1 /*
2 * Copyright (c) 1997, 2023, 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/archiveBuilder.hpp"
27 #include "cds/archiveHeapLoader.hpp"
28 #include "cds/heapShared.hpp"
29 #include "cds/metaspaceShared.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classLoaderData.inline.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/javaClassesImpl.hpp"
34 #include "classfile/javaThreadStatus.hpp"
35 #include "classfile/moduleEntry.hpp"
36 #include "classfile/stringTable.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/vmClasses.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "code/debugInfo.hpp"
42 #include "code/dependencyContext.hpp"
43 #include "code/pcDesc.hpp"
44 #include "gc/shared/collectedHeap.inline.hpp"
45 #include "interpreter/interpreter.hpp"
46 #include "interpreter/linkResolver.hpp"
47 #include "jvm.h"
48 #include "logging/log.hpp"
49 #include "logging/logStream.hpp"
50 #include "memory/oopFactory.hpp"
51 #include "memory/resourceArea.hpp"
52 #include "memory/universe.hpp"
53 #include "oops/fieldInfo.hpp"
54 #include "oops/fieldStreams.inline.hpp"
55 #include "oops/instanceKlass.inline.hpp"
56 #include "oops/instanceMirrorKlass.hpp"
57 #include "oops/klass.hpp"
58 #include "oops/klass.inline.hpp"
59 #include "oops/method.inline.hpp"
60 #include "oops/objArrayKlass.hpp"
61 #include "oops/objArrayOop.inline.hpp"
62 #include "oops/oopCast.inline.hpp"
63 #include "oops/oop.inline.hpp"
64 #include "oops/symbol.hpp"
65 #include "oops/recordComponent.hpp"
66 #include "oops/typeArrayOop.inline.hpp"
67 #include "prims/jvmtiExport.hpp"
68 #include "prims/methodHandles.hpp"
69 #include "prims/resolvedMethodTable.hpp"
70 #include "runtime/continuationEntry.inline.hpp"
71 #include "runtime/continuationJavaClasses.inline.hpp"
72 #include "runtime/fieldDescriptor.inline.hpp"
73 #include "runtime/frame.inline.hpp"
74 #include "runtime/handles.inline.hpp"
75 #include "runtime/handshake.hpp"
76 #include "runtime/init.hpp"
77 #include "runtime/interfaceSupport.inline.hpp"
78 #include "runtime/java.hpp"
79 #include "runtime/javaCalls.hpp"
80 #include "runtime/javaThread.hpp"
81 #include "runtime/jniHandles.inline.hpp"
82 #include "runtime/reflectionUtils.hpp"
83 #include "runtime/safepoint.hpp"
84 #include "runtime/safepointVerifiers.hpp"
85 #include "runtime/threadSMR.hpp"
86 #include "runtime/vframe.inline.hpp"
87 #include "runtime/vm_version.hpp"
88 #include "utilities/align.hpp"
89 #include "utilities/globalDefinitions.hpp"
90 #include "utilities/growableArray.hpp"
91 #include "utilities/preserveException.hpp"
92 #include "utilities/utf8.hpp"
93 #if INCLUDE_JVMCI
94 #include "jvmci/jvmciJavaClasses.hpp"
95 #endif
96
97 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
98 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
99
100 InjectedField JavaClasses::_injected_fields[] = {
101 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
102 };
103
104 // Register native methods of Object
105 void java_lang_Object::register_natives(TRAPS) {
106 InstanceKlass* obj = vmClasses::Object_klass();
107 Method::register_native(obj, vmSymbols::hashCode_name(),
108 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
109 Method::register_native(obj, vmSymbols::wait_name(),
110 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
111 Method::register_native(obj, vmSymbols::notify_name(),
112 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
113 Method::register_native(obj, vmSymbols::notifyAll_name(),
114 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
115 Method::register_native(obj, vmSymbols::clone_name(),
116 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
117 }
118
119 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
120 return _injected_fields[(int)id].compute_offset();
121 }
122
123 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
124 *field_count = 0;
125
126 vmSymbolID sid = vmSymbols::find_sid(class_name);
127 if (sid == vmSymbolID::NO_SID) {
128 // Only well known classes can inject fields
129 return nullptr;
130 }
131
132 int count = 0;
133 int start = -1;
134
135 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
136 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
137 count++; \
138 if (start == -1) { \
139 start = (int)InjectedFieldID::klass##_##name##_enum; \
140 } \
141 }
142 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
143 #undef LOOKUP_INJECTED_FIELD
144
145 if (start != -1) {
146 *field_count = count;
147 return _injected_fields + start;
148 }
149 return nullptr;
150 }
151
152
153 // Helpful routine for computing field offsets at run time rather than hardcoding them
154 // Finds local fields only, including static fields. Static field offsets are from the
155 // beginning of the mirror.
156 void JavaClasses::compute_offset(int &dest_offset,
157 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
158 bool is_static) {
159 fieldDescriptor fd;
160 if (ik == nullptr) {
161 ResourceMark rm;
162 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
163 vm_exit_during_initialization("Invalid layout of well-known class");
164 }
165
166 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
167 ResourceMark rm;
168 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
169 name_symbol->as_C_string(), signature_symbol->as_C_string());
170 #ifndef PRODUCT
171 // Prints all fields and offsets
172 Log(class) lt;
173 LogStream ls(lt.error());
174 ik->print_on(&ls);
175 #endif //PRODUCT
176 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
177 }
178 dest_offset = fd.offset();
179 }
180
181 // Overloading to pass name as a string.
182 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
183 const char* name_string, Symbol* signature_symbol,
184 bool is_static) {
185 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
186 if (name == nullptr) {
187 ResourceMark rm;
188 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
189 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
190 }
191 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
192 }
193
194 // java_lang_String
195
196 int java_lang_String::_value_offset;
197 int java_lang_String::_hash_offset;
198 int java_lang_String::_hashIsZero_offset;
199 int java_lang_String::_coder_offset;
200 int java_lang_String::_flags_offset;
201
202 bool java_lang_String::_initialized;
203
204
205 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
206 uint8_t* addr = flags_addr(java_string);
207 uint8_t value = Atomic::load(addr);
208 while ((value & flag_mask) == 0) {
209 uint8_t old_value = value;
210 value |= flag_mask;
211 value = Atomic::cmpxchg(addr, old_value, value);
212 if (value == old_value) return false; // Flag bit changed from 0 to 1.
213 }
214 return true; // Flag bit is already 1.
215 }
216
217 #define STRING_FIELDS_DO(macro) \
218 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
219 macro(_hash_offset, k, "hash", int_signature, false); \
220 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
221 macro(_coder_offset, k, "coder", byte_signature, false);
222
223 void java_lang_String::compute_offsets() {
224 if (_initialized) {
225 return;
226 }
227
228 InstanceKlass* k = vmClasses::String_klass();
229 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
230 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
231
232 _initialized = true;
233 }
234
235 #if INCLUDE_CDS
236 void java_lang_String::serialize_offsets(SerializeClosure* f) {
237 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
238 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
239 f->do_bool(&_initialized);
240 }
241 #endif
242
243 class CompactStringsFixup : public FieldClosure {
244 private:
245 bool _value;
246
247 public:
248 CompactStringsFixup(bool value) : _value(value) {}
249
250 void do_field(fieldDescriptor* fd) {
251 if (fd->name() == vmSymbols::compact_strings_name()) {
252 oop mirror = fd->field_holder()->java_mirror();
253 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
254 assert(mirror != nullptr, "String must have mirror already");
255 mirror->bool_field_put(fd->offset(), _value);
256 }
257 }
258 };
259
260 void java_lang_String::set_compact_strings(bool value) {
261 CompactStringsFixup fix(value);
262 vmClasses::String_klass()->do_local_static_fields(&fix);
263 }
264
265 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
266 assert(_initialized, "Must be initialized");
267 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
268
269 // Create the String object first, so there's a chance that the String
270 // and the char array it points to end up in the same cache line.
271 oop obj;
272 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
273
274 // Create the char array. The String object must be handlized here
275 // because GC can happen as a result of the allocation attempt.
276 Handle h_obj(THREAD, obj);
277 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
278 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
279
280 // Point the String at the char array
281 obj = h_obj();
282 set_value(obj, buffer);
283 // No need to zero the offset, allocation zero'ed the entire String object
284 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
285 return h_obj;
286 }
287
288 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
289 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
290 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
291 typeArrayOop buffer = value(h_obj());
292 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
293 if (is_latin1) {
294 for (int index = 0; index < length; index++) {
295 buffer->byte_at_put(index, (jbyte)unicode[index]);
296 }
297 } else {
298 for (int index = 0; index < length; index++) {
299 buffer->char_at_put(index, unicode[index]);
300 }
301 }
302
303 #ifdef ASSERT
304 {
305 ResourceMark rm;
306 char* expected = UNICODE::as_utf8(unicode, length);
307 char* actual = as_utf8_string(h_obj());
308 if (strcmp(expected, actual) != 0) {
309 fatal("Unicode conversion failure: %s --> %s", expected, actual);
310 }
311 }
312 #endif
313
314 return h_obj;
315 }
316
317 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
318 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
319 return h_obj();
320 }
321
322 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
323 if (utf8_str == nullptr) {
324 return Handle();
325 }
326 bool has_multibyte, is_latin1;
327 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
328 if (!CompactStrings) {
329 has_multibyte = true;
330 is_latin1 = false;
331 }
332
333 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
334 if (length > 0) {
335 if (!has_multibyte) {
336 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
337 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
338 } else if (is_latin1) {
339 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
340 } else {
341 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
342 }
343 }
344
345 #ifdef ASSERT
346 // This check is too strict when the input string is not a valid UTF8.
347 // For example, it may be created with arbitrary content via jni_NewStringUTF.
348 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) {
349 ResourceMark rm;
350 const char* expected = utf8_str;
351 char* actual = as_utf8_string(h_obj());
352 if (strcmp(expected, actual) != 0) {
353 fatal("String conversion failure: %s --> %s", expected, actual);
354 }
355 }
356 #endif
357
358 return h_obj;
359 }
360
361 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
362 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
363 return h_obj();
364 }
365
366 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
367 const char* utf8_str = (char*)symbol->bytes();
368 int utf8_len = symbol->utf8_length();
369
370 bool has_multibyte, is_latin1;
371 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
372 if (!CompactStrings) {
373 has_multibyte = true;
374 is_latin1 = false;
375 }
376
377 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
378 if (length > 0) {
379 if (!has_multibyte) {
380 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
381 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
382 } else if (is_latin1) {
383 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
384 } else {
385 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
386 }
387 }
388
389 #ifdef ASSERT
390 {
391 ResourceMark rm;
392 const char* expected = symbol->as_utf8();
393 char* actual = as_utf8_string(h_obj());
394 if (strncmp(expected, actual, utf8_len) != 0) {
395 fatal("Symbol conversion failure: %s --> %s", expected, actual);
396 }
397 }
398 #endif
399
400 return h_obj;
401 }
402
403 // Converts a C string to a Java String based on current encoding
404 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
405 assert(str != nullptr, "bad arguments");
406
407 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
408 static to_java_string_fn_t _to_java_string_fn = nullptr;
409
410 if (_to_java_string_fn == nullptr) {
411 void *lib_handle = os::native_java_library();
412 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
413 #if defined(_WIN32) && !defined(_WIN64)
414 if (_to_java_string_fn == nullptr) {
415 // On 32 bit Windows, also try __stdcall decorated name
416 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
417 }
418 #endif
419 if (_to_java_string_fn == nullptr) {
420 fatal("JNU_NewStringPlatform missing");
421 }
422 }
423
424 jstring js = nullptr;
425 {
426 JavaThread* thread = THREAD;
427 HandleMark hm(thread);
428 ThreadToNativeFromVM ttn(thread);
429 js = (_to_java_string_fn)(thread->jni_environment(), str);
430 }
431
432 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
433 JNIHandles::destroy_local(js); // destroy local JNIHandle.
434 return native_platform_string;
435 }
436
437 // Converts a Java String to a native C string that can be used for
438 // native OS calls.
439 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
440 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
441 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
442
443 if (_to_platform_string_fn == nullptr) {
444 void *lib_handle = os::native_java_library();
445 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
446 if (_to_platform_string_fn == nullptr) {
447 fatal("GetStringPlatformChars missing");
448 }
449 }
450
451 char *native_platform_string;
452 jstring js;
453 { JavaThread* thread = THREAD;
454 js = (jstring) JNIHandles::make_local(thread, java_string());
455 HandleMark hm(thread);
456 ThreadToNativeFromVM ttn(thread);
457 JNIEnv *env = thread->jni_environment();
458 bool is_copy;
459 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
460 assert(is_copy == JNI_TRUE, "is_copy value changed");
461 }
462
463 // Uses a store barrier and therefore needs to be in vm state
464 JNIHandles::destroy_local(js);
465
466 return native_platform_string;
467 }
468
469 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
470 ResourceMark rm(THREAD);
471 return create_from_str(java_name->as_klass_external_name(), THREAD);
472 }
473
474 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
475 jchar* result = as_unicode_string_or_null(java_string, length);
476 if (result == nullptr) {
477 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
478 }
479 return result;
480 }
481
482 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
483 typeArrayOop value = java_lang_String::value(java_string);
484 length = java_lang_String::length(java_string, value);
485 bool is_latin1 = java_lang_String::is_latin1(java_string);
486
487 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
488 if (result != nullptr) {
489 if (!is_latin1) {
490 for (int index = 0; index < length; index++) {
491 result[index] = value->char_at(index);
492 }
493 } else {
494 for (int index = 0; index < length; index++) {
495 result[index] = ((jchar) value->byte_at(index)) & 0xff;
496 }
497 }
498 }
499 return result;
500 }
501
502 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
503 // The hash and hashIsZero fields are subject to a benign data race,
504 // making it crucial to ensure that any observable result of the
505 // calculation in this method stays correct under any possible read of
506 // these fields. Necessary restrictions to allow this to be correct
507 // without explicit memory fences or similar concurrency primitives is
508 // that we can ever only write to one of these two fields for a given
509 // String instance, and that the computation is idempotent and derived
510 // from immutable state
511 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
512 if (java_lang_String::hash_is_set(java_string)) {
513 return java_string->int_field(_hash_offset);
514 }
515
516 typeArrayOop value = java_lang_String::value(java_string);
517 int length = java_lang_String::length(java_string, value);
518 bool is_latin1 = java_lang_String::is_latin1(java_string);
519
520 unsigned int hash = 0;
521 if (length > 0) {
522 if (is_latin1) {
523 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
524 } else {
525 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
526 }
527 }
528
529 if (update) {
530 if (hash != 0) {
531 java_string->int_field_put(_hash_offset, hash);
532 } else {
533 java_string->bool_field_put(_hashIsZero_offset, true);
534 }
535 }
536 return hash;
537 }
538
539 unsigned int java_lang_String::hash_code(oop java_string) {
540 return hash_code_impl(java_string, /*update=*/true);
541 }
542
543 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
544 return hash_code_impl(java_string, /*update=*/false);
545 }
546
547
548 char* java_lang_String::as_quoted_ascii(oop java_string) {
549 typeArrayOop value = java_lang_String::value(java_string);
550 int length = java_lang_String::length(java_string, value);
551 bool is_latin1 = java_lang_String::is_latin1(java_string);
552
553 if (length == 0) return nullptr;
554
555 char* result;
556 int result_length;
557 if (!is_latin1) {
558 jchar* base = value->char_at_addr(0);
559 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
560 result = NEW_RESOURCE_ARRAY(char, result_length);
561 UNICODE::as_quoted_ascii(base, length, result, result_length);
562 } else {
563 jbyte* base = value->byte_at_addr(0);
564 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
565 result = NEW_RESOURCE_ARRAY(char, result_length);
566 UNICODE::as_quoted_ascii(base, length, result, result_length);
567 }
568 assert(result_length >= length + 1, "must not be shorter");
569 assert(result_length == (int)strlen(result) + 1, "must match");
570 return result;
571 }
572
573 Symbol* java_lang_String::as_symbol(oop java_string) {
574 typeArrayOop value = java_lang_String::value(java_string);
575 int length = java_lang_String::length(java_string, value);
576 bool is_latin1 = java_lang_String::is_latin1(java_string);
577 if (!is_latin1) {
578 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
579 Symbol* sym = SymbolTable::new_symbol(base, length);
580 return sym;
581 } else {
582 ResourceMark rm;
583 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
584 const char* base = UNICODE::as_utf8(position, length);
585 Symbol* sym = SymbolTable::new_symbol(base, length);
586 return sym;
587 }
588 }
589
590 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
591 typeArrayOop value = java_lang_String::value(java_string);
592 int length = java_lang_String::length(java_string, value);
593 bool is_latin1 = java_lang_String::is_latin1(java_string);
594 if (!is_latin1) {
595 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
596 return SymbolTable::probe_unicode(base, length);
597 } else {
598 ResourceMark rm;
599 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
600 const char* base = UNICODE::as_utf8(position, length);
601 return SymbolTable::probe(base, length);
602 }
603 }
604
605 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
606 assert(value_equals(value, java_lang_String::value(java_string)),
607 "value must be same as java_lang_String::value(java_string)");
608 int length = java_lang_String::length(java_string, value);
609 if (length == 0) {
610 return 0;
611 }
612 if (!java_lang_String::is_latin1(java_string)) {
613 return UNICODE::utf8_length(value->char_at_addr(0), length);
614 } else {
615 return UNICODE::utf8_length(value->byte_at_addr(0), length);
616 }
617 }
618
619 int java_lang_String::utf8_length(oop java_string) {
620 typeArrayOop value = java_lang_String::value(java_string);
621 return utf8_length(java_string, value);
622 }
623
624 char* java_lang_String::as_utf8_string(oop java_string) {
625 int length;
626 return as_utf8_string(java_string, length);
627 }
628
629 char* java_lang_String::as_utf8_string(oop java_string, int& length) {
630 typeArrayOop value = java_lang_String::value(java_string);
631 length = java_lang_String::length(java_string, value);
632 bool is_latin1 = java_lang_String::is_latin1(java_string);
633 if (!is_latin1) {
634 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
635 return UNICODE::as_utf8(position, length);
636 } else {
637 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
638 return UNICODE::as_utf8(position, length);
639 }
640 }
641
642 // Uses a provided buffer if it's sufficiently large, otherwise allocates
643 // a resource array to fit
644 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) {
645 typeArrayOop value = java_lang_String::value(java_string);
646 int len = java_lang_String::length(java_string, value);
647 bool is_latin1 = java_lang_String::is_latin1(java_string);
648 if (!is_latin1) {
649 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
650 utf8_len = UNICODE::utf8_length(position, len);
651 if (utf8_len >= buflen) {
652 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
653 }
654 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
655 } else {
656 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
657 utf8_len = UNICODE::utf8_length(position, len);
658 if (utf8_len >= buflen) {
659 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
660 }
661 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
662 }
663 }
664
665 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
666 assert(value_equals(value, java_lang_String::value(java_string)),
667 "value must be same as java_lang_String::value(java_string)");
668 int length = java_lang_String::length(java_string, value);
669 bool is_latin1 = java_lang_String::is_latin1(java_string);
670 if (!is_latin1) {
671 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
672 return UNICODE::as_utf8(position, length, buf, buflen);
673 } else {
674 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
675 return UNICODE::as_utf8(position, length, buf, buflen);
676 }
677 }
678
679 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
680 typeArrayOop value = java_lang_String::value(java_string);
681 return as_utf8_string(java_string, value, buf, buflen);
682 }
683
684 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
685 typeArrayOop value = java_lang_String::value(java_string);
686 bool is_latin1 = java_lang_String::is_latin1(java_string);
687 assert(start + len <= java_lang_String::length(java_string), "just checking");
688 if (!is_latin1) {
689 jchar* position = value->char_at_addr(start);
690 return UNICODE::as_utf8(position, len);
691 } else {
692 jbyte* position = value->byte_at_addr(start);
693 return UNICODE::as_utf8(position, len);
694 }
695 }
696
697 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
698 assert(value_equals(value, java_lang_String::value(java_string)),
699 "value must be same as java_lang_String::value(java_string)");
700 assert(start + len <= java_lang_String::length(java_string), "just checking");
701 bool is_latin1 = java_lang_String::is_latin1(java_string);
702 if (!is_latin1) {
703 jchar* position = value->char_at_addr(start);
704 return UNICODE::as_utf8(position, len, buf, buflen);
705 } else {
706 jbyte* position = value->byte_at_addr(start);
707 return UNICODE::as_utf8(position, len, buf, buflen);
708 }
709 }
710
711 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
712 assert(java_string->klass() == vmClasses::String_klass(),
713 "must be java_string");
714 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
715 int length = java_lang_String::length(java_string, value);
716 if (length != len) {
717 return false;
718 }
719 bool is_latin1 = java_lang_String::is_latin1(java_string);
720 if (!is_latin1) {
721 for (int i = 0; i < len; i++) {
722 if (value->char_at(i) != chars[i]) {
723 return false;
724 }
725 }
726 } else {
727 for (int i = 0; i < len; i++) {
728 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
729 return false;
730 }
731 }
732 }
733 return true;
734 }
735
736 bool java_lang_String::equals(oop str1, oop str2) {
737 assert(str1->klass() == vmClasses::String_klass(),
738 "must be java String");
739 assert(str2->klass() == vmClasses::String_klass(),
740 "must be java String");
741 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
742 bool is_latin1 = java_lang_String::is_latin1(str1);
743 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
744 bool is_latin2 = java_lang_String::is_latin1(str2);
745
746 if (is_latin1 != is_latin2) {
747 // Strings with different coders are never equal.
