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c8656449c2
Co-authored-by: Axel Boldt-Christmas <aboldtch@openjdk.org> Co-authored-by: Joel Sikström <jsikstro@openjdk.org> Co-authored-by: Stefan Karlsson <stefank@openjdk.org> Reviewed-by: aboldtch, iklam, kvn
2049 lines
83 KiB
C++
2049 lines
83 KiB
C++
/*
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* Copyright (c) 2003, 2025, 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 "cds/aotClassLocation.hpp"
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#include "cds/aotLogging.hpp"
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#include "cds/aotMappedHeapLoader.hpp"
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#include "cds/aotMappedHeapWriter.hpp"
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#include "cds/aotMetaspace.hpp"
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#include "cds/archiveBuilder.hpp"
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#include "cds/archiveUtils.inline.hpp"
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#include "cds/cds_globals.hpp"
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#include "cds/cdsConfig.hpp"
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#include "cds/dynamicArchive.hpp"
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#include "cds/filemap.hpp"
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#include "cds/heapShared.inline.hpp"
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#include "classfile/altHashing.hpp"
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#include "classfile/classFileStream.hpp"
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#include "classfile/classLoader.hpp"
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#include "classfile/classLoader.inline.hpp"
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#include "classfile/classLoaderData.inline.hpp"
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#include "classfile/symbolTable.hpp"
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#include "classfile/systemDictionaryShared.hpp"
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#include "classfile/vmClasses.hpp"
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#include "classfile/vmSymbols.hpp"
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#include "compiler/compilerDefinitions.inline.hpp"
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#include "jvm.h"
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#include "logging/log.hpp"
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#include "logging/logMessage.hpp"
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#include "logging/logStream.hpp"
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#include "memory/iterator.inline.hpp"
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#include "memory/metadataFactory.hpp"
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#include "memory/metaspaceClosure.hpp"
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#include "memory/oopFactory.hpp"
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#include "memory/universe.hpp"
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#include "nmt/memTracker.hpp"
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#include "oops/access.hpp"
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#include "oops/compressedKlass.hpp"
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#include "oops/compressedOops.hpp"
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#include "oops/compressedOops.inline.hpp"
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#include "oops/objArrayOop.hpp"
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#include "oops/oop.inline.hpp"
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#include "oops/trainingData.hpp"
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#include "oops/typeArrayKlass.hpp"
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#include "prims/jvmtiExport.hpp"
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#include "runtime/arguments.hpp"
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#include "runtime/globals_extension.hpp"
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#include "runtime/java.hpp"
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#include "runtime/javaCalls.hpp"
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#include "runtime/mutexLocker.hpp"
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#include "runtime/os.hpp"
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#include "runtime/vm_version.hpp"
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#include "utilities/align.hpp"
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#include "utilities/bitMap.inline.hpp"
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#include "utilities/classpathStream.hpp"
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#include "utilities/defaultStream.hpp"
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#include "utilities/ostream.hpp"
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#if INCLUDE_G1GC
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#include "gc/g1/g1CollectedHeap.hpp"
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#include "gc/g1/g1HeapRegion.hpp"
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#endif
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#include <errno.h>
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#include <sys/stat.h>
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#ifndef O_BINARY // if defined (Win32) use binary files.
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#define O_BINARY 0 // otherwise do nothing.
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#endif
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// Fill in the fileMapInfo structure with data about this VM instance.
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// This method copies the vm version info into header_version. If the version is too
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// long then a truncated version, which has a hash code appended to it, is copied.
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//
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// Using a template enables this method to verify that header_version is an array of
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// length JVM_IDENT_MAX. This ensures that the code that writes to the CDS file and
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// the code that reads the CDS file will both use the same size buffer. Hence, will
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// use identical truncation. This is necessary for matching of truncated versions.
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template <int N> static void get_header_version(char (&header_version) [N]) {
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assert(N == JVM_IDENT_MAX, "Bad header_version size");
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const char *vm_version = VM_Version::internal_vm_info_string();
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const int version_len = (int)strlen(vm_version);
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memset(header_version, 0, JVM_IDENT_MAX);
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if (version_len < (JVM_IDENT_MAX-1)) {
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strcpy(header_version, vm_version);
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} else {
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// Get the hash value. Use a static seed because the hash needs to return the same
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// value over multiple jvm invocations.
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uint32_t hash = AltHashing::halfsiphash_32(8191, (const uint8_t*)vm_version, version_len);
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// Truncate the ident, saving room for the 8 hex character hash value.
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strncpy(header_version, vm_version, JVM_IDENT_MAX-9);
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// Append the hash code as eight hex digits.
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os::snprintf_checked(&header_version[JVM_IDENT_MAX-9], 9, "%08x", hash);
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}
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assert(header_version[JVM_IDENT_MAX-1] == 0, "must be");
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}
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FileMapInfo::FileMapInfo(const char* full_path, bool is_static) :
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_is_static(is_static), _file_open(false), _is_mapped(false), _fd(-1), _file_offset(0),
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_full_path(full_path), _base_archive_name(nullptr), _header(nullptr) {
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if (_is_static) {
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assert(_current_info == nullptr, "must be singleton"); // not thread safe
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_current_info = this;
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} else {
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assert(_dynamic_archive_info == nullptr, "must be singleton"); // not thread safe
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_dynamic_archive_info = this;
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}
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}
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FileMapInfo::~FileMapInfo() {
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if (_is_static) {
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assert(_current_info == this, "must be singleton"); // not thread safe
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_current_info = nullptr;
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} else {
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assert(_dynamic_archive_info == this, "must be singleton"); // not thread safe
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_dynamic_archive_info = nullptr;
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}
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if (_header != nullptr) {
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os::free(_header);
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}
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if (_file_open) {
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::close(_fd);
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}
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}
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void FileMapInfo::free_current_info() {
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assert(CDSConfig::is_dumping_final_static_archive(), "only supported in this mode");
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assert(_current_info != nullptr, "sanity");
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delete _current_info;
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assert(_current_info == nullptr, "sanity"); // Side effect expected from the above "delete" operator.
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}
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void FileMapInfo::populate_header(size_t core_region_alignment) {
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assert(_header == nullptr, "Sanity check");
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size_t c_header_size;
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size_t header_size;
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size_t base_archive_name_size = 0;
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size_t base_archive_name_offset = 0;
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if (is_static()) {
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c_header_size = sizeof(FileMapHeader);
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header_size = c_header_size;
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} else {
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// dynamic header including base archive name for non-default base archive
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c_header_size = sizeof(DynamicArchiveHeader);
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header_size = c_header_size;
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const char* default_base_archive_name = CDSConfig::default_archive_path();
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const char* current_base_archive_name = CDSConfig::input_static_archive_path();
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if (!os::same_files(current_base_archive_name, default_base_archive_name)) {
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base_archive_name_size = strlen(current_base_archive_name) + 1;
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header_size += base_archive_name_size;
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base_archive_name_offset = c_header_size;
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}
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}
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_header = (FileMapHeader*)os::malloc(header_size, mtInternal);
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memset((void*)_header, 0, header_size);
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_header->populate(this,
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core_region_alignment,
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header_size,
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base_archive_name_size,
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base_archive_name_offset);
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}
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void FileMapHeader::populate(FileMapInfo *info, size_t core_region_alignment,
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size_t header_size, size_t base_archive_name_size,
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size_t base_archive_name_offset) {
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// 1. We require _generic_header._magic to be at the beginning of the file
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// 2. FileMapHeader also assumes that _generic_header is at the beginning of the file
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assert(offset_of(FileMapHeader, _generic_header) == 0, "must be");
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set_header_size((unsigned int)header_size);
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set_base_archive_name_offset((unsigned int)base_archive_name_offset);
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set_base_archive_name_size((unsigned int)base_archive_name_size);
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if (CDSConfig::is_dumping_dynamic_archive()) {
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set_magic(CDS_DYNAMIC_ARCHIVE_MAGIC);
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} else if (CDSConfig::is_dumping_preimage_static_archive()) {
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set_magic(CDS_PREIMAGE_ARCHIVE_MAGIC);
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} else {
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set_magic(CDS_ARCHIVE_MAGIC);
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}
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set_version(CURRENT_CDS_ARCHIVE_VERSION);
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if (!info->is_static() && base_archive_name_size != 0) {
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// copy base archive name
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copy_base_archive_name(CDSConfig::input_static_archive_path());
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}
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_core_region_alignment = core_region_alignment;
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_obj_alignment = ObjectAlignmentInBytes;
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_compact_strings = CompactStrings;
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_compact_headers = UseCompactObjectHeaders;
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if (CDSConfig::is_dumping_heap()) {
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_object_streaming_mode = HeapShared::is_writing_streaming_mode();
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_narrow_oop_mode = CompressedOops::mode();
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_narrow_oop_base = CompressedOops::base();
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_narrow_oop_shift = CompressedOops::shift();
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}
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_compressed_oops = UseCompressedOops;
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_compressed_class_ptrs = UseCompressedClassPointers;
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if (UseCompressedClassPointers) {
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#ifdef _LP64
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_narrow_klass_pointer_bits = CompressedKlassPointers::narrow_klass_pointer_bits();
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_narrow_klass_shift = ArchiveBuilder::precomputed_narrow_klass_shift();
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#endif
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} else {
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_narrow_klass_pointer_bits = _narrow_klass_shift = -1;
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}
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// Which JIT compier is used
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_compiler_type = (u1)CompilerConfig::compiler_type();
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_type_profile_level = TypeProfileLevel;
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_type_profile_args_limit = TypeProfileArgsLimit;
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_type_profile_parms_limit = TypeProfileParmsLimit;
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_type_profile_width = TypeProfileWidth;
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_bci_profile_width = BciProfileWidth;
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_profile_traps = ProfileTraps;
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_type_profile_casts = TypeProfileCasts;
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_spec_trap_limit_extra_entries = SpecTrapLimitExtraEntries;
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_max_heap_size = MaxHeapSize;
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_use_optimized_module_handling = CDSConfig::is_using_optimized_module_handling();
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_has_aot_linked_classes = CDSConfig::is_dumping_aot_linked_classes();
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_has_full_module_graph = CDSConfig::is_dumping_full_module_graph();
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// The following fields are for sanity checks for whether this archive
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// will function correctly with this JVM and the bootclasspath it's
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// invoked with.
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// JVM version string ... changes on each build.
