+++ /dev/null
-/*
- * ltt-probes.c
- *
- * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Holds LTTng probes registry.
- *
- * Dual LGPL v2.1/GPL v2 license.
- */
-
-#include <string.h>
-#include <errno.h>
-#include <urcu/list.h>
-#include <lttng/core.h>
-#include <lttng/ust-events.h>
-
-#include "ltt-tracer-core.h"
-
-/*
- * probe list is protected by ust_lock()/ust_unlock().
- */
-static CDS_LIST_HEAD(probe_list);
-
-static
-const struct lttng_event_desc *find_event(const char *name)
-{
- struct lttng_probe_desc *probe_desc;
- int i;
-
- cds_list_for_each_entry(probe_desc, &probe_list, head) {
- for (i = 0; i < probe_desc->nr_events; i++) {
- if (!strcmp(probe_desc->event_desc[i].name, name))
- return &probe_desc->event_desc[i];
- }
- }
- return NULL;
-}
-
-int ltt_probe_register(struct lttng_probe_desc *desc)
-{
- int ret = 0;
- int i;
-
- ust_lock();
- /*
- * TODO: This is O(N^2). Turn into a hash table when probe registration
- * overhead becomes an issue.
- */
- for (i = 0; i < desc->nr_events; i++) {
- if (find_event(desc->event_desc[i].name)) {
- ret = -EEXIST;
- goto end;
- }
- }
- cds_list_add(&desc->head, &probe_list);
-
- /*
- * fix the events awaiting probe load.
- */
- for (i = 0; i < desc->nr_events; i++) {
- ret = pending_probe_fix_events(&desc->event_desc[i]);
- assert(!ret);
- }
-end:
- ust_unlock();
- return ret;
-}
-
-void ltt_probe_unregister(struct lttng_probe_desc *desc)
-{
- ust_lock();
- cds_list_del(&desc->head);
- ust_unlock();
-}
-
-/*
- * called with UST lock held.
- */
-const struct lttng_event_desc *ltt_event_get(const char *name)
-{
- const struct lttng_event_desc *event;
-
- event = find_event(name);
- if (!event)
- return NULL;
- return event;
-}
-
-void ltt_event_put(const struct lttng_event_desc *event)
-{
-}
-
-#if 0
-static
-void *tp_list_start(struct seq_file *m, loff_t *pos)
-{
- struct lttng_probe_desc *probe_desc;
- int iter = 0, i;
-
- pthread_mutex_lock(&probe_mutex);
- cds_list_for_each_entry(probe_desc, &probe_list, head) {
- for (i = 0; i < probe_desc->nr_events; i++) {
- if (iter++ >= *pos)
- return (void *) &probe_desc->event_desc[i];
- }
- }
- /* End of list */
- return NULL;
-}
-
-static
-void *tp_list_next(struct seq_file *m, void *p, loff_t *ppos)
-{
- struct lttng_probe_desc *probe_desc;
- int iter = 0, i;
-
- (*ppos)++;
- cds_list_for_each_entry(probe_desc, &probe_list, head) {
- for (i = 0; i < probe_desc->nr_events; i++) {
- if (iter++ >= *ppos)
- return (void *) &probe_desc->event_desc[i];
- }
- }
- /* End of list */
- return NULL;
-}
-
-static
-void tp_list_stop(struct seq_file *m, void *p)
-{
- pthread_mutex_unlock(&probe_mutex);
-}
-
-static
-int tp_list_show(struct seq_file *m, void *p)
-{
- const struct lttng_event_desc *probe_desc = p;
-
- /*
- * Don't export lttng internal events (metadata).
- */
- if (!strncmp(probe_desc->name, "lttng_", sizeof("lttng_") - 1))
- return 0;
- seq_printf(m, "event { name = %s; };\n",
- probe_desc->name);
- return 0;
-}
-
-static
-const struct seq_operations lttng_tracepoint_list_seq_ops = {
- .start = tp_list_start,
- .next = tp_list_next,
- .stop = tp_list_stop,
- .show = tp_list_show,
-};
-
-static
-int lttng_tracepoint_list_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, <tng_tracepoint_list_seq_ops);
-}
-
-const struct file_operations lttng_tracepoint_list_fops = {
- .open = lttng_tracepoint_list_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-#endif //0