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 "oops/valueArrayKlass.hpp"
54 #include "prims/jvmtiExport.hpp"
55 #include "prims/resolvedMethodTable.hpp"
56 #include "runtime/fieldDescriptor.inline.hpp"
57 #include "runtime/frame.inline.hpp"
58 #include "runtime/handles.inline.hpp"
59 #include "runtime/interfaceSupport.inline.hpp"
60 #include "runtime/java.hpp"
61 #include "runtime/javaCalls.hpp"
62 #include "runtime/jniHandles.inline.hpp"
63 #include "runtime/safepoint.hpp"
64 #include "runtime/safepointVerifiers.hpp"
65 #include "runtime/thread.inline.hpp"
66 #include "runtime/vframe.inline.hpp"
67 #include "utilities/align.hpp"
68 #include "utilities/preserveException.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::coder_offset = 0;
164
165 bool java_lang_String::initialized = false;
166
167 bool java_lang_String::is_instance(oop obj) {
168 return is_instance_inlined(obj);
169 }
170
171 #if INCLUDE_CDS
172 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
173 f->do_u4((u4*)&offset)
174 #endif
175
176 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
177 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
178
179 #define STRING_FIELDS_DO(macro) \
180 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
181 macro(hash_offset, k, "hash", int_signature, false); \
182 macro(coder_offset, k, "coder", byte_signature, false)
183
184 void java_lang_String::compute_offsets() {
185 if (initialized) {
186 return;
187 }
188
189 InstanceKlass* k = SystemDictionary::String_klass();
190 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
191
192 initialized = true;
193 }
194
195 #if INCLUDE_CDS
196 void java_lang_String::serialize_offsets(SerializeClosure* f) {
197 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
198 f->do_u4((u4*)&initialized);
199 }
200 #endif
201
202 class CompactStringsFixup : public FieldClosure {
203 private:
204 bool _value;
205
206 public:
207 CompactStringsFixup(bool value) : _value(value) {}
208
209 void do_field(fieldDescriptor* fd) {
210 if (fd->name() == vmSymbols::compact_strings_name()) {
211 oop mirror = fd->field_holder()->java_mirror();
212 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
213 assert(mirror != NULL, "String must have mirror already");
214 mirror->bool_field_put(fd->offset(), _value);
215 }
216 }
217 };
218
219 void java_lang_String::set_compact_strings(bool value) {
220 CompactStringsFixup fix(value);
221 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
222 }
223
224 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
225 assert(initialized, "Must be initialized");
226 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
227
228 // Create the String object first, so there's a chance that the String
229 // and the char array it points to end up in the same cache line.
230 oop obj;
231 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
232
233 // Create the char array. The String object must be handlized here
234 // because GC can happen as a result of the allocation attempt.
235 Handle h_obj(THREAD, obj);
236 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
237 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
238
239 // Point the String at the char array
240 obj = h_obj();
241 set_value(obj, buffer);
242 // No need to zero the offset, allocation zero'ed the entire String object
243 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
244 return h_obj;
245 }
246
247 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
248 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
249 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
250 typeArrayOop buffer = value(h_obj());
251 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
252 if (is_latin1) {
253 for (int index = 0; index < length; index++) {
254 buffer->byte_at_put(index, (jbyte)unicode[index]);
255 }
256 } else {
257 for (int index = 0; index < length; index++) {
258 buffer->char_at_put(index, unicode[index]);
259 }
260 }
261
262 #ifdef ASSERT
263 {
264 ResourceMark rm;
265 char* expected = UNICODE::as_utf8(unicode, length);
266 char* actual = as_utf8_string(h_obj());
267 if (strcmp(expected, actual) != 0) {
268 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
269 ShouldNotReachHere();
270 }
271 }
272 #endif
273
274 return h_obj;
275 }
276
277 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
278 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
279 return h_obj();
280 }
281
282 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
283 if (utf8_str == NULL) {
284 return Handle();
285 }
286 bool has_multibyte, is_latin1;
287 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
288 if (!CompactStrings) {
289 has_multibyte = true;
290 is_latin1 = false;
291 }
292
293 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
294 if (length > 0) {
295 if (!has_multibyte) {
296 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
297 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
298 } else if (is_latin1) {
299 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
300 } else {
301 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
302 }
303 }
304
305 #ifdef ASSERT
306 // This check is too strict because the input string is not necessarily valid UTF8.
307 // For example, it may be created with arbitrary content via jni_NewStringUTF.
308 /*
309 {
310 ResourceMark rm;
311 const char* expected = utf8_str;
312 char* actual = as_utf8_string(h_obj());
313 if (strcmp(expected, actual) != 0) {
314 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
315 ShouldNotReachHere();
316 }
317 }
318 */
319 #endif
320
321 return h_obj;
322 }
323
324 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
325 Handle h_obj = create_from_str(utf8_str, CHECK_0);
326 return h_obj();
327 }
328
329 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
330 const char* utf8_str = (char*)symbol->bytes();
331 int utf8_len = symbol->utf8_length();
332
333 bool has_multibyte, is_latin1;
334 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
335 if (!CompactStrings) {
336 has_multibyte = true;
337 is_latin1 = false;
338 }
339
340 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
341 if (length > 0) {
342 if (!has_multibyte) {
343 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
344 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
345 } else if (is_latin1) {
346 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
347 } else {
348 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
349 }
350 }
351
352 #ifdef ASSERT
353 {
354 ResourceMark rm;
355 const char* expected = symbol->as_utf8();
356 char* actual = as_utf8_string(h_obj());
357 if (strncmp(expected, actual, utf8_len) != 0) {
358 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
359 ShouldNotReachHere();
360 }
361 }
362 #endif
363
364 return h_obj;
365 }
366
367 // Converts a C string to a Java String based on current encoding
368 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
369 assert(str != NULL, "bad arguments");
370
371 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
372 static to_java_string_fn_t _to_java_string_fn = NULL;
373
374 if (_to_java_string_fn == NULL) {
375 void *lib_handle = os::native_java_library();
376 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
377 if (_to_java_string_fn == NULL) {
378 fatal("NewStringPlatform missing");
379 }
380 }
381
382 jstring js = NULL;
383 { JavaThread* thread = (JavaThread*)THREAD;
384 assert(thread->is_Java_thread(), "must be java thread");
385 HandleMark hm(thread);
386 ThreadToNativeFromVM ttn(thread);
387 js = (_to_java_string_fn)(thread->jni_environment(), str);
388 }
389 return Handle(THREAD, JNIHandles::resolve(js));
390 }
391
392 // Converts a Java String to a native C string that can be used for
393 // native OS calls.
394 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
395 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
396 static to_platform_string_fn_t _to_platform_string_fn = NULL;
397
398 if (_to_platform_string_fn == NULL) {
399 void *lib_handle = os::native_java_library();
400 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
401 if (_to_platform_string_fn == NULL) {
402 fatal("GetStringPlatformChars missing");
403 }
404 }
405
406 char *native_platform_string;
407 { JavaThread* thread = (JavaThread*)THREAD;
408 assert(thread->is_Java_thread(), "must be java thread");
409 JNIEnv *env = thread->jni_environment();
410 jstring js = (jstring) JNIHandles::make_local(env, java_string());
411 bool is_copy;
412 HandleMark hm(thread);
413 ThreadToNativeFromVM ttn(thread);
414 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
415 assert(is_copy == JNI_TRUE, "is_copy value changed");
416 JNIHandles::destroy_local(js);
417 }
418 return native_platform_string;
419 }
420
421 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
422 oop obj = java_string();
423 // Typical usage is to convert all '/' to '.' in string.
424 typeArrayOop value = java_lang_String::value(obj);
425 int length = java_lang_String::length(obj, value);
426 bool is_latin1 = java_lang_String::is_latin1(obj);
427
428 // First check if any from_char exist
429 int index; // Declared outside, used later
430 for (index = 0; index < length; index++) {
431 jchar c = !is_latin1 ? value->char_at(index) :
432 ((jchar) value->byte_at(index)) & 0xff;
433 if (c == from_char) {
434 break;
435 }
436 }
437 if (index == length) {
438 // No from_char, so do not copy.
439 return java_string;
440 }
441
442 // Check if result string will be latin1
443 bool to_is_latin1 = false;
444
445 // Replacement char must be latin1
446 if (CompactStrings && UNICODE::is_latin1(to_char)) {
447 if (is_latin1) {
448 // Source string is latin1 as well
449 to_is_latin1 = true;
450 } else if (!UNICODE::is_latin1(from_char)) {
451 // We are replacing an UTF16 char. Scan string to
452 // check if result can be latin1 encoded.
453 to_is_latin1 = true;
454 for (index = 0; index < length; index++) {
455 jchar c = value->char_at(index);
456 if (c != from_char && !UNICODE::is_latin1(c)) {
457 to_is_latin1 = false;
458 break;
459 }
460 }
461 }
462 }
463
464 // Create new UNICODE (or byte) buffer. Must handlize value because GC
465 // may happen during String and char array creation.
466 typeArrayHandle h_value(THREAD, value);
467 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
468 typeArrayOop from_buffer = h_value();
469 typeArrayOop to_buffer = java_lang_String::value(string());
470
471 // Copy contents
472 for (index = 0; index < length; index++) {
473 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
474 ((jchar) from_buffer->byte_at(index)) & 0xff;
475 if (c == from_char) {
476 c = to_char;
477 }
478 if (!to_is_latin1) {
479 to_buffer->char_at_put(index, c);
480 } else {
481 to_buffer->byte_at_put(index, (jbyte) c);
482 }
483 }
484 return string;
485 }
486
487 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
488 typeArrayOop value = java_lang_String::value(java_string);
489 length = java_lang_String::length(java_string, value);
490 bool is_latin1 = java_lang_String::is_latin1(java_string);
491
492 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
493 if (result != NULL) {
494 if (!is_latin1) {
495 for (int index = 0; index < length; index++) {
496 result[index] = value->char_at(index);
497 }
498 } else {
499 for (int index = 0; index < length; index++) {
500 result[index] = ((jchar) value->byte_at(index)) & 0xff;
501 }
502 }
503 } else {
504 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
505 }
506 return result;
507 }
508
509 unsigned int java_lang_String::hash_code(oop java_string) {
510 typeArrayOop value = java_lang_String::value(java_string);
511 int length = java_lang_String::length(java_string, value);
512 // Zero length string will hash to zero with String.hashCode() function.
513 if (length == 0) return 0;
514
515 bool is_latin1 = java_lang_String::is_latin1(java_string);
516
517 if (is_latin1) {
518 return java_lang_String::hash_code(value->byte_at_addr(0), length);
519 } else {
520 return java_lang_String::hash_code(value->char_at_addr(0), length);
521 }
522 }
523
524 char* java_lang_String::as_quoted_ascii(oop java_string) {
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 if (length == 0) return NULL;
530
531 char* result;
532 int result_length;
533 if (!is_latin1) {
534 jchar* base = value->char_at_addr(0);
535 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
536 result = NEW_RESOURCE_ARRAY(char, result_length);
537 UNICODE::as_quoted_ascii(base, length, result, result_length);
538 } else {
539 jbyte* base = value->byte_at_addr(0);
540 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
541 result = NEW_RESOURCE_ARRAY(char, result_length);
542 UNICODE::as_quoted_ascii(base, length, result, result_length);
543 }
544 assert(result_length >= length + 1, "must not be shorter");
545 assert(result_length == (int)strlen(result) + 1, "must match");
546 return result;
547 }
548
549 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
550 typeArrayOop value = java_lang_String::value(java_string);
551 int length = java_lang_String::length(java_string, value);
552 bool is_latin1 = java_lang_String::is_latin1(java_string);
553 if (!is_latin1) {
554 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
555 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
556 return sym;
557 } else {
558 ResourceMark rm;
559 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
560 const char* base = UNICODE::as_utf8(position, length);
561 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
562 return sym;
563 }
564 }
565
566 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
567 typeArrayOop value = java_lang_String::value(java_string);
568 int length = java_lang_String::length(java_string, value);
569 bool is_latin1 = java_lang_String::is_latin1(java_string);
570 if (!is_latin1) {
571 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
572 return SymbolTable::probe_unicode(base, length);
573 } else {
574 ResourceMark rm;
575 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
576 const char* base = UNICODE::as_utf8(position, length);
577 return SymbolTable::probe(base, length);
578 }
579 }
580
581 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
582 assert(value_equals(value, java_lang_String::value(java_string)),
583 "value must be same as java_lang_String::value(java_string)");
584 int length = java_lang_String::length(java_string, value);
585 if (length == 0) {
586 return 0;
587 }
588 if (!java_lang_String::is_latin1(java_string)) {
589 return UNICODE::utf8_length(value->char_at_addr(0), length);
590 } else {
591 return UNICODE::utf8_length(value->byte_at_addr(0), length);
592 }
593 }
594
595 int java_lang_String::utf8_length(oop java_string) {
596 typeArrayOop value = java_lang_String::value(java_string);
597 return utf8_length(java_string, value);
598 }
599
600 char* java_lang_String::as_utf8_string(oop java_string) {
601 typeArrayOop value = java_lang_String::value(java_string);
602 int length = java_lang_String::length(java_string, value);
603 bool is_latin1 = java_lang_String::is_latin1(java_string);
604 if (!is_latin1) {
605 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
606 return UNICODE::as_utf8(position, length);
607 } else {
608 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
609 return UNICODE::as_utf8(position, length);
610 }
611 }
612
613 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
614 assert(value_equals(value, java_lang_String::value(java_string)),
615 "value must be same as java_lang_String::value(java_string)");
616 int length = java_lang_String::length(java_string, value);
617 bool is_latin1 = java_lang_String::is_latin1(java_string);
618 if (!is_latin1) {
619 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
620 return UNICODE::as_utf8(position, length, buf, buflen);
621 } else {
622 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
623 return UNICODE::as_utf8(position, length, buf, buflen);
624 }
625 }
626
627 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
628 typeArrayOop value = java_lang_String::value(java_string);
629 return as_utf8_string(java_string, value, buf, buflen);
630 }
631
632 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
633 typeArrayOop value = java_lang_String::value(java_string);
634 bool is_latin1 = java_lang_String::is_latin1(java_string);
635 assert(start + len <= java_lang_String::length(java_string), "just checking");
636 if (!is_latin1) {
637 jchar* position = value->char_at_addr(start);
638 return UNICODE::as_utf8(position, len);
639 } else {
640 jbyte* position = value->byte_at_addr(start);
641 return UNICODE::as_utf8(position, len);
642 }
643 }
644
645 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
646 assert(value_equals(value, java_lang_String::value(java_string)),
647 "value must be same as java_lang_String::value(java_string)");
648 assert(start + len <= java_lang_String::length(java_string), "just checking");
649 bool is_latin1 = java_lang_String::is_latin1(java_string);
650 if (!is_latin1) {
651 jchar* position = value->char_at_addr(start);
652 return UNICODE::as_utf8(position, len, buf, buflen);
653 } else {
654 jbyte* position = value->byte_at_addr(start);
655 return UNICODE::as_utf8(position, len, buf, buflen);
656 }
657 }
658
659 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
660 assert(java_string->klass() == SystemDictionary::String_klass(),
661 "must be java_string");
662 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
663 int length = java_lang_String::length(java_string, value);
664 if (length != len) {
665 return false;
666 }
667 bool is_latin1 = java_lang_String::is_latin1(java_string);
668 if (!is_latin1) {
669 for (int i = 0; i < len; i++) {
670 if (value->char_at(i) != chars[i]) {
671 return false;
672 }
673 }
674 } else {
675 for (int i = 0; i < len; i++) {
676 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
677 return false;
678 }
679 }
680 }
681 return true;
682 }
683
684 bool java_lang_String::equals(oop str1, oop str2) {
685 assert(str1->klass() == SystemDictionary::String_klass(),
686 "must be java String");
687 assert(str2->klass() == SystemDictionary::String_klass(),
688 "must be java String");
689 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
690 bool is_latin1 = java_lang_String::is_latin1(str1);
691 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
692 bool is_latin2 = java_lang_String::is_latin1(str2);
693
694 if (is_latin1 != is_latin2) {
695 // Strings with different coders are never equal.
