sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1 | |
| 2 | /*--------------------------------------------------------------------*/ |
njn | c953984 | 2002-10-02 13:26:35 +0000 | [diff] [blame] | 3 | /*--- For when the client advises Valgrind about memory ---*/ |
| 4 | /*--- permissions. ---*/ |
njn25 | cac76cb | 2002-09-23 11:21:57 +0000 | [diff] [blame] | 5 | /*--- mc_clientreqs.c ---*/ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +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. |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 11 | |
| 12 | Copyright (C) 2000-2002 Julian Seward |
| 13 | jseward@acm.org |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 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 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 30 | The GNU General Public License is contained in the file COPYING. |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 31 | */ |
| 32 | |
njn25 | cac76cb | 2002-09-23 11:21:57 +0000 | [diff] [blame] | 33 | #include "mc_include.h" |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 34 | |
njn25 | cac76cb | 2002-09-23 11:21:57 +0000 | [diff] [blame] | 35 | #include "memcheck.h" /* for VG_USERREQ__* */ |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 36 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 37 | |
| 38 | /*------------------------------------------------------------*/ |
| 39 | /*--- General client block management. ---*/ |
| 40 | /*------------------------------------------------------------*/ |
| 41 | |
| 42 | /* This is managed as an expanding array of client block descriptors. |
| 43 | Indices of live descriptors are issued to the client, so it can ask |
| 44 | to free them later. Therefore we cannot slide live entries down |
| 45 | over dead ones. Instead we must use free/inuse flags and scan for |
| 46 | an empty slot at allocation time. This in turn means allocation is |
| 47 | relatively expensive, so we hope this does not happen too often. |
| 48 | */ |
| 49 | |
| 50 | typedef |
| 51 | enum { CG_NotInUse, CG_NoAccess, CG_Writable, CG_Readable } |
| 52 | CGenBlockKind; |
| 53 | |
| 54 | typedef |
| 55 | struct { |
| 56 | Addr start; |
| 57 | UInt size; |
| 58 | ExeContext* where; |
| 59 | CGenBlockKind kind; |
| 60 | } |
| 61 | CGenBlock; |
| 62 | |
| 63 | /* This subsystem is self-initialising. */ |
| 64 | static UInt vg_cgb_size = 0; |
| 65 | static UInt vg_cgb_used = 0; |
| 66 | static CGenBlock* vg_cgbs = NULL; |
| 67 | |
| 68 | /* Stats for this subsystem. */ |
| 69 | static UInt vg_cgb_used_MAX = 0; /* Max in use. */ |
| 70 | static UInt vg_cgb_allocs = 0; /* Number of allocs. */ |
| 71 | static UInt vg_cgb_discards = 0; /* Number of discards. */ |
| 72 | static UInt vg_cgb_search = 0; /* Number of searches. */ |
| 73 | |
| 74 | |
| 75 | static |
| 76 | Int vg_alloc_client_block ( void ) |
| 77 | { |
| 78 | Int i, sz_new; |
| 79 | CGenBlock* cgbs_new; |
| 80 | |
| 81 | vg_cgb_allocs++; |
| 82 | |
| 83 | for (i = 0; i < vg_cgb_used; i++) { |
| 84 | vg_cgb_search++; |
| 85 | if (vg_cgbs[i].kind == CG_NotInUse) |
| 86 | return i; |
| 87 | } |
| 88 | |
| 89 | /* Not found. Try to allocate one at the end. */ |
| 90 | if (vg_cgb_used < vg_cgb_size) { |
| 91 | vg_cgb_used++; |
| 92 | return vg_cgb_used-1; |
| 93 | } |
| 94 | |
| 95 | /* Ok, we have to allocate a new one. */ |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 96 | sk_assert(vg_cgb_used == vg_cgb_size); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 97 | sz_new = (vg_cgbs == NULL) ? 10 : (2 * vg_cgb_size); |
| 98 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 99 | cgbs_new = VG_(malloc)( sz_new * sizeof(CGenBlock) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 100 | for (i = 0; i < vg_cgb_used; i++) |
