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authorLluís Vilanova <vilanova@ac.upc.edu>2013-03-05 14:47:32 +0100
committerStefan Hajnoczi <stefanha@redhat.com>2013-03-28 14:19:57 +0100
commit45be2f5d0dcdd314cd0c70a11220e5e09a44d654 (patch)
tree1352451c027991b2809a2bcb5e70f1a4b13af334 /trace
parent93fba1618ddbbef8bedd8d684cf356586c94bbb1 (diff)
trace: Provide a generic tracing event descriptor
Uses tracetool to generate a backend-independent tracing event description (struct TraceEvent). The values for such structure are generated with the non-public "events" backend ("events-c" frontend). The generation of the defines to check if an event is statically enabled is also moved to the "events" backend ("events-h" frontend). Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'trace')
-rw-r--r--trace/Makefile.objs24
-rw-r--r--trace/event-internal.h33
2 files changed, 56 insertions, 1 deletions
diff --git a/trace/Makefile.objs b/trace/Makefile.objs
index dde9d5784e..156aa250aa 100644
--- a/trace/Makefile.objs
+++ b/trace/Makefile.objs
@@ -1,7 +1,29 @@
# -*- mode: makefile -*-
######################################################################
-# Auto-generated header for tracing routines
+# Auto-generated event descriptions
+
+$(obj)/generated-events.h: $(obj)/generated-events.h-timestamp
+$(obj)/generated-events.h-timestamp: $(SRC_PATH)/trace-events
+ $(call quiet-command,$(TRACETOOL) \
+ --format=events-h \
+ --backend=events \
+ < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
+ @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
+
+$(obj)/generated-events.c: $(obj)/generated-events.c-timestamp
+$(obj)/generated-events.c-timestamp: $(SRC_PATH)/trace-events
+ $(call quiet-command,$(TRACETOOL) \
+ --format=events-c \
+ --backend=events \
+ < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
+ @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
+
+util-obj-y += generated-events.o
+
+
+######################################################################
+# Auto-generated tracing routines
$(obj)/generated-tracers.h: $(obj)/generated-tracers.h-timestamp
@cmp -s $< $@ || cp $< $@
diff --git a/trace/event-internal.h b/trace/event-internal.h
new file mode 100644
index 0000000000..b2310d9bea
--- /dev/null
+++ b/trace/event-internal.h
@@ -0,0 +1,33 @@
+/*
+ * Interface for configuring and controlling the state of tracing events.
+ *
+ * Copyright (C) 2012 Lluís Vilanova <vilanova@ac.upc.edu>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef TRACE__EVENT_INTERNAL_H
+#define TRACE__EVENT_INTERNAL_H
+
+#include "trace/generated-events.h"
+
+
+/**
+ * TraceEvent:
+ * @id: Unique event identifier.
+ * @name: Event name.
+ * @sstate: Static tracing state.
+ * @dstate: Dynamic tracing state.
+ *
+ * Opaque generic description of a tracing event.
+ */
+typedef struct TraceEvent {
+ TraceEventID id;
+ const char * name;
+ const bool sstate;
+ bool dstate;
+} TraceEvent;
+
+
+#endif /* TRACE__EVENT_INTERNAL_H */