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[Bug kprobes/2152] jprobe variant to run handler instead of probed function
- From: "suparna at in dot ibm dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 17 Jan 2006 06:04:46 -0000
- Subject: [Bug kprobes/2152] jprobe variant to run handler instead of probed function
- References: <20060113232600.2152.jkenisto@us.ibm.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From suparna at in dot ibm dot com 2006-01-17 06:04 -------
Subject: Re: jprobe variant to run handler instead of probed function
On Mon, Jan 16, 2006 at 05:26:29PM -0000, anil dot s dot keshavamurthy at intel dot com wrote:
>
> ------- Additional Comments From anil dot s dot keshavamurthy at intel dot com 2006-01-16 17:26 -------
> > Probably just calling "return" instead of "jprobe_return" from the jprobe
> > handler would do the trick ?
> You can't do that(at least in the current design) as jprobe_handler are
> executed with preempt disabled and current_kprobe set to this probe. Hence
True. Thanks for spotting that.
> jprobe_handler() _must_ execute jprobe_return(), so that Kprobe code can
> reverse the preempt count and clear current_kprobe.
>
>
>
> --
>
>
> http://sourceware.org/bugzilla/show_bug.cgi?id=2152
>
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