304 "Allocation buffer index out-of-bounds: " CSETSTATE_FORMAT, dest.value());
305 assert(_alloc_buffers[dest.value()] != NULL,
306 "Allocation buffer is NULL: " CSETSTATE_FORMAT, dest.value());
307 return _alloc_buffers[dest.value()];
308 }
309
310 virtual void flush_and_retire_stats();
311
312 virtual void waste(size_t& wasted, size_t& undo_wasted);
313 };
314
315 // G1ArchiveRegionMap is a boolean array used to mark G1 regions as
316 // archive regions. This allows a quick check for whether an object
317 // should not be marked because it is in an archive region.
318 class G1ArchiveRegionMap : public G1BiasedMappedArray<bool> {
319 protected:
320 bool default_value() const { return false; }
321 };
322
323 // G1ArchiveAllocator is used to allocate memory in archive
324 // regions. Such regions are not modifiable by GC, being neither
325 // scavenged nor compacted, or even marked in the object header.
326 // They can contain no pointers to non-archive heap regions,
327 class G1ArchiveAllocator : public CHeapObj<mtGC> {
328 protected:
329 bool _open; // An 'open' archive region may contain references pointing to
330 // non-archive heap region. GC can adjust pointers in 'open'
331 // archive region.
332 G1CollectedHeap* _g1h;
333
334 // The current allocation region
335 HeapRegion* _allocation_region;
336
337 // Regions allocated for the current archive range.
338 GrowableArray<HeapRegion*> _allocated_regions;
339
340 // The number of bytes used in the current range.
341 size_t _summary_bytes_used;
342
343 // Current allocation window within the current region.
344 HeapWord* _bottom;
345 HeapWord* _top;
346 HeapWord* _max;
347
348 // Allocate a new region for this archive allocator.
349 // Allocation is from the top of the reserved heap downward.
350 bool alloc_new_region();
351
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304 "Allocation buffer index out-of-bounds: " CSETSTATE_FORMAT, dest.value());
305 assert(_alloc_buffers[dest.value()] != NULL,
306 "Allocation buffer is NULL: " CSETSTATE_FORMAT, dest.value());
307 return _alloc_buffers[dest.value()];
308 }
309
310 virtual void flush_and_retire_stats();
311
312 virtual void waste(size_t& wasted, size_t& undo_wasted);
313 };
314
315 // G1ArchiveRegionMap is a boolean array used to mark G1 regions as
316 // archive regions. This allows a quick check for whether an object
317 // should not be marked because it is in an archive region.
318 class G1ArchiveRegionMap : public G1BiasedMappedArray<bool> {
319 protected:
320 bool default_value() const { return false; }
321 };
322
323 // G1ArchiveAllocator is used to allocate memory in archive
324 // regions. Such regions are not scavenged nor compacted by GC.
325 // There are two types of archive regions, which are
326 // differ in the kind of references allowed for the contained objects:
327 //
328 // - 'Closed' archive region contain no references outside of archive
329 // regions. The region is immutable by GC. GC does not mark object
330 // header in 'closed' archive region.
331 // - An 'open' archive region may contain references pointing to
332 // non-archive heap region. GC can adjust pointers and mark object
333 // header in 'open' archive region.
334 class G1ArchiveAllocator : public CHeapObj<mtGC> {
335 protected:
336 bool _open; // Indicate if the region is 'open' archive.
337 G1CollectedHeap* _g1h;
338
339 // The current allocation region
340 HeapRegion* _allocation_region;
341
342 // Regions allocated for the current archive range.
343 GrowableArray<HeapRegion*> _allocated_regions;
344
345 // The number of bytes used in the current range.
346 size_t _summary_bytes_used;
347
348 // Current allocation window within the current region.
349 HeapWord* _bottom;
350 HeapWord* _top;
351 HeapWord* _max;
352
353 // Allocate a new region for this archive allocator.
354 // Allocation is from the top of the reserved heap downward.
355 bool alloc_new_region();
356
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