Re: ftp bug report

[Igor Pechtchanski <pechtcha at cs dot nyu dot edu>]

On Wed, 18 Feb 2004, Thomas Mellman wrote:

> Re: ftp crash
>   I tried to debug it with gdb but for some reason that I don't
>   understand, it hangs when run.
>
>   Nevertheless, using gdb to get the symbols (which appear to
>   be correct) and the ftp.exe.stackdump, I believe that I have
>   localized the problem to the call to dataconn() in recvrequest().
> [snip]
>   The funny thing is that the datacon() routine is in ftp.c, at
>
>   Local exec file:
>         `/opt/pub/inetutils-1.3.2-25/ftp/ftp.exe', file type pei-i386.
>         Entry point: 0x401000
>         0x00401000 - 0x0040cb04 is .text
>         0x0040d000 - 0x0040e280 is .data
>         0x0040f000 - 0x00411310 is .bss
>         0x00412000 - 0x00412ba4 is .idata
>
>   But the "entry point" for dataconn is somewhere completely different:
>
>     Exception: STATUS_ACCESS_VIOLATION at eip=610AB030
>     eax=611489F4 ebx=00000038 ecx=7070736D edx=611489F4 esi=0A045018 edi=000001B0
>     ebp=0022E9E8 esp=0022E9C8 program=D:\Programme\pub\inetutils-1.3.2-25\ftp\ftp.exe
>     cs=001B ds=0023 es=0023 fs=0038 gs=0000 ss=0023
>     Stack trace:
>     Frame     Function  Args
> [snip]
>     0022EDB8  61086211  (00401083, 00405EDB, 0A044B70, 00000001)
>
>                   ^ - dataconn?
>   recvrequest - v
>
>     0022EE88  00402E15  (00405EDB, 0A045258, 0A044B70, 00405E3C)
> [snip]
>     End of stack trace (more stack frames may be present)
>
>   Or is these frames starting at 0x22edb8 (0x61086211) some kind
>   of an interrupt?
>
>   Oh, perhaps the dataconn stack frame got lost somehow.  Anyway,
> [strace output snipped]

0x61000000 is the base address for cygwin1.dll, IIRC.
	Igor
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