748 return false;
749 }
750 return value_equals(value1, value2);
751 }
752
753 void java_lang_String::print(oop java_string, outputStream* st) {
754 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
755 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
756
757 if (value == nullptr) {
758 // This can happen if, e.g., printing a String
759 // object before its initializer has been called
760 st->print("nullptr");
761 return;
762 }
763
764 int length = java_lang_String::length(java_string, value);
765 bool is_latin1 = java_lang_String::is_latin1(java_string);
766
767 st->print("\"");
768 for (int index = 0; index < length; index++) {
769 jchar c = (!is_latin1) ? value->char_at(index) :
770 ((jchar) value->byte_at(index)) & 0xff;
771 if (c < ' ') {
772 st->print("\\x%02X", c); // print control characters e.g. \x0A
773 } else {
774 st->print("%c", c);
775 }
776 }
777 st->print("\"");
778 }
779
780 // java_lang_Class
781
782 int java_lang_Class::_klass_offset;
783 int java_lang_Class::_array_klass_offset;
784 int java_lang_Class::_oop_size_offset;
785 int java_lang_Class::_static_oop_field_count_offset;
786 int java_lang_Class::_class_loader_offset;
787 int java_lang_Class::_module_offset;
788 int java_lang_Class::_protection_domain_offset;
789 int java_lang_Class::_component_mirror_offset;
790 int java_lang_Class::_signers_offset;
791 int java_lang_Class::_name_offset;
792 int java_lang_Class::_source_file_offset;
793 int java_lang_Class::_classData_offset;
794 int java_lang_Class::_classRedefinedCount_offset;
795
796 bool java_lang_Class::_offsets_computed = false;
797 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
798 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
799
800 #ifdef ASSERT
801 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
802 assert(fd->has_initial_value(), "caller should have checked this");
803 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
804 // Can't use vmSymbols::string_signature() as fd->signature() may have been relocated
805 // during DumpSharedSpaces
806 assert(fd->signature()->equals("Ljava/lang/String;"), "just checking");
807 }
808 #endif
809
810 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
811 DEBUG_ONLY(assert_valid_static_string_field(fd);)
812 oop string = fd->string_initial_value(CHECK);
813 mirror()->obj_field_put(fd->offset(), string);
814 }
815
816 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
817 assert(fd->has_initial_value(), "caller should have checked this");
818 BasicType t = fd->field_type();
819 switch (t) {
820 case T_BYTE:
821 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
822 break;
823 case T_BOOLEAN:
824 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
825 break;
826 case T_CHAR:
827 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
828 break;
829 case T_SHORT:
830 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
831 break;
832 case T_INT:
833 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
834 break;
835 case T_FLOAT:
836 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
837 break;
838 case T_DOUBLE:
839 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
840 break;
841 case T_LONG:
842 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
843 break;
844 default:
845 // Illegal ConstantValue attribute in class file should have been
846 // caught during classfile parsing.
847 ShouldNotReachHere();
848 }
849 }
850
851 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
852 assert(mirror.not_null() && fd->is_static(), "just checking");
853 if (fd->has_initial_value()) {
854 if (fd->field_type() != T_OBJECT) {
855 initialize_static_primitive_field(fd, mirror);
856 } else {
857 initialize_static_string_field(fd, mirror, CHECK);
858 }
859 }
860 }
861
862 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
863 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
864
865 // If the offset was read from the shared archive, it was fixed up already
866 if (!k->is_shared()) {
867 if (k->is_instance_klass()) {
868 // During bootstrap, java.lang.Class wasn't loaded so static field
869 // offsets were computed without the size added it. Go back and
870 // update all the static field offsets to included the size.
871
872 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
873 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
874 // static fields offsets are updated in this array before reencoding everything into
875 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
876
877 int java_fields;
878 int injected_fields;
879 InstanceKlass* ik = InstanceKlass::cast(k);
880 GrowableArray<FieldInfo>* fields =
881 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
882 &java_fields, &injected_fields);
883 for (int i = 0; i < fields->length(); i++) {
884 FieldInfo* fi = fields->adr_at(i);
885 if (fi->access_flags().is_static()) {
886 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
887 }
888 }
889 Array<u1>* old_stream = ik->fieldinfo_stream();
890 assert(fields->length() == (java_fields + injected_fields), "Must be");
891 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
892 ik->set_fieldinfo_stream(new_fis);
893 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
894 }
895 }
896
897 if (k->is_shared() && k->has_archived_mirror_index()) {
898 if (ArchiveHeapLoader::is_in_use()) {
899 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
900 assert(present, "Missing archived mirror for %s", k->external_name());
901 return;
902 } else {
903 k->clear_java_mirror_handle();
904 k->clear_archived_mirror_index();
905 }
906 }
907 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
908 }
909
910 void java_lang_Class::initialize_mirror_fields(Klass* k,
911 Handle mirror,
912 Handle protection_domain,
913 Handle classData,
914 TRAPS) {
915 // Set protection domain also
916 set_protection_domain(mirror(), protection_domain());
917
918 // Initialize static fields
919 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
920
921 // Set classData
922 set_class_data(mirror(), classData());
923 }
924
925 // Set the java.lang.Module module field in the java_lang_Class mirror
926 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
927 if (module.is_null()) {
928 // During startup, the module may be null only if java.base has not been defined yet.
929 // Put the class on the fixup_module_list to patch later when the java.lang.Module
930 // for java.base is known. But note that since we captured the null module another
931 // thread may have completed that initialization.
932
933 bool javabase_was_defined = false;
934 {
935 MutexLocker m1(current, Module_lock);
936 // Keep list of classes needing java.base module fixup
937 if (!ModuleEntryTable::javabase_defined()) {
938 assert(k->java_mirror() != nullptr, "Class's mirror is null");
939 k->class_loader_data()->inc_keep_alive();
940 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
941 fixup_module_field_list()->push(k);
942 } else {
943 javabase_was_defined = true;
944 }
945 }
946
947 // If java.base was already defined then patch this particular class with java.base.
948 if (javabase_was_defined) {
949 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
950 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
951 "Setting class module field, " JAVA_BASE_NAME " should be defined");
952 Handle javabase_handle(current, javabase_entry->module());
953 set_module(mirror(), javabase_handle());
954 }
955 } else {
956 assert(Universe::is_module_initialized() ||
957 (ModuleEntryTable::javabase_defined() &&
958 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
959 "Incorrect java.lang.Module specification while creating mirror");
960 set_module(mirror(), module());
961 }
962 }
963
964 // Statically allocate fixup lists because they always get created.
965 void java_lang_Class::allocate_fixup_lists() {
966 GrowableArray<Klass*>* mirror_list =
967 new (mtClass) GrowableArray<Klass*>(40, mtClass);
968 set_fixup_mirror_list(mirror_list);
969
970 GrowableArray<Klass*>* module_list =
971 new (mtModule) GrowableArray<Klass*>(500, mtModule);
972 set_fixup_module_field_list(module_list);
973 }
974
975 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
976 Handle& mirror, Handle& comp_mirror, TRAPS) {
977 // Allocate mirror (java.lang.Class instance)
978 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
979 mirror = Handle(THREAD, mirror_oop);
980
981 // Setup indirection from mirror->klass
982 set_klass(mirror(), k);
983
984 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
985 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
986
987 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
988
989 // It might also have a component mirror. This mirror must already exist.
990 if (k->is_array_klass()) {
991 if (k->is_typeArray_klass()) {
992 BasicType type = TypeArrayKlass::cast(k)->element_type();
993 if (is_scratch) {
994 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
995 } else {
996 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
997 }
998 } else {
999 assert(k->is_objArray_klass(), "Must be");
1000 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1001 assert(element_klass != nullptr, "Must have an element klass");
1002 if (is_scratch) {
1003 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1004 } else {
1005 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1006 }
1007 }
1008 assert(comp_mirror() != nullptr, "must have a mirror");
1009
1010 // Two-way link between the array klass and its component mirror:
1011 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1012 set_component_mirror(mirror(), comp_mirror());
1013 // See below for ordering dependencies between field array_klass in component mirror
1014 // and java_mirror in this klass.
1015 } else {
1016 assert(k->is_instance_klass(), "Must be");
1017
1018 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1019 if (HAS_PENDING_EXCEPTION) {
1020 // If any of the fields throws an exception like OOM remove the klass field
1021 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1022 // This mirror looks like a primitive type, which logically it is because it
1023 // it represents no class.
1024 set_klass(mirror(), nullptr);
1025 return;
1026 }
1027 }
1028 }
1029
1030 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1031 Handle module, Handle protection_domain,
1032 Handle classData, TRAPS) {
1033 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1034 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1035
1036 // Use this moment of initialization to cache modifier_flags also,
1037 // to support Class.getModifiers(). Instance classes recalculate
1038 // the cached flags after the class file is parsed, but before the
1039 // class is put into the system dictionary.
1040 int computed_modifiers = k->compute_modifier_flags();
1041 k->set_modifier_flags(computed_modifiers);
1042 // Class_klass has to be loaded because it is used to allocate
1043 // the mirror.
1044 if (vmClasses::Class_klass_loaded()) {
1045 Handle mirror;
1046 Handle comp_mirror;
1047
1048 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1049
1050 // set the classLoader field in the java_lang_Class instance
1051 assert(class_loader() == k->class_loader(), "should be same");
1052 set_class_loader(mirror(), class_loader());
1053
1054 // Setup indirection from klass->mirror
1055 // after any exceptions can happen during allocations.
1056 k->set_java_mirror(mirror);
1057
1058 // Set the module field in the java_lang_Class instance. This must be done
1059 // after the mirror is set.
1060 set_mirror_module_field(THREAD, k, mirror, module);
1061
1062 if (comp_mirror() != nullptr) {
1063 // Set after k->java_mirror() is published, because compiled code running
1064 // concurrently doesn't expect a k to have a null java_mirror.
1065 release_set_array_klass(comp_mirror(), k);
1066 }
1067 if (DumpSharedSpaces) {
1068 create_scratch_mirror(k, CHECK);
1069 }
1070 } else {
1071 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1072 fixup_mirror_list()->push(k);
1073 }
1074 }
1075
1076 #if INCLUDE_CDS_JAVA_HEAP
1077 // The "scratch mirror" stores the states of the mirror object that can be
1078 // decided at dump time (such as the initial values of the static fields, the
1079 // component mirror, etc). At runtime, more information is added to it by
1080 // java_lang_Class::restore_archived_mirror().
1081 //
1082 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1083 // produces the same result as /*runtime*/create_mirror().
1084 //
1085 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1086 // latter may contain dumptime-specific information that cannot be archived
1087 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1088 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1089 if (k->class_loader() != nullptr &&
1090 k->class_loader() != SystemDictionary::java_platform_loader() &&
1091 k->class_loader() != SystemDictionary::java_system_loader()) {
1092 // We only archive the mirrors of classes loaded by the built-in loaders
1093 return;
1094 }
1095
1096 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1097 Handle mirror;
1098 Handle comp_mirror;
1099 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1100
1101 if (comp_mirror() != nullptr) {
1102 release_set_array_klass(comp_mirror(), k);
1103 }
1104
1105 HeapShared::set_scratch_java_mirror(k, mirror());
1106 }
1107
1108 // Returns true if the mirror is updated, false if no archived mirror
1109 // data is present. After the archived mirror object is restored, the
1110 // shared klass' _has_raw_archived_mirror flag is cleared.
1111 bool java_lang_Class::restore_archived_mirror(Klass *k,
1112 Handle class_loader, Handle module,
1113 Handle protection_domain, TRAPS) {
1114 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1115 // see more details in vmClasses::resolve_all().
1116 if (!vmClasses::Class_klass_loaded()) {
1117 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1118 fixup_mirror_list()->push(k);
1119 return true;
1120 }
1121
1122 oop m = k->archived_java_mirror();
1123 assert(m != nullptr, "must have stored non-null archived mirror");
1124
1125 // Sanity: clear it now to prevent re-initialization if any of the following fails
1126 k->clear_archived_mirror_index();
1127
1128 // mirror is archived, restore
1129 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1130 assert(as_Klass(m) == k, "must be");
1131 Handle mirror(THREAD, m);
1132
1133 if (!k->is_array_klass()) {
1134 // - local static final fields with initial values were initialized at dump time
1135
1136 if (protection_domain.not_null()) {
1137 set_protection_domain(mirror(), protection_domain());
1138 }
1139 }
1140
1141 assert(class_loader() == k->class_loader(), "should be same");
1142 if (class_loader.not_null()) {
1143 set_class_loader(mirror(), class_loader());
1144 }
1145
1146 k->set_java_mirror(mirror);
1147
1148 set_mirror_module_field(THREAD, k, mirror, module);
1149
1150 if (log_is_enabled(Trace, cds, heap, mirror)) {
1151 ResourceMark rm(THREAD);
1152 log_trace(cds, heap, mirror)(
1153 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1154 }
1155
1156 return true;
1157 }
1158 #endif // INCLUDE_CDS_JAVA_HEAP
1159
1160 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1161 assert(_module_offset != 0, "must have been computed already");
1162 set_module(k->java_mirror(), module());
1163 }
1164
1165 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1166 assert(_oop_size_offset != 0, "must be set");
1167 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1168 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1169 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1170 }
1171
1172 int java_lang_Class::static_oop_field_count(oop java_class) {
1173 assert(_static_oop_field_count_offset != 0, "must be set");
1174 return java_class->int_field(_static_oop_field_count_offset);
1175 }
1176
1177 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1178 assert(_static_oop_field_count_offset != 0, "must be set");
1179 java_class->int_field_put(_static_oop_field_count_offset, size);
1180 }
1181
1182 oop java_lang_Class::protection_domain(oop java_class) {
1183 assert(_protection_domain_offset != 0, "must be set");
1184 return java_class->obj_field(_protection_domain_offset);
1185 }
1186 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1187 assert(_protection_domain_offset != 0, "must be set");
1188 java_class->obj_field_put(_protection_domain_offset, pd);
1189 }
1190
1191 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1192 assert(_component_mirror_offset != 0, "must be set");
1193 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1194 }
1195 oop java_lang_Class::component_mirror(oop java_class) {
1196 assert(_component_mirror_offset != 0, "must be set");
1197 return java_class->obj_field(_component_mirror_offset);
1198 }
1199
1200 objArrayOop java_lang_Class::signers(oop java_class) {
1201 assert(_signers_offset != 0, "must be set");
1202 return (objArrayOop)java_class->obj_field(_signers_offset);
1203 }
1204 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1205 assert(_signers_offset != 0, "must be set");
1206 java_class->obj_field_put(_signers_offset, signers);
1207 }
1208
1209 oop java_lang_Class::class_data(oop java_class) {
1210 assert(_classData_offset != 0, "must be set");
1211 return java_class->obj_field(_classData_offset);
1212 }
1213 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1214 assert(_classData_offset != 0, "must be set");
1215 java_class->obj_field_put(_classData_offset, class_data);
1216 }
1217
1218 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1219 assert(_class_loader_offset != 0, "offsets should have been initialized");
1220 java_class->obj_field_put(_class_loader_offset, loader);
1221 }
1222
1223 oop java_lang_Class::class_loader(oop java_class) {
1224 assert(_class_loader_offset != 0, "must be set");
1225 return java_class->obj_field(_class_loader_offset);
1226 }
1227
1228 oop java_lang_Class::module(oop java_class) {
1229 assert(_module_offset != 0, "must be set");
1230 return java_class->obj_field(_module_offset);
1231 }
1232
1233 void java_lang_Class::set_module(oop java_class, oop module) {
1234 assert(_module_offset != 0, "must be set");
1235 java_class->obj_field_put(_module_offset, module);
1236 }
1237
1238 oop java_lang_Class::name(Handle java_class, TRAPS) {
1239 assert(_name_offset != 0, "must be set");
1240 oop o = java_class->obj_field(_name_offset);
1241 if (o == nullptr) {
1242 o = StringTable::intern(as_external_name(java_class()), THREAD);
1243 java_class->obj_field_put(_name_offset, o);
1244 }
1245 return o;
1246 }
1247
1248 oop java_lang_Class::source_file(oop java_class) {
1249 assert(_source_file_offset != 0, "must be set");
1250 return java_class->obj_field(_source_file_offset);
1251 }
1252
1253 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1254 assert(_source_file_offset != 0, "must be set");
1255 java_class->obj_field_put(_source_file_offset, source_file);
1256 }
1257
1258 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1259 // This should be improved by adding a field at the Java level or by
1260 // introducing a new VM klass (see comment in ClassFileParser)
1261 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1262 if (type != T_VOID) {
1263 Klass* aklass = Universe::typeArrayKlassObj(type);
1264 assert(aklass != nullptr, "correct bootstrap");
1265 release_set_array_klass(java_class, aklass);
1266 }
1267 #ifdef ASSERT
1268 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1269 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1270 #endif
1271 return java_class;
1272 }
1273
1274 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1275 assert(is_instance(java_class), "must be a Class object");
1276 java_class->metadata_field_put(_klass_offset, klass);
1277 }
1278
1279
1280 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1281 assert(is_instance(java_class), "must be a Class object");
1282 Symbol* name = nullptr;
1283 bool is_instance = false;
1284 if (is_primitive(java_class)) {
1285 name = vmSymbols::type_signature(primitive_type(java_class));
1286 } else {
1287 Klass* k = as_Klass(java_class);
1288 is_instance = k->is_instance_klass();
1289 name = k->name();
1290 }
1291 if (name == nullptr) {
1292 st->print("<null>");
1293 return;
1294 }
1295 if (is_instance) st->print("L");
1296 st->write((char*) name->base(), (int) name->utf8_length());
1297 if (is_instance) st->print(";");
1298 }
1299
1300 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1301 assert(is_instance(java_class), "must be a Class object");
1302 Symbol* name;
1303 if (is_primitive(java_class)) {
1304 name = vmSymbols::type_signature(primitive_type(java_class));
1305 // Because this can create a new symbol, the caller has to decrement
1306 // the refcount, so make adjustment here and below for symbols returned
1307 // that are not created or incremented due to a successful lookup.
