Upgrade V8 binaries for 9.7.106.18 version

deps/include/cppgc/allocation.h

@@ -18,6 +18,23 @@
 #include "cppgc/type-traits.h"
 #include "v8config.h"  // NOLINT(build/include_directory)
 
+#if defined(__has_attribute)
+#if __has_attribute(assume_aligned)
+#define CPPGC_DEFAULT_ALIGNED \
+  __attribute__((assume_aligned(api_constants::kDefaultAlignment)))
+#define CPPGC_DOUBLE_WORD_ALIGNED \
+  __attribute__((assume_aligned(2 * api_constants::kDefaultAlignment)))
+#endif  // __has_attribute(assume_aligned)
+#endif  // defined(__has_attribute)
+
+#if !defined(CPPGC_DEFAULT_ALIGNED)
+#define CPPGC_DEFAULT_ALIGNED
+#endif
+
+#if !defined(CPPGC_DOUBLE_WORD_ALIGNED)
+#define CPPGC_DOUBLE_WORD_ALIGNED
+#endif
+
 namespace cppgc {
 
 /**
@@ -27,6 +44,9 @@ class AllocationHandle;
 
 namespace internal {
 
+// Similar to C++17 std::align_val_t;
+enum class AlignVal : size_t {};
+
 class V8_EXPORT MakeGarbageCollectedTraitInternal {
  protected:
   static inline void MarkObjectAsFullyConstructed(const void* payload) {
@@ -45,32 +65,72 @@ class V8_EXPORT MakeGarbageCollectedTraitInternal {
     atomic_mutable_bitfield->store(value, std::memory_order_release);
   }
 
-  template <typename U, typename CustomSpace>
-  struct SpacePolicy {
-    static void* Allocate(AllocationHandle& handle, size_t size) {
-      // Custom space.
+  // Dispatch based on compile-time information.
+  //
+  // Default implementation is for a custom space with >`kDefaultAlignment` byte
+  // alignment.
+  template <typename GCInfoType, typename CustomSpace, size_t alignment>
+  struct AllocationDispatcher final {
+    static void* Invoke(AllocationHandle& handle, size_t size) {
       static_assert(std::is_base_of<CustomSpaceBase, CustomSpace>::value,
                     "Custom space must inherit from CustomSpaceBase.");
+      static_assert(
+          !CustomSpace::kSupportsCompaction,
+          "Custom spaces that support compaction do not support allocating "
+          "objects with non-default (i.e. word-sized) alignment.");
       return MakeGarbageCollectedTraitInternal::Allocate(
-          handle, size, internal::GCInfoTrait<U>::Index(),
-          CustomSpace::kSpaceIndex);
+          handle, size, static_cast<AlignVal>(alignment),
+          internal::GCInfoTrait<GCInfoType>::Index(), CustomSpace::kSpaceIndex);
+    }
+  };
+
+  // Fast path for regular allocations for the default space with
+  // `kDefaultAlignment` byte alignment.
+  template <typename GCInfoType>
+  struct AllocationDispatcher<GCInfoType, void,
+                              api_constants::kDefaultAlignment>
+      final {
+    static void* Invoke(AllocationHandle& handle, size_t size) {
+      return MakeGarbageCollectedTraitInternal::Allocate(
+          handle, size, internal::GCInfoTrait<GCInfoType>::Index());
     }
   };
 
-  template <typename U>
-  struct SpacePolicy<U, void> {
-    static void* Allocate(AllocationHandle& handle, size_t size) {
-      // Default space.
+  // Default space with >`kDefaultAlignment` byte alignment.
+  template <typename GCInfoType, size_t alignment>
+  struct AllocationDispatcher<GCInfoType, void, alignment> final {
+    static void* Invoke(AllocationHandle& handle, size_t size) {
       return MakeGarbageCollectedTraitInternal::Allocate(
-          handle, size, internal::GCInfoTrait<U>::Index());
+          handle, size, static_cast<AlignVal>(alignment),
+          internal::GCInfoTrait<GCInfoType>::Index());
+    }
+  };
+
+  // Custom space with `kDefaultAlignment` byte alignment.
+  template <typename GCInfoType, typename CustomSpace>
+  struct AllocationDispatcher<GCInfoType, CustomSpace,
+                              api_constants::kDefaultAlignment>
+      final {
+    static void* Invoke(AllocationHandle& handle, size_t size) {
+      static_assert(std::is_base_of<CustomSpaceBase, CustomSpace>::value,
+                    "Custom space must inherit from CustomSpaceBase.");
+      return MakeGarbageCollectedTraitInternal::Allocate(
+          handle, size, internal::GCInfoTrait<GCInfoType>::Index(),
+          CustomSpace::kSpaceIndex);
     }
   };
 
