[test] Add mksnapshot stress test suite

tools/testrunner/local/utils.py

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 13 matching lines @@
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
 import os
 from os.path import exists
 from os.path import isdir
 from os.path import join
 import platform
+import random
 import re
 import subprocess
 import urllib2
 
 
 def GetSuitePaths(test_root):
   return [ f for f in os.listdir(test_root) if isdir(join(test_root, f)) ]
 
 
+def RandomSeed():
+  seed = 0
+  while not seed:
+    seed = random.SystemRandom().randint(-2147483648, 2147483647)
+  return seed
+
+
 # Reads a file into an array of strings
 def ReadLinesFrom(name):
   lines = []
   with open(name) as f:
     for line in f:
       if line.startswith('#'): continue
       if '#' in line:
         line = line[:line.find('#')]
       line = line.strip()
       if not line: continue
@@ skipping 97 matching lines @@
   if isinstance(obj, dict):
     return FrozenDict((k, Freeze(v)) for k, v in obj.iteritems())
   elif isinstance(obj, set):
     return frozenset(obj)
   elif isinstance(obj, list):
     return tuple(Freeze(item) for item in obj)
   else:
     # Make sure object is hashable.
     hash(obj)
     return obj