hotspot/test/gc/stress/gcbasher/TestGCBasher.java
changeset 42016 4ef693df9ff9
child 42307 cefc81dc1d52
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/gc/stress/gcbasher/TestGCBasher.java	Thu Oct 06 16:32:46 2016 +0200
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+import java.io.IOException;
+import java.net.URI;
+import java.nio.file.FileSystems;
+import java.nio.file.FileSystem;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.HashMap;
+import java.util.stream.Stream;
+
+public class TestGCBasher {
+    private static void parseClassFiles() throws IOException {
+        HashMap<String, ClassInfo> deps = new HashMap<>();
+
+        FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/"));
+        Stream<Path> s = Files.walk(fs.getPath("/"));
+        for (Path p : (Iterable<Path>)s::iterator) {
+            if (p.toString().endsWith(".class")) {
+                byte[] data = Files.readAllBytes(p);
+                Decompiler d = new Decompiler(data);
+                ClassInfo ci = d.getClassInfo();
+                deps.put(ci.getName(), ci);
+            }
+        }
+    }
+
+    public static void run(String[] args) throws IOException {
+        if (args.length != 1) {
+            System.err.println("Usage: TestGCBasher <duration-ms>");
+            return;
+        }
+
+        long durationMillis = Long.valueOf(args[0]);
+        long start = System.currentTimeMillis();
+        while (System.currentTimeMillis() - start < durationMillis) {
+            parseClassFiles();
+        }
+    }
+}