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lazarus/components/codetools/memcheck.pas
lazarus ad15b496f4 MG: fixed mem leak in TComboBox 
git-svn-id: trunk@3358 -
2002-09-16 17:34:37 +00:00

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{
***************************************************************************
* *
* This unit is an altered heaptrc.pp from the fpc sources *
* *
***************************************************************************
}
{
$Id$
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by the Free Pascal development team.
Heap tracer
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
unit MemCheck;
{$goto on}
interface
Procedure DumpHeap;
Procedure MarkHeap;
{ define EXTRA to add more
tests :
- keep all memory after release and
check by CRC value if not changed after release
WARNING this needs extremely much memory (PM) }
type
FillExtraInfoType = procedure(p : pointer);
{ allows to add several longint value that can help
to debug :
see for instance ppheap.pas unit of the compiler source PM }
Procedure SetExtraInfo( size : longint;func : FillExtraInfoType);
Procedure SetHeapTraceOutput(const name : string);
const
{ tracing level
splitted in two if memory is released !! }
{$ifdef EXTRA}
tracesize = 16;
{$else EXTRA}
tracesize = 32;
{$endif EXTRA}
quicktrace : boolean=true;
{ calls halt() on error by default !! }
HaltOnError : boolean = true;
{ set this to true if you suspect that memory
is freed several times }
{$ifdef EXTRA}
keepreleased : boolean=true;
add_tail : boolean = true;
{$else EXTRA}
keepreleased : boolean=false;
add_tail : boolean = false;
{$endif EXTRA}
{ put crc in sig
this allows to test for writing into that part }
usecrc : boolean = true;
// StartAddition for CodeTools
procedure CheckHeap;
procedure CheckHeap(const txt: ansistring);
procedure CheckHeapWrtMemCnt(const txt: ansistring);
function MemCheck_getmem_cnt: longint;
function MemCheck_freemem_cnt: longint;
function MemCheck_getmem_size: longint;
function MemCheck_freemem_size: longint;
function MemCheck_getmem8_size: longint;
function MemCheck_freemem8_size: longint;
// Addition for CodeTools
implementation
type
plongint = ^longint;
const
{ allows to add custom info in heap_mem_info }
extra_info_size : longint = 0;
exact_info_size : longint = 0;
EntryMemUsed : longint = 0;
{ function to fill this info up }
fill_extra_info : FillExtraInfoType = nil;
error_in_heap : boolean = false;
inside_trace_getmem : boolean = false;
type
pheap_mem_info = ^theap_mem_info;
{ warning the size of theap_mem_info
must be a multiple of 8
because otherwise you will get
problems when releasing the usual memory part !!
sizeof(theap_mem_info = 16+tracesize*4 so
tracesize must be even !! PM }
theap_mem_info = record
previous,
next : pheap_mem_info;
size : longint;
sig : longint;
{$ifdef EXTRA}
release_sig : longint;
prev_valid : pheap_mem_info;
{$endif EXTRA}
calls : array [1..tracesize] of longint;
extra_info : record
end;
end;
var
ptext : ^text;
ownfile : text;
{$ifdef EXTRA}
error_file : text;
heap_valid_first,
heap_valid_last : pheap_mem_info;
{$endif EXTRA}
heap_mem_root : pheap_mem_info;
getmem_cnt,
freemem_cnt : longint;
getmem_size,
freemem_size : longint;
getmem8_size,
freemem8_size : longint;
// StartAddition for CodeTools
procedure CheckHeap;
