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.mb_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   wxMemStruct * st = NULL;
 653   for (st = from; st != 0; st = st->m_next)
 654   {
 655       void* data = st->GetActualData();
 656 //      if ((data != (void*)m_debugStream) && (data != (void*) m_streamBuf))
 657       if (data != (void*) wxLog::GetActiveTarget())
 658       {
 659         (st->*func) ();
 660       }
 661   }
 662 }
 663
 664
 665 /*
 666   Print out the list.
 667   */
 668 bool wxDebugContext::PrintList (void)
 669 {
 670 #ifdef __WXDEBUG__
 671 //  if (!HasStream())
 672 //    return FALSE;
 673
 674   TraverseList ((PmSFV)&wxMemStruct::PrintNode, (checkPoint ? checkPoint->m_next : (wxMemStruct*)NULL));
 675
 676   return TRUE;
 677 #else
 678   return FALSE;
 679 #endif
 680 }
 681
 682 bool wxDebugContext::Dump(void)
 683 {
 684 #ifdef __WXDEBUG__
 685 //  if (!HasStream())
 686 //    return FALSE;
 687
 688 //  if (TRUE)
 689   {
 690     wxChar* appName = wxT("application");
 691     wxString appNameStr("");
 692     if (wxTheApp)
 693     {
 694         appNameStr = wxTheApp->GetAppName();
 695         appName = WXSTRINGCAST appNameStr;
 696         wxLogMessage(wxT("----- Memory dump of %s at %s -----"), appName, WXSTRINGCAST wxNow() );
 697     }
 698     else
 699     {
 700       wxLogMessage( wxT("----- Memory dump -----") );
 701     }
 702   }
 703   TraverseList ((PmSFV)&wxMemStruct::Dump, (checkPoint ? checkPoint->m_next : (wxMemStruct*)NULL));
 704
 705   wxLogMessage( wxT("") );
 706   wxLogMessage( wxT("") );
 707
 708   return TRUE;
 709 #else
 710   return FALSE;
 711 #endif
 712 }
 713
 714 struct wxDebugStatsStruct
 715 {
 716   long instanceCount;
 717   long totalSize;
 718   wxChar *instanceClass;
 719   wxDebugStatsStruct *next;
 720 };
 721
 722 static wxDebugStatsStruct *FindStatsStruct(wxDebugStatsStruct *st, wxChar *name)
 723 {
 724   while (st)
 725   {
 726     if (wxStrcmp(st->instanceClass, name) == 0)
 727       return st;
 728     st = st->next;
 729   }
 730   return NULL;
 731 }
 732
 733 static wxDebugStatsStruct *InsertStatsStruct(wxDebugStatsStruct *head, wxDebugStatsStruct *st)
 734 {
 735   st->next = head;
 736   return st;
 737 }
 738
 739 bool wxDebugContext::PrintStatistics(bool detailed)
 740 {
 741 #ifdef __WXDEBUG__
 742 //  if (!HasStream())
 743 //    return FALSE;
 744
 745 //  if (TRUE)
 746   {
 747     wxChar* appName = wxT("application");
 748     wxString appNameStr(wxT(""));
 749     if (wxTheApp)
 750     {
 751         appNameStr = wxTheApp->GetAppName();
 752         appName = WXSTRINGCAST appNameStr;
 753         wxLogMessage(wxT("----- Memory statistics of %s at %s -----"), appName, WXSTRINGCAST wxNow() );
 754     }
 755     else
 756     {
 757       wxLogMessage( wxT("----- Memory statistics -----") );
 758     }
 759   }
 760
 761   bool currentMode = GetDebugMode();
 762   SetDebugMode(FALSE);
 763
 764   long noNonObjectNodes = 0;
 765   long noObjectNodes = 0;
 766   long totalSize = 0;
 767
 768   wxDebugStatsStruct *list = NULL;
 769
 770   wxMemStruct *from = (checkPoint ? checkPoint->m_next : (wxMemStruct*)NULL );
 771   if (!from)
 772     from = wxDebugContext::GetHead ();
 773
 774   wxMemStruct *st;
 775   for (st = from; st != 0; st = st->m_next)
 776   {
 777     void* data = st->GetActualData();
 778 //    if (detailed && (data != (void*)m_debugStream) && (data != (void*) m_streamBuf))
 779       if (detailed && (data != (void*) wxLog::GetActiveTarget()))
 780     {
 781       wxChar *className = wxT("nonobject");
 782       if (st->m_isObject && st->GetActualData())
 783       {
