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trace: include filename when printing parser error messages

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Improves error messages from:

  ValueError: Error on line 72: need more than 1 value to unpack

To

  ValueError: Error at /home/berrange/src/virt/qemu/trace-events:72:
    need more than 1 value to unpack

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180306154650.24075-1-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2018-03-06 15:46:50 +00:00 • committed by Stefan Hajnoczi
parent e42860ae83
commit 86b5aacfb9
3 changed files with 7 additions and 5 deletions
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4
scripts/simpletrace.py
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@ -168,7 +168,7 @@ class Analyzer(object):
def process(events, log, analyzer, read_header=True):
"""Invoke an analyzer on each event in a log."""
if isinstance(events, str):
events = read_events(open(events, 'r'))
events = read_events(open(events, 'r'), events)
if isinstance(log, str):
log = open(log, 'rb')
@ -233,7 +233,7 @@ def run(analyzer):
'<trace-file>\n' % sys.argv[0])
sys.exit(1)
events = read_events(open(sys.argv[1], 'r'))
events = read_events(open(sys.argv[1], 'r'), sys.argv[1])
process(events, sys.argv[2], analyzer, read_header=read_header)
if __name__ == '__main__':