Mercurial > hg > graal-compiler

annotate src/share/vm/memory/filemap.cpp @ 20527:8cb56c8cb30d

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Merge
author jiangli
date Mon, 15 Sep 2014 16:39:00 -0400
parents 6e0cb14ce59b ca6d25be853b
children 0558eb13dcf3
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1 /*
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2 * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "classfile/classLoader.hpp"
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27 #include "classfile/sharedClassUtil.hpp"
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28 #include "classfile/symbolTable.hpp"
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29 #include "classfile/systemDictionaryShared.hpp"
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30 #include "classfile/altHashing.hpp"
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31 #include "memory/filemap.hpp"
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32 #include "memory/metadataFactory.hpp"
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33 #include "memory/oopFactory.hpp"
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34 #include "oops/objArrayOop.hpp"
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35 #include "runtime/arguments.hpp"
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36 #include "runtime/java.hpp"
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37 #include "runtime/os.hpp"
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38 #include "services/memTracker.hpp"
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39 #include "utilities/defaultStream.hpp"
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40
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41 # include <sys/stat.h>
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42 # include <errno.h>
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43
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44 #ifndef O_BINARY // if defined (Win32) use binary files.
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45 #define O_BINARY 0 // otherwise do nothing.
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46 #endif
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47
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48 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
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49 extern address JVM_FunctionAtStart();
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50 extern address JVM_FunctionAtEnd();
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51
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52 // Complain and stop. All error conditions occurring during the writing of
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53 // an archive file should stop the process. Unrecoverable errors during
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54 // the reading of the archive file should stop the process.
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55
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56 static void fail(const char *msg, va_list ap) {
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57 // This occurs very early during initialization: tty is not initialized.
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58 jio_fprintf(defaultStream::error_stream(),
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59 "An error has occurred while processing the"
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60 " shared archive file.\n");
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61 jio_vfprintf(defaultStream::error_stream(), msg, ap);
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62 jio_fprintf(defaultStream::error_stream(), "\n");
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63 // Do not change the text of the below message because some tests check for it.
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64 vm_exit_during_initialization("Unable to use shared archive.", NULL);
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65 }
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66
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67
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68 void FileMapInfo::fail_stop(const char *msg, ...) {
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69 va_list ap;
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70 va_start(ap, msg);
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71 fail(msg, ap); // Never returns.
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72 va_end(ap); // for completeness.
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73 }
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74
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75
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76 // Complain and continue. Recoverable errors during the reading of the
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77 // archive file may continue (with sharing disabled).
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78 //
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79 // If we continue, then disable shared spaces and close the file.
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80
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81 void FileMapInfo::fail_continue(const char *msg, ...) {
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82 va_list ap;
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83 va_start(ap, msg);
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84 MetaspaceShared::set_archive_loading_failed();
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85 if (PrintSharedArchiveAndExit && _validating_classpath_entry_table) {
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86 // If we are doing PrintSharedArchiveAndExit and some of the classpath entries
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87 // do not validate, we can still continue "limping" to validate the remaining
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88 // entries. No need to quit.
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89 tty->print("[");
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90 tty->vprint(msg, ap);
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91 tty->print_cr("]");
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92 } else {
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93 if (RequireSharedSpaces) {
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94 fail(msg, ap);
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95 } else {
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96 if (PrintSharedSpaces) {
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97 tty->print_cr("UseSharedSpaces: %s", msg);
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98 }
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99 }
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100 }
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101 va_end(ap);
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102 UseSharedSpaces = false;
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103 assert(current_info() != NULL, "singleton must be registered");
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104 current_info()->close();
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105 }
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106
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107 // Fill in the fileMapInfo structure with data about this VM instance.
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108
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109 // This method copies the vm version info into header_version. If the version is too
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110 // long then a truncated version, which has a hash code appended to it, is copied.
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111 //
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112 // Using a template enables this method to verify that header_version is an array of
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113 // length JVM_IDENT_MAX. This ensures that the code that writes to the CDS file and
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114 // the code that reads the CDS file will both use the same size buffer. Hence, will
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115 // use identical truncation. This is necessary for matching of truncated versions.
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116 template <int N> static void get_header_version(char (&header_version) [N]) {
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117 assert(N == JVM_IDENT_MAX, "Bad header_version size");
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118
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119 const char *vm_version = VM_Version::internal_vm_info_string();
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120 const int version_len = (int)strlen(vm_version);
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121
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122 if (version_len < (JVM_IDENT_MAX-1)) {
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123 strcpy(header_version, vm_version);
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124
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125 } else {
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126 // Get the hash value. Use a static seed because the hash needs to return the same
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127 // value over multiple jvm invocations.
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128 unsigned int hash = AltHashing::murmur3_32(8191, (const jbyte*)vm_version, version_len);
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129
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130 // Truncate the ident, saving room for the 8 hex character hash value.
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131 strncpy(header_version, vm_version, JVM_IDENT_MAX-9);
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132
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133 // Append the hash code as eight hex digits.
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134 sprintf(&header_version[JVM_IDENT_MAX-9], "%08x", hash);
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135 header_version[JVM_IDENT_MAX-1] = 0; // Null terminate.