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get_header_version(_jvm_ident);
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_verify_local = BytecodeVerificationLocal;
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_verify_remote = BytecodeVerificationRemote;
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_has_platform_or_app_classes = AOTClassLocationConfig::dumptime()->has_platform_or_app_classes();
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_requested_base_address = (char*)SharedBaseAddress;
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_mapped_base_address = (char*)SharedBaseAddress;
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}
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void FileMapHeader::copy_base_archive_name(const char* archive) {
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assert(base_archive_name_size() != 0, "_base_archive_name_size not set");
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assert(base_archive_name_offset() != 0, "_base_archive_name_offset not set");
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assert(header_size() > sizeof(*this), "_base_archive_name_size not included in header size?");
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memcpy((char*)this + base_archive_name_offset(), archive, base_archive_name_size());
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}
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void FileMapHeader::print(outputStream* st) {
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ResourceMark rm;
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st->print_cr("- magic: 0x%08x", magic());
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st->print_cr("- crc: 0x%08x", crc());
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st->print_cr("- version: 0x%x", version());
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st->print_cr("- header_size: " UINT32_FORMAT, header_size());
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st->print_cr("- base_archive_name_offset: " UINT32_FORMAT, base_archive_name_offset());
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st->print_cr("- base_archive_name_size: " UINT32_FORMAT, base_archive_name_size());
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for (int i = 0; i < NUM_CDS_REGIONS; i++) {
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FileMapRegion* r = region_at(i);
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r->print(st, i);
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}
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st->print_cr("============ end regions ======== ");
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st->print_cr("- core_region_alignment: %zu", _core_region_alignment);
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st->print_cr("- obj_alignment: %d", _obj_alignment);
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st->print_cr("- narrow_oop_base: " INTPTR_FORMAT, p2i(_narrow_oop_base));
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st->print_cr("- narrow_oop_shift %d", _narrow_oop_shift);
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st->print_cr("- compact_strings: %d", _compact_strings);
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st->print_cr("- compact_headers: %d", _compact_headers);
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st->print_cr("- max_heap_size: %zu", _max_heap_size);
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st->print_cr("- narrow_oop_mode: %d", _narrow_oop_mode);
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st->print_cr("- compressed_oops: %d", _compressed_oops);
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st->print_cr("- compressed_class_ptrs: %d", _compressed_class_ptrs);
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st->print_cr("- narrow_klass_pointer_bits: %d", _narrow_klass_pointer_bits);
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st->print_cr("- narrow_klass_shift: %d", _narrow_klass_shift);
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st->print_cr("- cloned_vtables_offset: 0x%zx", _cloned_vtables_offset);
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st->print_cr("- early_serialized_data_offset: 0x%zx", _early_serialized_data_offset);
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st->print_cr("- serialized_data_offset: 0x%zx", _serialized_data_offset);
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st->print_cr("- jvm_ident: %s", _jvm_ident);
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st->print_cr("- class_location_config_offset: 0x%zx", _class_location_config_offset);
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st->print_cr("- verify_local: %d", _verify_local);
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st->print_cr("- verify_remote: %d", _verify_remote);
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st->print_cr("- has_platform_or_app_classes: %d", _has_platform_or_app_classes);
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st->print_cr("- requested_base_address: " INTPTR_FORMAT, p2i(_requested_base_address));
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st->print_cr("- mapped_base_address: " INTPTR_FORMAT, p2i(_mapped_base_address));
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st->print_cr("- object_streaming_mode: %d", _object_streaming_mode);
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st->print_cr("- mapped_heap_header");
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st->print_cr(" - root_segments");
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st->print_cr(" - roots_count: %d", _mapped_heap_header.root_segments().roots_count());
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st->print_cr(" - base_offset: 0x%zx", _mapped_heap_header.root_segments().base_offset());
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st->print_cr(" - count: %zu", _mapped_heap_header.root_segments().count());
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st->print_cr(" - max_size_elems: %d", _mapped_heap_header.root_segments().max_size_in_elems());
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st->print_cr(" - max_size_bytes: %zu", _mapped_heap_header.root_segments().max_size_in_bytes());
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st->print_cr(" - oopmap_start_pos: %zu", _mapped_heap_header.oopmap_start_pos());
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st->print_cr(" - oopmap_ptrmap_pos: %zu", _mapped_heap_header.ptrmap_start_pos());
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st->print_cr("- streamed_heap_header");
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st->print_cr(" - forwarding_offset: %zu", _streamed_heap_header.forwarding_offset());
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st->print_cr(" - roots_offset: %zu", _streamed_heap_header.roots_offset());
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st->print_cr(" - num_roots: %zu", _streamed_heap_header.num_roots());
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st->print_cr(" - root_highest_object_index_table_offset: %zu", _streamed_heap_header.root_highest_object_index_table_offset());
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st->print_cr(" - num_archived_objects: %zu", _streamed_heap_header.num_archived_objects());
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st->print_cr("- _rw_ptrmap_start_pos: %zu", _rw_ptrmap_start_pos);
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st->print_cr("- _ro_ptrmap_start_pos: %zu", _ro_ptrmap_start_pos);
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st->print_cr("- use_optimized_module_handling: %d", _use_optimized_module_handling);
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st->print_cr("- has_full_module_graph %d", _has_full_module_graph);
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st->print_cr("- has_aot_linked_classes %d", _has_aot_linked_classes);
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}
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bool FileMapInfo::validate_class_location() {
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assert(CDSConfig::is_using_archive(), "runtime only");
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AOTClassLocationConfig* config = header()->class_location_config();
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bool has_extra_module_paths = false;
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if (!config->validate(full_path(), header()->has_aot_linked_classes(), &has_extra_module_paths)) {
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if (PrintSharedArchiveAndExit) {
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AOTMetaspace::set_archive_loading_failed();
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return true;
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} else {
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return false;
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}
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}
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if (header()->has_full_module_graph() && has_extra_module_paths) {
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CDSConfig::stop_using_optimized_module_handling();
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AOTMetaspace::report_loading_error("optimized module handling: disabled because extra module path(s) are specified");
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}
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if (CDSConfig::is_dumping_dynamic_archive()) {
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// Only support dynamic dumping with the usage of the default CDS archive
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// or a simple base archive.
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// If the base layer archive contains additional path component besides
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// the runtime image and the -cp, dynamic dumping is disabled.
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if (config->num_boot_classpaths() > 0) {
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CDSConfig::disable_dumping_dynamic_archive();
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aot_log_warning(aot)(
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"Dynamic archiving is disabled because base layer archive has appended boot classpath");
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}
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if (config->num_module_paths() > 0) {
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if (has_extra_module_paths) {
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CDSConfig::disable_dumping_dynamic_archive();
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aot_log_warning(aot)(
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"Dynamic archiving is disabled because base layer archive has a different module path");
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}
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}
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}
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#if INCLUDE_JVMTI
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if (_classpath_entries_for_jvmti != nullptr) {
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os::free(_classpath_entries_for_jvmti);
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}
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size_t sz = sizeof(ClassPathEntry*) * AOTClassLocationConfig::runtime()->length();
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_classpath_entries_for_jvmti = (ClassPathEntry**)os::malloc(sz, mtClass);
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memset((void*)_classpath_entries_for_jvmti, 0, sz);
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#endif
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return true;
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}
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// A utility class for reading/validating the GenericCDSFileMapHeader portion of
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// a CDS archive's header. The file header of all CDS archives with versions from
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// CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION (12) are guaranteed to always start
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// with GenericCDSFileMapHeader. This makes it possible to read important information
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// from a CDS archive created by a different version of HotSpot, so that we can
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// automatically regenerate the archive as necessary (JDK-8261455).
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class FileHeaderHelper {
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int _fd;
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bool _is_valid;
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bool _is_static;
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GenericCDSFileMapHeader* _header;
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const char* _archive_name;
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const char* _base_archive_name;
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public:
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FileHeaderHelper(const char* archive_name, bool is_static) {
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_fd = -1;
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_is_valid = false;
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_header = nullptr;
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_base_archive_name = nullptr;
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_archive_name = archive_name;
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_is_static = is_static;
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}
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~FileHeaderHelper() {
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if (_header != nullptr) {
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FREE_C_HEAP_ARRAY(char, _header);
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}
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if (_fd != -1) {
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::close(_fd);
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}
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}
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bool initialize() {
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assert(_archive_name != nullptr, "Archive name is null");
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_fd = os::open(_archive_name, O_RDONLY | O_BINARY, 0);
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if (_fd < 0) {
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AOTMetaspace::report_loading_error("Specified %s not found (%s)", CDSConfig::type_of_archive_being_loaded(), _archive_name);
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return false;
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}
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return initialize(_fd);
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}
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// for an already opened file, do not set _fd
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bool initialize(int fd) {
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assert(_archive_name != nullptr, "Archive name is null");
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assert(fd != -1, "Archive must be opened already");
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// First read the generic header so we know the exact size of the actual header.
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const char* file_type = CDSConfig::type_of_archive_being_loaded();
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GenericCDSFileMapHeader gen_header;
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size_t size = sizeof(GenericCDSFileMapHeader);
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os::lseek(fd, 0, SEEK_SET);
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size_t n = ::read(fd, (void*)&gen_header, (unsigned int)size);
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if (n != size) {
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aot_log_warning(aot)("Unable to read generic CDS file map header from %s", file_type);
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return false;
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}
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if (gen_header._magic != CDS_ARCHIVE_MAGIC &&
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gen_header._magic != CDS_DYNAMIC_ARCHIVE_MAGIC &&
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gen_header._magic != CDS_PREIMAGE_ARCHIVE_MAGIC) {
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aot_log_warning(aot)("The %s has a bad magic number: %#x", file_type, gen_header._magic);
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return false;
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}
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if (gen_header._version < CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION) {
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aot_log_warning(aot)("Cannot handle %s version 0x%x. Must be at least 0x%x.",
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file_type, gen_header._version, CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION);
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return false;
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}
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if (gen_header._version != CURRENT_CDS_ARCHIVE_VERSION) {
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aot_log_warning(aot)("The %s version 0x%x does not match the required version 0x%x.",
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file_type, gen_header._version, CURRENT_CDS_ARCHIVE_VERSION);
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}
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size_t filelen = os::lseek(fd, 0, SEEK_END);
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if (gen_header._header_size >= filelen) {
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aot_log_warning(aot)("Archive file header larger than archive file");
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return false;
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}
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// Read the actual header and perform more checks
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size = gen_header._header_size;
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_header = (GenericCDSFileMapHeader*)NEW_C_HEAP_ARRAY(char, size, mtInternal);
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os::lseek(fd, 0, SEEK_SET);
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n = ::read(fd, (void*)_header, (unsigned int)size);
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if (n != size) {
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aot_log_warning(aot)("Unable to read file map header from %s", file_type);
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return false;
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}
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if (!check_header_crc()) {
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return false;
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}
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if (!check_and_init_base_archive_name()) {
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return false;
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}
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// All fields in the GenericCDSFileMapHeader has been validated.
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_is_valid = true;
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return true;
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}
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GenericCDSFileMapHeader* get_generic_file_header() {
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assert(_header != nullptr && _is_valid, "must be a valid archive file");
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return _header;
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}
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const char* base_archive_name() {
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assert(_header != nullptr && _is_valid, "must be a valid archive file");
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return _base_archive_name;
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}
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bool is_static_archive() const {
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return _header->_magic == CDS_ARCHIVE_MAGIC;
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}
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bool is_dynamic_archive() const {
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return _header->_magic == CDS_DYNAMIC_ARCHIVE_MAGIC;
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}
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bool is_preimage_static_archive() const {
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return _header->_magic == CDS_PREIMAGE_ARCHIVE_MAGIC;
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}
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private:
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bool check_header_crc() const {
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if (VerifySharedSpaces) {
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FileMapHeader* header = (FileMapHeader*)_header;
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int actual_crc = header->compute_crc();
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if (actual_crc != header->crc()) {
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aot_log_info(aot)("_crc expected: %d", header->crc());
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aot_log_info(aot)(" actual: %d", actual_crc);
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aot_log_warning(aot)("Header checksum verification failed.");
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return false;
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}
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}
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return true;
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}
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bool check_and_init_base_archive_name() {
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unsigned int name_offset = _header->_base_archive_name_offset;
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unsigned int name_size = _header->_base_archive_name_size;
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unsigned int header_size = _header->_header_size;
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if (name_offset + name_size < name_offset) {
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aot_log_warning(aot)("base_archive_name offset/size overflow: " UINT32_FORMAT "/" UINT32_FORMAT,
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name_offset, name_size);
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return false;
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}
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if (is_static_archive() || is_preimage_static_archive()) {
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if (name_offset != 0) {
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aot_log_warning(aot)("static shared archive must have zero _base_archive_name_offset");
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return false;
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}
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if (name_size != 0) {
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aot_log_warning(aot)("static shared archive must have zero _base_archive_name_size");
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return false;
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}
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} else {
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assert(is_dynamic_archive(), "must be");
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if ((name_size == 0 && name_offset != 0) ||
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(name_size != 0 && name_offset == 0)) {
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// If either is zero, both must be zero. This indicates that we are using the default base archive.
