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 | /* |
njn | c953984 | 2002-10-02 13:26:35 +0000 | [diff] [blame] | 9 | This file is part of MemCheck, a heavyweight Valgrind skin for |
| 10 | detecting memory errors. |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 11 | |
| 12 | Copyright (C) 2000-2002 Julian Seward |
| 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 | |
njn25 | cac76cb | 2002-09-23 11:21:57 +0000 | [diff] [blame] | 33 | #include "mc_include.h" |
| 34 | #include "memcheck.h" /* for client requests */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 35 | //#include "vg_profile.c" |
| 36 | |
njn | 27f1a38 | 2002-11-08 15:48:16 +0000 | [diff] [blame] | 37 | VG_DETERMINE_INTERFACE_VERSION |
| 38 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 39 | /* Define to debug the mem audit system. */ |
| 40 | /* #define VG_DEBUG_MEMORY */ |
| 41 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 42 | /* Define to collect detailed performance info. */ |
| 43 | /* #define VG_PROFILE_MEMORY */ |
| 44 | |
| 45 | #define DEBUG(fmt, args...) //VG_(printf)(fmt, ## args) |
| 46 | |
| 47 | /*------------------------------------------------------------*/ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 48 | /*--- Profiling events ---*/ |
| 49 | /*------------------------------------------------------------*/ |
| 50 | |
| 51 | typedef |
| 52 | enum { |
| 53 | VgpCheckMem = VgpFini+1, |
| 54 | VgpSetMem |
| 55 | } |
| 56 | VgpSkinCC; |
| 57 | |
| 58 | /*------------------------------------------------------------*/ |
| 59 | /*--- Low-level support for memory checking. ---*/ |
| 60 | /*------------------------------------------------------------*/ |
| 61 | |
| 62 | /* All reads and writes are checked against a memory map, which |
| 63 | records the state of all memory in the process. The memory map is |
| 64 | organised like this: |
| 65 | |
| 66 | The top 16 bits of an address are used to index into a top-level |
| 67 | map table, containing 65536 entries. Each entry is a pointer to a |
| 68 | second-level map, which records the accesibililty and validity |
| 69 | permissions for the 65536 bytes indexed by the lower 16 bits of the |
| 70 | address. Each byte is represented by nine bits, one indicating |
| 71 | accessibility, the other eight validity. So each second-level map |
| 72 | contains 73728 bytes. This two-level arrangement conveniently |
| 73 | divides the 4G address space into 64k lumps, each size 64k bytes. |
| 74 | |
| 75 | All entries in the primary (top-level) map must point to a valid |
| 76 | secondary (second-level) map. Since most of the 4G of address |
| 77 | space will not be in use -- ie, not mapped at all -- there is a |
| 78 | distinguished secondary map, which indicates `not addressible and |
| 79 | not valid' writeable for all bytes. Entries in the primary map for |
| 80 | which the entire 64k is not in use at all point at this |
| 81 | distinguished map. |
| 82 | |
| 83 | [...] lots of stuff deleted due to out of date-ness |
| 84 | |
| 85 | As a final optimisation, the alignment and address checks for |
| 86 | 4-byte loads and stores are combined in a neat way. The primary |
| 87 | map is extended to have 262144 entries (2^18), rather than 2^16. |
| 88 | The top 3/4 of these entries are permanently set to the |
| 89 | distinguished secondary map. For a 4-byte load/store, the |
| 90 | top-level map is indexed not with (addr >> 16) but instead f(addr), |
| 91 | where |
| 92 | |
| 93 | f( XXXX XXXX XXXX XXXX ____ ____ ____ __YZ ) |
| 94 | = ____ ____ ____ __YZ XXXX XXXX XXXX XXXX or |
| 95 | = ____ ____ ____ __ZY XXXX XXXX XXXX XXXX |
| 96 | |
| 97 | ie the lowest two bits are placed above the 16 high address bits. |
| 98 | If either of these two bits are nonzero, the address is misaligned; |
| 99 | this will select a secondary map from the upper 3/4 of the primary |
| 100 | map. Because this is always the distinguished secondary map, a |
| 101 | (bogus) address check failure will result. The failure handling |
| 102 | code can then figure out whether this is a genuine addr check |
| 103 | failure or whether it is a possibly-legitimate access at a |
| 104 | misaligned address. |
| 105 | */ |
| 106 | |
| 107 | |
| 108 | /*------------------------------------------------------------*/ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 109 | /*--- Function declarations. ---*/ |
| 110 | /*------------------------------------------------------------*/ |
| 111 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 112 | static UInt mc_rd_V4_SLOWLY ( Addr a ); |
| 113 | static UInt mc_rd_V2_SLOWLY ( Addr a ); |
| 114 | static UInt mc_rd_V1_SLOWLY ( Addr a ); |
| 115 | static void mc_wr_V4_SLOWLY ( Addr a, UInt vbytes ); |
| 116 | static void mc_wr_V2_SLOWLY ( Addr a, UInt vbytes ); |
| 117 | static void mc_wr_V1_SLOWLY ( Addr a, UInt vbytes ); |
| 118 | static void mc_fpu_read_check_SLOWLY ( Addr addr, Int size ); |
| 119 | static void mc_fpu_write_check_SLOWLY ( Addr addr, Int size ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 120 | |
| 121 | /*------------------------------------------------------------*/ |
| 122 | /*--- Data defns. ---*/ |
| 123 | /*------------------------------------------------------------*/ |
| 124 | |
| 125 | typedef |
| 126 | struct { |
| 127 | UChar abits[8192]; |
| 128 | UChar vbyte[65536]; |
| 129 | } |
| 130 | SecMap; |
| 131 | |
| 132 | static SecMap* primary_map[ /*65536*/ 262144 ]; |
| 133 | static SecMap distinguished_secondary_map; |
| 134 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 135 | |
| 136 | static void init_shadow_memory ( void ) |
| 137 | { |
| 138 | Int i; |
| 139 | |
| 140 | for (i = 0; i < 8192; i++) /* Invalid address */ |
| 141 | distinguished_secondary_map.abits[i] = VGM_BYTE_INVALID; |
| 142 | for (i = 0; i < 65536; i++) /* Invalid Value */ |
| 143 | distinguished_secondary_map.vbyte[i] = VGM_BYTE_INVALID; |
| 144 | |
| 145 | /* These entries gradually get overwritten as the used address |
| 146 | space expands. */ |
| 147 | for (i = 0; i < 65536; i++) |
| 148 | primary_map[i] = &distinguished_secondary_map; |
| 149 | |
| 150 | /* These ones should never change; it's a bug in Valgrind if they do. */ |
| 151 | for (i = 65536; i < 262144; i++) |
| 152 | primary_map[i] = &distinguished_secondary_map; |
| 153 | } |
| 154 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 155 | /*------------------------------------------------------------*/ |
| 156 | /*--- Basic bitmap management, reading and writing. ---*/ |
| 157 | /*------------------------------------------------------------*/ |
| 158 | |
| 159 | /* Allocate and initialise a secondary map. */ |
| 160 | |
| 161 | static SecMap* alloc_secondary_map ( __attribute__ ((unused)) |
| 162 | Char* caller ) |
| 163 | { |
| 164 | SecMap* map; |
| 165 | UInt i; |
| 166 | PROF_EVENT(10); |
| 167 | |
| 168 | /* Mark all bytes as invalid access and invalid value. */ |
| 169 | |
| 170 | /* It just happens that a SecMap occupies exactly 18 pages -- |
| 171 | although this isn't important, so the following assert is |
| 172 | spurious. */ |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 173 | sk_assert(0 == (sizeof(SecMap) % VKI_BYTES_PER_PAGE)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 174 | map = VG_(get_memory_from_mmap)( sizeof(SecMap), caller ); |
| 175 | |
| 176 | for (i = 0; i < 8192; i++) |
| 177 | map->abits[i] = VGM_BYTE_INVALID; /* Invalid address */ |
| 178 | for (i = 0; i < 65536; i++) |
| 179 | map->vbyte[i] = VGM_BYTE_INVALID; /* Invalid Value */ |
| 180 | |
| 181 | /* VG_(printf)("ALLOC_2MAP(%s)\n", caller ); */ |
| 182 | return map; |
| 183 | } |
| 184 | |
| 185 | |
| 186 | /* Basic reading/writing of the bitmaps, for byte-sized accesses. */ |
| 187 | |
| 188 | static __inline__ UChar get_abit ( Addr a ) |
| 189 | { |
| 190 | SecMap* sm = primary_map[a >> 16]; |
| 191 | UInt sm_off = a & 0xFFFF; |
| 192 | PROF_EVENT(20); |
| 193 | # if 0 |
| 194 | if (IS_DISTINGUISHED_SM(sm)) |
| 195 | VG_(message)(Vg_DebugMsg, |
| 196 | "accessed distinguished 2ndary (A)map! 0x%x\n", a); |
| 197 | # endif |
| 198 | return BITARR_TEST(sm->abits, sm_off) |
| 199 | ? VGM_BIT_INVALID : VGM_BIT_VALID; |
| 200 | } |
| 201 | |
| 202 | static __inline__ UChar get_vbyte ( Addr a ) |
| 203 | { |
| 204 | SecMap* sm = primary_map[a >> 16]; |
| 205 | UInt sm_off = a & 0xFFFF; |
| 206 | PROF_EVENT(21); |
| 207 | # if 0 |
| 208 | if (IS_DISTINGUISHED_SM(sm)) |
| 209 | VG_(message)(Vg_DebugMsg, |
| 210 | "accessed distinguished 2ndary (V)map! 0x%x\n", a); |
| 211 | # endif |
| 212 | return sm->vbyte[sm_off]; |
| 213 | } |
| 214 | |
| 215 | static __inline__ void set_abit ( Addr a, UChar abit ) |
| 216 | { |
| 217 | SecMap* sm; |
| 218 | UInt sm_off; |
| 219 | PROF_EVENT(22); |
| 220 | ENSURE_MAPPABLE(a, "set_abit"); |
| 221 | sm = primary_map[a >> 16]; |
| 222 | sm_off = a & 0xFFFF; |
| 223 | if (abit) |
| 224 | BITARR_SET(sm->abits, sm_off); |
| 225 | else |
| 226 | BITARR_CLEAR(sm->abits, sm_off); |
| 227 | } |
| 228 | |
| 229 | static __inline__ void set_vbyte ( Addr a, UChar vbyte ) |
