Add a basic compiler dispatcher

test/unittests/compiler-dispatcher/compiler-dispatcher-unittest.cc

+// 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.
+
+#include <memory>
+
+#include "src/compiler-dispatcher/compiler-dispatcher.h"
+#include "src/flags.h"
+#include "src/handles.h"
+#include "src/objects-inl.h"
+#include "test/unittests/compiler-dispatcher/compiler-dispatcher-helper.h"
+#include "test/unittests/test-utils.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace v8 {
+namespace internal {
+
+typedef TestWithContext CompilerDispatcherTest;
+
+TEST_F(CompilerDispatcherTest, Construct) {
+  std::unique_ptr<CompilerDispatcher> dispatcher(
+      new CompilerDispatcher(i_isolate(), FLAG_stack_size));
+}
+
+TEST_F(CompilerDispatcherTest, IsEnqueued) {
+  std::unique_ptr<CompilerDispatcher> dispatcher(
+      new CompilerDispatcher(i_isolate(), FLAG_stack_size));
+
+  const char script[] =
+      "function g() { var y = 1; function f(x) { return x * y }; return f; } "
+      "g();";
+  Handle<JSFunction> f = Handle<JSFunction>::cast(RunJS(isolate(), script));
+  Handle<SharedFunctionInfo> shared(f->shared(), i_isolate());
+
+  ASSERT_FALSE(dispatcher->IsEnqueued(shared));
+  ASSERT_TRUE(dispatcher->Enqueue(shared));
+  ASSERT_TRUE(dispatcher->IsEnqueued(shared));
+  dispatcher->Abort(shared, CompilerDispatcher::BlockingBehavior::kBlock);
+  ASSERT_FALSE(dispatcher->IsEnqueued(shared));
+}
+
+TEST_F(CompilerDispatcherTest, FinishNow) {
+  std::unique_ptr<CompilerDispatcher> dispatcher(
+      new CompilerDispatcher(i_isolate(), FLAG_stack_size));
+
+  const char script[] =
+      "function g() { var y = 1; function f(x) { return x * y }; return f; } "
+      "g();";
+  Handle<JSFunction> f = Handle<JSFunction>::cast(RunJS(isolate(), script));
+  Handle<SharedFunctionInfo> shared(f->shared(), i_isolate());
+
+  ASSERT_FALSE(shared->HasBaselineCode());
+  // Can't finish a SFI that isn't enqueued.
+  ASSERT_FALSE(dispatcher->FinishNow(shared));
+  ASSERT_TRUE(dispatcher->Enqueue(shared));
+  ASSERT_TRUE(dispatcher->FinishNow(shared));
+  // Finishing removes the SFI from the queue.
+  ASSERT_FALSE(dispatcher->IsEnqueued(shared));
+  ASSERT_TRUE(shared->HasBaselineCode());
+}
+
+}  // namespace internal
+}  // namespace v8