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