Ejemplos de MutableSpace::free_in_words en C++ (Cpp)

Ejemplo n.º 1

Archivo: mutableNUMASpace.cpp Proyecto: campolake/openjdk9

// There may be unallocated holes in the middle chunks
// that should be filled with dead objects to ensure parsability.
void MutableNUMASpace::ensure_parsability() {
  for (int i = 0; i < lgrp_spaces()->length(); i++) {
    LGRPSpace *ls = lgrp_spaces()->at(i);
    MutableSpace *s = ls->space();
    if (s->top() < top()) { // For all spaces preceding the one containing top()
      if (s->free_in_words() > 0) {
        intptr_t cur_top = (intptr_t)s->top();
        size_t words_left_to_fill = pointer_delta(s->end(), s->top());;
        while (words_left_to_fill > 0) {
          size_t words_to_fill = MIN2(words_left_to_fill, CollectedHeap::filler_array_max_size());
          assert(words_to_fill >= CollectedHeap::min_fill_size(),
                 "Remaining size (" SIZE_FORMAT ") is too small to fill (based on " SIZE_FORMAT " and " SIZE_FORMAT ")",
                 words_to_fill, words_left_to_fill, CollectedHeap::filler_array_max_size());
          CollectedHeap::fill_with_object((HeapWord*)cur_top, words_to_fill);
          if (!os::numa_has_static_binding()) {
            size_t touched_words = words_to_fill;
#ifndef ASSERT
            if (!ZapUnusedHeapArea) {
              touched_words = MIN2((size_t)align_object_size(typeArrayOopDesc::header_size(T_INT)),
                touched_words);
            }
#endif
            MemRegion invalid;
            HeapWord *crossing_start = (HeapWord*)round_to(cur_top, os::vm_page_size());
            HeapWord *crossing_end = (HeapWord*)round_to(cur_top + touched_words, os::vm_page_size());
            if (crossing_start != crossing_end) {
              // If object header crossed a small page boundary we mark the area
              // as invalid rounding it to a page_size().
              HeapWord *start = MAX2((HeapWord*)round_down(cur_top, page_size()), s->bottom());
              HeapWord *end = MIN2((HeapWord*)round_to(cur_top + touched_words, page_size()), s->end());
              invalid = MemRegion(start, end);
            }

            ls->add_invalid_region(invalid);
          }
          cur_top = cur_top + (words_to_fill * HeapWordSize);
          words_left_to_fill -= words_to_fill;
        }
      }
    } else {
      if (!os::numa_has_static_binding()) {
#ifdef ASSERT
        MemRegion invalid(s->top(), s->end());
        ls->add_invalid_region(invalid);
#else
        if (ZapUnusedHeapArea) {
          MemRegion invalid(s->top(), s->end());
          ls->add_invalid_region(invalid);
        } else {
          return;
        }
#endif
      } else {
          return;
      }
    }
  }
}

Ejemplo n.º 2

Archivo: mutableNUMASpace.cpp Proyecto: ismo1652/jvmnotebook

// There may be unallocated holes in the middle chunks
// that should be filled with dead objects to ensure parseability.
void MutableNUMASpace::ensure_parsability() {
  for (int i = 0; i < lgrp_spaces()->length(); i++) {
    LGRPSpace *ls = lgrp_spaces()->at(i);
    MutableSpace *s = ls->space();
    if (s->top() < top()) { // For all spaces preceding the one containing top()
      if (s->free_in_words() > 0) {
        size_t area_touched_words = pointer_delta(s->end(), s->top());
        CollectedHeap::fill_with_object(s->top(), area_touched_words);
#ifndef ASSERT
        if (!ZapUnusedHeapArea) {
          area_touched_words = MIN2((size_t)align_object_size(typeArrayOopDesc::header_size(T_INT)),
                                    area_touched_words);
        }
#endif
        if (!os::numa_has_static_binding()) {
          MemRegion invalid;
          HeapWord *crossing_start = (HeapWord*)round_to((intptr_t)s->top(), os::vm_page_size());
          HeapWord *crossing_end = (HeapWord*)round_to((intptr_t)(s->top() + area_touched_words),
                                                       os::vm_page_size());
          if (crossing_start != crossing_end) {
            // If object header crossed a small page boundary we mark the area
            // as invalid rounding it to a page_size().
            HeapWord *start = MAX2((HeapWord*)round_down((intptr_t)s->top(), page_size()), s->bottom());
            HeapWord *end = MIN2((HeapWord*)round_to((intptr_t)(s->top() + area_touched_words), page_size()),
                                 s->end());
            invalid = MemRegion(start, end);
          }

          ls->add_invalid_region(invalid);
        }
      }
    } else {
      if (!os::numa_has_static_binding()) {
#ifdef ASSERT
        MemRegion invalid(s->top(), s->end());
        ls->add_invalid_region(invalid);
#else
        if (ZapUnusedHeapArea) {
          MemRegion invalid(s->top(), s->end());
          ls->add_invalid_region(invalid);
        } else {
          return;
        }
#endif
      } else {
          return;
      }
    }
  }
}