trace: [tracetool] Minimize the amount of per-backend code

Backends now only contain the essential backend-specific code, and most of the work is moved to frontend code.

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

1 files changed, 15 insertions, 9 deletions

diff --git a/scripts/tracetool/format/h.py b/scripts/tracetool/format/h.py
index 85f011f76b..9b3943002c 100644
--- a/scripts/tracetool/format/h.py
+++ b/scripts/tracetool/format/h.py
@@ -16,23 +16,29 @@ __email__      = "stefanha@linux.vnet.ibm.com"
 from tracetool import out
 
 
-def begin(events):
+def generate(events, backend):
     out('/* This file is autogenerated by tracetool, do not edit. */',
         '',
         '#ifndef TRACE__GENERATED_TRACERS_H',
         '#define TRACE__GENERATED_TRACERS_H',
         '',
-        '#include "qemu-common.h"')
+        '#include "qemu-common.h"',
+        '')
 
-def end(events):
-    out('#endif /* TRACE__GENERATED_TRACERS_H */')
+    backend.generate_begin(events)
 
-def nop(events):
     for e in events:
         out('',
             'static inline void %(api)s(%(args)s)',
             '{',
-            '}',
-            api = e.api(),
-            args = e.args,
-            )
+            api=e.api(),
+            args=e.args)
+
+        if "disable" not in e.properties:
+            backend.generate(e)
+
+        out('}')
+
+    backend.generate_end(events)
+
+    out('#endif /* TRACE__GENERATED_TRACERS_H */')