sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1 | |
| 2 | /*--------------------------------------------------------------------*/ |
| 3 | /*--- Management, printing, etc, of errors and suppressions. ---*/ |
| 4 | /*--- mc_errors.c ---*/ |
| 5 | /*--------------------------------------------------------------------*/ |
| 6 | |
| 7 | /* |
| 8 | This file is part of MemCheck, a heavyweight Valgrind tool for |
| 9 | detecting memory errors. |
| 10 | |
sewardj | 9eecbbb | 2010-05-03 21:37:12 +0000 | [diff] [blame] | 11 | Copyright (C) 2000-2010 Julian Seward |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 12 | jseward@acm.org |
| 13 | |
| 14 | This program is free software; you can redistribute it and/or |
| 15 | modify it under the terms of the GNU General Public License as |
| 16 | published by the Free Software Foundation; either version 2 of the |
| 17 | License, or (at your option) any later version. |
| 18 | |
| 19 | This program is distributed in the hope that it will be useful, but |
| 20 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 22 | General Public License for more details. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program; if not, write to the Free Software |
| 26 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 27 | 02111-1307, USA. |
| 28 | |
| 29 | The GNU General Public License is contained in the file COPYING. |
| 30 | */ |
| 31 | |
| 32 | #include "pub_tool_basics.h" |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 33 | #include "pub_tool_hashtable.h" // For mc_include.h |
| 34 | #include "pub_tool_libcbase.h" |
| 35 | #include "pub_tool_libcassert.h" |
| 36 | #include "pub_tool_libcprint.h" |
| 37 | #include "pub_tool_machine.h" |
| 38 | #include "pub_tool_mallocfree.h" |
| 39 | #include "pub_tool_options.h" |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 40 | #include "pub_tool_replacemalloc.h" |
| 41 | #include "pub_tool_tooliface.h" |
| 42 | #include "pub_tool_threadstate.h" |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 43 | #include "pub_tool_debuginfo.h" // VG_(get_dataname_and_offset) |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 44 | #include "pub_tool_xarray.h" |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 45 | |
| 46 | #include "mc_include.h" |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 47 | |
| 48 | |
| 49 | /*------------------------------------------------------------*/ |
| 50 | /*--- Error types ---*/ |
| 51 | /*------------------------------------------------------------*/ |
| 52 | |
| 53 | /* See comment in mc_include.h */ |
| 54 | Bool MC_(any_value_errors) = False; |
| 55 | |
| 56 | |
| 57 | // Different kinds of blocks. |
| 58 | typedef enum { |
| 59 | Block_Mallocd = 111, |
| 60 | Block_Freed, |
| 61 | Block_Mempool, |
| 62 | Block_MempoolChunk, |
| 63 | Block_UserG |
| 64 | } BlockKind; |
| 65 | |
| 66 | /* ------------------ Addresses -------------------- */ |
| 67 | |
| 68 | /* The classification of a faulting address. */ |
| 69 | typedef |
| 70 | enum { |
| 71 | Addr_Undescribed, // as-yet unclassified |
| 72 | Addr_Unknown, // classification yielded nothing useful |
| 73 | Addr_Block, // in malloc'd/free'd block |
| 74 | Addr_Stack, // on a thread's stack |
| 75 | Addr_DataSym, // in a global data sym |
| 76 | Addr_Variable, // variable described by the debug info |
| 77 | Addr_SectKind // last-ditch classification attempt |
| 78 | } |
| 79 | AddrTag; |
| 80 | |
| 81 | typedef |
| 82 | struct _AddrInfo |
| 83 | AddrInfo; |
| 84 | |
| 85 | struct _AddrInfo { |
| 86 | AddrTag tag; |
| 87 | union { |
| 88 | // As-yet unclassified. |
| 89 | struct { } Undescribed; |
| 90 | |
| 91 | // On a stack. |
| 92 | struct { |
| 93 | ThreadId tid; // Which thread's stack? |
| 94 | } Stack; |
| 95 | |
| 96 | // This covers heap blocks (normal and from mempools) and user-defined |
| 97 | // blocks. |
| 98 | struct { |
| 99 | BlockKind block_kind; |
| 100 | Char* block_desc; // "block", "mempool" or user-defined |
| 101 | SizeT block_szB; |
njn | c4431bf | 2009-01-15 21:29:24 +0000 | [diff] [blame] | 102 | PtrdiffT rwoffset; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 103 | ExeContext* lastchange; |
| 104 | } Block; |
| 105 | |
njn | c4431bf | 2009-01-15 21:29:24 +0000 | [diff] [blame] | 106 | // In a global .data symbol. This holds the first 127 chars of |
| 107 | // the variable's name (zero terminated), plus a (memory) offset. |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 108 | struct { |
njn | c4431bf | 2009-01-15 21:29:24 +0000 | [diff] [blame] | 109 | Char name[128]; |
| 110 | PtrdiffT offset; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 111 | } DataSym; |
| 112 | |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 113 | // Is described by Dwarf debug info. XArray*s of HChar. |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 114 | struct { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 115 | XArray* /* of HChar */ descr1; |
| 116 | XArray* /* of HChar */ descr2; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 117 | } Variable; |
| 118 | |
| 119 | // Could only narrow it down to be the PLT/GOT/etc of a given |
| 120 | // object. Better than nothing, perhaps. |
| 121 | struct { |
| 122 | Char objname[128]; |
| 123 | VgSectKind kind; |
| 124 | } SectKind; |
| 125 | |
| 126 | // Classification yielded nothing useful. |
| 127 | struct { } Unknown; |
| 128 | |
| 129 | } Addr; |
| 130 | }; |
| 131 | |
| 132 | /* ------------------ Errors ----------------------- */ |
| 133 | |
| 134 | /* What kind of error it is. */ |
| 135 | typedef |
| 136 | enum { |
| 137 | Err_Value, |
| 138 | Err_Cond, |
| 139 | Err_CoreMem, |
| 140 | Err_Addr, |
| 141 | Err_Jump, |
| 142 | Err_RegParam, |
| 143 | Err_MemParam, |
| 144 | Err_User, |
| 145 | Err_Free, |
| 146 | Err_FreeMismatch, |
| 147 | Err_Overlap, |
| 148 | Err_Leak, |
| 149 | Err_IllegalMempool, |
| 150 | } |
| 151 | MC_ErrorTag; |
| 152 | |
| 153 | |
| 154 | typedef struct _MC_Error MC_Error; |
| 155 | |
| 156 | struct _MC_Error { |
| 157 | // Nb: we don't need the tag here, as it's stored in the Error type! Yuk. |
| 158 | //MC_ErrorTag tag; |
| 159 | |
| 160 | union { |
| 161 | // Use of an undefined value: |
| 162 | // - as a pointer in a load or store |
| 163 | // - as a jump target |
| 164 | struct { |
| 165 | SizeT szB; // size of value in bytes |
| 166 | // Origin info |
| 167 | UInt otag; // origin tag |
| 168 | ExeContext* origin_ec; // filled in later |
| 169 | } Value; |
| 170 | |
| 171 | // Use of an undefined value in a conditional branch or move. |
| 172 | struct { |
| 173 | // Origin info |
| 174 | UInt otag; // origin tag |
| 175 | ExeContext* origin_ec; // filled in later |
| 176 | } Cond; |
| 177 | |
| 178 | // Addressability error in core (signal-handling) operation. |
| 179 | // It would be good to get rid of this error kind, merge it with |
| 180 | // another one somehow. |
| 181 | struct { |
| 182 | } CoreMem; |
| 183 | |
| 184 | // Use of an unaddressable memory location in a load or store. |
| 185 | struct { |
| 186 | Bool isWrite; // read or write? |
| 187 | SizeT szB; // not used for exec (jump) errors |
| 188 | Bool maybe_gcc; // True if just below %esp -- could be a gcc bug |
| 189 | AddrInfo ai; |
| 190 | } Addr; |
| 191 | |
| 192 | // Jump to an unaddressable memory location. |
| 193 | struct { |
| 194 | AddrInfo ai; |
| 195 | } Jump; |
| 196 | |
| 197 | // System call register input contains undefined bytes. |
| 198 | struct { |
| 199 | // Origin info |
| 200 | UInt otag; // origin tag |
| 201 | ExeContext* origin_ec; // filled in later |
| 202 | } RegParam; |
| 203 | |
| 204 | // System call memory input contains undefined/unaddressable bytes |
| 205 | struct { |
| 206 | Bool isAddrErr; // Addressability or definedness error? |
| 207 | AddrInfo ai; |
| 208 | // Origin info |
| 209 | UInt otag; // origin tag |
| 210 | ExeContext* origin_ec; // filled in later |
| 211 | } MemParam; |
| 212 | |
| 213 | // Problem found from a client request like CHECK_MEM_IS_ADDRESSABLE. |
| 214 | struct { |
| 215 | Bool isAddrErr; // Addressability or definedness error? |
| 216 | AddrInfo ai; |
| 217 | // Origin info |
| 218 | UInt otag; // origin tag |
| 219 | ExeContext* origin_ec; // filled in later |
| 220 | } User; |
| 221 | |
