1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/classLoaderData.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/debugInfo.hpp"
33 #include "code/dependencyContext.hpp"
34 #include "code/pcDesc.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "logging/log.hpp"
38 #include "logging/logStream.hpp"
39 #include "memory/heapShared.inline.hpp"
40 #include "memory/metaspaceShared.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.hpp"
44 #include "oops/fieldStreams.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/instanceMirrorKlass.hpp"
47 #include "oops/klass.hpp"
48 #include "oops/method.inline.hpp"
49 #include "oops/objArrayOop.inline.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "oops/typeArrayOop.inline.hpp"
53 #include "prims/resolvedMethodTable.hpp"
54 #include "runtime/fieldDescriptor.inline.hpp"
55 #include "runtime/frame.inline.hpp"
56 #include "runtime/handles.inline.hpp"
57 #include "runtime/interfaceSupport.inline.hpp"
58 #include "runtime/java.hpp"
59 #include "runtime/javaCalls.hpp"
60 #include "runtime/jniHandles.inline.hpp"
61 #include "runtime/safepoint.hpp"
62 #include "runtime/safepointVerifiers.hpp"
63 #include "runtime/thread.inline.hpp"
64 #include "runtime/vframe.inline.hpp"
65 #include "utilities/align.hpp"
66 #include "utilities/preserveException.hpp"
67 #if INCLUDE_JVMCI
68 #include "jvmci/jvmciJavaClasses.hpp"
69 #endif
70
71 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
72 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
73
74 #if INCLUDE_CDS
75 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
76 f->do_u4((u4*)&_##name##_offset);
77 #endif
78
79 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
80 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
81
82 InjectedField JavaClasses::_injected_fields[] = {
83 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
84 };
85
86 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
87 return _injected_fields[id].compute_offset();
88 }
89
90 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
91 *field_count = 0;
92
93 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
94 if (sid == vmSymbols::NO_SID) {
95 // Only well known classes can inject fields
96 return NULL;
97 }
98
99 int count = 0;
100 int start = -1;
101
102 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
103 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
104 count++; \
105 if (start == -1) start = klass##_##name##_enum; \
106 }
107 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
108 #undef LOOKUP_INJECTED_FIELD
109
110 if (start != -1) {
111 *field_count = count;
112 return _injected_fields + start;
113 }
114 return NULL;
115 }
116
117
118 // Helpful routine for computing field offsets at run time rather than hardcoding them
119 // Finds local fields only, including static fields. Static field offsets are from the
120 // beginning of the mirror.
121 static void compute_offset(int &dest_offset,
122 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
123 bool is_static = false) {
124 fieldDescriptor fd;
125 if (ik == NULL) {
126 ResourceMark rm;
127 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
128 vm_exit_during_initialization("Invalid layout of preloaded class");
129 }
130
131 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
132 ResourceMark rm;
133 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
134 name_symbol->as_C_string(), signature_symbol->as_C_string());
135 #ifndef PRODUCT
136 // Prints all fields and offsets
137 Log(class) lt;
138 LogStream ls(lt.error());
139 ik->print_on(&ls);
140 #endif //PRODUCT
141 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
142 }
143 dest_offset = fd.offset();
144 }
145
146 // Overloading to pass name as a string.
147 static void compute_offset(int& dest_offset, InstanceKlass* ik,
148 const char* name_string, Symbol* signature_symbol,
149 bool is_static = false) {
150 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
151 if (name == NULL) {
152 ResourceMark rm;
153 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
154 vm_exit_during_initialization("Invalid layout of preloaded class", ik->external_name());
155 }
156 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
157 }
158
159 int java_lang_String::value_offset = 0;
160 int java_lang_String::hash_offset = 0;
161 int java_lang_String::coder_offset = 0;
162
163 bool java_lang_String::initialized = false;
164
165 bool java_lang_String::is_instance(oop obj) {
166 return is_instance_inlined(obj);
167 }
168
169 #if INCLUDE_CDS
170 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
171 f->do_u4((u4*)&offset)
172 #endif
173
174 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
175 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
176
177 #define STRING_FIELDS_DO(macro) \
178 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
179 macro(hash_offset, k, "hash", int_signature, false); \
180 macro(coder_offset, k, "coder", byte_signature, false)
181
182 void java_lang_String::compute_offsets() {
183 if (initialized) {
184 return;
185 }
186
187 InstanceKlass* k = SystemDictionary::String_klass();
188 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
189
190 initialized = true;
191 }
192
193 #if INCLUDE_CDS
194 void java_lang_String::serialize_offsets(SerializeClosure* f) {
195 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
196 f->do_u4((u4*)&initialized);
197 }
198 #endif
199
200 class CompactStringsFixup : public FieldClosure {
201 private:
202 bool _value;
203
204 public:
205 CompactStringsFixup(bool value) : _value(value) {}
206
207 void do_field(fieldDescriptor* fd) {
208 if (fd->name() == vmSymbols::compact_strings_name()) {
209 oop mirror = fd->field_holder()->java_mirror();
210 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
211 assert(mirror != NULL, "String must have mirror already");
212 mirror->bool_field_put(fd->offset(), _value);
213 }
214 }
215 };
216
217 void java_lang_String::set_compact_strings(bool value) {
218 CompactStringsFixup fix(value);
219 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
220 }
221
222 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
223 assert(initialized, "Must be initialized");
224 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
225
226 // Create the String object first, so there's a chance that the String
227 // and the char array it points to end up in the same cache line.
228 oop obj;
229 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
230
231 // Create the char array. The String object must be handlized here
232 // because GC can happen as a result of the allocation attempt.
233 Handle h_obj(THREAD, obj);
234 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
235 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
236
237 // Point the String at the char array
238 obj = h_obj();
239 set_value(obj, buffer);
240 // No need to zero the offset, allocation zero'ed the entire String object
241 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
242 return h_obj;
243 }
244
245 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
246 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
247 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
248 typeArrayOop buffer = value(h_obj());
249 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
250 if (is_latin1) {
251 for (int index = 0; index < length; index++) {
252 buffer->byte_at_put(index, (jbyte)unicode[index]);
253 }
254 } else {
255 for (int index = 0; index < length; index++) {
256 buffer->char_at_put(index, unicode[index]);
257 }
258 }
259
260 #ifdef ASSERT
261 {
262 ResourceMark rm;
263 char* expected = UNICODE::as_utf8(unicode, length);
264 char* actual = as_utf8_string(h_obj());
265 if (strcmp(expected, actual) != 0) {
266 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
267 ShouldNotReachHere();
268 }
269 }
270 #endif
271
272 return h_obj;
273 }
274
275 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
276 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
277 return h_obj();
278 }
279
280 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
281 if (utf8_str == NULL) {
282 return Handle();
283 }
284 bool has_multibyte, is_latin1;
285 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
286 if (!CompactStrings) {
287 has_multibyte = true;
288 is_latin1 = false;
289 }
290
291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
292 if (length > 0) {
293 if (!has_multibyte) {
294 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
295 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
296 } else if (is_latin1) {
297 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
298 } else {
299 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
300 }
301 }
302
303 #ifdef ASSERT
304 // This check is too strict because the input string is not necessarily valid UTF8.
305 // For example, it may be created with arbitrary content via jni_NewStringUTF.
306 /*
307 {
308 ResourceMark rm;
309 const char* expected = utf8_str;
310 char* actual = as_utf8_string(h_obj());
311 if (strcmp(expected, actual) != 0) {
312 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
313 ShouldNotReachHere();
314 }
315 }
316 */
317 #endif
318
319 return h_obj;
320 }
321
322 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
323 Handle h_obj = create_from_str(utf8_str, CHECK_0);
324 return h_obj();
325 }
326
327 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
328 const char* utf8_str = (char*)symbol->bytes();
329 int utf8_len = symbol->utf8_length();
330
331 bool has_multibyte, is_latin1;
332 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
333 if (!CompactStrings) {
334 has_multibyte = true;
335 is_latin1 = false;
336 }
337
338 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
339 if (length > 0) {
340 if (!has_multibyte) {
341 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
342 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
343 } else if (is_latin1) {
344 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
345 } else {
346 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
347 }
348 }
349
350 #ifdef ASSERT
351 {
352 ResourceMark rm;
353 const char* expected = symbol->as_utf8();
354 char* actual = as_utf8_string(h_obj());
355 if (strncmp(expected, actual, utf8_len) != 0) {
356 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
357 ShouldNotReachHere();
358 }
359 }
360 #endif
361
362 return h_obj;
363 }
364
365 // Converts a C string to a Java String based on current encoding
366 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
367 assert(str != NULL, "bad arguments");
368
369 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
370 static to_java_string_fn_t _to_java_string_fn = NULL;
371
372 if (_to_java_string_fn == NULL) {
373 void *lib_handle = os::native_java_library();
374 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
375 if (_to_java_string_fn == NULL) {
376 fatal("NewStringPlatform missing");
377 }
378 }
379
380 jstring js = NULL;
381 { JavaThread* thread = (JavaThread*)THREAD;
382 assert(thread->is_Java_thread(), "must be java thread");
383 HandleMark hm(thread);
384 ThreadToNativeFromVM ttn(thread);
385 js = (_to_java_string_fn)(thread->jni_environment(), str);
386 }
387 return Handle(THREAD, JNIHandles::resolve(js));
388 }
389
390 // Converts a Java String to a native C string that can be used for
391 // native OS calls.
392 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
393 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
394 static to_platform_string_fn_t _to_platform_string_fn = NULL;
395
396 if (_to_platform_string_fn == NULL) {
397 void *lib_handle = os::native_java_library();
398 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
399 if (_to_platform_string_fn == NULL) {
400 fatal("GetStringPlatformChars missing");
401 }
402 }
403
404 char *native_platform_string;
405 { JavaThread* thread = (JavaThread*)THREAD;
406 assert(thread->is_Java_thread(), "must be java thread");
407 JNIEnv *env = thread->jni_environment();
408 jstring js = (jstring) JNIHandles::make_local(env, java_string());
409 bool is_copy;
410 HandleMark hm(thread);
411 ThreadToNativeFromVM ttn(thread);
412 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
413 assert(is_copy == JNI_TRUE, "is_copy value changed");
414 JNIHandles::destroy_local(js);
415 }
416 return native_platform_string;
417 }
418
419 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
420 oop obj = java_string();
421 // Typical usage is to convert all '/' to '.' in string.
422 typeArrayOop value = java_lang_String::value(obj);
423 int length = java_lang_String::length(obj);
424 bool is_latin1 = java_lang_String::is_latin1(obj);
425
426 // First check if any from_char exist
427 int index; // Declared outside, used later
428 for (index = 0; index < length; index++) {
429 jchar c = !is_latin1 ? value->char_at(index) :
430 ((jchar) value->byte_at(index)) & 0xff;
431 if (c == from_char) {
432 break;
433 }
434 }
435 if (index == length) {
436 // No from_char, so do not copy.
437 return java_string;
438 }
439
440 // Check if result string will be latin1
441 bool to_is_latin1 = false;
442
443 // Replacement char must be latin1
444 if (CompactStrings && UNICODE::is_latin1(to_char)) {
445 if (is_latin1) {
446 // Source string is latin1 as well
447 to_is_latin1 = true;
448 } else if (!UNICODE::is_latin1(from_char)) {
449 // We are replacing an UTF16 char. Scan string to
450 // check if result can be latin1 encoded.
451 to_is_latin1 = true;
452 for (index = 0; index < length; index++) {
453 jchar c = value->char_at(index);
454 if (c != from_char && !UNICODE::is_latin1(c)) {
455 to_is_latin1 = false;
456 break;
457 }
458 }
459 }
460 }
461
462 // Create new UNICODE (or byte) buffer. Must handlize value because GC
463 // may happen during String and char array creation.
464 typeArrayHandle h_value(THREAD, value);
465 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
466 typeArrayOop from_buffer = h_value();
467 typeArrayOop to_buffer = java_lang_String::value(string());
468
469 // Copy contents
470 for (index = 0; index < length; index++) {
471 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
472 ((jchar) from_buffer->byte_at(index)) & 0xff;
473 if (c == from_char) {
474 c = to_char;
475 }
476 if (!to_is_latin1) {
477 to_buffer->char_at_put(index, c);
478 } else {
479 to_buffer->byte_at_put(index, (jbyte) c);
480 }
481 }
482 return string;
483 }
484
485 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
486 typeArrayOop value = java_lang_String::value(java_string);
487 length = java_lang_String::length(java_string);
488 bool is_latin1 = java_lang_String::is_latin1(java_string);
489
490 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
491 if (result != NULL) {
492 if (!is_latin1) {
493 for (int index = 0; index < length; index++) {
494 result[index] = value->char_at(index);
495 }
496 } else {
497 for (int index = 0; index < length; index++) {
498 result[index] = ((jchar) value->byte_at(index)) & 0xff;
499 }
500 }
501 } else {
502 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
503 }
504 return result;
505 }
506
507 unsigned int java_lang_String::hash_code(oop java_string) {
508 int length = java_lang_String::length(java_string);
509 // Zero length string will hash to zero with String.hashCode() function.
