ysr@777: /*
johnc@4016:  * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
ysr@777:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@777:  *
ysr@777:  * This code is free software; you can redistribute it and/or modify it
ysr@777:  * under the terms of the GNU General Public License version 2 only, as
ysr@777:  * published by the Free Software Foundation.
ysr@777:  *
ysr@777:  * This code is distributed in the hope that it will be useful, but WITHOUT
ysr@777:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@777:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ysr@777:  * version 2 for more details (a copy is included in the LICENSE file that
ysr@777:  * accompanied this code).
ysr@777:  *
ysr@777:  * You should have received a copy of the GNU General Public License version
ysr@777:  * 2 along with this work; if not, write to the Free Software Foundation,
ysr@777:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@777:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
ysr@777:  *
ysr@777:  */
ysr@777: 
stefank@2314: #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP
stefank@2314: #define SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP
stefank@2314: 
stefank@2314: #include "gc_implementation/g1/concurrentMark.hpp"
stefank@2314: #include "gc_implementation/g1/g1CollectedHeap.hpp"
tonyp@2715: #include "gc_implementation/g1/g1AllocRegion.inline.hpp"
tonyp@2315: #include "gc_implementation/g1/g1CollectorPolicy.hpp"
tonyp@2469: #include "gc_implementation/g1/heapRegionSeq.inline.hpp"
stefank@2314: #include "utilities/taskqueue.hpp"
stefank@2314: 
ysr@777: // Inline functions for G1CollectedHeap
ysr@777: 
tonyp@2963: template <class T>
ysr@777: inline HeapRegion*
tonyp@2963: G1CollectedHeap::heap_region_containing(const T addr) const {
tonyp@2963:   HeapRegion* hr = _hrs.addr_to_region((HeapWord*) addr);
ysr@777:   // hr can be null if addr in perm_gen
ysr@777:   if (hr != NULL && hr->continuesHumongous()) {
ysr@777:     hr = hr->humongous_start_region();
ysr@777:   }
ysr@777:   return hr;
ysr@777: }
ysr@777: 
tonyp@2963: template <class T>
ysr@777: inline HeapRegion*
tonyp@2963: G1CollectedHeap::heap_region_containing_raw(const T addr) const {
tonyp@2963:   assert(_g1_reserved.contains((const void*) addr), "invariant");
tonyp@2963:   HeapRegion* res = _hrs.addr_to_region_unsafe((HeapWord*) addr);
ysr@777:   return res;
ysr@777: }
ysr@777: 
ysr@777: inline bool G1CollectedHeap::obj_in_cs(oop obj) {
tonyp@2963:   HeapRegion* r = _hrs.addr_to_region((HeapWord*) obj);
ysr@777:   return r != NULL && r->in_collection_set();
ysr@777: }
ysr@777: 
tonyp@2315: inline HeapWord*
tonyp@2715: G1CollectedHeap::attempt_allocation(size_t word_size,
tonyp@2715:                                     unsigned int* gc_count_before_ret) {
tonyp@2715:   assert_heap_not_locked_and_not_at_safepoint();
tonyp@2715:   assert(!isHumongous(word_size), "attempt_allocation() should not "
tonyp@2715:          "be called for humongous allocation requests");
ysr@777: 
tonyp@2715:   HeapWord* result = _mutator_alloc_region.attempt_allocation(word_size,
tonyp@2715:                                                       false /* bot_updates */);
tonyp@2715:   if (result == NULL) {
tonyp@2715:     result = attempt_allocation_slow(word_size, gc_count_before_ret);
tonyp@2715:   }
tonyp@2715:   assert_heap_not_locked();
tonyp@2315:   if (result != NULL) {
tonyp@2315:     dirty_young_block(result, word_size);
tonyp@2315:   }
tonyp@2715:   return result;
tonyp@2454: }
tonyp@2454: 
