| /* |
| * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * 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_METASPACESHARED_HPP |
| #define SHARE_VM_MEMORY_METASPACESHARED_HPP |
| |
| #include "classfile/compactHashtable.hpp" |
| #include "memory/allocation.hpp" |
| #include "memory/memRegion.hpp" |
| #include "memory/virtualspace.hpp" |
| #include "utilities/exceptions.hpp" |
| #include "utilities/macros.hpp" |
| |
| #define DEFAULT_VTBL_LIST_SIZE (17) // number of entries in the shared space vtable list. |
| #define DEFAULT_VTBL_VIRTUALS_COUNT (200) // maximum number of virtual functions |
| // If virtual functions are added to Metadata, |
| // this number needs to be increased. Also, |
| // SharedMiscCodeSize will need to be increased. |
| // The following 2 sizes were based on |
| // MetaspaceShared::generate_vtable_methods() |
| #define DEFAULT_VTBL_METHOD_SIZE (16) // conservative size of the mov1 and jmp instructions |
| // for the x64 platform |
| #define DEFAULT_VTBL_COMMON_CODE_SIZE (1*K) // conservative size of the "common_code" for the x64 platform |
| |
| #define DEFAULT_SHARED_READ_WRITE_SIZE (NOT_LP64(12*M) LP64_ONLY(16*M)) |
| #define MIN_SHARED_READ_WRITE_SIZE (NOT_LP64(7*M) LP64_ONLY(12*M)) |
| |
| #define DEFAULT_SHARED_READ_ONLY_SIZE (NOT_LP64(12*M) LP64_ONLY(16*M)) |
| #define MIN_SHARED_READ_ONLY_SIZE (NOT_LP64(8*M) LP64_ONLY(9*M)) |
| |
| // the MIN_SHARED_MISC_DATA_SIZE and MIN_SHARED_MISC_CODE_SIZE estimates are based on |
| // MetaspaceShared::generate_vtable_methods(). |
| // The minimum size only accounts for the vtable methods. Any size less than the |
| // minimum required size would cause vm crash when allocating the vtable methods. |
| #define SHARED_MISC_SIZE_FOR(size) (DEFAULT_VTBL_VIRTUALS_COUNT*DEFAULT_VTBL_LIST_SIZE*size) |
| |
| #define DEFAULT_SHARED_MISC_DATA_SIZE (NOT_LP64(2*M) LP64_ONLY(4*M)) |
| #define MIN_SHARED_MISC_DATA_SIZE (SHARED_MISC_SIZE_FOR(sizeof(void*))) |
| |
| #define DEFAULT_SHARED_MISC_CODE_SIZE (120*K) |
| #define MIN_SHARED_MISC_CODE_SIZE (SHARED_MISC_SIZE_FOR(sizeof(void*))+SHARED_MISC_SIZE_FOR(DEFAULT_VTBL_METHOD_SIZE)+DEFAULT_VTBL_COMMON_CODE_SIZE) |
| |
| #define DEFAULT_COMBINED_SIZE (DEFAULT_SHARED_READ_WRITE_SIZE+DEFAULT_SHARED_READ_ONLY_SIZE+DEFAULT_SHARED_MISC_DATA_SIZE+DEFAULT_SHARED_MISC_CODE_SIZE) |
| |
| // the max size is the MAX size (ie. 0x7FFFFFFF) - the total size of |
| // the other 3 sections - page size (to avoid overflow in case the final |
| // size will get aligned up on page size) |
| #define SHARED_PAGE ((size_t)os::vm_page_size()) |
| #define MAX_SHARED_DELTA (0x7FFFFFFF) |
| #define MAX_SHARED_READ_WRITE_SIZE (MAX_SHARED_DELTA-(MIN_SHARED_READ_ONLY_SIZE+MIN_SHARED_MISC_DATA_SIZE+MIN_SHARED_MISC_CODE_SIZE)-SHARED_PAGE) |
| #define MAX_SHARED_READ_ONLY_SIZE (MAX_SHARED_DELTA-(MIN_SHARED_READ_WRITE_SIZE+MIN_SHARED_MISC_DATA_SIZE+MIN_SHARED_MISC_CODE_SIZE)-SHARED_PAGE) |
| #define MAX_SHARED_MISC_DATA_SIZE (MAX_SHARED_DELTA-(MIN_SHARED_READ_WRITE_SIZE+MIN_SHARED_READ_ONLY_SIZE+MIN_SHARED_MISC_CODE_SIZE)-SHARED_PAGE) |
| #define MAX_SHARED_MISC_CODE_SIZE (MAX_SHARED_DELTA-(MIN_SHARED_READ_WRITE_SIZE+MIN_SHARED_READ_ONLY_SIZE+MIN_SHARED_MISC_DATA_SIZE)-SHARED_PAGE) |
| |
| #define LargeSharedArchiveSize (300*M) |
| #define HugeSharedArchiveSize (800*M) |
| #define ReadOnlyRegionPercentage 0.4 |
| #define ReadWriteRegionPercentage 0.55 |
| #define MiscDataRegionPercentage 0.03 |
| #define MiscCodeRegionPercentage 0.02 |
| #define LargeThresholdClassCount 5000 |
| #define HugeThresholdClassCount 40000 |
| |
| #define SET_ESTIMATED_SIZE(type, region) \ |
| Shared ##region## Size = FLAG_IS_DEFAULT(Shared ##region## Size) ? \ |
| (uintx)(type ## SharedArchiveSize * region ## RegionPercentage) : Shared ## region ## Size |
| |
| class FileMapInfo; |
| |
| class MetaspaceSharedStats VALUE_OBJ_CLASS_SPEC { |
| public: |
| MetaspaceSharedStats() { |
| memset(this, 0, sizeof(*this)); |
| } |
| CompactHashtableStats symbol; |
| CompactHashtableStats string; |
| }; |
| |
| class SharedMiscRegion VALUE_OBJ_CLASS_SPEC { |
| private: |
| VirtualSpace _vs; |
| char* _alloc_top; |
| SharedSpaceType _space_type; |
| |
| public: |
| void initialize(ReservedSpace rs, size_t committed_byte_size, SharedSpaceType space_type); |
| VirtualSpace* virtual_space() { |
| return &_vs; |
