----- On Oct 7, 2016, at 4:05 PM, Mathieu Desnoyers mathieu.desnoyers at efficios.com wrote: > We are proud to announce release candidate 1 of LTTng-UST 2.9.0. > Please test it within the coming month, and let us know if anything > goes unexpectedly before we proceed to the final release. > > 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. > > New and Noteworthy for 2.9.0-rc1: > > * Various performance improvements. Tested on x86-64 and ARM32. > * New liblttng-ust-fd helper library to deal with daemon applications > closing file descriptors that don't belong to them, e.g. loop > closing file descriptors after fork, or BSD closeall(). > * Introduce library load/unlock tracking events, which is more > precise than the dlopen/dlmopen/dlclose instrumentation we had > in lttng-ust 2.8 in cases where a dlopen'd library loads its > own dependencies. > * Tracepoints: new payload types supported: array and sequences of > integers in network byte order, > * Documentation (man pages) overhaul, > * Added support for ARM64 "aarch64_be" for some toolchains, > * Added "-ust" suffix to lttng-ust thread names, > * Introduce lttng_ust_loaded weak symbol, meant to allow applications > to detect whether lttng-ust is dynamically loaded, One more noteworthy new feature: perf counters contexts can now be used across all architectures supported by Perf. We use a read() system call on a perf file descriptor as fallback. It is slower, but works everywhere. Thanks, Mathieu > > Project website: http://lttng.org > Documentation: http://lttng.org/docs > Download link: http://lttng.org/download > > The 2.9 release "Joannès" is named after a Berliner Weisse style > beer from the Trèfle Noir microbrewery in Rouyn-Noranda. > > Changelog: > > 2016-10-07 (National Frappé Day) lttng-ust 2.9.0-rc1 > * Fix: cmake example with configure based oot build > * Fix: perform statedump before replying to sessiond > * build: check for CXX_WORKS for cmake example > * Implement liblttng-ust-fd > * Introduce file descriptor tracker > * Fix: honor send timeout on unix socket connect > * Fix: perform TLS fixup in all UST entry points from each thread > * Fix: build: pass configure flags to cmake example > * Performance: implement lttng_inline_memcpy > * Performance: mark ring buffer do_copy callers always inline > * Performance: cache the backend pages pointer in context > * Add ctx_len field to ring buffer context > * ring buffer: handle shmp errors > * Cleanup: libringbuffer: remove duplicate shmp() invocations in slow paths > * Performance: Only dereference shmp once > * Performance: Mark channel and buffer event disabled check unlikely > * Performance: Relax atomicity constraints for crash handling > * Fix: compat: -ust suffix sprintf error handling > * Performance: disable event counting by default > * Fix: remove unlock in getcpu > * Performance: remove rcu read lock from ring buffer get/put cpu > * Performance: define _LGPL_SOURCE in LGPL c files > * Performance: split check deliver fast/slow paths > * Fix: perf counters build against kernel headers < 3.12 > * Fix: perf counter context deadlock > * Fix: many-events registration/unregistration speed > * Fix: pre-fault TLS in ust-malloc instrumentation > * Fix: ust-ctl: use LTTNG_UST_HAVE_PERF_EVENT to report perf counter > availability > * Fix: reset vtid cache before releasing urcu locks > * Fix: cleanup local_apps.allowed flag on lib cleanup > * Fix: Correctly handle invalid agent port file > * Fix: memory corruption in compat.h > * Introduce lttng_ust_loaded weak symbol > * Revert "Introduce LTTNG_UST_LOADED environment variable" > * Introduce LTTNG_UST_LOADED environment variable > * Fix: remove invalid free > * Use AC_PROG_MKDIR_P (generic mkdir -p) > * Split CMake example build steps on different lines > * Fix: CMake example: specify source/built includes/libs > * configure: allow building perf support across all architectures > * Fix: use-after-free in statedump lib iter_end > * Add generic fallback for perf counter read > * Fix: perf counters: sign-extend pmc register > * doc: Add flags for JUL and python agent compiling > * tests/hello.cxx: add ctf_enum_auto() entries > * Add ctf_enum_auto() for autoincrementing enumeration values > * Add missing ust_lib.c and ust_lib.h > * dl instrumentation: add dlmopen event, trace dlopen flags > * Add library load/unload tracking events > * Communication protocol: use fixed-size integer rather than enum > * Add ustctl command to regenerate the statedump > * Implement statedump command in UST > * tests/hello.cxx: add enumeration field > * Fix: ctf_enum_value() does not work with g++ > * Fix: lttng context perf: missing stdbool.h header include > * Add perf context support for ARMv7 > * Keep perf context FD open for other architectures > * Doc: cmake example: fix coding style > * Doc: ship cmake example with 'make distcheck' > * Doc: add CMake example > * configure.ac: check cmake availability > * Only build python lib when agent is enabled > * doc: information