1 /*
2 * Copyright (c) 2015, 2024, 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 "cds/archiveUtils.hpp"
27 #include "cds/classListParser.hpp"
28 #include "cds/classPrelinker.hpp"
29 #include "cds/lambdaFormInvokers.hpp"
30 #include "cds/metaspaceShared.hpp"
31 #include "cds/unregisteredClasses.hpp"
32 #include "classfile/classLoaderExt.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/symbolTable.hpp"
35 #include "classfile/systemDictionary.hpp"
36 #include "classfile/systemDictionaryShared.hpp"
37 #include "classfile/vmClasses.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "interpreter/bytecode.hpp"
40 #include "interpreter/bytecodeStream.hpp"
41 #include "interpreter/linkResolver.hpp"
42 #include "jimage.hpp"
43 #include "jvm.h"
44 #include "logging/log.hpp"
45 #include "logging/logTag.hpp"
46 #include "memory/resourceArea.hpp"
47 #include "oops/constantPool.inline.hpp"
48 #include "runtime/atomic.hpp"
49 #include "runtime/handles.inline.hpp"
50 #include "runtime/java.hpp"
51 #include "runtime/javaCalls.hpp"
52 #include "utilities/defaultStream.hpp"
53 #include "utilities/macros.hpp"
54 #include "utilities/utf8.hpp"
55
56 const char* ClassListParser::CONSTANT_POOL_TAG = "@cp";
57 const char* ClassListParser::LAMBDA_FORM_TAG = "@lambda-form-invoker";
58 const char* ClassListParser::LAMBDA_PROXY_TAG = "@lambda-proxy";
59
60 volatile Thread* ClassListParser::_parsing_thread = nullptr;
61 ClassListParser* ClassListParser::_instance = nullptr;
62
63 ClassListParser::ClassListParser(const char* file, ParseMode parse_mode) :
64 _classlist_file(file),
65 _id2klass_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE),
66 _file_input(do_open(file), /* need_close=*/true),
67 _input_stream(&_file_input),
68 _parse_mode(parse_mode) {
69 log_info(cds)("Parsing %s%s", file,
70 parse_lambda_forms_invokers_only() ? " (lambda form invokers only)" : "");
71 if (!_file_input.is_open()) {
72 char errmsg[JVM_MAXPATHLEN];
73 os::lasterror(errmsg, JVM_MAXPATHLEN);
74 vm_exit_during_initialization("Loading classlist failed", errmsg);
75 }
76 _token = _line = nullptr;
77 _interfaces = new (mtClass) GrowableArray<int>(10, mtClass);
78 _indy_items = new (mtClass) GrowableArray<const char*>(9, mtClass);
79
80 // _instance should only be accessed by the thread that created _instance.
81 assert(_instance == nullptr, "must be singleton");
82 _instance = this;
83 Atomic::store(&_parsing_thread, Thread::current());
84 }
85
86 FILE* ClassListParser::do_open(const char* file) {
87 // Use os::open() because neither fopen() nor os::fopen()
88 // can handle long path name on Windows. (See JDK-8216184)
89 int fd = os::open(file, O_RDONLY, S_IREAD);
90 FILE* fp = nullptr;
91 if (fd != -1) {
92 // Obtain a FILE* from the file descriptor so that _input_stream
93 // can be used in ClassListParser::parse()
94 fp = os::fdopen(fd, "r");
95 }
96 return fp;
97 }
98
99 bool ClassListParser::is_parsing_thread() {
100 return Atomic::load(&_parsing_thread) == Thread::current();
101 }
102
103 ClassListParser::~ClassListParser() {
104 Atomic::store(&_parsing_thread, (Thread*)nullptr);
105 delete _indy_items;
106 delete _interfaces;
107 _instance = nullptr;
108 }
109
110 void ClassListParser::parse(TRAPS) {
111 for (; !_input_stream.done(); _input_stream.next()) {
112 _line = _input_stream.current_line();
113 clean_up_input_line();
114
115 // Each line in the classlist can be one of three forms:
116 if (_line[0] == '#') {
117 // A comment; ignore it
118 } else if (_line[0] == '@') {
119 // @xxx - a tag like @lambda-proxy, to be parsed by parse_at_tags()
120 parse_at_tags(CHECK);
121 } else {
122 // A class name, followed by optional attributes. E.g.
