bsd/kern/makekdebugevents.py

   1 #!/usr/bin/python
   2 #
   3 # This script scans the trace.codes file, containing a mapping of event id to
   4 # event name for all events, and writes to stdout a C declaration for a table
   5 # named kd_events[] or these mappings.
   6 # Required to generate a header file used by DEVELOPMENT and DEBUG kernels.
   7 #
   8
   9 import sys
  10 import re
  11
  12 # we expect one arg specifying the path to the trace.codes file
  13 if (len(sys.argv) < 2):
  14     exit(1)
  15 trace_code_file = sys.argv[1]
  16
  17 # regular expression pattern to match <hex_id> <string>
  18 id_name_pattern = re.compile('0x([0-9a-fA-F]+)\s+([^\s]*)')
  19 code_table = []
  20
  21 # scan file to generate internal table
  22 with open(trace_code_file, 'rt') as codes:
  23     for line in codes:
  24         m = id_name_pattern.match(line)
  25         if m:
  26             code_table += [(int(m.group(1),base=16), m.group(2))]
  27
  28 # emit typedef:
  29 print "typedef struct {"
  30 print "        uint32_t   id;"
  31 print "        const char *name;"
  32 print "} kd_event_t;"
  33 # emit structure declaration and sorted initialization:
  34 print "kd_event_t kd_events[] = {"
  35 for mapping in sorted(code_table, key=lambda x: x[0]):
  36         print "        {0x%x, \"%s\"}," % mapping
  37 print "};"
  38