| /* |
| * Copyright (c) 2012, 2020, 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_MEMORY_METASPACESHARED_HPP |
| #define SHARE_MEMORY_METASPACESHARED_HPP |
| |
| #include "classfile/compactHashtable.hpp" |
| #include "memory/allocation.hpp" |
| #include "memory/memRegion.hpp" |
| #include "memory/virtualspace.hpp" |
| #include "oops/oop.hpp" |
| #include "utilities/exceptions.hpp" |
| #include "utilities/macros.hpp" |
| #include "utilities/resourceHash.hpp" |
| |
| #define MAX_SHARED_DELTA (0x7FFFFFFF) |
| |
| class outputStream; |
| class FileMapInfo; |
| class CHeapBitMap; |
| struct ArchiveHeapOopmapInfo; |
| |
| enum MapArchiveResult { |
| MAP_ARCHIVE_SUCCESS, |
| MAP_ARCHIVE_MMAP_FAILURE, |
| MAP_ARCHIVE_OTHER_FAILURE |
| }; |
| |
| class MetaspaceSharedStats { |
| public: |
| MetaspaceSharedStats() { |
| memset(this, 0, sizeof(*this)); |
| } |
| CompactHashtableStats symbol; |
| CompactHashtableStats string; |
| }; |
| |
| #if INCLUDE_CDS |
| class DumpRegion { |
| private: |
| const char* _name; |
| char* _base; |
| char* _top; |
| char* _end; |
| bool _is_packed; |
| ReservedSpace* _rs; |
| VirtualSpace* _vs; |
| |
| public: |
| DumpRegion(const char* name) : _name(name), _base(NULL), _top(NULL), _end(NULL), _is_packed(false) {} |
| |
| char* expand_top_to(char* newtop); |
| char* allocate(size_t num_bytes, size_t alignment=BytesPerWord); |
| |
| void append_intptr_t(intptr_t n, bool need_to_mark = false); |
| |
| char* base() const { return _base; } |
| char* top() const { return _top; } |
| char* end() const { return _end; } |
| size_t reserved() const { return _end - _base; } |
| size_t used() const { return _top - _base; } |
| bool is_packed() const { return _is_packed; } |
| bool is_allocatable() const { |
| return !is_packed() && _base != NULL; |
| } |
| |
| void print(size_t total_bytes) const; |
| void print_out_of_space_msg(const char* failing_region, size_t needed_bytes); |
| |
| void init(ReservedSpace* rs, VirtualSpace* vs); |
| |
| void pack(DumpRegion* next = NULL); |
| |
| bool contains(char* p) { |
| return base() <= p && p < top(); |
| } |
| }; |
| |
| // Closure for serializing initialization data out to a data area to be |
| // written to the shared file. |
| |
| class WriteClosure : public SerializeClosure { |
| private: |
| DumpRegion* _dump_region; |
| |
| public: |
| WriteClosure(DumpRegion* r) { |
| _dump_region = r; |
| } |
| |
| void do_ptr(void** p) { |
| _dump_region->append_intptr_t((intptr_t)*p, true); |
| } |
| |
| void do_u4(u4* p) { |
| _dump_region->append_intptr_t((intptr_t)(*p)); |
| } |
| |
| void do_bool(bool *p) { |
| _dump_region->append_intptr_t((intptr_t)(*p)); |
| } |
| |
| void do_tag(int tag) { |
| _dump_region->append_intptr_t((intptr_t)tag); |
| } |
| |
| void do_oop(oop* o); |
| |
| void do_region(u_char* start, size_t size); |
| |
| bool reading() const { return false; } |
| }; |
| |
| // Closure for serializing initialization data in from a data area |
| // (ptr_array) read from the shared file. |
| |
| class ReadClosure : public SerializeClosure { |
| private: |
| intptr_t** _ptr_array; |
| |
| inline intptr_t nextPtr() { |
| return *(*_ptr_array)++; |
| } |
| |
| public: |
| ReadClosure(intptr_t** ptr_array) { _ptr_array = ptr_array; } |
| |
| void do_ptr(void** p); |
| |
| void do_u4(u4* p); |
| |
| void do_bool(bool *p); |
| |
| void do_tag(int tag); |
| |
| void do_oop(oop *p); |
| |
| void do_region(u_char* start, size_t size); |
| |
| bool reading() const { return true; } |
| }; |
| |
| #endif // INCLUDE_CDS |
| |
| // Class Data Sharing Support |
| class MetaspaceShared : AllStatic { |
| |
| // CDS support |
| |
| // Note: _shared_rs and _symbol_rs are only used at dump time. |
| static ReservedSpace _shared_rs; |
| static VirtualSpace _shared_vs; |
| static ReservedSpace _symbol_rs; |
| static VirtualSpace _symbol_vs; |
| static int _max_alignment; |
| static MetaspaceSharedStats _stats; |
| static bool _has_error_classes; |
| static bool _archive_loading_failed; |
| static bool _remapped_readwrite; |
| static address _i2i_entry_code_buffers; |
| static size_t _i2i_entry_code_buffers_size; |
