[lttng-dev] [RELEASE] LTTng-UST 2.12.3 and 2.11.5 (Linux user-space tracer)

[Mathieu Desnoyers]

----- On Jan 5, 2022, at 4:27 PM, Mathieu Desnoyers mathieu.desnoyers at efficios.com wrote:

> Hi,
> 
> This is a release announcement for the LTTng-UST 2.12.3 and 2.11.5
> tracer. Those are bug fix releases.
> 
> The 2.11.5 release marks the end of life (EOL) of the stable-2.11 branch.
> Users experiencing issues with the 2.11 branch are expected to upgrade to
> either 2.12.3 or 2.13.1.
> 
> Note that the latest stable branch is 2.13 (its most recent release
> is 2.13.1, released on December 10, 2021).
> 
> * Notable changes in 2.12.3:
> 
> Two notable fixes are "Fix: nestable pthread cancelstate" and
> "Fix: abort on decrement_sem_count during concurrent tracing start and
> teardown",
> which fix a rare deadlock scenario at application exit.

Just as a clarification, the second fix corrects a race scenario triggering an
assertion failure.

Thanks,

MAthieu

> 
> Another notable fix is "fix: liblttng-ust-fd async-signal-safe close()", which
> ensures that the implementation of the symbol interposition for "close" is
> async-signal safe, as it should be.
> 
> Please refer to the change logs below for the fixes contained in those
> two releases.
> 
> Feedback is welcome,
> 
> Thanks,
> 
> Mathieu
> 
> Project website: https://lttng.org
> Documentation: https://lttng.org/docs
> Download link: https://lttng.org/download
> 
> 
> 2022-01-05 (National Bird Day) lttng-ust 2.12.3
>        * Fix: ust-cancelstate: include string.h for strerror
>        * Fix: lttng-ust-fd: remove lttng_ust_common_ctor call
>        * Fix: nestable pthread cancelstate
>        * Fix: abort on decrement_sem_count during concurrent tracing start and teardown
>        * fix: liblttng-ust-fd async-signal-safe close()
>        * Set git-review branch to stable-2.12
>        * fix: link benchmark with pthread
>        * Fix: liblttng-ust-ctl have dependencies on liburcu
>        * Fix: add extern "C" to two header files
> 
> 2022-01-05 (National Bird Day) lttng-ust 2.11.5
>        * Set git-review branch to stable-2.11
>        * fix: allow building with userspace-rcu 0.13
> 
> --
> Mathieu Desnoyers
> EfficiOS Inc.
> http://www.efficios.com

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com