1 /*
2 * Copyright (c) 1997, 2017, 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 "memory/oopFactory.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.inline.hpp"
39 #include "oops/fieldStreams.hpp"
40 #include "oops/instanceKlass.hpp"
41 #include "oops/instanceMirrorKlass.hpp"
42 #include "oops/klass.hpp"
43 #include "oops/method.hpp"
44 #include "oops/objArrayOop.inline.hpp"
45 #include "oops/oop.inline.hpp"
46 #include "oops/symbol.hpp"
47 #include "oops/typeArrayOop.hpp"
48 #include "prims/resolvedMethodTable.hpp"
49 #include "runtime/fieldDescriptor.hpp"
50 #include "runtime/handles.inline.hpp"
51 #include "runtime/interfaceSupport.hpp"
52 #include "runtime/java.hpp"
53 #include "runtime/javaCalls.hpp"
54 #include "runtime/safepoint.hpp"
55 #include "runtime/thread.inline.hpp"
56 #include "runtime/vframe.hpp"
57 #include "utilities/preserveException.hpp"
58
59 #if INCLUDE_JVMCI
60 #include "jvmci/jvmciJavaClasses.hpp"
61 #endif
62
63 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
64 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
65
66 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
67 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
68
69 InjectedField JavaClasses::_injected_fields[] = {
70 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
71 };
72
73 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
74 return _injected_fields[id].compute_offset();
75 }
76
77
78 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
79 *field_count = 0;
80
81 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
82 if (sid == vmSymbols::NO_SID) {
83 // Only well known classes can inject fields
84 return NULL;
85 }
86
87 int count = 0;
88 int start = -1;
89
90 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
91 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
92 count++; \
93 if (start == -1) start = klass##_##name##_enum; \
94 }
95 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
96 #undef LOOKUP_INJECTED_FIELD
97
98 if (start != -1) {
99 *field_count = count;
100 return _injected_fields + start;
101 }
102 return NULL;
103 }
104
105
106 static bool find_field(InstanceKlass* ik,
107 Symbol* name_symbol, Symbol* signature_symbol,
108 fieldDescriptor* fd,
109 bool is_static = false, bool allow_super = false) {
110 if (allow_super || is_static) {
111 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL;
112 } else {
113 return ik->find_local_field(name_symbol, signature_symbol, fd);
114 }
115 }
116
117 // Helpful routine for computing field offsets at run time rather than hardcoding them
118 static void
119 compute_offset(int &dest_offset,
120 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol,
121 bool is_static = false, bool allow_super = false) {
122 fieldDescriptor fd;
123 InstanceKlass* ik = InstanceKlass::cast(klass);
124 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) {
125 ResourceMark rm;
126 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
127 #ifndef PRODUCT
128 ik->print();
129 tty->print_cr("all fields:");
130 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
131 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
132 }
133 #endif //PRODUCT
134 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
135 }
136 dest_offset = fd.offset();
137 }
138
139 // Same as above but for "optional" offsets that might not be present in certain JDK versions
140 static void
141 compute_optional_offset(int& dest_offset,
142 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol,
143 bool allow_super = false) {
144 fieldDescriptor fd;
145 InstanceKlass* ik = InstanceKlass::cast(klass);
146 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
147 dest_offset = fd.offset();
148 }
149 }
150
151
152 int java_lang_String::value_offset = 0;
153 int java_lang_String::hash_offset = 0;
154 int java_lang_String::coder_offset = 0;
155
156 bool java_lang_String::initialized = false;
157
158 bool java_lang_String::is_instance(oop obj) {
159 return is_instance_inlined(obj);
160 }
161
162 void java_lang_String::compute_offsets() {
163 assert(!initialized, "offsets should be initialized only once");
164
165 Klass* k = SystemDictionary::String_klass();
166 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature());
167 compute_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
168 compute_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature());
169
170 initialized = true;
171 }
172
173 class CompactStringsFixup : public FieldClosure {
174 private:
175 bool _value;
176
177 public:
178 CompactStringsFixup(bool value) : _value(value) {}
179
180 void do_field(fieldDescriptor* fd) {
181 if (fd->name() == vmSymbols::compact_strings_name()) {
182 oop mirror = fd->field_holder()->java_mirror();
183 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
184 assert(mirror != NULL, "String must have mirror already");
185 mirror->bool_field_put(fd->offset(), _value);
186 }
187 }
188 };
189
190 void java_lang_String::set_compact_strings(bool value) {
191 CompactStringsFixup fix(value);
192 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
193 }
194
195 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
196 assert(initialized, "Must be initialized");
197 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
198
199 // Create the String object first, so there's a chance that the String
200 // and the char array it points to end up in the same cache line.
201 oop obj;
202 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
203
204 // Create the char array. The String object must be handlized here
205 // because GC can happen as a result of the allocation attempt.
206 Handle h_obj(THREAD, obj);
207 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
208 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
209
210 // Point the String at the char array
211 obj = h_obj();
212 set_value(obj, buffer);
213 // No need to zero the offset, allocation zero'ed the entire String object
214 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
215 return h_obj;
216 }
217
218 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
219 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
220 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
221 typeArrayOop buffer = value(h_obj());
222 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
223 if (is_latin1) {
224 for (int index = 0; index < length; index++) {
225 buffer->byte_at_put(index, (jbyte)unicode[index]);
226 }
227 } else {
228 for (int index = 0; index < length; index++) {
229 buffer->char_at_put(index, unicode[index]);
230 }
231 }
232
233 #ifdef ASSERT
234 {
235 ResourceMark rm;
236 char* expected = UNICODE::as_utf8(unicode, length);
237 char* actual = as_utf8_string(h_obj());
238 if (strcmp(expected, actual) != 0) {
239 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
240 ShouldNotReachHere();
241 }
242 }
243 #endif
244
245 return h_obj;
246 }
247
248 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
249 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
250 return h_obj();
251 }
252
253 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
254 if (utf8_str == NULL) {
255 return Handle();
256 }
257 bool has_multibyte, is_latin1;
258 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
259 if (!CompactStrings) {
260 has_multibyte = true;
261 is_latin1 = false;
262 }
263
264 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
265 if (length > 0) {
266 if (!has_multibyte) {
267 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
268 } else if (is_latin1) {
269 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
270 } else {
271 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
272 }
273 }
274
275 #ifdef ASSERT
276 // This check is too strict because the input string is not necessarily valid UTF8.
277 // For example, it may be created with arbitrary content via jni_NewStringUTF.
278 /*
279 {
280 ResourceMark rm;
281 const char* expected = utf8_str;
282 char* actual = as_utf8_string(h_obj());
283 if (strcmp(expected, actual) != 0) {
284 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
285 ShouldNotReachHere();
286 }
287 }
288 */
289 #endif
290
291 return h_obj;
292 }
293
294 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
295 Handle h_obj = create_from_str(utf8_str, CHECK_0);
296 return h_obj();
297 }
298
299 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
300 const char* utf8_str = (char*)symbol->bytes();
301 int utf8_len = symbol->utf8_length();
302
303 bool has_multibyte, is_latin1;
304 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
305 if (!CompactStrings) {
306 has_multibyte = true;
307 is_latin1 = false;
308 }
309
310 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
311 if (length > 0) {
312 if (!has_multibyte) {
313 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, 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 {
323 ResourceMark rm;
324 const char* expected = symbol->as_utf8();
325 char* actual = as_utf8_string(h_obj());
326 if (strncmp(expected, actual, utf8_len) != 0) {
327 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
328 ShouldNotReachHere();
329 }
330 }
331 #endif
332
333 return h_obj;
334 }
335
336 // Converts a C string to a Java String based on current encoding
337 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
338 assert(str != NULL, "bad arguments");
339
340 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
341 static to_java_string_fn_t _to_java_string_fn = NULL;
342
343 if (_to_java_string_fn == NULL) {
344 void *lib_handle = os::native_java_library();
345 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
346 if (_to_java_string_fn == NULL) {
347 fatal("NewStringPlatform missing");
348 }
349 }
350
351 jstring js = NULL;
352 { JavaThread* thread = (JavaThread*)THREAD;
353 assert(thread->is_Java_thread(), "must be java thread");
354 HandleMark hm(thread);
355 ThreadToNativeFromVM ttn(thread);
356 js = (_to_java_string_fn)(thread->jni_environment(), str);
357 }
358 return Handle(THREAD, JNIHandles::resolve(js));
359 }
360
361 // Converts a Java String to a native C string that can be used for
362 // native OS calls.
363 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
364 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
365 static to_platform_string_fn_t _to_platform_string_fn = NULL;
366
367 if (_to_platform_string_fn == NULL) {
368 void *lib_handle = os::native_java_library();
369 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
370 if (_to_platform_string_fn == NULL) {
371 fatal("GetStringPlatformChars missing");
372 }
373 }
374
375 char *native_platform_string;
376 { JavaThread* thread = (JavaThread*)THREAD;
377 assert(thread->is_Java_thread(), "must be java thread");
378 JNIEnv *env = thread->jni_environment();
379 jstring js = (jstring) JNIHandles::make_local(env, java_string());
380 bool is_copy;
381 HandleMark hm(thread);
382 ThreadToNativeFromVM ttn(thread);
383 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
384 assert(is_copy == JNI_TRUE, "is_copy value changed");
385 JNIHandles::destroy_local(js);
386 }
387 return native_platform_string;
388 }
389
390 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
391 oop obj = java_string();
392 // Typical usage is to convert all '/' to '.' in string.
393 typeArrayOop value = java_lang_String::value(obj);
394 int length = java_lang_String::length(obj);
395 bool is_latin1 = java_lang_String::is_latin1(obj);
396
397 // First check if any from_char exist
398 int index; // Declared outside, used later
399 for (index = 0; index < length; index++) {
400 jchar c = !is_latin1 ? value->char_at(index) :
401 ((jchar) value->byte_at(index)) & 0xff;
402 if (c == from_char) {
403 break;
404 }
405 }
406 if (index == length) {
407 // No from_char, so do not copy.
408 return java_string;
409 }
410
411 // Check if result string will be latin1
412 bool to_is_latin1 = false;
413
414 // Replacement char must be latin1
415 if (CompactStrings && UNICODE::is_latin1(to_char)) {
416 if (is_latin1) {
417 // Source string is latin1 as well
418 to_is_latin1 = true;
419 } else if (!UNICODE::is_latin1(from_char)) {
420 // We are replacing an UTF16 char. Scan string to
421 // check if result can be latin1 encoded.
422 to_is_latin1 = true;
423 for (index = 0; index < length; index++) {
424 jchar c = value->char_at(index);
425 if (c != from_char && !UNICODE::is_latin1(c)) {
426 to_is_latin1 = false;
427 break;
428 }
429 }
430 }
431 }
432
433 // Create new UNICODE (or byte) buffer. Must handlize value because GC
434 // may happen during String and char array creation.
435 typeArrayHandle h_value(THREAD, value);
436 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
437 typeArrayOop from_buffer = h_value();
438 typeArrayOop to_buffer = java_lang_String::value(string());
439
440 // Copy contents
441 for (index = 0; index < length; index++) {
442 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
443 ((jchar) from_buffer->byte_at(index)) & 0xff;
444 if (c == from_char) {
445 c = to_char;
446 }
447 if (!to_is_latin1) {
448 to_buffer->char_at_put(index, c);
449 } else {
450 to_buffer->byte_at_put(index, (jbyte) c);
451 }
452 }
453 return string;
454 }
455
456 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
457 typeArrayOop value = java_lang_String::value(java_string);
458 length = java_lang_String::length(java_string);
459 bool is_latin1 = java_lang_String::is_latin1(java_string);
460
461 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
462 if (result != NULL) {
463 if (!is_latin1) {
464 for (int index = 0; index < length; index++) {
465 result[index] = value->char_at(index);
466 }
467 } else {
468 for (int index = 0; index < length; index++) {
469 result[index] = ((jchar) value->byte_at(index)) & 0xff;
470 }
471 }
472 } else {
473 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
474 }
475 return result;
476 }
477
478 unsigned int java_lang_String::hash_code(oop java_string) {
479 int length = java_lang_String::length(java_string);
480 // Zero length string will hash to zero with String.hashCode() function.
