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Bug #830

enable-event command reports an error when successfully adding a probe

Added by Jérémie Galarneau over 5 years ago. Updated over 5 years ago.

Status:
Resolved
Priority:
Low
Assignee:
-
Target version:
Start date:
08/21/2014
Due date:
% Done:

100%

Estimated time:

Description

"lttng enable-event -k test2 --probe sys_read+0x0" reports an error even though a probe was added successfully. The error message is not printed in "MI" mode.

$ lttng --mi xml enable-event -k test --probe sys_read+0x0 
<?xml version="1.0" encoding="UTF-8"?>
<command><name>enable-event</name><output><events><event><name>test</name><type>PROBE</type><enabled>true</enabled><filter>false</filter><offset>0</offset><symbol_name>sys_read</symbol_name><success>true</success></event></events></output><success>true</success></command>

$ lttng  enable-event -k test2 --probe sys_read+0x0 
Kernel event test2 created in channel channel0
Error: Undefined command

$ lttng list auto-20140821-164128
Tracing session auto-20140821-164128: [inactive]
    Trace path: /home/julien/lttng-traces/auto-20140821-164128

=== Domain: Kernel ===

Channels:
-------------
- channel0: [enabled]

    Attributes:
      overwrite mode: 0
      subbufers size: 262144
      number of subbufers: 4
      switch timer interval: 0
      read timer interval: 200000
      trace file count: 0
      trace file size (bytes): 0
      output: splice()

    Events:
      test2 (type: probe) [enabled]
        offset: 0x0
        symbol: sys_read
      test (type: probe) [enabled]
        offset: 0x0
        symbol: sys_read
#1

Updated by Jonathan Rajotte over 5 years ago

Target version is not the good one. v2.5.0 is not affected by the bug.

And in bonus see patch for resolution:
http://lists.lttng.org/pipermail/lttng-dev/2014-August/023468.html

#2

Updated by Jérémie Galarneau over 5 years ago

  • Target version changed from 2.5 to 2.4
#3

Updated by Jonathan Rajotte over 5 years ago

  • Status changed from New to Resolved
  • % Done changed from 0 to 100

Applied in changeset tools|commit:fbdb7e15cbe6235cadaaa7c1b2213f128e747e47.

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