1 /*
2 * Copyright (c) 1997, 2019, 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 "classfile/altHashing.hpp"
27 #include "classfile/classLoaderData.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "code/debugInfo.hpp"
34 #include "code/dependencyContext.hpp"
35 #include "code/pcDesc.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/heapShared.inline.hpp"
41 #include "memory/metaspaceShared.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/fieldStreams.inline.hpp"
46 #include "oops/instanceKlass.hpp"
47 #include "oops/instanceMirrorKlass.hpp"
48 #include "oops/klass.hpp"
49 #include "oops/method.inline.hpp"
50 #include "oops/objArrayOop.inline.hpp"
51 #include "oops/oop.inline.hpp"
52 #include "oops/symbol.hpp"
53 #include "oops/recordComponent.hpp"
54 #include "oops/typeArrayOop.inline.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/resolvedMethodTable.hpp"
57 #include "runtime/fieldDescriptor.inline.hpp"
58 #include "runtime/frame.inline.hpp"
59 #include "runtime/handles.inline.hpp"
60 #include "runtime/init.hpp"
61 #include "runtime/interfaceSupport.inline.hpp"
62 #include "runtime/java.hpp"
63 #include "runtime/javaCalls.hpp"
64 #include "runtime/jniHandles.inline.hpp"
65 #include "runtime/safepoint.hpp"
66 #include "runtime/safepointVerifiers.hpp"
67 #include "runtime/thread.inline.hpp"
68 #include "runtime/vframe.inline.hpp"
69 #include "runtime/vm_version.hpp"
70 #include "utilities/align.hpp"
71 #include "utilities/preserveException.hpp"
72 #include "utilities/utf8.hpp"
73 #if INCLUDE_JVMCI
74 #include "jvmci/jvmciJavaClasses.hpp"
75 #endif
76
77 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
78 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
79
80 #if INCLUDE_CDS
81 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
82 f->do_u4((u4*)&_##name##_offset);
83 #endif
84
85 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
86 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
87
88 InjectedField JavaClasses::_injected_fields[] = {
89 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
90 };
91
92 // Register native methods of Object
93 void java_lang_Object::register_natives(TRAPS) {
94 InstanceKlass* obj = SystemDictionary::Object_klass();
95 Method::register_native(obj, vmSymbols::hashCode_name(),
96 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
97 Method::register_native(obj, vmSymbols::wait_name(),
98 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
99 Method::register_native(obj, vmSymbols::notify_name(),
100 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
101 Method::register_native(obj, vmSymbols::notifyAll_name(),
102 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
103 Method::register_native(obj, vmSymbols::clone_name(),
104 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
105 }
106
107 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
108 return _injected_fields[id].compute_offset();
109 }
110
111 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
112 *field_count = 0;
113
114 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
115 if (sid == vmSymbols::NO_SID) {
116 // Only well known classes can inject fields
117 return NULL;
118 }
119
120 int count = 0;
121 int start = -1;
122
123 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
124 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
125 count++; \
126 if (start == -1) start = klass##_##name##_enum; \
127 }
128 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
129 #undef LOOKUP_INJECTED_FIELD
130
131 if (start != -1) {
132 *field_count = count;
133 return _injected_fields + start;
134 }
135 return NULL;
136 }
137
138
139 // Helpful routine for computing field offsets at run time rather than hardcoding them
140 // Finds local fields only, including static fields. Static field offsets are from the
141 // beginning of the mirror.
142 static void compute_offset(int &dest_offset,
143 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
144 bool is_static = false) {
145 fieldDescriptor fd;
146 if (ik == NULL) {
147 ResourceMark rm;
148 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
149 vm_exit_during_initialization("Invalid layout of well-known class");
150 }
151
152 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
153 ResourceMark rm;
154 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
155 name_symbol->as_C_string(), signature_symbol->as_C_string());
156 #ifndef PRODUCT
157 // Prints all fields and offsets
158 Log(class) lt;
159 LogStream ls(lt.error());
160 ik->print_on(&ls);
161 #endif //PRODUCT
162 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
163 }
164 dest_offset = fd.offset();
165 }
166
167 // Overloading to pass name as a string.
168 static void compute_offset(int& dest_offset, InstanceKlass* ik,
169 const char* name_string, Symbol* signature_symbol,
170 bool is_static = false) {
171 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
172 if (name == NULL) {
173 ResourceMark rm;
174 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
175 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
176 }
177 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
178 }
179
180 int java_lang_String::value_offset = 0;
181 int java_lang_String::hash_offset = 0;
182 int java_lang_String::hashIsZero_offset = 0;
183 int java_lang_String::coder_offset = 0;
184
185 bool java_lang_String::initialized = false;
186
187 bool java_lang_String::is_instance(oop obj) {
188 return is_instance_inlined(obj);
189 }
190
191 #if INCLUDE_CDS
192 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
193 f->do_u4((u4*)&offset)
194 #endif
195
196 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
197 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
198
199 #define STRING_FIELDS_DO(macro) \
200 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
201 macro(hash_offset, k, "hash", int_signature, false); \
202 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
203 macro(coder_offset, k, "coder", byte_signature, false);
204
205 void java_lang_String::compute_offsets() {
206 if (initialized) {
207 return;
208 }
209
210 InstanceKlass* k = SystemDictionary::String_klass();
211 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
212
213 initialized = true;
214 }
215
216 #if INCLUDE_CDS
217 void java_lang_String::serialize_offsets(SerializeClosure* f) {
218 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
219 f->do_bool(&initialized);
220 }
221 #endif
222
223 class CompactStringsFixup : public FieldClosure {
224 private:
225 bool _value;
226
227 public:
228 CompactStringsFixup(bool value) : _value(value) {}
229
230 void do_field(fieldDescriptor* fd) {
231 if (fd->name() == vmSymbols::compact_strings_name()) {
232 oop mirror = fd->field_holder()->java_mirror();
233 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
234 assert(mirror != NULL, "String must have mirror already");
235 mirror->bool_field_put(fd->offset(), _value);
236 }
237 }
238 };
239
240 void java_lang_String::set_compact_strings(bool value) {
241 CompactStringsFixup fix(value);
242 SystemDictionary::String_klass()->do_local_static_fields(&fix);
243 }
244
245 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
246 assert(initialized, "Must be initialized");
247 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
248
249 // Create the String object first, so there's a chance that the String
250 // and the char array it points to end up in the same cache line.
251 oop obj;
252 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
253
254 // Create the char array. The String object must be handlized here
255 // because GC can happen as a result of the allocation attempt.
256 Handle h_obj(THREAD, obj);
257 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
258 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
259
260 // Point the String at the char array
261 obj = h_obj();
262 set_value(obj, buffer);
263 // No need to zero the offset, allocation zero'ed the entire String object
264 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
265 return h_obj;
266 }
267
268 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
269 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
270 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
271 typeArrayOop buffer = value(h_obj());
272 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
273 if (is_latin1) {
274 for (int index = 0; index < length; index++) {
275 buffer->byte_at_put(index, (jbyte)unicode[index]);
276 }
277 } else {
278 for (int index = 0; index < length; index++) {
279 buffer->char_at_put(index, unicode[index]);
280 }
281 }
282
283 #ifdef ASSERT
284 {
285 ResourceMark rm;
286 char* expected = UNICODE::as_utf8(unicode, length);
287 char* actual = as_utf8_string(h_obj());
288 if (strcmp(expected, actual) != 0) {
289 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
290 ShouldNotReachHere();
291 }
292 }
293 #endif
294
295 return h_obj;
296 }
297
298 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
299 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
300 return h_obj();
301 }
302
303 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
304 if (utf8_str == NULL) {
305 return Handle();
306 }
307 bool has_multibyte, is_latin1;
308 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
309 if (!CompactStrings) {
310 has_multibyte = true;
311 is_latin1 = false;
312 }
313
314 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
315 if (length > 0) {
316 if (!has_multibyte) {
317 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
318 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
319 } else if (is_latin1) {
320 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
321 } else {
322 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
323 }
324 }
325
326 #ifdef ASSERT
327 // This check is too strict because the input string is not necessarily valid UTF8.
328 // For example, it may be created with arbitrary content via jni_NewStringUTF.
329 /*
330 {
331 ResourceMark rm;
332 const char* expected = utf8_str;
333 char* actual = as_utf8_string(h_obj());
334 if (strcmp(expected, actual) != 0) {
335 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
336 ShouldNotReachHere();
337 }
338 }
339 */
340 #endif
341
342 return h_obj;
343 }
344
345 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
346 Handle h_obj = create_from_str(utf8_str, CHECK_0);
347 return h_obj();
348 }
349
350 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
351 const char* utf8_str = (char*)symbol->bytes();
352 int utf8_len = symbol->utf8_length();
353
354 bool has_multibyte, is_latin1;
355 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
356 if (!CompactStrings) {
357 has_multibyte = true;
358 is_latin1 = false;
359 }
360
361 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
362 if (length > 0) {
363 if (!has_multibyte) {
364 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
365 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
366 } else if (is_latin1) {
367 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
368 } else {
369 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
370 }
371 }
372
373 #ifdef ASSERT
374 {
375 ResourceMark rm;
376 const char* expected = symbol->as_utf8();
377 char* actual = as_utf8_string(h_obj());
378 if (strncmp(expected, actual, utf8_len) != 0) {
379 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
380 ShouldNotReachHere();
381 }
382 }
383 #endif
384
385 return h_obj;
386 }
387
388 // Converts a C string to a Java String based on current encoding
389 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
390 assert(str != NULL, "bad arguments");
391
392 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
393 static to_java_string_fn_t _to_java_string_fn = NULL;
394
395 if (_to_java_string_fn == NULL) {
396 void *lib_handle = os::native_java_library();
397 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
398 #if defined(_WIN32) && !defined(_WIN64)
399 if (_to_java_string_fn == NULL) {
400 // On 32 bit Windows, also try __stdcall decorated name
401 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
402 }
403 #endif
404 if (_to_java_string_fn == NULL) {
405 fatal("JNU_NewStringPlatform missing");
406 }
407 }
408
409 jstring js = NULL;
410 {
411 assert(THREAD->is_Java_thread(), "must be java thread");
412 JavaThread* thread = (JavaThread*)THREAD;
413 HandleMark hm(thread);
414 ThreadToNativeFromVM ttn(thread);
415 js = (_to_java_string_fn)(thread->jni_environment(), str);
416 }
417
418 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
419 JNIHandles::destroy_local(js); // destroy local JNIHandle.
420 return native_platform_string;
421 }
422
423 // Converts a Java String to a native C string that can be used for
424 // native OS calls.
425 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
426 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
427 static to_platform_string_fn_t _to_platform_string_fn = NULL;
428
429 if (_to_platform_string_fn == NULL) {
430 void *lib_handle = os::native_java_library();
431 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
432 if (_to_platform_string_fn == NULL) {
433 fatal("GetStringPlatformChars missing");
434 }
435 }
436
437 char *native_platform_string;
438 { JavaThread* thread = (JavaThread*)THREAD;
439 assert(thread->is_Java_thread(), "must be java thread");
440 JNIEnv *env = thread->jni_environment();
441 jstring js = (jstring) JNIHandles::make_local(env, java_string());
442 bool is_copy;
443 HandleMark hm(thread);
444 ThreadToNativeFromVM ttn(thread);
445 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
446 assert(is_copy == JNI_TRUE, "is_copy value changed");
447 JNIHandles::destroy_local(js);
448 }
449 return native_platform_string;
450 }
451
452 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
453 oop obj = java_string();
454 // Typical usage is to convert all '/' to '.' in string.
455 typeArrayOop value = java_lang_String::value(obj);
456 int length = java_lang_String::length(obj, value);
457 bool is_latin1 = java_lang_String::is_latin1(obj);
458
459 // First check if any from_char exist
460 int index; // Declared outside, used later
461 for (index = 0; index < length; index++) {
462 jchar c = !is_latin1 ? value->char_at(index) :
463 ((jchar) value->byte_at(index)) & 0xff;
464 if (c == from_char) {
465 break;
466 }
467 }
468 if (index == length) {
469 // No from_char, so do not copy.
470 return java_string;
471 }
472
473 // Check if result string will be latin1
474 bool to_is_latin1 = false;
475
476 // Replacement char must be latin1
477 if (CompactStrings && UNICODE::is_latin1(to_char)) {
478 if (is_latin1) {
479 // Source string is latin1 as well
480 to_is_latin1 = true;
481 } else if (!UNICODE::is_latin1(from_char)) {
482 // We are replacing an UTF16 char. Scan string to
483 // check if result can be latin1 encoded.
484 to_is_latin1 = true;
485 for (index = 0; index < length; index++) {
486 jchar c = value->char_at(index);
487 if (c != from_char && !UNICODE::is_latin1(c)) {
488 to_is_latin1 = false;
489 break;
490 }
491 }
492 }
493 }
494
495 // Create new UNICODE (or byte) buffer. Must handlize value because GC
496 // may happen during String and char array creation.
497 typeArrayHandle h_value(THREAD, value);
498 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
499 typeArrayOop from_buffer = h_value();
500 typeArrayOop to_buffer = java_lang_String::value(string());
501
502 // Copy contents
503 for (index = 0; index < length; index++) {
504 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
505 ((jchar) from_buffer->byte_at(index)) & 0xff;
506 if (c == from_char) {
507 c = to_char;
508 }
509 if (!to_is_latin1) {
510 to_buffer->char_at_put(index, c);
511 } else {
512 to_buffer->byte_at_put(index, (jbyte) c);
513 }
514 }
515 return string;
516 }
517
518 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
519 typeArrayOop value = java_lang_String::value(java_string);
520 length = java_lang_String::length(java_string, value);
521 bool is_latin1 = java_lang_String::is_latin1(java_string);
522
523 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
524 if (result != NULL) {
525 if (!is_latin1) {
526 for (int index = 0; index < length; index++) {
527 result[index] = value->char_at(index);
528 }
529 } else {
530 for (int index = 0; index < length; index++) {
531 result[index] = ((jchar) value->byte_at(index)) & 0xff;
532 }
533 }
534 } else {
535 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
536 }
537 return result;
538 }
539
540 unsigned int java_lang_String::hash_code(oop java_string) {
541 // The hash and hashIsZero fields are subject to a benign data race,
542 // making it crucial to ensure that any observable result of the
543 // calculation in this method stays correct under any possible read of
544 // these fields. Necessary restrictions to allow this to be correct
545 // without explicit memory fences or similar concurrency primitives is
546 // that we can ever only write to one of these two fields for a given
547 // String instance, and that the computation is idempotent and derived
548 // from immutable state
549 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized");
550 if (java_lang_String::hash_is_set(java_string)) {
551 return java_string->int_field(hash_offset);
552 }
553
554 typeArrayOop value = java_lang_String::value(java_string);
555 int length = java_lang_String::length(java_string, value);
556 bool is_latin1 = java_lang_String::is_latin1(java_string);
557
558 unsigned int hash = 0;
559 if (length > 0) {
560 if (is_latin1) {
561 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
562 } else {
563 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
564 }
565 }
566
567 if (hash != 0) {
568 java_string->int_field_put(hash_offset, hash);
569 } else {
570 java_string->bool_field_put(hashIsZero_offset, true);
571 }
572 return hash;
573 }
574
575 char* java_lang_String::as_quoted_ascii(oop java_string) {
576 typeArrayOop value = java_lang_String::value(java_string);
577 int length = java_lang_String::length(java_string, value);
578 bool is_latin1 = java_lang_String::is_latin1(java_string);
579
580 if (length == 0) return NULL;
581
582 char* result;
583 int result_length;
584 if (!is_latin1) {
585 jchar* base = value->char_at_addr(0);
586 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
587 result = NEW_RESOURCE_ARRAY(char, result_length);
588 UNICODE::as_quoted_ascii(base, length, result, result_length);
589 } else {
590 jbyte* base = value->byte_at_addr(0);
591 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
592 result = NEW_RESOURCE_ARRAY(char, result_length);
593 UNICODE::as_quoted_ascii(base, length, result, result_length);
594 }
595 assert(result_length >= length + 1, "must not be shorter");
596 assert(result_length == (int)strlen(result) + 1, "must match");
597 return result;
598 }
599
600 Symbol* java_lang_String::as_symbol(oop java_string) {
601 typeArrayOop value = java_lang_String::value(java_string);
602 int length = java_lang_String::length(java_string, value);
603 bool is_latin1 = java_lang_String::is_latin1(java_string);
604 if (!is_latin1) {
605 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
606 Symbol* sym = SymbolTable::new_symbol(base, length);
607 return sym;
608 } else {
609 ResourceMark rm;
610 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
611 const char* base = UNICODE::as_utf8(position, length);
612 Symbol* sym = SymbolTable::new_symbol(base, length);
613 return sym;
614 }
615 }
616
617 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
618 typeArrayOop value = java_lang_String::value(java_string);
619 int length = java_lang_String::length(java_string, value);
620 bool is_latin1 = java_lang_String::is_latin1(java_string);
621 if (!is_latin1) {
622 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
623 return SymbolTable::probe_unicode(base, length);
624 } else {
625 ResourceMark rm;
626 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
627 const char* base = UNICODE::as_utf8(position, length);
628 return SymbolTable::probe(base, length);
629 }
630 }
631
632 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
633 assert(value_equals(value, java_lang_String::value(java_string)),
634 "value must be same as java_lang_String::value(java_string)");
635 int length = java_lang_String::length(java_string, value);
636 if (length == 0) {
637 return 0;
638 }
639 if (!java_lang_String::is_latin1(java_string)) {
640 return UNICODE::utf8_length(value->char_at_addr(0), length);
641 } else {
642 return UNICODE::utf8_length(value->byte_at_addr(0), length);
643 }
644 }
645
646 int java_lang_String::utf8_length(oop java_string) {
647 typeArrayOop value = java_lang_String::value(java_string);
648 return utf8_length(java_string, value);
649 }
650
651 char* java_lang_String::as_utf8_string(oop java_string) {
652 typeArrayOop value = java_lang_String::value(java_string);
653 int length = java_lang_String::length(java_string, value);
654 bool is_latin1 = java_lang_String::is_latin1(java_string);
655 if (!is_latin1) {
656 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
657 return UNICODE::as_utf8(position, length);
658 } else {
659 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
660 return UNICODE::as_utf8(position, length);
661 }
662 }
663
664 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
665 assert(value_equals(value, java_lang_String::value(java_string)),
666 "value must be same as java_lang_String::value(java_string)");
667 int length = java_lang_String::length(java_string, value);
668 bool is_latin1 = java_lang_String::is_latin1(java_string);
669 if (!is_latin1) {
670 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
671 return UNICODE::as_utf8(position, length, buf, buflen);
672 } else {
673 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
674 return UNICODE::as_utf8(position, length, buf, buflen);
675 }
676 }
677
678 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
679 typeArrayOop value = java_lang_String::value(java_string);
680 return as_utf8_string(java_string, value, buf, buflen);
681 }
682
683 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
684 typeArrayOop value = java_lang_String::value(java_string);
685 bool is_latin1 = java_lang_String::is_latin1(java_string);
686 assert(start + len <= java_lang_String::length(java_string), "just checking");
687 if (!is_latin1) {
688 jchar* position = value->char_at_addr(start);
689 return UNICODE::as_utf8(position, len);
690 } else {
691 jbyte* position = value->byte_at_addr(start);
692 return UNICODE::as_utf8(position, len);
693 }
694 }
695
696 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
697 assert(value_equals(value, java_lang_String::value(java_string)),
698 "value must be same as java_lang_String::value(java_string)");
699 assert(start + len <= java_lang_String::length(java_string), "just checking");
700 bool is_latin1 = java_lang_String::is_latin1(java_string);
701 if (!is_latin1) {
702 jchar* position = value->char_at_addr(start);
703 return UNICODE::as_utf8(position, len, buf, buflen);
704 } else {
705 jbyte* position = value->byte_at_addr(start);
706 return UNICODE::as_utf8(position, len, buf, buflen);
707 }
708 }
709
710 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
711 assert(java_string->klass() == SystemDictionary::String_klass(),
712 "must be java_string");
713 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
714 int length = java_lang_String::length(java_string, value);
715 if (length != len) {
716 return false;
717 }
718 bool is_latin1 = java_lang_String::is_latin1(java_string);
719 if (!is_latin1) {
720 for (int i = 0; i < len; i++) {
721 if (value->char_at(i) != chars[i]) {
722 return false;
723 }
724 }
725 } else {
726 for (int i = 0; i < len; i++) {
727 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
728 return false;
729 }
730 }
731 }
732 return true;
733 }
734
735 bool java_lang_String::equals(oop str1, oop str2) {
736 assert(str1->klass() == SystemDictionary::String_klass(),
737 "must be java String");
738 assert(str2->klass() == SystemDictionary::String_klass(),
739 "must be java String");
740 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
741 bool is_latin1 = java_lang_String::is_latin1(str1);
742 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
743 bool is_latin2 = java_lang_String::is_latin1(str2);
744
745 if (is_latin1 != is_latin2) {
746 // Strings with different coders are never equal.