510 if (length == 0) return 0;
511
512 typeArrayOop value = java_lang_String::value(java_string);
513 bool is_latin1 = java_lang_String::is_latin1(java_string);
514
515 if (is_latin1) {
516 return java_lang_String::hash_code(value->byte_at_addr(0), length);
517 } else {
518 return java_lang_String::hash_code(value->char_at_addr(0), length);
519 }
520 }
521
522 char* java_lang_String::as_quoted_ascii(oop java_string) {
523 typeArrayOop value = java_lang_String::value(java_string);
524 int length = java_lang_String::length(java_string);
525 bool is_latin1 = java_lang_String::is_latin1(java_string);
526
527 if (length == 0) return NULL;
528
529 char* result;
530 int result_length;
531 if (!is_latin1) {
532 jchar* base = value->char_at_addr(0);
533 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
534 result = NEW_RESOURCE_ARRAY(char, result_length);
535 UNICODE::as_quoted_ascii(base, length, result, result_length);
536 } else {
537 jbyte* base = value->byte_at_addr(0);
538 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
539 result = NEW_RESOURCE_ARRAY(char, result_length);
540 UNICODE::as_quoted_ascii(base, length, result, result_length);
541 }
542 assert(result_length >= length + 1, "must not be shorter");
543 assert(result_length == (int)strlen(result) + 1, "must match");
544 return result;
545 }
546
547 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
548 typeArrayOop value = java_lang_String::value(java_string);
549 int length = java_lang_String::length(java_string);
550 bool is_latin1 = java_lang_String::is_latin1(java_string);
551 if (!is_latin1) {
552 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
553 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
554 return sym;
555 } else {
556 ResourceMark rm;
557 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
558 const char* base = UNICODE::as_utf8(position, length);
559 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
560 return sym;
561 }
562 }
563
564 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
565 typeArrayOop value = java_lang_String::value(java_string);
566 int length = java_lang_String::length(java_string);
567 bool is_latin1 = java_lang_String::is_latin1(java_string);
568 if (!is_latin1) {
569 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
570 return SymbolTable::probe_unicode(base, length);
571 } else {
572 ResourceMark rm;
573 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
574 const char* base = UNICODE::as_utf8(position, length);
575 return SymbolTable::probe(base, length);
576 }
577 }
578
579 int java_lang_String::utf8_length(oop java_string) {
580 typeArrayOop value = java_lang_String::value(java_string);
581 int length = java_lang_String::length(java_string);
582 bool is_latin1 = java_lang_String::is_latin1(java_string);
583 if (length == 0) {
584 return 0;
585 }
586 if (!is_latin1) {
587 return UNICODE::utf8_length(value->char_at_addr(0), length);
588 } else {
589 return UNICODE::utf8_length(value->byte_at_addr(0), length);
590 }
591 }
592
593 char* java_lang_String::as_utf8_string(oop java_string) {
594 typeArrayOop value = java_lang_String::value(java_string);
595 int length = java_lang_String::length(java_string);
596 bool is_latin1 = java_lang_String::is_latin1(java_string);
597 if (!is_latin1) {
598 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
599 return UNICODE::as_utf8(position, length);
600 } else {
601 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
602 return UNICODE::as_utf8(position, length);
603 }
604 }
605
606 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
607 typeArrayOop value = java_lang_String::value(java_string);
608 int length = java_lang_String::length(java_string);
609 bool is_latin1 = java_lang_String::is_latin1(java_string);
610 if (!is_latin1) {
611 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
612 return UNICODE::as_utf8(position, length, buf, buflen);
613 } else {
614 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
615 return UNICODE::as_utf8(position, length, buf, buflen);
616 }
617 }
618
619 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
620 typeArrayOop value = java_lang_String::value(java_string);
621 int length = java_lang_String::length(java_string);
622 assert(start + len <= length, "just checking");
623 bool is_latin1 = java_lang_String::is_latin1(java_string);
624 if (!is_latin1) {
625 jchar* position = value->char_at_addr(start);
626 return UNICODE::as_utf8(position, len);
627 } else {
628 jbyte* position = value->byte_at_addr(start);
629 return UNICODE::as_utf8(position, len);
630 }
631 }
632
633 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
634 typeArrayOop value = java_lang_String::value(java_string);
635 int length = java_lang_String::length(java_string);
636 assert(start + len <= length, "just checking");
637 bool is_latin1 = java_lang_String::is_latin1(java_string);
638 if (!is_latin1) {
639 jchar* position = value->char_at_addr(start);
640 return UNICODE::as_utf8(position, len, buf, buflen);
641 } else {
642 jbyte* position = value->byte_at_addr(start);
643 return UNICODE::as_utf8(position, len, buf, buflen);
644 }
645 }
646
647 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
648 assert(java_string->klass() == SystemDictionary::String_klass(),
649 "must be java_string");
650 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
651 int length = java_lang_String::length(java_string);
652 if (length != len) {
653 return false;
654 }
655 bool is_latin1 = java_lang_String::is_latin1(java_string);
656 if (!is_latin1) {
657 for (int i = 0; i < len; i++) {
658 if (value->char_at(i) != chars[i]) {
659 return false;
660 }
661 }
662 } else {
663 for (int i = 0; i < len; i++) {
664 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
665 return false;
666 }
667 }
668 }
669 return true;
670 }
671
672 bool java_lang_String::equals(oop str1, oop str2) {
673 assert(str1->klass() == SystemDictionary::String_klass(),
674 "must be java String");
675 assert(str2->klass() == SystemDictionary::String_klass(),
676 "must be java String");
677 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
678 int length1 = java_lang_String::length(str1);
679 bool is_latin1 = java_lang_String::is_latin1(str1);
680 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
681 int length2 = java_lang_String::length(str2);
682 bool is_latin2 = java_lang_String::is_latin1(str2);
683
684 if ((length1 != length2) || (is_latin1 != is_latin2)) {
685 // Strings of different size or with different
686 // coders are never equal.
687 return false;
688 }
689 int blength1 = value1->length();
690 for (int i = 0; i < blength1; i++) {
691 if (value1->byte_at(i) != value2->byte_at(i)) {
692 return false;
693 }
694 }
695 return true;
696 }
697
698 void java_lang_String::print(oop java_string, outputStream* st) {
699 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
700 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
701
702 if (value == NULL) {
703 // This can happen if, e.g., printing a String
704 // object before its initializer has been called
705 st->print("NULL");
706 return;
707 }
708
709 int length = java_lang_String::length(java_string);
710 bool is_latin1 = java_lang_String::is_latin1(java_string);
711
712 st->print("\"");
713 for (int index = 0; index < length; index++) {
714 st->print("%c", (!is_latin1) ? value->char_at(index) :
715 ((jchar) value->byte_at(index)) & 0xff );
716 }
717 st->print("\"");
718 }
719
720
721 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
722 assert(mirror.not_null() && fd->is_static(), "just checking");
723 if (fd->has_initial_value()) {
724 BasicType t = fd->field_type();
725 switch (t) {
726 case T_BYTE:
727 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
728 break;
729 case T_BOOLEAN:
730 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
731 break;
732 case T_CHAR:
733 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
734 break;
735 case T_SHORT:
736 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
737 break;
738 case T_INT:
739 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
740 break;
741 case T_FLOAT:
742 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
743 break;
744 case T_DOUBLE:
745 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
746 break;
747 case T_LONG:
748 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
749 break;
750 case T_OBJECT:
751 {
752 assert(fd->signature() == vmSymbols::string_signature(),
753 "just checking");
754 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
755 // Archive the String field and update the pointer.
756 oop s = mirror()->obj_field(fd->offset());
757 oop archived_s = StringTable::create_archived_string(s, CHECK);
758 mirror()->obj_field_put(fd->offset(), archived_s);
759 } else {
760 oop string = fd->string_initial_value(CHECK);
761 mirror()->obj_field_put(fd->offset(), string);
762 }
763 }
764 break;
765 default:
766 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
767 "Illegal ConstantValue attribute in class file");
768 }
769 }
770 }
771
772
773 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
774 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
775
776 // If the offset was read from the shared archive, it was fixed up already
777 if (!k->is_shared()) {
778 if (k->is_instance_klass()) {
779 // During bootstrap, java.lang.Class wasn't loaded so static field
780 // offsets were computed without the size added it. Go back and
781 // update all the static field offsets to included the size.
782 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
783 if (fs.access_flags().is_static()) {
784 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
785 fs.set_offset(real_offset);
786 }
787 }
788 }
789 }
790
791 if (k->is_shared() && k->has_raw_archived_mirror()) {
792 if (HeapShared::open_archive_heap_region_mapped()) {
793 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
794 assert(present, "Missing archived mirror for %s", k->external_name());
795 return;
796 } else {
797 k->set_java_mirror_handle(NULL);
798 k->clear_has_raw_archived_mirror();
799 }
800 }
801 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
802 }
803
804 void java_lang_Class::initialize_mirror_fields(Klass* k,
805 Handle mirror,
806 Handle protection_domain,
807 TRAPS) {
808 // Allocate a simple java object for a lock.
809 // This needs to be a java object because during class initialization
810 // it can be held across a java call.
811 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
812 set_init_lock(mirror(), r);
813
814 // Set protection domain also
815 set_protection_domain(mirror(), protection_domain());
816
817 // Initialize static fields
818 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
819 }
820
821 // Set the java.lang.Module module field in the java_lang_Class mirror
822 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
823 if (module.is_null()) {
824 // During startup, the module may be NULL only if java.base has not been defined yet.
825 // Put the class on the fixup_module_list to patch later when the java.lang.Module
826 // for java.base is known.
827 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization");
828
829 bool javabase_was_defined = false;
830 {
831 MutexLocker m1(Module_lock, THREAD);
832 // Keep list of classes needing java.base module fixup
833 if (!ModuleEntryTable::javabase_defined()) {
834 assert(k->java_mirror() != NULL, "Class's mirror is null");
835 k->class_loader_data()->inc_keep_alive();
836 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
837 fixup_module_field_list()->push(k);
838 } else {
839 javabase_was_defined = true;
840 }
841 }
842
843 // If java.base was already defined then patch this particular class with java.base.
844 if (javabase_was_defined) {
845 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
846 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
847 "Setting class module field, " JAVA_BASE_NAME " should be defined");
848 Handle javabase_handle(THREAD, javabase_entry->module());
849 set_module(mirror(), javabase_handle());
850 }
851 } else {
852 assert(Universe::is_module_initialized() ||
853 (ModuleEntryTable::javabase_defined() &&
854 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
855 "Incorrect java.lang.Module specification while creating mirror");
856 set_module(mirror(), module());
857 }
858 }
859
860 // Statically allocate fixup lists because they always get created.
861 void java_lang_Class::allocate_fixup_lists() {
862 GrowableArray<Klass*>* mirror_list =
863 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
864 set_fixup_mirror_list(mirror_list);
865
866 GrowableArray<Klass*>* module_list =
867 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
868 set_fixup_module_field_list(module_list);
869 }
870
871 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
872 Handle module, Handle protection_domain, TRAPS) {
873 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
874 assert(k->java_mirror() == NULL, "should only assign mirror once");
875
876 // Use this moment of initialization to cache modifier_flags also,
877 // to support Class.getModifiers(). Instance classes recalculate
878 // the cached flags after the class file is parsed, but before the
879 // class is put into the system dictionary.
880 int computed_modifiers = k->compute_modifier_flags(CHECK);
881 k->set_modifier_flags(computed_modifiers);
882 // Class_klass has to be loaded because it is used to allocate
883 // the mirror.
884 if (SystemDictionary::Class_klass_loaded()) {
885 // Allocate mirror (java.lang.Class instance)
886 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
887 Handle mirror(THREAD, mirror_oop);
888 Handle comp_mirror;
889
890 // Setup indirection from mirror->klass
891 java_lang_Class::set_klass(mirror(), k);
892
893 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
894 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
895
896 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
897
898 // It might also have a component mirror. This mirror must already exist.
899 if (k->is_array_klass()) {
900 if (k->is_typeArray_klass()) {
901 BasicType type = TypeArrayKlass::cast(k)->element_type();
902 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
903 } else {
904 assert(k->is_objArray_klass(), "Must be");
905 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
906 assert(element_klass != NULL, "Must have an element klass");
907 comp_mirror = Handle(THREAD, element_klass->java_mirror());
908 }
909 assert(comp_mirror() != NULL, "must have a mirror");
910
911 // Two-way link between the array klass and its component mirror:
912 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
913 set_component_mirror(mirror(), comp_mirror());
914 // See below for ordering dependencies between field array_klass in component mirror
915 // and java_mirror in this klass.
916 } else {
917 assert(k->is_instance_klass(), "Must be");
918
919 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
920 if (HAS_PENDING_EXCEPTION) {
921 // If any of the fields throws an exception like OOM remove the klass field
922 // from the mirror so GC doesn't follow it after the klass has been deallocated.
923 // This mirror looks like a primitive type, which logically it is because it
924 // it represents no class.
925 java_lang_Class::set_klass(mirror(), NULL);
926 return;
927 }
928 }
929
930 // set the classLoader field in the java_lang_Class instance
931 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
932 set_class_loader(mirror(), class_loader());
933
934 // Setup indirection from klass->mirror
935 // after any exceptions can happen during allocations.
936 k->set_java_mirror(mirror);
937
938 // Set the module field in the java_lang_Class instance. This must be done
939 // after the mirror is set.
940 set_mirror_module_field(k, mirror, module, THREAD);
941
942 if (comp_mirror() != NULL) {
943 // Set after k->java_mirror() is published, because compiled code running
944 // concurrently doesn't expect a k to have a null java_mirror.
945 release_set_array_klass(comp_mirror(), k);
946 }
947 } else {
948 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
949 fixup_mirror_list()->push(k);
950 }
951 }
952
953 #if INCLUDE_CDS_JAVA_HEAP
954 // Clears mirror fields. Static final fields with initial values are reloaded
955 // from constant pool. The object identity hash is in the object header and is
956 // not affected.
957 class ResetMirrorField: public FieldClosure {
958 private:
959 Handle _m;
960
961 public:
962 ResetMirrorField(Handle mirror) : _m(mirror) {}
963
964 void do_field(fieldDescriptor* fd) {
965 assert(DumpSharedSpaces, "dump time only");
966 assert(_m.not_null(), "Mirror cannot be NULL");
967
968 if (fd->is_static() && fd->has_initial_value()) {
969 initialize_static_field(fd, _m, Thread::current());
970 return;
971 }
972
973 BasicType ft = fd->field_type();
974 switch (ft) {
975 case T_BYTE:
976 _m()->byte_field_put(fd->offset(), 0);
977 break;
978 case T_CHAR:
979 _m()->char_field_put(fd->offset(), 0);
980 break;
981 case T_DOUBLE:
982 _m()->double_field_put(fd->offset(), 0);
983 break;
984 case T_FLOAT:
985 _m()->float_field_put(fd->offset(), 0);
986 break;
987 case T_INT:
988 _m()->int_field_put(fd->offset(), 0);
989 break;
990 case T_LONG:
991 _m()->long_field_put(fd->offset(), 0);
992 break;
993 case T_SHORT:
994 _m()->short_field_put(fd->offset(), 0);
995 break;
996 case T_BOOLEAN:
997 _m()->bool_field_put(fd->offset(), false);
998 break;
999 case T_ARRAY:
1000 case T_OBJECT: {
1001 // It might be useful to cache the String field, but
1002 // for now just clear out any reference field
1003 oop o = _m()->obj_field(fd->offset());
1004 _m()->obj_field_put(fd->offset(), NULL);
1005 break;
1006 }
1007 default:
1008 ShouldNotReachHere();
1009 break;
1010 }
1011 }
1012 };
1013
1014 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1015 assert(HeapShared::is_heap_object_archiving_allowed(),
1016 "HeapShared::is_heap_object_archiving_allowed() must be true");
1017
1018 for (int t = 0; t <= T_VOID; t++) {
1019 oop m = Universe::_mirrors[t];
1020 if (m != NULL) {
1021 // Update the field at _array_klass_offset to point to the relocated array klass.
1022 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1023 assert(archived_m != NULL, "sanity");
1024 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1025 assert(ak != NULL || t == T_VOID, "should not be NULL");
1026 if (ak != NULL) {
1027 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1028 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1029 }
1030
1031 // Clear the fields. Just to be safe
1032 Klass *k = m->klass();
1033 Handle archived_mirror_h(THREAD, archived_m);
1034 ResetMirrorField reset(archived_mirror_h);
1035 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1036
1037 log_trace(cds, heap, mirror)(
1038 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1039 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1040
1041 Universe::_mirrors[t] = archived_m;
1042 }
1043 }
1044
1045 assert(Universe::_mirrors[T_INT] != NULL &&
1046 Universe::_mirrors[T_FLOAT] != NULL &&
1047 Universe::_mirrors[T_DOUBLE] != NULL &&
1048 Universe::_mirrors[T_BYTE] != NULL &&
1049 Universe::_mirrors[T_BOOLEAN] != NULL &&
1050 Universe::_mirrors[T_CHAR] != NULL &&
1051 Universe::_mirrors[T_LONG] != NULL &&
1052 Universe::_mirrors[T_SHORT] != NULL &&
1053 Universe::_mirrors[T_VOID] != NULL, "sanity");
1054
1055 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1056 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1057 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1058 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1059 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1060 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1061 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1062 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1063 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1064 }
1065
1066 //
1067 // After the mirror object is successfully archived, the archived
1068 // klass is set with _has_archived_raw_mirror flag.
1069 //
1070 // The _has_archived_raw_mirror flag is cleared at runtime when the
1071 // archived mirror is restored. If archived java heap data cannot
1072 // be used at runtime, new mirror object is created for the shared
1073 // class. The _has_archived_raw_mirror is cleared also during the process.
