ncv/ncval-annotate.py

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