747 return false;
748 }
749 return value_equals(value1, value2);
750 }
751
752 void java_lang_String::print(oop java_string, outputStream* st) {
753 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
754 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
755
756 if (value == NULL) {
757 // This can happen if, e.g., printing a String
758 // object before its initializer has been called
759 st->print("NULL");
760 return;
761 }
762
763 int length = java_lang_String::length(java_string, value);
764 bool is_latin1 = java_lang_String::is_latin1(java_string);
765
766 st->print("\"");
767 for (int index = 0; index < length; index++) {
768 st->print("%c", (!is_latin1) ? value->char_at(index) :
769 ((jchar) value->byte_at(index)) & 0xff );
770 }
771 st->print("\"");
772 }
773
774
775 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
776 assert(mirror.not_null() && fd->is_static(), "just checking");
777 if (fd->has_initial_value()) {
778 BasicType t = fd->field_type();
779 switch (t) {
780 case T_BYTE:
781 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
782 break;
783 case T_BOOLEAN:
784 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
785 break;
786 case T_CHAR:
787 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
788 break;
789 case T_SHORT:
790 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
791 break;
792 case T_INT:
793 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
794 break;
795 case T_FLOAT:
796 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
797 break;
798 case T_DOUBLE:
799 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
800 break;
801 case T_LONG:
802 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
803 break;
804 case T_OBJECT:
805 {
806 assert(fd->signature() == vmSymbols::string_signature(),
807 "just checking");
808 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
809 // Archive the String field and update the pointer.
810 oop s = mirror()->obj_field(fd->offset());
811 oop archived_s = StringTable::create_archived_string(s, CHECK);
812 mirror()->obj_field_put(fd->offset(), archived_s);
813 } else {
814 oop string = fd->string_initial_value(CHECK);
815 mirror()->obj_field_put(fd->offset(), string);
816 }
817 }
818 break;
819 default:
820 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
821 "Illegal ConstantValue attribute in class file");
822 }
823 }
824 }
825
826
827 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
828 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
829
830 // If the offset was read from the shared archive, it was fixed up already
831 if (!k->is_shared()) {
832 if (k->is_instance_klass()) {
833 // During bootstrap, java.lang.Class wasn't loaded so static field
834 // offsets were computed without the size added it. Go back and
835 // update all the static field offsets to included the size.
836 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
837 if (fs.access_flags().is_static()) {
838 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
839 fs.set_offset(real_offset);
840 }
841 }
842 }
843 }
844
845 if (k->is_shared() && k->has_raw_archived_mirror()) {
846 if (HeapShared::open_archive_heap_region_mapped()) {
847 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
848 assert(present, "Missing archived mirror for %s", k->external_name());
849 return;
850 } else {
851 k->set_java_mirror_handle(NULL);
852 k->clear_has_raw_archived_mirror();
853 }
854 }
855 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
856 }
857
858 void java_lang_Class::initialize_mirror_fields(Klass* k,
859 Handle mirror,
860 Handle protection_domain,
861 TRAPS) {
862 // Allocate a simple java object for a lock.
863 // This needs to be a java object because during class initialization
864 // it can be held across a java call.
865 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
866 set_init_lock(mirror(), r);
867
868 // Set protection domain also
869 set_protection_domain(mirror(), protection_domain());
870
871 // Initialize static fields
872 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
873 }
874
875 // Set the java.lang.Module module field in the java_lang_Class mirror
876 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
877 if (module.is_null()) {
878 // During startup, the module may be NULL only if java.base has not been defined yet.
879 // Put the class on the fixup_module_list to patch later when the java.lang.Module
880 // for java.base is known. But note that since we captured the NULL module another
881 // thread may have completed that initialization.
882
883 bool javabase_was_defined = false;
884 {
885 MutexLocker m1(Module_lock, THREAD);
886 // Keep list of classes needing java.base module fixup
887 if (!ModuleEntryTable::javabase_defined()) {
888 assert(k->java_mirror() != NULL, "Class's mirror is null");
889 k->class_loader_data()->inc_keep_alive();
890 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
891 fixup_module_field_list()->push(k);
892 } else {
893 javabase_was_defined = true;
894 }
895 }
896
897 // If java.base was already defined then patch this particular class with java.base.
898 if (javabase_was_defined) {
899 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
900 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
901 "Setting class module field, " JAVA_BASE_NAME " should be defined");
902 Handle javabase_handle(THREAD, javabase_entry->module());
903 set_module(mirror(), javabase_handle());
904 }
905 } else {
906 assert(Universe::is_module_initialized() ||
907 (ModuleEntryTable::javabase_defined() &&
908 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
909 "Incorrect java.lang.Module specification while creating mirror");
910 set_module(mirror(), module());
911 }
912 }
913
914 // Statically allocate fixup lists because they always get created.
915 void java_lang_Class::allocate_fixup_lists() {
916 GrowableArray<Klass*>* mirror_list =
917 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
918 set_fixup_mirror_list(mirror_list);
919
920 GrowableArray<Klass*>* module_list =
921 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
922 set_fixup_module_field_list(module_list);
923 }
924
925 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
926 Handle module, Handle protection_domain, TRAPS) {
927 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
928 assert(k->java_mirror() == NULL, "should only assign mirror once");
929
930 // Use this moment of initialization to cache modifier_flags also,
931 // to support Class.getModifiers(). Instance classes recalculate
932 // the cached flags after the class file is parsed, but before the
933 // class is put into the system dictionary.
934 int computed_modifiers = k->compute_modifier_flags(CHECK);
935 k->set_modifier_flags(computed_modifiers);
936 // Class_klass has to be loaded because it is used to allocate
937 // the mirror.
938 if (SystemDictionary::Class_klass_loaded()) {
939 // Allocate mirror (java.lang.Class instance)
940 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
941 Handle mirror(THREAD, mirror_oop);
942 Handle comp_mirror;
943
944 // Setup indirection from mirror->klass
945 java_lang_Class::set_klass(mirror(), k);
946
947 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
948 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
949
950 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
951
952 // It might also have a component mirror. This mirror must already exist.
953 if (k->is_array_klass()) {
954 if (k->is_typeArray_klass()) {
955 BasicType type = TypeArrayKlass::cast(k)->element_type();
956 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
957 } else {
958 assert(k->is_objArray_klass(), "Must be");
959 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
960 assert(element_klass != NULL, "Must have an element klass");
961 comp_mirror = Handle(THREAD, element_klass->java_mirror());
962 }
963 assert(comp_mirror() != NULL, "must have a mirror");
964
965 // Two-way link between the array klass and its component mirror:
966 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
967 set_component_mirror(mirror(), comp_mirror());
968 // See below for ordering dependencies between field array_klass in component mirror
969 // and java_mirror in this klass.
970 } else {
971 assert(k->is_instance_klass(), "Must be");
972
973 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
974 if (HAS_PENDING_EXCEPTION) {
975 // If any of the fields throws an exception like OOM remove the klass field
976 // from the mirror so GC doesn't follow it after the klass has been deallocated.
977 // This mirror looks like a primitive type, which logically it is because it
978 // it represents no class.
979 java_lang_Class::set_klass(mirror(), NULL);
980 return;
981 }
982 }
983
984 // set the classLoader field in the java_lang_Class instance
985 assert(class_loader() == k->class_loader(), "should be same");
986 set_class_loader(mirror(), class_loader());
987
988 // Setup indirection from klass->mirror
989 // after any exceptions can happen during allocations.
990 k->set_java_mirror(mirror);
991
992 // Set the module field in the java_lang_Class instance. This must be done
993 // after the mirror is set.
994 set_mirror_module_field(k, mirror, module, THREAD);
995
996 if (comp_mirror() != NULL) {
997 // Set after k->java_mirror() is published, because compiled code running
998 // concurrently doesn't expect a k to have a null java_mirror.
999 release_set_array_klass(comp_mirror(), k);
1000 }
1001 } else {
1002 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1003 fixup_mirror_list()->push(k);
1004 }
1005 }
1006
1007 #if INCLUDE_CDS_JAVA_HEAP
1008 // Clears mirror fields. Static final fields with initial values are reloaded
1009 // from constant pool. The object identity hash is in the object header and is
1010 // not affected.
1011 class ResetMirrorField: public FieldClosure {
1012 private:
1013 Handle _m;
1014
1015 public:
1016 ResetMirrorField(Handle mirror) : _m(mirror) {}
1017
1018 void do_field(fieldDescriptor* fd) {
1019 assert(DumpSharedSpaces, "dump time only");
1020 assert(_m.not_null(), "Mirror cannot be NULL");
1021
1022 if (fd->is_static() && fd->has_initial_value()) {
1023 initialize_static_field(fd, _m, Thread::current());
1024 return;
1025 }
1026
1027 BasicType ft = fd->field_type();
1028 switch (ft) {
1029 case T_BYTE:
1030 _m()->byte_field_put(fd->offset(), 0);
1031 break;
1032 case T_CHAR:
1033 _m()->char_field_put(fd->offset(), 0);
1034 break;
1035 case T_DOUBLE:
1036 _m()->double_field_put(fd->offset(), 0);
1037 break;
1038 case T_FLOAT:
1039 _m()->float_field_put(fd->offset(), 0);
1040 break;
1041 case T_INT:
1042 _m()->int_field_put(fd->offset(), 0);
1043 break;
1044 case T_LONG:
1045 _m()->long_field_put(fd->offset(), 0);
1046 break;
1047 case T_SHORT:
1048 _m()->short_field_put(fd->offset(), 0);
1049 break;
1050 case T_BOOLEAN:
1051 _m()->bool_field_put(fd->offset(), false);
1052 break;
1053 case T_ARRAY:
1054 case T_OBJECT: {
1055 // It might be useful to cache the String field, but
1056 // for now just clear out any reference field
1057 oop o = _m()->obj_field(fd->offset());
1058 _m()->obj_field_put(fd->offset(), NULL);
1059 break;
1060 }
1061 default:
1062 ShouldNotReachHere();
1063 break;
1064 }
1065 }
1066 };
1067
1068 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1069 assert(HeapShared::is_heap_object_archiving_allowed(),
1070 "HeapShared::is_heap_object_archiving_allowed() must be true");
1071
1072 for (int t = 0; t <= T_VOID; t++) {
1073 oop m = Universe::_mirrors[t];
1074 if (m != NULL) {
1075 // Update the field at _array_klass_offset to point to the relocated array klass.
1076 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1077 assert(archived_m != NULL, "sanity");
1078 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1079 assert(ak != NULL || t == T_VOID, "should not be NULL");
1080 if (ak != NULL) {
1081 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak, true);
1082 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1083 }
1084
1085 // Clear the fields. Just to be safe
1086 Klass *k = m->klass();
1087 Handle archived_mirror_h(THREAD, archived_m);
1088 ResetMirrorField reset(archived_mirror_h);
1089 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1090
1091 log_trace(cds, heap, mirror)(
1092 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1093 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1094
1095 Universe::_mirrors[t] = archived_m;
1096 }
1097 }
1098
1099 assert(Universe::_mirrors[T_INT] != NULL &&
1100 Universe::_mirrors[T_FLOAT] != NULL &&
1101 Universe::_mirrors[T_DOUBLE] != NULL &&
1102 Universe::_mirrors[T_BYTE] != NULL &&
1103 Universe::_mirrors[T_BOOLEAN] != NULL &&
1104 Universe::_mirrors[T_CHAR] != NULL &&
1105 Universe::_mirrors[T_LONG] != NULL &&
1106 Universe::_mirrors[T_SHORT] != NULL &&
1107 Universe::_mirrors[T_VOID] != NULL, "sanity");
1108
1109 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1110 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1111 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1112 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1113 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1114 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1115 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1116 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1117 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1118 }
1119
1120 //
1121 // After the mirror object is successfully archived, the archived
1122 // klass is set with _has_archived_raw_mirror flag.
1123 //
1124 // The _has_archived_raw_mirror flag is cleared at runtime when the
1125 // archived mirror is restored. If archived java heap data cannot
1126 // be used at runtime, new mirror object is created for the shared
1127 // class. The _has_archived_raw_mirror is cleared also during the process.
1128 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1129 assert(HeapShared::is_heap_object_archiving_allowed(),
1130 "HeapShared::is_heap_object_archiving_allowed() must be true");
1131
1132 // Mirror is already archived
1133 if (k->has_raw_archived_mirror()) {
1134 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1135 return k->archived_java_mirror_raw();
1136 }
1137
1138 // No mirror
1139 oop mirror = k->java_mirror();
1140 if (mirror == NULL) {
1141 return NULL;
1142 }
1143
1144 if (k->is_instance_klass()) {
1145 InstanceKlass *ik = InstanceKlass::cast(k);
1146 assert(ik->signers() == NULL, "class with signer should have been excluded");
1147
1148 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1149 ik->is_shared_app_class())) {
1150 // Archiving mirror for classes from non-builtin loaders is not
1151 // supported. Clear the _java_mirror within the archived class.
1152 k->set_java_mirror_handle(NULL);
1153 return NULL;
1154 }
1155 }
1156
1157 // Now start archiving the mirror object
1158 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1159 if (archived_mirror == NULL) {
1160 return NULL;
1161 }
1162
1163 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1164 if (archived_mirror == NULL) {
1165 return NULL;
1166 }
1167
1168 k->set_archived_java_mirror_raw(archived_mirror);
1169
1170 k->set_has_raw_archived_mirror();
1171
1172 ResourceMark rm;
1173 log_trace(cds, heap, mirror)(
1174 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1175 k->external_name(), p2i(mirror), p2i(archived_mirror));
1176
1177 return archived_mirror;
1178 }
1179
1180 // The process is based on create_mirror().
1181 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1182 oop archived_mirror,
1183 Thread *THREAD) {
1184 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1185 // to archived metadata and objects below.
1186 Klass *c = archived_mirror->klass();
1187 Handle archived_mirror_h(THREAD, archived_mirror);
1188 ResetMirrorField reset(archived_mirror_h);
1189 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1190
1191 if (k->is_array_klass()) {
1192 oop archived_comp_mirror;
1193 if (k->is_typeArray_klass()) {
1194 // The primitive type mirrors are already archived. Get the archived mirror.
