Mercurial > hg > truffle
annotate src/share/vm/memory/filemap.cpp @ 14659:ff056d90e349
8033990: Add message to verbose output to indicate when JVM was unable to use shared archive (with -Xshare:auto)
Summary: Added message to indicate when sharing was attempted but failed
Reviewed-by: coleenp, ctornqvi
| author | mseledtsov |
|---|---|
| date | Wed, 05 Mar 2014 12:31:09 -0500 |
| parents | 35b99e7e0af2 |
| children | 92aa6797d639 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/classLoader.hpp" | |
| 27 #include "classfile/symbolTable.hpp" | |
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28 #include "classfile/altHashing.hpp" |
| 1972 | 29 #include "memory/filemap.hpp" |
| 30 #include "runtime/arguments.hpp" | |
| 31 #include "runtime/java.hpp" | |
| 32 #include "runtime/os.hpp" | |
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33 #include "services/memTracker.hpp" |
| 1972 | 34 #include "utilities/defaultStream.hpp" |
| 35 | |
| 0 | 36 # include <sys/stat.h> |
| 37 # include <errno.h> | |
| 38 | |
| 39 #ifndef O_BINARY // if defined (Win32) use binary files. | |
| 40 #define O_BINARY 0 // otherwise do nothing. | |
| 41 #endif | |
| 42 | |
| 43 | |
| 44 extern address JVM_FunctionAtStart(); | |
| 45 extern address JVM_FunctionAtEnd(); | |
| 46 | |
| 605 | 47 // Complain and stop. All error conditions occurring during the writing of |
| 0 | 48 // an archive file should stop the process. Unrecoverable errors during |
| 49 // the reading of the archive file should stop the process. | |
| 50 | |
| 51 static void fail(const char *msg, va_list ap) { | |
| 52 // This occurs very early during initialization: tty is not initialized. | |
| 53 jio_fprintf(defaultStream::error_stream(), | |
| 605 | 54 "An error has occurred while processing the" |
| 0 | 55 " shared archive file.\n"); |
| 56 jio_vfprintf(defaultStream::error_stream(), msg, ap); | |
| 57 jio_fprintf(defaultStream::error_stream(), "\n"); | |
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58 // Do not change the text of the below message because some tests check for it. |
| 0 | 59 vm_exit_during_initialization("Unable to use shared archive.", NULL); |
| 60 } | |
| 61 | |
| 62 | |
| 63 void FileMapInfo::fail_stop(const char *msg, ...) { | |
| 64 va_list ap; | |
| 65 va_start(ap, msg); | |
| 66 fail(msg, ap); // Never returns. | |
| 67 va_end(ap); // for completeness. | |
| 68 } | |
| 69 | |
| 70 | |
| 71 // Complain and continue. Recoverable errors during the reading of the | |
| 72 // archive file may continue (with sharing disabled). | |
| 73 // | |
| 74 // If we continue, then disable shared spaces and close the file. | |
| 75 | |
| 76 void FileMapInfo::fail_continue(const char *msg, ...) { | |
| 77 va_list ap; | |
| 78 va_start(ap, msg); | |
| 79 if (RequireSharedSpaces) { | |
| 80 fail(msg, ap); | |
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81 } else { |
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82 if (PrintSharedSpaces) { |
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83 tty->print_cr("UseSharedSpaces: %s", msg); |
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84 } |
| 0 | 85 } |
| 86 va_end(ap); | |
| 87 UseSharedSpaces = false; | |
| 88 close(); | |
| 89 } | |
| 90 | |
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91 // Fill in the fileMapInfo structure with data about this VM instance. |
| 0 | 92 |
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93 // This method copies the vm version info into header_version. If the version is too |
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94 // long then a truncated version, which has a hash code appended to it, is copied. |
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95 // |
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96 // Using a template enables this method to verify that header_version is an array of |
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97 // length JVM_IDENT_MAX. This ensures that the code that writes to the CDS file and |
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98 // the code that reads the CDS file will both use the same size buffer. Hence, will |
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99 // use identical truncation. This is necessary for matching of truncated versions. |
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100 template <int N> static void get_header_version(char (&header_version) [N]) { |
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101 assert(N == JVM_IDENT_MAX, "Bad header_version size"); |
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102 |
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103 const char *vm_version = VM_Version::internal_vm_info_string(); |
