| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: memory.cpp |
| 3 | // Purpose: Memory checking implementation |
| 4 | // Author: Arthur Seaton, Julian Smart |
| 5 | // Modified by: |
| 6 | // Created: 04/01/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Julian Smart |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // For compilers that support precompilation, includes "wx.h". |
| 13 | #include "wx/wxprec.h" |
| 14 | |
| 15 | #ifdef __BORLANDC__ |
| 16 | #pragma hdrstop |
| 17 | #endif |
| 18 | |
| 19 | #ifndef WX_PRECOMP |
| 20 | #include "wx/defs.h" |
| 21 | #endif |
| 22 | |
| 23 | #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT |
| 24 | |
| 25 | #ifndef WX_PRECOMP |
| 26 | #include "wx/utils.h" |
| 27 | #include "wx/app.h" |
| 28 | #include "wx/hash.h" |
| 29 | #endif |
| 30 | |
| 31 | #if wxUSE_THREADS |
| 32 | #include "wx/thread.h" |
| 33 | #endif |
| 34 | |
| 35 | #include "wx/log.h" |
| 36 | #include <stdlib.h> |
| 37 | |
| 38 | #include "wx/ioswrap.h" |
| 39 | |
| 40 | #if !defined(__WATCOMC__) && !(defined(__VMS__) && ( __VMS_VER < 70000000 ) )\ |
| 41 | && !defined( __MWERKS__ ) && !defined(__SALFORDC__) |
| 42 | #include <memory.h> |
| 43 | #endif |
| 44 | |
| 45 | #include <stdarg.h> |
| 46 | #include <string.h> |
| 47 | |
| 48 | #ifdef __WXMSW__ |
| 49 | #include "wx/msw/wrapwin.h" |
| 50 | |
| 51 | #ifdef GetClassInfo |
| 52 | #undef GetClassInfo |
| 53 | #endif |
| 54 | |
| 55 | #ifdef GetClassName |
| 56 | #undef GetClassName |
| 57 | #endif |
| 58 | |
| 59 | #endif |
| 60 | |
| 61 | #include "wx/memory.h" |
| 62 | |
| 63 | #if wxUSE_THREADS && defined(__WXDEBUG__) |
| 64 | #define USE_THREADSAFE_MEMORY_ALLOCATION 1 |
| 65 | #else |
| 66 | #define USE_THREADSAFE_MEMORY_ALLOCATION 0 |
| 67 | #endif |
| 68 | |
| 69 | |
| 70 | #ifdef new |
| 71 | #undef new |
| 72 | #endif |
| 73 | |
| 74 | // wxDebugContext wxTheDebugContext; |
| 75 | /* |
| 76 | Redefine new and delete so that we can pick up situations where: |
| 77 | - we overwrite or underwrite areas of malloc'd memory. |
| 78 | - we use uninitialise variables |
| 79 | Only do this in debug mode. |
| 80 | |
| 81 | We change new to get enough memory to allocate a struct, followed |
| 82 | by the caller's requested memory, followed by a tag. The struct |
| 83 | is used to create a doubly linked list of these areas and also |
| 84 | contains another tag. The tags are used to determine when the area |
| 85 | has been over/under written. |
| 86 | */ |
| 87 | |
| 88 | |
| 89 | /* |
| 90 | Values which are used to set the markers which will be tested for |
| 91 | under/over write. There are 3 of these, one in the struct, one |
| 92 | immediately after the struct but before the caller requested memory and |
| 93 | one immediately after the requested memory. |
| 94 | */ |
| 95 | #define MemStartCheck 0x23A8 |
| 96 | #define MemMidCheck 0xA328 |
| 97 | #define MemEndCheck 0x8A32 |
| 98 | #define MemFillChar 0xAF |
| 99 | #define MemStructId 0x666D |
| 100 | |
| 101 | /* |
| 102 | External interface for the wxMemStruct class. Others are |
| 103 | defined inline within the class def. Here we only need to be able |
| 104 | to add and delete nodes from the list and handle errors in some way. |
| 105 | */ |
| 106 | |
| 107 | /* |
| 108 | Used for internal "this shouldn't happen" type of errors. |
| 109 | */ |
| 110 | void wxMemStruct::ErrorMsg (const char * mesg) |
| 111 | { |
| 112 | wxLogMessage(wxT("wxWidgets memory checking error: %s"), mesg); |
| 113 | PrintNode (); |
| 114 | } |
| 115 | |
| 116 | /* |
| 117 | Used when we find an overwrite or an underwrite error. |
| 118 | */ |
| 119 | void wxMemStruct::ErrorMsg () |
| 120 | { |
| 121 | wxLogMessage(wxT("wxWidgets over/underwrite memory error:")); |
| 122 | PrintNode (); |
| 123 | } |
| 124 | |
| 125 | |
| 126 | /* |
| 127 | We want to find out if pointers have been overwritten as soon as is |
| 128 | possible, so test everything before we dereference it. Of course it's still |
| 129 | quite possible that, if things have been overwritten, this function will |
| 130 | fall over, but the only way of dealing with that would cost too much in terms |
| 131 | of time. |
| 132 | */ |
| 133 | int wxMemStruct::AssertList () |
| 134 | { |
| 135 | if (wxDebugContext::GetHead () != 0 && ! (wxDebugContext::GetHead ())->AssertIt () || |
| 136 | wxDebugContext::GetTail () != 0 && ! wxDebugContext::GetTail ()->AssertIt ()) { |
| 137 | ErrorMsg ("Head or tail pointers trashed"); |
| 138 | return 0; |
| 139 | } |
| 140 | return 1; |
| 141 | } |
| 142 | |
| 143 | |
| 144 | /* |
| 145 | Check that the thing we're pointing to has the correct id for a wxMemStruct |
| 146 | object and also that it's previous and next pointers are pointing at objects |
| 147 | which have valid ids. |
