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/cdsConfig.hpp"
29 #include "cds/heapShared.hpp"
30 #include "cds/metaspaceShared.hpp"
31 #include "classfile/altHashing.hpp"
32 #include "classfile/classLoaderData.inline.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/javaClassesImpl.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "code/debugInfo.hpp"
43 #include "code/dependencyContext.hpp"
44 #include "code/pcDesc.hpp"
45 #include "gc/shared/collectedHeap.inline.hpp"
46 #include "interpreter/interpreter.hpp"
47 #include "interpreter/linkResolver.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/oopFactory.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/fieldInfo.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/instanceKlass.inline.hpp"
57 #include "oops/instanceMirrorKlass.hpp"
58 #include "oops/klass.hpp"
59 #include "oops/klass.inline.hpp"
60 #include "oops/method.inline.hpp"
61 #include "oops/objArrayKlass.hpp"
62 #include "oops/objArrayOop.inline.hpp"
63 #include "oops/oopCast.inline.hpp"
64 #include "oops/oop.inline.hpp"
65 #include "oops/symbol.hpp"
66 #include "oops/recordComponent.hpp"
67 #include "oops/typeArrayOop.inline.hpp"
68 #include "prims/jvmtiExport.hpp"
69 #include "prims/methodHandles.hpp"
70 #include "prims/resolvedMethodTable.hpp"
71 #include "runtime/continuationEntry.inline.hpp"
72 #include "runtime/continuationJavaClasses.inline.hpp"
73 #include "runtime/fieldDescriptor.inline.hpp"
74 #include "runtime/frame.inline.hpp"
75 #include "runtime/handles.inline.hpp"
76 #include "runtime/handshake.hpp"
77 #include "runtime/init.hpp"
78 #include "runtime/interfaceSupport.inline.hpp"
79 #include "runtime/java.hpp"
80 #include "runtime/javaCalls.hpp"
81 #include "runtime/javaThread.hpp"
82 #include "runtime/jniHandles.inline.hpp"
83 #include "runtime/reflectionUtils.hpp"
84 #include "runtime/safepoint.hpp"
85 #include "runtime/safepointVerifiers.hpp"
86 #include "runtime/threadSMR.hpp"
87 #include "runtime/vframe.inline.hpp"
88 #include "runtime/vm_version.hpp"
89 #include "utilities/align.hpp"
90 #include "utilities/globalDefinitions.hpp"
91 #include "utilities/growableArray.hpp"
92 #include "utilities/preserveException.hpp"
93 #include "utilities/utf8.hpp"
94 #if INCLUDE_JVMCI
95 #include "jvmci/jvmciJavaClasses.hpp"
96 #endif
97
98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
100
101 InjectedField JavaClasses::_injected_fields[] = {
102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
103 };
104
105 // Register native methods of Object
106 void java_lang_Object::register_natives(TRAPS) {
107 InstanceKlass* obj = vmClasses::Object_klass();
108 Method::register_native(obj, vmSymbols::hashCode_name(),
109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
110 Method::register_native(obj, vmSymbols::wait_name(),
111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
112 Method::register_native(obj, vmSymbols::notify_name(),
113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
114 Method::register_native(obj, vmSymbols::notifyAll_name(),
115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
116 Method::register_native(obj, vmSymbols::clone_name(),
117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
118 }
119
120 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
121 return _injected_fields[(int)id].compute_offset();
122 }
123
124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
125 *field_count = 0;
126
127 vmSymbolID sid = vmSymbols::find_sid(class_name);
128 if (sid == vmSymbolID::NO_SID) {
129 // Only well known classes can inject fields
130 return nullptr;
131 }
132
133 int count = 0;
134 int start = -1;
135
136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
138 count++; \
139 if (start == -1) { \
140 start = (int)InjectedFieldID::klass##_##name##_enum; \
141 } \
142 }
143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
144 #undef LOOKUP_INJECTED_FIELD
145
146 if (start != -1) {
147 *field_count = count;
148 return _injected_fields + start;
149 }
150 return nullptr;
151 }
152
153
154 // Helpful routine for computing field offsets at run time rather than hardcoding them
155 // Finds local fields only, including static fields. Static field offsets are from the
156 // beginning of the mirror.
157 void JavaClasses::compute_offset(int &dest_offset,
158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
159 bool is_static) {
160 fieldDescriptor fd;
161 if (ik == nullptr) {
162 ResourceMark rm;
163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
164 vm_exit_during_initialization("Invalid layout of well-known class");
165 }
166
167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
168 ResourceMark rm;
169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
170 name_symbol->as_C_string(), signature_symbol->as_C_string());
171 #ifndef PRODUCT
172 // Prints all fields and offsets
173 Log(class) lt;
174 LogStream ls(lt.error());
175 ik->print_on(&ls);
176 #endif //PRODUCT
177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
178 }
179 dest_offset = fd.offset();
180 }
181
182 // Overloading to pass name as a string.
183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
184 const char* name_string, Symbol* signature_symbol,
185 bool is_static) {
186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
187 if (name == nullptr) {
188 ResourceMark rm;
189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
191 }
192 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
193 }
194
195 // java_lang_String
196
197 int java_lang_String::_value_offset;
198 int java_lang_String::_hash_offset;
199 int java_lang_String::_hashIsZero_offset;
200 int java_lang_String::_coder_offset;
201 int java_lang_String::_flags_offset;
202
203 bool java_lang_String::_initialized;
204
205
206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
207 uint8_t* addr = flags_addr(java_string);
208 uint8_t value = Atomic::load(addr);
209 while ((value & flag_mask) == 0) {
210 uint8_t old_value = value;
211 value |= flag_mask;
212 value = Atomic::cmpxchg(addr, old_value, value);
213 if (value == old_value) return false; // Flag bit changed from 0 to 1.
214 }
215 return true; // Flag bit is already 1.
216 }
217
218 #define STRING_FIELDS_DO(macro) \
219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
220 macro(_hash_offset, k, "hash", int_signature, false); \
221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
222 macro(_coder_offset, k, "coder", byte_signature, false);
223
224 void java_lang_String::compute_offsets() {
225 if (_initialized) {
226 return;
227 }
228
229 InstanceKlass* k = vmClasses::String_klass();
230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
232
233 _initialized = true;
234 }
235
236 #if INCLUDE_CDS
237 void java_lang_String::serialize_offsets(SerializeClosure* f) {
238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
240 f->do_bool(&_initialized);
241 }
242 #endif
243
244 class CompactStringsFixup : public FieldClosure {
245 private:
246 bool _value;
247
248 public:
249 CompactStringsFixup(bool value) : _value(value) {}
250
251 void do_field(fieldDescriptor* fd) {
252 if (fd->name() == vmSymbols::compact_strings_name()) {
253 oop mirror = fd->field_holder()->java_mirror();
254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
255 assert(mirror != nullptr, "String must have mirror already");
256 mirror->bool_field_put(fd->offset(), _value);
257 }
258 }
259 };
260
261 void java_lang_String::set_compact_strings(bool value) {
262 CompactStringsFixup fix(value);
263 vmClasses::String_klass()->do_local_static_fields(&fix);
264 }
265
266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
267 assert(_initialized, "Must be initialized");
268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
269
270 // Create the String object first, so there's a chance that the String
271 // and the char array it points to end up in the same cache line.
272 oop obj;
273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
274
275 // Create the char array. The String object must be handlized here
276 // because GC can happen as a result of the allocation attempt.
277 Handle h_obj(THREAD, obj);
278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
280
281 // Point the String at the char array
282 obj = h_obj();
283 set_value(obj, buffer);
284 // No need to zero the offset, allocation zero'ed the entire String object
285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
286 return h_obj;
287 }
288
289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
292 typeArrayOop buffer = value(h_obj());
293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
294 if (is_latin1) {
295 for (int index = 0; index < length; index++) {
296 buffer->byte_at_put(index, (jbyte)unicode[index]);
297 }
298 } else {
299 for (int index = 0; index < length; index++) {
300 buffer->char_at_put(index, unicode[index]);
301 }
302 }
303
304 #ifdef ASSERT
305 {
306 ResourceMark rm;
307 char* expected = UNICODE::as_utf8(unicode, length);
308 char* actual = as_utf8_string(h_obj());
309 if (strcmp(expected, actual) != 0) {
310 fatal("Unicode conversion failure: %s --> %s", expected, actual);
311 }
312 }
313 #endif
314
315 return h_obj;
316 }
317
318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
319 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
320 return h_obj();
321 }
322
323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
324 if (utf8_str == nullptr) {
325 return Handle();
326 }
327 bool has_multibyte, is_latin1;
328 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
329 if (!CompactStrings) {
330 has_multibyte = true;
331 is_latin1 = false;
332 }
333
334 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
335 if (length > 0) {
336 if (!has_multibyte) {
337 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
338 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
339 } else if (is_latin1) {
340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
341 } else {
342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
343 }
344 }
345
346 #ifdef ASSERT
347 // This check is too strict when the input string is not a valid UTF8.
348 // For example, it may be created with arbitrary content via jni_NewStringUTF.
349 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) {
350 ResourceMark rm;
351 const char* expected = utf8_str;
352 char* actual = as_utf8_string(h_obj());
353 if (strcmp(expected, actual) != 0) {
354 fatal("String conversion failure: %s --> %s", expected, actual);
355 }
356 }
357 #endif
358
359 return h_obj;
360 }
361
362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
363 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
364 return h_obj();
365 }
366
367 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
368 const char* utf8_str = (char*)symbol->bytes();
369 int utf8_len = symbol->utf8_length();
370
371 bool has_multibyte, is_latin1;
372 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
373 if (!CompactStrings) {
374 has_multibyte = true;
375 is_latin1 = false;
376 }
377
378 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
379 if (length > 0) {
380 if (!has_multibyte) {
381 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
382 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
383 } else if (is_latin1) {
384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
385 } else {
386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
387 }
388 }
389
390 #ifdef ASSERT
391 {
392 ResourceMark rm;
393 const char* expected = symbol->as_utf8();
394 char* actual = as_utf8_string(h_obj());
395 if (strncmp(expected, actual, utf8_len) != 0) {
396 fatal("Symbol conversion failure: %s --> %s", expected, actual);
397 }
398 }
399 #endif
400
401 return h_obj;
402 }
403
404 // Converts a C string to a Java String based on current encoding
405 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
406 assert(str != nullptr, "bad arguments");
407
408 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
409 static to_java_string_fn_t _to_java_string_fn = nullptr;
410
411 if (_to_java_string_fn == nullptr) {
412 void *lib_handle = os::native_java_library();
413 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
414 #if defined(_WIN32) && !defined(_WIN64)
415 if (_to_java_string_fn == nullptr) {
416 // On 32 bit Windows, also try __stdcall decorated name
417 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
418 }
419 #endif
420 if (_to_java_string_fn == nullptr) {
421 fatal("JNU_NewStringPlatform missing");
422 }
423 }
424
425 jstring js = nullptr;
426 {
427 JavaThread* thread = THREAD;
428 HandleMark hm(thread);
429 ThreadToNativeFromVM ttn(thread);
430 js = (_to_java_string_fn)(thread->jni_environment(), str);
431 }
432
433 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
434 JNIHandles::destroy_local(js); // destroy local JNIHandle.
435 return native_platform_string;
436 }
437
438 // Converts a Java String to a native C string that can be used for
439 // native OS calls.
440 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
441 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
442 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
443
444 if (_to_platform_string_fn == nullptr) {
445 void *lib_handle = os::native_java_library();
446 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
447 if (_to_platform_string_fn == nullptr) {
448 fatal("GetStringPlatformChars missing");
449 }
450 }
451
452 char *native_platform_string;
453 jstring js;
454 { JavaThread* thread = THREAD;
455 js = (jstring) JNIHandles::make_local(thread, java_string());
456 HandleMark hm(thread);
457 ThreadToNativeFromVM ttn(thread);
458 JNIEnv *env = thread->jni_environment();
459 bool is_copy;
460 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
461 assert(is_copy == JNI_TRUE, "is_copy value changed");
462 }
463
464 // Uses a store barrier and therefore needs to be in vm state
465 JNIHandles::destroy_local(js);
466
467 return native_platform_string;
468 }
469
470 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
471 ResourceMark rm(THREAD);
472 return create_from_str(java_name->as_klass_external_name(), THREAD);
473 }
474
475 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
476 jchar* result = as_unicode_string_or_null(java_string, length);
477 if (result == nullptr) {
478 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
479 }
480 return result;
481 }
482
483 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
484 typeArrayOop value = java_lang_String::value(java_string);
485 length = java_lang_String::length(java_string, value);
486 bool is_latin1 = java_lang_String::is_latin1(java_string);
487
488 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
489 if (result != nullptr) {
490 if (!is_latin1) {
491 for (int index = 0; index < length; index++) {
492 result[index] = value->char_at(index);
493 }
494 } else {
495 for (int index = 0; index < length; index++) {
496 result[index] = ((jchar) value->byte_at(index)) & 0xff;
497 }
498 }
499 }
500 return result;
501 }
502
503 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
504 // The hash and hashIsZero fields are subject to a benign data race,
505 // making it crucial to ensure that any observable result of the
506 // calculation in this method stays correct under any possible read of
507 // these fields. Necessary restrictions to allow this to be correct
508 // without explicit memory fences or similar concurrency primitives is
509 // that we can ever only write to one of these two fields for a given
510 // String instance, and that the computation is idempotent and derived
511 // from immutable state
512 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
513 if (java_lang_String::hash_is_set(java_string)) {
514 return java_string->int_field(_hash_offset);
515 }
516
517 typeArrayOop value = java_lang_String::value(java_string);
518 int length = java_lang_String::length(java_string, value);
519 bool is_latin1 = java_lang_String::is_latin1(java_string);
520
521 unsigned int hash = 0;
522 if (length > 0) {
523 if (is_latin1) {
524 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
525 } else {
526 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
527 }
528 }
529
530 if (update) {
531 if (hash != 0) {
532 java_string->int_field_put(_hash_offset, hash);
533 } else {
534 java_string->bool_field_put(_hashIsZero_offset, true);
535 }
536 }
537 return hash;
538 }
539
540 unsigned int java_lang_String::hash_code(oop java_string) {
541 return hash_code_impl(java_string, /*update=*/true);
542 }
543
544 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
545 return hash_code_impl(java_string, /*update=*/false);
546 }
547
548
549 char* java_lang_String::as_quoted_ascii(oop java_string) {
550 typeArrayOop value = java_lang_String::value(java_string);
551 int length = java_lang_String::length(java_string, value);
552 bool is_latin1 = java_lang_String::is_latin1(java_string);
553
554 if (length == 0) return nullptr;
555
556 char* result;
557 int result_length;
558 if (!is_latin1) {
559 jchar* base = value->char_at_addr(0);
560 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
561 result = NEW_RESOURCE_ARRAY(char, result_length);
562 UNICODE::as_quoted_ascii(base, length, result, result_length);
563 } else {
564 jbyte* base = value->byte_at_addr(0);
565 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
566 result = NEW_RESOURCE_ARRAY(char, result_length);
567 UNICODE::as_quoted_ascii(base, length, result, result_length);
568 }
569 assert(result_length >= length + 1, "must not be shorter");
570 assert(result_length == (int)strlen(result) + 1, "must match");
571 return result;
572 }
573
574 Symbol* java_lang_String::as_symbol(oop java_string) {
575 typeArrayOop value = java_lang_String::value(java_string);
576 int length = java_lang_String::length(java_string, value);
577 bool is_latin1 = java_lang_String::is_latin1(java_string);
578 if (!is_latin1) {
579 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
580 Symbol* sym = SymbolTable::new_symbol(base, length);
581 return sym;
582 } else {
583 ResourceMark rm;
584 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
585 const char* base = UNICODE::as_utf8(position, length);
586 Symbol* sym = SymbolTable::new_symbol(base, length);
587 return sym;
588 }
589 }
590
591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
592 typeArrayOop value = java_lang_String::value(java_string);
593 int length = java_lang_String::length(java_string, value);
594 bool is_latin1 = java_lang_String::is_latin1(java_string);
595 if (!is_latin1) {
596 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
597 return SymbolTable::probe_unicode(base, length);
598 } else {
599 ResourceMark rm;
600 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
601 const char* base = UNICODE::as_utf8(position, length);
602 return SymbolTable::probe(base, length);
603 }
604 }
605
606 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
607 assert(value_equals(value, java_lang_String::value(java_string)),
608 "value must be same as java_lang_String::value(java_string)");
609 int length = java_lang_String::length(java_string, value);
610 if (length == 0) {
611 return 0;
612 }
613 if (!java_lang_String::is_latin1(java_string)) {
614 return UNICODE::utf8_length(value->char_at_addr(0), length);
615 } else {
616 return UNICODE::utf8_length(value->byte_at_addr(0), length);
617 }
618 }
619
620 int java_lang_String::utf8_length(oop java_string) {
621 typeArrayOop value = java_lang_String::value(java_string);
622 return utf8_length(java_string, value);
623 }
624
625 char* java_lang_String::as_utf8_string(oop java_string) {
626 int length;
627 return as_utf8_string(java_string, length);
628 }
629
630 char* java_lang_String::as_utf8_string(oop java_string, int& length) {
631 typeArrayOop value = java_lang_String::value(java_string);
632 length = java_lang_String::length(java_string, value);
633 bool is_latin1 = java_lang_String::is_latin1(java_string);
634 if (!is_latin1) {
635 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
636 return UNICODE::as_utf8(position, length);
637 } else {
638 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
639 return UNICODE::as_utf8(position, length);
640 }
641 }
642
643 // Uses a provided buffer if it's sufficiently large, otherwise allocates
644 // a resource array to fit
645 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) {
646 typeArrayOop value = java_lang_String::value(java_string);
647 int len = java_lang_String::length(java_string, value);
648 bool is_latin1 = java_lang_String::is_latin1(java_string);
649 if (!is_latin1) {
650 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
651 utf8_len = UNICODE::utf8_length(position, len);
652 if (utf8_len >= buflen) {
653 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
654 }
655 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
656 } else {
657 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
658 utf8_len = UNICODE::utf8_length(position, len);
659 if (utf8_len >= buflen) {
660 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
661 }
662 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
663 }
664 }
665
666 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
667 assert(value_equals(value, java_lang_String::value(java_string)),
668 "value must be same as java_lang_String::value(java_string)");
669 int length = java_lang_String::length(java_string, value);
670 bool is_latin1 = java_lang_String::is_latin1(java_string);
671 if (!is_latin1) {
672 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
673 return UNICODE::as_utf8(position, length, buf, buflen);
674 } else {
675 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
676 return UNICODE::as_utf8(position, length, buf, buflen);
677 }
678 }
679
680 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
681 typeArrayOop value = java_lang_String::value(java_string);
682 return as_utf8_string(java_string, value, buf, buflen);
683 }
684
685 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
686 typeArrayOop value = java_lang_String::value(java_string);
687 bool is_latin1 = java_lang_String::is_latin1(java_string);
688 assert(start + len <= java_lang_String::length(java_string), "just checking");
689 if (!is_latin1) {
690 jchar* position = value->char_at_addr(start);
691 return UNICODE::as_utf8(position, len);
692 } else {
693 jbyte* position = value->byte_at_addr(start);
694 return UNICODE::as_utf8(position, len);
695 }
696 }
697
698 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
699 assert(value_equals(value, java_lang_String::value(java_string)),
700 "value must be same as java_lang_String::value(java_string)");
701 assert(start + len <= java_lang_String::length(java_string), "just checking");
702 bool is_latin1 = java_lang_String::is_latin1(java_string);
703 if (!is_latin1) {
704 jchar* position = value->char_at_addr(start);
705 return UNICODE::as_utf8(position, len, buf, buflen);
706 } else {
707 jbyte* position = value->byte_at_addr(start);
708 return UNICODE::as_utf8(position, len, buf, buflen);
709 }
710 }
711
712 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
713 assert(java_string->klass() == vmClasses::String_klass(),
714 "must be java_string");
715 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
716 int length = java_lang_String::length(java_string, value);
717 if (length != len) {
718 return false;
719 }
720 bool is_latin1 = java_lang_String::is_latin1(java_string);
721 if (!is_latin1) {
722 for (int i = 0; i < len; i++) {
723 if (value->char_at(i) != chars[i]) {
724 return false;
725 }
726 }
727 } else {
728 for (int i = 0; i < len; i++) {
729 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
730 return false;
731 }
732 }
733 }
734 return true;
735 }
736
737 bool java_lang_String::equals(oop str1, oop str2) {
738 assert(str1->klass() == vmClasses::String_klass(),
739 "must be java String");
740 assert(str2->klass() == vmClasses::String_klass(),
741 "must be java String");
742 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
743 bool is_latin1 = java_lang_String::is_latin1(str1);
744 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
745 bool is_latin2 = java_lang_String::is_latin1(str2);
746
747 if (is_latin1 != is_latin2) {
748 // Strings with different coders are never equal.
