ncv/ncval-annotate.py

   1 #!/usr/bin/env python
   2
   3 # Annotate the output of ncval with line numbers, taken from debugging
   4 # information using binutils' addr2line.
   5
   6 import linecache
   7 import os
   8 import re
   9 import subprocess
  10 import sys
  11
  12
  13 ncval = os.path.join(os.path.dirname(__file__),
  14                      "../scons-out/dbg-linux/staging/ncval")
  15
  16
  17 objdump_regexp = re.compile(r"\s*([0-9a-f]+):")
  18
  19
  20 def main(args):
  21     obj_file = args[0]
  22
  23     def disassemble_address(addr):
  24         proc = subprocess.Popen(
  25             ["objdump", "-d", obj_file, "--start-address", "0x" + addr,
  26              "--stop-address", "0x%x" % (int(addr, 16) + 16)],
  27             stdout=subprocess.PIPE)
  28         for line in proc.stdout:
  29             match = objdump_regexp.match(line)
  30             if match is not None:
  31                 sys.stdout.write(line)
  32                 break
  33
  34     def decode_address(addr):
  35         proc = subprocess.Popen(
  36             ["addr2line", "-f", "-i", "-e", obj_file, addr],
  37             stdout=subprocess.PIPE)
  38         for info in proc.stdout:
  39             sys.stdout.write("  %s: %s" % (addr, info))
  40             if ":" in info:
  41                 filename, lineno = info.split(":", 1)
  42                 src_line = linecache.getline(filename, int(lineno))
  43                 if src_line != "":
  44                     sys.stdout.write("    " + src_line.lstrip())
  45
  46     proc = subprocess.Popen([ncval, obj_file], stdout=subprocess.PIPE)
  47     regexp = re.compile("[0-9a-f]{3,}")
  48     for line in proc.stdout:
  49         sys.stdout.write(line)
  50         if line.startswith("VALIDATOR:"):
  51             match = regexp.search(line)
  52             if match is not None:
  53                 addr = match.group()
  54                 disassemble_address(addr)
  55                 decode_address(addr)
  56
  57
  58 if __name__ == "__main__":
  59     main(sys.argv[1:])