1 /*
2 * Copyright (c) 1997, 2019, 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/symbolTable.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "code/debugInfo.hpp"
34 #include "code/dependencyContext.hpp"
35 #include "code/pcDesc.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/heapShared.inline.hpp"
41 #include "memory/metaspaceShared.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/fieldStreams.hpp"
46 #include "oops/instanceKlass.hpp"
47 #include "oops/instanceMirrorKlass.hpp"
48 #include "oops/klass.hpp"
49 #include "oops/method.inline.hpp"
50 #include "oops/objArrayOop.inline.hpp"
51 #include "oops/oop.inline.hpp"
52 #include "oops/symbol.hpp"
53 #include "oops/typeArrayOop.inline.hpp"
54 #include "prims/jvmtiExport.hpp"
55 #include "prims/resolvedMethodTable.hpp"
56 #include "runtime/fieldDescriptor.inline.hpp"
57 #include "runtime/frame.inline.hpp"
58 #include "runtime/handles.inline.hpp"
59 #include "runtime/interfaceSupport.inline.hpp"
60 #include "runtime/java.hpp"
61 #include "runtime/javaCalls.hpp"
62 #include "runtime/jniHandles.inline.hpp"
63 #include "runtime/safepoint.hpp"
64 #include "runtime/safepointVerifiers.hpp"
65 #include "runtime/thread.inline.hpp"
66 #include "runtime/vframe.inline.hpp"
67 #include "utilities/align.hpp"
68 #include "utilities/preserveException.hpp"
69 #include "utilities/utf8.hpp"
70 #if INCLUDE_JVMCI
71 #include "jvmci/jvmciJavaClasses.hpp"
72 #endif
73
74 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
75 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
76
77 #if INCLUDE_CDS
78 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
79 f->do_u4((u4*)&_##name##_offset);
80 #endif
81
82 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
83 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
84
85 InjectedField JavaClasses::_injected_fields[] = {
86 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
87 };
88
compute_injected_offset(InjectedFieldID id)89 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
90 return _injected_fields[id].compute_offset();
91 }
92
get_injected(Symbol * class_name,int * field_count)93 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
94 *field_count = 0;
95
96 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
97 if (sid == vmSymbols::NO_SID) {
98 // Only well known classes can inject fields
99 return NULL;
100 }
101
102 int count = 0;
103 int start = -1;
104
105 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
106 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
107 count++; \
108 if (start == -1) start = klass##_##name##_enum; \
109 }
110 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
111 #undef LOOKUP_INJECTED_FIELD
112
113 if (start != -1) {
114 *field_count = count;
115 return _injected_fields + start;
116 }
117 return NULL;
118 }
119
120
121 // Helpful routine for computing field offsets at run time rather than hardcoding them
122 // Finds local fields only, including static fields. Static field offsets are from the
123 // beginning of the mirror.
compute_offset(int & dest_offset,InstanceKlass * ik,Symbol * name_symbol,Symbol * signature_symbol,bool is_static=false)124 static void compute_offset(int &dest_offset,
125 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
126 bool is_static = false) {
127 fieldDescriptor fd;
128 if (ik == NULL) {
129 ResourceMark rm;
130 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
131 vm_exit_during_initialization("Invalid layout of well-known class");
132 }
133
134 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
135 ResourceMark rm;
136 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
137 name_symbol->as_C_string(), signature_symbol->as_C_string());
138 #ifndef PRODUCT
139 // Prints all fields and offsets
140 Log(class) lt;
141 LogStream ls(lt.error());
142 ik->print_on(&ls);
143 #endif //PRODUCT
144 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
145 }
146 dest_offset = fd.offset();
147 }
148
149 // Overloading to pass name as a string.
compute_offset(int & dest_offset,InstanceKlass * ik,const char * name_string,Symbol * signature_symbol,bool is_static=false)150 static void compute_offset(int& dest_offset, InstanceKlass* ik,
151 const char* name_string, Symbol* signature_symbol,
152 bool is_static = false) {
153 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
154 if (name == NULL) {
155 ResourceMark rm;
156 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
157 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
158 }
159 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
160 }
161
162 int java_lang_String::value_offset = 0;
163 int java_lang_String::hash_offset = 0;
164 int java_lang_String::hashIsZero_offset = 0;
165 int java_lang_String::coder_offset = 0;
166
167 bool java_lang_String::initialized = false;
168
is_instance(oop obj)169 bool java_lang_String::is_instance(oop obj) {
170 return is_instance_inlined(obj);
171 }
172
173 #if INCLUDE_CDS
174 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
175 f->do_u4((u4*)&offset)
176 #endif
177
178 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
179 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
180
181 #define STRING_FIELDS_DO(macro) \
182 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
183 macro(hash_offset, k, "hash", int_signature, false); \
184 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
185 macro(coder_offset, k, "coder", byte_signature, false);
186
compute_offsets()187 void java_lang_String::compute_offsets() {
188 if (initialized) {
189 return;
190 }
191
192 InstanceKlass* k = SystemDictionary::String_klass();
193 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
194
195 initialized = true;
196 }
197
198 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)199 void java_lang_String::serialize_offsets(SerializeClosure* f) {
200 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
201 f->do_bool(&initialized);
202 }
203 #endif
204
205 class CompactStringsFixup : public FieldClosure {
206 private:
207 bool _value;
208
209 public:
CompactStringsFixup(bool value)210 CompactStringsFixup(bool value) : _value(value) {}
211
do_field(fieldDescriptor * fd)212 void do_field(fieldDescriptor* fd) {
213 if (fd->name() == vmSymbols::compact_strings_name()) {
214 oop mirror = fd->field_holder()->java_mirror();
215 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
216 assert(mirror != NULL, "String must have mirror already");
217 mirror->bool_field_put(fd->offset(), _value);
218 }
219 }
220 };
221
set_compact_strings(bool value)222 void java_lang_String::set_compact_strings(bool value) {
223 CompactStringsFixup fix(value);
224 SystemDictionary::String_klass()->do_local_static_fields(&fix);
225 }
226
basic_create(int length,bool is_latin1,TRAPS)227 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
228 assert(initialized, "Must be initialized");
229 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
230
231 // Create the String object first, so there's a chance that the String
232 // and the char array it points to end up in the same cache line.
233 oop obj;
234 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
235
236 // Create the char array. The String object must be handlized here
237 // because GC can happen as a result of the allocation attempt.
238 Handle h_obj(THREAD, obj);
239 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
240 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
241
242 // Point the String at the char array
243 obj = h_obj();
244 set_value(obj, buffer);
245 // No need to zero the offset, allocation zero'ed the entire String object
246 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
247 return h_obj;
248 }
249
create_from_unicode(const jchar * unicode,int length,TRAPS)250 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
251 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
252 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
253 typeArrayOop buffer = value(h_obj());
254 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
255 if (is_latin1) {
256 for (int index = 0; index < length; index++) {
257 buffer->byte_at_put(index, (jbyte)unicode[index]);
258 }
259 } else {
260 for (int index = 0; index < length; index++) {
261 buffer->char_at_put(index, unicode[index]);
262 }
263 }
264
265 #ifdef ASSERT
266 {
267 ResourceMark rm;
268 char* expected = UNICODE::as_utf8(unicode, length);
269 char* actual = as_utf8_string(h_obj());
270 if (strcmp(expected, actual) != 0) {
271 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
272 ShouldNotReachHere();
273 }
274 }
275 #endif
276
277 return h_obj;
278 }
279
create_oop_from_unicode(const jchar * unicode,int length,TRAPS)280 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
281 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
282 return h_obj();
283 }
284
create_from_str(const char * utf8_str,TRAPS)285 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
286 if (utf8_str == NULL) {
287 return Handle();
288 }
289 bool has_multibyte, is_latin1;
290 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
291 if (!CompactStrings) {
292 has_multibyte = true;
293 is_latin1 = false;
294 }
295
296 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
297 if (length > 0) {
298 if (!has_multibyte) {
299 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
300 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
301 } else if (is_latin1) {
302 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
303 } else {
304 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
305 }
306 }
307
308 #ifdef ASSERT
309 // This check is too strict because the input string is not necessarily valid UTF8.
310 // For example, it may be created with arbitrary content via jni_NewStringUTF.
311 /*
312 {
313 ResourceMark rm;
314 const char* expected = utf8_str;
315 char* actual = as_utf8_string(h_obj());
316 if (strcmp(expected, actual) != 0) {
317 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
318 ShouldNotReachHere();
319 }
320 }
321 */
322 #endif
323
324 return h_obj;
325 }
326
create_oop_from_str(const char * utf8_str,TRAPS)327 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
328 Handle h_obj = create_from_str(utf8_str, CHECK_0);
329 return h_obj();
330 }
331
create_from_symbol(Symbol * symbol,TRAPS)332 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
333 const char* utf8_str = (char*)symbol->bytes();
334 int utf8_len = symbol->utf8_length();
335
336 bool has_multibyte, is_latin1;
337 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
338 if (!CompactStrings) {
339 has_multibyte = true;
340 is_latin1 = false;
341 }
342
343 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
344 if (length > 0) {
345 if (!has_multibyte) {
346 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
347 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
348 } else if (is_latin1) {
349 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
350 } else {
351 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
352 }
353 }
354
355 #ifdef ASSERT
356 {
357 ResourceMark rm;
358 const char* expected = symbol->as_utf8();
359 char* actual = as_utf8_string(h_obj());
360 if (strncmp(expected, actual, utf8_len) != 0) {
361 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
362 ShouldNotReachHere();
363 }
364 }
365 #endif
366
367 return h_obj;
368 }
369
370 // Converts a C string to a Java String based on current encoding
create_from_platform_dependent_str(const char * str,TRAPS)371 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
372 assert(str != NULL, "bad arguments");
373
374 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
375 static to_java_string_fn_t _to_java_string_fn = NULL;
376
377 if (_to_java_string_fn == NULL) {
378 void *lib_handle = os::native_java_library();
379 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
380 if (_to_java_string_fn == NULL) {
381 fatal("NewStringPlatform missing");
382 }
383 }
384
385 jstring js = NULL;
386 { JavaThread* thread = (JavaThread*)THREAD;
387 assert(thread->is_Java_thread(), "must be java thread");
388 HandleMark hm(thread);
389 ThreadToNativeFromVM ttn(thread);
390 js = (_to_java_string_fn)(thread->jni_environment(), str);
391 }
392 return Handle(THREAD, JNIHandles::resolve(js));
393 }
394
395 // Converts a Java String to a native C string that can be used for
396 // native OS calls.
as_platform_dependent_str(Handle java_string,TRAPS)397 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
398 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
399 static to_platform_string_fn_t _to_platform_string_fn = NULL;
400
401 if (_to_platform_string_fn == NULL) {
402 void *lib_handle = os::native_java_library();
403 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
404 if (_to_platform_string_fn == NULL) {
405 fatal("GetStringPlatformChars missing");
406 }
407 }
408
409 char *native_platform_string;
410 { JavaThread* thread = (JavaThread*)THREAD;
411 assert(thread->is_Java_thread(), "must be java thread");
412 JNIEnv *env = thread->jni_environment();
413 jstring js = (jstring) JNIHandles::make_local(env, java_string());
414 bool is_copy;
415 HandleMark hm(thread);
416 ThreadToNativeFromVM ttn(thread);
417 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
418 assert(is_copy == JNI_TRUE, "is_copy value changed");
419 JNIHandles::destroy_local(js);
420 }
421 return native_platform_string;
422 }
423
char_converter(Handle java_string,jchar from_char,jchar to_char,TRAPS)424 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
425 oop obj = java_string();
426 // Typical usage is to convert all '/' to '.' in string.
427 typeArrayOop value = java_lang_String::value(obj);
428 int length = java_lang_String::length(obj, value);
429 bool is_latin1 = java_lang_String::is_latin1(obj);
430
431 // First check if any from_char exist
432 int index; // Declared outside, used later
433 for (index = 0; index < length; index++) {
434 jchar c = !is_latin1 ? value->char_at(index) :
435 ((jchar) value->byte_at(index)) & 0xff;
436 if (c == from_char) {
437 break;
438 }
439 }
440 if (index == length) {
441 // No from_char, so do not copy.
442 return java_string;
443 }
444
445 // Check if result string will be latin1
446 bool to_is_latin1 = false;
447
448 // Replacement char must be latin1
449 if (CompactStrings && UNICODE::is_latin1(to_char)) {
450 if (is_latin1) {
451 // Source string is latin1 as well
452 to_is_latin1 = true;
453 } else if (!UNICODE::is_latin1(from_char)) {
454 // We are replacing an UTF16 char. Scan string to
455 // check if result can be latin1 encoded.
456 to_is_latin1 = true;
457 for (index = 0; index < length; index++) {
458 jchar c = value->char_at(index);
459 if (c != from_char && !UNICODE::is_latin1(c)) {
460 to_is_latin1 = false;
461 break;
462 }
463 }
464 }
465 }
466
467 // Create new UNICODE (or byte) buffer. Must handlize value because GC
468 // may happen during String and char array creation.
469 typeArrayHandle h_value(THREAD, value);
470 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
471 typeArrayOop from_buffer = h_value();
472 typeArrayOop to_buffer = java_lang_String::value(string());
473
474 // Copy contents
475 for (index = 0; index < length; index++) {
476 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
477 ((jchar) from_buffer->byte_at(index)) & 0xff;
478 if (c == from_char) {
479 c = to_char;
480 }
481 if (!to_is_latin1) {
482 to_buffer->char_at_put(index, c);
483 } else {
484 to_buffer->byte_at_put(index, (jbyte) c);
485 }
486 }
487 return string;
488 }
489
as_unicode_string(oop java_string,int & length,TRAPS)490 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
491 typeArrayOop value = java_lang_String::value(java_string);
492 length = java_lang_String::length(java_string, value);
493 bool is_latin1 = java_lang_String::is_latin1(java_string);
494
495 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
496 if (result != NULL) {
497 if (!is_latin1) {
498 for (int index = 0; index < length; index++) {
499 result[index] = value->char_at(index);
500 }
501 } else {
502 for (int index = 0; index < length; index++) {
503 result[index] = ((jchar) value->byte_at(index)) & 0xff;
504 }
505 }
506 } else {
507 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
508 }
509 return result;
510 }
511
hash_code(oop java_string)512 unsigned int java_lang_String::hash_code(oop java_string) {
513 // The hash and hashIsZero fields are subject to a benign data race,
514 // making it crucial to ensure that any observable result of the
515 // calculation in this method stays correct under any possible read of
516 // these fields. Necessary restrictions to allow this to be correct
517 // without explicit memory fences or similar concurrency primitives is
518 // that we can ever only write to one of these two fields for a given
519 // String instance, and that the computation is idempotent and derived
520 // from immutable state
521 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized");
522 if (java_lang_String::hash_is_set(java_string)) {
523 return java_string->int_field(hash_offset);
524 }
525
526 typeArrayOop value = java_lang_String::value(java_string);
527 int length = java_lang_String::length(java_string, value);
528 bool is_latin1 = java_lang_String::is_latin1(java_string);
529
530 unsigned int hash = 0;
531 if (length > 0) {
532 if (is_latin1) {
533 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
534 } else {
535 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
536 }
537 }
538
539 if (hash != 0) {
540 java_string->int_field_put(hash_offset, hash);
541 } else {
542 java_string->bool_field_put(hashIsZero_offset, true);
543 }
544 return hash;
545 }
546
as_quoted_ascii(oop java_string)547 char* java_lang_String::as_quoted_ascii(oop java_string) {
548 typeArrayOop value = java_lang_String::value(java_string);
549 int length = java_lang_String::length(java_string, value);
550 bool is_latin1 = java_lang_String::is_latin1(java_string);
551
552 if (length == 0) return NULL;
553
554 char* result;
555 int result_length;
556 if (!is_latin1) {
557 jchar* base = value->char_at_addr(0);
558 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
559 result = NEW_RESOURCE_ARRAY(char, result_length);
560 UNICODE::as_quoted_ascii(base, length, result, result_length);
561 } else {
562 jbyte* base = value->byte_at_addr(0);
563 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
564 result = NEW_RESOURCE_ARRAY(char, result_length);
565 UNICODE::as_quoted_ascii(base, length, result, result_length);
566 }
567 assert(result_length >= length + 1, "must not be shorter");
568 assert(result_length == (int)strlen(result) + 1, "must match");
569 return result;
570 }
571
as_symbol(oop java_string)572 Symbol* java_lang_String::as_symbol(oop java_string) {
573 typeArrayOop value = java_lang_String::value(java_string);
574 int length = java_lang_String::length(java_string, value);
575 bool is_latin1 = java_lang_String::is_latin1(java_string);
576 if (!is_latin1) {
577 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
578 Symbol* sym = SymbolTable::new_symbol(base, length);
579 return sym;
580 } else {
581 ResourceMark rm;
582 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
583 const char* base = UNICODE::as_utf8(position, length);
584 Symbol* sym = SymbolTable::new_symbol(base, length);
585 return sym;
586 }
587 }
588
as_symbol_or_null(oop java_string)589 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
590 typeArrayOop value = java_lang_String::value(java_string);
591 int length = java_lang_String::length(java_string, value);
592 bool is_latin1 = java_lang_String::is_latin1(java_string);
593 if (!is_latin1) {
594 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
595 return SymbolTable::probe_unicode(base, length);
596 } else {
597 ResourceMark rm;
598 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
599 const char* base = UNICODE::as_utf8(position, length);
600 return SymbolTable::probe(base, length);
601 }
602 }
603
utf8_length(oop java_string,typeArrayOop value)604 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
605 assert(value_equals(value, java_lang_String::value(java_string)),
606 "value must be same as java_lang_String::value(java_string)");
607 int length = java_lang_String::length(java_string, value);
608 if (length == 0) {
609 return 0;
610 }
611 if (!java_lang_String::is_latin1(java_string)) {
612 return UNICODE::utf8_length(value->char_at_addr(0), length);
613 } else {
614 return UNICODE::utf8_length(value->byte_at_addr(0), length);
615 }
616 }
617
utf8_length(oop java_string)618 int java_lang_String::utf8_length(oop java_string) {
619 typeArrayOop value = java_lang_String::value(java_string);
620 return utf8_length(java_string, value);
621 }
622
as_utf8_string(oop java_string)623 char* java_lang_String::as_utf8_string(oop java_string) {
624 typeArrayOop value = java_lang_String::value(java_string);
625 int length = java_lang_String::length(java_string, value);
626 bool is_latin1 = java_lang_String::is_latin1(java_string);
627 if (!is_latin1) {
628 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
629 return UNICODE::as_utf8(position, length);
630 } else {
631 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
632 return UNICODE::as_utf8(position, length);
633 }
634 }
635
as_utf8_string(oop java_string,typeArrayOop value,char * buf,int buflen)636 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
637 assert(value_equals(value, java_lang_String::value(java_string)),
638 "value must be same as java_lang_String::value(java_string)");
639 int length = java_lang_String::length(java_string, value);
640 bool is_latin1 = java_lang_String::is_latin1(java_string);
641 if (!is_latin1) {
642 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
643 return UNICODE::as_utf8(position, length, buf, buflen);
644 } else {
645 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
646 return UNICODE::as_utf8(position, length, buf, buflen);
647 }
648 }
649
as_utf8_string(oop java_string,char * buf,int buflen)650 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
651 typeArrayOop value = java_lang_String::value(java_string);
652 return as_utf8_string(java_string, value, buf, buflen);
653 }
654
as_utf8_string(oop java_string,int start,int len)655 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
656 typeArrayOop value = java_lang_String::value(java_string);
657 bool is_latin1 = java_lang_String::is_latin1(java_string);
658 assert(start + len <= java_lang_String::length(java_string), "just checking");
659 if (!is_latin1) {
660 jchar* position = value->char_at_addr(start);
661 return UNICODE::as_utf8(position, len);
662 } else {
663 jbyte* position = value->byte_at_addr(start);
664 return UNICODE::as_utf8(position, len);
665 }
666 }
667
as_utf8_string(oop java_string,typeArrayOop value,int start,int len,char * buf,int buflen)668 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
669 assert(value_equals(value, java_lang_String::value(java_string)),
670 "value must be same as java_lang_String::value(java_string)");
671 assert(start + len <= java_lang_String::length(java_string), "just checking");
672 bool is_latin1 = java_lang_String::is_latin1(java_string);
673 if (!is_latin1) {
674 jchar* position = value->char_at_addr(start);
675 return UNICODE::as_utf8(position, len, buf, buflen);
676 } else {
677 jbyte* position = value->byte_at_addr(start);
678 return UNICODE::as_utf8(position, len, buf, buflen);
679 }
680 }
681
equals(oop java_string,const jchar * chars,int len)682 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
683 assert(java_string->klass() == SystemDictionary::String_klass(),
684 "must be java_string");
685 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
686 int length = java_lang_String::length(java_string, value);
687 if (length != len) {
688 return false;
689 }
690 bool is_latin1 = java_lang_String::is_latin1(java_string);
691 if (!is_latin1) {
692 for (int i = 0; i < len; i++) {
693 if (value->char_at(i) != chars[i]) {
694 return false;
695 }
696 }
697 } else {
698 for (int i = 0; i < len; i++) {
699 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
700 return false;
701 }
702 }
703 }
704 return true;
705 }
706
equals(oop str1,oop str2)707 bool java_lang_String::equals(oop str1, oop str2) {
708 assert(str1->klass() == SystemDictionary::String_klass(),
709 "must be java String");
710 assert(str2->klass() == SystemDictionary::String_klass(),
711 "must be java String");
712 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
713 bool is_latin1 = java_lang_String::is_latin1(str1);
714 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
715 bool is_latin2 = java_lang_String::is_latin1(str2);
716
717 if (is_latin1 != is_latin2) {
718 // Strings with different coders are never equal.
