hotspot/src/share/vm/memory/filemap.cpp
author coleenp
Thu, 18 Jun 2015 00:40:51 +0000
changeset 31364 782625e8fb3c
parent 31360 87d3a62c7e35
parent 31362 8957ccbb5821
child 31375 aa5ecd9a5716
permissions -rw-r--r--
Merge
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/*
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 * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "classfile/classLoader.hpp"
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#include "classfile/sharedClassUtil.hpp"
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#include "classfile/symbolTable.hpp"
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#include "classfile/systemDictionaryShared.hpp"
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#include "classfile/altHashing.hpp"
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#if INCLUDE_ALL_GCS
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#include "gc/g1/g1CollectedHeap.hpp"
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#endif
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#include "memory/filemap.hpp"
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#include "memory/metadataFactory.hpp"
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#include "memory/oopFactory.hpp"
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#include "oops/objArrayOop.hpp"
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#include "prims/jvmtiExport.hpp"
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#include "runtime/arguments.hpp"
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#include "runtime/java.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/defaultStream.hpp"
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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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PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
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extern address JVM_FunctionAtStart();
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extern address JVM_FunctionAtEnd();
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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(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.", NULL);
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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(msg, ap);        // Never returns.
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  va_end(ap);           // for completeness.
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}
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// Complain and continue.  Recoverable errors during the reading of the
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// archive file may continue (with sharing disabled).
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//
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// If we continue, then disable shared spaces and close the file.
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void FileMapInfo::fail_continue(const char *msg, ...) {
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  va_list ap;
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  va_start(ap, msg);
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  MetaspaceShared::set_archive_loading_failed();
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  if (PrintSharedArchiveAndExit && _validating_classpath_entry_table) {
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    // If we are doing PrintSharedArchiveAndExit and some of the classpath entries
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    // do not validate, we can still continue "limping" to validate the remaining
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    // entries. No need to quit.
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    tty->print("[");
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    tty->vprint(msg, ap);
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    tty->print_cr("]");
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  } else {
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    if (RequireSharedSpaces) {
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      fail(msg, ap);
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    } else {
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      if (PrintSharedSpaces) {
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        tty->print_cr("UseSharedSpaces: %s", msg);
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      }
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    }
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    UseSharedSpaces = false;
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    assert(current_info() != NULL, "singleton must be registered");
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    current_info()->close();
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  }
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  va_end(ap);
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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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  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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    unsigned int hash = AltHashing::murmur3_32(8191, (const jbyte*)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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    sprintf(&header_version[JVM_IDENT_MAX-9], "%08x", hash);
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    header_version[JVM_IDENT_MAX-1] = 0;  // Null terminate.
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  }
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}
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FileMapInfo::FileMapInfo() {
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  assert(_current_info == NULL, "must be singleton"); // not thread safe
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  _current_info = this;
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  memset(this, 0, sizeof(FileMapInfo));
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  _file_offset = 0;
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  _file_open = false;
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  _header = SharedClassUtil::allocate_file_map_header();
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  _header->_version = _invalid_version;
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}
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FileMapInfo::~FileMapInfo() {
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  assert(_current_info == this, "must be singleton"); // not thread safe
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  _current_info = NULL;
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}
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void FileMapInfo::populate_header(size_t alignment) {
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  _header->populate(this, alignment);
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}
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size_t FileMapInfo::FileMapHeader::data_size() {
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  return SharedClassUtil::file_map_header_size() - sizeof(FileMapInfo::FileMapHeaderBase);
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}
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void FileMapInfo::FileMapHeader::populate(FileMapInfo* mapinfo, size_t alignment) {
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  _magic = 0xf00baba2;
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  _version = _current_version;
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  _alignment = alignment;
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  _obj_alignment = ObjectAlignmentInBytes;
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  _narrow_oop_mode = Universe::narrow_oop_mode();
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  _narrow_oop_shift = Universe::narrow_oop_shift();
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  _max_heap_size = MaxHeapSize;
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  _narrow_klass_base = Universe::narrow_klass_base();
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  _narrow_klass_shift = Universe::narrow_klass_shift();
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  _classpath_entry_table_size = mapinfo->_classpath_entry_table_size;
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  _classpath_entry_table = mapinfo->_classpath_entry_table;
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  _classpath_entry_size = mapinfo->_classpath_entry_size;
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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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}
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void FileMapInfo::allocate_classpath_entry_table() {
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  int bytes = 0;
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  int count = 0;
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  char* strptr = NULL;
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  char* strptr_max = NULL;
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  Thread* THREAD = Thread::current();
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  ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
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  size_t entry_size = SharedClassUtil::shared_class_path_entry_size();
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  for (int pass=0; pass<2; pass++) {
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    ClassPathEntry *cpe = ClassLoader::classpath_entry(0);
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    for (int cur_entry = 0 ; cpe != NULL; cpe = cpe->next(), cur_entry++) {
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      const char *name = cpe->name();
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      int name_bytes = (int)(strlen(name) + 1);
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      if (pass == 0) {
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        count ++;
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        bytes += (int)entry_size;
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        bytes += name_bytes;
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        if (TraceClassPaths || (TraceClassLoading && Verbose)) {
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          tty->print_cr("[Add main shared path (%s) %s]", (cpe->is_jar_file() ? "jar" : "dir"), name);
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        }
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      } else {
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        SharedClassPathEntry* ent = shared_classpath(cur_entry);
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        if (cpe->is_jar_file()) {
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          struct stat st;
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          if (os::stat(name, &st) != 0) {
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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 jar file %s.", name);
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          }
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          EXCEPTION_MARK; // The following call should never throw, but would exit VM on error.
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          SharedClassUtil::update_shared_classpath(cpe, ent, st.st_mtime, st.st_size, THREAD);
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        } else {
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          struct stat st;
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          if ((os::stat(name, &st) == 0) && ((st.st_mode & S_IFDIR) == S_IFDIR)) {
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            if (!os::dir_is_empty(name)) {
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              ClassLoader::exit_with_path_failure("Cannot have non-empty directory in archived classpaths", name);
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            }
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            ent->_filesize = -1;
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          } else {
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            ent->_filesize = -2;
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          }
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        }
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        ent->_name = strptr;
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        if (strptr + name_bytes <= strptr_max) {
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          strncpy(strptr, name, (size_t)name_bytes); // name_bytes includes trailing 0.
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          strptr += name_bytes;
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        } else {
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          assert(0, "miscalculated buffer size");
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        }
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      }
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    }
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    if (pass == 0) {
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      EXCEPTION_MARK; // The following call should never throw, but would exit VM on error.
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      Array<u8>* arr = MetadataFactory::new_array<u8>(loader_data, (bytes + 7)/8, THREAD);
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      strptr = (char*)(arr->data());
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      strptr_max = strptr + bytes;
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      SharedClassPathEntry* table = (SharedClassPathEntry*)strptr;
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      strptr += entry_size * count;
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      _classpath_entry_table_size = count;
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      _classpath_entry_table = table;
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      _classpath_entry_size = entry_size;
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    }
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  }
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}
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bool FileMapInfo::validate_classpath_entry_table() {
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  _validating_classpath_entry_table = true;
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  int count = _header->_classpath_entry_table_size;
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  _classpath_entry_table = _header->_classpath_entry_table;
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  _classpath_entry_size = _header->_classpath_entry_size;
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  for (int i=0; i<count; i++) {
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    SharedClassPathEntry* ent = shared_classpath(i);
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    struct stat st;
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    const char* name = ent->_name;
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    bool ok = true;
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    if (TraceClassPaths || (TraceClassLoading && Verbose)) {
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      tty->print_cr("[Checking shared classpath entry: %s]", name);
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    }
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    if (os::stat(name, &st) != 0) {
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      fail_continue("Required classpath entry does not exist: %s", name);
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      ok = false;
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    } else if (ent->is_dir()) {
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      if (!os::dir_is_empty(name)) {
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        fail_continue("directory is not empty: %s", name);
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        ok = false;
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      }
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    } else if (ent->is_jar()) {
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      if (ent->_timestamp != st.st_mtime ||
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          ent->_filesize != st.st_size) {
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        ok = false;
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        if (PrintSharedArchiveAndExit) {
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          fail_continue(ent->_timestamp != st.st_mtime ?
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                        "Timestamp mismatch" :
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                        "File size mismatch");
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        } else {
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          fail_continue("A jar file is not the one used while building"
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                        " the shared archive file: %s", name);
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        }
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      }
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    }
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    if (ok) {
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      if (TraceClassPaths || (TraceClassLoading && Verbose)) {
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        tty->print_cr("[ok]");
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      }
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    } else if (!PrintSharedArchiveAndExit) {
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      _validating_classpath_entry_table = false;
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      return false;
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    }
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   310
  }
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   311
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
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  _classpath_entry_table_size = _header->_classpath_entry_table_size;
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   313
  _validating_classpath_entry_table = false;
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   314
  return true;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
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   315
}
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   316
1
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// Read the FileMapInfo information from the file.
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   319
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bool FileMapInfo::init_from_file(int fd) {
26135
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   321
  size_t sz = _header->data_size();
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
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   322
  char* addr = _header->data();
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   323
  size_t n = os::read(fd, addr, (unsigned int)sz);
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   324
  if (n != sz) {
1
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    fail_continue("Unable to read the file header.");
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   326
    return false;
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   327
  }
26135
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   328
  if (_header->_version != current_version()) {
1
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   329
    fail_continue("The shared archive file has the wrong version.");
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   330
    return false;
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   331
  }
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   332
  _file_offset = (long)n;
26135
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parents: 25715
diff changeset
   333
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
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   334
  size_t info_size = _header->_paths_misc_info_size;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
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   335
  _paths_misc_info = NEW_C_HEAP_ARRAY_RETURN_NULL(char, info_size, mtClass);
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
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parents: 25715
diff changeset
   336
  if (_paths_misc_info == NULL) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   337
    fail_continue("Unable to read the file header.");
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
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parents: 25715
diff changeset
   338
    return false;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
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parents: 25715
diff changeset
   339
  }
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
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   340
  n = os::read(fd, _paths_misc_info, (unsigned int)info_size);
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
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parents: 25715
diff changeset
   341
  if (n != info_size) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
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parents: 25715
diff changeset
   342
    fail_continue("Unable to read the shared path info header.");
27880
afb974a04396 8060074: os::free() takes MemoryTrackingLevel but doesn't need it
coleenp
parents: 27025
diff changeset
   343
    FREE_C_HEAP_ARRAY(char, _paths_misc_info);
26135
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   344
    _paths_misc_info = NULL;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
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   345
    return false;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
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diff changeset
   346
  }
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   347
27025
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
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   348
  size_t len = lseek(fd, 0, SEEK_END);
f4805f778f16 8044269: Analysis of archive files.
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parents: 26296
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   349
  struct FileMapInfo::FileMapHeader::space_info* si =
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   350
    &_header->_space[MetaspaceShared::mc];
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parents: 26296
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   351
  if (si->_file_offset >= len || len - si->_file_offset < si->_used) {
f4805f778f16 8044269: Analysis of archive files.
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parents: 26296
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   352
    fail_continue("The shared archive file has been truncated.");
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   353
    return false;
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   354
  }
f4805f778f16 8044269: Analysis of archive files.
