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/bug.h>
  17 #include <lttng/ringbuffer-config.h>
  18 #include <usterr-signal-safe.h>
  19 #include <ust-helper.h>
  20
  21 /*
  22  * The longuest possible namespace proc path is with the cgroup ns
  23  * and the maximum theoretical linux pid of 536870912 :
  24  *
  25  *  /proc/self/task/536870912/ns/cgroup
  26  */
  27 #define LTTNG_PROC_NS_PATH_MAX 40
  28
  29 struct lttng_session;
  30 struct lttng_channel;
  31 struct lttng_event;
  32 struct lttng_ctx_field;
  33 struct lttng_ust_lib_ring_buffer_ctx;
  34 struct lttng_ctx_value;
  35 struct lttng_ust_event_notifier;
  36
  37 LTTNG_HIDDEN
  38 int ust_lock(void) __attribute__ ((warn_unused_result));
  39 LTTNG_HIDDEN
  40 void ust_lock_nocheck(void);
  41 LTTNG_HIDDEN
  42 void ust_unlock(void);
  43
  44 LTTNG_HIDDEN
  45 void lttng_ust_fixup_tls(void);
  46 LTTNG_HIDDEN
  47 void lttng_fixup_event_tls(void);
  48 LTTNG_HIDDEN
  49 void lttng_fixup_vtid_tls(void);
  50 LTTNG_HIDDEN
  51 void lttng_fixup_procname_tls(void);
  52 LTTNG_HIDDEN
  53 void lttng_fixup_cgroup_ns_tls(void);
  54 LTTNG_HIDDEN
  55 void lttng_fixup_ipc_ns_tls(void);
  56 LTTNG_HIDDEN
  57 void lttng_fixup_net_ns_tls(void);
  58 LTTNG_HIDDEN
  59 void lttng_fixup_time_ns_tls(void);
  60 LTTNG_HIDDEN
  61 void lttng_fixup_uts_ns_tls(void);
  62
  63 LTTNG_HIDDEN
  64 void lttng_ust_fixup_fd_tracker_tls(void);
  65
  66 LTTNG_HIDDEN
  67 const char *lttng_ust_obj_get_name(int id);
  68
  69 LTTNG_HIDDEN
  70 int lttng_get_notify_socket(void *owner);
  71
  72 LTTNG_HIDDEN
  73 char* lttng_ust_sockinfo_get_procname(void *owner);
  74
  75 LTTNG_HIDDEN
  76 void lttng_ust_sockinfo_session_enabled(void *owner);
  77
  78 LTTNG_HIDDEN
  79 ssize_t lttng_ust_read(int fd, void *buf, size_t len);
  80
  81 LTTNG_HIDDEN
  82 size_t lttng_ust_dummy_get_size(struct lttng_ctx_field *field, size_t offset);
  83 LTTNG_HIDDEN
  84 void lttng_ust_dummy_record(struct lttng_ctx_field *field,
  85                  struct lttng_ust_lib_ring_buffer_ctx *ctx,
  86                  struct lttng_channel *chan);
  87 LTTNG_HIDDEN
  88 void lttng_ust_dummy_get_value(struct lttng_ctx_field *field,
  89                 struct lttng_ctx_value *value);
  90
  91 LTTNG_HIDDEN
  92 void lttng_event_notifier_notification_send(
  93                 struct lttng_ust_event_notifier *event_notifier,
  94                 const char *stack_data);
  95
  96 LTTNG_HIDDEN
  97 struct lttng_counter_transport *lttng_counter_transport_find(const char *name);
  98 LTTNG_HIDDEN
  99 void lttng_counter_transport_register(struct lttng_counter_transport *transport);
 100 LTTNG_HIDDEN
 101 void lttng_counter_transport_unregister(struct lttng_counter_transport *transport);
 102
 103 #ifdef HAVE_PERF_EVENT
 104 LTTNG_HIDDEN
 105 void lttng_ust_fixup_perf_counter_tls(void);
 106 LTTNG_HIDDEN
 107 void lttng_perf_lock(void);
 108 LTTNG_HIDDEN
 109 void lttng_perf_unlock(void);
 110 #else /* #ifdef HAVE_PERF_EVENT */
 111 static inline
 112 void lttng_ust_fixup_perf_counter_tls(void)
 113 {
 114 }
 115 static inline
 116 void lttng_perf_lock(void)
 117 {
 118 }
 119 static inline
 120 void lttng_perf_unlock(void)
 121 {
 122 }
 123 #endif /* #else #ifdef HAVE_PERF_EVENT */
 124
 125 #endif /* _LTTNG_TRACER_CORE_H */