22.12.2010 15:26, Bart Van Assche wrote:
That's interesting. Can you please run the entire snmpd (open source
code + your MIB) through Valgrind (first through memcheck, next through
Helgrind and/or DRD) ? The output of these tools should allow to find
out what is causing threads to stop unexpectedly.
Done it. I can't see anything suspicious in logs from valgrind, but I've
never used this tool before, so, maybe someone more expirienced will
make something out of it.
I attached logs from memcheck and helgrind, and also source for my agent
module.
In 5.6.rc1, I see only one string in that file I open in module, but it
should write that string every second (And it does that in 5.4.2.1).
Thanks in advance for any help.
Kirill.
==11962== Helgrind, a thread error detector
==11962== Copyright (C) 2007-2010, and GNU GPL'd, by OpenWorks LLP et al.
==11962== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for copyright info
==11962== Command: ./snmpd -c /home/kovarny/home/Work/4/net-snmp-5.6.1.rc1/agent/snmpd.conf
==11962== Parent PID: 11961
==11962==
--11962--
--11962-- Valgrind options:
--11962-- --suppressions=/usr/lib/valgrind/debian-libc6-dbg.supp
--11962-- --tool=helgrind
--11962-- -v
--11962-- --log-file=/home/kovarny/home/Work/4/%p-log
--11962-- Contents of /proc/version:
--11962-- Linux version 2.6.32-3-686 (Debian 2.6.32-9) ([email protected]) (gcc version 4.3.4 (Debian 4.3.4-8) ) #1 SMP Thu Feb 25 06:14:20 UTC 2010
--11962-- Arch and hwcaps: X86, x86-sse1-sse2
--11962-- Page sizes: currently 4096, max supported 4096
--11962-- Valgrind library directory: /usr/lib/valgrind
--11962-- Reading syms from /lib/ld-2.11.2.so (0x4000000)
--11962-- Considering /lib/ld-2.11.2.so ..
--11962-- .. CRC mismatch (computed a4915861 wanted 0462c1f5)
--11962-- Considering /usr/lib/debug/lib/ld-2.11.2.so ..
--11962-- .. CRC is valid
--11962-- Reading syms from /home/kovarny/home/Work/4/net-snmp-5.6.1.rc1/agent/snmpd (0x8048000)
--11962-- Reading syms from /usr/lib/valgrind/helgrind-x86-linux (0x38000000)
--11962-- object doesn't have a dynamic symbol table
--11962-- Reading suppressions file: /usr/lib/valgrind/debian-libc6-dbg.supp
--11962-- Reading suppressions file: /usr/lib/valgrind/default.supp
--11962-- Reading syms from /usr/lib/valgrind/vgpreload_core-x86-linux.so (0x401f000)
--11962-- Reading syms from /usr/lib/valgrind/vgpreload_helgrind-x86-linux.so (0x4021000)
--11962-- REDIR: 0x40160c0 (index) redirected to 0x40270cd (index)
--11962-- REDIR: 0x40162a0 (strlen) redirected to 0x4027178 (strlen)
--11962-- Reading syms from /lib/i686/cmov/libdl-2.11.2.so (0x4041000)
--11962-- Considering /lib/i686/cmov/libdl-2.11.2.so ..
--11962-- .. CRC mismatch (computed f1b62628 wanted 22ba0eb5)
--11962-- Considering /usr/lib/debug/lib/i686/cmov/libdl-2.11.2.so ..
--11962-- .. CRC is valid
--11962-- Reading syms from /lib/i686/cmov/libc-2.11.2.so (0x4046000)
--11962-- Considering /lib/i686/cmov/libc-2.11.2.so ..
--11962-- .. CRC mismatch (computed fc60a6e3 wanted 7f6d3e93)
--11962-- Considering /usr/lib/debug/lib/i686/cmov/libc-2.11.2.so ..
--11962-- .. CRC is valid
--11962-- Reading syms from /lib/i686/cmov/libpthread-2.11.2.so (0x418c000)
--11962-- Considering /lib/i686/cmov/libpthread-2.11.2.so ..
--11962-- .. CRC mismatch (computed 73226651 wanted 1f7e233b)
--11962-- Considering /usr/lib/debug/lib/i686/cmov/libpthread-2.11.2.so ..