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parents: 26296
diff changeset
   355
26135
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parents: 25715
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   356
  _file_offset += (long)n;
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   357
  return true;
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parents:
diff changeset
   358
}
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parents:
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   359
489c9b5090e2 Initial load
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parents:
diff changeset
   360
489c9b5090e2 Initial load
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parents:
diff changeset
   361
// Read the FileMapInfo information from the file.
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parents:
diff changeset
   362
bool FileMapInfo::open_for_read() {
489c9b5090e2 Initial load
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   363
  _full_path = Arguments::GetSharedArchivePath();
489c9b5090e2 Initial load
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parents:
diff changeset
   364
  int fd = open(_full_path, O_RDONLY | O_BINARY, 0);
489c9b5090e2 Initial load
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parents:
diff changeset
   365
  if (fd < 0) {
489c9b5090e2 Initial load
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parents:
diff changeset
   366
    if (errno == ENOENT) {
489c9b5090e2 Initial load
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parents:
diff changeset
   367
      // Not locating the shared archive is ok.
489c9b5090e2 Initial load
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diff changeset
   368
      fail_continue("Specified shared archive not found.");
489c9b5090e2 Initial load
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parents:
diff changeset
   369
    } else {
489c9b5090e2 Initial load
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parents:
diff changeset
   370
      fail_continue("Failed to open shared archive file (%s).",
489c9b5090e2 Initial load
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parents:
diff changeset
   371
                    strerror(errno));
489c9b5090e2 Initial load
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parents:
diff changeset
   372
    }
489c9b5090e2 Initial load
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diff changeset
   373
    return false;
489c9b5090e2 Initial load
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parents:
diff changeset
   374
  }
489c9b5090e2 Initial load
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parents:
diff changeset
   375
489c9b5090e2 Initial load
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parents:
diff changeset
   376
  _fd = fd;
489c9b5090e2 Initial load
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parents:
diff changeset
   377
  _file_open = true;
489c9b5090e2 Initial load
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parents:
diff changeset
   378
  return true;
489c9b5090e2 Initial load
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parents:
diff changeset
   379
}
489c9b5090e2 Initial load
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parents:
diff changeset
   380
489c9b5090e2 Initial load
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parents:
diff changeset
   381
489c9b5090e2 Initial load
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parents:
diff changeset
   382
// Write the FileMapInfo information to the file.
489c9b5090e2 Initial load
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parents:
diff changeset
   383
489c9b5090e2 Initial load
duke
parents:
diff changeset
   384
void FileMapInfo::open_for_write() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
 _full_path = Arguments::GetSharedArchivePath();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   386
  if (PrintSharedSpaces) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   387
    tty->print_cr("Dumping shared data to file: ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   388
    tty->print_cr("   %s", _full_path);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   389
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   390
15461
e3acbfdabafa 7197672: There are issues with shared data on windows
hseigel
parents: 15101
diff changeset
   391
#ifdef _WINDOWS  // On Windows, need WRITE permission to remove the file.
e3acbfdabafa 7197672: There are issues with shared data on windows
hseigel
parents: 15101
diff changeset
   392
  chmod(_full_path, _S_IREAD | _S_IWRITE);
e3acbfdabafa 7197672: There are issues with shared data on windows
hseigel
parents: 15101
diff changeset
   393
#endif
e3acbfdabafa 7197672: There are issues with shared data on windows
hseigel
parents: 15101
diff changeset
   394
e3acbfdabafa 7197672: There are issues with shared data on windows
hseigel
parents: 15101
diff changeset
   395
  // Use remove() to delete the existing file because, on Unix, this will
e3acbfdabafa 7197672: There are issues with shared data on windows
hseigel
parents: 15101
diff changeset
   396
  // allow processes that have it open continued access to the file.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   397
  remove(_full_path);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   398
  int fd = open(_full_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0444);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
  if (fd < 0) {
28950
693ae3d5e1ff 8072694: Need errno info when CDS archive creation fails
hseigel
parents: 28023
diff changeset
   400
    fail_stop("Unable to create shared archive file %s: (%s).", _full_path,
693ae3d5e1ff 8072694: Need errno info when CDS archive creation fails
hseigel
parents: 28023
diff changeset
   401
              strerror(errno));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   402
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   403
  _fd = fd;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   404
  _file_offset = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   405
  _file_open = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   406
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   407
489c9b5090e2 Initial load
duke
parents:
diff changeset
   408
489c9b5090e2 Initial load
duke
parents:
diff changeset
   409
// Write the header to the file, seek to the next allocation boundary.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   410
489c9b5090e2 Initial load
duke
parents:
diff changeset
   411
void FileMapInfo::write_header() {
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   412
  int info_size = ClassLoader::get_shared_paths_misc_info_size();
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   413
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   414
  _header->_paths_misc_info_size = info_size;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   415
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   416
  align_file_position();
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   417
  size_t sz = _header->data_size();
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   418
  char* addr = _header->data();
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   419
  write_bytes(addr, (int)sz); // skip the C++ vtable
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   420
  write_bytes(ClassLoader::get_shared_paths_misc_info(), info_size);
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   421
  align_file_position();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   423
489c9b5090e2 Initial load
duke
parents:
diff changeset
   424
489c9b5090e2 Initial load
duke
parents:
diff changeset
   425
// Dump shared spaces to file.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   426
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   427
void FileMapInfo::write_space(int i, Metaspace* space, bool read_only) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   428
  align_file_position();
17109
90e6c31bbbe4 8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents: 16430
diff changeset
   429
  size_t used = space->used_bytes_slow(Metaspace::NonClassType);
90e6c31bbbe4 8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents: 16430
diff changeset
   430
  size_t capacity = space->capacity_bytes_slow(Metaspace::NonClassType);
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   431
  struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[i];
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   432
  write_region(i, (char*)space->bottom(), used, capacity, read_only, false);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   433
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
489c9b5090e2 Initial load
duke
parents:
diff changeset
   436
// Dump region to file.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   437
489c9b5090e2 Initial load
duke
parents:
diff changeset
   438
void FileMapInfo::write_region(int region, char* base, size_t size,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
                               size_t capacity, bool read_only,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
                               bool allow_exec) {
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   441
  struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[region];
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
  if (_file_open) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
    guarantee(si->_file_offset == _file_offset, "file offset mismatch.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
    if (PrintSharedSpaces) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   446
      tty->print_cr("Shared file region %d: 0x%6x bytes, addr " INTPTR_FORMAT
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   447
                    " file offset 0x%6x", region, size, base, _file_offset);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
    si->_file_offset = _file_offset;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
  }
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   452
  if (MetaspaceShared::is_string_region(region)) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   453
    assert((base - (char*)Universe::narrow_oop_base()) % HeapWordSize == 0, "Sanity");
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   454
    if (base != NULL) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   455
      si->_addr._offset = (intx)oopDesc::encode_heap_oop_not_null((oop)base);
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   456
    } else {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   457
      si->_addr._offset = 0;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   458
    }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   459
  } else {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   460
    si->_addr._base = base;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   461
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
  si->_used = size;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
  si->_capacity = capacity;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
  si->_read_only = read_only;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
  si->_allow_exec = allow_exec;
27025
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   466
  si->_crc = ClassLoader::crc32(0, base, (jint)size);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
  write_bytes_aligned(base, (int)size);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   470
// Write the string space. The string space contains one or multiple GC(G1) regions.
