[Qemu-devel] [RFC PATCH v4 5/8] tracetool: Add support for the 'simple' backend

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

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
 scripts/tracetool/backend/simple.py |   60 +++++++++++++++++++++++++++++++++++
 1 files changed, 60 insertions(+), 0 deletions(-)
 create mode 100644 scripts/tracetool/backend/simple.py

diff --git a/scripts/tracetool/backend/simple.py b/scripts/tracetool/backend/simple.py
new file mode 100644
index 0000000..fea0a37
--- /dev/null
+++ b/scripts/tracetool/backend/simple.py
@@ -0,0 +1,60 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Simple built-in 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 "trace.h"',
+        '',
+        'TraceEvent trace_list[] = {')
+
+    for e in events:
+        out('{.tp_name = "%(name)s", .state=0},' % {
+                'name': e.name,
+                })
+
+    out('};')
+
+def h(events):
+    out('#include "trace/simple.h"',
+        '')
+
+    for num, e in enumerate(events):
+        if len(e.args):
+            argstr = e.args.names()
+            arg_prefix = ', (uint64_t)(uintptr_t)'
+            cast_args = arg_prefix + arg_prefix.join(argstr)
+            simple_args = (str(num) + cast_args)
+        else:
+            simple_args = str(num)
+
+        out('''\
+static inline void trace_%(name)s(%(args)s)
+{
+    trace%(argc)d(%(trace_args)s);
+}
+''' % {
+                'name': e.name,
+                'args': e.args,
+                'argc': len(e.args),
+                'trace_args': simple_args,
+                })
+
+    out('#define NR_TRACE_EVENTS %d' % len(events))
+    out('extern TraceEvent trace_list[NR_TRACE_EVENTS];')