From: Lukas Berk <lberk@redhat.com>
To: Holger Brunck <holger.brunck@keymile.com>
Cc: Mark Wielaard <mjw@redhat.com>, systemtap@sourceware.org
Subject: Re: print_ubacktrace() and ppc 32
Date: Tue, 06 Aug 2013 19:07:00 -0000 [thread overview]
Message-ID: <20130806190715.GA3387@redhat.com> (raw)
In-Reply-To: <51FF6667.1090404@keymile.com>
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Hey,
[...]
> no unfortunately it does not work. First I had to fix a compile error because
> "softe" is not defined for ppc_32 in the linux kernel in ptrace.h. I changed it
> temporary to "mq" in runtime/unwind/ppc_64.h and then I was able to compile my
> probe.
>
> I gave it a try with a simple main.c which calls a function foo(). My probe was:
>
> probe process("/usr/local/bin/main").function("foo")
> {
> print_ubacktrace()
> }
>
Ok
> But the output is:
> 0x10000448 : foo+0x1c/0x7c [/usr/local/bin/main]
>
> So the calling function main() was not shown on an ARM architecture a similar
> setup shows:
> 0x83b8 : foo+0x14/0x64 [/usr/local/bin/main]
> 0x8444 : main+0x3c/0x40 [/usr/local/bin/main]
>
> So there is still something missing for ppc32.
Ah too bad it wasn't a simple plug and play :) Would you mind trying
again but running your script with the added stap option
'-DDEBUG_UNWIND=99' and supplying the output? (ie, stap -DDEBUG_UNWIND=99
--ldd -ve 'probe... )
Thanks,
Lukas
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next prev parent reply other threads:[~2013-08-06 19:07 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-17 14:24 Holger Brunck
2013-06-17 17:43 ` Mark Wielaard
2013-06-17 18:00 ` Lukas Berk
2013-06-17 18:05 ` Mark Wielaard
2013-06-18 7:01 ` Holger Brunck
2013-08-03 1:12 ` Lukas Berk
2013-08-05 8:46 ` Holger Brunck
2013-08-06 19:07 ` Lukas Berk [this message]
2013-08-07 7:16 ` Holger Brunck
2013-08-09 15:21 ` Lukas Berk
2013-08-12 8:58 ` Holger Brunck
2013-06-18 6:46 ` Holger Brunck
2013-06-17 17:46 ` David Smith
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