#include "ltt-sessiond.h"
#include "trace.h"
+/*
+ * get_kernel_channel_by_name
+ *
+ * Find the channel name for the given kernel session.
+ */
+struct ltt_kernel_channel *get_kernel_channel_by_name(
+ char *name, struct ltt_kernel_session *session)
+{
+ struct ltt_kernel_channel *chan;
+
+ if (session == NULL) {
+ ERR("Undefine session");
+ goto error;
+ }
+
+ cds_list_for_each_entry(chan, &session->channel_list.head, list) {
+ if (strcmp(name, chan->channel->name) == 0) {
+ DBG("Found channel by name %s", name);
+ return chan;
+ }
+ }
+
+error:
+ return NULL;
+}
+
+/*
+ * get_kernel_event_by_name
+ *
+ * Find the event name for the given channel.
+ */
+struct ltt_kernel_event *get_kernel_event_by_name(
+ char *name, struct ltt_kernel_channel *channel)
+{
+ struct ltt_kernel_event *ev;
+
+ if (channel == NULL) {
+ ERR("Undefine channel");
+ goto error;
+ }
+
+ cds_list_for_each_entry(ev, &channel->events_list.head, list) {
+ if (strcmp(name, ev->event->name) == 0) {
+ DBG("Found event by name %s for channel %s", name,
+ channel->channel->name);
+ return ev;
+ }
+ }
+
+error:
+ return NULL;
+}
+
/*
* trace_create_kernel_session
*
*
* Return pointer to structure or NULL.
*/
-struct ltt_kernel_channel *trace_create_kernel_channel(void)
+struct ltt_kernel_channel *trace_create_kernel_channel(struct lttng_channel *chan)
{
int ret;
struct ltt_kernel_channel *lkc;
- struct lttng_kernel_channel *chan;
lkc = malloc(sizeof(struct ltt_kernel_channel));
- chan = malloc(sizeof(struct lttng_kernel_channel));
- if (lkc == NULL || chan == NULL) {
- perror("kernel channel malloc");
+ if (lkc == NULL) {
+ perror("ltt_kernel_channel malloc");
goto error;
}
- /* Default value to channel */
- chan->overwrite = DEFAULT_KERNEL_OVERWRITE;
- chan->subbuf_size = DEFAULT_KERNEL_SUBBUF_SIZE;
- chan->num_subbuf = DEFAULT_KERNEL_SUBBUF_NUM;
- chan->switch_timer_interval = DEFAULT_KERNEL_SWITCH_TIMER;
- chan->read_timer_interval = DEFAULT_KERNEL_READ_TIMER;
+ lkc->channel = malloc(sizeof(struct lttng_channel));
+ if (lkc->channel == NULL) {
+ perror("lttng_channel malloc");
+ goto error;
+ }
+ memcpy(lkc->channel, chan, sizeof(struct lttng_channel));
lkc->fd = 0;
lkc->stream_count = 0;
- lkc->channel = chan;
/* Init linked list */
CDS_INIT_LIST_HEAD(&lkc->events_list.head);
CDS_INIT_LIST_HEAD(&lkc->stream_list.head);
*
* Return pointer to structure or NULL.
*/
-struct ltt_kernel_event *trace_create_kernel_event(char *name,
- enum lttng_kernel_instrumentation type)
+struct ltt_kernel_event *trace_create_kernel_event(struct lttng_event *ev)
{
struct ltt_kernel_event *lke;
struct lttng_kernel_event *attr;
goto error;
}
- /* Init event attribute */
- attr->instrumentation = type;
- strncpy(attr->name, name, LTTNG_SYM_NAME_LEN);
+ switch (ev->type) {
+ case LTTNG_EVENT_KPROBES:
+ attr->instrumentation = LTTNG_KERNEL_KPROBES;
+ attr->u.kprobe.addr = ev->attr.kprobe.addr;
+ attr->u.kprobe.offset = ev->attr.kprobe.offset;
+ strncpy(attr->u.kprobe.symbol_name,
+ ev->attr.kprobe.symbol_name, LTTNG_SYM_NAME_LEN);
+ break;
+ case LTTNG_EVENT_FUNCTION:
+ attr->instrumentation = LTTNG_KERNEL_FUNCTION;
+ strncpy(attr->u.ftrace.symbol_name,
+ ev->attr.ftrace.symbol_name, LTTNG_SYM_NAME_LEN);
+ break;
+ case LTTNG_EVENT_TRACEPOINTS:
+ attr->instrumentation = LTTNG_KERNEL_TRACEPOINTS;
+ break;
+ default:
+ ERR("Unknown kernel instrumentation type (%d)", ev->type);
+ goto error;
+ }
+
+ /* Copy event name */
+ strncpy(attr->name, ev->name, LTTNG_SYM_NAME_LEN);
+
/* Setting up a kernel event */
lke->fd = 0;
lke->event = attr;
{
int ret;
struct ltt_kernel_metadata *lkm;
- struct lttng_kernel_channel *attr;
+ struct lttng_channel *chan;
lkm = malloc(sizeof(struct ltt_kernel_metadata));
- attr = malloc(sizeof(struct lttng_kernel_channel));
- if (lkm == NULL || attr == NULL) {
+ chan = malloc(sizeof(struct lttng_channel));
+ if (lkm == NULL || chan == NULL) {
perror("kernel metadata malloc");
goto error;
}
/* Set default attributes */
- attr->overwrite = DEFAULT_KERNEL_OVERWRITE;
- attr->subbuf_size = DEFAULT_KERNEL_SUBBUF_SIZE;
- attr->num_subbuf = DEFAULT_KERNEL_SUBBUF_NUM;
- attr->switch_timer_interval = DEFAULT_KERNEL_SWITCH_TIMER;
- attr->read_timer_interval = DEFAULT_KERNEL_READ_TIMER;
+ chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
+ chan->attr.subbuf_size = DEFAULT_CHANNEL_SUBBUF_SIZE;
+ chan->attr.num_subbuf = DEFAULT_CHANNEL_SUBBUF_NUM;
+ chan->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
+ chan->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
/* Init metadata */
lkm->fd = 0;
- lkm->conf = attr;
+ lkm->conf = chan;
/* Set default metadata path */
ret = asprintf(&lkm->pathname, "%s/metadata", DEFAULT_TRACE_OUTPUT);
if (ret < 0) {
DBG("[trace] Closing session fd %d", session->fd);
/* Close kernel fds */
close(session->fd);
- DBG("[trace] Closing metadata stream fd %d", session->metadata_stream_fd);
- close(session->metadata_stream_fd);
+ if (session->metadata_stream_fd != 0) {
+ DBG("[trace] Closing metadata stream fd %d", session->metadata_stream_fd);
+ close(session->metadata_stream_fd);
+ }
trace_destroy_kernel_metadata(session->metadata);