309 | cgbs_new[i] = cgbs[i]; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2310 | |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2311 | if (cgbs != NULL) |
| 2312 | VG_(free)( cgbs ); |
| 2313 | cgbs = cgbs_new; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2314 | |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2315 | cgb_size = sz_new; |
| 2316 | cgb_used++; |
| 2317 | if (cgb_used > cgb_used_MAX) |
| 2318 | cgb_used_MAX = cgb_used; |
| 2319 | return cgb_used-1; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2320 | } |
| 2321 | |
| 2322 | |
| 2323 | static void show_client_block_stats ( void ) |
| 2324 | { |
| 2325 | VG_(message)(Vg_DebugMsg, |
| 2326 | "general CBs: %d allocs, %d discards, %d maxinuse, %d search", |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2327 | cgb_allocs, cgb_discards, cgb_used_MAX, cgb_search |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2328 | ); |
| 2329 | } |
| 2330 | |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2331 | static Bool client_perm_maybe_describe( Addr a, AddrInfo* ai ) |
| 2332 | { |
| 2333 | UInt i; |
| 2334 | /* VG_(printf)("try to identify %d\n", a); */ |
| 2335 | |
| 2336 | /* Perhaps it's a general block ? */ |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2337 | for (i = 0; i < cgb_used; i++) { |
| 2338 | if (cgbs[i].start == 0 && cgbs[i].size == 0) |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2339 | continue; |
njn | 717cde5 | 2005-05-10 02:47:21 +0000 | [diff] [blame] | 2340 | // Use zero as the redzone for client blocks. |
| 2341 | if (VG_(addr_is_in_block)(a, cgbs[i].start, cgbs[i].size, 0)) { |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2342 | /* OK - maybe it's a mempool, too? */ |
njn | 1262727 | 2005-08-14 18:32:16 +0000 | [diff] [blame] | 2343 | MAC_Mempool* mp = VG_(HT_lookup)(MAC_(mempool_list), |
| 2344 | (UWord)cgbs[i].start); |
njn | 1d0cb0d | 2005-08-15 01:52:02 +0000 | [diff] [blame] | 2345 | if (mp != NULL) { |
| 2346 | if (mp->chunks != NULL) { |
| 2347 | MAC_Chunk* mc; |
njn | f66dbfc | 2005-08-15 01:54:05 +0000 | [diff] [blame] | 2348 | VG_(HT_ResetIter)(mp->chunks); |
| 2349 | while ( (mc = VG_(HT_Next)(mp->chunks)) ) { |
njn | 1d0cb0d | 2005-08-15 01:52:02 +0000 | [diff] [blame] | 2350 | if (VG_(addr_is_in_block)(a, mc->data, mc->size, |
| 2351 | MAC_MALLOC_REDZONE_SZB)) { |
| 2352 | ai->akind = UserG; |
| 2353 | ai->blksize = mc->size; |
| 2354 | ai->rwoffset = (Int)(a) - (Int)mc->data; |
| 2355 | ai->lastchange = mc->where; |
| 2356 | return True; |
| 2357 | } |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2358 | } |
| 2359 | } |
njn | 1d0cb0d | 2005-08-15 01:52:02 +0000 | [diff] [blame] | 2360 | ai->akind = Mempool; |
| 2361 | ai->blksize = cgbs[i].size; |
| 2362 | ai->rwoffset = (Int)(a) - (Int)(cgbs[i].start); |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2363 | ai->lastchange = cgbs[i].where; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2364 | return True; |
| 2365 | } |
njn | 1d0cb0d | 2005-08-15 01:52:02 +0000 | [diff] [blame] | 2366 | ai->akind = UserG; |
| 2367 | ai->blksize = cgbs[i].size; |
| 2368 | ai->rwoffset = (Int)(a) - (Int)(cgbs[i].start); |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2369 | ai->lastchange = cgbs[i].where; |
njn | 1d0cb0d | 2005-08-15 01:52:02 +0000 | [diff] [blame] | 2370 | ai->desc = cgbs[i].desc; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2371 | return True; |
| 2372 | } |
| 2373 | } |
| 2374 | return False; |
| 2375 | } |
| 2376 | |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 2377 | static Bool mc_handle_client_request ( ThreadId tid, UWord* arg, UWord* ret ) |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2378 | { |
| 2379 | Int i; |
| 2380 | Bool ok; |
