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 "cds/cds_globals.hpp"
27 #include "cds/classListWriter.hpp"
28 #include "cds/lambdaFormInvokers.inline.hpp"
29 #include "classfile/classFileStream.hpp"
30 #include "classfile/classLoader.hpp"
31 #include "classfile/classLoaderData.hpp"
32 #include "classfile/classLoaderDataGraph.hpp"
33 #include "classfile/moduleEntry.hpp"
34 #include "classfile/systemDictionaryShared.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "oops/constantPool.inline.hpp"
37 #include "oops/instanceKlass.hpp"
38 #include "runtime/mutexLocker.hpp"
39
40 fileStream* ClassListWriter::_classlist_file = nullptr;
41
42 void ClassListWriter::init() {
43 // For -XX:DumpLoadedClassList=<file> option
44 if (DumpLoadedClassList != nullptr) {
45 const char* list_name = make_log_name(DumpLoadedClassList, nullptr);
46 _classlist_file = new(mtInternal)
47 fileStream(list_name);
48 _classlist_file->print_cr("# NOTE: Do not modify this file.");
49 _classlist_file->print_cr("#");
50 _classlist_file->print_cr("# This file is generated via the -XX:DumpLoadedClassList=<class_list_file> option");
51 _classlist_file->print_cr("# and is used at CDS archive dump time (see -Xshare:dump).");
52 _classlist_file->print_cr("#");
53 FREE_C_HEAP_ARRAY(char, list_name);
54 }
55 }
56
57 void ClassListWriter::write(const InstanceKlass* k, const ClassFileStream* cfs) {
111 bool is_builtin_loader = SystemDictionaryShared::is_builtin_loader(loader_data);
112 if (!is_builtin_loader) {
113 // class may be loaded from shared archive
114 if (!k->is_shared()) {
115 if (cfs == nullptr || cfs->source() == nullptr) {
116 // CDS static dump only handles unregistered class with known source.
117 return;
118 }
119 if (strncmp(cfs->source(), "file:", 5) != 0) {
120 return;
121 }
122 } else {
123 // Shared unregistered classes are skipped since their real source are not recorded in shared space.
124 return;
125 }
126 if (!SystemDictionaryShared::add_unregistered_class(Thread::current(), (InstanceKlass*)k)) {
127 return;
128 }
129 }
130
131 // filter out java/lang/invoke/BoundMethodHandle$Species...
132 if (cfs != nullptr && cfs->source() != nullptr && strcmp(cfs->source(), "_ClassSpecializer_generateConcreteSpeciesCode") == 0) {
133 return;
134 }
135
136 {
137 InstanceKlass* super = k->java_super();
138 if (super != nullptr && !has_id(super)) {
139 return;
140 }
141
142 Array<InstanceKlass*>* interfaces = k->local_interfaces();
143 int len = interfaces->length();
144 for (int i = 0; i < len; i++) {
145 InstanceKlass* intf = interfaces->at(i);
146 if (!has_id(intf)) {
147 return;
148 }
149 }
150 }
151
152 if (k->is_hidden()) {
153 return;
185 #endif
186 }
187
188 stream->cr();
189 stream->flush();
190 }
191
192 void ClassListWriter::delete_classlist() {
193 if (_classlist_file != nullptr) {
194 delete _classlist_file;
195 }
196 }
197
198 class ClassListWriter::WriteResolveConstantsCLDClosure : public CLDClosure {
199 public:
200 void do_cld(ClassLoaderData* cld) {
201 for (Klass* klass = cld->klasses(); klass != nullptr; klass = klass->next_link()) {
202 if (klass->is_instance_klass()) {
203 InstanceKlass* ik = InstanceKlass::cast(klass);
204 write_resolved_constants_for(ik);
205 }
206 }
207 }
208 };
209
210 void ClassListWriter::write_resolved_constants() {
211 if (!is_enabled()) {
212 return;
213 }
214 MutexLocker lock(ClassLoaderDataGraph_lock);
215 MutexLocker lock2(ClassListFile_lock, Mutex::_no_safepoint_check_flag);
216
217 WriteResolveConstantsCLDClosure closure;
218 ClassLoaderDataGraph::loaded_cld_do(&closure);
219 }
220
221 void ClassListWriter::write_resolved_constants_for(InstanceKlass* ik) {
222 if (!SystemDictionaryShared::is_builtin_loader(ik->class_loader_data()) ||
223 ik->is_hidden()) {
224 return;
225 }
226 if (LambdaFormInvokers::may_be_regenerated_class(ik->name())) {
227 return;
228 }
229 if (ik->name()->equals("jdk/internal/module/SystemModules$all")) {
230 // This class is regenerated during JDK build process, so the classlist
231 // may not match the version that's in the real jdk image.