| 222 | // Program tried to free() something that's not a heap block (this |
| 223 | // covers double-frees). */ |
| 224 | struct { |
| 225 | AddrInfo ai; |
| 226 | } Free; |
| 227 | |
| 228 | // Program allocates heap block with one function |
| 229 | // (malloc/new/new[]/custom) and deallocates with not the matching one. |
| 230 | struct { |
| 231 | AddrInfo ai; |
| 232 | } FreeMismatch; |
| 233 | |
| 234 | // Call to strcpy, memcpy, etc, with overlapping blocks. |
| 235 | struct { |
| 236 | Addr src; // Source block |
| 237 | Addr dst; // Destination block |
| 238 | Int szB; // Size in bytes; 0 if unused. |
| 239 | } Overlap; |
| 240 | |
| 241 | // A memory leak. |
| 242 | struct { |
| 243 | UInt n_this_record; |
| 244 | UInt n_total_records; |
njn | b7a4e2e | 2009-05-01 00:30:43 +0000 | [diff] [blame] | 245 | LossRecord* lr; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 246 | } Leak; |
| 247 | |
| 248 | // A memory pool error. |
| 249 | struct { |
| 250 | AddrInfo ai; |
| 251 | } IllegalMempool; |
| 252 | |
| 253 | } Err; |
| 254 | }; |
| 255 | |
| 256 | |
| 257 | /*------------------------------------------------------------*/ |
| 258 | /*--- Printing errors ---*/ |
| 259 | /*------------------------------------------------------------*/ |
| 260 | |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 261 | /* This is the "this error is due to be printed shortly; so have a |
| 262 | look at it any print any preamble you want" function. Which, in |
| 263 | Memcheck, we don't use. Hence a no-op. |
| 264 | */ |
| 265 | void MC_(before_pp_Error) ( Error* err ) { |
| 266 | } |
| 267 | |
| 268 | /* Do a printf-style operation on either the XML or normal output |
| 269 | channel, depending on the setting of VG_(clo_xml). |
| 270 | */ |
| 271 | static void emit_WRK ( HChar* format, va_list vargs ) |
| 272 | { |
| 273 | if (VG_(clo_xml)) { |
| 274 | VG_(vprintf_xml)(format, vargs); |
| 275 | } else { |
| 276 | VG_(vmessage)(Vg_UserMsg, format, vargs); |
| 277 | } |
| 278 | } |
| 279 | static void emit ( HChar* format, ... ) PRINTF_CHECK(1, 2); |
| 280 | static void emit ( HChar* format, ... ) |
| 281 | { |
| 282 | va_list vargs; |
| 283 | va_start(vargs, format); |
| 284 | emit_WRK(format, vargs); |
| 285 | va_end(vargs); |
| 286 | } |
| 287 | static void emiN ( HChar* format, ... ) /* NO FORMAT CHECK */ |
| 288 | { |
| 289 | va_list vargs; |
| 290 | va_start(vargs, format); |
| 291 | emit_WRK(format, vargs); |
| 292 | va_end(vargs); |
| 293 | } |
| 294 | |
| 295 | |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 296 | static void mc_pp_AddrInfo ( Addr a, AddrInfo* ai, Bool maybe_gcc ) |
| 297 | { |
| 298 | HChar* xpre = VG_(clo_xml) ? " <auxwhat>" : " "; |
| 299 | HChar* xpost = VG_(clo_xml) ? "</auxwhat>" : ""; |
| 300 | |
| 301 | switch (ai->tag) { |
| 302 | case Addr_Unknown: |
| 303 | if (maybe_gcc) { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 304 | emit( "%sAddress 0x%llx is just below the stack ptr. " |
| 305 | "To suppress, use: --workaround-gcc296-bugs=yes%s\n", |
| 306 | xpre, (ULong)a, xpost ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 307 | } else { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 308 | emit( "%sAddress 0x%llx " |
| 309 | "is not stack'd, malloc'd or (recently) free'd%s\n", |
| 310 | xpre, (ULong)a, xpost ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 311 | } |
| 312 | break; |
| 313 | |
| 314 | case Addr_Stack: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 315 | emit( "%sAddress 0x%llx is on thread %d's stack%s\n", |
| 316 | xpre, (ULong)a, ai->Addr.Stack.tid, xpost ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 317 | break; |
| 318 | |
| 319 | case Addr_Block: { |
njn | c4431bf | 2009-01-15 21:29:24 +0000 | [diff] [blame] | 320 | SizeT block_szB = ai->Addr.Block.block_szB; |
| 321 | PtrdiffT rwoffset = ai->Addr.Block.rwoffset; |
| 322 | SizeT delta; |
| 323 | const Char* relative; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 324 | |
| 325 | if (rwoffset < 0) { |
| 326 | delta = (SizeT)(-rwoffset); |
| 327 | relative = "before"; |
| 328 | } else if (rwoffset >= block_szB) { |
| 329 | delta = rwoffset - block_szB; |
| 330 | relative = "after"; |
| 331 | } else { |
| 332 | delta = rwoffset; |
| 333 | relative = "inside"; |
| 334 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 335 | emit( |
| 336 | "%sAddress 0x%lx is %'lu bytes %s a %s of size %'lu %s%s\n", |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 337 | xpre, |
| 338 | a, delta, relative, ai->Addr.Block.block_desc, |
| 339 | block_szB, |
| 340 | ai->Addr.Block.block_kind==Block_Mallocd ? "alloc'd" |
| 341 | : ai->Addr.Block.block_kind==Block_Freed ? "free'd" |
| 342 | : "client-defined", |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 343 | xpost |
| 344 | ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 345 | VG_(pp_ExeContext)(ai->Addr.Block.lastchange); |
| 346 | break; |
| 347 | } |
| 348 | |
| 349 | case Addr_DataSym: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 350 | emiN( "%sAddress 0x%llx is %llu bytes " |
| 351 | "inside data symbol \"%t\"%s\n", |
| 352 | xpre, |
| 353 | (ULong)a, |
| 354 | (ULong)ai->Addr.DataSym.offset, |
| 355 | ai->Addr.DataSym.name, |
| 356 | xpost ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 357 | break; |
| 358 | |
| 359 | case Addr_Variable: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 360 | /* Note, no need for XML tags here, because descr1/2 will |
| 361 | already have <auxwhat> or <xauxwhat>s on them, in XML |
| 362 | mode. */ |
| 363 | if (ai->Addr.Variable.descr1) |
| 364 | emit( "%s%s\n", |
| 365 | VG_(clo_xml) ? " " : " ", |
| 366 | (HChar*)VG_(indexXA)(ai->Addr.Variable.descr1, 0) ); |
| 367 | if (ai->Addr.Variable.descr2) |
| 368 | emit( "%s%s\n", |
| 369 | VG_(clo_xml) ? " " : " ", |
| 370 | (HChar*)VG_(indexXA)(ai->Addr.Variable.descr2, 0) ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 371 | break; |
| 372 | |
| 373 | case Addr_SectKind: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 374 | emiN( "%sAddress 0x%llx is in the %t segment of %t%s\n", |
| 375 | xpre, |
| 376 | (ULong)a, |
| 377 | VG_(pp_SectKind)(ai->Addr.SectKind.kind), |
| 378 | ai->Addr.SectKind.objname, |
| 379 | xpost ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 380 | break; |
| 381 | |
| 382 | default: |
| 383 | VG_(tool_panic)("mc_pp_AddrInfo"); |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | static const HChar* str_leak_lossmode ( Reachedness lossmode ) |
| 388 | { |
| 389 | const HChar *loss = "?"; |
| 390 | switch (lossmode) { |
| 391 | case Unreached: loss = "definitely lost"; break; |
| 392 | case IndirectLeak: loss = "indirectly lost"; break; |
njn | 8225cc0 | 2009-03-09 22:52:24 +0000 | [diff] [blame] | 393 | case Possible: loss = "possibly lost"; break; |
| 394 | case Reachable: loss = "still reachable"; break; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 395 | } |
| 396 | return loss; |
| 397 | } |
| 398 | |
| 399 | static const HChar* xml_leak_kind ( Reachedness lossmode ) |
| 400 | { |
| 401 | const HChar *loss = "?"; |
| 402 | switch (lossmode) { |
| 403 | case Unreached: loss = "Leak_DefinitelyLost"; break; |
| 404 | case IndirectLeak: loss = "Leak_IndirectlyLost"; break; |
njn | 8225cc0 | 2009-03-09 22:52:24 +0000 | [diff] [blame] | 405 | case Possible: loss = "Leak_PossiblyLost"; break; |
| 406 | case Reachable: loss = "Leak_StillReachable"; break; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 407 | } |
| 408 | return loss; |
| 409 | } |
| 410 | |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 411 | static void mc_pp_origin ( ExeContext* ec, UInt okind ) |
| 412 | { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 413 | HChar* src = NULL; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 414 | tl_assert(ec); |
| 415 | |
| 416 | switch (okind) { |
| 417 | case MC_OKIND_STACK: src = " by a stack allocation"; break; |
| 418 | case MC_OKIND_HEAP: src = " by a heap allocation"; break; |
| 419 | case MC_OKIND_USER: src = " by a client request"; break; |
| 420 | case MC_OKIND_UNKNOWN: src = ""; break; |
| 421 | } |
| 422 | tl_assert(src); /* guards against invalid 'okind' */ |
| 423 | |
| 424 | if (VG_(clo_xml)) { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 425 | emit( " <auxwhat>Uninitialised value was created%s</auxwhat>\n", |
