author | iklam |
Tue, 16 Jan 2018 16:57:53 -0800 | |
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child 49364 | 601146c66cad |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_VM_MEMORY_ALLOCATION_HPP |
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#define SHARE_VM_MEMORY_ALLOCATION_HPP |
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#include "runtime/globals.hpp" |
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#include "utilities/globalDefinitions.hpp" |
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#include "utilities/macros.hpp" |
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#include <new> |
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class AllocFailStrategy { |
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public: |
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enum AllocFailEnum { EXIT_OOM, RETURN_NULL }; |
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}; |
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typedef AllocFailStrategy::AllocFailEnum AllocFailType; |
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// All classes in the virtual machine must be subclassed |
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// by one of the following allocation classes: |
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// |
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// For objects allocated in the resource area (see resourceArea.hpp). |
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// - ResourceObj |
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// |
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// For objects allocated in the C-heap (managed by: free & malloc). |
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// - CHeapObj |
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// |
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// For objects allocated on the stack. |
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// - StackObj |
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// |
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// For embedded objects. |
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// - ValueObj |
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// |
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// For classes used as name spaces. |
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// - AllStatic |
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// |
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// For classes in Metaspace (class data) |
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// - MetaspaceObj |
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// |
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// The printable subclasses are used for debugging and define virtual |
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// member functions for printing. Classes that avoid allocating the |
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// vtbl entries in the objects should therefore not be the printable |
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// subclasses. |
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// |
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// The following macros and function should be used to allocate memory |
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// directly in the resource area or in the C-heap, The _OBJ variants |
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// of the NEW/FREE_C_HEAP macros are used for alloc/dealloc simple |
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// objects which are not inherited from CHeapObj, note constructor and |
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// destructor are not called. The preferable way to allocate objects |
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// is using the new operator. |
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// |
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// WARNING: The array variant must only be used for a homogenous array |
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// where all objects are of the exact type specified. If subtypes are |
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// stored in the array then must pay attention to calling destructors |
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// at needed. |
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// |
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// NEW_RESOURCE_ARRAY(type, size) |
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// NEW_RESOURCE_OBJ(type) |
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// NEW_C_HEAP_ARRAY(type, size) |
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// NEW_C_HEAP_OBJ(type, memflags) |
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// FREE_C_HEAP_ARRAY(type, old) |
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// FREE_C_HEAP_OBJ(objname, type, memflags) |
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// char* AllocateHeap(size_t size, const char* name); |
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// void FreeHeap(void* p); |
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// |
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// C-heap allocation can be traced using +PrintHeapAllocation. |
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// malloc and free should therefore never called directly. |
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// Base class for objects allocated in the C-heap. |
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// In non product mode we introduce a super class for all allocation classes |
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// that supports printing. |
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// We avoid the superclass in product mode since some C++ compilers add |
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// a word overhead for empty super classes. |
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#ifdef PRODUCT |
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#define ALLOCATION_SUPER_CLASS_SPEC |
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#else |
