jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp@6701abbc4441 (annotated)

src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp@6701abbc4441 (annotated)

src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp

Tue, 19 Aug 2014 10:50:27 +0200

author: tschatzl
date: Tue, 19 Aug 2014 10:50:27 +0200
changeset 7050: 6701abbc4441
parent 7049: eec72fa4b108
child 7091: a8ea2f110d87
permissions: -rw-r--r--

8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
Summary: Let HeapRegionSeq manage the heap region and auxiliary data to decrease the amount of responsibilities of G1CollectedHeap, and encapsulate this work from other code.
Reviewed-by: jwilhelm, jmasa, mgerdin, brutisso

 /*
  * Copyright (c) 2001, 2014, 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_G1COLLECTEDHEAP_INLINE_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP
 #include "gc_implementation/g1/concurrentMark.hpp"
 #include "gc_implementation/g1/g1CollectedHeap.hpp"
 #include "gc_implementation/g1/g1AllocRegion.inline.hpp"
 #include "gc_implementation/g1/g1CollectorPolicy.hpp"
 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
 #include "gc_implementation/g1/heapRegionSet.inline.hpp"
 #include "gc_implementation/g1/heapRegionSeq.inline.hpp"
 #include "runtime/orderAccess.inline.hpp"
 #include "utilities/taskqueue.hpp"
 // Inline functions for G1CollectedHeap
 // Return the region with the given index. It assumes the index is valid.
 inline HeapRegion* G1CollectedHeap::region_at(uint index) const { return _hrs.at(index); }
 inline uint G1CollectedHeap::addr_to_region(HeapWord* addr) const {
   assert(is_in_reserved(addr),
          err_msg("Cannot calculate region index for address "PTR_FORMAT" that is outside of the heap ["PTR_FORMAT", "PTR_FORMAT")",
                  p2i(addr), p2i(_reserved.start()), p2i(_reserved.end())));
   return (uint)(pointer_delta(addr, _reserved.start(), sizeof(uint8_t)) >> HeapRegion::LogOfHRGrainBytes);
 }
 inline HeapWord* G1CollectedHeap::bottom_addr_for_region(uint index) const {
   return _hrs.reserved().start() + index * HeapRegion::GrainWords;
 }
 template <class T>
 inline HeapRegion* G1CollectedHeap::heap_region_containing_raw(const T addr) const {
   assert(addr != NULL, "invariant");
   assert(is_in_g1_reserved((const void*) addr),
       err_msg("Address "PTR_FORMAT" is outside of the heap ranging from ["PTR_FORMAT" to "PTR_FORMAT")",
           p2i((void*)addr), p2i(g1_reserved().start()), p2i(g1_reserved().end())));
   return _hrs.addr_to_region((HeapWord*) addr);
 }
 template <class T>
 inline HeapRegion* G1CollectedHeap::heap_region_containing(const T addr) const {
   HeapRegion* hr = heap_region_containing_raw(addr);
   if (hr->continuesHumongous()) {
     return hr->humongous_start_region();
   }
   return hr;
 }
 inline void G1CollectedHeap::reset_gc_time_stamp() {
   _gc_time_stamp = 0;
   OrderAccess::fence();
   // Clear the cached CSet starting regions and time stamps.
   // Their validity is dependent on the GC timestamp.
   clear_cset_start_regions();
 }
 inline void G1CollectedHeap::increment_gc_time_stamp() {
   ++_gc_time_stamp;
   OrderAccess::fence();
 }
 inline void G1CollectedHeap::old_set_remove(HeapRegion* hr) {
   _old_set.remove(hr);
 }
 inline bool G1CollectedHeap::obj_in_cs(oop obj) {
   HeapRegion* r = _hrs.addr_to_region((HeapWord*) obj);
   return r != NULL && r->in_collection_set();
 }
 inline HeapWord* G1CollectedHeap::attempt_allocation(size_t word_size,
                                                      unsigned int* gc_count_before_ret,
                                                      int* gclocker_retry_count_ret) {
   assert_heap_not_locked_and_not_at_safepoint();
   assert(!isHumongous(word_size), "attempt_allocation() should not "
          "be called for humongous allocation requests");
   HeapWord* result = _mutator_alloc_region.attempt_allocation(word_size,
                                                       false /* bot_updates */);
   if (result == NULL) {
     result = attempt_allocation_slow(word_size,
                                      gc_count_before_ret,
                                      gclocker_retry_count_ret);