--11962-- .. CRC is valid
--11962-- REDIR: 0x40b8cc0 (index) redirected to 0x402706d (index)
--11962-- REDIR: 0x40b5c30 (malloc) redirected to 0x402440b (malloc)
--11962-- REDIR: 0x40baad0 (memcpy) redirected to 0x40272c0 (memcpy)
--11962-- REDIR: 0x40b5350 (calloc) redirected to 0x40236ef (calloc)
--11962-- REDIR: 0x40b93d0 (strlen) redirected to 0x401f42c (_vgnU_ifunc_wrapper)
--11962-- REDIR: 0x40b9410 (__strlen_sse2) redirected to 0x402715d (strlen)
--11962-- REDIR: 0x40b8ea0 (strcpy) redirected to 0x40271ae (strcpy)
--11962-- REDIR: 0x40b8e30 (strcmp) redirected to 0x40271d6 (strcmp)
--11962-- REDIR: 0x40b5b50 (free) redirected to 0x4024025 (free)
==11962== Warning: noted but unhandled ioctl 0x8946 with no size/direction hints
==11962== This could cause spurious value errors to appear.
==11962== See README_MISSING_SYSCALL_OR_IOCTL for guidance on writing a proper wrapper.
==11962== Warning: noted but unhandled ioctl 0x8946 with no size/direction hints
==11962== This could cause spurious value errors to appear.
==11962== See README_MISSING_SYSCALL_OR_IOCTL for guidance on writing a proper wrapper.
==11962== Warning: noted but unhandled ioctl 0x8946 with no size/direction hints
==11962== This could cause spurious value errors to appear.
==11962== See README_MISSING_SYSCALL_OR_IOCTL for guidance on writing a proper wrapper.
--11962-- REDIR: 0x4191d00 (pthread_create@@GLIBC_2.1) redirected to 0x4028698 (pthread_cre...@*)
--11962-- REDIR: 0x40b6bb0 (realloc) redirected to 0x40244ba (realloc)
--11962-- REDIR: 0x41956f0 (pthread_rwlock_wrlock) redirected to 0x4026544 (pthread_rwlock_wrlock)
--11962-- REDIR: 0x4195a40 (pthread_rwlock_unlock) redirected to 0x4026a46 (pthread_rwlock_unlock)
--11962-- REDIR: 0x4193e10 (pthread_mutex_lock) redirected to 0x402533f (pthread_mutex_lock)
--11962-- REDIR: 0x4195300 (pthread_mutex_unlock) redirected to 0x402570f (pthread_mutex_unlock)
--11975-- REDIR: 0x4193e10 (pthread_mutex_lock) redirected to 0x402533f (pthread_mutex_lock)
--11975-- REDIR: 0x4195300 (pthread_mutex_unlock) redirected to 0x402570f (pthread_mutex_unlock)
==11962==
==11962== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 6 from 5)
--11962--
--11962-- used_suppression: 6 helgrind-glibc2X-004
==11962==
==11962== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 6 from 5)
==11975==
==11975== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 9 from 8)
--11975--
--11975-- used_suppression: 9 helgrind-glibc2X-004
==11975==
==11975== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 9 from 8)
==12025== Memcheck, a memory error detector
==12025== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==12025== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for copyright info
==12025== Command: ./snmpd -c /home/kovarny/home/Work/4/net-snmp-5.6.1.rc1/agent/snmpd.conf
==12025== Parent PID: 12024
==12025==
--12025--
--12025-- Valgrind options:
--12025-- --suppressions=/usr/lib/valgrind/debian-libc6-dbg.supp
--12025-- -v
--12025-- --log-file=/home/kovarny/home/Work/4/%p-log
--12025-- Contents of /proc/version:
--12025-- Linux version 2.6.32-3-686 (Debian 2.6.32-9) ([email protected]) (gcc version 4.3.4 (Debian 4.3.4-8) ) #1 SMP Thu Feb 25 06:14:20 UTC 2010
--12025-- Arch and hwcaps: X86, x86-sse1-sse2
--12025-- Page sizes: currently 4096, max supported 4096
--12025-- Valgrind library directory: /usr/lib/valgrind
--12025-- Reading syms from /lib/ld-2.11.2.so (0x4000000)
--12025-- Considering /lib/ld-2.11.2.so ..
--12025-- .. CRC mismatch (computed a4915861 wanted 0462c1f5)
--12025-- Considering /usr/lib/debug/lib/ld-2.11.2.so ..
