Siddhesh Poyarekar 67e58f3941 Add framework for tunables ... The tunables framework allows us to uniformly manage and expose global variables inside glibc as switches to users. tunables/README has instructions for glibc developers to add new tunables. Tunables support can be enabled by passing the --enable-tunables configure flag to the configure script. This patch only adds a framework and does not pose any limitations on how tunable values are read from the user. It also adds environment variables used in malloc behaviour tweaking to the tunables framework as a PoC of the compatibility interface. * manual/install.texi: Add --enable-tunables option. * INSTALL: Regenerate. * README.tunables: New file. * Makeconfig (CPPFLAGS): Define TOP_NAMESPACE. (before-compile): Generate dl-tunable-list.h early. * config.h.in: Add HAVE_TUNABLES. * config.make.in: Add have-tunables. * configure.ac: Add --enable-tunables option. * configure: Regenerate. * csu/init-first.c (__libc_init_first): Move __libc_init_secure earlier... * csu/init-first.c (LIBC_START_MAIN):... to here. Include dl-tunables.h, libc-internal.h. (LIBC_START_MAIN) [!SHARED]: Initialize tunables for static binaries. * elf/Makefile (dl-routines): Add dl-tunables. * elf/Versions (ld): Add __tunable_set_val to GLIBC_PRIVATE namespace. * elf/dl-support (_dl_nondynamic_init): Unset MALLOC_CHECK_ only when !HAVE_TUNABLES. * elf/rtld.c (process_envvars): Likewise. * elf/dl-sysdep.c [HAVE_TUNABLES]: Include dl-tunables.h (_dl_sysdep_start): Call __tunables_init. * elf/dl-tunable-types.h: New file. * elf/dl-tunables.c: New file. * elf/dl-tunables.h: New file. * elf/dl-tunables.list: New file. * malloc/tst-malloc-usable-static.c: New test case. * malloc/Makefile (tests-static): Add it. * malloc/arena.c [HAVE_TUNABLES]: Include dl-tunables.h. Define TUNABLE_NAMESPACE. (DL_TUNABLE_CALLBACK (set_mallopt_check)): New function. (DL_TUNABLE_CALLBACK_FNDECL): New macro. Use it to define callback functions. (ptmalloc_init): Set tunable values. * scripts/gen-tunables.awk: New file. * sysdeps/mach/hurd/dl-sysdep.c: Include dl-tunables.h. (_dl_sysdep_start): Call __tunables_init.		2016-12-31 23:49:24 +05:30
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abi-versions.awk
abilist.awk
begin-end-check.pl
build-many-glibcs.py	Make build-many-glibcs.py flush stdout before execv.	2016-12-16 16:17:13 +00:00
check-c++-types.sh	Add comments to check-c++-types.sh.	2016-12-27 14:26:05 -08:00
check-execstack.awk
check-installed-headers.sh	Make _REENTRANT and _THREAD_SAFE aliases for _POSIX_C_SOURCE=199506L.	2016-12-08 15:45:33 -05:00
check-local-headers.sh	mach: Add more allowed external headers	2016-08-21 03:24:55 +02:00
check-localplt.awk
check-textrel.awk
config-uname.sh
config.guess	Update miscellaneous files from upstream sources.	2016-12-21 16:05:55 +00:00
config.sub	Update miscellaneous files from upstream sources.	2016-12-21 16:05:55 +00:00
cpp
cross-test-ssh.sh
documented.sh
evaluate-test.sh
firstversions.awk
gen-as-const.awk
gen-libc-abis
gen-libc-modules.awk
gen-posix-conf-vars.awk
gen-py-const.awk	Add pretty printers for the NPTL lock types	2016-12-08 18:59:02 +05:30
gen-sorted.awk
gen-tunables.awk	Add framework for tunables	2016-12-31 23:49:24 +05:30
install-sh	Update miscellaneous files from upstream sources.	2016-12-21 16:05:55 +00:00
lib-names.awk
list-fixed-bugs.py
list-sources.sh
localplt.awk
merge-test-results.sh
mkinstalldirs	Update miscellaneous files from upstream sources.	2016-12-21 16:05:55 +00:00
move-if-change	Update miscellaneous files from upstream sources.	2016-12-21 16:05:55 +00:00
output-format.sed
pylint
pylintrc
rellns-sh
soversions.awk
sysd-rules.awk	sysd-rules: Cut down the number of rtld-% pattern rules	2016-09-20 10:41:05 +02:00
test_printers_common.py	scripts/test_printers_common.py: Log GDB error message	2016-12-23 15:13:28 +01:00
test_printers_exceptions.py	Add pretty printers for the NPTL lock types	2016-12-08 18:59:02 +05:30
test-installation.pl
update-abilist.sh
update-copyrights
versionlist.awk
versions.awk