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104 const int version_len = (int)strlen(vm_version); |
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105 |
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106 if (version_len < (JVM_IDENT_MAX-1)) { |
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107 strcpy(header_version, vm_version); |
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108 |
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109 } else { |
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110 // Get the hash value. Use a static seed because the hash needs to return the same |
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111 // value over multiple jvm invocations. |
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112 unsigned int hash = AltHashing::murmur3_32(8191, (const jbyte*)vm_version, version_len); |
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113 |
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114 // Truncate the ident, saving room for the 8 hex character hash value. |
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115 strncpy(header_version, vm_version, JVM_IDENT_MAX-9); |
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116 |
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117 // Append the hash code as eight hex digits. |
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118 sprintf(&header_version[JVM_IDENT_MAX-9], "%08x", hash); |
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119 header_version[JVM_IDENT_MAX-1] = 0; // Null terminate. |
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120 } |
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121 } |
| 0 | 122 |
| 123 void FileMapInfo::populate_header(size_t alignment) { | |
| 124 _header._magic = 0xf00baba2; | |
| 125 _header._version = _current_version; | |
| 126 _header._alignment = alignment; | |
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127 _header._obj_alignment = ObjectAlignmentInBytes; |
| 0 | 128 |
| 129 // The following fields are for sanity checks for whether this archive | |
| 130 // will function correctly with this JVM and the bootclasspath it's | |
| 131 // invoked with. | |
| 132 | |
| 133 // JVM version string ... changes on each build. | |
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134 get_header_version(_header._jvm_ident); |
| 0 | 135 |
| 136 // Build checks on classpath and jar files | |
| 137 _header._num_jars = 0; | |
| 138 ClassPathEntry *cpe = ClassLoader::classpath_entry(0); | |
| 139 for ( ; cpe != NULL; cpe = cpe->next()) { | |
| 140 | |
| 141 if (cpe->is_jar_file()) { | |
| 142 if (_header._num_jars >= JVM_SHARED_JARS_MAX) { | |
| 143 fail_stop("Too many jar files to share.", NULL); | |
| 144 } | |
| 145 | |
| 146 // Jar file - record timestamp and file size. | |
| 147 struct stat st; | |
| 148 const char *path = cpe->name(); | |
| 149 if (os::stat(path, &st) != 0) { | |
| 150 // If we can't access a jar file in the boot path, then we can't | |
| 151 // make assumptions about where classes get loaded from. | |
| 152 fail_stop("Unable to open jar file %s.", path); | |
| 153 } | |
| 154 _header._jar[_header._num_jars]._timestamp = st.st_mtime; | |
| 155 _header._jar[_header._num_jars]._filesize = st.st_size; | |
| 156 _header._num_jars++; | |
| 157 } else { | |
| 158 | |
| 159 // If directories appear in boot classpath, they must be empty to | |
| 160 // avoid having to verify each individual class file. | |
| 161 const char* name = ((ClassPathDirEntry*)cpe)->name(); | |
| 162 if (!os::dir_is_empty(name)) { | |
| 163 fail_stop("Boot classpath directory %s is not empty.", name); | |
| 164 } | |
| 165 } | |
| 166 } | |
| 167 } | |
| 168 | |
| 169 | |
| 170 // Read the FileMapInfo information from the file. | |
| 171 | |
| 172 bool FileMapInfo::init_from_file(int fd) { | |
| 173 | |
| 174 size_t n = read(fd, &_header, sizeof(struct FileMapHeader)); | |
| 175 if (n != sizeof(struct FileMapHeader)) { | |
| 176 fail_continue("Unable to read the file header."); | |
| 177 return false; | |
| 178 } | |
| 179 if (_header._version != current_version()) { | |
| 180 fail_continue("The shared archive file has the wrong version."); | |
| 181 return false; | |
| 182 } | |
| 183 _file_offset = (long)n; | |
| 184 return true; | |
| 185 } | |
| 186 | |
| 187 | |
| 188 // Read the FileMapInfo information from the file. | |
| 189 bool FileMapInfo::open_for_read() { | |
| 190 _full_path = Arguments::GetSharedArchivePath(); | |
| 191 int fd = open(_full_path, O_RDONLY | O_BINARY, 0); | |
| 192 if (fd < 0) { | |
| 193 if (errno == ENOENT) { | |
