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.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(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 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1042 assert(ak != NULL || t == T_VOID, "should not be NULL");
1043 if (ak != NULL) {
1044 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1045 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1046 }
1047
1048 // Clear the fields. Just to be safe
1049 Klass *k = m->klass();
1050 Handle archived_mirror_h(THREAD, archived_m);
1051 ResetMirrorField reset(archived_mirror_h);
1052 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1053
1054 log_trace(cds, mirror)("Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1055 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1056
1057 Universe::_mirrors[t] = archived_m;
1058 }
1059 }
1060
1061 assert(Universe::_mirrors[T_INT] != NULL &&
1062 Universe::_mirrors[T_FLOAT] != NULL &&
1063 Universe::_mirrors[T_DOUBLE] != NULL &&
1064 Universe::_mirrors[T_BYTE] != NULL &&
1065 Universe::_mirrors[T_BOOLEAN] != NULL &&
1066 Universe::_mirrors[T_CHAR] != NULL &&
1067 Universe::_mirrors[T_LONG] != NULL &&
1068 Universe::_mirrors[T_SHORT] != NULL &&
1069 Universe::_mirrors[T_VOID] != NULL, "sanity");
1070
1071 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1072 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1073 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1074 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1075 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1076 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1077 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1078 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1079 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1080 }
1081
1082 //
1083 // After the mirror object is successfully archived, the archived
1084 // klass is set with _has_archived_raw_mirror flag.
1085 //
1086 // The _has_archived_raw_mirror flag is cleared at runtime when the
1087 // archived mirror is restored. If archived java heap data cannot
1088 // be used at runtime, new mirror object is created for the shared
1089 // class. The _has_archived_raw_mirror is cleared also during the process.
1090 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1091 assert(MetaspaceShared::is_heap_object_archiving_allowed(),
1092 "MetaspaceShared::is_heap_object_archiving_allowed() must be true");
1093
1094 // Mirror is already archived
1095 if (k->has_raw_archived_mirror()) {
1096 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1097 return k->archived_java_mirror_raw();
1098 }
1099
1100 // No mirror
1101 oop mirror = k->java_mirror();
1102 if (mirror == NULL) {
1103 return NULL;
1104 }
1105
1106 if (k->is_instance_klass()) {
1107 InstanceKlass *ik = InstanceKlass::cast(k);
1108 assert(ik->signers() == NULL && !k->has_signer_and_not_archived(),
1109 "class with signer cannot be supported");
1110
1111 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1112 ik->is_shared_app_class())) {
1113 // Archiving mirror for classes from non-builtin loaders is not
1114 // supported. Clear the _java_mirror within the archived class.
1115 k->set_java_mirror_handle(NULL);
1116 return NULL;
1117 }
1118 }
1119
1120 // Now start archiving the mirror object
1121 oop archived_mirror = MetaspaceShared::archive_heap_object(mirror, THREAD);
1122 if (archived_mirror == NULL) {
1123 return NULL;
1124 }
1125
1126 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1127 if (archived_mirror == NULL) {
1128 return NULL;
1129 }
1130
1131 k->set_archived_java_mirror_raw(archived_mirror);
1132
1133 k->set_has_raw_archived_mirror();
1134
1135 ResourceMark rm;
1136 log_trace(cds, mirror)("Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1137 k->external_name(), p2i(mirror), p2i(archived_mirror));
1138
1139 return archived_mirror;
1140 }
1141
1142 // The process is based on create_mirror().
1143 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1144 oop archived_mirror,
1145 Thread *THREAD) {
1146 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1147 // to archived metadata and objects below.
1148 Klass *c = archived_mirror->klass();
1149 Handle archived_mirror_h(THREAD, archived_mirror);
1150 ResetMirrorField reset(archived_mirror_h);
1151 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1152
1153 if (k->is_array_klass()) {
1154 oop archived_comp_mirror;
1155 if (k->is_typeArray_klass()) {
1156 // The primitive type mirrors are already archived. Get the archived mirror.
1157 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1158 archived_comp_mirror = MetaspaceShared::find_archived_heap_object(comp_mirror);
1159 assert(archived_comp_mirror != NULL, "Must be");
1160 } else {
1161 assert(k->is_objArray_klass(), "Must be");
1162 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1163 assert(element_klass != NULL, "Must have an element klass");
1164 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1165 if (archived_comp_mirror == NULL) {
1166 return NULL;
1167 }
1168 }
1169 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1170 } else {
1171 assert(k->is_instance_klass(), "Must be");
1172
1173 // Reset local static fields in the mirror
1174 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1175
1176 java_lang_Class:set_init_lock(archived_mirror, NULL);
1177
1178 set_protection_domain(archived_mirror, NULL);
1179 }
1180
1181 // clear class loader and mirror_module_field
1182 set_class_loader(archived_mirror, NULL);
1183 set_module(archived_mirror, NULL);
1184
1185 // The archived mirror's field at _klass_offset is still pointing to the original
1186 // klass. Updated the field in the archived mirror to point to the relocated
1187 // klass in the archive.
1188 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1189 log_debug(cds, mirror)("Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1190 p2i(as_Klass(mirror)), p2i(reloc_k));
1191 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1192
1193 // The field at _array_klass_offset is pointing to the original one dimension
1194 // higher array klass if exists. Relocate the pointer.
1195 Klass *arr = array_klass_acquire(mirror);
1196 if (arr != NULL) {
1197 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1198 log_debug(cds, mirror)("Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1199 p2i(arr), p2i(reloc_arr));
1200 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1201 }
1202 return archived_mirror;
1203 }
1204
1205 // Returns true if the mirror is updated, false if no archived mirror
1206 // data is present. After the archived mirror object is restored, the
1207 // shared klass' _has_raw_archived_mirror flag is cleared.
1208 bool java_lang_Class::restore_archived_mirror(Klass *k,
1209 Handle class_loader, Handle module,
1210 Handle protection_domain, TRAPS) {
1211 oop m = MetaspaceShared::materialize_archived_object(k->archived_java_mirror_raw());
1212
1213 if (m == NULL) {
1214 return false;
1215 }
1216
1217 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1218
1219 // mirror is archived, restore
1220 assert(MetaspaceShared::is_archive_object(m), "must be archived mirror object");
1221 Handle mirror(THREAD, m);
1222
1223 // The java.lang.Class field offsets were archived and reloaded from archive.
1224 // No need to put classes on the fixup_mirror_list before java.lang.Class
1225 // is loaded.
1226
1227 if (!k->is_array_klass()) {
1228 // - local static final fields with initial values were initialized at dump time
1229
1230 // create the init_lock
1231 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1232 set_init_lock(mirror(), r);
1233
1234 if (protection_domain.not_null()) {
1235 set_protection_domain(mirror(), protection_domain());
1236 }
1237 }
1238
1239 assert(class_loader() == k->class_loader(), "should be same");
1240 if (class_loader.not_null()) {
1241 set_class_loader(mirror(), class_loader());
1242 }
1243
1244 k->set_java_mirror(mirror);
1245 k->clear_has_raw_archived_mirror();
1246
1247 set_mirror_module_field(k, mirror, module, THREAD);
1248
1249 ResourceMark rm;
1250 log_trace(cds, mirror)("Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1251
1252 return true;
1253 }
1254 #endif // INCLUDE_CDS_JAVA_HEAP
1255
1256 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1257 assert(_module_offset != 0, "must have been computed already");
1258 java_lang_Class::set_module(k->java_mirror(), module());
1259 }
1260
1261 int java_lang_Class::oop_size(oop java_class) {
1262 assert(_oop_size_offset != 0, "must be set");
1263 int size = java_class->int_field(_oop_size_offset);
1264 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1265 return size;
1266 }
1267
1268 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1269 assert(_oop_size_offset != 0, "must be set");
1270 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1271 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1272 }
1273
1274 int java_lang_Class::static_oop_field_count(oop java_class) {
1275 assert(_static_oop_field_count_offset != 0, "must be set");
1276 return java_class->int_field(_static_oop_field_count_offset);
1277 }
1278 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1279 assert(_static_oop_field_count_offset != 0, "must be set");
1280 java_class->int_field_put(_static_oop_field_count_offset, size);
1281 }
1282
1283 oop java_lang_Class::protection_domain(oop java_class) {
1284 assert(_protection_domain_offset != 0, "must be set");
1285 return java_class->obj_field(_protection_domain_offset);
1286 }
1287 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1288 assert(_protection_domain_offset != 0, "must be set");
1289 java_class->obj_field_put(_protection_domain_offset, pd);
1290 }
1291
1292 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1293 assert(_component_mirror_offset != 0, "must be set");
1294 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1295 }
1296 oop java_lang_Class::component_mirror(oop java_class) {
1297 assert(_component_mirror_offset != 0, "must be set");
1298 return java_class->obj_field(_component_mirror_offset);
1299 }
1300
1301 oop java_lang_Class::init_lock(oop java_class) {
1302 assert(_init_lock_offset != 0, "must be set");
1303 return java_class->obj_field(_init_lock_offset);
1304 }
1305 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1306 assert(_init_lock_offset != 0, "must be set");
1307 java_class->obj_field_put(_init_lock_offset, init_lock);
1308 }
1309
1310 objArrayOop java_lang_Class::signers(oop java_class) {
1311 assert(_signers_offset != 0, "must be set");
1312 return (objArrayOop)java_class->obj_field(_signers_offset);
1313 }
1314 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1315 assert(_signers_offset != 0, "must be set");
1316 java_class->obj_field_put(_signers_offset, (oop)signers);
1317 }
1318
1319
1320 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1321 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1322 if (_class_loader_offset != 0) {
1323 java_class->obj_field_put(_class_loader_offset, loader);
1324 }
1325 }
1326
1327 oop java_lang_Class::class_loader(oop java_class) {
1328 assert(_class_loader_offset != 0, "must be set");
1329 return java_class->obj_field(_class_loader_offset);
1330 }
1331
1332 oop java_lang_Class::module(oop java_class) {
1333 assert(_module_offset != 0, "must be set");
1334 return java_class->obj_field(_module_offset);
1335 }
1336
1337 void java_lang_Class::set_module(oop java_class, oop module) {
1338 assert(_module_offset != 0, "must be set");
1339 java_class->obj_field_put(_module_offset, module);
1340 }
1341
1342 oop java_lang_Class::name(Handle java_class, TRAPS) {
1343 assert(_name_offset != 0, "must be set");
1344 oop o = java_class->obj_field(_name_offset);
1345 if (o == NULL) {
1346 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1347 java_class->obj_field_put(_name_offset, o);
1348 }
1349 return o;
1350 }
1351
1352 oop java_lang_Class::source_file(oop java_class) {
1353 assert(_source_file_offset != 0, "must be set");
1354 return java_class->obj_field(_source_file_offset);
1355 }
1356
1357 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1358 assert(_source_file_offset != 0, "must be set");
1359 java_class->obj_field_put(_source_file_offset, source_file);
1360 }
1361
1362 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1363 // This should be improved by adding a field at the Java level or by
1364 // introducing a new VM klass (see comment in ClassFileParser)
1365 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1366 if (type != T_VOID) {
1367 Klass* aklass = Universe::typeArrayKlassObj(type);
1368 assert(aklass != NULL, "correct bootstrap");
1369 release_set_array_klass(java_class, aklass);
1370 }
1371 #ifdef ASSERT
1372 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1373 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1374 #endif
1375 return java_class;
1376 }
1377
1378
1379 Klass* java_lang_Class::as_Klass(oop java_class) {
1380 //%note memory_2
1381 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1382 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1383 assert(k == NULL || k->is_klass(), "type check");
1384 return k;
1385 }
1386
1387
1388 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1389 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1390 java_class->metadata_field_put(_klass_offset, klass);
1391 }
1392
1393
1394 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1395 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1396 Symbol* name = NULL;
1397 bool is_instance = false;
1398 if (is_primitive(java_class)) {
1399 name = vmSymbols::type_signature(primitive_type(java_class));
1400 } else {
1401 Klass* k = as_Klass(java_class);
1402 is_instance = k->is_instance_klass();
1403 name = k->name();
1404 }
1405 if (name == NULL) {
1406 st->print("<null>");
1407 return;
1408 }
1409 if (is_instance) st->print("L");
1410 st->write((char*) name->base(), (int) name->utf8_length());
1411 if (is_instance) st->print(";");
1412 }
1413
1414 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1415 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1416 Symbol* name;
1417 if (is_primitive(java_class)) {
1418 name = vmSymbols::type_signature(primitive_type(java_class));
1419 // Because this can create a new symbol, the caller has to decrement
1420 // the refcount, so make adjustment here and below for symbols returned
1421 // that are not created or incremented due to a successful lookup.
1422 name->increment_refcount();
1423 } else {
1424 Klass* k = as_Klass(java_class);
1425 if (!k->is_instance_klass()) {
1426 name = k->name();
1427 name->increment_refcount();
1428 } else {
1429 ResourceMark rm;
1430 const char* sigstr = k->signature_name();
1431 int siglen = (int) strlen(sigstr);
1432 if (!intern_if_not_found) {
1433 name = SymbolTable::probe(sigstr, siglen);
1434 } else {
1435 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1436 }
1437 }
1438 }
1439 return name;
1440 }
1441
1442 // Returns the Java name for this Java mirror (Resource allocated)
1443 // See Klass::external_name().
1444 // For primitive type Java mirrors, its type name is returned.
