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Bug #806

closed

Liver_timer_interval set to max uint for kernel channel with non-initilized live_timer session

Added by Jonathan Rajotte over 10 years ago. Updated over 10 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
-
Target version:
LTTng - 2.5
Start date:
06/17/2014
Due date:
% Done:

100%

Estimated time:

Description

To reproduce:
(with kernel tracing available)

lttng create test
lttng enable-channel testChan -k

(For comparison)
lttng enable-channel testChanUst -u

lttng save -a

The resulting XML reveal a bug for the liver_timer_interval propagation from session to a kernel channel. The live_timer_interval from the kernel channel(testChan) is not overwrite by the live_timer from the session and take the max uint value(4294967295). As discussed with David Goulet on irc, this might be a case of uninitialized variable.

On the other hand to propagation for UST channel is okay as seen in the XML.

David Goulet found a possible reason but with source code modification it seems this is not the problem. See attached patch.

Files

Download all files
test.lttng (1.63 KB) test.lttng Jonathan Rajotte, 06/17/2014 09:24 AM
wrong_uint_int_conversion.patch (879 Bytes) wrong_uint_int_conversion.patch Jonathan Rajotte, 06/17/2014 09:24 AM
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