Hello,
there is (still) a memory leak in memcached module, discovered on a
report by Dragos Oancea.
The pkg usage logs are like:
0(24328) NOTICE: qm_status: 19010. N address=0x7fb23683bc98
frag=0x7fb23683bc68 size=8 used=1
0(24328) NOTICE: qm_status: alloc'd from memcached:
../../parser/../ut.h: pkg_str_dup(733)
0(24328) NOTICE: qm_status: start check=f0f0f0f0, end check=
c0c0c0c0, abcdefed
0(24328) NOTICE: qm_status: 19011. N address=0x7fb23683bd00
frag=0x7fb23683bcd0 size=48 used=1
0(24328) NOTICE: qm_status: alloc'd from memcached:
memcached.c: mcd_malloc(127)
0(24328) NOTICE: qm_status: start check=f0f0f0f0, end check=
c0c0c0c0, abcdefed
0(24328) NOTICE: qm_status: 19012. N address=0x7fb23683bd90
frag=0x7fb23683bd60 size=8 used=1
0(24328) NOTICE: qm_status: alloc'd from memcached:
../../parser/../ut.h: pkg_str_dup(733)
0(24328) NOTICE: qm_status: start check=f0f0f0f0, end check=
c0c0c0c0, abcdefed
0(24328) NOTICE: qm_status: 19013. N address=0x7fb23683bdf8
frag=0x7fb23683bdc8 size=48 used=1
0(24328) NOTICE: qm_status: alloc'd from memcached:
memcached.c: mcd_malloc(127)
0(24328) NOTICE: qm_status: start check=f0f0f0f0, end check=
c0c0c0c0, abcdefed
0(24328) NOTICE: qm_status: 19014. N address=0x7fb23683be88
frag=0x7fb23683be58 size=8 used=1
0(24328) NOTICE: qm_status: alloc'd from memcached:
memcached.c: mcd_malloc(127)
0(24328) NOTICE: qm_status: start check=f0f0f0f0, end check=
c0c0c0c0, abcdefed
0(24328) NOTICE: qm_status: 19015. N address=0x7fb23683bef0
frag=0x7fb23683bec0 size=16 used=1
0(24328) NOTICE: qm_status: alloc'd from memcached:
../../parser/../ut.h: pkg_str_dup(733)
0(24328) NOTICE: qm_status: start check=f0f0f0f0, end check=
c0c0c0c0, abcdefed
0(24328) NOTICE: qm_status: 19016. N address=0x7fb23683bf60
frag=0x7fb23683bf30 size=8 used=1
0(24328) NOTICE: qm_status: alloc'd from memcached:
memcached.c: mcd_malloc(127)
0(24328) NOTICE: qm_status: start check=f0f0f0f0, end check=
c0c0c0c0, abcdefed
0(24328) NOTICE: qm_status: 19017. N address=0x7fb23683bfc8
frag=0x7fb23683bf98 size=24 used=1
0(24328) NOTICE: qm_status: alloc'd from memcached:
../../parser/../ut.h: pkg_str_dup(733)
0(24328) NOTICE: qm_status: start check=f0f0f0f0, end check=
c0c0c0c0, abcdefed
The one related to pkg_str_dup() should be fixed by the commit:
-
http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=6faf12653c1db9f011b1826061824c831bda3f58
The other one is related to mcd_malloc(), which I guess it is due to the
function that returns the value from memchache, memcached_get() used in
pv_get_mcd_value_helper() -- the returned object has to be freed by
calling code, according to:
- http://docs.libmemcached.org/memcached_get.html
Since the libmemcached was initialized with wrappers around pkg
malloc/free, I expect the respective free function has to be used to
free the result.
Can any of memcached devs check my commit and investigate further the
second leak?
Cheers,
Daniel
--
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Kamailio Advanced Trainings - Berlin, Nov 25-28; Miami, Nov 18-20, 2013
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