719 return false;
720 }
721 return value_equals(value1, value2);
722 }
723
print(oop java_string,outputStream * st)724 void java_lang_String::print(oop java_string, outputStream* st) {
725 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
726 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
727
728 if (value == NULL) {
729 // This can happen if, e.g., printing a String
730 // object before its initializer has been called
731 st->print("NULL");
732 return;
733 }
734
735 int length = java_lang_String::length(java_string, value);
736 bool is_latin1 = java_lang_String::is_latin1(java_string);
737
738 st->print("\"");
739 for (int index = 0; index < length; index++) {
740 st->print("%c", (!is_latin1) ? value->char_at(index) :
741 ((jchar) value->byte_at(index)) & 0xff );
742 }
743 st->print("\"");
744 }
745
746
initialize_static_field(fieldDescriptor * fd,Handle mirror,TRAPS)747 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
748 assert(mirror.not_null() && fd->is_static(), "just checking");
749 if (fd->has_initial_value()) {
750 BasicType t = fd->field_type();
751 switch (t) {
752 case T_BYTE:
753 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
754 break;
755 case T_BOOLEAN:
756 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
757 break;
758 case T_CHAR:
759 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
760 break;
761 case T_SHORT:
762 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
763 break;
764 case T_INT:
765 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
766 break;
767 case T_FLOAT:
768 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
769 break;
770 case T_DOUBLE:
771 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
772 break;
773 case T_LONG:
774 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
775 break;
776 case T_OBJECT:
777 {
778 assert(fd->signature() == vmSymbols::string_signature(),
779 "just checking");
780 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
781 // Archive the String field and update the pointer.
782 oop s = mirror()->obj_field(fd->offset());
783 oop archived_s = StringTable::create_archived_string(s, CHECK);
784 mirror()->obj_field_put(fd->offset(), archived_s);
785 } else {
786 oop string = fd->string_initial_value(CHECK);
787 mirror()->obj_field_put(fd->offset(), string);
788 }
789 }
790 break;
791 default:
792 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
793 "Illegal ConstantValue attribute in class file");
794 }
795 }
796 }
797
798
fixup_mirror(Klass * k,TRAPS)799 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
800 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
801
802 // If the offset was read from the shared archive, it was fixed up already
803 if (!k->is_shared()) {
804 if (k->is_instance_klass()) {
805 // During bootstrap, java.lang.Class wasn't loaded so static field
806 // offsets were computed without the size added it. Go back and
807 // update all the static field offsets to included the size.
808 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
809 if (fs.access_flags().is_static()) {
810 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
811 fs.set_offset(real_offset);
812 }
813 }
814 }
815 }
816
817 if (k->is_shared() && k->has_raw_archived_mirror()) {
818 if (HeapShared::open_archive_heap_region_mapped()) {
819 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
820 assert(present, "Missing archived mirror for %s", k->external_name());
821 return;
822 } else {
823 k->set_java_mirror_handle(NULL);
824 k->clear_has_raw_archived_mirror();
825 }
826 }
827 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
828 }
829
initialize_mirror_fields(Klass * k,Handle mirror,Handle protection_domain,TRAPS)830 void java_lang_Class::initialize_mirror_fields(Klass* k,
831 Handle mirror,
832 Handle protection_domain,
833 TRAPS) {
834 // Allocate a simple java object for a lock.
835 // This needs to be a java object because during class initialization
836 // it can be held across a java call.
837 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
838 set_init_lock(mirror(), r);
839
840 // Set protection domain also
841 set_protection_domain(mirror(), protection_domain());
842
843 // Initialize static fields
844 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
845 }
846
847 // Set the java.lang.Module module field in the java_lang_Class mirror
set_mirror_module_field(Klass * k,Handle mirror,Handle module,TRAPS)848 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
849 if (module.is_null()) {
850 // During startup, the module may be NULL only if java.base has not been defined yet.
851 // Put the class on the fixup_module_list to patch later when the java.lang.Module
852 // for java.base is known. But note that since we captured the NULL module another
853 // thread may have completed that initialization.
854
855 bool javabase_was_defined = false;
856 {
857 MutexLocker m1(Module_lock, THREAD);
858 // Keep list of classes needing java.base module fixup
859 if (!ModuleEntryTable::javabase_defined()) {
860 assert(k->java_mirror() != NULL, "Class's mirror is null");
861 k->class_loader_data()->inc_keep_alive();
862 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
863 fixup_module_field_list()->push(k);
864 } else {
865 javabase_was_defined = true;
866 }
867 }
868
869 // If java.base was already defined then patch this particular class with java.base.
870 if (javabase_was_defined) {
871 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
872 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
873 "Setting class module field, " JAVA_BASE_NAME " should be defined");
874 Handle javabase_handle(THREAD, javabase_entry->module());
875 set_module(mirror(), javabase_handle());
876 }
877 } else {
878 assert(Universe::is_module_initialized() ||
879 (ModuleEntryTable::javabase_defined() &&
880 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
881 "Incorrect java.lang.Module specification while creating mirror");
882 set_module(mirror(), module());
883 }
884 }
885
886 // Statically allocate fixup lists because they always get created.
allocate_fixup_lists()887 void java_lang_Class::allocate_fixup_lists() {
888 GrowableArray<Klass*>* mirror_list =
889 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
890 set_fixup_mirror_list(mirror_list);
891
892 GrowableArray<Klass*>* module_list =
893 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
894 set_fixup_module_field_list(module_list);
895 }
896
create_mirror(Klass * k,Handle class_loader,Handle module,Handle protection_domain,TRAPS)897 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
898 Handle module, Handle protection_domain, TRAPS) {
899 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
900 assert(k->java_mirror() == NULL, "should only assign mirror once");
901
902 // Use this moment of initialization to cache modifier_flags also,
903 // to support Class.getModifiers(). Instance classes recalculate
904 // the cached flags after the class file is parsed, but before the
905 // class is put into the system dictionary.
906 int computed_modifiers = k->compute_modifier_flags(CHECK);
907 k->set_modifier_flags(computed_modifiers);
908 // Class_klass has to be loaded because it is used to allocate
909 // the mirror.
910 if (SystemDictionary::Class_klass_loaded()) {
911 // Allocate mirror (java.lang.Class instance)
912 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
913 Handle mirror(THREAD, mirror_oop);
914 Handle comp_mirror;
915
916 // Setup indirection from mirror->klass
917 java_lang_Class::set_klass(mirror(), k);
918
919 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
920 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
921
922 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
923
924 // It might also have a component mirror. This mirror must already exist.
925 if (k->is_array_klass()) {
926 if (k->is_typeArray_klass()) {
927 BasicType type = TypeArrayKlass::cast(k)->element_type();
928 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
929 } else {
930 assert(k->is_objArray_klass(), "Must be");
931 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
932 assert(element_klass != NULL, "Must have an element klass");
933 comp_mirror = Handle(THREAD, element_klass->java_mirror());
934 }
935 assert(comp_mirror() != NULL, "must have a mirror");
936
937 // Two-way link between the array klass and its component mirror:
938 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
939 set_component_mirror(mirror(), comp_mirror());
940 // See below for ordering dependencies between field array_klass in component mirror
941 // and java_mirror in this klass.
942 } else {
943 assert(k->is_instance_klass(), "Must be");
944
945 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
946 if (HAS_PENDING_EXCEPTION) {
947 // If any of the fields throws an exception like OOM remove the klass field
948 // from the mirror so GC doesn't follow it after the klass has been deallocated.
949 // This mirror looks like a primitive type, which logically it is because it
950 // it represents no class.
951 java_lang_Class::set_klass(mirror(), NULL);
952 return;
953 }
954 }
955
956 // set the classLoader field in the java_lang_Class instance
957 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
958 set_class_loader(mirror(), class_loader());
959
960 // Setup indirection from klass->mirror
961 // after any exceptions can happen during allocations.
962 k->set_java_mirror(mirror);
963
964 // Set the module field in the java_lang_Class instance. This must be done
965 // after the mirror is set.
966 set_mirror_module_field(k, mirror, module, THREAD);
967
968 if (comp_mirror() != NULL) {
969 // Set after k->java_mirror() is published, because compiled code running
970 // concurrently doesn't expect a k to have a null java_mirror.
971 release_set_array_klass(comp_mirror(), k);
972 }
973 } else {
974 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
975 fixup_mirror_list()->push(k);
976 }
977 }
978
979 #if INCLUDE_CDS_JAVA_HEAP
980 // Clears mirror fields. Static final fields with initial values are reloaded
981 // from constant pool. The object identity hash is in the object header and is
982 // not affected.
983 class ResetMirrorField: public FieldClosure {
984 private:
985 Handle _m;
986
987 public:
ResetMirrorField(Handle mirror)988 ResetMirrorField(Handle mirror) : _m(mirror) {}
989
do_field(fieldDescriptor * fd)990 void do_field(fieldDescriptor* fd) {
991 assert(DumpSharedSpaces, "dump time only");
992 assert(_m.not_null(), "Mirror cannot be NULL");
993
994 if (fd->is_static() && fd->has_initial_value()) {
995 initialize_static_field(fd, _m, Thread::current());
996 return;
997 }
998
999 BasicType ft = fd->field_type();
1000 switch (ft) {
1001 case T_BYTE:
1002 _m()->byte_field_put(fd->offset(), 0);
1003 break;
1004 case T_CHAR:
1005 _m()->char_field_put(fd->offset(), 0);
1006 break;
1007 case T_DOUBLE:
1008 _m()->double_field_put(fd->offset(), 0);
1009 break;
1010 case T_FLOAT:
1011 _m()->float_field_put(fd->offset(), 0);
1012 break;
1013 case T_INT:
1014 _m()->int_field_put(fd->offset(), 0);
1015 break;
1016 case T_LONG:
1017 _m()->long_field_put(fd->offset(), 0);
1018 break;
1019 case T_SHORT:
1020 _m()->short_field_put(fd->offset(), 0);
1021 break;
1022 case T_BOOLEAN:
1023 _m()->bool_field_put(fd->offset(), false);
1024 break;
1025 case T_ARRAY:
1026 case T_OBJECT: {
1027 // It might be useful to cache the String field, but
1028 // for now just clear out any reference field
1029 oop o = _m()->obj_field(fd->offset());
1030 _m()->obj_field_put(fd->offset(), NULL);
1031 break;
1032 }
1033 default:
1034 ShouldNotReachHere();
1035 break;
1036 }
1037 }
1038 };
1039
archive_basic_type_mirrors(TRAPS)1040 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1041 assert(HeapShared::is_heap_object_archiving_allowed(),
1042 "HeapShared::is_heap_object_archiving_allowed() must be true");
1043
1044 for (int t = 0; t <= T_VOID; t++) {
1045 oop m = Universe::_mirrors[t];
1046 if (m != NULL) {
1047 // Update the field at _array_klass_offset to point to the relocated array klass.
1048 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1049 assert(archived_m != NULL, "sanity");
1050 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1051 assert(ak != NULL || t == T_VOID, "should not be NULL");
1052 if (ak != NULL) {
1053 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1054 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1055 }
1056
1057 // Clear the fields. Just to be safe
1058 Klass *k = m->klass();
1059 Handle archived_mirror_h(THREAD, archived_m);
1060 ResetMirrorField reset(archived_mirror_h);
1061 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1062
1063 log_trace(cds, heap, mirror)(
1064 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1065 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1066
1067 Universe::_mirrors[t] = archived_m;
1068 }
1069 }
1070
1071 assert(Universe::_mirrors[T_INT] != NULL &&
1072 Universe::_mirrors[T_FLOAT] != NULL &&
1073 Universe::_mirrors[T_DOUBLE] != NULL &&
1074 Universe::_mirrors[T_BYTE] != NULL &&
1075 Universe::_mirrors[T_BOOLEAN] != NULL &&
1076 Universe::_mirrors[T_CHAR] != NULL &&
1077 Universe::_mirrors[T_LONG] != NULL &&
1078 Universe::_mirrors[T_SHORT] != NULL &&
1079 Universe::_mirrors[T_VOID] != NULL, "sanity");
1080
1081 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1082 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1083 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1084 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1085 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1086 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1087 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1088 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1089 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1090 }
1091
1092 //
1093 // After the mirror object is successfully archived, the archived
1094 // klass is set with _has_archived_raw_mirror flag.
1095 //
1096 // The _has_archived_raw_mirror flag is cleared at runtime when the
1097 // archived mirror is restored. If archived java heap data cannot
1098 // be used at runtime, new mirror object is created for the shared
1099 // class. The _has_archived_raw_mirror is cleared also during the process.
archive_mirror(Klass * k,TRAPS)1100 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1101 assert(HeapShared::is_heap_object_archiving_allowed(),
1102 "HeapShared::is_heap_object_archiving_allowed() must be true");
1103
1104 // Mirror is already archived
1105 if (k->has_raw_archived_mirror()) {
1106 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1107 return k->archived_java_mirror_raw();
1108 }
1109
1110 // No mirror
1111 oop mirror = k->java_mirror();
1112 if (mirror == NULL) {
1113 return NULL;
1114 }
1115
1116 if (k->is_instance_klass()) {
1117 InstanceKlass *ik = InstanceKlass::cast(k);
1118 assert(ik->signers() == NULL, "class with signer should have been excluded");
1119
1120 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1121 ik->is_shared_app_class())) {
1122 // Archiving mirror for classes from non-builtin loaders is not
1123 // supported. Clear the _java_mirror within the archived class.
1124 k->set_java_mirror_handle(NULL);
1125 return NULL;
1126 }
1127 }
1128
1129 // Now start archiving the mirror object
1130 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1131 if (archived_mirror == NULL) {
1132 return NULL;
1133 }
1134
1135 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1136 if (archived_mirror == NULL) {
1137 return NULL;
1138 }
1139
1140 k->set_archived_java_mirror_raw(archived_mirror);
1141
1142 k->set_has_raw_archived_mirror();
1143
1144 ResourceMark rm;
1145 log_trace(cds, heap, mirror)(
1146 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1147 k->external_name(), p2i(mirror), p2i(archived_mirror));
1148
1149 return archived_mirror;
1150 }
1151
1152 // The process is based on create_mirror().
process_archived_mirror(Klass * k,oop mirror,oop archived_mirror,Thread * THREAD)1153 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1154 oop archived_mirror,
1155 Thread *THREAD) {
1156 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1157 // to archived metadata and objects below.
