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[PULL 02/14] simpletrace: annotate magic constants from QEMU code
From: |
Stefan Hajnoczi |
Subject: |
[PULL 02/14] simpletrace: annotate magic constants from QEMU code |
Date: |
Thu, 28 Sep 2023 09:43:55 -0400 |
From: Mads Ynddal <m.ynddal@samsung.com>
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>
---
scripts/simpletrace.py | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/scripts/simpletrace.py b/scripts/simpletrace.py
index b221d9a241..5c230a1b74 100755
--- a/scripts/simpletrace.py
+++ b/scripts/simpletrace.py
@@ -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
--
2.41.0
- [PULL 00/14] Tracing patches, Stefan Hajnoczi, 2023/09/28
- [PULL 02/14] simpletrace: annotate magic constants from QEMU code,
Stefan Hajnoczi <=
- [PULL 03/14] simpletrace: improve parsing of sys.argv; fix files never closed., Stefan Hajnoczi, 2023/09/28
- [PULL 05/14] simpletrace: update code for Python 3.11, Stefan Hajnoczi, 2023/09/28
- [PULL 06/14] simpletrace: improved error handling on struct unpack, Stefan Hajnoczi, 2023/09/28
- [PULL 08/14] simpletrace: made Analyzer into context-manager, Stefan Hajnoczi, 2023/09/28
- [PULL 01/14] simpletrace: add __all__ to define public interface, Stefan Hajnoczi, 2023/09/28
- [PULL 07/14] simpletrace: define exception and add handling, Stefan Hajnoczi, 2023/09/28
- [PULL 11/14] simpletrace: move event processing to Analyzer class, Stefan Hajnoczi, 2023/09/28
- [PULL 10/14] simpletrace: move logic of process into internal function, Stefan Hajnoczi, 2023/09/28
- [PULL 09/14] simpletrace: refactor to separate responsibilities, Stefan Hajnoczi, 2023/09/28
- [PULL 04/14] simpletrace: changed naming of edict and idtoname to improve readability, Stefan Hajnoczi, 2023/09/28