Mercurial > hg > truffle
view src/share/vm/memory/metaspace.hpp @ 15713:b68907673c8e
[inlining] shorter and equally informative, logNotInlined vs logNotInlinedMethod
author | Miguel Garcia <miguel.m.garcia@oracle.com> |
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date | Fri, 16 May 2014 15:28:00 +0200 |
parents | 4ca6dc0799b6 |
children | 52b4284cb496 |
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/* * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_MEMORY_METASPACE_HPP #define SHARE_VM_MEMORY_METASPACE_HPP #include "memory/allocation.hpp" #include "memory/memRegion.hpp" #include "runtime/virtualspace.hpp" #include "utilities/exceptions.hpp" // Metaspace // // Metaspaces are Arenas for the VM's metadata. // They are allocated one per class loader object, and one for the null // bootstrap class loader // Eventually for bootstrap loader we'll have a read-only section and read-write // to write for DumpSharedSpaces and read for UseSharedSpaces // // block X ---+ +-------------------+ // | | Virtualspace | // | | | // | | | // | |-------------------| // | || Chunk | // | || | // | ||---------- | // +------>||| block 0 | | // ||---------- | // ||| block 1 | | // ||---------- | // || | // |-------------------| // | | // | | // +-------------------+ // class ChunkManager; class ClassLoaderData; class Metablock; class Metachunk; class MetaWord; class Mutex; class outputStream; class SpaceManager; class VirtualSpaceList; // Metaspaces each have a SpaceManager and allocations // are done by the SpaceManager. Allocations are done // out of the current Metachunk. When the current Metachunk // is exhausted, the SpaceManager gets a new one from // the current VirtualSpace. When the VirtualSpace is exhausted // the SpaceManager gets a new one. The SpaceManager // also manages freelists of available Chunks. // // Currently the space manager maintains the list of // virtual spaces and the list of chunks in use. Its // allocate() method returns a block for use as a // quantum of metadata. class Metaspace : public CHeapObj<mtClass> { friend class VMStructs; friend class SpaceManager; friend class VM_CollectForMetadataAllocation; friend class MetaspaceGC; friend class MetaspaceAux; public: enum MetadataType { ClassType, NonClassType, MetadataTypeCount }; enum MetaspaceType { StandardMetaspaceType, BootMetaspaceType, ROMetaspaceType, ReadWriteMetaspaceType, AnonymousMetaspaceType, ReflectionMetaspaceType }; private: void initialize(Mutex* lock, MetaspaceType type); // Get the first chunk for a Metaspace. Used for // special cases such as the boot class loader, reflection // class loader and anonymous class loader. Metachunk* get_initialization_chunk(MetadataType mdtype, size_t chunk_word_size, size_t chunk_bunch); // Align up the word size to the allocation word size static size_t align_word_size_up(size_t); // Aligned size of the metaspace. static size_t _compressed_class_space_size; static size_t compressed_class_space_size() { return _compressed_class_space_size; } static void set_compressed_class_space_size(size_t size) { _compressed_class_space_size = size; } static size_t _first_chunk_word_size; static size_t _first_class_chunk_word_size; static size_t _commit_alignment; static size_t _reserve_alignment; SpaceManager* _vsm; SpaceManager* vsm() const { return _vsm; } SpaceManager* _class_vsm; SpaceManager* class_vsm() const { return _class_vsm; } // Allocate space for metadata of type mdtype. This is space // within a Metachunk and is used by // allocate(ClassLoaderData*, size_t, bool, MetadataType, TRAPS) MetaWord* allocate(size_t word_size, MetadataType mdtype); // Virtual Space lists for both classes and other metadata static VirtualSpaceList* _space_list; static VirtualSpaceList* _class_space_list; static ChunkManager* _chunk_manager_metadata; static ChunkManager* _chunk_manager_class; public: static VirtualSpaceList* space_list() { return _space_list; } static VirtualSpaceList* class_space_list() { return _class_space_list; } static VirtualSpaceList* get_space_list(MetadataType mdtype) { assert(mdtype != MetadataTypeCount, "MetadaTypeCount can't be used as mdtype"); return mdtype == ClassType ? class_space_list() : space_list(); } static ChunkManager* chunk_manager_metadata() { return _chunk_manager_metadata; } static