Re: segfault in read_process_output() during vc-diff

[Tim Van Holder]

On 11/8/06, Kenichi Handa <address@hidden> wrote:
> In article <address@hidden>, address@hidden (Kim F. Storm) writes:
>
> > > bt full output:
> > >
> > > #0  0x40895af0 in bcopy () from /lib/libc.so.6
> > > No symbol table info available.
> > > #1  0x081864d4 in read_process_output (proc=143372852, channel=<value 
> optimized out>) at /home/tim/gnu/src/emacs/src/process.c:5144
> > >         odeactivate = 137457249
> > >         text = 142872947
> > >         outer_running_asynch_code = 0
> > >         waiting = -1
> > >         nbytes = <value optimized out>
>
> I want to see the value of "nbytes".  If you re-build emacs
> as below, I think you can see the value when segfault
> happens.
>
> % cd .../emacs/src
> % touch process.c
> % make CFLAGS=-g

With -g I get

(gdb) up
#1  0x0818c7ec in read_process_output (proc=142856980, channel=5) at
/home/tim/gnu/src/emacs/src/process.c:5144
5144          bcopy (chars + coding->consumed, SDATA (p->decoding_buf),
(gdb) info locals
count = 3
odeactivate = 137465089
obuffer = 140212876
waiting = -1
okeymap = 142839261
text = 143388459
outer_running_asynch_code = 0
nbytes = 1058
chars = 0xbfffd5f0 "testsuite/input/godwit/ucm/system/sources
--include=/test/testsuite/input/godwit/ucm/system/includes \\\n-
--files-from=/test/testsuite/input/godwit/ucm/system/all-sources.lst\n-\n-#
UCM - UCMP\n-set args"...
outstream = 142892721
old = (struct buffer *) 0x85b7a88
p = (struct Lisp_Process *) 0x883d310
opoint = 1869033332
coding = (struct coding_system *) 0x8841fc8
carryover = -1316
readmax = 4096