Mercurial > hg > truffle
annotate src/share/vm/memory/filemap.cpp @ 12056:740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
8016729: ObjectAlignmentInBytes=16 now forces the use of heap based compressed oops
8005933: The -Xshare:auto option is ignored for -server
Summary: Move klass metaspace above the heap and support CDS with compressed klass ptrs.
Reviewed-by: coleenp, kvn, mgerdin, tschatzl, stefank
| author | hseigel |
|---|---|
| date | Thu, 15 Aug 2013 20:04:10 -0400 |
| parents | 221df7e37535 |
| children | 35b99e7e0af2 |
| 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"); | |
| 58 vm_exit_during_initialization("Unable to use shared archive.", NULL); | |
| 59 } | |
| 60 | |
| 61 | |
| 62 void FileMapInfo::fail_stop(const char *msg, ...) { | |
| 63 va_list ap; | |
| 64 va_start(ap, msg); | |
| 65 fail(msg, ap); // Never returns. | |
| 66 va_end(ap); // for completeness. | |
| 67 } | |
| 68 | |
| 69 | |
| 70 // Complain and continue. Recoverable errors during the reading of the | |
| 71 // archive file may continue (with sharing disabled). | |
| 72 // | |
| 73 // If we continue, then disable shared spaces and close the file. | |
| 74 | |
| 75 void FileMapInfo::fail_continue(const char *msg, ...) { | |
| 76 va_list ap; | |
| 77 va_start(ap, msg); | |
| 78 if (RequireSharedSpaces) { | |
| 79 fail(msg, ap); | |
| 80 } | |
| 81 va_end(ap); | |
| 82 UseSharedSpaces = false; | |
| 83 close(); | |
| 84 } | |
| 85 | |
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86 // Fill in the fileMapInfo structure with data about this VM instance. |
| 0 | 87 |
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88 // This method copies the vm version info into header_version. If the version is too |
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89 // long then a truncated version, which has a hash code appended to it, is copied. |
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90 // |
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91 // Using a template enables this method to verify that header_version is an array of |
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92 // length JVM_IDENT_MAX. This ensures that the code that writes to the CDS file and |
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93 // the code that reads the CDS file will both use the same size buffer. Hence, will |
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94 // use identical truncation. This is necessary for matching of truncated versions. |
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95 template <int N> static void get_header_version(char (&header_version) [N]) { |
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96 assert(N == JVM_IDENT_MAX, "Bad header_version size"); |
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97 |
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98 const char *vm_version = VM_Version::internal_vm_info_string(); |
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99 const int version_len = (int)strlen(vm_version); |
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100 |
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101 if (version_len < (JVM_IDENT_MAX-1)) { |
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102 strcpy(header_version, vm_version); |
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103 |
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104 } else { |
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105 // Get the hash value. Use a static seed because the hash needs to return the same |
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106 // value over multiple jvm invocations. |
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107 unsigned int hash = AltHashing::murmur3_32(8191, (const jbyte*)vm_version, version_len); |
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108 |
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109 // Truncate the ident, saving room for the 8 hex character hash value. |
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110 strncpy(header_version, vm_version, JVM_IDENT_MAX-9); |
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111 |
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112 // Append the hash code as eight hex digits. |
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113 sprintf(&header_version[JVM_IDENT_MAX-9], "%08x", hash); |
