Hello,

Is there a way to monitor the garbage collector at runtime? 
Memwatch is not an option, the app runs at various enduser sites. (i have no direct access to the servers)

It seems i have a memory leak somewhere, probably my own mistake.
After 2-4 weeks of continues running the app, i encounter a FATAL error.
Module: EXE
Error Codes: EH: 1006 Sub: 0(0) OS: 0 XPP: 15

I would like to monitor the number of memory handles, the status of the garbage collectior  (is it still running ?), and create a log file.

Suggestions are welcome.
Regards
Jack Duijf

-------------------------------------------------------------
Also a member off the XXP (http://www.xxp.nl)

On Sat, 18 Aug 2018 20:52:18 +0200, Jack Duijf wrote:

> Hello,
> 
> Is there a way to monitor the garbage collector at runtime? 
> Memwatch is not an option, the app runs at various enduser sites. (i have no direct access to the servers)
> 
> It seems i have a memory leak somewhere, probably my own mistake.
> After 2-4 weeks of continues running the app, i encounter a FATAL error.
> Module: EXE
> Error Codes: EH: 1006 Sub: 0(0) OS: 0 XPP: 15
> 
> I would like to monitor the number of memory handles, the status of the garbage collectior  (is it still running ?), and create a log file.
> 
> Suggestions are welcome.
> Regards
> Jack Duijf
> 
> -------------------------------------------------------------
> Also a member off the XXP (http://www.xxp.nl)


if for you is enough to have the same info as colleted in standard memwatch
solution in log file,  you can try this code:

    at start  app ------------------------
   nH := DllLoad( "memwatch.dll",, .t. )
   oMW := DllCall( nH, ,"XbpMemwatch" )

   oDlg := oMW:new():create():hide()
   oDlg:oLogTofile:SetData( .t. )
   oDlg:oFileName:SetData( "aa.log" )
   oDlg:ActivateLog()

    you can call this  method  in appropriate points in your code
   oDlg:LogInfo()

    at exit  app --------------------------------
   oDlg:oLogTofile:SetData(  .f.  )
   oDlg:ActivateLog()
   oDlg:destroy()

 
Additionally, logging of XPBʼs ( 1ʼst tab in memwatch window )  also is
possible,  but this has some impact to performance. 
(Read note about SyncGC button in memwatch.hlp ).  

Regards, Pavelas

Hello Pavelas,

Thank you for the code sample.
I wil inplement this in my app.
I hope this wil help me to find my memoty-leak.

Jack


On Thu, 23 Aug 2018 09:43:14 +0300, Pavelas Pisarevskis <pavelas.pisarevskis@vda.lt> wrote:

>On Sat, 18 Aug 2018 20:52:18 +0200, Jack Duijf wrote:
>
>> Hello,
>> 
>> Is there a way to monitor the garbage collector at runtime? 
>> Memwatch is not an option, the app runs at various enduser sites. (i have no direct access to the servers)
>> 
>> It seems i have a memory leak somewhere, probably my own mistake.
>> After 2-4 weeks of continues running the app, i encounter a FATAL error.
>> Module: EXE
>> Error Codes: EH: 1006 Sub: 0(0) OS: 0 XPP: 15
>> 
>> I would like to monitor the number of memory handles, the status of the garbage collectior  (is it still running ?), and create a log file.
>> 
>> Suggestions are welcome.
>> Regards
>> Jack Duijf
>> 
>> -------------------------------------------------------------
>> Also a member off the XXP (http://www.xxp.nl)
>
>
>if for you is enough to have the same info as colleted in standard memwatch
>solution in log file,  you can try this code:
>
>    at start  app ------------------------
>   nH := DllLoad( "memwatch.dll",, .t. )
>   oMW := DllCall( nH, ,"XbpMemwatch" )
>
>   oDlg := oMW:new():create():hide()
>   oDlg:oLogTofile:SetData( .t. )
>   oDlg:oFileName:SetData( "aa.log" )
>   oDlg:ActivateLog()
>
>    you can call this  method  in appropriate points in your code
>   oDlg:LogInfo()
>
>    at exit  app --------------------------------
>   oDlg:oLogTofile:SetData(  .f.  )
>   oDlg:ActivateLog()
>   oDlg:destroy()
>
> 
>Additionally, logging of XPB’s ( 1’st tab in memwatch window )  also is
>possible,  but this has some impact to performance. 
>(Read note about SyncGC button in memwatch.hlp ).  
>
>Regards, Pavelas
>
>