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   471
// When the total string space size is smaller than one GC region of the dump time,
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   472
// only one string region is used for shared strings.
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   473
//
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   474
// If the total string space size is bigger than one GC region, there would be more
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   475
// than one GC regions allocated for shared strings. The first/bottom GC region might
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   476
// be a partial GC region with the empty portion at the higher address within that region.
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   477
// The non-empty portion of the first region is written into the archive as one string
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   478
// region. The rest are consecutive full GC regions if they exist, which can be written
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   479
// out in one chunk as another string region.
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   480
void FileMapInfo::write_string_regions(GrowableArray<MemRegion> *regions) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   481
  for (int i = MetaspaceShared::first_string;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   482
           i < MetaspaceShared::first_string + MetaspaceShared::max_strings; i++) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   483
    char* start = NULL;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   484
    size_t size = 0;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   485
    if (regions->is_nonempty()) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   486
      if (i == MetaspaceShared::first_string) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   487
        MemRegion first = regions->first();
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   488
        start = (char*)first.start();
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   489
        size = first.byte_size();
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   490
      } else {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   491
        int len = regions->length();
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   492
        if (len > 1) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   493
          start = (char*)regions->at(1).start();
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   494
          size = (char*)regions->at(len - 1).end() - start;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   495
        }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   496
      }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   497
    }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   498
    write_region(i, start, size, size, false, false);
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   499
  }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   500
}
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   501
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
// Dump bytes to file -- at the current file position.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
void FileMapInfo::write_bytes(const void* buffer, int nbytes) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
  if (_file_open) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
    int n = ::write(_fd, buffer, nbytes);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
    if (n != nbytes) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
      // It is dangerous to leave the corrupted shared archive file around,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
      // close and remove the file. See bug 6372906.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
      close();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
      remove(_full_path);
26296
fd6180a0e0ab 8055754: filemap.cpp does not compile with clang
sla
parents: 26135
diff changeset
   513
      fail_stop("Unable to write to shared archive file.");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
  _file_offset += nbytes;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
// Align file position to an allocation unit boundary.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
void FileMapInfo::align_file_position() {
27025
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   523
  size_t new_file_offset = align_size_up(_file_offset,
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   524
                                         os::vm_allocation_granularity());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
  if (new_file_offset != _file_offset) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
    _file_offset = new_file_offset;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
    if (_file_open) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
      // Seek one byte back from the target and write a byte to insure
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
      // that the written file is the correct length.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
      _file_offset -= 1;
27025
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   531
      if (lseek(_fd, (long)_file_offset, SEEK_SET) < 0) {
26296
fd6180a0e0ab 8055754: filemap.cpp does not compile with clang
sla
parents: 26135
diff changeset
   532
        fail_stop("Unable to seek.");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
      char zero = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
      write_bytes(&zero, 1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
// Dump bytes to file -- at the current file position.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
void FileMapInfo::write_bytes_aligned(const void* buffer, int nbytes) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
  align_file_position();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
  write_bytes(buffer, nbytes);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
  align_file_position();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
// Close the shared archive file.  This does NOT unmap mapped regions.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
void FileMapInfo::close() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
  if (_file_open) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
    if (::close(_fd) < 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
      fail_stop("Unable to close the shared archive file.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
    _file_open = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
    _fd = -1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
// JVM/TI RedefineClasses() support:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
// Remap the shared readonly space to shared readwrite, private.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
bool FileMapInfo::remap_shared_readonly_as_readwrite() {
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   566
  int idx = 0;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   567
  struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[idx];
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
  if (!si->_read_only) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
    // the space is already readwrite so we are done
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
    return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
  size_t used = si->_used;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
  size_t size = align_size_up(used, os::vm_allocation_granularity());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
  if (!open_for_read()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
  }
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   577
  char *addr = _header->region_addr(idx);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   578
  char *base = os::remap_memory(_fd, _full_path, si->_file_offset,
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   579
                                addr, size, false /* !read_only */,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
                                si->_allow_exec);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
  close();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
  if (base == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
    fail_continue("Unable to remap shared readonly space (errno=%d).", errno);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
  }
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   586
  if (base != addr) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
    fail_continue("Unable to remap shared readonly space at required address.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
  si->_read_only = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
  return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   594
// Map the whole region at once, assumed to be allocated contiguously.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   595
ReservedSpace FileMapInfo::reserve_shared_memory() {
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   596
  struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[0];
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   597
  char* requested_addr = _header->region_addr(0);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   598
19319
0ad35be0733a 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 18483
diff changeset
   599
  size_t size = FileMapInfo::shared_spaces_size();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   600
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   601
  // Reserve the space first, then map otherwise map will go right over some
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   602
  // other reserved memory (like the code cache).