696 return false;
697 }
698 return value_equals(value1, value2);
699 }
700
701 void java_lang_String::print(oop java_string, outputStream* st) {
702 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
703 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
704
705 if (value == NULL) {
706 // This can happen if, e.g., printing a String
707 // object before its initializer has been called
708 st->print("NULL");
709 return;
710 }
711
712 int length = java_lang_String::length(java_string, value);
713 bool is_latin1 = java_lang_String::is_latin1(java_string);
714
715 st->print("\"");
716 for (int index = 0; index < length; index++) {
717 st->print("%c", (!is_latin1) ? value->char_at(index) :
718 ((jchar) value->byte_at(index)) & 0xff );
719 }
720 st->print("\"");
721 }
722
723
724 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
725 assert(mirror.not_null() && fd->is_static(), "just checking");
726 if (fd->has_initial_value()) {
727 BasicType t = fd->field_type();
728 switch (t) {
729 case T_BYTE:
730 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
731 break;
732 case T_BOOLEAN:
733 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
734 break;
735 case T_CHAR:
736 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
737 break;
738 case T_SHORT:
739 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
740 break;
741 case T_INT:
742 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
743 break;
744 case T_FLOAT:
745 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
746 break;
747 case T_DOUBLE:
748 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
749 break;
750 case T_LONG:
751 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
752 break;
753 case T_OBJECT:
754 {
755 assert(fd->signature() == vmSymbols::string_signature(),
756 "just checking");
757 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
758 // Archive the String field and update the pointer.
759 oop s = mirror()->obj_field(fd->offset());
760 oop archived_s = StringTable::create_archived_string(s, CHECK);
761 mirror()->obj_field_put(fd->offset(), archived_s);
762 } else {
763 oop string = fd->string_initial_value(CHECK);
764 mirror()->obj_field_put(fd->offset(), string);
765 }
766 }
767 break;
768 default:
769 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
770 "Illegal ConstantValue attribute in class file");
771 }
772 }
773 }
774
775
776 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
777 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
778
779 // If the offset was read from the shared archive, it was fixed up already
780 if (!k->is_shared()) {
781 if (k->is_instance_klass()) {
782 // During bootstrap, java.lang.Class wasn't loaded so static field
783 // offsets were computed without the size added it. Go back and
784 // update all the static field offsets to included the size.
785 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
786 if (fs.access_flags().is_static()) {
787 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
788 fs.set_offset(real_offset);
789 }
790 }
791 }
792 }
793
794 if (k->is_shared() && k->has_raw_archived_mirror()) {
795 if (HeapShared::open_archive_heap_region_mapped()) {
796 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
797 assert(present, "Missing archived mirror for %s", k->external_name());
798 return;
799 } else {
800 k->set_java_mirror_handle(NULL);
801 k->clear_has_raw_archived_mirror();
802 }
803 }
804 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
805 }
806
807 void java_lang_Class::initialize_mirror_fields(Klass* k,
808 Handle mirror,
809 Handle protection_domain,
810 TRAPS) {
811 // Allocate a simple java object for a lock.
812 // This needs to be a java object because during class initialization
813 // it can be held across a java call.
814 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
815 set_init_lock(mirror(), r);
816
817 // Set protection domain also
818 set_protection_domain(mirror(), protection_domain());
819
820 // Initialize static fields
821 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
822 }
823
824 // Set the java.lang.Module module field in the java_lang_Class mirror
825 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
826 if (module.is_null()) {
827 // During startup, the module may be NULL only if java.base has not been defined yet.
828 // Put the class on the fixup_module_list to patch later when the java.lang.Module
829 // for java.base is known. But note that since we captured the NULL module another
830 // thread may have completed that initialization.
831
832 bool javabase_was_defined = false;
833 {
834 MutexLocker m1(Module_lock, THREAD);
835 // Keep list of classes needing java.base module fixup
836 if (!ModuleEntryTable::javabase_defined()) {
837 assert(k->java_mirror() != NULL, "Class's mirror is null");
838 k->class_loader_data()->inc_keep_alive();
839 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
840 fixup_module_field_list()->push(k);
841 } else {
842 javabase_was_defined = true;
843 }
844 }
845
846 // If java.base was already defined then patch this particular class with java.base.
847 if (javabase_was_defined) {
848 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
849 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
850 "Setting class module field, " JAVA_BASE_NAME " should be defined");
851 Handle javabase_handle(THREAD, javabase_entry->module());
852 set_module(mirror(), javabase_handle());
853 }
854 } else {
855 assert(Universe::is_module_initialized() ||
856 (ModuleEntryTable::javabase_defined() &&
857 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
858 "Incorrect java.lang.Module specification while creating mirror");
859 set_module(mirror(), module());
860 }
861 }
862
863 // Statically allocate fixup lists because they always get created.
864 void java_lang_Class::allocate_fixup_lists() {
865 GrowableArray<Klass*>* mirror_list =
866 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
867 set_fixup_mirror_list(mirror_list);
868
869 GrowableArray<Klass*>* module_list =
870 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
871 set_fixup_module_field_list(module_list);
872 }
873
874 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
875 Handle module, Handle protection_domain, TRAPS) {
876 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
877 assert(k->java_mirror() == NULL, "should only assign mirror once");
878
879 // Use this moment of initialization to cache modifier_flags also,
880 // to support Class.getModifiers(). Instance classes recalculate
881 // the cached flags after the class file is parsed, but before the
882 // class is put into the system dictionary.
883 int computed_modifiers = k->compute_modifier_flags(CHECK);
884 k->set_modifier_flags(computed_modifiers);
885 // Class_klass has to be loaded because it is used to allocate
886 // the mirror.
887 if (SystemDictionary::Class_klass_loaded()) {
888 // Allocate mirror (java.lang.Class instance)
889 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
890 Handle mirror(THREAD, mirror_oop);
891 Handle comp_mirror;
892
893 // Setup indirection from mirror->klass
894 java_lang_Class::set_klass(mirror(), k);
895
896 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
897 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
898
899 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
900
901 // It might also have a component mirror. This mirror must already exist.
902 if (k->is_array_klass()) {
903 if (k->is_valueArray_klass()) {
904 Klass* element_klass = (Klass*) ValueArrayKlass::cast(k)->element_klass();
905 assert(element_klass->is_value(), "Must be value type component");
906 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(element_klass));
907 comp_mirror = Handle(THREAD, vk->value_mirror());
908 }
909 else if (k->is_typeArray_klass()) {
910 BasicType type = TypeArrayKlass::cast(k)->element_type();
911 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
912 } else {
913 assert(k->is_objArray_klass(), "Must be");
914 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
915 assert(element_klass != NULL, "Must have an element klass");
916 if (element_klass->is_value() && k->name()->is_Q_array_signature()) {
917 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(element_klass));
918 comp_mirror = Handle(THREAD, vk->value_mirror());
919 } else {
920 comp_mirror = Handle(THREAD, element_klass->java_mirror());
921 }
922 }
923 assert(comp_mirror() != NULL, "must have a mirror");
924
925 // Two-way link between the array klass and its component mirror:
926 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
927 set_component_mirror(mirror(), comp_mirror());
928 // See below for ordering dependencies between field array_klass in component mirror
929 // and java_mirror in this klass.
930 } else {
931 assert(k->is_instance_klass(), "Must be");
932
933 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
934 if (HAS_PENDING_EXCEPTION) {
935 // If any of the fields throws an exception like OOM remove the klass field
936 // from the mirror so GC doesn't follow it after the klass has been deallocated.
937 // This mirror looks like a primitive type, which logically it is because it
938 // it represents no class.
939 java_lang_Class::set_klass(mirror(), NULL);
940 return;
941 }
942 }
943
944 // set the classLoader field in the java_lang_Class instance
945 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
946 set_class_loader(mirror(), class_loader());
947
948 // Setup indirection from klass->mirror
949 // after any exceptions can happen during allocations.
950 k->set_java_mirror(mirror);
951
952 // Set the module field in the java_lang_Class instance. This must be done
953 // after the mirror is set.
954 set_mirror_module_field(k, mirror, module, THREAD);
955
956 if (comp_mirror() != NULL) {
957 // Set after k->java_mirror() is published, because compiled code running
958 // concurrently doesn't expect a k to have a null java_mirror.
959 release_set_array_klass(comp_mirror(), k);
960 }
961
962 if (k->is_value()) {
963 // create the secondary mirror for value class
964 oop value_mirror_oop = create_value_mirror(k, mirror, CHECK);
965 set_box_mirror(mirror(), mirror());
966 set_value_mirror(mirror(), value_mirror_oop);
967 }
968 } else {
969 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
970 fixup_mirror_list()->push(k);
971 }
972 }
973
974 // Create the secondary mirror for value type. Sets all the fields of this java.lang.Class
975 // instance with the same value as the primary mirror except signers.
976 // Class::setSigners and getSigners will use the primary mirror when passed to the JVM.
977 oop java_lang_Class::create_value_mirror(Klass* k, Handle mirror, TRAPS) {
978 // Allocate mirror (java.lang.Class instance)
979 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0);
980 Handle value_mirror(THREAD, mirror_oop);
981
982 java_lang_Class::set_klass(value_mirror(), k);
983 java_lang_Class::set_static_oop_field_count(value_mirror(), static_oop_field_count(mirror()));
984 // ## do we need to set init lock?
985 java_lang_Class::set_init_lock(value_mirror(), init_lock(mirror()));
986
987 if (k->is_array_klass()) {
988 assert(component_mirror(mirror()) != NULL, "must have a mirror");
989 set_component_mirror(value_mirror(), component_mirror(mirror()));
990 }
991
992 set_protection_domain(value_mirror(), protection_domain(mirror()));
993 set_class_loader(value_mirror(), class_loader(mirror()));
994 // ## handle if java.base is not yet defined
995 set_module(value_mirror(), module(mirror()));
996 set_box_mirror(value_mirror(), mirror());
997 set_value_mirror(value_mirror(), value_mirror());
998 return value_mirror();
999 }
1000
1001 #if INCLUDE_CDS_JAVA_HEAP
1002 // Clears mirror fields. Static final fields with initial values are reloaded
1003 // from constant pool. The object identity hash is in the object header and is
1004 // not affected.
1005 class ResetMirrorField: public FieldClosure {
1006 private:
1007 Handle _m;
1008
1009 public:
1010 ResetMirrorField(Handle mirror) : _m(mirror) {}
1011
1012 void do_field(fieldDescriptor* fd) {
1013 assert(DumpSharedSpaces, "dump time only");
1014 assert(_m.not_null(), "Mirror cannot be NULL");
1015
1016 if (fd->is_static() && fd->has_initial_value()) {
1017 initialize_static_field(fd, _m, Thread::current());
1018 return;
1019 }
1020
1021 BasicType ft = fd->field_type();
1022 switch (ft) {
1023 case T_BYTE:
1024 _m()->byte_field_put(fd->offset(), 0);
1025 break;
1026 case T_CHAR:
1027 _m()->char_field_put(fd->offset(), 0);
1028 break;
1029 case T_DOUBLE:
1030 _m()->double_field_put(fd->offset(), 0);
1031 break;
1032 case T_FLOAT:
1033 _m()->float_field_put(fd->offset(), 0);
1034 break;
1035 case T_INT:
1036 _m()->int_field_put(fd->offset(), 0);
1037 break;
1038 case T_LONG:
1039 _m()->long_field_put(fd->offset(), 0);
1040 break;
1041 case T_SHORT:
1042 _m()->short_field_put(fd->offset(), 0);
1043 break;
1044 case T_BOOLEAN:
1045 _m()->bool_field_put(fd->offset(), false);
1046 break;
1047 case T_ARRAY:
1048 case T_OBJECT: {
1049 // It might be useful to cache the String field, but
1050 // for now just clear out any reference field
1051 oop o = _m()->obj_field(fd->offset());
1052 _m()->obj_field_put(fd->offset(), NULL);
1053 break;
1054 }
1055 default:
1056 ShouldNotReachHere();
1057 break;
1058 }
1059 }
1060 };
1061
1062 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1063 assert(HeapShared::is_heap_object_archiving_allowed(),
1064 "HeapShared::is_heap_object_archiving_allowed() must be true");
1065
1066 for (int t = 0; t <= T_VOID; t++) {
1067 oop m = Universe::_mirrors[t];
1068 if (m != NULL) {
1069 // Update the field at _array_klass_offset to point to the relocated array klass.
1070 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1071 assert(archived_m != NULL, "sanity");
1072 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1073 assert(ak != NULL || t == T_VOID, "should not be NULL");
1074 if (ak != NULL) {
1075 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1076 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1077 }
1078
1079 // Clear the fields. Just to be safe
1080 Klass *k = m->klass();
1081 Handle archived_mirror_h(THREAD, archived_m);
1082 ResetMirrorField reset(archived_mirror_h);
1083 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1084
1085 log_trace(cds, heap, mirror)(
1086 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1087 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1088
1089 Universe::_mirrors[t] = archived_m;
1090 }
1091 }
1092
1093 assert(Universe::_mirrors[T_INT] != NULL &&
1094 Universe::_mirrors[T_FLOAT] != NULL &&
1095 Universe::_mirrors[T_DOUBLE] != NULL &&
1096 Universe::_mirrors[T_BYTE] != NULL &&
1097 Universe::_mirrors[T_BOOLEAN] != NULL &&
1098 Universe::_mirrors[T_CHAR] != NULL &&
1099 Universe::_mirrors[T_LONG] != NULL &&
1100 Universe::_mirrors[T_SHORT] != NULL &&
1101 Universe::_mirrors[T_VOID] != NULL, "sanity");
1102
1103 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1104 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1105 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1106 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1107 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1108 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1109 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1110 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1111 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1112 }
1113
1114 //
1115 // After the mirror object is successfully archived, the archived
1116 // klass is set with _has_archived_raw_mirror flag.
1117 //
1118 // The _has_archived_raw_mirror flag is cleared at runtime when the
1119 // archived mirror is restored. If archived java heap data cannot
1120 // be used at runtime, new mirror object is created for the shared
1121 // class. The _has_archived_raw_mirror is cleared also during the process.
1122 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1123 assert(HeapShared::is_heap_object_archiving_allowed(),
1124 "HeapShared::is_heap_object_archiving_allowed() must be true");
1125
1126 // Mirror is already archived
1127 if (k->has_raw_archived_mirror()) {
1128 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1129 return k->archived_java_mirror_raw();
1130 }
1131
1132 // No mirror
1133 oop mirror = k->java_mirror();
1134 if (mirror == NULL) {
1135 return NULL;
1136 }
1137
1138 if (k->is_instance_klass()) {
1139 InstanceKlass *ik = InstanceKlass::cast(k);
1140 assert(ik->signers() == NULL, "class with signer should have been excluded");
1141
1142 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1143 ik->is_shared_app_class())) {
1144 // Archiving mirror for classes from non-builtin loaders is not
1145 // supported. Clear the _java_mirror within the archived class.
