1 /*
2 * Copyright (c) 1997, 2018, 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/oopFactory.hpp"
40 #include "memory/metaspaceShared.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "memory/universe.hpp"
43 #include "oops/fieldStreams.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceMirrorKlass.hpp"
46 #include "oops/klass.hpp"
47 #include "oops/method.inline.hpp"
48 #include "oops/objArrayOop.inline.hpp"
49 #include "oops/oop.inline.hpp"
50 #include "oops/symbol.hpp"
51 #include "oops/typeArrayOop.inline.hpp"
52 #include "prims/resolvedMethodTable.hpp"
53 #include "runtime/fieldDescriptor.inline.hpp"
54 #include "runtime/frame.inline.hpp"
55 #include "runtime/handles.inline.hpp"
56 #include "runtime/interfaceSupport.inline.hpp"
57 #include "runtime/java.hpp"
58 #include "runtime/javaCalls.hpp"
59 #include "runtime/jniHandles.inline.hpp"
60 #include "runtime/safepoint.hpp"
61 #include "runtime/safepointVerifiers.hpp"
62 #include "runtime/thread.inline.hpp"
63 #include "runtime/vframe.inline.hpp"
64 #include "utilities/align.hpp"
65 #include "utilities/preserveException.hpp"
66 #if INCLUDE_JVMCI
67 #include "jvmci/jvmciJavaClasses.hpp"
68 #endif
69
70 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
71 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
72
73 #if INCLUDE_CDS
74 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
75 f->do_u4((u4*)&_##name##_offset);
76 #endif
77
78 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
79 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
80
81 InjectedField JavaClasses::_injected_fields[] = {
82 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
83 };
84
85 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
86 return _injected_fields[id].compute_offset();
87 }
88
89
90 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
91 *field_count = 0;
92
93 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
94 if (sid == vmSymbols::NO_SID) {
95 // Only well known classes can inject fields
96 return NULL;
97 }
98
99 int count = 0;
100 int start = -1;
101
102 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
103 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
104 count++; \
105 if (start == -1) start = klass##_##name##_enum; \
106 }
107 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
108 #undef LOOKUP_INJECTED_FIELD
109
110 if (start != -1) {
111 *field_count = count;
112 return _injected_fields + start;
113 }
114 return NULL;
115 }
116
117
118 // Helpful routine for computing field offsets at run time rather than hardcoding them
119 // Finds local fields only, including static fields. Static field offsets are from the
120 // beginning of the mirror.
121 static void compute_offset(int &dest_offset,
122 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
123 bool is_static = false) {
124 fieldDescriptor fd;
125 if (ik == NULL) {
126 ResourceMark rm;
127 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
128 vm_exit_during_initialization("Invalid layout of preloaded class");
129 }
130
131 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
132 ResourceMark rm;
133 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
134 name_symbol->as_C_string(), signature_symbol->as_C_string());
135 #ifndef PRODUCT
136 // Prints all fields and offsets
137 Log(class) lt;
138 LogStream ls(lt.error());
139 ik->print_on(&ls);
140 #endif //PRODUCT
141 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
142 }
143 dest_offset = fd.offset();
144 }
145
146 // Overloading to pass name as a string.
147 static void compute_offset(int& dest_offset, InstanceKlass* ik,
148 const char* name_string, Symbol* signature_symbol,
149 bool is_static = false) {
150 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
151 if (name == NULL) {
152 ResourceMark rm;
153 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
154 vm_exit_during_initialization("Invalid layout of preloaded class", ik->external_name());
155 }
156 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
157 }
158
159 // Same as above but for "optional" offsets that might not be present in certain JDK versions
160 // Old versions should be cleaned out since Hotspot only supports the current JDK, and this
161 // function should be removed.
162 static void
163 compute_optional_offset(int& dest_offset,
164 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol) {
165 fieldDescriptor fd;
166 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) {
167 dest_offset = fd.offset();
168 }
169 }
170
171 int java_lang_String::value_offset = 0;
172 int java_lang_String::hash_offset = 0;
173 int java_lang_String::coder_offset = 0;
174
175 bool java_lang_String::initialized = false;
176
177 bool java_lang_String::is_instance(oop obj) {
178 return is_instance_inlined(obj);
179 }
180
181 #if INCLUDE_CDS
182 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
183 f->do_u4((u4*)&offset)
184
185 #define FIELD_SERIALIZE_OFFSET_OPTIONAL(offset, klass, name, signature) \
186 f->do_u4((u4*)&offset)
187 #endif
188
189 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
190 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
191
192 #define FIELD_COMPUTE_OFFSET_OPTIONAL(offset, klass, name, signature) \
193 compute_optional_offset(offset, klass, name, vmSymbols::signature())
194
195 #define STRING_FIELDS_DO(macro) \
196 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
197 macro(hash_offset, k, "hash", int_signature, false); \
198 macro(coder_offset, k, "coder", byte_signature, false)
199
200 void java_lang_String::compute_offsets() {
201 if (initialized) {
202 return;
203 }
204
205 InstanceKlass* k = SystemDictionary::String_klass();
206 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
207
208 initialized = true;
209 }
210
211 #if INCLUDE_CDS
212 void java_lang_String::serialize_offsets(SerializeClosure* f) {
213 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
214 f->do_u4((u4*)&initialized);
215 }
216 #endif
217
218 class CompactStringsFixup : public FieldClosure {
219 private:
220 bool _value;
221
222 public:
223 CompactStringsFixup(bool value) : _value(value) {}
224
225 void do_field(fieldDescriptor* fd) {
226 if (fd->name() == vmSymbols::compact_strings_name()) {
227 oop mirror = fd->field_holder()->java_mirror();
228 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
229 assert(mirror != NULL, "String must have mirror already");
230 mirror->bool_field_put(fd->offset(), _value);
231 }
232 }
233 };
234
235 void java_lang_String::set_compact_strings(bool value) {
236 CompactStringsFixup fix(value);
237 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
238 }
239
240 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
241 assert(initialized, "Must be initialized");
242 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
243
244 // Create the String object first, so there's a chance that the String
245 // and the char array it points to end up in the same cache line.
246 oop obj;
247 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
248
249 // Create the char array. The String object must be handlized here
250 // because GC can happen as a result of the allocation attempt.
251 Handle h_obj(THREAD, obj);
252 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
253 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
254
255 // Point the String at the char array
256 obj = h_obj();
257 set_value(obj, buffer);
258 // No need to zero the offset, allocation zero'ed the entire String object
259 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
260 return h_obj;
261 }
262
263 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
264 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
265 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
266 typeArrayOop buffer = value(h_obj());
267 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
268 if (is_latin1) {
269 for (int index = 0; index < length; index++) {
270 buffer->byte_at_put(index, (jbyte)unicode[index]);
271 }
272 } else {
273 for (int index = 0; index < length; index++) {
274 buffer->char_at_put(index, unicode[index]);
275 }
276 }
277
278 #ifdef ASSERT
279 {
280 ResourceMark rm;
281 char* expected = UNICODE::as_utf8(unicode, length);
282 char* actual = as_utf8_string(h_obj());
283 if (strcmp(expected, actual) != 0) {
284 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
285 ShouldNotReachHere();
286 }
287 }
288 #endif
289
290 return h_obj;
291 }
292
293 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
294 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
295 return h_obj();
296 }
297
298 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
299 if (utf8_str == NULL) {
300 return Handle();
301 }
302 bool has_multibyte, is_latin1;
303 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
304 if (!CompactStrings) {
305 has_multibyte = true;
306 is_latin1 = false;
307 }
308
309 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
310 if (length > 0) {
311 if (!has_multibyte) {
312 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
313 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
314 } else if (is_latin1) {
315 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
316 } else {
317 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
318 }
319 }
320
321 #ifdef ASSERT
322 // This check is too strict because the input string is not necessarily valid UTF8.
323 // For example, it may be created with arbitrary content via jni_NewStringUTF.
324 /*
325 {
326 ResourceMark rm;
327 const char* expected = utf8_str;
328 char* actual = as_utf8_string(h_obj());
329 if (strcmp(expected, actual) != 0) {
330 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
331 ShouldNotReachHere();
332 }
333 }
334 */
335 #endif
336
337 return h_obj;
338 }
339
340 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
341 Handle h_obj = create_from_str(utf8_str, CHECK_0);
342 return h_obj();
343 }
344
345 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
346 const char* utf8_str = (char*)symbol->bytes();
347 int utf8_len = symbol->utf8_length();
348
349 bool has_multibyte, is_latin1;
350 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
351 if (!CompactStrings) {
352 has_multibyte = true;
353 is_latin1 = false;
354 }
355
356 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
357 if (length > 0) {
358 if (!has_multibyte) {
359 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
360 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
361 } else if (is_latin1) {
362 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
363 } else {
364 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
365 }
366 }
367
368 #ifdef ASSERT
369 {
370 ResourceMark rm;
371 const char* expected = symbol->as_utf8();
372 char* actual = as_utf8_string(h_obj());
373 if (strncmp(expected, actual, utf8_len) != 0) {
374 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
375 ShouldNotReachHere();
376 }
377 }
378 #endif
379
380 return h_obj;
381 }
382
383 // Converts a C string to a Java String based on current encoding
384 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
385 assert(str != NULL, "bad arguments");
386
387 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
388 static to_java_string_fn_t _to_java_string_fn = NULL;
389
390 if (_to_java_string_fn == NULL) {
391 void *lib_handle = os::native_java_library();
392 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
393 if (_to_java_string_fn == NULL) {
394 fatal("NewStringPlatform missing");
395 }
396 }
397
398 jstring js = NULL;
399 { JavaThread* thread = (JavaThread*)THREAD;
400 assert(thread->is_Java_thread(), "must be java thread");
401 HandleMark hm(thread);
402 ThreadToNativeFromVM ttn(thread);
403 js = (_to_java_string_fn)(thread->jni_environment(), str);
404 }
405 return Handle(THREAD, JNIHandles::resolve(js));
406 }
407
408 // Converts a Java String to a native C string that can be used for
409 // native OS calls.
410 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
411 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
412 static to_platform_string_fn_t _to_platform_string_fn = NULL;
413
414 if (_to_platform_string_fn == NULL) {
415 void *lib_handle = os::native_java_library();
416 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
417 if (_to_platform_string_fn == NULL) {
418 fatal("GetStringPlatformChars missing");
419 }
420 }
421
422 char *native_platform_string;
423 { JavaThread* thread = (JavaThread*)THREAD;
424 assert(thread->is_Java_thread(), "must be java thread");
425 JNIEnv *env = thread->jni_environment();
426 jstring js = (jstring) JNIHandles::make_local(env, java_string());
427 bool is_copy;
428 HandleMark hm(thread);
429 ThreadToNativeFromVM ttn(thread);
430 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
431 assert(is_copy == JNI_TRUE, "is_copy value changed");
432 JNIHandles::destroy_local(js);
433 }
434 return native_platform_string;
435 }
436
437 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
438 oop obj = java_string();
439 // Typical usage is to convert all '/' to '.' in string.
440 typeArrayOop value = java_lang_String::value(obj);
441 int length = java_lang_String::length(obj);
442 bool is_latin1 = java_lang_String::is_latin1(obj);
443
444 // First check if any from_char exist
445 int index; // Declared outside, used later
446 for (index = 0; index < length; index++) {
447 jchar c = !is_latin1 ? value->char_at(index) :
448 ((jchar) value->byte_at(index)) & 0xff;
449 if (c == from_char) {
450 break;
451 }
452 }
453 if (index == length) {
454 // No from_char, so do not copy.
455 return java_string;
456 }
457
458 // Check if result string will be latin1
459 bool to_is_latin1 = false;
460
461 // Replacement char must be latin1
462 if (CompactStrings && UNICODE::is_latin1(to_char)) {
463 if (is_latin1) {
464 // Source string is latin1 as well
465 to_is_latin1 = true;
466 } else if (!UNICODE::is_latin1(from_char)) {
467 // We are replacing an UTF16 char. Scan string to
468 // check if result can be latin1 encoded.
469 to_is_latin1 = true;
470 for (index = 0; index < length; index++) {
471 jchar c = value->char_at(index);
472 if (c != from_char && !UNICODE::is_latin1(c)) {
473 to_is_latin1 = false;
474 break;
475 }
476 }
477 }
478 }
479
480 // Create new UNICODE (or byte) buffer. Must handlize value because GC
481 // may happen during String and char array creation.
482 typeArrayHandle h_value(THREAD, value);
483 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
484 typeArrayOop from_buffer = h_value();
485 typeArrayOop to_buffer = java_lang_String::value(string());
486
487 // Copy contents
488 for (index = 0; index < length; index++) {
489 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
490 ((jchar) from_buffer->byte_at(index)) & 0xff;
491 if (c == from_char) {
492 c = to_char;
493 }
494 if (!to_is_latin1) {
495 to_buffer->char_at_put(index, c);
496 } else {
497 to_buffer->byte_at_put(index, (jbyte) c);
498 }
499 }
500 return string;
501 }
502
503 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
504 typeArrayOop value = java_lang_String::value(java_string);
505 length = java_lang_String::length(java_string);
506 bool is_latin1 = java_lang_String::is_latin1(java_string);
507
508 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
509 if (result != NULL) {
510 if (!is_latin1) {
511 for (int index = 0; index < length; index++) {
512 result[index] = value->char_at(index);
513 }
514 } else {
515 for (int index = 0; index < length; index++) {
516 result[index] = ((jchar) value->byte_at(index)) & 0xff;
517 }
518 }
519 } else {
520 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
521 }
522 return result;
523 }
524
525 unsigned int java_lang_String::hash_code(oop java_string) {
526 int length = java_lang_String::length(java_string);
527 // Zero length string will hash to zero with String.hashCode() function.
