src/common/memory.cpp

   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 and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "memory.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/defs.h"
  25 #endif
  26
  27 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
  28
  29 #ifdef __GNUG__
  30 // #pragma implementation
  31 #endif
  32
  33 #ifndef WX_PRECOMP
  34 #include "wx/utils.h"
  35 #include "wx/app.h"
  36 #endif
  37
  38 #include "wx/log.h"
  39 #include <stdlib.h>
  40
  41 #include "wx/ioswrap.h"
  42
  43 #if wxUSE_IOSTREAMH
  44     #include <fstream.h>
  45 #else
  46     #include <fstream>
  47 #endif
  48
  49 #if !defined(__WATCOMC__) && !(defined(__VMS__) && ( __VMS_VER < 70000000 ) )\
  50      && !defined( __MWERKS__ ) && !defined(__SALFORDC__)
  51 #include <memory.h>
  52 #endif
  53
  54 #include <stdarg.h>
  55 #include <string.h>
  56
  57 #ifdef __WXMSW__
  58 #include <windows.h>
  59
  60 #ifdef GetClassInfo
  61 #undef GetClassInfo
  62 #endif
  63
  64 #ifdef GetClassName
  65 #undef GetClassName
  66 #endif
  67
  68 #endif
  69
  70 #include "wx/memory.h"
  71
  72 #ifdef new
  73 #undef new
  74 #endif
  75
  76 // wxDebugContext wxTheDebugContext;
  77 /*
  78   Redefine new and delete so that we can pick up situations where:
  79         - we overwrite or underwrite areas of malloc'd memory.
  80         - we use uninitialise variables
  81   Only do this in debug mode.
  82
  83   We change new to get enough memory to allocate a struct, followed
  84   by the caller's requested memory, followed by a tag. The struct
  85   is used to create a doubly linked list of these areas and also
  86   contains another tag. The tags are used to determine when the area
  87   has been over/under written.
  88 */
  89
  90
  91 /*
  92   Values which are used to set the markers which will be tested for
  93   under/over write. There are 3 of these, one in the struct, one
  94   immediately after the struct but before the caller requested memory and
  95   one immediately after the requested memory.
  96 */
  97 #define MemStartCheck  0x23A8
  98 #define MemMidCheck  0xA328
  99 #define MemEndCheck 0x8A32
 100 #define MemFillChar 0xAF
 101 #define MemStructId  0x666D
 102
 103 /*
 104   External interface for the wxMemStruct class. Others are
 105   defined inline within the class def. Here we only need to be able
 106   to add and delete nodes from the list and handle errors in some way.
 107 */
 108
 109 /*
 110   Used for internal "this shouldn't happen" type of errors.
 111 */
 112 void wxMemStruct::ErrorMsg (const char * mesg)
 113 {
 114   wxLogMessage(wxT("wxWindows memory checking error: %s"), mesg);
 115   PrintNode ();
 116
 117 //         << m_fileName << ' ' << m_lineNum << endl;
 118 }
 119
 120 /*
 121   Used when we find an overwrite or an underwrite error.
 122 */
 123 void wxMemStruct::ErrorMsg ()
 124 {
 125   wxLogMessage(wxT("wxWindows over/underwrite memory error:"));
 126   PrintNode ();
 127
 128 //    cerr << m_fileName << ' ' << m_lineNum << endl;
 129 }
 130
 131
 132 /*
 133   We want to find out if pointers have been overwritten as soon as is
 134   possible, so test everything before we dereference it. Of course it's still
 135   quite possible that, if things have been overwritten, this function will
 136   fall over, but the only way of dealing with that would cost too much in terms
 137   of time.
 138 */
 139 int wxMemStruct::AssertList ()
 140 {
 141     if (wxDebugContext::GetHead () != 0 && ! (wxDebugContext::GetHead ())->AssertIt () ||
 142         wxDebugContext::GetTail () != 0 && ! wxDebugContext::GetTail ()->AssertIt ()) {
 143         ErrorMsg ("Head or tail pointers trashed");
 144         return 0;
 145     }
 146     return 1;
 147 }
 148
 149
 150 /*
 151   Check that the thing we're pointing to has the correct id for a wxMemStruct
 152   object and also that it's previous and next pointers are pointing at objects
 153   which have valid ids.
 154   This is definitely not perfect since we could fall over just trying to access
 155   any of the slots which we use here, but I think it's about the best that I
 156   can do without doing something like taking all new wxMemStruct pointers and
 157   comparing them against all known pointer within the list and then only
 158   doing this sort of check _after_ you've found the pointer in the list. That
 159   would be safer, but also much more time consuming.
