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comparison: src/share/vm/gc_implementation/shared/markSweep.cpp

src/share/vm/gc_implementation/shared/markSweep.cpp

changeset 4384
b735136e0d82
parent 4142
d8ce2825b193
child 5011
a08c80e9e1e5
equal deleted inserted replaced
4383:1de1b145f6bc 4384:b735136e0d82
39 Stack<markOop, mtGC> MarkSweep::_preserved_mark_stack; 39 Stack<markOop, mtGC> MarkSweep::_preserved_mark_stack;
40 size_t MarkSweep::_preserved_count = 0; 40 size_t MarkSweep::_preserved_count = 0;
41 size_t MarkSweep::_preserved_count_max = 0; 41 size_t MarkSweep::_preserved_count_max = 0;
42 PreservedMark* MarkSweep::_preserved_marks = NULL; 42 PreservedMark* MarkSweep::_preserved_marks = NULL;
43 ReferenceProcessor* MarkSweep::_ref_processor = NULL; 43 ReferenceProcessor* MarkSweep::_ref_processor = NULL;
44
45 #ifdef VALIDATE_MARK_SWEEP
46 GrowableArray<void*>* MarkSweep::_root_refs_stack = NULL;
47 GrowableArray<oop> * MarkSweep::_live_oops = NULL;
48 GrowableArray<oop> * MarkSweep::_live_oops_moved_to = NULL;
49 GrowableArray<size_t>* MarkSweep::_live_oops_size = NULL;
50 size_t MarkSweep::_live_oops_index = 0;
51 size_t MarkSweep::_live_oops_index_at_perm = 0;
52 GrowableArray<void*>* MarkSweep::_other_refs_stack = NULL;
53 GrowableArray<void*>* MarkSweep::_adjusted_pointers = NULL;
54 bool MarkSweep::_pointer_tracking = false;
55 bool MarkSweep::_root_tracking = true;
56
57 GrowableArray<HeapWord*>* MarkSweep::_cur_gc_live_oops = NULL;
58 GrowableArray<HeapWord*>* MarkSweep::_cur_gc_live_oops_moved_to = NULL;
59 GrowableArray<size_t> * MarkSweep::_cur_gc_live_oops_size = NULL;
60 GrowableArray<HeapWord*>* MarkSweep::_last_gc_live_oops = NULL;
61 GrowableArray<HeapWord*>* MarkSweep::_last_gc_live_oops_moved_to = NULL;
62 GrowableArray<size_t> * MarkSweep::_last_gc_live_oops_size = NULL;
63 #endif
64 44
65 MarkSweep::FollowRootClosure MarkSweep::follow_root_closure; 45 MarkSweep::FollowRootClosure MarkSweep::follow_root_closure;
66 CodeBlobToOopClosure MarkSweep::follow_code_root_closure(&MarkSweep::follow_root_closure, /*do_marking=*/ true); 46 CodeBlobToOopClosure MarkSweep::follow_code_root_closure(&MarkSweep::follow_root_closure, /*do_marking=*/ true);
67 47
68 void MarkSweep::FollowRootClosure::do_oop(oop* p) { follow_root(p); } 48 void MarkSweep::FollowRootClosure::do_oop(oop* p) { follow_root(p); }
183 markOop mark = _preserved_mark_stack.pop(); 163 markOop mark = _preserved_mark_stack.pop();
184 obj->set_mark(mark); 164 obj->set_mark(mark);
185 } 165 }
186 } 166 }
187 167
188 #ifdef VALIDATE_MARK_SWEEP
189
190 void MarkSweep::track_adjusted_pointer(void* p, bool isroot) {
191 if (!ValidateMarkSweep)
192 return;
193
194 if (!isroot) {
195 if (_pointer_tracking) {
196 guarantee(_adjusted_pointers->contains(p), "should have seen this pointer");
197 _adjusted_pointers->remove(p);
198 }
199 } else {
200 ptrdiff_t index = _root_refs_stack->find(p);
201 if (index != -1) {
202 int l = _root_refs_stack->length();
203 if (l > 0 && l - 1 != index) {
204 void* last = _root_refs_stack->pop();
205 assert(last != p, "should be different");
206 _root_refs_stack->at_put(index, last);
207 } else {
208 _root_refs_stack->remove(p);
209 }
210 }
211 }
212 }
213
214 void MarkSweep::check_adjust_pointer(void* p) {
215 _adjusted_pointers->push(p);
216 }
217
218 class AdjusterTracker: public OopClosure {
219 public:
220 AdjusterTracker() {}
221 void do_oop(oop* o) { MarkSweep::check_adjust_pointer(o); }
222 void do_oop(narrowOop* o) { MarkSweep::check_adjust_pointer(o); }
223 };
224
225 void MarkSweep::track_interior_pointers(oop obj) {
226 if (ValidateMarkSweep) {
227 _adjusted_pointers->clear();
228 _pointer_tracking = true;
229
230 AdjusterTracker checker;