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136 }
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137 }
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138
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139 FileMapInfo::FileMapInfo() {
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140 assert(_current_info == NULL, "must be singleton"); // not thread safe
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141 _current_info = this;
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142 memset(this, 0, sizeof(FileMapInfo));
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143 _file_offset = 0;
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144 _file_open = false;
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145 _header = SharedClassUtil::allocate_file_map_header();
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146 _header->_version = _invalid_version;
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147 }
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148
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149 FileMapInfo::~FileMapInfo() {
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150 assert(_current_info == this, "must be singleton"); // not thread safe
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151 _current_info = NULL;
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152 }
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153
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154 void FileMapInfo::populate_header(size_t alignment) {
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155 _header->populate(this, alignment);
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156 }
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157
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158 size_t FileMapInfo::FileMapHeader::data_size() {
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159 return SharedClassUtil::file_map_header_size() - sizeof(FileMapInfo::FileMapHeaderBase);
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160 }
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161
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162 void FileMapInfo::FileMapHeader::populate(FileMapInfo* mapinfo, size_t alignment) {
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163 _magic = 0xf00baba2;
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164 _version = _current_version;
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165 _alignment = alignment;
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166 _obj_alignment = ObjectAlignmentInBytes;
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167 _classpath_entry_table_size = mapinfo->_classpath_entry_table_size;
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168 _classpath_entry_table = mapinfo->_classpath_entry_table;
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169 _classpath_entry_size = mapinfo->_classpath_entry_size;
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170
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171 // The following fields are for sanity checks for whether this archive
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172 // will function correctly with this JVM and the bootclasspath it's
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173 // invoked with.
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174
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175 // JVM version string ... changes on each build.
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176 get_header_version(_jvm_ident);
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177 }
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178
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179 void FileMapInfo::allocate_classpath_entry_table() {
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180 int bytes = 0;
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181 int count = 0;
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182 char* strptr = NULL;
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183 char* strptr_max = NULL;
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184 Thread* THREAD = Thread::current();
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185
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186 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
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187 size_t entry_size = SharedClassUtil::shared_class_path_entry_size();
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188
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189 for (int pass=0; pass<2; pass++) {
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190 ClassPathEntry *cpe = ClassLoader::classpath_entry(0);
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191
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192 for (int cur_entry = 0 ; cpe != NULL; cpe = cpe->next(), cur_entry++) {
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193 const char *name = cpe->name();
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194 int name_bytes = (int)(strlen(name) + 1);
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195
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196 if (pass == 0) {
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197 count ++;
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198 bytes += (int)entry_size;
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199 bytes += name_bytes;
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200 if (TraceClassPaths || (TraceClassLoading && Verbose)) {
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201 tty->print_cr("[Add main shared path (%s) %s]", (cpe->is_jar_file() ? "jar" : "dir"), name);
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202 }
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203 } else {
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204 SharedClassPathEntry* ent = shared_classpath(cur_entry);
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205 if (cpe->is_jar_file()) {
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206 struct stat st;
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207 if (os::stat(name, &st) != 0) {
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208 // The file/dir must exist, or it would not have been added
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209 // into ClassLoader::classpath_entry().
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210 //
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211 // If we can't access a jar file in the boot path, then we can't
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212 // make assumptions about where classes get loaded from.
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213 FileMapInfo::fail_stop("Unable to open jar file %s.", name);
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214 }
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215
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216 EXCEPTION_MARK; // The following call should never throw, but would exit VM on error.
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217 SharedClassUtil::update_shared_classpath(cpe, ent, st.st_mtime, st.st_size, THREAD);
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218 } else {
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219 ent->_filesize = -1;
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220 if (!os::dir_is_empty(name)) {
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221 ClassLoader::exit_with_path_failure("Cannot have non-empty directory in archived classpaths", name);
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222 }
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223 }
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224 ent->_name = strptr;
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225 if (strptr + name_bytes <= strptr_max) {
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226 strncpy(strptr, name, (size_t)name_bytes); // name_bytes includes trailing 0.
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227 strptr += name_bytes;
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228 } else {
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229 assert(0, "miscalculated buffer size");
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230 }
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231 }
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232 }
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233
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234 if (pass == 0) {
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235 EXCEPTION_MARK; // The following call should never throw, but would exit VM on error.
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236 Array<u8>* arr = MetadataFactory::new_array<u8>(loader_data, (bytes + 7)/8, THREAD);
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237 strptr = (char*)(arr->data());
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238 strptr_max = strptr + bytes;
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239 SharedClassPathEntry* table = (SharedClassPathEntry*)strptr;
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240 strptr += entry_size * count;
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241
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242 _classpath_entry_table_size = count;
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243 _classpath_entry_table = table;
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244 _classpath_entry_size = entry_size;
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245 }
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246 }
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247 }
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248
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249 bool FileMapInfo::validate_classpath_entry_table() {
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250 _validating_classpath_entry_table = true;
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251
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252 int count = _header->_classpath_entry_table_size;
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253
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254 _classpath_entry_table = _header->_classpath_entry_table;
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255 _classpath_entry_size = _header->_classpath_entry_size;
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256
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257 for (int i=0; i<count; i++) {
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258 SharedClassPathEntry* ent = shared_classpath(i);
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259 struct stat st;
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260 const char* name = ent->_name;
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261 bool ok = true;
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262 if (TraceClassPaths || (TraceClassLoading && Verbose)) {
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263 tty->print_cr("[Checking shared classpath entry: %s]", name);
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264 }
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265 if (os::stat(name, &st) != 0) {
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266 fail_continue("Required classpath entry does not exist: %s", name);
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267 ok = false;
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268 } else if (ent->is_dir()) {
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269 if (!os::dir_is_empty(name)) {
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270 fail_continue("directory is not empty: %s", name);
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271 ok = false;
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272 }
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273 } else {
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274 if (ent->_timestamp != st.st_mtime ||
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275 ent->_filesize != st.st_size) {
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276 ok = false;
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277 if (PrintSharedArchiveAndExit) {
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278 fail_continue(ent->_timestamp != st.st_mtime ?
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279 "Timestamp mismatch" :
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280 "File size mismatch");
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281 } else {
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282 fail_continue("A jar file is not the one used while building"
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283 " the shared archive file: %s", name);
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284 }
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285 }
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286 }
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diff changeset
287 if (ok) {
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288 if (TraceClassPaths || (TraceClassLoading && Verbose)) {
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289 tty->print_cr("[ok]");
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290 }
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291 } else if (!PrintSharedArchiveAndExit) {
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292 _validating_classpath_entry_table = false;
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diff changeset
293 return false;
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diff changeset
294 }
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diff changeset
295 }
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
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diff changeset
296
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diff changeset
297 _classpath_entry_table_size = _header->_classpath_entry_table_size;
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298 _validating_classpath_entry_table = false;
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diff changeset
299 return true;
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diff changeset
300 }
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
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diff changeset
301
0
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302
a61af66fc99e Initial load
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303 // Read the FileMapInfo information from the file.
a61af66fc99e Initial load
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304
a61af66fc99e Initial load
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305 bool FileMapInfo::init_from_file(int fd) {
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diff changeset
306 size_t sz = _header->data_size();
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diff changeset
307 char* addr = _header->data();
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diff changeset
308 size_t n = os::read(fd, addr, (unsigned int)sz);
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diff changeset
309 if (n != sz) {
0
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310 fail_continue("Unable to read the file header.");
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311 return false;
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diff changeset
312 }
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diff changeset
313 if (_header->_version != current_version()) {
0
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314 fail_continue("The shared archive file has the wrong version.");
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315 return false;
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316 }
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317
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
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diff changeset
318 size_t info_size = _header->_paths_misc_info_size;
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diff changeset
319 _paths_misc_info = NEW_C_HEAP_ARRAY_RETURN_NULL(char, info_size, mtClass);
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diff changeset
320 if (_paths_misc_info == NULL) {
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
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diff changeset
321 fail_continue("Unable to read the file header.");
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322 return false;
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diff changeset
323 }
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
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diff changeset
324 n = os::read(fd, _paths_misc_info, (unsigned int)info_size);
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diff changeset
325 if (n != info_size) {
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
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diff changeset
326 fail_continue("Unable to read the shared path info header.");
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
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diff changeset
327 FREE_C_HEAP_ARRAY(char, _paths_misc_info, mtClass);
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
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diff changeset
328 _paths_misc_info = NULL;
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
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diff changeset
329 return false;
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
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diff changeset
330 }
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
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diff changeset
331
18096
ca6d25be853b 8044269: Analysis of archive files.
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diff changeset
332 size_t len = lseek(fd, 0, SEEK_END);
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
333 struct FileMapInfo::FileMapHeader::space_info* si =
20527
jiangli
parents: 20375 18096
diff changeset
334 &_header->_space[MetaspaceShared::mc];
18096
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
335 if (si->_file_offset >= len || len - si->_file_offset < si->_used) {
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
336 fail_continue("The shared archive file has been truncated.");
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
337 return false;
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
338 }
20527
jiangli
parents: 20375 18096
diff changeset
339
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
340 _file_offset += (long)n;
0
a61af66fc99e Initial load
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parents:
diff changeset
341 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
342 }
a61af66fc99e Initial load
duke
parents:
diff changeset
343
a61af66fc99e Initial load
duke
parents:
diff changeset
344
a61af66fc99e Initial load
duke
parents:
diff changeset
345 // Read the FileMapInfo information from the file.
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parents:
diff changeset
346 bool FileMapInfo::open_for_read() {
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parents:
diff changeset
347 _full_path = Arguments::GetSharedArchivePath();
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parents:
diff changeset
348 int fd = open(_full_path, O_RDONLY | O_BINARY, 0);
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duke
parents:
diff changeset
349 if (fd < 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
350 if (errno == ENOENT) {
a61af66fc99e Initial load
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parents:
diff changeset
351 // Not locating the shared archive is ok.
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parents:
diff changeset
352 fail_continue("Specified shared archive not found.");
a61af66fc99e Initial load
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parents:
diff changeset
353 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
354 fail_continue("Failed to open shared archive file (%s).",
a61af66fc99e Initial load
duke
parents:
diff changeset
355 strerror(errno));
a61af66fc99e Initial load
duke
parents:
diff changeset
356 }
a61af66fc99e Initial load
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parents:
diff changeset
357 return false;
a61af66fc99e Initial load
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parents:
diff changeset
358 }
a61af66fc99e Initial load
duke
parents:
diff changeset
359
a61af66fc99e Initial load
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parents:
diff changeset
360 _fd = fd;
a61af66fc99e Initial load
duke
parents:
diff changeset
361 _file_open = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
362 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
363 }
a61af66fc99e Initial load
duke
parents:
diff changeset
364
a61af66fc99e Initial load
duke
parents:
diff changeset
365
a61af66fc99e Initial load
duke
parents:
diff changeset
366 // Write the FileMapInfo information to the file.
a61af66fc99e Initial load
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parents:
diff changeset
367
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duke
parents:
diff changeset
368 void FileMapInfo::open_for_write() {
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duke
parents:
diff changeset
369 _full_path = Arguments::GetSharedArchivePath();
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duke
parents:
diff changeset
370 if (PrintSharedSpaces) {
a61af66fc99e Initial load
duke
parents:
diff changeset
371 tty->print_cr("Dumping shared data to file: ");
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duke
parents:
diff changeset
372 tty->print_cr(" %s", _full_path);
a61af66fc99e Initial load
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parents:
diff changeset
373 }
a61af66fc99e Initial load
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parents:
diff changeset
374
7980
c4ef3380a70b 7197672: There are issues with shared data on windows
hseigel
parents: 7461
diff changeset
375 #ifdef _WINDOWS // On Windows, need WRITE permission to remove the file.