| 148 | This is definitely not perfect since we could fall over just trying to access |
| 149 | any of the slots which we use here, but I think it's about the best that I |
| 150 | can do without doing something like taking all new wxMemStruct pointers and |
| 151 | comparing them against all known pointer within the list and then only |
| 152 | doing this sort of check _after_ you've found the pointer in the list. That |
| 153 | would be safer, but also much more time consuming. |
| 154 | */ |
| 155 | int wxMemStruct::AssertIt () |
| 156 | { |
| 157 | return (m_id == MemStructId && |
| 158 | (m_prev == 0 || m_prev->m_id == MemStructId) && |
| 159 | (m_next == 0 || m_next->m_id == MemStructId)); |
| 160 | } |
| 161 | |
| 162 | |
| 163 | /* |
| 164 | Additions are always at the tail of the list. |
| 165 | Returns 0 on error, non-zero on success. |
| 166 | */ |
| 167 | int wxMemStruct::Append () |
| 168 | { |
| 169 | if (! AssertList ()) |
| 170 | return 0; |
| 171 | |
| 172 | if (wxDebugContext::GetHead () == 0) { |
| 173 | if (wxDebugContext::GetTail () != 0) { |
| 174 | ErrorMsg ("Null list should have a null tail pointer"); |
| 175 | return 0; |
| 176 | } |
| 177 | (void) wxDebugContext::SetHead (this); |
| 178 | (void) wxDebugContext::SetTail (this); |
| 179 | } else { |
| 180 | wxDebugContext::GetTail ()->m_next = this; |
| 181 | this->m_prev = wxDebugContext::GetTail (); |
| 182 | (void) wxDebugContext::SetTail (this); |
| 183 | } |
| 184 | return 1; |
| 185 | } |
| 186 | |
| 187 | |
| 188 | /* |
| 189 | Don't actually free up anything here as the space which is used |
| 190 | by the node will be free'd up when the whole block is free'd. |
| 191 | Returns 0 on error, non-zero on success. |
| 192 | */ |
| 193 | int wxMemStruct::Unlink () |
| 194 | { |
| 195 | if (! AssertList ()) |
| 196 | return 0; |
| 197 | |
| 198 | if (wxDebugContext::GetHead () == 0 || wxDebugContext::GetTail () == 0) { |
| 199 | ErrorMsg ("Trying to remove node from empty list"); |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | // Handle the part of the list before this node. |
| 204 | if (m_prev == 0) { |
| 205 | if (this != wxDebugContext::GetHead ()) { |
| 206 | ErrorMsg ("No previous node for non-head node"); |
| 207 | return 0; |
| 208 | } |
| 209 | (void) wxDebugContext::SetHead (m_next); |
| 210 | } else { |
| 211 | if (! m_prev->AssertIt ()) { |
| 212 | ErrorMsg ("Trashed previous pointer"); |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | if (m_prev->m_next != this) { |
| 217 | ErrorMsg ("List is inconsistent"); |
| 218 | return 0; |
| 219 | } |
| 220 | m_prev->m_next = m_next; |
| 221 | } |
| 222 | |
| 223 | // Handle the part of the list after this node. |
| 224 | if (m_next == 0) { |
| 225 | if (this != wxDebugContext::GetTail ()) { |
| 226 | ErrorMsg ("No next node for non-tail node"); |
| 227 | return 0; |
| 228 | } |
| 229 | (void) wxDebugContext::SetTail (m_prev); |
| 230 | } else { |
| 231 | if (! m_next->AssertIt ()) { |
| 232 | ErrorMsg ("Trashed next pointer"); |
| 233 | return 0; |
| 234 | } |
| 235 | |
| 236 | if (m_next->m_prev != this) { |
| 237 | ErrorMsg ("List is inconsistent"); |
| 238 | return 0; |
| 239 | } |
| 240 | m_next->m_prev = m_prev; |
| 241 | } |
| 242 | |
| 243 | return 1; |
| 244 | } |
| 245 | |
| 246 | |
| 247 | |
| 248 | /* |
| 249 | Checks a node and block of memory to see that the markers are still |
| 250 | intact. |
| 251 | */ |
| 252 | int wxMemStruct::CheckBlock () |
| 253 | { |
| 254 | int nFailures = 0; |
| 255 | |
| 256 | if (m_firstMarker != MemStartCheck) { |
| 257 | nFailures++; |
| 258 | ErrorMsg (); |
| 259 | } |
| 260 | |
| 261 | char * pointer = wxDebugContext::MidMarkerPos ((char *) this); |
| 262 | if (* (wxMarkerType *) pointer != MemMidCheck) { |
| 263 | nFailures++; |
| 264 | ErrorMsg (); |
| 265 | } |
| 266 | |
| 267 | pointer = wxDebugContext::EndMarkerPos ((char *) this, RequestSize ()); |
| 268 | if (* (wxMarkerType *) pointer != MemEndCheck) { |
| 269 | nFailures++; |
| 270 | ErrorMsg (); |
| 271 | } |
| 272 | |
| 273 | return nFailures; |
| 274 | } |
| 275 | |
| 276 | |
| 277 | /* |
| 278 | Check the list of nodes to see if they are all ok. |
| 279 | */ |
| 280 | int wxMemStruct::CheckAllPrevious () |
| 281 | { |
| 282 | int nFailures = 0; |
| 283 | |
| 284 | for (wxMemStruct * st = this->m_prev; st != 0; st = st->m_prev) { |
| 285 | if (st->AssertIt ()) |
| 286 | nFailures += st->CheckBlock (); |
| 287 | else |
| 288 | return -1; |
| 289 | } |
| 290 | |
| 291 | return nFailures; |
| 292 | } |
| 293 | |
| 294 | |
| 295 | /* |
| 296 | When we delete a node we set the id slot to a specific value and then test |
| 297 | against this to see if a nodes have been deleted previously. I don't |
