* Ftrace function tracer does not seem to provide synchronization between probe
* teardown and callback execution. Therefore, we make this module permanently
* loaded (unloadable).
+ *
+ * TODO: Move to register_ftrace_function() (which is exported for
+ * modules) for Linux >= 3.0. It is faster (only enables the selected
+ * functions), and will stay there.
*/
#include <linux/module.h>
} payload;
int ret;
- if (!ACCESS_ONCE(chan->session->active))
+ if (unlikely(!ACCESS_ONCE(chan->session->active)))
+ return;
+ if (unlikely(!ACCESS_ONCE(chan->enabled)))
+ return;
+ if (unlikely(!ACCESS_ONCE(event->enabled)))
return;
- lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL,
+
+ lib_ring_buffer_ctx_init(&ctx, chan->chan, event,
sizeof(payload), ltt_alignof(payload), -1);
ret = chan->ops->event_reserve(&ctx, event->id);
if (ret < 0)
fields[0].type.atype = atype_integer;
fields[0].type.u.basic.integer.size = sizeof(unsigned long) * CHAR_BIT;
fields[0].type.u.basic.integer.alignment = ltt_alignof(unsigned long) * CHAR_BIT;
- fields[0].type.u.basic.integer.signedness = 0;
+ fields[0].type.u.basic.integer.signedness = is_signed_type(unsigned long);
fields[0].type.u.basic.integer.reverse_byte_order = 0;
fields[0].type.u.basic.integer.base = 16;
fields[0].type.u.basic.integer.encoding = lttng_encode_none;
fields[1].type.atype = atype_integer;
fields[1].type.u.basic.integer.size = sizeof(unsigned long) * CHAR_BIT;
fields[1].type.u.basic.integer.alignment = ltt_alignof(unsigned long) * CHAR_BIT;
- fields[1].type.u.basic.integer.signedness = 0;
+ fields[1].type.u.basic.integer.signedness = is_signed_type(unsigned long);
fields[1].type.u.basic.integer.reverse_byte_order = 0;
fields[1].type.u.basic.integer.base = 16;
fields[1].type.u.basic.integer.encoding = lttng_encode_none;
+ desc->owner = THIS_MODULE;
event->desc = desc;
return 0;
{
wrapper_unregister_ftrace_function_probe(event->u.ftrace.symbol_name,
<tng_ftrace_ops, event);
+}
+EXPORT_SYMBOL_GPL(lttng_ftrace_unregister);
+
+void lttng_ftrace_destroy_private(struct ltt_event *event)
+{
kfree(event->u.ftrace.symbol_name);
kfree(event->desc->fields);
kfree(event->desc->name);
kfree(event->desc);
}
-EXPORT_SYMBOL_GPL(lttng_ftrace_unregister);
+EXPORT_SYMBOL_GPL(lttng_ftrace_destroy_private);
int lttng_ftrace_init(void)
{