Add tracepoint_variable_sized_types.py

scripts/tracepoint_variable_sized_types.py

+# This script lists all the types in the kernel's tracepoint format files
+# which appear with more than one size. This script's output should be
+# compared to the code in TracepointFormatParser::adjust_integer_types()
+
+import glob
+
+field_types = {}
+
+for format_file in glob.iglob("/sys/kernel/debug/tracing/events/*/*/format"):
+    for line in open(format_file):
+        if not line.startswith("\tfield:"):
+            continue
+
+        size_section = line.split(";")[2].split(":")
+        if size_section[0] != "\tsize":
+            continue
+        size_val = size_section[1]
+
+        field_section = line.split(";")[0].split(":")
+        if field_section[0] != "\tfield":
+            continue
+        field_val = field_section[1]
+        if "[" in field_val or "*" in field_val:
+            continue
+
+        field_type = " ".join(field_val.split()[:-1])
+
+        if field_type not in field_types:
+            field_types[field_type] = set()
+        field_types[field_type].add(size_val)
+
+for t in sorted(field_types):
+    sizes = field_types[t]
+    if len(sizes) > 1:
+        sizes_str = ",".join(sorted(sizes))
+        print(f"{t}: {sizes_str}")