c4ef3380a70b 7197672: There are issues with shared data on windows
hseigel
parents: 7461
diff changeset
376 chmod(_full_path, _S_IREAD | _S_IWRITE);
c4ef3380a70b 7197672: There are issues with shared data on windows
hseigel
parents: 7461
diff changeset
377 #endif
c4ef3380a70b 7197672: There are issues with shared data on windows
hseigel
parents: 7461
diff changeset
378
c4ef3380a70b 7197672: There are issues with shared data on windows
hseigel
parents: 7461
diff changeset
379 // Use remove() to delete the existing file because, on Unix, this will
c4ef3380a70b 7197672: There are issues with shared data on windows
hseigel
parents: 7461
diff changeset
380 // allow processes that have it open continued access to the file.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
381 remove(_full_path);
a61af66fc99e Initial load
duke
parents:
diff changeset
382 int fd = open(_full_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0444);
a61af66fc99e Initial load
duke
parents:
diff changeset
383 if (fd < 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
384 fail_stop("Unable to create shared archive file %s.", _full_path);
a61af66fc99e Initial load
duke
parents:
diff changeset
385 }
a61af66fc99e Initial load
duke
parents:
diff changeset
386 _fd = fd;
a61af66fc99e Initial load
duke
parents:
diff changeset
387 _file_offset = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
388 _file_open = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
389 }
a61af66fc99e Initial load
duke
parents:
diff changeset
390
a61af66fc99e Initial load
duke
parents:
diff changeset
391
a61af66fc99e Initial load
duke
parents:
diff changeset
392 // Write the header to the file, seek to the next allocation boundary.
a61af66fc99e Initial load
duke
parents:
diff changeset
393
a61af66fc99e Initial load
duke
parents:
diff changeset
394 void FileMapInfo::write_header() {
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
395 int info_size = ClassLoader::get_shared_paths_misc_info_size();
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
396
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
397 _header->_paths_misc_info_size = info_size;
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
398
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
399 align_file_position();
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
400 size_t sz = _header->data_size();
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
401 char* addr = _header->data();
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
402 write_bytes(addr, (int)sz); // skip the C++ vtable
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
403 write_bytes(ClassLoader::get_shared_paths_misc_info(), info_size);
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
404 align_file_position();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
405 }
a61af66fc99e Initial load
duke
parents:
diff changeset
406
a61af66fc99e Initial load
duke
parents:
diff changeset
407
a61af66fc99e Initial load
duke
parents:
diff changeset
408 // Dump shared spaces to file.
a61af66fc99e Initial load
duke
parents:
diff changeset
409
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
410 void FileMapInfo::write_space(int i, Metaspace* space, bool read_only) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
411 align_file_position();
10183
868d87ed63c8 8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents: 8804
diff changeset
412 size_t used = space->used_bytes_slow(Metaspace::NonClassType);
868d87ed63c8 8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents: 8804
diff changeset
413 size_t capacity = space->capacity_bytes_slow(Metaspace::NonClassType);
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
414 struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[i];
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
415 write_region(i, (char*)space->bottom(), used, capacity, read_only, false);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
416 }
a61af66fc99e Initial load
duke
parents:
diff changeset
417
a61af66fc99e Initial load
duke
parents:
diff changeset
418
a61af66fc99e Initial load
duke
parents:
diff changeset
419 // Dump region to file.
a61af66fc99e Initial load
duke
parents:
diff changeset
420
a61af66fc99e Initial load
duke
parents:
diff changeset
421 void FileMapInfo::write_region(int region, char* base, size_t size,
a61af66fc99e Initial load
duke
parents:
diff changeset
422 size_t capacity, bool read_only,
a61af66fc99e Initial load
duke
parents:
diff changeset
423 bool allow_exec) {
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
424 struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[region];
0
a61af66fc99e Initial load
duke
parents:
diff changeset
425
a61af66fc99e Initial load
duke
parents:
diff changeset
426 if (_file_open) {
a61af66fc99e Initial load
duke
parents:
diff changeset
427 guarantee(si->_file_offset == _file_offset, "file offset mismatch.");
a61af66fc99e Initial load
duke
parents:
diff changeset
428 if (PrintSharedSpaces) {
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
429 tty->print_cr("Shared file region %d: 0x%6x bytes, addr " INTPTR_FORMAT
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
430 " file offset 0x%6x", region, size, base, _file_offset);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
431 }
a61af66fc99e Initial load
duke
parents:
diff changeset
432 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
433 si->_file_offset = _file_offset;
a61af66fc99e Initial load
duke
parents:
diff changeset
434 }
a61af66fc99e Initial load
duke
parents:
diff changeset
435 si->_base = base;
a61af66fc99e Initial load
duke
parents:
diff changeset
436 si->_used = size;
a61af66fc99e Initial load
duke
parents:
diff changeset
437 si->_capacity = capacity;
a61af66fc99e Initial load
duke
parents:
diff changeset
438 si->_read_only = read_only;
a61af66fc99e Initial load
duke
parents:
diff changeset
439 si->_allow_exec = allow_exec;
18096
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
440 si->_crc = ClassLoader::crc32(0, base, (jint)size);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
441 write_bytes_aligned(base, (int)size);
a61af66fc99e Initial load
duke
parents:
diff changeset
442 }
a61af66fc99e Initial load
duke
parents:
diff changeset
443
a61af66fc99e Initial load
duke
parents:
diff changeset
444
a61af66fc99e Initial load
duke
parents:
diff changeset
445 // Dump bytes to file -- at the current file position.