1308 name->increment_refcount();
1309 } else {
1310 Klass* k = as_Klass(java_class);
1311 if (!k->is_instance_klass()) {
1312 name = k->name();
1313 name->increment_refcount();
1314 } else {
1315 ResourceMark rm;
1316 const char* sigstr = k->signature_name();
1317 int siglen = (int) strlen(sigstr);
1318 if (!intern_if_not_found) {
1319 name = SymbolTable::probe(sigstr, siglen);
1320 } else {
1321 name = SymbolTable::new_symbol(sigstr, siglen);
1322 }
1323 }
1324 }
1325 return name;
1326 }
1327
1328 // Returns the Java name for this Java mirror (Resource allocated)
1329 // See Klass::external_name().
1330 // For primitive type Java mirrors, its type name is returned.
1331 const char* java_lang_Class::as_external_name(oop java_class) {
1332 assert(is_instance(java_class), "must be a Class object");
1333 const char* name = nullptr;
1334 if (is_primitive(java_class)) {
1335 name = type2name(primitive_type(java_class));
1336 } else {
1337 name = as_Klass(java_class)->external_name();
1338 }
1339 if (name == nullptr) {
1340 name = "<null>";
1341 }
1342 return name;
1343 }
1344
1345 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1346 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1347 assert(k == nullptr || k->is_klass() && k->is_array_klass(), "should be array klass");
1348 return k;
1349 }
1350
1351
1352 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1353 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1354 java_class->release_metadata_field_put(_array_klass_offset, klass);
1355 }
1356
1357
1358 BasicType java_lang_Class::primitive_type(oop java_class) {
1359 assert(is_primitive(java_class), "just checking");
1360 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1361 BasicType type = T_VOID;
1362 if (ak != nullptr) {
1363 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1364 type = ArrayKlass::cast(ak)->element_type();
1365 } else {
1366 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1367 }
1368 #ifdef ASSERT
1369 if (DumpSharedSpaces) {
1370 oop mirror = Universe::java_mirror(type);
1371 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1372 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1373 } else {
1374 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1375 }
1376 #endif
1377 return type;
1378 }
1379
1380 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1381 assert(is_instance(java_class), "must be a Class object");
1382 if (is_primitive(java_class)) {
1383 if (reference_klass != nullptr)
1384 (*reference_klass) = nullptr;
1385 return primitive_type(java_class);
1386 } else {
1387 if (reference_klass != nullptr)
1388 (*reference_klass) = as_Klass(java_class);
1389 return T_OBJECT;
1390 }
1391 }
1392
1393
1394 oop java_lang_Class::primitive_mirror(BasicType t) {
1395 oop mirror = Universe::java_mirror(t);
1396 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1397 assert(is_primitive(mirror), "must be primitive");
1398 return mirror;
1399 }
1400
1401 #define CLASS_FIELDS_DO(macro) \
1402 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1403 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1404 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1405 macro(_module_offset, k, "module", module_signature, false); \
1406 macro(_name_offset, k, "name", string_signature, false); \
1407 macro(_classData_offset, k, "classData", object_signature, false);
1408
1409 void java_lang_Class::compute_offsets() {
1410 if (_offsets_computed) {
1411 return;
1412 }
1413
1414 _offsets_computed = true;
1415
1416 InstanceKlass* k = vmClasses::Class_klass();
1417 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1418
1419 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1420 }
1421
1422 #if INCLUDE_CDS
1423 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1424 f->do_bool(&_offsets_computed);
1425
1426 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1427
1428 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1429 }
1430 #endif
1431
1432 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1433 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1434 return the_class_mirror->int_field(_classRedefinedCount_offset);
1435 }
1436
1437 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1438 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1439 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1440 }
1441
1442
1443 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1444 // platform thread structure, and a eetop offset which was used for thread
1445 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1446 // merged, so in the HotSpot VM we just use the eetop field for the thread
1447 // instead of the privateInfo_offset.
1448 //
1449 // Note: The stackSize field is only present starting in 1.4.
1450
1451 int java_lang_Thread_FieldHolder::_group_offset;
1452 int java_lang_Thread_FieldHolder::_priority_offset;
1453 int java_lang_Thread_FieldHolder::_stackSize_offset;
1454 int java_lang_Thread_FieldHolder::_daemon_offset;
1455 int java_lang_Thread_FieldHolder::_thread_status_offset;
1456
1457 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1458 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1459 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1460 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1461 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1462 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1463
1464 void java_lang_Thread_FieldHolder::compute_offsets() {
1465 assert(_group_offset == 0, "offsets should be initialized only once");
1466
1467 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1468 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1469 }
1470
1471 #if INCLUDE_CDS
1472 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1473 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1474 }
1475 #endif
1476
1477 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1478 return holder->obj_field(_group_offset);
1479 }
1480
1481 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1482 return (ThreadPriority)holder->int_field(_priority_offset);
1483 }
1484
1485 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1486 holder->int_field_put(_priority_offset, priority);
1487 }
1488
1489 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1490 return holder->long_field(_stackSize_offset);
1491 }
1492
1493 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1494 return holder->bool_field(_daemon_offset) != 0;
1495 }
1496
1497 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1498 assert(val, "daemon status is never turned off");
1499 holder->bool_field_put(_daemon_offset, val);
1500 }
1501
1502 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1503 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1504 }
1505
1506 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1507 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1508 }
1509
1510
1511 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1512
1513 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1514 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1515
1516 void java_lang_Thread_Constants::compute_offsets() {
1517 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1518
1519 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1520 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1521 }
1522
1523 #if INCLUDE_CDS
1524 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1525 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1526 }
1527 #endif
1528
1529 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1530 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1531 oop base = k->static_field_base_raw();
1532 return base->obj_field(_static_VTHREAD_GROUP_offset);
1533 }
1534
1535
1536 int java_lang_Thread::_holder_offset;
1537 int java_lang_Thread::_name_offset;
1538 int java_lang_Thread::_contextClassLoader_offset;
1539 int java_lang_Thread::_inheritedAccessControlContext_offset;
1540 int java_lang_Thread::_eetop_offset;
1541 int java_lang_Thread::_jvmti_thread_state_offset;
1542 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1543 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1544 int java_lang_Thread::_interrupted_offset;
1545 int java_lang_Thread::_tid_offset;
1546 int java_lang_Thread::_continuation_offset;
1547 int java_lang_Thread::_park_blocker_offset;
1548 int java_lang_Thread::_scopedValueBindings_offset;
1549 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1550
1551 #define THREAD_FIELDS_DO(macro) \
1552 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1553 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1554 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1555 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1556 macro(_eetop_offset, k, "eetop", long_signature, false); \
1557 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1558 macro(_tid_offset, k, "tid", long_signature, false); \
1559 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1560 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1561 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1562
1563 void java_lang_Thread::compute_offsets() {
1564 assert(_holder_offset == 0, "offsets should be initialized only once");
1565
1566 InstanceKlass* k = vmClasses::Thread_klass();
1567 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1568 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1569 }
1570
1571 #if INCLUDE_CDS
1572 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1573 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1574 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1575 }
1576 #endif
1577
1578 JavaThread* java_lang_Thread::thread(oop java_thread) {
1579 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1580 }
1581
1582 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1583 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1584 }
1585
1586 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1587 java_thread->address_field_put(_eetop_offset, (address)thread);
1588 }
1589
1590 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1591 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1592 }
1593
1594 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1595 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1596 }
1597
1598 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1599 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1600 }
1601
1602 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1603 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1604 }
1605
1606 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1607 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1608 int val = VTMS_transition_disable_count(java_thread);
1609 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1610 }
1611
1612 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1613 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1614 int val = VTMS_transition_disable_count(java_thread);
1615 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1616 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1617 }
1618
1619 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1620 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1621 }
1622
1623 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1624 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1625 }
1626
1627 int java_lang_Thread::is_in_VTMS_transition_offset() {
1628 return _jvmti_is_in_VTMS_transition_offset;
1629 }
1630
1631 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1632 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1633 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1634 }
1635
1636 oop java_lang_Thread::holder(oop java_thread) {
1637 // Note: may return null if the thread is still attaching
1638 return java_thread->obj_field(_holder_offset);
1639 }
1640
1641 bool java_lang_Thread::interrupted(oop java_thread) {
1642 // Make sure the caller can safely access oops.
1643 assert(Thread::current()->is_VM_thread() ||
1644 (JavaThread::current()->thread_state() != _thread_blocked &&
1645 JavaThread::current()->thread_state() != _thread_in_native),
1646 "Unsafe access to oop");
1647 return java_thread->bool_field_volatile(_interrupted_offset);
1648 }
1649
1650 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1651 // Make sure the caller can safely access oops.
1652 assert(Thread::current()->is_VM_thread() ||
1653 (JavaThread::current()->thread_state() != _thread_blocked &&
1654 JavaThread::current()->thread_state() != _thread_in_native),
1655 "Unsafe access to oop");
1656 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1657 }
1658
1659
1660 oop java_lang_Thread::name(oop java_thread) {
1661 return java_thread->obj_field(_name_offset);
1662 }
1663
1664
1665 void java_lang_Thread::set_name(oop java_thread, oop name) {
1666 java_thread->obj_field_put(_name_offset, name);
1667 }
1668
1669 // Convenience macros for setting and getting Thread fields that
1670 // are actually stored in the FieldHolder object of the thread.
1671 // The FieldHolder can be null whilst a thread is attaching via
1672 // JNI, and when the main thread is attaching.
1673
1674 // The default value should be the default/zero initialized value
1675 // of the field as it would be in java.lang.Thread.FieldHolder.
1676 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1677 { \
1678 oop holder = java_lang_Thread::holder(java_thread); \
1679 if (holder != nullptr) \
1680 return java_lang_Thread_FieldHolder::field(holder); \
1681 else \
1682 return default_val; \
1683 }
1684
1685 // We should never be trying to set a field of an attaching thread.
1686 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1687 { \
1688 oop holder = java_lang_Thread::holder(java_thread); \
1689 assert(holder != nullptr, "Thread not fully initialized"); \
1690 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1691 }
1692
1693
1694 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1695 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1696 }
1697
1698
1699 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1700 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1701 }
1702
1703
1704 oop java_lang_Thread::threadGroup(oop java_thread) {
1705 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1706 }
1707
1708
1709 bool java_lang_Thread::is_alive(oop java_thread) {
1710 JavaThread* thr = java_lang_Thread::thread(java_thread);
1711 return (thr != nullptr);
1712 }
1713
1714
1715 bool java_lang_Thread::is_daemon(oop java_thread) {
1716 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1717 }
1718
1719
1720 void java_lang_Thread::set_daemon(oop java_thread) {
1721 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1722 }
1723
1724 oop java_lang_Thread::context_class_loader(oop java_thread) {
1725 return java_thread->obj_field(_contextClassLoader_offset);
1726 }
1727
1728 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1729 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1730 }
1731
1732
1733 jlong java_lang_Thread::stackSize(oop java_thread) {
1734 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1735 }
1736
1737 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1738 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1739 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1740 }
1741
1742 // Read thread status value from threadStatus field in java.lang.Thread java class.
1743 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1744 // Make sure the caller is operating on behalf of the VM or is
1745 // running VM code (state == _thread_in_vm).
1746 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1747 JavaThread::current()->thread_state() == _thread_in_vm,
1748 "Java Thread is not running in vm");
1749 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1750 }
1751
1752 ByteSize java_lang_Thread::thread_id_offset() {
1753 return in_ByteSize(_tid_offset);
1754 }
1755
1756 oop java_lang_Thread::park_blocker(oop java_thread) {
1757 return java_thread->obj_field(_park_blocker_offset);
1758 }
1759
1760 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1761 ThreadsListHandle tlh(JavaThread::current());
1762 JavaThread* thread;
1763 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1764 if (is_virtual) {
1765 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1766 if (carrier_thread == nullptr) {
1767 return nullptr;
1768 }
1769 thread = java_lang_Thread::thread(carrier_thread);
1770 } else {
1771 thread = java_lang_Thread::thread(java_thread);
1772 }
1773 if (thread == nullptr) {
1774 return nullptr;
1775 }
1776
1777 class GetStackTraceClosure : public HandshakeClosure {
1778 public:
1779 const Handle _java_thread;
1780 int _depth;
1781 bool _retry_handshake;
1782 GrowableArray<Method*>* _methods;
1783 GrowableArray<int>* _bcis;
1784
1785 GetStackTraceClosure(Handle java_thread) :
1786 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1787 _methods(nullptr), _bcis(nullptr) {
1788 }
1789 ~GetStackTraceClosure() {
1790 delete _methods;
1791 delete _bcis;
1792 }
1793
1794 bool read_reset_retry() {
1795 bool ret = _retry_handshake;
1796 // If we re-execute the handshake this method need to return false
1797 // when the handshake cannot be performed. (E.g. thread terminating)
1798 _retry_handshake = false;
1799 return ret;
1800 }
1801
1802 void do_thread(Thread* th) {
1803 if (!Thread::current()->is_Java_thread()) {
1804 _retry_handshake = true;
1805 return;
1806 }
1807
1808 JavaThread* thread = JavaThread::cast(th);
1809
1810 if (!thread->has_last_Java_frame()) {
1811 return;
1812 }
1813
1814 bool carrier = false;
1815 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1816 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1817 const ContinuationEntry* ce = thread->vthread_continuation();
1818 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1819 return; // not mounted
1820 }
1821 } else {
1822 carrier = (thread->vthread_continuation() != nullptr);
1823 }
1824
1825 const int max_depth = MaxJavaStackTraceDepth;
1826 const bool skip_hidden = !ShowHiddenFrames;
1827
1828 // Pick minimum length that will cover most cases
1829 int init_length = 64;
1830 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1831 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1832
1833 int total_count = 0;
1834 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1835 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1836 vfst.next()) {
1837
1838 if (skip_hidden && (vfst.method()->is_hidden() ||
1839 vfst.method()->is_continuation_enter_intrinsic())) {
1840 continue;
1841 }
1842
1843 _methods->push(vfst.method());
1844 _bcis->push(vfst.bci());
1845 total_count++;
1846 }
1847
1848 _depth = total_count;
1849 }
1850 };
1851
1852 // Handshake with target
1853 ResourceMark rm(THREAD);
1854 HandleMark hm(THREAD);
1855 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1856 do {
1857 Handshake::execute(&gstc, &tlh, thread);
1858 } while (gstc.read_reset_retry());
1859
1860 // Stop if no stack trace is found.
1861 if (gstc._depth == 0) {
1862 return nullptr;
1863 }
1864
1865 // Convert to StackTraceElement array
1866 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1867 assert(k != nullptr, "must be loaded in 1.4+");
1868 if (k->should_be_initialized()) {
1869 k->initialize(CHECK_NULL);
1870 }
1871 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1872
1873 for (int i = 0; i < gstc._depth; i++) {
1874 methodHandle method(THREAD, gstc._methods->at(i));
1875 oop element = java_lang_StackTraceElement::create(method,
1876 gstc._bcis->at(i),
1877 CHECK_NULL);
1878 trace->obj_at_put(i, element);
1879 }
1880
1881 return trace();
1882 }
1883
1884 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1885 JavaThreadStatus status = get_thread_status(java_thread);
1886 switch (status) {
1887 case JavaThreadStatus::NEW : return "NEW";
1888 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1889 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1890 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1891 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1892 case JavaThreadStatus::PARKED : return "WAITING (parking)";
1893 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
1894 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1895 case JavaThreadStatus::TERMINATED : return "TERMINATED";
1896 default : return "UNKNOWN";
1897 };
1898 }
1899 int java_lang_ThreadGroup::_parent_offset;
1900 int java_lang_ThreadGroup::_name_offset;
1901 int java_lang_ThreadGroup::_maxPriority_offset;
1902 int java_lang_ThreadGroup::_daemon_offset;
1903
1904 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1905 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1906 return java_thread_group->obj_field(_parent_offset);
1907 }
1908
1909 // ("name as oop" accessor is not necessary)
1910
1911 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1912 oop name = java_thread_group->obj_field(_name_offset);
1913 // ThreadGroup.name can be null
1914 if (name != nullptr) {
1915 return java_lang_String::as_utf8_string(name);
1916 }
1917 return nullptr;
1918 }
1919
1920 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1921 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1922 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1923 }
1924
1925 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1926 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1927 return java_thread_group->bool_field(_daemon_offset) != 0;
1928 }
1929
1930 #define THREADGROUP_FIELDS_DO(macro) \
1931 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1932 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1933 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1934 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
1935
1936 void java_lang_ThreadGroup::compute_offsets() {
1937 assert(_parent_offset == 0, "offsets should be initialized only once");
1938
1939 InstanceKlass* k = vmClasses::ThreadGroup_klass();
1940 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1941 }
1942
1943 #if INCLUDE_CDS
1944 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1945 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1946 }
1947 #endif
1948
1949
1950 // java_lang_VirtualThread
1951
1952 int java_lang_VirtualThread::static_vthread_scope_offset;
1953 int java_lang_VirtualThread::_carrierThread_offset;
1954 int java_lang_VirtualThread::_continuation_offset;
1955 int java_lang_VirtualThread::_state_offset;
1956
1957 #define VTHREAD_FIELDS_DO(macro) \
1958 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
1959 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
1960 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1961 macro(_state_offset, k, "state", int_signature, false)
1962
1963
1964 void java_lang_VirtualThread::compute_offsets() {
1965 InstanceKlass* k = vmClasses::VirtualThread_klass();
1966 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1967 }
1968
1969 bool java_lang_VirtualThread::is_instance(oop obj) {
1970 return obj != nullptr && is_subclass(obj->klass());
1971 }
1972
1973 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
1974 oop thread = vthread->obj_field(_carrierThread_offset);
1975 return thread;
1976 }
1977
1978 oop java_lang_VirtualThread::continuation(oop vthread) {
1979 oop cont = vthread->obj_field(_continuation_offset);
1980 return cont;
1981 }
1982
1983 int java_lang_VirtualThread::state(oop vthread) {
1984 return vthread->int_field_acquire(_state_offset);
1985 }
1986
1987 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
1988 JavaThreadStatus status = JavaThreadStatus::NEW;
1989 switch (state) {
1990 case NEW :
1991 status = JavaThreadStatus::NEW;
1992 break;
1993 case STARTED :
1994 case RUNNABLE :
1995 case RUNNABLE_SUSPENDED :
1996 case RUNNING :
1997 case PARKING :
1998 case YIELDING :
1999 status = JavaThreadStatus::RUNNABLE;
2000 break;
2001 case PARKED :
2002 case PARKED_SUSPENDED :
2003 case PINNED :
2004 status = JavaThreadStatus::PARKED;
2005 break;
2006 case TERMINATED :
2007 status = JavaThreadStatus::TERMINATED;
2008 break;
2009 default:
2010 ShouldNotReachHere();
2011 }
2012 return status;
2013 }
2014
2015 #if INCLUDE_CDS
2016 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2017 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2018 }
2019 #endif
2020
2021 // java_lang_Throwable
2022
2023 int java_lang_Throwable::_backtrace_offset;
2024 int java_lang_Throwable::_detailMessage_offset;
2025 int java_lang_Throwable::_stackTrace_offset;
2026 int java_lang_Throwable::_depth_offset;
2027 int java_lang_Throwable::_cause_offset;
2028 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2029
2030 #define THROWABLE_FIELDS_DO(macro) \
2031 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2032 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2033 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2034 macro(_depth_offset, k, "depth", int_signature, false); \
2035 macro(_cause_offset, k, "cause", throwable_signature, false); \
2036 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2037
2038 void java_lang_Throwable::compute_offsets() {
2039 InstanceKlass* k = vmClasses::Throwable_klass();
2040 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2041 }
2042
2043 #if INCLUDE_CDS
2044 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2045 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2046 }
2047 #endif
2048
2049 oop java_lang_Throwable::unassigned_stacktrace() {
2050 InstanceKlass* ik = vmClasses::Throwable_klass();
2051 oop base = ik->static_field_base_raw();
2052 return base->obj_field(_static_unassigned_stacktrace_offset);
2053 }
2054
2055 oop java_lang_Throwable::backtrace(oop throwable) {
2056 return throwable->obj_field_acquire(_backtrace_offset);
2057 }
2058
2059
2060 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2061 throwable->release_obj_field_put(_backtrace_offset, value);
2062 }
2063
2064 int java_lang_Throwable::depth(oop throwable) {
2065 return throwable->int_field(_depth_offset);
2066 }
2067
2068 void java_lang_Throwable::set_depth(oop throwable, int value) {
2069 throwable->int_field_put(_depth_offset, value);
2070 }
2071
2072 oop java_lang_Throwable::message(oop throwable) {
2073 return throwable->obj_field(_detailMessage_offset);
2074 }
2075
2076 oop java_lang_Throwable::cause(oop throwable) {
2077 return throwable->obj_field(_cause_offset);
2078 }
2079
2080 // Return Symbol for detailed_message or null
2081 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2082 PreserveExceptionMark pm(Thread::current());
2083 oop detailed_message = java_lang_Throwable::message(throwable);
2084 if (detailed_message != nullptr) {
2085 return java_lang_String::as_symbol(detailed_message);
2086 }
2087 return nullptr;
2088 }
2089
2090 void java_lang_Throwable::set_message(oop throwable, oop value) {
2091 throwable->obj_field_put(_detailMessage_offset, value);
2092 }
2093
2094
2095 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2096 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2097 }
2098
2099 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2100 set_stacktrace(throwable, nullptr);
2101 }
2102
2103
2104 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2105 ResourceMark rm;
2106 Klass* k = throwable->klass();
2107 assert(k != nullptr, "just checking");
2108 st->print("%s", k->external_name());
2109 oop msg = message(throwable);
2110 if (msg != nullptr) {
2111 st->print(": %s", java_lang_String::as_utf8_string(msg));
2112 }
2113 }
2114
2115 // After this many redefines, the stack trace is unreliable.
2116 const int MAX_VERSION = USHRT_MAX;
2117
2118 static inline bool version_matches(Method* method, int version) {
2119 assert(version < MAX_VERSION, "version is too big");
2120 return method != nullptr && (method->constants()->version() == version);
2121 }
2122
2123 // This class provides a simple wrapper over the internal structure of
2124 // exception backtrace to insulate users of the backtrace from needing
2125 // to know what it looks like.
2126 // The code of this class is not GC safe. Allocations can only happen
2127 // in expand().
2128 class BacktraceBuilder: public StackObj {
2129 friend class BacktraceIterator;
2130 private:
2131 Handle _backtrace;
2132 objArrayOop _head;
2133 typeArrayOop _methods;
2134 typeArrayOop _bcis;
2135 objArrayOop _mirrors;
2136 typeArrayOop _names; // Needed to insulate method name against redefinition.
2137 // True if the top frame of the backtrace is omitted because it shall be hidden.
2138 bool _has_hidden_top_frame;
2139 int _index;
2140 NoSafepointVerifier _nsv;
2141
2142 enum {
2143 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2144 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2145 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2146 trace_names_offset = java_lang_Throwable::trace_names_offset,
2147 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2148 trace_next_offset = java_lang_Throwable::trace_next_offset,
2149 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2150 trace_size = java_lang_Throwable::trace_size,
2151 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2152 };
2153
2154 // get info out of chunks
2155 static typeArrayOop get_methods(objArrayHandle chunk) {
2156 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2157 assert(methods != nullptr, "method array should be initialized in backtrace");
2158 return methods;
2159 }
2160 static typeArrayOop get_bcis(objArrayHandle chunk) {
2161 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2162 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2163 return bcis;
2164 }
2165 static objArrayOop get_mirrors(objArrayHandle chunk) {
2166 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2167 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2168 return mirrors;
2169 }
2170 static typeArrayOop get_names(objArrayHandle chunk) {
2171 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2172 assert(names != nullptr, "names array should be initialized in backtrace");
2173 return names;
2174 }
2175 static bool has_hidden_top_frame(objArrayHandle chunk) {
2176 oop hidden = chunk->obj_at(trace_hidden_offset);
2177 return hidden != nullptr;
2178 }
2179
2180 public:
2181
2182 // constructor for new backtrace
2183 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2184 expand(CHECK);
2185 _backtrace = Handle(THREAD, _head);
2186 _index = 0;
2187 }
2188
2189 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2190 _methods = get_methods(backtrace);
2191 _bcis = get_bcis(backtrace);
2192 _mirrors = get_mirrors(backtrace);
2193 _names = get_names(backtrace);
2194 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2195 assert(_methods->length() == _bcis->length() &&
2196 _methods->length() == _mirrors->length() &&
2197 _mirrors->length() == _names->length(),
2198 "method and source information arrays should match");
2199
2200 // head is the preallocated backtrace
2201 _head = backtrace();
2202 _backtrace = Handle(thread, _head);
2203 _index = 0;
2204 }
2205
2206 void expand(TRAPS) {
2207 objArrayHandle old_head(THREAD, _head);
2208 PauseNoSafepointVerifier pnsv(&_nsv);
2209
2210 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2211 objArrayHandle new_head(THREAD, head);
2212
2213 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2214 typeArrayHandle new_methods(THREAD, methods);
2215
2216 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2217 typeArrayHandle new_bcis(THREAD, bcis);
2218
2219 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2220 objArrayHandle new_mirrors(THREAD, mirrors);
2221
2222 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2223 typeArrayHandle new_names(THREAD, names);
2224
2225 if (!old_head.is_null()) {
2226 old_head->obj_at_put(trace_next_offset, new_head());
2227 }
2228 new_head->obj_at_put(trace_methods_offset, new_methods());
2229 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2230 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2231 new_head->obj_at_put(trace_names_offset, new_names());
2232 new_head->obj_at_put(trace_hidden_offset, nullptr);
2233
2234 _head = new_head();
2235 _methods = new_methods();
2236 _bcis = new_bcis();
2237 _mirrors = new_mirrors();
2238 _names = new_names();
2239 _index = 0;
2240 }
2241
2242 oop backtrace() {
2243 return _backtrace();
2244 }
2245
2246 inline void push(Method* method, int bci, TRAPS) {
2247 // Smear the -1 bci to 0 since the array only holds unsigned
2248 // shorts. The later line number lookup would just smear the -1
2249 // to a 0 even if it could be recorded.
2250 if (bci == SynchronizationEntryBCI) bci = 0;
2251
2252 if (_index >= trace_chunk_size) {
2253 methodHandle mhandle(THREAD, method);
2254 expand(CHECK);
2255 method = mhandle();
2256 }
2257
2258 _methods->ushort_at_put(_index, method->orig_method_idnum());
2259 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2260
2261 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2262 // klass owning the symbols alive so their refcounts aren't decremented.
2263 Symbol* name = method->name();
2264 _names->symbol_at_put(_index, name);
2265
2266 // We need to save the mirrors in the backtrace to keep the class
2267 // from being unloaded while we still have this stack trace.
2268 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2269 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2270
2271 _index++;
2272 }
2273
2274 void set_has_hidden_top_frame() {
2275 if (!_has_hidden_top_frame) {
2276 // It would be nice to add java/lang/Boolean::TRUE here
2277 // to indicate that this backtrace has a hidden top frame.
2278 // But this code is used before TRUE is allocated.
2279 // Therefore let's just use an arbitrary legal oop
2280 // available right here. _methods is a short[].
2281 assert(_methods != nullptr, "we need a legal oop");
2282 _has_hidden_top_frame = true;
2283 _head->obj_at_put(trace_hidden_offset, _methods);
2284 }
2285 }
2286 };
2287
2288 struct BacktraceElement : public StackObj {
2289 int _method_id;
2290 int _bci;
2291 int _version;
2292 Symbol* _name;
2293 Handle _mirror;
2294 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2295 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2296 };
2297
2298 class BacktraceIterator : public StackObj {
2299 int _index;
2300 objArrayHandle _result;
2301 objArrayHandle _mirrors;
2302 typeArrayHandle _methods;
2303 typeArrayHandle _bcis;
2304 typeArrayHandle _names;
2305
2306 void init(objArrayHandle result, Thread* thread) {
2307 // Get method id, bci, version and mirror from chunk
2308 _result = result;
2309 if (_result.not_null()) {
2310 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2311 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2312 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2313 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2314 _index = 0;
2315 }
2316 }
2317 public:
2318 BacktraceIterator(objArrayHandle result, Thread* thread) {
2319 init(result, thread);
2320 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2321 }
2322
2323 BacktraceElement next(Thread* thread) {
2324 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2325 _methods->ushort_at(_index),
2326 Backtrace::version_at(_bcis->int_at(_index)),
2327 Backtrace::bci_at(_bcis->int_at(_index)),
2328 _names->symbol_at(_index));
2329 _index++;
2330
2331 if (_index >= java_lang_Throwable::trace_chunk_size) {
2332 int next_offset = java_lang_Throwable::trace_next_offset;
2333 // Get next chunk
2334 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2335 init(result, thread);
2336 }
2337 return e;
2338 }
2339
2340 bool repeat() {
2341 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2342 }
2343 };
2344
2345
2346 // Print stack trace element to resource allocated buffer
2347 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2348 int version, int bci, Symbol* name) {
2349 ResourceMark rm;
2350
2351 // Get strings and string lengths
2352 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2353 const char* klass_name = holder->external_name();
2354 int buf_len = (int)strlen(klass_name);
2355
2356 char* method_name = name->as_C_string();
2357 buf_len += (int)strlen(method_name);
2358
2359 char* source_file_name = nullptr;
2360 Symbol* source = Backtrace::get_source_file_name(holder, version);
2361 if (source != nullptr) {
2362 source_file_name = source->as_C_string();
2363 buf_len += (int)strlen(source_file_name);
2364 }
2365
2366 char *module_name = nullptr, *module_version = nullptr;
2367 ModuleEntry* module = holder->module();
2368 if (module->is_named()) {
2369 module_name = module->name()->as_C_string();
2370 buf_len += (int)strlen(module_name);
2371 if (module->version() != nullptr) {
2372 module_version = module->version()->as_C_string();
2373 buf_len += (int)strlen(module_version);
2374 }
2375 }
2376
2377 // Allocate temporary buffer with extra space for formatting and line number
2378 const size_t buf_size = buf_len + 64;
2379 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2380
2381 // Print stack trace line in buffer
2382 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2383
2384 // Print module information
2385 if (module_name != nullptr) {
2386 if (module_version != nullptr) {
2387 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2388 } else {
2389 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2390 }
2391 }
2392
2393 // The method can be null if the requested class version is gone
2394 Method* method = holder->method_with_orig_idnum(method_id, version);
2395 if (!version_matches(method, version)) {
2396 strcat(buf, "Redefined)");
2397 } else {
2398 int line_number = Backtrace::get_line_number(method, bci);
2399 if (line_number == -2) {
2400 strcat(buf, "Native Method)");
2401 } else {
2402 if (source_file_name != nullptr && (line_number != -1)) {
2403 // Sourcename and linenumber
2404 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2405 } else if (source_file_name != nullptr) {
2406 // Just sourcename
2407 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2408 } else {
2409 // Neither sourcename nor linenumber
2410 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2411 }
2412 CompiledMethod* nm = method->code();
2413 if (WizardMode && nm != nullptr) {
2414 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2415 }
2416 }
2417 }
2418
2419 st->print_cr("%s", buf);
2420 }
2421
2422 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2423 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2424 int method_id = method->orig_method_idnum();
2425 int version = method->constants()->version();
2426 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2427 }
2428
2429 /**
2430 * Print the throwable message and its stack trace plus all causes by walking the
2431 * cause chain. The output looks the same as of Throwable.printStackTrace().
2432 */
2433 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2434 // First, print the message.
2435 print(throwable(), st);
2436 st->cr();
2437
2438 // Now print the stack trace.
2439 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2440 while (throwable.not_null()) {
2441 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2442 if (result.is_null()) {
2443 st->print_raw_cr("\t<<no stack trace available>>");
2444 return;
2445 }
2446 BacktraceIterator iter(result, THREAD);
2447
2448 while (iter.repeat()) {
2449 BacktraceElement bte = iter.next(THREAD);
2450 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2451 }
2452 {
2453 // Call getCause() which doesn't necessarily return the _cause field.
2454 ExceptionMark em(THREAD);
2455 JavaValue cause(T_OBJECT);
2456 JavaCalls::call_virtual(&cause,
2457 throwable,
2458 throwable->klass(),
2459 vmSymbols::getCause_name(),
2460 vmSymbols::void_throwable_signature(),
2461 THREAD);
2462 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2463 if (HAS_PENDING_EXCEPTION) {
2464 CLEAR_PENDING_EXCEPTION;
2465 throwable = Handle();
2466 } else {
2467 throwable = Handle(THREAD, cause.get_oop());
2468 if (throwable.not_null()) {
2469 st->print("Caused by: ");
2470 print(throwable(), st);
2471 st->cr();
2472 }
2473 }
2474 }
2475 }
2476 }
2477
2478 /**
2479 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2480 */
2481 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2482 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2483 JavaValue result(T_VOID);
2484 JavaCalls::call_virtual(&result,
2485 throwable,
2486 vmClasses::Throwable_klass(),
2487 vmSymbols::printStackTrace_name(),
2488 vmSymbols::void_method_signature(),
2489 THREAD);
2490 }
2491
2492 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2493 if (!StackTraceInThrowable) return;
2494 ResourceMark rm(THREAD);
2495
2496 // Start out by clearing the backtrace for this object, in case the VM
2497 // runs out of memory while allocating the stack trace
2498 set_backtrace(throwable(), nullptr);
2499 // Clear lazily constructed Java level stacktrace if refilling occurs
2500 // This is unnecessary in 1.7+ but harmless
2501 clear_stacktrace(throwable());
2502
2503 int max_depth = MaxJavaStackTraceDepth;
2504 JavaThread* thread = THREAD;
2505
2506 BacktraceBuilder bt(CHECK);
2507
2508 // If there is no Java frame just return the method that was being called
2509 // with bci 0
2510 if (!thread->has_last_Java_frame()) {
2511 if (max_depth >= 1 && method() != nullptr) {
2512 bt.push(method(), 0, CHECK);
2513 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2514 set_depth(throwable(), 1);
2515 set_backtrace(throwable(), bt.backtrace());
2516 }
2517 return;
2518 }
2519
2520 // Instead of using vframe directly, this version of fill_in_stack_trace
2521 // basically handles everything by hand. This significantly improved the
2522 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2523 // See bug 6333838 for more details.
2524 // The "ASSERT" here is to verify this method generates the exactly same stack
2525 // trace as utilizing vframe.
2526 #ifdef ASSERT
2527 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2528 #endif
2529 int total_count = 0;
2530 RegisterMap map(thread,
2531 RegisterMap::UpdateMap::skip,
2532 RegisterMap::ProcessFrames::skip,
2533 RegisterMap::WalkContinuation::include);
2534 int decode_offset = 0;
2535 CompiledMethod* nm = nullptr;
2536 bool skip_fillInStackTrace_check = false;
2537 bool skip_throwableInit_check = false;
2538 bool skip_hidden = !ShowHiddenFrames;
2539 bool show_carrier = ShowCarrierFrames;
2540 ContinuationEntry* cont_entry = thread->last_continuation();
2541 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2542 Method* method = nullptr;
2543 int bci = 0;
2544
2545 // Compiled java method case.
2546 if (decode_offset != 0) {
2547 DebugInfoReadStream stream(nm, decode_offset);
2548 decode_offset = stream.read_int();
2549 method = (Method*)nm->metadata_at(stream.read_int());
2550 bci = stream.read_bci();
2551 } else {
2552 if (fr.is_first_frame()) break;
2553
2554 if (Continuation::is_continuation_enterSpecial(fr)) {
2555 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2556 if (!show_carrier && cont_entry->is_virtual_thread()) {
2557 break;
2558 }
2559 cont_entry = cont_entry->parent();
2560 }
2561
2562 address pc = fr.pc();
2563 if (fr.is_interpreted_frame()) {
2564 address bcp;
2565 if (!map.in_cont()) {
2566 bcp = fr.interpreter_frame_bcp();
2567 method = fr.interpreter_frame_method();
2568 } else {
2569 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2570 method = map.stack_chunk()->interpreter_frame_method(fr);
2571 }
2572 bci = method->bci_from(bcp);
2573 fr = fr.sender(&map);
2574 } else {
2575 CodeBlob* cb = fr.cb();
2576 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2577 // but non nmethod
2578 fr = fr.sender(&map);
2579 if (cb == nullptr || !cb->is_compiled()) {
2580 continue;
2581 }
2582 nm = cb->as_compiled_method();
2583 assert(nm->method() != nullptr, "must be");
2584 if (nm->method()->is_native()) {
2585 method = nm->method();
2586 bci = 0;
2587 } else {
2588 PcDesc* pd = nm->pc_desc_at(pc);
2589 decode_offset = pd->scope_decode_offset();
2590 // if decode_offset is not equal to 0, it will execute the
2591 // "compiled java method case" at the beginning of the loop.
2592 continue;
2593 }
2594 }
2595 }
2596 #ifdef ASSERT
2597 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2598 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2599 st.next();
2600 }
2601 #endif
2602
2603 // the format of the stacktrace will be:
2604 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2605 // - 0 or more <init> methods for the exception class (skipped)
2606 // - rest of the stack
2607
2608 if (!skip_fillInStackTrace_check) {
2609 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2610 throwable->is_a(method->method_holder())) {
2611 continue;
2612 }
2613 else {
2614 skip_fillInStackTrace_check = true; // gone past them all
2615 }
2616 }
2617 if (!skip_throwableInit_check) {
2618 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2619
2620 // skip <init> methods of the exception class and superclasses
2621 // This is similar to classic VM.
