deps: update V8 to 7.4.288.13

PR-URL: https://github.com/nodejs/node/pull/26685
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>

1 files changed, 17 insertions, 7 deletions

diff --git a/deps/v8/src/zone/zone-segment.h b/deps/v8/src/zone/zone-segment.h
index 206edc7d64..2bc2f7f1ca 100644
--- a/deps/v8/src/zone/zone-segment.h
+++ b/deps/v8/src/zone/zone-segment.h
@@ -15,20 +15,24 @@
 namespace v8 {
 namespace internal {
 
-//  Forward declaration
+// Forward declarations.
+class AccountingAllocator;
 class Zone;
 
 class Segment {
  public:
-  void Initialize(size_t size) { size_ = size; }
-
   Zone* zone() const { return zone_; }
   void set_zone(Zone* const zone) { zone_ = zone; }
 
   Segment* next() const { return next_; }
   void set_next(Segment* const next) { next_ = next; }
 
-  size_t size() const { return size_; }
+  // {total_size} returns the allocated size including the bookkeeping bytes of
+  // the {Segment}.
+  size_t total_size() const { return size_; }
+
+  // {capacity} returns the number of storage bytes in this {Segment}, i.e.
+  // {end() - start()}.
   size_t capacity() const { return size_ - sizeof(Segment); }
 
   Address start() const { return address(sizeof(Segment)); }
@@ -40,6 +44,11 @@ class Segment {
   void ZapHeader();
 
  private:
+  // Segments are only created by the AccountingAllocator.
+  friend class AccountingAllocator;
+
+  explicit Segment(size_t size) : size_(size) {}
+
 #ifdef DEBUG
   // Constant byte value used for zapping dead memory in debug mode.
   static const unsigned char kZapDeadByte = 0xcd;
@@ -50,10 +59,11 @@ class Segment {
     return reinterpret_cast<Address>(this) + n;
   }
 
-  Zone* zone_;
-  Segment* next_;
-  size_t size_;
+  Zone* zone_ = nullptr;
+  Segment* next_ = nullptr;
+  const size_t size_;
 };
+
 }  // namespace internal
 }  // namespace v8