| 298 | just set the entire memory to the fillChar because then I'd be overwriting |
| 299 | useful stuff like the vtbl which may be needed to output the error message |
| 300 | including the file name and line numbers. Without this info the whole point |
| 301 | of this class is lost! |
| 302 | */ |
| 303 | void wxMemStruct::SetDeleted () |
| 304 | { |
| 305 | m_id = MemFillChar; |
| 306 | } |
| 307 | |
| 308 | int wxMemStruct::IsDeleted () |
| 309 | { |
| 310 | return (m_id == MemFillChar); |
| 311 | } |
| 312 | |
| 313 | |
| 314 | /* |
| 315 | Print out a single node. There are many far better ways of doing this |
| 316 | but this will suffice for now. |
| 317 | */ |
| 318 | void wxMemStruct::PrintNode () |
| 319 | { |
| 320 | if (m_isObject) |
| 321 | { |
| 322 | wxObject *obj = (wxObject *)m_actualData; |
| 323 | wxClassInfo *info = obj->GetClassInfo(); |
| 324 | |
| 325 | // Let's put this in standard form so IDEs can load the file at the appropriate |
| 326 | // line |
| 327 | wxString msg; |
| 328 | |
| 329 | if (m_fileName) |
| 330 | msg.Printf(wxT("%s(%d): "), m_fileName, (int)m_lineNum); |
| 331 | |
| 332 | if (info && info->GetClassName()) |
| 333 | msg += info->GetClassName(); |
| 334 | else |
| 335 | msg += wxT("object"); |
| 336 | |
| 337 | wxString msg2; |
| 338 | msg2.Printf(wxT(" at 0x%lX, size %d"), (long)GetActualData(), (int)RequestSize()); |
| 339 | msg += msg2; |
| 340 | |
| 341 | wxLogMessage(msg); |
| 342 | } |
| 343 | else |
| 344 | { |
| 345 | wxString msg; |
| 346 | |
| 347 | if (m_fileName) |
| 348 | msg.Printf(wxT("%s(%d): "), m_fileName, (int)m_lineNum); |
| 349 | msg += wxT("non-object data"); |
| 350 | wxString msg2; |
| 351 | msg2.Printf(wxT(" at 0x%lX, size %d\n"), (long)GetActualData(), (int)RequestSize()); |
| 352 | msg += msg2; |
| 353 | |
| 354 | wxLogMessage(msg); |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | void wxMemStruct::Dump () |
| 359 | { |
| 360 | if (!ValidateNode()) return; |
| 361 | |
| 362 | if (m_isObject) |
| 363 | { |
| 364 | wxObject *obj = (wxObject *)m_actualData; |
| 365 | |
| 366 | wxString msg; |
| 367 | if (m_fileName) |
| 368 | msg.Printf(wxT("%s(%d): "), m_fileName, (int)m_lineNum); |
| 369 | |
| 370 | |
| 371 | /* TODO: We no longer have a stream (using wxLogDebug) so we can't dump it. |
| 372 | * Instead, do what wxObject::Dump does. |
| 373 | * What should we do long-term, eliminate Dumping? Or specify |
| 374 | * that MyClass::Dump should use wxLogDebug? Ugh. |
| 375 | obj->Dump(wxDebugContext::GetStream()); |
| 376 | */ |
| 377 | |
| 378 | if (obj->GetClassInfo() && obj->GetClassInfo()->GetClassName()) |
| 379 | msg += obj->GetClassInfo()->GetClassName(); |
| 380 | else |
| 381 | msg += wxT("unknown object class"); |
| 382 | |
| 383 | wxString msg2; |
| 384 | msg2.Printf(wxT(" at 0x%lX, size %d"), (long)GetActualData(), (int)RequestSize()); |
| 385 | msg += msg2; |
| 386 | |
| 387 | wxDebugContext::OutputDumpLine(msg); |
| 388 | } |
| 389 | else |
| 390 | { |
| 391 | wxString msg; |
| 392 | if (m_fileName) |
| 393 | msg.Printf(wxT("%s(%d): "), m_fileName, (int)m_lineNum); |
| 394 | |
| 395 | wxString msg2; |
| 396 | msg2.Printf(wxT("non-object data at 0x%lX, size %d"), (long)GetActualData(), (int)RequestSize() ); |
| 397 | msg += msg2; |
| 398 | wxDebugContext::OutputDumpLine(msg); |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | |
| 403 | /* |
| 404 | Validate a node. Check to see that the node is "clean" in the sense |
| 405 | that nothing has over/underwritten it etc. |
| 406 | */ |
| 407 | int wxMemStruct::ValidateNode () |
| 408 | { |
| 409 | char * startPointer = (char *) this; |
| 410 | if (!AssertIt ()) { |
| 411 | if (IsDeleted ()) |
| 412 | ErrorMsg ("Object already deleted"); |
| 413 | else { |
| 414 | // Can't use the error routines as we have no recognisable object. |
| 415 | #ifndef __WXGTK__ |
| 416 | wxLogMessage(wxT("Can't verify memory struct - all bets are off!")); |
| 417 | #endif |
| 418 | } |
| 419 | return 0; |
| 420 | } |
| 421 | |
| 422 | /* |
| 423 | int i; |
| 424 | for (i = 0; i < wxDebugContext::TotSize (requestSize ()); i++) |
| 425 | cout << startPointer [i]; |
| 426 | cout << endl; |
| 427 | */ |
| 428 | if (Marker () != MemStartCheck) |
| 429 | ErrorMsg (); |
| 430 | if (* (wxMarkerType *) wxDebugContext::MidMarkerPos (startPointer) != MemMidCheck) |
| 431 | ErrorMsg (); |
| 432 | if (* (wxMarkerType *) wxDebugContext::EndMarkerPos (startPointer, |
| 433 | RequestSize ()) != |
| 434 | MemEndCheck) |
| 435 | ErrorMsg (); |
| 436 | |
| 437 | // Back to before the extra buffer and check that |
| 438 | // we can still read what we originally wrote. |
| 439 | if (Marker () != MemStartCheck || |
| 440 | * (wxMarkerType *) wxDebugContext::MidMarkerPos (startPointer) |
| 441 | != MemMidCheck || |
