X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=liblttng-ust-ctl%2Fustctl.c;h=e285a2d24b7debc2159b760981c044e4663b7d24;hb=44c72f10aa3cace72ffe40a0f9bb7aadb9c82dc8;hp=886e8485bc8cf683736b52b788d04e9cfdc0f1cf;hpb=5f9d3dbc9ce5bb9d9c91027310e3c268e5937d61;p=lttng-ust.git

diff --git a/liblttng-ust-ctl/ustctl.c b/liblttng-ust-ctl/ustctl.c
index 886e8485..e285a2d2 100644
--- a/liblttng-ust-ctl/ustctl.c
+++ b/liblttng-ust-ctl/ustctl.c
@@ -20,8 +20,11 @@
 #include <string.h>
 #include <lttng/ust-ctl.h>
 #include <lttng/ust-abi.h>
-#include <lttng/usterr-signal-safe.h>
-#include <lttng/ust-comm.h>
+#include <lttng/ust-events.h>
+#include <sys/mman.h>
+
+#include <usterr-signal-safe.h>
+#include <ust-comm.h>
 
 #include "../libringbuffer/backend.h"
 #include "../libringbuffer/frontend.h"
@@ -37,6 +40,10 @@ void init_object(struct lttng_ust_object_data *data)
 	data->memory_map_size = 0;
 }
 
+/*
+ * If sock is negative, it means we don't have to notify the other side
+ * (e.g. application has already vanished).
+ */
 void ustctl_release_object(int sock, struct lttng_ust_object_data *data)
 {
 	struct ustcomm_ust_msg lum;
@@ -47,11 +54,13 @@ void ustctl_release_object(int sock, struct lttng_ust_object_data *data)
 		close(data->shm_fd);
 	if (data->wait_fd >= 0)
 		close(data->wait_fd);
-	memset(&lum, 0, sizeof(lum));
-	lum.handle = data->handle;
-	lum.cmd = LTTNG_UST_RELEASE;
-	ret = ustcomm_send_app_cmd(sock, &lum, &lur);
-	assert(!ret);
+	if (sock >= 0) {
+		memset(&lum, 0, sizeof(lum));
+		lum.handle = data->handle;
+		lum.cmd = LTTNG_UST_RELEASE;
+		ret = ustcomm_send_app_cmd(sock, &lum, &lur);
+		assert(!ret);
+	}
 	free(data);
 }
 
@@ -368,10 +377,39 @@ int ustctl_stop_session(int sock, int handle)
 	return ustctl_disable(sock, &obj);
 }
 
-
 int ustctl_tracepoint_list(int sock)
 {
-	return -ENOSYS;	/* not implemented */
+	struct ustcomm_ust_msg lum;
+	struct ustcomm_ust_reply lur;
+	int ret, tp_list_handle;
+
+	memset(&lum, 0, sizeof(lum));
+	lum.handle = LTTNG_UST_ROOT_HANDLE;
+	lum.cmd = LTTNG_UST_TRACEPOINT_LIST;
+	ret = ustcomm_send_app_cmd(sock, &lum, &lur);
+	if (ret)
+		return ret;
+	tp_list_handle = lur.ret_val;
+	DBG("received tracepoint list handle %u", tp_list_handle);
+	return tp_list_handle;
+}
+
+int ustctl_tracepoint_list_get(int sock, int tp_list_handle,
+		char iter[LTTNG_UST_SYM_NAME_LEN])
+{
+	struct ustcomm_ust_msg lum;
+	struct ustcomm_ust_reply lur;
+	int ret;
+
+	memset(&lum, 0, sizeof(lum));
+	lum.handle = tp_list_handle;
+	lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET;
+	ret = ustcomm_send_app_cmd(sock, &lum, &lur);
+	if (ret)
+		return ret;
+	DBG("received tracepoint list entry %s", lur.u.tracepoint_list_entry);
+	memcpy(iter, lur.u.tracepoint_list_entry, LTTNG_UST_SYM_NAME_LEN);
+	return 0;
 }
 
 int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v)
@@ -420,6 +458,8 @@ struct lttng_ust_shm_handle *ustctl_map_channel(struct lttng_ust_object_data *ch
 	struct lttng_ust_shm_handle *handle;
 	struct channel *chan;
 	size_t chan_size;
+	struct lttng_ust_lib_ring_buffer_config *config;
+	int ret;
 
 	handle = channel_handle_create(chan_data->shm_fd,
 		chan_data->wait_fd,
@@ -449,6 +489,38 @@ struct lttng_ust_shm_handle *ustctl_map_channel(struct lttng_ust_object_data *ch
 		return NULL;
 	}
 	memcpy(handle->shadow_chan, chan, chan_size);
+	/*
+	 * The callback pointers in the producer are invalid in the
+	 * consumer. We need to look them up here.
+	 */
+	config = &handle->shadow_chan->backend.config;
+	switch (config->client_type) {
+	case LTTNG_CLIENT_METADATA:
+		memcpy(&config->cb, lttng_client_callbacks_metadata,
+			sizeof(config->cb));
+		break;
+	case LTTNG_CLIENT_DISCARD:
+		memcpy(&config->cb, lttng_client_callbacks_discard,
+			sizeof(config->cb));
+		break;
+	case LTTNG_CLIENT_OVERWRITE:
+		memcpy(&config->cb, lttng_client_callbacks_overwrite,
+			sizeof(config->cb));
+		break;
+	default:
+		ERR("Unknown client type %d", config->client_type);
+		channel_destroy(chan, handle, 1);
+		return NULL;
+	}
+	/* Replace the object table pointer. */
+	ret = munmap(handle->table->objects[0].memory_map,
+		handle->table->objects[0].memory_map_size);
+	if (ret) {
+		perror("munmap");
+		assert(0);
+	}
+	handle->table->objects[0].memory_map = (char *) handle->shadow_chan;
+	handle->table->objects[0].is_shadow = 1;
 	return handle;
 }
 
@@ -649,9 +721,11 @@ int ustctl_put_subbuf(struct lttng_ust_shm_handle *handle,
 	return 0;
 }
 
-int ustctl_flush_buffer(struct lttng_ust_shm_handle *handle,
-		struct lttng_ust_lib_ring_buffer *buf)
+void ustctl_flush_buffer(struct lttng_ust_shm_handle *handle,
+		struct lttng_ust_lib_ring_buffer *buf,
+		int producer_active)
 {
-	lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE, handle);
-	return 0;
+	lib_ring_buffer_switch_slow(buf,
+		producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH,
+		handle);
 }