168 HeapWord* end_addr = MIN2(endWord(), mr.end());
169
170 if (end_addr > start_addr) {
171 // Right-open interval [start-offset, end-offset).
172 BitMap::idx_t start_offset = heapWordToOffset(start_addr);
173 BitMap::idx_t end_offset = heapWordToOffset(end_addr);
174
175 start_offset = _bm.get_next_one_offset(start_offset, end_offset);
176 while (start_offset < end_offset) {
177 if (!cl->do_bit(start_offset)) {
178 return false;
179 }
180 HeapWord* next_addr = MIN2(nextObject(offsetToHeapWord(start_offset)), end_addr);
181 BitMap::idx_t next_offset = heapWordToOffset(next_addr);
182 start_offset = _bm.get_next_one_offset(next_offset, end_offset);
183 }
184 }
185 return true;
186 }
187
188 #define check_mark(addr) \
189 assert(_bmStartWord <= (addr) && (addr) < (_bmStartWord + _bmWordSize), \
190 "outside underlying space?"); \
191 assert(G1CollectedHeap::heap()->is_in_exact(addr), \
192 "Trying to access not available bitmap " PTR_FORMAT \
193 " corresponding to " PTR_FORMAT " (%u)", \
194 p2i(this), p2i(addr), G1CollectedHeap::heap()->addr_to_region(addr));
195
196 inline void CMBitMap::mark(HeapWord* addr) {
197 check_mark(addr);
198 _bm.set_bit(heapWordToOffset(addr));
199 }
200
201 inline void CMBitMap::clear(HeapWord* addr) {
202 check_mark(addr);
203 _bm.clear_bit(heapWordToOffset(addr));
204 }
205
206 inline bool CMBitMap::parMark(HeapWord* addr) {
207 check_mark(addr);
334 assert(obj->is_oop_or_null(true /* ignore mark word */), "Expected an oop or NULL at " PTR_FORMAT, p2i(obj));
335 if (_g1h->is_in_g1_reserved(objAddr)) {
336 assert(obj != NULL, "null check is implicit");
337 if (!_nextMarkBitMap->isMarked(objAddr)) {
338 // Only get the containing region if the object is not marked on the
339 // bitmap (otherwise, it's a waste of time since we won't do
340 // anything with it).
341 HeapRegion* hr = _g1h->heap_region_containing(obj);
342 if (!hr->obj_allocated_since_next_marking(obj)) {
343 make_reference_grey(obj, hr);
344 }
345 }
346 }
347 }
348
349 inline void ConcurrentMark::markPrev(oop p) {
350 assert(!_prevMarkBitMap->isMarked((HeapWord*) p), "sanity");
351 // Note we are overriding the read-only view of the prev map here, via
352 // the cast.
353 ((CMBitMap*)_prevMarkBitMap)->mark((HeapWord*) p);
354 }
355
356 inline void ConcurrentMark::grayRoot(oop obj, size_t word_size,
357 uint worker_id, HeapRegion* hr) {
358 assert(obj != NULL, "pre-condition");
359 HeapWord* addr = (HeapWord*) obj;
360 if (hr == NULL) {
361 hr = _g1h->heap_region_containing(addr);
362 } else {
363 assert(hr->is_in(addr), "pre-condition");
364 }
365 assert(hr != NULL, "sanity");
366 // Given that we're looking for a region that contains an object
367 // header it's impossible to get back a HC region.
368 assert(!hr->is_continues_humongous(), "sanity");
369
370 if (addr < hr->next_top_at_mark_start()) {
371 if (!_nextMarkBitMap->isMarked(addr)) {
372 par_mark_and_count(obj, word_size, hr, worker_id);
373 }
|
168 HeapWord* end_addr = MIN2(endWord(), mr.end());
169
170 if (end_addr > start_addr) {
171 // Right-open interval [start-offset, end-offset).
