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