--12025-- .. CRC is valid
--12025-- Reading syms from /home/kovarny/home/Work/4/net-snmp-5.6.1.rc1/agent/snmpd (0x8048000)
--12025-- Reading syms from /usr/lib/valgrind/memcheck-x86-linux (0x38000000)
--12025-- object doesn't have a dynamic symbol table
--12025-- Reading suppressions file: /usr/lib/valgrind/debian-libc6-dbg.supp
--12025-- Reading suppressions file: /usr/lib/valgrind/default.supp
--12025-- REDIR: 0x40160c0 (index) redirected to 0x3803eda3 (vgPlain_x86_linux_REDIR_FOR_index)
--12025-- Reading syms from /usr/lib/valgrind/vgpreload_core-x86-linux.so (0x401f000)
--12025-- Reading syms from /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so (0x4021000)
==12025== WARNING: new redirection conflicts with existing -- ignoring it
--12025-- new: 0x040160c0 (index ) R-> 0x04024cb0 index
--12025-- REDIR: 0x40162a0 (strlen) redirected to 0x40250f0 (strlen)
--12025-- Reading syms from /lib/i686/cmov/libdl-2.11.2.so (0x403e000)
--12025-- Considering /lib/i686/cmov/libdl-2.11.2.so ..
--12025-- .. CRC mismatch (computed f1b62628 wanted 22ba0eb5)
--12025-- Considering /usr/lib/debug/lib/i686/cmov/libdl-2.11.2.so ..
--12025-- .. CRC is valid
--12025-- Reading syms from /lib/i686/cmov/libc-2.11.2.so (0x4043000)
--12025-- Considering /lib/i686/cmov/libc-2.11.2.so ..
--12025-- .. CRC mismatch (computed fc60a6e3 wanted 7f6d3e93)
--12025-- Considering /usr/lib/debug/lib/i686/cmov/libc-2.11.2.so ..
--12025-- .. CRC is valid
--12025-- Reading syms from /lib/i686/cmov/libpthread-2.11.2.so (0x4189000)
--12025-- Considering /lib/i686/cmov/libpthread-2.11.2.so ..
--12025-- .. CRC mismatch (computed 73226651 wanted 1f7e233b)
--12025-- Considering /usr/lib/debug/lib/i686/cmov/libpthread-2.11.2.so ..
--12025-- .. CRC is valid
--12025-- REDIR: 0x40b5cc0 (index) redirected to 0x4024c20 (index)
--12025-- REDIR: 0x40b70d0 (memchr) redirected to 0x4025830 (memchr)
--12025-- REDIR: 0x40b6840 (rindex) redirected to 0x4024b60 (rindex)
--12025-- REDIR: 0x40b6760 (strncpy) redirected to 0x40252f0 (strncpy)
--12025-- REDIR: 0x40b6490 (__GI_strlen) redirected to 0x40250d0 (__GI_strlen)
--12025-- REDIR: 0x40b2c30 (malloc) redirected to 0x4023ecb (malloc)
--12025-- REDIR: 0x40b7ad0 (memcpy) redirected to 0x4025870 (memcpy)
--12025-- REDIR: 0x40b2350 (calloc) redirected to 0x40231af (calloc)
--12025-- REDIR: 0x40b63d0 (strlen) redirected to 0x401f42c (_vgnU_ifunc_wrapper)
--12025-- REDIR: 0x40b6410 (__strlen_sse2) redirected to 0x40250b0 (strlen)
--12025-- REDIR: 0x40b5ea0 (strcpy) redirected to 0x4025130 (strcpy)
--12025-- REDIR: 0x40b5e30 (strcmp) redirected to 0x40256b0 (strcmp)
--12025-- REDIR: 0x40b2b50 (free) redirected to 0x4023ae5 (free)
--12025-- REDIR: 0x40b7560 (memmove) redirected to 0x4026510 (memmove)
--12025-- REDIR: 0x40b8e00 (strchrnul) redirected to 0x4026590 (strchrnul)
--12025-- REDIR: 0x40b7630 (mempcpy) redirected to 0x4026600 (mempcpy)
--12025-- REDIR: 0x40b6680 (strncmp) redirected to 0x40255d0 (strncmp)
--12025-- REDIR: 0x40b8d30 (rawmemchr) redirected to 0x40265c0 (rawmemchr)
==12025== Warning: noted but unhandled ioctl 0x8946 with no size/direction hints
==12025== This could cause spurious value errors to appear.
==12025== See README_MISSING_SYSCALL_OR_IOCTL for guidance on writing a proper wrapper.
==12025== Warning: noted but unhandled ioctl 0x8946 with no size/direction hints
==12025== This could cause spurious value errors to appear.
