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 | ec062e8 | 2011-10-23 07:32:08 +0000 | [diff] [blame] | 11 | Copyright (C) 2000-2011 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 | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 33 | #include "pub_tool_gdbserver.h" |
philippe | 6643e96 | 2012-01-17 21:16:30 +0000 | [diff] [blame] | 34 | #include "pub_tool_poolalloc.h" // For mc_include.h |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 35 | #include "pub_tool_hashtable.h" // For mc_include.h |
| 36 | #include "pub_tool_libcbase.h" |
| 37 | #include "pub_tool_libcassert.h" |
| 38 | #include "pub_tool_libcprint.h" |
| 39 | #include "pub_tool_machine.h" |
| 40 | #include "pub_tool_mallocfree.h" |
| 41 | #include "pub_tool_options.h" |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 42 | #include "pub_tool_replacemalloc.h" |
| 43 | #include "pub_tool_tooliface.h" |
| 44 | #include "pub_tool_threadstate.h" |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 45 | #include "pub_tool_debuginfo.h" // VG_(get_dataname_and_offset) |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 46 | #include "pub_tool_xarray.h" |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 47 | |
| 48 | #include "mc_include.h" |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 49 | |
| 50 | |
| 51 | /*------------------------------------------------------------*/ |
| 52 | /*--- Error types ---*/ |
| 53 | /*------------------------------------------------------------*/ |
| 54 | |
| 55 | /* See comment in mc_include.h */ |
| 56 | Bool MC_(any_value_errors) = False; |
| 57 | |
| 58 | |
| 59 | // Different kinds of blocks. |
| 60 | typedef enum { |
| 61 | Block_Mallocd = 111, |
| 62 | Block_Freed, |
| 63 | Block_Mempool, |
| 64 | Block_MempoolChunk, |
| 65 | Block_UserG |
| 66 | } BlockKind; |
| 67 | |
| 68 | /* ------------------ Addresses -------------------- */ |
| 69 | |
| 70 | /* The classification of a faulting address. */ |
| 71 | typedef |
| 72 | enum { |
| 73 | Addr_Undescribed, // as-yet unclassified |
| 74 | Addr_Unknown, // classification yielded nothing useful |
| 75 | Addr_Block, // in malloc'd/free'd block |
| 76 | Addr_Stack, // on a thread's stack |
| 77 | Addr_DataSym, // in a global data sym |
| 78 | Addr_Variable, // variable described by the debug info |
| 79 | Addr_SectKind // last-ditch classification attempt |
| 80 | } |
| 81 | AddrTag; |
| 82 | |
| 83 | typedef |
| 84 | struct _AddrInfo |
| 85 | AddrInfo; |
| 86 | |
| 87 | struct _AddrInfo { |
| 88 | AddrTag tag; |
| 89 | union { |
| 90 | // As-yet unclassified. |
| 91 | struct { } Undescribed; |
| 92 | |
| 93 | // On a stack. |
| 94 | struct { |
| 95 | ThreadId tid; // Which thread's stack? |
| 96 | } Stack; |
| 97 | |
| 98 | // This covers heap blocks (normal and from mempools) and user-defined |
| 99 | // blocks. |
| 100 | struct { |
| 101 | BlockKind block_kind; |
| 102 | Char* block_desc; // "block", "mempool" or user-defined |
| 103 | SizeT block_szB; |
njn | c4431bf | 2009-01-15 21:29:24 +0000 | [diff] [blame] | 104 | PtrdiffT rwoffset; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 105 | ExeContext* lastchange; |
| 106 | } Block; |
| 107 | |
njn | c4431bf | 2009-01-15 21:29:24 +0000 | [diff] [blame] | 108 | // In a global .data symbol. This holds the first 127 chars of |
| 109 | // the variable's name (zero terminated), plus a (memory) offset. |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 110 | struct { |
njn | c4431bf | 2009-01-15 21:29:24 +0000 | [diff] [blame] | 111 | Char name[128]; |
| 112 | PtrdiffT offset; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 113 | } DataSym; |
| 114 | |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 115 | // Is described by Dwarf debug info. XArray*s of HChar. |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 116 | struct { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 117 | XArray* /* of HChar */ descr1; |
| 118 | XArray* /* of HChar */ descr2; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 119 | } Variable; |
| 120 | |
| 121 | // Could only narrow it down to be the PLT/GOT/etc of a given |
| 122 | // object. Better than nothing, perhaps. |
| 123 | struct { |
| 124 | Char objname[128]; |
| 125 | VgSectKind kind; |
| 126 | } SectKind; |
| 127 | |
| 128 | // Classification yielded nothing useful. |
| 129 | struct { } Unknown; |
| 130 | |
| 131 | } Addr; |
| 132 | }; |
| 133 | |
| 134 | /* ------------------ Errors ----------------------- */ |
| 135 | |
| 136 | /* What kind of error it is. */ |
| 137 | typedef |
| 138 | enum { |
| 139 | Err_Value, |
| 140 | Err_Cond, |
| 141 | Err_CoreMem, |
| 142 | Err_Addr, |
| 143 | Err_Jump, |
| 144 | Err_RegParam, |
| 145 | Err_MemParam, |
| 146 | Err_User, |
| 147 | Err_Free, |
| 148 | Err_FreeMismatch, |
| 149 | Err_Overlap, |
| 150 | Err_Leak, |
| 151 | Err_IllegalMempool, |
| 152 | } |
| 153 | MC_ErrorTag; |
| 154 | |
| 155 | |
| 156 | typedef struct _MC_Error MC_Error; |
| 157 | |
| 158 | struct _MC_Error { |
| 159 | // Nb: we don't need the tag here, as it's stored in the Error type! Yuk. |
| 160 | //MC_ErrorTag tag; |
| 161 | |
| 162 | union { |
| 163 | // Use of an undefined value: |
| 164 | // - as a pointer in a load or store |
| 165 | // - as a jump target |
| 166 | struct { |
| 167 | SizeT szB; // size of value in bytes |
| 168 | // Origin info |
| 169 | UInt otag; // origin tag |
| 170 | ExeContext* origin_ec; // filled in later |
| 171 | } Value; |
| 172 | |
| 173 | // Use of an undefined value in a conditional branch or move. |
| 174 | struct { |
| 175 | // Origin info |
| 176 | UInt otag; // origin tag |
| 177 | ExeContext* origin_ec; // filled in later |
| 178 | } Cond; |
| 179 | |
| 180 | // Addressability error in core (signal-handling) operation. |
| 181 | // It would be good to get rid of this error kind, merge it with |
| 182 | // another one somehow. |
| 183 | struct { |
| 184 | } CoreMem; |
| 185 | |
| 186 | // Use of an unaddressable memory location in a load or store. |
| 187 | struct { |
| 188 | Bool isWrite; // read or write? |
| 189 | SizeT szB; // not used for exec (jump) errors |
| 190 | Bool maybe_gcc; // True if just below %esp -- could be a gcc bug |
| 191 | AddrInfo ai; |
| 192 | } Addr; |
| 193 | |
| 194 | // Jump to an unaddressable memory location. |
| 195 | struct { |
| 196 | AddrInfo ai; |
| 197 | } Jump; |
| 198 | |
| 199 | // System call register input contains undefined bytes. |
| 200 | struct { |
| 201 | // Origin info |
| 202 | UInt otag; // origin tag |
| 203 | ExeContext* origin_ec; // filled in later |
| 204 | } RegParam; |
| 205 | |
| 206 | // System call memory input contains undefined/unaddressable bytes |
| 207 | struct { |
| 208 | Bool isAddrErr; // Addressability or definedness error? |
| 209 | AddrInfo ai; |
| 210 | // Origin info |
| 211 | UInt otag; // origin tag |
| 212 | ExeContext* origin_ec; // filled in later |
| 213 | } MemParam; |
| 214 | |
| 215 | // Problem found from a client request like CHECK_MEM_IS_ADDRESSABLE. |
| 216 | struct { |
| 217 | Bool isAddrErr; // Addressability or definedness error? |
| 218 | AddrInfo ai; |
| 219 | // Origin info |
| 220 | UInt otag; // origin tag |
| 221 | ExeContext* origin_ec; // filled in later |
| 222 | } User; |
| 223 | |
| 224 | // Program tried to free() something that's not a heap block (this |
| 225 | // covers double-frees). */ |
| 226 | struct { |
| 227 | AddrInfo ai; |
| 228 | } Free; |
| 229 | |
| 230 | // Program allocates heap block with one function |
| 231 | // (malloc/new/new[]/custom) and deallocates with not the matching one. |
| 232 | struct { |
| 233 | AddrInfo ai; |
| 234 | } FreeMismatch; |
| 235 | |
| 236 | // Call to strcpy, memcpy, etc, with overlapping blocks. |
| 237 | struct { |
| 238 | Addr src; // Source block |
| 239 | Addr dst; // Destination block |
| 240 | Int szB; // Size in bytes; 0 if unused. |
| 241 | } Overlap; |
| 242 | |
| 243 | // A memory leak. |
| 244 | struct { |
| 245 | UInt n_this_record; |
| 246 | UInt n_total_records; |
njn | b7a4e2e | 2009-05-01 00:30:43 +0000 | [diff] [blame] | 247 | LossRecord* lr; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 248 | } Leak; |
| 249 | |
| 250 | // A memory pool error. |
| 251 | struct { |
| 252 | AddrInfo ai; |
| 253 | } IllegalMempool; |
| 254 | |
| 255 | } Err; |
| 256 | }; |
| 257 | |
| 258 | |
| 259 | /*------------------------------------------------------------*/ |
| 260 | /*--- Printing errors ---*/ |
| 261 | /*------------------------------------------------------------*/ |
