1 /*
2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/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/flatArrayKlass.hpp"
57 #include "oops/inlineKlass.inline.hpp"
58 #include "oops/instanceKlass.inline.hpp"
59 #include "oops/instanceMirrorKlass.inline.hpp"
60 #include "oops/klass.hpp"
61 #include "oops/klass.inline.hpp"
62 #include "oops/method.inline.hpp"
63 #include "oops/objArrayKlass.hpp"
64 #include "oops/objArrayOop.inline.hpp"
65 #include "oops/oopCast.inline.hpp"
66 #include "oops/oop.inline.hpp"
67 #include "oops/symbol.hpp"
68 #include "oops/recordComponent.hpp"
69 #include "oops/typeArrayOop.inline.hpp"
70 #include "prims/jvmtiExport.hpp"
71 #include "prims/methodHandles.hpp"
72 #include "prims/resolvedMethodTable.hpp"
73 #include "runtime/continuationEntry.inline.hpp"
74 #include "runtime/continuationJavaClasses.inline.hpp"
75 #include "runtime/fieldDescriptor.inline.hpp"
76 #include "runtime/frame.inline.hpp"
77 #include "runtime/handles.inline.hpp"
78 #include "runtime/handshake.hpp"
79 #include "runtime/init.hpp"
80 #include "runtime/interfaceSupport.inline.hpp"
81 #include "runtime/java.hpp"
82 #include "runtime/javaCalls.hpp"
83 #include "runtime/javaThread.hpp"
84 #include "runtime/jniHandles.inline.hpp"
85 #include "runtime/reflectionUtils.hpp"
86 #include "runtime/safepoint.hpp"
87 #include "runtime/safepointVerifiers.hpp"
88 #include "runtime/threadSMR.hpp"
89 #include "runtime/vframe.inline.hpp"
90 #include "runtime/vm_version.hpp"
91 #include "utilities/align.hpp"
92 #include "utilities/globalDefinitions.hpp"
93 #include "utilities/growableArray.hpp"
94 #include "utilities/preserveException.hpp"
95 #include "utilities/utf8.hpp"
96 #if INCLUDE_JVMCI
97 #include "jvmci/jvmciJavaClasses.hpp"
98 #endif
99
100 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
101 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
102
103 InjectedField JavaClasses::_injected_fields[] = {
104 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
105 };
106
107 // Register native methods of Object
108 void java_lang_Object::register_natives(TRAPS) {
109 InstanceKlass* obj = vmClasses::Object_klass();
110 Method::register_native(obj, vmSymbols::hashCode_name(),
111 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
112 Method::register_native(obj, vmSymbols::wait_name(),
113 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
114 Method::register_native(obj, vmSymbols::notify_name(),
115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
116 Method::register_native(obj, vmSymbols::notifyAll_name(),
117 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
118 Method::register_native(obj, vmSymbols::clone_name(),
119 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
120 }
121
122 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
123 return _injected_fields[(int)id].compute_offset();
124 }
125
126 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
127 *field_count = 0;
128
129 vmSymbolID sid = vmSymbols::find_sid(class_name);
130 if (sid == vmSymbolID::NO_SID) {
131 // Only well known classes can inject fields
132 return nullptr;
133 }
134
135 int count = 0;
136 int start = -1;
137
138 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
139 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
140 count++; \
141 if (start == -1) { \
142 start = (int)InjectedFieldID::klass##_##name##_enum; \
143 } \
144 }
145 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
146 #undef LOOKUP_INJECTED_FIELD
147
148 if (start != -1) {
149 *field_count = count;
150 return _injected_fields + start;
151 }
152 return nullptr;
153 }
154
155
156 // Helpful routine for computing field offsets at run time rather than hardcoding them
157 // Finds local fields only, including static fields. Static field offsets are from the
158 // beginning of the mirror.
159 void JavaClasses::compute_offset(int &dest_offset,
160 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
161 bool is_static) {
162 fieldDescriptor fd;
163 if (ik == nullptr) {
164 ResourceMark rm;
165 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
166 vm_exit_during_initialization("Invalid layout of well-known class");
167 }
168
169 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
170 ResourceMark rm;
171 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
172 name_symbol->as_C_string(), signature_symbol->as_C_string());
173 #ifndef PRODUCT
174 // Prints all fields and offsets
175 Log(class) lt;
176 LogStream ls(lt.error());
177 ik->print_on(&ls);
178 #endif //PRODUCT
179 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
180 }
181 dest_offset = fd.offset();
182 }
183
184 // Overloading to pass name as a string.
185 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
186 const char* name_string, Symbol* signature_symbol,
187 bool is_static) {
188 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
189 if (name == nullptr) {
190 ResourceMark rm;
191 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
192 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
193 }
194 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
195 }
196
197 // java_lang_String
198
199 int java_lang_String::_value_offset;
200 int java_lang_String::_hash_offset;
201 int java_lang_String::_hashIsZero_offset;
202 int java_lang_String::_coder_offset;
203 int java_lang_String::_flags_offset;
204
205 bool java_lang_String::_initialized;
206
207
208 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
209 uint8_t* addr = flags_addr(java_string);
210 uint8_t value = Atomic::load(addr);
211 while ((value & flag_mask) == 0) {
212 uint8_t old_value = value;
213 value |= flag_mask;
214 value = Atomic::cmpxchg(addr, old_value, value);
215 if (value == old_value) return false; // Flag bit changed from 0 to 1.
216 }
217 return true; // Flag bit is already 1.
218 }
219
220 #define STRING_FIELDS_DO(macro) \
221 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
222 macro(_hash_offset, k, "hash", int_signature, false); \
223 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
224 macro(_coder_offset, k, "coder", byte_signature, false);
225
226 void java_lang_String::compute_offsets() {
227 if (_initialized) {
228 return;
229 }
230
231 InstanceKlass* k = vmClasses::String_klass();
232 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
233 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
234
235 _initialized = true;
236 }
237
238 #if INCLUDE_CDS
239 void java_lang_String::serialize_offsets(SerializeClosure* f) {
240 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
241 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
242 f->do_bool(&_initialized);
243 }
244 #endif
245
246 class CompactStringsFixup : public FieldClosure {
247 private:
248 bool _value;
249
250 public:
251 CompactStringsFixup(bool value) : _value(value) {}
252
253 void do_field(fieldDescriptor* fd) {
254 if (fd->name() == vmSymbols::compact_strings_name()) {
255 oop mirror = fd->field_holder()->java_mirror();
256 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
257 assert(mirror != nullptr, "String must have mirror already");
258 mirror->bool_field_put(fd->offset(), _value);
259 }
260 }
261 };
262
263 void java_lang_String::set_compact_strings(bool value) {
264 CompactStringsFixup fix(value);
265 vmClasses::String_klass()->do_local_static_fields(&fix);
266 }
267
268 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
269 assert(_initialized, "Must be initialized");
270 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
271
272 // Create the String object first, so there's a chance that the String
273 // and the char array it points to end up in the same cache line.
274 oop obj;
275 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
276
277 // Create the char array. The String object must be handlized here
278 // because GC can happen as a result of the allocation attempt.
279 Handle h_obj(THREAD, obj);
280 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
281 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
282
283 // Point the String at the char array
284 obj = h_obj();
285 set_value(obj, buffer);
286 // No need to zero the offset, allocation zero'ed the entire String object
287 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
288 return h_obj;
289 }
290
291 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
292 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
293 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
294 typeArrayOop buffer = value(h_obj());
295 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
296 if (is_latin1) {
297 for (int index = 0; index < length; index++) {
298 buffer->byte_at_put(index, (jbyte)unicode[index]);
299 }
300 } else {
301 for (int index = 0; index < length; index++) {
302 buffer->char_at_put(index, unicode[index]);
303 }
304 }
305
306 #ifdef ASSERT
307 {
308 ResourceMark rm;
309 size_t utf8_len = static_cast<size_t>(length);
310 char* expected = UNICODE::as_utf8(unicode, utf8_len);
311 char* actual = as_utf8_string(h_obj());
312 if (strcmp(expected, actual) != 0) {
313 fatal("Unicode conversion failure: %s --> %s", expected, actual);
314 }
315 }
316 #endif
317
318 return h_obj;
319 }
320
321 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
322 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
323 return h_obj();
324 }
325
326 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
327 if (utf8_str == nullptr) {
328 return Handle();
329 }
330 bool has_multibyte, is_latin1;
331 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
332 if (!CompactStrings) {
333 has_multibyte = true;
334 is_latin1 = false;
335 }
336
337 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
338 if (length > 0) {
339 if (!has_multibyte) {
340 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
341 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
342 } else if (is_latin1) {
343 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
344 } else {
345 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
346 }
347 }
348
349 #ifdef ASSERT
350 // This check is too strict when the input string is not a valid UTF8.
351 // For example, it may be created with arbitrary content via jni_NewStringUTF.
352 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), false)) {
353 ResourceMark rm;
354 const char* expected = utf8_str;
355 char* actual = as_utf8_string(h_obj());
356 if (strcmp(expected, actual) != 0) {
357 fatal("String conversion failure: %s --> %s", expected, actual);
358 }
359 }
360 #endif
361
362 return h_obj;
363 }
364
365 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
366 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
367 return h_obj();
368 }
369
370 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
371 const char* utf8_str = (char*)symbol->bytes();
372 int utf8_len = symbol->utf8_length();
373
374 bool has_multibyte, is_latin1;
375 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
376 if (!CompactStrings) {
377 has_multibyte = true;
378 is_latin1 = false;
379 }
380
381 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
382 if (length > 0) {
383 if (!has_multibyte) {
384 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
385 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
386 } else if (is_latin1) {
387 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
388 } else {
389 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
390 }
391 }
392
393 #ifdef ASSERT
394 {
395 ResourceMark rm;
396 const char* expected = symbol->as_utf8();
397 char* actual = as_utf8_string(h_obj());
398 if (strncmp(expected, actual, utf8_len) != 0) {
399 fatal("Symbol conversion failure: %s --> %s", expected, actual);
400 }
401 }
402 #endif
403
404 return h_obj;
405 }
406
407 // Converts a C string to a Java String based on current encoding
408 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
409 assert(str != nullptr, "bad arguments");
410
411 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
412 static to_java_string_fn_t _to_java_string_fn = nullptr;
413
414 if (_to_java_string_fn == nullptr) {
415 void *lib_handle = os::native_java_library();
416 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
417 #if defined(_WIN32) && !defined(_WIN64)
418 if (_to_java_string_fn == nullptr) {
419 // On 32 bit Windows, also try __stdcall decorated name
420 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
421 }
422 #endif
423 if (_to_java_string_fn == nullptr) {
424 fatal("JNU_NewStringPlatform missing");
425 }
426 }
427
428 jstring js = nullptr;
429 {
430 JavaThread* thread = THREAD;
431 HandleMark hm(thread);
432 ThreadToNativeFromVM ttn(thread);
433 js = (_to_java_string_fn)(thread->jni_environment(), str);
434 }
435
436 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
437 JNIHandles::destroy_local(js); // destroy local JNIHandle.
438 return native_platform_string;
439 }
440
441 // Converts a Java String to a native C string that can be used for
442 // native OS calls.
443 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
444 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
445 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
446
447 if (_to_platform_string_fn == nullptr) {
448 void *lib_handle = os::native_java_library();
449 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
450 if (_to_platform_string_fn == nullptr) {
451 fatal("GetStringPlatformChars missing");
452 }
453 }
454
455 char *native_platform_string;
456 jstring js;
457 { JavaThread* thread = THREAD;
458 js = (jstring) JNIHandles::make_local(thread, java_string());
459 HandleMark hm(thread);
460 ThreadToNativeFromVM ttn(thread);
461 JNIEnv *env = thread->jni_environment();
462 bool is_copy;
463 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
464 assert(is_copy == JNI_TRUE, "is_copy value changed");
465 }
466
467 // Uses a store barrier and therefore needs to be in vm state
468 JNIHandles::destroy_local(js);
469
470 return native_platform_string;
471 }
472
473 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
474 ResourceMark rm(THREAD);
475 return create_from_str(java_name->as_klass_external_name(), THREAD);
476 }
477
478 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
479 jchar* result = as_unicode_string_or_null(java_string, length);
480 if (result == nullptr) {
481 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
482 }
483 return result;
484 }
485
486 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
487 typeArrayOop value = java_lang_String::value(java_string);
488 length = java_lang_String::length(java_string, value);
489 bool is_latin1 = java_lang_String::is_latin1(java_string);
490
491 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
492 if (result != nullptr) {
493 if (!is_latin1) {
494 for (int index = 0; index < length; index++) {
495 result[index] = value->char_at(index);
496 }
497 } else {
498 for (int index = 0; index < length; index++) {
499 result[index] = ((jchar) value->byte_at(index)) & 0xff;
500 }
501 }
502 }
503 return result;
504 }
505
506 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
507 // The hash and hashIsZero fields are subject to a benign data race,
508 // making it crucial to ensure that any observable result of the
509 // calculation in this method stays correct under any possible read of
510 // these fields. Necessary restrictions to allow this to be correct
511 // without explicit memory fences or similar concurrency primitives is
512 // that we can ever only write to one of these two fields for a given
513 // String instance, and that the computation is idempotent and derived
514 // from immutable state
515 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
516 if (java_lang_String::hash_is_set(java_string)) {
517 return java_string->int_field(_hash_offset);
518 }
519
520 typeArrayOop value = java_lang_String::value(java_string);
521 int length = java_lang_String::length(java_string, value);
522 bool is_latin1 = java_lang_String::is_latin1(java_string);
523
524 unsigned int hash = 0;
525 if (length > 0) {
526 if (is_latin1) {
527 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
528 } else {
529 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
530 }
531 }
532
533 if (update) {
534 if (hash != 0) {
535 java_string->int_field_put(_hash_offset, hash);
536 } else {
537 java_string->bool_field_put(_hashIsZero_offset, true);
538 }
539 }
540 return hash;
541 }
542
543 unsigned int java_lang_String::hash_code(oop java_string) {
544 return hash_code_impl(java_string, /*update=*/true);
545 }
546
547 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
548 return hash_code_impl(java_string, /*update=*/false);
549 }
550
551
552 char* java_lang_String::as_quoted_ascii(oop java_string) {
553 typeArrayOop value = java_lang_String::value(java_string);
554 int length = java_lang_String::length(java_string, value);
555 bool is_latin1 = java_lang_String::is_latin1(java_string);
556
557 if (length == 0) return nullptr;
558
559 char* result;
560 size_t result_length;
561 if (!is_latin1) {
562 jchar* base = value->char_at_addr(0);
563 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
564 result = NEW_RESOURCE_ARRAY(char, result_length);
565 UNICODE::as_quoted_ascii(base, length, result, result_length);
566 } else {
567 jbyte* base = value->byte_at_addr(0);
568 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
569 result = NEW_RESOURCE_ARRAY(char, result_length);
570 UNICODE::as_quoted_ascii(base, length, result, result_length);
571 }
572 assert(result_length >= (size_t)length + 1, "must not be shorter");
573 assert(result_length == strlen(result) + 1, "must match");
574 return result;
575 }
576
577 Symbol* java_lang_String::as_symbol(oop java_string) {
578 typeArrayOop value = java_lang_String::value(java_string);
579 int length = java_lang_String::length(java_string, value);
580 bool is_latin1 = java_lang_String::is_latin1(java_string);
581 if (!is_latin1) {
582 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
583 Symbol* sym = SymbolTable::new_symbol(base, length);
584 return sym;
585 } else {
586 ResourceMark rm;
587 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
588 size_t utf8_len = static_cast<size_t>(length);
589 const char* base = UNICODE::as_utf8(position, utf8_len);
590 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
591 return sym;
592 }
593 }
594
595 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
596 typeArrayOop value = java_lang_String::value(java_string);
597 int length = java_lang_String::length(java_string, value);
598 bool is_latin1 = java_lang_String::is_latin1(java_string);
599 if (!is_latin1) {
600 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
601 return SymbolTable::probe_unicode(base, length);
602 } else {
603 ResourceMark rm;
604 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
605 size_t utf8_len = static_cast<size_t>(length);
606 const char* base = UNICODE::as_utf8(position, utf8_len);
607 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
608 }
609 }
610
611 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
612 assert(value_equals(value, java_lang_String::value(java_string)),
613 "value must be same as java_lang_String::value(java_string)");
614 int length = java_lang_String::length(java_string, value);
615 if (length == 0) {
616 return 0;
617 }
618 if (!java_lang_String::is_latin1(java_string)) {
619 return UNICODE::utf8_length(value->char_at_addr(0), length);
620 } else {
621 return UNICODE::utf8_length(value->byte_at_addr(0), length);
622 }
623 }
624
625 size_t java_lang_String::utf8_length(oop java_string) {
626 typeArrayOop value = java_lang_String::value(java_string);
627 return utf8_length(java_string, value);
628 }
629
630 int java_lang_String::utf8_length_as_int(oop java_string) {
631 typeArrayOop value = java_lang_String::value(java_string);
632 return utf8_length_as_int(java_string, value);
633 }
634
635 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
636 assert(value_equals(value, java_lang_String::value(java_string)),
637 "value must be same as java_lang_String::value(java_string)");
638 int length = java_lang_String::length(java_string, value);
639 if (length == 0) {
640 return 0;
641 }
642 if (!java_lang_String::is_latin1(java_string)) {
643 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
644 } else {
645 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
646 }
647 }
648
649 char* java_lang_String::as_utf8_string(oop java_string) {
650 size_t length;
651 return as_utf8_string(java_string, length);
652 }
653
654 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
655 typeArrayOop value = java_lang_String::value(java_string);
656 // `length` is used as the incoming number of characters to
657 // convert, and then set as the number of bytes in the UTF8 sequence.
658 length = java_lang_String::length(java_string, value);
659 bool is_latin1 = java_lang_String::is_latin1(java_string);
660 if (!is_latin1) {
661 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
662 return UNICODE::as_utf8(position, length);
663 } else {
664 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
665 return UNICODE::as_utf8(position, length);
666 }
667 }
668
669 // Uses a provided buffer if it's sufficiently large, otherwise allocates
670 // a resource array to fit
671 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
672 typeArrayOop value = java_lang_String::value(java_string);
673 int len = java_lang_String::length(java_string, value);
674 bool is_latin1 = java_lang_String::is_latin1(java_string);
675 if (!is_latin1) {
676 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
677 utf8_len = UNICODE::utf8_length(position, len);
678 if (utf8_len >= buflen) {
679 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
680 }
681 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
682 } else {
683 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
684 utf8_len = UNICODE::utf8_length(position, len);
685 if (utf8_len >= buflen) {
686 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
687 }
688 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
689 }
690 }
691
692 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
693 assert(value_equals(value, java_lang_String::value(java_string)),
694 "value must be same as java_lang_String::value(java_string)");
695 int length = java_lang_String::length(java_string, value);
696 bool is_latin1 = java_lang_String::is_latin1(java_string);
697 if (!is_latin1) {
698 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
699 return UNICODE::as_utf8(position, length, buf, buflen);
700 } else {
701 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
702 return UNICODE::as_utf8(position, length, buf, buflen);
703 }
704 }
705
706 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
707 typeArrayOop value = java_lang_String::value(java_string);
708 return as_utf8_string(java_string, value, buf, buflen);
709 }
710
711 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
712 // `length` is used as the incoming number of characters to
713 // convert, and then set as the number of bytes in the UTF8 sequence.
