From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 5BC45388E835; Tue, 5 Jan 2021 19:46:09 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 5BC45388E835 From: "wcohen at redhat dot com" To: systemtap@sourceware.org Subject: [Bug bpf/27152] New: Missing tracepoints for for stap --bpf -L 'kernel.trace("*")' Date: Tue, 05 Jan 2021 19:46:09 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: systemtap X-Bugzilla-Component: bpf X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: wcohen at redhat dot com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: systemtap at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter target_milestone Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: systemtap@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Systemtap mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Jan 2021 19:46:09 -0000 https://sourceware.org/bugzilla/show_bug.cgi?id=3D27152 Bug ID: 27152 Summary: Missing tracepoints for for stap --bpf -L 'kernel.trace("*")' Product: systemtap Version: unspecified Status: NEW Severity: normal Priority: P2 Component: bpf Assignee: systemtap at sourceware dot org Reporter: wcohen at redhat dot com Target Milestone: --- The expectation is that both the traditional kernel module backend and bpf = back would report the same set of trace points however the following returns no tracepoints: $ ../install/bin/stap --bpf -l 'kernel.trace("*")' |wc 0 0 0 Include the --compatible=3D4.1 option and there are many tracepoints report= ed $ ../install/bin/stap --compatible=3D4.1 --bpf -l 'kernel.trace("*")' |wc 2235 16451 260254 The number of tracepoints reported is not quite as many as the traditional = stap kernel module backend: $ ../install/bin/stap -l 'kernel.trace("*")' |wc 2365 14367 232387 This was observed with locally built systemtap commit 6cb54128e005d1220a7b064ee42b9f72561c28e7 using a Fedora 32 5.9.16-100.fc32.x86_64 kernel. Looks like the search in collect_raw_tracepoint() from commit fcdd71babea2435601e5e7f8b6b5faae4a663443 is not finding the various raw tracepoints. --=20 You are receiving this mail because: You are the assignee for the bug.=