 160 */
 161 int wxMemStruct::AssertIt ()
 162 {
 163     return (m_id == MemStructId &&
 164             (m_prev == 0 || m_prev->m_id == MemStructId) &&
 165             (m_next == 0 || m_next->m_id == MemStructId));
 166 }
 167
 168
 169 /*
 170   Additions are always at the tail of the list.
 171   Returns 0 on error, non-zero on success.
 172 */
 173 int wxMemStruct::Append ()
 174 {
 175     if (! AssertList ())
 176         return 0;
 177
 178     if (wxDebugContext::GetHead () == 0) {
 179         if (wxDebugContext::GetTail () != 0) {
 180             ErrorMsg ("Null list should have a null tail pointer");
 181             return 0;
 182         }
 183         (void) wxDebugContext::SetHead (this);
 184         (void) wxDebugContext::SetTail (this);
 185     } else {
 186         wxDebugContext::GetTail ()->m_next = this;
 187         this->m_prev = wxDebugContext::GetTail ();
 188         (void) wxDebugContext::SetTail (this);
 189     }
 190     return 1;
 191 }
 192
 193
 194 /*
 195   Don't actually free up anything here as the space which is used
 196   by the node will be free'd up when the whole block is free'd.
 197   Returns 0 on error, non-zero on success.
 198 */
 199 int wxMemStruct::Unlink ()
 200 {
 201     if (! AssertList ())
 202         return 0;
 203
 204     if (wxDebugContext::GetHead () == 0 || wxDebugContext::GetTail () == 0) {
 205         ErrorMsg ("Trying to remove node from empty list");
 206         return 0;
 207     }
 208
 209     // Handle the part of the list before this node.
 210     if (m_prev == 0) {
 211         if (this != wxDebugContext::GetHead ()) {
 212             ErrorMsg ("No previous node for non-head node");
 213             return 0;
 214         }
 215         (void) wxDebugContext::SetHead (m_next);
 216     } else {
 217         if (! m_prev->AssertIt ()) {
 218             ErrorMsg ("Trashed previous pointer");
 219             return 0;
 220         }
 221
 222         if (m_prev->m_next != this) {
 223             ErrorMsg ("List is inconsistent");
 224             return 0;
 225         }
 226         m_prev->m_next = m_next;
 227     }
 228
 229     // Handle the part of the list after this node.
 230     if (m_next == 0) {
 231         if (this != wxDebugContext::GetTail ()) {
 232             ErrorMsg ("No next node for non-tail node");
 233             return 0;
 234         }
 235         (void) wxDebugContext::SetTail (m_prev);
 236     } else {
 237         if (! m_next->AssertIt ()) {
 238             ErrorMsg ("Trashed next pointer");
 239             return 0;
 240         }
 241
 242         if (m_next->m_prev != this) {
 243             ErrorMsg ("List is inconsistent");
 244             return 0;
 245         }
 246         m_next->m_prev = m_prev;
 247     }
 248
 249     return 1;
 250 }
 251
 252
 253
 254 /*
 255   Checks a node and block of memory to see that the markers are still
 256   intact.
 257 */
 258 int wxMemStruct::CheckBlock ()
 259 {
 260     int nFailures = 0;
 261
 262     if (m_firstMarker != MemStartCheck) {
 263         nFailures++;
 264         ErrorMsg ();
 265     }
 266
 267     char * pointer = wxDebugContext::MidMarkerPos ((char *) this);
 268     if (* (wxMarkerType *) pointer != MemMidCheck) {
 269         nFailures++;
 270         ErrorMsg ();
 271     }
 272
 273     pointer = wxDebugContext::EndMarkerPos ((char *) this, RequestSize ());
 274     if (* (wxMarkerType *) pointer != MemEndCheck) {
 275         nFailures++;
 276         ErrorMsg ();
 277     }
 278
 279     return nFailures;
 280 }
 281
 282
 283 /*
 284   Check the list of nodes to see if they are all ok.
 285 */
 286 int wxMemStruct::CheckAllPrevious ()
 287 {
 288     int nFailures = 0;
 289
 290     for (wxMemStruct * st = this->m_prev; st != 0; st = st->m_prev) {
 291         if (st->AssertIt ())
 292             nFailures += st->CheckBlock ();
 293         else
 294             return -1;
 295     }
 296
 297     return nFailures;
 298 }
 299
 300
 301 /*
 302   When we delete a node we set the id slot to a specific value and then test
 303   against this to see if a nodes have been deleted previously. I don't
 304   just set the entire memory to the fillChar because then I'd be overwriting
 305   useful stuff like the vtbl which may be needed to output the error message
 306   including the file name and line numbers. Without this info the whole point
 307   of this class is lost!
 308 */
 309 void wxMemStruct::SetDeleted ()
 310 {
 311     m_id = MemFillChar;
 312 }
 313
 314 int wxMemStruct::IsDeleted ()
 315 {
 316     return (m_id == MemFillChar);
 317 }
 318
 319
 320 /*
 321   Print out a single node. There are many far better ways of doing this
 322   but this will suffice for now.