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#define ALLOCATION_SUPER_CLASS_SPEC : public AllocatedObj |
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class AllocatedObj { |
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public: |
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// Printing support |
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void print() const; |
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void print_value() const; |
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virtual void print_on(outputStream* st) const; |
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virtual void print_value_on(outputStream* st) const; |
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}; |
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#endif |
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/* |
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* Memory types |
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*/ |
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enum MemoryType { |
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// Memory type by sub systems. It occupies lower byte. |
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mtJavaHeap = 0x00, // Java heap |
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mtClass = 0x01, // memory class for Java classes |
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mtThread = 0x02, // memory for thread objects |
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mtThreadStack = 0x03, |
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mtCode = 0x04, // memory for generated code |
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mtGC = 0x05, // memory for GC |
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mtCompiler = 0x06, // memory for compiler |
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mtInternal = 0x07, // memory used by VM, but does not belong to |
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// any of above categories, and not used for |
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// native memory tracking |
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mtOther = 0x08, // memory not used by VM |
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mtSymbol = 0x09, // symbol |
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mtNMT = 0x0A, // memory used by native memory tracking |
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mtClassShared = 0x0B, // class data sharing |
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mtChunk = 0x0C, // chunk that holds content of arenas |
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mtTest = 0x0D, // Test type for verifying NMT |
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mtTracing = 0x0E, // memory used for Tracing |
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mtLogging = 0x0F, // memory for logging |
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mtArguments = 0x10, // memory for argument processing |
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mtModule = 0x11, // memory for module processing |
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mtNone = 0x12, // undefined |
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mt_number_of_types = 0x13 // number of memory types (mtDontTrack |
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// is not included as validate type) |
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}; |
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typedef MemoryType MEMFLAGS; |
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#if INCLUDE_NMT |
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extern bool NMT_track_callsite; |
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#else |
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const bool NMT_track_callsite = false; |
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#endif // INCLUDE_NMT |
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class NativeCallStack; |
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template <MEMFLAGS F> class CHeapObj ALLOCATION_SUPER_CLASS_SPEC { |
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public: |
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NOINLINE void* operator new(size_t size, const NativeCallStack& stack) throw(); |
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NOINLINE void* operator new(size_t size) throw(); |
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NOINLINE void* operator new (size_t size, const std::nothrow_t& nothrow_constant, |
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const NativeCallStack& stack) throw(); |
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NOINLINE void* operator new (size_t size, const std::nothrow_t& nothrow_constant) |
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throw(); |
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NOINLINE void* operator new [](size_t size, const NativeCallStack& stack) throw(); |
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NOINLINE void* operator new [](size_t size) throw(); |
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NOINLINE void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, |
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const NativeCallStack& stack) throw(); |
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NOINLINE void* operator new [](size_t size, const std::nothrow_t& nothrow_constant) |
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throw(); |
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void operator delete(void* p); |
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void operator delete [] (void* p); |
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}; |
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// Base class for objects allocated on the stack only. |
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// Calling new or delete will result in fatal error. |
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class StackObj ALLOCATION_SUPER_CLASS_SPEC { |
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private: |
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void* operator new(size_t size) throw(); |
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void* operator new [](size_t size) throw(); |