| 442 | * (wxMarkerType *) wxDebugContext::EndMarkerPos (startPointer, |
| 443 | RequestSize ()) != MemEndCheck) |
| 444 | { |
| 445 | ErrorMsg (); |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | return 1; |
| 450 | } |
| 451 | |
| 452 | /* |
| 453 | The wxDebugContext class. |
| 454 | */ |
| 455 | |
| 456 | wxMemStruct *wxDebugContext::m_head = NULL; |
| 457 | wxMemStruct *wxDebugContext::m_tail = NULL; |
| 458 | |
| 459 | bool wxDebugContext::m_checkPrevious = false; |
| 460 | int wxDebugContext::debugLevel = 1; |
| 461 | bool wxDebugContext::debugOn = true; |
| 462 | wxMemStruct *wxDebugContext::checkPoint = NULL; |
| 463 | |
| 464 | // For faster alignment calculation |
| 465 | static wxMarkerType markerCalc[2]; |
| 466 | int wxDebugContext::m_balign = (int)((char *)&markerCalc[1] - (char*)&markerCalc[0]); |
| 467 | int wxDebugContext::m_balignmask = (int)((char *)&markerCalc[1] - (char*)&markerCalc[0]) - 1; |
| 468 | |
| 469 | wxDebugContext::wxDebugContext(void) |
| 470 | { |
| 471 | } |
| 472 | |
| 473 | wxDebugContext::~wxDebugContext(void) |
| 474 | { |
| 475 | } |
| 476 | |
| 477 | /* |
| 478 | Work out the positions of the markers by creating an array of 2 markers |
| 479 | and comparing the addresses of the 2 elements. Use this number as the |
| 480 | alignment for markers. |
| 481 | */ |
| 482 | size_t wxDebugContext::CalcAlignment () |
| 483 | { |
| 484 | wxMarkerType ar[2]; |
| 485 | return (char *) &ar[1] - (char *) &ar[0]; |
| 486 | } |
| 487 | |
| 488 | |
| 489 | char * wxDebugContext::StructPos (const char * buf) |
| 490 | { |
| 491 | return (char *) buf; |
| 492 | } |
| 493 | |
| 494 | char * wxDebugContext::MidMarkerPos (const char * buf) |
| 495 | { |
| 496 | return StructPos (buf) + PaddedSize (sizeof (wxMemStruct)); |
| 497 | } |
| 498 | |
| 499 | char * wxDebugContext::CallerMemPos (const char * buf) |
| 500 | { |
| 501 | return MidMarkerPos (buf) + PaddedSize (sizeof(wxMarkerType)); |
| 502 | } |
| 503 | |
| 504 | |
| 505 | char * wxDebugContext::EndMarkerPos (const char * buf, const size_t size) |
| 506 | { |
| 507 | return CallerMemPos (buf) + PaddedSize (size); |
| 508 | } |
| 509 | |
| 510 | |
| 511 | /* |
| 512 | Slightly different as this takes a pointer to the start of the caller |
| 513 | requested region and returns a pointer to the start of the buffer. |
| 514 | */ |
| 515 | char * wxDebugContext::StartPos (const char * caller) |
| 516 | { |
| 517 | return ((char *) (caller - wxDebugContext::PaddedSize (sizeof(wxMarkerType)) - |
| 518 | wxDebugContext::PaddedSize (sizeof (wxMemStruct)))); |
| 519 | } |
| 520 | |
| 521 | /* |
| 522 | We may need padding between various parts of the allocated memory. |
| 523 | Given a size of memory, this returns the amount of memory which should |
| 524 | be allocated in order to allow for alignment of the following object. |
| 525 | |
| 526 | I don't know how portable this stuff is, but it seems to work for me at |
| 527 | the moment. It would be real nice if I knew more about this! |
| 528 | |
| 529 | // Note: this function is now obsolete (along with CalcAlignment) |
| 530 | // because the calculations are done statically, for greater speed. |
| 531 | */ |
| 532 | size_t wxDebugContext::GetPadding (const size_t size) |
| 533 | { |
| 534 | size_t pad = size % CalcAlignment (); |
| 535 | return (pad) ? sizeof(wxMarkerType) - pad : 0; |
| 536 | } |
| 537 | |
| 538 | size_t wxDebugContext::PaddedSize (const size_t size) |
| 539 | { |
| 540 | // Added by Terry Farnham <TJRT@pacbell.net> to replace |
| 541 | // slow GetPadding call. |
| 542 | int padb; |
| 543 | |
| 544 | padb = size & m_balignmask; |
| 545 | if(padb) |
| 546 | return(size + m_balign - padb); |
| 547 | else |
| 548 | return(size); |
| 549 | } |
| 550 | |
| 551 | /* |
| 552 | Returns the total amount of memory which we need to get from the system |
| 553 | in order to satisfy a caller request. This includes space for the struct |
| 554 | plus markers and the caller's memory as well. |
| 555 | */ |
| 556 | size_t wxDebugContext::TotSize (const size_t reqSize) |
| 557 | { |
| 558 | return (PaddedSize (sizeof (wxMemStruct)) + PaddedSize (reqSize) + |
| 559 | 2 * sizeof(wxMarkerType)); |
| 560 | } |
| 561 | |
| 562 | |
| 563 | /* |
| 564 | Traverse the list of nodes executing the given function on each node. |
| 565 | */ |
| 566 | void wxDebugContext::TraverseList (PmSFV func, wxMemStruct *from) |
| 567 | { |
| 568 | if (!from) |
| 569 | from = wxDebugContext::GetHead (); |
| 570 | |
| 571 | wxMemStruct * st = NULL; |
| 572 | for (st = from; st != 0; st = st->m_next) |
| 573 | { |
| 574 | void* data = st->GetActualData(); |
| 575 | // if ((data != (void*)m_debugStream) && (data != (void*) m_streamBuf)) |
| 576 | if (data != (void*) wxLog::GetActiveTarget()) |