1146 k->set_java_mirror_handle(NULL);
1147 return NULL;
1148 }
1149 }
1150
1151 // Now start archiving the mirror object
1152 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1153 if (archived_mirror == NULL) {
1154 return NULL;
1155 }
1156
1157 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1158 if (archived_mirror == NULL) {
1159 return NULL;
1160 }
1161
1162 k->set_archived_java_mirror_raw(archived_mirror);
1163
1164 k->set_has_raw_archived_mirror();
1165
1166 ResourceMark rm;
1167 log_trace(cds, heap, mirror)(
1168 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1169 k->external_name(), p2i(mirror), p2i(archived_mirror));
1170
1171 return archived_mirror;
1172 }
1173
1174 // The process is based on create_mirror().
1175 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1176 oop archived_mirror,
1177 Thread *THREAD) {
1178 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1179 // to archived metadata and objects below.
1180 Klass *c = archived_mirror->klass();
1181 Handle archived_mirror_h(THREAD, archived_mirror);
1182 ResetMirrorField reset(archived_mirror_h);
1183 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1184
1185 if (k->is_array_klass()) {
1186 oop archived_comp_mirror;
1187 if (k->is_typeArray_klass()) {
1188 // The primitive type mirrors are already archived. Get the archived mirror.
1189 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1190 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1191 assert(archived_comp_mirror != NULL, "Must be");
1192 } else {
1193 assert(k->is_objArray_klass(), "Must be");
1194 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1195 assert(element_klass != NULL, "Must have an element klass");
1196 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1197 if (archived_comp_mirror == NULL) {
1198 return NULL;
1199 }
1200 }
1201 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1202 } else {
1203 assert(k->is_instance_klass(), "Must be");
1204
1205 // Reset local static fields in the mirror
1206 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1207
1208 java_lang_Class:set_init_lock(archived_mirror, NULL);
1209
1210 set_protection_domain(archived_mirror, NULL);
1211 }
1212
1213 // clear class loader and mirror_module_field
1214 set_class_loader(archived_mirror, NULL);
1215 set_module(archived_mirror, NULL);
1216
1217 // The archived mirror's field at _klass_offset is still pointing to the original
1218 // klass. Updated the field in the archived mirror to point to the relocated
1219 // klass in the archive.
1220 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1221 log_debug(cds, heap, mirror)(
1222 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1223 p2i(as_Klass(mirror)), p2i(reloc_k));
1224 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1225
1226 // The field at _array_klass_offset is pointing to the original one dimension
1227 // higher array klass if exists. Relocate the pointer.
1228 Klass *arr = array_klass_acquire(mirror);
1229 if (arr != NULL) {
1230 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1231 log_debug(cds, heap, mirror)(
1232 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1233 p2i(arr), p2i(reloc_arr));
1234 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1235 }
1236 return archived_mirror;
1237 }
1238
1239 // Returns true if the mirror is updated, false if no archived mirror
1240 // data is present. After the archived mirror object is restored, the
1241 // shared klass' _has_raw_archived_mirror flag is cleared.
1242 bool java_lang_Class::restore_archived_mirror(Klass *k,
1243 Handle class_loader, Handle module,
1244 Handle protection_domain, TRAPS) {
1245 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1246 // see more details in SystemDictionary::resolve_well_known_classes().
1247 if (!SystemDictionary::Class_klass_loaded()) {
1248 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1249 fixup_mirror_list()->push(k);
1250 return true;
1251 }
1252
1253 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1254
1255 if (m == NULL) {
1256 return false;
1257 }
1258
1259 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1260
1261 // mirror is archived, restore
1262 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1263 Handle mirror(THREAD, m);
1264
1265 if (!k->is_array_klass()) {
1266 // - local static final fields with initial values were initialized at dump time
1267
1268 // create the init_lock
1269 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1270 set_init_lock(mirror(), r);
1271
1272 if (protection_domain.not_null()) {
1273 set_protection_domain(mirror(), protection_domain());
1274 }
1275 }
1276
1277 assert(class_loader() == k->class_loader(), "should be same");
1278 if (class_loader.not_null()) {
1279 set_class_loader(mirror(), class_loader());
1280 }
1281
1282 k->set_java_mirror(mirror);
1283 k->clear_has_raw_archived_mirror();
1284
1285 set_mirror_module_field(k, mirror, module, THREAD);
1286
1287 ResourceMark rm;
1288 log_trace(cds, heap, mirror)(
1289 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1290
1291 return true;
1292 }
1293 #endif // INCLUDE_CDS_JAVA_HEAP
1294
1295 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1296 assert(_module_offset != 0, "must have been computed already");
1297 java_lang_Class::set_module(k->java_mirror(), module());
1298 }
1299
1300 int java_lang_Class::oop_size(oop java_class) {
1301 assert(_oop_size_offset != 0, "must be set");
1302 int size = java_class->int_field(_oop_size_offset);
1303 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1304 return size;
1305 }
1306
1307
1308 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1309 assert(_oop_size_offset != 0, "must be set");
1310 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1311 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1312 }
1313
1314 int java_lang_Class::static_oop_field_count(oop java_class) {
1315 assert(_static_oop_field_count_offset != 0, "must be set");
1316 return java_class->int_field(_static_oop_field_count_offset);
1317 }
1318
1319 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1320 assert(_static_oop_field_count_offset != 0, "must be set");
1321 return java_class->int_field_raw(_static_oop_field_count_offset);
1322 }
1323
1324 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1325 assert(_static_oop_field_count_offset != 0, "must be set");
1326 java_class->int_field_put(_static_oop_field_count_offset, size);
1327 }
1328
1329 oop java_lang_Class::protection_domain(oop java_class) {
1330 assert(_protection_domain_offset != 0, "must be set");
1331 return java_class->obj_field(_protection_domain_offset);
1332 }
1333 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1334 assert(_protection_domain_offset != 0, "must be set");
1335 java_class->obj_field_put(_protection_domain_offset, pd);
1336 }
1337
1338 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1339 assert(_component_mirror_offset != 0, "must be set");
1340 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1341 }
1342 oop java_lang_Class::component_mirror(oop java_class) {
1343 assert(_component_mirror_offset != 0, "must be set");
1344 return java_class->obj_field(_component_mirror_offset);
1345 }
1346
1347 oop java_lang_Class::init_lock(oop java_class) {
1348 assert(_init_lock_offset != 0, "must be set");
1349 return java_class->obj_field(_init_lock_offset);
1350 }
1351 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1352 assert(_init_lock_offset != 0, "must be set");
1353 java_class->obj_field_put(_init_lock_offset, init_lock);
1354 }
1355
1356 objArrayOop java_lang_Class::signers(oop java_class) {
1357 assert(_signers_offset != 0, "must be set");
1358 return (objArrayOop)java_class->obj_field(_signers_offset);
1359 }
1360 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1361 assert(_signers_offset != 0, "must be set");
1362 java_class->obj_field_put(_signers_offset, (oop)signers);
1363 }
1364
1365
1366 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1367 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1368 if (_class_loader_offset != 0) {
1369 java_class->obj_field_put(_class_loader_offset, loader);
1370 }
1371 }
1372
1373 oop java_lang_Class::class_loader(oop java_class) {
1374 assert(_class_loader_offset != 0, "must be set");
1375 return java_class->obj_field(_class_loader_offset);
1376 }
1377
1378 oop java_lang_Class::module(oop java_class) {
1379 assert(_module_offset != 0, "must be set");
1380 return java_class->obj_field(_module_offset);
1381 }
1382
1383 void java_lang_Class::set_module(oop java_class, oop module) {
1384 assert(_module_offset != 0, "must be set");
1385 java_class->obj_field_put(_module_offset, module);
1386 }
1387
1388 oop java_lang_Class::name(Handle java_class, TRAPS) {
1389 assert(_name_offset != 0, "must be set");
1390 oop o = java_class->obj_field(_name_offset);
1391 if (o == NULL) {
1392 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1393 java_class->obj_field_put(_name_offset, o);
1394 }
1395 return o;
1396 }
1397
1398 oop java_lang_Class::source_file(oop java_class) {
1399 assert(_source_file_offset != 0, "must be set");
1400 return java_class->obj_field(_source_file_offset);
1401 }
1402
1403 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1404 assert(_source_file_offset != 0, "must be set");
1405 java_class->obj_field_put(_source_file_offset, source_file);
1406 }
1407
1408 oop java_lang_Class::value_mirror(oop java_class) {
1409 assert(_value_mirror_offset != 0, "must be set");
1410 return java_class->obj_field(_value_mirror_offset);
1411 }
1412
1413 void java_lang_Class::set_value_mirror(oop java_class, oop mirror) {
1414 assert(_value_mirror_offset != 0, "must be set");
1415 java_class->obj_field_put(_value_mirror_offset, mirror);
1416 }
1417
1418 oop java_lang_Class::box_mirror(oop java_class) {
1419 assert(_box_mirror_offset != 0, "must be set");
1420 return java_class->obj_field(_box_mirror_offset);
1421 }
1422
1423 void java_lang_Class::set_box_mirror(oop java_class, oop mirror) {
1424 assert(_box_mirror_offset != 0, "must be set");
1425 java_class->obj_field_put(_box_mirror_offset, mirror);
1426 }
1427
1428 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1429 // This should be improved by adding a field at the Java level or by
1430 // introducing a new VM klass (see comment in ClassFileParser)
1431 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1432 if (type != T_VOID) {
1433 Klass* aklass = Universe::typeArrayKlassObj(type);
1434 assert(aklass != NULL, "correct bootstrap");
1435 release_set_array_klass(java_class, aklass);
1436 }
1437 #ifdef ASSERT
1438 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1439 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1440 #endif
1441 return java_class;
1442 }
1443
1444
1445 Klass* java_lang_Class::as_Klass(oop java_class) {
1446 //%note memory_2
1447 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1448 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1449 assert(k == NULL || k->is_klass(), "type check");
1450 return k;
1451 }
1452
1453 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1454 //%note memory_2
1455 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1456 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1457 assert(k == NULL || k->is_klass(), "type check");
1458 return k;
1459 }
1460
1461
1462 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1463 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1464 java_class->metadata_field_put(_klass_offset, klass);
1465 }
1466
1467
1468 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1469 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1470 Symbol* name = NULL;
1471 bool is_instance = false;
1472 bool is_value = false;
1473 if (is_primitive(java_class)) {
1474 name = vmSymbols::type_signature(primitive_type(java_class));
1475 } else {
1476 Klass* k = as_Klass(java_class);
1477 is_instance = k->is_instance_klass();
1478 is_value = k->is_value();
1479 name = k->name();
1480 }
1481 if (name == NULL) {
1482 st->print("<null>");
1483 return;
1484 }
1485 if (is_instance) {
1486 if (is_value && (java_class == value_mirror(java_class))) {
1487 st->print("Q");
1488 } else {
1489 st->print("L");
1490 }
1491 }
1492 st->write((char*) name->base(), (int) name->utf8_length());
1493 if (is_instance) st->print(";");
1494 }
1495
1496 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1497 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1498 Symbol* name;
1499 if (is_primitive(java_class)) {
1500 name = vmSymbols::type_signature(primitive_type(java_class));
1501 // Because this can create a new symbol, the caller has to decrement
1502 // the refcount, so make adjustment here and below for symbols returned
1503 // that are not created or incremented due to a successful lookup.
1504 name->increment_refcount();
1505 } else {
1506 Klass* k = as_Klass(java_class);
1507 if (!k->is_instance_klass()) {
1508 name = k->name();
1509 name->increment_refcount();
1510 } else {
1511 ResourceMark rm;
1512 const char* sigstr;
1513 if (k->is_value()) {
1514 char c = (java_class == value_mirror(java_class)) ? 'Q' : 'L';
1515 sigstr = InstanceKlass::cast(k)->signature_name_of(c);
1516 } else {
1517 sigstr = k->signature_name();
1518 }
1519 int siglen = (int) strlen(sigstr);
1520 if (!intern_if_not_found) {
1521 name = SymbolTable::probe(sigstr, siglen);
1522 } else {
1523 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1524 }
1525 }
1526 }
1527 return name;
1528 }
1529
1530 // Returns the Java name for this Java mirror (Resource allocated)
1531 // See Klass::external_name().
1532 // For primitive type Java mirrors, its type name is returned.
1533 const char* java_lang_Class::as_external_name(oop java_class) {
1534 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1535 const char* name = NULL;
1536 if (is_primitive(java_class)) {
1537 name = type2name(primitive_type(java_class));
1538 } else {
1539 name = as_Klass(java_class)->external_name();
1540 }
1541 if (name == NULL) {
1542 name = "<null>";
1543 }
1544 return name;
1545 }
1546
1547 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1548 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1549 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1550 return k;
1551 }
1552
1553
1554 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1555 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1556 java_class->release_metadata_field_put(_array_klass_offset, klass);
1557 }
1558
1559
1560 BasicType java_lang_Class::primitive_type(oop java_class) {
1561 assert(java_lang_Class::is_primitive(java_class), "just checking");
1562 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1563 BasicType type = T_VOID;
1564 if (ak != NULL) {
1565 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1566 type = ArrayKlass::cast(ak)->element_type();
1567 } else {
1568 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1569 }
1570 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1571 return type;
1572 }
1573
1574 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1575 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1576 if (is_primitive(java_class)) {
1577 if (reference_klass != NULL)
1578 (*reference_klass) = NULL;
1579 return primitive_type(java_class);
1580 } else {
1581 if (reference_klass != NULL)
1582 (*reference_klass) = as_Klass(java_class);
1583 return T_OBJECT;
1584 }
1585 }
1586
1587
1588 oop java_lang_Class::primitive_mirror(BasicType t) {
1589 oop mirror = Universe::java_mirror(t);
1590 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1591 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1592 return mirror;
1593 }
1594
1595 bool java_lang_Class::offsets_computed = false;
1596 int java_lang_Class::classRedefinedCount_offset = -1;
1597
1598 #define CLASS_FIELDS_DO(macro) \
1599 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1600 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1601 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1602 macro(_module_offset, k, "module", module_signature, false); \
1603 macro(_name_offset, k, "name", string_signature, false); \
1604 macro(_box_mirror_offset, k, "boxType", class_signature, false); \
1605 macro(_value_mirror_offset, k, "valueType", class_signature, false); \
1606
1607 void java_lang_Class::compute_offsets() {
1608 if (offsets_computed) {
1609 return;
1610 }
1611
1612 offsets_computed = true;
1613
1614 InstanceKlass* k = SystemDictionary::Class_klass();
1615 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1616
1617 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1618 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1619 // GC treats them the same.
1620 _init_lock_offset = _component_mirror_offset;
1621
1622 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1623 }
1624
1625 #if INCLUDE_CDS
1626 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1627 f->do_u4((u4*)&offsets_computed);
1628 f->do_u4((u4*)&_init_lock_offset);
1629
1630 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1631
1632 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1633 }
1634 #endif
1635
1636 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1637 if (classRedefinedCount_offset == -1) {
1638 // If we don't have an offset for it then just return -1 as a marker.
1639 return -1;
1640 }
1641
1642 return the_class_mirror->int_field(classRedefinedCount_offset);
1643 }
1644
1645 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1646 if (classRedefinedCount_offset == -1) {
1647 // If we don't have an offset for it then nothing to set.
1648 return;
1649 }
1650
1651 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1652 }
1653
1654
1655 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1656 // platform thread structure, and a eetop offset which was used for thread
1657 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1658 // merged, so in the HotSpot VM we just use the eetop field for the thread
1659 // instead of the privateInfo_offset.
1660 //
1661 // Note: The stackSize field is only present starting in 1.4.
