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Subject: Re: Memory leak on mac

Re: Memory leak on mac

From: Velichko Yuriy <velichko.yuriy_at_gmail.com>
Date: Wed, 17 Feb 2016 16:04:06 +0200

In the attached archive an example based on libssh2 docs:

http://www.libssh2.org/examples/tcpip-forward.html

In the attached code the port forwarding is implemented. In the infinity
loop we preforms port forwarding of the PostgreSQL port on the remote
computer. In the end of the loop all resources are freeing.

But memory increases constantly.

I think that I'm doing something wrong. Tell me please what exactly? )

On 16 February 2016 at 20:05, Velichko Yuriy <velichko.yuriy_at_gmail.com>
wrote:

> I will create a simple example in nearest time.
>
> On 16 February 2016 at 19:52, Will Cosgrove <will_at_panic.com> wrote:
>
>> You’ll need to post an example app showing this leak; I use libssh2 on
>> the Mac and have done extensive profiling and it does not leak in my use
>> cases.
>>
>> Will
>>
>> On Feb 16, 2016, at 9:43 AM, Velichko Yuriy <velichko.yuriy_at_gmail.com>
>> wrote:
>>
>> Hello!
>>
>> I have application, that among other things, checks accessibility of the
>> remote machine by connecting over ssh. The app immediately disconnect when
>> connection is confirmed. All works fine on Mac and Windows. But on mac the
>> app takes more and more memory (on windows is all right). The instruments
>> for XCode shows that memory is leak in function
>>
>> libssh2_default_alloc
>>
>> but I do not call this function directly anywhere.
>>
>> To release ssh handlers methods are used:
>>
>> libssh2_channel_free( );
>> libssh2_session_disconnect( );
>> libssh2_session_free( );
>>
>> All of them works without errors.
>>
>> IMPOTANT NOTE: the leak occur when session works in non-blocking mode:
>>
>> libssh2_session_set_blocking( ..., 0);
>>
>> if to use
>>
>> libssh2_session_set_blocking( ..., 1);
>>
>> There is no leak.
>>
>> Tell me please what a difference. What I doing wrong? Or may be this is a
>> little bug in libssh2?
>>
>> _______________________________________________
>> libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel
>>
>>
>>
>> _______________________________________________
>> libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel
>>
>>
>
>
> --
> ​С уважением, Величко Юрий.
>

-- 
​С уважением, Величко Юрий.


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Received on 2016-02-17

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