| 577 | { |
| 578 | (st->*func) (); |
| 579 | } |
| 580 | } |
| 581 | } |
| 582 | |
| 583 | |
| 584 | /* |
| 585 | Print out the list. |
| 586 | */ |
| 587 | bool wxDebugContext::PrintList (void) |
| 588 | { |
| 589 | #ifdef __WXDEBUG__ |
| 590 | TraverseList ((PmSFV)&wxMemStruct::PrintNode, (checkPoint ? checkPoint->m_next : (wxMemStruct*)NULL)); |
| 591 | |
| 592 | return true; |
| 593 | #else |
| 594 | return false; |
| 595 | #endif |
| 596 | } |
| 597 | |
| 598 | bool wxDebugContext::Dump(void) |
| 599 | { |
| 600 | #ifdef __WXDEBUG__ |
| 601 | { |
| 602 | wxChar* appName = (wxChar*) wxT("application"); |
| 603 | wxString appNameStr; |
| 604 | if (wxTheApp) |
| 605 | { |
| 606 | appNameStr = wxTheApp->GetAppName(); |
| 607 | appName = WXSTRINGCAST appNameStr; |
| 608 | OutputDumpLine(wxT("----- Memory dump of %s at %s -----"), appName, WXSTRINGCAST wxNow() ); |
| 609 | } |
| 610 | else |
| 611 | { |
| 612 | OutputDumpLine( wxT("----- Memory dump -----") ); |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | TraverseList ((PmSFV)&wxMemStruct::Dump, (checkPoint ? checkPoint->m_next : (wxMemStruct*)NULL)); |
| 617 | |
| 618 | OutputDumpLine(wxEmptyString); |
| 619 | OutputDumpLine(wxEmptyString); |
| 620 | |
| 621 | return true; |
| 622 | #else |
| 623 | return false; |
| 624 | #endif |
| 625 | } |
| 626 | |
| 627 | #ifdef __WXDEBUG__ |
| 628 | struct wxDebugStatsStruct |
| 629 | { |
| 630 | long instanceCount; |
| 631 | long totalSize; |
| 632 | wxChar *instanceClass; |
| 633 | wxDebugStatsStruct *next; |
| 634 | }; |
| 635 | |
| 636 | static wxDebugStatsStruct *FindStatsStruct(wxDebugStatsStruct *st, wxChar *name) |
| 637 | { |
| 638 | while (st) |
| 639 | { |
| 640 | if (wxStrcmp(st->instanceClass, name) == 0) |
| 641 | return st; |
| 642 | st = st->next; |
| 643 | } |
| 644 | return NULL; |
| 645 | } |
| 646 | |
| 647 | static wxDebugStatsStruct *InsertStatsStruct(wxDebugStatsStruct *head, wxDebugStatsStruct *st) |
| 648 | { |
| 649 | st->next = head; |
| 650 | return st; |
| 651 | } |
| 652 | #endif |
| 653 | |
| 654 | bool wxDebugContext::PrintStatistics(bool detailed) |
| 655 | { |
| 656 | #ifdef __WXDEBUG__ |
| 657 | { |
| 658 | wxChar* appName = (wxChar*) wxT("application"); |
| 659 | wxString appNameStr; |
| 660 | if (wxTheApp) |
| 661 | { |
| 662 | appNameStr = wxTheApp->GetAppName(); |
| 663 | appName = WXSTRINGCAST appNameStr; |
| 664 | OutputDumpLine(wxT("----- Memory statistics of %s at %s -----"), appName, WXSTRINGCAST wxNow() ); |
| 665 | } |
| 666 | else |
| 667 | { |
| 668 | OutputDumpLine( wxT("----- Memory statistics -----") ); |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | bool currentMode = GetDebugMode(); |
| 673 | SetDebugMode(false); |
| 674 | |
| 675 | long noNonObjectNodes = 0; |
| 676 | long noObjectNodes = 0; |
| 677 | long totalSize = 0; |
| 678 | |
| 679 | wxDebugStatsStruct *list = NULL; |
| 680 | |
| 681 | wxMemStruct *from = (checkPoint ? checkPoint->m_next : (wxMemStruct*)NULL ); |
| 682 | if (!from) |
| 683 | from = wxDebugContext::GetHead (); |
| 684 | |
| 685 | wxMemStruct *st; |
| 686 | for (st = from; st != 0; st = st->m_next) |
| 687 | { |
| 688 | void* data = st->GetActualData(); |
| 689 | if (detailed && (data != (void*) wxLog::GetActiveTarget())) |
| 690 | { |
| 691 | wxChar *className = (wxChar*) wxT("nonobject"); |
| 692 | if (st->m_isObject && st->GetActualData()) |
| 693 | { |
| 694 | wxObject *obj = (wxObject *)st->GetActualData(); |
| 695 | if (obj->GetClassInfo()->GetClassName()) |
| 696 | className = (wxChar*)obj->GetClassInfo()->GetClassName(); |
| 697 | } |
| 698 | wxDebugStatsStruct *stats = FindStatsStruct(list, className); |
| 699 | if (!stats) |
| 700 | { |
| 701 | stats = (wxDebugStatsStruct *)malloc(sizeof(wxDebugStatsStruct)); |
| 702 | stats->instanceClass = className; |
| 703 | stats->instanceCount = 0; |
| 704 | stats->totalSize = 0; |
| 705 | list = InsertStatsStruct(list, stats); |
| 706 | } |
| 707 | stats->instanceCount ++; |
| 708 | stats->totalSize += st->RequestSize(); |
| 709 | } |
| 710 | |
| 711 | if (data != (void*) wxLog::GetActiveTarget()) |
| 712 | { |
| 713 | totalSize += st->RequestSize(); |
| 714 | if (st->m_isObject) |
| 715 | noObjectNodes ++; |
| 716 | else |
| 717 | noNonObjectNodes ++; |
| 718 | } |
| 719 | } |
| 720 | |
| 721 | if (detailed) |
| 722 | { |
| 723 | while (list) |
| 724 | { |
| 725 | OutputDumpLine(wxT("%ld objects of class %s, total size %ld"), |
| 726 | list->instanceCount, list->instanceClass, list->totalSize); |
| 727 | wxDebugStatsStruct *old = list; |
| 728 | list = old->next; |
| 729 | free((char *)old); |
| 730 | } |
| 731 | OutputDumpLine(wxEmptyString); |
| 732 | } |
| 733 | |
| 734 | SetDebugMode(currentMode); |
| 735 | |
| 736 | OutputDumpLine(wxT("Number of object items: %ld"), noObjectNodes); |