| 262 | |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 263 | /* This is the "this error is due to be printed shortly; so have a |
| 264 | look at it any print any preamble you want" function. Which, in |
| 265 | Memcheck, we don't use. Hence a no-op. |
| 266 | */ |
| 267 | void MC_(before_pp_Error) ( Error* err ) { |
| 268 | } |
| 269 | |
| 270 | /* Do a printf-style operation on either the XML or normal output |
| 271 | channel, depending on the setting of VG_(clo_xml). |
| 272 | */ |
| 273 | static void emit_WRK ( HChar* format, va_list vargs ) |
| 274 | { |
| 275 | if (VG_(clo_xml)) { |
| 276 | VG_(vprintf_xml)(format, vargs); |
| 277 | } else { |
| 278 | VG_(vmessage)(Vg_UserMsg, format, vargs); |
| 279 | } |
| 280 | } |
| 281 | static void emit ( HChar* format, ... ) PRINTF_CHECK(1, 2); |
| 282 | static void emit ( HChar* format, ... ) |
| 283 | { |
| 284 | va_list vargs; |
| 285 | va_start(vargs, format); |
| 286 | emit_WRK(format, vargs); |
| 287 | va_end(vargs); |
| 288 | } |
| 289 | static void emiN ( HChar* format, ... ) /* NO FORMAT CHECK */ |
| 290 | { |
| 291 | va_list vargs; |
| 292 | va_start(vargs, format); |
| 293 | emit_WRK(format, vargs); |
| 294 | va_end(vargs); |
| 295 | } |
| 296 | |
| 297 | |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 298 | static void mc_pp_AddrInfo ( Addr a, AddrInfo* ai, Bool maybe_gcc ) |
| 299 | { |
| 300 | HChar* xpre = VG_(clo_xml) ? " <auxwhat>" : " "; |
| 301 | HChar* xpost = VG_(clo_xml) ? "</auxwhat>" : ""; |
| 302 | |
| 303 | switch (ai->tag) { |
| 304 | case Addr_Unknown: |
| 305 | if (maybe_gcc) { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 306 | emit( "%sAddress 0x%llx is just below the stack ptr. " |
| 307 | "To suppress, use: --workaround-gcc296-bugs=yes%s\n", |
| 308 | xpre, (ULong)a, xpost ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 309 | } else { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 310 | emit( "%sAddress 0x%llx " |
| 311 | "is not stack'd, malloc'd or (recently) free'd%s\n", |
| 312 | xpre, (ULong)a, xpost ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 313 | } |
| 314 | break; |
| 315 | |
| 316 | case Addr_Stack: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 317 | emit( "%sAddress 0x%llx is on thread %d's stack%s\n", |
| 318 | xpre, (ULong)a, ai->Addr.Stack.tid, xpost ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 319 | break; |
| 320 | |
| 321 | case Addr_Block: { |
njn | c4431bf | 2009-01-15 21:29:24 +0000 | [diff] [blame] | 322 | SizeT block_szB = ai->Addr.Block.block_szB; |
| 323 | PtrdiffT rwoffset = ai->Addr.Block.rwoffset; |
| 324 | SizeT delta; |
| 325 | const Char* relative; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 326 | |
| 327 | if (rwoffset < 0) { |
| 328 | delta = (SizeT)(-rwoffset); |
| 329 | relative = "before"; |
| 330 | } else if (rwoffset >= block_szB) { |
| 331 | delta = rwoffset - block_szB; |
| 332 | relative = "after"; |
| 333 | } else { |
| 334 | delta = rwoffset; |
| 335 | relative = "inside"; |
| 336 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 337 | emit( |
| 338 | "%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] | 339 | xpre, |
| 340 | a, delta, relative, ai->Addr.Block.block_desc, |
| 341 | block_szB, |
| 342 | ai->Addr.Block.block_kind==Block_Mallocd ? "alloc'd" |
| 343 | : ai->Addr.Block.block_kind==Block_Freed ? "free'd" |
| 344 | : "client-defined", |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 345 | xpost |
| 346 | ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 347 | VG_(pp_ExeContext)(ai->Addr.Block.lastchange); |
| 348 | break; |
| 349 | } |
| 350 | |
| 351 | case Addr_DataSym: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 352 | emiN( "%sAddress 0x%llx is %llu bytes " |
bart | b3af9cf | 2011-10-06 19:08:37 +0000 | [diff] [blame] | 353 | "inside data symbol \"%pS\"%s\n", |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 354 | xpre, |
| 355 | (ULong)a, |
| 356 | (ULong)ai->Addr.DataSym.offset, |
| 357 | ai->Addr.DataSym.name, |
| 358 | xpost ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 359 | break; |
| 360 | |
| 361 | case Addr_Variable: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 362 | /* Note, no need for XML tags here, because descr1/2 will |
| 363 | already have <auxwhat> or <xauxwhat>s on them, in XML |
| 364 | mode. */ |
| 365 | if (ai->Addr.Variable.descr1) |
| 366 | emit( "%s%s\n", |
| 367 | VG_(clo_xml) ? " " : " ", |
| 368 | (HChar*)VG_(indexXA)(ai->Addr.Variable.descr1, 0) ); |
| 369 | if (ai->Addr.Variable.descr2) |
| 370 | emit( "%s%s\n", |
| 371 | VG_(clo_xml) ? " " : " ", |
| 372 | (HChar*)VG_(indexXA)(ai->Addr.Variable.descr2, 0) ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 373 | break; |
| 374 | |
| 375 | case Addr_SectKind: |
bart | b3af9cf | 2011-10-06 19:08:37 +0000 | [diff] [blame] | 376 | emiN( "%sAddress 0x%llx is in the %pS segment of %pS%s\n", |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 377 | xpre, |
| 378 | (ULong)a, |
| 379 | VG_(pp_SectKind)(ai->Addr.SectKind.kind), |
| 380 | ai->Addr.SectKind.objname, |
| 381 | xpost ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 382 | break; |
| 383 | |
| 384 | default: |
| 385 | VG_(tool_panic)("mc_pp_AddrInfo"); |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | static const HChar* str_leak_lossmode ( Reachedness lossmode ) |
| 390 | { |
| 391 | const HChar *loss = "?"; |
| 392 | switch (lossmode) { |
| 393 | case Unreached: loss = "definitely lost"; break; |
| 394 | case IndirectLeak: loss = "indirectly lost"; break; |
njn | 8225cc0 | 2009-03-09 22:52:24 +0000 | [diff] [blame] | 395 | case Possible: loss = "possibly lost"; break; |
| 396 | case Reachable: loss = "still reachable"; break; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 397 | } |
| 398 | return loss; |
| 399 | } |
| 400 | |
| 401 | static const HChar* xml_leak_kind ( Reachedness lossmode ) |
| 402 | { |
| 403 | const HChar *loss = "?"; |
| 404 | switch (lossmode) { |
| 405 | case Unreached: loss = "Leak_DefinitelyLost"; break; |
| 406 | case IndirectLeak: loss = "Leak_IndirectlyLost"; break; |
njn | 8225cc0 | 2009-03-09 22:52:24 +0000 | [diff] [blame] | 407 | case Possible: loss = "Leak_PossiblyLost"; break; |
| 408 | case Reachable: loss = "Leak_StillReachable"; break; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 409 | } |
| 410 | return loss; |
| 411 | } |
| 412 | |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 413 | static void mc_pp_origin ( ExeContext* ec, UInt okind ) |
| 414 | { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 415 | HChar* src = NULL; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 416 | tl_assert(ec); |
| 417 | |
| 418 | switch (okind) { |
| 419 | case MC_OKIND_STACK: src = " by a stack allocation"; break; |
| 420 | case MC_OKIND_HEAP: src = " by a heap allocation"; break; |
| 421 | case MC_OKIND_USER: src = " by a client request"; break; |
| 422 | case MC_OKIND_UNKNOWN: src = ""; break; |
| 423 | } |
| 424 | tl_assert(src); /* guards against invalid 'okind' */ |
| 425 | |
| 426 | if (VG_(clo_xml)) { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 427 | emit( " <auxwhat>Uninitialised value was created%s</auxwhat>\n", |
| 428 | src); |
| 429 | VG_(pp_ExeContext)( ec ); |
| 430 | } else { |
| 431 | emit( " Uninitialised value was created%s\n", src); |
| 432 | VG_(pp_ExeContext)( ec ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 433 | } |
| 434 | } |
| 435 | |
sewardj | c8bd1df | 2011-06-26 12:41:33 +0000 | [diff] [blame] | 436 | char * MC_(snprintf_delta) (char * buf, Int size, |
| 437 | SizeT current_val, SizeT old_val, |
| 438 | LeakCheckDeltaMode delta_mode) |
| 439 | { |
| 440 | if (delta_mode == LCD_Any) |
| 441 | buf[0] = '\0'; |
| 442 | else if (current_val >= old_val) |
| 443 | VG_(snprintf) (buf, size, " (+%'lu)", current_val - old_val); |
| 444 | else |
| 445 | VG_(snprintf) (buf, size, " (-%'lu)", old_val - current_val); |
| 446 | |
| 447 | return buf; |
| 448 | } |
| 449 | |
philippe | a22f59d | 2012-01-26 23:13:52 +0000 | [diff] [blame] | 450 | static void pp_LossRecord(UInt n_this_record, UInt n_total_records, |
| 451 | LossRecord* lr, Bool xml) |
| 452 | { |
| 453 | // char arrays to produce the indication of increase/decrease in case |
| 454 | // of delta_mode != LCD_Any |
| 455 | char d_bytes[20]; |
| 456 | char d_direct_bytes[20]; |
| 457 | char d_indirect_bytes[20]; |
| 458 | char d_num_blocks[20]; |
| 459 | |
| 460 | MC_(snprintf_delta) (d_bytes, 20, |
| 461 | lr->szB + lr->indirect_szB, |
| 462 | lr->old_szB + lr->old_indirect_szB, |