1074 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1075 assert(HeapShared::is_heap_object_archiving_allowed(),
1076 "HeapShared::is_heap_object_archiving_allowed() must be true");
1077
1078 // Mirror is already archived
1079 if (k->has_raw_archived_mirror()) {
1080 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1081 return k->archived_java_mirror_raw();
1082 }
1083
1084 // No mirror
1085 oop mirror = k->java_mirror();
1086 if (mirror == NULL) {
1087 return NULL;
1088 }
1089
1090 if (k->is_instance_klass()) {
1091 InstanceKlass *ik = InstanceKlass::cast(k);
1092 assert(ik->signers() == NULL && !k->has_signer_and_not_archived(),
1093 "class with signer cannot be supported");
1094
1095 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1096 ik->is_shared_app_class())) {
1097 // Archiving mirror for classes from non-builtin loaders is not
1098 // supported. Clear the _java_mirror within the archived class.
1099 k->set_java_mirror_handle(NULL);
1100 return NULL;
1101 }
1102 }
1103
1104 // Now start archiving the mirror object
1105 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1106 if (archived_mirror == NULL) {
1107 return NULL;
1108 }
1109
1110 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1111 if (archived_mirror == NULL) {
1112 return NULL;
1113 }
1114
1115 k->set_archived_java_mirror_raw(archived_mirror);
1116
1117 k->set_has_raw_archived_mirror();
1118
1119 ResourceMark rm;
1120 log_trace(cds, heap, mirror)(
1121 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1122 k->external_name(), p2i(mirror), p2i(archived_mirror));
1123
1124 return archived_mirror;
1125 }
1126
1127 // The process is based on create_mirror().
1128 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1129 oop archived_mirror,
1130 Thread *THREAD) {
1131 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1132 // to archived metadata and objects below.
1133 Klass *c = archived_mirror->klass();
1134 Handle archived_mirror_h(THREAD, archived_mirror);
1135 ResetMirrorField reset(archived_mirror_h);
1136 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1137
1138 if (k->is_array_klass()) {
1139 oop archived_comp_mirror;
1140 if (k->is_typeArray_klass()) {
1141 // The primitive type mirrors are already archived. Get the archived mirror.
1142 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1143 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1144 assert(archived_comp_mirror != NULL, "Must be");
1145 } else {
1146 assert(k->is_objArray_klass(), "Must be");
1147 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1148 assert(element_klass != NULL, "Must have an element klass");
1149 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1150 if (archived_comp_mirror == NULL) {
1151 return NULL;
1152 }
1153 }
1154 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1155 } else {
1156 assert(k->is_instance_klass(), "Must be");
1157
1158 // Reset local static fields in the mirror
1159 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1160
1161 java_lang_Class:set_init_lock(archived_mirror, NULL);
1162
1163 set_protection_domain(archived_mirror, NULL);
1164 }
1165
1166 // clear class loader and mirror_module_field
1167 set_class_loader(archived_mirror, NULL);
1168 set_module(archived_mirror, NULL);
1169
1170 // The archived mirror's field at _klass_offset is still pointing to the original
1171 // klass. Updated the field in the archived mirror to point to the relocated
1172 // klass in the archive.
1173 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1174 log_debug(cds, heap, mirror)(
1175 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1176 p2i(as_Klass(mirror)), p2i(reloc_k));
1177 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1178
1179 // The field at _array_klass_offset is pointing to the original one dimension
1180 // higher array klass if exists. Relocate the pointer.
1181 Klass *arr = array_klass_acquire(mirror);
1182 if (arr != NULL) {
1183 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1184 log_debug(cds, heap, mirror)(
1185 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1186 p2i(arr), p2i(reloc_arr));
1187 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1188 }
1189 return archived_mirror;
1190 }
1191
1192 // Returns true if the mirror is updated, false if no archived mirror
1193 // data is present. After the archived mirror object is restored, the
1194 // shared klass' _has_raw_archived_mirror flag is cleared.
1195 bool java_lang_Class::restore_archived_mirror(Klass *k,
1196 Handle class_loader, Handle module,
1197 Handle protection_domain, TRAPS) {
1198 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1199 // see more details in SystemDictionary::resolve_preloaded_classes().
1200 if (!SystemDictionary::Class_klass_loaded()) {
1201 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1202 fixup_mirror_list()->push(k);
1203 return true;
1204 }
1205
1206 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1207
1208 if (m == NULL) {
1209 return false;
1210 }
1211
1212 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1213
1214 // mirror is archived, restore
1215 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1216 Handle mirror(THREAD, m);
1217
1218 if (!k->is_array_klass()) {
1219 // - local static final fields with initial values were initialized at dump time
1220
1221 // create the init_lock
1222 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1223 set_init_lock(mirror(), r);
1224
1225 if (protection_domain.not_null()) {
1226 set_protection_domain(mirror(), protection_domain());
1227 }
1228 }
1229
1230 assert(class_loader() == k->class_loader(), "should be same");
1231 if (class_loader.not_null()) {
1232 set_class_loader(mirror(), class_loader());
1233 }
1234
1235 k->set_java_mirror(mirror);
1236 k->clear_has_raw_archived_mirror();
1237
1238 set_mirror_module_field(k, mirror, module, THREAD);
1239
1240 ResourceMark rm;
1241 log_trace(cds, heap, mirror)(
1242 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1243
1244 return true;
1245 }
1246 #endif // INCLUDE_CDS_JAVA_HEAP
1247
1248 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1249 assert(_module_offset != 0, "must have been computed already");
1250 java_lang_Class::set_module(k->java_mirror(), module());
1251 }
1252
1253 int java_lang_Class::oop_size(oop java_class) {
1254 assert(_oop_size_offset != 0, "must be set");
1255 int size = java_class->int_field(_oop_size_offset);
1256 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1257 return size;
1258 }
1259
1260 int java_lang_Class::oop_size_raw(oop java_class) {
1261 assert(_oop_size_offset != 0, "must be set");
1262 int size = java_class->int_field_raw(_oop_size_offset);
1263 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1264 return size;
1265 }
1266
1267 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1268 assert(_oop_size_offset != 0, "must be set");
1269 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1270 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1271 }
1272
1273 int java_lang_Class::static_oop_field_count(oop java_class) {
1274 assert(_static_oop_field_count_offset != 0, "must be set");
1275 return java_class->int_field(_static_oop_field_count_offset);
1276 }
1277
1278 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1279 assert(_static_oop_field_count_offset != 0, "must be set");
1280 return java_class->int_field_raw(_static_oop_field_count_offset);
1281 }
1282
1283 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1284 assert(_static_oop_field_count_offset != 0, "must be set");
1285 java_class->int_field_put(_static_oop_field_count_offset, size);
1286 }
1287
1288 oop java_lang_Class::protection_domain(oop java_class) {
1289 assert(_protection_domain_offset != 0, "must be set");
1290 return java_class->obj_field(_protection_domain_offset);
1291 }
1292 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1293 assert(_protection_domain_offset != 0, "must be set");
1294 java_class->obj_field_put(_protection_domain_offset, pd);
1295 }
1296
1297 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1298 assert(_component_mirror_offset != 0, "must be set");
1299 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1300 }
1301 oop java_lang_Class::component_mirror(oop java_class) {
1302 assert(_component_mirror_offset != 0, "must be set");
1303 return java_class->obj_field(_component_mirror_offset);
1304 }
1305
1306 oop java_lang_Class::init_lock(oop java_class) {
1307 assert(_init_lock_offset != 0, "must be set");
1308 return java_class->obj_field(_init_lock_offset);
1309 }
1310 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1311 assert(_init_lock_offset != 0, "must be set");
1312 java_class->obj_field_put(_init_lock_offset, init_lock);
1313 }
1314
1315 objArrayOop java_lang_Class::signers(oop java_class) {
1316 assert(_signers_offset != 0, "must be set");
1317 return (objArrayOop)java_class->obj_field(_signers_offset);
1318 }
1319 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1320 assert(_signers_offset != 0, "must be set");
1321 java_class->obj_field_put(_signers_offset, (oop)signers);
1322 }
1323
1324
1325 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1326 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1327 if (_class_loader_offset != 0) {
1328 java_class->obj_field_put(_class_loader_offset, loader);
1329 }
1330 }
1331
1332 oop java_lang_Class::class_loader(oop java_class) {
1333 assert(_class_loader_offset != 0, "must be set");
1334 return java_class->obj_field(_class_loader_offset);
1335 }
1336
1337 oop java_lang_Class::module(oop java_class) {
1338 assert(_module_offset != 0, "must be set");
1339 return java_class->obj_field(_module_offset);
1340 }
1341
1342 void java_lang_Class::set_module(oop java_class, oop module) {
1343 assert(_module_offset != 0, "must be set");
1344 java_class->obj_field_put(_module_offset, module);
1345 }
1346
1347 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1348 // This should be improved by adding a field at the Java level or by
1349 // introducing a new VM klass (see comment in ClassFileParser)
1350 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1351 if (type != T_VOID) {
1352 Klass* aklass = Universe::typeArrayKlassObj(type);
1353 assert(aklass != NULL, "correct bootstrap");
1354 release_set_array_klass(java_class, aklass);
1355 }
1356 #ifdef ASSERT
1357 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1358 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1359 #endif
1360 return java_class;
1361 }
1362
1363
1364 Klass* java_lang_Class::as_Klass(oop java_class) {
1365 //%note memory_2
1366 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1367 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1368 assert(k == NULL || k->is_klass(), "type check");
1369 return k;
1370 }
1371
1372 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1373 //%note memory_2
1374 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1375 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1376 assert(k == NULL || k->is_klass(), "type check");
1377 return k;
1378 }
1379
1380
1381 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1382 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1383 java_class->metadata_field_put(_klass_offset, klass);
1384 }
1385
1386
1387 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1388 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1389 Symbol* name = NULL;
1390 bool is_instance = false;
1391 if (is_primitive(java_class)) {
1392 name = vmSymbols::type_signature(primitive_type(java_class));
1393 } else {
1394 Klass* k = as_Klass(java_class);
1395 is_instance = k->is_instance_klass();
1396 name = k->name();
1397 }
1398 if (name == NULL) {
1399 st->print("<null>");
1400 return;
1401 }
1402 if (is_instance) st->print("L");
1403 st->write((char*) name->base(), (int) name->utf8_length());
1404 if (is_instance) st->print(";");
1405 }
1406
1407 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1408 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1409 Symbol* name;
1410 if (is_primitive(java_class)) {
1411 name = vmSymbols::type_signature(primitive_type(java_class));
1412 // Because this can create a new symbol, the caller has to decrement
1413 // the refcount, so make adjustment here and below for symbols returned
1414 // that are not created or incremented due to a successful lookup.
1415 name->increment_refcount();
1416 } else {
1417 Klass* k = as_Klass(java_class);
1418 if (!k->is_instance_klass()) {
1419 name = k->name();
1420 name->increment_refcount();
1421 } else {
1422 ResourceMark rm;
1423 const char* sigstr = k->signature_name();
1424 int siglen = (int) strlen(sigstr);
1425 if (!intern_if_not_found) {
1426 name = SymbolTable::probe(sigstr, siglen);
1427 } else {
1428 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1429 }
1430 }
1431 }
1432 return name;
1433 }
1434
1435 // Returns the Java name for this Java mirror (Resource allocated)
1436 // See Klass::external_name().
1437 // For primitive type Java mirrors, its type name is returned.
1438 const char* java_lang_Class::as_external_name(oop java_class) {
1439 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1440 const char* name = NULL;
1441 if (is_primitive(java_class)) {
1442 name = type2name(primitive_type(java_class));
1443 } else {
1444 name = as_Klass(java_class)->external_name();
1445 }
1446 if (name == NULL) {
1447 name = "<null>";
1448 }
1449 return name;
1450 }
1451
1452 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1453 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1454 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1455 return k;
1456 }
1457
1458
1459 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1460 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1461 java_class->release_metadata_field_put(_array_klass_offset, klass);
1462 }
1463
1464
1465 bool java_lang_Class::is_primitive(oop java_class) {
1466 // should assert:
1467 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1468 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1469
1470 #ifdef ASSERT
1471 if (is_primitive) {
1472 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1473 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1474 "Should be either the T_VOID primitive or a java primitive");
1475 }
1476 #endif
1477
1478 return is_primitive;
1479 }
1480
1481
1482 BasicType java_lang_Class::primitive_type(oop java_class) {
1483 assert(java_lang_Class::is_primitive(java_class), "just checking");
1484 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1485 BasicType type = T_VOID;
1486 if (ak != NULL) {
1487 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1488 type = ArrayKlass::cast(ak)->element_type();
1489 } else {
1490 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1491 }
1492 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1493 return type;
1494 }
1495
1496 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1497 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1498 if (is_primitive(java_class)) {
1499 if (reference_klass != NULL)
1500 (*reference_klass) = NULL;
1501 return primitive_type(java_class);
1502 } else {
1503 if (reference_klass != NULL)
1504 (*reference_klass) = as_Klass(java_class);
1505 return T_OBJECT;
1506 }
1507 }
1508
1509
1510 oop java_lang_Class::primitive_mirror(BasicType t) {
1511 oop mirror = Universe::java_mirror(t);
1512 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1513 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1514 return mirror;
1515 }
1516
1517 bool java_lang_Class::offsets_computed = false;
1518 int java_lang_Class::classRedefinedCount_offset = -1;
1519
1520 #define CLASS_FIELDS_DO(macro) \
1521 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1522 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1523 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1524 macro(_module_offset, k, "module", module_signature, false)
1525
1526 void java_lang_Class::compute_offsets() {
1527 if (offsets_computed) {
1528 return;
1529 }
1530
1531 offsets_computed = true;
1532
1533 InstanceKlass* k = SystemDictionary::Class_klass();
1534 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1535
1536 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1537 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1538 // GC treats them the same.
1539 _init_lock_offset = _component_mirror_offset;
1540
1541 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1542 }
1543
1544 #if INCLUDE_CDS
1545 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1546 f->do_u4((u4*)&offsets_computed);
1547 f->do_u4((u4*)&_init_lock_offset);
1548
1549 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1550
1551 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1552 }
1553 #endif
1554
1555 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1556 if (classRedefinedCount_offset == -1) {
1557 // If we don't have an offset for it then just return -1 as a marker.
1558 return -1;
1559 }
1560
1561 return the_class_mirror->int_field(classRedefinedCount_offset);
1562 }
1563
1564 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1565 if (classRedefinedCount_offset == -1) {
1566 // If we don't have an offset for it then nothing to set.
1567 return;
1568 }
1569
1570 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1571 }
1572
1573
1574 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1575 // platform thread structure, and a eetop offset which was used for thread
1576 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1577 // merged, so in the HotSpot VM we just use the eetop field for the thread
1578 // instead of the privateInfo_offset.
1579 //
1580 // Note: The stackSize field is only present starting in 1.4.