| 426 | src); |
| 427 | VG_(pp_ExeContext)( ec ); |
| 428 | } else { |
| 429 | emit( " Uninitialised value was created%s\n", src); |
| 430 | VG_(pp_ExeContext)( ec ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 431 | } |
| 432 | } |
| 433 | |
| 434 | void MC_(pp_Error) ( Error* err ) |
| 435 | { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 436 | const Bool xml = VG_(clo_xml); /* a shorthand */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 437 | MC_Error* extra = VG_(get_error_extra)(err); |
| 438 | |
| 439 | switch (VG_(get_error_kind)(err)) { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 440 | case Err_CoreMem: |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 441 | /* What the hell *is* a CoreMemError? jrs 2005-May-18 */ |
| 442 | /* As of 2006-Dec-14, it's caused by unaddressable bytes in a |
| 443 | signal handler frame. --njn */ |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 444 | // JRS 17 May 09: None of our regtests exercise this; hence AFAIK |
| 445 | // the following code is untested. Bad. |
| 446 | if (xml) { |
| 447 | emit( " <kind>CoreMemError</kind>\n" ); |
| 448 | emiN( " <what>%t contains unaddressable byte(s)</what>\n", |
| 449 | VG_(get_error_string)(err)); |
| 450 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 451 | } else { |
| 452 | emit( "%s contains unaddressable byte(s)\n", |
| 453 | VG_(get_error_string)(err)); |
| 454 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 455 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 456 | break; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 457 | |
| 458 | case Err_Value: |
| 459 | MC_(any_value_errors) = True; |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 460 | if (xml) { |
| 461 | emit( " <kind>UninitValue</kind>\n" ); |
| 462 | emit( " <what>Use of uninitialised value of size %ld</what>\n", |
| 463 | extra->Err.Value.szB ); |
| 464 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 465 | if (extra->Err.Value.origin_ec) |
| 466 | mc_pp_origin( extra->Err.Value.origin_ec, |
| 467 | extra->Err.Value.otag & 3 ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 468 | } else { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 469 | /* Could also show extra->Err.Cond.otag if debugging origin |
| 470 | tracking */ |
| 471 | emit( "Use of uninitialised value of size %ld\n", |
| 472 | extra->Err.Value.szB ); |
| 473 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 474 | if (extra->Err.Value.origin_ec) |
| 475 | mc_pp_origin( extra->Err.Value.origin_ec, |
| 476 | extra->Err.Value.otag & 3 ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 477 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 478 | break; |
| 479 | |
| 480 | case Err_Cond: |
| 481 | MC_(any_value_errors) = True; |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 482 | if (xml) { |
| 483 | emit( " <kind>UninitCondition</kind>\n" ); |
| 484 | emit( " <what>Conditional jump or move depends" |
| 485 | " on uninitialised value(s)</what>\n" ); |
| 486 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 487 | if (extra->Err.Cond.origin_ec) |
| 488 | mc_pp_origin( extra->Err.Cond.origin_ec, |
| 489 | extra->Err.Cond.otag & 3 ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 490 | } else { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 491 | /* Could also show extra->Err.Cond.otag if debugging origin |
| 492 | tracking */ |
| 493 | emit( "Conditional jump or move depends" |
| 494 | " on uninitialised value(s)\n" ); |
| 495 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 496 | if (extra->Err.Cond.origin_ec) |
| 497 | mc_pp_origin( extra->Err.Cond.origin_ec, |
| 498 | extra->Err.Cond.otag & 3 ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 499 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 500 | break; |
| 501 | |
| 502 | case Err_RegParam: |
| 503 | MC_(any_value_errors) = True; |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 504 | if (xml) { |
| 505 | emit( " <kind>SyscallParam</kind>\n" ); |
| 506 | emiN( " <what>Syscall param %t contains " |
| 507 | "uninitialised byte(s)</what>\n", |
| 508 | VG_(get_error_string)(err) ); |
| 509 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 510 | if (extra->Err.RegParam.origin_ec) |
| 511 | mc_pp_origin( extra->Err.RegParam.origin_ec, |
| 512 | extra->Err.RegParam.otag & 3 ); |
| 513 | } else { |
| 514 | emit( "Syscall param %s contains uninitialised byte(s)\n", |
| 515 | VG_(get_error_string)(err) ); |
| 516 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 517 | if (extra->Err.RegParam.origin_ec) |
| 518 | mc_pp_origin( extra->Err.RegParam.origin_ec, |
| 519 | extra->Err.RegParam.otag & 3 ); |
| 520 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 521 | break; |
| 522 | |
| 523 | case Err_MemParam: |
| 524 | if (!extra->Err.MemParam.isAddrErr) |
| 525 | MC_(any_value_errors) = True; |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 526 | if (xml) { |
| 527 | emit( " <kind>SyscallParam</kind>\n" ); |
| 528 | emiN( " <what>Syscall param %t points to %s byte(s)</what>\n", |
| 529 | VG_(get_error_string)(err), |
| 530 | extra->Err.MemParam.isAddrErr |
| 531 | ? "unaddressable" : "uninitialised" ); |
| 532 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 533 | mc_pp_AddrInfo(VG_(get_error_address)(err), |
| 534 | &extra->Err.MemParam.ai, False); |
| 535 | if (extra->Err.MemParam.origin_ec |
| 536 | && !extra->Err.MemParam.isAddrErr) |
| 537 | mc_pp_origin( extra->Err.MemParam.origin_ec, |
| 538 | extra->Err.MemParam.otag & 3 ); |
| 539 | } else { |
| 540 | emit( "Syscall param %s points to %s byte(s)\n", |
| 541 | VG_(get_error_string)(err), |
| 542 | extra->Err.MemParam.isAddrErr |
| 543 | ? "unaddressable" : "uninitialised" ); |
| 544 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 545 | mc_pp_AddrInfo(VG_(get_error_address)(err), |
| 546 | &extra->Err.MemParam.ai, False); |
| 547 | if (extra->Err.MemParam.origin_ec |
| 548 | && !extra->Err.MemParam.isAddrErr) |
| 549 | mc_pp_origin( extra->Err.MemParam.origin_ec, |
| 550 | extra->Err.MemParam.otag & 3 ); |
| 551 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 552 | break; |
| 553 | |
| 554 | case Err_User: |
| 555 | if (!extra->Err.User.isAddrErr) |
| 556 | MC_(any_value_errors) = True; |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 557 | if (xml) { |
| 558 | emit( " <kind>ClientCheck</kind>\n" ); |
| 559 | emit( " <what>%s byte(s) found " |
| 560 | "during client check request</what>\n", |
| 561 | extra->Err.User.isAddrErr |
| 562 | ? "Unaddressable" : "Uninitialised" ); |
| 563 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 564 | mc_pp_AddrInfo(VG_(get_error_address)(err), &extra->Err.User.ai, |
| 565 | False); |
| 566 | if (extra->Err.User.origin_ec && !extra->Err.User.isAddrErr) |
| 567 | mc_pp_origin( extra->Err.User.origin_ec, |
| 568 | extra->Err.User.otag & 3 ); |
| 569 | } else { |
| 570 | emit( "%s byte(s) found during client check request\n", |
| 571 | extra->Err.User.isAddrErr |
| 572 | ? "Unaddressable" : "Uninitialised" ); |
| 573 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 574 | mc_pp_AddrInfo(VG_(get_error_address)(err), &extra->Err.User.ai, |
| 575 | False); |
| 576 | if (extra->Err.User.origin_ec && !extra->Err.User.isAddrErr) |
| 577 | mc_pp_origin( extra->Err.User.origin_ec, |
| 578 | extra->Err.User.otag & 3 ); |
| 579 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 580 | break; |
| 581 | |
| 582 | case Err_Free: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 583 | if (xml) { |
| 584 | emit( " <kind>InvalidFree</kind>\n" ); |
| 585 | emit( " <what>Invalid free() / delete / delete[]</what>\n" ); |
| 586 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 587 | mc_pp_AddrInfo( VG_(get_error_address)(err), |
| 588 | &extra->Err.Free.ai, False ); |
| 589 | } else { |
| 590 | emit( "Invalid free() / delete / delete[]\n" ); |
| 591 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 592 | mc_pp_AddrInfo( VG_(get_error_address)(err), |
| 593 | &extra->Err.Free.ai, False ); |
| 594 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 595 | break; |
| 596 | |
| 597 | case Err_FreeMismatch: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 598 | if (xml) { |
