duke@435: /*
brutisso@3711:  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #ifndef SHARE_VM_MEMORY_UNIVERSE_HPP
stefank@2314: #define SHARE_VM_MEMORY_UNIVERSE_HPP
stefank@2314: 
stefank@2314: #include "runtime/handles.hpp"
stefank@2314: #include "utilities/growableArray.hpp"
stefank@2314: 
duke@435: // Universe is a name space holding known system classes and objects in the VM.
duke@435: //
duke@435: // Loaded classes are accessible through the SystemDictionary.
duke@435: //
duke@435: // The object heap is allocated and accessed through Universe, and various allocation
duke@435: // support is provided. Allocation by the interpreter and compiled code is done inline
duke@435: // and bails out to Scavenge::invoke_and_allocate.
duke@435: 
duke@435: class CollectedHeap;
duke@435: class DeferredObjAllocEvent;
duke@435: 
duke@435: 
duke@435: // Common parts of a methodOop cache. This cache safely interacts with
duke@435: // the RedefineClasses API.
duke@435: //
duke@435: class CommonMethodOopCache : public CHeapObj {
duke@435:   // We save the klassOop and the idnum of methodOop in order to get
duke@435:   // the current cached methodOop.
duke@435:  private:
duke@435:   klassOop              _klass;
duke@435:   int                   _method_idnum;
duke@435: 
duke@435:  public:
duke@435:   CommonMethodOopCache()   { _klass = NULL; _method_idnum = -1; }
duke@435:   ~CommonMethodOopCache()  { _klass = NULL; _method_idnum = -1; }
duke@435: 
duke@435:   void     init(klassOop k, methodOop m, TRAPS);
duke@435:   klassOop klass() const         { return _klass; }
duke@435:   int      method_idnum() const  { return _method_idnum; }
duke@435: 
duke@435:   // GC support
duke@435:   void     oops_do(OopClosure* f)  { f->do_oop((oop*)&_klass); }
duke@435: };
duke@435: 
duke@435: 
duke@435: // A helper class for caching a methodOop when the user of the cache
duke@435: // cares about all versions of the methodOop.
duke@435: //
duke@435: class ActiveMethodOopsCache : public CommonMethodOopCache {
duke@435:   // This subclass adds weak references to older versions of the
duke@435:   // methodOop and a query method for a methodOop.
duke@435: 
duke@435:  private:
duke@435:   // If the cached methodOop has not been redefined, then
duke@435:   // _prev_methods will be NULL. If all of the previous
duke@435:   // versions of the method have been collected, then
duke@435:   // _prev_methods can have a length of zero.
duke@435:   GrowableArray<jweak>* _prev_methods;
duke@435: 
duke@435:  public:
duke@435:   ActiveMethodOopsCache()   { _prev_methods = NULL; }
duke@435:   ~ActiveMethodOopsCache();
duke@435: 
duke@435:   void add_previous_version(const methodOop method);
duke@435:   bool is_same_method(const methodOop method) const;
duke@435: };
duke@435: 
duke@435: 
duke@435: // A helper class for caching a methodOop when the user of the cache
duke@435: // only cares about the latest version of the methodOop.
duke@435: //
duke@435: class LatestMethodOopCache : public CommonMethodOopCache {
duke@435:   // This subclass adds a getter method for the latest methodOop.
duke@435: 
duke@435:  public:
duke@435:   methodOop get_methodOop();
duke@435: };
duke@435: 
kvn@1077: // For UseCompressedOops.
kvn@1077: struct NarrowOopStruct {
kvn@1077:   // Base address for oop-within-java-object materialization.
kvn@1077:   // NULL if using wide oops or zero based narrow oops.
kvn@1077:   address _base;
kvn@1077:   // Number of shift bits for encoding/decoding narrow oops.
kvn@1077:   // 0 if using wide oops or zero based unscaled narrow oops,
kvn@1077:   // LogMinObjAlignmentInBytes otherwise.