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114 header_version[JVM_IDENT_MAX-1] = 0; // Null terminate. |
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115 } |
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116 } |
| 0 | 117 |
| 118 void FileMapInfo::populate_header(size_t alignment) { | |
| 119 _header._magic = 0xf00baba2; | |
| 120 _header._version = _current_version; | |
| 121 _header._alignment = alignment; | |
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122 _header._obj_alignment = ObjectAlignmentInBytes; |
| 0 | 123 |
| 124 // The following fields are for sanity checks for whether this archive | |
| 125 // will function correctly with this JVM and the bootclasspath it's | |
| 126 // invoked with. | |
| 127 | |
| 128 // JVM version string ... changes on each build. | |
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129 get_header_version(_header._jvm_ident); |
| 0 | 130 |
| 131 // Build checks on classpath and jar files | |
| 132 _header._num_jars = 0; | |
| 133 ClassPathEntry *cpe = ClassLoader::classpath_entry(0); | |
| 134 for ( ; cpe != NULL; cpe = cpe->next()) { | |
| 135 | |
| 136 if (cpe->is_jar_file()) { | |
| 137 if (_header._num_jars >= JVM_SHARED_JARS_MAX) { | |
| 138 fail_stop("Too many jar files to share.", NULL); | |
| 139 } | |
| 140 | |
| 141 // Jar file - record timestamp and file size. | |
| 142 struct stat st; | |
| 143 const char *path = cpe->name(); | |
| 144 if (os::stat(path, &st) != 0) { | |
| 145 // If we can't access a jar file in the boot path, then we can't | |
| 146 // make assumptions about where classes get loaded from. | |
| 147 fail_stop("Unable to open jar file %s.", path); | |
| 148 } | |
| 149 _header._jar[_header._num_jars]._timestamp = st.st_mtime; | |
| 150 _header._jar[_header._num_jars]._filesize = st.st_size; | |
| 151 _header._num_jars++; | |
| 152 } else { | |
| 153 | |
| 154 // If directories appear in boot classpath, they must be empty to | |
| 155 // avoid having to verify each individual class file. | |
| 156 const char* name = ((ClassPathDirEntry*)cpe)->name(); | |
| 157 if (!os::dir_is_empty(name)) { | |
| 158 fail_stop("Boot classpath directory %s is not empty.", name); | |
| 159 } | |
| 160 } | |
| 161 } | |
| 162 } | |
| 163 | |
| 164 | |
| 165 // Read the FileMapInfo information from the file. | |
| 166 | |
| 167 bool FileMapInfo::init_from_file(int fd) { | |
| 168 | |
| 169 size_t n = read(fd, &_header, sizeof(struct FileMapHeader)); | |
| 170 if (n != sizeof(struct FileMapHeader)) { | |
| 171 fail_continue("Unable to read the file header."); | |
| 172 return false; | |
| 173 } | |
| 174 if (_header._version != current_version()) { | |
| 175 fail_continue("The shared archive file has the wrong version."); | |
| 176 return false; | |
| 177 } | |
| 178 _file_offset = (long)n; | |
| 179 return true; | |
| 180 } | |
| 181 | |
| 182 | |
| 183 // Read the FileMapInfo information from the file. | |
| 184 bool FileMapInfo::open_for_read() { | |
| 185 _full_path = Arguments::GetSharedArchivePath(); | |
| 186 int fd = open(_full_path, O_RDONLY | O_BINARY, 0); | |
| 187 if (fd < 0) { | |
| 188 if (errno == ENOENT) { | |
| 189 // Not locating the shared archive is ok. | |
| 190 fail_continue("Specified shared archive not found."); | |
| 191 } else { | |
| 192 fail_continue("Failed to open shared archive file (%s).", | |
| 193 strerror(errno)); | |
| 194 } | |
| 195 return false; | |
| 196 } | |
| 197 | |
| 198 _fd = fd; | |
| 199 _file_open = true; | |
| 200 return true; | |
| 201 } | |
| 202 | |
| 203 | |
| 204 // Write the FileMapInfo information to the file. | |
| 205 | |
| 206 void FileMapInfo::open_for_write() { | |
| 207 _full_path = Arguments::GetSharedArchivePath(); | |
| 208 if (PrintSharedSpaces) { | |
| 209 tty->print_cr("Dumping shared data to file: "); | |
| 210 tty->print_cr(" %s", _full_path); | |
| 211 } | |
| 212 | |
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213 #ifdef _WINDOWS // On Windows, need WRITE permission to remove the file. |
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214 chmod(_full_path, _S_IREAD | _S_IWRITE); |
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215 #endif |
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216 |
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217 // Use remove() to delete the existing file because, on Unix, this will |