 784         wxObject *obj = (wxObject *)st->GetActualData();
 785         if (obj->GetClassInfo()->GetClassName())
 786           className = (wxChar*)obj->GetClassInfo()->GetClassName();
 787       }
 788       wxDebugStatsStruct *stats = FindStatsStruct(list, className);
 789       if (!stats)
 790       {
 791         stats = (wxDebugStatsStruct *)malloc(sizeof(wxDebugStatsStruct));
 792         stats->instanceClass = className;
 793         stats->instanceCount = 0;
 794         stats->totalSize = 0;
 795         list = InsertStatsStruct(list, stats);
 796       }
 797       stats->instanceCount ++;
 798       stats->totalSize += st->RequestSize();
 799     }
 800
 801 //    if ((data != (void*)m_debugStream) && (data != (void*) m_streamBuf))
 802     if (data != (void*) wxLog::GetActiveTarget())
 803     {
 804         totalSize += st->RequestSize();
 805         if (st->m_isObject)
 806             noObjectNodes ++;
 807         else
 808             noNonObjectNodes ++;
 809     }
 810   }
 811
 812   if (detailed)
 813   {
 814     while (list)
 815     {
 816       wxLogMessage(wxT("%ld objects of class %s, total size %ld"),
 817           list->instanceCount, list->instanceClass, list->totalSize);
 818       wxDebugStatsStruct *old = list;
 819       list = old->next;
 820       free((char *)old);
 821     }
 822     wxLogMessage(wxT(""));
 823   }
 824
 825   SetDebugMode(currentMode);
 826
 827   wxLogMessage(wxT("Number of object items: %ld"), noObjectNodes);
 828   wxLogMessage(wxT("Number of non-object items: %ld"), noNonObjectNodes);
 829   wxLogMessage(wxT("Total allocated size: %ld"), totalSize);
 830   wxLogMessage(wxT(""));
 831   wxLogMessage(wxT(""));
 832
 833   return TRUE;
 834 #else
 835   return FALSE;
 836 #endif
 837 }
 838
 839 bool wxDebugContext::PrintClasses(void)
 840 {
 841 //  if (!HasStream())
 842 //    return FALSE;
 843
 844 //  if (TRUE)
 845   {
 846     wxChar* appName = wxT("application");
 847     wxString appNameStr(wxT(""));
 848     if (wxTheApp)
 849     {
 850         appNameStr = wxTheApp->GetAppName();
 851         appName = WXSTRINGCAST appNameStr;
 852         wxLogMessage(wxT("----- Classes in %s -----"), appName);
 853     }
 854   }
 855
 856   int n = 0;
 857   wxNode *node;
 858   wxClassInfo *info;
 859
 860   wxClassInfo::sm_classTable->BeginFind();
 861   node = wxClassInfo::sm_classTable->Next();
 862   while (node)
 863   {
 864     info = (wxClassInfo *)node->Data();
 865     if (info->GetClassName())
 866     {
 867         wxString msg(info->GetClassName());
 868         msg += wxT(" ");
 869
 870         if (info->GetBaseClassName1() && !info->GetBaseClassName2())
 871         {
 872             msg += wxT("is a ");
 873             msg += info->GetBaseClassName1();
 874         }
 875         else if (info->GetBaseClassName1() && info->GetBaseClassName2())
 876         {
 877             msg += wxT("is a ");
 878             msg += info->GetBaseClassName1() ;
 879             msg += wxT(", ");
 880             msg += info->GetBaseClassName2() ;
 881         }
 882         if (info->GetConstructor())
 883             msg += wxT(": dynamic");
 884
 885         wxLogMessage(msg);
 886     }
 887     node = wxClassInfo::sm_classTable->Next();
 888     n ++;
 889   }
 890   wxLogMessage(wxT(""));
 891   wxLogMessage(wxT("There are %d classes derived from wxObject."), n);
 892   wxLogMessage(wxT(""));
 893   wxLogMessage(wxT(""));
 894   return TRUE;
 895 }
 896
 897 void wxDebugContext::SetCheckpoint(bool all)
 898 {
 899   if (all)
 900     checkPoint = NULL;
 901   else
 902     checkPoint = m_tail;
 903 }
 904
 905 // Checks all nodes since checkpoint, or since start.