kvn@1077:   int     _shift;
kvn@1077:   // Generate code with implicit null checks for narrow oops.
kvn@1077:   bool    _use_implicit_null_checks;
kvn@1077: };
kvn@1077: 
johnc@2969: enum VerifyOption {
johnc@2969:       VerifyOption_Default = 0,
johnc@2969: 
johnc@2969:       // G1
johnc@2969:       VerifyOption_G1UsePrevMarking = VerifyOption_Default,
johnc@2969:       VerifyOption_G1UseNextMarking = VerifyOption_G1UsePrevMarking + 1,
johnc@2969:       VerifyOption_G1UseMarkWord    = VerifyOption_G1UseNextMarking + 1
johnc@2969: };
duke@435: 
duke@435: class Universe: AllStatic {
jcoomes@916:   // Ugh.  Universe is much too friendly.
duke@435:   friend class MarkSweep;
duke@435:   friend class oopDesc;
duke@435:   friend class ClassLoader;
duke@435:   friend class Arguments;
duke@435:   friend class SystemDictionary;
duke@435:   friend class VMStructs;
duke@435:   friend class CompactingPermGenGen;
duke@435:   friend class VM_PopulateDumpSharedSpace;
duke@435: 
duke@435:   friend jint  universe_init();
duke@435:   friend void  universe2_init();
duke@435:   friend bool  universe_post_init();
duke@435: 
duke@435:  private:
duke@435:   // Known classes in the VM
duke@435:   static klassOop _boolArrayKlassObj;
duke@435:   static klassOop _byteArrayKlassObj;
duke@435:   static klassOop _charArrayKlassObj;
duke@435:   static klassOop _intArrayKlassObj;
duke@435:   static klassOop _shortArrayKlassObj;
duke@435:   static klassOop _longArrayKlassObj;
duke@435:   static klassOop _singleArrayKlassObj;
duke@435:   static klassOop _doubleArrayKlassObj;
duke@435:   static klassOop _typeArrayKlassObjs[T_VOID+1];
duke@435: 
duke@435:   static klassOop _objectArrayKlassObj;
duke@435: 
duke@435:   static klassOop _methodKlassObj;
duke@435:   static klassOop _constMethodKlassObj;
duke@435:   static klassOop _methodDataKlassObj;
duke@435:   static klassOop _klassKlassObj;
duke@435:   static klassOop _arrayKlassKlassObj;
duke@435:   static klassOop _objArrayKlassKlassObj;
duke@435:   static klassOop _typeArrayKlassKlassObj;
duke@435:   static klassOop _instanceKlassKlassObj;
duke@435:   static klassOop _constantPoolKlassObj;
duke@435:   static klassOop _constantPoolCacheKlassObj;
duke@435:   static klassOop _compiledICHolderKlassObj;
duke@435:   static klassOop _systemObjArrayKlassObj;
duke@435: 
duke@435:   // Known objects in the VM
duke@435: 
duke@435:   // Primitive objects
duke@435:   static oop _int_mirror;
duke@435:   static oop _float_mirror;
duke@435:   static oop _double_mirror;
duke@435:   static oop _byte_mirror;
duke@435:   static oop _bool_mirror;
duke@435:   static oop _char_mirror;
duke@435:   static oop _long_mirror;
duke@435:   static oop _short_mirror;
duke@435:   static oop _void_mirror;
duke@435: 
duke@435:   static oop          _main_thread_group;             // Reference to the main thread group object
duke@435:   static oop          _system_thread_group;           // Reference to the system thread group object
duke@435: 
duke@435:   static typeArrayOop _the_empty_byte_array;          // Canonicalized byte array
duke@435:   static typeArrayOop _the_empty_short_array;         // Canonicalized short array
duke@435:   static typeArrayOop _the_empty_int_array;           // Canonicalized int array
duke@435:   static objArrayOop  _the_empty_system_obj_array;    // Canonicalized system obj array
duke@435:   static objArrayOop  _the_empty_class_klass_array;   // Canonicalized obj array of type java.lang.Class
duke@435:   static objArrayOop  _the_array_interfaces_array;    // Canonicalized 2-array of cloneable & serializable klasses
never@1515:   static oop          _the_null_string;               // A cache of "null" as a Java string
never@1515:   static oop          _the_min_jint_string;          // A cache of "-2147483648" as a Java string
duke@435:   static LatestMethodOopCache* _finalizer_register_cache; // static method for registering finalizable objects