| 599 | emit( " <kind>MismatchedFree</kind>\n" ); |
| 600 | emit( " <what>Mismatched free() / delete / delete []</what>\n" ); |
| 601 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 602 | mc_pp_AddrInfo(VG_(get_error_address)(err), |
| 603 | &extra->Err.FreeMismatch.ai, False); |
| 604 | } else { |
| 605 | emit( "Mismatched free() / delete / delete []\n" ); |
| 606 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 607 | mc_pp_AddrInfo(VG_(get_error_address)(err), |
| 608 | &extra->Err.FreeMismatch.ai, False); |
| 609 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 610 | break; |
| 611 | |
| 612 | case Err_Addr: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 613 | if (xml) { |
| 614 | emit( " <kind>Invalid%s</kind>\n", |
| 615 | extra->Err.Addr.isWrite ? "Write" : "Read" ); |
| 616 | emit( " <what>Invalid %s of size %ld</what>\n", |
| 617 | extra->Err.Addr.isWrite ? "write" : "read", |
| 618 | extra->Err.Addr.szB ); |
| 619 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 620 | mc_pp_AddrInfo( VG_(get_error_address)(err), |
| 621 | &extra->Err.Addr.ai, |
| 622 | extra->Err.Addr.maybe_gcc ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 623 | } else { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 624 | emit( "Invalid %s of size %ld\n", |
| 625 | extra->Err.Addr.isWrite ? "write" : "read", |
| 626 | extra->Err.Addr.szB ); |
| 627 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 628 | |
| 629 | mc_pp_AddrInfo( VG_(get_error_address)(err), |
| 630 | &extra->Err.Addr.ai, |
| 631 | extra->Err.Addr.maybe_gcc ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 632 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 633 | break; |
| 634 | |
| 635 | case Err_Jump: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 636 | if (xml) { |
| 637 | emit( " <kind>InvalidJump</kind>\n" ); |
| 638 | emit( " <what>Jump to the invalid address stated " |
| 639 | "on the next line</what>\n" ); |
| 640 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 641 | mc_pp_AddrInfo( VG_(get_error_address)(err), &extra->Err.Jump.ai, |
| 642 | False ); |
| 643 | } else { |
| 644 | emit( "Jump to the invalid address stated on the next line\n" ); |
| 645 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 646 | mc_pp_AddrInfo( VG_(get_error_address)(err), &extra->Err.Jump.ai, |
| 647 | False ); |
| 648 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 649 | break; |
| 650 | |
| 651 | case Err_Overlap: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 652 | if (xml) { |
| 653 | emit( " <kind>Overlap</kind>\n" ); |
| 654 | if (extra->Err.Overlap.szB == 0) { |
| 655 | emiN( " <what>Source and destination overlap " |
| 656 | "in %t(%#lx, %#lx)\n</what>\n", |
| 657 | VG_(get_error_string)(err), |
| 658 | extra->Err.Overlap.dst, extra->Err.Overlap.src ); |
| 659 | } else { |
| 660 | emit( " <what>Source and destination overlap " |
| 661 | "in %s(%#lx, %#lx, %d)</what>\n", |
| 662 | VG_(get_error_string)(err), |
| 663 | extra->Err.Overlap.dst, extra->Err.Overlap.src, |
| 664 | extra->Err.Overlap.szB ); |
| 665 | } |
| 666 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 667 | } else { |
| 668 | if (extra->Err.Overlap.szB == 0) { |
| 669 | emiN( "Source and destination overlap in %t(%#lx, %#lx)\n", |
| 670 | VG_(get_error_string)(err), |
| 671 | extra->Err.Overlap.dst, extra->Err.Overlap.src ); |
| 672 | } else { |
| 673 | emit( "Source and destination overlap in %s(%#lx, %#lx, %d)\n", |
| 674 | VG_(get_error_string)(err), |
| 675 | extra->Err.Overlap.dst, extra->Err.Overlap.src, |
| 676 | extra->Err.Overlap.szB ); |
| 677 | } |
| 678 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 679 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 680 | break; |
| 681 | |
| 682 | case Err_IllegalMempool: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 683 | // JRS 17 May 09: None of our regtests exercise this; hence AFAIK |
| 684 | // the following code is untested. Bad. |
| 685 | if (xml) { |
| 686 | emit( " <kind>InvalidMemPool</kind>\n" ); |
| 687 | emit( " <what>Illegal memory pool address</what>\n" ); |
| 688 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 689 | mc_pp_AddrInfo( VG_(get_error_address)(err), |
| 690 | &extra->Err.IllegalMempool.ai, False ); |
| 691 | } else { |
| 692 | emit( "Illegal memory pool address\n" ); |
| 693 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 694 | mc_pp_AddrInfo( VG_(get_error_address)(err), |
| 695 | &extra->Err.IllegalMempool.ai, False ); |
| 696 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 697 | break; |
| 698 | |
| 699 | case Err_Leak: { |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 700 | UInt n_this_record = extra->Err.Leak.n_this_record; |
| 701 | UInt n_total_records = extra->Err.Leak.n_total_records; |
njn | b7a4e2e | 2009-05-01 00:30:43 +0000 | [diff] [blame] | 702 | LossRecord* lr = extra->Err.Leak.lr; |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 703 | if (xml) { |
| 704 | emit(" <kind>%s</kind>\n", xml_leak_kind(lr->key.state)); |
| 705 | if (lr->indirect_szB > 0) { |
| 706 | emit( " <xwhat>\n" ); |
| 707 | emit( " <text>%'lu (%'lu direct, %'lu indirect) bytes " |
| 708 | "in %'u blocks" |
| 709 | " are %s in loss record %'u of %'u</text>\n", |
| 710 | lr->szB + lr->indirect_szB, lr->szB, lr->indirect_szB, |
| 711 | lr->num_blocks, |
| 712 | str_leak_lossmode(lr->key.state), |
| 713 | n_this_record, n_total_records ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 714 | // Nb: don't put commas in these XML numbers |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 715 | emit( " <leakedbytes>%lu</leakedbytes>\n", |
| 716 | lr->szB + lr->indirect_szB ); |
| 717 | emit( " <leakedblocks>%u</leakedblocks>\n", lr->num_blocks ); |
| 718 | emit( " </xwhat>\n" ); |
| 719 | } else { |
| 720 | emit( " <xwhat>\n" ); |
| 721 | emit( " <text>%'lu bytes in %'u blocks" |
| 722 | " are %s in loss record %'u of %'u</text>\n", |
| 723 | lr->szB, lr->num_blocks, |
| 724 | str_leak_lossmode(lr->key.state), |
| 725 | n_this_record, n_total_records ); |
| 726 | emit( " <leakedbytes>%ld</leakedbytes>\n", lr->szB); |
| 727 | emit( " <leakedblocks>%d</leakedblocks>\n", lr->num_blocks); |
| 728 | emit( " </xwhat>\n" ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 729 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 730 | VG_(pp_ExeContext)(lr->key.allocated_at); |
| 731 | } else { /* ! if (xml) */ |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 732 | if (lr->indirect_szB > 0) { |
| 733 | emit( |
| 734 | "%'lu (%'lu direct, %'lu indirect) bytes in %'u blocks" |
| 735 | " are %s in loss record %'u of %'u\n", |
| 736 | lr->szB + lr->indirect_szB, lr->szB, lr->indirect_szB, |
| 737 | lr->num_blocks, str_leak_lossmode(lr->key.state), |
| 738 | n_this_record, n_total_records |
| 739 | ); |
| 740 | } else { |
| 741 | emit( |
| 742 | "%'lu bytes in %'u blocks are %s in loss record %'u of %'u\n", |
| 743 | lr->szB, lr->num_blocks, str_leak_lossmode(lr->key.state), |
| 744 | n_this_record, n_total_records |
| 745 | ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 746 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 747 | VG_(pp_ExeContext)(lr->key.allocated_at); |
| 748 | } /* if (xml) */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 749 | break; |
| 750 | } |
| 751 | |
| 752 | default: |
| 753 | VG_(printf)("Error:\n unknown Memcheck error code %d\n", |
| 754 | VG_(get_error_kind)(err)); |
| 755 | VG_(tool_panic)("unknown error code in mc_pp_Error)"); |
| 756 | } |
| 757 | } |
| 758 | |
| 759 | /*------------------------------------------------------------*/ |
| 760 | /*--- Recording errors ---*/ |
| 761 | /*------------------------------------------------------------*/ |
| 762 | |
| 763 | /* These many bytes below %ESP are considered addressible if we're |
| 764 | doing the --workaround-gcc296-bugs hack. */ |
| 765 | #define VG_GCC296_BUG_STACK_SLOP 1024 |
| 766 | |
| 767 | /* Is this address within some small distance below %ESP? Used only |
| 768 | for the --workaround-gcc296-bugs kludge. */ |
| 769 | static Bool is_just_below_ESP( Addr esp, Addr aa ) |
| 770 | { |
sewardj | 7d751b2 | 2010-07-21 12:46:44 +0000 | [diff] [blame] | 771 | esp -= VG_STACK_REDZONE_SZB; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 772 | if (esp > aa && (esp - aa) <= VG_GCC296_BUG_STACK_SLOP) |