ChunkManager* chunk_manager_class() { return _chunk_manager_class; } static ChunkManager* get_chunk_manager(MetadataType mdtype) { assert(mdtype != MetadataTypeCount, "MetadaTypeCount can't be used as mdtype"); return mdtype == ClassType ? chunk_manager_class() : chunk_manager_metadata(); } private: // This is used by DumpSharedSpaces only, where only _vsm is used. So we will // maintain a single list for now. void record_allocation(void* ptr, MetaspaceObj::Type type, size_t word_size); #ifdef _LP64 static void set_narrow_klass_base_and_shift(address metaspace_base, address cds_base); // Returns true if can use CDS with metaspace allocated as specified address. static bool can_use_cds_with_metaspace_addr(char* metaspace_base, address cds_base); static void allocate_metaspace_compressed_klass_ptrs(char* requested_addr, address cds_base); static void initialize_class_space(ReservedSpace rs); #endif class AllocRecord : public CHeapObj<mtClass> { public: AllocRecord(address ptr, MetaspaceObj::Type type, int byte_size) : _next(NULL), _ptr(ptr), _type(type), _byte_size(byte_size) {} AllocRecord *_next; address _ptr; MetaspaceObj::Type _type; int _byte_size; }; AllocRecord * _alloc_record_head; AllocRecord * _alloc_record_tail; size_t class_chunk_size(size_t word_size); public: Metaspace(Mutex* lock, MetaspaceType type); ~Metaspace(); static void ergo_initialize(); static void global_initialize(); static size_t first_chunk_word_size() { return _first_chunk_word_size; } static size_t first_class_chunk_word_size() { return _first_class_chunk_word_size; } static size_t reserve_alignment() { return _reserve_alignment; } static size_t reserve_alignment_words() { return _reserve_alignment / BytesPerWord; } static size_t commit_alignment() { return _commit_alignment; } static size_t commit_alignment_words() { return _commit_alignment / BytesPerWord; } char* bottom() const; size_t used_words_slow(MetadataType mdtype) const; size_t free_words_slow(MetadataType mdtype) const; size_t capacity_words_slow(MetadataType mdtype) const; size_t used_bytes_slow(MetadataType mdtype) const; size_t capacity_bytes_slow(MetadataType mdtype) const; static MetaWord* allocate(ClassLoaderData* loader_data, size_t word_size, bool read_only, MetaspaceObj::Type type, TRAPS); void deallocate(MetaWord* ptr, size_t byte_size, bool is_class); MetaWord* expand_and_allocate(size_t size, MetadataType mdtype); static bool contains(const void *ptr); void dump(outputStream* const out) const; // Free empty virtualspaces static void purge(MetadataType mdtype); static void purge(); static void report_metadata_oome(ClassLoaderData* loader_data, size_t word_size, MetadataType mdtype, TRAPS); void print_on(outputStream* st) const; // Debugging support void verify(); class AllocRecordClosure : public StackObj { public: virtual void doit(address ptr, MetaspaceObj::Type type, int byte_size) = 0; }; void iterate(AllocRecordClosure *closure); // Return TRUE only if UseCompressedClassPointers is True and DumpSharedSpaces is False. static bool using_class_space() { return NOT_LP64(false) LP64_ONLY(UseCompressedClassPointers && !DumpSharedSpaces); } static bool is_class_space_allocation(MetadataType mdType) { return mdType == ClassType && using_class_space(); } }; class MetaspaceAux : AllStatic { static size_t free_chunks_total_words(Metaspace::MetadataType mdtype); // These methods iterate over the classloader data graph // for the given Metaspace type. These are slow. static size_t used_bytes_slow(Metaspace::MetadataType mdtype); static size_t free_bytes_slow(Metaspace::MetadataType mdtype); static size_t capacity_bytes_slow(Metaspace::MetadataType mdtype); static size_t capacity_bytes_slow(); // Running sum of space in all Metachunks that has been // allocated to a Metaspace. This is used instead of // iterating over all the classloaders. One for each // type of Metadata static size_t _allocated_capacity_words[Metaspace:: MetadataTypeCount]; // Running sum of space in all Metachunks that have // are being used for metadata. One for each // type of Metadata. static size_t _allocated_used_words[Metaspace:: MetadataTypeCount]; public: // Decrement and increment _allocated_capacity_words static void dec_capacity(Metaspace::MetadataType type, size_t words); static void inc_capacity(Metaspace::MetadataType