Re: I'm having a crashing problem with FreeTDS under OSX

Hi James,

	here is the first little bit of the stack trace for the first crash  
I'm seeing.

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000016
0x0010f7fa in free ()
(gdb) bt
#0  0x0010f7fa in free ()
#1  0x02f55c38 in _SQLAllocEnv (phenv=0x812c70) at odbc.c:1353
#2  0x02f5621c in SQLAllocHandle (HandleType=1, InputHandle=0x2c76488,  
OutputHandle=0x812c70) at odbc.c:1254
#3  0x02dfa147 in _iodbcdm_driverload ()
#4  0x02dfe579 in SQLConnect_Internal ()
#5  0x02dfecf0 in SQLConnect ()
#6  0x02dc82c6 in dbc_connect (argc=4587520, argv=0x460000,  
self=43728580) at odbc.c:1963
#7  0x000166d5 in call_cfunc (func=0x2dc8100 <dbc_connect>,  
recv=43728580, len=<value temporarily unavailable, due to  
optimizations>, argc=3, argv=0xbfff41e0) at eval.c:5715
#8  0x0001fdc2 in rb_call0 (klass=43929420, recv=43728580, id=2961,  
oid=2961, argc=-1073790732, argv=0xbfff41e0, body=0x29e3de0,  
flags=<value temporarily unavailable, due to optimizations>) at eval.c: 
5870
#9  0x000209cc in rb_call (klass=43929420, recv=43728580, mid=2961,  
argc=3, argv=0xbfff41e0, scope=1, self=6) at eval.c:6117
#10 0x00021462 in rb_obj_call_init (obj=4587520, argc=4587520,  
argv=0x460000) at eval.c:7650
#11 0x02dc8b97 in dbc_new (argc=3, argv=0xbfff41e0, self=43929600) at  
odbc.c:1875
#12 0x02dc8c1b in mod_connect (argc=4587520, argv=0x460000,  
self=4587520) at odbc.c:7119
#13 0x000166d5 in call_cfunc (func=0x2dc8bf0 <mod_connect>,  
recv=43929600, len=<value temporarily unavailable, due to  
optimizations>, argc=43728580, argv=0x3) at eval.c:5715
#14 0x0001fdc2 in rb_call0 (klass=43927460, recv=43929600, id=49409,  
oid=49409, argc=0, argv=0xbfff41e0, body=0x29e46f0, flags=<value  
temporarily unavailable, due to optimizations>) at eval.c:5870
#15 0x000209cc in rb_call (klass=43927460, recv=43929600, mid=49409,  
argc=3, argv=0xbfff41e0, scope=0, self=43729280) at eval.c:6117

I'm using the 0.82 release of FreeTDS and the following is the version  
line from /usr/include/sql.h

  *  $Id: sql.h,v 1.9 2006/01/20 15:58:34 source Exp $

A while ago I started making a Ruby extension that talked to the  
FreeTDS library directly.  Maybe now is the time to finally finish it  
off  and make it work with Rails ;)


Daniel


On 06/03/2009, at 2:16 AM, James K. Lowden wrote:

> Daniel Parnell wrote:
>> Unfortunately when I try to connect to SQL Server using the ODBC mode
>> of FreeTDS I get bus errors whenever it calls free :(
>>
>> I've done quite a bit of googling to see if I can find any  
>> information
>> about this problem, and finally decided to ask here.  Is this a known
>> problem, and if so is there a fix for it?
>
> What exactly is the error?  Do you have a line number and source file
> name?  Which versions of sql.h and FreeTDS are you using?
>
> 64-bit ODBC can be a challenge due to 32-bit assumptions baked into  
> the
> ODBC API.  It sounds like somewhere you're trimming off the high  
> word of a
> pointer.  I would engage Google with that in mind.
>
> HTH.
>
> --jkl
>
>
> _______________________________________________
> FreeTDS mailing list
> [email protected]
> http://lists.ibiblio.org/mailman/listinfo/freetds