# 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

    }

    mxfast {

      type: SIZE_T

      minval: 0

      security_level: SXID_IGNORE

    }

  }

  cpu {

    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

    }

  }

  rtld {

    nns {

      type: SIZE_T

      minval: 1

      maxval: 16

      default: 4

    }

    optional_static_tls {

      type: SIZE_T

      minval: 0

      default: 512

    }

  }

}