1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/classLoaderData.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/debugInfo.hpp"
33 #include "code/dependencyContext.hpp"
34 #include "code/pcDesc.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "logging/log.hpp"
38 #include "logging/logStream.hpp"
39 #include "memory/heapShared.inline.hpp"
40 #include "memory/metaspaceShared.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.hpp"
44 #include "oops/fieldStreams.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/instanceMirrorKlass.hpp"
47 #include "oops/klass.hpp"
48 #include "oops/method.inline.hpp"
49 #include "oops/objArrayOop.inline.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "oops/typeArrayOop.inline.hpp"
53 #include "prims/jvmtiExport.hpp"
54 #include "prims/resolvedMethodTable.hpp"
55 #include "runtime/fieldDescriptor.inline.hpp"
56 #include "runtime/frame.inline.hpp"
57 #include "runtime/handles.inline.hpp"
58 #include "runtime/interfaceSupport.inline.hpp"
59 #include "runtime/java.hpp"
60 #include "runtime/javaCalls.hpp"
61 #include "runtime/jniHandles.inline.hpp"
62 #include "runtime/safepoint.hpp"
63 #include "runtime/safepointVerifiers.hpp"
64 #include "runtime/thread.inline.hpp"
65 #include "runtime/vframe.inline.hpp"
66 #include "utilities/align.hpp"
67 #include "utilities/preserveException.hpp"
68 #if INCLUDE_JVMCI
69 #include "jvmci/jvmciJavaClasses.hpp"
70 #endif
71
72 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
73 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
74
75 #if INCLUDE_CDS
76 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
77 f->do_u4((u4*)&_##name##_offset);
78 #endif
79
80 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
81 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
82
83 InjectedField JavaClasses::_injected_fields[] = {
84 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
85 };
86
87 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
88 return _injected_fields[id].compute_offset();
89 }
90
91 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
92 *field_count = 0;
93
94 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
95 if (sid == vmSymbols::NO_SID) {
96 // Only well known classes can inject fields
97 return NULL;
98 }
99
100 int count = 0;
101 int start = -1;
102
103 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
104 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
105 count++; \
106 if (start == -1) start = klass##_##name##_enum; \
107 }
108 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
109 #undef LOOKUP_INJECTED_FIELD
110
111 if (start != -1) {
112 *field_count = count;
113 return _injected_fields + start;
114 }
115 return NULL;
116 }
117
118
119 // Helpful routine for computing field offsets at run time rather than hardcoding them
120 // Finds local fields only, including static fields. Static field offsets are from the
121 // beginning of the mirror.
122 static void compute_offset(int &dest_offset,
123 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
124 bool is_static = false) {
125 fieldDescriptor fd;
126 if (ik == NULL) {
127 ResourceMark rm;
128 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
129 vm_exit_during_initialization("Invalid layout of well-known class");
130 }
131
132 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
133 ResourceMark rm;
134 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
135 name_symbol->as_C_string(), signature_symbol->as_C_string());
136 #ifndef PRODUCT
137 // Prints all fields and offsets
138 Log(class) lt;
139 LogStream ls(lt.error());
140 ik->print_on(&ls);
141 #endif //PRODUCT
142 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
143 }
144 dest_offset = fd.offset();
145 }
146
147 // Overloading to pass name as a string.
148 static void compute_offset(int& dest_offset, InstanceKlass* ik,
149 const char* name_string, Symbol* signature_symbol,
150 bool is_static = false) {
151 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
152 if (name == NULL) {
153 ResourceMark rm;
154 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
155 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
156 }
157 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
158 }
159
160 int java_lang_String::value_offset = 0;
161 int java_lang_String::hash_offset = 0;
162 int java_lang_String::coder_offset = 0;
163
164 bool java_lang_String::initialized = false;
165
166 bool java_lang_String::is_instance(oop obj) {
167 return is_instance_inlined(obj);
168 }
169
170 #if INCLUDE_CDS
171 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
172 f->do_u4((u4*)&offset)
173 #endif
174
175 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
176 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
177
178 #define STRING_FIELDS_DO(macro) \
179 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
180 macro(hash_offset, k, "hash", int_signature, false); \
181 macro(coder_offset, k, "coder", byte_signature, false)
182
183 void java_lang_String::compute_offsets() {
184 if (initialized) {
185 return;
186 }
187
188 InstanceKlass* k = SystemDictionary::String_klass();
189 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
190
191 initialized = true;
192 }
193
194 #if INCLUDE_CDS
195 void java_lang_String::serialize_offsets(SerializeClosure* f) {
196 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
197 f->do_u4((u4*)&initialized);
198 }
199 #endif
200
201 class CompactStringsFixup : public FieldClosure {
202 private:
203 bool _value;
204
205 public:
206 CompactStringsFixup(bool value) : _value(value) {}
207
208 void do_field(fieldDescriptor* fd) {
209 if (fd->name() == vmSymbols::compact_strings_name()) {
210 oop mirror = fd->field_holder()->java_mirror();
211 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
212 assert(mirror != NULL, "String must have mirror already");
213 mirror->bool_field_put(fd->offset(), _value);
214 }
215 }
216 };
217
218 void java_lang_String::set_compact_strings(bool value) {
219 CompactStringsFixup fix(value);
220 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
221 }
222
223 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
224 assert(initialized, "Must be initialized");
225 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
226
227 // Create the String object first, so there's a chance that the String
228 // and the char array it points to end up in the same cache line.
229 oop obj;
230 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
231
232 // Create the char array. The String object must be handlized here
233 // because GC can happen as a result of the allocation attempt.
234 Handle h_obj(THREAD, obj);
235 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
236 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
237
238 // Point the String at the char array
239 obj = h_obj();
240 set_value(obj, buffer);
241 // No need to zero the offset, allocation zero'ed the entire String object
242 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
243 return h_obj;
244 }
245
246 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
247 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
248 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
249 typeArrayOop buffer = value(h_obj());
250 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
251 if (is_latin1) {
252 for (int index = 0; index < length; index++) {
253 buffer->byte_at_put(index, (jbyte)unicode[index]);
254 }
255 } else {
256 for (int index = 0; index < length; index++) {
257 buffer->char_at_put(index, unicode[index]);
258 }
259 }
260
261 #ifdef ASSERT
262 {
263 ResourceMark rm;
264 char* expected = UNICODE::as_utf8(unicode, length);
265 char* actual = as_utf8_string(h_obj());
266 if (strcmp(expected, actual) != 0) {
267 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
268 ShouldNotReachHere();
269 }
270 }
271 #endif
272
273 return h_obj;
274 }
275
276 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
277 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
278 return h_obj();
279 }
280
281 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
282 if (utf8_str == NULL) {
283 return Handle();
284 }
285 bool has_multibyte, is_latin1;
286 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
287 if (!CompactStrings) {
288 has_multibyte = true;
289 is_latin1 = false;
290 }
291
292 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
293 if (length > 0) {
294 if (!has_multibyte) {
295 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
296 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
297 } else if (is_latin1) {
298 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
299 } else {
300 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
301 }
302 }
303
304 #ifdef ASSERT
305 // This check is too strict because the input string is not necessarily valid UTF8.
306 // For example, it may be created with arbitrary content via jni_NewStringUTF.
307 /*
308 {
309 ResourceMark rm;
310 const char* expected = utf8_str;
311 char* actual = as_utf8_string(h_obj());
312 if (strcmp(expected, actual) != 0) {
313 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
314 ShouldNotReachHere();
315 }
316 }
317 */
318 #endif
319
320 return h_obj;
321 }
322
323 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
324 Handle h_obj = create_from_str(utf8_str, CHECK_0);
325 return h_obj();
326 }
327
328 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
329 const char* utf8_str = (char*)symbol->bytes();
330 int utf8_len = symbol->utf8_length();
331
332 bool has_multibyte, is_latin1;
333 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
334 if (!CompactStrings) {
335 has_multibyte = true;
336 is_latin1 = false;
337 }
338
339 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
340 if (length > 0) {
341 if (!has_multibyte) {
342 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
343 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
344 } else if (is_latin1) {
345 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
346 } else {
347 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
348 }
349 }
350
351 #ifdef ASSERT
352 {
353 ResourceMark rm;
354 const char* expected = symbol->as_utf8();
355 char* actual = as_utf8_string(h_obj());
356 if (strncmp(expected, actual, utf8_len) != 0) {
357 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
358 ShouldNotReachHere();
359 }
360 }
361 #endif
362
363 return h_obj;
364 }
365
366 // Converts a C string to a Java String based on current encoding
367 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
368 assert(str != NULL, "bad arguments");
369
370 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
371 static to_java_string_fn_t _to_java_string_fn = NULL;
372
373 if (_to_java_string_fn == NULL) {
374 void *lib_handle = os::native_java_library();
375 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
376 if (_to_java_string_fn == NULL) {
377 fatal("NewStringPlatform missing");
378 }
379 }
380
381 jstring js = NULL;
382 { JavaThread* thread = (JavaThread*)THREAD;
383 assert(thread->is_Java_thread(), "must be java thread");
384 HandleMark hm(thread);
385 ThreadToNativeFromVM ttn(thread);
386 js = (_to_java_string_fn)(thread->jni_environment(), str);
387 }
388 return Handle(THREAD, JNIHandles::resolve(js));
389 }
390
391 // Converts a Java String to a native C string that can be used for
392 // native OS calls.
393 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
394 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
395 static to_platform_string_fn_t _to_platform_string_fn = NULL;
396
397 if (_to_platform_string_fn == NULL) {
398 void *lib_handle = os::native_java_library();
399 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
400 if (_to_platform_string_fn == NULL) {
401 fatal("GetStringPlatformChars missing");
402 }
403 }
404
405 char *native_platform_string;
406 { JavaThread* thread = (JavaThread*)THREAD;
407 assert(thread->is_Java_thread(), "must be java thread");
408 JNIEnv *env = thread->jni_environment();
409 jstring js = (jstring) JNIHandles::make_local(env, java_string());
410 bool is_copy;
411 HandleMark hm(thread);
412 ThreadToNativeFromVM ttn(thread);
413 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
414 assert(is_copy == JNI_TRUE, "is_copy value changed");
415 JNIHandles::destroy_local(js);
416 }
417 return native_platform_string;
418 }
419
420 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
421 oop obj = java_string();
422 // Typical usage is to convert all '/' to '.' in string.
423 typeArrayOop value = java_lang_String::value(obj);
424 int length = java_lang_String::length(obj);
425 bool is_latin1 = java_lang_String::is_latin1(obj);
426
427 // First check if any from_char exist
428 int index; // Declared outside, used later
429 for (index = 0; index < length; index++) {
430 jchar c = !is_latin1 ? value->char_at(index) :
431 ((jchar) value->byte_at(index)) & 0xff;
432 if (c == from_char) {
433 break;
434 }
435 }
436 if (index == length) {
437 // No from_char, so do not copy.
438 return java_string;
439 }
440
441 // Check if result string will be latin1
442 bool to_is_latin1 = false;
443
444 // Replacement char must be latin1
445 if (CompactStrings && UNICODE::is_latin1(to_char)) {
446 if (is_latin1) {
447 // Source string is latin1 as well
448 to_is_latin1 = true;
449 } else if (!UNICODE::is_latin1(from_char)) {
450 // We are replacing an UTF16 char. Scan string to
451 // check if result can be latin1 encoded.
452 to_is_latin1 = true;
453 for (index = 0; index < length; index++) {
454 jchar c = value->char_at(index);
455 if (c != from_char && !UNICODE::is_latin1(c)) {
456 to_is_latin1 = false;
457 break;
458 }
459 }
460 }
461 }
462
463 // Create new UNICODE (or byte) buffer. Must handlize value because GC
464 // may happen during String and char array creation.
465 typeArrayHandle h_value(THREAD, value);
466 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
467 typeArrayOop from_buffer = h_value();
468 typeArrayOop to_buffer = java_lang_String::value(string());
469
470 // Copy contents
471 for (index = 0; index < length; index++) {
472 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
473 ((jchar) from_buffer->byte_at(index)) & 0xff;
474 if (c == from_char) {
475 c = to_char;
476 }
477 if (!to_is_latin1) {
478 to_buffer->char_at_put(index, c);
479 } else {
480 to_buffer->byte_at_put(index, (jbyte) c);
481 }
482 }
483 return string;
484 }
485
486 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
487 typeArrayOop value = java_lang_String::value(java_string);
488 length = java_lang_String::length(java_string);
489 bool is_latin1 = java_lang_String::is_latin1(java_string);
490
491 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
492 if (result != NULL) {
493 if (!is_latin1) {
494 for (int index = 0; index < length; index++) {
495 result[index] = value->char_at(index);
496 }
497 } else {
498 for (int index = 0; index < length; index++) {
499 result[index] = ((jchar) value->byte_at(index)) & 0xff;
500 }
501 }
502 } else {
503 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
504 }
505 return result;
506 }
507
508 unsigned int java_lang_String::hash_code(oop java_string) {
509 int length = java_lang_String::length(java_string);
510 // Zero length string will hash to zero with String.hashCode() function.
