1 /*
2 * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/classLoaderData.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/debugInfo.hpp"
33 #include "code/dependencyContext.hpp"
34 #include "code/pcDesc.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "logging/log.hpp"
38 #include "logging/logStream.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/metaspaceShared.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "memory/universe.hpp"
43 #include "oops/fieldStreams.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceMirrorKlass.hpp"
46 #include "oops/klass.hpp"
47 #include "oops/method.inline.hpp"
48 #include "oops/objArrayOop.inline.hpp"
49 #include "oops/oop.inline.hpp"
50 #include "oops/symbol.hpp"
51 #include "oops/typeArrayOop.inline.hpp"
52 #include "prims/jvmtiExport.hpp"
53 #include "prims/resolvedMethodTable.hpp"
54 #include "runtime/fieldDescriptor.inline.hpp"
55 #include "runtime/frame.inline.hpp"
56 #include "runtime/handles.inline.hpp"
57 #include "runtime/interfaceSupport.inline.hpp"
58 #include "runtime/java.hpp"
59 #include "runtime/javaCalls.hpp"
60 #include "runtime/jniHandles.inline.hpp"
61 #include "runtime/safepoint.hpp"
62 #include "runtime/safepointVerifiers.hpp"
63 #include "runtime/thread.inline.hpp"
64 #include "runtime/vframe.inline.hpp"
65 #include "utilities/align.hpp"
66 #include "utilities/preserveException.hpp"
67 #if INCLUDE_JVMCI
68 #include "jvmci/jvmciJavaClasses.hpp"
69 #endif
70
71 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
72 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
73
74 #if INCLUDE_CDS
75 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
76 f->do_u4((u4*)&_##name##_offset);
77 #endif
78
79 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
80 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
81
82 InjectedField JavaClasses::_injected_fields[] = {
83 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
84 };
85
compute_injected_offset(InjectedFieldID id)86 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
87 return _injected_fields[id].compute_offset();
88 }
89
90
get_injected(Symbol * class_name,int * field_count)91 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
92 *field_count = 0;
93
94 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
95 if (sid == vmSymbols::NO_SID) {
96 // Only well known classes can inject fields
97 return NULL;
98 }
99
100 int count = 0;
101 int start = -1;
102
103 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
104 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
105 count++; \
106 if (start == -1) start = klass##_##name##_enum; \
107 }
108 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
109 #undef LOOKUP_INJECTED_FIELD
110
111 if (start != -1) {
112 *field_count = count;
113 return _injected_fields + start;
114 }
115 return NULL;
116 }
117
118
119 // Helpful routine for computing field offsets at run time rather than hardcoding them
120 // Finds local fields only, including static fields. Static field offsets are from the
121 // beginning of the mirror.
compute_offset(int & dest_offset,InstanceKlass * ik,Symbol * name_symbol,Symbol * signature_symbol,bool is_static=false)122 static void compute_offset(int &dest_offset,
123 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
124 bool is_static = false) {
125 fieldDescriptor fd;
126 if (ik == NULL) {
127 ResourceMark rm;
128 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
129 vm_exit_during_initialization("Invalid layout of well-known class");
130 }
131
132 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
133 ResourceMark rm;
134 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
135 name_symbol->as_C_string(), signature_symbol->as_C_string());
136 #ifndef PRODUCT
137 // Prints all fields and offsets
138 Log(class) lt;
139 LogStream ls(lt.error());
140 ik->print_on(&ls);
141 #endif //PRODUCT
142 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
143 }
144 dest_offset = fd.offset();
145 }
146
147 // 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)148 static void compute_offset(int& dest_offset, InstanceKlass* ik,
149 const char* name_string, Symbol* signature_symbol,
150 bool is_static = false) {
151 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
152 if (name == NULL) {
153 ResourceMark rm;
154 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
155 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
156 }
157 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
158 }
159
160 // Same as above but for "optional" offsets that might not be present in certain JDK versions
161 // Old versions should be cleaned out since Hotspot only supports the current JDK, and this
162 // function should be removed.