| 737 | OutputDumpLine(wxT("Number of non-object items: %ld"), noNonObjectNodes); |
| 738 | OutputDumpLine(wxT("Total allocated size: %ld"), totalSize); |
| 739 | OutputDumpLine(wxEmptyString); |
| 740 | OutputDumpLine(wxEmptyString); |
| 741 | |
| 742 | return true; |
| 743 | #else |
| 744 | (void)detailed; |
| 745 | return false; |
| 746 | #endif |
| 747 | } |
| 748 | |
| 749 | bool wxDebugContext::PrintClasses(void) |
| 750 | { |
| 751 | { |
| 752 | wxChar* appName = (wxChar*) wxT("application"); |
| 753 | wxString appNameStr; |
| 754 | if (wxTheApp) |
| 755 | { |
| 756 | appNameStr = wxTheApp->GetAppName(); |
| 757 | appName = WXSTRINGCAST appNameStr; |
| 758 | wxLogMessage(wxT("----- Classes in %s -----"), appName); |
| 759 | } |
| 760 | } |
| 761 | |
| 762 | int n = 0; |
| 763 | wxHashTable::compatibility_iterator node; |
| 764 | wxClassInfo *info; |
| 765 | |
| 766 | wxClassInfo::sm_classTable->BeginFind(); |
| 767 | node = wxClassInfo::sm_classTable->Next(); |
| 768 | while (node) |
| 769 | { |
| 770 | info = (wxClassInfo *)node->GetData(); |
| 771 | if (info->GetClassName()) |
| 772 | { |
| 773 | wxString msg(info->GetClassName()); |
| 774 | msg += wxT(" "); |
| 775 | |
| 776 | if (info->GetBaseClassName1() && !info->GetBaseClassName2()) |
| 777 | { |
| 778 | msg += wxT("is a "); |
| 779 | msg += info->GetBaseClassName1(); |
| 780 | } |
| 781 | else if (info->GetBaseClassName1() && info->GetBaseClassName2()) |
| 782 | { |
| 783 | msg += wxT("is a "); |
| 784 | msg += info->GetBaseClassName1() ; |
| 785 | msg += wxT(", "); |
| 786 | msg += info->GetBaseClassName2() ; |
| 787 | } |
| 788 | if (info->GetConstructor()) |
| 789 | msg += wxT(": dynamic"); |
| 790 | |
| 791 | wxLogMessage(msg); |
| 792 | } |
| 793 | node = wxClassInfo::sm_classTable->Next(); |
| 794 | n ++; |
| 795 | } |
| 796 | wxLogMessage(wxEmptyString); |
| 797 | wxLogMessage(wxT("There are %d classes derived from wxObject."), n); |
| 798 | wxLogMessage(wxEmptyString); |
| 799 | wxLogMessage(wxEmptyString); |
| 800 | return true; |
| 801 | } |
| 802 | |
| 803 | void wxDebugContext::SetCheckpoint(bool all) |
| 804 | { |
| 805 | if (all) |
| 806 | checkPoint = NULL; |
| 807 | else |
| 808 | checkPoint = m_tail; |
| 809 | } |
| 810 | |
| 811 | // Checks all nodes since checkpoint, or since start. |
| 812 | int wxDebugContext::Check(bool checkAll) |
| 813 | { |
| 814 | int nFailures = 0; |
| 815 | |
| 816 | wxMemStruct *from = (checkPoint ? checkPoint->m_next : (wxMemStruct*)NULL ); |
| 817 | if (!from || checkAll) |
| 818 | from = wxDebugContext::GetHead (); |
| 819 | |
| 820 | for (wxMemStruct * st = from; st != 0; st = st->m_next) |
| 821 | { |
| 822 | if (st->AssertIt ()) |
| 823 | nFailures += st->CheckBlock (); |
| 824 | else |
| 825 | return -1; |
| 826 | } |
| 827 | |
| 828 | return nFailures; |
| 829 | } |
| 830 | |
| 831 | // Count the number of non-wxDebugContext-related objects |
| 832 | // that are outstanding |
| 833 | int wxDebugContext::CountObjectsLeft(bool sinceCheckpoint) |
| 834 | { |
| 835 | int n = 0; |
| 836 | |
| 837 | wxMemStruct *from = NULL; |
| 838 | if (sinceCheckpoint && checkPoint) |
| 839 | from = checkPoint->m_next; |
| 840 | else |
| 841 | from = wxDebugContext::GetHead () ; |
| 842 | |
| 843 | for (wxMemStruct * st = from; st != 0; st = st->m_next) |
| 844 | { |
| 845 | void* data = st->GetActualData(); |
| 846 | if (data != (void*) wxLog::GetActiveTarget()) |
| 847 | n ++; |
| 848 | } |
| 849 | |
| 850 | return n ; |
| 851 | } |
| 852 | |
| 853 | // This function is used to output the dump |
| 854 | void wxDebugContext::OutputDumpLine(const wxChar *szFormat, ...) |
| 855 | { |
| 856 | // a buffer of 2048 bytes should be long enough for a file name |
| 857 | // and a class name |
| 858 | wxChar buf[2048]; |
| 859 | int count; |
| 860 | va_list argptr; |
| 861 | va_start(argptr, szFormat); |
| 862 | buf[sizeof(buf)/sizeof(wxChar)-1] = _T('\0'); |
| 863 | |
| 864 | // keep 3 bytes for a \r\n\0 |
| 865 | count = wxVsnprintf(buf, sizeof(buf)/sizeof(wxChar)-3, szFormat, argptr); |
| 866 | |
| 867 | if ( count < 0 ) |
| 868 | count = sizeof(buf)/sizeof(wxChar)-3; |
| 869 | buf[count]=_T('\r'); |
| 870 | buf[count+1]=_T('\n'); |
| 871 | buf[count+2]=_T('\0'); |
| 872 | |
| 873 | wxMessageOutputDebug dbgout; |
| 874 | dbgout.Printf(buf); |
| 875 | } |
| 876 | |
| 877 | |
| 878 | #if USE_THREADSAFE_MEMORY_ALLOCATION |
| 879 | static bool memSectionOk = false; |
| 880 | |
| 881 | class MemoryCriticalSection : public wxCriticalSection |
| 882 | { |
| 883 | public: |
| 884 | MemoryCriticalSection() { |
| 885 | memSectionOk = true; |
| 886 | } |
| 887 | ~MemoryCriticalSection() { |
| 888 | memSectionOk = false; |
| 889 | } |
| 890 | }; |
| 891 | |