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218 // allow processes that have it open continued access to the file. |
| 0 | 219 remove(_full_path); |
| 220 int fd = open(_full_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0444); | |
| 221 if (fd < 0) { | |
| 222 fail_stop("Unable to create shared archive file %s.", _full_path); | |
| 223 } | |
| 224 _fd = fd; | |
| 225 _file_offset = 0; | |
| 226 _file_open = true; | |
| 227 } | |
| 228 | |
| 229 | |
| 230 // Write the header to the file, seek to the next allocation boundary. | |
| 231 | |
| 232 void FileMapInfo::write_header() { | |
| 233 write_bytes_aligned(&_header, sizeof(FileMapHeader)); | |
| 234 } | |
| 235 | |
| 236 | |
| 237 // Dump shared spaces to file. | |
| 238 | |
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239 void FileMapInfo::write_space(int i, Metaspace* space, bool read_only) { |
| 0 | 240 align_file_position(); |
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241 size_t used = space->used_bytes_slow(Metaspace::NonClassType); |
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242 size_t capacity = space->capacity_bytes_slow(Metaspace::NonClassType); |
| 0 | 243 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[i]; |
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244 write_region(i, (char*)space->bottom(), used, capacity, read_only, false); |
| 0 | 245 } |
| 246 | |
| 247 | |
| 248 // Dump region to file. | |
| 249 | |
| 250 void FileMapInfo::write_region(int region, char* base, size_t size, | |
| 251 size_t capacity, bool read_only, | |
| 252 bool allow_exec) { | |
| 253 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[region]; | |
| 254 | |
| 255 if (_file_open) { | |
| 256 guarantee(si->_file_offset == _file_offset, "file offset mismatch."); | |
| 257 if (PrintSharedSpaces) { | |
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258 tty->print_cr("Shared file region %d: 0x%6x bytes, addr " INTPTR_FORMAT |
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259 " file offset 0x%6x", region, size, base, _file_offset); |
| 0 | 260 } |
| 261 } else { | |
| 262 si->_file_offset = _file_offset; | |
| 263 } | |
| 264 si->_base = base; | |
| 265 si->_used = size; | |
| 266 si->_capacity = capacity; | |
| 267 si->_read_only = read_only; | |
| 268 si->_allow_exec = allow_exec; | |
| 269 write_bytes_aligned(base, (int)size); | |
| 270 } | |
| 271 | |
| 272 | |
| 273 // Dump bytes to file -- at the current file position. | |
| 274 | |
| 275 void FileMapInfo::write_bytes(const void* buffer, int nbytes) { | |
| 276 if (_file_open) { | |
| 277 int n = ::write(_fd, buffer, nbytes); | |
| 278 if (n != nbytes) { | |
| 279 // It is dangerous to leave the corrupted shared archive file around, | |
| 280 // close and remove the file. See bug 6372906. | |
| 281 close(); | |
| 282 remove(_full_path); | |
| 283 fail_stop("Unable to write to shared archive file.", NULL); | |
| 284 } | |
| 285 } | |
| 286 _file_offset += nbytes; | |
| 287 } | |
| 288 | |
| 289 | |
| 290 // Align file position to an allocation unit boundary. | |
| 291 | |
| 292 void FileMapInfo::align_file_position() { | |
| 293 long new_file_offset = align_size_up(_file_offset, os::vm_allocation_granularity()); | |
| 294 if (new_file_offset != _file_offset) { | |
| 295 _file_offset = new_file_offset; | |
| 296 if (_file_open) { | |
| 297 // Seek one byte back from the target and write a byte to insure | |
| 298 // that the written file is the correct length. | |
| 299 _file_offset -= 1; | |
| 300 if (lseek(_fd, _file_offset, SEEK_SET) < 0) { | |
| 301 fail_stop("Unable to seek.", NULL); | |
| 302 } | |
| 303 char zero = 0; | |
| 304 write_bytes(&zero, 1); | |
| 305 } | |
| 306 } | |
| 307 } | |
| 308 | |
| 309 | |
| 310 // Dump bytes to file -- at the current file position. | |
| 311 | |
| 312 void FileMapInfo::write_bytes_aligned(const void* buffer, int nbytes) { | |
| 313 align_file_position(); | |
| 314 write_bytes(buffer, nbytes); | |
| 315 align_file_position(); | |
| 316 } | |
| 317 | |
| 318 | |
| 319 // Close the shared archive file. This does NOT unmap mapped regions. | |
| 320 | |
| 321 void FileMapInfo::close() { | |
| 322 if (_file_open) { | |
| 323 if (::close(_fd) < 0) { | |
| 324 fail_stop("Unable to close the shared archive file."); | |
| 325 } | |
| 326 _file_open = false; | |
| 327 _fd = -1; | |
| 328 } | |
