* Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* Holds LTTng per-session event registry.
+ *
+ * Dual LGPL v2.1/GPL v2 license.
*/
#include <linux/list.h>
-#include <linux/uuid.h>
+#include <linux/kprobes.h>
+#include "wrapper/uuid.h"
#include "ltt-debugfs-abi.h"
+#undef is_signed_type
+#define is_signed_type(type) (((type)(-1)) < 0)
+
struct ltt_channel;
struct ltt_session;
struct lib_ring_buffer_ctx;
+struct perf_event;
+struct perf_event_attr;
/* Type description */
/* Update the string_encodings name table in lttng-types.c along with this enum */
enum lttng_string_encodings {
- lttng_encode_UTF8 = 0,
- lttng_encode_ASCII = 1,
+ lttng_encode_none = 0,
+ lttng_encode_UTF8 = 1,
+ lttng_encode_ASCII = 2,
NR_STRING_ENCODINGS,
};
const char *string;
};
-#define __type_integer(_type, _byte_order) \
+#define __type_integer(_type, _byte_order, _base, _encoding) \
{ \
.atype = atype_integer, \
.u.basic.integer = \
{ \
- .size = sizeof(_type), \
+ .size = sizeof(_type) * CHAR_BIT, \
.alignment = ltt_alignof(_type) * CHAR_BIT, \
.signedness = is_signed_type(_type), \
.reverse_byte_order = _byte_order != __BYTE_ORDER, \
+ .base = _base, \
+ .encoding = lttng_encode_##_encoding, \
}, \
} \
unsigned short alignment; /* in bits */
unsigned int signedness:1;
unsigned int reverse_byte_order:1;
+ unsigned int base; /* 2, 8, 10, 16, for pretty print */
+ enum lttng_string_encodings encoding;
};
union _lttng_basic_type {
struct lttng_event_field {
const char *name;
- const struct lttng_type type;
+ 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);
+ void (*record)(struct lttng_ctx_field *field,
+ struct lib_ring_buffer_ctx *ctx,
+ struct ltt_channel *chan);
+ union {
+ struct lttng_perf_counter_field *perf_counter;
+ } u;
+ void (*destroy)(struct lttng_ctx_field *field);
+};
+
+struct lttng_ctx {
+ struct lttng_ctx_field *fields;
+ unsigned int nr_fields;
+ unsigned int allocated_fields;
};
struct lttng_event_desc {
- const struct lttng_event_field *fields;
const char *name;
void *probe_callback;
+ const struct lttng_event_ctx *ctx; /* context */
+ const struct lttng_event_field *fields; /* event payload */
unsigned int nr_fields;
+ struct module *owner;
};
struct lttng_probe_desc {
- const struct lttng_event_desc *event_desc;
+ const struct lttng_event_desc **event_desc;
unsigned int nr_events;
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 ltt_event {
unsigned int id;
struct ltt_channel *chan;
+ int enabled;
const struct lttng_event_desc *desc;
void *filter;
- enum instrum_type itype;
+ struct lttng_ctx *ctx;
+ enum lttng_kernel_instrumentation instrumentation;
+ union {
+ struct {
+ struct kprobe kp;
+ char *symbol_name;
+ } kprobe;
+ struct {
+ struct lttng_krp *lttng_krp;
+ char *symbol_name;
+ } kretprobe;
+ struct {
+ char *symbol_name;
+ } ftrace;
+ } u;
struct list_head list; /* Event list */
int metadata_dumped:1;
};
struct ltt_channel_ops {
struct channel *(*channel_create)(const char *name,
- struct ltt_session *session,
+ struct ltt_channel *ltt_chan,
void *buf_addr,
size_t subbuf_size, size_t num_subbuf,
unsigned int switch_timer_interval,
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);
+ int (*event_reserve)(struct lib_ring_buffer_ctx *ctx,
+ uint32_t event_id);
void (*event_commit)(struct lib_ring_buffer_ctx *ctx);
void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src,
size_t len);
* may change due to concurrent writes.
