[Swarming] Isolate deopt fuzzer.

This also ports a few changes from run-test.py to make sure
cwd = v8 root directory.

BUG=chromium:535160
LOG=n

Review URL: https://codereview.chromium.org/1707963003

Cr-Commit-Position: refs/heads/master@{#34110}

build/all.gyp

@@ -38,6 +38,7 @@
             '../test/webkit/webkit.gyp:*',
             '../tools/check-static-initializers.gyp:*',
             '../tools/gcmole/run_gcmole.gyp:*',
+            '../tools/run-deopt-fuzzer.gyp:*',
             '../tools/run-valgrind.gyp:*',
           ],
         }],

tools/run-deopt-fuzzer.gyp

+# Copyright 2016 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+  'conditions': [
+    ['test_isolation_mode != "noop"', {
+      'targets': [
+        {
+          'target_name': 'run_deopt_fuzzer_run',
+          'type': 'none',
+          'dependencies': [
+            '../src/d8.gyp:d8_run',
+          ],
+          'includes': [
+            '../build/features.gypi',
+            '../build/isolate.gypi',
+          ],
+          'sources': [
+            'run-deopt-fuzzer.isolate',
+          ],
+        },
+      ],
+    }],
+  ],
+}

tools/run-deopt-fuzzer.isolate

+# Copyright 2016 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+{
+  'variables': {
+    'command': [
+      'run-deopt-fuzzer.py',
+    ],
+    'files': [
+      'run-deopt-fuzzer.py',
+    ],
+  },
+  'includes': [
+    'testrunner/testrunner.isolate',
+    '../src/d8.isolate',
+    '../test/mjsunit/mjsunit.isolate',
+    '../test/webkit/webkit.isolate',
+  ],
+}

tools/run-deopt-fuzzer.py

@@ -48,6 +48,9 @@ from testrunner.local import verbose
 from testrunner.objects import context
 
 
+# Base dir of the v8 checkout to be used as cwd.
+BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+
 ARCH_GUESS = utils.DefaultArch()
 DEFAULT_TESTS = ["mjsunit", "webkit"]
 TIMEOUT_DEFAULT = 60
@@ -290,6 +293,9 @@ def ShardTests(tests, shard_count, shard_run):
 
 
 def Main():
+  # Use the v8 root as cwd as some test cases use "load" with relative paths.
+  os.chdir(BASE_DIR)
+
   parser = BuildOptions()
   (options, args) = parser.parse_args()
   if not ProcessOptions(options):
@@ -297,9 +303,8 @@ def Main():
     return 1
 
   exit_code = 0
-  workspace = os.path.abspath(join(os.path.dirname(sys.argv[0]), ".."))
 
-  suite_paths = utils.GetSuitePaths(join(workspace, "test"))
+  suite_paths = utils.GetSuitePaths(join(BASE_DIR, "test"))
 
   if len(args) == 0:
     suite_paths = [ s for s in suite_paths if s in DEFAULT_TESTS ]
@@ -314,7 +319,7 @@ def Main():
   suites = []
   for root in suite_paths:
     suite = testsuite.TestSuite.LoadTestSuite(
-        os.path.join(workspace, "test", root))
+        os.path.join(BASE_DIR, "test", root))
     if suite:
       suite.SetupWorkingDirectory()
       suites.append(suite)
@@ -326,7 +331,7 @@ def Main():
   for mode in options.mode:
     for arch in options.arch:
       try:
-        code = Execute(arch, mode, args, options, suites, workspace)
+        code = Execute(arch, mode, args, options, suites, BASE_DIR)
         exit_code = exit_code or code
       except KeyboardInterrupt:
         return 2