[Qemu-devel] [RFC PATCH v4 6/8] tracetool: Add support for the 'ust' backend

["Lluís Vilanova" <vilanova@ac.upc.edu>]

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
 scripts/tracetool/backend/ust.py |  102 ++++++++++++++++++++++++++++++++++++++
 1 files changed, 102 insertions(+), 0 deletions(-)
 create mode 100644 scripts/tracetool/backend/ust.py

diff --git a/scripts/tracetool/backend/ust.py b/scripts/tracetool/backend/ust.py
new file mode 100644
index 0000000..6871373
--- /dev/null
+++ b/scripts/tracetool/backend/ust.py
@@ -0,0 +1,102 @@
+#!/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
+
+
+PUBLIC = True
+
+
+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()