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/*
* Copyright (c) 2001, 2012, 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/heapRegionSeq.inline.hpp"
#include "utilities/taskqueue.hpp"
// Inline functions for G1CollectedHeap
template <class T>
inline HeapRegion*
G1CollectedHeap::heap_region_containing(const T addr) const {
HeapRegion* hr = _hrs.addr_to_region((HeapWord*) addr);
// hr can be null if addr in perm_gen
if (hr != NULL && hr->continuesHumongous()) {
hr = hr->humongous_start_region();
}
return hr;
}
template <class T>
inline HeapRegion*
G1CollectedHeap::heap_region_containing_raw(const T addr) const {
assert(_g1_reserved.contains((const void*) addr), "invariant");
HeapRegion* res = _hrs.addr_to_region_unsafe((HeapWord*) addr);
return res;
}
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(containing_hr != NULL && start != NULL && 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);
}
#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
#endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP
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