var p: pointer;
begin
writeln('>>> memcheck.pp - CheckHeap');
QuickTrace:=false;
GetMem(p,4);
FreeMem(p);
QuickTrace:=true;
end;
procedure CheckHeap(const txt: ansistring);
var p: pointer;
begin
writeln('>>> memcheck.pp - CheckHeap "',txt,'"');
QuickTrace:=false;
GetMem(p,4);
FreeMem(p);
QuickTrace:=true;
end;
const
LastWrittenGetMemCnt: longint = 0;
HiddenGetMemCnt: longint = 0;
procedure CheckHeapWrtMemCnt(const txt: ansistring);
var
p: pointer;
StartGetMemCnt, CurGetMemCount, DiffGetMemCount: longint;
begin
StartGetMemCnt:=MemCheck_getmem_cnt;
CurGetMemCount:=StartGetMemCnt-HiddenGetMemCnt;
DiffGetMemCount:=CurGetMemCount-LastWrittenGetMemCnt;
LastWrittenGetMemCnt:=CurGetMemCount;
writeln('>>> memcheck.pp - CheckHeap2 "',txt,'" ',
CurGetMemCount,'(',StartGetMemCnt,') +',DiffGetMemCount);
QuickTrace:=false;
GetMem(p,4);
FreeMem(p);
QuickTrace:=true;
// don't count mem counts of this proc
inc(HiddenGetMemCnt,MemCheck_getmem_cnt-StartGetMemCnt);
end;
function MemCheck_getmem_cnt: longint;
begin
MemCheck_getmem_cnt:=getmem_cnt;
end;
function MemCheck_freemem_cnt: longint;
begin
MemCheck_freemem_cnt:=freemem_cnt;
end;
function MemCheck_getmem_size: longint;
begin
MemCheck_getmem_size:=getmem_size;
end;
function MemCheck_freemem_size: longint;
begin
MemCheck_freemem_size:=freemem_size;
end;
function MemCheck_getmem8_size: longint;
begin
MemCheck_getmem8_size:=getmem8_size;
end;
function MemCheck_freemem8_size: longint;
begin
MemCheck_freemem8_size:=freemem8_size;
end;
// Addition for CodeTools
{*****************************************************************************
Crc 32
*****************************************************************************}
var
{$ifdef Delphi}
Crc32Tbl : array[0..255] of longword;
{$else Delphi}
Crc32Tbl : array[0..255] of longint;
{$endif Delphi}
procedure MakeCRC32Tbl;
var
{$ifdef Delphi}
crc : longword;
{$else Delphi}
crc : longint;
{$endif Delphi}
i,n : byte;
begin
for i:=0 to 255 do
begin
crc:=i;
for n:=1 to 8 do
if odd(crc) then
crc:=(crc shr 1) xor $edb88320
else
crc:=crc shr 1;
Crc32Tbl[i]:=crc;
end;
end;
{$ifopt R+}
{$define Range_check_on}
{$endif opt R+}
{$R- needed here }
Function UpdateCrc32(InitCrc:longint;var InBuf;InLen:Longint):longint;
var
i : longint;
p : pchar;
begin
p:=@InBuf;
for i:=1 to InLen do
begin
InitCrc:=Crc32Tbl[byte(InitCrc) xor byte(p^)] xor (InitCrc shr 8);
inc(longint(p));
end;
UpdateCrc32:=InitCrc;
end;
Function calculate_sig(p : pheap_mem_info) : longint;
var
crc : longint;
pl : plongint;
begin
crc:=$ffffffff;
crc:=UpdateCrc32(crc,p^.size,sizeof(longint));
crc:=UpdateCrc32(crc,p^.calls,tracesize*sizeof(longint));
if extra_info_size>0 then
crc:=UpdateCrc32(crc,p^.extra_info,exact_info_size);
if add_tail then
begin
{ Check also 4 bytes just after allocation !! }
pl:=pointer(p)+extra_info_size+sizeof(theap_mem_info)+p^.size;
crc:=UpdateCrc32(crc,pl^,sizeof(longint));
end;
calculate_sig:=crc;
end;
{$ifdef EXTRA}
Function calculate_release_sig(p : pheap_mem_info) : longint;
var
crc : longint;
pl : plongint;
begin
crc:=$ffffffff;
crc:=UpdateCrc32(crc,p^.size,sizeof(longint));
crc:=UpdateCrc32(crc,p^.calls,tracesize*sizeof(longint));
if extra_info_size>0 then
crc:=UpdateCrc32(crc,p^.extra_info,exact_info_size);
{ Check the whole of the whole allocation }
pl:=pointer(p)+extra_info_size+sizeof(theap_mem_info);
