Mesa (main): bin: Add a script for filtering/sorting refcount logs

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Module: Mesa
Branch: main
Commit: 0bcb5f919ed5c6ecac7395fd06c6bc71601dbd86
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0bcb5f919ed5c6ecac7395fd06c6bc71601dbd86

Author: Jesse Natalie <jenatali at microsoft.com>
Date:   Tue Apr 26 12:36:09 2022 -0700

bin: Add a script for filtering/sorting refcount logs

Reviewed-by: Sil Vilerino <sivileri at microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16182>

---

 bin/refcnt-log-helper.py | 78 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)

diff --git a/bin/refcnt-log-helper.py b/bin/refcnt-log-helper.py
new file mode 100644
index 00000000000..d703f023389
--- /dev/null
+++ b/bin/refcnt-log-helper.py
@@ -0,0 +1,78 @@
+#!/usr/bin/env python3
+# Copyright © Microsoft Corporation
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice (including the next
+# paragraph) shall be included in all copies or substantial portions of the
+# Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+
+import argparse
+
+# Take a log file produced by GALLIUM_REFCNT_LOG, filter it to the objects that
+# weren't destroyed by the end of the log, and write the results out sorted.
+# Strips stacks by default to prevent OOM. Could probably be rewritten to walk
+# the file twice to preserve stacks without OOM, but this was the easy way.
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--input',
+                        action='store',
+                        required=True,
+                        help='path to file containing refcount log')
+    parser.add_argument('--output',
+                        action='store',
+                        required=True,
+                        help='path to trimmed log')
+    parser.add_argument('--filter',
+                        help='object type filter')
+    parser.add_argument('--keep-stacks',
+                        help='keep stacks, otherwise only headers')
+    args = parser.parse_args()
+
+    objects = {}
+
+    with open(args.input) as in_file:
+        stack = []
+        cur_object = ''
+
+        for line in in_file:
+            if line[0] == '<':
+
+                parts = line.split(' ')
+                prev_object = cur_object
+                cur_object = parts[1]
+                if parts[3].strip() == 'Destroy':
+                    if cur_object in objects:
+                        del objects[cur_object]
+                else:
+                    if parts[3].strip() == 'Create':
+                        if (not args.filter) or (args.filter in parts[0]):
+                            objects[cur_object] = []
+                    if prev_object in objects:
+                        objects[prev_object] += stack
+
+                stack = [line]
+            elif args.keep_stacks:
+                stack += line
+
+    with open(args.output, 'wt') as out_file:
+        for stack in objects.values():
+            for stack_line in stack:
+                out_file.write(stack_line)
+
+
+if __name__ == '__main__':
+    main()