| } |
| char* low() const { |
| return _vs.low(); |
| } |
| char* alloc_top() const { |
| return _alloc_top; |
| } |
| char* alloc(size_t num_bytes) NOT_CDS_RETURN_(NULL); |
| }; |
| |
| // Class Data Sharing Support |
| class MetaspaceShared : AllStatic { |
| |
| // CDS support |
| static ReservedSpace* _shared_rs; |
| static int _max_alignment; |
| static MetaspaceSharedStats _stats; |
| static bool _link_classes_made_progress; |
| static bool _check_classes_made_progress; |
| static bool _has_error_classes; |
| static bool _archive_loading_failed; |
| |
| // Used only during dumping. |
| static SharedMiscRegion _md; |
| static SharedMiscRegion _mc; |
| public: |
| enum { |
| vtbl_list_size = DEFAULT_VTBL_LIST_SIZE, |
| num_virtuals = DEFAULT_VTBL_VIRTUALS_COUNT, |
| vtbl_method_size = DEFAULT_VTBL_METHOD_SIZE, |
| vtbl_common_code_size = DEFAULT_VTBL_COMMON_CODE_SIZE |
| }; |
| |
| enum { |
| ro = 0, // read-only shared space in the heap |
| rw = 1, // read-write shared space in the heap |
| md = 2, // miscellaneous data for initializing tables, etc. |
| mc = 3, // miscellaneous code - vtable replacement. |
| max_strings = 2, // max number of string regions in string space |
| num_non_strings = 4, // number of non-string regions |
| first_string = num_non_strings, // index of first string region |
| n_regions = max_strings + num_non_strings // total number of regions |
| }; |
| |
| // Accessor functions to save shared space created for metadata, which has |
| // extra space allocated at the end for miscellaneous data and code. |
| static void set_max_alignment(int alignment) { |
| CDS_ONLY(_max_alignment = alignment); |
| } |
| |
| static int max_alignment() { |
| CDS_ONLY(return _max_alignment); |
| NOT_CDS(return 0); |
| } |
| |
| static void prepare_for_dumping() NOT_CDS_RETURN; |
| static void preload_and_dump(TRAPS) NOT_CDS_RETURN; |
| static int preload_and_dump(const char * class_list_path, |
| GrowableArray<Klass*>* class_promote_order, |
| TRAPS) NOT_CDS_RETURN_(0); |
| |
| static ReservedSpace* shared_rs() { |
| CDS_ONLY(return _shared_rs); |
| NOT_CDS(return NULL); |
| } |
| |
| static void initialize_shared_rs(ReservedSpace* rs) NOT_CDS_RETURN; |
| |
| static void set_archive_loading_failed() { |
| _archive_loading_failed = true; |
| } |
| static bool map_shared_spaces(FileMapInfo* mapinfo) NOT_CDS_RETURN_(false); |
| static void initialize_shared_spaces() NOT_CDS_RETURN; |
| static void fixup_shared_string_regions() NOT_CDS_RETURN; |
| |
| // Return true if given address is in the mapped shared space. |
| static bool is_in_shared_space(const void* p) NOT_CDS_RETURN_(false); |
| |
| static bool is_string_region(int idx) NOT_CDS_RETURN_(false); |
| |
| static void generate_vtable_methods(void** vtbl_list, |
| void** vtable, |
| char** md_top, char* md_end, |
| char** mc_top, char* mc_end); |
| static void serialize(SerializeClosure* sc); |
| |
| static MetaspaceSharedStats* stats() { |
| return &_stats; |
| } |
| |
| // JVM/TI RedefineClasses() support: |
| // Remap the shared readonly space to shared readwrite, private if |
| // sharing is enabled. Simply returns true if sharing is not enabled |
| // or if the remapping has already been done by a prior call. |
| static bool remap_shared_readonly_as_readwrite() NOT_CDS_RETURN_(true); |
| |
| static void print_shared_spaces(); |
| |
| static bool try_link_class(InstanceKlass* ik, TRAPS); |
| static void link_one_shared_class(Klass* obj, TRAPS); |
| static void check_one_shared_class(Klass* obj); |
| static void check_shared_class_loader_type(Klass* obj); |
| static void link_and_cleanup_shared_classes(TRAPS); |
| |
| static int count_class(const char* classlist_file); |
| static void estimate_regions_size() NOT_CDS_RETURN; |
| |
| // Allocate a block of memory from the "mc" or "md" regions. |
| static char* misc_code_space_alloc(size_t num_bytes) { return _mc.alloc(num_bytes); } |
| static char* misc_data_space_alloc(size_t num_bytes) { return _md.alloc(num_bytes); } |
| |
| static SharedMiscRegion* misc_code_region() { |
| assert(DumpSharedSpaces, "used during dumping only"); |
| return &_mc; |
| } |
| static SharedMiscRegion* misc_data_region() { |
| assert(DumpSharedSpaces, "used during dumping only"); |
| return &_md; |
| } |
| }; |
| #endif // SHARE_VM_MEMORY_METASPACESHARED_HPP |