| 329 } | |
| 330 | |
| 331 | |
| 332 // JVM/TI RedefineClasses() support: | |
| 333 // Remap the shared readonly space to shared readwrite, private. | |
| 334 bool FileMapInfo::remap_shared_readonly_as_readwrite() { | |
| 335 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[0]; | |
| 336 if (!si->_read_only) { | |
| 337 // the space is already readwrite so we are done | |
| 338 return true; | |
| 339 } | |
| 340 size_t used = si->_used; | |
| 341 size_t size = align_size_up(used, os::vm_allocation_granularity()); | |
| 342 if (!open_for_read()) { | |
| 343 return false; | |
| 344 } | |
| 345 char *base = os::remap_memory(_fd, _full_path, si->_file_offset, | |
| 346 si->_base, size, false /* !read_only */, | |
| 347 si->_allow_exec); | |
| 348 close(); | |
| 349 if (base == NULL) { | |
| 350 fail_continue("Unable to remap shared readonly space (errno=%d).", errno); | |
| 351 return false; | |
| 352 } | |
| 353 if (base != si->_base) { | |
| 354 fail_continue("Unable to remap shared readonly space at required address."); | |
| 355 return false; | |
| 356 } | |
| 357 si->_read_only = false; | |
| 358 return true; | |
| 359 } | |
| 360 | |
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361 // Map the whole region at once, assumed to be allocated contiguously. |
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362 ReservedSpace FileMapInfo::reserve_shared_memory() { |
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363 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[0]; |
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364 char* requested_addr = si->_base; |
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365 |
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366 size_t size = FileMapInfo::shared_spaces_size(); |
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367 |
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368 // Reserve the space first, then map otherwise map will go right over some |
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369 // other reserved memory (like the code cache). |
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370 ReservedSpace rs(size, os::vm_allocation_granularity(), false, requested_addr); |
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371 if (!rs.is_reserved()) { |
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372 fail_continue(err_msg("Unable to reserve shared space at required address " INTPTR_FORMAT, requested_addr)); |
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373 return rs; |
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374 } |
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375 // the reserved virtual memory is for mapping class data sharing archive |
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376 MemTracker::record_virtual_memory_type((address)rs.base(), mtClassShared); |
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377 |
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378 return rs; |
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379 } |
| 0 | 380 |
| 381 // Memory map a region in the address space. | |
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382 static const char* shared_region_name[] = { "ReadOnly", "ReadWrite", "MiscData", "MiscCode"}; |
| 0 | 383 |
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384 char* FileMapInfo::map_region(int i) { |
| 0 | 385 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[i]; |
| 386 size_t used = si->_used; | |
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387 size_t alignment = os::vm_allocation_granularity(); |
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388 size_t size = align_size_up(used, alignment); |
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389 char *requested_addr = si->_base; |
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390 |
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391 // map the contents of the CDS archive in this memory |
| 0 | 392 char *base = os::map_memory(_fd, _full_path, si->_file_offset, |
| 393 requested_addr, size, si->_read_only, | |
| 394 si->_allow_exec); | |
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395 if (base == NULL || base != si->_base) { |
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396 fail_continue(err_msg("Unable to map %s shared space at required address.", shared_region_name[i])); |