| 463 | MC_(detect_memory_leaks_last_delta_mode)); |
| 464 | MC_(snprintf_delta) (d_direct_bytes, 20, |
| 465 | lr->szB, |
| 466 | lr->old_szB, |
| 467 | MC_(detect_memory_leaks_last_delta_mode)); |
| 468 | MC_(snprintf_delta) (d_indirect_bytes, 20, |
| 469 | lr->indirect_szB, |
| 470 | lr->old_indirect_szB, |
| 471 | MC_(detect_memory_leaks_last_delta_mode)); |
| 472 | MC_(snprintf_delta) (d_num_blocks, 20, |
| 473 | (SizeT) lr->num_blocks, |
| 474 | (SizeT) lr->old_num_blocks, |
| 475 | MC_(detect_memory_leaks_last_delta_mode)); |
| 476 | |
| 477 | if (xml) { |
| 478 | emit(" <kind>%s</kind>\n", xml_leak_kind(lr->key.state)); |
| 479 | if (lr->indirect_szB > 0) { |
| 480 | emit( " <xwhat>\n" ); |
| 481 | emit( " <text>%'lu%s (%'lu%s direct, %'lu%s indirect) bytes " |
| 482 | "in %'u%s blocks" |
| 483 | " are %s in loss record %'u of %'u</text>\n", |
| 484 | lr->szB + lr->indirect_szB, d_bytes, |
| 485 | lr->szB, d_direct_bytes, |
| 486 | lr->indirect_szB, d_indirect_bytes, |
| 487 | lr->num_blocks, d_num_blocks, |
| 488 | str_leak_lossmode(lr->key.state), |
| 489 | n_this_record, n_total_records ); |
| 490 | // Nb: don't put commas in these XML numbers |
| 491 | emit( " <leakedbytes>%lu</leakedbytes>\n", |
| 492 | lr->szB + lr->indirect_szB ); |
| 493 | emit( " <leakedblocks>%u</leakedblocks>\n", lr->num_blocks ); |
| 494 | emit( " </xwhat>\n" ); |
| 495 | } else { |
| 496 | emit( " <xwhat>\n" ); |
| 497 | emit( " <text>%'lu%s bytes in %'u%s blocks" |
| 498 | " are %s in loss record %'u of %'u</text>\n", |
| 499 | lr->szB, d_direct_bytes, |
| 500 | lr->num_blocks, d_num_blocks, |
| 501 | str_leak_lossmode(lr->key.state), |
| 502 | n_this_record, n_total_records ); |
| 503 | emit( " <leakedbytes>%ld</leakedbytes>\n", lr->szB); |
| 504 | emit( " <leakedblocks>%d</leakedblocks>\n", lr->num_blocks); |
| 505 | emit( " </xwhat>\n" ); |
| 506 | } |
| 507 | VG_(pp_ExeContext)(lr->key.allocated_at); |
| 508 | } else { /* ! if (xml) */ |
| 509 | if (lr->indirect_szB > 0) { |
| 510 | emit( |
| 511 | "%'lu%s (%'lu%s direct, %'lu%s indirect) bytes in %'u%s blocks" |
| 512 | " are %s in loss record %'u of %'u\n", |
| 513 | lr->szB + lr->indirect_szB, d_bytes, |
| 514 | lr->szB, d_direct_bytes, |
| 515 | lr->indirect_szB, d_indirect_bytes, |
| 516 | lr->num_blocks, d_num_blocks, |
| 517 | str_leak_lossmode(lr->key.state), |
| 518 | n_this_record, n_total_records |
| 519 | ); |
| 520 | } else { |
| 521 | emit( |
| 522 | "%'lu%s bytes in %'u%s blocks are %s in loss record %'u of %'u\n", |
| 523 | lr->szB, d_direct_bytes, |
| 524 | lr->num_blocks, d_num_blocks, |
| 525 | str_leak_lossmode(lr->key.state), |
| 526 | n_this_record, n_total_records |
| 527 | ); |
| 528 | } |
| 529 | VG_(pp_ExeContext)(lr->key.allocated_at); |
| 530 | } /* if (xml) */ |
| 531 | } |
| 532 | |
| 533 | void MC_(pp_LossRecord)(UInt n_this_record, UInt n_total_records, |
| 534 | LossRecord* l) |
| 535 | { |
| 536 | pp_LossRecord (n_this_record, n_total_records, l, /* xml */ False); |
| 537 | } |
| 538 | |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 539 | void MC_(pp_Error) ( Error* err ) |
| 540 | { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 541 | const Bool xml = VG_(clo_xml); /* a shorthand */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 542 | MC_Error* extra = VG_(get_error_extra)(err); |
| 543 | |
| 544 | switch (VG_(get_error_kind)(err)) { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 545 | case Err_CoreMem: |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 546 | /* What the hell *is* a CoreMemError? jrs 2005-May-18 */ |
| 547 | /* As of 2006-Dec-14, it's caused by unaddressable bytes in a |
| 548 | signal handler frame. --njn */ |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 549 | // JRS 17 May 09: None of our regtests exercise this; hence AFAIK |
| 550 | // the following code is untested. Bad. |
| 551 | if (xml) { |
| 552 | emit( " <kind>CoreMemError</kind>\n" ); |
bart | b3af9cf | 2011-10-06 19:08:37 +0000 | [diff] [blame] | 553 | emiN( " <what>%pS contains unaddressable byte(s)</what>\n", |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 554 | VG_(get_error_string)(err)); |
| 555 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 556 | } else { |
| 557 | emit( "%s contains unaddressable byte(s)\n", |
| 558 | VG_(get_error_string)(err)); |
| 559 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 560 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 561 | break; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 562 | |
| 563 | case Err_Value: |
| 564 | MC_(any_value_errors) = True; |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 565 | if (xml) { |
| 566 | emit( " <kind>UninitValue</kind>\n" ); |
| 567 | emit( " <what>Use of uninitialised value of size %ld</what>\n", |
| 568 | extra->Err.Value.szB ); |
| 569 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 570 | if (extra->Err.Value.origin_ec) |
| 571 | mc_pp_origin( extra->Err.Value.origin_ec, |
| 572 | extra->Err.Value.otag & 3 ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 573 | } else { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 574 | /* Could also show extra->Err.Cond.otag if debugging origin |
| 575 | tracking */ |
| 576 | emit( "Use of uninitialised value of size %ld\n", |
| 577 | extra->Err.Value.szB ); |
| 578 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 579 | if (extra->Err.Value.origin_ec) |
| 580 | mc_pp_origin( extra->Err.Value.origin_ec, |
| 581 | extra->Err.Value.otag & 3 ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 582 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 583 | break; |
| 584 | |
| 585 | case Err_Cond: |
| 586 | MC_(any_value_errors) = True; |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 587 | if (xml) { |
| 588 | emit( " <kind>UninitCondition</kind>\n" ); |
| 589 | emit( " <what>Conditional jump or move depends" |
| 590 | " on uninitialised value(s)</what>\n" ); |
| 591 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 592 | if (extra->Err.Cond.origin_ec) |
| 593 | mc_pp_origin( extra->Err.Cond.origin_ec, |
| 594 | extra->Err.Cond.otag & 3 ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 595 | } else { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 596 | /* Could also show extra->Err.Cond.otag if debugging origin |
| 597 | tracking */ |
| 598 | emit( "Conditional jump or move depends" |
| 599 | " on uninitialised value(s)\n" ); |
| 600 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 601 | if (extra->Err.Cond.origin_ec) |
| 602 | mc_pp_origin( extra->Err.Cond.origin_ec, |
| 603 | extra->Err.Cond.otag & 3 ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 604 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 605 | break; |
| 606 | |
| 607 | case Err_RegParam: |
| 608 | MC_(any_value_errors) = True; |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 609 | if (xml) { |
| 610 | emit( " <kind>SyscallParam</kind>\n" ); |
bart | b3af9cf | 2011-10-06 19:08:37 +0000 | [diff] [blame] | 611 | emiN( " <what>Syscall param %pS contains " |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 612 | "uninitialised byte(s)</what>\n", |
| 613 | VG_(get_error_string)(err) ); |
| 614 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 615 | if (extra->Err.RegParam.origin_ec) |
| 616 | mc_pp_origin( extra->Err.RegParam.origin_ec, |
| 617 | extra->Err.RegParam.otag & 3 ); |
| 618 | } else { |
| 619 | emit( "Syscall param %s contains uninitialised byte(s)\n", |
| 620 | VG_(get_error_string)(err) ); |
| 621 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 622 | if (extra->Err.RegParam.origin_ec) |
| 623 | mc_pp_origin( extra->Err.RegParam.origin_ec, |
| 624 | extra->Err.RegParam.otag & 3 ); |
| 625 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 626 | break; |
| 627 | |
| 628 | case Err_MemParam: |
| 629 | if (!extra->Err.MemParam.isAddrErr) |
| 630 | MC_(any_value_errors) = True; |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 631 | if (xml) { |
| 632 | emit( " <kind>SyscallParam</kind>\n" ); |
bart | b3af9cf | 2011-10-06 19:08:37 +0000 | [diff] [blame] | 633 | emiN( " <what>Syscall param %pS points to %s byte(s)</what>\n", |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 634 | VG_(get_error_string)(err), |
| 635 | extra->Err.MemParam.isAddrErr |
| 636 | ? "unaddressable" : "uninitialised" ); |
| 637 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 638 | mc_pp_AddrInfo(VG_(get_error_address)(err), |
| 639 | &extra->Err.MemParam.ai, False); |
| 640 | if (extra->Err.MemParam.origin_ec |
