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 <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_event_notifier;
  36
  37 int ust_lock(void) __attribute__ ((warn_unused_result));
  38 void ust_lock_nocheck(void);
  39 void ust_unlock(void);
  40
  41 void lttng_fixup_event_tls(void);
  42 void lttng_fixup_vtid_tls(void);
  43 void lttng_fixup_procname_tls(void);
  44 void lttng_fixup_cgroup_ns_tls(void);
  45 void lttng_fixup_ipc_ns_tls(void);
  46 void lttng_fixup_net_ns_tls(void);
  47 LTTNG_HIDDEN
  48 void lttng_fixup_time_ns_tls(void);
  49 void lttng_fixup_uts_ns_tls(void);
  50
  51 const char *lttng_ust_obj_get_name(int id);
  52
  53 int lttng_get_notify_socket(void *owner);
  54
  55 LTTNG_HIDDEN
  56 char* lttng_ust_sockinfo_get_procname(void *owner);
  57
  58 void lttng_ust_sockinfo_session_enabled(void *owner);
  59
  60 void lttng_ust_malloc_wrapper_init(void);
  61
  62 ssize_t lttng_ust_read(int fd, void *buf, size_t len);
  63
  64 size_t lttng_ust_dummy_get_size(struct lttng_ctx_field *field, size_t offset);
  65 void lttng_ust_dummy_record(struct lttng_ctx_field *field,
  66                  struct lttng_ust_lib_ring_buffer_ctx *ctx,
  67                  struct lttng_channel *chan);
  68 void lttng_ust_dummy_get_value(struct lttng_ctx_field *field,
  69                 struct lttng_ctx_value *value);
  70 int lttng_context_is_app(const char *name);
  71 void lttng_ust_fixup_tls(void);
  72
  73 extern void (*lttng_ust_liburcu_bp_before_fork)(void);
  74 extern void (*lttng_ust_liburcu_bp_after_fork_parent)(void);
  75 extern void (*lttng_ust_liburcu_bp_after_fork_child)(void);
  76
  77 LTTNG_HIDDEN
  78 void lttng_event_notifier_notification_send(
  79                 struct lttng_event_notifier *event_notifier,
  80                 const char *stack_data);
  81
  82 LTTNG_HIDDEN
  83 struct lttng_counter_transport *lttng_counter_transport_find(const char *name);
  84 LTTNG_HIDDEN
  85 void lttng_counter_transport_register(struct lttng_counter_transport *transport);
  86 LTTNG_HIDDEN
  87 void lttng_counter_transport_unregister(struct lttng_counter_transport *transport);
  88
  89 #ifdef LTTNG_UST_HAVE_PERF_EVENT
  90 void lttng_ust_fixup_perf_counter_tls(void);
  91 void lttng_perf_lock(void);
  92 void lttng_perf_unlock(void);
  93 #else /* #ifdef LTTNG_UST_HAVE_PERF_EVENT */
  94 static inline
  95 void lttng_ust_fixup_perf_counter_tls(void)
  96 {
  97 }
  98 static inline
  99 void lttng_perf_lock(void)
 100 {
 101 }
 102 static inline
 103 void lttng_perf_unlock(void)
 104 {
 105 }
 106 #endif /* #else #ifdef LTTNG_UST_HAVE_PERF_EVENT */
 107
 108 #endif /* _LTTNG_TRACER_CORE_H */