| 2381 | Addr bad_addr; |
| 2382 | |
njn | fc26ff9 | 2004-11-22 19:12:49 +0000 | [diff] [blame] | 2383 | if (!VG_IS_TOOL_USERREQ('M','C',arg[0]) |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2384 | && VG_USERREQ__MALLOCLIKE_BLOCK != arg[0] |
| 2385 | && VG_USERREQ__FREELIKE_BLOCK != arg[0] |
| 2386 | && VG_USERREQ__CREATE_MEMPOOL != arg[0] |
| 2387 | && VG_USERREQ__DESTROY_MEMPOOL != arg[0] |
| 2388 | && VG_USERREQ__MEMPOOL_ALLOC != arg[0] |
| 2389 | && VG_USERREQ__MEMPOOL_FREE != arg[0]) |
| 2390 | return False; |
| 2391 | |
| 2392 | switch (arg[0]) { |
| 2393 | case VG_USERREQ__CHECK_WRITABLE: /* check writable */ |
| 2394 | ok = mc_check_writable ( arg[1], arg[2], &bad_addr ); |
| 2395 | if (!ok) |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 2396 | mc_record_user_error ( tid, bad_addr, /*isWrite*/True, |
| 2397 | /*isUnaddr*/True ); |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2398 | *ret = ok ? (UWord)NULL : bad_addr; |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 2399 | break; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2400 | |
| 2401 | case VG_USERREQ__CHECK_READABLE: { /* check readable */ |
| 2402 | MC_ReadResult res; |
| 2403 | res = mc_check_readable ( arg[1], arg[2], &bad_addr ); |
| 2404 | if (MC_AddrErr == res) |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 2405 | mc_record_user_error ( tid, bad_addr, /*isWrite*/False, |
| 2406 | /*isUnaddr*/True ); |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2407 | else if (MC_ValueErr == res) |
njn | 9e63cb6 | 2005-05-08 18:34:59 +0000 | [diff] [blame] | 2408 | mc_record_user_error ( tid, bad_addr, /*isWrite*/False, |
| 2409 | /*isUnaddr*/False ); |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2410 | *ret = ( res==MC_Ok ? (UWord)NULL : bad_addr ); |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 2411 | break; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2412 | } |
| 2413 | |
| 2414 | case VG_USERREQ__DO_LEAK_CHECK: |
njn | b8dca86 | 2005-03-14 02:42:44 +0000 | [diff] [blame] | 2415 | mc_detect_memory_leaks(tid, arg[1] ? LC_Summary : LC_Full); |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 2416 | *ret = 0; /* return value is meaningless */ |
| 2417 | break; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2418 | |
| 2419 | case VG_USERREQ__MAKE_NOACCESS: /* make no access */ |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2420 | mc_make_noaccess ( arg[1], arg[2] ); |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 2421 | *ret = -1; |
| 2422 | break; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2423 | |
| 2424 | case VG_USERREQ__MAKE_WRITABLE: /* make writable */ |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2425 | mc_make_writable ( arg[1], arg[2] ); |
sewardj | edc75ab | 2005-03-15 23:30:32 +0000 | [diff] [blame] | 2426 | *ret = -1; |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 2427 | break; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2428 | |
| 2429 | case VG_USERREQ__MAKE_READABLE: /* make readable */ |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2430 | mc_make_readable ( arg[1], arg[2] ); |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 2431 | *ret = -1; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2432 | break; |
| 2433 | |
sewardj | edc75ab | 2005-03-15 23:30:32 +0000 | [diff] [blame] | 2434 | case VG_USERREQ__CREATE_BLOCK: /* describe a block */ |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 2435 | if (arg[1] != 0 && arg[2] != 0) { |
| 2436 | i = alloc_client_block(); |
| 2437 | /* VG_(printf)("allocated %d %p\n", i, cgbs); */ |
| 2438 | cgbs[i].start = arg[1]; |
| 2439 | cgbs[i].size = arg[2]; |
| 2440 | cgbs[i].desc = VG_(strdup)((Char *)arg[3]); |
| 2441 | cgbs[i].where = VG_(record_ExeContext) ( tid ); |
