#include "lttng/core.h"
#include "ltt-tracer.h"
+static
+int lttng_abi_tracepoint_list(void);
+
/*
* Object descriptor table. Should be protected from concurrent access
* by the caller.
static const struct lttng_ust_objd_ops lttng_metadata_ops;
static const struct lttng_ust_objd_ops lttng_event_ops;
static const struct lttng_ust_objd_ops lib_ring_buffer_objd_ops;
+static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops;
enum channel_type {
PER_CPU_CHANNEL,
return ret;
}
-#if 0
-static
-int lttng_abi_tracepoint_list(void)
-{
- int list_objd, ret;
-
- /* TODO: Create list private data */
- list_objd = objd_alloc(NULL, <tng_tracepoint_list_ops);
- if (list_objd < 0) {
- ret = list_objd;
- goto objd_error;
- }
-
- return list_objd;
-
-objd_error:
- return ret;
-}
-#endif //0
-
static
long lttng_abi_tracer_version(int objd,
struct lttng_ust_tracer_version *v)
return lttng_abi_tracer_version(objd,
(struct lttng_ust_tracer_version *) arg);
case LTTNG_UST_TRACEPOINT_LIST:
- return -ENOSYS; //TODO
- //return lttng_abi_tracepoint_list();
+ return lttng_abi_tracepoint_list();
case LTTNG_UST_WAIT_QUIESCENT:
synchronize_trace();
return 0;
.cmd = lttng_session_cmd,
};
+/*
+ * beware: we don't keep the mutex over the send, but we must walk the
+ * whole list each time we are called again. So sending one tracepoint
+ * at a time means this is O(n^2). TODO: do as in the kernel and send
+ * multiple tracepoints for each call to amortize this cost.
+ */
+static
+void ltt_tracepoint_list_get(struct ltt_tracepoint_list *list,
+ char *tp_list_entry)
+{
+ if (!list->got_first) {
+ tracepoint_iter_start(&list->iter);
+ list->got_first = 1;
+ goto copy;
+ }
+ tracepoint_iter_next(&list->iter);
+copy:
+ if (!list->iter.tracepoint) {
+ tp_list_entry[0] = '\0'; /* end of list */
+ } else {
+ memcpy(tp_list_entry, (*list->iter.tracepoint)->name,
+ LTTNG_UST_SYM_NAME_LEN);
+ }
+}
+
+static
+long lttng_tracepoint_list_cmd(int objd, unsigned int cmd, unsigned long arg)
+{
+ struct ltt_tracepoint_list *list = objd_private(objd);
+ char *str = (char *) arg;
+
+ switch (cmd) {
+ case LTTNG_UST_TRACEPOINT_LIST_GET:
+ ltt_tracepoint_list_get(list, str);
+ if (str[0] == '\0')
+ return -ENOENT;
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static
+int lttng_abi_tracepoint_list(void)
+{
+ int list_objd, ret;
+ struct ltt_tracepoint_list *list;
+
+ list_objd = objd_alloc(NULL, <tng_tracepoint_list_ops);
+ if (list_objd < 0) {
+ ret = list_objd;
+ goto objd_error;
+ }
+ list = zmalloc(sizeof(*list));
+ if (!list) {
+ ret = -ENOMEM;
+ goto alloc_error;
+ }
+ objd_set_private(list_objd, list);
+
+ return list_objd;
+
+alloc_error:
+ {
+ int err;
+
+ err = lttng_ust_objd_unref(list_objd);
+ assert(!err);
+ }
+objd_error:
+ return ret;
+}
+
+static
+int lttng_release_tracepoint_list(int objd)
+{
+ struct ltt_tracepoint_list *list = objd_private(objd);
+
+ if (list) {
+ tracepoint_iter_stop(&list->iter);
+ free(list);
+ return 0;
+ } else {
+ return -EINVAL;
+ }
+}
+
+static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops = {
+ .release = lttng_release_tracepoint_list,
+ .cmd = lttng_tracepoint_list_cmd,
+};
+
struct stream_priv_data {
struct lttng_ust_lib_ring_buffer *buf;
struct ltt_channel *ltt_chan;