* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _GNU_SOURCE
#define _LGPL_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include "consumer.h"
#include "trace-kernel.h"
+#include "lttng-sessiond.h"
+#include "notification-thread-commands.h"
/*
* Find the channel name for the given kernel session.
struct lttng_channel *chan)
{
struct ltt_kernel_channel *lkc;
+ struct lttng_channel_extended *extended = NULL;
assert(chan);
lkc->channel = zmalloc(sizeof(struct lttng_channel));
if (lkc->channel == NULL) {
PERROR("lttng_channel zmalloc");
- free(lkc);
+ goto error;
+ }
+
+ extended = zmalloc(sizeof(struct lttng_channel_extended));
+ if (!extended) {
+ PERROR("lttng_channel_channel zmalloc");
goto error;
}
memcpy(lkc->channel, chan, sizeof(struct lttng_channel));
+ memcpy(extended, chan->attr.extended.ptr, sizeof(struct lttng_channel_extended));
+ lkc->channel->attr.extended.ptr = extended;
+ extended = NULL;
/*
* If we receive an empty string for channel name, it means the
lkc->stream_count = 0;
lkc->event_count = 0;
lkc->enabled = 1;
+ lkc->published_to_notification_thread = false;
/* Init linked list */
CDS_INIT_LIST_HEAD(&lkc->events_list.head);
CDS_INIT_LIST_HEAD(&lkc->stream_list.head);
return lkc;
error:
+ if (lkc) {
+ free(lkc->channel);
+ }
+ free(extended);
+ free(lkc);
return NULL;
}
if (ctx) {
memcpy(&kctx->ctx, ctx, sizeof(kctx->ctx));
}
+error:
+ return kctx;
+}
- CDS_INIT_LIST_HEAD(&kctx->list);
+/*
+ * Allocate and init a kernel context object from an existing kernel context
+ * object.
+ *
+ * Return the allocated object or NULL on error.
+ */
+struct ltt_kernel_context *trace_kernel_copy_context(
+ struct ltt_kernel_context *kctx)
+{
+ struct ltt_kernel_context *kctx_copy;
+
+ assert(kctx);
+ kctx_copy = zmalloc(sizeof(*kctx_copy));
+ if (!kctx_copy) {
+ PERROR("zmalloc ltt_kernel_context");
+ goto error;
+ }
+
+ memcpy(kctx_copy, kctx, sizeof(*kctx_copy));
+ memset(&kctx_copy->list, 0, sizeof(kctx_copy->list));
error:
- return kctx;
+ return kctx_copy;
}
/*
*
* Return pointer to structure or NULL.
*/
-struct ltt_kernel_event *trace_kernel_create_event(struct lttng_event *ev,
- char *filter_expression, struct lttng_filter_bytecode *filter)
+enum lttng_error_code trace_kernel_create_event(
+ struct lttng_event *ev, char *filter_expression,
+ struct lttng_filter_bytecode *filter,
+ struct ltt_kernel_event **kernel_event)
{
- struct ltt_kernel_event *lke;
+ enum lttng_error_code ret;
struct lttng_kernel_event *attr;
+ struct ltt_kernel_event *local_kernel_event;
assert(ev);
- lke = zmalloc(sizeof(struct ltt_kernel_event));
+ local_kernel_event = zmalloc(sizeof(struct ltt_kernel_event));
attr = zmalloc(sizeof(struct lttng_kernel_event));
- if (lke == NULL || attr == NULL) {
+ if (local_kernel_event == NULL || attr == NULL) {
PERROR("kernel event zmalloc");
+ ret = LTTNG_ERR_NOMEM;
goto error;
}
break;
default:
ERR("Unknown kernel instrumentation type (%d)", ev->type);
+ ret = LTTNG_ERR_INVALID;
goto error;
}
attr->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
/* Setting up a kernel event */
- lke->fd = -1;
- lke->event = attr;
- lke->enabled = 1;
- lke->filter_expression = filter_expression;
- lke->filter = filter;
+ local_kernel_event->fd = -1;
+ local_kernel_event->event = attr;
+ local_kernel_event->enabled = 1;
+ local_kernel_event->filter_expression = filter_expression;
+ local_kernel_event->filter = filter;
+
+ *kernel_event = local_kernel_event;
- return lke;
+ return LTTNG_OK;
error:
free(filter_expression);
free(filter);
- free(lke);
+ free(local_kernel_event);
free(attr);
- return NULL;
+ return ret;
}
/*
{
assert(ctx);
- cds_list_del(&ctx->list);
+ if (ctx->in_list) {
+ cds_list_del(&ctx->list);
+ }
free(ctx);
}
struct ltt_kernel_event *event, *etmp;
struct ltt_kernel_context *ctx, *ctmp;
int ret;
+ enum lttng_error_code status;
assert(channel);
/* Remove from channel list */
cds_list_del(&channel->list);
+ if (notification_thread_handle
+ && channel->published_to_notification_thread) {
+ status = notification_thread_command_remove_channel(
+ notification_thread_handle,
+ channel->key, LTTNG_DOMAIN_KERNEL);
+ assert(status == LTTNG_OK);
+ }
+ free(channel->channel->attr.extended.ptr);
free(channel->channel);
free(channel);
}