| 101 | cgbs_new[i] = vg_cgbs[i]; |
| 102 | |
| 103 | if (vg_cgbs != NULL) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 104 | VG_(free)( vg_cgbs ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 105 | vg_cgbs = cgbs_new; |
| 106 | |
| 107 | vg_cgb_size = sz_new; |
| 108 | vg_cgb_used++; |
| 109 | if (vg_cgb_used > vg_cgb_used_MAX) |
| 110 | vg_cgb_used_MAX = vg_cgb_used; |
| 111 | return vg_cgb_used-1; |
| 112 | } |
| 113 | |
| 114 | |
| 115 | /*------------------------------------------------------------*/ |
| 116 | /*--- Stack block management. ---*/ |
| 117 | /*------------------------------------------------------------*/ |
| 118 | |
| 119 | /* This is managed as an expanding array of CStackBlocks. They are |
| 120 | packed up against the left-hand end of the array, with no holes. |
| 121 | They are kept sorted by the start field, with the [0] having the |
| 122 | highest value. This means it's pretty cheap to put new blocks at |
| 123 | the end, corresponding to stack pushes, since the additions put |
| 124 | blocks on in what is presumably fairly close to strictly descending |
| 125 | order. If this assumption doesn't hold the performance |
| 126 | consequences will be horrible. |
| 127 | |
| 128 | When the client's %ESP jumps back upwards as the result of a RET |
| 129 | insn, we shrink the array backwards from the end, in a |
| 130 | guaranteed-cheap linear scan. |
| 131 | */ |
| 132 | |
| 133 | typedef |
| 134 | struct { |
| 135 | Addr start; |
| 136 | UInt size; |
| 137 | ExeContext* where; |
| 138 | } |
| 139 | CStackBlock; |
| 140 | |
| 141 | /* This subsystem is self-initialising. */ |
| 142 | static UInt vg_csb_size = 0; |
| 143 | static UInt vg_csb_used = 0; |
| 144 | static CStackBlock* vg_csbs = NULL; |
| 145 | |
| 146 | /* Stats for this subsystem. */ |
| 147 | static UInt vg_csb_used_MAX = 0; /* Max in use. */ |
| 148 | static UInt vg_csb_allocs = 0; /* Number of allocs. */ |
| 149 | static UInt vg_csb_discards = 0; /* Number of discards. */ |
| 150 | static UInt vg_csb_swaps = 0; /* Number of searches. */ |
| 151 | |
| 152 | static |
sewardj | 8c82451 | 2002-04-14 04:16:48 +0000 | [diff] [blame] | 153 | void vg_add_client_stack_block ( ThreadState* tst, Addr aa, UInt sz ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 154 | { |
| 155 | UInt i, sz_new; |
| 156 | CStackBlock* csbs_new; |
| 157 | vg_csb_allocs++; |
| 158 | |
| 159 | /* Ensure there is space for a new block. */ |
| 160 | |
| 161 | if (vg_csb_used >= vg_csb_size) { |
| 162 | |
| 163 | /* No; we have to expand the array. */ |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 164 | sk_assert(vg_csb_used == vg_csb_size); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 165 | |
| 166 | sz_new = (vg_csbs == NULL) ? 10 : (2 * vg_csb_size); |
| 167 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 168 | csbs_new = VG_(malloc)( sz_new * sizeof(CStackBlock) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 169 | for (i = 0; i < vg_csb_used; i++) |
| 170 | csbs_new[i] = vg_csbs[i]; |
| 171 | |
| 172 | if (vg_csbs != NULL) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 173 | VG_(free)( vg_csbs ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 174 | vg_csbs = csbs_new; |
| 175 | |
| 176 | vg_csb_size = sz_new; |
| 177 | } |
| 178 | |
| 179 | /* Ok, we can use [vg_csb_used]. */ |
| 180 | vg_csbs[vg_csb_used].start = aa; |
| 181 | vg_csbs[vg_csb_used].size = sz; |
sewardj | 8c82451 | 2002-04-14 04:16:48 +0000 | [diff] [blame] | 182 | /* Actually running a thread at this point. */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 183 | vg_csbs[vg_csb_used].where = VG_(get_ExeContext) ( tst ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 184 | vg_csb_used++; |