1662
1663 int java_lang_Thread::_name_offset = 0;
1664 int java_lang_Thread::_group_offset = 0;
1665 int java_lang_Thread::_contextClassLoader_offset = 0;
1666 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1667 int java_lang_Thread::_priority_offset = 0;
1668 int java_lang_Thread::_eetop_offset = 0;
1669 int java_lang_Thread::_daemon_offset = 0;
1670 int java_lang_Thread::_stillborn_offset = 0;
1671 int java_lang_Thread::_stackSize_offset = 0;
1672 int java_lang_Thread::_tid_offset = 0;
1673 int java_lang_Thread::_thread_status_offset = 0;
1674 int java_lang_Thread::_park_blocker_offset = 0;
1675 int java_lang_Thread::_park_event_offset = 0 ;
1676
1677 #define THREAD_FIELDS_DO(macro) \
1678 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1679 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1680 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1681 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1682 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1683 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1684 macro(_eetop_offset, k, "eetop", long_signature, false); \
1685 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1686 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1687 macro(_tid_offset, k, "tid", long_signature, false); \
1688 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1689 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1690 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1691
1692 void java_lang_Thread::compute_offsets() {
1693 assert(_group_offset == 0, "offsets should be initialized only once");
1694
1695 InstanceKlass* k = SystemDictionary::Thread_klass();
1696 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1697 }
1698
1699 #if INCLUDE_CDS
1700 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1701 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1702 }
1703 #endif
1704
1705 JavaThread* java_lang_Thread::thread(oop java_thread) {
1706 return (JavaThread*)java_thread->address_field(_eetop_offset);
1707 }
1708
1709
1710 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1711 java_thread->address_field_put(_eetop_offset, (address)thread);
1712 }
1713
1714
1715 oop java_lang_Thread::name(oop java_thread) {
1716 return java_thread->obj_field(_name_offset);
1717 }
1718
1719
1720 void java_lang_Thread::set_name(oop java_thread, oop name) {
1721 java_thread->obj_field_put(_name_offset, name);
1722 }
1723
1724
1725 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1726 return (ThreadPriority)java_thread->int_field(_priority_offset);
1727 }
1728
1729
1730 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1731 java_thread->int_field_put(_priority_offset, priority);
1732 }
1733
1734
1735 oop java_lang_Thread::threadGroup(oop java_thread) {
1736 return java_thread->obj_field(_group_offset);
1737 }
1738
1739
1740 bool java_lang_Thread::is_stillborn(oop java_thread) {
1741 return java_thread->bool_field(_stillborn_offset) != 0;
1742 }
1743
1744
1745 // We never have reason to turn the stillborn bit off
1746 void java_lang_Thread::set_stillborn(oop java_thread) {
1747 java_thread->bool_field_put(_stillborn_offset, true);
1748 }
1749
1750
1751 bool java_lang_Thread::is_alive(oop java_thread) {
1752 JavaThread* thr = java_lang_Thread::thread(java_thread);
1753 return (thr != NULL);
1754 }
1755
1756
1757 bool java_lang_Thread::is_daemon(oop java_thread) {
1758 return java_thread->bool_field(_daemon_offset) != 0;
1759 }
1760
1761
1762 void java_lang_Thread::set_daemon(oop java_thread) {
1763 java_thread->bool_field_put(_daemon_offset, true);
1764 }
1765
1766 oop java_lang_Thread::context_class_loader(oop java_thread) {
1767 return java_thread->obj_field(_contextClassLoader_offset);
1768 }
1769
1770 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1771 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1772 }
1773
1774
1775 jlong java_lang_Thread::stackSize(oop java_thread) {
1776 if (_stackSize_offset > 0) {
1777 return java_thread->long_field(_stackSize_offset);
1778 } else {
1779 return 0;
1780 }
1781 }
1782
1783 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1784 void java_lang_Thread::set_thread_status(oop java_thread,
1785 java_lang_Thread::ThreadStatus status) {
1786 // The threadStatus is only present starting in 1.5
1787 if (_thread_status_offset > 0) {
1788 java_thread->int_field_put(_thread_status_offset, status);
1789 }
1790 }
1791
1792 // Read thread status value from threadStatus field in java.lang.Thread java class.
1793 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1794 // Make sure the caller is operating on behalf of the VM or is
1795 // running VM code (state == _thread_in_vm).
1796 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1797 JavaThread::current()->thread_state() == _thread_in_vm,
1798 "Java Thread is not running in vm");
1799 // The threadStatus is only present starting in 1.5
1800 if (_thread_status_offset > 0) {
1801 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1802 } else {
1803 // All we can easily figure out is if it is alive, but that is
1804 // enough info for a valid unknown status.
1805 // These aren't restricted to valid set ThreadStatus values, so
1806 // use JVMTI values and cast.
1807 JavaThread* thr = java_lang_Thread::thread(java_thread);
1808 if (thr == NULL) {
1809 // the thread hasn't run yet or is in the process of exiting
1810 return NEW;
1811 }
1812 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1813 }
1814 }
1815
1816
1817 jlong java_lang_Thread::thread_id(oop java_thread) {
1818 // The thread ID field is only present starting in 1.5
1819 if (_tid_offset > 0) {
1820 return java_thread->long_field(_tid_offset);
1821 } else {
1822 return 0;
1823 }
1824 }
1825
1826 oop java_lang_Thread::park_blocker(oop java_thread) {
1827 assert(JDK_Version::current().supports_thread_park_blocker() &&
1828 _park_blocker_offset != 0, "Must support parkBlocker field");
1829
1830 if (_park_blocker_offset > 0) {
1831 return java_thread->obj_field(_park_blocker_offset);
1832 }
1833
1834 return NULL;
1835 }
1836
1837 jlong java_lang_Thread::park_event(oop java_thread) {
1838 if (_park_event_offset > 0) {
1839 return java_thread->long_field(_park_event_offset);
1840 }
1841 return 0;
1842 }
1843
1844 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1845 if (_park_event_offset > 0) {
1846 java_thread->long_field_put(_park_event_offset, ptr);
1847 return true;
1848 }
1849 return false;
1850 }
1851
1852
1853 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1854 assert(_thread_status_offset != 0, "Must have thread status");
1855 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1856 switch (status) {
1857 case NEW : return "NEW";
1858 case RUNNABLE : return "RUNNABLE";
1859 case SLEEPING : return "TIMED_WAITING (sleeping)";
1860 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1861 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1862 case PARKED : return "WAITING (parking)";
1863 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1864 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1865 case TERMINATED : return "TERMINATED";
1866 default : return "UNKNOWN";
1867 };
1868 }
1869 int java_lang_ThreadGroup::_parent_offset = 0;
1870 int java_lang_ThreadGroup::_name_offset = 0;
1871 int java_lang_ThreadGroup::_threads_offset = 0;
1872 int java_lang_ThreadGroup::_groups_offset = 0;
1873 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1874 int java_lang_ThreadGroup::_destroyed_offset = 0;
1875 int java_lang_ThreadGroup::_daemon_offset = 0;
1876 int java_lang_ThreadGroup::_nthreads_offset = 0;
1877 int java_lang_ThreadGroup::_ngroups_offset = 0;
1878
1879 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1880 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1881 return java_thread_group->obj_field(_parent_offset);
1882 }
1883
1884 // ("name as oop" accessor is not necessary)
1885
1886 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1887 oop name = java_thread_group->obj_field(_name_offset);
1888 // ThreadGroup.name can be null
1889 if (name != NULL) {
1890 return java_lang_String::as_utf8_string(name);
1891 }
1892 return NULL;
1893 }
1894
1895 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1896 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1897 return java_thread_group->int_field(_nthreads_offset);
1898 }
1899
1900 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1901 oop threads = java_thread_group->obj_field(_threads_offset);
1902 assert(threads != NULL, "threadgroups should have threads");
1903 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1904 return objArrayOop(threads);
1905 }
1906
1907 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1908 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1909 return java_thread_group->int_field(_ngroups_offset);
1910 }
1911
1912 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1913 oop groups = java_thread_group->obj_field(_groups_offset);
1914 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1915 return objArrayOop(groups);
1916 }
1917
1918 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1919 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1920 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1921 }
1922
1923 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1924 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1925 return java_thread_group->bool_field(_destroyed_offset) != 0;
1926 }
1927
1928 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1929 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1930 return java_thread_group->bool_field(_daemon_offset) != 0;
1931 }
1932
1933 #define THREADGROUP_FIELDS_DO(macro) \
1934 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1935 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1936 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1937 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1938 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1939 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1940 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1941 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1942 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1943
1944 void java_lang_ThreadGroup::compute_offsets() {
1945 assert(_parent_offset == 0, "offsets should be initialized only once");
1946
1947 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1948 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1949 }
1950
1951 #if INCLUDE_CDS
1952 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1953 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1954 }
1955 #endif
1956
1957 #define THROWABLE_FIELDS_DO(macro) \
1958 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1959 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1960 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1961 macro(depth_offset, k, "depth", int_signature, false); \
1962 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1963
1964 void java_lang_Throwable::compute_offsets() {
1965 InstanceKlass* k = SystemDictionary::Throwable_klass();
1966 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1967 }
1968
1969 #if INCLUDE_CDS
1970 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1971 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1972 }
1973 #endif
1974
1975 oop java_lang_Throwable::unassigned_stacktrace() {
1976 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1977 oop base = ik->static_field_base_raw();
1978 return base->obj_field(static_unassigned_stacktrace_offset);
1979 }
1980
1981 oop java_lang_Throwable::backtrace(oop throwable) {
1982 return throwable->obj_field_acquire(backtrace_offset);
1983 }
1984
1985
1986 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1987 throwable->release_obj_field_put(backtrace_offset, value);
1988 }
1989
1990 int java_lang_Throwable::depth(oop throwable) {
1991 return throwable->int_field(depth_offset);
1992 }
1993
1994 void java_lang_Throwable::set_depth(oop throwable, int value) {
1995 throwable->int_field_put(depth_offset, value);
1996 }
1997
1998 oop java_lang_Throwable::message(oop throwable) {
1999 return throwable->obj_field(detailMessage_offset);
2000 }
2001
2002
2003 // Return Symbol for detailed_message or NULL
2004 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2005 PRESERVE_EXCEPTION_MARK; // Keep original exception
2006 oop detailed_message = java_lang_Throwable::message(throwable);
2007 if (detailed_message != NULL) {
2008 return java_lang_String::as_symbol(detailed_message, THREAD);
2009 }
2010 return NULL;
2011 }
2012
2013 void java_lang_Throwable::set_message(oop throwable, oop value) {
2014 throwable->obj_field_put(detailMessage_offset, value);
2015 }
2016
2017
2018 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2019 throwable->obj_field_put(stackTrace_offset, st_element_array);
2020 }
2021
2022 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2023 set_stacktrace(throwable, NULL);
2024 }
2025
2026
2027 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2028 ResourceMark rm;
2029 Klass* k = throwable->klass();
2030 assert(k != NULL, "just checking");
2031 st->print("%s", k->external_name());
2032 oop msg = message(throwable);
2033 if (msg != NULL) {
2034 st->print(": %s", java_lang_String::as_utf8_string(msg));
2035 }
2036 }
2037
2038 // After this many redefines, the stack trace is unreliable.
2039 const int MAX_VERSION = USHRT_MAX;
2040
2041 static inline bool version_matches(Method* method, int version) {
2042 assert(version < MAX_VERSION, "version is too big");
2043 return method != NULL && (method->constants()->version() == version);
2044 }
2045
2046
2047 // This class provides a simple wrapper over the internal structure of
2048 // exception backtrace to insulate users of the backtrace from needing
2049 // to know what it looks like.
2050 class BacktraceBuilder: public StackObj {
2051 friend class BacktraceIterator;
2052 private:
2053 Handle _backtrace;
2054 objArrayOop _head;
2055 typeArrayOop _methods;
2056 typeArrayOop _bcis;
2057 objArrayOop _mirrors;
2058 typeArrayOop _names; // needed to insulate method name against redefinition
2059 int _index;
2060 NoSafepointVerifier _nsv;
2061
2062 enum {
2063 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2064 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2065 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2066 trace_names_offset = java_lang_Throwable::trace_names_offset,
2067 trace_next_offset = java_lang_Throwable::trace_next_offset,
2068 trace_size = java_lang_Throwable::trace_size,
2069 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2070 };
2071
2072 // get info out of chunks
2073 static typeArrayOop get_methods(objArrayHandle chunk) {
2074 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2075 assert(methods != NULL, "method array should be initialized in backtrace");
2076 return methods;
2077 }
2078 static typeArrayOop get_bcis(objArrayHandle chunk) {
2079 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2080 assert(bcis != NULL, "bci array should be initialized in backtrace");
2081 return bcis;
2082 }
2083 static objArrayOop get_mirrors(objArrayHandle chunk) {
2084 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2085 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2086 return mirrors;
2087 }
2088 static typeArrayOop get_names(objArrayHandle chunk) {
2089 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2090 assert(names != NULL, "names array should be initialized in backtrace");
2091 return names;
2092 }
2093
2094 public:
2095
2096 // constructor for new backtrace
2097 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2098 expand(CHECK);
2099 _backtrace = Handle(THREAD, _head);
2100 _index = 0;
2101 }
2102
2103 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2104 _methods = get_methods(backtrace);
2105 _bcis = get_bcis(backtrace);
2106 _mirrors = get_mirrors(backtrace);
2107 _names = get_names(backtrace);
2108 assert(_methods->length() == _bcis->length() &&
2109 _methods->length() == _mirrors->length() &&
2110 _mirrors->length() == _names->length(),
2111 "method and source information arrays should match");
2112
2113 // head is the preallocated backtrace
2114 _head = backtrace();
2115 _backtrace = Handle(thread, _head);
2116 _index = 0;
2117 }
2118
2119 void expand(TRAPS) {
2120 objArrayHandle old_head(THREAD, _head);
2121 PauseNoSafepointVerifier pnsv(&_nsv);
2122
2123 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2124 objArrayHandle new_head(THREAD, head);
2125
2126 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2127 typeArrayHandle new_methods(THREAD, methods);
2128
2129 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2130 typeArrayHandle new_bcis(THREAD, bcis);
2131
2132 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2133 objArrayHandle new_mirrors(THREAD, mirrors);
2134
2135 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2136 typeArrayHandle new_names(THREAD, names);
2137
2138 if (!old_head.is_null()) {
2139 old_head->obj_at_put(trace_next_offset, new_head());
2140 }
2141 new_head->obj_at_put(trace_methods_offset, new_methods());
2142 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2143 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2144 new_head->obj_at_put(trace_names_offset, new_names());
2145
2146 _head = new_head();
2147 _methods = new_methods();
2148 _bcis = new_bcis();
2149 _mirrors = new_mirrors();
2150 _names = new_names();
2151 _index = 0;
2152 }
2153
2154 oop backtrace() {
2155 return _backtrace();
2156 }
2157
2158 inline void push(Method* method, int bci, TRAPS) {
2159 // Smear the -1 bci to 0 since the array only holds unsigned
2160 // shorts. The later line number lookup would just smear the -1
2161 // to a 0 even if it could be recorded.
2162 if (bci == SynchronizationEntryBCI) bci = 0;
2163
2164 if (_index >= trace_chunk_size) {
2165 methodHandle mhandle(THREAD, method);
2166 expand(CHECK);
2167 method = mhandle();
2168 }
2169
2170 _methods->ushort_at_put(_index, method->orig_method_idnum());
2171 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2172
2173 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2174 // klass owning the symbols alive so their refcounts aren't decremented.
2175 Symbol* name = method->name();
2176 _names->symbol_at_put(_index, name);
2177
2178 // We need to save the mirrors in the backtrace to keep the class
2179 // from being unloaded while we still have this stack trace.