| 892 | class MemoryCriticalSectionLocker |
| 893 | { |
| 894 | public: |
| 895 | inline MemoryCriticalSectionLocker(wxCriticalSection& critsect) |
| 896 | : m_critsect(critsect), m_locked(memSectionOk) { if(m_locked) m_critsect.Enter(); } |
| 897 | inline ~MemoryCriticalSectionLocker() { if(m_locked) m_critsect.Leave(); } |
| 898 | |
| 899 | private: |
| 900 | // no assignment operator nor copy ctor |
| 901 | MemoryCriticalSectionLocker(const MemoryCriticalSectionLocker&); |
| 902 | MemoryCriticalSectionLocker& operator=(const MemoryCriticalSectionLocker&); |
| 903 | |
| 904 | wxCriticalSection& m_critsect; |
| 905 | bool m_locked; |
| 906 | }; |
| 907 | |
| 908 | static MemoryCriticalSection memLocker; |
| 909 | |
| 910 | #endif // USE_THREADSAFE_MEMORY_ALLOCATION |
| 911 | |
| 912 | |
| 913 | #ifdef __WXDEBUG__ |
| 914 | #if !(defined(__WXMSW__) && (defined(WXUSINGDLL) || defined(WXMAKINGDLL_BASE))) |
| 915 | #if wxUSE_GLOBAL_MEMORY_OPERATORS |
| 916 | void * operator new (size_t size, wxChar * fileName, int lineNum) |
| 917 | { |
| 918 | return wxDebugAlloc(size, fileName, lineNum, false, false); |
| 919 | } |
| 920 | |
| 921 | void * operator new (size_t size) |
| 922 | { |
| 923 | return wxDebugAlloc(size, NULL, 0, false); |
| 924 | } |
| 925 | |
| 926 | void operator delete (void * buf) |
| 927 | { |
| 928 | wxDebugFree(buf, false); |
| 929 | } |
| 930 | |
| 931 | #if wxUSE_ARRAY_MEMORY_OPERATORS |
| 932 | void * operator new[] (size_t size) |
| 933 | { |
| 934 | return wxDebugAlloc(size, NULL, 0, false, true); |
| 935 | } |
| 936 | |
| 937 | void * operator new[] (size_t size, wxChar * fileName, int lineNum) |
| 938 | { |
| 939 | return wxDebugAlloc(size, fileName, lineNum, false, true); |
| 940 | } |
| 941 | |
| 942 | void operator delete[] (void * buf) |
| 943 | { |
| 944 | wxDebugFree(buf, true); |
| 945 | } |
| 946 | #endif // wxUSE_ARRAY_MEMORY_OPERATORS |
| 947 | #endif // wxUSE_GLOBAL_MEMORY_OPERATORS |
| 948 | #endif // !(defined(__WXMSW__) && (defined(WXUSINGDLL) || defined(WXMAKINGDLL_BASE))) |
| 949 | |
| 950 | // TODO: store whether this is a vector or not. |
| 951 | void * wxDebugAlloc(size_t size, wxChar * fileName, int lineNum, bool isObject, bool WXUNUSED(isVect) ) |
| 952 | { |
| 953 | #if USE_THREADSAFE_MEMORY_ALLOCATION |
| 954 | MemoryCriticalSectionLocker lock(memLocker); |
| 955 | #endif |
| 956 | |
| 957 | // If not in debugging allocation mode, do the normal thing |
| 958 | // so we don't leave any trace of ourselves in the node list. |
| 959 | |
| 960 | #if defined(__VISAGECPP__) && (__IBMCPP__ < 400 || __IBMC__ < 400 ) |
| 961 | // VA 3.0 still has trouble in here |
| 962 | return (void *)malloc(size); |
| 963 | #endif |
| 964 | if (!wxDebugContext::GetDebugMode()) |
| 965 | { |
| 966 | return (void *)malloc(size); |
| 967 | } |
| 968 | |
| 969 | int totSize = wxDebugContext::TotSize (size); |
| 970 | char * buf = (char *) malloc(totSize); |
| 971 | if (!buf) { |
| 972 | wxLogMessage(wxT("Call to malloc (%ld) failed."), (long)size); |
| 973 | return 0; |
| 974 | } |
| 975 | wxMemStruct * st = (wxMemStruct *)buf; |
| 976 | st->m_firstMarker = MemStartCheck; |
| 977 | st->m_reqSize = size; |
| 978 | st->m_fileName = fileName; |
| 979 | st->m_lineNum = lineNum; |
| 980 | st->m_id = MemStructId; |
| 981 | st->m_prev = 0; |
| 982 | st->m_next = 0; |
| 983 | st->m_isObject = isObject; |
| 984 | |
| 985 | // Errors from Append() shouldn't really happen - but just in case! |
| 986 | if (st->Append () == 0) { |
| 987 | st->ErrorMsg ("Trying to append new node"); |
| 988 | } |
| 989 | |
| 990 | if (wxDebugContext::GetCheckPrevious ()) { |
| 991 | if (st->CheckAllPrevious () < 0) { |
| 992 | st->ErrorMsg ("Checking previous nodes"); |
| 993 | } |
| 994 | } |
| 995 | |
| 996 | // Set up the extra markers at the middle and end. |
| 997 | char * ptr = wxDebugContext::MidMarkerPos (buf); |
| 998 | * (wxMarkerType *) ptr = MemMidCheck; |
| 999 | ptr = wxDebugContext::EndMarkerPos (buf, size); |
| 1000 | * (wxMarkerType *) ptr = MemEndCheck; |
| 1001 | |
| 1002 | // pointer returned points to the start of the caller's |
| 1003 | // usable area. |
| 1004 | void *m_actualData = (void *) wxDebugContext::CallerMemPos (buf); |
| 1005 | st->m_actualData = m_actualData; |
| 1006 | |
| 1007 | return m_actualData; |
| 1008 | } |
| 1009 | |
| 1010 | // TODO: check whether was allocated as a vector |
| 1011 | void wxDebugFree(void * buf, bool WXUNUSED(isVect) ) |
| 1012 | { |
| 1013 | #if USE_THREADSAFE_MEMORY_ALLOCATION |
| 1014 | MemoryCriticalSectionLocker lock(memLocker); |
| 1015 | #endif |
| 1016 | |
| 1017 | if (!buf) |
| 1018 | return; |
| 1019 | |
| 1020 | #if defined(__VISAGECPP__) && (__IBMCPP__ < 400 || __IBMC__ < 400 ) |
| 1021 | // VA 3.0 still has trouble in here |
| 1022 | free((char *)buf); |