sewardj | edc75ab | 2005-03-15 23:30:32 +0000 | [diff] [blame] | 2442 | |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 2443 | *ret = i; |
| 2444 | } else |
| 2445 | *ret = -1; |
| 2446 | break; |
sewardj | edc75ab | 2005-03-15 23:30:32 +0000 | [diff] [blame] | 2447 | |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2448 | case VG_USERREQ__DISCARD: /* discard */ |
njn | 695c16e | 2005-03-27 03:40:28 +0000 | [diff] [blame] | 2449 | if (cgbs == NULL |
| 2450 | || arg[2] >= cgb_used || |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 2451 | (cgbs[arg[2]].start == 0 && cgbs[arg[2]].size == 0)) { |
sewardj | edc75ab | 2005-03-15 23:30:32 +0000 | [diff] [blame] | 2452 | *ret = 1; |
sewardj | 8cf88b7 | 2005-07-08 01:29:33 +0000 | [diff] [blame] | 2453 | } else { |
| 2454 | tl_assert(arg[2] >= 0 && arg[2] < cgb_used); |
| 2455 | cgbs[arg[2]].start = cgbs[arg[2]].size = 0; |
| 2456 | VG_(free)(cgbs[arg[2]].desc); |
| 2457 | cgb_discards++; |
| 2458 | *ret = 0; |
| 2459 | } |
| 2460 | break; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2461 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2462 | //zz case VG_USERREQ__GET_VBITS: |
| 2463 | //zz /* Returns: 1 == OK, 2 == alignment error, 3 == addressing |
| 2464 | //zz error. */ |
| 2465 | //zz /* VG_(printf)("get_vbits %p %p %d\n", arg[1], arg[2], arg[3] ); */ |
| 2466 | //zz *ret = mc_get_or_set_vbits_for_client |
| 2467 | //zz ( tid, arg[1], arg[2], arg[3], False /* get them */ ); |
| 2468 | //zz break; |
| 2469 | //zz |
| 2470 | //zz case VG_USERREQ__SET_VBITS: |
| 2471 | //zz /* Returns: 1 == OK, 2 == alignment error, 3 == addressing |
| 2472 | //zz error. */ |
| 2473 | //zz /* VG_(printf)("set_vbits %p %p %d\n", arg[1], arg[2], arg[3] ); */ |
| 2474 | //zz *ret = mc_get_or_set_vbits_for_client |
| 2475 | //zz ( tid, arg[1], arg[2], arg[3], True /* set them */ ); |
| 2476 | //zz break; |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2477 | |
| 2478 | default: |
| 2479 | if (MAC_(handle_common_client_requests)(tid, arg, ret )) { |
| 2480 | return True; |
| 2481 | } else { |
| 2482 | VG_(message)(Vg_UserMsg, |
| 2483 | "Warning: unknown memcheck client request code %llx", |
| 2484 | (ULong)arg[0]); |
| 2485 | return False; |
| 2486 | } |
| 2487 | } |
| 2488 | return True; |
| 2489 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2490 | |
| 2491 | /*------------------------------------------------------------*/ |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 2492 | /*--- Setup and finalisation ---*/ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2493 | /*------------------------------------------------------------*/ |
| 2494 | |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 2495 | static void mc_post_clo_init ( void ) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 2496 | { |
sewardj | 71bc3cb | 2005-05-19 00:25:45 +0000 | [diff] [blame] | 2497 | /* If we've been asked to emit XML, mash around various other |
| 2498 | options so as to constrain the output somewhat. */ |
| 2499 | if (VG_(clo_xml)) { |
| 2500 | /* Extract as much info as possible from the leak checker. */ |
sewardj | 09890d8 | 2005-05-20 02:45:15 +0000 | [diff] [blame] | 2501 | /* MAC_(clo_show_reachable) = True; */ |
sewardj | 71bc3cb | 2005-05-19 00:25:45 +0000 | [diff] [blame] | 2502 | MAC_(clo_leak_check) = LC_Full; |
| 2503 | } |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 2504 | } |
| 2505 | |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 2506 | static void mc_fini ( Int exitcode ) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 2507 | { |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2508 | MAC_(common_fini)( mc_detect_memory_leaks ); |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2509 | |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2510 | Int i, n_accessible_dist; |