type, size_t words); // Decrement and increment _allocated_used_words static void dec_used(Metaspace::MetadataType type, size_t words); static void inc_used(Metaspace::MetadataType type, size_t words); // Total of space allocated to metadata in all Metaspaces. // This sums the space used in each Metachunk by // iterating over the classloader data graph static size_t used_bytes_slow() { return used_bytes_slow(Metaspace::ClassType) + used_bytes_slow(Metaspace::NonClassType); } // Used by MetaspaceCounters static size_t free_chunks_total_words(); static size_t free_chunks_total_bytes(); static size_t free_chunks_total_bytes(Metaspace::MetadataType mdtype); static size_t allocated_capacity_words(Metaspace::MetadataType mdtype) { return _allocated_capacity_words[mdtype]; } static size_t allocated_capacity_words() { return allocated_capacity_words(Metaspace::NonClassType) + allocated_capacity_words(Metaspace::ClassType); } static size_t allocated_capacity_bytes(Metaspace::MetadataType mdtype) { return allocated_capacity_words(mdtype) * BytesPerWord; } static size_t allocated_capacity_bytes() { return allocated_capacity_words() * BytesPerWord; } static size_t allocated_used_words(Metaspace::MetadataType mdtype) { return _allocated_used_words[mdtype]; } static size_t allocated_used_words() { return allocated_used_words(Metaspace::NonClassType) + allocated_used_words(Metaspace::ClassType); } static size_t allocated_used_bytes(Metaspace::MetadataType mdtype) { return allocated_used_words(mdtype) * BytesPerWord; } static size_t allocated_used_bytes() { return allocated_used_words() * BytesPerWord; } static size_t free_bytes(); static size_t free_bytes(Metaspace::MetadataType mdtype); static size_t reserved_bytes(Metaspace::MetadataType mdtype); static size_t reserved_bytes() { return reserved_bytes(Metaspace::ClassType) + reserved_bytes(Metaspace::NonClassType); } static size_t committed_bytes(Metaspace::MetadataType mdtype); static size_t committed_bytes() { return committed_bytes(Metaspace::ClassType) + committed_bytes(Metaspace::NonClassType); } static size_t min_chunk_size_words(); static size_t min_chunk_size_bytes() { return min_chunk_size_words() * BytesPerWord; } // Print change in used metadata. static void print_metaspace_change(size_t prev_metadata_used); static void print_on(outputStream * out); static void print_on(outputStream * out, Metaspace::MetadataType mdtype); static void print_class_waste(outputStream* out); static void print_waste(outputStream* out); static void dump(outputStream* out); static void verify_free_chunks(); // Checks that the values returned by allocated_capacity_bytes() and // capacity_bytes_slow() are the same. static void verify_capacity(); static void verify_used(); static void verify_metrics(); }; // Metaspace are deallocated when their class loader are GC'ed. // This class implements a policy for inducing GC's to recover // Metaspaces. class MetaspaceGC : AllStatic { // The current high-water-mark for inducing a GC. // When committed memory of all metaspaces reaches this value, // a GC is induced and the value is increased. Size is in bytes. static volatile intptr_t _capacity_until_GC; // For a CMS collection, signal that a concurrent collection should // be started. static bool _should_concurrent_collect; static uint _shrink_factor; static size_t shrink_factor() { return _shrink_factor; } void set_shrink_factor(uint v) { _shrink_factor = v; } public: static void initialize() { _capacity_until_GC = MetaspaceSize; } static size_t capacity_until_GC(); static size_t inc_capacity_until_GC(size_t v); static size_t dec_capacity_until_GC(size_t v); static bool should_concurrent_collect() { return _should_concurrent_collect; } static void set_should_concurrent_collect(bool v) { _should_concurrent_collect = v; } // The amount to increase the high-water-mark (_capacity_until_GC) static size_t delta_capacity_until_GC(size_t bytes); // Tells if we have can expand metaspace without hitting set limits. static bool can_expand(size_t words, bool is_class); // Returns amount that we can expand without hitting a GC, // measured in words. static size_t allowed_expansion(); // Calculate the new high-water mark at which to induce // a GC. static void compute_new_size(); }; #endif // SHARE_VM_MEMORY_METASPACE_HPP