1581
1582 int java_lang_Thread::_name_offset = 0;
1583 int java_lang_Thread::_group_offset = 0;
1584 int java_lang_Thread::_contextClassLoader_offset = 0;
1585 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1586 int java_lang_Thread::_priority_offset = 0;
1587 int java_lang_Thread::_eetop_offset = 0;
1588 int java_lang_Thread::_daemon_offset = 0;
1589 int java_lang_Thread::_stillborn_offset = 0;
1590 int java_lang_Thread::_stackSize_offset = 0;
1591 int java_lang_Thread::_tid_offset = 0;
1592 int java_lang_Thread::_thread_status_offset = 0;
1593 int java_lang_Thread::_park_blocker_offset = 0;
1594 int java_lang_Thread::_park_event_offset = 0 ;
1595
1596 #define THREAD_FIELDS_DO(macro) \
1597 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1598 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1599 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1600 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1601 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1602 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1603 macro(_eetop_offset, k, "eetop", long_signature, false); \
1604 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1605 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1606 macro(_tid_offset, k, "tid", long_signature, false); \
1607 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1608 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1609 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1610
1611 void java_lang_Thread::compute_offsets() {
1612 assert(_group_offset == 0, "offsets should be initialized only once");
1613
1614 InstanceKlass* k = SystemDictionary::Thread_klass();
1615 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1616 }
1617
1618 #if INCLUDE_CDS
1619 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1620 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1621 }
1622 #endif
1623
1624 JavaThread* java_lang_Thread::thread(oop java_thread) {
1625 return (JavaThread*)java_thread->address_field(_eetop_offset);
1626 }
1627
1628
1629 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1630 java_thread->address_field_put(_eetop_offset, (address)thread);
1631 }
1632
1633
1634 oop java_lang_Thread::name(oop java_thread) {
1635 return java_thread->obj_field(_name_offset);
1636 }
1637
1638
1639 void java_lang_Thread::set_name(oop java_thread, oop name) {
1640 java_thread->obj_field_put(_name_offset, name);
1641 }
1642
1643
1644 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1645 return (ThreadPriority)java_thread->int_field(_priority_offset);
1646 }
1647
1648
1649 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1650 java_thread->int_field_put(_priority_offset, priority);
1651 }
1652
1653
1654 oop java_lang_Thread::threadGroup(oop java_thread) {
1655 return java_thread->obj_field(_group_offset);
1656 }
1657
1658
1659 bool java_lang_Thread::is_stillborn(oop java_thread) {
1660 return java_thread->bool_field(_stillborn_offset) != 0;
1661 }
1662
1663
1664 // We never have reason to turn the stillborn bit off
1665 void java_lang_Thread::set_stillborn(oop java_thread) {
1666 java_thread->bool_field_put(_stillborn_offset, true);
1667 }
1668
1669
1670 bool java_lang_Thread::is_alive(oop java_thread) {
1671 JavaThread* thr = java_lang_Thread::thread(java_thread);
1672 return (thr != NULL);
1673 }
1674
1675
1676 bool java_lang_Thread::is_daemon(oop java_thread) {
1677 return java_thread->bool_field(_daemon_offset) != 0;
1678 }
1679
1680
1681 void java_lang_Thread::set_daemon(oop java_thread) {
1682 java_thread->bool_field_put(_daemon_offset, true);
1683 }
1684
1685 oop java_lang_Thread::context_class_loader(oop java_thread) {
1686 return java_thread->obj_field(_contextClassLoader_offset);
1687 }
1688
1689 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1690 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1691 }
1692
1693
1694 jlong java_lang_Thread::stackSize(oop java_thread) {
1695 if (_stackSize_offset > 0) {
1696 return java_thread->long_field(_stackSize_offset);
1697 } else {
1698 return 0;
1699 }
1700 }
1701
1702 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1703 void java_lang_Thread::set_thread_status(oop java_thread,
1704 java_lang_Thread::ThreadStatus status) {
1705 // The threadStatus is only present starting in 1.5
1706 if (_thread_status_offset > 0) {
1707 java_thread->int_field_put(_thread_status_offset, status);
1708 }
1709 }
1710
1711 // Read thread status value from threadStatus field in java.lang.Thread java class.
1712 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1713 // Make sure the caller is operating on behalf of the VM or is
1714 // running VM code (state == _thread_in_vm).
1715 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1716 JavaThread::current()->thread_state() == _thread_in_vm,
1717 "Java Thread is not running in vm");
1718 // The threadStatus is only present starting in 1.5
1719 if (_thread_status_offset > 0) {
1720 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1721 } else {
1722 // All we can easily figure out is if it is alive, but that is
1723 // enough info for a valid unknown status.
1724 // These aren't restricted to valid set ThreadStatus values, so
1725 // use JVMTI values and cast.
1726 JavaThread* thr = java_lang_Thread::thread(java_thread);
1727 if (thr == NULL) {
1728 // the thread hasn't run yet or is in the process of exiting
1729 return NEW;
1730 }
1731 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1732 }
1733 }
1734
1735
1736 jlong java_lang_Thread::thread_id(oop java_thread) {
1737 // The thread ID field is only present starting in 1.5
1738 if (_tid_offset > 0) {
1739 return java_thread->long_field(_tid_offset);
1740 } else {
1741 return 0;
1742 }
1743 }
1744
1745 oop java_lang_Thread::park_blocker(oop java_thread) {
1746 assert(JDK_Version::current().supports_thread_park_blocker() &&
1747 _park_blocker_offset != 0, "Must support parkBlocker field");
1748
1749 if (_park_blocker_offset > 0) {
1750 return java_thread->obj_field(_park_blocker_offset);
1751 }
1752
1753 return NULL;
1754 }
1755
1756 jlong java_lang_Thread::park_event(oop java_thread) {
1757 if (_park_event_offset > 0) {
1758 return java_thread->long_field(_park_event_offset);
1759 }
1760 return 0;
1761 }
1762
1763 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1764 if (_park_event_offset > 0) {
1765 java_thread->long_field_put(_park_event_offset, ptr);
1766 return true;
1767 }
1768 return false;
1769 }
1770
1771
1772 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1773 assert(_thread_status_offset != 0, "Must have thread status");
1774 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1775 switch (status) {
1776 case NEW : return "NEW";
1777 case RUNNABLE : return "RUNNABLE";
1778 case SLEEPING : return "TIMED_WAITING (sleeping)";
1779 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1780 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1781 case PARKED : return "WAITING (parking)";
1782 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1783 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1784 case TERMINATED : return "TERMINATED";
1785 default : return "UNKNOWN";
1786 };
1787 }
1788 int java_lang_ThreadGroup::_parent_offset = 0;
1789 int java_lang_ThreadGroup::_name_offset = 0;
1790 int java_lang_ThreadGroup::_threads_offset = 0;
1791 int java_lang_ThreadGroup::_groups_offset = 0;
1792 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1793 int java_lang_ThreadGroup::_destroyed_offset = 0;
1794 int java_lang_ThreadGroup::_daemon_offset = 0;
1795 int java_lang_ThreadGroup::_nthreads_offset = 0;
1796 int java_lang_ThreadGroup::_ngroups_offset = 0;
1797
1798 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1799 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1800 return java_thread_group->obj_field(_parent_offset);
1801 }
1802
1803 // ("name as oop" accessor is not necessary)
1804
1805 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1806 oop name = java_thread_group->obj_field(_name_offset);
1807 // ThreadGroup.name can be null
1808 if (name != NULL) {
1809 return java_lang_String::as_utf8_string(name);
1810 }
1811 return NULL;
1812 }
1813
1814 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1815 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1816 return java_thread_group->int_field(_nthreads_offset);
1817 }
1818
1819 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1820 oop threads = java_thread_group->obj_field(_threads_offset);
1821 assert(threads != NULL, "threadgroups should have threads");
1822 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1823 return objArrayOop(threads);
1824 }
1825
1826 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1827 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1828 return java_thread_group->int_field(_ngroups_offset);
1829 }
1830
1831 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1832 oop groups = java_thread_group->obj_field(_groups_offset);
1833 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1834 return objArrayOop(groups);
1835 }
1836
1837 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1838 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1839 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1840 }
1841
1842 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1843 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1844 return java_thread_group->bool_field(_destroyed_offset) != 0;
1845 }
1846
1847 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1848 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1849 return java_thread_group->bool_field(_daemon_offset) != 0;
1850 }
1851
1852 #define THREADGROUP_FIELDS_DO(macro) \
1853 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1854 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1855 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1856 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1857 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1858 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1859 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1860 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1861 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1862
1863 void java_lang_ThreadGroup::compute_offsets() {
1864 assert(_parent_offset == 0, "offsets should be initialized only once");
1865
1866 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1867 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1868 }
1869
1870 #if INCLUDE_CDS
1871 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1872 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1873 }
1874 #endif
1875
1876 #define THROWABLE_FIELDS_DO(macro) \
1877 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1878 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1879 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1880 macro(depth_offset, k, "depth", int_signature, false); \
1881 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1882
1883 void java_lang_Throwable::compute_offsets() {
1884 InstanceKlass* k = SystemDictionary::Throwable_klass();
1885 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1886 }
1887
1888 #if INCLUDE_CDS
1889 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1890 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1891 }
1892 #endif
1893
1894 oop java_lang_Throwable::unassigned_stacktrace() {
1895 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1896 oop base = ik->static_field_base_raw();
1897 return base->obj_field(static_unassigned_stacktrace_offset);
1898 }
1899
1900 oop java_lang_Throwable::backtrace(oop throwable) {
1901 return throwable->obj_field_acquire(backtrace_offset);
1902 }
1903
1904
1905 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1906 throwable->release_obj_field_put(backtrace_offset, value);
1907 }
1908
1909 int java_lang_Throwable::depth(oop throwable) {
1910 return throwable->int_field(depth_offset);
1911 }
1912
1913 void java_lang_Throwable::set_depth(oop throwable, int value) {
1914 throwable->int_field_put(depth_offset, value);
1915 }
1916
1917 oop java_lang_Throwable::message(oop throwable) {
1918 return throwable->obj_field(detailMessage_offset);
1919 }
1920
1921
1922 // Return Symbol for detailed_message or NULL
1923 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1924 PRESERVE_EXCEPTION_MARK; // Keep original exception
1925 oop detailed_message = java_lang_Throwable::message(throwable);
1926 if (detailed_message != NULL) {
1927 return java_lang_String::as_symbol(detailed_message, THREAD);
1928 }
1929 return NULL;
1930 }
1931
1932 void java_lang_Throwable::set_message(oop throwable, oop value) {
1933 throwable->obj_field_put(detailMessage_offset, value);
1934 }
1935
1936
1937 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1938 throwable->obj_field_put(stackTrace_offset, st_element_array);
1939 }
1940
1941 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1942 set_stacktrace(throwable, NULL);
1943 }
1944
1945
1946 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1947 ResourceMark rm;
1948 Klass* k = throwable->klass();
1949 assert(k != NULL, "just checking");
1950 st->print("%s", k->external_name());
1951 oop msg = message(throwable);
1952 if (msg != NULL) {
1953 st->print(": %s", java_lang_String::as_utf8_string(msg));
1954 }
1955 }
1956
1957 // After this many redefines, the stack trace is unreliable.
1958 const int MAX_VERSION = USHRT_MAX;
1959
1960 static inline bool version_matches(Method* method, int version) {
1961 assert(version < MAX_VERSION, "version is too big");
1962 return method != NULL && (method->constants()->version() == version);
1963 }
1964
1965
1966 // This class provides a simple wrapper over the internal structure of
1967 // exception backtrace to insulate users of the backtrace from needing
1968 // to know what it looks like.
1969 class BacktraceBuilder: public StackObj {
1970 friend class BacktraceIterator;
1971 private:
1972 Handle _backtrace;
1973 objArrayOop _head;
1974 typeArrayOop _methods;
1975 typeArrayOop _bcis;
1976 objArrayOop _mirrors;
1977 typeArrayOop _names; // needed to insulate method name against redefinition
1978 int _index;
1979 NoSafepointVerifier _nsv;
1980
1981 enum {
1982 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1983 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1984 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1985 trace_names_offset = java_lang_Throwable::trace_names_offset,
1986 trace_next_offset = java_lang_Throwable::trace_next_offset,
1987 trace_size = java_lang_Throwable::trace_size,
1988 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1989 };
1990
1991 // get info out of chunks
1992 static typeArrayOop get_methods(objArrayHandle chunk) {
1993 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1994 assert(methods != NULL, "method array should be initialized in backtrace");
1995 return methods;
1996 }
1997 static typeArrayOop get_bcis(objArrayHandle chunk) {
1998 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1999 assert(bcis != NULL, "bci array should be initialized in backtrace");
2000 return bcis;
2001 }
2002 static objArrayOop get_mirrors(objArrayHandle chunk) {
2003 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2004 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2005 return mirrors;
2006 }
2007 static typeArrayOop get_names(objArrayHandle chunk) {
2008 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2009 assert(names != NULL, "names array should be initialized in backtrace");
2010 return names;
2011 }
2012
2013 public:
2014
2015 // constructor for new backtrace
2016 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2017 expand(CHECK);
2018 _backtrace = Handle(THREAD, _head);
2019 _index = 0;
2020 }
2021
2022 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2023 _methods = get_methods(backtrace);
2024 _bcis = get_bcis(backtrace);
2025 _mirrors = get_mirrors(backtrace);
2026 _names = get_names(backtrace);
2027 assert(_methods->length() == _bcis->length() &&
2028 _methods->length() == _mirrors->length() &&
2029 _mirrors->length() == _names->length(),
2030 "method and source information arrays should match");
2031
2032 // head is the preallocated backtrace
2033 _head = backtrace();
2034 _backtrace = Handle(thread, _head);
2035 _index = 0;
2036 }
2037
2038 void expand(TRAPS) {
2039 objArrayHandle old_head(THREAD, _head);
2040 PauseNoSafepointVerifier pnsv(&_nsv);
2041
2042 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2043 objArrayHandle new_head(THREAD, head);
2044
2045 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2046 typeArrayHandle new_methods(THREAD, methods);
2047
2048 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2049 typeArrayHandle new_bcis(THREAD, bcis);
2050
2051 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2052 objArrayHandle new_mirrors(THREAD, mirrors);
2053
2054 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2055 typeArrayHandle new_names(THREAD, names);
2056
2057 if (!old_head.is_null()) {
2058 old_head->obj_at_put(trace_next_offset, new_head());
2059 }
2060 new_head->obj_at_put(trace_methods_offset, new_methods());
2061 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2062 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2063 new_head->obj_at_put(trace_names_offset, new_names());
2064
2065 _head = new_head();
2066 _methods = new_methods();
2067 _bcis = new_bcis();
2068 _mirrors = new_mirrors();
2069 _names = new_names();
2070 _index = 0;
2071 }
2072
2073 oop backtrace() {
2074 return _backtrace();
2075 }
2076
2077 inline void push(Method* method, int bci, TRAPS) {
2078 // Smear the -1 bci to 0 since the array only holds unsigned
2079 // shorts. The later line number lookup would just smear the -1
2080 // to a 0 even if it could be recorded.
2081 if (bci == SynchronizationEntryBCI) bci = 0;
2082
2083 if (_index >= trace_chunk_size) {
2084 methodHandle mhandle(THREAD, method);
2085 expand(CHECK);
2086 method = mhandle();
2087 }
2088
2089 _methods->ushort_at_put(_index, method->orig_method_idnum());
2090 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2091
2092 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2093 // klass owning the symbols alive so their refcounts aren't decremented.
2094 Symbol* name = method->name();
2095 _names->symbol_at_put(_index, name);
2096
2097 // We need to save the mirrors in the backtrace to keep the class
2098 // from being unloaded while we still have this stack trace.