163 static void
compute_optional_offset(int & dest_offset,InstanceKlass * ik,Symbol * name_symbol,Symbol * signature_symbol)164 compute_optional_offset(int& dest_offset,
165 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol) {
166 fieldDescriptor fd;
167 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) {
168 dest_offset = fd.offset();
169 }
170 }
171
172 int java_lang_String::value_offset = 0;
173 int java_lang_String::hash_offset = 0;
174 int java_lang_String::coder_offset = 0;
175
176 bool java_lang_String::initialized = false;
177
is_instance(oop obj)178 bool java_lang_String::is_instance(oop obj) {
179 return is_instance_inlined(obj);
180 }
181
182 #if INCLUDE_CDS
183 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
184 f->do_u4((u4*)&offset)
185
186 #define FIELD_SERIALIZE_OFFSET_OPTIONAL(offset, klass, name, signature) \
187 f->do_u4((u4*)&offset)
188 #endif
189
190 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
191 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
192
193 #define FIELD_COMPUTE_OFFSET_OPTIONAL(offset, klass, name, signature) \
194 compute_optional_offset(offset, klass, name, vmSymbols::signature())
195
196 #define STRING_FIELDS_DO(macro) \
197 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
198 macro(hash_offset, k, "hash", int_signature, false); \
199 macro(coder_offset, k, "coder", byte_signature, false)
200
compute_offsets()201 void java_lang_String::compute_offsets() {
202 if (initialized) {
203 return;
204 }
205
206 InstanceKlass* k = SystemDictionary::String_klass();
207 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
208
209 initialized = true;
210 }
211
212 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)213 void java_lang_String::serialize_offsets(SerializeClosure* f) {
214 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
215 f->do_bool(&initialized);
216 }
217 #endif
218
219 class CompactStringsFixup : public FieldClosure {
220 private:
221 bool _value;
222
223 public:
CompactStringsFixup(bool value)224 CompactStringsFixup(bool value) : _value(value) {}
225
do_field(fieldDescriptor * fd)226 void do_field(fieldDescriptor* fd) {
227 if (fd->name() == vmSymbols::compact_strings_name()) {
228 oop mirror = fd->field_holder()->java_mirror();
229 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
230 assert(mirror != NULL, "String must have mirror already");
231 mirror->bool_field_put(fd->offset(), _value);
232 }
233 }
234 };
235
set_compact_strings(bool value)236 void java_lang_String::set_compact_strings(bool value) {
237 CompactStringsFixup fix(value);
238 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
239 }
240
basic_create(int length,bool is_latin1,TRAPS)241 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
242 assert(initialized, "Must be initialized");
243 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
244
245 // Create the String object first, so there's a chance that the String
246 // and the char array it points to end up in the same cache line.
247 oop obj;
248 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
249
250 // Create the char array. The String object must be handlized here
251 // because GC can happen as a result of the allocation attempt.
252 Handle h_obj(THREAD, obj);
253 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
254 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
255
256 // Point the String at the char array
257 obj = h_obj();
258 set_value(obj, buffer);
259 // No need to zero the offset, allocation zero'ed the entire String object
260 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
261 return h_obj;
262 }
263
create_from_unicode(jchar * unicode,int length,TRAPS)264 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
265 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
266 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
267 typeArrayOop buffer = value(h_obj());
268 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
269 if (is_latin1) {
270 for (int index = 0; index < length; index++) {
271 buffer->byte_at_put(index, (jbyte)unicode[index]);
272 }
273 } else {
274 for (int index = 0; index < length; index++) {
275 buffer->char_at_put(index, unicode[index]);
276 }
277 }
278
279 #ifdef ASSERT
280 {
281 ResourceMark rm;
282 char* expected = UNICODE::as_utf8(unicode, length);
283 char* actual = as_utf8_string(h_obj());
284 if (strcmp(expected, actual) != 0) {
285 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
286 ShouldNotReachHere();
287 }
288 }
289 #endif
290
291 return h_obj;
292 }
293
create_oop_from_unicode(jchar * unicode,int length,TRAPS)294 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
295 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
296 return h_obj();
297 }
298
create_from_str(const char * utf8_str,TRAPS)299 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
300 if (utf8_str == NULL) {
301 return Handle();
302 }
303 bool has_multibyte, is_latin1;
304 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
305 if (!CompactStrings) {
306 has_multibyte = true;
307 is_latin1 = false;
308 }
309
310 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
311 if (length > 0) {
312 if (!has_multibyte) {
313 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
314 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
315 } else if (is_latin1) {
316 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
317 } else {
318 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
319 }
320 }
321
322 #ifdef ASSERT
323 // This check is too strict because the input string is not necessarily valid UTF8.