| 0 | 397 return NULL; |
| 398 } | |
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399 #ifdef _WINDOWS |
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400 // This call is Windows-only because the memory_type gets recorded for the other platforms |
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401 // in method FileMapInfo::reserve_shared_memory(), which is not called on Windows. |
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402 MemTracker::record_virtual_memory_type((address)base, mtClassShared); |
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403 #endif |
| 0 | 404 return base; |
| 405 } | |
| 406 | |
| 407 | |
| 408 // Unmap a memory region in the address space. | |
| 409 | |
| 410 void FileMapInfo::unmap_region(int i) { | |
| 411 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[i]; | |
| 412 size_t used = si->_used; | |
| 413 size_t size = align_size_up(used, os::vm_allocation_granularity()); | |
| 414 if (!os::unmap_memory(si->_base, size)) { | |
| 415 fail_stop("Unable to unmap shared space."); | |
| 416 } | |
| 417 } | |
| 418 | |
| 419 | |
| 420 void FileMapInfo::assert_mark(bool check) { | |
| 421 if (!check) { | |
| 422 fail_stop("Mark mismatch while restoring from shared file.", NULL); | |
| 423 } | |
| 424 } | |
| 425 | |
| 426 | |
| 427 FileMapInfo* FileMapInfo::_current_info = NULL; | |
| 428 | |
| 429 | |
| 430 // Open the shared archive file, read and validate the header | |
| 431 // information (version, boot classpath, etc.). If initialization | |
| 432 // fails, shared spaces are disabled and the file is closed. [See | |
| 433 // fail_continue.] | |
| 434 bool FileMapInfo::initialize() { | |
| 435 assert(UseSharedSpaces, "UseSharedSpaces expected."); | |
| 436 | |
| 437 if (JvmtiExport::can_modify_any_class() || JvmtiExport::can_walk_any_space()) { | |
| 438 fail_continue("Tool agent requires sharing to be disabled."); | |
| 439 return false; | |
| 440 } | |
| 441 | |
| 442 if (!open_for_read()) { | |
| 443 return false; | |
| 444 } | |
| 445 | |
| 446 init_from_file(_fd); | |
| 447 if (!validate()) { | |
| 448 return false; | |
| 449 } | |
| 450 | |
| 451 SharedReadOnlySize = _header._space[0]._capacity; | |
| 452 SharedReadWriteSize = _header._space[1]._capacity; | |
| 453 SharedMiscDataSize = _header._space[2]._capacity; | |
| 454 SharedMiscCodeSize = _header._space[3]._capacity; | |
| 455 return true; | |
| 456 } | |
| 457 | |
| 458 | |
| 459 bool FileMapInfo::validate() { | |
| 460 if (_header._version != current_version()) { | |
| 461 fail_continue("The shared archive file is the wrong version."); | |
| 462 return false; | |
| 463 } | |
| 464 if (_header._magic != (int)0xf00baba2) { | |
| 465 fail_continue("The shared archive file has a bad magic number."); | |
| 466 return false; | |
| 467 } | |
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468 char header_version[JVM_IDENT_MAX]; |
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469 get_header_version(header_version); |
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470 if (strncmp(_header._jvm_ident, header_version, JVM_IDENT_MAX-1) != 0) { |
| 0 | 471 fail_continue("The shared archive file was created by a different" |
| 472 " version or build of HotSpot."); | |
| 473 return false; | |
| 474 } | |
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475 if (_header._obj_alignment != ObjectAlignmentInBytes) { |
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476 fail_continue("The shared archive file's ObjectAlignmentInBytes of %d" |
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477 " does not equal the current ObjectAlignmentInBytes of %d.", |
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478 _header._obj_alignment, ObjectAlignmentInBytes); |
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479 return false; |
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480 } |
| 0 | 481 |
| 482 // Cannot verify interpreter yet, as it can only be created after the GC | |
| 483 // heap has been initialized. | |
| 484 | |
| 485 if (_header._num_jars >= JVM_SHARED_JARS_MAX) { | |
| 486 fail_continue("Too many jar files to share."); | |
| 487 return false; | |
| 488 } | |
| 489 | |
| 490 // Build checks on classpath and jar files | |
| 491 int num_jars_now = 0; | |
| 492 ClassPathEntry *cpe = ClassLoader::classpath_entry(0); | |