749 return false;
750 }
751 return value_equals(value1, value2);
752 }
753
754 void java_lang_String::print(oop java_string, outputStream* st) {
755 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
756 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
757
758 if (value == nullptr) {
759 // This can happen if, e.g., printing a String
760 // object before its initializer has been called
761 st->print("nullptr");
762 return;
763 }
764
765 int length = java_lang_String::length(java_string, value);
766 bool is_latin1 = java_lang_String::is_latin1(java_string);
767
768 st->print("\"");
769 for (int index = 0; index < length; index++) {
770 jchar c = (!is_latin1) ? value->char_at(index) :
771 ((jchar) value->byte_at(index)) & 0xff;
772 if (c < ' ') {
773 st->print("\\x%02X", c); // print control characters e.g. \x0A
774 } else {
775 st->print("%c", c);
776 }
777 }
778 st->print("\"");
779 }
780
781 // java_lang_Class
782
783 int java_lang_Class::_klass_offset;
784 int java_lang_Class::_array_klass_offset;
785 int java_lang_Class::_oop_size_offset;
786 int java_lang_Class::_static_oop_field_count_offset;
787 int java_lang_Class::_class_loader_offset;
788 int java_lang_Class::_module_offset;
789 int java_lang_Class::_protection_domain_offset;
790 int java_lang_Class::_component_mirror_offset;
791 int java_lang_Class::_signers_offset;
792 int java_lang_Class::_name_offset;
793 int java_lang_Class::_source_file_offset;
794 int java_lang_Class::_classData_offset;
795 int java_lang_Class::_classRedefinedCount_offset;
796
797 bool java_lang_Class::_offsets_computed = false;
798 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
799 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
800
801 #ifdef ASSERT
802 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
803 assert(fd->has_initial_value(), "caller should have checked this");
804 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
805 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
806 }
807 #endif
808
809 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
810 DEBUG_ONLY(assert_valid_static_string_field(fd);)
811 oop string = fd->string_initial_value(CHECK);
812 mirror()->obj_field_put(fd->offset(), string);
813 }
814
815 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
816 assert(fd->has_initial_value(), "caller should have checked this");
817 BasicType t = fd->field_type();
818 switch (t) {
819 case T_BYTE:
820 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
821 break;
822 case T_BOOLEAN:
823 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
824 break;
825 case T_CHAR:
826 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
827 break;
828 case T_SHORT:
829 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
830 break;
831 case T_INT:
832 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
833 break;
834 case T_FLOAT:
835 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
836 break;
837 case T_DOUBLE:
838 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
839 break;
840 case T_LONG:
841 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
842 break;
843 default:
844 // Illegal ConstantValue attribute in class file should have been
845 // caught during classfile parsing.
846 ShouldNotReachHere();
847 }
848 }
849
850 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
851 assert(mirror.not_null() && fd->is_static(), "just checking");
852 if (fd->has_initial_value()) {
853 if (fd->field_type() != T_OBJECT) {
854 initialize_static_primitive_field(fd, mirror);
855 } else {
856 initialize_static_string_field(fd, mirror, CHECK);
857 }
858 }
859 }
860
861 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
862 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
863
864 // If the offset was read from the shared archive, it was fixed up already
865 if (!k->is_shared()) {
866 if (k->is_instance_klass()) {
867 // During bootstrap, java.lang.Class wasn't loaded so static field
868 // offsets were computed without the size added it. Go back and
869 // update all the static field offsets to included the size.
870
871 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
872 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
873 // static fields offsets are updated in this array before reencoding everything into
874 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
875
876 int java_fields;
877 int injected_fields;
878 InstanceKlass* ik = InstanceKlass::cast(k);
879 GrowableArray<FieldInfo>* fields =
880 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
881 &java_fields, &injected_fields);
882 for (int i = 0; i < fields->length(); i++) {
883 FieldInfo* fi = fields->adr_at(i);
884 if (fi->access_flags().is_static()) {
885 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
886 }
887 }
888 Array<u1>* old_stream = ik->fieldinfo_stream();
889 assert(fields->length() == (java_fields + injected_fields), "Must be");
890 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
891 ik->set_fieldinfo_stream(new_fis);
892 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
893 }
894 }
895
896 if (k->is_shared() && k->has_archived_mirror_index()) {
897 if (ArchiveHeapLoader::is_in_use()) {
898 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
899 assert(present, "Missing archived mirror for %s", k->external_name());
900 return;
901 } else {
902 k->clear_java_mirror_handle();
903 k->clear_archived_mirror_index();
904 }
905 }
906 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
907 }
908
909 void java_lang_Class::initialize_mirror_fields(Klass* k,
910 Handle mirror,
911 Handle protection_domain,
912 Handle classData,
913 TRAPS) {
914 // Set protection domain also
915 set_protection_domain(mirror(), protection_domain());
916
917 // Initialize static fields
918 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
919
920 // Set classData
921 set_class_data(mirror(), classData());
922 }
923
924 // Set the java.lang.Module module field in the java_lang_Class mirror
925 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
926 if (module.is_null()) {
927 // During startup, the module may be null only if java.base has not been defined yet.
928 // Put the class on the fixup_module_list to patch later when the java.lang.Module
929 // for java.base is known. But note that since we captured the null module another
930 // thread may have completed that initialization.
931
932 bool javabase_was_defined = false;
933 {
934 MutexLocker m1(current, Module_lock);
935 // Keep list of classes needing java.base module fixup
936 if (!ModuleEntryTable::javabase_defined()) {
937 assert(k->java_mirror() != nullptr, "Class's mirror is null");
938 k->class_loader_data()->inc_keep_alive();
939 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
940 fixup_module_field_list()->push(k);
941 } else {
942 javabase_was_defined = true;
943 }
944 }
945
946 // If java.base was already defined then patch this particular class with java.base.
947 if (javabase_was_defined) {
948 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
949 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
950 "Setting class module field, " JAVA_BASE_NAME " should be defined");
951 Handle javabase_handle(current, javabase_entry->module());
952 set_module(mirror(), javabase_handle());
953 }
954 } else {
955 assert(Universe::is_module_initialized() ||
956 (ModuleEntryTable::javabase_defined() &&
957 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
958 "Incorrect java.lang.Module specification while creating mirror");
959 set_module(mirror(), module());
960 }
961 }
962
963 // Statically allocate fixup lists because they always get created.
964 void java_lang_Class::allocate_fixup_lists() {
965 GrowableArray<Klass*>* mirror_list =
966 new (mtClass) GrowableArray<Klass*>(40, mtClass);
967 set_fixup_mirror_list(mirror_list);
968
969 GrowableArray<Klass*>* module_list =
970 new (mtModule) GrowableArray<Klass*>(500, mtModule);
971 set_fixup_module_field_list(module_list);
972 }
973
974 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
975 Handle& mirror, Handle& comp_mirror, TRAPS) {
976 // Allocate mirror (java.lang.Class instance)
977 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
978 mirror = Handle(THREAD, mirror_oop);
979
980 // Setup indirection from mirror->klass
981 set_klass(mirror(), k);
982
983 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
984 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
985
986 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
987
988 // It might also have a component mirror. This mirror must already exist.
989 if (k->is_array_klass()) {
990 if (k->is_typeArray_klass()) {
991 BasicType type = TypeArrayKlass::cast(k)->element_type();
992 if (is_scratch) {
993 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
994 } else {
995 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
996 }
997 } else {
998 assert(k->is_objArray_klass(), "Must be");
999 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1000 assert(element_klass != nullptr, "Must have an element klass");
1001 if (is_scratch) {
1002 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1003 } else {
1004 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1005 }
1006 }
1007 assert(comp_mirror() != nullptr, "must have a mirror");
1008
1009 // Two-way link between the array klass and its component mirror:
1010 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1011 set_component_mirror(mirror(), comp_mirror());
1012 // See below for ordering dependencies between field array_klass in component mirror
1013 // and java_mirror in this klass.
1014 } else {
1015 assert(k->is_instance_klass(), "Must be");
1016
1017 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1018 if (HAS_PENDING_EXCEPTION) {
1019 // If any of the fields throws an exception like OOM remove the klass field
1020 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1021 // This mirror looks like a primitive type, which logically it is because it
1022 // it represents no class.
1023 set_klass(mirror(), nullptr);
1024 return;
1025 }
1026 }
1027 }
1028
1029 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1030 Handle module, Handle protection_domain,
1031 Handle classData, TRAPS) {
1032 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1033 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1034
1035 // Use this moment of initialization to cache modifier_flags also,
1036 // to support Class.getModifiers(). Instance classes recalculate
1037 // the cached flags after the class file is parsed, but before the
1038 // class is put into the system dictionary.
1039 int computed_modifiers = k->compute_modifier_flags();
1040 k->set_modifier_flags(computed_modifiers);
1041 // Class_klass has to be loaded because it is used to allocate
1042 // the mirror.
1043 if (vmClasses::Class_klass_loaded()) {
1044 Handle mirror;
1045 Handle comp_mirror;
1046
1047 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1048
1049 // set the classLoader field in the java_lang_Class instance
1050 assert(class_loader() == k->class_loader(), "should be same");
1051 set_class_loader(mirror(), class_loader());
1052
1053 // Setup indirection from klass->mirror
1054 // after any exceptions can happen during allocations.
1055 k->set_java_mirror(mirror);
1056
1057 // Set the module field in the java_lang_Class instance. This must be done
1058 // after the mirror is set.
1059 set_mirror_module_field(THREAD, k, mirror, module);
1060
1061 if (comp_mirror() != nullptr) {
1062 // Set after k->java_mirror() is published, because compiled code running
1063 // concurrently doesn't expect a k to have a null java_mirror.
1064 release_set_array_klass(comp_mirror(), k);
1065 }
1066 if (CDSConfig::is_dumping_heap()) {
1067 create_scratch_mirror(k, CHECK);
1068 }
1069 } else {
1070 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1071 fixup_mirror_list()->push(k);
1072 }
1073 }
1074
1075 #if INCLUDE_CDS_JAVA_HEAP
1076 // The "scratch mirror" stores the states of the mirror object that can be
1077 // decided at dump time (such as the initial values of the static fields, the
1078 // component mirror, etc). At runtime, more information is added to it by
1079 // java_lang_Class::restore_archived_mirror().
1080 //
1081 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1082 // produces the same result as /*runtime*/create_mirror().
1083 //
1084 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1085 // latter may contain dumptime-specific information that cannot be archived
1086 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1087 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1088 if (k->class_loader() != nullptr &&
1089 k->class_loader() != SystemDictionary::java_platform_loader() &&
1090 k->class_loader() != SystemDictionary::java_system_loader()) {
1091 // We only archive the mirrors of classes loaded by the built-in loaders
1092 return;
1093 }
1094
1095 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1096 Handle mirror;
1097 Handle comp_mirror;
1098 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1099
1100 if (comp_mirror() != nullptr) {
1101 release_set_array_klass(comp_mirror(), k);
1102 }
1103
1104 HeapShared::set_scratch_java_mirror(k, mirror());
1105 }
1106
1107 // Returns true if the mirror is updated, false if no archived mirror
1108 // data is present. After the archived mirror object is restored, the
1109 // shared klass' _has_raw_archived_mirror flag is cleared.
1110 bool java_lang_Class::restore_archived_mirror(Klass *k,
1111 Handle class_loader, Handle module,
1112 Handle protection_domain, TRAPS) {
1113 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1114 // see more details in vmClasses::resolve_all().
1115 if (!vmClasses::Class_klass_loaded()) {
1116 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1117 fixup_mirror_list()->push(k);
1118 return true;
1119 }
1120
1121 oop m = k->archived_java_mirror();
1122 assert(m != nullptr, "must have stored non-null archived mirror");
1123
1124 // Sanity: clear it now to prevent re-initialization if any of the following fails
1125 k->clear_archived_mirror_index();
1126
1127 // mirror is archived, restore
1128 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1129 assert(as_Klass(m) == k, "must be");
1130 Handle mirror(THREAD, m);
1131
1132 if (!k->is_array_klass()) {
1133 // - local static final fields with initial values were initialized at dump time
1134
1135 if (protection_domain.not_null()) {
1136 set_protection_domain(mirror(), protection_domain());
1137 }
1138 }
1139
1140 assert(class_loader() == k->class_loader(), "should be same");
1141 if (class_loader.not_null()) {
1142 set_class_loader(mirror(), class_loader());
1143 }
1144
1145 k->set_java_mirror(mirror);
1146
1147 set_mirror_module_field(THREAD, k, mirror, module);
1148
1149 if (log_is_enabled(Trace, cds, heap, mirror)) {
1150 ResourceMark rm(THREAD);
1151 log_trace(cds, heap, mirror)(
1152 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1153 }
1154
1155 return true;
1156 }
1157 #endif // INCLUDE_CDS_JAVA_HEAP
1158
1159 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1160 assert(_module_offset != 0, "must have been computed already");
1161 set_module(k->java_mirror(), module());
1162 }
1163
1164 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1165 assert(_oop_size_offset != 0, "must be set");
1166 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1167 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1168 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1169 }
1170
1171 int java_lang_Class::static_oop_field_count(oop java_class) {
1172 assert(_static_oop_field_count_offset != 0, "must be set");
1173 return java_class->int_field(_static_oop_field_count_offset);
1174 }
1175
1176 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1177 assert(_static_oop_field_count_offset != 0, "must be set");
1178 java_class->int_field_put(_static_oop_field_count_offset, size);
1179 }
1180
1181 oop java_lang_Class::protection_domain(oop java_class) {
1182 assert(_protection_domain_offset != 0, "must be set");
1183 return java_class->obj_field(_protection_domain_offset);
1184 }
1185 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1186 assert(_protection_domain_offset != 0, "must be set");
1187 java_class->obj_field_put(_protection_domain_offset, pd);
1188 }
1189
1190 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1191 assert(_component_mirror_offset != 0, "must be set");
1192 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1193 }
1194 oop java_lang_Class::component_mirror(oop java_class) {
1195 assert(_component_mirror_offset != 0, "must be set");
1196 return java_class->obj_field(_component_mirror_offset);
1197 }
1198
1199 objArrayOop java_lang_Class::signers(oop java_class) {
1200 assert(_signers_offset != 0, "must be set");
1201 return (objArrayOop)java_class->obj_field(_signers_offset);
1202 }
1203 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1204 assert(_signers_offset != 0, "must be set");
1205 java_class->obj_field_put(_signers_offset, signers);
1206 }
1207
1208 oop java_lang_Class::class_data(oop java_class) {
1209 assert(_classData_offset != 0, "must be set");
1210 return java_class->obj_field(_classData_offset);
1211 }
1212 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1213 assert(_classData_offset != 0, "must be set");
1214 java_class->obj_field_put(_classData_offset, class_data);
1215 }
1216
1217 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1218 assert(_class_loader_offset != 0, "offsets should have been initialized");
1219 java_class->obj_field_put(_class_loader_offset, loader);
1220 }
1221
1222 oop java_lang_Class::class_loader(oop java_class) {
1223 assert(_class_loader_offset != 0, "must be set");
1224 return java_class->obj_field(_class_loader_offset);
1225 }
1226
1227 oop java_lang_Class::module(oop java_class) {
1228 assert(_module_offset != 0, "must be set");
1229 return java_class->obj_field(_module_offset);
1230 }
1231
1232 void java_lang_Class::set_module(oop java_class, oop module) {
1233 assert(_module_offset != 0, "must be set");
1234 java_class->obj_field_put(_module_offset, module);
1235 }
1236
1237 oop java_lang_Class::name(Handle java_class, TRAPS) {
1238 assert(_name_offset != 0, "must be set");
1239 oop o = java_class->obj_field(_name_offset);
1240 if (o == nullptr) {
1241 o = StringTable::intern(as_external_name(java_class()), THREAD);
1242 java_class->obj_field_put(_name_offset, o);
1243 }
1244 return o;
1245 }
1246
1247 oop java_lang_Class::source_file(oop java_class) {
1248 assert(_source_file_offset != 0, "must be set");
1249 return java_class->obj_field(_source_file_offset);
1250 }
1251
1252 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1253 assert(_source_file_offset != 0, "must be set");
1254 java_class->obj_field_put(_source_file_offset, source_file);
1255 }
1256
1257 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1258 // This should be improved by adding a field at the Java level or by
1259 // introducing a new VM klass (see comment in ClassFileParser)
1260 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1261 if (type != T_VOID) {
1262 Klass* aklass = Universe::typeArrayKlassObj(type);
1263 assert(aklass != nullptr, "correct bootstrap");
1264 release_set_array_klass(java_class, aklass);
1265 }
1266 #ifdef ASSERT
1267 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1268 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1269 #endif
1270 return java_class;
1271 }
1272
1273 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1274 assert(is_instance(java_class), "must be a Class object");
1275 java_class->metadata_field_put(_klass_offset, klass);
1276 }
1277
1278
1279 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1280 assert(is_instance(java_class), "must be a Class object");
1281 Symbol* name = nullptr;
1282 bool is_instance = false;
1283 if (is_primitive(java_class)) {
1284 name = vmSymbols::type_signature(primitive_type(java_class));
1285 } else {
1286 Klass* k = as_Klass(java_class);
1287 is_instance = k->is_instance_klass();
1288 name = k->name();
1289 }
1290 if (name == nullptr) {
1291 st->print("<null>");
1292 return;
1293 }
1294 if (is_instance) st->print("L");
1295 st->write((char*) name->base(), (int) name->utf8_length());
1296 if (is_instance) st->print(";");
1297 }
1298
1299 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1300 assert(is_instance(java_class), "must be a Class object");
1301 Symbol* name;
1302 if (is_primitive(java_class)) {
1303 name = vmSymbols::type_signature(primitive_type(java_class));
1304 // Because this can create a new symbol, the caller has to decrement
1305 // the refcount, so make adjustment here and below for symbols returned
1306 // that are not created or incremented due to a successful lookup.