tonyp@3028: inline HeapWord* G1CollectedHeap::survivor_attempt_allocation(size_t
tonyp@3028:                                                               word_size) {
tonyp@3028:   assert(!isHumongous(word_size),
tonyp@3028:          "we should not be seeing humongous-size allocations in this path");
tonyp@3028: 
tonyp@3028:   HeapWord* result = _survivor_gc_alloc_region.attempt_allocation(word_size,
tonyp@3028:                                                       false /* bot_updates */);
tonyp@3028:   if (result == NULL) {
tonyp@3028:     MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag);
tonyp@3028:     result = _survivor_gc_alloc_region.attempt_allocation_locked(word_size,
tonyp@3028:                                                       false /* bot_updates */);
tonyp@3028:   }
tonyp@3028:   if (result != NULL) {
tonyp@3028:     dirty_young_block(result, word_size);
tonyp@3028:   }
tonyp@3028:   return result;
tonyp@3028: }
tonyp@3028: 
tonyp@3028: inline HeapWord* G1CollectedHeap::old_attempt_allocation(size_t word_size) {
tonyp@3028:   assert(!isHumongous(word_size),
tonyp@3028:          "we should not be seeing humongous-size allocations in this path");
tonyp@3028: 
tonyp@3028:   HeapWord* result = _old_gc_alloc_region.attempt_allocation(word_size,
tonyp@3028:                                                        true /* bot_updates */);
tonyp@3028:   if (result == NULL) {
tonyp@3028:     MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag);
tonyp@3028:     result = _old_gc_alloc_region.attempt_allocation_locked(word_size,
tonyp@3028:                                                        true /* bot_updates */);
tonyp@3028:   }
tonyp@3028:   return result;
tonyp@3028: }
tonyp@3028: 
tonyp@2315: // It dirties the cards that cover the block so that so that the post
tonyp@2315: // write barrier never queues anything when updating objects on this
tonyp@2315: // block. It is assumed (and in fact we assert) that the block
tonyp@2315: // belongs to a young region.
tonyp@2315: inline void
tonyp@2315: G1CollectedHeap::dirty_young_block(HeapWord* start, size_t word_size) {
tonyp@2315:   assert_heap_not_locked();
tonyp@2315: 
tonyp@2315:   // Assign the containing region to containing_hr so that we don't
tonyp@2315:   // have to keep calling heap_region_containing_raw() in the
tonyp@2315:   // asserts below.
tonyp@2315:   DEBUG_ONLY(HeapRegion* containing_hr = heap_region_containing_raw(start);)
tonyp@2315:   assert(containing_hr != NULL && start != NULL && word_size > 0,
tonyp@2315:          "pre-condition");
tonyp@2315:   assert(containing_hr->is_in(start), "it should contain start");
tonyp@2315:   assert(containing_hr->is_young(), "it should be young");
tonyp@2315:   assert(!containing_hr->isHumongous(), "it should not be humongous");
tonyp@2315: 
tonyp@2315:   HeapWord* end = start + word_size;
tonyp@2315:   assert(containing_hr->is_in(end - 1), "it should also contain end - 1");
tonyp@2315: 
tonyp@2315:   MemRegion mr(start, end);
tonyp@2315:   ((CardTableModRefBS*)_g1h->barrier_set())->dirty(mr);
ysr@777: }
ysr@777: 
jcoomes@2064: inline RefToScanQueue* G1CollectedHeap::task_queue(int i) const {
ysr@777:   return _task_queues->queue(i);
ysr@777: }
ysr@777: 
johnc@4016: inline bool G1CollectedHeap::isMarkedPrev(oop obj) const {
ysr@777:   return _cm->prevMarkBitMap()->isMarked((HeapWord *)obj);
ysr@777: }
ysr@777: 
ysr@777: inline bool G1CollectedHeap::isMarkedNext(oop obj) const {
ysr@777:   return _cm->nextMarkBitMap()->isMarked((HeapWord *)obj);