crc:=UpdateCrc32(crc,pl^,p^.size);
{ Check also 4 bytes just after allocation !! }
if add_tail then
begin
{ Check also 4 bytes just after allocation !! }
pl:=pointer(p)+extra_info_size+sizeof(theap_mem_info)+p^.size;
crc:=UpdateCrc32(crc,pl^,sizeof(longint));
end;
calculate_release_sig:=crc;
end;
{$endif EXTRA}
{$ifdef Range_check_on}
{$R+}
{$undef Range_check_on}
{$endif Range_check_on}
{*****************************************************************************
Helpers
*****************************************************************************}
procedure call_stack(pp : pheap_mem_info;var ptext : text);
var
i : longint;
begin
writeln(ptext,'Call trace for block 0x',hexstr(longint(pointer(pp)+sizeof(theap_mem_info)),8),' size ',pp^.size);
for i:=1 to tracesize do
if pp^.calls[i]<>0 then
writeln(ptext,BackTraceStrFunc(pp^.calls[i]));
for i:=0 to (exact_info_size div 4)-1 do
writeln(ptext,'info ',i,'=',plongint(pointer(@pp^.extra_info)+4*i)^);
end;
procedure call_free_stack(pp : pheap_mem_info;var ptext : text);
var
i : longint;
begin
writeln(ptext,'Call trace for block at 0x',hexstr(longint(pointer(pp)+sizeof(theap_mem_info)),8),' size ',pp^.size);
for i:=1 to tracesize div 2 do
if pp^.calls[i]<>0 then
writeln(ptext,BackTraceStrFunc(pp^.calls[i]));
writeln(ptext,' was released at ');
for i:=(tracesize div 2)+1 to tracesize do
if pp^.calls[i]<>0 then
writeln(ptext,BackTraceStrFunc(pp^.calls[i]));
for i:=0 to (exact_info_size div 4)-1 do
writeln(ptext,'info ',i,'=',plongint(pointer(@pp^.extra_info)+4*i)^);
end;
procedure dump_already_free(p : pheap_mem_info;var ptext : text);
begin
Writeln(ptext,'Marked memory at 0x',HexStr(longint(pointer(p)+sizeof(theap_mem_info)),8),' released');
call_free_stack(p,ptext);
Writeln(ptext,'freed again at');
dump_stack(ptext,get_caller_frame(get_frame));
end;
procedure dump_error(p : pheap_mem_info;var ptext : text);
begin
Writeln(ptext,'Marked memory at 0x',HexStr(longint(pointer(p)+sizeof(theap_mem_info)),8),' invalid');
Writeln(ptext,'Wrong signature $',hexstr(p^.sig,8)
,' instead of ',hexstr(calculate_sig(p),8));
dump_stack(ptext,get_caller_frame(get_frame));
end;
{$ifdef EXTRA}
procedure dump_change_after(p : pheap_mem_info;var ptext : text);
var pp : pchar;
i : longint;
begin
Writeln(ptext,'Marked memory at 0x',HexStr(longint(pointer(p)+sizeof(theap_mem_info)),8),' invalid');
Writeln(ptext,'Wrong release CRC $',hexstr(p^.release_sig,8)
,' instead of ',hexstr(calculate_release_sig(p),8));
Writeln(ptext,'This memory was changed after call to freemem !');
call_free_stack(p,ptext);
pp:=pointer(p)+sizeof(theap_mem_info)+extra_info_size;
for i:=0 to p^.size-1 do
if byte(pp[i])<>$F0 then
Writeln(ptext,'offset',i,':$',hexstr(i,8),'"',pp[i],'"');
end;
{$endif EXTRA}
procedure dump_wrong_size(p : pheap_mem_info;size : longint;var ptext : text);
var
i : longint;
begin
Writeln(ptext,'Marked memory at 0x',HexStr(longint(pointer(p)+sizeof(theap_mem_info)),8),' invalid');
Writeln(ptext,'Wrong size : ',p^.size,' allocated ',size,' freed');
dump_stack(ptext,get_caller_frame(get_frame));
for i:=0 to (exact_info_size div 4)-1 do
writeln(ptext,'info ',i,'=',plongint(@p^.extra_info+4*i)^);
call_stack(p,ptext);
end;
function is_in_getmem_list (p : pheap_mem_info) : boolean;
var
i : longint;
pp : pheap_mem_info;
begin
