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
  20 /*
  21  * The longuest possible namespace proc path is with the cgroup ns
  22  * and the maximum theoretical linux pid of 536870912 :
  23  *
  24  *  /proc/self/task/536870912/ns/cgroup
  25  */
  26 #define LTTNG_PROC_NS_PATH_MAX 40
  27
  28 struct lttng_ust_session;
  29 struct lttng_channel;
  30 struct lttng_event;
  31 struct lttng_ust_ctx_field;
  32 struct lttng_ust_lib_ring_buffer_ctx;
  33 struct lttng_ust_ctx_value;
  34 struct lttng_ust_event_notifier;
  35
  36 __attribute__((visibility("hidden")))
  37 int ust_lock(void) __attribute__ ((warn_unused_result));
  38
  39 __attribute__((visibility("hidden")))
  40 void ust_lock_nocheck(void);
  41
  42 __attribute__((visibility("hidden")))
  43 void ust_unlock(void);
  44
  45 __attribute__((visibility("hidden")))
  46 void lttng_ust_fixup_tls(void);
  47
  48 __attribute__((visibility("hidden")))
  49 void lttng_fixup_event_tls(void);
  50
  51 __attribute__((visibility("hidden")))
  52 void lttng_fixup_vtid_tls(void);
  53
  54 __attribute__((visibility("hidden")))
  55 void lttng_fixup_procname_tls(void);
  56
  57 __attribute__((visibility("hidden")))
  58 void lttng_fixup_cgroup_ns_tls(void);
  59
  60 __attribute__((visibility("hidden")))
  61 void lttng_fixup_ipc_ns_tls(void);
  62
  63 __attribute__((visibility("hidden")))
  64 void lttng_fixup_net_ns_tls(void);
  65
  66 __attribute__((visibility("hidden")))
  67 void lttng_fixup_time_ns_tls(void);
  68
  69 __attribute__((visibility("hidden")))
  70 void lttng_fixup_uts_ns_tls(void);
  71
  72 __attribute__((visibility("hidden")))
  73 void lttng_ust_fixup_fd_tracker_tls(void);
  74
  75 __attribute__((visibility("hidden")))
  76 const char *lttng_ust_obj_get_name(int id);
  77
  78 __attribute__((visibility("hidden")))
  79 int lttng_get_notify_socket(void *owner);
  80
  81 __attribute__((visibility("hidden")))
  82 char* lttng_ust_sockinfo_get_procname(void *owner);
  83
  84 __attribute__((visibility("hidden")))
  85 void lttng_ust_sockinfo_session_enabled(void *owner);
  86
  87 __attribute__((visibility("hidden")))
  88 ssize_t lttng_ust_read(int fd, void *buf, size_t len);
  89
  90 __attribute__((visibility("hidden")))
  91 size_t lttng_ust_dummy_get_size(struct lttng_ust_ctx_field *field, size_t offset);
  92
  93 __attribute__((visibility("hidden")))
  94 void lttng_ust_dummy_record(struct lttng_ust_ctx_field *field,
  95                  struct lttng_ust_lib_ring_buffer_ctx *ctx,
  96                  struct lttng_channel *chan);
  97 __attribute__((visibility("hidden")))
  98 void lttng_ust_dummy_get_value(struct lttng_ust_ctx_field *field,
  99                 struct lttng_ust_ctx_value *value);
 100
 101 __attribute__((visibility("hidden")))
 102 void lttng_event_notifier_notification_send(
 103                 struct lttng_ust_event_notifier *event_notifier,
 104                 const char *stack_data);
 105
 106 __attribute__((visibility("hidden")))
 107 struct lttng_counter_transport *lttng_counter_transport_find(const char *name);
 108
 109 __attribute__((visibility("hidden")))
 110 void lttng_counter_transport_register(struct lttng_counter_transport *transport);
 111
 112 __attribute__((visibility("hidden")))
 113 void lttng_counter_transport_unregister(struct lttng_counter_transport *transport);
 114
 115 #ifdef HAVE_PERF_EVENT
 116 __attribute__((visibility("hidden")))
 117 void lttng_ust_fixup_perf_counter_tls(void);
 118
 119 __attribute__((visibility("hidden")))
 120 void lttng_perf_lock(void);
 121
 122 __attribute__((visibility("hidden")))
 123 void lttng_perf_unlock(void);
 124 #else /* #ifdef HAVE_PERF_EVENT */
 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_PERF_EVENT */
 138
 139 #endif /* _LTTNG_TRACER_CORE_H */