| 773 | return True; |
| 774 | else |
| 775 | return False; |
| 776 | } |
| 777 | |
| 778 | /* --- Called from generated and non-generated code --- */ |
| 779 | |
| 780 | void MC_(record_address_error) ( ThreadId tid, Addr a, Int szB, |
| 781 | Bool isWrite ) |
| 782 | { |
| 783 | MC_Error extra; |
| 784 | Bool just_below_esp; |
| 785 | |
| 786 | if (MC_(in_ignored_range)(a)) |
| 787 | return; |
| 788 | |
| 789 | # if defined(VGP_ppc32_aix5) || defined(VGP_ppc64_aix5) |
| 790 | /* AIX zero-page handling. On AIX, reads from page zero are, |
| 791 | bizarrely enough, legitimate. Writes to page zero aren't, |
| 792 | though. Since memcheck can't distinguish reads from writes, the |
| 793 | best we can do is to 'act normal' and mark the A bits in the |
| 794 | normal way as noaccess, but then hide any reads from that page |
| 795 | that get reported here. */ |
| 796 | if ((!isWrite) && a >= 0 && a < 4096 && a+szB <= 4096) |
| 797 | return; |
| 798 | |
| 799 | /* Appalling AIX hack. It suppresses reads done by glink |
| 800 | fragments. Getting rid of this would require figuring out |
| 801 | somehow where the referenced data areas are (and their |
| 802 | sizes). */ |
| 803 | if ((!isWrite) && szB == sizeof(Word)) { |
| 804 | UInt i1, i2; |
| 805 | UInt* pc = (UInt*)VG_(get_IP)(tid); |
| 806 | if (sizeof(Word) == 4) { |
| 807 | i1 = 0x800c0000; /* lwz r0,0(r12) */ |
| 808 | i2 = 0x804c0004; /* lwz r2,4(r12) */ |
| 809 | } else { |
| 810 | i1 = 0xe80c0000; /* ld r0,0(r12) */ |
| 811 | i2 = 0xe84c0008; /* ld r2,8(r12) */ |
| 812 | } |
| 813 | if (pc[0] == i1 && pc[1] == i2) return; |
| 814 | if (pc[0] == i2 && pc[-1] == i1) return; |
| 815 | } |
| 816 | # endif |
| 817 | |
| 818 | just_below_esp = is_just_below_ESP( VG_(get_SP)(tid), a ); |
| 819 | |
| 820 | /* If this is caused by an access immediately below %ESP, and the |
| 821 | user asks nicely, we just ignore it. */ |
| 822 | if (MC_(clo_workaround_gcc296_bugs) && just_below_esp) |
| 823 | return; |
| 824 | |
| 825 | extra.Err.Addr.isWrite = isWrite; |
| 826 | extra.Err.Addr.szB = szB; |
| 827 | extra.Err.Addr.maybe_gcc = just_below_esp; |
| 828 | extra.Err.Addr.ai.tag = Addr_Undescribed; |
| 829 | VG_(maybe_record_error)( tid, Err_Addr, a, /*s*/NULL, &extra ); |
| 830 | } |
| 831 | |
| 832 | void MC_(record_value_error) ( ThreadId tid, Int szB, UInt otag ) |
| 833 | { |
| 834 | MC_Error extra; |
| 835 | tl_assert( MC_(clo_mc_level) >= 2 ); |
| 836 | if (otag > 0) |
| 837 | tl_assert( MC_(clo_mc_level) == 3 ); |
| 838 | extra.Err.Value.szB = szB; |
| 839 | extra.Err.Value.otag = otag; |
| 840 | extra.Err.Value.origin_ec = NULL; /* Filled in later */ |
| 841 | VG_(maybe_record_error)( tid, Err_Value, /*addr*/0, /*s*/NULL, &extra ); |
| 842 | } |
| 843 | |
| 844 | void MC_(record_cond_error) ( ThreadId tid, UInt otag ) |
| 845 | { |
| 846 | MC_Error extra; |
| 847 | tl_assert( MC_(clo_mc_level) >= 2 ); |
| 848 | if (otag > 0) |
| 849 | tl_assert( MC_(clo_mc_level) == 3 ); |
| 850 | extra.Err.Cond.otag = otag; |
| 851 | extra.Err.Cond.origin_ec = NULL; /* Filled in later */ |
| 852 | VG_(maybe_record_error)( tid, Err_Cond, /*addr*/0, /*s*/NULL, &extra ); |
| 853 | } |
| 854 | |
| 855 | /* --- Called from non-generated code --- */ |
| 856 | |
njn | 1dcee09 | 2009-02-24 03:07:37 +0000 | [diff] [blame] | 857 | /* This is for memory errors in signal-related memory. */ |
| 858 | void MC_(record_core_mem_error) ( ThreadId tid, Char* msg ) |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 859 | { |
| 860 | VG_(maybe_record_error)( tid, Err_CoreMem, /*addr*/0, msg, /*extra*/NULL ); |
| 861 | } |
| 862 | |
| 863 | void MC_(record_regparam_error) ( ThreadId tid, Char* msg, UInt otag ) |
| 864 | { |
| 865 | MC_Error extra; |
| 866 | tl_assert(VG_INVALID_THREADID != tid); |
| 867 | if (otag > 0) |
| 868 | tl_assert( MC_(clo_mc_level) == 3 ); |
| 869 | extra.Err.RegParam.otag = otag; |
| 870 | extra.Err.RegParam.origin_ec = NULL; /* Filled in later */ |
| 871 | VG_(maybe_record_error)( tid, Err_RegParam, /*addr*/0, msg, &extra ); |
| 872 | } |
| 873 | |
| 874 | void MC_(record_memparam_error) ( ThreadId tid, Addr a, |
| 875 | Bool isAddrErr, Char* msg, UInt otag ) |
| 876 | { |
| 877 | MC_Error extra; |
| 878 | tl_assert(VG_INVALID_THREADID != tid); |
| 879 | if (!isAddrErr) |
| 880 | tl_assert( MC_(clo_mc_level) >= 2 ); |
| 881 | if (otag != 0) { |
| 882 | tl_assert( MC_(clo_mc_level) == 3 ); |
| 883 | tl_assert( !isAddrErr ); |
| 884 | } |
| 885 | extra.Err.MemParam.isAddrErr = isAddrErr; |
| 886 | extra.Err.MemParam.ai.tag = Addr_Undescribed; |
| 887 | extra.Err.MemParam.otag = otag; |
| 888 | extra.Err.MemParam.origin_ec = NULL; /* Filled in later */ |
| 889 | VG_(maybe_record_error)( tid, Err_MemParam, a, msg, &extra ); |
| 890 | } |
| 891 | |
| 892 | void MC_(record_jump_error) ( ThreadId tid, Addr a ) |
| 893 | { |
| 894 | MC_Error extra; |
| 895 | tl_assert(VG_INVALID_THREADID != tid); |
| 896 | extra.Err.Jump.ai.tag = Addr_Undescribed; |
| 897 | VG_(maybe_record_error)( tid, Err_Jump, a, /*s*/NULL, &extra ); |
| 898 | } |
| 899 | |
| 900 | void MC_(record_free_error) ( ThreadId tid, Addr a ) |
| 901 | { |
| 902 | MC_Error extra; |
| 903 | tl_assert(VG_INVALID_THREADID != tid); |
| 904 | extra.Err.Free.ai.tag = Addr_Undescribed; |
| 905 | VG_(maybe_record_error)( tid, Err_Free, a, /*s*/NULL, &extra ); |
| 906 | } |
| 907 | |
| 908 | void MC_(record_freemismatch_error) ( ThreadId tid, MC_Chunk* mc ) |
| 909 | { |
| 910 | MC_Error extra; |
| 911 | AddrInfo* ai = &extra.Err.FreeMismatch.ai; |
| 912 | tl_assert(VG_INVALID_THREADID != tid); |
| 913 | ai->tag = Addr_Block; |
| 914 | ai->Addr.Block.block_kind = Block_Mallocd; // Nb: Not 'Block_Freed' |
| 915 | ai->Addr.Block.block_desc = "block"; |
| 916 | ai->Addr.Block.block_szB = mc->szB; |
| 917 | ai->Addr.Block.rwoffset = 0; |
| 918 | ai->Addr.Block.lastchange = mc->where; |
| 919 | VG_(maybe_record_error)( tid, Err_FreeMismatch, mc->data, /*s*/NULL, |
| 920 | &extra ); |
| 921 | } |
| 922 | |
| 923 | void MC_(record_illegal_mempool_error) ( ThreadId tid, Addr a ) |
| 924 | { |
| 925 | MC_Error extra; |
| 926 | tl_assert(VG_INVALID_THREADID != tid); |
| 927 | extra.Err.IllegalMempool.ai.tag = Addr_Undescribed; |
| 928 | VG_(maybe_record_error)( tid, Err_IllegalMempool, a, /*s*/NULL, &extra ); |
| 929 | } |
| 930 | |
| 931 | void MC_(record_overlap_error) ( ThreadId tid, Char* function, |
| 932 | Addr src, Addr dst, SizeT szB ) |
| 933 | { |
| 934 | MC_Error extra; |
| 935 | tl_assert(VG_INVALID_THREADID != tid); |
| 936 | extra.Err.Overlap.src = src; |
| 937 | extra.Err.Overlap.dst = dst; |
| 938 | extra.Err.Overlap.szB = szB; |
| 939 | VG_(maybe_record_error)( |
| 940 | tid, Err_Overlap, /*addr*/0, /*s*/function, &extra ); |
| 941 | } |
| 942 | |
| 943 | Bool MC_(record_leak_error) ( ThreadId tid, UInt n_this_record, |
njn | b7a4e2e | 2009-05-01 00:30:43 +0000 | [diff] [blame] | 944 | UInt n_total_records, LossRecord* lr, |
njn | 18afe5d | 2009-08-10 08:25:39 +0000 | [diff] [blame] | 945 | Bool print_record, Bool count_error ) |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 946 | { |
| 947 | MC_Error extra; |
| 948 | extra.Err.Leak.n_this_record = n_this_record; |
| 949 | extra.Err.Leak.n_total_records = n_total_records; |
njn | b7a4e2e | 2009-05-01 00:30:43 +0000 | [diff] [blame] | 950 | extra.Err.Leak.lr = lr; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 951 | return |
| 952 | VG_(unique_error) ( tid, Err_Leak, /*Addr*/0, /*s*/NULL, &extra, |
njn | 29a5c01 | 2009-05-06 06:15:55 +0000 | [diff] [blame] | 953 | lr->key.allocated_at, print_record, |
njn | 18afe5d | 2009-08-10 08:25:39 +0000 | [diff] [blame] | 954 | /*allow_GDB_attach*/False, count_error ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 955 | } |
| 956 | |
| 957 | void MC_(record_user_error) ( ThreadId tid, Addr a, |
| 958 | Bool isAddrErr, UInt otag ) |
| 959 | { |
| 960 | MC_Error extra; |
| 961 | if (otag != 0) { |
| 962 | tl_assert(!isAddrErr); |
| 963 | tl_assert( MC_(clo_mc_level) == 3 ); |
| 964 | } |
| 965 | if (!isAddrErr) { |
| 966 | tl_assert( MC_(clo_mc_level) >= 2 ); |
| 967 | } |
| 968 | tl_assert(VG_INVALID_THREADID != tid); |
| 969 | extra.Err.User.isAddrErr = isAddrErr; |
| 970 | extra.Err.User.ai.tag = Addr_Undescribed; |
