* [RELEASE] LTTng-UST 2.10.7, 2.11.1, 2.12.0-rc2 (Linux user-space tracer)
@ 2020-03-04 21:27 Mathieu Desnoyers
0 siblings, 0 replies; only message in thread
From: Mathieu Desnoyers @ 2020-03-04 21:27 UTC (permalink / raw)
To: lttng-dev, diamon-discuss, linux-trace-users
Hi,
This announcement covers new releases in the two actively maintained
stable branches of the LTTng-UST project (2.10.7 and 2.11.1), as well as
the second release candidate for the 2.12 branch (2.12.0-rc2).
LTTng-UST, the Linux Trace Toolkit Next Generation Userspace Tracer,
is a low-overhead application tracer. The library "liblttng-ust" enables
tracing of applications and libraries.
* Noteworthy fixes:
All of these releases contain a fix which ensures the FD_CLOEXEC flag
is set for _all_ file descriptors received by lttng-ust over unix
socket. This fixes an issue where more file descriptors than expected
stay open over exec.
Fixes were introduced to please the address sanitizer (ASan) part of
clang-9. One documented out-of-bound access was done by jhash as an
"optimization" which was rightfully tripping ASan. Since this is
not a fast-path, the optimization was removed and we always use the
slower "valgrind-safe" code path. We also annotated the variables
emitted in the __tracepoints_ptrs to ensure ASan does not emit
redzones around those variables, which are means to be contiguous
within the section.
For the 2.10 and 2.11 branches, building with -fno-common is
enforced to prepare for the upcoming default behavior change
in gcc 10.
Please try it out, and as usual, feedback is welcome!
Thanks,
Mathieu
Project website: https://lttng.org
Documentation: https://lttng.org/docs
Download link: https://lttng.org/download
--
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2020-03-04 21:27 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-03-04 21:27 [RELEASE] LTTng-UST 2.10.7, 2.11.1, 2.12.0-rc2 (Linux user-space tracer) Mathieu Desnoyers
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).