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2784 lines
108 KiB
C++
2784 lines
108 KiB
C++
/*
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* Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "cds/archiveBuilder.hpp"
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#include "cds/archiveHeapLoader.inline.hpp"
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#include "cds/archiveHeapWriter.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/dynamicArchive.hpp"
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#include "cds/filemap.hpp"
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#include "cds/heapShared.hpp"
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#include "cds/metaspaceShared.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/classLoaderExt.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 "jvm.h"
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#include "logging/log.hpp"
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#include "logging/logStream.hpp"
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#include "logging/logMessage.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 "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 "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/mutexLocker.hpp"
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#include "runtime/os.hpp"
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#include "runtime/vm_version.hpp"
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#include "services/memTracker.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/heapRegion.hpp"
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#endif
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# include <sys/stat.h>
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# include <errno.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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// Complain and stop. All error conditions occurring during the writing of
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// an archive file should stop the process. Unrecoverable errors during
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// the reading of the archive file should stop the process.
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static void fail_exit(const char *msg, va_list ap) {
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// This occurs very early during initialization: tty is not initialized.
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jio_fprintf(defaultStream::error_stream(),
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"An error has occurred while processing the"
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" shared archive file.\n");
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jio_vfprintf(defaultStream::error_stream(), msg, ap);
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jio_fprintf(defaultStream::error_stream(), "\n");
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// Do not change the text of the below message because some tests check for it.
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vm_exit_during_initialization("Unable to use shared archive.", nullptr);
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}
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void FileMapInfo::fail_stop(const char *msg, ...) {
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va_list ap;
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va_start(ap, msg);
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fail_exit(msg, ap); // Never returns.
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va_end(ap); // for completeness.
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}
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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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header_version[JVM_IDENT_MAX-1] = 0; // Null terminate.
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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::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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size_t longest_common_prefix_size = 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 = Arguments::get_default_shared_archive_path();
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const char* current_base_archive_name = Arguments::GetSharedArchivePath();
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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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ResourceMark rm;
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GrowableArray<const char*>* app_cp_array = create_dumptime_app_classpath_array();
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int len = app_cp_array->length();
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longest_common_prefix_size = longest_common_app_classpath_prefix_len(len, app_cp_array);
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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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longest_common_prefix_size);
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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, size_t common_app_classpath_prefix_size) {
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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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set_common_app_classpath_prefix_size((unsigned int)common_app_classpath_prefix_size);
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set_magic(DynamicDumpSharedSpaces ? CDS_DYNAMIC_ARCHIVE_MAGIC : CDS_ARCHIVE_MAGIC);
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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(Arguments::GetSharedArchivePath());
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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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if (DumpSharedSpaces && HeapShared::can_write()) {
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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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if (UseCompressedOops) {
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_heap_begin = CompressedOops::begin();
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_heap_end = CompressedOops::end();
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} else {
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#if INCLUDE_G1GC
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address start = (address)G1CollectedHeap::heap()->reserved().start();
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address end = (address)G1CollectedHeap::heap()->reserved().end();
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_heap_begin = HeapShared::to_requested_address(start);
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_heap_end = HeapShared::to_requested_address(end);
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#endif
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}
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}
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_compressed_oops = UseCompressedOops;
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_compressed_class_ptrs = UseCompressedClassPointers;
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_max_heap_size = MaxHeapSize;
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_narrow_klass_shift = CompressedKlassPointers::shift();
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_use_optimized_module_handling = MetaspaceShared::use_optimized_module_handling();
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_use_full_module_graph = MetaspaceShared::use_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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_app_class_paths_start_index = ClassLoaderExt::app_class_paths_start_index();
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_app_module_paths_start_index = ClassLoaderExt::app_module_paths_start_index();
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_num_module_paths = ClassLoader::num_module_path_entries();
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_max_used_path_index = ClassLoaderExt::max_used_path_index();
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_verify_local = BytecodeVerificationLocal;
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_verify_remote = BytecodeVerificationRemote;
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_has_platform_or_app_classes = ClassLoaderExt::has_platform_or_app_classes();
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_has_non_jar_in_classpath = ClassLoaderExt::has_non_jar_in_classpath();
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_requested_base_address = (char*)SharedBaseAddress;
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_mapped_base_address = (char*)SharedBaseAddress;
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_allow_archiving_with_java_agent = AllowArchivingWithJavaAgent;
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if (!DynamicDumpSharedSpaces) {
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set_shared_path_table(info->_shared_path_table);
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}
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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("- common_app_classpath_size: " UINT32_FORMAT, common_app_classpath_prefix_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: " SIZE_FORMAT, _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_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("- max_heap_size: " UINTX_FORMAT, _max_heap_size);
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st->print_cr("- narrow_oop_mode: %d", _narrow_oop_mode);
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st->print_cr("- narrow_klass_shift: %d", _narrow_klass_shift);
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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("- cloned_vtables_offset: " SIZE_FORMAT_X, _cloned_vtables_offset);
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st->print_cr("- serialized_data_offset: " SIZE_FORMAT_X, _serialized_data_offset);
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st->print_cr("- heap_begin: " INTPTR_FORMAT, p2i(_heap_begin));
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st->print_cr("- heap_end: " INTPTR_FORMAT, p2i(_heap_end));
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st->print_cr("- jvm_ident: %s", _jvm_ident);
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st->print_cr("- shared_path_table_offset: " SIZE_FORMAT_X, _shared_path_table_offset);
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st->print_cr("- shared_path_table_size: %d", _shared_path_table_size);
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st->print_cr("- app_class_paths_start_index: %d", _app_class_paths_start_index);
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st->print_cr("- app_module_paths_start_index: %d", _app_module_paths_start_index);
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st->print_cr("- num_module_paths: %d", _num_module_paths);
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st->print_cr("- max_used_path_index: %d", _max_used_path_index);
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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("- has_non_jar_in_classpath: %d", _has_non_jar_in_classpath);
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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("- allow_archiving_with_java_agent:%d", _allow_archiving_with_java_agent);
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st->print_cr("- use_optimized_module_handling: %d", _use_optimized_module_handling);
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st->print_cr("- use_full_module_graph %d", _use_full_module_graph);
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st->print_cr("- ptrmap_size_in_bits: " SIZE_FORMAT, _ptrmap_size_in_bits);
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}
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void SharedClassPathEntry::init_as_non_existent(const char* path, TRAPS) {
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_type = non_existent_entry;
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set_name(path, CHECK);
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}
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void SharedClassPathEntry::init(bool is_modules_image,
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bool is_module_path,
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ClassPathEntry* cpe, TRAPS) {
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Arguments::assert_is_dumping_archive();
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_timestamp = 0;
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_filesize = 0;
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_from_class_path_attr = false;
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struct stat st;
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if (os::stat(cpe->name(), &st) == 0) {
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if ((st.st_mode & S_IFMT) == S_IFDIR) {
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_type = dir_entry;
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} else {
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// The timestamp of the modules_image is not checked at runtime.
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if (is_modules_image) {
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_type = modules_image_entry;
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} else {
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_type = jar_entry;
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_timestamp = st.st_mtime;
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_from_class_path_attr = cpe->from_class_path_attr();
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}
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_filesize = st.st_size;
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_is_module_path = is_module_path;
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}
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} else {
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// The file/dir must exist, or it would not have been added
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// into ClassLoader::classpath_entry().
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//
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// If we can't access a jar file in the boot path, then we can't
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// make assumptions about where classes get loaded from.
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FileMapInfo::fail_stop("Unable to open file %s.", cpe->name());
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}
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// No need to save the name of the module file, as it will be computed at run time
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// to allow relocation of the JDK directory.
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const char* name = is_modules_image ? "" : cpe->name();
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set_name(name, CHECK);
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}
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void SharedClassPathEntry::set_name(const char* name, TRAPS) {
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size_t len = strlen(name) + 1;
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_name = MetadataFactory::new_array<char>(ClassLoaderData::the_null_class_loader_data(), (int)len, CHECK);
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strcpy(_name->data(), name);
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}
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void SharedClassPathEntry::copy_from(SharedClassPathEntry* ent, ClassLoaderData* loader_data, TRAPS) {
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_type = ent->_type;
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_is_module_path = ent->_is_module_path;
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_timestamp = ent->_timestamp;
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_filesize = ent->_filesize;
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_from_class_path_attr = ent->_from_class_path_attr;
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set_name(ent->name(), CHECK);
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if (ent->is_jar() && !ent->is_signed() && ent->manifest() != nullptr) {
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Array<u1>* buf = MetadataFactory::new_array<u1>(loader_data,
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ent->manifest_size(),
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CHECK);
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char* p = (char*)(buf->data());
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memcpy(p, ent->manifest(), ent->manifest_size());
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set_manifest(buf);
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}
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}
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const char* SharedClassPathEntry::name() const {
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if (UseSharedSpaces && is_modules_image()) {
|
|
// In order to validate the runtime modules image file size against the archived
|
|
// size information, we need to obtain the runtime modules image path. The recorded
|
|
// dump time modules image path in the archive may be different from the runtime path
|
|
// if the JDK image has beed moved after generating the archive.
|
|
return ClassLoader::get_jrt_entry()->name();
|
|
} else {
|
|
return _name->data();
|
|
}
|
|
}
|
|
|
|
bool SharedClassPathEntry::validate(bool is_class_path) const {
|
|
assert(UseSharedSpaces, "runtime only");
|
|
|
|
struct stat st;
|
|
const char* name = this->name();
|
|
|
|
bool ok = true;
|
|
log_info(class, path)("checking shared classpath entry: %s", name);
|
|
if (os::stat(name, &st) != 0 && is_class_path) {
|
|
// If the archived module path entry does not exist at runtime, it is not fatal
|
|
// (no need to invalid the shared archive) because the shared runtime visibility check
|
|
// filters out any archived module classes that do not have a matching runtime
|
|
// module path location.
|
|
log_warning(cds)("Required classpath entry does not exist: %s", name);
|
|
ok = false;
|
|
} else if (is_dir()) {
|
|
if (!os::dir_is_empty(name)) {
|
|
log_warning(cds)("directory is not empty: %s", name);
|
|
ok = false;
|
|
}
|
|
} else if ((has_timestamp() && _timestamp != st.st_mtime) ||
|
|
_filesize != st.st_size) {
|
|
ok = false;
|
|
if (PrintSharedArchiveAndExit) {
|
|
log_warning(cds)(_timestamp != st.st_mtime ?
|
|
"Timestamp mismatch" :
|
|
"File size mismatch");
|
|
} else {
|
|
const char* bad_jar_msg = "A jar file is not the one used while building the shared archive file:";
|
|
log_warning(cds)("%s %s", bad_jar_msg, name);
|
|
if (!log_is_enabled(Info, cds)) {
|
|
log_warning(cds)("%s %s", bad_jar_msg, name);
|
|
}
|
|
if (_timestamp != st.st_mtime) {
|
|
log_warning(cds)("%s timestamp has changed.", name);
|
|
} else {
|
|
log_warning(cds)("%s size has changed.", name);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (PrintSharedArchiveAndExit && !ok) {
|
|
// If PrintSharedArchiveAndExit is enabled, don't report failure to the
|
|
// caller. Please see above comments for more details.
|
|
ok = true;
|
|
MetaspaceShared::set_archive_loading_failed();
|
|
}
|
|
return ok;
|
|
}
|
|
|
|
bool SharedClassPathEntry::check_non_existent() const {
|
|
assert(_type == non_existent_entry, "must be");
|
|
log_info(class, path)("should be non-existent: %s", name());
|
|
struct stat st;
|
|
if (os::stat(name(), &st) != 0) {
|
|
log_info(class, path)("ok");
|
|
return true; // file doesn't exist
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
void SharedClassPathEntry::metaspace_pointers_do(MetaspaceClosure* it) {
|
|
it->push(&_name);
|
|
it->push(&_manifest);
|
|
}
|
|
|
|
void SharedPathTable::metaspace_pointers_do(MetaspaceClosure* it) {
|
|
it->push(&_table);
|
|
for (int i=0; i<_size; i++) {
|
|
path_at(i)->metaspace_pointers_do(it);
|
|
}
|
|
}
|
|
|
|
void SharedPathTable::dumptime_init(ClassLoaderData* loader_data, TRAPS) {
|
|
size_t entry_size = sizeof(SharedClassPathEntry);
|
|
int num_entries = 0;
|
|
num_entries += ClassLoader::num_boot_classpath_entries();
|
|
num_entries += ClassLoader::num_app_classpath_entries();
|
|
num_entries += ClassLoader::num_module_path_entries();
|
|
num_entries += FileMapInfo::num_non_existent_class_paths();
|
|
size_t bytes = entry_size * num_entries;
|
|
|
|
_table = MetadataFactory::new_array<u8>(loader_data, (int)bytes, CHECK);
|
|
_size = num_entries;
|
|
}
|
|
|
|
// Make a copy of the _shared_path_table for use during dynamic CDS dump.
