jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp@92ef81e2f571

8003557: NPG: Klass* const k should be const Klass* k.
Summary: With NPG, const KlassOop klass which is in fact a definition converted to Klass* const, which is not the original intention. The right usage is converting them to const Klass*.
Reviewed-by: coleenp, kvn
Contributed-by: yumin.qi@oracle.com

     1 /*

     2  * Copyright (c) 2005, 2013, 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  */

    25 #include "precompiled.hpp"

    26 #include "classfile/systemDictionary.hpp"

    27 #include "code/codeCache.hpp"

    28 #include "gc_implementation/parallelScavenge/pcTasks.hpp"

    29 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"

    30 #include "gc_interface/collectedHeap.hpp"

    31 #include "memory/universe.hpp"

    32 #include "oops/objArrayKlass.inline.hpp"

    33 #include "oops/oop.inline.hpp"

    34 #include "oops/oop.pcgc.inline.hpp"

    35 #include "prims/jvmtiExport.hpp"

    36 #include "runtime/fprofiler.hpp"

    37 #include "runtime/jniHandles.hpp"

    38 #include "runtime/thread.hpp"

    39 #include "runtime/vmThread.hpp"

    40 #include "services/management.hpp"

    42 //

    43 // ThreadRootsMarkingTask

    44 //

    46 void ThreadRootsMarkingTask::do_it(GCTaskManager* manager, uint which) {

    47   assert(Universe::heap()->is_gc_active(), "called outside gc");

    49   ResourceMark rm;

    51   NOT_PRODUCT(TraceTime tm("ThreadRootsMarkingTask",

    52     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

    53   ParCompactionManager* cm =

    54     ParCompactionManager::gc_thread_compaction_manager(which);

    56   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);

    57   CLDToOopClosure mark_and_push_from_clds(&mark_and_push_closure, true);

    58   CodeBlobToOopClosure mark_and_push_in_blobs(&mark_and_push_closure, /*do_marking=*/ true);

    60   if (_java_thread != NULL)

    61     _java_thread->oops_do(

    62         &mark_and_push_closure,

    63         &mark_and_push_from_clds,

    64         &mark_and_push_in_blobs);

    66   if (_vm_thread != NULL)

    67     _vm_thread->oops_do(

    68         &mark_and_push_closure,

    69         &mark_and_push_from_clds,

    70         &mark_and_push_in_blobs);

    72   // Do the real work

    73   cm->follow_marking_stacks();

    74 }

    77 void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) {

    78   assert(Universe::heap()->is_gc_active(), "called outside gc");

    80   NOT_PRODUCT(TraceTime tm("MarkFromRootsTask",

    81     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

    82   ParCompactionManager* cm =

    83     ParCompactionManager::gc_thread_compaction_manager(which);

    84   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);

    85   PSParallelCompact::FollowKlassClosure follow_klass_closure(&mark_and_push_closure);

    87   switch (_root_type) {

    88     case universe:

    89       Universe::oops_do(&mark_and_push_closure);

    90       break;

    92     case jni_handles:

    93       JNIHandles::oops_do(&mark_and_push_closure);

    94       break;

    96     case threads:

    97     {

    98       ResourceMark rm;

    99       CodeBlobToOopClosure each_active_code_blob(&mark_and_push_closure, /*do_marking=*/ true);

   100       CLDToOopClosure mark_and_push_from_cld(&mark_and_push_closure);

   101       Threads::oops_do(&mark_and_push_closure, &mark_and_push_from_cld, &each_active_code_blob);

   102     }

   103     break;

   105     case object_synchronizer:

   106       ObjectSynchronizer::oops_do(&mark_and_push_closure);

   107       break;

   109     case flat_profiler:

   110       FlatProfiler::oops_do(&mark_and_push_closure);

   111       break;

   113     case management:

   114       Management::oops_do(&mark_and_push_closure);

   115       break;

   117     case jvmti:

   118       JvmtiExport::oops_do(&mark_and_push_closure);

   119       break;

   121     case system_dictionary:

   122       SystemDictionary::always_strong_oops_do(&mark_and_push_closure);

   123       ClassLoaderDataGraph::always_strong_oops_do(&mark_and_push_closure, &follow_klass_closure, true);

   124       break;

   126     case code_cache:

   127       // Do not treat nmethods as strong roots for mark/sweep, since we can unload them.

