liblttng-ust/lttng-tracer-core.h

   1 /*
   2  * SPDX-License-Identifier: LGPL-2.1-only
   3  *
   4  * Copyright (C) 2005-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  *
   6  * This contains the core definitions for the Linux Trace Toolkit.
   7  */
   8
   9 #ifndef _LTTNG_TRACER_CORE_H
  10 #define _LTTNG_TRACER_CORE_H
  11
  12 #include <stddef.h>
  13 #include <urcu/arch.h>
  14 #include <urcu/list.h>
  15 #include <lttng/ust-tracer.h>
  16 #include <lttng/ringbuffer-context.h>
  17 #include <usterr-signal-safe.h>
  18
  19 /*
  20  * The longuest possible namespace proc path is with the cgroup ns
  21  * and the maximum theoretical linux pid of 536870912 :
  22  *
  23  *  /proc/self/task/536870912/ns/cgroup
  24  */
  25 #define LTTNG_PROC_NS_PATH_MAX 40
  26
  27 struct lttng_ust_session;
  28 struct lttng_ust_channel_buffer;
  29 struct lttng_ust_ctx_field;
  30 struct lttng_ust_lib_ring_buffer_ctx;
  31 struct lttng_ust_ctx_value;
  32 struct lttng_ust_event_recorder;
  33 struct lttng_ust_event_notifier;
  34 struct lttng_ust_notification_ctx;
  35
  36 int ust_lock(void) __attribute__ ((warn_unused_result))
  37         __attribute__((visibility("hidden")));
  38
  39 void ust_lock_nocheck(void)
  40         __attribute__((visibility("hidden")));
  41
  42 void ust_unlock(void)
  43         __attribute__((visibility("hidden")));
  44
  45 void lttng_ust_fixup_tls(void)
  46         __attribute__((visibility("hidden")));
  47
  48 void lttng_fixup_event_tls(void)
  49         __attribute__((visibility("hidden")));
  50
  51 void lttng_fixup_vtid_tls(void)
  52         __attribute__((visibility("hidden")));
  53
  54 void lttng_fixup_procname_tls(void)
  55         __attribute__((visibility("hidden")));
  56
  57 void lttng_fixup_cgroup_ns_tls(void)
  58         __attribute__((visibility("hidden")));
  59
  60 void lttng_fixup_ipc_ns_tls(void)
  61         __attribute__((visibility("hidden")));
  62
  63 void lttng_fixup_net_ns_tls(void)
  64         __attribute__((visibility("hidden")));
  65
  66 void lttng_fixup_time_ns_tls(void)
  67         __attribute__((visibility("hidden")));
  68
  69 void lttng_fixup_uts_ns_tls(void)
  70         __attribute__((visibility("hidden")));
  71
  72 void lttng_ust_fixup_fd_tracker_tls(void)
  73         __attribute__((visibility("hidden")));
  74
  75 const char *lttng_ust_obj_get_name(int id)
  76         __attribute__((visibility("hidden")));
  77
  78 int lttng_get_notify_socket(void *owner)
  79         __attribute__((visibility("hidden")));
  80
  81 char* lttng_ust_sockinfo_get_procname(void *owner)
  82         __attribute__((visibility("hidden")));
  83
  84 void lttng_ust_sockinfo_session_enabled(void *owner)
  85         __attribute__((visibility("hidden")));
  86
  87 ssize_t lttng_ust_read(int fd, void *buf, size_t len)
  88         __attribute__((visibility("hidden")));
  89
  90 size_t lttng_ust_dummy_get_size(void *priv, size_t offset)
  91         __attribute__((visibility("hidden")));
  92
  93 void lttng_ust_dummy_record(void *priv, struct lttng_ust_lib_ring_buffer_ctx *ctx,
  94                  struct lttng_ust_channel_buffer *chan)
  95         __attribute__((visibility("hidden")));
  96
  97 void lttng_ust_dummy_get_value(void *priv, struct lttng_ust_ctx_value *value)
  98         __attribute__((visibility("hidden")));
  99
 100 void lttng_event_notifier_notification_send(
 101                 struct lttng_ust_event_notifier *event_notifier,
 102                 const char *stack_data,
 103                 struct lttng_ust_notification_ctx *notif_ctx)
 104         __attribute__((visibility("hidden")));
 105
 106 struct lttng_counter_transport *lttng_counter_transport_find(const char *name)
 107         __attribute__((visibility("hidden")));
 108
 109 void lttng_counter_transport_register(struct lttng_counter_transport *transport)
 110         __attribute__((visibility("hidden")));
 111
 112 void lttng_counter_transport_unregister(struct lttng_counter_transport *transport)
 113         __attribute__((visibility("hidden")));
 114
 115 #ifdef HAVE_LINUX_PERF_EVENT_H
 116 void lttng_ust_fixup_perf_counter_tls(void)
 117         __attribute__((visibility("hidden")));
 118
 119 void lttng_perf_lock(void)
 120         __attribute__((visibility("hidden")));
 121
 122 void lttng_perf_unlock(void)
 123         __attribute__((visibility("hidden")));
 124 #else /* #ifdef HAVE_LINUX_PERF_EVENT_H */
 125 static inline
 126 void lttng_ust_fixup_perf_counter_tls(void)
 127 {
 128 }
 129 static inline
 130 void lttng_perf_lock(void)
 131 {
 132 }
 133 static inline
 134 void lttng_perf_unlock(void)
 135 {
 136 }
 137 #endif /* #else #ifdef HAVE_LINUX_PERF_EVENT_H */
 138
 139 #endif /* _LTTNG_TRACER_CORE_H */