Merged r18000, r18013, r18298, r18319 into 3.22 branch.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 64fb17979da8ce576163164a840d51952273f50c..cf51024c867c9d74f8a00b3c4c3e130d04139afb 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -10332,6 +10332,18 @@ void Code::InvalidateRelocation() {
 }
 
 
+void Code::InvalidateEmbeddedObjects() {
+  Object* undefined = GetHeap()->undefined_value();
+  int mode_mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT);
+  for (RelocIterator it(this, mode_mask); !it.done(); it.next()) {
+    RelocInfo::Mode mode = it.rinfo()->rmode();
+    if (mode == RelocInfo::EMBEDDED_OBJECT) {
+      it.rinfo()->set_target_object(undefined, SKIP_WRITE_BARRIER);
+    }
+  }
+}
+
+
 void Code::Relocate(intptr_t delta) {
   for (RelocIterator it(this, RelocInfo::kApplyMask); !it.done(); it.next()) {
     it.rinfo()->apply(delta);