duke@435:   static LatestMethodOopCache* _loader_addClass_cache;    // method for registering loaded classes in class loader vector
duke@435:   static ActiveMethodOopsCache* _reflect_invoke_cache;    // method for security checks
duke@435:   static oop          _out_of_memory_error_java_heap; // preallocated error object (no backtrace)
duke@435:   static oop          _out_of_memory_error_perm_gen;  // preallocated error object (no backtrace)
duke@435:   static oop          _out_of_memory_error_array_size;// preallocated error object (no backtrace)
duke@435:   static oop          _out_of_memory_error_gc_overhead_limit; // preallocated error object (no backtrace)
duke@435: 
duke@435:   // array of preallocated error objects with backtrace
duke@435:   static objArrayOop   _preallocated_out_of_memory_error_array;
duke@435: 
duke@435:   // number of preallocated error objects available for use
duke@435:   static volatile jint _preallocated_out_of_memory_error_avail_count;
duke@435: 
duke@435:   static oop          _null_ptr_exception_instance;   // preallocated exception object
duke@435:   static oop          _arithmetic_exception_instance; // preallocated exception object
duke@435:   static oop          _virtual_machine_error_instance; // preallocated exception object
duke@435:   // The object used as an exception dummy when exceptions are thrown for
duke@435:   // the vm thread.
duke@435:   static oop          _vm_exception;
duke@435: 
duke@435:   // The particular choice of collected heap.
duke@435:   static CollectedHeap* _collectedHeap;
kvn@1077: 
kvn@1077:   // For UseCompressedOops.
kvn@1077:   static struct NarrowOopStruct _narrow_oop;
duke@435: 
duke@435:   // array of dummy objects used with +FullGCAlot
duke@435:   debug_only(static objArrayOop _fullgc_alot_dummy_array;)
coleenp@548:   // index of next entry to clear
duke@435:   debug_only(static int         _fullgc_alot_dummy_next;)
duke@435: 
duke@435:   // Compiler/dispatch support
duke@435:   static int  _base_vtable_size;                      // Java vtbl size of klass Object (in words)
duke@435: 
duke@435:   // Initialization
duke@435:   static bool _bootstrapping;                         // true during genesis
duke@435:   static bool _fully_initialized;                     // true after universe_init and initialize_vtables called
duke@435: 
duke@435:   // the array of preallocated errors with backtraces
duke@435:   static objArrayOop  preallocated_out_of_memory_errors()     { return _preallocated_out_of_memory_error_array; }
duke@435: 
duke@435:   // generate an out of memory error; if possible using an error with preallocated backtrace;
duke@435:   // otherwise return the given default error.
duke@435:   static oop        gen_out_of_memory_error(oop default_err);
duke@435: 
duke@435:   // Historic gc information
duke@435:   static size_t _heap_capacity_at_last_gc;
duke@435:   static size_t _heap_used_at_last_gc;
duke@435: 
duke@435:   static jint initialize_heap();
duke@435:   static void initialize_basic_type_mirrors(TRAPS);
duke@435:   static void fixup_mirrors(TRAPS);
duke@435: 
duke@435:   static void reinitialize_vtable_of(KlassHandle h_k, TRAPS);
duke@435:   static void reinitialize_itables(TRAPS);
duke@435:   static void compute_base_vtable_size();             // compute vtable size of class Object
duke@435: 
duke@435:   static void genesis(TRAPS);                         // Create the initial world
duke@435: 
duke@435:   // Mirrors for primitive classes (created eagerly)
duke@435:   static oop check_mirror(oop m) {
duke@435:     assert(m != NULL, "mirror not initialized");
duke@435:     return m;
duke@435:   }
duke@435: 
duke@435:   // Debugging
duke@435:   static int _verify_count;                           // number of verifies done
duke@435:   // True during call to verify().  Should only be set/cleared in verify().