1307 name->increment_refcount();
1308 } else {
1309 Klass* k = as_Klass(java_class);
1310 if (!k->is_instance_klass()) {
1311 name = k->name();
1312 name->increment_refcount();
1313 } else {
1314 ResourceMark rm;
1315 const char* sigstr = k->signature_name();
1316 int siglen = (int) strlen(sigstr);
1317 if (!intern_if_not_found) {
1318 name = SymbolTable::probe(sigstr, siglen);
1319 } else {
1320 name = SymbolTable::new_symbol(sigstr, siglen);
1321 }
1322 }
1323 }
1324 return name;
1325 }
1326
1327 // Returns the Java name for this Java mirror (Resource allocated)
1328 // See Klass::external_name().
1329 // For primitive type Java mirrors, its type name is returned.
1330 const char* java_lang_Class::as_external_name(oop java_class) {
1331 assert(is_instance(java_class), "must be a Class object");
1332 const char* name = nullptr;
1333 if (is_primitive(java_class)) {
1334 name = type2name(primitive_type(java_class));
1335 } else {
1336 name = as_Klass(java_class)->external_name();
1337 }
1338 if (name == nullptr) {
1339 name = "<null>";
1340 }
1341 return name;
1342 }
1343
1344 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1345 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1346 assert(k == nullptr || k->is_klass() && k->is_array_klass(), "should be array klass");
1347 return k;
1348 }
1349
1350
1351 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1352 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1353 java_class->release_metadata_field_put(_array_klass_offset, klass);
1354 }
1355
1356
1357 BasicType java_lang_Class::primitive_type(oop java_class) {
1358 assert(is_primitive(java_class), "just checking");
1359 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1360 BasicType type = T_VOID;
1361 if (ak != nullptr) {
1362 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1363 type = ArrayKlass::cast(ak)->element_type();
1364 } else {
1365 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1366 }
1367 #ifdef ASSERT
1368 if (CDSConfig::is_dumping_heap()) {
1369 oop mirror = Universe::java_mirror(type);
1370 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1371 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1372 } else {
1373 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1374 }
1375 #endif
1376 return type;
1377 }
1378
1379 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1380 assert(is_instance(java_class), "must be a Class object");
1381 if (is_primitive(java_class)) {
1382 if (reference_klass != nullptr)
1383 (*reference_klass) = nullptr;
1384 return primitive_type(java_class);
1385 } else {
1386 if (reference_klass != nullptr)
1387 (*reference_klass) = as_Klass(java_class);
1388 return T_OBJECT;
1389 }
1390 }
1391
1392
1393 oop java_lang_Class::primitive_mirror(BasicType t) {
1394 oop mirror = Universe::java_mirror(t);
1395 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1396 assert(is_primitive(mirror), "must be primitive");
1397 return mirror;
1398 }
1399
1400 #define CLASS_FIELDS_DO(macro) \
1401 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1402 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1403 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1404 macro(_module_offset, k, "module", module_signature, false); \
1405 macro(_name_offset, k, "name", string_signature, false); \
1406 macro(_classData_offset, k, "classData", object_signature, false);
1407
1408 void java_lang_Class::compute_offsets() {
1409 if (_offsets_computed) {
1410 return;
1411 }
1412
1413 _offsets_computed = true;
1414
1415 InstanceKlass* k = vmClasses::Class_klass();
1416 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1417
1418 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1419 }
1420
1421 #if INCLUDE_CDS
1422 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1423 f->do_bool(&_offsets_computed);
1424
1425 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1426
1427 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1428 }
1429 #endif
1430
1431 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1432 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1433 return the_class_mirror->int_field(_classRedefinedCount_offset);
1434 }
1435
1436 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1437 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1438 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1439 }
1440
1441
1442 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1443 // platform thread structure, and a eetop offset which was used for thread
1444 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1445 // merged, so in the HotSpot VM we just use the eetop field for the thread
1446 // instead of the privateInfo_offset.
1447 //
1448 // Note: The stackSize field is only present starting in 1.4.
1449
1450 int java_lang_Thread_FieldHolder::_group_offset;
1451 int java_lang_Thread_FieldHolder::_priority_offset;
1452 int java_lang_Thread_FieldHolder::_stackSize_offset;
1453 int java_lang_Thread_FieldHolder::_daemon_offset;
1454 int java_lang_Thread_FieldHolder::_thread_status_offset;
1455
1456 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1457 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1458 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1459 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1460 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1461 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1462
1463 void java_lang_Thread_FieldHolder::compute_offsets() {
1464 assert(_group_offset == 0, "offsets should be initialized only once");
1465
1466 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1467 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1468 }
1469
1470 #if INCLUDE_CDS
1471 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1472 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1473 }
1474 #endif
1475
1476 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1477 return holder->obj_field(_group_offset);
1478 }
1479
1480 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1481 return (ThreadPriority)holder->int_field(_priority_offset);
1482 }
1483
1484 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1485 holder->int_field_put(_priority_offset, priority);
1486 }
1487
1488 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1489 return holder->long_field(_stackSize_offset);
1490 }
1491
1492 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1493 return holder->bool_field(_daemon_offset) != 0;
1494 }
1495
1496 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1497 assert(val, "daemon status is never turned off");
1498 holder->bool_field_put(_daemon_offset, val);
1499 }
1500
1501 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1502 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1503 }
1504
1505 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1506 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1507 }
1508
1509
1510 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1511
1512 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1513 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1514
1515 void java_lang_Thread_Constants::compute_offsets() {
1516 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1517
1518 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1519 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1520 }
1521
1522 #if INCLUDE_CDS
1523 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1524 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1525 }
1526 #endif
1527
1528 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1529 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1530 oop base = k->static_field_base_raw();
1531 return base->obj_field(_static_VTHREAD_GROUP_offset);
1532 }
1533
1534
1535 int java_lang_Thread::_holder_offset;
1536 int java_lang_Thread::_name_offset;
1537 int java_lang_Thread::_contextClassLoader_offset;
1538 int java_lang_Thread::_inheritedAccessControlContext_offset;
1539 int java_lang_Thread::_eetop_offset;
1540 int java_lang_Thread::_jvmti_thread_state_offset;
1541 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1542 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1543 int java_lang_Thread::_interrupted_offset;
1544 int java_lang_Thread::_tid_offset;
1545 int java_lang_Thread::_continuation_offset;
1546 int java_lang_Thread::_park_blocker_offset;
1547 int java_lang_Thread::_scopedValueBindings_offset;
1548 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1549
1550 #define THREAD_FIELDS_DO(macro) \
1551 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1552 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1553 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1554 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1555 macro(_eetop_offset, k, "eetop", long_signature, false); \
1556 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1557 macro(_tid_offset, k, "tid", long_signature, false); \
1558 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1559 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1560 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1561
1562 void java_lang_Thread::compute_offsets() {
1563 assert(_holder_offset == 0, "offsets should be initialized only once");
1564
1565 InstanceKlass* k = vmClasses::Thread_klass();
1566 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1567 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1568 }
1569
1570 #if INCLUDE_CDS
1571 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1572 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1573 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1574 }
1575 #endif
1576
1577 JavaThread* java_lang_Thread::thread(oop java_thread) {
1578 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1579 }
1580
1581 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1582 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1583 }
1584
1585 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1586 java_thread->address_field_put(_eetop_offset, (address)thread);
1587 }
1588
1589 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1590 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1591 }
1592
1593 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1594 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1595 }
1596
1597 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1598 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1599 }
1600
1601 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1602 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1603 }
1604
1605 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1606 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1607 int val = VTMS_transition_disable_count(java_thread);
1608 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1609 }
1610
1611 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1612 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1613 int val = VTMS_transition_disable_count(java_thread);
1614 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1615 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1616 }
1617
1618 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1619 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1620 }
1621
1622 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1623 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1624 }
1625
1626 int java_lang_Thread::is_in_VTMS_transition_offset() {
1627 return _jvmti_is_in_VTMS_transition_offset;
1628 }
1629
1630 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1631 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1632 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1633 }
1634
1635 oop java_lang_Thread::holder(oop java_thread) {
1636 // Note: may return null if the thread is still attaching
1637 return java_thread->obj_field(_holder_offset);
1638 }
1639
1640 bool java_lang_Thread::interrupted(oop java_thread) {
1641 // Make sure the caller can safely access oops.
1642 assert(Thread::current()->is_VM_thread() ||
1643 (JavaThread::current()->thread_state() != _thread_blocked &&
1644 JavaThread::current()->thread_state() != _thread_in_native),
1645 "Unsafe access to oop");
1646 return java_thread->bool_field_volatile(_interrupted_offset);
1647 }
1648
1649 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1650 // Make sure the caller can safely access oops.
1651 assert(Thread::current()->is_VM_thread() ||
1652 (JavaThread::current()->thread_state() != _thread_blocked &&
1653 JavaThread::current()->thread_state() != _thread_in_native),
1654 "Unsafe access to oop");
1655 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1656 }
1657
1658
1659 oop java_lang_Thread::name(oop java_thread) {
1660 return java_thread->obj_field(_name_offset);
1661 }
1662
1663
1664 void java_lang_Thread::set_name(oop java_thread, oop name) {
1665 java_thread->obj_field_put(_name_offset, name);
1666 }
1667
1668 // Convenience macros for setting and getting Thread fields that
1669 // are actually stored in the FieldHolder object of the thread.
1670 // The FieldHolder can be null whilst a thread is attaching via
1671 // JNI, and when the main thread is attaching.
1672
1673 // The default value should be the default/zero initialized value
1674 // of the field as it would be in java.lang.Thread.FieldHolder.
1675 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1676 { \
1677 oop holder = java_lang_Thread::holder(java_thread); \
1678 if (holder != nullptr) \
1679 return java_lang_Thread_FieldHolder::field(holder); \
1680 else \
1681 return default_val; \
1682 }
1683
1684 // We should never be trying to set a field of an attaching thread.
1685 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1686 { \
1687 oop holder = java_lang_Thread::holder(java_thread); \
1688 assert(holder != nullptr, "Thread not fully initialized"); \
1689 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1690 }
1691
1692
1693 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1694 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1695 }
1696
1697
1698 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1699 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1700 }
1701
1702
1703 oop java_lang_Thread::threadGroup(oop java_thread) {
1704 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1705 }
1706
1707
1708 bool java_lang_Thread::is_alive(oop java_thread) {
1709 JavaThread* thr = java_lang_Thread::thread(java_thread);
1710 return (thr != nullptr);
1711 }
1712
1713
1714 bool java_lang_Thread::is_daemon(oop java_thread) {
1715 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1716 }
1717
1718
1719 void java_lang_Thread::set_daemon(oop java_thread) {
1720 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1721 }
1722
1723 oop java_lang_Thread::context_class_loader(oop java_thread) {
1724 return java_thread->obj_field(_contextClassLoader_offset);
1725 }
1726
1727 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1728 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1729 }
1730
1731
1732 jlong java_lang_Thread::stackSize(oop java_thread) {
1733 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1734 }
1735
1736 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1737 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1738 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1739 }
1740
1741 // Read thread status value from threadStatus field in java.lang.Thread java class.
1742 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1743 // Make sure the caller is operating on behalf of the VM or is
1744 // running VM code (state == _thread_in_vm).
1745 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1746 JavaThread::current()->thread_state() == _thread_in_vm,
1747 "Java Thread is not running in vm");
1748 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1749 }
1750
1751 ByteSize java_lang_Thread::thread_id_offset() {
1752 return in_ByteSize(_tid_offset);
1753 }
1754
1755 oop java_lang_Thread::park_blocker(oop java_thread) {
1756 return java_thread->obj_field(_park_blocker_offset);
1757 }
1758
1759 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1760 ThreadsListHandle tlh(JavaThread::current());
1761 JavaThread* thread;
1762 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1763 if (is_virtual) {
1764 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1765 if (carrier_thread == nullptr) {
1766 return nullptr;
1767 }
1768 thread = java_lang_Thread::thread(carrier_thread);
1769 } else {
1770 thread = java_lang_Thread::thread(java_thread);
1771 }
1772 if (thread == nullptr) {
1773 return nullptr;
1774 }
1775
1776 class GetStackTraceClosure : public HandshakeClosure {
1777 public:
1778 const Handle _java_thread;
1779 int _depth;
1780 bool _retry_handshake;
1781 GrowableArray<Method*>* _methods;
1782 GrowableArray<int>* _bcis;
1783
1784 GetStackTraceClosure(Handle java_thread) :
1785 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1786 _methods(nullptr), _bcis(nullptr) {
1787 }
1788 ~GetStackTraceClosure() {
1789 delete _methods;
1790 delete _bcis;
1791 }
1792
1793 bool read_reset_retry() {
1794 bool ret = _retry_handshake;
1795 // If we re-execute the handshake this method need to return false
1796 // when the handshake cannot be performed. (E.g. thread terminating)
1797 _retry_handshake = false;
1798 return ret;
1799 }
1800
1801 void do_thread(Thread* th) {
1802 if (!Thread::current()->is_Java_thread()) {
1803 _retry_handshake = true;
1804 return;
1805 }
1806
1807 JavaThread* thread = JavaThread::cast(th);
1808
1809 if (!thread->has_last_Java_frame()) {
1810 return;
1811 }
1812
1813 bool carrier = false;
1814 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1815 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1816 const ContinuationEntry* ce = thread->vthread_continuation();
1817 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1818 return; // not mounted
1819 }
1820 } else {
1821 carrier = (thread->vthread_continuation() != nullptr);
1822 }
1823
1824 const int max_depth = MaxJavaStackTraceDepth;
1825 const bool skip_hidden = !ShowHiddenFrames;
1826
1827 // Pick minimum length that will cover most cases
1828 int init_length = 64;
1829 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1830 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1831
1832 int total_count = 0;
1833 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1834 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1835 vfst.next()) {
1836
1837 if (skip_hidden && (vfst.method()->is_hidden() ||
1838 vfst.method()->is_continuation_enter_intrinsic())) {
1839 continue;
1840 }
1841
1842 _methods->push(vfst.method());
1843 _bcis->push(vfst.bci());
1844 total_count++;
1845 }
1846
1847 _depth = total_count;
1848 }
1849 };
1850
1851 // Handshake with target
1852 ResourceMark rm(THREAD);
1853 HandleMark hm(THREAD);
1854 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1855 do {
1856 Handshake::execute(&gstc, &tlh, thread);
1857 } while (gstc.read_reset_retry());
1858
1859 // Stop if no stack trace is found.
1860 if (gstc._depth == 0) {
1861 return nullptr;
1862 }
1863
1864 // Convert to StackTraceElement array
1865 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1866 assert(k != nullptr, "must be loaded in 1.4+");
1867 if (k->should_be_initialized()) {
1868 k->initialize(CHECK_NULL);
1869 }
1870 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1871
1872 for (int i = 0; i < gstc._depth; i++) {
1873 methodHandle method(THREAD, gstc._methods->at(i));
1874 oop element = java_lang_StackTraceElement::create(method,
1875 gstc._bcis->at(i),
1876 CHECK_NULL);
1877 trace->obj_at_put(i, element);
1878 }
1879
1880 return trace();
1881 }
1882
1883 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1884 JavaThreadStatus status = get_thread_status(java_thread);
1885 switch (status) {
1886 case JavaThreadStatus::NEW : return "NEW";
1887 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1888 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1889 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1890 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1891 case JavaThreadStatus::PARKED : return "WAITING (parking)";
1892 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
1893 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1894 case JavaThreadStatus::TERMINATED : return "TERMINATED";
1895 default : return "UNKNOWN";
1896 };
1897 }
1898 int java_lang_ThreadGroup::_parent_offset;
1899 int java_lang_ThreadGroup::_name_offset;
1900 int java_lang_ThreadGroup::_maxPriority_offset;
1901 int java_lang_ThreadGroup::_daemon_offset;
1902
1903 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1904 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1905 return java_thread_group->obj_field(_parent_offset);
1906 }
1907
1908 // ("name as oop" accessor is not necessary)
1909
1910 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1911 oop name = java_thread_group->obj_field(_name_offset);
1912 // ThreadGroup.name can be null
1913 if (name != nullptr) {
1914 return java_lang_String::as_utf8_string(name);
1915 }
1916 return nullptr;
1917 }
1918
1919 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1920 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1921 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1922 }
1923
1924 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1925 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1926 return java_thread_group->bool_field(_daemon_offset) != 0;
1927 }
1928
1929 #define THREADGROUP_FIELDS_DO(macro) \
1930 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1931 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1932 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1933 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
1934
1935 void java_lang_ThreadGroup::compute_offsets() {
1936 assert(_parent_offset == 0, "offsets should be initialized only once");
1937
1938 InstanceKlass* k = vmClasses::ThreadGroup_klass();
1939 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1940 }
1941
1942 #if INCLUDE_CDS
1943 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1944 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1945 }
1946 #endif
1947
1948
1949 // java_lang_VirtualThread
1950
1951 int java_lang_VirtualThread::static_vthread_scope_offset;
1952 int java_lang_VirtualThread::_carrierThread_offset;
1953 int java_lang_VirtualThread::_continuation_offset;
1954 int java_lang_VirtualThread::_state_offset;
1955
1956 #define VTHREAD_FIELDS_DO(macro) \
1957 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
1958 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
1959 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1960 macro(_state_offset, k, "state", int_signature, false)
1961
1962
1963 void java_lang_VirtualThread::compute_offsets() {
1964 InstanceKlass* k = vmClasses::VirtualThread_klass();
1965 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1966 }
1967
1968 bool java_lang_VirtualThread::is_instance(oop obj) {
1969 return obj != nullptr && is_subclass(obj->klass());
1970 }
1971
1972 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
1973 oop thread = vthread->obj_field(_carrierThread_offset);
1974 return thread;
1975 }
1976
1977 oop java_lang_VirtualThread::continuation(oop vthread) {
1978 oop cont = vthread->obj_field(_continuation_offset);
1979 return cont;
1980 }
1981
1982 int java_lang_VirtualThread::state(oop vthread) {
1983 return vthread->int_field_acquire(_state_offset);
1984 }
1985
1986 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
1987 JavaThreadStatus status = JavaThreadStatus::NEW;
1988 switch (state & ~SUSPENDED) {
1989 case NEW :
1990 status = JavaThreadStatus::NEW;
1991 break;
1992 case STARTED :
1993 case RUNNABLE :
1994 case RUNNING :
1995 case PARKING :
1996 case TIMED_PARKING:
1997 case YIELDING :
1998 case BLOCKING :
1999 status = JavaThreadStatus::RUNNABLE;
2000 break;
2001 case PARKED :
2002 case PINNED :
2003 status = JavaThreadStatus::PARKED;
2004 break;
2005 case TIMED_PARKED:
2006 case TIMED_PINNED:
2007 status = JavaThreadStatus::PARKED_TIMED;
2008 break;
2009 case BLOCKED:
2010 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2011 break;
2012 case TERMINATED :
2013 status = JavaThreadStatus::TERMINATED;
2014 break;
2015 default:
2016 ShouldNotReachHere();
2017 }
2018 return status;
2019 }
2020
2021 #if INCLUDE_CDS
2022 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2023 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2024 }
2025 #endif
2026
2027 // java_lang_Throwable
2028
2029 int java_lang_Throwable::_backtrace_offset;
2030 int java_lang_Throwable::_detailMessage_offset;
2031 int java_lang_Throwable::_stackTrace_offset;
2032 int java_lang_Throwable::_depth_offset;
2033 int java_lang_Throwable::_cause_offset;
2034 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2035
2036 #define THROWABLE_FIELDS_DO(macro) \
2037 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2038 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2039 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2040 macro(_depth_offset, k, "depth", int_signature, false); \
2041 macro(_cause_offset, k, "cause", throwable_signature, false); \
2042 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2043
2044 void java_lang_Throwable::compute_offsets() {
2045 InstanceKlass* k = vmClasses::Throwable_klass();
2046 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2047 }
2048
2049 #if INCLUDE_CDS
2050 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2051 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2052 }
2053 #endif
2054
2055 oop java_lang_Throwable::unassigned_stacktrace() {
2056 InstanceKlass* ik = vmClasses::Throwable_klass();
2057 oop base = ik->static_field_base_raw();
2058 return base->obj_field(_static_unassigned_stacktrace_offset);
2059 }
2060
2061 oop java_lang_Throwable::backtrace(oop throwable) {
2062 return throwable->obj_field_acquire(_backtrace_offset);
2063 }
2064
2065
2066 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2067 throwable->release_obj_field_put(_backtrace_offset, value);
2068 }
2069
2070 int java_lang_Throwable::depth(oop throwable) {
2071 return throwable->int_field(_depth_offset);
2072 }
2073
2074 void java_lang_Throwable::set_depth(oop throwable, int value) {
2075 throwable->int_field_put(_depth_offset, value);
2076 }
2077
2078 oop java_lang_Throwable::message(oop throwable) {
2079 return throwable->obj_field(_detailMessage_offset);
2080 }
2081
2082 oop java_lang_Throwable::cause(oop throwable) {
2083 return throwable->obj_field(_cause_offset);
2084 }
2085
2086 // Return Symbol for detailed_message or null
2087 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2088 PreserveExceptionMark pm(Thread::current());
2089 oop detailed_message = java_lang_Throwable::message(throwable);
2090 if (detailed_message != nullptr) {
2091 return java_lang_String::as_symbol(detailed_message);
2092 }
2093 return nullptr;
2094 }
2095
2096 void java_lang_Throwable::set_message(oop throwable, oop value) {
2097 throwable->obj_field_put(_detailMessage_offset, value);
2098 }
2099
2100
2101 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2102 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2103 }
2104
2105 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2106 set_stacktrace(throwable, nullptr);
2107 }
2108
2109
2110 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2111 ResourceMark rm;
2112 Klass* k = throwable->klass();
2113 assert(k != nullptr, "just checking");
2114 st->print("%s", k->external_name());
2115 oop msg = message(throwable);
2116 if (msg != nullptr) {
2117 st->print(": %s", java_lang_String::as_utf8_string(msg));
2118 }
2119 }
2120
2121 // After this many redefines, the stack trace is unreliable.
