1 files changed, 100 insertions, 0 deletions

diff --git a/meta/recipes-kernel/perf/perf/sort-pmuevents.py b/meta/recipes-kernel/perf/perf/sort-pmuevents.py
new file mode 100755
index 0000000000..0a87e553ab
--- /dev/null
+++ b/meta/recipes-kernel/perf/perf/sort-pmuevents.py
@@ -0,0 +1,100 @@
+#!/usr/bin/env python3
+
+# perf pmu-events sorting tool
+#
+# Copyright (C) 2021 Bruce Ashfield
+#
+# SPDX-License-Identifier: MIT
+#
+
+import sys
+import os
+import re
+from collections import OrderedDict
+
+if len(sys.argv) < 2:
+    print( "[ERROR]: input and output pmu files missing" )
+    sys.exit(1)
+
+if len(sys.argv) < 3:
+    print( "[ERROR]: output pmu file missing" )
+    sys.exit(1)
+
+infile = sys.argv[1]
+outfile = sys.argv[2]
+
+if not os.path.exists(infile):
+    print( "ERROR. input file does not exist: %s" % infile )
+    sys.exit(1)
+
+if os.path.exists(outfile):
+    print( "WARNING. output file will be overwritten: %s" % infile )
+
+with open(infile, 'r') as file:
+    data = file.read()
+
+preamble_regex = re.compile( '^(.*?)^(struct|const struct|static struct|static const struct)', re.MULTILINE | re.DOTALL )
+
+preamble = re.search( preamble_regex, data )
+struct_block_regex = re.compile(r'^(struct|const struct|static struct|static const struct).*?(\w+) (.*?)\[\] = {(.*?)^};', re.MULTILINE | re.DOTALL )
+field_regex =  re.compile(r'{.*?},', re.MULTILINE | re.DOTALL )
+cpuid_regex = re.compile(r'\.cpuid = (.*?),', re.MULTILINE | re.DOTALL )
+name_regex = re.compile(r'\.name = (.*?),', re.MULTILINE | re.DOTALL )
+
+# create a dictionary structure to store all the structs, their
+# types and then their fields.
+entry_dict = {}
+for struct in re.findall( struct_block_regex, data ):
+    # print( "struct: %s %s %s" % (struct[0],struct[1],struct[2]) )
+    entry_dict[struct[2]] = {}
+    entry_dict[struct[2]]['type_prefix'] = struct[0]
+    entry_dict[struct[2]]['type'] = struct[1]
+    entry_dict[struct[2]]['fields'] = {}
+    for entry in re.findall( field_regex, struct[3] ):
+        #print( "    entry: %s" % entry )
+        cpuid = re.search( cpuid_regex, entry )
+        if cpuid:
+            #print( "    cpuid found: %s" % cpuid.group(1) )
+            entry_dict[struct[2]]['fields'][cpuid.group(1)] = entry
+
+        name = re.search( name_regex, entry )
+        if name:
+            #print( "    name found: %s" % name.group(1) )
+            entry_dict[struct[2]]['fields'][name.group(1)] = entry
+
+        # unmatched entries are most likely array terminators and
+        # should end up as the last element in the sorted list, which
+        # is achieved by using '0' as the key
+        if not cpuid and not name:
+            entry_dict[struct[2]]['fields']['0'] = entry
+
+# created ordered dictionaries from the captured values. These are ordered by
+# a sorted() iteration of the keys. We don't care about the order we read
+# things, just the sorted order. Hency why we couldn't create these during
+# reading.
+#
+# yes, there's a more concise way to do this, but our nested dictionaries of
+# fields make it complex enough that it becomes unreadable.
+entry_dict_sorted = OrderedDict()
+for i in sorted(entry_dict.keys()):
+    entry_dict_sorted[i] = {}
+    entry_dict_sorted[i]['type_prefix'] = entry_dict[i]['type_prefix']
+    entry_dict_sorted[i]['type'] = entry_dict[i]['type']
+    entry_dict_sorted[i]['fields'] = {}
+    for f in sorted(entry_dict[i]['fields'].keys()):
+        entry_dict_sorted[i]['fields'][f] = entry_dict[i]['fields'][f] 
+
+# dump the sorted elements to the outfile
+outf = open( outfile, 'w' )
+
+print( preamble.group(1) )
+outf.write( preamble.group(1) )
+for d in entry_dict_sorted:
+    outf.write( "%s %s %s[] = {\n" % (entry_dict_sorted[d]['type_prefix'], entry_dict_sorted[d]['type'],d) )
+    for f in entry_dict_sorted[d]['fields']:
+        outf.write( entry_dict_sorted[d]['fields'][f] + '\n' )
+
+    outf.write( "};\n" )
+
+outf.close()
+