[fpc-pascal] fpWeb: How can I use heaptrc in standalone mode?

[Marcos Douglas B. Santos]

On Sat, May 5, 2018 at 11:51 AM, Michael Van Canneyt
<michael at freepascal.org> wrote:
>
>
> On Sat, 5 May 2018, Marcos Douglas B. Santos wrote:
>
>> I'm using fpWeb in standalone mode (fphttpapp unit) to develop and debug.
>> I would like to see the heaptrc log in the end, as we can do in normal
>> desktop applications.
>>
>> So, in one route I create an object and don't release it to simulate a
>> memleak.
>>
>> I've tried to set heaptrc.SetHeapTraceOutput('log.txt'). The app
>> creates the file, but there is no log there.
>
>
> This is definitely necessary.
>
>>
>> I've tried to execute using F9 IDE and by command-line too.
>> I think the problem is that we need to kill the server (Ctrl+C) and,
>> because that, no log is created.
>>
>> So, how can I see the log?
>
>
> Create a call that calls Application.Terminate.

Michael,

I believe there is a memleak but I couldn't found.
I've just created a route that calls Application.Terminate and I got this:

===BEGIN===
Heap dump by heaptrc unit
387 memory blocks allocated : 18658/19944
385 memory blocks freed     : 18626/19912
2 unfreed memory blocks : 32
True heap size : 196608 (96 used in System startup)
True free heap : 196320
Should be : 196352
Call trace for block $034CA470 size 16
  $0042D3C1
  $00438926
  $004375AA
  $00437268
  $004265FB
  $BAADF00D
  $BAADF00D
  $BAADF00D
Call trace for block $034CA410 size 16
  $0042CE3B
  $0042D3C1
  $00438926
  $004375AA
  $00437268
  $004265FB
  $BAADF00D
  $BAADF00D

===END===


Here is my test program:

===BEGIN===
program demo;

{$define STANDALONE}

uses
  SysUtils,
  httpdefs, httproute,
{$ifdef STANDALONE}
  fphttpapp,
{$endif}
{$ifdef FCGI}
  fpfcgi,
{$endif}
  IniFiles;

{$ifdef STANDALONE}
procedure TerminateCallBack({%H-}ARequest: TRequest; {%H-}AResponse: TResponse);
begin
  Application.Terminate;
end;

procedure ConfigureStandalone;
begin
  heaptrc.SetHeapTraceOutput('log.txt');
  heaptrc.GlobalSkipIfNoLeaks := True;
  heaptrc.HaltOnError := False;
  with TIniFile.Create('demo.ini') do
  try
    Application.Port := ReadInteger('Standalone','Port',8080);
  finally
    Free;
  end;
  HTTPRouter.RegisterRoute('quit', rmAll, @TerminateCallBack, True);
end;
{$endif}

begin
{$ifdef STANDALONE}
  ConfigureStandalone;
{$endif}
  Application.Initialize;
  Application.Run;
end.

===END===

My environment is:  Lazarus 1.8.3 r57764 FPC 3.0.4 i386-win32-win32/win64

Best regards,
Marcos Douglas