 906 int wxDebugContext::Check(bool checkAll)
 907 {
 908   int nFailures = 0;
 909
 910   wxMemStruct *from = (checkPoint ? checkPoint->m_next : (wxMemStruct*)NULL );
 911   if (!from || checkAll)
 912     from = wxDebugContext::GetHead ();
 913
 914   for (wxMemStruct * st = from; st != 0; st = st->m_next)
 915   {
 916     if (st->AssertIt ())
 917       nFailures += st->CheckBlock ();
 918     else
 919       return -1;
 920   }
 921
 922   return nFailures;
 923 }
 924
 925 // Count the number of non-wxDebugContext-related objects
 926 // that are outstanding
 927 int wxDebugContext::CountObjectsLeft(bool sinceCheckpoint)
 928 {
 929   int n = 0;
 930
 931   wxMemStruct *from = NULL;
 932   if (sinceCheckpoint && checkPoint)
 933     from = checkPoint->m_next;
 934   else
 935     from = wxDebugContext::GetHead () ;
 936
 937   for (wxMemStruct * st = from; st != 0; st = st->m_next)
 938   {
 939       void* data = st->GetActualData();
 940 //      if ((data != (void*)m_debugStream) && (data != (void*) m_streamBuf))
 941       if (data != (void*) wxLog::GetActiveTarget())
 942           n ++;
 943   }
 944
 945   return n ;
 946 }
 947
 948 // TODO: store whether this is a vector or not.
 949 void * wxDebugAlloc(size_t size, wxChar * fileName, int lineNum, bool isObject, bool WXUNUSED(isVect) )
 950 {
 951   // If not in debugging allocation mode, do the normal thing
 952   // so we don't leave any trace of ourselves in the node list.
 953
 954 #if defined(__VISAGECPP__) && (__IBMCPP__ < 400 || __IBMC__ < 400 )
 955 // VA 3.0 still has trouble in here
 956   return (void *)malloc(size);
 957 #endif
 958   if (!wxDebugContext::GetDebugMode())
 959   {
 960     return (void *)malloc(size);
 961   }
 962
 963     int totSize = wxDebugContext::TotSize (size);
 964     char * buf = (char *) malloc(totSize);
 965     if (!buf) {
 966         wxLogMessage(wxT("Call to malloc (%ld) failed."), (long)size);
 967         return 0;
 968     }
 969     wxMemStruct * st = (wxMemStruct *)buf;
 970     st->m_firstMarker = MemStartCheck;
 971     st->m_reqSize = size;
 972     st->m_fileName = fileName;
 973     st->m_lineNum = lineNum;
 974     st->m_id = MemStructId;
 975     st->m_prev = 0;
 976     st->m_next = 0;
 977     st->m_isObject = isObject;
 978
 979     // Errors from Append() shouldn't really happen - but just in case!
 980     if (st->Append () == 0) {
 981         st->ErrorMsg ("Trying to append new node");
 982     }
 983
 984     if (wxDebugContext::GetCheckPrevious ()) {
 985         if (st->CheckAllPrevious () < 0) {
 986             st->ErrorMsg ("Checking previous nodes");
 987         }
 988     }
 989
 990     // Set up the extra markers at the middle and end.
 991     char * ptr = wxDebugContext::MidMarkerPos (buf);
 992     * (wxMarkerType *) ptr = MemMidCheck;
 993     ptr = wxDebugContext::EndMarkerPos (buf, size);
 994     * (wxMarkerType *) ptr = MemEndCheck;
 995
 996     // pointer returned points to the start of the caller's
 997     // usable area.
 998     void *m_actualData = (void *) wxDebugContext::CallerMemPos (buf);
 999     st->m_actualData = m_actualData;
1000
1001     return m_actualData;
1002 }
1003
1004 // TODO: check whether was allocated as a vector
1005 void wxDebugFree(void * buf, bool WXUNUSED(isVect) )
1006 {
1007   if (!buf)
1008     return;
1009
1010 #if defined(__VISAGECPP__) && (__IBMCPP__ < 400 || __IBMC__ < 400 )
1011 // VA 3.0 still has trouble in here
1012   free((char *)buf);
1013 #endif
1014   // If not in debugging allocation mode, do the normal thing
1015   // so we don't leave any trace of ourselves in the node list.
