Mercurial > hg > graal-compiler
view src/share/vm/gc_implementation/g1/g1Allocator.hpp @ 20591:28051f14c328
8043158: Crash in CodeSweeperSweepNoFlushTest in CompileQueue::free_all()
Summary: Acquire lock before calling notify()
Reviewed-by: twisti, thartmann
author | anoll |
---|---|
date | Fri, 20 Jun 2014 09:25:13 +0200 |
parents | d35872270666 |
children |
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/* * Copyright (c) 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_G1ALLOCATOR_HPP #define SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCATOR_HPP #include "gc_implementation/g1/g1AllocationContext.hpp" #include "gc_implementation/g1/g1AllocRegion.hpp" #include "gc_implementation/shared/parGCAllocBuffer.hpp" enum GCAllocPurpose { GCAllocForTenured, GCAllocForSurvived, GCAllocPurposeCount }; // Base class for G1 allocators. class G1Allocator : public CHeapObj<mtGC> { friend class VMStructs; protected: G1CollectedHeap* _g1h; // Outside of GC pauses, the number of bytes used in all regions other // than the current allocation region. size_t _summary_bytes_used; public: G1Allocator(G1CollectedHeap* heap) : _g1h(heap), _summary_bytes_used(0) { } static G1Allocator* create_allocator(G1CollectedHeap* g1h); virtual void init_mutator_alloc_region() = 0; virtual void release_mutator_alloc_region() = 0; virtual void init_gc_alloc_regions(EvacuationInfo& evacuation_info) = 0; virtual void release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) = 0; virtual void abandon_gc_alloc_regions() = 0; virtual MutatorAllocRegion* mutator_alloc_region(AllocationContext_t context) = 0; virtual SurvivorGCAllocRegion* survivor_gc_alloc_region(AllocationContext_t context) = 0; virtual OldGCAllocRegion* old_gc_alloc_region(AllocationContext_t context) = 0; virtual size_t used() = 0; virtual bool is_retained_old_region(HeapRegion* hr) = 0; void reuse_retained_old_region(EvacuationInfo& evacuation_info, OldGCAllocRegion* old, HeapRegion** retained); size_t used_unlocked() const { return _summary_bytes_used; } void increase_used(size_t bytes) { _summary_bytes_used += bytes; } void decrease_used(size_t bytes) { assert(_summary_bytes_used >= bytes, err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" should be >= bytes: "SIZE_FORMAT, _summary_bytes_used, bytes)); _summary_bytes_used -= bytes; } void set_used(size_t bytes) { _summary_bytes_used = bytes; } virtual HeapRegion* new_heap_region(uint hrs_index, G1BlockOffsetSharedArray* sharedOffsetArray, MemRegion mr) { return new HeapRegion(hrs_index, sharedOffsetArray, mr); } }; // The default allocator for G1. class G1DefaultAllocator : public G1Allocator { protected: // Alloc region used to satisfy mutator allocation requests. MutatorAllocRegion _mutator_alloc_region; // Alloc region used to satisfy allocation requests by the GC for // survivor objects. SurvivorGCAllocRegion _survivor_gc_alloc_region; // Alloc region used to satisfy allocation requests by the GC for // old objects. OldGCAllocRegion _old_gc_alloc_region; HeapRegion* _retained_old_gc_alloc_region; public: G1DefaultAllocator(G1CollectedHeap* heap) : G1Allocator(heap), _retained_old_gc_alloc_region(NULL) { } virtual void init_mutator_alloc_region(); virtual void release_mutator_alloc_region(); virtual void init_gc_alloc_regions(EvacuationInfo& evacuation_info); virtual void release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info); virtual void abandon_gc_alloc_regions(); virtual bool is_retained_old_region(HeapRegion* hr) { return _retained_old_gc_alloc_region == hr; } virtual MutatorAllocRegion* mutator_alloc_region(AllocationContext_t context) { return &_mutator_alloc_region; } virtual SurvivorGCAllocRegion* survivor_gc_alloc_region(AllocationContext_t context) { return &_survivor_gc_alloc_region; } virtual OldGCAllocRegion* old_gc_alloc_region(AllocationContext_t context) { return &_old_gc_alloc_region; } virtual size_t used() { assert(Heap_lock->owner() != NULL, "Should be owned on this thread's behalf."); size_t result = _summary_bytes_used; // Read only once in case it is set to NULL concurrently HeapRegion* hr = mutator_alloc_region(AllocationContext::current())->get(); if (hr != NULL) { result += hr->used(); } return result; } }; class G1ParGCAllocBuffer: public ParGCAllocBuffer { private: bool _retired; public: G1ParGCAllocBuffer(size_t gclab_word_size); virtual ~G1ParGCAllocBuffer() { guarantee(_retired, "Allocation buffer has not been retired"); } virtual void set_buf(HeapWord* buf) { ParGCAllocBuffer::set_buf(buf); _retired = false; } virtual void retire(bool end_of_gc, bool retain) { if (_retired) { return; } ParGCAllocBuffer::retire(end_of_gc, retain); _retired = true; } }; class G1ParGCAllocator : public CHeapObj<mtGC> { friend class G1ParScanThreadState; protected: G1CollectedHeap* _g1h; size_t _alloc_buffer_waste; size_t _undo_waste; void add_to_alloc_buffer_waste(size_t waste) { _alloc_buffer_waste += waste; } void add_to_undo_waste(size_t waste) { _undo_waste += waste; } HeapWord* allocate_slow(GCAllocPurpose purpose, size_t word_sz, AllocationContext_t context); virtual void retire_alloc_buffers() = 0; virtual G1ParGCAllocBuffer* alloc_buffer(GCAllocPurpose purpose, AllocationContext_t context) = 0; public: G1ParGCAllocator(G1CollectedHeap* g1h) : _g1h(g1h), _alloc_buffer_waste(0), _undo_waste(0) { } static G1ParGCAllocator* create_allocator(G1CollectedHeap* g1h); size_t alloc_buffer_waste() { return _alloc_buffer_waste; } size_t undo_waste() {return _undo_waste; } HeapWord* allocate(GCAllocPurpose purpose, size_t word_sz, AllocationContext_t context) { HeapWord* obj = NULL; if (purpose == GCAllocForSurvived) { obj = alloc_buffer(purpose, context)->allocate_aligned(word_sz, SurvivorAlignmentInBytes); } else { obj = alloc_buffer(purpose, context)->allocate(word_sz); } if (obj != NULL) { return obj; } return allocate_slow(purpose, word_sz, context); } void undo_allocation(GCAllocPurpose purpose, HeapWord* obj, size_t word_sz, AllocationContext_t context) { if (alloc_buffer(purpose, context)->contains(obj)) { assert(alloc_buffer(purpose, context)->contains(obj + word_sz - 1), "should contain whole object"); alloc_buffer(purpose, context)->undo_allocation(obj, word_sz); } else { CollectedHeap::fill_with_object(obj, word_sz); add_to_undo_waste(word_sz); } } }; class G1DefaultParGCAllocator : public G1ParGCAllocator { G1ParGCAllocBuffer _surviving_alloc_buffer; G1ParGCAllocBuffer _tenured_alloc_buffer; G1ParGCAllocBuffer* _alloc_buffers[GCAllocPurposeCount]; public: G1DefaultParGCAllocator(G1CollectedHeap* g1h); virtual G1ParGCAllocBuffer* alloc_buffer(GCAllocPurpose purpose, AllocationContext_t context) { return _alloc_buffers[purpose]; } virtual void retire_alloc_buffers() ; }; #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCATOR_HPP