| static size_t _core_spaces_size; |
| static void* _shared_metaspace_static_top; |
| static intx _relocation_delta; |
| static char* _requested_base_address; |
| public: |
| enum { |
| // core archive spaces |
| mc = 0, // miscellaneous code for method trampolines |
| rw = 1, // read-write shared space in the heap |
| ro = 2, // read-only shared space in the heap |
| bm = 3, // relocation bitmaps (freed after file mapping is finished) |
| num_core_region = 3, |
| num_non_heap_spaces = 4, |
| |
| // mapped java heap regions |
| first_closed_archive_heap_region = bm + 1, |
| max_closed_archive_heap_region = 2, |
| last_closed_archive_heap_region = first_closed_archive_heap_region + max_closed_archive_heap_region - 1, |
| first_open_archive_heap_region = last_closed_archive_heap_region + 1, |
| max_open_archive_heap_region = 2, |
| last_open_archive_heap_region = first_open_archive_heap_region + max_open_archive_heap_region - 1, |
| |
| last_valid_region = last_open_archive_heap_region, |
| n_regions = last_valid_region + 1 // total number of regions |
| }; |
| |
| static void prepare_for_dumping() NOT_CDS_RETURN; |
| static void preload_and_dump(TRAPS) NOT_CDS_RETURN; |
| static int preload_classes(const char * class_list_path, |
| TRAPS) NOT_CDS_RETURN_(0); |
| |
| static GrowableArray<Klass*>* collected_klasses(); |
| |
| static ReservedSpace* shared_rs() { |
| CDS_ONLY(return &_shared_rs); |
| NOT_CDS(return NULL); |
| } |
| |
| static Symbol* symbol_rs_base() { |
| return (Symbol*)_symbol_rs.base(); |
| } |
| |
| static void set_shared_rs(ReservedSpace rs) { |
| CDS_ONLY(_shared_rs = rs); |
| } |
| |
| static void commit_to(ReservedSpace* rs, VirtualSpace* vs, char* newtop) NOT_CDS_RETURN; |
| static void initialize_dumptime_shared_and_meta_spaces() NOT_CDS_RETURN; |
| static void initialize_runtime_shared_and_meta_spaces() NOT_CDS_RETURN; |
| static void post_initialize(TRAPS) NOT_CDS_RETURN; |
| |
| static void print_on(outputStream* st); |
| |
| // Delta of this object from SharedBaseAddress |
| static uintx object_delta_uintx(void* obj); |
| |
| static u4 object_delta_u4(void* obj) { |
| // offset is guaranteed to be less than MAX_SHARED_DELTA in DumpRegion::expand_top_to() |
| uintx deltax = object_delta_uintx(obj); |
| guarantee(deltax <= MAX_SHARED_DELTA, "must be 32-bit offset"); |
| return (u4)deltax; |
| } |
| |
| static void set_archive_loading_failed() { |
| _archive_loading_failed = true; |
| } |
| static bool is_in_output_space(void* ptr) { |
| assert(DumpSharedSpaces, "must be"); |
| return shared_rs()->contains(ptr); |
| } |
| |
| static bool map_shared_spaces(FileMapInfo* mapinfo) NOT_CDS_RETURN_(false); |
| static void initialize_shared_spaces() NOT_CDS_RETURN; |
| |
| // Return true if given address is in the shared metaspace regions (i.e., excluding any |
| // mapped shared heap regions.) |
| static bool is_in_shared_metaspace(const void* p) { |
| return MetaspaceObj::is_shared((const MetaspaceObj*)p); |
| } |
| |
| static address shared_metaspace_top() { |
| return (address)MetaspaceObj::shared_metaspace_top(); |
| } |
| |
| static void set_shared_metaspace_range(void* base, void *static_top, void* top) NOT_CDS_RETURN; |
| |
| // Return true if given address is in the shared region corresponding to the idx |
| static bool is_in_shared_region(const void* p, int idx) NOT_CDS_RETURN_(false); |
| |
| static bool is_in_trampoline_frame(address addr) NOT_CDS_RETURN_(false); |
| |
| static bool is_shared_dynamic(void* p) NOT_CDS_RETURN_(false); |
| |
| static char* allocate_cpp_vtable_clones(); |
| static void clone_cpp_vtables(intptr_t* p); |
| static void zero_cpp_vtable_clones_for_writing(); |
| static void patch_cpp_vtable_pointers(); |
| static void serialize_cloned_cpp_vtptrs(SerializeClosure* sc); |
| |
| static bool is_valid_shared_method(const Method* m) NOT_CDS_RETURN_(false); |
| static void serialize(SerializeClosure* sc) NOT_CDS_RETURN; |
| |
| static MetaspaceSharedStats* stats() { |
| return &_stats; |
| } |
| |
| static void report_out_of_space(const char* name, size_t needed_bytes); |
| |
| // 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 bool remapped_readwrite() { |
| CDS_ONLY(return _remapped_readwrite); |
| NOT_CDS(return false); |
| } |
| |
| static bool try_link_class(InstanceKlass* ik, TRAPS); |
| static void link_and_cleanup_shared_classes(TRAPS) NOT_CDS_RETURN; |
| |
| #if INCLUDE_CDS |
| static size_t reserved_space_alignment(); |
| static void init_shared_dump_space(DumpRegion* first_space); |
| static DumpRegion* misc_code_dump_space(); |
| static DumpRegion* read_write_dump_space(); |
| static DumpRegion* read_only_dump_space(); |
| static void pack_dump_space(DumpRegion* current, DumpRegion* next, |
| ReservedSpace* rs); |
| |
| static void rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread* thread, InstanceKlass* ik); |
| #endif |
| |
| // Allocate a block of memory from the temporary "symbol" region. |
| static char* symbol_space_alloc(size_t num_bytes); |
| |
| // Allocate a block of memory from the "mc" or "ro" regions. |
| static char* misc_code_space_alloc(size_t num_bytes); |
| static char* read_only_space_alloc(size_t num_bytes); |
| |
| template <typename T> |
| static Array<T>* new_ro_array(int length) { |
| #if INCLUDE_CDS |
| size_t byte_size = Array<T>::byte_sizeof(length, sizeof(T)); |
| Array<T>* array = (Array<T>*)read_only_space_alloc(byte_size); |
| array->initialize(length); |
| return array; |
| #else |
| return NULL; |
| #endif |
| } |
| |
| template <typename T> |
| static size_t ro_array_bytesize(int length) { |
| size_t byte_size = Array<T>::byte_sizeof(length, sizeof(T)); |
| return align_up(byte_size, BytesPerWord); |
| } |
| |
| static address i2i_entry_code_buffers(size_t total_size); |
| |
| static address i2i_entry_code_buffers() { |
| return _i2i_entry_code_buffers; |
| } |
| static size_t i2i_entry_code_buffers_size() { |
| return _i2i_entry_code_buffers_size; |
| } |
| static void relocate_klass_ptr(oop o); |
| |
| static Klass* get_relocated_klass(Klass *k, bool is_final=false); |
| |
| static void allocate_cloned_cpp_vtptrs(); |
| static intptr_t* fix_cpp_vtable_for_dynamic_archive(MetaspaceObj::Type msotype, address obj); |
| static void initialize_ptr_marker(CHeapBitMap* ptrmap); |
| |
| // This is the base address as specified by -XX:SharedBaseAddress during -Xshare:dump. |
| // Both the base/top archives are written using this as their base address. |
| static char* requested_base_address() { |
| return _requested_base_address; |
| } |
| |
| // Non-zero if the archive(s) need to be mapped a non-default location due to ASLR. |
| static intx relocation_delta() { return _relocation_delta; } |
| static intx final_delta(); |
| static bool use_windows_memory_mapping() { |
| const bool is_windows = (NOT_WINDOWS(false) WINDOWS_ONLY(true)); |
| //const bool is_windows = true; // enable this to allow testing the windows mmap semantics on Linux, etc. |
| return is_windows; |
| } |
| |
| static void write_core_archive_regions(FileMapInfo* mapinfo, |
| GrowableArray<ArchiveHeapOopmapInfo>* closed_oopmaps, |
| GrowableArray<ArchiveHeapOopmapInfo>* open_oopmaps); |
| private: |
| #if INCLUDE_CDS |
| static void write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, |
| bool read_only, bool allow_exec); |
| #endif |
| static void read_extra_data(const char* filename, TRAPS) NOT_CDS_RETURN; |
| static FileMapInfo* open_static_archive(); |
| static FileMapInfo* open_dynamic_archive(); |
| // use_requested_addr: If true (default), attempt to map at the address the |
| static MapArchiveResult map_archives(FileMapInfo* static_mapinfo, FileMapInfo* dynamic_mapinfo, |
| bool use_requested_addr); |
| static char* reserve_address_space_for_archives(FileMapInfo* static_mapinfo, |
| FileMapInfo* dynamic_mapinfo, |
| bool use_archive_base_addr, |
| ReservedSpace& archive_space_rs, |
| ReservedSpace& class_space_rs); |
| static void release_reserved_spaces(ReservedSpace& archive_space_rs, |
| ReservedSpace& class_space_rs); |
| static MapArchiveResult map_archive(FileMapInfo* mapinfo, char* mapped_base_address, ReservedSpace rs); |
| static void unmap_archive(FileMapInfo* mapinfo); |
| }; |
| #endif // SHARE_MEMORY_METASPACESHARED_HPP |