19319
0ad35be0733a 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 18483
diff changeset
   603
  ReservedSpace rs(size, os::vm_allocation_granularity(), false, requested_addr);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   604
  if (!rs.is_reserved()) {
26296
fd6180a0e0ab 8055754: filemap.cpp does not compile with clang
sla
parents: 26135
diff changeset
   605
    fail_continue("Unable to reserve shared space at required address " INTPTR_FORMAT, requested_addr);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   606
    return rs;
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   607
  }
14120
7d298141c258 7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents: 13728
diff changeset
   608
  // the reserved virtual memory is for mapping class data sharing archive
15100
0ae85ac7c8b0 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 14577
diff changeset
   609
  MemTracker::record_virtual_memory_type((address)rs.base(), mtClassShared);
0ae85ac7c8b0 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 14577
diff changeset
   610
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   611
  return rs;
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   612
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
// Memory map a region in the address space.
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   615
static const char* shared_region_name[] = { "ReadOnly", "ReadWrite", "MiscData", "MiscCode",
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   616
                                            "String1", "String2" };
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   617
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   618
char* FileMapInfo::map_region(int i) {
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   619
  assert(!MetaspaceShared::is_string_region(i), "sanity");
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   620
  struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[i];
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
  size_t used = si->_used;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   622
  size_t alignment = os::vm_allocation_granularity();
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   623
  size_t size = align_size_up(used, alignment);
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   624
  char *requested_addr = _header->region_addr(i);
31332
dc17890f352d 8054386: Allow Java debugging when CDS is enabled
cjplummer
parents: 28950
diff changeset
   625
  bool read_only;
dc17890f352d 8054386: Allow Java debugging when CDS is enabled
cjplummer
parents: 28950
diff changeset
   626
dc17890f352d 8054386: Allow Java debugging when CDS is enabled
cjplummer
parents: 28950
diff changeset
   627
  // If a tool agent is in use (debugging enabled), we must map the address space RW
dc17890f352d 8054386: Allow Java debugging when CDS is enabled
cjplummer
parents: 28950
diff changeset
   628
  if (JvmtiExport::can_modify_any_class() || JvmtiExport::can_walk_any_space()) {
dc17890f352d 8054386: Allow Java debugging when CDS is enabled
cjplummer
parents: 28950
diff changeset
   629
    read_only = false;
dc17890f352d 8054386: Allow Java debugging when CDS is enabled
cjplummer
parents: 28950
diff changeset
   630
  } else {
dc17890f352d 8054386: Allow Java debugging when CDS is enabled
cjplummer
parents: 28950
diff changeset
   631
    read_only = si->_read_only;
dc17890f352d 8054386: Allow Java debugging when CDS is enabled
cjplummer
parents: 28950
diff changeset
   632
  }
dc17890f352d 8054386: Allow Java debugging when CDS is enabled
cjplummer
parents: 28950
diff changeset
   633
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   634
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   635
  // map the contents of the CDS archive in this memory
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
  char *base = os::map_memory(_fd, _full_path, si->_file_offset,
31332
dc17890f352d 8054386: Allow Java debugging when CDS is enabled
cjplummer
parents: 28950
diff changeset
   637
                              requested_addr, size, read_only,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   638
                              si->_allow_exec);
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   639
  if (base == NULL || base != requested_addr) {
26296
fd6180a0e0ab 8055754: filemap.cpp does not compile with clang
sla
parents: 26135
diff changeset
   640
    fail_continue("Unable to map %s shared space at required address.", shared_region_name[i]);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
    return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
  }
15100
0ae85ac7c8b0 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 14577
diff changeset
   643
#ifdef _WINDOWS
0ae85ac7c8b0 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 14577
diff changeset
   644
  // This call is Windows-only because the memory_type gets recorded for the other platforms
0ae85ac7c8b0 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 14577
diff changeset
   645
  // in method FileMapInfo::reserve_shared_memory(), which is not called on Windows.