123 // java/lang/String
124 // java/lang/Object id: 1
125 // my/pkg/TestClass id: 5 super: 1 interfaces: 3 4 source: foo.jar
126 parse_class_name_and_attributes(CHECK);
127 }
128 }
129 }
130
131 void ClassListParser::parse_class_name_and_attributes(TRAPS) {
132 read_class_name_and_attributes();
133
134 if (parse_lambda_forms_invokers_only()) {
135 return;
136 }
137
138 check_class_name(_class_name);
139 TempNewSymbol class_name_symbol = SymbolTable::new_symbol(_class_name);
140 Klass* klass = load_current_class(class_name_symbol, THREAD);
141 if (HAS_PENDING_EXCEPTION) {
142 if (PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())) {
143 // If we have run out of memory, don't try to load the rest of the classes in
144 // the classlist. Throw an exception, which will terminate the dumping process.
145 return; // THROW
146 }
147
148 ResourceMark rm(THREAD);
149 char* ex_msg = (char*)"";
150 oop message = java_lang_Throwable::message(PENDING_EXCEPTION);
151 if (message != nullptr) {
152 ex_msg = java_lang_String::as_utf8_string(message);
153 }
154 log_warning(cds)("%s: %s", PENDING_EXCEPTION->klass()->external_name(), ex_msg);
155 // We might have an invalid class name or an bad class. Warn about it
156 // and keep going to the next line.
157 CLEAR_PENDING_EXCEPTION;
158 log_warning(cds)("Preload Warning: Cannot find %s", _class_name);
159 return;
160 }
161
162 assert(klass != nullptr, "sanity");
163 if (log_is_enabled(Trace, cds)) {
164 ResourceMark rm(THREAD);
165 log_trace(cds)("Shared spaces preloaded: %s", klass->external_name());
166 }
167
168 if (klass->is_instance_klass()) {
169 InstanceKlass* ik = InstanceKlass::cast(klass);
170
171 // Link the class to cause the bytecodes to be rewritten and the
172 // cpcache to be created. The linking is done as soon as classes
173 // are loaded in order that the related data structures (klass and
174 // cpCache) are located together.
175 MetaspaceShared::try_link_class(THREAD, ik);
176 }
177 }
178
179 void ClassListParser::clean_up_input_line() {
180 int len = (int)strlen(_line);
181 int i;
182 // Replace \t\r\n\f with ' '
183 for (i=0; i<len; i++) {
184 if (_line[i] == '\t' || _line[i] == '\r' || _line[i] == '\n' || _line[i] == '\f') {
185 _line[i] = ' ';
186 }
187 }
188
189 // Remove trailing newline/space
190 while (len > 0) {
191 if (_line[len-1] == ' ') {
192 _line[len-1] = '\0';
193 len --;
194 } else {
195 break;
196 }
197 }
198 _line_len = len;
199 }
200
201 void ClassListParser::read_class_name_and_attributes() {
202 _class_name = _line;
203 _id = _unspecified;
204 _super = _unspecified;
205 _interfaces->clear();
206 _source = nullptr;
207 _interfaces_specified = false;
208
209 if ((_token = strchr(_line, ' ')) == nullptr) {
210 // No optional attributes are specified.