| 230 | { |
| 231 | SecMap* sm; |
| 232 | UInt sm_off; |
| 233 | PROF_EVENT(23); |
| 234 | ENSURE_MAPPABLE(a, "set_vbyte"); |
| 235 | sm = primary_map[a >> 16]; |
| 236 | sm_off = a & 0xFFFF; |
| 237 | sm->vbyte[sm_off] = vbyte; |
| 238 | } |
| 239 | |
| 240 | |
| 241 | /* Reading/writing of the bitmaps, for aligned word-sized accesses. */ |
| 242 | |
| 243 | static __inline__ UChar get_abits4_ALIGNED ( Addr a ) |
| 244 | { |
| 245 | SecMap* sm; |
| 246 | UInt sm_off; |
| 247 | UChar abits8; |
| 248 | PROF_EVENT(24); |
| 249 | # ifdef VG_DEBUG_MEMORY |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 250 | sk_assert(IS_ALIGNED4_ADDR(a)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 251 | # endif |
| 252 | sm = primary_map[a >> 16]; |
| 253 | sm_off = a & 0xFFFF; |
| 254 | abits8 = sm->abits[sm_off >> 3]; |
| 255 | abits8 >>= (a & 4 /* 100b */); /* a & 4 is either 0 or 4 */ |
| 256 | abits8 &= 0x0F; |
| 257 | return abits8; |
| 258 | } |
| 259 | |
| 260 | static UInt __inline__ get_vbytes4_ALIGNED ( Addr a ) |
| 261 | { |
| 262 | SecMap* sm = primary_map[a >> 16]; |
| 263 | UInt sm_off = a & 0xFFFF; |
| 264 | PROF_EVENT(25); |
| 265 | # ifdef VG_DEBUG_MEMORY |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 266 | sk_assert(IS_ALIGNED4_ADDR(a)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 267 | # endif |
| 268 | return ((UInt*)(sm->vbyte))[sm_off >> 2]; |
| 269 | } |
| 270 | |
| 271 | |
| 272 | /*------------------------------------------------------------*/ |
| 273 | /*--- Setting permissions over address ranges. ---*/ |
| 274 | /*------------------------------------------------------------*/ |
| 275 | |
| 276 | static void set_address_range_perms ( Addr a, UInt len, |
| 277 | UInt example_a_bit, |
| 278 | UInt example_v_bit ) |
| 279 | { |
| 280 | UChar vbyte, abyte8; |
| 281 | UInt vword4, sm_off; |
| 282 | SecMap* sm; |
| 283 | |
| 284 | PROF_EVENT(30); |
| 285 | |
| 286 | if (len == 0) |
| 287 | return; |
| 288 | |
| 289 | if (len > 100 * 1000 * 1000) { |
| 290 | VG_(message)(Vg_UserMsg, |
| 291 | "Warning: set address range perms: " |
| 292 | "large range %u, a %d, v %d", |
| 293 | len, example_a_bit, example_v_bit ); |
| 294 | } |
| 295 | |
| 296 | VGP_PUSHCC(VgpSetMem); |
| 297 | |
| 298 | /* Requests to change permissions of huge address ranges may |
| 299 | indicate bugs in our machinery. 30,000,000 is arbitrary, but so |
| 300 | far all legitimate requests have fallen beneath that size. */ |
| 301 | /* 4 Mar 02: this is just stupid; get rid of it. */ |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 302 | /* sk_assert(len < 30000000); */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 303 | |
| 304 | /* Check the permissions make sense. */ |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 305 | sk_assert(example_a_bit == VGM_BIT_VALID |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 306 | || example_a_bit == VGM_BIT_INVALID); |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 307 | sk_assert(example_v_bit == VGM_BIT_VALID |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 308 | || example_v_bit == VGM_BIT_INVALID); |
| 309 | if (example_a_bit == VGM_BIT_INVALID) |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 310 | sk_assert(example_v_bit == VGM_BIT_INVALID); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 311 | |
| 312 | /* The validity bits to write. */ |
| 313 | vbyte = example_v_bit==VGM_BIT_VALID |
| 314 | ? VGM_BYTE_VALID : VGM_BYTE_INVALID; |
| 315 | |
| 316 | /* In order that we can charge through the address space at 8 |
| 317 | bytes/main-loop iteration, make up some perms. */ |
| 318 | abyte8 = (example_a_bit << 7) |
| 319 | | (example_a_bit << 6) |
| 320 | | (example_a_bit << 5) |
| 321 | | (example_a_bit << 4) |
| 322 | | (example_a_bit << 3) |
| 323 | | (example_a_bit << 2) |
| 324 | | (example_a_bit << 1) |
| 325 | | (example_a_bit << 0); |
| 326 | vword4 = (vbyte << 24) | (vbyte << 16) | (vbyte << 8) | vbyte; |
| 327 | |
| 328 | # ifdef VG_DEBUG_MEMORY |
| 329 | /* Do it ... */ |
| 330 | while (True) { |
| 331 | PROF_EVENT(31); |
| 332 | if (len == 0) break; |
| 333 | set_abit ( a, example_a_bit ); |
| 334 | set_vbyte ( a, vbyte ); |
| 335 | a++; |
| 336 | len--; |
| 337 | } |
| 338 | |
| 339 | # else |
| 340 | /* Slowly do parts preceding 8-byte alignment. */ |
| 341 | while (True) { |
| 342 | PROF_EVENT(31); |
| 343 | if (len == 0) break; |
| 344 | if ((a % 8) == 0) break; |
| 345 | set_abit ( a, example_a_bit ); |
| 346 | set_vbyte ( a, vbyte ); |
| 347 | a++; |
| 348 | len--; |
| 349 | } |
| 350 | |
| 351 | if (len == 0) { |
| 352 | VGP_POPCC(VgpSetMem); |
| 353 | return; |
| 354 | } |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 355 | sk_assert((a % 8) == 0 && len > 0); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 356 | |
| 357 | /* Once aligned, go fast. */ |
| 358 | while (True) { |
| 359 | PROF_EVENT(32); |
| 360 | if (len < 8) break; |
| 361 | ENSURE_MAPPABLE(a, "set_address_range_perms(fast)"); |
| 362 | sm = primary_map[a >> 16]; |
| 363 | sm_off = a & 0xFFFF; |
| 364 | sm->abits[sm_off >> 3] = abyte8; |
| 365 | ((UInt*)(sm->vbyte))[(sm_off >> 2) + 0] = vword4; |
| 366 | ((UInt*)(sm->vbyte))[(sm_off >> 2) + 1] = vword4; |
| 367 | a += 8; |
| 368 | len -= 8; |
| 369 | } |
| 370 | |
| 371 | if (len == 0) { |
| 372 | VGP_POPCC(VgpSetMem); |
| 373 | return; |
| 374 | } |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 375 | sk_assert((a % 8) == 0 && len > 0 && len < 8); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 376 | |
| 377 | /* Finish the upper fragment. */ |
| 378 | while (True) { |
| 379 | PROF_EVENT(33); |
| 380 | if (len == 0) break; |
| 381 | set_abit ( a, example_a_bit ); |
| 382 | set_vbyte ( a, vbyte ); |
| 383 | a++; |
| 384 | len--; |
| 385 | } |
| 386 | # endif |
| 387 | |
| 388 | /* Check that zero page and highest page have not been written to |
| 389 | -- this could happen with buggy syscall wrappers. Today |
| 390 | (2001-04-26) had precisely such a problem with __NR_setitimer. */ |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 391 | sk_assert(SK_(cheap_sanity_check)()); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 392 | VGP_POPCC(VgpSetMem); |
| 393 | } |
| 394 | |
| 395 | /* Set permissions for address ranges ... */ |
| 396 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 397 | void MC_(make_noaccess) ( Addr a, UInt len ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 398 | { |
| 399 | PROF_EVENT(35); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 400 | DEBUG("MC_(make_noaccess)(%p, %x)\n", a, len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 401 | set_address_range_perms ( a, len, VGM_BIT_INVALID, VGM_BIT_INVALID ); |
| 402 | } |
| 403 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 404 | void MC_(make_writable) ( Addr a, UInt len ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 405 | { |
| 406 | PROF_EVENT(36); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 407 | DEBUG("MC_(make_writable)(%p, %x)\n", a, len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 408 | set_address_range_perms ( a, len, VGM_BIT_VALID, VGM_BIT_INVALID ); |
| 409 | } |
| 410 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 411 | void MC_(make_readable) ( Addr a, UInt len ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 412 | { |
| 413 | PROF_EVENT(37); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 414 | DEBUG("MC_(make_readable)(%p, 0x%x)\n", a, len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 415 | set_address_range_perms ( a, len, VGM_BIT_VALID, VGM_BIT_VALID ); |
| 416 | } |
| 417 | |
| 418 | /* Block-copy permissions (needed for implementing realloc()). */ |
| 419 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 420 | static void mc_copy_address_range_state ( Addr src, Addr dst, UInt len ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 421 | { |
| 422 | UInt i; |
| 423 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 424 | DEBUG("mc_copy_address_range_state\n"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 425 | |
| 426 | PROF_EVENT(40); |
| 427 | for (i = 0; i < len; i++) { |
| 428 | UChar abit = get_abit ( src+i ); |
| 429 | UChar vbyte = get_vbyte ( src+i ); |
| 430 | PROF_EVENT(41); |
| 431 | set_abit ( dst+i, abit ); |
| 432 | set_vbyte ( dst+i, vbyte ); |
| 433 | } |
| 434 | } |
| 435 | |
| 436 | |
| 437 | /* Check permissions for address range. If inadequate permissions |
| 438 | exist, *bad_addr is set to the offending address, so the caller can |
| 439 | know what it is. */ |
| 440 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 441 | Bool MC_(check_writable) ( Addr a, UInt len, Addr* bad_addr ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 442 | { |
| 443 | UInt i; |
| 444 | UChar abit; |
| 445 | PROF_EVENT(42); |
| 446 | for (i = 0; i < len; i++) { |
| 447 | PROF_EVENT(43); |
| 448 | abit = get_abit(a); |
| 449 | if (abit == VGM_BIT_INVALID) { |
| 450 | if (bad_addr != NULL) *bad_addr = a; |
| 451 | return False; |
| 452 | } |
