Date: Wed, 16 Feb 2005 12:16:26 +0100 From: des@des.no (=?iso-8859-1?q?Dag-Erling_Sm=F8rgrav?=) To: hackers@freebsd.org Subject: memory leak in resolver Message-ID: <86mzu4sqk5.fsf@xps.des.no>
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des@xps ~/src/gai% cat gai.c #include <sys/types.h> #include <sys/socket.h> #include <netdb.h> #include <string.h> int main(void) { struct addrinfo hint, *res; memset(&hint, 0, sizeof(hint)); hint.ai_family =3D AF_INET; hint.ai_socktype =3D SOCK_STREAM; hint.ai_protocol =3D 0; if (getaddrinfo("www.freebsd.org", "http", &hint, &res) =3D=3D 0) freeaddrinfo(res); return (0); } des@xps ~/src/gai% valgrind --leak-check=3Dyes --num-callers=3D8 ./gai =3D=3D44998=3D=3D Memcheck, a memory error detector for x86-linux. =3D=3D44998=3D=3D Copyright (C) 2002-2004, and GNU GPL'd, by Julian Seward. =3D=3D44998=3D=3D Using valgrind-2.1.0, a program supervision framework for= x86-linux. =3D=3D44998=3D=3D Copyright (C) 2000-2004, and GNU GPL'd, by Julian Seward. =3D=3D44998=3D=3D Estimated CPU clock rate is 3591 MHz =3D=3D44998=3D=3D For more details, rerun with: -v =3D=3D44998=3D=3D =3D=3D44998=3D=3D =3D=3D44998=3D=3D ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 fr= om 0) =3D=3D44998=3D=3D malloc/free: in use at exit: 2328 bytes in 11 blocks. =3D=3D44998=3D=3D malloc/free: 45 allocs, 34 frees, 232569 bytes allocated. =3D=3D44998=3D=3D For counts of detected errors, rerun with: -v =3D=3D44998=3D=3D searching for pointers to 11 not-freed blocks. =3D=3D44998=3D=3D checked 1258740 bytes. =3D=3D44998=3D=3D =3D=3D44998=3D=3D 49 bytes in 5 blocks are definitely lost in loss record 2= of 5 =3D=3D44998=3D=3D at 0x3C033173: malloc (vg_replace_malloc.c:105) =3D=3D44998=3D=3D by 0x3C0D567E: strdup (strdup.c:52) =3D=3D44998=3D=3D by 0x3C0D0403: _nsyylex (nslexer.l:88) =3D=3D44998=3D=3D by 0x3C0CF903: _nsyyparse (y.tab.c:380) =3D=3D44998=3D=3D by 0x3C0D296E: _nsdispatch (nsdispatch.c:353) =3D=3D44998=3D=3D by 0x3C0C6E33: getaddrinfo (getaddrinfo.c:1646) =3D=3D44998=3D=3D by 0x804856C: main (gai.c:15) =3D=3D44998=3D=3D =3D=3D44998=3D=3D LEAK SUMMARY: =3D=3D44998=3D=3D definitely lost: 49 bytes in 5 blocks. =3D=3D44998=3D=3D possibly lost: 0 bytes in 0 blocks. =3D=3D44998=3D=3D still reachable: 2279 bytes in 6 blocks. =3D=3D44998=3D=3D suppressed: 0 bytes in 0 blocks. =3D=3D44998=3D=3D Reachable blocks (those to which a pointer was found) are= not shown. =3D=3D44998=3D=3D To see them, rerun with: --show-reachable=3Dyes The amount of memory leaked seems constant regardless of how many times getaddrinfo() is called, so it's probably from reading resolv.conf. DES --=20 Dag-Erling Sm=F8rgrav - des@des.no
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