simpletrace: annotate magic constants from QEMU code

It wasn't clear where the constants and structs came from, so I added
comments to help.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Mads Ynddal <m.ynddal@samsung.com>
Message-id: 20230926103436.25700-3-mads@ynddal.dk
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Mads Ynddal 2023-09-26 12:34:24 +02:00 committed by Stefan Hajnoczi
parent 2c109f2199
commit 8405ec6ab6

View file

@ -16,6 +16,11 @@
__all__ = ['Analyzer', 'process', 'run']
# This is the binary format that the QEMU "simple" trace backend
# emits. There is no specification documentation because the format is
# not guaranteed to be stable. Trace files must be parsed with the
# same trace-events-all file and the same simpletrace.py file that
# QEMU was built with.
header_event_id = 0xffffffffffffffff
header_magic = 0xf2b177cb0aa429b4
dropped_event_id = 0xfffffffffffffffe