714 size_t length = static_cast<size_t>(len);
715 typeArrayOop value = java_lang_String::value(java_string);
716 bool is_latin1 = java_lang_String::is_latin1(java_string);
717 assert(start + len <= java_lang_String::length(java_string), "just checking");
718 if (!is_latin1) {
719 jchar* position = value->char_at_addr(start);
720 return UNICODE::as_utf8(position, length);
721 } else {
722 jbyte* position = value->byte_at_addr(start);
723 return UNICODE::as_utf8(position, length);
724 }
725 }
726
727 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
728 assert(value_equals(value, java_lang_String::value(java_string)),
729 "value must be same as java_lang_String::value(java_string)");
730 assert(start + len <= java_lang_String::length(java_string), "just checking");
731 bool is_latin1 = java_lang_String::is_latin1(java_string);
732 if (!is_latin1) {
733 jchar* position = value->char_at_addr(start);
734 return UNICODE::as_utf8(position, len, buf, buflen);
735 } else {
736 jbyte* position = value->byte_at_addr(start);
737 return UNICODE::as_utf8(position, len, buf, buflen);
738 }
739 }
740
741 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
742 assert(java_string->klass() == vmClasses::String_klass(),
743 "must be java_string");
744 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
745 int length = java_lang_String::length(java_string, value);
746 if (length != len) {
747 return false;
748 }
749 bool is_latin1 = java_lang_String::is_latin1(java_string);
750 if (!is_latin1) {
751 for (int i = 0; i < len; i++) {
752 if (value->char_at(i) != chars[i]) {
753 return false;
754 }
755 }
756 } else {
757 for (int i = 0; i < len; i++) {
758 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
759 return false;
760 }
761 }
762 }
763 return true;
764 }
765
766 bool java_lang_String::equals(oop str1, oop str2) {
767 assert(str1->klass() == vmClasses::String_klass(),
768 "must be java String");
769 assert(str2->klass() == vmClasses::String_klass(),
770 "must be java String");
771 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
772 bool is_latin1 = java_lang_String::is_latin1(str1);
773 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
774 bool is_latin2 = java_lang_String::is_latin1(str2);
775
776 if (is_latin1 != is_latin2) {
777 // Strings with different coders are never equal.
778 return false;
779 }
780 return value_equals(value1, value2);
781 }
782
783 // Print the given string to the given outputStream, limiting the output to
784 // at most max_length of the string's characters. If the length exceeds the
785 // limit we print an abridged version of the string with the "middle" elided
786 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
787 // it is treated as max_length-1.
788 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
789 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
790 // We need at least two characters to print A ... B
791 assert(max_length > 1, "invalid max_length: %d", max_length);
792
793 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
794
795 if (value == nullptr) {
796 // This can happen if, e.g., printing a String
797 // object before its initializer has been called
798 st->print("nullptr");
799 return;
800 }
801
802 int length = java_lang_String::length(java_string, value);
803 bool is_latin1 = java_lang_String::is_latin1(java_string);
804
805 bool abridge = length > max_length;
806
807 st->print("\"");
808 for (int index = 0; index < length; index++) {
809 // If we need to abridge and we've printed half the allowed characters
810 // then jump to the tail of the string.
811 if (abridge && index >= max_length / 2) {
812 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
813 index = length - (max_length / 2);
814 abridge = false; // only do this once
815 }
816 jchar c = (!is_latin1) ? value->char_at(index) :
817 ((jchar) value->byte_at(index)) & 0xff;
818 if (c < ' ') {
819 st->print("\\x%02X", c); // print control characters e.g. \x0A
820 } else {
821 st->print("%c", c);
822 }
823 }
824 st->print("\"");
825
826 if (length > max_length) {
827 st->print(" (abridged) ");
828 }
829 }
830
831 // java_lang_Class
832
833 int java_lang_Class::_klass_offset;
834 int java_lang_Class::_array_klass_offset;
835 int java_lang_Class::_oop_size_offset;
836 int java_lang_Class::_static_oop_field_count_offset;
837 int java_lang_Class::_class_loader_offset;
838 int java_lang_Class::_module_offset;
839 int java_lang_Class::_protection_domain_offset;
840 int java_lang_Class::_component_mirror_offset;
841 int java_lang_Class::_init_lock_offset;
842 int java_lang_Class::_signers_offset;
843 int java_lang_Class::_name_offset;
844 int java_lang_Class::_source_file_offset;
845 int java_lang_Class::_classData_offset;
846 int java_lang_Class::_classRedefinedCount_offset;
847
848 bool java_lang_Class::_offsets_computed = false;
849 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
850 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
851
852 #ifdef ASSERT
853 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
854 assert(fd->has_initial_value(), "caller should have checked this");
855 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
856 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
857 }
858 #endif
859
860 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
861 DEBUG_ONLY(assert_valid_static_string_field(fd);)
862 oop string = fd->string_initial_value(CHECK);
863 mirror()->obj_field_put(fd->offset(), string);
864 }
865
866 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
867 assert(fd->has_initial_value(), "caller should have checked this");
868 BasicType t = fd->field_type();
869 switch (t) {
870 case T_BYTE:
871 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
872 break;
873 case T_BOOLEAN:
874 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
875 break;
876 case T_CHAR:
877 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
878 break;
879 case T_SHORT:
880 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
881 break;
882 case T_INT:
883 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
884 break;
885 case T_FLOAT:
886 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
887 break;
888 case T_DOUBLE:
889 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
890 break;
891 case T_LONG:
892 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
893 break;
894 default:
895 // Illegal ConstantValue attribute in class file should have been
896 // caught during classfile parsing.
897 ShouldNotReachHere();
898 }
899 }
900
901 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
902 assert(mirror.not_null() && fd->is_static(), "just checking");
903 if (fd->has_initial_value()) {
904 if (fd->field_type() != T_OBJECT) {
905 initialize_static_primitive_field(fd, mirror);
906 } else {
907 initialize_static_string_field(fd, mirror, CHECK);
908 }
909 }
910 }
911
912 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
913 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
914
915 // If the offset was read from the shared archive, it was fixed up already
916 if (!k->is_shared()) {
917 if (k->is_instance_klass()) {
918 // During bootstrap, java.lang.Class wasn't loaded so static field
919 // offsets were computed without the size added it. Go back and
920 // update all the static field offsets to included the size.
921
922 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
923 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
924 // static fields offsets are updated in this array before reencoding everything into
925 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
926
927 int java_fields;
928 int injected_fields;
929 InstanceKlass* ik = InstanceKlass::cast(k);
930 GrowableArray<FieldInfo>* fields =
931 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
932 &java_fields, &injected_fields);
933 for (int i = 0; i < fields->length(); i++) {
934 FieldInfo* fi = fields->adr_at(i);
935 if (fi->access_flags().is_static()) {
936 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
937 }
938 }
939 Array<u1>* old_stream = ik->fieldinfo_stream();
940 assert(fields->length() == (java_fields + injected_fields), "Must be");
941 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
942 ik->set_fieldinfo_stream(new_fis);
943 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
944 }
945 }
946
947 if (k->is_shared() && k->has_archived_mirror_index()) {
948 if (ArchiveHeapLoader::is_in_use()) {
949 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
950 assert(present, "Missing archived mirror for %s", k->external_name());
951 return;
952 } else {
953 k->clear_java_mirror_handle();
954 k->clear_archived_mirror_index();
955 }
956 }
957 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
958 }
959
960 void java_lang_Class::initialize_mirror_fields(Klass* k,
961 Handle mirror,
962 Handle protection_domain,
963 Handle classData,
964 TRAPS) {
965 // Allocate a simple java object for a lock.
966 // This needs to be a java object because during class initialization
967 // it can be held across a java call.
968 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
969 set_init_lock(mirror(), r);
970
971 // Set protection domain also
972 set_protection_domain(mirror(), protection_domain());
973
974 // Initialize static fields
975 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
976
977 // Set classData
978 set_class_data(mirror(), classData());
979 }
980
981 // Set the java.lang.Module module field in the java_lang_Class mirror
982 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
983 if (module.is_null()) {
984 // During startup, the module may be null only if java.base has not been defined yet.
985 // Put the class on the fixup_module_list to patch later when the java.lang.Module
986 // for java.base is known. But note that since we captured the null module another
987 // thread may have completed that initialization.
988
989 bool javabase_was_defined = false;
990 {
991 MutexLocker m1(current, Module_lock);
992 // Keep list of classes needing java.base module fixup
993 if (!ModuleEntryTable::javabase_defined()) {
994 assert(k->java_mirror() != nullptr, "Class's mirror is null");
995 k->class_loader_data()->inc_keep_alive_ref_count();
996 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
997 fixup_module_field_list()->push(k);
998 } else {
999 javabase_was_defined = true;
1000 }
1001 }
1002
1003 // If java.base was already defined then patch this particular class with java.base.
1004 if (javabase_was_defined) {
1005 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1006 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
1007 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1008 Handle javabase_handle(current, javabase_entry->module());
1009 set_module(mirror(), javabase_handle());
1010 }
1011 } else {
1012 assert(Universe::is_module_initialized() ||
1013 (ModuleEntryTable::javabase_defined() &&
1014 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
1015 "Incorrect java.lang.Module specification while creating mirror");
1016 set_module(mirror(), module());
1017 }
1018 }
1019
1020 // Statically allocate fixup lists because they always get created.
1021 void java_lang_Class::allocate_fixup_lists() {
1022 GrowableArray<Klass*>* mirror_list =
1023 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1024 set_fixup_mirror_list(mirror_list);
1025
1026 GrowableArray<Klass*>* module_list =
1027 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1028 set_fixup_module_field_list(module_list);
1029 }
1030
1031 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1032 Handle& mirror, Handle& comp_mirror, TRAPS) {
1033 // Allocate mirror (java.lang.Class instance)
1034 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1035 mirror = Handle(THREAD, mirror_oop);
1036
1037 // Setup indirection from mirror->klass
1038 set_klass(mirror(), k);
1039
1040 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1041 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1042
1043 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1044
1045 // It might also have a component mirror. This mirror must already exist.
1046 if (k->is_array_klass()) {
1047 if (k->is_flatArray_klass()) {
1048 Klass* element_klass = (Klass*) FlatArrayKlass::cast(k)->element_klass();
1049 assert(element_klass->is_inline_klass(), "Must be inline type component");
1050 if (is_scratch) {
1051 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1052 } else {
1053 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1054 }
1055 } else if (k->is_typeArray_klass()) {
1056 BasicType type = TypeArrayKlass::cast(k)->element_type();
1057 if (is_scratch) {
1058 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1059 } else {
1060 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1061 }
1062 } else {
1063 assert(k->is_objArray_klass(), "Must be");
1064 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1065 assert(element_klass != nullptr, "Must have an element klass");
1066 oop comp_oop = element_klass->java_mirror();
1067 if (is_scratch) {
1068 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1069 } else {
1070 comp_mirror = Handle(THREAD, comp_oop);
1071 }
1072 }
1073 assert(comp_mirror() != nullptr, "must have a mirror");
1074
1075 // Two-way link between the array klass and its component mirror:
1076 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1077 set_component_mirror(mirror(), comp_mirror());
1078 // See below for ordering dependencies between field array_klass in component mirror
1079 // and java_mirror in this klass.
1080 } else {
1081 assert(k->is_instance_klass(), "Must be");
1082
1083 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1084 if (HAS_PENDING_EXCEPTION) {
1085 // If any of the fields throws an exception like OOM remove the klass field
1086 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1087 // This mirror looks like a primitive type, which logically it is because it
1088 // it represents no class.
1089 set_klass(mirror(), nullptr);
1090 return;
1091 }
1092 }
1093 }
1094
1095 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1096 Handle module, Handle protection_domain,
1097 Handle classData, TRAPS) {
1098 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1099 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1100
1101 // Use this moment of initialization to cache modifier_flags also,
1102 // to support Class.getModifiers(). Instance classes recalculate
1103 // the cached flags after the class file is parsed, but before the
1104 // class is put into the system dictionary.
1105 int computed_modifiers = k->compute_modifier_flags();
1106 k->set_modifier_flags(computed_modifiers);
1107 // Class_klass has to be loaded because it is used to allocate
1108 // the mirror.
1109 if (vmClasses::Class_klass_loaded()) {
1110 Handle mirror;
1111 Handle comp_mirror;
1112
1113 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1114
1115 // set the classLoader field in the java_lang_Class instance
1116 assert(class_loader() == k->class_loader(), "should be same");
1117 set_class_loader(mirror(), class_loader());
1118
1119 // Setup indirection from klass->mirror
1120 // after any exceptions can happen during allocations.
1121 k->set_java_mirror(mirror);
1122
1123 // Set the module field in the java_lang_Class instance. This must be done
1124 // after the mirror is set.
1125 set_mirror_module_field(THREAD, k, mirror, module);
1126
1127 if (comp_mirror() != nullptr) {
1128 // Set after k->java_mirror() is published, because compiled code running
1129 // concurrently doesn't expect a k to have a null java_mirror.
1130 release_set_array_klass(comp_mirror(), k);
1131 }
1132
1133 if (CDSConfig::is_dumping_heap()) {
1134 create_scratch_mirror(k, CHECK);
1135 }
1136 } else {
1137 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1138 fixup_mirror_list()->push(k);
1139 }
1140 }
1141
1142 #if INCLUDE_CDS_JAVA_HEAP
1143 // The "scratch mirror" stores the states of the mirror object that can be
1144 // decided at dump time (such as the initial values of the static fields, the
1145 // component mirror, etc). At runtime, more information is added to it by
1146 // java_lang_Class::restore_archived_mirror().
1147 //
1148 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1149 // produces the same result as /*runtime*/create_mirror().
1150 //
1151 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1152 // latter may contain dumptime-specific information that cannot be archived
1153 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1154 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1155 if ((k->class_loader() != nullptr &&
1156 k->class_loader() != SystemDictionary::java_platform_loader() &&
1157 k->class_loader() != SystemDictionary::java_system_loader())) {
1158 // We only archive the mirrors of classes loaded by the built-in loaders
1159 return;
1160 }
1161
1162 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1163 Handle mirror;
1164 Handle comp_mirror;
1165 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1166
1167 if (comp_mirror() != nullptr) {
1168 release_set_array_klass(comp_mirror(), k);
1169 }
1170
1171 HeapShared::set_scratch_java_mirror(k, mirror());
1172 }
1173
1174 // Returns true if the mirror is updated, false if no archived mirror
1175 // data is present. After the archived mirror object is restored, the
1176 // shared klass' _has_raw_archived_mirror flag is cleared.
1177 bool java_lang_Class::restore_archived_mirror(Klass *k,
1178 Handle class_loader, Handle module,
1179 Handle protection_domain, TRAPS) {
1180 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1181 // see more details in vmClasses::resolve_all().
1182 if (!vmClasses::Class_klass_loaded()) {
1183 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1184 fixup_mirror_list()->push(k);
1185 return true;
1186 }
1187
1188 oop m = k->archived_java_mirror();
1189 assert(m != nullptr, "must have stored non-null archived mirror");
1190
1191 // Sanity: clear it now to prevent re-initialization if any of the following fails
1192 k->clear_archived_mirror_index();
1193
1194 // mirror is archived, restore
1195 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1196 assert(as_Klass(m) == k, "must be");
1197 Handle mirror(THREAD, m);
1198
1199 if (!k->is_array_klass()) {
1200 // - local static final fields with initial values were initialized at dump time
1201
1202 // create the init_lock
1203 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1204 set_init_lock(mirror(), r);
1205
1206 if (protection_domain.not_null()) {
1207 set_protection_domain(mirror(), protection_domain());
1208 }
1209 }
1210
1211 assert(class_loader() == k->class_loader(), "should be same");
1212 if (class_loader.not_null()) {
1213 set_class_loader(mirror(), class_loader());
1214 }
1215
1216 k->set_java_mirror(mirror);
1217
1218 set_mirror_module_field(THREAD, k, mirror, module);
1219
1220 if (log_is_enabled(Trace, cds, heap, mirror)) {
1221 ResourceMark rm(THREAD);
1222 log_trace(cds, heap, mirror)(
1223 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1224 }
1225
1226 return true;
1227 }
1228 #endif // INCLUDE_CDS_JAVA_HEAP
1229
1230 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1231 assert(_module_offset != 0, "must have been computed already");
1232 set_module(k->java_mirror(), module());
1233 }
1234
1235 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1236 assert(_oop_size_offset != 0, "must be set");
1237 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1238 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1239 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1240 }
1241
1242 int java_lang_Class::static_oop_field_count(oop java_class) {
1243 assert(_static_oop_field_count_offset != 0, "must be set");
1244 return java_class->int_field(_static_oop_field_count_offset);
1245 }
1246
1247 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1248 assert(_static_oop_field_count_offset != 0, "must be set");
1249 java_class->int_field_put(_static_oop_field_count_offset, size);
1250 }
1251
1252 oop java_lang_Class::protection_domain(oop java_class) {
1253 assert(_protection_domain_offset != 0, "must be set");
1254 return java_class->obj_field(_protection_domain_offset);
1255 }
1256 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1257 assert(_protection_domain_offset != 0, "must be set");
1258 java_class->obj_field_put(_protection_domain_offset, pd);
1259 }
1260
1261 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1262 assert(_component_mirror_offset != 0, "must be set");
1263 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1264 }
1265 oop java_lang_Class::component_mirror(oop java_class) {
1266 assert(_component_mirror_offset != 0, "must be set");
1267 return java_class->obj_field(_component_mirror_offset);
1268 }
1269
1270 oop java_lang_Class::init_lock(oop java_class) {
1271 assert(_init_lock_offset != 0, "must be set");
1272 return java_class->obj_field(_init_lock_offset);
1273 }
1274 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1275 assert(_init_lock_offset != 0, "must be set");
1276 java_class->obj_field_put(_init_lock_offset, init_lock);
1277 }
1278
1279 objArrayOop java_lang_Class::signers(oop java_class) {
1280 assert(_signers_offset != 0, "must be set");
1281 return (objArrayOop)java_class->obj_field(_signers_offset);
1282 }
1283
1284 oop java_lang_Class::class_data(oop java_class) {
1285 assert(_classData_offset != 0, "must be set");
1286 return java_class->obj_field(_classData_offset);
1287 }
1288 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1289 assert(_classData_offset != 0, "must be set");
1290 java_class->obj_field_put(_classData_offset, class_data);
1291 }
1292
1293 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1294 assert(_class_loader_offset != 0, "offsets should have been initialized");
1295 java_class->obj_field_put(_class_loader_offset, loader);
1296 }
1297
1298 oop java_lang_Class::class_loader(oop java_class) {
1299 assert(_class_loader_offset != 0, "must be set");
1300 return java_class->obj_field(_class_loader_offset);
1301 }
1302
1303 oop java_lang_Class::module(oop java_class) {
1304 assert(_module_offset != 0, "must be set");
1305 return java_class->obj_field(_module_offset);
1306 }
1307
1308 void java_lang_Class::set_module(oop java_class, oop module) {
1309 assert(_module_offset != 0, "must be set");
1310 java_class->obj_field_put(_module_offset, module);
1311 }
1312
1313 oop java_lang_Class::name(Handle java_class, TRAPS) {
1314 assert(_name_offset != 0, "must be set");
1315 oop o = java_class->obj_field(_name_offset);
1316 if (o == nullptr) {
1317 o = StringTable::intern(as_external_name(java_class()), THREAD);
1318 java_class->obj_field_put(_name_offset, o);
1319 }
1320 return o;
1321 }
1322
1323 oop java_lang_Class::source_file(oop java_class) {
1324 assert(_source_file_offset != 0, "must be set");
1325 return java_class->obj_field(_source_file_offset);
1326 }
1327
1328 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1329 assert(_source_file_offset != 0, "must be set");
1330 java_class->obj_field_put(_source_file_offset, source_file);
1331 }
1332
1333 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1334 // This should be improved by adding a field at the Java level or by
1335 // introducing a new VM klass (see comment in ClassFileParser)
1336 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1337 if (type != T_VOID) {
1338 Klass* aklass = Universe::typeArrayKlass(type);
1339 assert(aklass != nullptr, "correct bootstrap");
1340 release_set_array_klass(java_class, aklass);
1341 }
1342 #ifdef ASSERT
1343 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1344 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1345 #endif
1346 return java_class;
1347 }
1348
1349 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1350 assert(is_instance(java_class), "must be a Class object");
1351 java_class->metadata_field_put(_klass_offset, klass);
1352 }
1353
1354
1355 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1356 assert(is_instance(java_class), "must be a Class object");
1357 Symbol* name = nullptr;
1358 bool is_instance = false;
1359 if (is_primitive(java_class)) {
1360 name = vmSymbols::type_signature(primitive_type(java_class));
1361 } else {
1362 Klass* k = as_Klass(java_class);
1363 is_instance = k->is_instance_klass();
1364 name = k->name();
1365 }
1366 if (name == nullptr) {
1367 st->print("<null>");
1368 return;
1369 }
1370 if (is_instance) {
1371 st->print("L");
1372 }
1373 st->write((char*) name->base(), (int) name->utf8_length());
1374 if (is_instance) st->print(";");
1375 }
1376
1377 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1378 assert(is_instance(java_class), "must be a Class object");
1379 Symbol* name;
1380 if (is_primitive(java_class)) {
1381 name = vmSymbols::type_signature(primitive_type(java_class));
1382 // Because this can create a new symbol, the caller has to decrement
1383 // the refcount, so make adjustment here and below for symbols returned
1384 // that are not created or incremented due to a successful lookup.