511 if (length == 0) return 0;
512
513 typeArrayOop value = java_lang_String::value(java_string);
514 bool is_latin1 = java_lang_String::is_latin1(java_string);
515
516 if (is_latin1) {
517 return java_lang_String::hash_code(value->byte_at_addr(0), length);
518 } else {
519 return java_lang_String::hash_code(value->char_at_addr(0), length);
520 }
521 }
522
523 char* java_lang_String::as_quoted_ascii(oop java_string) {
524 typeArrayOop value = java_lang_String::value(java_string);
525 int length = java_lang_String::length(java_string);
526 bool is_latin1 = java_lang_String::is_latin1(java_string);
527
528 if (length == 0) return NULL;
529
530 char* result;
531 int result_length;
532 if (!is_latin1) {
533 jchar* base = value->char_at_addr(0);
534 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
535 result = NEW_RESOURCE_ARRAY(char, result_length);
536 UNICODE::as_quoted_ascii(base, length, result, result_length);
537 } else {
538 jbyte* base = value->byte_at_addr(0);
539 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
540 result = NEW_RESOURCE_ARRAY(char, result_length);
541 UNICODE::as_quoted_ascii(base, length, result, result_length);
542 }
543 assert(result_length >= length + 1, "must not be shorter");
544 assert(result_length == (int)strlen(result) + 1, "must match");
545 return result;
546 }
547
548 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
549 typeArrayOop value = java_lang_String::value(java_string);
550 int length = java_lang_String::length(java_string);
551 bool is_latin1 = java_lang_String::is_latin1(java_string);
552 if (!is_latin1) {
553 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
554 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
555 return sym;
556 } else {
557 ResourceMark rm;
558 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
559 const char* base = UNICODE::as_utf8(position, length);
560 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
561 return sym;
562 }
563 }
564
565 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
566 typeArrayOop value = java_lang_String::value(java_string);
567 int length = java_lang_String::length(java_string);
568 bool is_latin1 = java_lang_String::is_latin1(java_string);
569 if (!is_latin1) {
570 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
571 return SymbolTable::probe_unicode(base, length);
572 } else {
573 ResourceMark rm;
574 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
575 const char* base = UNICODE::as_utf8(position, length);
576 return SymbolTable::probe(base, length);
577 }
578 }
579
580 int java_lang_String::utf8_length(oop java_string) {
581 typeArrayOop value = java_lang_String::value(java_string);
582 int length = java_lang_String::length(java_string);
583 bool is_latin1 = java_lang_String::is_latin1(java_string);
584 if (length == 0) {
585 return 0;
586 }
587 if (!is_latin1) {
588 return UNICODE::utf8_length(value->char_at_addr(0), length);
589 } else {
590 return UNICODE::utf8_length(value->byte_at_addr(0), length);
591 }
592 }
593
594 char* java_lang_String::as_utf8_string(oop java_string) {
595 typeArrayOop value = java_lang_String::value(java_string);
596 int length = java_lang_String::length(java_string);
597 bool is_latin1 = java_lang_String::is_latin1(java_string);
598 if (!is_latin1) {
599 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
600 return UNICODE::as_utf8(position, length);
601 } else {
602 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
603 return UNICODE::as_utf8(position, length);
604 }
605 }
606
607 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
608 typeArrayOop value = java_lang_String::value(java_string);
609 int length = java_lang_String::length(java_string);
610 bool is_latin1 = java_lang_String::is_latin1(java_string);
611 if (!is_latin1) {
612 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
613 return UNICODE::as_utf8(position, length, buf, buflen);
614 } else {
615 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
616 return UNICODE::as_utf8(position, length, buf, buflen);
617 }
618 }
619
620 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
621 typeArrayOop value = java_lang_String::value(java_string);
622 int length = java_lang_String::length(java_string);
623 assert(start + len <= length, "just checking");
624 bool is_latin1 = java_lang_String::is_latin1(java_string);
625 if (!is_latin1) {
626 jchar* position = value->char_at_addr(start);
627 return UNICODE::as_utf8(position, len);
628 } else {
629 jbyte* position = value->byte_at_addr(start);
630 return UNICODE::as_utf8(position, len);
631 }
632 }
633
634 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
635 typeArrayOop value = java_lang_String::value(java_string);
636 int length = java_lang_String::length(java_string);
637 assert(start + len <= length, "just checking");
638 bool is_latin1 = java_lang_String::is_latin1(java_string);
639 if (!is_latin1) {
640 jchar* position = value->char_at_addr(start);
641 return UNICODE::as_utf8(position, len, buf, buflen);
642 } else {
643 jbyte* position = value->byte_at_addr(start);
644 return UNICODE::as_utf8(position, len, buf, buflen);
645 }
646 }
647
648 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
649 assert(java_string->klass() == SystemDictionary::String_klass(),
650 "must be java_string");
651 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
652 int length = java_lang_String::length(java_string);
653 if (length != len) {
654 return false;
655 }
656 bool is_latin1 = java_lang_String::is_latin1(java_string);
657 if (!is_latin1) {
658 for (int i = 0; i < len; i++) {
659 if (value->char_at(i) != chars[i]) {
660 return false;
661 }
662 }
663 } else {
664 for (int i = 0; i < len; i++) {
665 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
666 return false;
667 }
668 }
669 }
670 return true;
671 }
672
673 bool java_lang_String::equals(oop str1, oop str2) {
674 assert(str1->klass() == SystemDictionary::String_klass(),
675 "must be java String");
676 assert(str2->klass() == SystemDictionary::String_klass(),
677 "must be java String");
678 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
679 int length1 = java_lang_String::length(str1);
680 bool is_latin1 = java_lang_String::is_latin1(str1);
681 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
682 int length2 = java_lang_String::length(str2);
683 bool is_latin2 = java_lang_String::is_latin1(str2);
684
685 if ((length1 != length2) || (is_latin1 != is_latin2)) {
686 // Strings of different size or with different
687 // coders are never equal.
688 return false;
689 }
690 int blength1 = value1->length();
691 for (int i = 0; i < blength1; i++) {
692 if (value1->byte_at(i) != value2->byte_at(i)) {
693 return false;
694 }
695 }
696 return true;
697 }
698
699 void java_lang_String::print(oop java_string, outputStream* st) {
700 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
701 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
702
703 if (value == NULL) {
704 // This can happen if, e.g., printing a String
705 // object before its initializer has been called
706 st->print("NULL");
707 return;
708 }
709
710 int length = java_lang_String::length(java_string);
711 bool is_latin1 = java_lang_String::is_latin1(java_string);
712
713 st->print("\"");
714 for (int index = 0; index < length; index++) {
715 st->print("%c", (!is_latin1) ? value->char_at(index) :
716 ((jchar) value->byte_at(index)) & 0xff );
717 }
718 st->print("\"");
719 }
720
721
722 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
723 assert(mirror.not_null() && fd->is_static(), "just checking");
724 if (fd->has_initial_value()) {
725 BasicType t = fd->field_type();
726 switch (t) {
727 case T_BYTE:
728 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
729 break;
730 case T_BOOLEAN:
731 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
732 break;
733 case T_CHAR:
734 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
735 break;
736 case T_SHORT:
737 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
738 break;
739 case T_INT:
740 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
741 break;
742 case T_FLOAT:
743 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
744 break;
745 case T_DOUBLE:
746 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
747 break;
748 case T_LONG:
749 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
750 break;
751 case T_OBJECT:
752 {
753 assert(fd->signature() == vmSymbols::string_signature(),
754 "just checking");
755 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
756 // Archive the String field and update the pointer.
757 oop s = mirror()->obj_field(fd->offset());
758 oop archived_s = StringTable::create_archived_string(s, CHECK);
759 mirror()->obj_field_put(fd->offset(), archived_s);
760 } else {
761 oop string = fd->string_initial_value(CHECK);
762 mirror()->obj_field_put(fd->offset(), string);
763 }
764 }
765 break;
766 default:
767 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
768 "Illegal ConstantValue attribute in class file");
769 }
770 }
771 }
772
773
774 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
775 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
776
777 // If the offset was read from the shared archive, it was fixed up already
778 if (!k->is_shared()) {
779 if (k->is_instance_klass()) {
780 // During bootstrap, java.lang.Class wasn't loaded so static field
781 // offsets were computed without the size added it. Go back and
782 // update all the static field offsets to included the size.
783 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
784 if (fs.access_flags().is_static()) {
785 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
786 fs.set_offset(real_offset);
787 }
788 }
789 }
790 }
791
792 if (k->is_shared() && k->has_raw_archived_mirror()) {
793 if (HeapShared::open_archive_heap_region_mapped()) {
794 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
795 assert(present, "Missing archived mirror for %s", k->external_name());
796 return;
797 } else {
798 k->set_java_mirror_handle(NULL);
799 k->clear_has_raw_archived_mirror();
800 }
801 }
802 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
803 }
804
805 void java_lang_Class::initialize_mirror_fields(Klass* k,
806 Handle mirror,
807 Handle protection_domain,
808 TRAPS) {
809 // Allocate a simple java object for a lock.
810 // This needs to be a java object because during class initialization
811 // it can be held across a java call.
812 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
813 set_init_lock(mirror(), r);
814
815 // Set protection domain also
816 set_protection_domain(mirror(), protection_domain());
817
818 // Initialize static fields
819 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
820 }
821
822 // Set the java.lang.Module module field in the java_lang_Class mirror
823 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
824 if (module.is_null()) {
825 // During startup, the module may be NULL only if java.base has not been defined yet.
826 // Put the class on the fixup_module_list to patch later when the java.lang.Module
827 // for java.base is known.
828 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization");
829
830 bool javabase_was_defined = false;
831 {
832 MutexLocker m1(Module_lock, THREAD);
833 // Keep list of classes needing java.base module fixup
834 if (!ModuleEntryTable::javabase_defined()) {
835 assert(k->java_mirror() != NULL, "Class's mirror is null");
836 k->class_loader_data()->inc_keep_alive();
837 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
838 fixup_module_field_list()->push(k);
839 } else {
840 javabase_was_defined = true;
841 }
842 }
843
844 // If java.base was already defined then patch this particular class with java.base.
845 if (javabase_was_defined) {
846 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
847 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
848 "Setting class module field, " JAVA_BASE_NAME " should be defined");
849 Handle javabase_handle(THREAD, javabase_entry->module());
850 set_module(mirror(), javabase_handle());
851 }
852 } else {
853 assert(Universe::is_module_initialized() ||
854 (ModuleEntryTable::javabase_defined() &&
855 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
856 "Incorrect java.lang.Module specification while creating mirror");
857 set_module(mirror(), module());
858 }
859 }
860
861 // Statically allocate fixup lists because they always get created.
862 void java_lang_Class::allocate_fixup_lists() {
863 GrowableArray<Klass*>* mirror_list =
864 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
865 set_fixup_mirror_list(mirror_list);
866
867 GrowableArray<Klass*>* module_list =
868 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
869 set_fixup_module_field_list(module_list);
870 }
871
872 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
873 Handle module, Handle protection_domain, TRAPS) {
874 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
875 assert(k->java_mirror() == NULL, "should only assign mirror once");
876
877 // Use this moment of initialization to cache modifier_flags also,
878 // to support Class.getModifiers(). Instance classes recalculate
879 // the cached flags after the class file is parsed, but before the
880 // class is put into the system dictionary.
881 int computed_modifiers = k->compute_modifier_flags(CHECK);
882 k->set_modifier_flags(computed_modifiers);
883 // Class_klass has to be loaded because it is used to allocate
884 // the mirror.
885 if (SystemDictionary::Class_klass_loaded()) {
886 // Allocate mirror (java.lang.Class instance)
887 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
888 Handle mirror(THREAD, mirror_oop);
889 Handle comp_mirror;
890
891 // Setup indirection from mirror->klass
892 java_lang_Class::set_klass(mirror(), k);
893
894 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
895 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
896
897 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
898
899 // It might also have a component mirror. This mirror must already exist.
900 if (k->is_array_klass()) {
901 if (k->is_typeArray_klass()) {
902 BasicType type = TypeArrayKlass::cast(k)->element_type();
903 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
904 } else {
905 assert(k->is_objArray_klass(), "Must be");
906 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
907 assert(element_klass != NULL, "Must have an element klass");
908 comp_mirror = Handle(THREAD, element_klass->java_mirror());
909 }
910 assert(comp_mirror() != NULL, "must have a mirror");
911
912 // Two-way link between the array klass and its component mirror:
913 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
914 set_component_mirror(mirror(), comp_mirror());
915 // See below for ordering dependencies between field array_klass in component mirror
916 // and java_mirror in this klass.
917 } else {
918 assert(k->is_instance_klass(), "Must be");
919
920 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
921 if (HAS_PENDING_EXCEPTION) {
922 // If any of the fields throws an exception like OOM remove the klass field
923 // from the mirror so GC doesn't follow it after the klass has been deallocated.
924 // This mirror looks like a primitive type, which logically it is because it
925 // it represents no class.
926 java_lang_Class::set_klass(mirror(), NULL);
927 return;
928 }
929 }
930
931 // set the classLoader field in the java_lang_Class instance
932 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
933 set_class_loader(mirror(), class_loader());
934
935 // Setup indirection from klass->mirror
936 // after any exceptions can happen during allocations.
937 k->set_java_mirror(mirror);
938
939 // Set the module field in the java_lang_Class instance. This must be done
940 // after the mirror is set.
