#include <lttng-tracer.h>
#include <lttng-abi.h>
#include <lttng-abi-old.h>
+#include <linux/irq_work.h>
#define lttng_is_signed_type(type) (((type)(-1)) < 0)
struct lttng_probe_ctx {
struct lttng_event *event;
+ struct lttng_trigger *trigger; // Not sure if we will ever need it.
uint8_t interruptible;
};
const struct lttng_event_field *fields; /* event payload */
unsigned int nr_fields;
struct module *owner;
+ void *trigger_callback;
};
struct lttng_probe_desc {
const char *filter_stack_data);
int link_failed;
struct list_head node; /* list of bytecode runtime in event */
- struct lttng_event *event;
+ struct lttng_ctx *ctx;
};
/*
};
struct lttng_uprobe_handler {
- struct lttng_event *event;
+ union {
+ struct lttng_event *event;
+ struct lttng_trigger *trigger;
+ } u;
loff_t offset;
struct uprobe_consumer up_consumer;
struct list_head node;
};
+struct lttng_kprobe {
+ struct kprobe kp;
+ char *symbol_name;
+};
+
+struct lttng_uprobe {
+ struct inode *inode;
+ struct list_head head;
+};
+
+struct lttng_syscall {
+ struct list_head node; /* chain registered syscall trigger */
+ unsigned int syscall_id;
+ bool is_compat;
+};
+
/*
* lttng_event structure is referred to by the tracing fast path. It must be
* kept small.
struct lttng_ctx *ctx;
enum lttng_kernel_instrumentation instrumentation;
union {
- struct {
- struct kprobe kp;
- char *symbol_name;
- } kprobe;
+ struct lttng_kprobe kprobe;
struct {
struct lttng_krp *lttng_krp;
char *symbol_name;
struct {
char *symbol_name;
} ftrace;
- struct {
- struct inode *inode;
- struct list_head head;
- } uprobe;
+ struct lttng_uprobe uprobe;
} u;
struct list_head list; /* Event list in session */
unsigned int metadata_dumped:1;
int has_enablers_without_bytecode;
};
-enum lttng_enabler_type {
- LTTNG_ENABLER_STAR_GLOB,
- LTTNG_ENABLER_NAME,
+// FIXME: Really similar to lttng_event above. Could those be merged ?
+struct lttng_trigger {
+ enum lttng_event_type evtype; /* First field. */
+ uint64_t id;
+ int enabled;
+ int registered; /* has reg'd tracepoint probe */
+ const struct lttng_event_desc *desc;
+ void *filter;
+ struct list_head list; /* Trigger list in trigger group */
+
+ enum lttng_kernel_instrumentation instrumentation;
+ union {
+ struct lttng_kprobe kprobe;
+ struct lttng_uprobe uprobe;
+ struct lttng_syscall syscall;
+ } u;
+
+ /* Backward references: list of lttng_enabler_ref (ref to enablers) */
+ struct list_head enablers_ref_head;
+ struct hlist_node hlist; /* session ht of triggers */
+ /* list of struct lttng_bytecode_runtime, sorted by seqnum */
+ struct list_head bytecode_runtime_head;
+ int has_enablers_without_bytecode;
+
+ void (*send_notification)(struct lttng_trigger *trigger);
+ struct lttng_trigger_group *group; /* Weak ref */
+};
+
+enum lttng_enabler_format_type {
+ LTTNG_ENABLER_FORMAT_STAR_GLOB,
+ LTTNG_ENABLER_FORMAT_NAME,
};
/*
struct lttng_enabler {
enum lttng_event_type evtype; /* First field. */
- enum lttng_enabler_type type;
+ enum lttng_enabler_format_type format_type;
- struct list_head node; /* per-session list of enablers */
/* head list of struct lttng_ust_filter_bytecode_node */
struct list_head filter_bytecode_head;
struct lttng_kernel_event event_param;
+ unsigned int enabled:1;
+};
+
+struct lttng_event_enabler {
+ struct lttng_enabler base;
+ struct list_head node; /* per-session list of enablers */
struct lttng_channel *chan;
+ /*
+ * Unused, but kept around to make it explicit that the tracer can do
+ * it.
