Mercurial > hg > truffle
annotate src/share/vm/memory/filemap.cpp @ 21815:37179dcf830a
Merge
author | asaha |
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date | Mon, 20 Oct 2014 23:02:07 -0700 |
parents | ca6d25be853b |
children | 8cb56c8cb30d |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2014, 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 | |
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43 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
0 | 44 |
45 extern address JVM_FunctionAtStart(); | |
46 extern address JVM_FunctionAtEnd(); | |
47 | |
605 | 48 // Complain and stop. All error conditions occurring during the writing of |
0 | 49 // an archive file should stop the process. Unrecoverable errors during |
50 // the reading of the archive file should stop the process. | |
51 | |
52 static void fail(const char *msg, va_list ap) { | |
53 // This occurs very early during initialization: tty is not initialized. | |
54 jio_fprintf(defaultStream::error_stream(), | |
605 | 55 "An error has occurred while processing the" |
0 | 56 " shared archive file.\n"); |
57 jio_vfprintf(defaultStream::error_stream(), msg, ap); | |
58 jio_fprintf(defaultStream::error_stream(), "\n"); | |
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59 // Do not change the text of the below message because some tests check for it. |
0 | 60 vm_exit_during_initialization("Unable to use shared archive.", NULL); |
61 } | |
62 | |
63 | |
64 void FileMapInfo::fail_stop(const char *msg, ...) { | |
65 va_list ap; | |
66 va_start(ap, msg); | |
67 fail(msg, ap); // Never returns. | |
68 va_end(ap); // for completeness. | |
69 } | |
70 | |
71 | |
72 // Complain and continue. Recoverable errors during the reading of the | |
73 // archive file may continue (with sharing disabled). | |
74 // | |
75 // If we continue, then disable shared spaces and close the file. | |
76 | |
77 void FileMapInfo::fail_continue(const char *msg, ...) { | |
78 va_list ap; | |
79 va_start(ap, msg); | |
80 if (RequireSharedSpaces) { | |
81 fail(msg, ap); | |
82 } | |
83 va_end(ap); | |
84 UseSharedSpaces = false; | |
85 close(); | |
86 } | |
87 | |
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88 // Fill in the fileMapInfo structure with data about this VM instance. |
0 | 89 |
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90 // This method copies the vm version info into header_version. If the version is too |
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91 // long then a truncated version, which has a hash code appended to it, is copied. |
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92 // |
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93 // Using a template enables this method to verify that header_version is an array of |
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94 // length JVM_IDENT_MAX. This ensures that the code that writes to the CDS file and |
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95 // the code that reads the CDS file will both use the same size buffer. Hence, will |
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96 // use identical truncation. This is necessary for matching of truncated versions. |
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97 template <int N> static void get_header_version(char (&header_version) [N]) { |
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98 assert(N == JVM_IDENT_MAX, "Bad header_version size"); |
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99 |
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100 const char *vm_version = VM_Version::internal_vm_info_string(); |
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101 const int version_len = (int)strlen(vm_version); |
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102 |
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103 if (version_len < (JVM_IDENT_MAX-1)) { |
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104 strcpy(header_version, vm_version); |
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105 |
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106 } else { |
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107 // Get the hash value. Use a static seed because the hash needs to return the same |
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108 // value over multiple jvm invocations. |
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109 unsigned int hash = AltHashing::murmur3_32(8191, (const jbyte*)vm_version, version_len); |
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110 |