|
|
// It is needed because some Java code continues to execute after dynamic dump has finished.
|
|
// However, during dynamic dump, we have modified FileMapInfo::_shared_path_table so
|
|
// FileMapInfo::shared_path(i) returns incorrect information in ClassLoader::record_result().
|
|
void FileMapInfo::copy_shared_path_table(ClassLoaderData* loader_data, TRAPS) {
|
|
size_t entry_size = sizeof(SharedClassPathEntry);
|
|
size_t bytes = entry_size * _shared_path_table.size();
|
|
|
|
Array<u8>* array = MetadataFactory::new_array<u8>(loader_data, (int)bytes, CHECK);
|
|
_saved_shared_path_table = SharedPathTable(array, _shared_path_table.size());
|
|
|
|
for (int i = 0; i < _shared_path_table.size(); i++) {
|
|
_saved_shared_path_table.path_at(i)->copy_from(shared_path(i), loader_data, CHECK);
|
|
}
|
|
_saved_shared_path_table_array = array;
|
|
}
|
|
|
|
void FileMapInfo::clone_shared_path_table(TRAPS) {
|
|
Arguments::assert_is_dumping_archive();
|
|
|
|
ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
|
|
ClassPathEntry* jrt = ClassLoader::get_jrt_entry();
|
|
|
|
assert(jrt != nullptr,
|
|
"No modular java runtime image present when allocating the CDS classpath entry table");
|
|
|
|
if (_saved_shared_path_table_array != nullptr) {
|
|
MetadataFactory::free_array<u8>(loader_data, _saved_shared_path_table_array);
|
|
_saved_shared_path_table_array = nullptr;
|
|
}
|
|
|
|
copy_shared_path_table(loader_data, CHECK);
|
|
}
|
|
|
|
void FileMapInfo::allocate_shared_path_table(TRAPS) {
|
|
Arguments::assert_is_dumping_archive();
|
|
|
|
ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
|
|
ClassPathEntry* jrt = ClassLoader::get_jrt_entry();
|
|
|
|
assert(jrt != nullptr,
|
|
"No modular java runtime image present when allocating the CDS classpath entry table");
|
|
|
|
_shared_path_table.dumptime_init(loader_data, CHECK);
|
|
|
|
// 1. boot class path
|
|
int i = 0;
|
|
i = add_shared_classpaths(i, "boot", jrt, CHECK);
|
|
i = add_shared_classpaths(i, "app", ClassLoader::app_classpath_entries(), CHECK);
|
|
i = add_shared_classpaths(i, "module", ClassLoader::module_path_entries(), CHECK);
|
|
|
|
for (int x = 0; x < num_non_existent_class_paths(); x++, i++) {
|
|
const char* path = _non_existent_class_paths->at(x);
|
|
shared_path(i)->init_as_non_existent(path, CHECK);
|
|
}
|
|
|
|
assert(i == _shared_path_table.size(), "number of shared path entry mismatch");
|
|
clone_shared_path_table(CHECK);
|
|
}
|
|
|
|
int FileMapInfo::add_shared_classpaths(int i, const char* which, ClassPathEntry *cpe, TRAPS) {
|
|
while (cpe != nullptr) {
|
|
bool is_jrt = (cpe == ClassLoader::get_jrt_entry());
|
|
bool is_module_path = i >= ClassLoaderExt::app_module_paths_start_index();
|
|
const char* type = (is_jrt ? "jrt" : (cpe->is_jar_file() ? "jar" : "dir"));
|
|
log_info(class, path)("add %s shared path (%s) %s", which, type, cpe->name());
|
|
SharedClassPathEntry* ent = shared_path(i);
|
|
ent->init(is_jrt, is_module_path, cpe, CHECK_0);
|
|
if (cpe->is_jar_file()) {
|
|
update_jar_manifest(cpe, ent, CHECK_0);
|
|
}
|
|
if (is_jrt) {
|
|
cpe = ClassLoader::get_next_boot_classpath_entry(cpe);
|
|
} else {
|
|
cpe = cpe->next();
|
|
}
|
|
i++;
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
void FileMapInfo::check_nonempty_dir_in_shared_path_table() {
|
|
Arguments::assert_is_dumping_archive();
|
|
|
|
bool has_nonempty_dir = false;
|
|
|
|
int last = _shared_path_table.size() - 1;
|
|
if (last > ClassLoaderExt::max_used_path_index()) {
|
|
// no need to check any path beyond max_used_path_index
|
|
last = ClassLoaderExt::max_used_path_index();
|
|
}
|
|
|
|
for (int i = 0; i <= last; i++) {
|
|
SharedClassPathEntry *e = shared_path(i);
|
|
if (e->is_dir()) {
|
|
const char* path = e->name();
|
|
if (!os::dir_is_empty(path)) {
|
|
log_error(cds)("Error: non-empty directory '%s'", path);
|
|
has_nonempty_dir = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (has_nonempty_dir) {
|
|
ClassLoader::exit_with_path_failure("Cannot have non-empty directory in paths", nullptr);
|
|
}
|
|
}
|
|
|
|
void FileMapInfo::record_non_existent_class_path_entry(const char* path) {
|
|
Arguments::assert_is_dumping_archive();
|
|
log_info(class, path)("non-existent Class-Path entry %s", path);
|
|
if (_non_existent_class_paths == nullptr) {
|
|
_non_existent_class_paths = new (mtClass) GrowableArray<const char*>(10, mtClass);
|
|
}
|
|
_non_existent_class_paths->append(os::strdup(path));
|
|
}
|
|
|
|
int FileMapInfo::num_non_existent_class_paths() {
|
|
Arguments::assert_is_dumping_archive();
|
|
if (_non_existent_class_paths != nullptr) {
|
|
return _non_existent_class_paths->length();
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int FileMapInfo::get_module_shared_path_index(Symbol* location) {
|
|
if (location->starts_with("jrt:", 4) && get_number_of_shared_paths() > 0) {
|
|
assert(shared_path(0)->is_modules_image(), "first shared_path must be the modules image");
|
|
return 0;
|
|
}
|
|
|
|
if (ClassLoaderExt::app_module_paths_start_index() >= get_number_of_shared_paths()) {
|
|
// The archive(s) were created without --module-path option
|
|
return -1;
|
|
}
|
|
|
|
if (!location->starts_with("file:", 5)) {
|
|
return -1;
|
|
}
|
|
|
|
// skip_uri_protocol was also called during dump time -- see ClassLoaderExt::process_module_table()
|
|
ResourceMark rm;
|
|
const char* file = ClassLoader::skip_uri_protocol(location->as_C_string());
|
|
for (int i = ClassLoaderExt::app_module_paths_start_index(); i < get_number_of_shared_paths(); i++) {
|
|
SharedClassPathEntry* ent = shared_path(i);
|
|
assert(ent->in_named_module(), "must be");
|
|
bool cond = strcmp(file, ent->name()) == 0;
|
|
log_debug(class, path)("get_module_shared_path_index (%d) %s : %s = %s", i,
|
|
location->as_C_string(), ent->name(), cond ? "same" : "different");
|
|
if (cond) {
|
|
return i;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
class ManifestStream: public ResourceObj {
|
|
private:
|
|
u1* _buffer_start; // Buffer bottom
|
|
u1* _buffer_end; // Buffer top (one past last element)
|
|
u1* _current; // Current buffer position
|
|
|
|
public:
|
|
// Constructor
|
|
ManifestStream(u1* buffer, int length) : _buffer_start(buffer),
|
|
_current(buffer) {
|
|
_buffer_end = buffer + length;
|
|
}
|
|
|
|
static bool is_attr(u1* attr, const char* name) {
|
|
return strncmp((const char*)attr, name, strlen(name)) == 0;
|
|
}
|
|
|
|
static char* copy_attr(u1* value, size_t len) {
|
|
char* buf = NEW_RESOURCE_ARRAY(char, len + 1);
|
|
strncpy(buf, (char*)value, len);
|
|
buf[len] = 0;
|
|
return buf;
|
|
}
|
|
|
|
// The return value indicates if the JAR is signed or not
|
|
bool check_is_signed() {
|
|
u1* attr = _current;
|
|
bool isSigned = false;
|
|
while (_current < _buffer_end) {
|
|
if (*_current == '\n') {
|
|
*_current = '\0';
|
|
u1* value = (u1*)strchr((char*)attr, ':');
|
|
if (value != nullptr) {
|
|
assert(*(value+1) == ' ', "Unrecognized format" );
|
|
if (strstr((char*)attr, "-Digest") != nullptr) {
|
|
isSigned = true;
|
|
break;
|
|
}
|
|
}
|
|
*_current = '\n'; // restore
|
|
attr = _current + 1;
|
|
}
|
|
_current ++;
|
|
}
|
|
return isSigned;
|
|
}
|
|
};
|
|
|
|
void FileMapInfo::update_jar_manifest(ClassPathEntry *cpe, SharedClassPathEntry* ent, TRAPS) {
|
|
ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
|
|
ResourceMark rm(THREAD);
|
|
jint manifest_size;
|
|
|
|
assert(cpe->is_jar_file() && ent->is_jar(), "the shared class path entry is not a JAR file");
|
|
char* manifest = ClassLoaderExt::read_manifest(THREAD, cpe, &manifest_size);
|
|
if (manifest != nullptr) {
|
|
ManifestStream* stream = new ManifestStream((u1*)manifest,
|
|
manifest_size);
|
|
if (stream->check_is_signed()) {
|
|
ent->set_is_signed();
|
|
} else {
|
|
// Copy the manifest into the shared archive
|
|
manifest = ClassLoaderExt::read_raw_manifest(THREAD, cpe, &manifest_size);
|
|
Array<u1>* buf = MetadataFactory::new_array<u1>(loader_data,
|
|
manifest_size,
|
|
CHECK);
|
|
char* p = (char*)(buf->data());
|
|
memcpy(p, manifest, manifest_size);
|
|
ent->set_manifest(buf);
|
|
}
|
|
}
|
|
}
|
|
|
|
char* FileMapInfo::skip_first_path_entry(const char* path) {
|
|
size_t path_sep_len = strlen(os::path_separator());
|
|
char* p = strstr((char*)path, os::path_separator());
|
|
if (p != nullptr) {
|
|
debug_only( {
|
|
size_t image_name_len = strlen(MODULES_IMAGE_NAME);
|
|
assert(strncmp(p - image_name_len, MODULES_IMAGE_NAME, image_name_len) == 0,
|
|
"first entry must be the modules image");
|
|
} );
|
|
p += path_sep_len;
|
|
} else {
|
|
debug_only( {
|
|
assert(ClassLoader::string_ends_with(path, MODULES_IMAGE_NAME),
|
|
"first entry must be the modules image");
|
|
} );
|
|
}
|
|
return p;
|
|
}
|
|
|
|
int FileMapInfo::num_paths(const char* path) {
|
|
if (path == nullptr) {
|
|
return 0;
|
|
}
|
|
int npaths = 1;
|
|
char* p = (char*)path;
|
|
while (p != nullptr) {
|
|
char* prev = p;
|
|
p = strstr((char*)p, os::path_separator());
|
|
if (p != nullptr) {
|
|
p++;
|
|
// don't count empty path
|
|
if ((p - prev) > 1) {
|
|
npaths++;
|
|
}
|
|
}
|
|
}
|
|
return npaths;
|
|
}
|
|
|
|
// Returns true if a path within the paths exists and has non-zero size.
