286 }
287
288 void PSMarkSweepDecorator::adjust_pointers() {
289 // adjust all the interior pointers to point at the new locations of objects
290 // Used by MarkSweep::mark_sweep_phase3()
291
292 HeapWord* q = space()->bottom();
293 HeapWord* t = _end_of_live; // Established by "prepare_for_compaction".
294
295 assert(_first_dead <= _end_of_live, "Stands to reason, no?");
296
297 if (q < t && _first_dead > q &&
298 !oop(q)->is_gc_marked()) {
299 // we have a chunk of the space which hasn't moved and we've
300 // reinitialized the mark word during the previous pass, so we can't
301 // use is_gc_marked for the traversal.
302 HeapWord* end = _first_dead;
303
304 while (q < end) {
305 // point all the oops to the new location
306 size_t size = oop(q)->adjust_pointers();
307 q += size;
308 }
309
310 if (_first_dead == t) {
311 q = t;
312 } else {
313 // $$$ This is funky. Using this to read the previously written
314 // LiveRange. See also use below.
315 q = (HeapWord*)oop(_first_dead)->mark()->decode_pointer();
316 }
317 }
318 const intx interval = PrefetchScanIntervalInBytes;
319
320 debug_only(HeapWord* prev_q = NULL);
321 while (q < t) {
322 // prefetch beyond q
323 Prefetch::write(q, interval);
324 if (oop(q)->is_gc_marked()) {
325 // q is alive
326 // point all the oops to the new location
327 size_t size = oop(q)->adjust_pointers();
328 debug_only(prev_q = q);
329 q += size;
330 } else {
331 // q is not a live object, so its mark should point at the next
332 // live object
333 debug_only(prev_q = q);
334 q = (HeapWord*) oop(q)->mark()->decode_pointer();
335 assert(q > prev_q, "we should be moving forward through memory");
336 }
337 }
338
339 assert(q == t, "just checking");
340 }
341
342 void PSMarkSweepDecorator::compact(bool mangle_free_space ) {
343 // Copy all live objects to their new location
344 // Used by MarkSweep::mark_sweep_phase4()
345
346 HeapWord* q = space()->bottom();
347 HeapWord* const t = _end_of_live;
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286 }
287
288 void PSMarkSweepDecorator::adjust_pointers() {
289 // adjust all the interior pointers to point at the new locations of objects
290 // Used by MarkSweep::mark_sweep_phase3()
291
292 HeapWord* q = space()->bottom();
293 HeapWord* t = _end_of_live; // Established by "prepare_for_compaction".
294
295 assert(_first_dead <= _end_of_live, "Stands to reason, no?");
296
297 if (q < t && _first_dead > q &&
298 !oop(q)->is_gc_marked()) {
299 // we have a chunk of the space which hasn't moved and we've
300 // reinitialized the mark word during the previous pass, so we can't
301 // use is_gc_marked for the traversal.
302 HeapWord* end = _first_dead;
303
304 while (q < end) {
305 // point all the oops to the new location
306 size_t size = MarkSweep::adjust_pointers(oop(q));
307 q += size;
308 }
309
310 if (_first_dead == t) {
311 q = t;
312 } else {
313 // $$$ This is funky. Using this to read the previously written
314 // LiveRange. See also use below.
315 q = (HeapWord*)oop(_first_dead)->mark()->decode_pointer();
316 }
317 }
318 const intx interval = PrefetchScanIntervalInBytes;
319
320 debug_only(HeapWord* prev_q = NULL);
321 while (q < t) {
322 // prefetch beyond q
323 Prefetch::write(q, interval);
324 if (oop(q)->is_gc_marked()) {
325 // q is alive
326 // point all the oops to the new location
327 size_t size = MarkSweep::adjust_pointers(oop(q));
328 debug_only(prev_q = q);
329 q += size;
330 } else {
331 // q is not a live object, so its mark should point at the next
332 // live object
333 debug_only(prev_q = q);
334 q = (HeapWord*) oop(q)->mark()->decode_pointer();
335 assert(q > prev_q, "we should be moving forward through memory");
336 }
337 }
338
339 assert(q == t, "just checking");
340 }
341
342 void PSMarkSweepDecorator::compact(bool mangle_free_space ) {
343 // Copy all live objects to their new location
344 // Used by MarkSweep::mark_sweep_phase4()
345
346 HeapWord* q = space()->bottom();
347 HeapWord* const t = _end_of_live;
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