[gjs/gnome-3-28] gtype: delete heap wrappers on gtype removal

[Philip Chimento <pchimento src gnome org>]

commit 12172aa369b371e018932ee5e7a5f2270ee0d8d3
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Sat Oct 13 16:52:33 2018 +0200

    gtype: delete heap wrappers on gtype removal
    
    (cherry picked from commit 926be39c763a2adddf27a3cdd05dcebfed2e3db3)

 gi/gtype.cpp                    | 15 ++++++++++++---
 installed-tests/extra/gjs.supp  | 29 -----------------------------
 installed-tests/extra/lsan.supp |  3 ---
 3 files changed, 12 insertions(+), 35 deletions(-)
---
diff --git a/gi/gtype.cpp b/gi/gtype.cpp
index 314f4b28..03920ebf 100644
--- a/gi/gtype.cpp
+++ b/gi/gtype.cpp
@@ -63,13 +63,18 @@ update_gtype_weak_pointers(JSContext     *cx,
                            void          *data)
 {
     for (auto iter = weak_pointer_list.begin(); iter != weak_pointer_list.end(); ) {
-        auto heap_wrapper = static_cast<JS::Heap<JSObject *> *>(g_type_get_qdata(*iter, 
gjs_get_gtype_wrapper_quark()));
+        GType gtype = *iter;
+        auto heap_wrapper = static_cast<JS::Heap<JSObject *> *>(
+            g_type_get_qdata(gtype, gjs_get_gtype_wrapper_quark()));
         JS_UpdateWeakPointerAfterGC(heap_wrapper);
 
         /* No read barriers are needed if the only thing we are doing with the
          * pointer is comparing it to nullptr. */
-        if (heap_wrapper->unbarrieredGet() == nullptr)
+        if (heap_wrapper->unbarrieredGet() == nullptr) {
+            g_type_set_qdata(gtype, gjs_get_gtype_wrapper_quark(), nullptr);
             iter = weak_pointer_list.erase(iter);
+            delete heap_wrapper;
+        }
         else
             iter++;
     }
@@ -95,8 +100,12 @@ gjs_gtype_finalize(JSFreeOp *fop,
     if (G_UNLIKELY(gtype == 0))
         return;
 
-    weak_pointer_list.erase(gtype);
+    auto heap_wrapper = static_cast<JS::Heap<JSObject*>*>(
+        g_type_get_qdata(gtype, gjs_get_gtype_wrapper_quark()));
+
     g_type_set_qdata(gtype, gjs_get_gtype_wrapper_quark(), NULL);
+    weak_pointer_list.erase(gtype);
+    delete heap_wrapper;
 }
 
 static bool
diff --git a/installed-tests/extra/gjs.supp b/installed-tests/extra/gjs.supp
index c70baadc..b99eb250 100644
--- a/installed-tests/extra/gjs.supp
+++ b/installed-tests/extra/gjs.supp
@@ -1,35 +1,6 @@
 # Valgrind suppressions file for GJS
 # This is intended to be used in addition to GLib's glib.supp file.
 
-# We leak a small wrapper in GJS for each registered GType.
-
-{
-   gtype-wrapper-new
-   Memcheck:Leak
-   match-leak-kinds: definite
-   fun:_Znwm
-   fun:gjs_gtype_create_gtype_wrapper
-}
-
-{
-   gtype-wrapper-qdata
-   Memcheck:Leak
-   match-leak-kinds: possible
-   ...
-   fun:type_set_qdata_W
-   fun:g_type_set_qdata
-   fun:gjs_gtype_create_gtype_wrapper
-}
-
-{
-   g_type_register_fundamental never freed
-   Memcheck:Leak
-   fun:calloc
-   ...
-   fun:g_type_register_fundamental
-   ...
-}
-
 # SpiderMonkey leaks
 
 {
diff --git a/installed-tests/extra/lsan.supp b/installed-tests/extra/lsan.supp
index 179eb9c5..3c69851b 100644
--- a/installed-tests/extra/lsan.supp
+++ b/installed-tests/extra/lsan.supp
@@ -1,8 +1,5 @@
 # SpiderMonkey leaks a mutex for each GC helper thread.
 leak:js::HelperThread::threadLoop
 
-# We leak a small wrapper in GJS for each registered GType.
-leak:gjs_gtype_create_gtype_wrapper
-
 # https://bugs.freedesktop.org/show_bug.cgi?id=105466
 leak:libfontconfig.so.1