Add scripts for using cygprofile to repository

tools/cygprofile/patch_orderfile.py

+#!/usr/bin/python
+# Copyright (c) 2011 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]
+uninstrumented_shlib = sys.argv[2]
+
+nmlines_uninstrumented = commands.getoutput ('nm -S -n ' +
+   uninstrumented_shlib + '  | egrep "( t )|( W )|( T )"').split('\n')
+
+nmlines = []
+for nmline in nmlines_uninstrumented:
+  if (len(nmline.split()) == 4):
+    nmlines.append(nmline)
+
+# Map addresses to list of functions at that address.  There are multiple
+# functions at an address because of aliasing.
+nm_index = 0
+uniqueAddrs = []
+addressMap = {}
+while nm_index < len(nmlines):
+  if (len(nmlines[nm_index].split()) == 4):
+    nm_int = int (nmlines[nm_index].split()[0], 16)
+    size = int (nmlines[nm_index].split()[1], 16)
+    fnames = [nmlines[nm_index].split()[3]]
+    nm_index = nm_index + 1
+    while nm_index < len(nmlines) and nm_int == int (
+        nmlines[nm_index].split()[0], 16):
+      fnames.append(nmlines[nm_index].split()[3])
+      nm_index = nm_index + 1
+    addressMap[nm_int] = fnames
+    uniqueAddrs.append((nm_int, size))
+  else:
+    nm_index = nm_index + 1
+
+def binary_search (addr, start, end):
+  # print "addr: " + str(addr) + " start: " + str(start) + " end: " + str(end)
+  if start >= end or start == end - 1:
+    (nm_addr, size) = uniqueAddrs[start]
+    if not (addr >= nm_addr and addr < nm_addr + size):
+      sys.stderr.write ("ERROR: did not find function in binary: addr: " +
+          hex(addr) + " nm_addr: " + str(nm_addr) + " start: " + str(start) +
+          " end: " + str(end) + "\n")
+      raise Error("error")
+    return (addressMap[nm_addr], size)
+  else:
+    halfway = start + ((end - start) / 2)
+    (nm_addr, size) = uniqueAddrs[halfway]
+    # print "nm_addr: " + str(nm_addr) + " halfway: " + str(halfway)
+    if (addr >= nm_addr and addr < nm_addr + size):
+      return (addressMap[nm_addr], size)
+    elif (addr < nm_addr):
+      return binary_search (addr, start, halfway)
+    elif (addr >= nm_addr + size):
+      return binary_search (addr, halfway, end)
+    else:
+      raise "ERROR: did not expect this case"
+
+f = open (orderfile)
+lines = f.readlines()
+profiled_list = []
+for line in lines:
+  if (line.strip() == ''):
+    continue
+  functionName = line.replace('.text.', '').split('.clone.')[0].strip()
+  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
+# addresses for the same function name may also be due to ".clone" symbols,
+# since the substring is stripped.
+functions = []
+functionAddressMap = {}
+for line in nmlines:
+  try:
+    functionName = line.split()[3]
+  except:
+    functionName = line.split()[2]
+  functionName = functionName.split('.clone.')[0]
+  functionAddress = int (line.split()[0].strip(), 16)
+  try:
+    functionAddressMap[functionName].append(functionAddress)
+  except:
+    functionAddressMap[functionName] = [functionAddress]
+    functions.append(functionName)
+
+sys.stderr.write ("profiled list size: " + str(len(profiled_list)) + "\n")
+addresses = []
+symbols_found = 0
+for function in profiled_list:
+   try:
+     addrs = functionAddressMap[function]
+     symbols_found = symbols_found + 1
+   except:
+     addrs = []
+     # 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")
+
+sys.stderr.write ("number of addresses: " + str(len(addresses)) + "\n")
+total_size = 0
+for addr in addresses:
+  # if (count % 500 == 0):
+  #    print "current count: " + str(count)
+  (functions, size) = binary_search (addr, 0, len(uniqueAddrs))
+  total_size = total_size + size
+  for function in functions:
+    print ".text." + function
+  print ""
+sys.stderr.write ("total_size: " + str(total_size) + "\n")