 323 */
 324 void wxMemStruct::PrintNode ()
 325 {
 326   if (m_isObject)
 327   {
 328     wxObject *obj = (wxObject *)m_actualData;
 329     wxClassInfo *info = obj->GetClassInfo();
 330
 331     // Let's put this in standard form so IDEs can load the file at the appropriate
 332     // line
 333     wxString msg(wxT(""));
 334
 335     if (m_fileName)
 336       msg.Printf(wxT("%s(%d): "), m_fileName, (int)m_lineNum);
 337
 338     if (info && info->GetClassName())
 339       msg += info->GetClassName();
 340     else
 341       msg += wxT("object");
 342
 343     wxString msg2;
 344     msg2.Printf(wxT(" at $%lX, size %d"), (long)GetActualData(), (int)RequestSize());
 345     msg += msg2;
 346
 347     wxLogMessage(msg);
 348   }
 349   else
 350   {
 351     wxString msg("");
 352
 353     if (m_fileName)
 354       msg.Printf(wxT("%s(%d): "), m_fileName, (int)m_lineNum);
 355     msg += wxT("non-object data");
 356     wxString msg2;
 357     msg2.Printf(wxT(" at $%lX, size %d\n"), (long)GetActualData(), (int)RequestSize());
 358     msg += msg2;
 359
 360     wxLogMessage(msg);
 361   }
 362 }
 363
 364 void wxMemStruct::Dump ()
 365 {
 366   if (!ValidateNode()) return;
 367
 368   if (m_isObject)
 369   {
 370     wxObject *obj = (wxObject *)m_actualData;
 371
 372     wxString msg(wxT(""));
 373     if (m_fileName)
 374       msg.Printf(wxT("%s(%d): "), m_fileName, (int)m_lineNum);
 375
 376
 377     /* TODO: We no longer have a stream (using wxLogDebug) so we can't dump it.
 378      * Instead, do what wxObject::Dump does.
 379      * What should we do long-term, eliminate Dumping? Or specify
 380      * that MyClass::Dump should use wxLogDebug? Ugh.
 381     obj->Dump(wxDebugContext::GetStream());
 382      */
 383
 384     if (obj->GetClassInfo() && obj->GetClassInfo()->GetClassName())
 385       msg += obj->GetClassInfo()->GetClassName();
 386     else
 387       msg += wxT("unknown object class");
 388
 389     wxString msg2("");
 390     msg2.Printf(wxT(" at $%lX, size %d"), (long)GetActualData(), (int)RequestSize());
 391     msg += msg2;
 392
 393     wxLogMessage(msg);
 394   }
 395   else
 396   {
 397     wxString msg(wxT(""));
 398     if (m_fileName)
 399       msg.Printf(wxT("%s(%d): "), m_fileName, (int)m_lineNum);
 400
 401     wxString msg2("");
 402     msg2.Printf(wxT("non-object data at $%lX, size %d"), (long)GetActualData(), (int)RequestSize() );
 403     msg += msg2;
 404     wxLogMessage(msg);
 405   }
 406 }
 407
 408
 409 /*
 410   Validate a node. Check to see that the node is "clean" in the sense
 411   that nothing has over/underwritten it etc.
 412 */
 413 int wxMemStruct::ValidateNode ()
 414 {
 415     char * startPointer = (char *) this;
 416     if (!AssertIt ()) {
 417         if (IsDeleted ())
 418             ErrorMsg ("Object already deleted");
 419         else {
 420             // Can't use the error routines as we have no recognisable object.
 421 #ifndef __WXGTK__
 422              wxLogMessage(wxT("Can't verify memory struct - all bets are off!"));
 423 #endif
 424         }
 425         return 0;
 426     }
 427
 428 /*
 429     int i;
 430     for (i = 0; i < wxDebugContext::TotSize (requestSize ()); i++)
 431       cout << startPointer [i];
 432     cout << endl;
 433 */
 434     if (Marker () != MemStartCheck)
 435       ErrorMsg ();
 436     if (* (wxMarkerType *) wxDebugContext::MidMarkerPos (startPointer) != MemMidCheck)
 437       ErrorMsg ();
 438     if (* (wxMarkerType *) wxDebugContext::EndMarkerPos (startPointer,
 439                                               RequestSize ()) !=
 440         MemEndCheck)
 441       ErrorMsg ();
 442
 443     // Back to before the extra buffer and check that
 444     // we can still read what we originally wrote.
 445     if (Marker () != MemStartCheck ||
 446         * (wxMarkerType *) wxDebugContext::MidMarkerPos (startPointer)
 447                          != MemMidCheck ||
 448         * (wxMarkerType *) wxDebugContext::EndMarkerPos (startPointer,
 449                                               RequestSize ()) != MemEndCheck)
 450     {
 451         ErrorMsg ();
 452         return 0;
 453     }
 454
 455     return 1;