1158 Klass *c = archived_mirror->klass();
1159 Handle archived_mirror_h(THREAD, archived_mirror);
1160 ResetMirrorField reset(archived_mirror_h);
1161 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1162
1163 if (k->is_array_klass()) {
1164 oop archived_comp_mirror;
1165 if (k->is_typeArray_klass()) {
1166 // The primitive type mirrors are already archived. Get the archived mirror.
1167 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1168 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1169 assert(archived_comp_mirror != NULL, "Must be");
1170 } else {
1171 assert(k->is_objArray_klass(), "Must be");
1172 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1173 assert(element_klass != NULL, "Must have an element klass");
1174 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1175 if (archived_comp_mirror == NULL) {
1176 return NULL;
1177 }
1178 }
1179 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1180 } else {
1181 assert(k->is_instance_klass(), "Must be");
1182
1183 // Reset local static fields in the mirror
1184 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1185
1186 java_lang_Class:set_init_lock(archived_mirror, NULL);
1187
1188 set_protection_domain(archived_mirror, NULL);
1189 }
1190
1191 // clear class loader and mirror_module_field
1192 set_class_loader(archived_mirror, NULL);
1193 set_module(archived_mirror, NULL);
1194
1195 // The archived mirror's field at _klass_offset is still pointing to the original
1196 // klass. Updated the field in the archived mirror to point to the relocated
1197 // klass in the archive.
1198 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1199 log_debug(cds, heap, mirror)(
1200 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1201 p2i(as_Klass(mirror)), p2i(reloc_k));
1202 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1203
1204 // The field at _array_klass_offset is pointing to the original one dimension
1205 // higher array klass if exists. Relocate the pointer.
1206 Klass *arr = array_klass_acquire(mirror);
1207 if (arr != NULL) {
1208 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1209 log_debug(cds, heap, mirror)(
1210 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1211 p2i(arr), p2i(reloc_arr));
1212 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1213 }
1214 return archived_mirror;
1215 }
1216
1217 // Returns true if the mirror is updated, false if no archived mirror
1218 // data is present. After the archived mirror object is restored, the
1219 // shared klass' _has_raw_archived_mirror flag is cleared.
restore_archived_mirror(Klass * k,Handle class_loader,Handle module,Handle protection_domain,TRAPS)1220 bool java_lang_Class::restore_archived_mirror(Klass *k,
1221 Handle class_loader, Handle module,
1222 Handle protection_domain, TRAPS) {
1223 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1224 // see more details in SystemDictionary::resolve_well_known_classes().
1225 if (!SystemDictionary::Class_klass_loaded()) {
1226 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1227 fixup_mirror_list()->push(k);
1228 return true;
1229 }
1230
1231 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1232
1233 if (m == NULL) {
1234 return false;
1235 }
1236
1237 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1238
1239 // mirror is archived, restore
1240 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1241 Handle mirror(THREAD, m);
1242
1243 if (!k->is_array_klass()) {
1244 // - local static final fields with initial values were initialized at dump time
1245
1246 // create the init_lock
1247 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1248 set_init_lock(mirror(), r);
1249
1250 if (protection_domain.not_null()) {
1251 set_protection_domain(mirror(), protection_domain());
1252 }
1253 }
1254
1255 assert(class_loader() == k->class_loader(), "should be same");
1256 if (class_loader.not_null()) {
1257 set_class_loader(mirror(), class_loader());
1258 }
1259
1260 k->set_java_mirror(mirror);
1261 k->clear_has_raw_archived_mirror();
1262
1263 set_mirror_module_field(k, mirror, module, THREAD);
1264
1265 ResourceMark rm;
1266 log_trace(cds, heap, mirror)(
1267 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1268
1269 return true;
1270 }
1271 #endif // INCLUDE_CDS_JAVA_HEAP
1272
fixup_module_field(Klass * k,Handle module)1273 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1274 assert(_module_offset != 0, "must have been computed already");
1275 java_lang_Class::set_module(k->java_mirror(), module());
1276 }
1277
oop_size(oop java_class)1278 int java_lang_Class::oop_size(oop java_class) {
1279 assert(_oop_size_offset != 0, "must be set");
1280 int size = java_class->int_field(_oop_size_offset);
1281 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1282 return size;
1283 }
1284
1285
set_oop_size(HeapWord * java_class,int size)1286 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1287 assert(_oop_size_offset != 0, "must be set");
1288 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1289 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1290 }
1291
static_oop_field_count(oop java_class)1292 int java_lang_Class::static_oop_field_count(oop java_class) {
1293 assert(_static_oop_field_count_offset != 0, "must be set");
1294 return java_class->int_field(_static_oop_field_count_offset);
1295 }
1296
static_oop_field_count_raw(oop java_class)1297 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1298 assert(_static_oop_field_count_offset != 0, "must be set");
1299 return java_class->int_field_raw(_static_oop_field_count_offset);
1300 }
1301
set_static_oop_field_count(oop java_class,int size)1302 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1303 assert(_static_oop_field_count_offset != 0, "must be set");
1304 java_class->int_field_put(_static_oop_field_count_offset, size);
1305 }
1306
protection_domain(oop java_class)1307 oop java_lang_Class::protection_domain(oop java_class) {
1308 assert(_protection_domain_offset != 0, "must be set");
1309 return java_class->obj_field(_protection_domain_offset);
1310 }
set_protection_domain(oop java_class,oop pd)1311 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1312 assert(_protection_domain_offset != 0, "must be set");
1313 java_class->obj_field_put(_protection_domain_offset, pd);
1314 }
1315
set_component_mirror(oop java_class,oop comp_mirror)1316 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1317 assert(_component_mirror_offset != 0, "must be set");
1318 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1319 }
component_mirror(oop java_class)1320 oop java_lang_Class::component_mirror(oop java_class) {
1321 assert(_component_mirror_offset != 0, "must be set");
1322 return java_class->obj_field(_component_mirror_offset);
1323 }
1324
init_lock(oop java_class)1325 oop java_lang_Class::init_lock(oop java_class) {
1326 assert(_init_lock_offset != 0, "must be set");
1327 return java_class->obj_field(_init_lock_offset);
1328 }
set_init_lock(oop java_class,oop init_lock)1329 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1330 assert(_init_lock_offset != 0, "must be set");
1331 java_class->obj_field_put(_init_lock_offset, init_lock);
1332 }
1333
signers(oop java_class)1334 objArrayOop java_lang_Class::signers(oop java_class) {
1335 assert(_signers_offset != 0, "must be set");
1336 return (objArrayOop)java_class->obj_field(_signers_offset);
1337 }
set_signers(oop java_class,objArrayOop signers)1338 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1339 assert(_signers_offset != 0, "must be set");
1340 java_class->obj_field_put(_signers_offset, (oop)signers);
1341 }
1342
1343
set_class_loader(oop java_class,oop loader)1344 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1345 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1346 if (_class_loader_offset != 0) {
1347 java_class->obj_field_put(_class_loader_offset, loader);
1348 }
1349 }
1350
class_loader(oop java_class)1351 oop java_lang_Class::class_loader(oop java_class) {
1352 assert(_class_loader_offset != 0, "must be set");
1353 return java_class->obj_field(_class_loader_offset);
1354 }
1355
module(oop java_class)1356 oop java_lang_Class::module(oop java_class) {
1357 assert(_module_offset != 0, "must be set");
1358 return java_class->obj_field(_module_offset);
1359 }
1360
set_module(oop java_class,oop module)1361 void java_lang_Class::set_module(oop java_class, oop module) {
1362 assert(_module_offset != 0, "must be set");
1363 java_class->obj_field_put(_module_offset, module);
1364 }
1365
name(Handle java_class,TRAPS)1366 oop java_lang_Class::name(Handle java_class, TRAPS) {
1367 assert(_name_offset != 0, "must be set");
1368 oop o = java_class->obj_field(_name_offset);
1369 if (o == NULL) {
1370 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1371 java_class->obj_field_put(_name_offset, o);
1372 }
1373 return o;
1374 }
1375
source_file(oop java_class)1376 oop java_lang_Class::source_file(oop java_class) {
1377 assert(_source_file_offset != 0, "must be set");
1378 return java_class->obj_field(_source_file_offset);
1379 }
1380
set_source_file(oop java_class,oop source_file)1381 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1382 assert(_source_file_offset != 0, "must be set");
1383 java_class->obj_field_put(_source_file_offset, source_file);
1384 }
1385
create_basic_type_mirror(const char * basic_type_name,BasicType type,TRAPS)1386 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1387 // This should be improved by adding a field at the Java level or by
1388 // introducing a new VM klass (see comment in ClassFileParser)
1389 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1390 if (type != T_VOID) {
1391 Klass* aklass = Universe::typeArrayKlassObj(type);
1392 assert(aklass != NULL, "correct bootstrap");
1393 release_set_array_klass(java_class, aklass);
1394 }
1395 #ifdef ASSERT
1396 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1397 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1398 #endif
1399 return java_class;
1400 }
1401
1402
as_Klass(oop java_class)1403 Klass* java_lang_Class::as_Klass(oop java_class) {
1404 //%note memory_2
1405 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1406 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1407 assert(k == NULL || k->is_klass(), "type check");
1408 return k;
1409 }
1410
as_Klass_raw(oop java_class)1411 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1412 //%note memory_2
1413 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1414 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1415 assert(k == NULL || k->is_klass(), "type check");
1416 return k;
1417 }
1418
1419
set_klass(oop java_class,Klass * klass)1420 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1421 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1422 java_class->metadata_field_put(_klass_offset, klass);
1423 }
1424
1425
print_signature(oop java_class,outputStream * st)1426 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1427 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1428 Symbol* name = NULL;
1429 bool is_instance = false;
1430 if (is_primitive(java_class)) {
1431 name = vmSymbols::type_signature(primitive_type(java_class));
1432 } else {
1433 Klass* k = as_Klass(java_class);
1434 is_instance = k->is_instance_klass();
1435 name = k->name();
1436 }
1437 if (name == NULL) {
1438 st->print("<null>");
1439 return;
1440 }
1441 if (is_instance) st->print("L");
1442 st->write((char*) name->base(), (int) name->utf8_length());
1443 if (is_instance) st->print(";");
1444 }
1445
as_signature(oop java_class,bool intern_if_not_found)1446 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1447 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1448 Symbol* name;
1449 if (is_primitive(java_class)) {
1450 name = vmSymbols::type_signature(primitive_type(java_class));
1451 // Because this can create a new symbol, the caller has to decrement
1452 // the refcount, so make adjustment here and below for symbols returned
1453 // that are not created or incremented due to a successful lookup.
1454 name->increment_refcount();
1455 } else {
1456 Klass* k = as_Klass(java_class);
1457 if (!k->is_instance_klass()) {
1458 name = k->name();
1459 name->increment_refcount();
1460 } else {
1461 ResourceMark rm;
1462 const char* sigstr = k->signature_name();
1463 int siglen = (int) strlen(sigstr);
1464 if (!intern_if_not_found) {
1465 name = SymbolTable::probe(sigstr, siglen);
1466 } else {
1467 name = SymbolTable::new_symbol(sigstr, siglen);
1468 }
1469 }
1470 }
1471 return name;
1472 }
1473
1474 // Returns the Java name for this Java mirror (Resource allocated)
1475 // See Klass::external_name().
1476 // For primitive type Java mirrors, its type name is returned.
as_external_name(oop java_class)1477 const char* java_lang_Class::as_external_name(oop java_class) {
1478 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1479 const char* name = NULL;
1480 if (is_primitive(java_class)) {
1481 name = type2name(primitive_type(java_class));
1482 } else {
1483 name = as_Klass(java_class)->external_name();
1484 }
1485 if (name == NULL) {
1486 name = "<null>";
1487 }
1488 return name;
1489 }
1490
array_klass_acquire(oop java_class)1491 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1492 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1493 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1494 return k;
1495 }
1496
1497
release_set_array_klass(oop java_class,Klass * klass)1498 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1499 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1500 java_class->release_metadata_field_put(_array_klass_offset, klass);
1501 }
1502
1503
primitive_type(oop java_class)1504 BasicType java_lang_Class::primitive_type(oop java_class) {
1505 assert(java_lang_Class::is_primitive(java_class), "just checking");
1506 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1507 BasicType type = T_VOID;
1508 if (ak != NULL) {
1509 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1510 type = ArrayKlass::cast(ak)->element_type();
1511 } else {
1512 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1513 }
1514 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1515 return type;
1516 }
1517
as_BasicType(oop java_class,Klass ** reference_klass)1518 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1519 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1520 if (is_primitive(java_class)) {
1521 if (reference_klass != NULL)
1522 (*reference_klass) = NULL;
1523 return primitive_type(java_class);
1524 } else {
1525 if (reference_klass != NULL)
1526 (*reference_klass) = as_Klass(java_class);
1527 return T_OBJECT;
1528 }
1529 }
1530
1531
primitive_mirror(BasicType t)1532 oop java_lang_Class::primitive_mirror(BasicType t) {
1533 oop mirror = Universe::java_mirror(t);
1534 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1535 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1536 return mirror;
1537 }
1538
1539 bool java_lang_Class::offsets_computed = false;
1540 int java_lang_Class::classRedefinedCount_offset = -1;
1541
1542 #define CLASS_FIELDS_DO(macro) \
1543 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1544 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1545 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1546 macro(_module_offset, k, "module", module_signature, false); \
1547 macro(_name_offset, k, "name", string_signature, false); \
1548
compute_offsets()1549 void java_lang_Class::compute_offsets() {
1550 if (offsets_computed) {
1551 return;
1552 }
1553
1554 offsets_computed = true;
1555
1556 InstanceKlass* k = SystemDictionary::Class_klass();
1557 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1558
1559 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1560 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1561 // GC treats them the same.
1562 _init_lock_offset = _component_mirror_offset;
1563
1564 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1565 }
1566
1567 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)1568 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1569 f->do_bool(&offsets_computed);
1570 f->do_u4((u4*)&_init_lock_offset);
1571
1572 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1573
1574 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1575 }
1576 #endif
1577
classRedefinedCount(oop the_class_mirror)1578 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1579 if (classRedefinedCount_offset == -1) {
1580 // If we don't have an offset for it then just return -1 as a marker.
1581 return -1;
1582 }
1583
1584 return the_class_mirror->int_field(classRedefinedCount_offset);
1585 }
1586
set_classRedefinedCount(oop the_class_mirror,int value)1587 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1588 if (classRedefinedCount_offset == -1) {
1589 // If we don't have an offset for it then nothing to set.
1590 return;
1591 }
1592
1593 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1594 }
1595
1596
1597 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1598 // platform thread structure, and a eetop offset which was used for thread
1599 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1600 // merged, so in the HotSpot VM we just use the eetop field for the thread
1601 // instead of the privateInfo_offset.
1602 //
1603 // Note: The stackSize field is only present starting in 1.4.
1604
1605 int java_lang_Thread::_name_offset = 0;
1606 int java_lang_Thread::_group_offset = 0;
1607 int java_lang_Thread::_contextClassLoader_offset = 0;
1608 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1609 int java_lang_Thread::_priority_offset = 0;
1610 int java_lang_Thread::_eetop_offset = 0;
1611 int java_lang_Thread::_daemon_offset = 0;
1612 int java_lang_Thread::_stillborn_offset = 0;
1613 int java_lang_Thread::_stackSize_offset = 0;
1614 int java_lang_Thread::_tid_offset = 0;
1615 int java_lang_Thread::_thread_status_offset = 0;
1616 int java_lang_Thread::_park_blocker_offset = 0;
1617
1618 #define THREAD_FIELDS_DO(macro) \
1619 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1620 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1621 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1622 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1623 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1624 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1625 macro(_eetop_offset, k, "eetop", long_signature, false); \
1626 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1627 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1628 macro(_tid_offset, k, "tid", long_signature, false); \
1629 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1630 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false)
1631
compute_offsets()1632 void java_lang_Thread::compute_offsets() {
1633 assert(_group_offset == 0, "offsets should be initialized only once");
1634
1635 InstanceKlass* k = SystemDictionary::Thread_klass();
1636 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1637 }
1638
1639 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)1640 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1641 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1642 }
1643 #endif
1644
thread(oop java_thread)1645 JavaThread* java_lang_Thread::thread(oop java_thread) {
1646 return (JavaThread*)java_thread->address_field(_eetop_offset);
1647 }
1648
1649
set_thread(oop java_thread,JavaThread * thread)1650 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1651 java_thread->address_field_put(_eetop_offset, (address)thread);
1652 }
1653
1654
name(oop java_thread)1655 oop java_lang_Thread::name(oop java_thread) {
1656 return java_thread->obj_field(_name_offset);
1657 }
1658
1659
set_name(oop java_thread,oop name)1660 void java_lang_Thread::set_name(oop java_thread, oop name) {
1661 java_thread->obj_field_put(_name_offset, name);
1662 }
1663
1664
priority(oop java_thread)1665 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1666 return (ThreadPriority)java_thread->int_field(_priority_offset);
1667 }
1668
1669
set_priority(oop java_thread,ThreadPriority priority)1670 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1671 java_thread->int_field_put(_priority_offset, priority);
1672 }
1673
1674
threadGroup(oop java_thread)1675 oop java_lang_Thread::threadGroup(oop java_thread) {
1676 return java_thread->obj_field(_group_offset);
1677 }
1678
1679
is_stillborn(oop java_thread)1680 bool java_lang_Thread::is_stillborn(oop java_thread) {
1681 return java_thread->bool_field(_stillborn_offset) != 0;
1682 }
1683
1684
1685 // We never have reason to turn the stillborn bit off
set_stillborn(oop java_thread)1686 void java_lang_Thread::set_stillborn(oop java_thread) {
1687 java_thread->bool_field_put(_stillborn_offset, true);
1688 }
1689
1690
is_alive(oop java_thread)1691 bool java_lang_Thread::is_alive(oop java_thread) {
1692 JavaThread* thr = java_lang_Thread::thread(java_thread);
1693 return (thr != NULL);
1694 }
1695
1696
is_daemon(oop java_thread)1697 bool java_lang_Thread::is_daemon(oop java_thread) {
1698 return java_thread->bool_field(_daemon_offset) != 0;
1699 }
1700
1701
set_daemon(oop java_thread)1702 void java_lang_Thread::set_daemon(oop java_thread) {
1703 java_thread->bool_field_put(_daemon_offset, true);
1704 }
1705
context_class_loader(oop java_thread)1706 oop java_lang_Thread::context_class_loader(oop java_thread) {
1707 return java_thread->obj_field(_contextClassLoader_offset);
1708 }
1709
inherited_access_control_context(oop java_thread)1710 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1711 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1712 }
1713
1714
stackSize(oop java_thread)1715 jlong java_lang_Thread::stackSize(oop java_thread) {
1716 return java_thread->long_field(_stackSize_offset);
1717 }
1718
1719 // Write the thread status value to threadStatus field in java.lang.Thread java class.
set_thread_status(oop java_thread,java_lang_Thread::ThreadStatus status)1720 void java_lang_Thread::set_thread_status(oop java_thread,
1721 java_lang_Thread::ThreadStatus status) {
1722 java_thread->int_field_put(_thread_status_offset, status);
1723 }
1724
1725 // Read thread status value from threadStatus field in java.lang.Thread java class.
get_thread_status(oop java_thread)1726 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1727 // Make sure the caller is operating on behalf of the VM or is
1728 // running VM code (state == _thread_in_vm).
