Re: About the memory leak

Hi :

    I have checked the viewml 0.22 , I didn't find anything change for memory leaks . 
    I think you'd better don't use the exit() to exit vieml ,unless exception .  You can add a button to the vieml or use a shortcut key such as ESC to exit . You can modifie main(...) function in the main.cpp as followed :

   while(Fl::wait) {
        if(Fl::event_key() == 27 ) // "ESC" 
          break;
}
  Just do like this you can exit viewml .

I have not notice the startthread you mentioned  , I will check it .  

                             xiaoguang zhang

----- Original Message ----- 
From: "Lambert Duijst" <[email protected]>
To: "ViewML development list" <[email protected]>
Sent: Wednesday, November 27, 2002 7:27 PM
Subject: Re: About the memory leak


> Hi all,
> 
> I am also looking at viewml to find it's memory leak(s). When viewml loads a 
> new page it looks like it doesn't clean up everything. I am running 
> viewml-0.21 (I see i have to check the 0.22 version) on an arm-linux platform 
> with only 16MB of ram. So a memory leak is easily detected there.
> I used libmpr to find out if there is balance between malloc and free calls.
> I also got a lot of unfreed malloc's. The problem here is that I should 
> terminate (call exit() or maybe even cause a segmentation fault ) viewml at a 
> place in the code where it should have freed all it's recources that are used 
> for the page that has just been flushed. Zhangxiaoguang, I'd like to know how 
> you terminate viewml. What I did is remove the multithreading (just call 
> runthread (this); in HTTPConnection::StartThread instead of pthread_create.
> Further I call exit just after delete clue in KHTMLWidget::parse (line 2000), 
> but I am not sure this is the right place.
> 
> Anyway, looking at /proc/meminfo I can see how much memory is consumed 
> everytime a new page is loaded (with a resolution of 4Kbyte). It looks like 
> pages with images cause a bigger memory leak, but I remember that this was 
> already mentioned in the mailing list earlier.
> 
> Furthermore I found out (with ddd / gdb ) that my list of threads only 
> increases in size everytime a new page is loaded. This is strange and looks 
> like one cause of a memory leak. It can be eliminated by calling 
> pthread_exit(0) just before the end of HTTPConnection::runthread.
> 
> Anyone else got a comment on this ?? , As I said before I also need to check 
> the 0.22 version. Maybe it is already a lot better.
> 
> One other thing: I tried to subscribe to the list, but I never received any 
> mails after that, but I see in the archives that there are new mails. Could 
> anyone add me please.
> 
> Thanks 
> 
> Lambert Duijst
> 
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