1195 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1196 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1197 assert(archived_comp_mirror != NULL, "Must be");
1198 } else {
1199 assert(k->is_objArray_klass(), "Must be");
1200 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1201 assert(element_klass != NULL, "Must have an element klass");
1202 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1203 if (archived_comp_mirror == NULL) {
1204 return NULL;
1205 }
1206 }
1207 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1208 } else {
1209 assert(k->is_instance_klass(), "Must be");
1210
1211 // Reset local static fields in the mirror
1212 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1213
1214 java_lang_Class:set_init_lock(archived_mirror, NULL);
1215
1216 set_protection_domain(archived_mirror, NULL);
1217 }
1218
1219 // clear class loader and mirror_module_field
1220 set_class_loader(archived_mirror, NULL);
1221 set_module(archived_mirror, NULL);
1222
1223 // The archived mirror's field at _klass_offset is still pointing to the original
1224 // klass. Updated the field in the archived mirror to point to the relocated
1225 // klass in the archive.
1226 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror), true);
1227 log_debug(cds, heap, mirror)(
1228 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1229 p2i(as_Klass(mirror)), p2i(reloc_k));
1230 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1231
1232 // The field at _array_klass_offset is pointing to the original one dimension
1233 // higher array klass if exists. Relocate the pointer.
1234 Klass *arr = array_klass_acquire(mirror);
1235 if (arr != NULL) {
1236 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr, true);
1237 log_debug(cds, heap, mirror)(
1238 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1239 p2i(arr), p2i(reloc_arr));
1240 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1241 }
1242 return archived_mirror;
1243 }
1244
1245 void java_lang_Class::update_archived_primitive_mirror_native_pointers(oop archived_mirror) {
1246 if (MetaspaceShared::relocation_delta() != 0) {
1247 assert(archived_mirror->metadata_field(_klass_offset) == NULL, "must be for primitive class");
1248
1249 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset));
1250 if (ak != NULL) {
1251 archived_mirror->metadata_field_put(_array_klass_offset,
1252 (Klass*)(address(ak) + MetaspaceShared::relocation_delta()));
1253 }
1254 }
1255 }
1256
1257 void java_lang_Class::update_archived_mirror_native_pointers(oop archived_mirror) {
1258 if (MetaspaceShared::relocation_delta() != 0) {
1259 Klass* k = ((Klass*)archived_mirror->metadata_field(_klass_offset));
1260 archived_mirror->metadata_field_put(_klass_offset,
1261 (Klass*)(address(k) + MetaspaceShared::relocation_delta()));
1262
1263 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset));
1264 if (ak != NULL) {
1265 archived_mirror->metadata_field_put(_array_klass_offset,
1266 (Klass*)(address(ak) + MetaspaceShared::relocation_delta()));
1267 }
1268 }
1269 }
1270
1271
1272 // Returns true if the mirror is updated, false if no archived mirror
1273 // data is present. After the archived mirror object is restored, the
1274 // shared klass' _has_raw_archived_mirror flag is cleared.
1275 bool java_lang_Class::restore_archived_mirror(Klass *k,
1276 Handle class_loader, Handle module,
1277 Handle protection_domain, TRAPS) {
1278 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1279 // see more details in SystemDictionary::resolve_well_known_classes().
1280 if (!SystemDictionary::Class_klass_loaded()) {
1281 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1282 fixup_mirror_list()->push(k);
1283 return true;
1284 }
1285
1286 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1287 if (m == NULL) {
1288 return false;
1289 }
1290
1291 // mirror is archived, restore
1292 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1293 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1294 update_archived_mirror_native_pointers(m);
1295 assert(as_Klass(m) == k, "must be");
1296 Handle mirror(THREAD, m);
1297
1298 if (!k->is_array_klass()) {
1299 // - local static final fields with initial values were initialized at dump time
1300
1301 // create the init_lock
1302 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1303 set_init_lock(mirror(), r);
1304
1305 if (protection_domain.not_null()) {
1306 set_protection_domain(mirror(), protection_domain());
1307 }
1308 }
1309
1310 assert(class_loader() == k->class_loader(), "should be same");
1311 if (class_loader.not_null()) {
1312 set_class_loader(mirror(), class_loader());
1313 }
1314
1315 k->set_java_mirror(mirror);
1316 k->clear_has_raw_archived_mirror();
1317
1318 set_mirror_module_field(k, mirror, module, THREAD);
1319
1320 ResourceMark rm;
1321 log_trace(cds, heap, mirror)(
1322 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1323
1324 return true;
1325 }
1326 #endif // INCLUDE_CDS_JAVA_HEAP
1327
1328 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1329 assert(_module_offset != 0, "must have been computed already");
1330 java_lang_Class::set_module(k->java_mirror(), module());
1331 }
1332
1333 int java_lang_Class::oop_size(oop java_class) {
1334 assert(_oop_size_offset != 0, "must be set");
1335 int size = java_class->int_field(_oop_size_offset);
1336 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1337 return size;
1338 }
1339
1340
1341 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1342 assert(_oop_size_offset != 0, "must be set");
1343 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1344 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1345 }
1346
1347 int java_lang_Class::static_oop_field_count(oop java_class) {
1348 assert(_static_oop_field_count_offset != 0, "must be set");
1349 return java_class->int_field(_static_oop_field_count_offset);
1350 }
1351
1352 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1353 assert(_static_oop_field_count_offset != 0, "must be set");
1354 return java_class->int_field_raw(_static_oop_field_count_offset);
1355 }
1356
1357 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1358 assert(_static_oop_field_count_offset != 0, "must be set");
1359 java_class->int_field_put(_static_oop_field_count_offset, size);
1360 }
1361
1362 oop java_lang_Class::protection_domain(oop java_class) {
1363 assert(_protection_domain_offset != 0, "must be set");
1364 return java_class->obj_field(_protection_domain_offset);
1365 }
1366 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1367 assert(_protection_domain_offset != 0, "must be set");
1368 java_class->obj_field_put(_protection_domain_offset, pd);
1369 }
1370
1371 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1372 assert(_component_mirror_offset != 0, "must be set");
1373 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1374 }
1375 oop java_lang_Class::component_mirror(oop java_class) {
1376 assert(_component_mirror_offset != 0, "must be set");
1377 return java_class->obj_field(_component_mirror_offset);
1378 }
1379
1380 oop java_lang_Class::init_lock(oop java_class) {
1381 assert(_init_lock_offset != 0, "must be set");
1382 return java_class->obj_field(_init_lock_offset);
1383 }
1384 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1385 assert(_init_lock_offset != 0, "must be set");
1386 java_class->obj_field_put(_init_lock_offset, init_lock);
1387 }
1388
1389 objArrayOop java_lang_Class::signers(oop java_class) {
1390 assert(_signers_offset != 0, "must be set");
1391 return (objArrayOop)java_class->obj_field(_signers_offset);
1392 }
1393 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1394 assert(_signers_offset != 0, "must be set");
1395 java_class->obj_field_put(_signers_offset, (oop)signers);
1396 }
1397
1398
1399 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1400 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1401 if (_class_loader_offset != 0) {
1402 java_class->obj_field_put(_class_loader_offset, loader);
1403 }
1404 }
1405
1406 oop java_lang_Class::class_loader(oop java_class) {
1407 assert(_class_loader_offset != 0, "must be set");
1408 return java_class->obj_field(_class_loader_offset);
1409 }
1410
1411 oop java_lang_Class::module(oop java_class) {
1412 assert(_module_offset != 0, "must be set");
1413 return java_class->obj_field(_module_offset);
1414 }
1415
1416 void java_lang_Class::set_module(oop java_class, oop module) {
1417 assert(_module_offset != 0, "must be set");
1418 java_class->obj_field_put(_module_offset, module);
1419 }
1420
1421 oop java_lang_Class::name(Handle java_class, TRAPS) {
1422 assert(_name_offset != 0, "must be set");
1423 oop o = java_class->obj_field(_name_offset);
1424 if (o == NULL) {
1425 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1426 java_class->obj_field_put(_name_offset, o);
1427 }
1428 return o;
1429 }
1430
1431 oop java_lang_Class::source_file(oop java_class) {
1432 assert(_source_file_offset != 0, "must be set");
1433 return java_class->obj_field(_source_file_offset);
1434 }
1435
1436 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1437 assert(_source_file_offset != 0, "must be set");
1438 java_class->obj_field_put(_source_file_offset, source_file);
1439 }
1440
1441 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1442 // This should be improved by adding a field at the Java level or by
1443 // introducing a new VM klass (see comment in ClassFileParser)
1444 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1445 if (type != T_VOID) {
1446 Klass* aklass = Universe::typeArrayKlassObj(type);
1447 assert(aklass != NULL, "correct bootstrap");
1448 release_set_array_klass(java_class, aklass);
1449 }
1450 #ifdef ASSERT
1451 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1452 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1453 #endif
1454 return java_class;
1455 }
1456
1457
1458 Klass* java_lang_Class::as_Klass(oop java_class) {
1459 //%note memory_2
1460 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1461 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1462 assert(k == NULL || k->is_klass(), "type check");
1463 return k;
1464 }
1465
1466 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1467 //%note memory_2
1468 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1469 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1470 assert(k == NULL || k->is_klass(), "type check");
1471 return k;
1472 }
1473
1474
1475 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1476 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1477 java_class->metadata_field_put(_klass_offset, klass);
1478 }
1479
1480
1481 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1482 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1483 Symbol* name = NULL;
1484 bool is_instance = false;
1485 if (is_primitive(java_class)) {
1486 name = vmSymbols::type_signature(primitive_type(java_class));
1487 } else {
1488 Klass* k = as_Klass(java_class);
1489 is_instance = k->is_instance_klass();
1490 name = k->name();
1491 }
1492 if (name == NULL) {
1493 st->print("<null>");
1494 return;
1495 }
1496 if (is_instance) st->print("L");
1497 st->write((char*) name->base(), (int) name->utf8_length());
1498 if (is_instance) st->print(";");
1499 }
1500
1501 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1502 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1503 Symbol* name;
1504 if (is_primitive(java_class)) {
1505 name = vmSymbols::type_signature(primitive_type(java_class));
1506 // Because this can create a new symbol, the caller has to decrement
1507 // the refcount, so make adjustment here and below for symbols returned
1508 // that are not created or incremented due to a successful lookup.
1509 name->increment_refcount();
1510 } else {
1511 Klass* k = as_Klass(java_class);
1512 if (!k->is_instance_klass()) {
1513 name = k->name();
1514 name->increment_refcount();
1515 } else {
1516 ResourceMark rm;
1517 const char* sigstr = k->signature_name();
1518 int siglen = (int) strlen(sigstr);
1519 if (!intern_if_not_found) {
1520 name = SymbolTable::probe(sigstr, siglen);
1521 } else {
1522 name = SymbolTable::new_symbol(sigstr, siglen);
1523 }
1524 }
1525 }
1526 return name;
1527 }
1528
1529 // Returns the Java name for this Java mirror (Resource allocated)
1530 // See Klass::external_name().
1531 // For primitive type Java mirrors, its type name is returned.
1532 const char* java_lang_Class::as_external_name(oop java_class) {
1533 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1534 const char* name = NULL;
1535 if (is_primitive(java_class)) {
1536 name = type2name(primitive_type(java_class));
1537 } else {
1538 name = as_Klass(java_class)->external_name();
1539 }
1540 if (name == NULL) {
1541 name = "<null>";
1542 }
1543 return name;
1544 }
1545
1546 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1547 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1548 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1549 return k;
1550 }
1551
1552
1553 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1554 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1555 java_class->release_metadata_field_put(_array_klass_offset, klass);
1556 }
1557
1558
1559 BasicType java_lang_Class::primitive_type(oop java_class) {
1560 assert(java_lang_Class::is_primitive(java_class), "just checking");
1561 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1562 BasicType type = T_VOID;
1563 if (ak != NULL) {
1564 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1565 type = ArrayKlass::cast(ak)->element_type();
1566 } else {
1567 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1568 }
1569 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1570 return type;
1571 }
1572
1573 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1574 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1575 if (is_primitive(java_class)) {
1576 if (reference_klass != NULL)
1577 (*reference_klass) = NULL;
1578 return primitive_type(java_class);
1579 } else {
1580 if (reference_klass != NULL)
1581 (*reference_klass) = as_Klass(java_class);
1582 return T_OBJECT;
1583 }
1584 }
1585
1586
1587 oop java_lang_Class::primitive_mirror(BasicType t) {
1588 oop mirror = Universe::java_mirror(t);
1589 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1590 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1591 return mirror;
1592 }
1593
1594 bool java_lang_Class::offsets_computed = false;
1595 int java_lang_Class::classRedefinedCount_offset = -1;
1596
1597 #define CLASS_FIELDS_DO(macro) \
1598 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1599 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1600 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1601 macro(_module_offset, k, "module", module_signature, false); \
1602 macro(_name_offset, k, "name", string_signature, false); \
1603
1604 void java_lang_Class::compute_offsets() {
1605 if (offsets_computed) {
1606 return;
1607 }
1608
1609 offsets_computed = true;
1610
1611 InstanceKlass* k = SystemDictionary::Class_klass();
1612 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1613
1614 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1615 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1616 // GC treats them the same.
1617 _init_lock_offset = _component_mirror_offset;
1618
1619 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1620 }
1621
1622 #if INCLUDE_CDS
1623 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1624 f->do_bool(&offsets_computed);
1625 f->do_u4((u4*)&_init_lock_offset);
1626
1627 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1628
1629 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1630 }
1631 #endif
1632
1633 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1634 if (classRedefinedCount_offset == -1) {
1635 // If we don't have an offset for it then just return -1 as a marker.
1636 return -1;
1637 }
1638
1639 return the_class_mirror->int_field(classRedefinedCount_offset);
1640 }
1641
1642 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1643 if (classRedefinedCount_offset == -1) {
1644 // If we don't have an offset for it then nothing to set.
1645 return;
1646 }
1647
1648 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1649 }
1650
1651
1652 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1653 // platform thread structure, and a eetop offset which was used for thread
1654 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1655 // merged, so in the HotSpot VM we just use the eetop field for the thread
1656 // instead of the privateInfo_offset.
1657 //
1658 // Note: The stackSize field is only present starting in 1.4.
1659
1660 int java_lang_Thread::_name_offset = 0;
1661 int java_lang_Thread::_group_offset = 0;
1662 int java_lang_Thread::_contextClassLoader_offset = 0;
1663 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1664 int java_lang_Thread::_priority_offset = 0;
1665 int java_lang_Thread::_eetop_offset = 0;
1666 int java_lang_Thread::_interrupted_offset = 0;
1667 int java_lang_Thread::_daemon_offset = 0;
1668 int java_lang_Thread::_stillborn_offset = 0;
1669 int java_lang_Thread::_stackSize_offset = 0;
1670 int java_lang_Thread::_tid_offset = 0;
1671 int java_lang_Thread::_thread_status_offset = 0;
1672 int java_lang_Thread::_park_blocker_offset = 0;
1673
1674 #define THREAD_FIELDS_DO(macro) \
1675 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1676 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1677 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1678 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1679 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1680 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1681 macro(_eetop_offset, k, "eetop", long_signature, false); \
1682 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1683 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1684 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1685 macro(_tid_offset, k, "tid", long_signature, false); \
1686 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1687 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false)
1688
1689 void java_lang_Thread::compute_offsets() {
1690 assert(_group_offset == 0, "offsets should be initialized only once");
1691
1692 InstanceKlass* k = SystemDictionary::Thread_klass();
1693 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1694 }
1695
1696 #if INCLUDE_CDS
1697 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1698 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1699 }
1700 #endif
1701
1702 JavaThread* java_lang_Thread::thread(oop java_thread) {
1703 return (JavaThread*)java_thread->address_field(_eetop_offset);
1704 }
1705
1706
1707 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1708 java_thread->address_field_put(_eetop_offset, (address)thread);
1709 }
1710
1711 bool java_lang_Thread::interrupted(oop java_thread) {
1712 // Make sure the caller can safely access oops.
1713 assert(Thread::current()->is_VM_thread() ||
1714 (JavaThread::current()->thread_state() != _thread_blocked &&
1715 JavaThread::current()->thread_state() != _thread_in_native),
1716 "Unsafe access to oop");
1717 return java_thread->bool_field_volatile(_interrupted_offset);
1718 }
1719
1720 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1721 // Make sure the caller can safely access oops.
1722 assert(Thread::current()->is_VM_thread() ||
1723 (JavaThread::current()->thread_state() != _thread_blocked &&
1724 JavaThread::current()->thread_state() != _thread_in_native),
1725 "Unsafe access to oop");
1726 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1727 }
1728
1729
1730 oop java_lang_Thread::name(oop java_thread) {
1731 return java_thread->obj_field(_name_offset);
1732 }
1733
1734
1735 void java_lang_Thread::set_name(oop java_thread, oop name) {
1736 java_thread->obj_field_put(_name_offset, name);
1737 }
1738
1739
1740 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1741 return (ThreadPriority)java_thread->int_field(_priority_offset);
1742 }
1743
1744
1745 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1746 java_thread->int_field_put(_priority_offset, priority);
1747 }
1748
1749
1750 oop java_lang_Thread::threadGroup(oop java_thread) {
1751 return java_thread->obj_field(_group_offset);
1752 }
1753
1754
1755 bool java_lang_Thread::is_stillborn(oop java_thread) {
1756 return java_thread->bool_field(_stillborn_offset) != 0;
1757 }
1758
1759
1760 // We never have reason to turn the stillborn bit off
1761 void java_lang_Thread::set_stillborn(oop java_thread) {
1762 java_thread->bool_field_put(_stillborn_offset, true);
1763 }
1764
1765
1766 bool java_lang_Thread::is_alive(oop java_thread) {
1767 JavaThread* thr = java_lang_Thread::thread(java_thread);
1768 return (thr != NULL);
1769 }
1770
1771
1772 bool java_lang_Thread::is_daemon(oop java_thread) {
1773 return java_thread->bool_field(_daemon_offset) != 0;
1774 }
1775
1776
1777 void java_lang_Thread::set_daemon(oop java_thread) {
1778 java_thread->bool_field_put(_daemon_offset, true);
1779 }
1780
1781 oop java_lang_Thread::context_class_loader(oop java_thread) {
1782 return java_thread->obj_field(_contextClassLoader_offset);
1783 }
1784
1785 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1786 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1787 }
1788
1789
1790 jlong java_lang_Thread::stackSize(oop java_thread) {
1791 return java_thread->long_field(_stackSize_offset);
1792 }
1793
1794 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1795 void java_lang_Thread::set_thread_status(oop java_thread,
1796 java_lang_Thread::ThreadStatus status) {
1797 java_thread->int_field_put(_thread_status_offset, status);
1798 }
1799
1800 // Read thread status value from threadStatus field in java.lang.Thread java class.