| 641 | && !extra->Err.MemParam.isAddrErr) |
| 642 | mc_pp_origin( extra->Err.MemParam.origin_ec, |
| 643 | extra->Err.MemParam.otag & 3 ); |
| 644 | } else { |
| 645 | emit( "Syscall param %s points to %s byte(s)\n", |
| 646 | VG_(get_error_string)(err), |
| 647 | extra->Err.MemParam.isAddrErr |
| 648 | ? "unaddressable" : "uninitialised" ); |
| 649 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 650 | mc_pp_AddrInfo(VG_(get_error_address)(err), |
| 651 | &extra->Err.MemParam.ai, False); |
| 652 | if (extra->Err.MemParam.origin_ec |
| 653 | && !extra->Err.MemParam.isAddrErr) |
| 654 | mc_pp_origin( extra->Err.MemParam.origin_ec, |
| 655 | extra->Err.MemParam.otag & 3 ); |
| 656 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 657 | break; |
| 658 | |
| 659 | case Err_User: |
| 660 | if (!extra->Err.User.isAddrErr) |
| 661 | MC_(any_value_errors) = True; |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 662 | if (xml) { |
| 663 | emit( " <kind>ClientCheck</kind>\n" ); |
| 664 | emit( " <what>%s byte(s) found " |
| 665 | "during client check request</what>\n", |
| 666 | extra->Err.User.isAddrErr |
| 667 | ? "Unaddressable" : "Uninitialised" ); |
| 668 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 669 | mc_pp_AddrInfo(VG_(get_error_address)(err), &extra->Err.User.ai, |
| 670 | False); |
| 671 | if (extra->Err.User.origin_ec && !extra->Err.User.isAddrErr) |
| 672 | mc_pp_origin( extra->Err.User.origin_ec, |
| 673 | extra->Err.User.otag & 3 ); |
| 674 | } else { |
| 675 | emit( "%s byte(s) found during client check request\n", |
| 676 | extra->Err.User.isAddrErr |
| 677 | ? "Unaddressable" : "Uninitialised" ); |
| 678 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 679 | mc_pp_AddrInfo(VG_(get_error_address)(err), &extra->Err.User.ai, |
| 680 | False); |
| 681 | if (extra->Err.User.origin_ec && !extra->Err.User.isAddrErr) |
| 682 | mc_pp_origin( extra->Err.User.origin_ec, |
| 683 | extra->Err.User.otag & 3 ); |
| 684 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 685 | break; |
| 686 | |
| 687 | case Err_Free: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 688 | if (xml) { |
| 689 | emit( " <kind>InvalidFree</kind>\n" ); |
bart | 9134738 | 2011-03-25 20:07:25 +0000 | [diff] [blame] | 690 | emit( " <what>Invalid free() / delete / delete[]" |
| 691 | " / realloc()</what>\n" ); |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 692 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 693 | mc_pp_AddrInfo( VG_(get_error_address)(err), |
| 694 | &extra->Err.Free.ai, False ); |
| 695 | } else { |
bart | 9134738 | 2011-03-25 20:07:25 +0000 | [diff] [blame] | 696 | emit( "Invalid free() / delete / delete[] / realloc()\n" ); |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 697 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 698 | mc_pp_AddrInfo( VG_(get_error_address)(err), |
| 699 | &extra->Err.Free.ai, False ); |
| 700 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 701 | break; |
| 702 | |
| 703 | case Err_FreeMismatch: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 704 | if (xml) { |
| 705 | emit( " <kind>MismatchedFree</kind>\n" ); |
| 706 | emit( " <what>Mismatched free() / delete / delete []</what>\n" ); |
| 707 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 708 | mc_pp_AddrInfo(VG_(get_error_address)(err), |
| 709 | &extra->Err.FreeMismatch.ai, False); |
| 710 | } else { |
| 711 | emit( "Mismatched free() / delete / delete []\n" ); |
| 712 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 713 | mc_pp_AddrInfo(VG_(get_error_address)(err), |
| 714 | &extra->Err.FreeMismatch.ai, False); |
| 715 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 716 | break; |
| 717 | |
| 718 | case Err_Addr: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 719 | if (xml) { |
| 720 | emit( " <kind>Invalid%s</kind>\n", |
| 721 | extra->Err.Addr.isWrite ? "Write" : "Read" ); |
| 722 | emit( " <what>Invalid %s of size %ld</what>\n", |
| 723 | extra->Err.Addr.isWrite ? "write" : "read", |
| 724 | extra->Err.Addr.szB ); |
| 725 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 726 | mc_pp_AddrInfo( VG_(get_error_address)(err), |
| 727 | &extra->Err.Addr.ai, |
| 728 | extra->Err.Addr.maybe_gcc ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 729 | } else { |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 730 | emit( "Invalid %s of size %ld\n", |
| 731 | extra->Err.Addr.isWrite ? "write" : "read", |
| 732 | extra->Err.Addr.szB ); |
| 733 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 734 | |
| 735 | mc_pp_AddrInfo( VG_(get_error_address)(err), |
| 736 | &extra->Err.Addr.ai, |
| 737 | extra->Err.Addr.maybe_gcc ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 738 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 739 | break; |
| 740 | |
| 741 | case Err_Jump: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 742 | if (xml) { |
| 743 | emit( " <kind>InvalidJump</kind>\n" ); |
| 744 | emit( " <what>Jump to the invalid address stated " |
| 745 | "on the next line</what>\n" ); |
| 746 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 747 | mc_pp_AddrInfo( VG_(get_error_address)(err), &extra->Err.Jump.ai, |
| 748 | False ); |
| 749 | } else { |
| 750 | emit( "Jump to the invalid address stated on the next line\n" ); |
| 751 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 752 | mc_pp_AddrInfo( VG_(get_error_address)(err), &extra->Err.Jump.ai, |
| 753 | False ); |
| 754 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 755 | break; |
| 756 | |
| 757 | case Err_Overlap: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 758 | if (xml) { |
| 759 | emit( " <kind>Overlap</kind>\n" ); |
| 760 | if (extra->Err.Overlap.szB == 0) { |
| 761 | emiN( " <what>Source and destination overlap " |
bart | b3af9cf | 2011-10-06 19:08:37 +0000 | [diff] [blame] | 762 | "in %pS(%#lx, %#lx)\n</what>\n", |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 763 | VG_(get_error_string)(err), |
| 764 | extra->Err.Overlap.dst, extra->Err.Overlap.src ); |
| 765 | } else { |
| 766 | emit( " <what>Source and destination overlap " |
| 767 | "in %s(%#lx, %#lx, %d)</what>\n", |
| 768 | VG_(get_error_string)(err), |
| 769 | extra->Err.Overlap.dst, extra->Err.Overlap.src, |
| 770 | extra->Err.Overlap.szB ); |
| 771 | } |
| 772 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 773 | } else { |
| 774 | if (extra->Err.Overlap.szB == 0) { |
bart | b3af9cf | 2011-10-06 19:08:37 +0000 | [diff] [blame] | 775 | emiN( "Source and destination overlap in %pS(%#lx, %#lx)\n", |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 776 | VG_(get_error_string)(err), |
| 777 | extra->Err.Overlap.dst, extra->Err.Overlap.src ); |
| 778 | } else { |
| 779 | emit( "Source and destination overlap in %s(%#lx, %#lx, %d)\n", |
| 780 | VG_(get_error_string)(err), |
| 781 | extra->Err.Overlap.dst, extra->Err.Overlap.src, |
| 782 | extra->Err.Overlap.szB ); |
| 783 | } |
| 784 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 785 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 786 | break; |
| 787 | |
| 788 | case Err_IllegalMempool: |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 789 | // JRS 17 May 09: None of our regtests exercise this; hence AFAIK |
| 790 | // the following code is untested. Bad. |
| 791 | if (xml) { |
| 792 | emit( " <kind>InvalidMemPool</kind>\n" ); |
| 793 | emit( " <what>Illegal memory pool address</what>\n" ); |
| 794 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 795 | mc_pp_AddrInfo( VG_(get_error_address)(err), |
| 796 | &extra->Err.IllegalMempool.ai, False ); |
| 797 | } else { |
| 798 | emit( "Illegal memory pool address\n" ); |
| 799 | VG_(pp_ExeContext)( VG_(get_error_where)(err) ); |
| 800 | mc_pp_AddrInfo( VG_(get_error_address)(err), |
| 801 | &extra->Err.IllegalMempool.ai, False ); |
| 802 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 803 | break; |
| 804 | |
| 805 | case Err_Leak: { |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 806 | UInt n_this_record = extra->Err.Leak.n_this_record; |
| 807 | UInt n_total_records = extra->Err.Leak.n_total_records; |
njn | b7a4e2e | 2009-05-01 00:30:43 +0000 | [diff] [blame] | 808 | LossRecord* lr = extra->Err.Leak.lr; |
philippe | a22f59d | 2012-01-26 23:13:52 +0000 | [diff] [blame] | 809 | pp_LossRecord (n_this_record, n_total_records, lr, xml); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 810 | break; |
| 811 | } |
| 812 | |
| 813 | default: |
| 814 | VG_(printf)("Error:\n unknown Memcheck error code %d\n", |
| 815 | VG_(get_error_kind)(err)); |