528 if (length == 0) return 0;
529
530 typeArrayOop value = java_lang_String::value(java_string);
531 bool is_latin1 = java_lang_String::is_latin1(java_string);
532
533 if (is_latin1) {
534 return java_lang_String::hash_code(value->byte_at_addr(0), length);
535 } else {
536 return java_lang_String::hash_code(value->char_at_addr(0), length);
537 }
538 }
539
540 char* java_lang_String::as_quoted_ascii(oop java_string) {
541 typeArrayOop value = java_lang_String::value(java_string);
542 int length = java_lang_String::length(java_string);
543 bool is_latin1 = java_lang_String::is_latin1(java_string);
544
545 if (length == 0) return NULL;
546
547 char* result;
548 int result_length;
549 if (!is_latin1) {
550 jchar* base = value->char_at_addr(0);
551 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
552 result = NEW_RESOURCE_ARRAY(char, result_length);
553 UNICODE::as_quoted_ascii(base, length, result, result_length);
554 } else {
555 jbyte* base = value->byte_at_addr(0);
556 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
557 result = NEW_RESOURCE_ARRAY(char, result_length);
558 UNICODE::as_quoted_ascii(base, length, result, result_length);
559 }
560 assert(result_length >= length + 1, "must not be shorter");
561 assert(result_length == (int)strlen(result) + 1, "must match");
562 return result;
563 }
564
565 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
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 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
572 return sym;
573 } else {
574 ResourceMark rm;
575 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
576 const char* base = UNICODE::as_utf8(position, length);
577 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
578 return sym;
579 }
580 }
581
582 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
583 typeArrayOop value = java_lang_String::value(java_string);
584 int length = java_lang_String::length(java_string);
585 bool is_latin1 = java_lang_String::is_latin1(java_string);
586 if (!is_latin1) {
587 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
588 return SymbolTable::probe_unicode(base, length);
589 } else {
590 ResourceMark rm;
591 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
592 const char* base = UNICODE::as_utf8(position, length);
593 return SymbolTable::probe(base, length);
594 }
595 }
596
597 int java_lang_String::utf8_length(oop java_string) {
598 typeArrayOop value = java_lang_String::value(java_string);
599 int length = java_lang_String::length(java_string);
600 bool is_latin1 = java_lang_String::is_latin1(java_string);
601 if (length == 0) {
602 return 0;
603 }
604 if (!is_latin1) {
605 return UNICODE::utf8_length(value->char_at_addr(0), length);
606 } else {
607 return UNICODE::utf8_length(value->byte_at_addr(0), length);
608 }
609 }
610
611 char* java_lang_String::as_utf8_string(oop java_string) {
612 typeArrayOop value = java_lang_String::value(java_string);
613 int length = java_lang_String::length(java_string);
614 bool is_latin1 = java_lang_String::is_latin1(java_string);
615 if (!is_latin1) {
616 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
617 return UNICODE::as_utf8(position, length);
618 } else {
619 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
620 return UNICODE::as_utf8(position, length);
621 }
622 }
623
624 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
625 typeArrayOop value = java_lang_String::value(java_string);
626 int length = java_lang_String::length(java_string);
627 bool is_latin1 = java_lang_String::is_latin1(java_string);
628 if (!is_latin1) {
629 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
630 return UNICODE::as_utf8(position, length, buf, buflen);
631 } else {
632 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
633 return UNICODE::as_utf8(position, length, buf, buflen);
634 }
635 }
636
637 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
638 typeArrayOop value = java_lang_String::value(java_string);
639 int length = java_lang_String::length(java_string);
640 assert(start + len <= length, "just checking");
641 bool is_latin1 = java_lang_String::is_latin1(java_string);
642 if (!is_latin1) {
643 jchar* position = value->char_at_addr(start);
644 return UNICODE::as_utf8(position, len);
645 } else {
646 jbyte* position = value->byte_at_addr(start);
647 return UNICODE::as_utf8(position, len);
648 }
649 }
650
651 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
652 typeArrayOop value = java_lang_String::value(java_string);
653 int length = java_lang_String::length(java_string);
654 assert(start + len <= length, "just checking");
655 bool is_latin1 = java_lang_String::is_latin1(java_string);
656 if (!is_latin1) {
657 jchar* position = value->char_at_addr(start);
658 return UNICODE::as_utf8(position, len, buf, buflen);
659 } else {
660 jbyte* position = value->byte_at_addr(start);
661 return UNICODE::as_utf8(position, len, buf, buflen);
662 }
663 }
664
665 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
666 assert(java_string->klass() == SystemDictionary::String_klass(),
667 "must be java_string");
668 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
669 int length = java_lang_String::length(java_string);
670 if (length != len) {
671 return false;
672 }
673 bool is_latin1 = java_lang_String::is_latin1(java_string);
674 if (!is_latin1) {
675 for (int i = 0; i < len; i++) {
676 if (value->char_at(i) != chars[i]) {
677 return false;
678 }
679 }
680 } else {
681 for (int i = 0; i < len; i++) {
682 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
683 return false;
684 }
685 }
686 }
687 return true;
688 }
689
690 bool java_lang_String::equals(oop str1, oop str2) {
691 assert(str1->klass() == SystemDictionary::String_klass(),
692 "must be java String");
693 assert(str2->klass() == SystemDictionary::String_klass(),
694 "must be java String");
695 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
696 int length1 = java_lang_String::length(str1);
697 bool is_latin1 = java_lang_String::is_latin1(str1);
698 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
699 int length2 = java_lang_String::length(str2);
700 bool is_latin2 = java_lang_String::is_latin1(str2);
701
702 if ((length1 != length2) || (is_latin1 != is_latin2)) {
703 // Strings of different size or with different
704 // coders are never equal.
705 return false;
706 }
707 int blength1 = value1->length();
708 for (int i = 0; i < blength1; i++) {
709 if (value1->byte_at(i) != value2->byte_at(i)) {
710 return false;
711 }
712 }
713 return true;
714 }
715
716 void java_lang_String::print(oop java_string, outputStream* st) {
717 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
718 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
719
720 if (value == NULL) {
721 // This can happen if, e.g., printing a String
722 // object before its initializer has been called
723 st->print("NULL");
724 return;
725 }
726
727 int length = java_lang_String::length(java_string);
728 bool is_latin1 = java_lang_String::is_latin1(java_string);
729
730 st->print("\"");
731 for (int index = 0; index < length; index++) {
732 st->print("%c", (!is_latin1) ? value->char_at(index) :
733 ((jchar) value->byte_at(index)) & 0xff );
734 }
735 st->print("\"");
736 }
737
738
739 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
740 assert(mirror.not_null() && fd->is_static(), "just checking");
741 if (fd->has_initial_value()) {
742 BasicType t = fd->field_type();
743 switch (t) {
744 case T_BYTE:
745 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
746 break;
747 case T_BOOLEAN:
748 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
749 break;
750 case T_CHAR:
751 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
752 break;
753 case T_SHORT:
754 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
755 break;
756 case T_INT:
757 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
758 break;
759 case T_FLOAT:
760 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
761 break;
762 case T_DOUBLE:
763 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
764 break;
765 case T_LONG:
766 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
767 break;
768 case T_OBJECT:
769 {
770 assert(fd->signature() == vmSymbols::string_signature(),
771 "just checking");
772 if (DumpSharedSpaces && MetaspaceShared::is_archive_object(mirror())) {
773 // Archive the String field and update the pointer.
774 oop s = mirror()->obj_field(fd->offset());
775 oop archived_s = StringTable::create_archived_string(s, CHECK);
776 mirror()->obj_field_put(fd->offset(), archived_s);
777 } else {
778 oop string = fd->string_initial_value(CHECK);
779 mirror()->obj_field_put(fd->offset(), string);
780 }
781 }
782 break;
783 default:
784 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
785 "Illegal ConstantValue attribute in class file");
786 }
787 }
788 }
789
790
791 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
792 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
793
794 // If the offset was read from the shared archive, it was fixed up already
795 if (!k->is_shared()) {
796 if (k->is_instance_klass()) {
797 // During bootstrap, java.lang.Class wasn't loaded so static field
798 // offsets were computed without the size added it. Go back and
799 // update all the static field offsets to included the size.
800 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
801 if (fs.access_flags().is_static()) {
802 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
803 fs.set_offset(real_offset);
804 }
805 }
806 }
807 }
808
809 if (k->is_shared() && k->has_raw_archived_mirror()) {
810 if (MetaspaceShared::open_archive_heap_region_mapped()) {
811 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
812 assert(present, "Missing archived mirror for %s", k->external_name());
813 return;
814 } else {
815 k->set_java_mirror_handle(NULL);
816 k->clear_has_raw_archived_mirror();
817 }
818 }
819 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
820 }
821
822 void java_lang_Class::initialize_mirror_fields(Klass* k,
823 Handle mirror,
824 Handle protection_domain,
825 TRAPS) {
826 // Allocate a simple java object for a lock.
827 // This needs to be a java object because during class initialization
828 // it can be held across a java call.
829 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
830 set_init_lock(mirror(), r);
831
832 // Set protection domain also
833 set_protection_domain(mirror(), protection_domain());
834
835 // Initialize static fields
836 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
837 }
838
839 // Set the java.lang.Module module field in the java_lang_Class mirror
840 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
841 if (module.is_null()) {
842 // During startup, the module may be NULL only if java.base has not been defined yet.
843 // Put the class on the fixup_module_list to patch later when the java.lang.Module
844 // for java.base is known.
845 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization");
846
847 bool javabase_was_defined = false;
848 {
849 MutexLocker m1(Module_lock, THREAD);
850 // Keep list of classes needing java.base module fixup
851 if (!ModuleEntryTable::javabase_defined()) {
852 assert(k->java_mirror() != NULL, "Class's mirror is null");
853 k->class_loader_data()->inc_keep_alive();
854 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
855 fixup_module_field_list()->push(k);
856 } else {
857 javabase_was_defined = true;
858 }
859 }
860
861 // If java.base was already defined then patch this particular class with java.base.
862 if (javabase_was_defined) {
863 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
864 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
865 "Setting class module field, " JAVA_BASE_NAME " should be defined");
866 Handle javabase_handle(THREAD, javabase_entry->module());
867 set_module(mirror(), javabase_handle());
868 }
869 } else {
870 assert(Universe::is_module_initialized() ||
871 (ModuleEntryTable::javabase_defined() &&
872 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
873 "Incorrect java.lang.Module specification while creating mirror");
874 set_module(mirror(), module());
875 }
876 }
877
878 // Statically allocate fixup lists because they always get created.
879 void java_lang_Class::allocate_fixup_lists() {
880 GrowableArray<Klass*>* mirror_list =
881 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
882 set_fixup_mirror_list(mirror_list);
883
884 GrowableArray<Klass*>* module_list =
885 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
886 set_fixup_module_field_list(module_list);
887 }
888
889 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
890 Handle module, Handle protection_domain, TRAPS) {
891 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
892 assert(k->java_mirror() == NULL, "should only assign mirror once");
893
894 // Use this moment of initialization to cache modifier_flags also,
895 // to support Class.getModifiers(). Instance classes recalculate
896 // the cached flags after the class file is parsed, but before the
897 // class is put into the system dictionary.
898 int computed_modifiers = k->compute_modifier_flags(CHECK);
899 k->set_modifier_flags(computed_modifiers);
900 // Class_klass has to be loaded because it is used to allocate
901 // the mirror.
902 if (SystemDictionary::Class_klass_loaded()) {
903 // Allocate mirror (java.lang.Class instance)
904 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
905 Handle mirror(THREAD, mirror_oop);
906 Handle comp_mirror;
907
908 // Setup indirection from mirror->klass
909 java_lang_Class::set_klass(mirror(), k);
910
911 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
912 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
913
914 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
915
916 // It might also have a component mirror. This mirror must already exist.
917 if (k->is_array_klass()) {
918 if (k->is_typeArray_klass()) {
919 BasicType type = TypeArrayKlass::cast(k)->element_type();
920 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
921 } else {
922 assert(k->is_objArray_klass(), "Must be");
923 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
924 assert(element_klass != NULL, "Must have an element klass");
925 comp_mirror = Handle(THREAD, element_klass->java_mirror());
926 }
927 assert(comp_mirror() != NULL, "must have a mirror");
928
929 // Two-way link between the array klass and its component mirror:
930 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
931 set_component_mirror(mirror(), comp_mirror());
932 // See below for ordering dependencies between field array_klass in component mirror
933 // and java_mirror in this klass.
934 } else {
935 assert(k->is_instance_klass(), "Must be");
936
937 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
938 if (HAS_PENDING_EXCEPTION) {
939 // If any of the fields throws an exception like OOM remove the klass field
940 // from the mirror so GC doesn't follow it after the klass has been deallocated.
941 // This mirror looks like a primitive type, which logically it is because it
942 // it represents no class.
943 java_lang_Class::set_klass(mirror(), NULL);
944 return;
945 }
946 }
947
948 // set the classLoader field in the java_lang_Class instance
949 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
950 set_class_loader(mirror(), class_loader());
951
952 // Setup indirection from klass->mirror
953 // after any exceptions can happen during allocations.
954 k->set_java_mirror(mirror);
955
956 // Set the module field in the java_lang_Class instance. This must be done
957 // after the mirror is set.
958 set_mirror_module_field(k, mirror, module, THREAD);
959
960 if (comp_mirror() != NULL) {
961 // Set after k->java_mirror() is published, because compiled code running
962 // concurrently doesn't expect a k to have a null java_mirror.
963 release_set_array_klass(comp_mirror(), k);
964 }
965 } else {
966 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
967 fixup_mirror_list()->push(k);
968 }
969 }
970
971 #if INCLUDE_CDS_JAVA_HEAP
972 // Clears mirror fields. Static final fields with initial values are reloaded
973 // from constant pool. The object identity hash is in the object header and is
974 // not affected.
975 class ResetMirrorField: public FieldClosure {
976 private:
977 Handle _m;
978
979 public:
980 ResetMirrorField(Handle mirror) : _m(mirror) {}
981
982 void do_field(fieldDescriptor* fd) {
983 assert(DumpSharedSpaces, "dump time only");
984 assert(_m.not_null(), "Mirror cannot be NULL");
985
986 if (fd->is_static() && fd->has_initial_value()) {
987 initialize_static_field(fd, _m, Thread::current());
988 return;
989 }
990
991 BasicType ft = fd->field_type();
992 switch (ft) {
993 case T_BYTE:
994 _m()->byte_field_put(fd->offset(), 0);
995 break;
996 case T_CHAR:
997 _m()->char_field_put(fd->offset(), 0);
998 break;
999 case T_DOUBLE:
1000 _m()->double_field_put(fd->offset(), 0);
1001 break;
1002 case T_FLOAT:
1003 _m()->float_field_put(fd->offset(), 0);
1004 break;
1005 case T_INT:
1006 _m()->int_field_put(fd->offset(), 0);
1007 break;
1008 case T_LONG:
1009 _m()->long_field_put(fd->offset(), 0);
1010 break;
1011 case T_SHORT:
1012 _m()->short_field_put(fd->offset(), 0);
1013 break;
1014 case T_BOOLEAN:
1015 _m()->bool_field_put(fd->offset(), false);
1016 break;
1017 case T_ARRAY:
1018 case T_OBJECT: {
1019 // It might be useful to cache the String field, but
1020 // for now just clear out any reference field
1021 oop o = _m()->obj_field(fd->offset());
1022 _m()->obj_field_put(fd->offset(), NULL);
1023 break;
1024 }
1025 default:
1026 ShouldNotReachHere();
1027 break;
1028 }
1029 }
1030 };
1031
1032 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1033 assert(MetaspaceShared::is_heap_object_archiving_allowed(),
1034 "MetaspaceShared::is_heap_object_archiving_allowed() must be true");
1035
1036 for (int t = 0; t <= T_VOID; t++) {
1037 oop m = Universe::_mirrors[t];
1038 if (m != NULL) {
1039 // Update the field at _array_klass_offset to point to the relocated array klass.
1040 oop archived_m = MetaspaceShared::archive_heap_object(m, THREAD);
1041 assert(archived_m != NULL, "sanity");
1042 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1043 assert(ak != NULL || t == T_VOID, "should not be NULL");
1044 if (ak != NULL) {
1045 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1046 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1047 }
1048
1049 // Clear the fields. Just to be safe
1050 Klass *k = m->klass();
1051 Handle archived_mirror_h(THREAD, archived_m);
1052 ResetMirrorField reset(archived_mirror_h);
1053 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1054
1055 log_trace(cds, heap, mirror)(
1056 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1057 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1058
1059 Universe::_mirrors[t] = archived_m;
1060 }
1061 }
1062
1063 assert(Universe::_mirrors[T_INT] != NULL &&
1064 Universe::_mirrors[T_FLOAT] != NULL &&
1065 Universe::_mirrors[T_DOUBLE] != NULL &&
1066 Universe::_mirrors[T_BYTE] != NULL &&
1067 Universe::_mirrors[T_BOOLEAN] != NULL &&
1068 Universe::_mirrors[T_CHAR] != NULL &&
1069 Universe::_mirrors[T_LONG] != NULL &&
1070 Universe::_mirrors[T_SHORT] != NULL &&
1071 Universe::_mirrors[T_VOID] != NULL, "sanity");
1072
1073 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1074 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1075 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1076 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1077 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1078 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1079 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1080 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1081 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1082 }
1083
1084 //
1085 // After the mirror object is successfully archived, the archived
1086 // klass is set with _has_archived_raw_mirror flag.
1087 //
1088 // The _has_archived_raw_mirror flag is cleared at runtime when the
1089 // archived mirror is restored. If archived java heap data cannot
1090 // be used at runtime, new mirror object is created for the shared
1091 // class. The _has_archived_raw_mirror is cleared also during the process.
1092 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1093 assert(MetaspaceShared::is_heap_object_archiving_allowed(),
1094 "MetaspaceShared::is_heap_object_archiving_allowed() must be true");
1095
1096 // Mirror is already archived
1097 if (k->has_raw_archived_mirror()) {
1098 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1099 return k->archived_java_mirror_raw();
1100 }
1101
1102 // No mirror
1103 oop mirror = k->java_mirror();
1104 if (mirror == NULL) {
1105 return NULL;
1106 }
1107
1108 if (k->is_instance_klass()) {
1109 InstanceKlass *ik = InstanceKlass::cast(k);
1110 assert(ik->signers() == NULL && !k->has_signer_and_not_archived(),
1111 "class with signer cannot be supported");
1112
1113 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1114 ik->is_shared_app_class())) {
1115 // Archiving mirror for classes from non-builtin loaders is not
1116 // supported. Clear the _java_mirror within the archived class.