172 BitMap::idx_t start_offset = heapWordToOffset(start_addr);
173 BitMap::idx_t end_offset = heapWordToOffset(end_addr);
174
175 start_offset = _bm.get_next_one_offset(start_offset, end_offset);
176 while (start_offset < end_offset) {
177 if (!cl->do_bit(start_offset)) {
178 return false;
179 }
180 HeapWord* next_addr = MIN2(nextObject(offsetToHeapWord(start_offset)), end_addr);
181 BitMap::idx_t next_offset = heapWordToOffset(next_addr);
182 start_offset = _bm.get_next_one_offset(next_offset, end_offset);
183 }
184 }
185 return true;
186 }
187
188 // The argument addr should be the start address of a valid object
189 HeapWord* CMBitMapRO::nextObject(HeapWord* addr) {
190 oop obj = (oop) addr;
191 HeapWord* res = addr + obj->size();
192 assert(offsetToHeapWord(heapWordToOffset(res)) == res, "sanity");
193 return res;
194 }
195
196 #define check_mark(addr) \
197 assert(_bmStartWord <= (addr) && (addr) < (_bmStartWord + _bmWordSize), \
198 "outside underlying space?"); \
199 assert(G1CollectedHeap::heap()->is_in_exact(addr), \
200 "Trying to access not available bitmap " PTR_FORMAT \
201 " corresponding to " PTR_FORMAT " (%u)", \
202 p2i(this), p2i(addr), G1CollectedHeap::heap()->addr_to_region(addr));
203
204 inline void CMBitMap::mark(HeapWord* addr) {
205 check_mark(addr);
206 _bm.set_bit(heapWordToOffset(addr));
207 }
208
209 inline void CMBitMap::clear(HeapWord* addr) {
210 check_mark(addr);
211 _bm.clear_bit(heapWordToOffset(addr));
212 }
213
214 inline bool CMBitMap::parMark(HeapWord* addr) {
215 check_mark(addr);
342 assert(obj->is_oop_or_null(true /* ignore mark word */), "Expected an oop or NULL at " PTR_FORMAT, p2i(obj));
343 if (_g1h->is_in_g1_reserved(objAddr)) {
344 assert(obj != NULL, "null check is implicit");
345 if (!_nextMarkBitMap->isMarked(objAddr)) {
346 // Only get the containing region if the object is not marked on the
347 // bitmap (otherwise, it's a waste of time since we won't do
348 // anything with it).
349 HeapRegion* hr = _g1h->heap_region_containing(obj);
350 if (!hr->obj_allocated_since_next_marking(obj)) {
351 make_reference_grey(obj, hr);
352 }
353 }
354 }
355 }
356
357 inline void ConcurrentMark::markPrev(oop p) {
358 assert(!_prevMarkBitMap->isMarked((HeapWord*) p), "sanity");
359 // Note we are overriding the read-only view of the prev map here, via
360 // the cast.
361 ((CMBitMap*)_prevMarkBitMap)->mark((HeapWord*) p);
362 }
363
364 bool ConcurrentMark::isPrevMarked(oop p) const {
365 assert(p != NULL && p->is_oop(), "expected an oop");
366 HeapWord* addr = (HeapWord*)p;
367 assert(addr >= _prevMarkBitMap->startWord() ||
368 addr < _prevMarkBitMap->endWord(), "in a region");
369
370 return _prevMarkBitMap->isMarked(addr);
371 }
372
373 inline void ConcurrentMark::grayRoot(oop obj, size_t word_size,
374 uint worker_id, HeapRegion* hr) {
375 assert(obj != NULL, "pre-condition");
376 HeapWord* addr = (HeapWord*) obj;
377 if (hr == NULL) {
378 hr = _g1h->heap_region_containing(addr);
379 } else {
380 assert(hr->is_in(addr), "pre-condition");
381 }
382 assert(hr != NULL, "sanity");
383 // Given that we're looking for a region that contains an object
384 // header it's impossible to get back a HC region.
385 assert(!hr->is_continues_humongous(), "sanity");
386
387 if (addr < hr->next_top_at_mark_start()) {
388 if (!_nextMarkBitMap->isMarked(addr)) {
389 par_mark_and_count(obj, word_size, hr, worker_id);
390 }
|