has no plural > * Fix: allow non-LGPL modules to use tracepoints > * Add -ust to the name of UST threads of the application > * Comment the locking mechanisms in ContextInfoManager > * Fix: Null-check return value of log4j.Category.getAllAppenders() > * Add liblttng-ust-agent.jar to the .gitignore > * Fix: Specify encoding when reading agent port file > * Fix: Include child loggers in the output of "lttng list" > * Fix: Handle both agent config files pointing to same port > * Suppress static method warning > * Add more logging to the LttngTcpSessiondClient > * Use config.h to detect sched_getcpu support > * Fix: use limits.h in ust-elf test > * Fix: strerror_r behavior is glibc specific > * Add support for musl libc to ust-dlfcn.h > * Fix: don't generate 0-len array in tracepoint probes > * Fix: log4j example: set logger level to prevent unexpected level inheritance > * Fix: no LGPL define for malloc and pthread wrappers > * Fix: all lttng-ust source files should be tagged _LGPL_SOURCE > * Fix: initialize RCU callbacks with mixed LGPL/non-LGPL objects > * Fix: incorrect structure layout with mixed LGPL/non-LGPL objects > * Fix: don't call __builtin_return_address(0) on 32-bit powerpc > * Update version name TBD > * Update version to 2.9.0-pre > * Fix: tracepoint header: declare tracepoint_dlopen_ptr > * Fix: update debug message about weak-hidden symbols > * Fix: tracepoint-rcu header: use tracepoint_dlopen_ptr > * Fix: test: relax requirement on weak-hidden symbol address > * Fix: work-around gcc optimisation oddness on 32-bit powerpc > * Fix: test weak-hidden symbols > * Print DBG() message about compiler weak hidden symbol behavior > * test: add test for gcc issue with weak hidden symbol on powerpc > * Restrict Java context retriever names to a set of valid characters > * Fix: Correctly compute Java agent list loggers response size > * Add support for aarch64_be > * Fix: Fix synchronization of LTTngAgent#dispose > * Fix: Verify number of bytes contained in sessiond agent commands > * Fix: Avoid potential null dereference with log4j loggers > * Specify UTF-8 encoding for all Java agent commands > * Fix: merge tap tests stdout and stderr > * Documentation: ring buffer: SWITCH_FLUSH can be used when active > * Fix: unchecked return value in trace_clock_read64_monotonic > * Fix: portability: no arith on void pointer > * Fix: initialize build id and debug link flags to 0 > * Tests: Add tap-driver.sh for automake < 1.12 > * Fix: add "has_build_id" and "has_debug_link" fields to debuginfo events > * Tests: Replace prove by autotools tap runner > * bootstrap: Standardize on autoreconf -vi > * Harmonize bootstrap script across projects > * lttng-ust(3): order environment variables > * lttng-ust(3): fix syntax of env. variables section > * lttng-ust(3): document $LTTNG_HOME > * Fix: Java agent should use LTTNG_HOME > * Fix: examples make distcheck failure > * Cleanup: add static for internal symbols > * Cleanup: Remove unused max() macros from ring_buffer_frontend.c > * Use min_t/max_t macros in lttng-ust-elf.c > * Tests: update ust-elf tests to reflect correct memsz computation > * Fix: erroneous computation of ELF in-memory size > * Make code and man pages share the same default values > * Fix: remove NULL check of nonnull parameter in dlclose > * Tracepoint array/sequence: add nowrite hex macros > * Tracepoint: add ctf array for network byte order integers > * Tracepoint: add ctf sequence for network byte order integers > * Fix: endianness of integers received by filter > * Doc: Update README.md > * Fix: jul and log4j agents makefile missing line and indentation > * Fix: re-introduce exported symbols > * Doc: update manpages for soinfo/sopath name change > * Rename statedump and dl events and fields > * Tests: list ust-elf test data explicitly in EXTRA_DIST > * Tests: add tests for lttng_ust_elf_is_pic > * Add is_pic field to statedump soinfo event > * Fix: add common jar to lttng-ust-agent-all dependencies > * Fix: add version to lttng-ust-agent-all jar file > * Fix: rename liblttng-ust-agent to lttng-ust-agent-all > * Fix: re-add liblttng-ust-agent.jar > * Fix: lttng java agent: dispose is non-static > * doc/man: do not use macros in the NAME section > * doc/man: remove duplicate copyrights section > * doc/man: lttng-ust(3): add tracing control to example > * doc/man: lttng-ust(3): split example files in subsections > * doc/man/common-copyrights: add missing THANKS section > * doc/man: lttng-ust(3): add missing ENVIRONMENT VARIABLES section > * README.md: bolden dependencies and update links > * README.md: split required and optional dependencies > * Convert man pages to AsciiDoc > * Fix: remove dead code from filter interpreter > * Fix: convey enum value signedness into metadata > > -- > Mathieu Desnoyers > EfficiOS Inc. > http://www.efficios.com > _______________________________________________ > lttng-dev mailing list > lttng-dev at lists.lttng.org > https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com