2622 if (method->name() == vmSymbols::object_initializer_name() &&
2623 throwable->is_a(method->method_holder())) {
2624 continue;
2625 } else {
2626 // there are none or we've seen them all - either way stop checking
2627 skip_throwableInit_check = true;
2628 }
2629 }
2630 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2631 if (skip_hidden) {
2632 if (total_count == 0) {
2633 // The top frame will be hidden from the stack trace.
2634 bt.set_has_hidden_top_frame();
2635 }
2636 continue;
2637 }
2638 }
2639
2640 bt.push(method, bci, CHECK);
2641 total_count++;
2642 }
2643
2644 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2645
2646 // Put completed stack trace into throwable object
2647 set_backtrace(throwable(), bt.backtrace());
2648 set_depth(throwable(), total_count);
2649 }
2650
2651 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2652 // No-op if stack trace is disabled
2653 if (!StackTraceInThrowable) {
2654 return;
2655 }
2656
2657 // Disable stack traces for some preallocated out of memory errors
2658 if (!Universe::should_fill_in_stack_trace(throwable)) {
2659 return;
2660 }
2661
2662 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2663 PreserveExceptionMark pm(THREAD);
2664
2665 fill_in_stack_trace(throwable, method, THREAD);
2666 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2667 // original exception via the PreserveExceptionMark destructor.
2668 CLEAR_PENDING_EXCEPTION;
2669 }
2670
2671 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2672 // Allocate stack trace - backtrace is created but not filled in
2673
2674 // No-op if stack trace is disabled
2675 if (!StackTraceInThrowable) return;
2676 BacktraceBuilder bt(CHECK); // creates a backtrace
2677 set_backtrace(throwable(), bt.backtrace());
2678 }
2679
2680
2681 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2682 // Fill in stack trace into preallocated backtrace (no GC)
2683
2684 // No-op if stack trace is disabled
2685 if (!StackTraceInThrowable) return;
2686
2687 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2688
2689 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2690
2691 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2692 assert(backtrace.not_null(), "backtrace should have been preallocated");
2693
2694 ResourceMark rm(THREAD);
2695 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2696
2697 BacktraceBuilder bt(THREAD, backtrace);
2698
2699 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2700 // methods as preallocated errors aren't created by "java" code.
2701
2702 // fill in as much stack trace as possible
2703 int chunk_count = 0;
2704 for (;!st.at_end(); st.next()) {
2705 bt.push(st.method(), st.bci(), CHECK);
2706 chunk_count++;
2707
2708 // Bail-out for deep stacks
2709 if (chunk_count >= trace_chunk_size) break;
2710 }
2711 set_depth(throwable(), chunk_count);
2712 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2713
2714 // We support the Throwable immutability protocol defined for Java 7.
2715 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2716 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2717 }
2718
2719 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2720 objArrayHandle stack_trace_array_h, TRAPS) {
2721
2722 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2723 THROW(vmSymbols::java_lang_NullPointerException());
2724 }
2725
2726 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2727
2728 if (stack_trace_array_h->length() != depth) {
2729 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2730 }
2731
2732 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2733 BacktraceIterator iter(result, THREAD);
2734
2735 int index = 0;
2736 while (iter.repeat()) {
2737 BacktraceElement bte = iter.next(THREAD);
2738
2739 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2740
2741 if (stack_trace_element.is_null()) {
2742 THROW(vmSymbols::java_lang_NullPointerException());
2743 }
2744
2745 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2746 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2747
2748 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2749 method,
2750 bte._version,
2751 bte._bci,
2752 bte._name,
2753 CHECK);
2754 }
2755 }
2756
2757 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2758 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2759 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2760 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2761 // symbolic stacktrace of 'throwable'.
2762 assert(throwable.not_null(), "shouldn't be");
2763
2764 // Now create the message from the original exception and thread name.
2765 ResourceMark rm(current);
2766 const char *message = nullptr;
2767 oop detailed_message = java_lang_Throwable::message(throwable());
2768 if (detailed_message != nullptr) {
2769 message = java_lang_String::as_utf8_string(detailed_message);
2770 }
2771 stringStream st;
2772 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2773 message == nullptr ? "" : ":");
2774 if (message == nullptr) {
2775 st.print("[in thread \"%s\"]", current->name());
2776 } else {
2777 st.print("%s [in thread \"%s\"]", message, current->name());
2778 }
2779
2780 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2781 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2782 // If new_exception returns a different exception while creating the exception,
2783 // abandon the attempt to save the initialization error and return null.
2784 if (init_error->klass()->name() != exception_name) {
2785 log_info(class, init)("Exception %s thrown while saving initialization exception",
2786 init_error->klass()->external_name());
2787 return Handle();
2788 }
2789
2790 // Call to java to fill in the stack trace and clear declaringClassObject to
2791 // not keep classes alive in the stack trace.
2792 // call this: public StackTraceElement[] getStackTrace()
2793 JavaValue result(T_ARRAY);
2794 JavaCalls::call_virtual(&result, throwable,
2795 vmClasses::Throwable_klass(),
2796 vmSymbols::getStackTrace_name(),
2797 vmSymbols::getStackTrace_signature(),
2798 current);
2799 if (!current->has_pending_exception()){
2800 Handle stack_trace(current, result.get_oop());
2801 assert(stack_trace->is_objArray(), "Should be an array");
2802 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2803 // Clear backtrace because the stacktrace should be used instead.
2804 set_backtrace(init_error(), nullptr);
2805 } else {
2806 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2807 init_error->klass()->external_name());
2808 current->clear_pending_exception();
2809 }
2810
2811 return init_error;
2812 }
2813
2814 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2815 JavaThread* current = JavaThread::current();
2816 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2817 BacktraceIterator iter(result, current);
2818 // No backtrace available.
2819 if (!iter.repeat()) return false;
2820
2821 // If the exception happened in a frame that has been hidden, i.e.,
2822 // omitted from the back trace, we can not compute the message.
2823 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2824 if (hidden != nullptr) {
2825 return false;
2826 }
2827
2828 // Get first backtrace element.
2829 BacktraceElement bte = iter.next(current);
2830
2831 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2832 assert(holder != nullptr, "first element should be non-null");
2833 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2834
2835 // Original version is no longer available.
2836 if (m == nullptr || !version_matches(m, bte._version)) {
2837 return false;
2838 }
2839
2840 *method = m;
2841 *bci = bte._bci;
2842 return true;
2843 }
2844
2845 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2846 // Allocate java.lang.StackTraceElement instance
2847 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2848 assert(k != nullptr, "must be loaded in 1.4+");
2849 if (k->should_be_initialized()) {
2850 k->initialize(CHECK_NULL);
2851 }
2852
2853 Handle element = k->allocate_instance_handle(CHECK_NULL);
2854
2855 int version = method->constants()->version();
2856 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2857 return element();
2858 }
2859
2860 void java_lang_StackTraceElement::fill_in(Handle element,
2861 InstanceKlass* holder, const methodHandle& method,
2862 int version, int bci, Symbol* name, TRAPS) {
2863 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2864
2865 ResourceMark rm(THREAD);
2866 HandleMark hm(THREAD);
2867
2868 // Fill in class name
2869 Handle java_class(THREAD, holder->java_mirror());
2870 oop classname = java_lang_Class::name(java_class, CHECK);
2871 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2872 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2873
2874 oop loader = holder->class_loader();
2875 if (loader != nullptr) {
2876 oop loader_name = java_lang_ClassLoader::name(loader);
2877 if (loader_name != nullptr)
2878 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2879 }
2880
2881 // Fill in method name
2882 oop methodname = StringTable::intern(name, CHECK);
2883 java_lang_StackTraceElement::set_methodName(element(), methodname);
2884
2885 // Fill in module name and version
2886 ModuleEntry* module = holder->module();
2887 if (module->is_named()) {
2888 oop module_name = StringTable::intern(module->name(), CHECK);
2889 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2890 oop module_version;
2891 if (module->version() != nullptr) {
2892 module_version = StringTable::intern(module->version(), CHECK);
2893 } else {
2894 module_version = nullptr;
2895 }
2896 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2897 }
2898
2899 if (method() == nullptr || !version_matches(method(), version)) {
2900 // The method was redefined, accurate line number information isn't available
2901 java_lang_StackTraceElement::set_fileName(element(), nullptr);
2902 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2903 } else {
2904 Symbol* source;
2905 oop source_file;
2906 int line_number;
2907 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2908
2909 java_lang_StackTraceElement::set_fileName(element(), source_file);
2910 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2911 }
2912 }
2913
2914 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2915 InstanceKlass* holder,
2916 int version,
2917 const methodHandle& method,
2918 int bci,
2919 Symbol*& source,
2920 oop& source_file,
2921 int& line_number, TRAPS) {
2922 // Fill in source file name and line number.
2923 source = Backtrace::get_source_file_name(holder, version);
2924 source_file = java_lang_Class::source_file(java_class());
2925 if (source != nullptr) {
2926 // Class was not redefined. We can trust its cache if set,
2927 // else we have to initialize it.
2928 if (source_file == nullptr) {
2929 source_file = StringTable::intern(source, CHECK);
2930 java_lang_Class::set_source_file(java_class(), source_file);
2931 }
2932 } else {
2933 // Class was redefined. Dump the cache if it was set.
2934 if (source_file != nullptr) {
2935 source_file = nullptr;
2936 java_lang_Class::set_source_file(java_class(), source_file);
2937 }
2938 }
2939 line_number = Backtrace::get_line_number(method(), bci);
2940 }
2941
2942 #if INCLUDE_JVMCI
2943 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
2944 Symbol*& filename, int& line_number, TRAPS) {
2945 ResourceMark rm(THREAD);
2946 HandleMark hm(THREAD);
2947
2948 filename = nullptr;
2949 line_number = -1;
2950
2951 oop source_file;
2952 int version = method->constants()->version();
2953 InstanceKlass* holder = method->method_holder();
2954 Handle java_class(THREAD, holder->java_mirror());
2955 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
2956 }
2957 #endif // INCLUDE_JVMCI
2958
2959 // java_lang_ClassFrameInfo
2960
2961 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
2962 int java_lang_ClassFrameInfo::_flags_offset;
2963
2964 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
2965 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
2966 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
2967
2968 void java_lang_ClassFrameInfo::compute_offsets() {
2969 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
2970 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2971 }
2972
2973 #if INCLUDE_CDS
2974 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
2975 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2976 }
2977 #endif
2978
2979 static int get_flags(const methodHandle& m) {
2980 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
2981 if (m->is_initializer()) {
2982 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
2983 } else {
2984 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
2985 }
2986 if (m->caller_sensitive()) {
2987 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
2988 }
2989 if (m->is_hidden()) {
2990 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
2991 }
2992 assert((flags & 0xFF000000) == 0, "unexpected flags");
2993 return flags;
2994 }
2995
2996 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
2997 return obj->obj_field(_classOrMemberName_offset);
2998 }
2999
3000 int java_lang_ClassFrameInfo::flags(oop obj) {
3001 return obj->int_field(_flags_offset);
3002 }
3003
3004 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3005 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3006 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3007 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3008 stackFrame->int_field_put(_flags_offset, flags);
3009 }
3010
3011 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3012 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3013 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3014 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3015 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3016 stackFrame->int_field_put(_flags_offset, flags);
3017 }
3018
3019
3020 // java_lang_StackFrameInfo
3021
3022 int java_lang_StackFrameInfo::_type_offset;
3023 int java_lang_StackFrameInfo::_name_offset;
3024 int java_lang_StackFrameInfo::_bci_offset;
3025 int java_lang_StackFrameInfo::_version_offset;
3026 int java_lang_StackFrameInfo::_contScope_offset;
3027
3028 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3029 macro(_type_offset, k, "type", object_signature, false); \
3030 macro(_name_offset, k, "name", string_signature, false); \
3031 macro(_bci_offset, k, "bci", int_signature, false); \
3032 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3033
3034 void java_lang_StackFrameInfo::compute_offsets() {
3035 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3036 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3037 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3038 }
3039
3040 #if INCLUDE_CDS
3041 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3042 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3043 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3044 }
3045 #endif
3046
3047 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3048 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3049 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3050 return method;
3051 }
3052
3053 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3054 // set Method* or mid/cpref
3055 HandleMark hm(THREAD);
3056 Handle cont_h(THREAD, cont);
3057 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3058
3059 // set bci
3060 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3061 // method may be redefined; store the version
3062 int version = method->constants()->version();
3063 assert((jushort)version == version, "version should be short");
3064 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3065
3066 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3067 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3068 }
3069
3070 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3071 ResourceMark rm(THREAD);
3072 HandleMark hm(THREAD);
3073
3074 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3075 InstanceKlass* holder = method->method_holder();
3076 short version = stackFrame->short_field(_version_offset);
3077 int bci = stackFrame->int_field(_bci_offset);
3078 Symbol* name = method->name();
3079 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3080 }
3081
3082 oop java_lang_StackFrameInfo::type(oop obj) {
3083 return obj->obj_field(_type_offset);
3084 }
3085
3086 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3087 obj->obj_field_put(_type_offset, value);
3088 }
3089
3090 oop java_lang_StackFrameInfo::name(oop obj) {
3091 return obj->obj_field(_name_offset);
3092 }
3093
3094 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3095 obj->obj_field_put(_name_offset, value);
3096 }
3097
3098 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3099 obj->short_field_put(_version_offset, value);
3100 }
3101
3102 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3103 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3104 obj->int_field_put(_bci_offset, value);
3105 }
3106
3107 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3108 obj->obj_field_put(_contScope_offset, value);
3109 }
3110
3111 int java_lang_LiveStackFrameInfo::_monitors_offset;
3112 int java_lang_LiveStackFrameInfo::_locals_offset;
3113 int java_lang_LiveStackFrameInfo::_operands_offset;
3114 int java_lang_LiveStackFrameInfo::_mode_offset;
3115
3116 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3117 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3118 macro(_locals_offset, k, "locals", object_array_signature, false); \
3119 macro(_operands_offset, k, "operands", object_array_signature, false); \
3120 macro(_mode_offset, k, "mode", int_signature, false)
3121
3122 void java_lang_LiveStackFrameInfo::compute_offsets() {
3123 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3124 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3125 }
3126
3127 #if INCLUDE_CDS
3128 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3129 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3130 }
3131 #endif
3132
3133 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3134 obj->obj_field_put(_monitors_offset, value);
3135 }
3136
3137 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3138 obj->obj_field_put(_locals_offset, value);
3139 }
3140
3141 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3142 obj->obj_field_put(_operands_offset, value);
3143 }
3144
3145 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3146 obj->int_field_put(_mode_offset, value);
3147 }
3148
3149
3150 // java_lang_AccessibleObject
3151
3152 int java_lang_reflect_AccessibleObject::_override_offset;
3153
3154 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3155 macro(_override_offset, k, "override", bool_signature, false)
3156
3157 void java_lang_reflect_AccessibleObject::compute_offsets() {
3158 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3159 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3160 }
3161
3162 #if INCLUDE_CDS
3163 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3164 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3165 }
3166 #endif
3167
3168 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3169 return (jboolean) reflect->bool_field(_override_offset);
3170 }
3171
3172 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3173 reflect->bool_field_put(_override_offset, (int) value);
3174 }
3175
3176 // java_lang_reflect_Method
3177
3178 int java_lang_reflect_Method::_clazz_offset;
3179 int java_lang_reflect_Method::_name_offset;
3180 int java_lang_reflect_Method::_returnType_offset;
3181 int java_lang_reflect_Method::_parameterTypes_offset;
3182 int java_lang_reflect_Method::_exceptionTypes_offset;
3183 int java_lang_reflect_Method::_slot_offset;
3184 int java_lang_reflect_Method::_modifiers_offset;
3185 int java_lang_reflect_Method::_signature_offset;
3186 int java_lang_reflect_Method::_annotations_offset;
3187 int java_lang_reflect_Method::_parameter_annotations_offset;
3188 int java_lang_reflect_Method::_annotation_default_offset;
3189
3190 #define METHOD_FIELDS_DO(macro) \
3191 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3192 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3193 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3194 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3195 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3196 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3197 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3198 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3199 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3200 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3201 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3202
3203 void java_lang_reflect_Method::compute_offsets() {
3204 InstanceKlass* k = vmClasses::reflect_Method_klass();
3205 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3206 }
3207
3208 #if INCLUDE_CDS
3209 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3210 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3211 }
3212 #endif
3213
3214 Handle java_lang_reflect_Method::create(TRAPS) {
3215 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3216 Klass* klass = vmClasses::reflect_Method_klass();
3217 // This class is eagerly initialized during VM initialization, since we keep a reference
3218 // to one of the methods
3219 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3220 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3221 }
3222
3223 oop java_lang_reflect_Method::clazz(oop reflect) {
3224 return reflect->obj_field(_clazz_offset);
3225 }
3226
3227 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3228 reflect->obj_field_put(_clazz_offset, value);
3229 }
3230
3231 int java_lang_reflect_Method::slot(oop reflect) {
3232 return reflect->int_field(_slot_offset);
3233 }
3234
3235 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3236 reflect->int_field_put(_slot_offset, value);
3237 }
3238
3239 void java_lang_reflect_Method::set_name(oop method, oop value) {
3240 method->obj_field_put(_name_offset, value);
3241 }
3242
3243 oop java_lang_reflect_Method::return_type(oop method) {
3244 return method->obj_field(_returnType_offset);
3245 }
3246
3247 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3248 method->obj_field_put(_returnType_offset, value);
3249 }
3250
3251 oop java_lang_reflect_Method::parameter_types(oop method) {
3252 return method->obj_field(_parameterTypes_offset);
3253 }
3254
3255 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3256 method->obj_field_put(_parameterTypes_offset, value);
3257 }
3258
3259 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3260 method->obj_field_put(_exceptionTypes_offset, value);
3261 }
3262
3263 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3264 method->int_field_put(_modifiers_offset, value);
3265 }
3266
3267 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3268 method->obj_field_put(_signature_offset, value);
3269 }
3270
3271 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3272 method->obj_field_put(_annotations_offset, value);
3273 }
3274
3275 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3276 method->obj_field_put(_parameter_annotations_offset, value);
3277 }
3278
3279 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3280 method->obj_field_put(_annotation_default_offset, value);
3281 }
3282
3283 int java_lang_reflect_Constructor::_clazz_offset;
3284 int java_lang_reflect_Constructor::_parameterTypes_offset;
3285 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3286 int java_lang_reflect_Constructor::_slot_offset;
3287 int java_lang_reflect_Constructor::_modifiers_offset;
3288 int java_lang_reflect_Constructor::_signature_offset;
3289 int java_lang_reflect_Constructor::_annotations_offset;
3290 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3291
3292 #define CONSTRUCTOR_FIELDS_DO(macro) \
3293 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3294 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3295 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3296 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3297 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3298 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3299 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3300 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3301
3302 void java_lang_reflect_Constructor::compute_offsets() {
3303 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3304 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3305 }
3306
3307 #if INCLUDE_CDS
3308 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3309 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3310 }
3311 #endif
3312
3313 Handle java_lang_reflect_Constructor::create(TRAPS) {
3314 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3315 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3316 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3317 InstanceKlass* ik = InstanceKlass::cast(k);
3318 // Ensure it is initialized
3319 ik->initialize(CHECK_NH);
3320 return ik->allocate_instance_handle(THREAD);
3321 }
3322
3323 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3324 return reflect->obj_field(_clazz_offset);
3325 }
3326
3327 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3328 reflect->obj_field_put(_clazz_offset, value);
3329 }
3330
3331 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3332 return constructor->obj_field(_parameterTypes_offset);
3333 }
3334
3335 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3336 constructor->obj_field_put(_parameterTypes_offset, value);
3337 }
3338
3339 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3340 constructor->obj_field_put(_exceptionTypes_offset, value);
3341 }
3342
3343 int java_lang_reflect_Constructor::slot(oop reflect) {
3344 return reflect->int_field(_slot_offset);
3345 }
3346
3347 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3348 reflect->int_field_put(_slot_offset, value);
3349 }
3350
3351 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3352 constructor->int_field_put(_modifiers_offset, value);
3353 }
3354
3355 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3356 constructor->obj_field_put(_signature_offset, value);
3357 }
3358
3359 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3360 constructor->obj_field_put(_annotations_offset, value);
3361 }
3362
3363 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3364 method->obj_field_put(_parameter_annotations_offset, value);
3365 }
3366
3367 int java_lang_reflect_Field::_clazz_offset;
3368 int java_lang_reflect_Field::_name_offset;
3369 int java_lang_reflect_Field::_type_offset;
3370 int java_lang_reflect_Field::_slot_offset;
3371 int java_lang_reflect_Field::_modifiers_offset;
3372 int java_lang_reflect_Field::_trusted_final_offset;
3373 int java_lang_reflect_Field::_signature_offset;
3374 int java_lang_reflect_Field::_annotations_offset;
3375
3376 #define FIELD_FIELDS_DO(macro) \
3377 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3378 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3379 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3380 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3381 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3382 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3383 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3384 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3385
3386 void java_lang_reflect_Field::compute_offsets() {
3387 InstanceKlass* k = vmClasses::reflect_Field_klass();
3388 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3389 }
3390
3391 #if INCLUDE_CDS
3392 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3393 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3394 }
3395 #endif
3396
3397 Handle java_lang_reflect_Field::create(TRAPS) {
3398 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3399 Symbol* name = vmSymbols::java_lang_reflect_Field();
3400 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3401 InstanceKlass* ik = InstanceKlass::cast(k);
3402 // Ensure it is initialized
3403 ik->initialize(CHECK_NH);
3404 return ik->allocate_instance_handle(THREAD);
3405 }
3406
3407 oop java_lang_reflect_Field::clazz(oop reflect) {
3408 return reflect->obj_field(_clazz_offset);
3409 }
3410
3411 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3412 reflect->obj_field_put(_clazz_offset, value);
3413 }
3414
3415 oop java_lang_reflect_Field::name(oop field) {
3416 return field->obj_field(_name_offset);
3417 }
3418
3419 void java_lang_reflect_Field::set_name(oop field, oop value) {
3420 field->obj_field_put(_name_offset, value);
3421 }
3422
3423 oop java_lang_reflect_Field::type(oop field) {
3424 return field->obj_field(_type_offset);
3425 }
3426
3427 void java_lang_reflect_Field::set_type(oop field, oop value) {
3428 field->obj_field_put(_type_offset, value);
3429 }
3430
3431 int java_lang_reflect_Field::slot(oop reflect) {
3432 return reflect->int_field(_slot_offset);
3433 }
3434
3435 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3436 reflect->int_field_put(_slot_offset, value);
3437 }
3438
3439 int java_lang_reflect_Field::modifiers(oop field) {
3440 return field->int_field(_modifiers_offset);
3441 }
3442
3443 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3444 field->int_field_put(_modifiers_offset, value);
3445 }
3446
3447 void java_lang_reflect_Field::set_trusted_final(oop field) {
3448 field->bool_field_put(_trusted_final_offset, true);
3449 }
3450
3451 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3452 field->obj_field_put(_signature_offset, value);
3453 }
3454
3455 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3456 field->obj_field_put(_annotations_offset, value);
3457 }
3458
3459 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3460 // Allocate java.lang.reflect.RecordComponent instance
3461 HandleMark hm(THREAD);
3462 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3463 assert(ik != nullptr, "must be loaded");
3464 ik->initialize(CHECK_NULL);
3465
3466 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3467
3468 Handle decl_class(THREAD, holder->java_mirror());
3469 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3470
3471 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3472 oop component_name = StringTable::intern(name, CHECK_NULL);
3473 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3474
3475 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3476 Handle component_type_h =
3477 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3478 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3479
3480 Method* accessor_method = nullptr;
3481 {
3482 // Prepend "()" to type to create the full method signature.
