deps: V8: backport 4bf051d536a1

Original commit message:

    [api] Add Context::GetMicrotaskQueue method

    Add a method that returns the microtask queue that is being used
    by the `v8::Context`.

    This is helpful in non-monolithic embedders like Node.js, which
    accept Contexts created by its own embedders like Electron, or
    for native Node.js addons. In particular, it enables:

    1. Making sure that “nested” `Context`s use the correct microtask
       queue, i.e. the one from the outer Context.
    2. Enqueueing microtasks into the correct microtask queue.

    Previously, these things only worked when the microtask queue for
    a given Context was the Isolate’s default queue.

    As an alternative, I considered adding a way to make new `Context`s
    inherit the queue from the `Context` that was entered at the time
    of their creation, but that seemed a bit more “magic”, less flexible,
    and didn’t take care of concern 2 listed above.

    Change-Id: I15ed796df90f23c97a545a8e1b30a3bf4a5c4320
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2579914
    Reviewed-by: Toon Verwaest <verwaest@chromium.org>
    Commit-Queue: Toon Verwaest <verwaest@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#71710}

Refs: https://github.com/v8/v8/commit/4bf051d536a172e7932845d82f918ad7280c7873

PR-URL: https://github.com/nodejs/node/pull/36482
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/deps/v8/src/api/api.cc b/deps/v8/src/api/api.cc
index a29747da62..66afdb1968 100644
--- a/deps/v8/src/api/api.cc
+++ b/deps/v8/src/api/api.cc
@@ -6137,6 +6137,12 @@ v8::Isolate* Context::GetIsolate() {
   return reinterpret_cast<Isolate*>(env->GetIsolate());
 }
 
+v8::MicrotaskQueue* Context::GetMicrotaskQueue() {
+  i::Handle<i::Context> env = Utils::OpenHandle(this);
+  CHECK(env->IsNativeContext());
+  return i::Handle<i::NativeContext>::cast(env)->microtask_queue();
+}
+
 v8::Local<v8::Object> Context::Global() {
   i::Handle<i::Context> context = Utils::OpenHandle(this);
   i::Isolate* isolate = context->GetIsolate();