2180 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2181 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2182 _index++;
2183 }
2184
2185 };
2186
2187 struct BacktraceElement : public StackObj {
2188 int _method_id;
2189 int _bci;
2190 int _version;
2191 Symbol* _name;
2192 Handle _mirror;
2193 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2194 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2195 };
2196
2197 class BacktraceIterator : public StackObj {
2198 int _index;
2199 objArrayHandle _result;
2200 objArrayHandle _mirrors;
2201 typeArrayHandle _methods;
2202 typeArrayHandle _bcis;
2203 typeArrayHandle _names;
2204
2205 void init(objArrayHandle result, Thread* thread) {
2206 // Get method id, bci, version and mirror from chunk
2207 _result = result;
2208 if (_result.not_null()) {
2209 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2210 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2211 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2212 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2213 _index = 0;
2214 }
2215 }
2216 public:
2217 BacktraceIterator(objArrayHandle result, Thread* thread) {
2218 init(result, thread);
2219 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2220 }
2221
2222 BacktraceElement next(Thread* thread) {
2223 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2224 _methods->ushort_at(_index),
2225 Backtrace::version_at(_bcis->int_at(_index)),
2226 Backtrace::bci_at(_bcis->int_at(_index)),
2227 _names->symbol_at(_index));
2228 _index++;
2229
2230 if (_index >= java_lang_Throwable::trace_chunk_size) {
2231 int next_offset = java_lang_Throwable::trace_next_offset;
2232 // Get next chunk
2233 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2234 init(result, thread);
2235 }
2236 return e;
2237 }
2238
2239 bool repeat() {
2240 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2241 }
2242 };
2243
2244
2245 // Print stack trace element to resource allocated buffer
2246 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2247 int version, int bci, Symbol* name) {
2248 ResourceMark rm;
2249
2250 // Get strings and string lengths
2251 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2252 const char* klass_name = holder->external_name();
2253 int buf_len = (int)strlen(klass_name);
2254
2255 char* method_name = name->as_C_string();
2256 buf_len += (int)strlen(method_name);
2257
2258 char* source_file_name = NULL;
2259 Symbol* source = Backtrace::get_source_file_name(holder, version);
2260 if (source != NULL) {
2261 source_file_name = source->as_C_string();
2262 buf_len += (int)strlen(source_file_name);
2263 }
2264
2265 char *module_name = NULL, *module_version = NULL;
2266 ModuleEntry* module = holder->module();
2267 if (module->is_named()) {
2268 module_name = module->name()->as_C_string();
2269 buf_len += (int)strlen(module_name);
2270 if (module->version() != NULL) {
2271 module_version = module->version()->as_C_string();
2272 buf_len += (int)strlen(module_version);
2273 }
2274 }
2275
2276 // Allocate temporary buffer with extra space for formatting and line number
2277 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2278
2279 // Print stack trace line in buffer
2280 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2281
2282 // Print module information
2283 if (module_name != NULL) {
2284 if (module_version != NULL) {
2285 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2286 } else {
2287 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2288 }
2289 }
2290
2291 // The method can be NULL if the requested class version is gone
2292 Method* method = holder->method_with_orig_idnum(method_id, version);
2293 if (!version_matches(method, version)) {
2294 strcat(buf, "Redefined)");
2295 } else {
2296 int line_number = Backtrace::get_line_number(method, bci);
2297 if (line_number == -2) {
2298 strcat(buf, "Native Method)");
2299 } else {
2300 if (source_file_name != NULL && (line_number != -1)) {
2301 // Sourcename and linenumber
2302 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2303 } else if (source_file_name != NULL) {
2304 // Just sourcename
2305 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2306 } else {
2307 // Neither sourcename nor linenumber
2308 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2309 }
2310 CompiledMethod* nm = method->code();
2311 if (WizardMode && nm != NULL) {
2312 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2313 }
2314 }
2315 }
2316
2317 st->print_cr("%s", buf);
2318 }
2319
2320 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2321 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2322 int method_id = method->orig_method_idnum();
2323 int version = method->constants()->version();
2324 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2325 }
2326
2327 /**
2328 * Print the throwable message and its stack trace plus all causes by walking the
2329 * cause chain. The output looks the same as of Throwable.printStackTrace().
2330 */
2331 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2332 // First, print the message.
2333 print(throwable(), st);
2334 st->cr();
2335
2336 // Now print the stack trace.
2337 Thread* THREAD = Thread::current();
2338 while (throwable.not_null()) {
2339 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2340 if (result.is_null()) {
2341 st->print_raw_cr("\t<<no stack trace available>>");
2342 return;
2343 }
2344 BacktraceIterator iter(result, THREAD);
2345
2346 while (iter.repeat()) {
2347 BacktraceElement bte = iter.next(THREAD);
2348 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2349 }
2350 {
2351 // Call getCause() which doesn't necessarily return the _cause field.
2352 EXCEPTION_MARK;
2353 JavaValue cause(T_OBJECT);
2354 JavaCalls::call_virtual(&cause,
2355 throwable,
2356 throwable->klass(),
2357 vmSymbols::getCause_name(),
2358 vmSymbols::void_throwable_signature(),
2359 THREAD);
2360 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2361 if (HAS_PENDING_EXCEPTION) {
2362 CLEAR_PENDING_EXCEPTION;
2363 throwable = Handle();
2364 } else {
2365 throwable = Handle(THREAD, (oop) cause.get_jobject());
2366 if (throwable.not_null()) {
2367 st->print("Caused by: ");
2368 print(throwable(), st);
2369 st->cr();
2370 }
2371 }
2372 }
2373 }
2374 }
2375
2376 /**
2377 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2378 */
2379 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2380 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2381 JavaValue result(T_VOID);
2382 JavaCalls::call_virtual(&result,
2383 throwable,
2384 SystemDictionary::Throwable_klass(),
2385 vmSymbols::printStackTrace_name(),
2386 vmSymbols::void_method_signature(),
2387 THREAD);
2388 }
2389
2390 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2391 if (!StackTraceInThrowable) return;
2392 ResourceMark rm(THREAD);
2393
2394 // Start out by clearing the backtrace for this object, in case the VM
2395 // runs out of memory while allocating the stack trace
2396 set_backtrace(throwable(), NULL);
2397 // Clear lazily constructed Java level stacktrace if refilling occurs
2398 // This is unnecessary in 1.7+ but harmless
2399 clear_stacktrace(throwable());
2400
2401 int max_depth = MaxJavaStackTraceDepth;
2402 JavaThread* thread = (JavaThread*)THREAD;
2403
2404 BacktraceBuilder bt(CHECK);
2405
2406 // If there is no Java frame just return the method that was being called
2407 // with bci 0
2408 if (!thread->has_last_Java_frame()) {
2409 if (max_depth >= 1 && method() != NULL) {
2410 bt.push(method(), 0, CHECK);
2411 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2412 set_depth(throwable(), 1);
2413 set_backtrace(throwable(), bt.backtrace());
2414 }
2415 return;
2416 }
2417
2418 // Instead of using vframe directly, this version of fill_in_stack_trace
2419 // basically handles everything by hand. This significantly improved the
2420 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2421 // See bug 6333838 for more details.
2422 // The "ASSERT" here is to verify this method generates the exactly same stack
2423 // trace as utilizing vframe.
2424 #ifdef ASSERT
2425 vframeStream st(thread);
2426 methodHandle st_method(THREAD, st.method());
2427 #endif
2428 int total_count = 0;
2429 RegisterMap map(thread, false);
2430 int decode_offset = 0;
2431 CompiledMethod* nm = NULL;
2432 bool skip_fillInStackTrace_check = false;
2433 bool skip_throwableInit_check = false;
2434 bool skip_hidden = !ShowHiddenFrames;
2435
2436 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2437 Method* method = NULL;
2438 int bci = 0;
2439
2440 // Compiled java method case.
2441 if (decode_offset != 0) {
2442 DebugInfoReadStream stream(nm, decode_offset);
2443 decode_offset = stream.read_int();
2444 method = (Method*)nm->metadata_at(stream.read_int());
2445 bci = stream.read_bci();
2446 } else {
2447 if (fr.is_first_frame()) break;
2448 address pc = fr.pc();
2449 if (fr.is_interpreted_frame()) {
2450 address bcp = fr.interpreter_frame_bcp();
2451 method = fr.interpreter_frame_method();
2452 bci = method->bci_from(bcp);
2453 fr = fr.sender(&map);
2454 } else {
2455 CodeBlob* cb = fr.cb();
2456 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2457 // but non nmethod
2458 fr = fr.sender(&map);
2459 if (cb == NULL || !cb->is_compiled()) {
2460 continue;
2461 }
2462 nm = cb->as_compiled_method();
2463 if (nm->method()->is_native()) {
2464 method = nm->method();
2465 bci = 0;
2466 } else {
2467 PcDesc* pd = nm->pc_desc_at(pc);
2468 decode_offset = pd->scope_decode_offset();
2469 // if decode_offset is not equal to 0, it will execute the
2470 // "compiled java method case" at the beginning of the loop.
2471 continue;
2472 }
2473 }
2474 }
2475 #ifdef ASSERT
2476 assert(st_method() == method && st.bci() == bci,
2477 "Wrong stack trace");
2478 st.next();
2479 // vframeStream::method isn't GC-safe so store off a copy
2480 // of the Method* in case we GC.
2481 if (!st.at_end()) {
2482 st_method = st.method();
2483 }
2484 #endif
2485
2486 // the format of the stacktrace will be:
2487 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2488 // - 0 or more <init> methods for the exception class (skipped)
2489 // - rest of the stack
2490
2491 if (!skip_fillInStackTrace_check) {
2492 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2493 throwable->is_a(method->method_holder())) {
2494 continue;
2495 }
2496 else {
2497 skip_fillInStackTrace_check = true; // gone past them all
2498 }
2499 }
2500 if (!skip_throwableInit_check) {
2501 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2502
2503 // skip <init> methods of the exception class and superclasses
2504 // This is simlar to classic VM.
2505 if (method->name() == vmSymbols::object_initializer_name() &&
2506 throwable->is_a(method->method_holder())) {
2507 continue;
2508 } else {
2509 // there are none or we've seen them all - either way stop checking
2510 skip_throwableInit_check = true;
2511 }
2512 }
2513 if (method->is_hidden()) {
2514 if (skip_hidden) continue;
2515 }
2516 bt.push(method, bci, CHECK);
2517 total_count++;
2518 }
2519
2520 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2521
2522 // Put completed stack trace into throwable object
2523 set_backtrace(throwable(), bt.backtrace());
2524 set_depth(throwable(), total_count);
2525 }
2526
2527 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2528 // No-op if stack trace is disabled
2529 if (!StackTraceInThrowable) {
2530 return;
2531 }
2532
2533 // Disable stack traces for some preallocated out of memory errors
2534 if (!Universe::should_fill_in_stack_trace(throwable)) {
2535 return;
2536 }
2537
2538 PRESERVE_EXCEPTION_MARK;
2539
2540 JavaThread* thread = JavaThread::active();
2541 fill_in_stack_trace(throwable, method, thread);
2542 // ignore exceptions thrown during stack trace filling
2543 CLEAR_PENDING_EXCEPTION;
2544 }
2545
2546 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2547 // Allocate stack trace - backtrace is created but not filled in
2548
2549 // No-op if stack trace is disabled
2550 if (!StackTraceInThrowable) return;
2551 BacktraceBuilder bt(CHECK); // creates a backtrace
2552 set_backtrace(throwable(), bt.backtrace());
2553 }
2554
2555
2556 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2557 // Fill in stack trace into preallocated backtrace (no GC)
2558
2559 // No-op if stack trace is disabled
2560 if (!StackTraceInThrowable) return;
2561
2562 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2563
2564 JavaThread* THREAD = JavaThread::current();
2565
2566 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2567 assert(backtrace.not_null(), "backtrace should have been preallocated");
2568
2569 ResourceMark rm(THREAD);
2570 vframeStream st(THREAD);
2571
2572 BacktraceBuilder bt(THREAD, backtrace);
2573
2574 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2575 // methods as preallocated errors aren't created by "java" code.
2576
2577 // fill in as much stack trace as possible
2578 int chunk_count = 0;
2579 for (;!st.at_end(); st.next()) {
2580 bt.push(st.method(), st.bci(), CHECK);
2581 chunk_count++;
2582
2583 // Bail-out for deep stacks
2584 if (chunk_count >= trace_chunk_size) break;
2585 }
2586 set_depth(throwable(), chunk_count);
2587 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2588
2589 // We support the Throwable immutability protocol defined for Java 7.
2590 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2591 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2592 }
2593
2594 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2595 objArrayHandle stack_trace_array_h, TRAPS) {
2596
2597 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2598 THROW(vmSymbols::java_lang_NullPointerException());
2599 }
2600
2601 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2602
2603 if (stack_trace_array_h->length() != depth(throwable())) {
2604 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2605 }
2606
2607 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2608 BacktraceIterator iter(result, THREAD);
2609
2610 int index = 0;
2611 while (iter.repeat()) {
2612 BacktraceElement bte = iter.next(THREAD);
2613
2614 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2615
2616 if (stack_trace_element.is_null()) {
2617 THROW(vmSymbols::java_lang_NullPointerException());
2618 }
2619
2620 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2621 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2622
2623 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2624 method,
2625 bte._version,
2626 bte._bci,
2627 bte._name, CHECK);
2628 }
2629 }
2630
2631 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2632 // Allocate java.lang.StackTraceElement instance
2633 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2634 assert(k != NULL, "must be loaded in 1.4+");
2635 if (k->should_be_initialized()) {
2636 k->initialize(CHECK_0);
2637 }
2638
2639 Handle element = k->allocate_instance_handle(CHECK_0);
2640
2641 int version = method->constants()->version();
2642 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2643 return element();
2644 }
2645
2646 void java_lang_StackTraceElement::fill_in(Handle element,
2647 InstanceKlass* holder, const methodHandle& method,
2648 int version, int bci, Symbol* name, TRAPS) {
2649 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2650
2651 ResourceMark rm(THREAD);
2652 HandleMark hm(THREAD);
2653
2654 // Fill in class name
2655 Handle java_class(THREAD, holder->java_mirror());
2656 oop classname = java_lang_Class::name(java_class, CHECK);
2657 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2658 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2659
2660 oop loader = holder->class_loader();
2661 if (loader != NULL) {
2662 oop loader_name = java_lang_ClassLoader::name(loader);
2663 if (loader_name != NULL)
2664 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2665 }
2666
2667 // Fill in method name
2668 oop methodname = StringTable::intern(name, CHECK);
2669 java_lang_StackTraceElement::set_methodName(element(), methodname);
2670
2671 // Fill in module name and version
2672 ModuleEntry* module = holder->module();
2673 if (module->is_named()) {
2674 oop module_name = StringTable::intern(module->name(), CHECK);
2675 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2676 oop module_version;
2677 if (module->version() != NULL) {
2678 module_version = StringTable::intern(module->version(), CHECK);
2679 } else {
2680 module_version = NULL;
2681 }
2682 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2683 }
2684
2685 if (method() == NULL || !version_matches(method(), version)) {
2686 // The method was redefined, accurate line number information isn't available
2687 java_lang_StackTraceElement::set_fileName(element(), NULL);
2688 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2689 } else {
2690 // Fill in source file name and line number.
2691 Symbol* source = Backtrace::get_source_file_name(holder, version);
2692 oop source_file = java_lang_Class::source_file(java_class());
2693 if (source != NULL) {
2694 // Class was not redefined. We can trust its cache if set,
2695 // else we have to initialize it.
2696 if (source_file == NULL) {
2697 source_file = StringTable::intern(source, CHECK);
2698 java_lang_Class::set_source_file(java_class(), source_file);
2699 }
2700 } else {
2701 // Class was redefined. Dump the cache if it was set.