| 194 // Not locating the shared archive is ok. | |
| 195 fail_continue("Specified shared archive not found."); | |
| 196 } else { | |
| 197 fail_continue("Failed to open shared archive file (%s).", | |
| 198 strerror(errno)); | |
| 199 } | |
| 200 return false; | |
| 201 } | |
| 202 | |
| 203 _fd = fd; | |
| 204 _file_open = true; | |
| 205 return true; | |
| 206 } | |
| 207 | |
| 208 | |
| 209 // Write the FileMapInfo information to the file. | |
| 210 | |
| 211 void FileMapInfo::open_for_write() { | |
| 212 _full_path = Arguments::GetSharedArchivePath(); | |
| 213 if (PrintSharedSpaces) { | |
| 214 tty->print_cr("Dumping shared data to file: "); | |
| 215 tty->print_cr(" %s", _full_path); | |
| 216 } | |
| 217 | |
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218 #ifdef _WINDOWS // On Windows, need WRITE permission to remove the file. |
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219 chmod(_full_path, _S_IREAD | _S_IWRITE); |
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220 #endif |
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221 |
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222 // Use remove() to delete the existing file because, on Unix, this will |
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223 // allow processes that have it open continued access to the file. |
| 0 | 224 remove(_full_path); |
| 225 int fd = open(_full_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0444); | |
| 226 if (fd < 0) { | |
| 227 fail_stop("Unable to create shared archive file %s.", _full_path); | |
| 228 } | |
| 229 _fd = fd; | |
| 230 _file_offset = 0; | |
| 231 _file_open = true; | |
| 232 } | |
| 233 | |
| 234 | |
| 235 // Write the header to the file, seek to the next allocation boundary. | |
| 236 | |
| 237 void FileMapInfo::write_header() { | |
| 238 write_bytes_aligned(&_header, sizeof(FileMapHeader)); | |
| 239 } | |
| 240 | |
| 241 | |
| 242 // Dump shared spaces to file. | |
| 243 | |
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244 void FileMapInfo::write_space(int i, Metaspace* space, bool read_only) { |
| 0 | 245 align_file_position(); |
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246 size_t used = space->used_bytes_slow(Metaspace::NonClassType); |
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247 size_t capacity = space->capacity_bytes_slow(Metaspace::NonClassType); |
| 0 | 248 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[i]; |
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249 write_region(i, (char*)space->bottom(), used, capacity, read_only, false); |
| 0 | 250 } |
| 251 | |
| 252 | |
| 253 // Dump region to file. | |
| 254 | |
| 255 void FileMapInfo::write_region(int region, char* base, size_t size, | |
| 256 size_t capacity, bool read_only, | |
| 257 bool allow_exec) { | |
| 258 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[region]; | |
| 259 | |
| 260 if (_file_open) { | |
| 261 guarantee(si->_file_offset == _file_offset, "file offset mismatch."); | |
| 262 if (PrintSharedSpaces) { | |
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263 tty->print_cr("Shared file region %d: 0x%6x bytes, addr " INTPTR_FORMAT |
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264 " file offset 0x%6x", region, size, base, _file_offset); |
| 0 | 265 } |
| 266 } else { | |
| 267 si->_file_offset = _file_offset; | |
| 268 } | |
| 269 si->_base = base; | |
| 270 si->_used = size; | |
| 271 si->_capacity = capacity; | |
| 272 si->_read_only = read_only; | |
| 273 si->_allow_exec = allow_exec; | |
| 274 write_bytes_aligned(base, (int)size); | |
| 275 } | |
| 276 | |
| 277 | |
| 278 // Dump bytes to file -- at the current file position. | |
| 279 | |
| 280 void FileMapInfo::write_bytes(const void* buffer, int nbytes) { | |
| 281 if (_file_open) { | |
| 282 int n = ::write(_fd, buffer, nbytes); | |
| 283 if (n != nbytes) { | |
| 284 // It is dangerous to leave the corrupted shared archive file around, | |
| 285 // close and remove the file. See bug 6372906. | |
| 286 close(); | |
| 287 remove(_full_path); | |
| 288 fail_stop("Unable to write to shared archive file.", NULL); | |
| 289 } | |
| 290 } | |
| 291 _file_offset += nbytes; | |
| 292 } | |
| 293 | |
| 294 | |
| 295 // Align file position to an allocation unit boundary. | |
| 296 | |
| 297 void FileMapInfo::align_file_position() { | |
| 298 long new_file_offset = align_size_up(_file_offset, os::vm_allocation_granularity()); | |
| 299 if (new_file_offset != _file_offset) { | |
| 300 _file_offset = new_file_offset; | |
| 301 if (_file_open) { | |
| 302 // Seek one byte back from the target and write a byte to insure | |
| 303 // that the written file is the correct length. | |