a61af66fc99e Initial load
duke
parents:
diff changeset
446
a61af66fc99e Initial load
duke
parents:
diff changeset
447 void FileMapInfo::write_bytes(const void* buffer, int nbytes) {
a61af66fc99e Initial load
duke
parents:
diff changeset
448 if (_file_open) {
a61af66fc99e Initial load
duke
parents:
diff changeset
449 int n = ::write(_fd, buffer, nbytes);
a61af66fc99e Initial load
duke
parents:
diff changeset
450 if (n != nbytes) {
a61af66fc99e Initial load
duke
parents:
diff changeset
451 // It is dangerous to leave the corrupted shared archive file around,
a61af66fc99e Initial load
duke
parents:
diff changeset
452 // close and remove the file. See bug 6372906.
a61af66fc99e Initial load
duke
parents:
diff changeset
453 close();
a61af66fc99e Initial load
duke
parents:
diff changeset
454 remove(_full_path);
a61af66fc99e Initial load
duke
parents:
diff changeset
455 fail_stop("Unable to write to shared archive file.", NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
456 }
a61af66fc99e Initial load
duke
parents:
diff changeset
457 }
a61af66fc99e Initial load
duke
parents:
diff changeset
458 _file_offset += nbytes;
a61af66fc99e Initial load
duke
parents:
diff changeset
459 }
a61af66fc99e Initial load
duke
parents:
diff changeset
460
a61af66fc99e Initial load
duke
parents:
diff changeset
461
a61af66fc99e Initial load
duke
parents:
diff changeset
462 // Align file position to an allocation unit boundary.
a61af66fc99e Initial load
duke
parents:
diff changeset
463
a61af66fc99e Initial load
duke
parents:
diff changeset
464 void FileMapInfo::align_file_position() {
18096
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
465 size_t new_file_offset = align_size_up(_file_offset,
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
466 os::vm_allocation_granularity());
0
a61af66fc99e Initial load
duke
parents:
diff changeset
467 if (new_file_offset != _file_offset) {
a61af66fc99e Initial load
duke
parents:
diff changeset
468 _file_offset = new_file_offset;
a61af66fc99e Initial load
duke
parents:
diff changeset
469 if (_file_open) {
a61af66fc99e Initial load
duke
parents:
diff changeset
470 // Seek one byte back from the target and write a byte to insure
a61af66fc99e Initial load
duke
parents:
diff changeset
471 // that the written file is the correct length.
a61af66fc99e Initial load
duke
parents:
diff changeset
472 _file_offset -= 1;
18096
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
473 if (lseek(_fd, (long)_file_offset, SEEK_SET) < 0) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
474 fail_stop("Unable to seek.", NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
475 }
a61af66fc99e Initial load
duke
parents:
diff changeset
476 char zero = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
477 write_bytes(&zero, 1);
a61af66fc99e Initial load
duke
parents:
diff changeset
478 }
a61af66fc99e Initial load
duke
parents:
diff changeset
479 }
a61af66fc99e Initial load
duke
parents:
diff changeset
480 }
a61af66fc99e Initial load
duke
parents:
diff changeset
481
a61af66fc99e Initial load
duke
parents:
diff changeset
482
a61af66fc99e Initial load
duke
parents:
diff changeset
483 // Dump bytes to file -- at the current file position.
a61af66fc99e Initial load
duke
parents:
diff changeset
484
a61af66fc99e Initial load
duke
parents:
diff changeset
485 void FileMapInfo::write_bytes_aligned(const void* buffer, int nbytes) {
a61af66fc99e Initial load
duke
parents:
diff changeset
486 align_file_position();
a61af66fc99e Initial load
duke
parents:
diff changeset
487 write_bytes(buffer, nbytes);
a61af66fc99e Initial load
duke
parents:
diff changeset
488 align_file_position();
a61af66fc99e Initial load
duke
parents:
diff changeset
489 }
a61af66fc99e Initial load
duke
parents:
diff changeset
490
a61af66fc99e Initial load
duke
parents:
diff changeset
491
a61af66fc99e Initial load
duke
parents:
diff changeset
492 // Close the shared archive file. This does NOT unmap mapped regions.
a61af66fc99e Initial load
duke
parents:
diff changeset
493
a61af66fc99e Initial load
duke
parents:
diff changeset
494 void FileMapInfo::close() {
a61af66fc99e Initial load
duke
parents:
diff changeset
495 if (_file_open) {
a61af66fc99e Initial load
duke
parents:
diff changeset
496 if (::close(_fd) < 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
497 fail_stop("Unable to close the shared archive file.");
a61af66fc99e Initial load
duke
parents:
diff changeset
498 }
a61af66fc99e Initial load
duke
parents:
diff changeset
499 _file_open = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
500 _fd = -1;
a61af66fc99e Initial load
duke
parents:
diff changeset
501 }
a61af66fc99e Initial load
duke
parents:
diff changeset
502 }
a61af66fc99e Initial load
duke
parents:
diff changeset
503
a61af66fc99e Initial load
duke
parents:
diff changeset
504
a61af66fc99e Initial load
duke
parents:
diff changeset
505 // JVM/TI RedefineClasses() support:
a61af66fc99e Initial load
duke
parents:
diff changeset
506 // Remap the shared readonly space to shared readwrite, private.