| 453 | a++; |
| 454 | } |
| 455 | return True; |
| 456 | } |
| 457 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 458 | Bool MC_(check_readable) ( Addr a, UInt len, Addr* bad_addr ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 459 | { |
| 460 | UInt i; |
| 461 | UChar abit; |
| 462 | UChar vbyte; |
| 463 | |
| 464 | PROF_EVENT(44); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 465 | DEBUG("MC_(check_readable)\n"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 466 | for (i = 0; i < len; i++) { |
| 467 | abit = get_abit(a); |
| 468 | vbyte = get_vbyte(a); |
| 469 | PROF_EVENT(45); |
| 470 | if (abit != VGM_BIT_VALID || vbyte != VGM_BYTE_VALID) { |
| 471 | if (bad_addr != NULL) *bad_addr = a; |
| 472 | return False; |
| 473 | } |
| 474 | a++; |
| 475 | } |
| 476 | return True; |
| 477 | } |
| 478 | |
| 479 | |
| 480 | /* Check a zero-terminated ascii string. Tricky -- don't want to |
| 481 | examine the actual bytes, to find the end, until we're sure it is |
| 482 | safe to do so. */ |
| 483 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 484 | Bool mc_check_readable_asciiz ( Addr a, Addr* bad_addr ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 485 | { |
| 486 | UChar abit; |
| 487 | UChar vbyte; |
| 488 | PROF_EVENT(46); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 489 | DEBUG("mc_check_readable_asciiz\n"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 490 | while (True) { |
| 491 | PROF_EVENT(47); |
| 492 | abit = get_abit(a); |
| 493 | vbyte = get_vbyte(a); |
| 494 | if (abit != VGM_BIT_VALID || vbyte != VGM_BYTE_VALID) { |
| 495 | if (bad_addr != NULL) *bad_addr = a; |
| 496 | return False; |
| 497 | } |
| 498 | /* Ok, a is safe to read. */ |
| 499 | if (* ((UChar*)a) == 0) return True; |
| 500 | a++; |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | |
| 505 | /*------------------------------------------------------------*/ |
| 506 | /*--- Memory event handlers ---*/ |
| 507 | /*------------------------------------------------------------*/ |
| 508 | |
| 509 | /* Setting permissions for aligned words. This supports fast stack |
| 510 | operations. */ |
| 511 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 512 | static void mc_make_noaccess_aligned ( Addr a, UInt len ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 513 | { |
| 514 | SecMap* sm; |
| 515 | UInt sm_off; |
| 516 | UChar mask; |
| 517 | Addr a_past_end = a + len; |
| 518 | |
| 519 | VGP_PUSHCC(VgpSetMem); |
| 520 | |
| 521 | PROF_EVENT(50); |
| 522 | # ifdef VG_DEBUG_MEMORY |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 523 | sk_assert(IS_ALIGNED4_ADDR(a)); |
| 524 | sk_assert(IS_ALIGNED4_ADDR(len)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 525 | # endif |
| 526 | |
| 527 | for ( ; a < a_past_end; a += 4) { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 528 | ENSURE_MAPPABLE(a, "mc_make_noaccess_aligned"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 529 | sm = primary_map[a >> 16]; |
| 530 | sm_off = a & 0xFFFF; |
| 531 | ((UInt*)(sm->vbyte))[sm_off >> 2] = VGM_WORD_INVALID; |
| 532 | mask = 0x0F; |
| 533 | mask <<= (a & 4 /* 100b */); /* a & 4 is either 0 or 4 */ |
| 534 | /* mask now contains 1s where we wish to make address bits |
| 535 | invalid (1s). */ |
| 536 | sm->abits[sm_off >> 3] |= mask; |
| 537 | } |
| 538 | VGP_POPCC(VgpSetMem); |
| 539 | } |
| 540 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 541 | static void mc_make_writable_aligned ( Addr a, UInt len ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 542 | { |
| 543 | SecMap* sm; |
| 544 | UInt sm_off; |
| 545 | UChar mask; |
| 546 | Addr a_past_end = a + len; |
| 547 | |
| 548 | VGP_PUSHCC(VgpSetMem); |
| 549 | |
| 550 | PROF_EVENT(51); |
| 551 | # ifdef VG_DEBUG_MEMORY |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 552 | sk_assert(IS_ALIGNED4_ADDR(a)); |
| 553 | sk_assert(IS_ALIGNED4_ADDR(len)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 554 | # endif |
| 555 | |
| 556 | for ( ; a < a_past_end; a += 4) { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 557 | ENSURE_MAPPABLE(a, "mc_make_writable_aligned"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 558 | sm = primary_map[a >> 16]; |
| 559 | sm_off = a & 0xFFFF; |
| 560 | ((UInt*)(sm->vbyte))[sm_off >> 2] = VGM_WORD_INVALID; |
| 561 | mask = 0x0F; |
| 562 | mask <<= (a & 4 /* 100b */); /* a & 4 is either 0 or 4 */ |
| 563 | /* mask now contains 1s where we wish to make address bits |
| 564 | invalid (0s). */ |
| 565 | sm->abits[sm_off >> 3] &= ~mask; |
| 566 | } |
| 567 | VGP_POPCC(VgpSetMem); |
| 568 | } |
| 569 | |
| 570 | |
| 571 | static |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 572 | void mc_check_is_writable ( CorePart part, ThreadState* tst, |
| 573 | Char* s, Addr base, UInt size ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 574 | { |
| 575 | Bool ok; |
| 576 | Addr bad_addr; |
| 577 | |
| 578 | VGP_PUSHCC(VgpCheckMem); |
| 579 | |
| 580 | /* VG_(message)(Vg_DebugMsg,"check is writable: %x .. %x", |
| 581 | base,base+size-1); */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 582 | ok = MC_(check_writable) ( base, size, &bad_addr ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 583 | if (!ok) { |
| 584 | switch (part) { |
| 585 | case Vg_CoreSysCall: |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 586 | MC_(record_param_error) ( tst, bad_addr, /*isWrite =*/True, s ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 587 | break; |
| 588 | |
| 589 | case Vg_CorePThread: |
| 590 | case Vg_CoreSignal: |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 591 | MC_(record_core_mem_error)( tst, /*isWrite=*/True, s ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 592 | break; |
| 593 | |
| 594 | default: |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 595 | VG_(skin_panic)("mc_check_is_writable: unexpected CorePart"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 596 | } |
| 597 | } |
| 598 | |
| 599 | VGP_POPCC(VgpCheckMem); |
| 600 | } |
| 601 | |
| 602 | static |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 603 | void mc_check_is_readable ( CorePart part, ThreadState* tst, |
| 604 | Char* s, Addr base, UInt size ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 605 | { |
| 606 | Bool ok; |
| 607 | Addr bad_addr; |
| 608 | |
| 609 | VGP_PUSHCC(VgpCheckMem); |
| 610 | |
| 611 | /* VG_(message)(Vg_DebugMsg,"check is readable: %x .. %x", |
| 612 | base,base+size-1); */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 613 | ok = MC_(check_readable) ( base, size, &bad_addr ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 614 | if (!ok) { |
| 615 | switch (part) { |
| 616 | case Vg_CoreSysCall: |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 617 | MC_(record_param_error) ( tst, bad_addr, /*isWrite =*/False, s ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 618 | break; |
| 619 | |
| 620 | case Vg_CorePThread: |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 621 | MC_(record_core_mem_error)( tst, /*isWrite=*/False, s ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 622 | break; |
| 623 | |
| 624 | /* If we're being asked to jump to a silly address, record an error |
| 625 | message before potentially crashing the entire system. */ |
| 626 | case Vg_CoreTranslate: |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 627 | MC_(record_jump_error)( tst, bad_addr ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 628 | break; |
| 629 | |
| 630 | default: |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 631 | VG_(skin_panic)("mc_check_is_readable: unexpected CorePart"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 632 | } |
| 633 | } |
| 634 | VGP_POPCC(VgpCheckMem); |
| 635 | } |
| 636 | |
| 637 | static |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 638 | void mc_check_is_readable_asciiz ( CorePart part, ThreadState* tst, |
| 639 | Char* s, Addr str ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 640 | { |
| 641 | Bool ok = True; |
| 642 | Addr bad_addr; |
| 643 | /* VG_(message)(Vg_DebugMsg,"check is readable asciiz: 0x%x",str); */ |
| 644 | |
| 645 | VGP_PUSHCC(VgpCheckMem); |
| 646 | |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 647 | sk_assert(part == Vg_CoreSysCall); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 648 | ok = mc_check_readable_asciiz ( (Addr)str, &bad_addr ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 649 | if (!ok) { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 650 | MC_(record_param_error) ( tst, bad_addr, /*is_writable =*/False, s ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 651 | } |
| 652 | |
| 653 | VGP_POPCC(VgpCheckMem); |
| 654 | } |
| 655 | |
| 656 | |
| 657 | static |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 658 | void mc_new_mem_startup( Addr a, UInt len, Bool rr, Bool ww, Bool xx ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 659 | { |
njn | 1f3a909 | 2002-10-04 09:22:30 +0000 | [diff] [blame] | 660 | /* Ignore the permissions, just make it readable. Seems to work... */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 661 | DEBUG("mc_new_mem_startup(%p, %u, rr=%u, ww=%u, xx=%u)\n", a,len,rr,ww,xx); |