| 304 _file_offset -= 1; | |
| 305 if (lseek(_fd, _file_offset, SEEK_SET) < 0) { | |
| 306 fail_stop("Unable to seek.", NULL); | |
| 307 } | |
| 308 char zero = 0; | |
| 309 write_bytes(&zero, 1); | |
| 310 } | |
| 311 } | |
| 312 } | |
| 313 | |
| 314 | |
| 315 // Dump bytes to file -- at the current file position. | |
| 316 | |
| 317 void FileMapInfo::write_bytes_aligned(const void* buffer, int nbytes) { | |
| 318 align_file_position(); | |
| 319 write_bytes(buffer, nbytes); | |
| 320 align_file_position(); | |
| 321 } | |
| 322 | |
| 323 | |
| 324 // Close the shared archive file. This does NOT unmap mapped regions. | |
| 325 | |
| 326 void FileMapInfo::close() { | |
| 327 if (_file_open) { | |
| 328 if (::close(_fd) < 0) { | |
| 329 fail_stop("Unable to close the shared archive file."); | |
| 330 } | |
| 331 _file_open = false; | |
| 332 _fd = -1; | |
| 333 } | |
| 334 } | |
| 335 | |
| 336 | |
| 337 // JVM/TI RedefineClasses() support: | |
| 338 // Remap the shared readonly space to shared readwrite, private. | |
| 339 bool FileMapInfo::remap_shared_readonly_as_readwrite() { | |
| 340 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[0]; | |
| 341 if (!si->_read_only) { | |
| 342 // the space is already readwrite so we are done | |
| 343 return true; | |
| 344 } | |
| 345 size_t used = si->_used; | |
| 346 size_t size = align_size_up(used, os::vm_allocation_granularity()); | |
| 347 if (!open_for_read()) { | |
| 348 return false; | |
| 349 } | |
| 350 char *base = os::remap_memory(_fd, _full_path, si->_file_offset, | |
| 351 si->_base, size, false /* !read_only */, | |
| 352 si->_allow_exec); | |
| 353 close(); | |
| 354 if (base == NULL) { | |
| 355 fail_continue("Unable to remap shared readonly space (errno=%d).", errno); | |
| 356 return false; | |
| 357 } | |
| 358 if (base != si->_base) { | |
| 359 fail_continue("Unable to remap shared readonly space at required address."); | |
| 360 return false; | |
| 361 } | |
| 362 si->_read_only = false; | |
| 363 return true; | |
| 364 } | |
| 365 | |
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366 // Map the whole region at once, assumed to be allocated contiguously. |
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367 ReservedSpace FileMapInfo::reserve_shared_memory() { |
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368 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[0]; |
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369 char* requested_addr = si->_base; |
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370 |
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371 size_t size = FileMapInfo::shared_spaces_size(); |
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372 |
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373 // Reserve the space first, then map otherwise map will go right over some |
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374 // other reserved memory (like the code cache). |
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375 ReservedSpace rs(size, os::vm_allocation_granularity(), false, requested_addr); |
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376 if (!rs.is_reserved()) { |
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377 fail_continue(err_msg("Unable to reserve shared space at required address " INTPTR_FORMAT, requested_addr)); |
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378 return rs; |
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379 } |
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380 // the reserved virtual memory is for mapping class data sharing archive |
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381 MemTracker::record_virtual_memory_type((address)rs.base(), mtClassShared); |
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382 |
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383 return rs; |
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384 } |
| 0 | 385 |
| 386 // Memory map a region in the address space. | |
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387 static const char* shared_region_name[] = { "ReadOnly", "ReadWrite", "MiscData", "MiscCode"}; |
| 0 | 388 |
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389 char* FileMapInfo::map_region(int i) { |
| 0 | 390 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[i]; |
| 391 size_t used = si->_used; | |
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392 size_t alignment = os::vm_allocation_granularity(); |
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393 size_t size = align_size_up(used, alignment); |
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394 char *requested_addr = si->_base; |