324 // For example, it may be created with arbitrary content via jni_NewStringUTF.
325 /*
326 {
327 ResourceMark rm;
328 const char* expected = utf8_str;
329 char* actual = as_utf8_string(h_obj());
330 if (strcmp(expected, actual) != 0) {
331 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
332 ShouldNotReachHere();
333 }
334 }
335 */
336 #endif
337
338 return h_obj;
339 }
340
create_oop_from_str(const char * utf8_str,TRAPS)341 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
342 Handle h_obj = create_from_str(utf8_str, CHECK_0);
343 return h_obj();
344 }
345
create_from_symbol(Symbol * symbol,TRAPS)346 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
347 const char* utf8_str = (char*)symbol->bytes();
348 int utf8_len = symbol->utf8_length();
349
350 bool has_multibyte, is_latin1;
351 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
352 if (!CompactStrings) {
353 has_multibyte = true;
354 is_latin1 = false;
355 }
356
357 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
358 if (length > 0) {
359 if (!has_multibyte) {
360 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
361 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
362 } else if (is_latin1) {
363 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
364 } else {
365 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
366 }
367 }
368
369 #ifdef ASSERT
370 {
371 ResourceMark rm;
372 const char* expected = symbol->as_utf8();
373 char* actual = as_utf8_string(h_obj());
374 if (strncmp(expected, actual, utf8_len) != 0) {
375 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
376 ShouldNotReachHere();
377 }
378 }
379 #endif
380
381 return h_obj;
382 }
383
384 // Converts a C string to a Java String based on current encoding
create_from_platform_dependent_str(const char * str,TRAPS)385 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
386 assert(str != NULL, "bad arguments");
387
388 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
389 static to_java_string_fn_t _to_java_string_fn = NULL;
390
391 if (_to_java_string_fn == NULL) {
392 void *lib_handle = os::native_java_library();
393 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
394 if (_to_java_string_fn == NULL) {
395 fatal("NewStringPlatform missing");
396 }
397 }
398
399 jstring js = NULL;
400 { JavaThread* thread = (JavaThread*)THREAD;
401 assert(thread->is_Java_thread(), "must be java thread");
402 HandleMark hm(thread);
403 ThreadToNativeFromVM ttn(thread);
404 js = (_to_java_string_fn)(thread->jni_environment(), str);
405 }
406 return Handle(THREAD, JNIHandles::resolve(js));
407 }
408
409 // Converts a Java String to a native C string that can be used for
410 // native OS calls.
as_platform_dependent_str(Handle java_string,TRAPS)411 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
412 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
413 static to_platform_string_fn_t _to_platform_string_fn = NULL;
414
415 if (_to_platform_string_fn == NULL) {
416 void *lib_handle = os::native_java_library();
417 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
418 if (_to_platform_string_fn == NULL) {
419 fatal("GetStringPlatformChars missing");
420 }
421 }
422
423 char *native_platform_string;
424 { JavaThread* thread = (JavaThread*)THREAD;
425 assert(thread->is_Java_thread(), "must be java thread");
426 JNIEnv *env = thread->jni_environment();
427 jstring js = (jstring) JNIHandles::make_local(env, java_string());
428 bool is_copy;
429 HandleMark hm(thread);
430 ThreadToNativeFromVM ttn(thread);
431 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
432 assert(is_copy == JNI_TRUE, "is_copy value changed");
433 JNIHandles::destroy_local(js);
434 }
435 return native_platform_string;
436 }
437
char_converter(Handle java_string,jchar from_char,jchar to_char,TRAPS)438 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
439 oop obj = java_string();
440 // Typical usage is to convert all '/' to '.' in string.
