deps: update V8 to 7.6.303.28

PR-URL: https://github.com/nodejs/node/pull/28016
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/deps/v8/src/objects/allocation-site-scopes.h b/deps/v8/src/objects/allocation-site-scopes.h
new file mode 100644
index 0000000000..8f5fb42986
--- /dev/null
+++ b/deps/v8/src/objects/allocation-site-scopes.h
@@ -0,0 +1,69 @@
+// Copyright 2013 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_OBJECTS_ALLOCATION_SITE_SCOPES_H_
+#define V8_OBJECTS_ALLOCATION_SITE_SCOPES_H_
+
+#include "src/handles/handles.h"
+#include "src/objects/allocation-site.h"
+#include "src/objects/map.h"
+#include "src/objects/objects.h"
+
+namespace v8 {
+namespace internal {
+
+// AllocationSiteContext is the base class for walking and copying a nested
+// boilerplate with AllocationSite and AllocationMemento support.
+class AllocationSiteContext {
+ public:
+  explicit AllocationSiteContext(Isolate* isolate) { isolate_ = isolate; }
+
+  Handle<AllocationSite> top() { return top_; }
+  Handle<AllocationSite> current() { return current_; }
+
+  bool ShouldCreateMemento(Handle<JSObject> object) { return false; }
+
+  Isolate* isolate() { return isolate_; }
+
+ protected:
+  void update_current_site(AllocationSite site) {
+    *(current_.location()) = site.ptr();
+  }
+
+  inline void InitializeTraversal(Handle<AllocationSite> site);
+
+ private:
+  Isolate* isolate_;
+  Handle<AllocationSite> top_;
+  Handle<AllocationSite> current_;
+};
+
+// AllocationSiteUsageContext aids in the creation of AllocationMementos placed
+// behind some/all components of a copied object literal.
+class AllocationSiteUsageContext : public AllocationSiteContext {
+ public:
+  AllocationSiteUsageContext(Isolate* isolate, Handle<AllocationSite> site,
+                             bool activated)
+      : AllocationSiteContext(isolate),
+        top_site_(site),
+        activated_(activated) {}
+
+  inline Handle<AllocationSite> EnterNewScope();
+
+  inline void ExitScope(Handle<AllocationSite> scope_site,
+                        Handle<JSObject> object);
+
+  inline bool ShouldCreateMemento(Handle<JSObject> object);
+
+  static const bool kCopying = true;
+
+ private:
+  Handle<AllocationSite> top_site_;
+  bool activated_;
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_OBJECTS_ALLOCATION_SITE_SCOPES_H_