211 return;
212 }
213
214 // Mark the end of the name, and go to the next input char
215 *_token++ = '\0';
216
217 while (*_token) {
218 skip_whitespaces();
219
220 if (parse_uint_option("id:", &_id)) {
221 continue;
222 } else if (parse_uint_option("super:", &_super)) {
223 check_already_loaded("Super class", _super);
224 continue;
225 } else if (skip_token("interfaces:")) {
226 int i;
227 while (try_parse_uint(&i)) {
228 check_already_loaded("Interface", i);
229 _interfaces->append(i);
230 }
231 } else if (skip_token("source:")) {
232 skip_whitespaces();
233 _source = _token;
234 char* s = strchr(_token, ' ');
235 if (s == nullptr) {
236 break; // end of input line
237 } else {
238 *s = '\0'; // mark the end of _source
239 _token = s+1;
240 }
241 } else {
242 error("Unknown input");
243 }
244 }
245
246 // if src is specified
247 // id super interfaces must all be specified
248 // loader may be specified
249 // else
250 // # the class is loaded from classpath
251 // id may be specified
252 // super, interfaces, loader must not be specified
253 }
254
255 void ClassListParser::split_tokens_by_whitespace(int offset, GrowableArray<const char*>* items) {
256 int start = offset;
257 int end;
258 bool done = false;
259 while (!done) {
260 while (_line[start] == ' ' || _line[start] == '\t') start++;
261 end = start;
262 while (_line[end] && _line[end] != ' ' && _line[end] != '\t') end++;
263 if (_line[end] == '\0') {
264 done = true;
265 } else {
266 _line[end] = '\0';
267 }
268 items->append(_line + start);
269 start = ++end;
270 }
271 }
272
273 int ClassListParser::split_at_tag_from_line() {
274 _token = _line;
275 char* ptr;
276 if ((ptr = strchr(_line, ' ')) == nullptr) {
277 error("Too few items following the @ tag \"%s\" line #%zu", _line, lineno());
278 return 0;
279 }
280 *ptr++ = '\0';
281 while (*ptr == ' ' || *ptr == '\t') ptr++;
282 return (int)(ptr - _line);
283 }
284
285 void ClassListParser::parse_at_tags(TRAPS) {
286 assert(_line[0] == '@', "must be");
287 int offset = split_at_tag_from_line();
288 assert(offset > 0, "would have exited VM");
289
290 if (strcmp(_token, LAMBDA_PROXY_TAG) == 0) {
291 _indy_items->clear();
292 split_tokens_by_whitespace(offset, _indy_items);
293 if (_indy_items->length() < 2) {
294 error("Line with @ tag has too few items \"%s\" line #%zu", _token, lineno());
295 }
296 if (!parse_lambda_forms_invokers_only()) {
297 _class_name = _indy_items->at(0);
298 check_class_name(_class_name);
299 TempNewSymbol class_name_symbol = SymbolTable::new_symbol(_class_name);
300 if (_indy_items->length() > 0) {
301 // The current line is "@lambda-proxy class_name". Load the proxy class.
302 resolve_indy(THREAD, class_name_symbol);
303 }
304 }
305 } else if (strcmp(_token, LAMBDA_FORM_TAG) == 0) {
306 LambdaFormInvokers::append(os::strdup((const char*)(_line + offset), mtInternal));
307 } else if (strcmp(_token, CONSTANT_POOL_TAG) == 0) {
308 _token = _line + offset;
309 parse_constant_pool_tag();
310 } else {
311 error("Invalid @ tag at the beginning of line \"%s\" line #%zu", _token, lineno());
312 }
313 }
314
315 void ClassListParser::skip_whitespaces() {
316 while (*_token == ' ' || *_token == '\t') {
317 _token ++;
318 }
319 }
320
321 void ClassListParser::skip_non_whitespaces() {
322 while (*_token && *_token != ' ' && *_token != '\t') {
323 _token ++;
324 }
325 }
326
327 void ClassListParser::parse_int(int* value) {
328 skip_whitespaces();
329 if (sscanf(_token, "%i", value) == 1) {
330 skip_non_whitespaces();