1117 k->set_java_mirror_handle(NULL);
1118 return NULL;
1119 }
1120 }
1121
1122 // Now start archiving the mirror object
1123 oop archived_mirror = MetaspaceShared::archive_heap_object(mirror, THREAD);
1124 if (archived_mirror == NULL) {
1125 return NULL;
1126 }
1127
1128 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1129 if (archived_mirror == NULL) {
1130 return NULL;
1131 }
1132
1133 k->set_archived_java_mirror_raw(archived_mirror);
1134
1135 k->set_has_raw_archived_mirror();
1136
1137 ResourceMark rm;
1138 log_trace(cds, heap, mirror)(
1139 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1140 k->external_name(), p2i(mirror), p2i(archived_mirror));
1141
1142 return archived_mirror;
1143 }
1144
1145 // The process is based on create_mirror().
1146 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1147 oop archived_mirror,
1148 Thread *THREAD) {
1149 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1150 // to archived metadata and objects below.
1151 Klass *c = archived_mirror->klass();
1152 Handle archived_mirror_h(THREAD, archived_mirror);
1153 ResetMirrorField reset(archived_mirror_h);
1154 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1155
1156 if (k->is_array_klass()) {
1157 oop archived_comp_mirror;
1158 if (k->is_typeArray_klass()) {
1159 // The primitive type mirrors are already archived. Get the archived mirror.
1160 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1161 archived_comp_mirror = MetaspaceShared::find_archived_heap_object(comp_mirror);
1162 assert(archived_comp_mirror != NULL, "Must be");
1163 } else {
1164 assert(k->is_objArray_klass(), "Must be");
1165 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1166 assert(element_klass != NULL, "Must have an element klass");
1167 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1168 if (archived_comp_mirror == NULL) {
1169 return NULL;
1170 }
1171 }
1172 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1173 } else {
1174 assert(k->is_instance_klass(), "Must be");
1175
1176 // Reset local static fields in the mirror
1177 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1178
1179 java_lang_Class:set_init_lock(archived_mirror, NULL);
1180
1181 set_protection_domain(archived_mirror, NULL);
1182 }
1183
1184 // clear class loader and mirror_module_field
1185 set_class_loader(archived_mirror, NULL);
1186 set_module(archived_mirror, NULL);
1187
1188 // The archived mirror's field at _klass_offset is still pointing to the original
1189 // klass. Updated the field in the archived mirror to point to the relocated
1190 // klass in the archive.
1191 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1192 log_debug(cds, heap, mirror)(
1193 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1194 p2i(as_Klass(mirror)), p2i(reloc_k));
1195 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1196
1197 // The field at _array_klass_offset is pointing to the original one dimension
1198 // higher array klass if exists. Relocate the pointer.
1199 Klass *arr = array_klass_acquire(mirror);
1200 if (arr != NULL) {
1201 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1202 log_debug(cds, heap, mirror)(
1203 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1204 p2i(arr), p2i(reloc_arr));
1205 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1206 }
1207 return archived_mirror;
1208 }
1209
1210 // Returns true if the mirror is updated, false if no archived mirror
1211 // data is present. After the archived mirror object is restored, the
1212 // shared klass' _has_raw_archived_mirror flag is cleared.
1213 bool java_lang_Class::restore_archived_mirror(Klass *k,
1214 Handle class_loader, Handle module,
1215 Handle protection_domain, TRAPS) {
1216 oop m = MetaspaceShared::materialize_archived_object(k->archived_java_mirror_raw());
1217
1218 if (m == NULL) {
1219 return false;
1220 }
1221
1222 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1223
1224 // mirror is archived, restore
1225 assert(MetaspaceShared::is_archive_object(m), "must be archived mirror object");
1226 Handle mirror(THREAD, m);
1227
1228 // The java.lang.Class field offsets were archived and reloaded from archive.
1229 // No need to put classes on the fixup_mirror_list before java.lang.Class
1230 // is loaded.
1231
1232 if (!k->is_array_klass()) {
1233 // - local static final fields with initial values were initialized at dump time
1234
1235 // create the init_lock
1236 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1237 set_init_lock(mirror(), r);
1238
1239 if (protection_domain.not_null()) {
1240 set_protection_domain(mirror(), protection_domain());
1241 }
1242 }
1243
1244 assert(class_loader() == k->class_loader(), "should be same");
1245 if (class_loader.not_null()) {
1246 set_class_loader(mirror(), class_loader());
1247 }
1248
1249 k->set_java_mirror(mirror);
1250 k->clear_has_raw_archived_mirror();
1251
1252 set_mirror_module_field(k, mirror, module, THREAD);
1253
1254 ResourceMark rm;
1255 log_trace(cds, heap, mirror)(
1256 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1257
1258 return true;
1259 }
1260 #endif // INCLUDE_CDS_JAVA_HEAP
1261
1262 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1263 assert(_module_offset != 0, "must have been computed already");
1264 java_lang_Class::set_module(k->java_mirror(), module());
1265 }
1266
1267 int java_lang_Class::oop_size(oop java_class) {
1268 assert(_oop_size_offset != 0, "must be set");
1269 int size = java_class->int_field(_oop_size_offset);
1270 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1271 return size;
1272 }
1273
1274 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1275 assert(_oop_size_offset != 0, "must be set");
1276 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1277 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1278 }
1279
1280 int java_lang_Class::static_oop_field_count(oop java_class) {
1281 assert(_static_oop_field_count_offset != 0, "must be set");
1282 return java_class->int_field(_static_oop_field_count_offset);
1283 }
1284 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1285 assert(_static_oop_field_count_offset != 0, "must be set");
1286 java_class->int_field_put(_static_oop_field_count_offset, size);
1287 }
1288
1289 oop java_lang_Class::protection_domain(oop java_class) {
1290 assert(_protection_domain_offset != 0, "must be set");
1291 return java_class->obj_field(_protection_domain_offset);
1292 }
1293 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1294 assert(_protection_domain_offset != 0, "must be set");
1295 java_class->obj_field_put(_protection_domain_offset, pd);
1296 }
1297
1298 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1299 assert(_component_mirror_offset != 0, "must be set");
1300 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1301 }
1302 oop java_lang_Class::component_mirror(oop java_class) {
1303 assert(_component_mirror_offset != 0, "must be set");
1304 return java_class->obj_field(_component_mirror_offset);
1305 }
1306
1307 oop java_lang_Class::init_lock(oop java_class) {
1308 assert(_init_lock_offset != 0, "must be set");
1309 return java_class->obj_field(_init_lock_offset);
1310 }
1311 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1312 assert(_init_lock_offset != 0, "must be set");
1313 java_class->obj_field_put(_init_lock_offset, init_lock);
1314 }
1315
1316 objArrayOop java_lang_Class::signers(oop java_class) {
1317 assert(_signers_offset != 0, "must be set");
1318 return (objArrayOop)java_class->obj_field(_signers_offset);
1319 }
1320 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1321 assert(_signers_offset != 0, "must be set");
1322 java_class->obj_field_put(_signers_offset, (oop)signers);
1323 }
1324
1325
1326 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1327 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1328 if (_class_loader_offset != 0) {
1329 java_class->obj_field_put(_class_loader_offset, loader);
1330 }
1331 }
1332
1333 oop java_lang_Class::class_loader(oop java_class) {
1334 assert(_class_loader_offset != 0, "must be set");
1335 return java_class->obj_field(_class_loader_offset);
1336 }
1337
1338 oop java_lang_Class::module(oop java_class) {
1339 assert(_module_offset != 0, "must be set");
1340 return java_class->obj_field(_module_offset);
1341 }
1342
1343 void java_lang_Class::set_module(oop java_class, oop module) {
1344 assert(_module_offset != 0, "must be set");
1345 java_class->obj_field_put(_module_offset, module);
1346 }
1347
1348 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1349 // This should be improved by adding a field at the Java level or by
1350 // introducing a new VM klass (see comment in ClassFileParser)
1351 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1352 if (type != T_VOID) {
1353 Klass* aklass = Universe::typeArrayKlassObj(type);
1354 assert(aklass != NULL, "correct bootstrap");
1355 release_set_array_klass(java_class, aklass);
1356 }
1357 #ifdef ASSERT
1358 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1359 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1360 #endif
1361 return java_class;
1362 }
1363
1364
1365 Klass* java_lang_Class::as_Klass(oop java_class) {
1366 //%note memory_2
1367 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1368 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1369 assert(k == NULL || k->is_klass(), "type check");
1370 return k;
1371 }
1372
1373
1374 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1375 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1376 java_class->metadata_field_put(_klass_offset, klass);
1377 }
1378
1379
1380 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1381 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1382 Symbol* name = NULL;
1383 bool is_instance = false;
1384 if (is_primitive(java_class)) {
1385 name = vmSymbols::type_signature(primitive_type(java_class));
1386 } else {
1387 Klass* k = as_Klass(java_class);
1388 is_instance = k->is_instance_klass();
1389 name = k->name();
1390 }
1391 if (name == NULL) {
1392 st->print("<null>");
1393 return;
1394 }
1395 if (is_instance) st->print("L");
1396 st->write((char*) name->base(), (int) name->utf8_length());
1397 if (is_instance) st->print(";");
1398 }
1399
1400 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1401 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1402 Symbol* name;
1403 if (is_primitive(java_class)) {
1404 name = vmSymbols::type_signature(primitive_type(java_class));
1405 // Because this can create a new symbol, the caller has to decrement
1406 // the refcount, so make adjustment here and below for symbols returned
1407 // that are not created or incremented due to a successful lookup.
1408 name->increment_refcount();
1409 } else {
1410 Klass* k = as_Klass(java_class);
1411 if (!k->is_instance_klass()) {
1412 name = k->name();
1413 name->increment_refcount();
1414 } else {
1415 ResourceMark rm;
1416 const char* sigstr = k->signature_name();
1417 int siglen = (int) strlen(sigstr);
1418 if (!intern_if_not_found) {
1419 name = SymbolTable::probe(sigstr, siglen);
1420 } else {
1421 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1422 }
1423 }
1424 }
1425 return name;
1426 }
1427
1428 // Returns the Java name for this Java mirror (Resource allocated)
1429 // See Klass::external_name().
1430 // For primitive type Java mirrors, its type name is returned.
1431 const char* java_lang_Class::as_external_name(oop java_class) {
1432 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1433 const char* name = NULL;
1434 if (is_primitive(java_class)) {
1435 name = type2name(primitive_type(java_class));
1436 } else {
1437 name = as_Klass(java_class)->external_name();
1438 }
1439 if (name == NULL) {
1440 name = "<null>";
1441 }
1442 return name;
1443 }
1444
1445 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1446 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1447 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1448 return k;
1449 }
1450
1451
1452 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1453 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1454 java_class->release_metadata_field_put(_array_klass_offset, klass);
1455 }
1456
1457
1458 bool java_lang_Class::is_primitive(oop java_class) {
1459 // should assert:
1460 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1461 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1462
1463 #ifdef ASSERT
1464 if (is_primitive) {
1465 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1466 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1467 "Should be either the T_VOID primitive or a java primitive");
1468 }
1469 #endif
1470
1471 return is_primitive;
1472 }
1473
1474
1475 BasicType java_lang_Class::primitive_type(oop java_class) {
1476 assert(java_lang_Class::is_primitive(java_class), "just checking");
1477 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1478 BasicType type = T_VOID;
1479 if (ak != NULL) {
1480 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1481 type = ArrayKlass::cast(ak)->element_type();
1482 } else {
1483 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1484 }
1485 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1486 return type;
1487 }
1488
1489 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1490 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1491 if (is_primitive(java_class)) {
1492 if (reference_klass != NULL)
1493 (*reference_klass) = NULL;
1494 return primitive_type(java_class);
1495 } else {
1496 if (reference_klass != NULL)
1497 (*reference_klass) = as_Klass(java_class);
1498 return T_OBJECT;
1499 }
1500 }
1501
1502
1503 oop java_lang_Class::primitive_mirror(BasicType t) {
1504 oop mirror = Universe::java_mirror(t);
1505 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1506 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1507 return mirror;
1508 }
1509
1510 bool java_lang_Class::offsets_computed = false;
1511 int java_lang_Class::classRedefinedCount_offset = -1;
1512
1513 #define CLASS_FIELDS_DO(macro) \
1514 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1515 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1516 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1517 macro(_module_offset, k, "module", module_signature, false)
1518
1519 void java_lang_Class::compute_offsets() {
1520 if (offsets_computed) {
1521 return;
1522 }
1523
1524 offsets_computed = true;
1525
1526 InstanceKlass* k = SystemDictionary::Class_klass();
1527 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1528
1529 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1530 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1531 // GC treats them the same.
1532 _init_lock_offset = _component_mirror_offset;
1533
1534 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1535 }
1536
1537 #if INCLUDE_CDS
1538 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1539 f->do_u4((u4*)&offsets_computed);
1540 f->do_u4((u4*)&_init_lock_offset);
1541
1542 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1543
1544 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1545 }
1546 #endif
1547
1548 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1549 if (classRedefinedCount_offset == -1) {
1550 // If we don't have an offset for it then just return -1 as a marker.
1551 return -1;
1552 }
1553
1554 return the_class_mirror->int_field(classRedefinedCount_offset);
1555 }
1556
1557 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1558 if (classRedefinedCount_offset == -1) {
1559 // If we don't have an offset for it then nothing to set.
1560 return;
1561 }
1562
1563 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1564 }
1565
1566
1567 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1568 // platform thread structure, and a eetop offset which was used for thread
1569 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1570 // merged, so in the HotSpot VM we just use the eetop field for the thread
1571 // instead of the privateInfo_offset.
1572 //
1573 // Note: The stackSize field is only present starting in 1.4.
1574
1575 int java_lang_Thread::_name_offset = 0;
1576 int java_lang_Thread::_group_offset = 0;
1577 int java_lang_Thread::_contextClassLoader_offset = 0;
1578 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1579 int java_lang_Thread::_priority_offset = 0;
1580 int java_lang_Thread::_eetop_offset = 0;
1581 int java_lang_Thread::_daemon_offset = 0;
1582 int java_lang_Thread::_stillborn_offset = 0;
1583 int java_lang_Thread::_stackSize_offset = 0;
1584 int java_lang_Thread::_tid_offset = 0;
1585 int java_lang_Thread::_thread_status_offset = 0;
1586 int java_lang_Thread::_park_blocker_offset = 0;
1587 int java_lang_Thread::_park_event_offset = 0 ;
1588
1589 #define THREAD_FIELDS_DO(macro) \
1590 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1591 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1592 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1593 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1594 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1595 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1596 macro(_eetop_offset, k, "eetop", long_signature, false); \
1597 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1598 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1599 macro(_tid_offset, k, "tid", long_signature, false); \
1600 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1601 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1602 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1603
1604 void java_lang_Thread::compute_offsets() {
1605 assert(_group_offset == 0, "offsets should be initialized only once");
1606
1607 InstanceKlass* k = SystemDictionary::Thread_klass();
1608 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1609 }
1610
1611 #if INCLUDE_CDS
1612 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1613 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1614 }
1615 #endif
1616
1617 JavaThread* java_lang_Thread::thread(oop java_thread) {
1618 return (JavaThread*)java_thread->address_field(_eetop_offset);
1619 }
1620
1621
1622 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1623 java_thread->address_field_put(_eetop_offset, (address)thread);
1624 }
1625
1626
1627 oop java_lang_Thread::name(oop java_thread) {
1628 return java_thread->obj_field(_name_offset);
1629 }
1630
1631
1632 void java_lang_Thread::set_name(oop java_thread, oop name) {
1633 java_thread->obj_field_put(_name_offset, name);
1634 }
1635
1636
1637 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1638 return (ThreadPriority)java_thread->int_field(_priority_offset);
1639 }
1640
1641
1642 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1643 java_thread->int_field_put(_priority_offset, priority);
1644 }
1645
1646
1647 oop java_lang_Thread::threadGroup(oop java_thread) {
1648 return java_thread->obj_field(_group_offset);
1649 }
1650
1651
1652 bool java_lang_Thread::is_stillborn(oop java_thread) {
1653 return java_thread->bool_field(_stillborn_offset) != 0;
1654 }
1655
1656
1657 // We never have reason to turn the stillborn bit off
1658 void java_lang_Thread::set_stillborn(oop java_thread) {
1659 java_thread->bool_field_put(_stillborn_offset, true);
1660 }
1661
1662
1663 bool java_lang_Thread::is_alive(oop java_thread) {
1664 JavaThread* thr = java_lang_Thread::thread(java_thread);
1665 return (thr != NULL);
1666 }
1667
1668
1669 bool java_lang_Thread::is_daemon(oop java_thread) {
1670 return java_thread->bool_field(_daemon_offset) != 0;
1671 }
1672
1673
1674 void java_lang_Thread::set_daemon(oop java_thread) {
1675 java_thread->bool_field_put(_daemon_offset, true);
1676 }
1677
1678 oop java_lang_Thread::context_class_loader(oop java_thread) {
1679 return java_thread->obj_field(_contextClassLoader_offset);
1680 }
1681
1682 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1683 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1684 }
1685
1686
1687 jlong java_lang_Thread::stackSize(oop java_thread) {
1688 if (_stackSize_offset > 0) {
1689 return java_thread->long_field(_stackSize_offset);
1690 } else {
1691 return 0;
1692 }
1693 }
1694
1695 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1696 void java_lang_Thread::set_thread_status(oop java_thread,
1697 java_lang_Thread::ThreadStatus status) {
1698 // The threadStatus is only present starting in 1.5
1699 if (_thread_status_offset > 0) {
1700 java_thread->int_field_put(_thread_status_offset, status);
1701 }
1702 }
1703
1704 // Read thread status value from threadStatus field in java.lang.Thread java class.
