1 /*
2 * Copyright (c) 1997, 2015, 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/javaClasses.inline.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/debugInfo.hpp"
31 #include "code/dependencyContext.hpp"
32 #include "code/pcDesc.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/fieldStreams.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/instanceMirrorKlass.hpp"
40 #include "oops/klass.hpp"
41 #include "oops/method.hpp"
42 #include "oops/objArrayOop.inline.hpp"
43 #include "oops/oop.inline.hpp"
44 #include "oops/symbol.hpp"
45 #include "oops/typeArrayOop.hpp"
46 #include "prims/jvmtiRedefineClassesTrace.hpp"
47 #include "runtime/fieldDescriptor.hpp"
48 #include "runtime/handles.inline.hpp"
49 #include "runtime/interfaceSupport.hpp"
50 #include "runtime/java.hpp"
51 #include "runtime/javaCalls.hpp"
52 #include "runtime/safepoint.hpp"
53 #include "runtime/thread.inline.hpp"
54 #include "runtime/vframe.hpp"
55 #include "utilities/preserveException.hpp"
56
57 #if INCLUDE_JVMCI
58 #include "jvmci/jvmciJavaClasses.hpp"
59 #endif
60
61 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
62 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
63
64 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
65 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
66
67 InjectedField JavaClasses::_injected_fields[] = {
68 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
69 };
70
71 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
72 return _injected_fields[id].compute_offset();
73 }
74
75
76 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
77 *field_count = 0;
78
79 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
80 if (sid == vmSymbols::NO_SID) {
81 // Only well known classes can inject fields
82 return NULL;
83 }
84
85 int count = 0;
86 int start = -1;
87
88 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
89 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
90 count++; \
91 if (start == -1) start = klass##_##name##_enum; \
92 }
93 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
94 #undef LOOKUP_INJECTED_FIELD
95
96 if (start != -1) {
97 *field_count = count;
98 return _injected_fields + start;
99 }
100 return NULL;
101 }
102
103
104 static bool find_field(InstanceKlass* ik,
105 Symbol* name_symbol, Symbol* signature_symbol,
106 fieldDescriptor* fd,
107 bool is_static = false, bool allow_super = false) {
108 if (allow_super || is_static) {
109 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL;
110 } else {
111 return ik->find_local_field(name_symbol, signature_symbol, fd);
112 }
113 }
114
115 // Helpful routine for computing field offsets at run time rather than hardcoding them
116 static void
117 compute_offset(int &dest_offset,
118 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol,
119 bool is_static = false, bool allow_super = false) {
120 fieldDescriptor fd;
121 InstanceKlass* ik = InstanceKlass::cast(klass);
122 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) {
123 ResourceMark rm;
124 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
125 #ifndef PRODUCT
126 ik->print();
127 tty->print_cr("all fields:");
128 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
129 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
130 }
131 #endif //PRODUCT
132 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
133 }
134 dest_offset = fd.offset();
135 }
136
137 // Same as above but for "optional" offsets that might not be present in certain JDK versions
138 static void
139 compute_optional_offset(int& dest_offset,
140 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol,
141 bool allow_super = false) {
142 fieldDescriptor fd;
143 InstanceKlass* ik = InstanceKlass::cast(klass);
144 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
145 dest_offset = fd.offset();
146 }
147 }
148
149
150 int java_lang_String::value_offset = 0;
151 int java_lang_String::hash_offset = 0;
152 int java_lang_String::coder_offset = 0;
153
154 bool java_lang_String::initialized = false;
155
156 bool java_lang_String::is_instance(oop obj) {
157 return is_instance_inlined(obj);
158 }
159
160 void java_lang_String::compute_offsets() {
161 assert(!initialized, "offsets should be initialized only once");
162
163 Klass* k = SystemDictionary::String_klass();
164 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature());
165 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
166 compute_optional_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature());
167
168 initialized = true;
169 }
170
171 class CompactStringsFixup : public FieldClosure {
172 private:
173 bool _value;
174
175 public:
176 CompactStringsFixup(bool value) : _value(value) {}
177
178 void do_field(fieldDescriptor* fd) {
179 if (fd->name() == vmSymbols::compact_strings_name()) {
180 oop mirror = fd->field_holder()->java_mirror();
181 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
182 assert(mirror != NULL, "String must have mirror already");
183 mirror->bool_field_put(fd->offset(), _value);
184 }
185 }
186 };
187
188 void java_lang_String::set_compact_strings(bool value) {
189 CompactStringsFixup fix(value);
190 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
191 }
192
193 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
194 assert(initialized, "Must be initialized");
195 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
196
197 // Create the String object first, so there's a chance that the String
198 // and the char array it points to end up in the same cache line.
199 oop obj;
200 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
201
202 // Create the char array. The String object must be handlized here
203 // because GC can happen as a result of the allocation attempt.
204 Handle h_obj(THREAD, obj);
205 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
206 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
207
208 // Point the String at the char array
209 obj = h_obj();
210 set_value(obj, buffer);
211 // No need to zero the offset, allocation zero'ed the entire String object
212 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
213 return h_obj;
214 }
215
216 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
217 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
218 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
219 typeArrayOop buffer = value(h_obj());
220 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
221 if (is_latin1) {
222 for (int index = 0; index < length; index++) {
223 buffer->byte_at_put(index, (jbyte)unicode[index]);
224 }
225 } else {
226 for (int index = 0; index < length; index++) {
227 buffer->char_at_put(index, unicode[index]);
228 }
229 }
230
231 #ifdef ASSERT
232 {
233 ResourceMark rm;
234 char* expected = UNICODE::as_utf8(unicode, length);
235 char* actual = as_utf8_string(h_obj());
236 if (strcmp(expected, actual) != 0) {
237 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
238 ShouldNotReachHere();
239 }
240 }
241 #endif
242
243 return h_obj;
244 }
245
246 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
247 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
248 return h_obj();
249 }
250
251 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
252 if (utf8_str == NULL) {
253 return Handle();
254 }
255 bool has_multibyte, is_latin1;
256 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
257 if (!CompactStrings) {
258 has_multibyte = true;
259 is_latin1 = false;
260 }
261
262 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
263 if (length > 0) {
264 if (!has_multibyte) {
265 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
266 } else if (is_latin1) {
267 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
268 } else {
269 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
270 }
271 }
272
273 #ifdef ASSERT
274 // This check is too strict because the input string is not necessarily valid UTF8.
275 // For example, it may be created with arbitrary content via jni_NewStringUTF.
276 /*
277 {
278 ResourceMark rm;
279 const char* expected = utf8_str;
280 char* actual = as_utf8_string(h_obj());
281 if (strcmp(expected, actual) != 0) {
282 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
283 ShouldNotReachHere();
284 }
285 }
286 */
287 #endif
288
289 return h_obj;
290 }
291
292 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
293 Handle h_obj = create_from_str(utf8_str, CHECK_0);
294 return h_obj();
295 }
296
297 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
298 const char* utf8_str = (char*)symbol->bytes();
299 int utf8_len = symbol->utf8_length();
300
301 bool has_multibyte, is_latin1;
302 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
303 if (!CompactStrings) {
304 has_multibyte = true;
305 is_latin1 = false;
306 }
307
308 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
309 if (length > 0) {
310 if (!has_multibyte) {
311 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
312 } else if (is_latin1) {
313 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
314 } else {
315 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
316 }
317 }
318
319 #ifdef ASSERT
320 {
321 ResourceMark rm;
322 const char* expected = symbol->as_utf8();
323 char* actual = as_utf8_string(h_obj());
324 if (strncmp(expected, actual, utf8_len) != 0) {
325 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
326 ShouldNotReachHere();
327 }
328 }
329 #endif
330
331 return h_obj;
332 }
333
334 // Converts a C string to a Java String based on current encoding
335 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
336 assert(str != NULL, "bad arguments");
337
338 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
339 static to_java_string_fn_t _to_java_string_fn = NULL;
340
341 if (_to_java_string_fn == NULL) {
342 void *lib_handle = os::native_java_library();
343 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
344 if (_to_java_string_fn == NULL) {
345 fatal("NewStringPlatform missing");
346 }
347 }
348
349 jstring js = NULL;
350 { JavaThread* thread = (JavaThread*)THREAD;
351 assert(thread->is_Java_thread(), "must be java thread");
352 HandleMark hm(thread);
353 ThreadToNativeFromVM ttn(thread);
354 js = (_to_java_string_fn)(thread->jni_environment(), str);
355 }
356 return Handle(THREAD, JNIHandles::resolve(js));
357 }
358
359 // Converts a Java String to a native C string that can be used for
360 // native OS calls.
361 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
362 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
363 static to_platform_string_fn_t _to_platform_string_fn = NULL;
364
365 if (_to_platform_string_fn == NULL) {
366 void *lib_handle = os::native_java_library();
367 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
368 if (_to_platform_string_fn == NULL) {
369 fatal("GetStringPlatformChars missing");
370 }
371 }
372
373 char *native_platform_string;
374 { JavaThread* thread = (JavaThread*)THREAD;
375 assert(thread->is_Java_thread(), "must be java thread");
376 JNIEnv *env = thread->jni_environment();
377 jstring js = (jstring) JNIHandles::make_local(env, java_string());
378 bool is_copy;
379 HandleMark hm(thread);
380 ThreadToNativeFromVM ttn(thread);
381 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
382 assert(is_copy == JNI_TRUE, "is_copy value changed");
383 JNIHandles::destroy_local(js);
384 }
385 return native_platform_string;
386 }
387
388 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
389 oop obj = java_string();
390 // Typical usage is to convert all '/' to '.' in string.
391 typeArrayOop value = java_lang_String::value(obj);
392 int length = java_lang_String::length(obj);
393 bool is_latin1 = java_lang_String::is_latin1(obj);
394
395 // First check if any from_char exist
396 int index; // Declared outside, used later
397 for (index = 0; index < length; index++) {
398 jchar c = !is_latin1 ? value->char_at(index) :
399 ((jchar) value->byte_at(index)) & 0xff;
400 if (c == from_char) {
401 break;
402 }
403 }
404 if (index == length) {
405 // No from_char, so do not copy.
406 return java_string;
407 }
408
409 // Check if result string will be latin1
410 bool to_is_latin1 = false;
411
412 // Replacement char must be latin1
413 if (CompactStrings && UNICODE::is_latin1(to_char)) {
414 if (is_latin1) {
415 // Source string is latin1 as well
416 to_is_latin1 = true;
417 } else if (!UNICODE::is_latin1(from_char)) {
418 // We are replacing an UTF16 char. Scan string to
419 // check if result can be latin1 encoded.
420 to_is_latin1 = true;
421 for (index = 0; index < length; index++) {
422 jchar c = value->char_at(index);
423 if (c != from_char && !UNICODE::is_latin1(c)) {
424 to_is_latin1 = false;
425 break;
426 }
427 }
428 }
429 }
430
431 // Create new UNICODE (or byte) buffer. Must handlize value because GC
432 // may happen during String and char array creation.
433 typeArrayHandle h_value(THREAD, value);
434 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
435 typeArrayOop from_buffer = h_value();
436 typeArrayOop to_buffer = java_lang_String::value(string());
437
438 // Copy contents
439 for (index = 0; index < length; index++) {
440 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
441 ((jchar) from_buffer->byte_at(index)) & 0xff;
442 if (c == from_char) {
443 c = to_char;
444 }
445 if (!to_is_latin1) {
446 to_buffer->char_at_put(index, c);
447 } else {
448 to_buffer->byte_at_put(index, (jbyte) c);
449 }
450 }
451 return string;
452 }
453
454 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
455 typeArrayOop value = java_lang_String::value(java_string);
456 length = java_lang_String::length(java_string);
457 bool is_latin1 = java_lang_String::is_latin1(java_string);
458
459 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
460 if (result != NULL) {
461 if (!is_latin1) {
462 for (int index = 0; index < length; index++) {
463 result[index] = value->char_at(index);
464 }
465 } else {
466 for (int index = 0; index < length; index++) {
467 result[index] = ((jchar) value->byte_at(index)) & 0xff;
468 }
469 }
470 } else {
471 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
472 }
473 return result;
474 }
475
476 unsigned int java_lang_String::hash_code(oop java_string) {
477 int length = java_lang_String::length(java_string);
478 // Zero length string will hash to zero with String.hashCode() function.
479 if (length == 0) return 0;
480
481 typeArrayOop value = java_lang_String::value(java_string);
482 bool is_latin1 = java_lang_String::is_latin1(java_string);
483
484 if (is_latin1) {
485 return java_lang_String::hash_code(value->byte_at_addr(0), length);
486 } else {
487 return java_lang_String::hash_code(value->char_at_addr(0), length);
488 }
489 }
490
491 char* java_lang_String::as_quoted_ascii(oop java_string) {
492 typeArrayOop value = java_lang_String::value(java_string);
493 int length = java_lang_String::length(java_string);
494 bool is_latin1 = java_lang_String::is_latin1(java_string);
495
496 if (length == 0) return NULL;
497
498 char* result;
499 int result_length;
500 if (!is_latin1) {
501 jchar* base = value->char_at_addr(0);
502 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
503 result = NEW_RESOURCE_ARRAY(char, result_length);
504 UNICODE::as_quoted_ascii(base, length, result, result_length);
505 } else {
506 jbyte* base = value->byte_at_addr(0);
507 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
508 result = NEW_RESOURCE_ARRAY(char, result_length);
509 UNICODE::as_quoted_ascii(base, length, result, result_length);
510 }
511 assert(result_length >= length + 1, "must not be shorter");
512 assert(result_length == (int)strlen(result) + 1, "must match");
513 return result;
514 }
515
516 unsigned int java_lang_String::hash_string(oop java_string) {
517 int length = java_lang_String::length(java_string);
518 // Zero length string doesn't necessarily hash to zero.