331 } else {
332 error("Error: expected integer");
333 }
334 }
335
336 void ClassListParser::parse_uint(int* value) {
337 parse_int(value);
338 if (*value < 0) {
339 error("Error: negative integers not allowed (%d)", *value);
340 }
341 }
342
343 bool ClassListParser::try_parse_uint(int* value) {
344 skip_whitespaces();
345 if (sscanf(_token, "%i", value) == 1) {
346 skip_non_whitespaces();
347 return true;
348 }
349 return false;
350 }
351
352 bool ClassListParser::skip_token(const char* option_name) {
353 size_t len = strlen(option_name);
354 if (strncmp(_token, option_name, len) == 0) {
355 _token += len;
356 return true;
357 } else {
358 return false;
359 }
360 }
361
362 bool ClassListParser::parse_int_option(const char* option_name, int* value) {
363 if (skip_token(option_name)) {
364 if (*value != _unspecified) {
365 error("%s specified twice", option_name);
366 } else {
367 parse_int(value);
368 return true;
369 }
370 }
371 return false;
372 }
373
374 bool ClassListParser::parse_uint_option(const char* option_name, int* value) {
375 if (skip_token(option_name)) {
376 if (*value != _unspecified) {
377 error("%s specified twice", option_name);
378 } else {
379 parse_uint(value);
380 return true;
381 }
382 }
383 return false;
384 }
385
386 void ClassListParser::print_specified_interfaces() {
387 const int n = _interfaces->length();
388 jio_fprintf(defaultStream::error_stream(), "Currently specified interfaces[%d] = {\n", n);
389 for (int i=0; i<n; i++) {
390 InstanceKlass* k = lookup_class_by_id(_interfaces->at(i));
391 jio_fprintf(defaultStream::error_stream(), " %4d = %s\n", _interfaces->at(i), k->name()->as_klass_external_name());
392 }
393 jio_fprintf(defaultStream::error_stream(), "}\n");
394 }
395
396 void ClassListParser::print_actual_interfaces(InstanceKlass* ik) {
397 int n = ik->local_interfaces()->length();
398 jio_fprintf(defaultStream::error_stream(), "Actual interfaces[%d] = {\n", n);
399 for (int i = 0; i < n; i++) {
400 InstanceKlass* e = ik->local_interfaces()->at(i);
401 jio_fprintf(defaultStream::error_stream(), " %s\n", e->name()->as_klass_external_name());
402 }
403 jio_fprintf(defaultStream::error_stream(), "}\n");
404 }
405
406 void ClassListParser::print_diagnostic_info(outputStream* st, const char* msg, ...) {
407 va_list ap;
408 va_start(ap, msg);
409 print_diagnostic_info(st, msg, ap);
410 va_end(ap);
411 }
412
413 void ClassListParser::print_diagnostic_info(outputStream* st, const char* msg, va_list ap) {
414 int error_index = pointer_delta_as_int(_token, _line);
415 if (error_index >= _line_len) {
416 error_index = _line_len - 1;
417 }
418 if (error_index < 0) {
419 error_index = 0;
420 }
421
422 jio_fprintf(defaultStream::error_stream(),
423 "An error has occurred while processing class list file %s %zu:%d.\n",
424 _classlist_file, lineno(), (error_index + 1));
425 jio_vfprintf(defaultStream::error_stream(), msg, ap);
426
427 if (_line_len <= 0) {
428 st->print("\n");
429 } else {
430 st->print(":\n");
431 for (int i=0; i<_line_len; i++) {
432 char c = _line[i];
433 if (c == '\0') {
434 st->print("%s", " ");
435 } else {
436 st->print("%c", c);
437 }
438 }
439 st->print("\n");
440 for (int i=0; i<error_index; i++) {
441 st->print("%s", " ");
442 }
443 st->print("^\n");
444 }
445 }
446
447 void ClassListParser::error(const char* msg, ...) {
448 va_list ap;
449 va_start(ap, msg);
450 fileStream fs(defaultStream::error_stream());
451 //TODO: we should write to UL/error instead, but that requires fixing some tests cases.
452 //LogTarget(Error, cds) lt;
453 //LogStream ls(lt);
454 print_diagnostic_info(&fs, msg, ap);
455 va_end(ap);
456 vm_exit_during_initialization("class list format error.", nullptr);
457 }
458
459 void ClassListParser::check_class_name(const char* class_name) {
460 const char* err = nullptr;
461 size_t len = strlen(class_name);
462 if (len > (size_t)Symbol::max_length()) {
463 err = "class name too long";
464 } else {
465 assert(Symbol::max_length() < INT_MAX && len < INT_MAX, "must be");
466 if (!UTF8::is_legal_utf8((const unsigned char*)class_name, len, /*version_leq_47*/false)) {
467 err = "class name is not valid UTF8";
468 }
469 }
470 if (err != nullptr) {
471 jio_fprintf(defaultStream::error_stream(),
472 "An error has occurred while processing class list file %s:%zu %s\n",
473 _classlist_file, lineno(), err);
474 vm_exit_during_initialization("class list format error.", nullptr);
475 }
476 }
477
478 void ClassListParser::constant_pool_resolution_warning(const char* msg, ...) {
479 va_list ap;
480 va_start(ap, msg);
481 LogTarget(Warning, cds, resolve) lt;
482 LogStream ls(lt);
483 print_diagnostic_info(&ls, msg, ap);
484 ls.print("Your classlist may be out of sync with the JDK or the application.");
485 va_end(ap);
486 }
487
488 // This function is used for loading classes for customized class loaders
489 // during archive dumping.
490 InstanceKlass* ClassListParser::load_class_from_source(Symbol* class_name, TRAPS) {
491 #if !(defined(_LP64) && (defined(LINUX) || defined(__APPLE__) || defined(_WINDOWS)))
492 // The only supported platforms are: (1) Linux/64-bit and (2) Solaris/64-bit and
493 // (3) MacOSX/64-bit and (4) Windowss/64-bit
494 // This #if condition should be in sync with the areCustomLoadersSupportedForCDS
495 // method in test/lib/jdk/test/lib/Platform.java.
496 error("AppCDS custom class loaders not supported on this platform");
497 #endif
498
499 if (!is_super_specified()) {
500 error("If source location is specified, super class must be also specified");
501 }
502 if (!is_id_specified()) {
503 error("If source location is specified, id must be also specified");
504 }
505 if (strncmp(_class_name, "java/", 5) == 0) {
506 log_info(cds)("Prohibited package for non-bootstrap classes: %s.class from %s",
507 _class_name, _source);
508 THROW_NULL(vmSymbols::java_lang_ClassNotFoundException());
509 }
510
511 ResourceMark rm;
512 char * source_path = os::strdup_check_oom(ClassLoader::uri_to_path(_source));
513 InstanceKlass* k = UnregisteredClasses::load_class(class_name, source_path, CHECK_NULL);
514 if (k->local_interfaces()->length() != _interfaces->length()) {
515 print_specified_interfaces();
516 print_actual_interfaces(k);
517 error("The number of interfaces (%d) specified in class list does not match the class file (%d)",
518 _interfaces->length(), k->local_interfaces()->length());
519 }
520
521 assert(k->is_shared_unregistered_class(), "must be");
522
523 bool added = SystemDictionaryShared::add_unregistered_class(THREAD, k);
524 if (!added) {
525 // We allow only a single unregistered class for each unique name.
526 error("Duplicated class %s", _class_name);
527 }
528
529 return k;
530 }
531
532 void ClassListParser::populate_cds_indy_info(const constantPoolHandle &pool, int cp_index, CDSIndyInfo* cii, TRAPS) {
533 // Caller needs to allocate ResourceMark.
534 int type_index = pool->bootstrap_name_and_type_ref_index_at(cp_index);
535 int name_index = pool->name_ref_index_at(type_index);
536 cii->add_item(pool->symbol_at(name_index)->as_C_string());
537 int sig_index = pool->signature_ref_index_at(type_index);
538 cii->add_item(pool->symbol_at(sig_index)->as_C_string());
539 int argc = pool->bootstrap_argument_count_at(cp_index);
540 if (argc > 0) {
541 for (int arg_i = 0; arg_i < argc; arg_i++) {
542 int arg = pool->bootstrap_argument_index_at(cp_index, arg_i);
543 jbyte tag = pool->tag_at(arg).value();
544 if (tag == JVM_CONSTANT_MethodType) {
545 cii->add_item(pool->method_type_signature_at(arg)->as_C_string());
546 } else if (tag == JVM_CONSTANT_MethodHandle) {
547 cii->add_ref_kind(pool->method_handle_ref_kind_at(arg));
548 int callee_index = pool->method_handle_klass_index_at(arg);
549 Klass* callee = pool->klass_at(callee_index, CHECK);
550 cii->add_item(callee->name()->as_C_string());
551 cii->add_item(pool->method_handle_name_ref_at(arg)->as_C_string());
552 cii->add_item(pool->method_handle_signature_ref_at(arg)->as_C_string());
553 } else {
554 ShouldNotReachHere();
555 }
556 }
557 }
558 }
559
560 bool ClassListParser::is_matching_cp_entry(const constantPoolHandle &pool, int cp_index, TRAPS) {
561 ResourceMark rm(THREAD);
562 CDSIndyInfo cii;
563 populate_cds_indy_info(pool, cp_index, &cii, CHECK_0);
564 GrowableArray<const char*>* items = cii.items();
565 int indy_info_offset = 1;
566 if (_indy_items->length() - indy_info_offset != items->length()) {
567 return false;
568 }
569 for (int i = 0; i < items->length(); i++) {
570 if (strcmp(_indy_items->at(i + indy_info_offset), items->at(i)) != 0) {
571 return false;
572 }
573 }
574 return true;
575 }
576
577 void ClassListParser::resolve_indy(JavaThread* current, Symbol* class_name_symbol) {
578 ExceptionMark em(current);
579 JavaThread* THREAD = current; // For exception macros.
580 ClassListParser::resolve_indy_impl(class_name_symbol, THREAD);
581 if (HAS_PENDING_EXCEPTION) {
582 ResourceMark rm(current);
583 char* ex_msg = (char*)"";
584 oop message = java_lang_Throwable::message(PENDING_EXCEPTION);
585 if (message != nullptr) {
586 ex_msg = java_lang_String::as_utf8_string(message);
587 }
588 log_warning(cds)("resolve_indy for class %s has encountered exception: %s %s",
589 class_name_symbol->as_C_string(),
590 PENDING_EXCEPTION->klass()->external_name(),
591 ex_msg);
592 CLEAR_PENDING_EXCEPTION;
593 }
594 }
595
596 void ClassListParser::resolve_indy_impl(Symbol* class_name_symbol, TRAPS) {
597 Handle class_loader(THREAD, SystemDictionary::java_system_loader());
598 Handle protection_domain;
599 Klass* klass = SystemDictionary::resolve_or_fail(class_name_symbol, class_loader, protection_domain, true, CHECK);
600 if (klass->is_instance_klass()) {
601 InstanceKlass* ik = InstanceKlass::cast(klass);
602 MetaspaceShared::try_link_class(THREAD, ik);
603 if (!ik->is_linked()) {
604 // Verification of ik has failed
605 return;
606 }
607
608 ConstantPool* cp = ik->constants();
609 ConstantPoolCache* cpcache = cp->cache();
610 bool found = false;
611 for (int indy_index = 0; indy_index < cpcache->resolved_indy_entries_length(); indy_index++) {
612 int pool_index = cpcache->resolved_indy_entry_at(indy_index)->constant_pool_index();
613 constantPoolHandle pool(THREAD, cp);
614 BootstrapInfo bootstrap_specifier(pool, pool_index, indy_index);
615 Handle bsm = bootstrap_specifier.resolve_bsm(CHECK);
616 if (!SystemDictionaryShared::is_supported_invokedynamic(&bootstrap_specifier)) {
617 log_debug(cds, lambda)("is_supported_invokedynamic check failed for cp_index %d", pool_index);
618 continue;
619 }
620 bool matched = is_matching_cp_entry(pool, pool_index, CHECK);
621 if (matched) {
622 found = true;
623 CallInfo info;
624 bool is_done = bootstrap_specifier.resolve_previously_linked_invokedynamic(info, CHECK);
625 if (!is_done) {
626 // resolve it
627 Handle recv;
628 LinkResolver::resolve_invoke(info,
629 recv,
630 pool,
631 indy_index,
632 Bytecodes::_invokedynamic, CHECK);
633 break;
634 }
635 cpcache->set_dynamic_call(info, indy_index);
636 }
637 }
638 if (!found) {
639 ResourceMark rm(THREAD);
640 log_warning(cds)("No invoke dynamic constant pool entry can be found for class %s. The classlist is probably out-of-date.",
641 class_name_symbol->as_C_string());
642 }
643 }
644 }
645
646 Klass* ClassListParser::load_current_class(Symbol* class_name_symbol, TRAPS) {
647 Klass* klass;
648 if (!is_loading_from_source()) {
649 // Load classes for the boot/platform/app loaders only.
650 if (is_super_specified()) {
651 error("If source location is not specified, super class must not be specified");
652 }
653 if (are_interfaces_specified()) {
654 error("If source location is not specified, interface(s) must not be specified");
655 }
656
657 if (Signature::is_array(class_name_symbol)) {
658 // array classes are not supported in class list.
659 THROW_NULL(vmSymbols::java_lang_ClassNotFoundException());
660 }
661
662 JavaValue result(T_OBJECT);
663 // Call java_system_loader().loadClass() directly, which will
664 // delegate to the correct loader (boot, platform or app) depending on
665 // the package name.
666
667 // ClassLoader.loadClass() wants external class name format, i.e., convert '/' chars to '.'
668 Handle ext_class_name = java_lang_String::externalize_classname(class_name_symbol, CHECK_NULL);
669 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
670
671 JavaCalls::call_virtual(&result,
672 loader, //SystemDictionary::java_system_loader(),
673 vmClasses::ClassLoader_klass(),
674 vmSymbols::loadClass_name(),
675 vmSymbols::string_class_signature(),
676 ext_class_name,
677 CHECK_NULL);
678
679 assert(result.get_type() == T_OBJECT, "just checking");
680 oop obj = result.get_oop();
681 assert(obj != nullptr, "jdk.internal.loader.BuiltinClassLoader::loadClass never returns null");
682 klass = java_lang_Class::as_Klass(obj);
683 } else {
684 // If "source:" tag is specified, all super class and super interfaces must be specified in the
685 // class list file.
686 klass = load_class_from_source(class_name_symbol, CHECK_NULL);
687 }
688
689 assert(klass != nullptr, "exception should have been thrown");
690 assert(klass->is_instance_klass(), "array classes should have been filtered out");
691
692 if (is_id_specified()) {
693 InstanceKlass* ik = InstanceKlass::cast(klass);
694 int id = this->id();
695 SystemDictionaryShared::update_shared_entry(ik, id);
696 bool created;
697 id2klass_table()->put_if_absent(id, ik, &created);
698 if (!created) {
699 error("Duplicated ID %d for class %s", id, _class_name);
700 }
701 if (id2klass_table()->maybe_grow()) {
702 log_info(cds, hashtables)("Expanded id2klass_table() to %d", id2klass_table()->table_size());
703 }
704 }
705
706 return klass;
707 }
708
709 bool ClassListParser::is_loading_from_source() {
710 return (_source != nullptr);
711 }
712
713 InstanceKlass* ClassListParser::lookup_class_by_id(int id) {
714 InstanceKlass** klass_ptr = id2klass_table()->get(id);
715 if (klass_ptr == nullptr) {
716 error("Class ID %d has not been defined", id);
717 }
718 assert(*klass_ptr != nullptr, "must be");
719 return *klass_ptr;
720 }
721
722
723 InstanceKlass* ClassListParser::lookup_super_for_current_class(Symbol* super_name) {
724 if (!is_loading_from_source()) {
725 return nullptr;
726 }
727
728 InstanceKlass* k = lookup_class_by_id(super());
729 if (super_name != k->name()) {
730 error("The specified super class %s (id %d) does not match actual super class %s",
731 k->name()->as_klass_external_name(), super(),
732 super_name->as_klass_external_name());
733 }
734 return k;
735 }
736
737 InstanceKlass* ClassListParser::lookup_interface_for_current_class(Symbol* interface_name) {
738 if (!is_loading_from_source()) {
739 return nullptr;
740 }
741
742 const int n = _interfaces->length();
743 if (n == 0) {
744 error("Class %s implements the interface %s, but no interface has been specified in the input line",
745 _class_name, interface_name->as_klass_external_name());
746 ShouldNotReachHere();
747 }
748
749 int i;
750 for (i=0; i<n; i++) {
751 InstanceKlass* k = lookup_class_by_id(_interfaces->at(i));
752 if (interface_name == k->name()) {
753 return k;
754 }
755 }
756
757 // interface_name is not specified by the "interfaces:" keyword.
