| # Copyright (C) 2016-2018 Free Software Foundation, Inc. |
| # This file is part of the GNU C Library. |
| |
| # The GNU C Library is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU Lesser General Public |
| # License as published by the Free Software Foundation; either |
| # version 2.1 of the License, or (at your option) any later version. |
| |
| # The GNU C Library is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| # Lesser General Public License for more details. |
| |
| # You should have received a copy of the GNU Lesser General Public |
| # License along with the GNU C Library; if not, see |
| # <http://www.gnu.org/licenses/>. |
| |
| # Allowed attributes for tunables: |
| # |
| # type: Defaults to STRING |
| # minval: Optional minimum acceptable value |
| # maxval: Optional maximum acceptable value |
| # env_alias: An alias environment variable |
| # security_level: Specify security level of the tunable. Valid values are: |
| # |
| # SXID_ERASE: (default) Don't read for AT_SECURE binaries and |
| # removed so that child processes can't read it. |
| # SXID_IGNORE: Don't read for AT_SECURE binaries, but retained for |
| # non-AT_SECURE subprocesses. |
| # NONE: Read all the time. |
| |
| glibc { |
| malloc { |
| check { |
| type: INT_32 |
| minval: 0 |
| maxval: 3 |
| env_alias: MALLOC_CHECK_ |
| } |
| top_pad { |
| type: SIZE_T |
| env_alias: MALLOC_TOP_PAD_ |
| security_level: SXID_IGNORE |
| } |
| perturb { |
| type: INT_32 |
| minval: 0 |
| maxval: 0xff |
| env_alias: MALLOC_PERTURB_ |
| security_level: SXID_IGNORE |
| } |
| mmap_threshold { |
| type: SIZE_T |
| env_alias: MALLOC_MMAP_THRESHOLD_ |
| security_level: SXID_IGNORE |
| } |
| trim_threshold { |
| type: SIZE_T |
| env_alias: MALLOC_TRIM_THRESHOLD_ |
| security_level: SXID_IGNORE |
| } |
| mmap_max { |
| type: INT_32 |
| env_alias: MALLOC_MMAP_MAX_ |
| security_level: SXID_IGNORE |
| } |
| arena_max { |
| type: SIZE_T |
| env_alias: MALLOC_ARENA_MAX |
| minval: 1 |
| security_level: SXID_IGNORE |
| } |
| arena_test { |
| type: SIZE_T |
| env_alias: MALLOC_ARENA_TEST |
| minval: 1 |
| security_level: SXID_IGNORE |
| } |
| tcache_max { |
| type: SIZE_T |
| } |
| tcache_count { |
| type: SIZE_T |
| } |
| tcache_unsorted_limit { |
| type: SIZE_T |
| } |
| } |
| tune { |
| hwcap_mask { |
| type: UINT_64 |
| env_alias: LD_HWCAP_MASK |
| default: HWCAP_IMPORTANT |
| } |
| } |
| |
| elision { |
| enable { |
| type: INT_32 |
| minval: 0 |
| maxval: 1 |
| } |
| skip_lock_busy { |
| type: INT_32 |
| default: 3 |
| } |
| skip_lock_internal_abort { |
| type: INT_32 |
| default: 3 |
| } |
| skip_lock_after_retries { |
| type: INT_32 |
| default: 3 |
| } |
| tries { |
| type: INT_32 |
| default: 3 |
| } |
| skip_trylock_internal_abort { |
| type: INT_32 |
| default: 3 |
| } |
| } |
| } |