519 if (length == 0) {
520 return StringTable::hash_string((jchar*) NULL, 0);
521 }
522
523 typeArrayOop value = java_lang_String::value(java_string);
524 bool is_latin1 = java_lang_String::is_latin1(java_string);
525 if (is_latin1) {
526 return StringTable::hash_string(value->byte_at_addr(0), length);
527 } else {
528 return StringTable::hash_string(value->char_at_addr(0), length);
529 }
530 }
531
532 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
533 oop obj = java_string();
534 typeArrayOop value = java_lang_String::value(obj);
535 int length = java_lang_String::length(obj);
536 bool is_latin1 = java_lang_String::is_latin1(obj);
537 if (!is_latin1) {
538 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
539 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
540 return sym;
541 } else {
542 ResourceMark rm;
543 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
544 const char* base = UNICODE::as_utf8(position, length);
545 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
546 return sym;
547 }
548 }
549
550 Symbol* java_lang_String::as_symbol_or_null(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 (!is_latin1) {
555 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
556 return SymbolTable::probe_unicode(base, length);
557 } else {
558 ResourceMark rm;
559 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
560 const char* base = UNICODE::as_utf8(position, length);
561 return SymbolTable::probe(base, length);
562 }
563 }
564
565 int java_lang_String::utf8_length(oop java_string) {
566 typeArrayOop value = java_lang_String::value(java_string);
567 int length = java_lang_String::length(java_string);
568 bool is_latin1 = java_lang_String::is_latin1(java_string);
569 if (length == 0) {
570 return 0;
571 }
572 if (!is_latin1) {
573 return UNICODE::utf8_length(value->char_at_addr(0), length);
574 } else {
575 return UNICODE::utf8_length(value->byte_at_addr(0), length);
576 }
577 }
578
579 char* java_lang_String::as_utf8_string(oop java_string) {
580 typeArrayOop value = java_lang_String::value(java_string);
581 int length = java_lang_String::length(java_string);
582 bool is_latin1 = java_lang_String::is_latin1(java_string);
583 if (!is_latin1) {
584 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
585 return UNICODE::as_utf8(position, length);
586 } else {
587 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
588 return UNICODE::as_utf8(position, length);
589 }
590 }
591
592 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
593 typeArrayOop value = java_lang_String::value(java_string);
594 int length = java_lang_String::length(java_string);
595 bool is_latin1 = java_lang_String::is_latin1(java_string);
596 if (!is_latin1) {
597 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
598 return UNICODE::as_utf8(position, length, buf, buflen);
599 } else {
600 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
601 return UNICODE::as_utf8(position, length, buf, buflen);
602 }
603 }
604
605 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
606 typeArrayOop value = java_lang_String::value(java_string);
607 int length = java_lang_String::length(java_string);
608 assert(start + len <= length, "just checking");
609 bool is_latin1 = java_lang_String::is_latin1(java_string);
610 if (!is_latin1) {
611 jchar* position = value->char_at_addr(start);
612 return UNICODE::as_utf8(position, len);
613 } else {
614 jbyte* position = value->byte_at_addr(start);
615 return UNICODE::as_utf8(position, len);
616 }
617 }
618
619 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
620 typeArrayOop value = java_lang_String::value(java_string);
621 int length = java_lang_String::length(java_string);
622 assert(start + len <= length, "just checking");
623 bool is_latin1 = java_lang_String::is_latin1(java_string);
624 if (!is_latin1) {
625 jchar* position = value->char_at_addr(start);
626 return UNICODE::as_utf8(position, len, buf, buflen);
627 } else {
628 jbyte* position = value->byte_at_addr(start);
629 return UNICODE::as_utf8(position, len, buf, buflen);
630 }
631 }
632
633 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
634 assert(java_string->klass() == SystemDictionary::String_klass(),
635 "must be java_string");
636 typeArrayOop value = java_lang_String::value(java_string);
637 int length = java_lang_String::length(java_string);
638 if (length != len) {
639 return false;
640 }
641 bool is_latin1 = java_lang_String::is_latin1(java_string);
642 if (!is_latin1) {
643 for (int i = 0; i < len; i++) {
644 if (value->char_at(i) != chars[i]) {
645 return false;
646 }
647 }
648 } else {
649 for (int i = 0; i < len; i++) {
650 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
651 return false;
652 }
653 }
654 }
655 return true;
656 }
657
658 bool java_lang_String::equals(oop str1, oop str2) {
659 assert(str1->klass() == SystemDictionary::String_klass(),
660 "must be java String");
661 assert(str2->klass() == SystemDictionary::String_klass(),
662 "must be java String");
663 typeArrayOop value1 = java_lang_String::value(str1);
664 int length1 = java_lang_String::length(str1);
665 bool is_latin1 = java_lang_String::is_latin1(str1);
666 typeArrayOop value2 = java_lang_String::value(str2);
667 int length2 = java_lang_String::length(str2);
668 bool is_latin2 = java_lang_String::is_latin1(str2);
669
670 if ((length1 != length2) || (is_latin1 != is_latin2)) {
671 // Strings of different size or with different
672 // coders are never equal.
673 return false;
674 }
675 int blength1 = value1->length();
676 for (int i = 0; i < value1->length(); i++) {
677 if (value1->byte_at(i) != value2->byte_at(i)) {
678 return false;
679 }
680 }
681 return true;
682 }
683
684 void java_lang_String::print(oop java_string, outputStream* st) {
685 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
686 typeArrayOop value = java_lang_String::value(java_string);
687
688 if (value == NULL) {
689 // This can happen if, e.g., printing a String
690 // object before its initializer has been called
691 st->print("NULL");
692 return;
693 }
694
695 int length = java_lang_String::length(java_string);
696 bool is_latin1 = java_lang_String::is_latin1(java_string);
697
698 st->print("\"");
699 for (int index = 0; index < length; index++) {
700 st->print("%c", (!is_latin1) ? value->char_at(index) :
701 ((jchar) value->byte_at(index)) & 0xff );
702 }
703 st->print("\"");
704 }
705
706
707 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
708 assert(mirror.not_null() && fd->is_static(), "just checking");
709 if (fd->has_initial_value()) {
710 BasicType t = fd->field_type();
711 switch (t) {
712 case T_BYTE:
713 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
714 break;
715 case T_BOOLEAN:
716 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
717 break;
718 case T_CHAR:
719 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
720 break;
721 case T_SHORT:
722 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
723 break;
724 case T_INT:
725 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
726 break;
727 case T_FLOAT:
728 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
729 break;
730 case T_DOUBLE:
731 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
732 break;
733 case T_LONG:
734 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
735 break;
736 case T_OBJECT:
737 {
738 #ifdef ASSERT
739 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
740 assert(fd->signature() == sym, "just checking");
741 #endif
742 oop string = fd->string_initial_value(CHECK);
743 mirror()->obj_field_put(fd->offset(), string);
744 }
745 break;
746 default:
747 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
748 "Illegal ConstantValue attribute in class file");
749 }
750 }
751 }
752
753
754 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
755 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
756
757 // If the offset was read from the shared archive, it was fixed up already
758 if (!k->is_shared()) {
759 if (k->is_instance_klass()) {
760 // During bootstrap, java.lang.Class wasn't loaded so static field
761 // offsets were computed without the size added it. Go back and
762 // update all the static field offsets to included the size.
763 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
764 if (fs.access_flags().is_static()) {
765 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
766 fs.set_offset(real_offset);
767 }
768 }
769 }
770 }
771 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
772 }
773
774 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
775 Handle mirror,
776 Handle protection_domain,
777 TRAPS) {
778 // Allocate a simple java object for a lock.
779 // This needs to be a java object because during class initialization
780 // it can be held across a java call.
781 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
782 set_init_lock(mirror(), r);
783
784 // Set protection domain also
785 set_protection_domain(mirror(), protection_domain());
786
787 // Initialize static fields
788 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
789 }
790
791 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
792 Handle protection_domain, TRAPS) {
793 assert(k->java_mirror() == NULL, "should only assign mirror once");
794 // Use this moment of initialization to cache modifier_flags also,
795 // to support Class.getModifiers(). Instance classes recalculate
796 // the cached flags after the class file is parsed, but before the
797 // class is put into the system dictionary.
798 int computed_modifiers = k->compute_modifier_flags(CHECK);
799 k->set_modifier_flags(computed_modifiers);
800 // Class_klass has to be loaded because it is used to allocate
801 // the mirror.
802 if (SystemDictionary::Class_klass_loaded()) {
803 // Allocate mirror (java.lang.Class instance)
804 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
805
806 // Setup indirection from mirror->klass
807 if (!k.is_null()) {
808 java_lang_Class::set_klass(mirror(), k());
809 }
810
811 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
812 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
813
814 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
815
816 // It might also have a component mirror. This mirror must already exist.
817 if (k->is_array_klass()) {
818 Handle comp_mirror;
819 if (k->is_typeArray_klass()) {
820 BasicType type = TypeArrayKlass::cast(k())->element_type();
821 comp_mirror = Universe::java_mirror(type);
822 } else {
823 assert(k->is_objArray_klass(), "Must be");
824 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
825 assert(element_klass != NULL, "Must have an element klass");
826 comp_mirror = element_klass->java_mirror();
827 }
828 assert(comp_mirror.not_null(), "must have a mirror");
829
830 // Two-way link between the array klass and its component mirror:
831 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
832 set_component_mirror(mirror(), comp_mirror());
833 set_array_klass(comp_mirror(), k());
834 } else {
835 assert(k->is_instance_klass(), "Must be");
836
837 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
838 if (HAS_PENDING_EXCEPTION) {
839 // If any of the fields throws an exception like OOM remove the klass field
840 // from the mirror so GC doesn't follow it after the klass has been deallocated.
841 // This mirror looks like a primitive type, which logically it is because it
842 // it represents no class.
843 java_lang_Class::set_klass(mirror(), NULL);
844 return;
845 }
846 }
847
848 // set the classLoader field in the java_lang_Class instance
849 assert(class_loader() == k->class_loader(), "should be same");
850 set_class_loader(mirror(), class_loader());
851
852 // Setup indirection from klass->mirror last
853 // after any exceptions can happen during allocations.
854 if (!k.is_null()) {
855 k->set_java_mirror(mirror());
856 }
857 } else {
858 if (fixup_mirror_list() == NULL) {
859 GrowableArray<Klass*>* list =
860 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
861 set_fixup_mirror_list(list);
862 }
863 fixup_mirror_list()->push(k());
864 }
865 }
866
867
868 int java_lang_Class::oop_size(oop java_class) {
869 assert(_oop_size_offset != 0, "must be set");
870 return java_class->int_field(_oop_size_offset);
871 }
872 void java_lang_Class::set_oop_size(oop java_class, int size) {
873 assert(_oop_size_offset != 0, "must be set");
874 java_class->int_field_put(_oop_size_offset, size);
875 }
876 int java_lang_Class::static_oop_field_count(oop java_class) {
877 assert(_static_oop_field_count_offset != 0, "must be set");
878 return java_class->int_field(_static_oop_field_count_offset);
879 }
880 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
881 assert(_static_oop_field_count_offset != 0, "must be set");
882 java_class->int_field_put(_static_oop_field_count_offset, size);
883 }
884
885 oop java_lang_Class::protection_domain(oop java_class) {
886 assert(_protection_domain_offset != 0, "must be set");
887 return java_class->obj_field(_protection_domain_offset);
888 }
889 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
890 assert(_protection_domain_offset != 0, "must be set");
891 java_class->obj_field_put(_protection_domain_offset, pd);
892 }
893
894 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
895 assert(_component_mirror_offset != 0, "must be set");
896 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
897 }
898 oop java_lang_Class::component_mirror(oop java_class) {
899 assert(_component_mirror_offset != 0, "must be set");
900 return java_class->obj_field(_component_mirror_offset);
901 }
902
903 oop java_lang_Class::init_lock(oop java_class) {
904 assert(_init_lock_offset != 0, "must be set");
905 return java_class->obj_field(_init_lock_offset);
906 }
907 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
908 assert(_init_lock_offset != 0, "must be set");
909 java_class->obj_field_put(_init_lock_offset, init_lock);
910 }
911
912 objArrayOop java_lang_Class::signers(oop java_class) {
913 assert(_signers_offset != 0, "must be set");
914 return (objArrayOop)java_class->obj_field(_signers_offset);
915 }
916 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
917 assert(_signers_offset != 0, "must be set");
918 java_class->obj_field_put(_signers_offset, (oop)signers);
919 }
920
921
922 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
923 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
924 if (_class_loader_offset != 0) {
925 java_class->obj_field_put(_class_loader_offset, loader);
926 }
927 }
928
929 oop java_lang_Class::class_loader(oop java_class) {
930 assert(_class_loader_offset != 0, "must be set");
931 return java_class->obj_field(_class_loader_offset);
932 }
933
934 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
935 // This should be improved by adding a field at the Java level or by
936 // introducing a new VM klass (see comment in ClassFileParser)
937 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
938 if (type != T_VOID) {
939 Klass* aklass = Universe::typeArrayKlassObj(type);
940 assert(aklass != NULL, "correct bootstrap");
941 set_array_klass(java_class, aklass);
942 }
943 #ifdef ASSERT
944 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
945 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
946 #endif
947 return java_class;
948 }
949
950
951 Klass* java_lang_Class::as_Klass(oop java_class) {
952 //%note memory_2
953 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
954 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
955 assert(k == NULL || k->is_klass(), "type check");
956 return k;
957 }
958
959
960 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
961 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
962 java_class->metadata_field_put(_klass_offset, klass);
963 }
964
965
966 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
967 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
968 Symbol* name = NULL;
969 bool is_instance = false;
970 if (is_primitive(java_class)) {
971 name = vmSymbols::type_signature(primitive_type(java_class));
972 } else {
973 Klass* k = as_Klass(java_class);
974 is_instance = k->is_instance_klass();
975 name = k->name();
976 }
977 if (name == NULL) {
978 st->print("<null>");
979 return;
980 }
981 if (is_instance) st->print("L");
982 st->write((char*) name->base(), (int) name->utf8_length());
983 if (is_instance) st->print(";");
984 }
985
986 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
987 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
988 Symbol* name;
989 if (is_primitive(java_class)) {
990 name = vmSymbols::type_signature(primitive_type(java_class));
991 // Because this can create a new symbol, the caller has to decrement
992 // the refcount, so make adjustment here and below for symbols returned
993 // that are not created or incremented due to a successful lookup.
994 name->increment_refcount();
995 } else {
996 Klass* k = as_Klass(java_class);
997 if (!k->is_instance_klass()) {
998 name = k->name();
999 name->increment_refcount();
1000 } else {
1001 ResourceMark rm;
1002 const char* sigstr = k->signature_name();
1003 int siglen = (int) strlen(sigstr);
1004 if (!intern_if_not_found) {
1005 name = SymbolTable::probe(sigstr, siglen);
1006 } else {
1007 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1008 }
1009 }
1010 }
1011 return name;
1012 }
1013
1014 // Returns the Java name for this Java mirror (Resource allocated)
1015 // See Klass::external_name().
1016 // For primitive type Java mirrors, its type name is returned.
