2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * 2015 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 #include <common/macros.h>
26 /* Default unix group name for tracing. */
27 #define DEFAULT_TRACING_GROUP "tracing"
30 * This value is defined in the CTF specification (see
31 * git://git.efficios.com/ctf.git in the file
32 * common-trace-format-specification.txt.
34 #define DEFAULT_METADATA_NAME "metadata"
36 /* Environment variable to set session daemon binary path. */
37 #define DEFAULT_SESSIOND_PATH_ENV "LTTNG_SESSIOND_PATH"
39 /* Environment variable to set man pager binary path. */
40 #define DEFAULT_MAN_BIN_PATH_ENV "LTTNG_MAN_BIN_PATH"
42 /* Default man pager binary path. */
43 #define DEFAULT_MAN_BIN_PATH "/usr/bin/man"
45 /* Default trace output directory name */
46 #define DEFAULT_TRACE_DIR_NAME "lttng-traces"
48 /* Default size of a hash table */
49 #define DEFAULT_HT_SIZE 4
51 /* Default session daemon paths */
52 #define DEFAULT_HOME_DIR "/tmp"
53 #define DEFAULT_UST_SOCK_DIR DEFAULT_HOME_DIR "/ust-app-socks"
54 #define DEFAULT_GLOBAL_APPS_PIPE DEFAULT_UST_SOCK_DIR "/global"
55 #define DEFAULT_TRACE_OUTPUT DEFAULT_HOME_DIR "/lttng"
57 /* Default directory where the trace are written in per domain */
58 #define DEFAULT_KERNEL_TRACE_DIR "/kernel"
59 #define DEFAULT_UST_TRACE_DIR "/ust"
61 /* Subpath for per PID or UID sessions. */
62 #define DEFAULT_UST_TRACE_PID_PATH "/pid"
63 #define DEFAULT_UST_TRACE_UID_PATH "/uid/%d/%u-bit"
66 * Default session name for the lttng command line. This default value will
67 * get the date and time appended (%Y%m%d-%H%M%S) to it.
69 #define DEFAULT_SESSION_NAME "auto"
71 /* Default consumer paths */
72 #define DEFAULT_CONSUMERD_FILE "lttng-consumerd"
74 /* Default consumer paths */
75 #define DEFAULT_CONSUMERD_RUNDIR "%s"
77 /* Kernel consumer path */
78 #define DEFAULT_KCONSUMERD_PATH DEFAULT_CONSUMERD_RUNDIR "/kconsumerd"
79 #define DEFAULT_KCONSUMERD_CMD_SOCK_PATH DEFAULT_KCONSUMERD_PATH "/command"
80 #define DEFAULT_KCONSUMERD_ERR_SOCK_PATH DEFAULT_KCONSUMERD_PATH "/error"
82 /* UST 64-bit consumer path */
83 #define DEFAULT_USTCONSUMERD64_PATH DEFAULT_CONSUMERD_RUNDIR "/ustconsumerd64"
84 #define DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH DEFAULT_USTCONSUMERD64_PATH "/command"
85 #define DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH DEFAULT_USTCONSUMERD64_PATH "/error"
87 /* UST 32-bit consumer path */
88 #define DEFAULT_USTCONSUMERD32_PATH DEFAULT_CONSUMERD_RUNDIR "/ustconsumerd32"
89 #define DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH DEFAULT_USTCONSUMERD32_PATH "/command"
90 #define DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH DEFAULT_USTCONSUMERD32_PATH "/error"
93 #define DEFAULT_RELAYD_RUNDIR "%s"
94 #define DEFAULT_RELAYD_PATH DEFAULT_RELAYD_RUNDIR "/relayd"
96 /* Default lttng run directory */
97 #define DEFAULT_LTTNG_HOME_ENV_VAR "LTTNG_HOME"
98 #define DEFAULT_LTTNG_FALLBACK_HOME_ENV_VAR "HOME"
99 #define DEFAULT_LTTNG_RUNDIR CONFIG_LTTNG_SYSTEM_RUNDIR
100 #define DEFAULT_LTTNG_HOME_RUNDIR "%s/.lttng"
101 #define DEFAULT_LTTNG_SESSIOND_PIDFILE "lttng-sessiond.pid"
102 #define DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE "agent.port"
103 #define DEFAULT_LTTNG_SESSIOND_LOCKFILE "lttng-sessiond.lck"
105 /* Default probes list */
106 #define DEFAULT_LTTNG_KMOD_PROBES "LTTNG_KMOD_PROBES"
108 /* Default extra probes list */