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111 // Truncate the ident, saving room for the 8 hex character hash value. |
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112 strncpy(header_version, vm_version, JVM_IDENT_MAX-9); |
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113 |
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114 // Append the hash code as eight hex digits. |
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115 sprintf(&header_version[JVM_IDENT_MAX-9], "%08x", hash); |
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116 header_version[JVM_IDENT_MAX-1] = 0; // Null terminate. |
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117 } |
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118 } |
0 | 119 |
120 void FileMapInfo::populate_header(size_t alignment) { | |
121 _header._magic = 0xf00baba2; | |
122 _header._version = _current_version; | |
123 _header._alignment = alignment; | |
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124 _header._obj_alignment = ObjectAlignmentInBytes; |
0 | 125 |
126 // The following fields are for sanity checks for whether this archive | |
127 // will function correctly with this JVM and the bootclasspath it's | |
128 // invoked with. | |
129 | |
130 // JVM version string ... changes on each build. | |
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131 get_header_version(_header._jvm_ident); |
0 | 132 |
133 // Build checks on classpath and jar files | |
134 _header._num_jars = 0; | |
135 ClassPathEntry *cpe = ClassLoader::classpath_entry(0); | |
136 for ( ; cpe != NULL; cpe = cpe->next()) { | |
137 | |
138 if (cpe->is_jar_file()) { | |
139 if (_header._num_jars >= JVM_SHARED_JARS_MAX) { | |
140 fail_stop("Too many jar files to share.", NULL); | |
141 } | |
142 | |
143 // Jar file - record timestamp and file size. | |
144 struct stat st; | |
145 const char *path = cpe->name(); | |
146 if (os::stat(path, &st) != 0) { | |
147 // If we can't access a jar file in the boot path, then we can't | |
148 // make assumptions about where classes get loaded from. | |
149 fail_stop("Unable to open jar file %s.", path); | |
150 } | |
151 _header._jar[_header._num_jars]._timestamp = st.st_mtime; | |
152 _header._jar[_header._num_jars]._filesize = st.st_size; | |
153 _header._num_jars++; | |
154 } else { | |
155 | |
156 // If directories appear in boot classpath, they must be empty to | |
157 // avoid having to verify each individual class file. | |
158 const char* name = ((ClassPathDirEntry*)cpe)->name(); | |
159 if (!os::dir_is_empty(name)) { | |
160 fail_stop("Boot classpath directory %s is not empty.", name); | |
161 } | |
162 } | |
163 } | |
164 } | |
165 | |
166 | |
167 // Read the FileMapInfo information from the file. | |
168 | |
169 bool FileMapInfo::init_from_file(int fd) { | |
170 | |
171 size_t n = read(fd, &_header, sizeof(struct FileMapHeader)); | |
172 if (n != sizeof(struct FileMapHeader)) { | |
173 fail_continue("Unable to read the file header."); | |
174 return false; | |
175 } | |
176 if (_header._version != current_version()) { | |
177 fail_continue("The shared archive file has the wrong version."); | |
178 return false; | |
179 } | |
18096 | 180 size_t len = lseek(fd, 0, SEEK_END); |
181 struct FileMapInfo::FileMapHeader::space_info* si = | |
182 &_header._space[MetaspaceShared::mc]; | |
183 if (si->_file_offset >= len || len - si->_file_offset < si->_used) { | |
184 fail_continue("The shared archive file has been truncated."); | |
185 return false; | |
186 } | |
187 _file_offset = n; | |
0 | 188 return true; |
189 } | |
190 | |
191 | |
192 // Read the FileMapInfo information from the file. | |
193 bool FileMapInfo::open_for_read() { | |
194 _full_path = Arguments::GetSharedArchivePath(); | |
195 int fd = open(_full_path, O_RDONLY | O_BINARY, 0); | |
196 if (fd < 0) { | |
197 if (errno == ENOENT) { | |
198 // Not locating the shared archive is ok. | |
199 fail_continue("Specified shared archive not found."); | |
200 } else { | |
201 fail_continue("Failed to open shared archive file (%s).", | |
202 strerror(errno)); | |
203 } | |
204 return false; | |
205 } | |
206 | |
207 _fd = fd; | |
208 _file_open = true; | |
209 return true; | |
210 } | |
211 | |
212 | |
213 // Write the FileMapInfo information to the file. | |
214 | |
215 void FileMapInfo::open_for_write() { | |
216 _full_path = Arguments::GetSharedArchivePath(); | |
217 if (PrintSharedSpaces) { | |
218 tty->print_cr("Dumping shared data to file: "); | |
219 tty->print_cr(" %s", _full_path); | |
220 } | |
221 | |
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222 #ifdef _WINDOWS // On Windows, need WRITE permission to remove the file. |
