From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1253 invoked by alias); 23 Oct 2009 16:25:45 -0000 Received: (qmail 1166 invoked by uid 48); 23 Oct 2009 16:25:30 -0000 Date: Fri, 23 Oct 2009 16:25:00 -0000 From: "fche at redhat dot com" To: systemtap@sources.redhat.com Message-ID: <20091023162529.10836.fche@redhat.com> Reply-To: sourceware-bugzilla@sourceware.org Subject: [Bug uprobes/10836] New: uprobes-provided pt_regs* are unreliable X-Bugzilla-Reason: AssignedTo Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org X-SW-Source: 2009-q4/txt/msg00271.txt.bz2 Several registers appearing in a utrace-oriented pt_regs do not accurately represent the state of the user-space task. As per bug #10601, this breaks some dwarf-based $context variables. It seems to me that either uprobes should not pass pt_regs at all to its callbacks, or else populate it with synthetic (but accurate) values pulled out of utrace regset calls. (The latter would be slower and require per-arch code, but would make it more convenient for the clients. The former would be faster, and still require per-arch code at the client, but would be less convenient.) -- Summary: uprobes-provided pt_regs* are unreliable Product: systemtap Version: unspecified Status: NEW Severity: normal Priority: P2 Component: uprobes AssignedTo: systemtap at sources dot redhat dot com ReportedBy: fche at redhat dot com http://sourceware.org/bugzilla/show_bug.cgi?id=10836 ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee.