[interpreter] Adds interpreter cctests.

test/cctest/interpreter/test-interpreter.cc

+// Copyright 2014 the V8 project authors. All rights reserved.

[oth, 2015/07/30 09:49:01]

s/2014/2015/

[rmcilroy, 2015/07/30 11:02:17]

Done, thanks.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/v8.h"
+
+#include "src/execution.h"
+#include "src/handles.h"
+#include "src/interpreter/interpreter.h"
+#include "test/cctest/cctest.h"
+
+namespace v8 {
+namespace internal {
+
+class InterpreterTester {
+ public:
+  InterpreterTester(Isolate* isolate, Handle<BytecodeArray> bytecode)
+      : isolate_(isolate), function_(GetBytecodeFunction(isolate, bytecode)) {
+    i::FLAG_ignition = true;
+    // TODO(rmcilroy): don't regenerate if it's already generated.
+    isolate_->interpreter()->Initialize(isolate_);
+  }
+  virtual ~InterpreterTester() {}
+
+  MaybeHandle<Object> Call() {
+    Handle<Object> args[] = {};
+    return Execution::Call(isolate_, function_,
+                           isolate_->factory()->undefined_value(), 0, args,
+                           false);
+  }
+
+ private:
+  Isolate* isolate_;
+  Handle<JSFunction> function_;
+
+  static Handle<JSFunction> GetBytecodeFunction(
+      Isolate* isolate, Handle<BytecodeArray> bytecode_array) {
+    Handle<JSFunction> function = v8::Utils::OpenHandle(
+        *v8::Handle<v8::Function>::Cast(CompileRun("(function(){})")));
+    function->ReplaceCode(*isolate->builtins()->InterpreterEntryTrampoline());
+    function->shared()->set_function_data(*bytecode_array);
+    return function;
+  }
+};
+
+}  // namespace internal
+}  // namespace v8
+
+using namespace v8::internal;
+
+TEST(TestInterpreterReturn) {
+  InitializedHandleScope handles;
+  Handle<Object> undefined_value =
+      handles.main_isolate()->factory()->undefined_value();
+  // TODO(rmcilroy): Use a proper bytecode builder for this.
+  uint8_t raw_bytecodes[1] = {1};
+  Handle<BytecodeArray> bytecode_array =
+      handles.main_isolate()->factory()->NewBytecodeArray(1, raw_bytecodes,
+                                                          kPointerSize);
+  InterpreterTester tester(handles.main_isolate(), bytecode_array);
+  Handle<Object> return_val = tester.Call().ToHandleChecked();
+  CHECK(return_val.is_identical_to(undefined_value));
+}
+
+
+TEST(TestInterpreterLiteral0) {
+  InitializedHandleScope handles;
+  // TODO(rmcilroy): Use a proper bytecode builder for this.
+  uint8_t raw_bytecodes[3] = {0, 0, 1};
+  Handle<BytecodeArray> bytecode_array =
+      handles.main_isolate()->factory()->NewBytecodeArray(3, raw_bytecodes,
+                                                          kPointerSize);
+  InterpreterTester tester(handles.main_isolate(), bytecode_array);
+  Handle<Object> return_val = tester.Call().ToHandleChecked();
+  CHECK_EQ(*return_val, i::Smi::FromInt(0));
+}