jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1RootProcessor.hpp@a248d0be1309 (annotated)

src/share/vm/gc_implementation/g1/g1RootProcessor.hpp@a248d0be1309 (annotated)

src/share/vm/gc_implementation/g1/g1RootProcessor.hpp

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

author: neugens
date: Mon, 19 Aug 2019 10:11:31 +0200
changeset 9861: a248d0be1309
parent 9358: 6a4a6c499e89
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) 2015, 2018, 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_ROOTPROCESSOR_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_G1_ROOTPROCESSOR_HPP
 #include "memory/allocation.hpp"
 #include "memory/sharedHeap.hpp"
 #include "runtime/mutex.hpp"
 class CLDClosure;
 class CodeBlobClosure;
 class G1CollectedHeap;
 class G1GCPhaseTimes;
 class G1ParPushHeapRSClosure;
 class G1RootClosures;
 class Monitor;
 class OopClosure;
 class SubTasksDone;
 // Scoped object to assist in applying oop, CLD and code blob closures to
 // root locations. Handles claiming of different root scanning tasks
 // and takes care of global state for root scanning via a StrongRootsScope.
 // In the parallel case there is a shared G1RootProcessor object where all
 // worker thread call the process_roots methods.
 class G1RootProcessor : public StackObj {
   G1CollectedHeap* _g1h;
   SubTasksDone _process_strong_tasks;
   SharedHeap::StrongRootsScope _srs;
   // Used to implement the Thread work barrier.
   Monitor _lock;
   volatile jint _n_workers_discovered_strong_classes;
   enum G1H_process_roots_tasks {
     G1RP_PS_Universe_oops_do,
     G1RP_PS_JNIHandles_oops_do,
     G1RP_PS_ObjectSynchronizer_oops_do,
     G1RP_PS_FlatProfiler_oops_do,
     G1RP_PS_Management_oops_do,
     G1RP_PS_SystemDictionary_oops_do,
     G1RP_PS_ClassLoaderDataGraph_oops_do,
     G1RP_PS_jvmti_oops_do,
     G1RP_PS_CodeCache_oops_do,
     G1RP_PS_filter_satb_buffers,
     G1RP_PS_refProcessor_oops_do,
     // Leave this one last.
     G1RP_PS_NumElements
   };
   void worker_has_discovered_all_strong_classes();
   void wait_until_all_strong_classes_discovered();
   void process_all_roots(OopClosure* oops,
                          CLDClosure* clds,
                          CodeBlobClosure* blobs,
                          bool process_string_table);
   void process_java_roots(OopClosure* scan_non_heap_roots,
                           CLDClosure* thread_stack_clds,
                           CLDClosure* scan_strong_clds,
                           CLDClosure* scan_weak_clds,
                           CodeBlobClosure* scan_strong_code,
                           G1GCPhaseTimes* phase_times,
                           uint worker_i);
   void process_vm_roots(OopClosure* scan_non_heap_roots,
                         OopClosure* scan_non_heap_weak_roots,
                         G1GCPhaseTimes* phase_times,
                         uint worker_i);
   void process_string_table_roots(OopClosure* scan_non_heap_weak_roots,
                                   G1GCPhaseTimes* phase_times,
                                   uint worker_i);
   void process_code_cache_roots(CodeBlobClosure* code_closure,
                                 G1GCPhaseTimes* phase_times,
                                 uint worker_i);
 public:
   G1RootProcessor(G1CollectedHeap* g1h);
   // Apply closures to the strongly and weakly reachable roots in the system
   // in a single pass.
   // Record and report timing measurements for sub phases using the worker_i
   void evacuate_roots(OopClosure* scan_non_heap_roots,
                       OopClosure* scan_non_heap_weak_roots,
                       CLDClosure* scan_strong_clds,
                       CLDClosure* scan_weak_clds,
                       bool trace_metadata,
                       uint worker_i);
   // Apply oops, clds and blobs to all strongly reachable roots in the system
   void process_strong_roots(OopClosure* oops,
                             CLDClosure* clds,
                             CodeBlobClosure* blobs);
   // Apply oops, clds and blobs to strongly and weakly reachable roots in the system
   void process_all_roots(OopClosure* oops,
                          CLDClosure* clds,
                          CodeBlobClosure* blobs);
   // Apply scan_rs to all locations in the union of the remembered sets for all
   // regions in the collection set
   // (having done "set_region" to indicate the region in which the root resides),
   void scan_remembered_sets(G1ParPushHeapRSClosure* scan_rs,
                             OopClosure* scan_non_heap_weak_roots,
                             uint worker_i);
   // Apply oops, clds and blobs to strongly and weakly reachable roots in the system,
   // the only thing different from process_all_roots is that we skip the string table
   // to avoid keeping every string live when doing class unloading.
   void process_all_roots_no_string_table(OopClosure* oops,
                                          CLDClosure* clds,
                                          CodeBlobClosure* blobs);
   // Inform the root processor about the number of worker threads
   void set_num_workers(int active_workers);
 };
 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_ROOTPROCESSOR_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/g1RootProcessor.hpp@a248d0be1309 (annotated)

src/share/vm/gc_implementation/g1/g1RootProcessor.hpp