2099 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2100 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2101 _index++;
2102 }
2103
2104 };
2105
2106 struct BacktraceElement : public StackObj {
2107 int _method_id;
2108 int _bci;
2109 int _version;
2110 Symbol* _name;
2111 Handle _mirror;
2112 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2113 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2114 };
2115
2116 class BacktraceIterator : public StackObj {
2117 int _index;
2118 objArrayHandle _result;
2119 objArrayHandle _mirrors;
2120 typeArrayHandle _methods;
2121 typeArrayHandle _bcis;
2122 typeArrayHandle _names;
2123
2124 void init(objArrayHandle result, Thread* thread) {
2125 // Get method id, bci, version and mirror from chunk
2126 _result = result;
2127 if (_result.not_null()) {
2128 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2129 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2130 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2131 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2132 _index = 0;
2133 }
2134 }
2135 public:
2136 BacktraceIterator(objArrayHandle result, Thread* thread) {
2137 init(result, thread);
2138 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2139 }
2140
2141 BacktraceElement next(Thread* thread) {
2142 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2143 _methods->ushort_at(_index),
2144 Backtrace::version_at(_bcis->int_at(_index)),
2145 Backtrace::bci_at(_bcis->int_at(_index)),
2146 _names->symbol_at(_index));
2147 _index++;
2148
2149 if (_index >= java_lang_Throwable::trace_chunk_size) {
2150 int next_offset = java_lang_Throwable::trace_next_offset;
2151 // Get next chunk
2152 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2153 init(result, thread);
2154 }
2155 return e;
2156 }
2157
2158 bool repeat() {
2159 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2160 }
2161 };
2162
2163
2164 // Print stack trace element to resource allocated buffer
2165 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2166 int version, int bci, Symbol* name) {
2167 ResourceMark rm;
2168
2169 // Get strings and string lengths
2170 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2171 const char* klass_name = holder->external_name();
2172 int buf_len = (int)strlen(klass_name);
2173
2174 char* method_name = name->as_C_string();
2175 buf_len += (int)strlen(method_name);
2176
2177 char* source_file_name = NULL;
2178 Symbol* source = Backtrace::get_source_file_name(holder, version);
2179 if (source != NULL) {
2180 source_file_name = source->as_C_string();
2181 buf_len += (int)strlen(source_file_name);
2182 }
2183
2184 char *module_name = NULL, *module_version = NULL;
2185 ModuleEntry* module = holder->module();
2186 if (module->is_named()) {
2187 module_name = module->name()->as_C_string();
2188 buf_len += (int)strlen(module_name);
2189 if (module->version() != NULL) {
2190 module_version = module->version()->as_C_string();
2191 buf_len += (int)strlen(module_version);
2192 }
2193 }
2194
2195 // Allocate temporary buffer with extra space for formatting and line number
2196 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2197
2198 // Print stack trace line in buffer
2199 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2200
2201 // Print module information
2202 if (module_name != NULL) {
2203 if (module_version != NULL) {
2204 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2205 } else {
2206 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2207 }
2208 }
2209
2210 // The method can be NULL if the requested class version is gone
2211 Method* method = holder->method_with_orig_idnum(method_id, version);
2212 if (!version_matches(method, version)) {
2213 strcat(buf, "Redefined)");
2214 } else {
2215 int line_number = Backtrace::get_line_number(method, bci);
2216 if (line_number == -2) {
2217 strcat(buf, "Native Method)");
2218 } else {
2219 if (source_file_name != NULL && (line_number != -1)) {
2220 // Sourcename and linenumber
2221 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2222 } else if (source_file_name != NULL) {
2223 // Just sourcename
2224 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2225 } else {
2226 // Neither sourcename nor linenumber
2227 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2228 }
2229 CompiledMethod* nm = method->code();
2230 if (WizardMode && nm != NULL) {
2231 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2232 }
2233 }
2234 }
2235
2236 st->print_cr("%s", buf);
2237 }
2238
2239 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2240 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2241 int method_id = method->orig_method_idnum();
2242 int version = method->constants()->version();
2243 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2244 }
2245
2246 /**
2247 * Print the throwable message and its stack trace plus all causes by walking the
2248 * cause chain. The output looks the same as of Throwable.printStackTrace().
2249 */
2250 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2251 // First, print the message.
2252 print(throwable(), st);
2253 st->cr();
2254
2255 // Now print the stack trace.
2256 Thread* THREAD = Thread::current();
2257 while (throwable.not_null()) {
2258 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2259 if (result.is_null()) {
2260 st->print_raw_cr("\t<<no stack trace available>>");
2261 return;
2262 }
2263 BacktraceIterator iter(result, THREAD);
2264
2265 while (iter.repeat()) {
2266 BacktraceElement bte = iter.next(THREAD);
2267 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2268 }
2269 {
2270 // Call getCause() which doesn't necessarily return the _cause field.
2271 EXCEPTION_MARK;
2272 JavaValue cause(T_OBJECT);
2273 JavaCalls::call_virtual(&cause,
2274 throwable,
2275 throwable->klass(),
2276 vmSymbols::getCause_name(),
2277 vmSymbols::void_throwable_signature(),
2278 THREAD);
2279 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2280 if (HAS_PENDING_EXCEPTION) {
2281 CLEAR_PENDING_EXCEPTION;
2282 throwable = Handle();
2283 } else {
2284 throwable = Handle(THREAD, (oop) cause.get_jobject());
2285 if (throwable.not_null()) {
2286 st->print("Caused by: ");
2287 print(throwable(), st);
2288 st->cr();
2289 }
2290 }
2291 }
2292 }
2293 }
2294
2295 /**
2296 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2297 */
2298 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2299 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2300 JavaValue result(T_VOID);
2301 JavaCalls::call_virtual(&result,
2302 throwable,
2303 SystemDictionary::Throwable_klass(),
2304 vmSymbols::printStackTrace_name(),
2305 vmSymbols::void_method_signature(),
2306 THREAD);
2307 }
2308
2309 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2310 if (!StackTraceInThrowable) return;
2311 ResourceMark rm(THREAD);
2312
2313 // Start out by clearing the backtrace for this object, in case the VM
2314 // runs out of memory while allocating the stack trace
2315 set_backtrace(throwable(), NULL);
2316 // Clear lazily constructed Java level stacktrace if refilling occurs
2317 // This is unnecessary in 1.7+ but harmless
2318 clear_stacktrace(throwable());
2319
2320 int max_depth = MaxJavaStackTraceDepth;
2321 JavaThread* thread = (JavaThread*)THREAD;
2322
2323 BacktraceBuilder bt(CHECK);
2324
2325 // If there is no Java frame just return the method that was being called
2326 // with bci 0
2327 if (!thread->has_last_Java_frame()) {
2328 if (max_depth >= 1 && method() != NULL) {
2329 bt.push(method(), 0, CHECK);
2330 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2331 set_depth(throwable(), 1);
2332 set_backtrace(throwable(), bt.backtrace());
2333 }
2334 return;
2335 }
2336
2337 // Instead of using vframe directly, this version of fill_in_stack_trace
2338 // basically handles everything by hand. This significantly improved the
2339 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2340 // See bug 6333838 for more details.
2341 // The "ASSERT" here is to verify this method generates the exactly same stack
2342 // trace as utilizing vframe.
2343 #ifdef ASSERT
2344 vframeStream st(thread);
2345 methodHandle st_method(THREAD, st.method());
2346 #endif
2347 int total_count = 0;
2348 RegisterMap map(thread, false);
2349 int decode_offset = 0;
2350 CompiledMethod* nm = NULL;
2351 bool skip_fillInStackTrace_check = false;
2352 bool skip_throwableInit_check = false;
2353 bool skip_hidden = !ShowHiddenFrames;
2354
2355 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2356 Method* method = NULL;
2357 int bci = 0;
2358
2359 // Compiled java method case.
2360 if (decode_offset != 0) {
2361 DebugInfoReadStream stream(nm, decode_offset);
2362 decode_offset = stream.read_int();
2363 method = (Method*)nm->metadata_at(stream.read_int());
2364 bci = stream.read_bci();
2365 } else {
2366 if (fr.is_first_frame()) break;
2367 address pc = fr.pc();
2368 if (fr.is_interpreted_frame()) {
2369 address bcp = fr.interpreter_frame_bcp();
2370 method = fr.interpreter_frame_method();
2371 bci = method->bci_from(bcp);
2372 fr = fr.sender(&map);
2373 } else {
2374 CodeBlob* cb = fr.cb();
2375 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2376 // but non nmethod
2377 fr = fr.sender(&map);
2378 if (cb == NULL || !cb->is_compiled()) {
2379 continue;
2380 }
2381 nm = cb->as_compiled_method();
2382 if (nm->method()->is_native()) {
2383 method = nm->method();
2384 bci = 0;
2385 } else {
2386 PcDesc* pd = nm->pc_desc_at(pc);
2387 decode_offset = pd->scope_decode_offset();
2388 // if decode_offset is not equal to 0, it will execute the
2389 // "compiled java method case" at the beginning of the loop.
2390 continue;
2391 }
2392 }
2393 }
2394 #ifdef ASSERT
2395 assert(st_method() == method && st.bci() == bci,
2396 "Wrong stack trace");
2397 st.next();
2398 // vframeStream::method isn't GC-safe so store off a copy
2399 // of the Method* in case we GC.
2400 if (!st.at_end()) {
2401 st_method = st.method();
2402 }
2403 #endif
2404
2405 // the format of the stacktrace will be:
2406 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2407 // - 0 or more <init> methods for the exception class (skipped)
2408 // - rest of the stack
2409
2410 if (!skip_fillInStackTrace_check) {
2411 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2412 throwable->is_a(method->method_holder())) {
2413 continue;
2414 }
2415 else {
2416 skip_fillInStackTrace_check = true; // gone past them all
2417 }
2418 }
2419 if (!skip_throwableInit_check) {
2420 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2421
2422 // skip <init> methods of the exception class and superclasses
2423 // This is simlar to classic VM.
2424 if (method->name() == vmSymbols::object_initializer_name() &&
2425 throwable->is_a(method->method_holder())) {
2426 continue;
2427 } else {
2428 // there are none or we've seen them all - either way stop checking
2429 skip_throwableInit_check = true;
2430 }
2431 }
2432 if (method->is_hidden()) {
2433 if (skip_hidden) continue;
2434 }
2435 bt.push(method, bci, CHECK);
2436 total_count++;
2437 }
2438
2439 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2440
2441 // Put completed stack trace into throwable object
2442 set_backtrace(throwable(), bt.backtrace());
2443 set_depth(throwable(), total_count);
2444 }
2445
2446 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2447 // No-op if stack trace is disabled
2448 if (!StackTraceInThrowable) {
2449 return;
2450 }
2451
2452 // Disable stack traces for some preallocated out of memory errors
2453 if (!Universe::should_fill_in_stack_trace(throwable)) {
2454 return;
2455 }
2456
2457 PRESERVE_EXCEPTION_MARK;
2458
2459 JavaThread* thread = JavaThread::active();
2460 fill_in_stack_trace(throwable, method, thread);
2461 // ignore exceptions thrown during stack trace filling
2462 CLEAR_PENDING_EXCEPTION;
2463 }
2464
2465 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2466 // Allocate stack trace - backtrace is created but not filled in
2467
2468 // No-op if stack trace is disabled
2469 if (!StackTraceInThrowable) return;
2470 BacktraceBuilder bt(CHECK); // creates a backtrace
2471 set_backtrace(throwable(), bt.backtrace());
2472 }
2473
2474
2475 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2476 // Fill in stack trace into preallocated backtrace (no GC)
2477
2478 // No-op if stack trace is disabled
2479 if (!StackTraceInThrowable) return;
2480
2481 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2482
2483 JavaThread* THREAD = JavaThread::current();
2484
2485 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2486 assert(backtrace.not_null(), "backtrace should have been preallocated");
2487
2488 ResourceMark rm(THREAD);
2489 vframeStream st(THREAD);
2490
2491 BacktraceBuilder bt(THREAD, backtrace);
2492
2493 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2494 // methods as preallocated errors aren't created by "java" code.
2495
2496 // fill in as much stack trace as possible
2497 int chunk_count = 0;
2498 for (;!st.at_end(); st.next()) {
2499 bt.push(st.method(), st.bci(), CHECK);
2500 chunk_count++;
2501
2502 // Bail-out for deep stacks
2503 if (chunk_count >= trace_chunk_size) break;
2504 }
2505 set_depth(throwable(), chunk_count);
2506 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2507
2508 // We support the Throwable immutability protocol defined for Java 7.
2509 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2510 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2511 }
2512
2513 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2514 objArrayHandle stack_trace_array_h, TRAPS) {
2515
2516 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2517 THROW(vmSymbols::java_lang_NullPointerException());
2518 }
2519
2520 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2521
2522 if (stack_trace_array_h->length() != depth(throwable())) {
2523 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2524 }
2525
2526 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2527 BacktraceIterator iter(result, THREAD);
2528
2529 int index = 0;
2530 while (iter.repeat()) {
2531 BacktraceElement bte = iter.next(THREAD);
2532
2533 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2534
2535 if (stack_trace_element.is_null()) {
2536 THROW(vmSymbols::java_lang_NullPointerException());
2537 }
2538
2539 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2540 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2541
2542 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2543 method,
2544 bte._version,
2545 bte._bci,
2546 bte._name, CHECK);
2547 }
2548 }
2549
2550 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2551 // Allocate java.lang.StackTraceElement instance
2552 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2553 assert(k != NULL, "must be loaded in 1.4+");
2554 if (k->should_be_initialized()) {
2555 k->initialize(CHECK_0);
2556 }
2557
2558 Handle element = k->allocate_instance_handle(CHECK_0);
2559
2560 int version = method->constants()->version();
2561 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2562 return element();
2563 }
2564
2565 void java_lang_StackTraceElement::fill_in(Handle element,
2566 InstanceKlass* holder, const methodHandle& method,
2567 int version, int bci, Symbol* name, TRAPS) {
2568 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2569
2570 // Fill in class name
2571 ResourceMark rm(THREAD);
2572 const char* str = holder->external_name();
2573 oop classname = StringTable::intern(str, CHECK);
2574 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2575 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror());
2576
2577 oop loader = holder->class_loader();
2578 if (loader != NULL) {
2579 oop loader_name = java_lang_ClassLoader::name(loader);
2580 if (loader_name != NULL)
2581 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2582 }
2583
2584 // Fill in method name
2585 oop methodname = StringTable::intern(name, CHECK);
2586 java_lang_StackTraceElement::set_methodName(element(), methodname);
2587
2588 // Fill in module name and version
2589 ModuleEntry* module = holder->module();
2590 if (module->is_named()) {
2591 oop module_name = StringTable::intern(module->name(), CHECK);
2592 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2593 oop module_version;
2594 if (module->version() != NULL) {
2595 module_version = StringTable::intern(module->version(), CHECK);
2596 } else {
2597 module_version = NULL;
2598 }
2599 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2600 }
2601
2602 if (method() == NULL || !version_matches(method(), version)) {
2603 // The method was redefined, accurate line number information isn't available
2604 java_lang_StackTraceElement::set_fileName(element(), NULL);
2605 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2606 } else {
2607 // Fill in source file name and line number.