|
|
bool FileMapInfo::check_paths_existence(const char* paths) {
|
|
ClasspathStream cp_stream(paths);
|
|
bool exist = false;
|
|
struct stat st;
|
|
while (cp_stream.has_next()) {
|
|
const char* path = cp_stream.get_next();
|
|
if (os::stat(path, &st) == 0 && st.st_size > 0) {
|
|
exist = true;
|
|
break;
|
|
}
|
|
}
|
|
return exist;
|
|
}
|
|
|
|
GrowableArray<const char*>* FileMapInfo::create_dumptime_app_classpath_array() {
|
|
Arguments::assert_is_dumping_archive();
|
|
GrowableArray<const char*>* path_array = new GrowableArray<const char*>(10);
|
|
ClassPathEntry* cpe = ClassLoader::app_classpath_entries();
|
|
while (cpe != nullptr) {
|
|
path_array->append(cpe->name());
|
|
cpe = cpe->next();
|
|
}
|
|
return path_array;
|
|
}
|
|
|
|
GrowableArray<const char*>* FileMapInfo::create_path_array(const char* paths) {
|
|
GrowableArray<const char*>* path_array = new GrowableArray<const char*>(10);
|
|
JavaThread* current = JavaThread::current();
|
|
ClasspathStream cp_stream(paths);
|
|
bool non_jar_in_cp = header()->has_non_jar_in_classpath();
|
|
while (cp_stream.has_next()) {
|
|
const char* path = cp_stream.get_next();
|
|
if (!non_jar_in_cp) {
|
|
struct stat st;
|
|
if (os::stat(path, &st) == 0) {
|
|
path_array->append(path);
|
|
}
|
|
} else {
|
|
const char* canonical_path = ClassLoader::get_canonical_path(path, current);
|
|
if (canonical_path != nullptr) {
|
|
char* error_msg = nullptr;
|
|
jzfile* zip = ClassLoader::open_zip_file(canonical_path, &error_msg, current);
|
|
if (zip != nullptr && error_msg == nullptr) {
|
|
path_array->append(path);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return path_array;
|
|
}
|
|
|
|
bool FileMapInfo::classpath_failure(const char* msg, const char* name) {
|
|
ClassLoader::trace_class_path(msg, name);
|
|
if (PrintSharedArchiveAndExit) {
|
|
MetaspaceShared::set_archive_loading_failed();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
unsigned int FileMapInfo::longest_common_app_classpath_prefix_len(int num_paths,
|
|
GrowableArray<const char*>* rp_array) {
|
|
if (num_paths == 0) {
|
|
return 0;
|
|
}
|
|
unsigned int pos;
|
|
for (pos = 0; ; pos++) {
|
|
for (int i = 0; i < num_paths; i++) {
|
|
if (rp_array->at(i)[pos] != '\0' && rp_array->at(i)[pos] == rp_array->at(0)[pos]) {
|
|
continue;
|
|
}
|
|
// search backward for the pos before the file separator char
|
|
while (pos > 0) {
|
|
if (rp_array->at(0)[--pos] == *os::file_separator()) {
|
|
return pos + 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
bool FileMapInfo::check_paths(int shared_path_start_idx, int num_paths, GrowableArray<const char*>* rp_array,
|
|
unsigned int dumptime_prefix_len, unsigned int runtime_prefix_len) {
|
|
int i = 0;
|
|
int j = shared_path_start_idx;
|
|
while (i < num_paths) {
|
|
while (shared_path(j)->from_class_path_attr()) {
|
|
// shared_path(j) was expanded from the JAR file attribute "Class-Path:"
|
|
// during dump time. It's not included in the -classpath VM argument.
|
|
j++;
|
|
}
|
|
assert(strlen(shared_path(j)->name()) > (size_t)dumptime_prefix_len, "sanity");
|
|
const char* dumptime_path = shared_path(j)->name() + dumptime_prefix_len;
|
|
assert(strlen(rp_array->at(i)) > (size_t)runtime_prefix_len, "sanity");
|
|
const char* runtime_path = rp_array->at(i) + runtime_prefix_len;
|
|
if (!os::same_files(dumptime_path, runtime_path)) {
|
|
return true;
|
|
}
|
|
i++;
|
|
j++;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool FileMapInfo::validate_boot_class_paths() {
|
|
//
|
|
// - Archive contains boot classes only - relaxed boot path check:
|
|
// Extra path elements appended to the boot path at runtime are allowed.
|
|
//
|
|
// - Archive contains application or platform classes - strict boot path check:
|
|
// Validate the entire runtime boot path, which must be compatible
|
|
// with the dump time boot path. Appending boot path at runtime is not
|
|
// allowed.
|
|
//
|
|
|
|
// The first entry in boot path is the modules_image (guaranteed by
|
|
// ClassLoader::setup_boot_search_path()). Skip the first entry. The
|
|
// path of the runtime modules_image may be different from the dump
|
|
// time path (e.g. the JDK image is copied to a different location
|
|
// after generating the shared archive), which is acceptable. For most
|
|
// common cases, the dump time boot path might contain modules_image only.
|
|
char* runtime_boot_path = Arguments::get_boot_class_path();
|
|
char* rp = skip_first_path_entry(runtime_boot_path);
|
|
assert(shared_path(0)->is_modules_image(), "first shared_path must be the modules image");
|
|
int dp_len = header()->app_class_paths_start_index() - 1; // ignore the first path to the module image
|
|
bool mismatch = false;
|
|
|
|
bool relaxed_check = !header()->has_platform_or_app_classes();
|
|
if (dp_len == 0 && rp == nullptr) {
|
|
return true; // ok, both runtime and dump time boot paths have modules_images only
|
|
} else if (dp_len == 0 && rp != nullptr) {
|
|
if (relaxed_check) {
|
|
return true; // ok, relaxed check, runtime has extra boot append path entries
|
|
} else {
|
|
ResourceMark rm;
|
|
if (check_paths_existence(rp)) {
|
|
// If a path exists in the runtime boot paths, it is considered a mismatch
|
|
// since there's no boot path specified during dump time.
|
|
mismatch = true;
|
|
}
|
|
}
|
|
} else if (dp_len > 0 && rp != nullptr) {
|
|
int num;
|
|
ResourceMark rm;
|
|
GrowableArray<const char*>* rp_array = create_path_array(rp);
|
|
int rp_len = rp_array->length();
|
|
if (rp_len >= dp_len) {
|
|
if (relaxed_check) {
|
|
// only check the leading entries in the runtime boot path, up to
|
|
// the length of the dump time boot path
|
|
num = dp_len;
|
|
} else {
|
|
// check the full runtime boot path, must match with dump time
|
|
num = rp_len;
|
|
}
|
|
mismatch = check_paths(1, num, rp_array, 0, 0);
|
|
} else {
|
|
// create_path_array() ignores non-existing paths. Although the dump time and runtime boot classpath lengths
|
|
// are the same initially, after the call to create_path_array(), the runtime boot classpath length could become
|
|
// shorter. We consider boot classpath mismatch in this case.
|
|
mismatch = true;
|
|
}
|
|
}
|
|
|
|
if (mismatch) {
|
|
// The paths are different
|
|
return classpath_failure("[BOOT classpath mismatch, actual =", runtime_boot_path);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool FileMapInfo::validate_app_class_paths(int shared_app_paths_len) {
|
|
const char *appcp = Arguments::get_appclasspath();
|
|
assert(appcp != nullptr, "null app classpath");
|
|
int rp_len = num_paths(appcp);
|
|
bool mismatch = false;
|
|
if (rp_len < shared_app_paths_len) {
|
|
return classpath_failure("Run time APP classpath is shorter than the one at dump time: ", appcp);
|
|
}
|
|
if (shared_app_paths_len != 0 && rp_len != 0) {
|
|
// Prefix is OK: E.g., dump with -cp foo.jar, but run with -cp foo.jar:bar.jar.
|
|
ResourceMark rm;
|
|
GrowableArray<const char*>* rp_array = create_path_array(appcp);
|
|
if (rp_array->length() == 0) {
|
|
// None of the jar file specified in the runtime -cp exists.
|
|
return classpath_failure("None of the jar file specified in the runtime -cp exists: -Djava.class.path=", appcp);
|
|
}
|
|
if (rp_array->length() < shared_app_paths_len) {
|
|
// create_path_array() ignores non-existing paths. Although the dump time and runtime app classpath lengths
|
|
// are the same initially, after the call to create_path_array(), the runtime app classpath length could become
|
|
// shorter. We consider app classpath mismatch in this case.
|
|
return classpath_failure("[APP classpath mismatch, actual: -Djava.class.path=", appcp);
|
|
}
|
|
|
|
// Handling of non-existent entries in the classpath: we eliminate all the non-existent
|
|
// entries from both the dump time classpath (ClassLoader::update_class_path_entry_list)
|
|
// and the runtime classpath (FileMapInfo::create_path_array), and check the remaining
|
|
// entries. E.g.:
|
|
//
|
|
// dump : -cp a.jar:NE1:NE2:b.jar -> a.jar:b.jar -> recorded in archive.
|
|
// run 1: -cp NE3:a.jar:NE4:b.jar -> a.jar:b.jar -> matched
|
|
// run 2: -cp x.jar:NE4:b.jar -> x.jar:b.jar -> mismatched
|
|
|
|
int j = header()->app_class_paths_start_index();
|
|
mismatch = check_paths(j, shared_app_paths_len, rp_array, 0, 0);
|
|
if (mismatch) {
|
|
// To facilitate app deployment, we allow the JAR files to be moved *together* to
|
|
// a different location, as long as they are still stored under the same directory
|
|
// structure. E.g., the following is OK.
|
|
// java -Xshare:dump -cp /a/Foo.jar:/a/b/Bar.jar ...
|
|
// java -Xshare:auto -cp /x/y/Foo.jar:/x/y/b/Bar.jar ...
|
|
unsigned int dumptime_prefix_len = header()->common_app_classpath_prefix_size();
|
|
unsigned int runtime_prefix_len = longest_common_app_classpath_prefix_len(shared_app_paths_len, rp_array);
|
|
if (dumptime_prefix_len != 0 || runtime_prefix_len != 0) {
|
|
log_info(class, path)("LCP length for app classpath (dumptime: %u, runtime: %u)",
|
|
dumptime_prefix_len, runtime_prefix_len);
|
|
mismatch = check_paths(j, shared_app_paths_len, rp_array,
|
|
dumptime_prefix_len, runtime_prefix_len);
|
|
}
|
|
if (mismatch) {
|
|
return classpath_failure("[APP classpath mismatch, actual: -Djava.class.path=", appcp);
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void FileMapInfo::log_paths(const char* msg, int start_idx, int end_idx) {
|
|
LogTarget(Info, class, path) lt;
|
|
if (lt.is_enabled()) {
|
|
LogStream ls(lt);
|
|
ls.print("%s", msg);
|
|
const char* prefix = "";
|
|
for (int i = start_idx; i < end_idx; i++) {
|
|
ls.print("%s%s", prefix, shared_path(i)->name());
|
|
prefix = os::path_separator();
|
|
}
|
|
ls.cr();
|
|
}
|
|
}
|
|
|
|
bool FileMapInfo::check_module_paths() {
|
|
const char* rp = Arguments::get_property("jdk.module.path");
|
|
int num_paths = Arguments::num_archives(rp);
|
|
if (num_paths != header()->num_module_paths()) {
|
|
return false;
|
|
}
|
|
ResourceMark rm;
|
|
GrowableArray<const char*>* rp_array = create_path_array(rp);
|
|
return check_paths(header()->app_module_paths_start_index(), num_paths, rp_array, 0, 0);
|
|
}
|
|
|
|
bool FileMapInfo::validate_shared_path_table() {
|
|
assert(UseSharedSpaces, "runtime only");
|
|
|
|
_validating_shared_path_table = true;
|
|
|
|
// Load the shared path table info from the archive header
|
|
_shared_path_table = header()->shared_path_table();
|
|
if (DynamicDumpSharedSpaces) {
|
|
// Only support dynamic dumping with the usage of the default CDS archive
|
|
// or a simple base archive.
|
|
// If the base layer archive contains additional path component besides
|
|
// the runtime image and the -cp, dynamic dumping is disabled.
|
|
//
|
|
// When dynamic archiving is enabled, the _shared_path_table is overwritten
|
|
// to include the application path and stored in the top layer archive.