| 185 | |
| 186 | if (vg_csb_used > vg_csb_used_MAX) |
| 187 | vg_csb_used_MAX = vg_csb_used; |
| 188 | |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 189 | sk_assert(vg_csb_used <= vg_csb_size); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 190 | |
| 191 | /* VG_(printf)("acsb %p %d\n", aa, sz); */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame^] | 192 | MC_(make_noaccess) ( aa, sz ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 193 | |
| 194 | /* And make sure that they are in descending order of address. */ |
| 195 | i = vg_csb_used; |
| 196 | while (i > 0 && vg_csbs[i-1].start < vg_csbs[i].start) { |
| 197 | CStackBlock tmp = vg_csbs[i-1]; |
| 198 | vg_csbs[i-1] = vg_csbs[i]; |
| 199 | vg_csbs[i] = tmp; |
| 200 | vg_csb_swaps++; |
| 201 | } |
| 202 | |
| 203 | # if 1 |
| 204 | for (i = 1; i < vg_csb_used; i++) |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 205 | sk_assert(vg_csbs[i-1].start >= vg_csbs[i].start); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 206 | # endif |
| 207 | } |
| 208 | |
| 209 | |
| 210 | /*------------------------------------------------------------*/ |
| 211 | /*--- Externally visible functions. ---*/ |
| 212 | /*------------------------------------------------------------*/ |
| 213 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame^] | 214 | void MC_(show_client_block_stats) ( void ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 215 | { |
| 216 | VG_(message)(Vg_DebugMsg, |
| 217 | "general CBs: %d allocs, %d discards, %d maxinuse, %d search", |
| 218 | vg_cgb_allocs, vg_cgb_discards, vg_cgb_used_MAX, vg_cgb_search |
| 219 | ); |
| 220 | VG_(message)(Vg_DebugMsg, |
| 221 | " stack CBs: %d allocs, %d discards, %d maxinuse, %d swap", |
| 222 | vg_csb_allocs, vg_csb_discards, vg_csb_used_MAX, vg_csb_swaps |
| 223 | ); |
| 224 | } |
| 225 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame^] | 226 | Bool MC_(client_perm_maybe_describe)( Addr a, AddrInfo* ai ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 227 | { |
| 228 | Int i; |
| 229 | /* VG_(printf)("try to identify %d\n", a); */ |
| 230 | |
| 231 | /* First see if it's a stack block. We do two passes, one exact |
| 232 | and one with a bit of slop, so as to try and get the most |
| 233 | accurate fix. */ |
| 234 | for (i = 0; i < vg_csb_used; i++) { |
| 235 | if (vg_csbs[i].start <= a |
| 236 | && a < vg_csbs[i].start + vg_csbs[i].size) { |
| 237 | ai->akind = UserS; |
| 238 | ai->blksize = vg_csbs[i].size; |
| 239 | ai->rwoffset = (Int)(a) - (Int)(vg_csbs[i].start); |
| 240 | ai->lastchange = vg_csbs[i].where; |
| 241 | return True; |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | /* No exact match on the stack. Re-do the stack scan with a bit of |
| 246 | slop. */ |
| 247 | for (i = 0; i < vg_csb_used; i++) { |
| 248 | if (vg_csbs[i].start - 8 <= a |
| 249 | && a < vg_csbs[i].start + vg_csbs[i].size + 8) { |
| 250 | ai->akind = UserS; |
| 251 | ai->blksize = vg_csbs[i].size; |
| 252 | ai->rwoffset = (Int)(a) - (Int)(vg_csbs[i].start); |
| 253 | ai->lastchange = vg_csbs[i].where; |
| 254 | return True; |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | /* No match on the stack. Perhaps it's a general block ? */ |
| 259 | for (i = 0; i < vg_cgb_used; i++) { |
| 260 | if (vg_cgbs[i].kind == CG_NotInUse) |
| 261 | continue; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 262 | if (VG_(addr_is_in_block)(a, vg_cgbs[i].start, vg_cgbs[i].size)) { |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 263 | ai->akind = UserG; |
| 264 | ai->blksize = vg_cgbs[i].size; |
| 265 | ai->rwoffset = (Int)(a) - (Int)(vg_cgbs[i].start); |
| 266 | ai->lastchange = vg_cgbs[i].where; |
