Re: [sqlite] Help: Required help/guidance for the segmentation fault in sqlite3 library to proceed further...
On Fri, Sep 24, 2010 at 9:50 AM, Pavel Ivanov wrote: > Apparently you are calling sqlite3_free twice on the same statement > pointer. Try to add assigning to NULL after freeing and checking for > NULL before freeing. > The second step (checking for NULL before freeing) is unnecessary. Calling sqlite3_free() on a NULL pointer is defined to be a safe and harmless no-op. > > > Pavel > > On Thu, Sep 23, 2010 at 10:57 AM, Borra, Kishore Babu > wrote: > > Hi, > > > > I require some help in getting the fix for some memory corruption issues, > occurring while using the sqlite3 library. It would be very helpful, if you > can guide to fix the below issues or atleast provide some info on this, to > minimize the memory corruption, occurring mostly while sqlite3_free or doing > some query. > > > > Thanks, > > Kishore > > > > The below backtraces observed for crash are- > > > > 1. #0 0x0feb1a98 in raise () from /lib/libc.so.6 > > #1 0x0feb3418 in abort () from /lib/libc.so.6 > > #2 0x0fee847c in __libc_message () from /lib/libc.so.6 > > #3 0x0feef5ec in malloc_printerr () from /lib/libc.so.6 > > #4 0x0fef0244 in free () from /lib/libc.so.6 > > #5 0x0fc1f0d8 in dbi_result_free () from /usr/local/lib/libdbi.so.0 > > #6 0x0fc97d00 in FreeDBIResult (result=0x1037ec88) at dbInterface.c:1008 > > #7 0x1003ebc4 in FillDartInfo (nodeType=975170328, HmpDataLocalCopy=0x2) > at configMgrPollDartGnrl.c:424 > > #8 0x10037820 in ConfigManagerPollerThread () at configManager.c:490 > > #9 0x0fd35d38 in start_thread () from /lib/libpthread.so.0 > > #10 0x0ff45f44 in clone () from /lib/libc.so.6 > > Backtrace stopped: previous frame inner to this frame (corrupt stack?) > > > > > > 2. *** glibc detected *** agent/.libs/lt-snmpd: corrupted double-linked > list: 0x08310c18 *** > > === Backtrace: = > > /lib/i686/cmov/libc.so.6[0xb7af9624] > > /lib/i686/cmov/libc.so.6[0xb7afb557] > > /lib/i686/cmov/libc.so.6(cfree+0x96)[0xb7afb826] > > /usr/local/lib/libsqlite3.so.0[0xb788a330] > > /usr/local/lib/libsqlite3.so.0(sqlite3_free+0x69)[0xb78547b9] > > /usr/local/lib/libsqlite3.so.0[0xb785628a] > > /usr/local/lib/libsqlite3.so.0[0xb7856539] > > /usr/local/lib/libsqlite3.so.0[0xb785677c] > > /usr/local/lib/libsqlite3.so.0[0xb7862613] > > /usr/local/lib/libsqlite3.so.0[0xb7862648] > > /usr/local/lib/libsqlite3.so.0[0xb7875a8a] > > /usr/local/lib/libsqlite3.so.0[0xb7875d24] > > /usr/local/lib/libsqlite3.so.0[0xb787a22a] > > /usr/local/lib/libsqlite3.so.0[0xb789c3ba] > > /usr/local/lib/libsqlite3.so.0(sqlite3_step+0x57)[0xb78907c7] > > /usr/local/lib/libsqlite3.so.0(sqlite3_exec+0xf7)[0xb7890bd7] > > /usr/local/lib/libsqlite3.so.0(sqlite3_get_table+0xd8)[0xb7890f68] > > /usr/local/lib/dbd//libdbdsqlite3.so(dbd_query+0x45)[0xb792b215] > > /usr/lib/libdbi.so.0(dbi_conn_query+0x4b)[0xb79123fb] > > > /home/kishore/prism_N5Dev7.0/Dev7.0/libs/dbInterface/installable/usr/local/lib/libdbInterface.so.1(ExcecuteSelectQuery+0x17f)[0xb793531f] > > /home/kishore/prism_N5Dev7 > > > > > > Sqlite version details are as follows:- > > > > Sqlite3 Library using are Sqlite-3.6.23.1 > > Library - libsqlite3.so.0.8.6 > > > > Using libdbi as wrappers- > > libdbi drivers - 0.8.2.1 version. On top of sq1lite3. > > Libdbi -0.8.3 version > > > > > > ___ > > sqlite-users mailing list > > sqlite-users@sqlite.org > > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > > > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > -- D. Richard Hipp d...@sqlite.org ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Help: Required help/guidance for the segmentation fault in sqlite3 library to proceed further...