 456 }
 457
 458 /*
 459   The wxDebugContext class.
 460 */
 461
 462 wxMemStruct *wxDebugContext::m_head = NULL;
 463 wxMemStruct *wxDebugContext::m_tail = NULL;
 464 // ostream *wxDebugContext::m_debugStream = NULL;
 465 // streambuf *wxDebugContext::m_streamBuf = NULL;
 466
 467 // Must initialise these in wxEntry, and then delete them just before wxEntry exits
 468 streambuf *wxDebugContext::m_streamBuf = NULL;
 469 ostream *wxDebugContext::m_debugStream = NULL;
 470
 471 bool wxDebugContext::m_checkPrevious = FALSE;
 472 int wxDebugContext::debugLevel = 1;
 473 bool wxDebugContext::debugOn = TRUE;
 474 wxMemStruct *wxDebugContext::checkPoint = NULL;
 475
 476 // For faster alignment calculation
 477 static wxMarkerType markerCalc[2];
 478 int wxDebugContext::m_balign = (int)((char *)&markerCalc[1] - (char*)&markerCalc[0]);
 479 int wxDebugContext::m_balignmask = (int)((char *)&markerCalc[1] - (char*)&markerCalc[0]) - 1;
 480
 481 wxDebugContext::wxDebugContext(void)
 482 {
 483 //  m_streamBuf = new wxDebugStreamBuf;
 484 //  m_debugStream = new ostream(m_streamBuf);
 485 }
 486
 487 wxDebugContext::~wxDebugContext(void)
 488 {
 489   SetStream(NULL, NULL);
 490 }
 491
 492 /*
 493  * It's bizarre, but with BC++ 4.5, the value of str changes
 494  * between SetFile and SetStream.
 495  */
 496
 497 void wxDebugContext::SetStream(ostream *str, streambuf *buf)
 498 {
 499   if (m_debugStream)
 500   {
 501     m_debugStream->flush();
 502     delete m_debugStream;
 503   }
 504   m_debugStream = NULL;
 505
 506   // Not allowed in Watcom (~streambuf is protected).
 507   // Is this trying to say something significant to us??
 508 #ifndef __WATCOMC__
 509   if (m_streamBuf)
 510   {
 511     streambuf* oldBuf = m_streamBuf;
 512     m_streamBuf = NULL;
 513     delete oldBuf;
 514   }
 515 #endif
 516   m_streamBuf = buf;
 517   m_debugStream = str;
 518 }
 519
 520 bool wxDebugContext::SetFile(const wxString& file)
 521 {
 522   ofstream *str = new ofstream(file.fn_str());
 523
 524   if (str->bad())
 525   {
 526     delete str;
 527     return FALSE;
 528   }
 529   else
 530   {
 531     SetStream(str);
 532     return TRUE;
 533   }
 534 }
 535
 536 bool wxDebugContext::SetStandardError(void)
 537 {
 538     // Obsolete
 539 #if 0
 540 #if !defined(_WINDLL)
 541   wxDebugStreamBuf *buf = new wxDebugStreamBuf;
 542   ostream *stream = new ostream(m_streamBuf);
 543   SetStream(stream, buf);
 544   return TRUE;
 545 #else
 546   return FALSE;
 547 #endif
 548 #endif
 549   return FALSE;
 550 }
 551
 552
 553 /*
 554   Work out the positions of the markers by creating an array of 2 markers
 555   and comparing the addresses of the 2 elements. Use this number as the
 556   alignment for markers.
 557 */
 558 size_t wxDebugContext::CalcAlignment ()
 559 {
 560     wxMarkerType ar[2];
 561     return (char *) &ar[1] - (char *) &ar[0];
 562 }
 563
 564
 565 char * wxDebugContext::StructPos (const char * buf)
 566 {
 567     return (char *) buf;
 568 }
 569
 570 char * wxDebugContext::MidMarkerPos (const char * buf)
 571 {
 572     return StructPos (buf) + PaddedSize (sizeof (wxMemStruct));
 573 }
 574
 575 char * wxDebugContext::CallerMemPos (const char * buf)
 576 {
 577     return MidMarkerPos (buf) + PaddedSize (sizeof(wxMarkerType));
 578 }
 579
 580
 581 char * wxDebugContext::EndMarkerPos (const char * buf, const size_t size)
 582 {
 583     return CallerMemPos (buf) + PaddedSize (size);
 584 }
 585
 586
 587 /*
 588   Slightly different as this takes a pointer to the start of the caller
 589   requested region and returns a pointer to the start of the buffer.
 590   */
 591 char * wxDebugContext::StartPos (const char * caller)
 592 {
 593     return ((char *) (caller - wxDebugContext::PaddedSize (sizeof(wxMarkerType)) -
 594             wxDebugContext::PaddedSize (sizeof (wxMemStruct))));
 595 }
 596
 597 /*
 598   We may need padding between various parts of the allocated memory.
 599   Given a size of memory, this returns the amount of memory which should
 600   be allocated in order to allow for alignment of the following object.
 601
 602   I don't know how portable this stuff is, but it seems to work for me at
 603   the moment. It would be real nice if I knew more about this!
 604
 605   // Note: this function is now obsolete (along with CalcAlignment)
 606   // because the calculations are done statically, for greater speed.
 607 */
 608 size_t wxDebugContext::GetPadding (const size_t size)
 609 {
 610     size_t pad = size % CalcAlignment ();
 611     return (pad) ? sizeof(wxMarkerType) - pad : 0;
 612 }
 613
 614 size_t wxDebugContext::PaddedSize (const size_t size)
 615 {
 616     // Added by Terry Farnham <TJRT@pacbell.net> to replace
 617     // slow GetPadding call.
 618         int padb;
 619
 620         padb = size & m_balignmask;
 621         if(padb)
 622                 return(size + m_balign - padb);
 623         else
 624                 return(size);
 625
 626 // Old (slow) code
 627 #if 0
 628     return size + GetPadding (size);
 629 #endif
 630 }
 631
 632 /*
 633   Returns the total amount of memory which we need to get from the system
 634   in order to satisfy a caller request. This includes space for the struct
 635   plus markers and the caller's memory as well.