941 set_mirror_module_field(k, mirror, module, THREAD);
942
943 if (comp_mirror() != NULL) {
944 // Set after k->java_mirror() is published, because compiled code running
945 // concurrently doesn't expect a k to have a null java_mirror.
946 release_set_array_klass(comp_mirror(), k);
947 }
948 } else {
949 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
950 fixup_mirror_list()->push(k);
951 }
952 }
953
954 #if INCLUDE_CDS_JAVA_HEAP
955 // Clears mirror fields. Static final fields with initial values are reloaded
956 // from constant pool. The object identity hash is in the object header and is
957 // not affected.
958 class ResetMirrorField: public FieldClosure {
959 private:
960 Handle _m;
961
962 public:
963 ResetMirrorField(Handle mirror) : _m(mirror) {}
964
965 void do_field(fieldDescriptor* fd) {
966 assert(DumpSharedSpaces, "dump time only");
967 assert(_m.not_null(), "Mirror cannot be NULL");
968
969 if (fd->is_static() && fd->has_initial_value()) {
970 initialize_static_field(fd, _m, Thread::current());
971 return;
972 }
973
974 BasicType ft = fd->field_type();
975 switch (ft) {
976 case T_BYTE:
977 _m()->byte_field_put(fd->offset(), 0);
978 break;
979 case T_CHAR:
980 _m()->char_field_put(fd->offset(), 0);
981 break;
982 case T_DOUBLE:
983 _m()->double_field_put(fd->offset(), 0);
984 break;
985 case T_FLOAT:
986 _m()->float_field_put(fd->offset(), 0);
987 break;
988 case T_INT:
989 _m()->int_field_put(fd->offset(), 0);
990 break;
991 case T_LONG:
992 _m()->long_field_put(fd->offset(), 0);
993 break;
994 case T_SHORT:
995 _m()->short_field_put(fd->offset(), 0);
996 break;
997 case T_BOOLEAN:
998 _m()->bool_field_put(fd->offset(), false);
999 break;
1000 case T_ARRAY:
1001 case T_OBJECT: {
1002 // It might be useful to cache the String field, but
1003 // for now just clear out any reference field
1004 oop o = _m()->obj_field(fd->offset());
1005 _m()->obj_field_put(fd->offset(), NULL);
1006 break;
1007 }
1008 default:
1009 ShouldNotReachHere();
1010 break;
1011 }
1012 }
1013 };
1014
1015 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1016 assert(HeapShared::is_heap_object_archiving_allowed(),
1017 "HeapShared::is_heap_object_archiving_allowed() must be true");
1018
1019 for (int t = 0; t <= T_VOID; t++) {
1020 oop m = Universe::_mirrors[t];
1021 if (m != NULL) {
1022 // Update the field at _array_klass_offset to point to the relocated array klass.
1023 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1024 assert(archived_m != NULL, "sanity");
1025 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1026 assert(ak != NULL || t == T_VOID, "should not be NULL");
1027 if (ak != NULL) {
1028 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1029 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1030 }
1031
1032 // Clear the fields. Just to be safe
1033 Klass *k = m->klass();
1034 Handle archived_mirror_h(THREAD, archived_m);
1035 ResetMirrorField reset(archived_mirror_h);
1036 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1037
1038 log_trace(cds, heap, mirror)(
1039 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1040 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1041
1042 Universe::_mirrors[t] = archived_m;
1043 }
1044 }
1045
1046 assert(Universe::_mirrors[T_INT] != NULL &&
1047 Universe::_mirrors[T_FLOAT] != NULL &&
1048 Universe::_mirrors[T_DOUBLE] != NULL &&
1049 Universe::_mirrors[T_BYTE] != NULL &&
1050 Universe::_mirrors[T_BOOLEAN] != NULL &&
1051 Universe::_mirrors[T_CHAR] != NULL &&
1052 Universe::_mirrors[T_LONG] != NULL &&
1053 Universe::_mirrors[T_SHORT] != NULL &&
1054 Universe::_mirrors[T_VOID] != NULL, "sanity");
1055
1056 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1057 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1058 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1059 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1060 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1061 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1062 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1063 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1064 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1065 }
1066
1067 //
1068 // After the mirror object is successfully archived, the archived
1069 // klass is set with _has_archived_raw_mirror flag.
1070 //
1071 // The _has_archived_raw_mirror flag is cleared at runtime when the
1072 // archived mirror is restored. If archived java heap data cannot
1073 // be used at runtime, new mirror object is created for the shared
1074 // class. The _has_archived_raw_mirror is cleared also during the process.
1075 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1076 assert(HeapShared::is_heap_object_archiving_allowed(),
1077 "HeapShared::is_heap_object_archiving_allowed() must be true");
1078
1079 // Mirror is already archived
1080 if (k->has_raw_archived_mirror()) {
1081 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1082 return k->archived_java_mirror_raw();
1083 }
1084
1085 // No mirror
1086 oop mirror = k->java_mirror();
1087 if (mirror == NULL) {
1088 return NULL;
1089 }
1090
1091 if (k->is_instance_klass()) {
1092 InstanceKlass *ik = InstanceKlass::cast(k);
1093 assert(ik->signers() == NULL, "class with signer should have been excluded");
1094
1095 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1096 ik->is_shared_app_class())) {
1097 // Archiving mirror for classes from non-builtin loaders is not
1098 // supported. Clear the _java_mirror within the archived class.
1099 k->set_java_mirror_handle(NULL);
1100 return NULL;
1101 }
1102 }
1103
1104 // Now start archiving the mirror object
1105 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1106 if (archived_mirror == NULL) {
1107 return NULL;
1108 }
1109
1110 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1111 if (archived_mirror == NULL) {
1112 return NULL;
1113 }
1114
1115 k->set_archived_java_mirror_raw(archived_mirror);
1116
1117 k->set_has_raw_archived_mirror();
1118
1119 ResourceMark rm;
1120 log_trace(cds, heap, mirror)(
1121 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1122 k->external_name(), p2i(mirror), p2i(archived_mirror));
1123
1124 return archived_mirror;
1125 }
1126
1127 // The process is based on create_mirror().
1128 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1129 oop archived_mirror,
1130 Thread *THREAD) {
1131 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1132 // to archived metadata and objects below.
1133 Klass *c = archived_mirror->klass();
1134 Handle archived_mirror_h(THREAD, archived_mirror);
1135 ResetMirrorField reset(archived_mirror_h);
1136 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1137
1138 if (k->is_array_klass()) {
1139 oop archived_comp_mirror;
1140 if (k->is_typeArray_klass()) {
1141 // The primitive type mirrors are already archived. Get the archived mirror.
1142 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1143 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1144 assert(archived_comp_mirror != NULL, "Must be");
1145 } else {
1146 assert(k->is_objArray_klass(), "Must be");
1147 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1148 assert(element_klass != NULL, "Must have an element klass");
1149 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1150 if (archived_comp_mirror == NULL) {
1151 return NULL;
1152 }
1153 }
1154 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1155 } else {
1156 assert(k->is_instance_klass(), "Must be");
1157
1158 // Reset local static fields in the mirror
1159 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1160
1161 java_lang_Class:set_init_lock(archived_mirror, NULL);
1162
1163 set_protection_domain(archived_mirror, NULL);
1164 }
1165
1166 // clear class loader and mirror_module_field
1167 set_class_loader(archived_mirror, NULL);
1168 set_module(archived_mirror, NULL);
1169
1170 // The archived mirror's field at _klass_offset is still pointing to the original
1171 // klass. Updated the field in the archived mirror to point to the relocated
1172 // klass in the archive.
1173 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1174 log_debug(cds, heap, mirror)(
1175 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1176 p2i(as_Klass(mirror)), p2i(reloc_k));
1177 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1178
1179 // The field at _array_klass_offset is pointing to the original one dimension
1180 // higher array klass if exists. Relocate the pointer.
1181 Klass *arr = array_klass_acquire(mirror);
1182 if (arr != NULL) {
1183 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1184 log_debug(cds, heap, mirror)(
1185 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1186 p2i(arr), p2i(reloc_arr));
1187 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1188 }
1189 return archived_mirror;
1190 }
1191
1192 // Returns true if the mirror is updated, false if no archived mirror
1193 // data is present. After the archived mirror object is restored, the
1194 // shared klass' _has_raw_archived_mirror flag is cleared.
1195 bool java_lang_Class::restore_archived_mirror(Klass *k,
1196 Handle class_loader, Handle module,
1197 Handle protection_domain, TRAPS) {
1198 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1199 // see more details in SystemDictionary::resolve_well_known_classes().
1200 if (!SystemDictionary::Class_klass_loaded()) {
1201 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1202 fixup_mirror_list()->push(k);
1203 return true;
1204 }
1205
1206 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1207
1208 if (m == NULL) {
1209 return false;
1210 }
1211
1212 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1213
1214 // mirror is archived, restore
1215 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1216 Handle mirror(THREAD, m);
1217
1218 if (!k->is_array_klass()) {
1219 // - local static final fields with initial values were initialized at dump time
1220
1221 // create the init_lock
1222 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1223 set_init_lock(mirror(), r);
1224
1225 if (protection_domain.not_null()) {
1226 set_protection_domain(mirror(), protection_domain());
1227 }
1228 }
1229
1230 assert(class_loader() == k->class_loader(), "should be same");
1231 if (class_loader.not_null()) {
1232 set_class_loader(mirror(), class_loader());
1233 }
1234
1235 k->set_java_mirror(mirror);
1236 k->clear_has_raw_archived_mirror();
1237
1238 set_mirror_module_field(k, mirror, module, THREAD);
1239
1240 ResourceMark rm;
1241 log_trace(cds, heap, mirror)(
1242 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1243
1244 return true;
1245 }
1246 #endif // INCLUDE_CDS_JAVA_HEAP
1247
1248 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1249 assert(_module_offset != 0, "must have been computed already");
1250 java_lang_Class::set_module(k->java_mirror(), module());
1251 }
1252
1253 int java_lang_Class::oop_size(oop java_class) {
1254 assert(_oop_size_offset != 0, "must be set");
1255 int size = java_class->int_field(_oop_size_offset);
1256 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1257 return size;
1258 }
1259
1260 int java_lang_Class::oop_size_raw(oop java_class) {
1261 assert(_oop_size_offset != 0, "must be set");
1262 int size = java_class->int_field_raw(_oop_size_offset);
1263 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1264 return size;
1265 }
1266
1267 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1268 assert(_oop_size_offset != 0, "must be set");
1269 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1270 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1271 }
1272
1273 int java_lang_Class::static_oop_field_count(oop java_class) {
1274 assert(_static_oop_field_count_offset != 0, "must be set");
1275 return java_class->int_field(_static_oop_field_count_offset);
1276 }
1277
1278 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1279 assert(_static_oop_field_count_offset != 0, "must be set");
1280 return java_class->int_field_raw(_static_oop_field_count_offset);
1281 }
1282
1283 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1284 assert(_static_oop_field_count_offset != 0, "must be set");
1285 java_class->int_field_put(_static_oop_field_count_offset, size);
1286 }
1287
1288 oop java_lang_Class::protection_domain(oop java_class) {
1289 assert(_protection_domain_offset != 0, "must be set");
1290 return java_class->obj_field(_protection_domain_offset);
1291 }
1292 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1293 assert(_protection_domain_offset != 0, "must be set");
1294 java_class->obj_field_put(_protection_domain_offset, pd);
1295 }
1296
1297 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1298 assert(_component_mirror_offset != 0, "must be set");
1299 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1300 }
1301 oop java_lang_Class::component_mirror(oop java_class) {
1302 assert(_component_mirror_offset != 0, "must be set");
1303 return java_class->obj_field(_component_mirror_offset);
1304 }
1305
1306 oop java_lang_Class::init_lock(oop java_class) {
1307 assert(_init_lock_offset != 0, "must be set");
1308 return java_class->obj_field(_init_lock_offset);
1309 }
1310 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1311 assert(_init_lock_offset != 0, "must be set");
1312 java_class->obj_field_put(_init_lock_offset, init_lock);
1313 }
1314
1315 objArrayOop java_lang_Class::signers(oop java_class) {
1316 assert(_signers_offset != 0, "must be set");
1317 return (objArrayOop)java_class->obj_field(_signers_offset);
1318 }
1319 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1320 assert(_signers_offset != 0, "must be set");
1321 java_class->obj_field_put(_signers_offset, (oop)signers);
1322 }
1323
1324
1325 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1326 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1327 if (_class_loader_offset != 0) {
1328 java_class->obj_field_put(_class_loader_offset, loader);
1329 }
1330 }
1331
1332 oop java_lang_Class::class_loader(oop java_class) {
1333 assert(_class_loader_offset != 0, "must be set");
1334 return java_class->obj_field(_class_loader_offset);
1335 }
1336
1337 oop java_lang_Class::module(oop java_class) {
1338 assert(_module_offset != 0, "must be set");
1339 return java_class->obj_field(_module_offset);
1340 }
1341
1342 void java_lang_Class::set_module(oop java_class, oop module) {
1343 assert(_module_offset != 0, "must be set");
1344 java_class->obj_field_put(_module_offset, module);
1345 }
1346
1347 oop java_lang_Class::name(Handle java_class, TRAPS) {
1348 assert(_name_offset != 0, "must be set");
1349 oop o = java_class->obj_field(_name_offset);
1350 if (o == NULL) {
1351 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1352 java_class->obj_field_put(_name_offset, o);
1353 }
1354 return o;
1355 }
1356
1357 oop java_lang_Class::source_file(oop java_class) {
1358 assert(_source_file_offset != 0, "must be set");
1359 return java_class->obj_field(_source_file_offset);
1360 }
1361
1362 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1363 assert(_source_file_offset != 0, "must be set");
1364 java_class->obj_field_put(_source_file_offset, source_file);
1365 }
1366
1367 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1368 // This should be improved by adding a field at the Java level or by
1369 // introducing a new VM klass (see comment in ClassFileParser)
1370 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1371 if (type != T_VOID) {
1372 Klass* aklass = Universe::typeArrayKlassObj(type);
1373 assert(aklass != NULL, "correct bootstrap");
1374 release_set_array_klass(java_class, aklass);
1375 }
1376 #ifdef ASSERT
1377 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1378 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1379 #endif
1380 return java_class;
1381 }
1382
1383
1384 Klass* java_lang_Class::as_Klass(oop java_class) {
1385 //%note memory_2
1386 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1387 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1388 assert(k == NULL || k->is_klass(), "type check");
1389 return k;
1390 }
1391
1392 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1393 //%note memory_2
1394 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1395 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1396 assert(k == NULL || k->is_klass(), "type check");
1397 return k;
1398 }
1399
1400
1401 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1402 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1403 java_class->metadata_field_put(_klass_offset, klass);
1404 }
1405
1406
1407 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1408 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1409 Symbol* name = NULL;
1410 bool is_instance = false;
1411 if (is_primitive(java_class)) {
1412 name = vmSymbols::type_signature(primitive_type(java_class));
1413 } else {
1414 Klass* k = as_Klass(java_class);
1415 is_instance = k->is_instance_klass();
1416 name = k->name();
1417 }
1418 if (name == NULL) {
1419 st->print("<null>");
1420 return;
1421 }
1422 if (is_instance) st->print("L");
1423 st->write((char*) name->base(), (int) name->utf8_length());
1424 if (is_instance) st->print(";");
1425 }
1426
1427 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1428 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1429 Symbol* name;
1430 if (is_primitive(java_class)) {
1431 name = vmSymbols::type_signature(primitive_type(java_class));
1432 // Because this can create a new symbol, the caller has to decrement
1433 // the refcount, so make adjustment here and below for symbols returned
1434 // that are not created or incremented due to a successful lookup.