1729 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1730 JavaThread::current()->thread_state() == _thread_in_vm,
1731 "Java Thread is not running in vm");
1732 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1733 }
1734
1735
thread_id(oop java_thread)1736 jlong java_lang_Thread::thread_id(oop java_thread) {
1737 return java_thread->long_field(_tid_offset);
1738 }
1739
park_blocker(oop java_thread)1740 oop java_lang_Thread::park_blocker(oop java_thread) {
1741 return java_thread->obj_field(_park_blocker_offset);
1742 }
1743
thread_status_name(oop java_thread)1744 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1745 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1746 switch (status) {
1747 case NEW : return "NEW";
1748 case RUNNABLE : return "RUNNABLE";
1749 case SLEEPING : return "TIMED_WAITING (sleeping)";
1750 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1751 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1752 case PARKED : return "WAITING (parking)";
1753 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1754 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1755 case TERMINATED : return "TERMINATED";
1756 default : return "UNKNOWN";
1757 };
1758 }
1759 int java_lang_ThreadGroup::_parent_offset = 0;
1760 int java_lang_ThreadGroup::_name_offset = 0;
1761 int java_lang_ThreadGroup::_threads_offset = 0;
1762 int java_lang_ThreadGroup::_groups_offset = 0;
1763 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1764 int java_lang_ThreadGroup::_destroyed_offset = 0;
1765 int java_lang_ThreadGroup::_daemon_offset = 0;
1766 int java_lang_ThreadGroup::_nthreads_offset = 0;
1767 int java_lang_ThreadGroup::_ngroups_offset = 0;
1768
parent(oop java_thread_group)1769 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1770 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1771 return java_thread_group->obj_field(_parent_offset);
1772 }
1773
1774 // ("name as oop" accessor is not necessary)
1775
name(oop java_thread_group)1776 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1777 oop name = java_thread_group->obj_field(_name_offset);
1778 // ThreadGroup.name can be null
1779 if (name != NULL) {
1780 return java_lang_String::as_utf8_string(name);
1781 }
1782 return NULL;
1783 }
1784
nthreads(oop java_thread_group)1785 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1786 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1787 return java_thread_group->int_field(_nthreads_offset);
1788 }
1789
threads(oop java_thread_group)1790 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1791 oop threads = java_thread_group->obj_field(_threads_offset);
1792 assert(threads != NULL, "threadgroups should have threads");
1793 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1794 return objArrayOop(threads);
1795 }
1796
ngroups(oop java_thread_group)1797 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1798 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1799 return java_thread_group->int_field(_ngroups_offset);
1800 }
1801
groups(oop java_thread_group)1802 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1803 oop groups = java_thread_group->obj_field(_groups_offset);
1804 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1805 return objArrayOop(groups);
1806 }
1807
maxPriority(oop java_thread_group)1808 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1809 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1810 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1811 }
1812
is_destroyed(oop java_thread_group)1813 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1814 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1815 return java_thread_group->bool_field(_destroyed_offset) != 0;
1816 }
1817
is_daemon(oop java_thread_group)1818 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1819 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1820 return java_thread_group->bool_field(_daemon_offset) != 0;
1821 }
1822
1823 #define THREADGROUP_FIELDS_DO(macro) \
1824 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1825 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1826 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1827 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1828 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1829 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1830 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1831 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1832 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1833
compute_offsets()1834 void java_lang_ThreadGroup::compute_offsets() {
1835 assert(_parent_offset == 0, "offsets should be initialized only once");
1836
1837 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1838 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1839 }
1840
1841 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)1842 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1843 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1844 }
1845 #endif
1846
1847 #define THROWABLE_FIELDS_DO(macro) \
1848 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1849 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1850 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1851 macro(depth_offset, k, "depth", int_signature, false); \
1852 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1853
compute_offsets()1854 void java_lang_Throwable::compute_offsets() {
1855 InstanceKlass* k = SystemDictionary::Throwable_klass();
1856 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1857 }
1858
1859 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)1860 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1861 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1862 }
1863 #endif
1864
unassigned_stacktrace()1865 oop java_lang_Throwable::unassigned_stacktrace() {
1866 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1867 oop base = ik->static_field_base_raw();
1868 return base->obj_field(static_unassigned_stacktrace_offset);
1869 }
1870
backtrace(oop throwable)1871 oop java_lang_Throwable::backtrace(oop throwable) {
1872 return throwable->obj_field_acquire(backtrace_offset);
1873 }
1874
1875
set_backtrace(oop throwable,oop value)1876 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1877 throwable->release_obj_field_put(backtrace_offset, value);
1878 }
1879
depth(oop throwable)1880 int java_lang_Throwable::depth(oop throwable) {
1881 return throwable->int_field(depth_offset);
1882 }
1883
set_depth(oop throwable,int value)1884 void java_lang_Throwable::set_depth(oop throwable, int value) {
1885 throwable->int_field_put(depth_offset, value);
1886 }
1887
message(oop throwable)1888 oop java_lang_Throwable::message(oop throwable) {
1889 return throwable->obj_field(detailMessage_offset);
1890 }
1891
1892
1893 // Return Symbol for detailed_message or NULL
detail_message(oop throwable)1894 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1895 PRESERVE_EXCEPTION_MARK; // Keep original exception
1896 oop detailed_message = java_lang_Throwable::message(throwable);
1897 if (detailed_message != NULL) {
1898 return java_lang_String::as_symbol(detailed_message);
1899 }
1900 return NULL;
1901 }
1902
set_message(oop throwable,oop value)1903 void java_lang_Throwable::set_message(oop throwable, oop value) {
1904 throwable->obj_field_put(detailMessage_offset, value);
1905 }
1906
1907
set_stacktrace(oop throwable,oop st_element_array)1908 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1909 throwable->obj_field_put(stackTrace_offset, st_element_array);
1910 }
1911
clear_stacktrace(oop throwable)1912 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1913 set_stacktrace(throwable, NULL);
1914 }
1915
1916
print(oop throwable,outputStream * st)1917 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1918 ResourceMark rm;
1919 Klass* k = throwable->klass();
1920 assert(k != NULL, "just checking");
1921 st->print("%s", k->external_name());
1922 oop msg = message(throwable);
1923 if (msg != NULL) {
1924 st->print(": %s", java_lang_String::as_utf8_string(msg));
1925 }
1926 }
1927
1928 // After this many redefines, the stack trace is unreliable.
1929 const int MAX_VERSION = USHRT_MAX;
1930
version_matches(Method * method,int version)1931 static inline bool version_matches(Method* method, int version) {
1932 assert(version < MAX_VERSION, "version is too big");
1933 return method != NULL && (method->constants()->version() == version);
1934 }
1935
1936
1937 // This class provides a simple wrapper over the internal structure of
1938 // exception backtrace to insulate users of the backtrace from needing
1939 // to know what it looks like.
1940 class BacktraceBuilder: public StackObj {
1941 friend class BacktraceIterator;
1942 private:
1943 Handle _backtrace;
1944 objArrayOop _head;
1945 typeArrayOop _methods;
1946 typeArrayOop _bcis;
1947 objArrayOop _mirrors;
1948 typeArrayOop _names; // needed to insulate method name against redefinition
1949 int _index;
1950 NoSafepointVerifier _nsv;
1951
1952 enum {
1953 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1954 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1955 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1956 trace_names_offset = java_lang_Throwable::trace_names_offset,
1957 trace_next_offset = java_lang_Throwable::trace_next_offset,
1958 trace_size = java_lang_Throwable::trace_size,
1959 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1960 };
1961
1962 // get info out of chunks
get_methods(objArrayHandle chunk)1963 static typeArrayOop get_methods(objArrayHandle chunk) {
1964 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1965 assert(methods != NULL, "method array should be initialized in backtrace");
1966 return methods;
1967 }
get_bcis(objArrayHandle chunk)1968 static typeArrayOop get_bcis(objArrayHandle chunk) {
1969 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1970 assert(bcis != NULL, "bci array should be initialized in backtrace");
1971 return bcis;
1972 }
get_mirrors(objArrayHandle chunk)1973 static objArrayOop get_mirrors(objArrayHandle chunk) {
1974 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1975 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1976 return mirrors;
1977 }
get_names(objArrayHandle chunk)1978 static typeArrayOop get_names(objArrayHandle chunk) {
1979 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
1980 assert(names != NULL, "names array should be initialized in backtrace");
1981 return names;
1982 }
1983
1984 public:
1985
1986 // constructor for new backtrace
BacktraceBuilder(TRAPS)1987 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
1988 expand(CHECK);
1989 _backtrace = Handle(THREAD, _head);
1990 _index = 0;
1991 }
1992
BacktraceBuilder(Thread * thread,objArrayHandle backtrace)1993 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
1994 _methods = get_methods(backtrace);
1995 _bcis = get_bcis(backtrace);
1996 _mirrors = get_mirrors(backtrace);
1997 _names = get_names(backtrace);
1998 assert(_methods->length() == _bcis->length() &&
1999 _methods->length() == _mirrors->length() &&
2000 _mirrors->length() == _names->length(),
2001 "method and source information arrays should match");
2002
2003 // head is the preallocated backtrace
2004 _head = backtrace();
2005 _backtrace = Handle(thread, _head);
2006 _index = 0;
2007 }
2008
expand(TRAPS)2009 void expand(TRAPS) {
2010 objArrayHandle old_head(THREAD, _head);
2011 PauseNoSafepointVerifier pnsv(&_nsv);
2012
2013 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2014 objArrayHandle new_head(THREAD, head);
2015
2016 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2017 typeArrayHandle new_methods(THREAD, methods);
2018
2019 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2020 typeArrayHandle new_bcis(THREAD, bcis);
2021
2022 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2023 objArrayHandle new_mirrors(THREAD, mirrors);
2024
2025 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2026 typeArrayHandle new_names(THREAD, names);
2027
2028 if (!old_head.is_null()) {
2029 old_head->obj_at_put(trace_next_offset, new_head());
2030 }
2031 new_head->obj_at_put(trace_methods_offset, new_methods());
2032 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2033 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2034 new_head->obj_at_put(trace_names_offset, new_names());
2035
2036 _head = new_head();
2037 _methods = new_methods();
2038 _bcis = new_bcis();
2039 _mirrors = new_mirrors();
2040 _names = new_names();
2041 _index = 0;
2042 }
2043
backtrace()2044 oop backtrace() {
2045 return _backtrace();
2046 }
2047
push(Method * method,int bci,TRAPS)2048 inline void push(Method* method, int bci, TRAPS) {
2049 // Smear the -1 bci to 0 since the array only holds unsigned
2050 // shorts. The later line number lookup would just smear the -1
2051 // to a 0 even if it could be recorded.
2052 if (bci == SynchronizationEntryBCI) bci = 0;
2053
2054 if (_index >= trace_chunk_size) {
2055 methodHandle mhandle(THREAD, method);
2056 expand(CHECK);
2057 method = mhandle();
2058 }
2059
2060 _methods->ushort_at_put(_index, method->orig_method_idnum());
2061 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2062
2063 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2064 // klass owning the symbols alive so their refcounts aren't decremented.
2065 Symbol* name = method->name();
2066 _names->symbol_at_put(_index, name);
2067
2068 // We need to save the mirrors in the backtrace to keep the class
2069 // from being unloaded while we still have this stack trace.
2070 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2071 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2072 _index++;
2073 }
2074
2075 };
2076
2077 struct BacktraceElement : public StackObj {
2078 int _method_id;
2079 int _bci;
2080 int _version;
2081 Symbol* _name;
2082 Handle _mirror;
BacktraceElementBacktraceElement2083 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2084 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2085 };
2086
2087 class BacktraceIterator : public StackObj {
2088 int _index;
2089 objArrayHandle _result;
2090 objArrayHandle _mirrors;
2091 typeArrayHandle _methods;
2092 typeArrayHandle _bcis;
2093 typeArrayHandle _names;
2094
init(objArrayHandle result,Thread * thread)2095 void init(objArrayHandle result, Thread* thread) {
2096 // Get method id, bci, version and mirror from chunk
2097 _result = result;
2098 if (_result.not_null()) {
2099 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2100 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2101 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2102 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2103 _index = 0;
2104 }
2105 }
2106 public:
BacktraceIterator(objArrayHandle result,Thread * thread)2107 BacktraceIterator(objArrayHandle result, Thread* thread) {
2108 init(result, thread);
2109 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2110 }
2111
next(Thread * thread)2112 BacktraceElement next(Thread* thread) {
2113 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2114 _methods->ushort_at(_index),
2115 Backtrace::version_at(_bcis->int_at(_index)),
2116 Backtrace::bci_at(_bcis->int_at(_index)),
2117 _names->symbol_at(_index));
2118 _index++;
2119
2120 if (_index >= java_lang_Throwable::trace_chunk_size) {
2121 int next_offset = java_lang_Throwable::trace_next_offset;
2122 // Get next chunk
2123 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2124 init(result, thread);
2125 }
2126 return e;
2127 }
2128
repeat()2129 bool repeat() {
2130 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2131 }
2132 };
2133
2134
2135 // Print stack trace element to resource allocated buffer
print_stack_element_to_stream(outputStream * st,Handle mirror,int method_id,int version,int bci,Symbol * name)2136 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2137 int version, int bci, Symbol* name) {
2138 ResourceMark rm;
2139
2140 // Get strings and string lengths
2141 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2142 const char* klass_name = holder->external_name();
2143 int buf_len = (int)strlen(klass_name);
2144
2145 char* method_name = name->as_C_string();
2146 buf_len += (int)strlen(method_name);
2147
2148 char* source_file_name = NULL;
2149 Symbol* source = Backtrace::get_source_file_name(holder, version);
2150 if (source != NULL) {
2151 source_file_name = source->as_C_string();
2152 buf_len += (int)strlen(source_file_name);
2153 }
2154
2155 char *module_name = NULL, *module_version = NULL;
2156 ModuleEntry* module = holder->module();
2157 if (module->is_named()) {
2158 module_name = module->name()->as_C_string();
2159 buf_len += (int)strlen(module_name);
2160 if (module->version() != NULL) {
2161 module_version = module->version()->as_C_string();
2162 buf_len += (int)strlen(module_version);
2163 }
2164 }
2165
2166 // Allocate temporary buffer with extra space for formatting and line number
2167 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2168
2169 // Print stack trace line in buffer
2170 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2171
2172 // Print module information
2173 if (module_name != NULL) {
2174 if (module_version != NULL) {
2175 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2176 } else {
2177 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2178 }
2179 }
2180
2181 // The method can be NULL if the requested class version is gone
2182 Method* method = holder->method_with_orig_idnum(method_id, version);
2183 if (!version_matches(method, version)) {
2184 strcat(buf, "Redefined)");
2185 } else {
2186 int line_number = Backtrace::get_line_number(method, bci);
2187 if (line_number == -2) {
2188 strcat(buf, "Native Method)");
2189 } else {
2190 if (source_file_name != NULL && (line_number != -1)) {
2191 // Sourcename and linenumber
2192 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2193 } else if (source_file_name != NULL) {
2194 // Just sourcename
2195 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2196 } else {
2197 // Neither sourcename nor linenumber
2198 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2199 }
2200 CompiledMethod* nm = method->code();
2201 if (WizardMode && nm != NULL) {
2202 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2203 }
2204 }
2205 }
2206
2207 st->print_cr("%s", buf);
2208 }
2209
print_stack_element(outputStream * st,const methodHandle & method,int bci)2210 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2211 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2212 int method_id = method->orig_method_idnum();
2213 int version = method->constants()->version();
2214 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2215 }
2216
2217 /**
2218 * Print the throwable message and its stack trace plus all causes by walking the
2219 * cause chain. The output looks the same as of Throwable.printStackTrace().
2220 */
print_stack_trace(Handle throwable,outputStream * st)2221 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2222 // First, print the message.
2223 print(throwable(), st);
2224 st->cr();
2225
2226 // Now print the stack trace.
2227 Thread* THREAD = Thread::current();
2228 while (throwable.not_null()) {
2229 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2230 if (result.is_null()) {
2231 st->print_raw_cr("\t<<no stack trace available>>");
2232 return;
2233 }
2234 BacktraceIterator iter(result, THREAD);
2235
2236 while (iter.repeat()) {
2237 BacktraceElement bte = iter.next(THREAD);
2238 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2239 }
2240 {
2241 // Call getCause() which doesn't necessarily return the _cause field.