| 662 | MC_(make_readable)(a, len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 663 | } |
| 664 | |
| 665 | static |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 666 | void mc_new_mem_heap ( Addr a, UInt len, Bool is_inited ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 667 | { |
| 668 | if (is_inited) { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 669 | MC_(make_readable)(a, len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 670 | } else { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 671 | MC_(make_writable)(a, len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 672 | } |
| 673 | } |
| 674 | |
| 675 | static |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 676 | void mc_set_perms (Addr a, UInt len, Bool rr, Bool ww, Bool xx) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 677 | { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 678 | DEBUG("mc_set_perms(%p, %u, rr=%u ww=%u, xx=%u)\n", a, len, rr, ww, xx); |
| 679 | if (rr) MC_(make_readable)(a, len); |
| 680 | else if (ww) MC_(make_writable)(a, len); |
| 681 | else MC_(make_noaccess)(a, len); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 682 | } |
| 683 | |
| 684 | |
| 685 | /*------------------------------------------------------------*/ |
| 686 | /*--- Functions called directly from generated code. ---*/ |
| 687 | /*------------------------------------------------------------*/ |
| 688 | |
| 689 | static __inline__ UInt rotateRight16 ( UInt x ) |
| 690 | { |
| 691 | /* Amazingly, gcc turns this into a single rotate insn. */ |
| 692 | return (x >> 16) | (x << 16); |
| 693 | } |
| 694 | |
| 695 | |
| 696 | static __inline__ UInt shiftRight16 ( UInt x ) |
| 697 | { |
| 698 | return x >> 16; |
| 699 | } |
| 700 | |
| 701 | |
| 702 | /* Read/write 1/2/4 sized V bytes, and emit an address error if |
| 703 | needed. */ |
| 704 | |
| 705 | /* VG_(helperc_{LD,ST}V{1,2,4}) handle the common case fast. |
| 706 | Under all other circumstances, it defers to the relevant _SLOWLY |
| 707 | function, which can handle all situations. |
| 708 | */ |
| 709 | __attribute__ ((regparm(1))) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 710 | UInt MC_(helperc_LOADV4) ( Addr a ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 711 | { |
| 712 | # ifdef VG_DEBUG_MEMORY |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 713 | return mc_rd_V4_SLOWLY(a); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 714 | # else |
| 715 | UInt sec_no = rotateRight16(a) & 0x3FFFF; |
| 716 | SecMap* sm = primary_map[sec_no]; |
| 717 | UInt a_off = (a & 0xFFFF) >> 3; |
| 718 | UChar abits = sm->abits[a_off]; |
| 719 | abits >>= (a & 4); |
| 720 | abits &= 15; |
| 721 | PROF_EVENT(60); |
| 722 | if (abits == VGM_NIBBLE_VALID) { |
| 723 | /* Handle common case quickly: a is suitably aligned, is mapped, |
| 724 | and is addressible. */ |
| 725 | UInt v_off = a & 0xFFFF; |
| 726 | return ((UInt*)(sm->vbyte))[ v_off >> 2 ]; |
| 727 | } else { |
| 728 | /* Slow but general case. */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 729 | return mc_rd_V4_SLOWLY(a); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 730 | } |
| 731 | # endif |
| 732 | } |
| 733 | |
| 734 | __attribute__ ((regparm(2))) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 735 | void MC_(helperc_STOREV4) ( Addr a, UInt vbytes ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 736 | { |
| 737 | # ifdef VG_DEBUG_MEMORY |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 738 | mc_wr_V4_SLOWLY(a, vbytes); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 739 | # else |
| 740 | UInt sec_no = rotateRight16(a) & 0x3FFFF; |
| 741 | SecMap* sm = primary_map[sec_no]; |
| 742 | UInt a_off = (a & 0xFFFF) >> 3; |
| 743 | UChar abits = sm->abits[a_off]; |
| 744 | abits >>= (a & 4); |
| 745 | abits &= 15; |
| 746 | PROF_EVENT(61); |
| 747 | if (abits == VGM_NIBBLE_VALID) { |
| 748 | /* Handle common case quickly: a is suitably aligned, is mapped, |
| 749 | and is addressible. */ |
| 750 | UInt v_off = a & 0xFFFF; |
| 751 | ((UInt*)(sm->vbyte))[ v_off >> 2 ] = vbytes; |
| 752 | } else { |
| 753 | /* Slow but general case. */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 754 | mc_wr_V4_SLOWLY(a, vbytes); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 755 | } |
| 756 | # endif |
| 757 | } |
| 758 | |
| 759 | __attribute__ ((regparm(1))) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 760 | UInt MC_(helperc_LOADV2) ( Addr a ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 761 | { |
| 762 | # ifdef VG_DEBUG_MEMORY |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 763 | return mc_rd_V2_SLOWLY(a); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 764 | # else |
| 765 | UInt sec_no = rotateRight16(a) & 0x1FFFF; |
| 766 | SecMap* sm = primary_map[sec_no]; |
| 767 | UInt a_off = (a & 0xFFFF) >> 3; |
| 768 | PROF_EVENT(62); |
| 769 | if (sm->abits[a_off] == VGM_BYTE_VALID) { |
| 770 | /* Handle common case quickly. */ |
| 771 | UInt v_off = a & 0xFFFF; |
| 772 | return 0xFFFF0000 |
| 773 | | |
| 774 | (UInt)( ((UShort*)(sm->vbyte))[ v_off >> 1 ] ); |
| 775 | } else { |
| 776 | /* Slow but general case. */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 777 | return mc_rd_V2_SLOWLY(a); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 778 | } |
| 779 | # endif |
| 780 | } |
| 781 | |
| 782 | __attribute__ ((regparm(2))) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 783 | void MC_(helperc_STOREV2) ( Addr a, UInt vbytes ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 784 | { |
| 785 | # ifdef VG_DEBUG_MEMORY |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 786 | mc_wr_V2_SLOWLY(a, vbytes); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 787 | # else |
| 788 | UInt sec_no = rotateRight16(a) & 0x1FFFF; |
| 789 | SecMap* sm = primary_map[sec_no]; |
| 790 | UInt a_off = (a & 0xFFFF) >> 3; |
| 791 | PROF_EVENT(63); |
| 792 | if (sm->abits[a_off] == VGM_BYTE_VALID) { |
| 793 | /* Handle common case quickly. */ |
| 794 | UInt v_off = a & 0xFFFF; |
| 795 | ((UShort*)(sm->vbyte))[ v_off >> 1 ] = vbytes & 0x0000FFFF; |
| 796 | } else { |
| 797 | /* Slow but general case. */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 798 | mc_wr_V2_SLOWLY(a, vbytes); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 799 | } |
| 800 | # endif |
| 801 | } |
| 802 | |
| 803 | __attribute__ ((regparm(1))) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 804 | UInt MC_(helperc_LOADV1) ( Addr a ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 805 | { |
| 806 | # ifdef VG_DEBUG_MEMORY |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 807 | return mc_rd_V1_SLOWLY(a); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 808 | # else |
| 809 | UInt sec_no = shiftRight16(a); |
| 810 | SecMap* sm = primary_map[sec_no]; |
| 811 | UInt a_off = (a & 0xFFFF) >> 3; |
| 812 | PROF_EVENT(64); |
| 813 | if (sm->abits[a_off] == VGM_BYTE_VALID) { |
| 814 | /* Handle common case quickly. */ |
| 815 | UInt v_off = a & 0xFFFF; |
| 816 | return 0xFFFFFF00 |
| 817 | | |
| 818 | (UInt)( ((UChar*)(sm->vbyte))[ v_off ] ); |
| 819 | } else { |
| 820 | /* Slow but general case. */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 821 | return mc_rd_V1_SLOWLY(a); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 822 | } |
| 823 | # endif |
| 824 | } |
| 825 | |
| 826 | __attribute__ ((regparm(2))) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 827 | void MC_(helperc_STOREV1) ( Addr a, UInt vbytes ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 828 | { |
| 829 | # ifdef VG_DEBUG_MEMORY |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 830 | mc_wr_V1_SLOWLY(a, vbytes); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 831 | # else |
| 832 | UInt sec_no = shiftRight16(a); |
| 833 | SecMap* sm = primary_map[sec_no]; |
| 834 | UInt a_off = (a & 0xFFFF) >> 3; |
| 835 | PROF_EVENT(65); |
| 836 | if (sm->abits[a_off] == VGM_BYTE_VALID) { |
| 837 | /* Handle common case quickly. */ |
| 838 | UInt v_off = a & 0xFFFF; |
| 839 | ((UChar*)(sm->vbyte))[ v_off ] = vbytes & 0x000000FF; |
| 840 | } else { |
| 841 | /* Slow but general case. */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 842 | mc_wr_V1_SLOWLY(a, vbytes); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 843 | } |
| 844 | # endif |
| 845 | } |
| 846 | |
| 847 | |
| 848 | /*------------------------------------------------------------*/ |
| 849 | /*--- Fallback functions to handle cases that the above ---*/ |
| 850 | /*--- VG_(helperc_{LD,ST}V{1,2,4}) can't manage. ---*/ |
| 851 | /*------------------------------------------------------------*/ |
| 852 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 853 | static UInt mc_rd_V4_SLOWLY ( Addr a ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 854 | { |
| 855 | Bool a0ok, a1ok, a2ok, a3ok; |
| 856 | UInt vb0, vb1, vb2, vb3; |
| 857 | |
| 858 | PROF_EVENT(70); |