On 8/23/2018 12:43 AM, Pavelas Pisarevskis wrote:
> On Sat, 18 Aug 2018 20:52:18 +0200, Jack Duijf wrote:
> 
>> Hello,
>>
>> Is there a way to monitor the garbage collector at runtime?
>> Memwatch is not an option, the app runs at various enduser sites. (i have no direct access to the servers)
>>
>> It seems i have a memory leak somewhere, probably my own mistake.
>> After 2-4 weeks of continues running the app, i encounter a FATAL error.
>> Module: EXE
>> Error Codes: EH: 1006 Sub: 0(0) OS: 0 XPP: 15
>>
>> I would like to monitor the number of memory handles, the status of the garbage collectior  (is it still running ?), and create a log file.
>>
>> Suggestions are welcome.
>> Regards
>> Jack Duijf
>>
>> -------------------------------------------------------------
>> Also a member off the XXP (http://www.xxp.nl)
> 
> 
> if for you is enough to have the same info as colleted in standard memwatch
> solution in log file,  you can try this code:
> 
>      at start  app ------------------------
>     nH := DllLoad( "memwatch.dll",, .t. )
>     oMW := DllCall( nH, ,"XbpMemwatch" )
> 
>     oDlg := oMW:new():create():hide()
>     oDlg:oLogTofile:SetData( .t. )
>     oDlg:oFileName:SetData( "aa.log" )
>     oDlg:ActivateLog()
> 
>      you can call this  method  in appropriate points in your code
>     oDlg:LogInfo()
> 
>      at exit  app --------------------------------
>     oDlg:oLogTofile:SetData(  .f.  )
>     oDlg:ActivateLog()
>     oDlg:destroy()
> 
>   
> Additionally, logging of XPBʼs ( 1ʼst tab in memwatch window )  also is
> possible,  but this has some impact to performance.
> (Read note about SyncGC button in memwatch.hlp ).
> 
> Regards, Pavelas
> 
>   
> 
Hi Pavelas,

Thanks for the code.

Can you tell me where I might find the MemWatch.hlp file?

Thanks... Jonathan

jonathan.leeming@the-family-centre.com
Edmonton, Alberta, Canada

Jonathan,

>Can you tell me where I might find the MemWatch.hlp file?

The MemWatch.hlp file was included (in two versions) in (at least) six 
separate Xbase++ versions/releases -- all with identical content (besides 
the copyright dates and version/build numbers), including: 1.80.284, 
1.82.293, 1.82.294, 1.90.322, 1.90.326, and 1.90.331.

If you have a CD (or download) of any of those versions, you should have 
this help file, too.

Andreas

Andreas Gehrs-Pahl
Absolute Software, LLC

phone: (989) 723-9927
email: Andreas@AbsoluteSoftwareLLC.com
web:   http://www.AbsoluteSoftwareLLC.com
[F]:   https://www.facebook.com/AbsoluteSoftwareLLC

Andreas,

> The MemWatch.hlp file was included (in two versions) in (at least) six 
> separate Xbase++ versions/releases -- all with identical content (besides 
> the copyright dates and version/build numbers), including: 1.80.284, 
> 1.82.293, 1.82.294, 1.90.322, 1.90.326, and 1.90.331.

You keep surprising me. Do you have all these versions live available?
I have just the last 1.9 version installed (and have not used it for the
last two, maybe even three years). Actually I think I would have a problem
recreating this version with all the hotfixes etc.
As for version 2.0, I only keep the builds that I installed with a release
of my software.

Peter

Peter,

>You keep surprising me. Do you have all these versions live available?

As a matter of fact, I do. I have all Xbase++ version (that I ever received) 
in separate directories, and can switch between them by simply renaming some 
directories. This includes beta versions that were time-limited and won't 
even work anymore.

But the ability to compare versions, especially sample source code and the 
documentation, but also versions of DLLs and date/time stamps, etc., is a 
valuable resource. There is a lot that can be learned about Xbase++ and its 
historic development from comparing individual versions.

And if there is an error or issue, it sometimes helps to test it with older 
versions to see if, and when, an issue first appeared and if, and when, it 
might have been fixed.

Andreas

Andreas Gehrs-Pahl
Absolute Software, LLC

phone: (989) 723-9927
email: Andreas@AbsoluteSoftwareLLC.com
web:   http://www.AbsoluteSoftwareLLC.com
[F]:   https://www.facebook.com/AbsoluteSoftwareLLC

On 8/26/2018 3:35 PM, Andreas Gehrs-Pahl wrote:
> Jonathan,
> 
>> Can you tell me where I might find the MemWatch.hlp file?
> 
> The MemWatch.hlp file was included (in two versions) in (at least) six
> separate Xbase++ versions/releases -- all with identical content (besides
> the copyright dates and version/build numbers), including: 1.80.284,
> 1.82.293, 1.82.294, 1.90.322, 1.90.326, and 1.90.331.
> 
> If you have a CD (or download) of any of those versions, you should have
> this help file, too.
> 
> Andreas
> 
Thanks Andreas,

I found it on my Alaska Software Volume 6SL1 Pro CD (ver 1.90.355).  Not 
exactly a wealth of information but more than I had yesterday!

I had not looked at that CD for a number of years but may revisit some 
of the material (there is a lot there) when I have some free time.

Thanks once again... Jonathan

jonathan.leeming@the-family-centre.com
Edmonton, Alberta, Canada