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authorSiddhesh Poyarekar <siddhesh@sourceware.org>2016-12-31 23:33:27 +0530
committerSiddhesh Poyarekar <siddhesh@sourceware.org>2016-12-31 23:49:24 +0530
commit9dd409a5f4a7a053cc962f8371dad0fe5cc22597 (patch)
treea205733e557ccf0b66021deff34cd6b690150f9e /math/w_coshl.c
parent67e58f39412ecd4467034761f3f074283c90f3c8 (diff)
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Initialize tunable list with the GLIBC_TUNABLES environment variable
Read tunables values from the users using the GLIBC_TUNABLES
environment variable.  The value of this variable is a colon-separated
list of name=value pairs.  So a typical string would look like this:

GLIBC_TUNABLES=glibc.malloc.mmap_threshold=2048:glibc.malloc.trim_threshold=1024

	* config.make.in (have-loop-to-function): Define.
	* elf/Makefile (CFLAGS-dl-tunables.c): Add
	-fno-tree-loop-distribute-patterns.
	* elf/dl-tunables.c: Include libc-internals.h.
	(GLIBC_TUNABLES): New macro.
	(tunables_strdup): New function.
	(parse_tunables): New function.
	(min_strlen): New function.
	(__tunables_init): Use the new functions and macro.
	(disable_tunable): Disable tunable from GLIBC_TUNABLES.
	* malloc/tst-malloc-usable-tunables.c: New test case.
	* malloc/tst-malloc-usable-static-tunables.c: New test case.
	* malloc/Makefile (tests, tests-static): Add tests.
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