1385 name->increment_refcount();
1386 } else {
1387 Klass* k = as_Klass(java_class);
1388 if (!k->is_instance_klass()) {
1389 name = k->name();
1390 name->increment_refcount();
1391 } else {
1392 ResourceMark rm;
1393 const char* sigstr = k->signature_name();
1394 int siglen = (int) strlen(sigstr);
1395 if (!intern_if_not_found) {
1396 name = SymbolTable::probe(sigstr, siglen);
1397 } else {
1398 name = SymbolTable::new_symbol(sigstr, siglen);
1399 }
1400 }
1401 }
1402 return name;
1403 }
1404
1405 // Returns the Java name for this Java mirror (Resource allocated)
1406 // See Klass::external_name().
1407 // For primitive type Java mirrors, its type name is returned.
1408 const char* java_lang_Class::as_external_name(oop java_class) {
1409 assert(is_instance(java_class), "must be a Class object");
1410 const char* name = nullptr;
1411 if (is_primitive(java_class)) {
1412 name = type2name(primitive_type(java_class));
1413 } else {
1414 name = as_Klass(java_class)->external_name();
1415 }
1416 if (name == nullptr) {
1417 name = "<null>";
1418 }
1419 return name;
1420 }
1421
1422 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1423 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1424 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1425 return k;
1426 }
1427
1428
1429 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1430 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1431 if (klass->is_flatArray_klass() || (klass->is_objArray_klass() && ObjArrayKlass::cast(klass)->is_null_free_array_klass())) {
1432 // TODO 8336006 Ignore flat / null-free arrays
1433 return;
1434 }
1435 java_class->release_metadata_field_put(_array_klass_offset, klass);
1436 }
1437
1438
1439 BasicType java_lang_Class::primitive_type(oop java_class) {
1440 assert(is_primitive(java_class), "just checking");
1441 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1442 BasicType type = T_VOID;
1443 if (ak != nullptr) {
1444 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1445 type = ArrayKlass::cast(ak)->element_type();
1446 } else {
1447 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1448 }
1449 #ifdef ASSERT
1450 if (CDSConfig::is_dumping_heap()) {
1451 oop mirror = Universe::java_mirror(type);
1452 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1453 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1454 } else {
1455 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1456 }
1457 #endif
1458 return type;
1459 }
1460
1461 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1462 assert(is_instance(java_class), "must be a Class object");
1463 if (is_primitive(java_class)) {
1464 if (reference_klass != nullptr)
1465 (*reference_klass) = nullptr;
1466 return primitive_type(java_class);
1467 } else {
1468 if (reference_klass != nullptr)
1469 (*reference_klass) = as_Klass(java_class);
1470 return T_OBJECT;
1471 }
1472 }
1473
1474
1475 oop java_lang_Class::primitive_mirror(BasicType t) {
1476 oop mirror = Universe::java_mirror(t);
1477 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1478 assert(is_primitive(mirror), "must be primitive");
1479 return mirror;
1480 }
1481
1482 #define CLASS_FIELDS_DO(macro) \
1483 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1484 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1485 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1486 macro(_module_offset, k, "module", module_signature, false); \
1487 macro(_name_offset, k, "name", string_signature, false); \
1488 macro(_classData_offset, k, "classData", object_signature, false); \
1489 macro(_signers_offset, k, "signers", object_array_signature, false);
1490
1491 void java_lang_Class::compute_offsets() {
1492 if (_offsets_computed) {
1493 return;
1494 }
1495
1496 _offsets_computed = true;
1497
1498 InstanceKlass* k = vmClasses::Class_klass();
1499 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1500 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1501 }
1502
1503 #if INCLUDE_CDS
1504 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1505 f->do_bool(&_offsets_computed);
1506
1507 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1508
1509 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1510 }
1511 #endif
1512
1513 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1514 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1515 return the_class_mirror->int_field(_classRedefinedCount_offset);
1516 }
1517
1518 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1519 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1520 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1521 }
1522
1523
1524 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1525 // platform thread structure, and a eetop offset which was used for thread
1526 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1527 // merged, so in the HotSpot VM we just use the eetop field for the thread
1528 // instead of the privateInfo_offset.
1529 //
1530 // Note: The stackSize field is only present starting in 1.4.
1531
1532 int java_lang_Thread_FieldHolder::_group_offset;
1533 int java_lang_Thread_FieldHolder::_priority_offset;
1534 int java_lang_Thread_FieldHolder::_stackSize_offset;
1535 int java_lang_Thread_FieldHolder::_daemon_offset;
1536 int java_lang_Thread_FieldHolder::_thread_status_offset;
1537
1538 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1539 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1540 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1541 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1542 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1543 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1544
1545 void java_lang_Thread_FieldHolder::compute_offsets() {
1546 assert(_group_offset == 0, "offsets should be initialized only once");
1547
1548 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1549 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1550 }
1551
1552 #if INCLUDE_CDS
1553 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1554 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1555 }
1556 #endif
1557
1558 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1559 return holder->obj_field(_group_offset);
1560 }
1561
1562 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1563 return (ThreadPriority)holder->int_field(_priority_offset);
1564 }
1565
1566 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1567 holder->int_field_put(_priority_offset, priority);
1568 }
1569
1570 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1571 return holder->long_field(_stackSize_offset);
1572 }
1573
1574 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1575 return holder->bool_field(_daemon_offset) != 0;
1576 }
1577
1578 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1579 assert(val, "daemon status is never turned off");
1580 holder->bool_field_put(_daemon_offset, val);
1581 }
1582
1583 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1584 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1585 }
1586
1587 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1588 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1589 }
1590
1591
1592 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1593
1594 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1595 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1596
1597 void java_lang_Thread_Constants::compute_offsets() {
1598 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1599
1600 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1601 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1602 }
1603
1604 #if INCLUDE_CDS
1605 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1606 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1607 }
1608 #endif
1609
1610 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1611 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1612 oop base = k->static_field_base_raw();
1613 return base->obj_field(_static_VTHREAD_GROUP_offset);
1614 }
1615
1616
1617 int java_lang_Thread::_holder_offset;
1618 int java_lang_Thread::_name_offset;
1619 int java_lang_Thread::_contextClassLoader_offset;
1620 int java_lang_Thread::_inheritedAccessControlContext_offset;
1621 int java_lang_Thread::_eetop_offset;
1622 int java_lang_Thread::_jvmti_thread_state_offset;
1623 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1624 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1625 int java_lang_Thread::_interrupted_offset;
1626 int java_lang_Thread::_interruptLock_offset;
1627 int java_lang_Thread::_tid_offset;
1628 int java_lang_Thread::_continuation_offset;
1629 int java_lang_Thread::_park_blocker_offset;
1630 int java_lang_Thread::_scopedValueBindings_offset;
1631 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1632
1633 #define THREAD_FIELDS_DO(macro) \
1634 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1635 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1636 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1637 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1638 macro(_eetop_offset, k, "eetop", long_signature, false); \
1639 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1640 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1641 macro(_tid_offset, k, "tid", long_signature, false); \
1642 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1643 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1644 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1645
1646 void java_lang_Thread::compute_offsets() {
1647 assert(_holder_offset == 0, "offsets should be initialized only once");
1648
1649 InstanceKlass* k = vmClasses::Thread_klass();
1650 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1651 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1652 }
1653
1654 #if INCLUDE_CDS
1655 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1656 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1657 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1658 }
1659 #endif
1660
1661 JavaThread* java_lang_Thread::thread(oop java_thread) {
1662 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1663 }
1664
1665 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1666 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1667 }
1668
1669 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1670 java_thread->address_field_put(_eetop_offset, (address)thread);
1671 }
1672
1673 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1674 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1675 }
1676
1677 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1678 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1679 }
1680
1681 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1682 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1683 }
1684
1685 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1686 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1687 }
1688
1689 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1690 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1691 int val = VTMS_transition_disable_count(java_thread);
1692 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1693 }
1694
1695 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1696 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1697 int val = VTMS_transition_disable_count(java_thread);
1698 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1699 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1700 }
1701
1702 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1703 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1704 }
1705
1706 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1707 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1708 }
1709
1710 int java_lang_Thread::is_in_VTMS_transition_offset() {
1711 return _jvmti_is_in_VTMS_transition_offset;
1712 }
1713
1714 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1715 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1716 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1717 }
1718
1719 oop java_lang_Thread::holder(oop java_thread) {
1720 // Note: may return null if the thread is still attaching
1721 return java_thread->obj_field(_holder_offset);
1722 }
1723 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1724 return java_thread->obj_field(_interruptLock_offset);
1725 }
1726
1727 bool java_lang_Thread::interrupted(oop java_thread) {
1728 // Make sure the caller can safely access oops.
1729 assert(Thread::current()->is_VM_thread() ||
1730 (JavaThread::current()->thread_state() != _thread_blocked &&
1731 JavaThread::current()->thread_state() != _thread_in_native),
1732 "Unsafe access to oop");
1733 return java_thread->bool_field_volatile(_interrupted_offset);
1734 }
1735
1736 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1737 // Make sure the caller can safely access oops.
1738 assert(Thread::current()->is_VM_thread() ||
1739 (JavaThread::current()->thread_state() != _thread_blocked &&
1740 JavaThread::current()->thread_state() != _thread_in_native),
1741 "Unsafe access to oop");
1742 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1743 }
1744
1745
1746 oop java_lang_Thread::name(oop java_thread) {
1747 return java_thread->obj_field(_name_offset);
1748 }
1749
1750
1751 void java_lang_Thread::set_name(oop java_thread, oop name) {
1752 java_thread->obj_field_put(_name_offset, name);
1753 }
1754
1755 // Convenience macros for setting and getting Thread fields that
1756 // are actually stored in the FieldHolder object of the thread.
1757 // The FieldHolder can be null whilst a thread is attaching via
1758 // JNI, and when the main thread is attaching.
1759
1760 // The default value should be the default/zero initialized value
1761 // of the field as it would be in java.lang.Thread.FieldHolder.
1762 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1763 { \
1764 oop holder = java_lang_Thread::holder(java_thread); \
1765 if (holder != nullptr) \
1766 return java_lang_Thread_FieldHolder::field(holder); \
1767 else \
1768 return default_val; \
1769 }
1770
1771 // We should never be trying to set a field of an attaching thread.
1772 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1773 { \
1774 oop holder = java_lang_Thread::holder(java_thread); \
1775 assert(holder != nullptr, "Thread not fully initialized"); \
1776 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1777 }
1778
1779
1780 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1781 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1782 }
1783
1784
1785 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1786 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1787 }
1788
1789
1790 oop java_lang_Thread::threadGroup(oop java_thread) {
1791 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1792 }
1793
1794
1795 bool java_lang_Thread::is_alive(oop java_thread) {
1796 JavaThread* thr = java_lang_Thread::thread(java_thread);
1797 return (thr != nullptr);
1798 }
1799
1800
1801 bool java_lang_Thread::is_daemon(oop java_thread) {
1802 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1803 }
1804
1805
1806 void java_lang_Thread::set_daemon(oop java_thread) {
1807 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1808 }
1809
1810 oop java_lang_Thread::context_class_loader(oop java_thread) {
1811 return java_thread->obj_field(_contextClassLoader_offset);
1812 }
1813
1814 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1815 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1816 }
1817
1818
1819 jlong java_lang_Thread::stackSize(oop java_thread) {
1820 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1821 }
1822
1823 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1824 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1825 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1826 }
1827
1828 // Read thread status value from threadStatus field in java.lang.Thread java class.
1829 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1830 // Make sure the caller is operating on behalf of the VM or is
1831 // running VM code (state == _thread_in_vm).
1832 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1833 JavaThread::current()->thread_state() == _thread_in_vm,
1834 "Java Thread is not running in vm");
1835 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1836 }
1837
1838 ByteSize java_lang_Thread::thread_id_offset() {
1839 return in_ByteSize(_tid_offset);
1840 }
1841
1842 oop java_lang_Thread::park_blocker(oop java_thread) {
1843 return java_thread->obj_field(_park_blocker_offset);
1844 }
1845
1846 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1847 ThreadsListHandle tlh(JavaThread::current());
1848 JavaThread* thread;
1849 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1850 if (is_virtual) {
1851 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1852 if (carrier_thread == nullptr) {
1853 return nullptr;
1854 }
1855 thread = java_lang_Thread::thread(carrier_thread);
1856 } else {
1857 thread = java_lang_Thread::thread(java_thread);
1858 }
1859 if (thread == nullptr) {
1860 return nullptr;
1861 }
1862
1863 class GetStackTraceClosure : public HandshakeClosure {
1864 public:
1865 const Handle _java_thread;
1866 int _depth;
1867 bool _retry_handshake;
1868 GrowableArray<Method*>* _methods;
1869 GrowableArray<int>* _bcis;
1870
1871 GetStackTraceClosure(Handle java_thread) :
1872 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1873 _methods(nullptr), _bcis(nullptr) {
1874 }
1875 ~GetStackTraceClosure() {
1876 delete _methods;
1877 delete _bcis;
1878 }
1879
1880 bool read_reset_retry() {
1881 bool ret = _retry_handshake;
1882 // If we re-execute the handshake this method need to return false
1883 // when the handshake cannot be performed. (E.g. thread terminating)
1884 _retry_handshake = false;
1885 return ret;
1886 }
1887
1888 void do_thread(Thread* th) {
1889 if (!Thread::current()->is_Java_thread()) {
1890 _retry_handshake = true;
1891 return;
1892 }
1893
1894 JavaThread* thread = JavaThread::cast(th);
1895
1896 if (!thread->has_last_Java_frame()) {
1897 return;
1898 }
1899
1900 bool carrier = false;
1901 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1902 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1903 const ContinuationEntry* ce = thread->vthread_continuation();
1904 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1905 return; // not mounted
1906 }
1907 } else {
1908 carrier = (thread->vthread_continuation() != nullptr);
1909 }
1910
1911 const int max_depth = MaxJavaStackTraceDepth;
1912 const bool skip_hidden = !ShowHiddenFrames;
1913
1914 // Pick minimum length that will cover most cases
1915 int init_length = 64;
1916 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1917 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1918
1919 int total_count = 0;
1920 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1921 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1922 vfst.next()) {
1923
1924 if (skip_hidden && (vfst.method()->is_hidden() ||
1925 vfst.method()->is_continuation_enter_intrinsic())) {
1926 continue;
1927 }
1928
1929 _methods->push(vfst.method());
1930 _bcis->push(vfst.bci());
1931 total_count++;
1932 }
1933
1934 _depth = total_count;
1935 }
1936 };
1937
1938 // Handshake with target
1939 ResourceMark rm(THREAD);
1940 HandleMark hm(THREAD);
1941 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1942 do {
1943 Handshake::execute(&gstc, &tlh, thread);
1944 } while (gstc.read_reset_retry());
1945
1946 // Stop if no stack trace is found.