|
|
assert(shared_path(0)->is_modules_image(), "first shared_path must be the modules image");
|
|
if (header()->app_class_paths_start_index() > 1) {
|
|
DynamicDumpSharedSpaces = false;
|
|
log_warning(cds)(
|
|
"Dynamic archiving is disabled because base layer archive has appended boot classpath");
|
|
}
|
|
if (header()->num_module_paths() > 0) {
|
|
if (!check_module_paths()) {
|
|
DynamicDumpSharedSpaces = false;
|
|
log_warning(cds)(
|
|
"Dynamic archiving is disabled because base layer archive has a different module path");
|
|
}
|
|
}
|
|
}
|
|
|
|
log_paths("Expecting BOOT path=", 0, header()->app_class_paths_start_index());
|
|
log_paths("Expecting -Djava.class.path=", header()->app_class_paths_start_index(), header()->app_module_paths_start_index());
|
|
|
|
int module_paths_start_index = header()->app_module_paths_start_index();
|
|
int shared_app_paths_len = 0;
|
|
|
|
// validate the path entries up to the _max_used_path_index
|
|
for (int i=0; i < header()->max_used_path_index() + 1; i++) {
|
|
if (i < module_paths_start_index) {
|
|
if (shared_path(i)->validate()) {
|
|
// Only count the app class paths not from the "Class-path" attribute of a jar manifest.
|
|
if (!shared_path(i)->from_class_path_attr() && i >= header()->app_class_paths_start_index()) {
|
|
shared_app_paths_len++;
|
|
}
|
|
log_info(class, path)("ok");
|
|
} else {
|
|
if (_dynamic_archive_info != nullptr && _dynamic_archive_info->_is_static) {
|
|
assert(!UseSharedSpaces, "UseSharedSpaces should be disabled");
|
|
}
|
|
return false;
|
|
}
|
|
} else if (i >= module_paths_start_index) {
|
|
if (shared_path(i)->validate(false /* not a class path entry */)) {
|
|
log_info(class, path)("ok");
|
|
} else {
|
|
if (_dynamic_archive_info != nullptr && _dynamic_archive_info->_is_static) {
|
|
assert(!UseSharedSpaces, "UseSharedSpaces should be disabled");
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (header()->max_used_path_index() == 0) {
|
|
// default archive only contains the module image in the bootclasspath
|
|
assert(shared_path(0)->is_modules_image(), "first shared_path must be the modules image");
|
|
} else {
|
|
if (!validate_boot_class_paths() || !validate_app_class_paths(shared_app_paths_len)) {
|
|
const char* mismatch_msg = "shared class paths mismatch";
|
|
const char* hint_msg = log_is_enabled(Info, class, path) ?
|
|
"" : " (hint: enable -Xlog:class+path=info to diagnose the failure)";
|
|
if (RequireSharedSpaces) {
|
|
fail_stop("%s%s", mismatch_msg, hint_msg);
|
|
} else {
|
|
log_warning(cds)("%s%s", mismatch_msg, hint_msg);
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
validate_non_existent_class_paths();
|
|
|
|
_validating_shared_path_table = false;
|
|
|
|
#if INCLUDE_JVMTI
|
|
if (_classpath_entries_for_jvmti != nullptr) {
|
|
os::free(_classpath_entries_for_jvmti);
|
|
}
|
|
size_t sz = sizeof(ClassPathEntry*) * get_number_of_shared_paths();
|
|
_classpath_entries_for_jvmti = (ClassPathEntry**)os::malloc(sz, mtClass);
|
|
memset((void*)_classpath_entries_for_jvmti, 0, sz);
|
|
#endif
|
|
|
|
return true;
|
|
}
|
|
|
|
void FileMapInfo::validate_non_existent_class_paths() {
|
|
// All of the recorded non-existent paths came from the Class-Path: attribute from the JAR
|
|
// files on the app classpath. If any of these are found to exist during runtime,
|
|
// it will change how classes are loading for the app loader. For safety, disable
|
|
// loading of archived platform/app classes (currently there's no way to disable just the
|
|
// app classes).
|
|
|
|
assert(UseSharedSpaces, "runtime only");
|
|
for (int i = header()->app_module_paths_start_index() + header()->num_module_paths();
|
|
i < get_number_of_shared_paths();
|
|
i++) {
|
|
SharedClassPathEntry* ent = shared_path(i);
|
|
if (!ent->check_non_existent()) {
|
|
log_warning(cds)("Archived non-system classes are disabled because the "
|
|
"file %s exists", ent->name());
|
|
header()->set_has_platform_or_app_classes(false);
|
|
}
|
|
}
|
|
}
|
|
|
|
// A utility class for reading/validating the GenericCDSFileMapHeader portion of
|
|
// a CDS archive's header. The file header of all CDS archives with versions from
|
|
// CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION (12) are guaranteed to always start
|
|
// with GenericCDSFileMapHeader. This makes it possible to read important information
|
|
// from a CDS archive created by a different version of HotSpot, so that we can
|
|
// automatically regenerate the archive as necessary (JDK-8261455).
|
|
class FileHeaderHelper {
|
|
int _fd;
|
|
bool _is_valid;
|
|
bool _is_static;
|
|
GenericCDSFileMapHeader* _header;
|
|
const char* _archive_name;
|
|
const char* _base_archive_name;
|
|
|
|
public:
|
|
FileHeaderHelper(const char* archive_name, bool is_static) {
|
|
_fd = -1;
|
|
_is_valid = false;
|
|
_header = nullptr;
|
|
_base_archive_name = nullptr;
|
|
_archive_name = archive_name;
|
|
_is_static = is_static;
|
|
}
|
|
|
|
~FileHeaderHelper() {
|
|
if (_header != nullptr) {
|
|
FREE_C_HEAP_ARRAY(char, _header);
|
|
}
|
|
if (_fd != -1) {
|
|
::close(_fd);
|
|
}
|
|
}
|
|
|
|
bool initialize() {
|
|
assert(_archive_name != nullptr, "Archive name is null");
|
|
_fd = os::open(_archive_name, O_RDONLY | O_BINARY, 0);
|
|
if (_fd < 0) {
|
|
log_info(cds)("Specified shared archive not found (%s)", _archive_name);
|
|
return false;
|
|
}
|
|
return initialize(_fd);
|
|
}
|
|
|
|
// for an already opened file, do not set _fd
|
|
bool initialize(int fd) {
|
|
assert(_archive_name != nullptr, "Archive name is null");
|
|
assert(fd != -1, "Archive must be opened already");
|
|
// First read the generic header so we know the exact size of the actual header.
|
|
GenericCDSFileMapHeader gen_header;
|
|
size_t size = sizeof(GenericCDSFileMapHeader);
|
|
os::lseek(fd, 0, SEEK_SET);
|
|
size_t n = ::read(fd, (void*)&gen_header, (unsigned int)size);
|
|
if (n != size) {
|
|
log_warning(cds)("Unable to read generic CDS file map header from shared archive");
|
|
return false;
|
|
}
|
|
|
|
if (gen_header._magic != CDS_ARCHIVE_MAGIC &&
|
|
gen_header._magic != CDS_DYNAMIC_ARCHIVE_MAGIC) {
|
|
log_warning(cds)("The shared archive file has a bad magic number: %#x", gen_header._magic);
|
|
return false;
|
|
}
|
|
|
|
if (gen_header._version < CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION) {
|
|
log_warning(cds)("Cannot handle shared archive file version 0x%x. Must be at least 0x%x.",
|
|
gen_header._version, CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION);
|
|
return false;
|
|
}
|
|
|
|
if (gen_header._version != CURRENT_CDS_ARCHIVE_VERSION) {
|
|
log_warning(cds)("The shared archive file version 0x%x does not match the required version 0x%x.",
|
|
gen_header._version, CURRENT_CDS_ARCHIVE_VERSION);
|
|
}
|
|
|
|
size_t filelen = os::lseek(fd, 0, SEEK_END);
|
|
if (gen_header._header_size >= filelen) {
|
|
log_warning(cds)("Archive file header larger than archive file");
|
|
return false;
|
|
}
|
|
|
|
// Read the actual header and perform more checks
|
|
size = gen_header._header_size;
|
|
_header = (GenericCDSFileMapHeader*)NEW_C_HEAP_ARRAY(char, size, mtInternal);
|
|
os::lseek(fd, 0, SEEK_SET);
|
|
n = ::read(fd, (void*)_header, (unsigned int)size);
|
|
if (n != size) {
|
|
log_warning(cds)("Unable to read actual CDS file map header from shared archive");
|
|
return false;
|
|
}
|
|
|
|
if (!check_header_crc()) {
|
|
return false;
|
|
}
|
|
|
|
if (!check_and_init_base_archive_name()) {
|
|
return false;
|
|
}
|
|
|
|
// All fields in the GenericCDSFileMapHeader has been validated.
|
|
_is_valid = true;
|
|
return true;
|
|
}
|
|
|
|
GenericCDSFileMapHeader* get_generic_file_header() {
|
|
assert(_header != nullptr && _is_valid, "must be a valid archive file");
|
|
return _header;
|
|
}
|
|
|
|
const char* base_archive_name() {
|
|
assert(_header != nullptr && _is_valid, "must be a valid archive file");
|
|
return _base_archive_name;
|
|
}
|
|
|
|
private:
|
|
bool check_header_crc() const {
|
|
if (VerifySharedSpaces) {
|
|
FileMapHeader* header = (FileMapHeader*)_header;
|
|
int actual_crc = header->compute_crc();
|
|
if (actual_crc != header->crc()) {
|
|
log_info(cds)("_crc expected: %d", header->crc());
|
|
log_info(cds)(" actual: %d", actual_crc);
|
|
log_warning(cds)("Header checksum verification failed.");
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool check_and_init_base_archive_name() {
|
|
unsigned int name_offset = _header->_base_archive_name_offset;
|
|
unsigned int name_size = _header->_base_archive_name_size;
|
|
unsigned int header_size = _header->_header_size;
|
|
|
|
if (name_offset + name_size < name_offset) {
|
|
log_warning(cds)("base_archive_name offset/size overflow: " UINT32_FORMAT "/" UINT32_FORMAT,
|
|
name_offset, name_size);
|
|
return false;
|
|
}
|
|
if (_header->_magic == CDS_ARCHIVE_MAGIC) {
|
|
if (name_offset != 0) {
|
|
log_warning(cds)("static shared archive must have zero _base_archive_name_offset");
|
|
return false;
|
|
}
|
|
if (name_size != 0) {
|
|
log_warning(cds)("static shared archive must have zero _base_archive_name_size");
|
|
return false;
|
|
}
|
|
} else {
|
|
assert(_header->_magic == CDS_DYNAMIC_ARCHIVE_MAGIC, "must be");
|
|
if ((name_size == 0 && name_offset != 0) ||
|
|
(name_size != 0 && name_offset == 0)) {
|
|
// If either is zero, both must be zero. This indicates that we are using the default base archive.
|
|
log_warning(cds)("Invalid base_archive_name offset/size: " UINT32_FORMAT "/" UINT32_FORMAT,
|
|
name_offset, name_size);
|
|
return false;
|
|
}
|
|
if (name_size > 0) {
|
|
if (name_offset + name_size > header_size) {
|
|
log_warning(cds)("Invalid base_archive_name offset/size (out of range): "
|
|
UINT32_FORMAT " + " UINT32_FORMAT " > " UINT32_FORMAT ,
|
|
name_offset, name_size, header_size);
|
|
return false;
|
|
}
|
|
const char* name = ((const char*)_header) + _header->_base_archive_name_offset;
|
|
if (name[name_size - 1] != '\0' || strlen(name) != name_size - 1) {
|
|
log_warning(cds)("Base archive name is damaged");
|
|
return false;
|
|
}
|
|
if (!os::file_exists(name)) {
|
|
log_warning(cds)("Base archive %s does not exist", name);
|
|
return false;
|
|
}
|
|
_base_archive_name = name;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
};
|
|
|
|
// Return value:
|
|
// false:
|
|
// <archive_name> is not a valid archive. *base_archive_name is set to null.
|
|
// true && (*base_archive_name) == nullptr:
|
|
// <archive_name> is a valid static archive.
|
|
// true && (*base_archive_name) != nullptr:
|
|
// <archive_name> is a valid dynamic archive.
