src/share/vm/compiler/oopMap.hpp

*** 1,7 ****
  /*
!  * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 1998, 2015, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 182,191 ****
--- 182,193 ----
  
    int heap_size() const;
    void copy_data_to(address addr) const;
    OopMap* deep_copy();
  
+   bool has_derived_pointer() const PRODUCT_RETURN0;
+ 
    bool legal_vm_reg_name(VMReg local) {
       return OopMapValue::legal_vm_reg_name(local);
    }
  
    // Printing
*** 348,364 ****
  #ifdef ASSERT
    int stream_position() const           { return _stream->position(); }
  #endif
  };
  
  
  // Derived pointer support. This table keeps track of all derived points on a
  // stack.  It is cleared before each scavenge/GC.  During the traversal of all
  // oops, it is filled in with references to all locations that contains a
  // derived oop (assumed to be very few).  When the GC is complete, the derived
  // pointers are updated based on their base pointers new value and an offset.
! #ifdef COMPILER2
  class DerivedPointerTable : public AllStatic {
    friend class VMStructs;
   private:
     static GrowableArray<DerivedPointerEntry*>* _list;
     static bool _active;                      // do not record pointers for verify pass etc.
--- 350,435 ----
  #ifdef ASSERT
    int stream_position() const           { return _stream->position(); }
  #endif
  };
  
+ class ImmutableOopMapBuilder {
+ private:
+   class Mapping;
+ 
+ private:
+   const OopMapSet* _set;
+   const OopMap* _empty;
+   const OopMap* _last;
+   int _empty_offset;
+   int _last_offset;
+   int _offset;
+   int _required;
+   Mapping* _mapping;
+   ImmutableOopMapSet* _new_set;
+ 
+   /* Used for bookkeeping when building ImmutableOopMaps */
+   class Mapping : public ResourceObj {
+   public:
+     enum kind_t { OOPMAP_UNKNOWN = 0, OOPMAP_NEW = 1, OOPMAP_EMPTY = 2, OOPMAP_DUPLICATE = 3 };
+ 
+     kind_t _kind;
+     int _offset;
+     int _size;
+     const OopMap* _map;
+     const OopMap* _other;
+ 
+     Mapping() : _kind(OOPMAP_UNKNOWN), _offset(-1), _size(-1), _map(NULL) {}
+ 
+     void set(kind_t kind, int offset, int size, const OopMap* map = 0, const OopMap* other = 0) {
+       _kind = kind;
+       _offset = offset;
+       _size = size;
+       _map = map;
+       _other = other;
+     }
+   };
+ 
+ public:
+   ImmutableOopMapBuilder(const OopMapSet* set);
+ 
+   int heap_size();
+   ImmutableOopMapSet* build();
+   ImmutableOopMapSet* generate_into(address buffer);
+ private:
+   bool is_empty(const OopMap* map) const {
+     return map->count() == 0;
+   }
+ 
+   bool is_last_duplicate(const OopMap* map) {
+     if (_last != NULL && _last->count() > 0 && _last->equals(map)) {
+       return true;
+     }
+     return false;
+   }
+ 
+ #ifdef ASSERT
+   void verify(address buffer, int size, const ImmutableOopMapSet* set);
+ #endif
+ 
+   bool has_empty() const {
+     return _empty_offset != -1;
+   }
+ 
+   int size_for(const OopMap* map) const;
+   void fill_pair(ImmutableOopMapPair* pair, const OopMap* map, int offset, const ImmutableOopMapSet* set);
+   int fill_map(ImmutableOopMapPair* pair, const OopMap* map, int offset, const ImmutableOopMapSet* set);
+   void fill(ImmutableOopMapSet* set, int size);
+ };
+ 
  
  // Derived pointer support. This table keeps track of all derived points on a
  // stack.  It is cleared before each scavenge/GC.  During the traversal of all
  // oops, it is filled in with references to all locations that contains a
  // derived oop (assumed to be very few).  When the GC is complete, the derived
  // pointers are updated based on their base pointers new value and an offset.
! #if defined(COMPILER2) || INCLUDE_JVMCI
  class DerivedPointerTable : public AllStatic {
    friend class VMStructs;
   private:
     static GrowableArray<DerivedPointerEntry*>* _list;
     static bool _active;                      // do not record pointers for verify pass etc.
*** 390,397 ****
      if (_active) {
        DerivedPointerTable::set_active(true);
      }
    }
  };
! #endif // COMPILER2
  
  #endif // SHARE_VM_COMPILER_OOPMAP_HPP
--- 461,468 ----
      if (_active) {
        DerivedPointerTable::set_active(true);
      }
    }
  };
! #endif // COMPILER2 || INCLUDE_JVMCI
  
  #endif // SHARE_VM_COMPILER_OOPMAP_HPP