A64: Synchronize with r15545.

test/cctest/test-mark-compact.cc

Index: test/cctest/test-mark-compact.cc
diff --git a/test/cctest/test-mark-compact.cc b/test/cctest/test-mark-compact.cc
index a01c5dfae3aa40bce96ac62b0eb02b620479a0fc..626df16617128ca371283b4657d97e2fe4a407d3 100644
--- a/test/cctest/test-mark-compact.cc
+++ b/test/cctest/test-mark-compact.cc
@@ -310,6 +310,7 @@ static void WeakPointerCallback(v8::Isolate* isolate,
   handle->Dispose(isolate);
 }
 
+
 TEST(ObjectGroups) {
   FLAG_incremental_marking = false;
   CcTest::InitializeVM();
@@ -560,10 +561,31 @@ TEST(BootUpMemoryUse) {
       if (v8::internal::Snapshot::IsEnabled()) {
         CHECK_LE(delta, 3100 * 1024);
       } else {
-        CHECK_LE(delta, 3400 * 1024);
+        CHECK_LE(delta, 3450 * 1024);
       }
     }
   }
 }
 
+
+intptr_t ShortLivingIsolate() {
+  v8::Isolate* isolate = v8::Isolate::New();
+  { v8::Isolate::Scope isolate_scope(isolate);
+    v8::Locker lock(isolate);
+    v8::HandleScope handle_scope;
+    v8::Local<v8::Context> context = v8::Context::New(isolate);
+    CHECK(!context.IsEmpty());
+  }
+  isolate->Dispose();
+  return MemoryInUse();
+}
+
+
+TEST(RegressJoinThreadsOnIsolateDeinit) {
+  intptr_t size_limit = ShortLivingIsolate() * 2;
+  for (int i = 0; i < 10; i++) {
+    CHECK_GT(size_limit, ShortLivingIsolate());
+  }
+}
+
 #endif  // __linux__ and !USE_SIMULATOR