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aot_log_warning(aot)("Invalid base_archive_name offset/size: " UINT32_FORMAT "/" UINT32_FORMAT,
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name_offset, name_size);
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return false;
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}
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if (name_size > 0) {
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if (name_offset + name_size > header_size) {
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aot_log_warning(aot)("Invalid base_archive_name offset/size (out of range): "
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UINT32_FORMAT " + " UINT32_FORMAT " > " UINT32_FORMAT ,
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name_offset, name_size, header_size);
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return false;
|
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}
|
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const char* name = ((const char*)_header) + _header->_base_archive_name_offset;
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if (name[name_size - 1] != '\0' || strlen(name) != name_size - 1) {
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aot_log_warning(aot)("Base archive name is damaged");
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return false;
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}
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if (!os::file_exists(name)) {
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aot_log_warning(aot)("Base archive %s does not exist", name);
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return false;
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}
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_base_archive_name = name;
|
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}
|
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}
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|
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return true;
|
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}
|
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};
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|
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// Return value:
|
|
// false:
|
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// <archive_name> is not a valid archive. *base_archive_name is set to null.
|
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// true && (*base_archive_name) == nullptr:
|
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// <archive_name> is a valid static archive.
|
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// true && (*base_archive_name) != nullptr:
|
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// <archive_name> is a valid dynamic archive.
|
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bool FileMapInfo::get_base_archive_name_from_header(const char* archive_name,
|
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const char** base_archive_name) {
|
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FileHeaderHelper file_helper(archive_name, false);
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*base_archive_name = nullptr;
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|
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if (!file_helper.initialize()) {
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return false;
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}
|
|
GenericCDSFileMapHeader* header = file_helper.get_generic_file_header();
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switch (header->_magic) {
|
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case CDS_PREIMAGE_ARCHIVE_MAGIC:
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return false; // This is a binary config file, not a proper archive
|
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case CDS_DYNAMIC_ARCHIVE_MAGIC:
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break;
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default:
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assert(header->_magic == CDS_ARCHIVE_MAGIC, "must be");
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if (AutoCreateSharedArchive) {
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aot_log_warning(aot)("AutoCreateSharedArchive is ignored because %s is a static archive", archive_name);
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}
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return true;
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}
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|
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const char* base = file_helper.base_archive_name();
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if (base == nullptr) {
|
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*base_archive_name = CDSConfig::default_archive_path();
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} else {
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*base_archive_name = os::strdup_check_oom(base);
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}
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return true;
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}
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bool FileMapInfo::is_preimage_static_archive(const char* file) {
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FileHeaderHelper file_helper(file, false);
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if (!file_helper.initialize()) {
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return false;
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}
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return file_helper.is_preimage_static_archive();
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}
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// Read the FileMapInfo information from the file.
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|
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bool FileMapInfo::init_from_file(int fd) {
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FileHeaderHelper file_helper(_full_path, _is_static);
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if (!file_helper.initialize(fd)) {
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aot_log_warning(aot)("Unable to read the file header.");
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return false;
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}
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GenericCDSFileMapHeader* gen_header = file_helper.get_generic_file_header();
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|
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const char* file_type = CDSConfig::type_of_archive_being_loaded();
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if (_is_static) {
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if ((gen_header->_magic == CDS_ARCHIVE_MAGIC) ||
|
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(gen_header->_magic == CDS_PREIMAGE_ARCHIVE_MAGIC && CDSConfig::is_dumping_final_static_archive())) {
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// Good
|
|
} else {
|
|
if (CDSConfig::new_aot_flags_used()) {
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aot_log_warning(aot)("Not a valid %s (%s)", file_type, _full_path);
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} else {
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aot_log_warning(aot)("Not a base shared archive: %s", _full_path);
|
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}
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return false;
|
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}
|
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} else {
|
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if (gen_header->_magic != CDS_DYNAMIC_ARCHIVE_MAGIC) {
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aot_log_warning(aot)("Not a top shared archive: %s", _full_path);
|
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return false;
|
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}
|
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}
|
|
|
|
_header = (FileMapHeader*)os::malloc(gen_header->_header_size, mtInternal);
|
|
os::lseek(fd, 0, SEEK_SET); // reset to begin of the archive
|
|
size_t size = gen_header->_header_size;
|
|
size_t n = ::read(fd, (void*)_header, (unsigned int)size);
|
|
if (n != size) {
|
|
aot_log_warning(aot)("Failed to read file header from the top archive file\n");
|
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return false;
|
|
}
|
|
|
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if (header()->version() != CURRENT_CDS_ARCHIVE_VERSION) {
|
|
aot_log_info(aot)("_version expected: 0x%x", CURRENT_CDS_ARCHIVE_VERSION);
|
|
aot_log_info(aot)(" actual: 0x%x", header()->version());
|
|
aot_log_warning(aot)("The %s has the wrong version.", file_type);
|
|
return false;
|
|
}
|
|
|
|
unsigned int base_offset = header()->base_archive_name_offset();
|
|
unsigned int name_size = header()->base_archive_name_size();
|
|
unsigned int header_size = header()->header_size();
|
|
if (base_offset != 0 && name_size != 0) {
|
|
if (header_size != base_offset + name_size) {
|
|
aot_log_info(aot)("_header_size: " UINT32_FORMAT, header_size);
|
|
aot_log_info(aot)("base_archive_name_size: " UINT32_FORMAT, header()->base_archive_name_size());
|
|
aot_log_info(aot)("base_archive_name_offset: " UINT32_FORMAT, header()->base_archive_name_offset());
|
|
aot_log_warning(aot)("The %s has an incorrect header size.", file_type);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
const char* actual_ident = header()->jvm_ident();
|
|
|
|
if (actual_ident[JVM_IDENT_MAX-1] != 0) {
|
|
aot_log_warning(aot)("JVM version identifier is corrupted.");
|
|
return false;
|
|
}
|
|
|
|
char expected_ident[JVM_IDENT_MAX];
|
|
get_header_version(expected_ident);
|
|
if (strncmp(actual_ident, expected_ident, JVM_IDENT_MAX-1) != 0) {
|
|
aot_log_info(aot)("_jvm_ident expected: %s", expected_ident);
|
|
aot_log_info(aot)(" actual: %s", actual_ident);
|
|
aot_log_warning(aot)("The %s was created by a different"
|
|
" version or build of HotSpot", file_type);
|
|
return false;
|
|
}
|
|
|
|
_file_offset = header()->header_size(); // accounts for the size of _base_archive_name
|
|
|
|
size_t len = os::lseek(fd, 0, SEEK_END);
|
|
|
|
for (int i = 0; i < AOTMetaspace::n_regions; i++) {
|
|
FileMapRegion* r = region_at(i);
|
|
if (r->file_offset() > len || len - r->file_offset() < r->used()) {
|
|
aot_log_warning(aot)("The %s has been truncated.", file_type);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void FileMapInfo::seek_to_position(size_t pos) {
|
|
if (os::lseek(_fd, (long)pos, SEEK_SET) < 0) {
|
|
aot_log_error(aot)("Unable to seek to position %zu", pos);
|
|
AOTMetaspace::unrecoverable_loading_error();
|
|
}
|
|
}
|
|
|
|
// Read the FileMapInfo information from the file.
|
|
bool FileMapInfo::open_for_read() {
|
|
if (_file_open) {
|
|
return true;
|
|
}
|
|
const char* file_type = CDSConfig::type_of_archive_being_loaded();
|
|
const char* info = CDSConfig::is_dumping_final_static_archive() ?
|
|
"AOTConfiguration file " : "";
|
|
aot_log_info(aot)("trying to map %s%s", info, _full_path);
|
|
int fd = os::open(_full_path, O_RDONLY | O_BINARY, 0);
|
|
if (fd < 0) {
|
|
if (errno == ENOENT) {
|
|
aot_log_info(aot)("Specified %s not found (%s)", file_type, _full_path);
|
|
} else {
|
|
aot_log_warning(aot)("Failed to open %s (%s)", file_type,
|
|
os::strerror(errno));
|
|
}
|
|
return false;
|
|
} else {
|
|
aot_log_info(aot)("Opened %s %s.", file_type, _full_path);
|
|
}
|
|
|
|
_fd = fd;
|
|
_file_open = true;
|
|
return true;
|
|
}
|
|
|
|
// Write the FileMapInfo information to the file.
|
|
|
|
void FileMapInfo::open_as_output() {
|
|
if (CDSConfig::new_aot_flags_used()) {
|
|
if (CDSConfig::is_dumping_preimage_static_archive()) {
|
|
log_info(aot)("Writing binary AOTConfiguration file: %s", _full_path);
|
|
} else {
|
|
log_info(aot)("Writing AOTCache file: %s", _full_path);
|
|
}
|
|
} else {
|
|
aot_log_info(aot)("Dumping shared data to file: %s", _full_path);
|
|
}
|
|
|
|
#ifdef _WINDOWS // On Windows, need WRITE permission to remove the file.
|
|
chmod(_full_path, _S_IREAD | _S_IWRITE);
|
|
#endif
|
|
|
|
// Use remove() to delete the existing file because, on Unix, this will
|
|
// allow processes that have it open continued access to the file.
|
|
remove(_full_path);
|
|
int fd = os::open(_full_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0666);
|
|
if (fd < 0) {
|
|
aot_log_error(aot)("Unable to create %s %s: (%s).", CDSConfig::type_of_archive_being_written(), _full_path,
|
|
os::strerror(errno));
|
|
AOTMetaspace::writing_error();
|
|
return;
|
|
}
|
|
_fd = fd;
|
|
_file_open = true;
|
|
|
|
// Seek past the header. We will write the header after all regions are written
|
|
// and their CRCs computed.
|
|
size_t header_bytes = header()->header_size();
|
|
|
|
header_bytes = align_up(header_bytes, AOTMetaspace::core_region_alignment());
|
|
_file_offset = header_bytes;
|
|
seek_to_position(_file_offset);
|
|
}
|
|
|
|
// Write the header to the file, seek to the next allocation boundary.
|
|
|
|
void FileMapInfo::write_header() {
|
|
_file_offset = 0;
|
|
seek_to_position(_file_offset);
|
|
assert(is_file_position_aligned(), "must be");
|
|
write_bytes(header(), header()->header_size());
|
|
}
|
|
|
|
size_t FileMapRegion::used_aligned() const {
|
|
return align_up(used(), AOTMetaspace::core_region_alignment());
|
|
}
|
|
|
|
void FileMapRegion::init(int region_index, size_t mapping_offset, size_t size, bool read_only,
|
|
bool allow_exec, int crc) {
|
|
_is_heap_region = HeapShared::is_heap_region(region_index);
|
|
_is_bitmap_region = (region_index == AOTMetaspace::bm);
|
|
_mapping_offset = mapping_offset;
|
|
_used = size;
|
|
_read_only = read_only;
|
|
_allow_exec = allow_exec;
|
|
_crc = crc;
|
|
_mapped_from_file = false;
|
|
_mapped_base = nullptr;
|
|
_in_reserved_space = false;
|
|
}
|
|
|
|
void FileMapRegion::init_oopmap(size_t offset, size_t size_in_bits) {
|
|
_oopmap_offset = offset;
|
|
_oopmap_size_in_bits = size_in_bits;
|
|
}
|
|
|
|
void FileMapRegion::init_ptrmap(size_t offset, size_t size_in_bits) {
|
|
_ptrmap_offset = offset;
|
|
_ptrmap_size_in_bits = size_in_bits;
|
|
}
|
|
|
|
bool FileMapRegion::check_region_crc(char* base) const {
|
|
// This function should be called after the region has been properly
|
|
// loaded into memory via FileMapInfo::map_region() or FileMapInfo::read_region().
|
|
// I.e., this->mapped_base() must be valid.