1801 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1802 // Make sure the caller is operating on behalf of the VM or is
1803 // running VM code (state == _thread_in_vm).
1804 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1805 JavaThread::current()->thread_state() == _thread_in_vm,
1806 "Java Thread is not running in vm");
1807 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1808 }
1809
1810
1811 jlong java_lang_Thread::thread_id(oop java_thread) {
1812 return java_thread->long_field(_tid_offset);
1813 }
1814
1815 oop java_lang_Thread::park_blocker(oop java_thread) {
1816 return java_thread->obj_field(_park_blocker_offset);
1817 }
1818
1819 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1820 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1821 switch (status) {
1822 case NEW : return "NEW";
1823 case RUNNABLE : return "RUNNABLE";
1824 case SLEEPING : return "TIMED_WAITING (sleeping)";
1825 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1826 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1827 case PARKED : return "WAITING (parking)";
1828 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1829 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1830 case TERMINATED : return "TERMINATED";
1831 default : return "UNKNOWN";
1832 };
1833 }
1834 int java_lang_ThreadGroup::_parent_offset = 0;
1835 int java_lang_ThreadGroup::_name_offset = 0;
1836 int java_lang_ThreadGroup::_threads_offset = 0;
1837 int java_lang_ThreadGroup::_groups_offset = 0;
1838 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1839 int java_lang_ThreadGroup::_destroyed_offset = 0;
1840 int java_lang_ThreadGroup::_daemon_offset = 0;
1841 int java_lang_ThreadGroup::_nthreads_offset = 0;
1842 int java_lang_ThreadGroup::_ngroups_offset = 0;
1843
1844 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1845 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1846 return java_thread_group->obj_field(_parent_offset);
1847 }
1848
1849 // ("name as oop" accessor is not necessary)
1850
1851 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1852 oop name = java_thread_group->obj_field(_name_offset);
1853 // ThreadGroup.name can be null
1854 if (name != NULL) {
1855 return java_lang_String::as_utf8_string(name);
1856 }
1857 return NULL;
1858 }
1859
1860 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1861 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1862 return java_thread_group->int_field(_nthreads_offset);
1863 }
1864
1865 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1866 oop threads = java_thread_group->obj_field(_threads_offset);
1867 assert(threads != NULL, "threadgroups should have threads");
1868 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1869 return objArrayOop(threads);
1870 }
1871
1872 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1873 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1874 return java_thread_group->int_field(_ngroups_offset);
1875 }
1876
1877 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1878 oop groups = java_thread_group->obj_field(_groups_offset);
1879 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1880 return objArrayOop(groups);
1881 }
1882
1883 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1884 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1885 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1886 }
1887
1888 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1889 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1890 return java_thread_group->bool_field(_destroyed_offset) != 0;
1891 }
1892
1893 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1894 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1895 return java_thread_group->bool_field(_daemon_offset) != 0;
1896 }
1897
1898 #define THREADGROUP_FIELDS_DO(macro) \
1899 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1900 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1901 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1902 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1903 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1904 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1905 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1906 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1907 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1908
1909 void java_lang_ThreadGroup::compute_offsets() {
1910 assert(_parent_offset == 0, "offsets should be initialized only once");
1911
1912 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1913 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1914 }
1915
1916 #if INCLUDE_CDS
1917 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1918 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1919 }
1920 #endif
1921
1922 #define THROWABLE_FIELDS_DO(macro) \
1923 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1924 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1925 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1926 macro(depth_offset, k, "depth", int_signature, false); \
1927 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1928
1929 void java_lang_Throwable::compute_offsets() {
1930 InstanceKlass* k = SystemDictionary::Throwable_klass();
1931 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1932 }
1933
1934 #if INCLUDE_CDS
1935 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1936 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1937 }
1938 #endif
1939
1940 oop java_lang_Throwable::unassigned_stacktrace() {
1941 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1942 oop base = ik->static_field_base_raw();
1943 return base->obj_field(static_unassigned_stacktrace_offset);
1944 }
1945
1946 oop java_lang_Throwable::backtrace(oop throwable) {
1947 return throwable->obj_field_acquire(backtrace_offset);
1948 }
1949
1950
1951 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1952 throwable->release_obj_field_put(backtrace_offset, value);
1953 }
1954
1955 int java_lang_Throwable::depth(oop throwable) {
1956 return throwable->int_field(depth_offset);
1957 }
1958
1959 void java_lang_Throwable::set_depth(oop throwable, int value) {
1960 throwable->int_field_put(depth_offset, value);
1961 }
1962
1963 oop java_lang_Throwable::message(oop throwable) {
1964 return throwable->obj_field(detailMessage_offset);
1965 }
1966
1967
1968 // Return Symbol for detailed_message or NULL
1969 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1970 PRESERVE_EXCEPTION_MARK; // Keep original exception
1971 oop detailed_message = java_lang_Throwable::message(throwable);
1972 if (detailed_message != NULL) {
1973 return java_lang_String::as_symbol(detailed_message);
1974 }
1975 return NULL;
1976 }
1977
1978 void java_lang_Throwable::set_message(oop throwable, oop value) {
1979 throwable->obj_field_put(detailMessage_offset, value);
1980 }
1981
1982
1983 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1984 throwable->obj_field_put(stackTrace_offset, st_element_array);
1985 }
1986
1987 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1988 set_stacktrace(throwable, NULL);
1989 }
1990
1991
1992 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1993 ResourceMark rm;
1994 Klass* k = throwable->klass();
1995 assert(k != NULL, "just checking");
1996 st->print("%s", k->external_name());
1997 oop msg = message(throwable);
1998 if (msg != NULL) {
1999 st->print(": %s", java_lang_String::as_utf8_string(msg));
2000 }
2001 }
2002
2003 // After this many redefines, the stack trace is unreliable.
2004 const int MAX_VERSION = USHRT_MAX;
2005
2006 static inline bool version_matches(Method* method, int version) {
2007 assert(version < MAX_VERSION, "version is too big");
2008 return method != NULL && (method->constants()->version() == version);
2009 }
2010
2011 // This class provides a simple wrapper over the internal structure of
2012 // exception backtrace to insulate users of the backtrace from needing
2013 // to know what it looks like.
2014 // The code of this class is not GC safe. Allocations can only happen
2015 // in expand().
2016 class BacktraceBuilder: public StackObj {
2017 friend class BacktraceIterator;
2018 private:
2019 Handle _backtrace;
2020 objArrayOop _head;
2021 typeArrayOop _methods;
2022 typeArrayOop _bcis;
2023 objArrayOop _mirrors;
2024 typeArrayOop _names; // Needed to insulate method name against redefinition.
2025 // This is set to a java.lang.Boolean(true) if the top frame
2026 // of the backtrace is omitted because it shall be hidden.
2027 // Else it is null.
2028 oop _has_hidden_top_frame;
2029 int _index;
2030 NoSafepointVerifier _nsv;
2031
2032 enum {
2033 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2034 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2035 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2036 trace_names_offset = java_lang_Throwable::trace_names_offset,
2037 trace_next_offset = java_lang_Throwable::trace_next_offset,
2038 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2039 trace_size = java_lang_Throwable::trace_size,
2040 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2041 };
2042
2043 // get info out of chunks
2044 static typeArrayOop get_methods(objArrayHandle chunk) {
2045 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2046 assert(methods != NULL, "method array should be initialized in backtrace");
2047 return methods;
2048 }
2049 static typeArrayOop get_bcis(objArrayHandle chunk) {
2050 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2051 assert(bcis != NULL, "bci array should be initialized in backtrace");
2052 return bcis;
2053 }
2054 static objArrayOop get_mirrors(objArrayHandle chunk) {
2055 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2056 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2057 return mirrors;
2058 }
2059 static typeArrayOop get_names(objArrayHandle chunk) {
2060 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2061 assert(names != NULL, "names array should be initialized in backtrace");
2062 return names;
2063 }
2064 static oop get_has_hidden_top_frame(objArrayHandle chunk) {
2065 oop hidden = chunk->obj_at(trace_hidden_offset);
2066 return hidden;
2067 }
2068
2069 public:
2070
2071 // constructor for new backtrace
2072 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL), _has_hidden_top_frame(NULL) {
2073 expand(CHECK);
2074 _backtrace = Handle(THREAD, _head);
2075 _index = 0;
2076 }
2077
2078 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2079 _methods = get_methods(backtrace);
2080 _bcis = get_bcis(backtrace);
2081 _mirrors = get_mirrors(backtrace);
2082 _names = get_names(backtrace);
2083 _has_hidden_top_frame = get_has_hidden_top_frame(backtrace);
2084 assert(_methods->length() == _bcis->length() &&
2085 _methods->length() == _mirrors->length() &&
2086 _mirrors->length() == _names->length(),
2087 "method and source information arrays should match");
2088
2089 // head is the preallocated backtrace
2090 _head = backtrace();
2091 _backtrace = Handle(thread, _head);
2092 _index = 0;
2093 }
2094
2095 void expand(TRAPS) {
2096 objArrayHandle old_head(THREAD, _head);
2097 PauseNoSafepointVerifier pnsv(&_nsv);
2098
2099 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2100 objArrayHandle new_head(THREAD, head);
2101
2102 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2103 typeArrayHandle new_methods(THREAD, methods);
2104
2105 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2106 typeArrayHandle new_bcis(THREAD, bcis);
2107
2108 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2109 objArrayHandle new_mirrors(THREAD, mirrors);
2110
2111 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2112 typeArrayHandle new_names(THREAD, names);
2113
2114 if (!old_head.is_null()) {
2115 old_head->obj_at_put(trace_next_offset, new_head());
2116 }
2117 new_head->obj_at_put(trace_methods_offset, new_methods());
2118 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2119 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2120 new_head->obj_at_put(trace_names_offset, new_names());
2121 new_head->obj_at_put(trace_hidden_offset, NULL);
2122
2123 _head = new_head();
2124 _methods = new_methods();
2125 _bcis = new_bcis();
2126 _mirrors = new_mirrors();
2127 _names = new_names();
2128 _index = 0;
2129 }
2130
2131 oop backtrace() {
2132 return _backtrace();
2133 }
2134
2135 inline void push(Method* method, int bci, TRAPS) {
2136 // Smear the -1 bci to 0 since the array only holds unsigned
2137 // shorts. The later line number lookup would just smear the -1
2138 // to a 0 even if it could be recorded.
2139 if (bci == SynchronizationEntryBCI) bci = 0;
2140
2141 if (_index >= trace_chunk_size) {
2142 methodHandle mhandle(THREAD, method);
2143 expand(CHECK);
2144 method = mhandle();
2145 }
2146
2147 _methods->ushort_at_put(_index, method->orig_method_idnum());
2148 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2149
2150 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2151 // klass owning the symbols alive so their refcounts aren't decremented.
2152 Symbol* name = method->name();
2153 _names->symbol_at_put(_index, name);
2154
2155 // We need to save the mirrors in the backtrace to keep the class
2156 // from being unloaded while we still have this stack trace.
2157 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2158 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2159 _index++;
2160 }
2161
2162 void set_has_hidden_top_frame(TRAPS) {
2163 if (_has_hidden_top_frame == NULL) {
2164 // It would be nice to add java/lang/Boolean::TRUE here
2165 // to indicate that this backtrace has a hidden top frame.
2166 // But this code is used before TRUE is allocated.
2167 // Therefor let's just use an arbitrary legal oop
2168 // available right here. We only test for != null
2169 // anyways. _methods is a short[].
2170 assert(_methods != NULL, "we need a legal oop");
2171 _has_hidden_top_frame = _methods;
2172 _head->obj_at_put(trace_hidden_offset, _has_hidden_top_frame);
2173 }
2174 }
2175
2176 };
2177
2178 struct BacktraceElement : public StackObj {
2179 int _method_id;
2180 int _bci;
2181 int _version;
2182 Symbol* _name;
2183 Handle _mirror;
2184 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2185 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2186 };
2187
2188 class BacktraceIterator : public StackObj {
2189 int _index;
2190 objArrayHandle _result;
2191 objArrayHandle _mirrors;
2192 typeArrayHandle _methods;
2193 typeArrayHandle _bcis;
2194 typeArrayHandle _names;
2195
2196 void init(objArrayHandle result, Thread* thread) {
2197 // Get method id, bci, version and mirror from chunk
2198 _result = result;
2199 if (_result.not_null()) {
2200 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2201 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2202 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2203 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2204 _index = 0;
2205 }
2206 }
2207 public:
2208 BacktraceIterator(objArrayHandle result, Thread* thread) {
2209 init(result, thread);
2210 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2211 }
2212
2213 BacktraceElement next(Thread* thread) {
2214 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2215 _methods->ushort_at(_index),
2216 Backtrace::version_at(_bcis->int_at(_index)),
2217 Backtrace::bci_at(_bcis->int_at(_index)),
2218 _names->symbol_at(_index));
2219 _index++;
2220
2221 if (_index >= java_lang_Throwable::trace_chunk_size) {
2222 int next_offset = java_lang_Throwable::trace_next_offset;
2223 // Get next chunk
2224 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2225 init(result, thread);
2226 }
2227 return e;
2228 }
2229
2230 bool repeat() {
2231 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2232 }
2233 };
2234
2235
2236 // Print stack trace element to resource allocated buffer
2237 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2238 int version, int bci, Symbol* name) {
2239 ResourceMark rm;
2240
2241 // Get strings and string lengths
2242 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2243 const char* klass_name = holder->external_name();
2244 int buf_len = (int)strlen(klass_name);
2245
2246 char* method_name = name->as_C_string();
2247 buf_len += (int)strlen(method_name);
2248
2249 char* source_file_name = NULL;
2250 Symbol* source = Backtrace::get_source_file_name(holder, version);
2251 if (source != NULL) {
2252 source_file_name = source->as_C_string();
2253 buf_len += (int)strlen(source_file_name);
2254 }
2255
2256 char *module_name = NULL, *module_version = NULL;
2257 ModuleEntry* module = holder->module();
2258 if (module->is_named()) {
2259 module_name = module->name()->as_C_string();
2260 buf_len += (int)strlen(module_name);
2261 if (module->version() != NULL) {
2262 module_version = module->version()->as_C_string();
2263 buf_len += (int)strlen(module_version);
2264 }
2265 }
2266
2267 // Allocate temporary buffer with extra space for formatting and line number
2268 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2269
2270 // Print stack trace line in buffer
2271 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2272
2273 // Print module information
2274 if (module_name != NULL) {
2275 if (module_version != NULL) {
2276 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2277 } else {
2278 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2279 }
2280 }
2281
2282 // The method can be NULL if the requested class version is gone
2283 Method* method = holder->method_with_orig_idnum(method_id, version);
2284 if (!version_matches(method, version)) {
2285 strcat(buf, "Redefined)");
2286 } else {
2287 int line_number = Backtrace::get_line_number(method, bci);
2288 if (line_number == -2) {
2289 strcat(buf, "Native Method)");
2290 } else {
2291 if (source_file_name != NULL && (line_number != -1)) {
2292 // Sourcename and linenumber
2293 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2294 } else if (source_file_name != NULL) {
2295 // Just sourcename
2296 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2297 } else {
2298 // Neither sourcename nor linenumber
2299 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2300 }
2301 CompiledMethod* nm = method->code();
2302 if (WizardMode && nm != NULL) {
2303 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2304 }
2305 }
2306 }
2307
2308 st->print_cr("%s", buf);
2309 }
2310
2311 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2312 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2313 int method_id = method->orig_method_idnum();
2314 int version = method->constants()->version();
2315 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2316 }
2317
2318 /**
2319 * Print the throwable message and its stack trace plus all causes by walking the
2320 * cause chain. The output looks the same as of Throwable.printStackTrace().
2321 */
2322 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2323 // First, print the message.
2324 print(throwable(), st);
2325 st->cr();
2326
2327 // Now print the stack trace.
2328 Thread* THREAD = Thread::current();
2329 while (throwable.not_null()) {
2330 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2331 if (result.is_null()) {
2332 st->print_raw_cr("\t<<no stack trace available>>");
2333 return;
2334 }
2335 BacktraceIterator iter(result, THREAD);
2336
2337 while (iter.repeat()) {
2338 BacktraceElement bte = iter.next(THREAD);
2339 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2340 }
2341 {
2342 // Call getCause() which doesn't necessarily return the _cause field.