2608 Symbol* source = Backtrace::get_source_file_name(holder, version);
2609 if (ShowHiddenFrames && source == NULL)
2610 source = vmSymbols::unknown_class_name();
2611 oop filename = StringTable::intern(source, CHECK);
2612 java_lang_StackTraceElement::set_fileName(element(), filename);
2613
2614 int line_number = Backtrace::get_line_number(method, bci);
2615 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2616 }
2617 }
2618
2619 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2620 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2621 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2622 // we should expand MemberName::name when Throwable uses StackTrace
2623 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2624 return method;
2625 }
2626
2627 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2628 // set Method* or mid/cpref
2629 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2630 InstanceKlass* ik = method->method_holder();
2631 CallInfo info(method(), ik, CHECK);
2632 MethodHandles::init_method_MemberName(mname, info);
2633 // set bci
2634 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2635 // method may be redefined; store the version
2636 int version = method->constants()->version();
2637 assert((jushort)version == version, "version should be short");
2638 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2639 }
2640
2641 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2642 ResourceMark rm(THREAD);
2643 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2644 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2645 InstanceKlass* holder = InstanceKlass::cast(clazz);
2646 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2647
2648 short version = stackFrame->short_field(_version_offset);
2649 short bci = stackFrame->short_field(_bci_offset);
2650 Symbol* name = method->name();
2651 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2652 }
2653
2654 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2655 macro(_memberName_offset, k, "memberName", object_signature, false); \
2656 macro(_bci_offset, k, "bci", short_signature, false)
2657
2658 void java_lang_StackFrameInfo::compute_offsets() {
2659 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2660 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2661 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2662 }
2663
2664 #if INCLUDE_CDS
2665 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2666 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2667 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2668 }
2669 #endif
2670
2671 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2672 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2673 macro(_locals_offset, k, "locals", object_array_signature, false); \
2674 macro(_operands_offset, k, "operands", object_array_signature, false); \
2675 macro(_mode_offset, k, "mode", int_signature, false)
2676
2677 void java_lang_LiveStackFrameInfo::compute_offsets() {
2678 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2679 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2680 }
2681
2682 #if INCLUDE_CDS
2683 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2684 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2685 }
2686 #endif
2687
2688 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2689 macro(override_offset, k, "override", bool_signature, false)
2690
2691 void java_lang_reflect_AccessibleObject::compute_offsets() {
2692 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2693 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2694 }
2695
2696 #if INCLUDE_CDS
2697 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2698 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2699 }
2700 #endif
2701
2702 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2703 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2704 return (jboolean) reflect->bool_field(override_offset);
2705 }
2706
2707 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2708 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2709 reflect->bool_field_put(override_offset, (int) value);
2710 }
2711
2712 #define METHOD_FIELDS_DO(macro) \
2713 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2714 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2715 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2716 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2717 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2718 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2719 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2720 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2721 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2722 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2723 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2724
2725 void java_lang_reflect_Method::compute_offsets() {
2726 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2727 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2728 }
2729
2730 #if INCLUDE_CDS
2731 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2732 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2733 }
2734 #endif
2735
2736 Handle java_lang_reflect_Method::create(TRAPS) {
2737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2738 Klass* klass = SystemDictionary::reflect_Method_klass();
2739 // This class is eagerly initialized during VM initialization, since we keep a refence
2740 // to one of the methods
2741 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2742 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2743 }
2744
2745 oop java_lang_reflect_Method::clazz(oop reflect) {
2746 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2747 return reflect->obj_field(clazz_offset);
2748 }
2749
2750 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2751 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2752 reflect->obj_field_put(clazz_offset, value);
2753 }
2754
2755 int java_lang_reflect_Method::slot(oop reflect) {
2756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2757 return reflect->int_field(slot_offset);
2758 }
2759
2760 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2761 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2762 reflect->int_field_put(slot_offset, value);
2763 }
2764
2765 void java_lang_reflect_Method::set_name(oop method, oop value) {
2766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2767 method->obj_field_put(name_offset, value);
2768 }
2769
2770 oop java_lang_reflect_Method::return_type(oop method) {
2771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2772 return method->obj_field(returnType_offset);
2773 }
2774
2775 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2776 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2777 method->obj_field_put(returnType_offset, value);
2778 }
2779
2780 oop java_lang_reflect_Method::parameter_types(oop method) {
2781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2782 return method->obj_field(parameterTypes_offset);
2783 }
2784
2785 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2786 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2787 method->obj_field_put(parameterTypes_offset, value);
2788 }
2789
2790 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2792 method->obj_field_put(exceptionTypes_offset, value);
2793 }
2794
2795 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2797 method->int_field_put(modifiers_offset, value);
2798 }
2799
2800 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2802 method->obj_field_put(signature_offset, value);
2803 }
2804
2805 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2806 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2807 method->obj_field_put(annotations_offset, value);
2808 }
2809
2810 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2811 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2812 method->obj_field_put(parameter_annotations_offset, value);
2813 }
2814
2815 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2816 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2817 method->obj_field_put(annotation_default_offset, value);
2818 }
2819
2820 #define CONSTRUCTOR_FIELDS_DO(macro) \
2821 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2822 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2823 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2824 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2825 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2826 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2827 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2828 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2829
2830 void java_lang_reflect_Constructor::compute_offsets() {
2831 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2832 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2833 }
2834
2835 #if INCLUDE_CDS
2836 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2837 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2838 }
2839 #endif
2840
2841 Handle java_lang_reflect_Constructor::create(TRAPS) {
2842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2843 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2844 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2845 InstanceKlass* ik = InstanceKlass::cast(k);
2846 // Ensure it is initialized
2847 ik->initialize(CHECK_NH);
2848 return ik->allocate_instance_handle(THREAD);
2849 }
2850
2851 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2852 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2853 return reflect->obj_field(clazz_offset);
2854 }
2855
2856 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2857 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2858 reflect->obj_field_put(clazz_offset, value);
2859 }
2860
2861 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2862 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2863 return constructor->obj_field(parameterTypes_offset);
2864 }
2865
2866 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2867 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2868 constructor->obj_field_put(parameterTypes_offset, value);
2869 }
2870
2871 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2872 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2873 constructor->obj_field_put(exceptionTypes_offset, value);
2874 }
2875
2876 int java_lang_reflect_Constructor::slot(oop reflect) {
2877 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2878 return reflect->int_field(slot_offset);
2879 }
2880
2881 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2882 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2883 reflect->int_field_put(slot_offset, value);
2884 }
2885
2886 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2887 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2888 constructor->int_field_put(modifiers_offset, value);
2889 }
2890
2891 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2892 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2893 constructor->obj_field_put(signature_offset, value);
2894 }
2895
2896 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2897 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2898 constructor->obj_field_put(annotations_offset, value);
2899 }
2900
2901 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2902 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2903 method->obj_field_put(parameter_annotations_offset, value);
2904 }
2905
2906 #define FIELD_FIELDS_DO(macro) \
2907 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2908 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2909 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
2910 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2911 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2912 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2913 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
2914
2915 void java_lang_reflect_Field::compute_offsets() {
2916 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
2917 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2918 }
2919
2920 #if INCLUDE_CDS
2921 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
2922 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2923 }
2924 #endif
2925
2926 Handle java_lang_reflect_Field::create(TRAPS) {
2927 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2928 Symbol* name = vmSymbols::java_lang_reflect_Field();
2929 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2930 InstanceKlass* ik = InstanceKlass::cast(k);
2931 // Ensure it is initialized
2932 ik->initialize(CHECK_NH);
2933 return ik->allocate_instance_handle(THREAD);
2934 }
2935
2936 oop java_lang_reflect_Field::clazz(oop reflect) {
2937 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2938 return reflect->obj_field(clazz_offset);
2939 }
2940
2941 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2942 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2943 reflect->obj_field_put(clazz_offset, value);
2944 }
2945
2946 oop java_lang_reflect_Field::name(oop field) {
2947 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2948 return field->obj_field(name_offset);
2949 }
2950
2951 void java_lang_reflect_Field::set_name(oop field, oop value) {
2952 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2953 field->obj_field_put(name_offset, value);
2954 }
2955
2956 oop java_lang_reflect_Field::type(oop field) {
2957 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2958 return field->obj_field(type_offset);
2959 }
2960
2961 void java_lang_reflect_Field::set_type(oop field, oop value) {
2962 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2963 field->obj_field_put(type_offset, value);
2964 }
2965
2966 int java_lang_reflect_Field::slot(oop reflect) {
2967 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2968 return reflect->int_field(slot_offset);
2969 }
2970
2971 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2972 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2973 reflect->int_field_put(slot_offset, value);
2974 }
2975
2976 int java_lang_reflect_Field::modifiers(oop field) {
2977 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2978 return field->int_field(modifiers_offset);
2979 }
2980
2981 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2982 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2983 field->int_field_put(modifiers_offset, value);
2984 }
2985
2986 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2988 field->obj_field_put(signature_offset, value);
2989 }
2990
2991 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2993 field->obj_field_put(annotations_offset, value);
2994 }
2995
2996 #define CONSTANTPOOL_FIELDS_DO(macro) \
2997 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
2998
2999 void reflect_ConstantPool::compute_offsets() {
3000 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3001 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3002 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3003 }
3004
3005 #if INCLUDE_CDS
3006 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3007 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3008 }
3009 #endif
3010
3011 #define PARAMETER_FIELDS_DO(macro) \
3012 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3013 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3014 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3015 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3016
3017 void java_lang_reflect_Parameter::compute_offsets() {
3018 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3019 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3020 }
3021
3022 #if INCLUDE_CDS
3023 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3024 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3025 }
3026 #endif
3027
3028 Handle java_lang_reflect_Parameter::create(TRAPS) {
3029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3030 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3031 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3032 InstanceKlass* ik = InstanceKlass::cast(k);
3033 // Ensure it is initialized
3034 ik->initialize(CHECK_NH);
3035 return ik->allocate_instance_handle(THREAD);
3036 }
3037
3038 oop java_lang_reflect_Parameter::name(oop param) {
3039 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3040 return param->obj_field(name_offset);
3041 }
3042
3043 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3044 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3045 param->obj_field_put(name_offset, value);
3046 }
3047
3048 int java_lang_reflect_Parameter::modifiers(oop param) {
3049 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3050 return param->int_field(modifiers_offset);
3051 }
3052
3053 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3054 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3055 param->int_field_put(modifiers_offset, value);
3056 }
3057
3058 int java_lang_reflect_Parameter::index(oop param) {
3059 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3060 return param->int_field(index_offset);
3061 }
3062
3063 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3064 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3065 param->int_field_put(index_offset, value);
3066 }
3067
3068 oop java_lang_reflect_Parameter::executable(oop param) {
3069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3070 return param->obj_field(executable_offset);
3071 }
3072
3073 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3074 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3075 param->obj_field_put(executable_offset, value);
3076 }
3077
3078
3079 int java_lang_Module::loader_offset;
3080 int java_lang_Module::name_offset;
3081 int java_lang_Module::_module_entry_offset = -1;
3082
3083 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3084 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3085 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3086 vmSymbols::java_lang_module_init_signature(),
3087 loader, module_name, CHECK_NH);
3088 }
3089
3090 #define MODULE_FIELDS_DO(macro) \
3091 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3092 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3093
3094 void java_lang_Module::compute_offsets() {
3095 InstanceKlass* k = SystemDictionary::Module_klass();
3096 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3097 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3098 }
3099
3100 #if INCLUDE_CDS
3101 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3102 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3103 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3104 }
3105 #endif
3106
3107 oop java_lang_Module::loader(oop module) {
3108 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3109 return module->obj_field(loader_offset);
3110 }
3111
3112 void java_lang_Module::set_loader(oop module, oop value) {
3113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3114 module->obj_field_put(loader_offset, value);
3115 }
3116
3117 oop java_lang_Module::name(oop module) {
3118 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3119 return module->obj_field(name_offset);
3120 }
3121
3122 void java_lang_Module::set_name(oop module, oop value) {
3123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3124 module->obj_field_put(name_offset, value);
3125 }
3126
3127 ModuleEntry* java_lang_Module::module_entry(oop module) {
3128 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3129 assert(module != NULL, "module can't be null");
3130 assert(oopDesc::is_oop(module), "module must be oop");
3131
3132 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3133 if (module_entry == NULL) {
3134 // If the inject field containing the ModuleEntry* is null then return the
3135 // class loader's unnamed module.
3136 oop loader = java_lang_Module::loader(module);
3137 Handle h_loader = Handle(Thread::current(), loader);
3138 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3139 return loader_cld->unnamed_module();
3140 }
3141 return module_entry;
3142 }
3143
3144 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3145 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3146 assert(module != NULL, "module can't be null");
3147 assert(oopDesc::is_oop(module), "module must be oop");
3148 module->address_field_put(_module_entry_offset, (address)module_entry);
3149 }
3150
3151 Handle reflect_ConstantPool::create(TRAPS) {
3152 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3153 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3154 // Ensure it is initialized
3155 k->initialize(CHECK_NH);
3156 return k->allocate_instance_handle(THREAD);
3157 }
3158
3159
3160 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3162 oop mirror = value->pool_holder()->java_mirror();
3163 // Save the mirror to get back the constant pool.
3164 reflect->obj_field_put(_oop_offset, mirror);
3165 }
3166
3167 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3168 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3169
3170 oop mirror = reflect->obj_field(_oop_offset);
3171 Klass* k = java_lang_Class::as_Klass(mirror);
3172 assert(k->is_instance_klass(), "Must be");
3173
3174 // Get the constant pool back from the klass. Since class redefinition
3175 // merges the new constant pool into the old, this is essentially the
3176 // same constant pool as the original. If constant pool merging is
3177 // no longer done in the future, this will have to change to save
3178 // the original.