1947 if (gstc._depth == 0) {
1948 return nullptr;
1949 }
1950
1951 // Convert to StackTraceElement array
1952 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1953 assert(k != nullptr, "must be loaded in 1.4+");
1954 if (k->should_be_initialized()) {
1955 k->initialize(CHECK_NULL);
1956 }
1957 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1958
1959 for (int i = 0; i < gstc._depth; i++) {
1960 methodHandle method(THREAD, gstc._methods->at(i));
1961 oop element = java_lang_StackTraceElement::create(method,
1962 gstc._bcis->at(i),
1963 CHECK_NULL);
1964 trace->obj_at_put(i, element);
1965 }
1966
1967 return trace();
1968 }
1969
1970 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1971 JavaThreadStatus status = get_thread_status(java_thread);
1972 switch (status) {
1973 case JavaThreadStatus::NEW : return "NEW";
1974 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1975 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1976 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1977 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1978 case JavaThreadStatus::PARKED : return "WAITING (parking)";
1979 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
1980 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1981 case JavaThreadStatus::TERMINATED : return "TERMINATED";
1982 default : return "UNKNOWN";
1983 };
1984 }
1985 int java_lang_ThreadGroup::_parent_offset;
1986 int java_lang_ThreadGroup::_name_offset;
1987 int java_lang_ThreadGroup::_maxPriority_offset;
1988 int java_lang_ThreadGroup::_daemon_offset;
1989
1990 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1991 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1992 return java_thread_group->obj_field(_parent_offset);
1993 }
1994
1995 // ("name as oop" accessor is not necessary)
1996
1997 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1998 oop name = java_thread_group->obj_field(_name_offset);
1999 // ThreadGroup.name can be null
2000 if (name != nullptr) {
2001 return java_lang_String::as_utf8_string(name);
2002 }
2003 return nullptr;
2004 }
2005
2006 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2007 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2008 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2009 }
2010
2011 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2012 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2013 return java_thread_group->bool_field(_daemon_offset) != 0;
2014 }
2015
2016 #define THREADGROUP_FIELDS_DO(macro) \
2017 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2018 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2019 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2020 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2021
2022 void java_lang_ThreadGroup::compute_offsets() {
2023 assert(_parent_offset == 0, "offsets should be initialized only once");
2024
2025 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2026 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2027 }
2028
2029 #if INCLUDE_CDS
2030 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2031 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2032 }
2033 #endif
2034
2035
2036 // java_lang_VirtualThread
2037
2038 int java_lang_VirtualThread::static_vthread_scope_offset;
2039 int java_lang_VirtualThread::_carrierThread_offset;
2040 int java_lang_VirtualThread::_continuation_offset;
2041 int java_lang_VirtualThread::_state_offset;
2042
2043 #define VTHREAD_FIELDS_DO(macro) \
2044 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2045 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2046 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2047 macro(_state_offset, k, "state", int_signature, false)
2048
2049
2050 void java_lang_VirtualThread::compute_offsets() {
2051 InstanceKlass* k = vmClasses::VirtualThread_klass();
2052 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2053 }
2054
2055 bool java_lang_VirtualThread::is_instance(oop obj) {
2056 return obj != nullptr && is_subclass(obj->klass());
2057 }
2058
2059 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2060 oop thread = vthread->obj_field(_carrierThread_offset);
2061 return thread;
2062 }
2063
2064 oop java_lang_VirtualThread::continuation(oop vthread) {
2065 oop cont = vthread->obj_field(_continuation_offset);
2066 return cont;
2067 }
2068
2069 int java_lang_VirtualThread::state(oop vthread) {
2070 return vthread->int_field_acquire(_state_offset);
2071 }
2072
2073 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2074 JavaThreadStatus status = JavaThreadStatus::NEW;
2075 switch (state & ~SUSPENDED) {
2076 case NEW:
2077 status = JavaThreadStatus::NEW;
2078 break;
2079 case STARTED:
2080 case RUNNING:
2081 case PARKING:
2082 case TIMED_PARKING:
2083 case UNPARKED:
2084 case YIELDING:
2085 case YIELDED:
2086 status = JavaThreadStatus::RUNNABLE;
2087 break;
2088 case PARKED:
2089 case PINNED:
2090 status = JavaThreadStatus::PARKED;
2091 break;
2092 case TIMED_PARKED:
2093 case TIMED_PINNED:
2094 status = JavaThreadStatus::PARKED_TIMED;
2095 break;
2096 case TERMINATED:
2097 status = JavaThreadStatus::TERMINATED;
2098 break;
2099 default:
2100 ShouldNotReachHere();
2101 }
2102 return status;
2103 }
2104
2105 #if INCLUDE_CDS
2106 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2107 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2108 }
2109 #endif
2110
2111 // java_lang_Throwable
2112
2113 int java_lang_Throwable::_backtrace_offset;
2114 int java_lang_Throwable::_detailMessage_offset;
2115 int java_lang_Throwable::_stackTrace_offset;
2116 int java_lang_Throwable::_depth_offset;
2117 int java_lang_Throwable::_cause_offset;
2118 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2119
2120 #define THROWABLE_FIELDS_DO(macro) \
2121 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2122 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2123 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2124 macro(_depth_offset, k, "depth", int_signature, false); \
2125 macro(_cause_offset, k, "cause", throwable_signature, false); \
2126 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2127
2128 void java_lang_Throwable::compute_offsets() {
2129 InstanceKlass* k = vmClasses::Throwable_klass();
2130 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2131 }
2132
2133 #if INCLUDE_CDS
2134 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2135 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2136 }
2137 #endif
2138
2139 oop java_lang_Throwable::unassigned_stacktrace() {
2140 InstanceKlass* ik = vmClasses::Throwable_klass();
2141 oop base = ik->static_field_base_raw();
2142 return base->obj_field(_static_unassigned_stacktrace_offset);
2143 }
2144
2145 oop java_lang_Throwable::backtrace(oop throwable) {
2146 return throwable->obj_field_acquire(_backtrace_offset);
2147 }
2148
2149
2150 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2151 throwable->release_obj_field_put(_backtrace_offset, value);
2152 }
2153
2154 int java_lang_Throwable::depth(oop throwable) {
2155 return throwable->int_field(_depth_offset);
2156 }
2157
2158 void java_lang_Throwable::set_depth(oop throwable, int value) {
2159 throwable->int_field_put(_depth_offset, value);
2160 }
2161
2162 oop java_lang_Throwable::message(oop throwable) {
2163 return throwable->obj_field(_detailMessage_offset);
2164 }
2165
2166 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2167 oop msg = java_lang_Throwable::message(throwable);
2168 const char* msg_utf8 = nullptr;
2169 if (msg != nullptr) {
2170 msg_utf8 = java_lang_String::as_utf8_string(msg);
2171 }
2172 return msg_utf8;
2173 }
2174
2175 oop java_lang_Throwable::cause(oop throwable) {
2176 return throwable->obj_field(_cause_offset);
2177 }
2178
2179 void java_lang_Throwable::set_message(oop throwable, oop value) {
2180 throwable->obj_field_put(_detailMessage_offset, value);
2181 }
2182
2183
2184 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2185 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2186 }
2187
2188 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2189 set_stacktrace(throwable, nullptr);
2190 }
2191
2192
2193 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2194 ResourceMark rm;
2195 Klass* k = throwable->klass();
2196 assert(k != nullptr, "just checking");
2197 st->print("%s", k->external_name());
2198 oop msg = message(throwable);
2199 if (msg != nullptr) {
2200 st->print(": %s", java_lang_String::as_utf8_string(msg));
2201 }
2202 }
2203
2204 // After this many redefines, the stack trace is unreliable.
2205 const int MAX_VERSION = USHRT_MAX;
2206
2207 static inline bool version_matches(Method* method, int version) {
2208 assert(version < MAX_VERSION, "version is too big");
2209 return method != nullptr && (method->constants()->version() == version);
2210 }
2211
2212 // This class provides a simple wrapper over the internal structure of
2213 // exception backtrace to insulate users of the backtrace from needing
2214 // to know what it looks like.
2215 // The code of this class is not GC safe. Allocations can only happen
2216 // in expand().
2217 class BacktraceBuilder: public StackObj {
2218 friend class BacktraceIterator;
2219 private:
2220 Handle _backtrace;
2221 objArrayOop _head;
2222 typeArrayOop _methods;
2223 typeArrayOop _bcis;
2224 objArrayOop _mirrors;
2225 typeArrayOop _names; // Needed to insulate method name against redefinition.
2226 // True if the top frame of the backtrace is omitted because it shall be hidden.
2227 bool _has_hidden_top_frame;
2228 int _index;
2229 NoSafepointVerifier _nsv;
2230
2231 enum {
2232 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2233 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2234 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2235 trace_names_offset = java_lang_Throwable::trace_names_offset,
2236 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2237 trace_next_offset = java_lang_Throwable::trace_next_offset,
2238 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2239 trace_size = java_lang_Throwable::trace_size,
2240 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2241 };
2242
2243 // get info out of chunks
2244 static typeArrayOop get_methods(objArrayHandle chunk) {
2245 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2246 assert(methods != nullptr, "method array should be initialized in backtrace");
2247 return methods;
2248 }
2249 static typeArrayOop get_bcis(objArrayHandle chunk) {
2250 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2251 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2252 return bcis;
2253 }
2254 static objArrayOop get_mirrors(objArrayHandle chunk) {
2255 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2256 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2257 return mirrors;
2258 }
2259 static typeArrayOop get_names(objArrayHandle chunk) {
2260 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2261 assert(names != nullptr, "names array should be initialized in backtrace");
2262 return names;
2263 }
2264 static bool has_hidden_top_frame(objArrayHandle chunk) {
2265 oop hidden = chunk->obj_at(trace_hidden_offset);
2266 return hidden != nullptr;
2267 }
2268
2269 public:
2270
2271 // constructor for new backtrace
2272 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2273 expand(CHECK);
2274 _backtrace = Handle(THREAD, _head);
2275 _index = 0;
2276 }
2277
2278 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2279 _methods = get_methods(backtrace);
2280 _bcis = get_bcis(backtrace);
2281 _mirrors = get_mirrors(backtrace);
2282 _names = get_names(backtrace);
2283 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2284 assert(_methods->length() == _bcis->length() &&
2285 _methods->length() == _mirrors->length() &&
2286 _mirrors->length() == _names->length(),
2287 "method and source information arrays should match");
2288
2289 // head is the preallocated backtrace
2290 _head = backtrace();
2291 _backtrace = Handle(thread, _head);
2292 _index = 0;
2293 }
2294
2295 void expand(TRAPS) {
2296 objArrayHandle old_head(THREAD, _head);
2297 PauseNoSafepointVerifier pnsv(&_nsv);
2298
2299 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2300 objArrayHandle new_head(THREAD, head);
2301
2302 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2303 typeArrayHandle new_methods(THREAD, methods);
2304
2305 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2306 typeArrayHandle new_bcis(THREAD, bcis);
2307
2308 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2309 objArrayHandle new_mirrors(THREAD, mirrors);
2310
2311 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2312 typeArrayHandle new_names(THREAD, names);
2313
2314 if (!old_head.is_null()) {
2315 old_head->obj_at_put(trace_next_offset, new_head());
2316 }
2317 new_head->obj_at_put(trace_methods_offset, new_methods());
2318 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2319 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2320 new_head->obj_at_put(trace_names_offset, new_names());
2321 new_head->obj_at_put(trace_hidden_offset, nullptr);
2322
2323 _head = new_head();
2324 _methods = new_methods();
2325 _bcis = new_bcis();
2326 _mirrors = new_mirrors();
2327 _names = new_names();
2328 _index = 0;
2329 }
2330
2331 oop backtrace() {
2332 return _backtrace();
2333 }
2334
2335 inline void push(Method* method, int bci, TRAPS) {
2336 // Smear the -1 bci to 0 since the array only holds unsigned
2337 // shorts. The later line number lookup would just smear the -1
2338 // to a 0 even if it could be recorded.
2339 if (bci == SynchronizationEntryBCI) bci = 0;
2340
2341 if (_index >= trace_chunk_size) {
2342 methodHandle mhandle(THREAD, method);
2343 expand(CHECK);
2344 method = mhandle();
2345 }
2346
2347 _methods->ushort_at_put(_index, method->orig_method_idnum());
2348 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2349
2350 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2351 // klass owning the symbols alive so their refcounts aren't decremented.
2352 Symbol* name = method->name();
2353 _names->symbol_at_put(_index, name);
2354
2355 // We need to save the mirrors in the backtrace to keep the class
2356 // from being unloaded while we still have this stack trace.
2357 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2358 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2359
2360 _index++;
2361 }
2362
2363 void set_has_hidden_top_frame() {
2364 if (!_has_hidden_top_frame) {
2365 // It would be nice to add java/lang/Boolean::TRUE here
2366 // to indicate that this backtrace has a hidden top frame.
2367 // But this code is used before TRUE is allocated.
2368 // Therefore let's just use an arbitrary legal oop
2369 // available right here. _methods is a short[].
2370 assert(_methods != nullptr, "we need a legal oop");
2371 _has_hidden_top_frame = true;
2372 _head->obj_at_put(trace_hidden_offset, _methods);
2373 }
2374 }
2375 };
2376
2377 struct BacktraceElement : public StackObj {
2378 int _method_id;
2379 int _bci;
2380 int _version;
2381 Symbol* _name;
2382 Handle _mirror;
2383 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2384 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2385 };
2386
2387 class BacktraceIterator : public StackObj {
2388 int _index;
2389 objArrayHandle _result;
2390 objArrayHandle _mirrors;
2391 typeArrayHandle _methods;
2392 typeArrayHandle _bcis;
2393 typeArrayHandle _names;
2394
2395 void init(objArrayHandle result, Thread* thread) {
2396 // Get method id, bci, version and mirror from chunk
2397 _result = result;
2398 if (_result.not_null()) {
2399 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2400 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2401 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2402 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2403 _index = 0;
2404 }
2405 }
2406 public:
2407 BacktraceIterator(objArrayHandle result, Thread* thread) {
2408 init(result, thread);
2409 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2410 }
2411
2412 BacktraceElement next(Thread* thread) {
2413 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2414 _methods->ushort_at(_index),
2415 Backtrace::version_at(_bcis->int_at(_index)),
2416 Backtrace::bci_at(_bcis->int_at(_index)),
2417 _names->symbol_at(_index));
2418 _index++;
2419
2420 if (_index >= java_lang_Throwable::trace_chunk_size) {
2421 int next_offset = java_lang_Throwable::trace_next_offset;
2422 // Get next chunk
2423 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2424 init(result, thread);
2425 }
2426 return e;
2427 }
2428
2429 bool repeat() {
2430 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2431 }
2432 };
2433
2434
2435 // Print stack trace element to resource allocated buffer
2436 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2437 int version, int bci, Symbol* name) {
2438 ResourceMark rm;
2439
2440 // Get strings and string lengths
2441 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2442 const char* klass_name = holder->external_name();
2443 int buf_len = (int)strlen(klass_name);
2444
2445 char* method_name = name->as_C_string();
2446 buf_len += (int)strlen(method_name);
2447
2448 char* source_file_name = nullptr;
2449 Symbol* source = Backtrace::get_source_file_name(holder, version);
2450 if (source != nullptr) {
2451 source_file_name = source->as_C_string();
2452 buf_len += (int)strlen(source_file_name);
2453 }
2454
2455 char *module_name = nullptr, *module_version = nullptr;
2456 ModuleEntry* module = holder->module();
2457 if (module->is_named()) {
2458 module_name = module->name()->as_C_string();
2459 buf_len += (int)strlen(module_name);
2460 if (module->version() != nullptr) {
2461 module_version = module->version()->as_C_string();
2462 buf_len += (int)strlen(module_version);
2463 }
2464 }
2465
2466 // Allocate temporary buffer with extra space for formatting and line number
2467 const size_t buf_size = buf_len + 64;
2468 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2469
2470 // Print stack trace line in buffer
2471 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2472
2473 // Print module information
2474 if (module_name != nullptr) {
2475 if (module_version != nullptr) {
2476 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2477 } else {
2478 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2479 }
2480 }
2481
2482 // The method can be null if the requested class version is gone
2483 Method* method = holder->method_with_orig_idnum(method_id, version);
2484 if (!version_matches(method, version)) {
2485 strcat(buf, "Redefined)");
2486 } else {
2487 int line_number = Backtrace::get_line_number(method, bci);
2488 if (line_number == -2) {
2489 strcat(buf, "Native Method)");
2490 } else {
2491 if (source_file_name != nullptr && (line_number != -1)) {
2492 // Sourcename and linenumber
2493 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2494 } else if (source_file_name != nullptr) {
2495 // Just sourcename
2496 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2497 } else {
2498 // Neither sourcename nor linenumber
2499 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2500 }
2501 nmethod* nm = method->code();
2502 if (WizardMode && nm != nullptr) {
2503 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2504 }
2505 }
2506 }
2507
2508 st->print_cr("%s", buf);
2509 }
2510
2511 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2512 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2513 int method_id = method->orig_method_idnum();
2514 int version = method->constants()->version();
2515 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2516 }
2517
2518 /**
2519 * Print the throwable message and its stack trace plus all causes by walking the
2520 * cause chain. The output looks the same as of Throwable.printStackTrace().
2521 */
2522 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2523 // First, print the message.
2524 print(throwable(), st);
2525 st->cr();
2526
2527 // Now print the stack trace.
2528 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2529 while (throwable.not_null()) {
2530 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2531 if (result.is_null()) {
2532 st->print_raw_cr("\t<<no stack trace available>>");
2533 return;
2534 }
2535 BacktraceIterator iter(result, THREAD);
2536
2537 while (iter.repeat()) {
2538 BacktraceElement bte = iter.next(THREAD);
2539 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2540 }
2541 if (THREAD->can_call_java()) {
2542 // Call getCause() which doesn't necessarily return the _cause field.
2543 ExceptionMark em(THREAD);
2544 JavaValue cause(T_OBJECT);
2545 JavaCalls::call_virtual(&cause,
2546 throwable,
2547 throwable->klass(),
2548 vmSymbols::getCause_name(),
2549 vmSymbols::void_throwable_signature(),
2550 THREAD);
2551 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2552 if (HAS_PENDING_EXCEPTION) {
2553 CLEAR_PENDING_EXCEPTION;
2554 throwable = Handle();
2555 } else {
2556 throwable = Handle(THREAD, cause.get_oop());
2557 if (throwable.not_null()) {
2558 st->print("Caused by: ");
2559 print(throwable(), st);
2560 st->cr();
2561 }
2562 }
2563 } else {
2564 st->print_raw_cr("<<cannot call Java to get cause>>");
2565 return;
2566 }
2567 }
2568 }
2569
2570 /**
2571 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2572 */
2573 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2574 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2575 JavaValue result(T_VOID);
2576 JavaCalls::call_virtual(&result,
2577 throwable,
2578 vmClasses::Throwable_klass(),
2579 vmSymbols::printStackTrace_name(),
2580 vmSymbols::void_method_signature(),
2581 THREAD);
2582 }
2583
2584 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2585 if (!StackTraceInThrowable) return;
2586 ResourceMark rm(THREAD);
2587
2588 // Start out by clearing the backtrace for this object, in case the VM
2589 // runs out of memory while allocating the stack trace
2590 set_backtrace(throwable(), nullptr);
2591 // Clear lazily constructed Java level stacktrace if refilling occurs
2592 // This is unnecessary in 1.7+ but harmless
2593 clear_stacktrace(throwable());
2594
2595 int max_depth = MaxJavaStackTraceDepth;
2596 JavaThread* thread = THREAD;
2597
2598 BacktraceBuilder bt(CHECK);
2599
2600 // If there is no Java frame just return the method that was being called
2601 // with bci 0
2602 if (!thread->has_last_Java_frame()) {
2603 if (max_depth >= 1 && method() != nullptr) {
2604 bt.push(method(), 0, CHECK);
2605 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2606 set_depth(throwable(), 1);
2607 set_backtrace(throwable(), bt.backtrace());
2608 }
2609 return;
2610 }
2611
2612 // Instead of using vframe directly, this version of fill_in_stack_trace
2613 // basically handles everything by hand. This significantly improved the
2614 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2615 // See bug 6333838 for more details.
2616 // The "ASSERT" here is to verify this method generates the exactly same stack
2617 // trace as utilizing vframe.
2618 #ifdef ASSERT
2619 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2620 #endif
2621 int total_count = 0;
2622 RegisterMap map(thread,
2623 RegisterMap::UpdateMap::skip,
2624 RegisterMap::ProcessFrames::skip,
2625 RegisterMap::WalkContinuation::include);
2626 int decode_offset = 0;
2627 nmethod* nm = nullptr;
2628 bool skip_fillInStackTrace_check = false;
2629 bool skip_throwableInit_check = false;
2630 bool skip_hidden = !ShowHiddenFrames;
2631 bool show_carrier = ShowCarrierFrames;
2632 ContinuationEntry* cont_entry = thread->last_continuation();
2633 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2634 Method* method = nullptr;
2635 int bci = 0;
2636
2637 // Compiled java method case.
2638 if (decode_offset != 0) {
2639 DebugInfoReadStream stream(nm, decode_offset);
2640 decode_offset = stream.read_int();
2641 method = (Method*)nm->metadata_at(stream.read_int());
2642 bci = stream.read_bci();
2643 } else {
2644 if (fr.is_first_frame()) break;
2645
2646 if (Continuation::is_continuation_enterSpecial(fr)) {
2647 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2648 if (!show_carrier && cont_entry->is_virtual_thread()) {
2649 break;
2650 }
2651 cont_entry = cont_entry->parent();
2652 }
2653
2654 address pc = fr.pc();
2655 if (fr.is_interpreted_frame()) {
2656 address bcp;
2657 if (!map.in_cont()) {
2658 bcp = fr.interpreter_frame_bcp();
2659 method = fr.interpreter_frame_method();
2660 } else {
2661 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2662 method = map.stack_chunk()->interpreter_frame_method(fr);
2663 }
2664 bci = method->bci_from(bcp);
2665 fr = fr.sender(&map);
2666 } else {
2667 CodeBlob* cb = fr.cb();
2668 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2669 // but non nmethod
2670 fr = fr.sender(&map);
2671 if (cb == nullptr || !cb->is_nmethod()) {
2672 continue;
2673 }
2674 nm = cb->as_nmethod();
2675 assert(nm->method() != nullptr, "must be");
2676 if (nm->method()->is_native()) {
2677 method = nm->method();
2678 bci = 0;
2679 } else {
2680 PcDesc* pd = nm->pc_desc_at(pc);
2681 decode_offset = pd->scope_decode_offset();
2682 // if decode_offset is not equal to 0, it will execute the
2683 // "compiled java method case" at the beginning of the loop.