   }
   assert_heap_not_locked();
   if (result != NULL) {
     dirty_young_block(result, word_size);
   }
   return result;
 }
 inline HeapWord* G1CollectedHeap::survivor_attempt_allocation(size_t
                                                               word_size) {
   assert(!isHumongous(word_size),
          "we should not be seeing humongous-size allocations in this path");
   HeapWord* result = _survivor_gc_alloc_region.attempt_allocation(word_size,
                                                       false /* bot_updates */);
   if (result == NULL) {
     MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag);
     result = _survivor_gc_alloc_region.attempt_allocation_locked(word_size,
                                                       false /* bot_updates */);
   }
   if (result != NULL) {
     dirty_young_block(result, word_size);
   }
   return result;
 }
 inline HeapWord* G1CollectedHeap::old_attempt_allocation(size_t word_size) {
   assert(!isHumongous(word_size),
          "we should not be seeing humongous-size allocations in this path");
   HeapWord* result = _old_gc_alloc_region.attempt_allocation(word_size,
                                                        true /* bot_updates */);
   if (result == NULL) {
     MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag);
     result = _old_gc_alloc_region.attempt_allocation_locked(word_size,
                                                        true /* bot_updates */);
   }
   return result;
 }
 // It dirties the cards that cover the block so that so that the post
 // write barrier never queues anything when updating objects on this
 // block. It is assumed (and in fact we assert) that the block
 // belongs to a young region.
 inline void
 G1CollectedHeap::dirty_young_block(HeapWord* start, size_t word_size) {
   assert_heap_not_locked();
   // Assign the containing region to containing_hr so that we don't
   // have to keep calling heap_region_containing_raw() in the
   // asserts below.
   DEBUG_ONLY(HeapRegion* containing_hr = heap_region_containing_raw(start);)
   assert(word_size > 0, "pre-condition");
   assert(containing_hr->is_in(start), "it should contain start");
   assert(containing_hr->is_young(), "it should be young");
   assert(!containing_hr->isHumongous(), "it should not be humongous");
   HeapWord* end = start + word_size;
   assert(containing_hr->is_in(end - 1), "it should also contain end - 1");
   MemRegion mr(start, end);
   g1_barrier_set()->g1_mark_as_young(mr);
 }
 inline RefToScanQueue* G1CollectedHeap::task_queue(int i) const {
   return _task_queues->queue(i);
 }
 inline bool G1CollectedHeap::isMarkedPrev(oop obj) const {
   return _cm->prevMarkBitMap()->isMarked((HeapWord *)obj);
 }
 inline bool G1CollectedHeap::isMarkedNext(oop obj) const {
   return _cm->nextMarkBitMap()->isMarked((HeapWord *)obj);
 }
 // This is a fast test on whether a reference points into the
 // collection set or not. Assume that the reference
 // points into the heap.
 inline bool G1CollectedHeap::is_in_cset(oop obj) {
   bool ret = _in_cset_fast_test.is_in_cset((HeapWord*)obj);
   // let's make sure the result is consistent with what the slower
   // test returns
   assert( ret || !obj_in_cs(obj), "sanity");
   assert(!ret ||  obj_in_cs(obj), "sanity");
   return ret;
 }
 bool G1CollectedHeap::is_in_cset_or_humongous(const oop obj) {
   return _in_cset_fast_test.is_in_cset_or_humongous((HeapWord*)obj);
 }
 G1CollectedHeap::in_cset_state_t G1CollectedHeap::in_cset_state(const oop obj) {
   return _in_cset_fast_test.at((HeapWord*)obj);
 }
 void G1CollectedHeap::register_humongous_region_with_in_cset_fast_test(uint index) {
   _in_cset_fast_test.set_humongous(index);
 }
 #ifndef PRODUCT
 // Support for G1EvacuationFailureALot
 inline bool
 G1CollectedHeap::evacuation_failure_alot_for_gc_type(bool gcs_are_young,
                                                      bool during_initial_mark,
                                                      bool during_marking) {
   bool res = false;
   if (during_marking) {
     res |= G1EvacuationFailureALotDuringConcMark;
   }
