Deep Memory Profiler: skip non-existing or empty files.

tools/deep_memory_profiler/dmprof.py

 # Copyright (c) 2012 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.
 
 """The deep heap profiler script for Chrome."""
 
 import copy
 import datetime
 import json
 import logging
@@ skipping 689 matching lines @@
 
   def load(self, prefix):
     """Loads all related bucket files.
 
     Args:
         prefix: A prefix string for bucket file names.
     """
     LOGGER.info('Loading bucket files.')
 
     n = 0
+    skipped = 0
     while True:
       path = '%s.%04d.buckets' % (prefix, n)
-      if not os.path.exists(path):
-        if n > 10:
+      if not os.path.exists(path) or not os.stat(path).st_size:
+        if skipped > 10:
           break
         n += 1
+        skipped += 1
         continue
       LOGGER.info('  %s' % path)
       with open(path, 'r') as f:
         self._load_file(f)
       n += 1
+      skipped = 0
 
   def _load_file(self, bucket_f):
     for line in bucket_f:
       words = line.split()
       typeinfo = None
       typeinfo_name = ''
       stacktrace_begin = 2
       for index, word in enumerate(words):
         if index < 2:
           continue
@@ skipping 404 matching lines @@
     else:
       return {}
 
   @staticmethod
   def _find_all_dumps(dump_path):
     prefix = Command._find_prefix(dump_path)
     dump_path_list = [dump_path]
 
     n = int(dump_path[len(dump_path) - 9 : len(dump_path) - 5])
     n += 1
+    skipped = 0
     while True:
       p = '%s.%04d.heap' % (prefix, n)
-      if os.path.exists(p):
+      if os.path.exists(p) and os.stat(p).st_size:
         dump_path_list.append(p)
       else:
-        break
+        if skipped > 10:
+          break
+        skipped += 1
       n += 1
 
     return dump_path_list
 
   @staticmethod
   def _find_all_buckets(dump_path):
     prefix = Command._find_prefix(dump_path)
     bucket_path_list = []
 
     n = 0
@@ skipping 653 matching lines @@
     errorcode = COMMANDS[action]().do(sys.argv)
   except ParsingException, e:
     errorcode = 1
     sys.stderr.write('Exit by parsing error: %s\n' % e)
 
   return errorcode
 
 
 if __name__ == '__main__':
   sys.exit(main())