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Re: PATCH: stap fails if !CONFIG_FRAME_POINTER && !CONFIG_UTRACE
- From: Mark Wielaard <mjw at redhat dot com>
- To: Srikar Dronamraju <srikar at linux dot vnet dot ibm dot com>
- Cc: Tony Jones <tonyj at suse dot de>, systemtap at sources dot redhat dot com
- Date: Thu, 10 Jun 2010 13:20:51 +0200
- Subject: Re: PATCH: stap fails if !CONFIG_FRAME_POINTER && !CONFIG_UTRACE
- References: <20100609222218.GA24419@suse.de> <20100610012755.GC5878@linux.vnet.ibm.com>
On Thu, 2010-06-10 at 06:57 +0530, Srikar Dronamraju wrote:
> >
> > AFAICT the autoconf test should result in STAPCONF_UPROBE_GET_PC=0 for the
> > case where CONFIG_UTRACE is unset since UPROBES requires UTRACE.
> >
>
> Only uprobes embedded in SystemTap(i.e part of systemtap tree) has
> uprobe_get_pc. Uprobes thats part of fche's utrace-ext tree and the one
> that I post to LKML dont have uprobe_get_pc.
Is there a reason it isn't? It seems necessary for unwinding through
kretprobe instaces. See bug #11641 for example.
Cheers,
Mark