270 } else if (to > sp_top) {
271 to = sp_top;
272 }
273
274 // we know which cards to scan, now clear them
275 if (first_unclean_card <= worker_start_card+1)
276 first_unclean_card = worker_start_card+1;
277 if (following_clean_card >= worker_end_card-1)
278 following_clean_card = worker_end_card-1;
279
280 while (first_unclean_card < following_clean_card) {
281 *first_unclean_card++ = clean_card;
282 }
283
284 const int interval = PrefetchScanIntervalInBytes;
285 // scan all objects in the range
286 if (interval != 0) {
287 while (p < to) {
288 Prefetch::write(p, interval);
289 oop m = oop(p);
290 assert(m->is_oop_or_null(), "Expected an oop or NULL for header field at " PTR_FORMAT, p2i(m));
291 pm->push_contents(m);
292 p += m->size();
293 }
294 pm->drain_stacks_cond_depth();
295 } else {
296 while (p < to) {
297 oop m = oop(p);
298 assert(m->is_oop_or_null(), "Expected an oop or NULL for header field at " PTR_FORMAT, p2i(m));
299 pm->push_contents(m);
300 p += m->size();
301 }
302 pm->drain_stacks_cond_depth();
303 }
304 last_scanned = p;
305 }
306 // "current_card" is still the "following_clean_card" or
307 // the current_card is >= the worker_end_card so the
308 // loop will not execute again.
309 assert((current_card == following_clean_card) ||
310 (current_card >= worker_end_card),
311 "current_card should only be incremented if it still equals "
312 "following_clean_card");
313 // Increment current_card so that it is not processed again.
314 // It may now be dirty because a old-to-young pointer was
315 // found on it an updated. If it is now dirty, it cannot be
316 // be safely cleaned in the next iteration.
317 current_card++;
318 }
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270 } else if (to > sp_top) {
271 to = sp_top;
272 }
273
274 // we know which cards to scan, now clear them
275 if (first_unclean_card <= worker_start_card+1)
276 first_unclean_card = worker_start_card+1;
277 if (following_clean_card >= worker_end_card-1)
278 following_clean_card = worker_end_card-1;
279
280 while (first_unclean_card < following_clean_card) {
281 *first_unclean_card++ = clean_card;
282 }
283
284 const int interval = PrefetchScanIntervalInBytes;
285 // scan all objects in the range
286 if (interval != 0) {
287 while (p < to) {
288 Prefetch::write(p, interval);
289 oop m = oop(p);
290 assert(oopDesc::is_oop_or_null(m), "Expected an oop or NULL for header field at " PTR_FORMAT, p2i(m));
291 pm->push_contents(m);
292 p += m->size();
293 }
294 pm->drain_stacks_cond_depth();
295 } else {
296 while (p < to) {
297 oop m = oop(p);
298 assert(oopDesc::is_oop_or_null(m), "Expected an oop or NULL for header field at " PTR_FORMAT, p2i(m));
299 pm->push_contents(m);
300 p += m->size();
301 }
302 pm->drain_stacks_cond_depth();
303 }
304 last_scanned = p;
305 }
306 // "current_card" is still the "following_clean_card" or
307 // the current_card is >= the worker_end_card so the
308 // loop will not execute again.
309 assert((current_card == following_clean_card) ||
310 (current_card >= worker_end_card),
311 "current_card should only be incremented if it still equals "
312 "following_clean_card");
313 // Increment current_card so that it is not processed again.
314 // It may now be dirty because a old-to-young pointer was
315 // found on it an updated. If it is now dirty, it cannot be
316 // be safely cleaned in the next iteration.
317 current_card++;
318 }
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