xnu-2782.20.48.tar.gz

[apple/xnu.git] / bsd / kern / makekdebugevents.py

diff --git a/bsd/kern/makekdebugevents.py b/bsd/kern/makekdebugevents.py
new file mode 100755 (executable)
index 0000000..73b2db4
--- /dev/null
+++ b/bsd/kern/makekdebugevents.py
@@ -0,0 +1,38 @@
+#!/usr/bin/python
+#
+# This script scans the trace.codes file, containing a mapping of event id to
+# event name for all events, and writes to stdout a C declaration for a table
+# named kd_events[] or these mappings.
+# Required to generate a header file used by DEVELOPMENT and DEBUG kernels.
+#
+ 
+import sys
+import re
+
+# we expect one arg specifying the path to the trace.codes file
+if (len(sys.argv) < 2):
+    exit(1)
+trace_code_file = sys.argv[1]
+
+# regular expression pattern to match <hex_id> <string>
+id_name_pattern = re.compile('0x([0-9a-fA-F]+)\s+([^\s]*)')
+code_table = []
+
+# scan file to generate internal table
+with open(trace_code_file, 'rt') as codes:
+    for line in codes:
+       m = id_name_pattern.match(line)
+       if m:
+            code_table += [(int(m.group(1),base=16), m.group(2))]
+
+# emit typedef:
+print "typedef struct {"
+print "        uint32_t   id;"
+print "        const char *name;"
+print "} kd_event_t;"
+# emit structure declaration and sorted initialization:
+print "kd_event_t kd_events[] = {"
+for mapping in sorted(code_table, key=lambda x: x[0]):
+        print "        {0x%x, \"%s\"}," % mapping
+print "};"
+