Mercurial > hg > graal-jvmci-8
view src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp @ 2153:377371490991
Merge
author | johnc |
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date | Thu, 20 Jan 2011 13:57:12 -0800 |
parents | 0fa27f37d4d4 |
children | abdfc822206f |
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/* * Copyright (c) 2001, 2011, 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/g1CollectorPolicy.hpp" #include "gc_implementation/g1/heapRegionSeq.inline.hpp" #include "utilities/taskqueue.hpp" // Inline functions for G1CollectedHeap inline HeapRegion* G1CollectedHeap::heap_region_containing(const void* addr) const { HeapRegion* hr = _hrs->addr_to_region(addr); // hr can be null if addr in perm_gen if (hr != NULL && hr->continuesHumongous()) { hr = hr->humongous_start_region(); } return hr; } inline HeapRegion* G1CollectedHeap::heap_region_containing_raw(const void* addr) const { assert(_g1_reserved.contains(addr), "invariant"); size_t index = pointer_delta(addr, _g1_reserved.start(), 1) >> HeapRegion::LogOfHRGrainBytes; HeapRegion* res = _hrs->at(index); assert(res == _hrs->addr_to_region(addr), "sanity"); return res; } inline bool G1CollectedHeap::obj_in_cs(oop obj) { HeapRegion* r = _hrs->addr_to_region(obj); return r != NULL && r->in_collection_set(); } // See the comment in the .hpp file about the locking protocol and // assumptions of this method (and other related ones). inline HeapWord* G1CollectedHeap::allocate_from_cur_alloc_region(HeapRegion* cur_alloc_region, size_t word_size, bool with_heap_lock) { assert_not_at_safepoint(); assert(with_heap_lock == Heap_lock->owned_by_self(), "with_heap_lock and Heap_lock->owned_by_self() should be a tautology"); assert(cur_alloc_region != NULL, "pre-condition of the method"); assert(cur_alloc_region->is_young(), "we only support young current alloc regions"); assert(!isHumongous(word_size), "allocate_from_cur_alloc_region() " "should not be used for humongous allocations"); assert(!cur_alloc_region->isHumongous(), "Catch a regression of this bug."); assert(!cur_alloc_region->is_empty(), err_msg("region ["PTR_FORMAT","PTR_FORMAT"] should not be empty", cur_alloc_region->bottom(), cur_alloc_region->end())); HeapWord* result = cur_alloc_region->par_allocate_no_bot_updates(word_size); if (result != NULL) { assert(is_in(result), "result should be in the heap"); if (with_heap_lock) { Heap_lock->unlock(); } assert_heap_not_locked(); // Do the dirtying after we release the Heap_lock. dirty_young_block(result, word_size); return result; } if (with_heap_lock) { assert_heap_locked(); } else { assert_heap_not_locked(); } return NULL; } // See the comment in the .hpp file about the locking protocol and // assumptions of this method (and other related ones). inline HeapWord* G1CollectedHeap::attempt_allocation(size_t word_size) { assert_heap_not_locked_and_not_at_safepoint(); assert(!isHumongous(word_size), "attempt_allocation() should not be called " "for humongous allocation requests"); HeapRegion* cur_alloc_region = _cur_alloc_region; if (cur_alloc_region != NULL) { HeapWord* result = allocate_from_cur_alloc_region(cur_alloc_region, word_size, false /* with_heap_lock */); assert_heap_not_locked(); if (result != NULL) { return result; } } // Our attempt to allocate lock-free failed as the current // allocation region is either NULL or full. So, we'll now take the // Heap_lock and retry. Heap_lock->lock(); HeapWord* result = attempt_allocation_locked(word_size); if (result != NULL) { assert_heap_not_locked(); return result; } assert_heap_locked(); return NULL; } inline void G1CollectedHeap::retire_cur_alloc_region_common(HeapRegion* cur_alloc_region) { assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); assert(cur_alloc_region != NULL && cur_alloc_region == _cur_alloc_region, "pre-condition of the call"); assert(cur_alloc_region->is_young(), "we only support young current alloc regions"); // The region is guaranteed to be young g1_policy()->add_region_to_incremental_cset_lhs(cur_alloc_region); _summary_bytes_used += cur_alloc_region->used(); _cur_alloc_region = NULL; } inline HeapWord* G1CollectedHeap::attempt_allocation_locked(size_t word_size) { assert_heap_locked_and_not_at_safepoint(); assert(!isHumongous(word_size), "attempt_allocation_locked() " "should not be called for humongous allocation requests"); // First, reread the current alloc region and retry the allocation // in case somebody replaced it while we were waiting to get the // Heap_lock. HeapRegion* cur_alloc_region = _cur_alloc_region; if (cur_alloc_region != NULL) { HeapWord* result = allocate_from_cur_alloc_region( cur_alloc_region, word_size, true /* with_heap_lock */); if (result != NULL) { assert_heap_not_locked(); return result; } // We failed to allocate out of the current alloc region, so let's // retire it before getting a new one. retire_cur_alloc_region(cur_alloc_region); } assert_heap_locked(); // Try to get a new region and allocate out of it HeapWord* result = replace_cur_alloc_region_and_allocate(word_size, false, /* at_safepoint */ true, /* do_dirtying */ false /* can_expand */); if (result != NULL) { assert_heap_not_locked(); return result; } assert_heap_locked(); return NULL; } // 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); ((CardTableModRefBS*)_g1h->barrier_set())->dirty(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); } #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP