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Re: [Libevent-users] Memory leak in locks?




On Jan 9, 2015, at 12:20 PM, Azat Khuzhin <a3at.mail@xxxxxxxxx> wrote:


On Jan 9, 2015 11:19 PM, "Ralph Castain" <rhc@xxxxxxxxxxxx> wrote:
>
> Thanks to both you and Tomer! I added a configure check for the function so I can use it when available - otherwise, someone will just have to live with the 40 bytes of loss :-)

If you use valgrind for automatic testing, then you could use suppression.


For my own purposes, sure - but it can sometimes be hard to get users to remember to add the suppression file when testing their own codeâand the memory is still âlostâ when they finalize the library in production runs.

>
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>> On Jan 9, 2015, at 12:11 PM, Azat Khuzhin <a3at.mail@xxxxxxxxx> wrote:
>>
>>
>> On Jan 9, 2015 9:05 PM, "Ralph Castain" <rhc@xxxxxxxxxxxx> wrote:
>> >
>> > Hi folks
>> >
>> > Iâve trying to make a new library that uses libevent be valgrind clean. This is a threaded library, and so libevent is thread enabled. I create a new event base, and I call event_base_free before finalizing.
>> >
>> > However, I keep seeing reports like this:
>> >
>> > ==16029== 40 bytes in 1 blocks are still reachable in loss record 1 of 3
>> > ==16029==    at 0x4C288FE: malloc (in /home/common/local/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
>> > ==16029==    by 0x52A9EE1: evthread_posix_lock_alloc (evthread_pthread.c:46)
>> > ==16029==    by 0x5075572: event_global_setup_locks_ (event.c:2900)
>> > ==16029==    by 0x52AA08A: evthread_use_pthreads (evthread_pthread.c:185)
>> >
>> > This is with libevent 2.0.22-stable. Is this an expected situation? Or is there something I need to do beyond event_base_free to get a clean finalize?
>> >
>> > Thanks
>> > Ralph
>>
>> HI Ralph,
>>
>> In 2.1 you will have libevent_global_shutdown().
>> But unfortunately it is not ported to 2.0 AFAIK.
>>
>> >
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