trace: [tcg] Generate TCG tracing routines

Generate header "trace/generated-tcg-tracers.h" with the necessary routines for
tracing events in guest code:

* trace_${event}_tcg

  Convenience wrapper that calls the translation-time tracer
  'trace_${event}_trans', and calls 'gen_helper_trace_${event}_exec to
  generate the TCG code to later trace the event at execution time.

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

1 files changed, 57 insertions, 0 deletions

diff --git a/scripts/tracetool/format/tcg_h.py b/scripts/tracetool/format/tcg_h.py
new file mode 100644
index 0000000000..f676b66622
--- /dev/null
+++ b/scripts/tracetool/format/tcg_h.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Generate .h file for TCG code generation.
+"""
+
+__author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__  = "Copyright 2012-2014, 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 generate(events, backend):
+    out('/* This file is autogenerated by tracetool, do not edit. */',
+        '/* You must include this file after the inclusion of helper.h */',
+        '',
+        '#ifndef TRACE__GENERATED_TCG_TRACERS_H',
+        '#define TRACE__GENERATED_TCG_TRACERS_H',
+        '',
+        '#include <stdint.h>',
+        '',
+        '#include "trace.h"',
+        '#include "exec/helper-proto.h"',
+        '',
+        )
+
+    for e in events:
+        # just keep one of them
+        if "tcg-trans" not in e.properties:
+            continue
+
+        # get the original event definition
+        e = e.original.original
+
+        out('static inline void %(name_tcg)s(%(args)s)',
+            '{',
+            name_tcg=e.api(e.QEMU_TRACE_TCG),
+            args=e.args)
+
+        if "disable" not in e.properties:
+            out('    %(name_trans)s(%(argnames_trans)s);',
+                '    gen_helper_%(name_exec)s(%(argnames_exec)s);',
+                name_trans=e.event_trans.api(e.QEMU_TRACE),
+                name_exec=e.event_exec.api(e.QEMU_TRACE),
+                argnames_trans=", ".join(e.event_trans.args.names()),
+                argnames_exec=", ".join(e.event_exec.args.names()))
+
+        out('}')
+
+    out('',
+        '#endif /* TRACE__GENERATED_TCG_TRACERS_H */')