2343 EXCEPTION_MARK;
2344 JavaValue cause(T_OBJECT);
2345 JavaCalls::call_virtual(&cause,
2346 throwable,
2347 throwable->klass(),
2348 vmSymbols::getCause_name(),
2349 vmSymbols::void_throwable_signature(),
2350 THREAD);
2351 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2352 if (HAS_PENDING_EXCEPTION) {
2353 CLEAR_PENDING_EXCEPTION;
2354 throwable = Handle();
2355 } else {
2356 throwable = Handle(THREAD, (oop) cause.get_jobject());
2357 if (throwable.not_null()) {
2358 st->print("Caused by: ");
2359 print(throwable(), st);
2360 st->cr();
2361 }
2362 }
2363 }
2364 }
2365 }
2366
2367 /**
2368 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2369 */
2370 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2371 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2372 JavaValue result(T_VOID);
2373 JavaCalls::call_virtual(&result,
2374 throwable,
2375 SystemDictionary::Throwable_klass(),
2376 vmSymbols::printStackTrace_name(),
2377 vmSymbols::void_method_signature(),
2378 THREAD);
2379 }
2380
2381 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2382 if (!StackTraceInThrowable) return;
2383 ResourceMark rm(THREAD);
2384
2385 // Start out by clearing the backtrace for this object, in case the VM
2386 // runs out of memory while allocating the stack trace
2387 set_backtrace(throwable(), NULL);
2388 // Clear lazily constructed Java level stacktrace if refilling occurs
2389 // This is unnecessary in 1.7+ but harmless
2390 clear_stacktrace(throwable());
2391
2392 int max_depth = MaxJavaStackTraceDepth;
2393 JavaThread* thread = (JavaThread*)THREAD;
2394
2395 BacktraceBuilder bt(CHECK);
2396
2397 // If there is no Java frame just return the method that was being called
2398 // with bci 0
2399 if (!thread->has_last_Java_frame()) {
2400 if (max_depth >= 1 && method() != NULL) {
2401 bt.push(method(), 0, CHECK);
2402 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2403 set_depth(throwable(), 1);
2404 set_backtrace(throwable(), bt.backtrace());
2405 }
2406 return;
2407 }
2408
2409 // Instead of using vframe directly, this version of fill_in_stack_trace
2410 // basically handles everything by hand. This significantly improved the
2411 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2412 // See bug 6333838 for more details.
2413 // The "ASSERT" here is to verify this method generates the exactly same stack
2414 // trace as utilizing vframe.
2415 #ifdef ASSERT
2416 vframeStream st(thread);
2417 #endif
2418 int total_count = 0;
2419 RegisterMap map(thread, false);
2420 int decode_offset = 0;
2421 CompiledMethod* nm = NULL;
2422 bool skip_fillInStackTrace_check = false;
2423 bool skip_throwableInit_check = false;
2424 bool skip_hidden = !ShowHiddenFrames;
2425
2426 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2427 Method* method = NULL;
2428 int bci = 0;
2429
2430 // Compiled java method case.
2431 if (decode_offset != 0) {
2432 DebugInfoReadStream stream(nm, decode_offset);
2433 decode_offset = stream.read_int();
2434 method = (Method*)nm->metadata_at(stream.read_int());
2435 bci = stream.read_bci();
2436 } else {
2437 if (fr.is_first_frame()) break;
2438 address pc = fr.pc();
2439 if (fr.is_interpreted_frame()) {
2440 address bcp = fr.interpreter_frame_bcp();
2441 method = fr.interpreter_frame_method();
2442 bci = method->bci_from(bcp);
2443 fr = fr.sender(&map);
2444 } else {
2445 CodeBlob* cb = fr.cb();
2446 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2447 // but non nmethod
2448 fr = fr.sender(&map);
2449 if (cb == NULL || !cb->is_compiled()) {
2450 continue;
2451 }
2452 nm = cb->as_compiled_method();
2453 if (nm->method()->is_native()) {
2454 method = nm->method();
2455 bci = 0;
2456 } else {
2457 PcDesc* pd = nm->pc_desc_at(pc);
2458 decode_offset = pd->scope_decode_offset();
2459 // if decode_offset is not equal to 0, it will execute the
2460 // "compiled java method case" at the beginning of the loop.
2461 continue;
2462 }
2463 }
2464 }
2465 #ifdef ASSERT
2466 assert(st.method() == method && st.bci() == bci,
2467 "Wrong stack trace");
2468 st.next();
2469 #endif
2470
2471 // the format of the stacktrace will be:
2472 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2473 // - 0 or more <init> methods for the exception class (skipped)
2474 // - rest of the stack
2475
2476 if (!skip_fillInStackTrace_check) {
2477 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2478 throwable->is_a(method->method_holder())) {
2479 continue;
2480 }
2481 else {
2482 skip_fillInStackTrace_check = true; // gone past them all
2483 }
2484 }
2485 if (!skip_throwableInit_check) {
2486 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2487
2488 // skip <init> methods of the exception class and superclasses
2489 // This is simlar to classic VM.
2490 if (method->name() == vmSymbols::object_initializer_name() &&
2491 throwable->is_a(method->method_holder())) {
2492 continue;
2493 } else {
2494 // there are none or we've seen them all - either way stop checking
2495 skip_throwableInit_check = true;
2496 }
2497 }
2498 if (method->is_hidden()) {
2499 if (skip_hidden) {
2500 if (total_count == 0) {
2501 // The top frame will be hidden from the stack trace.
2502 bt.set_has_hidden_top_frame(CHECK);
2503 }
2504 continue;
2505 }
2506 }
2507 bt.push(method, bci, CHECK);
2508 total_count++;
2509 }
2510
2511 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2512
2513 // Put completed stack trace into throwable object
2514 set_backtrace(throwable(), bt.backtrace());
2515 set_depth(throwable(), total_count);
2516 }
2517
2518 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2519 // No-op if stack trace is disabled
2520 if (!StackTraceInThrowable) {
2521 return;
2522 }
2523
2524 // Disable stack traces for some preallocated out of memory errors
2525 if (!Universe::should_fill_in_stack_trace(throwable)) {
2526 return;
2527 }
2528
2529 PRESERVE_EXCEPTION_MARK;
2530
2531 JavaThread* thread = JavaThread::active();
2532 fill_in_stack_trace(throwable, method, thread);
2533 // ignore exceptions thrown during stack trace filling
2534 CLEAR_PENDING_EXCEPTION;
2535 }
2536
2537 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2538 // Allocate stack trace - backtrace is created but not filled in
2539
2540 // No-op if stack trace is disabled
2541 if (!StackTraceInThrowable) return;
2542 BacktraceBuilder bt(CHECK); // creates a backtrace
2543 set_backtrace(throwable(), bt.backtrace());
2544 }
2545
2546
2547 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2548 // Fill in stack trace into preallocated backtrace (no GC)
2549
2550 // No-op if stack trace is disabled
2551 if (!StackTraceInThrowable) return;
2552
2553 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2554
2555 JavaThread* THREAD = JavaThread::current();
2556
2557 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2558 assert(backtrace.not_null(), "backtrace should have been preallocated");
2559
2560 ResourceMark rm(THREAD);
2561 vframeStream st(THREAD);
2562
2563 BacktraceBuilder bt(THREAD, backtrace);
2564
2565 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2566 // methods as preallocated errors aren't created by "java" code.
2567
2568 // fill in as much stack trace as possible
2569 int chunk_count = 0;
2570 for (;!st.at_end(); st.next()) {
2571 bt.push(st.method(), st.bci(), CHECK);
2572 chunk_count++;
2573
2574 // Bail-out for deep stacks
2575 if (chunk_count >= trace_chunk_size) break;
2576 }
2577 set_depth(throwable(), chunk_count);
2578 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2579
2580 // We support the Throwable immutability protocol defined for Java 7.
2581 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2582 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2583 }
2584
2585 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2586 objArrayHandle stack_trace_array_h, TRAPS) {
2587
2588 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2589 THROW(vmSymbols::java_lang_NullPointerException());
2590 }
2591
2592 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2593
2594 if (stack_trace_array_h->length() != depth(throwable())) {
2595 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2596 }
2597
2598 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2599 BacktraceIterator iter(result, THREAD);
2600
2601 int index = 0;
2602 while (iter.repeat()) {
2603 BacktraceElement bte = iter.next(THREAD);
2604
2605 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2606
2607 if (stack_trace_element.is_null()) {
2608 THROW(vmSymbols::java_lang_NullPointerException());
2609 }
2610
2611 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2612 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2613
2614 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2615 method,
2616 bte._version,
2617 bte._bci,
2618 bte._name, CHECK);
2619 }
2620 }
2621
2622 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2623 Thread* THREAD = Thread::current();
2624 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable)));
2625 BacktraceIterator iter(result, THREAD);
2626 // No backtrace available.
2627 if (!iter.repeat()) return false;
2628
2629 // If the exception happened in a frame that has been hidden, i.e.,
2630 // omitted from the back trace, we can not compute the message.
2631 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2632 if (hidden != NULL) {
2633 return false;
2634 }
2635
2636 // Get first backtrace element.
2637 BacktraceElement bte = iter.next(THREAD);
2638
2639 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2640 assert(holder != NULL, "first element should be non-null");
2641 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2642
2643 // Original version is no longer available.
2644 if (m == NULL || !version_matches(m, bte._version)) {
2645 return false;
2646 }
2647
2648 *method = m;
2649 *bci = bte._bci;
2650 return true;
2651 }
2652
2653 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2654 // Allocate java.lang.StackTraceElement instance
2655 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2656 assert(k != NULL, "must be loaded in 1.4+");
2657 if (k->should_be_initialized()) {
2658 k->initialize(CHECK_0);
2659 }
2660
2661 Handle element = k->allocate_instance_handle(CHECK_0);
2662
2663 int version = method->constants()->version();
2664 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2665 return element();
2666 }
2667
2668 void java_lang_StackTraceElement::fill_in(Handle element,
2669 InstanceKlass* holder, const methodHandle& method,
2670 int version, int bci, Symbol* name, TRAPS) {
2671 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2672
2673 ResourceMark rm(THREAD);
2674 HandleMark hm(THREAD);
2675
2676 // Fill in class name
2677 Handle java_class(THREAD, holder->java_mirror());
2678 oop classname = java_lang_Class::name(java_class, CHECK);
2679 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2680 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2681
2682 oop loader = holder->class_loader();
2683 if (loader != NULL) {
2684 oop loader_name = java_lang_ClassLoader::name(loader);
2685 if (loader_name != NULL)
2686 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2687 }
2688
2689 // Fill in method name
2690 oop methodname = StringTable::intern(name, CHECK);
2691 java_lang_StackTraceElement::set_methodName(element(), methodname);
2692
2693 // Fill in module name and version
2694 ModuleEntry* module = holder->module();
2695 if (module->is_named()) {
2696 oop module_name = StringTable::intern(module->name(), CHECK);
2697 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2698 oop module_version;
2699 if (module->version() != NULL) {
2700 module_version = StringTable::intern(module->version(), CHECK);
2701 } else {
2702 module_version = NULL;
2703 }
2704 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2705 }
2706
2707 if (method() == NULL || !version_matches(method(), version)) {
2708 // The method was redefined, accurate line number information isn't available
2709 java_lang_StackTraceElement::set_fileName(element(), NULL);
2710 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2711 } else {
2712 Symbol* source;
2713 oop source_file;
2714 int line_number;
2715 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2716
2717 java_lang_StackTraceElement::set_fileName(element(), source_file);
2718 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2719 }
2720 }
2721
2722 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2723 InstanceKlass* holder,
2724 int version,
2725 const methodHandle& method,
2726 int bci,
2727 Symbol*& source,
2728 oop& source_file,
2729 int& line_number, TRAPS) {
2730 // Fill in source file name and line number.
2731 source = Backtrace::get_source_file_name(holder, version);
2732 source_file = java_lang_Class::source_file(java_class());
2733 if (source != NULL) {
2734 // Class was not redefined. We can trust its cache if set,
2735 // else we have to initialize it.
2736 if (source_file == NULL) {
2737 source_file = StringTable::intern(source, CHECK);
2738 java_lang_Class::set_source_file(java_class(), source_file);
2739 }
2740 } else {
2741 // Class was redefined. Dump the cache if it was set.
2742 if (source_file != NULL) {
2743 source_file = NULL;
2744 java_lang_Class::set_source_file(java_class(), source_file);
2745 }
2746 }
2747 line_number = Backtrace::get_line_number(method(), bci);
2748 }
2749
2750 #if INCLUDE_JVMCI
2751 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
2752 Symbol*& filename, int& line_number, TRAPS) {
2753 ResourceMark rm(THREAD);
2754 HandleMark hm(THREAD);
2755
2756 filename = NULL;
2757 line_number = -1;
2758
2759 oop source_file;
2760 int version = method->constants()->version();
2761 InstanceKlass* holder = method->method_holder();
2762 Handle java_class(THREAD, holder->java_mirror());
2763 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
2764 }
2765 #endif // INCLUDE_JVMCI
2766
2767 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2768 HandleMark hm(THREAD);
2769 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2770 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2771 // we should expand MemberName::name when Throwable uses StackTrace
2772 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2773 return method;
2774 }
2775
2776 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2777 // set Method* or mid/cpref
2778 HandleMark hm(THREAD);
2779 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2780 InstanceKlass* ik = method->method_holder();
2781 CallInfo info(method(), ik, CHECK);
2782 MethodHandles::init_method_MemberName(mname, info);
2783 // set bci
2784 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2785 // method may be redefined; store the version
2786 int version = method->constants()->version();
2787 assert((jushort)version == version, "version should be short");
2788 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2789 }
2790
2791 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2792 ResourceMark rm(THREAD);
2793 HandleMark hm(THREAD);
2794 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2795 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2796 InstanceKlass* holder = InstanceKlass::cast(clazz);
2797 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2798
2799 short version = stackFrame->short_field(_version_offset);
2800 int bci = stackFrame->int_field(_bci_offset);
2801 Symbol* name = method->name();
2802 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method),
2803 version, bci, name, CHECK);
2804 }
2805
2806 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2807 macro(_memberName_offset, k, "memberName", object_signature, false); \
2808 macro(_bci_offset, k, "bci", int_signature, false)
2809
2810 void java_lang_StackFrameInfo::compute_offsets() {
2811 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2812 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2813 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2814 }
2815
2816 #if INCLUDE_CDS
2817 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2818 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2819 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2820 }
2821 #endif
2822
2823 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2824 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2825 macro(_locals_offset, k, "locals", object_array_signature, false); \
2826 macro(_operands_offset, k, "operands", object_array_signature, false); \
2827 macro(_mode_offset, k, "mode", int_signature, false)
2828
2829 void java_lang_LiveStackFrameInfo::compute_offsets() {
2830 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2831 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2832 }
2833
2834 #if INCLUDE_CDS
2835 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2836 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2837 }
2838 #endif
2839
2840 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2841 macro(override_offset, k, "override", bool_signature, false)
2842
2843 void java_lang_reflect_AccessibleObject::compute_offsets() {
2844 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2845 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2846 }
2847
2848 #if INCLUDE_CDS
2849 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2850 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2851 }
2852 #endif
2853
2854 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2855 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2856 return (jboolean) reflect->bool_field(override_offset);
2857 }
2858
2859 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2860 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2861 reflect->bool_field_put(override_offset, (int) value);
2862 }
2863
2864 #define METHOD_FIELDS_DO(macro) \
2865 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2866 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2867 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2868 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2869 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2870 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2871 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2872 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2873 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2874 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2875 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2876
2877 void java_lang_reflect_Method::compute_offsets() {
2878 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2879 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2880 }
2881
2882 #if INCLUDE_CDS
2883 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2884 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2885 }
2886 #endif
2887
2888 Handle java_lang_reflect_Method::create(TRAPS) {
2889 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2890 Klass* klass = SystemDictionary::reflect_Method_klass();
2891 // This class is eagerly initialized during VM initialization, since we keep a refence
2892 // to one of the methods
2893 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2894 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2895 }
2896
2897 oop java_lang_reflect_Method::clazz(oop reflect) {
2898 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2899 return reflect->obj_field(clazz_offset);
2900 }
2901
2902 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2903 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2904 reflect->obj_field_put(clazz_offset, value);
2905 }
2906
2907 int java_lang_reflect_Method::slot(oop reflect) {
2908 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2909 return reflect->int_field(slot_offset);
2910 }
2911
2912 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2913 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2914 reflect->int_field_put(slot_offset, value);
2915 }
2916
2917 void java_lang_reflect_Method::set_name(oop method, oop value) {
2918 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2919 method->obj_field_put(name_offset, value);
2920 }
2921
2922 oop java_lang_reflect_Method::return_type(oop method) {
2923 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2924 return method->obj_field(returnType_offset);
2925 }
2926
2927 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2928 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2929 method->obj_field_put(returnType_offset, value);
2930 }
2931
2932 oop java_lang_reflect_Method::parameter_types(oop method) {
2933 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2934 return method->obj_field(parameterTypes_offset);
2935 }
2936
2937 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2938 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2939 method->obj_field_put(parameterTypes_offset, value);
2940 }
2941
2942 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2943 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2944 method->obj_field_put(exceptionTypes_offset, value);
2945 }
2946
2947 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2948 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2949 method->int_field_put(modifiers_offset, value);
2950 }
2951
2952 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2953 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2954 method->obj_field_put(signature_offset, value);
2955 }
2956
2957 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2958 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2959 method->obj_field_put(annotations_offset, value);
2960 }
2961
2962 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2963 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2964 method->obj_field_put(parameter_annotations_offset, value);
2965 }
2966
2967 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2969 method->obj_field_put(annotation_default_offset, value);
2970 }
2971
2972 #define CONSTRUCTOR_FIELDS_DO(macro) \
2973 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2974 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2975 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2976 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2977 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2978 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2979 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2980 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2981
2982 void java_lang_reflect_Constructor::compute_offsets() {
2983 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2984 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2985 }
2986
2987 #if INCLUDE_CDS
2988 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2989 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2990 }
2991 #endif
2992
2993 Handle java_lang_reflect_Constructor::create(TRAPS) {
2994 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2995 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2996 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2997 InstanceKlass* ik = InstanceKlass::cast(k);
2998 // Ensure it is initialized
2999 ik->initialize(CHECK_NH);
3000 return ik->allocate_instance_handle(THREAD);
3001 }
3002
3003 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3004 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3005 return reflect->obj_field(clazz_offset);
3006 }
3007
3008 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3009 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3010 reflect->obj_field_put(clazz_offset, value);
3011 }
3012
3013 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3014 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3015 return constructor->obj_field(parameterTypes_offset);
3016 }
3017
3018 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3019 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3020 constructor->obj_field_put(parameterTypes_offset, value);
3021 }
3022
3023 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3024 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3025 constructor->obj_field_put(exceptionTypes_offset, value);
3026 }
3027
3028 int java_lang_reflect_Constructor::slot(oop reflect) {
3029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3030 return reflect->int_field(slot_offset);
3031 }
3032
3033 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3034 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3035 reflect->int_field_put(slot_offset, value);
3036 }
3037
3038 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3039 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3040 constructor->int_field_put(modifiers_offset, value);
3041 }
3042
3043 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3044 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3045 constructor->obj_field_put(signature_offset, value);
3046 }
3047
3048 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3049 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3050 constructor->obj_field_put(annotations_offset, value);
3051 }
3052
3053 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3054 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3055 method->obj_field_put(parameter_annotations_offset, value);
3056 }
3057
3058 #define FIELD_FIELDS_DO(macro) \
3059 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3060 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3061 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3062 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3063 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3064 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3065 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3066
3067 void java_lang_reflect_Field::compute_offsets() {
3068 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3069 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3070 }
3071
3072 #if INCLUDE_CDS
3073 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3074 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3075 }
3076 #endif
3077
3078 Handle java_lang_reflect_Field::create(TRAPS) {
3079 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3080 Symbol* name = vmSymbols::java_lang_reflect_Field();
3081 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3082 InstanceKlass* ik = InstanceKlass::cast(k);
3083 // Ensure it is initialized
3084 ik->initialize(CHECK_NH);
3085 return ik->allocate_instance_handle(THREAD);
3086 }
3087
3088 oop java_lang_reflect_Field::clazz(oop reflect) {
3089 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3090 return reflect->obj_field(clazz_offset);
3091 }
3092
3093 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3094 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3095 reflect->obj_field_put(clazz_offset, value);
3096 }
3097
3098 oop java_lang_reflect_Field::name(oop field) {
3099 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3100 return field->obj_field(name_offset);
3101 }
3102
3103 void java_lang_reflect_Field::set_name(oop field, oop value) {
3104 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3105 field->obj_field_put(name_offset, value);
3106 }
3107
3108 oop java_lang_reflect_Field::type(oop field) {
3109 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3110 return field->obj_field(type_offset);
3111 }
3112
3113 void java_lang_reflect_Field::set_type(oop field, oop value) {
3114 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3115 field->obj_field_put(type_offset, value);
3116 }
3117
3118 int java_lang_reflect_Field::slot(oop reflect) {
3119 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3120 return reflect->int_field(slot_offset);
3121 }
3122
3123 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3124 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3125 reflect->int_field_put(slot_offset, value);
3126 }
3127
3128 int java_lang_reflect_Field::modifiers(oop field) {
3129 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3130 return field->int_field(modifiers_offset);
3131 }
3132
3133 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3134 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3135 field->int_field_put(modifiers_offset, value);
3136 }
3137
3138 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3139 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3140 field->obj_field_put(signature_offset, value);
3141 }
3142
3143 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3144 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3145 field->obj_field_put(annotations_offset, value);
3146 }
3147
3148 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3149 // Allocate java.lang.reflect.RecordComponent instance
3150 HandleMark hm(THREAD);
3151 InstanceKlass* ik = SystemDictionary::RecordComponent_klass();
3152 assert(ik != NULL, "must be loaded");
3153 ik->initialize(CHECK_NULL);
3154
3155 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3156
3157 Handle decl_class(THREAD, holder->java_mirror());
3158 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3159
3160 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3161 oop component_name = StringTable::intern(name, CHECK_NULL);
3162 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3163
3164 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3165 Handle component_type_h =
3166 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3167 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3168
3169 Method* accessor_method = NULL;
3170 {
3171 // Prepend "()" to type to create the full method signature.