|
|
size_t sz = used();
|
|
if (sz == 0) {
|
|
return true;
|
|
}
|
|
|
|
assert(base != nullptr, "must be initialized");
|
|
int crc = ClassLoader::crc32(0, base, (jint)sz);
|
|
if (crc != this->crc()) {
|
|
aot_log_warning(aot)("Checksum verification failed.");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static const char* region_name(int region_index) {
|
|
static const char* names[] = {
|
|
"rw", "ro", "bm", "hp", "ac"
|
|
};
|
|
const int num_regions = sizeof(names)/sizeof(names[0]);
|
|
assert(0 <= region_index && region_index < num_regions, "sanity");
|
|
|
|
return names[region_index];
|
|
}
|
|
|
|
BitMapView FileMapInfo::bitmap_view(int region_index, bool is_oopmap) {
|
|
FileMapRegion* r = region_at(region_index);
|
|
char* bitmap_base = is_static() ? FileMapInfo::current_info()->map_bitmap_region() : FileMapInfo::dynamic_info()->map_bitmap_region();
|
|
bitmap_base += is_oopmap ? r->oopmap_offset() : r->ptrmap_offset();
|
|
size_t size_in_bits = is_oopmap ? r->oopmap_size_in_bits() : r->ptrmap_size_in_bits();
|
|
|
|
aot_log_debug(aot, reloc)("mapped %s relocation %smap @ " INTPTR_FORMAT " (%zu bits)",
|
|
region_name(region_index), is_oopmap ? "oop" : "ptr",
|
|
p2i(bitmap_base), size_in_bits);
|
|
|
|
return BitMapView((BitMap::bm_word_t*)(bitmap_base), size_in_bits);
|
|
}
|
|
|
|
BitMapView FileMapInfo::oopmap_view(int region_index) {
|
|
return bitmap_view(region_index, /*is_oopmap*/true);
|
|
}
|
|
|
|
BitMapView FileMapInfo::ptrmap_view(int region_index) {
|
|
return bitmap_view(region_index, /*is_oopmap*/false);
|
|
}
|
|
|
|
void FileMapRegion::print(outputStream* st, int region_index) {
|
|
st->print_cr("============ region ============= %d \"%s\"", region_index, region_name(region_index));
|
|
st->print_cr("- crc: 0x%08x", _crc);
|
|
st->print_cr("- read_only: %d", _read_only);
|
|
st->print_cr("- allow_exec: %d", _allow_exec);
|
|
st->print_cr("- is_heap_region: %d", _is_heap_region);
|
|
st->print_cr("- is_bitmap_region: %d", _is_bitmap_region);
|
|
st->print_cr("- mapped_from_file: %d", _mapped_from_file);
|
|
st->print_cr("- file_offset: 0x%zx", _file_offset);
|
|
st->print_cr("- mapping_offset: 0x%zx", _mapping_offset);
|
|
st->print_cr("- used: %zu", _used);
|
|
st->print_cr("- oopmap_offset: 0x%zx", _oopmap_offset);
|
|
st->print_cr("- oopmap_size_in_bits: %zu", _oopmap_size_in_bits);
|
|
st->print_cr("- ptrmap_offset: 0x%zx", _ptrmap_offset);
|
|
st->print_cr("- ptrmap_size_in_bits: %zu", _ptrmap_size_in_bits);
|
|
st->print_cr("- mapped_base: " INTPTR_FORMAT, p2i(_mapped_base));
|
|
}
|
|
|
|
void FileMapInfo::write_region(int region, char* base, size_t size,
|
|
bool read_only, bool allow_exec) {
|
|
assert(CDSConfig::is_dumping_archive(), "sanity");
|
|
|
|
FileMapRegion* r = region_at(region);
|
|
char* requested_base;
|
|
size_t mapping_offset = 0;
|
|
|
|
if (region == AOTMetaspace::bm) {
|
|
requested_base = nullptr; // always null for bm region
|
|
} else if (size == 0) {
|
|
// This is an unused region (e.g., a heap region when !INCLUDE_CDS_JAVA_HEAP)
|
|
requested_base = nullptr;
|
|
} else if (HeapShared::is_heap_region(region)) {
|
|
assert(CDSConfig::is_dumping_heap(), "sanity");
|
|
#if INCLUDE_CDS_JAVA_HEAP
|
|
assert(!CDSConfig::is_dumping_dynamic_archive(), "must be");
|
|
if (HeapShared::is_writing_mapping_mode()) {
|
|
requested_base = (char*)AOTMappedHeapWriter::requested_address();
|
|
if (UseCompressedOops) {
|
|
mapping_offset = (size_t)((address)requested_base - CompressedOops::base());
|
|
assert((mapping_offset >> CompressedOops::shift()) << CompressedOops::shift() == mapping_offset, "must be");
|
|
}
|
|
} else {
|
|
requested_base = nullptr;
|
|
}
|
|
#endif // INCLUDE_CDS_JAVA_HEAP
|
|
} else {
|
|
char* requested_SharedBaseAddress = (char*)AOTMetaspace::requested_base_address();
|
|
requested_base = ArchiveBuilder::current()->to_requested(base);
|
|
assert(requested_base >= requested_SharedBaseAddress, "must be");
|
|
mapping_offset = requested_base - requested_SharedBaseAddress;
|
|
}
|
|
|
|
r->set_file_offset(_file_offset);
|
|
int crc = ClassLoader::crc32(0, base, (jint)size);
|
|
if (size > 0) {
|
|
aot_log_info(aot)("Shared file region (%s) %d: %8zu"
|
|
" bytes, addr " INTPTR_FORMAT " file offset 0x%08" PRIxPTR
|
|
" crc 0x%08x",
|
|
region_name(region), region, size, p2i(requested_base), _file_offset, crc);
|
|
} else {
|
|
aot_log_info(aot)("Shared file region (%s) %d: %8zu"
|
|
" bytes", region_name(region), region, size);
|
|
}
|
|
|
|
r->init(region, mapping_offset, size, read_only, allow_exec, crc);
|
|
|
|
if (base != nullptr) {
|
|
write_bytes_aligned(base, size);
|
|
}
|
|
}
|
|
|
|
static size_t write_bitmap(const CHeapBitMap* map, char* output, size_t offset) {
|
|
size_t size_in_bytes = map->size_in_bytes();
|
|
map->write_to((BitMap::bm_word_t*)(output + offset), size_in_bytes);
|
|
return offset + size_in_bytes;
|
|
}
|
|
|
|
// The sorting code groups the objects with non-null oop/ptrs together.
|
|
// Relevant bitmaps then have lots of leading and trailing zeros, which
|
|
// we do not have to store.
|
|
size_t FileMapInfo::remove_bitmap_zeros(CHeapBitMap* map) {
|
|
BitMap::idx_t first_set = map->find_first_set_bit(0);
|
|
BitMap::idx_t last_set = map->find_last_set_bit(0);
|
|
size_t old_size = map->size();
|
|
|
|
// Slice and resize bitmap
|
|
map->truncate(first_set, last_set + 1);
|
|
|
|
assert(map->at(0), "First bit should be set");
|
|
assert(map->at(map->size() - 1), "Last bit should be set");
|
|
assert(map->size() <= old_size, "sanity");
|
|
|
|
return first_set;
|
|
}
|
|
|
|
char* FileMapInfo::write_bitmap_region(CHeapBitMap* rw_ptrmap,
|
|
CHeapBitMap* ro_ptrmap,
|
|
ArchiveMappedHeapInfo* mapped_heap_info,
|
|
ArchiveStreamedHeapInfo* streamed_heap_info,
|
|
size_t &size_in_bytes) {
|
|
size_t removed_rw_leading_zeros = remove_bitmap_zeros(rw_ptrmap);
|
|
size_t removed_ro_leading_zeros = remove_bitmap_zeros(ro_ptrmap);
|
|
header()->set_rw_ptrmap_start_pos(removed_rw_leading_zeros);
|
|
header()->set_ro_ptrmap_start_pos(removed_ro_leading_zeros);
|
|
size_in_bytes = rw_ptrmap->size_in_bytes() + ro_ptrmap->size_in_bytes();
|
|
|
|
if (mapped_heap_info != nullptr && mapped_heap_info->is_used()) {
|
|
// Remove leading and trailing zeros
|
|
assert(HeapShared::is_writing_mapping_mode(), "unexpected dumping mode");
|
|
size_t removed_oop_leading_zeros = remove_bitmap_zeros(mapped_heap_info->oopmap());
|
|
size_t removed_ptr_leading_zeros = remove_bitmap_zeros(mapped_heap_info->ptrmap());
|
|
mapped_heap_info->set_oopmap_start_pos(removed_oop_leading_zeros);
|
|
mapped_heap_info->set_ptrmap_start_pos(removed_ptr_leading_zeros);
|
|
|
|
size_in_bytes += mapped_heap_info->oopmap()->size_in_bytes();
|
|
size_in_bytes += mapped_heap_info->ptrmap()->size_in_bytes();
|
|
} else if (streamed_heap_info != nullptr && streamed_heap_info->is_used()) {
|
|
assert(HeapShared::is_writing_streaming_mode(), "unexpected dumping mode");
|
|
|
|
size_in_bytes += streamed_heap_info->oopmap()->size_in_bytes();
|
|
}
|
|
|
|
// The bitmap region contains up to 4 parts:
|
|
// rw_ptrmap: metaspace pointers inside the read-write region
|
|
// ro_ptrmap: metaspace pointers inside the read-only region
|
|
// *_heap_info->oopmap(): Java oop pointers in the heap region
|
|
// mapped_heap_info->ptrmap(): metaspace pointers in the heap region
|
|
char* buffer = NEW_C_HEAP_ARRAY(char, size_in_bytes, mtClassShared);
|
|
size_t written = 0;
|
|
|
|
region_at(AOTMetaspace::rw)->init_ptrmap(0, rw_ptrmap->size());
|
|
written = write_bitmap(rw_ptrmap, buffer, written);
|
|
|
|
region_at(AOTMetaspace::ro)->init_ptrmap(written, ro_ptrmap->size());
|
|
written = write_bitmap(ro_ptrmap, buffer, written);
|
|
|
|
if (mapped_heap_info != nullptr && mapped_heap_info->is_used()) {
|
|
assert(HeapShared::is_writing_mapping_mode(), "unexpected dumping mode");
|
|
FileMapRegion* r = region_at(AOTMetaspace::hp);
|
|
|
|
r->init_oopmap(written, mapped_heap_info->oopmap()->size());
|
|
written = write_bitmap(mapped_heap_info->oopmap(), buffer, written);
|
|
|
|
r->init_ptrmap(written, mapped_heap_info->ptrmap()->size());
|
|
written = write_bitmap(mapped_heap_info->ptrmap(), buffer, written);
|
|
} else if (streamed_heap_info != nullptr && streamed_heap_info->is_used()) {
|
|
assert(HeapShared::is_writing_streaming_mode(), "unexpected dumping mode");
|
|
FileMapRegion* r = region_at(AOTMetaspace::hp);
|
|
|
|
r->init_oopmap(written, streamed_heap_info->oopmap()->size());
|
|
written = write_bitmap(streamed_heap_info->oopmap(), buffer, written);
|
|
}
|
|
|
|
write_region(AOTMetaspace::bm, (char*)buffer, size_in_bytes, /*read_only=*/true, /*allow_exec=*/false);
|
|
return buffer;
|
|
}
|
|
|
|
#if INCLUDE_CDS_JAVA_HEAP
|
|
size_t FileMapInfo::write_mapped_heap_region(ArchiveMappedHeapInfo* heap_info) {
|
|
char* buffer_start = heap_info->buffer_start();
|
|
size_t buffer_size = heap_info->buffer_byte_size();
|
|
write_region(AOTMetaspace::hp, buffer_start, buffer_size, false, false);
|
|
header()->set_mapped_heap_header(heap_info->create_header());
|
|
return buffer_size;
|
|
}
|
|
|
|
size_t FileMapInfo::write_streamed_heap_region(ArchiveStreamedHeapInfo* heap_info) {
|
|
char* buffer_start = heap_info->buffer_start();
|
|
size_t buffer_size = heap_info->buffer_byte_size();
|
|
write_region(AOTMetaspace::hp, buffer_start, buffer_size, true, false);
|
|
header()->set_streamed_heap_header(heap_info->create_header());
|
|
return buffer_size;
|
|
}
|
|
#endif // INCLUDE_CDS_JAVA_HEAP
|
|
|
|
// Dump bytes to file -- at the current file position.
|
|
|
|
void FileMapInfo::write_bytes(const void* buffer, size_t nbytes) {
|
|
assert(_file_open, "must be");
|
|
if (!os::write(_fd, buffer, nbytes)) {
|
|
// If the shared archive is corrupted, close it and remove it.
|
|
close();
|
|
remove(_full_path);
|
|
|
|
if (CDSConfig::is_dumping_preimage_static_archive()) {
|
|
AOTMetaspace::writing_error("Unable to write to AOT configuration file.");
|
|
} else if (CDSConfig::new_aot_flags_used()) {
|
|
AOTMetaspace::writing_error("Unable to write to AOT cache.");
|
|
} else {
|
|
AOTMetaspace::writing_error("Unable to write to shared archive.");
|
|
}
|
|
}
|
|
_file_offset += nbytes;
|
|
}
|
|
|
|
bool FileMapInfo::is_file_position_aligned() const {
|
|
return _file_offset == align_up(_file_offset,
|
|
AOTMetaspace::core_region_alignment());
|
|
}
|
|
|
|
// Align file position to an allocation unit boundary.
