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Add information about MCB to SysAlloc call if DEBUG_TINY_HEAP macro is defined

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git-svn-id: trunk@36299 -
This commit is contained in:
pierre 2017-05-22 20:42:33 +00:00
parent e092f00843
commit 53bfafa290
1 changed files with 45 additions and 1 deletions
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46
rtl/msdos/sysheap.inc
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@ -20,10 +20,28 @@
Heap Management
*****************************************************************************}
{$ifdef DEBUG_TINY_HEAP}
{ Internal structure used by MSDOS }
type
MCB = packed record
sig : char;
psp : word;
paragraphs : word;
res : array [0..2] of char;
exename : array [0..7] of char;
end;
PMCB = ^MCB;
{$endif def DEBUG_TINY_HEAP}
function SysOSAlloc (size: ptruint): pointer;
var
regs : Registers;
nb_para : longint;
{$ifdef DEBUG_TINY_HEAP}
p : pmcb;
i : byte;
{$endif def DEBUG_TINY_HEAP}
begin
{$ifdef DEBUG_TINY_HEAP}
writeln('SysOSAlloc called size=',size);
@ -56,7 +74,33 @@ begin
begin
result:=ptr(regs.ax,0);
{$ifdef DEBUG_TINY_HEAP}
writeln('SysOSAlloc returned= $',hexstr(seg(regs.ax),4),':$0');
writeln('SysOSAlloc returned= $',hexstr(regs.ax,4),':$0');
p:=ptr(regs.ax-1,0);
writeln('Possibly prev MCB: at ',hexstr(p));
writeln(' sig=',p^.sig);
writeln(' psp=$',hexstr(p^.psp,4));
writeln(' paragraphs=',p^.paragraphs);
if (p^.exename[0]<>#0) then
begin
write(' name=');
for i:=0 to 7 do
if ord(p^.exename[i])>31 then
write(p^.exename[i]);
writeln;
end;
p:=ptr(regs.ax+p^.paragraphs,0);
writeln('Possibly next MCB: at ',hexstr(p));
writeln(' sig=',p^.sig);
writeln(' psp=$',hexstr(p^.psp,4));
writeln(' paragraphs=',p^.paragraphs);
if (p^.exename[0]<>#0) then
begin
write(' name=');
for i:=0 to 7 do
if ord(p^.exename[i])>31 then
write(p^.exename[i]);
writeln;
end;
{$endif}
end;
end;