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authorJose Ricardo Ziviani <joserz@linux.vnet.ibm.com>2017-05-29 13:30:04 -0300
committerStefan Hajnoczi <stefanha@redhat.com>2017-06-07 14:34:19 +0100
commit249e9f792c4c6e52058570e83b550ec8310f621e (patch)
tree607ce517c3e0fbb32e0ee37e9d72f426e26678a8 /scripts/simpletrace.py
parent0db1851becbefe3e50cfc03776fb1f75817376af (diff)
simpletrace: Improve the error message if event is not declared
Today, if we use a trace-event file which does not declare an event existing in the log file we'll get the following error: $ scripts/simpletrace.py trace-events trace-68508 Traceback (most recent call last): File "scripts/simpletrace.py", line 242, in <module> run(Formatter()) File "scripts/simpletrace.py", line 217, in run process(events, sys.argv[2], analyzer, read_header=read_header) File "scripts/simpletrace.py", line 192, in process for rec in read_trace_records(edict, log): File "scripts/simpletrace.py", line 107, in read_trace_records rec = read_record(edict, idtoname, fobj) File "scripts/simpletrace.py", line 71, in read_record return get_record(edict, idtoname, rechdr, fobj) File "scripts/simpletrace.py", line 45, in get_record event = edict[name] KeyError: 'qemu_mutex_locked' This patch improves this error by adding a hint instead of just that KeyError log: $ scripts/simpletrace.py trace-events trace-68508 'qemu_mutex_locked' event is logged but is not declared in the trace events file, try using trace-events-all instead. Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 1496075404-8845-1-git-send-email-joserz@linux.vnet.ibm.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'scripts/simpletrace.py')
-rwxr-xr-xscripts/simpletrace.py10
1 files changed, 9 insertions, 1 deletions
diff --git a/scripts/simpletrace.py b/scripts/simpletrace.py
index d60b3a08f7..f1be6e419a 100755
--- a/scripts/simpletrace.py
+++ b/scripts/simpletrace.py
@@ -42,7 +42,15 @@ def get_record(edict, idtoname, rechdr, fobj):
event_id = rechdr[0]
name = idtoname[event_id]
rec = (name, rechdr[1], rechdr[3])
- event = edict[name]
+ try:
+ event = edict[name]
+ except KeyError, e:
+ import sys
+ sys.stderr.write('%s event is logged but is not declared ' \
+ 'in the trace events file, try using ' \
+ 'trace-events-all instead.\n' % str(e))
+ sys.exit(1)
+
for type, name in event.args:
if is_string(type):
l = fobj.read(4)