3179 return InstanceKlass::cast(k)->constants();
3180 }
3181
3182 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3183 macro(_base_offset, k, "base", object_signature, false)
3184
3185 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3186 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3187 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3188 }
3189
3190 #if INCLUDE_CDS
3191 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3192 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3193 }
3194 #endif
3195
3196 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3197 Klass* k = SystemDictionary::box_klass(type);
3198 if (k == NULL) return NULL;
3199 InstanceKlass* ik = InstanceKlass::cast(k);
3200 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3201 return ik->allocate_instance(THREAD);
3202 }
3203
3204
3205 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3206 oop box = initialize_and_allocate(type, CHECK_0);
3207 if (box == NULL) return NULL;
3208 switch (type) {
3209 case T_BOOLEAN:
3210 box->bool_field_put(value_offset, value->z);
3211 break;
3212 case T_CHAR:
3213 box->char_field_put(value_offset, value->c);
3214 break;
3215 case T_FLOAT:
3216 box->float_field_put(value_offset, value->f);
3217 break;
3218 case T_DOUBLE:
3219 box->double_field_put(long_value_offset, value->d);
3220 break;
3221 case T_BYTE:
3222 box->byte_field_put(value_offset, value->b);
3223 break;
3224 case T_SHORT:
3225 box->short_field_put(value_offset, value->s);
3226 break;
3227 case T_INT:
3228 box->int_field_put(value_offset, value->i);
3229 break;
3230 case T_LONG:
3231 box->long_field_put(long_value_offset, value->j);
3232 break;
3233 default:
3234 return NULL;
3235 }
3236 return box;
3237 }
3238
3239
3240 BasicType java_lang_boxing_object::basic_type(oop box) {
3241 if (box == NULL) return T_ILLEGAL;
3242 BasicType type = SystemDictionary::box_klass_type(box->klass());
3243 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3244 return T_ILLEGAL;
3245 return type;
3246 }
3247
3248
3249 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3250 BasicType type = SystemDictionary::box_klass_type(box->klass());
3251 switch (type) {
3252 case T_BOOLEAN:
3253 value->z = box->bool_field(value_offset);
3254 break;
3255 case T_CHAR:
3256 value->c = box->char_field(value_offset);
3257 break;
3258 case T_FLOAT:
3259 value->f = box->float_field(value_offset);
3260 break;
3261 case T_DOUBLE:
3262 value->d = box->double_field(long_value_offset);
3263 break;
3264 case T_BYTE:
3265 value->b = box->byte_field(value_offset);
3266 break;
3267 case T_SHORT:
3268 value->s = box->short_field(value_offset);
3269 break;
3270 case T_INT:
3271 value->i = box->int_field(value_offset);
3272 break;
3273 case T_LONG:
3274 value->j = box->long_field(long_value_offset);
3275 break;
3276 default:
3277 return T_ILLEGAL;
3278 } // end switch
3279 return type;
3280 }
3281
3282
3283 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3284 BasicType type = SystemDictionary::box_klass_type(box->klass());
3285 switch (type) {
3286 case T_BOOLEAN:
3287 box->bool_field_put(value_offset, value->z);
3288 break;
3289 case T_CHAR:
3290 box->char_field_put(value_offset, value->c);
3291 break;
3292 case T_FLOAT:
3293 box->float_field_put(value_offset, value->f);
3294 break;
3295 case T_DOUBLE:
3296 box->double_field_put(long_value_offset, value->d);
3297 break;
3298 case T_BYTE:
3299 box->byte_field_put(value_offset, value->b);
3300 break;
3301 case T_SHORT:
3302 box->short_field_put(value_offset, value->s);
3303 break;
3304 case T_INT:
3305 box->int_field_put(value_offset, value->i);
3306 break;
3307 case T_LONG:
3308 box->long_field_put(long_value_offset, value->j);
3309 break;
3310 default:
3311 return T_ILLEGAL;
3312 } // end switch
3313 return type;
3314 }
3315
3316
3317 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3318 switch (type) {
3319 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3320 case T_CHAR: st->print("%d", value->c); break;
3321 case T_BYTE: st->print("%d", value->b); break;
3322 case T_SHORT: st->print("%d", value->s); break;
3323 case T_INT: st->print("%d", value->i); break;
3324 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3325 case T_FLOAT: st->print("%f", value->f); break;
3326 case T_DOUBLE: st->print("%lf", value->d); break;
3327 default: st->print("type %d?", type); break;
3328 }
3329 }
3330
3331 // Support for java_lang_ref_Reference
3332
3333 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3334 assert(obj != NULL, "sanity");
3335 if (offset != java_lang_ref_Reference::referent_offset) {
3336 return false;
3337 }
3338
3339 Klass* k = obj->klass();
3340 if (!k->is_instance_klass()) {
3341 return false;
3342 }
3343
3344 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3345 bool is_reference = ik->reference_type() != REF_NONE;
3346 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3347 return is_reference;
3348 }
3349
3350 // Support for java_lang_ref_SoftReference
3351 //
3352
3353 #define SOFTREFERENCE_FIELDS_DO(macro) \
3354 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3355 macro(static_clock_offset, k, "clock", long_signature, true)
3356
3357 void java_lang_ref_SoftReference::compute_offsets() {
3358 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3359 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3360 }
3361
3362 #if INCLUDE_CDS
3363 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3364 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3365 }
3366 #endif
3367
3368 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3369 return ref->long_field(timestamp_offset);
3370 }
3371
3372 jlong java_lang_ref_SoftReference::clock() {
3373 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3374 oop base = ik->static_field_base_raw();
3375 return base->long_field(static_clock_offset);
3376 }
3377
3378 void java_lang_ref_SoftReference::set_clock(jlong value) {
3379 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3380 oop base = ik->static_field_base_raw();
3381 base->long_field_put(static_clock_offset, value);
3382 }
3383
3384 // Support for java_lang_invoke_DirectMethodHandle
3385
3386 int java_lang_invoke_DirectMethodHandle::_member_offset;
3387
3388 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3389 oop member_name = NULL;
3390 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3391 "a DirectMethodHandle oop is expected");
3392 return dmh->obj_field(member_offset_in_bytes());
3393 }
3394
3395 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3396 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3397
3398 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3399 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3400 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3401 }
3402
3403 #if INCLUDE_CDS
3404 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3405 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3406 }
3407 #endif
3408
3409 // Support for java_lang_invoke_MethodHandle
3410
3411 int java_lang_invoke_MethodHandle::_type_offset;
3412 int java_lang_invoke_MethodHandle::_form_offset;
3413
3414 int java_lang_invoke_MemberName::_clazz_offset;
3415 int java_lang_invoke_MemberName::_name_offset;
3416 int java_lang_invoke_MemberName::_type_offset;
3417 int java_lang_invoke_MemberName::_flags_offset;
3418 int java_lang_invoke_MemberName::_method_offset;
3419 int java_lang_invoke_MemberName::_vmindex_offset;
3420
3421 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3422 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3423
3424 int java_lang_invoke_LambdaForm::_vmentry_offset;
3425
3426 #define METHODHANDLE_FIELDS_DO(macro) \
3427 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3428 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3429
3430 void java_lang_invoke_MethodHandle::compute_offsets() {
3431 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3432 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3433 }
3434
3435 #if INCLUDE_CDS
3436 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3437 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3438 }
3439 #endif
3440
3441 #define MEMBERNAME_FIELDS_DO(macro) \
3442 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3443 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3444 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3445 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3446 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3447
3448 void java_lang_invoke_MemberName::compute_offsets() {
3449 InstanceKlass* k = SystemDictionary::MemberName_klass();
3450 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3451 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3452 }
3453
3454 #if INCLUDE_CDS
3455 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3456 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3457 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3458 }
3459 #endif
3460
3461 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3462 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3463 assert(k != NULL, "jdk mismatch");
3464 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3465 }
3466
3467 #if INCLUDE_CDS
3468 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3469 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3470 }
3471 #endif
3472
3473 #define LAMBDAFORM_FIELDS_DO(macro) \
3474 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3475
3476 void java_lang_invoke_LambdaForm::compute_offsets() {
3477 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3478 assert (k != NULL, "jdk mismatch");
3479 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3480 }
3481
3482 #if INCLUDE_CDS
3483 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3484 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3485 }
3486 #endif
3487
3488 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3489 return obj != NULL && is_subclass(obj->klass());
3490 }
3491
3492
3493 oop java_lang_invoke_MethodHandle::type(oop mh) {
3494 return mh->obj_field(_type_offset);
3495 }
3496
3497 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3498 mh->obj_field_put(_type_offset, mtype);
3499 }
3500
3501 oop java_lang_invoke_MethodHandle::form(oop mh) {
3502 assert(_form_offset != 0, "");
3503 return mh->obj_field(_form_offset);
3504 }
3505
3506 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3507 assert(_form_offset != 0, "");
3508 mh->obj_field_put(_form_offset, lform);
3509 }
3510
3511 /// MemberName accessors
3512
3513 oop java_lang_invoke_MemberName::clazz(oop mname) {
3514 assert(is_instance(mname), "wrong type");
3515 return mname->obj_field(_clazz_offset);
3516 }
3517
3518 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3519 assert(is_instance(mname), "wrong type");
3520 mname->obj_field_put(_clazz_offset, clazz);
3521 }
3522
3523 oop java_lang_invoke_MemberName::name(oop mname) {
3524 assert(is_instance(mname), "wrong type");
3525 return mname->obj_field(_name_offset);
3526 }
3527
3528 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3529 assert(is_instance(mname), "wrong type");
3530 mname->obj_field_put(_name_offset, name);
3531 }
3532
3533 oop java_lang_invoke_MemberName::type(oop mname) {
3534 assert(is_instance(mname), "wrong type");
3535 return mname->obj_field(_type_offset);
3536 }
3537
3538 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3539 assert(is_instance(mname), "wrong type");
3540 mname->obj_field_put(_type_offset, type);
3541 }
3542
3543 int java_lang_invoke_MemberName::flags(oop mname) {
3544 assert(is_instance(mname), "wrong type");
3545 return mname->int_field(_flags_offset);
3546 }
3547
3548 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3549 assert(is_instance(mname), "wrong type");
3550 mname->int_field_put(_flags_offset, flags);
3551 }
3552
3553
3554 // Return vmtarget from ResolvedMethodName method field through indirection
3555 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3556 assert(is_instance(mname), "wrong type");
3557 oop method = mname->obj_field(_method_offset);
3558 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3559 }
3560
3561 bool java_lang_invoke_MemberName::is_method(oop mname) {
3562 assert(is_instance(mname), "must be MemberName");
3563 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3564 }
3565
3566 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3567 assert(is_instance(mname), "wrong type");
3568 mname->obj_field_put(_method_offset, resolved_method);
3569 }
3570
3571 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3572 assert(is_instance(mname), "wrong type");
3573 return (intptr_t) mname->address_field(_vmindex_offset);
3574 }
3575
3576 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3577 assert(is_instance(mname), "wrong type");
3578 mname->address_field_put(_vmindex_offset, (address) index);
3579 }
3580
3581
3582 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3583 assert(is_instance(resolved_method), "wrong type");
3584 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3585 assert(m->is_method(), "must be");
3586 return m;
3587 }
3588
3589 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3590 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3591 assert(is_instance(resolved_method), "wrong type");
3592 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3593 }
3594
3595 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3596 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3597 oop resolved_method = ResolvedMethodTable::find_method(m());
3598 if (resolved_method == NULL) {
3599 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3600 if (!k->is_initialized()) {
3601 k->initialize(CHECK_NULL);
3602 }
3603 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3604 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3605 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3606 // distinct loaders) to ensure the metadata is kept alive.
3607 // This mirror may be different than the one in clazz field.
3608 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3609 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method));
3610 }
3611 return resolved_method;
3612 }
3613
3614 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3615 assert(is_instance(lform), "wrong type");
3616 return lform->obj_field(_vmentry_offset);
3617 }
3618
3619
3620 // Support for java_lang_invoke_MethodType
3621
3622 int java_lang_invoke_MethodType::_rtype_offset;
3623 int java_lang_invoke_MethodType::_ptypes_offset;
3624
3625 #define METHODTYPE_FIELDS_DO(macro) \
3626 macro(_rtype_offset, k, "rtype", class_signature, false); \
3627 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3628
3629 void java_lang_invoke_MethodType::compute_offsets() {
3630 InstanceKlass* k = SystemDictionary::MethodType_klass();
3631 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3632 }
3633
3634 #if INCLUDE_CDS
3635 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3636 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3637 }
3638 #endif
3639
3640 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3641 st->print("(");
3642 objArrayOop pts = ptypes(mt);
3643 for (int i = 0, limit = pts->length(); i < limit; i++) {
3644 java_lang_Class::print_signature(pts->obj_at(i), st);
3645 }
3646 st->print(")");
3647 java_lang_Class::print_signature(rtype(mt), st);
3648 }
3649
3650 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3651 ResourceMark rm;
3652 stringStream buffer(128);
3653 print_signature(mt, &buffer);
3654 const char* sigstr = buffer.base();
3655 int siglen = (int) buffer.size();
3656 Symbol *name;
3657 if (!intern_if_not_found) {
3658 name = SymbolTable::probe(sigstr, siglen);
3659 } else {
3660 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3661 }
3662 return name;
3663 }
3664
3665 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3666 if (oopDesc::equals(mt1, mt2))
3667 return true;
3668 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3669 return false;
3670 if (ptype_count(mt1) != ptype_count(mt2))
3671 return false;
3672 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3673 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3674 return false;
3675 }
3676 return true;
3677 }
3678
3679 oop java_lang_invoke_MethodType::rtype(oop mt) {
3680 assert(is_instance(mt), "must be a MethodType");
3681 return mt->obj_field(_rtype_offset);
3682 }
3683
3684 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3685 assert(is_instance(mt), "must be a MethodType");
3686 return (objArrayOop) mt->obj_field(_ptypes_offset);
3687 }
3688
3689 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3690 return ptypes(mt)->obj_at(idx);
3691 }
3692
3693 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3694 return ptypes(mt)->length();
3695 }
3696
3697 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3698 objArrayOop pts = ptypes(mt);
3699 int count = pts->length();
3700 int slots = 0;
3701 for (int i = 0; i < count; i++) {
3702 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3703 slots += type2size[bt];
3704 }
3705 return slots;
3706 }
3707
3708 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3709 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3710 return type2size[bt];
3711 }
3712
3713
3714 // Support for java_lang_invoke_CallSite
3715
3716 int java_lang_invoke_CallSite::_target_offset;
3717 int java_lang_invoke_CallSite::_context_offset;
3718
3719 #define CALLSITE_FIELDS_DO(macro) \
3720 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3721 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3722
3723 void java_lang_invoke_CallSite::compute_offsets() {
3724 InstanceKlass* k = SystemDictionary::CallSite_klass();
3725 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3726 }
3727
3728 #if INCLUDE_CDS
3729 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3730 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3731 }
3732 #endif
3733
3734 oop java_lang_invoke_CallSite::context(oop call_site) {
3735 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3736
3737 oop dep_oop = call_site->obj_field(_context_offset);
3738 return dep_oop;
3739 }
3740
3741 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3742
3743 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3744
3745 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3746 InstanceKlass* k = SystemDictionary::Context_klass();
3747 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3748 }
3749
3750 #if INCLUDE_CDS
3751 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3752 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3753 }
3754 #endif
3755
3756 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3757 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3758 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset);
3759 DependencyContext dep_ctx(vmdeps_addr);
3760 return dep_ctx;
3761 }
3762
3763 // Support for java_security_AccessControlContext
3764
3765 int java_security_AccessControlContext::_context_offset = 0;
3766 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3767 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3768 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3769
3770 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3771 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3772 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3773 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3774 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3775
3776 void java_security_AccessControlContext::compute_offsets() {
3777 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3778 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3779 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3780 }
3781
3782 #if INCLUDE_CDS
3783 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3784 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3785 }
3786 #endif
3787
3788 bool java_security_AccessControlContext::is_authorized(Handle context) {
3789 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3790 assert(_isAuthorized_offset != -1, "should be set");
3791 return context->bool_field(_isAuthorized_offset) != 0;
3792 }
3793
3794 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3795 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3796 // Ensure klass is initialized
3797 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3798 // Allocate result
3799 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3800 // Fill in values
3801 result->obj_field_put(_context_offset, context());
3802 result->obj_field_put(_privilegedContext_offset, privileged_context());
3803 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3804 // whitelist AccessControlContexts created by the JVM if present
3805 if (_isAuthorized_offset != -1) {
3806 result->bool_field_put(_isAuthorized_offset, true);
3807 }
3808 return result;
3809 }
3810
3811
3812 // Support for java_lang_ClassLoader
3813
3814 bool java_lang_ClassLoader::offsets_computed = false;
3815 int java_lang_ClassLoader::_loader_data_offset = -1;
3816 int java_lang_ClassLoader::parallelCapable_offset = -1;
3817 int java_lang_ClassLoader::name_offset = -1;
3818 int java_lang_ClassLoader::nameAndId_offset = -1;
3819 int java_lang_ClassLoader::unnamedModule_offset = -1;
3820
3821 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3822 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3823 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3824 }
3825
3826 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3827 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3828 return RawAccess<>::load_at(loader, _loader_data_offset);
3829 }
3830
3831 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3832 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3833 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3834 }
3835
3836 #define CLASSLOADER_FIELDS_DO(macro) \
3837 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3838 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3839 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3840 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3841 macro(parent_offset, k1, "parent", classloader_signature, false)
3842
3843 void java_lang_ClassLoader::compute_offsets() {
3844 assert(!offsets_computed, "offsets should be initialized only once");
3845 offsets_computed = true;
3846
3847 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3848 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3849
3850 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3851 }
3852
3853 #if INCLUDE_CDS
3854 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3855 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3856 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3857 }
3858 #endif
3859
3860 oop java_lang_ClassLoader::parent(oop loader) {
3861 assert(is_instance(loader), "loader must be oop");
3862 return loader->obj_field(parent_offset);
3863 }
3864
3865 // Returns the name field of this class loader. If the name field has not
3866 // been set, null will be returned.