2684 continue;
2685 }
2686 }
2687 }
2688 #ifdef ASSERT
2689 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2690 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2691 st.next();
2692 }
2693 #endif
2694
2695 // the format of the stacktrace will be:
2696 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2697 // - 0 or more <init> methods for the exception class (skipped)
2698 // - rest of the stack
2699
2700 if (!skip_fillInStackTrace_check) {
2701 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2702 throwable->is_a(method->method_holder())) {
2703 continue;
2704 }
2705 else {
2706 skip_fillInStackTrace_check = true; // gone past them all
2707 }
2708 }
2709 if (!skip_throwableInit_check) {
2710 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2711
2712 // skip <init> methods of the exception class and superclasses
2713 // This is similar to classic VM.
2714 if (method->is_object_constructor() &&
2715 throwable->is_a(method->method_holder())) {
2716 continue;
2717 } else {
2718 // there are none or we've seen them all - either way stop checking
2719 skip_throwableInit_check = true;
2720 }
2721 }
2722 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2723 if (skip_hidden) {
2724 if (total_count == 0) {
2725 // The top frame will be hidden from the stack trace.
2726 bt.set_has_hidden_top_frame();
2727 }
2728 continue;
2729 }
2730 }
2731
2732 bt.push(method, bci, CHECK);
2733 total_count++;
2734 }
2735
2736 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2737
2738 // Put completed stack trace into throwable object
2739 set_backtrace(throwable(), bt.backtrace());
2740 set_depth(throwable(), total_count);
2741 }
2742
2743 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2744 // No-op if stack trace is disabled
2745 if (!StackTraceInThrowable) {
2746 return;
2747 }
2748
2749 // Disable stack traces for some preallocated out of memory errors
2750 if (!Universe::should_fill_in_stack_trace(throwable)) {
2751 return;
2752 }
2753
2754 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2755 PreserveExceptionMark pm(THREAD);
2756
2757 fill_in_stack_trace(throwable, method, THREAD);
2758 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2759 // original exception via the PreserveExceptionMark destructor.
2760 CLEAR_PENDING_EXCEPTION;
2761 }
2762
2763 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2764 // Allocate stack trace - backtrace is created but not filled in
2765
2766 // No-op if stack trace is disabled
2767 if (!StackTraceInThrowable) return;
2768 BacktraceBuilder bt(CHECK); // creates a backtrace
2769 set_backtrace(throwable(), bt.backtrace());
2770 }
2771
2772
2773 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2774 // Fill in stack trace into preallocated backtrace (no GC)
2775
2776 // No-op if stack trace is disabled
2777 if (!StackTraceInThrowable) return;
2778
2779 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2780
2781 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2782
2783 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2784 assert(backtrace.not_null(), "backtrace should have been preallocated");
2785
2786 ResourceMark rm(THREAD);
2787 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2788
2789 BacktraceBuilder bt(THREAD, backtrace);
2790
2791 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2792 // methods as preallocated errors aren't created by "java" code.
2793
2794 // fill in as much stack trace as possible
2795 int chunk_count = 0;
2796 for (;!st.at_end(); st.next()) {
2797 bt.push(st.method(), st.bci(), CHECK);
2798 chunk_count++;
2799
2800 // Bail-out for deep stacks
2801 if (chunk_count >= trace_chunk_size) break;
2802 }
2803 set_depth(throwable(), chunk_count);
2804 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2805
2806 // We support the Throwable immutability protocol defined for Java 7.
2807 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2808 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2809 }
2810
2811 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2812 objArrayHandle stack_trace_array_h, TRAPS) {
2813
2814 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2815 THROW(vmSymbols::java_lang_NullPointerException());
2816 }
2817
2818 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2819
2820 if (stack_trace_array_h->length() != depth) {
2821 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2822 }
2823
2824 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2825 BacktraceIterator iter(result, THREAD);
2826
2827 int index = 0;
2828 while (iter.repeat()) {
2829 BacktraceElement bte = iter.next(THREAD);
2830
2831 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2832
2833 if (stack_trace_element.is_null()) {
2834 THROW(vmSymbols::java_lang_NullPointerException());
2835 }
2836
2837 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2838 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2839
2840 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2841 method,
2842 bte._version,
2843 bte._bci,
2844 bte._name,
2845 CHECK);
2846 }
2847 }
2848
2849 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2850 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2851 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2852 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2853 // symbolic stacktrace of 'throwable'.
2854 assert(throwable.not_null(), "shouldn't be");
2855
2856 // Now create the message from the original exception and thread name.
2857 ResourceMark rm(current);
2858 const char *message = nullptr;
2859 oop detailed_message = java_lang_Throwable::message(throwable());
2860 if (detailed_message != nullptr) {
2861 message = java_lang_String::as_utf8_string(detailed_message);
2862 }
2863 stringStream st;
2864 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2865 message == nullptr ? "" : ":");
2866 if (message == nullptr) {
2867 st.print("[in thread \"%s\"]", current->name());
2868 } else {
2869 st.print("%s [in thread \"%s\"]", message, current->name());
2870 }
2871
2872 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2873 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2874 // If new_exception returns a different exception while creating the exception,
2875 // abandon the attempt to save the initialization error and return null.
2876 if (init_error->klass()->name() != exception_name) {
2877 log_info(class, init)("Exception %s thrown while saving initialization exception",
2878 init_error->klass()->external_name());
2879 return Handle();
2880 }
2881
2882 // Call to java to fill in the stack trace and clear declaringClassObject to
2883 // not keep classes alive in the stack trace.
2884 // call this: public StackTraceElement[] getStackTrace()
2885 JavaValue result(T_ARRAY);
2886 JavaCalls::call_virtual(&result, throwable,
2887 vmClasses::Throwable_klass(),
2888 vmSymbols::getStackTrace_name(),
2889 vmSymbols::getStackTrace_signature(),
2890 current);
2891 if (!current->has_pending_exception()){
2892 Handle stack_trace(current, result.get_oop());
2893 assert(stack_trace->is_objArray(), "Should be an array");
2894 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2895 // Clear backtrace because the stacktrace should be used instead.
2896 set_backtrace(init_error(), nullptr);
2897 } else {
2898 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2899 init_error->klass()->external_name());
2900 current->clear_pending_exception();
2901 }
2902
2903 return init_error;
2904 }
2905
2906 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2907 JavaThread* current = JavaThread::current();
2908 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2909 BacktraceIterator iter(result, current);
2910 // No backtrace available.
2911 if (!iter.repeat()) return false;
2912
2913 // If the exception happened in a frame that has been hidden, i.e.,
2914 // omitted from the back trace, we can not compute the message.
2915 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2916 if (hidden != nullptr) {
2917 return false;
2918 }
2919
2920 // Get first backtrace element.
2921 BacktraceElement bte = iter.next(current);
2922
2923 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2924 assert(holder != nullptr, "first element should be non-null");
2925 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2926
2927 // Original version is no longer available.
2928 if (m == nullptr || !version_matches(m, bte._version)) {
2929 return false;
2930 }
2931
2932 *method = m;
2933 *bci = bte._bci;
2934 return true;
2935 }
2936
2937 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2938 // Allocate java.lang.StackTraceElement instance
2939 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2940 assert(k != nullptr, "must be loaded in 1.4+");
2941 if (k->should_be_initialized()) {
2942 k->initialize(CHECK_NULL);
2943 }
2944
2945 Handle element = k->allocate_instance_handle(CHECK_NULL);
2946
2947 int version = method->constants()->version();
2948 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2949 return element();
2950 }
2951
2952 void java_lang_StackTraceElement::fill_in(Handle element,
2953 InstanceKlass* holder, const methodHandle& method,
2954 int version, int bci, Symbol* name, TRAPS) {
2955 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2956
2957 ResourceMark rm(THREAD);
2958 HandleMark hm(THREAD);
2959
2960 // Fill in class name
2961 Handle java_class(THREAD, holder->java_mirror());
2962 oop classname = java_lang_Class::name(java_class, CHECK);
2963 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2964 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2965
2966 oop loader = holder->class_loader();
2967 if (loader != nullptr) {
2968 oop loader_name = java_lang_ClassLoader::name(loader);
2969 if (loader_name != nullptr)
2970 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2971 }
2972
2973 // Fill in method name
2974 oop methodname = StringTable::intern(name, CHECK);
2975 java_lang_StackTraceElement::set_methodName(element(), methodname);
2976
2977 // Fill in module name and version
2978 ModuleEntry* module = holder->module();
2979 if (module->is_named()) {
2980 oop module_name = StringTable::intern(module->name(), CHECK);
2981 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2982 oop module_version;
2983 if (module->version() != nullptr) {
2984 module_version = StringTable::intern(module->version(), CHECK);
2985 } else {
2986 module_version = nullptr;
2987 }
2988 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2989 }
2990
2991 if (method() == nullptr || !version_matches(method(), version)) {
2992 // The method was redefined, accurate line number information isn't available
2993 java_lang_StackTraceElement::set_fileName(element(), nullptr);
2994 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2995 } else {
2996 Symbol* source;
2997 oop source_file;
2998 int line_number;
2999 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3000
3001 java_lang_StackTraceElement::set_fileName(element(), source_file);
3002 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3003 }
3004 }
3005
3006 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3007 InstanceKlass* holder,
3008 int version,
3009 const methodHandle& method,
3010 int bci,
3011 Symbol*& source,
3012 oop& source_file,
3013 int& line_number, TRAPS) {
3014 // Fill in source file name and line number.
3015 source = Backtrace::get_source_file_name(holder, version);
3016 source_file = java_lang_Class::source_file(java_class());
3017 if (source != nullptr) {
3018 // Class was not redefined. We can trust its cache if set,
3019 // else we have to initialize it.
3020 if (source_file == nullptr) {
3021 source_file = StringTable::intern(source, CHECK);
3022 java_lang_Class::set_source_file(java_class(), source_file);
3023 }
3024 } else {
3025 // Class was redefined. Dump the cache if it was set.
3026 if (source_file != nullptr) {
3027 source_file = nullptr;
3028 java_lang_Class::set_source_file(java_class(), source_file);
3029 }
3030 }
3031 line_number = Backtrace::get_line_number(method(), bci);
3032 }
3033
3034 #if INCLUDE_JVMCI
3035 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3036 Symbol*& filename, int& line_number, TRAPS) {
3037 ResourceMark rm(THREAD);
3038 HandleMark hm(THREAD);
3039
3040 filename = nullptr;
3041 line_number = -1;
3042
3043 oop source_file;
3044 int version = method->constants()->version();
3045 InstanceKlass* holder = method->method_holder();
3046 Handle java_class(THREAD, holder->java_mirror());
3047 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3048 }
3049 #endif // INCLUDE_JVMCI
3050
3051 // java_lang_ClassFrameInfo
3052
3053 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3054 int java_lang_ClassFrameInfo::_flags_offset;
3055
3056 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3057 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3058 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3059
3060 void java_lang_ClassFrameInfo::compute_offsets() {
3061 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3062 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3063 }
3064
3065 #if INCLUDE_CDS
3066 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3067 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3068 }
3069 #endif
3070
3071 static int get_flags(const methodHandle& m) {
3072 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
3073 if (m->is_object_constructor()) {
3074 flags |= java_lang_invoke_MemberName::MN_IS_OBJECT_CONSTRUCTOR;
3075 } else {
3076 // Note: Static initializers can be here. Record them as plain methods.
3077 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3078 }
3079 if (m->caller_sensitive()) {
3080 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3081 }
3082 if (m->is_hidden()) {
3083 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3084 }
3085 assert((flags & 0xFF000000) == 0, "unexpected flags");
3086 return flags;
3087 }
3088
3089 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3090 return obj->obj_field(_classOrMemberName_offset);
3091 }
3092
3093 int java_lang_ClassFrameInfo::flags(oop obj) {
3094 return obj->int_field(_flags_offset);
3095 }
3096
3097 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3098 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3099 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3100 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3101 stackFrame->int_field_put(_flags_offset, flags);
3102 }
3103
3104 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3105 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3106 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3107 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3108 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3109 stackFrame->int_field_put(_flags_offset, flags);
3110 }
3111
3112
3113 // java_lang_StackFrameInfo
3114
3115 int java_lang_StackFrameInfo::_type_offset;
3116 int java_lang_StackFrameInfo::_name_offset;
3117 int java_lang_StackFrameInfo::_bci_offset;
3118 int java_lang_StackFrameInfo::_version_offset;
3119 int java_lang_StackFrameInfo::_contScope_offset;
3120
3121 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3122 macro(_type_offset, k, "type", object_signature, false); \
3123 macro(_name_offset, k, "name", string_signature, false); \
3124 macro(_bci_offset, k, "bci", int_signature, false); \
3125 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3126
3127 void java_lang_StackFrameInfo::compute_offsets() {
3128 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3129 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3130 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3131 }
3132
3133 #if INCLUDE_CDS
3134 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3135 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3136 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3137 }
3138 #endif
3139
3140 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3141 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3142 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3143 return method;
3144 }
3145
3146 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3147 // set Method* or mid/cpref
3148 HandleMark hm(THREAD);
3149 Handle cont_h(THREAD, cont);
3150 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3151
3152 // set bci
3153 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3154 // method may be redefined; store the version
3155 int version = method->constants()->version();
3156 assert((jushort)version == version, "version should be short");
3157 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3158
3159 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3160 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3161 }
3162
3163 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3164 ResourceMark rm(THREAD);
3165 HandleMark hm(THREAD);
3166
3167 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3168 InstanceKlass* holder = method->method_holder();
3169 short version = stackFrame->short_field(_version_offset);
3170 int bci = stackFrame->int_field(_bci_offset);
3171 Symbol* name = method->name();
3172 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3173 }
3174
3175 oop java_lang_StackFrameInfo::type(oop obj) {
3176 return obj->obj_field(_type_offset);
3177 }
3178
3179 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3180 obj->obj_field_put(_type_offset, value);
3181 }
3182
3183 oop java_lang_StackFrameInfo::name(oop obj) {
3184 return obj->obj_field(_name_offset);
3185 }
3186
3187 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3188 obj->obj_field_put(_name_offset, value);
3189 }
3190
3191 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3192 obj->short_field_put(_version_offset, value);
3193 }
3194
3195 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3196 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3197 obj->int_field_put(_bci_offset, value);
3198 }
3199
3200 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3201 obj->obj_field_put(_contScope_offset, value);
3202 }
3203
3204 int java_lang_LiveStackFrameInfo::_monitors_offset;
3205 int java_lang_LiveStackFrameInfo::_locals_offset;
3206 int java_lang_LiveStackFrameInfo::_operands_offset;
3207 int java_lang_LiveStackFrameInfo::_mode_offset;
3208
3209 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3210 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3211 macro(_locals_offset, k, "locals", object_array_signature, false); \
3212 macro(_operands_offset, k, "operands", object_array_signature, false); \
3213 macro(_mode_offset, k, "mode", int_signature, false)
3214
3215 void java_lang_LiveStackFrameInfo::compute_offsets() {
3216 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3217 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3218 }
3219
3220 #if INCLUDE_CDS
3221 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3222 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3223 }
3224 #endif
3225
3226 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3227 obj->obj_field_put(_monitors_offset, value);
3228 }
3229
3230 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3231 obj->obj_field_put(_locals_offset, value);
3232 }
3233
3234 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3235 obj->obj_field_put(_operands_offset, value);
3236 }
3237
3238 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3239 obj->int_field_put(_mode_offset, value);
3240 }
3241
3242
3243 // java_lang_AccessibleObject
3244
3245 int java_lang_reflect_AccessibleObject::_override_offset;
3246
3247 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3248 macro(_override_offset, k, "override", bool_signature, false)
3249
3250 void java_lang_reflect_AccessibleObject::compute_offsets() {
3251 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3252 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3253 }
3254
3255 #if INCLUDE_CDS
3256 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3257 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3258 }
3259 #endif
3260
3261 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3262 return (jboolean) reflect->bool_field(_override_offset);
3263 }
3264
3265 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3266 reflect->bool_field_put(_override_offset, (int) value);
3267 }
3268
3269 // java_lang_reflect_Method
3270
3271 int java_lang_reflect_Method::_clazz_offset;
3272 int java_lang_reflect_Method::_name_offset;
3273 int java_lang_reflect_Method::_returnType_offset;
3274 int java_lang_reflect_Method::_parameterTypes_offset;
3275 int java_lang_reflect_Method::_exceptionTypes_offset;
3276 int java_lang_reflect_Method::_slot_offset;
3277 int java_lang_reflect_Method::_modifiers_offset;
3278 int java_lang_reflect_Method::_signature_offset;
3279 int java_lang_reflect_Method::_annotations_offset;
3280 int java_lang_reflect_Method::_parameter_annotations_offset;
3281 int java_lang_reflect_Method::_annotation_default_offset;
3282
3283 #define METHOD_FIELDS_DO(macro) \
3284 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3285 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3286 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3287 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3288 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3289 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3290 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3291 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3292 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3293 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3294 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3295
3296 void java_lang_reflect_Method::compute_offsets() {
3297 InstanceKlass* k = vmClasses::reflect_Method_klass();
3298 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3299 }
3300
3301 #if INCLUDE_CDS
3302 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3303 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3304 }
3305 #endif
3306
3307 Handle java_lang_reflect_Method::create(TRAPS) {
3308 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3309 Klass* klass = vmClasses::reflect_Method_klass();
3310 // This class is eagerly initialized during VM initialization, since we keep a reference
3311 // to one of the methods
3312 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3313 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3314 }
3315
3316 oop java_lang_reflect_Method::clazz(oop reflect) {
3317 return reflect->obj_field(_clazz_offset);
3318 }
3319
3320 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3321 reflect->obj_field_put(_clazz_offset, value);
3322 }
3323
3324 int java_lang_reflect_Method::slot(oop reflect) {
3325 return reflect->int_field(_slot_offset);
3326 }
3327
3328 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3329 reflect->int_field_put(_slot_offset, value);
3330 }
3331
3332 void java_lang_reflect_Method::set_name(oop method, oop value) {
3333 method->obj_field_put(_name_offset, value);
3334 }
3335
3336 oop java_lang_reflect_Method::return_type(oop method) {
3337 return method->obj_field(_returnType_offset);
3338 }
3339
3340 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3341 method->obj_field_put(_returnType_offset, value);
3342 }
3343
3344 oop java_lang_reflect_Method::parameter_types(oop method) {
3345 return method->obj_field(_parameterTypes_offset);
3346 }
3347
3348 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3349 method->obj_field_put(_parameterTypes_offset, value);
3350 }
3351
3352 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3353 method->obj_field_put(_exceptionTypes_offset, value);
3354 }
3355
3356 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3357 method->int_field_put(_modifiers_offset, value);
3358 }
3359
3360 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3361 method->obj_field_put(_signature_offset, value);
3362 }
3363
3364 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3365 method->obj_field_put(_annotations_offset, value);
3366 }
3367
3368 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3369 method->obj_field_put(_parameter_annotations_offset, value);
3370 }
3371
3372 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3373 method->obj_field_put(_annotation_default_offset, value);
3374 }
3375
3376 int java_lang_reflect_Constructor::_clazz_offset;
3377 int java_lang_reflect_Constructor::_parameterTypes_offset;
3378 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3379 int java_lang_reflect_Constructor::_slot_offset;
3380 int java_lang_reflect_Constructor::_modifiers_offset;
3381 int java_lang_reflect_Constructor::_signature_offset;
3382 int java_lang_reflect_Constructor::_annotations_offset;
3383 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3384
3385 #define CONSTRUCTOR_FIELDS_DO(macro) \
3386 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3387 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3388 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_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(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3392 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3393 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3394
3395 void java_lang_reflect_Constructor::compute_offsets() {
3396 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3397 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3398 }
3399
3400 #if INCLUDE_CDS
3401 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3402 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3403 }
3404 #endif
3405
3406 Handle java_lang_reflect_Constructor::create(TRAPS) {
3407 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3408 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
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_Constructor::clazz(oop reflect) {
3417 return reflect->obj_field(_clazz_offset);
3418 }
3419
3420 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3421 reflect->obj_field_put(_clazz_offset, value);
3422 }
3423
3424 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3425 return constructor->obj_field(_parameterTypes_offset);
3426 }
3427
3428 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3429 constructor->obj_field_put(_parameterTypes_offset, value);
3430 }
3431
3432 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3433 constructor->obj_field_put(_exceptionTypes_offset, value);
3434 }
3435
3436 int java_lang_reflect_Constructor::slot(oop reflect) {
3437 return reflect->int_field(_slot_offset);
3438 }
3439
3440 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3441 reflect->int_field_put(_slot_offset, value);
3442 }
3443
3444 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3445 constructor->int_field_put(_modifiers_offset, value);
3446 }
3447
3448 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3449 constructor->obj_field_put(_signature_offset, value);
3450 }
3451
3452 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3453 constructor->obj_field_put(_annotations_offset, value);
3454 }
3455
3456 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3457 method->obj_field_put(_parameter_annotations_offset, value);
3458 }
3459
3460 int java_lang_reflect_Field::_clazz_offset;
3461 int java_lang_reflect_Field::_name_offset;
3462 int java_lang_reflect_Field::_type_offset;
3463 int java_lang_reflect_Field::_slot_offset;
3464 int java_lang_reflect_Field::_modifiers_offset;
3465 int java_lang_reflect_Field::_flags_offset;
3466 int java_lang_reflect_Field::_signature_offset;
3467 int java_lang_reflect_Field::_annotations_offset;
3468
3469 #define FIELD_FIELDS_DO(macro) \
3470 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3471 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3472 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3473 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3474 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3475 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3476 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3477 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3478
3479 void java_lang_reflect_Field::compute_offsets() {
3480 InstanceKlass* k = vmClasses::reflect_Field_klass();
3481 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3482 }
3483
3484 #if INCLUDE_CDS
3485 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3486 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3487 }
3488 #endif
3489
3490 Handle java_lang_reflect_Field::create(TRAPS) {
3491 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3492 Symbol* name = vmSymbols::java_lang_reflect_Field();
3493 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3494 InstanceKlass* ik = InstanceKlass::cast(k);
3495 // Ensure it is initialized
3496 ik->initialize(CHECK_NH);
3497 return ik->allocate_instance_handle(THREAD);
3498 }
3499
3500 oop java_lang_reflect_Field::clazz(oop reflect) {
3501 return reflect->obj_field(_clazz_offset);
3502 }
3503
3504 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3505 reflect->obj_field_put(_clazz_offset, value);
3506 }
3507
3508 oop java_lang_reflect_Field::name(oop field) {
3509 return field->obj_field(_name_offset);
3510 }
3511
3512 void java_lang_reflect_Field::set_name(oop field, oop value) {
3513 field->obj_field_put(_name_offset, value);
3514 }
3515
3516 oop java_lang_reflect_Field::type(oop field) {
3517 return field->obj_field(_type_offset);
3518 }
3519
3520 void java_lang_reflect_Field::set_type(oop field, oop value) {
3521 field->obj_field_put(_type_offset, value);
3522 }
3523
3524 int java_lang_reflect_Field::slot(oop reflect) {
3525 return reflect->int_field(_slot_offset);
3526 }
3527
3528 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3529 reflect->int_field_put(_slot_offset, value);
3530 }
3531
3532 int java_lang_reflect_Field::modifiers(oop field) {
3533 return field->int_field(_modifiers_offset);
3534 }
3535
3536 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3537 field->int_field_put(_modifiers_offset, value);
3538 }
3539
3540 void java_lang_reflect_Field::set_flags(oop field, int value) {
3541 field->int_field_put(_flags_offset, value);
3542 }
3543
3544 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3545 field->obj_field_put(_signature_offset, value);
3546 }
3547
3548 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3549 field->obj_field_put(_annotations_offset, value);
3550 }
3551
3552 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3553 // Allocate java.lang.reflect.RecordComponent instance
3554 HandleMark hm(THREAD);
3555 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3556 assert(ik != nullptr, "must be loaded");
3557 ik->initialize(CHECK_NULL);
3558
3559 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3560
3561 Handle decl_class(THREAD, holder->java_mirror());
3562 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3563
3564 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3565 oop component_name = StringTable::intern(name, CHECK_NULL);
3566 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3567
3568 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3569 Handle component_type_h =
3570 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3571 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3572
3573 Method* accessor_method = nullptr;
3574 {
3575 // Prepend "()" to type to create the full method signature.