   128       //CodeCache::scavenge_root_nmethods_do(CodeBlobToOopClosure(&mark_and_push_closure));

   129       break;

   131     default:

   132       fatal("Unknown root type");

   133   }

   135   // Do the real work

   136   cm->follow_marking_stacks();

   137 }

   140 //

   141 // RefProcTaskProxy

   142 //

   144 void RefProcTaskProxy::do_it(GCTaskManager* manager, uint which)

   145 {

   146   assert(Universe::heap()->is_gc_active(), "called outside gc");

   148   NOT_PRODUCT(TraceTime tm("RefProcTask",

   149     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

   150   ParCompactionManager* cm =

   151     ParCompactionManager::gc_thread_compaction_manager(which);

   152   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);

   153   PSParallelCompact::FollowStackClosure follow_stack_closure(cm);

   154   _rp_task.work(_work_id, *PSParallelCompact::is_alive_closure(),

   155                 mark_and_push_closure, follow_stack_closure);

   156 }

   158 //

   159 // RefProcTaskExecutor

   160 //

   162 void RefProcTaskExecutor::execute(ProcessTask& task)

   163 {

   164   ParallelScavengeHeap* heap = PSParallelCompact::gc_heap();

   165   uint parallel_gc_threads = heap->gc_task_manager()->workers();

   166   uint active_gc_threads = heap->gc_task_manager()->active_workers();

   167   RegionTaskQueueSet* qset = ParCompactionManager::region_array();

   168   ParallelTaskTerminator terminator(active_gc_threads, qset);

   169   GCTaskQueue* q = GCTaskQueue::create();

   170   for(uint i=0; i<parallel_gc_threads; i++) {

   171     q->enqueue(new RefProcTaskProxy(task, i));

   172   }

   173   if (task.marks_oops_alive()) {

   174     if (parallel_gc_threads>1) {

   175       for (uint j=0; j<active_gc_threads; j++) {

   176         q->enqueue(new StealMarkingTask(&terminator));

   177       }

   178     }

   179   }

   180   PSParallelCompact::gc_task_manager()->execute_and_wait(q);

   181 }

   183 void RefProcTaskExecutor::execute(EnqueueTask& task)

   184 {

   185   ParallelScavengeHeap* heap = PSParallelCompact::gc_heap();

   186   uint parallel_gc_threads = heap->gc_task_manager()->workers();

   187   GCTaskQueue* q = GCTaskQueue::create();

   188   for(uint i=0; i<parallel_gc_threads; i++) {

   189     q->enqueue(new RefEnqueueTaskProxy(task, i));

   190   }

   191   PSParallelCompact::gc_task_manager()->execute_and_wait(q);

   192 }

   194 //

   195 // StealMarkingTask

   196 //

   198 StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) :

   199   _terminator(t) {}

   201 void StealMarkingTask::do_it(GCTaskManager* manager, uint which) {

   202   assert(Universe::heap()->is_gc_active(), "called outside gc");

   204   NOT_PRODUCT(TraceTime tm("StealMarkingTask",

   205     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

   207   ParCompactionManager* cm =

   208     ParCompactionManager::gc_thread_compaction_manager(which);

   209   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);

   211   oop obj = NULL;

   212   ObjArrayTask task;

   213   int random_seed = 17;

   214   do {

   215     while (ParCompactionManager::steal_objarray(which, &random_seed, task)) {

   216       ObjArrayKlass* k = (ObjArrayKlass*)task.obj()->klass();

   217       k->oop_follow_contents(cm, task.obj(), task.index());

   218       cm->follow_marking_stacks();

   219     }

   220     while (ParCompactionManager::steal(which, &random_seed, obj)) {

   221       obj->follow_contents(cm);

   222       cm->follow_marking_stacks();

   223     }

   224   } while (!terminator()->offer_termination());

   225 }

   227 //

   228 // StealRegionCompactionTask

   229 //

   231 StealRegionCompactionTask::StealRegionCompactionTask(ParallelTaskTerminator* t):

   232   _terminator(t) {}

   234 void StealRegionCompactionTask::do_it(GCTaskManager* manager, uint which) {

   235   assert(Universe::heap()->is_gc_active(), "called outside gc");

   237   NOT_PRODUCT(TraceTime tm("StealRegionCompactionTask",

   238     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

   240   ParCompactionManager* cm =

   241     ParCompactionManager::gc_thread_compaction_manager(which);

   244   // If not all threads are active, get a draining stack

   245   // from the list.  Else, just use this threads draining stack.