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#ifdef __IBMCPP__ |
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public: |
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#endif |
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void operator delete(void* p); |
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void operator delete [](void* p); |
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}; |
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// Base class for objects used as value objects. |
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// Calling new or delete will result in fatal error. |
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// |
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// Portability note: Certain compilers (e.g. gcc) will |
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// always make classes bigger if it has a superclass, even |
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// if the superclass does not have any virtual methods or |
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// instance fields. The HotSpot implementation relies on this |
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// not to happen. So never make a ValueObj class a direct subclass |
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// of this object, but use the VALUE_OBJ_CLASS_SPEC class instead, e.g., |
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// like this: |
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// |
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// class A VALUE_OBJ_CLASS_SPEC { |
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// ... |
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// } |
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// |
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// With gcc and possible other compilers the VALUE_OBJ_CLASS_SPEC can |
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// be defined as a an empty string "". |
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// |
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class _ValueObj { |
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private: |
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void* operator new(size_t size) throw(); |
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void operator delete(void* p); |
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void* operator new [](size_t size) throw(); |
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void operator delete [](void* p); |
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}; |
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// Base class for objects stored in Metaspace. |
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// Calling delete will result in fatal error. |
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// |
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// Do not inherit from something with a vptr because this class does |
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// not introduce one. This class is used to allocate both shared read-only |
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// and shared read-write classes. |
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// |
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class ClassLoaderData; |
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class MetaspaceClosure; |
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class MetaspaceObj { |
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friend class MetaspaceShared; |
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// When CDS is enabled, all shared metaspace objects are mapped |
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// into a single contiguous memory block, so we can use these |
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// two pointers to quickly determine if something is in the |
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// shared metaspace. |
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// |
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// When CDS is not enabled, both pointers are set to NULL. |
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static void* _shared_metaspace_base; // (inclusive) low address |
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static void* _shared_metaspace_top; // (exclusive) high address |
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public: |
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bool is_metaspace_object() const; |
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bool is_shared() const { |
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// If no shared metaspace regions are mapped, _shared_metaspace_{base,top} will |
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// both be NULL and all values of p will be rejected quickly. |
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return (((void*)this) < _shared_metaspace_top && ((void*)this) >= _shared_metaspace_base); |
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} |
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void print_address_on(outputStream* st) const; // nonvirtual address printing |
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#define METASPACE_OBJ_TYPES_DO(f) \ |
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f(Class) \ |
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f(Symbol) \ |
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f(TypeArrayU1) \ |
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f(TypeArrayU2) \ |
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f(TypeArrayU4) \ |
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f(TypeArrayU8) \ |
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f(TypeArrayOther) \ |
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f(Method) \ |
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f(ConstMethod) \ |
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f(MethodData) \ |
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f(ConstantPool) \ |
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f(ConstantPoolCache) \ |
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f(Annotations) \ |
