1 /*
2 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/classLoader.inline.hpp"
28 #include "classfile/classLoaderExt.hpp"
29 #include "classfile/compactHashtable.inline.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/systemDictionaryShared.hpp"
33 #include "classfile/altHashing.hpp"
34 #include "logging/log.hpp"
35 #include "logging/logStream.hpp"
36 #include "logging/logMessage.hpp"
37 #include "memory/filemap.hpp"
38 #include "memory/metadataFactory.hpp"
39 #include "memory/metaspaceClosure.hpp"
40 #include "memory/metaspaceShared.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "oops/compressedOops.inline.hpp"
43 #include "oops/objArrayOop.hpp"
44 #include "prims/jvmtiExport.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/java.hpp"
47 #include "runtime/os.hpp"
48 #include "runtime/vm_version.hpp"
49 #include "services/memTracker.hpp"
50 #include "utilities/align.hpp"
51 #include "utilities/defaultStream.hpp"
52 #if INCLUDE_G1GC
53 #include "gc/g1/g1CollectedHeap.hpp"
54 #endif
55
56 # include <sys/stat.h>
57 # include <errno.h>
58
59 #ifndef O_BINARY // if defined (Win32) use binary files.
60 #define O_BINARY 0 // otherwise do nothing.
61 #endif
62
63 extern address JVM_FunctionAtStart();
64 extern address JVM_FunctionAtEnd();
65
66 // Complain and stop. All error conditions occurring during the writing of
67 // an archive file should stop the process. Unrecoverable errors during
68 // the reading of the archive file should stop the process.
69
70 static void fail(const char *msg, va_list ap) {
71 // This occurs very early during initialization: tty is not initialized.
72 jio_fprintf(defaultStream::error_stream(),
73 "An error has occurred while processing the"
74 " shared archive file.\n");
75 jio_vfprintf(defaultStream::error_stream(), msg, ap);
76 jio_fprintf(defaultStream::error_stream(), "\n");
77 // Do not change the text of the below message because some tests check for it.
78 vm_exit_during_initialization("Unable to use shared archive.", NULL);
79 }
80
81
82 void FileMapInfo::fail_stop(const char *msg, ...) {
83 va_list ap;
84 va_start(ap, msg);
85 fail(msg, ap); // Never returns.
86 va_end(ap); // for completeness.
87 }
88
89
90 // Complain and continue. Recoverable errors during the reading of the
91 // archive file may continue (with sharing disabled).
92 //
93 // If we continue, then disable shared spaces and close the file.
94
95 void FileMapInfo::fail_continue(const char *msg, ...) {
96 va_list ap;
97 va_start(ap, msg);
98 MetaspaceShared::set_archive_loading_failed();
99 if (PrintSharedArchiveAndExit && _validating_shared_path_table) {
100 // If we are doing PrintSharedArchiveAndExit and some of the classpath entries
101 // do not validate, we can still continue "limping" to validate the remaining
102 // entries. No need to quit.
103 tty->print("[");
104 tty->vprint(msg, ap);
105 tty->print_cr("]");
106 } else {
107 if (RequireSharedSpaces) {
108 fail(msg, ap);
109 } else {
110 if (log_is_enabled(Info, cds)) {
111 ResourceMark rm;
112 LogStream ls(Log(cds)::info());
113 ls.print("UseSharedSpaces: ");
114 ls.vprint_cr(msg, ap);
115 }
116 }
117 UseSharedSpaces = false;
118 assert(current_info() != NULL, "singleton must be registered");
119 current_info()->close();
120 }
121 va_end(ap);
122 }
123
124 // Fill in the fileMapInfo structure with data about this VM instance.
125
126 // This method copies the vm version info into header_version. If the version is too
127 // long then a truncated version, which has a hash code appended to it, is copied.
128 //
129 // Using a template enables this method to verify that header_version is an array of
130 // length JVM_IDENT_MAX. This ensures that the code that writes to the CDS file and
131 // the code that reads the CDS file will both use the same size buffer. Hence, will
132 // use identical truncation. This is necessary for matching of truncated versions.
133 template <int N> static void get_header_version(char (&header_version) [N]) {
134 assert(N == JVM_IDENT_MAX, "Bad header_version size");
135
136 const char *vm_version = VM_Version::internal_vm_info_string();
137 const int version_len = (int)strlen(vm_version);
138
139 if (version_len < (JVM_IDENT_MAX-1)) {
140 strcpy(header_version, vm_version);
141
142 } else {
143 // Get the hash value. Use a static seed because the hash needs to return the same
144 // value over multiple jvm invocations.
145 unsigned int hash = AltHashing::murmur3_32(8191, (const jbyte*)vm_version, version_len);
146
147 // Truncate the ident, saving room for the 8 hex character hash value.
148 strncpy(header_version, vm_version, JVM_IDENT_MAX-9);
149
150 // Append the hash code as eight hex digits.
151 sprintf(&header_version[JVM_IDENT_MAX-9], "%08x", hash);
152 header_version[JVM_IDENT_MAX-1] = 0; // Null terminate.
153 }
154 }
155
156 FileMapInfo::FileMapInfo() {
157 assert(_current_info == NULL, "must be singleton"); // not thread safe
158 _current_info = this;
159 memset((void*)this, 0, sizeof(FileMapInfo));
160 _file_offset = 0;
161 _file_open = false;
162 _header = new FileMapHeader();
163 _header->_version = _invalid_version;
164 _header->_has_platform_or_app_classes = true;
165 }
166
167 FileMapInfo::~FileMapInfo() {
168 assert(_current_info == this, "must be singleton"); // not thread safe
169 _current_info = NULL;
170 }
171
172 void FileMapInfo::populate_header(size_t alignment) {
173 _header->populate(this, alignment);
174 }
175
176 void FileMapInfo::FileMapHeader::populate(FileMapInfo* mapinfo, size_t alignment) {
177 _magic = 0xf00baba2;
178 _version = _current_version;
179 _alignment = alignment;
180 _obj_alignment = ObjectAlignmentInBytes;
181 _compact_strings = CompactStrings;
182 _narrow_oop_mode = Universe::narrow_oop_mode();
183 _narrow_oop_base = Universe::narrow_oop_base();
184 _narrow_oop_shift = Universe::narrow_oop_shift();
185 _max_heap_size = MaxHeapSize;
186 _narrow_klass_base = Universe::narrow_klass_base();
187 _narrow_klass_shift = Universe::narrow_klass_shift();
188 _shared_path_table_size = mapinfo->_shared_path_table_size;
189 _shared_path_table = mapinfo->_shared_path_table;
190 _shared_path_entry_size = mapinfo->_shared_path_entry_size;
191
192 // The following fields are for sanity checks for whether this archive
193 // will function correctly with this JVM and the bootclasspath it's
194 // invoked with.
