1 /*
   2  * Copyright (c) 1997, 2014, 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 
  25 #include "precompiled.hpp"
  26 #include "classfile/classLoaderData.inline.hpp"
  27 #include "classfile/dictionary.hpp"
  28 #include "classfile/javaClasses.hpp"
  29 #include "classfile/loaderConstraints.hpp"
  30 #include "classfile/placeholders.hpp"
  31 #include "classfile/resolutionErrors.hpp"
  32 #include "classfile/stringTable.hpp"
  33 #include "classfile/systemDictionary.hpp"
  34 #include "classfile/vmSymbols.hpp"

  35 #include "compiler/compileBroker.hpp"
  36 #include "interpreter/bytecodeStream.hpp"
  37 #include "interpreter/interpreter.hpp"
  38 #include "memory/filemap.hpp"
  39 #include "memory/gcLocker.hpp"
  40 #include "memory/oopFactory.hpp"
  41 #include "oops/instanceKlass.hpp"
  42 #include "oops/instanceRefKlass.hpp"
  43 #include "oops/klass.inline.hpp"
  44 #include "oops/methodData.hpp"
  45 #include "oops/objArrayKlass.hpp"
  46 #include "oops/oop.inline.hpp"
  47 #include "oops/oop.inline2.hpp"
  48 #include "oops/typeArrayKlass.hpp"
  49 #include "prims/jvmtiEnvBase.hpp"
  50 #include "prims/methodHandles.hpp"
  51 #include "runtime/arguments.hpp"
  52 #include "runtime/biasedLocking.hpp"
  53 #include "runtime/fieldType.hpp"
  54 #include "runtime/handles.inline.hpp"

1610 }
1611 
1612 
1613 // ----------------------------------------------------------------------------
1614 // Update hierachy. This is done before the new klass has been added to the SystemDictionary. The Recompile_lock
1615 // is held, to ensure that the compiler is not using the class hierachy, and that deoptimization will kick in
1616 // before a new class is used.
1617 
1618 void SystemDictionary::add_to_hierarchy(instanceKlassHandle k, TRAPS) {
1619   assert(k.not_null(), "just checking");
1620   assert_locked_or_safepoint(Compile_lock);
1621 
1622   // Link into hierachy. Make sure the vtables are initialized before linking into
1623   k->append_to_sibling_list();                    // add to superklass/sibling list
1624   k->process_interfaces(THREAD);                  // handle all "implements" declarations
1625   k->set_init_state(InstanceKlass::loaded);
1626   // Now flush all code that depended on old class hierarchy.
1627   // Note: must be done *after* linking k into the hierarchy (was bug 12/9/97)
1628   // Also, first reinitialize vtable because it may have gotten out of synch
1629   // while the new class wasn't connected to the class hierarchy.
1630   Universe::flush_dependents_on(k);
1631 }
1632 
1633 // ----------------------------------------------------------------------------
1634 // GC support
1635 
1636 // Following roots during mark-sweep is separated in two phases.
1637 //
1638 // The first phase follows preloaded classes and all other system
1639 // classes, since these will never get unloaded anyway.
1640 //
1641 // The second phase removes (unloads) unreachable classes from the
1642 // system dictionary and follows the remaining classes' contents.
1643 
1644 void SystemDictionary::always_strong_oops_do(OopClosure* blk) {
1645   roots_oops_do(blk, NULL);
1646 }
1647 
1648 void SystemDictionary::always_strong_classes_do(KlassClosure* closure) {
1649   // Follow all system classes and temporary placeholders in dictionary
1650   dictionary()->always_strong_classes_do(closure);

   1 /*
   2  * Copyright (c) 1997, 2015, 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 
  25 #include "precompiled.hpp"
  26 #include "classfile/classLoaderData.inline.hpp"
  27 #include "classfile/dictionary.hpp"
  28 #include "classfile/javaClasses.hpp"
  29 #include "classfile/loaderConstraints.hpp"
  30 #include "classfile/placeholders.hpp"
  31 #include "classfile/resolutionErrors.hpp"
  32 #include "classfile/stringTable.hpp"
  33 #include "classfile/systemDictionary.hpp"
  34 #include "classfile/vmSymbols.hpp"
  35 #include "code/codeCache.hpp"
  36 #include "compiler/compileBroker.hpp"
  37 #include "interpreter/bytecodeStream.hpp"
  38 #include "interpreter/interpreter.hpp"
  39 #include "memory/filemap.hpp"
  40 #include "memory/gcLocker.hpp"
  41 #include "memory/oopFactory.hpp"
  42 #include "oops/instanceKlass.hpp"
  43 #include "oops/instanceRefKlass.hpp"
  44 #include "oops/klass.inline.hpp"
  45 #include "oops/methodData.hpp"
  46 #include "oops/objArrayKlass.hpp"
  47 #include "oops/oop.inline.hpp"
  48 #include "oops/oop.inline2.hpp"
  49 #include "oops/typeArrayKlass.hpp"
  50 #include "prims/jvmtiEnvBase.hpp"
  51 #include "prims/methodHandles.hpp"
  52 #include "runtime/arguments.hpp"
  53 #include "runtime/biasedLocking.hpp"
  54 #include "runtime/fieldType.hpp"
  55 #include "runtime/handles.inline.hpp"

1611 }
1612 
1613 
1614 // ----------------------------------------------------------------------------
1615 // Update hierachy. This is done before the new klass has been added to the SystemDictionary. The Recompile_lock
1616 // is held, to ensure that the compiler is not using the class hierachy, and that deoptimization will kick in
1617 // before a new class is used.
1618 
1619 void SystemDictionary::add_to_hierarchy(instanceKlassHandle k, TRAPS) {
1620   assert(k.not_null(), "just checking");
1621   assert_locked_or_safepoint(Compile_lock);
1622 
1623   // Link into hierachy. Make sure the vtables are initialized before linking into
1624   k->append_to_sibling_list();                    // add to superklass/sibling list
1625   k->process_interfaces(THREAD);                  // handle all "implements" declarations
1626   k->set_init_state(InstanceKlass::loaded);
1627   // Now flush all code that depended on old class hierarchy.
1628   // Note: must be done *after* linking k into the hierarchy (was bug 12/9/97)
1629   // Also, first reinitialize vtable because it may have gotten out of synch
1630   // while the new class wasn't connected to the class hierarchy.
1631   CodeCache::flush_dependents_on(k);
1632 }
1633 
1634 // ----------------------------------------------------------------------------
1635 // GC support
1636 
1637 // Following roots during mark-sweep is separated in two phases.
1638 //
1639 // The first phase follows preloaded classes and all other system
1640 // classes, since these will never get unloaded anyway.
1641 //
1642 // The second phase removes (unloads) unreachable classes from the
1643 // system dictionary and follows the remaining classes' contents.
1644 
1645 void SystemDictionary::always_strong_oops_do(OopClosure* blk) {
1646   roots_oops_do(blk, NULL);
1647 }
1648 
1649 void SystemDictionary::always_strong_classes_do(KlassClosure* closure) {
1650   // Follow all system classes and temporary placeholders in dictionary
1651   dictionary()->always_strong_classes_do(closure);