| 971 | extra.Err.User.otag = otag; |
| 972 | extra.Err.User.origin_ec = NULL; /* Filled in later */ |
| 973 | VG_(maybe_record_error)( tid, Err_User, a, /*s*/NULL, &extra ); |
| 974 | } |
| 975 | |
| 976 | /*------------------------------------------------------------*/ |
| 977 | /*--- Other error operations ---*/ |
| 978 | /*------------------------------------------------------------*/ |
| 979 | |
| 980 | /* Compare error contexts, to detect duplicates. Note that if they |
| 981 | are otherwise the same, the faulting addrs and associated rwoffsets |
| 982 | are allowed to be different. */ |
| 983 | Bool MC_(eq_Error) ( VgRes res, Error* e1, Error* e2 ) |
| 984 | { |
| 985 | MC_Error* extra1 = VG_(get_error_extra)(e1); |
| 986 | MC_Error* extra2 = VG_(get_error_extra)(e2); |
| 987 | |
| 988 | /* Guaranteed by calling function */ |
| 989 | tl_assert(VG_(get_error_kind)(e1) == VG_(get_error_kind)(e2)); |
| 990 | |
| 991 | switch (VG_(get_error_kind)(e1)) { |
| 992 | case Err_CoreMem: { |
| 993 | Char *e1s, *e2s; |
| 994 | e1s = VG_(get_error_string)(e1); |
| 995 | e2s = VG_(get_error_string)(e2); |
| 996 | if (e1s == e2s) return True; |
| 997 | if (VG_STREQ(e1s, e2s)) return True; |
| 998 | return False; |
| 999 | } |
| 1000 | |
| 1001 | case Err_RegParam: |
| 1002 | return VG_STREQ(VG_(get_error_string)(e1), VG_(get_error_string)(e2)); |
| 1003 | |
| 1004 | // Perhaps we should also check the addrinfo.akinds for equality. |
| 1005 | // That would result in more error reports, but only in cases where |
| 1006 | // a register contains uninitialised bytes and points to memory |
| 1007 | // containing uninitialised bytes. Currently, the 2nd of those to be |
| 1008 | // detected won't be reported. That is (nearly?) always the memory |
| 1009 | // error, which is good. |
| 1010 | case Err_MemParam: |
| 1011 | if (!VG_STREQ(VG_(get_error_string)(e1), |
| 1012 | VG_(get_error_string)(e2))) return False; |
| 1013 | // fall through |
| 1014 | case Err_User: |
| 1015 | return ( extra1->Err.User.isAddrErr == extra2->Err.User.isAddrErr |
| 1016 | ? True : False ); |
| 1017 | |
| 1018 | case Err_Free: |
| 1019 | case Err_FreeMismatch: |
| 1020 | case Err_Jump: |
| 1021 | case Err_IllegalMempool: |
| 1022 | case Err_Overlap: |
| 1023 | case Err_Cond: |
| 1024 | return True; |
| 1025 | |
| 1026 | case Err_Addr: |
| 1027 | return ( extra1->Err.Addr.szB == extra2->Err.Addr.szB |
| 1028 | ? True : False ); |
| 1029 | |
| 1030 | case Err_Value: |
| 1031 | return ( extra1->Err.Value.szB == extra2->Err.Value.szB |
| 1032 | ? True : False ); |
| 1033 | |
| 1034 | case Err_Leak: |
| 1035 | VG_(tool_panic)("Shouldn't get Err_Leak in mc_eq_Error,\n" |
| 1036 | "since it's handled with VG_(unique_error)()!"); |
| 1037 | |
| 1038 | default: |
| 1039 | VG_(printf)("Error:\n unknown error code %d\n", |
| 1040 | VG_(get_error_kind)(e1)); |
| 1041 | VG_(tool_panic)("unknown error code in mc_eq_Error"); |
| 1042 | } |
| 1043 | } |
| 1044 | |
| 1045 | /* Function used when searching MC_Chunk lists */ |
| 1046 | static Bool addr_is_in_MC_Chunk(MC_Chunk* mc, Addr a) |
| 1047 | { |
| 1048 | // Nb: this is not quite right! It assumes that the heap block has |
| 1049 | // a redzone of size MC_MALLOC_REDZONE_SZB. That's true for malloc'd |
| 1050 | // blocks, but not necessarily true for custom-alloc'd blocks. So |
| 1051 | // in some cases this could result in an incorrect description (eg. |
| 1052 | // saying "12 bytes after block A" when really it's within block B. |
| 1053 | // Fixing would require adding redzone size to MC_Chunks, though. |
| 1054 | return VG_(addr_is_in_block)( a, mc->data, mc->szB, |
| 1055 | MC_MALLOC_REDZONE_SZB ); |
| 1056 | } |
| 1057 | |
| 1058 | // Forward declaration |
| 1059 | static Bool client_block_maybe_describe( Addr a, AddrInfo* ai ); |
| 1060 | |
| 1061 | |
| 1062 | /* Describe an address as best you can, for error messages, |
| 1063 | putting the result in ai. */ |
| 1064 | static void describe_addr ( Addr a, /*OUT*/AddrInfo* ai ) |
| 1065 | { |
| 1066 | MC_Chunk* mc; |
| 1067 | ThreadId tid; |
| 1068 | Addr stack_min, stack_max; |
| 1069 | VgSectKind sect; |
| 1070 | |
| 1071 | tl_assert(Addr_Undescribed == ai->tag); |
| 1072 | |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1073 | /* -- Perhaps it's a user-def'd block? -- */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1074 | if (client_block_maybe_describe( a, ai )) { |
| 1075 | return; |
| 1076 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1077 | /* -- Search for a recently freed block which might bracket it. -- */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1078 | mc = MC_(get_freed_list_head)(); |
| 1079 | while (mc) { |
| 1080 | if (addr_is_in_MC_Chunk(mc, a)) { |
| 1081 | ai->tag = Addr_Block; |
| 1082 | ai->Addr.Block.block_kind = Block_Freed; |
| 1083 | ai->Addr.Block.block_desc = "block"; |
| 1084 | ai->Addr.Block.block_szB = mc->szB; |
sewardj | 56adc35 | 2008-05-02 11:25:17 +0000 | [diff] [blame] | 1085 | ai->Addr.Block.rwoffset = (Word)a - (Word)mc->data; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1086 | ai->Addr.Block.lastchange = mc->where; |
| 1087 | return; |
| 1088 | } |
| 1089 | mc = mc->next; |
| 1090 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1091 | /* -- Search for a currently malloc'd block which might bracket it. -- */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1092 | VG_(HT_ResetIter)(MC_(malloc_list)); |
| 1093 | while ( (mc = VG_(HT_Next)(MC_(malloc_list))) ) { |
| 1094 | if (addr_is_in_MC_Chunk(mc, a)) { |
| 1095 | ai->tag = Addr_Block; |
| 1096 | ai->Addr.Block.block_kind = Block_Mallocd; |
| 1097 | ai->Addr.Block.block_desc = "block"; |
| 1098 | ai->Addr.Block.block_szB = mc->szB; |
sewardj | 56adc35 | 2008-05-02 11:25:17 +0000 | [diff] [blame] | 1099 | ai->Addr.Block.rwoffset = (Word)a - (Word)mc->data; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1100 | ai->Addr.Block.lastchange = mc->where; |
| 1101 | return; |
| 1102 | } |
| 1103 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1104 | /* -- Perhaps the variable type/location data describes it? -- */ |
| 1105 | ai->Addr.Variable.descr1 |
| 1106 | = VG_(newXA)( VG_(malloc), "mc.da.descr1", |
| 1107 | VG_(free), sizeof(HChar) ); |
| 1108 | ai->Addr.Variable.descr2 |
| 1109 | = VG_(newXA)( VG_(malloc), "mc.da.descr2", |
| 1110 | VG_(free), sizeof(HChar) ); |
| 1111 | |
| 1112 | (void) VG_(get_data_description)( ai->Addr.Variable.descr1, |
| 1113 | ai->Addr.Variable.descr2, a ); |
| 1114 | /* If there's nothing in descr1/2, free them. Why is it safe to to |
| 1115 | VG_(indexXA) at zero here? Because VG_(get_data_description) |
| 1116 | guarantees to zero terminate descr1/2 regardless of the outcome |
| 1117 | of the call. So there's always at least one element in each XA |
| 1118 | after the call. |
| 1119 | */ |
| 1120 | if (0 == VG_(strlen)( VG_(indexXA)( ai->Addr.Variable.descr1, 0 ))) { |
| 1121 | VG_(deleteXA)( ai->Addr.Variable.descr1 ); |
| 1122 | ai->Addr.Variable.descr1 = NULL; |
| 1123 | } |
| 1124 | if (0 == VG_(strlen)( VG_(indexXA)( ai->Addr.Variable.descr2, 0 ))) { |
| 1125 | VG_(deleteXA)( ai->Addr.Variable.descr2 ); |
| 1126 | ai->Addr.Variable.descr2 = NULL; |
| 1127 | } |
| 1128 | /* Assume (assert) that VG_(get_data_description) fills in descr1 |
| 1129 | before it fills in descr2 */ |
| 1130 | if (ai->Addr.Variable.descr1 == NULL) |
| 1131 | tl_assert(ai->Addr.Variable.descr2 == NULL); |
| 1132 | /* So did we get lucky? */ |
| 1133 | if (ai->Addr.Variable.descr1 != NULL) { |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1134 | ai->tag = Addr_Variable; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1135 | return; |
| 1136 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1137 | /* -- Have a look at the low level data symbols - perhaps it's in |
| 1138 | there. -- */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1139 | VG_(memset)( &ai->Addr.DataSym.name, |
| 1140 | 0, sizeof(ai->Addr.DataSym.name)); |
| 1141 | if (VG_(get_datasym_and_offset)( |
| 1142 | a, &ai->Addr.DataSym.name[0], |
| 1143 | sizeof(ai->Addr.DataSym.name)-1, |
| 1144 | &ai->Addr.DataSym.offset )) { |
| 1145 | ai->tag = Addr_DataSym; |
| 1146 | tl_assert( ai->Addr.DataSym.name |
| 1147 | [ sizeof(ai->Addr.DataSym.name)-1 ] == 0); |