0ae85ac7c8b0 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 14577
diff changeset
   646
  MemTracker::record_virtual_memory_type((address)base, mtClassShared);
0ae85ac7c8b0 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 14577
diff changeset
   647
#endif
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   648
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   649
  return base;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   650
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   651
31360
87d3a62c7e35 8098815: Assertion failure in CDS shared string archive support on Windows
iklam
parents: 31345
diff changeset
   652
static MemRegion *string_ranges = NULL;
87d3a62c7e35 8098815: Assertion failure in CDS shared string archive support on Windows
iklam
parents: 31345
diff changeset
   653
static int num_ranges = 0;
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   654
bool FileMapInfo::map_string_regions() {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   655
#if INCLUDE_ALL_GCS
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   656
  if (UseG1GC && UseCompressedOops && UseCompressedClassPointers) {
31362
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   657
    // Check that all the narrow oop and klass encodings match the archive
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   658
    if (narrow_oop_mode() != Universe::narrow_oop_mode() ||
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   659
        narrow_oop_shift() != Universe::narrow_oop_shift() ||
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   660
        narrow_klass_base() != Universe::narrow_klass_base() ||
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   661
        narrow_klass_shift() != Universe::narrow_klass_shift()) {
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   662
      if (PrintSharedSpaces && _header->_space[MetaspaceShared::first_string]._used > 0) {
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   663
        tty->print_cr("Shared string data from the CDS archive is being ignored. "
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   664
                     "The current CompressedOops/CompressedClassPointers encoding differs from "
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   665
                     "that archived due to heap size change. The archive was dumped using max heap "
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   666
                     "size %dM.", max_heap_size()/M);
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   667
      }
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   668
    } else {
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   669
      string_ranges = new MemRegion[MetaspaceShared::max_strings];
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   670
      struct FileMapInfo::FileMapHeader::space_info* si;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   671
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   672
      for (int i = MetaspaceShared::first_string;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   673
               i < MetaspaceShared::first_string + MetaspaceShared::max_strings; i++) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   674
        si = &_header->_space[i];
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   675
        size_t used = si->_used;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   676
        if (used > 0) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   677
          size_t size = used;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   678
          char* requested_addr = (char*)((void*)oopDesc::decode_heap_oop_not_null(
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   679
                                                 (narrowOop)si->_addr._offset));
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   680
          string_ranges[num_ranges] = MemRegion((HeapWord*)requested_addr, size / HeapWordSize);
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   681
          num_ranges ++;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   682
        }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   683
      }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   684
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   685
      if (num_ranges == 0) {
31362
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   686
        StringTable::ignore_shared_strings(true);
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   687
        return true; // no shared string data
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   688
      }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   689
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   690
      // Check that ranges are within the java heap
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   691
      if (!G1CollectedHeap::heap()->check_archive_addresses(string_ranges, num_ranges)) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   692
        fail_continue("Unable to allocate shared string space: range is not "
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   693
                      "within java heap.");
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   694
        return false;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   695
      }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   696
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   697
      // allocate from java heap
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   698
      if (!G1CollectedHeap::heap()->alloc_archive_regions(string_ranges, num_ranges)) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   699
        fail_continue("Unable to allocate shared string space: range is "
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   700
                      "already in use.");
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   701
        return false;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   702
      }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   703
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   704
      // Map the string data. No need to call MemTracker::record_virtual_memory_type()
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   705
      // for mapped string regions as they are part of the reserved java heap, which
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   706
      // is already recorded.
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   707
      for (int i = 0; i < num_ranges; i++) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   708
        si = &_header->_space[MetaspaceShared::first_string + i];
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   709
        char* addr = (char*)string_ranges[i].start();
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   710
        char* base = os::map_memory(_fd, _full_path, si->_file_offset,
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   711
                                    addr, string_ranges[i].byte_size(), si->_read_only,
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   712
                                    si->_allow_exec);
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   713
        if (base == NULL || base != addr) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   714
          fail_continue("Unable to map shared string space at required address.");
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   715
          return false;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   716
        }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   717
      }
31362
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   718
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   719
      if (!verify_string_regions()) {
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   720
        fail_continue("Shared string regions are corrupt");
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   721
        return false;
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   722
      }
31362
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   723
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   724
      // the shared string data is mapped successfully
8957ccbb5821 8098821: Crash in system dictionary initialization with shared strings
coleenp
parents: 31345
diff changeset
   725
      return true;
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   726
    }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   727
  } else {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   728
    if (PrintSharedSpaces && _header->_space[MetaspaceShared::first_string]._used > 0) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   729
      tty->print_cr("Shared string data from the CDS archive is being ignored. UseG1GC, "
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   730
                    "UseCompressedOops and UseCompressedClassPointers are required.");
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   731
    }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   732
  }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   733
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   734
  // if we get here, the shared string data is not mapped
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   735
  assert(string_ranges == NULL && num_ranges == 0, "sanity");
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   736
  StringTable::ignore_shared_strings(true);
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   737
#endif
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   738
  return true;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   739
}
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   740
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   741
bool FileMapInfo::verify_string_regions() {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   742
  for (int i = MetaspaceShared::first_string;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   743
           i < MetaspaceShared::first_string + MetaspaceShared::max_strings; i++) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   744
    if (!verify_region_checksum(i)) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   745
      return false;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   746
    }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   747
  }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   748
  return true;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   749
}
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   750
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   751
void FileMapInfo::fixup_string_regions() {
31360
87d3a62c7e35 8098815: Assertion failure in CDS shared string archive support on Windows
iklam
parents: 31345
diff changeset
   752
  // If any string regions were found, call the fill routine to make them parseable.
87d3a62c7e35 8098815: Assertion failure in CDS shared string archive support on Windows
iklam
parents: 31345
diff changeset
   753
  // Note that string_ranges may be non-NULL even if no ranges were found.