2122 const int MAX_VERSION = USHRT_MAX;
2123
2124 static inline bool version_matches(Method* method, int version) {
2125 assert(version < MAX_VERSION, "version is too big");
2126 return method != nullptr && (method->constants()->version() == version);
2127 }
2128
2129 // This class provides a simple wrapper over the internal structure of
2130 // exception backtrace to insulate users of the backtrace from needing
2131 // to know what it looks like.
2132 // The code of this class is not GC safe. Allocations can only happen
2133 // in expand().
2134 class BacktraceBuilder: public StackObj {
2135 friend class BacktraceIterator;
2136 private:
2137 Handle _backtrace;
2138 objArrayOop _head;
2139 typeArrayOop _methods;
2140 typeArrayOop _bcis;
2141 objArrayOop _mirrors;
2142 typeArrayOop _names; // Needed to insulate method name against redefinition.
2143 // True if the top frame of the backtrace is omitted because it shall be hidden.
2144 bool _has_hidden_top_frame;
2145 int _index;
2146 NoSafepointVerifier _nsv;
2147
2148 enum {
2149 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2150 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2151 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2152 trace_names_offset = java_lang_Throwable::trace_names_offset,
2153 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2154 trace_next_offset = java_lang_Throwable::trace_next_offset,
2155 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2156 trace_size = java_lang_Throwable::trace_size,
2157 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2158 };
2159
2160 // get info out of chunks
2161 static typeArrayOop get_methods(objArrayHandle chunk) {
2162 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2163 assert(methods != nullptr, "method array should be initialized in backtrace");
2164 return methods;
2165 }
2166 static typeArrayOop get_bcis(objArrayHandle chunk) {
2167 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2168 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2169 return bcis;
2170 }
2171 static objArrayOop get_mirrors(objArrayHandle chunk) {
2172 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2173 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2174 return mirrors;
2175 }
2176 static typeArrayOop get_names(objArrayHandle chunk) {
2177 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2178 assert(names != nullptr, "names array should be initialized in backtrace");
2179 return names;
2180 }
2181 static bool has_hidden_top_frame(objArrayHandle chunk) {
2182 oop hidden = chunk->obj_at(trace_hidden_offset);
2183 return hidden != nullptr;
2184 }
2185
2186 public:
2187
2188 // constructor for new backtrace
2189 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2190 expand(CHECK);
2191 _backtrace = Handle(THREAD, _head);
2192 _index = 0;
2193 }
2194
2195 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2196 _methods = get_methods(backtrace);
2197 _bcis = get_bcis(backtrace);
2198 _mirrors = get_mirrors(backtrace);
2199 _names = get_names(backtrace);
2200 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2201 assert(_methods->length() == _bcis->length() &&
2202 _methods->length() == _mirrors->length() &&
2203 _mirrors->length() == _names->length(),
2204 "method and source information arrays should match");
2205
2206 // head is the preallocated backtrace
2207 _head = backtrace();
2208 _backtrace = Handle(thread, _head);
2209 _index = 0;
2210 }
2211
2212 void expand(TRAPS) {
2213 objArrayHandle old_head(THREAD, _head);
2214 PauseNoSafepointVerifier pnsv(&_nsv);
2215
2216 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2217 objArrayHandle new_head(THREAD, head);
2218
2219 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2220 typeArrayHandle new_methods(THREAD, methods);
2221
2222 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2223 typeArrayHandle new_bcis(THREAD, bcis);
2224
2225 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2226 objArrayHandle new_mirrors(THREAD, mirrors);
2227
2228 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2229 typeArrayHandle new_names(THREAD, names);
2230
2231 if (!old_head.is_null()) {
2232 old_head->obj_at_put(trace_next_offset, new_head());
2233 }
2234 new_head->obj_at_put(trace_methods_offset, new_methods());
2235 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2236 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2237 new_head->obj_at_put(trace_names_offset, new_names());
2238 new_head->obj_at_put(trace_hidden_offset, nullptr);
2239
2240 _head = new_head();
2241 _methods = new_methods();
2242 _bcis = new_bcis();
2243 _mirrors = new_mirrors();
2244 _names = new_names();
2245 _index = 0;
2246 }
2247
2248 oop backtrace() {
2249 return _backtrace();
2250 }
2251
2252 inline void push(Method* method, int bci, TRAPS) {
2253 // Smear the -1 bci to 0 since the array only holds unsigned
2254 // shorts. The later line number lookup would just smear the -1
2255 // to a 0 even if it could be recorded.
2256 if (bci == SynchronizationEntryBCI) bci = 0;
2257
2258 if (_index >= trace_chunk_size) {
2259 methodHandle mhandle(THREAD, method);
2260 expand(CHECK);
2261 method = mhandle();
2262 }
2263
2264 _methods->ushort_at_put(_index, method->orig_method_idnum());
2265 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2266
2267 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2268 // klass owning the symbols alive so their refcounts aren't decremented.
2269 Symbol* name = method->name();
2270 _names->symbol_at_put(_index, name);
2271
2272 // We need to save the mirrors in the backtrace to keep the class
2273 // from being unloaded while we still have this stack trace.
2274 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2275 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2276
2277 _index++;
2278 }
2279
2280 void set_has_hidden_top_frame() {
2281 if (!_has_hidden_top_frame) {
2282 // It would be nice to add java/lang/Boolean::TRUE here
2283 // to indicate that this backtrace has a hidden top frame.
2284 // But this code is used before TRUE is allocated.
2285 // Therefore let's just use an arbitrary legal oop
2286 // available right here. _methods is a short[].
2287 assert(_methods != nullptr, "we need a legal oop");
2288 _has_hidden_top_frame = true;
2289 _head->obj_at_put(trace_hidden_offset, _methods);
2290 }
2291 }
2292 };
2293
2294 struct BacktraceElement : public StackObj {
2295 int _method_id;
2296 int _bci;
2297 int _version;
2298 Symbol* _name;
2299 Handle _mirror;
2300 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2301 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2302 };
2303
2304 class BacktraceIterator : public StackObj {
2305 int _index;
2306 objArrayHandle _result;
2307 objArrayHandle _mirrors;
2308 typeArrayHandle _methods;
2309 typeArrayHandle _bcis;
2310 typeArrayHandle _names;
2311
2312 void init(objArrayHandle result, Thread* thread) {
2313 // Get method id, bci, version and mirror from chunk
2314 _result = result;
2315 if (_result.not_null()) {
2316 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2317 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2318 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2319 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2320 _index = 0;
2321 }
2322 }
2323 public:
2324 BacktraceIterator(objArrayHandle result, Thread* thread) {
2325 init(result, thread);
2326 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2327 }
2328
2329 BacktraceElement next(Thread* thread) {
2330 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2331 _methods->ushort_at(_index),
2332 Backtrace::version_at(_bcis->int_at(_index)),
2333 Backtrace::bci_at(_bcis->int_at(_index)),
2334 _names->symbol_at(_index));
2335 _index++;
2336
2337 if (_index >= java_lang_Throwable::trace_chunk_size) {
2338 int next_offset = java_lang_Throwable::trace_next_offset;
2339 // Get next chunk
2340 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2341 init(result, thread);
2342 }
2343 return e;
2344 }
2345
2346 bool repeat() {
2347 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2348 }
2349 };
2350
2351
2352 // Print stack trace element to resource allocated buffer
2353 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2354 int version, int bci, Symbol* name) {
2355 ResourceMark rm;
2356
2357 // Get strings and string lengths
2358 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2359 const char* klass_name = holder->external_name();
2360 int buf_len = (int)strlen(klass_name);
2361
2362 char* method_name = name->as_C_string();
2363 buf_len += (int)strlen(method_name);
2364
2365 char* source_file_name = nullptr;
2366 Symbol* source = Backtrace::get_source_file_name(holder, version);
2367 if (source != nullptr) {
2368 source_file_name = source->as_C_string();
2369 buf_len += (int)strlen(source_file_name);
2370 }
2371
2372 char *module_name = nullptr, *module_version = nullptr;
2373 ModuleEntry* module = holder->module();
2374 if (module->is_named()) {
2375 module_name = module->name()->as_C_string();
2376 buf_len += (int)strlen(module_name);
2377 if (module->version() != nullptr) {
2378 module_version = module->version()->as_C_string();
2379 buf_len += (int)strlen(module_version);
2380 }
2381 }
2382
2383 // Allocate temporary buffer with extra space for formatting and line number
2384 const size_t buf_size = buf_len + 64;
2385 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2386
2387 // Print stack trace line in buffer
2388 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2389
2390 // Print module information
2391 if (module_name != nullptr) {
2392 if (module_version != nullptr) {
2393 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2394 } else {
2395 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2396 }
2397 }
2398
2399 // The method can be null if the requested class version is gone
2400 Method* method = holder->method_with_orig_idnum(method_id, version);
2401 if (!version_matches(method, version)) {
2402 strcat(buf, "Redefined)");
2403 } else {
2404 int line_number = Backtrace::get_line_number(method, bci);
2405 if (line_number == -2) {
2406 strcat(buf, "Native Method)");
2407 } else {
2408 if (source_file_name != nullptr && (line_number != -1)) {
2409 // Sourcename and linenumber
2410 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2411 } else if (source_file_name != nullptr) {
2412 // Just sourcename
2413 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2414 } else {
2415 // Neither sourcename nor linenumber
2416 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2417 }
2418 CompiledMethod* nm = method->code();
2419 if (WizardMode && nm != nullptr) {
2420 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2421 }
2422 }
2423 }
2424
2425 st->print_cr("%s", buf);
2426 }
2427
2428 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2429 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2430 int method_id = method->orig_method_idnum();
2431 int version = method->constants()->version();
2432 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2433 }
2434
2435 /**
2436 * Print the throwable message and its stack trace plus all causes by walking the
2437 * cause chain. The output looks the same as of Throwable.printStackTrace().
2438 */
2439 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2440 // First, print the message.
2441 print(throwable(), st);
2442 st->cr();
2443
2444 // Now print the stack trace.
2445 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2446 while (throwable.not_null()) {
2447 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2448 if (result.is_null()) {
2449 st->print_raw_cr("\t<<no stack trace available>>");
2450 return;
2451 }
2452 BacktraceIterator iter(result, THREAD);
2453
2454 while (iter.repeat()) {
2455 BacktraceElement bte = iter.next(THREAD);
2456 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2457 }
2458 if (THREAD->can_call_java()) {
2459 // Call getCause() which doesn't necessarily return the _cause field.
2460 ExceptionMark em(THREAD);
2461 JavaValue cause(T_OBJECT);
2462 JavaCalls::call_virtual(&cause,
2463 throwable,
2464 throwable->klass(),
2465 vmSymbols::getCause_name(),
2466 vmSymbols::void_throwable_signature(),
2467 THREAD);
2468 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2469 if (HAS_PENDING_EXCEPTION) {
2470 CLEAR_PENDING_EXCEPTION;
2471 throwable = Handle();
2472 } else {
2473 throwable = Handle(THREAD, cause.get_oop());
2474 if (throwable.not_null()) {
2475 st->print("Caused by: ");
2476 print(throwable(), st);
2477 st->cr();
2478 }
2479 }
2480 } else {
2481 st->print_raw_cr("<<cannot call Java to get cause>>");
2482 return;
2483 }
2484 }
2485 }
2486
2487 /**
2488 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2489 */
2490 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2491 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2492 JavaValue result(T_VOID);
2493 JavaCalls::call_virtual(&result,
2494 throwable,
2495 vmClasses::Throwable_klass(),
2496 vmSymbols::printStackTrace_name(),
2497 vmSymbols::void_method_signature(),
2498 THREAD);
2499 }
2500
2501 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2502 if (!StackTraceInThrowable) return;
2503 ResourceMark rm(THREAD);
2504
2505 // Start out by clearing the backtrace for this object, in case the VM
2506 // runs out of memory while allocating the stack trace
2507 set_backtrace(throwable(), nullptr);
2508 // Clear lazily constructed Java level stacktrace if refilling occurs
2509 // This is unnecessary in 1.7+ but harmless
2510 clear_stacktrace(throwable());
2511
2512 int max_depth = MaxJavaStackTraceDepth;
2513 JavaThread* thread = THREAD;
2514
2515 BacktraceBuilder bt(CHECK);
2516
2517 // If there is no Java frame just return the method that was being called
2518 // with bci 0
2519 if (!thread->has_last_Java_frame()) {
2520 if (max_depth >= 1 && method() != nullptr) {
2521 bt.push(method(), 0, CHECK);
2522 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2523 set_depth(throwable(), 1);
2524 set_backtrace(throwable(), bt.backtrace());
2525 }
2526 return;
2527 }
2528
2529 // Instead of using vframe directly, this version of fill_in_stack_trace
2530 // basically handles everything by hand. This significantly improved the
2531 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2532 // See bug 6333838 for more details.
2533 // The "ASSERT" here is to verify this method generates the exactly same stack
2534 // trace as utilizing vframe.
2535 #ifdef ASSERT
2536 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2537 #endif
2538 int total_count = 0;
2539 RegisterMap map(thread,
2540 RegisterMap::UpdateMap::skip,
2541 RegisterMap::ProcessFrames::skip,
2542 RegisterMap::WalkContinuation::include);
2543 int decode_offset = 0;
2544 CompiledMethod* nm = nullptr;
2545 bool skip_fillInStackTrace_check = false;
2546 bool skip_throwableInit_check = false;
2547 bool skip_hidden = !ShowHiddenFrames;
2548 bool show_carrier = ShowCarrierFrames;
2549 ContinuationEntry* cont_entry = thread->last_continuation();
2550 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2551 Method* method = nullptr;
2552 int bci = 0;
2553
2554 // Compiled java method case.
2555 if (decode_offset != 0) {
2556 DebugInfoReadStream stream(nm, decode_offset);
2557 decode_offset = stream.read_int();
2558 method = (Method*)nm->metadata_at(stream.read_int());
2559 bci = stream.read_bci();
2560 } else {
2561 if (fr.is_first_frame()) break;
2562
2563 if (Continuation::is_continuation_enterSpecial(fr)) {
2564 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2565 if (!show_carrier && cont_entry->is_virtual_thread()) {
2566 break;
2567 }
2568 cont_entry = cont_entry->parent();
2569 }
2570
2571 address pc = fr.pc();
2572 if (fr.is_interpreted_frame()) {
2573 address bcp;
2574 if (!map.in_cont()) {
2575 bcp = fr.interpreter_frame_bcp();
2576 method = fr.interpreter_frame_method();
2577 } else {
2578 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2579 method = map.stack_chunk()->interpreter_frame_method(fr);
2580 }
2581 bci = method->bci_from(bcp);
2582 fr = fr.sender(&map);
2583 } else {
2584 CodeBlob* cb = fr.cb();
2585 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2586 // but non nmethod
2587 fr = fr.sender(&map);
2588 if (cb == nullptr || !cb->is_compiled()) {
2589 continue;
2590 }
2591 nm = cb->as_compiled_method();
2592 assert(nm->method() != nullptr, "must be");
2593 if (nm->method()->is_native()) {
2594 method = nm->method();
2595 bci = 0;
2596 } else {
2597 PcDesc* pd = nm->pc_desc_at(pc);
2598 decode_offset = pd->scope_decode_offset();
2599 // if decode_offset is not equal to 0, it will execute the
2600 // "compiled java method case" at the beginning of the loop.
2601 continue;
2602 }
2603 }
2604 }
2605 #ifdef ASSERT
2606 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2607 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2608 st.next();
2609 }
2610 #endif
2611
2612 // the format of the stacktrace will be:
2613 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2614 // - 0 or more <init> methods for the exception class (skipped)
2615 // - rest of the stack
2616
2617 if (!skip_fillInStackTrace_check) {
2618 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2619 throwable->is_a(method->method_holder())) {
2620 continue;
2621 }
2622 else {
2623 skip_fillInStackTrace_check = true; // gone past them all
2624 }
2625 }
2626 if (!skip_throwableInit_check) {
2627 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2628
2629 // skip <init> methods of the exception class and superclasses
2630 // This is similar to classic VM.
