[Bug 2086104] Re: bpftrace is broken on Oracular

[Athos Ribeiro]

Verifying bug with
ii  bpftrace       0.21.2-1ubuntu1 amd64

$ lxc launch ubuntu-daily:oracular bpf-oo --vm
$ lxc shell bpf-oo
# bpftrace -l '*sleep*'
: CommandLine Error: Option 'debug-counter' registered more than once!
LLVM ERROR: inconsistency in registered CommandLine options
Aborted

As expected.

Now, verifying the fix:

Enable proposed (omitted) and install bpftrace 0.21.2-1ubuntu1.1 from
oracular-proposed

# apt install bpftrace/oracular-proposed
...
# bpftrace -l '*sleep*'
kfunc:vmlinux:__bpf_prog_array_free_sleepable_cb
kfunc:vmlinux:__ia32_sys_clock_nanosleep
kfunc:vmlinux:__ia32_sys_clock_nanosleep_time32
kfunc:vmlinux:__ia32_sys_nanosleep
kfunc:vmlinux:__ia32_sys_nanosleep_time32
kfunc:vmlinux:__probestub_mm_compaction_kcompactd_sleep
....

As expected.

** Tags removed: verification-needed verification-needed-oracular
** Tags added: verification-done verification-done-oracular

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https://bugs.launchpad.net/bugs/2086104

Title:
  bpftrace is broken on Oracular

Status in bpftrace package in Ubuntu:
  Fix Released
Status in bpftrace source package in Oracular:
  Fix Committed

Bug description:
  [ Impact ]

  Running any arbitrary bpftrace commands in oracular, such as

  $ sudo bpftrace -l '*sleep*'

  fails with

  : CommandLine Error: Option 'debug-counter' registered more than once!
  LLVM ERROR: inconsistency in registered CommandLine options
  Aborted

  Making the package currently unusable there.

  [ Test Plan ]

  In an oracular fresh install, run

  $ sudo bpftrace -l '*sleep*'

  affected systems will output

  : CommandLine Error: Option 'debug-counter' registered more than once!
  LLVM ERROR: inconsistency in registered CommandLine options
  Aborted

  while a fixed system will show a list such as

  kfunc:vmlinux:__bpf_prog_array_free_sleepable_cb
  kfunc:vmlinux:__ia32_sys_clock_nanosleep
  kfunc:vmlinux:__ia32_sys_clock_nanosleep_time32
  kfunc:vmlinux:__ia32_sys_nanosleep
  ...

  Note that bpftrace is a seeded package so you will not need to install
  it to run the tests above.

  [ Where problems could occur ]

  The patch changes a CMakeLists.txt to *always* link against shared
  LLVM libraries (because that is what we want). If we saw problems, it
  would most likely be in the package build itself.

  [ Other Info ]

  This issue only affects oracular.

  Rationale for this patch explained on the bug report:
  https://github.com/bpftrace/bpftrace/issues/1855#issuecomment-2463034672

  [ Original bug report ]

  In oracular, with bpftrace version 0.21.2-1ubuntu1, when I run any
  arbitrary bpftrace command such as

  $ sudo bpftrace -l '*sleep*'

  I get the following error:

  : CommandLine Error: Option 'debug-counter' registered more than once!
  LLVM ERROR: inconsistency in registered CommandLine options
  Aborted

  Making the package currently unusable in oracular.

  Possibly related upstream bug:
  https://github.com/bpftrace/bpftrace/issues/1855

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