| 1148 | return; |
| 1149 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1150 | /* -- Perhaps it's on a thread's stack? -- */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1151 | VG_(thread_stack_reset_iter)(&tid); |
| 1152 | while ( VG_(thread_stack_next)(&tid, &stack_min, &stack_max) ) { |
| 1153 | if (stack_min - VG_STACK_REDZONE_SZB <= a && a <= stack_max) { |
| 1154 | ai->tag = Addr_Stack; |
| 1155 | ai->Addr.Stack.tid = tid; |
| 1156 | return; |
| 1157 | } |
| 1158 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1159 | /* -- last ditch attempt at classification -- */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1160 | tl_assert( sizeof(ai->Addr.SectKind.objname) > 4 ); |
| 1161 | VG_(memset)( &ai->Addr.SectKind.objname, |
| 1162 | 0, sizeof(ai->Addr.SectKind.objname)); |
| 1163 | VG_(strcpy)( ai->Addr.SectKind.objname, "???" ); |
sewardj | e3f1e59 | 2009-07-31 09:41:29 +0000 | [diff] [blame] | 1164 | sect = VG_(DebugInfo_sect_kind)( &ai->Addr.SectKind.objname[0], |
| 1165 | sizeof(ai->Addr.SectKind.objname)-1, a); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1166 | if (sect != Vg_SectUnknown) { |
| 1167 | ai->tag = Addr_SectKind; |
| 1168 | ai->Addr.SectKind.kind = sect; |
| 1169 | tl_assert( ai->Addr.SectKind.objname |
| 1170 | [ sizeof(ai->Addr.SectKind.objname)-1 ] == 0); |
| 1171 | return; |
| 1172 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1173 | /* -- Clueless ... -- */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1174 | ai->tag = Addr_Unknown; |
| 1175 | return; |
| 1176 | } |
| 1177 | |
| 1178 | /* Fill in *origin_ec as specified by otag, or NULL it out if otag |
| 1179 | does not refer to a known origin. */ |
| 1180 | static void update_origin ( /*OUT*/ExeContext** origin_ec, |
| 1181 | UInt otag ) |
| 1182 | { |
| 1183 | UInt ecu = otag & ~3; |
| 1184 | *origin_ec = NULL; |
| 1185 | if (VG_(is_plausible_ECU)(ecu)) { |
| 1186 | *origin_ec = VG_(get_ExeContext_from_ECU)( ecu ); |
| 1187 | } |
| 1188 | } |
| 1189 | |
| 1190 | /* Updates the copy with address info if necessary (but not for all errors). */ |
| 1191 | UInt MC_(update_Error_extra)( Error* err ) |
| 1192 | { |
| 1193 | MC_Error* extra = VG_(get_error_extra)(err); |
| 1194 | |
| 1195 | switch (VG_(get_error_kind)(err)) { |
| 1196 | // These ones don't have addresses associated with them, and so don't |
| 1197 | // need any updating. |
| 1198 | case Err_CoreMem: |
| 1199 | //case Err_Value: |
| 1200 | //case Err_Cond: |
| 1201 | case Err_Overlap: |
| 1202 | // For Err_Leaks the returned size does not matter -- they are always |
| 1203 | // shown with VG_(unique_error)() so they 'extra' not copied. But |
| 1204 | // we make it consistent with the others. |
| 1205 | case Err_Leak: |
| 1206 | return sizeof(MC_Error); |
| 1207 | |
| 1208 | // For value errors, get the ExeContext corresponding to the |
| 1209 | // origin tag. Note that it is a kludge to assume that |
| 1210 | // a length-1 trace indicates a stack origin. FIXME. |
| 1211 | case Err_Value: |
| 1212 | update_origin( &extra->Err.Value.origin_ec, |
| 1213 | extra->Err.Value.otag ); |
| 1214 | return sizeof(MC_Error); |
| 1215 | case Err_Cond: |
| 1216 | update_origin( &extra->Err.Cond.origin_ec, |
| 1217 | extra->Err.Cond.otag ); |
| 1218 | return sizeof(MC_Error); |
| 1219 | case Err_RegParam: |
| 1220 | update_origin( &extra->Err.RegParam.origin_ec, |
| 1221 | extra->Err.RegParam.otag ); |
| 1222 | return sizeof(MC_Error); |
| 1223 | |
| 1224 | // These ones always involve a memory address. |
| 1225 | case Err_Addr: |
| 1226 | describe_addr ( VG_(get_error_address)(err), |
| 1227 | &extra->Err.Addr.ai ); |
| 1228 | return sizeof(MC_Error); |
| 1229 | case Err_MemParam: |
| 1230 | describe_addr ( VG_(get_error_address)(err), |
| 1231 | &extra->Err.MemParam.ai ); |
| 1232 | update_origin( &extra->Err.MemParam.origin_ec, |
| 1233 | extra->Err.MemParam.otag ); |
| 1234 | return sizeof(MC_Error); |
| 1235 | case Err_Jump: |
| 1236 | describe_addr ( VG_(get_error_address)(err), |
| 1237 | &extra->Err.Jump.ai ); |
| 1238 | return sizeof(MC_Error); |
| 1239 | case Err_User: |
| 1240 | describe_addr ( VG_(get_error_address)(err), |
| 1241 | &extra->Err.User.ai ); |
| 1242 | update_origin( &extra->Err.User.origin_ec, |
| 1243 | extra->Err.User.otag ); |
| 1244 | return sizeof(MC_Error); |
| 1245 | case Err_Free: |
| 1246 | describe_addr ( VG_(get_error_address)(err), |
| 1247 | &extra->Err.Free.ai ); |
| 1248 | return sizeof(MC_Error); |
| 1249 | case Err_IllegalMempool: |
| 1250 | describe_addr ( VG_(get_error_address)(err), |
| 1251 | &extra->Err.IllegalMempool.ai ); |
| 1252 | return sizeof(MC_Error); |
| 1253 | |
| 1254 | // Err_FreeMismatches have already had their address described; this is |
| 1255 | // possible because we have the MC_Chunk on hand when the error is |
| 1256 | // detected. However, the address may be part of a user block, and if so |
| 1257 | // we override the pre-determined description with a user block one. |
| 1258 | case Err_FreeMismatch: { |
| 1259 | tl_assert(extra && Block_Mallocd == |
| 1260 | extra->Err.FreeMismatch.ai.Addr.Block.block_kind); |
| 1261 | (void)client_block_maybe_describe( VG_(get_error_address)(err), |
| 1262 | &extra->Err.FreeMismatch.ai ); |
| 1263 | return sizeof(MC_Error); |
| 1264 | } |
| 1265 | |
| 1266 | default: VG_(tool_panic)("mc_update_extra: bad errkind"); |
| 1267 | } |
| 1268 | } |
| 1269 | |
| 1270 | // FIXME: does this perhaps want to live somewhere else |
| 1271 | // in this file? |
| 1272 | static Bool client_block_maybe_describe( Addr a, |
| 1273 | /*OUT*/AddrInfo* ai ) |
| 1274 | { |
sewardj | 56adc35 | 2008-05-02 11:25:17 +0000 | [diff] [blame] | 1275 | UWord i; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1276 | CGenBlock* cgbs = NULL; |
| 1277 | UWord cgb_used = 0; |
sewardj | 56adc35 | 2008-05-02 11:25:17 +0000 | [diff] [blame] | 1278 | |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1279 | MC_(get_ClientBlock_array)( &cgbs, &cgb_used ); |
| 1280 | if (cgbs == NULL) |
| 1281 | tl_assert(cgb_used == 0); |
| 1282 | |
| 1283 | /* Perhaps it's a general block ? */ |
| 1284 | for (i = 0; i < cgb_used; i++) { |
| 1285 | if (cgbs[i].start == 0 && cgbs[i].size == 0) |
| 1286 | continue; |
| 1287 | // Use zero as the redzone for client blocks. |
| 1288 | if (VG_(addr_is_in_block)(a, cgbs[i].start, cgbs[i].size, 0)) { |
| 1289 | /* OK - maybe it's a mempool, too? */ |
| 1290 | MC_Mempool* mp = VG_(HT_lookup)(MC_(mempool_list), |
| 1291 | (UWord)cgbs[i].start); |
| 1292 | if (mp != NULL) { |
| 1293 | if (mp->chunks != NULL) { |
| 1294 | MC_Chunk* mc; |
| 1295 | VG_(HT_ResetIter)(mp->chunks); |
| 1296 | while ( (mc = VG_(HT_Next)(mp->chunks)) ) { |
| 1297 | if (addr_is_in_MC_Chunk(mc, a)) { |
| 1298 | ai->tag = Addr_Block; |
| 1299 | ai->Addr.Block.block_kind = Block_MempoolChunk; |
| 1300 | ai->Addr.Block.block_desc = "block"; |
| 1301 | ai->Addr.Block.block_szB = mc->szB; |
sewardj | 56adc35 | 2008-05-02 11:25:17 +0000 | [diff] [blame] | 1302 | ai->Addr.Block.rwoffset = (Word)a - (Word)mc->data; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1303 | ai->Addr.Block.lastchange = mc->where; |
| 1304 | return True; |
| 1305 | } |
| 1306 | } |
| 1307 | } |
| 1308 | ai->tag = Addr_Block; |
| 1309 | ai->Addr.Block.block_kind = Block_Mempool; |
| 1310 | ai->Addr.Block.block_desc = "mempool"; |
| 1311 | ai->Addr.Block.block_szB = cgbs[i].size; |
sewardj | 56adc35 | 2008-05-02 11:25:17 +0000 | [diff] [blame] | 1312 | ai->Addr.Block.rwoffset = (Word)(a) - (Word)(cgbs[i].start); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1313 | ai->Addr.Block.lastchange = cgbs[i].where; |
| 1314 | return True; |
| 1315 | } |
| 1316 | ai->tag = Addr_Block; |
| 1317 | ai->Addr.Block.block_kind = Block_UserG; |
| 1318 | ai->Addr.Block.block_desc = cgbs[i].desc; |
| 1319 | ai->Addr.Block.block_szB = cgbs[i].size; |
sewardj | 56adc35 | 2008-05-02 11:25:17 +0000 | [diff] [blame] | 1320 | ai->Addr.Block.rwoffset = (Word)(a) - (Word)(cgbs[i].start); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1321 | ai->Addr.Block.lastchange = cgbs[i].where; |
| 1322 | return True; |
| 1323 | } |
| 1324 | } |
| 1325 | return False; |
| 1326 | } |
| 1327 | |
| 1328 | |
| 1329 | /*------------------------------------------------------------*/ |