87d3a62c7e35 8098815: Assertion failure in CDS shared string archive support on Windows
iklam
parents: 31345
diff changeset
   754
  if (num_ranges != 0) {
87d3a62c7e35 8098815: Assertion failure in CDS shared string archive support on Windows
iklam
parents: 31345
diff changeset
   755
    assert(string_ranges != NULL, "Null string_ranges array with non-zero count");
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   756
    G1CollectedHeap::heap()->fill_archive_regions(string_ranges, num_ranges);
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   757
  }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   758
}
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   759
27025
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   760
bool FileMapInfo::verify_region_checksum(int i) {
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   761
  if (!VerifySharedSpaces) {
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   762
    return true;
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   763
  }
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   764
27025
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   765
  size_t sz = _header->_space[i]._used;
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   766
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   767
  if (sz == 0) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   768
    return true; // no data
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   769
  }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   770
  if (MetaspaceShared::is_string_region(i) && StringTable::shared_string_ignored()) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   771
    return true; // shared string data are not mapped
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   772
  }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   773
  const char* buf = _header->region_addr(i);
27025
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   774
  int crc = ClassLoader::crc32(0, buf, (jint)sz);
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   775
  if (crc != _header->_space[i]._crc) {
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   776
    fail_continue("Checksum verification failed.");
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   777
    return false;
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   778
  }
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   779
  return true;
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   780
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   781
489c9b5090e2 Initial load
duke
parents:
diff changeset
   782
// Unmap a memory region in the address space.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   783
489c9b5090e2 Initial load
duke
parents:
diff changeset
   784
void FileMapInfo::unmap_region(int i) {
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   785
  assert(!MetaspaceShared::is_string_region(i), "sanity");
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   786
  struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[i];
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   787
  size_t used = si->_used;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   788
  size_t size = align_size_up(used, os::vm_allocation_granularity());
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   789
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   790
  if (used == 0) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   791
    return;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   792
  }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   793
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   794
  char* addr = _header->region_addr(i);
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   795
  if (!os::unmap_memory(addr, size)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   796
    fail_stop("Unable to unmap shared space.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   797
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   798
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   799
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   800
void FileMapInfo::unmap_string_regions() {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   801
  for (int i = MetaspaceShared::first_string;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   802
           i < MetaspaceShared::first_string + MetaspaceShared::max_strings; i++) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   803
    struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[i];
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   804
    size_t used = si->_used;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   805
    if (used > 0) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   806
      size_t size = align_size_up(used, os::vm_allocation_granularity());
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   807
      char* addr = (char*)((void*)oopDesc::decode_heap_oop_not_null(
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   808
                                             (narrowOop)si->_addr._offset));
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   809
      if (!os::unmap_memory(addr, size)) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   810
        fail_stop("Unable to unmap shared space.");
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   811
      }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   812
    }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   813
  }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   814
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   815
489c9b5090e2 Initial load
duke
parents:
diff changeset
   816
void FileMapInfo::assert_mark(bool check) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   817
  if (!check) {
26296
fd6180a0e0ab 8055754: filemap.cpp does not compile with clang
sla
parents: 26135
diff changeset
   818
    fail_stop("Mark mismatch while restoring from shared file.");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   819
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   820
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   821
489c9b5090e2 Initial load
duke
parents:
diff changeset
   822
489c9b5090e2 Initial load
duke
parents:
diff changeset
   823
FileMapInfo* FileMapInfo::_current_info = NULL;
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   824
SharedClassPathEntry* FileMapInfo::_classpath_entry_table = NULL;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   825
int FileMapInfo::_classpath_entry_table_size = 0;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   826
size_t FileMapInfo::_classpath_entry_size = 0x1234baad;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   827
bool FileMapInfo::_validating_classpath_entry_table = false;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   828
489c9b5090e2 Initial load
duke
parents:
diff changeset
   829
// Open the shared archive file, read and validate the header
489c9b5090e2 Initial load
duke
parents:
diff changeset
   830
// information (version, boot classpath, etc.).  If initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
   831
// fails, shared spaces are disabled and the file is closed. [See
489c9b5090e2 Initial load
duke
parents:
diff changeset
   832
// fail_continue.]
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   833
//
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   834
// Validation of the archive is done in two steps:
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   835
//
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   836
// [1] validate_header() - done here. This checks the header, including _paths_misc_info.
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   837
// [2] validate_classpath_entry_table - this is done later, because the table is in the RW
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   838
//     region of the archive, which is not mapped yet.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   839
bool FileMapInfo::initialize() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   840
  assert(UseSharedSpaces, "UseSharedSpaces expected.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   841
489c9b5090e2 Initial load
duke
parents:
diff changeset
   842
  if (!open_for_read()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   843
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   844
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   845
489c9b5090e2 Initial load
duke
parents:
diff changeset
   846
  init_from_file(_fd);
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   847
  if (!validate_header()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   848
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   849
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   850
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   851
  SharedReadOnlySize =  _header->_space[0]._capacity;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   852
  SharedReadWriteSize = _header->_space[1]._capacity;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   853
  SharedMiscDataSize =  _header->_space[2]._capacity;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   854
  SharedMiscCodeSize =  _header->_space[3]._capacity;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   855
  return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   856
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   857
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   858
char* FileMapInfo::FileMapHeader::region_addr(int idx) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   859
  if (MetaspaceShared::is_string_region(idx)) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   860
    return (char*)((void*)oopDesc::decode_heap_oop_not_null(
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   861
              (narrowOop)_space[idx]._addr._offset));
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   862
  } else {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   863
    return _space[idx]._addr._base;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   864
  }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   865
}
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   866
27025
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   867
int FileMapInfo::FileMapHeader::compute_crc() {
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   868
  char* header = data();
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   869
  // start computing from the field after _crc
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   870
  char* buf = (char*)&_crc + sizeof(int);
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   871
  size_t sz = data_size() - (buf - header);
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   872
  int crc = ClassLoader::crc32(0, buf, (jint)sz);
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   873
  return crc;
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   874
}
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   875
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   876
bool FileMapInfo::FileMapHeader::validate() {
27025
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   877
  if (VerifySharedSpaces && compute_crc() != _crc) {
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   878
    fail_continue("Header checksum verification failed.");
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   879
    return false;
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   880
  }
f4805f778f16 8044269: Analysis of archive files.
