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[Bug uprobes/10836] uprobes-provided pt_regs* are unreliable
- From: "fche at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 28 Oct 2009 16:56:20 -0000
- Subject: [Bug uprobes/10836] uprobes-provided pt_regs* are unreliable
- References: <20091023162529.10836.fche@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From fche at redhat dot com 2009-10-28 16:56 -------
(In reply to comment #6)
> [...] For the registers that SystemTap actually references, would the pointer
> provided by task_pt_regs() be sufficient?
For sake of print_regs(), unwinding, or general dwarf-based (eg. fbreg-relative)
$context variable access, it looks like utrace signal pt_regs == task_pt_regs ==
not accurate. So we do have a pervasive problem.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=10836
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