3576 ResourceMark rm(THREAD);
3577 int sig_len = type->utf8_length() + 3; // "()" and null char
3578 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3579 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3580 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3581 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3582 }
3583
3584 if (accessor_method != nullptr) {
3585 methodHandle method(THREAD, accessor_method);
3586 oop m = Reflection::new_method(method, false, CHECK_NULL);
3587 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3588 } else {
3589 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3590 }
3591
3592 int sig_index = component->generic_signature_index();
3593 if (sig_index > 0) {
3594 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3595 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3596 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3597 } else {
3598 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3599 }
3600
3601 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3602 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3603
3604 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3605 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3606
3607 return element();
3608 }
3609
3610 int reflect_ConstantPool::_oop_offset;
3611
3612 #define CONSTANTPOOL_FIELDS_DO(macro) \
3613 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3614
3615 void reflect_ConstantPool::compute_offsets() {
3616 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3617 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3618 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3619 }
3620
3621 #if INCLUDE_CDS
3622 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3623 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3624 }
3625 #endif
3626
3627 int java_lang_reflect_Parameter::_name_offset;
3628 int java_lang_reflect_Parameter::_modifiers_offset;
3629 int java_lang_reflect_Parameter::_index_offset;
3630 int java_lang_reflect_Parameter::_executable_offset;
3631
3632 #define PARAMETER_FIELDS_DO(macro) \
3633 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3634 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3635 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3636 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3637
3638 void java_lang_reflect_Parameter::compute_offsets() {
3639 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3640 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3641 }
3642
3643 #if INCLUDE_CDS
3644 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3645 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3646 }
3647 #endif
3648
3649 Handle java_lang_reflect_Parameter::create(TRAPS) {
3650 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3651 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3652 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3653 InstanceKlass* ik = InstanceKlass::cast(k);
3654 // Ensure it is initialized
3655 ik->initialize(CHECK_NH);
3656 return ik->allocate_instance_handle(THREAD);
3657 }
3658
3659 oop java_lang_reflect_Parameter::name(oop param) {
3660 return param->obj_field(_name_offset);
3661 }
3662
3663 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3664 param->obj_field_put(_name_offset, value);
3665 }
3666
3667 int java_lang_reflect_Parameter::modifiers(oop param) {
3668 return param->int_field(_modifiers_offset);
3669 }
3670
3671 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3672 param->int_field_put(_modifiers_offset, value);
3673 }
3674
3675 int java_lang_reflect_Parameter::index(oop param) {
3676 return param->int_field(_index_offset);
3677 }
3678
3679 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3680 param->int_field_put(_index_offset, value);
3681 }
3682
3683 oop java_lang_reflect_Parameter::executable(oop param) {
3684 return param->obj_field(_executable_offset);
3685 }
3686
3687 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3688 param->obj_field_put(_executable_offset, value);
3689 }
3690
3691 // java_lang_Module
3692
3693 int java_lang_Module::_loader_offset;
3694 int java_lang_Module::_name_offset;
3695 int java_lang_Module::_module_entry_offset;
3696
3697 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3698 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3699 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3700 vmSymbols::java_lang_module_init_signature(),
3701 loader, module_name, CHECK_NH);
3702 }
3703
3704 #define MODULE_FIELDS_DO(macro) \
3705 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3706 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3707
3708 void java_lang_Module::compute_offsets() {
3709 InstanceKlass* k = vmClasses::Module_klass();
3710 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3711 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3712 }
3713
3714 #if INCLUDE_CDS
3715 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3716 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3717 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3718 }
3719 #endif
3720
3721 oop java_lang_Module::loader(oop module) {
3722 return module->obj_field(_loader_offset);
3723 }
3724
3725 void java_lang_Module::set_loader(oop module, oop value) {
3726 module->obj_field_put(_loader_offset, value);
3727 }
3728
3729 oop java_lang_Module::name(oop module) {
3730 return module->obj_field(_name_offset);
3731 }
3732
3733 void java_lang_Module::set_name(oop module, oop value) {
3734 module->obj_field_put(_name_offset, value);
3735 }
3736
3737 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3738 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3739 assert(module != nullptr, "module can't be null");
3740 assert(oopDesc::is_oop(module), "module must be oop");
3741
3742 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3743 return module_entry;
3744 }
3745
3746 ModuleEntry* java_lang_Module::module_entry(oop module) {
3747 ModuleEntry* module_entry = module_entry_raw(module);
3748 if (module_entry == nullptr) {
3749 // If the inject field containing the ModuleEntry* is null then return the
3750 // class loader's unnamed module.
3751 oop loader = java_lang_Module::loader(module);
3752 Handle h_loader = Handle(Thread::current(), loader);
3753 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3754 return loader_cld->unnamed_module();
3755 }
3756 return module_entry;
3757 }
3758
3759 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3760 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3761 assert(module != nullptr, "module can't be null");
3762 assert(oopDesc::is_oop(module), "module must be oop");
3763 module->address_field_put(_module_entry_offset, (address)module_entry);
3764 }
3765
3766 Handle reflect_ConstantPool::create(TRAPS) {
3767 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3768 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3769 // Ensure it is initialized
3770 k->initialize(CHECK_NH);
3771 return k->allocate_instance_handle(THREAD);
3772 }
3773
3774
3775 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3776 oop mirror = value->pool_holder()->java_mirror();
3777 // Save the mirror to get back the constant pool.
3778 reflect->obj_field_put(_oop_offset, mirror);
3779 }
3780
3781 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3782
3783 oop mirror = reflect->obj_field(_oop_offset);
3784 Klass* k = java_lang_Class::as_Klass(mirror);
3785 assert(k->is_instance_klass(), "Must be");
3786
3787 // Get the constant pool back from the klass. Since class redefinition
3788 // merges the new constant pool into the old, this is essentially the
3789 // same constant pool as the original. If constant pool merging is
3790 // no longer done in the future, this will have to change to save
3791 // the original.
3792 return InstanceKlass::cast(k)->constants();
3793 }
3794
3795
3796 // Support for java_lang_ref_Reference
3797
3798 bool java_lang_ref_Reference::_offsets_initialized;
3799
3800 int java_lang_ref_Reference::_referent_offset;
3801 int java_lang_ref_Reference::_queue_offset;
3802 int java_lang_ref_Reference::_next_offset;
3803 int java_lang_ref_Reference::_discovered_offset;
3804
3805 #define REFERENCE_FIELDS_DO(macro) \
3806 macro(_referent_offset, k, "referent", object_signature, false); \
3807 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3808 macro(_next_offset, k, "next", reference_signature, false); \
3809 macro(_discovered_offset, k, "discovered", reference_signature, false);
3810
3811 void java_lang_ref_Reference::compute_offsets() {
3812 if (_offsets_initialized) {
3813 return;
3814 }
3815 _offsets_initialized = true;
3816 InstanceKlass* k = vmClasses::Reference_klass();
3817 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3818 }
3819
3820 #if INCLUDE_CDS
3821 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3822 f->do_bool(&_offsets_initialized);
3823 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3824 }
3825 #endif
3826
3827 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3828 assert(obj != nullptr, "sanity");
3829 if (offset != _referent_offset) {
3830 return false;
3831 }
3832
3833 Klass* k = obj->klass();
3834 if (!k->is_instance_klass()) {
3835 return false;
3836 }
3837
3838 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3839 bool is_reference = ik->reference_type() != REF_NONE;
3840 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3841 return is_reference;
3842 }
3843
3844 int java_lang_boxing_object::_value_offset;
3845 int java_lang_boxing_object::_long_value_offset;
3846
3847 #define BOXING_FIELDS_DO(macro) \
3848 macro(_value_offset, byteKlass, "value", byte_signature, false); \
3849 macro(_long_value_offset, longKlass, "value", long_signature, false);
3850
3851 void java_lang_boxing_object::compute_offsets() {
3852 InstanceKlass* byteKlass = vmClasses::Byte_klass();
3853 InstanceKlass* longKlass = vmClasses::Long_klass();
3854 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3855 }
3856
3857 #if INCLUDE_CDS
3858 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3859 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3860 }
3861 #endif
3862
3863 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3864 Klass* k = vmClasses::box_klass(type);
3865 if (k == nullptr) return nullptr;
3866 InstanceKlass* ik = InstanceKlass::cast(k);
3867 if (!ik->is_initialized()) {
3868 ik->initialize(CHECK_NULL);
3869 }
3870 return ik->allocate_instance(THREAD);
3871 }
3872
3873
3874 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3875 oop box = initialize_and_allocate(type, CHECK_NULL);
3876 if (box == nullptr) return nullptr;
3877 switch (type) {
3878 case T_BOOLEAN:
3879 box->bool_field_put(_value_offset, value->z);
3880 break;
3881 case T_CHAR:
3882 box->char_field_put(_value_offset, value->c);
3883 break;
3884 case T_FLOAT:
3885 box->float_field_put(_value_offset, value->f);
3886 break;
3887 case T_DOUBLE:
3888 box->double_field_put(_long_value_offset, value->d);
3889 break;
3890 case T_BYTE:
3891 box->byte_field_put(_value_offset, value->b);
3892 break;
3893 case T_SHORT:
3894 box->short_field_put(_value_offset, value->s);
3895 break;
3896 case T_INT:
3897 box->int_field_put(_value_offset, value->i);
3898 break;
3899 case T_LONG:
3900 box->long_field_put(_long_value_offset, value->j);
3901 break;
3902 default:
3903 return nullptr;
3904 }
3905 return box;
3906 }
3907
3908
3909 BasicType java_lang_boxing_object::basic_type(oop box) {
3910 if (box == nullptr) return T_ILLEGAL;
3911 BasicType type = vmClasses::box_klass_type(box->klass());
3912 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3913 return T_ILLEGAL;
3914 return type;
3915 }
3916
3917
3918 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3919 BasicType type = vmClasses::box_klass_type(box->klass());
3920 switch (type) {
3921 case T_BOOLEAN:
3922 value->z = box->bool_field(_value_offset);
3923 break;
3924 case T_CHAR:
3925 value->c = box->char_field(_value_offset);
3926 break;
3927 case T_FLOAT:
3928 value->f = box->float_field(_value_offset);
3929 break;
3930 case T_DOUBLE:
3931 value->d = box->double_field(_long_value_offset);
3932 break;
3933 case T_BYTE:
3934 value->b = box->byte_field(_value_offset);
3935 break;
3936 case T_SHORT:
3937 value->s = box->short_field(_value_offset);
3938 break;
3939 case T_INT:
3940 value->i = box->int_field(_value_offset);
3941 break;
3942 case T_LONG:
3943 value->j = box->long_field(_long_value_offset);
3944 break;
3945 default:
3946 return T_ILLEGAL;
3947 } // end switch
3948 return type;
3949 }
3950
3951
3952 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3953 BasicType type = vmClasses::box_klass_type(box->klass());
3954 switch (type) {
3955 case T_BOOLEAN:
3956 box->bool_field_put(_value_offset, value->z);
3957 break;
3958 case T_CHAR:
3959 box->char_field_put(_value_offset, value->c);
3960 break;
3961 case T_FLOAT:
3962 box->float_field_put(_value_offset, value->f);
3963 break;
3964 case T_DOUBLE:
3965 box->double_field_put(_long_value_offset, value->d);
3966 break;
3967 case T_BYTE:
3968 box->byte_field_put(_value_offset, value->b);
3969 break;
3970 case T_SHORT:
3971 box->short_field_put(_value_offset, value->s);
3972 break;
3973 case T_INT:
3974 box->int_field_put(_value_offset, value->i);
3975 break;
3976 case T_LONG:
3977 box->long_field_put(_long_value_offset, value->j);
3978 break;
3979 default:
3980 return T_ILLEGAL;
3981 } // end switch
3982 return type;
3983 }
3984
3985
3986 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3987 switch (type) {
3988 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3989 case T_CHAR: st->print("%d", value->c); break;
3990 case T_BYTE: st->print("%d", value->b); break;
3991 case T_SHORT: st->print("%d", value->s); break;
3992 case T_INT: st->print("%d", value->i); break;
3993 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3994 case T_FLOAT: st->print("%f", value->f); break;
3995 case T_DOUBLE: st->print("%lf", value->d); break;
3996 default: st->print("type %d?", type); break;
3997 }
3998 }
3999
4000
4001 // Support for java_lang_ref_SoftReference
4002 //
4003
4004 int java_lang_ref_SoftReference::_timestamp_offset;
4005 int java_lang_ref_SoftReference::_static_clock_offset;
4006
4007 #define SOFTREFERENCE_FIELDS_DO(macro) \
4008 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4009 macro(_static_clock_offset, k, "clock", long_signature, true)
4010
4011 void java_lang_ref_SoftReference::compute_offsets() {
4012 InstanceKlass* k = vmClasses::SoftReference_klass();
4013 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4014 }
4015
4016 #if INCLUDE_CDS
4017 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4018 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4019 }
4020 #endif
4021
4022 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4023 return ref->long_field(_timestamp_offset);
4024 }
4025
4026 jlong java_lang_ref_SoftReference::clock() {
4027 InstanceKlass* ik = vmClasses::SoftReference_klass();
4028 oop base = ik->static_field_base_raw();
4029 return base->long_field(_static_clock_offset);
4030 }
4031
4032 void java_lang_ref_SoftReference::set_clock(jlong value) {
4033 InstanceKlass* ik = vmClasses::SoftReference_klass();
4034 oop base = ik->static_field_base_raw();
4035 base->long_field_put(_static_clock_offset, value);
4036 }
4037
4038 // Support for java_lang_invoke_DirectMethodHandle
4039
4040 int java_lang_invoke_DirectMethodHandle::_member_offset;
4041
4042 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4043 oop member_name = nullptr;
4044 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4045 "a DirectMethodHandle oop is expected");
4046 return dmh->obj_field(_member_offset);
4047 }
4048
4049 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4050 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4051
4052 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4053 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4054 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4055 }
4056
4057 #if INCLUDE_CDS
4058 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4059 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4060 }
4061 #endif
4062
4063 // Support for java_lang_invoke_MethodHandle
4064
4065 int java_lang_invoke_MethodHandle::_type_offset;
4066 int java_lang_invoke_MethodHandle::_form_offset;
4067
4068 int java_lang_invoke_MemberName::_clazz_offset;
4069 int java_lang_invoke_MemberName::_name_offset;
4070 int java_lang_invoke_MemberName::_type_offset;
4071 int java_lang_invoke_MemberName::_flags_offset;
4072 int java_lang_invoke_MemberName::_method_offset;
4073 int java_lang_invoke_MemberName::_vmindex_offset;
4074
4075 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4076 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4077
4078 int java_lang_invoke_LambdaForm::_vmentry_offset;
4079
4080 #define METHODHANDLE_FIELDS_DO(macro) \
4081 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4082 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4083
4084 void java_lang_invoke_MethodHandle::compute_offsets() {
4085 InstanceKlass* k = vmClasses::MethodHandle_klass();
4086 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4087 }
4088
4089 #if INCLUDE_CDS
4090 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4091 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4092 }
4093 #endif
4094
4095 #define MEMBERNAME_FIELDS_DO(macro) \
4096 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4097 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4098 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4099 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4100 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4101
4102 void java_lang_invoke_MemberName::compute_offsets() {
4103 InstanceKlass* k = vmClasses::MemberName_klass();
4104 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4105 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4106 }
4107
4108 #if INCLUDE_CDS
4109 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4110 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4111 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4112 }
4113 #endif
4114
4115 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4116 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4117
4118 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4119 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4120 assert(k != nullptr, "jdk mismatch");
4121 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4122 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4123 }
4124
4125 #if INCLUDE_CDS
4126 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4127 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4128 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4129 }
4130 #endif
4131
4132 #define LAMBDAFORM_FIELDS_DO(macro) \
4133 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4134
4135 void java_lang_invoke_LambdaForm::compute_offsets() {
4136 InstanceKlass* k = vmClasses::LambdaForm_klass();
4137 assert (k != nullptr, "jdk mismatch");
4138 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4139 }
4140
4141 #if INCLUDE_CDS
4142 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4143 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4144 }
4145 #endif
4146
4147 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4148 return obj != nullptr && is_subclass(obj->klass());
4149 }
4150
4151 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4152 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4153
4154 #define NEP_FIELDS_DO(macro) \
4155 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4156 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4157
4158 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4159 return obj != nullptr && is_subclass(obj->klass());
4160 }
4161
4162 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4163 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4164 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4165 }
4166
4167 #if INCLUDE_CDS
4168 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4169 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4170 }
4171 #endif
4172
4173 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4174 return entry->obj_field(_method_type_offset);
4175 }
4176
4177 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4178 return entry->long_field(_downcall_stub_address_offset);
4179 }
4180
4181 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4182 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4183 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4184 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4185 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4186 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4187 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4188
4189 #define ABIDescriptor_FIELDS_DO(macro) \
4190 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4191 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4192 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4193 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4194 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4195 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4196 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4197
4198 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4199 return obj != nullptr && is_subclass(obj->klass());
4200 }
4201
4202 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4203 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4204 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4205 }
4206
4207 #if INCLUDE_CDS
4208 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4209 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4210 }
