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Willy Tarreau f0c86ddfe8 BUG/MEDIUM: debug: fix parallel thread dumps again 
The previous attempt to fix thread dumps in commit 672972604 ("BUG/MEDIUM:
debug: fix possible hang when multiple threads dump at once") still had
some shortcomings. Sometimes parallel dumps are jerky essentially due to
the way that threads synchronize on startup and end. In addition the risk
of waiting forever for a stopped thread exists, and panics happening in
parallel to thread dumps are not more reliable either.

This commit revisits the state transitions so that all threads may request
a dump in parallel, that all of them wait for each other in the handler,
and that one thread is responsible for counting every other and checking
that the total matches the number of active threads.

Then for stopping there's a finishing phase that all threads wait for so
that none quits this area too early. Given that we now know the number of
participants to the dump, we can let them each decrement the counter when
leaving so that another dump may only start after the last participant
has completely left.

Now many thread dumps in parallel are running fine, so do panics. No
backport is needed as this was the result of the changes for thread
groups.
2022-07-15 19:41:26 +02:00
.github CI: re-enable gcc asan builds 2022-07-04 17:28:58 +02:00
addons CLEANUP: applet: rename appctx_cs() to appctx_sc() 2022-05-27 19:33:35 +02:00
admin BUILD: halog: fix some incorrect signs in printf formats for integers 2022-04-12 08:40:38 +02:00
dev CLEANUP: task: remove the now unused TASK_GLOBAL flag 2022-07-01 19:15:14 +02:00
doc MINOR: task: replace task_set_affinity() with task_set_thread() 2022-07-01 19:15:14 +02:00
examples EXAMPLES: remove completely outdated acl-content-sw.cfg 2022-05-30 18:14:24 +02:00
include MINOR: mux-quic: support app graceful shutdown 2022-07-15 15:06:59 +02:00
reg-tests REGTEESTS: filters: Fix CONNECT request in random-forwarding script 2022-07-07 09:52:56 +02:00
scripts SCRIPTS: make publish-release try to launch make-releases-json 2022-05-30 15:44:10 +02:00
src BUG/MEDIUM: debug: fix parallel thread dumps again 2022-07-15 19:41:26 +02:00
tests TESTS: add a unit test for one_among_mask() 2022-06-21 20:29:57 +02:00
.cirrus.yml CI: cirrus: switch to FreeBSD-13.0 2022-04-12 07:59:06 +02:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore MINOR: qpack: implement standalone decoder tool 2022-06-15 15:42:10 +02:00
.mailmap DOC: update Tim's address in .mailmap 2021-09-16 09:14:14 +02:00
.travis.yml CI: travis-ci: temporarily disable arm64 builds 2021-08-07 07:28:15 +02:00
BRANCHES DOC: fix some spelling issues over multiple files 2021-01-08 14:53:47 +01:00
CHANGELOG [RELEASE] Released version 2.7-dev1 2022-06-24 22:09:05 +02:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2021-08-16 12:37:59 +02:00
INSTALL BUILD: Makefile: Add Lua 5.4 autodetect 2022-07-04 17:28:48 +02:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS DOC: add maintainers for QUIC and HTTP/3 2022-05-30 17:34:51 +02:00
Makefile BUILD: Makefile: Add Lua 5.4 autodetect 2022-07-04 17:28:48 +02:00
README DOC: create a BRANCHES file to explain the life cycle 2019-06-15 22:00:14 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 2.7-dev1 2022-06-24 22:09:05 +02:00
VERSION [RELEASE] Released version 2.7-dev1 2022-06-24 22:09:05 +02:00

README 

The HAProxy documentation has been split into a number of different files for
ease of use.

Please refer to the following files depending on what you're looking for :

  - INSTALL for instructions on how to build and install HAProxy
  - BRANCHES to understand the project's life cycle and what version to use
  - LICENSE for the project's license
  - CONTRIBUTING for the process to follow to submit contributions

The more detailed documentation is located into the doc/ directory :

  - doc/intro.txt for a quick introduction on HAProxy
  - doc/configuration.txt for the configuration's reference manual
  - doc/lua.txt for the Lua's reference manual
  - doc/SPOE.txt for how to use the SPOE engine
  - doc/network-namespaces.txt for how to use network namespaces under Linux
  - doc/management.txt for the management guide
  - doc/regression-testing.txt for how to use the regression testing suite
  - doc/peers.txt for the peers protocol reference
  - doc/coding-style.txt for how to adopt HAProxy's coding style
  - doc/internals for developer-specific documentation (not all up to date)