| 816 | VG_(tool_panic)("unknown error code in mc_pp_Error)"); |
| 817 | } |
| 818 | } |
| 819 | |
| 820 | /*------------------------------------------------------------*/ |
| 821 | /*--- Recording errors ---*/ |
| 822 | /*------------------------------------------------------------*/ |
| 823 | |
| 824 | /* These many bytes below %ESP are considered addressible if we're |
| 825 | doing the --workaround-gcc296-bugs hack. */ |
| 826 | #define VG_GCC296_BUG_STACK_SLOP 1024 |
| 827 | |
| 828 | /* Is this address within some small distance below %ESP? Used only |
| 829 | for the --workaround-gcc296-bugs kludge. */ |
| 830 | static Bool is_just_below_ESP( Addr esp, Addr aa ) |
| 831 | { |
sewardj | 7d751b2 | 2010-07-21 12:46:44 +0000 | [diff] [blame] | 832 | esp -= VG_STACK_REDZONE_SZB; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 833 | if (esp > aa && (esp - aa) <= VG_GCC296_BUG_STACK_SLOP) |
| 834 | return True; |
| 835 | else |
| 836 | return False; |
| 837 | } |
| 838 | |
| 839 | /* --- Called from generated and non-generated code --- */ |
| 840 | |
| 841 | void MC_(record_address_error) ( ThreadId tid, Addr a, Int szB, |
| 842 | Bool isWrite ) |
| 843 | { |
| 844 | MC_Error extra; |
| 845 | Bool just_below_esp; |
| 846 | |
| 847 | if (MC_(in_ignored_range)(a)) |
| 848 | return; |
| 849 | |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 850 | if (VG_(is_watched)( (isWrite ? write_watchpoint : read_watchpoint), a, szB)) |
| 851 | return; |
| 852 | |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 853 | just_below_esp = is_just_below_ESP( VG_(get_SP)(tid), a ); |
| 854 | |
| 855 | /* If this is caused by an access immediately below %ESP, and the |
| 856 | user asks nicely, we just ignore it. */ |
| 857 | if (MC_(clo_workaround_gcc296_bugs) && just_below_esp) |
| 858 | return; |
| 859 | |
| 860 | extra.Err.Addr.isWrite = isWrite; |
| 861 | extra.Err.Addr.szB = szB; |
| 862 | extra.Err.Addr.maybe_gcc = just_below_esp; |
| 863 | extra.Err.Addr.ai.tag = Addr_Undescribed; |
| 864 | VG_(maybe_record_error)( tid, Err_Addr, a, /*s*/NULL, &extra ); |
| 865 | } |
| 866 | |
| 867 | void MC_(record_value_error) ( ThreadId tid, Int szB, UInt otag ) |
| 868 | { |
| 869 | MC_Error extra; |
| 870 | tl_assert( MC_(clo_mc_level) >= 2 ); |
| 871 | if (otag > 0) |
| 872 | tl_assert( MC_(clo_mc_level) == 3 ); |
| 873 | extra.Err.Value.szB = szB; |
| 874 | extra.Err.Value.otag = otag; |
| 875 | extra.Err.Value.origin_ec = NULL; /* Filled in later */ |
| 876 | VG_(maybe_record_error)( tid, Err_Value, /*addr*/0, /*s*/NULL, &extra ); |
| 877 | } |
| 878 | |
| 879 | void MC_(record_cond_error) ( ThreadId tid, UInt otag ) |
| 880 | { |
| 881 | MC_Error extra; |
| 882 | tl_assert( MC_(clo_mc_level) >= 2 ); |
| 883 | if (otag > 0) |
| 884 | tl_assert( MC_(clo_mc_level) == 3 ); |
| 885 | extra.Err.Cond.otag = otag; |
| 886 | extra.Err.Cond.origin_ec = NULL; /* Filled in later */ |
| 887 | VG_(maybe_record_error)( tid, Err_Cond, /*addr*/0, /*s*/NULL, &extra ); |
| 888 | } |
| 889 | |
| 890 | /* --- Called from non-generated code --- */ |
| 891 | |
njn | 1dcee09 | 2009-02-24 03:07:37 +0000 | [diff] [blame] | 892 | /* This is for memory errors in signal-related memory. */ |
| 893 | void MC_(record_core_mem_error) ( ThreadId tid, Char* msg ) |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 894 | { |
| 895 | VG_(maybe_record_error)( tid, Err_CoreMem, /*addr*/0, msg, /*extra*/NULL ); |
| 896 | } |
| 897 | |
| 898 | void MC_(record_regparam_error) ( ThreadId tid, Char* msg, UInt otag ) |
| 899 | { |
| 900 | MC_Error extra; |
| 901 | tl_assert(VG_INVALID_THREADID != tid); |
| 902 | if (otag > 0) |
| 903 | tl_assert( MC_(clo_mc_level) == 3 ); |
| 904 | extra.Err.RegParam.otag = otag; |
| 905 | extra.Err.RegParam.origin_ec = NULL; /* Filled in later */ |
| 906 | VG_(maybe_record_error)( tid, Err_RegParam, /*addr*/0, msg, &extra ); |
| 907 | } |
| 908 | |
| 909 | void MC_(record_memparam_error) ( ThreadId tid, Addr a, |
| 910 | Bool isAddrErr, Char* msg, UInt otag ) |
| 911 | { |
| 912 | MC_Error extra; |
| 913 | tl_assert(VG_INVALID_THREADID != tid); |
| 914 | if (!isAddrErr) |
| 915 | tl_assert( MC_(clo_mc_level) >= 2 ); |
| 916 | if (otag != 0) { |
| 917 | tl_assert( MC_(clo_mc_level) == 3 ); |
| 918 | tl_assert( !isAddrErr ); |
| 919 | } |
| 920 | extra.Err.MemParam.isAddrErr = isAddrErr; |
| 921 | extra.Err.MemParam.ai.tag = Addr_Undescribed; |
| 922 | extra.Err.MemParam.otag = otag; |
| 923 | extra.Err.MemParam.origin_ec = NULL; /* Filled in later */ |
| 924 | VG_(maybe_record_error)( tid, Err_MemParam, a, msg, &extra ); |
| 925 | } |
| 926 | |
| 927 | void MC_(record_jump_error) ( ThreadId tid, Addr a ) |
| 928 | { |
| 929 | MC_Error extra; |
| 930 | tl_assert(VG_INVALID_THREADID != tid); |
| 931 | extra.Err.Jump.ai.tag = Addr_Undescribed; |
| 932 | VG_(maybe_record_error)( tid, Err_Jump, a, /*s*/NULL, &extra ); |
| 933 | } |
| 934 | |
| 935 | void MC_(record_free_error) ( ThreadId tid, Addr a ) |
| 936 | { |
| 937 | MC_Error extra; |
| 938 | tl_assert(VG_INVALID_THREADID != tid); |
| 939 | extra.Err.Free.ai.tag = Addr_Undescribed; |
| 940 | VG_(maybe_record_error)( tid, Err_Free, a, /*s*/NULL, &extra ); |
| 941 | } |
| 942 | |
| 943 | void MC_(record_freemismatch_error) ( ThreadId tid, MC_Chunk* mc ) |
| 944 | { |
| 945 | MC_Error extra; |
| 946 | AddrInfo* ai = &extra.Err.FreeMismatch.ai; |
| 947 | tl_assert(VG_INVALID_THREADID != tid); |
| 948 | ai->tag = Addr_Block; |
| 949 | ai->Addr.Block.block_kind = Block_Mallocd; // Nb: Not 'Block_Freed' |
| 950 | ai->Addr.Block.block_desc = "block"; |
| 951 | ai->Addr.Block.block_szB = mc->szB; |
| 952 | ai->Addr.Block.rwoffset = 0; |
| 953 | ai->Addr.Block.lastchange = mc->where; |
| 954 | VG_(maybe_record_error)( tid, Err_FreeMismatch, mc->data, /*s*/NULL, |
| 955 | &extra ); |
| 956 | } |
| 957 | |
| 958 | void MC_(record_illegal_mempool_error) ( ThreadId tid, Addr a ) |
| 959 | { |
| 960 | MC_Error extra; |
| 961 | tl_assert(VG_INVALID_THREADID != tid); |
| 962 | extra.Err.IllegalMempool.ai.tag = Addr_Undescribed; |
| 963 | VG_(maybe_record_error)( tid, Err_IllegalMempool, a, /*s*/NULL, &extra ); |
| 964 | } |
| 965 | |
| 966 | void MC_(record_overlap_error) ( ThreadId tid, Char* function, |
| 967 | Addr src, Addr dst, SizeT szB ) |
| 968 | { |
| 969 | MC_Error extra; |
| 970 | tl_assert(VG_INVALID_THREADID != tid); |
| 971 | extra.Err.Overlap.src = src; |
| 972 | extra.Err.Overlap.dst = dst; |
| 973 | extra.Err.Overlap.szB = szB; |
| 974 | VG_(maybe_record_error)( |
| 975 | tid, Err_Overlap, /*addr*/0, /*s*/function, &extra ); |
| 976 | } |
| 977 | |
| 978 | Bool MC_(record_leak_error) ( ThreadId tid, UInt n_this_record, |
njn | b7a4e2e | 2009-05-01 00:30:43 +0000 | [diff] [blame] | 979 | UInt n_total_records, LossRecord* lr, |
njn | 18afe5d | 2009-08-10 08:25:39 +0000 | [diff] [blame] | 980 | Bool print_record, Bool count_error ) |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 981 | { |
| 982 | MC_Error extra; |
| 983 | extra.Err.Leak.n_this_record = n_this_record; |
| 984 | extra.Err.Leak.n_total_records = n_total_records; |
njn | b7a4e2e | 2009-05-01 00:30:43 +0000 | [diff] [blame] | 985 | extra.Err.Leak.lr = lr; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 986 | return |
| 987 | VG_(unique_error) ( tid, Err_Leak, /*Addr*/0, /*s*/NULL, &extra, |
njn | 29a5c01 | 2009-05-06 06:15:55 +0000 | [diff] [blame] | 988 | lr->key.allocated_at, print_record, |
njn | 18afe5d | 2009-08-10 08:25:39 +0000 | [diff] [blame] | 989 | /*allow_GDB_attach*/False, count_error ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 990 | } |
| 991 | |
| 992 | void MC_(record_user_error) ( ThreadId tid, Addr a, |
| 993 | Bool isAddrErr, UInt otag ) |
| 994 | { |
| 995 | MC_Error extra; |
| 996 | if (otag != 0) { |
| 997 | tl_assert(!isAddrErr); |
| 998 | tl_assert( MC_(clo_mc_level) == 3 ); |
| 999 | } |
| 1000 | if (!isAddrErr) { |
| 1001 | tl_assert( MC_(clo_mc_level) >= 2 ); |
| 1002 | } |
| 1003 | tl_assert(VG_INVALID_THREADID != tid); |
| 1004 | extra.Err.User.isAddrErr = isAddrErr; |
| 1005 | extra.Err.User.ai.tag = Addr_Undescribed; |
| 1006 | extra.Err.User.otag = otag; |
| 1007 | extra.Err.User.origin_ec = NULL; /* Filled in later */ |
| 1008 | VG_(maybe_record_error)( tid, Err_User, a, /*s*/NULL, &extra ); |
| 1009 | } |
| 1010 | |
| 1011 | /*------------------------------------------------------------*/ |
| 1012 | /*--- Other error operations ---*/ |
| 1013 | /*------------------------------------------------------------*/ |
| 1014 | |