2702 if (source_file != NULL) {
2703 source_file = NULL;
2704 java_lang_Class::set_source_file(java_class(), source_file);
2705 }
2706 if (ShowHiddenFrames) {
2707 source = vmSymbols::unknown_class_name();
2708 source_file = StringTable::intern(source, CHECK);
2709 }
2710 }
2711 java_lang_StackTraceElement::set_fileName(element(), source_file);
2712
2713 int line_number = Backtrace::get_line_number(method, bci);
2714 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2715 }
2716 }
2717
2718 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2719 HandleMark hm(THREAD);
2720 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2721 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2722 // we should expand MemberName::name when Throwable uses StackTrace
2723 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2724 return method;
2725 }
2726
2727 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2728 // set Method* or mid/cpref
2729 HandleMark hm(THREAD);
2730 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2731 InstanceKlass* ik = method->method_holder();
2732 CallInfo info(method(), ik, CHECK);
2733 MethodHandles::init_method_MemberName(mname, info);
2734 // set bci
2735 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2736 // method may be redefined; store the version
2737 int version = method->constants()->version();
2738 assert((jushort)version == version, "version should be short");
2739 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2740 }
2741
2742 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2743 ResourceMark rm(THREAD);
2744 HandleMark hm(THREAD);
2745 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2746 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2747 InstanceKlass* holder = InstanceKlass::cast(clazz);
2748 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2749
2750 short version = stackFrame->short_field(_version_offset);
2751 short bci = stackFrame->short_field(_bci_offset);
2752 Symbol* name = method->name();
2753 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2754 }
2755
2756 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2757 macro(_memberName_offset, k, "memberName", object_signature, false); \
2758 macro(_bci_offset, k, "bci", short_signature, false)
2759
2760 void java_lang_StackFrameInfo::compute_offsets() {
2761 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2762 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2763 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2764 }
2765
2766 #if INCLUDE_CDS
2767 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2768 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2769 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2770 }
2771 #endif
2772
2773 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2774 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2775 macro(_locals_offset, k, "locals", object_array_signature, false); \
2776 macro(_operands_offset, k, "operands", object_array_signature, false); \
2777 macro(_mode_offset, k, "mode", int_signature, false)
2778
2779 void java_lang_LiveStackFrameInfo::compute_offsets() {
2780 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2781 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2782 }
2783
2784 #if INCLUDE_CDS
2785 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2786 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2787 }
2788 #endif
2789
2790 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2791 macro(override_offset, k, "override", bool_signature, false)
2792
2793 void java_lang_reflect_AccessibleObject::compute_offsets() {
2794 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2795 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2796 }
2797
2798 #if INCLUDE_CDS
2799 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2800 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2801 }
2802 #endif
2803
2804 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2805 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2806 return (jboolean) reflect->bool_field(override_offset);
2807 }
2808
2809 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2810 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2811 reflect->bool_field_put(override_offset, (int) value);
2812 }
2813
2814 #define METHOD_FIELDS_DO(macro) \
2815 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2816 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2817 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2818 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2819 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2820 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2821 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2822 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2823 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2824 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2825 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2826
2827 void java_lang_reflect_Method::compute_offsets() {
2828 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2829 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2830 }
2831
2832 #if INCLUDE_CDS
2833 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2834 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2835 }
2836 #endif
2837
2838 Handle java_lang_reflect_Method::create(TRAPS) {
2839 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2840 Klass* klass = SystemDictionary::reflect_Method_klass();
2841 // This class is eagerly initialized during VM initialization, since we keep a refence
2842 // to one of the methods
2843 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2844 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2845 }
2846
2847 oop java_lang_reflect_Method::clazz(oop reflect) {
2848 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2849 return reflect->obj_field(clazz_offset);
2850 }
2851
2852 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2853 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2854 reflect->obj_field_put(clazz_offset, value);
2855 }
2856
2857 int java_lang_reflect_Method::slot(oop reflect) {
2858 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2859 return reflect->int_field(slot_offset);
2860 }
2861
2862 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2863 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2864 reflect->int_field_put(slot_offset, value);
2865 }
2866
2867 void java_lang_reflect_Method::set_name(oop method, oop value) {
2868 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2869 method->obj_field_put(name_offset, value);
2870 }
2871
2872 oop java_lang_reflect_Method::return_type(oop method) {
2873 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2874 return method->obj_field(returnType_offset);
2875 }
2876
2877 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2878 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2879 method->obj_field_put(returnType_offset, value);
2880 }
2881
2882 oop java_lang_reflect_Method::parameter_types(oop method) {
2883 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2884 return method->obj_field(parameterTypes_offset);
2885 }
2886
2887 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2888 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2889 method->obj_field_put(parameterTypes_offset, value);
2890 }
2891
2892 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2893 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2894 method->obj_field_put(exceptionTypes_offset, value);
2895 }
2896
2897 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2898 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2899 method->int_field_put(modifiers_offset, value);
2900 }
2901
2902 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2903 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2904 method->obj_field_put(signature_offset, value);
2905 }
2906
2907 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2908 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2909 method->obj_field_put(annotations_offset, value);
2910 }
2911
2912 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2913 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2914 method->obj_field_put(parameter_annotations_offset, value);
2915 }
2916
2917 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2918 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2919 method->obj_field_put(annotation_default_offset, value);
2920 }
2921
2922 #define CONSTRUCTOR_FIELDS_DO(macro) \
2923 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2924 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2925 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2926 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2927 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2928 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2929 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2930 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2931
2932 void java_lang_reflect_Constructor::compute_offsets() {
2933 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2934 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2935 }
2936
2937 #if INCLUDE_CDS
2938 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2939 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2940 }
2941 #endif
2942
2943 Handle java_lang_reflect_Constructor::create(TRAPS) {
2944 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2945 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2946 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2947 InstanceKlass* ik = InstanceKlass::cast(k);
2948 // Ensure it is initialized
2949 ik->initialize(CHECK_NH);
2950 return ik->allocate_instance_handle(THREAD);
2951 }
2952
2953 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2954 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2955 return reflect->obj_field(clazz_offset);
2956 }
2957
2958 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2959 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2960 reflect->obj_field_put(clazz_offset, value);
2961 }
2962
2963 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2964 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2965 return constructor->obj_field(parameterTypes_offset);
2966 }
2967
2968 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2969 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2970 constructor->obj_field_put(parameterTypes_offset, value);
2971 }
2972
2973 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2975 constructor->obj_field_put(exceptionTypes_offset, value);
2976 }
2977
2978 int java_lang_reflect_Constructor::slot(oop reflect) {
2979 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2980 return reflect->int_field(slot_offset);
2981 }
2982
2983 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2984 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2985 reflect->int_field_put(slot_offset, value);
2986 }
2987
2988 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2989 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2990 constructor->int_field_put(modifiers_offset, value);
2991 }
2992
2993 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2994 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2995 constructor->obj_field_put(signature_offset, value);
2996 }
2997
2998 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2999 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3000 constructor->obj_field_put(annotations_offset, value);
3001 }
3002
3003 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3004 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3005 method->obj_field_put(parameter_annotations_offset, value);
3006 }
3007
3008 #define FIELD_FIELDS_DO(macro) \
3009 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3010 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3011 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3012 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3013 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3014 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3015 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3016
3017 void java_lang_reflect_Field::compute_offsets() {
3018 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3019 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3020 }
3021
3022 #if INCLUDE_CDS
3023 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3024 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3025 }
3026 #endif
3027
3028 Handle java_lang_reflect_Field::create(TRAPS) {
3029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3030 Symbol* name = vmSymbols::java_lang_reflect_Field();
3031 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3032 InstanceKlass* ik = InstanceKlass::cast(k);
3033 // Ensure it is initialized
3034 ik->initialize(CHECK_NH);
3035 return ik->allocate_instance_handle(THREAD);
3036 }
3037
3038 oop java_lang_reflect_Field::clazz(oop reflect) {
3039 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3040 return reflect->obj_field(clazz_offset);
3041 }
3042
3043 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3044 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3045 reflect->obj_field_put(clazz_offset, value);
3046 }
3047
3048 oop java_lang_reflect_Field::name(oop field) {
3049 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3050 return field->obj_field(name_offset);
3051 }
3052
3053 void java_lang_reflect_Field::set_name(oop field, oop value) {
3054 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3055 field->obj_field_put(name_offset, value);
3056 }
3057
3058 oop java_lang_reflect_Field::type(oop field) {
3059 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3060 return field->obj_field(type_offset);
3061 }
3062
3063 void java_lang_reflect_Field::set_type(oop field, oop value) {
3064 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3065 field->obj_field_put(type_offset, value);
3066 }
3067
3068 int java_lang_reflect_Field::slot(oop reflect) {
3069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3070 return reflect->int_field(slot_offset);
3071 }
3072
3073 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3074 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3075 reflect->int_field_put(slot_offset, value);
3076 }
3077
3078 int java_lang_reflect_Field::modifiers(oop field) {
3079 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3080 return field->int_field(modifiers_offset);
3081 }
3082
3083 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3084 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3085 field->int_field_put(modifiers_offset, value);
3086 }
3087
3088 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3089 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3090 field->obj_field_put(signature_offset, value);
3091 }
3092
3093 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3094 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3095 field->obj_field_put(annotations_offset, value);
3096 }
3097
3098 #define CONSTANTPOOL_FIELDS_DO(macro) \
3099 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3100
3101 void reflect_ConstantPool::compute_offsets() {
3102 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3103 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3104 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3105 }
3106
3107 #if INCLUDE_CDS
3108 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3109 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3110 }
3111 #endif
3112
3113 #define PARAMETER_FIELDS_DO(macro) \
3114 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3115 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3116 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3117 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3118
3119 void java_lang_reflect_Parameter::compute_offsets() {
3120 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3121 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3122 }
3123
3124 #if INCLUDE_CDS
3125 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3126 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3127 }
3128 #endif
3129
3130 Handle java_lang_reflect_Parameter::create(TRAPS) {
3131 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3132 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3133 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3134 InstanceKlass* ik = InstanceKlass::cast(k);
3135 // Ensure it is initialized
3136 ik->initialize(CHECK_NH);
3137 return ik->allocate_instance_handle(THREAD);
3138 }
3139
3140 oop java_lang_reflect_Parameter::name(oop param) {
3141 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3142 return param->obj_field(name_offset);
3143 }
3144
3145 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3146 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3147 param->obj_field_put(name_offset, value);
3148 }
3149
3150 int java_lang_reflect_Parameter::modifiers(oop param) {
3151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3152 return param->int_field(modifiers_offset);
3153 }
3154
3155 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3156 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3157 param->int_field_put(modifiers_offset, value);
3158 }
3159
3160 int java_lang_reflect_Parameter::index(oop param) {
3161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3162 return param->int_field(index_offset);
3163 }
3164
3165 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3166 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3167 param->int_field_put(index_offset, value);
3168 }
3169
3170 oop java_lang_reflect_Parameter::executable(oop param) {
3171 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3172 return param->obj_field(executable_offset);
3173 }
3174
3175 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3176 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3177 param->obj_field_put(executable_offset, value);
3178 }
3179
3180
3181 int java_lang_Module::loader_offset;
3182 int java_lang_Module::name_offset;
3183 int java_lang_Module::_module_entry_offset = -1;
3184
3185 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3186 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3187 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3188 vmSymbols::java_lang_module_init_signature(),
3189 loader, module_name, CHECK_NH);
3190 }
3191
3192 #define MODULE_FIELDS_DO(macro) \
3193 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3194 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3195
3196 void java_lang_Module::compute_offsets() {
3197 InstanceKlass* k = SystemDictionary::Module_klass();
3198 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3199 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3200 }
3201
3202 #if INCLUDE_CDS
3203 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3204 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3205 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3206 }
3207 #endif
3208
3209 oop java_lang_Module::loader(oop module) {
3210 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3211 return module->obj_field(loader_offset);
3212 }
3213
3214 void java_lang_Module::set_loader(oop module, oop value) {
3215 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3216 module->obj_field_put(loader_offset, value);
3217 }
3218
3219 oop java_lang_Module::name(oop module) {
3220 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3221 return module->obj_field(name_offset);
3222 }
3223
3224 void java_lang_Module::set_name(oop module, oop value) {
3225 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3226 module->obj_field_put(name_offset, value);
3227 }
3228
3229 ModuleEntry* java_lang_Module::module_entry(oop module) {
3230 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3231 assert(module != NULL, "module can't be null");
3232 assert(oopDesc::is_oop(module), "module must be oop");
3233
3234 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3235 if (module_entry == NULL) {
3236 // If the inject field containing the ModuleEntry* is null then return the
3237 // class loader's unnamed module.
3238 oop loader = java_lang_Module::loader(module);
3239 Handle h_loader = Handle(Thread::current(), loader);
3240 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3241 return loader_cld->unnamed_module();
3242 }
3243 return module_entry;
3244 }
3245
3246 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3247 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3248 assert(module != NULL, "module can't be null");
3249 assert(oopDesc::is_oop(module), "module must be oop");
3250 module->address_field_put(_module_entry_offset, (address)module_entry);
3251 }
3252
3253 Handle reflect_ConstantPool::create(TRAPS) {
3254 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3255 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3256 // Ensure it is initialized
3257 k->initialize(CHECK_NH);
3258 return k->allocate_instance_handle(THREAD);
3259 }
3260
3261
3262 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3263 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3264 oop mirror = value->pool_holder()->java_mirror();
3265 // Save the mirror to get back the constant pool.
3266 reflect->obj_field_put(_oop_offset, mirror);
3267 }
3268
3269 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3270 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3271
3272 oop mirror = reflect->obj_field(_oop_offset);
3273 Klass* k = java_lang_Class::as_Klass(mirror);
3274 assert(k->is_instance_klass(), "Must be");
3275
3276 // Get the constant pool back from the klass. Since class redefinition
3277 // merges the new constant pool into the old, this is essentially the
3278 // same constant pool as the original. If constant pool merging is
3279 // no longer done in the future, this will have to change to save
3280 // the original.
3281 return InstanceKlass::cast(k)->constants();
3282 }
3283
3284 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3285 macro(_base_offset, k, "base", object_signature, false)
3286
3287 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3288 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3289 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3290 }
3291
3292 #if INCLUDE_CDS
3293 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3294 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3295 }
3296 #endif
3297
3298 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3299 Klass* k = SystemDictionary::box_klass(type);
3300 if (k == NULL) return NULL;
3301 InstanceKlass* ik = InstanceKlass::cast(k);
3302 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3303 return ik->allocate_instance(THREAD);
3304 }
3305
3306
3307 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3308 oop box = initialize_and_allocate(type, CHECK_0);
3309 if (box == NULL) return NULL;
3310 switch (type) {
3311 case T_BOOLEAN:
3312 box->bool_field_put(value_offset, value->z);
3313 break;
3314 case T_CHAR:
3315 box->char_field_put(value_offset, value->c);
3316 break;
3317 case T_FLOAT:
3318 box->float_field_put(value_offset, value->f);
3319 break;
3320 case T_DOUBLE:
3321 box->double_field_put(long_value_offset, value->d);
3322 break;
3323 case T_BYTE:
3324 box->byte_field_put(value_offset, value->b);
3325 break;
3326 case T_SHORT:
3327 box->short_field_put(value_offset, value->s);
3328 break;
3329 case T_INT:
3330 box->int_field_put(value_offset, value->i);
3331 break;
3332 case T_LONG:
3333 box->long_field_put(long_value_offset, value->j);
3334 break;
3335 default:
3336 return NULL;
3337 }
3338 return box;
3339 }
3340
3341
3342 BasicType java_lang_boxing_object::basic_type(oop box) {
3343 if (box == NULL) return T_ILLEGAL;
3344 BasicType type = SystemDictionary::box_klass_type(box->klass());
3345 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3346 return T_ILLEGAL;
3347 return type;
3348 }
3349
3350
3351 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3352 BasicType type = SystemDictionary::box_klass_type(box->klass());
3353 switch (type) {
3354 case T_BOOLEAN:
3355 value->z = box->bool_field(value_offset);
3356 break;
3357 case T_CHAR:
3358 value->c = box->char_field(value_offset);
3359 break;
3360 case T_FLOAT:
3361 value->f = box->float_field(value_offset);
3362 break;
3363 case T_DOUBLE:
3364 value->d = box->double_field(long_value_offset);
3365 break;
3366 case T_BYTE:
3367 value->b = box->byte_field(value_offset);
3368 break;
3369 case T_SHORT:
3370 value->s = box->short_field(value_offset);
3371 break;
3372 case T_INT:
3373 value->i = box->int_field(value_offset);
3374 break;
3375 case T_LONG:
3376 value->j = box->long_field(long_value_offset);
3377 break;
3378 default:
3379 return T_ILLEGAL;
3380 } // end switch
3381 return type;
3382 }
3383
3384
3385 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3386 BasicType type = SystemDictionary::box_klass_type(box->klass());
3387 switch (type) {
3388 case T_BOOLEAN:
3389 box->bool_field_put(value_offset, value->z);
3390 break;
3391 case T_CHAR:
3392 box->char_field_put(value_offset, value->c);
3393 break;
3394 case T_FLOAT:
3395 box->float_field_put(value_offset, value->f);
3396 break;
3397 case T_DOUBLE:
3398 box->double_field_put(long_value_offset, value->d);
3399 break;
3400 case T_BYTE:
3401 box->byte_field_put(value_offset, value->b);
3402 break;
3403 case T_SHORT:
3404 box->short_field_put(value_offset, value->s);
3405 break;
3406 case T_INT:
3407 box->int_field_put(value_offset, value->i);
3408 break;
3409 case T_LONG:
3410 box->long_field_put(long_value_offset, value->j);
3411 break;
3412 default:
3413 return T_ILLEGAL;
3414 } // end switch
3415 return type;
3416 }
3417
3418
3419 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3420 switch (type) {
3421 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3422 case T_CHAR: st->print("%d", value->c); break;
3423 case T_BYTE: st->print("%d", value->b); break;
3424 case T_SHORT: st->print("%d", value->s); break;
3425 case T_INT: st->print("%d", value->i); break;
3426 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3427 case T_FLOAT: st->print("%f", value->f); break;
3428 case T_DOUBLE: st->print("%lf", value->d); break;
3429 default: st->print("type %d?", type); break;
3430 }
3431 }
3432
3433 // Support for java_lang_ref_Reference
3434
3435 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3436 assert(obj != NULL, "sanity");
3437 if (offset != java_lang_ref_Reference::referent_offset) {
3438 return false;
3439 }
3440
3441 Klass* k = obj->klass();
3442 if (!k->is_instance_klass()) {
3443 return false;
3444 }
3445
3446 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3447 bool is_reference = ik->reference_type() != REF_NONE;
3448 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3449 return is_reference;
3450 }
3451
3452 // Support for java_lang_ref_SoftReference
3453 //
3454
3455 #define SOFTREFERENCE_FIELDS_DO(macro) \
3456 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3457 macro(static_clock_offset, k, "clock", long_signature, true)
3458
3459 void java_lang_ref_SoftReference::compute_offsets() {
3460 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3461 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3462 }
3463
3464 #if INCLUDE_CDS
3465 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3466 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3467 }
3468 #endif
3469
3470 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3471 return ref->long_field(timestamp_offset);
3472 }
3473
3474 jlong java_lang_ref_SoftReference::clock() {
3475 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3476 oop base = ik->static_field_base_raw();
3477 return base->long_field(static_clock_offset);
3478 }
3479
3480 void java_lang_ref_SoftReference::set_clock(jlong value) {
3481 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3482 oop base = ik->static_field_base_raw();
3483 base->long_field_put(static_clock_offset, value);
3484 }
3485
3486 // Support for java_lang_invoke_DirectMethodHandle
3487
3488 int java_lang_invoke_DirectMethodHandle::_member_offset;
3489
3490 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3491 oop member_name = NULL;
3492 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3493 "a DirectMethodHandle oop is expected");
3494 return dmh->obj_field(member_offset_in_bytes());
3495 }
3496
3497 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3498 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3499
3500 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3501 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3502 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3503 }
3504
3505 #if INCLUDE_CDS
3506 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3507 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3508 }
3509 #endif
3510
3511 // Support for java_lang_invoke_MethodHandle
3512
3513 int java_lang_invoke_MethodHandle::_type_offset;
3514 int java_lang_invoke_MethodHandle::_form_offset;
3515
3516 int java_lang_invoke_MemberName::_clazz_offset;
3517 int java_lang_invoke_MemberName::_name_offset;
3518 int java_lang_invoke_MemberName::_type_offset;
3519 int java_lang_invoke_MemberName::_flags_offset;
3520 int java_lang_invoke_MemberName::_method_offset;
3521 int java_lang_invoke_MemberName::_vmindex_offset;
3522
3523 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3524 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3525
3526 int java_lang_invoke_LambdaForm::_vmentry_offset;
3527
3528 #define METHODHANDLE_FIELDS_DO(macro) \
3529 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3530 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3531
3532 void java_lang_invoke_MethodHandle::compute_offsets() {
3533 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3534 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3535 }
3536
3537 #if INCLUDE_CDS
3538 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3539 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3540 }
3541 #endif
3542
3543 #define MEMBERNAME_FIELDS_DO(macro) \
3544 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3545 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3546 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3547 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3548 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3549
3550 void java_lang_invoke_MemberName::compute_offsets() {
3551 InstanceKlass* k = SystemDictionary::MemberName_klass();
3552 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3553 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3554 }
3555
3556 #if INCLUDE_CDS
3557 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3558 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3559 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3560 }
3561 #endif
3562
3563 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3564 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3565 assert(k != NULL, "jdk mismatch");
3566 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3567 }
3568
3569 #if INCLUDE_CDS
3570 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3571 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3572 }
3573 #endif
3574
3575 #define LAMBDAFORM_FIELDS_DO(macro) \
3576 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3577
3578 void java_lang_invoke_LambdaForm::compute_offsets() {
3579 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3580 assert (k != NULL, "jdk mismatch");
3581 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3582 }
3583
3584 #if INCLUDE_CDS
3585 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3586 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3587 }
3588 #endif
3589
3590 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3591 return obj != NULL && is_subclass(obj->klass());
3592 }
3593
3594
3595 oop java_lang_invoke_MethodHandle::type(oop mh) {
3596 return mh->obj_field(_type_offset);
3597 }
3598
3599 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3600 mh->obj_field_put(_type_offset, mtype);
3601 }
3602
3603 oop java_lang_invoke_MethodHandle::form(oop mh) {
3604 assert(_form_offset != 0, "");
3605 return mh->obj_field(_form_offset);
3606 }
3607
3608 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3609 assert(_form_offset != 0, "");
3610 mh->obj_field_put(_form_offset, lform);
3611 }
3612
3613 /// MemberName accessors
3614
3615 oop java_lang_invoke_MemberName::clazz(oop mname) {
3616 assert(is_instance(mname), "wrong type");
3617 return mname->obj_field(_clazz_offset);
3618 }
3619
3620 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3621 assert(is_instance(mname), "wrong type");
3622 mname->obj_field_put(_clazz_offset, clazz);
3623 }
3624
3625 oop java_lang_invoke_MemberName::name(oop mname) {
3626 assert(is_instance(mname), "wrong type");
3627 return mname->obj_field(_name_offset);
3628 }
3629
3630 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3631 assert(is_instance(mname), "wrong type");
3632 mname->obj_field_put(_name_offset, name);
3633 }
3634
3635 oop java_lang_invoke_MemberName::type(oop mname) {
3636 assert(is_instance(mname), "wrong type");
3637 return mname->obj_field(_type_offset);
3638 }
3639
3640 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3641 assert(is_instance(mname), "wrong type");
3642 mname->obj_field_put(_type_offset, type);
3643 }
3644
3645 int java_lang_invoke_MemberName::flags(oop mname) {
3646 assert(is_instance(mname), "wrong type");
3647 return mname->int_field(_flags_offset);
3648 }
3649
3650 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3651 assert(is_instance(mname), "wrong type");
3652 mname->int_field_put(_flags_offset, flags);
3653 }
3654
3655
3656 // Return vmtarget from ResolvedMethodName method field through indirection
3657 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3658 assert(is_instance(mname), "wrong type");
3659 oop method = mname->obj_field(_method_offset);
3660 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3661 }
3662
3663 bool java_lang_invoke_MemberName::is_method(oop mname) {
3664 assert(is_instance(mname), "must be MemberName");
3665 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3666 }
3667
3668 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3669 assert(is_instance(mname), "wrong type");
3670 mname->obj_field_put(_method_offset, resolved_method);
3671 }
3672
3673 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3674 assert(is_instance(mname), "wrong type");
3675 return (intptr_t) mname->address_field(_vmindex_offset);
3676 }
3677
3678 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3679 assert(is_instance(mname), "wrong type");
3680 mname->address_field_put(_vmindex_offset, (address) index);
3681 }
3682
3683
3684 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3685 assert(is_instance(resolved_method), "wrong type");
3686 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3687 assert(m->is_method(), "must be");
3688 return m;
3689 }
3690
3691 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3692 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3693 assert(is_instance(resolved_method), "wrong type");
3694 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3695 }
3696
3697 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3698 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3699 oop resolved_method = ResolvedMethodTable::find_method(m());
3700 if (resolved_method == NULL) {
3701 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3702 if (!k->is_initialized()) {
3703 k->initialize(CHECK_NULL);
3704 }
3705 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3706 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3707 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3708 // distinct loaders) to ensure the metadata is kept alive.
3709 // This mirror may be different than the one in clazz field.
3710 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3711 resolved_method = ResolvedMethodTable::add_method(m, Handle(THREAD, new_resolved_method));
3712 }
3713 return resolved_method;
3714 }
3715
3716 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3717 assert(is_instance(lform), "wrong type");
3718 return lform->obj_field(_vmentry_offset);
3719 }
3720
3721
3722 // Support for java_lang_invoke_MethodType
3723
3724 int java_lang_invoke_MethodType::_rtype_offset;
3725 int java_lang_invoke_MethodType::_ptypes_offset;
3726
3727 #define METHODTYPE_FIELDS_DO(macro) \
3728 macro(_rtype_offset, k, "rtype", class_signature, false); \
3729 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3730
3731 void java_lang_invoke_MethodType::compute_offsets() {
3732 InstanceKlass* k = SystemDictionary::MethodType_klass();
3733 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3734 }
3735
3736 #if INCLUDE_CDS
3737 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3738 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3739 }
3740 #endif
3741
3742 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3743 st->print("(");
3744 objArrayOop pts = ptypes(mt);
3745 for (int i = 0, limit = pts->length(); i < limit; i++) {
3746 java_lang_Class::print_signature(pts->obj_at(i), st);
3747 }
3748 st->print(")");
3749 java_lang_Class::print_signature(rtype(mt), st);
3750 }
3751
3752 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3753 ResourceMark rm;
3754 stringStream buffer(128);
3755 print_signature(mt, &buffer);
3756 const char* sigstr = buffer.base();
3757 int siglen = (int) buffer.size();
3758 Symbol *name;
3759 if (!intern_if_not_found) {
3760 name = SymbolTable::probe(sigstr, siglen);
3761 } else {
3762 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3763 }
3764 return name;
3765 }
3766
3767 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3768 if (oopDesc::equals(mt1, mt2))
3769 return true;
3770 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3771 return false;
3772 if (ptype_count(mt1) != ptype_count(mt2))
3773 return false;
3774 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3775 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3776 return false;
3777 }
3778 return true;
3779 }
3780
3781 oop java_lang_invoke_MethodType::rtype(oop mt) {
3782 assert(is_instance(mt), "must be a MethodType");
3783 return mt->obj_field(_rtype_offset);
3784 }
3785
3786 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3787 assert(is_instance(mt), "must be a MethodType");
3788 return (objArrayOop) mt->obj_field(_ptypes_offset);
3789 }
3790
3791 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3792 return ptypes(mt)->obj_at(idx);
3793 }
3794
3795 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3796 return ptypes(mt)->length();
3797 }
3798
3799 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3800 objArrayOop pts = ptypes(mt);
3801 int count = pts->length();
3802 int slots = 0;
3803 for (int i = 0; i < count; i++) {
3804 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3805 slots += type2size[bt];
3806 }
3807 return slots;
3808 }
3809
3810 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3811 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3812 return type2size[bt];
3813 }
3814
3815
3816 // Support for java_lang_invoke_CallSite
3817
3818 int java_lang_invoke_CallSite::_target_offset;
3819 int java_lang_invoke_CallSite::_context_offset;
3820
3821 #define CALLSITE_FIELDS_DO(macro) \
3822 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3823 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3824
3825 void java_lang_invoke_CallSite::compute_offsets() {
3826 InstanceKlass* k = SystemDictionary::CallSite_klass();
3827 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3828 }
3829
3830 #if INCLUDE_CDS
3831 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3832 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3833 }
3834 #endif
3835
3836 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3837 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3838
3839 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3840 return dep_oop;
3841 }
3842
3843 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3844
3845 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3846 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3847
3848 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3849 InstanceKlass* k = SystemDictionary::Context_klass();
3850 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3851 }
3852
3853 #if INCLUDE_CDS
3854 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3855 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3856 }
3857 #endif
3858
3859 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3860 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3861 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3862 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3863 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3864 return dep_ctx;
3865 }
3866
3867 // Support for java_security_AccessControlContext
3868
3869 int java_security_AccessControlContext::_context_offset = 0;
3870 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3871 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3872 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3873
3874 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3875 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3876 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3877 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3878 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3879
3880 void java_security_AccessControlContext::compute_offsets() {
3881 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3882 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3883 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3884 }
3885
3886 #if INCLUDE_CDS
3887 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3888 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3889 }
3890 #endif
3891
3892 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3893 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3894 // Ensure klass is initialized
3895 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3896 // Allocate result
3897 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3898 // Fill in values
3899 result->obj_field_put(_context_offset, context());
3900 result->obj_field_put(_privilegedContext_offset, privileged_context());
3901 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3902 // whitelist AccessControlContexts created by the JVM if present
3903 if (_isAuthorized_offset != -1) {
3904 result->bool_field_put(_isAuthorized_offset, true);
3905 }
3906 return result;
3907 }
3908
3909
3910 // Support for java_lang_ClassLoader
3911
3912 bool java_lang_ClassLoader::offsets_computed = false;
3913 int java_lang_ClassLoader::_loader_data_offset = -1;
3914 int java_lang_ClassLoader::parallelCapable_offset = -1;
3915 int java_lang_ClassLoader::name_offset = -1;
3916 int java_lang_ClassLoader::nameAndId_offset = -1;
3917 int java_lang_ClassLoader::unnamedModule_offset = -1;
3918
3919 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3920 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3921 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3922 }
3923
3924 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3925 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3926 return RawAccess<>::load_at(loader, _loader_data_offset);
3927 }
3928
3929 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3930 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3931 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3932 }
3933
3934 #define CLASSLOADER_FIELDS_DO(macro) \
3935 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3936 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3937 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3938 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3939 macro(parent_offset, k1, "parent", classloader_signature, false)
3940
3941 void java_lang_ClassLoader::compute_offsets() {
3942 assert(!offsets_computed, "offsets should be initialized only once");
3943 offsets_computed = true;
3944
3945 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3946 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3947
3948 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3949 }
3950
3951 #if INCLUDE_CDS
3952 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3953 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3954 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3955 }
3956 #endif
3957
3958 oop java_lang_ClassLoader::parent(oop loader) {
3959 assert(is_instance(loader), "loader must be oop");
3960 return loader->obj_field(parent_offset);
3961 }
3962
3963 // Returns the name field of this class loader. If the name field has not
3964 // been set, null will be returned.
3965 oop java_lang_ClassLoader::name(oop loader) {
3966 assert(is_instance(loader), "loader must be oop");
3967 return loader->obj_field(name_offset);
3968 }
3969
3970 // Returns the nameAndId field of this class loader. The format is
3971 // as follows:
3972 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3973 // If the defining loader has no name then <qualified-class-name> @<id>
3974 // If built-in loader, then omit '@<id>' as there is only one instance.
3975 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3976 oop java_lang_ClassLoader::nameAndId(oop loader) {
3977 assert(is_instance(loader), "loader must be oop");
3978 return loader->obj_field(nameAndId_offset);
3979 }
3980
3981 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3982 assert(is_instance(loader), "loader must be oop");
3983 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3984 oop acl = loader;
3985 debug_only(jint loop_count = 0);
3986 // This loop taken verbatim from ClassLoader.java:
3987 do {
3988 acl = parent(acl);
3989 if (oopDesc::equals(cl, acl)) {
3990 return true;
3991 }
3992 assert(++loop_count > 0, "loop_count overflow");
3993 } while (acl != NULL);
3994 return false;
3995 }
3996
3997 bool java_lang_ClassLoader::is_instance(oop obj) {
3998 return obj != NULL && is_subclass(obj->klass());
3999 }
4000
4001
4002 // For class loader classes, parallelCapable defined
4003 // based on non-null field
4004 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4005 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4006 if (parallelCapable_offset == -1) {
4007 // Default for backward compatibility is false
4008 return false;
4009 }
4010 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4011 }
4012
4013 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4014 // Fix for 4474172; see evaluation for more details
4015 loader = non_reflection_class_loader(loader);
4016
4017 oop cl = SystemDictionary::java_system_loader();
4018 while(cl != NULL) {
4019 if (oopDesc::equals(cl, loader)) return true;
4020 cl = parent(cl);
4021 }
4022 return false;
4023 }
4024
4025 // Return true if this is one of the class loaders associated with
4026 // the generated bytecodes for reflection.
4027 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4028 if (loader != NULL) {
4029 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4030 // This might be null in non-1.4 JDKs
4031 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4032 }
4033 return false;
4034 }
4035
4036 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4037 // See whether this is one of the class loaders associated with
4038 // the generated bytecodes for reflection, and if so, "magically"
4039 // delegate to its parent to prevent class loading from occurring
4040 // in places where applications using reflection didn't expect it.
4041 if (is_reflection_class_loader(loader)) {
4042 return parent(loader);
4043 }
4044 return loader;
4045 }
4046
4047 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4048 assert(is_instance(loader), "loader must be oop");
4049 return loader->obj_field(unnamedModule_offset);
4050 }
4051
4052 // Support for java_lang_System
4053 //
4054 #define SYSTEM_FIELDS_DO(macro) \
4055 macro(static_in_offset, k, "in", input_stream_signature, true); \
4056 macro(static_out_offset, k, "out", print_stream_signature, true); \
4057 macro(static_err_offset, k, "err", print_stream_signature, true); \
4058 macro(static_security_offset, k, "security", security_manager_signature, true)
4059
4060 void java_lang_System::compute_offsets() {
4061 InstanceKlass* k = SystemDictionary::System_klass();
4062 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4063 }
4064
4065 #if INCLUDE_CDS
4066 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4067 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4068 }
4069 #endif
4070
4071 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4072 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4073 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4074
4075 int java_lang_Class::_klass_offset;
4076 int java_lang_Class::_array_klass_offset;
4077 int java_lang_Class::_oop_size_offset;
4078 int java_lang_Class::_static_oop_field_count_offset;
4079 int java_lang_Class::_class_loader_offset;
4080 int java_lang_Class::_module_offset;
4081 int java_lang_Class::_protection_domain_offset;
4082 int java_lang_Class::_component_mirror_offset;
4083 int java_lang_Class::_box_mirror_offset;
4084 int java_lang_Class::_value_mirror_offset;
4085 int java_lang_Class::_init_lock_offset;
4086 int java_lang_Class::_signers_offset;
4087 int java_lang_Class::_name_offset;
4088 int java_lang_Class::_source_file_offset;
4089 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4090 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4091 int java_lang_Throwable::backtrace_offset;
4092 int java_lang_Throwable::detailMessage_offset;
4093 int java_lang_Throwable::stackTrace_offset;
4094 int java_lang_Throwable::depth_offset;
4095 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4096 int java_lang_reflect_AccessibleObject::override_offset;
4097 int java_lang_reflect_Method::clazz_offset;
4098 int java_lang_reflect_Method::name_offset;
4099 int java_lang_reflect_Method::returnType_offset;
4100 int java_lang_reflect_Method::parameterTypes_offset;
4101 int java_lang_reflect_Method::exceptionTypes_offset;
4102 int java_lang_reflect_Method::slot_offset;
4103 int java_lang_reflect_Method::modifiers_offset;
4104 int java_lang_reflect_Method::signature_offset;
4105 int java_lang_reflect_Method::annotations_offset;
4106 int java_lang_reflect_Method::parameter_annotations_offset;
4107 int java_lang_reflect_Method::annotation_default_offset;
4108 int java_lang_reflect_Constructor::clazz_offset;
4109 int java_lang_reflect_Constructor::parameterTypes_offset;
4110 int java_lang_reflect_Constructor::exceptionTypes_offset;
4111 int java_lang_reflect_Constructor::slot_offset;
4112 int java_lang_reflect_Constructor::modifiers_offset;
4113 int java_lang_reflect_Constructor::signature_offset;
4114 int java_lang_reflect_Constructor::annotations_offset;
4115 int java_lang_reflect_Constructor::parameter_annotations_offset;
4116 int java_lang_reflect_Field::clazz_offset;
4117 int java_lang_reflect_Field::name_offset;
4118 int java_lang_reflect_Field::type_offset;
4119 int java_lang_reflect_Field::slot_offset;
4120 int java_lang_reflect_Field::modifiers_offset;
4121 int java_lang_reflect_Field::signature_offset;
4122 int java_lang_reflect_Field::annotations_offset;
4123 int java_lang_reflect_Parameter::name_offset;
4124 int java_lang_reflect_Parameter::modifiers_offset;
4125 int java_lang_reflect_Parameter::index_offset;
4126 int java_lang_reflect_Parameter::executable_offset;
4127 int java_lang_boxing_object::value_offset;
4128 int java_lang_boxing_object::long_value_offset;
4129 int java_lang_ref_Reference::referent_offset;
4130 int java_lang_ref_Reference::queue_offset;
4131 int java_lang_ref_Reference::next_offset;
4132 int java_lang_ref_Reference::discovered_offset;
4133 int java_lang_ref_SoftReference::timestamp_offset;
4134 int java_lang_ref_SoftReference::static_clock_offset;
4135 int java_lang_ClassLoader::parent_offset;
4136 int java_lang_System::static_in_offset;
4137 int java_lang_System::static_out_offset;
4138 int java_lang_System::static_err_offset;
4139 int java_lang_System::static_security_offset;
4140 int java_lang_StackTraceElement::methodName_offset;
4141 int java_lang_StackTraceElement::fileName_offset;
4142 int java_lang_StackTraceElement::lineNumber_offset;
4143 int java_lang_StackTraceElement::moduleName_offset;
4144 int java_lang_StackTraceElement::moduleVersion_offset;
4145 int java_lang_StackTraceElement::classLoaderName_offset;
4146 int java_lang_StackTraceElement::declaringClass_offset;
4147 int java_lang_StackTraceElement::declaringClassObject_offset;
4148 int java_lang_StackFrameInfo::_memberName_offset;
4149 int java_lang_StackFrameInfo::_bci_offset;
4150 int java_lang_StackFrameInfo::_version_offset;
4151 int java_lang_LiveStackFrameInfo::_monitors_offset;
4152 int java_lang_LiveStackFrameInfo::_locals_offset;
4153 int java_lang_LiveStackFrameInfo::_operands_offset;
4154 int java_lang_LiveStackFrameInfo::_mode_offset;
4155 int java_lang_AssertionStatusDirectives::classes_offset;
4156 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4157 int java_lang_AssertionStatusDirectives::packages_offset;
4158 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4159 int java_lang_AssertionStatusDirectives::deflt_offset;
4160 int java_nio_Buffer::_limit_offset;
4161 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4162 int reflect_ConstantPool::_oop_offset;
4163 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4164
4165
4166 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4167 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4168 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4169 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4170 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4171 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4172 macro(methodName_offset, k, "methodName", string_signature, false); \
4173 macro(fileName_offset, k, "fileName", string_signature, false); \
4174 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4175
4176 // Support for java_lang_StackTraceElement
4177 void java_lang_StackTraceElement::compute_offsets() {
4178 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4179 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4180 }
4181
4182 #if INCLUDE_CDS
4183 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4184 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4185 }
4186 #endif
4187
4188 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4189 element->obj_field_put(fileName_offset, value);
4190 }
4191
4192 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4193 element->obj_field_put(declaringClass_offset, value);
4194 }
4195
4196 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4197 element->obj_field_put(methodName_offset, value);
4198 }
4199
4200 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4201 element->int_field_put(lineNumber_offset, value);
4202 }
4203
4204 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4205 element->obj_field_put(moduleName_offset, value);
4206 }
4207
4208 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4209 element->obj_field_put(moduleVersion_offset, value);
4210 }
4211
4212 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4213 element->obj_field_put(classLoaderName_offset, value);
4214 }
4215
4216 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4217 element->obj_field_put(declaringClassObject_offset, value);
4218 }
4219
4220 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4221 element->short_field_put(_version_offset, value);
4222 }
4223
4224 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4225 element->int_field_put(_bci_offset, value);
4226 }
4227
4228 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4229 element->obj_field_put(_monitors_offset, value);
4230 }
4231
4232 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4233 element->obj_field_put(_locals_offset, value);
4234 }
4235
4236 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4237 element->obj_field_put(_operands_offset, value);
4238 }
4239
4240 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4241 element->int_field_put(_mode_offset, value);
4242 }
4243
4244 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4245 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4246 macro(classes_offset, k, "classes", string_array_signature, false); \
4247 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4248 macro(packages_offset, k, "packages", string_array_signature, false); \
4249 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4250 macro(deflt_offset, k, "deflt", bool_signature, false)
4251
4252 void java_lang_AssertionStatusDirectives::compute_offsets() {
4253 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4254 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4255 }
4256
4257 #if INCLUDE_CDS
4258 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4259 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4260 }
4261 #endif
4262
4263 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4264 o->obj_field_put(classes_offset, val);
4265 }
4266
4267 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4268 o->obj_field_put(classEnabled_offset, val);
4269 }
4270
4271 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4272 o->obj_field_put(packages_offset, val);
4273 }
4274
4275 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4276 o->obj_field_put(packageEnabled_offset, val);
4277 }
4278
4279 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4280 o->bool_field_put(deflt_offset, val);
4281 }
4282
4283
4284 // Support for intrinsification of java.nio.Buffer.checkIndex
4285 int java_nio_Buffer::limit_offset() {
4286 return _limit_offset;
4287 }
4288
4289 #define BUFFER_FIELDS_DO(macro) \
4290 macro(_limit_offset, k, "limit", int_signature, false)
4291
4292 void java_nio_Buffer::compute_offsets() {
4293 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4294 assert(k != NULL, "must be loaded in 1.4+");
4295 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4296 }
4297
4298 #if INCLUDE_CDS
4299 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4300 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4301 }
4302 #endif
4303
4304 #define AOS_FIELDS_DO(macro) \
4305 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4306
4307 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4308 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4309 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4310 }
4311
4312 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4313 assert(_owner_offset != 0, "Must be initialized");
4314 return obj->obj_field(_owner_offset);
4315 }
4316
4317 #if INCLUDE_CDS
4318 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4319 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4320 }
4321 #endif
4322
4323 static int member_offset(int hardcoded_offset) {
4324 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4325 }
4326
4327 // Compute hard-coded offsets
4328 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4329 // are not available to determine the offset_of_static_fields.
4330 void JavaClasses::compute_hard_coded_offsets() {
4331
4332 // java_lang_boxing_object
4333 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4334 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4335
4336 // java_lang_ref_Reference
4337 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4338 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4339 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4340 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4341 }
4342
4343 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4344
4345 // Compute non-hard-coded field offsets of all the classes in this file
4346 void JavaClasses::compute_offsets() {
4347 if (UseSharedSpaces) {
4348 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4349 JvmtiExport::has_early_class_hook_env()),
4350 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4351 // None of the classes used by the rest of this function can be replaced by
4352 // JMVTI ClassFileLoadHook.
4353 // We are safe to use the archived offsets, which have already been restored
4354 // by JavaClasses::serialize_offsets, without computing the offsets again.
4355 return;
4356 }
4357
4358 // We have already called the compute_offsets() of the
4359 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4360 // earlier inside SystemDictionary::resolve_well_known_classes()
4361 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4362
4363 // generated interpreter code wants to know about the offsets we just computed:
4364 AbstractAssembler::update_delayed_values();
4365 }
4366
4367 #if INCLUDE_CDS
4368 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4369
4370 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4371 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4372 }
4373 #endif
4374
4375
4376 #ifndef PRODUCT
4377
4378 // These functions exist to assert the validity of hard-coded field offsets to guard
4379 // against changes in the class files
4380
4381 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4382 EXCEPTION_MARK;
4383 fieldDescriptor fd;
4384 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4385 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4386 InstanceKlass* ik = InstanceKlass::cast(k);
4387 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4388 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4389 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4390 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4391 return false;
4392 }
4393 if (fd.is_static()) {
4394 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4395 return false;
4396 }
4397 if (fd.offset() == hardcoded_offset ) {
4398 return true;
4399 } else {
4400 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4401 klass_name, field_name, hardcoded_offset, fd.offset());
4402 return false;
4403 }
4404 }
4405
4406 // Check the hard-coded field offsets of all the classes in this file
4407
4408 void JavaClasses::check_offsets() {
4409 bool valid = true;
4410
4411 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4412 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4413
4414 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4415 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4416
4417 // Boxed primitive objects (java_lang_boxing_object)
4418
4419 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4420 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4421 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4422 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4423 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4424 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4425 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4426 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4427
4428 // java.lang.ref.Reference
4429
4430 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4431 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4432 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4433 // Fake field
4434 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4435
4436 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4437 }
4438
4439 #endif // PRODUCT
4440
4441 int InjectedField::compute_offset() {
4442 InstanceKlass* ik = InstanceKlass::cast(klass());
4443 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4444 if (!may_be_java && !fs.access_flags().is_internal()) {
4445 // Only look at injected fields
4446 continue;
4447 }
4448 if (fs.name() == name() && fs.signature() == signature()) {
4449 return fs.offset();
4450 }
4451 }
4452 ResourceMark rm;
4453 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)" : "");
4454 #ifndef PRODUCT
4455 ik->print();
4456 tty->print_cr("all fields:");
4457 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4458 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4459 }
4460 #endif //PRODUCT
4461 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4462 return -1;
4463 }
4464
4465 void javaClasses_init() {
4466 JavaClasses::compute_offsets();
4467 JavaClasses::check_offsets();
4468 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4469 }