|
|
bool FileMapInfo::get_base_archive_name_from_header(const char* archive_name,
|
|
char** base_archive_name) {
|
|
FileHeaderHelper file_helper(archive_name, false);
|
|
*base_archive_name = nullptr;
|
|
|
|
if (!file_helper.initialize()) {
|
|
return false;
|
|
}
|
|
GenericCDSFileMapHeader* header = file_helper.get_generic_file_header();
|
|
if (header->_magic != CDS_DYNAMIC_ARCHIVE_MAGIC) {
|
|
assert(header->_magic == CDS_ARCHIVE_MAGIC, "must be");
|
|
if (AutoCreateSharedArchive) {
|
|
log_warning(cds)("AutoCreateSharedArchive is ignored because %s is a static archive", archive_name);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
const char* base = file_helper.base_archive_name();
|
|
if (base == nullptr) {
|
|
*base_archive_name = Arguments::get_default_shared_archive_path();
|
|
} else {
|
|
*base_archive_name = os::strdup_check_oom(base);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// Read the FileMapInfo information from the file.
|
|
|
|
bool FileMapInfo::init_from_file(int fd) {
|
|
FileHeaderHelper file_helper(_full_path, _is_static);
|
|
if (!file_helper.initialize(fd)) {
|
|
log_warning(cds)("Unable to read the file header.");
|
|
return false;
|
|
}
|
|
GenericCDSFileMapHeader* gen_header = file_helper.get_generic_file_header();
|
|
|
|
if (_is_static) {
|
|
if (gen_header->_magic != CDS_ARCHIVE_MAGIC) {
|
|
log_warning(cds)("Not a base shared archive: %s", _full_path);
|
|
return false;
|
|
}
|
|
} else {
|
|
if (gen_header->_magic != CDS_DYNAMIC_ARCHIVE_MAGIC) {
|
|
log_warning(cds)("Not a top shared archive: %s", _full_path);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
_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) {
|
|
log_warning(cds)("Failed to read file header from the top archive file\n");
|
|
return false;
|
|
}
|
|
|
|
if (header()->version() != CURRENT_CDS_ARCHIVE_VERSION) {
|
|
log_info(cds)("_version expected: 0x%x", CURRENT_CDS_ARCHIVE_VERSION);
|
|
log_info(cds)(" actual: 0x%x", header()->version());
|
|
log_warning(cds)("The shared archive file has the wrong version.");
|
|
return false;
|
|
}
|
|
|
|
int common_path_size = header()->common_app_classpath_prefix_size();
|
|
if (common_path_size < 0) {
|
|
log_warning(cds)("common app classpath prefix len < 0");
|
|
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) {
|
|
log_info(cds)("_header_size: " UINT32_FORMAT, header_size);
|
|
log_info(cds)("common_app_classpath_size: " UINT32_FORMAT, header()->common_app_classpath_prefix_size());
|
|
log_info(cds)("base_archive_name_size: " UINT32_FORMAT, header()->base_archive_name_size());
|
|
log_info(cds)("base_archive_name_offset: " UINT32_FORMAT, header()->base_archive_name_offset());
|
|
log_warning(cds)("The shared archive file has an incorrect header size.");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
const char* actual_ident = header()->jvm_ident();
|
|
|
|
if (actual_ident[JVM_IDENT_MAX-1] != 0) {
|
|
log_warning(cds)("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) {
|
|
log_info(cds)("_jvm_ident expected: %s", expected_ident);
|
|
log_info(cds)(" actual: %s", actual_ident);
|
|
log_warning(cds)("The shared archive file was created by a different"
|
|
" version or build of HotSpot");
|
|
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 <= MetaspaceShared::last_valid_region; i++) {
|
|
FileMapRegion* r = region_at(i);
|
|
if (r->file_offset() > len || len - r->file_offset() < r->used()) {
|
|
log_warning(cds)("The shared archive file has been truncated.");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void FileMapInfo::seek_to_position(size_t pos) {
|
|
if (os::lseek(_fd, (long)pos, SEEK_SET) < 0) {
|
|
fail_stop("Unable to seek to position " SIZE_FORMAT, pos);
|
|
}
|
|
}
|
|
|
|
// Read the FileMapInfo information from the file.
|
|
bool FileMapInfo::open_for_read() {
|
|
if (_file_open) {
|
|
return true;
|
|
}
|
|
log_info(cds)("trying to map %s", _full_path);
|
|
int fd = os::open(_full_path, O_RDONLY | O_BINARY, 0);
|
|
if (fd < 0) {
|
|
if (errno == ENOENT) {
|
|
log_info(cds)("Specified shared archive not found (%s)", _full_path);
|
|
} else {
|
|
log_warning(cds)("Failed to open shared archive file (%s)",
|
|
os::strerror(errno));
|
|
}
|
|
return false;
|
|
} else {
|
|
log_info(cds)("Opened archive %s.", _full_path);
|
|
}
|
|
|
|
_fd = fd;
|
|
_file_open = true;
|
|
return true;
|
|
}
|
|
|
|
// Write the FileMapInfo information to the file.
|
|
|
|
void FileMapInfo::open_for_write() {
|
|
LogMessage(cds) msg;
|
|
if (msg.is_info()) {
|
|
msg.info("Dumping shared data to file: ");
|
|
msg.info(" %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, 0444);
|
|
if (fd < 0) {
|
|
fail_stop("Unable to create shared archive file %s: (%s).", _full_path,
|
|
os::strerror(errno));
|
|
}
|
|
_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, MetaspaceShared::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(), MetaspaceShared::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 == MetaspaceShared::bm);
|
|
_mapping_offset = mapping_offset;
|
|
_used = size;
|
|
_read_only = read_only;
|
|
_allow_exec = allow_exec;
|
|
_crc = crc;
|
|
_mapped_from_file = false;
|
|
_mapped_base = nullptr;
|
|
}
|
|
|
|
void FileMapRegion::init_bitmaps(ArchiveHeapBitmapInfo oopmap, ArchiveHeapBitmapInfo ptrmap) {
|
|
_oopmap_offset = oopmap._bm_region_offset;
|
|
_oopmap_size_in_bits = oopmap._size_in_bits;
|
|
|
|
_ptrmap_offset = ptrmap._bm_region_offset;
|
|
_ptrmap_size_in_bits = ptrmap._size_in_bits;
|
|
}
|
|
|
|
BitMapView FileMapRegion::bitmap_view(bool is_oopmap) {
|
|
char* bitmap_base = FileMapInfo::current_info()->map_bitmap_region();
|
|
bitmap_base += is_oopmap ? _oopmap_offset : _ptrmap_offset;
|
|
size_t size_in_bits = is_oopmap ? _oopmap_size_in_bits : _ptrmap_size_in_bits;
|
|
return BitMapView((BitMap::bm_word_t*)(bitmap_base), size_in_bits);
|
|
}
|
|
|
|
BitMapView FileMapRegion::oopmap_view() {
|
|
return bitmap_view(true);
|
|
}
|
|
|
|
BitMapView FileMapRegion::ptrmap_view() {
|
|
assert(has_ptrmap(), "must be");
|
|
return bitmap_view(false);
|
|
}
|
|
|
|
bool FileMapRegion::check_region_crc() 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(mapped_base() != nullptr, "must be initialized");
|
|
int crc = ClassLoader::crc32(0, mapped_base(), (jint)sz);
|
|
if (crc != this->crc()) {
|
|
log_warning(cds)("Checksum verification failed.");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static const char* region_name(int region_index) {
|
|
static const char* names[] = {
|
|
"rw", "ro", "bm", "ca0", "ca1", "oa0", "oa1"
|
|
};
|
|
const int num_regions = sizeof(names)/sizeof(names[0]);
|
|
assert(0 <= region_index && region_index < num_regions, "sanity");
|
|
|
|
return names[region_index];
|
|
}
|
|
|
|
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: " SIZE_FORMAT_X, _file_offset);
|
|
st->print_cr("- mapping_offset: " SIZE_FORMAT_X, _mapping_offset);
|
|
st->print_cr("- used: " SIZE_FORMAT, _used);
|
|
st->print_cr("- oopmap_offset: " SIZE_FORMAT_X, _oopmap_offset);
|
|
st->print_cr("- oopmap_size_in_bits: " SIZE_FORMAT, _oopmap_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) {
|
|
Arguments::assert_is_dumping_archive();
|
|
|
|
FileMapRegion* r = region_at(region);
|
|
char* requested_base;
|
|
size_t mapping_offset = 0;
|
|
|
|
if (region == MetaspaceShared::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(HeapShared::can_write(), "sanity");
|
|
#if INCLUDE_CDS_JAVA_HEAP
|
|
assert(!DynamicDumpSharedSpaces, "must be");
|
|
requested_base = (char*)ArchiveHeapWriter::heap_region_requested_bottom(region);
|
|
if (UseCompressedOops) {
|
|
mapping_offset = (size_t)((address)requested_base - CompressedOops::base());
|
|
assert((mapping_offset >> CompressedOops::shift()) << CompressedOops::shift() == mapping_offset, "must be");
|
|
} else {
|
|
#if INCLUDE_G1GC
|
|
mapping_offset = requested_base - (char*)G1CollectedHeap::heap()->reserved().start();
|
|
#endif
|
|
}
|
|
#endif // INCLUDE_CDS_JAVA_HEAP
|
|
} else {
|
|
char* requested_SharedBaseAddress = (char*)MetaspaceShared::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) {
|
|
log_info(cds)("Shared file region (%-3s) %d: " SIZE_FORMAT_W(8)
|
|
" bytes, addr " INTPTR_FORMAT " file offset 0x%08" PRIxPTR
|
|
" crc 0x%08x",
|
|
region_name(region), region, size, p2i(requested_base), _file_offset, crc);
|
|
}
|
|
|
|
r->init(region, mapping_offset, size, read_only, allow_exec, crc);
|
|
|
|
if (base != nullptr) {
|
|
write_bytes_aligned(base, size);
|
|
}
|
|
}
|
|
|
|
size_t FileMapInfo::set_bitmaps_offset(GrowableArray<ArchiveHeapBitmapInfo>* bitmaps, size_t curr_size) {
|
|
for (int i = 0; i < bitmaps->length(); i++) {
|
|
bitmaps->at(i)._bm_region_offset = curr_size;
|
|
curr_size += bitmaps->at(i)._size_in_bytes;
|
|
}
|
|
return curr_size;
|
|
}
|
|
|
|
size_t FileMapInfo::write_bitmaps(GrowableArray<ArchiveHeapBitmapInfo>* bitmaps, size_t curr_offset, char* buffer) {
|
|
for (int i = 0; i < bitmaps->length(); i++) {
|
|
memcpy(buffer + curr_offset, bitmaps->at(i)._map, bitmaps->at(i)._size_in_bytes);
|
|
curr_offset += bitmaps->at(i)._size_in_bytes;
|
|
}
|
|
return curr_offset;
|
|
}
|
|
|
|
char* FileMapInfo::write_bitmap_region(const CHeapBitMap* ptrmap,
|
|
GrowableArray<ArchiveHeapBitmapInfo>* closed_bitmaps,
|
|
GrowableArray<ArchiveHeapBitmapInfo>* open_bitmaps,
|
|
size_t &size_in_bytes) {
|
|
size_t size_in_bits = ptrmap->size();
|
|
size_in_bytes = ptrmap->size_in_bytes();
|
|
|
|
if (closed_bitmaps != nullptr && open_bitmaps != nullptr) {
|
|
size_in_bytes = set_bitmaps_offset(closed_bitmaps, size_in_bytes);
|
|
size_in_bytes = set_bitmaps_offset(open_bitmaps, size_in_bytes);
|
|
}
|
|
|
|
char* buffer = NEW_C_HEAP_ARRAY(char, size_in_bytes, mtClassShared);
|
|
ptrmap->write_to((BitMap::bm_word_t*)buffer, ptrmap->size_in_bytes());
|
|
header()->set_ptrmap_size_in_bits(size_in_bits);
|
|
|
|
if (closed_bitmaps != nullptr && open_bitmaps != nullptr) {
|
|
size_t curr_offset = write_bitmaps(closed_bitmaps, ptrmap->size_in_bytes(), buffer);
|
|
write_bitmaps(open_bitmaps, curr_offset, buffer);
|
|
}
|
|
|
|
write_region(MetaspaceShared::bm, (char*)buffer, size_in_bytes, /*read_only=*/true, /*allow_exec=*/false);
|
|
return buffer;
|
|
}
|
|
|
|
// Write out the given archive heap memory regions. GC code combines multiple
|
|
// consecutive archive GC regions into one MemRegion whenever possible and
|
|
// produces the 'regions' array.