2242 EXCEPTION_MARK;
2243 JavaValue cause(T_OBJECT);
2244 JavaCalls::call_virtual(&cause,
2245 throwable,
2246 throwable->klass(),
2247 vmSymbols::getCause_name(),
2248 vmSymbols::void_throwable_signature(),
2249 THREAD);
2250 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2251 if (HAS_PENDING_EXCEPTION) {
2252 CLEAR_PENDING_EXCEPTION;
2253 throwable = Handle();
2254 } else {
2255 throwable = Handle(THREAD, (oop) cause.get_jobject());
2256 if (throwable.not_null()) {
2257 st->print("Caused by: ");
2258 print(throwable(), st);
2259 st->cr();
2260 }
2261 }
2262 }
2263 }
2264 }
2265
2266 /**
2267 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2268 */
java_printStackTrace(Handle throwable,TRAPS)2269 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2270 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2271 JavaValue result(T_VOID);
2272 JavaCalls::call_virtual(&result,
2273 throwable,
2274 SystemDictionary::Throwable_klass(),
2275 vmSymbols::printStackTrace_name(),
2276 vmSymbols::void_method_signature(),
2277 THREAD);
2278 }
2279
fill_in_stack_trace(Handle throwable,const methodHandle & method,TRAPS)2280 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2281 if (!StackTraceInThrowable) return;
2282 ResourceMark rm(THREAD);
2283
2284 // Start out by clearing the backtrace for this object, in case the VM
2285 // runs out of memory while allocating the stack trace
2286 set_backtrace(throwable(), NULL);
2287 // Clear lazily constructed Java level stacktrace if refilling occurs
2288 // This is unnecessary in 1.7+ but harmless
2289 clear_stacktrace(throwable());
2290
2291 int max_depth = MaxJavaStackTraceDepth;
2292 JavaThread* thread = (JavaThread*)THREAD;
2293
2294 BacktraceBuilder bt(CHECK);
2295
2296 // If there is no Java frame just return the method that was being called
2297 // with bci 0
2298 if (!thread->has_last_Java_frame()) {
2299 if (max_depth >= 1 && method() != NULL) {
2300 bt.push(method(), 0, CHECK);
2301 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2302 set_depth(throwable(), 1);
2303 set_backtrace(throwable(), bt.backtrace());
2304 }
2305 return;
2306 }
2307
2308 // Instead of using vframe directly, this version of fill_in_stack_trace
2309 // basically handles everything by hand. This significantly improved the
2310 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2311 // See bug 6333838 for more details.
2312 // The "ASSERT" here is to verify this method generates the exactly same stack
2313 // trace as utilizing vframe.
2314 #ifdef ASSERT
2315 vframeStream st(thread);
2316 methodHandle st_method(THREAD, st.method());
2317 #endif
2318 int total_count = 0;
2319 RegisterMap map(thread, false);
2320 int decode_offset = 0;
2321 CompiledMethod* nm = NULL;
2322 bool skip_fillInStackTrace_check = false;
2323 bool skip_throwableInit_check = false;
2324 bool skip_hidden = !ShowHiddenFrames;
2325
2326 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2327 Method* method = NULL;
2328 int bci = 0;
2329
2330 // Compiled java method case.
2331 if (decode_offset != 0) {
2332 DebugInfoReadStream stream(nm, decode_offset);
2333 decode_offset = stream.read_int();
2334 method = (Method*)nm->metadata_at(stream.read_int());
2335 bci = stream.read_bci();
2336 } else {
2337 if (fr.is_first_frame()) break;
2338 address pc = fr.pc();
2339 if (fr.is_interpreted_frame()) {
2340 address bcp = fr.interpreter_frame_bcp();
2341 method = fr.interpreter_frame_method();
2342 bci = method->bci_from(bcp);
2343 fr = fr.sender(&map);
2344 } else {
2345 CodeBlob* cb = fr.cb();
2346 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2347 // but non nmethod
2348 fr = fr.sender(&map);
2349 if (cb == NULL || !cb->is_compiled()) {
2350 continue;
2351 }
2352 nm = cb->as_compiled_method();
2353 if (nm->method()->is_native()) {
2354 method = nm->method();
2355 bci = 0;
2356 } else {
2357 PcDesc* pd = nm->pc_desc_at(pc);
2358 decode_offset = pd->scope_decode_offset();
2359 // if decode_offset is not equal to 0, it will execute the
2360 // "compiled java method case" at the beginning of the loop.
2361 continue;
2362 }
2363 }
2364 }
2365 #ifdef ASSERT
2366 assert(st_method() == method && st.bci() == bci,
2367 "Wrong stack trace");
2368 st.next();
2369 // vframeStream::method isn't GC-safe so store off a copy
2370 // of the Method* in case we GC.
2371 if (!st.at_end()) {
2372 st_method = st.method();
2373 }
2374 #endif
2375
2376 // the format of the stacktrace will be:
2377 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2378 // - 0 or more <init> methods for the exception class (skipped)
2379 // - rest of the stack
2380
2381 if (!skip_fillInStackTrace_check) {
2382 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2383 throwable->is_a(method->method_holder())) {
2384 continue;
2385 }
2386 else {
2387 skip_fillInStackTrace_check = true; // gone past them all
2388 }
2389 }
2390 if (!skip_throwableInit_check) {
2391 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2392
2393 // skip <init> methods of the exception class and superclasses
2394 // This is simlar to classic VM.
2395 if (method->name() == vmSymbols::object_initializer_name() &&
2396 throwable->is_a(method->method_holder())) {
2397 continue;
2398 } else {
2399 // there are none or we've seen them all - either way stop checking
2400 skip_throwableInit_check = true;
2401 }
2402 }
2403 if (method->is_hidden()) {
2404 if (skip_hidden) continue;
2405 }
2406 bt.push(method, bci, CHECK);
2407 total_count++;
2408 }
2409
2410 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2411
2412 // Put completed stack trace into throwable object
2413 set_backtrace(throwable(), bt.backtrace());
2414 set_depth(throwable(), total_count);
2415 }
2416
fill_in_stack_trace(Handle throwable,const methodHandle & method)2417 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2418 // No-op if stack trace is disabled
2419 if (!StackTraceInThrowable) {
2420 return;
2421 }
2422
2423 // Disable stack traces for some preallocated out of memory errors
2424 if (!Universe::should_fill_in_stack_trace(throwable)) {
2425 return;
2426 }
2427
2428 PRESERVE_EXCEPTION_MARK;
2429
2430 JavaThread* thread = JavaThread::active();
2431 fill_in_stack_trace(throwable, method, thread);
2432 // ignore exceptions thrown during stack trace filling
2433 CLEAR_PENDING_EXCEPTION;
2434 }
2435
allocate_backtrace(Handle throwable,TRAPS)2436 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2437 // Allocate stack trace - backtrace is created but not filled in
2438
2439 // No-op if stack trace is disabled
2440 if (!StackTraceInThrowable) return;
2441 BacktraceBuilder bt(CHECK); // creates a backtrace
2442 set_backtrace(throwable(), bt.backtrace());
2443 }
2444
2445
fill_in_stack_trace_of_preallocated_backtrace(Handle throwable)2446 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2447 // Fill in stack trace into preallocated backtrace (no GC)
2448
2449 // No-op if stack trace is disabled
2450 if (!StackTraceInThrowable) return;
2451
2452 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2453
2454 JavaThread* THREAD = JavaThread::current();
2455
2456 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2457 assert(backtrace.not_null(), "backtrace should have been preallocated");
2458
2459 ResourceMark rm(THREAD);
2460 vframeStream st(THREAD);
2461
2462 BacktraceBuilder bt(THREAD, backtrace);
2463
2464 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2465 // methods as preallocated errors aren't created by "java" code.
2466
2467 // fill in as much stack trace as possible
2468 int chunk_count = 0;
2469 for (;!st.at_end(); st.next()) {
2470 bt.push(st.method(), st.bci(), CHECK);
2471 chunk_count++;
2472
2473 // Bail-out for deep stacks
2474 if (chunk_count >= trace_chunk_size) break;
2475 }
2476 set_depth(throwable(), chunk_count);
2477 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2478
2479 // We support the Throwable immutability protocol defined for Java 7.
2480 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2481 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2482 }
2483
get_stack_trace_elements(Handle throwable,objArrayHandle stack_trace_array_h,TRAPS)2484 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2485 objArrayHandle stack_trace_array_h, TRAPS) {
2486
2487 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2488 THROW(vmSymbols::java_lang_NullPointerException());
2489 }
2490
2491 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2492
2493 if (stack_trace_array_h->length() != depth(throwable())) {
2494 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2495 }
2496
2497 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2498 BacktraceIterator iter(result, THREAD);
2499
2500 int index = 0;
2501 while (iter.repeat()) {
2502 BacktraceElement bte = iter.next(THREAD);
2503
2504 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2505
2506 if (stack_trace_element.is_null()) {
2507 THROW(vmSymbols::java_lang_NullPointerException());
2508 }
2509
2510 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2511 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2512
2513 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2514 method,
2515 bte._version,
2516 bte._bci,
2517 bte._name, CHECK);
2518 }
2519 }
2520
create(const methodHandle & method,int bci,TRAPS)2521 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2522 // Allocate java.lang.StackTraceElement instance
2523 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2524 assert(k != NULL, "must be loaded in 1.4+");
2525 if (k->should_be_initialized()) {
2526 k->initialize(CHECK_0);
2527 }
2528
2529 Handle element = k->allocate_instance_handle(CHECK_0);
2530
2531 int version = method->constants()->version();
2532 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2533 return element();
2534 }
2535
fill_in(Handle element,InstanceKlass * holder,const methodHandle & method,int version,int bci,Symbol * name,TRAPS)2536 void java_lang_StackTraceElement::fill_in(Handle element,
2537 InstanceKlass* holder, const methodHandle& method,
2538 int version, int bci, Symbol* name, TRAPS) {
2539 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2540
2541 ResourceMark rm(THREAD);
2542 HandleMark hm(THREAD);
2543
2544 // Fill in class name
2545 Handle java_class(THREAD, holder->java_mirror());
2546 oop classname = java_lang_Class::name(java_class, CHECK);
2547 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2548 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2549
2550 oop loader = holder->class_loader();
2551 if (loader != NULL) {
2552 oop loader_name = java_lang_ClassLoader::name(loader);
2553 if (loader_name != NULL)
2554 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2555 }
2556
2557 // Fill in method name
2558 oop methodname = StringTable::intern(name, CHECK);
2559 java_lang_StackTraceElement::set_methodName(element(), methodname);
2560
2561 // Fill in module name and version
2562 ModuleEntry* module = holder->module();
2563 if (module->is_named()) {
2564 oop module_name = StringTable::intern(module->name(), CHECK);
2565 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2566 oop module_version;
2567 if (module->version() != NULL) {
2568 module_version = StringTable::intern(module->version(), CHECK);
2569 } else {
2570 module_version = NULL;
2571 }
2572 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2573 }
2574
2575 if (method() == NULL || !version_matches(method(), version)) {
2576 // The method was redefined, accurate line number information isn't available
2577 java_lang_StackTraceElement::set_fileName(element(), NULL);
2578 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2579 } else {
2580 // Fill in source file name and line number.
2581 Symbol* source = Backtrace::get_source_file_name(holder, version);
2582 oop source_file = java_lang_Class::source_file(java_class());
2583 if (source != NULL) {
2584 // Class was not redefined. We can trust its cache if set,
2585 // else we have to initialize it.
2586 if (source_file == NULL) {
2587 source_file = StringTable::intern(source, CHECK);
2588 java_lang_Class::set_source_file(java_class(), source_file);
2589 }
2590 } else {
2591 // Class was redefined. Dump the cache if it was set.
2592 if (source_file != NULL) {
2593 source_file = NULL;
2594 java_lang_Class::set_source_file(java_class(), source_file);
2595 }
2596 }
2597 java_lang_StackTraceElement::set_fileName(element(), source_file);
2598
2599 int line_number = Backtrace::get_line_number(method, bci);
2600 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2601 }
2602 }
2603
2604 #if INCLUDE_JVMCI
decode(Handle mirror,methodHandle method,int bci,Symbol * & methodname,Symbol * & filename,int & line_number)2605 void java_lang_StackTraceElement::decode(Handle mirror, methodHandle method, int bci, Symbol*& methodname, Symbol*& filename, int& line_number) {
2606 int method_id = method->orig_method_idnum();
2607 int cpref = method->name_index();
2608 decode(mirror, method_id, method->constants()->version(), bci, cpref, methodname, filename, line_number);
2609 }
2610
decode(Handle mirror,int method_id,int version,int bci,int cpref,Symbol * & methodname,Symbol * & filename,int & line_number)2611 void java_lang_StackTraceElement::decode(Handle mirror, int method_id, int version, int bci, int cpref, Symbol*& methodname, Symbol*& filename, int& line_number) {
2612 // Fill in class name
2613 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2614 Method* method = holder->method_with_orig_idnum(method_id, version);
2615
2616 // The method can be NULL if the requested class version is gone
2617 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
2618
2619 // Fill in method name
2620 methodname = sym;
2621
2622 if (!version_matches(method, version)) {
2623 // If the method was redefined, accurate line number information isn't available
2624 filename = NULL;
2625 line_number = -1;
2626 } else {
2627 // Fill in source file name and line number.
2628 // Use a specific ik version as a holder since the mirror might
2629 // refer to a version that is now obsolete and no longer accessible
2630 // via the previous versions list.
