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@beaufortfrancois
Created June 12, 2019 13:48
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diff --git a/third_party/blink/renderer/modules/webgpu/gpu_buffer.cc b/third_party/blink/renderer/modules/webgpu/gpu_buffer.cc
index 9658796f2508..37a106c741f6 100644
--- a/third_party/blink/renderer/modules/webgpu/gpu_buffer.cc
+++ b/third_party/blink/renderer/modules/webgpu/gpu_buffer.cc
@ -127,6 +131,25 @@ void GPUBuffer::OnMapAsyncCallback(ScriptPromiseResolver* resolver,
WTF::ArrayBufferContents::SharingType::kNotShared);
mapped_buffer_ = DOMArrayBuffer::Create(contents);
+
+ auto* script_state = resolver->GetScriptState();
+ if (script_state->ContextIsValid()) {
+ ScriptState::Scope scope(script_state);
+
+ v8::Isolate* isolate = script_state->GetIsolate();
+ v8::Local<v8::Object> global = script_state->GetContext()->Global();
+
+ v8::Local<v8::Value> gpu_buffer_value = ToV8(this, global, isolate);
+ v8::Local<v8::Object> gpu_buffer_wrapper =
+ gpu_buffer_value->ToObject(script_state->GetContext())
+ .ToLocalChecked();
+
+ v8::Local<v8::Value> mapped_buffer_wrapper =
+ ToV8(mapped_buffer_, global, isolate);
+ V8PrivateProperty::GetGPUBufferArrayBuffer(isolate).Set(
+ gpu_buffer_wrapper, mapped_buffer_wrapper);
+ }
+
resolver->Resolve(mapped_buffer_);
}
break;
diff --git a/third_party/blink/renderer/platform/bindings/v8_private_property.h b/third_party/blink/renderer/platform/bindings/v8_private_property.h
index 9eb1a25df1a9..0b1eb6122d44 100644
--- a/third_party/blink/renderer/platform/bindings/v8_private_property.h
+++ b/third_party/blink/renderer/platform/bindings/v8_private_property.h
@@ -34,6 +34,7 @@ class ScriptWrappable;
X(CustomElementLifecycle, DetachedCallback) \
X(DOMException, Error) \
X(Global, Event) \
+ X(GPUBuffer, ArrayBuffer) \
X(IDBCursor, Request) \
X(IntersectionObserver, Callback) \
X(MessageChannel, Port1) \
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