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* [Bug bpf/27820] New: abort() tapset not implemented in the bpf mode
@ 2021-05-04  4:34 agentzh at gmail dot com
  2021-07-14 16:23 ` [Bug bpf/27820] " me at serhei dot io
  2021-07-19 15:55 ` me at serhei dot io
  0 siblings, 2 replies; 3+ messages in thread
From: agentzh at gmail dot com @ 2021-05-04  4:34 UTC (permalink / raw)
  To: systemtap

https://sourceware.org/bugzilla/show_bug.cgi?id=27820

            Bug ID: 27820
           Summary: abort() tapset not implemented in the bpf mode
           Product: systemtap
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: bpf
          Assignee: systemtap at sourceware dot org
          Reporter: agentzh at gmail dot com
  Target Milestone: ---

To demonstrate:

```
$ /opt/stap/bin/stap --bpf -e 'probe begin { abort() }'
ERROR: abort() not supported in eBPF backend
```

More info:

```
$ /opt/stap/bin/stap -V
Systemtap translator/driver (version 4.5/0.183, commit
release-4.4-145-g8ae1d1dcec48)
Copyright (C) 2005-2020 Red Hat, Inc. and others
This is free software; see the source for copying conditions.
tested kernel versions: 2.6.32 ... 5.12.0-rc
enabled features: BPF
```

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* [Bug bpf/27820] abort() tapset not implemented in the bpf mode
  2021-05-04  4:34 [Bug bpf/27820] New: abort() tapset not implemented in the bpf mode agentzh at gmail dot com
@ 2021-07-14 16:23 ` me at serhei dot io
  2021-07-19 15:55 ` me at serhei dot io
  1 sibling, 0 replies; 3+ messages in thread
From: me at serhei dot io @ 2021-07-14 16:23 UTC (permalink / raw)
  To: systemtap

https://sourceware.org/bugzilla/show_bug.cgi?id=27820

Serhei Makarov <me at serhei dot io> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |me at serhei dot io

--- Comment #1 from Serhei Makarov <me at serhei dot io> ---
commit 371805aa0 adds abort() implementation which will terminate the currently
running probe, unlike exit()

A more stringent implementation would eliminate the delay between the probe
exiting and stapbpf unloading the other probes, but at the cost of adding a
global variable check to the start of every stapbpf probe. Uncertain that this
is necessary (since even the stringent implementation does not terminate
parallel probes).

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* [Bug bpf/27820] abort() tapset not implemented in the bpf mode
  2021-05-04  4:34 [Bug bpf/27820] New: abort() tapset not implemented in the bpf mode agentzh at gmail dot com
  2021-07-14 16:23 ` [Bug bpf/27820] " me at serhei dot io
@ 2021-07-19 15:55 ` me at serhei dot io
  1 sibling, 0 replies; 3+ messages in thread
From: me at serhei dot io @ 2021-07-19 15:55 UTC (permalink / raw)
  To: systemtap

https://sourceware.org/bugzilla/show_bug.cgi?id=27820

Serhei Makarov <me at serhei dot io> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #2 from Serhei Makarov <me at serhei dot io> ---
Thinking about this more, I believe the implementation I pushed works well
enough to close this PR.

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^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2021-07-19 15:55 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2021-05-04  4:34 [Bug bpf/27820] New: abort() tapset not implemented in the bpf mode agentzh at gmail dot com
2021-07-14 16:23 ` [Bug bpf/27820] " me at serhei dot io
2021-07-19 15:55 ` me at serhei dot io

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