On Sep 23, 2010, at 9:57 PM, Borra, Kishore Babu wrote: > Hi, > > I require some help in getting the fix for some memory corruption > issues, occurring while using the sqlite3 library. It would be very > helpful, if you can guide to fix the below issues or atleast provide > some info on this, to minimize the memory corruption, occurring > mostly while sqlite3_free or doing some query. Run your app under valgrind: http://www.valgrind.org/ ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Help: Required help/guidance for the segmentation fault in sqlite3 library to proceed further...
Apparently you are calling sqlite3_free twice on the same statement pointer. Try to add assigning to NULL after freeing and checking for NULL before freeing. Pavel On Thu, Sep 23, 2010 at 10:57 AM, Borra, Kishore Babu wrote: > Hi, > > I require some help in getting the fix for some memory corruption issues, > occurring while using the sqlite3 library. It would be very helpful, if you > can guide to fix the below issues or atleast provide some info on this, to > minimize the memory corruption, occurring mostly while sqlite3_free or doing > some query. > > Thanks, > Kishore > > The below backtraces observed for crash are- > > 1. #0 0x0feb1a98 in raise () from /lib/libc.so.6 > #1 0x0feb3418 in abort () from /lib/libc.so.6 > #2 0x0fee847c in __libc_message () from /lib/libc.so.6 > #3 0x0feef5ec in malloc_printerr () from /lib/libc.so.6 > #4 0x0fef0244 in free () from /lib/libc.so.6 > #5 0x0fc1f0d8 in dbi_result_free () from /usr/local/lib/libdbi.so.0 > #6 0x0fc97d00 in FreeDBIResult (result=0x1037ec88) at dbInterface.c:1008 > #7 0x1003ebc4 in FillDartInfo (nodeType=975170328, HmpDataLocalCopy=0x2) at > configMgrPollDartGnrl.c:424 > #8 0x10037820 in ConfigManagerPollerThread () at configManager.c:490 > #9 0x0fd35d38 in start_thread () from /lib/libpthread.so.0 > #10 0x0ff45f44 in clone () from /lib/libc.so.6 > Backtrace stopped: previous frame inner to this frame (corrupt stack?) > > > 2. *** glibc detected *** agent/.libs/lt-snmpd: corrupted double-linked list: > 0x08310c18 *** > === Backtrace: = > /lib/i686/cmov/libc.so.6[0xb7af9624] > /lib/i686/cmov/libc.so.6[0xb7afb557] > /lib/i686/cmov/libc.so.6(cfree+0x96)[0xb7afb826] > /usr/local/lib/libsqlite3.so.0[0xb788a330] > /usr/local/lib/libsqlite3.so.0(sqlite3_free+0x69)[0xb78547b9] > /usr/local/lib/libsqlite3.so.0[0xb785628a] > /usr/local/lib/libsqlite3.so.0[0xb7856539] > /usr/local/lib/libsqlite3.so.0[0xb785677c] > /usr/local/lib/libsqlite3.so.0[0xb7862613] > /usr/local/lib/libsqlite3.so.0[0xb7862648] > /usr/local/lib/libsqlite3.so.0[0xb7875a8a] > /usr/local/lib/libsqlite3.so.0[0xb7875d24] > /usr/local/lib/libsqlite3.so.0[0xb787a22a] > /usr/local/lib/libsqlite3.so.0[0xb789c3ba] > /usr/local/lib/libsqlite3.so.0(sqlite3_step+0x57)[0xb78907c7] > /usr/local/lib/libsqlite3.so.0(sqlite3_exec+0xf7)[0xb7890bd7] > /usr/local/lib/libsqlite3.so.0(sqlite3_get_table+0xd8)[0xb7890f68] > /usr/local/lib/dbd//libdbdsqlite3.so(dbd_query+0x45)[0xb792b215] > /usr/lib/libdbi.so.0(dbi_conn_query+0x4b)[0xb79123fb] > /home/kishore/prism_N5Dev7.0/Dev7.0/libs/dbInterface/installable/usr/local/lib/libdbInterface.so.1(ExcecuteSelectQuery+0x17f)[0xb793531f] > /home/kishore/prism_N5Dev7 > > > Sqlite version details are as follows:- > > Sqlite3 Library using are Sqlite-3.6.23.1 > Library - libsqlite3.so.0.8.6 > > Using libdbi as wrappers- > libdbi drivers - 0.8.2.1 version. On top of sq1lite3. > Libdbi -0.8.3 version > > > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
