< prev index next >
src/hotspot/share/memory/metaspace/metachunk.hpp
Print this page
rev 50187 : imported patch metaspace-split
*** 22,82 ****
*
*/
#ifndef SHARE_VM_MEMORY_METACHUNK_HPP
#define SHARE_VM_MEMORY_METACHUNK_HPP
#include "utilities/debug.hpp"
#include "utilities/globalDefinitions.hpp"
! class VirtualSpaceNode;
!
! // Super class of Metablock and Metachunk to allow them to
! // be put on the FreeList and in the BinaryTreeDictionary.
! template <class T>
! class Metabase {
! size_t _word_size;
! T* _next;
! T* _prev;
!
! protected:
! Metabase(size_t word_size) : _word_size(word_size), _next(NULL), _prev(NULL) {}
!
! public:
! T* next() const { return _next; }
! T* prev() const { return _prev; }
! void set_next(T* v) { _next = v; assert(v != this, "Boom");}
! void set_prev(T* v) { _prev = v; assert(v != this, "Boom");}
! void clear_next() { set_next(NULL); }
! void clear_prev() { set_prev(NULL); }
!
! size_t size() const volatile { return _word_size; }
! void set_size(size_t v) { _word_size = v; }
!
! void link_next(T* ptr) { set_next(ptr); }
! void link_prev(T* ptr) { set_prev(ptr); }
! void link_after(T* ptr) {
! link_next(ptr);
! if (ptr != NULL) ptr->link_prev((T*)this);
! }
!
! uintptr_t* end() const { return ((uintptr_t*) this) + size(); }
!
! bool cantCoalesce() const { return false; }
!
! // Debug support
! #ifdef ASSERT
! void* prev_addr() const { return (void*)&_prev; }
! void* next_addr() const { return (void*)&_next; }
! void* size_addr() const { return (void*)&_word_size; }
! #endif
! bool verify_chunk_in_free_list(T* tc) const { return true; }
! bool verify_par_locked() { return true; }
! void assert_is_mangled() const {/* Don't check "\*/}
! bool is_free() { return true; }
! };
// Metachunk - Quantum of allocation from a Virtualspace
// Metachunks are reused (when freed are put on a global freelist) and
// have no permanent association to a SpaceManager.
--- 22,41 ----
*
*/
#ifndef SHARE_VM_MEMORY_METACHUNK_HPP
#define SHARE_VM_MEMORY_METACHUNK_HPP
+ #include "memory/metaspace/metabase.hpp"
+ #include "memory/metaspace/metaspaceCommon.hpp"
#include "utilities/debug.hpp"
#include "utilities/globalDefinitions.hpp"
! class MetachunkTest;
! namespace metaspace {
! class VirtualSpaceNode;
// Metachunk - Quantum of allocation from a Virtualspace
// Metachunks are reused (when freed are put on a global freelist) and
// have no permanent association to a SpaceManager.
*** 91,133 ****
// | | | used |
// | | | |
// | | | |
// +--------------+ <- bottom --+ --+
- // ChunkIndex defines the type of chunk.
- // Chunk types differ by size: specialized < small < medium, chunks
- // larger than medium are humongous chunks of varying size.
- enum ChunkIndex {
- ZeroIndex = 0,
- SpecializedIndex = ZeroIndex,
- SmallIndex = SpecializedIndex + 1,
- MediumIndex = SmallIndex + 1,
- HumongousIndex = MediumIndex + 1,
- NumberOfFreeLists = 3,
- NumberOfInUseLists = 4
- };
-
- // Utility functions.
- size_t get_size_for_nonhumongous_chunktype(ChunkIndex chunk_type, bool is_class);
- ChunkIndex get_chunk_type_by_size(size_t size, bool is_class);
-
- ChunkIndex next_chunk_index(ChunkIndex i);
- ChunkIndex prev_chunk_index(ChunkIndex i);
-
- // Returns a descriptive name for a chunk type.
- const char* chunk_size_name(ChunkIndex index);
-
- // Verify chunk type.
- inline bool is_valid_chunktype(ChunkIndex index) {
- return index == SpecializedIndex || index == SmallIndex ||
- index == MediumIndex || index == HumongousIndex;
- }
-
- inline bool is_valid_nonhumongous_chunktype(ChunkIndex index) {
- return is_valid_chunktype(index) && index != HumongousIndex;
- }
-
enum ChunkOrigin {
// Chunk normally born (via take_from_committed)
origin_normal = 1,
// Chunk was born as padding chunk
origin_pad = 2,
--- 50,59 ----
*** 150,160 ****
origin == origin_merge ||
origin == origin_split;
}
class Metachunk : public Metabase<Metachunk> {
! friend class MetachunkTest;
// The VirtualSpaceNode containing this chunk.
VirtualSpaceNode* const _container;
// Current allocation top.
MetaWord* _top;
--- 76,88 ----
origin == origin_merge ||
origin == origin_split;
}
class Metachunk : public Metabase<Metachunk> {
!
! friend class ::MetachunkTest;
!
// The VirtualSpaceNode containing this chunk.
VirtualSpaceNode* const _container;
// Current allocation top.
MetaWord* _top;
*** 230,250 ****
DEBUG_ONLY(void mangle(juint word_value);)
DEBUG_ONLY(void verify() const;)
};
- // Metablock is the unit of allocation from a Chunk.
- //
- // A Metablock may be reused by its SpaceManager but are never moved between
- // SpaceManagers. There is no explicit link to the Metachunk
- // from which it was allocated. Metablock may be deallocated and
- // put on a freelist but the space is never freed, rather
- // the Metachunk it is a part of will be deallocated when it's
- // associated class loader is collected.
! class Metablock : public Metabase<Metablock> {
! friend class VMStructs;
! public:
! Metablock(size_t word_size) : Metabase<Metablock>(word_size) {}
! };
#endif // SHARE_VM_MEMORY_METACHUNK_HPP
--- 158,173 ----
DEBUG_ONLY(void mangle(juint word_value);)
DEBUG_ONLY(void verify() const;)
};
! // Helper function that does a bunch of checks for a chunk.
! DEBUG_ONLY(void do_verify_chunk(Metachunk* chunk);)
!
! // Given a Metachunk, update its in-use information (both in the
! // chunk and the occupancy map).
! void do_update_in_use_info_for_chunk(Metachunk* chunk, bool inuse);
!
! } // namespace metaspace
#endif // SHARE_VM_MEMORY_METACHUNK_HPP
< prev index next >