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_channel;
  29 struct lttng_event;
  30 struct lttng_ust_ctx_field;
  31 struct lttng_ust_lib_ring_buffer_ctx;
  32 struct lttng_ust_ctx_value;
  33 struct lttng_ust_event_notifier;
  34
  35 __attribute__((visibility("hidden")))
  36 int ust_lock(void) __attribute__ ((warn_unused_result));
  37
  38 __attribute__((visibility("hidden")))
  39 void ust_lock_nocheck(void);
  40
  41 __attribute__((visibility("hidden")))
  42 void ust_unlock(void);
  43
  44 __attribute__((visibility("hidden")))
  45 void lttng_ust_fixup_tls(void);
  46
  47 __attribute__((visibility("hidden")))
  48 void lttng_fixup_event_tls(void);
  49
  50 __attribute__((visibility("hidden")))
  51 void lttng_fixup_vtid_tls(void);
  52
  53 __attribute__((visibility("hidden")))
  54 void lttng_fixup_procname_tls(void);
  55
  56 __attribute__((visibility("hidden")))
  57 void lttng_fixup_cgroup_ns_tls(void);
  58
  59 __attribute__((visibility("hidden")))
  60 void lttng_fixup_ipc_ns_tls(void);
  61
  62 __attribute__((visibility("hidden")))
  63 void lttng_fixup_net_ns_tls(void);
  64
  65 __attribute__((visibility("hidden")))
  66 void lttng_fixup_time_ns_tls(void);
  67
  68 __attribute__((visibility("hidden")))
  69 void lttng_fixup_uts_ns_tls(void);
  70
  71 __attribute__((visibility("hidden")))
  72 void lttng_ust_fixup_fd_tracker_tls(void);
  73
  74 __attribute__((visibility("hidden")))
  75 const char *lttng_ust_obj_get_name(int id);
  76
  77 __attribute__((visibility("hidden")))
  78 int lttng_get_notify_socket(void *owner);
  79
  80 __attribute__((visibility("hidden")))
  81 char* lttng_ust_sockinfo_get_procname(void *owner);
  82
  83 __attribute__((visibility("hidden")))
  84 void lttng_ust_sockinfo_session_enabled(void *owner);
  85
  86 __attribute__((visibility("hidden")))
  87 ssize_t lttng_ust_read(int fd, void *buf, size_t len);
  88
  89 __attribute__((visibility("hidden")))
  90 size_t lttng_ust_dummy_get_size(struct lttng_ust_ctx_field *field, size_t offset);
  91
  92 __attribute__((visibility("hidden")))
  93 void lttng_ust_dummy_record(struct lttng_ust_ctx_field *field,
  94                  struct lttng_ust_lib_ring_buffer_ctx *ctx,
  95                  struct lttng_channel *chan);
  96 __attribute__((visibility("hidden")))
  97 void lttng_ust_dummy_get_value(struct lttng_ust_ctx_field *field,
  98                 struct lttng_ust_ctx_value *value);
  99
 100 __attribute__((visibility("hidden")))
 101 void lttng_event_notifier_notification_send(
 102                 struct lttng_ust_event_notifier *event_notifier,
 103                 const char *stack_data);
 104
 105 __attribute__((visibility("hidden")))
 106 struct lttng_counter_transport *lttng_counter_transport_find(const char *name);
 107
 108 __attribute__((visibility("hidden")))
 109 void lttng_counter_transport_register(struct lttng_counter_transport *transport);
 110
 111 __attribute__((visibility("hidden")))
 112 void lttng_counter_transport_unregister(struct lttng_counter_transport *transport);
 113
 114 #ifdef HAVE_PERF_EVENT
 115 __attribute__((visibility("hidden")))
 116 void lttng_ust_fixup_perf_counter_tls(void);
 117
 118 __attribute__((visibility("hidden")))
 119 void lttng_perf_lock(void);
 120
 121 __attribute__((visibility("hidden")))
 122 void lttng_perf_unlock(void);
 123 #else /* #ifdef HAVE_PERF_EVENT */
 124 static inline
 125 void lttng_ust_fixup_perf_counter_tls(void)
 126 {
 127 }
 128 static inline
 129 void lttng_perf_lock(void)
 130 {
 131 }
 132 static inline
 133 void lttng_perf_unlock(void)
 134 {
 135 }
 136 #endif /* #else #ifdef HAVE_PERF_EVENT */
 137
 138 #endif /* _LTTNG_TRACER_CORE_H */