1445 const char* java_lang_Class::as_external_name(oop java_class) {
1446 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1447 const char* name = NULL;
1448 if (is_primitive(java_class)) {
1449 name = type2name(primitive_type(java_class));
1450 } else {
1451 name = as_Klass(java_class)->external_name();
1452 }
1453 if (name == NULL) {
1454 name = "<null>";
1455 }
1456 return name;
1457 }
1458
1459 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1460 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1461 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1462 return k;
1463 }
1464
1465
1466 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1467 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1468 java_class->release_metadata_field_put(_array_klass_offset, klass);
1469 }
1470
1471
1472 bool java_lang_Class::is_primitive(oop java_class) {
1473 // should assert:
1474 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1475 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1476
1477 #ifdef ASSERT
1478 if (is_primitive) {
1479 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1480 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1481 "Should be either the T_VOID primitive or a java primitive");
1482 }
1483 #endif
1484
1485 return is_primitive;
1486 }
1487
1488
1489 BasicType java_lang_Class::primitive_type(oop java_class) {
1490 assert(java_lang_Class::is_primitive(java_class), "just checking");
1491 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1492 BasicType type = T_VOID;
1493 if (ak != NULL) {
1494 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1495 type = ArrayKlass::cast(ak)->element_type();
1496 } else {
1497 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1498 }
1499 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1500 return type;
1501 }
1502
1503 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1504 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1505 if (is_primitive(java_class)) {
1506 if (reference_klass != NULL)
1507 (*reference_klass) = NULL;
1508 return primitive_type(java_class);
1509 } else {
1510 if (reference_klass != NULL)
1511 (*reference_klass) = as_Klass(java_class);
1512 return T_OBJECT;
1513 }
1514 }
1515
1516
1517 oop java_lang_Class::primitive_mirror(BasicType t) {
1518 oop mirror = Universe::java_mirror(t);
1519 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1520 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1521 return mirror;
1522 }
1523
1524 bool java_lang_Class::offsets_computed = false;
1525 int java_lang_Class::classRedefinedCount_offset = -1;
1526
1527 #define CLASS_FIELDS_DO(macro) \
1528 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1529 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1530 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1531 macro(_module_offset, k, "module", module_signature, false); \
1532 macro(_name_offset, k, "name", string_signature, false); \
1533
1534 void java_lang_Class::compute_offsets() {
1535 if (offsets_computed) {
1536 return;
1537 }
1538
1539 offsets_computed = true;
1540
1541 InstanceKlass* k = SystemDictionary::Class_klass();
1542 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1543
1544 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1545 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1546 // GC treats them the same.
1547 _init_lock_offset = _component_mirror_offset;
1548
1549 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1550 }
1551
1552 #if INCLUDE_CDS
1553 void java_lang_Class::serialize(SerializeClosure* f) {
1554 f->do_u4((u4*)&offsets_computed);
1555 f->do_u4((u4*)&_init_lock_offset);
1556
1557 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1558
1559 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1560 }
1561 #endif
1562
1563 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1564 if (classRedefinedCount_offset == -1) {
1565 // If we don't have an offset for it then just return -1 as a marker.
1566 return -1;
1567 }
1568
1569 return the_class_mirror->int_field(classRedefinedCount_offset);
1570 }
1571
1572 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1573 if (classRedefinedCount_offset == -1) {
1574 // If we don't have an offset for it then nothing to set.
1575 return;
1576 }
1577
1578 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1579 }
1580
1581
1582 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1583 // platform thread structure, and a eetop offset which was used for thread
1584 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1585 // merged, so in the HotSpot VM we just use the eetop field for the thread
1586 // instead of the privateInfo_offset.
1587 //
1588 // Note: The stackSize field is only present starting in 1.4.
1589
1590 int java_lang_Thread::_name_offset = 0;
1591 int java_lang_Thread::_group_offset = 0;
1592 int java_lang_Thread::_contextClassLoader_offset = 0;
1593 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1594 int java_lang_Thread::_priority_offset = 0;
1595 int java_lang_Thread::_eetop_offset = 0;
1596 int java_lang_Thread::_daemon_offset = 0;
1597 int java_lang_Thread::_stillborn_offset = 0;
1598 int java_lang_Thread::_stackSize_offset = 0;
1599 int java_lang_Thread::_tid_offset = 0;
1600 int java_lang_Thread::_thread_status_offset = 0;
1601 int java_lang_Thread::_park_blocker_offset = 0;
1602 int java_lang_Thread::_park_event_offset = 0 ;
1603
1604 #define THREAD_FIELDS_DO(macro) \
1605 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1606 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1607 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1608 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1609 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1610 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1611 macro(_eetop_offset, k, "eetop", long_signature, false); \
1612 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1613 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1614 macro(_tid_offset, k, "tid", long_signature, false); \
1615 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1616 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1617 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1618
1619 void java_lang_Thread::compute_offsets() {
1620 assert(_group_offset == 0, "offsets should be initialized only once");
1621
1622 InstanceKlass* k = SystemDictionary::Thread_klass();
1623 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1624 }
1625
1626 #if INCLUDE_CDS
1627 void java_lang_Thread::serialize(SerializeClosure* f) {
1628 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1629 }
1630 #endif
1631
1632 JavaThread* java_lang_Thread::thread(oop java_thread) {
1633 return (JavaThread*)java_thread->address_field(_eetop_offset);
1634 }
1635
1636
1637 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1638 java_thread->address_field_put(_eetop_offset, (address)thread);
1639 }
1640
1641
1642 oop java_lang_Thread::name(oop java_thread) {
1643 return java_thread->obj_field(_name_offset);
1644 }
1645
1646
1647 void java_lang_Thread::set_name(oop java_thread, oop name) {
1648 java_thread->obj_field_put(_name_offset, name);
1649 }
1650
1651
1652 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1653 return (ThreadPriority)java_thread->int_field(_priority_offset);
1654 }
1655
1656
1657 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1658 java_thread->int_field_put(_priority_offset, priority);
1659 }
1660
1661
1662 oop java_lang_Thread::threadGroup(oop java_thread) {
1663 return java_thread->obj_field(_group_offset);
1664 }
1665
1666
1667 bool java_lang_Thread::is_stillborn(oop java_thread) {
1668 return java_thread->bool_field(_stillborn_offset) != 0;
1669 }
1670
1671
1672 // We never have reason to turn the stillborn bit off
1673 void java_lang_Thread::set_stillborn(oop java_thread) {
1674 java_thread->bool_field_put(_stillborn_offset, true);
1675 }
1676
1677
1678 bool java_lang_Thread::is_alive(oop java_thread) {
1679 JavaThread* thr = java_lang_Thread::thread(java_thread);
1680 return (thr != NULL);
1681 }
1682
1683
1684 bool java_lang_Thread::is_daemon(oop java_thread) {
1685 return java_thread->bool_field(_daemon_offset) != 0;
1686 }
1687
1688
1689 void java_lang_Thread::set_daemon(oop java_thread) {
1690 java_thread->bool_field_put(_daemon_offset, true);
1691 }
1692
1693 oop java_lang_Thread::context_class_loader(oop java_thread) {
1694 return java_thread->obj_field(_contextClassLoader_offset);
1695 }
1696
1697 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1698 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1699 }
1700
1701
1702 jlong java_lang_Thread::stackSize(oop java_thread) {
1703 if (_stackSize_offset > 0) {
1704 return java_thread->long_field(_stackSize_offset);
1705 } else {
1706 return 0;
1707 }
1708 }
1709
1710 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1711 void java_lang_Thread::set_thread_status(oop java_thread,
1712 java_lang_Thread::ThreadStatus status) {
1713 // The threadStatus is only present starting in 1.5
1714 if (_thread_status_offset > 0) {
1715 java_thread->int_field_put(_thread_status_offset, status);
1716 }
1717 }
1718
1719 // Read thread status value from threadStatus field in java.lang.Thread java class.
1720 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1721 // Make sure the caller is operating on behalf of the VM or is
1722 // running VM code (state == _thread_in_vm).
1723 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1724 JavaThread::current()->thread_state() == _thread_in_vm,
1725 "Java Thread is not running in vm");
1726 // The threadStatus is only present starting in 1.5
1727 if (_thread_status_offset > 0) {
1728 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1729 } else {
1730 // All we can easily figure out is if it is alive, but that is
1731 // enough info for a valid unknown status.
1732 // These aren't restricted to valid set ThreadStatus values, so
1733 // use JVMTI values and cast.
1734 JavaThread* thr = java_lang_Thread::thread(java_thread);
1735 if (thr == NULL) {
1736 // the thread hasn't run yet or is in the process of exiting
1737 return NEW;
1738 }
1739 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1740 }
1741 }
1742
1743
1744 jlong java_lang_Thread::thread_id(oop java_thread) {
1745 // The thread ID field is only present starting in 1.5
1746 if (_tid_offset > 0) {
1747 return java_thread->long_field(_tid_offset);
1748 } else {
1749 return 0;
1750 }
1751 }
1752
1753 oop java_lang_Thread::park_blocker(oop java_thread) {
1754 assert(JDK_Version::current().supports_thread_park_blocker() &&
1755 _park_blocker_offset != 0, "Must support parkBlocker field");
1756
1757 if (_park_blocker_offset > 0) {
1758 return java_thread->obj_field(_park_blocker_offset);
1759 }
1760
1761 return NULL;
1762 }
1763
1764 jlong java_lang_Thread::park_event(oop java_thread) {
1765 if (_park_event_offset > 0) {
1766 return java_thread->long_field(_park_event_offset);
1767 }
1768 return 0;
1769 }
1770
1771 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1772 if (_park_event_offset > 0) {
1773 java_thread->long_field_put(_park_event_offset, ptr);
1774 return true;
1775 }
1776 return false;
1777 }
1778
1779
1780 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1781 assert(_thread_status_offset != 0, "Must have thread status");
1782 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1783 switch (status) {
1784 case NEW : return "NEW";
1785 case RUNNABLE : return "RUNNABLE";
1786 case SLEEPING : return "TIMED_WAITING (sleeping)";
1787 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1788 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1789 case PARKED : return "WAITING (parking)";
1790 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1791 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1792 case TERMINATED : return "TERMINATED";
1793 default : return "UNKNOWN";
1794 };
1795 }
1796 int java_lang_ThreadGroup::_parent_offset = 0;
1797 int java_lang_ThreadGroup::_name_offset = 0;
1798 int java_lang_ThreadGroup::_threads_offset = 0;
1799 int java_lang_ThreadGroup::_groups_offset = 0;
1800 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1801 int java_lang_ThreadGroup::_destroyed_offset = 0;
1802 int java_lang_ThreadGroup::_daemon_offset = 0;
1803 int java_lang_ThreadGroup::_nthreads_offset = 0;
1804 int java_lang_ThreadGroup::_ngroups_offset = 0;
1805
1806 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1807 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1808 return java_thread_group->obj_field(_parent_offset);
1809 }
1810
1811 // ("name as oop" accessor is not necessary)
1812
1813 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1814 oop name = java_thread_group->obj_field(_name_offset);
1815 // ThreadGroup.name can be null
1816 if (name != NULL) {
1817 return java_lang_String::as_utf8_string(name);
1818 }
1819 return NULL;
1820 }
1821
1822 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1823 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1824 return java_thread_group->int_field(_nthreads_offset);
1825 }
1826
1827 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1828 oop threads = java_thread_group->obj_field(_threads_offset);
1829 assert(threads != NULL, "threadgroups should have threads");
1830 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1831 return objArrayOop(threads);
1832 }
1833
1834 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1835 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1836 return java_thread_group->int_field(_ngroups_offset);
1837 }
1838
1839 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1840 oop groups = java_thread_group->obj_field(_groups_offset);
1841 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1842 return objArrayOop(groups);
1843 }
1844
1845 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1846 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1847 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1848 }
1849
1850 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1851 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1852 return java_thread_group->bool_field(_destroyed_offset) != 0;
1853 }
1854
1855 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1856 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1857 return java_thread_group->bool_field(_daemon_offset) != 0;
1858 }
1859
1860 #define THREADGROUP_FIELDS_DO(macro) \
1861 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1862 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1863 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1864 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1865 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1866 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1867 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1868 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1869 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1870
1871 void java_lang_ThreadGroup::compute_offsets() {
1872 assert(_parent_offset == 0, "offsets should be initialized only once");
1873
1874 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1875 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1876 }
1877
1878 #if INCLUDE_CDS
1879 void java_lang_ThreadGroup::serialize(SerializeClosure* f) {
1880 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1881 }
1882 #endif
1883
1884 #define THROWABLE_FIELDS_DO(macro) \
1885 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1886 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1887 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1888 macro(depth_offset, k, "depth", int_signature, false); \
1889 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1890
1891 void java_lang_Throwable::compute_offsets() {
1892 InstanceKlass* k = SystemDictionary::Throwable_klass();
1893 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1894 }
1895
1896 #if INCLUDE_CDS
1897 void java_lang_Throwable::serialize(SerializeClosure* f) {
1898 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1899 }
1900 #endif
1901
1902 oop java_lang_Throwable::unassigned_stacktrace() {
1903 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1904 oop base = ik->static_field_base_raw();
1905 return base->obj_field(static_unassigned_stacktrace_offset);
1906 }
1907
1908 oop java_lang_Throwable::backtrace(oop throwable) {
1909 return throwable->obj_field_acquire(backtrace_offset);
1910 }
1911
1912
1913 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1914 throwable->release_obj_field_put(backtrace_offset, value);
1915 }
1916
1917 int java_lang_Throwable::depth(oop throwable) {
1918 return throwable->int_field(depth_offset);
1919 }
1920
1921 void java_lang_Throwable::set_depth(oop throwable, int value) {
1922 throwable->int_field_put(depth_offset, value);
1923 }
1924
1925 oop java_lang_Throwable::message(oop throwable) {
1926 return throwable->obj_field(detailMessage_offset);
1927 }
1928
1929
1930 // Return Symbol for detailed_message or NULL
1931 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1932 PRESERVE_EXCEPTION_MARK; // Keep original exception
1933 oop detailed_message = java_lang_Throwable::message(throwable);
1934 if (detailed_message != NULL) {
1935 return java_lang_String::as_symbol(detailed_message, THREAD);
1936 }
1937 return NULL;
1938 }
1939
1940 void java_lang_Throwable::set_message(oop throwable, oop value) {
1941 throwable->obj_field_put(detailMessage_offset, value);
1942 }
1943
1944
1945 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1946 throwable->obj_field_put(stackTrace_offset, st_element_array);
1947 }
1948
1949 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1950 set_stacktrace(throwable, NULL);
1951 }
1952
1953
1954 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1955 ResourceMark rm;
1956 Klass* k = throwable->klass();
1957 assert(k != NULL, "just checking");
1958 st->print("%s", k->external_name());
1959 oop msg = message(throwable);
1960 if (msg != NULL) {
1961 st->print(": %s", java_lang_String::as_utf8_string(msg));
1962 }
1963 }
1964
1965 // After this many redefines, the stack trace is unreliable.