  private:
-  static void* Allocate(cppgc::AllocationHandle& handle, size_t size,
-                        GCInfoIndex index);
-  static void* Allocate(cppgc::AllocationHandle& handle, size_t size,
-                        GCInfoIndex index, CustomSpaceIndex space_index);
+  static void* CPPGC_DEFAULT_ALIGNED Allocate(cppgc::AllocationHandle&, size_t,
+                                              GCInfoIndex);
+  static void* CPPGC_DOUBLE_WORD_ALIGNED Allocate(cppgc::AllocationHandle&,
+                                                  size_t, AlignVal,
+                                                  GCInfoIndex);
+  static void* CPPGC_DEFAULT_ALIGNED Allocate(cppgc::AllocationHandle&, size_t,
+                                              GCInfoIndex, CustomSpaceIndex);
+  static void* CPPGC_DOUBLE_WORD_ALIGNED Allocate(cppgc::AllocationHandle&,
+                                                  size_t, AlignVal, GCInfoIndex,
+                                                  CustomSpaceIndex);
 
   friend class HeapObjectHeader;
 };
@@ -109,10 +169,18 @@ class MakeGarbageCollectedTraitBase
         std::is_base_of<typename T::ParentMostGarbageCollectedType, T>::value,
         "U of GarbageCollected<U> must be a base of T. Check "
         "GarbageCollected<T> base class inheritance.");
-    return SpacePolicy<
+    static constexpr size_t kWantedAlignment =
+        alignof(T) < internal::api_constants::kDefaultAlignment
+            ? internal::api_constants::kDefaultAlignment
+            : alignof(T);
+    static_assert(
+        kWantedAlignment <= internal::api_constants::kMaxSupportedAlignment,
+        "Requested alignment larger than alignof(std::max_align_t) bytes. "
+        "Please file a bug to possibly get this restriction lifted.");
+    return AllocationDispatcher<
         typename internal::GCInfoFolding<
             T, typename T::ParentMostGarbageCollectedType>::ResultType,
-        typename SpaceTrait<T>::Space>::Allocate(handle, size);
+        typename SpaceTrait<T>::Space, kWantedAlignment>::Invoke(handle, size);
   }
 
   /**
@@ -236,4 +304,7 @@ V8_INLINE T* MakeGarbageCollected(AllocationHandle& handle,
 
 }  // namespace cppgc
 
+#undef CPPGC_DEFAULT_ALIGNED
+#undef CPPGC_DOUBLE_WORD_ALIGNED
+
 #endif  // INCLUDE_CPPGC_ALLOCATION_H_

deps/include/cppgc/internal/api-constants.h

@@ -39,6 +39,11 @@ constexpr size_t kCagedHeapReservationSize = static_cast<size_t>(4) * kGB;
 constexpr size_t kCagedHeapReservationAlignment = kCagedHeapReservationSize;
 #endif
 
+static constexpr size_t kDefaultAlignment = sizeof(void*);
+
+// Maximum support alignment for a type as in `alignof(T)`.
+static constexpr size_t kMaxSupportedAlignment = 2 * kDefaultAlignment;
+
 }  // namespace api_constants
 
 }  // namespace internal

deps/include/cppgc/internal/persistent-node.h

@@ -20,6 +20,7 @@ class Visitor;
 namespace internal {
 
 class CrossThreadPersistentRegion;
+class FatalOutOfMemoryHandler;
 
 // PersistentNode represents a variant of two states:
 // 1) traceable node with a back pointer to the Persistent object;
@@ -79,7 +80,7 @@ class V8_EXPORT PersistentRegionBase {
   using PersistentNodeSlots = std::array<PersistentNode, 256u>;
 
  public:
-  PersistentRegionBase() = default;
+  explicit PersistentRegionBase(const FatalOutOfMemoryHandler& oom_handler);
   // Clears Persistent fields to avoid stale pointers after heap teardown.
   ~PersistentRegionBase();
 