| 267 | return True; |
| 268 | } |
| 269 | } |
| 270 | return False; |
| 271 | } |
| 272 | |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame^] | 273 | static __attribute__ ((unused)) |
| 274 | void delete_client_stack_blocks_following_ESP_change ( void ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 275 | { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 276 | Addr newESP = VG_(get_stack_pointer)(); |
| 277 | |
sewardj | c7529c3 | 2002-04-16 01:55:18 +0000 | [diff] [blame] | 278 | while (vg_csb_used > 0 |
| 279 | && vg_csbs[vg_csb_used-1].start + vg_csbs[vg_csb_used-1].size |
| 280 | <= newESP) { |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 281 | vg_csb_used--; |
| 282 | vg_csb_discards++; |
| 283 | if (VG_(clo_verbosity) > 2) |
| 284 | VG_(printf)("discarding stack block %p for %d\n", |
sewardj | 9a199dc | 2002-04-14 13:01:38 +0000 | [diff] [blame] | 285 | (void*)vg_csbs[vg_csb_used].start, |
| 286 | vg_csbs[vg_csb_used].size); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 287 | } |
| 288 | } |
| 289 | |
| 290 | |
sewardj | 3404251 | 2002-10-22 04:14:35 +0000 | [diff] [blame] | 291 | Bool SK_(handle_client_request) ( ThreadState* tst, UInt* arg_block, UInt *ret ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 292 | { |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 293 | Int i; |
| 294 | Bool ok; |
| 295 | Addr bad_addr; |
| 296 | UInt* arg = arg_block; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 297 | |
sewardj | 3404251 | 2002-10-22 04:14:35 +0000 | [diff] [blame] | 298 | if (!VG_IS_SKIN_USERREQ('M','C',arg[0])) |
| 299 | return False; |
| 300 | |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 301 | switch (arg[0]) { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 302 | case VG_USERREQ__CHECK_WRITABLE: /* check writable */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame^] | 303 | ok = MC_(check_writable) ( arg[1], arg[2], &bad_addr ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 304 | if (!ok) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame^] | 305 | MC_(record_user_error) ( tst, bad_addr, True ); |
sewardj | 3404251 | 2002-10-22 04:14:35 +0000 | [diff] [blame] | 306 | *ret = ok ? (UInt)NULL : bad_addr; |
| 307 | break; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 308 | |
| 309 | case VG_USERREQ__CHECK_READABLE: /* check readable */ |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame^] | 310 | ok = MC_(check_readable) ( arg[1], arg[2], &bad_addr ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 311 | if (!ok) |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame^] | 312 | MC_(record_user_error) ( tst, bad_addr, False ); |
sewardj | 3404251 | 2002-10-22 04:14:35 +0000 | [diff] [blame] | 313 | *ret = ok ? (UInt)NULL : bad_addr; |
| 314 | break; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 315 | |
| 316 | case VG_USERREQ__DO_LEAK_CHECK: |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame^] | 317 | MC_(detect_memory_leaks)(); |
sewardj | 3404251 | 2002-10-22 04:14:35 +0000 | [diff] [blame] | 318 | *ret = 0; /* return value is meaningless */ |
| 319 | break; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 320 | |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 321 | case VG_USERREQ__MAKE_NOACCESS: /* make no access */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 322 | i = vg_alloc_client_block(); |
| 323 | /* VG_(printf)("allocated %d %p\n", i, vg_cgbs); */ |
| 324 | vg_cgbs[i].kind = CG_NoAccess; |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 325 | vg_cgbs[i].start = arg[1]; |
| 326 | vg_cgbs[i].size = arg[2]; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 327 | vg_cgbs[i].where = VG_(get_ExeContext) ( tst ); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame^] | 328 | MC_(make_noaccess) ( arg[1], arg[2] ); |