duke@435:   static bool _verify_in_progress;
duke@435: 
duke@435:   static void compute_verify_oop_data();
duke@435: 
duke@435:  public:
duke@435:   // Known classes in the VM
duke@435:   static klassOop boolArrayKlassObj()                 { return _boolArrayKlassObj;   }
duke@435:   static klassOop byteArrayKlassObj()                 { return _byteArrayKlassObj;   }
duke@435:   static klassOop charArrayKlassObj()                 { return _charArrayKlassObj;   }
duke@435:   static klassOop intArrayKlassObj()                  { return _intArrayKlassObj;    }
duke@435:   static klassOop shortArrayKlassObj()                { return _shortArrayKlassObj;  }
duke@435:   static klassOop longArrayKlassObj()                 { return _longArrayKlassObj;   }
duke@435:   static klassOop singleArrayKlassObj()               { return _singleArrayKlassObj; }
duke@435:   static klassOop doubleArrayKlassObj()               { return _doubleArrayKlassObj; }
duke@435: 
duke@435:   static klassOop objectArrayKlassObj() {
duke@435:     return _objectArrayKlassObj;
duke@435:   }
duke@435: 
duke@435:   static klassOop typeArrayKlassObj(BasicType t) {
twisti@3885:     assert((uint)t < T_VOID+1, err_msg("range check for type: %s", type2name(t)));
duke@435:     assert(_typeArrayKlassObjs[t] != NULL, "domain check");
duke@435:     return _typeArrayKlassObjs[t];
duke@435:   }
duke@435: 
duke@435:   static klassOop methodKlassObj()                    { return _methodKlassObj;            }
duke@435:   static klassOop constMethodKlassObj()               { return _constMethodKlassObj;         }
duke@435:   static klassOop methodDataKlassObj()                { return _methodDataKlassObj;        }
duke@435:   static klassOop klassKlassObj()                     { return _klassKlassObj;             }
duke@435:   static klassOop arrayKlassKlassObj()                { return _arrayKlassKlassObj;        }
duke@435:   static klassOop objArrayKlassKlassObj()             { return _objArrayKlassKlassObj;     }
duke@435:   static klassOop typeArrayKlassKlassObj()            { return _typeArrayKlassKlassObj;    }
duke@435:   static klassOop instanceKlassKlassObj()             { return _instanceKlassKlassObj;     }
duke@435:   static klassOop constantPoolKlassObj()              { return _constantPoolKlassObj;      }
duke@435:   static klassOop constantPoolCacheKlassObj()         { return _constantPoolCacheKlassObj; }
duke@435:   static klassOop compiledICHolderKlassObj()          { return _compiledICHolderKlassObj;  }
duke@435:   static klassOop systemObjArrayKlassObj()            { return _systemObjArrayKlassObj;    }
duke@435: 
coleenp@2497:   // Known objects in the VM
coleenp@2497:   static oop int_mirror()                   { return check_mirror(_int_mirror); }
duke@435:   static oop float_mirror()                 { return check_mirror(_float_mirror); }
duke@435:   static oop double_mirror()                { return check_mirror(_double_mirror); }
duke@435:   static oop byte_mirror()                  { return check_mirror(_byte_mirror); }
duke@435:   static oop bool_mirror()                  { return check_mirror(_bool_mirror); }
duke@435:   static oop char_mirror()                  { return check_mirror(_char_mirror); }
duke@435:   static oop long_mirror()                  { return check_mirror(_long_mirror); }
duke@435:   static oop short_mirror()                 { return check_mirror(_short_mirror); }
duke@435:   static oop void_mirror()                  { return check_mirror(_void_mirror); }
duke@435: 
duke@435:   // table of same
duke@435:   static oop _mirrors[T_VOID+1];
duke@435: 
duke@435:   static oop java_mirror(BasicType t) {
duke@435:     assert((uint)t < T_VOID+1, "range check");
duke@435:     return check_mirror(_mirrors[t]);
duke@435:   }