1966 const int MAX_VERSION = USHRT_MAX;
1967
1968 static inline bool version_matches(Method* method, int version) {
1969 assert(version < MAX_VERSION, "version is too big");
1970 return method != NULL && (method->constants()->version() == version);
1971 }
1972
1973
1974 // This class provides a simple wrapper over the internal structure of
1975 // exception backtrace to insulate users of the backtrace from needing
1976 // to know what it looks like.
1977 class BacktraceBuilder: public StackObj {
1978 friend class BacktraceIterator;
1979 private:
1980 Handle _backtrace;
1981 objArrayOop _head;
1982 typeArrayOop _methods;
1983 typeArrayOop _bcis;
1984 objArrayOop _mirrors;
1985 typeArrayOop _names; // needed to insulate method name against redefinition
1986 int _index;
1987 NoSafepointVerifier _nsv;
1988
1989 enum {
1990 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1991 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1992 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1993 trace_names_offset = java_lang_Throwable::trace_names_offset,
1994 trace_next_offset = java_lang_Throwable::trace_next_offset,
1995 trace_size = java_lang_Throwable::trace_size,
1996 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1997 };
1998
1999 // get info out of chunks
2000 static typeArrayOop get_methods(objArrayHandle chunk) {
2001 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2002 assert(methods != NULL, "method array should be initialized in backtrace");
2003 return methods;
2004 }
2005 static typeArrayOop get_bcis(objArrayHandle chunk) {
2006 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2007 assert(bcis != NULL, "bci array should be initialized in backtrace");
2008 return bcis;
2009 }
2010 static objArrayOop get_mirrors(objArrayHandle chunk) {
2011 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2012 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2013 return mirrors;
2014 }
2015 static typeArrayOop get_names(objArrayHandle chunk) {
2016 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2017 assert(names != NULL, "names array should be initialized in backtrace");
2018 return names;
2019 }
2020
2021 public:
2022
2023 // constructor for new backtrace
2024 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) {
2025 expand(CHECK);
2026 _backtrace = Handle(THREAD, _head);
2027 _index = 0;
2028 }
2029
2030 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2031 _methods = get_methods(backtrace);
2032 _bcis = get_bcis(backtrace);
2033 _mirrors = get_mirrors(backtrace);
2034 _names = get_names(backtrace);
2035 assert(_methods->length() == _bcis->length() &&
2036 _methods->length() == _mirrors->length() &&
2037 _mirrors->length() == _names->length(),
2038 "method and source information arrays should match");
2039
2040 // head is the preallocated backtrace
2041 _head = backtrace();
2042 _backtrace = Handle(thread, _head);
2043 _index = 0;
2044 }
2045
2046 void expand(TRAPS) {
2047 objArrayHandle old_head(THREAD, _head);
2048 PauseNoSafepointVerifier pnsv(&_nsv);
2049
2050 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2051 objArrayHandle new_head(THREAD, head);
2052
2053 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2054 typeArrayHandle new_methods(THREAD, methods);
2055
2056 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2057 typeArrayHandle new_bcis(THREAD, bcis);
2058
2059 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2060 objArrayHandle new_mirrors(THREAD, mirrors);
2061
2062 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2063 typeArrayHandle new_names(THREAD, names);
2064
2065 if (!old_head.is_null()) {
2066 old_head->obj_at_put(trace_next_offset, new_head());
2067 }
2068 new_head->obj_at_put(trace_methods_offset, new_methods());
2069 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2070 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2071 new_head->obj_at_put(trace_names_offset, new_names());
2072
2073 _head = new_head();
2074 _methods = new_methods();
2075 _bcis = new_bcis();
2076 _mirrors = new_mirrors();
2077 _names = new_names();
2078 _index = 0;
2079 }
2080
2081 oop backtrace() {
2082 return _backtrace();
2083 }
2084
2085 inline void push(Method* method, int bci, TRAPS) {
2086 // Smear the -1 bci to 0 since the array only holds unsigned
2087 // shorts. The later line number lookup would just smear the -1
2088 // to a 0 even if it could be recorded.
2089 if (bci == SynchronizationEntryBCI) bci = 0;
2090
2091 if (_index >= trace_chunk_size) {
2092 methodHandle mhandle(THREAD, method);
2093 expand(CHECK);
2094 method = mhandle();
2095 }
2096
2097 _methods->ushort_at_put(_index, method->orig_method_idnum());
2098 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2099
2100 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2101 // klass owning the symbols alive so their refcounts aren't decremented.
2102 Symbol* name = method->name();
2103 _names->symbol_at_put(_index, name);
2104
2105 // We need to save the mirrors in the backtrace to keep the class
2106 // from being unloaded while we still have this stack trace.
2107 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2108 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2109 _index++;
2110 }
2111
2112 };
2113
2114 struct BacktraceElement : public StackObj {
2115 int _method_id;
2116 int _bci;
2117 int _version;
2118 Symbol* _name;
2119 Handle _mirror;
2120 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2121 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {}
2122 };
2123
2124 class BacktraceIterator : public StackObj {
2125 int _index;
2126 objArrayHandle _result;
2127 objArrayHandle _mirrors;
2128 typeArrayHandle _methods;
2129 typeArrayHandle _bcis;
2130 typeArrayHandle _names;
2131
2132 void init(objArrayHandle result, Thread* thread) {
2133 // Get method id, bci, version and mirror from chunk
2134 _result = result;
2135 if (_result.not_null()) {
2136 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2137 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2138 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2139 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2140 _index = 0;
2141 }
2142 }
2143 public:
2144 BacktraceIterator(objArrayHandle result, Thread* thread) {
2145 init(result, thread);
2146 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2147 }
2148
2149 BacktraceElement next(Thread* thread) {
2150 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2151 _methods->ushort_at(_index),
2152 Backtrace::version_at(_bcis->int_at(_index)),
2153 Backtrace::bci_at(_bcis->int_at(_index)),
2154 _names->symbol_at(_index));
2155 _index++;
2156
2157 if (_index >= java_lang_Throwable::trace_chunk_size) {
2158 int next_offset = java_lang_Throwable::trace_next_offset;
2159 // Get next chunk
2160 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2161 init(result, thread);
2162 }
2163 return e;
2164 }
2165
2166 bool repeat() {
2167 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2168 }
2169 };
2170
2171
2172 // Print stack trace element to resource allocated buffer
2173 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2174 int version, int bci, Symbol* name) {
2175 ResourceMark rm;
2176
2177 // Get strings and string lengths
2178 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2179 const char* klass_name = holder->external_name();
2180 int buf_len = (int)strlen(klass_name);
2181
2182 char* method_name = name->as_C_string();
2183 buf_len += (int)strlen(method_name);
2184
2185 char* source_file_name = NULL;
2186 Symbol* source = Backtrace::get_source_file_name(holder, version);
2187 if (source != NULL) {
2188 source_file_name = source->as_C_string();
2189 buf_len += (int)strlen(source_file_name);
2190 }
2191
2192 char *module_name = NULL, *module_version = NULL;
2193 ModuleEntry* module = holder->module();
2194 if (module->is_named()) {
2195 module_name = module->name()->as_C_string();
2196 buf_len += (int)strlen(module_name);
2197 if (module->version() != NULL) {
2198 module_version = module->version()->as_C_string();
2199 buf_len += (int)strlen(module_version);
2200 }
2201 }
2202
2203 // Allocate temporary buffer with extra space for formatting and line number
2204 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2205
2206 // Print stack trace line in buffer
2207 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2208
2209 // Print module information
2210 if (module_name != NULL) {
2211 if (module_version != NULL) {
2212 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2213 } else {
2214 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2215 }
2216 }
2217
2218 // The method can be NULL if the requested class version is gone
2219 Method* method = holder->method_with_orig_idnum(method_id, version);
2220 if (!version_matches(method, version)) {
2221 strcat(buf, "Redefined)");
2222 } else {
2223 int line_number = Backtrace::get_line_number(method, bci);
2224 if (line_number == -2) {
2225 strcat(buf, "Native Method)");
2226 } else {
2227 if (source_file_name != NULL && (line_number != -1)) {
2228 // Sourcename and linenumber
2229 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2230 } else if (source_file_name != NULL) {
2231 // Just sourcename
2232 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2233 } else {
2234 // Neither sourcename nor linenumber
2235 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2236 }
2237 CompiledMethod* nm = method->code();
2238 if (WizardMode && nm != NULL) {
2239 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2240 }
2241 }
2242 }
2243
2244 st->print_cr("%s", buf);
2245 }
2246
2247 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2248 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2249 int method_id = method->orig_method_idnum();
2250 int version = method->constants()->version();
2251 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2252 }
2253
2254 /**
2255 * Print the throwable message and its stack trace plus all causes by walking the
2256 * cause chain. The output looks the same as of Throwable.printStackTrace().
2257 */
2258 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2259 // First, print the message.
2260 print(throwable(), st);
2261 st->cr();
2262
2263 // Now print the stack trace.
2264 Thread* THREAD = Thread::current();
2265 while (throwable.not_null()) {
2266 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2267 if (result.is_null()) {
2268 st->print_raw_cr("\t<<no stack trace available>>");
2269 return;
2270 }
2271 BacktraceIterator iter(result, THREAD);
2272
2273 while (iter.repeat()) {
2274 BacktraceElement bte = iter.next(THREAD);
2275 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2276 }
2277 {
2278 // Call getCause() which doesn't necessarily return the _cause field.
2279 EXCEPTION_MARK;
2280 JavaValue cause(T_OBJECT);
2281 JavaCalls::call_virtual(&cause,
2282 throwable,
2283 throwable->klass(),
2284 vmSymbols::getCause_name(),
2285 vmSymbols::void_throwable_signature(),
2286 THREAD);
2287 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2288 if (HAS_PENDING_EXCEPTION) {
2289 CLEAR_PENDING_EXCEPTION;
2290 throwable = Handle();
2291 } else {
2292 throwable = Handle(THREAD, (oop) cause.get_jobject());
2293 if (throwable.not_null()) {
2294 st->print("Caused by: ");
2295 print(throwable(), st);
2296 st->cr();
2297 }
2298 }
2299 }
2300 }
2301 }
2302
2303 /**
2304 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2305 */
2306 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2307 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2308 JavaValue result(T_VOID);
2309 JavaCalls::call_virtual(&result,
2310 throwable,
2311 SystemDictionary::Throwable_klass(),
2312 vmSymbols::printStackTrace_name(),
2313 vmSymbols::void_method_signature(),
2314 THREAD);
2315 }
2316
2317 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2318 if (!StackTraceInThrowable) return;
2319 ResourceMark rm(THREAD);
2320
2321 // Start out by clearing the backtrace for this object, in case the VM
2322 // runs out of memory while allocating the stack trace
2323 set_backtrace(throwable(), NULL);
2324 // Clear lazily constructed Java level stacktrace if refilling occurs
2325 // This is unnecessary in 1.7+ but harmless
2326 clear_stacktrace(throwable());
2327
2328 int max_depth = MaxJavaStackTraceDepth;
2329 JavaThread* thread = (JavaThread*)THREAD;
2330
2331 BacktraceBuilder bt(CHECK);
2332
2333 // If there is no Java frame just return the method that was being called
2334 // with bci 0
2335 if (!thread->has_last_Java_frame()) {
2336 if (max_depth >= 1 && method() != NULL) {
2337 bt.push(method(), 0, CHECK);
2338 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2339 set_depth(throwable(), 1);
2340 set_backtrace(throwable(), bt.backtrace());
2341 }
2342 return;
2343 }
2344
2345 // Instead of using vframe directly, this version of fill_in_stack_trace
2346 // basically handles everything by hand. This significantly improved the
2347 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2348 // See bug 6333838 for more details.
2349 // The "ASSERT" here is to verify this method generates the exactly same stack
2350 // trace as utilizing vframe.