3483 ResourceMark rm(THREAD);
3484 int sig_len = type->utf8_length() + 3; // "()" and null char
3485 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3486 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3487 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3488 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3489 }
3490
3491 if (accessor_method != nullptr) {
3492 methodHandle method(THREAD, accessor_method);
3493 oop m = Reflection::new_method(method, false, CHECK_NULL);
3494 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3495 } else {
3496 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3497 }
3498
3499 int sig_index = component->generic_signature_index();
3500 if (sig_index > 0) {
3501 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3502 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3503 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3504 } else {
3505 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3506 }
3507
3508 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3509 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3510
3511 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3512 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3513
3514 return element();
3515 }
3516
3517 int reflect_ConstantPool::_oop_offset;
3518
3519 #define CONSTANTPOOL_FIELDS_DO(macro) \
3520 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3521
3522 void reflect_ConstantPool::compute_offsets() {
3523 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3524 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3525 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3526 }
3527
3528 #if INCLUDE_CDS
3529 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3530 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3531 }
3532 #endif
3533
3534 int java_lang_reflect_Parameter::_name_offset;
3535 int java_lang_reflect_Parameter::_modifiers_offset;
3536 int java_lang_reflect_Parameter::_index_offset;
3537 int java_lang_reflect_Parameter::_executable_offset;
3538
3539 #define PARAMETER_FIELDS_DO(macro) \
3540 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3541 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3542 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3543 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3544
3545 void java_lang_reflect_Parameter::compute_offsets() {
3546 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3547 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3548 }
3549
3550 #if INCLUDE_CDS
3551 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3552 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3553 }
3554 #endif
3555
3556 Handle java_lang_reflect_Parameter::create(TRAPS) {
3557 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3558 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3559 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3560 InstanceKlass* ik = InstanceKlass::cast(k);
3561 // Ensure it is initialized
3562 ik->initialize(CHECK_NH);
3563 return ik->allocate_instance_handle(THREAD);
3564 }
3565
3566 oop java_lang_reflect_Parameter::name(oop param) {
3567 return param->obj_field(_name_offset);
3568 }
3569
3570 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3571 param->obj_field_put(_name_offset, value);
3572 }
3573
3574 int java_lang_reflect_Parameter::modifiers(oop param) {
3575 return param->int_field(_modifiers_offset);
3576 }
3577
3578 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3579 param->int_field_put(_modifiers_offset, value);
3580 }
3581
3582 int java_lang_reflect_Parameter::index(oop param) {
3583 return param->int_field(_index_offset);
3584 }
3585
3586 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3587 param->int_field_put(_index_offset, value);
3588 }
3589
3590 oop java_lang_reflect_Parameter::executable(oop param) {
3591 return param->obj_field(_executable_offset);
3592 }
3593
3594 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3595 param->obj_field_put(_executable_offset, value);
3596 }
3597
3598 // java_lang_Module
3599
3600 int java_lang_Module::_loader_offset;
3601 int java_lang_Module::_name_offset;
3602 int java_lang_Module::_module_entry_offset;
3603
3604 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3605 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3606 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3607 vmSymbols::java_lang_module_init_signature(),
3608 loader, module_name, CHECK_NH);
3609 }
3610
3611 #define MODULE_FIELDS_DO(macro) \
3612 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3613 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3614
3615 void java_lang_Module::compute_offsets() {
3616 InstanceKlass* k = vmClasses::Module_klass();
3617 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3618 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3619 }
3620
3621 #if INCLUDE_CDS
3622 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3623 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3624 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3625 }
3626 #endif
3627
3628 oop java_lang_Module::loader(oop module) {
3629 return module->obj_field(_loader_offset);
3630 }
3631
3632 void java_lang_Module::set_loader(oop module, oop value) {
3633 module->obj_field_put(_loader_offset, value);
3634 }
3635
3636 oop java_lang_Module::name(oop module) {
3637 return module->obj_field(_name_offset);
3638 }
3639
3640 void java_lang_Module::set_name(oop module, oop value) {
3641 module->obj_field_put(_name_offset, value);
3642 }
3643
3644 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3645 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3646 assert(module != nullptr, "module can't be null");
3647 assert(oopDesc::is_oop(module), "module must be oop");
3648
3649 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3650 return module_entry;
3651 }
3652
3653 ModuleEntry* java_lang_Module::module_entry(oop module) {
3654 ModuleEntry* module_entry = module_entry_raw(module);
3655 if (module_entry == nullptr) {
3656 // If the inject field containing the ModuleEntry* is null then return the
3657 // class loader's unnamed module.
3658 oop loader = java_lang_Module::loader(module);
3659 Handle h_loader = Handle(Thread::current(), loader);
3660 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3661 return loader_cld->unnamed_module();
3662 }
3663 return module_entry;
3664 }
3665
3666 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3667 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3668 assert(module != nullptr, "module can't be null");
3669 assert(oopDesc::is_oop(module), "module must be oop");
3670 module->address_field_put(_module_entry_offset, (address)module_entry);
3671 }
3672
3673 Handle reflect_ConstantPool::create(TRAPS) {
3674 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3675 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3676 // Ensure it is initialized
3677 k->initialize(CHECK_NH);
3678 return k->allocate_instance_handle(THREAD);
3679 }
3680
3681
3682 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3683 oop mirror = value->pool_holder()->java_mirror();
3684 // Save the mirror to get back the constant pool.
3685 reflect->obj_field_put(_oop_offset, mirror);
3686 }
3687
3688 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3689
3690 oop mirror = reflect->obj_field(_oop_offset);
3691 Klass* k = java_lang_Class::as_Klass(mirror);
3692 assert(k->is_instance_klass(), "Must be");
3693
3694 // Get the constant pool back from the klass. Since class redefinition
3695 // merges the new constant pool into the old, this is essentially the
3696 // same constant pool as the original. If constant pool merging is
3697 // no longer done in the future, this will have to change to save
3698 // the original.
3699 return InstanceKlass::cast(k)->constants();
3700 }
3701
3702
3703 // Support for java_lang_ref_Reference
3704
3705 bool java_lang_ref_Reference::_offsets_initialized;
3706
3707 int java_lang_ref_Reference::_referent_offset;
3708 int java_lang_ref_Reference::_queue_offset;
3709 int java_lang_ref_Reference::_next_offset;
3710 int java_lang_ref_Reference::_discovered_offset;
3711
3712 #define REFERENCE_FIELDS_DO(macro) \
3713 macro(_referent_offset, k, "referent", object_signature, false); \
3714 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3715 macro(_next_offset, k, "next", reference_signature, false); \
3716 macro(_discovered_offset, k, "discovered", reference_signature, false);
3717
3718 void java_lang_ref_Reference::compute_offsets() {
3719 if (_offsets_initialized) {
3720 return;
3721 }
3722 _offsets_initialized = true;
3723 InstanceKlass* k = vmClasses::Reference_klass();
3724 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3725 }
3726
3727 #if INCLUDE_CDS
3728 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3729 f->do_bool(&_offsets_initialized);
3730 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3731 }
3732 #endif
3733
3734 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3735 assert(obj != nullptr, "sanity");
3736 if (offset != _referent_offset) {
3737 return false;
3738 }
3739
3740 Klass* k = obj->klass();
3741 if (!k->is_instance_klass()) {
3742 return false;
3743 }
3744
3745 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3746 bool is_reference = ik->reference_type() != REF_NONE;
3747 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3748 return is_reference;
3749 }
3750
3751 int java_lang_boxing_object::_value_offset;
3752 int java_lang_boxing_object::_long_value_offset;
3753
3754 #define BOXING_FIELDS_DO(macro) \
3755 macro(_value_offset, integerKlass, "value", int_signature, false); \
3756 macro(_long_value_offset, longKlass, "value", long_signature, false);
3757
3758 void java_lang_boxing_object::compute_offsets() {
3759 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3760 InstanceKlass* longKlass = vmClasses::Long_klass();
3761 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3762 }
3763
3764 #if INCLUDE_CDS
3765 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3766 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3767 }
3768 #endif
3769
3770 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3771 Klass* k = vmClasses::box_klass(type);
3772 if (k == nullptr) return nullptr;
3773 InstanceKlass* ik = InstanceKlass::cast(k);
3774 if (!ik->is_initialized()) {
3775 ik->initialize(CHECK_NULL);
3776 }
3777 return ik->allocate_instance(THREAD);
3778 }
3779
3780
3781 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3782 oop box = initialize_and_allocate(type, CHECK_NULL);
3783 if (box == nullptr) return nullptr;
3784 switch (type) {
3785 case T_BOOLEAN:
3786 box->bool_field_put(_value_offset, value->z);
3787 break;
3788 case T_CHAR:
3789 box->char_field_put(_value_offset, value->c);
3790 break;
3791 case T_FLOAT:
3792 box->float_field_put(_value_offset, value->f);
3793 break;
3794 case T_DOUBLE:
3795 box->double_field_put(_long_value_offset, value->d);
3796 break;
3797 case T_BYTE:
3798 box->byte_field_put(_value_offset, value->b);
3799 break;
3800 case T_SHORT:
3801 box->short_field_put(_value_offset, value->s);
3802 break;
3803 case T_INT:
3804 box->int_field_put(_value_offset, value->i);
3805 break;
3806 case T_LONG:
3807 box->long_field_put(_long_value_offset, value->j);
3808 break;
3809 default:
3810 return nullptr;
3811 }
3812 return box;
3813 }
3814
3815
3816 BasicType java_lang_boxing_object::basic_type(oop box) {
3817 if (box == nullptr) return T_ILLEGAL;
3818 BasicType type = vmClasses::box_klass_type(box->klass());
3819 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3820 return T_ILLEGAL;
3821 return type;
3822 }
3823
3824
3825 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3826 BasicType type = vmClasses::box_klass_type(box->klass());
3827 switch (type) {
3828 case T_BOOLEAN:
3829 value->z = box->bool_field(_value_offset);
3830 break;
3831 case T_CHAR:
3832 value->c = box->char_field(_value_offset);
3833 break;
3834 case T_FLOAT:
3835 value->f = box->float_field(_value_offset);
3836 break;
3837 case T_DOUBLE:
3838 value->d = box->double_field(_long_value_offset);
3839 break;
3840 case T_BYTE:
3841 value->b = box->byte_field(_value_offset);
3842 break;
3843 case T_SHORT:
3844 value->s = box->short_field(_value_offset);
3845 break;
3846 case T_INT:
3847 value->i = box->int_field(_value_offset);
3848 break;
3849 case T_LONG:
3850 value->j = box->long_field(_long_value_offset);
3851 break;
3852 default:
3853 return T_ILLEGAL;
3854 } // end switch
3855 return type;
3856 }
3857
3858
3859 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3860 BasicType type = vmClasses::box_klass_type(box->klass());
3861 switch (type) {
3862 case T_BOOLEAN:
3863 box->bool_field_put(_value_offset, value->z);
3864 break;
3865 case T_CHAR:
3866 box->char_field_put(_value_offset, value->c);
3867 break;
3868 case T_FLOAT:
3869 box->float_field_put(_value_offset, value->f);
3870 break;
3871 case T_DOUBLE:
3872 box->double_field_put(_long_value_offset, value->d);
3873 break;
3874 case T_BYTE:
3875 box->byte_field_put(_value_offset, value->b);
3876 break;
3877 case T_SHORT:
3878 box->short_field_put(_value_offset, value->s);
3879 break;
3880 case T_INT:
3881 box->int_field_put(_value_offset, value->i);
3882 break;
3883 case T_LONG:
3884 box->long_field_put(_long_value_offset, value->j);
3885 break;
3886 default:
3887 return T_ILLEGAL;
3888 } // end switch
3889 return type;
3890 }
3891
3892
3893 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3894 switch (type) {
3895 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3896 case T_CHAR: st->print("%d", value->c); break;
3897 case T_BYTE: st->print("%d", value->b); break;
3898 case T_SHORT: st->print("%d", value->s); break;
3899 case T_INT: st->print("%d", value->i); break;
3900 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3901 case T_FLOAT: st->print("%f", value->f); break;
3902 case T_DOUBLE: st->print("%lf", value->d); break;
3903 default: st->print("type %d?", type); break;
3904 }
3905 }
3906
3907
3908 // Support for java_lang_ref_SoftReference
3909 //
3910
3911 int java_lang_ref_SoftReference::_timestamp_offset;
3912 int java_lang_ref_SoftReference::_static_clock_offset;
3913
3914 #define SOFTREFERENCE_FIELDS_DO(macro) \
3915 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
3916 macro(_static_clock_offset, k, "clock", long_signature, true)
3917
3918 void java_lang_ref_SoftReference::compute_offsets() {
3919 InstanceKlass* k = vmClasses::SoftReference_klass();
3920 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3921 }
3922
3923 #if INCLUDE_CDS
3924 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3925 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3926 }
3927 #endif
3928
3929 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3930 return ref->long_field(_timestamp_offset);
3931 }
3932
3933 jlong java_lang_ref_SoftReference::clock() {
3934 InstanceKlass* ik = vmClasses::SoftReference_klass();
3935 oop base = ik->static_field_base_raw();
3936 return base->long_field(_static_clock_offset);
3937 }
3938
3939 void java_lang_ref_SoftReference::set_clock(jlong value) {
3940 InstanceKlass* ik = vmClasses::SoftReference_klass();
3941 oop base = ik->static_field_base_raw();
3942 base->long_field_put(_static_clock_offset, value);
3943 }
3944
3945 // Support for java_lang_invoke_DirectMethodHandle
3946
3947 int java_lang_invoke_DirectMethodHandle::_member_offset;
3948
3949 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3950 oop member_name = nullptr;
3951 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3952 "a DirectMethodHandle oop is expected");
3953 return dmh->obj_field(_member_offset);
3954 }
3955
3956 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3957 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3958
3959 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3960 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
3961 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3962 }
3963
3964 #if INCLUDE_CDS
3965 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3966 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3967 }
3968 #endif
3969
3970 // Support for java_lang_invoke_MethodHandle
3971
3972 int java_lang_invoke_MethodHandle::_type_offset;
3973 int java_lang_invoke_MethodHandle::_form_offset;
3974
3975 int java_lang_invoke_MemberName::_clazz_offset;
3976 int java_lang_invoke_MemberName::_name_offset;
3977 int java_lang_invoke_MemberName::_type_offset;
3978 int java_lang_invoke_MemberName::_flags_offset;
3979 int java_lang_invoke_MemberName::_method_offset;
3980 int java_lang_invoke_MemberName::_vmindex_offset;
3981
3982 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3983 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3984
3985 int java_lang_invoke_LambdaForm::_vmentry_offset;
3986
3987 #define METHODHANDLE_FIELDS_DO(macro) \
3988 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3989 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3990
3991 void java_lang_invoke_MethodHandle::compute_offsets() {
3992 InstanceKlass* k = vmClasses::MethodHandle_klass();
3993 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3994 }
3995
3996 #if INCLUDE_CDS
3997 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3998 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3999 }
4000 #endif
4001
4002 #define MEMBERNAME_FIELDS_DO(macro) \
4003 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4004 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4005 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4006 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4007 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4008
4009 void java_lang_invoke_MemberName::compute_offsets() {
4010 InstanceKlass* k = vmClasses::MemberName_klass();
4011 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4012 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4013 }
4014
4015 #if INCLUDE_CDS
4016 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4017 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4018 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4019 }
4020 #endif
4021
4022 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4023 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4024
4025 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4026 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4027 assert(k != nullptr, "jdk mismatch");
4028 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4029 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4030 }
4031
4032 #if INCLUDE_CDS
4033 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4034 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4035 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4036 }
4037 #endif
4038
4039 #define LAMBDAFORM_FIELDS_DO(macro) \
4040 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4041
4042 void java_lang_invoke_LambdaForm::compute_offsets() {
4043 InstanceKlass* k = vmClasses::LambdaForm_klass();
4044 assert (k != nullptr, "jdk mismatch");
4045 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4046 }
4047
4048 #if INCLUDE_CDS
4049 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4050 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4051 }
4052 #endif
4053
4054 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4055 return obj != nullptr && is_subclass(obj->klass());
4056 }
4057
4058 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4059 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4060
4061 #define NEP_FIELDS_DO(macro) \
4062 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4063 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4064
4065 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4066 return obj != nullptr && is_subclass(obj->klass());
4067 }
4068
4069 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4070 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4071 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4072 }
4073
4074 #if INCLUDE_CDS
4075 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4076 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4077 }
4078 #endif
4079
4080 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4081 return entry->obj_field(_method_type_offset);
4082 }
4083
4084 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4085 return entry->long_field(_downcall_stub_address_offset);
4086 }
4087
4088 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4089 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4090 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4091 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4092 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4093 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4094 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4095
4096 #define ABIDescriptor_FIELDS_DO(macro) \
4097 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4098 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4099 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4100 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4101 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4102 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4103 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4104
4105 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4106 return obj != nullptr && is_subclass(obj->klass());
4107 }
4108
4109 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4110 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4111 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4112 }
4113
4114 #if INCLUDE_CDS
4115 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4116 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4117 }
4118 #endif
4119
4120 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4121 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4122 }
4123
4124 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4125 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4126 }