is_in_getmem_list:=false;
pp:=heap_mem_root;
i:=0;
while pp<>nil do
begin
if ((pp^.sig<>$DEADBEEF) or usecrc) and
((pp^.sig<>calculate_sig(pp)) or not usecrc) and
(pp^.sig <> $AAAAAAAA) then
begin
writeln(ptext^,'error in linked list of heap_mem_info');
RunError(204);
end;
if pp=p then
is_in_getmem_list:=true;
pp:=pp^.previous;
inc(i);
if i>getmem_cnt-freemem_cnt then
writeln(ptext^,'error in linked list of heap_mem_info');
end;
end;
{*****************************************************************************
TraceGetMem
*****************************************************************************}
Function TraceGetMem(size:longint):pointer;
var
i,bp : longint;
pl : plongint;
p : pointer;
begin
inc(getmem_size,size);
inc(getmem8_size,((size+7) div 8)*8);
{ Do the real GetMem, but alloc also for the info block }
bp:=size+sizeof(theap_mem_info)+extra_info_size;
if add_tail then
inc(bp,sizeof(longint));
p:=SysGetMem(bp);
{ Create the info block }
pheap_mem_info(p)^.sig:=$DEADBEEF;
pheap_mem_info(p)^.size:=size;
if add_tail then
begin
pl:=pointer(p)+bp-sizeof(longint);
pl^:=$DEADBEEF;
end;
bp:=get_caller_frame(get_frame);
for i:=1 to tracesize do
begin
pheap_mem_info(p)^.calls[i]:=get_caller_addr(bp);
bp:=get_caller_frame(bp);
end;
{ insert in the linked list }
if heap_mem_root<>nil then
heap_mem_root^.next:=pheap_mem_info(p);
pheap_mem_info(p)^.previous:=heap_mem_root;
pheap_mem_info(p)^.next:=nil;
{$ifdef EXTRA}
pheap_mem_info(p)^.prev_valid:=heap_valid_last;
heap_valid_last:=pheap_mem_info(p);
if not assigned(heap_valid_first) then
heap_valid_first:=pheap_mem_info(p);
{$endif EXTRA}
heap_mem_root:=p;
{ must be changed before fill_extra_info is called
because checkpointer can be called from within
fill_extra_info PM }
inc(getmem_cnt);
if assigned(fill_extra_info) then
begin
inside_trace_getmem:=true;
fill_extra_info(@pheap_mem_info(p)^.extra_info);
inside_trace_getmem:=false;
end;
{ update the pointer }
if usecrc then
pheap_mem_info(p)^.sig:=calculate_sig(pheap_mem_info(p));
inc(p,sizeof(theap_mem_info)+extra_info_size);
TraceGetmem:=p;
end;
{*****************************************************************************
TraceFreeMem
*****************************************************************************}
function TraceFreeMemSize(var p:pointer;size:longint):longint;
var
i,bp, ppsize : longint;
pp : pheap_mem_info;
{$ifdef EXTRA}
pp2 : pheap_mem_info;
{$endif}
begin
inc(freemem_size,size);
inc(freemem8_size,((size+7) div 8)*8);
ppsize:= size + sizeof(theap_mem_info)+extra_info_size;
if add_tail then
ppsize:=ppsize+sizeof(longint);
dec(p,sizeof(theap_mem_info)+extra_info_size);
pp:=pheap_mem_info(p);
if not quicktrace and not(is_in_getmem_list(pp)) then
RunError(204);
if (pp^.sig=$AAAAAAAA) and not usecrc then
begin
error_in_heap:=true;
dump_already_free(pp,ptext^);
if haltonerror then halt(1);
end
else if ((pp^.sig<>$DEADBEEF) or usecrc) and
((pp^.sig<>calculate_sig(pp)) or not usecrc) then
begin
error_in_heap:=true;
dump_error(pp,ptext^);
{$ifdef EXTRA}
dump_error(pp,error_file);
{$endif EXTRA}
{ don't release anything in this case !! }
if haltonerror then halt(1);
exit;
end
else if pp^.size<>size then
begin
error_in_heap:=true;
dump_wrong_size(pp,size,ptext^);
{$ifdef EXTRA}
dump_wrong_size(pp,size,error_file);
{$endif EXTRA}
if haltonerror then halt(1);