3172 ResourceMark rm(THREAD);
3173 int sig_len = type->utf8_length() + 3; // "()" and null char
3174 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3175 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3176 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3177 accessor_method = holder->find_instance_method(name, full_sig);
3178 }
3179
3180 if (accessor_method != NULL) {
3181 methodHandle method(THREAD, accessor_method);
3182 oop m = Reflection::new_method(method, false, CHECK_NULL);
3183 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3184 } else {
3185 java_lang_reflect_RecordComponent::set_accessor(element(), NULL);
3186 }
3187
3188 int sig_index = component->generic_signature_index();
3189 if (sig_index > 0) {
3190 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3191 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3192 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3193 } else {
3194 java_lang_reflect_RecordComponent::set_signature(element(), NULL);
3195 }
3196
3197 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3198 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3199
3200 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3201 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3202
3203 return element();
3204 }
3205
3206 #define CONSTANTPOOL_FIELDS_DO(macro) \
3207 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3208
3209 void reflect_ConstantPool::compute_offsets() {
3210 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3211 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3212 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3213 }
3214
3215 #if INCLUDE_CDS
3216 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3217 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3218 }
3219 #endif
3220
3221 #define PARAMETER_FIELDS_DO(macro) \
3222 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3223 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3224 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3225 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3226
3227 void java_lang_reflect_Parameter::compute_offsets() {
3228 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3229 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3230 }
3231
3232 #if INCLUDE_CDS
3233 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3234 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3235 }
3236 #endif
3237
3238 Handle java_lang_reflect_Parameter::create(TRAPS) {
3239 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3240 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3241 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3242 InstanceKlass* ik = InstanceKlass::cast(k);
3243 // Ensure it is initialized
3244 ik->initialize(CHECK_NH);
3245 return ik->allocate_instance_handle(THREAD);
3246 }
3247
3248 oop java_lang_reflect_Parameter::name(oop param) {
3249 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3250 return param->obj_field(name_offset);
3251 }
3252
3253 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3254 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3255 param->obj_field_put(name_offset, value);
3256 }
3257
3258 int java_lang_reflect_Parameter::modifiers(oop param) {
3259 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3260 return param->int_field(modifiers_offset);
3261 }
3262
3263 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3264 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3265 param->int_field_put(modifiers_offset, value);
3266 }
3267
3268 int java_lang_reflect_Parameter::index(oop param) {
3269 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3270 return param->int_field(index_offset);
3271 }
3272
3273 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3274 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3275 param->int_field_put(index_offset, value);
3276 }
3277
3278 oop java_lang_reflect_Parameter::executable(oop param) {
3279 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3280 return param->obj_field(executable_offset);
3281 }
3282
3283 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3284 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3285 param->obj_field_put(executable_offset, value);
3286 }
3287
3288
3289 int java_lang_Module::loader_offset;
3290 int java_lang_Module::name_offset;
3291 int java_lang_Module::_module_entry_offset = -1;
3292
3293 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3294 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3295 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3296 vmSymbols::java_lang_module_init_signature(),
3297 loader, module_name, CHECK_NH);
3298 }
3299
3300 #define MODULE_FIELDS_DO(macro) \
3301 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3302 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3303
3304 void java_lang_Module::compute_offsets() {
3305 InstanceKlass* k = SystemDictionary::Module_klass();
3306 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3307 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3308 }
3309
3310 #if INCLUDE_CDS
3311 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3312 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3313 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3314 }
3315 #endif
3316
3317 oop java_lang_Module::loader(oop module) {
3318 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3319 return module->obj_field(loader_offset);
3320 }
3321
3322 void java_lang_Module::set_loader(oop module, oop value) {
3323 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3324 module->obj_field_put(loader_offset, value);
3325 }
3326
3327 oop java_lang_Module::name(oop module) {
3328 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3329 return module->obj_field(name_offset);
3330 }
3331
3332 void java_lang_Module::set_name(oop module, oop value) {
3333 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3334 module->obj_field_put(name_offset, value);
3335 }
3336
3337 ModuleEntry* java_lang_Module::module_entry(oop module) {
3338 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3339 assert(module != NULL, "module can't be null");
3340 assert(oopDesc::is_oop(module), "module must be oop");
3341
3342 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3343 if (module_entry == NULL) {
3344 // If the inject field containing the ModuleEntry* is null then return the
3345 // class loader's unnamed module.
3346 oop loader = java_lang_Module::loader(module);
3347 Handle h_loader = Handle(Thread::current(), loader);
3348 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3349 return loader_cld->unnamed_module();
3350 }
3351 return module_entry;
3352 }
3353
3354 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3355 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3356 assert(module != NULL, "module can't be null");
3357 assert(oopDesc::is_oop(module), "module must be oop");
3358 module->address_field_put(_module_entry_offset, (address)module_entry);
3359 }
3360
3361 Handle reflect_ConstantPool::create(TRAPS) {
3362 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3363 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3364 // Ensure it is initialized
3365 k->initialize(CHECK_NH);
3366 return k->allocate_instance_handle(THREAD);
3367 }
3368
3369
3370 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3371 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3372 oop mirror = value->pool_holder()->java_mirror();
3373 // Save the mirror to get back the constant pool.
3374 reflect->obj_field_put(_oop_offset, mirror);
3375 }
3376
3377 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3378 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3379
3380 oop mirror = reflect->obj_field(_oop_offset);
3381 Klass* k = java_lang_Class::as_Klass(mirror);
3382 assert(k->is_instance_klass(), "Must be");
3383
3384 // Get the constant pool back from the klass. Since class redefinition
3385 // merges the new constant pool into the old, this is essentially the
3386 // same constant pool as the original. If constant pool merging is
3387 // no longer done in the future, this will have to change to save
3388 // the original.
3389 return InstanceKlass::cast(k)->constants();
3390 }
3391
3392 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3393 macro(_base_offset, k, "base", object_signature, false)
3394
3395 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3396 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3397 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3398 }
3399
3400 #if INCLUDE_CDS
3401 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3402 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3403 }
3404 #endif
3405
3406 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3407 Klass* k = SystemDictionary::box_klass(type);
3408 if (k == NULL) return NULL;
3409 InstanceKlass* ik = InstanceKlass::cast(k);
3410 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3411 return ik->allocate_instance(THREAD);
3412 }
3413
3414
3415 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3416 oop box = initialize_and_allocate(type, CHECK_0);
3417 if (box == NULL) return NULL;
3418 switch (type) {
3419 case T_BOOLEAN:
3420 box->bool_field_put(value_offset, value->z);
3421 break;
3422 case T_CHAR:
3423 box->char_field_put(value_offset, value->c);
3424 break;
3425 case T_FLOAT:
3426 box->float_field_put(value_offset, value->f);
3427 break;
3428 case T_DOUBLE:
3429 box->double_field_put(long_value_offset, value->d);
3430 break;
3431 case T_BYTE:
3432 box->byte_field_put(value_offset, value->b);
3433 break;
3434 case T_SHORT:
3435 box->short_field_put(value_offset, value->s);
3436 break;
3437 case T_INT:
3438 box->int_field_put(value_offset, value->i);
3439 break;
3440 case T_LONG:
3441 box->long_field_put(long_value_offset, value->j);
3442 break;
3443 default:
3444 return NULL;
3445 }
3446 return box;
3447 }
3448
3449
3450 BasicType java_lang_boxing_object::basic_type(oop box) {
3451 if (box == NULL) return T_ILLEGAL;
3452 BasicType type = SystemDictionary::box_klass_type(box->klass());
3453 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3454 return T_ILLEGAL;
3455 return type;
3456 }
3457
3458
3459 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3460 BasicType type = SystemDictionary::box_klass_type(box->klass());
3461 switch (type) {
3462 case T_BOOLEAN:
3463 value->z = box->bool_field(value_offset);
3464 break;
3465 case T_CHAR:
3466 value->c = box->char_field(value_offset);
3467 break;
3468 case T_FLOAT:
3469 value->f = box->float_field(value_offset);
3470 break;
3471 case T_DOUBLE:
3472 value->d = box->double_field(long_value_offset);
3473 break;
3474 case T_BYTE:
3475 value->b = box->byte_field(value_offset);
3476 break;
3477 case T_SHORT:
3478 value->s = box->short_field(value_offset);
3479 break;
3480 case T_INT:
3481 value->i = box->int_field(value_offset);
3482 break;
3483 case T_LONG:
3484 value->j = box->long_field(long_value_offset);
3485 break;
3486 default:
3487 return T_ILLEGAL;
3488 } // end switch
3489 return type;
3490 }
3491
3492
3493 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3494 BasicType type = SystemDictionary::box_klass_type(box->klass());
3495 switch (type) {
3496 case T_BOOLEAN:
3497 box->bool_field_put(value_offset, value->z);
3498 break;
3499 case T_CHAR:
3500 box->char_field_put(value_offset, value->c);
3501 break;
3502 case T_FLOAT:
3503 box->float_field_put(value_offset, value->f);
3504 break;
3505 case T_DOUBLE:
3506 box->double_field_put(long_value_offset, value->d);
3507 break;
3508 case T_BYTE:
3509 box->byte_field_put(value_offset, value->b);
3510 break;
3511 case T_SHORT:
3512 box->short_field_put(value_offset, value->s);
3513 break;
3514 case T_INT:
3515 box->int_field_put(value_offset, value->i);
3516 break;
3517 case T_LONG:
3518 box->long_field_put(long_value_offset, value->j);
3519 break;
3520 default:
3521 return T_ILLEGAL;
3522 } // end switch
3523 return type;
3524 }
3525
3526
3527 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3528 switch (type) {
3529 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3530 case T_CHAR: st->print("%d", value->c); break;
3531 case T_BYTE: st->print("%d", value->b); break;
3532 case T_SHORT: st->print("%d", value->s); break;
3533 case T_INT: st->print("%d", value->i); break;
3534 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3535 case T_FLOAT: st->print("%f", value->f); break;
3536 case T_DOUBLE: st->print("%lf", value->d); break;
3537 default: st->print("type %d?", type); break;
3538 }
3539 }
3540
3541 // Support for java_lang_ref_Reference
3542
3543 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3544 assert(obj != NULL, "sanity");
3545 if (offset != java_lang_ref_Reference::referent_offset) {
3546 return false;
3547 }
3548
3549 Klass* k = obj->klass();
3550 if (!k->is_instance_klass()) {
3551 return false;
3552 }
3553
3554 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3555 bool is_reference = ik->reference_type() != REF_NONE;
3556 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3557 return is_reference;
3558 }
3559
3560 // Support for java_lang_ref_SoftReference
3561 //
3562
3563 #define SOFTREFERENCE_FIELDS_DO(macro) \
3564 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3565 macro(static_clock_offset, k, "clock", long_signature, true)
3566
3567 void java_lang_ref_SoftReference::compute_offsets() {
3568 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3569 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3570 }
3571
3572 #if INCLUDE_CDS
3573 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3574 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3575 }
3576 #endif
3577
3578 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3579 return ref->long_field(timestamp_offset);
3580 }
3581
3582 jlong java_lang_ref_SoftReference::clock() {
3583 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3584 oop base = ik->static_field_base_raw();
3585 return base->long_field(static_clock_offset);
3586 }
3587
3588 void java_lang_ref_SoftReference::set_clock(jlong value) {
3589 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3590 oop base = ik->static_field_base_raw();
3591 base->long_field_put(static_clock_offset, value);
3592 }
3593
3594 // Support for java_lang_invoke_DirectMethodHandle
3595
3596 int java_lang_invoke_DirectMethodHandle::_member_offset;
3597
3598 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3599 oop member_name = NULL;
3600 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3601 "a DirectMethodHandle oop is expected");
3602 return dmh->obj_field(member_offset_in_bytes());
3603 }
3604
3605 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3606 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3607
3608 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3609 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3610 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3611 }
3612
3613 #if INCLUDE_CDS
3614 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3615 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3616 }
3617 #endif
3618
3619 // Support for java_lang_invoke_MethodHandle
3620
3621 int java_lang_invoke_MethodHandle::_type_offset;
3622 int java_lang_invoke_MethodHandle::_form_offset;
3623
3624 int java_lang_invoke_MemberName::_clazz_offset;
3625 int java_lang_invoke_MemberName::_name_offset;
3626 int java_lang_invoke_MemberName::_type_offset;
3627 int java_lang_invoke_MemberName::_flags_offset;
3628 int java_lang_invoke_MemberName::_method_offset;
3629 int java_lang_invoke_MemberName::_vmindex_offset;
3630
3631 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3632 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3633
3634 int java_lang_invoke_LambdaForm::_vmentry_offset;
3635
3636 #define METHODHANDLE_FIELDS_DO(macro) \
3637 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3638 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3639
3640 void java_lang_invoke_MethodHandle::compute_offsets() {
3641 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3642 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3643 }
3644
3645 #if INCLUDE_CDS
3646 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3647 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3648 }
3649 #endif
3650
3651 #define MEMBERNAME_FIELDS_DO(macro) \
3652 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3653 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3654 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3655 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3656 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3657
3658 void java_lang_invoke_MemberName::compute_offsets() {
3659 InstanceKlass* k = SystemDictionary::MemberName_klass();
3660 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3661 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3662 }
3663
3664 #if INCLUDE_CDS
3665 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3666 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3667 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3668 }
3669 #endif
3670
3671 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3672 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3673 assert(k != NULL, "jdk mismatch");
3674 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3675 }
3676
3677 #if INCLUDE_CDS
3678 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3679 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3680 }
3681 #endif
3682
3683 #define LAMBDAFORM_FIELDS_DO(macro) \
3684 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3685
3686 void java_lang_invoke_LambdaForm::compute_offsets() {
3687 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3688 assert (k != NULL, "jdk mismatch");
3689 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3690 }
3691
3692 #if INCLUDE_CDS
3693 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3694 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3695 }
3696 #endif
3697
3698 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3699 return obj != NULL && is_subclass(obj->klass());
3700 }
3701
3702
3703 oop java_lang_invoke_MethodHandle::type(oop mh) {
3704 return mh->obj_field(_type_offset);
3705 }
3706
3707 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3708 mh->obj_field_put(_type_offset, mtype);
3709 }
3710
3711 oop java_lang_invoke_MethodHandle::form(oop mh) {
3712 assert(_form_offset != 0, "");
3713 return mh->obj_field(_form_offset);
3714 }
3715
3716 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3717 assert(_form_offset != 0, "");
3718 mh->obj_field_put(_form_offset, lform);
3719 }
3720
3721 /// MemberName accessors
3722
3723 oop java_lang_invoke_MemberName::clazz(oop mname) {
3724 assert(is_instance(mname), "wrong type");
3725 return mname->obj_field(_clazz_offset);
3726 }
3727
3728 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3729 assert(is_instance(mname), "wrong type");
3730 mname->obj_field_put(_clazz_offset, clazz);
3731 }
3732
3733 oop java_lang_invoke_MemberName::name(oop mname) {
3734 assert(is_instance(mname), "wrong type");
3735 return mname->obj_field(_name_offset);
3736 }
3737
3738 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3739 assert(is_instance(mname), "wrong type");
3740 mname->obj_field_put(_name_offset, name);
3741 }
3742
3743 oop java_lang_invoke_MemberName::type(oop mname) {
3744 assert(is_instance(mname), "wrong type");
3745 return mname->obj_field(_type_offset);
3746 }
3747
3748 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3749 assert(is_instance(mname), "wrong type");
3750 mname->obj_field_put(_type_offset, type);
3751 }
3752
3753 int java_lang_invoke_MemberName::flags(oop mname) {
3754 assert(is_instance(mname), "wrong type");
3755 return mname->int_field(_flags_offset);
3756 }
3757
3758 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3759 assert(is_instance(mname), "wrong type");
3760 mname->int_field_put(_flags_offset, flags);
3761 }
3762
3763
3764 // Return vmtarget from ResolvedMethodName method field through indirection
3765 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3766 assert(is_instance(mname), "wrong type");
3767 oop method = mname->obj_field(_method_offset);
3768 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3769 }
3770
3771 bool java_lang_invoke_MemberName::is_method(oop mname) {
3772 assert(is_instance(mname), "must be MemberName");
3773 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3774 }
3775
3776 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3777 assert(is_instance(mname), "wrong type");
3778 mname->obj_field_put(_method_offset, resolved_method);
3779 }
3780
3781 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3782 assert(is_instance(mname), "wrong type");
3783 return (intptr_t) mname->address_field(_vmindex_offset);
3784 }
3785
3786 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3787 assert(is_instance(mname), "wrong type");
3788 mname->address_field_put(_vmindex_offset, (address) index);
3789 }
3790
3791
3792 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3793 assert(is_instance(resolved_method), "wrong type");
3794 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3795 assert(m->is_method(), "must be");
3796 return m;
3797 }
3798
3799 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3800 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3801 assert(is_instance(resolved_method), "wrong type");
3802 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3803 }
3804
3805 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
3806 assert(is_instance(resolved_method), "wrong type");
3807 resolved_method->obj_field_put(_vmholder_offset, holder);
3808 }
3809
3810 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3811 const Method* method = m();
3812
3813 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3814 oop resolved_method = ResolvedMethodTable::find_method(method);
3815 if (resolved_method != NULL) {
3816 return resolved_method;
3817 }
3818
3819 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3820 if (!k->is_initialized()) {
3821 k->initialize(CHECK_NULL);
3822 }
3823
3824 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3825
3826 NoSafepointVerifier nsv;
3827
3828 if (method->is_old()) {
3829 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
3830 method->get_new_method();
3831 }
3832
3833 InstanceKlass* holder = method->method_holder();
3834
3835 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
3836 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3837 // distinct loaders) to ensure the metadata is kept alive.