232 return;
233 }
234
235 if (!has_id(ik)) { // do not resolve CP for classes loaded by custom loaders.
236 return;
237 }
238
239 ResourceMark rm;
240 ConstantPool* cp = ik->constants();
241 GrowableArray<bool> list(cp->length(), cp->length(), false);
242 bool print = false;
243
244 for (int cp_index = 1; cp_index < cp->length(); cp_index++) { // Index 0 is unused
245 switch (cp->tag_at(cp_index).value()) {
246 case JVM_CONSTANT_Class:
247 {
248 Klass* k = cp->resolved_klass_at(cp_index);
249 if (k->is_instance_klass()) {
250 list.at_put(cp_index, true);
251 print = true;
252 }
253 }
254 break;
255 }
256 }
257
258 if (cp->cache() != nullptr) {
259 Array<ResolvedFieldEntry>* field_entries = cp->cache()->resolved_field_entries();
260 if (field_entries != nullptr) {
261 for (int i = 0; i < field_entries->length(); i++) {
262 ResolvedFieldEntry* rfe = field_entries->adr_at(i);
263 if (rfe->is_resolved(Bytecodes::_getfield) ||
264 rfe->is_resolved(Bytecodes::_putfield)) {
265 list.at_put(rfe->constant_pool_index(), true);
266 print = true;
267 }
268 }
269 }
270
271 Array<ResolvedMethodEntry>* method_entries = cp->cache()->resolved_method_entries();
272 if (method_entries != nullptr) {
273 for (int i = 0; i < method_entries->length(); i++) {
274 ResolvedMethodEntry* rme = method_entries->adr_at(i);
275 if (rme->is_resolved(Bytecodes::_invokevirtual) ||
276 rme->is_resolved(Bytecodes::_invokespecial) ||
277 rme->is_resolved(Bytecodes::_invokeinterface)) {
278 list.at_put(rme->constant_pool_index(), true);
279 print = true;
280 }
281 }
282 }
283 }
284
285 if (print) {
286 outputStream* stream = _classlist_file;
287 stream->print("@cp %s", ik->name()->as_C_string());
288 for (int i = 0; i < list.length(); i++) {
289 if (list.at(i)) {
290 constantTag cp_tag = cp->tag_at(i).value();
291 assert(cp_tag.value() == JVM_CONSTANT_Class ||
292 cp_tag.value() == JVM_CONSTANT_Fieldref ||
293 cp_tag.value() == JVM_CONSTANT_Methodref||
294 cp_tag.value() == JVM_CONSTANT_InterfaceMethodref, "sanity");
295 stream->print(" %d", i);
296 }
297 }
298 stream->cr();
299 }
300 }
|
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 "cds/aotConstantPoolResolver.hpp"
27 #include "cds/cds_globals.hpp"
28 #include "cds/classListParser.hpp"
29 #include "cds/classListWriter.hpp"
30 #include "cds/lambdaFormInvokers.inline.hpp"
31 #include "classfile/classFileStream.hpp"
32 #include "classfile/classLoader.hpp"
33 #include "classfile/classLoaderData.hpp"
34 #include "classfile/classLoaderDataGraph.hpp"
35 #include "classfile/moduleEntry.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionaryShared.hpp"
38 #include "memory/resourceArea.hpp"
39 #include "oops/constantPool.inline.hpp"
40 #include "oops/instanceKlass.hpp"
41 #include "runtime/javaCalls.hpp"
42 #include "runtime/mutexLocker.hpp"
43
44 fileStream* ClassListWriter::_classlist_file = nullptr;
45
46 void ClassListWriter::init() {
47 // For -XX:DumpLoadedClassList=<file> option
48 if (DumpLoadedClassList != nullptr) {
49 const char* list_name = make_log_name(DumpLoadedClassList, nullptr);
50 _classlist_file = new(mtInternal)