2631 if (method->name() == vmSymbols::object_initializer_name() &&
2632 throwable->is_a(method->method_holder())) {
2633 continue;
2634 } else {
2635 // there are none or we've seen them all - either way stop checking
2636 skip_throwableInit_check = true;
2637 }
2638 }
2639 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2640 if (skip_hidden) {
2641 if (total_count == 0) {
2642 // The top frame will be hidden from the stack trace.
2643 bt.set_has_hidden_top_frame();
2644 }
2645 continue;
2646 }
2647 }
2648
2649 bt.push(method, bci, CHECK);
2650 total_count++;
2651 }
2652
2653 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2654
2655 // Put completed stack trace into throwable object
2656 set_backtrace(throwable(), bt.backtrace());
2657 set_depth(throwable(), total_count);
2658 }
2659
2660 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2661 // No-op if stack trace is disabled
2662 if (!StackTraceInThrowable) {
2663 return;
2664 }
2665
2666 // Disable stack traces for some preallocated out of memory errors
2667 if (!Universe::should_fill_in_stack_trace(throwable)) {
2668 return;
2669 }
2670
2671 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2672 PreserveExceptionMark pm(THREAD);
2673
2674 fill_in_stack_trace(throwable, method, THREAD);
2675 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2676 // original exception via the PreserveExceptionMark destructor.
2677 CLEAR_PENDING_EXCEPTION;
2678 }
2679
2680 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2681 // Allocate stack trace - backtrace is created but not filled in
2682
2683 // No-op if stack trace is disabled
2684 if (!StackTraceInThrowable) return;
2685 BacktraceBuilder bt(CHECK); // creates a backtrace
2686 set_backtrace(throwable(), bt.backtrace());
2687 }
2688
2689
2690 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2691 // Fill in stack trace into preallocated backtrace (no GC)
2692
2693 // No-op if stack trace is disabled
2694 if (!StackTraceInThrowable) return;
2695
2696 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2697
2698 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2699
2700 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2701 assert(backtrace.not_null(), "backtrace should have been preallocated");
2702
2703 ResourceMark rm(THREAD);
2704 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2705
2706 BacktraceBuilder bt(THREAD, backtrace);
2707
2708 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2709 // methods as preallocated errors aren't created by "java" code.
2710
2711 // fill in as much stack trace as possible
2712 int chunk_count = 0;
2713 for (;!st.at_end(); st.next()) {
2714 bt.push(st.method(), st.bci(), CHECK);
2715 chunk_count++;
2716
2717 // Bail-out for deep stacks
2718 if (chunk_count >= trace_chunk_size) break;
2719 }
2720 set_depth(throwable(), chunk_count);
2721 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2722
2723 // We support the Throwable immutability protocol defined for Java 7.
2724 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2725 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2726 }
2727
2728 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2729 objArrayHandle stack_trace_array_h, TRAPS) {
2730
2731 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2732 THROW(vmSymbols::java_lang_NullPointerException());
2733 }
2734
2735 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2736
2737 if (stack_trace_array_h->length() != depth) {
2738 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2739 }
2740
2741 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2742 BacktraceIterator iter(result, THREAD);
2743
2744 int index = 0;
2745 while (iter.repeat()) {
2746 BacktraceElement bte = iter.next(THREAD);
2747
2748 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2749
2750 if (stack_trace_element.is_null()) {
2751 THROW(vmSymbols::java_lang_NullPointerException());
2752 }
2753
2754 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2755 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2756
2757 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2758 method,
2759 bte._version,
2760 bte._bci,
2761 bte._name,
2762 CHECK);
2763 }
2764 }
2765
2766 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2767 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2768 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2769 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2770 // symbolic stacktrace of 'throwable'.
2771 assert(throwable.not_null(), "shouldn't be");
2772
2773 // Now create the message from the original exception and thread name.
2774 ResourceMark rm(current);
2775 const char *message = nullptr;
2776 oop detailed_message = java_lang_Throwable::message(throwable());
2777 if (detailed_message != nullptr) {
2778 message = java_lang_String::as_utf8_string(detailed_message);
2779 }
2780 stringStream st;
2781 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2782 message == nullptr ? "" : ":");
2783 if (message == nullptr) {
2784 st.print("[in thread \"%s\"]", current->name());
2785 } else {
2786 st.print("%s [in thread \"%s\"]", message, current->name());
2787 }
2788
2789 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2790 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2791 // If new_exception returns a different exception while creating the exception,
2792 // abandon the attempt to save the initialization error and return null.
2793 if (init_error->klass()->name() != exception_name) {
2794 log_info(class, init)("Exception %s thrown while saving initialization exception",
2795 init_error->klass()->external_name());
2796 return Handle();
2797 }
2798
2799 // Call to java to fill in the stack trace and clear declaringClassObject to
2800 // not keep classes alive in the stack trace.
2801 // call this: public StackTraceElement[] getStackTrace()
2802 JavaValue result(T_ARRAY);
2803 JavaCalls::call_virtual(&result, throwable,
2804 vmClasses::Throwable_klass(),
2805 vmSymbols::getStackTrace_name(),
2806 vmSymbols::getStackTrace_signature(),
2807 current);
2808 if (!current->has_pending_exception()){
2809 Handle stack_trace(current, result.get_oop());
2810 assert(stack_trace->is_objArray(), "Should be an array");
2811 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2812 // Clear backtrace because the stacktrace should be used instead.
2813 set_backtrace(init_error(), nullptr);
2814 } else {
2815 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2816 init_error->klass()->external_name());
2817 current->clear_pending_exception();
2818 }
2819
2820 return init_error;
2821 }
2822
2823 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2824 JavaThread* current = JavaThread::current();
2825 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2826 BacktraceIterator iter(result, current);
2827 // No backtrace available.
2828 if (!iter.repeat()) return false;
2829
2830 // If the exception happened in a frame that has been hidden, i.e.,
2831 // omitted from the back trace, we can not compute the message.
2832 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2833 if (hidden != nullptr) {
2834 return false;
2835 }
2836
2837 // Get first backtrace element.
2838 BacktraceElement bte = iter.next(current);
2839
2840 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2841 assert(holder != nullptr, "first element should be non-null");
2842 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2843
2844 // Original version is no longer available.
2845 if (m == nullptr || !version_matches(m, bte._version)) {
2846 return false;
2847 }
2848
2849 *method = m;
2850 *bci = bte._bci;
2851 return true;
2852 }
2853
2854 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2855 // Allocate java.lang.StackTraceElement instance
2856 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2857 assert(k != nullptr, "must be loaded in 1.4+");
2858 if (k->should_be_initialized()) {
2859 k->initialize(CHECK_NULL);
2860 }
2861
2862 Handle element = k->allocate_instance_handle(CHECK_NULL);
2863
2864 int version = method->constants()->version();
2865 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2866 return element();
2867 }
2868
2869 void java_lang_StackTraceElement::fill_in(Handle element,
2870 InstanceKlass* holder, const methodHandle& method,
2871 int version, int bci, Symbol* name, TRAPS) {
2872 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2873
2874 ResourceMark rm(THREAD);
2875 HandleMark hm(THREAD);
2876
2877 // Fill in class name
2878 Handle java_class(THREAD, holder->java_mirror());
2879 oop classname = java_lang_Class::name(java_class, CHECK);
2880 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2881 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2882
2883 oop loader = holder->class_loader();
2884 if (loader != nullptr) {
2885 oop loader_name = java_lang_ClassLoader::name(loader);
2886 if (loader_name != nullptr)
2887 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2888 }
2889
2890 // Fill in method name
2891 oop methodname = StringTable::intern(name, CHECK);
2892 java_lang_StackTraceElement::set_methodName(element(), methodname);
2893
2894 // Fill in module name and version
2895 ModuleEntry* module = holder->module();
2896 if (module->is_named()) {
2897 oop module_name = StringTable::intern(module->name(), CHECK);
2898 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2899 oop module_version;
2900 if (module->version() != nullptr) {
2901 module_version = StringTable::intern(module->version(), CHECK);
2902 } else {
2903 module_version = nullptr;
2904 }
2905 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2906 }
2907
2908 if (method() == nullptr || !version_matches(method(), version)) {
2909 // The method was redefined, accurate line number information isn't available
2910 java_lang_StackTraceElement::set_fileName(element(), nullptr);
2911 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2912 } else {
2913 Symbol* source;
2914 oop source_file;
2915 int line_number;
2916 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2917
2918 java_lang_StackTraceElement::set_fileName(element(), source_file);
2919 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2920 }
2921 }
2922
2923 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2924 InstanceKlass* holder,
2925 int version,
2926 const methodHandle& method,
2927 int bci,
2928 Symbol*& source,
2929 oop& source_file,
2930 int& line_number, TRAPS) {
2931 // Fill in source file name and line number.
2932 source = Backtrace::get_source_file_name(holder, version);
2933 source_file = java_lang_Class::source_file(java_class());
2934 if (source != nullptr) {
2935 // Class was not redefined. We can trust its cache if set,
2936 // else we have to initialize it.
2937 if (source_file == nullptr) {
2938 source_file = StringTable::intern(source, CHECK);
2939 java_lang_Class::set_source_file(java_class(), source_file);
2940 }
2941 } else {
2942 // Class was redefined. Dump the cache if it was set.
2943 if (source_file != nullptr) {
2944 source_file = nullptr;
2945 java_lang_Class::set_source_file(java_class(), source_file);
2946 }
2947 }
2948 line_number = Backtrace::get_line_number(method(), bci);
2949 }
2950
2951 #if INCLUDE_JVMCI
2952 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
2953 Symbol*& filename, int& line_number, TRAPS) {
2954 ResourceMark rm(THREAD);
2955 HandleMark hm(THREAD);
2956
2957 filename = nullptr;
2958 line_number = -1;
2959
2960 oop source_file;
2961 int version = method->constants()->version();
2962 InstanceKlass* holder = method->method_holder();
2963 Handle java_class(THREAD, holder->java_mirror());
2964 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
2965 }
2966 #endif // INCLUDE_JVMCI
2967
2968 // java_lang_ClassFrameInfo
2969
2970 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
2971 int java_lang_ClassFrameInfo::_flags_offset;
2972
2973 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
2974 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
2975 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
2976
2977 void java_lang_ClassFrameInfo::compute_offsets() {
2978 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
2979 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2980 }
2981
2982 #if INCLUDE_CDS
2983 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
2984 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2985 }
2986 #endif
2987
2988 static int get_flags(const methodHandle& m) {
2989 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
2990 if (m->is_initializer()) {
2991 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
2992 } else {
2993 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
2994 }
2995 if (m->caller_sensitive()) {
2996 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
2997 }
2998 if (m->is_hidden()) {
2999 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3000 }
3001 assert((flags & 0xFF000000) == 0, "unexpected flags");
3002 return flags;
3003 }
3004
3005 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3006 return obj->obj_field(_classOrMemberName_offset);
3007 }
3008
3009 int java_lang_ClassFrameInfo::flags(oop obj) {
3010 return obj->int_field(_flags_offset);
3011 }
3012
3013 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3014 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3015 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3016 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3017 stackFrame->int_field_put(_flags_offset, flags);
3018 }
3019
3020 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3021 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3022 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3023 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3024 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3025 stackFrame->int_field_put(_flags_offset, flags);
3026 }
3027
3028
3029 // java_lang_StackFrameInfo
3030
3031 int java_lang_StackFrameInfo::_type_offset;
3032 int java_lang_StackFrameInfo::_name_offset;
3033 int java_lang_StackFrameInfo::_bci_offset;
3034 int java_lang_StackFrameInfo::_version_offset;
3035 int java_lang_StackFrameInfo::_contScope_offset;
3036
3037 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3038 macro(_type_offset, k, "type", object_signature, false); \
3039 macro(_name_offset, k, "name", string_signature, false); \
3040 macro(_bci_offset, k, "bci", int_signature, false); \
3041 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3042
3043 void java_lang_StackFrameInfo::compute_offsets() {
3044 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3045 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3046 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3047 }
3048
3049 #if INCLUDE_CDS
3050 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3051 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3052 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3053 }
3054 #endif
3055
3056 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3057 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3058 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3059 return method;
3060 }
3061
3062 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3063 // set Method* or mid/cpref
3064 HandleMark hm(THREAD);
3065 Handle cont_h(THREAD, cont);
3066 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3067
3068 // set bci
3069 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3070 // method may be redefined; store the version
3071 int version = method->constants()->version();
3072 assert((jushort)version == version, "version should be short");
3073 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3074
3075 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3076 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3077 }
3078
3079 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3080 ResourceMark rm(THREAD);
3081 HandleMark hm(THREAD);
3082
3083 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3084 InstanceKlass* holder = method->method_holder();
3085 short version = stackFrame->short_field(_version_offset);
3086 int bci = stackFrame->int_field(_bci_offset);
3087 Symbol* name = method->name();
3088 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3089 }
3090
3091 oop java_lang_StackFrameInfo::type(oop obj) {
3092 return obj->obj_field(_type_offset);
3093 }
3094
3095 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3096 obj->obj_field_put(_type_offset, value);
3097 }
3098
3099 oop java_lang_StackFrameInfo::name(oop obj) {
3100 return obj->obj_field(_name_offset);
3101 }
3102
3103 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3104 obj->obj_field_put(_name_offset, value);
3105 }
3106
3107 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3108 obj->short_field_put(_version_offset, value);
3109 }
3110
3111 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3112 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3113 obj->int_field_put(_bci_offset, value);
3114 }
3115
3116 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3117 obj->obj_field_put(_contScope_offset, value);
3118 }
3119
3120 int java_lang_LiveStackFrameInfo::_monitors_offset;
3121 int java_lang_LiveStackFrameInfo::_locals_offset;
3122 int java_lang_LiveStackFrameInfo::_operands_offset;
3123 int java_lang_LiveStackFrameInfo::_mode_offset;
3124
3125 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3126 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3127 macro(_locals_offset, k, "locals", object_array_signature, false); \
3128 macro(_operands_offset, k, "operands", object_array_signature, false); \
3129 macro(_mode_offset, k, "mode", int_signature, false)
3130
3131 void java_lang_LiveStackFrameInfo::compute_offsets() {
3132 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3133 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3134 }
3135
3136 #if INCLUDE_CDS
3137 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3138 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3139 }
3140 #endif
3141
3142 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3143 obj->obj_field_put(_monitors_offset, value);
3144 }
3145
3146 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3147 obj->obj_field_put(_locals_offset, value);
3148 }
3149
3150 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3151 obj->obj_field_put(_operands_offset, value);
3152 }
3153
3154 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3155 obj->int_field_put(_mode_offset, value);
3156 }
3157
3158
3159 // java_lang_AccessibleObject
3160
3161 int java_lang_reflect_AccessibleObject::_override_offset;
3162
3163 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3164 macro(_override_offset, k, "override", bool_signature, false)
3165
3166 void java_lang_reflect_AccessibleObject::compute_offsets() {
3167 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3168 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3169 }
3170
3171 #if INCLUDE_CDS
3172 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3173 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3174 }
3175 #endif
3176
3177 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3178 return (jboolean) reflect->bool_field(_override_offset);
3179 }
3180
3181 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3182 reflect->bool_field_put(_override_offset, (int) value);
3183 }
3184
3185 // java_lang_reflect_Method
3186
3187 int java_lang_reflect_Method::_clazz_offset;
3188 int java_lang_reflect_Method::_name_offset;
3189 int java_lang_reflect_Method::_returnType_offset;
3190 int java_lang_reflect_Method::_parameterTypes_offset;
3191 int java_lang_reflect_Method::_exceptionTypes_offset;
3192 int java_lang_reflect_Method::_slot_offset;
3193 int java_lang_reflect_Method::_modifiers_offset;
3194 int java_lang_reflect_Method::_signature_offset;
3195 int java_lang_reflect_Method::_annotations_offset;
3196 int java_lang_reflect_Method::_parameter_annotations_offset;
3197 int java_lang_reflect_Method::_annotation_default_offset;
3198
3199 #define METHOD_FIELDS_DO(macro) \
3200 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3201 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3202 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3203 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3204 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3205 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3206 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3207 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3208 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3209 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3210 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3211
3212 void java_lang_reflect_Method::compute_offsets() {
3213 InstanceKlass* k = vmClasses::reflect_Method_klass();
3214 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3215 }
3216
3217 #if INCLUDE_CDS
3218 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3219 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3220 }
3221 #endif
3222
3223 Handle java_lang_reflect_Method::create(TRAPS) {
3224 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3225 Klass* klass = vmClasses::reflect_Method_klass();
3226 // This class is eagerly initialized during VM initialization, since we keep a reference
3227 // to one of the methods
3228 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3229 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3230 }
3231
3232 oop java_lang_reflect_Method::clazz(oop reflect) {
3233 return reflect->obj_field(_clazz_offset);
3234 }
3235
3236 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3237 reflect->obj_field_put(_clazz_offset, value);
3238 }
3239
3240 int java_lang_reflect_Method::slot(oop reflect) {
3241 return reflect->int_field(_slot_offset);
3242 }
3243
3244 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3245 reflect->int_field_put(_slot_offset, value);
3246 }
3247
3248 void java_lang_reflect_Method::set_name(oop method, oop value) {
3249 method->obj_field_put(_name_offset, value);
3250 }
3251
3252 oop java_lang_reflect_Method::return_type(oop method) {
3253 return method->obj_field(_returnType_offset);
3254 }
3255
3256 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3257 method->obj_field_put(_returnType_offset, value);
3258 }
3259
3260 oop java_lang_reflect_Method::parameter_types(oop method) {
3261 return method->obj_field(_parameterTypes_offset);
3262 }
3263
3264 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3265 method->obj_field_put(_parameterTypes_offset, value);
3266 }
3267
3268 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3269 method->obj_field_put(_exceptionTypes_offset, value);
3270 }
3271
3272 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3273 method->int_field_put(_modifiers_offset, value);
3274 }
3275
3276 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3277 method->obj_field_put(_signature_offset, value);
3278 }
3279
3280 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3281 method->obj_field_put(_annotations_offset, value);
3282 }
3283
3284 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3285 method->obj_field_put(_parameter_annotations_offset, value);
3286 }
3287
3288 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3289 method->obj_field_put(_annotation_default_offset, value);
3290 }
3291
3292 int java_lang_reflect_Constructor::_clazz_offset;
3293 int java_lang_reflect_Constructor::_parameterTypes_offset;
3294 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3295 int java_lang_reflect_Constructor::_slot_offset;
3296 int java_lang_reflect_Constructor::_modifiers_offset;
3297 int java_lang_reflect_Constructor::_signature_offset;
3298 int java_lang_reflect_Constructor::_annotations_offset;
3299 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3300
3301 #define CONSTRUCTOR_FIELDS_DO(macro) \
3302 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3303 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3304 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3305 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3306 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3307 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3308 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3309 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3310
3311 void java_lang_reflect_Constructor::compute_offsets() {
3312 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3313 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3314 }
3315
3316 #if INCLUDE_CDS
3317 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3318 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3319 }
3320 #endif
3321
3322 Handle java_lang_reflect_Constructor::create(TRAPS) {
3323 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3324 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3325 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3326 InstanceKlass* ik = InstanceKlass::cast(k);
3327 // Ensure it is initialized
3328 ik->initialize(CHECK_NH);
3329 return ik->allocate_instance_handle(THREAD);
3330 }
3331
3332 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3333 return reflect->obj_field(_clazz_offset);
3334 }
3335
3336 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3337 reflect->obj_field_put(_clazz_offset, value);
3338 }
3339
3340 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3341 return constructor->obj_field(_parameterTypes_offset);
3342 }
3343
3344 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3345 constructor->obj_field_put(_parameterTypes_offset, value);
3346 }
3347
3348 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3349 constructor->obj_field_put(_exceptionTypes_offset, value);
3350 }
3351
3352 int java_lang_reflect_Constructor::slot(oop reflect) {
3353 return reflect->int_field(_slot_offset);
3354 }
3355
3356 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3357 reflect->int_field_put(_slot_offset, value);
3358 }
3359
3360 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3361 constructor->int_field_put(_modifiers_offset, value);
3362 }
3363
3364 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3365 constructor->obj_field_put(_signature_offset, value);
3366 }
3367
3368 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3369 constructor->obj_field_put(_annotations_offset, value);
3370 }
3371
3372 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3373 method->obj_field_put(_parameter_annotations_offset, value);
3374 }
3375
3376 int java_lang_reflect_Field::_clazz_offset;
3377 int java_lang_reflect_Field::_name_offset;
3378 int java_lang_reflect_Field::_type_offset;
3379 int java_lang_reflect_Field::_slot_offset;
3380 int java_lang_reflect_Field::_modifiers_offset;
3381 int java_lang_reflect_Field::_trusted_final_offset;
3382 int java_lang_reflect_Field::_signature_offset;
3383 int java_lang_reflect_Field::_annotations_offset;
3384
3385 #define FIELD_FIELDS_DO(macro) \
3386 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3387 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3388 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3389 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3390 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3391 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3392 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3393 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3394
3395 void java_lang_reflect_Field::compute_offsets() {
3396 InstanceKlass* k = vmClasses::reflect_Field_klass();
3397 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3398 }
3399
3400 #if INCLUDE_CDS
3401 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3402 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3403 }
3404 #endif
3405
3406 Handle java_lang_reflect_Field::create(TRAPS) {
3407 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3408 Symbol* name = vmSymbols::java_lang_reflect_Field();
3409 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3410 InstanceKlass* ik = InstanceKlass::cast(k);
3411 // Ensure it is initialized
3412 ik->initialize(CHECK_NH);
3413 return ik->allocate_instance_handle(THREAD);
3414 }
3415
3416 oop java_lang_reflect_Field::clazz(oop reflect) {
3417 return reflect->obj_field(_clazz_offset);
3418 }
3419
3420 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3421 reflect->obj_field_put(_clazz_offset, value);
3422 }
3423
3424 oop java_lang_reflect_Field::name(oop field) {
3425 return field->obj_field(_name_offset);
3426 }
3427
3428 void java_lang_reflect_Field::set_name(oop field, oop value) {
3429 field->obj_field_put(_name_offset, value);
3430 }
3431
3432 oop java_lang_reflect_Field::type(oop field) {
3433 return field->obj_field(_type_offset);
3434 }
3435
3436 void java_lang_reflect_Field::set_type(oop field, oop value) {
3437 field->obj_field_put(_type_offset, value);
3438 }
3439
3440 int java_lang_reflect_Field::slot(oop reflect) {
3441 return reflect->int_field(_slot_offset);
3442 }
3443
3444 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3445 reflect->int_field_put(_slot_offset, value);
3446 }
3447
3448 int java_lang_reflect_Field::modifiers(oop field) {
3449 return field->int_field(_modifiers_offset);
3450 }
3451
3452 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3453 field->int_field_put(_modifiers_offset, value);
3454 }
3455
3456 void java_lang_reflect_Field::set_trusted_final(oop field) {
3457 field->bool_field_put(_trusted_final_offset, true);
3458 }
3459
3460 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3461 field->obj_field_put(_signature_offset, value);
3462 }
3463
3464 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3465 field->obj_field_put(_annotations_offset, value);
3466 }
3467
3468 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3469 // Allocate java.lang.reflect.RecordComponent instance
3470 HandleMark hm(THREAD);
3471 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3472 assert(ik != nullptr, "must be loaded");
3473 ik->initialize(CHECK_NULL);
3474
3475 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3476
3477 Handle decl_class(THREAD, holder->java_mirror());
3478 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3479
3480 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3481 oop component_name = StringTable::intern(name, CHECK_NULL);
3482 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3483
3484 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3485 Handle component_type_h =
3486 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3487 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3488
3489 Method* accessor_method = nullptr;
3490 {
3491 // Prepend "()" to type to create the full method signature.
