-#ifndef _LTTNG_TRACEPOINT_TYPES_H
-#define _LTTNG_TRACEPOINT_TYPES_H
-
/*
- * Copyright (c) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * SPDX-License-Identifier: MIT
*
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ */
+
+#ifndef _LTTNG_UST_TRACEPOINT_TYPES_H
+#define _LTTNG_UST_TRACEPOINT_TYPES_H
+
+#include <stdint.h>
+
+/*
+ * Tracepoint probe definition
*
- * Permission is hereby granted to use or copy this program
- * for any purpose, provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
+ * IMPORTANT: this structure is part of the ABI between instrumented
+ * applications and UST. This structure is fixed-size because it is part
+ * of a public array of structures. Rather than extending this
+ * structure, struct lttng_ust_tracepoint should be extended instead.
*/
-struct tracepoint_probe {
- void *func;
+struct lttng_ust_tracepoint_probe {
+ void (*func)(void);
void *data;
};
-#define TRACEPOINT_PADDING 16
-struct tracepoint {
- const char *name;
+/*
+ * Tracepoint definition
+ *
+ * IMPORTANT: this structure is part of the ABI between instrumented
+ * applications and UST. Fields need to be only added at the end, never
+ * reordered, never removed.
+ *
+ * The field @struct_size should be used to determine the size of the
+ * structure. It should be queried before using additional fields added
+ * at the end of the structure.
+ */
+
+struct lttng_ust_tracepoint {
+ uint32_t struct_size;
+
+ const char *provider_name;
+ const char *event_name;
int state;
- struct tracepoint_probe *probes;
+ struct lttng_ust_tracepoint_probe *probes;
int *tracepoint_provider_ref;
const char *signature;
- char padding[TRACEPOINT_PADDING];
+
+ /* End of base ABI. Fields below should be used after checking struct_size. */
};
-#endif /* _LTTNG_TRACEPOINT_TYPES_H */
+#endif /* _LTTNG_UST_TRACEPOINT_TYPES_H */