WebRTC: Add Libfuzzer commit and trybot.

scripts/slave/recipes/webrtc/libfuzzer.py

+# Copyright 2015 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.
+
+from recipe_engine.types import freeze
+
+
+DEPS = [
+  'archive',
+  'bot_update',
+  'chromium',
+  'file',
+  'recipe_engine/json',
+  'recipe_engine/path',
+  'recipe_engine/platform',
+  'recipe_engine/properties',
+  'recipe_engine/python',
+  'recipe_engine/raw_io',
+  'recipe_engine/step',
+  'webrtc',
+]
+
+
+BUILDERS = freeze({
+  'client.webrtc': {
+    'builders': {
+      'Linux64 Release (Libfuzzer)': {
+        'recipe_config': 'webrtc',
+        'chromium_config_kwargs': {
+          'BUILD_CONFIG': 'Release',
+          'TARGET_BITS': 64,
+        },
+        'chromium_apply_config': ['webrtc_libfuzzer'],
+        'bot_type': 'builder',
+        'testing': {'platform': 'linux'},
+      },
+    },
+  },
+  'tryserver.webrtc': {
+    'builders': {
+      'linux_libfuzzer_rel': {
+        'recipe_config': 'webrtc',
+        'chromium_config_kwargs': {
+          'BUILD_CONFIG': 'Release',
+          'TARGET_BITS': 64,
+        },
+        'chromium_apply_config': ['webrtc_libfuzzer'],
+        'bot_type': 'builder',
+        'testing': {'platform': 'linux'},
+      },
+    },
+  },
+})
+
+
+def RunSteps(api):
+  webrtc = api.webrtc
+  webrtc.apply_bot_config(BUILDERS, webrtc.RECIPE_CONFIGS)
+
+  api.webrtc.checkout()
+  api.chromium.runhooks()
+
+  # checkout llvm
+  api.step('checkout llvm',
+           [api.path.sep.join(['tools', 'clang', 'scripts', 'update.py']),
+            '--force-local-build',
+            '--without-android'],
+           cwd=api.path['checkout'],
+           env={'LLVM_FORCE_HEAD_REVISION': 'YES'})
+
+  api.chromium.run_gn(use_goma=False)
+
+  step_result = api.python('calculate targets',
+          api.path['depot_tools'].join('gn.py'),
+          ['--root=%s' % str(api.path['checkout']),
+           'refs',
+           str(api.chromium.output_dir),
+           '--all',
+           '--type=executable',
+           '--as=output',
+           '//webrtc/test/fuzzers:webrtc_fuzzer_main',
+          ],
+          stdout=api.raw_io.output())
+
+  targets = step_result.stdout.split()
+  api.step.active_result.presentation.logs['targets'] = targets
+  api.chromium.compile(targets=targets)
+
+
+def GenTests(api):
+  for test in api.chromium.gen_tests_for_builders(BUILDERS):
+    yield (test +
+           api.step_data('calculate targets',
+               stdout=api.raw_io.output('target1 target2 target3'))
+           )
+