3492 ResourceMark rm(THREAD);
3493 int sig_len = type->utf8_length() + 3; // "()" and null char
3494 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3495 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3496 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3497 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3498 }
3499
3500 if (accessor_method != nullptr) {
3501 methodHandle method(THREAD, accessor_method);
3502 oop m = Reflection::new_method(method, false, CHECK_NULL);
3503 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3504 } else {
3505 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3506 }
3507
3508 int sig_index = component->generic_signature_index();
3509 if (sig_index > 0) {
3510 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3511 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3512 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3513 } else {
3514 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3515 }
3516
3517 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3518 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3519
3520 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3521 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3522
3523 return element();
3524 }
3525
3526 int reflect_ConstantPool::_oop_offset;
3527
3528 #define CONSTANTPOOL_FIELDS_DO(macro) \
3529 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3530
3531 void reflect_ConstantPool::compute_offsets() {
3532 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3533 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3534 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3535 }
3536
3537 #if INCLUDE_CDS
3538 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3539 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3540 }
3541 #endif
3542
3543 int java_lang_reflect_Parameter::_name_offset;
3544 int java_lang_reflect_Parameter::_modifiers_offset;
3545 int java_lang_reflect_Parameter::_index_offset;
3546 int java_lang_reflect_Parameter::_executable_offset;
3547
3548 #define PARAMETER_FIELDS_DO(macro) \
3549 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3550 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3551 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3552 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3553
3554 void java_lang_reflect_Parameter::compute_offsets() {
3555 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3556 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3557 }
3558
3559 #if INCLUDE_CDS
3560 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3561 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3562 }
3563 #endif
3564
3565 Handle java_lang_reflect_Parameter::create(TRAPS) {
3566 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3567 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3568 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3569 InstanceKlass* ik = InstanceKlass::cast(k);
3570 // Ensure it is initialized
3571 ik->initialize(CHECK_NH);
3572 return ik->allocate_instance_handle(THREAD);
3573 }
3574
3575 oop java_lang_reflect_Parameter::name(oop param) {
3576 return param->obj_field(_name_offset);
3577 }
3578
3579 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3580 param->obj_field_put(_name_offset, value);
3581 }
3582
3583 int java_lang_reflect_Parameter::modifiers(oop param) {
3584 return param->int_field(_modifiers_offset);
3585 }
3586
3587 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3588 param->int_field_put(_modifiers_offset, value);
3589 }
3590
3591 int java_lang_reflect_Parameter::index(oop param) {
3592 return param->int_field(_index_offset);
3593 }
3594
3595 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3596 param->int_field_put(_index_offset, value);
3597 }
3598
3599 oop java_lang_reflect_Parameter::executable(oop param) {
3600 return param->obj_field(_executable_offset);
3601 }
3602
3603 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3604 param->obj_field_put(_executable_offset, value);
3605 }
3606
3607 // java_lang_Module
3608
3609 int java_lang_Module::_loader_offset;
3610 int java_lang_Module::_name_offset;
3611 int java_lang_Module::_module_entry_offset;
3612
3613 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3614 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3615 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3616 vmSymbols::java_lang_module_init_signature(),
3617 loader, module_name, CHECK_NH);
3618 }
3619
3620 #define MODULE_FIELDS_DO(macro) \
3621 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3622 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3623
3624 void java_lang_Module::compute_offsets() {
3625 InstanceKlass* k = vmClasses::Module_klass();
3626 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3627 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3628 }
3629
3630 #if INCLUDE_CDS
3631 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3632 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3633 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3634 }
3635 #endif
3636
3637 oop java_lang_Module::loader(oop module) {
3638 return module->obj_field(_loader_offset);
3639 }
3640
3641 void java_lang_Module::set_loader(oop module, oop value) {
3642 module->obj_field_put(_loader_offset, value);
3643 }
3644
3645 oop java_lang_Module::name(oop module) {
3646 return module->obj_field(_name_offset);
3647 }
3648
3649 void java_lang_Module::set_name(oop module, oop value) {
3650 module->obj_field_put(_name_offset, value);
3651 }
3652
3653 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3654 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3655 assert(module != nullptr, "module can't be null");
3656 assert(oopDesc::is_oop(module), "module must be oop");
3657
3658 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3659 return module_entry;
3660 }
3661
3662 ModuleEntry* java_lang_Module::module_entry(oop module) {
3663 ModuleEntry* module_entry = module_entry_raw(module);
3664 if (module_entry == nullptr) {
3665 // If the inject field containing the ModuleEntry* is null then return the
3666 // class loader's unnamed module.
3667 oop loader = java_lang_Module::loader(module);
3668 Handle h_loader = Handle(Thread::current(), loader);
3669 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3670 return loader_cld->unnamed_module();
3671 }
3672 return module_entry;
3673 }
3674
3675 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3676 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3677 assert(module != nullptr, "module can't be null");
3678 assert(oopDesc::is_oop(module), "module must be oop");
3679 module->address_field_put(_module_entry_offset, (address)module_entry);
3680 }
3681
3682 Handle reflect_ConstantPool::create(TRAPS) {
3683 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3684 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3685 // Ensure it is initialized
3686 k->initialize(CHECK_NH);
3687 return k->allocate_instance_handle(THREAD);
3688 }
3689
3690
3691 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3692 oop mirror = value->pool_holder()->java_mirror();
3693 // Save the mirror to get back the constant pool.
3694 reflect->obj_field_put(_oop_offset, mirror);
3695 }
3696
3697 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3698
3699 oop mirror = reflect->obj_field(_oop_offset);
3700 Klass* k = java_lang_Class::as_Klass(mirror);
3701 assert(k->is_instance_klass(), "Must be");
3702
3703 // Get the constant pool back from the klass. Since class redefinition
3704 // merges the new constant pool into the old, this is essentially the
3705 // same constant pool as the original. If constant pool merging is
3706 // no longer done in the future, this will have to change to save
3707 // the original.
3708 return InstanceKlass::cast(k)->constants();
3709 }
3710
3711
3712 // Support for java_lang_ref_Reference
3713
3714 bool java_lang_ref_Reference::_offsets_initialized;
3715
3716 int java_lang_ref_Reference::_referent_offset;
3717 int java_lang_ref_Reference::_queue_offset;
3718 int java_lang_ref_Reference::_next_offset;
3719 int java_lang_ref_Reference::_discovered_offset;
3720
3721 #define REFERENCE_FIELDS_DO(macro) \
3722 macro(_referent_offset, k, "referent", object_signature, false); \
3723 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3724 macro(_next_offset, k, "next", reference_signature, false); \
3725 macro(_discovered_offset, k, "discovered", reference_signature, false);
3726
3727 void java_lang_ref_Reference::compute_offsets() {
3728 if (_offsets_initialized) {
3729 return;
3730 }
3731 _offsets_initialized = true;
3732 InstanceKlass* k = vmClasses::Reference_klass();
3733 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3734 }
3735
3736 #if INCLUDE_CDS
3737 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3738 f->do_bool(&_offsets_initialized);
3739 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3740 }
3741 #endif
3742
3743 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3744 assert(obj != nullptr, "sanity");
3745 if (offset != _referent_offset) {
3746 return false;
3747 }
3748
3749 Klass* k = obj->klass();
3750 if (!k->is_instance_klass()) {
3751 return false;
3752 }
3753
3754 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3755 bool is_reference = ik->reference_type() != REF_NONE;
3756 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3757 return is_reference;
3758 }
3759
3760 int java_lang_boxing_object::_value_offset;
3761 int java_lang_boxing_object::_long_value_offset;
3762
3763 #define BOXING_FIELDS_DO(macro) \
3764 macro(_value_offset, integerKlass, "value", int_signature, false); \
3765 macro(_long_value_offset, longKlass, "value", long_signature, false);
3766
3767 void java_lang_boxing_object::compute_offsets() {
3768 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3769 InstanceKlass* longKlass = vmClasses::Long_klass();
3770 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3771 }
3772
3773 #if INCLUDE_CDS
3774 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3775 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3776 }
3777 #endif
3778
3779 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3780 Klass* k = vmClasses::box_klass(type);
3781 if (k == nullptr) return nullptr;
3782 InstanceKlass* ik = InstanceKlass::cast(k);
3783 if (!ik->is_initialized()) {
3784 ik->initialize(CHECK_NULL);
3785 }
3786 return ik->allocate_instance(THREAD);
3787 }
3788
3789
3790 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3791 oop box = initialize_and_allocate(type, CHECK_NULL);
3792 if (box == nullptr) return nullptr;
3793 switch (type) {
3794 case T_BOOLEAN:
3795 box->bool_field_put(_value_offset, value->z);
3796 break;
3797 case T_CHAR:
3798 box->char_field_put(_value_offset, value->c);
3799 break;
3800 case T_FLOAT:
3801 box->float_field_put(_value_offset, value->f);
3802 break;
3803 case T_DOUBLE:
3804 box->double_field_put(_long_value_offset, value->d);
3805 break;
3806 case T_BYTE:
3807 box->byte_field_put(_value_offset, value->b);
3808 break;
3809 case T_SHORT:
3810 box->short_field_put(_value_offset, value->s);
3811 break;
3812 case T_INT:
3813 box->int_field_put(_value_offset, value->i);
3814 break;
3815 case T_LONG:
3816 box->long_field_put(_long_value_offset, value->j);
3817 break;
3818 default:
3819 return nullptr;
3820 }
3821 return box;
3822 }
3823
3824
3825 BasicType java_lang_boxing_object::basic_type(oop box) {
3826 if (box == nullptr) return T_ILLEGAL;
3827 BasicType type = vmClasses::box_klass_type(box->klass());
3828 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3829 return T_ILLEGAL;
3830 return type;
3831 }
3832
3833
3834 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3835 BasicType type = vmClasses::box_klass_type(box->klass());
3836 switch (type) {
3837 case T_BOOLEAN:
3838 value->z = box->bool_field(_value_offset);
3839 break;
3840 case T_CHAR:
3841 value->c = box->char_field(_value_offset);
3842 break;
3843 case T_FLOAT:
3844 value->f = box->float_field(_value_offset);
3845 break;
3846 case T_DOUBLE:
3847 value->d = box->double_field(_long_value_offset);
3848 break;
3849 case T_BYTE:
3850 value->b = box->byte_field(_value_offset);
3851 break;
3852 case T_SHORT:
3853 value->s = box->short_field(_value_offset);
3854 break;
3855 case T_INT:
3856 value->i = box->int_field(_value_offset);
3857 break;
3858 case T_LONG:
3859 value->j = box->long_field(_long_value_offset);
3860 break;
3861 default:
3862 return T_ILLEGAL;
3863 } // end switch
3864 return type;
3865 }
3866
3867
3868 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3869 BasicType type = vmClasses::box_klass_type(box->klass());
3870 switch (type) {
3871 case T_BOOLEAN:
3872 box->bool_field_put(_value_offset, value->z);
3873 break;
3874 case T_CHAR:
3875 box->char_field_put(_value_offset, value->c);
3876 break;
3877 case T_FLOAT:
3878 box->float_field_put(_value_offset, value->f);
3879 break;
3880 case T_DOUBLE:
3881 box->double_field_put(_long_value_offset, value->d);
3882 break;
3883 case T_BYTE:
3884 box->byte_field_put(_value_offset, value->b);
3885 break;
3886 case T_SHORT:
3887 box->short_field_put(_value_offset, value->s);
3888 break;
3889 case T_INT:
3890 box->int_field_put(_value_offset, value->i);
3891 break;
3892 case T_LONG:
3893 box->long_field_put(_long_value_offset, value->j);
3894 break;
3895 default:
3896 return T_ILLEGAL;
3897 } // end switch
3898 return type;
3899 }
3900
3901
3902 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3903 switch (type) {
3904 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3905 case T_CHAR: st->print("%d", value->c); break;
3906 case T_BYTE: st->print("%d", value->b); break;
3907 case T_SHORT: st->print("%d", value->s); break;
3908 case T_INT: st->print("%d", value->i); break;
3909 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3910 case T_FLOAT: st->print("%f", value->f); break;
3911 case T_DOUBLE: st->print("%lf", value->d); break;
3912 default: st->print("type %d?", type); break;
3913 }
3914 }
3915
3916
3917 // Support for java_lang_ref_SoftReference
3918 //
3919
3920 int java_lang_ref_SoftReference::_timestamp_offset;
3921 int java_lang_ref_SoftReference::_static_clock_offset;
3922
3923 #define SOFTREFERENCE_FIELDS_DO(macro) \
3924 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
3925 macro(_static_clock_offset, k, "clock", long_signature, true)
3926
3927 void java_lang_ref_SoftReference::compute_offsets() {
3928 InstanceKlass* k = vmClasses::SoftReference_klass();
3929 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3930 }
3931
3932 #if INCLUDE_CDS
3933 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3934 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3935 }
3936 #endif
3937
3938 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3939 return ref->long_field(_timestamp_offset);
3940 }
3941
3942 jlong java_lang_ref_SoftReference::clock() {
3943 InstanceKlass* ik = vmClasses::SoftReference_klass();
3944 oop base = ik->static_field_base_raw();
3945 return base->long_field(_static_clock_offset);
3946 }
3947
3948 void java_lang_ref_SoftReference::set_clock(jlong value) {
3949 InstanceKlass* ik = vmClasses::SoftReference_klass();
3950 oop base = ik->static_field_base_raw();
3951 base->long_field_put(_static_clock_offset, value);
3952 }
3953
3954 // Support for java_lang_invoke_DirectMethodHandle
3955
3956 int java_lang_invoke_DirectMethodHandle::_member_offset;
3957
3958 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3959 oop member_name = nullptr;
3960 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3961 "a DirectMethodHandle oop is expected");
3962 return dmh->obj_field(_member_offset);
3963 }
3964
3965 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3966 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3967
3968 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3969 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
3970 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3971 }
3972
3973 #if INCLUDE_CDS
3974 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3975 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3976 }
3977 #endif
3978
3979 // Support for java_lang_invoke_MethodHandle
3980
3981 int java_lang_invoke_MethodHandle::_type_offset;
3982 int java_lang_invoke_MethodHandle::_form_offset;
3983
3984 int java_lang_invoke_MemberName::_clazz_offset;
3985 int java_lang_invoke_MemberName::_name_offset;
3986 int java_lang_invoke_MemberName::_type_offset;
3987 int java_lang_invoke_MemberName::_flags_offset;
3988 int java_lang_invoke_MemberName::_method_offset;
3989 int java_lang_invoke_MemberName::_vmindex_offset;
3990
3991 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3992 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3993
3994 int java_lang_invoke_LambdaForm::_vmentry_offset;
3995
3996 #define METHODHANDLE_FIELDS_DO(macro) \
3997 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3998 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3999
4000 void java_lang_invoke_MethodHandle::compute_offsets() {
4001 InstanceKlass* k = vmClasses::MethodHandle_klass();
4002 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4003 }
4004
4005 #if INCLUDE_CDS
4006 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4007 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4008 }
4009 #endif
4010
4011 #define MEMBERNAME_FIELDS_DO(macro) \
4012 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4013 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4014 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4015 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4016 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4017
4018 void java_lang_invoke_MemberName::compute_offsets() {
4019 InstanceKlass* k = vmClasses::MemberName_klass();
4020 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4021 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4022 }
4023
4024 #if INCLUDE_CDS
4025 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4026 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4027 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4028 }
4029 #endif
4030
4031 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4032 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4033
4034 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4035 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4036 assert(k != nullptr, "jdk mismatch");
4037 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4038 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4039 }
4040
4041 #if INCLUDE_CDS
4042 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4043 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4044 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4045 }
4046 #endif
4047
4048 #define LAMBDAFORM_FIELDS_DO(macro) \
4049 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4050
4051 void java_lang_invoke_LambdaForm::compute_offsets() {
4052 InstanceKlass* k = vmClasses::LambdaForm_klass();
4053 assert (k != nullptr, "jdk mismatch");
4054 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4055 }
4056
4057 #if INCLUDE_CDS
4058 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4059 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4060 }
4061 #endif
4062
4063 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4064 return obj != nullptr && is_subclass(obj->klass());
4065 }
4066
4067 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4068 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4069
4070 #define NEP_FIELDS_DO(macro) \
4071 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4072 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4073
4074 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4075 return obj != nullptr && is_subclass(obj->klass());
4076 }
4077
4078 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4079 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4080 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4081 }
4082
4083 #if INCLUDE_CDS
4084 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4085 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4086 }
4087 #endif
4088
4089 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4090 return entry->obj_field(_method_type_offset);
4091 }
4092
4093 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4094 return entry->long_field(_downcall_stub_address_offset);
4095 }
4096
4097 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4098 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4099 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4100 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4101 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4102 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4103 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4104
4105 #define ABIDescriptor_FIELDS_DO(macro) \
4106 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4107 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4108 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4109 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4110 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4111 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4112 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4113
4114 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4115 return obj != nullptr && is_subclass(obj->klass());
4116 }
4117
4118 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4119 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4120 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4121 }
4122
4123 #if INCLUDE_CDS
4124 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4125 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4126 }
4127 #endif
4128
4129 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4130 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4131 }
4132
4133 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4134 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4135 }