+ */
struct lttng_ctx *ctx;
- unsigned int enabled:1;
};
+struct lttng_trigger_enabler {
+ struct lttng_enabler base;
+ uint64_t id;
+ struct list_head node; /* List of trigger enablers */
+ struct lttng_trigger_group *group;
+};
+
+static inline
+struct lttng_enabler *lttng_event_enabler_as_enabler(
+ struct lttng_event_enabler *event_enabler)
+{
+ return &event_enabler->base;
+}
+
+static inline
+struct lttng_enabler *lttng_trigger_enabler_as_enabler(
+ struct lttng_trigger_enabler *trigger_enabler)
+{
+ return &trigger_enabler->base;
+}
+
struct lttng_channel_ops {
struct channel *(*channel_create)(const char *name,
- struct lttng_channel *lttng_chan,
+ void *priv,
void *buf_addr,
size_t subbuf_size, size_t num_subbuf,
unsigned int switch_timer_interval,
struct hlist_head table[LTTNG_EVENT_HT_SIZE];
};
+#define LTTNG_TRIGGER_HT_BITS 12
+#define LTTNG_TRIGGER_HT_SIZE (1U << LTTNG_TRIGGER_HT_BITS)
+
+struct lttng_trigger_ht {
+ struct hlist_head table[LTTNG_TRIGGER_HT_SIZE];
+};
+
struct lttng_channel {
unsigned int id;
struct channel *chan; /* Channel buffers */
struct lttng_id_tracker vgid_tracker;
unsigned int metadata_dumped:1,
tstate:1; /* Transient enable state */
- /* List of enablers */
+ /* List of event enablers */
struct list_head enablers_head;
- /* Hash table of events */
+/* Hash table of events */
struct lttng_event_ht events_ht;
char name[LTTNG_KERNEL_SESSION_NAME_LEN];
char creation_time[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN];
};
+struct lttng_trigger_group {
+ struct file *file; /* File associated to trigger group */
+ struct file *notif_file; /* File used to expose notifications to userspace. */
+ struct list_head node; /* Trigger group list */
+ struct list_head enablers_head; /* List of enablers */
+ struct list_head triggers_head; /* List of triggers */
+ struct lttng_trigger_ht triggers_ht; /* Hash table of triggers */
+ struct lttng_ctx *ctx; /* Contexts for filters. */
+ struct lttng_channel_ops *ops;
+ struct lttng_transport *transport;
+ struct channel *chan; /* Ring buffer channel for trigger group. */
+ struct lib_ring_buffer *buf; /* Ring buffer for trigger group. */
+ wait_queue_head_t read_wait;
+ struct irq_work wakeup_pending; /* Pending wakeup irq work. */
+
+ struct list_head *trigger_syscall_dispatch;
+ struct list_head *trigger_compat_syscall_dispatch;
+
+ unsigned int syscall_all:1,
+ sys_enter_registered:1;
+};
+
struct lttng_metadata_cache {
char *data; /* Metadata cache */
unsigned int cache_alloc; /* Metadata allocated size (bytes) */
struct list_head *lttng_get_probe_list_head(void);
-struct lttng_enabler *lttng_enabler_create(enum lttng_enabler_type type,
+struct lttng_event_enabler *lttng_event_enabler_create(
+ enum lttng_enabler_format_type format_type,
struct lttng_kernel_event *event_param,
struct lttng_channel *chan);
-int lttng_enabler_enable(struct lttng_enabler *enabler);
-int lttng_enabler_disable(struct lttng_enabler *enabler);
+int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler);
+int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler);
+struct lttng_trigger_enabler *lttng_trigger_enabler_create(
+ struct lttng_trigger_group *trigger_group,
+ enum lttng_enabler_format_type format_type,
+ struct lttng_kernel_trigger *trigger_param);
+
+int lttng_trigger_enabler_enable(struct lttng_trigger_enabler *trigger_enabler);
+int lttng_trigger_enabler_disable(struct lttng_trigger_enabler *trigger_enabler);
int lttng_fix_pending_events(void);
+int lttng_fix_pending_triggers(void);
int lttng_session_active(void);
+bool lttng_trigger_active(void);
struct lttng_session *lttng_session_create(void);
int lttng_session_enable(struct lttng_session *session);
int lttng_session_statedump(struct lttng_session *session);
void metadata_cache_destroy(struct kref *kref);
+struct lttng_trigger_group *lttng_trigger_group_create(void);
+void lttng_trigger_group_destroy(struct lttng_trigger_group *trigger_group);
+
struct lttng_channel *lttng_channel_create(struct lttng_session *session,
const char *transport_name,
void *buf_addr,
void *filter,
const struct lttng_event_desc *internal_desc);
+struct lttng_trigger *lttng_trigger_create(
+ const struct lttng_event_desc *trigger_desc,
+ uint64_t id,
+ struct lttng_trigger_group *trigger_group,
