Merge changes Ic39b6d55,Id9a392ac,I1a6b05ea

* changes:
  Show unreachable objects in ahat.
  ahat: add support for diffing two heap dumps.
  Refactor ahat's perflib api.

1 files changed, 37 insertions, 0 deletions

diff --git a/tools/ahat/src/heapdump/PathElement.java b/tools/ahat/src/heapdump/PathElement.java
new file mode 100644
index 0000000000..196a24628c
--- /dev/null
+++ b/tools/ahat/src/heapdump/PathElement.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.ahat.heapdump;
+
+public class PathElement implements Diffable<PathElement> {
+  public final AhatInstance instance;
+  public final String field;
+  public boolean isDominator;
+
+  public PathElement(AhatInstance instance, String field) {
+    this.instance = instance;
+    this.field = field;
+    this.isDominator = false;
+  }
+
+  @Override public PathElement getBaseline() {
+    return this;
+  }
+
+  @Override public boolean isPlaceHolder() {
+    return false;
+  }
+}