2631 holder = holder->get_klass_version(version);
2632 assert(holder != NULL, "sanity check");
2633 filename = holder->source_file_name();
2634 line_number = Backtrace::get_line_number(method, bci);
2635 }
2636 }
2637 #endif // INCLUDE_JVMCI
2638
get_method(Handle stackFrame,InstanceKlass * holder,TRAPS)2639 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2640 HandleMark hm(THREAD);
2641 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2642 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2643 // we should expand MemberName::name when Throwable uses StackTrace
2644 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2645 return method;
2646 }
2647
set_method_and_bci(Handle stackFrame,const methodHandle & method,int bci,TRAPS)2648 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2649 // set Method* or mid/cpref
2650 HandleMark hm(THREAD);
2651 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2652 InstanceKlass* ik = method->method_holder();
2653 CallInfo info(method(), ik, CHECK);
2654 MethodHandles::init_method_MemberName(mname, info);
2655 // set bci
2656 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2657 // method may be redefined; store the version
2658 int version = method->constants()->version();
2659 assert((jushort)version == version, "version should be short");
2660 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2661 }
2662
to_stack_trace_element(Handle stackFrame,Handle stack_trace_element,TRAPS)2663 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2664 ResourceMark rm(THREAD);
2665 HandleMark hm(THREAD);
2666 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2667 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2668 InstanceKlass* holder = InstanceKlass::cast(clazz);
2669 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2670
2671 short version = stackFrame->short_field(_version_offset);
2672 int bci = stackFrame->int_field(_bci_offset);
2673 Symbol* name = method->name();
2674 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2675 }
2676
2677 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2678 macro(_memberName_offset, k, "memberName", object_signature, false); \
2679 macro(_bci_offset, k, "bci", int_signature, false)
2680
compute_offsets()2681 void java_lang_StackFrameInfo::compute_offsets() {
2682 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2683 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2684 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2685 }
2686
2687 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)2688 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2689 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2690 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2691 }
2692 #endif
2693
2694 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2695 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2696 macro(_locals_offset, k, "locals", object_array_signature, false); \
2697 macro(_operands_offset, k, "operands", object_array_signature, false); \
2698 macro(_mode_offset, k, "mode", int_signature, false)
2699
compute_offsets()2700 void java_lang_LiveStackFrameInfo::compute_offsets() {
2701 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2702 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2703 }
2704
2705 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)2706 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2707 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2708 }
2709 #endif
2710
2711 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2712 macro(override_offset, k, "override", bool_signature, false)
2713
compute_offsets()2714 void java_lang_reflect_AccessibleObject::compute_offsets() {
2715 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2716 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2717 }
2718
2719 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)2720 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2721 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2722 }
2723 #endif
2724
override(oop reflect)2725 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2726 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2727 return (jboolean) reflect->bool_field(override_offset);
2728 }
2729
set_override(oop reflect,jboolean value)2730 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2731 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2732 reflect->bool_field_put(override_offset, (int) value);
2733 }
2734
2735 #define METHOD_FIELDS_DO(macro) \
2736 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2737 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2738 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2739 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2740 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2741 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2742 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2743 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2744 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2745 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2746 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2747
compute_offsets()2748 void java_lang_reflect_Method::compute_offsets() {
2749 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2750 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2751 }
2752
2753 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)2754 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2755 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2756 }
2757 #endif
2758
create(TRAPS)2759 Handle java_lang_reflect_Method::create(TRAPS) {
2760 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2761 Klass* klass = SystemDictionary::reflect_Method_klass();
2762 // This class is eagerly initialized during VM initialization, since we keep a refence
2763 // to one of the methods
2764 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2765 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2766 }
2767
clazz(oop reflect)2768 oop java_lang_reflect_Method::clazz(oop reflect) {
2769 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2770 return reflect->obj_field(clazz_offset);
2771 }
2772
set_clazz(oop reflect,oop value)2773 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2775 reflect->obj_field_put(clazz_offset, value);
2776 }
2777
slot(oop reflect)2778 int java_lang_reflect_Method::slot(oop reflect) {
2779 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2780 return reflect->int_field(slot_offset);
2781 }
2782
set_slot(oop reflect,int value)2783 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2784 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2785 reflect->int_field_put(slot_offset, value);
2786 }
2787
set_name(oop method,oop value)2788 void java_lang_reflect_Method::set_name(oop method, oop value) {
2789 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2790 method->obj_field_put(name_offset, value);
2791 }
2792
return_type(oop method)2793 oop java_lang_reflect_Method::return_type(oop method) {
2794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2795 return method->obj_field(returnType_offset);
2796 }
2797
set_return_type(oop method,oop value)2798 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2800 method->obj_field_put(returnType_offset, value);
2801 }
2802
parameter_types(oop method)2803 oop java_lang_reflect_Method::parameter_types(oop method) {
2804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2805 return method->obj_field(parameterTypes_offset);
2806 }
2807
set_parameter_types(oop method,oop value)2808 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2810 method->obj_field_put(parameterTypes_offset, value);
2811 }
2812
set_exception_types(oop method,oop value)2813 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2814 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2815 method->obj_field_put(exceptionTypes_offset, value);
2816 }
2817
set_modifiers(oop method,int value)2818 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2819 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2820 method->int_field_put(modifiers_offset, value);
2821 }
2822
set_signature(oop method,oop value)2823 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2824 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2825 method->obj_field_put(signature_offset, value);
2826 }
2827
set_annotations(oop method,oop value)2828 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2829 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2830 method->obj_field_put(annotations_offset, value);
2831 }
2832
set_parameter_annotations(oop method,oop value)2833 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2834 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2835 method->obj_field_put(parameter_annotations_offset, value);
2836 }
2837
set_annotation_default(oop method,oop value)2838 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2839 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2840 method->obj_field_put(annotation_default_offset, value);
2841 }
2842
2843 #define CONSTRUCTOR_FIELDS_DO(macro) \
2844 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2845 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2846 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2847 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2848 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2849 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2850 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2851 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2852
compute_offsets()2853 void java_lang_reflect_Constructor::compute_offsets() {
2854 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2855 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2856 }
2857
2858 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)2859 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2860 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2861 }
2862 #endif
2863
create(TRAPS)2864 Handle java_lang_reflect_Constructor::create(TRAPS) {
2865 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2866 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2867 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2868 InstanceKlass* ik = InstanceKlass::cast(k);
2869 // Ensure it is initialized
2870 ik->initialize(CHECK_NH);
2871 return ik->allocate_instance_handle(THREAD);
2872 }
2873
clazz(oop reflect)2874 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2875 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2876 return reflect->obj_field(clazz_offset);
2877 }
2878
set_clazz(oop reflect,oop value)2879 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2880 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2881 reflect->obj_field_put(clazz_offset, value);
2882 }
2883
parameter_types(oop constructor)2884 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2886 return constructor->obj_field(parameterTypes_offset);
2887 }
2888
set_parameter_types(oop constructor,oop value)2889 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2891 constructor->obj_field_put(parameterTypes_offset, value);
2892 }
2893
set_exception_types(oop constructor,oop value)2894 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2896 constructor->obj_field_put(exceptionTypes_offset, value);
2897 }
2898
slot(oop reflect)2899 int java_lang_reflect_Constructor::slot(oop reflect) {
2900 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2901 return reflect->int_field(slot_offset);
2902 }
2903
set_slot(oop reflect,int value)2904 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2905 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2906 reflect->int_field_put(slot_offset, value);
2907 }
2908
set_modifiers(oop constructor,int value)2909 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2911 constructor->int_field_put(modifiers_offset, value);
2912 }
2913
set_signature(oop constructor,oop value)2914 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2916 constructor->obj_field_put(signature_offset, value);
2917 }
2918
set_annotations(oop constructor,oop value)2919 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2921 constructor->obj_field_put(annotations_offset, value);
2922 }
2923
set_parameter_annotations(oop method,oop value)2924 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2926 method->obj_field_put(parameter_annotations_offset, value);
2927 }
2928
2929 #define FIELD_FIELDS_DO(macro) \
2930 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2931 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2932 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
2933 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2934 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2935 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2936 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
2937
compute_offsets()2938 void java_lang_reflect_Field::compute_offsets() {
2939 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
2940 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2941 }
2942
2943 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)2944 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
2945 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2946 }
2947 #endif
2948
create(TRAPS)2949 Handle java_lang_reflect_Field::create(TRAPS) {
2950 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2951 Symbol* name = vmSymbols::java_lang_reflect_Field();
2952 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2953 InstanceKlass* ik = InstanceKlass::cast(k);
2954 // Ensure it is initialized
2955 ik->initialize(CHECK_NH);
2956 return ik->allocate_instance_handle(THREAD);
2957 }
2958
clazz(oop reflect)2959 oop java_lang_reflect_Field::clazz(oop reflect) {
2960 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2961 return reflect->obj_field(clazz_offset);
2962 }
2963
set_clazz(oop reflect,oop value)2964 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2965 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2966 reflect->obj_field_put(clazz_offset, value);
2967 }
2968
name(oop field)2969 oop java_lang_reflect_Field::name(oop field) {
2970 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2971 return field->obj_field(name_offset);
2972 }
2973
set_name(oop field,oop value)2974 void java_lang_reflect_Field::set_name(oop field, oop value) {
2975 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2976 field->obj_field_put(name_offset, value);
2977 }
2978
type(oop field)2979 oop java_lang_reflect_Field::type(oop field) {
2980 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2981 return field->obj_field(type_offset);
2982 }
2983
set_type(oop field,oop value)2984 void java_lang_reflect_Field::set_type(oop field, oop value) {
2985 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2986 field->obj_field_put(type_offset, value);
2987 }
2988
slot(oop reflect)2989 int java_lang_reflect_Field::slot(oop reflect) {
2990 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2991 return reflect->int_field(slot_offset);
2992 }
2993
set_slot(oop reflect,int value)2994 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2995 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2996 reflect->int_field_put(slot_offset, value);
2997 }
2998
modifiers(oop field)2999 int java_lang_reflect_Field::modifiers(oop field) {
3000 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3001 return field->int_field(modifiers_offset);
3002 }
3003
set_modifiers(oop field,int value)3004 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3005 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3006 field->int_field_put(modifiers_offset, value);
3007 }
3008
set_signature(oop field,oop value)3009 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3010 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3011 field->obj_field_put(signature_offset, value);
3012 }
3013
set_annotations(oop field,oop value)3014 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3015 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3016 field->obj_field_put(annotations_offset, value);
3017 }
3018
3019 #define CONSTANTPOOL_FIELDS_DO(macro) \
3020 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3021
compute_offsets()3022 void reflect_ConstantPool::compute_offsets() {
3023 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3024 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3025 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3026 }
3027
3028 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3029 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3030 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3031 }
3032 #endif
3033
3034 #define PARAMETER_FIELDS_DO(macro) \
3035 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3036 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3037 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3038 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3039
compute_offsets()3040 void java_lang_reflect_Parameter::compute_offsets() {
3041 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3042 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3043 }
3044
3045 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3046 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3047 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3048 }
3049 #endif
3050
create(TRAPS)3051 Handle java_lang_reflect_Parameter::create(TRAPS) {
3052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3053 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3054 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3055 InstanceKlass* ik = InstanceKlass::cast(k);
3056 // Ensure it is initialized
3057 ik->initialize(CHECK_NH);
3058 return ik->allocate_instance_handle(THREAD);
3059 }
3060
name(oop param)3061 oop java_lang_reflect_Parameter::name(oop param) {
3062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3063 return param->obj_field(name_offset);
3064 }
3065
set_name(oop param,oop value)3066 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3068 param->obj_field_put(name_offset, value);
3069 }
3070
modifiers(oop param)3071 int java_lang_reflect_Parameter::modifiers(oop param) {
3072 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3073 return param->int_field(modifiers_offset);
3074 }
3075
set_modifiers(oop param,int value)3076 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3078 param->int_field_put(modifiers_offset, value);
3079 }
3080
index(oop param)3081 int java_lang_reflect_Parameter::index(oop param) {
3082 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3083 return param->int_field(index_offset);
3084 }
3085
set_index(oop param,int value)3086 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3087 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3088 param->int_field_put(index_offset, value);
3089 }
3090
executable(oop param)3091 oop java_lang_reflect_Parameter::executable(oop param) {
3092 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3093 return param->obj_field(executable_offset);
3094 }
3095
set_executable(oop param,oop value)3096 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3098 param->obj_field_put(executable_offset, value);
3099 }
3100
3101
3102 int java_lang_Module::loader_offset;
3103 int java_lang_Module::name_offset;
3104 int java_lang_Module::_module_entry_offset = -1;
3105
create(Handle loader,Handle module_name,TRAPS)3106 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3108 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3109 vmSymbols::java_lang_module_init_signature(),
3110 loader, module_name, CHECK_NH);
3111 }
3112
3113 #define MODULE_FIELDS_DO(macro) \
3114 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3115 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3116
compute_offsets()3117 void java_lang_Module::compute_offsets() {
3118 InstanceKlass* k = SystemDictionary::Module_klass();
3119 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3120 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3121 }
3122
3123 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3124 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3125 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3126 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3127 }
3128 #endif
3129
loader(oop module)3130 oop java_lang_Module::loader(oop module) {
3131 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3132 return module->obj_field(loader_offset);
3133 }
3134
set_loader(oop module,oop value)3135 void java_lang_Module::set_loader(oop module, oop value) {
3136 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3137 module->obj_field_put(loader_offset, value);
3138 }
3139
name(oop module)3140 oop java_lang_Module::name(oop module) {
3141 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3142 return module->obj_field(name_offset);
3143 }
3144
set_name(oop module,oop value)3145 void java_lang_Module::set_name(oop module, oop value) {
3146 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3147 module->obj_field_put(name_offset, value);
3148 }
3149
module_entry(oop module)3150 ModuleEntry* java_lang_Module::module_entry(oop module) {
3151 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3152 assert(module != NULL, "module can't be null");
3153 assert(oopDesc::is_oop(module), "module must be oop");
3154
3155 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3156 if (module_entry == NULL) {
3157 // If the inject field containing the ModuleEntry* is null then return the
3158 // class loader's unnamed module.
3159 oop loader = java_lang_Module::loader(module);
3160 Handle h_loader = Handle(Thread::current(), loader);
3161 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3162 return loader_cld->unnamed_module();
3163 }
3164 return module_entry;
3165 }
3166
set_module_entry(oop module,ModuleEntry * module_entry)3167 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3168 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3169 assert(module != NULL, "module can't be null");
3170 assert(oopDesc::is_oop(module), "module must be oop");
3171 module->address_field_put(_module_entry_offset, (address)module_entry);
3172 }
3173
create(TRAPS)3174 Handle reflect_ConstantPool::create(TRAPS) {
3175 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3176 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3177 // Ensure it is initialized
3178 k->initialize(CHECK_NH);
3179 return k->allocate_instance_handle(THREAD);
3180 }
3181
3182
set_cp(oop reflect,ConstantPool * value)3183 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3184 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3185 oop mirror = value->pool_holder()->java_mirror();
3186 // Save the mirror to get back the constant pool.
3187 reflect->obj_field_put(_oop_offset, mirror);
3188 }
3189
get_cp(oop reflect)3190 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3191 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3192
3193 oop mirror = reflect->obj_field(_oop_offset);
3194 Klass* k = java_lang_Class::as_Klass(mirror);
3195 assert(k->is_instance_klass(), "Must be");
3196
3197 // Get the constant pool back from the klass. Since class redefinition
3198 // merges the new constant pool into the old, this is essentially the
3199 // same constant pool as the original. If constant pool merging is
3200 // no longer done in the future, this will have to change to save
3201 // the original.
3202 return InstanceKlass::cast(k)->constants();
3203 }
3204
3205 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3206 macro(_base_offset, k, "base", object_signature, false)
3207
compute_offsets()3208 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3209 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3210 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3211 }
3212
3213 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3214 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3215 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3216 }
3217 #endif
3218
initialize_and_allocate(BasicType type,TRAPS)3219 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3220 Klass* k = SystemDictionary::box_klass(type);
3221 if (k == NULL) return NULL;
3222 InstanceKlass* ik = InstanceKlass::cast(k);
3223 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3224 return ik->allocate_instance(THREAD);
3225 }
3226
3227
create(BasicType type,jvalue * value,TRAPS)3228 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3229 oop box = initialize_and_allocate(type, CHECK_0);
3230 if (box == NULL) return NULL;
3231 switch (type) {
3232 case T_BOOLEAN:
3233 box->bool_field_put(value_offset, value->z);
3234 break;
3235 case T_CHAR:
3236 box->char_field_put(value_offset, value->c);
3237 break;
3238 case T_FLOAT:
3239 box->float_field_put(value_offset, value->f);
3240 break;
3241 case T_DOUBLE:
3242 box->double_field_put(long_value_offset, value->d);
3243 break;
3244 case T_BYTE:
3245 box->byte_field_put(value_offset, value->b);
3246 break;
3247 case T_SHORT:
3248 box->short_field_put(value_offset, value->s);
3249 break;
3250 case T_INT:
3251 box->int_field_put(value_offset, value->i);
3252 break;
3253 case T_LONG:
3254 box->long_field_put(long_value_offset, value->j);
3255 break;
3256 default:
3257 return NULL;
3258 }
3259 return box;
3260 }
3261
3262
basic_type(oop box)3263 BasicType java_lang_boxing_object::basic_type(oop box) {
3264 if (box == NULL) return T_ILLEGAL;
3265 BasicType type = SystemDictionary::box_klass_type(box->klass());
3266 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3267 return T_ILLEGAL;
3268 return type;
3269 }
3270
3271
get_value(oop box,jvalue * value)3272 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3273 BasicType type = SystemDictionary::box_klass_type(box->klass());
3274 switch (type) {
3275 case T_BOOLEAN:
3276 value->z = box->bool_field(value_offset);
3277 break;
3278 case T_CHAR:
3279 value->c = box->char_field(value_offset);
3280 break;
3281 case T_FLOAT:
3282 value->f = box->float_field(value_offset);
3283 break;
3284 case T_DOUBLE:
3285 value->d = box->double_field(long_value_offset);
