Generate an hprof file to test ahat.
This change sets up the infrastructure to write test cases for ahat
that make use of an hprof file automatically generated from a sample
program.
Change-Id: Id11f656afb69c96a26655cc4caeb745ad844f431
diff --git a/tools/ahat/test-dump/Main.java b/tools/ahat/test-dump/Main.java
new file mode 100644
index 0000000..cea1dc1
--- /dev/null
+++ b/tools/ahat/test-dump/Main.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+import dalvik.system.VMDebug;
+import java.io.IOException;
+
+/**
+ * Program used to create a heap dump for test purposes.
+ */
+public class Main {
+ // Keep a reference to the DumpedStuff instance so that it is not garbage
+ // collected before we take the heap dump.
+ public static DumpedStuff stuff;
+
+ // We will take a heap dump that includes a single instance of this
+ // DumpedStuff class. Objects stored as fields in this class can be easily
+ // found in the hprof dump by searching for the instance of the DumpedStuff
+ // class and reading the desired field.
+ public static class DumpedStuff {
+ public String basicString = "hello, world";
+ public String nullString = null;
+ public Object anObject = new Object();
+ }
+
+ public static void main(String[] args) throws IOException {
+ if (args.length < 1) {
+ System.err.println("no output file specified");
+ return;
+ }
+ String file = args[0];
+
+ // Allocate the instance of DumpedStuff.
+ stuff = new DumpedStuff();
+
+ // Take a heap dump that will include that instance of DumpedStuff.
+ System.err.println("Dumping hprof data to " + file);
+ VMDebug.dumpHprofData(file);
+ }
+}