[Qemu-devel] [PATCH v3 08/11] trace: [tracetool] Make format-specific code optional and with access to event information

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

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
 scripts/tracetool.py |   35 ++++++++++-------------------------
 1 files changed, 10 insertions(+), 25 deletions(-)

diff --git a/scripts/tracetool.py b/scripts/tracetool.py
index cd1c29d..91e7620 100755
--- a/scripts/tracetool.py
+++ b/scripts/tracetool.py
@@ -38,26 +38,19 @@ Options:
 '''
     sys.exit(1)
 
-def trace_h_begin():
+def trace_h_begin(events):
     print '''#ifndef TRACE_H
 #define TRACE_H
 
 /* This file is autogenerated by tracetool, do not edit. */
 
 #include "qemu-common.h"'''
-    return
 
-def trace_h_end():
+def trace_h_end(events):
     print '#endif /* TRACE_H */'
-    return
 
-def trace_c_begin():
+def trace_c_begin(events):
     print '/* This file is autogenerated by tracetool, do not edit. */'
-    return
-
-def trace_c_end():
-    # nop, required for trace_gen
-    return
 
 def nop_h(events):
     print
@@ -350,7 +343,7 @@ probe %(probeprefix)s.%(name)s = process("%(binary)s").mark("%(name)s")
 def dtrace_nop_stp(events):
     pass
 
-def trace_stap_begin():
+def trace_stap_begin(events):
     global probeprefix
     if backend != "dtrace":
         print 'SystemTAP tapset generator not applicable to %s backend' % backend
@@ -367,20 +360,13 @@ def trace_stap_begin():
     if probeprefix == "":
         probeprefix = 'qemu.' + targettype + '.' + targetarch
     print '/* This file is autogenerated by tracetool, do not edit. */'
-    return
 
-def trace_stap_end():
-    return #nop, reqd for trace_gen
-
-def trace_d_begin():
+def trace_d_begin(events):
     if backend != 'dtrace':
         print 'DTrace probe generator not applicable to %s backend' % backend
         sys.exit(1)
     print '/* This file is autogenerated by tracetool, do not edit. */'
 
-def trace_d_end():
-    return #nop, reqd for trace_gen
-
 
 # Registry of backends and their converter functions
 converters = {
@@ -416,22 +402,19 @@ converters = {
 }
 
 # Trace file header and footer code generators
-trace_gen = {
+formats = {
     'h': {
         'begin': trace_h_begin,
         'end': trace_h_end,
     },
     'c': {
         'begin': trace_c_begin,
-        'end': trace_c_end,
     },
     'd': {
         'begin': trace_d_begin,
-        'end': trace_d_end,
     },
     'stap': {
         'begin': trace_stap_begin,
-        'end': trace_stap_end,
     },
 }
 
@@ -564,10 +547,12 @@ def main():
 
     events = read_events(sys.stdin)
 
-    trace_gen[output]['begin']()
+    if 'begin' in formats[output]:
+        formats[output]['begin'](events)
     converters[backend][output]([ e for e in events if 'disable' not in e.properties ])
     converters['nop'][output]([ e for e in events if 'disable' in e.properties ])
-    trace_gen[output]['end']()
+    if 'end' in formats[output]:
+        formats[output]['end'](events)
 
 if __name__ == "__main__":
     main()