diff options
| -rwxr-xr-x | scripts/simpletrace.py | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/scripts/simpletrace.py b/scripts/simpletrace.py index 2a977e2ab9..a3a6315055 100755 --- a/scripts/simpletrace.py +++ b/scripts/simpletrace.py @@ -97,11 +97,17 @@ def read_trace_header(fobj): raise ValueError('Log format %d not supported with this QEMU release!' % log_version) -def read_trace_records(edict, fobj): - """Deserialize trace records from a file, yielding record tuples (event_num, timestamp, pid, arg1, ..., arg6).""" - idtoname = { - dropped_event_id: "dropped" - } +def read_trace_records(edict, idtoname, fobj): + """Deserialize trace records from a file, yielding record tuples (event_num, timestamp, pid, arg1, ..., arg6). + + Note that `idtoname` is modified if the file contains mapping records. + + Args: + edict (str -> Event): events dict, indexed by name + idtoname (int -> str): event names dict, indexed by event ID + fobj (file): input file + + """ while True: t = fobj.read(8) if len(t) == 0: @@ -171,10 +177,16 @@ def process(events, log, analyzer, read_header=True): dropped_event = Event.build("Dropped_Event(uint64_t num_events_dropped)") edict = {"dropped": dropped_event} + idtoname = {dropped_event_id: "dropped"} for event in events: edict[event.name] = event + # If there is no header assume event ID mapping matches events list + if not read_header: + for event_id, event in enumerate(events): + idtoname[event_id] = event.name + def build_fn(analyzer, event): if isinstance(event, str): return analyzer.catchall @@ -197,7 +209,7 @@ def process(events, log, analyzer, read_header=True): analyzer.begin() fn_cache = {} - for rec in read_trace_records(edict, log): + for rec in read_trace_records(edict, idtoname, log): event_num = rec[0] event = edict[event_num] if event_num not in fn_cache: |