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223 chmod(_full_path, _S_IREAD | _S_IWRITE); |
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224 #endif |
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225 |
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226 // Use remove() to delete the existing file because, on Unix, this will |
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227 // allow processes that have it open continued access to the file. |
0 | 228 remove(_full_path); |
229 int fd = open(_full_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0444); | |
230 if (fd < 0) { | |
231 fail_stop("Unable to create shared archive file %s.", _full_path); | |
232 } | |
233 _fd = fd; | |
234 _file_offset = 0; | |
235 _file_open = true; | |
236 } | |
237 | |
238 | |
239 // Write the header to the file, seek to the next allocation boundary. | |
240 | |
241 void FileMapInfo::write_header() { | |
242 write_bytes_aligned(&_header, sizeof(FileMapHeader)); | |
243 } | |
244 | |
245 | |
246 // Dump shared spaces to file. | |
247 | |
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248 void FileMapInfo::write_space(int i, Metaspace* space, bool read_only) { |
0 | 249 align_file_position(); |
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250 size_t used = space->used_bytes_slow(Metaspace::NonClassType); |
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251 size_t capacity = space->capacity_bytes_slow(Metaspace::NonClassType); |
0 | 252 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[i]; |
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253 write_region(i, (char*)space->bottom(), used, capacity, read_only, false); |
0 | 254 } |
255 | |
256 | |
257 // Dump region to file. | |
258 | |
259 void FileMapInfo::write_region(int region, char* base, size_t size, | |
260 size_t capacity, bool read_only, | |
261 bool allow_exec) { | |
262 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[region]; | |
263 | |
264 if (_file_open) { | |
265 guarantee(si->_file_offset == _file_offset, "file offset mismatch."); | |
266 if (PrintSharedSpaces) { | |
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267 tty->print_cr("Shared file region %d: 0x%6x bytes, addr " INTPTR_FORMAT |
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268 " file offset 0x%6x", region, size, base, _file_offset); |
0 | 269 } |
270 } else { | |
271 si->_file_offset = _file_offset; | |
272 } | |
273 si->_base = base; | |
274 si->_used = size; | |
275 si->_capacity = capacity; | |
276 si->_read_only = read_only; | |
277 si->_allow_exec = allow_exec; | |
18096 | 278 si->_crc = ClassLoader::crc32(0, base, (jint)size); |
0 | 279 write_bytes_aligned(base, (int)size); |
280 } | |
281 | |
282 | |
283 // Dump bytes to file -- at the current file position. | |
284 | |
285 void FileMapInfo::write_bytes(const void* buffer, int nbytes) { | |
286 if (_file_open) { | |
287 int n = ::write(_fd, buffer, nbytes); | |
288 if (n != nbytes) { | |
289 // It is dangerous to leave the corrupted shared archive file around, | |
290 // close and remove the file. See bug 6372906. | |
291 close(); | |
292 remove(_full_path); | |
293 fail_stop("Unable to write to shared archive file.", NULL); | |
294 } | |
295 } | |
296 _file_offset += nbytes; | |
297 } | |
298 | |
299 | |
300 // Align file position to an allocation unit boundary. | |
301 | |
302 void FileMapInfo::align_file_position() { | |
18096 | 303 size_t new_file_offset = align_size_up(_file_offset, |
304 os::vm_allocation_granularity()); | |
0 | 305 if (new_file_offset != _file_offset) { |
306 _file_offset = new_file_offset; | |
307 if (_file_open) { | |
308 // Seek one byte back from the target and write a byte to insure | |
309 // that the written file is the correct length. | |
310 _file_offset -= 1; | |
18096 | 311 if (lseek(_fd, (long)_file_offset, SEEK_SET) < 0) { |
0 | 312 fail_stop("Unable to seek.", NULL); |
313 } | |
314 char zero = 0; | |
315 write_bytes(&zero, 1); | |
316 } | |
317 } | |
318 } | |
319 | |
320 | |
321 // Dump bytes to file -- at the current file position. | |
322 | |
323 void FileMapInfo::write_bytes_aligned(const void* buffer, int nbytes) { | |
324 align_file_position(); | |
325 write_bytes(buffer, nbytes); | |
326 align_file_position(); | |
327 } | |
328 | |
329 | |
330 // Close the shared archive file. This does NOT unmap mapped regions. | |
331 | |
332 void FileMapInfo::close() { | |
333 if (_file_open) { | |
334 if (::close(_fd) < 0) { | |
335 fail_stop("Unable to close the shared archive file."); | |
336 } | |
337 _file_open = false; | |
338 _fd = -1; | |
339 } | |
340 } | |
341 | |
342 | |
343 // JVM/TI RedefineClasses() support: | |
344 // Remap the shared readonly space to shared readwrite, private. | |
345 bool FileMapInfo::remap_shared_readonly_as_readwrite() { | |
346 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[0]; | |
347 if (!si->_read_only) { | |
348 // the space is already readwrite so we are done | |
349 return true; | |
350 } | |
351 size_t used = si->_used; | |
352 size_t size = align_size_up(used, os::vm_allocation_granularity()); | |
353 if (!open_for_read()) { | |
354 return false; | |
355 } | |
356 char *base = os::remap_memory(_fd, _full_path, si->_file_offset, | |
357 si->_base, size, false /* !read_only */, | |
358 si->_allow_exec); | |
359 close(); | |
360 if (base == NULL) { | |
361 fail_continue("Unable to remap shared readonly space (errno=%d).", errno); | |
362 return false; | |
363 } | |
364 if (base != si->_base) { | |
365 fail_continue("Unable to remap shared readonly space at required address."); | |
366 return false; | |
367 } | |
368 si->_read_only = false; | |
369 return true; | |
370 } | |
371 | |
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372 // Map the whole region at once, assumed to be allocated contiguously. |
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373 ReservedSpace FileMapInfo::reserve_shared_memory() { |
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374 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[0]; |
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375 char* requested_addr = si->_base; |
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376 |
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377 size_t size = FileMapInfo::shared_spaces_size(); |
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378 |
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379 // Reserve the space first, then map otherwise map will go right over some |
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380 // other reserved memory (like the code cache). |
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381 ReservedSpace rs(size, os::vm_allocation_granularity(), false, requested_addr); |
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382 if (!rs.is_reserved()) { |
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383 fail_continue(err_msg("Unable to reserve shared space at required address " INTPTR_FORMAT, requested_addr)); |
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384 return rs; |
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385 } |
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386 // the reserved virtual memory is for mapping class data sharing archive |
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387 MemTracker::record_virtual_memory_type((address)rs.base(), mtClassShared); |
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388 |
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389 return rs; |
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390 } |
0 | 391 |
392 // Memory map a region in the address space. | |
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393 static const char* shared_region_name[] = { "ReadOnly", "ReadWrite", "MiscData", "MiscCode"}; |
0 | 394 |
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395 char* FileMapInfo::map_region(int i) { |
0 | 396 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[i]; |
397 size_t used = si->_used; | |
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398 size_t alignment = os::vm_allocation_granularity(); |
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399 size_t size = align_size_up(used, alignment); |
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400 char *requested_addr = si->_base; |
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401 |
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402 // map the contents of the CDS archive in this memory |
0 | 403 char *base = os::map_memory(_fd, _full_path, si->_file_offset, |
404 requested_addr, size, si->_read_only, | |
405 si->_allow_exec); | |
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406 if (base == NULL || base != si->_base) { |
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407 fail_continue(err_msg("Unable to map %s shared space at required address.", shared_region_name[i])); |
0 | 408 return NULL; |
409 } | |
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410 #ifdef _WINDOWS |
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411 // This call is Windows-only because the memory_type gets recorded for the other platforms |
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412 // in method FileMapInfo::reserve_shared_memory(), which is not called on Windows. |
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413 MemTracker::record_virtual_memory_type((address)base, mtClassShared); |
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414 #endif |
0 | 415 return base; |
416 } | |
417 | |
18096 | 418 bool FileMapInfo::verify_region_checksum(int i) { |
419 if (!VerifySharedSpaces) { | |
420 return true; | |
421 } | |
422 const char* buf = _header._space[i]._base; | |
423 size_t sz = _header._space[i]._used; | |
424 int crc = ClassLoader::crc32(0, buf, (jint)sz); | |
425 if (crc != _header._space[i]._crc) { | |
426 fail_continue("Checksum verification failed."); | |
427 return false; | |
428 } | |
429 return true; | |
430 } | |
0 | 431 |
432 // Unmap a memory region in the address space. | |
433 | |
434 void FileMapInfo::unmap_region(int i) { | |
435 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[i]; | |
436 size_t used = si->_used; | |
437 size_t size = align_size_up(used, os::vm_allocation_granularity()); | |
438 if (!os::unmap_memory(si->_base, size)) { | |
439 fail_stop("Unable to unmap shared space."); | |
440 } | |
441 } | |
442 | |
443 | |
444 void FileMapInfo::assert_mark(bool check) { | |
445 if (!check) { | |
446 fail_stop("Mark mismatch while restoring from shared file.", NULL); | |
447 } | |
448 } | |
449 | |
450 | |
451 FileMapInfo* FileMapInfo::_current_info = NULL; | |
452 | |
453 | |
454 // Open the shared archive file, read and validate the header | |
455 // information (version, boot classpath, etc.). If initialization | |
456 // fails, shared spaces are disabled and the file is closed. [See | |
457 // fail_continue.] | |
458 bool FileMapInfo::initialize() { | |
459 assert(UseSharedSpaces, "UseSharedSpaces expected."); | |
460 | |
461 if (JvmtiExport::can_modify_any_class() || JvmtiExport::can_walk_any_space()) { | |
462 fail_continue("Tool agent requires sharing to be disabled."); | |
463 return false; | |
464 } | |
465 | |
466 if (!open_for_read()) { | |
467 return false; | |
468 } | |
469 | |
470 init_from_file(_fd); | |
471 if (!validate()) { | |
472 return false; | |
473 } | |
474 | |
475 SharedReadOnlySize = _header._space[0]._capacity; | |
476 SharedReadWriteSize = _header._space[1]._capacity; | |
477 SharedMiscDataSize = _header._space[2]._capacity; | |
478 SharedMiscCodeSize = _header._space[3]._capacity; | |
479 return true; | |
480 } | |
481 | |
18096 | 482 int FileMapInfo::compute_header_crc() { |
483 char* header = (char*)&_header; | |
484 // start computing from the field after _crc | |
485 char* buf = (char*)&_header._crc + sizeof(int); | |
486 size_t sz = sizeof(FileMapInfo::FileMapHeader) - (buf - header); | |
487 int crc = ClassLoader::crc32(0, buf, (jint)sz); | |
488 return crc; | |
489 } | |
0 | 490 |
491 bool FileMapInfo::validate() { | |
18096 | 492 if (VerifySharedSpaces && compute_header_crc() != _header._crc) { |
493 fail_continue("Header checksum verification failed."); | |
494 return false; | |
495 } | |
0 | 496 if (_header._version != current_version()) { |
497 fail_continue("The shared archive file is the wrong version."); | |
498 return false; | |
499 } | |
500 if (_header._magic != (int)0xf00baba2) { | |
501 fail_continue("The shared archive file has a bad magic number."); | |
502 return false; | |
503 } | |
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504 char header_version[JVM_IDENT_MAX]; |
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505 get_header_version(header_version); |
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506 if (strncmp(_header._jvm_ident, header_version, JVM_IDENT_MAX-1) != 0) { |
0 | 507 fail_continue("The shared archive file was created by a different" |
508 " version or build of HotSpot."); | |
509 return false; | |
510 } | |
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511 if (_header._obj_alignment != ObjectAlignmentInBytes) { |
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512 fail_continue("The shared archive file's ObjectAlignmentInBytes of %d" |
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513 " does not equal the current ObjectAlignmentInBytes of %d.", |
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514 _header._obj_alignment, ObjectAlignmentInBytes); |
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515 return false; |
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516 } |
0 | 517 |
518 // Cannot verify interpreter yet, as it can only be created after the GC | |
519 // heap has been initialized. | |
