duke@435: /*
xdono@631:  * Copyright 2002-2008 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: #include "incls/_precompiled.incl"
duke@435: #include "incls/_psTasks.cpp.incl"
duke@435: 
duke@435: //
duke@435: // ScavengeRootsTask
duke@435: //
duke@435: 
duke@435: // Define before use
duke@435: class PSScavengeRootsClosure: public OopClosure {
duke@435:  private:
duke@435:   PSPromotionManager* _promotion_manager;
duke@435: 
coleenp@548:  protected:
coleenp@548:   template <class T> void do_oop_work(T *p) {
coleenp@548:     if (PSScavenge::should_scavenge(p)) {
duke@435:       // We never card mark roots, maybe call a func without test?
duke@435:       PSScavenge::copy_and_push_safe_barrier(_promotion_manager, p);
duke@435:     }
duke@435:   }
coleenp@548:  public:
coleenp@548:   PSScavengeRootsClosure(PSPromotionManager* pm) : _promotion_manager(pm) { }
coleenp@548:   void do_oop(oop* p)       { PSScavengeRootsClosure::do_oop_work(p); }
coleenp@548:   void do_oop(narrowOop* p) { PSScavengeRootsClosure::do_oop_work(p); }
duke@435: };
duke@435: 
duke@435: void ScavengeRootsTask::do_it(GCTaskManager* manager, uint which) {
duke@435:   assert(Universe::heap()->is_gc_active(), "called outside gc");
duke@435: 
duke@435:   PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which);
duke@435:   PSScavengeRootsClosure roots_closure(pm);
duke@435: 
duke@435:   switch (_root_type) {
duke@435:     case universe:
duke@435:       Universe::oops_do(&roots_closure);
duke@435:       ReferenceProcessor::oops_do(&roots_closure);
duke@435:       break;
duke@435: 
duke@435:     case jni_handles:
duke@435:       JNIHandles::oops_do(&roots_closure);
duke@435:       break;
duke@435: 
duke@435:     case threads:
duke@435:     {
duke@435:       ResourceMark rm;
duke@435:       Threads::oops_do(&roots_closure);
duke@435:     }
duke@435:     break;
duke@435: 
duke@435:     case object_synchronizer:
duke@435:       ObjectSynchronizer::oops_do(&roots_closure);
duke@435:       break;
duke@435: 
duke@435:     case flat_profiler:
duke@435:       FlatProfiler::oops_do(&roots_closure);
duke@435:       break;
duke@435: 
duke@435:     case system_dictionary:
duke@435:       SystemDictionary::oops_do(&roots_closure);
duke@435:       break;
duke@435: 
duke@435:     case management:
duke@435:       Management::oops_do(&roots_closure);
duke@435:       break;
duke@435: 
duke@435:     case jvmti:
duke@435:       JvmtiExport::oops_do(&roots_closure);
duke@435:       break;
duke@435: 
duke@435:     default:
duke@435:       fatal("Unknown root type");
duke@435:   }
duke@435: 
duke@435:   // Do the real work
duke@435:   pm->drain_stacks(false);
duke@435: }
duke@435: 
duke@435: //
duke@435: // ThreadRootsTask
duke@435: //
duke@435: 
duke@435: void ThreadRootsTask::do_it(GCTaskManager* manager, uint which) {
duke@435:   assert(Universe::heap()->is_gc_active(), "called outside gc");
duke@435: 
duke@435:   PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which);
duke@435:   PSScavengeRootsClosure roots_closure(pm);
duke@435: 
duke@435:   if (_java_thread != NULL)
duke@435:     _java_thread->oops_do(&roots_closure);
duke@435: 
duke@435:   if (_vm_thread != NULL)
duke@435:     _vm_thread->oops_do(&roots_closure);
duke@435: 
duke@435:   // Do the real work
duke@435:   pm->drain_stacks(false);
duke@435: }
duke@435: 
duke@435: //
duke@435: // StealTask
duke@435: //
duke@435: 
duke@435: StealTask::StealTask(ParallelTaskTerminator* t) :
duke@435:   _terminator(t) {}
duke@435: 
duke@435: void StealTask::do_it(GCTaskManager* manager, uint which) {
duke@435:   assert(Universe::heap()->is_gc_active(), "called outside gc");
duke@435: 
duke@435:   PSPromotionManager* pm =
