blob: a685f5cdbc6abee7466fa928f0fc1664649fa1ae (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
# Copyright (C) 2016-2023 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
# <https://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 for AT_SECURE binaries.
# Valid values are:
#
# SXID_ERASE: (default) Do not read and do not pass on to
# child processes.
# SXID_IGNORE: Do not read, but retain 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
default: 131072
}
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
minval: 0
}
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
}
hugetlb {
type: SIZE_T
minval: 0
}
}
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
minval: 0
}
skip_lock_internal_abort {
type: INT_32
default: 3
minval: 0
}
skip_lock_after_retries {
type: INT_32
default: 3
minval: 0
}
tries {
type: INT_32
default: 3
minval: 0
}
skip_trylock_internal_abort {
type: INT_32
default: 3
minval: 0
}
}
rtld {
nns {
type: SIZE_T
minval: 1
maxval: 16
default: 4
}
optional_static_tls {
type: SIZE_T
minval: 0
default: 512
}
}
mem {
tagging {
type: INT_32
minval: 0
maxval: 255
security_level: SXID_IGNORE
}
}
rtld {
dynamic_sort {
type: INT_32
minval: 1
maxval: 2
default: 2
}
}
}
|