| 2511 | SecMap* sm; |
| 2512 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2513 | if (VG_(clo_verbosity) > 1) { |
| 2514 | VG_(message)(Vg_DebugMsg, |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2515 | " memcheck: sanity checks: %d cheap, %d expensive", |
| 2516 | n_sanity_cheap, n_sanity_expensive ); |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2517 | VG_(message)(Vg_DebugMsg, |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2518 | " memcheck: auxmaps: %d auxmap entries (%dk, %dM) in use", |
| 2519 | auxmap_used, |
| 2520 | auxmap_used * 64, |
| 2521 | auxmap_used / 16 ); |
| 2522 | VG_(message)(Vg_DebugMsg, |
| 2523 | " memcheck: auxmaps: %lld searches, %lld comparisons", |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2524 | n_auxmap_searches, n_auxmap_cmps ); |
sewardj | 23eb2fd | 2005-04-22 16:29:19 +0000 | [diff] [blame] | 2525 | VG_(message)(Vg_DebugMsg, |
| 2526 | " memcheck: secondaries: %d issued (%dk, %dM)", |
| 2527 | n_secmaps_issued, |
| 2528 | n_secmaps_issued * 64, |
| 2529 | n_secmaps_issued / 16 ); |
| 2530 | |
| 2531 | n_accessible_dist = 0; |
| 2532 | for (i = 0; i < N_PRIMARY_MAP; i++) { |
| 2533 | sm = primary_map[i]; |
| 2534 | if (is_distinguished_sm(sm) |
| 2535 | && sm != &sm_distinguished[SM_DIST_NOACCESS]) |
| 2536 | n_accessible_dist ++; |
| 2537 | } |
| 2538 | for (i = 0; i < auxmap_used; i++) { |
| 2539 | sm = auxmap[i].sm; |
| 2540 | if (is_distinguished_sm(sm) |
| 2541 | && sm != &sm_distinguished[SM_DIST_NOACCESS]) |
| 2542 | n_accessible_dist ++; |
| 2543 | } |
| 2544 | |
| 2545 | VG_(message)(Vg_DebugMsg, |
| 2546 | " memcheck: secondaries: %d accessible and distinguished (%dk, %dM)", |
| 2547 | n_accessible_dist, |
| 2548 | n_accessible_dist * 64, |
| 2549 | n_accessible_dist / 16 ); |
| 2550 | |
sewardj | 45d94cc | 2005-04-20 14:44:11 +0000 | [diff] [blame] | 2551 | } |
| 2552 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 2553 | if (0) { |
| 2554 | VG_(message)(Vg_DebugMsg, |
| 2555 | "------ Valgrind's client block stats follow ---------------" ); |
nethercote | 8b76fe5 | 2004-11-08 19:20:09 +0000 | [diff] [blame] | 2556 | show_client_block_stats(); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 2557 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2558 | } |
| 2559 | |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 2560 | static void mc_pre_clo_init(void) |
| 2561 | { |
| 2562 | VG_(details_name) ("Memcheck"); |
| 2563 | VG_(details_version) (NULL); |
| 2564 | VG_(details_description) ("a memory error detector"); |
| 2565 | VG_(details_copyright_author)( |
| 2566 | "Copyright (C) 2002-2005, and GNU GPL'd, by Julian Seward et al."); |
| 2567 | VG_(details_bug_reports_to) (VG_BUGS_TO); |
| 2568 | VG_(details_avg_translation_sizeB) ( 370 ); |
| 2569 | |
| 2570 | VG_(basic_tool_funcs) (mc_post_clo_init, |
| 2571 | MC_(instrument), |
| 2572 | mc_fini); |
| 2573 | |
| 2574 | VG_(needs_core_errors) (); |
| 2575 | VG_(needs_tool_errors) (MAC_(eq_Error), |
| 2576 | mc_pp_Error, |
| 2577 | MAC_(update_extra), |
| 2578 | mc_recognised_suppression, |
| 2579 | MAC_(read_extra_suppression_info), |
| 2580 | MAC_(error_matches_suppression), |
| 2581 | MAC_(get_error_name), |
| 2582 | MAC_(print_extra_suppression_info)); |
| 2583 | VG_(needs_libc_freeres) (); |
| 2584 | VG_(needs_command_line_options)(mc_process_cmd_line_option, |
| 2585 | mc_print_usage, |
| 2586 | mc_print_debug_usage); |
| 2587 | VG_(needs_client_requests) (mc_handle_client_request); |
| 2588 | VG_(needs_sanity_checks) (mc_cheap_sanity_check, |
| 2589 | mc_expensive_sanity_check); |
| 2590 | VG_(needs_shadow_memory) (); |
| 2591 | |