| 859 | |
| 860 | /* First establish independently the addressibility of the 4 bytes |
| 861 | involved. */ |
| 862 | a0ok = get_abit(a+0) == VGM_BIT_VALID; |
| 863 | a1ok = get_abit(a+1) == VGM_BIT_VALID; |
| 864 | a2ok = get_abit(a+2) == VGM_BIT_VALID; |
| 865 | a3ok = get_abit(a+3) == VGM_BIT_VALID; |
| 866 | |
| 867 | /* Also get the validity bytes for the address. */ |
| 868 | vb0 = (UInt)get_vbyte(a+0); |
| 869 | vb1 = (UInt)get_vbyte(a+1); |
| 870 | vb2 = (UInt)get_vbyte(a+2); |
| 871 | vb3 = (UInt)get_vbyte(a+3); |
| 872 | |
| 873 | /* Now distinguish 3 cases */ |
| 874 | |
| 875 | /* Case 1: the address is completely valid, so: |
| 876 | - no addressing error |
| 877 | - return V bytes as read from memory |
| 878 | */ |
| 879 | if (a0ok && a1ok && a2ok && a3ok) { |
| 880 | UInt vw = VGM_WORD_INVALID; |
| 881 | vw <<= 8; vw |= vb3; |
| 882 | vw <<= 8; vw |= vb2; |
| 883 | vw <<= 8; vw |= vb1; |
| 884 | vw <<= 8; vw |= vb0; |
| 885 | return vw; |
| 886 | } |
| 887 | |
| 888 | /* Case 2: the address is completely invalid. |
| 889 | - emit addressing error |
| 890 | - return V word indicating validity. |
| 891 | This sounds strange, but if we make loads from invalid addresses |
| 892 | give invalid data, we also risk producing a number of confusing |
| 893 | undefined-value errors later, which confuses the fact that the |
| 894 | error arose in the first place from an invalid address. |
| 895 | */ |
| 896 | /* VG_(printf)("%p (%d %d %d %d)\n", a, a0ok, a1ok, a2ok, a3ok); */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 897 | if (!MC_(clo_partial_loads_ok) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 898 | || ((a & 3) != 0) |
| 899 | || (!a0ok && !a1ok && !a2ok && !a3ok)) { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 900 | MC_(record_address_error)( a, 4, False ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 901 | return (VGM_BYTE_VALID << 24) | (VGM_BYTE_VALID << 16) |
| 902 | | (VGM_BYTE_VALID << 8) | VGM_BYTE_VALID; |
| 903 | } |
| 904 | |
| 905 | /* Case 3: the address is partially valid. |
| 906 | - no addressing error |
| 907 | - returned V word is invalid where the address is invalid, |
| 908 | and contains V bytes from memory otherwise. |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 909 | Case 3 is only allowed if MC_(clo_partial_loads_ok) is True |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 910 | (which is the default), and the address is 4-aligned. |
| 911 | If not, Case 2 will have applied. |
| 912 | */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 913 | sk_assert(MC_(clo_partial_loads_ok)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 914 | { |
| 915 | UInt vw = VGM_WORD_INVALID; |
| 916 | vw <<= 8; vw |= (a3ok ? vb3 : VGM_BYTE_INVALID); |
| 917 | vw <<= 8; vw |= (a2ok ? vb2 : VGM_BYTE_INVALID); |
| 918 | vw <<= 8; vw |= (a1ok ? vb1 : VGM_BYTE_INVALID); |
| 919 | vw <<= 8; vw |= (a0ok ? vb0 : VGM_BYTE_INVALID); |
| 920 | return vw; |
| 921 | } |
| 922 | } |
| 923 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 924 | static void mc_wr_V4_SLOWLY ( Addr a, UInt vbytes ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 925 | { |
| 926 | /* Check the address for validity. */ |
| 927 | Bool aerr = False; |
| 928 | PROF_EVENT(71); |
| 929 | |
| 930 | if (get_abit(a+0) != VGM_BIT_VALID) aerr = True; |
| 931 | if (get_abit(a+1) != VGM_BIT_VALID) aerr = True; |
| 932 | if (get_abit(a+2) != VGM_BIT_VALID) aerr = True; |
| 933 | if (get_abit(a+3) != VGM_BIT_VALID) aerr = True; |
| 934 | |
| 935 | /* Store the V bytes, remembering to do it little-endian-ly. */ |
| 936 | set_vbyte( a+0, vbytes & 0x000000FF ); vbytes >>= 8; |
| 937 | set_vbyte( a+1, vbytes & 0x000000FF ); vbytes >>= 8; |
| 938 | set_vbyte( a+2, vbytes & 0x000000FF ); vbytes >>= 8; |
| 939 | set_vbyte( a+3, vbytes & 0x000000FF ); |
| 940 | |
| 941 | /* If an address error has happened, report it. */ |
| 942 | if (aerr) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 943 | MC_(record_address_error)( a, 4, True ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 944 | } |
| 945 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 946 | static UInt mc_rd_V2_SLOWLY ( Addr a ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 947 | { |
| 948 | /* Check the address for validity. */ |
| 949 | UInt vw = VGM_WORD_INVALID; |
| 950 | Bool aerr = False; |
| 951 | PROF_EVENT(72); |
| 952 | |
| 953 | if (get_abit(a+0) != VGM_BIT_VALID) aerr = True; |
| 954 | if (get_abit(a+1) != VGM_BIT_VALID) aerr = True; |
| 955 | |
| 956 | /* Fetch the V bytes, remembering to do it little-endian-ly. */ |
| 957 | vw <<= 8; vw |= (UInt)get_vbyte(a+1); |
| 958 | vw <<= 8; vw |= (UInt)get_vbyte(a+0); |
| 959 | |
| 960 | /* If an address error has happened, report it. */ |
| 961 | if (aerr) { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 962 | MC_(record_address_error)( a, 2, False ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 963 | vw = (VGM_BYTE_INVALID << 24) | (VGM_BYTE_INVALID << 16) |
| 964 | | (VGM_BYTE_VALID << 8) | (VGM_BYTE_VALID); |
| 965 | } |
| 966 | return vw; |
| 967 | } |
| 968 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 969 | static void mc_wr_V2_SLOWLY ( Addr a, UInt vbytes ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 970 | { |
| 971 | /* Check the address for validity. */ |
| 972 | Bool aerr = False; |
| 973 | PROF_EVENT(73); |
| 974 | |
| 975 | if (get_abit(a+0) != VGM_BIT_VALID) aerr = True; |
| 976 | if (get_abit(a+1) != VGM_BIT_VALID) aerr = True; |
| 977 | |
| 978 | /* Store the V bytes, remembering to do it little-endian-ly. */ |
| 979 | set_vbyte( a+0, vbytes & 0x000000FF ); vbytes >>= 8; |
| 980 | set_vbyte( a+1, vbytes & 0x000000FF ); |
| 981 | |
| 982 | /* If an address error has happened, report it. */ |
| 983 | if (aerr) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 984 | MC_(record_address_error)( a, 2, True ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 985 | } |
| 986 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 987 | static UInt mc_rd_V1_SLOWLY ( Addr a ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 988 | { |
| 989 | /* Check the address for validity. */ |
| 990 | UInt vw = VGM_WORD_INVALID; |
| 991 | Bool aerr = False; |
| 992 | PROF_EVENT(74); |
| 993 | |
| 994 | if (get_abit(a+0) != VGM_BIT_VALID) aerr = True; |
| 995 | |
| 996 | /* Fetch the V byte. */ |
| 997 | vw <<= 8; vw |= (UInt)get_vbyte(a+0); |
| 998 | |
| 999 | /* If an address error has happened, report it. */ |
| 1000 | if (aerr) { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1001 | MC_(record_address_error)( a, 1, False ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1002 | vw = (VGM_BYTE_INVALID << 24) | (VGM_BYTE_INVALID << 16) |
| 1003 | | (VGM_BYTE_INVALID << 8) | (VGM_BYTE_VALID); |
| 1004 | } |
| 1005 | return vw; |
| 1006 | } |
| 1007 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1008 | static void mc_wr_V1_SLOWLY ( Addr a, UInt vbytes ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1009 | { |
| 1010 | /* Check the address for validity. */ |
| 1011 | Bool aerr = False; |
| 1012 | PROF_EVENT(75); |
| 1013 | if (get_abit(a+0) != VGM_BIT_VALID) aerr = True; |
| 1014 | |
| 1015 | /* Store the V bytes, remembering to do it little-endian-ly. */ |
| 1016 | set_vbyte( a+0, vbytes & 0x000000FF ); |
| 1017 | |
| 1018 | /* If an address error has happened, report it. */ |
| 1019 | if (aerr) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1020 | MC_(record_address_error)( a, 1, True ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1021 | } |
| 1022 | |
| 1023 | |
| 1024 | /* --------------------------------------------------------------------- |
| 1025 | Called from generated code, or from the assembly helpers. |
| 1026 | Handlers for value check failures. |
| 1027 | ------------------------------------------------------------------ */ |
| 1028 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1029 | void MC_(helperc_value_check0_fail) ( void ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1030 | { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1031 | MC_(record_value_error) ( 0 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1032 | } |
| 1033 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1034 | void MC_(helperc_value_check1_fail) ( void ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1035 | { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1036 | MC_(record_value_error) ( 1 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1037 | } |
| 1038 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1039 | void MC_(helperc_value_check2_fail) ( void ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1040 | { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1041 | MC_(record_value_error) ( 2 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1042 | } |
| 1043 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1044 | void MC_(helperc_value_check4_fail) ( void ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1045 | { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1046 | MC_(record_value_error) ( 4 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1047 | } |