758 print_specified_interfaces();
759 error("The interface %s implemented by class %s does not match any of the specified interface IDs",
760 interface_name->as_klass_external_name(), _class_name);
761 ShouldNotReachHere();
762 return nullptr;
763 }
764
765 InstanceKlass* ClassListParser::find_builtin_class_helper(JavaThread* current, Symbol* class_name_symbol, oop class_loader_oop) {
766 Handle class_loader(current, class_loader_oop);
767 Handle protection_domain;
768 return SystemDictionary::find_instance_klass(current, class_name_symbol, class_loader, protection_domain);
769 }
770
771 InstanceKlass* ClassListParser::find_builtin_class(JavaThread* current, const char* class_name) {
772 TempNewSymbol class_name_symbol = SymbolTable::new_symbol(class_name);
773 InstanceKlass* ik;
774
775 if ( (ik = find_builtin_class_helper(current, class_name_symbol, nullptr)) != nullptr
776 || (ik = find_builtin_class_helper(current, class_name_symbol, SystemDictionary::java_platform_loader())) != nullptr
777 || (ik = find_builtin_class_helper(current, class_name_symbol, SystemDictionary::java_system_loader())) != nullptr) {
778 return ik;
779 } else {
780 return nullptr;
781 }
782 }
783
784 void ClassListParser::parse_constant_pool_tag() {
785 if (parse_lambda_forms_invokers_only()) {
786 return;
787 }
788
789 JavaThread* THREAD = JavaThread::current();
790 skip_whitespaces();
791 char* class_name = _token;
792 skip_non_whitespaces();
793 *_token = '\0';
794 _token ++;
795
796 InstanceKlass* ik = find_builtin_class(THREAD, class_name);
797 if (ik == nullptr) {
798 _token = class_name;
799 if (strstr(class_name, "/$Proxy") != nullptr ||
800 strstr(class_name, "MethodHandle$Species_") != nullptr) {
801 // ignore -- TODO: we should filter these out in classListWriter.cpp
802 } else {
803 constant_pool_resolution_warning("class %s is not (yet) loaded by one of the built-in loaders", class_name);
804 }
805 return;
806 }
807
808 ResourceMark rm(THREAD);
809 constantPoolHandle cp(THREAD, ik->constants());
810 GrowableArray<bool> preresolve_list(cp->length(), cp->length(), false);
811 bool preresolve_class = false;
812 bool preresolve_fmi = false;
813 bool preresolve_indy = false;
814
815 while (*_token) {
816 int cp_index;
817 skip_whitespaces();
818 parse_uint(&cp_index);
819 if (cp_index < 1 || cp_index >= cp->length()) {
820 constant_pool_resolution_warning("Invalid constant pool index %d", cp_index);
821 return;
822 } else {
823 preresolve_list.at_put(cp_index, true);
824 }
825 constantTag cp_tag = cp->tag_at(cp_index);
826 switch (cp_tag.value()) {
827 case JVM_CONSTANT_UnresolvedClass:
828 preresolve_class = true;
829 break;
830 case JVM_CONSTANT_UnresolvedClassInError:
831 case JVM_CONSTANT_Class:
832 // ignore
833 break;
834 case JVM_CONSTANT_Fieldref:
835 case JVM_CONSTANT_Methodref:
836 case JVM_CONSTANT_InterfaceMethodref:
837 preresolve_fmi = true;
838 break;
839 break;
840 default:
841 constant_pool_resolution_warning("Unsupported constant pool index %d: %s (type=%d)",
842 cp_index, cp_tag.internal_name(), cp_tag.value());
843 return;
844 }
845 }
846
847 if (preresolve_class) {
848 ClassPrelinker::preresolve_class_cp_entries(THREAD, ik, &preresolve_list);
849 }
850 if (preresolve_fmi) {
851 ClassPrelinker::preresolve_field_and_method_cp_entries(THREAD, ik, &preresolve_list);
852 }
853 }