| 1015 | /* Compare error contexts, to detect duplicates. Note that if they |
| 1016 | are otherwise the same, the faulting addrs and associated rwoffsets |
| 1017 | are allowed to be different. */ |
| 1018 | Bool MC_(eq_Error) ( VgRes res, Error* e1, Error* e2 ) |
| 1019 | { |
| 1020 | MC_Error* extra1 = VG_(get_error_extra)(e1); |
| 1021 | MC_Error* extra2 = VG_(get_error_extra)(e2); |
| 1022 | |
| 1023 | /* Guaranteed by calling function */ |
| 1024 | tl_assert(VG_(get_error_kind)(e1) == VG_(get_error_kind)(e2)); |
| 1025 | |
| 1026 | switch (VG_(get_error_kind)(e1)) { |
| 1027 | case Err_CoreMem: { |
| 1028 | Char *e1s, *e2s; |
| 1029 | e1s = VG_(get_error_string)(e1); |
| 1030 | e2s = VG_(get_error_string)(e2); |
| 1031 | if (e1s == e2s) return True; |
| 1032 | if (VG_STREQ(e1s, e2s)) return True; |
| 1033 | return False; |
| 1034 | } |
| 1035 | |
| 1036 | case Err_RegParam: |
| 1037 | return VG_STREQ(VG_(get_error_string)(e1), VG_(get_error_string)(e2)); |
| 1038 | |
| 1039 | // Perhaps we should also check the addrinfo.akinds for equality. |
| 1040 | // That would result in more error reports, but only in cases where |
| 1041 | // a register contains uninitialised bytes and points to memory |
| 1042 | // containing uninitialised bytes. Currently, the 2nd of those to be |
| 1043 | // detected won't be reported. That is (nearly?) always the memory |
| 1044 | // error, which is good. |
| 1045 | case Err_MemParam: |
| 1046 | if (!VG_STREQ(VG_(get_error_string)(e1), |
| 1047 | VG_(get_error_string)(e2))) return False; |
| 1048 | // fall through |
| 1049 | case Err_User: |
| 1050 | return ( extra1->Err.User.isAddrErr == extra2->Err.User.isAddrErr |
| 1051 | ? True : False ); |
| 1052 | |
| 1053 | case Err_Free: |
| 1054 | case Err_FreeMismatch: |
| 1055 | case Err_Jump: |
| 1056 | case Err_IllegalMempool: |
| 1057 | case Err_Overlap: |
| 1058 | case Err_Cond: |
| 1059 | return True; |
| 1060 | |
| 1061 | case Err_Addr: |
| 1062 | return ( extra1->Err.Addr.szB == extra2->Err.Addr.szB |
| 1063 | ? True : False ); |
| 1064 | |
| 1065 | case Err_Value: |
| 1066 | return ( extra1->Err.Value.szB == extra2->Err.Value.szB |
| 1067 | ? True : False ); |
| 1068 | |
| 1069 | case Err_Leak: |
| 1070 | VG_(tool_panic)("Shouldn't get Err_Leak in mc_eq_Error,\n" |
| 1071 | "since it's handled with VG_(unique_error)()!"); |
| 1072 | |
| 1073 | default: |
| 1074 | VG_(printf)("Error:\n unknown error code %d\n", |
| 1075 | VG_(get_error_kind)(e1)); |
| 1076 | VG_(tool_panic)("unknown error code in mc_eq_Error"); |
| 1077 | } |
| 1078 | } |
| 1079 | |
sewardj | 62b9104 | 2011-01-23 20:45:53 +0000 | [diff] [blame] | 1080 | /* Functions used when searching MC_Chunk lists */ |
| 1081 | static |
| 1082 | Bool addr_is_in_MC_Chunk_default_REDZONE_SZB(MC_Chunk* mc, Addr a) |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1083 | { |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1084 | return VG_(addr_is_in_block)( a, mc->data, mc->szB, |
| 1085 | MC_MALLOC_REDZONE_SZB ); |
| 1086 | } |
sewardj | 62b9104 | 2011-01-23 20:45:53 +0000 | [diff] [blame] | 1087 | static |
| 1088 | Bool addr_is_in_MC_Chunk_with_REDZONE_SZB(MC_Chunk* mc, Addr a, SizeT rzB) |
| 1089 | { |
| 1090 | return VG_(addr_is_in_block)( a, mc->data, mc->szB, |
| 1091 | rzB ); |
| 1092 | } |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1093 | |
sewardj | 62b9104 | 2011-01-23 20:45:53 +0000 | [diff] [blame] | 1094 | // Forward declarations |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1095 | static Bool client_block_maybe_describe( Addr a, AddrInfo* ai ); |
sewardj | 62b9104 | 2011-01-23 20:45:53 +0000 | [diff] [blame] | 1096 | static Bool mempool_block_maybe_describe( Addr a, AddrInfo* ai ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1097 | |
| 1098 | |
| 1099 | /* Describe an address as best you can, for error messages, |
| 1100 | putting the result in ai. */ |
| 1101 | static void describe_addr ( Addr a, /*OUT*/AddrInfo* ai ) |
| 1102 | { |
| 1103 | MC_Chunk* mc; |
| 1104 | ThreadId tid; |
| 1105 | Addr stack_min, stack_max; |
| 1106 | VgSectKind sect; |
| 1107 | |
| 1108 | tl_assert(Addr_Undescribed == ai->tag); |
| 1109 | |
sewardj | 62b9104 | 2011-01-23 20:45:53 +0000 | [diff] [blame] | 1110 | /* -- Perhaps it's a user-named block? -- */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1111 | if (client_block_maybe_describe( a, ai )) { |
| 1112 | return; |
| 1113 | } |
sewardj | 62b9104 | 2011-01-23 20:45:53 +0000 | [diff] [blame] | 1114 | /* -- Perhaps it's in mempool block? -- */ |
| 1115 | if (mempool_block_maybe_describe( a, ai )) { |
| 1116 | return; |
| 1117 | } |
philippe | 11cc9ce | 2012-03-11 17:59:00 +0000 | [diff] [blame] | 1118 | /* Blocks allocated by memcheck malloc functions are either |
| 1119 | on the recently freed list or on the malloc-ed list. |
| 1120 | Custom blocks can be on both : a recently freed block might |
| 1121 | have been just re-allocated. |
| 1122 | So, first search the malloc-ed block, as the most recent |
| 1123 | block is the probable cause of error. |
| 1124 | We however detect and report that this is a recently re-allocated |
| 1125 | block. */ |
| 1126 | /* -- Search for a currently malloc'd block which might bracket it. -- */ |
| 1127 | VG_(HT_ResetIter)(MC_(malloc_list)); |
| 1128 | while ( (mc = VG_(HT_Next)(MC_(malloc_list))) ) { |
| 1129 | if (addr_is_in_MC_Chunk_default_REDZONE_SZB(mc, a)) { |
| 1130 | ai->tag = Addr_Block; |
| 1131 | ai->Addr.Block.block_kind = Block_Mallocd; |
| 1132 | if (MC_(get_freed_block_bracketting)( a )) |
| 1133 | ai->Addr.Block.block_desc = "recently re-allocated block"; |
| 1134 | else |
| 1135 | ai->Addr.Block.block_desc = "block"; |
| 1136 | ai->Addr.Block.block_szB = mc->szB; |
| 1137 | ai->Addr.Block.rwoffset = (Word)a - (Word)mc->data; |
| 1138 | ai->Addr.Block.lastchange = mc->where; |
| 1139 | return; |
| 1140 | } |
| 1141 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1142 | /* -- Search for a recently freed block which might bracket it. -- */ |
sewardj | 403d8aa | 2011-10-22 19:48:57 +0000 | [diff] [blame] | 1143 | mc = MC_(get_freed_block_bracketting)( a ); |
| 1144 | if (mc) { |
| 1145 | ai->tag = Addr_Block; |
| 1146 | ai->Addr.Block.block_kind = Block_Freed; |
| 1147 | ai->Addr.Block.block_desc = "block"; |
| 1148 | ai->Addr.Block.block_szB = mc->szB; |
| 1149 | ai->Addr.Block.rwoffset = (Word)a - (Word)mc->data; |
| 1150 | ai->Addr.Block.lastchange = mc->where; |
| 1151 | return; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1152 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1153 | /* -- Perhaps the variable type/location data describes it? -- */ |
| 1154 | ai->Addr.Variable.descr1 |
| 1155 | = VG_(newXA)( VG_(malloc), "mc.da.descr1", |
| 1156 | VG_(free), sizeof(HChar) ); |
| 1157 | ai->Addr.Variable.descr2 |
| 1158 | = VG_(newXA)( VG_(malloc), "mc.da.descr2", |
| 1159 | VG_(free), sizeof(HChar) ); |
| 1160 | |
| 1161 | (void) VG_(get_data_description)( ai->Addr.Variable.descr1, |
| 1162 | ai->Addr.Variable.descr2, a ); |
| 1163 | /* If there's nothing in descr1/2, free them. Why is it safe to to |
| 1164 | VG_(indexXA) at zero here? Because VG_(get_data_description) |
| 1165 | guarantees to zero terminate descr1/2 regardless of the outcome |
| 1166 | of the call. So there's always at least one element in each XA |
| 1167 | after the call. |
| 1168 | */ |
| 1169 | if (0 == VG_(strlen)( VG_(indexXA)( ai->Addr.Variable.descr1, 0 ))) { |
| 1170 | VG_(deleteXA)( ai->Addr.Variable.descr1 ); |
| 1171 | ai->Addr.Variable.descr1 = NULL; |
| 1172 | } |
| 1173 | if (0 == VG_(strlen)( VG_(indexXA)( ai->Addr.Variable.descr2, 0 ))) { |
| 1174 | VG_(deleteXA)( ai->Addr.Variable.descr2 ); |
| 1175 | ai->Addr.Variable.descr2 = NULL; |
| 1176 | } |
| 1177 | /* Assume (assert) that VG_(get_data_description) fills in descr1 |
| 1178 | before it fills in descr2 */ |
| 1179 | if (ai->Addr.Variable.descr1 == NULL) |
| 1180 | tl_assert(ai->Addr.Variable.descr2 == NULL); |
| 1181 | /* So did we get lucky? */ |
| 1182 | if (ai->Addr.Variable.descr1 != NULL) { |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1183 | ai->tag = Addr_Variable; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1184 | return; |
| 1185 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1186 | /* -- Have a look at the low level data symbols - perhaps it's in |
| 1187 | there. -- */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1188 | VG_(memset)( &ai->Addr.DataSym.name, |
| 1189 | 0, sizeof(ai->Addr.DataSym.name)); |
| 1190 | if (VG_(get_datasym_and_offset)( |