520 | |
521 if (_header._num_jars >= JVM_SHARED_JARS_MAX) { | |
522 fail_continue("Too many jar files to share."); | |
523 return false; | |
524 } | |
525 | |
526 // Build checks on classpath and jar files | |
527 int num_jars_now = 0; | |
528 ClassPathEntry *cpe = ClassLoader::classpath_entry(0); | |
529 for ( ; cpe != NULL; cpe = cpe->next()) { | |
530 | |
531 if (cpe->is_jar_file()) { | |
532 if (num_jars_now < _header._num_jars) { | |
533 | |
534 // Jar file - verify timestamp and file size. | |
535 struct stat st; | |
536 const char *path = cpe->name(); | |
537 if (os::stat(path, &st) != 0) { | |
538 fail_continue("Unable to open jar file %s.", path); | |
539 return false; | |
540 } | |
541 if (_header._jar[num_jars_now]._timestamp != st.st_mtime || | |
542 _header._jar[num_jars_now]._filesize != st.st_size) { | |
543 fail_continue("A jar file is not the one used while building" | |
544 " the shared archive file."); | |
545 return false; | |
546 } | |
547 } | |
548 ++num_jars_now; | |
549 } else { | |
550 | |
551 // If directories appear in boot classpath, they must be empty to | |
552 // avoid having to verify each individual class file. | |
553 const char* name = ((ClassPathDirEntry*)cpe)->name(); | |
554 if (!os::dir_is_empty(name)) { | |
555 fail_continue("Boot classpath directory %s is not empty.", name); | |
556 return false; | |
557 } | |
558 } | |
559 } | |
560 if (num_jars_now < _header._num_jars) { | |
561 fail_continue("The number of jar files in the boot classpath is" | |
562 " less than the number the shared archive was created with."); | |
563 return false; | |
564 } | |
565 | |
566 return true; | |
567 } | |
568 | |
569 // The following method is provided to see whether a given pointer | |
570 // falls in the mapped shared space. | |
571 // Param: | |
572 // p, The given pointer | |
573 // Return: | |
574 // True if the p is within the mapped shared space, otherwise, false. | |
575 bool FileMapInfo::is_in_shared_space(const void* p) { | |
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576 for (int i = 0; i < MetaspaceShared::n_regions; i++) { |
0 | 577 if (p >= _header._space[i]._base && |
578 p < _header._space[i]._base + _header._space[i]._used) { | |
579 return true; | |
580 } | |
581 } | |
582 | |
583 return false; | |
584 } | |
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585 |
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586 void FileMapInfo::print_shared_spaces() { |
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587 gclog_or_tty->print_cr("Shared Spaces:"); |
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588 for (int i = 0; i < MetaspaceShared::n_regions; i++) { |
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589 struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[i]; |
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590 gclog_or_tty->print(" %s " INTPTR_FORMAT "-" INTPTR_FORMAT, |
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591 shared_region_name[i], |
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592 si->_base, si->_base + si->_used); |
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593 } |
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594 } |
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595 |
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596 // Unmap mapped regions of shared space. |
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597 void FileMapInfo::stop_sharing_and_unmap(const char* msg) { |
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598 FileMapInfo *map_info = FileMapInfo::current_info(); |
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599 if (map_info) { |
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600 map_info->fail_continue(msg); |
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601 for (int i = 0; i < MetaspaceShared::n_regions; i++) { |
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602 if (map_info->_header._space[i]._base != NULL) { |
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603 map_info->unmap_region(i); |
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604 map_info->_header._space[i]._base = NULL; |
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605 } |
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606 } |
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607 } else if (DumpSharedSpaces) { |
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608 fail_stop(msg, NULL); |
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609 } |
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610 } |