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f(MethodCounters) |
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264 |
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#define METASPACE_OBJ_TYPE_DECLARE(name) name ## Type, |
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#define METASPACE_OBJ_TYPE_NAME_CASE(name) case name ## Type: return #name; |
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|
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enum Type { |
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// Types are MetaspaceObj::ClassType, MetaspaceObj::SymbolType, etc |
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METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_DECLARE) |
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_number_of_types |
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}; |
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|
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static const char * type_name(Type type) { |
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switch(type) { |
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METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_NAME_CASE) |
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default: |
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ShouldNotReachHere(); |
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return NULL; |
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} |
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} |
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282 |
|
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static MetaspaceObj::Type array_type(size_t elem_size) { |
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switch (elem_size) { |
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case 1: return TypeArrayU1Type; |
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case 2: return TypeArrayU2Type; |
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case 4: return TypeArrayU4Type; |
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case 8: return TypeArrayU8Type; |
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default: |
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return TypeArrayOtherType; |
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} |
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} |
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293 |
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void* operator new(size_t size, ClassLoaderData* loader_data, |
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size_t word_size, |
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Type type, Thread* thread) throw(); |
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// can't use TRAPS from this header file. |
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void operator delete(void* p) { ShouldNotCallThis(); } |
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|
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// Declare a *static* method with the same signature in any subclass of MetaspaceObj |
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// that should be read-only by default. See symbol.hpp for an example. This function |
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// is used by the templates in metaspaceClosure.hpp |
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static bool is_read_only_by_default() { return false; } |
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}; |
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305 |
|
1 | 306 |
// Base class for classes that constitute name spaces. |
307 |
||
46818 | 308 |
class Arena; |
309 |
||
1 | 310 |
class AllStatic { |
311 |
public: |
|
312 |
AllStatic() { ShouldNotCallThis(); } |
|
313 |
~AllStatic() { ShouldNotCallThis(); } |
|
314 |
}; |
|
315 |
||
316 |
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extern char* resource_allocate_bytes(size_t size, |
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AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
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extern char* resource_allocate_bytes(Thread* thread, size_t size, |
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AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
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extern char* resource_reallocate_bytes( char *old, size_t old_size, size_t new_size, |
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AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
1 | 323 |
extern void resource_free_bytes( char *old, size_t size ); |
324 |
||
325 |
//---------------------------------------------------------------------- |
|
326 |
// Base class for objects allocated in the resource area per default. |
|
327 |
// Optionally, objects may be allocated on the C heap with |
|
328 |
// new(ResourceObj::C_HEAP) Foo(...) or in an Arena with new (&arena) |
|
329 |
// ResourceObj's can be allocated within other objects, but don't use |
|
330 |
// new or delete (allocation_type is unknown). If new is used to allocate, |
|
331 |
// use delete to deallocate. |
|
332 |
class ResourceObj ALLOCATION_SUPER_CLASS_SPEC { |
|
333 |
public: |
|
6180 | 334 |
enum allocation_type { STACK_OR_EMBEDDED = 0, RESOURCE_AREA, C_HEAP, ARENA, allocation_mask = 0x3 }; |
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static void set_allocation_type(address res, allocation_type type) NOT_DEBUG_RETURN; |
1 | 336 |
#ifdef ASSERT |
337 |
private: |
|
6180 | 338 |
// When this object is allocated on stack the new() operator is not |
339 |
// called but garbage on stack may look like a valid allocation_type. |
|
340 |
// Store negated 'this' pointer when new() is called to distinguish cases. |
|
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// Use second array's element for verification value to distinguish garbage. |
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uintptr_t _allocation_t[2]; |
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343 |
bool is_type_set() const; |
1 | 344 |
public: |
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allocation_type get_allocation_type() const; |
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bool allocated_on_stack() const { return get_allocation_type() == STACK_OR_EMBEDDED; } |