|
|
|
|
void FileMapInfo::align_file_position() {
|
|
assert(_file_open, "must be");
|
|
size_t new_file_offset = align_up(_file_offset,
|
|
AOTMetaspace::core_region_alignment());
|
|
if (new_file_offset != _file_offset) {
|
|
_file_offset = new_file_offset;
|
|
// Seek one byte back from the target and write a byte to insure
|
|
// that the written file is the correct length.
|
|
_file_offset -= 1;
|
|
seek_to_position(_file_offset);
|
|
char zero = 0;
|
|
write_bytes(&zero, 1);
|
|
}
|
|
}
|
|
|
|
|
|
// Dump bytes to file -- at the current file position.
|
|
|
|
void FileMapInfo::write_bytes_aligned(const void* buffer, size_t nbytes) {
|
|
align_file_position();
|
|
write_bytes(buffer, nbytes);
|
|
align_file_position();
|
|
}
|
|
|
|
// Close the shared archive file. This does NOT unmap mapped regions.
|
|
|
|
void FileMapInfo::close() {
|
|
if (_file_open) {
|
|
if (::close(_fd) < 0) {
|
|
AOTMetaspace::unrecoverable_loading_error("Unable to close the shared archive file.");
|
|
}
|
|
_file_open = false;
|
|
_fd = -1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Same as os::map_memory() but also pretouches if AlwaysPreTouch is enabled.
|
|
*/
|
|
static char* map_memory(int fd, const char* file_name, size_t file_offset,
|
|
char* addr, size_t bytes, bool read_only,
|
|
bool allow_exec, MemTag mem_tag) {
|
|
char* mem = os::map_memory(fd, file_name, file_offset, addr, bytes,
|
|
mem_tag, AlwaysPreTouch ? false : read_only,
|
|
allow_exec);
|
|
if (mem != nullptr && AlwaysPreTouch) {
|
|
os::pretouch_memory(mem, mem + bytes);
|
|
}
|
|
return mem;
|
|
}
|
|
|
|
char* FileMapInfo::map_heap_region(FileMapRegion* r, char* addr, size_t bytes) {
|
|
return ::map_memory(_fd,
|
|
_full_path,
|
|
r->file_offset(),
|
|
addr,
|
|
bytes,
|
|
r->read_only(),
|
|
r->allow_exec(),
|
|
mtJavaHeap);
|
|
}
|
|
|
|
// JVM/TI RedefineClasses() support:
|
|
// Remap the shared readonly space to shared readwrite, private.
|
|
bool FileMapInfo::remap_shared_readonly_as_readwrite() {
|
|
int idx = AOTMetaspace::ro;
|
|
FileMapRegion* r = region_at(idx);
|
|
if (!r->read_only()) {
|
|
// the space is already readwrite so we are done
|
|
return true;
|
|
}
|
|
size_t size = r->used_aligned();
|
|
if (!open_for_read()) {
|
|
return false;
|
|
}
|
|
char *addr = r->mapped_base();
|
|
// This path should not be reached for Windows; see JDK-8222379.
|
|
assert(WINDOWS_ONLY(false) NOT_WINDOWS(true), "Don't call on Windows");
|
|
// Replace old mapping with new one that is writable.
|
|
char *base = os::map_memory(_fd, _full_path, r->file_offset(),
|
|
addr, size, mtNone, false /* !read_only */,
|
|
r->allow_exec());
|
|
close();
|
|
// These have to be errors because the shared region is now unmapped.
|
|
if (base == nullptr) {
|
|
aot_log_error(aot)("Unable to remap shared readonly space (errno=%d).", errno);
|
|
vm_exit(1);
|
|
}
|
|
if (base != addr) {
|
|
aot_log_error(aot)("Unable to remap shared readonly space (errno=%d).", errno);
|
|
vm_exit(1);
|
|
}
|
|
r->set_read_only(false);
|
|
return true;
|
|
}
|
|
|
|
// Memory map a region in the address space.
|
|
static const char* shared_region_name[] = { "ReadWrite", "ReadOnly", "Bitmap", "Heap", "Code" };
|
|
|
|
MapArchiveResult FileMapInfo::map_regions(int regions[], int num_regions, char* mapped_base_address, ReservedSpace rs) {
|
|
DEBUG_ONLY(FileMapRegion* last_region = nullptr);
|
|
intx addr_delta = mapped_base_address - header()->requested_base_address();
|
|
|
|
// Make sure we don't attempt to use header()->mapped_base_address() unless
|
|
// it's been successfully mapped.
|
|
DEBUG_ONLY(header()->set_mapped_base_address((char*)(uintptr_t)0xdeadbeef);)
|
|
|
|
for (int i = 0; i < num_regions; i++) {
|
|
int idx = regions[i];
|
|
MapArchiveResult result = map_region(idx, addr_delta, mapped_base_address, rs);
|
|
if (result != MAP_ARCHIVE_SUCCESS) {
|
|
return result;
|
|
}
|
|
FileMapRegion* r = region_at(idx);
|
|
DEBUG_ONLY(if (last_region != nullptr) {
|
|
// Ensure that the OS won't be able to allocate new memory spaces between any mapped
|
|
// regions, or else it would mess up the simple comparison in MetaspaceObj::in_aot_cache().
|
|
assert(r->mapped_base() == last_region->mapped_end(), "must have no gaps");
|
|
}
|
|
last_region = r;)
|
|
aot_log_info(aot)("Mapped %s region #%d at base " INTPTR_FORMAT " top " INTPTR_FORMAT " (%s)", is_static() ? "static " : "dynamic",
|
|
idx, p2i(r->mapped_base()), p2i(r->mapped_end()),
|
|
shared_region_name[idx]);
|
|
|
|
}
|
|
|
|
header()->set_mapped_base_address(header()->requested_base_address() + addr_delta);
|
|
if (addr_delta != 0 && !relocate_pointers_in_core_regions(addr_delta)) {
|
|
return MAP_ARCHIVE_OTHER_FAILURE;
|
|
}
|
|
|
|
return MAP_ARCHIVE_SUCCESS;
|
|
}
|
|
|
|
bool FileMapInfo::read_region(int i, char* base, size_t size, bool do_commit) {
|
|
FileMapRegion* r = region_at(i);
|
|
if (do_commit) {
|
|
aot_log_info(aot)("Commit %s region #%d at base " INTPTR_FORMAT " top " INTPTR_FORMAT " (%s)%s",
|
|
is_static() ? "static " : "dynamic", i, p2i(base), p2i(base + size),
|
|
shared_region_name[i], r->allow_exec() ? " exec" : "");
|
|
if (!os::commit_memory(base, size, r->allow_exec())) {
|
|
aot_log_error(aot)("Failed to commit %s region #%d (%s)", is_static() ? "static " : "dynamic",
|
|
i, shared_region_name[i]);
|
|
return false;
|
|
}
|
|
}
|
|
if (os::lseek(_fd, (long)r->file_offset(), SEEK_SET) != (int)r->file_offset() ||
|
|
read_bytes(base, size) != size) {
|
|
return false;
|
|
}
|
|
|
|
if (VerifySharedSpaces && !r->check_region_crc(base)) {
|
|
return false;
|
|
}
|
|
|
|
r->set_mapped_from_file(false);
|
|
r->set_mapped_base(base);
|
|
|
|
return true;
|
|
}
|
|
|
|
MapArchiveResult FileMapInfo::map_region(int i, intx addr_delta, char* mapped_base_address, ReservedSpace rs) {
|
|
assert(!HeapShared::is_heap_region(i), "sanity");
|
|
FileMapRegion* r = region_at(i);
|
|
size_t size = r->used_aligned();
|
|
char *requested_addr = mapped_base_address + r->mapping_offset();
|
|
assert(!is_mapped(), "must be not mapped yet");
|
|
assert(requested_addr != nullptr, "must be specified");
|
|
|
|
r->set_mapped_from_file(false);
|
|
r->set_in_reserved_space(false);
|
|
|
|
if (AOTMetaspace::use_windows_memory_mapping()) {
|
|
// Windows cannot remap read-only shared memory to read-write when required for
|
|
// RedefineClasses, which is also used by JFR. Always map windows regions as RW.
|
|
r->set_read_only(false);
|
|
} else if (JvmtiExport::can_modify_any_class() || JvmtiExport::can_walk_any_space() ||
|
|
Arguments::has_jfr_option()) {
|
|
// If a tool agent is in use (debugging enabled), or JFR, we must map the address space RW
|
|
r->set_read_only(false);
|
|
} else if (addr_delta != 0) {
|
|
r->set_read_only(false); // Need to patch the pointers
|
|
}
|
|
|
|
if (AOTMetaspace::use_windows_memory_mapping() && rs.is_reserved()) {
|
|
// This is the second time we try to map the archive(s). We have already created a ReservedSpace
|
|
// that covers all the FileMapRegions to ensure all regions can be mapped. However, Windows
|
|
// can't mmap into a ReservedSpace, so we just ::read() the data. We're going to patch all the
|
|
// regions anyway, so there's no benefit for mmap anyway.
|
|
if (!read_region(i, requested_addr, size, /* do_commit = */ true)) {
|
|
AOTMetaspace::report_loading_error("Failed to read %s shared space into reserved space at " INTPTR_FORMAT,
|
|
shared_region_name[i], p2i(requested_addr));
|
|
return MAP_ARCHIVE_OTHER_FAILURE; // oom or I/O error.
|
|
} else {
|
|
assert(r->mapped_base() != nullptr, "must be initialized");
|
|
}
|
|
} else {
|
|
// Note that this may either be a "fresh" mapping into unreserved address
|
|
// space (Windows, first mapping attempt), or a mapping into pre-reserved
|
|
// space (Posix). See also comment in AOTMetaspace::map_archives().
|
|
char* base = map_memory(_fd, _full_path, r->file_offset(),
|
|
requested_addr, size, r->read_only(),
|
|
r->allow_exec(), mtClassShared);
|
|
if (base != requested_addr) {
|
|
AOTMetaspace::report_loading_error("Unable to map %s shared space at " INTPTR_FORMAT,
|
|
shared_region_name[i], p2i(requested_addr));
|
|
_memory_mapping_failed = true;
|
|
return MAP_ARCHIVE_MMAP_FAILURE;
|
|
}
|
|
|
|
if (VerifySharedSpaces && !r->check_region_crc(requested_addr)) {
|
|
return MAP_ARCHIVE_OTHER_FAILURE;
|
|
}
|
|
|
|
r->set_mapped_from_file(true);
|
|
r->set_mapped_base(requested_addr);
|
|
}
|
|
|
|
if (rs.is_reserved()) {
|
|
char* mapped_base = r->mapped_base();
|
|
assert(rs.base() <= mapped_base && mapped_base + size <= rs.end(),
|
|
PTR_FORMAT " <= " PTR_FORMAT " < " PTR_FORMAT " <= " PTR_FORMAT,
|
|
p2i(rs.base()), p2i(mapped_base), p2i(mapped_base + size), p2i(rs.end()));
|
|
r->set_in_reserved_space(rs.is_reserved());
|
|
}
|
|
return MAP_ARCHIVE_SUCCESS;
|
|
}
|
|
|
|
// The return value is the location of the archive relocation bitmap.
