more segfaults (sqlite this time)

[Paul J Stevens]

Alas,

I think the va_copy trick is spot on, but it should also be applied in
SQLiteConnection_execute and friends, if I read stdarg(3) correctly.


Jan-Henrik Haukeland wrote:
> I have a feeling or rather hope that it all boils down to a trivial  
> error in StringBuffer. Could you try again with the latest from svn?
> 
> On 5. april. 2008, at 20.27, Paul J Stevens wrote:
>> Jan-Henrik Haukeland wrote:
>>> Could you try and create a test program that reproduce this and the
>>> MySQL error you previously reported. I have not seen these problems
>>> before myself. I don't know if you do, but notice that sharing a
>>> Connection, PreparedStatement or ResultSet between threads is not
>>> thread-safe and will open a can of worms.
>> That I dont do, afaik. I always fetch a connection, execute, handle
>> result, and return the connection within a single thread. I will  
>> double
>> check, but I've hardly begun using threads so there's not many  
>> places to
>> look. Also, the postgres driver is much more stable at the moment. I'm
>> still seeing some crashes there as well, but those are few and very  
>> far
>> between, but also point to Connection_clear.
>>
>>
>>
>>>
>>> On 5. april. 2008, at 16.59, Paul J Stevens wrote:
>>>> Dont shoot the messenger plz :-)
>>>>
>>>> running some tests using sqlite I'm getting what appears to be stack
>>>> corruption:
>>>>
>>>>
>>>>
>>>> (gdb) bt
>>>> #0  0xffffe410 in __kernel_vsyscall ()
>>>> #1  0xb78cbf75 in raise () from /lib/tls/i686/cmov/libc.so.6
>>>> #2  0xb78cd8f1 in abort () from /lib/tls/i686/cmov/libc.so.6
>>>> #3  0xb7d01b95 in Util_abort (e=0xb7d102a0 "MemoryException -- %s at
>>>> %s
>>>> in line %d\n") at src/util/Util.c:83
>>>> #4  0xb7d023d2 in Mem_resize (p=0x5316e008, size=1665138688,
>>>> file=0xb7d214c0 "src/util/StringBuffer.c", line=61) at src/util/
>>>> Mem.c:76
>>>> #5  0xb7d07c29 in StringBuffer_vappend (S=0x8115438, s=0x81008c0
>>>> "UPDATE
>>>> OR IGNORE dbmail_mailboxes SET mtime=STRFTIME('%Y-%m-%d
>>>> %H:%M:%S','now','localtime') WHERE mailbox_idnr=2",
>>>>   ap=0xbfe38778 "{z\t\b��\t\b�") at src/util/StringBuffer.c:61
>>>> #6  0xb7d0e88f in SQLiteConnection_execute (C=0x8115de8,  
>>>> sql=0x81008c0
>>>> "UPDATE OR IGNORE dbmail_mailboxes SET mtime=STRFTIME('%Y-%m-%d
>>>> %H:%M:%S','now','localtime') WHERE mailbox_idnr=2",
>>>>   ap=0xbfe38778 "{z\t\b��\t\b�") at src/db/sqlite/
>>>> SQLiteConnection.c:174
>>>>
>>>>
>>>>
>>>> any ideas?
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>>
>> -- 
>>  ________________________________________________________________
>>  Paul Stevens                                      paul at nfg.nl
>>  NET FACILITIES GROUP                     GPG/PGP: 1024D/11F8CD31
>>  The Netherlands________________________________http://www.nfg.nl
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> 
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-- 
  ________________________________________________________________
  Paul Stevens                                      paul at nfg.nl
  NET FACILITIES GROUP                     GPG/PGP: 1024D/11F8CD31
  The Netherlands________________________________http://www.nfg.nl