jiangli
parents: 26296
diff changeset
   881
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   882
  if (_version != current_version()) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   883
    FileMapInfo::fail_continue("The shared archive file is the wrong version.");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   884
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   885
  }
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   886
  if (_magic != (int)0xf00baba2) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   887
    FileMapInfo::fail_continue("The shared archive file has a bad magic number.");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   888
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   889
  }
14577
fd68d810d86b 6924920: Class Data Sharing limit on the java version string can create failures
hseigel
parents: 14120
diff changeset
   890
  char header_version[JVM_IDENT_MAX];
fd68d810d86b 6924920: Class Data Sharing limit on the java version string can create failures
hseigel
parents: 14120
diff changeset
   891
  get_header_version(header_version);
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   892
  if (strncmp(_jvm_ident, header_version, JVM_IDENT_MAX-1) != 0) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   893
    if (TraceClassPaths) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   894
      tty->print_cr("Expected: %s", header_version);
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   895
      tty->print_cr("Actual:   %s", _jvm_ident);
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   896
    }
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   897
    FileMapInfo::fail_continue("The shared archive file was created by a different"
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   898
                  " version or build of HotSpot");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   899
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   900
  }
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   901
  if (_obj_alignment != ObjectAlignmentInBytes) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   902
    FileMapInfo::fail_continue("The shared archive file's ObjectAlignmentInBytes of %d"
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   903
                  " does not equal the current ObjectAlignmentInBytes of %d.",
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   904
                  _obj_alignment, ObjectAlignmentInBytes);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   905
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   906
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   907
489c9b5090e2 Initial load
duke
parents:
diff changeset
   908
  return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   909
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   910
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   911
bool FileMapInfo::validate_header() {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   912
  bool status = _header->validate();
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   913
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   914
  if (status) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   915
    if (!ClassLoader::check_shared_paths_misc_info(_paths_misc_info, _header->_paths_misc_info_size)) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   916
      if (!PrintSharedArchiveAndExit) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   917
        fail_continue("shared class paths mismatch (hint: enable -XX:+TraceClassPaths to diagnose the failure)");
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   918
        status = false;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   919
      }
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   920
    }
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   921
  }
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   922
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   923
  if (_paths_misc_info != NULL) {
27880
afb974a04396 8060074: os::free() takes MemoryTrackingLevel but doesn't need it
coleenp
parents: 27025
diff changeset
   924
    FREE_C_HEAP_ARRAY(char, _paths_misc_info);
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   925
    _paths_misc_info = NULL;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   926
  }
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   927
  return status;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   928
}
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   929
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   930
// The following method is provided to see whether a given pointer
489c9b5090e2 Initial load
duke
parents:
diff changeset
   931
// falls in the mapped shared space.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   932
// Param:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   933
// p, The given pointer
489c9b5090e2 Initial load
duke
parents:
diff changeset
   934
// Return:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   935
// True if the p is within the mapped shared space, otherwise, false.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   936
bool FileMapInfo::is_in_shared_space(const void* p) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 7405
diff changeset
   937
  for (int i = 0; i < MetaspaceShared::n_regions; i++) {
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   938
    char *base;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   939
    if (MetaspaceShared::is_string_region(i) && _header->_space[i]._used == 0) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   940
      continue;
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   941
    }
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   942
    base = _header->region_addr(i);
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   943
    if (p >= base && p < base + _header->_space[i]._used) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   944
      return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   945
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   946
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   947
489c9b5090e2 Initial load
duke
parents:
diff changeset
   948
  return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   949
}
18483
c021907fa0a7 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 17109
diff changeset
   950
c021907fa0a7 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 17109
diff changeset
   951
void FileMapInfo::print_shared_spaces() {
c021907fa0a7 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 17109
diff changeset
   952
  gclog_or_tty->print_cr("Shared Spaces:");
c021907fa0a7 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 17109
diff changeset
   953
  for (int i = 0; i < MetaspaceShared::n_regions; i++) {
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25715
diff changeset
   954
    struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[i];
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   955
    char *base = _header->region_addr(i);
18483
c021907fa0a7 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 17109
diff changeset
   956
    gclog_or_tty->print("  %s " INTPTR_FORMAT "-" INTPTR_FORMAT,
c021907fa0a7 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 17109
diff changeset
   957
                        shared_region_name[i],
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   958
                        base, base + si->_used);
18483
c021907fa0a7 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 17109
diff changeset
   959
  }
c021907fa0a7 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 17109
diff changeset
   960
}
19319
0ad35be0733a 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 18483
diff changeset
   961
0ad35be0733a 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 18483
diff changeset
   962
// Unmap mapped regions of shared space.
0ad35be0733a 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 18483
diff changeset
   963
void FileMapInfo::stop_sharing_and_unmap(const char* msg) {
0ad35be0733a 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 18483
diff changeset
   964
  FileMapInfo *map_info = FileMapInfo::current_info();
0ad35be0733a 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 18483
diff changeset
   965
  if (map_info) {
26296
fd6180a0e0ab 8055754: filemap.cpp does not compile with clang
sla
parents: 26135
diff changeset
   966
    map_info->fail_continue("%s", msg);
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   967
    for (int i = 0; i < MetaspaceShared::num_non_strings; i++) {
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   968
      char *addr = map_info->_header->region_addr(i);
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   969
      if (addr != NULL && !MetaspaceShared::is_string_region(i)) {
19319
0ad35be0733a 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 18483
diff changeset
   970
        map_info->unmap_region(i);
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   971
        map_info->_header->_space[i]._addr._base = NULL;
19319
0ad35be0733a 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 18483
diff changeset
   972
      }
0ad35be0733a 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 18483
diff changeset
   973
    }
31345
1bba15125d8d 8015086: add interned strings to the shared archive.
jiangli
parents: 31332
diff changeset
   974
    map_info->unmap_string_regions();
19319
0ad35be0733a 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 18483
diff changeset
   975
  } else if (DumpSharedSpaces) {
26296
fd6180a0e0ab 8055754: filemap.cpp does not compile with clang
sla
parents: 26135
diff changeset
   976
    fail_stop("%s", msg);
19319
0ad35be0733a 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 18483
diff changeset
   977
  }
0ad35be0733a 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 18483
diff changeset
   978
}