LibJS: Use a work queue instead of the C++ stack for the GC mark phase

This fixes an issue where we'd run out of C++ stack while traversing large GC heap graphs.
Author: https://github.com/awesomekling Commit: 7826cb2556 Pull-request: https://github.com/SerenityOS/serenity/pull/16950 Reviewed-by: https://github.com/trflynn89 ✅
2025-08-08 09:09:43 +00:00 · 2023-01-10 20:17:29 +01:00 · 2023-01-10 20:17:29 +01:00 · 7826cb2556 · 2024-07-17 03:14:39 +09:00
commit 7826cb2556
parent 5dcc58d54a
2 changed files with 30 additions and 5 deletions
--- a/Userland/Libraries/LibJS/Tests/gc-deeply-nested-object-graph.js
+++ b/Userland/Libraries/LibJS/Tests/gc-deeply-nested-object-graph.js
@ -0,0 +1,11 @@
+test("garbage collection of a deeply-nested object graph", () => {
+    let root = {};
+    let o = root;
+
+    for (let i = 0; i < 200_000; ++i) {
+        o.next = {};
+        o = o.next;
+    }
+
+    gc();
+});