|
|
char* FileMapInfo::map_auxiliary_region(int region_index, bool read_only) {
|
|
FileMapRegion* r = region_at(region_index);
|
|
if (r->mapped_base() != nullptr) {
|
|
return r->mapped_base();
|
|
}
|
|
const char* region_name = shared_region_name[region_index];
|
|
bool allow_exec = false;
|
|
char* requested_addr = nullptr; // allow OS to pick any location
|
|
char* mapped_base = map_memory(_fd, _full_path, r->file_offset(),
|
|
requested_addr, r->used_aligned(), read_only, allow_exec, mtClassShared);
|
|
if (mapped_base == nullptr) {
|
|
AOTMetaspace::report_loading_error("failed to map %d region", region_index);
|
|
return nullptr;
|
|
}
|
|
|
|
if (VerifySharedSpaces && !r->check_region_crc(mapped_base)) {
|
|
aot_log_error(aot)("region %d CRC error", region_index);
|
|
if (!os::unmap_memory(mapped_base, r->used_aligned())) {
|
|
fatal("os::unmap_memory of region %d failed", region_index);
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
r->set_mapped_from_file(true);
|
|
r->set_mapped_base(mapped_base);
|
|
aot_log_info(aot)("Mapped %s region #%d at base %zu top %zu (%s)",
|
|
is_static() ? "static " : "dynamic",
|
|
region_index, p2i(r->mapped_base()), p2i(r->mapped_end()),
|
|
region_name);
|
|
return mapped_base;
|
|
}
|
|
|
|
char* FileMapInfo::map_bitmap_region() {
|
|
return map_auxiliary_region(AOTMetaspace::bm, false);
|
|
}
|
|
|
|
bool FileMapInfo::map_aot_code_region(ReservedSpace rs) {
|
|
FileMapRegion* r = region_at(AOTMetaspace::ac);
|
|
assert(r->used() > 0 && r->used_aligned() == rs.size(), "must be");
|
|
|
|
char* requested_base = rs.base();
|
|
assert(requested_base != nullptr, "should be inside code cache");
|
|
|
|
char* mapped_base;
|
|
if (AOTMetaspace::use_windows_memory_mapping()) {
|
|
if (!read_region(AOTMetaspace::ac, requested_base, r->used_aligned(), /* do_commit = */ true)) {
|
|
AOTMetaspace::report_loading_error("Failed to read aot code shared space into reserved space at " INTPTR_FORMAT,
|
|
p2i(requested_base));
|
|
return false;
|
|
}
|
|
mapped_base = requested_base;
|
|
} else {
|
|
// We do not execute in-place in the AOT code region.
|
|
// AOT code is copied to the CodeCache for execution.
|
|
bool read_only = false, allow_exec = false;
|
|
mapped_base = map_memory(_fd, _full_path, r->file_offset(),
|
|
requested_base, r->used_aligned(), read_only, allow_exec, mtClassShared);
|
|
}
|
|
if (mapped_base == nullptr) {
|
|
AOTMetaspace::report_loading_error("failed to map aot code region");
|
|
return false;
|
|
} else {
|
|
assert(mapped_base == requested_base, "must be");
|
|
r->set_mapped_from_file(true);
|
|
r->set_mapped_base(mapped_base);
|
|
aot_log_info(aot)("Mapped static region #%d at base " INTPTR_FORMAT " top " INTPTR_FORMAT " (%s)",
|
|
AOTMetaspace::ac, p2i(r->mapped_base()), p2i(r->mapped_end()),
|
|
shared_region_name[AOTMetaspace::ac]);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
class SharedDataRelocationTask : public ArchiveWorkerTask {
|
|
private:
|
|
BitMapView* const _rw_bm;
|
|
BitMapView* const _ro_bm;
|
|
SharedDataRelocator* const _rw_reloc;
|
|
SharedDataRelocator* const _ro_reloc;
|
|
|
|
public:
|
|
SharedDataRelocationTask(BitMapView* rw_bm, BitMapView* ro_bm, SharedDataRelocator* rw_reloc, SharedDataRelocator* ro_reloc) :
|
|
ArchiveWorkerTask("Shared Data Relocation"),
|
|
_rw_bm(rw_bm), _ro_bm(ro_bm), _rw_reloc(rw_reloc), _ro_reloc(ro_reloc) {}
|
|
|
|
void work(int chunk, int max_chunks) override {
|
|
work_on(chunk, max_chunks, _rw_bm, _rw_reloc);
|
|
work_on(chunk, max_chunks, _ro_bm, _ro_reloc);
|
|
}
|
|
|
|
void work_on(int chunk, int max_chunks, BitMapView* bm, SharedDataRelocator* reloc) {
|
|
BitMap::idx_t size = bm->size();
|
|
BitMap::idx_t start = MIN2(size, size * chunk / max_chunks);
|
|
BitMap::idx_t end = MIN2(size, size * (chunk + 1) / max_chunks);
|
|
assert(end > start, "Sanity: no empty slices");
|
|
bm->iterate(reloc, start, end);
|
|
}
|
|
};
|
|
|
|
// This is called when we cannot map the archive at the requested[ base address (usually 0x800000000).
|
|
// We relocate all pointers in the 2 core regions (ro, rw).
|
|
bool FileMapInfo::relocate_pointers_in_core_regions(intx addr_delta) {
|
|
aot_log_debug(aot, reloc)("runtime archive relocation start");
|
|
char* bitmap_base = map_bitmap_region();
|
|
|
|
if (bitmap_base == nullptr) {
|
|
return false; // OOM, or CRC check failure
|
|
} else {
|
|
BitMapView rw_ptrmap = ptrmap_view(AOTMetaspace::rw);
|
|
BitMapView ro_ptrmap = ptrmap_view(AOTMetaspace::ro);
|
|
|
|
FileMapRegion* rw_region = first_core_region();
|
|
FileMapRegion* ro_region = last_core_region();
|
|
|
|
// Patch all pointers inside the RW region
|
|
address rw_patch_base = (address)rw_region->mapped_base();
|
|
address rw_patch_end = (address)rw_region->mapped_end();
|
|
|
|
// Patch all pointers inside the RO region
|
|
address ro_patch_base = (address)ro_region->mapped_base();
|
|
address ro_patch_end = (address)ro_region->mapped_end();
|
|
|
|
// the current value of the pointers to be patched must be within this
|
|
// range (i.e., must be between the requested base address and the address of the current archive).
|
|
// Note: top archive may point to objects in the base archive, but not the other way around.
|
|
address valid_old_base = (address)header()->requested_base_address();
|
|
address valid_old_end = valid_old_base + mapping_end_offset();
|
|
|
|
// after patching, the pointers must point inside this range
|
|
// (the requested location of the archive, as mapped at runtime).
|
|
address valid_new_base = (address)header()->mapped_base_address();
|
|
address valid_new_end = (address)mapped_end();
|
|
|
|
SharedDataRelocator rw_patcher((address*)rw_patch_base + header()->rw_ptrmap_start_pos(), (address*)rw_patch_end, valid_old_base, valid_old_end,
|
|
valid_new_base, valid_new_end, addr_delta);
|
|
SharedDataRelocator ro_patcher((address*)ro_patch_base + header()->ro_ptrmap_start_pos(), (address*)ro_patch_end, valid_old_base, valid_old_end,
|
|
valid_new_base, valid_new_end, addr_delta);
|
|
|
|
if (AOTCacheParallelRelocation) {
|
|
ArchiveWorkers workers;
|
|
SharedDataRelocationTask task(&rw_ptrmap, &ro_ptrmap, &rw_patcher, &ro_patcher);
|
|
workers.run_task(&task);
|
|
} else {
|
|
rw_ptrmap.iterate(&rw_patcher);
|
|
ro_ptrmap.iterate(&ro_patcher);
|
|
}
|
|
|
|
// The AOTMetaspace::bm region will be unmapped in AOTMetaspace::initialize_shared_spaces().
|
|
|
|
aot_log_debug(aot, reloc)("runtime archive relocation done");
|
|
return true;
|
|
}
|
|
}
|
|
|
|
size_t FileMapInfo::read_bytes(void* buffer, size_t count) {
|
|
assert(_file_open, "Archive file is not open");
|
|
size_t n = ::read(_fd, buffer, (unsigned int)count);
|
|
if (n != count) {
|
|
// Close the file if there's a problem reading it.
|
|
close();
|
|
return 0;
|
|
}
|
|
_file_offset += count;
|
|
return count;
|
|
}
|
|
|
|
// Get the total size in bytes of a read only region
|
|
size_t FileMapInfo::readonly_total() {
|
|
size_t total = 0;
|
|
if (current_info() != nullptr) {
|
|
FileMapRegion* r = FileMapInfo::current_info()->region_at(AOTMetaspace::ro);
|
|
if (r->read_only()) total += r->used();
|
|
}
|
|
if (dynamic_info() != nullptr) {
|
|
FileMapRegion* r = FileMapInfo::dynamic_info()->region_at(AOTMetaspace::ro);
|
|
if (r->read_only()) total += r->used();
|
|
}
|
|
return total;
|
|
}
|
|
|
|
#if INCLUDE_CDS_JAVA_HEAP
|
|
|
|
bool FileMapInfo::has_heap_region() {
|
|
return (region_at(AOTMetaspace::hp)->used() > 0);
|
|
}
|
|
|
|
static void on_heap_region_loading_error() {
|
|
if (CDSConfig::is_using_aot_linked_classes()) {
|
|
// It's too late to recover -- we have already committed to use the archived metaspace objects, but
|
|
// the archived heap objects cannot be loaded, so we don't have the archived FMG to guarantee that
|
|
// all AOT-linked classes are visible.
|
|
//
|
|
// We get here because the heap is too small. The app will fail anyway. So let's quit.
|
|
aot_log_error(aot)("%s has aot-linked classes but the archived "
|
|
"heap objects cannot be loaded. Try increasing your heap size.",
|
|
CDSConfig::type_of_archive_being_loaded());
|
|
AOTMetaspace::unrecoverable_loading_error();
|
|
}
|
|
CDSConfig::stop_using_full_module_graph();
|
|
}
|
|
|
|
void FileMapInfo::stream_heap_region() {
|
|
assert(object_streaming_mode(), "This should only be done for the streaming approach");
|
|
|
|
if (map_auxiliary_region(AOTMetaspace::hp, /*readonly=*/true) != nullptr) {
|
|
HeapShared::initialize_streaming();
|
|
} else {
|
|
on_heap_region_loading_error();
|
|
}
|
|
}
|
|
|
|
void FileMapInfo::map_or_load_heap_region() {
|
|
assert(!object_streaming_mode(), "This should only be done for the mapping approach");
|
|
bool success = false;
|
|
|
|
if (AOTMappedHeapLoader::can_map()) {
|
|
success = AOTMappedHeapLoader::map_heap_region(this);
|
|
} else if (AOTMappedHeapLoader::can_load()) {
|
|
success = AOTMappedHeapLoader::load_heap_region(this);
|
|
}
|
|
|
|
if (!success) {
|
|
on_heap_region_loading_error();
|
|
}
|
|
}
|
|
|
|
bool FileMapInfo::can_use_heap_region() {
|
|
if (!has_heap_region()) {
|
|
return false;
|
|
}
|
|
if (!object_streaming_mode() && !Universe::heap()->can_load_archived_objects() && !UseG1GC) {
|
|
// Incompatible object format
|
|
return false;
|
|
}
|
|
if (JvmtiExport::should_post_class_file_load_hook() && JvmtiExport::has_early_class_hook_env()) {
|
|
ShouldNotReachHere(); // CDS should have been disabled.
|
|
// The archived objects are mapped at JVM start-up, but we don't know if
|
|
// j.l.String or j.l.Class might be replaced by the ClassFileLoadHook,
|
|
// which would make the archived String or mirror objects invalid. Let's be safe and not
|
|
// use the archived objects. These 2 classes are loaded during the JVMTI "early" stage.
|
|
//
|
|
// If JvmtiExport::has_early_class_hook_env() is false, the classes of some objects
|
|
// in the archived subgraphs may be replaced by the ClassFileLoadHook. But that's OK
|
|
// because we won't install an archived object subgraph if the klass of any of the
|
|
// referenced objects are replaced. See HeapShared::initialize_from_archived_subgraph().
