[gjs/mozjs91: 7/18] Update GC API

[Evan Welsh <ewlsh src gnome org>]

commit 63f7cddbd1fe787a9f7c60b2ce02fddacaeb70f0
Author: Evan Welsh <contact evanwelsh com>
Date:   Sat Aug 7 14:35:06 2021 -0700

    Update GC API
    
    GC_* options are now JS::GCOptions, JSGC_MODE has been removed
    in favor of individual flags. JSGC_MODE_INCREMENTAL is now
    JSGC_INCREMENTAL_GC_ENABLED
    
    See https://bugzilla.mozilla.org/show_bug.cgi?id=1686249

 gjs/engine.cpp     | 14 ++++----------
 gjs/jsapi-util.cpp |  3 ++-
 2 files changed, 6 insertions(+), 11 deletions(-)
---
diff --git a/gjs/engine.cpp b/gjs/engine.cpp
index 0977bca8..15e3a036 100644
--- a/gjs/engine.cpp
+++ b/gjs/engine.cpp
@@ -133,19 +133,13 @@ JSContext* gjs_create_js_context(GjsContextPrivate* uninitialized_gjs) {
         return nullptr;
     }
 
-    // commented are defaults in moz-24
+    // See
+    // https://searchfox.org/mozilla-esr91/rev/c49725508e97c1e2e2bb3bf9ed0ba14b2016abac/js/public/GCAPI.h#53
+    // for additional context on these options.
     JS_SetNativeStackQuota(cx, 1024 * 1024);
     JS_SetGCParameter(cx, JSGC_MAX_BYTES, -1);
-    JS_SetGCParameter(cx, JSGC_MODE, JSGC_MODE_INCREMENTAL);
+    JS_SetGCParameter(cx, JSGC_INCREMENTAL_GC_ENABLED, 1);
     JS_SetGCParameter(cx, JSGC_SLICE_TIME_BUDGET_MS, 10); /* ms */
-    // JS_SetGCParameter(cx, JSGC_HIGH_FREQUENCY_TIME_LIMIT, 1000); /* ms */
-    // JS_SetGCParameter(cx, JSGC_LOW_FREQUENCY_HEAP_GROWTH, 150);
-    // JS_SetGCParameter(cx, JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN, 150);
-    // JS_SetGCParameter(cx, JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX, 300);
-    // JS_SetGCParameter(cx, JSGC_HIGH_FREQUENCY_LOW_LIMIT, 100);
-    // JS_SetGCParameter(cx, JSGC_HIGH_FREQUENCY_HIGH_LIMIT, 500);
-    // JS_SetGCParameter(cx, JSGC_ALLOCATION_THRESHOLD, 30);
-    // JS_SetGCParameter(cx, JSGC_DECOMMIT_THRESHOLD, 32);
 
     /* set ourselves as the private data */
     JS_SetContextPrivate(cx, uninitialized_gjs);
diff --git a/gjs/jsapi-util.cpp b/gjs/jsapi-util.cpp
index 7db6e770..ce49bc1f 100644
--- a/gjs/jsapi-util.cpp
+++ b/gjs/jsapi-util.cpp
@@ -574,7 +574,8 @@ gjs_gc_if_needed (JSContext *context)
         uint64_t rss_usize = rss_size;
         if (rss_usize > linux_rss_trigger) {
             linux_rss_trigger = MIN(G_MAXUINT32, rss_usize * 1.25);
-            JS::NonIncrementalGC(context, GC_SHRINK,
+
+            JS::NonIncrementalGC(context, JS::GCOptions::Shrink,
                                  Gjs::GCReason::LINUX_RSS_TRIGGER);
         } else if (rss_size < (0.75 * linux_rss_trigger)) {
             /* If we've shrunk by 75%, lower the trigger */