570 lines
21 KiB
C++
570 lines
21 KiB
C++
/*
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* Copyright (c) 1997, 2019, 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_MEMORY_ALLOCATION_HPP
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#define SHARE_MEMORY_ALLOCATION_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 outputStream;
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class Thread;
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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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// The virtual machine must never call one of the implicitly declared
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// global allocation or deletion functions. (Such calls may result in
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// link-time or run-time errors.) For convenience and documentation of
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// intended use, classes in the virtual machine may be derived from one
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// of the following allocation classes, some of which define allocation
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// and deletion functions.
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// Note: std::malloc and std::free should never called directly.
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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 and tracked with NMT)
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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 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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// 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 to save space.
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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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#define MEMORY_TYPES_DO(f) \
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/* Memory type by sub systems. It occupies lower byte. */ \
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f(mtJavaHeap, "Java Heap") /* Java heap */ \
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f(mtClass, "Class") /* Java classes */ \
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f(mtThread, "Thread") /* thread objects */ \
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f(mtThreadStack, "Thread Stack") \
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f(mtCode, "Code") /* generated code */ \
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f(mtGC, "GC") \
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f(mtCompiler, "Compiler") \
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f(mtJVMCI, "JVMCI") \
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f(mtInternal, "Internal") /* memory used by VM, but does not belong to */ \
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/* any of above categories, and not used by */ \
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/* NMT */ \
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f(mtOther, "Other") /* memory not used by VM */ \
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f(mtSymbol, "Symbol") \
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f(mtNMT, "Native Memory Tracking") /* memory used by NMT */ \
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f(mtClassShared, "Shared class space") /* class data sharing */ \
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f(mtChunk, "Arena Chunk") /* chunk that holds content of arenas */ \
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f(mtTest, "Test") /* Test type for verifying NMT */ \
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f(mtTracing, "Tracing") \
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f(mtLogging, "Logging") \
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f(mtStatistics, "Statistics") \
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f(mtArguments, "Arguments") \
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f(mtModule, "Module") \
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f(mtSafepoint, "Safepoint") \
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f(mtSynchronizer, "Synchronization") \
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f(mtNone, "Unknown") \
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//end
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#define MEMORY_TYPE_DECLARE_ENUM(type, human_readable) \
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type,
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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_TYPES_DO(MEMORY_TYPE_DECLARE_ENUM)
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mt_number_of_types // 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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char* AllocateHeap(size_t size,
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MEMFLAGS flags,
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const NativeCallStack& stack,
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AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
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char* AllocateHeap(size_t size,
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MEMFLAGS flags,
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AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
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char* ReallocateHeap(char *old,
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size_t size,
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MEMFLAGS flag,
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AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
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void FreeHeap(void* p);
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template <MEMFLAGS F> class CHeapObj ALLOCATION_SUPER_CLASS_SPEC {
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public:
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ALWAYSINLINE void* operator new(size_t size) throw() {
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return (void*)AllocateHeap(size, F);
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}
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ALWAYSINLINE void* operator new(size_t size,
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const NativeCallStack& stack) throw() {
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return (void*)AllocateHeap(size, F, stack);
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}
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ALWAYSINLINE void* operator new(size_t size, const std::nothrow_t&,
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const NativeCallStack& stack) throw() {
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return (void*)AllocateHeap(size, F, stack, AllocFailStrategy::RETURN_NULL);
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}
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ALWAYSINLINE void* operator new(size_t size, const std::nothrow_t&) throw() {
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return (void*)AllocateHeap(size, F, AllocFailStrategy::RETURN_NULL);
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}
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ALWAYSINLINE void* operator new[](size_t size) throw() {
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return (void*)AllocateHeap(size, F);
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}
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ALWAYSINLINE void* operator new[](size_t size,
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const NativeCallStack& stack) throw() {
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return (void*)AllocateHeap(size, F, stack);
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}
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ALWAYSINLINE void* operator new[](size_t size, const std::nothrow_t&,
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const NativeCallStack& stack) throw() {
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return (void*)AllocateHeap(size, F, stack, AllocFailStrategy::RETURN_NULL);
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}
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ALWAYSINLINE void* operator new[](size_t size, const std::nothrow_t&) throw() {
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return (void*)AllocateHeap(size, F, AllocFailStrategy::RETURN_NULL);
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}
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void operator delete(void* p) { FreeHeap(p); }
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void operator delete [] (void* p) { FreeHeap(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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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 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 VMStructs;
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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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// 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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// Returns true if the pointer points to a valid MetaspaceObj. A valid
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// MetaspaceObj is MetaWord-aligned and contained within either
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// non-shared or shared metaspace.
