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From: "me at serhei dot io" <sourceware-bugzilla@sourceware.org>
To: systemtap@sourceware.org
Subject: [Bug bpf/25177] New: stap --bpf -c does not work as specified
Date: Fri, 08 Nov 2019 15:58:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D25177

            Bug ID: 25177
           Summary: stap --bpf -c does not work as specified
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: bpf
          Assignee: systemtap at sourceware dot org
          Reporter: me at serhei dot io
  Target Milestone: ---

With test.stp:

probe begin {
  printf("BEGIN\n")
}

probe process("/opt/stap-master/bin/stap").function("main") {
  printf("found it\n")
  exit()
}

probe end {
  printf("END PASS\n")
}


$ sudo /opt/stap-master/bin/stap test.stp -c '/opt/stap-master/bin/stap -V'
Systemtap translator/driver (version 4.2/0.174, commit
release-4.1-100-ga8c7c8f114fa + changes)
Copyright (C) 2005-2019 Red Hat, Inc. and others
This is free software; see the source for copying conditions.
tested kernel versions: 2.6.18 ... 5.1-rc2
enabled features: AVAHI BOOST_STRING_REF DYNINST BPF JAVA PYTHON2 PYTHON3
LIBRPM LIBSQLITE3 LIBVIRT LIBXML2 NLS NSS READLINE
BEGIN
found it
END PASS

But the same invocation with --bpf does not launch the command:

$ sudo /opt/stap-master/bin/stap test.stp -c '/opt/stap-master/bin/stap -V'
--bpf
BEGIN
...

--=20
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