| 1048 | |
| 1049 | |
| 1050 | /* --------------------------------------------------------------------- |
| 1051 | FPU load and store checks, called from generated code. |
| 1052 | ------------------------------------------------------------------ */ |
| 1053 | |
| 1054 | __attribute__ ((regparm(2))) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1055 | void MC_(fpu_read_check) ( Addr addr, Int size ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1056 | { |
| 1057 | /* Ensure the read area is both addressible and valid (ie, |
| 1058 | readable). If there's an address error, don't report a value |
| 1059 | error too; but if there isn't an address error, check for a |
| 1060 | value error. |
| 1061 | |
| 1062 | Try to be reasonably fast on the common case; wimp out and defer |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1063 | to mc_fpu_read_check_SLOWLY for everything else. */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1064 | |
| 1065 | SecMap* sm; |
| 1066 | UInt sm_off, v_off, a_off; |
| 1067 | Addr addr4; |
| 1068 | |
| 1069 | PROF_EVENT(80); |
| 1070 | |
| 1071 | # ifdef VG_DEBUG_MEMORY |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1072 | mc_fpu_read_check_SLOWLY ( addr, size ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1073 | # else |
| 1074 | |
| 1075 | if (size == 4) { |
| 1076 | if (!IS_ALIGNED4_ADDR(addr)) goto slow4; |
| 1077 | PROF_EVENT(81); |
| 1078 | /* Properly aligned. */ |
| 1079 | sm = primary_map[addr >> 16]; |
| 1080 | sm_off = addr & 0xFFFF; |
| 1081 | a_off = sm_off >> 3; |
| 1082 | if (sm->abits[a_off] != VGM_BYTE_VALID) goto slow4; |
| 1083 | /* Properly aligned and addressible. */ |
| 1084 | v_off = addr & 0xFFFF; |
| 1085 | if (((UInt*)(sm->vbyte))[ v_off >> 2 ] != VGM_WORD_VALID) |
| 1086 | goto slow4; |
| 1087 | /* Properly aligned, addressible and with valid data. */ |
| 1088 | return; |
| 1089 | slow4: |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1090 | mc_fpu_read_check_SLOWLY ( addr, 4 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1091 | return; |
| 1092 | } |
| 1093 | |
| 1094 | if (size == 8) { |
| 1095 | if (!IS_ALIGNED4_ADDR(addr)) goto slow8; |
| 1096 | PROF_EVENT(82); |
| 1097 | /* Properly aligned. Do it in two halves. */ |
| 1098 | addr4 = addr + 4; |
| 1099 | /* First half. */ |
| 1100 | sm = primary_map[addr >> 16]; |
| 1101 | sm_off = addr & 0xFFFF; |
| 1102 | a_off = sm_off >> 3; |
| 1103 | if (sm->abits[a_off] != VGM_BYTE_VALID) goto slow8; |
| 1104 | /* First half properly aligned and addressible. */ |
| 1105 | v_off = addr & 0xFFFF; |
| 1106 | if (((UInt*)(sm->vbyte))[ v_off >> 2 ] != VGM_WORD_VALID) |
| 1107 | goto slow8; |
| 1108 | /* Second half. */ |
| 1109 | sm = primary_map[addr4 >> 16]; |
| 1110 | sm_off = addr4 & 0xFFFF; |
| 1111 | a_off = sm_off >> 3; |
| 1112 | if (sm->abits[a_off] != VGM_BYTE_VALID) goto slow8; |
| 1113 | /* Second half properly aligned and addressible. */ |
| 1114 | v_off = addr4 & 0xFFFF; |
| 1115 | if (((UInt*)(sm->vbyte))[ v_off >> 2 ] != VGM_WORD_VALID) |
| 1116 | goto slow8; |
| 1117 | /* Both halves properly aligned, addressible and with valid |
| 1118 | data. */ |
| 1119 | return; |
| 1120 | slow8: |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1121 | mc_fpu_read_check_SLOWLY ( addr, 8 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1122 | return; |
| 1123 | } |
| 1124 | |
| 1125 | /* Can't be bothered to huff'n'puff to make these (allegedly) rare |
| 1126 | cases go quickly. */ |
| 1127 | if (size == 2) { |
| 1128 | PROF_EVENT(83); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1129 | mc_fpu_read_check_SLOWLY ( addr, 2 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1130 | return; |
| 1131 | } |
| 1132 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1133 | if (size == 10 || size == 28 || size == 108) { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1134 | PROF_EVENT(84); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1135 | mc_fpu_read_check_SLOWLY ( addr, size ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1136 | return; |
| 1137 | } |
| 1138 | |
| 1139 | VG_(printf)("size is %d\n", size); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1140 | VG_(skin_panic)("MC_(fpu_read_check): unhandled size"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1141 | # endif |
| 1142 | } |
| 1143 | |
| 1144 | |
| 1145 | __attribute__ ((regparm(2))) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1146 | void MC_(fpu_write_check) ( Addr addr, Int size ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1147 | { |
| 1148 | /* Ensure the written area is addressible, and moan if otherwise. |
| 1149 | If it is addressible, make it valid, otherwise invalid. |
| 1150 | */ |
| 1151 | |
| 1152 | SecMap* sm; |
| 1153 | UInt sm_off, v_off, a_off; |
| 1154 | Addr addr4; |
| 1155 | |
| 1156 | PROF_EVENT(85); |
| 1157 | |
| 1158 | # ifdef VG_DEBUG_MEMORY |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1159 | mc_fpu_write_check_SLOWLY ( addr, size ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1160 | # else |
| 1161 | |
| 1162 | if (size == 4) { |
| 1163 | if (!IS_ALIGNED4_ADDR(addr)) goto slow4; |
| 1164 | PROF_EVENT(86); |
| 1165 | /* Properly aligned. */ |
| 1166 | sm = primary_map[addr >> 16]; |
| 1167 | sm_off = addr & 0xFFFF; |
| 1168 | a_off = sm_off >> 3; |
| 1169 | if (sm->abits[a_off] != VGM_BYTE_VALID) goto slow4; |
| 1170 | /* Properly aligned and addressible. Make valid. */ |
| 1171 | v_off = addr & 0xFFFF; |
| 1172 | ((UInt*)(sm->vbyte))[ v_off >> 2 ] = VGM_WORD_VALID; |
| 1173 | return; |
| 1174 | slow4: |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1175 | mc_fpu_write_check_SLOWLY ( addr, 4 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1176 | return; |
| 1177 | } |
| 1178 | |
| 1179 | if (size == 8) { |
| 1180 | if (!IS_ALIGNED4_ADDR(addr)) goto slow8; |
| 1181 | PROF_EVENT(87); |
| 1182 | /* Properly aligned. Do it in two halves. */ |
| 1183 | addr4 = addr + 4; |
| 1184 | /* First half. */ |
| 1185 | sm = primary_map[addr >> 16]; |
| 1186 | sm_off = addr & 0xFFFF; |
| 1187 | a_off = sm_off >> 3; |
| 1188 | if (sm->abits[a_off] != VGM_BYTE_VALID) goto slow8; |
| 1189 | /* First half properly aligned and addressible. Make valid. */ |
| 1190 | v_off = addr & 0xFFFF; |
| 1191 | ((UInt*)(sm->vbyte))[ v_off >> 2 ] = VGM_WORD_VALID; |
| 1192 | /* Second half. */ |
| 1193 | sm = primary_map[addr4 >> 16]; |
| 1194 | sm_off = addr4 & 0xFFFF; |
| 1195 | a_off = sm_off >> 3; |
| 1196 | if (sm->abits[a_off] != VGM_BYTE_VALID) goto slow8; |
| 1197 | /* Second half properly aligned and addressible. */ |
| 1198 | v_off = addr4 & 0xFFFF; |
| 1199 | ((UInt*)(sm->vbyte))[ v_off >> 2 ] = VGM_WORD_VALID; |
| 1200 | /* Properly aligned, addressible and with valid data. */ |
| 1201 | return; |
| 1202 | slow8: |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1203 | mc_fpu_write_check_SLOWLY ( addr, 8 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1204 | return; |
| 1205 | } |
| 1206 | |
| 1207 | /* Can't be bothered to huff'n'puff to make these (allegedly) rare |
| 1208 | cases go quickly. */ |
| 1209 | if (size == 2) { |
| 1210 | PROF_EVENT(88); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1211 | mc_fpu_write_check_SLOWLY ( addr, 2 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1212 | return; |
| 1213 | } |
| 1214 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1215 | if (size == 10 || size == 28 || size == 108) { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1216 | PROF_EVENT(89); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1217 | mc_fpu_write_check_SLOWLY ( addr, size ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1218 | return; |
| 1219 | } |
| 1220 | |
| 1221 | VG_(printf)("size is %d\n", size); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1222 | VG_(skin_panic)("MC_(fpu_write_check): unhandled size"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1223 | # endif |
| 1224 | } |
| 1225 | |
| 1226 | |
| 1227 | /* --------------------------------------------------------------------- |
| 1228 | Slow, general cases for FPU load and store checks. |
| 1229 | ------------------------------------------------------------------ */ |
| 1230 | |
| 1231 | /* Generic version. Test for both addr and value errors, but if |
| 1232 | there's an addr error, don't report a value error even if it |
| 1233 | exists. */ |
| 1234 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1235 | void mc_fpu_read_check_SLOWLY ( Addr addr, Int size ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1236 | { |
| 1237 | Int i; |
| 1238 | Bool aerr = False; |
| 1239 | Bool verr = False; |
| 1240 | PROF_EVENT(90); |
| 1241 | for (i = 0; i < size; i++) { |
| 1242 | PROF_EVENT(91); |
| 1243 | if (get_abit(addr+i) != VGM_BIT_VALID) |
| 1244 | aerr = True; |
| 1245 | if (get_vbyte(addr+i) != VGM_BYTE_VALID) |
| 1246 | verr = True; |
| 1247 | } |
| 1248 | |