481 if (length == 0) return 0;
482
483 typeArrayOop value = java_lang_String::value(java_string);
484 bool is_latin1 = java_lang_String::is_latin1(java_string);
485
486 if (is_latin1) {
487 return java_lang_String::hash_code(value->byte_at_addr(0), length);
488 } else {
489 return java_lang_String::hash_code(value->char_at_addr(0), length);
490 }
491 }
492
493 char* java_lang_String::as_quoted_ascii(oop java_string) {
494 typeArrayOop value = java_lang_String::value(java_string);
495 int length = java_lang_String::length(java_string);
496 bool is_latin1 = java_lang_String::is_latin1(java_string);
497
498 if (length == 0) return NULL;
499
500 char* result;
501 int result_length;
502 if (!is_latin1) {
503 jchar* base = value->char_at_addr(0);
504 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
505 result = NEW_RESOURCE_ARRAY(char, result_length);
506 UNICODE::as_quoted_ascii(base, length, result, result_length);
507 } else {
508 jbyte* base = value->byte_at_addr(0);
509 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
510 result = NEW_RESOURCE_ARRAY(char, result_length);
511 UNICODE::as_quoted_ascii(base, length, result, result_length);
512 }
513 assert(result_length >= length + 1, "must not be shorter");
514 assert(result_length == (int)strlen(result) + 1, "must match");
515 return result;
516 }
517
518 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
519 typeArrayOop value = java_lang_String::value(java_string);
520 int length = java_lang_String::length(java_string);
521 bool is_latin1 = java_lang_String::is_latin1(java_string);
522 if (!is_latin1) {
523 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
524 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
525 return sym;
526 } else {
527 ResourceMark rm;
528 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
529 const char* base = UNICODE::as_utf8(position, length);
530 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
531 return sym;
532 }
533 }
534
535 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
536 typeArrayOop value = java_lang_String::value(java_string);
537 int length = java_lang_String::length(java_string);
538 bool is_latin1 = java_lang_String::is_latin1(java_string);
539 if (!is_latin1) {
540 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
541 return SymbolTable::probe_unicode(base, length);
542 } else {
543 ResourceMark rm;
544 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
545 const char* base = UNICODE::as_utf8(position, length);
546 return SymbolTable::probe(base, length);
547 }
548 }
549
550 int java_lang_String::utf8_length(oop java_string) {
551 typeArrayOop value = java_lang_String::value(java_string);
552 int length = java_lang_String::length(java_string);
553 bool is_latin1 = java_lang_String::is_latin1(java_string);
554 if (length == 0) {
555 return 0;
556 }
557 if (!is_latin1) {
558 return UNICODE::utf8_length(value->char_at_addr(0), length);
559 } else {
560 return UNICODE::utf8_length(value->byte_at_addr(0), length);
561 }
562 }
563
564 char* java_lang_String::as_utf8_string(oop java_string) {
565 typeArrayOop value = java_lang_String::value(java_string);
566 int length = java_lang_String::length(java_string);
567 bool is_latin1 = java_lang_String::is_latin1(java_string);
568 if (!is_latin1) {
569 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
570 return UNICODE::as_utf8(position, length);
571 } else {
572 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
573 return UNICODE::as_utf8(position, length);
574 }
575 }
576
577 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
578 typeArrayOop value = java_lang_String::value(java_string);
579 int length = java_lang_String::length(java_string);
580 bool is_latin1 = java_lang_String::is_latin1(java_string);
581 if (!is_latin1) {
582 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
583 return UNICODE::as_utf8(position, length, buf, buflen);
584 } else {
585 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
586 return UNICODE::as_utf8(position, length, buf, buflen);
587 }
588 }
589
590 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
591 typeArrayOop value = java_lang_String::value(java_string);
592 int length = java_lang_String::length(java_string);
593 assert(start + len <= length, "just checking");
594 bool is_latin1 = java_lang_String::is_latin1(java_string);
595 if (!is_latin1) {
596 jchar* position = value->char_at_addr(start);
597 return UNICODE::as_utf8(position, len);
598 } else {
599 jbyte* position = value->byte_at_addr(start);
600 return UNICODE::as_utf8(position, len);
601 }
602 }
603
604 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
605 typeArrayOop value = java_lang_String::value(java_string);
606 int length = java_lang_String::length(java_string);
607 assert(start + len <= length, "just checking");
608 bool is_latin1 = java_lang_String::is_latin1(java_string);
609 if (!is_latin1) {
610 jchar* position = value->char_at_addr(start);
611 return UNICODE::as_utf8(position, len, buf, buflen);
612 } else {
613 jbyte* position = value->byte_at_addr(start);
614 return UNICODE::as_utf8(position, len, buf, buflen);
615 }
616 }
617
618 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
619 assert(java_string->klass() == SystemDictionary::String_klass(),
620 "must be java_string");
621 typeArrayOop value = java_lang_String::value(java_string);
622 int length = java_lang_String::length(java_string);
623 if (length != len) {
624 return false;
625 }
626 bool is_latin1 = java_lang_String::is_latin1(java_string);
627 if (!is_latin1) {
628 for (int i = 0; i < len; i++) {
629 if (value->char_at(i) != chars[i]) {
630 return false;
631 }
632 }
633 } else {
634 for (int i = 0; i < len; i++) {
635 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
636 return false;
637 }
638 }
639 }
640 return true;
641 }
642
643 bool java_lang_String::equals(oop str1, oop str2) {
644 assert(str1->klass() == SystemDictionary::String_klass(),
645 "must be java String");
646 assert(str2->klass() == SystemDictionary::String_klass(),
647 "must be java String");
648 typeArrayOop value1 = java_lang_String::value(str1);
649 int length1 = java_lang_String::length(str1);
650 bool is_latin1 = java_lang_String::is_latin1(str1);
651 typeArrayOop value2 = java_lang_String::value(str2);
652 int length2 = java_lang_String::length(str2);
653 bool is_latin2 = java_lang_String::is_latin1(str2);
654
655 if ((length1 != length2) || (is_latin1 != is_latin2)) {
656 // Strings of different size or with different
657 // coders are never equal.
658 return false;
659 }
660 int blength1 = value1->length();
661 for (int i = 0; i < value1->length(); i++) {
662 if (value1->byte_at(i) != value2->byte_at(i)) {
663 return false;
664 }
665 }
666 return true;
667 }
668
669 void java_lang_String::print(oop java_string, outputStream* st) {
670 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
671 typeArrayOop value = java_lang_String::value(java_string);
672
673 if (value == NULL) {
674 // This can happen if, e.g., printing a String
675 // object before its initializer has been called
676 st->print("NULL");
677 return;
678 }
679
680 int length = java_lang_String::length(java_string);
681 bool is_latin1 = java_lang_String::is_latin1(java_string);
682
683 st->print("\"");
684 for (int index = 0; index < length; index++) {
685 st->print("%c", (!is_latin1) ? value->char_at(index) :
686 ((jchar) value->byte_at(index)) & 0xff );
687 }
688 st->print("\"");
689 }
690
691
692 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
693 assert(mirror.not_null() && fd->is_static(), "just checking");
694 if (fd->has_initial_value()) {
695 BasicType t = fd->field_type();
696 switch (t) {
697 case T_BYTE:
698 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
699 break;
700 case T_BOOLEAN:
701 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
702 break;
703 case T_CHAR:
704 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
705 break;
706 case T_SHORT:
707 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
708 break;
709 case T_INT:
710 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
711 break;
712 case T_FLOAT:
713 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
714 break;
715 case T_DOUBLE:
716 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
717 break;
718 case T_LONG:
719 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
720 break;
721 case T_OBJECT:
722 {
723 #ifdef ASSERT
724 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
725 assert(fd->signature() == sym, "just checking");
726 #endif
727 oop string = fd->string_initial_value(CHECK);
728 mirror()->obj_field_put(fd->offset(), string);
729 }
730 break;
731 default:
732 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
733 "Illegal ConstantValue attribute in class file");
734 }
735 }
736 }
737
738
739 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
740 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
741
742 // If the offset was read from the shared archive, it was fixed up already
743 if (!k->is_shared()) {
744 if (k->is_instance_klass()) {
745 // During bootstrap, java.lang.Class wasn't loaded so static field
746 // offsets were computed without the size added it. Go back and
747 // update all the static field offsets to included the size.
748 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
749 if (fs.access_flags().is_static()) {
750 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
751 fs.set_offset(real_offset);
752 }
753 }
754 }
755 }
756 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
757 }
758
759 void java_lang_Class::initialize_mirror_fields(Klass* k,
760 Handle mirror,
761 Handle protection_domain,
762 TRAPS) {
763 // Allocate a simple java object for a lock.
764 // This needs to be a java object because during class initialization
765 // it can be held across a java call.
766 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
767 set_init_lock(mirror(), r);
768
769 // Set protection domain also
770 set_protection_domain(mirror(), protection_domain());
771
772 // Initialize static fields
773 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
774 }
775
776 // Set the java.lang.Module module field in the java_lang_Class mirror
777 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
778 if (module.is_null()) {
779 // During startup, the module may be NULL only if java.base has not been defined yet.
780 // Put the class on the fixup_module_list to patch later when the java.lang.Module
781 // for java.base is known.
782 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization");
783
784 bool javabase_was_defined = false;
785 {
786 MutexLocker m1(Module_lock, THREAD);
787 // Keep list of classes needing java.base module fixup
788 if (!ModuleEntryTable::javabase_defined()) {
789 if (fixup_module_field_list() == NULL) {
790 GrowableArray<Klass*>* list =
791 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
792 set_fixup_module_field_list(list);
793 }
794 k->class_loader_data()->inc_keep_alive();
795 fixup_module_field_list()->push(k);
796 } else {
797 javabase_was_defined = true;
798 }
799 }
800
801 // If java.base was already defined then patch this particular class with java.base.
802 if (javabase_was_defined) {
803 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
804 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
805 "Setting class module field, " JAVA_BASE_NAME " should be defined");
806 Handle javabase_handle(THREAD, JNIHandles::resolve(javabase_entry->module()));
807 set_module(mirror(), javabase_handle());
808 }
809 } else {
810 assert(Universe::is_module_initialized() ||
811 (ModuleEntryTable::javabase_defined() &&
812 (module() == JNIHandles::resolve(ModuleEntryTable::javabase_moduleEntry()->module()))),
813 "Incorrect java.lang.Module specification while creating mirror");
814 set_module(mirror(), module());
815 }
816 }
817
818 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
819 Handle module, Handle protection_domain, TRAPS) {
820 assert(k->java_mirror() == NULL, "should only assign mirror once");
821 // Use this moment of initialization to cache modifier_flags also,
822 // to support Class.getModifiers(). Instance classes recalculate
823 // the cached flags after the class file is parsed, but before the
824 // class is put into the system dictionary.
825 int computed_modifiers = k->compute_modifier_flags(CHECK);
826 k->set_modifier_flags(computed_modifiers);
827 // Class_klass has to be loaded because it is used to allocate
828 // the mirror.
829 if (SystemDictionary::Class_klass_loaded()) {
830 // Allocate mirror (java.lang.Class instance)
831 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
832 Handle mirror(THREAD, mirror_oop);
833
834 // Setup indirection from mirror->klass
835 if (k != NULL) {
836 java_lang_Class::set_klass(mirror(), k);
837 }
838
839 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
840 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
841
842 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
843
844 // It might also have a component mirror. This mirror must already exist.
845 if (k->is_array_klass()) {
846 oop comp_mirror;
847 if (k->is_typeArray_klass()) {
848 BasicType type = TypeArrayKlass::cast(k)->element_type();
849 comp_mirror = Universe::java_mirror(type);
850 } else {
851 assert(k->is_objArray_klass(), "Must be");
852 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
853 assert(element_klass != NULL, "Must have an element klass");
854 comp_mirror = element_klass->java_mirror();
855 }
856 assert(comp_mirror != NULL, "must have a mirror");
857
858 // Two-way link between the array klass and its component mirror:
859 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
860 set_component_mirror(mirror(), comp_mirror);
861 set_array_klass(comp_mirror, k);
862 } else {
863 assert(k->is_instance_klass(), "Must be");
864
865 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
866 if (HAS_PENDING_EXCEPTION) {
867 // If any of the fields throws an exception like OOM remove the klass field
868 // from the mirror so GC doesn't follow it after the klass has been deallocated.
869 // This mirror looks like a primitive type, which logically it is because it
870 // it represents no class.
871 java_lang_Class::set_klass(mirror(), NULL);
872 return;
873 }
874 }
875
876 // set the classLoader field in the java_lang_Class instance
877 assert(class_loader() == k->class_loader(), "should be same");
878 set_class_loader(mirror(), class_loader());
879
880 // set the module field in the java_lang_Class instance
881 set_mirror_module_field(k, mirror, module, THREAD);
882
883 // Setup indirection from klass->mirror last
884 // after any exceptions can happen during allocations.
885 if (k != NULL) {
886 k->set_java_mirror(mirror());
887 }
888 } else {
889 if (fixup_mirror_list() == NULL) {
890 GrowableArray<Klass*>* list =
891 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
892 set_fixup_mirror_list(list);
893 }
894 fixup_mirror_list()->push(k);
895 }
896 }
897
898 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
899 assert(_module_offset != 0, "must have been computed already");
900 java_lang_Class::set_module(k->java_mirror(), module());
901 }
902
903 int java_lang_Class::oop_size(oop java_class) {
904 assert(_oop_size_offset != 0, "must be set");
905 int size = java_class->int_field(_oop_size_offset);
906 assert(size > 0, "Oop size must be greater than zero, not %d", size);
907 return size;
908 }
909
910 void java_lang_Class::set_oop_size(oop java_class, int size) {
911 assert(_oop_size_offset != 0, "must be set");
912 assert(size > 0, "Oop size must be greater than zero, not %d", size);
913 java_class->int_field_put(_oop_size_offset, size);
914 }
915
916 int java_lang_Class::static_oop_field_count(oop java_class) {
917 assert(_static_oop_field_count_offset != 0, "must be set");
918 return java_class->int_field(_static_oop_field_count_offset);
919 }
920 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
921 assert(_static_oop_field_count_offset != 0, "must be set");
922 java_class->int_field_put(_static_oop_field_count_offset, size);
923 }
924
925 oop java_lang_Class::protection_domain(oop java_class) {
926 assert(_protection_domain_offset != 0, "must be set");
927 return java_class->obj_field(_protection_domain_offset);
928 }
929 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
930 assert(_protection_domain_offset != 0, "must be set");
931 java_class->obj_field_put(_protection_domain_offset, pd);
932 }
933
934 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
935 assert(_component_mirror_offset != 0, "must be set");
936 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
937 }
938 oop java_lang_Class::component_mirror(oop java_class) {
939 assert(_component_mirror_offset != 0, "must be set");
940 return java_class->obj_field(_component_mirror_offset);
941 }
942
943 oop java_lang_Class::init_lock(oop java_class) {
944 assert(_init_lock_offset != 0, "must be set");
945 return java_class->obj_field(_init_lock_offset);
946 }
947 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
948 assert(_init_lock_offset != 0, "must be set");
949 java_class->obj_field_put(_init_lock_offset, init_lock);
950 }
951
952 objArrayOop java_lang_Class::signers(oop java_class) {
953 assert(_signers_offset != 0, "must be set");
954 return (objArrayOop)java_class->obj_field(_signers_offset);
955 }
956 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
957 assert(_signers_offset != 0, "must be set");
958 java_class->obj_field_put(_signers_offset, (oop)signers);
959 }
960
961
962 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
963 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
964 if (_class_loader_offset != 0) {
965 java_class->obj_field_put(_class_loader_offset, loader);
966 }
967 }
968
969 oop java_lang_Class::class_loader(oop java_class) {
970 assert(_class_loader_offset != 0, "must be set");
971 return java_class->obj_field(_class_loader_offset);
972 }
973
974 oop java_lang_Class::module(oop java_class) {
975 assert(_module_offset != 0, "must be set");
976 return java_class->obj_field(_module_offset);
977 }
978
979 void java_lang_Class::set_module(oop java_class, oop module) {
980 assert(_module_offset != 0, "must be set");
981 java_class->obj_field_put(_module_offset, module);
982 }
983
984 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
985 // This should be improved by adding a field at the Java level or by
986 // introducing a new VM klass (see comment in ClassFileParser)
987 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
988 if (type != T_VOID) {
989 Klass* aklass = Universe::typeArrayKlassObj(type);
990 assert(aklass != NULL, "correct bootstrap");
991 set_array_klass(java_class, aklass);
992 }
993 #ifdef ASSERT
994 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
995 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
996 #endif
997 return java_class;
998 }
999
1000
1001 Klass* java_lang_Class::as_Klass(oop java_class) {
1002 //%note memory_2
1003 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1004 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1005 assert(k == NULL || k->is_klass(), "type check");
1006 return k;
1007 }
1008
1009
1010 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1011 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1012 java_class->metadata_field_put(_klass_offset, klass);
1013 }
1014
1015
1016 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1017 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1018 Symbol* name = NULL;
1019 bool is_instance = false;
1020 if (is_primitive(java_class)) {
1021 name = vmSymbols::type_signature(primitive_type(java_class));
1022 } else {
1023 Klass* k = as_Klass(java_class);
1024 is_instance = k->is_instance_klass();
1025 name = k->name();
1026 }
1027 if (name == NULL) {
1028 st->print("<null>");
1029 return;
1030 }
1031 if (is_instance) st->print("L");
1032 st->write((char*) name->base(), (int) name->utf8_length());
1033 if (is_instance) st->print(";");
1034 }
1035
1036 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1037 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1038 Symbol* name;
1039 if (is_primitive(java_class)) {
1040 name = vmSymbols::type_signature(primitive_type(java_class));
1041 // Because this can create a new symbol, the caller has to decrement
1042 // the refcount, so make adjustment here and below for symbols returned
1043 // that are not created or incremented due to a successful lookup.
