* lttng-events.h
*
* Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org>
- * Copyright (C) 2010-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * Dual LGPL v2.1/GPL v2 license.
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-
+#include <linux/uaccess.h>
#include <linux/debugfs.h>
#include "lttng.h"
#include "lttng-types.h"
} \
goto __end_field_##dest;
-#undef tp_memcpy
-#define tp_memcpy(dest, src, len) \
+/* fixed length array memcpy */
+#undef tp_memcpy_gen
+#define tp_memcpy_gen(write_ops, dest, src, len) \
__assign_##dest: \
if (0) \
(void) __typemap.dest; \
lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \
- __chan->ops->event_write(&__ctx, src, len); \
+ __chan->ops->write_ops(&__ctx, src, len); \
goto __end_field_##dest;
-#undef tp_memcpy_dyn
-#define tp_memcpy_dyn(dest, src) \
+#undef tp_memcpy
+#define tp_memcpy(dest, src, len) \
+ tp_memcpy_gen(event_write, dest, src, len)
+
+#undef tp_memcpy_from_user
+#define tp_memcpy_from_user(dest, src, len) \
+ tp_memcpy_gen(event_write_from_user, dest, src, len)
+
+/* variable length sequence memcpy */
+#undef tp_memcpy_dyn_gen
+#define tp_memcpy_dyn_gen(write_ops, dest, src) \
__assign_##dest##_1: \
{ \
u32 __tmpl = __dynamic_len[__dynamic_len_idx]; \
goto __end_field_##dest##_1; \
__assign_##dest##_2: \
lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \
- __chan->ops->event_write(&__ctx, src, \
+ __chan->ops->write_ops(&__ctx, src, \
sizeof(__typemap.dest) * __get_dynamic_array_len(dest));\
goto __end_field_##dest##_2;
-#undef tp_memcpy_from_user
-#define tp_memcpy_from_user(dest, src, len) \
- __assign_##dest: \
- if (0) \
- (void) __typemap.dest; \
- lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \
- __chan->ops->event_write_from_user(&__ctx, src, len); \
- goto __end_field_##dest;
+#undef tp_memcpy_dyn
+#define tp_memcpy_dyn(dest, src) \
+ tp_memcpy_dyn_gen(event_write, dest, src)
+
+#undef tp_memcpy_dyn_from_user
+#define tp_memcpy_dyn_from_user(dest, src) \
+ tp_memcpy_dyn_gen(event_write_from_user, dest, src)
/*
* The string length including the final \0.
#undef TP_fast_assign
#define TP_fast_assign(args...) args
+/*
+ * For state dump, check that "session" argument (mandatory) matches the
+ * session this event belongs to. Ensures that we write state dump data only
+ * into the started session, not into all sessions.
+ */
+#ifdef TP_SESSION_CHECK
+#define _TP_SESSION_CHECK(session, csession) (session == csession)
+#else /* TP_SESSION_CHECK */
+#define _TP_SESSION_CHECK(session, csession) 1
+#endif /* TP_SESSION_CHECK */
+
#undef DECLARE_EVENT_CLASS
#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
static void __event_probe__##_name(void *__data, _proto) \
struct __event_typemap__##_name __typemap; \
int __ret; \
\
- if (0) \
+ if (0) { \
(void) __dynamic_len_idx; /* don't warn if unused */ \
+ (void) __typemap; /* don't warn if unused */ \
+ } \
+ if (!_TP_SESSION_CHECK(session, __chan->session)) \
+ return; \
if (unlikely(!ACCESS_ONCE(__chan->session->active))) \
return; \
if (unlikely(!ACCESS_ONCE(__chan->enabled))) \
size_t __event_len, __event_align; \
int __ret; \
\
+ if (!_TP_SESSION_CHECK(session, __chan->session)) \
+ return; \
if (unlikely(!ACCESS_ONCE(__chan->session->active))) \
return; \
if (unlikely(!ACCESS_ONCE(__chan->enabled))) \
#define module_exit_eval1(_token, _system) module_exit(_token##_system)
#define module_exit_eval(_token, _system) module_exit_eval1(_token, _system)
-#ifndef TP_MODULE_OVERRIDE
+#ifndef TP_MODULE_NOINIT
static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void)
{
wrapper_vmalloc_sync_all();
return lttng_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM));
}
-module_init_eval(__lttng_events_init__, TRACE_SYSTEM);
-
static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void)
{
lttng_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM));
}
+#ifndef TP_MODULE_NOAUTOLOAD
+module_init_eval(__lttng_events_init__, TRACE_SYSTEM);
module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM);
#endif
+#endif
+
#undef module_init_eval
#undef module_exit_eval
#undef TP_ID1
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