{ don't release anything in this case !! }
exit;
end;
{ now it is released !! }
pp^.sig:=$AAAAAAAA;
if not keepreleased then
begin
if pp^.next<>nil then
pp^.next^.previous:=pp^.previous;
if pp^.previous<>nil then
pp^.previous^.next:=pp^.next;
if pp=heap_mem_root then
heap_mem_root:=heap_mem_root^.previous;
end
else
begin
bp:=get_caller_frame(get_frame);
for i:=(tracesize div 2)+1 to tracesize do
begin
pp^.calls[i]:=get_caller_addr(bp);
bp:=get_caller_frame(bp);
end;
end;
inc(freemem_cnt);
{ release the normal memory at least !! }
{ this way we keep all info about all released memory !! }
if keepreleased then
begin
{$ifndef EXTRA}
dec(ppsize,sizeof(theap_mem_info)+extra_info_size);
inc(p,sizeof(theap_mem_info)+extra_info_size);
{$else EXTRA}
inc(p,sizeof(theap_mem_info)+extra_info_size);
fillchar(p^,size,#240); { $F0 will lead to GFP if used as pointer ! }
{ We want to check if the memory was changed after release !! }
pp^.release_sig:=calculate_release_sig(pp);
if pp=heap_valid_last then
begin
heap_valid_last:=pp^.prev_valid;
if pp=heap_valid_first then
heap_valid_first:=nil;
exit;
end;
pp2:=heap_valid_last;
while assigned(pp2) do
begin
if pp2^.prev_valid=pp then
begin
pp2^.prev_valid:=pp^.prev_valid;
if pp=heap_valid_first then
heap_valid_first:=pp2;
exit;
end
else
pp2:=pp2^.prev_valid;
end;
exit;
{$endif EXTRA}
end;
i:=SysFreeMemSize(p,ppsize);
dec(i,sizeof(theap_mem_info)+extra_info_size);
if add_tail then
dec(i,sizeof(longint));
TraceFreeMemSize:=i;
end;
function TraceMemSize(p:pointer):Longint;
var
l : longint;
begin
l:=SysMemSize(p-(sizeof(theap_mem_info)+extra_info_size));
dec(l,sizeof(theap_mem_info)+extra_info_size);
if add_tail then
dec(l,sizeof(longint));
TraceMemSize:=l;
end;
function TraceFreeMem(var p:pointer):longint;
var
size : longint;
pp : pheap_mem_info;
begin
pp:=pheap_mem_info(pointer(p)-(sizeof(theap_mem_info)+extra_info_size));
size:=TraceMemSize(p);
{ this can never happend normaly }
if pp^.size>size then
begin
dump_wrong_size(pp,size,ptext^);
{$ifdef EXTRA}
dump_wrong_size(pp,size,error_file);
{$endif EXTRA}
end;
TraceFreeMem:=TraceFreeMemSize(p,pp^.size);
end;
{*****************************************************************************
ReAllocMem
*****************************************************************************}
function TraceReAllocMem(var p:pointer;size:longint):Pointer;
var
newP: pointer;
oldsize,
i,bp : longint;
pl : plongint;
pp : pheap_mem_info;
begin
{ Free block? }
if size=0 then
begin
if p<>nil then
TraceFreeMem(p);
TraceReallocMem:=P;
exit;
end;
{ Allocate a new block? }
if p=nil then
begin
p:=TraceGetMem(size);
TraceReallocMem:=P;
exit;
end;
{ Resize block }
dec(p,sizeof(theap_mem_info)+extra_info_size);
pp:=pheap_mem_info(p);
{ test block }
if ((pp^.sig<>$DEADBEEF) or usecrc) and
((pp^.sig<>calculate_sig(pp)) or not usecrc) then
begin
error_in_heap:=true;
dump_error(pp,ptext^);
{$ifdef EXTRA}
dump_error(pp,error_file);
{$endif EXTRA}
{ don't release anything in this case !! }
if haltonerror then halt(1);
exit;
end;
{ Do the real ReAllocMem, but alloc also for the info block }
bp:=size+sizeof(theap_mem_info)+extra_info_size;
if add_tail then
inc(bp,sizeof(longint));
{ the internal ReAllocMem is not allowed to move any data }
if not SysTryResizeMem(p,bp) then
begin
{ restore p }
