Add infrastructure for skipping tests in GC stress mode.

tools/run-tests.py

 #!/usr/bin/env python
 #
 # 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
@@ skipping 50 matching lines @@
 
 VARIANTS = ["default", "stress", "nocrankshaft"]
 
 MODE_FLAGS = {
     "debug"   : ["--nobreak-on-abort", "--nodead-code-elimination",
                  "--nofold-constants", "--enable-slow-asserts",
                  "--debug-code", "--verify-heap"],
     "release" : ["--nobreak-on-abort", "--nodead-code-elimination",
                  "--nofold-constants"]}
 
+GC_STRESS_FLAGS = ["--gc-interval=500", "--stress-compaction",
+                   "--concurrent-recompilation-queue-length=64",
+                   "--concurrent-recompilation-delay=500",
+                   "--concurrent-recompilation"]
+
 SUPPORTED_ARCHS = ["android_arm",
                    "android_ia32",
                    "arm",
                    "ia32",
                    "mipsel",
                    "nacl_ia32",
                    "nacl_x64",
                    "x64"]
 # Double the timeout for these:
 SLOW_ARCHS = ["android_arm",
@@ skipping 20 matching lines @@
                     default=False, action="store_true")
   result.add_option("--flaky-tests",
                     help="Regard tests marked as flaky (run|skip|dontcare)",
                     default="dontcare")
   result.add_option("--slow-tests",
                     help="Regard slow tests (run|skip|dontcare)",
                     default="dontcare")
   result.add_option("--pass-fail-tests",
                     help="Regard pass|fail tests (run|skip|dontcare)",
                     default="dontcare")
+  result.add_option("--gc-stress",
+                    help="Switch on GC stress mode",
+                    default=False, action="store_true")
   result.add_option("--command-prefix",
                     help="Prepended to each shell command used to run a test",
                     default="")
   result.add_option("--download-data", help="Download missing test suite data",
                     default=False, action="store_true")
   result.add_option("--extra-flags",
                     help="Additional flags to pass to each test command",
                     default="")
   result.add_option("--isolates", help="Whether to test isolates",
                     default=False, action="store_true")
@@ skipping 92 matching lines @@
   if options.buildbot:
     # Buildbots run presubmit tests as a separate step.
     options.no_presubmit = True
     options.no_network = True
   if options.command_prefix:
     print("Specifying --command-prefix disables network distribution, "
           "running tests locally.")
     options.no_network = True
   options.command_prefix = shlex.split(options.command_prefix)
   options.extra_flags = shlex.split(options.extra_flags)
+
+  if options.gc_stress:
+    options.extra_flags += GC_STRESS_FLAGS
+
   if options.j == 0:
     options.j = multiprocessing.cpu_count()
 
   def excl(*args):
     """Returns true if zero or one of multiple arguments are true."""
     return reduce(lambda x, y: x + y, args) <= 1
 
   if not excl(options.no_stress, options.stress_only, options.no_variants,
               bool(options.variants), options.quickcheck):
     print("Use only one of --no-stress, --stress-only, --no-variants, "
@@ skipping 133 matching lines @@
   timeout *= TIMEOUT_SCALEFACTOR[mode]
   ctx = context.Context(arch, mode, shell_dir,
                         mode_flags, options.verbose,
                         timeout, options.isolates,
                         options.command_prefix,
                         options.extra_flags,
                         options.no_i18n)
 
   # Find available test suites and read test cases from them.
   variables = {
+    "arch": arch,
+    "deopt_fuzzer": False,
+    "gc_stress": options.gc_stress,
+    "isolates": options.isolates,
     "mode": mode,
-    "arch": arch,
+    "no_i18n": options.no_i18n,
     "system": utils.GuessOS(),
-    "isolates": options.isolates,
-    "deopt_fuzzer": False,
-    "no_i18n": options.no_i18n,
   }
   all_tests = []
   num_tests = 0
   test_id = 0
   for s in suites:
     s.ReadStatusFile(variables)
     s.ReadTestCases(ctx)
     if len(args) > 0:
       s.FilterTestCasesByArgs(args)
     all_tests += s.tests
@@ skipping 62 matching lines @@
   except KeyboardInterrupt:
     raise
 
   if options.time:
     verbose.PrintTestDurations(suites, overall_duration)
   return exit_code
 
 
 if __name__ == "__main__":
   sys.exit(Main())