4211 #endif
4212
4213 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4214 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4215 }
4216
4217 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4218 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4219 }
4220
4221 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4222 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4223 }
4224
4225 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4226 return entry->int_field(_stackAlignment_offset);
4227 }
4228
4229 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4230 return entry->int_field(_shadowSpace_offset);
4231 }
4232
4233 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4234 return entry->obj_field(_scratch1_offset);
4235 }
4236
4237 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4238 return entry->obj_field(_scratch2_offset);
4239 }
4240
4241 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4242 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4243 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4244 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4245
4246 #define VMStorage_FIELDS_DO(macro) \
4247 macro(_type_offset, k, "type", byte_signature, false); \
4248 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4249 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4250 macro(_debugName_offset, k, "debugName", string_signature, false); \
4251
4252 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4253 return obj != nullptr && is_subclass(obj->klass());
4254 }
4255
4256 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4257 InstanceKlass* k = vmClasses::VMStorage_klass();
4258 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4259 }
4260
4261 #if INCLUDE_CDS
4262 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4263 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4264 }
4265 #endif
4266
4267 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4268 return entry->byte_field(_type_offset);
4269 }
4270
4271 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4272 return entry->int_field(_indexOrOffset_offset);
4273 }
4274
4275 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4276 return entry->short_field(_segmentMaskOrSize_offset);
4277 }
4278
4279 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4280 return entry->obj_field(_debugName_offset);
4281 }
4282
4283 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4284 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4285
4286 #define CallConv_FIELDS_DO(macro) \
4287 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4288 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4289
4290 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4291 return obj != nullptr && is_subclass(obj->klass());
4292 }
4293
4294 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4295 InstanceKlass* k = vmClasses::CallConv_klass();
4296 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4297 }
4298
4299 #if INCLUDE_CDS
4300 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4301 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4302 }
4303 #endif
4304
4305 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4306 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4307 }
4308
4309 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4310 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4311 }
4312
4313 oop java_lang_invoke_MethodHandle::type(oop mh) {
4314 return mh->obj_field(_type_offset);
4315 }
4316
4317 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4318 mh->obj_field_put(_type_offset, mtype);
4319 }
4320
4321 oop java_lang_invoke_MethodHandle::form(oop mh) {
4322 assert(_form_offset != 0, "");
4323 return mh->obj_field(_form_offset);
4324 }
4325
4326 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4327 assert(_form_offset != 0, "");
4328 mh->obj_field_put(_form_offset, lform);
4329 }
4330
4331 /// MemberName accessors
4332
4333 oop java_lang_invoke_MemberName::clazz(oop mname) {
4334 assert(is_instance(mname), "wrong type");
4335 return mname->obj_field(_clazz_offset);
4336 }
4337
4338 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4339 assert(is_instance(mname), "wrong type");
4340 mname->obj_field_put(_clazz_offset, clazz);
4341 }
4342
4343 oop java_lang_invoke_MemberName::name(oop mname) {
4344 assert(is_instance(mname), "wrong type");
4345 return mname->obj_field(_name_offset);
4346 }
4347
4348 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4349 assert(is_instance(mname), "wrong type");
4350 mname->obj_field_put(_name_offset, name);
4351 }
4352
4353 oop java_lang_invoke_MemberName::type(oop mname) {
4354 assert(is_instance(mname), "wrong type");
4355 return mname->obj_field(_type_offset);
4356 }
4357
4358 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4359 assert(is_instance(mname), "wrong type");
4360 mname->obj_field_put(_type_offset, type);
4361 }
4362
4363 int java_lang_invoke_MemberName::flags(oop mname) {
4364 assert(is_instance(mname), "wrong type");
4365 return mname->int_field(_flags_offset);
4366 }
4367
4368 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4369 assert(is_instance(mname), "wrong type");
4370 mname->int_field_put(_flags_offset, flags);
4371 }
4372
4373
4374 // Return vmtarget from ResolvedMethodName method field through indirection
4375 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4376 assert(is_instance(mname), "wrong type");
4377 oop method = mname->obj_field(_method_offset);
4378 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4379 }
4380
4381 bool java_lang_invoke_MemberName::is_method(oop mname) {
4382 assert(is_instance(mname), "must be MemberName");
4383 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
4384 }
4385
4386 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4387 assert(is_instance(mname), "wrong type");
4388 mname->obj_field_put(_method_offset, resolved_method);
4389 }
4390
4391 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4392 assert(is_instance(mname), "wrong type");
4393 return (intptr_t) mname->address_field(_vmindex_offset);
4394 }
4395
4396 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4397 assert(is_instance(mname), "wrong type");
4398 mname->address_field_put(_vmindex_offset, (address) index);
4399 }
4400
4401
4402 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4403 assert(is_instance(resolved_method), "wrong type");
4404 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4405 assert(m->is_method(), "must be");
4406 return m;
4407 }
4408
4409 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4410 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4411 assert(is_instance(resolved_method), "wrong type");
4412 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4413 }
4414
4415 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4416 assert(is_instance(resolved_method), "wrong type");
4417 resolved_method->obj_field_put(_vmholder_offset, holder);
4418 }
4419
4420 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4421 const Method* method = m();
4422
4423 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4424 oop resolved_method = ResolvedMethodTable::find_method(method);
4425 if (resolved_method != nullptr) {
4426 return resolved_method;
4427 }
4428
4429 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4430 if (!k->is_initialized()) {
4431 k->initialize(CHECK_NULL);
4432 }
4433
4434 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4435
4436 NoSafepointVerifier nsv;
4437
4438 if (method->is_old()) {
4439 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4440 method->get_new_method();
4441 }
4442
4443 InstanceKlass* holder = method->method_holder();
4444
4445 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4446 // Add a reference to the loader (actually mirror because hidden classes may not have
4447 // distinct loaders) to ensure the metadata is kept alive.
4448 // This mirror may be different than the one in clazz field.
4449 set_vmholder(new_resolved_method, holder->java_mirror());
4450
4451 // Set flag in class to indicate this InstanceKlass has entries in the table
4452 // to avoid walking table during redefinition if none of the redefined classes
4453 // have any membernames in the table.
4454 holder->set_has_resolved_methods();
4455
4456 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4457 }
4458
4459 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4460 assert(is_instance(lform), "wrong type");
4461 return lform->obj_field(_vmentry_offset);
4462 }
4463
4464
4465 // Support for java_lang_invoke_MethodType
4466
4467 int java_lang_invoke_MethodType::_rtype_offset;
4468 int java_lang_invoke_MethodType::_ptypes_offset;
4469
4470 #define METHODTYPE_FIELDS_DO(macro) \
4471 macro(_rtype_offset, k, "rtype", class_signature, false); \
4472 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4473
4474 void java_lang_invoke_MethodType::compute_offsets() {
4475 InstanceKlass* k = vmClasses::MethodType_klass();
4476 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4477 }
4478
4479 #if INCLUDE_CDS
4480 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4481 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4482 }
4483 #endif
4484
4485 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4486 st->print("(");
4487 objArrayOop pts = ptypes(mt);
4488 if (pts != nullptr) {
4489 for (int i = 0, limit = pts->length(); i < limit; i++) {
4490 java_lang_Class::print_signature(pts->obj_at(i), st);
4491 }
4492 } else {
4493 st->print("null");
4494 }
4495 st->print(")");
4496 oop rt = rtype(mt);
4497 if (rt != nullptr) {
4498 java_lang_Class::print_signature(rt, st);
4499 } else {
4500 st->print("null");
4501 }
4502 }
4503
4504 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4505 ResourceMark rm;
4506 stringStream buffer(128);
4507 print_signature(mt, &buffer);
4508 const char* sigstr = buffer.base();
4509 int siglen = (int) buffer.size();
4510 Symbol *name;
4511 if (!intern_if_not_found) {
4512 name = SymbolTable::probe(sigstr, siglen);
4513 } else {
4514 name = SymbolTable::new_symbol(sigstr, siglen);
4515 }
4516 return name;
4517 }
4518
4519 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4520 if (mt1 == mt2)
4521 return true;
4522 if (rtype(mt1) != rtype(mt2))
4523 return false;
4524 if (ptype_count(mt1) != ptype_count(mt2))
4525 return false;
4526 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4527 if (ptype(mt1, i) != ptype(mt2, i))
4528 return false;
4529 }
4530 return true;
4531 }
4532
4533 oop java_lang_invoke_MethodType::rtype(oop mt) {
4534 assert(is_instance(mt), "must be a MethodType");
4535 return mt->obj_field(_rtype_offset);
4536 }
4537
4538 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4539 assert(is_instance(mt), "must be a MethodType");
4540 return (objArrayOop) mt->obj_field(_ptypes_offset);
4541 }
4542
4543 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4544 return ptypes(mt)->obj_at(idx);
4545 }
4546
4547 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4548 return ptypes(mt)->length();
4549 }
4550
4551 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4552 objArrayOop pts = ptypes(mt);
4553 int count = pts->length();
4554 int slots = 0;
4555 for (int i = 0; i < count; i++) {
4556 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4557 slots += type2size[bt];
4558 }
4559 return slots;
4560 }
4561
4562 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4563 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4564 return type2size[bt];
4565 }
4566
4567
4568 // Support for java_lang_invoke_CallSite
4569
4570 int java_lang_invoke_CallSite::_target_offset;
4571 int java_lang_invoke_CallSite::_context_offset;
4572
4573 #define CALLSITE_FIELDS_DO(macro) \
4574 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4575 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4576
4577 void java_lang_invoke_CallSite::compute_offsets() {
4578 InstanceKlass* k = vmClasses::CallSite_klass();
4579 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4580 }
4581
4582 #if INCLUDE_CDS
4583 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4584 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4585 }
4586 #endif
4587
4588 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4589 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4590
4591 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4592 return dep_oop;
4593 }
4594
4595 // Support for java_lang_invoke_ConstantCallSite
4596
4597 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4598
4599 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4600 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4601
4602 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4603 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4604 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4605 }
4606
4607 #if INCLUDE_CDS
4608 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4609 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4610 }
4611 #endif
4612
4613 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4614
4615 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4616 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4617
4618 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4619 InstanceKlass* k = vmClasses::Context_klass();
4620 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4621 }
4622
4623 #if INCLUDE_CDS
4624 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4625 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4626 }
4627 #endif
4628
4629 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4630 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4631 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4632 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4633 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4634 return dep_ctx;
4635 }
4636
4637 // Support for java_security_AccessControlContext
4638
4639 int java_security_AccessControlContext::_context_offset;
4640 int java_security_AccessControlContext::_privilegedContext_offset;
4641 int java_security_AccessControlContext::_isPrivileged_offset;
4642 int java_security_AccessControlContext::_isAuthorized_offset;
4643
4644 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4645 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4646 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4647 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4648 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4649
4650 void java_security_AccessControlContext::compute_offsets() {
4651 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4652 InstanceKlass* k = vmClasses::AccessControlContext_klass();
4653 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4654 }
4655
4656 #if INCLUDE_CDS
4657 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4658 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4659 }
4660 #endif
4661
4662 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4663 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4664 assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4665 // Ensure klass is initialized
4666 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4667 // Allocate result
4668 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4669 // Fill in values
4670 result->obj_field_put(_context_offset, context());
4671 result->obj_field_put(_privilegedContext_offset, privileged_context());
4672 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4673 result->bool_field_put(_isAuthorized_offset, true);
4674 return result;
4675 }
4676
4677
4678 // Support for java_lang_ClassLoader
4679
4680 int java_lang_ClassLoader::_loader_data_offset;
4681 int java_lang_ClassLoader::_parallelCapable_offset;
4682 int java_lang_ClassLoader::_name_offset;
4683 int java_lang_ClassLoader::_nameAndId_offset;
4684 int java_lang_ClassLoader::_unnamedModule_offset;
4685 int java_lang_ClassLoader::_parent_offset;
4686
4687 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4688 assert(loader != nullptr, "loader must not be null");
4689 assert(oopDesc::is_oop(loader), "loader must be oop");
4690 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4691 }
4692
4693 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4694 assert(loader != nullptr, "loader must not be null");
4695 assert(oopDesc::is_oop(loader), "loader must be oop");
4696 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4697 }
4698
4699 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4700 assert(loader != nullptr, "loader must not be null");
4701 assert(oopDesc::is_oop(loader), "loader must be oop");
4702 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4703 }
4704
4705 #define CLASSLOADER_FIELDS_DO(macro) \
4706 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4707 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4708 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4709 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4710 macro(_parent_offset, k1, "parent", classloader_signature, false)
4711
4712 void java_lang_ClassLoader::compute_offsets() {
4713 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4714 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4715
4716 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4717 }
4718
4719 #if INCLUDE_CDS
4720 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4721 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4722 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4723 }
4724 #endif
4725
4726 oop java_lang_ClassLoader::parent(oop loader) {
4727 assert(is_instance(loader), "loader must be oop");
4728 return loader->obj_field(_parent_offset);
4729 }
4730
4731 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4732 assert(is_instance(loader), "loader must be oop");
4733 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4734 }
4735
4736 // Returns the name field of this class loader. If the name field has not
4737 // been set, null will be returned.
4738 oop java_lang_ClassLoader::name(oop loader) {
4739 assert(is_instance(loader), "loader must be oop");
4740 return loader->obj_field(_name_offset);
4741 }
4742
4743 // Returns the nameAndId field of this class loader. The format is
4744 // as follows:
4745 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4746 // If the defining loader has no name then <qualified-class-name> @<id>
4747 // If built-in loader, then omit '@<id>' as there is only one instance.
4748 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4749 oop java_lang_ClassLoader::nameAndId(oop loader) {
4750 assert(is_instance(loader), "loader must be oop");
4751 return loader->obj_field(_nameAndId_offset);
4752 }
4753
4754 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4755 assert(is_instance(loader), "loader must be oop");
4756 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4757 oop acl = loader;
4758 debug_only(jint loop_count = 0);
4759 // This loop taken verbatim from ClassLoader.java:
4760 do {
4761 acl = parent(acl);
4762 if (cl == acl) {
4763 return true;
4764 }
4765 assert(++loop_count > 0, "loop_count overflow");
4766 } while (acl != nullptr);
4767 return false;
4768 }
4769
4770 bool java_lang_ClassLoader::is_instance(oop obj) {
4771 return obj != nullptr && is_subclass(obj->klass());
4772 }
4773
4774
4775 // For class loader classes, parallelCapable defined
4776 // based on non-null field
4777 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4778 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4779 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4780 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4781 }
4782
4783 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4784 oop cl = SystemDictionary::java_system_loader();
4785 while(cl != nullptr) {
4786 if (cl == loader) return true;
4787 cl = parent(cl);
4788 }
4789 return false;
4790 }
4791
4792 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4793 assert(is_instance(loader), "loader must be oop");
4794 return loader->obj_field(_unnamedModule_offset);
4795 }
4796
4797 // Support for java_lang_System
4798 //
4799
4800 int java_lang_System::_static_in_offset;
4801 int java_lang_System::_static_out_offset;
4802 int java_lang_System::_static_err_offset;
4803 int java_lang_System::_static_security_offset;
4804 int java_lang_System::_static_allow_security_offset;
4805 int java_lang_System::_static_never_offset;
4806
4807 #define SYSTEM_FIELDS_DO(macro) \
4808 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4809 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4810 macro(_static_err_offset, k, "err", print_stream_signature, true); \
4811 macro(_static_security_offset, k, "security", security_manager_signature, true); \
4812 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4813 macro(_static_never_offset, k, "NEVER", int_signature, true)
4814
4815 void java_lang_System::compute_offsets() {
4816 InstanceKlass* k = vmClasses::System_klass();
4817 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4818 }
4819
4820 // This field tells us that a security manager can never be installed so we
4821 // can completely skip populating the ProtectionDomainCacheTable.
4822 bool java_lang_System::allow_security_manager() {
4823 static int initialized = false;
4824 static bool allowed = true; // default
4825 if (!initialized) {
4826 oop base = vmClasses::System_klass()->static_field_base_raw();
4827 int never = base->int_field(_static_never_offset);
4828 allowed = (base->int_field(_static_allow_security_offset) != never);
4829 initialized = true;
4830 }
4831 return allowed;
4832 }
4833
4834 // This field tells us that a security manager is installed.
