On Tue, 19 Sep 2006, Graeme Geldenhuys wrote:
So what is wrong with this code then... When I quit the app, it says
I have one memory leak. What am I not freeing?
Try putting everyting in a procedure 'Test' and run that.
Global variables (even temporary ones) may not yet have been deallocated
when the debugger output is written. By putting everything in a procedure,
you force deallocation of all used variables, implicit or not.
Michael.
---------------------------------------------
program memleak;
{$mode objfpc}{$H+}
uses
{$IFDEF UNIX}{$IFDEF UseCThreads}
cthreads,
{$ENDIF}{$ENDIF}
Classes, SysUtils;
type
TMyObject = class(TObject)
private
FAge: integer;
FName: string;
public
property Name: string read FName write FName;
property Age: integer read FAge write FAge;
end;
var
lObj: TMyObject;
begin
lObj := TMyObject.Create;
try
lObj.Name := 'Graeme';
lObj.Age := 123;
Writeln('Hello ' + lObj.Name + ', you are ' + IntToStr(lObj.Age) +
' years old.');
finally
lObj.Free;
end;
end.
---------------------------------------------
The output:
---------------------------------------------
[graemeg-linux] memoryleakdetection > ./memleak
Hello Graeme, you are 123 years old.
Heap dump by heaptrc unit
24 memory blocks allocated : 471/520
23 memory blocks freed : 431/480
1 unfreed memory blocks : 40
True heap size : 393216 (32 used in System startup)
True free heap : 393072
Should be : 393088
Call trace for block $B7EB61B0 size 40
$08070E6D
$080480AB
---------------------------------------------
Compiler options: -S2cgi -OG1 -gl -gh -vewnhi -l -Fu. -omemleak
Regards,
- Graeme -
On 19/09/06, Michael Van Canneyt <[EMAIL PROTECTED]> wrote:
Just add -gh to the compiler command-line.
Run your project from a console, so you can see standard output.
When the program is finished, it will give you a detailed list of memory
leaks.
Michael.
--
There's no place like 127.0.0.1
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