inc(p,sizeof(theap_mem_info)+extra_info_size);
{ get a new block }
oldsize:=TraceMemSize(p);
newP := TraceGetMem(size);
{ move the data }
if newP <> nil then
move(p^,newP^,oldsize);
{ release p }
traceFreeMem(p);
p := newP;
traceReAllocMem := p;
exit;
end;
pp:=pheap_mem_info(p);
{ adjust like a freemem and then a getmem, so you get correct
results in the summary display }
inc(freemem_size,pp^.size);
inc(freemem8_size,((pp^.size+7) div 8)*8);
inc(getmem_size,size);
inc(getmem8_size,((size+7) div 8)*8);
{ Create the info block }
pp^.sig:=$DEADBEEF;
pp^.size:=size;
if add_tail then
begin
pl:=pointer(p)+bp-sizeof(longint);
pl^:=$DEADBEEF;
end;
bp:=get_caller_frame(get_frame);
for i:=1 to tracesize do
begin
pp^.calls[i]:=get_caller_addr(bp);
bp:=get_caller_frame(bp);
end;
if assigned(fill_extra_info) then
fill_extra_info(@pp^.extra_info);
{ update the pointer }
if usecrc then
pp^.sig:=calculate_sig(pp);
inc(p,sizeof(theap_mem_info)+extra_info_size);
TraceReAllocmem:=p;
end;
{***************************************************************************** Check pointer *****************************************************************************}
{$ifndef unix}
{$S-}
{$endif}
{$ifdef go32v2}
var
__stklen : cardinal;external name '__stklen';
__stkbottom : cardinal;external name '__stkbottom';
edata : cardinal; external name 'edata';
heap_at_init : pointer;
{$endif go32v2}
{$ifdef win32}
var
StartUpHeapEnd : pointer;
{ I found no symbol for start of text section :(
so we usee the _mainCRTStartup which should be
in wprt0.ow or wdllprt0.ow PM }
text_begin : cardinal;external name '_mainCRTStartup';
data_end : cardinal;external name '__data_end__';
{$endif}
{$ifdef unix}
const
global_stack_top : cardinal = 0;
procedure _start; cdecl; external;
{$endif unix}
procedure CheckPointer(p : pointer);[saveregisters,public, alias : 'FPC_CHECKPOINTER'];
var
i : longint;
pp : pheap_mem_info;
get_ebp,stack_top : cardinal;
data_end : cardinal;
label
_exit;
begin
if p=nil then
goto _exit;
i:=0;
{$ifdef go32v2}
if cardinal(p)<$1000 then
runerror(216);
asm
movl %ebp,get_ebp
leal edata,%eax
movl %eax,data_end
end;
stack_top:=__stkbottom+__stklen;
{ allow all between start of code and end of data }
if cardinal(p)<=data_end then
goto _exit;
{ .bss section }
if cardinal(p)<=cardinal(heap_at_init) then
goto _exit;
{ stack can be above heap !! }
if (cardinal(p)>=get_ebp) and (cardinal(p)<=stack_top) then
goto _exit;
{$endif go32v2}
{$ifdef unix}
if (cardinal(p)>=cardinal(@_start)) and
(cardinal(p)<=cardinal(heaporg)) then exit;
{$ifdef cpui386}
asm
movl %ebp, get_ebp
end;
{$endif cpui386}
{$ifdef cpu68k}
asm
move.l a6, get_ebp
end;
{$endif cpu86}
if cardinal (p) > cardinal (get_ebp) then
begin
if (global_stack_top = 0) then
begin
{$ifdef cpui386}
asm
movl %ebp,%eax
movl %eax,%ebx
.Lnext:
orl %eax,%eax
je .Ltopfound
movl (%eax),%eax
cmpl %eax,%ebx
jae .Ltopfound
movl %eax,%ebx
jmp .Lnext
.Ltopfound:
movl %ebx,global_stack_top
end;
{$endif cpui386}
{$ifdef cpu68k}
asm
move.l a6,d0
move.l d0,d1
@Lnext:
or.l d0,d0
beq @Ltopfound
move.l d0,a0
move.l (a0),d0
cmp.l a0,a1
bgt @Ltopfound
move.l a0,a1
bra @Lnext
@Ltopfound:
move.l a1,global_stack_top
end;
{$endif cpu86}
{ argv and argc are above this value :( }
global_stack_top := global_stack_top or $fffff;
end;
if cardinal(p) <= global_stack_top then
exit;
