hotspot/test/gc/arguments/TestSelectDefaultGC.java
changeset 30271 97a537c6526e
child 30604 b8d532cb6420
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/gc/arguments/TestSelectDefaultGC.java	Mon Apr 20 08:53:08 2015 +0200
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+/*
+ * @test TestSelectDefaultGC
+ * @summary Test selection of GC when no GC option is specified
+ * @bug 8068582
+ * @key gc
+ * @library /testlibrary
+ * @modules java.base/sun.misc
+ *          java.management
+ * @run driver TestSelectDefaultGC
+ */
+
+import com.oracle.java.testlibrary.*;
+import java.util.regex.*;
+
+public class TestSelectDefaultGC {
+    public static boolean versionStringContains(OutputAnalyzer output, String pattern) {
+        Matcher matcher = Pattern.compile(pattern, Pattern.MULTILINE).matcher(output.getStderr());
+        return matcher.find();
+    }
+
+    public static void assertVMOption(OutputAnalyzer output, String option, boolean value) {
+        output.shouldMatch(" " + option + " .*=.* " + value + " ");
+    }
+
+    public static void main(String[] args) throws Exception {
+        // Start VM without specifying GC
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+PrintFlagsFinal", "-version");
+        OutputAnalyzer output = new OutputAnalyzer(pb.start());
+        output.shouldHaveExitValue(0);
+
+        boolean isServerVM = versionStringContains(output, "Server VM");
+
+        // Verify GC selection
+        assertVMOption(output, "UseParallelGC",      isServerVM);
+        assertVMOption(output, "UseParallelOldGC",   isServerVM);
+        assertVMOption(output, "UseSerialGC",        !isServerVM);
+        assertVMOption(output, "UseConcMarkSweepGC", false);
+        assertVMOption(output, "UseG1GC",            false);
+        assertVMOption(output, "UseParNewGC",        false);
+    }
+}