@@ -89,6 +90,7 @@ class V8_EXPORT PersistentRegionBase {
   PersistentNode* AllocateNode(void* owner, TraceCallback trace) {
     if (!free_list_head_) {
       EnsureNodeSlots();
+      CPPGC_DCHECK(free_list_head_);
     }
     PersistentNode* node = free_list_head_;
     free_list_head_ = free_list_head_->FreeListNext();
@@ -122,6 +124,7 @@ class V8_EXPORT PersistentRegionBase {
   std::vector<std::unique_ptr<PersistentNodeSlots>> nodes_;
   PersistentNode* free_list_head_ = nullptr;
   size_t nodes_in_use_ = 0;
+  const FatalOutOfMemoryHandler& oom_handler_;
 
   friend class CrossThreadPersistentRegion;
 };
@@ -130,29 +133,25 @@ class V8_EXPORT PersistentRegionBase {
 // freeing happens only on the thread that created the region.
 class V8_EXPORT PersistentRegion final : public PersistentRegionBase {
  public:
-  PersistentRegion();
+  explicit PersistentRegion(const FatalOutOfMemoryHandler&);
   // Clears Persistent fields to avoid stale pointers after heap teardown.
   ~PersistentRegion() = default;
 
   PersistentRegion(const PersistentRegion&) = delete;
   PersistentRegion& operator=(const PersistentRegion&) = delete;
 
   V8_INLINE PersistentNode* AllocateNode(void* owner, TraceCallback trace) {
-#if V8_ENABLE_CHECKS
-    CheckIsCreationThread();
-#endif  // V8_ENABLE_CHECKS
+    CPPGC_DCHECK(IsCreationThread());
     return PersistentRegionBase::AllocateNode(owner, trace);
   }
 
   V8_INLINE void FreeNode(PersistentNode* node) {
-#if V8_ENABLE_CHECKS
-    CheckIsCreationThread();
-#endif  // V8_ENABLE_CHECKS
+    CPPGC_DCHECK(IsCreationThread());
     PersistentRegionBase::FreeNode(node);
   }
 
  private:
-  void CheckIsCreationThread();
+  bool IsCreationThread();
 
   int creation_thread_id_;
 };
@@ -172,7 +171,7 @@ class V8_EXPORT PersistentRegionLock final {
 class V8_EXPORT CrossThreadPersistentRegion final
     : protected PersistentRegionBase {
  public:
-  CrossThreadPersistentRegion() = default;
+  explicit CrossThreadPersistentRegion(const FatalOutOfMemoryHandler&);
   // Clears Persistent fields to avoid stale pointers after heap teardown.
   ~CrossThreadPersistentRegion();
 

deps/include/cppgc/internal/pointer-policies.h

@@ -92,19 +92,19 @@ class DisabledCheckingPolicy {
   void CheckPointer(const void*) {}
 };
 
-#if V8_ENABLE_CHECKS
+#ifdef DEBUG
 // Off heap members are not connected to object graph and thus cannot ressurect
 // dead objects.
 using DefaultMemberCheckingPolicy =
     SameThreadEnabledCheckingPolicy<false /* kCheckOffHeapAssignments*/>;
 using DefaultPersistentCheckingPolicy =
     SameThreadEnabledCheckingPolicy<true /* kCheckOffHeapAssignments*/>;
-#else
+#else   // !DEBUG
 using DefaultMemberCheckingPolicy = DisabledCheckingPolicy;
 using DefaultPersistentCheckingPolicy = DisabledCheckingPolicy;
-#endif
+#endif  // !DEBUG
 // For CT(W)P neither marking information (for value), nor objectstart bitmap
-// (for slot) are guaranteed to be present because there's no synchonization
+// (for slot) are guaranteed to be present because there's no synchronization
 // between heaps after marking.
 using DefaultCrossThreadPersistentCheckingPolicy = DisabledCheckingPolicy;
 

