[Qemu-devel] [PATCH 3/6] trace: [ŧracetool] Do not precompute the event number

[Lluís Vilanova]

This would otherwise break event numbering when actually using the "disable"
property.

Signed-off-by: Lluís Vilanova <vilan...@ac.upc.edu>
---
 scripts/tracetool.py |   21 +++++++++------------
 1 files changed, 9 insertions(+), 12 deletions(-)

diff --git a/scripts/tracetool.py b/scripts/tracetool.py
index 7a877dc..b7401a3 100755
--- a/scripts/tracetool.py
+++ b/scripts/tracetool.py
@@ -128,7 +128,7 @@ def simple_h(events):
     'args': event.args
 }
     print
-    print '#define NR_TRACE_EVENTS %d' % (event.num + 1)
+    print '#define NR_TRACE_EVENTS %d' % len(events)
     print 'extern TraceEvent trace_list[NR_TRACE_EVENTS];'
 
     return
@@ -154,7 +154,7 @@ def simple_c(events):
         print
     print '};'
     print
-    for event in events:
+    for num, event in enumerate(events):
         argc = event.argc
         print '''void trace_%(name)s(%(args)s)
 {
@@ -169,12 +169,12 @@ def simple_c(events):
 ''' % {
     'name': event.name,
     'args': event.args,
-    'event_id': event.num,
+    'event_id': num,
 }
         print '''
     tbuf_idx = trace_alloc_record(%(event_id)s, %(sizestr)s);
     rec_off = (tbuf_idx + ST_V2_REC_HDR_LEN) %% TRACE_BUF_LEN; /* seek record 
header */
-''' % {'event_id': event.num, 'sizestr': event.sizestr,}
+''' % {'event_id': num, 'sizestr': event.sizestr,}
 
         if argc > 0:
             str = event.arglist
@@ -220,7 +220,7 @@ def stderr_h(events):
 #include "trace/stderr.h"
 
 extern TraceEvent trace_list[];'''
-    for event in events:
+    for num, event in enumerate(events):
         argnames = event.argnames
         if event.argc > 0:
             argnames = ', ' + event.argnames
@@ -235,12 +235,12 @@ static inline void trace_%(name)s(%(args)s)
 }''' % {
     'name': event.name,
     'args': event.args,
-    'event_num': event.num,
+    'event_num': num,
     'fmt': event.fmt.rstrip('\n'),
     'argnames': argnames
 }
     print
-    print '#define NR_TRACE_EVENTS %d' % (event.num + 1)
+    print '#define NR_TRACE_EVENTS %d' % len(events)
 
 def stderr_c(events):
     print '''#include "trace.h"
@@ -475,8 +475,7 @@ import re
 cre = re.compile("(?P<name>[^(\s]+)\((?P<args>[^)]*)\)\s*(?P<fmt>\".*\")?")
 
 class Event(object):
-    def __init__(self, num, line):
-        self.num = num
+    def __init__(self, line):
         m = cre.match(line)
         assert m is not None
         groups = m.groupdict('')
@@ -491,14 +490,12 @@ class Event(object):
 # Generator that yields Event objects given a trace-events file object
 def read_events(fobj):
     res = []
-    event_num = 0
     for line in fobj:
         if not line.strip():
             continue
         if line.lstrip().startswith('#'):
            continue
-       res.append(Event(event_num, line))
-       event_num += 1
+       res.append(Event(line))
     return res
 
 backend = ""