   if (during_initial_mark) {
     res |= G1EvacuationFailureALotDuringInitialMark;
   }
   if (gcs_are_young) {
     res |= G1EvacuationFailureALotDuringYoungGC;
   } else {
     // GCs are mixed
     res |= G1EvacuationFailureALotDuringMixedGC;
   }
   return res;
 }
 inline void
 G1CollectedHeap::set_evacuation_failure_alot_for_current_gc() {
   if (G1EvacuationFailureALot) {
     // Note we can't assert that _evacuation_failure_alot_for_current_gc
     // is clear here. It may have been set during a previous GC but that GC
     // did not copy enough objects (i.e. G1EvacuationFailureALotCount) to
     // trigger an evacuation failure and clear the flags and and counts.
     // Check if we have gone over the interval.
     const size_t gc_num = total_collections();
     const size_t elapsed_gcs = gc_num - _evacuation_failure_alot_gc_number;
     _evacuation_failure_alot_for_current_gc = (elapsed_gcs >= G1EvacuationFailureALotInterval);
     // Now check if G1EvacuationFailureALot is enabled for the current GC type.
     const bool gcs_are_young = g1_policy()->gcs_are_young();
     const bool during_im = g1_policy()->during_initial_mark_pause();
     const bool during_marking = mark_in_progress();
     _evacuation_failure_alot_for_current_gc &=
       evacuation_failure_alot_for_gc_type(gcs_are_young,
                                           during_im,
                                           during_marking);
   }
 }
 inline bool G1CollectedHeap::evacuation_should_fail() {
   if (!G1EvacuationFailureALot || !_evacuation_failure_alot_for_current_gc) {
     return false;
   }
   // G1EvacuationFailureALot is in effect for current GC
   // Access to _evacuation_failure_alot_count is not atomic;
   // the value does not have to be exact.
   if (++_evacuation_failure_alot_count < G1EvacuationFailureALotCount) {
     return false;
   }
   _evacuation_failure_alot_count = 0;
   return true;
 }
 inline void G1CollectedHeap::reset_evacuation_should_fail() {
   if (G1EvacuationFailureALot) {
     _evacuation_failure_alot_gc_number = total_collections();
     _evacuation_failure_alot_count = 0;
     _evacuation_failure_alot_for_current_gc = false;
   }
 }
 #endif  // #ifndef PRODUCT
 inline bool G1CollectedHeap::is_in_young(const oop obj) {
   if (obj == NULL) {
     return false;
   }
   return heap_region_containing(obj)->is_young();
 }
 // We don't need barriers for initializing stores to objects
 // in the young gen: for the SATB pre-barrier, there is no
 // pre-value that needs to be remembered; for the remembered-set
 // update logging post-barrier, we don't maintain remembered set
 // information for young gen objects.
 inline bool G1CollectedHeap::can_elide_initializing_store_barrier(oop new_obj) {
   return is_in_young(new_obj);
 }
 inline bool G1CollectedHeap::is_obj_dead(const oop obj) const {
   if (obj == NULL) {
     return false;
   }
   return is_obj_dead(obj, heap_region_containing(obj));
 }
 inline bool G1CollectedHeap::is_obj_ill(const oop obj) const {
   if (obj == NULL) {
     return false;
   }
   return is_obj_ill(obj, heap_region_containing(obj));
 }
 inline void G1CollectedHeap::set_humongous_is_live(oop obj) {
   uint region = addr_to_region((HeapWord*)obj);
   // We not only set the "live" flag in the humongous_is_live table, but also
   // reset the entry in the _in_cset_fast_test table so that subsequent references
   // to the same humongous object do not go into the slow path again.
   // This is racy, as multiple threads may at the same time enter here, but this
   // is benign.
   // During collection we only ever set the "live" flag, and only ever clear the
   // entry in the in_cset_fast_table.
   // We only ever evaluate the contents of these tables (in the VM thread) after
   // having synchronized the worker threads with the VM thread, or in the same
   // thread (i.e. within the VM thread).
   if (!_humongous_is_live.is_live(region)) {
     _humongous_is_live.set_live(region);
     _in_cset_fast_test.clear_humongous(region);
   }
 }
 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp@6701abbc4441 (annotated)

src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp