* Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*/
-#ifndef _LTTNG_TRACEPOINT_TYPES_H
-#define _LTTNG_TRACEPOINT_TYPES_H
+#ifndef _LTTNG_UST_TRACEPOINT_TYPES_H
+#define _LTTNG_UST_TRACEPOINT_TYPES_H
+
+#include <stdint.h>
+
+/*
+ * Tracepoint probe definition
+ *
+ * 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 lttng_ust_tracepoint_probe {
void (*func)(void);
void *data;
};
-#define LTTNG_UST_TRACEPOINT_PADDING 16
+/*
+ * 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 {
- const char *name;
+ uint32_t struct_size;
+
+ const char *provider_name;
+ const char *event_name;
int state;
struct lttng_ust_tracepoint_probe *probes;
int *tracepoint_provider_ref;
const char *signature;
- char padding[LTTNG_UST_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 */