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