[Libevent-users] Libevent memory leak?

[Andrei Chirila <andreich@xxxxxxxxx>]

Hello,

I'm using libevent in some programs and I came across a memory leak in libevent. I'm wondering if I'm the one doing something wrong or it's really something in libevent.

Valgrind reports:

achirila@virtual-machine:~/src/tests$ valgrind --leak-check=full --show-reachable=yes ./test_event.exeÂ

==18888== Memcheck, a memory error detector

==18888== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.

==18888== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for copyright info

==18888== Command: ./test_event.exe

==18888==Â

==18888==Â

==18888== HEAP SUMMARY:

==18888== Â Â in use at exit: 80 bytes in 2 blocks

==18888== Â total heap usage: 40 allocs, 38 frees, 4,350 bytes allocated

==18888==Â

==18888== 40 bytes in 1 blocks are still reachable in loss record 1 of 2

==18888== Â Âat 0x4C2815C: malloc (vg_replace_malloc.c:236)

==18888== Â Âby 0x4D1759: evthread_posix_lock_alloc (evthread_pthread.c:48)

==18888== Â Âby 0x4C8341: evsig_init (signal.c:174)

==18888== Â Âby 0x4C7AD2: epoll_init (epoll.c:142)

==18888== Â Âby 0x4B9184: event_base_new_with_config (event.c:601)

==18888== Â Âby 0x4B92A4: event_base_new (event.c:439)

==18888== Â Âby 0x404181: main (test_event.c:11)

==18888==Â

==18888== 40 bytes in 1 blocks are still reachable in loss record 2 of 2

==18888== Â Âat 0x4C2815C: malloc (vg_replace_malloc.c:236)

==18888== Â Âby 0x4D1759: evthread_posix_lock_alloc (evthread_pthread.c:48)

==18888== Â Âby 0x4D1361: evutil_secure_rng_init (evutil_rand.c:102)

==18888== Â Âby 0x4D09EE: evdns_base_new (evdns.c:3756)

==18888== Â Âby 0x404196: main (test_event.c:12)

==18888==Â

==18888== LEAK SUMMARY:

==18888== Â Âdefinitely lost: 0 bytes in 0 blocks

==18888== Â Âindirectly lost: 0 bytes in 0 blocks

==18888== Â Â Âpossibly lost: 0 bytes in 0 blocks

==18888== Â Âstill reachable: 80 bytes in 2 blocks

==18888== Â Â Â Â suppressed: 0 bytes in 0 blocks

==18888==Â

==18888== For counts of detected and suppressed errors, rerun with: -v

==18888== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 4 from 4)

Test program:

#include <stdlib.h>

#include <event2/event.h>

#include <event2/dns.h>

int main() {Â

  if(evthread_use_pthreads() < 0) {

    fprintf(stderr, "Could not enable pthreads support in libevent\n");

    exit(1);

  }

  struct event_base *ebp = event_base_new();

  struct evdns_base *dns = evdns_base_new(ebp, 1);

  evdns_base_free(dns, 1);

  event_base_free(ebp);

  return 0;

}

Thank you,

Andrei Chirila

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