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static bool is_valid(const MetaspaceObj* p);
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static bool is_shared(const MetaspaceObj* p) {
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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*)p) < _shared_metaspace_top &&
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((void*)p) >= _shared_metaspace_base);
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}
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bool is_shared() const { return MetaspaceObj::is_shared(this); }
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void print_address_on(outputStream* st) const; // nonvirtual address printing
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static void set_shared_metaspace_range(void* base, void* top) {
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_shared_metaspace_base = base;
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_shared_metaspace_top = top;
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}
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static void expand_shared_metaspace_range(void* top) {
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assert(top >= _shared_metaspace_top, "must be");
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_shared_metaspace_top = top;
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}
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static void* shared_metaspace_base() { return _shared_metaspace_base; }
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static void* shared_metaspace_top() { return _shared_metaspace_top; }
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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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#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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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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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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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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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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// 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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// Base class for classes that constitute name spaces.
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class Arena;
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class AllStatic {
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public:
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AllStatic() { ShouldNotCallThis(); }
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~AllStatic() { ShouldNotCallThis(); }
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};
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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);
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extern void resource_free_bytes( char *old, size_t size );
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//----------------------------------------------------------------------
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// Base class for objects allocated in the resource area per default.
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// Optionally, objects may be allocated on the C heap with
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// new(ResourceObj::C_HEAP) Foo(...) or in an Arena with new (&arena)
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// ResourceObj's can be allocated within other objects, but don't use
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// new or delete (allocation_type is unknown). If new is used to allocate,
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// use delete to deallocate.
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class ResourceObj ALLOCATION_SUPER_CLASS_SPEC {
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public:
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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;
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#ifdef ASSERT
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private:
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// When this object is allocated on stack the new() operator is not
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// called but garbage on stack may look like a valid allocation_type.
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// 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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bool is_type_set() const;
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void initialize_allocation_info();
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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; }
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protected:
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ResourceObj(); // default constructor
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ResourceObj(const ResourceObj& r); // default copy constructor
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ResourceObj& operator=(const ResourceObj& r); // default copy assignment
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~ResourceObj();
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#endif // ASSERT
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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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void* operator new(size_t size, Arena *arena) throw();
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void* operator new [](size_t size, Arena *arena) throw();
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void* operator new(size_t size) throw() {
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address res = (address)resource_allocate_bytes(size);
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DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);)
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return res;
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}
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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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}
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void* operator new [](size_t size) throw() {
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address res = (address)resource_allocate_bytes(size);
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DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);)
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return res;
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}