duke@435:   static oop      main_thread_group()                 { return _main_thread_group; }
duke@435:   static void set_main_thread_group(oop group)        { _main_thread_group = group;}
duke@435: 
duke@435:   static oop      system_thread_group()               { return _system_thread_group; }
duke@435:   static void set_system_thread_group(oop group)      { _system_thread_group = group;}
duke@435: 
duke@435:   static typeArrayOop the_empty_byte_array()          { return _the_empty_byte_array;          }
duke@435:   static typeArrayOop the_empty_short_array()         { return _the_empty_short_array;         }
duke@435:   static typeArrayOop the_empty_int_array()           { return _the_empty_int_array;           }
duke@435:   static objArrayOop  the_empty_system_obj_array ()   { return _the_empty_system_obj_array;    }
duke@435:   static objArrayOop  the_empty_class_klass_array ()  { return _the_empty_class_klass_array;   }
duke@435:   static objArrayOop  the_array_interfaces_array()    { return _the_array_interfaces_array;    }
never@1515:   static oop          the_null_string()               { return _the_null_string;               }
never@1515:   static oop          the_min_jint_string()          { return _the_min_jint_string;          }
duke@435:   static methodOop    finalizer_register_method()     { return _finalizer_register_cache->get_methodOop(); }
duke@435:   static methodOop    loader_addClass_method()        { return _loader_addClass_cache->get_methodOop(); }
duke@435:   static ActiveMethodOopsCache* reflect_invoke_cache() { return _reflect_invoke_cache; }
duke@435:   static oop          null_ptr_exception_instance()   { return _null_ptr_exception_instance;   }
duke@435:   static oop          arithmetic_exception_instance() { return _arithmetic_exception_instance; }
duke@435:   static oop          virtual_machine_error_instance() { return _virtual_machine_error_instance; }
duke@435:   static oop          vm_exception()                  { return _vm_exception; }
duke@435: 
duke@435:   // OutOfMemoryError support. Returns an error with the required message. The returned error
duke@435:   // may or may not have a backtrace. If error has a backtrace then the stack trace is already
duke@435:   // filled in.
duke@435:   static oop out_of_memory_error_java_heap()          { return gen_out_of_memory_error(_out_of_memory_error_java_heap);  }
duke@435:   static oop out_of_memory_error_perm_gen()           { return gen_out_of_memory_error(_out_of_memory_error_perm_gen);   }
duke@435:   static oop out_of_memory_error_array_size()         { return gen_out_of_memory_error(_out_of_memory_error_array_size); }
duke@435:   static oop out_of_memory_error_gc_overhead_limit()  { return gen_out_of_memory_error(_out_of_memory_error_gc_overhead_limit);  }
duke@435: 
duke@435:   // Accessors needed for fast allocation
duke@435:   static klassOop* boolArrayKlassObj_addr()           { return &_boolArrayKlassObj;   }
duke@435:   static klassOop* byteArrayKlassObj_addr()           { return &_byteArrayKlassObj;   }
duke@435:   static klassOop* charArrayKlassObj_addr()           { return &_charArrayKlassObj;   }
duke@435:   static klassOop* intArrayKlassObj_addr()            { return &_intArrayKlassObj;    }
duke@435:   static klassOop* shortArrayKlassObj_addr()          { return &_shortArrayKlassObj;  }
duke@435:   static klassOop* longArrayKlassObj_addr()           { return &_longArrayKlassObj;   }
duke@435:   static klassOop* singleArrayKlassObj_addr()         { return &_singleArrayKlassObj; }
duke@435:   static klassOop* doubleArrayKlassObj_addr()         { return &_doubleArrayKlassObj; }
jrose@2268:   static klassOop* systemObjArrayKlassObj_addr()      { return &_systemObjArrayKlassObj; }
duke@435: 
duke@435:   // The particular choice of collected heap.