end;
{$endif unix}
{ I don't know where the stack is in other OS !! }
{$ifdef win32}
if (cardinal(p)>=$40000) and (p<=HeapOrg) then
goto _exit;
{ inside stack ? }
asm
movl %ebp,get_ebp
end;
if (cardinal(p)>get_ebp) and
(cardinal(p)<Win32StackTop) then
goto _exit;
{$endif win32}
if p>=heapptr then
runerror(216);
{ first try valid list faster }
{$ifdef EXTRA}
pp:=heap_valid_last;
while pp<>nil do
begin
{ inside this valid block ! }
{ we can be changing the extrainfo !! }
if (cardinal(p)>=cardinal(pp)+sizeof(theap_mem_info){+extra_info_size}) and
(cardinal(p)<=cardinal(pp)+sizeof(theap_mem_info)+extra_info_size+pp^.size) then
begin
{ check allocated block }
if ((pp^.sig=$DEADBEEF) and not usecrc) or
((pp^.sig=calculate_sig(pp)) and usecrc) or
{ special case of the fill_extra_info call }
((pp=heap_valid_last) and usecrc and (pp^.sig=$DEADBEEF)
and inside_trace_getmem) then
goto _exit
else
begin
writeln(ptext^,'corrupted heap_mem_info');
dump_error(pp,ptext^);
halt(1);
end;
end
else
pp:=pp^.prev_valid;
inc(i);
if i>getmem_cnt-freemem_cnt then
begin
writeln(ptext^,'error in linked list of heap_mem_info');
halt(1);
end;
end;
i:=0;
{$endif EXTRA}
pp:=heap_mem_root;
while pp<>nil do
begin
{ inside this block ! }
if (cardinal(p)>=cardinal(pp)+sizeof(theap_mem_info)+cardinal(extra_info_size)) and
(cardinal(p)<=cardinal(pp)+sizeof(theap_mem_info)+cardinal(extra_info_size)+cardinal(pp^.size)) then
{ allocated block }
if ((pp^.sig=$DEADBEEF) and not usecrc) or
((pp^.sig=calculate_sig(pp)) and usecrc) then
goto _exit
else
begin
writeln(ptext^,'pointer $',hexstr(longint(p),8),' points into invalid memory block');
dump_error(pp,ptext^);
runerror(204);
end;
pp:=pp^.previous;
inc(i);
if i>getmem_cnt then
begin
writeln(ptext^,'error in linked list of heap_mem_info');
halt(1);
end;
end;
writeln(ptext^,'pointer $',hexstr(longint(p),8),' does not point to valid memory block');
runerror(204);
_exit:
end;
{*****************************************************************************
Dump Heap
*****************************************************************************}
procedure dumpheap;
var
pp : pheap_mem_info;
i : longint;
ExpectedMemAvail : longint;
begin
pp:=heap_mem_root;
Writeln(ptext^,'Heap dump by heaptrc unit');
{$ifdef EXTRA}
Writeln(ptext^,'compiled with EXTRA features');
{$endif EXTRA}
Writeln(ptext^,getmem_cnt, ' memory blocks allocated : ',getmem_size,'/',getmem8_size);
Writeln(ptext^,freemem_cnt,' memory blocks freed : ',freemem_size,'/',freemem8_size);
Writeln(ptext^,getmem_cnt-freemem_cnt,' unfreed memory blocks : ',getmem_size-freemem_size);
Write(ptext^,'True heap size : ',system.HeapSize);
if EntryMemUsed > 0 then
Writeln(ptext^,' (',EntryMemUsed,' used in System startup)')
else
Writeln(ptext^);
Writeln(ptext^,'True free heap : ',MemAvail);
ExpectedMemAvail:=system.HeapSize-(getmem8_size-freemem8_size)-
(getmem_cnt-freemem_cnt)*(sizeof(theap_mem_info)+extra_info_size)-EntryMemUsed;
If ExpectedMemAvail<>MemAvail then
Writeln(ptext^,'Should be : ',ExpectedMemAvail);
i:=getmem_cnt-freemem_cnt;
while pp<>nil do
begin
if i<0 then
begin
Writeln(ptext^,'Error in heap memory list');
Writeln(ptext^,'More memory blocks than expected');
exit;
end;
if ((pp^.sig=$DEADBEEF) and not usecrc) or
((pp^.sig=calculate_sig(pp)) and usecrc) then
begin
{ this one was not released !! }