 636 */
 637 size_t wxDebugContext::TotSize (const size_t reqSize)
 638 {
 639     return (PaddedSize (sizeof (wxMemStruct)) + PaddedSize (reqSize) +
 640             2 * sizeof(wxMarkerType));
 641 }
 642
 643
 644 /*
 645   Traverse the list of nodes executing the given function on each node.
 646 */
 647 void wxDebugContext::TraverseList (PmSFV func, wxMemStruct *from)
 648 {
 649   if (!from)
 650     from = wxDebugContext::GetHead ();
 651
 652   for (wxMemStruct * st = from; st != 0; st = st->m_next)
 653   {
 654       void* data = st->GetActualData();
 655 //      if ((data != (void*)m_debugStream) && (data != (void*) m_streamBuf))
 656       if (data != (void*) wxLog::GetActiveTarget())
 657       {
 658         (st->*func) ();
 659       }
 660   }
 661 }
 662
 663
 664 /*
 665   Print out the list.
 666   */
 667 bool wxDebugContext::PrintList (void)
 668 {
 669 #ifdef __WXDEBUG__
 670 //  if (!HasStream())
 671 //    return FALSE;
 672
 673   TraverseList ((PmSFV)&wxMemStruct::PrintNode, (checkPoint ? checkPoint->m_next : (wxMemStruct*)NULL));
 674
 675   return TRUE;
 676 #else
 677   return FALSE;
 678 #endif
 679 }
 680
 681 bool wxDebugContext::Dump(void)
 682 {
 683 #ifdef __WXDEBUG__
 684 //  if (!HasStream())
 685 //    return FALSE;
 686
 687 //  if (TRUE)
 688   {
 689     wxChar* appName = wxT("application");
 690     wxString appNameStr("");
 691     if (wxTheApp)
 692     {
 693         appNameStr = wxTheApp->GetAppName();
 694         appName = WXSTRINGCAST appNameStr;
 695         wxLogMessage(wxT("----- Memory dump of %s at %s -----"), appName, WXSTRINGCAST wxNow() );
 696     }
 697     else
 698     {
 699       wxLogMessage( wxT("----- Memory dump -----") );
 700     }
 701   }
 702   TraverseList ((PmSFV)&wxMemStruct::Dump, (checkPoint ? checkPoint->m_next : (wxMemStruct*)NULL));
 703
 704   wxLogMessage( wxT("") );
 705   wxLogMessage( wxT("") );
 706
 707   return TRUE;
 708 #else
 709   return FALSE;
 710 #endif
 711 }
 712
 713 struct wxDebugStatsStruct
 714 {
 715   long instanceCount;
 716   long totalSize;
 717   wxChar *instanceClass;
 718   wxDebugStatsStruct *next;
 719 };
 720
 721 static wxDebugStatsStruct *FindStatsStruct(wxDebugStatsStruct *st, wxChar *name)
 722 {
 723   while (st)
 724   {
 725     if (wxStrcmp(st->instanceClass, name) == 0)
 726       return st;
 727     st = st->next;
 728   }
 729   return NULL;
 730 }
 731
 732 static wxDebugStatsStruct *InsertStatsStruct(wxDebugStatsStruct *head, wxDebugStatsStruct *st)
 733 {
 734   st->next = head;
 735   return st;
 736 }
 737
 738 bool wxDebugContext::PrintStatistics(bool detailed)
 739 {
 740 #ifdef __WXDEBUG__
 741 //  if (!HasStream())
 742 //    return FALSE;
 743
 744 //  if (TRUE)
 745   {
 746     wxChar* appName = wxT("application");
 747     wxString appNameStr(wxT(""));
 748     if (wxTheApp)
 749     {
 750         appNameStr = wxTheApp->GetAppName();
 751         appName = WXSTRINGCAST appNameStr;
 752         wxLogMessage(wxT("----- Memory statistics of %s at %s -----"), appName, WXSTRINGCAST wxNow() );
 753     }
 754     else
 755     {
 756       wxLogMessage( wxT("----- Memory statistics -----") );
 757     }
 758   }
 759
 760   bool currentMode = GetDebugMode();
 761   SetDebugMode(FALSE);
 762
 763   long noNonObjectNodes = 0;
 764   long noObjectNodes = 0;
 765   long totalSize = 0;
 766
 767   wxDebugStatsStruct *list = NULL;
 768
 769   wxMemStruct *from = (checkPoint ? checkPoint->m_next : (wxMemStruct*)NULL );
 770   if (!from)
 771     from = wxDebugContext::GetHead ();
 772
 773   wxMemStruct *st;
 774   for (st = from; st != 0; st = st->m_next)
 775   {
 776     void* data = st->GetActualData();
 777 //    if (detailed && (data != (void*)m_debugStream) && (data != (void*) m_streamBuf))
 778       if (detailed && (data != (void*) wxLog::GetActiveTarget()))
 779     {
 780       wxChar *className = wxT("nonobject");
 781       if (st->m_isObject && st->GetActualData())
 782       {
 783         wxObject *obj = (wxObject *)st->GetActualData();
 784         if (obj->GetClassInfo()->GetClassName())
 785           className = obj->GetClassInfo()->GetClassName();
 786       }
 787       wxDebugStatsStruct *stats = FindStatsStruct(list, className);
 788       if (!stats)
 789       {
 790         stats = (wxDebugStatsStruct *)malloc(sizeof(wxDebugStatsStruct));
 791         stats->instanceClass = className;
 792         stats->instanceCount = 0;
 793         stats->totalSize = 0;