*/
size_t (*packet_avail_size)(struct channel *chan);
- wait_queue_head_t *(*get_reader_wait_queue)(struct ltt_channel *chan);
+ wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu);
+ wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan);
+ int (*is_finalized)(struct channel *chan);
+ 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 */
+ int enabled;
+ struct lttng_ctx *ctx;
/* Event ID management */
struct ltt_session *session;
struct file *file; /* File associated to channel */
unsigned int free_event_id; /* Next event ID to allocate */
struct list_head list; /* Channel list */
- wait_queue_head_t notify_wait; /* Channel addition notif. waitqueue */
struct ltt_channel_ops *ops;
+ struct ltt_transport *transport;
+ struct ltt_event **sc_table; /* for syscall tracing */
+ int header_type; /* 0: unset, 1: compact, 2: large */
int metadata_dumped:1;
- int header_type:2; /* 0: unset, 1: compact, 2: large */
};
struct ltt_session {
int active; /* Is trace session active ? */
+ int been_active; /* Has trace session been active ? */
struct file *file; /* File associated to session */
struct ltt_channel *metadata; /* Metadata channel */
struct list_head chan; /* Channel list head */
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_start(struct ltt_session *session);
-int ltt_session_stop(struct ltt_session *session);
+int ltt_session_enable(struct ltt_session *session);
+int ltt_session_disable(struct ltt_session *session);
void ltt_session_destroy(struct ltt_session *session);
struct ltt_channel *ltt_channel_create(struct ltt_session *session,
size_t subbuf_size, size_t num_subbuf,
unsigned int switch_timer_interval,
unsigned int read_timer_interval);
-void _ltt_channel_destroy(struct ltt_channel *chan);
struct ltt_event *ltt_event_create(struct ltt_channel *chan,
- char *name,
- enum instrum_type itype,
- const struct lttng_event_desc *event_desc,
- void *filter);
-int ltt_event_unregister(struct ltt_event *event);
+ struct lttng_kernel_event *event_param,
+ void *filter,
+ const struct lttng_event_desc *internal_desc);
+
+int ltt_channel_enable(struct ltt_channel *channel);
+int ltt_channel_disable(struct ltt_channel *channel);
+int ltt_event_enable(struct ltt_event *event);
+int ltt_event_disable(struct ltt_event *event);
void ltt_transport_register(struct ltt_transport *transport);
void ltt_transport_unregister(struct ltt_transport *transport);
+void synchronize_trace(void);
int ltt_debugfs_abi_init(void);
void ltt_debugfs_abi_exit(void);
int ltt_probes_init(void);
void ltt_probes_exit(void);
+#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
+int lttng_syscalls_register(struct ltt_channel *chan, void *filter);
+int lttng_syscalls_unregister(struct ltt_channel *chan);
+#else
+static inline int lttng_syscalls_register(struct ltt_channel *chan, void *filter)
+{
+ return -ENOSYS;
+}
+
+static inline int lttng_syscalls_unregister(struct ltt_channel *chan)
+{
+ return 0;
+}
+#endif
+
+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_pid_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_comm_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_prio_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_nice_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_tid_to_ctx(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);
+#if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
+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,
+ const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct ltt_event *event);
+void lttng_kprobes_unregister(struct ltt_event *event);
+void lttng_kprobes_destroy_private(struct ltt_event *event);
+#else
+static inline
+int lttng_kprobes_register(const char *name,
+ const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct ltt_event *event)
+{
+ return -ENOSYS;
+}
+
+static inline
+void lttng_kprobes_unregister(struct ltt_event *event)
+{
+}
+
+static inline
+void lttng_kprobes_destroy_private(struct ltt_event *event)
+{
+}
+#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,
+ struct ltt_event *event);
+void lttng_ftrace_unregister(struct ltt_event *event);
+void lttng_ftrace_destroy_private(struct ltt_event *event);
+#else
+static inline
+int lttng_ftrace_register(const char *name,
+ const char *symbol_name,
+ struct ltt_event *event)
+{
+ return -ENOSYS;
+}
+
+static inline
+void lttng_ftrace_unregister(struct ltt_event *event)
+{
+}
+
+static inline
+void lttng_ftrace_destroy_private(struct ltt_event *event)
+{
+}
+#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))
+#define TRACEPOINT_HAS_DATA_ARG
+#endif
+
#endif /* _LTT_EVENTS_H */
projects / lttng-modules.git / blobdiff