LibWeb: Add an Internals method to dump the GC graph

tcl3 · awesomekling · commit 74940726d0b5 · 2025-11-04T10:34:43.000+01:00
diff --git a/Libraries/LibWeb/Internals/Internals.cpp b/Libraries/LibWeb/Internals/Internals.cpp
@@ -13,6 +13,7 @@
 #include <LibWeb/ARIA/StateAndProperties.h>
 #include <LibWeb/Bindings/InternalsPrototype.h>
 #include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/Bindings/MainThreadVM.h>
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/DOM/Event.h>
 #include <LibWeb/DOM/EventTarget.h>
@@ -342,6 +343,11 @@ String Internals::dump_display_list()
     return window().associated_document().dump_display_list();
 }
 
+String Internals::dump_gc_graph()
+{
+    return Bindings::main_thread_vm().heap().dump_graph().serialized();
+}
+
 GC::Ptr<DOM::ShadowRoot> Internals::get_shadow_root(GC::Ref<DOM::Element> element)
 {
     return element->shadow_root();
diff --git a/Libraries/LibWeb/Internals/Internals.h b/Libraries/LibWeb/Internals/Internals.h
@@ -68,6 +68,7 @@ class WEB_API Internals final : public InternalsBase {
     bool headless();
 
     String dump_display_list();
+    String dump_gc_graph();
 
     GC::Ptr<DOM::ShadowRoot> get_shadow_root(GC::Ref<DOM::Element>);
 
diff --git a/Libraries/LibWeb/Internals/Internals.idl b/Libraries/LibWeb/Internals/Internals.idl
@@ -57,6 +57,7 @@ interface Internals {
     readonly attribute boolean headless;
 
     DOMString dumpDisplayList();
+    DOMString dumpGCGraph();
 
     // Returns the shadow root of the element, if it has one, even if it's not normally accessible to JS.
     ShadowRoot? getShadowRoot(Element element);
diff --git a/Tests/LibWeb/Crash/Internals/dump-gc-graph.html b/Tests/LibWeb/Crash/Internals/dump-gc-graph.html
@@ -0,0 +1,4 @@
+<!DOCTYPE html>
+<script>
+    internals.dumpGCGraph();
+</script>