1017 const char* java_lang_Class::as_external_name(oop java_class) {
1018 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1019 const char* name = NULL;
1020 if (is_primitive(java_class)) {
1021 name = type2name(primitive_type(java_class));
1022 } else {
1023 name = as_Klass(java_class)->external_name();
1024 }
1025 if (name == NULL) {
1026 name = "<null>";
1027 }
1028 return name;
1029 }
1030
1031 Klass* java_lang_Class::array_klass(oop java_class) {
1032 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1033 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1034 return k;
1035 }
1036
1037
1038 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
1039 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1040 java_class->metadata_field_put(_array_klass_offset, klass);
1041 }
1042
1043
1044 bool java_lang_Class::is_primitive(oop java_class) {
1045 // should assert:
1046 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1047 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1048
1049 #ifdef ASSERT
1050 if (is_primitive) {
1051 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1052 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1053 "Should be either the T_VOID primitive or a java primitive");
1054 }
1055 #endif
1056
1057 return is_primitive;
1058 }
1059
1060
1061 BasicType java_lang_Class::primitive_type(oop java_class) {
1062 assert(java_lang_Class::is_primitive(java_class), "just checking");
1063 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1064 BasicType type = T_VOID;
1065 if (ak != NULL) {
1066 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1067 type = ArrayKlass::cast(ak)->element_type();
1068 } else {
1069 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1070 }
1071 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1072 return type;
1073 }
1074
1075 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1076 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1077 if (is_primitive(java_class)) {
1078 if (reference_klass != NULL)
1079 (*reference_klass) = NULL;
1080 return primitive_type(java_class);
1081 } else {
1082 if (reference_klass != NULL)
1083 (*reference_klass) = as_Klass(java_class);
1084 return T_OBJECT;
1085 }
1086 }
1087
1088
1089 oop java_lang_Class::primitive_mirror(BasicType t) {
1090 oop mirror = Universe::java_mirror(t);
1091 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1092 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1093 return mirror;
1094 }
1095
1096 bool java_lang_Class::offsets_computed = false;
1097 int java_lang_Class::classRedefinedCount_offset = -1;
1098
1099 void java_lang_Class::compute_offsets() {
1100 assert(!offsets_computed, "offsets should be initialized only once");
1101 offsets_computed = true;
1102
1103 Klass* k = SystemDictionary::Class_klass();
1104 // The classRedefinedCount field is only present starting in 1.5,
1105 // so don't go fatal.
1106 compute_optional_offset(classRedefinedCount_offset,
1107 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
1108
1109 // Needs to be optional because the old build runs Queens during bootstrapping
1110 // and jdk8-9 doesn't have coordinated pushes yet.
1111 compute_optional_offset(_class_loader_offset,
1112 k, vmSymbols::classLoader_name(),
1113 vmSymbols::classloader_signature());
1114
1115 compute_offset(_component_mirror_offset,
1116 k, vmSymbols::componentType_name(),
1117 vmSymbols::class_signature());
1118
1119 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1120 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1121 // GC treats them the same.
1122 _init_lock_offset = _component_mirror_offset;
1123
1124 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1125 }
1126
1127 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1128 if (classRedefinedCount_offset == -1) {
1129 // If we don't have an offset for it then just return -1 as a marker.
1130 return -1;
1131 }
1132
1133 return the_class_mirror->int_field(classRedefinedCount_offset);
1134 }
1135
1136 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1137 if (classRedefinedCount_offset == -1) {
1138 // If we don't have an offset for it then nothing to set.
1139 return;
1140 }
1141
1142 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1143 }
1144
1145
1146 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1147 // platform thread structure, and a eetop offset which was used for thread
1148 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1149 // merged, so in the HotSpot VM we just use the eetop field for the thread
1150 // instead of the privateInfo_offset.
1151 //
1152 // Note: The stackSize field is only present starting in 1.4.
1153
1154 int java_lang_Thread::_name_offset = 0;
1155 int java_lang_Thread::_group_offset = 0;
1156 int java_lang_Thread::_contextClassLoader_offset = 0;
1157 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1158 int java_lang_Thread::_priority_offset = 0;
1159 int java_lang_Thread::_eetop_offset = 0;
1160 int java_lang_Thread::_daemon_offset = 0;
1161 int java_lang_Thread::_stillborn_offset = 0;
1162 int java_lang_Thread::_stackSize_offset = 0;
1163 int java_lang_Thread::_tid_offset = 0;
1164 int java_lang_Thread::_thread_status_offset = 0;
1165 int java_lang_Thread::_park_blocker_offset = 0;
1166 int java_lang_Thread::_park_event_offset = 0 ;
1167
1168
1169 void java_lang_Thread::compute_offsets() {
1170 assert(_group_offset == 0, "offsets should be initialized only once");
1171
1172 Klass* k = SystemDictionary::Thread_klass();
1173 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1174 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
1175 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
1176 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
1177 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
1178 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1179 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
1180 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
1181 // The stackSize field is only present starting in 1.4, so don't go fatal.
1182 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
1183 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
1184 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
1185 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
1186 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
1187 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
1188 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
1189 vmSymbols::long_signature());
1190 }
1191
1192
1193 JavaThread* java_lang_Thread::thread(oop java_thread) {
1194 return (JavaThread*)java_thread->address_field(_eetop_offset);
1195 }
1196
1197
1198 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1199 java_thread->address_field_put(_eetop_offset, (address)thread);
1200 }
1201
1202
1203 oop java_lang_Thread::name(oop java_thread) {
1204 return java_thread->obj_field(_name_offset);
1205 }
1206
1207
1208 void java_lang_Thread::set_name(oop java_thread, oop name) {
1209 java_thread->obj_field_put(_name_offset, name);
1210 }
1211
1212
1213 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1214 return (ThreadPriority)java_thread->int_field(_priority_offset);
1215 }
1216
1217
1218 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1219 java_thread->int_field_put(_priority_offset, priority);
1220 }
1221
1222
1223 oop java_lang_Thread::threadGroup(oop java_thread) {
1224 return java_thread->obj_field(_group_offset);
1225 }
1226
1227
1228 bool java_lang_Thread::is_stillborn(oop java_thread) {
1229 return java_thread->bool_field(_stillborn_offset) != 0;
1230 }
1231
1232
1233 // We never have reason to turn the stillborn bit off
1234 void java_lang_Thread::set_stillborn(oop java_thread) {
1235 java_thread->bool_field_put(_stillborn_offset, true);
1236 }
1237
1238
1239 bool java_lang_Thread::is_alive(oop java_thread) {
1240 JavaThread* thr = java_lang_Thread::thread(java_thread);
1241 return (thr != NULL);
1242 }
1243
1244
1245 bool java_lang_Thread::is_daemon(oop java_thread) {
1246 return java_thread->bool_field(_daemon_offset) != 0;
1247 }
1248
1249
1250 void java_lang_Thread::set_daemon(oop java_thread) {
1251 java_thread->bool_field_put(_daemon_offset, true);
1252 }
1253
1254 oop java_lang_Thread::context_class_loader(oop java_thread) {
1255 return java_thread->obj_field(_contextClassLoader_offset);
1256 }
1257
1258 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1259 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1260 }
1261
1262
1263 jlong java_lang_Thread::stackSize(oop java_thread) {
1264 if (_stackSize_offset > 0) {
1265 return java_thread->long_field(_stackSize_offset);
1266 } else {
1267 return 0;
1268 }
1269 }
1270
1271 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1272 void java_lang_Thread::set_thread_status(oop java_thread,
1273 java_lang_Thread::ThreadStatus status) {
1274 // The threadStatus is only present starting in 1.5
1275 if (_thread_status_offset > 0) {
1276 java_thread->int_field_put(_thread_status_offset, status);
1277 }
1278 }
1279
1280 // Read thread status value from threadStatus field in java.lang.Thread java class.
1281 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1282 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1283 JavaThread::current()->thread_state() == _thread_in_vm,
1284 "Java Thread is not running in vm");
1285 // The threadStatus is only present starting in 1.5
1286 if (_thread_status_offset > 0) {
1287 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1288 } else {
1289 // All we can easily figure out is if it is alive, but that is
1290 // enough info for a valid unknown status.
1291 // These aren't restricted to valid set ThreadStatus values, so
1292 // use JVMTI values and cast.
1293 JavaThread* thr = java_lang_Thread::thread(java_thread);
1294 if (thr == NULL) {
1295 // the thread hasn't run yet or is in the process of exiting
1296 return NEW;
1297 }
1298 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1299 }
1300 }
1301
1302
1303 jlong java_lang_Thread::thread_id(oop java_thread) {
1304 // The thread ID field is only present starting in 1.5
1305 if (_tid_offset > 0) {
1306 return java_thread->long_field(_tid_offset);
1307 } else {
1308 return 0;
1309 }
1310 }
1311
1312 oop java_lang_Thread::park_blocker(oop java_thread) {
1313 assert(JDK_Version::current().supports_thread_park_blocker() &&
1314 _park_blocker_offset != 0, "Must support parkBlocker field");
1315
1316 if (_park_blocker_offset > 0) {
1317 return java_thread->obj_field(_park_blocker_offset);
1318 }
1319
1320 return NULL;
1321 }
1322
1323 jlong java_lang_Thread::park_event(oop java_thread) {
1324 if (_park_event_offset > 0) {
1325 return java_thread->long_field(_park_event_offset);
1326 }
1327 return 0;
1328 }
1329
1330 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1331 if (_park_event_offset > 0) {
1332 java_thread->long_field_put(_park_event_offset, ptr);
1333 return true;
1334 }
1335 return false;
1336 }
1337
1338
1339 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1340 assert(_thread_status_offset != 0, "Must have thread status");
1341 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1342 switch (status) {
1343 case NEW : return "NEW";
1344 case RUNNABLE : return "RUNNABLE";
1345 case SLEEPING : return "TIMED_WAITING (sleeping)";
1346 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1347 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1348 case PARKED : return "WAITING (parking)";
1349 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1350 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1351 case TERMINATED : return "TERMINATED";
1352 default : return "UNKNOWN";
1353 };
1354 }
1355 int java_lang_ThreadGroup::_parent_offset = 0;
1356 int java_lang_ThreadGroup::_name_offset = 0;
1357 int java_lang_ThreadGroup::_threads_offset = 0;
1358 int java_lang_ThreadGroup::_groups_offset = 0;
1359 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1360 int java_lang_ThreadGroup::_destroyed_offset = 0;
1361 int java_lang_ThreadGroup::_daemon_offset = 0;
1362 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1363 int java_lang_ThreadGroup::_nthreads_offset = 0;
1364 int java_lang_ThreadGroup::_ngroups_offset = 0;
1365
1366 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1367 assert(java_thread_group->is_oop(), "thread group must be oop");
1368 return java_thread_group->obj_field(_parent_offset);
1369 }
1370
1371 // ("name as oop" accessor is not necessary)
1372
1373 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1374 oop name = java_thread_group->obj_field(_name_offset);
1375 // ThreadGroup.name can be null
1376 if (name != NULL) {
1377 return java_lang_String::as_utf8_string(name);
1378 }
1379 return NULL;
1380 }
1381
1382 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1383 assert(java_thread_group->is_oop(), "thread group must be oop");
1384 return java_thread_group->int_field(_nthreads_offset);
1385 }
1386
1387 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1388 oop threads = java_thread_group->obj_field(_threads_offset);
1389 assert(threads != NULL, "threadgroups should have threads");
1390 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1391 return objArrayOop(threads);
1392 }
1393
1394 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1395 assert(java_thread_group->is_oop(), "thread group must be oop");
1396 return java_thread_group->int_field(_ngroups_offset);
1397 }
1398
1399 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1400 oop groups = java_thread_group->obj_field(_groups_offset);
1401 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1402 return objArrayOop(groups);
1403 }
1404
1405 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1406 assert(java_thread_group->is_oop(), "thread group must be oop");
1407 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1408 }
1409
1410 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1411 assert(java_thread_group->is_oop(), "thread group must be oop");
1412 return java_thread_group->bool_field(_destroyed_offset) != 0;
1413 }
1414
1415 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1416 assert(java_thread_group->is_oop(), "thread group must be oop");
1417 return java_thread_group->bool_field(_daemon_offset) != 0;
1418 }
1419
1420 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1421 assert(java_thread_group->is_oop(), "thread group must be oop");
1422 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1423 }
1424
1425 void java_lang_ThreadGroup::compute_offsets() {
1426 assert(_parent_offset == 0, "offsets should be initialized only once");
1427
1428 Klass* k = SystemDictionary::ThreadGroup_klass();
1429
1430 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1431 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1432 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1433 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1434 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1435 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1436 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1437 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1438 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1439 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1440 }
1441
1442 oop java_lang_Throwable::unassigned_stacktrace() {
1443 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1444 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1445 if (UseCompressedOops) {
1446 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1447 } else {
1448 return oopDesc::load_decode_heap_oop((oop*)addr);
1449 }
1450 }
1451
1452 oop java_lang_Throwable::backtrace(oop throwable) {
1453 return throwable->obj_field_acquire(backtrace_offset);
1454 }
1455
1456
1457 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1458 throwable->release_obj_field_put(backtrace_offset, value);
1459 }
1460
1461
1462 oop java_lang_Throwable::message(oop throwable) {
1463 return throwable->obj_field(detailMessage_offset);
1464 }
1465
1466
1467 oop java_lang_Throwable::message(Handle throwable) {
1468 return throwable->obj_field(detailMessage_offset);
1469 }
1470
1471
1472 // Return Symbol for detailed_message or NULL
1473 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1474 PRESERVE_EXCEPTION_MARK; // Keep original exception
1475 oop detailed_message = java_lang_Throwable::message(throwable);
1476 if (detailed_message != NULL) {
1477 return java_lang_String::as_symbol(detailed_message, THREAD);
1478 }
1479 return NULL;
1480 }
1481
1482 void java_lang_Throwable::set_message(oop throwable, oop value) {
1483 throwable->obj_field_put(detailMessage_offset, value);
1484 }
1485
1486
1487 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1488 throwable->obj_field_put(stackTrace_offset, st_element_array);
1489 }
1490
1491 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1492 set_stacktrace(throwable, NULL);
1493 }
1494
1495
1496 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1497 ResourceMark rm;
1498 Klass* k = throwable->klass();
1499 assert(k != NULL, "just checking");
1500 st->print("%s", k->external_name());
1501 oop msg = message(throwable);
1502 if (msg != NULL) {
1503 st->print(": %s", java_lang_String::as_utf8_string(msg));
1504 }
1505 }
1506
1507
1508 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1509 ResourceMark rm;
1510 Klass* k = throwable->klass();
1511 assert(k != NULL, "just checking");
1512 st->print("%s", k->external_name());
1513 oop msg = message(throwable);
1514 if (msg != NULL) {
1515 st->print(": %s", java_lang_String::as_utf8_string(msg));
1516 }
1517 }
1518
1519 // After this many redefines, the stack trace is unreliable.