+ struct lttng_kernel_trigger *trigger_param,
+ void *filter,
+ enum lttng_kernel_instrumentation itype);
+struct lttng_trigger *_lttng_trigger_create(
+ const struct lttng_event_desc *trigger_desc,
+ uint64_t id,
+ struct lttng_trigger_group *trigger_group,
+ struct lttng_kernel_trigger *trigger_param,
+ void *filter,
+ enum lttng_kernel_instrumentation itype);
+
int lttng_channel_enable(struct lttng_channel *channel);
int lttng_channel_disable(struct lttng_channel *channel);
int lttng_event_enable(struct lttng_event *event);
int lttng_event_disable(struct lttng_event *event);
+int lttng_trigger_enable(struct lttng_trigger *trigger);
+int lttng_trigger_disable(struct lttng_trigger *trigger);
+
void lttng_transport_register(struct lttng_transport *transport);
void lttng_transport_unregister(struct lttng_transport *transport);
int lttng_probe_register(struct lttng_probe_desc *desc);
void lttng_probe_unregister(struct lttng_probe_desc *desc);
-const struct lttng_event_desc *lttng_event_get(const char *name);
-void lttng_event_put(const struct lttng_event_desc *desc);
+const struct lttng_event_desc *lttng_event_desc_get(const char *name);
+void lttng_event_desc_put(const struct lttng_event_desc *desc);
int lttng_probes_init(void);
void lttng_probes_exit(void);
void lttng_clock_ref(void);
void lttng_clock_unref(void);
+int lttng_desc_match_enabler(const struct lttng_event_desc *desc,
+ struct lttng_enabler *enabler);
+
#if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
-int lttng_syscalls_register(struct lttng_channel *chan, void *filter);
-int lttng_syscalls_unregister(struct lttng_channel *chan);
-int lttng_syscall_filter_enable(struct lttng_channel *chan,
+int lttng_syscalls_register_event(struct lttng_channel *chan, void *filter);
+int lttng_syscalls_unregister_event(struct lttng_channel *chan);
+int lttng_syscall_filter_enable_event(struct lttng_channel *chan,
const char *name);
-int lttng_syscall_filter_disable(struct lttng_channel *chan,
+int lttng_syscall_filter_disable_event(struct lttng_channel *chan,
const char *name);
long lttng_channel_syscall_mask(struct lttng_channel *channel,
struct lttng_kernel_syscall_mask __user *usyscall_mask);
+
+int lttng_syscalls_register_trigger(struct lttng_trigger_enabler *trigger_enabler, void *filter);
+int lttng_syscals_create_matching_triggers(struct lttng_trigger_enabler *trigger_enabler, void *filter);
+int lttng_syscalls_unregister_trigger(struct lttng_trigger_group *group);
+int lttng_syscall_filter_enable_trigger(struct lttng_trigger *trigger);
+int lttng_syscall_filter_disable_trigger(struct lttng_trigger *trigger);
#else
-static inline int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
+static inline int lttng_syscalls_register_event(
+ struct lttng_channel *chan, void *filter)
{
return -ENOSYS;
}
-static inline int lttng_syscalls_unregister(struct lttng_channel *chan)
+static inline int lttng_syscalls_unregister_event(struct lttng_channel *chan)
{
return 0;
}
-static inline int lttng_syscall_filter_enable(struct lttng_channel *chan,
+static inline int lttng_syscall_filter_enable_event(struct lttng_channel *chan,
const char *name)
{
return -ENOSYS;
}
-static inline int lttng_syscall_filter_disable(struct lttng_channel *chan,
+static inline int lttng_syscall_filter_disable_event(struct lttng_channel *chan,
const char *name)
{
return -ENOSYS;
{
return -ENOSYS;
}
+
+static inline int lttng_syscalls_register_trigger(
+ struct lttng_trigger_group *group, void *filter)
+{
+ return -ENOSYS;
+}
+
+static inline int lttng_syscalls_unregister_trigger(struct lttng_trigger_group *group)
+{
+ return 0;
+}
+
+static inline int lttng_syscall_filter_enable_trigger(struct lttng_trigger_group *group,
+ const char *name)
+{
+ return -ENOSYS;
+}
+
+static inline int lttng_syscall_filter_disable_trigger(struct lttng_trigger_group *group,
+ const char *name)
+{
+ return -ENOSYS;
+}
+
#endif
void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime);
-int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler,
+int lttng_event_enabler_attach_bytecode(struct lttng_event_enabler *event_enabler,
+ struct lttng_kernel_filter_bytecode __user *bytecode);
+int lttng_trigger_enabler_attach_bytecode(struct lttng_trigger_enabler *trigger_enabler,
struct lttng_kernel_filter_bytecode __user *bytecode);