3838 // This mirror may be different than the one in clazz field.
3839 set_vmholder(new_resolved_method, holder->java_mirror());
3840
3841 // Set flag in class to indicate this InstanceKlass has entries in the table
3842 // to avoid walking table during redefinition if none of the redefined classes
3843 // have any membernames in the table.
3844 holder->set_has_resolved_methods();
3845
3846 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
3847 }
3848
3849 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3850 assert(is_instance(lform), "wrong type");
3851 return lform->obj_field(_vmentry_offset);
3852 }
3853
3854
3855 // Support for java_lang_invoke_MethodType
3856
3857 int java_lang_invoke_MethodType::_rtype_offset;
3858 int java_lang_invoke_MethodType::_ptypes_offset;
3859
3860 #define METHODTYPE_FIELDS_DO(macro) \
3861 macro(_rtype_offset, k, "rtype", class_signature, false); \
3862 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3863
3864 void java_lang_invoke_MethodType::compute_offsets() {
3865 InstanceKlass* k = SystemDictionary::MethodType_klass();
3866 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3867 }
3868
3869 #if INCLUDE_CDS
3870 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3871 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3872 }
3873 #endif
3874
3875 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3876 st->print("(");
3877 objArrayOop pts = ptypes(mt);
3878 for (int i = 0, limit = pts->length(); i < limit; i++) {
3879 java_lang_Class::print_signature(pts->obj_at(i), st);
3880 }
3881 st->print(")");
3882 java_lang_Class::print_signature(rtype(mt), st);
3883 }
3884
3885 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
3886 ResourceMark rm;
3887 stringStream buffer(128);
3888 print_signature(mt, &buffer);
3889 const char* sigstr = buffer.base();
3890 int siglen = (int) buffer.size();
3891 Symbol *name;
3892 if (!intern_if_not_found) {
3893 name = SymbolTable::probe(sigstr, siglen);
3894 } else {
3895 name = SymbolTable::new_symbol(sigstr, siglen);
3896 }
3897 return name;
3898 }
3899
3900 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3901 if (mt1 == mt2)
3902 return true;
3903 if (rtype(mt1) != rtype(mt2))
3904 return false;
3905 if (ptype_count(mt1) != ptype_count(mt2))
3906 return false;
3907 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3908 if (ptype(mt1, i) != ptype(mt2, i))
3909 return false;
3910 }
3911 return true;
3912 }
3913
3914 oop java_lang_invoke_MethodType::rtype(oop mt) {
3915 assert(is_instance(mt), "must be a MethodType");
3916 return mt->obj_field(_rtype_offset);
3917 }
3918
3919 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3920 assert(is_instance(mt), "must be a MethodType");
3921 return (objArrayOop) mt->obj_field(_ptypes_offset);
3922 }
3923
3924 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3925 return ptypes(mt)->obj_at(idx);
3926 }
3927
3928 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3929 return ptypes(mt)->length();
3930 }
3931
3932 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3933 objArrayOop pts = ptypes(mt);
3934 int count = pts->length();
3935 int slots = 0;
3936 for (int i = 0; i < count; i++) {
3937 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3938 slots += type2size[bt];
3939 }
3940 return slots;
3941 }
3942
3943 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3944 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3945 return type2size[bt];
3946 }
3947
3948
3949 // Support for java_lang_invoke_CallSite
3950
3951 int java_lang_invoke_CallSite::_target_offset;
3952 int java_lang_invoke_CallSite::_context_offset;
3953
3954 #define CALLSITE_FIELDS_DO(macro) \
3955 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3956 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3957
3958 void java_lang_invoke_CallSite::compute_offsets() {
3959 InstanceKlass* k = SystemDictionary::CallSite_klass();
3960 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3961 }
3962
3963 #if INCLUDE_CDS
3964 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3965 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3966 }
3967 #endif
3968
3969 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3970 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3971
3972 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3973 return dep_oop;
3974 }
3975
3976 // Support for java_lang_invoke_ConstantCallSite
3977
3978 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
3979
3980 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
3981 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
3982
3983 void java_lang_invoke_ConstantCallSite::compute_offsets() {
3984 InstanceKlass* k = SystemDictionary::ConstantCallSite_klass();
3985 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3986 }
3987
3988 #if INCLUDE_CDS
3989 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
3990 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3991 }
3992 #endif
3993
3994 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3995
3996 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3997 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3998
3999 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4000 InstanceKlass* k = SystemDictionary::Context_klass();
4001 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4002 }
4003
4004 #if INCLUDE_CDS
4005 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4006 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4007 }
4008 #endif
4009
4010 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4011 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4012 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
4013 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
4014 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4015 return dep_ctx;
4016 }
4017
4018 // Support for java_security_AccessControlContext
4019
4020 int java_security_AccessControlContext::_context_offset = 0;
4021 int java_security_AccessControlContext::_privilegedContext_offset = 0;
4022 int java_security_AccessControlContext::_isPrivileged_offset = 0;
4023 int java_security_AccessControlContext::_isAuthorized_offset = -1;
4024
4025 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4026 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4027 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4028 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4029 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4030
4031 void java_security_AccessControlContext::compute_offsets() {
4032 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4033 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
4034 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4035 }
4036
4037 #if INCLUDE_CDS
4038 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4039 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4040 }
4041 #endif
4042
4043 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4044 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4045 // Ensure klass is initialized
4046 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
4047 // Allocate result
4048 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
4049 // Fill in values
4050 result->obj_field_put(_context_offset, context());
4051 result->obj_field_put(_privilegedContext_offset, privileged_context());
4052 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4053 // whitelist AccessControlContexts created by the JVM if present
4054 if (_isAuthorized_offset != -1) {
4055 result->bool_field_put(_isAuthorized_offset, true);
4056 }
4057 return result;
4058 }
4059
4060
4061 // Support for java_lang_ClassLoader
4062
4063 bool java_lang_ClassLoader::offsets_computed = false;
4064 int java_lang_ClassLoader::_loader_data_offset = -1;
4065 int java_lang_ClassLoader::parallelCapable_offset = -1;
4066 int java_lang_ClassLoader::name_offset = -1;
4067 int java_lang_ClassLoader::nameAndId_offset = -1;
4068 int java_lang_ClassLoader::unnamedModule_offset = -1;
4069
4070 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4071 assert(loader != NULL, "loader must not be NULL");
4072 assert(oopDesc::is_oop(loader), "loader must be oop");
4073 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
4074 }
4075
4076 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
4077 assert(loader != NULL, "loader must not be NULL");
4078 assert(oopDesc::is_oop(loader), "loader must be oop");
4079 return RawAccess<>::load_at(loader, _loader_data_offset);
4080 }
4081
4082 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4083 assert(loader != NULL, "loader must not be NULL");
4084 assert(oopDesc::is_oop(loader), "loader must be oop");
4085 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
4086 }
4087
4088 #define CLASSLOADER_FIELDS_DO(macro) \
4089 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4090 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4091 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
4092 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4093 macro(parent_offset, k1, "parent", classloader_signature, false)
4094
4095 void java_lang_ClassLoader::compute_offsets() {
4096 assert(!offsets_computed, "offsets should be initialized only once");
4097 offsets_computed = true;
4098
4099 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
4100 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4101
4102 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4103 }
4104
4105 #if INCLUDE_CDS
4106 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4107 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4108 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4109 }
4110 #endif
4111
4112 oop java_lang_ClassLoader::parent(oop loader) {
4113 assert(is_instance(loader), "loader must be oop");
4114 return loader->obj_field(parent_offset);
4115 }
4116
4117 // Returns the name field of this class loader. If the name field has not
4118 // been set, null will be returned.
4119 oop java_lang_ClassLoader::name(oop loader) {
4120 assert(is_instance(loader), "loader must be oop");
4121 return loader->obj_field(name_offset);
4122 }
4123
4124 // Returns the nameAndId field of this class loader. The format is
4125 // as follows:
4126 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4127 // If the defining loader has no name then <qualified-class-name> @<id>
4128 // If built-in loader, then omit '@<id>' as there is only one instance.
4129 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4130 oop java_lang_ClassLoader::nameAndId(oop loader) {
4131 assert(is_instance(loader), "loader must be oop");
4132 return loader->obj_field(nameAndId_offset);
4133 }
4134
4135 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4136 assert(is_instance(loader), "loader must be oop");
4137 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4138 oop acl = loader;
4139 debug_only(jint loop_count = 0);
4140 // This loop taken verbatim from ClassLoader.java:
4141 do {
4142 acl = parent(acl);
4143 if (cl == acl) {
4144 return true;
4145 }
4146 assert(++loop_count > 0, "loop_count overflow");
4147 } while (acl != NULL);
4148 return false;
4149 }
4150
4151 bool java_lang_ClassLoader::is_instance(oop obj) {
4152 return obj != NULL && is_subclass(obj->klass());
4153 }
4154
4155
4156 // For class loader classes, parallelCapable defined
4157 // based on non-null field
4158 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4159 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4160 if (parallelCapable_offset == -1) {
4161 // Default for backward compatibility is false
4162 return false;
4163 }
4164 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4165 }
4166
4167 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4168 // Fix for 4474172; see evaluation for more details
4169 loader = non_reflection_class_loader(loader);
4170
4171 oop cl = SystemDictionary::java_system_loader();
4172 while(cl != NULL) {
4173 if (cl == loader) return true;
4174 cl = parent(cl);
4175 }
4176 return false;
4177 }
4178
4179 // Return true if this is one of the class loaders associated with
4180 // the generated bytecodes for reflection.
4181 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4182 if (loader != NULL) {
4183 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4184 // This might be null in non-1.4 JDKs
4185 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4186 }
4187 return false;
4188 }
4189
4190 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4191 // See whether this is one of the class loaders associated with
4192 // the generated bytecodes for reflection, and if so, "magically"
4193 // delegate to its parent to prevent class loading from occurring
4194 // in places where applications using reflection didn't expect it.
4195 if (is_reflection_class_loader(loader)) {
4196 return parent(loader);
4197 }
4198 return loader;
4199 }
4200
4201 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4202 assert(is_instance(loader), "loader must be oop");
4203 return loader->obj_field(unnamedModule_offset);
4204 }
4205
4206 // Support for java_lang_System
4207 //
4208 #define SYSTEM_FIELDS_DO(macro) \
4209 macro(static_in_offset, k, "in", input_stream_signature, true); \
4210 macro(static_out_offset, k, "out", print_stream_signature, true); \
4211 macro(static_err_offset, k, "err", print_stream_signature, true); \
4212 macro(static_security_offset, k, "security", security_manager_signature, true)
4213
4214 void java_lang_System::compute_offsets() {
4215 InstanceKlass* k = SystemDictionary::System_klass();
4216 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4217 }
4218
4219 #if INCLUDE_CDS
4220 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4221 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4222 }
4223 #endif
4224
4225 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4226 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4227 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4228
4229 // Support for jdk_internal_misc_UnsafeConstants
4230 //
4231 class UnsafeConstantsFixup : public FieldClosure {
4232 private:
4233 int _address_size;
4234 int _page_size;
4235 bool _big_endian;
4236 bool _use_unaligned_access;
4237 int _data_cache_line_flush_size;
4238 public:
4239 UnsafeConstantsFixup() {
4240 // round up values for all static final fields
4241 _address_size = sizeof(void*);
4242 _page_size = os::vm_page_size();
4243 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4244 _use_unaligned_access = UseUnalignedAccesses;
4245 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4246 }
4247
4248 void do_field(fieldDescriptor* fd) {
4249 oop mirror = fd->field_holder()->java_mirror();
4250 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4251 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4252 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4253 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4254 if (fd->name() == vmSymbols::address_size_name()) {
4255 mirror->int_field_put(fd->offset(), _address_size);
4256 } else if (fd->name() == vmSymbols::page_size_name()) {
4257 mirror->int_field_put(fd->offset(), _page_size);
4258 } else if (fd->name() == vmSymbols::big_endian_name()) {
4259 mirror->bool_field_put(fd->offset(), _big_endian);
4260 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4261 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4262 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4263 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4264 } else {
4265 assert(false, "unexpected UnsafeConstants field");
4266 }
4267 }
4268 };
4269
4270 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4271 UnsafeConstantsFixup fixup;
4272 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4273 }
4274
4275 int java_lang_Class::_klass_offset;
4276 int java_lang_Class::_array_klass_offset;
4277 int java_lang_Class::_oop_size_offset;
4278 int java_lang_Class::_static_oop_field_count_offset;
4279 int java_lang_Class::_class_loader_offset;
4280 int java_lang_Class::_module_offset;
4281 int java_lang_Class::_protection_domain_offset;
4282 int java_lang_Class::_component_mirror_offset;
4283 int java_lang_Class::_init_lock_offset;
4284 int java_lang_Class::_signers_offset;
4285 int java_lang_Class::_name_offset;
4286 int java_lang_Class::_source_file_offset;
4287 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4288 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4289 int java_lang_Throwable::backtrace_offset;
4290 int java_lang_Throwable::detailMessage_offset;
4291 int java_lang_Throwable::stackTrace_offset;
4292 int java_lang_Throwable::depth_offset;
4293 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4294 int java_lang_reflect_AccessibleObject::override_offset;
4295 int java_lang_reflect_Method::clazz_offset;
4296 int java_lang_reflect_Method::name_offset;
4297 int java_lang_reflect_Method::returnType_offset;
4298 int java_lang_reflect_Method::parameterTypes_offset;
4299 int java_lang_reflect_Method::exceptionTypes_offset;
4300 int java_lang_reflect_Method::slot_offset;
4301 int java_lang_reflect_Method::modifiers_offset;
4302 int java_lang_reflect_Method::signature_offset;
4303 int java_lang_reflect_Method::annotations_offset;
4304 int java_lang_reflect_Method::parameter_annotations_offset;
4305 int java_lang_reflect_Method::annotation_default_offset;
4306 int java_lang_reflect_Constructor::clazz_offset;
4307 int java_lang_reflect_Constructor::parameterTypes_offset;
4308 int java_lang_reflect_Constructor::exceptionTypes_offset;
4309 int java_lang_reflect_Constructor::slot_offset;
4310 int java_lang_reflect_Constructor::modifiers_offset;
4311 int java_lang_reflect_Constructor::signature_offset;
4312 int java_lang_reflect_Constructor::annotations_offset;
4313 int java_lang_reflect_Constructor::parameter_annotations_offset;
4314 int java_lang_reflect_Field::clazz_offset;
4315 int java_lang_reflect_Field::name_offset;
4316 int java_lang_reflect_Field::type_offset;
4317 int java_lang_reflect_Field::slot_offset;
4318 int java_lang_reflect_Field::modifiers_offset;
4319 int java_lang_reflect_Field::signature_offset;
4320 int java_lang_reflect_Field::annotations_offset;
4321 int java_lang_reflect_Parameter::name_offset;
4322 int java_lang_reflect_Parameter::modifiers_offset;
4323 int java_lang_reflect_Parameter::index_offset;
4324 int java_lang_reflect_Parameter::executable_offset;
4325 int java_lang_boxing_object::value_offset;
4326 int java_lang_boxing_object::long_value_offset;
4327 int java_lang_ref_Reference::referent_offset;
4328 int java_lang_ref_Reference::queue_offset;
4329 int java_lang_ref_Reference::next_offset;
4330 int java_lang_ref_Reference::discovered_offset;
4331 int java_lang_ref_SoftReference::timestamp_offset;
4332 int java_lang_ref_SoftReference::static_clock_offset;
4333 int java_lang_ClassLoader::parent_offset;
4334 int java_lang_System::static_in_offset;
4335 int java_lang_System::static_out_offset;
4336 int java_lang_System::static_err_offset;
4337 int java_lang_System::static_security_offset;
4338 int java_lang_StackTraceElement::methodName_offset;
4339 int java_lang_StackTraceElement::fileName_offset;
4340 int java_lang_StackTraceElement::lineNumber_offset;
4341 int java_lang_StackTraceElement::moduleName_offset;
4342 int java_lang_StackTraceElement::moduleVersion_offset;
4343 int java_lang_StackTraceElement::classLoaderName_offset;
4344 int java_lang_StackTraceElement::declaringClass_offset;
4345 int java_lang_StackTraceElement::declaringClassObject_offset;
4346 int java_lang_StackFrameInfo::_memberName_offset;
4347 int java_lang_StackFrameInfo::_bci_offset;
4348 int java_lang_StackFrameInfo::_version_offset;
4349 int java_lang_LiveStackFrameInfo::_monitors_offset;
4350 int java_lang_LiveStackFrameInfo::_locals_offset;
4351 int java_lang_LiveStackFrameInfo::_operands_offset;
4352 int java_lang_LiveStackFrameInfo::_mode_offset;
4353 int java_lang_AssertionStatusDirectives::classes_offset;
4354 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4355 int java_lang_AssertionStatusDirectives::packages_offset;
4356 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4357 int java_lang_AssertionStatusDirectives::deflt_offset;
4358 int java_nio_Buffer::_limit_offset;
4359 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4360 int reflect_ConstantPool::_oop_offset;
4361 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4362 int java_lang_Integer_IntegerCache::_static_cache_offset;
4363 int java_lang_Long_LongCache::_static_cache_offset;
4364 int java_lang_Character_CharacterCache::_static_cache_offset;
4365 int java_lang_Short_ShortCache::_static_cache_offset;
4366 int java_lang_Byte_ByteCache::_static_cache_offset;
4367 int java_lang_Boolean::_static_TRUE_offset;
4368 int java_lang_Boolean::_static_FALSE_offset;
4369 int java_lang_reflect_RecordComponent::clazz_offset;
4370 int java_lang_reflect_RecordComponent::name_offset;
4371 int java_lang_reflect_RecordComponent::type_offset;
4372 int java_lang_reflect_RecordComponent::accessor_offset;
4373 int java_lang_reflect_RecordComponent::signature_offset;
4374 int java_lang_reflect_RecordComponent::annotations_offset;
4375 int java_lang_reflect_RecordComponent::typeAnnotations_offset;
4376
4377
4378
4379 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4380 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4381 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4382 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4383 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4384 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4385 macro(methodName_offset, k, "methodName", string_signature, false); \
4386 macro(fileName_offset, k, "fileName", string_signature, false); \
4387 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4388
4389 // Support for java_lang_StackTraceElement
4390 void java_lang_StackTraceElement::compute_offsets() {
4391 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4392 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4393 }
4394
4395 #if INCLUDE_CDS
4396 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4397 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4398 }
4399 #endif
4400
4401 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4402 element->obj_field_put(fileName_offset, value);
4403 }
4404
4405 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4406 element->obj_field_put(declaringClass_offset, value);
4407 }
4408
4409 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4410 element->obj_field_put(methodName_offset, value);
4411 }
4412
4413 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4414 element->int_field_put(lineNumber_offset, value);
4415 }
4416
4417 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4418 element->obj_field_put(moduleName_offset, value);
4419 }
4420
4421 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4422 element->obj_field_put(moduleVersion_offset, value);
4423 }
4424
4425 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4426 element->obj_field_put(classLoaderName_offset, value);
4427 }
4428
4429 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4430 element->obj_field_put(declaringClassObject_offset, value);
4431 }
4432
4433 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4434 element->short_field_put(_version_offset, value);
4435 }
4436
4437 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4438 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
4439 element->int_field_put(_bci_offset, value);
4440 }
4441
4442 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4443 element->obj_field_put(_monitors_offset, value);
4444 }
4445
4446 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4447 element->obj_field_put(_locals_offset, value);
4448 }
4449
4450 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4451 element->obj_field_put(_operands_offset, value);
4452 }
4453
4454 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4455 element->int_field_put(_mode_offset, value);
4456 }
4457
4458 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4459 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4460 macro(classes_offset, k, "classes", string_array_signature, false); \
4461 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4462 macro(packages_offset, k, "packages", string_array_signature, false); \
4463 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4464 macro(deflt_offset, k, "deflt", bool_signature, false)
4465
4466 void java_lang_AssertionStatusDirectives::compute_offsets() {
4467 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4468 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4469 }
4470
4471 #if INCLUDE_CDS
4472 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4473 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4474 }
4475 #endif
4476
4477 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4478 o->obj_field_put(classes_offset, val);
4479 }
4480
4481 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4482 o->obj_field_put(classEnabled_offset, val);
4483 }
4484
4485 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4486 o->obj_field_put(packages_offset, val);
4487 }
4488
4489 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4490 o->obj_field_put(packageEnabled_offset, val);
4491 }
4492
4493 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4494 o->bool_field_put(deflt_offset, val);
4495 }
4496
4497
4498 // Support for intrinsification of java.nio.Buffer.checkIndex
4499 int java_nio_Buffer::limit_offset() {
4500 return _limit_offset;
4501 }
4502
4503 #define BUFFER_FIELDS_DO(macro) \
4504 macro(_limit_offset, k, "limit", int_signature, false)
4505
4506 void java_nio_Buffer::compute_offsets() {
4507 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4508 assert(k != NULL, "must be loaded in 1.4+");
4509 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4510 }
4511
4512 #if INCLUDE_CDS
4513 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4514 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4515 }
4516 #endif
4517
4518 #define AOS_FIELDS_DO(macro) \
4519 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4520
4521 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4522 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4523 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4524 }
4525
4526 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4527 assert(_owner_offset != 0, "Must be initialized");
4528 return obj->obj_field(_owner_offset);
4529 }
4530
4531 #if INCLUDE_CDS
4532 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4533 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4534 }
4535 #endif
4536
4537 #define INTEGER_CACHE_FIELDS_DO(macro) \
4538 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4539
4540 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4541 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4542 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4543 }
4544
4545 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4546 oop base = ik->static_field_base_raw();
4547 return objArrayOop(base->obj_field(_static_cache_offset));
4548 }
4549
4550 Symbol* java_lang_Integer_IntegerCache::symbol() {
4551 return vmSymbols::java_lang_Integer_IntegerCache();
4552 }
4553
4554 #if INCLUDE_CDS
4555 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4556 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4557 }
4558 #endif
4559 #undef INTEGER_CACHE_FIELDS_DO
4560
4561 jint java_lang_Integer::value(oop obj) {
4562 jvalue v;
4563 java_lang_boxing_object::get_value(obj, &v);
4564 return v.i;
4565 }
4566
4567 #define LONG_CACHE_FIELDS_DO(macro) \
4568 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4569
4570 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4571 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4572 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4573 }
4574
4575 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4576 oop base = ik->static_field_base_raw();
4577 return objArrayOop(base->obj_field(_static_cache_offset));
4578 }
4579
4580 Symbol* java_lang_Long_LongCache::symbol() {
4581 return vmSymbols::java_lang_Long_LongCache();
4582 }
4583
4584 #if INCLUDE_CDS
4585 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4586 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4587 }
4588 #endif
4589 #undef LONG_CACHE_FIELDS_DO
4590
4591 jlong java_lang_Long::value(oop obj) {
4592 jvalue v;
4593 java_lang_boxing_object::get_value(obj, &v);
4594 return v.j;
4595 }
4596
4597 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4598 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4599
4600 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4601 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4602 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4603 }
4604
4605 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4606 oop base = ik->static_field_base_raw();
4607 return objArrayOop(base->obj_field(_static_cache_offset));
4608 }
4609
4610 Symbol* java_lang_Character_CharacterCache::symbol() {
4611 return vmSymbols::java_lang_Character_CharacterCache();
4612 }
4613
4614 #if INCLUDE_CDS
4615 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4616 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4617 }
4618 #endif
4619 #undef CHARACTER_CACHE_FIELDS_DO
4620
4621 jchar java_lang_Character::value(oop obj) {
4622 jvalue v;
4623 java_lang_boxing_object::get_value(obj, &v);
4624 return v.c;
4625 }
4626
4627 #define SHORT_CACHE_FIELDS_DO(macro) \
4628 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4629
4630 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4631 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4632 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4633 }
4634
4635 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4636 oop base = ik->static_field_base_raw();
4637 return objArrayOop(base->obj_field(_static_cache_offset));
4638 }
4639
4640 Symbol* java_lang_Short_ShortCache::symbol() {
4641 return vmSymbols::java_lang_Short_ShortCache();
4642 }
4643
4644 #if INCLUDE_CDS
4645 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
4646 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4647 }
4648 #endif
4649 #undef SHORT_CACHE_FIELDS_DO
4650
4651 jshort java_lang_Short::value(oop obj) {
4652 jvalue v;
4653 java_lang_boxing_object::get_value(obj, &v);
4654 return v.s;
4655 }
4656
4657 #define BYTE_CACHE_FIELDS_DO(macro) \
4658 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
4659
4660 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
4661 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4662 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4663 }
4664
4665 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
4666 oop base = ik->static_field_base_raw();
4667 return objArrayOop(base->obj_field(_static_cache_offset));
4668 }
4669
4670 Symbol* java_lang_Byte_ByteCache::symbol() {
4671 return vmSymbols::java_lang_Byte_ByteCache();
4672 }
4673
4674 #if INCLUDE_CDS
4675 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
4676 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4677 }
4678 #endif
4679 #undef BYTE_CACHE_FIELDS_DO
4680
4681 jbyte java_lang_Byte::value(oop obj) {
4682 jvalue v;
4683 java_lang_boxing_object::get_value(obj, &v);
4684 return v.b;
4685 }
4686 #define BOOLEAN_FIELDS_DO(macro) \
4687 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
4688 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
4689
4690
4691 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
4692 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4693 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4694 }
4695
4696 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
4697 oop base = ik->static_field_base_raw();
4698 return base->obj_field(_static_TRUE_offset);
4699 }
4700
4701 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
4702 oop base = ik->static_field_base_raw();
4703 return base->obj_field(_static_FALSE_offset);
4704 }
4705
4706 Symbol* java_lang_Boolean::symbol() {
4707 return vmSymbols::java_lang_Boolean();
4708 }
4709
4710 #if INCLUDE_CDS
4711 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
4712 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4713 }
4714 #endif
4715 #undef BOOLEAN_CACHE_FIELDS_DO
4716
4717 jboolean java_lang_Boolean::value(oop obj) {
4718 jvalue v;
4719 java_lang_boxing_object::get_value(obj, &v);
4720 return v.z;
4721 }
4722
4723 static int member_offset(int hardcoded_offset) {
4724 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4725 }
4726
4727 #define RECORDCOMPONENT_FIELDS_DO(macro) \
4728 macro(clazz_offset, k, "clazz", class_signature, false); \
4729 macro(name_offset, k, "name", string_signature, false); \
4730 macro(type_offset, k, "type", class_signature, false); \
4731 macro(accessor_offset, k, "accessor", reflect_method_signature, false); \
4732 macro(signature_offset, k, "signature", string_signature, false); \
4733 macro(annotations_offset, k, "annotations", byte_array_signature, false); \
4734 macro(typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
4735
4736 // Support for java_lang_reflect_RecordComponent
4737 void java_lang_reflect_RecordComponent::compute_offsets() {
4738 InstanceKlass* k = SystemDictionary::RecordComponent_klass();
4739 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4740 }
4741
4742 #if INCLUDE_CDS
4743 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
4744 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4745 }
4746 #endif
4747
4748 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
4749 element->obj_field_put(clazz_offset, value);
4750 }
4751
4752 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
4753 element->obj_field_put(name_offset, value);
4754 }
4755
4756 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
4757 element->obj_field_put(type_offset, value);
4758 }
4759
4760 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
4761 element->obj_field_put(accessor_offset, value);
4762 }
4763
4764 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
4765 element->obj_field_put(signature_offset, value);
4766 }
4767
4768 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
4769 element->obj_field_put(annotations_offset, value);
4770 }
4771
4772 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
4773 element->obj_field_put(typeAnnotations_offset, value);
4774 }
4775
4776 // Compute hard-coded offsets
4777 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4778 // are not available to determine the offset_of_static_fields.
4779 void JavaClasses::compute_hard_coded_offsets() {
4780
4781 // java_lang_boxing_object
4782 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4783 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4784
4785 // java_lang_ref_Reference
4786 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4787 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4788 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4789 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4790 }
4791
4792 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4793
4794 // Compute non-hard-coded field offsets of all the classes in this file
4795 void JavaClasses::compute_offsets() {
4796 if (UseSharedSpaces) {
4797 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4798 JvmtiExport::has_early_class_hook_env()),
4799 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4800 // None of the classes used by the rest of this function can be replaced by
4801 // JMVTI ClassFileLoadHook.
4802 // We are safe to use the archived offsets, which have already been restored
4803 // by JavaClasses::serialize_offsets, without computing the offsets again.
4804 return;
4805 }
4806
4807 // We have already called the compute_offsets() of the
4808 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4809 // earlier inside SystemDictionary::resolve_well_known_classes()
4810 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4811 }
4812
4813 #if INCLUDE_CDS
4814 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4815
4816 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4817 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4818 }
4819 #endif
4820
4821 #if INCLUDE_CDS_JAVA_HEAP
4822 bool JavaClasses::is_supported_for_archiving(oop obj) {
4823 Klass* klass = obj->klass();
4824
4825 if (klass == SystemDictionary::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed.
4826 klass == SystemDictionary::Module_klass() || // Module::module_entry is malloc'ed
4827 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
4828 // regular Java code. The implementation of java.lang.invoke uses generated anonymoys classes
4829 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
4830 // So for now we cannot not support these classes for archiving.
4831 //
4832 // These objects typically are not referenced by static fields, but rather by resolved
4833 // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
4834 klass == SystemDictionary::ResolvedMethodName_klass() ||
4835 klass == SystemDictionary::MemberName_klass() ||
4836 klass == SystemDictionary::Context_klass()) {
4837 return false;
4838 }
4839
4840 return true;
4841 }
4842 #endif
4843
4844 #ifndef PRODUCT
4845
4846 // These functions exist to assert the validity of hard-coded field offsets to guard
4847 // against changes in the class files
4848
4849 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4850 EXCEPTION_MARK;
4851 fieldDescriptor fd;
4852 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
4853 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4854 InstanceKlass* ik = InstanceKlass::cast(k);
4855 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
4856 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
4857 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4858 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4859 return false;
4860 }
4861 if (fd.is_static()) {
4862 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4863 return false;
4864 }
4865 if (fd.offset() == hardcoded_offset ) {
4866 return true;
4867 } else {
4868 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4869 klass_name, field_name, hardcoded_offset, fd.offset());
4870 return false;
4871 }
4872 }
4873
4874 // Check the hard-coded field offsets of all the classes in this file
4875
4876 void JavaClasses::check_offsets() {
4877 bool valid = true;
4878
4879 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4880 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4881
4882 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4883 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4884
4885 // Boxed primitive objects (java_lang_boxing_object)
4886
4887 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4888 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4889 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4890 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4891 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4892 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4893 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4894 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4895
4896 // java.lang.ref.Reference
4897
4898 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4899 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4900 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4901 // Fake field
4902 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4903
4904 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4905 }
4906
4907 #endif // PRODUCT
4908
4909 int InjectedField::compute_offset() {
4910 InstanceKlass* ik = InstanceKlass::cast(klass());
4911 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4912 if (!may_be_java && !fs.access_flags().is_internal()) {
4913 // Only look at injected fields
4914 continue;
4915 }
4916 if (fs.name() == name() && fs.signature() == signature()) {
4917 return fs.offset();
4918 }
4919 }
4920 ResourceMark rm;
4921 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)" : "");
4922 #ifndef PRODUCT
4923 ik->print();
4924 tty->print_cr("all fields:");
4925 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4926 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4927 }
4928 #endif //PRODUCT
4929 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4930 return -1;
4931 }
4932
4933 void javaClasses_init() {
4934 JavaClasses::compute_offsets();
4935 JavaClasses::check_offsets();
4936 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4937 }