| 1249 | if (aerr) { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1250 | MC_(record_address_error)( addr, size, False ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1251 | } else { |
| 1252 | if (verr) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1253 | MC_(record_value_error)( size ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1254 | } |
| 1255 | } |
| 1256 | |
| 1257 | |
| 1258 | /* Generic version. Test for addr errors. Valid addresses are |
| 1259 | given valid values, and invalid addresses invalid values. */ |
| 1260 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1261 | void mc_fpu_write_check_SLOWLY ( Addr addr, Int size ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1262 | { |
| 1263 | Int i; |
| 1264 | Addr a_here; |
| 1265 | Bool a_ok; |
| 1266 | Bool aerr = False; |
| 1267 | PROF_EVENT(92); |
| 1268 | for (i = 0; i < size; i++) { |
| 1269 | PROF_EVENT(93); |
| 1270 | a_here = addr+i; |
| 1271 | a_ok = get_abit(a_here) == VGM_BIT_VALID; |
| 1272 | if (a_ok) { |
| 1273 | set_vbyte(a_here, VGM_BYTE_VALID); |
| 1274 | } else { |
| 1275 | set_vbyte(a_here, VGM_BYTE_INVALID); |
| 1276 | aerr = True; |
| 1277 | } |
| 1278 | } |
| 1279 | if (aerr) { |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1280 | MC_(record_address_error)( addr, size, True ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1281 | } |
| 1282 | } |
| 1283 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1284 | |
| 1285 | /*------------------------------------------------------------*/ |
| 1286 | /*--- Detecting leaked (unreachable) malloc'd blocks. ---*/ |
| 1287 | /*------------------------------------------------------------*/ |
| 1288 | |
sewardj | a449568 | 2002-10-21 07:29:59 +0000 | [diff] [blame] | 1289 | /* For the memory leak detector, say whether an entire 64k chunk of |
| 1290 | address space is possibly in use, or not. If in doubt return |
| 1291 | True. |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1292 | */ |
sewardj | a449568 | 2002-10-21 07:29:59 +0000 | [diff] [blame] | 1293 | static |
| 1294 | Bool mc_is_valid_64k_chunk ( UInt chunk_number ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1295 | { |
sewardj | a449568 | 2002-10-21 07:29:59 +0000 | [diff] [blame] | 1296 | sk_assert(chunk_number >= 0 && chunk_number < 65536); |
| 1297 | if (IS_DISTINGUISHED_SM(primary_map[chunk_number])) { |
| 1298 | /* Definitely not in use. */ |
| 1299 | return False; |
| 1300 | } else { |
| 1301 | return True; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1302 | } |
| 1303 | } |
| 1304 | |
| 1305 | |
sewardj | a449568 | 2002-10-21 07:29:59 +0000 | [diff] [blame] | 1306 | /* For the memory leak detector, say whether or not a given word |
| 1307 | address is to be regarded as valid. */ |
| 1308 | static |
| 1309 | Bool mc_is_valid_address ( Addr a ) |
| 1310 | { |
| 1311 | UInt vbytes; |
| 1312 | UChar abits; |
| 1313 | sk_assert(IS_ALIGNED4_ADDR(a)); |
| 1314 | abits = get_abits4_ALIGNED(a); |
| 1315 | vbytes = get_vbytes4_ALIGNED(a); |
| 1316 | if (abits == VGM_NIBBLE_VALID && vbytes == VGM_WORD_VALID) { |
| 1317 | return True; |
| 1318 | } else { |
| 1319 | return False; |
| 1320 | } |
| 1321 | } |
| 1322 | |
| 1323 | |
| 1324 | /* Leak detector for this skin. We don't actually do anything, merely |
| 1325 | run the generic leak detector with suitable parameters for this |
| 1326 | skin. */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1327 | void MC_(detect_memory_leaks) ( void ) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1328 | { |
sewardj | a449568 | 2002-10-21 07:29:59 +0000 | [diff] [blame] | 1329 | VG_(generic_detect_memory_leaks) ( |
| 1330 | mc_is_valid_64k_chunk, |
| 1331 | mc_is_valid_address, |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1332 | MC_(get_where), |
| 1333 | MC_(clo_leak_resolution), |
sewardj | 99aac97 | 2002-12-26 01:53:45 +0000 | [diff] [blame^] | 1334 | MC_(clo_show_reachable), |
| 1335 | (UInt)LeakSupp |
sewardj | a449568 | 2002-10-21 07:29:59 +0000 | [diff] [blame] | 1336 | ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1337 | } |
| 1338 | |
| 1339 | |
| 1340 | /* --------------------------------------------------------------------- |
| 1341 | Sanity check machinery (permanently engaged). |
| 1342 | ------------------------------------------------------------------ */ |
| 1343 | |
| 1344 | /* Check that nobody has spuriously claimed that the first or last 16 |
| 1345 | pages (64 KB) of address space have become accessible. Failure of |
| 1346 | the following do not per se indicate an internal consistency |
| 1347 | problem, but they are so likely to that we really want to know |
| 1348 | about it if so. */ |
| 1349 | |
| 1350 | Bool SK_(cheap_sanity_check) ( void ) |
| 1351 | { |
| 1352 | if (IS_DISTINGUISHED_SM(primary_map[0]) && |
| 1353 | IS_DISTINGUISHED_SM(primary_map[65535])) |
| 1354 | return True; |
| 1355 | else |
| 1356 | return False; |
| 1357 | } |
| 1358 | |
| 1359 | Bool SK_(expensive_sanity_check) ( void ) |
| 1360 | { |
| 1361 | Int i; |
| 1362 | |
| 1363 | /* Make sure nobody changed the distinguished secondary. */ |
| 1364 | for (i = 0; i < 8192; i++) |
| 1365 | if (distinguished_secondary_map.abits[i] != VGM_BYTE_INVALID) |
| 1366 | return False; |
| 1367 | |
| 1368 | for (i = 0; i < 65536; i++) |
| 1369 | if (distinguished_secondary_map.vbyte[i] != VGM_BYTE_INVALID) |
| 1370 | return False; |
| 1371 | |
| 1372 | /* Make sure that the upper 3/4 of the primary map hasn't |
| 1373 | been messed with. */ |
| 1374 | for (i = 65536; i < 262144; i++) |
| 1375 | if (primary_map[i] != & distinguished_secondary_map) |
| 1376 | return False; |
| 1377 | |
| 1378 | return True; |
| 1379 | } |
| 1380 | |
| 1381 | /* --------------------------------------------------------------------- |
| 1382 | Debugging machinery (turn on to debug). Something of a mess. |
| 1383 | ------------------------------------------------------------------ */ |
| 1384 | |
| 1385 | #if 0 |
| 1386 | /* Print the value tags on the 8 integer registers & flag reg. */ |
| 1387 | |
| 1388 | static void uint_to_bits ( UInt x, Char* str ) |
| 1389 | { |
| 1390 | Int i; |
| 1391 | Int w = 0; |
| 1392 | /* str must point to a space of at least 36 bytes. */ |
| 1393 | for (i = 31; i >= 0; i--) { |
| 1394 | str[w++] = (x & ( ((UInt)1) << i)) ? '1' : '0'; |
| 1395 | if (i == 24 || i == 16 || i == 8) |
| 1396 | str[w++] = ' '; |
| 1397 | } |
| 1398 | str[w++] = 0; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 1399 | sk_assert(w == 36); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1400 | } |
| 1401 | |
| 1402 | /* Caution! Not vthread-safe; looks in VG_(baseBlock), not the thread |
| 1403 | state table. */ |
| 1404 | |
| 1405 | static void vg_show_reg_tags ( void ) |
| 1406 | { |
| 1407 | Char buf1[36]; |
| 1408 | Char buf2[36]; |
| 1409 | UInt z_eax, z_ebx, z_ecx, z_edx, |
| 1410 | z_esi, z_edi, z_ebp, z_esp, z_eflags; |
| 1411 | |
| 1412 | z_eax = VG_(baseBlock)[VGOFF_(sh_eax)]; |
| 1413 | z_ebx = VG_(baseBlock)[VGOFF_(sh_ebx)]; |
| 1414 | z_ecx = VG_(baseBlock)[VGOFF_(sh_ecx)]; |
| 1415 | z_edx = VG_(baseBlock)[VGOFF_(sh_edx)]; |
| 1416 | z_esi = VG_(baseBlock)[VGOFF_(sh_esi)]; |
| 1417 | z_edi = VG_(baseBlock)[VGOFF_(sh_edi)]; |
| 1418 | z_ebp = VG_(baseBlock)[VGOFF_(sh_ebp)]; |
| 1419 | z_esp = VG_(baseBlock)[VGOFF_(sh_esp)]; |
| 1420 | z_eflags = VG_(baseBlock)[VGOFF_(sh_eflags)]; |
| 1421 | |
| 1422 | uint_to_bits(z_eflags, buf1); |
njn | 9b6d34e | 2002-10-15 08:48:08 +0000 | [diff] [blame] | 1423 | VG_(message)(Vg_DebugMsg, "efl %s\n", buf1); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1424 | |
| 1425 | uint_to_bits(z_eax, buf1); |
| 1426 | uint_to_bits(z_ebx, buf2); |
| 1427 | VG_(message)(Vg_DebugMsg, "eax %s ebx %s\n", buf1, buf2); |
| 1428 | |
| 1429 | uint_to_bits(z_ecx, buf1); |
| 1430 | uint_to_bits(z_edx, buf2); |
| 1431 | VG_(message)(Vg_DebugMsg, "ecx %s edx %s\n", buf1, buf2); |
| 1432 | |
| 1433 | uint_to_bits(z_esi, buf1); |
| 1434 | uint_to_bits(z_edi, buf2); |
| 1435 | VG_(message)(Vg_DebugMsg, "esi %s edi %s\n", buf1, buf2); |
| 1436 | |
| 1437 | uint_to_bits(z_ebp, buf1); |
| 1438 | uint_to_bits(z_esp, buf2); |
| 1439 | VG_(message)(Vg_DebugMsg, "ebp %s esp %s\n", buf1, buf2); |
| 1440 | } |
| 1441 | |
| 1442 | |
| 1443 | /* For debugging only. Scan the address space and touch all allegedly |
| 1444 | addressible words. Useful for establishing where Valgrind's idea of |
| 1445 | addressibility has diverged from what the kernel believes. */ |
| 1446 | |
| 1447 | static |
| 1448 | void zzzmemscan_notify_word ( Addr a, UInt w ) |
| 1449 | { |
| 1450 | } |
| 1451 | |
| 1452 | void zzzmemscan ( void ) |
| 1453 | { |
| 1454 | Int n_notifies |
| 1455 | = VG_(scan_all_valid_memory)( zzzmemscan_notify_word ); |
| 1456 | VG_(printf)("zzzmemscan: n_bytes = %d\n", 4 * n_notifies ); |
| 1457 | } |
| 1458 | #endif |
| 1459 | |
| 1460 | |
| 1461 | |
| 1462 | |
| 1463 | #if 0 |
| 1464 | static Int zzz = 0; |
| 1465 | |
| 1466 | void show_bb ( Addr eip_next ) |
| 1467 | { |
| 1468 | VG_(printf)("[%4d] ", zzz); |
| 1469 | vg_show_reg_tags( &VG_(m_shadow ); |