1705 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1706 // Make sure the caller is operating on behalf of the VM or is
1707 // running VM code (state == _thread_in_vm).
1708 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1709 JavaThread::current()->thread_state() == _thread_in_vm,
1710 "Java Thread is not running in vm");
1711 // The threadStatus is only present starting in 1.5
1712 if (_thread_status_offset > 0) {
1713 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1714 } else {
1715 // All we can easily figure out is if it is alive, but that is
1716 // enough info for a valid unknown status.
1717 // These aren't restricted to valid set ThreadStatus values, so
1718 // use JVMTI values and cast.
1719 JavaThread* thr = java_lang_Thread::thread(java_thread);
1720 if (thr == NULL) {
1721 // the thread hasn't run yet or is in the process of exiting
1722 return NEW;
1723 }
1724 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1725 }
1726 }
1727
1728
1729 jlong java_lang_Thread::thread_id(oop java_thread) {
1730 // The thread ID field is only present starting in 1.5
1731 if (_tid_offset > 0) {
1732 return java_thread->long_field(_tid_offset);
1733 } else {
1734 return 0;
1735 }
1736 }
1737
1738 oop java_lang_Thread::park_blocker(oop java_thread) {
1739 assert(JDK_Version::current().supports_thread_park_blocker() &&
1740 _park_blocker_offset != 0, "Must support parkBlocker field");
1741
1742 if (_park_blocker_offset > 0) {
1743 return java_thread->obj_field(_park_blocker_offset);
1744 }
1745
1746 return NULL;
1747 }
1748
1749 jlong java_lang_Thread::park_event(oop java_thread) {
1750 if (_park_event_offset > 0) {
1751 return java_thread->long_field(_park_event_offset);
1752 }
1753 return 0;
1754 }
1755
1756 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1757 if (_park_event_offset > 0) {
1758 java_thread->long_field_put(_park_event_offset, ptr);
1759 return true;
1760 }
1761 return false;
1762 }
1763
1764
1765 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1766 assert(_thread_status_offset != 0, "Must have thread status");
1767 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1768 switch (status) {
1769 case NEW : return "NEW";
1770 case RUNNABLE : return "RUNNABLE";
1771 case SLEEPING : return "TIMED_WAITING (sleeping)";
1772 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1773 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1774 case PARKED : return "WAITING (parking)";
1775 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1776 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1777 case TERMINATED : return "TERMINATED";
1778 default : return "UNKNOWN";
1779 };
1780 }
1781 int java_lang_ThreadGroup::_parent_offset = 0;
1782 int java_lang_ThreadGroup::_name_offset = 0;
1783 int java_lang_ThreadGroup::_threads_offset = 0;
1784 int java_lang_ThreadGroup::_groups_offset = 0;
1785 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1786 int java_lang_ThreadGroup::_destroyed_offset = 0;
1787 int java_lang_ThreadGroup::_daemon_offset = 0;
1788 int java_lang_ThreadGroup::_nthreads_offset = 0;
1789 int java_lang_ThreadGroup::_ngroups_offset = 0;
1790
1791 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1792 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1793 return java_thread_group->obj_field(_parent_offset);
1794 }
1795
1796 // ("name as oop" accessor is not necessary)
1797
1798 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1799 oop name = java_thread_group->obj_field(_name_offset);
1800 // ThreadGroup.name can be null
1801 if (name != NULL) {
1802 return java_lang_String::as_utf8_string(name);
1803 }
1804 return NULL;
1805 }
1806
1807 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1808 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1809 return java_thread_group->int_field(_nthreads_offset);
1810 }
1811
1812 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1813 oop threads = java_thread_group->obj_field(_threads_offset);
1814 assert(threads != NULL, "threadgroups should have threads");
1815 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1816 return objArrayOop(threads);
1817 }
1818
1819 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1820 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1821 return java_thread_group->int_field(_ngroups_offset);
1822 }
1823
1824 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1825 oop groups = java_thread_group->obj_field(_groups_offset);
1826 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1827 return objArrayOop(groups);
1828 }
1829
1830 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1831 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1832 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1833 }
1834
1835 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1836 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1837 return java_thread_group->bool_field(_destroyed_offset) != 0;
1838 }
1839
1840 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1841 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1842 return java_thread_group->bool_field(_daemon_offset) != 0;
1843 }
1844
1845 #define THREADGROUP_FIELDS_DO(macro) \
1846 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1847 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1848 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1849 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1850 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1851 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1852 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1853 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1854 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1855
1856 void java_lang_ThreadGroup::compute_offsets() {
1857 assert(_parent_offset == 0, "offsets should be initialized only once");
1858
1859 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1860 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1861 }
1862
1863 #if INCLUDE_CDS
1864 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1865 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1866 }
1867 #endif
1868
1869 #define THROWABLE_FIELDS_DO(macro) \
1870 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1871 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1872 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1873 macro(depth_offset, k, "depth", int_signature, false); \
1874 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1875
1876 void java_lang_Throwable::compute_offsets() {
1877 InstanceKlass* k = SystemDictionary::Throwable_klass();
1878 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1879 }
1880
1881 #if INCLUDE_CDS
1882 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1883 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1884 }
1885 #endif
1886
1887 oop java_lang_Throwable::unassigned_stacktrace() {
1888 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1889 oop base = ik->static_field_base_raw();
1890 return base->obj_field(static_unassigned_stacktrace_offset);
1891 }
1892
1893 oop java_lang_Throwable::backtrace(oop throwable) {
1894 return throwable->obj_field_acquire(backtrace_offset);
1895 }
1896
1897
1898 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1899 throwable->release_obj_field_put(backtrace_offset, value);
1900 }
1901
1902 int java_lang_Throwable::depth(oop throwable) {
1903 return throwable->int_field(depth_offset);
1904 }
1905
1906 void java_lang_Throwable::set_depth(oop throwable, int value) {
1907 throwable->int_field_put(depth_offset, value);
1908 }
1909
1910 oop java_lang_Throwable::message(oop throwable) {
1911 return throwable->obj_field(detailMessage_offset);
1912 }
1913
1914
1915 // Return Symbol for detailed_message or NULL
1916 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1917 PRESERVE_EXCEPTION_MARK; // Keep original exception
1918 oop detailed_message = java_lang_Throwable::message(throwable);
1919 if (detailed_message != NULL) {
1920 return java_lang_String::as_symbol(detailed_message, THREAD);
1921 }
1922 return NULL;
1923 }
1924
1925 void java_lang_Throwable::set_message(oop throwable, oop value) {
1926 throwable->obj_field_put(detailMessage_offset, value);
1927 }
1928
1929
1930 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1931 throwable->obj_field_put(stackTrace_offset, st_element_array);
1932 }
1933
1934 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1935 set_stacktrace(throwable, NULL);
1936 }
1937
1938
1939 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1940 ResourceMark rm;
1941 Klass* k = throwable->klass();
1942 assert(k != NULL, "just checking");
1943 st->print("%s", k->external_name());
1944 oop msg = message(throwable);
1945 if (msg != NULL) {
1946 st->print(": %s", java_lang_String::as_utf8_string(msg));
1947 }
1948 }
1949
1950 // After this many redefines, the stack trace is unreliable.
1951 const int MAX_VERSION = USHRT_MAX;
1952
1953 static inline bool version_matches(Method* method, int version) {
1954 assert(version < MAX_VERSION, "version is too big");
1955 return method != NULL && (method->constants()->version() == version);
1956 }
1957
1958
1959 // This class provides a simple wrapper over the internal structure of
1960 // exception backtrace to insulate users of the backtrace from needing
1961 // to know what it looks like.
1962 class BacktraceBuilder: public StackObj {
1963 friend class BacktraceIterator;
1964 private:
1965 Handle _backtrace;
1966 objArrayOop _head;
1967 typeArrayOop _methods;
1968 typeArrayOop _bcis;
1969 objArrayOop _mirrors;
1970 typeArrayOop _names; // needed to insulate method name against redefinition
1971 int _index;
1972 NoSafepointVerifier _nsv;
1973
1974 enum {
1975 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1976 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1977 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1978 trace_names_offset = java_lang_Throwable::trace_names_offset,
1979 trace_next_offset = java_lang_Throwable::trace_next_offset,
1980 trace_size = java_lang_Throwable::trace_size,
1981 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1982 };
1983
1984 // get info out of chunks
1985 static typeArrayOop get_methods(objArrayHandle chunk) {
1986 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1987 assert(methods != NULL, "method array should be initialized in backtrace");
1988 return methods;
1989 }
1990 static typeArrayOop get_bcis(objArrayHandle chunk) {
1991 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1992 assert(bcis != NULL, "bci array should be initialized in backtrace");
1993 return bcis;
1994 }
1995 static objArrayOop get_mirrors(objArrayHandle chunk) {
1996 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1997 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1998 return mirrors;
1999 }
2000 static typeArrayOop get_names(objArrayHandle chunk) {
2001 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2002 assert(names != NULL, "names array should be initialized in backtrace");
2003 return names;
2004 }
2005
2006 public:
2007
2008 // constructor for new backtrace
2009 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2010 expand(CHECK);
2011 _backtrace = Handle(THREAD, _head);
2012 _index = 0;
2013 }
2014
2015 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2016 _methods = get_methods(backtrace);
2017 _bcis = get_bcis(backtrace);
2018 _mirrors = get_mirrors(backtrace);
2019 _names = get_names(backtrace);
2020 assert(_methods->length() == _bcis->length() &&
2021 _methods->length() == _mirrors->length() &&
2022 _mirrors->length() == _names->length(),
2023 "method and source information arrays should match");
2024
2025 // head is the preallocated backtrace
2026 _head = backtrace();
2027 _backtrace = Handle(thread, _head);
2028 _index = 0;
2029 }
2030
2031 void expand(TRAPS) {
2032 objArrayHandle old_head(THREAD, _head);
2033 PauseNoSafepointVerifier pnsv(&_nsv);
2034
2035 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2036 objArrayHandle new_head(THREAD, head);
2037
2038 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2039 typeArrayHandle new_methods(THREAD, methods);
2040
2041 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2042 typeArrayHandle new_bcis(THREAD, bcis);
2043
2044 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2045 objArrayHandle new_mirrors(THREAD, mirrors);
2046
2047 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2048 typeArrayHandle new_names(THREAD, names);
2049
2050 if (!old_head.is_null()) {
2051 old_head->obj_at_put(trace_next_offset, new_head());
2052 }
2053 new_head->obj_at_put(trace_methods_offset, new_methods());
2054 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2055 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2056 new_head->obj_at_put(trace_names_offset, new_names());
2057
2058 _head = new_head();
2059 _methods = new_methods();
2060 _bcis = new_bcis();
2061 _mirrors = new_mirrors();
2062 _names = new_names();
2063 _index = 0;
2064 }
2065
2066 oop backtrace() {
2067 return _backtrace();
2068 }
2069
2070 inline void push(Method* method, int bci, TRAPS) {
2071 // Smear the -1 bci to 0 since the array only holds unsigned
2072 // shorts. The later line number lookup would just smear the -1
2073 // to a 0 even if it could be recorded.
2074 if (bci == SynchronizationEntryBCI) bci = 0;
2075
2076 if (_index >= trace_chunk_size) {
2077 methodHandle mhandle(THREAD, method);
2078 expand(CHECK);
2079 method = mhandle();
2080 }
2081
2082 _methods->ushort_at_put(_index, method->orig_method_idnum());
2083 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2084
2085 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2086 // klass owning the symbols alive so their refcounts aren't decremented.
2087 Symbol* name = method->name();
2088 _names->symbol_at_put(_index, name);
2089
2090 // We need to save the mirrors in the backtrace to keep the class
2091 // from being unloaded while we still have this stack trace.
2092 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2093 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2094 _index++;
2095 }
2096
2097 };
2098
2099 struct BacktraceElement : public StackObj {
2100 int _method_id;
2101 int _bci;
2102 int _version;
2103 Symbol* _name;
2104 Handle _mirror;
2105 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2106 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2107 };
2108
2109 class BacktraceIterator : public StackObj {
2110 int _index;
2111 objArrayHandle _result;
2112 objArrayHandle _mirrors;
2113 typeArrayHandle _methods;
2114 typeArrayHandle _bcis;
2115 typeArrayHandle _names;
2116
2117 void init(objArrayHandle result, Thread* thread) {
2118 // Get method id, bci, version and mirror from chunk
2119 _result = result;
2120 if (_result.not_null()) {
2121 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2122 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2123 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2124 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2125 _index = 0;
2126 }
2127 }
2128 public:
2129 BacktraceIterator(objArrayHandle result, Thread* thread) {
2130 init(result, thread);
2131 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2132 }
2133
2134 BacktraceElement next(Thread* thread) {
2135 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2136 _methods->ushort_at(_index),
2137 Backtrace::version_at(_bcis->int_at(_index)),
2138 Backtrace::bci_at(_bcis->int_at(_index)),
2139 _names->symbol_at(_index));
2140 _index++;
2141
2142 if (_index >= java_lang_Throwable::trace_chunk_size) {
2143 int next_offset = java_lang_Throwable::trace_next_offset;
2144 // Get next chunk
2145 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2146 init(result, thread);
2147 }
2148 return e;
2149 }
2150
2151 bool repeat() {
2152 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2153 }
2154 };
2155
2156
2157 // Print stack trace element to resource allocated buffer
2158 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2159 int version, int bci, Symbol* name) {
2160 ResourceMark rm;
2161
2162 // Get strings and string lengths
2163 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2164 const char* klass_name = holder->external_name();
2165 int buf_len = (int)strlen(klass_name);
2166
2167 char* method_name = name->as_C_string();
2168 buf_len += (int)strlen(method_name);
2169
2170 char* source_file_name = NULL;
2171 Symbol* source = Backtrace::get_source_file_name(holder, version);
2172 if (source != NULL) {
2173 source_file_name = source->as_C_string();
2174 buf_len += (int)strlen(source_file_name);
2175 }
2176
2177 char *module_name = NULL, *module_version = NULL;
2178 ModuleEntry* module = holder->module();
2179 if (module->is_named()) {
2180 module_name = module->name()->as_C_string();
2181 buf_len += (int)strlen(module_name);
2182 if (module->version() != NULL) {
2183 module_version = module->version()->as_C_string();
2184 buf_len += (int)strlen(module_version);
2185 }
2186 }
2187
2188 // Allocate temporary buffer with extra space for formatting and line number
2189 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2190
2191 // Print stack trace line in buffer
2192 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2193
2194 // Print module information
2195 if (module_name != NULL) {
2196 if (module_version != NULL) {
2197 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2198 } else {
2199 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2200 }
2201 }
2202
2203 // The method can be NULL if the requested class version is gone
2204 Method* method = holder->method_with_orig_idnum(method_id, version);
2205 if (!version_matches(method, version)) {
2206 strcat(buf, "Redefined)");
2207 } else {
2208 int line_number = Backtrace::get_line_number(method, bci);
2209 if (line_number == -2) {
2210 strcat(buf, "Native Method)");
2211 } else {
2212 if (source_file_name != NULL && (line_number != -1)) {
2213 // Sourcename and linenumber
2214 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2215 } else if (source_file_name != NULL) {
2216 // Just sourcename
2217 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2218 } else {
2219 // Neither sourcename nor linenumber
2220 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2221 }
2222 CompiledMethod* nm = method->code();
2223 if (WizardMode && nm != NULL) {
2224 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2225 }
2226 }
2227 }
2228
2229 st->print_cr("%s", buf);
2230 }
2231
2232 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2233 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2234 int method_id = method->orig_method_idnum();
2235 int version = method->constants()->version();
2236 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2237 }
2238
2239 /**
2240 * Print the throwable message and its stack trace plus all causes by walking the
2241 * cause chain. The output looks the same as of Throwable.printStackTrace().
