Bug #806: Liver_timer_interval set to max uint for kernel channel with non-initilized live_timer session - LTTng-tools - LTTng bugs repository

Actions

Copy link

Bug #806

closed

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

Added by Jonathan Rajotte almost 10 years ago. Updated almost 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