109 #define DEFAULT_LTTNG_EXTRA_KMOD_PROBES "LTTNG_EXTRA_KMOD_PROBES"
111 /* Default unix socket path */
112 #define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/client-lttng-sessiond"
113 #define DEFAULT_HOME_CLIENT_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/client-lttng-sessiond"
114 #define DEFAULT_GLOBAL_HEALTH_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/sessiond-health"
115 #define DEFAULT_HOME_HEALTH_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/sessiond-health"
116 #define DEFAULT_GLOBAL_NOTIFICATION_CHANNEL_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/sessiond-notification"
117 #define DEFAULT_HOME_NOTIFICATION_CHANNEL_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/sessiond-notification"
119 /* Default consumer health unix socket path */
120 #define DEFAULT_GLOBAL_USTCONSUMER32_HEALTH_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/ustconsumerd32/health"
121 #define DEFAULT_HOME_USTCONSUMER32_HEALTH_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/ustconsumerd32/health"
122 #define DEFAULT_GLOBAL_USTCONSUMER64_HEALTH_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/ustconsumerd64/health"
123 #define DEFAULT_HOME_USTCONSUMER64_HEALTH_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/ustconsumerd64/health"
124 #define DEFAULT_GLOBAL_KCONSUMER_HEALTH_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/kconsumerd/health"
125 #define DEFAULT_HOME_KCONSUMER_HEALTH_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/kconsumerd/health"
127 /* Default relay health unix socket path */
128 #define DEFAULT_GLOBAL_RELAY_HEALTH_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/relayd/health-%d"
129 #define DEFAULT_HOME_RELAY_HEALTH_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/relayd/health-%d"
131 /* Default daemon configuration file path */
132 #define DEFAULT_SYSTEM_CONFIGPATH CONFIG_LTTNG_SYSTEM_CONFIGDIR \
135 #define DEFAULT_DAEMON_CONFIG_FILE "lttng.conf"
136 #define DEFAULT_DAEMON_HOME_CONFIGPATH DEFAULT_LTTNG_HOME_RUNDIR "/" \
137 DEFAULT_DAEMON_CONFIG_FILE
138 #define DEFAULT_DAEMON_SYSTEM_CONFIGPATH DEFAULT_SYSTEM_CONFIGPATH "/" \
139 DEFAULT_DAEMON_CONFIG_FILE
141 /* Default session configuration file path */
142 #define DEFAULT_SESSION_PATH "sessions"
143 /* Auto load session in that directory. */
144 #define DEFAULT_SESSION_CONFIG_AUTOLOAD "auto"
145 #define DEFAULT_SESSION_HOME_CONFIGPATH DEFAULT_LTTNG_HOME_RUNDIR "/" \
147 #define DEFAULT_SESSION_SYSTEM_CONFIGPATH DEFAULT_SYSTEM_CONFIGPATH "/" \
149 #define DEFAULT_SESSION_CONFIG_FILE_EXTENSION ".lttng"
150 #define DEFAULT_SESSION_CONFIG_XSD_FILENAME "session.xsd"
151 #define DEFAULT_SESSION_CONFIG_XSD_PATH CONFIG_LTTNG_SYSTEM_DATADIR "/xml/lttng/"
152 #define DEFAULT_SESSION_CONFIG_XSD_PATH_ENV "LTTNG_SESSION_CONFIG_XSD_PATH"
154 #define DEFAULT_GLOBAL_APPS_UNIX_SOCK \
155 DEFAULT_LTTNG_RUNDIR "/" LTTNG_UST_SOCK_FILENAME
156 #define DEFAULT_HOME_APPS_UNIX_SOCK \
157 DEFAULT_LTTNG_HOME_RUNDIR "/" LTTNG_UST_SOCK_FILENAME
158 #define DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH \
159 "/" LTTNG_UST_WAIT_FILENAME
160 #define DEFAULT_HOME_APPS_WAIT_SHM_PATH \
161 DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH "-%d"
164 * Value taken from the hard limit allowed by the kernel when using setrlimit
165 * with RLIMIT_NOFILE on an Intel i7 CPU and Linux 3.0.3.