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bool allocated_on_res_area() const { return get_allocation_type() == RESOURCE_AREA; } |
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bool allocated_on_C_heap() const { return get_allocation_type() == C_HEAP; } |
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bool allocated_on_arena() const { return get_allocation_type() == ARENA; } |
22551 | 350 |
ResourceObj(); // default constructor |
351 |
ResourceObj(const ResourceObj& r); // default copy constructor |
|
6180 | 352 |
ResourceObj& operator=(const ResourceObj& r); // default copy assignment |
353 |
~ResourceObj(); |
|
1 | 354 |
#endif // ASSERT |
355 |
||
356 |
public: |
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void* operator new(size_t size, allocation_type type, MEMFLAGS flags) throw(); |
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void* operator new [](size_t size, allocation_type type, MEMFLAGS flags) throw(); |
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void* operator new(size_t size, const std::nothrow_t& nothrow_constant, |
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allocation_type type, MEMFLAGS flags) throw(); |
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void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, |
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allocation_type type, MEMFLAGS flags) throw(); |
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363 |
|
46818 | 364 |
void* operator new(size_t size, Arena *arena) throw(); |
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365 |
|
46818 | 366 |
void* operator new [](size_t size, Arena *arena) throw(); |
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367 |
|
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368 |
void* operator new(size_t size) throw() { |
1 | 369 |
address res = (address)resource_allocate_bytes(size); |
6180 | 370 |
DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) |
1 | 371 |
return res; |
372 |
} |
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373 |
|
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void* operator new(size_t size, const std::nothrow_t& nothrow_constant) throw() { |
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address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); |
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DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) |
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return res; |
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378 |
} |
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379 |
|
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380 |
void* operator new [](size_t size) throw() { |
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address res = (address)resource_allocate_bytes(size); |
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382 |
DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) |
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383 |
return res; |
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|
384 |
} |
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|
385 |
|
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|
386 |
void* operator new [](size_t size, const std::nothrow_t& nothrow_constant) throw() { |
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|
387 |
address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); |
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|
388 |
DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) |
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|
389 |
return res; |
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|
390 |
} |
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|
391 |
|
1 | 392 |
void operator delete(void* p); |
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|
393 |
void operator delete [](void* p); |
1 | 394 |
}; |
395 |
||
396 |
// One of the following macros must be used when allocating an array |
|
397 |
// or object to determine whether it should reside in the C heap on in |
|
398 |
// the resource area. |
|
399 |
||
400 |
#define NEW_RESOURCE_ARRAY(type, size)\ |
|
401 |
(type*) resource_allocate_bytes((size) * sizeof(type)) |
|
402 |
||
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|
403 |
#define NEW_RESOURCE_ARRAY_RETURN_NULL(type, size)\ |
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|
404 |
(type*) resource_allocate_bytes((size) * sizeof(type), AllocFailStrategy::RETURN_NULL) |
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|
405 |
|
1 | 406 |
#define NEW_RESOURCE_ARRAY_IN_THREAD(thread, type, size)\ |
407 |
(type*) resource_allocate_bytes(thread, (size) * sizeof(type)) |
|
408 |
||
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|
409 |
#define NEW_RESOURCE_ARRAY_IN_THREAD_RETURN_NULL(thread, type, size)\ |
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|
410 |
(type*) resource_allocate_bytes(thread, (size) * sizeof(type), AllocFailStrategy::RETURN_NULL) |
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|
411 |
|
1 | 412 |
#define REALLOC_RESOURCE_ARRAY(type, old, old_size, new_size)\ |
18083
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|
413 |
(type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type), (new_size) * sizeof(type)) |
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|
414 |
|
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|
415 |
#define REALLOC_RESOURCE_ARRAY_RETURN_NULL(type, old, old_size, new_size)\ |
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|
416 |
(type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type),\ |
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|
417 |
(new_size) * sizeof(type), AllocFailStrategy::RETURN_NULL) |
1 | 418 |
|
419 |
#define FREE_RESOURCE_ARRAY(type, old, size)\ |
|
420 |
resource_free_bytes((char*)(old), (size) * sizeof(type)) |
|
421 |
||
422 |
#define FREE_FAST(old)\ |
|
423 |
/* nop */ |
|
424 |
||
425 |
#define NEW_RESOURCE_OBJ(type)\ |
|
426 |
NEW_RESOURCE_ARRAY(type, 1) |
|
427 |
||
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|
428 |
#define NEW_RESOURCE_OBJ_RETURN_NULL(type)\ |
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|
429 |
NEW_RESOURCE_ARRAY_RETURN_NULL(type, 1) |
