V8: Add s390 bots.

scripts/slave/recipe_modules/v8/builders.py

 # Copyright 2014 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.
 
 # Contains the bulk of the V8 builder configurations so they can be reused
 # from multiple recipes.
 
 from recipe_engine.types import freeze
 
 
@@ skipping 1510 matching lines @@
           'default_hard_timeout': 4 * 60 * 60,
         },
         'tests': [Deopt],
         'testing': {'platform': 'linux'},
       },
     },
   },
 ####### Waterfall: client.v8.ports
   'client.v8.ports': {
     'builders': {
+      'V8 Linux - s390 - sim': {
+        'chromium_apply_config': [
+          'clang', 'v8_ninja', 'goma', 'simulate_s390'],
+        'v8_config_kwargs': {
+          'BUILD_CONFIG': 'Release',
+          'TARGET_BITS': 32,
+        },
+        'bot_type': 'builder_tester',
+        'tests': [V8Testing],
+        'testing': {'platform': 'linux'},
+      },
+      'V8 Linux - s390x - sim': {
+        'chromium_apply_config': [
+          'clang', 'v8_ninja', 'goma', 'simulate_s390'],
+        'v8_config_kwargs': {
+          'BUILD_CONFIG': 'Release',
+          'TARGET_BITS': 64,

[kjellander_chromium, 2016/04/06 15:09:59]

So the x in s390x means 64-bit?

[Michael Achenbach, 2016/04/06 16:03:18]

s390x has 64 while s390 has 31 bits (yes 1). I don't really know if the bitness
of the target arch plays any role. Guess not. It's just important that the
simulator runs the correct v8 code.

[Sergiy Byelozyorov, 2016/04/06 16:42:07]

Wow! How does this work?

[Michael Achenbach, 2016/04/06 17:36:44]

The internet has probably a lot of reading material :)
Like: https://en.wikipedia.org/wiki/IBM_ESA/390

+        },
+        'bot_type': 'builder_tester',
+        'tests': [V8Testing],
+        'testing': {'platform': 'linux'},
+      },
       'V8 Linux - x87 - nosnap - debug builder': {
         'v8_apply_config': ['no_snapshot'],
         'chromium_apply_config': [
           'v8_ninja', 'default_compiler', 'goma', 'no_snapshot',  'x87'],
         'v8_config_kwargs': {
           'BUILD_CONFIG': 'Debug',
           'TARGET_BITS': 32,
         },
         'bot_type': 'builder',
         'build_gs_archive': 'linux_x87_nosnap_dbg_archive',
@@ skipping 960 matching lines @@
 dart_win_release['chromium_apply_config'].extend(['v8_ninja', 'msvs2013'])
 
 BUILDERS = freeze(BUILDERS)
 BRANCH_BUILDERS = freeze(BRANCH_BUILDERS)
 
 def iter_builders():
   for mastername, master_config in BUILDERS.iteritems():
     builders = master_config['builders']
     for buildername, bot_config in builders.iteritems():
       yield mastername, builders, buildername, bot_config