231 obj->oop_iterate_no_header(&checker);
232 }
233 }
234
235 void MarkSweep::check_interior_pointers() {
236 if (ValidateMarkSweep) {
237 _pointer_tracking = false;
238 guarantee(_adjusted_pointers->length() == 0, "should have processed the same pointers");
239 }
240 }
241
242 void MarkSweep::reset_live_oop_tracking() {
243 if (ValidateMarkSweep) {
244 guarantee((size_t)_live_oops->length() == _live_oops_index, "should be at end of live oops");
245 _live_oops_index = 0;
246 }
247 }
248
249 void MarkSweep::register_live_oop(oop p, size_t size) {
250 if (ValidateMarkSweep) {
251 _live_oops->push(p);
252 _live_oops_size->push(size);
253 _live_oops_index++;
254 }
255 }
256
257 void MarkSweep::validate_live_oop(oop p, size_t size) {
258 if (ValidateMarkSweep) {
259 oop obj = _live_oops->at((int)_live_oops_index);
260 guarantee(obj == p, "should be the same object");
261 guarantee(_live_oops_size->at((int)_live_oops_index) == size, "should be the same size");
262 _live_oops_index++;
263 }
264 }
265
266 void MarkSweep::live_oop_moved_to(HeapWord* q, size_t size,
267 HeapWord* compaction_top) {
268 assert(oop(q)->forwardee() == NULL || oop(q)->forwardee() == oop(compaction_top),
269 "should be moved to forwarded location");
270 if (ValidateMarkSweep) {
271 MarkSweep::validate_live_oop(oop(q), size);
272 _live_oops_moved_to->push(oop(compaction_top));
273 }
274 if (RecordMarkSweepCompaction) {
275 _cur_gc_live_oops->push(q);
276 _cur_gc_live_oops_moved_to->push(compaction_top);
277 _cur_gc_live_oops_size->push(size);
278 }
279 }
280
281 void MarkSweep::compaction_complete() {
282 if (RecordMarkSweepCompaction) {
283 GrowableArray<HeapWord*>* _tmp_live_oops = _cur_gc_live_oops;
284 GrowableArray<HeapWord*>* _tmp_live_oops_moved_to = _cur_gc_live_oops_moved_to;
285 GrowableArray<size_t> * _tmp_live_oops_size = _cur_gc_live_oops_size;
286
287 _cur_gc_live_oops = _last_gc_live_oops;
288 _cur_gc_live_oops_moved_to = _last_gc_live_oops_moved_to;
289 _cur_gc_live_oops_size = _last_gc_live_oops_size;
290 _last_gc_live_oops = _tmp_live_oops;
291 _last_gc_live_oops_moved_to = _tmp_live_oops_moved_to;
292 _last_gc_live_oops_size = _tmp_live_oops_size;
293 }
294 }
295
296 void MarkSweep::print_new_location_of_heap_address(HeapWord* q) {
297 if (!RecordMarkSweepCompaction) {
298 tty->print_cr("Requires RecordMarkSweepCompaction to be enabled");
299 return;
300 }
301
302 if (_last_gc_live_oops == NULL) {
303 tty->print_cr("No compaction information gathered yet");
304 return;
305 }
306
307 for (int i = 0; i < _last_gc_live_oops->length(); i++) {
308 HeapWord* old_oop = _last_gc_live_oops->at(i);
309 size_t sz = _last_gc_live_oops_size->at(i);
310 if (old_oop <= q && q < (old_oop + sz)) {
311 HeapWord* new_oop = _last_gc_live_oops_moved_to->at(i);
312 size_t offset = (q - old_oop);
313 tty->print_cr("Address " PTR_FORMAT, q);
314 tty->print_cr(" Was in oop " PTR_FORMAT ", size " SIZE_FORMAT ", at offset " SIZE_FORMAT, old_oop, sz, offset);
315 tty->print_cr(" Now in oop " PTR_FORMAT ", actual address " PTR_FORMAT, new_oop, new_oop + offset);
316 return;
317 }
318 }
319
320 tty->print_cr("Address " PTR_FORMAT " not found in live oop information from last GC", q);
321 }
322 #endif //VALIDATE_MARK_SWEEP
323
324 MarkSweep::IsAliveClosure MarkSweep::is_alive; 168 MarkSweep::IsAliveClosure MarkSweep::is_alive;
325 169
326 void MarkSweep::IsAliveClosure::do_object(oop p) { ShouldNotReachHere(); } 170 void MarkSweep::IsAliveClosure::do_object(oop p) { ShouldNotReachHere(); }
327 bool MarkSweep::IsAliveClosure::do_object_b(oop p) { return p->is_gc_marked(); } 171 bool MarkSweep::IsAliveClosure::do_object_b(oop p) { return p->is_gc_marked(); }
328 172

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