sewardj | 3404251 | 2002-10-22 04:14:35 +0000 | [diff] [blame] | 329 | *ret = i; |
| 330 | break; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 331 | |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 332 | case VG_USERREQ__MAKE_WRITABLE: /* make writable */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 333 | i = vg_alloc_client_block(); |
| 334 | vg_cgbs[i].kind = CG_Writable; |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 335 | vg_cgbs[i].start = arg[1]; |
| 336 | vg_cgbs[i].size = arg[2]; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 337 | vg_cgbs[i].where = VG_(get_ExeContext) ( tst ); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame^] | 338 | MC_(make_writable) ( arg[1], arg[2] ); |
sewardj | 3404251 | 2002-10-22 04:14:35 +0000 | [diff] [blame] | 339 | *ret = i; |
| 340 | break; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 341 | |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 342 | case VG_USERREQ__MAKE_READABLE: /* make readable */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 343 | i = vg_alloc_client_block(); |
| 344 | vg_cgbs[i].kind = CG_Readable; |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 345 | vg_cgbs[i].start = arg[1]; |
| 346 | vg_cgbs[i].size = arg[2]; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 347 | vg_cgbs[i].where = VG_(get_ExeContext) ( tst ); |
njn | 5c004e4 | 2002-11-18 11:04:50 +0000 | [diff] [blame^] | 348 | MC_(make_readable) ( arg[1], arg[2] ); |
sewardj | 3404251 | 2002-10-22 04:14:35 +0000 | [diff] [blame] | 349 | *ret = i; |
| 350 | break; |
| 351 | |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 352 | case VG_USERREQ__DISCARD: /* discard */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 353 | if (vg_cgbs == NULL |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 354 | || arg[2] >= vg_cgb_used || vg_cgbs[arg[2]].kind == CG_NotInUse) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 355 | return 1; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 356 | sk_assert(arg[2] >= 0 && arg[2] < vg_cgb_used); |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 357 | vg_cgbs[arg[2]].kind = CG_NotInUse; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 358 | vg_cgb_discards++; |
sewardj | 3404251 | 2002-10-22 04:14:35 +0000 | [diff] [blame] | 359 | *ret = 0; |
| 360 | break; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 361 | |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 362 | case VG_USERREQ__MAKE_NOACCESS_STACK: /* make noaccess stack block */ |
sewardj | 8c82451 | 2002-04-14 04:16:48 +0000 | [diff] [blame] | 363 | vg_add_client_stack_block ( tst, arg[1], arg[2] ); |
sewardj | 3404251 | 2002-10-22 04:14:35 +0000 | [diff] [blame] | 364 | *ret = 0; |
| 365 | break; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 366 | |
| 367 | default: |
| 368 | VG_(message)(Vg_UserMsg, |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 369 | "Warning: unknown memcheck client request code %d", |
| 370 | arg[0]); |
sewardj | 3404251 | 2002-10-22 04:14:35 +0000 | [diff] [blame] | 371 | return False; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 372 | } |
sewardj | 3404251 | 2002-10-22 04:14:35 +0000 | [diff] [blame] | 373 | return True; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 374 | } |
| 375 | |
| 376 | |
| 377 | /*--------------------------------------------------------------------*/ |
njn25 | cac76cb | 2002-09-23 11:21:57 +0000 | [diff] [blame] | 378 | /*--- end mc_clientreqs.c ---*/ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 379 | /*--------------------------------------------------------------------*/ |