167 #define DEFAULT_POLL_SIZE 65535
170 * Format is %s_%d respectively channel name and CPU number. Eigth bytes
171 * are added here to add space for the CPU number. I guess 2^8 CPUs is more
172 * than enough. We might end up with quantum computing in a cell phone when
173 * reaching this limit.
175 #define DEFAULT_STREAM_NAME_LEN LTTNG_SYMBOL_NAME_LEN + 8
177 /* Default channel attributes */
178 #define DEFAULT_CHANNEL_NAME "channel0"
179 /* Default JUL domain channel name. */
180 #define DEFAULT_JUL_CHANNEL_NAME "lttng_jul_channel"
181 /* Default JUL tracepoint name. This is a wildcard for the JUL domain. */
182 #define DEFAULT_JUL_EVENT_COMPONENT "lttng_jul"
183 #define DEFAULT_JUL_EVENT_NAME DEFAULT_JUL_EVENT_COMPONENT ":*"
185 /* Default log4j domain channel name. */
186 #define DEFAULT_LOG4J_CHANNEL_NAME "lttng_log4j_channel"
187 /* Default log4j tracepoint name. This is a wildcard for the log4j domain. */
188 #define DEFAULT_LOG4J_EVENT_COMPONENT "lttng_log4j"
189 #define DEFAULT_LOG4J_EVENT_NAME DEFAULT_LOG4J_EVENT_COMPONENT ":*"
191 /* Default Python domain channel name. */
192 #define DEFAULT_PYTHON_CHANNEL_NAME "lttng_python_channel"
193 /* Default Python tracepoint name. This is a wildcard for the python domain. */
194 #define DEFAULT_PYTHON_EVENT_COMPONENT "lttng_python"
195 #define DEFAULT_PYTHON_EVENT_NAME DEFAULT_PYTHON_EVENT_COMPONENT ":*"
197 #define DEFAULT_CHANNEL_OVERWRITE -1
198 #define DEFAULT_CHANNEL_TRACEFILE_SIZE CONFIG_DEFAULT_CHANNEL_TRACEFILE_SIZE
199 #define DEFAULT_CHANNEL_TRACEFILE_COUNT CONFIG_DEFAULT_CHANNEL_TRACEFILE_COUNT
201 #define _DEFAULT_CHANNEL_SUBBUF_SIZE CONFIG_DEFAULT_CHANNEL_SUBBUF_SIZE
202 #define _DEFAULT_CHANNEL_OUTPUT LTTNG_EVENT_MMAP
204 /* Metadata channel defaults. */
205 #define DEFAULT_METADATA_SUBBUF_SIZE CONFIG_DEFAULT_METADATA_SUBBUF_SIZE
206 #define DEFAULT_METADATA_SUBBUF_NUM CONFIG_DEFAULT_METADATA_SUBBUF_NUM
207 #define DEFAULT_METADATA_CACHE_SIZE CONFIG_DEFAULT_METADATA_CACHE_SIZE
208 #define DEFAULT_METADATA_SWITCH_TIMER CONFIG_DEFAULT_METADATA_SWITCH_TIMER
209 #define DEFAULT_METADATA_READ_TIMER CONFIG_DEFAULT_METADATA_READ_TIMER
210 #define DEFAULT_METADATA_OUTPUT _DEFAULT_CHANNEL_OUTPUT
212 /* Kernel has different defaults */
214 /* DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
215 #define DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE CONFIG_DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE
217 * DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM must always be a power of 2.
218 * Update help manually if override.