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|
430 |
|
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|
431 |
#define NEW_C_HEAP_ARRAY3(type, size, memflags, pc, allocfail)\ |
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|
432 |
(type*) AllocateHeap((size) * sizeof(type), memflags, pc, allocfail) |
18083
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|
433 |
|
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|
434 |
#define NEW_C_HEAP_ARRAY2(type, size, memflags, pc)\ |
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|
435 |
(type*) (AllocateHeap((size) * sizeof(type), memflags, pc)) |
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|
436 |
|
13195 | 437 |
#define NEW_C_HEAP_ARRAY(type, size, memflags)\ |
438 |
(type*) (AllocateHeap((size) * sizeof(type), memflags)) |
|
1 | 439 |
|
18083
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|
440 |
#define NEW_C_HEAP_ARRAY2_RETURN_NULL(type, size, memflags, pc)\ |
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|
441 |
NEW_C_HEAP_ARRAY3(type, (size), memflags, pc, AllocFailStrategy::RETURN_NULL) |
18083
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|
442 |
|
6424d03bb556
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|
443 |
#define NEW_C_HEAP_ARRAY_RETURN_NULL(type, size, memflags)\ |
25946 | 444 |
NEW_C_HEAP_ARRAY3(type, (size), memflags, CURRENT_PC, AllocFailStrategy::RETURN_NULL) |
18083
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|
445 |
|
13195 | 446 |
#define REALLOC_C_HEAP_ARRAY(type, old, size, memflags)\ |
19545
409c50cf1e5d
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|
447 |
(type*) (ReallocateHeap((char*)(old), (size) * sizeof(type), memflags)) |
13195 | 448 |
|
18083
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parents:
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diff
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|
449 |
#define REALLOC_C_HEAP_ARRAY_RETURN_NULL(type, old, size, memflags)\ |
19545
409c50cf1e5d
8022683: JNI GetStringUTFChars should return NULL on allocation failure not abort the VM
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|
450 |
(type*) (ReallocateHeap((char*)(old), (size) * sizeof(type), memflags, AllocFailStrategy::RETURN_NULL)) |
18083
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|
451 |
|
27880
afb974a04396
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diff
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|
452 |
#define FREE_C_HEAP_ARRAY(type, old) \ |
afb974a04396
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|
453 |
FreeHeap((char*)(old)) |
1 | 454 |
|
17376
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|
455 |
// allocate type in heap without calling ctor |
4ee999c3c007
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|
456 |
#define NEW_C_HEAP_OBJ(type, memflags)\ |
4ee999c3c007
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|
457 |
NEW_C_HEAP_ARRAY(type, 1, memflags) |
1 | 458 |
|
18083
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8016105: Add complementary RETURN_NULL allocation macros in allocation.hpp
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|
459 |
#define NEW_C_HEAP_OBJ_RETURN_NULL(type, memflags)\ |
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|
460 |
NEW_C_HEAP_ARRAY_RETURN_NULL(type, 1, memflags) |
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mgronlun
parents:
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|
461 |
|
17376
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parents:
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|
462 |
// deallocate obj of type in heap without calling dtor |
27880
afb974a04396
8060074: os::free() takes MemoryTrackingLevel but doesn't need it
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|
463 |
#define FREE_C_HEAP_OBJ(objname)\ |
afb974a04396
8060074: os::free() takes MemoryTrackingLevel but doesn't need it
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parents:
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diff
changeset
|
464 |
FreeHeap((char*)objname); |
1 | 465 |
|
466 |
// for statistics |
|
467 |
#ifndef PRODUCT |
|
468 |
class AllocStats : StackObj { |
|
8320 | 469 |
julong start_mallocs, start_frees; |
470 |
julong start_malloc_bytes, start_mfree_bytes, start_res_bytes; |
|
1 | 471 |
public: |
472 |
AllocStats(); |
|
473 |
||
8320 | 474 |
julong num_mallocs(); // since creation of receiver |
475 |
julong alloc_bytes(); |
|
476 |
julong num_frees(); |
|
477 |
julong free_bytes(); |
|
478 |
julong resource_bytes(); |
|
1 | 479 |
void print(); |
480 |
}; |
|
481 |
#endif |
|
482 |
||
483 |
||
484 |
//------------------------------ReallocMark--------------------------------- |
|
485 |
// Code which uses REALLOC_RESOURCE_ARRAY should check an associated |
|
486 |
// ReallocMark, which is declared in the same scope as the reallocated |
|
487 |
// pointer. Any operation that could __potentially__ cause a reallocation |
|
488 |
// should check the ReallocMark. |
|
489 |
class ReallocMark: public StackObj { |
|
490 |
protected: |
|
491 |
NOT_PRODUCT(int _nesting;) |
|
492 |
||
493 |
public: |
|
494 |
ReallocMark() PRODUCT_RETURN; |
|
495 |
void check() PRODUCT_RETURN; |
|
496 |
}; |
|
7397 | 497 |
|
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|
498 |
// Helper class to allocate arrays that may become large. |
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diff
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|
499 |
// Uses the OS malloc for allocations smaller than ArrayAllocatorMallocLimit |
4e30a46f6b76
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changeset
|
500 |
// and uses mapped memory for larger allocations. |
4e30a46f6b76
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parents:
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diff
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|
501 |
// Most OS mallocs do something similar but Solaris malloc does not revert |
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7197666: java -d64 -version core dumps in a box with lots of memory
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parents:
15452
diff
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|
502 |
// to mapped memory for large allocations. By default ArrayAllocatorMallocLimit |