duke@435:     PSPromotionManager::gc_thread_promotion_manager(which);
duke@435:   pm->drain_stacks(true);
duke@435:   guarantee(pm->stacks_empty(),
duke@435:             "stacks should be empty at this point");
duke@435: 
duke@435:   int random_seed = 17;
duke@435:   if (pm->depth_first()) {
duke@435:     while(true) {
coleenp@548:       StarTask p;
duke@435:       if (PSPromotionManager::steal_depth(which, &random_seed, p)) {
duke@435: #if PS_PM_STATS
duke@435:         pm->increment_steals(p);
duke@435: #endif // PS_PM_STATS
duke@435:         pm->process_popped_location_depth(p);
duke@435:         pm->drain_stacks_depth(true);
duke@435:       } else {
duke@435:         if (terminator()->offer_termination()) {
duke@435:           break;
duke@435:         }
duke@435:       }
duke@435:     }
duke@435:   } else {
duke@435:     while(true) {
duke@435:       oop obj;
duke@435:       if (PSPromotionManager::steal_breadth(which, &random_seed, obj)) {
duke@435: #if PS_PM_STATS
duke@435:         pm->increment_steals();
duke@435: #endif // PS_PM_STATS
duke@435:         obj->copy_contents(pm);
duke@435:         pm->drain_stacks_breadth(true);
duke@435:       } else {
duke@435:         if (terminator()->offer_termination()) {
duke@435:           break;
duke@435:         }
duke@435:       }
duke@435:     }
duke@435:   }
coleenp@548:   guarantee(pm->stacks_empty(), "stacks should be empty at this point");
duke@435: }
duke@435: 
duke@435: //
duke@435: // SerialOldToYoungRootsTask
duke@435: //
duke@435: 
duke@435: void SerialOldToYoungRootsTask::do_it(GCTaskManager* manager, uint which) {
duke@435:   assert(_gen != NULL, "Sanity");
duke@435:   assert(_gen->object_space()->contains(_gen_top) || _gen_top == _gen->object_space()->top(), "Sanity");
duke@435: 
duke@435:   {
duke@435:     PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which);
duke@435: 
duke@435:     assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
duke@435:     CardTableExtension* card_table = (CardTableExtension *)Universe::heap()->barrier_set();
duke@435:     // FIX ME! Assert that card_table is the type we believe it to be.
duke@435: 
duke@435:     card_table->scavenge_contents(_gen->start_array(),
duke@435:                                   _gen->object_space(),
duke@435:                                   _gen_top,
duke@435:                                   pm);
duke@435: 
duke@435:     // Do the real work
duke@435:     pm->drain_stacks(false);
duke@435:   }
duke@435: }
duke@435: 
duke@435: //
duke@435: // OldToYoungRootsTask
duke@435: //
duke@435: 
duke@435: void OldToYoungRootsTask::do_it(GCTaskManager* manager, uint which) {
duke@435:   assert(_gen != NULL, "Sanity");
duke@435:   assert(_gen->object_space()->contains(_gen_top) || _gen_top == _gen->object_space()->top(), "Sanity");
duke@435:   assert(_stripe_number < ParallelGCThreads, "Sanity");
duke@435: 
duke@435:   {
duke@435:     PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which);
duke@435: 
duke@435:     assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
duke@435:     CardTableExtension* card_table = (CardTableExtension *)Universe::heap()->barrier_set();
duke@435:     // FIX ME! Assert that card_table is the type we believe it to be.
duke@435: 
duke@435:     card_table->scavenge_contents_parallel(_gen->start_array(),
duke@435:                                            _gen->object_space(),
duke@435:                                            _gen_top,
duke@435:                                            pm,
duke@435:                                            _stripe_number);
duke@435: 
duke@435:     // Do the real work
duke@435:     pm->drain_stacks(false);
duke@435:   }
duke@435: }