a61af66fc99e Initial load
duke
parents:
diff changeset
507 bool FileMapInfo::remap_shared_readonly_as_readwrite() {
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
508 struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[0];
0
a61af66fc99e Initial load
duke
parents:
diff changeset
509 if (!si->_read_only) {
a61af66fc99e Initial load
duke
parents:
diff changeset
510 // the space is already readwrite so we are done
a61af66fc99e Initial load
duke
parents:
diff changeset
511 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
512 }
a61af66fc99e Initial load
duke
parents:
diff changeset
513 size_t used = si->_used;
a61af66fc99e Initial load
duke
parents:
diff changeset
514 size_t size = align_size_up(used, os::vm_allocation_granularity());
a61af66fc99e Initial load
duke
parents:
diff changeset
515 if (!open_for_read()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
516 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
517 }
a61af66fc99e Initial load
duke
parents:
diff changeset
518 char *base = os::remap_memory(_fd, _full_path, si->_file_offset,
a61af66fc99e Initial load
duke
parents:
diff changeset
519 si->_base, size, false /* !read_only */,
a61af66fc99e Initial load
duke
parents:
diff changeset
520 si->_allow_exec);
a61af66fc99e Initial load
duke
parents:
diff changeset
521 close();
a61af66fc99e Initial load
duke
parents:
diff changeset
522 if (base == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
523 fail_continue("Unable to remap shared readonly space (errno=%d).", errno);
a61af66fc99e Initial load
duke
parents:
diff changeset
524 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
525 }
a61af66fc99e Initial load
duke
parents:
diff changeset
526 if (base != si->_base) {
a61af66fc99e Initial load
duke
parents:
diff changeset
527 fail_continue("Unable to remap shared readonly space at required address.");
a61af66fc99e Initial load
duke
parents:
diff changeset
528 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
529 }
a61af66fc99e Initial load
duke
parents:
diff changeset
530 si->_read_only = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
531 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
532 }
a61af66fc99e Initial load
duke
parents:
diff changeset
533
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
534 // Map the whole region at once, assumed to be allocated contiguously.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
535 ReservedSpace FileMapInfo::reserve_shared_memory() {
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
536 struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[0];
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
537 char* requested_addr = si->_base;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
538
12056
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
539 size_t size = FileMapInfo::shared_spaces_size();
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
540
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
541 // Reserve the space first, then map otherwise map will go right over some
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
542 // other reserved memory (like the code cache).
12056
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
543 ReservedSpace rs(size, os::vm_allocation_granularity(), false, requested_addr);
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
544 if (!rs.is_reserved()) {
8804
91bf0bdae37b 8008217: CDS: Class data sharing limits the malloc heap on Solaris
coleenp
parents: 7980
diff changeset
545 fail_continue(err_msg("Unable to reserve shared space at required address " INTPTR_FORMAT, requested_addr));
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
546 return rs;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
547 }
6882
716c64bda5ba 7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents: 6725
diff changeset
548 // the reserved virtual memory is for mapping class data sharing archive
7460
6c3f47d964f3 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 7174
diff changeset
549 MemTracker::record_virtual_memory_type((address)rs.base(), mtClassShared);
6c3f47d964f3 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 7174
diff changeset
550
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
551 return rs;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
552 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
553
a61af66fc99e Initial load
duke
parents:
diff changeset
554 // Memory map a region in the address space.
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
555 static const char* shared_region_name[] = { "ReadOnly", "ReadWrite", "MiscData", "MiscCode"};
0
a61af66fc99e Initial load
duke
parents:
diff changeset
556
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
557 char* FileMapInfo::map_region(int i) {
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
558 struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[i];
0
a61af66fc99e Initial load
duke
parents:
diff changeset
559 size_t used = si->_used;
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
560 size_t alignment = os::vm_allocation_granularity();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
561 size_t size = align_size_up(used, alignment);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
562 char *requested_addr = si->_base;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
563
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
564 // map the contents of the CDS archive in this memory
0
a61af66fc99e Initial load
duke
parents:
diff changeset
565 char *base = os::map_memory(_fd, _full_path, si->_file_offset,
a61af66fc99e Initial load
duke
parents:
diff changeset
566 requested_addr, size, si->_read_only,
a61af66fc99e Initial load
duke
parents:
diff changeset
567 si->_allow_exec);
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
568 if (base == NULL || base != si->_base) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
569 fail_continue(err_msg("Unable to map %s shared space at required address.", shared_region_name[i]));
0
a61af66fc99e Initial load
duke
parents:
diff changeset
570 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
571 }
7460
6c3f47d964f3 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 7174
diff changeset
572 #ifdef _WINDOWS
6c3f47d964f3 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 7174
diff changeset
573 // This call is Windows-only because the memory_type gets recorded for the other platforms
6c3f47d964f3 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 7174
diff changeset
574 // in method FileMapInfo::reserve_shared_memory(), which is not called on Windows.
6c3f47d964f3 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 7174
diff changeset
575 MemTracker::record_virtual_memory_type((address)base, mtClassShared);
6c3f47d964f3 8003705: CDS failed on Windows: can not map in the CDS.
hseigel
parents: 7174
diff changeset
576 #endif
0
a61af66fc99e Initial load
duke
parents:
diff changeset
577 return base;
a61af66fc99e Initial load
duke
parents:
diff changeset
578 }
a61af66fc99e Initial load
duke
parents:
diff changeset
579
18096
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
580 bool FileMapInfo::verify_region_checksum(int i) {
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
581 if (!VerifySharedSpaces) {
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
582 return true;
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
583 }
20527
jiangli
parents: 20375 18096
diff changeset
584 const char* buf = _header->_space[i]._base;
jiangli
parents: 20375 18096
diff changeset
585 size_t sz = _header->_space[i]._used;
18096
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
586 int crc = ClassLoader::crc32(0, buf, (jint)sz);
20527
jiangli
parents: 20375 18096
diff changeset
587 if (crc != _header->_space[i]._crc) {
18096
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
588 fail_continue("Checksum verification failed.");
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
589 return false;
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
590 }
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
591 return true;
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
592 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
593
a61af66fc99e Initial load
duke
parents:
diff changeset
594 // Unmap a memory region in the address space.
