deps: update V8 to 7.7.299.4

PR-URL: https://github.com/nodejs/node/pull/28918
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/deps/v8/src/codegen/tick-counter.h b/deps/v8/src/codegen/tick-counter.h
new file mode 100644
index 0000000000..8d6c966bb0
--- /dev/null
+++ b/deps/v8/src/codegen/tick-counter.h
@@ -0,0 +1,28 @@
+// Copyright 2019 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.
+
+#ifndef V8_CODEGEN_TICK_COUNTER_H_
+#define V8_CODEGEN_TICK_COUNTER_H_
+
+#include <cstddef>
+
+namespace v8 {
+namespace internal {
+
+// A deterministic correlate of time, used to detect performance or
+// divergence bugs in Turbofan. DoTick() should be called frequently
+// thoughout the compilation.
+class TickCounter {
+ public:
+  void DoTick();
+  size_t CurrentTicks() const { return ticks_; }
+
+ private:
+  size_t ticks_ = 0;
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_CODEGEN_TICK_COUNTER_H_