duke@435:   static CollectedHeap* heap() { return _collectedHeap; }
duke@435: 
coleenp@548:   // For UseCompressedOops
kvn@1077:   static address* narrow_oop_base_addr()              { return &_narrow_oop._base; }
kvn@1077:   static address  narrow_oop_base()                   { return  _narrow_oop._base; }
kvn@1293:   static bool  is_narrow_oop_base(void* addr)         { return (narrow_oop_base() == (address)addr); }
kvn@1077:   static int      narrow_oop_shift()                  { return  _narrow_oop._shift; }
kvn@1077:   static void     set_narrow_oop_base(address base)   { _narrow_oop._base  = base; }
kvn@1077:   static void     set_narrow_oop_shift(int shift)     { _narrow_oop._shift = shift; }
kvn@1077:   static bool     narrow_oop_use_implicit_null_checks()             { return  _narrow_oop._use_implicit_null_checks; }
kvn@1077:   static void     set_narrow_oop_use_implicit_null_checks(bool use) { _narrow_oop._use_implicit_null_checks = use; }
kvn@1077:   // Narrow Oop encoding mode:
kvn@1077:   // 0 - Use 32-bits oops without encoding when
kvn@1077:   //     NarrowOopHeapBaseMin + heap_size < 4Gb
kvn@1077:   // 1 - Use zero based compressed oops with encoding when
kvn@1077:   //     NarrowOopHeapBaseMin + heap_size < 32Gb
kvn@1077:   // 2 - Use compressed oops with heap base + encoding.
kvn@1077:   enum NARROW_OOP_MODE {
kvn@1077:     UnscaledNarrowOop  = 0,
kvn@1077:     ZeroBasedNarrowOop = 1,
kvn@1077:     HeapBasedNarrowOop = 2
kvn@1077:   };
kvn@1077:   static char* preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode);
coleenp@548: 
duke@435:   // Historic gc information
duke@435:   static size_t get_heap_capacity_at_last_gc()         { return _heap_capacity_at_last_gc; }
duke@435:   static size_t get_heap_free_at_last_gc()             { return _heap_capacity_at_last_gc - _heap_used_at_last_gc; }
duke@435:   static size_t get_heap_used_at_last_gc()             { return _heap_used_at_last_gc; }
duke@435:   static void update_heap_info_at_gc();
duke@435: 
duke@435:   // Testers
duke@435:   static bool is_bootstrapping()                      { return _bootstrapping; }
duke@435:   static bool is_fully_initialized()                  { return _fully_initialized; }
duke@435: 
duke@435:   static inline bool element_type_should_be_aligned(BasicType type);
duke@435:   static inline bool field_type_should_be_aligned(BasicType type);
duke@435:   static bool        on_page_boundary(void* addr);
duke@435:   static bool        should_fill_in_stack_trace(Handle throwable);
duke@435:   static void check_alignment(uintx size, uintx alignment, const char* name);
duke@435: 
duke@435:   // Finalizer support.
duke@435:   static void run_finalizers_on_exit();
duke@435: 
duke@435:   // Iteration
duke@435: 
duke@435:   // Apply "f" to the addresses of all the direct heap pointers maintained
duke@435:   // as static fields of "Universe".
duke@435:   static void oops_do(OopClosure* f, bool do_all = false);
duke@435: 
duke@435:   // Apply "f" to all klasses for basic types (classes not present in
duke@435:   // SystemDictionary).
duke@435:   static void basic_type_classes_do(void f(klassOop));
duke@435: 
duke@435:   // Apply "f" to all system klasses (classes not present in SystemDictionary).
duke@435:   static void system_classes_do(void f(klassOop));
duke@435: 
duke@435:   // For sharing -- fill in a list of known vtable pointers.