195
196 // JVM version string ... changes on each build.
197 get_header_version(_jvm_ident);
198
199 ClassLoaderExt::finalize_shared_paths_misc_info();
200 _app_class_paths_start_index = ClassLoaderExt::app_class_paths_start_index();
201 _app_module_paths_start_index = ClassLoaderExt::app_module_paths_start_index();
202 _max_used_path_index = ClassLoaderExt::max_used_path_index();
203
204 _verify_local = BytecodeVerificationLocal;
205 _verify_remote = BytecodeVerificationRemote;
206 _has_platform_or_app_classes = ClassLoaderExt::has_platform_or_app_classes();
207 }
208
209 void SharedClassPathEntry::init(const char* name, bool is_modules_image, TRAPS) {
210 assert(DumpSharedSpaces, "dump time only");
211 _timestamp = 0;
212 _filesize = 0;
213
214 struct stat st;
215 if (os::stat(name, &st) == 0) {
216 if ((st.st_mode & S_IFMT) == S_IFDIR) {
217 _type = dir_entry;
218 } else {
219 // The timestamp of the modules_image is not checked at runtime.
220 if (is_modules_image) {
221 _type = modules_image_entry;
222 } else {
223 _type = jar_entry;
224 _timestamp = st.st_mtime;
225 }
226 _filesize = st.st_size;
227 }
228 } else {
229 // The file/dir must exist, or it would not have been added
230 // into ClassLoader::classpath_entry().
231 //
232 // If we can't access a jar file in the boot path, then we can't
233 // make assumptions about where classes get loaded from.
234 FileMapInfo::fail_stop("Unable to open file %s.", name);
235 }
236
237 size_t len = strlen(name) + 1;
238 _name = MetadataFactory::new_array<char>(ClassLoaderData::the_null_class_loader_data(), (int)len, THREAD);
239 strcpy(_name->data(), name);
240 }
241
242 bool SharedClassPathEntry::validate(bool is_class_path) {
243 assert(UseSharedSpaces, "runtime only");
244
245 struct stat st;
246 const char* name;
247
248 // In order to validate the runtime modules image file size against the archived
249 // size information, we need to obtain the runtime modules image path. The recorded
250 // dump time modules image path in the archive may be different from the runtime path
251 // if the JDK image has beed moved after generating the archive.
252 if (is_modules_image()) {
253 name = ClassLoader::get_jrt_entry()->name();
254 } else {
255 name = this->name();
256 }
257
258 bool ok = true;
259 log_info(class, path)("checking shared classpath entry: %s", name);
260 if (os::stat(name, &st) != 0 && is_class_path) {
261 // If the archived module path entry does not exist at runtime, it is not fatal
262 // (no need to invalid the shared archive) because the shared runtime visibility check
263 // filters out any archived module classes that do not have a matching runtime
264 // module path location.
265 FileMapInfo::fail_continue("Required classpath entry does not exist: %s", name);
266 ok = false;
267 } else if (is_dir()) {
268 if (!os::dir_is_empty(name)) {
269 FileMapInfo::fail_continue("directory is not empty: %s", name);
270 ok = false;
271 }
272 } else if ((has_timestamp() && _timestamp != st.st_mtime) ||
273 _filesize != st.st_size) {
274 ok = false;
275 if (PrintSharedArchiveAndExit) {
276 FileMapInfo::fail_continue(_timestamp != st.st_mtime ?
277 "Timestamp mismatch" :
278 "File size mismatch");
279 } else {
280 FileMapInfo::fail_continue("A jar file is not the one used while building"
281 " the shared archive file: %s", name);
282 }
283 }
284 return ok;
285 }
286
287 void SharedClassPathEntry::metaspace_pointers_do(MetaspaceClosure* it) {
288 it->push(&_name);
289 it->push(&_manifest);
290 }
291
292 void FileMapInfo::allocate_shared_path_table() {
293 assert(DumpSharedSpaces, "Sanity");
294
295 Thread* THREAD = Thread::current();
296 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
297 ClassPathEntry* jrt = ClassLoader::get_jrt_entry();
298
299 assert(jrt != NULL,
300 "No modular java runtime image present when allocating the CDS classpath entry table");
301
302 size_t entry_size = sizeof(SharedClassPathEntry); // assert ( should be 8 byte aligned??)
303 int num_boot_classpath_entries = ClassLoader::num_boot_classpath_entries();
304 int num_app_classpath_entries = ClassLoader::num_app_classpath_entries();
305 int num_module_path_entries = ClassLoader::num_module_path_entries();
306 int num_entries = num_boot_classpath_entries + num_app_classpath_entries + num_module_path_entries;
307 size_t bytes = entry_size * num_entries;
308
309 _shared_path_table = MetadataFactory::new_array<u8>(loader_data, (int)(bytes + 7 / 8), THREAD);
310 _shared_path_table_size = num_entries;
311 _shared_path_entry_size = entry_size;
312
313 // 1. boot class path
314 int i = 0;
315 ClassPathEntry* cpe = jrt;
316 while (cpe != NULL) {
317 bool is_jrt = (cpe == jrt);
318 const char* type = (is_jrt ? "jrt" : (cpe->is_jar_file() ? "jar" : "dir"));
319 log_info(class, path)("add main shared path (%s) %s", type, cpe->name());
320 SharedClassPathEntry* ent = shared_path(i);
321 ent->init(cpe->name(), is_jrt, THREAD);
322 if (!is_jrt) { // No need to do the modules image.
323 EXCEPTION_MARK; // The following call should never throw, but would exit VM on error.
324 update_shared_classpath(cpe, ent, THREAD);
325 }
326 cpe = ClassLoader::get_next_boot_classpath_entry(cpe);
327 i++;
328 }
329 assert(i == num_boot_classpath_entries,
330 "number of boot class path entry mismatch");
331
332 // 2. app class path
333 ClassPathEntry *acpe = ClassLoader::app_classpath_entries();
334 while (acpe != NULL) {
335 log_info(class, path)("add app shared path %s", acpe->name());
336 SharedClassPathEntry* ent = shared_path(i);
337 ent->init(acpe->name(), false, THREAD);
338 EXCEPTION_MARK;
339 update_shared_classpath(acpe, ent, THREAD);
340 acpe = acpe->next();
341 i++;
342 }
343
344 // 3. module path
345 ClassPathEntry *mpe = ClassLoader::module_path_entries();
346 while (mpe != NULL) {
347 log_info(class, path)("add module path %s",mpe->name());
348 SharedClassPathEntry* ent = shared_path(i);
349 ent->init(mpe->name(), false, THREAD);
350 EXCEPTION_MARK;
351 update_shared_classpath(mpe, ent, THREAD);
352 mpe = mpe->next();
353 i++;
354 }
355 assert(i == num_entries, "number of shared path entry mismatch");
356 }
357
358 void FileMapInfo::check_nonempty_dir_in_shared_path_table() {
359 assert(DumpSharedSpaces, "dump time only");
360
361 bool has_nonempty_dir = false;
362
363 int last = _shared_path_table_size - 1;
364 if (last > ClassLoaderExt::max_used_path_index()) {
365 // no need to check any path beyond max_used_path_index
366 last = ClassLoaderExt::max_used_path_index();
367 }
368
369 for (int i = 0; i <= last; i++) {
370 SharedClassPathEntry *e = shared_path(i);
371 if (e->is_dir()) {
372 const char* path = e->name();
373 if (!os::dir_is_empty(path)) {
374 tty->print_cr("Error: non-empty directory '%s'", path);
375 has_nonempty_dir = true;
376 }
377 }
378 }
379
380 if (has_nonempty_dir) {
381 ClassLoader::exit_with_path_failure("Cannot have non-empty directory in paths", NULL);
382 }
383 }
384
385 class ManifestStream: public ResourceObj {
386 private:
387 u1* _buffer_start; // Buffer bottom
388 u1* _buffer_end; // Buffer top (one past last element)
389 u1* _current; // Current buffer position
390
391 public:
392 // Constructor
393 ManifestStream(u1* buffer, int length) : _buffer_start(buffer),
394 _current(buffer) {
395 _buffer_end = buffer + length;
396 }
397
398 static bool is_attr(u1* attr, const char* name) {
399 return strncmp((const char*)attr, name, strlen(name)) == 0;
400 }
401
402 static char* copy_attr(u1* value, size_t len) {
403 char* buf = NEW_RESOURCE_ARRAY(char, len + 1);
404 strncpy(buf, (char*)value, len);
405 buf[len] = 0;
406 return buf;
407 }
408
409 // The return value indicates if the JAR is signed or not
410 bool check_is_signed() {
411 u1* attr = _current;
412 bool isSigned = false;
413 while (_current < _buffer_end) {
414 if (*_current == '\n') {
415 *_current = '\0';
416 u1* value = (u1*)strchr((char*)attr, ':');
417 if (value != NULL) {
418 assert(*(value+1) == ' ', "Unrecognized format" );
419 if (strstr((char*)attr, "-Digest") != NULL) {
420 isSigned = true;
421 break;
422 }
423 }
424 *_current = '\n'; // restore
425 attr = _current + 1;
426 }
427 _current ++;
428 }
429 return isSigned;
430 }
431 };
432
433 void FileMapInfo::update_shared_classpath(ClassPathEntry *cpe, SharedClassPathEntry* ent, TRAPS) {
434 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
435 ResourceMark rm(THREAD);
436 jint manifest_size;
437
438 if (cpe->is_jar_file()) {
439 assert(ent->is_jar(), "the shared class path entry is not a JAR file");
440 char* manifest = ClassLoaderExt::read_manifest(cpe, &manifest_size, CHECK);
441 if (manifest != NULL) {
442 ManifestStream* stream = new ManifestStream((u1*)manifest,
443 manifest_size);
444 if (stream->check_is_signed()) {
445 ent->set_is_signed();
446 } else {
447 // Copy the manifest into the shared archive
448 manifest = ClassLoaderExt::read_raw_manifest(cpe, &manifest_size, CHECK);
449 Array<u1>* buf = MetadataFactory::new_array<u1>(loader_data,
450 manifest_size,
451 THREAD);
452 char* p = (char*)(buf->data());
453 memcpy(p, manifest, manifest_size);
454 ent->set_manifest(buf);
455 }
456 }
457 }
458 }
459
460
461 bool FileMapInfo::validate_shared_path_table() {
462 assert(UseSharedSpaces, "runtime only");
463
464 _validating_shared_path_table = true;
465 _shared_path_table = _header->_shared_path_table;
466 _shared_path_entry_size = _header->_shared_path_entry_size;
467 _shared_path_table_size = _header->_shared_path_table_size;
468
469 int module_paths_start_index = _header->_app_module_paths_start_index;
470
471 // validate the path entries up to the _max_used_path_index
472 for (int i=0; i < _header->_max_used_path_index + 1; i++) {
473 if (i < module_paths_start_index) {
474 if (shared_path(i)->validate()) {
475 log_info(class, path)("ok");
476 }
477 } else if (i >= module_paths_start_index) {
478 if (shared_path(i)->validate(false /* not a class path entry */)) {
479 log_info(class, path)("ok");
480 }
481 } else if (!PrintSharedArchiveAndExit) {
482 _validating_shared_path_table = false;
483 _shared_path_table = NULL;
484 _shared_path_table_size = 0;
485 return false;
486 }
487 }
488
489 _validating_shared_path_table = false;
490 return true;
491 }
492
493 // Read the FileMapInfo information from the file.
494
495 bool FileMapInfo::init_from_file(int fd) {
496 size_t sz = _header->data_size();
497 char* addr = _header->data();
498 size_t n = os::read(fd, addr, (unsigned int)sz);
499 if (n != sz) {
500 fail_continue("Unable to read the file header.");
501 return false;
502 }
503 if (_header->_version != current_version()) {
504 fail_continue("The shared archive file has the wrong version.");
505 return false;
506 }
507 _file_offset = (long)n;
508
509 size_t info_size = _header->_paths_misc_info_size;
510 _paths_misc_info = NEW_C_HEAP_ARRAY_RETURN_NULL(char, info_size, mtClass);
511 if (_paths_misc_info == NULL) {
512 fail_continue("Unable to read the file header.");
513 return false;
514 }
515 n = os::read(fd, _paths_misc_info, (unsigned int)info_size);
516 if (n != info_size) {
517 fail_continue("Unable to read the shared path info header.");
518 FREE_C_HEAP_ARRAY(char, _paths_misc_info);
519 _paths_misc_info = NULL;
520 return false;
521 }
522
523 size_t len = lseek(fd, 0, SEEK_END);
524 struct FileMapInfo::FileMapHeader::space_info* si =
525 &_header->_space[MetaspaceShared::last_valid_region];
526 // The last space might be empty
527 if (si->_file_offset > len || len - si->_file_offset < si->_used) {
528 fail_continue("The shared archive file has been truncated.");
529 return false;
530 }
531
532 _file_offset += (long)n;
533 return true;
534 }
535
536
537 // Read the FileMapInfo information from the file.
538 bool FileMapInfo::open_for_read() {
539 _full_path = Arguments::GetSharedArchivePath();
540 int fd = os::open(_full_path, O_RDONLY | O_BINARY, 0);
541 if (fd < 0) {
542 if (errno == ENOENT) {
543 // Not locating the shared archive is ok.
544 fail_continue("Specified shared archive not found.");
545 } else {
546 fail_continue("Failed to open shared archive file (%s).",
547 os::strerror(errno));
548 }
549 return false;
550 }
551
552 _fd = fd;
553 _file_open = true;
554 return true;
555 }
556
557
558 // Write the FileMapInfo information to the file.
559
560 void FileMapInfo::open_for_write() {
561 _full_path = Arguments::GetSharedArchivePath();
562 LogMessage(cds) msg;
563 if (msg.is_info()) {
564 msg.info("Dumping shared data to file: ");
565 msg.info(" %s", _full_path);
566 }
567
568 #ifdef _WINDOWS // On Windows, need WRITE permission to remove the file.
569 chmod(_full_path, _S_IREAD | _S_IWRITE);
570 #endif
571
572 // Use remove() to delete the existing file because, on Unix, this will
573 // allow processes that have it open continued access to the file.
574 remove(_full_path);
575 int fd = os::open(_full_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0444);
576 if (fd < 0) {
577 fail_stop("Unable to create shared archive file %s: (%s).", _full_path,
578 os::strerror(errno));
579 }
580 _fd = fd;
581 _file_offset = 0;
582 _file_open = true;
583 }
584
585
586 // Write the header to the file, seek to the next allocation boundary.
587
588 void FileMapInfo::write_header() {
589 int info_size = ClassLoader::get_shared_paths_misc_info_size();
590
591 _header->_paths_misc_info_size = info_size;
592
593 align_file_position();
594 size_t sz = _header->data_size();
595 char* addr = _header->data();
596 write_bytes(addr, (int)sz); // skip the C++ vtable
597 write_bytes(ClassLoader::get_shared_paths_misc_info(), info_size);
598 align_file_position();
599 }
600
601
602 // Dump region to file.
603
604 void FileMapInfo::write_region(int region, char* base, size_t size,
605 bool read_only, bool allow_exec) {
606 struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[region];
607
608 if (_file_open) {
609 guarantee(si->_file_offset == _file_offset, "file offset mismatch.");
610 log_info(cds)("Shared file region %d: " SIZE_FORMAT_HEX_W(08)
611 " bytes, addr " INTPTR_FORMAT " file offset " SIZE_FORMAT_HEX_W(08),
612 region, size, p2i(base), _file_offset);
613 } else {
614 si->_file_offset = _file_offset;
615 }
616 if (MetaspaceShared::is_heap_region(region)) {
617 assert((base - (char*)Universe::narrow_oop_base()) % HeapWordSize == 0, "Sanity");
618 if (base != NULL) {
619 si->_addr._offset = (intx)CompressedOops::encode_not_null((oop)base);
620 } else {
621 si->_addr._offset = 0;
622 }
623 } else {
624 si->_addr._base = base;
625 }
626 si->_used = size;
627 si->_read_only = read_only;
628 si->_allow_exec = allow_exec;
629 si->_crc = ClassLoader::crc32(0, base, (jint)size);
630 if (base != NULL) {
631 write_bytes_aligned(base, (int)size);
632 }
633 }
634
635 // Write out the given archive heap memory regions. GC code combines multiple
636 // consecutive archive GC regions into one MemRegion whenever possible and
637 // produces the 'heap_mem' array.
638 //
639 // If the archive heap memory size is smaller than a single dump time GC region
640 // size, there is only one MemRegion in the array.
641 //
642 // If the archive heap memory size is bigger than one dump time GC region size,
643 // the 'heap_mem' array may contain more than one consolidated MemRegions. When
644 // the first/bottom archive GC region is a partial GC region (with the empty
645 // portion at the higher address within the region), one MemRegion is used for
646 // the bottom partial archive GC region. The rest of the consecutive archive
647 // GC regions are combined into another MemRegion.
648 //
649 // Here's the mapping from (archive heap GC regions) -> (GrowableArray<MemRegion> *regions).
650 // + We have 1 or more archive heap regions: ah0, ah1, ah2 ..... ahn
651 // + We have 1 or 2 consolidated heap memory regions: r0 and r1
652 //
653 // If there's a single archive GC region (ah0), then r0 == ah0, and r1 is empty.
654 // Otherwise:
655 //
656 // "X" represented space that's occupied by heap objects.
657 // "_" represented unused spaced in the heap region.
658 //
659 //
660 // |ah0 | ah1 | ah2| ...... | ahn |
661 // |XXXXXX|__ |XXXXX|XXXX|XXXXXXXX|XXXX|
662 // |<-r0->| |<- r1 ----------------->|
663 // ^^^
664 // |
665 // +-- gap
666 size_t FileMapInfo::write_archive_heap_regions(GrowableArray<MemRegion> *heap_mem,
667 int first_region_id, int max_num_regions) {
668 assert(max_num_regions <= 2, "Only support maximum 2 memory regions");
669
670 int arr_len = heap_mem == NULL ? 0 : heap_mem->length();
671 if(arr_len > max_num_regions) {
672 fail_stop("Unable to write archive heap memory regions: "
673 "number of memory regions exceeds maximum due to fragmentation");
674 }
675
676 size_t total_size = 0;
677 for (int i = first_region_id, arr_idx = 0;
678 i < first_region_id + max_num_regions;
679 i++, arr_idx++) {
680 char* start = NULL;
681 size_t size = 0;
682 if (arr_idx < arr_len) {
683 start = (char*)heap_mem->at(arr_idx).start();
684 size = heap_mem->at(arr_idx).byte_size();
685 total_size += size;
686 }
687
688 log_info(cds)("Archive heap region %d " INTPTR_FORMAT " - " INTPTR_FORMAT " = " SIZE_FORMAT_W(8) " bytes",
689 i, p2i(start), p2i(start + size), size);
690 write_region(i, start, size, false, false);
691 }
692 return total_size;
693 }
694
695 // Dump bytes to file -- at the current file position.
696
697 void FileMapInfo::write_bytes(const void* buffer, int nbytes) {
698 if (_file_open) {
699 int n = ::write(_fd, buffer, nbytes);
700 if (n != nbytes) {
701 // It is dangerous to leave the corrupted shared archive file around,
702 // close and remove the file. See bug 6372906.
703 close();
704 remove(_full_path);
705 fail_stop("Unable to write to shared archive file.");
706 }
707 }
708 _file_offset += nbytes;
709 }
710
711
712 // Align file position to an allocation unit boundary.
713
714 void FileMapInfo::align_file_position() {
715 size_t new_file_offset = align_up(_file_offset,
716 os::vm_allocation_granularity());
717 if (new_file_offset != _file_offset) {
718 _file_offset = new_file_offset;
719 if (_file_open) {
720 // Seek one byte back from the target and write a byte to insure
721 // that the written file is the correct length.
722 _file_offset -= 1;
723 if (lseek(_fd, (long)_file_offset, SEEK_SET) < 0) {
724 fail_stop("Unable to seek.");
725 }
726 char zero = 0;
727 write_bytes(&zero, 1);
728 }
729 }
730 }
731
732
733 // Dump bytes to file -- at the current file position.
734
735 void FileMapInfo::write_bytes_aligned(const void* buffer, int nbytes) {
736 align_file_position();
737 write_bytes(buffer, nbytes);
738 align_file_position();
739 }
740
741
742 // Close the shared archive file. This does NOT unmap mapped regions.
743
744 void FileMapInfo::close() {
745 if (_file_open) {
746 if (::close(_fd) < 0) {
747 fail_stop("Unable to close the shared archive file.");
748 }
749 _file_open = false;
750 _fd = -1;
751 }
752 }
753
754
755 // JVM/TI RedefineClasses() support:
756 // Remap the shared readonly space to shared readwrite, private.
757 bool FileMapInfo::remap_shared_readonly_as_readwrite() {
758 int idx = MetaspaceShared::ro;
759 struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[idx];
760 if (!si->_read_only) {
761 // the space is already readwrite so we are done
762 return true;
763 }
764 size_t used = si->_used;
765 size_t size = align_up(used, os::vm_allocation_granularity());
766 if (!open_for_read()) {
767 return false;
768 }
769 char *addr = _header->region_addr(idx);
770 char *base = os::remap_memory(_fd, _full_path, si->_file_offset,
771 addr, size, false /* !read_only */,
772 si->_allow_exec);
773 close();
774 if (base == NULL) {
775 fail_continue("Unable to remap shared readonly space (errno=%d).", errno);
776 return false;
777 }
778 if (base != addr) {
779 fail_continue("Unable to remap shared readonly space at required address.");
780 return false;
781 }
782 si->_read_only = false;
783 return true;
784 }
785
786 // Map the whole region at once, assumed to be allocated contiguously.
787 ReservedSpace FileMapInfo::reserve_shared_memory() {
788 char* requested_addr = _header->region_addr(0);
789 size_t size = FileMapInfo::core_spaces_size();
790
791 // Reserve the space first, then map otherwise map will go right over some
792 // other reserved memory (like the code cache).
793 ReservedSpace rs(size, os::vm_allocation_granularity(), false, requested_addr);
794 if (!rs.is_reserved()) {
795 fail_continue("Unable to reserve shared space at required address "
796 INTPTR_FORMAT, p2i(requested_addr));
797 return rs;
798 }
799 // the reserved virtual memory is for mapping class data sharing archive
800 MemTracker::record_virtual_memory_type((address)rs.base(), mtClassShared);
801
802 return rs;
803 }
804
805 // Memory map a region in the address space.
806 static const char* shared_region_name[] = { "MiscData", "ReadWrite", "ReadOnly", "MiscCode", "OptionalData",
807 "String1", "String2", "OpenArchive1", "OpenArchive2" };
808
809 char* FileMapInfo::map_region(int i, char** top_ret) {
810 assert(!MetaspaceShared::is_heap_region(i), "sanity");
811 struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[i];
812 size_t used = si->_used;
813 size_t alignment = os::vm_allocation_granularity();
814 size_t size = align_up(used, alignment);
815 char *requested_addr = _header->region_addr(i);
816
817 // If a tool agent is in use (debugging enabled), we must map the address space RW
818 if (JvmtiExport::can_modify_any_class() || JvmtiExport::can_walk_any_space()) {
819 si->_read_only = false;
820 }
821
822 // map the contents of the CDS archive in this memory
823 char *base = os::map_memory(_fd, _full_path, si->_file_offset,
824 requested_addr, size, si->_read_only,
825 si->_allow_exec);
826 if (base == NULL || base != requested_addr) {
827 fail_continue("Unable to map %s shared space at required address.", shared_region_name[i]);
828 return NULL;
829 }
830 #ifdef _WINDOWS
831 // This call is Windows-only because the memory_type gets recorded for the other platforms
832 // in method FileMapInfo::reserve_shared_memory(), which is not called on Windows.
833 MemTracker::record_virtual_memory_type((address)base, mtClassShared);
834 #endif
835
836
837 if (!verify_region_checksum(i)) {
838 return NULL;
839 }
840
841 *top_ret = base + size;
842 return base;
843 }
844
845 static MemRegion *string_ranges = NULL;
846 static MemRegion *open_archive_heap_ranges = NULL;
847 static int num_string_ranges = 0;
848 static int num_open_archive_heap_ranges = 0;
849
850 #if INCLUDE_CDS_JAVA_HEAP
851 //
852 // Map the shared string objects and open archive heap objects to the runtime
853 // java heap.
854 //
855 // The shared strings are mapped near the runtime java heap top. The
856 // mapped strings contain no out-going references to any other java heap
857 // regions. GC does not write into the mapped shared strings.
858 //
859 // The open archive heap objects are mapped below the shared strings in
860 // the runtime java heap. The mapped open archive heap data only contain
861 // references to the shared strings and open archive objects initially.
862 // During runtime execution, out-going references to any other java heap
863 // regions may be added. GC may mark and update references in the mapped
864 // open archive objects.
865 void FileMapInfo::map_heap_regions() {
866 if (MetaspaceShared::is_heap_object_archiving_allowed()) {
867 log_info(cds)("Archived narrow_oop_mode = %d, narrow_oop_base = " PTR_FORMAT ", narrow_oop_shift = %d",
868 narrow_oop_mode(), p2i(narrow_oop_base()), narrow_oop_shift());
869 log_info(cds)("Archived narrow_klass_base = " PTR_FORMAT ", narrow_klass_shift = %d",
870 p2i(narrow_klass_base()), narrow_klass_shift());
871
872 // Check that all the narrow oop and klass encodings match the archive
873 if (narrow_oop_mode() != Universe::narrow_oop_mode() ||
874 narrow_oop_base() != Universe::narrow_oop_base() ||
875 narrow_oop_shift() != Universe::narrow_oop_shift() ||
876 narrow_klass_base() != Universe::narrow_klass_base() ||
877 narrow_klass_shift() != Universe::narrow_klass_shift()) {
878 if (log_is_enabled(Info, cds) && _header->_space[MetaspaceShared::first_string]._used > 0) {
879 log_info(cds)("Cached heap data from the CDS archive is being ignored. "
880 "The current CompressedOops/CompressedClassPointers encoding differs from "
881 "that archived due to heap size change. The archive was dumped using max heap "
882 "size " UINTX_FORMAT "M.", max_heap_size()/M);
883 log_info(cds)("Current narrow_oop_mode = %d, narrow_oop_base = " PTR_FORMAT ", narrow_oop_shift = %d",
884 Universe::narrow_oop_mode(), p2i(Universe::narrow_oop_base()),
885 Universe::narrow_oop_shift());
886 log_info(cds)("Current narrow_klass_base = " PTR_FORMAT ", narrow_klass_shift = %d",
887 p2i(Universe::narrow_klass_base()), Universe::narrow_klass_shift());
888 }
889 } else {
890 // First, map string regions as closed archive heap regions.
891 // GC does not write into the regions.
892 if (map_heap_data(&string_ranges,
893 MetaspaceShared::first_string,
894 MetaspaceShared::max_strings,
895 &num_string_ranges)) {
896 StringTable::set_shared_string_mapped();
897
898 // Now, map open_archive heap regions, GC can write into the regions.
899 if (map_heap_data(&open_archive_heap_ranges,
900 MetaspaceShared::first_open_archive_heap_region,
901 MetaspaceShared::max_open_archive_heap_region,
902 &num_open_archive_heap_ranges,
903 true /* open */)) {
904 MetaspaceShared::set_open_archive_heap_region_mapped();
905 }
906 }
907 }
908 } else {
909 if (log_is_enabled(Info, cds) && _header->_space[MetaspaceShared::first_string]._used > 0) {
910 log_info(cds)("Cached heap data from the CDS archive is being ignored. UseG1GC, "
911 "UseCompressedOops and UseCompressedClassPointers are required.");
912 }
913 }
914
915 if (!StringTable::shared_string_mapped()) {
916 assert(string_ranges == NULL && num_string_ranges == 0, "sanity");
917 }
918
919 if (!MetaspaceShared::open_archive_heap_region_mapped()) {
920 assert(open_archive_heap_ranges == NULL && num_open_archive_heap_ranges == 0, "sanity");
921 }
922 }
923
924 bool FileMapInfo::map_heap_data(MemRegion **heap_mem, int first,
925 int max, int* num, bool is_open_archive) {
926 MemRegion * regions = new MemRegion[max];
927 struct FileMapInfo::FileMapHeader::space_info* si;
928 int region_num = 0;
929
930 for (int i = first;
931 i < first + max; i++) {
932 si = &_header->_space[i];
933 size_t used = si->_used;
934 if (used > 0) {
935 size_t size = used;
936 char* requested_addr = (char*)((void*)CompressedOops::decode_not_null(
937 (narrowOop)si->_addr._offset));
938 regions[region_num] = MemRegion((HeapWord*)requested_addr, size / HeapWordSize);
939 region_num ++;
940 }
941 }
942
943 if (region_num == 0) {
944 return false; // no archived java heap data
945 }
946
947 // Check that ranges are within the java heap
948 if (!G1CollectedHeap::heap()->check_archive_addresses(regions, region_num)) {
949 log_info(cds)("UseSharedSpaces: Unable to allocate region, "
950 "range is not within java heap.");
951 return false;
952 }
953
954 // allocate from java heap
955 if (!G1CollectedHeap::heap()->alloc_archive_regions(
956 regions, region_num, is_open_archive)) {
957 log_info(cds)("UseSharedSpaces: Unable to allocate region, "
958 "java heap range is already in use.");
959 return false;
960 }
961
962 // Map the archived heap data. No need to call MemTracker::record_virtual_memory_type()
963 // for mapped regions as they are part of the reserved java heap, which is
964 // already recorded.
965 for (int i = 0; i < region_num; i++) {
966 si = &_header->_space[first + i];
967 char* addr = (char*)regions[i].start();
968 char* base = os::map_memory(_fd, _full_path, si->_file_offset,
969 addr, regions[i].byte_size(), si->_read_only,
970 si->_allow_exec);
971 if (base == NULL || base != addr) {
972 // dealloc the regions from java heap
973 dealloc_archive_heap_regions(regions, region_num, is_open_archive);
974 log_info(cds)("UseSharedSpaces: Unable to map at required address in java heap.");
975 return false;
976 }
977 }
978
979 if (!verify_mapped_heap_regions(first, region_num)) {
980 // dealloc the regions from java heap
981 dealloc_archive_heap_regions(regions, region_num, is_open_archive);
982 log_info(cds)("UseSharedSpaces: mapped heap regions are corrupt");
983 return false;
984 }
985
986 // the shared heap data is mapped successfully
987 *heap_mem = regions;
988 *num = region_num;
989 return true;
990 }
991
992 bool FileMapInfo::verify_mapped_heap_regions(int first, int num) {
993 assert(num > 0, "sanity");
994 for (int i = first; i < first + num; i++) {
995 if (!verify_region_checksum(i)) {
996 return false;
997 }
998 }
999 return true;
1000 }
1001
1002 void FileMapInfo::fixup_mapped_heap_regions() {
1003 // If any string regions were found, call the fill routine to make them parseable.
1004 // Note that string_ranges may be non-NULL even if no ranges were found.
1005 if (num_string_ranges != 0) {
1006 assert(string_ranges != NULL, "Null string_ranges array with non-zero count");
1007 G1CollectedHeap::heap()->fill_archive_regions(string_ranges, num_string_ranges);
1008 }
1009
1010 // do the same for mapped open archive heap regions
1011 if (num_open_archive_heap_ranges != 0) {
1012 assert(open_archive_heap_ranges != NULL, "NULL open_archive_heap_ranges array with non-zero count");
1013 G1CollectedHeap::heap()->fill_archive_regions(open_archive_heap_ranges,
1014 num_open_archive_heap_ranges);
1015 }
1016 }
1017
1018 // dealloc the archive regions from java heap
1019 void FileMapInfo::dealloc_archive_heap_regions(MemRegion* regions, int num, bool is_open) {
1020 if (num > 0) {
1021 assert(regions != NULL, "Null archive ranges array with non-zero count");
1022 G1CollectedHeap::heap()->dealloc_archive_regions(regions, num, is_open);
1023 }
1024 }
1025 #endif // INCLUDE_CDS_JAVA_HEAP
1026
1027 bool FileMapInfo::verify_region_checksum(int i) {
1028 assert(i >= 0 && i < MetaspaceShared::n_regions, "invalid region");
1029 if (!VerifySharedSpaces) {
1030 return true;
1031 }
1032
1033 size_t sz = _header->_space[i]._used;
1034
1035 if (sz == 0) {
1036 return true; // no data
1037 }
1038 if ((MetaspaceShared::is_string_region(i) &&
1039 !StringTable::shared_string_mapped()) ||
1040 (MetaspaceShared::is_open_archive_heap_region(i) &&
1041 !MetaspaceShared::open_archive_heap_region_mapped())) {
1042 return true; // archived heap data is not mapped
1043 }
1044 const char* buf = _header->region_addr(i);
1045 int crc = ClassLoader::crc32(0, buf, (jint)sz);
1046 if (crc != _header->_space[i]._crc) {
1047 fail_continue("Checksum verification failed.");
1048 return false;
1049 }
1050 return true;
1051 }
1052
1053 // Unmap a memory region in the address space.
1054
1055 void FileMapInfo::unmap_region(int i) {
1056 assert(!MetaspaceShared::is_heap_region(i), "sanity");
1057 struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[i];
1058 size_t used = si->_used;
1059 size_t size = align_up(used, os::vm_allocation_granularity());
1060
1061 if (used == 0) {
1062 return;
1063 }
1064
1065 char* addr = _header->region_addr(i);
1066 if (!os::unmap_memory(addr, size)) {
1067 fail_stop("Unable to unmap shared space.");
1068 }
1069 }
1070
1071 void FileMapInfo::assert_mark(bool check) {
1072 if (!check) {
1073 fail_stop("Mark mismatch while restoring from shared file.");
1074 }
1075 }
1076
1077 void FileMapInfo::metaspace_pointers_do(MetaspaceClosure* it) {
1078 it->push(&_shared_path_table);
1079 for (int i=0; i<_shared_path_table_size; i++) {
1080 shared_path(i)->metaspace_pointers_do(it);
1081 }
1082 }
1083
1084
1085 FileMapInfo* FileMapInfo::_current_info = NULL;
1086 Array<u8>* FileMapInfo::_shared_path_table = NULL;
1087 int FileMapInfo::_shared_path_table_size = 0;
1088 size_t FileMapInfo::_shared_path_entry_size = 0x1234baad;
1089 bool FileMapInfo::_validating_shared_path_table = false;
1090
1091 // Open the shared archive file, read and validate the header
1092 // information (version, boot classpath, etc.). If initialization
1093 // fails, shared spaces are disabled and the file is closed. [See
1094 // fail_continue.]
1095 //
1096 // Validation of the archive is done in two steps:
1097 //
1098 // [1] validate_header() - done here. This checks the header, including _paths_misc_info.
1099 // [2] validate_shared_path_table - this is done later, because the table is in the RW
1100 // region of the archive, which is not mapped yet.
1101 bool FileMapInfo::initialize() {
1102 assert(UseSharedSpaces, "UseSharedSpaces expected.");
1103
1104 if (!open_for_read()) {
1105 return false;
1106 }
1107
1108 init_from_file(_fd);
1109 if (!validate_header()) {
1110 return false;
1111 }
1112 return true;
1113 }
1114
1115 char* FileMapInfo::FileMapHeader::region_addr(int idx) {
1116 if (MetaspaceShared::is_heap_region(idx)) {
1117 return _space[idx]._used > 0 ?