51 fileStream(list_name);
52 _classlist_file->print_cr("# NOTE: Do not modify this file.");
53 _classlist_file->print_cr("#");
54 _classlist_file->print_cr("# This file is generated via the -XX:DumpLoadedClassList=<class_list_file> option");
55 _classlist_file->print_cr("# and is used at CDS archive dump time (see -Xshare:dump).");
56 _classlist_file->print_cr("#");
57 FREE_C_HEAP_ARRAY(char, list_name);
58 }
59 }
60
61 void ClassListWriter::write(const InstanceKlass* k, const ClassFileStream* cfs) {
115 bool is_builtin_loader = SystemDictionaryShared::is_builtin_loader(loader_data);
116 if (!is_builtin_loader) {
117 // class may be loaded from shared archive
118 if (!k->is_shared()) {
119 if (cfs == nullptr || cfs->source() == nullptr) {
120 // CDS static dump only handles unregistered class with known source.
121 return;
122 }
123 if (strncmp(cfs->source(), "file:", 5) != 0) {
124 return;
125 }
126 } else {
127 // Shared unregistered classes are skipped since their real source are not recorded in shared space.
128 return;
129 }
130 if (!SystemDictionaryShared::add_unregistered_class(Thread::current(), (InstanceKlass*)k)) {
131 return;
132 }
133 }
134
135 if (cfs != nullptr && cfs->source() != nullptr) {
136 if (strcmp(cfs->source(), "_ClassSpecializer_generateConcreteSpeciesCode") == 0) {
137 return;
138 }
139
140 if (strncmp(cfs->source(), "__", 2) == 0) {
141 // generated class: __dynamic_proxy__, __JVM_LookupDefineClass__, etc
142 return;
143 }
144 }
145
146 {
147 InstanceKlass* super = k->java_super();
148 if (super != nullptr && !has_id(super)) {
149 return;
150 }
151
152 Array<InstanceKlass*>* interfaces = k->local_interfaces();
153 int len = interfaces->length();
154 for (int i = 0; i < len; i++) {
155 InstanceKlass* intf = interfaces->at(i);
156 if (!has_id(intf)) {
157 return;
158 }
159 }
160 }
161
162 if (k->is_hidden()) {
163 return;
195 #endif
196 }
197
198 stream->cr();
199 stream->flush();
200 }
201
202 void ClassListWriter::delete_classlist() {
203 if (_classlist_file != nullptr) {
204 delete _classlist_file;
205 }
206 }
207
208 class ClassListWriter::WriteResolveConstantsCLDClosure : public CLDClosure {
209 public:
210 void do_cld(ClassLoaderData* cld) {
211 for (Klass* klass = cld->klasses(); klass != nullptr; klass = klass->next_link()) {
212 if (klass->is_instance_klass()) {
213 InstanceKlass* ik = InstanceKlass::cast(klass);
214 write_resolved_constants_for(ik);
215 write_array_info_for(ik); // FIXME: piggybacking on WriteResolveConstantsCLDClosure is misleading
216 }
217 }
218 }
219 };
220
221 void ClassListWriter::write_array_info_for(InstanceKlass* ik) {
222 ObjArrayKlass* oak = ik->array_klasses();
223 if (oak != nullptr) {
224 while (oak->higher_dimension() != nullptr) {
225 oak = oak->higher_dimension();
226 }
227 ResourceMark rm;
228 outputStream* stream = _classlist_file;
229 stream->print_cr("%s %s %d", ClassListParser::ARRAY_TAG, ik->name()->as_C_string(), oak->dimension());
230 }
231 }
232
233 void ClassListWriter::write_resolved_constants() {
234 if (!is_enabled()) {
235 return;
236 }
237 MutexLocker lock(ClassLoaderDataGraph_lock);
238 MutexLocker lock2(ClassListFile_lock, Mutex::_no_safepoint_check_flag);
239
240 WriteResolveConstantsCLDClosure closure;
241 ClassLoaderDataGraph::loaded_cld_do(&closure);
242 }
243
244 void ClassListWriter::write_reflection_data() {
245 if (!is_enabled()) {
246 return;
247 }
248 auto collector = [&] (const InstanceKlass* ik, int id) {
249 write_reflection_data_for(const_cast<InstanceKlass*>(ik));
250 };
251 _id_table->iterate_all(collector);
252 }
253
254 void ClassListWriter::write_reflection_data_for(InstanceKlass* ik) {
255 ResourceMark rm;
256 outputStream* stream = _classlist_file;
257 if (!SystemDictionaryShared::is_builtin_loader(ik->class_loader_data()) || ik->is_hidden()) {
258 return; // ignore
259 }
260 if (java_lang_Class::has_reflection_data(ik->java_mirror())) {
261 EXCEPTION_MARK;
262 int rd_flags = AOTConstantPoolResolver::class_reflection_data_flags(ik, THREAD);
263 if (!HAS_PENDING_EXCEPTION) {
264 // We can't hold the lock when doing the upcall inside class_reflection_data_flags()
265 MutexLocker lock2(ClassListFile_lock, Mutex::_no_safepoint_check_flag);
266 stream->print_cr("%s %s %d", ClassListParser::CLASS_REFLECTION_DATA_TAG, ik->name()->as_C_string(), rd_flags);
267 }
268 }
269 }
270
271 void ClassListWriter::write_resolved_constants_for(InstanceKlass* ik) {
272 if (!SystemDictionaryShared::is_builtin_loader(ik->class_loader_data()) ||
273 ik->is_hidden()) {
274 return;
275 }
276 if (LambdaFormInvokers::may_be_regenerated_class(ik->name())) {
277 return;
278 }
279 if (ik->name()->equals("jdk/internal/module/SystemModules$all")) {
280 // This class is regenerated during JDK build process, so the classlist
281 // may not match the version that's in the real jdk image.
282 return;
283 }
284
285 if (!has_id(ik)) { // do not resolve CP for classes loaded by custom loaders.
286 return;
287 }
288
289 ResourceMark rm;
290 ConstantPool* cp = ik->constants();
291 GrowableArray<bool> list(cp->length(), cp->length(), false);
292 bool print = false;
293
294 for (int cp_index = 1; cp_index < cp->length(); cp_index++) { // Index 0 is unused
295 switch (cp->tag_at(cp_index).value()) {
296 case JVM_CONSTANT_Class:
297 {
298 Klass* k = cp->resolved_klass_at(cp_index);
299 if (k->is_instance_klass()) {
300 list.at_put(cp_index, true);
301 print = true;
302 }
303 }
304 break;
305 }
306 }
307
308 if (cp->cache() != nullptr) {
309 Array<ResolvedIndyEntry>* indy_entries = cp->cache()->resolved_indy_entries();
310 if (indy_entries != nullptr) {
311 for (int i = 0; i < indy_entries->length(); i++) {
312 ResolvedIndyEntry* rie = indy_entries->adr_at(i);
313 int cp_index = rie->constant_pool_index();
314 if (rie->is_resolved()) {
315 list.at_put(cp_index, true);
316 print = true;
317 }
318 }
319 }
320
321 Array<ResolvedFieldEntry>* field_entries = cp->cache()->resolved_field_entries();
322 if (field_entries != nullptr) {
323 for (int i = 0; i < field_entries->length(); i++) {
324 ResolvedFieldEntry* rfe = field_entries->adr_at(i);
325 if (rfe->is_resolved(Bytecodes::_getfield) ||
326 rfe->is_resolved(Bytecodes::_putfield)) {
327 list.at_put(rfe->constant_pool_index(), true);
328 print = true;
329 }
330 }
331 }
332
333 Array<ResolvedMethodEntry>* method_entries = cp->cache()->resolved_method_entries();
334 if (method_entries != nullptr) {
335 for (int i = 0; i < method_entries->length(); i++) {
336 ResolvedMethodEntry* rme = method_entries->adr_at(i);
337 if (rme->is_resolved(Bytecodes::_invokevirtual) ||
338 rme->is_resolved(Bytecodes::_invokespecial) ||
339 rme->is_resolved(Bytecodes::_invokeinterface) ||
340 rme->is_resolved(Bytecodes::_invokestatic) ||
341 rme->is_resolved(Bytecodes::_invokehandle)) {
342 list.at_put(rme->constant_pool_index(), true);
343 print = true;
344 }
345 }
346 }
347 }
348
349 if (print) {
350 outputStream* stream = _classlist_file;
351 stream->print("@cp %s", ik->name()->as_C_string());
352 for (int i = 0; i < list.length(); i++) {
353 if (list.at(i)) {
354 constantTag cp_tag = cp->tag_at(i).value();
355 assert(cp_tag.value() == JVM_CONSTANT_Class ||
356 cp_tag.value() == JVM_CONSTANT_Fieldref ||
357 cp_tag.value() == JVM_CONSTANT_Methodref||
358 cp_tag.value() == JVM_CONSTANT_InterfaceMethodref ||
359 cp_tag.value() == JVM_CONSTANT_InvokeDynamic, "sanity");
360 stream->print(" %d", i);
361 }
362 }
363 stream->cr();
364 }
365 }
366
367 void ClassListWriter::write_loader_negative_lookup_cache_for(oop loader, const char* loader_type) {
368 TempNewSymbol method = SymbolTable::new_symbol("negativeLookupCacheContents");
369 TempNewSymbol signature = SymbolTable::new_symbol("()Ljava/lang/String;");
370
371 EXCEPTION_MARK;
372 HandleMark hm(THREAD);
373
374 JavaValue result(T_OBJECT);
375 JavaCalls::call_virtual(&result,
376 Handle(THREAD, loader),
377 loader->klass(),
378 method,
379 signature,
380 CHECK);
381
382 if (HAS_PENDING_EXCEPTION) {
383 log_warning(cds)("Error during BuiltinClassLoader::negativeLookupCacheContents() call for %s loader", loader_type);
384 CLEAR_PENDING_EXCEPTION;
385 return;
386 } else if (result.get_oop() == nullptr) {
387 return;
388 }
389
390 ResourceMark rm;
391 const char* cache_contents = java_lang_String::as_utf8_string(result.get_oop());
392 log_debug(cds)("%s loader negative cache: %s", loader_type, cache_contents);
393
394 outputStream* stream = _classlist_file;
395 const size_t buffer_size = strlen(ClassListParser::LOADER_NEGATIVE_CACHE_TAG) + 1 /* for space*/
396 + strlen(loader_type) + 1 /* for space */ + strlen(cache_contents) + 1 /* for null character */;
397 char* buffer = NEW_C_HEAP_ARRAY(char, buffer_size, mtInternal);
398 _classlist_file->set_scratch_buffer(buffer, buffer_size);
399 MutexLocker lock2(ClassListFile_lock, Mutex::_no_safepoint_check_flag);
400 stream->print("%s %s %s", ClassListParser::LOADER_NEGATIVE_CACHE_TAG, loader_type, cache_contents);
401 stream->cr();
402 _classlist_file->set_scratch_buffer(nullptr, 0);
403 }
404
405 void ClassListWriter::write_loader_negative_lookup_cache() {
406 if (!is_enabled()) {
407 return;
408 }
409
410 write_loader_negative_lookup_cache_for(SystemDictionary::java_platform_loader(), "platform");
411 write_loader_negative_lookup_cache_for(SystemDictionary::java_system_loader(), "app");
412 }
|