ysr@777: }
stefank@2314: 
johnc@4016: #ifndef PRODUCT
johnc@4016: // Support for G1EvacuationFailureALot
johnc@4016: 
johnc@4016: inline bool
johnc@4016: G1CollectedHeap::evacuation_failure_alot_for_gc_type(bool gcs_are_young,
johnc@4016:                                                      bool during_initial_mark,
johnc@4016:                                                      bool during_marking) {
johnc@4016:   bool res = false;
johnc@4016:   if (during_marking) {
johnc@4016:     res |= G1EvacuationFailureALotDuringConcMark;
johnc@4016:   }
johnc@4016:   if (during_initial_mark) {
johnc@4016:     res |= G1EvacuationFailureALotDuringInitialMark;
johnc@4016:   }
johnc@4016:   if (gcs_are_young) {
johnc@4016:     res |= G1EvacuationFailureALotDuringYoungGC;
johnc@4016:   } else {
johnc@4016:     // GCs are mixed
johnc@4016:     res |= G1EvacuationFailureALotDuringMixedGC;
johnc@4016:   }
johnc@4016:   return res;
johnc@4016: }
johnc@4016: 
johnc@4016: inline void
johnc@4016: G1CollectedHeap::set_evacuation_failure_alot_for_current_gc() {
johnc@4016:   if (G1EvacuationFailureALot) {
johnc@4016:     // Note we can't assert that _evacuation_failure_alot_for_current_gc
johnc@4016:     // is clear here. It may have been set during a previous GC but that GC
johnc@4016:     // did not copy enough objects (i.e. G1EvacuationFailureALotCount) to
johnc@4016:     // trigger an evacuation failure and clear the flags and and counts.
johnc@4016: 
johnc@4016:     // Check if we have gone over the interval.
johnc@4016:     const size_t gc_num = total_collections();
johnc@4016:     const size_t elapsed_gcs = gc_num - _evacuation_failure_alot_gc_number;
johnc@4016: 
johnc@4016:     _evacuation_failure_alot_for_current_gc = (elapsed_gcs >= G1EvacuationFailureALotInterval);
johnc@4016: 
johnc@4016:     // Now check if G1EvacuationFailureALot is enabled for the current GC type.
johnc@4016:     const bool gcs_are_young = g1_policy()->gcs_are_young();
johnc@4016:     const bool during_im = g1_policy()->during_initial_mark_pause();
johnc@4016:     const bool during_marking = mark_in_progress();
johnc@4016: 
johnc@4016:     _evacuation_failure_alot_for_current_gc &=
johnc@4016:       evacuation_failure_alot_for_gc_type(gcs_are_young,
johnc@4016:                                           during_im,
johnc@4016:                                           during_marking);
johnc@4016:   }
johnc@4016: }
johnc@4016: 
johnc@4016: inline bool
johnc@4016: G1CollectedHeap::evacuation_should_fail() {
johnc@4016:   if (!G1EvacuationFailureALot || !_evacuation_failure_alot_for_current_gc) {
johnc@4016:     return false;
johnc@4016:   }
johnc@4016:   // G1EvacuationFailureALot is in effect for current GC
johnc@4016:   // Access to _evacuation_failure_alot_count is not atomic;
johnc@4016:   // the value does not have to be exact.
johnc@4016:   if (++_evacuation_failure_alot_count < G1EvacuationFailureALotCount) {
johnc@4016:     return false;
johnc@4016:   }
johnc@4016:   _evacuation_failure_alot_count = 0;
johnc@4016:   return true;
johnc@4016: }
johnc@4016: 
johnc@4016: inline void G1CollectedHeap::reset_evacuation_should_fail() {
johnc@4016:   if (G1EvacuationFailureALot) {
johnc@4016:     _evacuation_failure_alot_gc_number = total_collections();
johnc@4016:     _evacuation_failure_alot_count = 0;
johnc@4016:     _evacuation_failure_alot_for_current_gc = false;
johnc@4016:   }
johnc@4016: }
johnc@4016: #endif  // #ifndef PRODUCT
johnc@4016: 
stefank@2314: #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP