Port Skia recipe to normal Python scripts, move to Skia repo

infra/bots/flavor/xsan_flavor.py

Index: infra/bots/flavor/xsan_flavor.py
diff --git a/infra/bots/flavor/xsan_flavor.py b/infra/bots/flavor/xsan_flavor.py
new file mode 100644
index 0000000000000000000000000000000000000000..5807be0180e5c8df85940ac02664c012975cd4dc
--- /dev/null
+++ b/infra/bots/flavor/xsan_flavor.py
@@ -0,0 +1,54 @@
+#!/usr/bin/env python
+#
+# Copyright 2016 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+
+"""Utils for running under *SAN"""
+
+
+import default_flavor
+import os
+
+
+class XSanFlavorUtils(default_flavor.DefaultFlavorUtils):
+  def __init__(self, *args, **kwargs):
+    super(XSanFlavorUtils, self).__init__(*args, **kwargs)
+    self._sanitizer = {
+      # We'd love to just pass 'address,undefined' and get all the checks, but
+      # we're not anywhere close to being able to do that.  Instead we start
+      # with a set of checks that we know pass or nearly pass.  See here for
+      # more information:
+      # http://clang.llvm.org/docs/UsersManual.html#controlling-code-generation
+      'ASAN': ('address,bool,function,integer-divide-by-zero,nonnull-attribute,'
+               'null,object-size,return,returns-nonnull-attribute,shift,'
+               'signed-integer-overflow,unreachable,vla-bound,vptr'),
+      # MSAN and TSAN can't run together with ASAN, so they're their own bots.
+      'MSAN': 'memory',
+      'TSAN': 'thread',
+    }[self._bot_info.bot_cfg['extra_config']]
+
+  def compile(self, target):
+    cmd = [os.path.join(self._bot_info.skia_dir, 'tools', 'xsan_build'),
+           self._sanitizer, target]
+    self._bot_info.run(cmd)
+
+  def step(self, cmd, env=None, **kwargs):
+    """Wrapper for the Step API; runs a step as appropriate for this flavor."""
+    lsan_suppressions = self._bot_info.skia_dir.join('tools', 'lsan.supp')
+    tsan_suppressions = self._bot_info.skia_dir.join('tools', 'tsan.supp')
+    ubsan_suppressions = self._bot_info.skia_dir.join('tools', 'ubsan.supp')
+    env = dict(env or {})
+    env['ASAN_OPTIONS'] = 'symbolize=1 detect_leaks=1'
+    env['LSAN_OPTIONS'] = ('symbolize=1 print_suppressions=1 suppressions=%s' %
+                           lsan_suppressions)
+    env['TSAN_OPTIONS'] = 'suppressions=%s' % tsan_suppressions
+    env['UBSAN_OPTIONS'] = 'suppressions=%s' % ubsan_suppressions
+
+    path_to_app = os.path.join(self._bot_info.out_dir,
+                               self._bot_info.configuration, cmd[0])
+    new_cmd = [path_to_app]
+    new_cmd.extend(cmd[1:])
+    return self._bot_info.run(new_cmd, env=env, **kwargs)