On Fri, Oct 12, 2012 at 5:23 PM, David Korn <d...@research.att.com> wrote:
[CC:'ing ast-developers@ so that others can help with debugging, too]
> cc: olga.kryzhanov...@gmail.com g...@research.att.com
> Subject: Re: Crash in shpiano.sh demo with ast-ksh.2012-10-04...
> --------
>
> I don't have /dev/audio on my linux system and I don't have root permission.
Erm... most Unix/Linux audio applications which use /dev/audio honor
the AUDIODEV env variable...
... AFAIK this should work in your case for debugging:
-- snip --
$ AUDIODEV=/dev/null ~/bin/ksh shpiano.sh
-- snip --
... and then press some keys like 'd', 'e', 'f' ...
> Maybe you can get some information that will help from the core dump.
>
> What is sh.inlineno?
See below...
> What is *np?
Se below...
> what is *ap
See below...
I switched to a Solaris 11/SPARC machine for better debugging
abilities and to ast-ksh.2012-10-12...
... basically the crash looks like this:
-- snip --
program terminated by signal SEGV (no mapping at the fault address)
Current function is bestreclaim
401 list = LINK(list);
/**/ASSERT(!vmonlist(list,fp));
(dbx) where
=>[1] bestreclaim(vd = 0x10039b4a8, wanted = (nil), c = 1), line 401
in "vmbest.c"
[2] bestalloc(vm = 0x10039b520, size = 32U, local = 1), line 661 in "vmbest.c"
[3] _ast_malloc(size = 17U), line 521 in "malloc.c"
[4] nv_putval(np = 0xffffffff7c701980, string = 0xffffffff7e81503a
"tones[G3]", flags = 0), line 1939 in "name.c"
[5] nv_open(name = 0xffffffff7e815030 "curr_note=tones[G3]", root =
0xffffffff7e81dff0, flags = 8929920), line 1525 in "name.c"
[6] sh_setlist(shp = 0x100396dc0, arg = 0xffffffff7c5281e0, flags =
8929920, typ = (nil)), line 592 in "name.c"
[7] sh_exec(shp = 0x100396dc0, t = 0xffffffff7c528180, flags = 4),
line 1135 in "xec.c"
[8] sh_exec(shp = 0x100396dc0, t = 0xffffffff7c528380, flags = 4),
line 2159 in "xec.c"
[9] sh_exec(shp = 0x100396dc0, t = 0xffffffff7c528010, flags = 4),
line 2478 in "xec.c"
[10] sh_exec(shp = 0x100396dc0, t = 0xffffffff7c529a70, flags = 4),
line 2159 in "xec.c"
[11] sh_exec(shp = 0x100396dc0, t = 0xffffffff7c527a10, flags = 4),
line 2402 in "xec.c"
[12] sh_exec(shp = 0x100396dc0, t = 0xffffffff7c529f50, flags = 6),
line 2159 in "xec.c"
[13] sh_funscope_20120720(shp = 0x100396dc0, argn = 1, argv =
0xffffffff7e814128, fun = (nil), arg = 0xffffffff7ffff1e8, execflg =
4), line 3980 in "xec.c"
[14] sh_funct(shp = 0x100396dc0, np = 0xffffffff7e91c0c0, argn = 1,
argv = 0xffffffff7e814128, envlist = (nil), execflg = 4), line 3297 in
"xec.c"
[15] sh_exec(shp = 0x100396dc0, t = 0xffffffff7e8140c0, flags = 4),
line 1514 in "xec.c"
[16] exfile(shp = 0x100396dc0, iop = 0xffffffff7e81fbf0, fno = 11),
line 582 in "main.c"
[17] sh_main(ac = 2, av = 0xffffffff7ffffa88, userinit = (nil)),
line 354 in "main.c"
[18] main(argc = 2, argv = 0xffffffff7ffffa88), line 45 in "pmain.c"
(dbx) print sh.inlineno
sh.inlineno = 1433
(dbx) up
Current function is bestalloc
661 { bestreclaim(vd,NIL(Block_t*),n);
(dbx) up
Current function is _ast_malloc
521 addr = (*vm->meth.allocf)(vm, size, local);
(dbx) up
Current function is nv_putval
1939 cp =
(char*)malloc(((unsigned)dot+8));
(dbx) print np
np = 0xffffffff7c701980
(dbx) print *np
*np = {
nvlink = {
rh = {
__rght = 0xffffffff7c52c040
__ptbl = 0xffffffff7c52c040
}
lh = {
__left = 0xffffffff7c52bfe0
__hash = 4294967295U
}
}
nvname = 0xffffffff7c7019c0 "curr_note"
pad1 = 0
nvflag = 0
nvsize = 0
nvfun = (nil)
nvalue = {
cp = (nil)
ip = (nil)
c = '\0'
i = 0
u = 0
lp = (nil)
idp = (nil)
llp = (nil)
s = 0
sp = (nil)
dp = (nil)
ldp = (nil)
array = (nil)
np = (nil)
up = (nil)
rp = (nil)
funp = (nil)
nrp = (nil)
bfp = (nil)
}
nvshell = 0x100396dc0
nvenv = (nil)
}
(dbx) print ap
ap = 0x3d
(dbx) print *ap
dbx: cannot access address 0x3d
-- snip --
Does that help somehow ?
----
Bye,
Roland
--
__ . . __
(o.\ \/ /.o) roland.ma...@nrubsig.org
\__\/\/__/ MPEG specialist, C&&JAVA&&Sun&&Unix programmer
/O /==\ O\ TEL +49 641 3992797
(;O/ \/ \O;)
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