tools/cygprofile/patch_orderfile.py

   1 #!/usr/bin/python
   2 # Copyright 2013 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 import commands
   7 import os
   8 import sys
   9
  10 orderfile = sys.argv[1]
  11 uninstrumented_shlib = sys.argv[2]
  12
  13 nmlines_uninstrumented = commands.getoutput ('nm -S -n ' +
  14    uninstrumented_shlib + '  | egrep "( t )|( W )|( T )"').split('\n')
  15
  16 nmlines = []
  17 for nmline in nmlines_uninstrumented:
  18   if (len(nmline.split()) == 4):
  19     nmlines.append(nmline)
  20
  21 # Map addresses to list of functions at that address.  There are multiple
  22 # functions at an address because of aliasing.
  23 nm_index = 0
  24 uniqueAddrs = []
  25 addressMap = {}
  26 while nm_index < len(nmlines):
  27   if (len(nmlines[nm_index].split()) == 4):
  28     nm_int = int (nmlines[nm_index].split()[0], 16)
  29     size = int (nmlines[nm_index].split()[1], 16)
  30     fnames = [nmlines[nm_index].split()[3]]
  31     nm_index = nm_index + 1
  32     while nm_index < len(nmlines) and nm_int == int (
  33         nmlines[nm_index].split()[0], 16):
  34       fnames.append(nmlines[nm_index].split()[3])
  35       nm_index = nm_index + 1
  36     addressMap[nm_int] = fnames
  37     uniqueAddrs.append((nm_int, size))
  38   else:
  39     nm_index = nm_index + 1
  40
  41 def binary_search (addr, start, end):
  42   # print "addr: " + str(addr) + " start: " + str(start) + " end: " + str(end)
  43   if start >= end or start == end - 1:
  44     (nm_addr, size) = uniqueAddrs[start]
  45     if not (addr >= nm_addr and addr < nm_addr + size):
  46       sys.stderr.write ("ERROR: did not find function in binary: addr: " +
  47           hex(addr) + " nm_addr: " + str(nm_addr) + " start: " + str(start) +
  48           " end: " + str(end) + "\n")
  49       raise Error("error")
  50     return (addressMap[nm_addr], size)
  51   else:
  52     halfway = start + ((end - start) / 2)
  53     (nm_addr, size) = uniqueAddrs[halfway]
  54     # print "nm_addr: " + str(nm_addr) + " halfway: " + str(halfway)
  55     if (addr >= nm_addr and addr < nm_addr + size):
  56       return (addressMap[nm_addr], size)
  57     elif (addr < nm_addr):
  58       return binary_search (addr, start, halfway)
  59     elif (addr >= nm_addr + size):
  60       return binary_search (addr, halfway, end)
  61     else:
  62       raise "ERROR: did not expect this case"
  63
  64 f = open (orderfile)
  65 lines = f.readlines()
  66 profiled_list = []
  67 for line in lines:
  68   if (line.strip() == ''):
  69     continue
  70   functionName = line.replace('.text.', '').split('.clone.')[0].strip()
  71   profiled_list.append (functionName)
  72
  73 # Symbol names are not unique.  Since the order file uses symbol names, the
  74 # patched order file pulls in all symbols with the same name.  Multiple function
  75 # addresses for the same function name may also be due to ".clone" symbols,
  76 # since the substring is stripped.
  77 functions = []
  78 functionAddressMap = {}
  79 for line in nmlines:
  80   try:
  81     functionName = line.split()[3]
  82   except:
  83     functionName = line.split()[2]
  84   functionName = functionName.split('.clone.')[0]
  85   functionAddress = int (line.split()[0].strip(), 16)
  86   try:
  87     functionAddressMap[functionName].append(functionAddress)
  88   except:
  89     functionAddressMap[functionName] = [functionAddress]
  90     functions.append(functionName)
  91
  92 sys.stderr.write ("profiled list size: " + str(len(profiled_list)) + "\n")
  93 addresses = []
  94 symbols_found = 0
  95 for function in profiled_list:
  96    try:
  97      addrs = functionAddressMap[function]
  98      symbols_found = symbols_found + 1
  99    except:
 100      addrs = []
 101      # sys.stderr.write ("WARNING: could not find symbol " + function + "\n")
 102    for addr in addrs:
 103      if not (addr in addresses):
 104        addresses.append(addr)
 105 sys.stderr.write ("symbols found: " + str(symbols_found) + "\n")
 106
 107 sys.stderr.write ("number of addresses: " + str(len(addresses)) + "\n")
 108 total_size = 0
 109 for addr in addresses:
 110   # if (count % 500 == 0):
 111   #    print "current count: " + str(count)
 112   (functions, size) = binary_search (addr, 0, len(uniqueAddrs))
 113   total_size = total_size + size
 114   for function in functions:
 115     print ".text." + function
 116   print ""
 117 sys.stderr.write ("total_size: " + str(total_size) + "\n")