if exitcode<>203 then
call_stack(pp,ptext^);
dec(i);
end
else if pp^.sig<>$AAAAAAAA then
begin
dump_error(pp,ptext^);
{$ifdef EXTRA}
dump_error(pp,error_file);
{$endif EXTRA}
error_in_heap:=true;
end
{$ifdef EXTRA}
else if pp^.release_sig<>calculate_release_sig(pp) then
begin
dump_change_after(pp,ptext^);
dump_change_after(pp,error_file);
error_in_heap:=true;
end
{$endif EXTRA}
;
pp:=pp^.previous;
end;
end;
procedure markheap;
var
pp : pheap_mem_info;
begin
pp:=heap_mem_root;
while pp<>nil do
begin
pp^.sig:=$AAAAAAAA;
pp:=pp^.previous;
end;
end;
{*****************************************************************************
AllocMem
*****************************************************************************}
function TraceAllocMem(size:longint):Pointer;
begin
TraceAllocMem:=SysAllocMem(size);
end;
{*****************************************************************************
No specific tracing calls
*****************************************************************************}
function TraceMemAvail:longint;
begin
TraceMemAvail:=SysMemAvail;
end;
function TraceMaxAvail:longint;
begin
TraceMaxAvail:=SysMaxAvail;
end;
function TraceHeapSize:longint;
begin
TraceHeapSize:=SysHeapSize;
end;
{*****************************************************************************
Install MemoryManager
*****************************************************************************}
const
TraceManager:TMemoryManager=(
Getmem : @TraceGetMem;
Freemem : @TraceFreeMem;
FreememSize : @TraceFreeMemSize;
AllocMem : @TraceAllocMem;
ReAllocMem : @TraceReAllocMem;
MemSize : @TraceMemSize;
MemAvail : @TraceMemAvail;
MaxAvail : @TraceMaxAvail;
HeapSize : @TraceHeapsize;
);
procedure TraceExit;
begin
{ no dump if error
because this gives long long listings }
{ clear inoutres, in case the program that quit didn't }
ioresult;
if (exitcode<>0) and (erroraddr<>nil) then
begin
Writeln(ptext^,'No heap dump by heaptrc unit');
Writeln(ptext^,'Exitcode = ',exitcode);
if ptext<>@stderr then
begin
ptext:=@stderr;
close(ownfile);
end;
exit;
end;
if not error_in_heap then
Dumpheap;
if error_in_heap and (exitcode=0) then
exitcode:=203;
{$ifdef EXTRA}
Close(error_file);
{$endif EXTRA}
if ptext<>@stderr then
begin
ptext:=@stderr;
close(ownfile);
end;
end;
Procedure SetHeapTraceOutput(const name : string);
var i : longint;
begin
if ptext<>@stderr then
begin
ptext:=@stderr;
close(ownfile);
end;
assign(ownfile,name);
{$I-}
append(ownfile);
if IOResult<>0 then
Rewrite(ownfile);
{$I+}
ptext:=@ownfile;
for i:=0 to Paramcount do
write(ptext^,paramstr(i),' ');
writeln(ptext^);
end;
procedure SetExtraInfo( size : longint;func : fillextrainfotype);
begin
if getmem_cnt>0 then
begin
writeln(ptext^,'Setting extra info is only possible at start !! ');
dumpheap;
end
else
begin
{ the total size must stay multiple of 8 !! }
exact_info_size:=size;
extra_info_size:=((size+7) div 8)*8;
fill_extra_info:=func;
end;
end;
Initialization
EntryMemUsed:=System.HeapSize-MemAvail;
MakeCRC32Tbl;
SetMemoryManager(TraceManager);
ptext:=@stderr;
{$ifdef EXTRA}
Assign(error_file,'heap.err');
Rewrite(error_file);
{$endif EXTRA}
{ checkpointer init }
{$ifdef go32v2}
Heap_at_init:=HeapPtr;
{$endif}
{$ifdef win32}
StartupHeapEnd:=HeapEnd;
{$endif}
finalization
TraceExit;
end.
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