2351 #ifdef ASSERT
2352 vframeStream st(thread);
2353 methodHandle st_method(THREAD, st.method());
2354 #endif
2355 int total_count = 0;
2356 RegisterMap map(thread, false);
2357 int decode_offset = 0;
2358 CompiledMethod* nm = NULL;
2359 bool skip_fillInStackTrace_check = false;
2360 bool skip_throwableInit_check = false;
2361 bool skip_hidden = !ShowHiddenFrames;
2362
2363 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2364 Method* method = NULL;
2365 int bci = 0;
2366
2367 // Compiled java method case.
2368 if (decode_offset != 0) {
2369 DebugInfoReadStream stream(nm, decode_offset);
2370 decode_offset = stream.read_int();
2371 method = (Method*)nm->metadata_at(stream.read_int());
2372 bci = stream.read_bci();
2373 } else {
2374 if (fr.is_first_frame()) break;
2375 address pc = fr.pc();
2376 if (fr.is_interpreted_frame()) {
2377 address bcp = fr.interpreter_frame_bcp();
2378 method = fr.interpreter_frame_method();
2379 bci = method->bci_from(bcp);
2380 fr = fr.sender(&map);
2381 } else {
2382 CodeBlob* cb = fr.cb();
2383 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2384 // but non nmethod
2385 fr = fr.sender(&map);
2386 if (cb == NULL || !cb->is_compiled()) {
2387 continue;
2388 }
2389 nm = cb->as_compiled_method();
2390 if (nm->method()->is_native()) {
2391 method = nm->method();
2392 bci = 0;
2393 } else {
2394 PcDesc* pd = nm->pc_desc_at(pc);
2395 decode_offset = pd->scope_decode_offset();
2396 // if decode_offset is not equal to 0, it will execute the
2397 // "compiled java method case" at the beginning of the loop.
2398 continue;
2399 }
2400 }
2401 }
2402 #ifdef ASSERT
2403 assert(st_method() == method && st.bci() == bci,
2404 "Wrong stack trace");
2405 st.next();
2406 // vframeStream::method isn't GC-safe so store off a copy
2407 // of the Method* in case we GC.
2408 if (!st.at_end()) {
2409 st_method = st.method();
2410 }
2411 #endif
2412
2413 // the format of the stacktrace will be:
2414 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2415 // - 0 or more <init> methods for the exception class (skipped)
2416 // - rest of the stack
2417
2418 if (!skip_fillInStackTrace_check) {
2419 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2420 throwable->is_a(method->method_holder())) {
2421 continue;
2422 }
2423 else {
2424 skip_fillInStackTrace_check = true; // gone past them all
2425 }
2426 }
2427 if (!skip_throwableInit_check) {
2428 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2429
2430 // skip <init> methods of the exception class and superclasses
2431 // This is simlar to classic VM.
2432 if (method->name() == vmSymbols::object_initializer_name() &&
2433 throwable->is_a(method->method_holder())) {
2434 continue;
2435 } else {
2436 // there are none or we've seen them all - either way stop checking
2437 skip_throwableInit_check = true;
2438 }
2439 }
2440 if (method->is_hidden()) {
2441 if (skip_hidden) continue;
2442 }
2443 bt.push(method, bci, CHECK);
2444 total_count++;
2445 }
2446
2447 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2448
2449 // Put completed stack trace into throwable object
2450 set_backtrace(throwable(), bt.backtrace());
2451 set_depth(throwable(), total_count);
2452 }
2453
2454 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2455 // No-op if stack trace is disabled
2456 if (!StackTraceInThrowable) {
2457 return;
2458 }
2459
2460 // Disable stack traces for some preallocated out of memory errors
2461 if (!Universe::should_fill_in_stack_trace(throwable)) {
2462 return;
2463 }
2464
2465 PRESERVE_EXCEPTION_MARK;
2466
2467 JavaThread* thread = JavaThread::active();
2468 fill_in_stack_trace(throwable, method, thread);
2469 // ignore exceptions thrown during stack trace filling
2470 CLEAR_PENDING_EXCEPTION;
2471 }
2472
2473 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2474 // Allocate stack trace - backtrace is created but not filled in
2475
2476 // No-op if stack trace is disabled
2477 if (!StackTraceInThrowable) return;
2478 BacktraceBuilder bt(CHECK); // creates a backtrace
2479 set_backtrace(throwable(), bt.backtrace());
2480 }
2481
2482
2483 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2484 // Fill in stack trace into preallocated backtrace (no GC)
2485
2486 // No-op if stack trace is disabled
2487 if (!StackTraceInThrowable) return;
2488
2489 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2490
2491 JavaThread* THREAD = JavaThread::current();
2492
2493 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2494 assert(backtrace.not_null(), "backtrace should have been preallocated");
2495
2496 ResourceMark rm(THREAD);
2497 vframeStream st(THREAD);
2498
2499 BacktraceBuilder bt(THREAD, backtrace);
2500
2501 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2502 // methods as preallocated errors aren't created by "java" code.
2503
2504 // fill in as much stack trace as possible
2505 int chunk_count = 0;
2506 for (;!st.at_end(); st.next()) {
2507 bt.push(st.method(), st.bci(), CHECK);
2508 chunk_count++;
2509
2510 // Bail-out for deep stacks
2511 if (chunk_count >= trace_chunk_size) break;
2512 }
2513 set_depth(throwable(), chunk_count);
2514 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2515
2516 // We support the Throwable immutability protocol defined for Java 7.
2517 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2518 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2519 }
2520
2521 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2522 objArrayHandle stack_trace_array_h, TRAPS) {
2523
2524 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2525 THROW(vmSymbols::java_lang_NullPointerException());
2526 }
2527
2528 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2529
2530 if (stack_trace_array_h->length() != depth(throwable())) {
2531 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2532 }
2533
2534 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2535 BacktraceIterator iter(result, THREAD);
2536
2537 int index = 0;
2538 while (iter.repeat()) {
2539 BacktraceElement bte = iter.next(THREAD);
2540
2541 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2542
2543 if (stack_trace_element.is_null()) {
2544 THROW(vmSymbols::java_lang_NullPointerException());
2545 }
2546
2547 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2548 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2549
2550 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2551 method,
2552 bte._version,
2553 bte._bci,
2554 bte._name, CHECK);
2555 }
2556 }
2557
2558 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2559 // Allocate java.lang.StackTraceElement instance
2560 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2561 assert(k != NULL, "must be loaded in 1.4+");
2562 if (k->should_be_initialized()) {
2563 k->initialize(CHECK_0);
2564 }
2565
2566 Handle element = k->allocate_instance_handle(CHECK_0);
2567
2568 int version = method->constants()->version();
2569 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2570 return element();
2571 }
2572
2573 void java_lang_StackTraceElement::fill_in(Handle element,
2574 InstanceKlass* holder, const methodHandle& method,
2575 int version, int bci, Symbol* name, TRAPS) {
2576 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2577
2578 ResourceMark rm(THREAD);
2579 HandleMark hm(THREAD);
2580
2581 // Fill in class name
2582 Handle java_class(THREAD, holder->java_mirror());
2583 oop classname = java_lang_Class::name(java_class, CHECK);
2584 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2585 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2586
2587 oop loader = holder->class_loader();
2588 if (loader != NULL) {
2589 oop loader_name = java_lang_ClassLoader::name(loader);
2590 if (loader_name != NULL)
2591 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2592 }
2593
2594 // Fill in method name
2595 oop methodname = StringTable::intern(name, CHECK);
2596 java_lang_StackTraceElement::set_methodName(element(), methodname);
2597
2598 // Fill in module name and version
2599 ModuleEntry* module = holder->module();
2600 if (module->is_named()) {
2601 oop module_name = StringTable::intern(module->name(), CHECK);
2602 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2603 oop module_version;
2604 if (module->version() != NULL) {
2605 module_version = StringTable::intern(module->version(), CHECK);
2606 } else {
2607 module_version = NULL;
2608 }
2609 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2610 }
2611
2612 if (method() == NULL || !version_matches(method(), version)) {
2613 // The method was redefined, accurate line number information isn't available
2614 java_lang_StackTraceElement::set_fileName(element(), NULL);
2615 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2616 } else {
2617 // Fill in source file name and line number.
2618 Symbol* source = Backtrace::get_source_file_name(holder, version);
2619 oop source_file = java_lang_Class::source_file(java_class());
2620 if (source != NULL) {
2621 // Class was not redefined. We can trust its cache if set,
2622 // else we have to initialize it.
2623 if (source_file == NULL) {
2624 source_file = StringTable::intern(source, CHECK);
2625 java_lang_Class::set_source_file(java_class(), source_file);
2626 }
2627 } else {
2628 // Class was redefined. Dump the cache if it was set.
2629 if (source_file != NULL) {
2630 source_file = NULL;
2631 java_lang_Class::set_source_file(java_class(), source_file);
2632 }
2633 if (ShowHiddenFrames) {
2634 source = vmSymbols::unknown_class_name();
2635 source_file = StringTable::intern(source, CHECK);
2636 }
2637 }
2638 java_lang_StackTraceElement::set_fileName(element(), source_file);
2639
2640 int line_number = Backtrace::get_line_number(method, bci);
2641 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2642 }
2643 }
2644
2645 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2646 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2647 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2648 // we should expand MemberName::name when Throwable uses StackTrace
2649 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2650 return method;
2651 }
2652
2653 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2654 // set Method* or mid/cpref
2655 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2656 InstanceKlass* ik = method->method_holder();
2657 CallInfo info(method(), ik, CHECK);
2658 MethodHandles::init_method_MemberName(mname, info);
2659 // set bci
2660 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2661 // method may be redefined; store the version
2662 int version = method->constants()->version();
2663 assert((jushort)version == version, "version should be short");
2664 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2665 }
2666
2667 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2668 ResourceMark rm(THREAD);
2669 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2670 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2671 InstanceKlass* holder = InstanceKlass::cast(clazz);
2672 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2673
2674 short version = stackFrame->short_field(_version_offset);
2675 short bci = stackFrame->short_field(_bci_offset);
2676 Symbol* name = method->name();
2677 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2678 }
2679
2680 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2681 macro(_memberName_offset, k, "memberName", object_signature, false); \
2682 macro(_bci_offset, k, "bci", short_signature, false)
2683
2684 void java_lang_StackFrameInfo::compute_offsets() {
2685 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2686 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2687 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2688 }
2689
2690 #if INCLUDE_CDS
2691 void java_lang_StackFrameInfo::serialize(SerializeClosure* f) {
2692 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2693 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2694 }
2695 #endif
2696
2697 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2698 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2699 macro(_locals_offset, k, "locals", object_array_signature, false); \
2700 macro(_operands_offset, k, "operands", object_array_signature, false); \
2701 macro(_mode_offset, k, "mode", int_signature, false)
2702
2703 void java_lang_LiveStackFrameInfo::compute_offsets() {
2704 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2705 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2706 }
2707
2708 #if INCLUDE_CDS
2709 void java_lang_LiveStackFrameInfo::serialize(SerializeClosure* f) {
2710 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2711 }
2712 #endif
2713
2714 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2715 macro(override_offset, k, "override", bool_signature, false)
2716
2717 void java_lang_reflect_AccessibleObject::compute_offsets() {
2718 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2719 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2720 }
2721
2722 #if INCLUDE_CDS
2723 void java_lang_reflect_AccessibleObject::serialize(SerializeClosure* f) {
2724 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2725 }
2726 #endif
2727
2728 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2729 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2730 return (jboolean) reflect->bool_field(override_offset);
2731 }
2732
2733 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2734 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2735 reflect->bool_field_put(override_offset, (int) value);
2736 }
2737
2738 #define METHOD_FIELDS_DO(macro) \
2739 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2740 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2741 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2742 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2743 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2744 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2745 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2746 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \
2747 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \
2748 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \
2749 macro##_OPTIONAL(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature); \
2750 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature)
2751
2752 void java_lang_reflect_Method::compute_offsets() {
2753 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2754 // The generic signature and annotations fields are only present in 1.5
2755 signature_offset = -1;
2756 annotations_offset = -1;
2757 parameter_annotations_offset = -1;
2758 annotation_default_offset = -1;
2759 type_annotations_offset = -1;
2760 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2761 }
2762
2763 #if INCLUDE_CDS
2764 void java_lang_reflect_Method::serialize(SerializeClosure* f) {
2765 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2766 }
2767 #endif
2768
2769 Handle java_lang_reflect_Method::create(TRAPS) {
2770 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2771 Klass* klass = SystemDictionary::reflect_Method_klass();
2772 // This class is eagerly initialized during VM initialization, since we keep a refence
2773 // to one of the methods
2774 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2775 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2776 }
2777
2778 oop java_lang_reflect_Method::clazz(oop reflect) {
2779 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2780 return reflect->obj_field(clazz_offset);
2781 }
2782
2783 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2784 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2785 reflect->obj_field_put(clazz_offset, value);
2786 }
2787
2788 int java_lang_reflect_Method::slot(oop reflect) {
2789 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2790 return reflect->int_field(slot_offset);
2791 }
2792
2793 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2795 reflect->int_field_put(slot_offset, value);
2796 }
2797
2798 oop java_lang_reflect_Method::name(oop method) {
2799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2800 return method->obj_field(name_offset);
2801 }
2802
2803 void java_lang_reflect_Method::set_name(oop method, oop value) {
2804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2805 method->obj_field_put(name_offset, value);
2806 }
2807
2808 oop java_lang_reflect_Method::return_type(oop method) {
2809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2810 return method->obj_field(returnType_offset);
2811 }
2812
2813 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2814 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2815 method->obj_field_put(returnType_offset, value);
2816 }
2817
2818 oop java_lang_reflect_Method::parameter_types(oop method) {
2819 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2820 return method->obj_field(parameterTypes_offset);
2821 }
2822
2823 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2824 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2825 method->obj_field_put(parameterTypes_offset, value);
2826 }
2827
2828 oop java_lang_reflect_Method::exception_types(oop method) {
2829 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2830 return method->obj_field(exceptionTypes_offset);
2831 }
2832
2833 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2834 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2835 method->obj_field_put(exceptionTypes_offset, value);
2836 }
2837
2838 int java_lang_reflect_Method::modifiers(oop method) {
2839 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2840 return method->int_field(modifiers_offset);
2841 }
2842
2843 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2844 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2845 method->int_field_put(modifiers_offset, value);
2846 }
2847
2848 bool java_lang_reflect_Method::has_signature_field() {
2849 return (signature_offset >= 0);
2850 }
2851
2852 oop java_lang_reflect_Method::signature(oop method) {
2853 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2854 assert(has_signature_field(), "signature field must be present");
2855 return method->obj_field(signature_offset);
2856 }
2857
2858 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2859 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2860 assert(has_signature_field(), "signature field must be present");
2861 method->obj_field_put(signature_offset, value);
2862 }
2863