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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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}
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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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// One of the following macros must be used when allocating an array
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// or object to determine whether it should reside in the C heap on in
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// the resource area.
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#define NEW_RESOURCE_ARRAY(type, size)\
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(type*) resource_allocate_bytes((size) * sizeof(type))
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#define NEW_RESOURCE_ARRAY_RETURN_NULL(type, size)\
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(type*) resource_allocate_bytes((size) * sizeof(type), AllocFailStrategy::RETURN_NULL)
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#define NEW_RESOURCE_ARRAY_IN_THREAD(thread, type, size)\
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(type*) resource_allocate_bytes(thread, (size) * sizeof(type))
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#define NEW_RESOURCE_ARRAY_IN_THREAD_RETURN_NULL(thread, type, size)\
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(type*) resource_allocate_bytes(thread, (size) * sizeof(type), AllocFailStrategy::RETURN_NULL)
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#define REALLOC_RESOURCE_ARRAY(type, old, old_size, new_size)\
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(type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type), (new_size) * sizeof(type))
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#define REALLOC_RESOURCE_ARRAY_RETURN_NULL(type, old, old_size, new_size)\
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(type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type),\
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(new_size) * sizeof(type), AllocFailStrategy::RETURN_NULL)
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#define FREE_RESOURCE_ARRAY(type, old, size)\
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resource_free_bytes((char*)(old), (size) * sizeof(type))
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#define FREE_FAST(old)\
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/* nop */
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#define NEW_RESOURCE_OBJ(type)\
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NEW_RESOURCE_ARRAY(type, 1)
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#define NEW_RESOURCE_OBJ_RETURN_NULL(type)\
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NEW_RESOURCE_ARRAY_RETURN_NULL(type, 1)
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#define NEW_C_HEAP_ARRAY3(type, size, memflags, pc, allocfail)\
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(type*) AllocateHeap((size) * sizeof(type), memflags, pc, allocfail)
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#define NEW_C_HEAP_ARRAY2(type, size, memflags, pc)\
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(type*) (AllocateHeap((size) * sizeof(type), memflags, pc))
|
|
|
|
#define NEW_C_HEAP_ARRAY(type, size, memflags)\
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|
(type*) (AllocateHeap((size) * sizeof(type), memflags))
|
|
|
|
#define NEW_C_HEAP_ARRAY2_RETURN_NULL(type, size, memflags, pc)\
|
|
NEW_C_HEAP_ARRAY3(type, (size), memflags, pc, AllocFailStrategy::RETURN_NULL)
|
|
|
|
#define NEW_C_HEAP_ARRAY_RETURN_NULL(type, size, memflags)\
|
|
NEW_C_HEAP_ARRAY3(type, (size), memflags, CURRENT_PC, AllocFailStrategy::RETURN_NULL)
|
|
|
|
#define REALLOC_C_HEAP_ARRAY(type, old, size, memflags)\
|
|
(type*) (ReallocateHeap((char*)(old), (size) * sizeof(type), memflags))
|
|
|
|
#define REALLOC_C_HEAP_ARRAY_RETURN_NULL(type, old, size, memflags)\
|
|
(type*) (ReallocateHeap((char*)(old), (size) * sizeof(type), memflags, AllocFailStrategy::RETURN_NULL))
|
|
|
|
#define FREE_C_HEAP_ARRAY(type, old) \
|
|
FreeHeap((char*)(old))
|
|
|
|
// allocate type in heap without calling ctor
|
|
#define NEW_C_HEAP_OBJ(type, memflags)\
|
|
NEW_C_HEAP_ARRAY(type, 1, memflags)
|
|
|
|
#define NEW_C_HEAP_OBJ_RETURN_NULL(type, memflags)\
|
|
NEW_C_HEAP_ARRAY_RETURN_NULL(type, 1, memflags)
|
|
|
|
// deallocate obj of type in heap without calling dtor
|
|
#define FREE_C_HEAP_OBJ(objname)\
|
|
FreeHeap((char*)objname);
|
|
|
|
|
|
//------------------------------ReallocMark---------------------------------
|
|
// Code which uses REALLOC_RESOURCE_ARRAY should check an associated
|
|
// ReallocMark, which is declared in the same scope as the reallocated
|
|
// pointer. Any operation that could __potentially__ cause a reallocation
|
|
// should check the ReallocMark.
|
|
class ReallocMark: public StackObj {
|
|
protected:
|
|
NOT_PRODUCT(int _nesting;)
|
|
|
|
public:
|
|
ReallocMark() PRODUCT_RETURN;
|
|
void check() PRODUCT_RETURN;
|
|
};
|
|
|
|
// Helper class to allocate arrays that may become large.
|
|
// Uses the OS malloc for allocations smaller than ArrayAllocatorMallocLimit
|
|
// and uses mapped memory for larger allocations.
|
|
// Most OS mallocs do something similar but Solaris malloc does not revert
|
|
// to mapped memory for large allocations. By default ArrayAllocatorMallocLimit
|
|
// is set so that we always use malloc except for Solaris where we set the
|
|
// limit to get mapped memory.
|
|
template <class E>
|
|
class ArrayAllocator : public AllStatic {
|
|
private:
|
|
static bool should_use_malloc(size_t length);
|
|
|
|
static E* allocate_malloc(size_t length, MEMFLAGS flags);
|
|
static E* allocate_mmap(size_t length, MEMFLAGS flags);
|
|
|
|
static void free_malloc(E* addr, size_t length);
|
|
static void free_mmap(E* addr, size_t length);
|
|
|
|
public:
|
|
static E* allocate(size_t length, MEMFLAGS flags);
|
|
static E* reallocate(E* old_addr, size_t old_length, size_t new_length, MEMFLAGS flags);
|
|
static void free(E* addr, size_t length);
|
|
};
|
|
|
|
// Uses mmaped memory for all allocations. All allocations are initially
|
|
// zero-filled. No pre-touching.
|
|
template <class E>
|
|
class MmapArrayAllocator : public AllStatic {
|
|
private:
|
|
static size_t size_for(size_t length);
|
|
|
|
public:
|
|
static E* allocate_or_null(size_t length, MEMFLAGS flags);
|
|
static E* allocate(size_t length, MEMFLAGS flags);
|
|
static void free(E* addr, size_t length);
|
|
};
|
|
|
|
// Uses malloc:ed memory for all allocations.
|
|
template <class E>
|
|
class MallocArrayAllocator : public AllStatic {
|
|
public:
|
|
static size_t size_for(size_t length);
|
|
|
|
static E* allocate(size_t length, MEMFLAGS flags);
|
|
static void free(E* addr);
|
|
};
|
|
|
|
#endif // SHARE_MEMORY_ALLOCATION_HPP
|