3286 break;
3287 case T_BYTE:
3288 value->b = box->byte_field(value_offset);
3289 break;
3290 case T_SHORT:
3291 value->s = box->short_field(value_offset);
3292 break;
3293 case T_INT:
3294 value->i = box->int_field(value_offset);
3295 break;
3296 case T_LONG:
3297 value->j = box->long_field(long_value_offset);
3298 break;
3299 default:
3300 return T_ILLEGAL;
3301 } // end switch
3302 return type;
3303 }
3304
3305
set_value(oop box,jvalue * value)3306 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3307 BasicType type = SystemDictionary::box_klass_type(box->klass());
3308 switch (type) {
3309 case T_BOOLEAN:
3310 box->bool_field_put(value_offset, value->z);
3311 break;
3312 case T_CHAR:
3313 box->char_field_put(value_offset, value->c);
3314 break;
3315 case T_FLOAT:
3316 box->float_field_put(value_offset, value->f);
3317 break;
3318 case T_DOUBLE:
3319 box->double_field_put(long_value_offset, value->d);
3320 break;
3321 case T_BYTE:
3322 box->byte_field_put(value_offset, value->b);
3323 break;
3324 case T_SHORT:
3325 box->short_field_put(value_offset, value->s);
3326 break;
3327 case T_INT:
3328 box->int_field_put(value_offset, value->i);
3329 break;
3330 case T_LONG:
3331 box->long_field_put(long_value_offset, value->j);
3332 break;
3333 default:
3334 return T_ILLEGAL;
3335 } // end switch
3336 return type;
3337 }
3338
3339
print(BasicType type,jvalue * value,outputStream * st)3340 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3341 switch (type) {
3342 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3343 case T_CHAR: st->print("%d", value->c); break;
3344 case T_BYTE: st->print("%d", value->b); break;
3345 case T_SHORT: st->print("%d", value->s); break;
3346 case T_INT: st->print("%d", value->i); break;
3347 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3348 case T_FLOAT: st->print("%f", value->f); break;
3349 case T_DOUBLE: st->print("%lf", value->d); break;
3350 default: st->print("type %d?", type); break;
3351 }
3352 }
3353
3354 // Support for java_lang_ref_Reference
3355
is_referent_field(oop obj,ptrdiff_t offset)3356 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3357 assert(obj != NULL, "sanity");
3358 if (offset != java_lang_ref_Reference::referent_offset) {
3359 return false;
3360 }
3361
3362 Klass* k = obj->klass();
3363 if (!k->is_instance_klass()) {
3364 return false;
3365 }
3366
3367 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3368 bool is_reference = ik->reference_type() != REF_NONE;
3369 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3370 return is_reference;
3371 }
3372
3373 // Support for java_lang_ref_SoftReference
3374 //
3375
3376 #define SOFTREFERENCE_FIELDS_DO(macro) \
3377 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3378 macro(static_clock_offset, k, "clock", long_signature, true)
3379
compute_offsets()3380 void java_lang_ref_SoftReference::compute_offsets() {
3381 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3382 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3383 }
3384
3385 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3386 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3387 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3388 }
3389 #endif
3390
timestamp(oop ref)3391 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3392 return ref->long_field(timestamp_offset);
3393 }
3394
clock()3395 jlong java_lang_ref_SoftReference::clock() {
3396 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3397 oop base = ik->static_field_base_raw();
3398 return base->long_field(static_clock_offset);
3399 }
3400
set_clock(jlong value)3401 void java_lang_ref_SoftReference::set_clock(jlong value) {
3402 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3403 oop base = ik->static_field_base_raw();
3404 base->long_field_put(static_clock_offset, value);
3405 }
3406
3407 // Support for java_lang_invoke_DirectMethodHandle
3408
3409 int java_lang_invoke_DirectMethodHandle::_member_offset;
3410
member(oop dmh)3411 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3412 oop member_name = NULL;
3413 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3414 "a DirectMethodHandle oop is expected");
3415 return dmh->obj_field(member_offset_in_bytes());
3416 }
3417
3418 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3419 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3420
compute_offsets()3421 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3422 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3423 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3424 }
3425
3426 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3427 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3428 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3429 }
3430 #endif
3431
3432 // Support for java_lang_invoke_MethodHandle
3433
3434 int java_lang_invoke_MethodHandle::_type_offset;
3435 int java_lang_invoke_MethodHandle::_form_offset;
3436
3437 int java_lang_invoke_MemberName::_clazz_offset;
3438 int java_lang_invoke_MemberName::_name_offset;
3439 int java_lang_invoke_MemberName::_type_offset;
3440 int java_lang_invoke_MemberName::_flags_offset;
3441 int java_lang_invoke_MemberName::_method_offset;
3442 int java_lang_invoke_MemberName::_vmindex_offset;
3443
3444 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3445 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3446
3447 int java_lang_invoke_LambdaForm::_vmentry_offset;
3448
3449 #define METHODHANDLE_FIELDS_DO(macro) \
3450 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3451 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3452
compute_offsets()3453 void java_lang_invoke_MethodHandle::compute_offsets() {
3454 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3455 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3456 }
3457
3458 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3459 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3460 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3461 }
3462 #endif
3463
3464 #define MEMBERNAME_FIELDS_DO(macro) \
3465 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3466 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3467 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3468 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3469 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3470
compute_offsets()3471 void java_lang_invoke_MemberName::compute_offsets() {
3472 InstanceKlass* k = SystemDictionary::MemberName_klass();
3473 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3474 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3475 }
3476
3477 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3478 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3479 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3480 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3481 }
3482 #endif
3483
compute_offsets()3484 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3485 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3486 assert(k != NULL, "jdk mismatch");
3487 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3488 }
3489
3490 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3491 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3492 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3493 }
3494 #endif
3495
3496 #define LAMBDAFORM_FIELDS_DO(macro) \
3497 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3498
compute_offsets()3499 void java_lang_invoke_LambdaForm::compute_offsets() {
3500 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3501 assert (k != NULL, "jdk mismatch");
3502 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3503 }
3504
3505 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3506 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3507 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3508 }
3509 #endif
3510
is_instance(oop obj)3511 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3512 return obj != NULL && is_subclass(obj->klass());
3513 }
3514
3515
type(oop mh)3516 oop java_lang_invoke_MethodHandle::type(oop mh) {
3517 return mh->obj_field(_type_offset);
3518 }
3519
set_type(oop mh,oop mtype)3520 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3521 mh->obj_field_put(_type_offset, mtype);
3522 }
3523
form(oop mh)3524 oop java_lang_invoke_MethodHandle::form(oop mh) {
3525 assert(_form_offset != 0, "");
3526 return mh->obj_field(_form_offset);
3527 }
3528
set_form(oop mh,oop lform)3529 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3530 assert(_form_offset != 0, "");
3531 mh->obj_field_put(_form_offset, lform);
3532 }
3533
3534 /// MemberName accessors
3535
clazz(oop mname)3536 oop java_lang_invoke_MemberName::clazz(oop mname) {
3537 assert(is_instance(mname), "wrong type");
3538 return mname->obj_field(_clazz_offset);
3539 }
3540
set_clazz(oop mname,oop clazz)3541 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3542 assert(is_instance(mname), "wrong type");
3543 mname->obj_field_put(_clazz_offset, clazz);
3544 }
3545
name(oop mname)3546 oop java_lang_invoke_MemberName::name(oop mname) {
3547 assert(is_instance(mname), "wrong type");
3548 return mname->obj_field(_name_offset);
3549 }
3550
set_name(oop mname,oop name)3551 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3552 assert(is_instance(mname), "wrong type");
3553 mname->obj_field_put(_name_offset, name);
3554 }
3555
type(oop mname)3556 oop java_lang_invoke_MemberName::type(oop mname) {
3557 assert(is_instance(mname), "wrong type");
3558 return mname->obj_field(_type_offset);
3559 }
3560
set_type(oop mname,oop type)3561 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3562 assert(is_instance(mname), "wrong type");
3563 mname->obj_field_put(_type_offset, type);
3564 }
3565
flags(oop mname)3566 int java_lang_invoke_MemberName::flags(oop mname) {
3567 assert(is_instance(mname), "wrong type");
3568 return mname->int_field(_flags_offset);
3569 }
3570
set_flags(oop mname,int flags)3571 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3572 assert(is_instance(mname), "wrong type");
3573 mname->int_field_put(_flags_offset, flags);
3574 }
3575
3576
3577 // Return vmtarget from ResolvedMethodName method field through indirection
vmtarget(oop mname)3578 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3579 assert(is_instance(mname), "wrong type");
3580 oop method = mname->obj_field(_method_offset);
3581 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3582 }
3583
is_method(oop mname)3584 bool java_lang_invoke_MemberName::is_method(oop mname) {
3585 assert(is_instance(mname), "must be MemberName");
3586 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3587 }
3588
set_method(oop mname,oop resolved_method)3589 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3590 assert(is_instance(mname), "wrong type");
3591 mname->obj_field_put(_method_offset, resolved_method);
3592 }
3593
vmindex(oop mname)3594 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3595 assert(is_instance(mname), "wrong type");
3596 return (intptr_t) mname->address_field(_vmindex_offset);
3597 }
3598
set_vmindex(oop mname,intptr_t index)3599 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3600 assert(is_instance(mname), "wrong type");
3601 mname->address_field_put(_vmindex_offset, (address) index);
3602 }
3603
3604
vmtarget(oop resolved_method)3605 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3606 assert(is_instance(resolved_method), "wrong type");
3607 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3608 assert(m->is_method(), "must be");
3609 return m;
3610 }
3611
3612 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
set_vmtarget(oop resolved_method,Method * m)3613 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3614 assert(is_instance(resolved_method), "wrong type");
3615 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3616 }
3617
set_vmholder(oop resolved_method,oop holder)3618 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
3619 assert(is_instance(resolved_method), "wrong type");
3620 resolved_method->obj_field_put(_vmholder_offset, holder);
3621 }
3622
find_resolved_method(const methodHandle & m,TRAPS)3623 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3624 const Method* method = m();
3625
3626 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3627 oop resolved_method = ResolvedMethodTable::find_method(method);
3628 if (resolved_method != NULL) {
3629 return resolved_method;
3630 }
3631
3632 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3633 if (!k->is_initialized()) {
3634 k->initialize(CHECK_NULL);
3635 }
3636
3637 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3638
3639 NoSafepointVerifier nsv;
3640
3641 if (method->is_old()) {
3642 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
3643 method->get_new_method();
3644 }
3645
3646 InstanceKlass* holder = method->method_holder();
3647
3648 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
3649 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3650 // distinct loaders) to ensure the metadata is kept alive.
3651 // This mirror may be different than the one in clazz field.
3652 set_vmholder(new_resolved_method, holder->java_mirror());
3653
3654 // Set flag in class to indicate this InstanceKlass has entries in the table
3655 // to avoid walking table during redefinition if none of the redefined classes
3656 // have any membernames in the table.
3657 holder->set_has_resolved_methods();
3658
3659 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
3660 }
3661
vmentry(oop lform)3662 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3663 assert(is_instance(lform), "wrong type");
3664 return lform->obj_field(_vmentry_offset);
3665 }
3666
3667
3668 // Support for java_lang_invoke_MethodType
3669
3670 int java_lang_invoke_MethodType::_rtype_offset;
3671 int java_lang_invoke_MethodType::_ptypes_offset;
3672
3673 #define METHODTYPE_FIELDS_DO(macro) \
3674 macro(_rtype_offset, k, "rtype", class_signature, false); \
3675 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3676
compute_offsets()3677 void java_lang_invoke_MethodType::compute_offsets() {
3678 InstanceKlass* k = SystemDictionary::MethodType_klass();
3679 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3680 }
3681
3682 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3683 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3684 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3685 }
3686 #endif
3687
print_signature(oop mt,outputStream * st)3688 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3689 st->print("(");
3690 objArrayOop pts = ptypes(mt);
3691 for (int i = 0, limit = pts->length(); i < limit; i++) {
3692 java_lang_Class::print_signature(pts->obj_at(i), st);
3693 }
3694 st->print(")");
3695 java_lang_Class::print_signature(rtype(mt), st);
3696 }
3697
as_signature(oop mt,bool intern_if_not_found)3698 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
3699 ResourceMark rm;
3700 stringStream buffer(128);
3701 print_signature(mt, &buffer);
3702 const char* sigstr = buffer.base();
3703 int siglen = (int) buffer.size();
3704 Symbol *name;
3705 if (!intern_if_not_found) {
3706 name = SymbolTable::probe(sigstr, siglen);
3707 } else {
3708 name = SymbolTable::new_symbol(sigstr, siglen);
3709 }
3710 return name;
3711 }
3712
equals(oop mt1,oop mt2)3713 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3714 if (oopDesc::equals(mt1, mt2))
3715 return true;
3716 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3717 return false;
3718 if (ptype_count(mt1) != ptype_count(mt2))
3719 return false;
3720 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3721 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3722 return false;
3723 }
3724 return true;
3725 }
3726
rtype(oop mt)3727 oop java_lang_invoke_MethodType::rtype(oop mt) {
3728 assert(is_instance(mt), "must be a MethodType");
3729 return mt->obj_field(_rtype_offset);
3730 }
3731
ptypes(oop mt)3732 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3733 assert(is_instance(mt), "must be a MethodType");
3734 return (objArrayOop) mt->obj_field(_ptypes_offset);
3735 }
3736
ptype(oop mt,int idx)3737 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3738 return ptypes(mt)->obj_at(idx);
3739 }
3740
ptype_count(oop mt)3741 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3742 return ptypes(mt)->length();
3743 }
3744
ptype_slot_count(oop mt)3745 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3746 objArrayOop pts = ptypes(mt);
3747 int count = pts->length();
3748 int slots = 0;
3749 for (int i = 0; i < count; i++) {
3750 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3751 slots += type2size[bt];
3752 }
3753 return slots;
3754 }
3755
rtype_slot_count(oop mt)3756 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3757 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3758 return type2size[bt];
3759 }
3760
3761
3762 // Support for java_lang_invoke_CallSite
3763
3764 int java_lang_invoke_CallSite::_target_offset;
3765 int java_lang_invoke_CallSite::_context_offset;
3766
3767 #define CALLSITE_FIELDS_DO(macro) \
3768 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3769 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3770
compute_offsets()3771 void java_lang_invoke_CallSite::compute_offsets() {
3772 InstanceKlass* k = SystemDictionary::CallSite_klass();
3773 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3774 }
3775
3776 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3777 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3778 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3779 }
3780 #endif
3781
context_no_keepalive(oop call_site)3782 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3783 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3784
3785 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3786 return dep_oop;
3787 }
3788
3789 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3790
3791 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3792 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3793
compute_offsets()3794 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3795 InstanceKlass* k = SystemDictionary::Context_klass();
3796 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3797 }
3798
3799 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3800 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3801 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3802 }
3803 #endif
3804
vmdependencies(oop call_site)3805 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3806 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3807 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3808 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3809 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3810 return dep_ctx;
3811 }
3812
3813 // Support for java_security_AccessControlContext
3814
3815 int java_security_AccessControlContext::_context_offset = 0;
3816 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3817 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3818 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3819
3820 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3821 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3822 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3823 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3824 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3825
compute_offsets()3826 void java_security_AccessControlContext::compute_offsets() {
3827 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3828 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3829 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3830 }
3831
3832 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3833 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3834 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3835 }
3836 #endif
3837
create(objArrayHandle context,bool isPrivileged,Handle privileged_context,TRAPS)3838 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3839 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3840 // Ensure klass is initialized
3841 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3842 // Allocate result
3843 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3844 // Fill in values
3845 result->obj_field_put(_context_offset, context());
3846 result->obj_field_put(_privilegedContext_offset, privileged_context());
3847 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3848 // whitelist AccessControlContexts created by the JVM if present
3849 if (_isAuthorized_offset != -1) {
3850 result->bool_field_put(_isAuthorized_offset, true);
3851 }
3852 return result;
3853 }
3854
3855
3856 // Support for java_lang_ClassLoader
3857
3858 bool java_lang_ClassLoader::offsets_computed = false;
3859 int java_lang_ClassLoader::_loader_data_offset = -1;
3860 int java_lang_ClassLoader::parallelCapable_offset = -1;
3861 int java_lang_ClassLoader::name_offset = -1;
3862 int java_lang_ClassLoader::nameAndId_offset = -1;
3863 int java_lang_ClassLoader::unnamedModule_offset = -1;
3864
loader_data_acquire(oop loader)3865 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3866 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3867 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3868 }
3869
loader_data_raw(oop loader)3870 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3871 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3872 return RawAccess<>::load_at(loader, _loader_data_offset);
3873 }
3874
release_set_loader_data(oop loader,ClassLoaderData * new_data)3875 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3876 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3877 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3878 }
3879
3880 #define CLASSLOADER_FIELDS_DO(macro) \
3881 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3882 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3883 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3884 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3885 macro(parent_offset, k1, "parent", classloader_signature, false)
3886
compute_offsets()3887 void java_lang_ClassLoader::compute_offsets() {
3888 assert(!offsets_computed, "offsets should be initialized only once");
3889 offsets_computed = true;
3890
3891 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3892 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3893
3894 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3895 }
3896
3897 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3898 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3899 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3900 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3901 }
3902 #endif
3903
parent(oop loader)3904 oop java_lang_ClassLoader::parent(oop loader) {
3905 assert(is_instance(loader), "loader must be oop");
3906 return loader->obj_field(parent_offset);
3907 }
3908
3909 // Returns the name field of this class loader. If the name field has not
3910 // been set, null will be returned.
name(oop loader)3911 oop java_lang_ClassLoader::name(oop loader) {
3912 assert(is_instance(loader), "loader must be oop");
3913 return loader->obj_field(name_offset);
3914 }
3915
3916 // Returns the nameAndId field of this class loader. The format is
3917 // as follows:
3918 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3919 // If the defining loader has no name then <qualified-class-name> @<id>
3920 // If built-in loader, then omit '@<id>' as there is only one instance.
3921 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
nameAndId(oop loader)3922 oop java_lang_ClassLoader::nameAndId(oop loader) {
3923 assert(is_instance(loader), "loader must be oop");
3924 return loader->obj_field(nameAndId_offset);
3925 }
3926
isAncestor(oop loader,oop cl)3927 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3928 assert(is_instance(loader), "loader must be oop");
3929 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3930 oop acl = loader;
3931 debug_only(jint loop_count = 0);
3932 // This loop taken verbatim from ClassLoader.java:
3933 do {
3934 acl = parent(acl);
3935 if (oopDesc::equals(cl, acl)) {
3936 return true;
3937 }
3938 assert(++loop_count > 0, "loop_count overflow");
3939 } while (acl != NULL);
3940 return false;
3941 }
3942
is_instance(oop obj)3943 bool java_lang_ClassLoader::is_instance(oop obj) {
3944 return obj != NULL && is_subclass(obj->klass());
3945 }
3946
3947
3948 // For class loader classes, parallelCapable defined
3949 // based on non-null field
3950 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
parallelCapable(oop class_loader)3951 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3952 if (parallelCapable_offset == -1) {
3953 // Default for backward compatibility is false
3954 return false;
3955 }
3956 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3957 }
3958
is_trusted_loader(oop loader)3959 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3960 // Fix for 4474172; see evaluation for more details
3961 loader = non_reflection_class_loader(loader);
3962
3963 oop cl = SystemDictionary::java_system_loader();
3964 while(cl != NULL) {
3965 if (oopDesc::equals(cl, loader)) return true;
3966 cl = parent(cl);
3967 }
3968 return false;
3969 }
3970
3971 // Return true if this is one of the class loaders associated with
3972 // the generated bytecodes for reflection.
is_reflection_class_loader(oop loader)3973 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3974 if (loader != NULL) {
3975 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3976 // This might be null in non-1.4 JDKs
3977 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3978 }
3979 return false;
3980 }
3981
non_reflection_class_loader(oop loader)3982 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3983 // See whether this is one of the class loaders associated with
3984 // the generated bytecodes for reflection, and if so, "magically"
3985 // delegate to its parent to prevent class loading from occurring
3986 // in places where applications using reflection didn't expect it.