4835 bool java_lang_System::has_security_manager() {
4836 oop base = vmClasses::System_klass()->static_field_base_raw();
4837 return base->obj_field(_static_security_offset) != nullptr;
4838 }
4839
4840 #if INCLUDE_CDS
4841 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4842 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4843 }
4844 #endif
4845
4846 // Support for jdk_internal_misc_UnsafeConstants
4847 //
4848 class UnsafeConstantsFixup : public FieldClosure {
4849 private:
4850 int _address_size;
4851 int _page_size;
4852 bool _big_endian;
4853 bool _use_unaligned_access;
4854 int _data_cache_line_flush_size;
4855 public:
4856 UnsafeConstantsFixup() {
4857 // round up values for all static final fields
4858 _address_size = sizeof(void*);
4859 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4860 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4861 _use_unaligned_access = UseUnalignedAccesses;
4862 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4863 }
4864
4865 void do_field(fieldDescriptor* fd) {
4866 oop mirror = fd->field_holder()->java_mirror();
4867 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4868 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4869 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4870 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4871 if (fd->name() == vmSymbols::address_size_name()) {
4872 mirror->int_field_put(fd->offset(), _address_size);
4873 } else if (fd->name() == vmSymbols::page_size_name()) {
4874 mirror->int_field_put(fd->offset(), _page_size);
4875 } else if (fd->name() == vmSymbols::big_endian_name()) {
4876 mirror->bool_field_put(fd->offset(), _big_endian);
4877 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4878 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4879 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4880 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4881 } else {
4882 assert(false, "unexpected UnsafeConstants field");
4883 }
4884 }
4885 };
4886
4887 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4888 UnsafeConstantsFixup fixup;
4889 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4890 }
4891
4892
4893 // java_lang_StackTraceElement
4894
4895 int java_lang_StackTraceElement::_methodName_offset;
4896 int java_lang_StackTraceElement::_fileName_offset;
4897 int java_lang_StackTraceElement::_lineNumber_offset;
4898 int java_lang_StackTraceElement::_moduleName_offset;
4899 int java_lang_StackTraceElement::_moduleVersion_offset;
4900 int java_lang_StackTraceElement::_classLoaderName_offset;
4901 int java_lang_StackTraceElement::_declaringClass_offset;
4902 int java_lang_StackTraceElement::_declaringClassObject_offset;
4903
4904 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4905 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4906 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4907 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4908 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4909 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4910 macro(_methodName_offset, k, "methodName", string_signature, false); \
4911 macro(_fileName_offset, k, "fileName", string_signature, false); \
4912 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4913
4914 // Support for java_lang_StackTraceElement
4915 void java_lang_StackTraceElement::compute_offsets() {
4916 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4917 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4918 }
4919
4920 #if INCLUDE_CDS
4921 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4922 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4923 }
4924 #endif
4925
4926 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4927 element->obj_field_put(_fileName_offset, value);
4928 }
4929
4930 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4931 element->obj_field_put(_declaringClass_offset, value);
4932 }
4933
4934 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4935 element->obj_field_put(_methodName_offset, value);
4936 }
4937
4938 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4939 element->int_field_put(_lineNumber_offset, value);
4940 }
4941
4942 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4943 element->obj_field_put(_moduleName_offset, value);
4944 }
4945
4946 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4947 element->obj_field_put(_moduleVersion_offset, value);
4948 }
4949
4950 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4951 element->obj_field_put(_classLoaderName_offset, value);
4952 }
4953
4954 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4955 element->obj_field_put(_declaringClassObject_offset, value);
4956 }
4957
4958
4959 // java_lang_AssertionStatusDirectives
4960
4961 int java_lang_AssertionStatusDirectives::_classes_offset;
4962 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4963 int java_lang_AssertionStatusDirectives::_packages_offset;
4964 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4965 int java_lang_AssertionStatusDirectives::_deflt_offset;
4966
4967 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4968 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4969 macro(_classes_offset, k, "classes", string_array_signature, false); \
4970 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4971 macro(_packages_offset, k, "packages", string_array_signature, false); \
4972 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4973 macro(_deflt_offset, k, "deflt", bool_signature, false)
4974
4975 void java_lang_AssertionStatusDirectives::compute_offsets() {
4976 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4977 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4978 }
4979
4980 #if INCLUDE_CDS
4981 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4982 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4983 }
4984 #endif
4985
4986 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4987 o->obj_field_put(_classes_offset, val);
4988 }
4989
4990 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4991 o->obj_field_put(_classEnabled_offset, val);
4992 }
4993
4994 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4995 o->obj_field_put(_packages_offset, val);
4996 }
4997
4998 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4999 o->obj_field_put(_packageEnabled_offset, val);
5000 }
5001
5002 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5003 o->bool_field_put(_deflt_offset, val);
5004 }
5005
5006 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5007
5008 #define AOS_FIELDS_DO(macro) \
5009 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5010
5011 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5012 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5013 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5014 }
5015
5016 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5017 assert(_owner_offset != 0, "Must be initialized");
5018 return obj->obj_field(_owner_offset);
5019 }
5020
5021 #if INCLUDE_CDS
5022 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5023 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5024 }
5025 #endif
5026
5027 int vector_VectorPayload::_payload_offset;
5028
5029 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5030 macro(_payload_offset, k, "payload", object_signature, false)
5031
5032 void vector_VectorPayload::compute_offsets() {
5033 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5034 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5035 }
5036
5037 #if INCLUDE_CDS
5038 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5039 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5040 }
5041 #endif
5042
5043 void vector_VectorPayload::set_payload(oop o, oop val) {
5044 o->obj_field_put(_payload_offset, val);
5045 }
5046
5047 bool vector_VectorPayload::is_instance(oop obj) {
5048 return obj != nullptr && is_subclass(obj->klass());
5049 }
5050
5051 int java_lang_Integer_IntegerCache::_static_cache_offset;
5052 int java_lang_Long_LongCache::_static_cache_offset;
5053 int java_lang_Character_CharacterCache::_static_cache_offset;
5054 int java_lang_Short_ShortCache::_static_cache_offset;
5055 int java_lang_Byte_ByteCache::_static_cache_offset;
5056
5057 #define INTEGER_CACHE_FIELDS_DO(macro) \
5058 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5059
5060 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5061 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5062 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5063 }
5064
5065 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5066 oop base = ik->static_field_base_raw();
5067 return objArrayOop(base->obj_field(_static_cache_offset));
5068 }
5069
5070 Symbol* java_lang_Integer_IntegerCache::symbol() {
5071 return vmSymbols::java_lang_Integer_IntegerCache();
5072 }
5073
5074 #if INCLUDE_CDS
5075 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5076 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5077 }
5078 #endif
5079 #undef INTEGER_CACHE_FIELDS_DO
5080
5081 jint java_lang_Integer::value(oop obj) {
5082 jvalue v;
5083 java_lang_boxing_object::get_value(obj, &v);
5084 return v.i;
5085 }
5086
5087 #define LONG_CACHE_FIELDS_DO(macro) \
5088 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5089
5090 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5091 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5092 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5093 }
5094
5095 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5096 oop base = ik->static_field_base_raw();
5097 return objArrayOop(base->obj_field(_static_cache_offset));
5098 }
5099
5100 Symbol* java_lang_Long_LongCache::symbol() {
5101 return vmSymbols::java_lang_Long_LongCache();
5102 }
5103
5104 #if INCLUDE_CDS
5105 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5106 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5107 }
5108 #endif
5109 #undef LONG_CACHE_FIELDS_DO
5110
5111 jlong java_lang_Long::value(oop obj) {
5112 jvalue v;
5113 java_lang_boxing_object::get_value(obj, &v);
5114 return v.j;
5115 }
5116
5117 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5118 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5119
5120 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5121 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5122 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5123 }
5124
5125 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5126 oop base = ik->static_field_base_raw();
5127 return objArrayOop(base->obj_field(_static_cache_offset));
5128 }
5129
5130 Symbol* java_lang_Character_CharacterCache::symbol() {
5131 return vmSymbols::java_lang_Character_CharacterCache();
5132 }
5133
5134 #if INCLUDE_CDS
5135 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5136 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5137 }
5138 #endif
5139 #undef CHARACTER_CACHE_FIELDS_DO
5140
5141 jchar java_lang_Character::value(oop obj) {
5142 jvalue v;
5143 java_lang_boxing_object::get_value(obj, &v);
5144 return v.c;
5145 }
5146
5147 #define SHORT_CACHE_FIELDS_DO(macro) \
5148 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5149
5150 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5151 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5152 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5153 }
5154
5155 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5156 oop base = ik->static_field_base_raw();
5157 return objArrayOop(base->obj_field(_static_cache_offset));
5158 }
5159
5160 Symbol* java_lang_Short_ShortCache::symbol() {
5161 return vmSymbols::java_lang_Short_ShortCache();
5162 }
5163
5164 #if INCLUDE_CDS
5165 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5166 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5167 }
5168 #endif
5169 #undef SHORT_CACHE_FIELDS_DO
5170
5171 jshort java_lang_Short::value(oop obj) {
5172 jvalue v;
5173 java_lang_boxing_object::get_value(obj, &v);
5174 return v.s;
5175 }
5176
5177 #define BYTE_CACHE_FIELDS_DO(macro) \
5178 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5179
5180 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5181 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5182 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5183 }
5184
5185 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5186 oop base = ik->static_field_base_raw();
5187 return objArrayOop(base->obj_field(_static_cache_offset));
5188 }
5189
5190 Symbol* java_lang_Byte_ByteCache::symbol() {
5191 return vmSymbols::java_lang_Byte_ByteCache();
5192 }
5193
5194 #if INCLUDE_CDS
5195 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5196 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5197 }
5198 #endif
5199 #undef BYTE_CACHE_FIELDS_DO
5200
5201 jbyte java_lang_Byte::value(oop obj) {
5202 jvalue v;
5203 java_lang_boxing_object::get_value(obj, &v);
5204 return v.b;
5205 }
5206
5207 int java_lang_Boolean::_static_TRUE_offset;
5208 int java_lang_Boolean::_static_FALSE_offset;
5209
5210 #define BOOLEAN_FIELDS_DO(macro) \
5211 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5212 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5213
5214
5215 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5216 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5217 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5218 }
5219
5220 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5221 oop base = ik->static_field_base_raw();
5222 return base->obj_field(_static_TRUE_offset);
5223 }
5224
5225 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5226 oop base = ik->static_field_base_raw();
5227 return base->obj_field(_static_FALSE_offset);
5228 }
5229
5230 Symbol* java_lang_Boolean::symbol() {
5231 return vmSymbols::java_lang_Boolean();
5232 }
5233
5234 #if INCLUDE_CDS
5235 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5236 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5237 }
5238 #endif
5239 #undef BOOLEAN_CACHE_FIELDS_DO
5240
5241 jboolean java_lang_Boolean::value(oop obj) {
5242 jvalue v;
5243 java_lang_boxing_object::get_value(obj, &v);
5244 return v.z;
5245 }
5246
5247 // java_lang_reflect_RecordComponent
5248
5249 int java_lang_reflect_RecordComponent::_clazz_offset;
5250 int java_lang_reflect_RecordComponent::_name_offset;
5251 int java_lang_reflect_RecordComponent::_type_offset;
5252 int java_lang_reflect_RecordComponent::_accessor_offset;
5253 int java_lang_reflect_RecordComponent::_signature_offset;
5254 int java_lang_reflect_RecordComponent::_annotations_offset;
5255 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5256
5257 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5258 macro(_clazz_offset, k, "clazz", class_signature, false); \
5259 macro(_name_offset, k, "name", string_signature, false); \
5260 macro(_type_offset, k, "type", class_signature, false); \
5261 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5262 macro(_signature_offset, k, "signature", string_signature, false); \
5263 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5264 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5265
5266 // Support for java_lang_reflect_RecordComponent
5267 void java_lang_reflect_RecordComponent::compute_offsets() {
5268 InstanceKlass* k = vmClasses::RecordComponent_klass();
5269 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5270 }
5271
5272 #if INCLUDE_CDS
5273 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5274 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5275 }
5276 #endif
5277
5278 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5279 element->obj_field_put(_clazz_offset, value);
5280 }
5281
5282 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5283 element->obj_field_put(_name_offset, value);
5284 }
5285
5286 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5287 element->obj_field_put(_type_offset, value);
5288 }
5289
5290 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5291 element->obj_field_put(_accessor_offset, value);
5292 }
5293
5294 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5295 element->obj_field_put(_signature_offset, value);
5296 }
5297
5298 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5299 element->obj_field_put(_annotations_offset, value);
5300 }
5301
5302 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5303 element->obj_field_put(_typeAnnotations_offset, value);
5304 }
5305
5306 // java_lang_InternalError
5307 int java_lang_InternalError::_during_unsafe_access_offset;
5308
5309 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5310 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5311 }
5312
5313 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5314 return internal_error->bool_field(_during_unsafe_access_offset);
5315 }
5316
5317 void java_lang_InternalError::compute_offsets() {
5318 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5319 }
5320
5321 #if INCLUDE_CDS
5322 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5323 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5324 }
5325 #endif
5326
5327 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5328 f(java_lang_Class) \
5329 f(java_lang_String) \
5330 f(java_lang_ref_Reference) \
5331 //end
5332
5333 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5334 f(java_lang_System) \
5335 f(java_lang_ClassLoader) \
5336 f(java_lang_Throwable) \
5337 f(java_lang_Thread) \
5338 f(java_lang_Thread_FieldHolder) \
5339 f(java_lang_Thread_Constants) \
5340 f(java_lang_ThreadGroup) \
5341 f(java_lang_VirtualThread) \
5342 f(java_lang_InternalError) \
5343 f(java_lang_AssertionStatusDirectives) \
5344 f(java_lang_ref_SoftReference) \
5345 f(java_lang_invoke_MethodHandle) \
5346 f(java_lang_invoke_DirectMethodHandle) \
5347 f(java_lang_invoke_MemberName) \
5348 f(java_lang_invoke_ResolvedMethodName) \
5349 f(java_lang_invoke_LambdaForm) \
5350 f(java_lang_invoke_MethodType) \
5351 f(java_lang_invoke_CallSite) \
5352 f(java_lang_invoke_ConstantCallSite) \
5353 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5354 f(java_security_AccessControlContext) \
5355 f(java_lang_reflect_AccessibleObject) \
5356 f(java_lang_reflect_Method) \
5357 f(java_lang_reflect_Constructor) \
5358 f(java_lang_reflect_Field) \
5359 f(java_lang_reflect_RecordComponent) \
5360 f(reflect_ConstantPool) \
5361 f(java_lang_reflect_Parameter) \
5362 f(java_lang_Module) \
5363 f(java_lang_StackTraceElement) \
5364 f(java_lang_ClassFrameInfo) \
5365 f(java_lang_StackFrameInfo) \
5366 f(java_lang_LiveStackFrameInfo) \
5367 f(jdk_internal_vm_ContinuationScope) \
5368 f(jdk_internal_vm_Continuation) \
5369 f(jdk_internal_vm_StackChunk) \
5370 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5371 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5372 f(jdk_internal_foreign_abi_ABIDescriptor) \
5373 f(jdk_internal_foreign_abi_VMStorage) \
5374 f(jdk_internal_foreign_abi_CallConv) \
5375 f(jdk_internal_misc_UnsafeConstants) \
5376 f(java_lang_boxing_object) \
5377 f(vector_VectorPayload) \
5378 //end
5379
5380 #define BASIC_JAVA_CLASSES_DO(f) \
5381 BASIC_JAVA_CLASSES_DO_PART1(f) \
5382 BASIC_JAVA_CLASSES_DO_PART2(f)
5383
5384 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5385
5386 // Compute field offsets of all the classes in this file
5387 void JavaClasses::compute_offsets() {
5388 if (CDSConfig::is_using_archive()) {
5389 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5390 JvmtiExport::has_early_class_hook_env()),
5391 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5392 // None of the classes used by the rest of this function can be replaced by
5393 // JVMTI ClassFileLoadHook.
5394 // We are safe to use the archived offsets, which have already been restored
5395 // by JavaClasses::serialize_offsets, without computing the offsets again.
5396 return;
5397 }
5398
5399 // We have already called the compute_offsets() of the
5400 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5401 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5402 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5403 }
5404
5405 #if INCLUDE_CDS
5406 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5407
5408 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5409 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5410 }
5411 #endif
5412
5413 #if INCLUDE_CDS_JAVA_HEAP
5414 bool JavaClasses::is_supported_for_archiving(oop obj) {
5415 Klass* klass = obj->klass();
5416
5417 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed.
5418 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5419 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5420 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5421 // So for now we cannot not support these classes for archiving.
5422 //
5423 // These objects typically are not referenced by static fields, but rather by resolved
5424 // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5425 klass == vmClasses::ResolvedMethodName_klass() ||
5426 klass == vmClasses::MemberName_klass() ||
5427 klass == vmClasses::Context_klass() ||
5428 // It's problematic to archive Reference objects. One of the reasons is that
5429 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5430 klass->is_subclass_of(vmClasses::Reference_klass())) {
5431 return false;
5432 }
5433
5434 return true;
5435 }
5436 #endif
5437
5438 #ifndef PRODUCT
5439
5440 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5441
5442 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5443 const char* field_sig) {
5444 EXCEPTION_MARK;
5445 fieldDescriptor fd;
5446 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5447 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5448 InstanceKlass* ik = InstanceKlass::cast(k);
5449 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5450 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5451 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5452 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5453 return false;
5454 }
5455 if (fd.is_static()) {
5456 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5457 return false;
5458 }
5459 if (fd.offset() == deserialized_offset ) {
5460 return true;
5461 } else {
5462 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5463 klass_name, field_name, deserialized_offset, fd.offset());
5464 return false;
5465 }
5466 }
5467
5468 void JavaClasses::check_offsets() {
5469 bool valid = true;
5470
5471 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5472 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5473
5474 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5475 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5476
5477 // Boxed primitive objects (java_lang_boxing_object)
5478
5479 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5480 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5481 if (Arguments::enable_preview() && NullableFieldFlattening && (InlineFieldMaxFlatSize >= 64 || InlineFieldMaxFlatSize < 0)) {
5482 CHECK_LONG_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5483 } else {
5484 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5485 }
5486 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5487 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5488 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5489 if (Arguments::enable_preview() && NullableFieldFlattening && (InlineFieldMaxFlatSize >= 64 || InlineFieldMaxFlatSize < 0)) {
5490 CHECK_LONG_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5491 } else {
5492 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5493 }
5494 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5495
5496 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5497 }
5498
5499 #endif // PRODUCT
5500
5501 int InjectedField::compute_offset() {
5502 InstanceKlass* ik = InstanceKlass::cast(klass());
5503 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5504 if (!may_be_java && !fs.field_flags().is_injected()) {
5505 // Only look at injected fields
5506 continue;
5507 }
5508 if (fs.name() == name() && fs.signature() == signature()) {
5509 return fs.offset();
5510 }
5511 }
5512 ResourceMark rm;
5513 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)" : "");
5514 #ifndef PRODUCT
5515 ik->print();
5516 tty->print_cr("all fields:");
5517 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5518 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5519 }
5520 #endif //PRODUCT
5521 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5522 return -1;
5523 }
5524
5525 void javaClasses_init() {
5526 JavaClasses::compute_offsets();
5527 JavaClasses::check_offsets();
5528 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5529 }