1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 #include "precompiled.hpp"
  25 
  26 #include "classfile/classLoaderData.hpp"
  27 #include "memory/iterator.hpp"
  28 #include "memory/metaspace.hpp"
  29 #include "runtime/interfaceSupport.hpp"
  30 #include "runtime/vm_operations.hpp"
  31 #include "runtime/vmThread.hpp"
  32 #include "unittest.hpp"
  33 
  34 // The test function is only available in debug builds
  35 #ifdef ASSERT
  36 
  37 void Metaspace_test_anonymous_delegating_classloader_sizing(ClassLoaderMetaspace* msp);
  38 
  39 class VerifyMetaspaceSizingClosure : public CLDClosure {
  40 public:
  41   VerifyMetaspaceSizingClosure()  { }
  42   void do_cld(ClassLoaderData* cld) {
  43     assert(SafepointSynchronize::is_at_safepoint(), "Must be at a safepoint");
  44     ClassLoaderMetaspace* msp = cld->metaspace_or_null();
  45     // defined in metaspace.cpp
  46     if (msp != NULL) {
  47       Metaspace_test_anonymous_delegating_classloader_sizing(msp);
  48     }
  49   }
  50 };
  51 
  52 class VM_WalkCLDAtSafepoint : public VM_GTestExecuteAtSafepoint {
  53 public:
  54   VM_WalkCLDAtSafepoint() { }
  55   void doit() {
  56     VerifyMetaspaceSizingClosure cl;
  57     ClassLoaderDataGraph::cld_do(&cl);
  58   }
  59 };
  60 
  61 
  62 class MetaspaceSizingTest {
  63 public:
  64   static void test_anon_delegating_classloader_metadata_sizing() {
  65     ThreadInVMfromNative invm(JavaThread::current());
  66     VM_WalkCLDAtSafepoint op;
  67     VMThread::execute(&op);    
  68   }
  69 };
  70 
  71 TEST_VM(Metaspace, anon_and_delegating_classloader_sizing) {
  72   MetaspaceSizingTest::test_anon_delegating_classloader_metadata_sizing();
  73 }
  74 
  75 #endif // ASSERT