deps: update V8 to 5.1.281.69

Pick up the latest branch-head for V8 5.1. This branch brings in
improved language support and performance improvements. For full
details: http://v8project.blogspot.com/2016/04/v8-release-51.html

* Picks up the latest branch head for 5.1 [1]
* Edit v8 gitignore to allow trace_event copy
* Update V8 DEP trace_event as per deps/v8/DEPS [2]

[1] https://chromium.googlesource.com/v8/v8.git/+/dc81244
[2] https://chromium.googlesource.com/chromium/src/base/trace_event/common/+/c8c8665

PR-URL: https://github.com/nodejs/node/pull/7016
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

1 files changed, 128 insertions, 0 deletions

diff --git a/deps/v8/test/cctest/interpreter/interpreter-tester.h b/deps/v8/test/cctest/interpreter/interpreter-tester.h
new file mode 100644
index 0000000000..f8a0a8a67a
--- /dev/null
+++ b/deps/v8/test/cctest/interpreter/interpreter-tester.h
@@ -0,0 +1,128 @@
+// Copyright 2015 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 "src/v8.h"
+
+#include "src/execution.h"
+#include "src/handles.h"
+#include "src/interpreter/bytecode-array-builder.h"
+#include "src/interpreter/interpreter.h"
+#include "test/cctest/cctest.h"
+#include "test/cctest/test-feedback-vector.h"
+
+namespace v8 {
+namespace internal {
+namespace interpreter {
+
+MaybeHandle<Object> CallInterpreter(Isolate* isolate,
+                                    Handle<JSFunction> function);
+template <class... A>
+static MaybeHandle<Object> CallInterpreter(Isolate* isolate,
+                                           Handle<JSFunction> function,
+                                           A... args) {
+  Handle<Object> argv[] = {args...};
+  return Execution::Call(isolate, function,
+                         isolate->factory()->undefined_value(), sizeof...(args),
+                         argv);
+}
+
+template <class... A>
+class InterpreterCallable {
+ public:
+  InterpreterCallable(Isolate* isolate, Handle<JSFunction> function)
+      : isolate_(isolate), function_(function) {}
+  virtual ~InterpreterCallable() {}
+
+  MaybeHandle<Object> operator()(A... args) {
+    return CallInterpreter(isolate_, function_, args...);
+  }
+
+ private:
+  Isolate* isolate_;
+  Handle<JSFunction> function_;
+};
+
+namespace {
+const char kFunctionName[] = "f";
+}  // namespace
+
+class InterpreterTester {
+ public:
+  InterpreterTester(Isolate* isolate, const char* source,
+                    MaybeHandle<BytecodeArray> bytecode,
+                    MaybeHandle<TypeFeedbackVector> feedback_vector,
+                    const char* filter);
+
+  InterpreterTester(Isolate* isolate, Handle<BytecodeArray> bytecode,
+                    MaybeHandle<TypeFeedbackVector> feedback_vector =
+                        MaybeHandle<TypeFeedbackVector>(),
+                    const char* filter = kFunctionName);
+
+  InterpreterTester(Isolate* isolate, const char* source,
+                    const char* filter = kFunctionName);
+
+  virtual ~InterpreterTester();
+
+  template <class... A>
+  InterpreterCallable<A...> GetCallable() {
+    return InterpreterCallable<A...>(isolate_, GetBytecodeFunction<A...>());
+  }
+
+  Local<Message> CheckThrowsReturnMessage();
+
+  static Handle<Object> NewObject(const char* script);
+
+  static Handle<String> GetName(Isolate* isolate, const char* name);
+
+  static std::string SourceForBody(const char* body);
+
+  static std::string function_name();
+
+ private:
+  Isolate* isolate_;
+  const char* source_;
+  MaybeHandle<BytecodeArray> bytecode_;
+  MaybeHandle<TypeFeedbackVector> feedback_vector_;
+
+  template <class... A>
+  Handle<JSFunction> GetBytecodeFunction() {
+    Handle<JSFunction> function;
+    if (source_) {
+      CompileRun(source_);
+      v8::Local<v8::Context> context =
+          v8::Isolate::GetCurrent()->GetCurrentContext();
+      Local<Function> api_function =
+          Local<Function>::Cast(CcTest::global()
+                                    ->Get(context, v8_str(kFunctionName))
+                                    .ToLocalChecked());
+      function = Handle<JSFunction>::cast(v8::Utils::OpenHandle(*api_function));
+    } else {
+      int arg_count = sizeof...(A);
+      std::string source("(function " + function_name() + "(");
+      for (int i = 0; i < arg_count; i++) {
+        source += i == 0 ? "a" : ", a";
+      }
+      source += "){})";
+      function = Handle<JSFunction>::cast(v8::Utils::OpenHandle(
+          *v8::Local<v8::Function>::Cast(CompileRun(source.c_str()))));
+      function->ReplaceCode(
+          *isolate_->builtins()->InterpreterEntryTrampoline());
+    }
+
+    if (!bytecode_.is_null()) {
+      function->shared()->set_function_data(*bytecode_.ToHandleChecked());
+    }
+    if (!feedback_vector_.is_null()) {
+      function->shared()->set_feedback_vector(
+          *feedback_vector_.ToHandleChecked());
+    }
+    return function;
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(InterpreterTester);
+};
+
+}  // namespace interpreter
+}  // namespace internal
+}  // namespace v8