4127
4128 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4129 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4130 }
4131
4132 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4133 return entry->int_field(_stackAlignment_offset);
4134 }
4135
4136 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4137 return entry->int_field(_shadowSpace_offset);
4138 }
4139
4140 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4141 return entry->obj_field(_scratch1_offset);
4142 }
4143
4144 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4145 return entry->obj_field(_scratch2_offset);
4146 }
4147
4148 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4149 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4150 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4151 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4152
4153 #define VMStorage_FIELDS_DO(macro) \
4154 macro(_type_offset, k, "type", byte_signature, false); \
4155 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4156 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4157 macro(_debugName_offset, k, "debugName", string_signature, false); \
4158
4159 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4160 return obj != nullptr && is_subclass(obj->klass());
4161 }
4162
4163 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4164 InstanceKlass* k = vmClasses::VMStorage_klass();
4165 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4166 }
4167
4168 #if INCLUDE_CDS
4169 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4170 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4171 }
4172 #endif
4173
4174 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4175 return entry->byte_field(_type_offset);
4176 }
4177
4178 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4179 return entry->int_field(_indexOrOffset_offset);
4180 }
4181
4182 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4183 return entry->short_field(_segmentMaskOrSize_offset);
4184 }
4185
4186 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4187 return entry->obj_field(_debugName_offset);
4188 }
4189
4190 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4191 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4192
4193 #define CallConv_FIELDS_DO(macro) \
4194 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4195 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4196
4197 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4198 return obj != nullptr && is_subclass(obj->klass());
4199 }
4200
4201 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4202 InstanceKlass* k = vmClasses::CallConv_klass();
4203 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4204 }
4205
4206 #if INCLUDE_CDS
4207 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4208 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4209 }
4210 #endif
4211
4212 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4213 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4214 }
4215
4216 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4217 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4218 }
4219
4220 oop java_lang_invoke_MethodHandle::type(oop mh) {
4221 return mh->obj_field(_type_offset);
4222 }
4223
4224 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4225 mh->obj_field_put(_type_offset, mtype);
4226 }
4227
4228 oop java_lang_invoke_MethodHandle::form(oop mh) {
4229 assert(_form_offset != 0, "");
4230 return mh->obj_field(_form_offset);
4231 }
4232
4233 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4234 assert(_form_offset != 0, "");
4235 mh->obj_field_put(_form_offset, lform);
4236 }
4237
4238 /// MemberName accessors
4239
4240 oop java_lang_invoke_MemberName::clazz(oop mname) {
4241 assert(is_instance(mname), "wrong type");
4242 return mname->obj_field(_clazz_offset);
4243 }
4244
4245 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4246 assert(is_instance(mname), "wrong type");
4247 mname->obj_field_put(_clazz_offset, clazz);
4248 }
4249
4250 oop java_lang_invoke_MemberName::name(oop mname) {
4251 assert(is_instance(mname), "wrong type");
4252 return mname->obj_field(_name_offset);
4253 }
4254
4255 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4256 assert(is_instance(mname), "wrong type");
4257 mname->obj_field_put(_name_offset, name);
4258 }
4259
4260 oop java_lang_invoke_MemberName::type(oop mname) {
4261 assert(is_instance(mname), "wrong type");
4262 return mname->obj_field(_type_offset);
4263 }
4264
4265 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4266 assert(is_instance(mname), "wrong type");
4267 mname->obj_field_put(_type_offset, type);
4268 }
4269
4270 int java_lang_invoke_MemberName::flags(oop mname) {
4271 assert(is_instance(mname), "wrong type");
4272 return mname->int_field(_flags_offset);
4273 }
4274
4275 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4276 assert(is_instance(mname), "wrong type");
4277 mname->int_field_put(_flags_offset, flags);
4278 }
4279
4280
4281 // Return vmtarget from ResolvedMethodName method field through indirection
4282 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4283 assert(is_instance(mname), "wrong type");
4284 oop method = mname->obj_field(_method_offset);
4285 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4286 }
4287
4288 bool java_lang_invoke_MemberName::is_method(oop mname) {
4289 assert(is_instance(mname), "must be MemberName");
4290 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4291 }
4292
4293 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4294 assert(is_instance(mname), "wrong type");
4295 mname->obj_field_put(_method_offset, resolved_method);
4296 }
4297
4298 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4299 assert(is_instance(mname), "wrong type");
4300 return (intptr_t) mname->address_field(_vmindex_offset);
4301 }
4302
4303 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4304 assert(is_instance(mname), "wrong type");
4305 mname->address_field_put(_vmindex_offset, (address) index);
4306 }
4307
4308
4309 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4310 assert(is_instance(resolved_method), "wrong type");
4311 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4312 assert(m->is_method(), "must be");
4313 return m;
4314 }
4315
4316 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4317 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4318 assert(is_instance(resolved_method), "wrong type");
4319 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4320 }
4321
4322 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4323 assert(is_instance(resolved_method), "wrong type");
4324 resolved_method->obj_field_put(_vmholder_offset, holder);
4325 }
4326
4327 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4328 const Method* method = m();
4329
4330 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4331 oop resolved_method = ResolvedMethodTable::find_method(method);
4332 if (resolved_method != nullptr) {
4333 return resolved_method;
4334 }
4335
4336 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4337 if (!k->is_initialized()) {
4338 k->initialize(CHECK_NULL);
4339 }
4340
4341 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4342
4343 NoSafepointVerifier nsv;
4344
4345 if (method->is_old()) {
4346 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4347 method->get_new_method();
4348 }
4349
4350 InstanceKlass* holder = method->method_holder();
4351
4352 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4353 // Add a reference to the loader (actually mirror because hidden classes may not have
4354 // distinct loaders) to ensure the metadata is kept alive.
4355 // This mirror may be different than the one in clazz field.
4356 set_vmholder(new_resolved_method, holder->java_mirror());
4357
4358 // Set flag in class to indicate this InstanceKlass has entries in the table
4359 // to avoid walking table during redefinition if none of the redefined classes
4360 // have any membernames in the table.
4361 holder->set_has_resolved_methods();
4362
4363 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4364 }
4365
4366 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4367 assert(is_instance(lform), "wrong type");
4368 return lform->obj_field(_vmentry_offset);
4369 }
4370
4371
4372 // Support for java_lang_invoke_MethodType
4373
4374 int java_lang_invoke_MethodType::_rtype_offset;
4375 int java_lang_invoke_MethodType::_ptypes_offset;
4376
4377 #define METHODTYPE_FIELDS_DO(macro) \
4378 macro(_rtype_offset, k, "rtype", class_signature, false); \
4379 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4380
4381 void java_lang_invoke_MethodType::compute_offsets() {
4382 InstanceKlass* k = vmClasses::MethodType_klass();
4383 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4384 }
4385
4386 #if INCLUDE_CDS
4387 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4388 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4389 }
4390 #endif
4391
4392 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4393 st->print("(");
4394 objArrayOop pts = ptypes(mt);
4395 if (pts != nullptr) {
4396 for (int i = 0, limit = pts->length(); i < limit; i++) {
4397 java_lang_Class::print_signature(pts->obj_at(i), st);
4398 }
4399 } else {
4400 st->print("null");
4401 }
4402 st->print(")");
4403 oop rt = rtype(mt);
4404 if (rt != nullptr) {
4405 java_lang_Class::print_signature(rt, st);
4406 } else {
4407 st->print("null");
4408 }
4409 }
4410
4411 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4412 ResourceMark rm;
4413 stringStream buffer(128);
4414 print_signature(mt, &buffer);
4415 const char* sigstr = buffer.base();
4416 int siglen = (int) buffer.size();
4417 Symbol *name;
4418 if (!intern_if_not_found) {
4419 name = SymbolTable::probe(sigstr, siglen);
4420 } else {
4421 name = SymbolTable::new_symbol(sigstr, siglen);
4422 }
4423 return name;
4424 }
4425
4426 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4427 if (mt1 == mt2)
4428 return true;
4429 if (rtype(mt1) != rtype(mt2))
4430 return false;
4431 if (ptype_count(mt1) != ptype_count(mt2))
4432 return false;
4433 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4434 if (ptype(mt1, i) != ptype(mt2, i))
4435 return false;
4436 }
4437 return true;
4438 }
4439
4440 oop java_lang_invoke_MethodType::rtype(oop mt) {
4441 assert(is_instance(mt), "must be a MethodType");
4442 return mt->obj_field(_rtype_offset);
4443 }
4444
4445 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4446 assert(is_instance(mt), "must be a MethodType");
4447 return (objArrayOop) mt->obj_field(_ptypes_offset);
4448 }
4449
4450 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4451 return ptypes(mt)->obj_at(idx);
4452 }
4453
4454 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4455 return ptypes(mt)->length();
4456 }
4457
4458 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4459 objArrayOop pts = ptypes(mt);
4460 int count = pts->length();
4461 int slots = 0;
4462 for (int i = 0; i < count; i++) {
4463 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4464 slots += type2size[bt];
4465 }
4466 return slots;
4467 }
4468
4469 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4470 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4471 return type2size[bt];
4472 }
4473
4474
4475 // Support for java_lang_invoke_CallSite
4476
4477 int java_lang_invoke_CallSite::_target_offset;
4478 int java_lang_invoke_CallSite::_context_offset;
4479
4480 #define CALLSITE_FIELDS_DO(macro) \
4481 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4482 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4483
4484 void java_lang_invoke_CallSite::compute_offsets() {
4485 InstanceKlass* k = vmClasses::CallSite_klass();
4486 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4487 }
4488
4489 #if INCLUDE_CDS
4490 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4491 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4492 }
4493 #endif
4494
4495 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4496 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4497
4498 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4499 return dep_oop;
4500 }
4501
4502 // Support for java_lang_invoke_ConstantCallSite
4503
4504 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4505
4506 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4507 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4508
4509 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4510 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4511 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4512 }
4513
4514 #if INCLUDE_CDS
4515 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4516 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4517 }
4518 #endif
4519
4520 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4521
4522 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4523 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4524
4525 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4526 InstanceKlass* k = vmClasses::Context_klass();
4527 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4528 }
4529
4530 #if INCLUDE_CDS
4531 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4532 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4533 }
4534 #endif
4535
4536 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4537 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4538 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4539 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4540 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4541 return dep_ctx;
4542 }
4543
4544 // Support for java_security_AccessControlContext
4545
4546 int java_security_AccessControlContext::_context_offset;
4547 int java_security_AccessControlContext::_privilegedContext_offset;
4548 int java_security_AccessControlContext::_isPrivileged_offset;
4549 int java_security_AccessControlContext::_isAuthorized_offset;
4550
4551 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4552 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4553 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4554 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4555 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4556
4557 void java_security_AccessControlContext::compute_offsets() {
4558 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4559 InstanceKlass* k = vmClasses::AccessControlContext_klass();
4560 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4561 }
4562
4563 #if INCLUDE_CDS
4564 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4565 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4566 }
4567 #endif
4568
4569 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4570 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4571 assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4572 // Ensure klass is initialized
4573 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4574 // Allocate result
4575 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4576 // Fill in values
4577 result->obj_field_put(_context_offset, context());
4578 result->obj_field_put(_privilegedContext_offset, privileged_context());
4579 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4580 result->bool_field_put(_isAuthorized_offset, true);
4581 return result;
4582 }
4583
4584
4585 // Support for java_lang_ClassLoader
4586
4587 int java_lang_ClassLoader::_loader_data_offset;
4588 int java_lang_ClassLoader::_parallelCapable_offset;
4589 int java_lang_ClassLoader::_name_offset;
4590 int java_lang_ClassLoader::_nameAndId_offset;
4591 int java_lang_ClassLoader::_unnamedModule_offset;
4592 int java_lang_ClassLoader::_parent_offset;
4593
4594 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4595 assert(loader != nullptr, "loader must not be null");
4596 assert(oopDesc::is_oop(loader), "loader must be oop");
4597 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4598 }
4599
4600 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4601 assert(loader != nullptr, "loader must not be null");
4602 assert(oopDesc::is_oop(loader), "loader must be oop");
4603 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4604 }
4605
4606 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4607 assert(loader != nullptr, "loader must not be null");
4608 assert(oopDesc::is_oop(loader), "loader must be oop");
4609 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4610 }
4611
4612 #define CLASSLOADER_FIELDS_DO(macro) \
4613 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4614 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4615 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4616 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4617 macro(_parent_offset, k1, "parent", classloader_signature, false)
4618
4619 void java_lang_ClassLoader::compute_offsets() {
4620 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4621 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4622
4623 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4624 }
4625
4626 #if INCLUDE_CDS
4627 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4628 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4629 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4630 }
4631 #endif
4632
4633 oop java_lang_ClassLoader::parent(oop loader) {
4634 assert(is_instance(loader), "loader must be oop");
4635 return loader->obj_field(_parent_offset);
4636 }
4637
4638 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4639 assert(is_instance(loader), "loader must be oop");
4640 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4641 }
4642
4643 // Returns the name field of this class loader. If the name field has not
4644 // been set, null will be returned.
4645 oop java_lang_ClassLoader::name(oop loader) {
4646 assert(is_instance(loader), "loader must be oop");
4647 return loader->obj_field(_name_offset);
4648 }
4649
4650 // Returns the nameAndId field of this class loader. The format is
4651 // as follows:
4652 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4653 // If the defining loader has no name then <qualified-class-name> @<id>
4654 // If built-in loader, then omit '@<id>' as there is only one instance.
4655 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4656 oop java_lang_ClassLoader::nameAndId(oop loader) {
4657 assert(is_instance(loader), "loader must be oop");
4658 return loader->obj_field(_nameAndId_offset);
4659 }
4660
4661 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4662 assert(is_instance(loader), "loader must be oop");
4663 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4664 oop acl = loader;
4665 debug_only(jint loop_count = 0);
4666 // This loop taken verbatim from ClassLoader.java:
4667 do {
4668 acl = parent(acl);
4669 if (cl == acl) {
4670 return true;
4671 }
4672 assert(++loop_count > 0, "loop_count overflow");
4673 } while (acl != nullptr);
4674 return false;
4675 }
4676
4677 bool java_lang_ClassLoader::is_instance(oop obj) {
4678 return obj != nullptr && is_subclass(obj->klass());
4679 }
4680
4681
4682 // For class loader classes, parallelCapable defined
4683 // based on non-null field
4684 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4685 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4686 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4687 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4688 }
4689
4690 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4691 // Fix for 4474172; see evaluation for more details
4692 loader = non_reflection_class_loader(loader);
4693
4694 oop cl = SystemDictionary::java_system_loader();
4695 while(cl != nullptr) {
4696 if (cl == loader) return true;
4697 cl = parent(cl);
4698 }
4699 return false;
4700 }
4701
4702 // Return true if this is one of the class loaders associated with
4703 // the generated bytecodes for serialization constructor returned
4704 // by sun.reflect.ReflectionFactory::newConstructorForSerialization
4705 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4706 if (loader != nullptr) {
4707 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4708 // This might be null in non-1.4 JDKs
4709 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4710 }
4711 return false;
4712 }
4713
4714 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4715 // See whether this is one of the class loaders associated with
4716 // the generated bytecodes for reflection, and if so, "magically"
4717 // delegate to its parent to prevent class loading from occurring
4718 // in places where applications using reflection didn't expect it.
4719 if (is_reflection_class_loader(loader)) {
4720 return parent(loader);
4721 }
4722 return loader;
4723 }
4724
4725 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4726 assert(is_instance(loader), "loader must be oop");
4727 return loader->obj_field(_unnamedModule_offset);
4728 }
4729
4730 // Support for java_lang_System
4731 //
4732
4733 int java_lang_System::_static_in_offset;
4734 int java_lang_System::_static_out_offset;
4735 int java_lang_System::_static_err_offset;
4736 int java_lang_System::_static_security_offset;
4737 int java_lang_System::_static_allow_security_offset;
4738 int java_lang_System::_static_never_offset;
4739
4740 #define SYSTEM_FIELDS_DO(macro) \
4741 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4742 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4743 macro(_static_err_offset, k, "err", print_stream_signature, true); \
4744 macro(_static_security_offset, k, "security", security_manager_signature, true); \
4745 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4746 macro(_static_never_offset, k, "NEVER", int_signature, true)
4747
4748 void java_lang_System::compute_offsets() {
4749 InstanceKlass* k = vmClasses::System_klass();
4750 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4751 }
4752
4753 // This field tells us that a security manager can never be installed so we
4754 // can completely skip populating the ProtectionDomainCacheTable.
