1 /*
   2  * Copyright (c) 2003, 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  *

3749 //
3750 // If the can_redefine_classes capability is obtained in the onload
3751 // phase then the compiler has recorded all dependencies from startup.
3752 // In that case we need only deoptimize and throw away all compiled code
3753 // that depends on the class.
3754 //
3755 // If can_redefine_classes is obtained sometime after the onload
3756 // phase then the dependency information may be incomplete. In that case
3757 // the first call to RedefineClasses causes all compiled code to be
3758 // thrown away. As can_redefine_classes has been obtained then
3759 // all future compilations will record dependencies so second and
3760 // subsequent calls to RedefineClasses need only throw away code
3761 // that depends on the class.
3762 //
3763 void VM_RedefineClasses::flush_dependent_code(instanceKlassHandle k_h, TRAPS) {
3764   assert_locked_or_safepoint(Compile_lock);
3765 
3766   // All dependencies have been recorded from startup or this is a second or
3767   // subsequent use of RedefineClasses
3768   if (JvmtiExport::all_dependencies_are_recorded()) {
3769     Universe::flush_evol_dependents_on(k_h);
3770   } else {
3771     CodeCache::mark_all_nmethods_for_deoptimization();
3772 
3773     ResourceMark rm(THREAD);
3774     DeoptimizationMarker dm;
3775 
3776     // Deoptimize all activations depending on marked nmethods
3777     Deoptimization::deoptimize_dependents();
3778 
3779     // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies)
3780     CodeCache::make_marked_nmethods_not_entrant();
3781 
3782     // From now on we know that the dependency information is complete
3783     JvmtiExport::set_all_dependencies_are_recorded(true);
3784   }
3785 }
3786 
3787 void VM_RedefineClasses::compute_added_deleted_matching_methods() {
3788   Method* old_method;
3789   Method* new_method;

   1 /*
   2  * Copyright (c) 2003, 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  *

3749 //
3750 // If the can_redefine_classes capability is obtained in the onload
3751 // phase then the compiler has recorded all dependencies from startup.
3752 // In that case we need only deoptimize and throw away all compiled code
3753 // that depends on the class.
3754 //
3755 // If can_redefine_classes is obtained sometime after the onload
3756 // phase then the dependency information may be incomplete. In that case
3757 // the first call to RedefineClasses causes all compiled code to be
3758 // thrown away. As can_redefine_classes has been obtained then
3759 // all future compilations will record dependencies so second and
3760 // subsequent calls to RedefineClasses need only throw away code
3761 // that depends on the class.
3762 //
3763 void VM_RedefineClasses::flush_dependent_code(instanceKlassHandle k_h, TRAPS) {
3764   assert_locked_or_safepoint(Compile_lock);
3765 
3766   // All dependencies have been recorded from startup or this is a second or
3767   // subsequent use of RedefineClasses
3768   if (JvmtiExport::all_dependencies_are_recorded()) {
3769     CodeCache::flush_evol_dependents_on(k_h);
3770   } else {
3771     CodeCache::mark_all_nmethods_for_deoptimization();
3772 
3773     ResourceMark rm(THREAD);
3774     DeoptimizationMarker dm;
3775 
3776     // Deoptimize all activations depending on marked nmethods
3777     Deoptimization::deoptimize_dependents();
3778 
3779     // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies)
3780     CodeCache::make_marked_nmethods_not_entrant();
3781 
3782     // From now on we know that the dependency information is complete
3783     JvmtiExport::set_all_dependencies_are_recorded(true);
3784   }
3785 }
3786 
3787 void VM_RedefineClasses::compute_added_deleted_matching_methods() {
3788   Method* old_method;
3789   Method* new_method;