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freebsd-nq/libexec
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Konstantin Belousov aef199e563 Use sigfastblock(2) in rtld. 
This allows for rtld to not issue two sigprocmask(2) syscalls for each
symbol binding operation in single-threaded processes.  Rtld needs to
block signals as part of locking to ensure signal safety of the bind
process, because signal handlers might need to lazily resolve symbol
references.

As result, number of syscalls issued on startup by simple programs not
using libthr, is typically reduced 2x.  For instance, for hello world,
I see:
non-sigfastblock
# (truss ./hello > /dev/null) |& wc -l
      63
sigfastblock
# (truss ./hello > /dev/null) |& wc -l
      37

Tested by:	pho
Disscussed with:	cem, emaste, jilles
Sponsored by:	The FreeBSD Foundation
Differential revision:	https://reviews.freebsd.org/D12773
2020-02-09 12:22:43 +00:00
..
atf Another round of attempting to squelch -Wdeprecated-declarations, which 2019-09-17 06:07:08 +00:00
atrun libexec: adoption of SPDX licensing ID tags. 2017-11-27 15:25:02 +00:00
blacklistd-helper DIRDEPS_BUILD: Connect new directories and update dependencies. 2016-06-03 19:25:30 +00:00
bootpd Restore WARNS?=1 here. I missed that libexec/bootpd/bootpgw existed. 2019-07-19 18:47:13 +00:00
comsat General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
dma Replace send-mail with the more standarized sendmail, we do not create 2017-12-27 06:23:50 +00:00
fingerd Update Makefile.depend files 2019-12-11 17:37:53 +00:00
flua flua: newer GCC complains about format-nonliteral at WARNS=2 2019-11-19 00:02:56 +00:00
ftpd Update Makefile.depend files 2019-12-11 17:37:53 +00:00
getty Simplify code with strlcpy/strlcat. 2019-12-01 08:04:22 +00:00
hyperv hyperv: Add VF bringup scripts and devd rules. 2017-07-31 07:18:15 +00:00
mail.local DIRDEPS_BUILD: Update dependencies. 2017-10-31 00:07:04 +00:00
makewhatis.local makewhatis: do not try to operate on read-only mounted directories 2018-10-27 17:15:58 +00:00
mknetid General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
pppoed libexec: adoption of SPDX licensing ID tags. 2017-11-27 15:25:02 +00:00
rbootd Fix the following -Werror warning from clang 10.0.0 in rbootd: 2020-01-28 19:19:55 +00:00
rc auditd_stop: wait_for_pids instead of sleeping 2020-02-06 08:32:30 +00:00
revnetgroup General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
rpc.rquotad This exposes ZFS user and group quotas via the normal 2018-07-05 22:56:13 +00:00
rpc.rstatd General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
rpc.rusersd General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
rpc.rwalld libexec: adoption of SPDX licensing ID tags. 2017-11-27 15:25:02 +00:00
rpc.sprayd rpc.sprayd: raise WARNS to 6 2018-03-05 16:11:07 +00:00
rtld-aout libexec: adoption of SPDX licensing ID tags. 2017-11-27 15:25:02 +00:00
rtld-elf Use sigfastblock(2) in rtld. 2020-02-09 12:22:43 +00:00
rtld-elf32 libcompat: Correct rtld MLINKS 2019-11-12 22:31:59 +00:00
save-entropy Reduce disk write load in /usr/libexec/save-entropy. 2019-11-30 20:06:53 +00:00
smrsh DIRDEPS_BUILD: Update dependencies. 2017-10-31 00:07:04 +00:00
talkd Regularize my copyright notice 2019-12-04 16:56:11 +00:00
tcpd DIRDEPS_BUILD: Update dependencies. 2017-10-31 00:07:04 +00:00
telnetd Update Makefile.depend files 2019-12-11 17:37:53 +00:00
tests Merge ^/user/ngie/release-pkg-fix-tests to unbreak how test files are installed 2016-05-04 23:20:53 +00:00
tftp-proxy DIRDEPS_BUILD: Update dependencies. 2017-10-31 00:07:04 +00:00
tftpd Update Makefile.depend files 2019-12-11 17:37:53 +00:00
ulog-helper libexec: adoption of SPDX licensing ID tags. 2017-11-27 15:25:02 +00:00
ypxfr spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
Makefile Add flua to the base system, install to /usr/libexec 2019-11-18 23:21:13 +00:00
Makefile.amd64
Makefile.i386
Makefile.inc