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src/share/vm/memory/heap.hpp

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rev 13198 : 8183573: Refactor CodeHeap and AOTCodeHeap to devirtualize hot methods
Reviewed-by: rbackman


 132   HeapBlock* first_block() const;
 133   HeapBlock* next_block(HeapBlock* b) const;
 134   HeapBlock* block_start(void* p) const;
 135 
 136   // to perform additional actions on creation of executable code
 137   void on_code_mapping(char* base, size_t size);
 138   void clear();                                 // clears all heap contents
 139 
 140  public:
 141   CodeHeap(const char* name, const int code_blob_type);
 142 
 143   // Heap extents
 144   bool  reserve(ReservedSpace rs, size_t committed_size, size_t segment_size);
 145   bool  expand_by(size_t size);                  // expands committed memory by size
 146 
 147   // Memory allocation
 148   void* allocate (size_t size); // Allocate 'size' bytes in the code cache or return NULL
 149   void  deallocate(void* p);    // Deallocate memory
 150 
 151   // Attributes
 152   char* low_boundary() const                     { return _memory.low_boundary (); }
 153   char* high() const                             { return _memory.high(); }
 154   char* high_boundary() const                    { return _memory.high_boundary(); }
 155 
 156   virtual bool contains(const void* p) const     { return low_boundary() <= p && p < high(); }
 157   virtual bool contains_blob(const CodeBlob* blob) const { return low_boundary() <= (char*) blob && (char*) blob < high(); }
 158 
 159   virtual void* find_start(void* p)     const;   // returns the block containing p or NULL
 160   virtual CodeBlob* find_blob_unsafe(void* start) const;
 161   size_t alignment_unit()       const;           // alignment of any block
 162   size_t alignment_offset()     const;           // offset of first byte of any block, within the enclosing alignment unit
 163   static size_t header_size();                   // returns the header size for each heap block
 164 
 165   size_t allocated_in_freelist() const           { return _freelist_segments * CodeCacheSegmentSize; }
 166   int    freelist_length()       const           { return _freelist_length; } // number of elements in the freelist
 167 
 168   // returns the first block or NULL
 169   virtual void* first() const                    { return next_used(first_block()); }
 170   // returns the next block given a block p or NULL
 171   virtual void* next(void* p) const              { return next_used(next_block(block_start(p))); }
 172 
 173   // Statistics
 174   size_t capacity() const;
 175   size_t max_capacity() const;
 176   int    allocated_segments() const;
 177   size_t allocated_capacity() const;




 132   HeapBlock* first_block() const;
 133   HeapBlock* next_block(HeapBlock* b) const;
 134   HeapBlock* block_start(void* p) const;
 135 
 136   // to perform additional actions on creation of executable code
 137   void on_code_mapping(char* base, size_t size);
 138   void clear();                                 // clears all heap contents
 139 
 140  public:
 141   CodeHeap(const char* name, const int code_blob_type);
 142 
 143   // Heap extents
 144   bool  reserve(ReservedSpace rs, size_t committed_size, size_t segment_size);
 145   bool  expand_by(size_t size);                  // expands committed memory by size
 146 
 147   // Memory allocation
 148   void* allocate (size_t size); // Allocate 'size' bytes in the code cache or return NULL
 149   void  deallocate(void* p);    // Deallocate memory
 150 
 151   // Attributes
 152   char* low_boundary() const                     { return _memory.low_boundary(); }
 153   char* high() const                             { return _memory.high(); }
 154   char* high_boundary() const                    { return _memory.high_boundary(); }
 155 
 156   bool contains(const void* p) const             { return low_boundary() <= p && p < high(); }
 157   bool contains_blob(const CodeBlob* blob) const { return contains(blob->code_begin()); }
 158 
 159   virtual void* find_start(void* p)     const;   // returns the block containing p or NULL
 160   virtual CodeBlob* find_blob_unsafe(void* start) const;
 161   size_t alignment_unit()       const;           // alignment of any block
 162   size_t alignment_offset()     const;           // offset of first byte of any block, within the enclosing alignment unit
 163   static size_t header_size();                   // returns the header size for each heap block
 164 
 165   size_t allocated_in_freelist() const           { return _freelist_segments * CodeCacheSegmentSize; }
 166   int    freelist_length()       const           { return _freelist_length; } // number of elements in the freelist
 167 
 168   // returns the first block or NULL
 169   virtual void* first() const                    { return next_used(first_block()); }
 170   // returns the next block given a block p or NULL
 171   virtual void* next(void* p) const              { return next_used(next_block(block_start(p))); }
 172 
 173   // Statistics
 174   size_t capacity() const;
 175   size_t max_capacity() const;
 176   int    allocated_segments() const;
 177   size_t allocated_capacity() const;


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