 794         list = InsertStatsStruct(list, stats);
 795       }
 796       stats->instanceCount ++;
 797       stats->totalSize += st->RequestSize();
 798     }
 799
 800 //    if ((data != (void*)m_debugStream) && (data != (void*) m_streamBuf))
 801     if (data != (void*) wxLog::GetActiveTarget())
 802     {
 803         totalSize += st->RequestSize();
 804         if (st->m_isObject)
 805             noObjectNodes ++;
 806         else
 807             noNonObjectNodes ++;
 808     }
 809   }
 810
 811   if (detailed)
 812   {
 813     while (list)
 814     {
 815       wxLogMessage(wxT("%ld objects of class %s, total size %ld"),
 816           list->instanceCount, list->instanceClass, list->totalSize);
 817       wxDebugStatsStruct *old = list;
 818       list = old->next;
 819       free((char *)old);
 820     }
 821     wxLogMessage(wxT(""));
 822   }
 823
 824   SetDebugMode(currentMode);
 825
 826   wxLogMessage(wxT("Number of object items: %ld"), noObjectNodes);
 827   wxLogMessage(wxT("Number of non-object items: %ld"), noNonObjectNodes);
 828   wxLogMessage(wxT("Total allocated size: %ld"), totalSize);
 829   wxLogMessage(wxT(""));
 830   wxLogMessage(wxT(""));
 831
 832   return TRUE;
 833 #else
 834   return FALSE;
 835 #endif
 836 }
 837
 838 bool wxDebugContext::PrintClasses(void)
 839 {
 840 //  if (!HasStream())
 841 //    return FALSE;
 842
 843 //  if (TRUE)
 844   {
 845     wxChar* appName = wxT("application");
 846     wxString appNameStr(wxT(""));
 847     if (wxTheApp)
 848     {
 849         appNameStr = wxTheApp->GetAppName();
 850         appName = WXSTRINGCAST appNameStr;
 851         wxLogMessage(wxT("----- Classes in %s -----"), appName);
 852     }
 853   }
 854
 855   int n = 0;
 856   wxNode *node;
 857   wxClassInfo *info;
 858
 859   wxClassInfo::sm_classTable->BeginFind();
 860   node = wxClassInfo::sm_classTable->Next();
 861   while (node)
 862   {
 863     info = (wxClassInfo *)node->Data();
 864     if (info->GetClassName())
 865     {
 866         wxString msg(info->GetClassName());
 867         msg += wxT(" ");
 868
 869         if (info->GetBaseClassName1() && !info->GetBaseClassName2())
 870         {
 871             msg += wxT("is a ");
 872             msg += info->GetBaseClassName1();
 873         }
 874         else if (info->GetBaseClassName1() && info->GetBaseClassName2())
 875         {
 876             msg += wxT("is a ");
 877             msg += info->GetBaseClassName1() ;
 878             msg += wxT(", ");
 879             msg += info->GetBaseClassName2() ;
 880         }
 881         if (info->GetConstructor())
 882             msg += wxT(": dynamic");
 883
 884         wxLogMessage(msg);
 885     }
 886     node = wxClassInfo::sm_classTable->Next();
 887     n ++;
 888   }
 889   wxLogMessage(wxT(""));
 890   wxLogMessage(wxT("There are %d classes derived from wxObject."), n);
 891   wxLogMessage(wxT(""));
 892   wxLogMessage(wxT(""));
 893   return TRUE;
 894 }
 895
 896 void wxDebugContext::SetCheckpoint(bool all)
 897 {
 898   if (all)
 899     checkPoint = NULL;
 900   else
 901     checkPoint = m_tail;
 902 }
 903
 904 // Checks all nodes since checkpoint, or since start.
 905 int wxDebugContext::Check(bool checkAll)
 906 {
 907   int nFailures = 0;
 908
 909   wxMemStruct *from = (checkPoint ? checkPoint->m_next : (wxMemStruct*)NULL );
 910   if (!from || checkAll)
 911     from = wxDebugContext::GetHead ();
 912
 913   for (wxMemStruct * st = from; st != 0; st = st->m_next)
 914   {
 915     if (st->AssertIt ())
 916       nFailures += st->CheckBlock ();
 917     else
 918       return -1;
 919   }
 920
 921   return nFailures;
 922 }
 923
 924 // Count the number of non-wxDebugContext-related objects
 925 // that are outstanding
 926 int wxDebugContext::CountObjectsLeft(bool sinceCheckpoint)
 927 {
 928   int n = 0;
 929
 930   wxMemStruct *from = NULL;
 931   if (sinceCheckpoint && checkPoint)
 932     from = checkPoint->m_next;
 933   else
 934     from = wxDebugContext::GetHead () ;
 935
 936   for (wxMemStruct * st = from; st != 0; st = st->m_next)
 937   {
 938       void* data = st->GetActualData();
 939 //      if ((data != (void*)m_debugStream) && (data != (void*) m_streamBuf))
 940       if (data != (void*) wxLog::GetActiveTarget())
 941           n ++;
 942   }
 943
 944   return n ;
 945 }
 946
 947 /*
 948   The global operator new used for everything apart from getting
 949   dynamic storage within this function itself.