|
|
}
|
|
|
|
// We pre-compute narrow Klass IDs with the runtime mapping start intended to be the base, and a shift of
|
|
// HeapShared::precomputed_narrow_klass_shift. We enforce this encoding at runtime (see
|
|
// CompressedKlassPointers::initialize_for_given_encoding()). Therefore, the following assertions must
|
|
// hold:
|
|
address archive_narrow_klass_base = (address)header()->mapped_base_address();
|
|
const int archive_narrow_klass_pointer_bits = header()->narrow_klass_pointer_bits();
|
|
const int archive_narrow_klass_shift = header()->narrow_klass_shift();
|
|
|
|
aot_log_info(aot)("CDS archive was created with max heap size = %zuM, and the following configuration:",
|
|
max_heap_size()/M);
|
|
|
|
aot_log_info(aot)(" narrow_klass_base at mapping start address, narrow_klass_pointer_bits = %d, narrow_klass_shift = %d",
|
|
archive_narrow_klass_pointer_bits, archive_narrow_klass_shift);
|
|
if (UseCompressedOops) {
|
|
aot_log_info(aot)(" narrow_oop_mode = %d, narrow_oop_base = " PTR_FORMAT ", narrow_oop_shift = %d",
|
|
narrow_oop_mode(), p2i(narrow_oop_base()), narrow_oop_shift());
|
|
}
|
|
aot_log_info(aot)("The current max heap size = %zuM, G1HeapRegion::GrainBytes = %zu",
|
|
MaxHeapSize/M, G1HeapRegion::GrainBytes);
|
|
aot_log_info(aot)(" narrow_klass_base = " PTR_FORMAT ", arrow_klass_pointer_bits = %d, narrow_klass_shift = %d",
|
|
p2i(CompressedKlassPointers::base()), CompressedKlassPointers::narrow_klass_pointer_bits(), CompressedKlassPointers::shift());
|
|
if (UseCompressedOops) {
|
|
aot_log_info(aot)(" narrow_oop_mode = %d, narrow_oop_base = " PTR_FORMAT ", narrow_oop_shift = %d",
|
|
CompressedOops::mode(), p2i(CompressedOops::base()), CompressedOops::shift());
|
|
}
|
|
if (!object_streaming_mode()) {
|
|
aot_log_info(aot)(" heap range = [" PTR_FORMAT " - " PTR_FORMAT "]",
|
|
UseCompressedOops ? p2i(CompressedOops::begin()) :
|
|
UseG1GC ? p2i((address)G1CollectedHeap::heap()->reserved().start()) : 0L,
|
|
UseCompressedOops ? p2i(CompressedOops::end()) :
|
|
UseG1GC ? p2i((address)G1CollectedHeap::heap()->reserved().end()) : 0L);
|
|
}
|
|
|
|
int err = 0;
|
|
if ( archive_narrow_klass_base != CompressedKlassPointers::base() ||
|
|
(err = 1, archive_narrow_klass_pointer_bits != CompressedKlassPointers::narrow_klass_pointer_bits()) ||
|
|
(err = 2, archive_narrow_klass_shift != CompressedKlassPointers::shift()) ) {
|
|
stringStream ss;
|
|
switch (err) {
|
|
case 0:
|
|
ss.print("Unexpected encoding base encountered (" PTR_FORMAT ", expected " PTR_FORMAT ")",
|
|
p2i(CompressedKlassPointers::base()), p2i(archive_narrow_klass_base));
|
|
break;
|
|
case 1:
|
|
ss.print("Unexpected narrow Klass bit length encountered (%d, expected %d)",
|
|
CompressedKlassPointers::narrow_klass_pointer_bits(), archive_narrow_klass_pointer_bits);
|
|
break;
|
|
case 2:
|
|
ss.print("Unexpected narrow Klass shift encountered (%d, expected %d)",
|
|
CompressedKlassPointers::shift(), archive_narrow_klass_shift);
|
|
break;
|
|
default:
|
|
ShouldNotReachHere();
|
|
};
|
|
if (CDSConfig::new_aot_flags_used()) {
|
|
LogTarget(Info, aot) lt;
|
|
if (lt.is_enabled()) {
|
|
LogStream ls(lt);
|
|
ls.print_raw(ss.base());
|
|
header()->print(&ls);
|
|
}
|
|
} else {
|
|
LogTarget(Info, cds) lt;
|
|
if (lt.is_enabled()) {
|
|
LogStream ls(lt);
|
|
ls.print_raw(ss.base());
|
|
header()->print(&ls);
|
|
}
|
|
}
|
|
assert(false, "%s", ss.base());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#endif // INCLUDE_CDS_JAVA_HEAP
|
|
|
|
// Unmap a memory region in the address space.
|
|
|
|
void FileMapInfo::unmap_regions(int regions[], int num_regions) {
|
|
for (int r = 0; r < num_regions; r++) {
|
|
int idx = regions[r];
|
|
unmap_region(idx);
|
|
}
|
|
}
|
|
|
|
void FileMapInfo::unmap_region(int i) {
|
|
FileMapRegion* r = region_at(i);
|
|
char* mapped_base = r->mapped_base();
|
|
size_t size = r->used_aligned();
|
|
|
|
if (mapped_base != nullptr) {
|
|
if (size > 0 && r->mapped_from_file()) {
|
|
aot_log_info(aot)("Unmapping region #%d at base " INTPTR_FORMAT " (%s)", i, p2i(mapped_base),
|
|
shared_region_name[i]);
|
|
if (r->in_reserved_space()) {
|
|
// This region was mapped inside a ReservedSpace. Its memory will be freed when the ReservedSpace
|
|
// is released. Zero it so that we don't accidentally read its content.
|
|
aot_log_info(aot)("Region #%d (%s) is in a reserved space, it will be freed when the space is released", i, shared_region_name[i]);
|
|
} else {
|
|
if (!os::unmap_memory(mapped_base, size)) {
|
|
fatal("os::unmap_memory failed");
|
|
}
|
|
}
|
|
}
|
|
r->set_mapped_base(nullptr);
|
|
}
|
|
}
|
|
|
|
void FileMapInfo::assert_mark(bool check) {
|
|
if (!check) {
|
|
AOTMetaspace::unrecoverable_loading_error("Mark mismatch while restoring from shared file.");
|
|
}
|
|
}
|
|
|
|
FileMapInfo* FileMapInfo::_current_info = nullptr;
|
|
FileMapInfo* FileMapInfo::_dynamic_archive_info = nullptr;
|
|
bool FileMapInfo::_memory_mapping_failed = false;
|
|
|
|
// Open the shared archive file, read and validate the header
|
|
// information (version, boot classpath, etc.). If initialization
|
|
// fails, shared spaces are disabled and the file is closed.
|
|
//
|
|
// Validation of the archive is done in two steps:
|
|
//
|
|
// [1] validate_header() - done here.
|
|
// [2] validate_shared_path_table - this is done later, because the table is in the RO
|
|
// region of the archive, which is not mapped yet.
|
|
bool FileMapInfo::open_as_input() {
|
|
assert(CDSConfig::is_using_archive(), "UseSharedSpaces expected.");
|
|
assert(Arguments::has_jimage(), "The shared archive file cannot be used with an exploded module build.");
|
|
|
|
if (JvmtiExport::should_post_class_file_load_hook() && JvmtiExport::has_early_class_hook_env()) {
|
|
// CDS assumes that no classes resolved in vmClasses::resolve_all()
|
|
// are replaced at runtime by JVMTI ClassFileLoadHook. All of those classes are resolved
|
|
// during the JVMTI "early" stage, so we can still use CDS if
|
|
// JvmtiExport::has_early_class_hook_env() is false.
|
|
AOTMetaspace::report_loading_error("CDS is disabled because early JVMTI ClassFileLoadHook is in use.");
|
|
return false;
|
|
}
|
|
|
|
if (!open_for_read() || !init_from_file(_fd) || !validate_header()) {
|
|
if (_is_static) {
|
|
AOTMetaspace::report_loading_error("Loading static archive failed.");
|
|
return false;
|
|
} else {
|
|
AOTMetaspace::report_loading_error("Loading dynamic archive failed.");
|
|
if (AutoCreateSharedArchive) {
|
|
CDSConfig::enable_dumping_dynamic_archive(_full_path);
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool FileMapInfo::validate_aot_class_linking() {
|
|
// These checks need to be done after FileMapInfo::initialize(), which gets called before Universe::heap()
|
|
// is available.
|
|
if (header()->has_aot_linked_classes()) {
|
|
const char* archive_type = CDSConfig::type_of_archive_being_loaded();
|
|
CDSConfig::set_has_aot_linked_classes(true);
|
|
if (JvmtiExport::should_post_class_file_load_hook()) {
|
|
aot_log_error(aot)("%s has aot-linked classes. It cannot be used when JVMTI ClassFileLoadHook is in use.",
|
|
archive_type);
|
|
return false;
|
|
}
|
|
if (JvmtiExport::has_early_vmstart_env()) {
|
|
aot_log_error(aot)("%s has aot-linked classes. It cannot be used when JVMTI early vm start is in use.",
|
|
archive_type);
|
|
return false;
|
|
}
|
|
if (!CDSConfig::is_using_full_module_graph()) {
|
|
aot_log_error(aot)("%s has aot-linked classes. It cannot be used when archived full module graph is not used.",
|
|
archive_type);
|
|
return false;
|
|
}
|
|
|
|
const char* prop = Arguments::get_property("java.security.manager");
|
|
if (prop != nullptr && strcmp(prop, "disallow") != 0) {
|
|
aot_log_error(aot)("%s has aot-linked classes. It cannot be used with -Djava.security.manager=%s.",
|
|
archive_type, prop);
|
|
return false;
|
|
}
|
|
|
|
#if INCLUDE_JVMTI
|
|
if (Arguments::has_jdwp_agent()) {
|
|
aot_log_error(aot)("%s has aot-linked classes. It cannot be used with JDWP agent", archive_type);
|
|
return false;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// The 2 core spaces are RW->RO
|
|
FileMapRegion* FileMapInfo::first_core_region() const {
|
|
return region_at(AOTMetaspace::rw);
|
|
}
|
|
|
|
FileMapRegion* FileMapInfo::last_core_region() const {
|
|
return region_at(AOTMetaspace::ro);
|
|
}
|
|
|
|
void FileMapInfo::print(outputStream* st) const {
|
|
header()->print(st);
|
|
if (!is_static()) {
|
|
dynamic_header()->print(st);
|
|
}
|
|
}
|
|
|
|
void FileMapHeader::set_as_offset(char* p, size_t *offset) {
|
|
*offset = ArchiveBuilder::current()->any_to_offset((address)p);
|
|
}
|
|
|
|
int FileMapHeader::compute_crc() {
|
|
char* start = (char*)this;
|
|
// start computing from the field after _header_size to end of base archive name.
|
|
char* buf = (char*)&(_generic_header._header_size) + sizeof(_generic_header._header_size);
|
|
size_t sz = header_size() - (buf - start);
|
|
int crc = ClassLoader::crc32(0, buf, (jint)sz);
|
|
return crc;
|
|
}
|
|
|
|
// This function should only be called during run time with UseSharedSpaces enabled.
|
|
bool FileMapHeader::validate() {
|
|
const char* file_type = CDSConfig::type_of_archive_being_loaded();
|
|
if (_obj_alignment != ObjectAlignmentInBytes) {
|
|
AOTMetaspace::report_loading_error("The %s's ObjectAlignmentInBytes of %d"
|
|
" does not equal the current ObjectAlignmentInBytes of %d.",
|
|
file_type, _obj_alignment, ObjectAlignmentInBytes);
|
|
return false;
|
|
}
|
|
if (_compact_strings != CompactStrings) {
|
|
AOTMetaspace::report_loading_error("The %s's CompactStrings setting (%s)"
|
|
" does not equal the current CompactStrings setting (%s).", file_type,
|
|
_compact_strings ? "enabled" : "disabled",
|
|
CompactStrings ? "enabled" : "disabled");
|
|
return false;
|
|
}
|
|
bool jvmci_compiler_is_enabled = CompilerConfig::is_jvmci_compiler_enabled();
|
|
CompilerType compiler_type = CompilerConfig::compiler_type();
|
|
CompilerType archive_compiler_type = CompilerType(_compiler_type);
|
|
// JVMCI compiler does different type profiling settigns and generate
|
|
// different code. We can't use archive which was produced
|
|
// without it and reverse.
|
|
// Only allow mix when JIT compilation is disabled.
|
|
// Interpreter is used by default when dumping archive.