3987 if (is_reflection_class_loader(loader)) {
3988 return parent(loader);
3989 }
3990 return loader;
3991 }
3992
unnamedModule(oop loader)3993 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3994 assert(is_instance(loader), "loader must be oop");
3995 return loader->obj_field(unnamedModule_offset);
3996 }
3997
3998 // Support for java_lang_System
3999 //
4000 #define SYSTEM_FIELDS_DO(macro) \
4001 macro(static_in_offset, k, "in", input_stream_signature, true); \
4002 macro(static_out_offset, k, "out", print_stream_signature, true); \
4003 macro(static_err_offset, k, "err", print_stream_signature, true); \
4004 macro(static_security_offset, k, "security", security_manager_signature, true)
4005
compute_offsets()4006 void java_lang_System::compute_offsets() {
4007 InstanceKlass* k = SystemDictionary::System_klass();
4008 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4009 }
4010
4011 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4012 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4013 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4014 }
4015 #endif
4016
in_offset_in_bytes()4017 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
out_offset_in_bytes()4018 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
err_offset_in_bytes()4019 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4020
4021 // Support for jdk_internal_misc_UnsafeConstants
4022 //
4023 class UnsafeConstantsFixup : public FieldClosure {
4024 private:
4025 int _address_size;
4026 int _page_size;
4027 bool _big_endian;
4028 bool _use_unaligned_access;
4029 public:
UnsafeConstantsFixup()4030 UnsafeConstantsFixup() {
4031 // round up values for all static final fields
4032 _address_size = sizeof(void*);
4033 _page_size = os::vm_page_size();
4034 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4035 _use_unaligned_access = UseUnalignedAccesses;
4036 }
4037
do_field(fieldDescriptor * fd)4038 void do_field(fieldDescriptor* fd) {
4039 oop mirror = fd->field_holder()->java_mirror();
4040 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4041 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4042 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4043 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4044 if (fd->name() == vmSymbols::address_size_name()) {
4045 mirror->int_field_put(fd->offset(), _address_size);
4046 } else if (fd->name() == vmSymbols::page_size_name()) {
4047 mirror->int_field_put(fd->offset(), _page_size);
4048 } else if (fd->name() == vmSymbols::big_endian_name()) {
4049 mirror->bool_field_put(fd->offset(), _big_endian);
4050 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4051 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4052 } else {
4053 assert(false, "unexpected UnsafeConstants field");
4054 }
4055 }
4056 };
4057
set_unsafe_constants()4058 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4059 UnsafeConstantsFixup fixup;
4060 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4061 }
4062
4063 int java_lang_Class::_klass_offset;
4064 int java_lang_Class::_array_klass_offset;
4065 int java_lang_Class::_oop_size_offset;
4066 int java_lang_Class::_static_oop_field_count_offset;
4067 int java_lang_Class::_class_loader_offset;
4068 int java_lang_Class::_module_offset;
4069 int java_lang_Class::_protection_domain_offset;
4070 int java_lang_Class::_component_mirror_offset;
4071 int java_lang_Class::_init_lock_offset;
4072 int java_lang_Class::_signers_offset;
4073 int java_lang_Class::_name_offset;
4074 int java_lang_Class::_source_file_offset;
4075 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4076 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4077 int java_lang_Throwable::backtrace_offset;
4078 int java_lang_Throwable::detailMessage_offset;
4079 int java_lang_Throwable::stackTrace_offset;
4080 int java_lang_Throwable::depth_offset;
4081 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4082 int java_lang_reflect_AccessibleObject::override_offset;
4083 int java_lang_reflect_Method::clazz_offset;
4084 int java_lang_reflect_Method::name_offset;
4085 int java_lang_reflect_Method::returnType_offset;
4086 int java_lang_reflect_Method::parameterTypes_offset;
4087 int java_lang_reflect_Method::exceptionTypes_offset;
4088 int java_lang_reflect_Method::slot_offset;
4089 int java_lang_reflect_Method::modifiers_offset;
4090 int java_lang_reflect_Method::signature_offset;
4091 int java_lang_reflect_Method::annotations_offset;
4092 int java_lang_reflect_Method::parameter_annotations_offset;
4093 int java_lang_reflect_Method::annotation_default_offset;
4094 int java_lang_reflect_Constructor::clazz_offset;
4095 int java_lang_reflect_Constructor::parameterTypes_offset;
4096 int java_lang_reflect_Constructor::exceptionTypes_offset;
4097 int java_lang_reflect_Constructor::slot_offset;
4098 int java_lang_reflect_Constructor::modifiers_offset;
4099 int java_lang_reflect_Constructor::signature_offset;
4100 int java_lang_reflect_Constructor::annotations_offset;
4101 int java_lang_reflect_Constructor::parameter_annotations_offset;
4102 int java_lang_reflect_Field::clazz_offset;
4103 int java_lang_reflect_Field::name_offset;
4104 int java_lang_reflect_Field::type_offset;
4105 int java_lang_reflect_Field::slot_offset;
4106 int java_lang_reflect_Field::modifiers_offset;
4107 int java_lang_reflect_Field::signature_offset;
4108 int java_lang_reflect_Field::annotations_offset;
4109 int java_lang_reflect_Parameter::name_offset;
4110 int java_lang_reflect_Parameter::modifiers_offset;
4111 int java_lang_reflect_Parameter::index_offset;
4112 int java_lang_reflect_Parameter::executable_offset;
4113 int java_lang_boxing_object::value_offset;
4114 int java_lang_boxing_object::long_value_offset;
4115 int java_lang_ref_Reference::referent_offset;
4116 int java_lang_ref_Reference::queue_offset;
4117 int java_lang_ref_Reference::next_offset;
4118 int java_lang_ref_Reference::discovered_offset;
4119 int java_lang_ref_SoftReference::timestamp_offset;
4120 int java_lang_ref_SoftReference::static_clock_offset;
4121 int java_lang_ClassLoader::parent_offset;
4122 int java_lang_System::static_in_offset;
4123 int java_lang_System::static_out_offset;
4124 int java_lang_System::static_err_offset;
4125 int java_lang_System::static_security_offset;
4126 int java_lang_StackTraceElement::methodName_offset;
4127 int java_lang_StackTraceElement::fileName_offset;
4128 int java_lang_StackTraceElement::lineNumber_offset;
4129 int java_lang_StackTraceElement::moduleName_offset;
4130 int java_lang_StackTraceElement::moduleVersion_offset;
4131 int java_lang_StackTraceElement::classLoaderName_offset;
4132 int java_lang_StackTraceElement::declaringClass_offset;
4133 int java_lang_StackTraceElement::declaringClassObject_offset;
4134 int java_lang_StackFrameInfo::_memberName_offset;
4135 int java_lang_StackFrameInfo::_bci_offset;
4136 int java_lang_StackFrameInfo::_version_offset;
4137 int java_lang_LiveStackFrameInfo::_monitors_offset;
4138 int java_lang_LiveStackFrameInfo::_locals_offset;
4139 int java_lang_LiveStackFrameInfo::_operands_offset;
4140 int java_lang_LiveStackFrameInfo::_mode_offset;
4141 int java_lang_AssertionStatusDirectives::classes_offset;
4142 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4143 int java_lang_AssertionStatusDirectives::packages_offset;
4144 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4145 int java_lang_AssertionStatusDirectives::deflt_offset;
4146 int java_nio_Buffer::_limit_offset;
4147 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4148 int reflect_ConstantPool::_oop_offset;
4149 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4150 int java_lang_Integer_IntegerCache::_static_cache_offset;
4151 int java_lang_Long_LongCache::_static_cache_offset;
4152 int java_lang_Character_CharacterCache::_static_cache_offset;
4153 int java_lang_Short_ShortCache::_static_cache_offset;
4154 int java_lang_Byte_ByteCache::_static_cache_offset;
4155 int java_lang_Boolean::_static_TRUE_offset;
4156 int java_lang_Boolean::_static_FALSE_offset;
4157
4158
4159
4160 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4161 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4162 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4163 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4164 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4165 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4166 macro(methodName_offset, k, "methodName", string_signature, false); \
4167 macro(fileName_offset, k, "fileName", string_signature, false); \
4168 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4169
4170 // Support for java_lang_StackTraceElement
compute_offsets()4171 void java_lang_StackTraceElement::compute_offsets() {
4172 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4173 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4174 }
4175
4176 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4177 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4178 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4179 }
4180 #endif
4181
set_fileName(oop element,oop value)4182 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4183 element->obj_field_put(fileName_offset, value);
4184 }
4185
set_declaringClass(oop element,oop value)4186 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4187 element->obj_field_put(declaringClass_offset, value);
4188 }
4189
set_methodName(oop element,oop value)4190 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4191 element->obj_field_put(methodName_offset, value);
4192 }
4193
set_lineNumber(oop element,int value)4194 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4195 element->int_field_put(lineNumber_offset, value);
4196 }
4197
set_moduleName(oop element,oop value)4198 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4199 element->obj_field_put(moduleName_offset, value);
4200 }
4201
set_moduleVersion(oop element,oop value)4202 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4203 element->obj_field_put(moduleVersion_offset, value);
4204 }
4205
set_classLoaderName(oop element,oop value)4206 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4207 element->obj_field_put(classLoaderName_offset, value);
4208 }
4209
set_declaringClassObject(oop element,oop value)4210 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4211 element->obj_field_put(declaringClassObject_offset, value);
4212 }
4213
set_version(oop element,short value)4214 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4215 element->short_field_put(_version_offset, value);
4216 }
4217
set_bci(oop element,int value)4218 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4219 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
4220 element->int_field_put(_bci_offset, value);
4221 }
4222
set_monitors(oop element,oop value)4223 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4224 element->obj_field_put(_monitors_offset, value);
4225 }
4226
set_locals(oop element,oop value)4227 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4228 element->obj_field_put(_locals_offset, value);
4229 }
4230
set_operands(oop element,oop value)4231 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4232 element->obj_field_put(_operands_offset, value);
4233 }
4234
set_mode(oop element,int value)4235 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4236 element->int_field_put(_mode_offset, value);
4237 }
4238
4239 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4240 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4241 macro(classes_offset, k, "classes", string_array_signature, false); \
4242 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4243 macro(packages_offset, k, "packages", string_array_signature, false); \
4244 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4245 macro(deflt_offset, k, "deflt", bool_signature, false)
4246
compute_offsets()4247 void java_lang_AssertionStatusDirectives::compute_offsets() {
4248 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4249 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4250 }
4251
4252 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4253 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4254 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4255 }
4256 #endif
4257
set_classes(oop o,oop val)4258 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4259 o->obj_field_put(classes_offset, val);
4260 }
4261
set_classEnabled(oop o,oop val)4262 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4263 o->obj_field_put(classEnabled_offset, val);
4264 }
4265
set_packages(oop o,oop val)4266 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4267 o->obj_field_put(packages_offset, val);
4268 }
4269
set_packageEnabled(oop o,oop val)4270 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4271 o->obj_field_put(packageEnabled_offset, val);
4272 }
4273
set_deflt(oop o,bool val)4274 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4275 o->bool_field_put(deflt_offset, val);
4276 }
4277
4278
4279 // Support for intrinsification of java.nio.Buffer.checkIndex
limit_offset()4280 int java_nio_Buffer::limit_offset() {
4281 return _limit_offset;
4282 }
4283
4284 #define BUFFER_FIELDS_DO(macro) \
4285 macro(_limit_offset, k, "limit", int_signature, false)
4286
compute_offsets()4287 void java_nio_Buffer::compute_offsets() {
4288 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4289 assert(k != NULL, "must be loaded in 1.4+");
4290 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4291 }
4292
4293 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4294 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4295 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4296 }
4297 #endif
4298
4299 #define AOS_FIELDS_DO(macro) \
4300 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4301
compute_offsets()4302 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4303 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4304 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4305 }
4306
get_owner_threadObj(oop obj)4307 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4308 assert(_owner_offset != 0, "Must be initialized");
4309 return obj->obj_field(_owner_offset);
4310 }
4311
4312 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4313 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4314 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4315 }
4316 #endif
4317
4318 #define INTEGER_CACHE_FIELDS_DO(macro) \
4319 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4320
compute_offsets(InstanceKlass * k)4321 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4322 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4323 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4324 }
4325
cache(InstanceKlass * ik)4326 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4327 oop base = ik->static_field_base_raw();
4328 return objArrayOop(base->obj_field(_static_cache_offset));
4329 }
4330
symbol()4331 Symbol* java_lang_Integer_IntegerCache::symbol() {
4332 return vmSymbols::java_lang_Integer_IntegerCache();
4333 }
4334
4335 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4336 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4337 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4338 }
4339 #endif
4340 #undef INTEGER_CACHE_FIELDS_DO
4341
value(oop obj)4342 jint java_lang_Integer::value(oop obj) {
4343 jvalue v;
4344 java_lang_boxing_object::get_value(obj, &v);
4345 return v.i;
4346 }
4347
4348 #define LONG_CACHE_FIELDS_DO(macro) \
4349 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4350
compute_offsets(InstanceKlass * k)4351 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4352 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4353 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4354 }
4355
cache(InstanceKlass * ik)4356 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4357 oop base = ik->static_field_base_raw();
4358 return objArrayOop(base->obj_field(_static_cache_offset));
4359 }
4360
symbol()4361 Symbol* java_lang_Long_LongCache::symbol() {
4362 return vmSymbols::java_lang_Long_LongCache();
4363 }
4364
4365 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4366 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4367 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4368 }
4369 #endif
4370 #undef LONG_CACHE_FIELDS_DO
4371
value(oop obj)4372 jlong java_lang_Long::value(oop obj) {
4373 jvalue v;
4374 java_lang_boxing_object::get_value(obj, &v);
4375 return v.j;
4376 }
4377
4378 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4379 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4380
compute_offsets(InstanceKlass * k)4381 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4382 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4383 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4384 }
4385
cache(InstanceKlass * ik)4386 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4387 oop base = ik->static_field_base_raw();
4388 return objArrayOop(base->obj_field(_static_cache_offset));
4389 }
4390
symbol()4391 Symbol* java_lang_Character_CharacterCache::symbol() {
4392 return vmSymbols::java_lang_Character_CharacterCache();
4393 }
4394
4395 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4396 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4397 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4398 }
4399 #endif
4400 #undef CHARACTER_CACHE_FIELDS_DO
4401
value(oop obj)4402 jchar java_lang_Character::value(oop obj) {
4403 jvalue v;
4404 java_lang_boxing_object::get_value(obj, &v);
4405 return v.c;
4406 }
4407
4408 #define SHORT_CACHE_FIELDS_DO(macro) \
4409 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4410
compute_offsets(InstanceKlass * k)4411 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4412 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4413 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4414 }
4415
cache(InstanceKlass * ik)4416 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4417 oop base = ik->static_field_base_raw();
4418 return objArrayOop(base->obj_field(_static_cache_offset));
4419 }
4420
symbol()4421 Symbol* java_lang_Short_ShortCache::symbol() {
4422 return vmSymbols::java_lang_Short_ShortCache();
4423 }
4424
4425 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4426 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
4427 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4428 }
4429 #endif
4430 #undef SHORT_CACHE_FIELDS_DO
4431
value(oop obj)4432 jshort java_lang_Short::value(oop obj) {
4433 jvalue v;
4434 java_lang_boxing_object::get_value(obj, &v);
4435 return v.s;
4436 }
4437
4438 #define BYTE_CACHE_FIELDS_DO(macro) \
4439 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
4440
compute_offsets(InstanceKlass * k)4441 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
4442 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4443 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4444 }
4445
cache(InstanceKlass * ik)4446 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
4447 oop base = ik->static_field_base_raw();
4448 return objArrayOop(base->obj_field(_static_cache_offset));
4449 }
4450
symbol()4451 Symbol* java_lang_Byte_ByteCache::symbol() {
4452 return vmSymbols::java_lang_Byte_ByteCache();
4453 }
4454
4455 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4456 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
4457 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4458 }
4459 #endif
4460 #undef BYTE_CACHE_FIELDS_DO
4461
value(oop obj)4462 jbyte java_lang_Byte::value(oop obj) {
4463 jvalue v;
4464 java_lang_boxing_object::get_value(obj, &v);
4465 return v.b;
4466 }
4467 #define BOOLEAN_FIELDS_DO(macro) \
4468 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
4469 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
4470
4471
compute_offsets(InstanceKlass * k)4472 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
4473 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4474 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4475 }
4476
get_TRUE(InstanceKlass * ik)4477 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
4478 oop base = ik->static_field_base_raw();
4479 return base->obj_field(_static_TRUE_offset);
4480 }
4481
get_FALSE(InstanceKlass * ik)4482 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
4483 oop base = ik->static_field_base_raw();
4484 return base->obj_field(_static_FALSE_offset);
4485 }
4486
symbol()4487 Symbol* java_lang_Boolean::symbol() {
4488 return vmSymbols::java_lang_Boolean();
4489 }
4490
4491 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4492 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
4493 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4494 }
4495 #endif
4496 #undef BOOLEAN_CACHE_FIELDS_DO
4497
value(oop obj)4498 jboolean java_lang_Boolean::value(oop obj) {
4499 jvalue v;
4500 java_lang_boxing_object::get_value(obj, &v);
4501 return v.z;
4502 }
4503
member_offset(int hardcoded_offset)4504 static int member_offset(int hardcoded_offset) {
4505 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4506 }
4507
4508 // Compute hard-coded offsets
4509 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4510 // are not available to determine the offset_of_static_fields.
compute_hard_coded_offsets()4511 void JavaClasses::compute_hard_coded_offsets() {
4512
4513 // java_lang_boxing_object
4514 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4515 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4516
4517 // java_lang_ref_Reference
4518 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4519 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4520 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4521 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4522 }
4523
4524 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4525
4526 // Compute non-hard-coded field offsets of all the classes in this file
compute_offsets()4527 void JavaClasses::compute_offsets() {
4528 if (UseSharedSpaces) {
4529 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4530 JvmtiExport::has_early_class_hook_env()),
4531 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4532 // None of the classes used by the rest of this function can be replaced by
4533 // JMVTI ClassFileLoadHook.
4534 // We are safe to use the archived offsets, which have already been restored
4535 // by JavaClasses::serialize_offsets, without computing the offsets again.
4536 return;
4537 }
4538
4539 // We have already called the compute_offsets() of the
4540 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4541 // earlier inside SystemDictionary::resolve_well_known_classes()
4542 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4543
4544 // generated interpreter code wants to know about the offsets we just computed:
4545 AbstractAssembler::update_delayed_values();
4546 }
4547
4548 #if INCLUDE_CDS
4549 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4550
serialize_offsets(SerializeClosure * soc)4551 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4552 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4553 }
4554 #endif
4555
4556
4557 #ifndef PRODUCT
4558
4559 // These functions exist to assert the validity of hard-coded field offsets to guard
4560 // against changes in the class files
4561
check_offset(const char * klass_name,int hardcoded_offset,const char * field_name,const char * field_sig)4562 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4563 EXCEPTION_MARK;
4564 fieldDescriptor fd;
4565 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
4566 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4567 InstanceKlass* ik = InstanceKlass::cast(k);
4568 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
4569 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
4570 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4571 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4572 return false;
4573 }
4574 if (fd.is_static()) {
4575 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4576 return false;
4577 }
4578 if (fd.offset() == hardcoded_offset ) {
4579 return true;
4580 } else {
4581 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4582 klass_name, field_name, hardcoded_offset, fd.offset());
4583 return false;
4584 }
4585 }
4586
4587 // Check the hard-coded field offsets of all the classes in this file
4588
check_offsets()4589 void JavaClasses::check_offsets() {
4590 bool valid = true;
4591
4592 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4593 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4594
4595 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4596 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4597
4598 // Boxed primitive objects (java_lang_boxing_object)
4599
4600 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4601 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4602 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4603 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4604 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4605 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4606 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4607 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4608
4609 // java.lang.ref.Reference
4610
4611 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4612 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4613 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4614 // Fake field
4615 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4616
4617 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4618 }
4619
4620 #endif // PRODUCT
4621
compute_offset()4622 int InjectedField::compute_offset() {
4623 InstanceKlass* ik = InstanceKlass::cast(klass());
4624 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4625 if (!may_be_java && !fs.access_flags().is_internal()) {
4626 // Only look at injected fields
4627 continue;
4628 }
4629 if (fs.name() == name() && fs.signature() == signature()) {
4630 return fs.offset();
4631 }
4632 }
4633 ResourceMark rm;
4634 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)" : "");
4635 #ifndef PRODUCT
4636 ik->print();
4637 tty->print_cr("all fields:");
4638 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4639 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4640 }
4641 #endif //PRODUCT
4642 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4643 return -1;
4644 }
4645
javaClasses_init()4646 void javaClasses_init() {
4647 JavaClasses::compute_offsets();
4648 JavaClasses::check_offsets();
4649 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4650 }
4651