| 1023 | #endif |
| 1024 | // If not in debugging allocation mode, do the normal thing |
| 1025 | // so we don't leave any trace of ourselves in the node list. |
| 1026 | if (!wxDebugContext::GetDebugMode()) |
| 1027 | { |
| 1028 | free((char *)buf); |
| 1029 | return; |
| 1030 | } |
| 1031 | |
| 1032 | // Points to the start of the entire allocated area. |
| 1033 | char * startPointer = wxDebugContext::StartPos ((char *) buf); |
| 1034 | // Find the struct and make sure that it's identifiable. |
| 1035 | wxMemStruct * st = (wxMemStruct *) wxDebugContext::StructPos (startPointer); |
| 1036 | |
| 1037 | if (! st->ValidateNode ()) |
| 1038 | return; |
| 1039 | |
| 1040 | // If this is the current checkpoint, we need to |
| 1041 | // move the checkpoint back so it points to a valid |
| 1042 | // node. |
| 1043 | if (st == wxDebugContext::checkPoint) |
| 1044 | wxDebugContext::checkPoint = wxDebugContext::checkPoint->m_prev; |
| 1045 | |
| 1046 | if (! st->Unlink ()) |
| 1047 | { |
| 1048 | st->ErrorMsg ("Unlinking deleted node"); |
| 1049 | } |
| 1050 | |
| 1051 | // Now put in the fill char into the id slot and the caller requested |
| 1052 | // memory locations. |
| 1053 | st->SetDeleted (); |
| 1054 | (void) memset (wxDebugContext::CallerMemPos (startPointer), MemFillChar, |
| 1055 | st->RequestSize ()); |
| 1056 | |
| 1057 | free((char *)st); |
| 1058 | } |
| 1059 | |
| 1060 | #endif // __WXDEBUG__ |
| 1061 | |
| 1062 | // Trace: send output to the current debugging stream |
| 1063 | void wxTrace(const wxChar * ...) |
| 1064 | { |
| 1065 | #if 1 |
| 1066 | wxFAIL_MSG(wxT("wxTrace is now obsolete. Please use wxDebugXXX instead.")); |
| 1067 | #else |
| 1068 | va_list ap; |
| 1069 | static wxChar buffer[512]; |
| 1070 | |
| 1071 | va_start(ap, fmt); |
| 1072 | |
| 1073 | #ifdef __WXMSW__ |
| 1074 | wvsprintf(buffer,fmt,ap) ; |
| 1075 | #else |
| 1076 | vsprintf(buffer,fmt,ap) ; |
| 1077 | #endif |
| 1078 | |
| 1079 | va_end(ap); |
| 1080 | |
| 1081 | if (wxDebugContext::HasStream()) |
| 1082 | { |
| 1083 | wxDebugContext::GetStream() << buffer; |
| 1084 | wxDebugContext::GetStream().flush(); |
| 1085 | } |
| 1086 | else |
| 1087 | #ifdef __WXMSW__ |
| 1088 | #ifdef __WIN32__ |
| 1089 | OutputDebugString((LPCTSTR)buffer) ; |
| 1090 | #else |
| 1091 | OutputDebugString((const char*) buffer) ; |
| 1092 | #endif |
| 1093 | #else |
| 1094 | fprintf(stderr, buffer); |
| 1095 | #endif |
| 1096 | #endif |
| 1097 | } |
| 1098 | |
| 1099 | // Trace with level |
| 1100 | void wxTraceLevel(int, const wxChar * ...) |
| 1101 | { |
| 1102 | #if 1 |
| 1103 | wxFAIL_MSG(wxT("wxTrace is now obsolete. Please use wxDebugXXX instead.")); |
| 1104 | #else |
| 1105 | if (wxDebugContext::GetLevel() < level) |
| 1106 | return; |
| 1107 | |
| 1108 | va_list ap; |
| 1109 | static wxChar buffer[512]; |
| 1110 | |
| 1111 | va_start(ap, fmt); |
| 1112 | |
| 1113 | #ifdef __WXMSW__ |
| 1114 | wxWvsprintf(buffer,fmt,ap) ; |
| 1115 | #else |
| 1116 | vsprintf(buffer,fmt,ap) ; |
| 1117 | #endif |
| 1118 | |
| 1119 | va_end(ap); |
| 1120 | |
| 1121 | if (wxDebugContext::HasStream()) |
| 1122 | { |
| 1123 | wxDebugContext::GetStream() << buffer; |
| 1124 | wxDebugContext::GetStream().flush(); |
| 1125 | } |
| 1126 | else |
| 1127 | #ifdef __WXMSW__ |
| 1128 | #ifdef __WIN32__ |
| 1129 | OutputDebugString((LPCTSTR)buffer) ; |
| 1130 | #else |
| 1131 | OutputDebugString((const char*) buffer) ; |
| 1132 | #endif |
| 1133 | #else |
| 1134 | fprintf(stderr, buffer); |
| 1135 | #endif |
| 1136 | #endif |
| 1137 | } |
| 1138 | |
| 1139 | //---------------------------------------------------------------------------- |
| 1140 | // Final cleanup after all global objects in all files have been destroyed |
| 1141 | //---------------------------------------------------------------------------- |
| 1142 | |
| 1143 | // Don't set it to 0 by dynamic initialization |
| 1144 | // Some compilers will really do the assignment later |
| 1145 | // All global variables are initialized to 0 at the very beginning, and this is just fine. |
| 1146 | int wxDebugContextDumpDelayCounter::sm_count; |
| 1147 | |
| 1148 | void wxDebugContextDumpDelayCounter::DoDump() |
| 1149 | { |
| 1150 | if (wxDebugContext::CountObjectsLeft(true) > 0) |
| 1151 | { |
| 1152 | wxDebugContext::OutputDumpLine(wxT("There were memory leaks.\n")); |
| 1153 | wxDebugContext::Dump(); |
| 1154 | wxDebugContext::PrintStatistics(); |
| 1155 | } |
| 1156 | } |
| 1157 | |
| 1158 | // Even if there is nothing else, make sure that there is at |
| 1159 | // least one cleanup counter object |
| 1160 | static wxDebugContextDumpDelayCounter wxDebugContextDumpDelayCounter_One; |
| 1161 | |
| 1162 | #endif // (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT |
| 1163 | |