Tue, 23 Nov 2010 13:22:55 -0800
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
1 /*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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23 */
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPROMOTIONMANAGER_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPROMOTIONMANAGER_HPP
28 #include "gc_implementation/parallelScavenge/psPromotionLAB.hpp"
29 #include "memory/allocation.hpp"
30 #include "utilities/taskqueue.hpp"
32 //
33 // psPromotionManager is used by a single thread to manage object survival
34 // during a scavenge. The promotion manager contains thread local data only.
35 //
36 // NOTE! Be carefull when allocating the stacks on cheap. If you are going
37 // to use a promotion manager in more than one thread, the stacks MUST be
38 // on cheap. This can lead to memory leaks, though, as they are not auto
39 // deallocated.
40 //
41 // FIX ME FIX ME Add a destructor, and don't rely on the user to drain/flush/deallocate!
42 //
44 // Move to some global location
45 #define HAS_BEEN_MOVED 0x1501d01d
46 // End move to some global location
48 class MutableSpace;
49 class PSOldGen;
50 class ParCompactionManager;
52 class PSPromotionManager : public CHeapObj {
53 friend class PSScavenge;
54 friend class PSRefProcTaskExecutor;
55 private:
56 static PSPromotionManager** _manager_array;
57 static OopStarTaskQueueSet* _stack_array_depth;
58 static PSOldGen* _old_gen;
59 static MutableSpace* _young_space;
61 #if TASKQUEUE_STATS
62 size_t _masked_pushes;
63 size_t _masked_steals;
64 size_t _arrays_chunked;
65 size_t _array_chunks_processed;
67 void print_taskqueue_stats(uint i) const;
68 void print_local_stats(uint i) const;
69 static void print_stats();
71 void reset_stats();
72 #endif // TASKQUEUE_STATS
74 PSYoungPromotionLAB _young_lab;
75 PSOldPromotionLAB _old_lab;
76 bool _young_gen_is_full;
77 bool _old_gen_is_full;
79 OopStarTaskQueue _claimed_stack_depth;
80 OverflowTaskQueue<oop> _claimed_stack_breadth;
82 bool _totally_drain;
83 uint _target_stack_size;
85 uint _array_chunk_size;
86 uint _min_array_size_for_chunking;
88 // Accessors
89 static PSOldGen* old_gen() { return _old_gen; }
90 static MutableSpace* young_space() { return _young_space; }
92 inline static PSPromotionManager* manager_array(int index);
93 template <class T> inline void claim_or_forward_internal_depth(T* p);
95 // On the task queues we push reference locations as well as
96 // partially-scanned arrays (in the latter case, we push an oop to
97 // the from-space image of the array and the length on the
98 // from-space image indicates how many entries on the array we still
99 // need to scan; this is basically how ParNew does partial array
100 // scanning too). To be able to distinguish between reference
101 // locations and partially-scanned array oops we simply mask the
102 // latter oops with 0x01. The next three methods do the masking,
103 // unmasking, and checking whether the oop is masked or not. Notice
104 // that the signature of the mask and unmask methods looks a bit
105 // strange, as they accept and return different types (oop and
106 // oop*). This is because of the difference in types between what
107 // the task queue holds (oop*) and oops to partially-scanned arrays
108 // (oop). We do all the necessary casting in the mask / unmask
109 // methods to avoid sprinkling the rest of the code with more casts.
111 // These are added to the taskqueue so PS_CHUNKED_ARRAY_OOP_MASK (or any
112 // future masks) can't conflict with COMPRESSED_OOP_MASK
113 #define PS_CHUNKED_ARRAY_OOP_MASK 0x2
115 bool is_oop_masked(StarTask p) {
116 // If something is marked chunked it's always treated like wide oop*
117 return (((intptr_t)(oop*)p) & PS_CHUNKED_ARRAY_OOP_MASK) ==
118 PS_CHUNKED_ARRAY_OOP_MASK;
119 }
121 oop* mask_chunked_array_oop(oop obj) {
122 assert(!is_oop_masked((oop*) obj), "invariant");
123 oop* ret = (oop*) ((uintptr_t)obj | PS_CHUNKED_ARRAY_OOP_MASK);
124 assert(is_oop_masked(ret), "invariant");
125 return ret;
126 }
128 oop unmask_chunked_array_oop(StarTask p) {
129 assert(is_oop_masked(p), "invariant");
130 assert(!p.is_narrow(), "chunked array oops cannot be narrow");
131 oop *chunk = (oop*)p; // cast p to oop (uses conversion operator)
132 oop ret = oop((oop*)((uintptr_t)chunk & ~PS_CHUNKED_ARRAY_OOP_MASK));
133 assert(!is_oop_masked((oop*) ret), "invariant");
134 return ret;
135 }
137 template <class T> void process_array_chunk_work(oop obj,
138 int start, int end);
139 void process_array_chunk(oop old);
141 template <class T> void push_depth(T* p) {
142 claimed_stack_depth()->push(p);
143 }
145 protected:
146 static OopStarTaskQueueSet* stack_array_depth() { return _stack_array_depth; }
147 public:
148 // Static
149 static void initialize();
151 static void pre_scavenge();
152 static void post_scavenge();
154 static PSPromotionManager* gc_thread_promotion_manager(int index);
155 static PSPromotionManager* vm_thread_promotion_manager();
157 static bool steal_depth(int queue_num, int* seed, StarTask& t) {
158 return stack_array_depth()->steal(queue_num, seed, t);
159 }
161 PSPromotionManager();
163 // Accessors
164 OopStarTaskQueue* claimed_stack_depth() {
165 return &_claimed_stack_depth;
166 }
168 bool young_gen_is_full() { return _young_gen_is_full; }
170 bool old_gen_is_full() { return _old_gen_is_full; }
171 void set_old_gen_is_full(bool state) { _old_gen_is_full = state; }
173 // Promotion methods
174 oop copy_to_survivor_space(oop o);
175 oop oop_promotion_failed(oop obj, markOop obj_mark);
177 void reset();
179 void flush_labs();
180 void drain_stacks(bool totally_drain) {
181 drain_stacks_depth(totally_drain);
182 }
183 public:
184 void drain_stacks_cond_depth() {
185 if (claimed_stack_depth()->size() > _target_stack_size) {
186 drain_stacks_depth(false);
187 }
188 }
189 void drain_stacks_depth(bool totally_drain);
191 bool stacks_empty() {
192 return claimed_stack_depth()->is_empty();
193 }
195 inline void process_popped_location_depth(StarTask p);
197 template <class T> inline void claim_or_forward_depth(T* p);
199 TASKQUEUE_STATS_ONLY(inline void record_steal(StarTask& p);)
200 };
202 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPROMOTIONMANAGER_HPP