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395 |
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396 // map the contents of the CDS archive in this memory |
| 0 | 397 char *base = os::map_memory(_fd, _full_path, si->_file_offset, |
| 398 requested_addr, size, si->_read_only, | |
| 399 si->_allow_exec); | |
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400 if (base == NULL || base != si->_base) { |
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401 fail_continue(err_msg("Unable to map %s shared space at required address.", shared_region_name[i])); |
| 0 | 402 return NULL; |
| 403 } | |
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404 #ifdef _WINDOWS |
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405 // This call is Windows-only because the memory_type gets recorded for the other platforms |
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406 // in method FileMapInfo::reserve_shared_memory(), which is not called on Windows. |
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407 MemTracker::record_virtual_memory_type((address)base, mtClassShared); |
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408 #endif |
| 0 | 409 return base; |
| 410 } | |
| 411 | |
| 412 | |
| 413 // Unmap a memory region in the address space. | |
| 414 | |
| 415 void FileMapInfo::unmap_region(int i) { | |
| 416 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[i]; | |
| 417 size_t used = si->_used; | |
| 418 size_t size = align_size_up(used, os::vm_allocation_granularity()); | |
| 419 if (!os::unmap_memory(si->_base, size)) { | |
| 420 fail_stop("Unable to unmap shared space."); | |
| 421 } | |
| 422 } | |
| 423 | |
| 424 | |
| 425 void FileMapInfo::assert_mark(bool check) { | |
| 426 if (!check) { | |
| 427 fail_stop("Mark mismatch while restoring from shared file.", NULL); | |
| 428 } | |
| 429 } | |
| 430 | |
| 431 | |
| 432 FileMapInfo* FileMapInfo::_current_info = NULL; | |
| 433 | |
| 434 | |
| 435 // Open the shared archive file, read and validate the header | |
| 436 // information (version, boot classpath, etc.). If initialization | |
| 437 // fails, shared spaces are disabled and the file is closed. [See | |
| 438 // fail_continue.] | |
| 439 bool FileMapInfo::initialize() { | |
| 440 assert(UseSharedSpaces, "UseSharedSpaces expected."); | |
| 441 | |
| 442 if (JvmtiExport::can_modify_any_class() || JvmtiExport::can_walk_any_space()) { | |
| 443 fail_continue("Tool agent requires sharing to be disabled."); | |
| 444 return false; | |
| 445 } | |
| 446 | |
| 447 if (!open_for_read()) { | |
| 448 return false; | |
| 449 } | |
| 450 | |
| 451 init_from_file(_fd); | |
| 452 if (!validate()) { | |
| 453 return false; | |
| 454 } | |
| 455 | |
| 456 SharedReadOnlySize = _header._space[0]._capacity; | |
| 457 SharedReadWriteSize = _header._space[1]._capacity; | |
| 458 SharedMiscDataSize = _header._space[2]._capacity; | |
| 459 SharedMiscCodeSize = _header._space[3]._capacity; | |
| 460 return true; | |
| 461 } | |
| 462 | |
| 463 | |
| 464 bool FileMapInfo::validate() { | |
| 465 if (_header._version != current_version()) { | |
| 466 fail_continue("The shared archive file is the wrong version."); | |
| 467 return false; | |
| 468 } | |
| 469 if (_header._magic != (int)0xf00baba2) { | |
| 470 fail_continue("The shared archive file has a bad magic number."); | |
| 471 return false; | |
| 472 } | |
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473 char header_version[JVM_IDENT_MAX]; |
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474 get_header_version(header_version); |
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475 if (strncmp(_header._jvm_ident, header_version, JVM_IDENT_MAX-1) != 0) { |
| 0 | 476 fail_continue("The shared archive file was created by a different" |
| 477 " version or build of HotSpot."); | |
| 478 return false; | |
| 479 } | |
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480 if (_header._obj_alignment != ObjectAlignmentInBytes) { |
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481 fail_continue("The shared archive file's ObjectAlignmentInBytes of %d" |
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482 " does not equal the current ObjectAlignmentInBytes of %d.", |
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483 _header._obj_alignment, ObjectAlignmentInBytes); |
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484 return false; |
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485 } |
| 0 | 486 |
| 487 // Cannot verify interpreter yet, as it can only be created after the GC | |
| 488 // heap has been initialized. | |
| 489 | |