duke@435:   static void init_self_patching_vtbl_list(void** list, int count);
duke@435: 
duke@435:   // Debugging
duke@435:   static bool verify_in_progress() { return _verify_in_progress; }
brutisso@3711:   static void verify(bool silent = false,
johnc@2969:                      VerifyOption option = VerifyOption_Default );
tonyp@3269:   static int  verify_count()       { return _verify_count; }
tonyp@3269:   // The default behavior is to call print_on() on gclog_or_tty.
duke@435:   static void print();
tonyp@3269:   // The extended parameter determines which method on the heap will
tonyp@3269:   // be called: print_on() (extended == false) or print_extended_on()
tonyp@3269:   // (extended == true).
tonyp@3269:   static void print_on(outputStream* st, bool extended = false);
duke@435:   static void print_heap_at_SIGBREAK();
duke@435:   static void print_heap_before_gc() { print_heap_before_gc(gclog_or_tty); }
duke@435:   static void print_heap_after_gc()  { print_heap_after_gc(gclog_or_tty); }
never@3571:   static void print_heap_before_gc(outputStream* st, bool ignore_extended = false);
never@3571:   static void print_heap_after_gc(outputStream* st, bool ignore_extended = false);
duke@435: 
duke@435:   // Change the number of dummy objects kept reachable by the full gc dummy
duke@435:   // array; this should trigger relocation in a sliding compaction collector.
duke@435:   debug_only(static bool release_fullgc_alot_dummy();)
duke@435:   // The non-oop pattern (see compiledIC.hpp, etc)
duke@435:   static void*   non_oop_word();
duke@435: 
duke@435:   // Oop verification (see MacroAssembler::verify_oop)
duke@435:   static uintptr_t verify_oop_mask()          PRODUCT_RETURN0;
duke@435:   static uintptr_t verify_oop_bits()          PRODUCT_RETURN0;
duke@435:   static uintptr_t verify_mark_bits()         PRODUCT_RETURN0;
duke@435:   static uintptr_t verify_mark_mask()         PRODUCT_RETURN0;
duke@435:   static uintptr_t verify_klass_mask()        PRODUCT_RETURN0;
duke@435:   static uintptr_t verify_klass_bits()        PRODUCT_RETURN0;
duke@435: 
duke@435:   // Flushing and deoptimization
duke@435:   static void flush_dependents_on(instanceKlassHandle dependee);
twisti@3050:   static void flush_dependents_on(Handle call_site, Handle method_handle);
duke@435: #ifdef HOTSWAP
duke@435:   // Flushing and deoptimization in case of evolution
duke@435:   static void flush_evol_dependents_on(instanceKlassHandle dependee);
duke@435: #endif // HOTSWAP
duke@435:   // Support for fullspeed debugging
duke@435:   static void flush_dependents_on_method(methodHandle dependee);
duke@435: 
duke@435:   // Compiler support
duke@435:   static int base_vtable_size()               { return _base_vtable_size; }
duke@435: };
duke@435: 
duke@435: class DeferredObjAllocEvent : public CHeapObj {
duke@435:   private:
duke@435:     oop    _oop;
duke@435:     size_t _bytesize;
duke@435:     jint   _arena_id;
duke@435: 
duke@435:   public:
duke@435:     DeferredObjAllocEvent(const oop o, const size_t s, const jint id) {
duke@435:       _oop      = o;
duke@435:       _bytesize = s;
duke@435:       _arena_id = id;
duke@435:     }
duke@435: 
duke@435:     ~DeferredObjAllocEvent() {
duke@435:     }
duke@435: 
duke@435:     jint   arena_id() { return _arena_id; }
duke@435:     size_t bytesize() { return _bytesize; }
duke@435:     oop    get_oop()  { return _oop; }
duke@435: };
stefank@2314: 
stefank@2314: #endif // SHARE_VM_MEMORY_UNIVERSE_HPP