3867 oop java_lang_ClassLoader::name(oop loader) {
3868 assert(is_instance(loader), "loader must be oop");
3869 return loader->obj_field(name_offset);
3870 }
3871
3872 // Returns the nameAndId field of this class loader. The format is
3873 // as follows:
3874 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3875 // If the defining loader has no name then <qualified-class-name> @<id>
3876 // If built-in loader, then omit '@<id>' as there is only one instance.
3877 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3878 oop java_lang_ClassLoader::nameAndId(oop loader) {
3879 assert(is_instance(loader), "loader must be oop");
3880 return loader->obj_field(nameAndId_offset);
3881 }
3882
3883 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3884 assert(is_instance(loader), "loader must be oop");
3885 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3886 oop acl = loader;
3887 debug_only(jint loop_count = 0);
3888 // This loop taken verbatim from ClassLoader.java:
3889 do {
3890 acl = parent(acl);
3891 if (oopDesc::equals(cl, acl)) {
3892 return true;
3893 }
3894 assert(++loop_count > 0, "loop_count overflow");
3895 } while (acl != NULL);
3896 return false;
3897 }
3898
3899 bool java_lang_ClassLoader::is_instance(oop obj) {
3900 return obj != NULL && is_subclass(obj->klass());
3901 }
3902
3903
3904 // For class loader classes, parallelCapable defined
3905 // based on non-null field
3906 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3907 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3908 if (parallelCapable_offset == -1) {
3909 // Default for backward compatibility is false
3910 return false;
3911 }
3912 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3913 }
3914
3915 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3916 // Fix for 4474172; see evaluation for more details
3917 loader = non_reflection_class_loader(loader);
3918
3919 oop cl = SystemDictionary::java_system_loader();
3920 while(cl != NULL) {
3921 if (oopDesc::equals(cl, loader)) return true;
3922 cl = parent(cl);
3923 }
3924 return false;
3925 }
3926
3927 // Return true if this is one of the class loaders associated with
3928 // the generated bytecodes for reflection.
3929 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3930 if (loader != NULL) {
3931 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3932 // This might be null in non-1.4 JDKs
3933 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3934 }
3935 return false;
3936 }
3937
3938 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3939 // See whether this is one of the class loaders associated with
3940 // the generated bytecodes for reflection, and if so, "magically"
3941 // delegate to its parent to prevent class loading from occurring
3942 // in places where applications using reflection didn't expect it.
3943 if (is_reflection_class_loader(loader)) {
3944 return parent(loader);
3945 }
3946 return loader;
3947 }
3948
3949 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3950 assert(is_instance(loader), "loader must be oop");
3951 return loader->obj_field(unnamedModule_offset);
3952 }
3953
3954 // Support for java_lang_System
3955 //
3956 #define SYSTEM_FIELDS_DO(macro) \
3957 macro(static_in_offset, k, "in", input_stream_signature, true); \
3958 macro(static_out_offset, k, "out", print_stream_signature, true); \
3959 macro(static_err_offset, k, "err", print_stream_signature, true); \
3960 macro(static_security_offset, k, "security", security_manager_signature, true)
3961
3962 void java_lang_System::compute_offsets() {
3963 InstanceKlass* k = SystemDictionary::System_klass();
3964 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3965 }
3966
3967 #if INCLUDE_CDS
3968 void java_lang_System::serialize_offsets(SerializeClosure* f) {
3969 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3970 }
3971 #endif
3972
3973 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
3974 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
3975 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
3976
3977
3978 bool java_lang_System::has_security_manager() {
3979 InstanceKlass* ik = SystemDictionary::System_klass();
3980 oop base = ik->static_field_base_raw();
3981 return base->obj_field(static_security_offset) != NULL;
3982 }
3983
3984 int java_lang_Class::_klass_offset;
3985 int java_lang_Class::_array_klass_offset;
3986 int java_lang_Class::_oop_size_offset;
3987 int java_lang_Class::_static_oop_field_count_offset;
3988 int java_lang_Class::_class_loader_offset;
3989 int java_lang_Class::_module_offset;
3990 int java_lang_Class::_protection_domain_offset;
3991 int java_lang_Class::_component_mirror_offset;
3992 int java_lang_Class::_init_lock_offset;
3993 int java_lang_Class::_signers_offset;
3994 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3995 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
3996 int java_lang_Throwable::backtrace_offset;
3997 int java_lang_Throwable::detailMessage_offset;
3998 int java_lang_Throwable::stackTrace_offset;
3999 int java_lang_Throwable::depth_offset;
4000 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4001 int java_lang_reflect_AccessibleObject::override_offset;
4002 int java_lang_reflect_Method::clazz_offset;
4003 int java_lang_reflect_Method::name_offset;
4004 int java_lang_reflect_Method::returnType_offset;
4005 int java_lang_reflect_Method::parameterTypes_offset;
4006 int java_lang_reflect_Method::exceptionTypes_offset;
4007 int java_lang_reflect_Method::slot_offset;
4008 int java_lang_reflect_Method::modifiers_offset;
4009 int java_lang_reflect_Method::signature_offset;
4010 int java_lang_reflect_Method::annotations_offset;
4011 int java_lang_reflect_Method::parameter_annotations_offset;
4012 int java_lang_reflect_Method::annotation_default_offset;
4013 int java_lang_reflect_Constructor::clazz_offset;
4014 int java_lang_reflect_Constructor::parameterTypes_offset;
4015 int java_lang_reflect_Constructor::exceptionTypes_offset;
4016 int java_lang_reflect_Constructor::slot_offset;
4017 int java_lang_reflect_Constructor::modifiers_offset;
4018 int java_lang_reflect_Constructor::signature_offset;
4019 int java_lang_reflect_Constructor::annotations_offset;
4020 int java_lang_reflect_Constructor::parameter_annotations_offset;
4021 int java_lang_reflect_Field::clazz_offset;
4022 int java_lang_reflect_Field::name_offset;
4023 int java_lang_reflect_Field::type_offset;
4024 int java_lang_reflect_Field::slot_offset;
4025 int java_lang_reflect_Field::modifiers_offset;
4026 int java_lang_reflect_Field::signature_offset;
4027 int java_lang_reflect_Field::annotations_offset;
4028 int java_lang_reflect_Parameter::name_offset;
4029 int java_lang_reflect_Parameter::modifiers_offset;
4030 int java_lang_reflect_Parameter::index_offset;
4031 int java_lang_reflect_Parameter::executable_offset;
4032 int java_lang_boxing_object::value_offset;
4033 int java_lang_boxing_object::long_value_offset;
4034 int java_lang_ref_Reference::referent_offset;
4035 int java_lang_ref_Reference::queue_offset;
4036 int java_lang_ref_Reference::next_offset;
4037 int java_lang_ref_Reference::discovered_offset;
4038 int java_lang_ref_SoftReference::timestamp_offset;
4039 int java_lang_ref_SoftReference::static_clock_offset;
4040 int java_lang_ClassLoader::parent_offset;
4041 int java_lang_System::static_in_offset;
4042 int java_lang_System::static_out_offset;
4043 int java_lang_System::static_err_offset;
4044 int java_lang_System::static_security_offset;
4045 int java_lang_StackTraceElement::methodName_offset;
4046 int java_lang_StackTraceElement::fileName_offset;
4047 int java_lang_StackTraceElement::lineNumber_offset;
4048 int java_lang_StackTraceElement::moduleName_offset;
4049 int java_lang_StackTraceElement::moduleVersion_offset;
4050 int java_lang_StackTraceElement::classLoaderName_offset;
4051 int java_lang_StackTraceElement::declaringClass_offset;
4052 int java_lang_StackTraceElement::declaringClassObject_offset;
4053 int java_lang_StackFrameInfo::_memberName_offset;
4054 int java_lang_StackFrameInfo::_bci_offset;
4055 int java_lang_StackFrameInfo::_version_offset;
4056 int java_lang_LiveStackFrameInfo::_monitors_offset;
4057 int java_lang_LiveStackFrameInfo::_locals_offset;
4058 int java_lang_LiveStackFrameInfo::_operands_offset;
4059 int java_lang_LiveStackFrameInfo::_mode_offset;
4060 int java_lang_AssertionStatusDirectives::classes_offset;
4061 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4062 int java_lang_AssertionStatusDirectives::packages_offset;
4063 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4064 int java_lang_AssertionStatusDirectives::deflt_offset;
4065 int java_nio_Buffer::_limit_offset;
4066 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4067 int reflect_ConstantPool::_oop_offset;
4068 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4069
4070
4071 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4072 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4073 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4074 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4075 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4076 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4077 macro(methodName_offset, k, "methodName", string_signature, false); \
4078 macro(fileName_offset, k, "fileName", string_signature, false); \
4079 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4080
4081 // Support for java_lang_StackTraceElement
4082 void java_lang_StackTraceElement::compute_offsets() {
4083 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4084 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4085 }
4086
4087 #if INCLUDE_CDS
4088 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4089 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4090 }
4091 #endif
4092
4093 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4094 element->obj_field_put(fileName_offset, value);
4095 }
4096
4097 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4098 element->obj_field_put(declaringClass_offset, value);
4099 }
4100
4101 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4102 element->obj_field_put(methodName_offset, value);
4103 }
4104
4105 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4106 element->int_field_put(lineNumber_offset, value);
4107 }
4108
4109 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4110 element->obj_field_put(moduleName_offset, value);
4111 }
4112
4113 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4114 element->obj_field_put(moduleVersion_offset, value);
4115 }
4116
4117 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4118 element->obj_field_put(classLoaderName_offset, value);
4119 }
4120
4121 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4122 element->obj_field_put(declaringClassObject_offset, value);
4123 }
4124
4125 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4126 element->short_field_put(_version_offset, value);
4127 }
4128
4129 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4130 element->int_field_put(_bci_offset, value);
4131 }
4132
4133 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4134 element->obj_field_put(_monitors_offset, value);
4135 }
4136
4137 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4138 element->obj_field_put(_locals_offset, value);
4139 }
4140
4141 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4142 element->obj_field_put(_operands_offset, value);
4143 }
4144
4145 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4146 element->int_field_put(_mode_offset, value);
4147 }
4148
4149 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4150 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4151 macro(classes_offset, k, "classes", string_array_signature, false); \
4152 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4153 macro(packages_offset, k, "packages", string_array_signature, false); \
4154 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4155 macro(deflt_offset, k, "deflt", bool_signature, false)
4156
4157 void java_lang_AssertionStatusDirectives::compute_offsets() {
4158 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4159 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4160 }
4161
4162 #if INCLUDE_CDS
4163 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4164 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4165 }
4166 #endif
4167
4168 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4169 o->obj_field_put(classes_offset, val);
4170 }
4171
4172 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4173 o->obj_field_put(classEnabled_offset, val);
4174 }
4175
4176 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4177 o->obj_field_put(packages_offset, val);
4178 }
4179
4180 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4181 o->obj_field_put(packageEnabled_offset, val);
4182 }
4183
4184 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4185 o->bool_field_put(deflt_offset, val);
4186 }
4187
4188
4189 // Support for intrinsification of java.nio.Buffer.checkIndex
4190 int java_nio_Buffer::limit_offset() {
4191 return _limit_offset;
4192 }
4193
4194 #define BUFFER_FIELDS_DO(macro) \
4195 macro(_limit_offset, k, "limit", int_signature, false)
4196
4197 void java_nio_Buffer::compute_offsets() {
4198 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4199 assert(k != NULL, "must be loaded in 1.4+");
4200 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4201 }
4202
4203 #if INCLUDE_CDS
4204 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4205 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4206 }
4207 #endif
4208
4209 #define AOS_FIELDS_DO(macro) \
4210 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4211
4212 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4213 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4214 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4215 }
4216
4217 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4218 assert(_owner_offset != 0, "Must be initialized");
4219 return obj->obj_field(_owner_offset);
4220 }
4221
4222 #if INCLUDE_CDS
4223 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4224 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4225 }
4226 #endif
4227
4228 static int member_offset(int hardcoded_offset) {
4229 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4230 }
4231
4232 // Compute hard-coded offsets
4233 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4234 // are not available to determine the offset_of_static_fields.
4235 void JavaClasses::compute_hard_coded_offsets() {
4236
4237 // java_lang_boxing_object
4238 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4239 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4240
4241 // java_lang_ref_Reference
4242 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4243 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4244 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4245 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4246 }
4247
4248 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4249
4250 // Compute non-hard-coded field offsets of all the classes in this file
4251 void JavaClasses::compute_offsets() {
4252 if (UseSharedSpaces) {
4253 return; // field offsets are loaded from archive
4254 }
4255
4256 // We have already called the compute_offsets() of the
4257 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4258 // earlier inside SystemDictionary::resolve_preloaded_classes()
4259 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4260
4261 // generated interpreter code wants to know about the offsets we just computed:
4262 AbstractAssembler::update_delayed_values();
4263 }
4264
4265 #if INCLUDE_CDS
4266 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4267
4268 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4269 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4270 }
4271 #endif
4272
4273
4274 #ifndef PRODUCT
4275
4276 // These functions exist to assert the validity of hard-coded field offsets to guard
4277 // against changes in the class files
4278
4279 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4280 EXCEPTION_MARK;
4281 fieldDescriptor fd;
4282 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4283 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4284 InstanceKlass* ik = InstanceKlass::cast(k);
4285 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4286 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4287 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4288 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4289 return false;
4290 }
4291 if (fd.is_static()) {
4292 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4293 return false;
4294 }
4295 if (fd.offset() == hardcoded_offset ) {
4296 return true;
4297 } else {
4298 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4299 klass_name, field_name, hardcoded_offset, fd.offset());
4300 return false;
4301 }
4302 }
4303
4304 // Check the hard-coded field offsets of all the classes in this file
4305
4306 void JavaClasses::check_offsets() {
4307 bool valid = true;
4308
4309 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4310 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4311
4312 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4313 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4314
4315 // Boxed primitive objects (java_lang_boxing_object)
4316
4317 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4318 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4319 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4320 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4321 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4322 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4323 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4324 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4325
4326 // java.lang.ref.Reference
4327
4328 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4329 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4330 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4331 // Fake field
4332 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4333
4334 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4335 }
4336
4337 #endif // PRODUCT
4338
4339 int InjectedField::compute_offset() {
4340 InstanceKlass* ik = InstanceKlass::cast(klass());
4341 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4342 if (!may_be_java && !fs.access_flags().is_internal()) {
4343 // Only look at injected fields
4344 continue;
4345 }
4346 if (fs.name() == name() && fs.signature() == signature()) {
4347 return fs.offset();
4348 }
4349 }
4350 ResourceMark rm;
4351 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)" : "");
4352 #ifndef PRODUCT
4353 ik->print();
4354 tty->print_cr("all fields:");
4355 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4356 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4357 }
4358 #endif //PRODUCT
4359 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
4360 return -1;
4361 }
4362
4363 void javaClasses_init() {
4364 JavaClasses::compute_offsets();
4365 JavaClasses::check_offsets();
4366 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4367 }