|
|
//
|
|
// If the archive heap memory size is smaller than a single dump time GC region
|
|
// size, there is only one MemRegion in the array.
|
|
//
|
|
// If the archive heap memory size is bigger than one dump time GC region size,
|
|
// the 'regions' array may contain more than one consolidated MemRegions. When
|
|
// the first/bottom archive GC region is a partial GC region (with the empty
|
|
// portion at the higher address within the region), one MemRegion is used for
|
|
// the bottom partial archive GC region. The rest of the consecutive archive
|
|
// GC regions are combined into another MemRegion.
|
|
//
|
|
// Here's the mapping from (archive heap GC regions) -> (GrowableArray<MemRegion> *regions).
|
|
// + We have 1 or more archive heap regions: ah0, ah1, ah2 ..... ahn
|
|
// + We have 1 or 2 consolidated heap memory regions: r0 and r1
|
|
//
|
|
// If there's a single archive GC region (ah0), then r0 == ah0, and r1 is empty.
|
|
// Otherwise:
|
|
//
|
|
// "X" represented space that's occupied by heap objects.
|
|
// "_" represented unused spaced in the heap region.
|
|
//
|
|
//
|
|
// |ah0 | ah1 | ah2| ...... | ahn|
|
|
// |XXXXXX|__ |XXXXX|XXXX|XXXXXXXX|XXXX|
|
|
// |<-r0->| |<- r1 ----------------->|
|
|
// ^^^
|
|
// |
|
|
// +-- gap
|
|
size_t FileMapInfo::write_heap_regions(GrowableArray<MemRegion>* regions,
|
|
GrowableArray<ArchiveHeapBitmapInfo>* bitmaps,
|
|
int first_region_id, int max_num_regions) {
|
|
assert(max_num_regions <= 2, "Only support maximum 2 memory regions");
|
|
|
|
int arr_len = regions == nullptr ? 0 : regions->length();
|
|
if (arr_len > max_num_regions) {
|
|
fail_stop("Unable to write archive heap memory regions: "
|
|
"number of memory regions exceeds maximum due to fragmentation. "
|
|
"Please increase java heap size "
|
|
"(current MaxHeapSize is " SIZE_FORMAT ", InitialHeapSize is " SIZE_FORMAT ").",
|
|
MaxHeapSize, InitialHeapSize);
|
|
}
|
|
|
|
size_t total_size = 0;
|
|
for (int i = 0; i < max_num_regions; i++) {
|
|
char* start = nullptr;
|
|
size_t size = 0;
|
|
if (i < arr_len) {
|
|
start = (char*)regions->at(i).start();
|
|
size = regions->at(i).byte_size();
|
|
total_size += size;
|
|
}
|
|
|
|
int region_idx = i + first_region_id;
|
|
write_region(region_idx, start, size, false, false);
|
|
if (size > 0) {
|
|
int oopmap_idx = i * 2;
|
|
int ptrmap_idx = i * 2 + 1;
|
|
region_at(region_idx)->init_bitmaps(bitmaps->at(oopmap_idx),
|
|
bitmaps->at(ptrmap_idx));
|
|
}
|
|
}
|
|
return total_size;
|
|
}
|
|
|
|
// Dump bytes to file -- at the current file position.
|
|
|
|
void FileMapInfo::write_bytes(const void* buffer, size_t nbytes) {
|
|
assert(_file_open, "must be");
|
|
ssize_t n = os::write(_fd, buffer, (unsigned int)nbytes);
|
|
if (n < 0 || (size_t)n != nbytes) {
|
|
// If the shared archive is corrupted, close it and remove it.
|
|
close();
|
|
remove(_full_path);
|
|
fail_stop("Unable to write to shared archive file.");
|
|
}
|
|
_file_offset += nbytes;
|
|
}
|
|
|
|
bool FileMapInfo::is_file_position_aligned() const {
|
|
return _file_offset == align_up(_file_offset,
|
|
MetaspaceShared::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,
|
|
MetaspaceShared::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) {
|
|
fail_stop("Unable to close the shared archive file.");
|
|
}
|
|
_file_open = false;
|
|
_fd = -1;
|
|
}
|
|
}
|
|
|
|
|
|
// JVM/TI RedefineClasses() support:
|
|
// Remap the shared readonly space to shared readwrite, private.
|
|
bool FileMapInfo::remap_shared_readonly_as_readwrite() {
|
|
int idx = MetaspaceShared::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();
|
|
char *base = os::remap_memory(_fd, _full_path, r->file_offset(),
|
|
addr, size, false /* !read_only */,
|
|
r->allow_exec());
|
|
close();
|
|
// These have to be errors because the shared region is now unmapped.
|
|
if (base == nullptr) {
|
|
log_error(cds)("Unable to remap shared readonly space (errno=%d).", errno);
|
|
vm_exit(1);
|
|
}
|
|
if (base != addr) {
|
|
log_error(cds)("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",
|
|
"String1", "String2", "OpenArchive1", "OpenArchive2" };
|
|
|
|
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::is_shared().
|
|
assert(r->mapped_base() == last_region->mapped_end(), "must have no gaps");
|
|
}
|
|
last_region = r;)
|
|
log_info(cds)("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) {
|
|
log_info(cds)("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())) {
|
|
log_error(cds)("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;
|
|
}
|
|
|
|
r->set_mapped_from_file(false);
|
|
r->set_mapped_base(base);
|
|
|
|
if (VerifySharedSpaces && !r->check_region_crc()) {
|
|
return false;
|
|
}
|
|
|
|
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(r->mapped_base() == nullptr, "must be not mapped yet");
|
|
assert(requested_addr != nullptr, "must be specified");
|
|
|
|
r->set_mapped_from_file(false);
|
|
|
|
if (MetaspaceShared::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 (MetaspaceShared::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)) {
|
|
log_info(cds)("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 MetaspaceShared::map_archives().
|
|
char* base = os::map_memory(_fd, _full_path, r->file_offset(),
|
|
requested_addr, size, r->read_only(),
|
|
r->allow_exec(), mtClassShared);
|
|
if (base != requested_addr) {
|
|
log_info(cds)("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;
|
|
}
|
|
r->set_mapped_from_file(true);
|
|
r->set_mapped_base(requested_addr);
|
|
}
|
|
|
|
if (VerifySharedSpaces && !r->check_region_crc()) {
|
|
return MAP_ARCHIVE_OTHER_FAILURE;
|
|
}
|
|
|
|
return MAP_ARCHIVE_SUCCESS;
|
|
}
|
|
|
|
// The return value is the location of the archive relocation bitmap.
|
|
char* FileMapInfo::map_bitmap_region() {
|
|
FileMapRegion* r = region_at(MetaspaceShared::bm);
|
|
if (r->mapped_base() != nullptr) {
|
|
return r->mapped_base();
|
|
}
|
|
bool read_only = true, allow_exec = false;
|
|
char* requested_addr = nullptr; // allow OS to pick any location
|
|
char* bitmap_base = os::map_memory(_fd, _full_path, r->file_offset(),
|
|
requested_addr, r->used_aligned(), read_only, allow_exec, mtClassShared);
|
|
if (bitmap_base == nullptr) {
|
|
log_info(cds)("failed to map relocation bitmap");
|
|
return nullptr;
|
|
}
|
|
|
|
r->set_mapped_base(bitmap_base);
|
|
if (VerifySharedSpaces && !r->check_region_crc()) {
|
|
log_error(cds)("relocation bitmap CRC error");
|
|
if (!os::unmap_memory(bitmap_base, r->used_aligned())) {
|
|
fatal("os::unmap_memory of relocation bitmap failed");
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
r->set_mapped_from_file(true);
|
|
log_info(cds)("Mapped %s region #%d at base " INTPTR_FORMAT " top " INTPTR_FORMAT " (%s)",
|
|
is_static() ? "static " : "dynamic",
|
|
MetaspaceShared::bm, p2i(r->mapped_base()), p2i(r->mapped_end()),
|
|
shared_region_name[MetaspaceShared::bm]);
|
|
return bitmap_base;
|
|
}
|
|
|
|
// 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) {
|
|
log_debug(cds, reloc)("runtime archive relocation start");
|
|
char* bitmap_base = map_bitmap_region();
|
|
|
|
if (bitmap_base == nullptr) {
|
|
return false; // OOM, or CRC check failure
|
|
} else {
|
|
size_t ptrmap_size_in_bits = header()->ptrmap_size_in_bits();
|
|
log_debug(cds, reloc)("mapped relocation bitmap @ " INTPTR_FORMAT " (" SIZE_FORMAT " bits)",
|
|
p2i(bitmap_base), ptrmap_size_in_bits);
|
|
|
|
BitMapView ptrmap((BitMap::bm_word_t*)bitmap_base, ptrmap_size_in_bits);
|
|
|
|
// Patch all pointers in the mapped region that are marked by ptrmap.
|
|
address patch_base = (address)mapped_base();
|
|
address patch_end = (address)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 patcher((address*)patch_base, (address*)patch_end, valid_old_base, valid_old_end,
|
|
valid_new_base, valid_new_end, addr_delta);
|
|
ptrmap.iterate(&patcher);
|
|
|
|
// The MetaspaceShared::bm region will be unmapped in MetaspaceShared::initialize_shared_spaces().
|
|
|
|
log_debug(cds, 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(MetaspaceShared::ro);
|
|
if (r->read_only()) total += r->used();
|
|
}
|
|
if (dynamic_info() != nullptr) {
|
|
FileMapRegion* r = FileMapInfo::dynamic_info()->region_at(MetaspaceShared::ro);
|
|
if (r->read_only()) total += r->used();
|
|
}
|
|
return total;
|
|
}
|
|
|
|
static MemRegion *closed_heap_regions = nullptr;
|
|
static MemRegion *open_heap_regions = nullptr;
|
|
static int num_closed_heap_regions = 0;
|
|
static int num_open_heap_regions = 0;
|
|
|
|
#if INCLUDE_CDS_JAVA_HEAP
|
|
bool FileMapInfo::has_heap_regions() {
|
|
return (region_at(MetaspaceShared::first_closed_heap_region)->used() > 0);
|
|
}
|
|
|
|
// Returns the address range of the archived heap regions computed using the
|
|
// current oop encoding mode. This range may be different than the one seen at
|
|
// dump time due to encoding mode differences. The result is used in determining
|
|
// if/how these regions should be relocated at run time.
|
|
MemRegion FileMapInfo::get_heap_regions_requested_range() {
|
|
address start = (address) max_uintx;
|
|
address end = nullptr;
|
|
|
|
for (int i = MetaspaceShared::first_closed_heap_region;
|
|
i <= MetaspaceShared::last_valid_region;
|
|
i++) {
|
|
FileMapRegion* r = region_at(i);
|
|
size_t size = r->used();
|
|
if (size > 0) {
|
|
address s = heap_region_requested_address(r);
|
|
address e = s + size;
|
|
log_info(cds)("Heap region %s = " INTPTR_FORMAT " - " INTPTR_FORMAT " = " SIZE_FORMAT_W(8) " bytes",
|
|
region_name(i), p2i(s), p2i(e), size);
|
|
if (start > s) {
|
|
start = s;
|
|
}
|
|
if (end < e) {
|
|
end = e;
|
|
}
|
|
}
|
|
}
|
|
assert(end != nullptr, "must have at least one used heap region");
|
|
|
|
start = align_down(start, HeapRegion::GrainBytes);
|
|
end = align_up(end, HeapRegion::GrainBytes);
|
|
|
|
return MemRegion((HeapWord*)start, (HeapWord*)end);
|
|
}
|
|
|
|
void FileMapInfo::map_or_load_heap_regions() {
|
|
bool success = false;
|
|
|
|
if (can_use_heap_regions()) {
|
|
if (ArchiveHeapLoader::can_map()) {
|
|
success = map_heap_regions();
|
|
} else if (ArchiveHeapLoader::can_load()) {
|
|
success = ArchiveHeapLoader::load_heap_regions(this);
|
|
} else {
|
|
if (!UseCompressedOops && !ArchiveHeapLoader::can_map()) {
|
|
// TODO - remove implicit knowledge of G1
|
|
log_info(cds)("Cannot use CDS heap data. UseG1GC is required for -XX:-UseCompressedOops");
|
|
} else {
|
|
log_info(cds)("Cannot use CDS heap data. UseEpsilonGC, UseG1GC, UseSerialGC or UseParallelGC are required.");
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!success) {
|
|
MetaspaceShared::disable_full_module_graph();
|
|
}
|
|
}
|
|
|
|
bool FileMapInfo::can_use_heap_regions() {
|
|
if (!has_heap_regions()) {
|
|
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().
