struct lttng_type type;
};
+/*
+ * We need to keep this perf counter field separately from struct
+ * lttng_ctx_field because cpu hotplug needs fixed-location addresses.
+ */
+struct lttng_perf_counter_field {
+ struct notifier_block nb;
+ int hp_enable;
+ struct perf_event_attr *attr;
+ struct perf_event **e; /* per-cpu array */
+};
+
struct lttng_ctx_field {
struct lttng_event_field event_field;
size_t (*get_size)(size_t offset);
struct lib_ring_buffer_ctx *ctx,
struct ltt_channel *chan);
union {
- struct {
- struct perf_event **e; /* per-cpu array */
- struct notifier_block nb;
- int hp_enable;
- struct perf_event_attr *attr;
- } perf_counter;
+ struct lttng_perf_counter_field *perf_counter;
} u;
void (*destroy)(struct lttng_ctx_field *field);
};
struct list_head head; /* chain registered probes */
};
+struct lttng_krp; /* Kretprobe handling */
+
/*
* ltt_event structure is referred to by the tracing fast path. It must be
* kept small.
struct kprobe kp;
char *symbol_name;
} kprobe;
+ struct {
+ struct lttng_krp *lttng_krp;
+ char *symbol_name;
+ } kretprobe;
struct {
char *symbol_name;
} ftrace;
unsigned int read_timer_interval);
void (*channel_destroy)(struct channel *chan);
struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan);
+ int (*buffer_has_read_closed_stream)(struct channel *chan);
void (*buffer_read_close)(struct lib_ring_buffer *buf);
int (*event_reserve)(struct lib_ring_buffer_ctx *ctx,
uint32_t event_id);
int (*is_disabled)(struct channel *chan);
};
+struct ltt_transport {
+ char *name;
+ struct module *owner;
+ struct list_head node;
+ struct ltt_channel_ops ops;
+};
+
struct ltt_channel {
unsigned int id;
struct channel *chan; /* Channel buffers */
unsigned int free_event_id; /* Next event ID to allocate */
struct list_head list; /* Channel list */
struct ltt_channel_ops *ops;
+ struct ltt_transport *transport;
int header_type; /* 0: unset, 1: compact, 2: large */
int metadata_dumped:1;
};
int metadata_dumped:1;
};
-struct ltt_transport {
- char *name;
- struct module *owner;
- struct list_head node;
- struct ltt_channel_ops ops;
-};
-
struct ltt_session *ltt_session_create(void);
int ltt_session_enable(struct ltt_session *session);
int ltt_session_disable(struct ltt_session *session);
int ltt_probes_init(void);
void ltt_probes_exit(void);
struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx);
+int lttng_find_context(struct lttng_ctx *ctx, const char *name);
void lttng_remove_context_field(struct lttng_ctx **ctx,
struct lttng_ctx_field *field);
void lttng_destroy_context(struct lttng_ctx *ctx);
int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx);
int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx);
int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx);
+#ifdef CONFIG_PERF_EVENTS
int lttng_add_perf_counter_to_ctx(uint32_t type,
uint64_t config,
const char *name,
struct lttng_ctx **ctx);
+#else
+static inline
+int lttng_add_perf_counter_to_ctx(uint32_t type,
+ uint64_t config,
+ const char *name,
+ struct lttng_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
#ifdef CONFIG_KPROBES
int lttng_kprobes_register(const char *name,
}
#endif
+#ifdef CONFIG_KRETPROBES
+int lttng_kretprobes_register(const char *name,
+ const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct ltt_event *event_entry,
+ struct ltt_event *event_exit);
+void lttng_kretprobes_unregister(struct ltt_event *event);
+void lttng_kretprobes_destroy_private(struct ltt_event *event);
+#else
+static inline
+int lttng_kretprobes_register(const char *name,
+ const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct ltt_event *event_entry,
+ struct ltt_event *event_exit)
+{
+ return -ENOSYS;
+}
+
+static inline
+void lttng_kretprobes_unregister(struct ltt_event *event)
+{
+}
+
+static inline
+void lttng_kretprobes_destroy_private(struct ltt_event *event)
+{
+}
+#endif
+
#ifdef CONFIG_DYNAMIC_FTRACE
int lttng_ftrace_register(const char *name,
const char *symbol_name,
}
#endif
+int lttng_calibrate(struct lttng_kernel_calibrate *calibrate);
+
extern const struct file_operations lttng_tracepoint_list_fops;
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))