| 1191 | a, &ai->Addr.DataSym.name[0], |
| 1192 | sizeof(ai->Addr.DataSym.name)-1, |
| 1193 | &ai->Addr.DataSym.offset )) { |
| 1194 | ai->tag = Addr_DataSym; |
| 1195 | tl_assert( ai->Addr.DataSym.name |
| 1196 | [ sizeof(ai->Addr.DataSym.name)-1 ] == 0); |
| 1197 | return; |
| 1198 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1199 | /* -- Perhaps it's on a thread's stack? -- */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1200 | VG_(thread_stack_reset_iter)(&tid); |
| 1201 | while ( VG_(thread_stack_next)(&tid, &stack_min, &stack_max) ) { |
| 1202 | if (stack_min - VG_STACK_REDZONE_SZB <= a && a <= stack_max) { |
| 1203 | ai->tag = Addr_Stack; |
| 1204 | ai->Addr.Stack.tid = tid; |
| 1205 | return; |
| 1206 | } |
| 1207 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1208 | /* -- last ditch attempt at classification -- */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1209 | tl_assert( sizeof(ai->Addr.SectKind.objname) > 4 ); |
| 1210 | VG_(memset)( &ai->Addr.SectKind.objname, |
| 1211 | 0, sizeof(ai->Addr.SectKind.objname)); |
| 1212 | VG_(strcpy)( ai->Addr.SectKind.objname, "???" ); |
sewardj | e3f1e59 | 2009-07-31 09:41:29 +0000 | [diff] [blame] | 1213 | sect = VG_(DebugInfo_sect_kind)( &ai->Addr.SectKind.objname[0], |
| 1214 | sizeof(ai->Addr.SectKind.objname)-1, a); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1215 | if (sect != Vg_SectUnknown) { |
| 1216 | ai->tag = Addr_SectKind; |
| 1217 | ai->Addr.SectKind.kind = sect; |
| 1218 | tl_assert( ai->Addr.SectKind.objname |
| 1219 | [ sizeof(ai->Addr.SectKind.objname)-1 ] == 0); |
| 1220 | return; |
| 1221 | } |
sewardj | 6b523cd | 2009-07-15 14:49:40 +0000 | [diff] [blame] | 1222 | /* -- Clueless ... -- */ |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1223 | ai->tag = Addr_Unknown; |
| 1224 | return; |
| 1225 | } |
| 1226 | |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 1227 | void MC_(pp_describe_addr) ( Addr a ) |
| 1228 | { |
| 1229 | AddrInfo ai; |
| 1230 | |
| 1231 | ai.tag = Addr_Undescribed; |
| 1232 | describe_addr (a, &ai); |
| 1233 | mc_pp_AddrInfo (a, &ai, /* maybe_gcc */ False); |
| 1234 | } |
| 1235 | |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1236 | /* Fill in *origin_ec as specified by otag, or NULL it out if otag |
| 1237 | does not refer to a known origin. */ |
| 1238 | static void update_origin ( /*OUT*/ExeContext** origin_ec, |
| 1239 | UInt otag ) |
| 1240 | { |
| 1241 | UInt ecu = otag & ~3; |
| 1242 | *origin_ec = NULL; |
| 1243 | if (VG_(is_plausible_ECU)(ecu)) { |
| 1244 | *origin_ec = VG_(get_ExeContext_from_ECU)( ecu ); |
| 1245 | } |
| 1246 | } |
| 1247 | |
| 1248 | /* Updates the copy with address info if necessary (but not for all errors). */ |
| 1249 | UInt MC_(update_Error_extra)( Error* err ) |
| 1250 | { |
| 1251 | MC_Error* extra = VG_(get_error_extra)(err); |
| 1252 | |
| 1253 | switch (VG_(get_error_kind)(err)) { |
| 1254 | // These ones don't have addresses associated with them, and so don't |
| 1255 | // need any updating. |
| 1256 | case Err_CoreMem: |
| 1257 | //case Err_Value: |
| 1258 | //case Err_Cond: |
| 1259 | case Err_Overlap: |
| 1260 | // For Err_Leaks the returned size does not matter -- they are always |
| 1261 | // shown with VG_(unique_error)() so they 'extra' not copied. But |
| 1262 | // we make it consistent with the others. |
| 1263 | case Err_Leak: |
| 1264 | return sizeof(MC_Error); |
| 1265 | |
| 1266 | // For value errors, get the ExeContext corresponding to the |
| 1267 | // origin tag. Note that it is a kludge to assume that |
| 1268 | // a length-1 trace indicates a stack origin. FIXME. |
| 1269 | case Err_Value: |
| 1270 | update_origin( &extra->Err.Value.origin_ec, |
| 1271 | extra->Err.Value.otag ); |
| 1272 | return sizeof(MC_Error); |
| 1273 | case Err_Cond: |
| 1274 | update_origin( &extra->Err.Cond.origin_ec, |
| 1275 | extra->Err.Cond.otag ); |
| 1276 | return sizeof(MC_Error); |
| 1277 | case Err_RegParam: |
| 1278 | update_origin( &extra->Err.RegParam.origin_ec, |
| 1279 | extra->Err.RegParam.otag ); |
| 1280 | return sizeof(MC_Error); |
| 1281 | |
| 1282 | // These ones always involve a memory address. |
| 1283 | case Err_Addr: |
| 1284 | describe_addr ( VG_(get_error_address)(err), |
| 1285 | &extra->Err.Addr.ai ); |
| 1286 | return sizeof(MC_Error); |
| 1287 | case Err_MemParam: |
| 1288 | describe_addr ( VG_(get_error_address)(err), |
| 1289 | &extra->Err.MemParam.ai ); |
| 1290 | update_origin( &extra->Err.MemParam.origin_ec, |
| 1291 | extra->Err.MemParam.otag ); |
| 1292 | return sizeof(MC_Error); |
| 1293 | case Err_Jump: |
| 1294 | describe_addr ( VG_(get_error_address)(err), |
| 1295 | &extra->Err.Jump.ai ); |
| 1296 | return sizeof(MC_Error); |
| 1297 | case Err_User: |
| 1298 | describe_addr ( VG_(get_error_address)(err), |
| 1299 | &extra->Err.User.ai ); |
| 1300 | update_origin( &extra->Err.User.origin_ec, |
| 1301 | extra->Err.User.otag ); |
| 1302 | return sizeof(MC_Error); |
| 1303 | case Err_Free: |
| 1304 | describe_addr ( VG_(get_error_address)(err), |
| 1305 | &extra->Err.Free.ai ); |
| 1306 | return sizeof(MC_Error); |
| 1307 | case Err_IllegalMempool: |
| 1308 | describe_addr ( VG_(get_error_address)(err), |
| 1309 | &extra->Err.IllegalMempool.ai ); |
| 1310 | return sizeof(MC_Error); |
| 1311 | |
| 1312 | // Err_FreeMismatches have already had their address described; this is |
| 1313 | // possible because we have the MC_Chunk on hand when the error is |
| 1314 | // detected. However, the address may be part of a user block, and if so |
| 1315 | // we override the pre-determined description with a user block one. |
| 1316 | case Err_FreeMismatch: { |
| 1317 | tl_assert(extra && Block_Mallocd == |
| 1318 | extra->Err.FreeMismatch.ai.Addr.Block.block_kind); |
| 1319 | (void)client_block_maybe_describe( VG_(get_error_address)(err), |
| 1320 | &extra->Err.FreeMismatch.ai ); |
| 1321 | return sizeof(MC_Error); |
| 1322 | } |
| 1323 | |
| 1324 | default: VG_(tool_panic)("mc_update_extra: bad errkind"); |
| 1325 | } |
| 1326 | } |
| 1327 | |
sewardj | 62b9104 | 2011-01-23 20:45:53 +0000 | [diff] [blame] | 1328 | |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1329 | static Bool client_block_maybe_describe( Addr a, |
| 1330 | /*OUT*/AddrInfo* ai ) |
| 1331 | { |
sewardj | 56adc35 | 2008-05-02 11:25:17 +0000 | [diff] [blame] | 1332 | UWord i; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1333 | CGenBlock* cgbs = NULL; |
| 1334 | UWord cgb_used = 0; |
sewardj | 56adc35 | 2008-05-02 11:25:17 +0000 | [diff] [blame] | 1335 | |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1336 | MC_(get_ClientBlock_array)( &cgbs, &cgb_used ); |
| 1337 | if (cgbs == NULL) |
| 1338 | tl_assert(cgb_used == 0); |
| 1339 | |
| 1340 | /* Perhaps it's a general block ? */ |
| 1341 | for (i = 0; i < cgb_used; i++) { |
| 1342 | if (cgbs[i].start == 0 && cgbs[i].size == 0) |
| 1343 | continue; |
| 1344 | // Use zero as the redzone for client blocks. |
| 1345 | if (VG_(addr_is_in_block)(a, cgbs[i].start, cgbs[i].size, 0)) { |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1346 | ai->tag = Addr_Block; |
| 1347 | ai->Addr.Block.block_kind = Block_UserG; |
| 1348 | ai->Addr.Block.block_desc = cgbs[i].desc; |
| 1349 | ai->Addr.Block.block_szB = cgbs[i].size; |
sewardj | 56adc35 | 2008-05-02 11:25:17 +0000 | [diff] [blame] | 1350 | ai->Addr.Block.rwoffset = (Word)(a) - (Word)(cgbs[i].start); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1351 | ai->Addr.Block.lastchange = cgbs[i].where; |
| 1352 | return True; |
| 1353 | } |
| 1354 | } |
| 1355 | return False; |
| 1356 | } |
| 1357 | |
| 1358 | |
sewardj | 62b9104 | 2011-01-23 20:45:53 +0000 | [diff] [blame] | 1359 | static Bool mempool_block_maybe_describe( Addr a, |
| 1360 | /*OUT*/AddrInfo* ai ) |
| 1361 | { |
| 1362 | MC_Mempool* mp; |
| 1363 | tl_assert( MC_(mempool_list) ); |
| 1364 | |
| 1365 | VG_(HT_ResetIter)( MC_(mempool_list) ); |
| 1366 | while ( (mp = VG_(HT_Next)(MC_(mempool_list))) ) { |
| 1367 | if (mp->chunks != NULL) { |
| 1368 | MC_Chunk* mc; |
| 1369 | VG_(HT_ResetIter)(mp->chunks); |
| 1370 | while ( (mc = VG_(HT_Next)(mp->chunks)) ) { |
| 1371 | if (addr_is_in_MC_Chunk_with_REDZONE_SZB(mc, a, mp->rzB)) { |
| 1372 | ai->tag = Addr_Block; |
| 1373 | ai->Addr.Block.block_kind = Block_MempoolChunk; |
| 1374 | ai->Addr.Block.block_desc = "block"; |
| 1375 | ai->Addr.Block.block_szB = mc->szB; |
| 1376 | ai->Addr.Block.rwoffset = (Word)a - (Word)mc->data; |
| 1377 | ai->Addr.Block.lastchange = mc->where; |
| 1378 | return True; |