220 #define DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM CONFIG_DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM
221 /* See lttng-kernel.h enum lttng_kernel_output for channel output */
222 #define DEFAULT_KERNEL_CHANNEL_OUTPUT LTTNG_EVENT_SPLICE
223 #define DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER CONFIG_DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER
224 #define DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER CONFIG_DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER
225 #define DEFAULT_KERNEL_CHANNEL_READ_TIMER CONFIG_DEFAULT_KERNEL_CHANNEL_READ_TIMER
226 #define DEFAULT_KERNEL_CHANNEL_LIVE_TIMER CONFIG_DEFAULT_KERNEL_CHANNEL_LIVE_TIMER
227 #define DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT CONFIG_DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT
229 /* User space defaults */
231 /* Must be a power of 2 */
232 #define DEFAULT_UST_PID_CHANNEL_SUBBUF_SIZE CONFIG_DEFAULT_UST_PID_CHANNEL_SUBBUF_SIZE
233 #define DEFAULT_UST_UID_CHANNEL_SUBBUF_SIZE CONFIG_DEFAULT_UST_UID_CHANNEL_SUBBUF_SIZE
234 /* Must be a power of 2. Update help manuall if override. */
235 #define DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM CONFIG_DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM
236 #define DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM CONFIG_DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM
237 /* See lttng-ust.h enum lttng_ust_output */
238 #define DEFAULT_UST_PID_CHANNEL_OUTPUT _DEFAULT_CHANNEL_OUTPUT
239 #define DEFAULT_UST_UID_CHANNEL_OUTPUT _DEFAULT_CHANNEL_OUTPUT
240 /* Timers in usec. */
241 #define DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER CONFIG_DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER
242 #define DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER CONFIG_DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER
243 #define DEFAULT_UST_PID_CHANNEL_LIVE_TIMER CONFIG_DEFAULT_UST_PID_CHANNEL_LIVE_TIMER
244 #define DEFAULT_UST_UID_CHANNEL_LIVE_TIMER CONFIG_DEFAULT_UST_UID_CHANNEL_LIVE_TIMER
245 #define DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER CONFIG_DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER
246 #define DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER CONFIG_DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER
248 #define DEFAULT_UST_PID_CHANNEL_READ_TIMER CONFIG_DEFAULT_UST_PID_CHANNEL_READ_TIMER
249 #define DEFAULT_UST_UID_CHANNEL_READ_TIMER CONFIG_DEFAULT_UST_UID_CHANNEL_READ_TIMER
251 #define DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT CONFIG_DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT
252 #define DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT CONFIG_DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT
255 * Default timeout value for the sem_timedwait() call. Blocking forever is not
256 * wanted so a timeout is used to control the data flow and not freeze the
259 #define DEFAULT_SEM_WAIT_TIMEOUT 30 /* in seconds */
261 /* Default bind addresses for network services. */
262 #define DEFAULT_NETWORK_CONTROL_BIND_ADDRESS CONFIG_DEFAULT_NETWORK_CONTROL_BIND_ADDRESS
263 #define DEFAULT_NETWORK_DATA_BIND_ADDRESS CONFIG_DEFAULT_NETWORK_DATA_BIND_ADDRESS
264 #define DEFAULT_NETWORK_VIEWER_BIND_ADDRESS CONFIG_DEFAULT_NETWORK_VIEWER_BIND_ADDRESS
265 #define DEFAULT_AGENT_BIND_ADDRESS CONFIG_DEFAULT_AGENT_BIND_ADDRESS
267 /* Default network ports for trace streaming support. */
268 #define DEFAULT_NETWORK_CONTROL_PORT CONFIG_DEFAULT_NETWORK_CONTROL_PORT
269 #define DEFAULT_NETWORK_DATA_PORT CONFIG_DEFAULT_NETWORK_DATA_PORT
270 #define DEFAULT_NETWORK_VIEWER_PORT CONFIG_DEFAULT_NETWORK_VIEWER_PORT
272 /* Agent registration TCP port. */
273 #define DEFAULT_AGENT_TCP_PORT CONFIG_DEFAULT_AGENT_TCP_PORT
276 * If a thread stalls for this amount of time, it will be considered bogus (bad
279 #define DEFAULT_HEALTH_CHECK_DELTA_S 20
280 #define DEFAULT_HEALTH_CHECK_DELTA_NS 0
283 * Wait period before retrying the lttng_data_pending command in the lttng
284 * stop command of liblttng-ctl.
286 #define DEFAULT_DATA_AVAILABILITY_WAIT_TIME 200000 /* usec */
289 * Wait period before retrying the lttng_consumer_flushed_cache when
290 * the consumer receives metadata.