1044 name->increment_refcount();
1045 } else {
1046 Klass* k = as_Klass(java_class);
1047 if (!k->is_instance_klass()) {
1048 name = k->name();
1049 name->increment_refcount();
1050 } else {
1051 ResourceMark rm;
1052 const char* sigstr = k->signature_name();
1053 int siglen = (int) strlen(sigstr);
1054 if (!intern_if_not_found) {
1055 name = SymbolTable::probe(sigstr, siglen);
1056 } else {
1057 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1058 }
1059 }
1060 }
1061 return name;
1062 }
1063
1064 // Returns the Java name for this Java mirror (Resource allocated)
1065 // See Klass::external_name().
1066 // For primitive type Java mirrors, its type name is returned.
1067 const char* java_lang_Class::as_external_name(oop java_class) {
1068 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1069 const char* name = NULL;
1070 if (is_primitive(java_class)) {
1071 name = type2name(primitive_type(java_class));
1072 } else {
1073 name = as_Klass(java_class)->external_name();
1074 }
1075 if (name == NULL) {
1076 name = "<null>";
1077 }
1078 return name;
1079 }
1080
1081 Klass* java_lang_Class::array_klass(oop java_class) {
1082 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1083 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1084 return k;
1085 }
1086
1087
1088 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
1089 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1090 java_class->metadata_field_put(_array_klass_offset, klass);
1091 }
1092
1093
1094 bool java_lang_Class::is_primitive(oop java_class) {
1095 // should assert:
1096 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1097 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1098
1099 #ifdef ASSERT
1100 if (is_primitive) {
1101 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1102 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1103 "Should be either the T_VOID primitive or a java primitive");
1104 }
1105 #endif
1106
1107 return is_primitive;
1108 }
1109
1110
1111 BasicType java_lang_Class::primitive_type(oop java_class) {
1112 assert(java_lang_Class::is_primitive(java_class), "just checking");
1113 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1114 BasicType type = T_VOID;
1115 if (ak != NULL) {
1116 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1117 type = ArrayKlass::cast(ak)->element_type();
1118 } else {
1119 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1120 }
1121 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1122 return type;
1123 }
1124
1125 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1126 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1127 if (is_primitive(java_class)) {
1128 if (reference_klass != NULL)
1129 (*reference_klass) = NULL;
1130 return primitive_type(java_class);
1131 } else {
1132 if (reference_klass != NULL)
1133 (*reference_klass) = as_Klass(java_class);
1134 return T_OBJECT;
1135 }
1136 }
1137
1138
1139 oop java_lang_Class::primitive_mirror(BasicType t) {
1140 oop mirror = Universe::java_mirror(t);
1141 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1142 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1143 return mirror;
1144 }
1145
1146 bool java_lang_Class::offsets_computed = false;
1147 int java_lang_Class::classRedefinedCount_offset = -1;
1148
1149 void java_lang_Class::compute_offsets() {
1150 assert(!offsets_computed, "offsets should be initialized only once");
1151 offsets_computed = true;
1152
1153 Klass* k = SystemDictionary::Class_klass();
1154 // The classRedefinedCount field is only present starting in 1.5,
1155 // so don't go fatal.
1156 compute_optional_offset(classRedefinedCount_offset,
1157 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
1158
1159 // Needs to be optional because the old build runs Queens during bootstrapping
1160 // and jdk8-9 doesn't have coordinated pushes yet.
1161 compute_optional_offset(_class_loader_offset,
1162 k, vmSymbols::classLoader_name(),
1163 vmSymbols::classloader_signature());
1164
1165 compute_offset(_component_mirror_offset,
1166 k, vmSymbols::componentType_name(),
1167 vmSymbols::class_signature());
1168
1169 compute_offset(_module_offset,
1170 k, vmSymbols::module_name(),
1171 vmSymbols::module_signature());
1172
1173 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1174 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1175 // GC treats them the same.
1176 _init_lock_offset = _component_mirror_offset;
1177
1178 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1179 }
1180
1181 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1182 if (classRedefinedCount_offset == -1) {
1183 // If we don't have an offset for it then just return -1 as a marker.
1184 return -1;
1185 }
1186
1187 return the_class_mirror->int_field(classRedefinedCount_offset);
1188 }
1189
1190 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1191 if (classRedefinedCount_offset == -1) {
1192 // If we don't have an offset for it then nothing to set.
1193 return;
1194 }
1195
1196 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1197 }
1198
1199
1200 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1201 // platform thread structure, and a eetop offset which was used for thread
1202 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1203 // merged, so in the HotSpot VM we just use the eetop field for the thread
1204 // instead of the privateInfo_offset.
1205 //
1206 // Note: The stackSize field is only present starting in 1.4.
1207
1208 int java_lang_Thread::_name_offset = 0;
1209 int java_lang_Thread::_group_offset = 0;
1210 int java_lang_Thread::_contextClassLoader_offset = 0;
1211 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1212 int java_lang_Thread::_priority_offset = 0;
1213 int java_lang_Thread::_eetop_offset = 0;
1214 int java_lang_Thread::_daemon_offset = 0;
1215 int java_lang_Thread::_stillborn_offset = 0;
1216 int java_lang_Thread::_stackSize_offset = 0;
1217 int java_lang_Thread::_tid_offset = 0;
1218 int java_lang_Thread::_thread_status_offset = 0;
1219 int java_lang_Thread::_park_blocker_offset = 0;
1220 int java_lang_Thread::_park_event_offset = 0 ;
1221
1222
1223 void java_lang_Thread::compute_offsets() {
1224 assert(_group_offset == 0, "offsets should be initialized only once");
1225
1226 Klass* k = SystemDictionary::Thread_klass();
1227 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1228 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
1229 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
1230 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
1231 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
1232 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1233 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
1234 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
1235 // The stackSize field is only present starting in 1.4, so don't go fatal.
1236 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
1237 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
1238 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
1239 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
1240 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
1241 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
1242 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
1243 vmSymbols::long_signature());
1244 }
1245
1246
1247 JavaThread* java_lang_Thread::thread(oop java_thread) {
1248 return (JavaThread*)java_thread->address_field(_eetop_offset);
1249 }
1250
1251
1252 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1253 java_thread->address_field_put(_eetop_offset, (address)thread);
1254 }
1255
1256
1257 oop java_lang_Thread::name(oop java_thread) {
1258 return java_thread->obj_field(_name_offset);
1259 }
1260
1261
1262 void java_lang_Thread::set_name(oop java_thread, oop name) {
1263 java_thread->obj_field_put(_name_offset, name);
1264 }
1265
1266
1267 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1268 return (ThreadPriority)java_thread->int_field(_priority_offset);
1269 }
1270
1271
1272 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1273 java_thread->int_field_put(_priority_offset, priority);
1274 }
1275
1276
1277 oop java_lang_Thread::threadGroup(oop java_thread) {
1278 return java_thread->obj_field(_group_offset);
1279 }
1280
1281
1282 bool java_lang_Thread::is_stillborn(oop java_thread) {
1283 return java_thread->bool_field(_stillborn_offset) != 0;
1284 }
1285
1286
1287 // We never have reason to turn the stillborn bit off
1288 void java_lang_Thread::set_stillborn(oop java_thread) {
1289 java_thread->bool_field_put(_stillborn_offset, true);
1290 }
1291
1292
1293 bool java_lang_Thread::is_alive(oop java_thread) {
1294 JavaThread* thr = java_lang_Thread::thread(java_thread);
1295 return (thr != NULL);
1296 }
1297
1298
1299 bool java_lang_Thread::is_daemon(oop java_thread) {
1300 return java_thread->bool_field(_daemon_offset) != 0;
1301 }
1302
1303
1304 void java_lang_Thread::set_daemon(oop java_thread) {
1305 java_thread->bool_field_put(_daemon_offset, true);
1306 }
1307
1308 oop java_lang_Thread::context_class_loader(oop java_thread) {
1309 return java_thread->obj_field(_contextClassLoader_offset);
1310 }
1311
1312 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1313 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1314 }
1315
1316
1317 jlong java_lang_Thread::stackSize(oop java_thread) {
1318 if (_stackSize_offset > 0) {
1319 return java_thread->long_field(_stackSize_offset);
1320 } else {
1321 return 0;
1322 }
1323 }
1324
1325 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1326 void java_lang_Thread::set_thread_status(oop java_thread,
1327 java_lang_Thread::ThreadStatus status) {
1328 // The threadStatus is only present starting in 1.5
1329 if (_thread_status_offset > 0) {
1330 java_thread->int_field_put(_thread_status_offset, status);
1331 }
1332 }
1333
1334 // Read thread status value from threadStatus field in java.lang.Thread java class.
1335 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1336 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1337 JavaThread::current()->thread_state() == _thread_in_vm,
1338 "Java Thread is not running in vm");
1339 // The threadStatus is only present starting in 1.5
1340 if (_thread_status_offset > 0) {
1341 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1342 } else {
1343 // All we can easily figure out is if it is alive, but that is
1344 // enough info for a valid unknown status.
1345 // These aren't restricted to valid set ThreadStatus values, so
1346 // use JVMTI values and cast.
1347 JavaThread* thr = java_lang_Thread::thread(java_thread);
1348 if (thr == NULL) {
1349 // the thread hasn't run yet or is in the process of exiting
1350 return NEW;
1351 }
1352 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1353 }
1354 }
1355
1356
1357 jlong java_lang_Thread::thread_id(oop java_thread) {
1358 // The thread ID field is only present starting in 1.5
1359 if (_tid_offset > 0) {
1360 return java_thread->long_field(_tid_offset);
1361 } else {
1362 return 0;
1363 }
1364 }
1365
1366 oop java_lang_Thread::park_blocker(oop java_thread) {
1367 assert(JDK_Version::current().supports_thread_park_blocker() &&
1368 _park_blocker_offset != 0, "Must support parkBlocker field");
1369
1370 if (_park_blocker_offset > 0) {
1371 return java_thread->obj_field(_park_blocker_offset);
1372 }
1373
1374 return NULL;
1375 }
1376
1377 jlong java_lang_Thread::park_event(oop java_thread) {
1378 if (_park_event_offset > 0) {
1379 return java_thread->long_field(_park_event_offset);
1380 }
1381 return 0;
1382 }
1383
1384 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1385 if (_park_event_offset > 0) {
1386 java_thread->long_field_put(_park_event_offset, ptr);
1387 return true;
1388 }
1389 return false;
1390 }
1391
1392
1393 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1394 assert(_thread_status_offset != 0, "Must have thread status");
1395 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1396 switch (status) {
1397 case NEW : return "NEW";
1398 case RUNNABLE : return "RUNNABLE";
1399 case SLEEPING : return "TIMED_WAITING (sleeping)";
1400 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1401 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1402 case PARKED : return "WAITING (parking)";
1403 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1404 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1405 case TERMINATED : return "TERMINATED";
1406 default : return "UNKNOWN";
1407 };
1408 }
1409 int java_lang_ThreadGroup::_parent_offset = 0;
1410 int java_lang_ThreadGroup::_name_offset = 0;
1411 int java_lang_ThreadGroup::_threads_offset = 0;
1412 int java_lang_ThreadGroup::_groups_offset = 0;
1413 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1414 int java_lang_ThreadGroup::_destroyed_offset = 0;
1415 int java_lang_ThreadGroup::_daemon_offset = 0;
1416 int java_lang_ThreadGroup::_nthreads_offset = 0;
1417 int java_lang_ThreadGroup::_ngroups_offset = 0;
1418
1419 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1420 assert(java_thread_group->is_oop(), "thread group must be oop");
1421 return java_thread_group->obj_field(_parent_offset);
1422 }
1423
1424 // ("name as oop" accessor is not necessary)
1425
1426 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1427 oop name = java_thread_group->obj_field(_name_offset);
1428 // ThreadGroup.name can be null
1429 if (name != NULL) {
1430 return java_lang_String::as_utf8_string(name);
1431 }
1432 return NULL;
1433 }
1434
1435 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1436 assert(java_thread_group->is_oop(), "thread group must be oop");
1437 return java_thread_group->int_field(_nthreads_offset);
1438 }
1439
1440 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1441 oop threads = java_thread_group->obj_field(_threads_offset);
1442 assert(threads != NULL, "threadgroups should have threads");
1443 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1444 return objArrayOop(threads);
1445 }
1446
1447 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1448 assert(java_thread_group->is_oop(), "thread group must be oop");
1449 return java_thread_group->int_field(_ngroups_offset);
1450 }
1451
1452 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1453 oop groups = java_thread_group->obj_field(_groups_offset);
1454 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1455 return objArrayOop(groups);
1456 }
1457
1458 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1459 assert(java_thread_group->is_oop(), "thread group must be oop");
1460 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1461 }
1462
1463 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1464 assert(java_thread_group->is_oop(), "thread group must be oop");
1465 return java_thread_group->bool_field(_destroyed_offset) != 0;
1466 }
1467
1468 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1469 assert(java_thread_group->is_oop(), "thread group must be oop");
1470 return java_thread_group->bool_field(_daemon_offset) != 0;
1471 }
1472
1473 void java_lang_ThreadGroup::compute_offsets() {
1474 assert(_parent_offset == 0, "offsets should be initialized only once");
1475
1476 Klass* k = SystemDictionary::ThreadGroup_klass();
1477
1478 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1479 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1480 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1481 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1482 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1483 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1484 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1485 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1486 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1487 }
1488
1489
1490 void java_lang_Throwable::compute_offsets() {
1491 Klass* k = SystemDictionary::Throwable_klass();
1492 compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature());
1493 }
1494
1495 oop java_lang_Throwable::unassigned_stacktrace() {
1496 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1497 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1498 if (UseCompressedOops) {
1499 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1500 } else {
1501 return oopDesc::load_decode_heap_oop((oop*)addr);
1502 }
1503 }
1504
1505 oop java_lang_Throwable::backtrace(oop throwable) {
1506 return throwable->obj_field_acquire(backtrace_offset);
1507 }
1508
1509
1510 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1511 throwable->release_obj_field_put(backtrace_offset, value);
1512 }
1513
1514 int java_lang_Throwable::depth(oop throwable) {
1515 return throwable->int_field(depth_offset);
1516 }
1517
1518 void java_lang_Throwable::set_depth(oop throwable, int value) {
1519 throwable->int_field_put(depth_offset, value);
1520 }
1521
1522 oop java_lang_Throwable::message(oop throwable) {
1523 return throwable->obj_field(detailMessage_offset);
1524 }
1525
1526
1527 // Return Symbol for detailed_message or NULL
1528 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1529 PRESERVE_EXCEPTION_MARK; // Keep original exception
1530 oop detailed_message = java_lang_Throwable::message(throwable);
1531 if (detailed_message != NULL) {
1532 return java_lang_String::as_symbol(detailed_message, THREAD);
1533 }
1534 return NULL;
1535 }
1536
1537 void java_lang_Throwable::set_message(oop throwable, oop value) {
1538 throwable->obj_field_put(detailMessage_offset, value);
1539 }
1540
1541
1542 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1543 throwable->obj_field_put(stackTrace_offset, st_element_array);
1544 }
1545
1546 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1547 set_stacktrace(throwable, NULL);
1548 }
1549
1550
1551 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1552 ResourceMark rm;
1553 Klass* k = throwable->klass();
1554 assert(k != NULL, "just checking");
1555 st->print("%s", k->external_name());
1556 oop msg = message(throwable);
1557 if (msg != NULL) {
1558 st->print(": %s", java_lang_String::as_utf8_string(msg));
1559 }
1560 }
1561
1562 // After this many redefines, the stack trace is unreliable.
1563 const int MAX_VERSION = USHRT_MAX;
1564
1565 static inline bool version_matches(Method* method, int version) {
1566 assert(version < MAX_VERSION, "version is too big");
1567 return method != NULL && (method->constants()->version() == version);
1568 }
1569
1570
1571 // This class provides a simple wrapper over the internal structure of
1572 // exception backtrace to insulate users of the backtrace from needing
1573 // to know what it looks like.
1574 class BacktraceBuilder: public StackObj {
1575 friend class BacktraceIterator;
1576 private:
1577 Handle _backtrace;
1578 objArrayOop _head;
1579 typeArrayOop _methods;
1580 typeArrayOop _bcis;
1581 objArrayOop _mirrors;
1582 typeArrayOop _names; // needed to insulate method name against redefinition
1583 int _index;
1584 NoSafepointVerifier _nsv;
1585
1586 enum {
1587 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1588 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1589 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1590 trace_names_offset = java_lang_Throwable::trace_names_offset,
1591 trace_next_offset = java_lang_Throwable::trace_next_offset,
1592 trace_size = java_lang_Throwable::trace_size,
1593 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1594 };
1595
1596 // get info out of chunks
1597 static typeArrayOop get_methods(objArrayHandle chunk) {
1598 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1599 assert(methods != NULL, "method array should be initialized in backtrace");
1600 return methods;
1601 }
1602 static typeArrayOop get_bcis(objArrayHandle chunk) {
1603 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1604 assert(bcis != NULL, "bci array should be initialized in backtrace");
1605 return bcis;
1606 }
1607 static objArrayOop get_mirrors(objArrayHandle chunk) {
1608 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1609 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1610 return mirrors;
1611 }
1612 static typeArrayOop get_names(objArrayHandle chunk) {
1613 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
1614 assert(names != NULL, "names array should be initialized in backtrace");
1615 return names;
1616 }
1617
1618 public:
1619
1620 // constructor for new backtrace
1621 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) {
1622 expand(CHECK);
1623 _backtrace = Handle(THREAD, _head);
1624 _index = 0;
1625 }
1626
1627 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
1628 _methods = get_methods(backtrace);
1629 _bcis = get_bcis(backtrace);
1630 _mirrors = get_mirrors(backtrace);
1631 _names = get_names(backtrace);
1632 assert(_methods->length() == _bcis->length() &&
1633 _methods->length() == _mirrors->length() &&
1634 _mirrors->length() == _names->length(),
1635 "method and source information arrays should match");
1636
1637 // head is the preallocated backtrace
1638 _head = backtrace();
1639 _backtrace = Handle(thread, _head);
1640 _index = 0;
1641 }
1642
1643 void expand(TRAPS) {
1644 objArrayHandle old_head(THREAD, _head);
1645 PauseNoSafepointVerifier pnsv(&_nsv);
1646
1647 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1648 objArrayHandle new_head(THREAD, head);
1649
1650 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1651 typeArrayHandle new_methods(THREAD, methods);
1652
1653 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1654 typeArrayHandle new_bcis(THREAD, bcis);
1655
1656 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1657 objArrayHandle new_mirrors(THREAD, mirrors);
1658
1659 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
1660 typeArrayHandle new_names(THREAD, names);
1661
1662 if (!old_head.is_null()) {
1663 old_head->obj_at_put(trace_next_offset, new_head());
1664 }
1665 new_head->obj_at_put(trace_methods_offset, new_methods());
1666 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1667 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1668 new_head->obj_at_put(trace_names_offset, new_names());
1669
1670 _head = new_head();
1671 _methods = new_methods();
1672 _bcis = new_bcis();
1673 _mirrors = new_mirrors();
1674 _names = new_names();
1675 _index = 0;
1676 }
1677
1678 oop backtrace() {
1679 return _backtrace();
1680 }
1681
1682 inline void push(Method* method, int bci, TRAPS) {
1683 // Smear the -1 bci to 0 since the array only holds unsigned
1684 // shorts. The later line number lookup would just smear the -1
1685 // to a 0 even if it could be recorded.
1686 if (bci == SynchronizationEntryBCI) bci = 0;
1687
1688 if (_index >= trace_chunk_size) {
1689 methodHandle mhandle(THREAD, method);
1690 expand(CHECK);
1691 method = mhandle();
1692 }
1693
1694 _methods->short_at_put(_index, method->orig_method_idnum());
1695 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
1696
1697 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
1698 // klass owning the symbols alive so their refcounts aren't decremented.
1699 Symbol* name = method->name();
1700 _names->symbol_at_put(_index, name);
1701
1702 // We need to save the mirrors in the backtrace to keep the class
1703 // from being unloaded while we still have this stack trace.
1704 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1705 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1706 _index++;
1707 }
1708
1709 };
1710
1711 struct BacktraceElement : public StackObj {
1712 int _method_id;
1713 int _bci;
1714 int _version;
1715 Symbol* _name;
1716 Handle _mirror;
1717 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
1718 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {}
1719 };
1720
1721 class BacktraceIterator : public StackObj {
1722 int _index;
1723 objArrayHandle _result;
1724 objArrayHandle _mirrors;
1725 typeArrayHandle _methods;
1726 typeArrayHandle _bcis;
1727 typeArrayHandle _names;
1728
1729 void init(objArrayHandle result, Thread* thread) {
1730 // Get method id, bci, version and mirror from chunk
1731 _result = result;
1732 if (_result.not_null()) {
1733 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
1734 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
1735 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
1736 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
1737 _index = 0;
1738 }
1739 }
1740 public:
1741 BacktraceIterator(objArrayHandle result, Thread* thread) {
1742 init(result, thread);
1743 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
1744 }
1745
1746 BacktraceElement next(Thread* thread) {
1747 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
1748 _methods->short_at(_index),
1749 Backtrace::version_at(_bcis->int_at(_index)),
1750 Backtrace::bci_at(_bcis->int_at(_index)),
1751 _names->symbol_at(_index));
1752 _index++;
1753
1754 if (_index >= java_lang_Throwable::trace_chunk_size) {
1755 int next_offset = java_lang_Throwable::trace_next_offset;
1756 // Get next chunk
1757 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
1758 init(result, thread);
1759 }
1760 return e;
1761 }
1762
1763 bool repeat() {
1764 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
1765 }
1766 };
1767
1768
1769 // Print stack trace element to resource allocated buffer
1770 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
1771 int version, int bci, Symbol* name) {
1772 ResourceMark rm;
1773
1774 // Get strings and string lengths
1775 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1776 const char* klass_name = holder->external_name();
1777 int buf_len = (int)strlen(klass_name);
1778
1779 char* method_name = name->as_C_string();
1780 buf_len += (int)strlen(method_name);
1781
1782 char* source_file_name = NULL;
1783 Symbol* source = Backtrace::get_source_file_name(holder, version);
1784 if (source != NULL) {
1785 source_file_name = source->as_C_string();
1786 buf_len += (int)strlen(source_file_name);
1787 }
1788
1789 char *module_name = NULL, *module_version = NULL;
1790 ModuleEntry* module = holder->module();
1791 if (module->is_named()) {
1792 module_name = module->name()->as_C_string();
1793 buf_len += (int)strlen(module_name);
1794 if (module->version() != NULL) {
1795 module_version = module->version()->as_C_string();
1796 buf_len += (int)strlen(module_version);
1797 }
1798 }
1799
1800 // Allocate temporary buffer with extra space for formatting and line number
1801 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1802
1803 // Print stack trace line in buffer
1804 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
1805
1806 // Print module information
1807 if (module_name != NULL) {
1808 if (module_version != NULL) {
1809 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
1810 } else {
1811 sprintf(buf + (int)strlen(buf), "%s/", module_name);
1812 }
1813 }
1814
1815 // The method can be NULL if the requested class version is gone
1816 Method* method = holder->method_with_orig_idnum(method_id, version);
1817 if (!version_matches(method, version)) {
1818 strcat(buf, "Redefined)");
1819 } else {
1820 int line_number = Backtrace::get_line_number(method, bci);
1821 if (line_number == -2) {
1822 strcat(buf, "Native Method)");
1823 } else {
1824 if (source_file_name != NULL && (line_number != -1)) {
1825 // Sourcename and linenumber
1826 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
1827 } else if (source_file_name != NULL) {
1828 // Just sourcename
1829 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
1830 } else {
1831 // Neither sourcename nor linenumber
1832 sprintf(buf + (int)strlen(buf), "Unknown Source)");
1833 }
1834 CompiledMethod* nm = method->code();
1835 if (WizardMode && nm != NULL) {
1836 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1837 }
1838 }
1839 }
1840
1841 st->print_cr("%s", buf);
1842 }
1843
1844 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
1845 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
1846 int method_id = method->orig_method_idnum();
1847 int version = method->constants()->version();
1848 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
1849 }
1850
1851 /**
1852 * Print the throwable message and its stack trace plus all causes by walking the
1853 * cause chain. The output looks the same as of Throwable.printStackTrace().
1854 */
1855 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
1856 // First, print the message.
1857 print(throwable(), st);
1858 st->cr();
1859
1860 // Now print the stack trace.
1861 Thread* THREAD = Thread::current();
1862 while (throwable.not_null()) {
1863 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
1864 if (result.is_null()) {
1865 st->print_raw_cr("\t<<no stack trace available>>");
1866 return;
1867 }
1868 BacktraceIterator iter(result, THREAD);
1869
1870 while (iter.repeat()) {
1871 BacktraceElement bte = iter.next(THREAD);
1872 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
1873 }
1874 {
1875 // Call getCause() which doesn't necessarily return the _cause field.
1876 EXCEPTION_MARK;
1877 JavaValue cause(T_OBJECT);
1878 JavaCalls::call_virtual(&cause,
1879 throwable,
1880 throwable->klass(),
1881 vmSymbols::getCause_name(),
1882 vmSymbols::void_throwable_signature(),
1883 THREAD);
1884 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1885 if (HAS_PENDING_EXCEPTION) {
1886 CLEAR_PENDING_EXCEPTION;
1887 throwable = Handle();
1888 } else {
1889 throwable = Handle(THREAD, (oop) cause.get_jobject());
1890 if (throwable.not_null()) {
1891 st->print("Caused by: ");
1892 print(throwable(), st);
1893 st->cr();
1894 }
1895 }
1896 }
1897 }
1898 }
1899
1900 /**
1901 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
1902 */
1903 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
1904 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
1905 JavaValue result(T_VOID);
1906 JavaCalls::call_virtual(&result,
1907 throwable,
1908 SystemDictionary::Throwable_klass(),
1909 vmSymbols::printStackTrace_name(),
1910 vmSymbols::void_method_signature(),
1911 THREAD);
1912 }
1913
1914 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
1915 if (!StackTraceInThrowable) return;
1916 ResourceMark rm(THREAD);
1917
1918 // Start out by clearing the backtrace for this object, in case the VM
1919 // runs out of memory while allocating the stack trace
1920 set_backtrace(throwable(), NULL);
1921 // Clear lazily constructed Java level stacktrace if refilling occurs
1922 // This is unnecessary in 1.7+ but harmless
1923 clear_stacktrace(throwable());
1924
1925 int max_depth = MaxJavaStackTraceDepth;
1926 JavaThread* thread = (JavaThread*)THREAD;
1927
1928 BacktraceBuilder bt(CHECK);
1929
1930 // If there is no Java frame just return the method that was being called
1931 // with bci 0
1932 if (!thread->has_last_Java_frame()) {
1933 if (max_depth >= 1 && method() != NULL) {
1934 bt.push(method(), 0, CHECK);
1935 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
1936 set_depth(throwable(), 1);
1937 set_backtrace(throwable(), bt.backtrace());
1938 }
1939 return;
1940 }
1941
1942 // Instead of using vframe directly, this version of fill_in_stack_trace
1943 // basically handles everything by hand. This significantly improved the
1944 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1945 // See bug 6333838 for more details.
1946 // The "ASSERT" here is to verify this method generates the exactly same stack
1947 // trace as utilizing vframe.
1948 #ifdef ASSERT
1949 vframeStream st(thread);
1950 methodHandle st_method(THREAD, st.method());
1951 #endif
1952 int total_count = 0;
1953 RegisterMap map(thread, false);
1954 int decode_offset = 0;
1955 CompiledMethod* nm = NULL;
1956 bool skip_fillInStackTrace_check = false;
1957 bool skip_throwableInit_check = false;
1958 bool skip_hidden = !ShowHiddenFrames;
1959
1960 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1961 Method* method = NULL;
1962 int bci = 0;
1963
1964 // Compiled java method case.
1965 if (decode_offset != 0) {
1966 DebugInfoReadStream stream(nm, decode_offset);
1967 decode_offset = stream.read_int();
1968 method = (Method*)nm->metadata_at(stream.read_int());
1969 bci = stream.read_bci();
1970 } else {
1971 if (fr.is_first_frame()) break;
1972 address pc = fr.pc();
1973 if (fr.is_interpreted_frame()) {
1974 address bcp = fr.interpreter_frame_bcp();
1975 method = fr.interpreter_frame_method();
1976 bci = method->bci_from(bcp);
1977 fr = fr.sender(&map);
1978 } else {
1979 CodeBlob* cb = fr.cb();
1980 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1981 // but non nmethod
1982 fr = fr.sender(&map);
1983 if (cb == NULL || !cb->is_compiled()) {
1984 continue;
1985 }
1986 nm = cb->as_compiled_method();
1987 if (nm->method()->is_native()) {
1988 method = nm->method();
1989 bci = 0;
1990 } else {
1991 PcDesc* pd = nm->pc_desc_at(pc);
1992 decode_offset = pd->scope_decode_offset();
1993 // if decode_offset is not equal to 0, it will execute the
1994 // "compiled java method case" at the beginning of the loop.
1995 continue;
1996 }
1997 }
1998 }
1999 #ifdef ASSERT
2000 assert(st_method() == method && st.bci() == bci,
2001 "Wrong stack trace");
2002 st.next();
2003 // vframeStream::method isn't GC-safe so store off a copy
2004 // of the Method* in case we GC.
2005 if (!st.at_end()) {
2006 st_method = st.method();
2007 }
2008 #endif
2009
2010 // the format of the stacktrace will be:
2011 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2012 // - 0 or more <init> methods for the exception class (skipped)
2013 // - rest of the stack
2014
2015 if (!skip_fillInStackTrace_check) {
2016 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2017 throwable->is_a(method->method_holder())) {
2018 continue;
2019 }
2020 else {
2021 skip_fillInStackTrace_check = true; // gone past them all
2022 }
2023 }
2024 if (!skip_throwableInit_check) {
2025 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2026
2027 // skip <init> methods of the exception class and superclasses
2028 // This is simlar to classic VM.
2029 if (method->name() == vmSymbols::object_initializer_name() &&
2030 throwable->is_a(method->method_holder())) {
2031 continue;
2032 } else {
2033 // there are none or we've seen them all - either way stop checking
2034 skip_throwableInit_check = true;
2035 }
2036 }
2037 if (method->is_hidden()) {
2038 if (skip_hidden) continue;
2039 }
2040 bt.push(method, bci, CHECK);
2041 total_count++;
2042 }
2043
2044 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2045
2046 // Put completed stack trace into throwable object
2047 set_backtrace(throwable(), bt.backtrace());
2048 set_depth(throwable(), total_count);
2049 }
2050
2051 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2052 // No-op if stack trace is disabled
2053 if (!StackTraceInThrowable) {
2054 return;
2055 }
2056
2057 // Disable stack traces for some preallocated out of memory errors
2058 if (!Universe::should_fill_in_stack_trace(throwable)) {
2059 return;
2060 }
2061
2062 PRESERVE_EXCEPTION_MARK;
2063
2064 JavaThread* thread = JavaThread::active();
2065 fill_in_stack_trace(throwable, method, thread);
2066 // ignore exceptions thrown during stack trace filling
2067 CLEAR_PENDING_EXCEPTION;
2068 }
2069
2070 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2071 // Allocate stack trace - backtrace is created but not filled in
2072
2073 // No-op if stack trace is disabled
2074 if (!StackTraceInThrowable) return;
2075 BacktraceBuilder bt(CHECK); // creates a backtrace
2076 set_backtrace(throwable(), bt.backtrace());
2077 }
2078
2079
2080 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2081 // Fill in stack trace into preallocated backtrace (no GC)
2082
2083 // No-op if stack trace is disabled
2084 if (!StackTraceInThrowable) return;
2085
2086 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2087
2088 JavaThread* THREAD = JavaThread::current();
2089
2090 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2091 assert(backtrace.not_null(), "backtrace should have been preallocated");
2092
2093 ResourceMark rm(THREAD);
2094 vframeStream st(THREAD);
2095
2096 BacktraceBuilder bt(THREAD, backtrace);
2097
2098 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2099 // methods as preallocated errors aren't created by "java" code.
2100
2101 // fill in as much stack trace as possible
2102 int chunk_count = 0;
2103 for (;!st.at_end(); st.next()) {
2104 bt.push(st.method(), st.bci(), CHECK);
2105 chunk_count++;
2106
2107 // Bail-out for deep stacks
2108 if (chunk_count >= trace_chunk_size) break;
2109 }
2110 set_depth(throwable(), chunk_count);
2111 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2112
2113 // We support the Throwable immutability protocol defined for Java 7.
2114 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2115 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2116 }
2117
2118 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2119 objArrayHandle stack_trace_array_h, TRAPS) {
2120
2121 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2122 THROW(vmSymbols::java_lang_NullPointerException());
2123 }
2124
2125 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2126
2127 if (stack_trace_array_h->length() != depth(throwable())) {
2128 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2129 }
2130
2131 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2132 BacktraceIterator iter(result, THREAD);
2133
2134 int index = 0;
2135 while (iter.repeat()) {
2136 BacktraceElement bte = iter.next(THREAD);
2137
2138 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2139
2140 if (stack_trace_element.is_null()) {
2141 THROW(vmSymbols::java_lang_NullPointerException());
2142 }
2143
2144 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2145 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2146
2147 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2148 method,
2149 bte._version,
2150 bte._bci,
2151 bte._name, CHECK);
2152 }
2153 }
2154
2155 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2156 // Allocate java.lang.StackTraceElement instance
2157 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2158 assert(k != NULL, "must be loaded in 1.4+");
2159 if (k->should_be_initialized()) {
2160 k->initialize(CHECK_0);
2161 }
2162
2163 Handle element = k->allocate_instance_handle(CHECK_0);
2164
2165 int version = method->constants()->version();
2166 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2167 return element();
2168 }
2169
2170 void java_lang_StackTraceElement::fill_in(Handle element,
2171 InstanceKlass* holder, const methodHandle& method,
2172 int version, int bci, Symbol* name, TRAPS) {
2173 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2174
2175 // Fill in class name
2176 ResourceMark rm(THREAD);
2177 const char* str = holder->external_name();
2178 oop classname = StringTable::intern((char*) str, CHECK);
2179 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2180 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror());
2181
2182 oop loader = holder->class_loader();
2183 if (loader != NULL) {
2184 oop loader_name = java_lang_ClassLoader::name(loader);
2185 if (loader_name != NULL)
2186 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2187 }
2188
2189 // Fill in method name
2190 oop methodname = StringTable::intern(name, CHECK);
2191 java_lang_StackTraceElement::set_methodName(element(), methodname);
2192
2193 // Fill in module name and version
2194 ModuleEntry* module = holder->module();
2195 if (module->is_named()) {
2196 oop module_name = StringTable::intern(module->name(), CHECK);
2197 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2198 oop module_version;
2199 if (module->version() != NULL) {
2200 module_version = StringTable::intern(module->version(), CHECK);
2201 } else {
2202 module_version = NULL;
2203 }
2204 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2205 }
2206
2207 if (method() == NULL || !version_matches(method(), version)) {
2208 // The method was redefined, accurate line number information isn't available
2209 java_lang_StackTraceElement::set_fileName(element(), NULL);
2210 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2211 } else {
2212 // Fill in source file name and line number.
2213 Symbol* source = Backtrace::get_source_file_name(holder, version);
2214 if (ShowHiddenFrames && source == NULL)
2215 source = vmSymbols::unknown_class_name();
2216 oop filename = StringTable::intern(source, CHECK);
2217 java_lang_StackTraceElement::set_fileName(element(), filename);
2218
2219 int line_number = Backtrace::get_line_number(method, bci);
2220 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2221 }
2222 }
2223
2224 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2225 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2226 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2227 // we should expand MemberName::name when Throwable uses StackTrace
2228 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2229 return method;
2230 }
2231
2232 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2233 // set Method* or mid/cpref
2234 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2235 InstanceKlass* ik = method->method_holder();
2236 CallInfo info(method(), ik, CHECK);
2237 MethodHandles::init_method_MemberName(mname, info);
2238 // set bci
2239 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2240 // method may be redefined; store the version
2241 int version = method->constants()->version();
2242 assert((jushort)version == version, "version should be short");
2243 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2244 }
2245
2246 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2247 ResourceMark rm(THREAD);
2248 Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset));
2249 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k()));
2250 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2251
2252 short version = stackFrame->short_field(_version_offset);
2253 short bci = stackFrame->short_field(_bci_offset);
2254 Symbol* name = method->name();
2255 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2256 }
2257
2258 void java_lang_StackFrameInfo::compute_offsets() {
2259 Klass* k = SystemDictionary::StackFrameInfo_klass();
2260 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature());
2261 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature());
2262 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::short_signature());
2263 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2264 }
2265
2266 void java_lang_LiveStackFrameInfo::compute_offsets() {
2267 Klass* k = SystemDictionary::LiveStackFrameInfo_klass();
2268 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature());
2269 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature());
2270 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature());
2271 compute_offset(_mode_offset, k, vmSymbols::mode_name(), vmSymbols::int_signature());
2272 }
2273
2274 void java_lang_reflect_AccessibleObject::compute_offsets() {
2275 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
2276 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
2277 }
2278
2279 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2280 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2281 return (jboolean) reflect->bool_field(override_offset);
2282 }
2283
2284 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2285 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2286 reflect->bool_field_put(override_offset, (int) value);
2287 }
2288
2289 void java_lang_reflect_Method::compute_offsets() {
2290 Klass* k = SystemDictionary::reflect_Method_klass();
2291 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2292 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2293 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
2294 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2295 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2296 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2297 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2298 // The generic signature and annotations fields are only present in 1.5
2299 signature_offset = -1;
2300 annotations_offset = -1;
2301 parameter_annotations_offset = -1;
2302 annotation_default_offset = -1;
2303 type_annotations_offset = -1;
2304 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2305 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2306 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2307 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
2308 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2309 }
2310
2311 Handle java_lang_reflect_Method::create(TRAPS) {
2312 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2313 Klass* klass = SystemDictionary::reflect_Method_klass();
2314 // This class is eagerly initialized during VM initialization, since we keep a refence
2315 // to one of the methods
2316 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2317 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2318 }
2319
2320 oop java_lang_reflect_Method::clazz(oop reflect) {
2321 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2322 return reflect->obj_field(clazz_offset);
2323 }
2324
2325 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2326 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2327 reflect->obj_field_put(clazz_offset, value);
2328 }
2329
2330 int java_lang_reflect_Method::slot(oop reflect) {
2331 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2332 return reflect->int_field(slot_offset);
2333 }
2334
2335 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2336 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2337 reflect->int_field_put(slot_offset, value);
2338 }
2339
2340 oop java_lang_reflect_Method::name(oop method) {
2341 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2342 return method->obj_field(name_offset);
2343 }
2344
2345 void java_lang_reflect_Method::set_name(oop method, oop value) {
2346 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2347 method->obj_field_put(name_offset, value);
2348 }
2349
2350 oop java_lang_reflect_Method::return_type(oop method) {
2351 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2352 return method->obj_field(returnType_offset);
2353 }
2354
2355 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2356 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2357 method->obj_field_put(returnType_offset, value);
2358 }
2359
2360 oop java_lang_reflect_Method::parameter_types(oop method) {
2361 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2362 return method->obj_field(parameterTypes_offset);
2363 }
2364
2365 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2366 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2367 method->obj_field_put(parameterTypes_offset, value);
2368 }
2369
2370 oop java_lang_reflect_Method::exception_types(oop method) {
2371 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2372 return method->obj_field(exceptionTypes_offset);
2373 }
2374
2375 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2376 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2377 method->obj_field_put(exceptionTypes_offset, value);
2378 }
2379
2380 int java_lang_reflect_Method::modifiers(oop method) {
2381 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2382 return method->int_field(modifiers_offset);
2383 }
2384
2385 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2386 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2387 method->int_field_put(modifiers_offset, value);
2388 }
2389
2390 bool java_lang_reflect_Method::has_signature_field() {
2391 return (signature_offset >= 0);
2392 }
2393
2394 oop java_lang_reflect_Method::signature(oop method) {
2395 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2396 assert(has_signature_field(), "signature field must be present");
2397 return method->obj_field(signature_offset);
2398 }
2399
2400 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2401 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2402 assert(has_signature_field(), "signature field must be present");
2403 method->obj_field_put(signature_offset, value);
2404 }
2405
2406 bool java_lang_reflect_Method::has_annotations_field() {
2407 return (annotations_offset >= 0);
2408 }
2409
2410 oop java_lang_reflect_Method::annotations(oop method) {
2411 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2412 assert(has_annotations_field(), "annotations field must be present");
2413 return method->obj_field(annotations_offset);
2414 }
2415
2416 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2417 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2418 assert(has_annotations_field(), "annotations field must be present");
2419 method->obj_field_put(annotations_offset, value);
2420 }
2421
2422 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2423 return (parameter_annotations_offset >= 0);
2424 }
2425
2426 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2427 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2428 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2429 return method->obj_field(parameter_annotations_offset);
2430 }
2431
2432 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2433 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2434 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2435 method->obj_field_put(parameter_annotations_offset, value);
2436 }
2437
2438 bool java_lang_reflect_Method::has_annotation_default_field() {
2439 return (annotation_default_offset >= 0);
2440 }
2441
2442 oop java_lang_reflect_Method::annotation_default(oop method) {
2443 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2444 assert(has_annotation_default_field(), "annotation default field must be present");
2445 return method->obj_field(annotation_default_offset);
2446 }
2447
2448 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2449 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2450 assert(has_annotation_default_field(), "annotation default field must be present");
2451 method->obj_field_put(annotation_default_offset, value);
2452 }
2453
2454 bool java_lang_reflect_Method::has_type_annotations_field() {
2455 return (type_annotations_offset >= 0);
2456 }
2457
2458 oop java_lang_reflect_Method::type_annotations(oop method) {
2459 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2460 assert(has_type_annotations_field(), "type_annotations field must be present");
2461 return method->obj_field(type_annotations_offset);
2462 }
2463
2464 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2465 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2466 assert(has_type_annotations_field(), "type_annotations field must be present");
2467 method->obj_field_put(type_annotations_offset, value);
2468 }
2469
2470 void java_lang_reflect_Constructor::compute_offsets() {
2471 Klass* k = SystemDictionary::reflect_Constructor_klass();
2472 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2473 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2474 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2475 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2476 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2477 // The generic signature and annotations fields are only present in 1.5
2478 signature_offset = -1;
2479 annotations_offset = -1;
2480 parameter_annotations_offset = -1;
2481 type_annotations_offset = -1;
2482 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2483 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2484 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2485 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2486 }
2487
2488 Handle java_lang_reflect_Constructor::create(TRAPS) {
2489 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2490 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2491 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2492 InstanceKlass* ik = InstanceKlass::cast(k);
2493 // Ensure it is initialized
2494 ik->initialize(CHECK_NH);
2495 return ik->allocate_instance_handle(THREAD);
2496 }
2497
2498 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2499 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2500 return reflect->obj_field(clazz_offset);
2501 }
2502
2503 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2504 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2505 reflect->obj_field_put(clazz_offset, value);
2506 }
2507
2508 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2509 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2510 return constructor->obj_field(parameterTypes_offset);
2511 }
2512
2513 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2514 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2515 constructor->obj_field_put(parameterTypes_offset, value);
2516 }
2517
2518 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2519 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2520 return constructor->obj_field(exceptionTypes_offset);
2521 }
2522
2523 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2524 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2525 constructor->obj_field_put(exceptionTypes_offset, value);
2526 }
2527
2528 int java_lang_reflect_Constructor::slot(oop reflect) {
2529 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2530 return reflect->int_field(slot_offset);
2531 }
2532
2533 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2534 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2535 reflect->int_field_put(slot_offset, value);
2536 }
2537
2538 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2539 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2540 return constructor->int_field(modifiers_offset);
2541 }
2542
2543 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2544 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2545 constructor->int_field_put(modifiers_offset, value);
2546 }
2547
2548 bool java_lang_reflect_Constructor::has_signature_field() {
2549 return (signature_offset >= 0);
2550 }
2551
2552 oop java_lang_reflect_Constructor::signature(oop constructor) {
2553 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2554 assert(has_signature_field(), "signature field must be present");
2555 return constructor->obj_field(signature_offset);
2556 }
2557
2558 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2559 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2560 assert(has_signature_field(), "signature field must be present");
2561 constructor->obj_field_put(signature_offset, value);
2562 }
2563
2564 bool java_lang_reflect_Constructor::has_annotations_field() {
2565 return (annotations_offset >= 0);
2566 }
2567
2568 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2569 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2570 assert(has_annotations_field(), "annotations field must be present");
2571 return constructor->obj_field(annotations_offset);
2572 }
2573
2574 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2575 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2576 assert(has_annotations_field(), "annotations field must be present");
2577 constructor->obj_field_put(annotations_offset, value);
2578 }
2579
2580 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2581 return (parameter_annotations_offset >= 0);
2582 }
2583
2584 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2585 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2586 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2587 return method->obj_field(parameter_annotations_offset);
2588 }
2589
2590 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2591 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2592 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2593 method->obj_field_put(parameter_annotations_offset, value);
2594 }
2595
2596 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2597 return (type_annotations_offset >= 0);
2598 }
2599
2600 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2601 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2602 assert(has_type_annotations_field(), "type_annotations field must be present");
2603 return constructor->obj_field(type_annotations_offset);
2604 }
2605
2606 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2607 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2608 assert(has_type_annotations_field(), "type_annotations field must be present");
2609 constructor->obj_field_put(type_annotations_offset, value);
2610 }
2611
2612 void java_lang_reflect_Field::compute_offsets() {
2613 Klass* k = SystemDictionary::reflect_Field_klass();
2614 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2615 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2616 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2617 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2618 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2619 // The generic signature and annotations fields are only present in 1.5
2620 signature_offset = -1;
2621 annotations_offset = -1;
2622 type_annotations_offset = -1;
2623 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2624 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2625 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2626 }
2627
2628 Handle java_lang_reflect_Field::create(TRAPS) {
2629 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2630 Symbol* name = vmSymbols::java_lang_reflect_Field();
2631 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2632 InstanceKlass* ik = InstanceKlass::cast(k);
2633 // Ensure it is initialized
2634 ik->initialize(CHECK_NH);
2635 return ik->allocate_instance_handle(THREAD);
2636 }
2637
2638 oop java_lang_reflect_Field::clazz(oop reflect) {
2639 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2640 return reflect->obj_field(clazz_offset);
2641 }
2642
2643 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2644 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2645 reflect->obj_field_put(clazz_offset, value);
2646 }
2647
2648 oop java_lang_reflect_Field::name(oop field) {
2649 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2650 return field->obj_field(name_offset);
2651 }
2652
2653 void java_lang_reflect_Field::set_name(oop field, oop value) {
2654 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2655 field->obj_field_put(name_offset, value);
2656 }
2657
2658 oop java_lang_reflect_Field::type(oop field) {
2659 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2660 return field->obj_field(type_offset);
2661 }
2662
2663 void java_lang_reflect_Field::set_type(oop field, oop value) {
2664 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2665 field->obj_field_put(type_offset, value);
2666 }
2667
2668 int java_lang_reflect_Field::slot(oop reflect) {
2669 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2670 return reflect->int_field(slot_offset);
2671 }
2672
2673 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2674 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2675 reflect->int_field_put(slot_offset, value);
2676 }
2677
2678 int java_lang_reflect_Field::modifiers(oop field) {
2679 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2680 return field->int_field(modifiers_offset);
2681 }
2682
2683 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2684 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2685 field->int_field_put(modifiers_offset, value);
2686 }
2687
2688 bool java_lang_reflect_Field::has_signature_field() {
2689 return (signature_offset >= 0);
2690 }
2691
2692 oop java_lang_reflect_Field::signature(oop field) {
2693 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2694 assert(has_signature_field(), "signature field must be present");
2695 return field->obj_field(signature_offset);
2696 }
2697
2698 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2699 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2700 assert(has_signature_field(), "signature field must be present");
2701 field->obj_field_put(signature_offset, value);
2702 }
2703
2704 bool java_lang_reflect_Field::has_annotations_field() {
2705 return (annotations_offset >= 0);
2706 }
2707
2708 oop java_lang_reflect_Field::annotations(oop field) {
2709 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2710 assert(has_annotations_field(), "annotations field must be present");
2711 return field->obj_field(annotations_offset);
2712 }
2713
2714 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2715 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2716 assert(has_annotations_field(), "annotations field must be present");
2717 field->obj_field_put(annotations_offset, value);
2718 }
2719
2720 bool java_lang_reflect_Field::has_type_annotations_field() {
2721 return (type_annotations_offset >= 0);
2722 }
2723
2724 oop java_lang_reflect_Field::type_annotations(oop field) {
2725 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2726 assert(has_type_annotations_field(), "type_annotations field must be present");
2727 return field->obj_field(type_annotations_offset);
2728 }
2729
2730 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2731 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2732 assert(has_type_annotations_field(), "type_annotations field must be present");
2733 field->obj_field_put(type_annotations_offset, value);
2734 }
2735
2736 void reflect_ConstantPool::compute_offsets() {
2737 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2738 // This null test can be removed post beta
2739 if (k != NULL) {
2740 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2741 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2742 }
2743 }
2744
2745 void java_lang_reflect_Parameter::compute_offsets() {
2746 Klass* k = SystemDictionary::reflect_Parameter_klass();
2747 if(NULL != k) {
2748 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2749 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2750 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2751 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2752 }
2753 }
2754
2755 Handle java_lang_reflect_Parameter::create(TRAPS) {
2756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2757 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2758 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2759 InstanceKlass* ik = InstanceKlass::cast(k);
2760 // Ensure it is initialized
2761 ik->initialize(CHECK_NH);
2762 return ik->allocate_instance_handle(THREAD);
2763 }
2764
2765 oop java_lang_reflect_Parameter::name(oop param) {
2766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2767 return param->obj_field(name_offset);
2768 }
2769
2770 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2772 param->obj_field_put(name_offset, value);
2773 }
2774
2775 int java_lang_reflect_Parameter::modifiers(oop param) {
2776 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2777 return param->int_field(modifiers_offset);
2778 }
2779
2780 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2782 param->int_field_put(modifiers_offset, value);
2783 }
2784
2785 int java_lang_reflect_Parameter::index(oop param) {
2786 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2787 return param->int_field(index_offset);
2788 }
2789
2790 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2792 param->int_field_put(index_offset, value);
2793 }
2794
2795 oop java_lang_reflect_Parameter::executable(oop param) {
2796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2797 return param->obj_field(executable_offset);
2798 }
2799
2800 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2802 param->obj_field_put(executable_offset, value);
2803 }
2804
2805
2806 int java_lang_Module::loader_offset;
2807 int java_lang_Module::name_offset;
2808 int java_lang_Module::_module_entry_offset = -1;
2809
2810 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
2811 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2812
2813 Symbol* name = vmSymbols::java_lang_Module();
2814 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2815 InstanceKlass* ik = InstanceKlass::cast(k);
2816 Handle jlmh = ik->allocate_instance_handle(CHECK_NH);
2817 JavaValue result(T_VOID);
2818 JavaCalls::call_special(&result, jlmh, ik,
2819 vmSymbols::object_initializer_name(),
2820 vmSymbols::java_lang_module_init_signature(),
2821 loader, module_name, CHECK_NH);
2822 return jlmh;
2823 }
2824
2825 void java_lang_Module::compute_offsets() {
2826 Klass* k = SystemDictionary::Module_klass();
2827 if(NULL != k) {
2828 compute_offset(loader_offset, k, vmSymbols::loader_name(), vmSymbols::classloader_signature());
2829 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2830 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2831 }
2832 }
2833
2834
2835 oop java_lang_Module::loader(oop module) {
2836 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2837 return module->obj_field(loader_offset);
2838 }
2839
2840 void java_lang_Module::set_loader(oop module, oop value) {
2841 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2842 module->obj_field_put(loader_offset, value);
2843 }
2844
2845 oop java_lang_Module::name(oop module) {
2846 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2847 return module->obj_field(name_offset);
2848 }
2849
2850 void java_lang_Module::set_name(oop module, oop value) {
2851 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2852 module->obj_field_put(name_offset, value);
2853 }
2854
2855 ModuleEntry* java_lang_Module::module_entry(oop module, TRAPS) {
2856 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2857 assert(module != NULL, "module can't be null");
2858 assert(module->is_oop(), "module must be oop");
2859
2860 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
2861 if (module_entry == NULL) {
2862 // If the inject field containing the ModuleEntry* is null then return the
2863 // class loader's unnamed module.
2864 oop loader = java_lang_Module::loader(module);
2865 Handle h_loader = Handle(THREAD, loader);
2866 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL);
2867 return loader_cld->unnamed_module();
2868 }
2869 return module_entry;
2870 }
2871
2872 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
2873 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2874 assert(module != NULL, "module can't be null");
2875 assert(module->is_oop(), "module must be oop");
2876 module->address_field_put(_module_entry_offset, (address)module_entry);
2877 }
2878
2879 Handle reflect_ConstantPool::create(TRAPS) {
2880 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2881 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
2882 // Ensure it is initialized
2883 k->initialize(CHECK_NH);
2884 return k->allocate_instance_handle(THREAD);
2885 }
2886
2887
2888 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2889 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2890 oop mirror = value->pool_holder()->java_mirror();
2891 // Save the mirror to get back the constant pool.
2892 reflect->obj_field_put(_oop_offset, mirror);
2893 }
2894
2895 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
2896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2897
2898 oop mirror = reflect->obj_field(_oop_offset);
2899 Klass* k = java_lang_Class::as_Klass(mirror);
2900 assert(k->is_instance_klass(), "Must be");
2901
2902 // Get the constant pool back from the klass. Since class redefinition
2903 // merges the new constant pool into the old, this is essentially the
2904 // same constant pool as the original. If constant pool merging is
2905 // no longer done in the future, this will have to change to save
2906 // the original.
2907 return InstanceKlass::cast(k)->constants();
2908 }
2909
2910 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2911 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2912 // This null test can be removed post beta
2913 if (k != NULL) {
2914 compute_offset(_base_offset, k,
2915 vmSymbols::base_name(), vmSymbols::object_signature());
2916 }
2917 }
2918
2919 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2920 Klass* k = SystemDictionary::box_klass(type);
2921 if (k == NULL) return NULL;
2922 InstanceKlass* ik = InstanceKlass::cast(k);
2923 if (!ik->is_initialized()) ik->initialize(CHECK_0);
2924 return ik->allocate_instance(THREAD);
2925 }
2926
2927
2928 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2929 oop box = initialize_and_allocate(type, CHECK_0);
2930 if (box == NULL) return NULL;
2931 switch (type) {
2932 case T_BOOLEAN:
2933 box->bool_field_put(value_offset, value->z);
2934 break;
2935 case T_CHAR:
2936 box->char_field_put(value_offset, value->c);
2937 break;
2938 case T_FLOAT:
2939 box->float_field_put(value_offset, value->f);
2940 break;
2941 case T_DOUBLE:
2942 box->double_field_put(long_value_offset, value->d);
2943 break;
2944 case T_BYTE:
2945 box->byte_field_put(value_offset, value->b);
2946 break;
2947 case T_SHORT:
2948 box->short_field_put(value_offset, value->s);
2949 break;
2950 case T_INT:
2951 box->int_field_put(value_offset, value->i);
2952 break;
2953 case T_LONG:
2954 box->long_field_put(long_value_offset, value->j);
2955 break;
2956 default:
2957 return NULL;
2958 }
2959 return box;
2960 }
2961
2962
2963 BasicType java_lang_boxing_object::basic_type(oop box) {
2964 if (box == NULL) return T_ILLEGAL;
2965 BasicType type = SystemDictionary::box_klass_type(box->klass());
2966 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2967 return T_ILLEGAL;
2968 return type;
2969 }
2970
2971
2972 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2973 BasicType type = SystemDictionary::box_klass_type(box->klass());
2974 switch (type) {
2975 case T_BOOLEAN:
2976 value->z = box->bool_field(value_offset);
2977 break;
2978 case T_CHAR:
2979 value->c = box->char_field(value_offset);
2980 break;
2981 case T_FLOAT:
2982 value->f = box->float_field(value_offset);
2983 break;
2984 case T_DOUBLE:
2985 value->d = box->double_field(long_value_offset);
2986 break;
2987 case T_BYTE:
2988 value->b = box->byte_field(value_offset);
2989 break;
2990 case T_SHORT:
2991 value->s = box->short_field(value_offset);
2992 break;
2993 case T_INT:
2994 value->i = box->int_field(value_offset);
2995 break;
2996 case T_LONG:
2997 value->j = box->long_field(long_value_offset);
2998 break;
2999 default:
3000 return T_ILLEGAL;
3001 } // end switch
3002 return type;
3003 }
3004
3005
3006 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3007 BasicType type = SystemDictionary::box_klass_type(box->klass());
3008 switch (type) {
3009 case T_BOOLEAN:
3010 box->bool_field_put(value_offset, value->z);
3011 break;
3012 case T_CHAR:
3013 box->char_field_put(value_offset, value->c);
3014 break;
3015 case T_FLOAT:
3016 box->float_field_put(value_offset, value->f);
3017 break;
3018 case T_DOUBLE:
3019 box->double_field_put(long_value_offset, value->d);
3020 break;
3021 case T_BYTE:
3022 box->byte_field_put(value_offset, value->b);
3023 break;
3024 case T_SHORT:
3025 box->short_field_put(value_offset, value->s);
3026 break;
3027 case T_INT:
3028 box->int_field_put(value_offset, value->i);
3029 break;
3030 case T_LONG:
3031 box->long_field_put(long_value_offset, value->j);
3032 break;
3033 default:
3034 return T_ILLEGAL;
3035 } // end switch
3036 return type;
3037 }
3038
3039
3040 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3041 switch (type) {
3042 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3043 case T_CHAR: st->print("%d", value->c); break;
3044 case T_BYTE: st->print("%d", value->b); break;
3045 case T_SHORT: st->print("%d", value->s); break;
3046 case T_INT: st->print("%d", value->i); break;
3047 case T_LONG: st->print(INT64_FORMAT, value->j); break;
3048 case T_FLOAT: st->print("%f", value->f); break;
3049 case T_DOUBLE: st->print("%lf", value->d); break;
3050 default: st->print("type %d?", type); break;
3051 }
3052 }
3053
3054 // Support for java_lang_ref_SoftReference
3055
3056 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3057 return ref->long_field(timestamp_offset);
3058 }
3059
3060 jlong java_lang_ref_SoftReference::clock() {
3061 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3062 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3063 return *offset;
3064 }
3065
3066 void java_lang_ref_SoftReference::set_clock(jlong value) {
3067 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3068 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3069 *offset = value;
3070 }
3071
3072 // Support for java_lang_invoke_DirectMethodHandle
3073
3074 int java_lang_invoke_DirectMethodHandle::_member_offset;
3075
3076 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3077 oop member_name = NULL;
3078 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
3079 assert(is_dmh, "a DirectMethodHandle oop is expected");
3080 if (is_dmh) {
3081 member_name = dmh->obj_field(member_offset_in_bytes());
3082 }
3083 return member_name;
3084 }
3085
3086 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3087 Klass* k = SystemDictionary::DirectMethodHandle_klass();
3088 if (k != NULL) {
3089 compute_offset(_member_offset, k, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
3090 }
3091 }
3092
3093 // Support for java_lang_invoke_MethodHandle
3094
3095 int java_lang_invoke_MethodHandle::_type_offset;
3096 int java_lang_invoke_MethodHandle::_form_offset;
3097
3098 int java_lang_invoke_MemberName::_clazz_offset;
3099 int java_lang_invoke_MemberName::_name_offset;
3100 int java_lang_invoke_MemberName::_type_offset;
3101 int java_lang_invoke_MemberName::_flags_offset;
3102 int java_lang_invoke_MemberName::_method_offset;
3103 int java_lang_invoke_MemberName::_vmindex_offset;
3104
3105 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3106 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3107
3108 int java_lang_invoke_LambdaForm::_vmentry_offset;
3109
3110 void java_lang_invoke_MethodHandle::compute_offsets() {
3111 Klass* k = SystemDictionary::MethodHandle_klass();
3112 if (k != NULL) {
3113 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
3114 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
3115 }
3116 }
3117
3118 void java_lang_invoke_MemberName::compute_offsets() {
3119 Klass* k = SystemDictionary::MemberName_klass();
3120 assert (k != NULL, "jdk mismatch");
3121 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
3122 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
3123 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature());
3124 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature());
3125 compute_offset(_method_offset, k, vmSymbols::method_name(), vmSymbols::java_lang_invoke_ResolvedMethodName_signature());
3126 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3127 }
3128
3129 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3130 Klass* k = SystemDictionary::ResolvedMethodName_klass();
3131 assert(k != NULL, "jdk mismatch");
3132 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3133 }
3134
3135 void java_lang_invoke_LambdaForm::compute_offsets() {
3136 Klass* k = SystemDictionary::LambdaForm_klass();
3137 assert (k != NULL, "jdk mismatch");
3138 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
3139 }
3140
3141 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3142 return obj != NULL && is_subclass(obj->klass());
3143 }
3144
3145
3146 oop java_lang_invoke_MethodHandle::type(oop mh) {
3147 return mh->obj_field(_type_offset);
3148 }
3149
3150 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3151 mh->obj_field_put(_type_offset, mtype);
3152 }
3153
3154 oop java_lang_invoke_MethodHandle::form(oop mh) {
3155 assert(_form_offset != 0, "");
3156 return mh->obj_field(_form_offset);
3157 }
3158
3159 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3160 assert(_form_offset != 0, "");
3161 mh->obj_field_put(_form_offset, lform);
3162 }
3163
3164 /// MemberName accessors
3165
3166 oop java_lang_invoke_MemberName::clazz(oop mname) {
3167 assert(is_instance(mname), "wrong type");
3168 return mname->obj_field(_clazz_offset);
3169 }
3170
3171 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3172 assert(is_instance(mname), "wrong type");
3173 mname->obj_field_put(_clazz_offset, clazz);
3174 }
3175
3176 oop java_lang_invoke_MemberName::name(oop mname) {
3177 assert(is_instance(mname), "wrong type");
3178 return mname->obj_field(_name_offset);
3179 }
3180
3181 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3182 assert(is_instance(mname), "wrong type");
3183 mname->obj_field_put(_name_offset, name);
3184 }
3185
3186 oop java_lang_invoke_MemberName::type(oop mname) {
3187 assert(is_instance(mname), "wrong type");
3188 return mname->obj_field(_type_offset);
3189 }
3190
3191 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3192 assert(is_instance(mname), "wrong type");
3193 mname->obj_field_put(_type_offset, type);
3194 }
3195
3196 int java_lang_invoke_MemberName::flags(oop mname) {
3197 assert(is_instance(mname), "wrong type");
3198 return mname->int_field(_flags_offset);
3199 }
3200
3201 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3202 assert(is_instance(mname), "wrong type");
3203 mname->int_field_put(_flags_offset, flags);
3204 }
3205
3206
3207 // Return vmtarget from ResolvedMethodName method field through indirection
3208 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3209 assert(is_instance(mname), "wrong type");
3210 oop method = mname->obj_field(_method_offset);
3211 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3212 }
3213
3214 bool java_lang_invoke_MemberName::is_method(oop mname) {
3215 assert(is_instance(mname), "must be MemberName");
3216 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3217 }
3218
3219 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3220 assert(is_instance(mname), "wrong type");
3221 mname->obj_field_put(_method_offset, resolved_method);
3222 }
3223
3224 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3225 assert(is_instance(mname), "wrong type");
3226 return (intptr_t) mname->address_field(_vmindex_offset);
3227 }
3228
3229 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3230 assert(is_instance(mname), "wrong type");
3231 mname->address_field_put(_vmindex_offset, (address) index);
3232 }
3233
3234
3235 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3236 assert(is_instance(resolved_method), "wrong type");
3237 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3238 assert(m->is_method(), "must be");
3239 return m;
3240 }
3241
3242 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3243 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3244 assert(is_instance(resolved_method), "wrong type");
3245 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3246 }
3247
3248 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3249 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3250 oop resolved_method = ResolvedMethodTable::find_method(m());
3251 if (resolved_method == NULL) {
3252 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3253 if (!k->is_initialized()) {
3254 k->initialize(CHECK_NULL);
3255 }
3256 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3257 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3258 // Add a reference to the loader (actually mirror because anonymous classes will not have
3259 // distinct loaders) to ensure the metadata is kept alive.
3260 // This mirror may be different than the one in clazz field.
3261 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3262 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method));
3263 }
3264 return resolved_method;
3265 }
3266
3267 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3268 assert(is_instance(lform), "wrong type");
3269 return lform->obj_field(_vmentry_offset);
3270 }
3271
3272
3273 // Support for java_lang_invoke_MethodType
3274
3275 int java_lang_invoke_MethodType::_rtype_offset;
3276 int java_lang_invoke_MethodType::_ptypes_offset;
3277
3278 void java_lang_invoke_MethodType::compute_offsets() {
3279 Klass* k = SystemDictionary::MethodType_klass();
3280 if (k != NULL) {
3281 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
3282 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
3283 }
3284 }
3285
3286 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3287 st->print("(");
3288 objArrayOop pts = ptypes(mt);
3289 for (int i = 0, limit = pts->length(); i < limit; i++) {
3290 java_lang_Class::print_signature(pts->obj_at(i), st);
3291 }
3292 st->print(")");
3293 java_lang_Class::print_signature(rtype(mt), st);
3294 }
3295
3296 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3297 ResourceMark rm;
3298 stringStream buffer(128);
3299 print_signature(mt, &buffer);
3300 const char* sigstr = buffer.base();
3301 int siglen = (int) buffer.size();
3302 Symbol *name;
3303 if (!intern_if_not_found) {
3304 name = SymbolTable::probe(sigstr, siglen);
3305 } else {
3306 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3307 }
3308 return name;
3309 }
3310
3311 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3312 if (mt1 == mt2)
3313 return true;
3314 if (rtype(mt1) != rtype(mt2))
3315 return false;
3316 if (ptype_count(mt1) != ptype_count(mt2))
3317 return false;
3318 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3319 if (ptype(mt1, i) != ptype(mt2, i))
3320 return false;
3321 }
3322 return true;
3323 }
3324
3325 oop java_lang_invoke_MethodType::rtype(oop mt) {
3326 assert(is_instance(mt), "must be a MethodType");
3327 return mt->obj_field(_rtype_offset);
3328 }
3329
3330 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3331 assert(is_instance(mt), "must be a MethodType");
3332 return (objArrayOop) mt->obj_field(_ptypes_offset);
3333 }
3334
3335 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3336 return ptypes(mt)->obj_at(idx);
3337 }
3338
3339 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3340 return ptypes(mt)->length();
3341 }
3342
3343 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3344 objArrayOop pts = ptypes(mt);
3345 int count = pts->length();
3346 int slots = 0;
3347 for (int i = 0; i < count; i++) {
3348 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3349 slots += type2size[bt];
3350 }
3351 return slots;
3352 }
3353
3354 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3355 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3356 return type2size[bt];
3357 }
3358
3359
3360 // Support for java_lang_invoke_CallSite
3361
3362 int java_lang_invoke_CallSite::_target_offset;
3363 int java_lang_invoke_CallSite::_context_offset;
3364
3365 void java_lang_invoke_CallSite::compute_offsets() {
3366 Klass* k = SystemDictionary::CallSite_klass();
3367 if (k != NULL) {
3368 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
3369 compute_offset(_context_offset, k, vmSymbols::context_name(),
3370 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature());
3371 }
3372 }
3373
3374 oop java_lang_invoke_CallSite::context(oop call_site) {
3375 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3376
3377 oop dep_oop = call_site->obj_field(_context_offset);
3378 return dep_oop;
3379 }
3380
3381 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3382
3383 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3384
3385 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3386 Klass* k = SystemDictionary::Context_klass();
3387 if (k != NULL) {
3388 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3389 }
3390 }
3391
3392 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3393 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3394 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset);
3395 DependencyContext dep_ctx(vmdeps_addr);
3396 return dep_ctx;
3397 }
3398
3399 // Support for java_security_AccessControlContext
3400
3401 int java_security_AccessControlContext::_context_offset = 0;
3402 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3403 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3404 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3405
3406 void java_security_AccessControlContext::compute_offsets() {
3407 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3408 fieldDescriptor fd;
3409 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass();
3410
3411 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3412 fatal("Invalid layout of java.security.AccessControlContext");
3413 }
3414 _context_offset = fd.offset();
3415
3416 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3417 fatal("Invalid layout of java.security.AccessControlContext");
3418 }
3419 _privilegedContext_offset = fd.offset();
3420
3421 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3422 fatal("Invalid layout of java.security.AccessControlContext");
3423 }
3424 _isPrivileged_offset = fd.offset();
3425
3426 // The offset may not be present for bootstrapping with older JDK.
3427 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3428 _isAuthorized_offset = fd.offset();
3429 }
3430 }
3431
3432
3433 bool java_security_AccessControlContext::is_authorized(Handle context) {
3434 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3435 assert(_isAuthorized_offset != -1, "should be set");
3436 return context->bool_field(_isAuthorized_offset) != 0;
3437 }
3438
3439 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3440 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3441 // Ensure klass is initialized
3442 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3443 // Allocate result
3444 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3445 // Fill in values
3446 result->obj_field_put(_context_offset, context());
3447 result->obj_field_put(_privilegedContext_offset, privileged_context());
3448 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3449 // whitelist AccessControlContexts created by the JVM if present
3450 if (_isAuthorized_offset != -1) {
3451 result->bool_field_put(_isAuthorized_offset, true);
3452 }
3453 return result;
3454 }
3455
3456
3457 // Support for java_lang_ClassLoader
3458
3459 bool java_lang_ClassLoader::offsets_computed = false;
3460 int java_lang_ClassLoader::_loader_data_offset = -1;
3461 int java_lang_ClassLoader::parallelCapable_offset = -1;
3462 int java_lang_ClassLoader::name_offset = -1;
3463 int java_lang_ClassLoader::unnamedModule_offset = -1;
3464
3465 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3466 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3467 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3468 }
3469
3470 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3471 return *java_lang_ClassLoader::loader_data_addr(loader);
3472 }
3473
3474 void java_lang_ClassLoader::compute_offsets() {
3475 assert(!offsets_computed, "offsets should be initialized only once");
3476 offsets_computed = true;
3477
3478 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3479 Klass* k1 = SystemDictionary::ClassLoader_klass();
3480 compute_optional_offset(parallelCapable_offset,
3481 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3482
3483 compute_offset(name_offset,
3484 k1, vmSymbols::name_name(), vmSymbols::string_signature());
3485
3486 compute_offset(unnamedModule_offset,
3487 k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature());
3488
3489 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3490 }
3491
3492 oop java_lang_ClassLoader::parent(oop loader) {
3493 assert(is_instance(loader), "loader must be oop");
3494 return loader->obj_field(parent_offset);
3495 }
3496
3497 oop java_lang_ClassLoader::name(oop loader) {
3498 assert(is_instance(loader), "loader must be oop");
3499 return loader->obj_field(name_offset);
3500 }
3501
3502 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3503 assert(is_instance(loader), "loader must be oop");
3504 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3505 oop acl = loader;
3506 debug_only(jint loop_count = 0);
3507 // This loop taken verbatim from ClassLoader.java:
3508 do {
3509 acl = parent(acl);
3510 if (cl == acl) {
3511 return true;
3512 }
3513 assert(++loop_count > 0, "loop_count overflow");
3514 } while (acl != NULL);
3515 return false;
3516 }
3517
3518 bool java_lang_ClassLoader::is_instance(oop obj) {
3519 return obj != NULL && is_subclass(obj->klass());
3520 }
3521
3522
3523 // For class loader classes, parallelCapable defined
3524 // based on non-null field
3525 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3526 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3527 if (parallelCapable_offset == -1) {
3528 // Default for backward compatibility is false
3529 return false;
3530 }
3531 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3532 }
3533
3534 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3535 // Fix for 4474172; see evaluation for more details
3536 loader = non_reflection_class_loader(loader);
3537
3538 oop cl = SystemDictionary::java_system_loader();
3539 while(cl != NULL) {
3540 if (cl == loader) return true;
3541 cl = parent(cl);
3542 }
3543 return false;
3544 }
3545
3546 // Return true if this is one of the class loaders associated with
3547 // the generated bytecodes for reflection.
3548 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3549 if (loader != NULL) {
3550 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3551 // This might be null in non-1.4 JDKs
3552 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3553 }
3554 return false;
3555 }
3556
3557 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3558 // See whether this is one of the class loaders associated with
3559 // the generated bytecodes for reflection, and if so, "magically"
3560 // delegate to its parent to prevent class loading from occurring
3561 // in places where applications using reflection didn't expect it.
3562 if (is_reflection_class_loader(loader)) {
3563 return parent(loader);
3564 }
3565 return loader;
3566 }
3567
3568 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3569 assert(is_instance(loader), "loader must be oop");
3570 return loader->obj_field(unnamedModule_offset);
3571 }
3572
3573 // Support for java_lang_System
3574 int java_lang_System::in_offset_in_bytes() {
3575 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3576 }
3577
3578
3579 int java_lang_System::out_offset_in_bytes() {
3580 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3581 }
3582
3583
3584 int java_lang_System::err_offset_in_bytes() {
3585 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3586 }
3587
3588
3589 bool java_lang_System::has_security_manager() {
3590 InstanceKlass* ik = SystemDictionary::System_klass();
3591 address addr = ik->static_field_addr(static_security_offset);
3592 if (UseCompressedOops) {
3593 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3594 } else {
3595 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3596 }
3597 }
3598
3599 int java_lang_Class::_klass_offset;
3600 int java_lang_Class::_array_klass_offset;
3601 int java_lang_Class::_oop_size_offset;
3602 int java_lang_Class::_static_oop_field_count_offset;
3603 int java_lang_Class::_class_loader_offset;
3604 int java_lang_Class::_module_offset;
3605 int java_lang_Class::_protection_domain_offset;
3606 int java_lang_Class::_component_mirror_offset;
3607 int java_lang_Class::_init_lock_offset;
3608 int java_lang_Class::_signers_offset;
3609 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3610 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
3611 int java_lang_Throwable::backtrace_offset;
3612 int java_lang_Throwable::detailMessage_offset;
3613 int java_lang_Throwable::stackTrace_offset;
3614 int java_lang_Throwable::depth_offset;
3615 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3616 int java_lang_reflect_AccessibleObject::override_offset;
3617 int java_lang_reflect_Method::clazz_offset;
3618 int java_lang_reflect_Method::name_offset;
3619 int java_lang_reflect_Method::returnType_offset;
3620 int java_lang_reflect_Method::parameterTypes_offset;
3621 int java_lang_reflect_Method::exceptionTypes_offset;
3622 int java_lang_reflect_Method::slot_offset;
3623 int java_lang_reflect_Method::modifiers_offset;
3624 int java_lang_reflect_Method::signature_offset;
3625 int java_lang_reflect_Method::annotations_offset;
3626 int java_lang_reflect_Method::parameter_annotations_offset;
3627 int java_lang_reflect_Method::annotation_default_offset;
3628 int java_lang_reflect_Method::type_annotations_offset;
3629 int java_lang_reflect_Constructor::clazz_offset;
3630 int java_lang_reflect_Constructor::parameterTypes_offset;
3631 int java_lang_reflect_Constructor::exceptionTypes_offset;
3632 int java_lang_reflect_Constructor::slot_offset;
3633 int java_lang_reflect_Constructor::modifiers_offset;
3634 int java_lang_reflect_Constructor::signature_offset;
3635 int java_lang_reflect_Constructor::annotations_offset;
3636 int java_lang_reflect_Constructor::parameter_annotations_offset;
3637 int java_lang_reflect_Constructor::type_annotations_offset;
3638 int java_lang_reflect_Field::clazz_offset;
3639 int java_lang_reflect_Field::name_offset;
3640 int java_lang_reflect_Field::type_offset;
3641 int java_lang_reflect_Field::slot_offset;
3642 int java_lang_reflect_Field::modifiers_offset;
3643 int java_lang_reflect_Field::signature_offset;
3644 int java_lang_reflect_Field::annotations_offset;
3645 int java_lang_reflect_Field::type_annotations_offset;
3646 int java_lang_reflect_Parameter::name_offset;
3647 int java_lang_reflect_Parameter::modifiers_offset;
3648 int java_lang_reflect_Parameter::index_offset;
3649 int java_lang_reflect_Parameter::executable_offset;
3650 int java_lang_boxing_object::value_offset;
3651 int java_lang_boxing_object::long_value_offset;
3652 int java_lang_ref_Reference::referent_offset;
3653 int java_lang_ref_Reference::queue_offset;
3654 int java_lang_ref_Reference::next_offset;
3655 int java_lang_ref_Reference::discovered_offset;
3656 int java_lang_ref_Reference::number_of_fake_oop_fields;
3657 int java_lang_ref_SoftReference::timestamp_offset;
3658 int java_lang_ref_SoftReference::static_clock_offset;
3659 int java_lang_ClassLoader::parent_offset;
3660 int java_lang_System::static_in_offset;
3661 int java_lang_System::static_out_offset;
3662 int java_lang_System::static_err_offset;
3663 int java_lang_System::static_security_offset;
3664 int java_lang_StackTraceElement::methodName_offset;
3665 int java_lang_StackTraceElement::fileName_offset;
3666 int java_lang_StackTraceElement::lineNumber_offset;
3667 int java_lang_StackTraceElement::moduleName_offset;
3668 int java_lang_StackTraceElement::moduleVersion_offset;
3669 int java_lang_StackTraceElement::classLoaderName_offset;
3670 int java_lang_StackTraceElement::declaringClass_offset;
3671 int java_lang_StackTraceElement::declaringClassObject_offset;
3672 int java_lang_StackFrameInfo::_declaringClass_offset;
3673 int java_lang_StackFrameInfo::_memberName_offset;
3674 int java_lang_StackFrameInfo::_bci_offset;
3675 int java_lang_StackFrameInfo::_version_offset;
3676 int java_lang_LiveStackFrameInfo::_monitors_offset;
3677 int java_lang_LiveStackFrameInfo::_locals_offset;
3678 int java_lang_LiveStackFrameInfo::_operands_offset;
3679 int java_lang_LiveStackFrameInfo::_mode_offset;
3680 int java_lang_AssertionStatusDirectives::classes_offset;
3681 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3682 int java_lang_AssertionStatusDirectives::packages_offset;
3683 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3684 int java_lang_AssertionStatusDirectives::deflt_offset;
3685 int java_nio_Buffer::_limit_offset;
3686 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3687 int reflect_ConstantPool::_oop_offset;
3688 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3689
3690
3691 // Support for java_lang_StackTraceElement
3692
3693 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3694 element->obj_field_put(fileName_offset, value);
3695 }
3696
3697 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3698 element->obj_field_put(declaringClass_offset, value);
3699 }
3700
3701 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3702 element->obj_field_put(methodName_offset, value);
3703 }
3704
3705 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3706 element->int_field_put(lineNumber_offset, value);
3707 }
3708
3709 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
3710 element->obj_field_put(moduleName_offset, value);
3711 }
3712
3713 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
3714 element->obj_field_put(moduleVersion_offset, value);
3715 }
3716
3717 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
3718 element->obj_field_put(classLoaderName_offset, value);
3719 }
3720
3721 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
3722 element->obj_field_put(declaringClassObject_offset, value);
3723 }
3724
3725 // Support for java_lang_StackFrameInfo
3726 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) {
3727 element->obj_field_put(_declaringClass_offset, value);
3728 }
3729
3730 void java_lang_StackFrameInfo::set_version(oop element, short value) {
3731 element->short_field_put(_version_offset, value);
3732 }
3733
3734 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
3735 element->int_field_put(_bci_offset, value);
3736 }
3737
3738 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
3739 element->obj_field_put(_monitors_offset, value);
3740 }
3741
3742 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
3743 element->obj_field_put(_locals_offset, value);
3744 }
3745
3746 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
3747 element->obj_field_put(_operands_offset, value);
3748 }
3749
3750 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
3751 element->int_field_put(_mode_offset, value);
3752 }
3753
3754 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3755
3756 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3757 o->obj_field_put(classes_offset, val);
3758 }
3759
3760 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3761 o->obj_field_put(classEnabled_offset, val);
3762 }
3763
3764 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3765 o->obj_field_put(packages_offset, val);
3766 }
3767
3768 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3769 o->obj_field_put(packageEnabled_offset, val);
3770 }
3771
3772 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3773 o->bool_field_put(deflt_offset, val);
3774 }
3775
3776
3777 // Support for intrinsification of java.nio.Buffer.checkIndex
3778 int java_nio_Buffer::limit_offset() {
3779 return _limit_offset;
3780 }
3781
3782
3783 void java_nio_Buffer::compute_offsets() {
3784 Klass* k = SystemDictionary::nio_Buffer_klass();
3785 assert(k != NULL, "must be loaded in 1.4+");
3786 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3787 }
3788
3789 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3790 if (_owner_offset != 0) return;
3791
3792 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3793 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3794 compute_offset(_owner_offset, k,
3795 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3796 }
3797
3798 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3799 assert(_owner_offset != 0, "Must be initialized");
3800 return obj->obj_field(_owner_offset);
3801 }
3802
3803 // Compute hard-coded offsets
3804 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3805 // are not available to determine the offset_of_static_fields.
3806 void JavaClasses::compute_hard_coded_offsets() {
3807 const int x = heapOopSize;
3808 const int header = instanceOopDesc::base_offset_in_bytes();
3809
3810 // Throwable Class
3811 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3812 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3813 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3814 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3815
3816 // java_lang_boxing_object
3817 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3818 java_lang_boxing_object::long_value_offset = align_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3819
3820 // java_lang_ref_Reference:
3821 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3822 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3823 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3824 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3825 // Artificial fields for java_lang_ref_Reference
3826 // The first field is for the discovered field added in 1.4
3827 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3828
3829 // java_lang_ref_SoftReference Class
3830 java_lang_ref_SoftReference::timestamp_offset = align_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3831 // Don't multiply static fields because they are always in wordSize units
3832 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3833
3834 // java_lang_ClassLoader
3835 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3836
3837 // java_lang_System
3838 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3839 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3840 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3841 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3842
3843 // java_lang_StackTraceElement
3844 java_lang_StackTraceElement::declaringClassObject_offset = java_lang_StackTraceElement::hc_declaringClassObject_offset * x + header;
3845 java_lang_StackTraceElement::classLoaderName_offset = java_lang_StackTraceElement::hc_classLoaderName_offset * x + header;
3846 java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header;
3847 java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header;
3848 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3849 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3850 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3851 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3852 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3853 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3854 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3855 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3856 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3857
3858 }
3859
3860
3861 // Compute non-hard-coded field offsets of all the classes in this file
3862 void JavaClasses::compute_offsets() {
3863 // java_lang_Class::compute_offsets was called earlier in bootstrap
3864 java_lang_ClassLoader::compute_offsets();
3865 java_lang_Throwable::compute_offsets();
3866 java_lang_Thread::compute_offsets();
3867 java_lang_ThreadGroup::compute_offsets();
3868 java_lang_invoke_MethodHandle::compute_offsets();
3869 java_lang_invoke_DirectMethodHandle::compute_offsets();
3870 java_lang_invoke_MemberName::compute_offsets();
3871 java_lang_invoke_ResolvedMethodName::compute_offsets();
3872 java_lang_invoke_LambdaForm::compute_offsets();
3873 java_lang_invoke_MethodType::compute_offsets();
3874 java_lang_invoke_CallSite::compute_offsets();
3875 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3876 java_security_AccessControlContext::compute_offsets();
3877 // Initialize reflection classes. The layouts of these classes
3878 // changed with the new reflection implementation in JDK 1.4, and
3879 // since the Universe doesn't know what JDK version it is until this
3880 // point we defer computation of these offsets until now.
3881 java_lang_reflect_AccessibleObject::compute_offsets();
3882 java_lang_reflect_Method::compute_offsets();
3883 java_lang_reflect_Constructor::compute_offsets();
3884 java_lang_reflect_Field::compute_offsets();
3885 java_nio_Buffer::compute_offsets();
3886 reflect_ConstantPool::compute_offsets();
3887 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3888 java_lang_reflect_Parameter::compute_offsets();
3889 java_lang_Module::compute_offsets();
3890 java_lang_StackFrameInfo::compute_offsets();
3891 java_lang_LiveStackFrameInfo::compute_offsets();
3892
3893 // generated interpreter code wants to know about the offsets we just computed:
3894 AbstractAssembler::update_delayed_values();
3895 }
3896
3897 #ifndef PRODUCT
3898
3899 // These functions exist to assert the validity of hard-coded field offsets to guard
3900 // against changes in the class files
3901
3902 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3903 EXCEPTION_MARK;
3904 fieldDescriptor fd;
3905 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3906 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3907 InstanceKlass* ik = InstanceKlass::cast(k);
3908 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3909 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3910 if (!ik->find_local_field(f_name, f_sig, &fd)) {
3911 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3912 return false;
3913 }
3914 if (fd.is_static()) {
3915 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3916 return false;
3917 }
3918 if (fd.offset() == hardcoded_offset ) {
3919 return true;
3920 } else {
3921 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3922 klass_name, field_name, hardcoded_offset, fd.offset());
3923 return false;
3924 }
3925 }
3926
3927
3928 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3929 EXCEPTION_MARK;
3930 fieldDescriptor fd;
3931 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3932 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3933 InstanceKlass* ik = InstanceKlass::cast(k);
3934 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3935 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3936 if (!ik->find_local_field(f_name, f_sig, &fd)) {
3937 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3938 return false;
3939 }
3940 if (!fd.is_static()) {
3941 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3942 return false;
3943 }
3944 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3945 return true;
3946 } else {
3947 tty->print_cr("Offset of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_offset, fd.offset() - InstanceMirrorKlass::offset_of_static_fields());
3948 return false;
3949 }
3950 }
3951
3952
3953 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3954 EXCEPTION_MARK;
3955 fieldDescriptor fd;
3956 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3957 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3958 InstanceKlass* ik = InstanceKlass::cast(k);
3959 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3960 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3961 if (!ik->find_local_field(f_name, f_sig, &fd)) {
3962 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3963 return false;
3964 }
3965 if (!fd.is_static() || !fd.has_initial_value()) {
3966 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3967 return false;
3968 }
3969 if (!fd.initial_value_tag().is_int()) {
3970 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3971 return false;
3972 }
3973 jint field_value = fd.int_initial_value();
3974 if (field_value == hardcoded_constant) {
3975 return true;
3976 } else {
3977 tty->print_cr("Constant value of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_constant, field_value);
3978 return false;
3979 }
3980 }
3981
3982
3983 // Check the hard-coded field offsets of all the classes in this file
3984
3985 void JavaClasses::check_offsets() {
3986 bool valid = true;
3987
3988 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3989 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3990
3991 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3992 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3993
3994 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3995 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3996
3997 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3998 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3999
4000 // java.lang.String
4001
4002 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B");
4003 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
4004 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B");
4005
4006 // java.lang.Class
4007
4008 // Fake fields
4009 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
4010 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
4011
4012 // java.lang.Throwable
4013
4014 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
4015 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
4016 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
4017 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I");
4018
4019 // Boxed primitive objects (java_lang_boxing_object)
4020
4021 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4022 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4023 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4024 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4025 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4026 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4027 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4028 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4029
4030 // java.lang.ClassLoader
4031
4032 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
4033
4034 // java.lang.System
4035
4036 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
4037 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
4038 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
4039 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
4040
4041 // java.lang.StackTraceElement
4042
4043 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClassObject, "Ljava/lang/Class;");
4044 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, classLoaderName, "Ljava/lang/String;");
4045 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleName, "Ljava/lang/String;");
4046 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleVersion, "Ljava/lang/String;");
4047 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
4048 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
4049 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
4050 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
4051
4052 // java.lang.ref.Reference
4053
4054 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4055 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4056 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4057 // Fake field
4058 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4059
4060 // java.lang.ref.SoftReference
4061
4062 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
4063 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
4064
4065 // java.lang.AssertionStatusDirectives
4066 //
4067 // The CheckAssertionStatusDirectives boolean can be removed from here and
4068 // globals.hpp after the AssertionStatusDirectives class has been integrated
4069 // into merlin "for some time." Without it, the vm will fail with early
4070 // merlin builds.
4071
4072 if (CheckAssertionStatusDirectives) {
4073 const char* nm = "java/lang/AssertionStatusDirectives";
4074 const char* sig = "[Ljava/lang/String;";
4075 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
4076 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
4077 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
4078 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
4079 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
4080 }
4081
4082 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4083 }
4084
4085 #endif // PRODUCT
4086
4087 int InjectedField::compute_offset() {
4088 InstanceKlass* ik = InstanceKlass::cast(klass());
4089 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4090 if (!may_be_java && !fs.access_flags().is_internal()) {
4091 // Only look at injected fields
4092 continue;
4093 }
4094 if (fs.name() == name() && fs.signature() == signature()) {
4095 return fs.offset();
4096 }
4097 }
4098 ResourceMark rm;
4099 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)" : "");
4100 #ifndef PRODUCT
4101 ik->print();
4102 tty->print_cr("all fields:");
4103 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4104 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4105 }
4106 #endif //PRODUCT
4107 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
4108 return -1;
4109 }
4110
4111 void javaClasses_init() {
4112 JavaClasses::compute_offsets();
4113 JavaClasses::check_offsets();
4114 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4115 }