deps/include/libplatform/libplatform.h

@@ -95,7 +95,7 @@ V8_PLATFORM_EXPORT void RunIdleTasks(v8::Platform* platform,
  * The |platform| has to be created using |NewDefaultPlatform|.
  *
  */
-V8_DEPRECATE_SOON("Access the DefaultPlatform directly")
+V8_DEPRECATED("Access the DefaultPlatform directly")
 V8_PLATFORM_EXPORT void SetTracingController(
     v8::Platform* platform,
     v8::platform::tracing::TracingController* tracing_controller);

deps/include/v8-context.h

@@ -318,7 +318,7 @@ class V8_EXPORT Context : public Data {
      * stack may be allocated separately from the native stack.  See also
      * |TryCatch::JSStackComparableAddressPrivate| for details.
      */
-    V8_DEPRECATE_SOON(
+    V8_DEPRECATED(
         "This is private V8 information that should not be exposed in the API.")
     uintptr_t JSStackComparableAddress() const {
       return JSStackComparableAddressPrivate();

deps/include/v8-cppgc.h

@@ -195,9 +195,11 @@ class V8_EXPORT JSHeapConsistency final {
    * \returns whether a write barrier is needed and which barrier to invoke.
    */
   template <typename HeapHandleCallback>
+  V8_DEPRECATE_SOON("Write barriers automatically emitted by TracedReference.")
   static V8_INLINE WriteBarrierType
-  GetWriteBarrierType(const TracedReferenceBase& ref,
-                      WriteBarrierParams& params, HeapHandleCallback callback) {
+      GetWriteBarrierType(const TracedReferenceBase& ref,
+                          WriteBarrierParams& params,
+                          HeapHandleCallback callback) {
     if (ref.IsEmpty()) return WriteBarrierType::kNone;
 
     if (V8_LIKELY(!cppgc::internal::WriteBarrier::
@@ -251,6 +253,7 @@ class V8_EXPORT JSHeapConsistency final {
    * \param params The parameters retrieved from `GetWriteBarrierType()`.
    * \param ref The reference being written to.
    */
+  V8_DEPRECATE_SOON("Write barriers automatically emitted by TracedReference.")
   static V8_INLINE void DijkstraMarkingBarrier(const WriteBarrierParams& params,
                                                cppgc::HeapHandle& heap_handle,
                                                const TracedReferenceBase& ref) {
@@ -280,6 +283,7 @@ class V8_EXPORT JSHeapConsistency final {
    * \param params The parameters retrieved from `GetWriteBarrierType()`.
    * \param ref The reference being written to.
    */
+  V8_DEPRECATE_SOON("Write barriers automatically emitted by TracedReference.")
   static V8_INLINE void GenerationalBarrier(const WriteBarrierParams& params,
                                             const TracedReferenceBase& ref) {}
 
@@ -318,8 +322,13 @@ namespace cppgc {
 
 template <typename T>
 struct TraceTrait<v8::TracedReference<T>> {
-  static void Trace(Visitor* visitor, const v8::TracedReference<T>* self) {
-    static_cast<v8::JSVisitor*>(visitor)->Trace(*self);
+  static cppgc::TraceDescriptor GetTraceDescriptor(const void* self) {
+    return {nullptr, Trace};
+  }
+
+  static void Trace(Visitor* visitor, const void* self) {
+    static_cast<v8::JSVisitor*>(visitor)->Trace(
+        *static_cast<const v8::TracedReference<T>*>(self));
   }
 };
 

deps/include/v8-embedder-heap.h

@@ -127,7 +127,7 @@ class V8_EXPORT EmbedderHeapTracer {
   /**
    * Called by the embedder to notify V8 of an empty execution stack.
    */
-  V8_DEPRECATE_SOON(
+  V8_DEPRECATED(
       "This call only optimized internal caches which V8 is able to figure out "
       "on its own now.")
   void NotifyEmptyEmbedderStack();

deps/include/v8-exception.h

@@ -169,7 +169,7 @@ class V8_EXPORT TryCatch {
    */
   void SetCaptureMessage(bool value);
 
-  V8_DEPRECATE_SOON(
+  V8_DEPRECATED(
       "This is private information that should not be exposed by the API")
   static void* JSStackComparableAddress(TryCatch* handler) {
     if (handler == nullptr) return nullptr;