* Place - Suite 330, Boston, MA 02111-1307, USA.
*/
+#include <errno.h>
#include <urcu/list.h>
+#include <string.h>
#include <lttng/lttng.h>
#include <lttng-sessiond-comm.h>
#include <lttngerr.h>
+#ifdef CONFIG_LTTNG_TOOLS_HAVE_UST
+#include <ust/lttng-ust-ctl.h>
+#else
+#include "lttng-ust-ctl.h"
+#endif
+
#include "channel.h"
#include "event.h"
#include "kernel-ctl.h"
/*
- * Disable kernel event for a channel from the kernel session.
+ * Setup a lttng_event used to enable *all* syscall tracing.
+ */
+static void init_syscalls_kernel_event(struct lttng_event *event)
+{
+ event->name[0] = '\0';
+ /*
+ * We use LTTNG_EVENT* here since the trace kernel creation will make the
+ * right changes for the kernel.
+ */
+ event->type = LTTNG_EVENT_SYSCALL;
+}
+
+/*
+ * Disable kernel tracepoint event for a channel from the kernel session.
*/
-int event_kernel_disable(struct ltt_kernel_session *ksession,
+int event_kernel_disable_tracepoint(struct ltt_kernel_session *ksession,
struct ltt_kernel_channel *kchan, char *event_name)
{
int ret;
}
/*
- * Disable all kernel event for a channel from the kernel session.
+ * Disable kernel tracepoint events for a channel from the kernel session.
*/
-int event_kernel_disable_all(struct ltt_kernel_session *ksession,
+int event_kernel_disable_all_tracepoints(struct ltt_kernel_session *ksession,
struct ltt_kernel_channel *kchan)
{
int ret;
continue;
}
}
-
ret = LTTCOMM_OK;
+ return ret;
+}
+/*
+ * Disable kernel syscall events for a channel from the kernel session.
+ */
+int event_kernel_disable_all_syscalls(struct ltt_kernel_session *ksession,
+ struct ltt_kernel_channel *kchan)
+{
+ ERR("Cannot disable syscall tracing for existing session. Please destroy session instead.");
+ return LTTCOMM_OK; /* Return OK so disable all succeeds */
+}
+
+/*
+ * Disable all kernel event for a channel from the kernel session.
+ */
+int event_kernel_disable_all(struct ltt_kernel_session *ksession,
+ struct ltt_kernel_channel *kchan)
+{
+ int ret;
+
+ ret = event_kernel_disable_all_tracepoints(ksession, kchan);
+ if (ret != LTTCOMM_OK)
+ return ret;
+ ret = event_kernel_disable_all_syscalls(ksession, kchan);
return ret;
}
/*
- * Enable kernel event for a channel from the kernel session.
+ * Enable kernel tracepoint event for a channel from the kernel session.
*/
-int event_kernel_enable(struct ltt_kernel_session *ksession,
+int event_kernel_enable_tracepoint(struct ltt_kernel_session *ksession,
struct ltt_kernel_channel *kchan, struct lttng_event *event)
{
int ret;
if (kevent == NULL) {
ret = kernel_create_event(event, kchan);
if (ret < 0) {
- ret = LTTCOMM_KERN_ENABLE_FAIL;
- goto error;
+ if (ret == -EEXIST) {
+ ret = LTTCOMM_KERN_EVENT_EXIST;
+ } else {
+ ret = LTTCOMM_KERN_ENABLE_FAIL;
+ }
+ goto end;
}
} else if (kevent->enabled == 0) {
ret = kernel_enable_event(kevent);
if (ret < 0) {
ret = LTTCOMM_KERN_ENABLE_FAIL;
- goto error;
+ goto end;
}
}
-
ret = LTTCOMM_OK;
-
-error:
+end:
return ret;
}
/*
- * Enable all kernel event of a channel of the kernel session.
+ * Enable all kernel tracepoint events of a channel of the kernel session.