292 #define DEFAULT_METADATA_AVAILABILITY_WAIT_TIME 200000 /* usec */
295 * The usual value for the maximum TCP SYN retries time and TCP FIN timeout is
296 * 180 and 60 seconds on most Linux system and the default value since kernel
297 * 2.2 thus using the highest value. See tcp(7) for more details.
299 #define DEFAULT_INET_TCP_TIMEOUT 180 /* sec */
302 * Default receiving and sending timeout for an application socket.
304 #define DEFAULT_APP_SOCKET_RW_TIMEOUT CONFIG_DEFAULT_APP_SOCKET_RW_TIMEOUT
305 #define DEFAULT_APP_SOCKET_TIMEOUT_ENV "LTTNG_APP_SOCKET_TIMEOUT"
307 #define DEFAULT_UST_STREAM_FD_NUM 2 /* Number of fd per UST stream. */
309 #define DEFAULT_SNAPSHOT_NAME "snapshot"
310 #define DEFAULT_SNAPSHOT_MAX_SIZE 0 /* Unlimited. */
312 /* Suffix of an index file. */
313 #define DEFAULT_INDEX_FILE_SUFFIX ".idx"
314 #define DEFAULT_INDEX_DIR "index"
316 /* Default lttng command live timer value in usec. */
317 #define DEFAULT_LTTNG_LIVE_TIMER CONFIG_DEFAULT_LTTNG_LIVE_TIMER
319 /* Default runas worker name */
320 #define DEFAULT_RUN_AS_WORKER_NAME "lttng-runas"
322 /* Default LTTng MI XML namespace. */
323 #define DEFAULT_LTTNG_MI_NAMESPACE "http://lttng.org/xml/ns/lttng-mi"
325 /* Default thread stack size; the default mandated by pthread_create(3) */
326 #define DEFAULT_LTTNG_THREAD_STACK_SIZE 2097152
328 /* Default maximal size of message notification channel message payloads. */
329 #define DEFAULT_MAX_NOTIFICATION_CLIENT_MESSAGE_PAYLOAD_SIZE 65536
331 /* Default maximal size of message notification channel message payloads. */
332 #define DEFAULT_CLIENT_MAX_QUEUED_NOTIFICATIONS_COUNT 100
335 #define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE"
336 #define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_IDLE_TIME_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE_IDLE_TIME"
337 #define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_MAX_PROBE_COUNT_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE_MAX_PROBE_COUNT"
338 #define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_PROBE_INTERVAL_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE_PROBE_INTERVAL"
339 #define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_ABORT_THRESHOLD_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE_ABORT_THRESHOLD"
342 * Returns the default subbuf size.
344 * This function depends on a value that is set at constructor time, so it is
345 * unsafe to call it from another constructor.
348 size_t default_get_channel_subbuf_size(void);
351 * Returns the default metadata subbuf size.
353 * This function depends on a value that is set at constructor time, so it is
354 * unsafe to call it from another constructor.
357 size_t default_get_metadata_subbuf_size(void);
360 * Returns the default subbuf size for the kernel domain.
362 * This function depends on a value that is set at constructor time, so it is
363 * unsafe to call it from another constructor.
366 size_t default_get_kernel_channel_subbuf_size(void);
369 * Returns the default subbuf size for the UST domain per PID.
371 * This function depends on a value that is set at constructor time, so it is
372 * unsafe to call it from another constructor.
375 size_t default_get_ust_pid_channel_subbuf_size(void);
378 * Returns the default subbuf size for the UST domain per UID.
380 * This function depends on a value that is set at constructor time, so it is
381 * unsafe to call it from another constructor.
384 size_t default_get_ust_uid_channel_subbuf_size(void);
387 * Get the default pthread_attr to use on thread creation.
389 * Some libc, such as musl, don't honor the limit set for the stack size and use
390 * their own empirically chosen static value. This function checks if the
391 * current stack size is smaller than the stack size limit and if so returns a
392 * pthread_attr_t pointer where the thread stack size is set to the soft stack
396 pthread_attr_t
*default_pthread_attr(void);
398 #endif /* _DEFAULTS_H */
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