a61af66fc99e Initial load
duke
parents:
diff changeset
595
a61af66fc99e Initial load
duke
parents:
diff changeset
596 void FileMapInfo::unmap_region(int i) {
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
597 struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[i];
0
a61af66fc99e Initial load
duke
parents:
diff changeset
598 size_t used = si->_used;
a61af66fc99e Initial load
duke
parents:
diff changeset
599 size_t size = align_size_up(used, os::vm_allocation_granularity());
a61af66fc99e Initial load
duke
parents:
diff changeset
600 if (!os::unmap_memory(si->_base, size)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
601 fail_stop("Unable to unmap shared space.");
a61af66fc99e Initial load
duke
parents:
diff changeset
602 }
a61af66fc99e Initial load
duke
parents:
diff changeset
603 }
a61af66fc99e Initial load
duke
parents:
diff changeset
604
a61af66fc99e Initial load
duke
parents:
diff changeset
605
a61af66fc99e Initial load
duke
parents:
diff changeset
606 void FileMapInfo::assert_mark(bool check) {
a61af66fc99e Initial load
duke
parents:
diff changeset
607 if (!check) {
a61af66fc99e Initial load
duke
parents:
diff changeset
608 fail_stop("Mark mismatch while restoring from shared file.", NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
609 }
a61af66fc99e Initial load
duke
parents:
diff changeset
610 }
a61af66fc99e Initial load
duke
parents:
diff changeset
611
a61af66fc99e Initial load
duke
parents:
diff changeset
612
a61af66fc99e Initial load
duke
parents:
diff changeset
613 FileMapInfo* FileMapInfo::_current_info = NULL;
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
614 SharedClassPathEntry* FileMapInfo::_classpath_entry_table = NULL;
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
615 int FileMapInfo::_classpath_entry_table_size = 0;
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
616 size_t FileMapInfo::_classpath_entry_size = 0x1234baad;
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
617 bool FileMapInfo::_validating_classpath_entry_table = false;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
618
a61af66fc99e Initial load
duke
parents:
diff changeset
619 // Open the shared archive file, read and validate the header
a61af66fc99e Initial load
duke
parents:
diff changeset
620 // information (version, boot classpath, etc.). If initialization
a61af66fc99e Initial load
duke
parents:
diff changeset
621 // fails, shared spaces are disabled and the file is closed. [See
a61af66fc99e Initial load
duke
parents:
diff changeset
622 // fail_continue.]
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
623 //
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
624 // Validation of the archive is done in two steps:
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
625 //
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
626 // [1] validate_header() - done here. This checks the header, including _paths_misc_info.
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
627 // [2] validate_classpath_entry_table - this is done later, because the table is in the RW
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
628 // region of the archive, which is not mapped yet.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
629 bool FileMapInfo::initialize() {
a61af66fc99e Initial load
duke
parents:
diff changeset
630 assert(UseSharedSpaces, "UseSharedSpaces expected.");
a61af66fc99e Initial load
duke
parents:
diff changeset
631
a61af66fc99e Initial load
duke
parents:
diff changeset
632 if (JvmtiExport::can_modify_any_class() || JvmtiExport::can_walk_any_space()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
633 fail_continue("Tool agent requires sharing to be disabled.");
a61af66fc99e Initial load
duke
parents:
diff changeset
634 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
635 }
a61af66fc99e Initial load
duke
parents:
diff changeset
636
a61af66fc99e Initial load
duke
parents:
diff changeset
637 if (!open_for_read()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
638 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
639 }
a61af66fc99e Initial load
duke
parents:
diff changeset
640
a61af66fc99e Initial load
duke
parents:
diff changeset
641 init_from_file(_fd);
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
642 if (!validate_header()) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
643 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
644 }
a61af66fc99e Initial load
duke
parents:
diff changeset
645
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
646 SharedReadOnlySize = _header->_space[0]._capacity;
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
647 SharedReadWriteSize = _header->_space[1]._capacity;
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
648 SharedMiscDataSize = _header->_space[2]._capacity;
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
649 SharedMiscCodeSize = _header->_space[3]._capacity;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
650 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
651 }
a61af66fc99e Initial load
duke
parents:
diff changeset
652
20527
jiangli
parents: 20375 18096
diff changeset
653 int FileMapInfo::FileMapHeader::compute_crc() {
jiangli
parents: 20375 18096
diff changeset
654 char* header = data();
18096
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
655 // start computing from the field after _crc
20527
jiangli
parents: 20375 18096
diff changeset
656 char* buf = (char*)&_crc + sizeof(int);
jiangli
parents: 20375 18096
diff changeset
657 size_t sz = data_size() - (buf - header);
18096
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
658 int crc = ClassLoader::crc32(0, buf, (jint)sz);
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
659 return crc;
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
660 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
661
20527
jiangli
parents: 20375 18096
diff changeset
662 int FileMapInfo::compute_header_crc() {
jiangli
parents: 20375 18096
diff changeset
663 return _header->compute_crc();
jiangli
parents: 20375 18096
diff changeset
664 }
jiangli
parents: 20375 18096
diff changeset
665
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
666 bool FileMapInfo::FileMapHeader::validate() {
20527
jiangli
parents: 20375 18096
diff changeset
667 if (_magic != (int)0xf00baba2) {
jiangli
parents: 20375 18096
diff changeset
668 FileMapInfo::fail_continue("The shared archive file has a bad magic number.");
jiangli
parents: 20375 18096
diff changeset
669 return false;
jiangli
parents: 20375 18096
diff changeset
670 }
jiangli
parents: 20375 18096
diff changeset
671 if (VerifySharedSpaces && compute_crc() != _crc) {
18096
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
672 fail_continue("Header checksum verification failed.");
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
673 return false;
ca6d25be853b 8044269: Analysis of archive files.