4755 bool java_lang_System::allow_security_manager() {
4756 static int initialized = false;
4757 static bool allowed = true; // default
4758 if (!initialized) {
4759 oop base = vmClasses::System_klass()->static_field_base_raw();
4760 int never = base->int_field(_static_never_offset);
4761 allowed = (base->int_field(_static_allow_security_offset) != never);
4762 initialized = true;
4763 }
4764 return allowed;
4765 }
4766
4767 // This field tells us that a security manager is installed.
4768 bool java_lang_System::has_security_manager() {
4769 oop base = vmClasses::System_klass()->static_field_base_raw();
4770 return base->obj_field(_static_security_offset) != nullptr;
4771 }
4772
4773 #if INCLUDE_CDS
4774 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4775 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4776 }
4777 #endif
4778
4779 // Support for jdk_internal_misc_UnsafeConstants
4780 //
4781 class UnsafeConstantsFixup : public FieldClosure {
4782 private:
4783 int _address_size;
4784 int _page_size;
4785 bool _big_endian;
4786 bool _use_unaligned_access;
4787 int _data_cache_line_flush_size;
4788 public:
4789 UnsafeConstantsFixup() {
4790 // round up values for all static final fields
4791 _address_size = sizeof(void*);
4792 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4793 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4794 _use_unaligned_access = UseUnalignedAccesses;
4795 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4796 }
4797
4798 void do_field(fieldDescriptor* fd) {
4799 oop mirror = fd->field_holder()->java_mirror();
4800 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4801 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4802 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4803 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4804 if (fd->name() == vmSymbols::address_size_name()) {
4805 mirror->int_field_put(fd->offset(), _address_size);
4806 } else if (fd->name() == vmSymbols::page_size_name()) {
4807 mirror->int_field_put(fd->offset(), _page_size);
4808 } else if (fd->name() == vmSymbols::big_endian_name()) {
4809 mirror->bool_field_put(fd->offset(), _big_endian);
4810 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4811 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4812 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4813 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4814 } else {
4815 assert(false, "unexpected UnsafeConstants field");
4816 }
4817 }
4818 };
4819
4820 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4821 UnsafeConstantsFixup fixup;
4822 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4823 }
4824
4825
4826 // java_lang_StackTraceElement
4827
4828 int java_lang_StackTraceElement::_methodName_offset;
4829 int java_lang_StackTraceElement::_fileName_offset;
4830 int java_lang_StackTraceElement::_lineNumber_offset;
4831 int java_lang_StackTraceElement::_moduleName_offset;
4832 int java_lang_StackTraceElement::_moduleVersion_offset;
4833 int java_lang_StackTraceElement::_classLoaderName_offset;
4834 int java_lang_StackTraceElement::_declaringClass_offset;
4835 int java_lang_StackTraceElement::_declaringClassObject_offset;
4836
4837 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4838 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4839 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4840 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4841 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4842 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4843 macro(_methodName_offset, k, "methodName", string_signature, false); \
4844 macro(_fileName_offset, k, "fileName", string_signature, false); \
4845 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4846
4847 // Support for java_lang_StackTraceElement
4848 void java_lang_StackTraceElement::compute_offsets() {
4849 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4850 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4851 }
4852
4853 #if INCLUDE_CDS
4854 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4855 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4856 }
4857 #endif
4858
4859 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4860 element->obj_field_put(_fileName_offset, value);
4861 }
4862
4863 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4864 element->obj_field_put(_declaringClass_offset, value);
4865 }
4866
4867 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4868 element->obj_field_put(_methodName_offset, value);
4869 }
4870
4871 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4872 element->int_field_put(_lineNumber_offset, value);
4873 }
4874
4875 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4876 element->obj_field_put(_moduleName_offset, value);
4877 }
4878
4879 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4880 element->obj_field_put(_moduleVersion_offset, value);
4881 }
4882
4883 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4884 element->obj_field_put(_classLoaderName_offset, value);
4885 }
4886
4887 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4888 element->obj_field_put(_declaringClassObject_offset, value);
4889 }
4890
4891
4892 // java_lang_AssertionStatusDirectives
4893
4894 int java_lang_AssertionStatusDirectives::_classes_offset;
4895 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4896 int java_lang_AssertionStatusDirectives::_packages_offset;
4897 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4898 int java_lang_AssertionStatusDirectives::_deflt_offset;
4899
4900 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4901 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4902 macro(_classes_offset, k, "classes", string_array_signature, false); \
4903 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4904 macro(_packages_offset, k, "packages", string_array_signature, false); \
4905 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4906 macro(_deflt_offset, k, "deflt", bool_signature, false)
4907
4908 void java_lang_AssertionStatusDirectives::compute_offsets() {
4909 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4910 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4911 }
4912
4913 #if INCLUDE_CDS
4914 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4915 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4916 }
4917 #endif
4918
4919 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4920 o->obj_field_put(_classes_offset, val);
4921 }
4922
4923 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4924 o->obj_field_put(_classEnabled_offset, val);
4925 }
4926
4927 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4928 o->obj_field_put(_packages_offset, val);
4929 }
4930
4931 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4932 o->obj_field_put(_packageEnabled_offset, val);
4933 }
4934
4935 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4936 o->bool_field_put(_deflt_offset, val);
4937 }
4938
4939 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4940
4941 #define AOS_FIELDS_DO(macro) \
4942 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4943
4944 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4945 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4946 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4947 }
4948
4949 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4950 assert(_owner_offset != 0, "Must be initialized");
4951 return obj->obj_field(_owner_offset);
4952 }
4953
4954 #if INCLUDE_CDS
4955 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4956 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4957 }
4958 #endif
4959
4960 int vector_VectorPayload::_payload_offset;
4961
4962 #define VECTORPAYLOAD_FIELDS_DO(macro) \
4963 macro(_payload_offset, k, "payload", object_signature, false)
4964
4965 void vector_VectorPayload::compute_offsets() {
4966 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
4967 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4968 }
4969
4970 #if INCLUDE_CDS
4971 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
4972 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4973 }
4974 #endif
4975
4976 void vector_VectorPayload::set_payload(oop o, oop val) {
4977 o->obj_field_put(_payload_offset, val);
4978 }
4979
4980 bool vector_VectorPayload::is_instance(oop obj) {
4981 return obj != nullptr && is_subclass(obj->klass());
4982 }
4983
4984 int java_lang_Integer_IntegerCache::_static_cache_offset;
4985 int java_lang_Long_LongCache::_static_cache_offset;
4986 int java_lang_Character_CharacterCache::_static_cache_offset;
4987 int java_lang_Short_ShortCache::_static_cache_offset;
4988 int java_lang_Byte_ByteCache::_static_cache_offset;
4989
4990 #define INTEGER_CACHE_FIELDS_DO(macro) \
4991 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4992
4993 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4994 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
4995 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4996 }
4997
4998 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4999 oop base = ik->static_field_base_raw();
5000 return objArrayOop(base->obj_field(_static_cache_offset));
5001 }
5002
5003 Symbol* java_lang_Integer_IntegerCache::symbol() {
5004 return vmSymbols::java_lang_Integer_IntegerCache();
5005 }
5006
5007 #if INCLUDE_CDS
5008 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5009 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5010 }
5011 #endif
5012 #undef INTEGER_CACHE_FIELDS_DO
5013
5014 jint java_lang_Integer::value(oop obj) {
5015 jvalue v;
5016 java_lang_boxing_object::get_value(obj, &v);
5017 return v.i;
5018 }
5019
5020 #define LONG_CACHE_FIELDS_DO(macro) \
5021 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5022
5023 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5024 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5025 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5026 }
5027
5028 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5029 oop base = ik->static_field_base_raw();
5030 return objArrayOop(base->obj_field(_static_cache_offset));
5031 }
5032
5033 Symbol* java_lang_Long_LongCache::symbol() {
5034 return vmSymbols::java_lang_Long_LongCache();
5035 }
5036
5037 #if INCLUDE_CDS
5038 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5039 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5040 }
5041 #endif
5042 #undef LONG_CACHE_FIELDS_DO
5043
5044 jlong java_lang_Long::value(oop obj) {
5045 jvalue v;
5046 java_lang_boxing_object::get_value(obj, &v);
5047 return v.j;
5048 }
5049
5050 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5051 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5052
5053 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5054 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5055 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5056 }
5057
5058 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5059 oop base = ik->static_field_base_raw();
5060 return objArrayOop(base->obj_field(_static_cache_offset));
5061 }
5062
5063 Symbol* java_lang_Character_CharacterCache::symbol() {
5064 return vmSymbols::java_lang_Character_CharacterCache();
5065 }
5066
5067 #if INCLUDE_CDS
5068 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5069 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5070 }
5071 #endif
5072 #undef CHARACTER_CACHE_FIELDS_DO
5073
5074 jchar java_lang_Character::value(oop obj) {
5075 jvalue v;
5076 java_lang_boxing_object::get_value(obj, &v);
5077 return v.c;
5078 }
5079
5080 #define SHORT_CACHE_FIELDS_DO(macro) \
5081 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5082
5083 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5084 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5085 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5086 }
5087
5088 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5089 oop base = ik->static_field_base_raw();
5090 return objArrayOop(base->obj_field(_static_cache_offset));
5091 }
5092
5093 Symbol* java_lang_Short_ShortCache::symbol() {
5094 return vmSymbols::java_lang_Short_ShortCache();
5095 }
5096
5097 #if INCLUDE_CDS
5098 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5099 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5100 }
5101 #endif
5102 #undef SHORT_CACHE_FIELDS_DO
5103
5104 jshort java_lang_Short::value(oop obj) {
5105 jvalue v;
5106 java_lang_boxing_object::get_value(obj, &v);
5107 return v.s;
5108 }
5109
5110 #define BYTE_CACHE_FIELDS_DO(macro) \
5111 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5112
5113 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5114 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5115 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5116 }
5117
5118 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5119 oop base = ik->static_field_base_raw();
5120 return objArrayOop(base->obj_field(_static_cache_offset));
5121 }
5122
5123 Symbol* java_lang_Byte_ByteCache::symbol() {
5124 return vmSymbols::java_lang_Byte_ByteCache();
5125 }
5126
5127 #if INCLUDE_CDS
5128 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5129 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5130 }
5131 #endif
5132 #undef BYTE_CACHE_FIELDS_DO
5133
5134 jbyte java_lang_Byte::value(oop obj) {
5135 jvalue v;
5136 java_lang_boxing_object::get_value(obj, &v);
5137 return v.b;
5138 }
5139
5140 int java_lang_Boolean::_static_TRUE_offset;
5141 int java_lang_Boolean::_static_FALSE_offset;
5142
5143 #define BOOLEAN_FIELDS_DO(macro) \
5144 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5145 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5146
5147
5148 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5149 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5150 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5151 }
5152
5153 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5154 oop base = ik->static_field_base_raw();
5155 return base->obj_field(_static_TRUE_offset);
5156 }
5157
5158 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5159 oop base = ik->static_field_base_raw();
5160 return base->obj_field(_static_FALSE_offset);
5161 }
5162
5163 Symbol* java_lang_Boolean::symbol() {
5164 return vmSymbols::java_lang_Boolean();
5165 }
5166
5167 #if INCLUDE_CDS
5168 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5169 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5170 }
5171 #endif
5172 #undef BOOLEAN_CACHE_FIELDS_DO
5173
5174 jboolean java_lang_Boolean::value(oop obj) {
5175 jvalue v;
5176 java_lang_boxing_object::get_value(obj, &v);
5177 return v.z;
5178 }
5179
5180 // java_lang_reflect_RecordComponent
5181
5182 int java_lang_reflect_RecordComponent::_clazz_offset;
5183 int java_lang_reflect_RecordComponent::_name_offset;
5184 int java_lang_reflect_RecordComponent::_type_offset;
5185 int java_lang_reflect_RecordComponent::_accessor_offset;
5186 int java_lang_reflect_RecordComponent::_signature_offset;
5187 int java_lang_reflect_RecordComponent::_annotations_offset;
5188 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5189
5190 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5191 macro(_clazz_offset, k, "clazz", class_signature, false); \
5192 macro(_name_offset, k, "name", string_signature, false); \
5193 macro(_type_offset, k, "type", class_signature, false); \
5194 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5195 macro(_signature_offset, k, "signature", string_signature, false); \
5196 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5197 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5198
5199 // Support for java_lang_reflect_RecordComponent
5200 void java_lang_reflect_RecordComponent::compute_offsets() {
5201 InstanceKlass* k = vmClasses::RecordComponent_klass();
5202 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5203 }
5204
5205 #if INCLUDE_CDS
5206 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5207 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5208 }
5209 #endif
5210
5211 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5212 element->obj_field_put(_clazz_offset, value);
5213 }
5214
5215 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5216 element->obj_field_put(_name_offset, value);
5217 }
5218
5219 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5220 element->obj_field_put(_type_offset, value);
5221 }
5222
5223 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5224 element->obj_field_put(_accessor_offset, value);
5225 }
5226
5227 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5228 element->obj_field_put(_signature_offset, value);
5229 }
5230
5231 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5232 element->obj_field_put(_annotations_offset, value);
5233 }
5234
5235 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5236 element->obj_field_put(_typeAnnotations_offset, value);
5237 }
5238
5239 // java_lang_InternalError
5240 int java_lang_InternalError::_during_unsafe_access_offset;
5241
5242 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5243 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5244 }
5245
5246 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5247 return internal_error->bool_field(_during_unsafe_access_offset);
5248 }
5249
5250 void java_lang_InternalError::compute_offsets() {
5251 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5252 }
5253
5254 #if INCLUDE_CDS
5255 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5256 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5257 }
5258 #endif
5259
5260 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5261 f(java_lang_Class) \
5262 f(java_lang_String) \
5263 f(java_lang_ref_Reference) \
5264 //end
5265
5266 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5267 f(java_lang_System) \
5268 f(java_lang_ClassLoader) \
5269 f(java_lang_Throwable) \
5270 f(java_lang_Thread) \
5271 f(java_lang_Thread_FieldHolder) \
5272 f(java_lang_Thread_Constants) \
5273 f(java_lang_ThreadGroup) \
5274 f(java_lang_VirtualThread) \
5275 f(java_lang_InternalError) \
5276 f(java_lang_AssertionStatusDirectives) \
5277 f(java_lang_ref_SoftReference) \
5278 f(java_lang_invoke_MethodHandle) \
5279 f(java_lang_invoke_DirectMethodHandle) \
5280 f(java_lang_invoke_MemberName) \
5281 f(java_lang_invoke_ResolvedMethodName) \
5282 f(java_lang_invoke_LambdaForm) \
5283 f(java_lang_invoke_MethodType) \
5284 f(java_lang_invoke_CallSite) \
5285 f(java_lang_invoke_ConstantCallSite) \
5286 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5287 f(java_security_AccessControlContext) \
5288 f(java_lang_reflect_AccessibleObject) \
5289 f(java_lang_reflect_Method) \
5290 f(java_lang_reflect_Constructor) \
5291 f(java_lang_reflect_Field) \
5292 f(java_lang_reflect_RecordComponent) \
5293 f(reflect_ConstantPool) \
5294 f(java_lang_reflect_Parameter) \
5295 f(java_lang_Module) \
5296 f(java_lang_StackTraceElement) \
5297 f(java_lang_ClassFrameInfo) \
5298 f(java_lang_StackFrameInfo) \
5299 f(java_lang_LiveStackFrameInfo) \
5300 f(jdk_internal_vm_ContinuationScope) \
5301 f(jdk_internal_vm_Continuation) \
5302 f(jdk_internal_vm_StackChunk) \
5303 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5304 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5305 f(jdk_internal_foreign_abi_ABIDescriptor) \
5306 f(jdk_internal_foreign_abi_VMStorage) \
5307 f(jdk_internal_foreign_abi_CallConv) \
5308 f(jdk_internal_misc_UnsafeConstants) \
5309 f(java_lang_boxing_object) \
5310 f(vector_VectorPayload) \
5311 //end
5312
5313 #define BASIC_JAVA_CLASSES_DO(f) \
5314 BASIC_JAVA_CLASSES_DO_PART1(f) \
5315 BASIC_JAVA_CLASSES_DO_PART2(f)
5316
5317 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5318
5319 // Compute field offsets of all the classes in this file
5320 void JavaClasses::compute_offsets() {
5321 if (UseSharedSpaces) {
5322 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5323 JvmtiExport::has_early_class_hook_env()),
5324 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5325 // None of the classes used by the rest of this function can be replaced by
5326 // JVMTI ClassFileLoadHook.
5327 // We are safe to use the archived offsets, which have already been restored
5328 // by JavaClasses::serialize_offsets, without computing the offsets again.
5329 return;
5330 }
5331
5332 // We have already called the compute_offsets() of the
5333 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5334 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5335 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5336 }
5337
5338 #if INCLUDE_CDS
5339 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5340
5341 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5342 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5343 }
5344 #endif
5345
5346 #if INCLUDE_CDS_JAVA_HEAP
5347 bool JavaClasses::is_supported_for_archiving(oop obj) {
5348 Klass* klass = obj->klass();
5349
5350 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed.
5351 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5352 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5353 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5354 // So for now we cannot not support these classes for archiving.
5355 //
5356 // These objects typically are not referenced by static fields, but rather by resolved
5357 // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5358 klass == vmClasses::ResolvedMethodName_klass() ||
5359 klass == vmClasses::MemberName_klass() ||
5360 klass == vmClasses::Context_klass() ||
5361 // It's problematic to archive Reference objects. One of the reasons is that
5362 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5363 klass->is_subclass_of(vmClasses::Reference_klass())) {
5364 return false;
5365 }
5366
5367 return true;
5368 }
5369 #endif
5370
5371 #ifndef PRODUCT
5372
5373 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5374
5375 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5376 const char* field_sig) {
5377 EXCEPTION_MARK;
5378 fieldDescriptor fd;
5379 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5380 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5381 InstanceKlass* ik = InstanceKlass::cast(k);
5382 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5383 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5384 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5385 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5386 return false;
5387 }
5388 if (fd.is_static()) {
5389 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5390 return false;
5391 }
5392 if (fd.offset() == deserialized_offset ) {
5393 return true;
5394 } else {
5395 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5396 klass_name, field_name, deserialized_offset, fd.offset());
5397 return false;
5398 }
5399 }
5400
5401 void JavaClasses::check_offsets() {
5402 bool valid = true;
5403
5404 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5405 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5406
5407 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5408 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5409
5410 // Boxed primitive objects (java_lang_boxing_object)
5411
5412 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5413 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5414 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5415 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5416 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5417 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5418 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5419 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5420
5421 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5422 }
5423
5424 #endif // PRODUCT
5425
5426 int InjectedField::compute_offset() {
5427 InstanceKlass* ik = InstanceKlass::cast(klass());
5428 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5429 if (!may_be_java && !fs.field_flags().is_injected()) {
5430 // Only look at injected fields
5431 continue;
5432 }
5433 if (fs.name() == name() && fs.signature() == signature()) {
5434 return fs.offset();
5435 }
5436 }
5437 ResourceMark rm;
5438 tty->print_cr("Invalid layout of %s at %s/%s%s", ik->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : "");
5439 #ifndef PRODUCT
5440 ik->print();
5441 tty->print_cr("all fields:");
5442 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5443 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5444 }
5445 #endif //PRODUCT
5446 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5447 return -1;
5448 }
5449
5450 void javaClasses_init() {
5451 JavaClasses::compute_offsets();
5452 JavaClasses::check_offsets();
5453 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5454 }