liblttng-ust/lttng-tracer-core.h

   1 #ifndef _LTTNG_TRACER_CORE_H
   2 #define _LTTNG_TRACER_CORE_H
   3
   4 /*
   5  * Copyright (C) 2005-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  *
   7  * This contains the core definitions for the Linux Trace Toolkit.
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; version 2.1 of
  12  * the License.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  22  */
  23
  24 #include <stddef.h>
  25 #include <urcu/arch.h>
  26 #include <urcu/list.h>
  27 #include <lttng/ust-tracer.h>
  28 #include <lttng/bug.h>
  29 #include <lttng/ringbuffer-config.h>
  30 #include <usterr-signal-safe.h>
  31 #include <helper.h>
  32
  33 /*
  34  * The longuest possible namespace proc path is with the cgroup ns
  35  * and the maximum theoretical linux pid of 536870912 :
  36  *
  37  *  /proc/self/task/536870912/ns/cgroup
  38  */
  39 #define LTTNG_PROC_NS_PATH_MAX 40
  40
  41 struct lttng_session;
  42 struct lttng_channel;
  43 struct lttng_event;
  44 struct lttng_ctx_field;
  45 struct lttng_ust_lib_ring_buffer_ctx;
  46 struct lttng_ctx_value;
  47 struct lttng_event_notifier;
  48
  49 int ust_lock(void) __attribute__ ((warn_unused_result));
  50 void ust_lock_nocheck(void);
  51 void ust_unlock(void);
  52
  53 void lttng_fixup_event_tls(void);
  54 void lttng_fixup_vtid_tls(void);
  55 void lttng_fixup_procname_tls(void);
  56 void lttng_fixup_cgroup_ns_tls(void);
  57 void lttng_fixup_ipc_ns_tls(void);
  58 void lttng_fixup_net_ns_tls(void);
  59 void lttng_fixup_time_ns_tls(void);
  60 void lttng_fixup_uts_ns_tls(void);
  61
  62 const char *lttng_ust_obj_get_name(int id);
  63
  64 int lttng_get_notify_socket(void *owner);
  65
  66 LTTNG_HIDDEN
  67 char* lttng_ust_sockinfo_get_procname(void *owner);
  68
  69 void lttng_ust_sockinfo_session_enabled(void *owner);
  70
  71 void lttng_ust_malloc_wrapper_init(void);
  72
  73 ssize_t lttng_ust_read(int fd, void *buf, size_t len);
  74
  75 size_t lttng_ust_dummy_get_size(struct lttng_ctx_field *field, size_t offset);
  76 void lttng_ust_dummy_record(struct lttng_ctx_field *field,
  77                  struct lttng_ust_lib_ring_buffer_ctx *ctx,
  78                  struct lttng_channel *chan);
  79 void lttng_ust_dummy_get_value(struct lttng_ctx_field *field,
  80                 struct lttng_ctx_value *value);
  81 int lttng_context_is_app(const char *name);
  82 void lttng_ust_fixup_tls(void);
  83
  84 extern void (*lttng_ust_liburcu_bp_before_fork)(void);
  85 extern void (*lttng_ust_liburcu_bp_after_fork_parent)(void);
  86 extern void (*lttng_ust_liburcu_bp_after_fork_child)(void);
  87
  88 LTTNG_HIDDEN
  89 void lttng_event_notifier_notification_send(
  90                 struct lttng_event_notifier *event_notifier,
  91                 const char *stack_data);
  92
  93 #ifdef LTTNG_UST_HAVE_PERF_EVENT
  94 void lttng_ust_fixup_perf_counter_tls(void);
  95 void lttng_perf_lock(void);
  96 void lttng_perf_unlock(void);
  97 #else /* #ifdef LTTNG_UST_HAVE_PERF_EVENT */
  98 static inline
  99 void lttng_ust_fixup_perf_counter_tls(void)
 100 {
 101 }
 102 static inline
 103 void lttng_perf_lock(void)
 104 {
 105 }
 106 static inline
 107 void lttng_perf_unlock(void)
 108 {
 109 }
 110 #endif /* #else #ifdef LTTNG_UST_HAVE_PERF_EVENT */
 111
 112 #endif /* _LTTNG_TRACER_CORE_H */