jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/satbQueue.hpp@a248d0be1309 (annotated)

src/share/vm/gc_implementation/g1/satbQueue.hpp@a248d0be1309 (annotated)

src/share/vm/gc_implementation/g1/satbQueue.hpp

Mon, 19 Aug 2019 10:11:31 +0200

author: neugens
date: Mon, 19 Aug 2019 10:11:31 +0200
changeset 9861: a248d0be1309
parent 7834: 399885e13e90
child 7994: 04ff2f6cd0eb
permissions: -rw-r--r--

8229401: Fix JFR code cache test failures
8223689: Add JFR Thread Sampling Support
8223690: Add JFR BiasedLock Event Support
8223691: Add JFR G1 Region Type Change Event Support
8223692: Add JFR G1 Heap Summary Event Support
Summary: Backport JFR from JDK11, additional fixes
Reviewed-by: neugens, apetushkov
Contributed-by: denghui.ddh@alibaba-inc.com

 /*
  * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_SATBQUEUE_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_G1_SATBQUEUE_HPP
 #include "memory/allocation.hpp"
 #include "gc_implementation/g1/ptrQueue.hpp"
 class JavaThread;
 class SATBMarkQueueSet;
 // Base class for processing the contents of a SATB buffer.
 class SATBBufferClosure : public StackObj {
 protected:
   ~SATBBufferClosure() { }
 public:
   // Process the SATB entries in the designated buffer range.
   virtual void do_buffer(void** buffer, size_t size) = 0;
 };
 // A ptrQueue whose elements are "oops", pointers to object heads.
 class ObjPtrQueue: public PtrQueue {
   friend class SATBMarkQueueSet;
 private:
   // Filter out unwanted entries from the buffer.
   void filter();
 public:
   ObjPtrQueue(PtrQueueSet* qset, bool perm = false) :
     // SATB queues are only active during marking cycles. We create
     // them with their active field set to false. If a thread is
     // created during a cycle and its SATB queue needs to be activated
     // before the thread starts running, we'll need to set its active
     // field to true. This is done in JavaThread::initialize_queues().
     PtrQueue(qset, perm, false /* active */) { }
   // Process queue entries and free resources.
   void flush();
   // Apply cl to the active part of the buffer.
   // Prerequisite: Must be at a safepoint.
   void apply_closure_and_empty(SATBBufferClosure* cl);
   // Overrides PtrQueue::should_enqueue_buffer(). See the method's
   // definition for more information.
   virtual bool should_enqueue_buffer();
 #ifndef PRODUCT
   // Helpful for debugging
   void print(const char* name);
   static void print(const char* name, void** buf, size_t index, size_t sz);
 #endif // PRODUCT
 };
 class SATBMarkQueueSet: public PtrQueueSet {
   ObjPtrQueue _shared_satb_queue;
 #ifdef ASSERT
   void dump_active_states(bool expected_active);
   void verify_active_states(bool expected_active);
 #endif // ASSERT
 public:
   SATBMarkQueueSet();
   void initialize(Monitor* cbl_mon, Mutex* fl_lock,
                   int process_completed_threshold,
                   Mutex* lock);
   static void handle_zero_index_for_thread(JavaThread* t);
   // Apply "set_active(active)" to all SATB queues in the set. It should be
   // called only with the world stopped. The method will assert that the
   // SATB queues of all threads it visits, as well as the SATB queue
   // set itself, has an active value same as expected_active.
   void set_active_all_threads(bool active, bool expected_active);
   // Filter all the currently-active SATB buffers.
   void filter_thread_buffers();
   // If there exists some completed buffer, pop and process it, and
   // return true.  Otherwise return false.  Processing a buffer
   // consists of applying the closure to the buffer range starting
   // with the first non-NULL entry to the end of the buffer; the
   // leading entries may be NULL due to filtering.
   bool apply_closure_to_completed_buffer(SATBBufferClosure* cl);
 #ifndef PRODUCT
   // Helpful for debugging
   void print_all(const char* msg);
 #endif // PRODUCT
   ObjPtrQueue* shared_satb_queue() { return &_shared_satb_queue; }
   // If a marking is being abandoned, reset any unprocessed log buffers.
   void abandon_partial_marking();
 };
 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_SATBQUEUE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/satbQueue.hpp@a248d0be1309 (annotated)

src/share/vm/gc_implementation/g1/satbQueue.hpp