4e30a46f6b76
7197666: java -d64 -version core dumps in a box with lots of memory
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parents:
15452
diff
changeset
|
503 |
// is set so that we always use malloc except for Solaris where we set the |
4e30a46f6b76
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parents:
15452
diff
changeset
|
504 |
// limit to get mapped memory. |
46704
211b3f6b75ef
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parents:
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diff
changeset
|
505 |
template <class E> |
37057 | 506 |
class ArrayAllocator : public AllStatic { |
507 |
private: |
|
508 |
static bool should_use_malloc(size_t length); |
|
509 |
||
46704
211b3f6b75ef
8182169: ArrayAllocator should take MEMFLAGS as regular parameter
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parents:
46625
diff
changeset
|
510 |
static E* allocate_malloc(size_t length, MEMFLAGS flags); |
211b3f6b75ef
8182169: ArrayAllocator should take MEMFLAGS as regular parameter
kbarrett
parents:
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diff
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|
511 |
static E* allocate_mmap(size_t length, MEMFLAGS flags); |
23545
2c14fb03a06d
8037959: BitMap::resize frees old map before copying memory if !in_resource_area
mgerdin
parents:
22876
diff
changeset
|
512 |
|
37057 | 513 |
static void free_malloc(E* addr, size_t length); |
514 |
static void free_mmap(E* addr, size_t length); |
|
515 |
||
16682
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diff
changeset
|
516 |
public: |
46704
211b3f6b75ef
8182169: ArrayAllocator should take MEMFLAGS as regular parameter
kbarrett
parents:
46625
diff
changeset
|
517 |
static E* allocate(size_t length, MEMFLAGS flags); |
211b3f6b75ef
8182169: ArrayAllocator should take MEMFLAGS as regular parameter
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parents:
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diff
changeset
|
518 |
static E* reallocate(E* old_addr, size_t old_length, size_t new_length, MEMFLAGS flags); |
37057 | 519 |
static void free(E* addr, size_t length); |
16682
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diff
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|
520 |
}; |
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parents:
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diff
changeset
|
521 |
|
37096
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parents:
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diff
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|
522 |
// Uses mmaped memory for all allocations. All allocations are initially |
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
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diff
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|
523 |
// zero-filled. No pre-touching. |
46704
211b3f6b75ef
8182169: ArrayAllocator should take MEMFLAGS as regular parameter
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parents:
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|
524 |
template <class E> |
37096
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
stefank
parents:
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diff
changeset
|
525 |
class MmapArrayAllocator : public AllStatic { |
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
stefank
parents:
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diff
changeset
|
526 |
private: |
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
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diff
changeset
|
527 |
static size_t size_for(size_t length); |
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
stefank
parents:
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diff
changeset
|
528 |
|
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
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parents:
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diff
changeset
|
529 |
public: |
46704
211b3f6b75ef
8182169: ArrayAllocator should take MEMFLAGS as regular parameter
kbarrett
parents:
46625
diff
changeset
|
530 |
static E* allocate_or_null(size_t length, MEMFLAGS flags); |
211b3f6b75ef
8182169: ArrayAllocator should take MEMFLAGS as regular parameter
kbarrett
parents:
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diff
changeset
|
531 |
static E* allocate(size_t length, MEMFLAGS flags); |
37096
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
stefank
parents:
37092
diff
changeset
|
532 |
static void free(E* addr, size_t length); |
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
stefank
parents:
37092
diff
changeset
|
533 |
}; |
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
stefank
parents:
37092
diff
changeset
|
534 |
|
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
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parents:
37092
diff
changeset
|
535 |
// Uses malloc:ed memory for all allocations. |
46704
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8182169: ArrayAllocator should take MEMFLAGS as regular parameter
kbarrett
parents:
46625
diff
changeset
|
536 |
template <class E> |
37096
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
stefank
parents:
37092
diff
changeset
|
537 |
class MallocArrayAllocator : public AllStatic { |
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
stefank
parents:
37092
diff
changeset
|
538 |
public: |
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
stefank
parents:
37092
diff
changeset
|
539 |
static size_t size_for(size_t length); |
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
stefank
parents:
37092
diff
changeset
|
540 |
|
46704
211b3f6b75ef
8182169: ArrayAllocator should take MEMFLAGS as regular parameter
kbarrett
parents:
46625
diff
changeset
|
541 |
static E* allocate(size_t length, MEMFLAGS flags); |
37096
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
stefank
parents:
37092
diff
changeset
|
542 |
static void free(E* addr, size_t length); |
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
stefank
parents:
37092
diff
changeset
|
543 |
}; |
42437cf54027
8151534: Refactor ArrayAllocator for easier reuse
stefank
parents:
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diff
changeset
|
544 |
|
7397 | 545 |
#endif // SHARE_VM_MEMORY_ALLOCATION_HPP |