|
|
}
|
|
|
|
log_info(cds)("CDS archive was created with max heap size = " SIZE_FORMAT "M, and the following configuration:",
|
|
max_heap_size()/M);
|
|
log_info(cds)(" narrow_klass_base = " PTR_FORMAT ", narrow_klass_shift = %d",
|
|
p2i(narrow_klass_base()), narrow_klass_shift());
|
|
log_info(cds)(" narrow_oop_mode = %d, narrow_oop_base = " PTR_FORMAT ", narrow_oop_shift = %d",
|
|
narrow_oop_mode(), p2i(narrow_oop_base()), narrow_oop_shift());
|
|
log_info(cds)(" heap range = [" PTR_FORMAT " - " PTR_FORMAT "]",
|
|
p2i(header()->heap_begin()), p2i(header()->heap_end()));
|
|
|
|
log_info(cds)("The current max heap size = " SIZE_FORMAT "M, HeapRegion::GrainBytes = " SIZE_FORMAT,
|
|
MaxHeapSize/M, HeapRegion::GrainBytes);
|
|
log_info(cds)(" narrow_klass_base = " PTR_FORMAT ", narrow_klass_shift = %d",
|
|
p2i(CompressedKlassPointers::base()), CompressedKlassPointers::shift());
|
|
log_info(cds)(" narrow_oop_mode = %d, narrow_oop_base = " PTR_FORMAT ", narrow_oop_shift = %d",
|
|
CompressedOops::mode(), p2i(CompressedOops::base()), CompressedOops::shift());
|
|
log_info(cds)(" 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);
|
|
|
|
if (narrow_klass_base() != CompressedKlassPointers::base() ||
|
|
narrow_klass_shift() != CompressedKlassPointers::shift()) {
|
|
log_info(cds)("CDS heap data cannot be used because the archive was created with an incompatible narrow klass encoding mode.");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// The actual address of this region during dump time.
|
|
address FileMapInfo::heap_region_dumptime_address(FileMapRegion* r) {
|
|
assert(UseSharedSpaces, "runtime only");
|
|
r->assert_is_heap_region();
|
|
assert(is_aligned(r->mapping_offset(), sizeof(HeapWord)), "must be");
|
|
if (UseCompressedOops) {
|
|
return /*dumptime*/ narrow_oop_base() + r->mapping_offset();
|
|
} else {
|
|
return heap_region_requested_address(r);
|
|
}
|
|
}
|
|
|
|
// The address where this region can be mapped into the runtime heap without
|
|
// patching any of the pointers that are embedded in this region.
|
|
address FileMapInfo::heap_region_requested_address(FileMapRegion* r) {
|
|
assert(UseSharedSpaces, "runtime only");
|
|
r->assert_is_heap_region();
|
|
assert(is_aligned(r->mapping_offset(), sizeof(HeapWord)), "must be");
|
|
assert(ArchiveHeapLoader::can_map(), "cannot be used by ArchiveHeapLoader::can_load() mode");
|
|
if (UseCompressedOops) {
|
|
// We can avoid relocation if each region's offset from the runtime CompressedOops::base()
|
|
// is the same as its offset from the CompressedOops::base() during dumptime.
|
|
// Note that CompressedOops::base() may be different between dumptime and runtime.
|
|
//
|
|
// Example:
|
|
// Dumptime base = 0x1000 and shift is 0. We have a region at address 0x2000. There's a
|
|
// narrowOop P stored in this region that points to an object at address 0x2200.
|
|
// P's encoded value is 0x1200.
|
|
//
|
|
// Runtime base = 0x4000 and shift is also 0. If we map this region at 0x5000, then
|
|
// the value P can remain 0x1200. The decoded address = (0x4000 + (0x1200 << 0)) = 0x5200,
|
|
// which is the runtime location of the referenced object.
|
|
return /*runtime*/ CompressedOops::base() + r->mapping_offset();
|
|
} else {
|
|
// We can avoid relocation if each region is mapped into the exact same address
|
|
// where it was at dump time.
|
|
return /*dumptime*/header()->heap_begin() + r->mapping_offset();
|
|
}
|
|
}
|
|
|
|
// The address where this shared heap region is actually mapped at runtime. This function
|
|
// can be called only after we have determined the value for ArchiveHeapLoader::mapped_heap_delta().
|
|
address FileMapInfo::heap_region_mapped_address(FileMapRegion* r) {
|
|
assert(UseSharedSpaces, "runtime only");
|
|
r->assert_is_heap_region();
|
|
assert(ArchiveHeapLoader::can_map(), "cannot be used by ArchiveHeapLoader::can_load() mode");
|
|
return heap_region_requested_address(r) + ArchiveHeapLoader::mapped_heap_delta();
|
|
}
|
|
|
|
//
|
|
// Map the closed and open archive heap objects to the runtime java heap.
|
|
//
|
|
// The shared objects are mapped at (or close to ) the java heap top in
|
|
// closed archive regions. The mapped objects contain no out-going
|
|
// references to any other java heap regions. GC does not write into the
|
|
// mapped closed archive heap region.
|
|
//
|
|
// The open archive heap objects are mapped below the shared objects in
|
|
// the runtime java heap. The mapped open archive heap data only contains
|
|
// references to the shared objects and open archive objects initially.
|
|
// During runtime execution, out-going references to any other java heap
|
|
// regions may be added. GC may mark and update references in the mapped
|
|
// open archive objects.
|
|
void FileMapInfo::map_heap_regions_impl() {
|
|
// G1 -- always map at the very top of the heap to avoid fragmentation.
|
|
assert(UseG1GC, "the following code assumes G1");
|
|
_heap_pointers_need_patching = false;
|
|
|
|
MemRegion heap_range = G1CollectedHeap::heap()->reserved();
|
|
MemRegion archive_range = get_heap_regions_requested_range();
|
|
|
|
address heap_end = (address)heap_range.end();
|
|
address archive_end = (address)archive_range.end();
|
|
|
|
assert(is_aligned(heap_end, HeapRegion::GrainBytes), "must be");
|
|
assert(is_aligned(archive_end, HeapRegion::GrainBytes), "must be");
|
|
|
|
if (UseCompressedOops &&
|
|
(narrow_oop_mode() != CompressedOops::mode() ||
|
|
narrow_oop_shift() != CompressedOops::shift())) {
|
|
log_info(cds)("CDS heap data needs to be relocated because the archive was created with an incompatible oop encoding mode.");
|
|
_heap_pointers_need_patching = true;
|
|
} else if (!heap_range.contains(archive_range)) {
|
|
log_info(cds)("CDS heap data needs to be relocated because");
|
|
log_info(cds)("the desired range " PTR_FORMAT " - " PTR_FORMAT, p2i(archive_range.start()), p2i(archive_range.end()));
|
|
log_info(cds)("is outside of the heap " PTR_FORMAT " - " PTR_FORMAT, p2i(heap_range.start()), p2i(heap_range.end()));
|
|
_heap_pointers_need_patching = true;
|
|
} else {
|
|
assert(heap_end >= archive_end, "must be");
|
|
if (heap_end != archive_end) {
|
|
log_info(cds)("CDS heap data needs to be relocated to the end of the runtime heap to reduce fragmentation");
|
|
_heap_pointers_need_patching = true;
|
|
}
|
|
}
|
|
|
|
ptrdiff_t delta = 0;
|
|
if (_heap_pointers_need_patching) {
|
|
delta = heap_end - archive_end;
|
|
}
|
|
|
|
log_info(cds)("CDS heap data relocation delta = " INTX_FORMAT " bytes", delta);
|
|
|
|
FileMapRegion* r = region_at(MetaspaceShared::first_closed_heap_region);
|
|
address relocated_closed_heap_region_bottom = heap_region_requested_address(r) + delta;
|
|
|
|
if (!is_aligned(relocated_closed_heap_region_bottom, HeapRegion::GrainBytes)) {
|
|
// Align the bottom of the closed archive heap regions at G1 region boundary.
|
|
// This will avoid the situation where the highest open region and the lowest
|
|
// closed region sharing the same G1 region. Otherwise we will fail to map the
|
|
// open regions.
|
|
size_t align = size_t(relocated_closed_heap_region_bottom) % HeapRegion::GrainBytes;
|
|
delta -= align;
|
|
log_info(cds)("CDS heap data needs to be relocated lower by a further " SIZE_FORMAT
|
|
" bytes to " INTX_FORMAT " to be aligned with HeapRegion::GrainBytes",
|
|
align, delta);
|
|
_heap_pointers_need_patching = true;
|
|
}
|
|
|
|
ArchiveHeapLoader::init_mapped_heap_relocation(delta, narrow_oop_shift());
|
|
relocated_closed_heap_region_bottom = heap_region_mapped_address(r);
|
|
|
|
assert(is_aligned(relocated_closed_heap_region_bottom, HeapRegion::GrainBytes),
|
|
"must be");
|
|
|
|
if (_heap_pointers_need_patching) {
|
|
char* bitmap_base = map_bitmap_region();
|
|
if (bitmap_base == nullptr) {
|
|
log_info(cds)("CDS heap cannot be used because bitmap region cannot be mapped");
|
|
_heap_pointers_need_patching = false;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Map the closed heap regions: GC does not write into these regions.
|
|
if (map_heap_regions(MetaspaceShared::first_closed_heap_region,
|
|
MetaspaceShared::max_num_closed_heap_regions,
|
|
/*is_open_archive=*/ false,
|
|
&closed_heap_regions, &num_closed_heap_regions)) {
|
|
ArchiveHeapLoader::set_closed_regions_mapped();
|
|
|
|
// Now, map the open heap regions: GC can write into these regions.
|
|
if (map_heap_regions(MetaspaceShared::first_open_heap_region,
|
|
MetaspaceShared::max_num_open_heap_regions,
|
|
/*is_open_archive=*/ true,
|
|
&open_heap_regions, &num_open_heap_regions)) {
|
|
ArchiveHeapLoader::set_open_regions_mapped();
|
|
}
|
|
}
|
|
}
|
|
|
|
bool FileMapInfo::map_heap_regions() {
|
|
map_heap_regions_impl();
|
|
|
|
if (!ArchiveHeapLoader::closed_regions_mapped()) {
|
|
assert(closed_heap_regions == nullptr &&
|
|
num_closed_heap_regions == 0, "sanity");
|
|
}
|
|
|
|
if (!ArchiveHeapLoader::open_regions_mapped()) {
|
|
assert(open_heap_regions == nullptr && num_open_heap_regions == 0, "sanity");
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool FileMapInfo::map_heap_regions(int first, int max, bool is_open_archive,
|
|
MemRegion** regions_ret, int* num_regions_ret) {
|
|
MemRegion* regions = MemRegion::create_array(max, mtInternal);
|
|
|
|
struct Cleanup {
|
|
MemRegion* _regions;
|
|
uint _length;
|
|
bool _aborted;
|
|
Cleanup(MemRegion* regions, uint length) : _regions(regions), _length(length), _aborted(true) { }
|
|
~Cleanup() { if (_aborted) { MemRegion::destroy_array(_regions, _length); } }
|
|
} cleanup(regions, max);
|
|
|
|
FileMapRegion* r;
|
|
int num_regions = 0;
|
|
|
|
for (int i = first;
|
|
i < first + max; i++) {
|
|
r = region_at(i);
|
|
size_t size = r->used();
|
|
if (size > 0) {
|
|
HeapWord* start = (HeapWord*)heap_region_mapped_address(r);
|
|
regions[num_regions] = MemRegion(start, size / HeapWordSize);
|
|
num_regions ++;
|
|
log_info(cds)("Trying to map heap data: region[%d] at " INTPTR_FORMAT ", size = " SIZE_FORMAT_W(8) " bytes",
|
|
i, p2i(start), size);
|
|
}
|
|
}
|
|
|
|
if (num_regions == 0) {
|
|
return false; // no archived java heap data
|
|
}
|
|
|
|
// Check that regions are within the java heap
|
|
if (!G1CollectedHeap::heap()->check_archive_addresses(regions, num_regions)) {
|
|
log_info(cds)("Unable to allocate region, range is not within java heap.");
|
|
return false;
|
|
}
|
|
|
|
// allocate from java heap
|
|
if (!G1CollectedHeap::heap()->alloc_archive_regions(
|
|
regions, num_regions, is_open_archive)) {
|
|
log_info(cds)("Unable to allocate region, java heap range is already in use.");
|
|
return false;
|
|
}
|
|
|
|
// Map the archived heap data. No need to call MemTracker::record_virtual_memory_type()
|
|
// for mapped regions as they are part of the reserved java heap, which is
|
|
// already recorded.