 950 */
 951
 952 // We'll only do malloc and free for the moment: leave the interesting
 953 // stuff for the wxObject versions.
 954
 955 #if defined(__WXDEBUG__) && wxUSE_GLOBAL_MEMORY_OPERATORS
 956
 957 #ifdef new
 958 #undef new
 959 #endif
 960
 961 // Seems OK all of a sudden. Maybe to do with linking with multithreaded library?
 962 #if 0 // def __VISUALC__
 963 #define NO_DEBUG_ALLOCATION
 964 #endif
 965
 966 // Unfortunately ~wxDebugStreamBuf doesn't work (VC++ 5) when we enable the debugging
 967 // code. I have no idea why. In BC++ 4.5, we have a similar problem the debug
 968 // stream myseriously changing pointer address between being passed from SetFile to SetStream.
 969 // See docs/msw/issues.txt.
 970 void * operator new (size_t size, wxChar * fileName, int lineNum)
 971 {
 972 #ifdef NO_DEBUG_ALLOCATION
 973   return malloc(size);
 974 #else
 975   return wxDebugAlloc(size, fileName, lineNum, FALSE, FALSE);
 976 #endif
 977 }
 978
 979 // Added JACS 25/11/98
 980 void * operator new (size_t size)
 981 {
 982 #ifdef NO_DEBUG_ALLOCATION
 983   return malloc(size);
 984 #else
 985   return wxDebugAlloc(size, NULL, 0, FALSE);
 986 #endif
 987 }
 988
 989 #if wxUSE_ARRAY_MEMORY_OPERATORS
 990 void * operator new[] (size_t size)
 991 {
 992 #ifdef NO_DEBUG_ALLOCATION
 993   return malloc(size);
 994 #else
 995   return wxDebugAlloc(size, NULL, 0, FALSE, TRUE);
 996 #endif
 997 }
 998 #endif
 999
1000 #if wxUSE_ARRAY_MEMORY_OPERATORS
1001 void * operator new[] (size_t size, wxChar * fileName, int lineNum)
1002 {
1003 #ifdef NO_DEBUG_ALLOCATION
1004   return malloc(size);
1005 #else
1006   return wxDebugAlloc(size, fileName, lineNum, FALSE, TRUE);
1007 #endif
1008 }
1009 #endif
1010
1011 #if !defined(__VISAGECPP__) // already defines this by default
1012 void operator delete (void * buf)
1013 {
1014 #ifdef NO_DEBUG_ALLOCATION
1015   free((char*) buf);
1016 #else
1017   wxDebugFree(buf);
1018 #endif
1019 }
1020 #endif
1021
1022 // VC++ 6.0
1023 #if defined(__VISUALC__) && (__VISUALC__ >= 1200)
1024 void operator delete(void* pData, wxChar* /* fileName */, int /* lineNum */)
1025 {
1026   wxDebugFree(pData, FALSE);
1027 }
1028 // New operator 21/11/1998
1029 void operator delete[](void* pData, char* /* fileName */, int /* lineNum */)
1030 {
1031   wxDebugFree(pData, TRUE);
1032 }
1033 #endif
1034
1035 #if wxUSE_ARRAY_MEMORY_OPERATORS
1036
1037 void operator delete[] (void * buf)
1038 {
1039 #ifdef NO_DEBUG_ALLOCATION
1040   free((char*) buf);
1041 #else
1042   wxDebugFree(buf, TRUE);
1043 #endif
1044 }
1045 #endif
1046
1047 #endif
1048
1049 // TODO: store whether this is a vector or not.
1050 void * wxDebugAlloc(size_t size, wxChar * fileName, int lineNum, bool isObject, bool WXUNUSED(isVect) )
1051 {
1052   // If not in debugging allocation mode, do the normal thing
1053   // so we don't leave any trace of ourselves in the node list.
1054
1055   if (!wxDebugContext::GetDebugMode())
1056   {
1057     return (void *)malloc(size);
1058   }
1059
1060     int totSize = wxDebugContext::TotSize (size);
1061     char * buf = (char *) malloc(totSize);
1062     if (!buf) {
1063         wxLogMessage(wxT("Call to malloc (%ld) failed."), (long)size);
1064         return 0;
1065     }
1066     wxMemStruct * st = (wxMemStruct *)buf;
1067     st->m_firstMarker = MemStartCheck;
1068     st->m_reqSize = size;
1069     st->m_fileName = fileName;
1070     st->m_lineNum = lineNum;
1071     st->m_id = MemStructId;
1072     st->m_prev = 0;
1073     st->m_next = 0;
1074     st->m_isObject = isObject;
1075
1076     // Errors from Append() shouldn't really happen - but just in case!
