1 /*
2 * Copyright (c) 1997, 2016, 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 "runtime/fieldDescriptor.hpp"
49 #include "runtime/handles.inline.hpp"
50 #include "runtime/interfaceSupport.hpp"
51 #include "runtime/java.hpp"
52 #include "runtime/javaCalls.hpp"
53 #include "runtime/safepoint.hpp"
54 #include "runtime/thread.inline.hpp"
55 #include "runtime/vframe.hpp"
56 #include "utilities/preserveException.hpp"
57
58 #if INCLUDE_JVMCI
59 #include "jvmci/jvmciJavaClasses.hpp"
60 #endif
61
62 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
63 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
64
65 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
66 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
67
68 InjectedField JavaClasses::_injected_fields[] = {
69 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
70 };
71
72 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
73 return _injected_fields[id].compute_offset();
74 }
75
76
77 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
78 *field_count = 0;
79
80 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
81 if (sid == vmSymbols::NO_SID) {
82 // Only well known classes can inject fields
83 return NULL;
84 }
85
86 int count = 0;
87 int start = -1;
88
89 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
90 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
91 count++; \
92 if (start == -1) start = klass##_##name##_enum; \
93 }
94 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
95 #undef LOOKUP_INJECTED_FIELD
96
97 if (start != -1) {
98 *field_count = count;
99 return _injected_fields + start;
100 }
101 return NULL;
102 }
103
104
105 static bool find_field(InstanceKlass* ik,
106 Symbol* name_symbol, Symbol* signature_symbol,
107 fieldDescriptor* fd,
108 bool is_static = false, bool allow_super = false) {
109 if (allow_super || is_static) {
110 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL;
111 } else {
112 return ik->find_local_field(name_symbol, signature_symbol, fd);
113 }
114 }
115
116 // Helpful routine for computing field offsets at run time rather than hardcoding them
117 static void
118 compute_offset(int &dest_offset,
119 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol,
120 bool is_static = false, bool allow_super = false) {
121 fieldDescriptor fd;
122 InstanceKlass* ik = InstanceKlass::cast(klass);
123 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) {
124 ResourceMark rm;
125 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
126 #ifndef PRODUCT
127 ik->print();
128 tty->print_cr("all fields:");
129 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
130 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
131 }
132 #endif //PRODUCT
133 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
134 }
135 dest_offset = fd.offset();
136 }
137
138 // Same as above but for "optional" offsets that might not be present in certain JDK versions
139 static void
140 compute_optional_offset(int& dest_offset,
141 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol,
142 bool allow_super = false) {
143 fieldDescriptor fd;
144 InstanceKlass* ik = InstanceKlass::cast(klass);
145 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
146 dest_offset = fd.offset();
147 }
148 }
149
150
151 int java_lang_String::value_offset = 0;
152 int java_lang_String::hash_offset = 0;
153 int java_lang_String::coder_offset = 0;
154
155 bool java_lang_String::initialized = false;
156
157 bool java_lang_String::is_instance(oop obj) {
158 return is_instance_inlined(obj);
159 }
160
161 void java_lang_String::compute_offsets() {
162 assert(!initialized, "offsets should be initialized only once");
163
164 Klass* k = SystemDictionary::String_klass();
165 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature());
166 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
167 compute_optional_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature());
168
169 initialized = true;
170 }
171
172 class CompactStringsFixup : public FieldClosure {
173 private:
174 bool _value;
175
176 public:
177 CompactStringsFixup(bool value) : _value(value) {}
178
179 void do_field(fieldDescriptor* fd) {
180 if (fd->name() == vmSymbols::compact_strings_name()) {
181 oop mirror = fd->field_holder()->java_mirror();
182 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
183 assert(mirror != NULL, "String must have mirror already");
184 mirror->bool_field_put(fd->offset(), _value);
185 }
186 }
187 };
188
189 void java_lang_String::set_compact_strings(bool value) {
190 CompactStringsFixup fix(value);
191 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
192 }
193
194 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
195 assert(initialized, "Must be initialized");
196 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
197
198 // Create the String object first, so there's a chance that the String
199 // and the char array it points to end up in the same cache line.
200 oop obj;
201 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
202
203 // Create the char array. The String object must be handlized here
204 // because GC can happen as a result of the allocation attempt.
205 Handle h_obj(THREAD, obj);
206 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
207 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
208
209 // Point the String at the char array
210 obj = h_obj();
211 set_value(obj, buffer);
212 // No need to zero the offset, allocation zero'ed the entire String object
213 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
214 return h_obj;
215 }
216
217 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
218 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
219 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
220 typeArrayOop buffer = value(h_obj());
221 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
222 if (is_latin1) {
223 for (int index = 0; index < length; index++) {
224 buffer->byte_at_put(index, (jbyte)unicode[index]);
225 }
226 } else {
227 for (int index = 0; index < length; index++) {
228 buffer->char_at_put(index, unicode[index]);
229 }
230 }
231
232 #ifdef ASSERT
233 {
234 ResourceMark rm;
235 char* expected = UNICODE::as_utf8(unicode, length);
236 char* actual = as_utf8_string(h_obj());
237 if (strcmp(expected, actual) != 0) {
238 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
239 ShouldNotReachHere();
240 }
241 }
242 #endif
243
244 return h_obj;
245 }
246
247 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
248 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
249 return h_obj();
250 }
251
252 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
253 if (utf8_str == NULL) {
254 return Handle();
255 }
256 bool has_multibyte, is_latin1;
257 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
258 if (!CompactStrings) {
259 has_multibyte = true;
260 is_latin1 = false;
261 }
262
263 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
264 if (length > 0) {
265 if (!has_multibyte) {
266 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
267 } else if (is_latin1) {
268 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
269 } else {
270 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
271 }
272 }
273
274 #ifdef ASSERT
275 // This check is too strict because the input string is not necessarily valid UTF8.
276 // For example, it may be created with arbitrary content via jni_NewStringUTF.
277 /*
278 {
279 ResourceMark rm;
280 const char* expected = utf8_str;
281 char* actual = as_utf8_string(h_obj());
282 if (strcmp(expected, actual) != 0) {
283 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
284 ShouldNotReachHere();
285 }
286 }
287 */
288 #endif
289
290 return h_obj;
291 }
292
293 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
294 Handle h_obj = create_from_str(utf8_str, CHECK_0);
295 return h_obj();
296 }
297
298 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
299 const char* utf8_str = (char*)symbol->bytes();
300 int utf8_len = symbol->utf8_length();
301
302 bool has_multibyte, is_latin1;
303 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
304 if (!CompactStrings) {
305 has_multibyte = true;
306 is_latin1 = false;
307 }
308
309 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
310 if (length > 0) {
311 if (!has_multibyte) {
312 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
313 } else if (is_latin1) {
314 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
315 } else {
316 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
317 }
318 }
319
320 #ifdef ASSERT
321 {
322 ResourceMark rm;
323 const char* expected = symbol->as_utf8();
324 char* actual = as_utf8_string(h_obj());
325 if (strncmp(expected, actual, utf8_len) != 0) {
326 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
327 ShouldNotReachHere();
328 }
329 }
330 #endif
331
332 return h_obj;
333 }
334
335 // Converts a C string to a Java String based on current encoding
336 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
337 assert(str != NULL, "bad arguments");
338
339 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
340 static to_java_string_fn_t _to_java_string_fn = NULL;
341
342 if (_to_java_string_fn == NULL) {
343 void *lib_handle = os::native_java_library();
344 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
345 if (_to_java_string_fn == NULL) {
346 fatal("NewStringPlatform missing");
347 }
348 }
349
350 jstring js = NULL;
351 { JavaThread* thread = (JavaThread*)THREAD;
352 assert(thread->is_Java_thread(), "must be java thread");
353 HandleMark hm(thread);
354 ThreadToNativeFromVM ttn(thread);
355 js = (_to_java_string_fn)(thread->jni_environment(), str);
356 }
357 return Handle(THREAD, JNIHandles::resolve(js));
358 }
359
360 // Converts a Java String to a native C string that can be used for
361 // native OS calls.
362 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
363 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
364 static to_platform_string_fn_t _to_platform_string_fn = NULL;
365
366 if (_to_platform_string_fn == NULL) {
367 void *lib_handle = os::native_java_library();
368 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
369 if (_to_platform_string_fn == NULL) {
370 fatal("GetStringPlatformChars missing");
371 }
372 }
373
374 char *native_platform_string;
375 { JavaThread* thread = (JavaThread*)THREAD;
376 assert(thread->is_Java_thread(), "must be java thread");
377 JNIEnv *env = thread->jni_environment();
378 jstring js = (jstring) JNIHandles::make_local(env, java_string());
379 bool is_copy;
380 HandleMark hm(thread);
381 ThreadToNativeFromVM ttn(thread);
382 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
383 assert(is_copy == JNI_TRUE, "is_copy value changed");
384 JNIHandles::destroy_local(js);
385 }
386 return native_platform_string;
387 }
388
389 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
390 oop obj = java_string();
391 // Typical usage is to convert all '/' to '.' in string.
392 typeArrayOop value = java_lang_String::value(obj);
393 int length = java_lang_String::length(obj);
394 bool is_latin1 = java_lang_String::is_latin1(obj);
395
396 // First check if any from_char exist
397 int index; // Declared outside, used later
398 for (index = 0; index < length; index++) {
399 jchar c = !is_latin1 ? value->char_at(index) :
400 ((jchar) value->byte_at(index)) & 0xff;
401 if (c == from_char) {
402 break;
403 }
404 }
405 if (index == length) {
406 // No from_char, so do not copy.
407 return java_string;
408 }
409
410 // Check if result string will be latin1
411 bool to_is_latin1 = false;
412
413 // Replacement char must be latin1
414 if (CompactStrings && UNICODE::is_latin1(to_char)) {
415 if (is_latin1) {
416 // Source string is latin1 as well
417 to_is_latin1 = true;
418 } else if (!UNICODE::is_latin1(from_char)) {
419 // We are replacing an UTF16 char. Scan string to
420 // check if result can be latin1 encoded.
421 to_is_latin1 = true;
422 for (index = 0; index < length; index++) {
423 jchar c = value->char_at(index);
424 if (c != from_char && !UNICODE::is_latin1(c)) {
425 to_is_latin1 = false;
426 break;
427 }
428 }
429 }
430 }
431
432 // Create new UNICODE (or byte) buffer. Must handlize value because GC
433 // may happen during String and char array creation.
434 typeArrayHandle h_value(THREAD, value);
435 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
436 typeArrayOop from_buffer = h_value();
437 typeArrayOop to_buffer = java_lang_String::value(string());
438
439 // Copy contents
440 for (index = 0; index < length; index++) {
441 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
442 ((jchar) from_buffer->byte_at(index)) & 0xff;
443 if (c == from_char) {
444 c = to_char;
445 }
446 if (!to_is_latin1) {
447 to_buffer->char_at_put(index, c);
448 } else {
449 to_buffer->byte_at_put(index, (jbyte) c);
450 }
451 }
452 return string;
453 }
454
455 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
456 typeArrayOop value = java_lang_String::value(java_string);
457 length = java_lang_String::length(java_string);
458 bool is_latin1 = java_lang_String::is_latin1(java_string);
459
460 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
461 if (result != NULL) {
462 if (!is_latin1) {
463 for (int index = 0; index < length; index++) {
464 result[index] = value->char_at(index);
465 }
466 } else {
467 for (int index = 0; index < length; index++) {
468 result[index] = ((jchar) value->byte_at(index)) & 0xff;
469 }
470 }
471 } else {
472 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
473 }
474 return result;
475 }
476
477 unsigned int java_lang_String::hash_code(oop java_string) {
478 int length = java_lang_String::length(java_string);
479 // Zero length string will hash to zero with String.hashCode() function.
480 if (length == 0) return 0;
481
482 typeArrayOop value = java_lang_String::value(java_string);
483 bool is_latin1 = java_lang_String::is_latin1(java_string);
484
485 if (is_latin1) {
486 return java_lang_String::hash_code(value->byte_at_addr(0), length);
487 } else {
488 return java_lang_String::hash_code(value->char_at_addr(0), length);
489 }
490 }
491
492 char* java_lang_String::as_quoted_ascii(oop java_string) {
493 typeArrayOop value = java_lang_String::value(java_string);
494 int length = java_lang_String::length(java_string);
495 bool is_latin1 = java_lang_String::is_latin1(java_string);
496
497 if (length == 0) return NULL;
498
499 char* result;
500 int result_length;
501 if (!is_latin1) {
502 jchar* base = value->char_at_addr(0);
503 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
504 result = NEW_RESOURCE_ARRAY(char, result_length);
505 UNICODE::as_quoted_ascii(base, length, result, result_length);
506 } else {
507 jbyte* base = value->byte_at_addr(0);
508 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
509 result = NEW_RESOURCE_ARRAY(char, result_length);
510 UNICODE::as_quoted_ascii(base, length, result, result_length);
511 }
512 assert(result_length >= length + 1, "must not be shorter");
513 assert(result_length == (int)strlen(result) + 1, "must match");
514 return result;
515 }
516
517 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
518 oop obj = java_string();
519 typeArrayOop value = java_lang_String::value(obj);
520 int length = java_lang_String::length(obj);
521 bool is_latin1 = java_lang_String::is_latin1(obj);
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(KlassHandle 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(NULL), Handle(NULL), Handle(NULL), CHECK);
757 }
758
759 void java_lang_Class::initialize_mirror_fields(KlassHandle 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.reflect.Module module field in the java_lang_Class mirror
777 void java_lang_Class::set_mirror_module_field(KlassHandle 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.reflect.Module
781 // for java.base is known.
782 assert(!Universe::is_module_initialized(), "Incorrect java.lang.reflect.Module pre module system initialization");
783 MutexLocker m1(Module_lock, THREAD);
784 // Keep list of classes needing java.base module fixup
785 if (!ModuleEntryTable::javabase_defined()) {
786 if (fixup_module_field_list() == NULL) {
787 GrowableArray<Klass*>* list =
788 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
789 set_fixup_module_field_list(list);
790 }
791 k->class_loader_data()->inc_keep_alive();
792 fixup_module_field_list()->push(k());
793 } else {
794 // java.base was defined at some point between calling create_mirror()
795 // and obtaining the Module_lock, patch this particular class with java.base.
796 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
797 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
798 "Setting class module field, java.base should be defined");
799 Handle javabase_handle(THREAD, JNIHandles::resolve(javabase_entry->module()));
800 set_module(mirror(), javabase_handle());
801 }
802 } else {
803 assert(Universe::is_module_initialized() ||
804 (ModuleEntryTable::javabase_defined() &&
805 (module() == JNIHandles::resolve(ModuleEntryTable::javabase_moduleEntry()->module()))),
806 "Incorrect java.lang.reflect.Module specification while creating mirror");
807 set_module(mirror(), module());
808 }
809 }
810
811 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
812 Handle module, Handle protection_domain, TRAPS) {
813 assert(k->java_mirror() == NULL, "should only assign mirror once");
814 // Use this moment of initialization to cache modifier_flags also,
815 // to support Class.getModifiers(). Instance classes recalculate
816 // the cached flags after the class file is parsed, but before the
817 // class is put into the system dictionary.
818 int computed_modifiers = k->compute_modifier_flags(CHECK);
819 k->set_modifier_flags(computed_modifiers);
820 // Class_klass has to be loaded because it is used to allocate
821 // the mirror.
822 if (SystemDictionary::Class_klass_loaded()) {
823 // Allocate mirror (java.lang.Class instance)
824 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
825
826 // Setup indirection from mirror->klass
827 if (!k.is_null()) {
828 java_lang_Class::set_klass(mirror(), k());
829 }
830
831 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
832 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
833
834 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
835
836 // It might also have a component mirror. This mirror must already exist.
837 if (k->is_array_klass()) {
838 Handle comp_mirror;
839 if (k->is_typeArray_klass()) {
840 BasicType type = TypeArrayKlass::cast(k())->element_type();
841 comp_mirror = Universe::java_mirror(type);
842 } else {
843 assert(k->is_objArray_klass(), "Must be");
844 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
845 assert(element_klass != NULL, "Must have an element klass");
846 comp_mirror = element_klass->java_mirror();
847 }
848 assert(comp_mirror.not_null(), "must have a mirror");
849
850 // Two-way link between the array klass and its component mirror:
851 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
852 set_component_mirror(mirror(), comp_mirror());
853 set_array_klass(comp_mirror(), k());
854 } else {
855 assert(k->is_instance_klass(), "Must be");
856
857 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
858 if (HAS_PENDING_EXCEPTION) {
859 // If any of the fields throws an exception like OOM remove the klass field
860 // from the mirror so GC doesn't follow it after the klass has been deallocated.
861 // This mirror looks like a primitive type, which logically it is because it
862 // it represents no class.
863 java_lang_Class::set_klass(mirror(), NULL);
864 return;
865 }
866 }
867
868 // set the classLoader field in the java_lang_Class instance
869 assert(class_loader() == k->class_loader(), "should be same");
870 set_class_loader(mirror(), class_loader());
871
872 // set the module field in the java_lang_Class instance
873 set_mirror_module_field(k, mirror, module, THREAD);
874
875 // Setup indirection from klass->mirror last
876 // after any exceptions can happen during allocations.
877 if (!k.is_null()) {
878 k->set_java_mirror(mirror());
879 }
880 } else {
881 if (fixup_mirror_list() == NULL) {
882 GrowableArray<Klass*>* list =
883 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
884 set_fixup_mirror_list(list);
885 }
886 fixup_mirror_list()->push(k());
887 }
888 }
889
890 void java_lang_Class::fixup_module_field(KlassHandle k, Handle module) {
891 assert(_module_offset != 0, "must have been computed already");
892 java_lang_Class::set_module(k->java_mirror(), module());
893 }
894
895 int java_lang_Class::oop_size(oop java_class) {
896 assert(_oop_size_offset != 0, "must be set");
897 int size = java_class->int_field(_oop_size_offset);
898 assert(size > 0, "Oop size must be greater than zero, not %d", size);
899 return size;
900 }
901
902 void java_lang_Class::set_oop_size(oop java_class, int size) {
903 assert(_oop_size_offset != 0, "must be set");
904 assert(size > 0, "Oop size must be greater than zero, not %d", size);
905 java_class->int_field_put(_oop_size_offset, size);
906 }
907
908 int java_lang_Class::static_oop_field_count(oop java_class) {
909 assert(_static_oop_field_count_offset != 0, "must be set");
910 return java_class->int_field(_static_oop_field_count_offset);
911 }
912 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
913 assert(_static_oop_field_count_offset != 0, "must be set");
914 java_class->int_field_put(_static_oop_field_count_offset, size);
915 }
916
917 oop java_lang_Class::protection_domain(oop java_class) {
918 assert(_protection_domain_offset != 0, "must be set");
919 return java_class->obj_field(_protection_domain_offset);
920 }
921 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
922 assert(_protection_domain_offset != 0, "must be set");
923 java_class->obj_field_put(_protection_domain_offset, pd);
924 }
925
926 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
927 assert(_component_mirror_offset != 0, "must be set");
928 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
929 }
930 oop java_lang_Class::component_mirror(oop java_class) {
931 assert(_component_mirror_offset != 0, "must be set");
932 return java_class->obj_field(_component_mirror_offset);
933 }
934
935 oop java_lang_Class::init_lock(oop java_class) {
936 assert(_init_lock_offset != 0, "must be set");
937 return java_class->obj_field(_init_lock_offset);
938 }
939 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
940 assert(_init_lock_offset != 0, "must be set");
941 java_class->obj_field_put(_init_lock_offset, init_lock);
942 }
943
944 objArrayOop java_lang_Class::signers(oop java_class) {
945 assert(_signers_offset != 0, "must be set");
946 return (objArrayOop)java_class->obj_field(_signers_offset);
947 }
948 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
949 assert(_signers_offset != 0, "must be set");
950 java_class->obj_field_put(_signers_offset, (oop)signers);
951 }
952
953
954 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
955 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
956 if (_class_loader_offset != 0) {
957 java_class->obj_field_put(_class_loader_offset, loader);
958 }
959 }
960
961 oop java_lang_Class::class_loader(oop java_class) {
962 assert(_class_loader_offset != 0, "must be set");
963 return java_class->obj_field(_class_loader_offset);
964 }
965
966 oop java_lang_Class::module(oop java_class) {
967 assert(_module_offset != 0, "must be set");
968 return java_class->obj_field(_module_offset);
969 }
970
971 void java_lang_Class::set_module(oop java_class, oop module) {
972 assert(_module_offset != 0, "must be set");
973 java_class->obj_field_put(_module_offset, module);
974 }
975
976 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
977 // This should be improved by adding a field at the Java level or by
978 // introducing a new VM klass (see comment in ClassFileParser)
979 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
980 if (type != T_VOID) {
981 Klass* aklass = Universe::typeArrayKlassObj(type);
982 assert(aklass != NULL, "correct bootstrap");
983 set_array_klass(java_class, aklass);
984 }
985 #ifdef ASSERT
986 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
987 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
988 #endif
989 return java_class;
990 }
991
992
993 Klass* java_lang_Class::as_Klass(oop java_class) {
994 //%note memory_2
995 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
996 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
997 assert(k == NULL || k->is_klass(), "type check");
998 return k;
999 }
1000
1001
1002 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1003 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1004 java_class->metadata_field_put(_klass_offset, klass);
1005 }
1006
1007
1008 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1009 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1010 Symbol* name = NULL;
1011 bool is_instance = false;
1012 if (is_primitive(java_class)) {
1013 name = vmSymbols::type_signature(primitive_type(java_class));
1014 } else {
1015 Klass* k = as_Klass(java_class);
1016 is_instance = k->is_instance_klass();
1017 name = k->name();
1018 }
1019 if (name == NULL) {
1020 st->print("<null>");
1021 return;
1022 }
1023 if (is_instance) st->print("L");
1024 st->write((char*) name->base(), (int) name->utf8_length());
1025 if (is_instance) st->print(";");
1026 }
1027
1028 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1029 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1030 Symbol* name;
1031 if (is_primitive(java_class)) {
1032 name = vmSymbols::type_signature(primitive_type(java_class));
1033 // Because this can create a new symbol, the caller has to decrement
1034 // the refcount, so make adjustment here and below for symbols returned
1035 // that are not created or incremented due to a successful lookup.
1036 name->increment_refcount();
1037 } else {
1038 Klass* k = as_Klass(java_class);
1039 if (!k->is_instance_klass()) {
1040 name = k->name();
1041 name->increment_refcount();
1042 } else {
1043 ResourceMark rm;
1044 const char* sigstr = k->signature_name();
1045 int siglen = (int) strlen(sigstr);
1046 if (!intern_if_not_found) {
1047 name = SymbolTable::probe(sigstr, siglen);
1048 } else {
1049 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1050 }
1051 }
1052 }
1053 return name;
1054 }
1055
1056 // Returns the Java name for this Java mirror (Resource allocated)
1057 // See Klass::external_name().
1058 // For primitive type Java mirrors, its type name is returned.
1059 const char* java_lang_Class::as_external_name(oop java_class) {
1060 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1061 const char* name = NULL;
1062 if (is_primitive(java_class)) {
1063 name = type2name(primitive_type(java_class));
1064 } else {
1065 name = as_Klass(java_class)->external_name();
1066 }
1067 if (name == NULL) {
1068 name = "<null>";
1069 }
1070 return name;
1071 }
1072
1073 Klass* java_lang_Class::array_klass(oop java_class) {
1074 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1075 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1076 return k;
1077 }
1078
1079
1080 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
1081 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1082 java_class->metadata_field_put(_array_klass_offset, klass);
1083 }
1084
1085
1086 bool java_lang_Class::is_primitive(oop java_class) {
1087 // should assert:
1088 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1089 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1090
1091 #ifdef ASSERT
1092 if (is_primitive) {
1093 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1094 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1095 "Should be either the T_VOID primitive or a java primitive");
1096 }
1097 #endif
1098
1099 return is_primitive;
1100 }
1101
1102
1103 BasicType java_lang_Class::primitive_type(oop java_class) {
1104 assert(java_lang_Class::is_primitive(java_class), "just checking");
1105 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1106 BasicType type = T_VOID;
1107 if (ak != NULL) {
1108 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1109 type = ArrayKlass::cast(ak)->element_type();
1110 } else {
1111 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1112 }
1113 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1114 return type;
1115 }
1116
1117 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1118 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1119 if (is_primitive(java_class)) {
1120 if (reference_klass != NULL)
1121 (*reference_klass) = NULL;
1122 return primitive_type(java_class);
1123 } else {
1124 if (reference_klass != NULL)
1125 (*reference_klass) = as_Klass(java_class);
1126 return T_OBJECT;
1127 }
1128 }
1129
1130
1131 oop java_lang_Class::primitive_mirror(BasicType t) {
1132 oop mirror = Universe::java_mirror(t);
1133 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1134 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1135 return mirror;
1136 }
1137
1138 bool java_lang_Class::offsets_computed = false;
1139 int java_lang_Class::classRedefinedCount_offset = -1;
1140
1141 void java_lang_Class::compute_offsets() {
1142 assert(!offsets_computed, "offsets should be initialized only once");
1143 offsets_computed = true;
1144
1145 Klass* k = SystemDictionary::Class_klass();
1146 // The classRedefinedCount field is only present starting in 1.5,
1147 // so don't go fatal.
1148 compute_optional_offset(classRedefinedCount_offset,
1149 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
1150
1151 // Needs to be optional because the old build runs Queens during bootstrapping
1152 // and jdk8-9 doesn't have coordinated pushes yet.
1153 compute_optional_offset(_class_loader_offset,
1154 k, vmSymbols::classLoader_name(),
1155 vmSymbols::classloader_signature());
1156
1157 compute_offset(_component_mirror_offset,
1158 k, vmSymbols::componentType_name(),
1159 vmSymbols::class_signature());
1160
1161 compute_offset(_module_offset,
1162 k, vmSymbols::module_name(),
1163 vmSymbols::module_signature());
1164
1165 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1166 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1167 // GC treats them the same.
1168 _init_lock_offset = _component_mirror_offset;
1169
1170 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1171 }
1172
1173 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1174 if (classRedefinedCount_offset == -1) {
1175 // If we don't have an offset for it then just return -1 as a marker.
1176 return -1;
1177 }
1178
1179 return the_class_mirror->int_field(classRedefinedCount_offset);
1180 }
1181
1182 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1183 if (classRedefinedCount_offset == -1) {
1184 // If we don't have an offset for it then nothing to set.
1185 return;
1186 }
1187
1188 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1189 }
1190
1191
1192 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1193 // platform thread structure, and a eetop offset which was used for thread
1194 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1195 // merged, so in the HotSpot VM we just use the eetop field for the thread
1196 // instead of the privateInfo_offset.
1197 //
1198 // Note: The stackSize field is only present starting in 1.4.
1199
1200 int java_lang_Thread::_name_offset = 0;
1201 int java_lang_Thread::_group_offset = 0;
1202 int java_lang_Thread::_contextClassLoader_offset = 0;
1203 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1204 int java_lang_Thread::_priority_offset = 0;
1205 int java_lang_Thread::_eetop_offset = 0;
1206 int java_lang_Thread::_daemon_offset = 0;
1207 int java_lang_Thread::_stillborn_offset = 0;
1208 int java_lang_Thread::_stackSize_offset = 0;
1209 int java_lang_Thread::_tid_offset = 0;
1210 int java_lang_Thread::_thread_status_offset = 0;
1211 int java_lang_Thread::_park_blocker_offset = 0;
1212 int java_lang_Thread::_park_event_offset = 0 ;
1213
1214
1215 void java_lang_Thread::compute_offsets() {
1216 assert(_group_offset == 0, "offsets should be initialized only once");
1217
1218 Klass* k = SystemDictionary::Thread_klass();
1219 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1220 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
1221 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
1222 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
1223 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
1224 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1225 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
1226 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
1227 // The stackSize field is only present starting in 1.4, so don't go fatal.
1228 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
1229 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
1230 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
1231 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
1232 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
1233 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
1234 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
1235 vmSymbols::long_signature());
1236 }
1237
1238
1239 JavaThread* java_lang_Thread::thread(oop java_thread) {
1240 return (JavaThread*)java_thread->address_field(_eetop_offset);
1241 }
1242
1243
1244 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1245 java_thread->address_field_put(_eetop_offset, (address)thread);
1246 }
1247
1248
1249 oop java_lang_Thread::name(oop java_thread) {
1250 return java_thread->obj_field(_name_offset);
1251 }
1252
1253
1254 void java_lang_Thread::set_name(oop java_thread, oop name) {
1255 java_thread->obj_field_put(_name_offset, name);
1256 }
1257
1258
1259 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1260 return (ThreadPriority)java_thread->int_field(_priority_offset);
1261 }
1262
1263
1264 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1265 java_thread->int_field_put(_priority_offset, priority);
1266 }
1267
1268
1269 oop java_lang_Thread::threadGroup(oop java_thread) {
1270 return java_thread->obj_field(_group_offset);
1271 }
1272
1273
1274 bool java_lang_Thread::is_stillborn(oop java_thread) {
1275 return java_thread->bool_field(_stillborn_offset) != 0;
1276 }
1277
1278
1279 // We never have reason to turn the stillborn bit off
1280 void java_lang_Thread::set_stillborn(oop java_thread) {
1281 java_thread->bool_field_put(_stillborn_offset, true);
1282 }
1283
1284
1285 bool java_lang_Thread::is_alive(oop java_thread) {
1286 JavaThread* thr = java_lang_Thread::thread(java_thread);
1287 return (thr != NULL);
1288 }
1289
1290
1291 bool java_lang_Thread::is_daemon(oop java_thread) {
1292 return java_thread->bool_field(_daemon_offset) != 0;
1293 }
1294
1295
1296 void java_lang_Thread::set_daemon(oop java_thread) {
1297 java_thread->bool_field_put(_daemon_offset, true);
1298 }
1299
1300 oop java_lang_Thread::context_class_loader(oop java_thread) {
1301 return java_thread->obj_field(_contextClassLoader_offset);
1302 }
1303
1304 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1305 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1306 }
1307
1308
1309 jlong java_lang_Thread::stackSize(oop java_thread) {
1310 if (_stackSize_offset > 0) {
1311 return java_thread->long_field(_stackSize_offset);
1312 } else {
1313 return 0;
1314 }
1315 }
1316
1317 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1318 void java_lang_Thread::set_thread_status(oop java_thread,
1319 java_lang_Thread::ThreadStatus status) {
1320 // The threadStatus is only present starting in 1.5
1321 if (_thread_status_offset > 0) {
1322 java_thread->int_field_put(_thread_status_offset, status);
1323 }
1324 }
1325
1326 // Read thread status value from threadStatus field in java.lang.Thread java class.
1327 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1328 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1329 JavaThread::current()->thread_state() == _thread_in_vm,
1330 "Java Thread is not running in vm");
1331 // The threadStatus is only present starting in 1.5
1332 if (_thread_status_offset > 0) {
1333 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1334 } else {
1335 // All we can easily figure out is if it is alive, but that is
1336 // enough info for a valid unknown status.
1337 // These aren't restricted to valid set ThreadStatus values, so
1338 // use JVMTI values and cast.
1339 JavaThread* thr = java_lang_Thread::thread(java_thread);
1340 if (thr == NULL) {
1341 // the thread hasn't run yet or is in the process of exiting
1342 return NEW;
1343 }
1344 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1345 }
1346 }
1347
1348
1349 jlong java_lang_Thread::thread_id(oop java_thread) {
1350 // The thread ID field is only present starting in 1.5
1351 if (_tid_offset > 0) {
1352 return java_thread->long_field(_tid_offset);
1353 } else {
1354 return 0;
1355 }
1356 }
1357
1358 oop java_lang_Thread::park_blocker(oop java_thread) {
1359 assert(JDK_Version::current().supports_thread_park_blocker() &&
1360 _park_blocker_offset != 0, "Must support parkBlocker field");
1361
1362 if (_park_blocker_offset > 0) {
1363 return java_thread->obj_field(_park_blocker_offset);
1364 }
1365
1366 return NULL;
1367 }
1368
1369 jlong java_lang_Thread::park_event(oop java_thread) {
1370 if (_park_event_offset > 0) {
1371 return java_thread->long_field(_park_event_offset);
1372 }
1373 return 0;
1374 }
1375
1376 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1377 if (_park_event_offset > 0) {
1378 java_thread->long_field_put(_park_event_offset, ptr);
1379 return true;
1380 }
1381 return false;
1382 }
1383
1384
1385 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1386 assert(_thread_status_offset != 0, "Must have thread status");
1387 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1388 switch (status) {
1389 case NEW : return "NEW";
1390 case RUNNABLE : return "RUNNABLE";
1391 case SLEEPING : return "TIMED_WAITING (sleeping)";
1392 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1393 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1394 case PARKED : return "WAITING (parking)";
1395 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1396 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1397 case TERMINATED : return "TERMINATED";
1398 default : return "UNKNOWN";
1399 };
1400 }
1401 int java_lang_ThreadGroup::_parent_offset = 0;
1402 int java_lang_ThreadGroup::_name_offset = 0;
1403 int java_lang_ThreadGroup::_threads_offset = 0;
1404 int java_lang_ThreadGroup::_groups_offset = 0;
1405 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1406 int java_lang_ThreadGroup::_destroyed_offset = 0;
1407 int java_lang_ThreadGroup::_daemon_offset = 0;
1408 int java_lang_ThreadGroup::_nthreads_offset = 0;
1409 int java_lang_ThreadGroup::_ngroups_offset = 0;
1410
1411 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1412 assert(java_thread_group->is_oop(), "thread group must be oop");
1413 return java_thread_group->obj_field(_parent_offset);
1414 }
1415
1416 // ("name as oop" accessor is not necessary)
1417
1418 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1419 oop name = java_thread_group->obj_field(_name_offset);
1420 // ThreadGroup.name can be null
1421 if (name != NULL) {
1422 return java_lang_String::as_utf8_string(name);
1423 }
1424 return NULL;
1425 }
1426
1427 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1428 assert(java_thread_group->is_oop(), "thread group must be oop");
1429 return java_thread_group->int_field(_nthreads_offset);
1430 }
1431
1432 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1433 oop threads = java_thread_group->obj_field(_threads_offset);
1434 assert(threads != NULL, "threadgroups should have threads");
1435 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1436 return objArrayOop(threads);
1437 }
1438
1439 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1440 assert(java_thread_group->is_oop(), "thread group must be oop");
1441 return java_thread_group->int_field(_ngroups_offset);
1442 }
1443
1444 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1445 oop groups = java_thread_group->obj_field(_groups_offset);
1446 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1447 return objArrayOop(groups);
1448 }
1449
1450 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1451 assert(java_thread_group->is_oop(), "thread group must be oop");
1452 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1453 }
1454
1455 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1456 assert(java_thread_group->is_oop(), "thread group must be oop");
1457 return java_thread_group->bool_field(_destroyed_offset) != 0;
1458 }
1459
1460 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1461 assert(java_thread_group->is_oop(), "thread group must be oop");
1462 return java_thread_group->bool_field(_daemon_offset) != 0;
1463 }
1464
1465 void java_lang_ThreadGroup::compute_offsets() {
1466 assert(_parent_offset == 0, "offsets should be initialized only once");
1467
1468 Klass* k = SystemDictionary::ThreadGroup_klass();
1469
1470 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1471 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1472 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1473 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1474 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1475 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1476 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1477 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1478 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1479 }
1480
1481
1482 void java_lang_Throwable::compute_offsets() {
1483 Klass* k = SystemDictionary::Throwable_klass();
1484 compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature());
1485 }
1486
1487 oop java_lang_Throwable::unassigned_stacktrace() {
1488 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1489 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1490 if (UseCompressedOops) {
1491 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1492 } else {
1493 return oopDesc::load_decode_heap_oop((oop*)addr);
1494 }
1495 }
1496
1497 oop java_lang_Throwable::backtrace(oop throwable) {
1498 return throwable->obj_field_acquire(backtrace_offset);
1499 }
1500
1501
1502 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1503 throwable->release_obj_field_put(backtrace_offset, value);
1504 }
1505
1506 int java_lang_Throwable::depth(oop throwable) {
1507 return throwable->int_field(depth_offset);
1508 }
1509
1510 void java_lang_Throwable::set_depth(oop throwable, int value) {
1511 throwable->int_field_put(depth_offset, value);
1512 }
1513
1514 oop java_lang_Throwable::message(Handle throwable) {
1515 return throwable->obj_field(detailMessage_offset);
1516 }
1517
1518
1519 // Return Symbol for detailed_message or NULL
1520 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1521 PRESERVE_EXCEPTION_MARK; // Keep original exception
1522 oop detailed_message = java_lang_Throwable::message(throwable);
1523 if (detailed_message != NULL) {
1524 return java_lang_String::as_symbol(detailed_message, THREAD);
1525 }
1526 return NULL;
1527 }
1528
1529 void java_lang_Throwable::set_message(oop throwable, oop value) {
1530 throwable->obj_field_put(detailMessage_offset, value);
1531 }
1532
1533
1534 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1535 throwable->obj_field_put(stackTrace_offset, st_element_array);
1536 }
1537
1538 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1539 set_stacktrace(throwable, NULL);
1540 }
1541
1542
1543 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1544 ResourceMark rm;
1545 Klass* k = throwable->klass();
1546 assert(k != NULL, "just checking");
1547 st->print("%s", k->external_name());
1548 oop msg = message(throwable);
1549 if (msg != NULL) {
1550 st->print(": %s", java_lang_String::as_utf8_string(msg));
1551 }
1552 }
1553
1554 // After this many redefines, the stack trace is unreliable.
1555 const int MAX_VERSION = USHRT_MAX;
1556
1557 static inline bool version_matches(Method* method, int version) {
1558 assert(version < MAX_VERSION, "version is too big");
1559 return method != NULL && (method->constants()->version() == version);
1560 }
1561
1562
1563 // This class provides a simple wrapper over the internal structure of
1564 // exception backtrace to insulate users of the backtrace from needing
1565 // to know what it looks like.
1566 class BacktraceBuilder: public StackObj {
1567 friend class BacktraceIterator;
1568 private:
1569 Handle _backtrace;
1570 objArrayOop _head;
1571 typeArrayOop _methods;
1572 typeArrayOop _bcis;
1573 objArrayOop _mirrors;
1574 typeArrayOop _cprefs; // needed to insulate method name against redefinition
1575 int _index;
1576 NoSafepointVerifier _nsv;
1577
1578 enum {
1579 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1580 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1581 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1582 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset,
1583 trace_next_offset = java_lang_Throwable::trace_next_offset,
1584 trace_size = java_lang_Throwable::trace_size,
1585 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1586 };
1587
1588 // get info out of chunks
1589 static typeArrayOop get_methods(objArrayHandle chunk) {
1590 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1591 assert(methods != NULL, "method array should be initialized in backtrace");
1592 return methods;
1593 }
1594 static typeArrayOop get_bcis(objArrayHandle chunk) {
1595 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1596 assert(bcis != NULL, "bci array should be initialized in backtrace");
1597 return bcis;
1598 }
1599 static objArrayOop get_mirrors(objArrayHandle chunk) {
1600 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1601 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1602 return mirrors;
1603 }
1604 static typeArrayOop get_cprefs(objArrayHandle chunk) {
1605 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1606 assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1607 return cprefs;
1608 }
1609
1610 public:
1611
1612 // constructor for new backtrace
1613 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1614 expand(CHECK);
1615 _backtrace = _head;
1616 _index = 0;
1617 }
1618
1619 BacktraceBuilder(objArrayHandle backtrace) {
1620 _methods = get_methods(backtrace);
1621 _bcis = get_bcis(backtrace);
1622 _mirrors = get_mirrors(backtrace);
1623 _cprefs = get_cprefs(backtrace);
1624 assert(_methods->length() == _bcis->length() &&
1625 _methods->length() == _mirrors->length(),
1626 "method and source information arrays should match");
1627
1628 // head is the preallocated backtrace
1629 _backtrace = _head = backtrace();
1630 _index = 0;
1631 }
1632
1633 void expand(TRAPS) {
1634 objArrayHandle old_head(THREAD, _head);
1635 PauseNoSafepointVerifier pnsv(&_nsv);
1636
1637 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1638 objArrayHandle new_head(THREAD, head);
1639
1640 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1641 typeArrayHandle new_methods(THREAD, methods);
1642
1643 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1644 typeArrayHandle new_bcis(THREAD, bcis);
1645
1646 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1647 objArrayHandle new_mirrors(THREAD, mirrors);
1648
1649 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1650 typeArrayHandle new_cprefs(THREAD, cprefs);
1651
1652 if (!old_head.is_null()) {
1653 old_head->obj_at_put(trace_next_offset, new_head());
1654 }
1655 new_head->obj_at_put(trace_methods_offset, new_methods());
1656 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1657 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1658 new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1659
1660 _head = new_head();
1661 _methods = new_methods();
1662 _bcis = new_bcis();
1663 _mirrors = new_mirrors();
1664 _cprefs = new_cprefs();
1665 _index = 0;
1666 }
1667
1668 oop backtrace() {
1669 return _backtrace();
1670 }
1671
1672 inline void push(Method* method, int bci, TRAPS) {
1673 // Smear the -1 bci to 0 since the array only holds unsigned
1674 // shorts. The later line number lookup would just smear the -1
1675 // to a 0 even if it could be recorded.
1676 if (bci == SynchronizationEntryBCI) bci = 0;
1677
1678 if (_index >= trace_chunk_size) {
1679 methodHandle mhandle(THREAD, method);
1680 expand(CHECK);
1681 method = mhandle();
1682 }
1683
1684 _methods->short_at_put(_index, method->orig_method_idnum());
1685 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
1686 _cprefs->short_at_put(_index, method->name_index());
1687
1688 // We need to save the mirrors in the backtrace to keep the class
1689 // from being unloaded while we still have this stack trace.
1690 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1691 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1692 _index++;
1693 }
1694
1695 };
1696
1697 struct BacktraceElement : public StackObj {
1698 int _method_id;
1699 int _bci;
1700 int _version;
1701 int _cpref;
1702 Handle _mirror;
1703 BacktraceElement(Handle mirror, int mid, int version, int bci, int cpref) :
1704 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _cpref(cpref) {}
1705 };
1706
1707 class BacktraceIterator : public StackObj {
1708 int _index;
1709 objArrayHandle _result;
1710 objArrayHandle _mirrors;
1711 typeArrayHandle _methods;
1712 typeArrayHandle _bcis;
1713 typeArrayHandle _cprefs;
1714
1715 void init(objArrayHandle result, Thread* thread) {
1716 // Get method id, bci, version and mirror from chunk
1717 _result = result;
1718 if (_result.not_null()) {
1719 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
1720 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
1721 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
1722 _cprefs = typeArrayHandle(thread, BacktraceBuilder::get_cprefs(_result));
1723 _index = 0;
1724 }
1725 }
1726 public:
1727 BacktraceIterator(objArrayHandle result, Thread* thread) {
1728 init(result, thread);
1729 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
1730 }
1731
1732 BacktraceElement next(Thread* thread) {
1733 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
1734 _methods->short_at(_index),
1735 Backtrace::version_at(_bcis->int_at(_index)),
1736 Backtrace::bci_at(_bcis->int_at(_index)),
1737 _cprefs->short_at(_index));
1738 _index++;
1739
1740 if (_index >= java_lang_Throwable::trace_chunk_size) {
1741 int next_offset = java_lang_Throwable::trace_next_offset;
1742 // Get next chunk
1743 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
1744 init(result, thread);
1745 }
1746 return e;
1747 }
1748
1749 bool repeat() {
1750 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
1751 }
1752 };
1753
1754
1755 // Print stack trace element to resource allocated buffer
1756 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
1757 int version, int bci, int cpref) {
1758 ResourceMark rm;
1759
1760 // Get strings and string lengths
1761 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1762 const char* klass_name = holder->external_name();
1763 int buf_len = (int)strlen(klass_name);
1764
1765 Method* method = holder->method_with_orig_idnum(method_id, version);
1766
1767 // The method can be NULL if the requested class version is gone
1768 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1769 char* method_name = sym->as_C_string();
1770 buf_len += (int)strlen(method_name);
1771
1772 char* source_file_name = NULL;
1773 Symbol* source = Backtrace::get_source_file_name(holder, version);
1774 if (source != NULL) {
1775 source_file_name = source->as_C_string();
1776 buf_len += (int)strlen(source_file_name);
1777 }
1778
1779 char *module_name = NULL, *module_version = NULL;
1780 ModuleEntry* module = holder->module();
1781 if (module->is_named()) {
1782 module_name = module->name()->as_C_string();
1783 buf_len += (int)strlen(module_name);
1784 if (module->version() != NULL) {
1785 module_version = module->version()->as_C_string();
1786 buf_len += (int)strlen(module_version);
1787 }
1788 }
1789
1790 // Allocate temporary buffer with extra space for formatting and line number
1791 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1792
1793 // Print stack trace line in buffer
1794 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
1795
1796 // Print module information
1797 if (module_name != NULL) {
1798 if (module_version != NULL) {
1799 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
1800 } else {
1801 sprintf(buf + (int)strlen(buf), "%s/", module_name);
1802 }
1803 }
1804
1805 if (!version_matches(method, version)) {
1806 strcat(buf, "Redefined)");
1807 } else {
1808 int line_number = Backtrace::get_line_number(method, bci);
1809 if (line_number == -2) {
1810 strcat(buf, "Native Method)");
1811 } else {
1812 if (source_file_name != NULL && (line_number != -1)) {
1813 // Sourcename and linenumber
1814 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
1815 } else if (source_file_name != NULL) {
1816 // Just sourcename
1817 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
1818 } else {
1819 // Neither sourcename nor linenumber
1820 sprintf(buf + (int)strlen(buf), "Unknown Source)");
1821 }
1822 CompiledMethod* nm = method->code();
1823 if (WizardMode && nm != NULL) {
1824 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1825 }
1826 }
1827 }
1828
1829 st->print_cr("%s", buf);
1830 }
1831
1832 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
1833 Handle mirror = method->method_holder()->java_mirror();
1834 int method_id = method->orig_method_idnum();
1835 int version = method->constants()->version();
1836 int cpref = method->name_index();
1837 print_stack_element_to_stream(st, mirror, method_id, version, bci, cpref);
1838 }
1839
1840 /**
1841 * Print the throwable message and its stack trace plus all causes by walking the
1842 * cause chain. The output looks the same as of Throwable.printStackTrace().
1843 */
1844 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
1845 // First, print the message.
1846 print(throwable, st);
1847 st->cr();
1848
1849 // Now print the stack trace.
1850 Thread* THREAD = Thread::current();
1851 while (throwable.not_null()) {
1852 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
1853 if (result.is_null()) {
1854 st->print_raw_cr("\t<<no stack trace available>>");
1855 return;
1856 }
1857 BacktraceIterator iter(result, THREAD);
1858
1859 while (iter.repeat()) {
1860 BacktraceElement bte = iter.next(THREAD);
1861 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._cpref);
1862 }
1863 {
1864 // Call getCause() which doesn't necessarily return the _cause field.
1865 EXCEPTION_MARK;
1866 JavaValue cause(T_OBJECT);
1867 JavaCalls::call_virtual(&cause,
1868 throwable,
1869 KlassHandle(THREAD, throwable->klass()),
1870 vmSymbols::getCause_name(),
1871 vmSymbols::void_throwable_signature(),
1872 THREAD);
1873 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1874 if (HAS_PENDING_EXCEPTION) {
1875 CLEAR_PENDING_EXCEPTION;
1876 throwable = Handle();
1877 } else {
1878 throwable = Handle(THREAD, (oop) cause.get_jobject());
1879 if (throwable.not_null()) {
1880 st->print("Caused by: ");
1881 print(throwable, st);
1882 st->cr();
1883 }
1884 }
1885 }
1886 }
1887 }
1888
1889 /**
1890 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
1891 */
1892 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
1893 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
1894 JavaValue result(T_VOID);
1895 JavaCalls::call_virtual(&result,
1896 throwable,
1897 KlassHandle(THREAD, SystemDictionary::Throwable_klass()),
1898 vmSymbols::printStackTrace_name(),
1899 vmSymbols::void_method_signature(),
1900 THREAD);
1901 }
1902
1903 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
1904 if (!StackTraceInThrowable) return;
1905 ResourceMark rm(THREAD);
1906
1907 // Start out by clearing the backtrace for this object, in case the VM
1908 // runs out of memory while allocating the stack trace
1909 set_backtrace(throwable(), NULL);
1910 // Clear lazily constructed Java level stacktrace if refilling occurs
1911 // This is unnecessary in 1.7+ but harmless
1912 clear_stacktrace(throwable());
1913
1914 int max_depth = MaxJavaStackTraceDepth;
1915 JavaThread* thread = (JavaThread*)THREAD;
1916
1917 BacktraceBuilder bt(CHECK);
1918
1919 // If there is no Java frame just return the method that was being called
1920 // with bci 0
1921 if (!thread->has_last_Java_frame()) {
1922 if (max_depth >= 1 && method() != NULL) {
1923 bt.push(method(), 0, CHECK);
1924 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
1925 set_depth(throwable(), 1);
1926 set_backtrace(throwable(), bt.backtrace());
1927 }
1928 return;
1929 }
1930
1931 // Instead of using vframe directly, this version of fill_in_stack_trace
1932 // basically handles everything by hand. This significantly improved the
1933 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1934 // See bug 6333838 for more details.
1935 // The "ASSERT" here is to verify this method generates the exactly same stack
1936 // trace as utilizing vframe.
1937 #ifdef ASSERT
1938 vframeStream st(thread);
1939 methodHandle st_method(THREAD, st.method());
1940 #endif
1941 int total_count = 0;
1942 RegisterMap map(thread, false);
1943 int decode_offset = 0;
1944 CompiledMethod* nm = NULL;
1945 bool skip_fillInStackTrace_check = false;
1946 bool skip_throwableInit_check = false;
1947 bool skip_hidden = !ShowHiddenFrames;
1948
1949 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1950 Method* method = NULL;
1951 int bci = 0;
1952
1953 // Compiled java method case.
1954 if (decode_offset != 0) {
1955 DebugInfoReadStream stream(nm, decode_offset);
1956 decode_offset = stream.read_int();
1957 method = (Method*)nm->metadata_at(stream.read_int());
1958 bci = stream.read_bci();
1959 } else {
1960 if (fr.is_first_frame()) break;
1961 address pc = fr.pc();
1962 if (fr.is_interpreted_frame()) {
1963 address bcp = fr.interpreter_frame_bcp();
1964 method = fr.interpreter_frame_method();
1965 bci = method->bci_from(bcp);
1966 fr = fr.sender(&map);
1967 } else {
1968 CodeBlob* cb = fr.cb();
1969 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1970 // but non nmethod
1971 fr = fr.sender(&map);
1972 if (cb == NULL || !cb->is_compiled()) {
1973 continue;
1974 }
1975 nm = cb->as_compiled_method();
1976 if (nm->method()->is_native()) {
1977 method = nm->method();
1978 bci = 0;
1979 } else {
1980 PcDesc* pd = nm->pc_desc_at(pc);
1981 decode_offset = pd->scope_decode_offset();
1982 // if decode_offset is not equal to 0, it will execute the
1983 // "compiled java method case" at the beginning of the loop.
1984 continue;
1985 }
1986 }
1987 }
1988 #ifdef ASSERT
1989 assert(st_method() == method && st.bci() == bci,
1990 "Wrong stack trace");
1991 st.next();
1992 // vframeStream::method isn't GC-safe so store off a copy
1993 // of the Method* in case we GC.
1994 if (!st.at_end()) {
1995 st_method = st.method();
1996 }
1997 #endif
1998
1999 // the format of the stacktrace will be:
2000 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2001 // - 0 or more <init> methods for the exception class (skipped)
2002 // - rest of the stack
2003
2004 if (!skip_fillInStackTrace_check) {
2005 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2006 throwable->is_a(method->method_holder())) {
2007 continue;
2008 }
2009 else {
2010 skip_fillInStackTrace_check = true; // gone past them all
2011 }
2012 }
2013 if (!skip_throwableInit_check) {
2014 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2015
2016 // skip <init> methods of the exception class and superclasses
2017 // This is simlar to classic VM.
2018 if (method->name() == vmSymbols::object_initializer_name() &&
2019 throwable->is_a(method->method_holder())) {
2020 continue;
2021 } else {
2022 // there are none or we've seen them all - either way stop checking
2023 skip_throwableInit_check = true;
2024 }
2025 }
2026 if (method->is_hidden()) {
2027 if (skip_hidden) continue;
2028 }
2029 bt.push(method, bci, CHECK);
2030 total_count++;
2031 }
2032
2033 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2034
2035 // Put completed stack trace into throwable object
2036 set_backtrace(throwable(), bt.backtrace());
2037 set_depth(throwable(), total_count);
2038 }
2039
2040 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2041 // No-op if stack trace is disabled
2042 if (!StackTraceInThrowable) {
2043 return;
2044 }
2045
2046 // Disable stack traces for some preallocated out of memory errors
2047 if (!Universe::should_fill_in_stack_trace(throwable)) {
2048 return;
2049 }
2050
2051 PRESERVE_EXCEPTION_MARK;
2052
2053 JavaThread* thread = JavaThread::active();
2054 fill_in_stack_trace(throwable, method, thread);
2055 // ignore exceptions thrown during stack trace filling
2056 CLEAR_PENDING_EXCEPTION;
2057 }
2058
2059 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2060 // Allocate stack trace - backtrace is created but not filled in
2061
2062 // No-op if stack trace is disabled
2063 if (!StackTraceInThrowable) return;
2064 BacktraceBuilder bt(CHECK); // creates a backtrace
2065 set_backtrace(throwable(), bt.backtrace());
2066 }
2067
2068
2069 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2070 // Fill in stack trace into preallocated backtrace (no GC)
2071
2072 // No-op if stack trace is disabled
2073 if (!StackTraceInThrowable) return;
2074
2075 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2076
2077 JavaThread* THREAD = JavaThread::current();
2078
2079 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2080 assert(backtrace.not_null(), "backtrace should have been preallocated");
2081
2082 ResourceMark rm(THREAD);
2083 vframeStream st(THREAD);
2084
2085 BacktraceBuilder bt(backtrace);
2086
2087 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2088 // methods as preallocated errors aren't created by "java" code.
2089
2090 // fill in as much stack trace as possible
2091 int chunk_count = 0;
2092 for (;!st.at_end(); st.next()) {
2093 bt.push(st.method(), st.bci(), CHECK);
2094 chunk_count++;
2095
2096 // Bail-out for deep stacks
2097 if (chunk_count >= trace_chunk_size) break;
2098 }
2099 set_depth(throwable(), chunk_count);
2100 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2101
2102 // We support the Throwable immutability protocol defined for Java 7.
2103 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2104 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2105 }
2106
2107 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2108 objArrayHandle stack_trace_array_h, TRAPS) {
2109
2110 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2111 THROW(vmSymbols::java_lang_NullPointerException());
2112 }
2113
2114 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2115
2116 if (stack_trace_array_h->length() != depth(throwable())) {
2117 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2118 }
2119
2120 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2121 BacktraceIterator iter(result, THREAD);
2122
2123 int index = 0;
2124 while (iter.repeat()) {
2125 BacktraceElement bte = iter.next(THREAD);
2126
2127 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2128
2129 if (stack_trace_element.is_null()) {
2130 THROW(vmSymbols::java_lang_NullPointerException());
2131 }
2132
2133 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2134 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2135
2136 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2137 method,
2138 bte._version,
2139 bte._bci,
2140 bte._cpref, CHECK);
2141 }
2142 }
2143
2144 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2145 // Allocate java.lang.StackTraceElement instance
2146 Klass* k = SystemDictionary::StackTraceElement_klass();
2147 assert(k != NULL, "must be loaded in 1.4+");
2148 instanceKlassHandle ik (THREAD, k);
2149 if (ik->should_be_initialized()) {
2150 ik->initialize(CHECK_0);
2151 }
2152
2153 Handle element = ik->allocate_instance_handle(CHECK_0);
2154
2155 int cpref = method->name_index();
2156 int version = method->constants()->version();
2157 fill_in(element, method->method_holder(), method, version, bci, cpref, CHECK_0);
2158 return element();
2159 }
2160
2161 void java_lang_StackTraceElement::fill_in(Handle element,
2162 InstanceKlass* holder, const methodHandle& method,
2163 int version, int bci, int cpref, TRAPS) {
2164 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2165
2166 // Fill in class name
2167 ResourceMark rm(THREAD);
2168 const char* str = holder->external_name();
2169 oop classname = StringTable::intern((char*) str, CHECK);
2170 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2171
2172 // The method can be NULL if the requested class version is gone
2173 Symbol* sym = !method.is_null() ? method->name() : holder->constants()->symbol_at(cpref);
2174
2175 // Fill in method name
2176 oop methodname = StringTable::intern(sym, CHECK);
2177 java_lang_StackTraceElement::set_methodName(element(), methodname);
2178
2179 // Fill in module name and version
2180 ModuleEntry* module = holder->module();
2181 if (module->is_named()) {
2182 oop module_name = StringTable::intern(module->name(), CHECK);
2183 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2184 oop module_version;
2185 if (module->version() != NULL) {
2186 module_version = StringTable::intern(module->version(), CHECK);
2187 } else {
2188 module_version = NULL;
2189 }
2190 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2191 }
2192
2193 if (!version_matches(method(), version)) {
2194 // The method was redefined, accurate line number information isn't available
2195 java_lang_StackTraceElement::set_fileName(element(), NULL);
2196 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2197 } else {
2198 // Fill in source file name and line number.
2199 Symbol* source = Backtrace::get_source_file_name(holder, version);
2200 if (ShowHiddenFrames && source == NULL)
2201 source = vmSymbols::unknown_class_name();
2202 oop filename = StringTable::intern(source, CHECK);
2203 java_lang_StackTraceElement::set_fileName(element(), filename);
2204
2205 int line_number = Backtrace::get_line_number(method, bci);
2206 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2207 }
2208 }
2209
2210 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2211 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2212 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2213 // we should expand MemberName::name when Throwable uses StackTrace
2214 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2215 return method;
2216 }
2217
2218 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci) {
2219 // set Method* or mid/cpref
2220 oop mname = stackFrame->obj_field(_memberName_offset);
2221 InstanceKlass* ik = method->method_holder();
2222 CallInfo info(method(), ik);
2223 MethodHandles::init_method_MemberName(mname, info);
2224 // set bci
2225 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2226 // method may be redefined; store the version
2227 int version = method->constants()->version();
2228 assert((jushort)version == version, "version should be short");
2229 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2230 }
2231
2232 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2233 ResourceMark rm(THREAD);
2234 Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset));
2235 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k()));
2236 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2237
2238 short version = stackFrame->short_field(_version_offset);
2239 short bci = stackFrame->short_field(_bci_offset);
2240 int cpref = method->name_index();
2241 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, cpref, CHECK);
2242 }
2243
2244 void java_lang_StackFrameInfo::compute_offsets() {
2245 Klass* k = SystemDictionary::StackFrameInfo_klass();
2246 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature());
2247 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature());
2248 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::short_signature());
2249 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2250 }
2251
2252 void java_lang_LiveStackFrameInfo::compute_offsets() {
2253 Klass* k = SystemDictionary::LiveStackFrameInfo_klass();
2254 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature());
2255 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature());
2256 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature());
2257 }
2258
2259 void java_lang_reflect_AccessibleObject::compute_offsets() {
2260 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
2261 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
2262 }
2263
2264 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2265 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2266 return (jboolean) reflect->bool_field(override_offset);
2267 }
2268
2269 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2270 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2271 reflect->bool_field_put(override_offset, (int) value);
2272 }
2273
2274 void java_lang_reflect_Method::compute_offsets() {
2275 Klass* k = SystemDictionary::reflect_Method_klass();
2276 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2277 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2278 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
2279 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2280 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2281 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2282 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2283 // The generic signature and annotations fields are only present in 1.5
2284 signature_offset = -1;
2285 annotations_offset = -1;
2286 parameter_annotations_offset = -1;
2287 annotation_default_offset = -1;
2288 type_annotations_offset = -1;
2289 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2290 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2291 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2292 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
2293 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2294 }
2295
2296 Handle java_lang_reflect_Method::create(TRAPS) {
2297 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2298 Klass* klass = SystemDictionary::reflect_Method_klass();
2299 // This class is eagerly initialized during VM initialization, since we keep a refence
2300 // to one of the methods
2301 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2302 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2303 }
2304
2305 oop java_lang_reflect_Method::clazz(oop reflect) {
2306 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2307 return reflect->obj_field(clazz_offset);
2308 }
2309
2310 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2311 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2312 reflect->obj_field_put(clazz_offset, value);
2313 }
2314
2315 int java_lang_reflect_Method::slot(oop reflect) {
2316 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2317 return reflect->int_field(slot_offset);
2318 }
2319
2320 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2321 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2322 reflect->int_field_put(slot_offset, value);
2323 }
2324
2325 oop java_lang_reflect_Method::name(oop method) {
2326 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2327 return method->obj_field(name_offset);
2328 }
2329
2330 void java_lang_reflect_Method::set_name(oop method, oop value) {
2331 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2332 method->obj_field_put(name_offset, value);
2333 }
2334
2335 oop java_lang_reflect_Method::return_type(oop method) {
2336 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2337 return method->obj_field(returnType_offset);
2338 }
2339
2340 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2341 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2342 method->obj_field_put(returnType_offset, value);
2343 }
2344
2345 oop java_lang_reflect_Method::parameter_types(oop method) {
2346 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2347 return method->obj_field(parameterTypes_offset);
2348 }
2349
2350 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2351 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2352 method->obj_field_put(parameterTypes_offset, value);
2353 }
2354
2355 oop java_lang_reflect_Method::exception_types(oop method) {
2356 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2357 return method->obj_field(exceptionTypes_offset);
2358 }
2359
2360 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2361 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2362 method->obj_field_put(exceptionTypes_offset, value);
2363 }
2364
2365 int java_lang_reflect_Method::modifiers(oop method) {
2366 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2367 return method->int_field(modifiers_offset);
2368 }
2369
2370 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2371 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2372 method->int_field_put(modifiers_offset, value);
2373 }
2374
2375 bool java_lang_reflect_Method::has_signature_field() {
2376 return (signature_offset >= 0);
2377 }
2378
2379 oop java_lang_reflect_Method::signature(oop method) {
2380 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2381 assert(has_signature_field(), "signature field must be present");
2382 return method->obj_field(signature_offset);
2383 }
2384
2385 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2386 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2387 assert(has_signature_field(), "signature field must be present");
2388 method->obj_field_put(signature_offset, value);
2389 }
2390
2391 bool java_lang_reflect_Method::has_annotations_field() {
2392 return (annotations_offset >= 0);
2393 }
2394
2395 oop java_lang_reflect_Method::annotations(oop method) {
2396 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2397 assert(has_annotations_field(), "annotations field must be present");
2398 return method->obj_field(annotations_offset);
2399 }
2400
2401 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2402 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2403 assert(has_annotations_field(), "annotations field must be present");
2404 method->obj_field_put(annotations_offset, value);
2405 }
2406
2407 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2408 return (parameter_annotations_offset >= 0);
2409 }
2410
2411 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2412 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2413 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2414 return method->obj_field(parameter_annotations_offset);
2415 }
2416
2417 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2418 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2419 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2420 method->obj_field_put(parameter_annotations_offset, value);
2421 }
2422
2423 bool java_lang_reflect_Method::has_annotation_default_field() {
2424 return (annotation_default_offset >= 0);
2425 }
2426
2427 oop java_lang_reflect_Method::annotation_default(oop method) {
2428 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2429 assert(has_annotation_default_field(), "annotation default field must be present");
2430 return method->obj_field(annotation_default_offset);
2431 }
2432
2433 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2434 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2435 assert(has_annotation_default_field(), "annotation default field must be present");
2436 method->obj_field_put(annotation_default_offset, value);
2437 }
2438
2439 bool java_lang_reflect_Method::has_type_annotations_field() {
2440 return (type_annotations_offset >= 0);
2441 }
2442
2443 oop java_lang_reflect_Method::type_annotations(oop method) {
2444 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2445 assert(has_type_annotations_field(), "type_annotations field must be present");
2446 return method->obj_field(type_annotations_offset);
2447 }
2448
2449 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2450 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2451 assert(has_type_annotations_field(), "type_annotations field must be present");
2452 method->obj_field_put(type_annotations_offset, value);
2453 }
2454
2455 void java_lang_reflect_Constructor::compute_offsets() {
2456 Klass* k = SystemDictionary::reflect_Constructor_klass();
2457 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2458 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2459 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2460 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2461 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2462 // The generic signature and annotations fields are only present in 1.5
2463 signature_offset = -1;
2464 annotations_offset = -1;
2465 parameter_annotations_offset = -1;
2466 type_annotations_offset = -1;
2467 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2468 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2469 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2470 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2471 }
2472
2473 Handle java_lang_reflect_Constructor::create(TRAPS) {
2474 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2475 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2476 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2477 instanceKlassHandle klass (THREAD, k);
2478 // Ensure it is initialized
2479 klass->initialize(CHECK_NH);
2480 return klass->allocate_instance_handle(THREAD);
2481 }
2482
2483 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2484 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2485 return reflect->obj_field(clazz_offset);
2486 }
2487
2488 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2489 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2490 reflect->obj_field_put(clazz_offset, value);
2491 }
2492
2493 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2494 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2495 return constructor->obj_field(parameterTypes_offset);
2496 }
2497
2498 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2499 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2500 constructor->obj_field_put(parameterTypes_offset, value);
2501 }
2502
2503 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2504 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2505 return constructor->obj_field(exceptionTypes_offset);
2506 }
2507
2508 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2509 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2510 constructor->obj_field_put(exceptionTypes_offset, value);
2511 }
2512
2513 int java_lang_reflect_Constructor::slot(oop reflect) {
2514 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2515 return reflect->int_field(slot_offset);
2516 }
2517
2518 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2519 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2520 reflect->int_field_put(slot_offset, value);
2521 }
2522
2523 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2524 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2525 return constructor->int_field(modifiers_offset);
2526 }
2527
2528 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2529 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2530 constructor->int_field_put(modifiers_offset, value);
2531 }
2532
2533 bool java_lang_reflect_Constructor::has_signature_field() {
2534 return (signature_offset >= 0);
2535 }
2536
2537 oop java_lang_reflect_Constructor::signature(oop constructor) {
2538 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2539 assert(has_signature_field(), "signature field must be present");
2540 return constructor->obj_field(signature_offset);
2541 }
2542
2543 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2544 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2545 assert(has_signature_field(), "signature field must be present");
2546 constructor->obj_field_put(signature_offset, value);
2547 }
2548
2549 bool java_lang_reflect_Constructor::has_annotations_field() {
2550 return (annotations_offset >= 0);
2551 }
2552
2553 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2554 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2555 assert(has_annotations_field(), "annotations field must be present");
2556 return constructor->obj_field(annotations_offset);
2557 }
2558
2559 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2560 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2561 assert(has_annotations_field(), "annotations field must be present");
2562 constructor->obj_field_put(annotations_offset, value);
2563 }
2564
2565 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2566 return (parameter_annotations_offset >= 0);
2567 }
2568
2569 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2570 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2571 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2572 return method->obj_field(parameter_annotations_offset);
2573 }
2574
2575 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2576 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2577 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2578 method->obj_field_put(parameter_annotations_offset, value);
2579 }
2580
2581 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2582 return (type_annotations_offset >= 0);
2583 }
2584
2585 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2586 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2587 assert(has_type_annotations_field(), "type_annotations field must be present");
2588 return constructor->obj_field(type_annotations_offset);
2589 }
2590
2591 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2592 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2593 assert(has_type_annotations_field(), "type_annotations field must be present");
2594 constructor->obj_field_put(type_annotations_offset, value);
2595 }
2596
2597 void java_lang_reflect_Field::compute_offsets() {
2598 Klass* k = SystemDictionary::reflect_Field_klass();
2599 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2600 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2601 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2602 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2603 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2604 // The generic signature and annotations fields are only present in 1.5
2605 signature_offset = -1;
2606 annotations_offset = -1;
2607 type_annotations_offset = -1;
2608 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2609 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2610 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2611 }
2612
2613 Handle java_lang_reflect_Field::create(TRAPS) {
2614 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2615 Symbol* name = vmSymbols::java_lang_reflect_Field();
2616 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2617 instanceKlassHandle klass (THREAD, k);
2618 // Ensure it is initialized
2619 klass->initialize(CHECK_NH);
2620 return klass->allocate_instance_handle(THREAD);
2621 }
2622
2623 oop java_lang_reflect_Field::clazz(oop reflect) {
2624 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2625 return reflect->obj_field(clazz_offset);
2626 }
2627
2628 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2629 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2630 reflect->obj_field_put(clazz_offset, value);
2631 }
2632
2633 oop java_lang_reflect_Field::name(oop field) {
2634 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2635 return field->obj_field(name_offset);
2636 }
2637
2638 void java_lang_reflect_Field::set_name(oop field, oop value) {
2639 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2640 field->obj_field_put(name_offset, value);
2641 }
2642
2643 oop java_lang_reflect_Field::type(oop field) {
2644 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2645 return field->obj_field(type_offset);
2646 }
2647
2648 void java_lang_reflect_Field::set_type(oop field, oop value) {
2649 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2650 field->obj_field_put(type_offset, value);
2651 }
2652
2653 int java_lang_reflect_Field::slot(oop reflect) {
2654 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2655 return reflect->int_field(slot_offset);
2656 }
2657
2658 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2659 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2660 reflect->int_field_put(slot_offset, value);
2661 }
2662
2663 int java_lang_reflect_Field::modifiers(oop field) {
2664 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2665 return field->int_field(modifiers_offset);
2666 }
2667
2668 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2669 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2670 field->int_field_put(modifiers_offset, value);
2671 }
2672
2673 bool java_lang_reflect_Field::has_signature_field() {
2674 return (signature_offset >= 0);
2675 }
2676
2677 oop java_lang_reflect_Field::signature(oop field) {
2678 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2679 assert(has_signature_field(), "signature field must be present");
2680 return field->obj_field(signature_offset);
2681 }
2682
2683 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2684 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2685 assert(has_signature_field(), "signature field must be present");
2686 field->obj_field_put(signature_offset, value);
2687 }
2688
2689 bool java_lang_reflect_Field::has_annotations_field() {
2690 return (annotations_offset >= 0);
2691 }
2692
2693 oop java_lang_reflect_Field::annotations(oop field) {
2694 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2695 assert(has_annotations_field(), "annotations field must be present");
2696 return field->obj_field(annotations_offset);
2697 }
2698
2699 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2700 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2701 assert(has_annotations_field(), "annotations field must be present");
2702 field->obj_field_put(annotations_offset, value);
2703 }
2704
2705 bool java_lang_reflect_Field::has_type_annotations_field() {
2706 return (type_annotations_offset >= 0);
2707 }
2708
2709 oop java_lang_reflect_Field::type_annotations(oop field) {
2710 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2711 assert(has_type_annotations_field(), "type_annotations field must be present");
2712 return field->obj_field(type_annotations_offset);
2713 }
2714
2715 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2716 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2717 assert(has_type_annotations_field(), "type_annotations field must be present");
2718 field->obj_field_put(type_annotations_offset, value);
2719 }
2720
2721 void reflect_ConstantPool::compute_offsets() {
2722 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2723 // This null test can be removed post beta
2724 if (k != NULL) {
2725 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2726 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2727 }
2728 }
2729
2730 void java_lang_reflect_Parameter::compute_offsets() {
2731 Klass* k = SystemDictionary::reflect_Parameter_klass();
2732 if(NULL != k) {
2733 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2734 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2735 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2736 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2737 }
2738 }
2739
2740 Handle java_lang_reflect_Parameter::create(TRAPS) {
2741 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2742 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2743 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2744 instanceKlassHandle klass (THREAD, k);
2745 // Ensure it is initialized
2746 klass->initialize(CHECK_NH);
2747 return klass->allocate_instance_handle(THREAD);
2748 }
2749
2750 oop java_lang_reflect_Parameter::name(oop param) {
2751 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2752 return param->obj_field(name_offset);
2753 }
2754
2755 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2757 param->obj_field_put(name_offset, value);
2758 }
2759
2760 int java_lang_reflect_Parameter::modifiers(oop param) {
2761 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2762 return param->int_field(modifiers_offset);
2763 }
2764
2765 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2767 param->int_field_put(modifiers_offset, value);
2768 }
2769
2770 int java_lang_reflect_Parameter::index(oop param) {
2771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2772 return param->int_field(index_offset);
2773 }
2774
2775 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2776 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2777 param->int_field_put(index_offset, value);
2778 }
2779
2780 oop java_lang_reflect_Parameter::executable(oop param) {
2781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2782 return param->obj_field(executable_offset);
2783 }
2784
2785 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2786 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2787 param->obj_field_put(executable_offset, value);
2788 }
2789
2790
2791 int java_lang_reflect_Module::loader_offset;
2792 int java_lang_reflect_Module::name_offset;
2793 int java_lang_reflect_Module::_module_entry_offset = -1;
2794
2795 Handle java_lang_reflect_Module::create(Handle loader, Handle module_name, TRAPS) {
2796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2797
2798 Symbol* name = vmSymbols::java_lang_reflect_Module();
2799 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2800 instanceKlassHandle klass (THREAD, k);
2801
2802 Handle jlrmh = klass->allocate_instance_handle(CHECK_NH);
2803 JavaValue result(T_VOID);
2804 JavaCalls::call_special(&result, jlrmh, KlassHandle(THREAD, klass()),
2805 vmSymbols::object_initializer_name(),
2806 vmSymbols::java_lang_reflect_module_init_signature(),
2807 loader, module_name, CHECK_NH);
2808 return jlrmh;
2809 }
2810
2811 void java_lang_reflect_Module::compute_offsets() {
2812 Klass* k = SystemDictionary::reflect_Module_klass();
2813 if(NULL != k) {
2814 compute_offset(loader_offset, k, vmSymbols::loader_name(), vmSymbols::classloader_signature());
2815 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2816 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2817 }
2818 }
2819
2820
2821 oop java_lang_reflect_Module::loader(oop module) {
2822 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2823 return module->obj_field(loader_offset);
2824 }
2825
2826 void java_lang_reflect_Module::set_loader(oop module, oop value) {
2827 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2828 module->obj_field_put(loader_offset, value);
2829 }
2830
2831 oop java_lang_reflect_Module::name(oop module) {
2832 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2833 return module->obj_field(name_offset);
2834 }
2835
2836 void java_lang_reflect_Module::set_name(oop module, oop value) {
2837 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2838 module->obj_field_put(name_offset, value);
2839 }
2840
2841 ModuleEntry* java_lang_reflect_Module::module_entry(oop module, TRAPS) {
2842 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2843 assert(module != NULL, "module can't be null");
2844 assert(module->is_oop(), "module must be oop");
2845
2846 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
2847 if (module_entry == NULL) {
2848 // If the inject field containing the ModuleEntry* is null then return the
2849 // class loader's unnamed module.
2850 oop loader = java_lang_reflect_Module::loader(module);
2851 Handle h_loader = Handle(THREAD, loader);
2852 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL);
2853 return loader_cld->modules()->unnamed_module();
2854 }
2855 return module_entry;
2856 }
2857
2858 void java_lang_reflect_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
2859 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2860 assert(module != NULL, "module can't be null");
2861 assert(module->is_oop(), "module must be oop");
2862 module->address_field_put(_module_entry_offset, (address)module_entry);
2863 }
2864
2865 Handle reflect_ConstantPool::create(TRAPS) {
2866 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2867 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2868 instanceKlassHandle klass (THREAD, k);
2869 // Ensure it is initialized
2870 klass->initialize(CHECK_NH);
2871 return klass->allocate_instance_handle(THREAD);
2872 }
2873
2874
2875 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2876 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2877 oop mirror = value->pool_holder()->java_mirror();
2878 // Save the mirror to get back the constant pool.
2879 reflect->obj_field_put(_oop_offset, mirror);
2880 }
2881
2882 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
2883 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2884
2885 oop mirror = reflect->obj_field(_oop_offset);
2886 Klass* k = java_lang_Class::as_Klass(mirror);
2887 assert(k->is_instance_klass(), "Must be");
2888
2889 // Get the constant pool back from the klass. Since class redefinition
2890 // merges the new constant pool into the old, this is essentially the
2891 // same constant pool as the original. If constant pool merging is
2892 // no longer done in the future, this will have to change to save
2893 // the original.
2894 return InstanceKlass::cast(k)->constants();
2895 }
2896
2897 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2898 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2899 // This null test can be removed post beta
2900 if (k != NULL) {
2901 compute_offset(_base_offset, k,
2902 vmSymbols::base_name(), vmSymbols::object_signature());
2903 }
2904 }
2905
2906 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2907 Klass* k = SystemDictionary::box_klass(type);
2908 if (k == NULL) return NULL;
2909 instanceKlassHandle h (THREAD, k);
2910 if (!h->is_initialized()) h->initialize(CHECK_0);
2911 return h->allocate_instance(THREAD);
2912 }
2913
2914
2915 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2916 oop box = initialize_and_allocate(type, CHECK_0);
2917 if (box == NULL) return NULL;
2918 switch (type) {
2919 case T_BOOLEAN:
2920 box->bool_field_put(value_offset, value->z);
2921 break;
2922 case T_CHAR:
2923 box->char_field_put(value_offset, value->c);
2924 break;
2925 case T_FLOAT:
2926 box->float_field_put(value_offset, value->f);
2927 break;
2928 case T_DOUBLE:
2929 box->double_field_put(long_value_offset, value->d);
2930 break;
2931 case T_BYTE:
2932 box->byte_field_put(value_offset, value->b);
2933 break;
2934 case T_SHORT:
2935 box->short_field_put(value_offset, value->s);
2936 break;
2937 case T_INT:
2938 box->int_field_put(value_offset, value->i);
2939 break;
2940 case T_LONG:
2941 box->long_field_put(long_value_offset, value->j);
2942 break;
2943 default:
2944 return NULL;
2945 }
2946 return box;
2947 }
2948
2949
2950 BasicType java_lang_boxing_object::basic_type(oop box) {
2951 if (box == NULL) return T_ILLEGAL;
2952 BasicType type = SystemDictionary::box_klass_type(box->klass());
2953 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2954 return T_ILLEGAL;
2955 return type;
2956 }
2957
2958
2959 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2960 BasicType type = SystemDictionary::box_klass_type(box->klass());
2961 switch (type) {
2962 case T_BOOLEAN:
2963 value->z = box->bool_field(value_offset);
2964 break;
2965 case T_CHAR:
2966 value->c = box->char_field(value_offset);
2967 break;
2968 case T_FLOAT:
2969 value->f = box->float_field(value_offset);
2970 break;
2971 case T_DOUBLE:
2972 value->d = box->double_field(long_value_offset);
2973 break;
2974 case T_BYTE:
2975 value->b = box->byte_field(value_offset);
2976 break;
2977 case T_SHORT:
2978 value->s = box->short_field(value_offset);
2979 break;
2980 case T_INT:
2981 value->i = box->int_field(value_offset);
2982 break;
2983 case T_LONG:
2984 value->j = box->long_field(long_value_offset);
2985 break;
2986 default:
2987 return T_ILLEGAL;
2988 } // end switch
2989 return type;
2990 }
2991
2992
2993 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2994 BasicType type = SystemDictionary::box_klass_type(box->klass());
2995 switch (type) {
2996 case T_BOOLEAN:
2997 box->bool_field_put(value_offset, value->z);
2998 break;
2999 case T_CHAR:
3000 box->char_field_put(value_offset, value->c);
3001 break;
3002 case T_FLOAT:
3003 box->float_field_put(value_offset, value->f);
3004 break;
3005 case T_DOUBLE:
3006 box->double_field_put(long_value_offset, value->d);
3007 break;
3008 case T_BYTE:
3009 box->byte_field_put(value_offset, value->b);
3010 break;
3011 case T_SHORT:
3012 box->short_field_put(value_offset, value->s);
3013 break;
3014 case T_INT:
3015 box->int_field_put(value_offset, value->i);
3016 break;
3017 case T_LONG:
3018 box->long_field_put(long_value_offset, value->j);
3019 break;
3020 default:
3021 return T_ILLEGAL;
3022 } // end switch
3023 return type;
3024 }
3025
3026
3027 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3028 switch (type) {
3029 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3030 case T_CHAR: st->print("%d", value->c); break;
3031 case T_BYTE: st->print("%d", value->b); break;
3032 case T_SHORT: st->print("%d", value->s); break;
3033 case T_INT: st->print("%d", value->i); break;
3034 case T_LONG: st->print(INT64_FORMAT, value->j); break;
3035 case T_FLOAT: st->print("%f", value->f); break;
3036 case T_DOUBLE: st->print("%lf", value->d); break;
3037 default: st->print("type %d?", type); break;
3038 }
3039 }
3040
3041 // Support for java_lang_ref_SoftReference
3042
3043 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3044 return ref->long_field(timestamp_offset);
3045 }
3046
3047 jlong java_lang_ref_SoftReference::clock() {
3048 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3049 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3050 return *offset;
3051 }
3052
3053 void java_lang_ref_SoftReference::set_clock(jlong value) {
3054 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3055 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3056 *offset = value;
3057 }
3058
3059 // Support for java_lang_invoke_DirectMethodHandle
3060
3061 int java_lang_invoke_DirectMethodHandle::_member_offset;
3062
3063 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3064 oop member_name = NULL;
3065 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
3066 assert(is_dmh, "a DirectMethodHandle oop is expected");
3067 if (is_dmh) {
3068 member_name = dmh->obj_field(member_offset_in_bytes());
3069 }
3070 return member_name;
3071 }
3072
3073 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3074 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
3075 if (klass_oop != NULL) {
3076 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
3077 }
3078 }
3079
3080 // Support for java_lang_invoke_MethodHandle
3081
3082 int java_lang_invoke_MethodHandle::_type_offset;
3083 int java_lang_invoke_MethodHandle::_form_offset;
3084
3085 int java_lang_invoke_MemberName::_clazz_offset;
3086 int java_lang_invoke_MemberName::_name_offset;
3087 int java_lang_invoke_MemberName::_type_offset;
3088 int java_lang_invoke_MemberName::_flags_offset;
3089 int java_lang_invoke_MemberName::_vmtarget_offset;
3090 int java_lang_invoke_MemberName::_vmloader_offset;
3091 int java_lang_invoke_MemberName::_vmindex_offset;
3092
3093 int java_lang_invoke_LambdaForm::_vmentry_offset;
3094
3095 void java_lang_invoke_MethodHandle::compute_offsets() {
3096 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
3097 if (klass_oop != NULL) {
3098 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
3099 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
3100 }
3101 }
3102
3103 void java_lang_invoke_MemberName::compute_offsets() {
3104 Klass* klass_oop = SystemDictionary::MemberName_klass();
3105 if (klass_oop != NULL) {
3106 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
3107 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
3108 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
3109 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
3110 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3111 }
3112 }
3113
3114 void java_lang_invoke_LambdaForm::compute_offsets() {
3115 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
3116 if (klass_oop != NULL) {
3117 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
3118 }
3119 }
3120
3121 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3122 return obj != NULL && is_subclass(obj->klass());
3123 }
3124
3125
3126 oop java_lang_invoke_MethodHandle::type(oop mh) {
3127 return mh->obj_field(_type_offset);
3128 }
3129
3130 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3131 mh->obj_field_put(_type_offset, mtype);
3132 }
3133
3134 oop java_lang_invoke_MethodHandle::form(oop mh) {
3135 assert(_form_offset != 0, "");
3136 return mh->obj_field(_form_offset);
3137 }
3138
3139 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3140 assert(_form_offset != 0, "");
3141 mh->obj_field_put(_form_offset, lform);
3142 }
3143
3144 /// MemberName accessors
3145
3146 oop java_lang_invoke_MemberName::clazz(oop mname) {
3147 assert(is_instance(mname), "wrong type");
3148 return mname->obj_field(_clazz_offset);
3149 }
3150
3151 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3152 assert(is_instance(mname), "wrong type");
3153 mname->obj_field_put(_clazz_offset, clazz);
3154 }
3155
3156 oop java_lang_invoke_MemberName::name(oop mname) {
3157 assert(is_instance(mname), "wrong type");
3158 return mname->obj_field(_name_offset);
3159 }
3160
3161 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3162 assert(is_instance(mname), "wrong type");
3163 mname->obj_field_put(_name_offset, name);
3164 }
3165
3166 oop java_lang_invoke_MemberName::type(oop mname) {
3167 assert(is_instance(mname), "wrong type");
3168 return mname->obj_field(_type_offset);
3169 }
3170
3171 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3172 assert(is_instance(mname), "wrong type");
3173 mname->obj_field_put(_type_offset, type);
3174 }
3175
3176 int java_lang_invoke_MemberName::flags(oop mname) {
3177 assert(is_instance(mname), "wrong type");
3178 return mname->int_field(_flags_offset);
3179 }
3180
3181 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3182 assert(is_instance(mname), "wrong type");
3183 mname->int_field_put(_flags_offset, flags);
3184 }
3185
3186 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
3187 assert(is_instance(mname), "wrong type");
3188 return (Metadata*)mname->address_field(_vmtarget_offset);
3189 }
3190
3191 bool java_lang_invoke_MemberName::is_method(oop mname) {
3192 assert(is_instance(mname), "must be MemberName");
3193 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3194 }
3195
3196 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
3197 assert(is_instance(mname), "wrong type");
3198 // check the type of the vmtarget
3199 oop dependency = NULL;
3200 if (ref != NULL) {
3201 switch (flags(mname) & (MN_IS_METHOD |
3202 MN_IS_CONSTRUCTOR |
3203 MN_IS_FIELD)) {
3204 case MN_IS_METHOD:
3205 case MN_IS_CONSTRUCTOR:
3206 assert(ref->is_method(), "should be a method");
3207 dependency = ((Method*)ref)->method_holder()->java_mirror();
3208 break;
3209 case MN_IS_FIELD:
3210 assert(ref->is_klass(), "should be a class");
3211 dependency = ((Klass*)ref)->java_mirror();
3212 break;
3213 default:
3214 ShouldNotReachHere();
3215 }
3216 }
3217 mname->address_field_put(_vmtarget_offset, (address)ref);
3218 // Add a reference to the loader (actually mirror because anonymous classes will not have
3219 // distinct loaders) to ensure the metadata is kept alive
3220 // This mirror may be different than the one in clazz field.
3221 mname->obj_field_put(_vmloader_offset, dependency);
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 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3235 assert(is_instance(lform), "wrong type");
3236 return lform->obj_field(_vmentry_offset);
3237 }
3238
3239
3240 // Support for java_lang_invoke_MethodType
3241
3242 int java_lang_invoke_MethodType::_rtype_offset;
3243 int java_lang_invoke_MethodType::_ptypes_offset;
3244
3245 void java_lang_invoke_MethodType::compute_offsets() {
3246 Klass* k = SystemDictionary::MethodType_klass();
3247 if (k != NULL) {
3248 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
3249 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
3250 }
3251 }
3252
3253 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3254 st->print("(");
3255 objArrayOop pts = ptypes(mt);
3256 for (int i = 0, limit = pts->length(); i < limit; i++) {
3257 java_lang_Class::print_signature(pts->obj_at(i), st);
3258 }
3259 st->print(")");
3260 java_lang_Class::print_signature(rtype(mt), st);
3261 }
3262
3263 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3264 ResourceMark rm;
3265 stringStream buffer(128);
3266 print_signature(mt, &buffer);
3267 const char* sigstr = buffer.base();
3268 int siglen = (int) buffer.size();
3269 Symbol *name;
3270 if (!intern_if_not_found) {
3271 name = SymbolTable::probe(sigstr, siglen);
3272 } else {
3273 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3274 }
3275 return name;
3276 }
3277
3278 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3279 if (mt1 == mt2)
3280 return true;
3281 if (rtype(mt1) != rtype(mt2))
3282 return false;
3283 if (ptype_count(mt1) != ptype_count(mt2))
3284 return false;
3285 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3286 if (ptype(mt1, i) != ptype(mt2, i))
3287 return false;
3288 }
3289 return true;
3290 }
3291
3292 oop java_lang_invoke_MethodType::rtype(oop mt) {
3293 assert(is_instance(mt), "must be a MethodType");
3294 return mt->obj_field(_rtype_offset);
3295 }
3296
3297 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3298 assert(is_instance(mt), "must be a MethodType");
3299 return (objArrayOop) mt->obj_field(_ptypes_offset);
3300 }
3301
3302 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3303 return ptypes(mt)->obj_at(idx);
3304 }
3305
3306 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3307 return ptypes(mt)->length();
3308 }
3309
3310 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3311 objArrayOop pts = ptypes(mt);
3312 int count = pts->length();
3313 int slots = 0;
3314 for (int i = 0; i < count; i++) {
3315 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3316 slots += type2size[bt];
3317 }
3318 return slots;
3319 }
3320
3321 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3322 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3323 return type2size[bt];
3324 }
3325
3326
3327 // Support for java_lang_invoke_CallSite
3328
3329 int java_lang_invoke_CallSite::_target_offset;
3330 int java_lang_invoke_CallSite::_context_offset;
3331
3332 void java_lang_invoke_CallSite::compute_offsets() {
3333 Klass* k = SystemDictionary::CallSite_klass();
3334 if (k != NULL) {
3335 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
3336 compute_offset(_context_offset, k, vmSymbols::context_name(),
3337 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature());
3338 }
3339 }
3340
3341 oop java_lang_invoke_CallSite::context(oop call_site) {
3342 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3343
3344 oop dep_oop = call_site->obj_field(_context_offset);
3345 return dep_oop;
3346 }
3347
3348 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3349
3350 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3351
3352 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3353 Klass* k = SystemDictionary::Context_klass();
3354 if (k != NULL) {
3355 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3356 }
3357 }
3358
3359 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3360 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3361 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset);
3362 DependencyContext dep_ctx(vmdeps_addr);
3363 return dep_ctx;
3364 }
3365
3366 // Support for java_security_AccessControlContext
3367
3368 int java_security_AccessControlContext::_context_offset = 0;
3369 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3370 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3371 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3372
3373 void java_security_AccessControlContext::compute_offsets() {
3374 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3375 fieldDescriptor fd;
3376 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass();
3377
3378 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3379 fatal("Invalid layout of java.security.AccessControlContext");
3380 }
3381 _context_offset = fd.offset();
3382
3383 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3384 fatal("Invalid layout of java.security.AccessControlContext");
3385 }
3386 _privilegedContext_offset = fd.offset();
3387
3388 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3389 fatal("Invalid layout of java.security.AccessControlContext");
3390 }
3391 _isPrivileged_offset = fd.offset();
3392
3393 // The offset may not be present for bootstrapping with older JDK.
3394 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3395 _isAuthorized_offset = fd.offset();
3396 }
3397 }
3398
3399
3400 bool java_security_AccessControlContext::is_authorized(Handle context) {
3401 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3402 assert(_isAuthorized_offset != -1, "should be set");
3403 return context->bool_field(_isAuthorized_offset) != 0;
3404 }
3405
3406 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3407 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3408 // Ensure klass is initialized
3409 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3410 // Allocate result
3411 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3412 // Fill in values
3413 result->obj_field_put(_context_offset, context());
3414 result->obj_field_put(_privilegedContext_offset, privileged_context());
3415 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3416 // whitelist AccessControlContexts created by the JVM if present
3417 if (_isAuthorized_offset != -1) {
3418 result->bool_field_put(_isAuthorized_offset, true);
3419 }
3420 return result;
3421 }
3422
3423
3424 // Support for java_lang_ClassLoader
3425
3426 bool java_lang_ClassLoader::offsets_computed = false;
3427 int java_lang_ClassLoader::_loader_data_offset = -1;
3428 int java_lang_ClassLoader::parallelCapable_offset = -1;
3429 int java_lang_ClassLoader::unnamedModule_offset = -1;
3430
3431 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3432 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3433 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3434 }
3435
3436 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3437 return *java_lang_ClassLoader::loader_data_addr(loader);
3438 }
3439
3440 void java_lang_ClassLoader::compute_offsets() {
3441 assert(!offsets_computed, "offsets should be initialized only once");
3442 offsets_computed = true;
3443
3444 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3445 Klass* k1 = SystemDictionary::ClassLoader_klass();
3446 compute_optional_offset(parallelCapable_offset,
3447 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3448
3449 compute_offset(unnamedModule_offset,
3450 k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature());
3451
3452 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3453 }
3454
3455 oop java_lang_ClassLoader::parent(oop loader) {
3456 assert(is_instance(loader), "loader must be oop");
3457 return loader->obj_field(parent_offset);
3458 }
3459
3460 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3461 assert(is_instance(loader), "loader must be oop");
3462 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3463 oop acl = loader;
3464 debug_only(jint loop_count = 0);
3465 // This loop taken verbatim from ClassLoader.java:
3466 do {
3467 acl = parent(acl);
3468 if (cl == acl) {
3469 return true;
3470 }
3471 assert(++loop_count > 0, "loop_count overflow");
3472 } while (acl != NULL);
3473 return false;
3474 }
3475
3476 bool java_lang_ClassLoader::is_instance(oop obj) {
3477 return obj != NULL && is_subclass(obj->klass());
3478 }
3479
3480
3481 // For class loader classes, parallelCapable defined
3482 // based on non-null field
3483 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3484 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3485 if (parallelCapable_offset == -1) {
3486 // Default for backward compatibility is false
3487 return false;
3488 }
3489 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3490 }
3491
3492 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3493 // Fix for 4474172; see evaluation for more details
3494 loader = non_reflection_class_loader(loader);
3495
3496 oop cl = SystemDictionary::java_system_loader();
3497 while(cl != NULL) {
3498 if (cl == loader) return true;
3499 cl = parent(cl);
3500 }
3501 return false;
3502 }
3503
3504 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3505 if (loader != NULL) {
3506 // See whether this is one of the class loaders associated with
3507 // the generated bytecodes for reflection, and if so, "magically"
3508 // delegate to its parent to prevent class loading from occurring
3509 // in places where applications using reflection didn't expect it.
3510 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3511 // This might be null in non-1.4 JDKs
3512 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3513 return parent(loader);
3514 }
3515 }
3516 return loader;
3517 }
3518
3519 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3520 assert(is_instance(loader), "loader must be oop");
3521 return loader->obj_field(unnamedModule_offset);
3522 }
3523
3524 // Support for java_lang_System
3525 int java_lang_System::in_offset_in_bytes() {
3526 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3527 }
3528
3529
3530 int java_lang_System::out_offset_in_bytes() {
3531 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3532 }
3533
3534
3535 int java_lang_System::err_offset_in_bytes() {
3536 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3537 }
3538
3539
3540 bool java_lang_System::has_security_manager() {
3541 InstanceKlass* ik = SystemDictionary::System_klass();
3542 address addr = ik->static_field_addr(static_security_offset);
3543 if (UseCompressedOops) {
3544 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3545 } else {
3546 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3547 }
3548 }
3549
3550 int java_lang_Class::_klass_offset;
3551 int java_lang_Class::_array_klass_offset;
3552 int java_lang_Class::_oop_size_offset;
3553 int java_lang_Class::_static_oop_field_count_offset;
3554 int java_lang_Class::_class_loader_offset;
3555 int java_lang_Class::_module_offset;
3556 int java_lang_Class::_protection_domain_offset;
3557 int java_lang_Class::_component_mirror_offset;
3558 int java_lang_Class::_init_lock_offset;
3559 int java_lang_Class::_signers_offset;
3560 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3561 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
3562 int java_lang_Throwable::backtrace_offset;
3563 int java_lang_Throwable::detailMessage_offset;
3564 int java_lang_Throwable::stackTrace_offset;
3565 int java_lang_Throwable::depth_offset;
3566 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3567 int java_lang_reflect_AccessibleObject::override_offset;
3568 int java_lang_reflect_Method::clazz_offset;
3569 int java_lang_reflect_Method::name_offset;
3570 int java_lang_reflect_Method::returnType_offset;
3571 int java_lang_reflect_Method::parameterTypes_offset;
3572 int java_lang_reflect_Method::exceptionTypes_offset;
3573 int java_lang_reflect_Method::slot_offset;
3574 int java_lang_reflect_Method::modifiers_offset;
3575 int java_lang_reflect_Method::signature_offset;
3576 int java_lang_reflect_Method::annotations_offset;
3577 int java_lang_reflect_Method::parameter_annotations_offset;
3578 int java_lang_reflect_Method::annotation_default_offset;
3579 int java_lang_reflect_Method::type_annotations_offset;
3580 int java_lang_reflect_Constructor::clazz_offset;
3581 int java_lang_reflect_Constructor::parameterTypes_offset;
3582 int java_lang_reflect_Constructor::exceptionTypes_offset;
3583 int java_lang_reflect_Constructor::slot_offset;
3584 int java_lang_reflect_Constructor::modifiers_offset;
3585 int java_lang_reflect_Constructor::signature_offset;
3586 int java_lang_reflect_Constructor::annotations_offset;
3587 int java_lang_reflect_Constructor::parameter_annotations_offset;
3588 int java_lang_reflect_Constructor::type_annotations_offset;
3589 int java_lang_reflect_Field::clazz_offset;
3590 int java_lang_reflect_Field::name_offset;
3591 int java_lang_reflect_Field::type_offset;
3592 int java_lang_reflect_Field::slot_offset;
3593 int java_lang_reflect_Field::modifiers_offset;
3594 int java_lang_reflect_Field::signature_offset;
3595 int java_lang_reflect_Field::annotations_offset;
3596 int java_lang_reflect_Field::type_annotations_offset;
3597 int java_lang_reflect_Parameter::name_offset;
3598 int java_lang_reflect_Parameter::modifiers_offset;
3599 int java_lang_reflect_Parameter::index_offset;
3600 int java_lang_reflect_Parameter::executable_offset;
3601 int java_lang_boxing_object::value_offset;
3602 int java_lang_boxing_object::long_value_offset;
3603 int java_lang_ref_Reference::referent_offset;
3604 int java_lang_ref_Reference::queue_offset;
3605 int java_lang_ref_Reference::next_offset;
3606 int java_lang_ref_Reference::discovered_offset;
3607 int java_lang_ref_Reference::number_of_fake_oop_fields;
3608 int java_lang_ref_SoftReference::timestamp_offset;
3609 int java_lang_ref_SoftReference::static_clock_offset;
3610 int java_lang_ClassLoader::parent_offset;
3611 int java_lang_System::static_in_offset;
3612 int java_lang_System::static_out_offset;
3613 int java_lang_System::static_err_offset;
3614 int java_lang_System::static_security_offset;
3615 int java_lang_StackTraceElement::declaringClass_offset;
3616 int java_lang_StackTraceElement::methodName_offset;
3617 int java_lang_StackTraceElement::fileName_offset;
3618 int java_lang_StackTraceElement::lineNumber_offset;
3619 int java_lang_StackTraceElement::moduleName_offset;
3620 int java_lang_StackTraceElement::moduleVersion_offset;
3621 int java_lang_StackFrameInfo::_declaringClass_offset;
3622 int java_lang_StackFrameInfo::_memberName_offset;
3623 int java_lang_StackFrameInfo::_bci_offset;
3624 int java_lang_StackFrameInfo::_version_offset;
3625 int java_lang_LiveStackFrameInfo::_monitors_offset;
3626 int java_lang_LiveStackFrameInfo::_locals_offset;
3627 int java_lang_LiveStackFrameInfo::_operands_offset;
3628 int java_lang_AssertionStatusDirectives::classes_offset;
3629 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3630 int java_lang_AssertionStatusDirectives::packages_offset;
3631 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3632 int java_lang_AssertionStatusDirectives::deflt_offset;
3633 int java_nio_Buffer::_limit_offset;
3634 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3635 int reflect_ConstantPool::_oop_offset;
3636 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3637
3638
3639 // Support for java_lang_StackTraceElement
3640
3641 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3642 element->obj_field_put(fileName_offset, value);
3643 }
3644
3645 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3646 element->obj_field_put(declaringClass_offset, value);
3647 }
3648
3649 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3650 element->obj_field_put(methodName_offset, value);
3651 }
3652
3653 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3654 element->int_field_put(lineNumber_offset, value);
3655 }
3656
3657 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
3658 element->obj_field_put(moduleName_offset, value);
3659 }
3660
3661 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
3662 element->obj_field_put(moduleVersion_offset, value);
3663 }
3664
3665 // Support for java_lang_StackFrameInfo
3666 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) {
3667 element->obj_field_put(_declaringClass_offset, value);
3668 }
3669
3670 void java_lang_StackFrameInfo::set_version(oop element, short value) {
3671 element->short_field_put(_version_offset, value);
3672 }
3673
3674 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
3675 element->int_field_put(_bci_offset, value);
3676 }
3677
3678 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
3679 element->obj_field_put(_monitors_offset, value);
3680 }
3681
3682 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
3683 element->obj_field_put(_locals_offset, value);
3684 }
3685
3686 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
3687 element->obj_field_put(_operands_offset, value);
3688 }
3689
3690 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3691
3692 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3693 o->obj_field_put(classes_offset, val);
3694 }
3695
3696 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3697 o->obj_field_put(classEnabled_offset, val);
3698 }
3699
3700 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3701 o->obj_field_put(packages_offset, val);
3702 }
3703
3704 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3705 o->obj_field_put(packageEnabled_offset, val);
3706 }
3707
3708 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3709 o->bool_field_put(deflt_offset, val);
3710 }
3711
3712
3713 // Support for intrinsification of java.nio.Buffer.checkIndex
3714 int java_nio_Buffer::limit_offset() {
3715 return _limit_offset;
3716 }
3717
3718
3719 void java_nio_Buffer::compute_offsets() {
3720 Klass* k = SystemDictionary::nio_Buffer_klass();
3721 assert(k != NULL, "must be loaded in 1.4+");
3722 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3723 }
3724
3725 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3726 if (_owner_offset != 0) return;
3727
3728 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3729 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3730 compute_offset(_owner_offset, k,
3731 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3732 }
3733
3734 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3735 assert(_owner_offset != 0, "Must be initialized");
3736 return obj->obj_field(_owner_offset);
3737 }
3738
3739 // Compute hard-coded offsets
3740 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3741 // are not available to determine the offset_of_static_fields.
3742 void JavaClasses::compute_hard_coded_offsets() {
3743 const int x = heapOopSize;
3744 const int header = instanceOopDesc::base_offset_in_bytes();
3745
3746 // Throwable Class
3747 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3748 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3749 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3750 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3751
3752 // java_lang_boxing_object
3753 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3754 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3755
3756 // java_lang_ref_Reference:
3757 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3758 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3759 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3760 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3761 // Artificial fields for java_lang_ref_Reference
3762 // The first field is for the discovered field added in 1.4
3763 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3764
3765 // java_lang_ref_SoftReference Class
3766 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3767 // Don't multiply static fields because they are always in wordSize units
3768 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3769
3770 // java_lang_ClassLoader
3771 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3772
3773 // java_lang_System
3774 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3775 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3776 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3777 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3778
3779 // java_lang_StackTraceElement
3780 java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header;
3781 java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header;
3782 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3783 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3784 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3785 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3786 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3787 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3788 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3789 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3790 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3791
3792 }
3793
3794
3795 // Compute non-hard-coded field offsets of all the classes in this file
3796 void JavaClasses::compute_offsets() {
3797 // java_lang_Class::compute_offsets was called earlier in bootstrap
3798 java_lang_ClassLoader::compute_offsets();
3799 java_lang_Throwable::compute_offsets();
3800 java_lang_Thread::compute_offsets();
3801 java_lang_ThreadGroup::compute_offsets();
3802 java_lang_invoke_MethodHandle::compute_offsets();
3803 java_lang_invoke_DirectMethodHandle::compute_offsets();
3804 java_lang_invoke_MemberName::compute_offsets();
3805 java_lang_invoke_LambdaForm::compute_offsets();
3806 java_lang_invoke_MethodType::compute_offsets();
3807 java_lang_invoke_CallSite::compute_offsets();
3808 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3809 java_security_AccessControlContext::compute_offsets();
3810 // Initialize reflection classes. The layouts of these classes
3811 // changed with the new reflection implementation in JDK 1.4, and
3812 // since the Universe doesn't know what JDK version it is until this
3813 // point we defer computation of these offsets until now.
3814 java_lang_reflect_AccessibleObject::compute_offsets();
3815 java_lang_reflect_Method::compute_offsets();
3816 java_lang_reflect_Constructor::compute_offsets();
3817 java_lang_reflect_Field::compute_offsets();
3818 java_nio_Buffer::compute_offsets();
3819 reflect_ConstantPool::compute_offsets();
3820 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3821 java_lang_reflect_Parameter::compute_offsets();
3822 java_lang_reflect_Module::compute_offsets();
3823 java_lang_StackFrameInfo::compute_offsets();
3824 java_lang_LiveStackFrameInfo::compute_offsets();
3825
3826 // generated interpreter code wants to know about the offsets we just computed:
3827 AbstractAssembler::update_delayed_values();
3828 }
3829
3830 #ifndef PRODUCT
3831
3832 // These functions exist to assert the validity of hard-coded field offsets to guard
3833 // against changes in the class files
3834
3835 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3836 EXCEPTION_MARK;
3837 fieldDescriptor fd;
3838 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3839 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3840 instanceKlassHandle h_klass (THREAD, k);
3841 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3842 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3843 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3844 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3845 return false;
3846 }
3847 if (fd.is_static()) {
3848 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3849 return false;
3850 }
3851 if (fd.offset() == hardcoded_offset ) {
3852 return true;
3853 } else {
3854 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3855 klass_name, field_name, hardcoded_offset, fd.offset());
3856 return false;
3857 }
3858 }
3859
3860
3861 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3862 EXCEPTION_MARK;
3863 fieldDescriptor fd;
3864 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3865 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3866 instanceKlassHandle h_klass (THREAD, k);
3867 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3868 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3869 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3870 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3871 return false;
3872 }
3873 if (!fd.is_static()) {
3874 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3875 return false;
3876 }
3877 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3878 return true;
3879 } else {
3880 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());
3881 return false;
3882 }
3883 }
3884
3885
3886 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3887 EXCEPTION_MARK;
3888 fieldDescriptor fd;
3889 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3890 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3891 instanceKlassHandle h_klass (THREAD, k);
3892 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3893 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3894 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3895 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3896 return false;
3897 }
3898 if (!fd.is_static() || !fd.has_initial_value()) {
3899 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3900 return false;
3901 }
3902 if (!fd.initial_value_tag().is_int()) {
3903 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3904 return false;
3905 }
3906 jint field_value = fd.int_initial_value();
3907 if (field_value == hardcoded_constant) {
3908 return true;
3909 } else {
3910 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);
3911 return false;
3912 }
3913 }
3914
3915
3916 // Check the hard-coded field offsets of all the classes in this file
3917
3918 void JavaClasses::check_offsets() {
3919 bool valid = true;
3920 HandleMark hm;
3921
3922 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3923 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3924
3925 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3926 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3927
3928 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3929 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3930
3931 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3932 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3933
3934 // java.lang.String
3935
3936 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B");
3937 if (java_lang_String::has_hash_field()) {
3938 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3939 }
3940 if (java_lang_String::has_coder_field()) {
3941 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B");
3942 }
3943
3944 // java.lang.Class
3945
3946 // Fake fields
3947 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3948 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3949
3950 // java.lang.Throwable
3951
3952 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3953 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3954 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3955 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I");
3956
3957 // Boxed primitive objects (java_lang_boxing_object)
3958
3959 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3960 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3961 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3962 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3963 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3964 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3965 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3966 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3967
3968 // java.lang.ClassLoader
3969
3970 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3971
3972 // java.lang.System
3973
3974 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3975 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3976 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3977 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3978
3979 // java.lang.StackTraceElement
3980
3981 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3982 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3983 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3984 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3985
3986 // java.lang.ref.Reference
3987
3988 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3989 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3990 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3991 // Fake field
3992 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3993
3994 // java.lang.ref.SoftReference
3995
3996 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3997 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3998
3999 // java.lang.AssertionStatusDirectives
4000 //
4001 // The CheckAssertionStatusDirectives boolean can be removed from here and
4002 // globals.hpp after the AssertionStatusDirectives class has been integrated
4003 // into merlin "for some time." Without it, the vm will fail with early
4004 // merlin builds.
4005
4006 if (CheckAssertionStatusDirectives) {
4007 const char* nm = "java/lang/AssertionStatusDirectives";
4008 const char* sig = "[Ljava/lang/String;";
4009 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
4010 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
4011 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
4012 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
4013 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
4014 }
4015
4016 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4017 }
4018
4019 #endif // PRODUCT
4020
4021 int InjectedField::compute_offset() {
4022 InstanceKlass* ik = InstanceKlass::cast(klass());
4023 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4024 if (!may_be_java && !fs.access_flags().is_internal()) {
4025 // Only look at injected fields
4026 continue;
4027 }
4028 if (fs.name() == name() && fs.signature() == signature()) {
4029 return fs.offset();
4030 }
4031 }
4032 ResourceMark rm;
4033 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)" : "");
4034 #ifndef PRODUCT
4035 ik->print();
4036 tty->print_cr("all fields:");
4037 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4038 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4039 }
4040 #endif //PRODUCT
4041 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
4042 return -1;
4043 }
4044
4045 void javaClasses_init() {
4046 JavaClasses::compute_offsets();
4047 JavaClasses::check_offsets();
4048 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4049 }