4136
4137 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4138 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4139 }
4140
4141 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4142 return entry->int_field(_stackAlignment_offset);
4143 }
4144
4145 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4146 return entry->int_field(_shadowSpace_offset);
4147 }
4148
4149 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4150 return entry->obj_field(_scratch1_offset);
4151 }
4152
4153 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4154 return entry->obj_field(_scratch2_offset);
4155 }
4156
4157 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4158 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4159 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4160 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4161
4162 #define VMStorage_FIELDS_DO(macro) \
4163 macro(_type_offset, k, "type", byte_signature, false); \
4164 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4165 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4166 macro(_debugName_offset, k, "debugName", string_signature, false); \
4167
4168 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4169 return obj != nullptr && is_subclass(obj->klass());
4170 }
4171
4172 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4173 InstanceKlass* k = vmClasses::VMStorage_klass();
4174 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4175 }
4176
4177 #if INCLUDE_CDS
4178 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4179 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4180 }
4181 #endif
4182
4183 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4184 return entry->byte_field(_type_offset);
4185 }
4186
4187 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4188 return entry->int_field(_indexOrOffset_offset);
4189 }
4190
4191 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4192 return entry->short_field(_segmentMaskOrSize_offset);
4193 }
4194
4195 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4196 return entry->obj_field(_debugName_offset);
4197 }
4198
4199 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4200 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4201
4202 #define CallConv_FIELDS_DO(macro) \
4203 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4204 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4205
4206 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4207 return obj != nullptr && is_subclass(obj->klass());
4208 }
4209
4210 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4211 InstanceKlass* k = vmClasses::CallConv_klass();
4212 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4213 }
4214
4215 #if INCLUDE_CDS
4216 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4217 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4218 }
4219 #endif
4220
4221 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4222 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4223 }
4224
4225 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4226 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4227 }
4228
4229 oop java_lang_invoke_MethodHandle::type(oop mh) {
4230 return mh->obj_field(_type_offset);
4231 }
4232
4233 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4234 mh->obj_field_put(_type_offset, mtype);
4235 }
4236
4237 oop java_lang_invoke_MethodHandle::form(oop mh) {
4238 assert(_form_offset != 0, "");
4239 return mh->obj_field(_form_offset);
4240 }
4241
4242 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4243 assert(_form_offset != 0, "");
4244 mh->obj_field_put(_form_offset, lform);
4245 }
4246
4247 /// MemberName accessors
4248
4249 oop java_lang_invoke_MemberName::clazz(oop mname) {
4250 assert(is_instance(mname), "wrong type");
4251 return mname->obj_field(_clazz_offset);
4252 }
4253
4254 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4255 assert(is_instance(mname), "wrong type");
4256 mname->obj_field_put(_clazz_offset, clazz);
4257 }
4258
4259 oop java_lang_invoke_MemberName::name(oop mname) {
4260 assert(is_instance(mname), "wrong type");
4261 return mname->obj_field(_name_offset);
4262 }
4263
4264 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4265 assert(is_instance(mname), "wrong type");
4266 mname->obj_field_put(_name_offset, name);
4267 }
4268
4269 oop java_lang_invoke_MemberName::type(oop mname) {
4270 assert(is_instance(mname), "wrong type");
4271 return mname->obj_field(_type_offset);
4272 }
4273
4274 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4275 assert(is_instance(mname), "wrong type");
4276 mname->obj_field_put(_type_offset, type);
4277 }
4278
4279 int java_lang_invoke_MemberName::flags(oop mname) {
4280 assert(is_instance(mname), "wrong type");
4281 return mname->int_field(_flags_offset);
4282 }
4283
4284 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4285 assert(is_instance(mname), "wrong type");
4286 mname->int_field_put(_flags_offset, flags);
4287 }
4288
4289
4290 // Return vmtarget from ResolvedMethodName method field through indirection
4291 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4292 assert(is_instance(mname), "wrong type");
4293 oop method = mname->obj_field(_method_offset);
4294 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4295 }
4296
4297 bool java_lang_invoke_MemberName::is_method(oop mname) {
4298 assert(is_instance(mname), "must be MemberName");
4299 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4300 }
4301
4302 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4303 assert(is_instance(mname), "wrong type");
4304 mname->obj_field_put(_method_offset, resolved_method);
4305 }
4306
4307 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4308 assert(is_instance(mname), "wrong type");
4309 return (intptr_t) mname->address_field(_vmindex_offset);
4310 }
4311
4312 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4313 assert(is_instance(mname), "wrong type");
4314 mname->address_field_put(_vmindex_offset, (address) index);
4315 }
4316
4317
4318 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4319 assert(is_instance(resolved_method), "wrong type");
4320 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4321 assert(m->is_method(), "must be");
4322 return m;
4323 }
4324
4325 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4326 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4327 assert(is_instance(resolved_method), "wrong type");
4328 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4329 }
4330
4331 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4332 assert(is_instance(resolved_method), "wrong type");
4333 resolved_method->obj_field_put(_vmholder_offset, holder);
4334 }
4335
4336 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4337 const Method* method = m();
4338
4339 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4340 oop resolved_method = ResolvedMethodTable::find_method(method);
4341 if (resolved_method != nullptr) {
4342 return resolved_method;
4343 }
4344
4345 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4346 if (!k->is_initialized()) {
4347 k->initialize(CHECK_NULL);
4348 }
4349
4350 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4351
4352 NoSafepointVerifier nsv;
4353
4354 if (method->is_old()) {
4355 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4356 method->get_new_method();
4357 }
4358
4359 InstanceKlass* holder = method->method_holder();
4360
4361 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4362 // Add a reference to the loader (actually mirror because hidden classes may not have
4363 // distinct loaders) to ensure the metadata is kept alive.
4364 // This mirror may be different than the one in clazz field.
4365 set_vmholder(new_resolved_method, holder->java_mirror());
4366
4367 // Set flag in class to indicate this InstanceKlass has entries in the table
4368 // to avoid walking table during redefinition if none of the redefined classes
4369 // have any membernames in the table.
4370 holder->set_has_resolved_methods();
4371
4372 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4373 }
4374
4375 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4376 assert(is_instance(lform), "wrong type");
4377 return lform->obj_field(_vmentry_offset);
4378 }
4379
4380
4381 // Support for java_lang_invoke_MethodType
4382
4383 int java_lang_invoke_MethodType::_rtype_offset;
4384 int java_lang_invoke_MethodType::_ptypes_offset;
4385
4386 #define METHODTYPE_FIELDS_DO(macro) \
4387 macro(_rtype_offset, k, "rtype", class_signature, false); \
4388 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4389
4390 void java_lang_invoke_MethodType::compute_offsets() {
4391 InstanceKlass* k = vmClasses::MethodType_klass();
4392 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4393 }
4394
4395 #if INCLUDE_CDS
4396 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4397 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4398 }
4399 #endif
4400
4401 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4402 st->print("(");
4403 objArrayOop pts = ptypes(mt);
4404 if (pts != nullptr) {
4405 for (int i = 0, limit = pts->length(); i < limit; i++) {
4406 java_lang_Class::print_signature(pts->obj_at(i), st);
4407 }
4408 } else {
4409 st->print("null");
4410 }
4411 st->print(")");
4412 oop rt = rtype(mt);
4413 if (rt != nullptr) {
4414 java_lang_Class::print_signature(rt, st);
4415 } else {
4416 st->print("null");
4417 }
4418 }
4419
4420 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4421 ResourceMark rm;
4422 stringStream buffer(128);
4423 print_signature(mt, &buffer);
4424 const char* sigstr = buffer.base();
4425 int siglen = (int) buffer.size();
4426 Symbol *name;
4427 if (!intern_if_not_found) {
4428 name = SymbolTable::probe(sigstr, siglen);
4429 } else {
4430 name = SymbolTable::new_symbol(sigstr, siglen);
4431 }
4432 return name;
4433 }
4434
4435 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4436 if (mt1 == mt2)
4437 return true;
4438 if (rtype(mt1) != rtype(mt2))
4439 return false;
4440 if (ptype_count(mt1) != ptype_count(mt2))
4441 return false;
4442 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4443 if (ptype(mt1, i) != ptype(mt2, i))
4444 return false;
4445 }
4446 return true;
4447 }
4448
4449 oop java_lang_invoke_MethodType::rtype(oop mt) {
4450 assert(is_instance(mt), "must be a MethodType");
4451 return mt->obj_field(_rtype_offset);
4452 }
4453
4454 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4455 assert(is_instance(mt), "must be a MethodType");
4456 return (objArrayOop) mt->obj_field(_ptypes_offset);
4457 }
4458
4459 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4460 return ptypes(mt)->obj_at(idx);
4461 }
4462
4463 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4464 return ptypes(mt)->length();
4465 }
4466
4467 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4468 objArrayOop pts = ptypes(mt);
4469 int count = pts->length();
4470 int slots = 0;
4471 for (int i = 0; i < count; i++) {
4472 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4473 slots += type2size[bt];
4474 }
4475 return slots;
4476 }
4477
4478 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4479 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4480 return type2size[bt];
4481 }
4482
4483
4484 // Support for java_lang_invoke_CallSite
4485
4486 int java_lang_invoke_CallSite::_target_offset;
4487 int java_lang_invoke_CallSite::_context_offset;
4488
4489 #define CALLSITE_FIELDS_DO(macro) \
4490 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4491 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4492
4493 void java_lang_invoke_CallSite::compute_offsets() {
4494 InstanceKlass* k = vmClasses::CallSite_klass();
4495 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4496 }
4497
4498 #if INCLUDE_CDS
4499 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4500 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4501 }
4502 #endif
4503
4504 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4505 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4506
4507 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4508 return dep_oop;
4509 }
4510
4511 // Support for java_lang_invoke_ConstantCallSite
4512
4513 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4514
4515 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4516 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4517
4518 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4519 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4520 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4521 }
4522
4523 #if INCLUDE_CDS
4524 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4525 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4526 }
4527 #endif
4528
4529 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4530
4531 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4532 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4533
4534 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4535 InstanceKlass* k = vmClasses::Context_klass();
4536 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4537 }
4538
4539 #if INCLUDE_CDS
4540 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4541 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4542 }
4543 #endif
4544
4545 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4546 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4547 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4548 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4549 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4550 return dep_ctx;
4551 }
4552
4553 // Support for java_security_AccessControlContext
4554
4555 int java_security_AccessControlContext::_context_offset;
4556 int java_security_AccessControlContext::_privilegedContext_offset;
4557 int java_security_AccessControlContext::_isPrivileged_offset;
4558 int java_security_AccessControlContext::_isAuthorized_offset;
4559
4560 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4561 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4562 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4563 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4564 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4565
4566 void java_security_AccessControlContext::compute_offsets() {
4567 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4568 InstanceKlass* k = vmClasses::AccessControlContext_klass();
4569 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4570 }
4571
4572 #if INCLUDE_CDS
4573 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4574 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4575 }
4576 #endif
4577
4578 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4579 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4580 assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4581 // Ensure klass is initialized
4582 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4583 // Allocate result
4584 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4585 // Fill in values
4586 result->obj_field_put(_context_offset, context());
4587 result->obj_field_put(_privilegedContext_offset, privileged_context());
4588 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4589 result->bool_field_put(_isAuthorized_offset, true);
4590 return result;
4591 }
4592
4593
4594 // Support for java_lang_ClassLoader
4595
4596 int java_lang_ClassLoader::_loader_data_offset;
4597 int java_lang_ClassLoader::_parallelCapable_offset;
4598 int java_lang_ClassLoader::_name_offset;
4599 int java_lang_ClassLoader::_nameAndId_offset;
4600 int java_lang_ClassLoader::_unnamedModule_offset;
4601 int java_lang_ClassLoader::_parent_offset;
4602
4603 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4604 assert(loader != nullptr, "loader must not be null");
4605 assert(oopDesc::is_oop(loader), "loader must be oop");
4606 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4607 }
4608
4609 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4610 assert(loader != nullptr, "loader must not be null");
4611 assert(oopDesc::is_oop(loader), "loader must be oop");
4612 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4613 }
4614
4615 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4616 assert(loader != nullptr, "loader must not be null");
4617 assert(oopDesc::is_oop(loader), "loader must be oop");
4618 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4619 }
4620
4621 #define CLASSLOADER_FIELDS_DO(macro) \
4622 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4623 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4624 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4625 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4626 macro(_parent_offset, k1, "parent", classloader_signature, false)
4627
4628 void java_lang_ClassLoader::compute_offsets() {
4629 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4630 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4631
4632 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4633 }
4634
4635 #if INCLUDE_CDS
4636 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4637 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4638 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4639 }
4640 #endif
4641
4642 oop java_lang_ClassLoader::parent(oop loader) {
4643 assert(is_instance(loader), "loader must be oop");
4644 return loader->obj_field(_parent_offset);
4645 }
4646
4647 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4648 assert(is_instance(loader), "loader must be oop");
4649 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4650 }
4651
4652 // Returns the name field of this class loader. If the name field has not
4653 // been set, null will be returned.
4654 oop java_lang_ClassLoader::name(oop loader) {
4655 assert(is_instance(loader), "loader must be oop");
4656 return loader->obj_field(_name_offset);
4657 }
4658
4659 // Returns the nameAndId field of this class loader. The format is
4660 // as follows:
4661 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4662 // If the defining loader has no name then <qualified-class-name> @<id>
4663 // If built-in loader, then omit '@<id>' as there is only one instance.
4664 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4665 oop java_lang_ClassLoader::nameAndId(oop loader) {
4666 assert(is_instance(loader), "loader must be oop");
4667 return loader->obj_field(_nameAndId_offset);
4668 }
4669
4670 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4671 assert(is_instance(loader), "loader must be oop");
4672 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4673 oop acl = loader;
4674 debug_only(jint loop_count = 0);
4675 // This loop taken verbatim from ClassLoader.java:
4676 do {
4677 acl = parent(acl);
4678 if (cl == acl) {
4679 return true;
4680 }
4681 assert(++loop_count > 0, "loop_count overflow");
4682 } while (acl != nullptr);
4683 return false;
4684 }
4685
4686 bool java_lang_ClassLoader::is_instance(oop obj) {
4687 return obj != nullptr && is_subclass(obj->klass());
4688 }
4689
4690
4691 // For class loader classes, parallelCapable defined
4692 // based on non-null field
4693 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4694 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4695 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4696 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4697 }
4698
4699 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4700 // Fix for 4474172; see evaluation for more details
4701 loader = non_reflection_class_loader(loader);
4702
4703 oop cl = SystemDictionary::java_system_loader();
4704 while(cl != nullptr) {
4705 if (cl == loader) return true;
4706 cl = parent(cl);
4707 }
4708 return false;
4709 }
4710
4711 // Return true if this is one of the class loaders associated with
4712 // the generated bytecodes for serialization constructor returned
4713 // by sun.reflect.ReflectionFactory::newConstructorForSerialization
4714 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4715 if (loader != nullptr) {
4716 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4717 // This might be null in non-1.4 JDKs
4718 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4719 }
4720 return false;
4721 }
4722
4723 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4724 // See whether this is one of the class loaders associated with
4725 // the generated bytecodes for reflection, and if so, "magically"
4726 // delegate to its parent to prevent class loading from occurring
4727 // in places where applications using reflection didn't expect it.
4728 if (is_reflection_class_loader(loader)) {
4729 return parent(loader);
4730 }
4731 return loader;
4732 }
4733
4734 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4735 assert(is_instance(loader), "loader must be oop");
4736 return loader->obj_field(_unnamedModule_offset);
4737 }
4738
4739 // Support for java_lang_System
4740 //
4741
4742 int java_lang_System::_static_in_offset;
4743 int java_lang_System::_static_out_offset;
4744 int java_lang_System::_static_err_offset;
4745 int java_lang_System::_static_security_offset;
4746 int java_lang_System::_static_allow_security_offset;
4747 int java_lang_System::_static_never_offset;
4748
4749 #define SYSTEM_FIELDS_DO(macro) \
4750 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4751 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4752 macro(_static_err_offset, k, "err", print_stream_signature, true); \
4753 macro(_static_security_offset, k, "security", security_manager_signature, true); \
4754 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4755 macro(_static_never_offset, k, "NEVER", int_signature, true)
4756
4757 void java_lang_System::compute_offsets() {
4758 InstanceKlass* k = vmClasses::System_klass();
4759 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4760 }
4761
4762 // This field tells us that a security manager can never be installed so we
4763 // can completely skip populating the ProtectionDomainCacheTable.