jiangli
parents: 17937
diff changeset
674 }
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
675 if (_version != current_version()) {
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
676 FileMapInfo::fail_continue("The shared archive file is the wrong version.");
20527
jiangli
parents: 20375 18096
diff changeset
677
0
a61af66fc99e Initial load
duke
parents:
diff changeset
678 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
679 }
7174
fe81517cfb77 6924920: Class Data Sharing limit on the java version string can create failures
hseigel
parents: 6882
diff changeset
680 char header_version[JVM_IDENT_MAX];
fe81517cfb77 6924920: Class Data Sharing limit on the java version string can create failures
hseigel
parents: 6882
diff changeset
681 get_header_version(header_version);
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
682 if (strncmp(_jvm_ident, header_version, JVM_IDENT_MAX-1) != 0) {
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
683 if (TraceClassPaths) {
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
684 tty->print_cr("Expected: %s", header_version);
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
685 tty->print_cr("Actual: %s", _jvm_ident);
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
686 }
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
687 FileMapInfo::fail_continue("The shared archive file was created by a different"
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
688 " version or build of HotSpot");
0
a61af66fc99e Initial load
duke
parents:
diff changeset
689 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
690 }
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
691 if (_obj_alignment != ObjectAlignmentInBytes) {
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
692 FileMapInfo::fail_continue("The shared archive file's ObjectAlignmentInBytes of %d"
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
693 " does not equal the current ObjectAlignmentInBytes of %d.",
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
694 _obj_alignment, ObjectAlignmentInBytes);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
695 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
696 }
a61af66fc99e Initial load
duke
parents:
diff changeset
697
a61af66fc99e Initial load
duke
parents:
diff changeset
698 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
699 }
a61af66fc99e Initial load
duke
parents:
diff changeset
700
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
701 bool FileMapInfo::validate_header() {
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
702 bool status = _header->validate();
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
703
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
704 if (status) {
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
705 if (!ClassLoader::check_shared_paths_misc_info(_paths_misc_info, _header->_paths_misc_info_size)) {
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
706 if (!PrintSharedArchiveAndExit) {
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
707 fail_continue("shared class paths mismatch (hint: enable -XX:+TraceClassPaths to diagnose the failure)");
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
708 status = false;
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
709 }
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
710 }
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
711 }
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
712
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
713 if (_paths_misc_info != NULL) {
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
714 FREE_C_HEAP_ARRAY(char, _paths_misc_info, mtClass);
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
715 _paths_misc_info = NULL;
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
716 }
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
717 return status;
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
718 }
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
719
0
a61af66fc99e Initial load
duke
parents:
diff changeset
720 // The following method is provided to see whether a given pointer
a61af66fc99e Initial load
duke
parents:
diff changeset
721 // falls in the mapped shared space.
a61af66fc99e Initial load
duke
parents:
diff changeset
722 // Param:
a61af66fc99e Initial load
duke
parents:
diff changeset
723 // p, The given pointer
a61af66fc99e Initial load
duke
parents:
diff changeset
724 // Return:
a61af66fc99e Initial load
duke
parents:
diff changeset
725 // True if the p is within the mapped shared space, otherwise, false.
a61af66fc99e Initial load
duke
parents:
diff changeset
726 bool FileMapInfo::is_in_shared_space(const void* p) {
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 1980
diff changeset
727 for (int i = 0; i < MetaspaceShared::n_regions; i++) {
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
728 if (p >= _header->_space[i]._base &&
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
729 p < _header->_space[i]._base + _header->_space[i]._used) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
730 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
731 }
a61af66fc99e Initial load
duke
parents:
diff changeset
732 }
a61af66fc99e Initial load
duke
parents:
diff changeset
733
a61af66fc99e Initial load
duke
parents:
diff changeset
734 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
735 }
11056
221df7e37535 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 10183
diff changeset
736
221df7e37535 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 10183
diff changeset
737 void FileMapInfo::print_shared_spaces() {
221df7e37535 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 10183
diff changeset
738 gclog_or_tty->print_cr("Shared Spaces:");
221df7e37535 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 10183
diff changeset
739 for (int i = 0; i < MetaspaceShared::n_regions; i++) {
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
740 struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[i];
11056
221df7e37535 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 10183
diff changeset
741 gclog_or_tty->print(" %s " INTPTR_FORMAT "-" INTPTR_FORMAT,
221df7e37535 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 10183
diff changeset
742 shared_region_name[i],
221df7e37535 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 10183
diff changeset
743 si->_base, si->_base + si->_used);
221df7e37535 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 10183
diff changeset
744 }
221df7e37535 8016075: Win32 crash with CDS enabled and small heap size
iklam
parents: 10183
diff changeset
745 }
12056
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
746
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
747 // Unmap mapped regions of shared space.
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
748 void FileMapInfo::stop_sharing_and_unmap(const char* msg) {
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
749 FileMapInfo *map_info = FileMapInfo::current_info();
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
750 if (map_info) {
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
751 map_info->fail_continue(msg);
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
752 for (int i = 0; i < MetaspaceShared::n_regions; i++) {
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
753 if (map_info->_header->_space[i]._base != NULL) {
12056
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
754 map_info->unmap_region(i);
20375
6e0cb14ce59b 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 17937
diff changeset
755 map_info->_header->_space[i]._base = NULL;
12056
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
756 }
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
757 }
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
758 } else if (DumpSharedSpaces) {
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
759 fail_stop(msg, NULL);
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
760 }
740e263c80c6 8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents: 11056
diff changeset
761 }