Fix the prefix removal in patch_orderfile.py.

tools/cygprofile/patch_orderfile.py

 #!/usr/bin/python
 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import commands
 import os
 import sys
 
 orderfile = sys.argv[1]
@@ skipping 45 matching lines @@
     elif (addr < nm_addr):
       return binary_search (addr, start, halfway)
     elif (addr >= nm_addr + sym_size):
       return binary_search (addr, halfway, end)
     else:
       raise Exception("ERROR: did not expect this case")
 
 f = open (orderfile)
 lines = f.readlines()
 profiled_list = []
-prefixes = ['.text.', '.text.startup.', '.text.hot.', '.text.unlikely.']
+prefixes = ['.text.startup.', '.text.hot.', '.text.unlikely.', '.text.']
 for line in lines:
   for prefix in prefixes:
     line = line.replace(prefix, '')
   functionName = line.split('.clone.')[0].strip()
   if (functionName == ''):
     continue
   profiled_list.append(functionName)
 
 # Symbol names are not unique.  Since the order file uses symbol names, the
 # patched order file pulls in all symbols with the same name.  Multiple function
@@ skipping 10 matching lines @@
   functionAddress = int (line.split()[0].strip(), 16)
   try:
     functionAddressMap[functionName].append(functionAddress)
   except Exception:
     functionAddressMap[functionName] = [functionAddress]
     functions.append(functionName)
 
 sys.stderr.write ("profiled list size: " + str(len(profiled_list)) + "\n")
 addresses = []
 symbols_found = 0
+missing_symbols = 0
 for function in profiled_list:
    try:
      addrs = functionAddressMap[function]
      symbols_found = symbols_found + 1
    except Exception:
      addrs = []
-     # sys.stderr.write ("WARNING: could not find symbol " + function + "\n")
+     missing_symbols += 1
+     if missing_symbols < 100:
+       sys.stderr.write ("WARNING: could not find symbol " + function + "\n")
    for addr in addrs:
      if not (addr in addresses):
        addresses.append(addr)
 sys.stderr.write ("symbols found: " + str(symbols_found) + "\n")

[pasko-google - do not use, 2015/01/19 18:36:50]

can we also print the amount of missing symbols here (if any)?

 
 sys.stderr.write ("number of addresses: " + str(len(addresses)) + "\n")
 total_size = 0
 for addr in addresses:
   (functions, size) = binary_search (addr, 0, len(uniqueAddrs))
   total_size = total_size + size
   for function in functions:
     for prefix in prefixes:
       print prefix + function
 
 # The following is needed otherwise Gold only applies a partial sort.
 print '.text'    # gets methods not in a section, such as assembly
 print '.text.*'  # gets everything else
 sys.stderr.write ("total_size: " + str(total_size) + "\n")