From 2cb4d2ee571b91ec2480d2fba17e600a3843ddba Mon Sep 17 00:00:00 2001
From: win7-7 <win7-7@users.noreply.github.com>
Date: Mon, 29 Apr 2019 12:02:24 +0300
Subject: Improve dead compartment collection js/src/gc

---
 js/src/gc/GCRuntime.h     |  6 ++++--
 js/src/gc/RootMarking.cpp |  4 ++--
 js/src/gc/Zone.cpp        | 17 ++++++++++++++++-
 js/src/gc/Zone.h          | 13 ++++++++++---
 4 files changed, 32 insertions(+), 8 deletions(-)

(limited to 'js/src/gc')

diff --git a/js/src/gc/GCRuntime.h b/js/src/gc/GCRuntime.h
index 5c2576efd..16260a4e3 100644
--- a/js/src/gc/GCRuntime.h
+++ b/js/src/gc/GCRuntime.h
@@ -900,7 +900,8 @@ class GCRuntime
 
     void requestMajorGC(JS::gcreason::Reason reason);
     SliceBudget defaultBudget(JS::gcreason::Reason reason, int64_t millis);
-    void budgetIncrementalGC(SliceBudget& budget, AutoLockForExclusiveAccess& lock);
+    void budgetIncrementalGC(JS::gcreason::Reason reason, SliceBudget& budget,
+							 AutoLockForExclusiveAccess& lock);
     void resetIncrementalGC(AbortReason reason, AutoLockForExclusiveAccess& lock);
 
     // Assert if the system state is such that we should never
@@ -915,6 +916,7 @@ class GCRuntime
     void collect(bool nonincrementalByAPI, SliceBudget budget, JS::gcreason::Reason reason) JS_HAZ_GC_CALL;
     MOZ_MUST_USE bool gcCycle(bool nonincrementalByAPI, SliceBudget& budget,
                               JS::gcreason::Reason reason);
+	bool shouldRepeatForDeadZone(JS::gcreason::Reason reason);
     void incrementalCollectSlice(SliceBudget& budget, JS::gcreason::Reason reason,
                                  AutoLockForExclusiveAccess& lock);
 
@@ -1348,4 +1350,4 @@ class MOZ_RAII AutoMaybeStartBackgroundAllocation
 
 } /* namespace js */
 
-#endif
+#endif
\ No newline at end of file
diff --git a/js/src/gc/RootMarking.cpp b/js/src/gc/RootMarking.cpp
index 93264084b..ed7b8fb6f 100644
--- a/js/src/gc/RootMarking.cpp
+++ b/js/src/gc/RootMarking.cpp
@@ -478,6 +478,7 @@ js::gc::GCRuntime::bufferGrayRoots()
     for (GCZonesIter zone(rt); !zone.done(); zone.next())
         MOZ_ASSERT(zone->gcGrayRoots.empty());
 
+	gcstats::AutoPhase ap(stats, gcstats::PHASE_BUFFER_GRAY_ROOTS);
 
     BufferGrayRootsTracer grayBufferer(rt);
     if (JSTraceDataOp op = grayRootTracer.op)
@@ -539,5 +540,4 @@ GCRuntime::resetBufferedGrayRoots() const
                "Do not clear the gray buffers unless we are Failed or becoming Unused");
     for (GCZonesIter zone(rt); !zone.done(); zone.next())
         zone->gcGrayRoots.clearAndFree();
-}
-
+}
\ No newline at end of file
diff --git a/js/src/gc/Zone.cpp b/js/src/gc/Zone.cpp
index ed099341c..ecfb9a38c 100644
--- a/js/src/gc/Zone.cpp
+++ b/js/src/gc/Zone.cpp
@@ -370,6 +370,21 @@ Zone::fixupAfterMovingGC()
     fixupInitialShapeTable();
 }
 
+bool
+Zone::addTypeDescrObject(JSContext* cx, HandleObject obj)
+{
+	// Type descriptor objects are always tenured so we don't need post barriers
+	// on the set.
+	MOZ_ASSERT(!IsInsideNursery(obj));
+	
+	if (!typeDescrObjects.put(obj)) {
+		ReportOutOfMemory(cx);
+		return false;
+	}
+	
+	return true;
+}
+	
 ZoneList::ZoneList()
   : head(nullptr), tail(nullptr)
 {}
@@ -468,4 +483,4 @@ JS_PUBLIC_API(void)
 JS::shadow::RegisterWeakCache(JS::Zone* zone, WeakCache<void*>* cachep)
 {
     zone->registerWeakCache(cachep);
-}
+}
\ No newline at end of file
diff --git a/js/src/gc/Zone.h b/js/src/gc/Zone.h
index 50d06319d..24f4648f7 100644
--- a/js/src/gc/Zone.h
+++ b/js/src/gc/Zone.h
@@ -349,10 +349,17 @@ struct Zone : public JS::shadow::Zone,
     // Keep track of all TypeDescr and related objects in this compartment.
     // This is used by the GC to trace them all first when compacting, since the
     // TypedObject trace hook may access these objects.
-    using TypeDescrObjectSet = js::GCHashSet<js::HeapPtr<JSObject*>,
-                                             js::MovableCellHasher<js::HeapPtr<JSObject*>>,
+	
+	 //
+	 // There are no barriers here - the set contains only tenured objects so no
+	 // post-barrier is required, and these are weak references so no pre-barrier
+	 // is required.
+    using TypeDescrObjectSet = js::GCHashSet<JSObject*,
+                                             js::MovableCellHasher<JSObject*>,
                                              js::SystemAllocPolicy>;
     JS::WeakCache<TypeDescrObjectSet> typeDescrObjects;
+	
+	bool addTypeDescrObject(JSContext* cx, HandleObject obj);
 
 
     // Malloc counter to measure memory pressure for GC scheduling. It runs from
@@ -734,4 +741,4 @@ class ZoneAllocPolicy
 
 } // namespace js
 
-#endif // gc_Zone_h
+#endif // gc_Zone_h
\ No newline at end of file
-- 
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