| 1330 | /*--- Suppressions ---*/ |
| 1331 | /*------------------------------------------------------------*/ |
| 1332 | |
| 1333 | typedef |
| 1334 | enum { |
| 1335 | ParamSupp, // Bad syscall params |
| 1336 | UserSupp, // Errors arising from client-request checks |
| 1337 | CoreMemSupp, // Memory errors in core (pthread ops, signal handling) |
| 1338 | |
| 1339 | // Undefined value errors of given size |
| 1340 | Value1Supp, Value2Supp, Value4Supp, Value8Supp, Value16Supp, |
| 1341 | |
| 1342 | // Undefined value error in conditional. |
| 1343 | CondSupp, |
| 1344 | |
| 1345 | // Unaddressable read/write attempt at given size |
| 1346 | Addr1Supp, Addr2Supp, Addr4Supp, Addr8Supp, Addr16Supp, |
| 1347 | |
| 1348 | JumpSupp, // Jump to unaddressable target |
| 1349 | FreeSupp, // Invalid or mismatching free |
| 1350 | OverlapSupp, // Overlapping blocks in memcpy(), strcpy(), etc |
| 1351 | LeakSupp, // Something to be suppressed in a leak check. |
| 1352 | MempoolSupp, // Memory pool suppression. |
| 1353 | } |
| 1354 | MC_SuppKind; |
| 1355 | |
| 1356 | Bool MC_(is_recognised_suppression) ( Char* name, Supp* su ) |
| 1357 | { |
| 1358 | SuppKind skind; |
| 1359 | |
| 1360 | if (VG_STREQ(name, "Param")) skind = ParamSupp; |
| 1361 | else if (VG_STREQ(name, "User")) skind = UserSupp; |
| 1362 | else if (VG_STREQ(name, "CoreMem")) skind = CoreMemSupp; |
| 1363 | else if (VG_STREQ(name, "Addr1")) skind = Addr1Supp; |
| 1364 | else if (VG_STREQ(name, "Addr2")) skind = Addr2Supp; |
| 1365 | else if (VG_STREQ(name, "Addr4")) skind = Addr4Supp; |
| 1366 | else if (VG_STREQ(name, "Addr8")) skind = Addr8Supp; |
| 1367 | else if (VG_STREQ(name, "Addr16")) skind = Addr16Supp; |
| 1368 | else if (VG_STREQ(name, "Jump")) skind = JumpSupp; |
| 1369 | else if (VG_STREQ(name, "Free")) skind = FreeSupp; |
| 1370 | else if (VG_STREQ(name, "Leak")) skind = LeakSupp; |
| 1371 | else if (VG_STREQ(name, "Overlap")) skind = OverlapSupp; |
| 1372 | else if (VG_STREQ(name, "Mempool")) skind = MempoolSupp; |
| 1373 | else if (VG_STREQ(name, "Cond")) skind = CondSupp; |
| 1374 | else if (VG_STREQ(name, "Value0")) skind = CondSupp; /* backwards compat */ |
| 1375 | else if (VG_STREQ(name, "Value1")) skind = Value1Supp; |
| 1376 | else if (VG_STREQ(name, "Value2")) skind = Value2Supp; |
| 1377 | else if (VG_STREQ(name, "Value4")) skind = Value4Supp; |
| 1378 | else if (VG_STREQ(name, "Value8")) skind = Value8Supp; |
| 1379 | else if (VG_STREQ(name, "Value16")) skind = Value16Supp; |
| 1380 | else |
| 1381 | return False; |
| 1382 | |
| 1383 | VG_(set_supp_kind)(su, skind); |
| 1384 | return True; |
| 1385 | } |
| 1386 | |
njn | 35db56c | 2009-07-24 07:38:29 +0000 | [diff] [blame] | 1387 | Bool MC_(read_extra_suppression_info) ( Int fd, Char** bufpp, |
| 1388 | SizeT* nBufp, Supp *su ) |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1389 | { |
| 1390 | Bool eof; |
| 1391 | |
| 1392 | if (VG_(get_supp_kind)(su) == ParamSupp) { |
bart | 050eec5 | 2009-07-27 12:03:03 +0000 | [diff] [blame] | 1393 | eof = VG_(get_line) ( fd, bufpp, nBufp, NULL ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1394 | if (eof) return False; |
njn | 35db56c | 2009-07-24 07:38:29 +0000 | [diff] [blame] | 1395 | VG_(set_supp_string)(su, VG_(strdup)("mc.resi.1", *bufpp)); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1396 | } |
| 1397 | return True; |
| 1398 | } |
| 1399 | |
| 1400 | Bool MC_(error_matches_suppression) ( Error* err, Supp* su ) |
| 1401 | { |
| 1402 | Int su_szB; |
| 1403 | MC_Error* extra = VG_(get_error_extra)(err); |
| 1404 | ErrorKind ekind = VG_(get_error_kind )(err); |
| 1405 | |
| 1406 | switch (VG_(get_supp_kind)(su)) { |
| 1407 | case ParamSupp: |
| 1408 | return ((ekind == Err_RegParam || ekind == Err_MemParam) |
| 1409 | && VG_STREQ(VG_(get_error_string)(err), |
| 1410 | VG_(get_supp_string)(su))); |
| 1411 | |
| 1412 | case UserSupp: |
| 1413 | return (ekind == Err_User); |
| 1414 | |
| 1415 | case CoreMemSupp: |
| 1416 | return (ekind == Err_CoreMem |
| 1417 | && VG_STREQ(VG_(get_error_string)(err), |
| 1418 | VG_(get_supp_string)(su))); |
| 1419 | |
| 1420 | case Value1Supp: su_szB = 1; goto value_case; |
| 1421 | case Value2Supp: su_szB = 2; goto value_case; |
| 1422 | case Value4Supp: su_szB = 4; goto value_case; |
| 1423 | case Value8Supp: su_szB = 8; goto value_case; |
| 1424 | case Value16Supp:su_szB =16; goto value_case; |
| 1425 | value_case: |
| 1426 | return (ekind == Err_Value && extra->Err.Value.szB == su_szB); |
| 1427 | |
| 1428 | case CondSupp: |
| 1429 | return (ekind == Err_Cond); |
| 1430 | |
| 1431 | case Addr1Supp: su_szB = 1; goto addr_case; |
| 1432 | case Addr2Supp: su_szB = 2; goto addr_case; |
| 1433 | case Addr4Supp: su_szB = 4; goto addr_case; |
| 1434 | case Addr8Supp: su_szB = 8; goto addr_case; |
| 1435 | case Addr16Supp:su_szB =16; goto addr_case; |
| 1436 | addr_case: |
| 1437 | return (ekind == Err_Addr && extra->Err.Addr.szB == su_szB); |
| 1438 | |
| 1439 | case JumpSupp: |
| 1440 | return (ekind == Err_Jump); |
| 1441 | |
| 1442 | case FreeSupp: |
| 1443 | return (ekind == Err_Free || ekind == Err_FreeMismatch); |
| 1444 | |
| 1445 | case OverlapSupp: |
| 1446 | return (ekind == Err_Overlap); |
| 1447 | |
| 1448 | case LeakSupp: |
| 1449 | return (ekind == Err_Leak); |
| 1450 | |
| 1451 | case MempoolSupp: |
| 1452 | return (ekind == Err_IllegalMempool); |
| 1453 | |
| 1454 | default: |
| 1455 | VG_(printf)("Error:\n" |
| 1456 | " unknown suppression type %d\n", |
| 1457 | VG_(get_supp_kind)(su)); |
| 1458 | VG_(tool_panic)("unknown suppression type in " |
| 1459 | "MC_(error_matches_suppression)"); |
| 1460 | } |
| 1461 | } |
| 1462 | |
| 1463 | Char* MC_(get_error_name) ( Error* err ) |
| 1464 | { |
| 1465 | switch (VG_(get_error_kind)(err)) { |
| 1466 | case Err_RegParam: return "Param"; |
| 1467 | case Err_MemParam: return "Param"; |
| 1468 | case Err_User: return "User"; |
| 1469 | case Err_FreeMismatch: return "Free"; |
| 1470 | case Err_IllegalMempool: return "Mempool"; |
| 1471 | case Err_Free: return "Free"; |
| 1472 | case Err_Jump: return "Jump"; |
| 1473 | case Err_CoreMem: return "CoreMem"; |
| 1474 | case Err_Overlap: return "Overlap"; |
| 1475 | case Err_Leak: return "Leak"; |
| 1476 | case Err_Cond: return "Cond"; |
| 1477 | case Err_Addr: { |
| 1478 | MC_Error* extra = VG_(get_error_extra)(err); |
| 1479 | switch ( extra->Err.Addr.szB ) { |
| 1480 | case 1: return "Addr1"; |
| 1481 | case 2: return "Addr2"; |
| 1482 | case 4: return "Addr4"; |
| 1483 | case 8: return "Addr8"; |
| 1484 | case 16: return "Addr16"; |
| 1485 | default: VG_(tool_panic)("unexpected size for Addr"); |
| 1486 | } |
| 1487 | } |
| 1488 | case Err_Value: { |
| 1489 | MC_Error* extra = VG_(get_error_extra)(err); |
| 1490 | switch ( extra->Err.Value.szB ) { |
| 1491 | case 1: return "Value1"; |
| 1492 | case 2: return "Value2"; |
| 1493 | case 4: return "Value4"; |
| 1494 | case 8: return "Value8"; |
| 1495 | case 16: return "Value16"; |
| 1496 | default: VG_(tool_panic)("unexpected size for Value"); |
| 1497 | } |
| 1498 | } |
| 1499 | default: VG_(tool_panic)("get_error_name: unexpected type"); |
| 1500 | } |
| 1501 | } |
| 1502 | |
sewardj | 588adef | 2009-08-15 22:41:51 +0000 | [diff] [blame] | 1503 | Bool MC_(get_extra_suppression_info) ( Error* err, |
| 1504 | /*OUT*/Char* buf, Int nBuf ) |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1505 | { |
| 1506 | ErrorKind ekind = VG_(get_error_kind )(err); |
sewardj | 588adef | 2009-08-15 22:41:51 +0000 | [diff] [blame] | 1507 | tl_assert(buf); |
| 1508 | tl_assert(nBuf >= 16); // stay sane |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1509 | if (Err_RegParam == ekind || Err_MemParam == ekind) { |
sewardj | 588adef | 2009-08-15 22:41:51 +0000 | [diff] [blame] | 1510 | Char* errstr = VG_(get_error_string)(err); |
| 1511 | tl_assert(errstr); |
| 1512 | VG_(snprintf)(buf, nBuf-1, "%s", errstr); |
| 1513 | return True; |
| 1514 | } else { |
| 1515 | return False; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1516 | } |
| 1517 | } |
| 1518 | |
| 1519 | |
| 1520 | /*--------------------------------------------------------------------*/ |
| 1521 | /*--- end mc_errors.c ---*/ |
| 1522 | /*--------------------------------------------------------------------*/ |