1435 name->increment_refcount();
1436 } else {
1437 Klass* k = as_Klass(java_class);
1438 if (!k->is_instance_klass()) {
1439 name = k->name();
1440 name->increment_refcount();
1441 } else {
1442 ResourceMark rm;
1443 const char* sigstr = k->signature_name();
1444 int siglen = (int) strlen(sigstr);
1445 if (!intern_if_not_found) {
1446 name = SymbolTable::probe(sigstr, siglen);
1447 } else {
1448 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1449 }
1450 }
1451 }
1452 return name;
1453 }
1454
1455 // Returns the Java name for this Java mirror (Resource allocated)
1456 // See Klass::external_name().
1457 // For primitive type Java mirrors, its type name is returned.
1458 const char* java_lang_Class::as_external_name(oop java_class) {
1459 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1460 const char* name = NULL;
1461 if (is_primitive(java_class)) {
1462 name = type2name(primitive_type(java_class));
1463 } else {
1464 name = as_Klass(java_class)->external_name();
1465 }
1466 if (name == NULL) {
1467 name = "<null>";
1468 }
1469 return name;
1470 }
1471
1472 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1473 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1474 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1475 return k;
1476 }
1477
1478
1479 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1480 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1481 java_class->release_metadata_field_put(_array_klass_offset, klass);
1482 }
1483
1484
1485 BasicType java_lang_Class::primitive_type(oop java_class) {
1486 assert(java_lang_Class::is_primitive(java_class), "just checking");
1487 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1488 BasicType type = T_VOID;
1489 if (ak != NULL) {
1490 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1491 type = ArrayKlass::cast(ak)->element_type();
1492 } else {
1493 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1494 }
1495 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1496 return type;
1497 }
1498
1499 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1500 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1501 if (is_primitive(java_class)) {
1502 if (reference_klass != NULL)
1503 (*reference_klass) = NULL;
1504 return primitive_type(java_class);
1505 } else {
1506 if (reference_klass != NULL)
1507 (*reference_klass) = as_Klass(java_class);
1508 return T_OBJECT;
1509 }
1510 }
1511
1512
1513 oop java_lang_Class::primitive_mirror(BasicType t) {
1514 oop mirror = Universe::java_mirror(t);
1515 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1516 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1517 return mirror;
1518 }
1519
1520 bool java_lang_Class::offsets_computed = false;
1521 int java_lang_Class::classRedefinedCount_offset = -1;
1522
1523 #define CLASS_FIELDS_DO(macro) \
1524 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1525 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1526 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1527 macro(_module_offset, k, "module", module_signature, false); \
1528 macro(_name_offset, k, "name", string_signature, false); \
1529
1530 void java_lang_Class::compute_offsets() {
1531 if (offsets_computed) {
1532 return;
1533 }
1534
1535 offsets_computed = true;
1536
1537 InstanceKlass* k = SystemDictionary::Class_klass();
1538 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1539
1540 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1541 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1542 // GC treats them the same.
1543 _init_lock_offset = _component_mirror_offset;
1544
1545 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1546 }
1547
1548 #if INCLUDE_CDS
1549 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1550 f->do_u4((u4*)&offsets_computed);
1551 f->do_u4((u4*)&_init_lock_offset);
1552
1553 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1554
1555 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1556 }
1557 #endif
1558
1559 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1560 if (classRedefinedCount_offset == -1) {
1561 // If we don't have an offset for it then just return -1 as a marker.
1562 return -1;
1563 }
1564
1565 return the_class_mirror->int_field(classRedefinedCount_offset);
1566 }
1567
1568 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1569 if (classRedefinedCount_offset == -1) {
1570 // If we don't have an offset for it then nothing to set.
1571 return;
1572 }
1573
1574 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1575 }
1576
1577
1578 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1579 // platform thread structure, and a eetop offset which was used for thread
1580 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1581 // merged, so in the HotSpot VM we just use the eetop field for the thread
1582 // instead of the privateInfo_offset.
1583 //
1584 // Note: The stackSize field is only present starting in 1.4.
1585
1586 int java_lang_Thread::_name_offset = 0;
1587 int java_lang_Thread::_group_offset = 0;
1588 int java_lang_Thread::_contextClassLoader_offset = 0;
1589 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1590 int java_lang_Thread::_priority_offset = 0;
1591 int java_lang_Thread::_eetop_offset = 0;
1592 int java_lang_Thread::_daemon_offset = 0;
1593 int java_lang_Thread::_stillborn_offset = 0;
1594 int java_lang_Thread::_stackSize_offset = 0;
1595 int java_lang_Thread::_tid_offset = 0;
1596 int java_lang_Thread::_thread_status_offset = 0;
1597 int java_lang_Thread::_park_blocker_offset = 0;
1598 int java_lang_Thread::_park_event_offset = 0 ;
1599
1600 #define THREAD_FIELDS_DO(macro) \
1601 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1602 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1603 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1604 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1605 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1606 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1607 macro(_eetop_offset, k, "eetop", long_signature, false); \
1608 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1609 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1610 macro(_tid_offset, k, "tid", long_signature, false); \
1611 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1612 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1613 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1614
1615 void java_lang_Thread::compute_offsets() {
1616 assert(_group_offset == 0, "offsets should be initialized only once");
1617
1618 InstanceKlass* k = SystemDictionary::Thread_klass();
1619 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1620 }
1621
1622 #if INCLUDE_CDS
1623 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1624 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1625 }
1626 #endif
1627
1628 JavaThread* java_lang_Thread::thread(oop java_thread) {
1629 return (JavaThread*)java_thread->address_field(_eetop_offset);
1630 }
1631
1632
1633 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1634 java_thread->address_field_put(_eetop_offset, (address)thread);
1635 }
1636
1637
1638 oop java_lang_Thread::name(oop java_thread) {
1639 return java_thread->obj_field(_name_offset);
1640 }
1641
1642
1643 void java_lang_Thread::set_name(oop java_thread, oop name) {
1644 java_thread->obj_field_put(_name_offset, name);
1645 }
1646
1647
1648 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1649 return (ThreadPriority)java_thread->int_field(_priority_offset);
1650 }
1651
1652
1653 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1654 java_thread->int_field_put(_priority_offset, priority);
1655 }
1656
1657
1658 oop java_lang_Thread::threadGroup(oop java_thread) {
1659 return java_thread->obj_field(_group_offset);
1660 }
1661
1662
1663 bool java_lang_Thread::is_stillborn(oop java_thread) {
1664 return java_thread->bool_field(_stillborn_offset) != 0;
1665 }
1666
1667
1668 // We never have reason to turn the stillborn bit off
1669 void java_lang_Thread::set_stillborn(oop java_thread) {
1670 java_thread->bool_field_put(_stillborn_offset, true);
1671 }
1672
1673
1674 bool java_lang_Thread::is_alive(oop java_thread) {
1675 JavaThread* thr = java_lang_Thread::thread(java_thread);
1676 return (thr != NULL);
1677 }
1678
1679
1680 bool java_lang_Thread::is_daemon(oop java_thread) {
1681 return java_thread->bool_field(_daemon_offset) != 0;
1682 }
1683
1684
1685 void java_lang_Thread::set_daemon(oop java_thread) {
1686 java_thread->bool_field_put(_daemon_offset, true);
1687 }
1688
1689 oop java_lang_Thread::context_class_loader(oop java_thread) {
1690 return java_thread->obj_field(_contextClassLoader_offset);
1691 }
1692
1693 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1694 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1695 }
1696
1697
1698 jlong java_lang_Thread::stackSize(oop java_thread) {
1699 if (_stackSize_offset > 0) {
1700 return java_thread->long_field(_stackSize_offset);
1701 } else {
1702 return 0;
1703 }
1704 }
1705
1706 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1707 void java_lang_Thread::set_thread_status(oop java_thread,
1708 java_lang_Thread::ThreadStatus status) {
1709 // The threadStatus is only present starting in 1.5
1710 if (_thread_status_offset > 0) {
1711 java_thread->int_field_put(_thread_status_offset, status);
1712 }
1713 }
1714
1715 // Read thread status value from threadStatus field in java.lang.Thread java class.
1716 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1717 // Make sure the caller is operating on behalf of the VM or is
1718 // running VM code (state == _thread_in_vm).
1719 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1720 JavaThread::current()->thread_state() == _thread_in_vm,
1721 "Java Thread is not running in vm");
1722 // The threadStatus is only present starting in 1.5
1723 if (_thread_status_offset > 0) {
1724 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1725 } else {
1726 // All we can easily figure out is if it is alive, but that is
1727 // enough info for a valid unknown status.
1728 // These aren't restricted to valid set ThreadStatus values, so
1729 // use JVMTI values and cast.
1730 JavaThread* thr = java_lang_Thread::thread(java_thread);
1731 if (thr == NULL) {
1732 // the thread hasn't run yet or is in the process of exiting
1733 return NEW;
1734 }
1735 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1736 }
1737 }
1738
1739
1740 jlong java_lang_Thread::thread_id(oop java_thread) {
1741 // The thread ID field is only present starting in 1.5
1742 if (_tid_offset > 0) {
1743 return java_thread->long_field(_tid_offset);
1744 } else {
1745 return 0;
1746 }
1747 }
1748
1749 oop java_lang_Thread::park_blocker(oop java_thread) {
1750 assert(JDK_Version::current().supports_thread_park_blocker() &&
1751 _park_blocker_offset != 0, "Must support parkBlocker field");
1752
1753 if (_park_blocker_offset > 0) {
1754 return java_thread->obj_field(_park_blocker_offset);
1755 }
1756
1757 return NULL;
1758 }
1759
1760 jlong java_lang_Thread::park_event(oop java_thread) {
1761 if (_park_event_offset > 0) {
1762 return java_thread->long_field(_park_event_offset);
1763 }
1764 return 0;
1765 }
1766
1767 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1768 if (_park_event_offset > 0) {
1769 java_thread->long_field_put(_park_event_offset, ptr);
1770 return true;
1771 }
1772 return false;
1773 }
1774
1775
1776 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1777 assert(_thread_status_offset != 0, "Must have thread status");
1778 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1779 switch (status) {
1780 case NEW : return "NEW";
1781 case RUNNABLE : return "RUNNABLE";
1782 case SLEEPING : return "TIMED_WAITING (sleeping)";
1783 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1784 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1785 case PARKED : return "WAITING (parking)";
1786 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1787 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1788 case TERMINATED : return "TERMINATED";
1789 default : return "UNKNOWN";
1790 };
1791 }
1792 int java_lang_ThreadGroup::_parent_offset = 0;
1793 int java_lang_ThreadGroup::_name_offset = 0;
1794 int java_lang_ThreadGroup::_threads_offset = 0;
1795 int java_lang_ThreadGroup::_groups_offset = 0;
1796 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1797 int java_lang_ThreadGroup::_destroyed_offset = 0;
1798 int java_lang_ThreadGroup::_daemon_offset = 0;
1799 int java_lang_ThreadGroup::_nthreads_offset = 0;
1800 int java_lang_ThreadGroup::_ngroups_offset = 0;
1801
1802 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1803 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1804 return java_thread_group->obj_field(_parent_offset);
1805 }
1806
1807 // ("name as oop" accessor is not necessary)
1808
1809 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1810 oop name = java_thread_group->obj_field(_name_offset);
1811 // ThreadGroup.name can be null
1812 if (name != NULL) {
1813 return java_lang_String::as_utf8_string(name);
1814 }
1815 return NULL;
1816 }
1817
1818 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1819 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1820 return java_thread_group->int_field(_nthreads_offset);
1821 }
1822
1823 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1824 oop threads = java_thread_group->obj_field(_threads_offset);
1825 assert(threads != NULL, "threadgroups should have threads");
1826 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1827 return objArrayOop(threads);
1828 }
1829
1830 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1831 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1832 return java_thread_group->int_field(_ngroups_offset);
1833 }
1834
1835 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1836 oop groups = java_thread_group->obj_field(_groups_offset);
1837 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1838 return objArrayOop(groups);
1839 }
1840
1841 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1842 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1843 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1844 }
1845
1846 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1847 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1848 return java_thread_group->bool_field(_destroyed_offset) != 0;
1849 }
1850
1851 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1852 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1853 return java_thread_group->bool_field(_daemon_offset) != 0;
1854 }
1855
1856 #define THREADGROUP_FIELDS_DO(macro) \
1857 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1858 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1859 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1860 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1861 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1862 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1863 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1864 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1865 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1866
1867 void java_lang_ThreadGroup::compute_offsets() {
1868 assert(_parent_offset == 0, "offsets should be initialized only once");
1869
1870 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1871 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1872 }
1873
1874 #if INCLUDE_CDS
1875 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1876 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1877 }
1878 #endif
1879
1880 #define THROWABLE_FIELDS_DO(macro) \
1881 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1882 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1883 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1884 macro(depth_offset, k, "depth", int_signature, false); \
1885 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1886
1887 void java_lang_Throwable::compute_offsets() {
1888 InstanceKlass* k = SystemDictionary::Throwable_klass();
1889 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1890 }
1891
1892 #if INCLUDE_CDS
1893 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1894 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1895 }
1896 #endif
1897
1898 oop java_lang_Throwable::unassigned_stacktrace() {
1899 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1900 oop base = ik->static_field_base_raw();
1901 return base->obj_field(static_unassigned_stacktrace_offset);
1902 }
1903
1904 oop java_lang_Throwable::backtrace(oop throwable) {
1905 return throwable->obj_field_acquire(backtrace_offset);
1906 }
1907
1908
1909 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1910 throwable->release_obj_field_put(backtrace_offset, value);
1911 }
1912
1913 int java_lang_Throwable::depth(oop throwable) {
1914 return throwable->int_field(depth_offset);
1915 }
1916
1917 void java_lang_Throwable::set_depth(oop throwable, int value) {
1918 throwable->int_field_put(depth_offset, value);
1919 }
1920
1921 oop java_lang_Throwable::message(oop throwable) {
1922 return throwable->obj_field(detailMessage_offset);
1923 }
1924
1925
1926 // Return Symbol for detailed_message or NULL
1927 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1928 PRESERVE_EXCEPTION_MARK; // Keep original exception
1929 oop detailed_message = java_lang_Throwable::message(throwable);
1930 if (detailed_message != NULL) {
1931 return java_lang_String::as_symbol(detailed_message, THREAD);
1932 }
1933 return NULL;
1934 }
1935
1936 void java_lang_Throwable::set_message(oop throwable, oop value) {
1937 throwable->obj_field_put(detailMessage_offset, value);
1938 }
1939
1940
1941 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1942 throwable->obj_field_put(stackTrace_offset, st_element_array);
1943 }
1944
1945 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1946 set_stacktrace(throwable, NULL);
1947 }
1948
1949
1950 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1951 ResourceMark rm;
1952 Klass* k = throwable->klass();
1953 assert(k != NULL, "just checking");
1954 st->print("%s", k->external_name());
1955 oop msg = message(throwable);
1956 if (msg != NULL) {
1957 st->print(": %s", java_lang_String::as_utf8_string(msg));
1958 }
1959 }
1960
1961 // After this many redefines, the stack trace is unreliable.
1962 const int MAX_VERSION = USHRT_MAX;
1963
1964 static inline bool version_matches(Method* method, int version) {
1965 assert(version < MAX_VERSION, "version is too big");
1966 return method != NULL && (method->constants()->version() == version);
1967 }
1968
1969
1970 // This class provides a simple wrapper over the internal structure of
1971 // exception backtrace to insulate users of the backtrace from needing
1972 // to know what it looks like.
1973 class BacktraceBuilder: public StackObj {
1974 friend class BacktraceIterator;
1975 private:
1976 Handle _backtrace;
1977 objArrayOop _head;
1978 typeArrayOop _methods;
1979 typeArrayOop _bcis;
1980 objArrayOop _mirrors;
1981 typeArrayOop _names; // needed to insulate method name against redefinition
1982 int _index;
1983 NoSafepointVerifier _nsv;
1984
1985 enum {
1986 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1987 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1988 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1989 trace_names_offset = java_lang_Throwable::trace_names_offset,
1990 trace_next_offset = java_lang_Throwable::trace_next_offset,
1991 trace_size = java_lang_Throwable::trace_size,
1992 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1993 };
1994
1995 // get info out of chunks
1996 static typeArrayOop get_methods(objArrayHandle chunk) {
1997 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1998 assert(methods != NULL, "method array should be initialized in backtrace");
1999 return methods;
2000 }
2001 static typeArrayOop get_bcis(objArrayHandle chunk) {
2002 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2003 assert(bcis != NULL, "bci array should be initialized in backtrace");
2004 return bcis;
2005 }
2006 static objArrayOop get_mirrors(objArrayHandle chunk) {
2007 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2008 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2009 return mirrors;
2010 }
2011 static typeArrayOop get_names(objArrayHandle chunk) {
2012 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2013 assert(names != NULL, "names array should be initialized in backtrace");
2014 return names;
2015 }
2016
2017 public:
2018
2019 // constructor for new backtrace
2020 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2021 expand(CHECK);
2022 _backtrace = Handle(THREAD, _head);
2023 _index = 0;
2024 }
2025
2026 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2027 _methods = get_methods(backtrace);
2028 _bcis = get_bcis(backtrace);
2029 _mirrors = get_mirrors(backtrace);
2030 _names = get_names(backtrace);
2031 assert(_methods->length() == _bcis->length() &&
2032 _methods->length() == _mirrors->length() &&
2033 _mirrors->length() == _names->length(),
2034 "method and source information arrays should match");
2035
2036 // head is the preallocated backtrace
2037 _head = backtrace();
2038 _backtrace = Handle(thread, _head);
2039 _index = 0;
2040 }
2041
2042 void expand(TRAPS) {
2043 objArrayHandle old_head(THREAD, _head);
2044 PauseNoSafepointVerifier pnsv(&_nsv);
2045
2046 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2047 objArrayHandle new_head(THREAD, head);
2048
2049 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2050 typeArrayHandle new_methods(THREAD, methods);
2051
2052 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2053 typeArrayHandle new_bcis(THREAD, bcis);
2054
2055 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2056 objArrayHandle new_mirrors(THREAD, mirrors);
2057
2058 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2059 typeArrayHandle new_names(THREAD, names);
2060
2061 if (!old_head.is_null()) {
2062 old_head->obj_at_put(trace_next_offset, new_head());
2063 }
2064 new_head->obj_at_put(trace_methods_offset, new_methods());
2065 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2066 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2067 new_head->obj_at_put(trace_names_offset, new_names());
2068
2069 _head = new_head();
2070 _methods = new_methods();
2071 _bcis = new_bcis();
2072 _mirrors = new_mirrors();
2073 _names = new_names();
2074 _index = 0;
2075 }
2076
2077 oop backtrace() {
2078 return _backtrace();
2079 }
2080
2081 inline void push(Method* method, int bci, TRAPS) {
2082 // Smear the -1 bci to 0 since the array only holds unsigned
2083 // shorts. The later line number lookup would just smear the -1
2084 // to a 0 even if it could be recorded.
2085 if (bci == SynchronizationEntryBCI) bci = 0;
2086
2087 if (_index >= trace_chunk_size) {
2088 methodHandle mhandle(THREAD, method);
2089 expand(CHECK);
2090 method = mhandle();
2091 }
2092
2093 _methods->ushort_at_put(_index, method->orig_method_idnum());
2094 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2095
2096 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2097 // klass owning the symbols alive so their refcounts aren't decremented.
2098 Symbol* name = method->name();
2099 _names->symbol_at_put(_index, name);
2100
2101 // We need to save the mirrors in the backtrace to keep the class
2102 // from being unloaded while we still have this stack trace.
2103 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2104 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2105 _index++;
2106 }
2107
2108 };
2109
2110 struct BacktraceElement : public StackObj {
2111 int _method_id;
2112 int _bci;
2113 int _version;
2114 Symbol* _name;
2115 Handle _mirror;
2116 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2117 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2118 };
2119
2120 class BacktraceIterator : public StackObj {
2121 int _index;
2122 objArrayHandle _result;
2123 objArrayHandle _mirrors;
2124 typeArrayHandle _methods;
2125 typeArrayHandle _bcis;
2126 typeArrayHandle _names;
2127
2128 void init(objArrayHandle result, Thread* thread) {
2129 // Get method id, bci, version and mirror from chunk
2130 _result = result;
2131 if (_result.not_null()) {
2132 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2133 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2134 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2135 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2136 _index = 0;
2137 }
2138 }
2139 public:
2140 BacktraceIterator(objArrayHandle result, Thread* thread) {
2141 init(result, thread);
2142 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2143 }
2144
2145 BacktraceElement next(Thread* thread) {
2146 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2147 _methods->ushort_at(_index),
2148 Backtrace::version_at(_bcis->int_at(_index)),
2149 Backtrace::bci_at(_bcis->int_at(_index)),
2150 _names->symbol_at(_index));
2151 _index++;
2152
2153 if (_index >= java_lang_Throwable::trace_chunk_size) {
2154 int next_offset = java_lang_Throwable::trace_next_offset;
2155 // Get next chunk
2156 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2157 init(result, thread);
2158 }
2159 return e;
2160 }
2161
2162 bool repeat() {
2163 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2164 }
2165 };
2166
2167
2168 // Print stack trace element to resource allocated buffer
2169 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2170 int version, int bci, Symbol* name) {
2171 ResourceMark rm;
2172
2173 // Get strings and string lengths
2174 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2175 const char* klass_name = holder->external_name();
2176 int buf_len = (int)strlen(klass_name);
2177
2178 char* method_name = name->as_C_string();
2179 buf_len += (int)strlen(method_name);
2180
2181 char* source_file_name = NULL;
2182 Symbol* source = Backtrace::get_source_file_name(holder, version);
2183 if (source != NULL) {
2184 source_file_name = source->as_C_string();
2185 buf_len += (int)strlen(source_file_name);
2186 }
2187
2188 char *module_name = NULL, *module_version = NULL;
2189 ModuleEntry* module = holder->module();
2190 if (module->is_named()) {
2191 module_name = module->name()->as_C_string();
2192 buf_len += (int)strlen(module_name);
2193 if (module->version() != NULL) {
2194 module_version = module->version()->as_C_string();
2195 buf_len += (int)strlen(module_version);
2196 }
2197 }
2198
2199 // Allocate temporary buffer with extra space for formatting and line number
2200 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2201
2202 // Print stack trace line in buffer
2203 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2204
2205 // Print module information
2206 if (module_name != NULL) {
2207 if (module_version != NULL) {
2208 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2209 } else {
2210 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2211 }
2212 }
2213
2214 // The method can be NULL if the requested class version is gone
2215 Method* method = holder->method_with_orig_idnum(method_id, version);
2216 if (!version_matches(method, version)) {
2217 strcat(buf, "Redefined)");
2218 } else {
2219 int line_number = Backtrace::get_line_number(method, bci);
2220 if (line_number == -2) {
2221 strcat(buf, "Native Method)");
2222 } else {
2223 if (source_file_name != NULL && (line_number != -1)) {
2224 // Sourcename and linenumber
2225 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2226 } else if (source_file_name != NULL) {
2227 // Just sourcename
2228 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2229 } else {
2230 // Neither sourcename nor linenumber
2231 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2232 }
2233 CompiledMethod* nm = method->code();
2234 if (WizardMode && nm != NULL) {
2235 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2236 }
2237 }
2238 }
2239
2240 st->print_cr("%s", buf);
2241 }
2242
2243 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2244 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2245 int method_id = method->orig_method_idnum();
2246 int version = method->constants()->version();
2247 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2248 }
2249
2250 /**
2251 * Print the throwable message and its stack trace plus all causes by walking the
2252 * cause chain. The output looks the same as of Throwable.printStackTrace().
2253 */
2254 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2255 // First, print the message.
2256 print(throwable(), st);
2257 st->cr();
2258
2259 // Now print the stack trace.
2260 Thread* THREAD = Thread::current();
2261 while (throwable.not_null()) {
2262 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2263 if (result.is_null()) {
2264 st->print_raw_cr("\t<<no stack trace available>>");
2265 return;
2266 }
2267 BacktraceIterator iter(result, THREAD);
2268
2269 while (iter.repeat()) {
2270 BacktraceElement bte = iter.next(THREAD);
2271 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2272 }
2273 {
2274 // Call getCause() which doesn't necessarily return the _cause field.
2275 EXCEPTION_MARK;
2276 JavaValue cause(T_OBJECT);
2277 JavaCalls::call_virtual(&cause,
2278 throwable,
2279 throwable->klass(),
2280 vmSymbols::getCause_name(),
2281 vmSymbols::void_throwable_signature(),
2282 THREAD);
2283 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2284 if (HAS_PENDING_EXCEPTION) {
2285 CLEAR_PENDING_EXCEPTION;
2286 throwable = Handle();
2287 } else {
2288 throwable = Handle(THREAD, (oop) cause.get_jobject());
2289 if (throwable.not_null()) {
2290 st->print("Caused by: ");
2291 print(throwable(), st);
2292 st->cr();
2293 }
2294 }
2295 }
2296 }
2297 }
2298
2299 /**
2300 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2301 */
2302 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2303 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2304 JavaValue result(T_VOID);
2305 JavaCalls::call_virtual(&result,
2306 throwable,
2307 SystemDictionary::Throwable_klass(),
2308 vmSymbols::printStackTrace_name(),
2309 vmSymbols::void_method_signature(),
2310 THREAD);
2311 }
2312
2313 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2314 if (!StackTraceInThrowable) return;
2315 ResourceMark rm(THREAD);
2316
2317 // Start out by clearing the backtrace for this object, in case the VM
2318 // runs out of memory while allocating the stack trace
2319 set_backtrace(throwable(), NULL);
2320 // Clear lazily constructed Java level stacktrace if refilling occurs
2321 // This is unnecessary in 1.7+ but harmless
2322 clear_stacktrace(throwable());
2323
2324 int max_depth = MaxJavaStackTraceDepth;
2325 JavaThread* thread = (JavaThread*)THREAD;
2326
2327 BacktraceBuilder bt(CHECK);
2328
2329 // If there is no Java frame just return the method that was being called
2330 // with bci 0
2331 if (!thread->has_last_Java_frame()) {
2332 if (max_depth >= 1 && method() != NULL) {
2333 bt.push(method(), 0, CHECK);
2334 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2335 set_depth(throwable(), 1);
2336 set_backtrace(throwable(), bt.backtrace());
2337 }
2338 return;
2339 }
2340
2341 // Instead of using vframe directly, this version of fill_in_stack_trace
2342 // basically handles everything by hand. This significantly improved the
2343 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2344 // See bug 6333838 for more details.
2345 // The "ASSERT" here is to verify this method generates the exactly same stack
2346 // trace as utilizing vframe.
2347 #ifdef ASSERT
2348 vframeStream st(thread);
2349 methodHandle st_method(THREAD, st.method());
2350 #endif
2351 int total_count = 0;
2352 RegisterMap map(thread, false);
2353 int decode_offset = 0;
2354 CompiledMethod* nm = NULL;
2355 bool skip_fillInStackTrace_check = false;
2356 bool skip_throwableInit_check = false;
2357 bool skip_hidden = !ShowHiddenFrames;
2358
2359 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2360 Method* method = NULL;
2361 int bci = 0;
2362
2363 // Compiled java method case.
2364 if (decode_offset != 0) {
2365 DebugInfoReadStream stream(nm, decode_offset);
2366 decode_offset = stream.read_int();
2367 method = (Method*)nm->metadata_at(stream.read_int());
2368 bci = stream.read_bci();
2369 } else {
2370 if (fr.is_first_frame()) break;
2371 address pc = fr.pc();
2372 if (fr.is_interpreted_frame()) {
2373 address bcp = fr.interpreter_frame_bcp();
2374 method = fr.interpreter_frame_method();
2375 bci = method->bci_from(bcp);
2376 fr = fr.sender(&map);
2377 } else {
2378 CodeBlob* cb = fr.cb();
2379 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2380 // but non nmethod
2381 fr = fr.sender(&map);
2382 if (cb == NULL || !cb->is_compiled()) {
2383 continue;
2384 }
2385 nm = cb->as_compiled_method();
2386 if (nm->method()->is_native()) {
2387 method = nm->method();
2388 bci = 0;
2389 } else {
2390 PcDesc* pd = nm->pc_desc_at(pc);
2391 decode_offset = pd->scope_decode_offset();
2392 // if decode_offset is not equal to 0, it will execute the
2393 // "compiled java method case" at the beginning of the loop.
2394 continue;
2395 }
2396 }
2397 }
2398 #ifdef ASSERT
2399 assert(st_method() == method && st.bci() == bci,
2400 "Wrong stack trace");
2401 st.next();
2402 // vframeStream::method isn't GC-safe so store off a copy
2403 // of the Method* in case we GC.
2404 if (!st.at_end()) {
2405 st_method = st.method();
2406 }
2407 #endif
2408
2409 // the format of the stacktrace will be:
2410 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2411 // - 0 or more <init> methods for the exception class (skipped)
2412 // - rest of the stack
2413
2414 if (!skip_fillInStackTrace_check) {
2415 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2416 throwable->is_a(method->method_holder())) {
2417 continue;
2418 }
2419 else {
2420 skip_fillInStackTrace_check = true; // gone past them all
2421 }
2422 }
2423 if (!skip_throwableInit_check) {
2424 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2425
2426 // skip <init> methods of the exception class and superclasses
2427 // This is simlar to classic VM.
2428 if (method->name() == vmSymbols::object_initializer_name() &&
2429 throwable->is_a(method->method_holder())) {
2430 continue;
2431 } else {
2432 // there are none or we've seen them all - either way stop checking
2433 skip_throwableInit_check = true;
2434 }
2435 }
2436 if (method->is_hidden()) {
2437 if (skip_hidden) continue;
2438 }
2439 bt.push(method, bci, CHECK);
2440 total_count++;
2441 }
2442
2443 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2444
2445 // Put completed stack trace into throwable object
2446 set_backtrace(throwable(), bt.backtrace());
2447 set_depth(throwable(), total_count);
2448 }
2449
2450 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2451 // No-op if stack trace is disabled
2452 if (!StackTraceInThrowable) {
2453 return;
2454 }
2455
2456 // Disable stack traces for some preallocated out of memory errors
2457 if (!Universe::should_fill_in_stack_trace(throwable)) {
2458 return;
2459 }
2460
2461 PRESERVE_EXCEPTION_MARK;
2462
2463 JavaThread* thread = JavaThread::active();
2464 fill_in_stack_trace(throwable, method, thread);
2465 // ignore exceptions thrown during stack trace filling
2466 CLEAR_PENDING_EXCEPTION;
2467 }
2468
2469 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2470 // Allocate stack trace - backtrace is created but not filled in
2471
2472 // No-op if stack trace is disabled
2473 if (!StackTraceInThrowable) return;
2474 BacktraceBuilder bt(CHECK); // creates a backtrace
2475 set_backtrace(throwable(), bt.backtrace());
2476 }
2477
2478
2479 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2480 // Fill in stack trace into preallocated backtrace (no GC)
2481
2482 // No-op if stack trace is disabled
2483 if (!StackTraceInThrowable) return;
2484
2485 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2486
2487 JavaThread* THREAD = JavaThread::current();
2488
2489 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2490 assert(backtrace.not_null(), "backtrace should have been preallocated");
2491
2492 ResourceMark rm(THREAD);
2493 vframeStream st(THREAD);
2494
2495 BacktraceBuilder bt(THREAD, backtrace);
2496
2497 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2498 // methods as preallocated errors aren't created by "java" code.
2499
2500 // fill in as much stack trace as possible
2501 int chunk_count = 0;
2502 for (;!st.at_end(); st.next()) {
2503 bt.push(st.method(), st.bci(), CHECK);
2504 chunk_count++;
2505
2506 // Bail-out for deep stacks
2507 if (chunk_count >= trace_chunk_size) break;
2508 }
2509 set_depth(throwable(), chunk_count);
2510 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2511
2512 // We support the Throwable immutability protocol defined for Java 7.
2513 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2514 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2515 }
2516
2517 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2518 objArrayHandle stack_trace_array_h, TRAPS) {
2519
2520 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2521 THROW(vmSymbols::java_lang_NullPointerException());
2522 }
2523
2524 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2525
2526 if (stack_trace_array_h->length() != depth(throwable())) {
2527 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2528 }
2529
2530 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2531 BacktraceIterator iter(result, THREAD);
2532
2533 int index = 0;
2534 while (iter.repeat()) {
2535 BacktraceElement bte = iter.next(THREAD);
2536
2537 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2538
2539 if (stack_trace_element.is_null()) {
2540 THROW(vmSymbols::java_lang_NullPointerException());
2541 }
2542
2543 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2544 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2545
2546 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2547 method,
2548 bte._version,
2549 bte._bci,
2550 bte._name, CHECK);
2551 }
2552 }
2553
2554 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2555 // Allocate java.lang.StackTraceElement instance
2556 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2557 assert(k != NULL, "must be loaded in 1.4+");
2558 if (k->should_be_initialized()) {
2559 k->initialize(CHECK_0);
2560 }
2561
2562 Handle element = k->allocate_instance_handle(CHECK_0);
2563
2564 int version = method->constants()->version();
2565 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2566 return element();
2567 }
2568
2569 void java_lang_StackTraceElement::fill_in(Handle element,
2570 InstanceKlass* holder, const methodHandle& method,
2571 int version, int bci, Symbol* name, TRAPS) {
2572 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2573
2574 ResourceMark rm(THREAD);
2575 HandleMark hm(THREAD);
2576
2577 // Fill in class name
2578 Handle java_class(THREAD, holder->java_mirror());
2579 oop classname = java_lang_Class::name(java_class, CHECK);
2580 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2581 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2582
2583 oop loader = holder->class_loader();
2584 if (loader != NULL) {
2585 oop loader_name = java_lang_ClassLoader::name(loader);
2586 if (loader_name != NULL)
2587 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2588 }
2589
2590 // Fill in method name
2591 oop methodname = StringTable::intern(name, CHECK);
2592 java_lang_StackTraceElement::set_methodName(element(), methodname);
2593
2594 // Fill in module name and version
2595 ModuleEntry* module = holder->module();
2596 if (module->is_named()) {
2597 oop module_name = java_lang_Module::name(module->module());
2598 assert(module_name != NULL, "module name is set");
2599 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2600 oop module_version;
2601 if (module->version() != NULL) {
2602 oop md = java_lang_Module::module_descriptor(module->module());
2603 assert(md != NULL, "module descriptor is set");
2604 oop mdv = java_lang_module_ModuleDescriptor::version(md);
2605 if (mdv != NULL) {
2606 module_version = java_lang_module_ModuleDescriptor_Version::version(mdv);
2607 } else {
2608 module_version = java_lang_module_ModuleDescriptor::raw_version(md);
2609 }
2610 assert(module_version != NULL, "module version string is set");
2611 } else {
2612 module_version = NULL;
2613 }
2614 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2615 }
2616
2617 if (method() == NULL || !version_matches(method(), version)) {
2618 // The method was redefined, accurate line number information isn't available
2619 java_lang_StackTraceElement::set_fileName(element(), NULL);
2620 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2621 } else {
2622 // Fill in source file name and line number.
2623 Symbol* source = Backtrace::get_source_file_name(holder, version);
2624 oop source_file = java_lang_Class::source_file(java_class());
2625 if (source != NULL) {
2626 // Class was not redefined. We can trust its cache if set,
2627 // else we have to initialize it.
2628 if (source_file == NULL) {
2629 source_file = StringTable::intern(source, CHECK);
2630 java_lang_Class::set_source_file(java_class(), source_file);
2631 }
2632 } else {
2633 // Class was redefined. Dump the cache if it was set.
2634 if (source_file != NULL) {
2635 source_file = NULL;
2636 java_lang_Class::set_source_file(java_class(), source_file);
2637 }
2638 if (ShowHiddenFrames) {
2639 source = vmSymbols::unknown_class_name();
2640 source_file = StringTable::intern(source, CHECK);
2641 }
2642 }
2643 java_lang_StackTraceElement::set_fileName(element(), source_file);
2644
2645 int line_number = Backtrace::get_line_number(method, bci);
2646 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2647 }
2648 }
2649
2650 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2651 HandleMark hm(THREAD);
2652 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2653 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2654 // we should expand MemberName::name when Throwable uses StackTrace
2655 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2656 return method;
2657 }
2658
2659 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2660 // set Method* or mid/cpref
2661 HandleMark hm(THREAD);
2662 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2663 InstanceKlass* ik = method->method_holder();
2664 CallInfo info(method(), ik, CHECK);
2665 MethodHandles::init_method_MemberName(mname, info);
2666 // set bci
2667 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2668 // method may be redefined; store the version
2669 int version = method->constants()->version();
2670 assert((jushort)version == version, "version should be short");
2671 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2672 }
2673
2674 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2675 ResourceMark rm(THREAD);
2676 HandleMark hm(THREAD);
2677 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2678 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2679 InstanceKlass* holder = InstanceKlass::cast(clazz);
2680 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2681
2682 short version = stackFrame->short_field(_version_offset);
2683 short bci = stackFrame->short_field(_bci_offset);
2684 Symbol* name = method->name();
2685 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2686 }
2687
2688 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2689 macro(_memberName_offset, k, "memberName", object_signature, false); \
2690 macro(_bci_offset, k, "bci", short_signature, false)
2691
2692 void java_lang_StackFrameInfo::compute_offsets() {
2693 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2694 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2695 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2696 }
2697
2698 #if INCLUDE_CDS
2699 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2700 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2701 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2702 }
2703 #endif
2704
2705 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2706 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2707 macro(_locals_offset, k, "locals", object_array_signature, false); \
2708 macro(_operands_offset, k, "operands", object_array_signature, false); \
2709 macro(_mode_offset, k, "mode", int_signature, false)
2710
2711 void java_lang_LiveStackFrameInfo::compute_offsets() {
2712 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2713 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2714 }
2715
2716 #if INCLUDE_CDS
2717 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2718 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2719 }
2720 #endif
2721
2722 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2723 macro(override_offset, k, "override", bool_signature, false)
2724
2725 void java_lang_reflect_AccessibleObject::compute_offsets() {
2726 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2727 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2728 }
2729
2730 #if INCLUDE_CDS
2731 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2732 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2733 }
2734 #endif
2735
2736 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2738 return (jboolean) reflect->bool_field(override_offset);
2739 }
2740
2741 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2742 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2743 reflect->bool_field_put(override_offset, (int) value);
2744 }
2745
2746 #define METHOD_FIELDS_DO(macro) \
2747 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2748 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2749 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2750 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2751 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2752 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2753 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2754 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2755 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2756 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2757 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2758
2759 void java_lang_reflect_Method::compute_offsets() {
2760 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2761 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2762 }
2763
2764 #if INCLUDE_CDS
2765 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2766 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2767 }
2768 #endif
2769
2770 Handle java_lang_reflect_Method::create(TRAPS) {
2771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2772 Klass* klass = SystemDictionary::reflect_Method_klass();
2773 // This class is eagerly initialized during VM initialization, since we keep a refence
2774 // to one of the methods
2775 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2776 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2777 }
2778
2779 oop java_lang_reflect_Method::clazz(oop reflect) {
2780 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2781 return reflect->obj_field(clazz_offset);
2782 }
2783
2784 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2786 reflect->obj_field_put(clazz_offset, value);
2787 }
2788
2789 int java_lang_reflect_Method::slot(oop reflect) {
2790 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2791 return reflect->int_field(slot_offset);
2792 }
2793
2794 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2795 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2796 reflect->int_field_put(slot_offset, value);
2797 }
2798
2799 void java_lang_reflect_Method::set_name(oop method, oop value) {
2800 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2801 method->obj_field_put(name_offset, value);
2802 }
2803
2804 oop java_lang_reflect_Method::return_type(oop method) {
2805 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2806 return method->obj_field(returnType_offset);
2807 }
2808
2809 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2810 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2811 method->obj_field_put(returnType_offset, value);
2812 }
2813
2814 oop java_lang_reflect_Method::parameter_types(oop method) {
2815 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2816 return method->obj_field(parameterTypes_offset);
2817 }
2818
2819 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2820 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2821 method->obj_field_put(parameterTypes_offset, value);
2822 }
2823
2824 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2825 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2826 method->obj_field_put(exceptionTypes_offset, value);
2827 }
2828
2829 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2830 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2831 method->int_field_put(modifiers_offset, value);
2832 }
2833
2834 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2835 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2836 method->obj_field_put(signature_offset, value);
2837 }
2838
2839 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2840 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2841 method->obj_field_put(annotations_offset, value);
2842 }
2843
2844 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2845 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2846 method->obj_field_put(parameter_annotations_offset, value);
2847 }
2848
2849 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2850 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2851 method->obj_field_put(annotation_default_offset, value);
2852 }
2853
2854 #define CONSTRUCTOR_FIELDS_DO(macro) \
2855 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2856 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2857 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2858 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2859 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2860 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2861 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2862 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2863
2864 void java_lang_reflect_Constructor::compute_offsets() {
2865 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2866 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2867 }
2868
2869 #if INCLUDE_CDS
2870 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2871 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2872 }
2873 #endif
2874
2875 Handle java_lang_reflect_Constructor::create(TRAPS) {
2876 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2877 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2878 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2879 InstanceKlass* ik = InstanceKlass::cast(k);
2880 // Ensure it is initialized
2881 ik->initialize(CHECK_NH);
2882 return ik->allocate_instance_handle(THREAD);
2883 }
2884
2885 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2886 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2887 return reflect->obj_field(clazz_offset);
2888 }
2889
2890 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2892 reflect->obj_field_put(clazz_offset, value);
2893 }
2894
2895 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2897 return constructor->obj_field(parameterTypes_offset);
2898 }
2899
2900 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2902 constructor->obj_field_put(parameterTypes_offset, value);
2903 }
2904
2905 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2906 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2907 constructor->obj_field_put(exceptionTypes_offset, value);
2908 }
2909
2910 int java_lang_reflect_Constructor::slot(oop reflect) {
2911 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2912 return reflect->int_field(slot_offset);
2913 }
2914
2915 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2916 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2917 reflect->int_field_put(slot_offset, value);
2918 }
2919
2920 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2921 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2922 constructor->int_field_put(modifiers_offset, value);
2923 }
2924
2925 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2926 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2927 constructor->obj_field_put(signature_offset, value);
2928 }
2929
2930 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2931 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2932 constructor->obj_field_put(annotations_offset, value);
2933 }
2934
2935 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2936 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2937 method->obj_field_put(parameter_annotations_offset, value);
2938 }
2939
2940 #define FIELD_FIELDS_DO(macro) \
2941 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2942 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2943 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
2944 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2945 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2946 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2947 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
2948
2949 void java_lang_reflect_Field::compute_offsets() {
2950 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
2951 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2952 }
2953
2954 #if INCLUDE_CDS
2955 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
2956 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2957 }
2958 #endif
2959
2960 Handle java_lang_reflect_Field::create(TRAPS) {
2961 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2962 Symbol* name = vmSymbols::java_lang_reflect_Field();
2963 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2964 InstanceKlass* ik = InstanceKlass::cast(k);
2965 // Ensure it is initialized
2966 ik->initialize(CHECK_NH);
2967 return ik->allocate_instance_handle(THREAD);
2968 }
2969
2970 oop java_lang_reflect_Field::clazz(oop reflect) {
2971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2972 return reflect->obj_field(clazz_offset);
2973 }
2974
2975 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2977 reflect->obj_field_put(clazz_offset, value);
2978 }
2979
2980 oop java_lang_reflect_Field::name(oop field) {
2981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2982 return field->obj_field(name_offset);
2983 }
2984
2985 void java_lang_reflect_Field::set_name(oop field, oop value) {
2986 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2987 field->obj_field_put(name_offset, value);
2988 }
2989
2990 oop java_lang_reflect_Field::type(oop field) {
2991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2992 return field->obj_field(type_offset);
2993 }
2994
2995 void java_lang_reflect_Field::set_type(oop field, oop value) {
2996 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2997 field->obj_field_put(type_offset, value);
2998 }
2999
3000 int java_lang_reflect_Field::slot(oop reflect) {
3001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3002 return reflect->int_field(slot_offset);
3003 }
3004
3005 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3007 reflect->int_field_put(slot_offset, value);
3008 }
3009
3010 int java_lang_reflect_Field::modifiers(oop field) {
3011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3012 return field->int_field(modifiers_offset);
3013 }
3014
3015 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3017 field->int_field_put(modifiers_offset, value);
3018 }
3019
3020 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3022 field->obj_field_put(signature_offset, value);
3023 }
3024
3025 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3026 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3027 field->obj_field_put(annotations_offset, value);
3028 }
3029
3030 #define CONSTANTPOOL_FIELDS_DO(macro) \
3031 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3032
3033 void reflect_ConstantPool::compute_offsets() {
3034 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3035 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3036 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3037 }
3038
3039 #if INCLUDE_CDS
3040 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3041 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3042 }
3043 #endif
3044
3045 #define PARAMETER_FIELDS_DO(macro) \
3046 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3047 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3048 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3049 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3050
3051 void java_lang_reflect_Parameter::compute_offsets() {
3052 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3053 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3054 }
3055
3056 #if INCLUDE_CDS
3057 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3058 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3059 }
3060 #endif
3061
3062 Handle java_lang_reflect_Parameter::create(TRAPS) {
3063 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3064 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3065 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3066 InstanceKlass* ik = InstanceKlass::cast(k);
3067 // Ensure it is initialized
3068 ik->initialize(CHECK_NH);
3069 return ik->allocate_instance_handle(THREAD);
3070 }
3071
3072 oop java_lang_reflect_Parameter::name(oop param) {
3073 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3074 return param->obj_field(name_offset);
3075 }
3076
3077 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3079 param->obj_field_put(name_offset, value);
3080 }
3081
3082 int java_lang_reflect_Parameter::modifiers(oop param) {
3083 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3084 return param->int_field(modifiers_offset);
3085 }
3086
3087 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3088 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3089 param->int_field_put(modifiers_offset, value);
3090 }
3091
3092 int java_lang_reflect_Parameter::index(oop param) {
3093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3094 return param->int_field(index_offset);
3095 }
3096
3097 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3098 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3099 param->int_field_put(index_offset, value);
3100 }
3101
3102 oop java_lang_reflect_Parameter::executable(oop param) {
3103 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3104 return param->obj_field(executable_offset);
3105 }
3106
3107 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3108 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3109 param->obj_field_put(executable_offset, value);
3110 }
3111
3112
3113 int java_lang_Module::loader_offset;
3114 int java_lang_Module::name_offset;
3115 int java_lang_Module::module_descriptor_offset;
3116 int java_lang_Module::_module_entry_offset = -1;
3117
3118 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3119 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3120 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3121 vmSymbols::java_lang_module_init_signature(),
3122 loader, module_name, CHECK_NH);
3123 }
3124
3125 #define MODULE_FIELDS_DO(macro) \
3126 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3127 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3128 macro(module_descriptor_offset, k, vmSymbols::descriptor_name(), module_descriptor_signature, false); \
3129
3130 void java_lang_Module::compute_offsets() {
3131 InstanceKlass* k = SystemDictionary::Module_klass();
3132 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3133 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3134 }
3135
3136 #if INCLUDE_CDS
3137 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3138 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3139 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3140 }
3141 #endif
3142
3143 oop java_lang_Module::loader(oop module) {
3144 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3145 return module->obj_field(loader_offset);
3146 }
3147
3148 void java_lang_Module::set_loader(oop module, oop value) {
3149 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3150 module->obj_field_put(loader_offset, value);
3151 }
3152
3153 oop java_lang_Module::name(oop module) {
3154 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3155 return module->obj_field(name_offset);
3156 }
3157
3158 void java_lang_Module::set_name(oop module, oop value) {
3159 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3160 module->obj_field_put(name_offset, value);
3161 }
3162
3163 oop java_lang_Module::module_descriptor(oop module) {
3164 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3165 assert(java_lang_Module::is_instance(module), "sanity");
3166 return module->obj_field(module_descriptor_offset);
3167 }
3168
3169 ModuleEntry* java_lang_Module::module_entry(oop module) {
3170 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3171 assert(module != NULL, "module can't be null");
3172 assert(oopDesc::is_oop(module), "module must be oop");
3173
3174 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3175 if (module_entry == NULL) {
3176 // If the inject field containing the ModuleEntry* is null then return the
3177 // class loader's unnamed module.
3178 oop loader = java_lang_Module::loader(module);
3179 Handle h_loader = Handle(Thread::current(), loader);
3180 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3181 return loader_cld->unnamed_module();
3182 }
3183 return module_entry;
3184 }
3185
3186 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3187 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3188 assert(module != NULL, "module can't be null");
3189 assert(oopDesc::is_oop(module), "module must be oop");
3190 module->address_field_put(_module_entry_offset, (address)module_entry);
3191 }
3192
3193 int java_lang_module_ModuleDescriptor::version_offset;
3194 int java_lang_module_ModuleDescriptor::raw_version_offset;
3195
3196 #define MODULE_DESCRIPTOR_FIELDS_DO(macro) \
3197 macro(version_offset, k, vmSymbols::version_name(), module_descriptor_version_signature, false); \
3198 macro(raw_version_offset, k, vmSymbols::raw_version_string_name(), string_signature, false); \
3199
3200 void java_lang_module_ModuleDescriptor::compute_offsets() {
3201 InstanceKlass* k = SystemDictionary::ModuleDescriptor_klass();
3202 MODULE_DESCRIPTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3203 }
3204
3205 #if INCLUDE_CDS
3206 void java_lang_module_ModuleDescriptor::serialize_offsets(SerializeClosure* f) {
3207 MODULE_DESCRIPTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3208 }
3209 #endif
3210
3211 inline bool java_lang_module_ModuleDescriptor::is_instance(oop obj) {
3212 return obj != NULL && obj->klass() == SystemDictionary::ModuleDescriptor_klass();
3213 }
3214
3215 oop java_lang_module_ModuleDescriptor::version(oop module_descriptor) {
3216 assert(java_lang_module_ModuleDescriptor::is_instance(module_descriptor), "sanity");
3217 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3218 return module_descriptor->obj_field(version_offset);
3219 }
3220
3221 oop java_lang_module_ModuleDescriptor::raw_version(oop module_descriptor) {
3222 assert(java_lang_module_ModuleDescriptor::is_instance(module_descriptor), "sanity");
3223 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3224 return module_descriptor->obj_field(raw_version_offset);
3225 }
3226
3227 int java_lang_module_ModuleDescriptor_Version::version_offset;
3228
3229 #define MODULE_DESCRIPTOR_VERSION_FIELDS_DO(macro) \
3230 macro(version_offset, k, vmSymbols::version_name(), string_signature, false); \
3231
3232 void java_lang_module_ModuleDescriptor_Version::compute_offsets() {
3233 InstanceKlass* k = SystemDictionary::ModuleDescriptor_Version_klass();
3234 MODULE_DESCRIPTOR_VERSION_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3235 }
3236
3237 #if INCLUDE_CDS
3238 void java_lang_module_ModuleDescriptor_Version::serialize_offsets(SerializeClosure* f) {
3239 MODULE_DESCRIPTOR_VERSION_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3240 }
3241 #endif
3242
3243 inline bool java_lang_module_ModuleDescriptor_Version::is_instance(oop obj) {
3244 return obj != NULL && obj->klass() == SystemDictionary::ModuleDescriptor_Version_klass();
3245 }
3246
3247 oop java_lang_module_ModuleDescriptor_Version::version(oop module_descriptor_version) {
3248 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3249 assert(java_lang_module_ModuleDescriptor_Version::is_instance(module_descriptor_version), "sanity");
3250 return module_descriptor_version->obj_field(version_offset);
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(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::_init_lock_offset;
4084 int java_lang_Class::_signers_offset;
4085 int java_lang_Class::_name_offset;
4086 int java_lang_Class::_source_file_offset;
4087 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4088 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4089 int java_lang_Throwable::backtrace_offset;
4090 int java_lang_Throwable::detailMessage_offset;
4091 int java_lang_Throwable::stackTrace_offset;
4092 int java_lang_Throwable::depth_offset;
4093 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4094 int java_lang_reflect_AccessibleObject::override_offset;
4095 int java_lang_reflect_Method::clazz_offset;
4096 int java_lang_reflect_Method::name_offset;
4097 int java_lang_reflect_Method::returnType_offset;
4098 int java_lang_reflect_Method::parameterTypes_offset;
4099 int java_lang_reflect_Method::exceptionTypes_offset;
4100 int java_lang_reflect_Method::slot_offset;
4101 int java_lang_reflect_Method::modifiers_offset;
4102 int java_lang_reflect_Method::signature_offset;
4103 int java_lang_reflect_Method::annotations_offset;
4104 int java_lang_reflect_Method::parameter_annotations_offset;
4105 int java_lang_reflect_Method::annotation_default_offset;
4106 int java_lang_reflect_Constructor::clazz_offset;
4107 int java_lang_reflect_Constructor::parameterTypes_offset;
4108 int java_lang_reflect_Constructor::exceptionTypes_offset;
4109 int java_lang_reflect_Constructor::slot_offset;
4110 int java_lang_reflect_Constructor::modifiers_offset;
4111 int java_lang_reflect_Constructor::signature_offset;
4112 int java_lang_reflect_Constructor::annotations_offset;
4113 int java_lang_reflect_Constructor::parameter_annotations_offset;
4114 int java_lang_reflect_Field::clazz_offset;
4115 int java_lang_reflect_Field::name_offset;
4116 int java_lang_reflect_Field::type_offset;
4117 int java_lang_reflect_Field::slot_offset;
4118 int java_lang_reflect_Field::modifiers_offset;
4119 int java_lang_reflect_Field::signature_offset;
4120 int java_lang_reflect_Field::annotations_offset;
4121 int java_lang_reflect_Parameter::name_offset;
4122 int java_lang_reflect_Parameter::modifiers_offset;
4123 int java_lang_reflect_Parameter::index_offset;
4124 int java_lang_reflect_Parameter::executable_offset;
4125 int java_lang_boxing_object::value_offset;
4126 int java_lang_boxing_object::long_value_offset;
4127 int java_lang_ref_Reference::referent_offset;
4128 int java_lang_ref_Reference::queue_offset;
4129 int java_lang_ref_Reference::next_offset;
4130 int java_lang_ref_Reference::discovered_offset;
4131 int java_lang_ref_SoftReference::timestamp_offset;
4132 int java_lang_ref_SoftReference::static_clock_offset;
4133 int java_lang_ClassLoader::parent_offset;
4134 int java_lang_System::static_in_offset;
4135 int java_lang_System::static_out_offset;
4136 int java_lang_System::static_err_offset;
4137 int java_lang_System::static_security_offset;
4138 int java_lang_StackTraceElement::methodName_offset;
4139 int java_lang_StackTraceElement::fileName_offset;
4140 int java_lang_StackTraceElement::lineNumber_offset;
4141 int java_lang_StackTraceElement::moduleName_offset;
4142 int java_lang_StackTraceElement::moduleVersion_offset;
4143 int java_lang_StackTraceElement::classLoaderName_offset;
4144 int java_lang_StackTraceElement::declaringClass_offset;
4145 int java_lang_StackTraceElement::declaringClassObject_offset;
4146 int java_lang_StackFrameInfo::_memberName_offset;
4147 int java_lang_StackFrameInfo::_bci_offset;
4148 int java_lang_StackFrameInfo::_version_offset;
4149 int java_lang_LiveStackFrameInfo::_monitors_offset;
4150 int java_lang_LiveStackFrameInfo::_locals_offset;
4151 int java_lang_LiveStackFrameInfo::_operands_offset;
4152 int java_lang_LiveStackFrameInfo::_mode_offset;
4153 int java_lang_AssertionStatusDirectives::classes_offset;
4154 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4155 int java_lang_AssertionStatusDirectives::packages_offset;
4156 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4157 int java_lang_AssertionStatusDirectives::deflt_offset;
4158 int java_nio_Buffer::_limit_offset;
4159 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4160 int reflect_ConstantPool::_oop_offset;
4161 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4162
4163
4164 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4165 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4166 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4167 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4168 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4169 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4170 macro(methodName_offset, k, "methodName", string_signature, false); \
4171 macro(fileName_offset, k, "fileName", string_signature, false); \
4172 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4173
4174 // Support for java_lang_StackTraceElement
4175 void java_lang_StackTraceElement::compute_offsets() {
4176 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4177 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4178 }
4179
4180 #if INCLUDE_CDS
4181 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4182 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4183 }
4184 #endif
4185
4186 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4187 element->obj_field_put(fileName_offset, value);
4188 }
4189
4190 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4191 element->obj_field_put(declaringClass_offset, value);
4192 }
4193
4194 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4195 element->obj_field_put(methodName_offset, value);
4196 }
4197
4198 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4199 element->int_field_put(lineNumber_offset, value);
4200 }
4201
4202 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4203 element->obj_field_put(moduleName_offset, value);
4204 }
4205
4206 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4207 element->obj_field_put(moduleVersion_offset, value);
4208 }
4209
4210 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4211 element->obj_field_put(classLoaderName_offset, value);
4212 }
4213
4214 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4215 element->obj_field_put(declaringClassObject_offset, value);
4216 }
4217
4218 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4219 element->short_field_put(_version_offset, value);
4220 }
4221
4222 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4223 element->int_field_put(_bci_offset, value);
4224 }
4225
4226 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4227 element->obj_field_put(_monitors_offset, value);
4228 }
4229
4230 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4231 element->obj_field_put(_locals_offset, value);
4232 }
4233
4234 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4235 element->obj_field_put(_operands_offset, value);
4236 }
4237
4238 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4239 element->int_field_put(_mode_offset, value);
4240 }
4241
4242 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4243 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4244 macro(classes_offset, k, "classes", string_array_signature, false); \
4245 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4246 macro(packages_offset, k, "packages", string_array_signature, false); \
4247 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4248 macro(deflt_offset, k, "deflt", bool_signature, false)
4249
4250 void java_lang_AssertionStatusDirectives::compute_offsets() {
4251 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4252 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4253 }
4254
4255 #if INCLUDE_CDS
4256 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4257 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4258 }
4259 #endif
4260
4261 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4262 o->obj_field_put(classes_offset, val);
4263 }
4264
4265 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4266 o->obj_field_put(classEnabled_offset, val);
4267 }
4268
4269 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4270 o->obj_field_put(packages_offset, val);
4271 }
4272
4273 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4274 o->obj_field_put(packageEnabled_offset, val);
4275 }
4276
4277 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4278 o->bool_field_put(deflt_offset, val);
4279 }
4280
4281
4282 // Support for intrinsification of java.nio.Buffer.checkIndex
4283 int java_nio_Buffer::limit_offset() {
4284 return _limit_offset;
4285 }
4286
4287 #define BUFFER_FIELDS_DO(macro) \
4288 macro(_limit_offset, k, "limit", int_signature, false)
4289
4290 void java_nio_Buffer::compute_offsets() {
4291 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4292 assert(k != NULL, "must be loaded in 1.4+");
4293 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4294 }
4295
4296 #if INCLUDE_CDS
4297 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4298 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4299 }
4300 #endif
4301
4302 #define AOS_FIELDS_DO(macro) \
4303 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4304
4305 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4306 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4307 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4308 }
4309
4310 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4311 assert(_owner_offset != 0, "Must be initialized");
4312 return obj->obj_field(_owner_offset);
4313 }
4314
4315 #if INCLUDE_CDS
4316 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4317 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4318 }
4319 #endif
4320
4321 static int member_offset(int hardcoded_offset) {
4322 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4323 }
4324
4325 // Compute hard-coded offsets
4326 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4327 // are not available to determine the offset_of_static_fields.
4328 void JavaClasses::compute_hard_coded_offsets() {
4329
4330 // java_lang_boxing_object
4331 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4332 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4333
4334 // java_lang_ref_Reference
4335 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4336 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4337 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4338 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4339 }
4340
4341 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4342
4343 // Compute non-hard-coded field offsets of all the classes in this file
4344 void JavaClasses::compute_offsets() {
4345 if (UseSharedSpaces) {
4346 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4347 JvmtiExport::has_early_class_hook_env()),
4348 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4349 // None of the classes used by the rest of this function can be replaced by
4350 // JMVTI ClassFileLoadHook.
4351 // We are safe to use the archived offsets, which have already been restored
4352 // by JavaClasses::serialize_offsets, without computing the offsets again.
4353 return;
4354 }
4355
4356 // We have already called the compute_offsets() of the
4357 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4358 // earlier inside SystemDictionary::resolve_well_known_classes()
4359 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4360
4361 // generated interpreter code wants to know about the offsets we just computed:
4362 AbstractAssembler::update_delayed_values();
4363 }
4364
4365 #if INCLUDE_CDS
4366 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4367
4368 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4369 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4370 }
4371 #endif
4372
4373
4374 #ifndef PRODUCT
4375
4376 // These functions exist to assert the validity of hard-coded field offsets to guard
4377 // against changes in the class files
4378
4379 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4380 EXCEPTION_MARK;
4381 fieldDescriptor fd;
4382 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4383 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4384 InstanceKlass* ik = InstanceKlass::cast(k);
4385 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4386 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4387 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4388 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4389 return false;
4390 }
4391 if (fd.is_static()) {
4392 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4393 return false;
4394 }
4395 if (fd.offset() == hardcoded_offset ) {
4396 return true;
4397 } else {
4398 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4399 klass_name, field_name, hardcoded_offset, fd.offset());
4400 return false;
4401 }
4402 }
4403
4404 // Check the hard-coded field offsets of all the classes in this file
4405
4406 void JavaClasses::check_offsets() {
4407 bool valid = true;
4408
4409 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4410 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4411
4412 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4413 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4414
4415 // Boxed primitive objects (java_lang_boxing_object)
4416
4417 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4418 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4419 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4420 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4421 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4422 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4423 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4424 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4425
4426 // java.lang.ref.Reference
4427
4428 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4429 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4430 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4431 // Fake field
4432 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4433
4434 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4435 }
4436
4437 #endif // PRODUCT
4438
4439 int InjectedField::compute_offset() {
4440 InstanceKlass* ik = InstanceKlass::cast(klass());
4441 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4442 if (!may_be_java && !fs.access_flags().is_internal()) {
4443 // Only look at injected fields
4444 continue;
4445 }
4446 if (fs.name() == name() && fs.signature() == signature()) {
4447 return fs.offset();
4448 }
4449 }
4450 ResourceMark rm;
4451 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)" : "");
4452 #ifndef PRODUCT
4453 ik->print();
4454 tty->print_cr("all fields:");
4455 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4456 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4457 }
4458 #endif //PRODUCT
4459 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4460 return -1;
4461 }
4462
4463 void javaClasses_init() {
4464 JavaClasses::compute_offsets();
4465 JavaClasses::check_offsets();
4466 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4467 }