2242 */
2243 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2244 // First, print the message.
2245 print(throwable(), st);
2246 st->cr();
2247
2248 // Now print the stack trace.
2249 Thread* THREAD = Thread::current();
2250 while (throwable.not_null()) {
2251 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2252 if (result.is_null()) {
2253 st->print_raw_cr("\t<<no stack trace available>>");
2254 return;
2255 }
2256 BacktraceIterator iter(result, THREAD);
2257
2258 while (iter.repeat()) {
2259 BacktraceElement bte = iter.next(THREAD);
2260 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2261 }
2262 {
2263 // Call getCause() which doesn't necessarily return the _cause field.
2264 EXCEPTION_MARK;
2265 JavaValue cause(T_OBJECT);
2266 JavaCalls::call_virtual(&cause,
2267 throwable,
2268 throwable->klass(),
2269 vmSymbols::getCause_name(),
2270 vmSymbols::void_throwable_signature(),
2271 THREAD);
2272 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2273 if (HAS_PENDING_EXCEPTION) {
2274 CLEAR_PENDING_EXCEPTION;
2275 throwable = Handle();
2276 } else {
2277 throwable = Handle(THREAD, (oop) cause.get_jobject());
2278 if (throwable.not_null()) {
2279 st->print("Caused by: ");
2280 print(throwable(), st);
2281 st->cr();
2282 }
2283 }
2284 }
2285 }
2286 }
2287
2288 /**
2289 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2290 */
2291 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2292 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2293 JavaValue result(T_VOID);
2294 JavaCalls::call_virtual(&result,
2295 throwable,
2296 SystemDictionary::Throwable_klass(),
2297 vmSymbols::printStackTrace_name(),
2298 vmSymbols::void_method_signature(),
2299 THREAD);
2300 }
2301
2302 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2303 if (!StackTraceInThrowable) return;
2304 ResourceMark rm(THREAD);
2305
2306 // Start out by clearing the backtrace for this object, in case the VM
2307 // runs out of memory while allocating the stack trace
2308 set_backtrace(throwable(), NULL);
2309 // Clear lazily constructed Java level stacktrace if refilling occurs
2310 // This is unnecessary in 1.7+ but harmless
2311 clear_stacktrace(throwable());
2312
2313 int max_depth = MaxJavaStackTraceDepth;
2314 JavaThread* thread = (JavaThread*)THREAD;
2315
2316 BacktraceBuilder bt(CHECK);
2317
2318 // If there is no Java frame just return the method that was being called
2319 // with bci 0
2320 if (!thread->has_last_Java_frame()) {
2321 if (max_depth >= 1 && method() != NULL) {
2322 bt.push(method(), 0, CHECK);
2323 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2324 set_depth(throwable(), 1);
2325 set_backtrace(throwable(), bt.backtrace());
2326 }
2327 return;
2328 }
2329
2330 // Instead of using vframe directly, this version of fill_in_stack_trace
2331 // basically handles everything by hand. This significantly improved the
2332 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2333 // See bug 6333838 for more details.
2334 // The "ASSERT" here is to verify this method generates the exactly same stack
2335 // trace as utilizing vframe.
2336 #ifdef ASSERT
2337 vframeStream st(thread);
2338 methodHandle st_method(THREAD, st.method());
2339 #endif
2340 int total_count = 0;
2341 RegisterMap map(thread, false);
2342 int decode_offset = 0;
2343 CompiledMethod* nm = NULL;
2344 bool skip_fillInStackTrace_check = false;
2345 bool skip_throwableInit_check = false;
2346 bool skip_hidden = !ShowHiddenFrames;
2347
2348 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2349 Method* method = NULL;
2350 int bci = 0;
2351
2352 // Compiled java method case.
2353 if (decode_offset != 0) {
2354 DebugInfoReadStream stream(nm, decode_offset);
2355 decode_offset = stream.read_int();
2356 method = (Method*)nm->metadata_at(stream.read_int());
2357 bci = stream.read_bci();
2358 } else {
2359 if (fr.is_first_frame()) break;
2360 address pc = fr.pc();
2361 if (fr.is_interpreted_frame()) {
2362 address bcp = fr.interpreter_frame_bcp();
2363 method = fr.interpreter_frame_method();
2364 bci = method->bci_from(bcp);
2365 fr = fr.sender(&map);
2366 } else {
2367 CodeBlob* cb = fr.cb();
2368 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2369 // but non nmethod
2370 fr = fr.sender(&map);
2371 if (cb == NULL || !cb->is_compiled()) {
2372 continue;
2373 }
2374 nm = cb->as_compiled_method();
2375 if (nm->method()->is_native()) {
2376 method = nm->method();
2377 bci = 0;
2378 } else {
2379 PcDesc* pd = nm->pc_desc_at(pc);
2380 decode_offset = pd->scope_decode_offset();
2381 // if decode_offset is not equal to 0, it will execute the
2382 // "compiled java method case" at the beginning of the loop.
2383 continue;
2384 }
2385 }
2386 }
2387 #ifdef ASSERT
2388 assert(st_method() == method && st.bci() == bci,
2389 "Wrong stack trace");
2390 st.next();
2391 // vframeStream::method isn't GC-safe so store off a copy
2392 // of the Method* in case we GC.
2393 if (!st.at_end()) {
2394 st_method = st.method();
2395 }
2396 #endif
2397
2398 // the format of the stacktrace will be:
2399 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2400 // - 0 or more <init> methods for the exception class (skipped)
2401 // - rest of the stack
2402
2403 if (!skip_fillInStackTrace_check) {
2404 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2405 throwable->is_a(method->method_holder())) {
2406 continue;
2407 }
2408 else {
2409 skip_fillInStackTrace_check = true; // gone past them all
2410 }
2411 }
2412 if (!skip_throwableInit_check) {
2413 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2414
2415 // skip <init> methods of the exception class and superclasses
2416 // This is simlar to classic VM.
2417 if (method->name() == vmSymbols::object_initializer_name() &&
2418 throwable->is_a(method->method_holder())) {
2419 continue;
2420 } else {
2421 // there are none or we've seen them all - either way stop checking
2422 skip_throwableInit_check = true;
2423 }
2424 }
2425 if (method->is_hidden()) {
2426 if (skip_hidden) continue;
2427 }
2428 bt.push(method, bci, CHECK);
2429 total_count++;
2430 }
2431
2432 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2433
2434 // Put completed stack trace into throwable object
2435 set_backtrace(throwable(), bt.backtrace());
2436 set_depth(throwable(), total_count);
2437 }
2438
2439 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2440 // No-op if stack trace is disabled
2441 if (!StackTraceInThrowable) {
2442 return;
2443 }
2444
2445 // Disable stack traces for some preallocated out of memory errors
2446 if (!Universe::should_fill_in_stack_trace(throwable)) {
2447 return;
2448 }
2449
2450 PRESERVE_EXCEPTION_MARK;
2451
2452 JavaThread* thread = JavaThread::active();
2453 fill_in_stack_trace(throwable, method, thread);
2454 // ignore exceptions thrown during stack trace filling
2455 CLEAR_PENDING_EXCEPTION;
2456 }
2457
2458 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2459 // Allocate stack trace - backtrace is created but not filled in
2460
2461 // No-op if stack trace is disabled
2462 if (!StackTraceInThrowable) return;
2463 BacktraceBuilder bt(CHECK); // creates a backtrace
2464 set_backtrace(throwable(), bt.backtrace());
2465 }
2466
2467
2468 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2469 // Fill in stack trace into preallocated backtrace (no GC)
2470
2471 // No-op if stack trace is disabled
2472 if (!StackTraceInThrowable) return;
2473
2474 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2475
2476 JavaThread* THREAD = JavaThread::current();
2477
2478 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2479 assert(backtrace.not_null(), "backtrace should have been preallocated");
2480
2481 ResourceMark rm(THREAD);
2482 vframeStream st(THREAD);
2483
2484 BacktraceBuilder bt(THREAD, backtrace);
2485
2486 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2487 // methods as preallocated errors aren't created by "java" code.
2488
2489 // fill in as much stack trace as possible
2490 int chunk_count = 0;
2491 for (;!st.at_end(); st.next()) {
2492 bt.push(st.method(), st.bci(), CHECK);
2493 chunk_count++;
2494
2495 // Bail-out for deep stacks
2496 if (chunk_count >= trace_chunk_size) break;
2497 }
2498 set_depth(throwable(), chunk_count);
2499 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2500
2501 // We support the Throwable immutability protocol defined for Java 7.
2502 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2503 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2504 }
2505
2506 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2507 objArrayHandle stack_trace_array_h, TRAPS) {
2508
2509 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2510 THROW(vmSymbols::java_lang_NullPointerException());
2511 }
2512
2513 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2514
2515 if (stack_trace_array_h->length() != depth(throwable())) {
2516 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2517 }
2518
2519 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2520 BacktraceIterator iter(result, THREAD);
2521
2522 int index = 0;
2523 while (iter.repeat()) {
2524 BacktraceElement bte = iter.next(THREAD);
2525
2526 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2527
2528 if (stack_trace_element.is_null()) {
2529 THROW(vmSymbols::java_lang_NullPointerException());
2530 }
2531
2532 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2533 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2534
2535 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2536 method,
2537 bte._version,
2538 bte._bci,
2539 bte._name, CHECK);
2540 }
2541 }
2542
2543 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2544 // Allocate java.lang.StackTraceElement instance
2545 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2546 assert(k != NULL, "must be loaded in 1.4+");
2547 if (k->should_be_initialized()) {
2548 k->initialize(CHECK_0);
2549 }
2550
2551 Handle element = k->allocate_instance_handle(CHECK_0);
2552
2553 int version = method->constants()->version();
2554 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2555 return element();
2556 }
2557
2558 void java_lang_StackTraceElement::fill_in(Handle element,
2559 InstanceKlass* holder, const methodHandle& method,
2560 int version, int bci, Symbol* name, TRAPS) {
2561 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2562
2563 // Fill in class name
2564 ResourceMark rm(THREAD);
2565 const char* str = holder->external_name();
2566 oop classname = StringTable::intern((char*) str, CHECK);
2567 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2568 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror());
2569
2570 oop loader = holder->class_loader();
2571 if (loader != NULL) {
2572 oop loader_name = java_lang_ClassLoader::name(loader);
2573 if (loader_name != NULL)
2574 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2575 }
2576
2577 // Fill in method name
2578 oop methodname = StringTable::intern(name, CHECK);
2579 java_lang_StackTraceElement::set_methodName(element(), methodname);
2580
2581 // Fill in module name and version
2582 ModuleEntry* module = holder->module();
2583 if (module->is_named()) {
2584 oop module_name = StringTable::intern(module->name(), CHECK);
2585 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2586 oop module_version;
2587 if (module->version() != NULL) {
2588 module_version = StringTable::intern(module->version(), CHECK);
2589 } else {
2590 module_version = NULL;
2591 }
2592 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2593 }
2594
2595 if (method() == NULL || !version_matches(method(), version)) {
2596 // The method was redefined, accurate line number information isn't available
2597 java_lang_StackTraceElement::set_fileName(element(), NULL);
2598 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2599 } else {
2600 // Fill in source file name and line number.
2601 Symbol* source = Backtrace::get_source_file_name(holder, version);
2602 if (ShowHiddenFrames && source == NULL)
2603 source = vmSymbols::unknown_class_name();
2604 oop filename = StringTable::intern(source, CHECK);
2605 java_lang_StackTraceElement::set_fileName(element(), filename);
2606
2607 int line_number = Backtrace::get_line_number(method, bci);
2608 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2609 }
2610 }
2611
2612 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2613 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2614 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2615 // we should expand MemberName::name when Throwable uses StackTrace
2616 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2617 return method;
2618 }
2619
2620 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2621 // set Method* or mid/cpref
2622 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2623 InstanceKlass* ik = method->method_holder();
2624 CallInfo info(method(), ik, CHECK);
2625 MethodHandles::init_method_MemberName(mname, info);
2626 // set bci
2627 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2628 // method may be redefined; store the version
2629 int version = method->constants()->version();
2630 assert((jushort)version == version, "version should be short");
2631 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2632 }
2633
2634 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2635 ResourceMark rm(THREAD);
2636 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2637 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2638 InstanceKlass* holder = InstanceKlass::cast(clazz);
2639 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2640
2641 short version = stackFrame->short_field(_version_offset);
2642 short bci = stackFrame->short_field(_bci_offset);
2643 Symbol* name = method->name();
2644 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2645 }
2646
2647 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2648 macro(_memberName_offset, k, "memberName", object_signature, false); \
2649 macro(_bci_offset, k, "bci", short_signature, false)
2650
2651 void java_lang_StackFrameInfo::compute_offsets() {
2652 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2653 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2654 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2655 }
2656
2657 #if INCLUDE_CDS
2658 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2659 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2660 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2661 }
2662 #endif
2663
2664 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2665 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2666 macro(_locals_offset, k, "locals", object_array_signature, false); \
2667 macro(_operands_offset, k, "operands", object_array_signature, false); \
2668 macro(_mode_offset, k, "mode", int_signature, false)
2669
2670 void java_lang_LiveStackFrameInfo::compute_offsets() {
2671 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2672 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2673 }
2674
2675 #if INCLUDE_CDS
2676 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2677 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2678 }
2679 #endif
2680
2681 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2682 macro(override_offset, k, "override", bool_signature, false)
2683
2684 void java_lang_reflect_AccessibleObject::compute_offsets() {
2685 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2686 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2687 }
2688
2689 #if INCLUDE_CDS
2690 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2691 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2692 }
2693 #endif
2694
2695 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2696 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2697 return (jboolean) reflect->bool_field(override_offset);
2698 }
2699
2700 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2701 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2702 reflect->bool_field_put(override_offset, (int) value);
2703 }
2704
2705 #define METHOD_FIELDS_DO(macro) \
2706 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2707 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2708 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2709 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2710 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2711 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2712 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2713 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \
2714 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \
2715 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \
2716 macro##_OPTIONAL(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature); \
2717 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature)
2718
2719 void java_lang_reflect_Method::compute_offsets() {
2720 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2721 // The generic signature and annotations fields are only present in 1.5
2722 signature_offset = -1;
2723 annotations_offset = -1;
2724 parameter_annotations_offset = -1;
2725 annotation_default_offset = -1;
2726 type_annotations_offset = -1;
2727 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2728 }
2729
2730 #if INCLUDE_CDS
2731 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2732 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2733 }
2734 #endif
2735
2736 Handle java_lang_reflect_Method::create(TRAPS) {
2737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2738 Klass* klass = SystemDictionary::reflect_Method_klass();
2739 // This class is eagerly initialized during VM initialization, since we keep a refence
2740 // to one of the methods
2741 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2742 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2743 }
2744
2745 oop java_lang_reflect_Method::clazz(oop reflect) {
2746 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2747 return reflect->obj_field(clazz_offset);
2748 }
2749
2750 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2751 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2752 reflect->obj_field_put(clazz_offset, value);
2753 }
2754
2755 int java_lang_reflect_Method::slot(oop reflect) {
2756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2757 return reflect->int_field(slot_offset);
2758 }
2759
2760 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2761 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2762 reflect->int_field_put(slot_offset, value);
2763 }
2764
2765 oop java_lang_reflect_Method::name(oop method) {
2766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2767 return method->obj_field(name_offset);
2768 }
2769
2770 void java_lang_reflect_Method::set_name(oop method, oop value) {
2771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2772 method->obj_field_put(name_offset, value);
2773 }
2774
2775 oop java_lang_reflect_Method::return_type(oop method) {
2776 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2777 return method->obj_field(returnType_offset);
2778 }
2779
2780 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2782 method->obj_field_put(returnType_offset, value);
2783 }
2784
2785 oop java_lang_reflect_Method::parameter_types(oop method) {
2786 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2787 return method->obj_field(parameterTypes_offset);
2788 }
2789
2790 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2792 method->obj_field_put(parameterTypes_offset, value);
2793 }
2794
2795 oop java_lang_reflect_Method::exception_types(oop method) {
2796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2797 return method->obj_field(exceptionTypes_offset);
2798 }
2799
2800 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2802 method->obj_field_put(exceptionTypes_offset, value);
2803 }
2804
2805 int java_lang_reflect_Method::modifiers(oop method) {
2806 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2807 return method->int_field(modifiers_offset);
2808 }
2809
2810 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2811 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2812 method->int_field_put(modifiers_offset, value);
2813 }
2814
2815 bool java_lang_reflect_Method::has_signature_field() {
2816 return (signature_offset >= 0);
2817 }
2818
2819 oop java_lang_reflect_Method::signature(oop method) {
2820 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2821 assert(has_signature_field(), "signature field must be present");
2822 return method->obj_field(signature_offset);
2823 }
2824
2825 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2826 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2827 assert(has_signature_field(), "signature field must be present");
2828 method->obj_field_put(signature_offset, value);
2829 }
2830
2831 bool java_lang_reflect_Method::has_annotations_field() {
2832 return (annotations_offset >= 0);
2833 }
2834
2835 oop java_lang_reflect_Method::annotations(oop method) {
2836 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2837 assert(has_annotations_field(), "annotations field must be present");
2838 return method->obj_field(annotations_offset);
2839 }
2840
2841 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2843 assert(has_annotations_field(), "annotations field must be present");
2844 method->obj_field_put(annotations_offset, value);
2845 }
2846
2847 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2848 return (parameter_annotations_offset >= 0);
2849 }
2850
2851 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2852 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2853 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2854 return method->obj_field(parameter_annotations_offset);
2855 }
2856
2857 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2858 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2859 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2860 method->obj_field_put(parameter_annotations_offset, value);
2861 }
2862
2863 bool java_lang_reflect_Method::has_annotation_default_field() {
2864 return (annotation_default_offset >= 0);
2865 }
2866
2867 oop java_lang_reflect_Method::annotation_default(oop method) {
2868 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2869 assert(has_annotation_default_field(), "annotation default field must be present");
2870 return method->obj_field(annotation_default_offset);
2871 }
2872
2873 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2874 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2875 assert(has_annotation_default_field(), "annotation default field must be present");
2876 method->obj_field_put(annotation_default_offset, value);
2877 }
2878
2879 bool java_lang_reflect_Method::has_type_annotations_field() {
2880 return (type_annotations_offset >= 0);
2881 }
2882
2883 oop java_lang_reflect_Method::type_annotations(oop method) {
2884 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2885 assert(has_type_annotations_field(), "type_annotations field must be present");
2886 return method->obj_field(type_annotations_offset);
2887 }
2888
2889 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2891 assert(has_type_annotations_field(), "type_annotations field must be present");
2892 method->obj_field_put(type_annotations_offset, value);
2893 }
2894
2895 #define CONSTRUCTOR_FIELDS_DO(macro) \
2896 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2897 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2898 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2899 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2900 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2901 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \
2902 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \
2903 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \
2904 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature)
2905
2906
2907 void java_lang_reflect_Constructor::compute_offsets() {
2908 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2909 // The generic signature and annotations fields are only present in 1.5
2910 signature_offset = -1;
2911 annotations_offset = -1;
2912 parameter_annotations_offset = -1;
2913 type_annotations_offset = -1;
2914 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2915 }
2916
2917 #if INCLUDE_CDS
2918 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2919 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2920 }
2921 #endif
2922
2923 Handle java_lang_reflect_Constructor::create(TRAPS) {
2924 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2925 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2926 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2927 InstanceKlass* ik = InstanceKlass::cast(k);
2928 // Ensure it is initialized
2929 ik->initialize(CHECK_NH);
2930 return ik->allocate_instance_handle(THREAD);
2931 }
2932
2933 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2934 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2935 return reflect->obj_field(clazz_offset);
2936 }
2937
2938 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2939 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2940 reflect->obj_field_put(clazz_offset, value);
2941 }
2942
2943 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2944 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2945 return constructor->obj_field(parameterTypes_offset);
2946 }
2947
2948 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2949 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2950 constructor->obj_field_put(parameterTypes_offset, value);
2951 }
2952
2953 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2954 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2955 return constructor->obj_field(exceptionTypes_offset);
2956 }
2957
2958 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2959 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2960 constructor->obj_field_put(exceptionTypes_offset, value);
2961 }
2962
2963 int java_lang_reflect_Constructor::slot(oop reflect) {
2964 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2965 return reflect->int_field(slot_offset);
2966 }
2967
2968 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2969 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2970 reflect->int_field_put(slot_offset, value);
2971 }
2972
2973 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2975 return constructor->int_field(modifiers_offset);
2976 }
2977
2978 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2979 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2980 constructor->int_field_put(modifiers_offset, value);
2981 }
2982
2983 bool java_lang_reflect_Constructor::has_signature_field() {
2984 return (signature_offset >= 0);
2985 }
2986
2987 oop java_lang_reflect_Constructor::signature(oop constructor) {
2988 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2989 assert(has_signature_field(), "signature field must be present");
2990 return constructor->obj_field(signature_offset);
2991 }
2992
2993 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2994 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2995 assert(has_signature_field(), "signature field must be present");
2996 constructor->obj_field_put(signature_offset, value);
2997 }
2998
2999 bool java_lang_reflect_Constructor::has_annotations_field() {
3000 return (annotations_offset >= 0);
3001 }
3002
3003 oop java_lang_reflect_Constructor::annotations(oop constructor) {
3004 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3005 assert(has_annotations_field(), "annotations field must be present");
3006 return constructor->obj_field(annotations_offset);
3007 }
3008
3009 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3010 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3011 assert(has_annotations_field(), "annotations field must be present");
3012 constructor->obj_field_put(annotations_offset, value);
3013 }
3014
3015 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
3016 return (parameter_annotations_offset >= 0);
3017 }
3018
3019 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
3020 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3021 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
3022 return method->obj_field(parameter_annotations_offset);
3023 }
3024
3025 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3026 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3027 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
3028 method->obj_field_put(parameter_annotations_offset, value);
3029 }
3030
3031 bool java_lang_reflect_Constructor::has_type_annotations_field() {
3032 return (type_annotations_offset >= 0);
3033 }
3034
3035 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
3036 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3037 assert(has_type_annotations_field(), "type_annotations field must be present");
3038 return constructor->obj_field(type_annotations_offset);
3039 }
3040
3041 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
3042 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3043 assert(has_type_annotations_field(), "type_annotations field must be present");
3044 constructor->obj_field_put(type_annotations_offset, value);
3045 }
3046
3047 #define FIELD_FIELDS_DO(macro) \
3048 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3049 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3050 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3051 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3052 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3053 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \
3054 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \
3055 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature)
3056
3057 void java_lang_reflect_Field::compute_offsets() {
3058 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3059 // The generic signature and annotations fields are only present in 1.5
3060 signature_offset = -1;
3061 annotations_offset = -1;
3062 type_annotations_offset = -1;
3063 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3064 }
3065
3066 #if INCLUDE_CDS
3067 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3068 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3069 }
3070 #endif
3071
3072 Handle java_lang_reflect_Field::create(TRAPS) {
3073 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3074 Symbol* name = vmSymbols::java_lang_reflect_Field();
3075 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3076 InstanceKlass* ik = InstanceKlass::cast(k);
3077 // Ensure it is initialized
3078 ik->initialize(CHECK_NH);
3079 return ik->allocate_instance_handle(THREAD);
3080 }
3081
3082 oop java_lang_reflect_Field::clazz(oop reflect) {
3083 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3084 return reflect->obj_field(clazz_offset);
3085 }
3086
3087 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3088 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3089 reflect->obj_field_put(clazz_offset, value);
3090 }
3091
3092 oop java_lang_reflect_Field::name(oop field) {
3093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3094 return field->obj_field(name_offset);
3095 }
3096
3097 void java_lang_reflect_Field::set_name(oop field, oop value) {
3098 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3099 field->obj_field_put(name_offset, value);
3100 }
3101
3102 oop java_lang_reflect_Field::type(oop field) {
3103 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3104 return field->obj_field(type_offset);
3105 }
3106
3107 void java_lang_reflect_Field::set_type(oop field, oop value) {
3108 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3109 field->obj_field_put(type_offset, value);
3110 }
3111
3112 int java_lang_reflect_Field::slot(oop reflect) {
3113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3114 return reflect->int_field(slot_offset);
3115 }
3116
3117 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3118 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3119 reflect->int_field_put(slot_offset, value);
3120 }
3121
3122 int java_lang_reflect_Field::modifiers(oop field) {
3123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3124 return field->int_field(modifiers_offset);
3125 }
3126
3127 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3128 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3129 field->int_field_put(modifiers_offset, value);
3130 }
3131
3132 bool java_lang_reflect_Field::has_signature_field() {
3133 return (signature_offset >= 0);
3134 }
3135
3136 oop java_lang_reflect_Field::signature(oop field) {
3137 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3138 assert(has_signature_field(), "signature field must be present");
3139 return field->obj_field(signature_offset);
3140 }
3141
3142 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3143 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3144 assert(has_signature_field(), "signature field must be present");
3145 field->obj_field_put(signature_offset, value);
3146 }
3147
3148 bool java_lang_reflect_Field::has_annotations_field() {
3149 return (annotations_offset >= 0);
3150 }
3151
3152 oop java_lang_reflect_Field::annotations(oop field) {
3153 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3154 assert(has_annotations_field(), "annotations field must be present");
3155 return field->obj_field(annotations_offset);
3156 }
3157
3158 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3159 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3160 assert(has_annotations_field(), "annotations field must be present");
3161 field->obj_field_put(annotations_offset, value);
3162 }
3163
3164 bool java_lang_reflect_Field::has_type_annotations_field() {
3165 return (type_annotations_offset >= 0);
3166 }
3167
3168 oop java_lang_reflect_Field::type_annotations(oop field) {
3169 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3170 assert(has_type_annotations_field(), "type_annotations field must be present");
3171 return field->obj_field(type_annotations_offset);
3172 }
3173
3174 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
3175 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3176 assert(has_type_annotations_field(), "type_annotations field must be present");
3177 field->obj_field_put(type_annotations_offset, value);
3178 }
3179
3180 #define CONSTANTPOOL_FIELDS_DO(macro) \
3181 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3182
3183 void reflect_ConstantPool::compute_offsets() {
3184 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3185 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3186 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3187 }
3188
3189 #if INCLUDE_CDS
3190 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3191 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3192 }
3193 #endif
3194
3195 #define PARAMETER_FIELDS_DO(macro) \
3196 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3197 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3198 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3199 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3200
3201 void java_lang_reflect_Parameter::compute_offsets() {
3202 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3203 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3204 }
3205
3206 #if INCLUDE_CDS
3207 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3208 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3209 }
3210 #endif
3211
3212 Handle java_lang_reflect_Parameter::create(TRAPS) {
3213 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3214 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3215 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3216 InstanceKlass* ik = InstanceKlass::cast(k);
3217 // Ensure it is initialized
3218 ik->initialize(CHECK_NH);
3219 return ik->allocate_instance_handle(THREAD);
3220 }
3221
3222 oop java_lang_reflect_Parameter::name(oop param) {
3223 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3224 return param->obj_field(name_offset);
3225 }
3226
3227 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3228 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3229 param->obj_field_put(name_offset, value);
3230 }
3231
3232 int java_lang_reflect_Parameter::modifiers(oop param) {
3233 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3234 return param->int_field(modifiers_offset);
3235 }
3236
3237 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3238 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3239 param->int_field_put(modifiers_offset, value);
3240 }
3241
3242 int java_lang_reflect_Parameter::index(oop param) {
3243 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3244 return param->int_field(index_offset);
3245 }
3246
3247 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3248 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3249 param->int_field_put(index_offset, value);
3250 }
3251
3252 oop java_lang_reflect_Parameter::executable(oop param) {
3253 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3254 return param->obj_field(executable_offset);
3255 }
3256
3257 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3258 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3259 param->obj_field_put(executable_offset, value);
3260 }
3261
3262
3263 int java_lang_Module::loader_offset;
3264 int java_lang_Module::name_offset;
3265 int java_lang_Module::_module_entry_offset = -1;
3266
3267 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3268 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3269 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3270 vmSymbols::java_lang_module_init_signature(),
3271 loader, module_name, CHECK_NH);
3272 }
3273
3274 #define MODULE_FIELDS_DO(macro) \
3275 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3276 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3277
3278 void java_lang_Module::compute_offsets() {
3279 InstanceKlass* k = SystemDictionary::Module_klass();
3280 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3281 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3282 }
3283
3284 #if INCLUDE_CDS
3285 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3286 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3287 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3288 }
3289 #endif
3290
3291 oop java_lang_Module::loader(oop module) {
3292 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3293 return module->obj_field(loader_offset);
3294 }
3295
3296 void java_lang_Module::set_loader(oop module, oop value) {
3297 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3298 module->obj_field_put(loader_offset, value);
3299 }
3300
3301 oop java_lang_Module::name(oop module) {
3302 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3303 return module->obj_field(name_offset);
3304 }
3305
3306 void java_lang_Module::set_name(oop module, oop value) {
3307 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3308 module->obj_field_put(name_offset, value);
3309 }
3310
3311 ModuleEntry* java_lang_Module::module_entry(oop module) {
3312 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3313 assert(module != NULL, "module can't be null");
3314 assert(oopDesc::is_oop(module), "module must be oop");
3315
3316 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3317 if (module_entry == NULL) {
3318 // If the inject field containing the ModuleEntry* is null then return the
3319 // class loader's unnamed module.
3320 oop loader = java_lang_Module::loader(module);
3321 Handle h_loader = Handle(Thread::current(), loader);
3322 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3323 return loader_cld->unnamed_module();
3324 }
3325 return module_entry;
3326 }
3327
3328 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3329 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3330 assert(module != NULL, "module can't be null");
3331 assert(oopDesc::is_oop(module), "module must be oop");
3332 module->address_field_put(_module_entry_offset, (address)module_entry);
3333 }
3334
3335 Handle reflect_ConstantPool::create(TRAPS) {
3336 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3337 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3338 // Ensure it is initialized
3339 k->initialize(CHECK_NH);
3340 return k->allocate_instance_handle(THREAD);
3341 }
3342
3343
3344 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3346 oop mirror = value->pool_holder()->java_mirror();
3347 // Save the mirror to get back the constant pool.
3348 reflect->obj_field_put(_oop_offset, mirror);
3349 }
3350
3351 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3352 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3353
3354 oop mirror = reflect->obj_field(_oop_offset);
3355 Klass* k = java_lang_Class::as_Klass(mirror);
3356 assert(k->is_instance_klass(), "Must be");
3357
3358 // Get the constant pool back from the klass. Since class redefinition
3359 // merges the new constant pool into the old, this is essentially the
3360 // same constant pool as the original. If constant pool merging is
3361 // no longer done in the future, this will have to change to save
3362 // the original.
3363 return InstanceKlass::cast(k)->constants();
3364 }
3365
3366 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3367 macro(_base_offset, k, "base", object_signature, false)
3368
3369 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3370 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3371 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3372 }
3373
3374 #if INCLUDE_CDS
3375 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3376 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3377 }
3378 #endif
3379
3380 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3381 Klass* k = SystemDictionary::box_klass(type);
3382 if (k == NULL) return NULL;
3383 InstanceKlass* ik = InstanceKlass::cast(k);
3384 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3385 return ik->allocate_instance(THREAD);
3386 }
3387
3388
3389 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3390 oop box = initialize_and_allocate(type, CHECK_0);
3391 if (box == NULL) return NULL;
3392 switch (type) {
3393 case T_BOOLEAN:
3394 box->bool_field_put(value_offset, value->z);
3395 break;
3396 case T_CHAR:
3397 box->char_field_put(value_offset, value->c);
3398 break;
3399 case T_FLOAT:
3400 box->float_field_put(value_offset, value->f);
3401 break;
3402 case T_DOUBLE:
3403 box->double_field_put(long_value_offset, value->d);
3404 break;
3405 case T_BYTE:
3406 box->byte_field_put(value_offset, value->b);
3407 break;
3408 case T_SHORT:
3409 box->short_field_put(value_offset, value->s);
3410 break;
3411 case T_INT:
3412 box->int_field_put(value_offset, value->i);
3413 break;
3414 case T_LONG:
3415 box->long_field_put(long_value_offset, value->j);
3416 break;
3417 default:
3418 return NULL;
3419 }
3420 return box;
3421 }
3422
3423
3424 BasicType java_lang_boxing_object::basic_type(oop box) {
3425 if (box == NULL) return T_ILLEGAL;
3426 BasicType type = SystemDictionary::box_klass_type(box->klass());
3427 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3428 return T_ILLEGAL;
3429 return type;
3430 }
3431
3432
3433 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3434 BasicType type = SystemDictionary::box_klass_type(box->klass());
3435 switch (type) {
3436 case T_BOOLEAN:
3437 value->z = box->bool_field(value_offset);
3438 break;
3439 case T_CHAR:
3440 value->c = box->char_field(value_offset);
3441 break;
3442 case T_FLOAT:
3443 value->f = box->float_field(value_offset);
3444 break;
3445 case T_DOUBLE:
3446 value->d = box->double_field(long_value_offset);
3447 break;
3448 case T_BYTE:
3449 value->b = box->byte_field(value_offset);
3450 break;
3451 case T_SHORT:
3452 value->s = box->short_field(value_offset);
3453 break;
3454 case T_INT:
3455 value->i = box->int_field(value_offset);
3456 break;
3457 case T_LONG:
3458 value->j = box->long_field(long_value_offset);
3459 break;
3460 default:
3461 return T_ILLEGAL;
3462 } // end switch
3463 return type;
3464 }
3465
3466
3467 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3468 BasicType type = SystemDictionary::box_klass_type(box->klass());
3469 switch (type) {
3470 case T_BOOLEAN:
3471 box->bool_field_put(value_offset, value->z);
3472 break;
3473 case T_CHAR:
3474 box->char_field_put(value_offset, value->c);
3475 break;
3476 case T_FLOAT:
3477 box->float_field_put(value_offset, value->f);
3478 break;
3479 case T_DOUBLE:
3480 box->double_field_put(long_value_offset, value->d);
3481 break;
3482 case T_BYTE:
3483 box->byte_field_put(value_offset, value->b);
3484 break;
3485 case T_SHORT:
3486 box->short_field_put(value_offset, value->s);
3487 break;
3488 case T_INT:
3489 box->int_field_put(value_offset, value->i);
3490 break;
3491 case T_LONG:
3492 box->long_field_put(long_value_offset, value->j);
3493 break;
3494 default:
3495 return T_ILLEGAL;
3496 } // end switch
3497 return type;
3498 }
3499
3500
3501 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3502 switch (type) {
3503 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3504 case T_CHAR: st->print("%d", value->c); break;
3505 case T_BYTE: st->print("%d", value->b); break;
3506 case T_SHORT: st->print("%d", value->s); break;
3507 case T_INT: st->print("%d", value->i); break;
3508 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3509 case T_FLOAT: st->print("%f", value->f); break;
3510 case T_DOUBLE: st->print("%lf", value->d); break;
3511 default: st->print("type %d?", type); break;
3512 }
3513 }
3514
3515 // Support for java_lang_ref_Reference
3516
3517 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3518 assert(obj != NULL, "sanity");
3519 if (offset != java_lang_ref_Reference::referent_offset) {
3520 return false;
3521 }
3522
3523 Klass* k = obj->klass();
3524 if (!k->is_instance_klass()) {
3525 return false;
3526 }
3527
3528 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3529 bool is_reference = ik->reference_type() != REF_NONE;
3530 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3531 return is_reference;
3532 }
3533
3534 // Support for java_lang_ref_SoftReference
3535 //
3536
3537 #define SOFTREFERENCE_FIELDS_DO(macro) \
3538 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3539 macro(static_clock_offset, k, "clock", long_signature, true)
3540
3541 void java_lang_ref_SoftReference::compute_offsets() {
3542 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3543 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3544 }
3545
3546 #if INCLUDE_CDS
3547 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3548 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3549 }
3550 #endif
3551
3552 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3553 return ref->long_field(timestamp_offset);
3554 }
3555
3556 jlong java_lang_ref_SoftReference::clock() {
3557 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3558 oop base = ik->static_field_base_raw();
3559 return base->long_field(static_clock_offset);
3560 }
3561
3562 void java_lang_ref_SoftReference::set_clock(jlong value) {
3563 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3564 oop base = ik->static_field_base_raw();
3565 base->long_field_put(static_clock_offset, value);
3566 }
3567
3568 // Support for java_lang_invoke_DirectMethodHandle
3569
3570 int java_lang_invoke_DirectMethodHandle::_member_offset;
3571
3572 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3573 oop member_name = NULL;
3574 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3575 "a DirectMethodHandle oop is expected");
3576 return dmh->obj_field(member_offset_in_bytes());
3577 }
3578
3579 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3580 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3581
3582 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3583 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3584 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3585 }
3586
3587 #if INCLUDE_CDS
3588 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3589 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3590 }
3591 #endif
3592
3593 // Support for java_lang_invoke_MethodHandle
3594
3595 int java_lang_invoke_MethodHandle::_type_offset;
3596 int java_lang_invoke_MethodHandle::_form_offset;
3597
3598 int java_lang_invoke_MemberName::_clazz_offset;
3599 int java_lang_invoke_MemberName::_name_offset;
3600 int java_lang_invoke_MemberName::_type_offset;
3601 int java_lang_invoke_MemberName::_flags_offset;
3602 int java_lang_invoke_MemberName::_method_offset;
3603 int java_lang_invoke_MemberName::_vmindex_offset;
3604
3605 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3606 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3607
3608 int java_lang_invoke_LambdaForm::_vmentry_offset;
3609
3610 #define METHODHANDLE_FIELDS_DO(macro) \
3611 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3612 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3613
3614 void java_lang_invoke_MethodHandle::compute_offsets() {
3615 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3616 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3617 }
3618
3619 #if INCLUDE_CDS
3620 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3621 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3622 }
3623 #endif
3624
3625 #define MEMBERNAME_FIELDS_DO(macro) \
3626 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3627 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3628 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3629 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3630 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3631
3632 void java_lang_invoke_MemberName::compute_offsets() {
3633 InstanceKlass* k = SystemDictionary::MemberName_klass();
3634 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3635 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3636 }
3637
3638 #if INCLUDE_CDS
3639 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3640 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3641 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3642 }
3643 #endif
3644
3645 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3646 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3647 assert(k != NULL, "jdk mismatch");
3648 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3649 }
3650
3651 #if INCLUDE_CDS
3652 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3653 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3654 }
3655 #endif
3656
3657 #define LAMBDAFORM_FIELDS_DO(macro) \
3658 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3659
3660 void java_lang_invoke_LambdaForm::compute_offsets() {
3661 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3662 assert (k != NULL, "jdk mismatch");
3663 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3664 }
3665
3666 #if INCLUDE_CDS
3667 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3668 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3669 }
3670 #endif
3671
3672 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3673 return obj != NULL && is_subclass(obj->klass());
3674 }
3675
3676
3677 oop java_lang_invoke_MethodHandle::type(oop mh) {
3678 return mh->obj_field(_type_offset);
3679 }
3680
3681 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3682 mh->obj_field_put(_type_offset, mtype);
3683 }
3684
3685 oop java_lang_invoke_MethodHandle::form(oop mh) {
3686 assert(_form_offset != 0, "");
3687 return mh->obj_field(_form_offset);
3688 }
3689
3690 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3691 assert(_form_offset != 0, "");
3692 mh->obj_field_put(_form_offset, lform);
3693 }
3694
3695 /// MemberName accessors
3696
3697 oop java_lang_invoke_MemberName::clazz(oop mname) {
3698 assert(is_instance(mname), "wrong type");
3699 return mname->obj_field(_clazz_offset);
3700 }
3701
3702 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3703 assert(is_instance(mname), "wrong type");
3704 mname->obj_field_put(_clazz_offset, clazz);
3705 }
3706
3707 oop java_lang_invoke_MemberName::name(oop mname) {
3708 assert(is_instance(mname), "wrong type");
3709 return mname->obj_field(_name_offset);
3710 }
3711
3712 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3713 assert(is_instance(mname), "wrong type");
3714 mname->obj_field_put(_name_offset, name);
3715 }
3716
3717 oop java_lang_invoke_MemberName::type(oop mname) {
3718 assert(is_instance(mname), "wrong type");
3719 return mname->obj_field(_type_offset);
3720 }
3721
3722 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3723 assert(is_instance(mname), "wrong type");
3724 mname->obj_field_put(_type_offset, type);
3725 }
3726
3727 int java_lang_invoke_MemberName::flags(oop mname) {
3728 assert(is_instance(mname), "wrong type");
3729 return mname->int_field(_flags_offset);
3730 }
3731
3732 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3733 assert(is_instance(mname), "wrong type");
3734 mname->int_field_put(_flags_offset, flags);
3735 }
3736
3737
3738 // Return vmtarget from ResolvedMethodName method field through indirection
3739 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3740 assert(is_instance(mname), "wrong type");
3741 oop method = mname->obj_field(_method_offset);
3742 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3743 }
3744
3745 bool java_lang_invoke_MemberName::is_method(oop mname) {
3746 assert(is_instance(mname), "must be MemberName");
3747 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3748 }
3749
3750 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3751 assert(is_instance(mname), "wrong type");
3752 mname->obj_field_put(_method_offset, resolved_method);
3753 }
3754
3755 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3756 assert(is_instance(mname), "wrong type");
3757 return (intptr_t) mname->address_field(_vmindex_offset);
3758 }
3759
3760 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3761 assert(is_instance(mname), "wrong type");
3762 mname->address_field_put(_vmindex_offset, (address) index);
3763 }
3764
3765
3766 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3767 assert(is_instance(resolved_method), "wrong type");
3768 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3769 assert(m->is_method(), "must be");
3770 return m;
3771 }
3772
3773 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3774 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3775 assert(is_instance(resolved_method), "wrong type");
3776 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3777 }
3778
3779 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3780 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3781 oop resolved_method = ResolvedMethodTable::find_method(m());
3782 if (resolved_method == NULL) {
3783 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3784 if (!k->is_initialized()) {
3785 k->initialize(CHECK_NULL);
3786 }
3787 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3788 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3789 // Add a reference to the loader (actually mirror because anonymous classes will not have
3790 // distinct loaders) to ensure the metadata is kept alive.
3791 // This mirror may be different than the one in clazz field.
3792 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3793 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method));
3794 }
3795 return resolved_method;
3796 }
3797
3798 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3799 assert(is_instance(lform), "wrong type");
3800 return lform->obj_field(_vmentry_offset);
3801 }
3802
3803
3804 // Support for java_lang_invoke_MethodType
3805
3806 int java_lang_invoke_MethodType::_rtype_offset;
3807 int java_lang_invoke_MethodType::_ptypes_offset;
3808
3809 #define METHODTYPE_FIELDS_DO(macro) \
3810 macro(_rtype_offset, k, "rtype", class_signature, false); \
3811 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3812
3813 void java_lang_invoke_MethodType::compute_offsets() {
3814 InstanceKlass* k = SystemDictionary::MethodType_klass();
3815 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3816 }
3817
3818 #if INCLUDE_CDS
3819 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3820 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3821 }
3822 #endif
3823
3824 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3825 st->print("(");
3826 objArrayOop pts = ptypes(mt);
3827 for (int i = 0, limit = pts->length(); i < limit; i++) {
3828 java_lang_Class::print_signature(pts->obj_at(i), st);
3829 }
3830 st->print(")");
3831 java_lang_Class::print_signature(rtype(mt), st);
3832 }
3833
3834 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3835 ResourceMark rm;
3836 stringStream buffer(128);
3837 print_signature(mt, &buffer);
3838 const char* sigstr = buffer.base();
3839 int siglen = (int) buffer.size();
3840 Symbol *name;
3841 if (!intern_if_not_found) {
3842 name = SymbolTable::probe(sigstr, siglen);
3843 } else {
3844 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3845 }
3846 return name;
3847 }
3848
3849 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3850 if (oopDesc::equals(mt1, mt2))
3851 return true;
3852 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3853 return false;
3854 if (ptype_count(mt1) != ptype_count(mt2))
3855 return false;
3856 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3857 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3858 return false;
3859 }
3860 return true;
3861 }
3862
3863 oop java_lang_invoke_MethodType::rtype(oop mt) {
3864 assert(is_instance(mt), "must be a MethodType");
3865 return mt->obj_field(_rtype_offset);
3866 }
3867
3868 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3869 assert(is_instance(mt), "must be a MethodType");
3870 return (objArrayOop) mt->obj_field(_ptypes_offset);
3871 }
3872
3873 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3874 return ptypes(mt)->obj_at(idx);
3875 }
3876
3877 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3878 return ptypes(mt)->length();
3879 }
3880
3881 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3882 objArrayOop pts = ptypes(mt);
3883 int count = pts->length();
3884 int slots = 0;
3885 for (int i = 0; i < count; i++) {
3886 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3887 slots += type2size[bt];
3888 }
3889 return slots;
3890 }
3891
3892 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3893 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3894 return type2size[bt];
3895 }
3896
3897
3898 // Support for java_lang_invoke_CallSite
3899
3900 int java_lang_invoke_CallSite::_target_offset;
3901 int java_lang_invoke_CallSite::_context_offset;
3902
3903 #define CALLSITE_FIELDS_DO(macro) \
3904 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3905 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3906
3907 void java_lang_invoke_CallSite::compute_offsets() {
3908 InstanceKlass* k = SystemDictionary::CallSite_klass();
3909 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3910 }
3911
3912 #if INCLUDE_CDS
3913 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3914 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3915 }
3916 #endif
3917
3918 oop java_lang_invoke_CallSite::context(oop call_site) {
3919 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3920
3921 oop dep_oop = call_site->obj_field(_context_offset);
3922 return dep_oop;
3923 }
3924
3925 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3926
3927 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3928
3929 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3930 InstanceKlass* k = SystemDictionary::Context_klass();
3931 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3932 }
3933
3934 #if INCLUDE_CDS
3935 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3936 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3937 }
3938 #endif
3939
3940 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3941 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3942 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset);
3943 DependencyContext dep_ctx(vmdeps_addr);
3944 return dep_ctx;
3945 }
3946
3947 // Support for java_security_AccessControlContext
3948
3949 int java_security_AccessControlContext::_context_offset = 0;
3950 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3951 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3952 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3953
3954 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3955 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3956 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3957 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3958 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3959
3960 void java_security_AccessControlContext::compute_offsets() {
3961 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3962 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3963 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3964 }
3965
3966 #if INCLUDE_CDS
3967 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3968 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3969 }
3970 #endif
3971
3972 bool java_security_AccessControlContext::is_authorized(Handle context) {
3973 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3974 assert(_isAuthorized_offset != -1, "should be set");
3975 return context->bool_field(_isAuthorized_offset) != 0;
3976 }
3977
3978 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3979 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3980 // Ensure klass is initialized
3981 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3982 // Allocate result
3983 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3984 // Fill in values
3985 result->obj_field_put(_context_offset, context());
3986 result->obj_field_put(_privilegedContext_offset, privileged_context());
3987 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3988 // whitelist AccessControlContexts created by the JVM if present
3989 if (_isAuthorized_offset != -1) {
3990 result->bool_field_put(_isAuthorized_offset, true);
3991 }
3992 return result;
3993 }
3994
3995
3996 // Support for java_lang_ClassLoader
3997
3998 bool java_lang_ClassLoader::offsets_computed = false;
3999 int java_lang_ClassLoader::_loader_data_offset = -1;
4000 int java_lang_ClassLoader::parallelCapable_offset = -1;
4001 int java_lang_ClassLoader::name_offset = -1;
4002 int java_lang_ClassLoader::nameAndId_offset = -1;
4003 int java_lang_ClassLoader::unnamedModule_offset = -1;
4004
4005 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4006 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
4007 return HeapAccess<>::load_at(loader, _loader_data_offset);
4008 }
4009
4010 ClassLoaderData* java_lang_ClassLoader::cmpxchg_loader_data(ClassLoaderData* new_data, oop loader, ClassLoaderData* expected_data) {
4011 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
4012 return HeapAccess<>::atomic_cmpxchg_at(new_data, loader, _loader_data_offset, expected_data);
4013 }
4014
4015 #define CLASSLOADER_FIELDS_DO(macro) \
4016 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4017 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4018 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
4019 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4020 macro(parent_offset, k1, "parent", classloader_signature, false)
4021
4022 void java_lang_ClassLoader::compute_offsets() {
4023 assert(!offsets_computed, "offsets should be initialized only once");
4024 offsets_computed = true;
4025
4026 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
4027 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4028
4029 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4030 }
4031
4032 #if INCLUDE_CDS
4033 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4034 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4035 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4036 }
4037 #endif
4038
4039 oop java_lang_ClassLoader::parent(oop loader) {
4040 assert(is_instance(loader), "loader must be oop");
4041 return loader->obj_field(parent_offset);
4042 }
4043
4044 // Returns the name field of this class loader. If the name field has not
4045 // been set, null will be returned.
4046 oop java_lang_ClassLoader::name(oop loader) {
4047 assert(is_instance(loader), "loader must be oop");
4048 return loader->obj_field(name_offset);
4049 }
4050
4051 // Returns the nameAndId field of this class loader. The format is
4052 // as follows:
4053 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4054 // If the defining loader has no name then <qualified-class-name> @<id>
4055 // If built-in loader, then omit '@<id>' as there is only one instance.
4056 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4057 oop java_lang_ClassLoader::nameAndId(oop loader) {
4058 assert(is_instance(loader), "loader must be oop");
4059 return loader->obj_field(nameAndId_offset);
4060 }
4061
4062 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4063 assert(is_instance(loader), "loader must be oop");
4064 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4065 oop acl = loader;
4066 debug_only(jint loop_count = 0);
4067 // This loop taken verbatim from ClassLoader.java:
4068 do {
4069 acl = parent(acl);
4070 if (oopDesc::equals(cl, acl)) {
4071 return true;
4072 }
4073 assert(++loop_count > 0, "loop_count overflow");
4074 } while (acl != NULL);
4075 return false;
4076 }
4077
4078 bool java_lang_ClassLoader::is_instance(oop obj) {
4079 return obj != NULL && is_subclass(obj->klass());
4080 }
4081
4082
4083 // For class loader classes, parallelCapable defined
4084 // based on non-null field
4085 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4086 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4087 if (parallelCapable_offset == -1) {
4088 // Default for backward compatibility is false
4089 return false;
4090 }
4091 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4092 }
4093
4094 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4095 // Fix for 4474172; see evaluation for more details
4096 loader = non_reflection_class_loader(loader);
4097
4098 oop cl = SystemDictionary::java_system_loader();
4099 while(cl != NULL) {
4100 if (oopDesc::equals(cl, loader)) return true;
4101 cl = parent(cl);
4102 }
4103 return false;
4104 }
4105
4106 // Return true if this is one of the class loaders associated with
4107 // the generated bytecodes for reflection.
4108 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4109 if (loader != NULL) {
4110 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4111 // This might be null in non-1.4 JDKs
4112 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4113 }
4114 return false;
4115 }
4116
4117 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4118 // See whether this is one of the class loaders associated with
4119 // the generated bytecodes for reflection, and if so, "magically"
4120 // delegate to its parent to prevent class loading from occurring
4121 // in places where applications using reflection didn't expect it.
4122 if (is_reflection_class_loader(loader)) {
4123 return parent(loader);
4124 }
4125 return loader;
4126 }
4127
4128 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4129 assert(is_instance(loader), "loader must be oop");
4130 return loader->obj_field(unnamedModule_offset);
4131 }
4132
4133 // Support for java_lang_System
4134 //
4135 #define SYSTEM_FIELDS_DO(macro) \
4136 macro(static_in_offset, k, "in", input_stream_signature, true); \
4137 macro(static_out_offset, k, "out", print_stream_signature, true); \
4138 macro(static_err_offset, k, "err", print_stream_signature, true); \
4139 macro(static_security_offset, k, "security", security_manager_signature, true)
4140
4141 void java_lang_System::compute_offsets() {
4142 InstanceKlass* k = SystemDictionary::System_klass();
4143 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4144 }
4145
4146 #if INCLUDE_CDS
4147 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4148 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4149 }
4150 #endif
4151
4152 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4153 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4154 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4155
4156
4157 bool java_lang_System::has_security_manager() {
4158 InstanceKlass* ik = SystemDictionary::System_klass();
4159 oop base = ik->static_field_base_raw();
4160 return base->obj_field(static_security_offset) != NULL;
4161 }
4162
4163 int java_lang_Class::_klass_offset;
4164 int java_lang_Class::_array_klass_offset;
4165 int java_lang_Class::_oop_size_offset;
4166 int java_lang_Class::_static_oop_field_count_offset;
4167 int java_lang_Class::_class_loader_offset;
4168 int java_lang_Class::_module_offset;
4169 int java_lang_Class::_protection_domain_offset;
4170 int java_lang_Class::_component_mirror_offset;
4171 int java_lang_Class::_init_lock_offset;
4172 int java_lang_Class::_signers_offset;
4173 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4174 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4175 int java_lang_Throwable::backtrace_offset;
4176 int java_lang_Throwable::detailMessage_offset;
4177 int java_lang_Throwable::stackTrace_offset;
4178 int java_lang_Throwable::depth_offset;
4179 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4180 int java_lang_reflect_AccessibleObject::override_offset;
4181 int java_lang_reflect_Method::clazz_offset;
4182 int java_lang_reflect_Method::name_offset;
4183 int java_lang_reflect_Method::returnType_offset;
4184 int java_lang_reflect_Method::parameterTypes_offset;
4185 int java_lang_reflect_Method::exceptionTypes_offset;
4186 int java_lang_reflect_Method::slot_offset;
4187 int java_lang_reflect_Method::modifiers_offset;
4188 int java_lang_reflect_Method::signature_offset;
4189 int java_lang_reflect_Method::annotations_offset;
4190 int java_lang_reflect_Method::parameter_annotations_offset;
4191 int java_lang_reflect_Method::annotation_default_offset;
4192 int java_lang_reflect_Method::type_annotations_offset;
4193 int java_lang_reflect_Constructor::clazz_offset;
4194 int java_lang_reflect_Constructor::parameterTypes_offset;
4195 int java_lang_reflect_Constructor::exceptionTypes_offset;
4196 int java_lang_reflect_Constructor::slot_offset;
4197 int java_lang_reflect_Constructor::modifiers_offset;
4198 int java_lang_reflect_Constructor::signature_offset;
4199 int java_lang_reflect_Constructor::annotations_offset;
4200 int java_lang_reflect_Constructor::parameter_annotations_offset;
4201 int java_lang_reflect_Constructor::type_annotations_offset;
4202 int java_lang_reflect_Field::clazz_offset;
4203 int java_lang_reflect_Field::name_offset;
4204 int java_lang_reflect_Field::type_offset;
4205 int java_lang_reflect_Field::slot_offset;
4206 int java_lang_reflect_Field::modifiers_offset;
4207 int java_lang_reflect_Field::signature_offset;
4208 int java_lang_reflect_Field::annotations_offset;
4209 int java_lang_reflect_Field::type_annotations_offset;
4210 int java_lang_reflect_Parameter::name_offset;
4211 int java_lang_reflect_Parameter::modifiers_offset;
4212 int java_lang_reflect_Parameter::index_offset;
4213 int java_lang_reflect_Parameter::executable_offset;
4214 int java_lang_boxing_object::value_offset;
4215 int java_lang_boxing_object::long_value_offset;
4216 int java_lang_ref_Reference::referent_offset;
4217 int java_lang_ref_Reference::queue_offset;
4218 int java_lang_ref_Reference::next_offset;
4219 int java_lang_ref_Reference::discovered_offset;
4220 int java_lang_ref_SoftReference::timestamp_offset;
4221 int java_lang_ref_SoftReference::static_clock_offset;
4222 int java_lang_ClassLoader::parent_offset;
4223 int java_lang_System::static_in_offset;
4224 int java_lang_System::static_out_offset;
4225 int java_lang_System::static_err_offset;
4226 int java_lang_System::static_security_offset;
4227 int java_lang_StackTraceElement::methodName_offset;
4228 int java_lang_StackTraceElement::fileName_offset;
4229 int java_lang_StackTraceElement::lineNumber_offset;
4230 int java_lang_StackTraceElement::moduleName_offset;
4231 int java_lang_StackTraceElement::moduleVersion_offset;
4232 int java_lang_StackTraceElement::classLoaderName_offset;
4233 int java_lang_StackTraceElement::declaringClass_offset;
4234 int java_lang_StackTraceElement::declaringClassObject_offset;
4235 int java_lang_StackFrameInfo::_memberName_offset;
4236 int java_lang_StackFrameInfo::_bci_offset;
4237 int java_lang_StackFrameInfo::_version_offset;
4238 int java_lang_LiveStackFrameInfo::_monitors_offset;
4239 int java_lang_LiveStackFrameInfo::_locals_offset;
4240 int java_lang_LiveStackFrameInfo::_operands_offset;
4241 int java_lang_LiveStackFrameInfo::_mode_offset;
4242 int java_lang_AssertionStatusDirectives::classes_offset;
4243 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4244 int java_lang_AssertionStatusDirectives::packages_offset;
4245 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4246 int java_lang_AssertionStatusDirectives::deflt_offset;
4247 int java_nio_Buffer::_limit_offset;
4248 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4249 int reflect_ConstantPool::_oop_offset;
4250 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4251
4252
4253 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4254 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4255 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4256 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4257 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4258 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4259 macro(methodName_offset, k, "methodName", string_signature, false); \
4260 macro(fileName_offset, k, "fileName", string_signature, false); \
4261 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4262
4263 // Support for java_lang_StackTraceElement
4264 void java_lang_StackTraceElement::compute_offsets() {
4265 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4266 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4267 }
4268
4269 #if INCLUDE_CDS
4270 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4271 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4272 }
4273 #endif
4274
4275 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4276 element->obj_field_put(fileName_offset, value);
4277 }
4278
4279 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4280 element->obj_field_put(declaringClass_offset, value);
4281 }
4282
4283 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4284 element->obj_field_put(methodName_offset, value);
4285 }
4286
4287 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4288 element->int_field_put(lineNumber_offset, value);
4289 }
4290
4291 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4292 element->obj_field_put(moduleName_offset, value);
4293 }
4294
4295 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4296 element->obj_field_put(moduleVersion_offset, value);
4297 }
4298
4299 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4300 element->obj_field_put(classLoaderName_offset, value);
4301 }
4302
4303 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4304 element->obj_field_put(declaringClassObject_offset, value);
4305 }
4306
4307 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4308 element->short_field_put(_version_offset, value);
4309 }
4310
4311 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4312 element->int_field_put(_bci_offset, value);
4313 }
4314
4315 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4316 element->obj_field_put(_monitors_offset, value);
4317 }
4318
4319 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4320 element->obj_field_put(_locals_offset, value);
4321 }
4322
4323 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4324 element->obj_field_put(_operands_offset, value);
4325 }
4326
4327 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4328 element->int_field_put(_mode_offset, value);
4329 }
4330
4331 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4332 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4333 macro(classes_offset, k, "classes", string_array_signature, false); \
4334 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4335 macro(packages_offset, k, "packages", string_array_signature, false); \
4336 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4337 macro(deflt_offset, k, "deflt", bool_signature, false)
4338
4339 void java_lang_AssertionStatusDirectives::compute_offsets() {
4340 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4341 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4342 }
4343
4344 #if INCLUDE_CDS
4345 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4346 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4347 }
4348 #endif
4349
4350 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4351 o->obj_field_put(classes_offset, val);
4352 }
4353
4354 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4355 o->obj_field_put(classEnabled_offset, val);
4356 }
4357
4358 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4359 o->obj_field_put(packages_offset, val);
4360 }
4361
4362 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4363 o->obj_field_put(packageEnabled_offset, val);
4364 }
4365
4366 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4367 o->bool_field_put(deflt_offset, val);
4368 }
4369
4370
4371 // Support for intrinsification of java.nio.Buffer.checkIndex
4372 int java_nio_Buffer::limit_offset() {
4373 return _limit_offset;
4374 }
4375
4376 #define BUFFER_FIELDS_DO(macro) \
4377 macro(_limit_offset, k, "limit", int_signature, false)
4378
4379 void java_nio_Buffer::compute_offsets() {
4380 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4381 assert(k != NULL, "must be loaded in 1.4+");
4382 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4383 }
4384
4385 #if INCLUDE_CDS
4386 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4387 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4388 }
4389 #endif
4390
4391 #define AOS_FIELDS_DO(macro) \
4392 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4393
4394 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4395 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4396 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4397 }
4398
4399 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4400 assert(_owner_offset != 0, "Must be initialized");
4401 return obj->obj_field(_owner_offset);
4402 }
4403
4404 #if INCLUDE_CDS
4405 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4406 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4407 }
4408 #endif
4409
4410 static int member_offset(int hardcoded_offset) {
4411 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4412 }
4413
4414 // Compute hard-coded offsets
4415 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4416 // are not available to determine the offset_of_static_fields.
4417 void JavaClasses::compute_hard_coded_offsets() {
4418
4419 // java_lang_boxing_object
4420 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4421 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4422
4423 // java_lang_ref_Reference
4424 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4425 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4426 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4427 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4428 }
4429
4430 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4431
4432 // Compute non-hard-coded field offsets of all the classes in this file
4433 void JavaClasses::compute_offsets() {
4434 if (UseSharedSpaces) {
4435 return; // field offsets are loaded from archive
4436 }
4437
4438 // We have already called the compute_offsets() of the
4439 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4440 // earlier inside SystemDictionary::resolve_preloaded_classes()
4441 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4442
4443 // generated interpreter code wants to know about the offsets we just computed:
4444 AbstractAssembler::update_delayed_values();
4445 }
4446
4447 #if INCLUDE_CDS
4448 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4449
4450 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4451 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4452 }
4453 #endif
4454
4455
4456 #ifndef PRODUCT
4457
4458 // These functions exist to assert the validity of hard-coded field offsets to guard
4459 // against changes in the class files
4460
4461 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4462 EXCEPTION_MARK;
4463 fieldDescriptor fd;
4464 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4465 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4466 InstanceKlass* ik = InstanceKlass::cast(k);
4467 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4468 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4469 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4470 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4471 return false;
4472 }
4473 if (fd.is_static()) {
4474 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4475 return false;
4476 }
4477 if (fd.offset() == hardcoded_offset ) {
4478 return true;
4479 } else {
4480 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4481 klass_name, field_name, hardcoded_offset, fd.offset());
4482 return false;
4483 }
4484 }
4485
4486 // Check the hard-coded field offsets of all the classes in this file
4487
4488 void JavaClasses::check_offsets() {
4489 bool valid = true;
4490
4491 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4492 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4493
4494 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4495 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4496
4497 // Boxed primitive objects (java_lang_boxing_object)
4498
4499 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4500 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4501 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4502 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4503 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4504 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4505 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4506 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4507
4508 // java.lang.ref.Reference
4509
4510 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4511 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4512 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4513 // Fake field
4514 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4515
4516 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4517 }
4518
4519 #endif // PRODUCT
4520
4521 int InjectedField::compute_offset() {
4522 InstanceKlass* ik = InstanceKlass::cast(klass());
4523 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4524 if (!may_be_java && !fs.access_flags().is_internal()) {
4525 // Only look at injected fields
4526 continue;
4527 }
4528 if (fs.name() == name() && fs.signature() == signature()) {
4529 return fs.offset();
4530 }
4531 }
4532 ResourceMark rm;
4533 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)" : "");
4534 #ifndef PRODUCT
4535 ik->print();
4536 tty->print_cr("all fields:");
4537 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4538 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4539 }
4540 #endif //PRODUCT
4541 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
4542 return -1;
4543 }
4544
4545 void javaClasses_init() {
4546 JavaClasses::compute_offsets();
4547 JavaClasses::check_offsets();
4548 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4549 }