8087291: InitialBootClassLoaderMetaspaceSize and CompressedClassSpaceSize...

8087291: InitialBootClassLoaderMetaspaceSize and CompressedClassSpaceSize should be checked consistent from MaxMetaspaceSize
Reviewed-by: dholmes, sspitsyn, poonam

src/share/vm/memory/metaspace.cpp

 /*
- * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2017, 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
@@ -3135,6 +3135,24 @@ void Metaspace::ergo_initialize() {
 
   CompressedClassSpaceSize = align_size_down_bounded(CompressedClassSpaceSize, _reserve_alignment);
   set_compressed_class_space_size(CompressedClassSpaceSize);
+
+  // Initial virtual space size will be calculated at global_initialize()
+  uintx min_metaspace_sz =
+      VIRTUALSPACEMULTIPLIER * InitialBootClassLoaderMetaspaceSize;
+  if (UseCompressedClassPointers) {
+    if ((min_metaspace_sz + CompressedClassSpaceSize) >  MaxMetaspaceSize) {
+      if (min_metaspace_sz >= MaxMetaspaceSize) {
+        vm_exit_during_initialization("MaxMetaspaceSize is too small.");
+      } else {
+        FLAG_SET_ERGO(uintx, CompressedClassSpaceSize,
+                      MaxMetaspaceSize - min_metaspace_sz);
+      }
+    }
+  } else if (min_metaspace_sz >= MaxMetaspaceSize) {
+    FLAG_SET_ERGO(uintx, InitialBootClassLoaderMetaspaceSize,
+                  min_metaspace_sz);
+  }
+
 }
 
 void Metaspace::global_initialize() {

test/runtime/Metaspace/MaxMetaspaceSizeTest.java

+/*
+ * Copyright (c) 2017, 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 com.oracle.java.testlibrary.ProcessTools;
+import com.oracle.java.testlibrary.OutputAnalyzer;
+
+/*
+ * @test MaxMetaspaceSizeTest
+ * @requires vm.bits == "64"
+ * @bug 8087291
+ * @library /testlibrary
+ * @run main/othervm MaxMetaspaceSizeTest
+ */
+
+public class MaxMetaspaceSizeTest {
+    public static void main(String... args) throws Exception {
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+            "-Xmx1g",
+            "-XX:InitialBootClassLoaderMetaspaceSize=4195328",
+            "-XX:MaxMetaspaceSize=4195328",
+            "-XX:+UseCompressedClassPointers",
+            "-XX:CompressedClassSpaceSize=1g",
+            "-version");
+        OutputAnalyzer output = new OutputAnalyzer(pb.start());
+        output.shouldContain("MaxMetaspaceSize is too small.");
+    }
+}