   246   uint which_stack_index;

   247   bool use_all_workers = manager->all_workers_active();

   248   if (use_all_workers) {

   249     which_stack_index = which;

   250     assert(manager->active_workers() == ParallelGCThreads,

   251            err_msg("all_workers_active has been incorrectly set: "

   252                    " active %d  ParallelGCThreads %d", manager->active_workers(),

   253                    ParallelGCThreads));

   254   } else {

   255     which_stack_index = ParCompactionManager::pop_recycled_stack_index();

   256   }

   258   cm->set_region_stack_index(which_stack_index);

   259   cm->set_region_stack(ParCompactionManager::region_list(which_stack_index));

   260   if (TraceDynamicGCThreads) {

   261     gclog_or_tty->print_cr("StealRegionCompactionTask::do_it "

   262                            "region_stack_index %d region_stack = 0x%x "

   263                            " empty (%d) use all workers %d",

   264     which_stack_index, ParCompactionManager::region_list(which_stack_index),

   265     cm->region_stack()->is_empty(),

   266     use_all_workers);

   267   }

   269   // Has to drain stacks first because there may be regions on

   270   // preloaded onto the stack and this thread may never have

   271   // done a draining task.  Are the draining tasks needed?

   273   cm->drain_region_stacks();

   275   size_t region_index = 0;

   276   int random_seed = 17;

   278   // If we're the termination task, try 10 rounds of stealing before

   279   // setting the termination flag

   281   while(true) {

   282     if (ParCompactionManager::steal(which, &random_seed, region_index)) {

   283       PSParallelCompact::fill_and_update_region(cm, region_index);

   284       cm->drain_region_stacks();

   285     } else {

   286       if (terminator()->offer_termination()) {

   287         break;

   288       }

   289       // Go around again.

   290     }

   291   }

   292   return;

   293 }

   295 UpdateDensePrefixTask::UpdateDensePrefixTask(

   296                                    PSParallelCompact::SpaceId space_id,

   297                                    size_t region_index_start,

   298                                    size_t region_index_end) :

   299   _space_id(space_id), _region_index_start(region_index_start),

   300   _region_index_end(region_index_end) {}

   302 void UpdateDensePrefixTask::do_it(GCTaskManager* manager, uint which) {

   304   NOT_PRODUCT(TraceTime tm("UpdateDensePrefixTask",

   305     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

   307   ParCompactionManager* cm =

   308     ParCompactionManager::gc_thread_compaction_manager(which);

   310   PSParallelCompact::update_and_deadwood_in_dense_prefix(cm,

   311                                                          _space_id,

   312                                                          _region_index_start,

   313                                                          _region_index_end);

   314 }

   316 void DrainStacksCompactionTask::do_it(GCTaskManager* manager, uint which) {

   317   assert(Universe::heap()->is_gc_active(), "called outside gc");

   319   NOT_PRODUCT(TraceTime tm("DrainStacksCompactionTask",

   320     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

   322   ParCompactionManager* cm =

   323     ParCompactionManager::gc_thread_compaction_manager(which);

   325   uint which_stack_index;

   326   bool use_all_workers = manager->all_workers_active();

   327   if (use_all_workers) {

   328     which_stack_index = which;

   329     assert(manager->active_workers() == ParallelGCThreads,

   330            err_msg("all_workers_active has been incorrectly set: "

   331                    " active %d  ParallelGCThreads %d", manager->active_workers(),

   332                    ParallelGCThreads));

   333   } else {

   334     which_stack_index = stack_index();

   335   }

   337   cm->set_region_stack(ParCompactionManager::region_list(which_stack_index));

   338   if (TraceDynamicGCThreads) {

   339     gclog_or_tty->print_cr("DrainStacksCompactionTask::do_it which = %d "

   340                            "which_stack_index = %d/empty(%d) "

   341                            "use all workers %d",

   342                            which, which_stack_index,

   343                            cm->region_stack()->is_empty(),

   344                            use_all_workers);

   345   }

   347   cm->set_region_stack_index(which_stack_index);

   349   // Process any regions already in the compaction managers stacks.

   350   cm->drain_region_stacks();

   352   assert(cm->region_stack()->is_empty(), "Not empty");

   354   if (!use_all_workers) {

   355     // Always give up the region stack.

   356     assert(cm->region_stack() ==

   357            ParCompactionManager::region_list(cm->region_stack_index()),

   358            "region_stack and region_stack_index are inconsistent");

   359     ParCompactionManager::push_recycled_stack_index(cm->region_stack_index());

   361     if (TraceDynamicGCThreads) {

   362       void* old_region_stack = (void*) cm->region_stack();

   363       int old_region_stack_index = cm->region_stack_index();

   364       gclog_or_tty->print_cr("Pushing region stack 0x%x/%d",

   365         old_region_stack, old_region_stack_index);

   366     }

   368     cm->set_region_stack(NULL);

   369     cm->set_region_stack_index((uint)max_uintx);

   370   }

   371 }

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp@92ef81e2f571

src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp