1837 lines
74 KiB
C++
1837 lines
74 KiB
C++
/*
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* Copyright (c) 2012, 2020, 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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#include "precompiled.hpp"
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#include "classfile/classLoaderDataGraph.hpp"
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#include "classfile/classLoaderDataShared.hpp"
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#include "classfile/classListParser.hpp"
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#include "classfile/classLoaderExt.hpp"
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#include "classfile/javaClasses.inline.hpp"
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#include "classfile/lambdaFormInvokers.hpp"
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#include "classfile/loaderConstraints.hpp"
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#include "classfile/placeholders.hpp"
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#include "classfile/symbolTable.hpp"
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#include "classfile/stringTable.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "classfile/systemDictionaryShared.hpp"
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#include "code/codeCache.hpp"
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#include "interpreter/abstractInterpreter.hpp"
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#include "interpreter/bytecodeStream.hpp"
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#include "interpreter/bytecodes.hpp"
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#include "logging/log.hpp"
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#include "logging/logMessage.hpp"
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#include "memory/archiveBuilder.hpp"
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#include "memory/archiveUtils.inline.hpp"
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#include "memory/cppVtables.hpp"
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#include "memory/dumpAllocStats.hpp"
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#include "memory/dynamicArchive.hpp"
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#include "memory/filemap.hpp"
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#include "memory/heapShared.inline.hpp"
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#include "memory/metaspace.hpp"
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#include "memory/metaspaceClosure.hpp"
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#include "memory/metaspaceShared.hpp"
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#include "memory/resourceArea.hpp"
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#include "memory/universe.hpp"
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#include "oops/compressedOops.inline.hpp"
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#include "oops/instanceMirrorKlass.hpp"
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#include "oops/objArrayOop.hpp"
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#include "oops/oop.inline.hpp"
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#include "oops/oopHandle.hpp"
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#include "prims/jvmtiExport.hpp"
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#include "runtime/handles.inline.hpp"
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#include "runtime/os.hpp"
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#include "runtime/safepointVerifiers.hpp"
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#include "runtime/sharedRuntime.hpp"
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#include "runtime/timerTrace.hpp"
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#include "runtime/vmThread.hpp"
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#include "runtime/vmOperations.hpp"
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#include "utilities/align.hpp"
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#include "utilities/bitMap.inline.hpp"
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#include "utilities/ostream.hpp"
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#include "utilities/defaultStream.hpp"
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#include "utilities/hashtable.inline.hpp"
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#if INCLUDE_G1GC
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#include "gc/g1/g1CollectedHeap.inline.hpp"
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#endif
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ReservedSpace MetaspaceShared::_shared_rs;
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VirtualSpace MetaspaceShared::_shared_vs;
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ReservedSpace MetaspaceShared::_symbol_rs;
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VirtualSpace MetaspaceShared::_symbol_vs;
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MetaspaceSharedStats MetaspaceShared::_stats;
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bool MetaspaceShared::_has_error_classes;
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bool MetaspaceShared::_archive_loading_failed = false;
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bool MetaspaceShared::_remapped_readwrite = false;
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address MetaspaceShared::_i2i_entry_code_buffers = NULL;
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void* MetaspaceShared::_shared_metaspace_static_top = NULL;
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intx MetaspaceShared::_relocation_delta;
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char* MetaspaceShared::_requested_base_address;
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bool MetaspaceShared::_use_optimized_module_handling = true;
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bool MetaspaceShared::_use_full_module_graph = true;
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// The CDS archive is divided into the following regions:
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// mc - misc code (the method entry trampolines, c++ vtables)
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// rw - read-write metadata
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// ro - read-only metadata and read-only tables
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//
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// ca0 - closed archive heap space #0
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// ca1 - closed archive heap space #1 (may be empty)
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// oa0 - open archive heap space #0
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// oa1 - open archive heap space #1 (may be empty)
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//
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// The mc, rw, and ro regions are linearly allocated, starting from
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// SharedBaseAddress, in the order of mc->rw->ro. The size of these 3 regions
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// are page-aligned, and there's no gap between any consecutive regions.
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//
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// These 3 regions are populated in the following steps:
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// [1] All classes are loaded in MetaspaceShared::preload_classes(). All metadata are
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// temporarily allocated outside of the shared regions. Only the method entry
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// trampolines are written into the mc region.
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// [2] C++ vtables are copied into the mc region.
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// [3] ArchiveBuilder copies RW metadata into the rw region.
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// [4] ArchiveBuilder copies RO metadata into the ro region.
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// [5] SymbolTable, StringTable, SystemDictionary, and a few other read-only data
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// are copied into the ro region as read-only tables.
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//
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// The s0/s1 and oa0/oa1 regions are populated inside HeapShared::archive_java_heap_objects.
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// Their layout is independent of the other 4 regions.
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static DumpRegion _mc_region("mc"), _ro_region("ro"), _rw_region("rw"), _symbol_region("symbols");
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static size_t _total_closed_archive_region_size = 0, _total_open_archive_region_size = 0;
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void MetaspaceShared::init_shared_dump_space(DumpRegion* first_space) {
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first_space->init(&_shared_rs, &_shared_vs);
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}
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DumpRegion* MetaspaceShared::misc_code_dump_space() {
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return &_mc_region;
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}
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DumpRegion* MetaspaceShared::read_write_dump_space() {
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return &_rw_region;
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}
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DumpRegion* MetaspaceShared::read_only_dump_space() {
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return &_ro_region;
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}
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void MetaspaceShared::pack_dump_space(DumpRegion* current, DumpRegion* next,
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ReservedSpace* rs) {
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current->pack(next);
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}
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char* MetaspaceShared::symbol_space_alloc(size_t num_bytes) {
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return _symbol_region.allocate(num_bytes);
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}
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char* MetaspaceShared::misc_code_space_alloc(size_t num_bytes) {
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return _mc_region.allocate(num_bytes);
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}
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char* MetaspaceShared::read_only_space_alloc(size_t num_bytes) {
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return _ro_region.allocate(num_bytes);
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}
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char* MetaspaceShared::read_write_space_alloc(size_t num_bytes) {
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return _rw_region.allocate(num_bytes);
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}
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size_t MetaspaceShared::reserved_space_alignment() { return os::vm_allocation_granularity(); }
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static bool shared_base_valid(char* shared_base) {
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#ifdef _LP64
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return CompressedKlassPointers::is_valid_base((address)shared_base);
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#else
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return true;
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#endif
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}
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static bool shared_base_too_high(char* shared_base, size_t cds_total) {
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if (SharedBaseAddress != 0 && shared_base < (char*)SharedBaseAddress) {
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// SharedBaseAddress is very high (e.g., 0xffffffffffffff00) so
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// align_up(SharedBaseAddress, MetaspaceShared::reserved_space_alignment()) has wrapped around.
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return true;
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}
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if (max_uintx - uintx(shared_base) < uintx(cds_total)) {
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// The end of the archive will wrap around
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return true;
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}
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return false;
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}
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static char* compute_shared_base(size_t cds_total) {
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char* shared_base = (char*)align_up((char*)SharedBaseAddress, MetaspaceShared::reserved_space_alignment());
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const char* err = NULL;
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if (shared_base_too_high(shared_base, cds_total)) {
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err = "too high";
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} else if (!shared_base_valid(shared_base)) {
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err = "invalid for this platform";
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}
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if (err) {
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log_warning(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is %s. Reverted to " INTPTR_FORMAT,
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p2i((void*)SharedBaseAddress), err,
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p2i((void*)Arguments::default_SharedBaseAddress()));
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SharedBaseAddress = Arguments::default_SharedBaseAddress();
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shared_base = (char*)align_up((char*)SharedBaseAddress, MetaspaceShared::reserved_space_alignment());
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}
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assert(!shared_base_too_high(shared_base, cds_total) && shared_base_valid(shared_base), "Sanity");
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return shared_base;
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}
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void MetaspaceShared::initialize_dumptime_shared_and_meta_spaces() {
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assert(DumpSharedSpaces, "should be called for dump time only");
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const size_t reserve_alignment = MetaspaceShared::reserved_space_alignment();
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#ifdef _LP64
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// On 64-bit VM we reserve a 4G range and, if UseCompressedClassPointers=1,
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// will use that to house both the archives and the ccs. See below for
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// details.
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const uint64_t UnscaledClassSpaceMax = (uint64_t(max_juint) + 1);
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const size_t cds_total = align_down(UnscaledClassSpaceMax, reserve_alignment);
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#else
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// We don't support archives larger than 256MB on 32-bit due to limited
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// virtual address space.
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size_t cds_total = align_down(256*M, reserve_alignment);
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#endif
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char* shared_base = compute_shared_base(cds_total);
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_requested_base_address = shared_base;
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// Whether to use SharedBaseAddress as attach address.
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bool use_requested_base = true;
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if (shared_base == NULL) {
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use_requested_base = false;
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}
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if (ArchiveRelocationMode == 1) {
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log_info(cds)("ArchiveRelocationMode == 1: always allocate class space at an alternative address");
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use_requested_base = false;
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}
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// First try to reserve the space at the specified SharedBaseAddress.
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assert(!_shared_rs.is_reserved(), "must be");
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if (use_requested_base) {
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_shared_rs = ReservedSpace(cds_total, reserve_alignment,
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false /* large */, (char*)shared_base);
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if (_shared_rs.is_reserved()) {
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assert(_shared_rs.base() == shared_base, "should match");
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} else {
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log_info(cds)("dumptime space reservation: failed to map at "
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"SharedBaseAddress " PTR_FORMAT, p2i(shared_base));
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}
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}
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if (!_shared_rs.is_reserved()) {
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// Get a reserved space anywhere if attaching at the SharedBaseAddress
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// fails:
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if (UseCompressedClassPointers) {
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// If we need to reserve class space as well, let the platform handle
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// the reservation.
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LP64_ONLY(_shared_rs =
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Metaspace::reserve_address_space_for_compressed_classes(cds_total);)
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NOT_LP64(ShouldNotReachHere();)
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} else {
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// anywhere is fine.
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_shared_rs = ReservedSpace(cds_total, reserve_alignment,
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false /* large */, (char*)NULL);
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}
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}
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if (!_shared_rs.is_reserved()) {
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vm_exit_during_initialization("Unable to reserve memory for shared space",
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err_msg(SIZE_FORMAT " bytes.", cds_total));
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}
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#ifdef _LP64
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if (UseCompressedClassPointers) {
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assert(CompressedKlassPointers::is_valid_base((address)_shared_rs.base()), "Sanity");
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// On 64-bit VM, if UseCompressedClassPointers=1, the compressed class space
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// must be allocated near the cds such as that the compressed Klass pointer
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// encoding can be used to en/decode pointers from both cds and ccs. Since
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// Metaspace cannot do this (it knows nothing about cds), we do it for
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// Metaspace here and pass it the space to use for ccs.
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//
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// We do this by reserving space for the ccs behind the archives. Note
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// however that ccs follows a different alignment
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// (Metaspace::reserve_alignment), so there may be a gap between ccs and
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// cds.
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// We use a similar layout at runtime, see reserve_address_space_for_archives().
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//
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// +-- SharedBaseAddress (default = 0x800000000)
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// v
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// +-..---------+---------+ ... +----+----+----+--------+-----------------+
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// | Heap | Archive | | MC | RW | RO | [gap] | class space |
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// +-..---------+---------+ ... +----+----+----+--------+-----------------+
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// |<-- MaxHeapSize -->| |<-- UnscaledClassSpaceMax = 4GB -->|
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//
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// Note: ccs must follow the archives, and the archives must start at the
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// encoding base. However, the exact placement of ccs does not matter as
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// long as it it resides in the encoding range of CompressedKlassPointers
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// and comes after the archive.
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//
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// We do this by splitting up the allocated 4G into 3G of archive space,
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// followed by 1G for the ccs:
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// + The upper 1 GB is used as the "temporary compressed class space"
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// -- preload_classes() will store Klasses into this space.
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// + The lower 3 GB is used for the archive -- when preload_classes()
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// is done, ArchiveBuilder will copy the class metadata into this
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// space, first the RW parts, then the RO parts.
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// Starting address of ccs must be aligned to Metaspace::reserve_alignment()...
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size_t class_space_size = align_down(_shared_rs.size() / 4, Metaspace::reserve_alignment());
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address class_space_start = (address)align_down(_shared_rs.end() - class_space_size, Metaspace::reserve_alignment());
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size_t archive_size = class_space_start - (address)_shared_rs.base();
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ReservedSpace tmp_class_space = _shared_rs.last_part(archive_size);
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_shared_rs = _shared_rs.first_part(archive_size);
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// ... as does the size of ccs.
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tmp_class_space = tmp_class_space.first_part(class_space_size);
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CompressedClassSpaceSize = class_space_size;
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// Let Metaspace initialize ccs
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Metaspace::initialize_class_space(tmp_class_space);
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// and set up CompressedKlassPointers encoding.
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CompressedKlassPointers::initialize((address)_shared_rs.base(), cds_total);
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log_info(cds)("narrow_klass_base = " PTR_FORMAT ", narrow_klass_shift = %d",
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p2i(CompressedKlassPointers::base()), CompressedKlassPointers::shift());
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log_info(cds)("Allocated temporary class space: " SIZE_FORMAT " bytes at " PTR_FORMAT,
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CompressedClassSpaceSize, p2i(tmp_class_space.base()));
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assert(_shared_rs.end() == tmp_class_space.base() &&
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is_aligned(_shared_rs.base(), MetaspaceShared::reserved_space_alignment()) &&
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is_aligned(tmp_class_space.base(), Metaspace::reserve_alignment()) &&
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is_aligned(tmp_class_space.size(), Metaspace::reserve_alignment()), "Sanity");
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}
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#endif
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init_shared_dump_space(&_mc_region);
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SharedBaseAddress = (size_t)_shared_rs.base();
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log_info(cds)("Allocated shared space: " SIZE_FORMAT " bytes at " PTR_FORMAT,
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_shared_rs.size(), p2i(_shared_rs.base()));
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size_t symbol_rs_size = LP64_ONLY(3 * G) NOT_LP64(128 * M);
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_symbol_rs = ReservedSpace(symbol_rs_size);
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if (!_symbol_rs.is_reserved()) {
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vm_exit_during_initialization("Unable to reserve memory for symbols",
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err_msg(SIZE_FORMAT " bytes.", symbol_rs_size));
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}
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_symbol_region.init(&_symbol_rs, &_symbol_vs);
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}
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// Called by universe_post_init()
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void MetaspaceShared::post_initialize(TRAPS) {
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if (UseSharedSpaces) {
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int size = FileMapInfo::get_number_of_shared_paths();
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if (size > 0) {
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SystemDictionaryShared::allocate_shared_data_arrays(size, THREAD);
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if (!DynamicDumpSharedSpaces) {
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FileMapInfo* info;
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if (FileMapInfo::dynamic_info() == NULL) {
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info = FileMapInfo::current_info();
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} else {
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info = FileMapInfo::dynamic_info();
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}
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ClassLoaderExt::init_paths_start_index(info->app_class_paths_start_index());
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ClassLoaderExt::init_app_module_paths_start_index(info->app_module_paths_start_index());
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}
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}
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}
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}
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static GrowableArrayCHeap<OopHandle, mtClassShared>* _extra_interned_strings = NULL;
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static GrowableArrayCHeap<Symbol*, mtClassShared>* _extra_symbols = NULL;
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void MetaspaceShared::read_extra_data(const char* filename, TRAPS) {
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_extra_interned_strings = new GrowableArrayCHeap<OopHandle, mtClassShared>(10000);
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_extra_symbols = new GrowableArrayCHeap<Symbol*, mtClassShared>(1000);
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HashtableTextDump reader(filename);
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reader.check_version("VERSION: 1.0");
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while (reader.remain() > 0) {
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int utf8_length;
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int prefix_type = reader.scan_prefix(&utf8_length);
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ResourceMark rm(THREAD);
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if (utf8_length == 0x7fffffff) {
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// buf_len will overflown 32-bit value.
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vm_exit_during_initialization(err_msg("string length too large: %d", utf8_length));
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}
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int buf_len = utf8_length+1;
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char* utf8_buffer = NEW_RESOURCE_ARRAY(char, buf_len);
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reader.get_utf8(utf8_buffer, utf8_length);
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utf8_buffer[utf8_length] = '\0';
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if (prefix_type == HashtableTextDump::SymbolPrefix) {
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_extra_symbols->append(SymbolTable::new_permanent_symbol(utf8_buffer));
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} else{
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assert(prefix_type == HashtableTextDump::StringPrefix, "Sanity");
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oop str = StringTable::intern(utf8_buffer, THREAD);
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if (HAS_PENDING_EXCEPTION) {
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log_warning(cds, heap)("[line %d] extra interned string allocation failed; size too large: %d",
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reader.last_line_no(), utf8_length);
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CLEAR_PENDING_EXCEPTION;
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} else {
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#if INCLUDE_G1GC
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if (UseG1GC) {
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typeArrayOop body = java_lang_String::value(str);
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const HeapRegion* hr = G1CollectedHeap::heap()->heap_region_containing(body);
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if (hr->is_humongous()) {
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// Don't keep it alive, so it will be GC'ed before we dump the strings, in order
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// to maximize free heap space and minimize fragmentation.
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log_warning(cds, heap)("[line %d] extra interned string ignored; size too large: %d",
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reader.last_line_no(), utf8_length);
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continue;
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}
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}
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#endif
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// Make sure this string is included in the dumped interned string table.
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assert(str != NULL, "must succeed");
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_extra_interned_strings->append(OopHandle(Universe::vm_global(), str));
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}
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}
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}
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}
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void MetaspaceShared::commit_to(ReservedSpace* rs, VirtualSpace* vs, char* newtop) {
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Arguments::assert_is_dumping_archive();
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char* base = rs->base();
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size_t need_committed_size = newtop - base;
|
|
size_t has_committed_size = vs->committed_size();
|
|
if (need_committed_size < has_committed_size) {
|
|
return;
|
|
}
|
|
|
|
size_t min_bytes = need_committed_size - has_committed_size;
|
|
size_t preferred_bytes = 1 * M;
|
|
size_t uncommitted = vs->reserved_size() - has_committed_size;
|
|
|
|
size_t commit =MAX2(min_bytes, preferred_bytes);
|
|
commit = MIN2(commit, uncommitted);
|
|
assert(commit <= uncommitted, "sanity");
|
|
|
|
bool result = vs->expand_by(commit, false);
|
|
if (rs == &_shared_rs) {
|
|
ArchivePtrMarker::expand_ptr_end((address*)vs->high());
|
|
}
|
|
|
|
if (!result) {
|
|
vm_exit_during_initialization(err_msg("Failed to expand shared space to " SIZE_FORMAT " bytes",
|
|
need_committed_size));
|
|
}
|
|
|
|
assert(rs == &_shared_rs || rs == &_symbol_rs, "must be");
|
|
const char* which = (rs == &_shared_rs) ? "shared" : "symbol";
|
|
log_debug(cds)("Expanding %s spaces by " SIZE_FORMAT_W(7) " bytes [total " SIZE_FORMAT_W(9) " bytes ending at %p]",
|
|
which, commit, vs->actual_committed_size(), vs->high());
|
|
}
|
|
|
|
void MetaspaceShared::initialize_ptr_marker(CHeapBitMap* ptrmap) {
|
|
ArchivePtrMarker::initialize(ptrmap, (address*)_shared_vs.low(), (address*)_shared_vs.high());
|
|
}
|
|
|
|
// Read/write a data stream for restoring/preserving metadata pointers and
|
|
// miscellaneous data from/to the shared archive file.
|
|
|
|
void MetaspaceShared::serialize(SerializeClosure* soc) {
|
|
int tag = 0;
|
|
soc->do_tag(--tag);
|
|
|
|
// Verify the sizes of various metadata in the system.
|
|
soc->do_tag(sizeof(Method));
|
|
soc->do_tag(sizeof(ConstMethod));
|
|
soc->do_tag(arrayOopDesc::base_offset_in_bytes(T_BYTE));
|
|
soc->do_tag(sizeof(ConstantPool));
|
|
soc->do_tag(sizeof(ConstantPoolCache));
|
|
soc->do_tag(objArrayOopDesc::base_offset_in_bytes());
|
|
soc->do_tag(typeArrayOopDesc::base_offset_in_bytes(T_BYTE));
|
|
soc->do_tag(sizeof(Symbol));
|
|
|
|
// Dump/restore miscellaneous metadata.
|
|
JavaClasses::serialize_offsets(soc);
|
|
Universe::serialize(soc);
|
|
soc->do_tag(--tag);
|
|
|
|
// Dump/restore references to commonly used names and signatures.
|
|
vmSymbols::serialize(soc);
|
|
soc->do_tag(--tag);
|
|
|
|
// Dump/restore the symbol/string/subgraph_info tables
|
|
SymbolTable::serialize_shared_table_header(soc);
|
|
StringTable::serialize_shared_table_header(soc);
|
|
HeapShared::serialize_subgraph_info_table_header(soc);
|
|
SystemDictionaryShared::serialize_dictionary_headers(soc);
|
|
|
|
InstanceMirrorKlass::serialize_offsets(soc);
|
|
|
|
// Dump/restore well known classes (pointers)
|
|
SystemDictionaryShared::serialize_well_known_klasses(soc);
|
|
soc->do_tag(--tag);
|
|
|
|
CppVtables::serialize(soc);
|
|
soc->do_tag(--tag);
|
|
|
|
CDS_JAVA_HEAP_ONLY(ClassLoaderDataShared::serialize(soc);)
|
|
|
|
soc->do_tag(666);
|
|
}
|
|
|
|
void MetaspaceShared::init_misc_code_space() {
|
|
// We don't want any valid object to be at the very bottom of the archive.
|
|
// See ArchivePtrMarker::mark_pointer().
|
|
MetaspaceShared::misc_code_space_alloc(16);
|
|
|
|
size_t trampoline_size = SharedRuntime::trampoline_size();
|
|
size_t buf_size = (size_t)AbstractInterpreter::number_of_method_entries * trampoline_size;
|
|
_i2i_entry_code_buffers = (address)misc_code_space_alloc(buf_size);
|
|
}
|
|
|
|
address MetaspaceShared::i2i_entry_code_buffers() {
|
|
assert(DumpSharedSpaces || UseSharedSpaces, "must be");
|
|
assert(_i2i_entry_code_buffers != NULL, "must already been initialized");
|
|
return _i2i_entry_code_buffers;
|
|
}
|
|
|
|
uintx MetaspaceShared::object_delta_uintx(void* obj) {
|
|
Arguments::assert_is_dumping_archive();
|
|
if (DumpSharedSpaces) {
|
|
assert(shared_rs()->contains(obj), "must be");
|
|
} else {
|
|
assert(is_in_shared_metaspace(obj) || DynamicArchive::is_in_target_space(obj), "must be");
|
|
}
|
|
address base_address = address(SharedBaseAddress);
|
|
uintx deltax = address(obj) - base_address;
|
|
return deltax;
|
|
}
|
|
|
|
// Global object for holding classes that have been loaded. Since this
|
|
// is run at a safepoint just before exit, this is the entire set of classes.
|
|
static GrowableArray<Klass*>* _global_klass_objects;
|
|
|
|
GrowableArray<Klass*>* MetaspaceShared::collected_klasses() {
|
|
return _global_klass_objects;
|
|
}
|
|
|
|
static void rewrite_nofast_bytecode(const methodHandle& method) {
|
|
BytecodeStream bcs(method);
|
|
while (!bcs.is_last_bytecode()) {
|
|
Bytecodes::Code opcode = bcs.next();
|
|
switch (opcode) {
|
|
case Bytecodes::_getfield: *bcs.bcp() = Bytecodes::_nofast_getfield; break;
|
|
case Bytecodes::_putfield: *bcs.bcp() = Bytecodes::_nofast_putfield; break;
|
|
case Bytecodes::_aload_0: *bcs.bcp() = Bytecodes::_nofast_aload_0; break;
|
|
case Bytecodes::_iload: {
|
|
if (!bcs.is_wide()) {
|
|
*bcs.bcp() = Bytecodes::_nofast_iload;
|
|
}
|
|
break;
|
|
}
|
|
default: break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// [1] Rewrite all bytecodes as needed, so that the ConstMethod* will not be modified
|
|
// at run time by RewriteBytecodes/RewriteFrequentPairs
|
|
// [2] Assign a fingerprint, so one doesn't need to be assigned at run-time.
|
|
void MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread* thread, InstanceKlass* ik) {
|
|
for (int i = 0; i < ik->methods()->length(); i++) {
|
|
methodHandle m(thread, ik->methods()->at(i));
|
|
rewrite_nofast_bytecode(m);
|
|
Fingerprinter fp(m);
|
|
// The side effect of this call sets method's fingerprint field.
|
|
fp.fingerprint();
|
|
}
|
|
}
|
|
|
|
class VM_PopulateDumpSharedSpace: public VM_Operation {
|
|
private:
|
|
GrowableArray<MemRegion> *_closed_archive_heap_regions;
|
|
GrowableArray<MemRegion> *_open_archive_heap_regions;
|
|
|
|
GrowableArray<ArchiveHeapOopmapInfo> *_closed_archive_heap_oopmaps;
|
|
GrowableArray<ArchiveHeapOopmapInfo> *_open_archive_heap_oopmaps;
|
|
|
|
void dump_java_heap_objects() NOT_CDS_JAVA_HEAP_RETURN;
|
|
void dump_archive_heap_oopmaps() NOT_CDS_JAVA_HEAP_RETURN;
|
|
void dump_archive_heap_oopmaps(GrowableArray<MemRegion>* regions,
|
|
GrowableArray<ArchiveHeapOopmapInfo>* oopmaps);
|
|
void dump_shared_symbol_table(GrowableArray<Symbol*>* symbols) {
|
|
log_info(cds)("Dumping symbol table ...");
|
|
SymbolTable::write_to_archive(symbols);
|
|
}
|
|
char* dump_read_only_tables();
|
|
void print_region_stats(FileMapInfo* map_info);
|
|
void print_bitmap_region_stats(size_t size, size_t total_size);
|
|
void print_heap_region_stats(GrowableArray<MemRegion> *heap_mem,
|
|
const char *name, size_t total_size);
|
|
void relocate_to_requested_base_address(CHeapBitMap* ptrmap);
|
|
|
|
public:
|
|
|
|
VMOp_Type type() const { return VMOp_PopulateDumpSharedSpace; }
|
|
void doit(); // outline because gdb sucks
|
|
bool allow_nested_vm_operations() const { return true; }
|
|
}; // class VM_PopulateDumpSharedSpace
|
|
|
|
class StaticArchiveBuilder : public ArchiveBuilder {
|
|
public:
|
|
StaticArchiveBuilder(DumpRegion* mc_region, DumpRegion* rw_region, DumpRegion* ro_region)
|
|
: ArchiveBuilder(mc_region, rw_region, ro_region) {
|
|
_alloc_bottom = address(SharedBaseAddress);
|
|
_buffer_to_target_delta = 0;
|
|
}
|
|
|
|
virtual void iterate_roots(MetaspaceClosure* it, bool is_relocating_pointers) {
|
|
FileMapInfo::metaspace_pointers_do(it, false);
|
|
SystemDictionaryShared::dumptime_classes_do(it);
|
|
Universe::metaspace_pointers_do(it);
|
|
vmSymbols::metaspace_pointers_do(it);
|
|
|
|
// The above code should find all the symbols that are referenced by the
|
|
// archived classes. We just need to add the extra symbols which
|
|
// may not be used by any of the archived classes -- these are usually
|
|
// symbols that we anticipate to be used at run time, so we can store
|
|
// them in the RO region, to be shared across multiple processes.
|
|
if (_extra_symbols != NULL) {
|
|
for (int i = 0; i < _extra_symbols->length(); i++) {
|
|
it->push(_extra_symbols->adr_at(i));
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
char* VM_PopulateDumpSharedSpace::dump_read_only_tables() {
|
|
ArchiveBuilder::OtherROAllocMark mark;
|
|
|
|
SystemDictionaryShared::write_to_archive();
|
|
|
|
// Write the other data to the output array.
|
|
char* start = _ro_region.top();
|
|
WriteClosure wc(&_ro_region);
|
|
MetaspaceShared::serialize(&wc);
|
|
|
|
// Write the bitmaps for patching the archive heap regions
|
|
_closed_archive_heap_oopmaps = NULL;
|
|
_open_archive_heap_oopmaps = NULL;
|
|
dump_archive_heap_oopmaps();
|
|
|
|
return start;
|
|
}
|
|
|
|
void VM_PopulateDumpSharedSpace::relocate_to_requested_base_address(CHeapBitMap* ptrmap) {
|
|
intx addr_delta = MetaspaceShared::final_delta();
|
|
if (addr_delta == 0) {
|
|
ArchivePtrMarker::compact((address)SharedBaseAddress, (address)_ro_region.top());
|
|
} else {
|
|
// We are not able to reserve space at MetaspaceShared::requested_base_address() (due to ASLR).
|
|
// This means that the current content of the archive is based on a random
|
|
// address. Let's relocate all the pointers, so that it can be mapped to
|
|
// MetaspaceShared::requested_base_address() without runtime relocation.
|
|
//
|
|
// Note: both the base and dynamic archive are written with
|
|
// FileMapHeader::_requested_base_address == MetaspaceShared::requested_base_address()
|
|
|
|
// Patch all pointers that are marked by ptrmap within this region,
|
|
// where we have just dumped all the metaspace data.
|
|
address patch_base = (address)SharedBaseAddress;
|
|
address patch_end = (address)_ro_region.top();
|
|
size_t size = patch_end - patch_base;
|
|
|
|
// the current value of the pointers to be patched must be within this
|
|
// range (i.e., must point to valid metaspace objects)
|
|
address valid_old_base = patch_base;
|
|
address valid_old_end = patch_end;
|
|
|
|
// after patching, the pointers must point inside this range
|
|
// (the requested location of the archive, as mapped at runtime).
|
|
address valid_new_base = (address)MetaspaceShared::requested_base_address();
|
|
address valid_new_end = valid_new_base + size;
|
|
|
|
log_debug(cds)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT " ] to "
|
|
"[" INTPTR_FORMAT " - " INTPTR_FORMAT " ]", p2i(patch_base), p2i(patch_end),
|
|
p2i(valid_new_base), p2i(valid_new_end));
|
|
|
|
SharedDataRelocator<true> patcher((address*)patch_base, (address*)patch_end, valid_old_base, valid_old_end,
|
|
valid_new_base, valid_new_end, addr_delta, ptrmap);
|
|
ptrmap->iterate(&patcher);
|
|
ArchivePtrMarker::compact(patcher.max_non_null_offset());
|
|
}
|
|
}
|
|
|
|
void VM_PopulateDumpSharedSpace::doit() {
|
|
HeapShared::run_full_gc_in_vm_thread();
|
|
CHeapBitMap ptrmap;
|
|
MetaspaceShared::initialize_ptr_marker(&ptrmap);
|
|
|
|
// We should no longer allocate anything from the metaspace, so that:
|
|
//
|
|
// (1) Metaspace::allocate might trigger GC if we have run out of
|
|
// committed metaspace, but we can't GC because we're running
|
|
// in the VM thread.
|
|
// (2) ArchiveBuilder needs to work with a stable set of MetaspaceObjs.
|
|
Metaspace::freeze();
|
|
DEBUG_ONLY(SystemDictionaryShared::NoClassLoadingMark nclm);
|
|
|
|
Thread* THREAD = VMThread::vm_thread();
|
|
|
|
FileMapInfo::check_nonempty_dir_in_shared_path_table();
|
|
|
|
NOT_PRODUCT(SystemDictionary::verify();)
|
|
// The following guarantee is meant to ensure that no loader constraints
|
|
// exist yet, since the constraints table is not shared. This becomes
|
|
// more important now that we don't re-initialize vtables/itables for
|
|
// shared classes at runtime, where constraints were previously created.
|
|
guarantee(SystemDictionary::constraints()->number_of_entries() == 0,
|
|
"loader constraints are not saved");
|
|
guarantee(SystemDictionary::placeholders()->number_of_entries() == 0,
|
|
"placeholders are not saved");
|
|
|
|
// At this point, many classes have been loaded.
|
|
// Gather systemDictionary classes in a global array and do everything to
|
|
// that so we don't have to walk the SystemDictionary again.
|
|
SystemDictionaryShared::check_excluded_classes();
|
|
|
|
StaticArchiveBuilder builder(&_mc_region, &_rw_region, &_ro_region);
|
|
builder.set_current_dump_space(&_mc_region);
|
|
builder.gather_klasses_and_symbols();
|
|
_global_klass_objects = builder.klasses();
|
|
|
|
builder.gather_source_objs();
|
|
|
|
MetaspaceShared::init_misc_code_space();
|
|
builder.allocate_method_trampoline_info();
|
|
builder.allocate_method_trampolines();
|
|
|
|
char* cloned_vtables = CppVtables::dumptime_init();
|
|
|
|
{
|
|
_mc_region.pack(&_rw_region);
|
|
builder.set_current_dump_space(&_rw_region);
|
|
builder.dump_rw_region();
|
|
#if INCLUDE_CDS_JAVA_HEAP
|
|
if (MetaspaceShared::use_full_module_graph()) {
|
|
// Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders
|
|
char* start = _rw_region.top();
|
|
ClassLoaderDataShared::allocate_archived_tables();
|
|
ArchiveBuilder::alloc_stats()->record_modules(_rw_region.top() - start, /*read_only*/false);
|
|
}
|
|
#endif
|
|
}
|
|
{
|
|
_rw_region.pack(&_ro_region);
|
|
builder.set_current_dump_space(&_ro_region);
|
|
builder.dump_ro_region();
|
|
#if INCLUDE_CDS_JAVA_HEAP
|
|
if (MetaspaceShared::use_full_module_graph()) {
|
|
char* start = _ro_region.top();
|
|
ClassLoaderDataShared::init_archived_tables();
|
|
ArchiveBuilder::alloc_stats()->record_modules(_ro_region.top() - start, /*read_only*/true);
|
|
}
|
|
#endif
|
|
}
|
|
builder.relocate_pointers();
|
|
|
|
dump_shared_symbol_table(builder.symbols());
|
|
|
|
// Dump supported java heap objects
|
|
_closed_archive_heap_regions = NULL;
|
|
_open_archive_heap_regions = NULL;
|
|
dump_java_heap_objects();
|
|
|
|
builder.relocate_well_known_klasses();
|
|
|
|
log_info(cds)("Update method trampolines");
|
|
builder.update_method_trampolines();
|
|
|
|
log_info(cds)("Make classes shareable");
|
|
builder.make_klasses_shareable();
|
|
|
|
char* serialized_data = dump_read_only_tables();
|
|
_ro_region.pack();
|
|
|
|
SystemDictionaryShared::adjust_lambda_proxy_class_dictionary();
|
|
|
|
// The vtable clones contain addresses of the current process.
|
|
// We don't want to write these addresses into the archive. Same for i2i buffer.
|
|
CppVtables::zero_archived_vtables();
|
|
|
|
// relocate the data so that it can be mapped to MetaspaceShared::requested_base_address()
|
|
// without runtime relocation.
|
|
relocate_to_requested_base_address(&ptrmap);
|
|
|
|
// Create and write the archive file that maps the shared spaces.
|
|
|
|
FileMapInfo* mapinfo = new FileMapInfo(true);
|
|
mapinfo->populate_header(os::vm_allocation_granularity());
|
|
mapinfo->set_serialized_data(serialized_data);
|
|
mapinfo->set_cloned_vtables(cloned_vtables);
|
|
mapinfo->set_i2i_entry_code_buffers(MetaspaceShared::i2i_entry_code_buffers());
|
|
mapinfo->open_for_write();
|
|
size_t bitmap_size_in_bytes;
|
|
char* bitmap = MetaspaceShared::write_core_archive_regions(mapinfo, _closed_archive_heap_oopmaps,
|
|
_open_archive_heap_oopmaps,
|
|
bitmap_size_in_bytes);
|
|
_total_closed_archive_region_size = mapinfo->write_archive_heap_regions(
|
|
_closed_archive_heap_regions,
|
|
_closed_archive_heap_oopmaps,
|
|
MetaspaceShared::first_closed_archive_heap_region,
|
|
MetaspaceShared::max_closed_archive_heap_region);
|
|
_total_open_archive_region_size = mapinfo->write_archive_heap_regions(
|
|
_open_archive_heap_regions,
|
|
_open_archive_heap_oopmaps,
|
|
MetaspaceShared::first_open_archive_heap_region,
|
|
MetaspaceShared::max_open_archive_heap_region);
|
|
|
|
mapinfo->set_final_requested_base((char*)MetaspaceShared::requested_base_address());
|
|
mapinfo->set_header_crc(mapinfo->compute_header_crc());
|
|
mapinfo->write_header();
|
|
print_region_stats(mapinfo);
|
|
mapinfo->close();
|
|
|
|
builder.write_cds_map_to_log(mapinfo, _closed_archive_heap_regions, _open_archive_heap_regions,
|
|
bitmap, bitmap_size_in_bytes);
|
|
FREE_C_HEAP_ARRAY(char, bitmap);
|
|
|
|
if (log_is_enabled(Info, cds)) {
|
|
builder.print_stats(int(_ro_region.used()), int(_rw_region.used()), int(_mc_region.used()));
|
|
}
|
|
|
|
if (PrintSystemDictionaryAtExit) {
|
|
SystemDictionary::print();
|
|
}
|
|
|
|
if (AllowArchivingWithJavaAgent) {
|
|
warning("This archive was created with AllowArchivingWithJavaAgent. It should be used "
|
|
"for testing purposes only and should not be used in a production environment");
|
|
}
|
|
|
|
// There may be pending VM operations. We have changed some global states
|
|
// (such as SystemDictionary::_well_known_klasses) that may cause these VM operations
|
|
// to fail. For safety, forget these operations and exit the VM directly.
|
|
vm_direct_exit(0);
|
|
}
|
|
|
|
void VM_PopulateDumpSharedSpace::print_region_stats(FileMapInfo *map_info) {
|
|
// Print statistics of all the regions
|
|
const size_t bitmap_used = map_info->space_at(MetaspaceShared::bm)->used();
|
|
const size_t bitmap_reserved = map_info->space_at(MetaspaceShared::bm)->used_aligned();
|
|
const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() +
|
|
_mc_region.reserved() +
|
|
bitmap_reserved +
|
|
_total_closed_archive_region_size +
|
|
_total_open_archive_region_size;
|
|
const size_t total_bytes = _ro_region.used() + _rw_region.used() +
|
|
_mc_region.used() +
|
|
bitmap_used +
|
|
_total_closed_archive_region_size +
|
|
_total_open_archive_region_size;
|
|
const double total_u_perc = percent_of(total_bytes, total_reserved);
|
|
|
|
_mc_region.print(total_reserved);
|
|
_rw_region.print(total_reserved);
|
|
_ro_region.print(total_reserved);
|
|
print_bitmap_region_stats(bitmap_used, total_reserved);
|
|
print_heap_region_stats(_closed_archive_heap_regions, "ca", total_reserved);
|
|
print_heap_region_stats(_open_archive_heap_regions, "oa", total_reserved);
|
|
|
|
log_debug(cds)("total : " SIZE_FORMAT_W(9) " [100.0%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used]",
|
|
total_bytes, total_reserved, total_u_perc);
|
|
}
|
|
|
|
void VM_PopulateDumpSharedSpace::print_bitmap_region_stats(size_t size, size_t total_size) {
|
|
log_debug(cds)("bm space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used]",
|
|
size, size/double(total_size)*100.0, size);
|
|
}
|
|
|
|
void VM_PopulateDumpSharedSpace::print_heap_region_stats(GrowableArray<MemRegion> *heap_mem,
|
|
const char *name, size_t total_size) {
|
|
int arr_len = heap_mem == NULL ? 0 : heap_mem->length();
|
|
for (int i = 0; i < arr_len; i++) {
|
|
char* start = (char*)heap_mem->at(i).start();
|
|
size_t size = heap_mem->at(i).byte_size();
|
|
char* top = start + size;
|
|
log_debug(cds)("%s%d space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used] at " INTPTR_FORMAT,
|
|
name, i, size, size/double(total_size)*100.0, size, p2i(start));
|
|
|
|
}
|
|
}
|
|
|
|
char* MetaspaceShared::write_core_archive_regions(FileMapInfo* mapinfo,
|
|
GrowableArray<ArchiveHeapOopmapInfo>* closed_oopmaps,
|
|
GrowableArray<ArchiveHeapOopmapInfo>* open_oopmaps,
|
|
size_t& bitmap_size_in_bytes) {
|
|
// Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with
|
|
// MetaspaceShared::n_regions (internal to hotspot).
|
|
assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity");
|
|
|
|
// mc contains the trampoline code for method entries, which are patched at run time,
|
|
// so it needs to be read/write.
|
|
write_region(mapinfo, mc, &_mc_region, /*read_only=*/false,/*allow_exec=*/true);
|
|
write_region(mapinfo, rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false);
|
|
write_region(mapinfo, ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false);
|
|
|
|
return mapinfo->write_bitmap_region(ArchivePtrMarker::ptrmap(), closed_oopmaps, open_oopmaps,
|
|
bitmap_size_in_bytes);
|
|
}
|
|
|
|
void MetaspaceShared::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) {
|
|
mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec);
|
|
}
|
|
|
|
// Update a Java object to point its Klass* to the new location after
|
|
// shared archive has been compacted.
|
|
void MetaspaceShared::relocate_klass_ptr(oop o) {
|
|
assert(DumpSharedSpaces, "sanity");
|
|
Klass* k = ArchiveBuilder::get_relocated_klass(o->klass());
|
|
o->set_klass(k);
|
|
}
|
|
|
|
Klass* MetaspaceShared::get_relocated_klass(Klass *k, bool is_final) {
|
|
assert(DumpSharedSpaces, "sanity");
|
|
k = ArchiveBuilder::get_relocated_klass(k);
|
|
if (is_final) {
|
|
k = (Klass*)(address(k) + final_delta());
|
|
}
|
|
return k;
|
|
}
|
|
|
|
static GrowableArray<ClassLoaderData*>* _loaded_cld = NULL;
|
|
|
|
class CollectCLDClosure : public CLDClosure {
|
|
void do_cld(ClassLoaderData* cld) {
|
|
if (_loaded_cld == NULL) {
|
|
_loaded_cld = new (ResourceObj::C_HEAP, mtClassShared)GrowableArray<ClassLoaderData*>(10, mtClassShared);
|
|
}
|
|
if (!cld->is_unloading()) {
|
|
cld->inc_keep_alive();
|
|
_loaded_cld->append(cld);
|
|
}
|
|
}
|
|
};
|
|
|
|
bool MetaspaceShared::linking_required(InstanceKlass* ik) {
|
|
// For dynamic CDS dump, only link classes loaded by the builtin class loaders.
|
|
return DumpSharedSpaces ? true : !ik->is_shared_unregistered_class();
|
|
}
|
|
|
|
bool MetaspaceShared::link_class_for_cds(InstanceKlass* ik, TRAPS) {
|
|
// Link the class to cause the bytecodes to be rewritten and the
|
|
// cpcache to be created. Class verification is done according
|
|
// to -Xverify setting.
|
|
bool res = MetaspaceShared::try_link_class(ik, THREAD);
|
|
guarantee(!HAS_PENDING_EXCEPTION, "exception in link_class");
|
|
|
|
if (DumpSharedSpaces) {
|
|
// The following function is used to resolve all Strings in the statically
|
|
// dumped classes to archive all the Strings. The archive heap is not supported
|
|
// for the dynamic archive.
|
|
ik->constants()->resolve_class_constants(THREAD);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
void MetaspaceShared::link_and_cleanup_shared_classes(TRAPS) {
|
|
// Collect all loaded ClassLoaderData.
|
|
CollectCLDClosure collect_cld;
|
|
{
|
|
MutexLocker lock(ClassLoaderDataGraph_lock);
|
|
ClassLoaderDataGraph::loaded_cld_do(&collect_cld);
|
|
}
|
|
|
|
while (true) {
|
|
bool has_linked = false;
|
|
for (int i = 0; i < _loaded_cld->length(); i++) {
|
|
ClassLoaderData* cld = _loaded_cld->at(i);
|
|
for (Klass* klass = cld->klasses(); klass != NULL; klass = klass->next_link()) {
|
|
if (klass->is_instance_klass()) {
|
|
InstanceKlass* ik = InstanceKlass::cast(klass);
|
|
if (linking_required(ik)) {
|
|
has_linked |= link_class_for_cds(ik, THREAD);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!has_linked) {
|
|
break;
|
|
}
|
|
// Class linking includes verification which may load more classes.
|
|
// Keep scanning until we have linked no more classes.
|
|
}
|
|
|
|
for (int i = 0; i < _loaded_cld->length(); i++) {
|
|
ClassLoaderData* cld = _loaded_cld->at(i);
|
|
cld->dec_keep_alive();
|
|
}
|
|
}
|
|
|
|
void MetaspaceShared::prepare_for_dumping() {
|
|
Arguments::check_unsupported_dumping_properties();
|
|
ClassLoader::initialize_shared_path();
|
|
}
|
|
|
|
// Preload classes from a list, populate the shared spaces and dump to a
|
|
// file.
|
|
void MetaspaceShared::preload_and_dump(TRAPS) {
|
|
{ TraceTime timer("Dump Shared Spaces", TRACETIME_LOG(Info, startuptime));
|
|
ResourceMark rm(THREAD);
|
|
char class_list_path_str[JVM_MAXPATHLEN];
|
|
// Preload classes to be shared.
|
|
const char* class_list_path;
|
|
if (SharedClassListFile == NULL) {
|
|
// Construct the path to the class list (in jre/lib)
|
|
// Walk up two directories from the location of the VM and
|
|
// optionally tack on "lib" (depending on platform)
|
|
os::jvm_path(class_list_path_str, sizeof(class_list_path_str));
|
|
for (int i = 0; i < 3; i++) {
|
|
char *end = strrchr(class_list_path_str, *os::file_separator());
|
|
if (end != NULL) *end = '\0';
|
|
}
|
|
int class_list_path_len = (int)strlen(class_list_path_str);
|
|
if (class_list_path_len >= 3) {
|
|
if (strcmp(class_list_path_str + class_list_path_len - 3, "lib") != 0) {
|
|
if (class_list_path_len < JVM_MAXPATHLEN - 4) {
|
|
jio_snprintf(class_list_path_str + class_list_path_len,
|
|
sizeof(class_list_path_str) - class_list_path_len,
|
|
"%slib", os::file_separator());
|
|
class_list_path_len += 4;
|
|
}
|
|
}
|
|
}
|
|
if (class_list_path_len < JVM_MAXPATHLEN - 10) {
|
|
jio_snprintf(class_list_path_str + class_list_path_len,
|
|
sizeof(class_list_path_str) - class_list_path_len,
|
|
"%sclasslist", os::file_separator());
|
|
}
|
|
class_list_path = class_list_path_str;
|
|
} else {
|
|
class_list_path = SharedClassListFile;
|
|
}
|
|
|
|
log_info(cds)("Loading classes to share ...");
|
|
_has_error_classes = false;
|
|
int class_count = preload_classes(class_list_path, THREAD);
|
|
if (ExtraSharedClassListFile) {
|
|
class_count += preload_classes(ExtraSharedClassListFile, THREAD);
|
|
}
|
|
log_info(cds)("Loading classes to share: done.");
|
|
|
|
log_info(cds)("Shared spaces: preloaded %d classes", class_count);
|
|
|
|
if (SharedArchiveConfigFile) {
|
|
log_info(cds)("Reading extra data from %s ...", SharedArchiveConfigFile);
|
|
read_extra_data(SharedArchiveConfigFile, THREAD);
|
|
log_info(cds)("Reading extra data: done.");
|
|
}
|
|
|
|
if (LambdaFormInvokers::lambdaform_lines() != NULL) {
|
|
log_info(cds)("Regenerate MethodHandle Holder classes...");
|
|
LambdaFormInvokers::regenerate_holder_classes(THREAD);
|
|
log_info(cds)("Regenerate MethodHandle Holder classes done.");
|
|
}
|
|
|
|
HeapShared::init_for_dumping(THREAD);
|
|
|
|
// exercise the manifest processing code to ensure classes used by CDS are always archived
|
|
SystemDictionaryShared::create_jar_manifest("Manifest-Version: 1.0\n", strlen("Manifest-Version: 1.0\n"), THREAD);
|
|
// Rewrite and link classes
|
|
log_info(cds)("Rewriting and linking classes ...");
|
|
|
|
// Link any classes which got missed. This would happen if we have loaded classes that
|
|
// were not explicitly specified in the classlist. E.g., if an interface implemented by class K
|
|
// fails verification, all other interfaces that were not specified in the classlist but
|
|
// are implemented by K are not verified.
|
|
link_and_cleanup_shared_classes(CATCH);
|
|
log_info(cds)("Rewriting and linking classes: done");
|
|
|
|
#if INCLUDE_CDS_JAVA_HEAP
|
|
if (use_full_module_graph()) {
|
|
HeapShared::reset_archived_object_states(THREAD);
|
|
}
|
|
#endif
|
|
|
|
VM_PopulateDumpSharedSpace op;
|
|
MutexLocker ml(THREAD, HeapShared::is_heap_object_archiving_allowed() ?
|
|
Heap_lock : NULL); // needed by HeapShared::run_gc()
|
|
VMThread::execute(&op);
|
|
}
|
|
}
|
|
|
|
|
|
int MetaspaceShared::preload_classes(const char* class_list_path, TRAPS) {
|
|
ClassListParser parser(class_list_path);
|
|
int class_count = 0;
|
|
|
|
while (parser.parse_one_line()) {
|
|
if (parser.lambda_form_line()) {
|
|
continue;
|
|
}
|
|
Klass* klass = parser.load_current_class(THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
if (klass == NULL &&
|
|
(PENDING_EXCEPTION->klass()->name() == vmSymbols::java_lang_ClassNotFoundException())) {
|
|
// print a warning only when the pending exception is class not found
|
|
log_warning(cds)("Preload Warning: Cannot find %s", parser.current_class_name());
|
|
}
|
|
CLEAR_PENDING_EXCEPTION;
|
|
}
|
|
if (klass != NULL) {
|
|
if (log_is_enabled(Trace, cds)) {
|
|
ResourceMark rm(THREAD);
|
|
log_trace(cds)("Shared spaces preloaded: %s", klass->external_name());
|
|
}
|
|
|
|
if (klass->is_instance_klass()) {
|
|
InstanceKlass* ik = InstanceKlass::cast(klass);
|
|
|
|
// Link the class to cause the bytecodes to be rewritten and the
|
|
// cpcache to be created. The linking is done as soon as classes
|
|
// are loaded in order that the related data structures (klass and
|
|
// cpCache) are located together.
|
|
try_link_class(ik, THREAD);
|
|
guarantee(!HAS_PENDING_EXCEPTION, "exception in link_class");
|
|
}
|
|
|
|
class_count++;
|
|
}
|
|
}
|
|
|
|
return class_count;
|
|
}
|
|
|
|
// Returns true if the class's status has changed
|
|
bool MetaspaceShared::try_link_class(InstanceKlass* ik, TRAPS) {
|
|
Arguments::assert_is_dumping_archive();
|
|
if (ik->is_loaded() && !ik->is_linked() &&
|
|
!SystemDictionaryShared::has_class_failed_verification(ik)) {
|
|
bool saved = BytecodeVerificationLocal;
|
|
if (ik->is_shared_unregistered_class() && ik->class_loader() == NULL) {
|
|
// The verification decision is based on BytecodeVerificationRemote
|
|
// for non-system classes. Since we are using the NULL classloader
|
|
// to load non-system classes for customized class loaders during dumping,
|
|
// we need to temporarily change BytecodeVerificationLocal to be the same as
|
|
// BytecodeVerificationRemote. Note this can cause the parent system
|
|
// classes also being verified. The extra overhead is acceptable during
|
|
// dumping.
|
|
BytecodeVerificationLocal = BytecodeVerificationRemote;
|
|
}
|
|
ik->link_class(THREAD);
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
ResourceMark rm(THREAD);
|
|
log_warning(cds)("Preload Warning: Verification failed for %s",
|
|
ik->external_name());
|
|
CLEAR_PENDING_EXCEPTION;
|
|
SystemDictionaryShared::set_class_has_failed_verification(ik);
|
|
_has_error_classes = true;
|
|
}
|
|
BytecodeVerificationLocal = saved;
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
#if INCLUDE_CDS_JAVA_HEAP
|
|
void VM_PopulateDumpSharedSpace::dump_java_heap_objects() {
|
|
if(!HeapShared::is_heap_object_archiving_allowed()) {
|
|
log_info(cds)(
|
|
"Archived java heap is not supported as UseG1GC, "
|
|
"UseCompressedOops and UseCompressedClassPointers are required."
|
|
"Current settings: UseG1GC=%s, UseCompressedOops=%s, UseCompressedClassPointers=%s.",
|
|
BOOL_TO_STR(UseG1GC), BOOL_TO_STR(UseCompressedOops),
|
|
BOOL_TO_STR(UseCompressedClassPointers));
|
|
return;
|
|
}
|
|
// Find all the interned strings that should be dumped.
|
|
int i;
|
|
for (i = 0; i < _global_klass_objects->length(); i++) {
|
|
Klass* k = _global_klass_objects->at(i);
|
|
if (k->is_instance_klass()) {
|
|
InstanceKlass* ik = InstanceKlass::cast(k);
|
|
ik->constants()->add_dumped_interned_strings();
|
|
}
|
|
}
|
|
if (_extra_interned_strings != NULL) {
|
|
for (i = 0; i < _extra_interned_strings->length(); i ++) {
|
|
OopHandle string = _extra_interned_strings->at(i);
|
|
HeapShared::add_to_dumped_interned_strings(string.resolve());
|
|
}
|
|
}
|
|
|
|
// The closed and open archive heap space has maximum two regions.
|
|
// See FileMapInfo::write_archive_heap_regions() for details.
|
|
_closed_archive_heap_regions = new GrowableArray<MemRegion>(2);
|
|
_open_archive_heap_regions = new GrowableArray<MemRegion>(2);
|
|
HeapShared::archive_java_heap_objects(_closed_archive_heap_regions,
|
|
_open_archive_heap_regions);
|
|
ArchiveBuilder::OtherROAllocMark mark;
|
|
HeapShared::write_subgraph_info_table();
|
|
}
|
|
|
|
void VM_PopulateDumpSharedSpace::dump_archive_heap_oopmaps() {
|
|
if (HeapShared::is_heap_object_archiving_allowed()) {
|
|
_closed_archive_heap_oopmaps = new GrowableArray<ArchiveHeapOopmapInfo>(2);
|
|
dump_archive_heap_oopmaps(_closed_archive_heap_regions, _closed_archive_heap_oopmaps);
|
|
|
|
_open_archive_heap_oopmaps = new GrowableArray<ArchiveHeapOopmapInfo>(2);
|
|
dump_archive_heap_oopmaps(_open_archive_heap_regions, _open_archive_heap_oopmaps);
|
|
}
|
|
}
|
|
|
|
void VM_PopulateDumpSharedSpace::dump_archive_heap_oopmaps(GrowableArray<MemRegion>* regions,
|
|
GrowableArray<ArchiveHeapOopmapInfo>* oopmaps) {
|
|
for (int i=0; i<regions->length(); i++) {
|
|
ResourceBitMap oopmap = HeapShared::calculate_oopmap(regions->at(i));
|
|
size_t size_in_bits = oopmap.size();
|
|
size_t size_in_bytes = oopmap.size_in_bytes();
|
|
uintptr_t* buffer = (uintptr_t*)NEW_C_HEAP_ARRAY(char, size_in_bytes, mtInternal);
|
|
oopmap.write_to(buffer, size_in_bytes);
|
|
log_info(cds, heap)("Oopmap = " INTPTR_FORMAT " (" SIZE_FORMAT_W(6) " bytes) for heap region "
|
|
INTPTR_FORMAT " (" SIZE_FORMAT_W(8) " bytes)",
|
|
p2i(buffer), size_in_bytes,
|
|
p2i(regions->at(i).start()), regions->at(i).byte_size());
|
|
|
|
ArchiveHeapOopmapInfo info;
|
|
info._oopmap = (address)buffer;
|
|
info._oopmap_size_in_bits = size_in_bits;
|
|
info._oopmap_size_in_bytes = size_in_bytes;
|
|
oopmaps->append(info);
|
|
}
|
|
}
|
|
#endif // INCLUDE_CDS_JAVA_HEAP
|
|
|
|
void MetaspaceShared::set_shared_metaspace_range(void* base, void *static_top, void* top) {
|
|
assert(base <= static_top && static_top <= top, "must be");
|
|
_shared_metaspace_static_top = static_top;
|
|
MetaspaceObj::set_shared_metaspace_range(base, top);
|
|
}
|
|
|
|
// Return true if given address is in the misc data region
|
|
bool MetaspaceShared::is_in_shared_region(const void* p, int idx) {
|
|
return UseSharedSpaces && FileMapInfo::current_info()->is_in_shared_region(p, idx);
|
|
}
|
|
|
|
bool MetaspaceShared::is_in_trampoline_frame(address addr) {
|
|
if (UseSharedSpaces && is_in_shared_region(addr, MetaspaceShared::mc)) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool MetaspaceShared::is_shared_dynamic(void* p) {
|
|
if ((p < MetaspaceObj::shared_metaspace_top()) &&
|
|
(p >= _shared_metaspace_static_top)) {
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
void MetaspaceShared::initialize_runtime_shared_and_meta_spaces() {
|
|
assert(UseSharedSpaces, "Must be called when UseSharedSpaces is enabled");
|
|
MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
|
|
|
|
FileMapInfo* static_mapinfo = open_static_archive();
|
|
FileMapInfo* dynamic_mapinfo = NULL;
|
|
|
|
if (static_mapinfo != NULL) {
|
|
dynamic_mapinfo = open_dynamic_archive();
|
|
|
|
// First try to map at the requested address
|
|
result = map_archives(static_mapinfo, dynamic_mapinfo, true);
|
|
if (result == MAP_ARCHIVE_MMAP_FAILURE) {
|
|
// Mapping has failed (probably due to ASLR). Let's map at an address chosen
|
|
// by the OS.
|
|
log_info(cds)("Try to map archive(s) at an alternative address");
|
|
result = map_archives(static_mapinfo, dynamic_mapinfo, false);
|
|
}
|
|
}
|
|
|
|
if (result == MAP_ARCHIVE_SUCCESS) {
|
|
bool dynamic_mapped = (dynamic_mapinfo != NULL && dynamic_mapinfo->is_mapped());
|
|
char* cds_base = static_mapinfo->mapped_base();
|
|
char* cds_end = dynamic_mapped ? dynamic_mapinfo->mapped_end() : static_mapinfo->mapped_end();
|
|
set_shared_metaspace_range(cds_base, static_mapinfo->mapped_end(), cds_end);
|
|
_relocation_delta = static_mapinfo->relocation_delta();
|
|
if (dynamic_mapped) {
|
|
FileMapInfo::set_shared_path_table(dynamic_mapinfo);
|
|
} else {
|
|
FileMapInfo::set_shared_path_table(static_mapinfo);
|
|
}
|
|
_requested_base_address = static_mapinfo->requested_base_address();
|
|
} else {
|
|
set_shared_metaspace_range(NULL, NULL, NULL);
|
|
UseSharedSpaces = false;
|
|
FileMapInfo::fail_continue("Unable to map shared spaces");
|
|
if (PrintSharedArchiveAndExit) {
|
|
vm_exit_during_initialization("Unable to use shared archive.");
|
|
}
|
|
}
|
|
|
|
if (static_mapinfo != NULL && !static_mapinfo->is_mapped()) {
|
|
delete static_mapinfo;
|
|
}
|
|
if (dynamic_mapinfo != NULL && !dynamic_mapinfo->is_mapped()) {
|
|
delete dynamic_mapinfo;
|
|
}
|
|
}
|
|
|
|
FileMapInfo* MetaspaceShared::open_static_archive() {
|
|
FileMapInfo* mapinfo = new FileMapInfo(true);
|
|
if (!mapinfo->initialize()) {
|
|
delete(mapinfo);
|
|
return NULL;
|
|
}
|
|
return mapinfo;
|
|
}
|
|
|
|
FileMapInfo* MetaspaceShared::open_dynamic_archive() {
|
|
if (DynamicDumpSharedSpaces) {
|
|
return NULL;
|
|
}
|
|
if (Arguments::GetSharedDynamicArchivePath() == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
FileMapInfo* mapinfo = new FileMapInfo(false);
|
|
if (!mapinfo->initialize()) {
|
|
delete(mapinfo);
|
|
return NULL;
|
|
}
|
|
return mapinfo;
|
|
}
|
|
|
|
// use_requested_addr:
|
|
// true = map at FileMapHeader::_requested_base_address
|
|
// false = map at an alternative address picked by OS.
|
|
MapArchiveResult MetaspaceShared::map_archives(FileMapInfo* static_mapinfo, FileMapInfo* dynamic_mapinfo,
|
|
bool use_requested_addr) {
|
|
if (use_requested_addr && static_mapinfo->requested_base_address() == NULL) {
|
|
log_info(cds)("Archive(s) were created with -XX:SharedBaseAddress=0. Always map at os-selected address.");
|
|
return MAP_ARCHIVE_MMAP_FAILURE;
|
|
}
|
|
|
|
PRODUCT_ONLY(if (ArchiveRelocationMode == 1 && use_requested_addr) {
|
|
// For product build only -- this is for benchmarking the cost of doing relocation.
|
|
// For debug builds, the check is done below, after reserving the space, for better test coverage
|
|
// (see comment below).
|
|
log_info(cds)("ArchiveRelocationMode == 1: always map archive(s) at an alternative address");
|
|
return MAP_ARCHIVE_MMAP_FAILURE;
|
|
});
|
|
|
|
if (ArchiveRelocationMode == 2 && !use_requested_addr) {
|
|
log_info(cds)("ArchiveRelocationMode == 2: never map archive(s) at an alternative address");
|
|
return MAP_ARCHIVE_MMAP_FAILURE;
|
|
};
|
|
|
|
if (dynamic_mapinfo != NULL) {
|
|
// Ensure that the OS won't be able to allocate new memory spaces between the two
|
|
// archives, or else it would mess up the simple comparision in MetaspaceObj::is_shared().
|
|
assert(static_mapinfo->mapping_end_offset() == dynamic_mapinfo->mapping_base_offset(), "no gap");
|
|
}
|
|
|
|
ReservedSpace archive_space_rs, class_space_rs;
|
|
MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
|
|
char* mapped_base_address = reserve_address_space_for_archives(static_mapinfo, dynamic_mapinfo,
|
|
use_requested_addr, archive_space_rs,
|
|
class_space_rs);
|
|
if (mapped_base_address == NULL) {
|
|
result = MAP_ARCHIVE_MMAP_FAILURE;
|
|
log_debug(cds)("Failed to reserve spaces (use_requested_addr=%u)", (unsigned)use_requested_addr);
|
|
} else {
|
|
|
|
#ifdef ASSERT
|
|
// Some sanity checks after reserving address spaces for archives
|
|
// and class space.
|
|
assert(archive_space_rs.is_reserved(), "Sanity");
|
|
if (Metaspace::using_class_space()) {
|
|
// Class space must closely follow the archive space. Both spaces
|
|
// must be aligned correctly.
|
|
assert(class_space_rs.is_reserved(),
|
|
"A class space should have been reserved");
|
|
assert(class_space_rs.base() >= archive_space_rs.end(),
|
|
"class space should follow the cds archive space");
|
|
assert(is_aligned(archive_space_rs.base(),
|
|
MetaspaceShared::reserved_space_alignment()),
|
|
"Archive space misaligned");
|
|
assert(is_aligned(class_space_rs.base(),
|
|
Metaspace::reserve_alignment()),
|
|
"class space misaligned");
|
|
}
|
|
#endif // ASSERT
|
|
|
|
log_debug(cds)("Reserved archive_space_rs [" INTPTR_FORMAT " - " INTPTR_FORMAT "] (" SIZE_FORMAT ") bytes",
|
|
p2i(archive_space_rs.base()), p2i(archive_space_rs.end()), archive_space_rs.size());
|
|
log_debug(cds)("Reserved class_space_rs [" INTPTR_FORMAT " - " INTPTR_FORMAT "] (" SIZE_FORMAT ") bytes",
|
|
p2i(class_space_rs.base()), p2i(class_space_rs.end()), class_space_rs.size());
|
|
|
|
if (MetaspaceShared::use_windows_memory_mapping()) {
|
|
// We have now reserved address space for the archives, and will map in
|
|
// the archive files into this space.
|
|
//
|
|
// Special handling for Windows: on Windows we cannot map a file view
|
|
// into an existing memory mapping. So, we unmap the address range we
|
|
// just reserved again, which will make it available for mapping the
|
|
// archives.
|
|
// Reserving this range has not been for naught however since it makes
|
|
// us reasonably sure the address range is available.
|
|
//
|
|
// But still it may fail, since between unmapping the range and mapping
|
|
// in the archive someone else may grab the address space. Therefore
|
|
// there is a fallback in FileMap::map_region() where we just read in
|
|
// the archive files sequentially instead of mapping it in. We couple
|
|
// this with use_requested_addr, since we're going to patch all the
|
|
// pointers anyway so there's no benefit to mmap.
|
|
if (use_requested_addr) {
|
|
log_info(cds)("Windows mmap workaround: releasing archive space.");
|
|
archive_space_rs.release();
|
|
}
|
|
}
|
|
MapArchiveResult static_result = map_archive(static_mapinfo, mapped_base_address, archive_space_rs);
|
|
MapArchiveResult dynamic_result = (static_result == MAP_ARCHIVE_SUCCESS) ?
|
|
map_archive(dynamic_mapinfo, mapped_base_address, archive_space_rs) : MAP_ARCHIVE_OTHER_FAILURE;
|
|
|
|
DEBUG_ONLY(if (ArchiveRelocationMode == 1 && use_requested_addr) {
|
|
// This is for simulating mmap failures at the requested address. In
|
|
// debug builds, we do it here (after all archives have possibly been
|
|
// mapped), so we can thoroughly test the code for failure handling
|
|
// (releasing all allocated resource, etc).
|
|
log_info(cds)("ArchiveRelocationMode == 1: always map archive(s) at an alternative address");
|
|
if (static_result == MAP_ARCHIVE_SUCCESS) {
|
|
static_result = MAP_ARCHIVE_MMAP_FAILURE;
|
|
}
|
|
if (dynamic_result == MAP_ARCHIVE_SUCCESS) {
|
|
dynamic_result = MAP_ARCHIVE_MMAP_FAILURE;
|
|
}
|
|
});
|
|
|
|
if (static_result == MAP_ARCHIVE_SUCCESS) {
|
|
if (dynamic_result == MAP_ARCHIVE_SUCCESS) {
|
|
result = MAP_ARCHIVE_SUCCESS;
|
|
} else if (dynamic_result == MAP_ARCHIVE_OTHER_FAILURE) {
|
|
assert(dynamic_mapinfo != NULL && !dynamic_mapinfo->is_mapped(), "must have failed");
|
|
// No need to retry mapping the dynamic archive again, as it will never succeed
|
|
// (bad file, etc) -- just keep the base archive.
|
|
log_warning(cds, dynamic)("Unable to use shared archive. The top archive failed to load: %s",
|
|
dynamic_mapinfo->full_path());
|
|
result = MAP_ARCHIVE_SUCCESS;
|
|
// TODO, we can give the unused space for the dynamic archive to class_space_rs, but there's no
|
|
// easy API to do that right now.
|
|
} else {
|
|
result = MAP_ARCHIVE_MMAP_FAILURE;
|
|
}
|
|
} else if (static_result == MAP_ARCHIVE_OTHER_FAILURE) {
|
|
result = MAP_ARCHIVE_OTHER_FAILURE;
|
|
} else {
|
|
result = MAP_ARCHIVE_MMAP_FAILURE;
|
|
}
|
|
}
|
|
|
|
if (result == MAP_ARCHIVE_SUCCESS) {
|
|
SharedBaseAddress = (size_t)mapped_base_address;
|
|
LP64_ONLY({
|
|
if (Metaspace::using_class_space()) {
|
|
// Set up ccs in metaspace.
|
|
Metaspace::initialize_class_space(class_space_rs);
|
|
|
|
// Set up compressed Klass pointer encoding: the encoding range must
|
|
// cover both archive and class space.
|
|
address cds_base = (address)static_mapinfo->mapped_base();
|
|
address ccs_end = (address)class_space_rs.end();
|
|
CompressedKlassPointers::initialize(cds_base, ccs_end - cds_base);
|
|
|
|
// map_heap_regions() compares the current narrow oop and klass encodings
|
|
// with the archived ones, so it must be done after all encodings are determined.
|
|
static_mapinfo->map_heap_regions();
|
|
}
|
|
});
|
|
log_info(cds)("optimized module handling: %s", MetaspaceShared::use_optimized_module_handling() ? "enabled" : "disabled");
|
|
log_info(cds)("full module graph: %s", MetaspaceShared::use_full_module_graph() ? "enabled" : "disabled");
|
|
} else {
|
|
unmap_archive(static_mapinfo);
|
|
unmap_archive(dynamic_mapinfo);
|
|
release_reserved_spaces(archive_space_rs, class_space_rs);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
// This will reserve two address spaces suitable to house Klass structures, one
|
|
// for the cds archives (static archive and optionally dynamic archive) and
|
|
// optionally one move for ccs.
|
|
//
|
|
// Since both spaces must fall within the compressed class pointer encoding
|
|
// range, they are allocated close to each other.
|
|
//
|
|
// Space for archives will be reserved first, followed by a potential gap,
|
|
// followed by the space for ccs:
|
|
//
|
|
// +-- Base address A B End
|
|
// | | | |
|
|
// v v v v
|
|
// +-------------+--------------+ +----------------------+
|
|
// | static arc | [dyn. arch] | [gap] | compr. class space |
|
|
// +-------------+--------------+ +----------------------+
|
|
//
|
|
// (The gap may result from different alignment requirements between metaspace
|
|
// and CDS)
|
|
//
|
|
// If UseCompressedClassPointers is disabled, only one address space will be
|
|
// reserved:
|
|
//
|
|
// +-- Base address End
|
|
// | |
|
|
// v v
|
|
// +-------------+--------------+
|
|
// | static arc | [dyn. arch] |
|
|
// +-------------+--------------+
|
|
//
|
|
// Base address: If use_archive_base_addr address is true, the Base address is
|
|
// determined by the address stored in the static archive. If
|
|
// use_archive_base_addr address is false, this base address is determined
|
|
// by the platform.
|
|
//
|
|
// If UseCompressedClassPointers=1, the range encompassing both spaces will be
|
|
// suitable to en/decode narrow Klass pointers: the base will be valid for
|
|
// encoding, the range [Base, End) not surpass KlassEncodingMetaspaceMax.
|
|
//
|
|
// Return:
|
|
//
|
|
// - On success:
|
|
// - archive_space_rs will be reserved and large enough to host static and
|
|
// if needed dynamic archive: [Base, A).
|
|
// archive_space_rs.base and size will be aligned to CDS reserve
|
|
// granularity.
|
|
// - class_space_rs: If UseCompressedClassPointers=1, class_space_rs will
|
|
// be reserved. Its start address will be aligned to metaspace reserve
|
|
// alignment, which may differ from CDS alignment. It will follow the cds
|
|
// archive space, close enough such that narrow class pointer encoding
|
|
// covers both spaces.
|
|
// If UseCompressedClassPointers=0, class_space_rs remains unreserved.
|
|
// - On error: NULL is returned and the spaces remain unreserved.
|
|
char* MetaspaceShared::reserve_address_space_for_archives(FileMapInfo* static_mapinfo,
|
|
FileMapInfo* dynamic_mapinfo,
|
|
bool use_archive_base_addr,
|
|
ReservedSpace& archive_space_rs,
|
|
ReservedSpace& class_space_rs) {
|
|
|
|
address const base_address = (address) (use_archive_base_addr ? static_mapinfo->requested_base_address() : NULL);
|
|
const size_t archive_space_alignment = MetaspaceShared::reserved_space_alignment();
|
|
|
|
// Size and requested location of the archive_space_rs (for both static and dynamic archives)
|
|
assert(static_mapinfo->mapping_base_offset() == 0, "Must be");
|
|
size_t archive_end_offset = (dynamic_mapinfo == NULL) ? static_mapinfo->mapping_end_offset() : dynamic_mapinfo->mapping_end_offset();
|
|
size_t archive_space_size = align_up(archive_end_offset, archive_space_alignment);
|
|
|
|
// If a base address is given, it must have valid alignment and be suitable as encoding base.
|
|
if (base_address != NULL) {
|
|
assert(is_aligned(base_address, archive_space_alignment),
|
|
"Archive base address invalid: " PTR_FORMAT ".", p2i(base_address));
|
|
if (Metaspace::using_class_space()) {
|
|
assert(CompressedKlassPointers::is_valid_base(base_address),
|
|
"Archive base address invalid: " PTR_FORMAT ".", p2i(base_address));
|
|
}
|
|
}
|
|
|
|
if (!Metaspace::using_class_space()) {
|
|
// Get the simple case out of the way first:
|
|
// no compressed class space, simple allocation.
|
|
archive_space_rs = ReservedSpace(archive_space_size, archive_space_alignment,
|
|
false /* bool large */, (char*)base_address);
|
|
if (archive_space_rs.is_reserved()) {
|
|
assert(base_address == NULL ||
|
|
(address)archive_space_rs.base() == base_address, "Sanity");
|
|
// Register archive space with NMT.
|
|
MemTracker::record_virtual_memory_type(archive_space_rs.base(), mtClassShared);
|
|
return archive_space_rs.base();
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
#ifdef _LP64
|
|
|
|
// Complex case: two spaces adjacent to each other, both to be addressable
|
|
// with narrow class pointers.
|
|
// We reserve the whole range spanning both spaces, then split that range up.
|
|
|
|
const size_t class_space_alignment = Metaspace::reserve_alignment();
|
|
|
|
// To simplify matters, lets assume that metaspace alignment will always be
|
|
// equal or a multiple of archive alignment.
|
|
assert(is_power_of_2(class_space_alignment) &&
|
|
is_power_of_2(archive_space_alignment) &&
|
|
class_space_alignment >= archive_space_alignment,
|
|
"Sanity");
|
|
|
|
const size_t class_space_size = CompressedClassSpaceSize;
|
|
assert(CompressedClassSpaceSize > 0 &&
|
|
is_aligned(CompressedClassSpaceSize, class_space_alignment),
|
|
"CompressedClassSpaceSize malformed: "
|
|
SIZE_FORMAT, CompressedClassSpaceSize);
|
|
|
|
const size_t ccs_begin_offset = align_up(base_address + archive_space_size,
|
|
class_space_alignment) - base_address;
|
|
const size_t gap_size = ccs_begin_offset - archive_space_size;
|
|
|
|
const size_t total_range_size =
|
|
align_up(archive_space_size + gap_size + class_space_size,
|
|
os::vm_allocation_granularity());
|
|
|
|
ReservedSpace total_rs;
|
|
if (base_address != NULL) {
|
|
// Reserve at the given archive base address, or not at all.
|
|
total_rs = ReservedSpace(total_range_size, archive_space_alignment,
|
|
false /* bool large */, (char*) base_address);
|
|
} else {
|
|
// Reserve at any address, but leave it up to the platform to choose a good one.
|
|
total_rs = Metaspace::reserve_address_space_for_compressed_classes(total_range_size);
|
|
}
|
|
|
|
if (!total_rs.is_reserved()) {
|
|
return NULL;
|
|
}
|
|
|
|
// Paranoid checks:
|
|
assert(base_address == NULL || (address)total_rs.base() == base_address,
|
|
"Sanity (" PTR_FORMAT " vs " PTR_FORMAT ")", p2i(base_address), p2i(total_rs.base()));
|
|
assert(is_aligned(total_rs.base(), archive_space_alignment), "Sanity");
|
|
assert(total_rs.size() == total_range_size, "Sanity");
|
|
assert(CompressedKlassPointers::is_valid_base((address)total_rs.base()), "Sanity");
|
|
|
|
// Now split up the space into ccs and cds archive. For simplicity, just leave
|
|
// the gap reserved at the end of the archive space.
|
|
archive_space_rs = total_rs.first_part(ccs_begin_offset,
|
|
(size_t)os::vm_allocation_granularity(),
|
|
/*split=*/true);
|
|
class_space_rs = total_rs.last_part(ccs_begin_offset);
|
|
|
|
assert(is_aligned(archive_space_rs.base(), archive_space_alignment), "Sanity");
|
|
assert(is_aligned(archive_space_rs.size(), archive_space_alignment), "Sanity");
|
|
assert(is_aligned(class_space_rs.base(), class_space_alignment), "Sanity");
|
|
assert(is_aligned(class_space_rs.size(), class_space_alignment), "Sanity");
|
|
|
|
// NMT: fix up the space tags
|
|
MemTracker::record_virtual_memory_type(archive_space_rs.base(), mtClassShared);
|
|
MemTracker::record_virtual_memory_type(class_space_rs.base(), mtClass);
|
|
|
|
return archive_space_rs.base();
|
|
|
|
#else
|
|
ShouldNotReachHere();
|
|
return NULL;
|
|
#endif
|
|
|
|
}
|
|
|
|
void MetaspaceShared::release_reserved_spaces(ReservedSpace& archive_space_rs,
|
|
ReservedSpace& class_space_rs) {
|
|
if (archive_space_rs.is_reserved()) {
|
|
log_debug(cds)("Released shared space (archive) " INTPTR_FORMAT, p2i(archive_space_rs.base()));
|
|
archive_space_rs.release();
|
|
}
|
|
if (class_space_rs.is_reserved()) {
|
|
log_debug(cds)("Released shared space (classes) " INTPTR_FORMAT, p2i(class_space_rs.base()));
|
|
class_space_rs.release();
|
|
}
|
|
}
|
|
|
|
static int archive_regions[] = {MetaspaceShared::mc,
|
|
MetaspaceShared::rw,
|
|
MetaspaceShared::ro};
|
|
static int archive_regions_count = 3;
|
|
|
|
MapArchiveResult MetaspaceShared::map_archive(FileMapInfo* mapinfo, char* mapped_base_address, ReservedSpace rs) {
|
|
assert(UseSharedSpaces, "must be runtime");
|
|
if (mapinfo == NULL) {
|
|
return MAP_ARCHIVE_SUCCESS; // The dynamic archive has not been specified. No error has happened -- trivially succeeded.
|
|
}
|
|
|
|
mapinfo->set_is_mapped(false);
|
|
|
|
if (mapinfo->alignment() != (size_t)os::vm_allocation_granularity()) {
|
|
log_error(cds)("Unable to map CDS archive -- os::vm_allocation_granularity() expected: " SIZE_FORMAT
|
|
" actual: %d", mapinfo->alignment(), os::vm_allocation_granularity());
|
|
return MAP_ARCHIVE_OTHER_FAILURE;
|
|
}
|
|
|
|
MapArchiveResult result =
|
|
mapinfo->map_regions(archive_regions, archive_regions_count, mapped_base_address, rs);
|
|
|
|
if (result != MAP_ARCHIVE_SUCCESS) {
|
|
unmap_archive(mapinfo);
|
|
return result;
|
|
}
|
|
|
|
if (!mapinfo->validate_shared_path_table()) {
|
|
unmap_archive(mapinfo);
|
|
return MAP_ARCHIVE_OTHER_FAILURE;
|
|
}
|
|
|
|
mapinfo->set_is_mapped(true);
|
|
return MAP_ARCHIVE_SUCCESS;
|
|
}
|
|
|
|
void MetaspaceShared::unmap_archive(FileMapInfo* mapinfo) {
|
|
assert(UseSharedSpaces, "must be runtime");
|
|
if (mapinfo != NULL) {
|
|
mapinfo->unmap_regions(archive_regions, archive_regions_count);
|
|
mapinfo->set_is_mapped(false);
|
|
}
|
|
}
|
|
|
|
// Read the miscellaneous data from the shared file, and
|
|
// serialize it out to its various destinations.
|
|
|
|
void MetaspaceShared::initialize_shared_spaces() {
|
|
FileMapInfo *static_mapinfo = FileMapInfo::current_info();
|
|
_i2i_entry_code_buffers = static_mapinfo->i2i_entry_code_buffers();
|
|
|
|
// Verify various attributes of the archive, plus initialize the
|
|
// shared string/symbol tables
|
|
char* buffer = static_mapinfo->serialized_data();
|
|
intptr_t* array = (intptr_t*)buffer;
|
|
ReadClosure rc(&array);
|
|
serialize(&rc);
|
|
|
|
// Initialize the run-time symbol table.
|
|
SymbolTable::create_table();
|
|
|
|
static_mapinfo->patch_archived_heap_embedded_pointers();
|
|
|
|
// Close the mapinfo file
|
|
static_mapinfo->close();
|
|
|
|
static_mapinfo->unmap_region(MetaspaceShared::bm);
|
|
|
|
FileMapInfo *dynamic_mapinfo = FileMapInfo::dynamic_info();
|
|
if (dynamic_mapinfo != NULL) {
|
|
intptr_t* buffer = (intptr_t*)dynamic_mapinfo->serialized_data();
|
|
ReadClosure rc(&buffer);
|
|
SymbolTable::serialize_shared_table_header(&rc, false);
|
|
SystemDictionaryShared::serialize_dictionary_headers(&rc, false);
|
|
dynamic_mapinfo->close();
|
|
dynamic_mapinfo->unmap_region(MetaspaceShared::bm);
|
|
}
|
|
|
|
if (PrintSharedArchiveAndExit) {
|
|
if (PrintSharedDictionary) {
|
|
tty->print_cr("\nShared classes:\n");
|
|
SystemDictionaryShared::print_on(tty);
|
|
}
|
|
if (FileMapInfo::current_info() == NULL || _archive_loading_failed) {
|
|
tty->print_cr("archive is invalid");
|
|
vm_exit(1);
|
|
} else {
|
|
tty->print_cr("archive is valid");
|
|
vm_exit(0);
|
|
}
|
|
}
|
|
}
|
|
|
|
// JVM/TI RedefineClasses() support:
|
|
bool MetaspaceShared::remap_shared_readonly_as_readwrite() {
|
|
assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
|
|
|
|
if (UseSharedSpaces) {
|
|
// remap the shared readonly space to shared readwrite, private
|
|
FileMapInfo* mapinfo = FileMapInfo::current_info();
|
|
if (!mapinfo->remap_shared_readonly_as_readwrite()) {
|
|
return false;
|
|
}
|
|
if (FileMapInfo::dynamic_info() != NULL) {
|
|
mapinfo = FileMapInfo::dynamic_info();
|
|
if (!mapinfo->remap_shared_readonly_as_readwrite()) {
|
|
return false;
|
|
}
|
|
}
|
|
_remapped_readwrite = true;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void MetaspaceShared::report_out_of_space(const char* name, size_t needed_bytes) {
|
|
// This is highly unlikely to happen on 64-bits because we have reserved a 4GB space.
|
|
// On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes
|
|
// or so.
|
|
_mc_region.print_out_of_space_msg(name, needed_bytes);
|
|
_rw_region.print_out_of_space_msg(name, needed_bytes);
|
|
_ro_region.print_out_of_space_msg(name, needed_bytes);
|
|
|
|
vm_exit_during_initialization(err_msg("Unable to allocate from '%s' region", name),
|
|
"Please reduce the number of shared classes.");
|
|
}
|
|
|
|
// This is used to relocate the pointers so that the base archive can be mapped at
|
|
// MetaspaceShared::requested_base_address() without runtime relocation.
|
|
intx MetaspaceShared::final_delta() {
|
|
return intx(MetaspaceShared::requested_base_address()) // We want the base archive to be mapped to here at runtime
|
|
- intx(SharedBaseAddress); // .. but the base archive is mapped at here at dump time
|
|
}
|
|
|
|
bool MetaspaceShared::use_full_module_graph() {
|
|
bool result = _use_optimized_module_handling && _use_full_module_graph &&
|
|
(UseSharedSpaces || DumpSharedSpaces) && HeapShared::is_heap_object_archiving_allowed();
|
|
if (result && UseSharedSpaces) {
|
|
// Classes used by the archived full module graph are loaded in JVMTI early phase.
|
|
assert(!(JvmtiExport::should_post_class_file_load_hook() && JvmtiExport::has_early_class_hook_env()),
|
|
"CDS should be disabled if early class hooks are enabled");
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void MetaspaceShared::print_on(outputStream* st) {
|
|
if (UseSharedSpaces || DumpSharedSpaces) {
|
|
st->print("CDS archive(s) mapped at: ");
|
|
address base;
|
|
address top;
|
|
if (UseSharedSpaces) { // Runtime
|
|
base = (address)MetaspaceObj::shared_metaspace_base();
|
|
address static_top = (address)_shared_metaspace_static_top;
|
|
top = (address)MetaspaceObj::shared_metaspace_top();
|
|
st->print("[" PTR_FORMAT "-" PTR_FORMAT "-" PTR_FORMAT "), ", p2i(base), p2i(static_top), p2i(top));
|
|
} else if (DumpSharedSpaces) { // Dump Time
|
|
base = (address)_shared_rs.base();
|
|
top = (address)_shared_rs.end();
|
|
st->print("[" PTR_FORMAT "-" PTR_FORMAT "), ", p2i(base), p2i(top));
|
|
}
|
|
st->print("size " SIZE_FORMAT ", ", top - base);
|
|
st->print("SharedBaseAddress: " PTR_FORMAT ", ArchiveRelocationMode: %d.", SharedBaseAddress, (int)ArchiveRelocationMode);
|
|
} else {
|
|
st->print("CDS disabled.");
|
|
}
|
|
st->cr();
|
|
}
|