Allow several build directories to be specified to search for symbols

mojo/devtools/common/android_stack_parser/symbol.py

 # Copyright (C) 2013 The Android Open Source Project
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #      http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
 """Module for looking up symbolic debugging information.
 
 The information can include symbol names, offsets, and source locations.
 """
 
 import glob
 import itertools
 import os
 import re
 import subprocess
 import zipfile
 
 NDK_DIR = ""
-BUILD_DIR = ""
+BUILD_DIRS = []
 SYMBOLS_DIR = ""
 
 ARCH = "arm"
 
 TOOLCHAIN_INFO = None
 
 def Uname():
   """'uname' for constructing prebuilt/<...> and out/host/<...> paths."""
   uname = os.uname()[0]
   proc = os.uname()[-1]
@@ skipping 144 matching lines @@
   """Returns a list of candidate filenames.
 
   Args:
     filepart: the file part of the pathname.
     candidate_fun: a function to apply to each candidate, returns a list.
     relative_dirs: a list of relative directory names to search from.
 
   Returns:
     A list of candidate files ordered by modification time, newest first.
   """
-  candidates = [BUILD_DIR]
+  candidates = list(BUILD_DIRS)
 
   if relative_dirs:
     candidates = PathListJoin(candidates, relative_dirs)
 
   candidates = PathListJoin(candidates, [filepart])
   candidates = list(
       itertools.chain.from_iterable(map(candidate_fun, candidates)))
   candidates = sorted(candidates, key=os.path.getmtime, reverse=True)
   return candidates
 
@@ skipping 350 matching lines @@
   process.stdin.write("\n")
   process.stdin.close()
   demangled_symbol = process.stdout.readline().strip()
   process.stdout.close()
   return demangled_symbol
 
 def FormatSymbolWithOffset(symbol, offset):
   if offset == 0:
     return symbol
   return "%s+%d" % (symbol, offset)