deps: patch V8 to 6.6.346.32

PR-URL: #20748
Refs: v8/v8@6.6.346.31...6.6.346.32
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>

deps/v8/include/v8-version.h

@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 6
 #define V8_MINOR_VERSION 6
 #define V8_BUILD_NUMBER 346
-#define V8_PATCH_LEVEL 31
+#define V8_PATCH_LEVEL 32
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)

deps/v8/src/managed.h

@@ -59,22 +59,30 @@ class Managed : public Foreign {
         isolate->factory()->NewForeign(reinterpret_cast<Address>(finalizer)));
     Handle<Object> global_handle = isolate->global_handles()->Create(*handle);
     finalizer->global_handle_location = global_handle.location();
-    GlobalHandles::MakeWeak(finalizer->global_handle_location,
-                            handle->GetFinalizer(), &Managed<CppType>::GCDelete,
-                            v8::WeakCallbackType::kParameter);
+    GlobalHandles::MakeWeak(
+        finalizer->global_handle_location, handle->GetFinalizer(),
+        &ResetWeakAndScheduleGCDelete, v8::WeakCallbackType::kParameter);
 
     return handle;
   }
 
  private:
-  static void GCDelete(const v8::WeakCallbackInfo<void>& data) {
+  static void ResetWeakAndScheduleGCDelete(
+      const v8::WeakCallbackInfo<void>& data) {
     FinalizerWithHandle* finalizer =
         reinterpret_cast<FinalizerWithHandle*>(data.GetParameter());
-
+    GlobalHandles::Destroy(finalizer->global_handle_location);
     Isolate* isolate = reinterpret_cast<Isolate*>(data.GetIsolate());
     isolate->UnregisterFromReleaseAtTeardown(finalizer);
+    // We need to call GCDelete as a second pass callback because
+    // it can trigger garbage collection. The first pass callbacks
+    // are not allowed to invoke V8 API.
+    data.SetSecondPassCallback(&GCDelete);
+  }
 
-    GlobalHandles::Destroy(finalizer->global_handle_location);
+  static void GCDelete(const v8::WeakCallbackInfo<void>& data) {
+    FinalizerWithHandle* finalizer =
+        reinterpret_cast<FinalizerWithHandle*>(data.GetParameter());
     NativeDelete(finalizer);
   }