| 493 for ( ; cpe != NULL; cpe = cpe->next()) { | |
| 494 | |
| 495 if (cpe->is_jar_file()) { | |
| 496 if (num_jars_now < _header._num_jars) { | |
| 497 | |
| 498 // Jar file - verify timestamp and file size. | |
| 499 struct stat st; | |
| 500 const char *path = cpe->name(); | |
| 501 if (os::stat(path, &st) != 0) { | |
| 502 fail_continue("Unable to open jar file %s.", path); | |
| 503 return false; | |
| 504 } | |
| 505 if (_header._jar[num_jars_now]._timestamp != st.st_mtime || | |
| 506 _header._jar[num_jars_now]._filesize != st.st_size) { | |
| 507 fail_continue("A jar file is not the one used while building" | |
| 508 " the shared archive file."); | |
| 509 return false; | |
| 510 } | |
| 511 } | |
| 512 ++num_jars_now; | |
| 513 } else { | |
| 514 | |
| 515 // If directories appear in boot classpath, they must be empty to | |
| 516 // avoid having to verify each individual class file. | |
| 517 const char* name = ((ClassPathDirEntry*)cpe)->name(); | |
| 518 if (!os::dir_is_empty(name)) { | |
| 519 fail_continue("Boot classpath directory %s is not empty.", name); | |
| 520 return false; | |
| 521 } | |
| 522 } | |
| 523 } | |
| 524 if (num_jars_now < _header._num_jars) { | |
| 525 fail_continue("The number of jar files in the boot classpath is" | |
| 526 " less than the number the shared archive was created with."); | |
| 527 return false; | |
| 528 } | |
| 529 | |
| 530 return true; | |
| 531 } | |
| 532 | |
| 533 // The following method is provided to see whether a given pointer | |
| 534 // falls in the mapped shared space. | |
| 535 // Param: | |
| 536 // p, The given pointer | |
| 537 // Return: | |
| 538 // True if the p is within the mapped shared space, otherwise, false. | |
| 539 bool FileMapInfo::is_in_shared_space(const void* p) { | |
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540 for (int i = 0; i < MetaspaceShared::n_regions; i++) { |
| 0 | 541 if (p >= _header._space[i]._base && |
| 542 p < _header._space[i]._base + _header._space[i]._used) { | |
| 543 return true; | |
| 544 } | |
| 545 } | |
| 546 | |
| 547 return false; | |
| 548 } | |
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549 |
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550 void FileMapInfo::print_shared_spaces() { |
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551 gclog_or_tty->print_cr("Shared Spaces:"); |
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552 for (int i = 0; i < MetaspaceShared::n_regions; i++) { |
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553 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[i]; |
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554 gclog_or_tty->print(" %s " INTPTR_FORMAT "-" INTPTR_FORMAT, |
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555 shared_region_name[i], |
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556 si->_base, si->_base + si->_used); |
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557 } |
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558 } |
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559 |
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560 // Unmap mapped regions of shared space. |
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561 void FileMapInfo::stop_sharing_and_unmap(const char* msg) { |
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562 FileMapInfo *map_info = FileMapInfo::current_info(); |
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563 if (map_info) { |
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564 map_info->fail_continue(msg); |
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565 for (int i = 0; i < MetaspaceShared::n_regions; i++) { |
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566 if (map_info->_header._space[i]._base != NULL) { |
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567 map_info->unmap_region(i); |
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568 map_info->_header._space[i]._base = NULL; |
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569 } |
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570 } |
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571 } else if (DumpSharedSpaces) { |
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572 fail_stop(msg, NULL); |
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573 } |
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574 } |