| 1379 | } |
| 1380 | } |
| 1381 | } |
| 1382 | } |
| 1383 | return False; |
| 1384 | } |
| 1385 | |
| 1386 | |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1387 | /*------------------------------------------------------------*/ |
| 1388 | /*--- Suppressions ---*/ |
| 1389 | /*------------------------------------------------------------*/ |
| 1390 | |
| 1391 | typedef |
| 1392 | enum { |
| 1393 | ParamSupp, // Bad syscall params |
| 1394 | UserSupp, // Errors arising from client-request checks |
| 1395 | CoreMemSupp, // Memory errors in core (pthread ops, signal handling) |
| 1396 | |
| 1397 | // Undefined value errors of given size |
| 1398 | Value1Supp, Value2Supp, Value4Supp, Value8Supp, Value16Supp, |
| 1399 | |
| 1400 | // Undefined value error in conditional. |
| 1401 | CondSupp, |
| 1402 | |
| 1403 | // Unaddressable read/write attempt at given size |
| 1404 | Addr1Supp, Addr2Supp, Addr4Supp, Addr8Supp, Addr16Supp, |
| 1405 | |
| 1406 | JumpSupp, // Jump to unaddressable target |
| 1407 | FreeSupp, // Invalid or mismatching free |
| 1408 | OverlapSupp, // Overlapping blocks in memcpy(), strcpy(), etc |
| 1409 | LeakSupp, // Something to be suppressed in a leak check. |
| 1410 | MempoolSupp, // Memory pool suppression. |
| 1411 | } |
| 1412 | MC_SuppKind; |
| 1413 | |
| 1414 | Bool MC_(is_recognised_suppression) ( Char* name, Supp* su ) |
| 1415 | { |
| 1416 | SuppKind skind; |
| 1417 | |
| 1418 | if (VG_STREQ(name, "Param")) skind = ParamSupp; |
| 1419 | else if (VG_STREQ(name, "User")) skind = UserSupp; |
| 1420 | else if (VG_STREQ(name, "CoreMem")) skind = CoreMemSupp; |
| 1421 | else if (VG_STREQ(name, "Addr1")) skind = Addr1Supp; |
| 1422 | else if (VG_STREQ(name, "Addr2")) skind = Addr2Supp; |
| 1423 | else if (VG_STREQ(name, "Addr4")) skind = Addr4Supp; |
| 1424 | else if (VG_STREQ(name, "Addr8")) skind = Addr8Supp; |
| 1425 | else if (VG_STREQ(name, "Addr16")) skind = Addr16Supp; |
| 1426 | else if (VG_STREQ(name, "Jump")) skind = JumpSupp; |
| 1427 | else if (VG_STREQ(name, "Free")) skind = FreeSupp; |
| 1428 | else if (VG_STREQ(name, "Leak")) skind = LeakSupp; |
| 1429 | else if (VG_STREQ(name, "Overlap")) skind = OverlapSupp; |
| 1430 | else if (VG_STREQ(name, "Mempool")) skind = MempoolSupp; |
| 1431 | else if (VG_STREQ(name, "Cond")) skind = CondSupp; |
| 1432 | else if (VG_STREQ(name, "Value0")) skind = CondSupp; /* backwards compat */ |
| 1433 | else if (VG_STREQ(name, "Value1")) skind = Value1Supp; |
| 1434 | else if (VG_STREQ(name, "Value2")) skind = Value2Supp; |
| 1435 | else if (VG_STREQ(name, "Value4")) skind = Value4Supp; |
| 1436 | else if (VG_STREQ(name, "Value8")) skind = Value8Supp; |
| 1437 | else if (VG_STREQ(name, "Value16")) skind = Value16Supp; |
| 1438 | else |
| 1439 | return False; |
| 1440 | |
| 1441 | VG_(set_supp_kind)(su, skind); |
| 1442 | return True; |
| 1443 | } |
| 1444 | |
njn | 35db56c | 2009-07-24 07:38:29 +0000 | [diff] [blame] | 1445 | Bool MC_(read_extra_suppression_info) ( Int fd, Char** bufpp, |
| 1446 | SizeT* nBufp, Supp *su ) |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1447 | { |
| 1448 | Bool eof; |
| 1449 | |
| 1450 | if (VG_(get_supp_kind)(su) == ParamSupp) { |
bart | 050eec5 | 2009-07-27 12:03:03 +0000 | [diff] [blame] | 1451 | eof = VG_(get_line) ( fd, bufpp, nBufp, NULL ); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1452 | if (eof) return False; |
njn | 35db56c | 2009-07-24 07:38:29 +0000 | [diff] [blame] | 1453 | VG_(set_supp_string)(su, VG_(strdup)("mc.resi.1", *bufpp)); |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1454 | } |
| 1455 | return True; |
| 1456 | } |
| 1457 | |
| 1458 | Bool MC_(error_matches_suppression) ( Error* err, Supp* su ) |
| 1459 | { |
| 1460 | Int su_szB; |
| 1461 | MC_Error* extra = VG_(get_error_extra)(err); |
| 1462 | ErrorKind ekind = VG_(get_error_kind )(err); |
| 1463 | |
| 1464 | switch (VG_(get_supp_kind)(su)) { |
| 1465 | case ParamSupp: |
| 1466 | return ((ekind == Err_RegParam || ekind == Err_MemParam) |
| 1467 | && VG_STREQ(VG_(get_error_string)(err), |
| 1468 | VG_(get_supp_string)(su))); |
| 1469 | |
| 1470 | case UserSupp: |
| 1471 | return (ekind == Err_User); |
| 1472 | |
| 1473 | case CoreMemSupp: |
| 1474 | return (ekind == Err_CoreMem |
| 1475 | && VG_STREQ(VG_(get_error_string)(err), |
| 1476 | VG_(get_supp_string)(su))); |
| 1477 | |
| 1478 | case Value1Supp: su_szB = 1; goto value_case; |
| 1479 | case Value2Supp: su_szB = 2; goto value_case; |
| 1480 | case Value4Supp: su_szB = 4; goto value_case; |
| 1481 | case Value8Supp: su_szB = 8; goto value_case; |
| 1482 | case Value16Supp:su_szB =16; goto value_case; |
| 1483 | value_case: |
| 1484 | return (ekind == Err_Value && extra->Err.Value.szB == su_szB); |
| 1485 | |
| 1486 | case CondSupp: |
| 1487 | return (ekind == Err_Cond); |
| 1488 | |
| 1489 | case Addr1Supp: su_szB = 1; goto addr_case; |
| 1490 | case Addr2Supp: su_szB = 2; goto addr_case; |
| 1491 | case Addr4Supp: su_szB = 4; goto addr_case; |
| 1492 | case Addr8Supp: su_szB = 8; goto addr_case; |
| 1493 | case Addr16Supp:su_szB =16; goto addr_case; |
| 1494 | addr_case: |
| 1495 | return (ekind == Err_Addr && extra->Err.Addr.szB == su_szB); |
| 1496 | |
| 1497 | case JumpSupp: |
| 1498 | return (ekind == Err_Jump); |
| 1499 | |
| 1500 | case FreeSupp: |
| 1501 | return (ekind == Err_Free || ekind == Err_FreeMismatch); |
| 1502 | |
| 1503 | case OverlapSupp: |
| 1504 | return (ekind == Err_Overlap); |
| 1505 | |
| 1506 | case LeakSupp: |
| 1507 | return (ekind == Err_Leak); |
| 1508 | |
| 1509 | case MempoolSupp: |
| 1510 | return (ekind == Err_IllegalMempool); |
| 1511 | |
| 1512 | default: |
| 1513 | VG_(printf)("Error:\n" |
| 1514 | " unknown suppression type %d\n", |
| 1515 | VG_(get_supp_kind)(su)); |
| 1516 | VG_(tool_panic)("unknown suppression type in " |
| 1517 | "MC_(error_matches_suppression)"); |
| 1518 | } |
| 1519 | } |
| 1520 | |
| 1521 | Char* MC_(get_error_name) ( Error* err ) |
| 1522 | { |
| 1523 | switch (VG_(get_error_kind)(err)) { |
| 1524 | case Err_RegParam: return "Param"; |
| 1525 | case Err_MemParam: return "Param"; |
| 1526 | case Err_User: return "User"; |
| 1527 | case Err_FreeMismatch: return "Free"; |
| 1528 | case Err_IllegalMempool: return "Mempool"; |
| 1529 | case Err_Free: return "Free"; |
| 1530 | case Err_Jump: return "Jump"; |
| 1531 | case Err_CoreMem: return "CoreMem"; |
| 1532 | case Err_Overlap: return "Overlap"; |
| 1533 | case Err_Leak: return "Leak"; |
| 1534 | case Err_Cond: return "Cond"; |
| 1535 | case Err_Addr: { |
| 1536 | MC_Error* extra = VG_(get_error_extra)(err); |
| 1537 | switch ( extra->Err.Addr.szB ) { |
| 1538 | case 1: return "Addr1"; |
| 1539 | case 2: return "Addr2"; |
| 1540 | case 4: return "Addr4"; |
| 1541 | case 8: return "Addr8"; |
| 1542 | case 16: return "Addr16"; |
| 1543 | default: VG_(tool_panic)("unexpected size for Addr"); |
| 1544 | } |
| 1545 | } |
| 1546 | case Err_Value: { |
| 1547 | MC_Error* extra = VG_(get_error_extra)(err); |
| 1548 | switch ( extra->Err.Value.szB ) { |
| 1549 | case 1: return "Value1"; |
| 1550 | case 2: return "Value2"; |
| 1551 | case 4: return "Value4"; |
| 1552 | case 8: return "Value8"; |
| 1553 | case 16: return "Value16"; |
| 1554 | default: VG_(tool_panic)("unexpected size for Value"); |
| 1555 | } |
| 1556 | } |
| 1557 | default: VG_(tool_panic)("get_error_name: unexpected type"); |
| 1558 | } |
| 1559 | } |
| 1560 | |
sewardj | 588adef | 2009-08-15 22:41:51 +0000 | [diff] [blame] | 1561 | Bool MC_(get_extra_suppression_info) ( Error* err, |
| 1562 | /*OUT*/Char* buf, Int nBuf ) |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1563 | { |
| 1564 | ErrorKind ekind = VG_(get_error_kind )(err); |
sewardj | 588adef | 2009-08-15 22:41:51 +0000 | [diff] [blame] | 1565 | tl_assert(buf); |
| 1566 | tl_assert(nBuf >= 16); // stay sane |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1567 | if (Err_RegParam == ekind || Err_MemParam == ekind) { |
sewardj | 588adef | 2009-08-15 22:41:51 +0000 | [diff] [blame] | 1568 | Char* errstr = VG_(get_error_string)(err); |
| 1569 | tl_assert(errstr); |
| 1570 | VG_(snprintf)(buf, nBuf-1, "%s", errstr); |
| 1571 | return True; |
| 1572 | } else { |
| 1573 | return False; |
sewardj | 7ce7166 | 2008-05-02 10:33:15 +0000 | [diff] [blame] | 1574 | } |
| 1575 | } |
| 1576 | |
| 1577 | |
| 1578 | /*--------------------------------------------------------------------*/ |
| 1579 | /*--- end mc_errors.c ---*/ |
| 1580 | /*--------------------------------------------------------------------*/ |