1016   if (!wxDebugContext::GetDebugMode())
1017   {
1018     free((char *)buf);
1019     return;
1020   }
1021
1022     // Points to the start of the entire allocated area.
1023     char * startPointer = wxDebugContext::StartPos ((char *) buf);
1024     // Find the struct and make sure that it's identifiable.
1025     wxMemStruct * st = (wxMemStruct *) wxDebugContext::StructPos (startPointer);
1026
1027     if (! st->ValidateNode ())
1028         return;
1029
1030     // If this is the current checkpoint, we need to
1031     // move the checkpoint back so it points to a valid
1032     // node.
1033     if (st == wxDebugContext::checkPoint)
1034       wxDebugContext::checkPoint = wxDebugContext::checkPoint->m_prev;
1035
1036     if (! st->Unlink ())
1037     {
1038       st->ErrorMsg ("Unlinking deleted node");
1039     }
1040
1041     // Now put in the fill char into the id slot and the caller requested
1042     // memory locations.
1043     st->SetDeleted ();
1044     (void) memset (wxDebugContext::CallerMemPos (startPointer), MemFillChar,
1045                    st->RequestSize ());
1046
1047     // Don't allow delayed freeing of memory in this version
1048 //    if (!wxDebugContext::GetDelayFree())
1049 //    free((void *)st);
1050     free((char *)st);
1051 }
1052
1053 // Trace: send output to the current debugging stream
1054 void wxTrace(const wxChar *fmt ...)
1055 {
1056 #if 1
1057     wxFAIL_MSG(wxT("wxTrace is now obsolete. Please use wxDebugXXX instead."));
1058 #else
1059     va_list ap;
1060   static wxChar buffer[512];
1061
1062   va_start(ap, fmt);
1063
1064 #ifdef __WXMSW__
1065   wvsprintf(buffer,fmt,ap) ;
1066 #else
1067   vsprintf(buffer,fmt,ap) ;
1068 #endif
1069
1070   va_end(ap);
1071
1072   if (wxDebugContext::HasStream())
1073   {
1074     wxDebugContext::GetStream() << buffer;
1075     wxDebugContext::GetStream().flush();
1076   }
1077   else
1078 #ifdef __WXMSW__
1079 #ifdef __WIN32__
1080     OutputDebugString((LPCTSTR)buffer) ;
1081 #else
1082     OutputDebugString((const char*) buffer) ;
1083 #endif
1084 #else
1085     fprintf(stderr, buffer);
1086 #endif
1087 #endif
1088 }
1089
1090 // Trace with level
1091 void wxTraceLevel(int level, const wxChar *fmt ...)
1092 {
1093 #if 1
1094     wxFAIL_MSG(wxT("wxTrace is now obsolete. Please use wxDebugXXX instead."));
1095 #else
1096   if (wxDebugContext::GetLevel() < level)
1097     return;
1098
1099   va_list ap;
1100   static wxChar buffer[512];
1101
1102   va_start(ap, fmt);
1103
1104 #ifdef __WXMSW__
1105   wxWvsprintf(buffer,fmt,ap) ;
1106 #else
1107   vsprintf(buffer,fmt,ap) ;
1108 #endif
1109
1110   va_end(ap);
1111
1112   if (wxDebugContext::HasStream())
1113   {
1114     wxDebugContext::GetStream() << buffer;
1115     wxDebugContext::GetStream().flush();
1116   }
1117   else
1118 #ifdef __WXMSW__
1119 #ifdef __WIN32__
1120     OutputDebugString((LPCTSTR)buffer) ;
1121 #else
1122     OutputDebugString((const char*) buffer) ;
1123 #endif
1124 #else
1125     fprintf(stderr, buffer);
1126 #endif
1127 #endif
1128 }
1129
1130 #else // wxUSE_MEMORY_TRACING && defined(__WXDEBUG__)
1131 void wxTrace(const char *WXUNUSED(fmt) ...)
1132 {
1133 }
1134
1135 void wxTraceLevel(int WXUNUSED(level), const char *WXUNUSED(fmt) ...)
1136 {
1137 }
1138 #endif
1139