*/
-int event_kernel_enable_all(struct ltt_kernel_session *ksession,
+int event_kernel_enable_all_tracepoints(struct ltt_kernel_session *ksession,
struct ltt_kernel_channel *kchan, int kernel_tracer_fd)
{
int size, i, ret;
size = kernel_list_events(kernel_tracer_fd, &event_list);
if (size < 0) {
ret = LTTCOMM_KERN_LIST_FAIL;
- goto error;
+ goto end;
}
for (i = 0; i < size; i++) {
}
}
}
-
free(event_list);
+ ret = LTTCOMM_OK;
+end:
+ return ret;
+
+}
+
+/*
+ * Enable all kernel tracepoint events of a channel of the kernel session.
+ */
+int event_kernel_enable_all_syscalls(struct ltt_kernel_session *ksession,
+ struct ltt_kernel_channel *kchan, int kernel_tracer_fd)
+{
+ int ret;
+ struct lttng_event event;
+ init_syscalls_kernel_event(&event);
+
+ DBG("Enabling all syscall tracing");
+
+ ret = kernel_create_event(&event, kchan);
+ if (ret < 0) {
+ goto end;
+ }
ret = LTTCOMM_OK;
+end:
+ return ret;
+}
-error:
+/*
+ * Enable all kernel events of a channel of the kernel session.
+ */
+int event_kernel_enable_all(struct ltt_kernel_session *ksession,
+ struct ltt_kernel_channel *kchan, int kernel_tracer_fd)
+{
+ int ret;
+
+ ret = event_kernel_enable_all_tracepoints(ksession, kchan, kernel_tracer_fd);
+ if (ret != LTTCOMM_OK) {
+ goto end;
+ }
+ ret = event_kernel_enable_all_syscalls(ksession, kchan, kernel_tracer_fd);
+end:
+ return ret;
+}
+
+/*
+ * Enable UST tracepoint event for a channel from a UST session.
+ */
+int event_ust_enable_tracepoint(struct ltt_ust_session *ustsession,
+ struct ltt_ust_channel *ustchan, struct lttng_event *event)
+{
+ int ret;
+ struct ltt_ust_event *ustevent;
+ struct lttng_ust_event lttngustevent;
+ struct object_data *object_event;
+
+ ustevent = trace_ust_get_event_by_name(event->name, ustchan);
+ if (ustevent == NULL) {
+ ustevent = trace_ust_create_event(event);
+ if (ustevent == NULL) {
+ ret = -1;
+ goto end;
+ }
+ strncpy(lttngustevent.name, event->name,
+ LTTNG_UST_SYM_NAME_LEN);
+ lttngustevent.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ /* TODO: adjust to other instrumentation types */
+ lttngustevent.instrumentation = LTTNG_UST_TRACEPOINT;
+ ret = ustctl_create_event(ustsession->sock, <tngustevent,
+ ustchan->obj, &object_event);
+ if (ret < 0) {
+ if (ret == -EEXIST) {
+ ret = LTTCOMM_KERN_EVENT_EXIST;
+ } else {
+ ret = LTTCOMM_KERN_ENABLE_FAIL;
+ }
+ goto end;
+ }
+ ustevent->obj = object_event;
+ ustevent->handle = object_event->handle;
+ ustevent->enabled = 1;
+ /* Add event to event list */
+ cds_list_add(&ustevent->list, &ustchan->events.head);
+ ustchan->events.count++;
+ } else if (ustevent->enabled == 0) {
+ ret = ustctl_enable(ustsession->sock, ustevent->obj);
+ if (ret < 0) {
+ ret = LTTCOMM_KERN_ENABLE_FAIL;
+ goto end;
+ }
+ ustevent->enabled = 1;
+ }
+ ret = LTTCOMM_OK;
+end:
+ return ret;
+}
+
+int event_ust_disable_tracepoint(struct ltt_ust_session *ustsession,
+ struct ltt_ust_channel *ustchan, char *event_name)
+{
+ int ret;
+ struct ltt_ust_event *ustevent;
+
+ ustevent = trace_ust_get_event_by_name(event_name, ustchan);
+ if (ustevent == NULL) {
+ ret = LTTCOMM_NO_EVENT;
+ goto end;
+ }
+ ret = ustctl_disable(ustsession->sock, ustevent->obj);
+ if (ret < 0) {
+ ret = LTTCOMM_UST_ENABLE_FAIL;
+ goto end;
+ }
+ ustevent->enabled = 0;
+ ret = LTTCOMM_OK;
+end:
return ret;
}
projects / lttng-tools.git / blobdiff