njn | fc51f8d | 2005-06-21 03:20:17 +0000 | [diff] [blame] | 2592 | VG_(needs_malloc_replacement) (MAC_(malloc), |
njn | 51d827b | 2005-05-09 01:02:08 +0000 | [diff] [blame] | 2593 | MAC_(__builtin_new), |
| 2594 | MAC_(__builtin_vec_new), |
| 2595 | MAC_(memalign), |
| 2596 | MAC_(calloc), |
| 2597 | MAC_(free), |
| 2598 | MAC_(__builtin_delete), |
| 2599 | MAC_(__builtin_vec_delete), |
| 2600 | MAC_(realloc), |
| 2601 | MAC_MALLOC_REDZONE_SZB ); |
| 2602 | |
| 2603 | MAC_( new_mem_heap) = & mc_new_mem_heap; |
| 2604 | MAC_( ban_mem_heap) = & mc_make_noaccess; |
| 2605 | MAC_(copy_mem_heap) = & mc_copy_address_range_state; |
| 2606 | MAC_( die_mem_heap) = & mc_make_noaccess; |
| 2607 | MAC_(check_noaccess) = & mc_check_noaccess; |
| 2608 | |
| 2609 | VG_(track_new_mem_startup) ( & mc_new_mem_startup ); |
| 2610 | VG_(track_new_mem_stack_signal)( & mc_make_writable ); |
| 2611 | VG_(track_new_mem_brk) ( & mc_make_writable ); |
| 2612 | VG_(track_new_mem_mmap) ( & mc_new_mem_mmap ); |
| 2613 | |
| 2614 | VG_(track_copy_mem_remap) ( & mc_copy_address_range_state ); |
| 2615 | |
| 2616 | VG_(track_die_mem_stack_signal)( & mc_make_noaccess ); |
| 2617 | VG_(track_die_mem_brk) ( & mc_make_noaccess ); |
| 2618 | VG_(track_die_mem_munmap) ( & mc_make_noaccess ); |
| 2619 | |
| 2620 | VG_(track_new_mem_stack_4) ( & MAC_(new_mem_stack_4) ); |
| 2621 | VG_(track_new_mem_stack_8) ( & MAC_(new_mem_stack_8) ); |
| 2622 | VG_(track_new_mem_stack_12) ( & MAC_(new_mem_stack_12) ); |
| 2623 | VG_(track_new_mem_stack_16) ( & MAC_(new_mem_stack_16) ); |
| 2624 | VG_(track_new_mem_stack_32) ( & MAC_(new_mem_stack_32) ); |
| 2625 | VG_(track_new_mem_stack) ( & MAC_(new_mem_stack) ); |
| 2626 | |
| 2627 | VG_(track_die_mem_stack_4) ( & MAC_(die_mem_stack_4) ); |
| 2628 | VG_(track_die_mem_stack_8) ( & MAC_(die_mem_stack_8) ); |
| 2629 | VG_(track_die_mem_stack_12) ( & MAC_(die_mem_stack_12) ); |
| 2630 | VG_(track_die_mem_stack_16) ( & MAC_(die_mem_stack_16) ); |
| 2631 | VG_(track_die_mem_stack_32) ( & MAC_(die_mem_stack_32) ); |
| 2632 | VG_(track_die_mem_stack) ( & MAC_(die_mem_stack) ); |
| 2633 | |
| 2634 | VG_(track_ban_mem_stack) ( & mc_make_noaccess ); |
| 2635 | |
| 2636 | VG_(track_pre_mem_read) ( & mc_check_is_readable ); |
| 2637 | VG_(track_pre_mem_read_asciiz) ( & mc_check_is_readable_asciiz ); |
| 2638 | VG_(track_pre_mem_write) ( & mc_check_is_writable ); |
| 2639 | VG_(track_post_mem_write) ( & mc_post_mem_write ); |
| 2640 | |
| 2641 | VG_(track_pre_reg_read) ( & mc_pre_reg_read ); |
| 2642 | |
| 2643 | VG_(track_post_reg_write) ( & mc_post_reg_write ); |
| 2644 | VG_(track_post_reg_write_clientcall_return)( & mc_post_reg_write_clientcall ); |
| 2645 | |
| 2646 | VG_(register_profile_event) ( VgpSetMem, "set-mem-perms" ); |
| 2647 | VG_(register_profile_event) ( VgpCheckMem, "check-mem-perms" ); |
| 2648 | VG_(register_profile_event) ( VgpESPAdj, "adjust-ESP" ); |
| 2649 | |
| 2650 | /* Additional block description for VG_(describe_addr)() */ |
| 2651 | MAC_(describe_addr_supp) = client_perm_maybe_describe; |
| 2652 | |
| 2653 | init_shadow_memory(); |
| 2654 | MAC_(common_pre_clo_init)(); |
| 2655 | |
| 2656 | tl_assert( mc_expensive_sanity_check() ); |
| 2657 | } |
| 2658 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame^] | 2659 | VG_DETERMINE_INTERFACE_VERSION(mc_pre_clo_init) |
fitzhardinge | 98abfc7 | 2003-12-16 02:05:15 +0000 | [diff] [blame] | 2660 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2661 | /*--------------------------------------------------------------------*/ |
njn25 | cac76cb | 2002-09-23 11:21:57 +0000 | [diff] [blame] | 2662 | /*--- end mc_main.c ---*/ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2663 | /*--------------------------------------------------------------------*/ |