Message-ID: <007101bf76c3$a4572ca0$293f8589@gv015029.bgo.nera.no>
From: "Gisle Vanem" <gvanem AT eunet DOT no>
To: <djgpp AT delorie DOT com>
Subject: Re: Help in porting wget
Date: Mon, 14 Feb 2000 09:15:10 +0100
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Reply-To: djgpp AT delorie DOT com

Doug Kaufman <dkaufman AT rahul DOT net> said:


>is. Since I am not a programmer, I think I need some help interpreting
>the crashback. The symified crashback follow:
>
>270056/1270056]
> 
>TCP/IP shutdown: Segmentation violation
>Exiting due to signal SIGABRT


Watt-32 installs signal-handlers for SIGSEGV and others. This handler
sends the SIGABRT signal (via raise (SIGABRT)). The reg-dump and 
trace-back should be (via some tricks) the same as if not trapping 
SIGSEGV ourself.

>Page fault at eip=0004c539, error=0004
>eax=00000008 ebx=00000000 ecx=00000000 edx=00000000 esi=00067f2c edi=00000008
>ebp=000f0558 esp=000f054c program=F:\WGET1\WGET-1.5-3\SRC\WGET.EXE
>cs: sel=00e7  base=10310000  limit=0012ffff
>ds: sel=00ef  base=10310000  limit=0012ffff
>es: sel=00ef  base=10310000  limit=0012ffff
>fs: sel=00ff  base=00000000  limit=0010ffff
>gs: sel=00ff  base=00000000  limit=0010ffff
>ss: sel=00ef  base=10310000  limit=0012ffff
>App stack: [000f06d8..000706d8]  Exceptn stack: [000700e0..0006e1a0]
> 
>Call frame traceback EIPs:
>  0x0004c539 _free+77


Crashes in free() is most certainly caused by trashing memory allocated
by malloc(), calloc() or strdup(). Watch for overwrites of blocks allocated
by those functions.

>  0x0001721b _freeurl+199, line 349 of url.c
>  0x000168cc _retrieve_url+896, line 420 of retr.c
>  0x00015184 _recursive_retrieve+2196, line 411 of recur.c
>  0x00012eb4 _main+3360, line 700 of main.c
>  0x0004951e ___crt1_startup+178


This is just the call-sequence in reverse. Probably main() called
recursive_retrieve() which called retrieve_url() etc.

Gisle V.