tracetool: Add support for the 'ust' backend

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>

scripts/tracetool/backend/ust.py

@@ -0,0 +1,90 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+LTTng User Space Tracing backend.
+"""
+
+__author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__  = "Copyright 2012, Lluís Vilanova <vilanova@ac.upc.edu>"
+__license__    = "GPL version 2 or (at your option) any later version"
+
+__maintainer__ = "Stefan Hajnoczi"
+__email__      = "stefanha@linux.vnet.ibm.com"
+
+
+from tracetool import out
+
+
+def c(events):
+    out('#include <ust/marker.h>',
+        '#undef mutex_lock',
+        '#undef mutex_unlock',
+        '#undef inline',
+        '#undef wmb',
+        '#include "trace.h"')
+
+    for e in events:
+        argnames = ", ".join(e.args.names())
+        if len(e.args) > 0:
+            argnames = ', ' + argnames
+
+            out('DEFINE_TRACE(ust_%(name)s);',
+                '',
+                'static void ust_%(name)s_probe(%(args)s)',
+                '{',
+                '    trace_mark(ust, %(name)s, %(fmt)s%(argnames)s);',
+                '}',
+                name = e.name,
+                args = e.args,
+                fmt = e.fmt,
+                argnames = argnames,
+                )
+
+        else:
+            out('DEFINE_TRACE(ust_%(name)s);',
+                '',
+                'static void ust_%(name)s_probe(%(args)s)',
+                '{',
+                '    trace_mark(ust, %(name)s, UST_MARKER_NOARGS);',
+                '}',
+                name = e.name,
+                args = e.args,
+                )
+
+    # register probes
+    out('',
+        'static void __attribute__((constructor)) trace_init(void)',
+        '{')
+
+    for e in events:
+        out('    register_trace_ust_%(name)s(ust_%(name)s_probe);',
+            name = e.name,
+            )
+
+    out('}')
+
+
+def h(events):
+    out('#include <ust/tracepoint.h>',
+        '#undef mutex_lock',
+        '#undef mutex_unlock',
+        '#undef inline',
+        '#undef wmb')
+
+    for e in events:
+        if len(e.args) > 0:
+            out('DECLARE_TRACE(ust_%(name)s, TP_PROTO(%(args)s), TP_ARGS(%(argnames)s));',
+                '#define trace_%(name)s trace_ust_%(name)s',
+                name = e.name,
+                args = e.args,
+                argnames = ", ".join(e.args.names()),
+                )
+
+        else:
+            out('_DECLARE_TRACEPOINT_NOARGS(ust_%(name)s);',
+                '#define trace_%(name)s trace_ust_%(name)s',
+                name = e.name,
+                )
+
+    out()