| 490 if (_header._num_jars >= JVM_SHARED_JARS_MAX) { | |
| 491 fail_continue("Too many jar files to share."); | |
| 492 return false; | |
| 493 } | |
| 494 | |
| 495 // Build checks on classpath and jar files | |
| 496 int num_jars_now = 0; | |
| 497 ClassPathEntry *cpe = ClassLoader::classpath_entry(0); | |
| 498 for ( ; cpe != NULL; cpe = cpe->next()) { | |
| 499 | |
| 500 if (cpe->is_jar_file()) { | |
| 501 if (num_jars_now < _header._num_jars) { | |
| 502 | |
| 503 // Jar file - verify timestamp and file size. | |
| 504 struct stat st; | |
| 505 const char *path = cpe->name(); | |
| 506 if (os::stat(path, &st) != 0) { | |
| 507 fail_continue("Unable to open jar file %s.", path); | |
| 508 return false; | |
| 509 } | |
| 510 if (_header._jar[num_jars_now]._timestamp != st.st_mtime || | |
| 511 _header._jar[num_jars_now]._filesize != st.st_size) { | |
| 512 fail_continue("A jar file is not the one used while building" | |
| 513 " the shared archive file."); | |
| 514 return false; | |
| 515 } | |
| 516 } | |
| 517 ++num_jars_now; | |
| 518 } else { | |
| 519 | |
| 520 // If directories appear in boot classpath, they must be empty to | |
| 521 // avoid having to verify each individual class file. | |
| 522 const char* name = ((ClassPathDirEntry*)cpe)->name(); | |
| 523 if (!os::dir_is_empty(name)) { | |
| 524 fail_continue("Boot classpath directory %s is not empty.", name); | |
| 525 return false; | |
| 526 } | |
| 527 } | |
| 528 } | |
| 529 if (num_jars_now < _header._num_jars) { | |
| 530 fail_continue("The number of jar files in the boot classpath is" | |
| 531 " less than the number the shared archive was created with."); | |
| 532 return false; | |
| 533 } | |
| 534 | |
| 535 return true; | |
| 536 } | |
| 537 | |
| 538 // The following method is provided to see whether a given pointer | |
| 539 // falls in the mapped shared space. | |
| 540 // Param: | |
| 541 // p, The given pointer | |
| 542 // Return: | |
| 543 // True if the p is within the mapped shared space, otherwise, false. | |
| 544 bool FileMapInfo::is_in_shared_space(const void* p) { | |
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545 for (int i = 0; i < MetaspaceShared::n_regions; i++) { |
| 0 | 546 if (p >= _header._space[i]._base && |
| 547 p < _header._space[i]._base + _header._space[i]._used) { | |
| 548 return true; | |
| 549 } | |
| 550 } | |
| 551 | |
| 552 return false; | |
| 553 } | |
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554 |
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555 void FileMapInfo::print_shared_spaces() { |
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556 gclog_or_tty->print_cr("Shared Spaces:"); |
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557 for (int i = 0; i < MetaspaceShared::n_regions; i++) { |
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558 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[i]; |
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559 gclog_or_tty->print(" %s " INTPTR_FORMAT "-" INTPTR_FORMAT, |
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560 shared_region_name[i], |
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561 si->_base, si->_base + si->_used); |
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562 } |
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563 } |
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564 |
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565 // Unmap mapped regions of shared space. |
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566 void FileMapInfo::stop_sharing_and_unmap(const char* msg) { |
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567 FileMapInfo *map_info = FileMapInfo::current_info(); |
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568 if (map_info) { |
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569 map_info->fail_continue(msg); |
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570 for (int i = 0; i < MetaspaceShared::n_regions; i++) { |
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571 if (map_info->_header._space[i]._base != NULL) { |
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572 map_info->unmap_region(i); |
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573 map_info->_header._space[i]._base = NULL; |
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574 } |
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575 } |
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576 } else if (DumpSharedSpaces) { |
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577 fail_stop(msg, NULL); |
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578 } |
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579 } |