| 1470 | VG_(translate) ( eip_next, NULL, NULL, NULL ); |
| 1471 | } |
| 1472 | #endif /* 0 */ |
| 1473 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1474 | |
| 1475 | /*------------------------------------------------------------*/ |
| 1476 | /*--- Setup ---*/ |
| 1477 | /*------------------------------------------------------------*/ |
| 1478 | |
| 1479 | void SK_(written_shadow_regs_values)( UInt* gen_reg_value, UInt* eflags_value ) |
| 1480 | { |
| 1481 | *gen_reg_value = VGM_WORD_VALID; |
| 1482 | *eflags_value = VGM_EFLAGS_VALID; |
| 1483 | } |
| 1484 | |
| 1485 | Bool SK_(process_cmd_line_option)(Char* arg) |
| 1486 | { |
| 1487 | # define STREQ(s1,s2) (0==VG_(strcmp_ws)((s1),(s2))) |
| 1488 | # define STREQN(nn,s1,s2) (0==VG_(strncmp_ws)((s1),(s2),(nn))) |
| 1489 | |
sewardj | 5164748 | 2002-12-15 01:42:22 +0000 | [diff] [blame] | 1490 | if (STREQ(arg, "--avoid-strlen-errors=yes")) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1491 | MC_(clo_avoid_strlen_errors) = True; |
sewardj | 8ec2cfc | 2002-10-13 00:57:26 +0000 | [diff] [blame] | 1492 | else if (STREQ(arg, "--avoid-strlen-errors=no")) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1493 | MC_(clo_avoid_strlen_errors) = False; |
sewardj | 8ec2cfc | 2002-10-13 00:57:26 +0000 | [diff] [blame] | 1494 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1495 | else |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1496 | return MC_(process_common_cmd_line_option)(arg); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1497 | |
| 1498 | return True; |
| 1499 | |
| 1500 | #undef STREQ |
| 1501 | #undef STREQN |
| 1502 | } |
| 1503 | |
| 1504 | Char* SK_(usage)(void) |
| 1505 | { |
| 1506 | return |
| 1507 | " --partial-loads-ok=no|yes too hard to explain here; see manual [yes]\n" |
| 1508 | " --freelist-vol=<number> volume of freed blocks queue [1000000]\n" |
| 1509 | " --leak-check=no|yes search for memory leaks at exit? [no]\n" |
| 1510 | " --leak-resolution=low|med|high\n" |
| 1511 | " amount of bt merging in leak check [low]\n" |
| 1512 | " --show-reachable=no|yes show reachable blocks in leak check? [no]\n" |
| 1513 | " --workaround-gcc296-bugs=no|yes self explanatory [no]\n" |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1514 | "\n" |
sewardj | 8ec2cfc | 2002-10-13 00:57:26 +0000 | [diff] [blame] | 1515 | " --cleanup=no|yes improve after instrumentation? [yes]\n" |
| 1516 | " --avoid-strlen-errors=no|yes suppress errs from inlined strlen [yes]\n"; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1517 | } |
| 1518 | |
| 1519 | |
| 1520 | /*------------------------------------------------------------*/ |
| 1521 | /*--- Setup ---*/ |
| 1522 | /*------------------------------------------------------------*/ |
| 1523 | |
njn | 810086f | 2002-11-14 12:42:47 +0000 | [diff] [blame] | 1524 | void SK_(pre_clo_init)(void) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1525 | { |
njn | 810086f | 2002-11-14 12:42:47 +0000 | [diff] [blame] | 1526 | VG_(details_name) ("Memcheck"); |
| 1527 | VG_(details_version) (NULL); |
| 1528 | VG_(details_description) ("a.k.a. Valgrind, a memory error detector"); |
| 1529 | VG_(details_copyright_author)( |
| 1530 | "Copyright (C) 2002, and GNU GPL'd, by Julian Seward."); |
| 1531 | VG_(details_bug_reports_to) ("jseward@acm.org"); |
sewardj | 78210aa | 2002-12-01 02:55:46 +0000 | [diff] [blame] | 1532 | VG_(details_avg_translation_sizeB) ( 228 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1533 | |
njn | 810086f | 2002-11-14 12:42:47 +0000 | [diff] [blame] | 1534 | VG_(needs_core_errors) (); |
| 1535 | VG_(needs_skin_errors) (); |
| 1536 | VG_(needs_libc_freeres) (); |
| 1537 | VG_(needs_sizeof_shadow_block) ( 1 ); |
| 1538 | VG_(needs_shadow_regs) (); |
| 1539 | VG_(needs_command_line_options)(); |
| 1540 | VG_(needs_client_requests) (); |
| 1541 | VG_(needs_extended_UCode) (); |
| 1542 | VG_(needs_syscall_wrapper) (); |
| 1543 | VG_(needs_alternative_free) (); |
| 1544 | VG_(needs_sanity_checks) (); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1545 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1546 | VG_(track_new_mem_startup) ( & mc_new_mem_startup ); |
| 1547 | VG_(track_new_mem_heap) ( & mc_new_mem_heap ); |
| 1548 | VG_(track_new_mem_stack) ( & MC_(make_writable) ); |
| 1549 | VG_(track_new_mem_stack_aligned)( & mc_make_writable_aligned ); |
| 1550 | VG_(track_new_mem_stack_signal) ( & MC_(make_writable) ); |
| 1551 | VG_(track_new_mem_brk) ( & MC_(make_writable) ); |
| 1552 | VG_(track_new_mem_mmap) ( & mc_set_perms ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1553 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1554 | VG_(track_copy_mem_heap) ( & mc_copy_address_range_state ); |
| 1555 | VG_(track_copy_mem_remap) ( & mc_copy_address_range_state ); |
| 1556 | VG_(track_change_mem_mprotect) ( & mc_set_perms ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1557 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1558 | VG_(track_ban_mem_heap) ( & MC_(make_noaccess) ); |
| 1559 | VG_(track_ban_mem_stack) ( & MC_(make_noaccess) ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1560 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1561 | VG_(track_die_mem_heap) ( & MC_(make_noaccess) ); |
| 1562 | VG_(track_die_mem_stack) ( & MC_(make_noaccess) ); |
| 1563 | VG_(track_die_mem_stack_aligned)( & mc_make_noaccess_aligned ); |
| 1564 | VG_(track_die_mem_stack_signal) ( & MC_(make_noaccess) ); |
| 1565 | VG_(track_die_mem_brk) ( & MC_(make_noaccess) ); |
| 1566 | VG_(track_die_mem_munmap) ( & MC_(make_noaccess) ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1567 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1568 | VG_(track_bad_free) ( & MC_(record_free_error) ); |
| 1569 | VG_(track_mismatched_free) ( & MC_(record_freemismatch_error) ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1570 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1571 | VG_(track_pre_mem_read) ( & mc_check_is_readable ); |
| 1572 | VG_(track_pre_mem_read_asciiz) ( & mc_check_is_readable_asciiz ); |
| 1573 | VG_(track_pre_mem_write) ( & mc_check_is_writable ); |
| 1574 | VG_(track_post_mem_write) ( & MC_(make_readable) ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1575 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1576 | VG_(register_compact_helper)((Addr) & MC_(helper_value_check4_fail)); |
| 1577 | VG_(register_compact_helper)((Addr) & MC_(helper_value_check0_fail)); |
| 1578 | VG_(register_compact_helper)((Addr) & MC_(helper_value_check2_fail)); |
| 1579 | VG_(register_compact_helper)((Addr) & MC_(helperc_STOREV4)); |
| 1580 | VG_(register_compact_helper)((Addr) & MC_(helperc_STOREV1)); |
| 1581 | VG_(register_compact_helper)((Addr) & MC_(helperc_LOADV4)); |
| 1582 | VG_(register_compact_helper)((Addr) & MC_(helperc_LOADV1)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1583 | |
njn | d04b7c6 | 2002-10-03 14:05:52 +0000 | [diff] [blame] | 1584 | /* These two made non-compact because 2-byte transactions are rare. */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1585 | VG_(register_noncompact_helper)((Addr) & MC_(helperc_STOREV2)); |
| 1586 | VG_(register_noncompact_helper)((Addr) & MC_(helperc_LOADV2)); |
| 1587 | VG_(register_noncompact_helper)((Addr) & MC_(fpu_write_check)); |
| 1588 | VG_(register_noncompact_helper)((Addr) & MC_(fpu_read_check)); |
| 1589 | VG_(register_noncompact_helper)((Addr) & MC_(helper_value_check1_fail)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1590 | |
| 1591 | VGP_(register_profile_event) ( VgpSetMem, "set-mem-perms" ); |
| 1592 | VGP_(register_profile_event) ( VgpCheckMem, "check-mem-perms" ); |
njn | d04b7c6 | 2002-10-03 14:05:52 +0000 | [diff] [blame] | 1593 | |
| 1594 | init_shadow_memory(); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame] | 1595 | MC_(init_prof_mem)(); |
| 1596 | } |
| 1597 | |
| 1598 | void SK_(post_clo_init) ( void ) |
| 1599 | { |
| 1600 | } |
| 1601 | |
| 1602 | void SK_(fini) ( void ) |
| 1603 | { |
| 1604 | VG_(print_malloc_stats)(); |
| 1605 | |
| 1606 | if (VG_(clo_verbosity) == 1) { |
| 1607 | if (!MC_(clo_leak_check)) |
| 1608 | VG_(message)(Vg_UserMsg, |
| 1609 | "For a detailed leak analysis, rerun with: --leak-check=yes"); |
| 1610 | |
| 1611 | VG_(message)(Vg_UserMsg, |
| 1612 | "For counts of detected errors, rerun with: -v"); |
| 1613 | } |
| 1614 | if (MC_(clo_leak_check)) MC_(detect_memory_leaks)(); |
| 1615 | |
| 1616 | MC_(done_prof_mem)(); |
| 1617 | |
| 1618 | if (0) { |
| 1619 | VG_(message)(Vg_DebugMsg, |
| 1620 | "------ Valgrind's client block stats follow ---------------" ); |
| 1621 | MC_(show_client_block_stats)(); |
| 1622 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1623 | } |
| 1624 | |
| 1625 | /*--------------------------------------------------------------------*/ |
njn25 | cac76cb | 2002-09-23 11:21:57 +0000 | [diff] [blame] | 1626 | /*--- end mc_main.c ---*/ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1627 | /*--------------------------------------------------------------------*/ |