2864 bool java_lang_reflect_Method::has_annotations_field() {
2865 return (annotations_offset >= 0);
2866 }
2867
2868 oop java_lang_reflect_Method::annotations(oop method) {
2869 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2870 assert(has_annotations_field(), "annotations field must be present");
2871 return method->obj_field(annotations_offset);
2872 }
2873
2874 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2875 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2876 assert(has_annotations_field(), "annotations field must be present");
2877 method->obj_field_put(annotations_offset, value);
2878 }
2879
2880 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2881 return (parameter_annotations_offset >= 0);
2882 }
2883
2884 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2886 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2887 return method->obj_field(parameter_annotations_offset);
2888 }
2889
2890 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2892 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2893 method->obj_field_put(parameter_annotations_offset, value);
2894 }
2895
2896 bool java_lang_reflect_Method::has_annotation_default_field() {
2897 return (annotation_default_offset >= 0);
2898 }
2899
2900 oop java_lang_reflect_Method::annotation_default(oop method) {
2901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2902 assert(has_annotation_default_field(), "annotation default field must be present");
2903 return method->obj_field(annotation_default_offset);
2904 }
2905
2906 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2907 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2908 assert(has_annotation_default_field(), "annotation default field must be present");
2909 method->obj_field_put(annotation_default_offset, value);
2910 }
2911
2912 bool java_lang_reflect_Method::has_type_annotations_field() {
2913 return (type_annotations_offset >= 0);
2914 }
2915
2916 oop java_lang_reflect_Method::type_annotations(oop method) {
2917 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2918 assert(has_type_annotations_field(), "type_annotations field must be present");
2919 return method->obj_field(type_annotations_offset);
2920 }
2921
2922 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2923 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2924 assert(has_type_annotations_field(), "type_annotations field must be present");
2925 method->obj_field_put(type_annotations_offset, value);
2926 }
2927
2928 #define CONSTRUCTOR_FIELDS_DO(macro) \
2929 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2930 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2931 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2932 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2933 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2934 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \
2935 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \
2936 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \
2937 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature)
2938
2939
2940 void java_lang_reflect_Constructor::compute_offsets() {
2941 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2942 // The generic signature and annotations fields are only present in 1.5
2943 signature_offset = -1;
2944 annotations_offset = -1;
2945 parameter_annotations_offset = -1;
2946 type_annotations_offset = -1;
2947 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2948 }
2949
2950 #if INCLUDE_CDS
2951 void java_lang_reflect_Constructor::serialize(SerializeClosure* f) {
2952 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2953 }
2954 #endif
2955
2956 Handle java_lang_reflect_Constructor::create(TRAPS) {
2957 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2958 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2959 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2960 InstanceKlass* ik = InstanceKlass::cast(k);
2961 // Ensure it is initialized
2962 ik->initialize(CHECK_NH);
2963 return ik->allocate_instance_handle(THREAD);
2964 }
2965
2966 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2967 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2968 return reflect->obj_field(clazz_offset);
2969 }
2970
2971 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2972 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2973 reflect->obj_field_put(clazz_offset, value);
2974 }
2975
2976 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2977 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2978 return constructor->obj_field(parameterTypes_offset);
2979 }
2980
2981 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2982 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2983 constructor->obj_field_put(parameterTypes_offset, value);
2984 }
2985
2986 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2988 return constructor->obj_field(exceptionTypes_offset);
2989 }
2990
2991 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2993 constructor->obj_field_put(exceptionTypes_offset, value);
2994 }
2995
2996 int java_lang_reflect_Constructor::slot(oop reflect) {
2997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2998 return reflect->int_field(slot_offset);
2999 }
3000
3001 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3002 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3003 reflect->int_field_put(slot_offset, value);
3004 }
3005
3006 int java_lang_reflect_Constructor::modifiers(oop constructor) {
3007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3008 return constructor->int_field(modifiers_offset);
3009 }
3010
3011 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3013 constructor->int_field_put(modifiers_offset, value);
3014 }
3015
3016 bool java_lang_reflect_Constructor::has_signature_field() {
3017 return (signature_offset >= 0);
3018 }
3019
3020 oop java_lang_reflect_Constructor::signature(oop constructor) {
3021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3022 assert(has_signature_field(), "signature field must be present");
3023 return constructor->obj_field(signature_offset);
3024 }
3025
3026 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3027 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3028 assert(has_signature_field(), "signature field must be present");
3029 constructor->obj_field_put(signature_offset, value);
3030 }
3031
3032 bool java_lang_reflect_Constructor::has_annotations_field() {
3033 return (annotations_offset >= 0);
3034 }
3035
3036 oop java_lang_reflect_Constructor::annotations(oop constructor) {
3037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3038 assert(has_annotations_field(), "annotations field must be present");
3039 return constructor->obj_field(annotations_offset);
3040 }
3041
3042 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3043 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3044 assert(has_annotations_field(), "annotations field must be present");
3045 constructor->obj_field_put(annotations_offset, value);
3046 }
3047
3048 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
3049 return (parameter_annotations_offset >= 0);
3050 }
3051
3052 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
3053 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3054 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
3055 return method->obj_field(parameter_annotations_offset);
3056 }
3057
3058 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3059 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3060 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
3061 method->obj_field_put(parameter_annotations_offset, value);
3062 }
3063
3064 bool java_lang_reflect_Constructor::has_type_annotations_field() {
3065 return (type_annotations_offset >= 0);
3066 }
3067
3068 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
3069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3070 assert(has_type_annotations_field(), "type_annotations field must be present");
3071 return constructor->obj_field(type_annotations_offset);
3072 }
3073
3074 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
3075 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3076 assert(has_type_annotations_field(), "type_annotations field must be present");
3077 constructor->obj_field_put(type_annotations_offset, value);
3078 }
3079
3080 #define FIELD_FIELDS_DO(macro) \
3081 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3082 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3083 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3084 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3085 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3086 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \
3087 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \
3088 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature)
3089
3090 void java_lang_reflect_Field::compute_offsets() {
3091 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3092 // The generic signature and annotations fields are only present in 1.5
3093 signature_offset = -1;
3094 annotations_offset = -1;
3095 type_annotations_offset = -1;
3096 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3097 }
3098
3099 #if INCLUDE_CDS
3100 void java_lang_reflect_Field::serialize(SerializeClosure* f) {
3101 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3102 }
3103 #endif
3104
3105 Handle java_lang_reflect_Field::create(TRAPS) {
3106 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3107 Symbol* name = vmSymbols::java_lang_reflect_Field();
3108 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3109 InstanceKlass* ik = InstanceKlass::cast(k);
3110 // Ensure it is initialized
3111 ik->initialize(CHECK_NH);
3112 return ik->allocate_instance_handle(THREAD);
3113 }
3114
3115 oop java_lang_reflect_Field::clazz(oop reflect) {
3116 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3117 return reflect->obj_field(clazz_offset);
3118 }
3119
3120 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3121 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3122 reflect->obj_field_put(clazz_offset, value);
3123 }
3124
3125 oop java_lang_reflect_Field::name(oop field) {
3126 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3127 return field->obj_field(name_offset);
3128 }
3129
3130 void java_lang_reflect_Field::set_name(oop field, oop value) {
3131 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3132 field->obj_field_put(name_offset, value);
3133 }
3134
3135 oop java_lang_reflect_Field::type(oop field) {
3136 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3137 return field->obj_field(type_offset);
3138 }
3139
3140 void java_lang_reflect_Field::set_type(oop field, oop value) {
3141 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3142 field->obj_field_put(type_offset, value);
3143 }
3144
3145 int java_lang_reflect_Field::slot(oop reflect) {
3146 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3147 return reflect->int_field(slot_offset);
3148 }
3149
3150 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3152 reflect->int_field_put(slot_offset, value);
3153 }
3154
3155 int java_lang_reflect_Field::modifiers(oop field) {
3156 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3157 return field->int_field(modifiers_offset);
3158 }
3159
3160 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3162 field->int_field_put(modifiers_offset, value);
3163 }
3164
3165 bool java_lang_reflect_Field::has_signature_field() {
3166 return (signature_offset >= 0);
3167 }
3168
3169 oop java_lang_reflect_Field::signature(oop field) {
3170 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3171 assert(has_signature_field(), "signature field must be present");
3172 return field->obj_field(signature_offset);
3173 }
3174
3175 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3176 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3177 assert(has_signature_field(), "signature field must be present");
3178 field->obj_field_put(signature_offset, value);
3179 }
3180
3181 bool java_lang_reflect_Field::has_annotations_field() {
3182 return (annotations_offset >= 0);
3183 }
3184
3185 oop java_lang_reflect_Field::annotations(oop field) {
3186 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3187 assert(has_annotations_field(), "annotations field must be present");
3188 return field->obj_field(annotations_offset);
3189 }
3190
3191 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3192 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3193 assert(has_annotations_field(), "annotations field must be present");
3194 field->obj_field_put(annotations_offset, value);
3195 }
3196
3197 bool java_lang_reflect_Field::has_type_annotations_field() {
3198 return (type_annotations_offset >= 0);
3199 }
3200
3201 oop java_lang_reflect_Field::type_annotations(oop field) {
3202 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3203 assert(has_type_annotations_field(), "type_annotations field must be present");
3204 return field->obj_field(type_annotations_offset);
3205 }
3206
3207 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
3208 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3209 assert(has_type_annotations_field(), "type_annotations field must be present");
3210 field->obj_field_put(type_annotations_offset, value);
3211 }
3212
3213 #define CONSTANTPOOL_FIELDS_DO(macro) \
3214 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3215
3216 void reflect_ConstantPool::compute_offsets() {
3217 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3218 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3219 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3220 }
3221
3222 #if INCLUDE_CDS
3223 void reflect_ConstantPool::serialize(SerializeClosure* f) {
3224 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3225 }
3226 #endif
3227
3228 #define PARAMETER_FIELDS_DO(macro) \
3229 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3230 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3231 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3232 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3233
3234 void java_lang_reflect_Parameter::compute_offsets() {
3235 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3236 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3237 }
3238
3239 #if INCLUDE_CDS
3240 void java_lang_reflect_Parameter::serialize(SerializeClosure* f) {
3241 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3242 }
3243 #endif
3244
3245 Handle java_lang_reflect_Parameter::create(TRAPS) {
3246 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3247 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3248 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3249 InstanceKlass* ik = InstanceKlass::cast(k);
3250 // Ensure it is initialized
3251 ik->initialize(CHECK_NH);
3252 return ik->allocate_instance_handle(THREAD);
3253 }
3254
3255 oop java_lang_reflect_Parameter::name(oop param) {
3256 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3257 return param->obj_field(name_offset);
3258 }
3259
3260 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3261 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3262 param->obj_field_put(name_offset, value);
3263 }
3264
3265 int java_lang_reflect_Parameter::modifiers(oop param) {
3266 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3267 return param->int_field(modifiers_offset);
3268 }
3269
3270 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3271 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3272 param->int_field_put(modifiers_offset, value);
3273 }
3274
3275 int java_lang_reflect_Parameter::index(oop param) {
3276 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3277 return param->int_field(index_offset);
3278 }
3279
3280 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3281 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3282 param->int_field_put(index_offset, value);
3283 }
3284
3285 oop java_lang_reflect_Parameter::executable(oop param) {
3286 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3287 return param->obj_field(executable_offset);
3288 }
3289
3290 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3291 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3292 param->obj_field_put(executable_offset, value);
3293 }
3294
3295
3296 int java_lang_Module::loader_offset;
3297 int java_lang_Module::name_offset;
3298 int java_lang_Module::_module_entry_offset = -1;
3299
3300 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3301 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3302 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3303 vmSymbols::java_lang_module_init_signature(),
3304 loader, module_name, CHECK_NH);
3305 }
3306
3307 #define MODULE_FIELDS_DO(macro) \
3308 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3309 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3310
3311 void java_lang_Module::compute_offsets() {
3312 InstanceKlass* k = SystemDictionary::Module_klass();
3313 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3314 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3315 }
3316
3317 #if INCLUDE_CDS
3318 void java_lang_Module::serialize(SerializeClosure* f) {
3319 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3320 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3321 }
3322 #endif
3323
3324 oop java_lang_Module::loader(oop module) {
3325 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3326 return module->obj_field(loader_offset);
3327 }
3328
3329 void java_lang_Module::set_loader(oop module, oop value) {
3330 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3331 module->obj_field_put(loader_offset, value);
3332 }
3333
3334 oop java_lang_Module::name(oop module) {
3335 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3336 return module->obj_field(name_offset);
3337 }
3338
3339 void java_lang_Module::set_name(oop module, oop value) {
3340 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3341 module->obj_field_put(name_offset, value);
3342 }
3343
3344 ModuleEntry* java_lang_Module::module_entry(oop module) {
3345 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3346 assert(module != NULL, "module can't be null");
3347 assert(oopDesc::is_oop(module), "module must be oop");
3348
3349 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3350 if (module_entry == NULL) {
3351 // If the inject field containing the ModuleEntry* is null then return the
3352 // class loader's unnamed module.
3353 oop loader = java_lang_Module::loader(module);
3354 Handle h_loader = Handle(Thread::current(), loader);
3355 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3356 return loader_cld->unnamed_module();
3357 }
3358 return module_entry;
3359 }
3360
3361 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3362 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3363 assert(module != NULL, "module can't be null");
3364 assert(oopDesc::is_oop(module), "module must be oop");
3365 module->address_field_put(_module_entry_offset, (address)module_entry);
3366 }
3367
3368 Handle reflect_ConstantPool::create(TRAPS) {
3369 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3370 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3371 // Ensure it is initialized
3372 k->initialize(CHECK_NH);
3373 return k->allocate_instance_handle(THREAD);
3374 }
3375
3376
3377 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3378 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3379 oop mirror = value->pool_holder()->java_mirror();
3380 // Save the mirror to get back the constant pool.
3381 reflect->obj_field_put(_oop_offset, mirror);
3382 }
3383
3384 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3385 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3386
3387 oop mirror = reflect->obj_field(_oop_offset);
3388 Klass* k = java_lang_Class::as_Klass(mirror);
3389 assert(k->is_instance_klass(), "Must be");
3390
3391 // Get the constant pool back from the klass. Since class redefinition
3392 // merges the new constant pool into the old, this is essentially the
3393 // same constant pool as the original. If constant pool merging is
3394 // no longer done in the future, this will have to change to save
3395 // the original.
3396 return InstanceKlass::cast(k)->constants();
3397 }
3398
3399 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3400 macro(_base_offset, k, "base", object_signature, false)
3401
3402 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3403 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3404 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3405 }
3406
3407 #if INCLUDE_CDS
3408 void reflect_UnsafeStaticFieldAccessorImpl::serialize(SerializeClosure* f) {
3409 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3410 }
3411 #endif
3412
3413 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3414 Klass* k = SystemDictionary::box_klass(type);
3415 if (k == NULL) return NULL;
3416 InstanceKlass* ik = InstanceKlass::cast(k);
3417 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3418 return ik->allocate_instance(THREAD);
3419 }
3420
3421
3422 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3423 oop box = initialize_and_allocate(type, CHECK_0);
3424 if (box == NULL) return NULL;
3425 switch (type) {
3426 case T_BOOLEAN:
3427 box->bool_field_put(value_offset, value->z);
3428 break;
3429 case T_CHAR:
3430 box->char_field_put(value_offset, value->c);
3431 break;
3432 case T_FLOAT:
3433 box->float_field_put(value_offset, value->f);
3434 break;
3435 case T_DOUBLE:
3436 box->double_field_put(long_value_offset, value->d);
3437 break;
3438 case T_BYTE:
3439 box->byte_field_put(value_offset, value->b);
3440 break;
3441 case T_SHORT:
3442 box->short_field_put(value_offset, value->s);
3443 break;
3444 case T_INT:
3445 box->int_field_put(value_offset, value->i);
3446 break;
3447 case T_LONG:
3448 box->long_field_put(long_value_offset, value->j);
3449 break;
3450 default:
3451 return NULL;
3452 }
3453 return box;
3454 }
3455
3456
3457 BasicType java_lang_boxing_object::basic_type(oop box) {
3458 if (box == NULL) return T_ILLEGAL;
3459 BasicType type = SystemDictionary::box_klass_type(box->klass());
3460 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3461 return T_ILLEGAL;
3462 return type;
3463 }
3464
3465
3466 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3467 BasicType type = SystemDictionary::box_klass_type(box->klass());
3468 switch (type) {
3469 case T_BOOLEAN:
3470 value->z = box->bool_field(value_offset);
3471 break;
3472 case T_CHAR:
3473 value->c = box->char_field(value_offset);
3474 break;
3475 case T_FLOAT:
3476 value->f = box->float_field(value_offset);
3477 break;
3478 case T_DOUBLE:
3479 value->d = box->double_field(long_value_offset);
3480 break;
3481 case T_BYTE:
3482 value->b = box->byte_field(value_offset);
3483 break;
3484 case T_SHORT:
3485 value->s = box->short_field(value_offset);
3486 break;
3487 case T_INT:
3488 value->i = box->int_field(value_offset);
3489 break;
3490 case T_LONG:
3491 value->j = box->long_field(long_value_offset);
3492 break;
3493 default:
3494 return T_ILLEGAL;
3495 } // end switch
3496 return type;
3497 }
3498
3499
3500 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3501 BasicType type = SystemDictionary::box_klass_type(box->klass());
3502 switch (type) {
3503 case T_BOOLEAN:
3504 box->bool_field_put(value_offset, value->z);
3505 break;
3506 case T_CHAR:
3507 box->char_field_put(value_offset, value->c);
3508 break;
3509 case T_FLOAT:
3510 box->float_field_put(value_offset, value->f);
3511 break;
3512 case T_DOUBLE:
3513 box->double_field_put(long_value_offset, value->d);
3514 break;
3515 case T_BYTE:
3516 box->byte_field_put(value_offset, value->b);
3517 break;
3518 case T_SHORT:
3519 box->short_field_put(value_offset, value->s);
3520 break;
3521 case T_INT:
3522 box->int_field_put(value_offset, value->i);
3523 break;
3524 case T_LONG:
3525 box->long_field_put(long_value_offset, value->j);
3526 break;
3527 default:
3528 return T_ILLEGAL;
3529 } // end switch
3530 return type;
3531 }
3532
3533
3534 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3535 switch (type) {
3536 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3537 case T_CHAR: st->print("%d", value->c); break;
3538 case T_BYTE: st->print("%d", value->b); break;
3539 case T_SHORT: st->print("%d", value->s); break;
3540 case T_INT: st->print("%d", value->i); break;
3541 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3542 case T_FLOAT: st->print("%f", value->f); break;
3543 case T_DOUBLE: st->print("%lf", value->d); break;
3544 default: st->print("type %d?", type); break;
3545 }
3546 }
3547
3548 // Support for java_lang_ref_Reference
3549
3550 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3551 assert(obj != NULL, "sanity");
3552 if (offset != java_lang_ref_Reference::referent_offset) {
3553 return false;
3554 }
3555
3556 Klass* k = obj->klass();
3557 if (!k->is_instance_klass()) {
3558 return false;
3559 }
3560
3561 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3562 bool is_reference = ik->reference_type() != REF_NONE;
3563 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3564 return is_reference;
3565 }
3566
3567 // Support for java_lang_ref_SoftReference
3568 //
3569
3570 #define SOFTREFERENCE_FIELDS_DO(macro) \
3571 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3572 macro(static_clock_offset, k, "clock", long_signature, true)
3573
3574 void java_lang_ref_SoftReference::compute_offsets() {
3575 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3576 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3577 }
3578
3579 #if INCLUDE_CDS
3580 void java_lang_ref_SoftReference::serialize(SerializeClosure* f) {
3581 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3582 }
3583 #endif
3584
3585 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3586 return ref->long_field(timestamp_offset);
3587 }
3588
3589 jlong java_lang_ref_SoftReference::clock() {
3590 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3591 oop base = ik->static_field_base_raw();
3592 return base->long_field(static_clock_offset);
3593 }
3594
3595 void java_lang_ref_SoftReference::set_clock(jlong value) {
3596 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3597 oop base = ik->static_field_base_raw();
3598 base->long_field_put(static_clock_offset, value);
3599 }
3600
3601 // Support for java_lang_invoke_DirectMethodHandle
3602
3603 int java_lang_invoke_DirectMethodHandle::_member_offset;
3604
3605 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3606 oop member_name = NULL;
3607 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3608 "a DirectMethodHandle oop is expected");
3609 return dmh->obj_field(member_offset_in_bytes());
3610 }
3611
3612 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3613 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3614
3615 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3616 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3617 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3618 }
3619
3620 #if INCLUDE_CDS
3621 void java_lang_invoke_DirectMethodHandle::serialize(SerializeClosure* f) {
3622 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3623 }
3624 #endif
3625
3626 // Support for java_lang_invoke_MethodHandle
3627
3628 int java_lang_invoke_MethodHandle::_type_offset;
3629 int java_lang_invoke_MethodHandle::_form_offset;
3630
3631 int java_lang_invoke_MemberName::_clazz_offset;
3632 int java_lang_invoke_MemberName::_name_offset;
3633 int java_lang_invoke_MemberName::_type_offset;
3634 int java_lang_invoke_MemberName::_flags_offset;
3635 int java_lang_invoke_MemberName::_method_offset;
3636 int java_lang_invoke_MemberName::_vmindex_offset;
3637
3638 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3639 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3640
3641 int java_lang_invoke_LambdaForm::_vmentry_offset;
3642
3643 #define METHODHANDLE_FIELDS_DO(macro) \
3644 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3645 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3646
3647 void java_lang_invoke_MethodHandle::compute_offsets() {
3648 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3649 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3650 }
3651
3652 #if INCLUDE_CDS
3653 void java_lang_invoke_MethodHandle::serialize(SerializeClosure* f) {
3654 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3655 }
3656 #endif
3657
3658 #define MEMBERNAME_FIELDS_DO(macro) \
3659 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3660 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3661 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3662 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3663 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3664
3665 void java_lang_invoke_MemberName::compute_offsets() {
3666 InstanceKlass* k = SystemDictionary::MemberName_klass();
3667 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3668 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3669 }
3670
3671 #if INCLUDE_CDS
3672 void java_lang_invoke_MemberName::serialize(SerializeClosure* f) {
3673 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3674 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3675 }
3676 #endif
3677
3678 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3679 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3680 assert(k != NULL, "jdk mismatch");
3681 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3682 }
3683
3684 #if INCLUDE_CDS
3685 void java_lang_invoke_ResolvedMethodName::serialize(SerializeClosure* f) {
3686 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3687 }
3688 #endif
3689
3690 #define LAMBDAFORM_FIELDS_DO(macro) \
3691 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3692
3693 void java_lang_invoke_LambdaForm::compute_offsets() {
3694 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3695 assert (k != NULL, "jdk mismatch");
3696 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3697 }
3698
3699 #if INCLUDE_CDS
3700 void java_lang_invoke_LambdaForm::serialize(SerializeClosure* f) {
3701 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3702 }
3703 #endif
3704
3705 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3706 return obj != NULL && is_subclass(obj->klass());
3707 }
3708
3709
3710 oop java_lang_invoke_MethodHandle::type(oop mh) {
3711 return mh->obj_field(_type_offset);
3712 }
3713
3714 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3715 mh->obj_field_put(_type_offset, mtype);
3716 }
3717
3718 oop java_lang_invoke_MethodHandle::form(oop mh) {
3719 assert(_form_offset != 0, "");
3720 return mh->obj_field(_form_offset);
3721 }
3722
3723 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3724 assert(_form_offset != 0, "");
3725 mh->obj_field_put(_form_offset, lform);
3726 }
3727
3728 /// MemberName accessors
3729
3730 oop java_lang_invoke_MemberName::clazz(oop mname) {
3731 assert(is_instance(mname), "wrong type");
3732 return mname->obj_field(_clazz_offset);
3733 }
3734
3735 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3736 assert(is_instance(mname), "wrong type");
3737 mname->obj_field_put(_clazz_offset, clazz);
3738 }
3739
3740 oop java_lang_invoke_MemberName::name(oop mname) {
3741 assert(is_instance(mname), "wrong type");
3742 return mname->obj_field(_name_offset);
3743 }
3744
3745 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3746 assert(is_instance(mname), "wrong type");
3747 mname->obj_field_put(_name_offset, name);
3748 }
3749
3750 oop java_lang_invoke_MemberName::type(oop mname) {
3751 assert(is_instance(mname), "wrong type");
3752 return mname->obj_field(_type_offset);
3753 }
3754
3755 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3756 assert(is_instance(mname), "wrong type");
3757 mname->obj_field_put(_type_offset, type);
3758 }
3759
3760 int java_lang_invoke_MemberName::flags(oop mname) {
3761 assert(is_instance(mname), "wrong type");
3762 return mname->int_field(_flags_offset);
3763 }
3764
3765 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3766 assert(is_instance(mname), "wrong type");
3767 mname->int_field_put(_flags_offset, flags);
3768 }
3769
3770
3771 // Return vmtarget from ResolvedMethodName method field through indirection
3772 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3773 assert(is_instance(mname), "wrong type");
3774 oop method = mname->obj_field(_method_offset);
3775 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3776 }
3777
3778 bool java_lang_invoke_MemberName::is_method(oop mname) {
3779 assert(is_instance(mname), "must be MemberName");
3780 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3781 }
3782
3783 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3784 assert(is_instance(mname), "wrong type");
3785 mname->obj_field_put(_method_offset, resolved_method);
3786 }
3787
3788 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3789 assert(is_instance(mname), "wrong type");
3790 return (intptr_t) mname->address_field(_vmindex_offset);
3791 }
3792
3793 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3794 assert(is_instance(mname), "wrong type");
3795 mname->address_field_put(_vmindex_offset, (address) index);
3796 }
3797
3798
3799 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3800 assert(is_instance(resolved_method), "wrong type");
3801 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3802 assert(m->is_method(), "must be");
3803 return m;
3804 }
3805
3806 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3807 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3808 assert(is_instance(resolved_method), "wrong type");
3809 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3810 }
3811
3812 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3813 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3814 oop resolved_method = ResolvedMethodTable::find_method(m());
3815 if (resolved_method == NULL) {
3816 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3817 if (!k->is_initialized()) {
3818 k->initialize(CHECK_NULL);
3819 }
3820 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3821 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3822 // Add a reference to the loader (actually mirror because anonymous classes will not have
3823 // distinct loaders) to ensure the metadata is kept alive.
3824 // This mirror may be different than the one in clazz field.
3825 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3826 resolved_method = ResolvedMethodTable::add_method(m, Handle(THREAD, new_resolved_method));
3827 }
3828 return resolved_method;
3829 }
3830
3831 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3832 assert(is_instance(lform), "wrong type");
3833 return lform->obj_field(_vmentry_offset);
3834 }
3835
3836
3837 // Support for java_lang_invoke_MethodType
3838
3839 int java_lang_invoke_MethodType::_rtype_offset;
3840 int java_lang_invoke_MethodType::_ptypes_offset;
3841
3842 #define METHODTYPE_FIELDS_DO(macro) \
3843 macro(_rtype_offset, k, "rtype", class_signature, false); \
3844 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3845
3846 void java_lang_invoke_MethodType::compute_offsets() {
3847 InstanceKlass* k = SystemDictionary::MethodType_klass();
3848 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3849 }
3850
3851 #if INCLUDE_CDS
3852 void java_lang_invoke_MethodType::serialize(SerializeClosure* f) {
3853 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3854 }
3855 #endif
3856
3857 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3858 st->print("(");
3859 objArrayOop pts = ptypes(mt);
3860 for (int i = 0, limit = pts->length(); i < limit; i++) {
3861 java_lang_Class::print_signature(pts->obj_at(i), st);
3862 }
3863 st->print(")");
3864 java_lang_Class::print_signature(rtype(mt), st);
3865 }
3866
3867 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3868 ResourceMark rm;
3869 stringStream buffer(128);
3870 print_signature(mt, &buffer);
3871 const char* sigstr = buffer.base();
3872 int siglen = (int) buffer.size();
3873 Symbol *name;
3874 if (!intern_if_not_found) {
3875 name = SymbolTable::probe(sigstr, siglen);
3876 } else {
3877 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3878 }
3879 return name;
3880 }
3881
3882 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3883 if (oopDesc::equals(mt1, mt2))
3884 return true;
3885 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3886 return false;
3887 if (ptype_count(mt1) != ptype_count(mt2))
3888 return false;
3889 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3890 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3891 return false;
3892 }
3893 return true;
3894 }
3895
3896 oop java_lang_invoke_MethodType::rtype(oop mt) {
3897 assert(is_instance(mt), "must be a MethodType");
3898 return mt->obj_field(_rtype_offset);
3899 }
3900
3901 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3902 assert(is_instance(mt), "must be a MethodType");
3903 return (objArrayOop) mt->obj_field(_ptypes_offset);
3904 }
3905
3906 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3907 return ptypes(mt)->obj_at(idx);
3908 }
3909
3910 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3911 return ptypes(mt)->length();
3912 }
3913
3914 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3915 objArrayOop pts = ptypes(mt);
3916 int count = pts->length();
3917 int slots = 0;
3918 for (int i = 0; i < count; i++) {
3919 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3920 slots += type2size[bt];
3921 }
3922 return slots;
3923 }
3924
3925 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3926 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3927 return type2size[bt];
3928 }
3929
3930
3931 // Support for java_lang_invoke_CallSite
3932
3933 int java_lang_invoke_CallSite::_target_offset;
3934 int java_lang_invoke_CallSite::_context_offset;
3935
3936 #define CALLSITE_FIELDS_DO(macro) \
3937 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3938 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3939
3940 void java_lang_invoke_CallSite::compute_offsets() {
3941 InstanceKlass* k = SystemDictionary::CallSite_klass();
3942 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3943 }
3944
3945 #if INCLUDE_CDS
3946 void java_lang_invoke_CallSite::serialize(SerializeClosure* f) {
3947 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3948 }
3949 #endif
3950
3951 oop java_lang_invoke_CallSite::context(oop call_site) {
3952 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3953
3954 oop dep_oop = call_site->obj_field(_context_offset);
3955 return dep_oop;
3956 }
3957
3958 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3959
3960 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3961
3962 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3963 InstanceKlass* k = SystemDictionary::Context_klass();
3964 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3965 }
3966
3967 #if INCLUDE_CDS
3968 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize(SerializeClosure* f) {
3969 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3970 }
3971 #endif
3972
3973 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3974 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3975 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset);
3976 DependencyContext dep_ctx(vmdeps_addr);
3977 return dep_ctx;
3978 }
3979
3980 // Support for java_security_AccessControlContext
3981
3982 int java_security_AccessControlContext::_context_offset = 0;
3983 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3984 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3985 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3986
3987 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3988 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3989 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3990 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3991 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3992
3993 void java_security_AccessControlContext::compute_offsets() {
3994 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3995 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3996 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3997 }
3998
3999 #if INCLUDE_CDS
4000 void java_security_AccessControlContext::serialize(SerializeClosure* f) {
4001 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4002 }
4003 #endif
4004
4005 bool java_security_AccessControlContext::is_authorized(Handle context) {
4006 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
4007 assert(_isAuthorized_offset != -1, "should be set");
4008 return context->bool_field(_isAuthorized_offset) != 0;
4009 }
4010
4011 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4012 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4013 // Ensure klass is initialized
4014 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
4015 // Allocate result
4016 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
4017 // Fill in values
4018 result->obj_field_put(_context_offset, context());
4019 result->obj_field_put(_privilegedContext_offset, privileged_context());
4020 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4021 // whitelist AccessControlContexts created by the JVM if present
4022 if (_isAuthorized_offset != -1) {
4023 result->bool_field_put(_isAuthorized_offset, true);
4024 }
4025 return result;
4026 }
4027
4028
4029 // Support for java_lang_ClassLoader
4030
4031 bool java_lang_ClassLoader::offsets_computed = false;
4032 int java_lang_ClassLoader::_loader_data_offset = -1;
4033 int java_lang_ClassLoader::parallelCapable_offset = -1;
4034 int java_lang_ClassLoader::name_offset = -1;
4035 int java_lang_ClassLoader::nameAndId_offset = -1;
4036 int java_lang_ClassLoader::unnamedModule_offset = -1;
4037
4038 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4039 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
4040 return HeapAccess<>::load_at(loader, _loader_data_offset);
4041 }
4042
4043 ClassLoaderData* java_lang_ClassLoader::cmpxchg_loader_data(ClassLoaderData* new_data, oop loader, ClassLoaderData* expected_data) {
4044 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
4045 return HeapAccess<>::atomic_cmpxchg_at(new_data, loader, _loader_data_offset, expected_data);
4046 }
4047
4048 #define CLASSLOADER_FIELDS_DO(macro) \
4049 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4050 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4051 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
4052 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4053 macro(parent_offset, k1, "parent", classloader_signature, false)
4054
4055 void java_lang_ClassLoader::compute_offsets() {
4056 assert(!offsets_computed, "offsets should be initialized only once");
4057 offsets_computed = true;
4058
4059 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
4060 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4061
4062 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4063 }
4064
4065 #if INCLUDE_CDS
4066 void java_lang_ClassLoader::serialize(SerializeClosure* f) {
4067 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4068 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4069 }
4070 #endif
4071
4072 oop java_lang_ClassLoader::parent(oop loader) {
4073 assert(is_instance(loader), "loader must be oop");
4074 return loader->obj_field(parent_offset);
4075 }
4076
4077 // Returns the name field of this class loader. If the name field has not
4078 // been set, null will be returned.
4079 oop java_lang_ClassLoader::name(oop loader) {
4080 assert(is_instance(loader), "loader must be oop");
4081 return loader->obj_field(name_offset);
4082 }
4083
4084 // Returns the nameAndId field of this class loader. The format is
4085 // as follows:
4086 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4087 // If the defining loader has no name then <qualified-class-name> @<id>
4088 // If built-in loader, then omit '@<id>' as there is only one instance.
4089 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4090 oop java_lang_ClassLoader::nameAndId(oop loader) {
4091 assert(is_instance(loader), "loader must be oop");
4092 return loader->obj_field(nameAndId_offset);
4093 }
4094
4095 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4096 assert(is_instance(loader), "loader must be oop");
4097 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4098 oop acl = loader;
4099 debug_only(jint loop_count = 0);
4100 // This loop taken verbatim from ClassLoader.java:
4101 do {
4102 acl = parent(acl);
4103 if (oopDesc::equals(cl, acl)) {
4104 return true;
4105 }
4106 assert(++loop_count > 0, "loop_count overflow");
4107 } while (acl != NULL);
4108 return false;
4109 }
4110
4111 bool java_lang_ClassLoader::is_instance(oop obj) {
4112 return obj != NULL && is_subclass(obj->klass());
4113 }
4114
4115
4116 // For class loader classes, parallelCapable defined
4117 // based on non-null field
4118 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4119 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4120 if (parallelCapable_offset == -1) {
4121 // Default for backward compatibility is false
4122 return false;
4123 }
4124 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4125 }
4126
4127 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4128 // Fix for 4474172; see evaluation for more details
4129 loader = non_reflection_class_loader(loader);
4130
4131 oop cl = SystemDictionary::java_system_loader();
4132 while(cl != NULL) {
4133 if (oopDesc::equals(cl, loader)) return true;
4134 cl = parent(cl);
4135 }
4136 return false;
4137 }
4138
4139 // Return true if this is one of the class loaders associated with
4140 // the generated bytecodes for reflection.
4141 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4142 if (loader != NULL) {
4143 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4144 // This might be null in non-1.4 JDKs
4145 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4146 }
4147 return false;
4148 }
4149
4150 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4151 // See whether this is one of the class loaders associated with
4152 // the generated bytecodes for reflection, and if so, "magically"
4153 // delegate to its parent to prevent class loading from occurring
4154 // in places where applications using reflection didn't expect it.
4155 if (is_reflection_class_loader(loader)) {
4156 return parent(loader);
4157 }
4158 return loader;
4159 }
4160
4161 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4162 assert(is_instance(loader), "loader must be oop");
4163 return loader->obj_field(unnamedModule_offset);
4164 }
4165
4166 // Caller needs ResourceMark.
4167 const char* java_lang_ClassLoader::describe_external(const oop loader) {
4168 ClassLoaderData *cld = ClassLoaderData::class_loader_data(loader);
4169 const char* name = cld->loader_name_and_id();
4170
4171 // bootstrap loader
4172 if (loader == NULL) {
4173 return name;
4174 }
4175
4176 bool well_known_loader = SystemDictionary::is_system_class_loader(loader) ||
4177 SystemDictionary::is_platform_class_loader(loader);
4178
4179 stringStream ss;
4180 ss.print("%s (instance of %s", name, loader->klass()->external_name());
4181 if (!well_known_loader) {
4182 oop pl = java_lang_ClassLoader::parent(loader);
4183 const char* parentName = "";
4184 ClassLoaderData *parent_cld = ClassLoaderData::class_loader_data_or_null(pl);
4185 // The parent loader's ClassLoaderData could be null if it is
4186 // a delegating class loader that has never defined a class.
4187 // In this case the loader's name must be obtained via the parent loader's oop.
4188 if (parent_cld == NULL) {
4189 oop cl_name_and_id = java_lang_ClassLoader::nameAndId(pl);
4190 if (cl_name_and_id != NULL) {
4191 parentName = java_lang_String::as_utf8_string(cl_name_and_id);
4192 }
4193 } else {
4194 parentName = parent_cld->loader_name_and_id();
4195 }
4196 if (pl != NULL) {
4197 ss.print(", child of %s %s", parentName, pl->klass()->external_name());
4198 } else {
4199 // bootstrap loader
4200 ss.print(", child of %s", parentName);
4201 }
4202 }
4203 ss.print(")");
4204
4205 return ss.as_string();
4206 }
4207
4208 // Support for java_lang_System
4209 //
4210 #define SYSTEM_FIELDS_DO(macro) \
4211 macro(static_in_offset, k, "in", input_stream_signature, true); \
4212 macro(static_out_offset, k, "out", print_stream_signature, true); \
4213 macro(static_err_offset, k, "err", print_stream_signature, true); \
4214 macro(static_security_offset, k, "security", security_manager_signature, true)
4215
4216 void java_lang_System::compute_offsets() {
4217 InstanceKlass* k = SystemDictionary::System_klass();
4218 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4219 }
4220
4221 #if INCLUDE_CDS
4222 void java_lang_System::serialize(SerializeClosure* f) {
4223 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4224 }
4225 #endif
4226
4227 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4228 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4229 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4230
4231
4232 bool java_lang_System::has_security_manager() {
4233 InstanceKlass* ik = SystemDictionary::System_klass();
4234 oop base = ik->static_field_base_raw();
4235 return base->obj_field(static_security_offset) != NULL;
4236 }
4237
4238 int java_lang_Class::_klass_offset;
4239 int java_lang_Class::_array_klass_offset;
4240 int java_lang_Class::_oop_size_offset;
4241 int java_lang_Class::_static_oop_field_count_offset;
4242 int java_lang_Class::_class_loader_offset;
4243 int java_lang_Class::_module_offset;
4244 int java_lang_Class::_protection_domain_offset;
4245 int java_lang_Class::_component_mirror_offset;
4246 int java_lang_Class::_init_lock_offset;
4247 int java_lang_Class::_signers_offset;
4248 int java_lang_Class::_name_offset;
4249 int java_lang_Class::_source_file_offset;
4250 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4251 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4252 int java_lang_Throwable::backtrace_offset;
4253 int java_lang_Throwable::detailMessage_offset;
4254 int java_lang_Throwable::stackTrace_offset;
4255 int java_lang_Throwable::depth_offset;
4256 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4257 int java_lang_reflect_AccessibleObject::override_offset;
4258 int java_lang_reflect_Method::clazz_offset;
4259 int java_lang_reflect_Method::name_offset;
4260 int java_lang_reflect_Method::returnType_offset;
4261 int java_lang_reflect_Method::parameterTypes_offset;
4262 int java_lang_reflect_Method::exceptionTypes_offset;
4263 int java_lang_reflect_Method::slot_offset;
4264 int java_lang_reflect_Method::modifiers_offset;
4265 int java_lang_reflect_Method::signature_offset;
4266 int java_lang_reflect_Method::annotations_offset;
4267 int java_lang_reflect_Method::parameter_annotations_offset;
4268 int java_lang_reflect_Method::annotation_default_offset;
4269 int java_lang_reflect_Method::type_annotations_offset;
4270 int java_lang_reflect_Constructor::clazz_offset;
4271 int java_lang_reflect_Constructor::parameterTypes_offset;
4272 int java_lang_reflect_Constructor::exceptionTypes_offset;
4273 int java_lang_reflect_Constructor::slot_offset;
4274 int java_lang_reflect_Constructor::modifiers_offset;
4275 int java_lang_reflect_Constructor::signature_offset;
4276 int java_lang_reflect_Constructor::annotations_offset;
4277 int java_lang_reflect_Constructor::parameter_annotations_offset;
4278 int java_lang_reflect_Constructor::type_annotations_offset;
4279 int java_lang_reflect_Field::clazz_offset;
4280 int java_lang_reflect_Field::name_offset;
4281 int java_lang_reflect_Field::type_offset;
4282 int java_lang_reflect_Field::slot_offset;
4283 int java_lang_reflect_Field::modifiers_offset;
4284 int java_lang_reflect_Field::signature_offset;
4285 int java_lang_reflect_Field::annotations_offset;
4286 int java_lang_reflect_Field::type_annotations_offset;
4287 int java_lang_reflect_Parameter::name_offset;
4288 int java_lang_reflect_Parameter::modifiers_offset;
4289 int java_lang_reflect_Parameter::index_offset;
4290 int java_lang_reflect_Parameter::executable_offset;
4291 int java_lang_boxing_object::value_offset;
4292 int java_lang_boxing_object::long_value_offset;
4293 int java_lang_ref_Reference::referent_offset;
4294 int java_lang_ref_Reference::queue_offset;
4295 int java_lang_ref_Reference::next_offset;
4296 int java_lang_ref_Reference::discovered_offset;
4297 int java_lang_ref_SoftReference::timestamp_offset;
4298 int java_lang_ref_SoftReference::static_clock_offset;
4299 int java_lang_ClassLoader::parent_offset;
4300 int java_lang_System::static_in_offset;
4301 int java_lang_System::static_out_offset;
4302 int java_lang_System::static_err_offset;
4303 int java_lang_System::static_security_offset;
4304 int java_lang_StackTraceElement::methodName_offset;
4305 int java_lang_StackTraceElement::fileName_offset;
4306 int java_lang_StackTraceElement::lineNumber_offset;
4307 int java_lang_StackTraceElement::moduleName_offset;
4308 int java_lang_StackTraceElement::moduleVersion_offset;
4309 int java_lang_StackTraceElement::classLoaderName_offset;
4310 int java_lang_StackTraceElement::declaringClass_offset;
4311 int java_lang_StackTraceElement::declaringClassObject_offset;
4312 int java_lang_StackFrameInfo::_memberName_offset;
4313 int java_lang_StackFrameInfo::_bci_offset;
4314 int java_lang_StackFrameInfo::_version_offset;
4315 int java_lang_LiveStackFrameInfo::_monitors_offset;
4316 int java_lang_LiveStackFrameInfo::_locals_offset;
4317 int java_lang_LiveStackFrameInfo::_operands_offset;
4318 int java_lang_LiveStackFrameInfo::_mode_offset;
4319 int java_lang_AssertionStatusDirectives::classes_offset;
4320 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4321 int java_lang_AssertionStatusDirectives::packages_offset;
4322 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4323 int java_lang_AssertionStatusDirectives::deflt_offset;
4324 int java_nio_Buffer::_limit_offset;
4325 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4326 int reflect_ConstantPool::_oop_offset;
4327 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4328
4329 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4330 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4331 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4332 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4333 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4334 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4335 macro(methodName_offset, k, "methodName", string_signature, false); \
4336 macro(fileName_offset, k, "fileName", string_signature, false); \
4337 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4338
4339 // Support for java_lang_StackTraceElement
4340 void java_lang_StackTraceElement::compute_offsets() {
4341 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4342 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4343 }
4344
4345 #if INCLUDE_CDS
4346 void java_lang_StackTraceElement::serialize(SerializeClosure* f) {
4347 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4348 }
4349 #endif
4350
4351 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4352 element->obj_field_put(fileName_offset, value);
4353 }
4354
4355 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4356 element->obj_field_put(declaringClass_offset, value);
4357 }
4358
4359 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4360 element->obj_field_put(methodName_offset, value);
4361 }
4362
4363 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4364 element->int_field_put(lineNumber_offset, value);
4365 }
4366
4367 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4368 element->obj_field_put(moduleName_offset, value);
4369 }
4370
4371 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4372 element->obj_field_put(moduleVersion_offset, value);
4373 }
4374
4375 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4376 element->obj_field_put(classLoaderName_offset, value);
4377 }
4378
4379 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4380 element->obj_field_put(declaringClassObject_offset, value);
4381 }
4382
4383 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4384 element->short_field_put(_version_offset, value);
4385 }
4386
4387 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4388 element->int_field_put(_bci_offset, value);
4389 }
4390
4391 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4392 element->obj_field_put(_monitors_offset, value);
4393 }
4394
4395 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4396 element->obj_field_put(_locals_offset, value);
4397 }
4398
4399 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4400 element->obj_field_put(_operands_offset, value);
4401 }
4402
4403 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4404 element->int_field_put(_mode_offset, value);
4405 }
4406
4407 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4408 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4409 macro(classes_offset, k, "classes", string_array_signature, false); \
4410 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4411 macro(packages_offset, k, "packages", string_array_signature, false); \
4412 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4413 macro(deflt_offset, k, "deflt", bool_signature, false)
4414
4415 void java_lang_AssertionStatusDirectives::compute_offsets() {
4416 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4417 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4418 }
4419
4420 #if INCLUDE_CDS
4421 void java_lang_AssertionStatusDirectives::serialize(SerializeClosure* f) {
4422 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4423 }
4424 #endif
4425
4426 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4427 o->obj_field_put(classes_offset, val);
4428 }
4429
4430 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4431 o->obj_field_put(classEnabled_offset, val);
4432 }
4433
4434 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4435 o->obj_field_put(packages_offset, val);
4436 }
4437
4438 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4439 o->obj_field_put(packageEnabled_offset, val);
4440 }
4441
4442 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4443 o->bool_field_put(deflt_offset, val);
4444 }
4445
4446
4447 // Support for intrinsification of java.nio.Buffer.checkIndex
4448 int java_nio_Buffer::limit_offset() {
4449 return _limit_offset;
4450 }
4451
4452 #define BUFFER_FIELDS_DO(macro) \
4453 macro(_limit_offset, k, "limit", int_signature, false)
4454
4455 void java_nio_Buffer::compute_offsets() {
4456 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4457 assert(k != NULL, "must be loaded in 1.4+");
4458 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4459 }
4460
4461 #if INCLUDE_CDS
4462 void java_nio_Buffer::serialize(SerializeClosure* f) {
4463 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4464 }
4465 #endif
4466
4467 #define AOS_FIELDS_DO(macro) \
4468 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4469
4470 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4471 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4472 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4473 }
4474
4475 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4476 assert(_owner_offset != 0, "Must be initialized");
4477 return obj->obj_field(_owner_offset);
4478 }
4479
4480 #if INCLUDE_CDS
4481 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize(SerializeClosure* f) {
4482 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4483 }
4484 #endif
4485
4486 static int member_offset(int hardcoded_offset) {
4487 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4488 }
4489
4490 // Compute hard-coded offsets
4491 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4492 // are not available to determine the offset_of_static_fields.
4493 void JavaClasses::compute_hard_coded_offsets() {
4494
4495 // java_lang_boxing_object
4496 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4497 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4498
4499 // java_lang_ref_Reference
4500 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4501 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4502 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4503 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4504 }
4505
4506
4507 // Compute non-hard-coded field offsets of all the classes in this file
4508 void JavaClasses::compute_offsets() {
4509 if (UseSharedSpaces) {
4510 return; // field offsets are loaded from archive
4511 }
4512
4513 // java_lang_Class::compute_offsets was called earlier in bootstrap
4514 java_lang_System::compute_offsets();
4515 java_lang_ClassLoader::compute_offsets();
4516 java_lang_Throwable::compute_offsets();
4517 java_lang_Thread::compute_offsets();
4518 java_lang_ThreadGroup::compute_offsets();
4519 java_lang_AssertionStatusDirectives::compute_offsets();
4520 java_lang_ref_SoftReference::compute_offsets();
4521 java_lang_invoke_MethodHandle::compute_offsets();
4522 java_lang_invoke_DirectMethodHandle::compute_offsets();
4523 java_lang_invoke_MemberName::compute_offsets();
4524 java_lang_invoke_ResolvedMethodName::compute_offsets();
4525 java_lang_invoke_LambdaForm::compute_offsets();
4526 java_lang_invoke_MethodType::compute_offsets();
4527 java_lang_invoke_CallSite::compute_offsets();
4528 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
4529 java_security_AccessControlContext::compute_offsets();
4530 // Initialize reflection classes. The layouts of these classes
4531 // changed with the new reflection implementation in JDK 1.4, and
4532 // since the Universe doesn't know what JDK version it is until this
4533 // point we defer computation of these offsets until now.
4534 java_lang_reflect_AccessibleObject::compute_offsets();
4535 java_lang_reflect_Method::compute_offsets();
4536 java_lang_reflect_Constructor::compute_offsets();
4537 java_lang_reflect_Field::compute_offsets();
4538 java_nio_Buffer::compute_offsets();
4539 reflect_ConstantPool::compute_offsets();
4540 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
4541 java_lang_reflect_Parameter::compute_offsets();
4542 java_lang_Module::compute_offsets();
4543 java_lang_StackTraceElement::compute_offsets();
4544 java_lang_StackFrameInfo::compute_offsets();
4545 java_lang_LiveStackFrameInfo::compute_offsets();
4546 java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets();
4547
4548 // generated interpreter code wants to know about the offsets we just computed:
4549 AbstractAssembler::update_delayed_values();
4550 }
4551
4552 #ifndef PRODUCT
4553
4554 // These functions exist to assert the validity of hard-coded field offsets to guard
4555 // against changes in the class files
4556
4557 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4558 EXCEPTION_MARK;
4559 fieldDescriptor fd;
4560 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4561 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4562 InstanceKlass* ik = InstanceKlass::cast(k);
4563 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4564 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4565 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4566 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4567 return false;
4568 }
4569 if (fd.is_static()) {
4570 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4571 return false;
4572 }
4573 if (fd.offset() == hardcoded_offset ) {
4574 return true;
4575 } else {
4576 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4577 klass_name, field_name, hardcoded_offset, fd.offset());
4578 return false;
4579 }
4580 }
4581
4582 // Check the hard-coded field offsets of all the classes in this file
4583
4584 void JavaClasses::check_offsets() {
4585 bool valid = true;
4586
4587 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4588 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4589
4590 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4591 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4592
4593 // Boxed primitive objects (java_lang_boxing_object)
4594
4595 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4596 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4597 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4598 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4599 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4600 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4601 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4602 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4603
4604 // java.lang.ref.Reference
4605
4606 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4607 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4608 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4609 // Fake field
4610 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4611
4612 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4613 }
4614
4615 #endif // PRODUCT
4616
4617 int InjectedField::compute_offset() {
4618 InstanceKlass* ik = InstanceKlass::cast(klass());
4619 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4620 if (!may_be_java && !fs.access_flags().is_internal()) {
4621 // Only look at injected fields
4622 continue;
4623 }
4624 if (fs.name() == name() && fs.signature() == signature()) {
4625 return fs.offset();
4626 }
4627 }
4628 ResourceMark rm;
4629 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)" : "");
4630 #ifndef PRODUCT
4631 ik->print();
4632 tty->print_cr("all fields:");
4633 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4634 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4635 }
4636 #endif //PRODUCT
4637 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
4638 return -1;
4639 }
4640
4641 void javaClasses_init() {
4642 JavaClasses::compute_offsets();
4643 JavaClasses::check_offsets();
4644 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4645 }