==12025== See README_MISSING_SYSCALL_OR_IOCTL for guidance on writing a proper wrapper.
==12025== Warning: noted but unhandled ioctl 0x8946 with no size/direction hints
==12025== This could cause spurious value errors to appear.
==12025== See README_MISSING_SYSCALL_OR_IOCTL for guidance on writing a proper wrapper.
--12025-- REDIR: 0x40b3bb0 (realloc) redirected to 0x4023f7a (realloc)
--12025-- REDIR: 0x40b5b10 (strcat) redirected to 0x4024d40 (strcat)
--12025-- REDIR: 0x40b77c0 (stpcpy) redirected to 0x4026120 (stpcpy)
--12025-- REDIR: 0x40b6550 (strnlen) redirected to 0x4025030 (strnlen)
--12025-- REDIR: 0x40b75d0 (memset) redirected to 0x40264a0 (memset)
==12025==
==12025== HEAP SUMMARY:
==12025== in use at exit: 466,468 bytes in 11,639 blocks
==12025== total heap usage: 12,906 allocs, 1,267 frees, 541,210 bytes allocated
==12025==
==12025== Searching for pointers to 11,639 not-freed blocks
==12032==
==12032== HEAP SUMMARY:
==12032== in use at exit: 466,332 bytes in 11,638 blocks
==12032== total heap usage: 12,906 allocs, 1,268 frees, 541,210 bytes allocated
==12032==
==12032== Searching for pointers to 11,638 not-freed blocks
==12025== Checked 9,299,428 bytes
==12025==
==12025== LEAK SUMMARY:
==12025== definitely lost: 0 bytes in 0 blocks
==12025== indirectly lost: 0 bytes in 0 blocks
==12025== possibly lost: 136 bytes in 1 blocks
==12025== still reachable: 466,332 bytes in 11,638 blocks
==12025== suppressed: 0 bytes in 0 blocks
==12025== Rerun with --leak-check=full to see details of leaked memory
==12025==
==12025== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 16 from 7)
--12025--
--12025-- used_suppression: 16 dl-hack3-cond-1
==12025==
==12025== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 16 from 7)
==12032== Checked 911,512 bytes
==12032==
==12032== LEAK SUMMARY:
==12032== definitely lost: 0 bytes in 0 blocks
==12032== indirectly lost: 0 bytes in 0 blocks
==12032== possibly lost: 0 bytes in 0 blocks
==12032== still reachable: 466,332 bytes in 11,638 blocks
==12032== suppressed: 0 bytes in 0 blocks
==12032== Rerun with --leak-check=full to see details of leaked memory
==12032==
==12032== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 16 from 7)
--12032--
--12032-- used_suppression: 16 dl-hack3-cond-1
==12032==
==12032== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 16 from 7)
==12033==
==12033== HEAP SUMMARY:
==12033== in use at exit: 144,711 bytes in 699 blocks
==12033== total heap usage: 13,435 allocs, 12,736 frees, 641,759 bytes allocated
==12033==
==12033== Searching for pointers to 699 not-freed blocks
==12033== Checked 538,388 bytes
==12033==
==12033== LEAK SUMMARY:
==12033== definitely lost: 5,702 bytes in 283 blocks
==12033== indirectly lost: 47,079 bytes in 107 blocks
==12033== possibly lost: 0 bytes in 0 blocks
==12033== still reachable: 91,930 bytes in 309 blocks
==12033== suppressed: 0 bytes in 0 blocks
==12033== Rerun with --leak-check=full to see details of leaked memory
==12033==
==12033== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 16 from 7)
--12033--
--12033-- used_suppression: 16 dl-hack3-cond-1
==12033==
==12033== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 16 from 7)
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include "thread_test.h"
int already_done = 0;
pthread_t test_thread;
FILE *fl = NULL;
void init_thread_test(void)
{
snmp_log(LOG_INFO, "%s started\n", __FUNCTION__);
fl = fopen("/home/kovarny/logs/threadtest.log", "w");
setvbuf(fl, NULL, _IONBF, BUFSIZ);
if (!already_done)
{
already_done = 1;
pthread_create(&test_thread, NULL, &mf_proc, NULL);
}
}
void mf_proc(void)
{
struct timeval to;
while (1)
{
fprintf(fl, "Test thread in progress\n");
to.tv_sec = 1;
to.tv_usec = 0;
select(0, NULL, NULL, NULL, &to);
}
}
------------------------------------------------------------------------------
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