1077     if (st->Append () == 0) {
1078         st->ErrorMsg ("Trying to append new node");
1079     }
1080
1081     if (wxDebugContext::GetCheckPrevious ()) {
1082         if (st->CheckAllPrevious () < 0) {
1083             st->ErrorMsg ("Checking previous nodes");
1084         }
1085     }
1086
1087     // Set up the extra markers at the middle and end.
1088     char * ptr = wxDebugContext::MidMarkerPos (buf);
1089     * (wxMarkerType *) ptr = MemMidCheck;
1090     ptr = wxDebugContext::EndMarkerPos (buf, size);
1091     * (wxMarkerType *) ptr = MemEndCheck;
1092
1093     // pointer returned points to the start of the caller's
1094     // usable area.
1095     void *m_actualData = (void *) wxDebugContext::CallerMemPos (buf);
1096     st->m_actualData = m_actualData;
1097
1098     return m_actualData;
1099 }
1100
1101 // TODO: check whether was allocated as a vector
1102 void wxDebugFree(void * buf, bool WXUNUSED(isVect) )
1103 {
1104   if (!buf)
1105     return;
1106
1107   // If not in debugging allocation mode, do the normal thing
1108   // so we don't leave any trace of ourselves in the node list.
1109   if (!wxDebugContext::GetDebugMode())
1110   {
1111     free((char *)buf);
1112     return;
1113   }
1114
1115     // Points to the start of the entire allocated area.
1116     char * startPointer = wxDebugContext::StartPos ((char *) buf);
1117     // Find the struct and make sure that it's identifiable.
1118     wxMemStruct * st = (wxMemStruct *) wxDebugContext::StructPos (startPointer);
1119
1120     if (! st->ValidateNode ())
1121         return;
1122
1123     // If this is the current checkpoint, we need to
1124     // move the checkpoint back so it points to a valid
1125     // node.
1126     if (st == wxDebugContext::checkPoint)
1127       wxDebugContext::checkPoint = wxDebugContext::checkPoint->m_prev;
1128
1129     if (! st->Unlink ())
1130     {
1131       st->ErrorMsg ("Unlinking deleted node");
1132     }
1133
1134     // Now put in the fill char into the id slot and the caller requested
1135     // memory locations.
1136     st->SetDeleted ();
1137     (void) memset (wxDebugContext::CallerMemPos (startPointer), MemFillChar,
1138                    st->RequestSize ());
1139
1140     // Don't allow delayed freeing of memory in this version
1141 //    if (!wxDebugContext::GetDelayFree())
1142 //    free((void *)st);
1143     free((char *)st);
1144 }
1145
1146 // Trace: send output to the current debugging stream
1147 void wxTrace(const wxChar *fmt ...)
1148 {
1149   va_list ap;
1150   static wxChar buffer[512];
1151
1152   va_start(ap, fmt);
1153
1154 #ifdef __WXMSW__
1155   wvsprintf(buffer,fmt,ap) ;
1156 #else
1157   vsprintf(buffer,fmt,ap) ;
1158 #endif
1159
1160   va_end(ap);
1161
1162   if (wxDebugContext::HasStream())
1163   {
1164     wxDebugContext::GetStream() << buffer;
1165     wxDebugContext::GetStream().flush();
1166   }
1167   else
1168 #ifdef __WXMSW__
1169 #ifdef __WIN32__
1170     OutputDebugString((LPCTSTR)buffer) ;
1171 #else
1172     OutputDebugString((const char*) buffer) ;
1173 #endif
1174 #else
1175     fprintf(stderr, buffer);
1176 #endif
1177 }
1178
1179 // Trace with level
1180 void wxTraceLevel(int level, const wxChar *fmt ...)
1181 {
1182   if (wxDebugContext::GetLevel() < level)
1183     return;
1184
1185   va_list ap;
1186   static wxChar buffer[512];
1187
1188   va_start(ap, fmt);
1189
1190 #ifdef __WXMSW__
1191   wvsprintf(buffer,fmt,ap) ;
1192 #else
1193   vsprintf(buffer,fmt,ap) ;
1194 #endif
1195
1196   va_end(ap);
1197
1198   if (wxDebugContext::HasStream())
1199   {
1200     wxDebugContext::GetStream() << buffer;
1201     wxDebugContext::GetStream().flush();
1202   }
1203   else
1204 #ifdef __WXMSW__
1205 #ifdef __WIN32__
1206     OutputDebugString((LPCTSTR)buffer) ;
1207 #else
1208     OutputDebugString((const char*) buffer) ;
1209 #endif
1210 #else
1211     fprintf(stderr, buffer);
1212 #endif
1213 }
1214
1215 #else // wxUSE_MEMORY_TRACING && defined(__WXDEBUG__)
1216 void wxTrace(const char *WXUNUSED(fmt) ...)
1217 {
1218 }
1219
1220 void wxTraceLevel(int WXUNUSED(level), const char *WXUNUSED(fmt) ...)
1221 {
1222 }
1223 #endif
1224