1520 const int MAX_VERSION = USHRT_MAX;
1521
1522 static inline bool version_matches(Method* method, int version) {
1523 assert(version < MAX_VERSION, "version is too big");
1524 return method != NULL && (method->constants()->version() == version);
1525 }
1526
1527 // This class provides a simple wrapper over the internal structure of
1528 // exception backtrace to insulate users of the backtrace from needing
1529 // to know what it looks like.
1530 class BacktraceBuilder: public StackObj {
1531 private:
1532 Handle _backtrace;
1533 objArrayOop _head;
1534 typeArrayOop _methods;
1535 typeArrayOop _bcis;
1536 objArrayOop _mirrors;
1537 typeArrayOop _cprefs; // needed to insulate method name against redefinition
1538 int _index;
1539 No_Safepoint_Verifier _nsv;
1540
1541 public:
1542
1543 enum {
1544 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1545 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1546 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1547 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset,
1548 trace_next_offset = java_lang_Throwable::trace_next_offset,
1549 trace_size = java_lang_Throwable::trace_size,
1550 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1551 };
1552
1553 // get info out of chunks
1554 static typeArrayOop get_methods(objArrayHandle chunk) {
1555 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1556 assert(methods != NULL, "method array should be initialized in backtrace");
1557 return methods;
1558 }
1559 static typeArrayOop get_bcis(objArrayHandle chunk) {
1560 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1561 assert(bcis != NULL, "bci array should be initialized in backtrace");
1562 return bcis;
1563 }
1564 static objArrayOop get_mirrors(objArrayHandle chunk) {
1565 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1566 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1567 return mirrors;
1568 }
1569 static typeArrayOop get_cprefs(objArrayHandle chunk) {
1570 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1571 assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1572 return cprefs;
1573 }
1574
1575 // constructor for new backtrace
1576 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1577 expand(CHECK);
1578 _backtrace = _head;
1579 _index = 0;
1580 }
1581
1582 BacktraceBuilder(objArrayHandle backtrace) {
1583 _methods = get_methods(backtrace);
1584 _bcis = get_bcis(backtrace);
1585 _mirrors = get_mirrors(backtrace);
1586 _cprefs = get_cprefs(backtrace);
1587 assert(_methods->length() == _bcis->length() &&
1588 _methods->length() == _mirrors->length(),
1589 "method and source information arrays should match");
1590
1591 // head is the preallocated backtrace
1592 _backtrace = _head = backtrace();
1593 _index = 0;
1594 }
1595
1596 void expand(TRAPS) {
1597 objArrayHandle old_head(THREAD, _head);
1598 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1599
1600 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1601 objArrayHandle new_head(THREAD, head);
1602
1603 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1604 typeArrayHandle new_methods(THREAD, methods);
1605
1606 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1607 typeArrayHandle new_bcis(THREAD, bcis);
1608
1609 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1610 objArrayHandle new_mirrors(THREAD, mirrors);
1611
1612 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1613 typeArrayHandle new_cprefs(THREAD, cprefs);
1614
1615 if (!old_head.is_null()) {
1616 old_head->obj_at_put(trace_next_offset, new_head());
1617 }
1618 new_head->obj_at_put(trace_methods_offset, new_methods());
1619 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1620 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1621 new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1622
1623 _head = new_head();
1624 _methods = new_methods();
1625 _bcis = new_bcis();
1626 _mirrors = new_mirrors();
1627 _cprefs = new_cprefs();
1628 _index = 0;
1629 }
1630
1631 oop backtrace() {
1632 return _backtrace();
1633 }
1634
1635 inline void push(Method* method, int bci, TRAPS) {
1636 // Smear the -1 bci to 0 since the array only holds unsigned
1637 // shorts. The later line number lookup would just smear the -1
1638 // to a 0 even if it could be recorded.
1639 if (bci == SynchronizationEntryBCI) bci = 0;
1640
1641 if (_index >= trace_chunk_size) {
1642 methodHandle mhandle(THREAD, method);
1643 expand(CHECK);
1644 method = mhandle();
1645 }
1646
1647 _methods->short_at_put(_index, method->orig_method_idnum());
1648 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
1649 _cprefs->short_at_put(_index, method->name_index());
1650
1651 // We need to save the mirrors in the backtrace to keep the class
1652 // from being unloaded while we still have this stack trace.
1653 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1654 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1655 _index++;
1656 }
1657
1658 };
1659
1660 // Print stack trace element to resource allocated buffer
1661 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1662 int method_id, int version, int bci, int cpref) {
1663
1664 // Get strings and string lengths
1665 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1666 const char* klass_name = holder->external_name();
1667 int buf_len = (int)strlen(klass_name);
1668
1669 Method* method = holder->method_with_orig_idnum(method_id, version);
1670
1671 // The method can be NULL if the requested class version is gone
1672 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1673 char* method_name = sym->as_C_string();
1674 buf_len += (int)strlen(method_name);
1675
1676 char* source_file_name = NULL;
1677 Symbol* source = Backtrace::get_source_file_name(holder, version);
1678 if (source != NULL) {
1679 source_file_name = source->as_C_string();
1680 buf_len += (int)strlen(source_file_name);
1681 }
1682
1683 // Allocate temporary buffer with extra space for formatting and line number
1684 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1685
1686 // Print stack trace line in buffer
1687 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1688
1689 if (!version_matches(method, version)) {
1690 strcat(buf, "(Redefined)");
1691 } else {
1692 int line_number = Backtrace::get_line_number(method, bci);
1693 if (line_number == -2) {
1694 strcat(buf, "(Native Method)");
1695 } else {
1696 if (source_file_name != NULL && (line_number != -1)) {
1697 // Sourcename and linenumber
1698 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1699 } else if (source_file_name != NULL) {
1700 // Just sourcename
1701 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1702 } else {
1703 // Neither sourcename nor linenumber
1704 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1705 }
1706 nmethod* nm = method->code();
1707 if (WizardMode && nm != NULL) {
1708 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1709 }
1710 }
1711 }
1712
1713 return buf;
1714 }
1715
1716 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1717 int method_id, int version, int bci, int cpref) {
1718 ResourceMark rm;
1719 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1720 st->print_cr("%s", buf);
1721 }
1722
1723 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
1724 Handle mirror = method->method_holder()->java_mirror();
1725 int method_id = method->orig_method_idnum();
1726 int version = method->constants()->version();
1727 int cpref = method->name_index();
1728 print_stack_element(st, mirror, method_id, version, bci, cpref);
1729 }
1730
1731 const char* java_lang_Throwable::no_stack_trace_message() {
1732 return "\t<<no stack trace available>>";
1733 }
1734
1735
1736 // Currently used only for exceptions occurring during startup
1737 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1738 Thread *THREAD = Thread::current();
1739 Handle h_throwable(THREAD, throwable);
1740 while (h_throwable.not_null()) {
1741 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1742 if (result.is_null()) {
1743 st->print_raw_cr(no_stack_trace_message());
1744 return;
1745 }
1746
1747 while (result.not_null()) {
1748
1749 // Get method id, bci, version and mirror from chunk
1750 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1751 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1752 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1753 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1754
1755 int length = methods()->length();
1756 for (int index = 0; index < length; index++) {
1757 Handle mirror(THREAD, mirrors->obj_at(index));
1758 // NULL mirror means end of stack trace
1759 if (mirror.is_null()) goto handle_cause;
1760 int method = methods->short_at(index);
1761 int version = Backtrace::version_at(bcis->int_at(index));
1762 int bci = Backtrace::bci_at(bcis->int_at(index));
1763 int cpref = cprefs->short_at(index);
1764 print_stack_element(st, mirror, method, version, bci, cpref);
1765 }
1766 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1767 }
1768 handle_cause:
1769 {
1770 EXCEPTION_MARK;
1771 JavaValue cause(T_OBJECT);
1772 JavaCalls::call_virtual(&cause,
1773 h_throwable,
1774 KlassHandle(THREAD, h_throwable->klass()),
1775 vmSymbols::getCause_name(),
1776 vmSymbols::void_throwable_signature(),
1777 THREAD);
1778 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1779 if (HAS_PENDING_EXCEPTION) {
1780 CLEAR_PENDING_EXCEPTION;
1781 h_throwable = Handle();
1782 } else {
1783 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1784 if (h_throwable.not_null()) {
1785 st->print("Caused by: ");
1786 print(h_throwable, st);
1787 st->cr();
1788 }
1789 }
1790 }
1791 }
1792 }
1793
1794 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
1795 if (!StackTraceInThrowable) return;
1796 ResourceMark rm(THREAD);
1797
1798 // Start out by clearing the backtrace for this object, in case the VM
1799 // runs out of memory while allocating the stack trace
1800 set_backtrace(throwable(), NULL);
1801 // Clear lazily constructed Java level stacktrace if refilling occurs
1802 // This is unnecessary in 1.7+ but harmless
1803 clear_stacktrace(throwable());
1804
1805 int max_depth = MaxJavaStackTraceDepth;
1806 JavaThread* thread = (JavaThread*)THREAD;
1807 BacktraceBuilder bt(CHECK);
1808
1809 // If there is no Java frame just return the method that was being called
1810 // with bci 0
1811 if (!thread->has_last_Java_frame()) {
1812 if (max_depth >= 1 && method() != NULL) {
1813 bt.push(method(), 0, CHECK);
1814 set_backtrace(throwable(), bt.backtrace());
1815 }
1816 return;
1817 }
1818
1819 // Instead of using vframe directly, this version of fill_in_stack_trace
1820 // basically handles everything by hand. This significantly improved the
1821 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1822 // See bug 6333838 for more details.
1823 // The "ASSERT" here is to verify this method generates the exactly same stack
1824 // trace as utilizing vframe.
1825 #ifdef ASSERT
1826 vframeStream st(thread);
1827 methodHandle st_method(THREAD, st.method());
1828 #endif
1829 int total_count = 0;
1830 RegisterMap map(thread, false);
1831 int decode_offset = 0;
1832 nmethod* nm = NULL;
1833 bool skip_fillInStackTrace_check = false;
1834 bool skip_throwableInit_check = false;
1835 bool skip_hidden = !ShowHiddenFrames;
1836
1837 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1838 Method* method = NULL;
1839 int bci = 0;
1840
1841 // Compiled java method case.
1842 if (decode_offset != 0) {
1843 DebugInfoReadStream stream(nm, decode_offset);
1844 decode_offset = stream.read_int();
1845 method = (Method*)nm->metadata_at(stream.read_int());
1846 bci = stream.read_bci();
1847 } else {
1848 if (fr.is_first_frame()) break;
1849 address pc = fr.pc();
1850 if (fr.is_interpreted_frame()) {
1851 address bcp = fr.interpreter_frame_bcp();
1852 method = fr.interpreter_frame_method();
1853 bci = method->bci_from(bcp);
1854 fr = fr.sender(&map);
1855 } else {
1856 CodeBlob* cb = fr.cb();
1857 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1858 // but non nmethod
1859 fr = fr.sender(&map);
1860 if (cb == NULL || !cb->is_nmethod()) {
1861 continue;
1862 }
1863 nm = (nmethod*)cb;
1864 if (nm->method()->is_native()) {
1865 method = nm->method();
1866 bci = 0;
1867 } else {
1868 PcDesc* pd = nm->pc_desc_at(pc);
1869 decode_offset = pd->scope_decode_offset();
1870 // if decode_offset is not equal to 0, it will execute the
1871 // "compiled java method case" at the beginning of the loop.
1872 continue;
1873 }
1874 }
1875 }
1876 #ifdef ASSERT
1877 assert(st_method() == method && st.bci() == bci,
1878 "Wrong stack trace");
1879 st.next();
1880 // vframeStream::method isn't GC-safe so store off a copy
1881 // of the Method* in case we GC.
1882 if (!st.at_end()) {
1883 st_method = st.method();
1884 }
1885 #endif
1886
1887 // the format of the stacktrace will be:
1888 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1889 // - 0 or more <init> methods for the exception class (skipped)
1890 // - rest of the stack
1891
1892 if (!skip_fillInStackTrace_check) {
1893 if (method->name() == vmSymbols::fillInStackTrace_name() &&
1894 throwable->is_a(method->method_holder())) {
1895 continue;
1896 }
1897 else {
1898 skip_fillInStackTrace_check = true; // gone past them all
1899 }
1900 }
1901 if (!skip_throwableInit_check) {
1902 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1903
1904 // skip <init> methods of the exception class and superclasses
1905 // This is simlar to classic VM.
1906 if (method->name() == vmSymbols::object_initializer_name() &&
1907 throwable->is_a(method->method_holder())) {
1908 continue;
1909 } else {
1910 // there are none or we've seen them all - either way stop checking
1911 skip_throwableInit_check = true;
1912 }
1913 }
1914 if (method->is_hidden()) {
1915 if (skip_hidden) continue;
1916 }
1917 bt.push(method, bci, CHECK);
1918 total_count++;
1919 }
1920
1921 // Put completed stack trace into throwable object
1922 set_backtrace(throwable(), bt.backtrace());
1923 }
1924
1925 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
1926 // No-op if stack trace is disabled
1927 if (!StackTraceInThrowable) {
1928 return;
1929 }
1930
1931 // Disable stack traces for some preallocated out of memory errors
1932 if (!Universe::should_fill_in_stack_trace(throwable)) {
1933 return;
1934 }
1935
1936 PRESERVE_EXCEPTION_MARK;
1937
1938 JavaThread* thread = JavaThread::active();
1939 fill_in_stack_trace(throwable, method, thread);
1940 // ignore exceptions thrown during stack trace filling
1941 CLEAR_PENDING_EXCEPTION;
1942 }
1943
1944 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1945 // Allocate stack trace - backtrace is created but not filled in
1946
1947 // No-op if stack trace is disabled
1948 if (!StackTraceInThrowable) return;
1949 BacktraceBuilder bt(CHECK); // creates a backtrace
1950 set_backtrace(throwable(), bt.backtrace());
1951 }
1952
1953
1954 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1955 // Fill in stack trace into preallocated backtrace (no GC)
1956
1957 // No-op if stack trace is disabled
1958 if (!StackTraceInThrowable) return;
1959
1960 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1961
1962 JavaThread* THREAD = JavaThread::current();
1963
1964 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1965 assert(backtrace.not_null(), "backtrace should have been preallocated");
1966
1967 ResourceMark rm(THREAD);
1968 vframeStream st(THREAD);
1969
1970 BacktraceBuilder bt(backtrace);
1971
1972 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1973 // methods as preallocated errors aren't created by "java" code.
1974
1975 // fill in as much stack trace as possible
1976 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1977 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1978 int chunk_count = 0;
1979
1980 for (;!st.at_end(); st.next()) {
1981 bt.push(st.method(), st.bci(), CHECK);
1982 chunk_count++;
1983
1984 // Bail-out for deep stacks
1985 if (chunk_count >= max_chunks) break;
1986 }
1987
1988 // We support the Throwable immutability protocol defined for Java 7.
1989 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1990 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1991 }
1992
1993
1994 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1995 if (throwable == NULL) {
1996 THROW_0(vmSymbols::java_lang_NullPointerException());
1997 }
1998 objArrayOop chunk = objArrayOop(backtrace(throwable));
1999 int depth = 0;
2000 if (chunk != NULL) {
2001 // Iterate over chunks and count full ones
2002 while (true) {
2003 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
2004 if (next == NULL) break;
2005 depth += trace_chunk_size;
2006 chunk = next;
2007 }
2008 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
2009 // Count element in remaining partial chunk. NULL value for mirror
2010 // marks the end of the stack trace elements that are saved.
2011 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
2012 assert(mirrors != NULL, "sanity check");
2013 for (int i = 0; i < mirrors->length(); i++) {
2014 if (mirrors->obj_at(i) == NULL) break;
2015 depth++;
2016 }
2017 }
2018 return depth;
2019 }
2020
2021
2022 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
2023 if (throwable == NULL) {
2024 THROW_0(vmSymbols::java_lang_NullPointerException());
2025 }
2026 if (index < 0) {
2027 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
2028 }
2029 // Compute how many chunks to skip and index into actual chunk
2030 objArrayOop chunk = objArrayOop(backtrace(throwable));
2031 int skip_chunks = index / trace_chunk_size;
2032 int chunk_index = index % trace_chunk_size;
2033 while (chunk != NULL && skip_chunks > 0) {
2034 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
2035 skip_chunks--;
2036 }
2037 if (chunk == NULL) {
2038 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
2039 }
2040 // Get method id, bci, version, mirror and cpref from chunk
2041 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
2042 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
2043 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
2044 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
2045
2046 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
2047
2048 int method = methods->short_at(chunk_index);
2049 int version = Backtrace::version_at(bcis->int_at(chunk_index));
2050 int bci = Backtrace::bci_at(bcis->int_at(chunk_index));
2051 int cpref = cprefs->short_at(chunk_index);
2052 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
2053
2054 // Chunk can be partial full
2055 if (mirror.is_null()) {
2056 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
2057 }
2058 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
2059 return element;
2060 }
2061
2062 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
2063 int version, int bci, int cpref, TRAPS) {
2064 // Allocate java.lang.StackTraceElement instance
2065 Klass* k = SystemDictionary::StackTraceElement_klass();
2066 assert(k != NULL, "must be loaded in 1.4+");
2067 instanceKlassHandle ik (THREAD, k);
2068 if (ik->should_be_initialized()) {
2069 ik->initialize(CHECK_0);
2070 }
2071
2072 Handle element = ik->allocate_instance_handle(CHECK_0);
2073
2074 // Fill in class name
2075 ResourceMark rm(THREAD);
2076 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2077 const char* str = holder->external_name();
2078 oop classname = StringTable::intern((char*) str, CHECK_0);
2079 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2080
2081 Method* method = holder->method_with_orig_idnum(method_id, version);
2082
2083 // The method can be NULL if the requested class version is gone
2084 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
2085
2086 // Fill in method name
2087 oop methodname = StringTable::intern(sym, CHECK_0);
2088 java_lang_StackTraceElement::set_methodName(element(), methodname);
2089
2090 if (!version_matches(method, version)) {
2091 // The method was redefined, accurate line number information isn't available
2092 java_lang_StackTraceElement::set_fileName(element(), NULL);
2093 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2094 } else {
2095 // Fill in source file name and line number.
2096 Symbol* source = Backtrace::get_source_file_name(holder, version);
2097 if (ShowHiddenFrames && source == NULL)
2098 source = vmSymbols::unknown_class_name();
2099 oop filename = StringTable::intern(source, CHECK_0);
2100 java_lang_StackTraceElement::set_fileName(element(), filename);
2101
2102 int line_number = Backtrace::get_line_number(method, bci);
2103 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2104 }
2105 return element();
2106 }
2107
2108 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2109 Handle mirror (THREAD, method->method_holder()->java_mirror());
2110 int method_id = method->orig_method_idnum();
2111 int cpref = method->name_index();
2112 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
2113 }
2114
2115 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2116 if (MemberNameInStackFrame) {
2117 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2118 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2119 // we should expand MemberName::name when Throwable uses StackTrace
2120 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2121 return method;
2122 } else {
2123 short mid = stackFrame->short_field(_mid_offset);
2124 short version = stackFrame->short_field(_version_offset);
2125 return holder->method_with_orig_idnum(mid, version);
2126 }
2127 }
2128
2129 Symbol* java_lang_StackFrameInfo::get_file_name(Handle stackFrame, InstanceKlass* holder) {
2130 if (MemberNameInStackFrame) {
2131 return holder->source_file_name();
2132 } else {
2133 short version = stackFrame->short_field(_version_offset);
2134 return Backtrace::get_source_file_name(holder, version);
2135 }
2136 }
2137
2138 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci) {
2139 // set Method* or mid/cpref
2140 if (MemberNameInStackFrame) {
2141 oop mname = stackFrame->obj_field(_memberName_offset);
2142 InstanceKlass* ik = method->method_holder();
2143 CallInfo info(method(), ik);
2144 MethodHandles::init_method_MemberName(mname, info);
2145 } else {
2146 int mid = method->orig_method_idnum();
2147 int cpref = method->name_index();
2148 assert((jushort)mid == mid, "mid should be short");
2149 assert((jushort)cpref == cpref, "cpref should be short");
2150 java_lang_StackFrameInfo::set_mid(stackFrame(), (short)mid);
2151 java_lang_StackFrameInfo::set_cpref(stackFrame(), (short)cpref);
2152 }
2153 // set bci
2154 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2155 // method may be redefined; store the version
2156 int version = method->constants()->version();
2157 assert((jushort)version == version, "version should be short");
2158 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2159 }
2160
2161 void java_lang_StackFrameInfo::fill_methodInfo(Handle stackFrame, TRAPS) {
2162 ResourceMark rm(THREAD);
2163 oop k = stackFrame->obj_field(_declaringClass_offset);
2164 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k));
2165 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2166 int bci = stackFrame->int_field(_bci_offset);
2167
2168 // The method can be NULL if the requested class version is gone
2169 Symbol* sym = (method != NULL) ? method->name() : NULL;
2170 if (MemberNameInStackFrame) {
2171 assert(sym != NULL, "MemberName must have method name");
2172 } else {
2173 // The method can be NULL if the requested class version is gone
2174 if (sym == NULL) {
2175 short cpref = stackFrame->short_field(_cpref_offset);
2176 sym = holder->constants()->symbol_at(cpref);
2177 }
2178 }
2179
2180 // set method name
2181 oop methodname = StringTable::intern(sym, CHECK);
2182 java_lang_StackFrameInfo::set_methodName(stackFrame(), methodname);
2183
2184 // set file name and line number
2185 Symbol* source = get_file_name(stackFrame, holder);
2186 if (source != NULL) {
2187 oop filename = StringTable::intern(source, CHECK);
2188 java_lang_StackFrameInfo::set_fileName(stackFrame(), filename);
2189 }
2190
2191 // if the method has been redefined, the bci is no longer applicable
2192 short version = stackFrame->short_field(_version_offset);
2193 if (version_matches(method, version)) {
2194 int line_number = Backtrace::get_line_number(method, bci);
2195 java_lang_StackFrameInfo::set_lineNumber(stackFrame(), line_number);
2196 }
2197 }
2198
2199 void java_lang_StackFrameInfo::compute_offsets() {
2200 Klass* k = SystemDictionary::StackFrameInfo_klass();
2201 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature());
2202 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature());
2203 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::int_signature());
2204 compute_offset(_methodName_offset, k, vmSymbols::methodName_name(), vmSymbols::string_signature());
2205 compute_offset(_fileName_offset, k, vmSymbols::fileName_name(), vmSymbols::string_signature());
2206 compute_offset(_lineNumber_offset, k, vmSymbols::lineNumber_name(), vmSymbols::int_signature());
2207 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2208 }
2209
2210 void java_lang_LiveStackFrameInfo::compute_offsets() {
2211 Klass* k = SystemDictionary::LiveStackFrameInfo_klass();
2212 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature());
2213 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature());
2214 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature());
2215 }
2216
2217 void java_lang_reflect_AccessibleObject::compute_offsets() {
2218 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
2219 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
2220 }
2221
2222 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2223 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2224 return (jboolean) reflect->bool_field(override_offset);
2225 }
2226
2227 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2228 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2229 reflect->bool_field_put(override_offset, (int) value);
2230 }
2231
2232 void java_lang_reflect_Method::compute_offsets() {
2233 Klass* k = SystemDictionary::reflect_Method_klass();
2234 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2235 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2236 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
2237 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2238 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2239 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2240 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2241 // The generic signature and annotations fields are only present in 1.5
2242 signature_offset = -1;
2243 annotations_offset = -1;
2244 parameter_annotations_offset = -1;
2245 annotation_default_offset = -1;
2246 type_annotations_offset = -1;
2247 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2248 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2249 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2250 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
2251 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2252 }
2253
2254 Handle java_lang_reflect_Method::create(TRAPS) {
2255 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2256 Klass* klass = SystemDictionary::reflect_Method_klass();
2257 // This class is eagerly initialized during VM initialization, since we keep a refence
2258 // to one of the methods
2259 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2260 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2261 }
2262
2263 oop java_lang_reflect_Method::clazz(oop reflect) {
2264 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2265 return reflect->obj_field(clazz_offset);
2266 }
2267
2268 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2269 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2270 reflect->obj_field_put(clazz_offset, value);
2271 }
2272
2273 int java_lang_reflect_Method::slot(oop reflect) {
2274 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2275 return reflect->int_field(slot_offset);
2276 }
2277
2278 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2279 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2280 reflect->int_field_put(slot_offset, value);
2281 }
2282
2283 oop java_lang_reflect_Method::name(oop method) {
2284 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2285 return method->obj_field(name_offset);
2286 }
2287
2288 void java_lang_reflect_Method::set_name(oop method, oop value) {
2289 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2290 method->obj_field_put(name_offset, value);
2291 }
2292
2293 oop java_lang_reflect_Method::return_type(oop method) {
2294 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2295 return method->obj_field(returnType_offset);
2296 }
2297
2298 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2299 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2300 method->obj_field_put(returnType_offset, value);
2301 }
2302
2303 oop java_lang_reflect_Method::parameter_types(oop method) {
2304 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2305 return method->obj_field(parameterTypes_offset);
2306 }
2307
2308 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2309 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2310 method->obj_field_put(parameterTypes_offset, value);
2311 }
2312
2313 oop java_lang_reflect_Method::exception_types(oop method) {
2314 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2315 return method->obj_field(exceptionTypes_offset);
2316 }
2317
2318 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2319 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2320 method->obj_field_put(exceptionTypes_offset, value);
2321 }
2322
2323 int java_lang_reflect_Method::modifiers(oop method) {
2324 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2325 return method->int_field(modifiers_offset);
2326 }
2327
2328 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2329 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2330 method->int_field_put(modifiers_offset, value);
2331 }
2332
2333 bool java_lang_reflect_Method::has_signature_field() {
2334 return (signature_offset >= 0);
2335 }
2336
2337 oop java_lang_reflect_Method::signature(oop method) {
2338 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2339 assert(has_signature_field(), "signature field must be present");
2340 return method->obj_field(signature_offset);
2341 }
2342
2343 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2344 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2345 assert(has_signature_field(), "signature field must be present");
2346 method->obj_field_put(signature_offset, value);
2347 }
2348
2349 bool java_lang_reflect_Method::has_annotations_field() {
2350 return (annotations_offset >= 0);
2351 }
2352
2353 oop java_lang_reflect_Method::annotations(oop method) {
2354 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2355 assert(has_annotations_field(), "annotations field must be present");
2356 return method->obj_field(annotations_offset);
2357 }
2358
2359 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2360 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2361 assert(has_annotations_field(), "annotations field must be present");
2362 method->obj_field_put(annotations_offset, value);
2363 }
2364
2365 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2366 return (parameter_annotations_offset >= 0);
2367 }
2368
2369 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2370 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2371 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2372 return method->obj_field(parameter_annotations_offset);
2373 }
2374
2375 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2376 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2377 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2378 method->obj_field_put(parameter_annotations_offset, value);
2379 }
2380
2381 bool java_lang_reflect_Method::has_annotation_default_field() {
2382 return (annotation_default_offset >= 0);
2383 }
2384
2385 oop java_lang_reflect_Method::annotation_default(oop method) {
2386 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2387 assert(has_annotation_default_field(), "annotation default field must be present");
2388 return method->obj_field(annotation_default_offset);
2389 }
2390
2391 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2392 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2393 assert(has_annotation_default_field(), "annotation default field must be present");
2394 method->obj_field_put(annotation_default_offset, value);
2395 }
2396
2397 bool java_lang_reflect_Method::has_type_annotations_field() {
2398 return (type_annotations_offset >= 0);
2399 }
2400
2401 oop java_lang_reflect_Method::type_annotations(oop method) {
2402 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2403 assert(has_type_annotations_field(), "type_annotations field must be present");
2404 return method->obj_field(type_annotations_offset);
2405 }
2406
2407 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2408 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2409 assert(has_type_annotations_field(), "type_annotations field must be present");
2410 method->obj_field_put(type_annotations_offset, value);
2411 }
2412
2413 void java_lang_reflect_Constructor::compute_offsets() {
2414 Klass* k = SystemDictionary::reflect_Constructor_klass();
2415 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2416 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2417 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2418 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2419 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2420 // The generic signature and annotations fields are only present in 1.5
2421 signature_offset = -1;
2422 annotations_offset = -1;
2423 parameter_annotations_offset = -1;
2424 type_annotations_offset = -1;
2425 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2426 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2427 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2428 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2429 }
2430
2431 Handle java_lang_reflect_Constructor::create(TRAPS) {
2432 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2433 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2434 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2435 instanceKlassHandle klass (THREAD, k);
2436 // Ensure it is initialized
2437 klass->initialize(CHECK_NH);
2438 return klass->allocate_instance_handle(THREAD);
2439 }
2440
2441 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2442 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2443 return reflect->obj_field(clazz_offset);
2444 }
2445
2446 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2447 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2448 reflect->obj_field_put(clazz_offset, value);
2449 }
2450
2451 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2452 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2453 return constructor->obj_field(parameterTypes_offset);
2454 }
2455
2456 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2457 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2458 constructor->obj_field_put(parameterTypes_offset, value);
2459 }
2460
2461 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2462 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2463 return constructor->obj_field(exceptionTypes_offset);
2464 }
2465
2466 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2467 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2468 constructor->obj_field_put(exceptionTypes_offset, value);
2469 }
2470
2471 int java_lang_reflect_Constructor::slot(oop reflect) {
2472 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2473 return reflect->int_field(slot_offset);
2474 }
2475
2476 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2477 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2478 reflect->int_field_put(slot_offset, value);
2479 }
2480
2481 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2482 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2483 return constructor->int_field(modifiers_offset);
2484 }
2485
2486 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2487 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2488 constructor->int_field_put(modifiers_offset, value);
2489 }
2490
2491 bool java_lang_reflect_Constructor::has_signature_field() {
2492 return (signature_offset >= 0);
2493 }
2494
2495 oop java_lang_reflect_Constructor::signature(oop constructor) {
2496 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2497 assert(has_signature_field(), "signature field must be present");
2498 return constructor->obj_field(signature_offset);
2499 }
2500
2501 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2502 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2503 assert(has_signature_field(), "signature field must be present");
2504 constructor->obj_field_put(signature_offset, value);
2505 }
2506
2507 bool java_lang_reflect_Constructor::has_annotations_field() {
2508 return (annotations_offset >= 0);
2509 }
2510
2511 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2512 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2513 assert(has_annotations_field(), "annotations field must be present");
2514 return constructor->obj_field(annotations_offset);
2515 }
2516
2517 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2518 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2519 assert(has_annotations_field(), "annotations field must be present");
2520 constructor->obj_field_put(annotations_offset, value);
2521 }
2522
2523 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2524 return (parameter_annotations_offset >= 0);
2525 }
2526
2527 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2528 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2529 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2530 return method->obj_field(parameter_annotations_offset);
2531 }
2532
2533 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2534 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2535 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2536 method->obj_field_put(parameter_annotations_offset, value);
2537 }
2538
2539 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2540 return (type_annotations_offset >= 0);
2541 }
2542
2543 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2544 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2545 assert(has_type_annotations_field(), "type_annotations field must be present");
2546 return constructor->obj_field(type_annotations_offset);
2547 }
2548
2549 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2550 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2551 assert(has_type_annotations_field(), "type_annotations field must be present");
2552 constructor->obj_field_put(type_annotations_offset, value);
2553 }
2554
2555 void java_lang_reflect_Field::compute_offsets() {
2556 Klass* k = SystemDictionary::reflect_Field_klass();
2557 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2558 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2559 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2560 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2561 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2562 // The generic signature and annotations fields are only present in 1.5
2563 signature_offset = -1;
2564 annotations_offset = -1;
2565 type_annotations_offset = -1;
2566 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2567 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2568 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2569 }
2570
2571 Handle java_lang_reflect_Field::create(TRAPS) {
2572 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2573 Symbol* name = vmSymbols::java_lang_reflect_Field();
2574 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2575 instanceKlassHandle klass (THREAD, k);
2576 // Ensure it is initialized
2577 klass->initialize(CHECK_NH);
2578 return klass->allocate_instance_handle(THREAD);
2579 }
2580
2581 oop java_lang_reflect_Field::clazz(oop reflect) {
2582 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2583 return reflect->obj_field(clazz_offset);
2584 }
2585
2586 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2587 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2588 reflect->obj_field_put(clazz_offset, value);
2589 }
2590
2591 oop java_lang_reflect_Field::name(oop field) {
2592 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2593 return field->obj_field(name_offset);
2594 }
2595
2596 void java_lang_reflect_Field::set_name(oop field, oop value) {
2597 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2598 field->obj_field_put(name_offset, value);
2599 }
2600
2601 oop java_lang_reflect_Field::type(oop field) {
2602 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2603 return field->obj_field(type_offset);
2604 }
2605
2606 void java_lang_reflect_Field::set_type(oop field, oop value) {
2607 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2608 field->obj_field_put(type_offset, value);
2609 }
2610
2611 int java_lang_reflect_Field::slot(oop reflect) {
2612 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2613 return reflect->int_field(slot_offset);
2614 }
2615
2616 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2617 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2618 reflect->int_field_put(slot_offset, value);
2619 }
2620
2621 int java_lang_reflect_Field::modifiers(oop field) {
2622 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2623 return field->int_field(modifiers_offset);
2624 }
2625
2626 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2627 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2628 field->int_field_put(modifiers_offset, value);
2629 }
2630
2631 bool java_lang_reflect_Field::has_signature_field() {
2632 return (signature_offset >= 0);
2633 }
2634
2635 oop java_lang_reflect_Field::signature(oop field) {
2636 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2637 assert(has_signature_field(), "signature field must be present");
2638 return field->obj_field(signature_offset);
2639 }
2640
2641 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2642 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2643 assert(has_signature_field(), "signature field must be present");
2644 field->obj_field_put(signature_offset, value);
2645 }
2646
2647 bool java_lang_reflect_Field::has_annotations_field() {
2648 return (annotations_offset >= 0);
2649 }
2650
2651 oop java_lang_reflect_Field::annotations(oop field) {
2652 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2653 assert(has_annotations_field(), "annotations field must be present");
2654 return field->obj_field(annotations_offset);
2655 }
2656
2657 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2658 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2659 assert(has_annotations_field(), "annotations field must be present");
2660 field->obj_field_put(annotations_offset, value);
2661 }
2662
2663 bool java_lang_reflect_Field::has_type_annotations_field() {
2664 return (type_annotations_offset >= 0);
2665 }
2666
2667 oop java_lang_reflect_Field::type_annotations(oop field) {
2668 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2669 assert(has_type_annotations_field(), "type_annotations field must be present");
2670 return field->obj_field(type_annotations_offset);
2671 }
2672
2673 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2674 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2675 assert(has_type_annotations_field(), "type_annotations field must be present");
2676 field->obj_field_put(type_annotations_offset, value);
2677 }
2678
2679 void sun_reflect_ConstantPool::compute_offsets() {
2680 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2681 // This null test can be removed post beta
2682 if (k != NULL) {
2683 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2684 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2685 }
2686 }
2687
2688 void java_lang_reflect_Parameter::compute_offsets() {
2689 Klass* k = SystemDictionary::reflect_Parameter_klass();
2690 if(NULL != k) {
2691 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2692 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2693 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2694 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2695 }
2696 }
2697
2698 Handle java_lang_reflect_Parameter::create(TRAPS) {
2699 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2700 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2701 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2702 instanceKlassHandle klass (THREAD, k);
2703 // Ensure it is initialized
2704 klass->initialize(CHECK_NH);
2705 return klass->allocate_instance_handle(THREAD);
2706 }
2707
2708 oop java_lang_reflect_Parameter::name(oop param) {
2709 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2710 return param->obj_field(name_offset);
2711 }
2712
2713 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2714 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2715 param->obj_field_put(name_offset, value);
2716 }
2717
2718 int java_lang_reflect_Parameter::modifiers(oop param) {
2719 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2720 return param->int_field(modifiers_offset);
2721 }
2722
2723 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2724 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2725 param->int_field_put(modifiers_offset, value);
2726 }
2727
2728 int java_lang_reflect_Parameter::index(oop param) {
2729 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2730 return param->int_field(index_offset);
2731 }
2732
2733 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2734 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2735 param->int_field_put(index_offset, value);
2736 }
2737
2738 oop java_lang_reflect_Parameter::executable(oop param) {
2739 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2740 return param->obj_field(executable_offset);
2741 }
2742
2743 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2744 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2745 param->obj_field_put(executable_offset, value);
2746 }
2747
2748
2749 Handle sun_reflect_ConstantPool::create(TRAPS) {
2750 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2751 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2752 instanceKlassHandle klass (THREAD, k);
2753 // Ensure it is initialized
2754 klass->initialize(CHECK_NH);
2755 return klass->allocate_instance_handle(THREAD);
2756 }
2757
2758
2759 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2760 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2761 oop mirror = value->pool_holder()->java_mirror();
2762 // Save the mirror to get back the constant pool.
2763 reflect->obj_field_put(_oop_offset, mirror);
2764 }
2765
2766 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2767 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2768
2769 oop mirror = reflect->obj_field(_oop_offset);
2770 Klass* k = java_lang_Class::as_Klass(mirror);
2771 assert(k->is_instance_klass(), "Must be");
2772
2773 // Get the constant pool back from the klass. Since class redefinition
2774 // merges the new constant pool into the old, this is essentially the
2775 // same constant pool as the original. If constant pool merging is
2776 // no longer done in the future, this will have to change to save
2777 // the original.
2778 return InstanceKlass::cast(k)->constants();
2779 }
2780
2781 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2782 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2783 // This null test can be removed post beta
2784 if (k != NULL) {
2785 compute_offset(_base_offset, k,
2786 vmSymbols::base_name(), vmSymbols::object_signature());
2787 }
2788 }
2789
2790 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2791 Klass* k = SystemDictionary::box_klass(type);
2792 if (k == NULL) return NULL;
2793 instanceKlassHandle h (THREAD, k);
2794 if (!h->is_initialized()) h->initialize(CHECK_0);
2795 return h->allocate_instance(THREAD);
2796 }
2797
2798
2799 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2800 oop box = initialize_and_allocate(type, CHECK_0);
2801 if (box == NULL) return NULL;
2802 switch (type) {
2803 case T_BOOLEAN:
2804 box->bool_field_put(value_offset, value->z);
2805 break;
2806 case T_CHAR:
2807 box->char_field_put(value_offset, value->c);
2808 break;
2809 case T_FLOAT:
2810 box->float_field_put(value_offset, value->f);
2811 break;
2812 case T_DOUBLE:
2813 box->double_field_put(long_value_offset, value->d);
2814 break;
2815 case T_BYTE:
2816 box->byte_field_put(value_offset, value->b);
2817 break;
2818 case T_SHORT:
2819 box->short_field_put(value_offset, value->s);
2820 break;
2821 case T_INT:
2822 box->int_field_put(value_offset, value->i);
2823 break;
2824 case T_LONG:
2825 box->long_field_put(long_value_offset, value->j);
2826 break;
2827 default:
2828 return NULL;
2829 }
2830 return box;
2831 }
2832
2833
2834 BasicType java_lang_boxing_object::basic_type(oop box) {
2835 if (box == NULL) return T_ILLEGAL;
2836 BasicType type = SystemDictionary::box_klass_type(box->klass());
2837 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2838 return T_ILLEGAL;
2839 return type;
2840 }
2841
2842
2843 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2844 BasicType type = SystemDictionary::box_klass_type(box->klass());
2845 switch (type) {
2846 case T_BOOLEAN:
2847 value->z = box->bool_field(value_offset);
2848 break;
2849 case T_CHAR:
2850 value->c = box->char_field(value_offset);
2851 break;
2852 case T_FLOAT:
2853 value->f = box->float_field(value_offset);
2854 break;
2855 case T_DOUBLE:
2856 value->d = box->double_field(long_value_offset);
2857 break;
2858 case T_BYTE:
2859 value->b = box->byte_field(value_offset);
2860 break;
2861 case T_SHORT:
2862 value->s = box->short_field(value_offset);
2863 break;
2864 case T_INT:
2865 value->i = box->int_field(value_offset);
2866 break;
2867 case T_LONG:
2868 value->j = box->long_field(long_value_offset);
2869 break;
2870 default:
2871 return T_ILLEGAL;
2872 } // end switch
2873 return type;
2874 }
2875
2876
2877 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2878 BasicType type = SystemDictionary::box_klass_type(box->klass());
2879 switch (type) {
2880 case T_BOOLEAN:
2881 box->bool_field_put(value_offset, value->z);
2882 break;
2883 case T_CHAR:
2884 box->char_field_put(value_offset, value->c);
2885 break;
2886 case T_FLOAT:
2887 box->float_field_put(value_offset, value->f);
2888 break;
2889 case T_DOUBLE:
2890 box->double_field_put(long_value_offset, value->d);
2891 break;
2892 case T_BYTE:
2893 box->byte_field_put(value_offset, value->b);
2894 break;
2895 case T_SHORT:
2896 box->short_field_put(value_offset, value->s);
2897 break;
2898 case T_INT:
2899 box->int_field_put(value_offset, value->i);
2900 break;
2901 case T_LONG:
2902 box->long_field_put(long_value_offset, value->j);
2903 break;
2904 default:
2905 return T_ILLEGAL;
2906 } // end switch
2907 return type;
2908 }
2909
2910
2911 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2912 switch (type) {
2913 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2914 case T_CHAR: st->print("%d", value->c); break;
2915 case T_BYTE: st->print("%d", value->b); break;
2916 case T_SHORT: st->print("%d", value->s); break;
2917 case T_INT: st->print("%d", value->i); break;
2918 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2919 case T_FLOAT: st->print("%f", value->f); break;
2920 case T_DOUBLE: st->print("%lf", value->d); break;
2921 default: st->print("type %d?", type); break;
2922 }
2923 }
2924
2925
2926 // Support for java_lang_ref_Reference
2927 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2928 InstanceKlass* ik = SystemDictionary::Reference_klass();
2929 address addr = ik->static_field_addr(static_lock_offset);
2930 return (HeapWord*) addr;
2931 }
2932
2933 oop java_lang_ref_Reference::pending_list_lock() {
2934 InstanceKlass* ik = SystemDictionary::Reference_klass();
2935 address addr = ik->static_field_addr(static_lock_offset);
2936 if (UseCompressedOops) {
2937 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2938 } else {
2939 return oopDesc::load_decode_heap_oop((oop*)addr);
2940 }
2941 }
2942
2943 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2944 InstanceKlass* ik = SystemDictionary::Reference_klass();
2945 address addr = ik->static_field_addr(static_pending_offset);
2946 // XXX This might not be HeapWord aligned, almost rather be char *.
2947 return (HeapWord*)addr;
2948 }
2949
2950 oop java_lang_ref_Reference::pending_list() {
2951 char *addr = (char *)pending_list_addr();
2952 if (UseCompressedOops) {
2953 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2954 } else {
2955 return oopDesc::load_decode_heap_oop((oop*)addr);
2956 }
2957 }
2958
2959
2960 // Support for java_lang_ref_SoftReference
2961
2962 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2963 return ref->long_field(timestamp_offset);
2964 }
2965
2966 jlong java_lang_ref_SoftReference::clock() {
2967 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
2968 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2969 return *offset;
2970 }
2971
2972 void java_lang_ref_SoftReference::set_clock(jlong value) {
2973 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
2974 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2975 *offset = value;
2976 }
2977
2978 // Support for java_lang_invoke_DirectMethodHandle
2979
2980 int java_lang_invoke_DirectMethodHandle::_member_offset;
2981
2982 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2983 oop member_name = NULL;
2984 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2985 assert(is_dmh, "a DirectMethodHandle oop is expected");
2986 if (is_dmh) {
2987 member_name = dmh->obj_field(member_offset_in_bytes());
2988 }
2989 return member_name;
2990 }
2991
2992 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2993 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2994 if (klass_oop != NULL) {
2995 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2996 }
2997 }
2998
2999 // Support for java_lang_invoke_MethodHandle
3000
3001 int java_lang_invoke_MethodHandle::_type_offset;
3002 int java_lang_invoke_MethodHandle::_form_offset;
3003
3004 int java_lang_invoke_MemberName::_clazz_offset;
3005 int java_lang_invoke_MemberName::_name_offset;
3006 int java_lang_invoke_MemberName::_type_offset;
3007 int java_lang_invoke_MemberName::_flags_offset;
3008 int java_lang_invoke_MemberName::_vmtarget_offset;
3009 int java_lang_invoke_MemberName::_vmloader_offset;
3010 int java_lang_invoke_MemberName::_vmindex_offset;
3011
3012 int java_lang_invoke_LambdaForm::_vmentry_offset;
3013
3014 void java_lang_invoke_MethodHandle::compute_offsets() {
3015 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
3016 if (klass_oop != NULL) {
3017 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
3018 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
3019 }
3020 }
3021
3022 void java_lang_invoke_MemberName::compute_offsets() {
3023 Klass* klass_oop = SystemDictionary::MemberName_klass();
3024 if (klass_oop != NULL) {
3025 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
3026 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
3027 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
3028 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
3029 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3030 }
3031 }
3032
3033 void java_lang_invoke_LambdaForm::compute_offsets() {
3034 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
3035 if (klass_oop != NULL) {
3036 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
3037 }
3038 }
3039
3040 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3041 return obj != NULL && is_subclass(obj->klass());
3042 }
3043
3044
3045 oop java_lang_invoke_MethodHandle::type(oop mh) {
3046 return mh->obj_field(_type_offset);
3047 }
3048
3049 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3050 mh->obj_field_put(_type_offset, mtype);
3051 }
3052
3053 oop java_lang_invoke_MethodHandle::form(oop mh) {
3054 assert(_form_offset != 0, "");
3055 return mh->obj_field(_form_offset);
3056 }
3057
3058 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3059 assert(_form_offset != 0, "");
3060 mh->obj_field_put(_form_offset, lform);
3061 }
3062
3063 /// MemberName accessors
3064
3065 oop java_lang_invoke_MemberName::clazz(oop mname) {
3066 assert(is_instance(mname), "wrong type");
3067 return mname->obj_field(_clazz_offset);
3068 }
3069
3070 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3071 assert(is_instance(mname), "wrong type");
3072 mname->obj_field_put(_clazz_offset, clazz);
3073 }
3074
3075 oop java_lang_invoke_MemberName::name(oop mname) {
3076 assert(is_instance(mname), "wrong type");
3077 return mname->obj_field(_name_offset);
3078 }
3079
3080 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3081 assert(is_instance(mname), "wrong type");
3082 mname->obj_field_put(_name_offset, name);
3083 }
3084
3085 oop java_lang_invoke_MemberName::type(oop mname) {
3086 assert(is_instance(mname), "wrong type");
3087 return mname->obj_field(_type_offset);
3088 }
3089
3090 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3091 assert(is_instance(mname), "wrong type");
3092 mname->obj_field_put(_type_offset, type);
3093 }
3094
3095 int java_lang_invoke_MemberName::flags(oop mname) {
3096 assert(is_instance(mname), "wrong type");
3097 return mname->int_field(_flags_offset);
3098 }
3099
3100 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3101 assert(is_instance(mname), "wrong type");
3102 mname->int_field_put(_flags_offset, flags);
3103 }
3104
3105 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
3106 assert(is_instance(mname), "wrong type");
3107 return (Metadata*)mname->address_field(_vmtarget_offset);
3108 }
3109
3110 bool java_lang_invoke_MemberName::is_method(oop mname) {
3111 assert(is_instance(mname), "must be MemberName");
3112 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3113 }
3114
3115 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
3116 assert(is_instance(mname), "wrong type");
3117 // check the type of the vmtarget
3118 oop dependency = NULL;
3119 if (ref != NULL) {
3120 switch (flags(mname) & (MN_IS_METHOD |
3121 MN_IS_CONSTRUCTOR |
3122 MN_IS_FIELD)) {
3123 case MN_IS_METHOD:
3124 case MN_IS_CONSTRUCTOR:
3125 assert(ref->is_method(), "should be a method");
3126 dependency = ((Method*)ref)->method_holder()->java_mirror();
3127 break;
3128 case MN_IS_FIELD:
3129 assert(ref->is_klass(), "should be a class");
3130 dependency = ((Klass*)ref)->java_mirror();
3131 break;
3132 default:
3133 ShouldNotReachHere();
3134 }
3135 }
3136 mname->address_field_put(_vmtarget_offset, (address)ref);
3137 // Add a reference to the loader (actually mirror because anonymous classes will not have
3138 // distinct loaders) to ensure the metadata is kept alive
3139 // This mirror may be different than the one in clazz field.
3140 mname->obj_field_put(_vmloader_offset, dependency);
3141 }
3142
3143 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3144 assert(is_instance(mname), "wrong type");
3145 return (intptr_t) mname->address_field(_vmindex_offset);
3146 }
3147
3148 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3149 assert(is_instance(mname), "wrong type");
3150 mname->address_field_put(_vmindex_offset, (address) index);
3151 }
3152
3153 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3154 assert(is_instance(lform), "wrong type");
3155 return lform->obj_field(_vmentry_offset);
3156 }
3157
3158
3159 // Support for java_lang_invoke_MethodType
3160
3161 int java_lang_invoke_MethodType::_rtype_offset;
3162 int java_lang_invoke_MethodType::_ptypes_offset;
3163
3164 void java_lang_invoke_MethodType::compute_offsets() {
3165 Klass* k = SystemDictionary::MethodType_klass();
3166 if (k != NULL) {
3167 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
3168 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
3169 }
3170 }
3171
3172 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3173 st->print("(");
3174 objArrayOop pts = ptypes(mt);
3175 for (int i = 0, limit = pts->length(); i < limit; i++) {
3176 java_lang_Class::print_signature(pts->obj_at(i), st);
3177 }
3178 st->print(")");
3179 java_lang_Class::print_signature(rtype(mt), st);
3180 }
3181
3182 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3183 ResourceMark rm;
3184 stringStream buffer(128);
3185 print_signature(mt, &buffer);
3186 const char* sigstr = buffer.base();
3187 int siglen = (int) buffer.size();
3188 Symbol *name;
3189 if (!intern_if_not_found) {
3190 name = SymbolTable::probe(sigstr, siglen);
3191 } else {
3192 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3193 }
3194 return name;
3195 }
3196
3197 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3198 if (mt1 == mt2)
3199 return true;
3200 if (rtype(mt1) != rtype(mt2))
3201 return false;
3202 if (ptype_count(mt1) != ptype_count(mt2))
3203 return false;
3204 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3205 if (ptype(mt1, i) != ptype(mt2, i))
3206 return false;
3207 }
3208 return true;
3209 }
3210
3211 oop java_lang_invoke_MethodType::rtype(oop mt) {
3212 assert(is_instance(mt), "must be a MethodType");
3213 return mt->obj_field(_rtype_offset);
3214 }
3215
3216 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3217 assert(is_instance(mt), "must be a MethodType");
3218 return (objArrayOop) mt->obj_field(_ptypes_offset);
3219 }
3220
3221 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3222 return ptypes(mt)->obj_at(idx);
3223 }
3224
3225 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3226 return ptypes(mt)->length();
3227 }
3228
3229 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3230 objArrayOop pts = ptypes(mt);
3231 int count = pts->length();
3232 int slots = 0;
3233 for (int i = 0; i < count; i++) {
3234 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3235 slots += type2size[bt];
3236 }
3237 return slots;
3238 }
3239
3240 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3241 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3242 return type2size[bt];
3243 }
3244
3245
3246 // Support for java_lang_invoke_CallSite
3247
3248 int java_lang_invoke_CallSite::_target_offset;
3249 int java_lang_invoke_CallSite::_context_offset;
3250
3251 void java_lang_invoke_CallSite::compute_offsets() {
3252 Klass* k = SystemDictionary::CallSite_klass();
3253 if (k != NULL) {
3254 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
3255 compute_offset(_context_offset, k, vmSymbols::context_name(),
3256 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature());
3257 }
3258 }
3259
3260 oop java_lang_invoke_CallSite::context(oop call_site) {
3261 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3262
3263 oop dep_oop = call_site->obj_field(_context_offset);
3264 return dep_oop;
3265 }
3266
3267 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3268
3269 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3270
3271 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3272 Klass* k = SystemDictionary::Context_klass();
3273 if (k != NULL) {
3274 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3275 }
3276 }
3277
3278 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3279 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3280 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset);
3281 DependencyContext dep_ctx(vmdeps_addr);
3282 return dep_ctx;
3283 }
3284
3285 // Support for java_security_AccessControlContext
3286
3287 int java_security_AccessControlContext::_context_offset = 0;
3288 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3289 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3290 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3291
3292 void java_security_AccessControlContext::compute_offsets() {
3293 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3294 fieldDescriptor fd;
3295 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass();
3296
3297 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3298 fatal("Invalid layout of java.security.AccessControlContext");
3299 }
3300 _context_offset = fd.offset();
3301
3302 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3303 fatal("Invalid layout of java.security.AccessControlContext");
3304 }
3305 _privilegedContext_offset = fd.offset();
3306
3307 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3308 fatal("Invalid layout of java.security.AccessControlContext");
3309 }
3310 _isPrivileged_offset = fd.offset();
3311
3312 // The offset may not be present for bootstrapping with older JDK.
3313 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3314 _isAuthorized_offset = fd.offset();
3315 }
3316 }
3317
3318
3319 bool java_security_AccessControlContext::is_authorized(Handle context) {
3320 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3321 assert(_isAuthorized_offset != -1, "should be set");
3322 return context->bool_field(_isAuthorized_offset) != 0;
3323 }
3324
3325 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3326 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3327 // Ensure klass is initialized
3328 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3329 // Allocate result
3330 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3331 // Fill in values
3332 result->obj_field_put(_context_offset, context());
3333 result->obj_field_put(_privilegedContext_offset, privileged_context());
3334 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3335 // whitelist AccessControlContexts created by the JVM if present
3336 if (_isAuthorized_offset != -1) {
3337 result->bool_field_put(_isAuthorized_offset, true);
3338 }
3339 return result;
3340 }
3341
3342
3343 // Support for java_lang_ClassLoader
3344
3345 bool java_lang_ClassLoader::offsets_computed = false;
3346 int java_lang_ClassLoader::_loader_data_offset = -1;
3347 int java_lang_ClassLoader::parallelCapable_offset = -1;
3348
3349 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3350 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3351 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3352 }
3353
3354 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3355 return *java_lang_ClassLoader::loader_data_addr(loader);
3356 }
3357
3358 void java_lang_ClassLoader::compute_offsets() {
3359 assert(!offsets_computed, "offsets should be initialized only once");
3360 offsets_computed = true;
3361
3362 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3363 Klass* k1 = SystemDictionary::ClassLoader_klass();
3364 compute_optional_offset(parallelCapable_offset,
3365 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3366
3367 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3368 }
3369
3370 oop java_lang_ClassLoader::parent(oop loader) {
3371 assert(is_instance(loader), "loader must be oop");
3372 return loader->obj_field(parent_offset);
3373 }
3374
3375 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3376 assert(is_instance(loader), "loader must be oop");
3377 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3378 oop acl = loader;
3379 debug_only(jint loop_count = 0);
3380 // This loop taken verbatim from ClassLoader.java:
3381 do {
3382 acl = parent(acl);
3383 if (cl == acl) {
3384 return true;
3385 }
3386 assert(++loop_count > 0, "loop_count overflow");
3387 } while (acl != NULL);
3388 return false;
3389 }
3390
3391 bool java_lang_ClassLoader::is_instance(oop obj) {
3392 return obj != NULL && is_subclass(obj->klass());
3393 }
3394
3395
3396 // For class loader classes, parallelCapable defined
3397 // based on non-null field
3398 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3399 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3400 if (parallelCapable_offset == -1) {
3401 // Default for backward compatibility is false
3402 return false;
3403 }
3404 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3405 }
3406
3407 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3408 // Fix for 4474172; see evaluation for more details
3409 loader = non_reflection_class_loader(loader);
3410
3411 oop cl = SystemDictionary::java_system_loader();
3412 while(cl != NULL) {
3413 if (cl == loader) return true;
3414 cl = parent(cl);
3415 }
3416 return false;
3417 }
3418
3419 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3420 if (loader != NULL) {
3421 // See whether this is one of the class loaders associated with
3422 // the generated bytecodes for reflection, and if so, "magically"
3423 // delegate to its parent to prevent class loading from occurring
3424 // in places where applications using reflection didn't expect it.
3425 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3426 // This might be null in non-1.4 JDKs
3427 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3428 return parent(loader);
3429 }
3430 }
3431 return loader;
3432 }
3433
3434
3435 // Support for java_lang_System
3436 int java_lang_System::in_offset_in_bytes() {
3437 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3438 }
3439
3440
3441 int java_lang_System::out_offset_in_bytes() {
3442 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3443 }
3444
3445
3446 int java_lang_System::err_offset_in_bytes() {
3447 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3448 }
3449
3450
3451 bool java_lang_System::has_security_manager() {
3452 InstanceKlass* ik = SystemDictionary::System_klass();
3453 address addr = ik->static_field_addr(static_security_offset);
3454 if (UseCompressedOops) {
3455 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3456 } else {
3457 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3458 }
3459 }
3460
3461 int java_lang_Class::_klass_offset;
3462 int java_lang_Class::_array_klass_offset;
3463 int java_lang_Class::_oop_size_offset;
3464 int java_lang_Class::_static_oop_field_count_offset;
3465 int java_lang_Class::_class_loader_offset;
3466 int java_lang_Class::_protection_domain_offset;
3467 int java_lang_Class::_component_mirror_offset;
3468 int java_lang_Class::_init_lock_offset;
3469 int java_lang_Class::_signers_offset;
3470 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3471 int java_lang_Throwable::backtrace_offset;
3472 int java_lang_Throwable::detailMessage_offset;
3473 int java_lang_Throwable::cause_offset;
3474 int java_lang_Throwable::stackTrace_offset;
3475 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3476 int java_lang_reflect_AccessibleObject::override_offset;
3477 int java_lang_reflect_Method::clazz_offset;
3478 int java_lang_reflect_Method::name_offset;
3479 int java_lang_reflect_Method::returnType_offset;
3480 int java_lang_reflect_Method::parameterTypes_offset;
3481 int java_lang_reflect_Method::exceptionTypes_offset;
3482 int java_lang_reflect_Method::slot_offset;
3483 int java_lang_reflect_Method::modifiers_offset;
3484 int java_lang_reflect_Method::signature_offset;
3485 int java_lang_reflect_Method::annotations_offset;
3486 int java_lang_reflect_Method::parameter_annotations_offset;
3487 int java_lang_reflect_Method::annotation_default_offset;
3488 int java_lang_reflect_Method::type_annotations_offset;
3489 int java_lang_reflect_Constructor::clazz_offset;
3490 int java_lang_reflect_Constructor::parameterTypes_offset;
3491 int java_lang_reflect_Constructor::exceptionTypes_offset;
3492 int java_lang_reflect_Constructor::slot_offset;
3493 int java_lang_reflect_Constructor::modifiers_offset;
3494 int java_lang_reflect_Constructor::signature_offset;
3495 int java_lang_reflect_Constructor::annotations_offset;
3496 int java_lang_reflect_Constructor::parameter_annotations_offset;
3497 int java_lang_reflect_Constructor::type_annotations_offset;
3498 int java_lang_reflect_Field::clazz_offset;
3499 int java_lang_reflect_Field::name_offset;
3500 int java_lang_reflect_Field::type_offset;
3501 int java_lang_reflect_Field::slot_offset;
3502 int java_lang_reflect_Field::modifiers_offset;
3503 int java_lang_reflect_Field::signature_offset;
3504 int java_lang_reflect_Field::annotations_offset;
3505 int java_lang_reflect_Field::type_annotations_offset;
3506 int java_lang_reflect_Parameter::name_offset;
3507 int java_lang_reflect_Parameter::modifiers_offset;
3508 int java_lang_reflect_Parameter::index_offset;
3509 int java_lang_reflect_Parameter::executable_offset;
3510 int java_lang_boxing_object::value_offset;
3511 int java_lang_boxing_object::long_value_offset;
3512 int java_lang_ref_Reference::referent_offset;
3513 int java_lang_ref_Reference::queue_offset;
3514 int java_lang_ref_Reference::next_offset;
3515 int java_lang_ref_Reference::discovered_offset;
3516 int java_lang_ref_Reference::static_lock_offset;
3517 int java_lang_ref_Reference::static_pending_offset;
3518 int java_lang_ref_Reference::number_of_fake_oop_fields;
3519 int java_lang_ref_SoftReference::timestamp_offset;
3520 int java_lang_ref_SoftReference::static_clock_offset;
3521 int java_lang_ClassLoader::parent_offset;
3522 int java_lang_System::static_in_offset;
3523 int java_lang_System::static_out_offset;
3524 int java_lang_System::static_err_offset;
3525 int java_lang_System::static_security_offset;
3526 int java_lang_StackTraceElement::declaringClass_offset;
3527 int java_lang_StackTraceElement::methodName_offset;
3528 int java_lang_StackTraceElement::fileName_offset;
3529 int java_lang_StackTraceElement::lineNumber_offset;
3530 int java_lang_StackFrameInfo::_declaringClass_offset;
3531 int java_lang_StackFrameInfo::_memberName_offset;
3532 int java_lang_StackFrameInfo::_bci_offset;
3533 int java_lang_StackFrameInfo::_methodName_offset;
3534 int java_lang_StackFrameInfo::_fileName_offset;
3535 int java_lang_StackFrameInfo::_lineNumber_offset;
3536 int java_lang_StackFrameInfo::_mid_offset;
3537 int java_lang_StackFrameInfo::_version_offset;
3538 int java_lang_StackFrameInfo::_cpref_offset;
3539 int java_lang_LiveStackFrameInfo::_monitors_offset;
3540 int java_lang_LiveStackFrameInfo::_locals_offset;
3541 int java_lang_LiveStackFrameInfo::_operands_offset;
3542 int java_lang_AssertionStatusDirectives::classes_offset;
3543 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3544 int java_lang_AssertionStatusDirectives::packages_offset;
3545 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3546 int java_lang_AssertionStatusDirectives::deflt_offset;
3547 int java_nio_Buffer::_limit_offset;
3548 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3549 int sun_reflect_ConstantPool::_oop_offset;
3550 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3551
3552
3553 // Support for java_lang_StackTraceElement
3554
3555 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3556 element->obj_field_put(fileName_offset, value);
3557 }
3558
3559 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3560 element->obj_field_put(declaringClass_offset, value);
3561 }
3562
3563 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3564 element->obj_field_put(methodName_offset, value);
3565 }
3566
3567 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3568 element->int_field_put(lineNumber_offset, value);
3569 }
3570
3571 // Support for java_lang_StackFrameInfo
3572 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) {
3573 element->obj_field_put(_declaringClass_offset, value);
3574 }
3575
3576 void java_lang_StackFrameInfo::set_mid(oop element, short value) {
3577 element->short_field_put(_mid_offset, value);
3578 }
3579
3580 void java_lang_StackFrameInfo::set_version(oop element, short value) {
3581 element->short_field_put(_version_offset, value);
3582 }
3583
3584 void java_lang_StackFrameInfo::set_cpref(oop element, short value) {
3585 element->short_field_put(_cpref_offset, value);
3586 }
3587
3588 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
3589 element->int_field_put(_bci_offset, value);
3590 }
3591
3592 void java_lang_StackFrameInfo::set_fileName(oop element, oop value) {
3593 element->obj_field_put(_fileName_offset, value);
3594 }
3595
3596 void java_lang_StackFrameInfo::set_methodName(oop element, oop value) {
3597 element->obj_field_put(_methodName_offset, value);
3598 }
3599
3600 void java_lang_StackFrameInfo::set_lineNumber(oop element, int value) {
3601 element->int_field_put(_lineNumber_offset, value);
3602 }
3603
3604 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
3605 element->obj_field_put(_monitors_offset, value);
3606 }
3607
3608 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
3609 element->obj_field_put(_locals_offset, value);
3610 }
3611
3612 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
3613 element->obj_field_put(_operands_offset, value);
3614 }
3615
3616 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3617
3618 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3619 o->obj_field_put(classes_offset, val);
3620 }
3621
3622 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3623 o->obj_field_put(classEnabled_offset, val);
3624 }
3625
3626 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3627 o->obj_field_put(packages_offset, val);
3628 }
3629
3630 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3631 o->obj_field_put(packageEnabled_offset, val);
3632 }
3633
3634 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3635 o->bool_field_put(deflt_offset, val);
3636 }
3637
3638
3639 // Support for intrinsification of java.nio.Buffer.checkIndex
3640 int java_nio_Buffer::limit_offset() {
3641 return _limit_offset;
3642 }
3643
3644
3645 void java_nio_Buffer::compute_offsets() {
3646 Klass* k = SystemDictionary::nio_Buffer_klass();
3647 assert(k != NULL, "must be loaded in 1.4+");
3648 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3649 }
3650
3651 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3652 if (_owner_offset != 0) return;
3653
3654 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3655 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3656 compute_offset(_owner_offset, k,
3657 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3658 }
3659
3660 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3661 assert(_owner_offset != 0, "Must be initialized");
3662 return obj->obj_field(_owner_offset);
3663 }
3664
3665 // Compute hard-coded offsets
3666 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3667 // are not available to determine the offset_of_static_fields.
3668 void JavaClasses::compute_hard_coded_offsets() {
3669 const int x = heapOopSize;
3670 const int header = instanceOopDesc::base_offset_in_bytes();
3671
3672 // Throwable Class
3673 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3674 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3675 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3676 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3677 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3678
3679 // java_lang_boxing_object
3680 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3681 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3682
3683 // java_lang_ref_Reference:
3684 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3685 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3686 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3687 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3688 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3689 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3690 // Artificial fields for java_lang_ref_Reference
3691 // The first field is for the discovered field added in 1.4
3692 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3693
3694 // java_lang_ref_SoftReference Class
3695 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3696 // Don't multiply static fields because they are always in wordSize units
3697 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3698
3699 // java_lang_ClassLoader
3700 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3701
3702 // java_lang_System
3703 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3704 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3705 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3706 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3707
3708 // java_lang_StackTraceElement
3709 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3710 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3711 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3712 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3713 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3714 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3715 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3716 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3717 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3718
3719 }
3720
3721
3722 // Compute non-hard-coded field offsets of all the classes in this file
3723 void JavaClasses::compute_offsets() {
3724 // java_lang_Class::compute_offsets was called earlier in bootstrap
3725 java_lang_ClassLoader::compute_offsets();
3726 java_lang_Thread::compute_offsets();
3727 java_lang_ThreadGroup::compute_offsets();
3728 java_lang_invoke_MethodHandle::compute_offsets();
3729 java_lang_invoke_DirectMethodHandle::compute_offsets();
3730 java_lang_invoke_MemberName::compute_offsets();
3731 java_lang_invoke_LambdaForm::compute_offsets();
3732 java_lang_invoke_MethodType::compute_offsets();
3733 java_lang_invoke_CallSite::compute_offsets();
3734 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3735 java_security_AccessControlContext::compute_offsets();
3736 // Initialize reflection classes. The layouts of these classes
3737 // changed with the new reflection implementation in JDK 1.4, and
3738 // since the Universe doesn't know what JDK version it is until this
3739 // point we defer computation of these offsets until now.
3740 java_lang_reflect_AccessibleObject::compute_offsets();
3741 java_lang_reflect_Method::compute_offsets();
3742 java_lang_reflect_Constructor::compute_offsets();
3743 java_lang_reflect_Field::compute_offsets();
3744 java_nio_Buffer::compute_offsets();
3745 sun_reflect_ConstantPool::compute_offsets();
3746 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3747 java_lang_reflect_Parameter::compute_offsets();
3748 java_lang_StackFrameInfo::compute_offsets();
3749 java_lang_LiveStackFrameInfo::compute_offsets();
3750
3751 // generated interpreter code wants to know about the offsets we just computed:
3752 AbstractAssembler::update_delayed_values();
3753 }
3754
3755 #ifndef PRODUCT
3756
3757 // These functions exist to assert the validity of hard-coded field offsets to guard
3758 // against changes in the class files
3759
3760 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3761 EXCEPTION_MARK;
3762 fieldDescriptor fd;
3763 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3764 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3765 instanceKlassHandle h_klass (THREAD, k);
3766 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3767 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3768 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3769 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3770 return false;
3771 }
3772 if (fd.is_static()) {
3773 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3774 return false;
3775 }
3776 if (fd.offset() == hardcoded_offset ) {
3777 return true;
3778 } else {
3779 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3780 klass_name, field_name, hardcoded_offset, fd.offset());
3781 return false;
3782 }
3783 }
3784
3785
3786 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3787 EXCEPTION_MARK;
3788 fieldDescriptor fd;
3789 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3790 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3791 instanceKlassHandle h_klass (THREAD, k);
3792 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3793 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3794 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3795 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3796 return false;
3797 }
3798 if (!fd.is_static()) {
3799 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3800 return false;
3801 }
3802 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3803 return true;
3804 } else {
3805 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());
3806 return false;
3807 }
3808 }
3809
3810
3811 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3812 EXCEPTION_MARK;
3813 fieldDescriptor fd;
3814 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3815 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3816 instanceKlassHandle h_klass (THREAD, k);
3817 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3818 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3819 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3820 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3821 return false;
3822 }
3823 if (!fd.is_static() || !fd.has_initial_value()) {
3824 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3825 return false;
3826 }
3827 if (!fd.initial_value_tag().is_int()) {
3828 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3829 return false;
3830 }
3831 jint field_value = fd.int_initial_value();
3832 if (field_value == hardcoded_constant) {
3833 return true;
3834 } else {
3835 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);
3836 return false;
3837 }
3838 }
3839
3840
3841 // Check the hard-coded field offsets of all the classes in this file
3842
3843 void JavaClasses::check_offsets() {
3844 bool valid = true;
3845 HandleMark hm;
3846
3847 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3848 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3849
3850 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3851 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3852
3853 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3854 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3855
3856 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3857 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3858
3859 // java.lang.String
3860
3861 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B");
3862 if (java_lang_String::has_hash_field()) {
3863 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3864 }
3865 if (java_lang_String::has_coder_field()) {
3866 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B");
3867 }
3868
3869 // java.lang.Class
3870
3871 // Fake fields
3872 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3873 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3874
3875 // java.lang.Throwable
3876
3877 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3878 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3879 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3880 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3881
3882 // Boxed primitive objects (java_lang_boxing_object)
3883
3884 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3885 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3886 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3887 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3888 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3889 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3890 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3891 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3892
3893 // java.lang.ClassLoader
3894
3895 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3896
3897 // java.lang.System
3898
3899 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3900 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3901 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3902 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3903
3904 // java.lang.StackTraceElement
3905
3906 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3907 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3908 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3909 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3910
3911 // java.lang.ref.Reference
3912
3913 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3914 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3915 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3916 // Fake field
3917 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3918 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3919 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3920
3921 // java.lang.ref.SoftReference
3922
3923 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3924 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3925
3926 // java.lang.AssertionStatusDirectives
3927 //
3928 // The CheckAssertionStatusDirectives boolean can be removed from here and
3929 // globals.hpp after the AssertionStatusDirectives class has been integrated
3930 // into merlin "for some time." Without it, the vm will fail with early
3931 // merlin builds.
3932
3933 if (CheckAssertionStatusDirectives) {
3934 const char* nm = "java/lang/AssertionStatusDirectives";
3935 const char* sig = "[Ljava/lang/String;";
3936 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3937 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3938 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3939 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3940 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3941 }
3942
3943 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3944 }
3945
3946 #endif // PRODUCT
3947
3948 int InjectedField::compute_offset() {
3949 InstanceKlass* ik = InstanceKlass::cast(klass());
3950 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
3951 if (!may_be_java && !fs.access_flags().is_internal()) {
3952 // Only look at injected fields
3953 continue;
3954 }
3955 if (fs.name() == name() && fs.signature() == signature()) {
3956 return fs.offset();
3957 }
3958 }
3959 ResourceMark rm;
3960 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)" : "");
3961 #ifndef PRODUCT
3962 ik->print();
3963 tty->print_cr("all fields:");
3964 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
3965 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3966 }
3967 #endif //PRODUCT
3968 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
3969 return -1;
3970 }
3971
3972 void javaClasses_init() {
3973 JavaClasses::compute_offsets();
3974 JavaClasses::check_offsets();
3975 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3976 }