-void lttng_enabler_event_link_bytecode(struct lttng_event *event,
+
+void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc,
+ struct lttng_ctx *ctx,
+ struct list_head *bytecode_runtime_head,
struct lttng_enabler *enabler);
int lttng_probes_init(void);
extern int lttng_statedump_start(struct lttng_session *session);
#ifdef CONFIG_KPROBES
-int lttng_kprobes_register(const char *name,
+int lttng_kprobes_register_event(const char *name,
const char *symbol_name,
uint64_t offset,
uint64_t addr,
struct lttng_event *event);
-void lttng_kprobes_unregister(struct lttng_event *event);
-void lttng_kprobes_destroy_private(struct lttng_event *event);
+void lttng_kprobes_unregister_event(struct lttng_event *event);
+void lttng_kprobes_destroy_event_private(struct lttng_event *event);
+int lttng_kprobes_register_trigger(const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct lttng_trigger *trigger);
+void lttng_kprobes_unregister_trigger(struct lttng_trigger *trigger);
+void lttng_kprobes_destroy_trigger_private(struct lttng_trigger *trigger);
#else
static inline
-int lttng_kprobes_register(const char *name,
+int lttng_kprobes_register_event(const char *name,
const char *symbol_name,
uint64_t offset,
uint64_t addr,
}
static inline
-void lttng_kprobes_unregister(struct lttng_event *event)
+void lttng_kprobes_unregister_event(struct lttng_event *event)
{
}
static inline
-void lttng_kprobes_destroy_private(struct lttng_event *event)
+void lttng_kprobes_destroy_event_private(struct lttng_event *event)
+{
+}
+
+static inline
+int lttng_kprobes_register_trigger(const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct lttng_trigger *trigger)
+{
+ return -ENOSYS;
+}
+
+static inline
+void lttng_kprobes_unregister_trigger(struct lttng_trigger *trigger)
+{
+}
+
+static inline
+void lttng_kprobes_destroy_trigger_private(struct lttng_trigger *trigger)
{
}
#endif
int lttng_event_add_callsite(struct lttng_event *event,
struct lttng_kernel_event_callsite *callsite);
+int lttng_trigger_add_callsite(struct lttng_trigger *trigger,
+ struct lttng_kernel_event_callsite *callsite);
+
#ifdef CONFIG_UPROBES
-int lttng_uprobes_register(const char *name,
+int lttng_uprobes_register_event(const char *name,
int fd, struct lttng_event *event);
-int lttng_uprobes_add_callsite(struct lttng_event *event,
+int lttng_uprobes_event_add_callsite(struct lttng_event *event,
struct lttng_kernel_event_callsite *callsite);
-void lttng_uprobes_unregister(struct lttng_event *event);
-void lttng_uprobes_destroy_private(struct lttng_event *event);
+void lttng_uprobes_unregister_event(struct lttng_event *event);
+void lttng_uprobes_destroy_event_private(struct lttng_event *event);
+int lttng_uprobes_register_trigger(const char *name,
+ int fd, struct lttng_trigger *trigger);
+int lttng_uprobes_trigger_add_callsite(struct lttng_trigger *trigger,
+ struct lttng_kernel_event_callsite *callsite);
+void lttng_uprobes_unregister_trigger(struct lttng_trigger *trigger);
+void lttng_uprobes_destroy_trigger_private(struct lttng_trigger *trigger);
#else
static inline
-int lttng_uprobes_register(const char *name,
+int lttng_uprobes_register_event(const char *name,
int fd, struct lttng_event *event)
{
return -ENOSYS;
}
static inline
-int lttng_uprobes_add_callsite(struct lttng_event *event,
+int lttng_uprobes_event_add_callsite(struct lttng_event *event,
+ struct lttng_kernel_event_callsite *callsite)
+{
+ return -ENOSYS;
+}
+
+static inline
+void lttng_uprobes_unregister_event(struct lttng_event *event)
+{
+}
+
+static inline
+void lttng_uprobes_destroy_event_private(struct lttng_event *event)
+{
+}
+
+static inline
+int lttng_uprobes_register_trigger(const char *name,
+ int fd, struct lttng_trigger *trigger)
+{
+ return -ENOSYS;
+}
+
+static inline
+int lttng_uprobes_trigger_add_callsite(struct lttng_trigger *trigger,
struct lttng_kernel_event_callsite *callsite)
{
return -ENOSYS;
}
static inline
-void lttng_uprobes_unregister(struct lttng_event *event)
+void lttng_uprobes_unregister_trigger(struct lttng_trigger *trigger)
{
}
static inline
-void lttng_uprobes_destroy_private(struct lttng_event *event)
+void lttng_uprobes_destroy_trigger_private(struct lttng_trigger *trigger)
{
}
#endif
projects / deliverable / lttng-modules.git / blobdiff