[test] Add mksnapshot stress test suite

tools/run-tests.py

Index: tools/run-tests.py
diff --git a/tools/run-tests.py b/tools/run-tests.py
index c445a6359f7fab961cbd3bb20d777dc180ccc17e..4d42416e1fc1862781b8b7b8690d744ad2586ea0 100755
--- a/tools/run-tests.py
+++ b/tools/run-tests.py
@@ -36,7 +36,6 @@ import optparse
 import os
 from os.path import getmtime, isdir, join
 import platform
-import random
 import shlex
 import subprocess
 import sys
@@ -75,6 +74,7 @@ TEST_MAP = {
     "preparser",
     "intl",
     "unittests",
+    "mksnapshot",
   ],
   # This needs to stay in sync with test/default.isolate.
   "default": [
@@ -87,6 +87,7 @@ TEST_MAP = {
     "preparser",
     "intl",
     "unittests",
+    "mksnapshot",
   ],
   # This needs to stay in sync with test/optimize_for_size.isolate.
   "optimize_for_size": [
@@ -373,13 +374,6 @@ def BuildOptions():
   return result
 
 
-def RandomSeed():
-  seed = 0
-  while not seed:
-    seed = random.SystemRandom().randint(-2147483648, 2147483647)
-  return seed
-
-
 def BuildbotToV8Mode(config):
   """Convert buildbot build configs to configs understood by the v8 runner.
 
@@ -554,7 +548,7 @@ def ProcessOptions(options):
     options.j = multiprocessing.cpu_count()
 
   if options.random_seed_stress_count <= 1 and options.random_seed == 0:
-    options.random_seed = RandomSeed()
+    options.random_seed = utils.RandomSeed()
 
   def excl(*args):
     """Returns true if zero or one of multiple arguments are true."""
@@ -619,6 +613,9 @@ def ProcessOptions(options):
     TEST_MAP["default"].remove("debugger")
     TEST_MAP["bot_default"].remove("debugger")
     TEST_MAP["optimize_for_size"].remove("debugger")
+  if options.no_snap:
+    TEST_MAP["bot_default"].remove("mksnapshot")
+    TEST_MAP["default"].remove("mksnapshot")
   return True
 
 
@@ -807,6 +804,7 @@ def Execute(arch, mode, args, options, suites):
   all_tests = []
   num_tests = 0
   for s in suites:
+    s.Setup()
     s.ReadStatusFile(variables)
     s.ReadTestCases(ctx)
     if len(args) > 0:
@@ -836,7 +834,7 @@ def Execute(arch, mode, args, options, suites):
           if options.random_seed:
             yield []
           else:
-            yield ["--random-seed=%d" % RandomSeed()]
+            yield ["--random-seed=%d" % utils.RandomSeed()]
       s.tests = [
         t.CopyAddingFlags(t.variant, flags)
         for t in variant_tests
@@ -896,7 +894,12 @@ def Execute(arch, mode, args, options, suites):
   else:
     runner = execution.Runner(suites, progress_indicator, ctx)
 
-  exit_code = runner.Run(options.j)
+  try:
+    exit_code = runner.Run(options.j)
+  finally:
+    for s in suites:
+      s.TearDown()
+
   overall_duration = time.time() - start_time
 
   if options.time: