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