|
|
for (int i = 0; i < num_regions; i++) {
|
|
r = region_at(first + i);
|
|
char* addr = (char*)regions[i].start();
|
|
char* base = os::map_memory(_fd, _full_path, r->file_offset(),
|
|
addr, regions[i].byte_size(), r->read_only(),
|
|
r->allow_exec());
|
|
if (base == nullptr || base != addr) {
|
|
// dealloc the regions from java heap
|
|
dealloc_heap_regions(regions, num_regions);
|
|
log_info(cds)("Unable to map at required address in java heap. "
|
|
INTPTR_FORMAT ", size = " SIZE_FORMAT " bytes",
|
|
p2i(addr), regions[i].byte_size());
|
|
return false;
|
|
}
|
|
|
|
r->set_mapped_base(base);
|
|
if (VerifySharedSpaces && !r->check_region_crc()) {
|
|
// dealloc the regions from java heap
|
|
dealloc_heap_regions(regions, num_regions);
|
|
log_info(cds)("mapped heap regions are corrupt");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
cleanup._aborted = false;
|
|
// the shared heap data is mapped successfully
|
|
*regions_ret = regions;
|
|
*num_regions_ret = num_regions;
|
|
return true;
|
|
}
|
|
|
|
void FileMapInfo::patch_heap_embedded_pointers() {
|
|
if (!_heap_pointers_need_patching) {
|
|
return;
|
|
}
|
|
|
|
patch_heap_embedded_pointers(closed_heap_regions,
|
|
num_closed_heap_regions,
|
|
MetaspaceShared::first_closed_heap_region);
|
|
|
|
patch_heap_embedded_pointers(open_heap_regions,
|
|
num_open_heap_regions,
|
|
MetaspaceShared::first_open_heap_region);
|
|
}
|
|
|
|
narrowOop FileMapInfo::encoded_heap_region_dumptime_address(FileMapRegion* r) {
|
|
assert(UseSharedSpaces, "runtime only");
|
|
assert(UseCompressedOops, "sanity");
|
|
r->assert_is_heap_region();
|
|
return CompressedOops::narrow_oop_cast(r->mapping_offset() >> narrow_oop_shift());
|
|
}
|
|
|
|
void FileMapInfo::patch_heap_embedded_pointers(MemRegion* regions, int num_regions,
|
|
int first_region_idx) {
|
|
char* bitmap_base = map_bitmap_region();
|
|
assert(bitmap_base != nullptr, "must have already been mapped");
|
|
for (int i=0; i<num_regions; i++) {
|
|
int region_idx = i + first_region_idx;
|
|
FileMapRegion* r = region_at(region_idx);
|
|
|
|
ArchiveHeapLoader::patch_embedded_pointers(
|
|
this, r, regions[i],
|
|
(address)(region_at(MetaspaceShared::bm)->mapped_base()) + r->oopmap_offset(),
|
|
r->oopmap_size_in_bits());
|
|
}
|
|
}
|
|
|
|
// This internally allocates objects using vmClasses::Object_klass(), so it
|
|
// must be called after the Object_klass is loaded
|
|
void FileMapInfo::fixup_mapped_heap_regions() {
|
|
assert(vmClasses::Object_klass_loaded(), "must be");
|
|
// If any closed regions were found, call the fill routine to make them parseable.
|
|
// Note that closed_heap_regions may be non-null even if no regions were found.
|
|
if (num_closed_heap_regions != 0) {
|
|
assert(closed_heap_regions != nullptr,
|
|
"Null closed_heap_regions array with non-zero count");
|
|
G1CollectedHeap::heap()->fill_archive_regions(closed_heap_regions,
|
|
num_closed_heap_regions);
|
|
// G1 marking uses the BOT for object chunking during marking in
|
|
// G1CMObjArrayProcessor::process_slice(); for this reason we need to
|
|
// initialize the BOT for closed archive regions too.
|
|
G1CollectedHeap::heap()->populate_archive_regions_bot_part(closed_heap_regions,
|
|
num_closed_heap_regions);
|
|
}
|
|
|
|
// do the same for mapped open archive heap regions
|
|
if (num_open_heap_regions != 0) {
|
|
assert(open_heap_regions != nullptr, "Null open_heap_regions array with non-zero count");
|
|
G1CollectedHeap::heap()->fill_archive_regions(open_heap_regions,
|
|
num_open_heap_regions);
|
|
|
|
// Populate the open archive regions' G1BlockOffsetTableParts. That ensures
|
|
// fast G1BlockOffsetTablePart::block_start operations for any given address
|
|
// within the open archive regions when trying to find start of an object
|
|
// (e.g. during card table scanning).
|
|
G1CollectedHeap::heap()->populate_archive_regions_bot_part(open_heap_regions,
|
|
num_open_heap_regions);
|
|
}
|
|
}
|
|
|
|
// dealloc the archive regions from java heap
|
|
void FileMapInfo::dealloc_heap_regions(MemRegion* regions, int num) {
|
|
if (num > 0) {
|
|
assert(regions != nullptr, "Null archive regions array with non-zero count");
|
|
G1CollectedHeap::heap()->dealloc_archive_regions(regions, num);
|
|
}
|
|
}
|
|
#endif // INCLUDE_CDS_JAVA_HEAP
|
|
|
|
void FileMapInfo::unmap_regions(int regions[], int num_regions) {
|
|
for (int r = 0; r < num_regions; r++) {
|
|
int idx = regions[r];
|
|
unmap_region(idx);
|
|
}
|
|
}
|
|
|
|
// Unmap a memory region in the address space.
|
|
|
|
void FileMapInfo::unmap_region(int i) {
|
|
assert(!HeapShared::is_heap_region(i), "sanity");
|
|
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()) {
|
|
log_info(cds)("Unmapping region #%d at base " INTPTR_FORMAT " (%s)", i, p2i(mapped_base),
|
|
shared_region_name[i]);
|
|
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) {
|
|
fail_stop("Mark mismatch while restoring from shared file.");
|
|
}
|
|
}
|
|
|
|
void FileMapInfo::metaspace_pointers_do(MetaspaceClosure* it, bool use_copy) {
|
|
if (use_copy) {
|
|
_saved_shared_path_table.metaspace_pointers_do(it);
|
|
} else {
|
|
_shared_path_table.metaspace_pointers_do(it);
|
|
}
|
|
}
|
|
|
|
FileMapInfo* FileMapInfo::_current_info = nullptr;
|
|
FileMapInfo* FileMapInfo::_dynamic_archive_info = nullptr;
|
|
bool FileMapInfo::_heap_pointers_need_patching = false;
|
|
SharedPathTable FileMapInfo::_shared_path_table;
|
|
SharedPathTable FileMapInfo::_saved_shared_path_table;
|
|
Array<u8>* FileMapInfo::_saved_shared_path_table_array = nullptr;
|
|
bool FileMapInfo::_validating_shared_path_table = false;
|
|
bool FileMapInfo::_memory_mapping_failed = false;
|
|
GrowableArray<const char*>* FileMapInfo::_non_existent_class_paths = nullptr;
|
|
|
|
// 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 RW
|
|
// region of the archive, which is not mapped yet.
|
|
bool FileMapInfo::initialize() {
|
|
assert(UseSharedSpaces, "UseSharedSpaces expected.");
|
|
|
|
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.
|
|
log_info(cds)("CDS is disabled because early JVMTI ClassFileLoadHook is in use.");
|
|
return false;
|
|
}
|
|
|
|
if (!Arguments::has_jimage()) {
|
|
log_info(cds)("The shared archive file cannot be used with an exploded module build.");
|
|
return false;
|
|
}
|
|
|
|
if (!open_for_read() || !init_from_file(_fd) || !validate_header()) {
|
|
if (_is_static) {
|
|
log_info(cds)("Initialize static archive failed.");
|
|
return false;
|
|
} else {
|
|
log_info(cds)("Initialize dynamic archive failed.");
|
|
if (AutoCreateSharedArchive) {
|
|
DynamicDumpSharedSpaces = true;
|
|
ArchiveClassesAtExit = Arguments::GetSharedDynamicArchivePath();
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// The 2 core spaces are RW->RO
|
|
FileMapRegion* FileMapInfo::first_core_region() const {
|
|
return region_at(MetaspaceShared::rw);
|
|
}
|
|
|
|
FileMapRegion* FileMapInfo::last_core_region() const {
|
|
return region_at(MetaspaceShared::ro);
|
|
}
|
|
|
|
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() {
|
|
if (_obj_alignment != ObjectAlignmentInBytes) {
|
|
log_info(cds)("The shared archive file's ObjectAlignmentInBytes of %d"
|
|
" does not equal the current ObjectAlignmentInBytes of %d.",
|
|
_obj_alignment, ObjectAlignmentInBytes);
|
|
return false;
|
|
}
|
|
if (_compact_strings != CompactStrings) {
|
|
log_info(cds)("The shared archive file's CompactStrings setting (%s)"
|
|
" does not equal the current CompactStrings setting (%s).",
|
|
_compact_strings ? "enabled" : "disabled",
|
|
CompactStrings ? "enabled" : "disabled");
|
|
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) {
|
|
log_warning(cds)("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
|
|
log_info(cds)("The shared archive file's BytecodeVerificationLocal setting (%s)"
|
|
" does not equal the current BytecodeVerificationLocal setting (%s).",
|
|
_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
|
|
log_info(cds)("The shared archive file was created with less restrictive "
|
|
"verification setting than the current setting.");
|
|
// 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;
|
|
}
|
|
|
|
// Java agents are allowed during run time. Therefore, the following condition is not
|
|
// checked: (!_allow_archiving_with_java_agent && AllowArchivingWithJavaAgent)
|
|
// Note: _allow_archiving_with_java_agent is set in the shared archive during dump time
|
|
// while AllowArchivingWithJavaAgent is set during the current run.
|
|
if (_allow_archiving_with_java_agent && !AllowArchivingWithJavaAgent) {
|
|
log_warning(cds)("The setting of the AllowArchivingWithJavaAgent is different "
|
|
"from the setting in the shared archive.");
|
|
return false;
|
|
}
|
|
|
|
if (_allow_archiving_with_java_agent) {
|
|
log_warning(cds)("This archive was created with AllowArchivingWithJavaAgent. It should be used "
|
|
"for testing purposes only and should not be used in a production environment");
|
|
}
|
|
|
|
log_info(cds)("Archive was created with UseCompressedOops = %d, UseCompressedClassPointers = %d",
|
|
compressed_oops(), compressed_class_pointers());
|
|
if (compressed_oops() != UseCompressedOops || compressed_class_pointers() != UseCompressedClassPointers) {
|
|
log_info(cds)("Unable to use shared archive.\nThe saved state of UseCompressedOops and UseCompressedClassPointers is "
|
|
"different from runtime, CDS will be disabled.");
|
|
return false;
|
|
}
|
|
|
|
if (!_use_optimized_module_handling) {
|
|
MetaspaceShared::disable_optimized_module_handling();
|
|
log_info(cds)("optimized module handling: disabled because archive was created without optimized module handling");
|
|
}
|
|
|
|
if (!_use_full_module_graph) {
|
|
MetaspaceShared::disable_full_module_graph();
|
|
log_info(cds)("full module graph: disabled because 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) {
|
|
SharedClassPathEntry* scpe = shared_path(i);
|
|
assert(scpe->is_jar(), "must be"); // other types of scpe will not produce archived classes
|
|
|
|
const char* path = scpe->name();
|
|
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, false, false);
|
|
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 < (int)get_number_of_shared_paths(), "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());
|
|
ClassFileStream* 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(cds, jvmti)("classfile data for %s [%d: %s] = %d bytes", class_name, path_index,
|
|
cfs->source(), cfs->length());
|
|
return cfs;
|
|
}
|
|
|
|
#endif
|