4764 bool java_lang_System::allow_security_manager() {
4765 static int initialized = false;
4766 static bool allowed = true; // default
4767 if (!initialized) {
4768 oop base = vmClasses::System_klass()->static_field_base_raw();
4769 int never = base->int_field(_static_never_offset);
4770 allowed = (base->int_field(_static_allow_security_offset) != never);
4771 initialized = true;
4772 }
4773 return allowed;
4774 }
4775
4776 // This field tells us that a security manager is installed.
4777 bool java_lang_System::has_security_manager() {
4778 oop base = vmClasses::System_klass()->static_field_base_raw();
4779 return base->obj_field(_static_security_offset) != nullptr;
4780 }
4781
4782 #if INCLUDE_CDS
4783 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4784 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4785 }
4786 #endif
4787
4788 // Support for jdk_internal_misc_UnsafeConstants
4789 //
4790 class UnsafeConstantsFixup : public FieldClosure {
4791 private:
4792 int _address_size;
4793 int _page_size;
4794 bool _big_endian;
4795 bool _use_unaligned_access;
4796 int _data_cache_line_flush_size;
4797 public:
4798 UnsafeConstantsFixup() {
4799 // round up values for all static final fields
4800 _address_size = sizeof(void*);
4801 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4802 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4803 _use_unaligned_access = UseUnalignedAccesses;
4804 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4805 }
4806
4807 void do_field(fieldDescriptor* fd) {
4808 oop mirror = fd->field_holder()->java_mirror();
4809 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4810 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4811 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4812 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4813 if (fd->name() == vmSymbols::address_size_name()) {
4814 mirror->int_field_put(fd->offset(), _address_size);
4815 } else if (fd->name() == vmSymbols::page_size_name()) {
4816 mirror->int_field_put(fd->offset(), _page_size);
4817 } else if (fd->name() == vmSymbols::big_endian_name()) {
4818 mirror->bool_field_put(fd->offset(), _big_endian);
4819 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4820 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4821 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4822 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4823 } else {
4824 assert(false, "unexpected UnsafeConstants field");
4825 }
4826 }
4827 };
4828
4829 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4830 UnsafeConstantsFixup fixup;
4831 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4832 }
4833
4834
4835 // java_lang_StackTraceElement
4836
4837 int java_lang_StackTraceElement::_methodName_offset;
4838 int java_lang_StackTraceElement::_fileName_offset;
4839 int java_lang_StackTraceElement::_lineNumber_offset;
4840 int java_lang_StackTraceElement::_moduleName_offset;
4841 int java_lang_StackTraceElement::_moduleVersion_offset;
4842 int java_lang_StackTraceElement::_classLoaderName_offset;
4843 int java_lang_StackTraceElement::_declaringClass_offset;
4844 int java_lang_StackTraceElement::_declaringClassObject_offset;
4845
4846 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4847 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4848 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4849 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4850 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4851 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4852 macro(_methodName_offset, k, "methodName", string_signature, false); \
4853 macro(_fileName_offset, k, "fileName", string_signature, false); \
4854 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4855
4856 // Support for java_lang_StackTraceElement
4857 void java_lang_StackTraceElement::compute_offsets() {
4858 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4859 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4860 }
4861
4862 #if INCLUDE_CDS
4863 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4864 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4865 }
4866 #endif
4867
4868 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4869 element->obj_field_put(_fileName_offset, value);
4870 }
4871
4872 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4873 element->obj_field_put(_declaringClass_offset, value);
4874 }
4875
4876 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4877 element->obj_field_put(_methodName_offset, value);
4878 }
4879
4880 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4881 element->int_field_put(_lineNumber_offset, value);
4882 }
4883
4884 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4885 element->obj_field_put(_moduleName_offset, value);
4886 }
4887
4888 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4889 element->obj_field_put(_moduleVersion_offset, value);
4890 }
4891
4892 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4893 element->obj_field_put(_classLoaderName_offset, value);
4894 }
4895
4896 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4897 element->obj_field_put(_declaringClassObject_offset, value);
4898 }
4899
4900
4901 // java_lang_AssertionStatusDirectives
4902
4903 int java_lang_AssertionStatusDirectives::_classes_offset;
4904 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4905 int java_lang_AssertionStatusDirectives::_packages_offset;
4906 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4907 int java_lang_AssertionStatusDirectives::_deflt_offset;
4908
4909 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4910 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4911 macro(_classes_offset, k, "classes", string_array_signature, false); \
4912 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4913 macro(_packages_offset, k, "packages", string_array_signature, false); \
4914 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4915 macro(_deflt_offset, k, "deflt", bool_signature, false)
4916
4917 void java_lang_AssertionStatusDirectives::compute_offsets() {
4918 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4919 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4920 }
4921
4922 #if INCLUDE_CDS
4923 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4924 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4925 }
4926 #endif
4927
4928 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4929 o->obj_field_put(_classes_offset, val);
4930 }
4931
4932 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4933 o->obj_field_put(_classEnabled_offset, val);
4934 }
4935
4936 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4937 o->obj_field_put(_packages_offset, val);
4938 }
4939
4940 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4941 o->obj_field_put(_packageEnabled_offset, val);
4942 }
4943
4944 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4945 o->bool_field_put(_deflt_offset, val);
4946 }
4947
4948 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4949
4950 #define AOS_FIELDS_DO(macro) \
4951 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4952
4953 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4954 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4955 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4956 }
4957
4958 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4959 assert(_owner_offset != 0, "Must be initialized");
4960 return obj->obj_field(_owner_offset);
4961 }
4962
4963 #if INCLUDE_CDS
4964 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4965 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4966 }
4967 #endif
4968
4969 int vector_VectorPayload::_payload_offset;
4970
4971 #define VECTORPAYLOAD_FIELDS_DO(macro) \
4972 macro(_payload_offset, k, "payload", object_signature, false)
4973
4974 void vector_VectorPayload::compute_offsets() {
4975 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
4976 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4977 }
4978
4979 #if INCLUDE_CDS
4980 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
4981 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4982 }
4983 #endif
4984
4985 void vector_VectorPayload::set_payload(oop o, oop val) {
4986 o->obj_field_put(_payload_offset, val);
4987 }
4988
4989 bool vector_VectorPayload::is_instance(oop obj) {
4990 return obj != nullptr && is_subclass(obj->klass());
4991 }
4992
4993 int java_lang_Integer_IntegerCache::_static_cache_offset;
4994 int java_lang_Long_LongCache::_static_cache_offset;
4995 int java_lang_Character_CharacterCache::_static_cache_offset;
4996 int java_lang_Short_ShortCache::_static_cache_offset;
4997 int java_lang_Byte_ByteCache::_static_cache_offset;
4998
4999 #define INTEGER_CACHE_FIELDS_DO(macro) \
5000 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5001
5002 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5003 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5004 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5005 }
5006
5007 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5008 oop base = ik->static_field_base_raw();
5009 return objArrayOop(base->obj_field(_static_cache_offset));
5010 }
5011
5012 Symbol* java_lang_Integer_IntegerCache::symbol() {
5013 return vmSymbols::java_lang_Integer_IntegerCache();
5014 }
5015
5016 #if INCLUDE_CDS
5017 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5018 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5019 }
5020 #endif
5021 #undef INTEGER_CACHE_FIELDS_DO
5022
5023 jint java_lang_Integer::value(oop obj) {
5024 jvalue v;
5025 java_lang_boxing_object::get_value(obj, &v);
5026 return v.i;
5027 }
5028
5029 #define LONG_CACHE_FIELDS_DO(macro) \
5030 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5031
5032 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5033 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5034 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5035 }
5036
5037 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5038 oop base = ik->static_field_base_raw();
5039 return objArrayOop(base->obj_field(_static_cache_offset));
5040 }
5041
5042 Symbol* java_lang_Long_LongCache::symbol() {
5043 return vmSymbols::java_lang_Long_LongCache();
5044 }
5045
5046 #if INCLUDE_CDS
5047 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5048 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5049 }
5050 #endif
5051 #undef LONG_CACHE_FIELDS_DO
5052
5053 jlong java_lang_Long::value(oop obj) {
5054 jvalue v;
5055 java_lang_boxing_object::get_value(obj, &v);
5056 return v.j;
5057 }
5058
5059 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5060 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5061
5062 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5063 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5064 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5065 }
5066
5067 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5068 oop base = ik->static_field_base_raw();
5069 return objArrayOop(base->obj_field(_static_cache_offset));
5070 }
5071
5072 Symbol* java_lang_Character_CharacterCache::symbol() {
5073 return vmSymbols::java_lang_Character_CharacterCache();
5074 }
5075
5076 #if INCLUDE_CDS
5077 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5078 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5079 }
5080 #endif
5081 #undef CHARACTER_CACHE_FIELDS_DO
5082
5083 jchar java_lang_Character::value(oop obj) {
5084 jvalue v;
5085 java_lang_boxing_object::get_value(obj, &v);
5086 return v.c;
5087 }
5088
5089 #define SHORT_CACHE_FIELDS_DO(macro) \
5090 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5091
5092 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5093 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5094 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5095 }
5096
5097 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5098 oop base = ik->static_field_base_raw();
5099 return objArrayOop(base->obj_field(_static_cache_offset));
5100 }
5101
5102 Symbol* java_lang_Short_ShortCache::symbol() {
5103 return vmSymbols::java_lang_Short_ShortCache();
5104 }
5105
5106 #if INCLUDE_CDS
5107 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5108 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5109 }
5110 #endif
5111 #undef SHORT_CACHE_FIELDS_DO
5112
5113 jshort java_lang_Short::value(oop obj) {
5114 jvalue v;
5115 java_lang_boxing_object::get_value(obj, &v);
5116 return v.s;
5117 }
5118
5119 #define BYTE_CACHE_FIELDS_DO(macro) \
5120 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5121
5122 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5123 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5124 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5125 }
5126
5127 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5128 oop base = ik->static_field_base_raw();
5129 return objArrayOop(base->obj_field(_static_cache_offset));
5130 }
5131
5132 Symbol* java_lang_Byte_ByteCache::symbol() {
5133 return vmSymbols::java_lang_Byte_ByteCache();
5134 }
5135
5136 #if INCLUDE_CDS
5137 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5138 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5139 }
5140 #endif
5141 #undef BYTE_CACHE_FIELDS_DO
5142
5143 jbyte java_lang_Byte::value(oop obj) {
5144 jvalue v;
5145 java_lang_boxing_object::get_value(obj, &v);
5146 return v.b;
5147 }
5148
5149 int java_lang_Boolean::_static_TRUE_offset;
5150 int java_lang_Boolean::_static_FALSE_offset;
5151
5152 #define BOOLEAN_FIELDS_DO(macro) \
5153 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5154 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5155
5156
5157 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5158 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5159 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5160 }
5161
5162 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5163 oop base = ik->static_field_base_raw();
5164 return base->obj_field(_static_TRUE_offset);
5165 }
5166
5167 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5168 oop base = ik->static_field_base_raw();
5169 return base->obj_field(_static_FALSE_offset);
5170 }
5171
5172 Symbol* java_lang_Boolean::symbol() {
5173 return vmSymbols::java_lang_Boolean();
5174 }
5175
5176 #if INCLUDE_CDS
5177 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5178 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5179 }
5180 #endif
5181 #undef BOOLEAN_CACHE_FIELDS_DO
5182
5183 jboolean java_lang_Boolean::value(oop obj) {
5184 jvalue v;
5185 java_lang_boxing_object::get_value(obj, &v);
5186 return v.z;
5187 }
5188
5189 // java_lang_reflect_RecordComponent
5190
5191 int java_lang_reflect_RecordComponent::_clazz_offset;
5192 int java_lang_reflect_RecordComponent::_name_offset;
5193 int java_lang_reflect_RecordComponent::_type_offset;
5194 int java_lang_reflect_RecordComponent::_accessor_offset;
5195 int java_lang_reflect_RecordComponent::_signature_offset;
5196 int java_lang_reflect_RecordComponent::_annotations_offset;
5197 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5198
5199 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5200 macro(_clazz_offset, k, "clazz", class_signature, false); \
5201 macro(_name_offset, k, "name", string_signature, false); \
5202 macro(_type_offset, k, "type", class_signature, false); \
5203 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5204 macro(_signature_offset, k, "signature", string_signature, false); \
5205 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5206 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5207
5208 // Support for java_lang_reflect_RecordComponent
5209 void java_lang_reflect_RecordComponent::compute_offsets() {
5210 InstanceKlass* k = vmClasses::RecordComponent_klass();
5211 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5212 }
5213
5214 #if INCLUDE_CDS
5215 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5216 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5217 }
5218 #endif
5219
5220 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5221 element->obj_field_put(_clazz_offset, value);
5222 }
5223
5224 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5225 element->obj_field_put(_name_offset, value);
5226 }
5227
5228 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5229 element->obj_field_put(_type_offset, value);
5230 }
5231
5232 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5233 element->obj_field_put(_accessor_offset, value);
5234 }
5235
5236 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5237 element->obj_field_put(_signature_offset, value);
5238 }
5239
5240 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5241 element->obj_field_put(_annotations_offset, value);
5242 }
5243
5244 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5245 element->obj_field_put(_typeAnnotations_offset, value);
5246 }
5247
5248 // java_lang_InternalError
5249 int java_lang_InternalError::_during_unsafe_access_offset;
5250
5251 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5252 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5253 }
5254
5255 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5256 return internal_error->bool_field(_during_unsafe_access_offset);
5257 }
5258
5259 void java_lang_InternalError::compute_offsets() {
5260 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5261 }
5262
5263 #if INCLUDE_CDS
5264 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5265 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5266 }
5267 #endif
5268
5269 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5270 f(java_lang_Class) \
5271 f(java_lang_String) \
5272 f(java_lang_ref_Reference) \
5273 //end
5274
5275 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5276 f(java_lang_System) \
5277 f(java_lang_ClassLoader) \
5278 f(java_lang_Throwable) \
5279 f(java_lang_Thread) \
5280 f(java_lang_Thread_FieldHolder) \
5281 f(java_lang_Thread_Constants) \
5282 f(java_lang_ThreadGroup) \
5283 f(java_lang_VirtualThread) \
5284 f(java_lang_InternalError) \
5285 f(java_lang_AssertionStatusDirectives) \
5286 f(java_lang_ref_SoftReference) \
5287 f(java_lang_invoke_MethodHandle) \
5288 f(java_lang_invoke_DirectMethodHandle) \
5289 f(java_lang_invoke_MemberName) \
5290 f(java_lang_invoke_ResolvedMethodName) \
5291 f(java_lang_invoke_LambdaForm) \
5292 f(java_lang_invoke_MethodType) \
5293 f(java_lang_invoke_CallSite) \
5294 f(java_lang_invoke_ConstantCallSite) \
5295 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5296 f(java_security_AccessControlContext) \
5297 f(java_lang_reflect_AccessibleObject) \
5298 f(java_lang_reflect_Method) \
5299 f(java_lang_reflect_Constructor) \
5300 f(java_lang_reflect_Field) \
5301 f(java_lang_reflect_RecordComponent) \
5302 f(reflect_ConstantPool) \
5303 f(java_lang_reflect_Parameter) \
5304 f(java_lang_Module) \
5305 f(java_lang_StackTraceElement) \
5306 f(java_lang_ClassFrameInfo) \
5307 f(java_lang_StackFrameInfo) \
5308 f(java_lang_LiveStackFrameInfo) \
5309 f(jdk_internal_vm_ContinuationScope) \
5310 f(jdk_internal_vm_Continuation) \
5311 f(jdk_internal_vm_StackChunk) \
5312 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5313 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5314 f(jdk_internal_foreign_abi_ABIDescriptor) \
5315 f(jdk_internal_foreign_abi_VMStorage) \
5316 f(jdk_internal_foreign_abi_CallConv) \
5317 f(jdk_internal_misc_UnsafeConstants) \
5318 f(java_lang_boxing_object) \
5319 f(vector_VectorPayload) \
5320 //end
5321
5322 #define BASIC_JAVA_CLASSES_DO(f) \
5323 BASIC_JAVA_CLASSES_DO_PART1(f) \
5324 BASIC_JAVA_CLASSES_DO_PART2(f)
5325
5326 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5327
5328 // Compute field offsets of all the classes in this file
5329 void JavaClasses::compute_offsets() {
5330 if (UseSharedSpaces) {
5331 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5332 JvmtiExport::has_early_class_hook_env()),
5333 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5334 // None of the classes used by the rest of this function can be replaced by
5335 // JVMTI ClassFileLoadHook.
5336 // We are safe to use the archived offsets, which have already been restored
5337 // by JavaClasses::serialize_offsets, without computing the offsets again.
5338 return;
5339 }
5340
5341 // We have already called the compute_offsets() of the
5342 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5343 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5344 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5345 }
5346
5347 #if INCLUDE_CDS
5348 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5349
5350 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5351 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5352 }
5353 #endif
5354
5355 #if INCLUDE_CDS_JAVA_HEAP
5356 bool JavaClasses::is_supported_for_archiving(oop obj) {
5357 Klass* klass = obj->klass();
5358
5359 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed.
5360 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5361 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5362 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5363 // So for now we cannot not support these classes for archiving.
5364 //
5365 // These objects typically are not referenced by static fields, but rather by resolved
5366 // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5367 klass == vmClasses::ResolvedMethodName_klass() ||
5368 klass == vmClasses::MemberName_klass() ||
5369 klass == vmClasses::Context_klass() ||
5370 // It's problematic to archive Reference objects. One of the reasons is that
5371 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5372 klass->is_subclass_of(vmClasses::Reference_klass())) {
5373 return false;
5374 }
5375
5376 return true;
5377 }
5378 #endif
5379
5380 #ifndef PRODUCT
5381
5382 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5383
5384 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5385 const char* field_sig) {
5386 EXCEPTION_MARK;
5387 fieldDescriptor fd;
5388 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5389 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5390 InstanceKlass* ik = InstanceKlass::cast(k);
5391 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5392 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5393 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5394 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5395 return false;
5396 }
5397 if (fd.is_static()) {
5398 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5399 return false;
5400 }
5401 if (fd.offset() == deserialized_offset ) {
5402 return true;
5403 } else {
5404 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5405 klass_name, field_name, deserialized_offset, fd.offset());
5406 return false;
5407 }
5408 }
5409
5410 void JavaClasses::check_offsets() {
5411 bool valid = true;
5412
5413 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5414 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5415
5416 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5417 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5418
5419 // Boxed primitive objects (java_lang_boxing_object)
5420
5421 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5422 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5423 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5424 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5425 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5426 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5427 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5428 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5429
5430 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5431 }
5432
5433 #endif // PRODUCT
5434
5435 int InjectedField::compute_offset() {
5436 InstanceKlass* ik = InstanceKlass::cast(klass());
5437 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5438 if (!may_be_java && !fs.field_flags().is_injected()) {
5439 // Only look at injected fields
5440 continue;
5441 }
5442 if (fs.name() == name() && fs.signature() == signature()) {
5443 return fs.offset();
5444 }
5445 }
5446 ResourceMark rm;
5447 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)" : "");
5448 #ifndef PRODUCT
5449 ik->print();
5450 tty->print_cr("all fields:");
5451 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5452 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5453 }
5454 #endif //PRODUCT
5455 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5456 return -1;
5457 }
5458
5459 void javaClasses_init() {
5460 JavaClasses::compute_offsets();
5461 JavaClasses::check_offsets();
5462 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5463 }