|
|
bool intepreter_is_used = (archive_compiler_type == CompilerType::compiler_none) ||
|
|
(compiler_type == CompilerType::compiler_none);
|
|
if (!intepreter_is_used &&
|
|
jvmci_compiler_is_enabled != (archive_compiler_type == CompilerType::compiler_jvmci)) {
|
|
AOTMetaspace::report_loading_error("The %s's JIT compiler setting (%s)"
|
|
" does not equal the current setting (%s).", file_type,
|
|
compilertype2name(archive_compiler_type), compilertype2name(compiler_type));
|
|
return false;
|
|
}
|
|
if (TrainingData::have_data()) {
|
|
if (_type_profile_level != TypeProfileLevel) {
|
|
AOTMetaspace::report_loading_error("The %s's TypeProfileLevel setting (%d)"
|
|
" does not equal the current TypeProfileLevel setting (%d).", file_type,
|
|
_type_profile_level, TypeProfileLevel);
|
|
return false;
|
|
}
|
|
if (_type_profile_args_limit != TypeProfileArgsLimit) {
|
|
AOTMetaspace::report_loading_error("The %s's TypeProfileArgsLimit setting (%d)"
|
|
" does not equal the current TypeProfileArgsLimit setting (%d).", file_type,
|
|
_type_profile_args_limit, TypeProfileArgsLimit);
|
|
return false;
|
|
}
|
|
if (_type_profile_parms_limit != TypeProfileParmsLimit) {
|
|
AOTMetaspace::report_loading_error("The %s's TypeProfileParamsLimit setting (%d)"
|
|
" does not equal the current TypeProfileParamsLimit setting (%d).", file_type,
|
|
_type_profile_args_limit, TypeProfileArgsLimit);
|
|
return false;
|
|
|
|
}
|
|
if (_type_profile_width != TypeProfileWidth) {
|
|
AOTMetaspace::report_loading_error("The %s's TypeProfileWidth setting (%d)"
|
|
" does not equal the current TypeProfileWidth setting (%d).", file_type,
|
|
(int)_type_profile_width, (int)TypeProfileWidth);
|
|
return false;
|
|
|
|
}
|
|
if (_bci_profile_width != BciProfileWidth) {
|
|
AOTMetaspace::report_loading_error("The %s's BciProfileWidth setting (%d)"
|
|
" does not equal the current BciProfileWidth setting (%d).", file_type,
|
|
(int)_bci_profile_width, (int)BciProfileWidth);
|
|
return false;
|
|
}
|
|
if (_type_profile_casts != TypeProfileCasts) {
|
|
AOTMetaspace::report_loading_error("The %s's TypeProfileCasts setting (%s)"
|
|
" does not equal the current TypeProfileCasts setting (%s).", file_type,
|
|
_type_profile_casts ? "enabled" : "disabled",
|
|
TypeProfileCasts ? "enabled" : "disabled");
|
|
|
|
return false;
|
|
|
|
}
|
|
if (_profile_traps != ProfileTraps) {
|
|
AOTMetaspace::report_loading_error("The %s's ProfileTraps setting (%s)"
|
|
" does not equal the current ProfileTraps setting (%s).", file_type,
|
|
_profile_traps ? "enabled" : "disabled",
|
|
ProfileTraps ? "enabled" : "disabled");
|
|
|
|
return false;
|
|
}
|
|
if (_spec_trap_limit_extra_entries != SpecTrapLimitExtraEntries) {
|
|
AOTMetaspace::report_loading_error("The %s's SpecTrapLimitExtraEntries setting (%d)"
|
|
" does not equal the current SpecTrapLimitExtraEntries setting (%d).", file_type,
|
|
_spec_trap_limit_extra_entries, SpecTrapLimitExtraEntries);
|
|
return false;
|
|
|
|
}
|
|
}
|
|
|
|
// This must be done after header validation because it might change the
|
|
// header data
|
|
const char* prop = Arguments::get_property("java.system.class.loader");
|
|
if (prop != nullptr) {
|
|
if (has_aot_linked_classes()) {
|
|
AOTMetaspace::report_loading_error("%s has aot-linked classes. It cannot be used when the "
|
|
"java.system.class.loader property is specified.",
|
|
CDSConfig::type_of_archive_being_loaded());
|
|
return false;
|
|
}
|
|
aot_log_warning(aot)("Archived non-system classes are disabled because the "
|
|
"java.system.class.loader property is specified (value = \"%s\"). "
|
|
"To use archived non-system classes, this property must not be set", prop);
|
|
_has_platform_or_app_classes = false;
|
|
}
|
|
|
|
|
|
if (!_verify_local && BytecodeVerificationLocal) {
|
|
// we cannot load boot classes, so there's no point of using the CDS archive
|
|
AOTMetaspace::report_loading_error("The %s's BytecodeVerificationLocal setting (%s)"
|
|
" does not equal the current BytecodeVerificationLocal setting (%s).", file_type,
|
|
_verify_local ? "enabled" : "disabled",
|
|
BytecodeVerificationLocal ? "enabled" : "disabled");
|
|
return false;
|
|
}
|
|
|
|
// For backwards compatibility, we don't check the BytecodeVerificationRemote setting
|
|
// if the archive only contains system classes.
|
|
if (_has_platform_or_app_classes
|
|
&& !_verify_remote // we didn't verify the archived platform/app classes
|
|
&& BytecodeVerificationRemote) { // but we want to verify all loaded platform/app classes
|
|
aot_log_info(aot)("The %s was created with less restrictive "
|
|
"verification setting than the current setting.", file_type);
|
|
// Pretend that we didn't have any archived platform/app classes, so they won't be loaded
|
|
// by SystemDictionaryShared.
|
|
_has_platform_or_app_classes = false;
|
|
}
|
|
|
|
aot_log_info(aot)("The %s was created with UseCompressedOops = %d, UseCompressedClassPointers = %d, UseCompactObjectHeaders = %d",
|
|
file_type, compressed_oops(), compressed_class_pointers(), compact_headers());
|
|
if (compressed_oops() != UseCompressedOops || compressed_class_pointers() != UseCompressedClassPointers) {
|
|
aot_log_warning(aot)("Unable to use %s.\nThe saved state of UseCompressedOops and UseCompressedClassPointers is "
|
|
"different from runtime, CDS will be disabled.", file_type);
|
|
return false;
|
|
}
|
|
|
|
if (compact_headers() != UseCompactObjectHeaders) {
|
|
aot_log_warning(aot)("Unable to use %s.\nThe %s's UseCompactObjectHeaders setting (%s)"
|
|
" does not equal the current UseCompactObjectHeaders setting (%s).", file_type, file_type,
|
|
_compact_headers ? "enabled" : "disabled",
|
|
UseCompactObjectHeaders ? "enabled" : "disabled");
|
|
return false;
|
|
}
|
|
|
|
if (!_use_optimized_module_handling && !CDSConfig::is_dumping_final_static_archive()) {
|
|
CDSConfig::stop_using_optimized_module_handling();
|
|
aot_log_info(aot)("optimized module handling: disabled because archive was created without optimized module handling");
|
|
}
|
|
|
|
if (is_static()) {
|
|
// Only the static archive can contain the full module graph.
|
|
if (!_has_full_module_graph) {
|
|
CDSConfig::stop_using_full_module_graph("archive was created without full module graph");
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool FileMapInfo::validate_header() {
|
|
if (!header()->validate()) {
|
|
return false;
|
|
}
|
|
if (_is_static) {
|
|
return true;
|
|
} else {
|
|
return DynamicArchive::validate(this);
|
|
}
|
|
}
|
|
|
|
#if INCLUDE_JVMTI
|
|
ClassPathEntry** FileMapInfo::_classpath_entries_for_jvmti = nullptr;
|
|
|
|
ClassPathEntry* FileMapInfo::get_classpath_entry_for_jvmti(int i, TRAPS) {
|
|
if (i == 0) {
|
|
// index 0 corresponds to the ClassPathImageEntry which is a globally shared object
|
|
// and should never be deleted.
|
|
return ClassLoader::get_jrt_entry();
|
|
}
|
|
ClassPathEntry* ent = _classpath_entries_for_jvmti[i];
|
|
if (ent == nullptr) {
|
|
const AOTClassLocation* cl = AOTClassLocationConfig::runtime()->class_location_at(i);
|
|
const char* path = cl->path();
|
|
struct stat st;
|
|
if (os::stat(path, &st) != 0) {
|
|
char *msg = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(path) + 128);
|
|
jio_snprintf(msg, strlen(path) + 127, "error in finding JAR file %s", path);
|
|
THROW_MSG_(vmSymbols::java_io_IOException(), msg, nullptr);
|
|
} else {
|
|
ent = ClassLoader::create_class_path_entry(THREAD, path, &st);
|
|
if (ent == nullptr) {
|
|
char *msg = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(path) + 128);
|
|
jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path);
|
|
THROW_MSG_(vmSymbols::java_io_IOException(), msg, nullptr);
|
|
}
|
|
}
|
|
|
|
MutexLocker mu(THREAD, CDSClassFileStream_lock);
|
|
if (_classpath_entries_for_jvmti[i] == nullptr) {
|
|
_classpath_entries_for_jvmti[i] = ent;
|
|
} else {
|
|
// Another thread has beat me to creating this entry
|
|
delete ent;
|
|
ent = _classpath_entries_for_jvmti[i];
|
|
}
|
|
}
|
|
|
|
return ent;
|
|
}
|
|
|
|
ClassFileStream* FileMapInfo::open_stream_for_jvmti(InstanceKlass* ik, Handle class_loader, TRAPS) {
|
|
int path_index = ik->shared_classpath_index();
|
|
assert(path_index >= 0, "should be called for shared built-in classes only");
|
|
assert(path_index < AOTClassLocationConfig::runtime()->length(), "sanity");
|
|
|
|
ClassPathEntry* cpe = get_classpath_entry_for_jvmti(path_index, CHECK_NULL);
|
|
assert(cpe != nullptr, "must be");
|
|
|
|
Symbol* name = ik->name();
|
|
const char* const class_name = name->as_C_string();
|
|
const char* const file_name = ClassLoader::file_name_for_class_name(class_name,
|
|
name->utf8_length());
|
|
ClassLoaderData* loader_data = ClassLoaderData::class_loader_data(class_loader());
|
|
const AOTClassLocation* cl = AOTClassLocationConfig::runtime()->class_location_at(path_index);
|
|
ClassFileStream* cfs;
|
|
if (class_loader() != nullptr && cl->is_multi_release_jar()) {
|
|
// This class was loaded from a multi-release JAR file during dump time. The
|
|
// process for finding its classfile is complex. Let's defer to the Java code
|
|
// in java.lang.ClassLoader.
|
|
cfs = get_stream_from_class_loader(class_loader, cpe, file_name, CHECK_NULL);
|
|
} else {
|
|
cfs = cpe->open_stream_for_loader(THREAD, file_name, loader_data);
|
|
}
|
|
assert(cfs != nullptr, "must be able to read the classfile data of shared classes for built-in loaders.");
|
|
log_debug(aot, jvmti)("classfile data for %s [%d: %s] = %d bytes", class_name, path_index,
|
|
cfs->source(), cfs->length());
|
|
return cfs;
|
|
}
|
|
|
|
ClassFileStream* FileMapInfo::get_stream_from_class_loader(Handle class_loader,
|
|
ClassPathEntry* cpe,
|
|
const char* file_name,
|
|
TRAPS) {
|
|
JavaValue result(T_OBJECT);
|
|
oop class_name = java_lang_String::create_oop_from_str(file_name, THREAD);
|
|
Handle h_class_name = Handle(THREAD, class_name);
|
|
|
|
// byte[] ClassLoader.getResourceAsByteArray(String name)
|
|
JavaCalls::call_virtual(&result,
|
|
class_loader,
|
|
vmClasses::ClassLoader_klass(),
|
|
vmSymbols::getResourceAsByteArray_name(),
|
|
vmSymbols::getResourceAsByteArray_signature(),
|
|
h_class_name,
|
|
CHECK_NULL);
|
|
assert(result.get_type() == T_OBJECT, "just checking");
|
|
oop obj = result.get_oop();
|
|
assert(obj != nullptr, "ClassLoader.getResourceAsByteArray should not return null");
|
|
|
|
// copy from byte[] to a buffer
|
|
typeArrayOop ba = typeArrayOop(obj);
|
|
jint len = ba->length();
|
|
u1* buffer = NEW_RESOURCE_ARRAY(u1, len);
|
|
ArrayAccess<>::arraycopy_to_native<>(ba, typeArrayOopDesc::element_offset<jbyte>(0), buffer, len);
|
|
|
|
return new ClassFileStream(buffer, len, cpe->name());
|
|
}
|
|
#endif
|