1118 (char*)((void*)CompressedOops::decode_not_null((narrowOop)_space[idx]._addr._offset)) : NULL;
1119 } else {
1120 return _space[idx]._addr._base;
1121 }
1122 }
1123
1124 int FileMapInfo::FileMapHeader::compute_crc() {
1125 char* header = data();
1126 // start computing from the field after _crc
1127 char* buf = (char*)&_crc + sizeof(int);
1128 size_t sz = data_size() - (buf - header);
1129 int crc = ClassLoader::crc32(0, buf, (jint)sz);
1130 return crc;
1131 }
1132
1133 // This function should only be called during run time with UseSharedSpaces enabled.
1134 bool FileMapInfo::FileMapHeader::validate() {
1135 if (VerifySharedSpaces && compute_crc() != _crc) {
1136 fail_continue("Header checksum verification failed.");
1137 return false;
1138 }
1139
1140 if (!Arguments::has_jimage()) {
1141 FileMapInfo::fail_continue("The shared archive file cannot be used with an exploded module build.");
1142 return false;
1143 }
1144
1145 if (_version != current_version()) {
1146 FileMapInfo::fail_continue("The shared archive file is the wrong version.");
1147 return false;
1148 }
1149 if (_magic != (int)0xf00baba2) {
1150 FileMapInfo::fail_continue("The shared archive file has a bad magic number.");
1151 return false;
1152 }
1153 char header_version[JVM_IDENT_MAX];
1154 get_header_version(header_version);
1155 if (strncmp(_jvm_ident, header_version, JVM_IDENT_MAX-1) != 0) {
1156 log_info(class, path)("expected: %s", header_version);
1157 log_info(class, path)("actual: %s", _jvm_ident);
1158 FileMapInfo::fail_continue("The shared archive file was created by a different"
1159 " version or build of HotSpot");
1160 return false;
1161 }
1162 if (_obj_alignment != ObjectAlignmentInBytes) {
1163 FileMapInfo::fail_continue("The shared archive file's ObjectAlignmentInBytes of %d"
1164 " does not equal the current ObjectAlignmentInBytes of " INTX_FORMAT ".",
1165 _obj_alignment, ObjectAlignmentInBytes);
1166 return false;
1167 }
1168 if (_compact_strings != CompactStrings) {
1169 FileMapInfo::fail_continue("The shared archive file's CompactStrings setting (%s)"
1170 " does not equal the current CompactStrings setting (%s).",
1171 _compact_strings ? "enabled" : "disabled",
1172 CompactStrings ? "enabled" : "disabled");
1173 return false;
1174 }
1175
1176 // This must be done after header validation because it might change the
1177 // header data
1178 const char* prop = Arguments::get_property("java.system.class.loader");
1179 if (prop != NULL) {
1180 warning("Archived non-system classes are disabled because the "
1181 "java.system.class.loader property is specified (value = \"%s\"). "
1182 "To use archived non-system classes, this property must be not be set", prop);
1183 _has_platform_or_app_classes = false;
1184 }
1185
1186 // For backwards compatibility, we don't check the verification setting
1187 // if the archive only contains system classes.
1188 if (_has_platform_or_app_classes &&
1189 ((!_verify_local && BytecodeVerificationLocal) ||
1190 (!_verify_remote && BytecodeVerificationRemote))) {
1191 FileMapInfo::fail_continue("The shared archive file was created with less restrictive "
1192 "verification setting than the current setting.");
1193 return false;
1194 }
1195
1196 return true;
1197 }
1198
1199 bool FileMapInfo::validate_header() {
1200 bool status = _header->validate();
1201
1202 if (status) {
1203 if (!ClassLoader::check_shared_paths_misc_info(_paths_misc_info, _header->_paths_misc_info_size)) {
1204 if (!PrintSharedArchiveAndExit) {
1205 fail_continue("shared class paths mismatch (hint: enable -Xlog:class+path=info to diagnose the failure)");
1206 status = false;
1207 }
1208 }
1209 }
1210
1211 if (_paths_misc_info != NULL) {
1212 FREE_C_HEAP_ARRAY(char, _paths_misc_info);
1213 _paths_misc_info = NULL;
1214 }
1215 return status;
1216 }
1217
1218 // Check if a given address is within one of the shared regions
1219 bool FileMapInfo::is_in_shared_region(const void* p, int idx) {
1220 assert(idx == MetaspaceShared::ro ||
1221 idx == MetaspaceShared::rw ||
1222 idx == MetaspaceShared::mc ||
1223 idx == MetaspaceShared::md, "invalid region index");
1224 char* base = _header->region_addr(idx);
1225 if (p >= base && p < base + _header->_space[idx]._used) {
1226 return true;
1227 }
1228 return false;
1229 }
1230
1231 void FileMapInfo::print_shared_spaces() {
1232 tty->print_cr("Shared Spaces:");
1233 for (int i = 0; i < MetaspaceShared::n_regions; i++) {
1234 struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[i];
1235 char *base = _header->region_addr(i);
1236 tty->print(" %s " INTPTR_FORMAT "-" INTPTR_FORMAT,
1237 shared_region_name[i],
1238 p2i(base), p2i(base + si->_used));
1239 }
1240 }
1241
1242 // Unmap mapped regions of shared space.
1243 void FileMapInfo::stop_sharing_and_unmap(const char* msg) {
1244 MetaspaceObj::set_shared_metaspace_range(NULL, NULL);
1245
1246 FileMapInfo *map_info = FileMapInfo::current_info();
1247 if (map_info) {
1248 map_info->fail_continue("%s", msg);
1249 for (int i = 0; i < MetaspaceShared::num_non_heap_spaces; i++) {
1250 char *addr = map_info->_header->region_addr(i);
1251 if (addr != NULL && !MetaspaceShared::is_heap_region(i)) {
1252 map_info->unmap_region(i);
1253 map_info->_header->_space[i]._addr._base = NULL;
1254 }
1255 }
1256 // Dealloc the archive heap regions only without unmapping. The regions are part
1257 // of the java heap. Unmapping of the heap regions are managed by GC.
1258 map_info->dealloc_archive_heap_regions(open_archive_heap_ranges,
1259 num_open_archive_heap_ranges,
1260 true);
1261 map_info->dealloc_archive_heap_regions(string_ranges,
1262 num_string_ranges,
1263 false);
1264 } else if (DumpSharedSpaces) {
1265 fail_stop("%s", msg);
1266 }
1267 }