441 typeArrayOop value = java_lang_String::value(obj);
442 int length = java_lang_String::length(obj);
443 bool is_latin1 = java_lang_String::is_latin1(obj);
444
445 // First check if any from_char exist
446 int index; // Declared outside, used later
447 for (index = 0; index < length; index++) {
448 jchar c = !is_latin1 ? value->char_at(index) :
449 ((jchar) value->byte_at(index)) & 0xff;
450 if (c == from_char) {
451 break;
452 }
453 }
454 if (index == length) {
455 // No from_char, so do not copy.
456 return java_string;
457 }
458
459 // Check if result string will be latin1
460 bool to_is_latin1 = false;
461
462 // Replacement char must be latin1
463 if (CompactStrings && UNICODE::is_latin1(to_char)) {
464 if (is_latin1) {
465 // Source string is latin1 as well
466 to_is_latin1 = true;
467 } else if (!UNICODE::is_latin1(from_char)) {
468 // We are replacing an UTF16 char. Scan string to
469 // check if result can be latin1 encoded.
470 to_is_latin1 = true;
471 for (index = 0; index < length; index++) {
472 jchar c = value->char_at(index);
473 if (c != from_char && !UNICODE::is_latin1(c)) {
474 to_is_latin1 = false;
475 break;
476 }
477 }
478 }
479 }
480
481 // Create new UNICODE (or byte) buffer. Must handlize value because GC
482 // may happen during String and char array creation.
483 typeArrayHandle h_value(THREAD, value);
484 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
485 typeArrayOop from_buffer = h_value();
486 typeArrayOop to_buffer = java_lang_String::value(string());
487
488 // Copy contents
489 for (index = 0; index < length; index++) {
490 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
491 ((jchar) from_buffer->byte_at(index)) & 0xff;
492 if (c == from_char) {
493 c = to_char;
494 }
495 if (!to_is_latin1) {
496 to_buffer->char_at_put(index, c);
497 } else {
498 to_buffer->byte_at_put(index, (jbyte) c);
499 }
500 }
501 return string;
502 }
503
as_unicode_string(oop java_string,int & length,TRAPS)504 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
505 typeArrayOop value = java_lang_String::value(java_string);
506 length = java_lang_String::length(java_string);
507 bool is_latin1 = java_lang_String::is_latin1(java_string);
508
509 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
510 if (result != NULL) {
511 if (!is_latin1) {
512 for (int index = 0; index < length; index++) {
513 result[index] = value->char_at(index);
514 }
515 } else {
516 for (int index = 0; index < length; index++) {
517 result[index] = ((jchar) value->byte_at(index)) & 0xff;
518 }
519 }
520 } else {
521 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
522 }
523 return result;
524 }
525
hash_code(oop java_string)526 unsigned int java_lang_String::hash_code(oop java_string) {
527 int length = java_lang_String::length(java_string);
528 // Zero length string will hash to zero with String.hashCode() function.
529 if (length == 0) return 0;
530
531 typeArrayOop value = java_lang_String::value(java_string);
532 bool is_latin1 = java_lang_String::is_latin1(java_string);
533
534 if (is_latin1) {
535 return java_lang_String::hash_code(value->byte_at_addr(0), length);
536 } else {
537 return java_lang_String::hash_code(value->char_at_addr(0), length);
538 }
539 }
540
as_quoted_ascii(oop java_string)541 char* java_lang_String::as_quoted_ascii(oop java_string) {
542 typeArrayOop value = java_lang_String::value(java_string);
543 int length = java_lang_String::length(java_string);
544 bool is_latin1 = java_lang_String::is_latin1(java_string);
545
546 if (length == 0) return NULL;
547
548 char* result;
549 int result_length;
550 if (!is_latin1) {
551 jchar* base = value->char_at_addr(0);
552 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
553 result = NEW_RESOURCE_ARRAY(char, result_length);
554 UNICODE::as_quoted_ascii(base, length, result, result_length);
555 } else {
556 jbyte* base = value->byte_at_addr(0);
557 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
558 result = NEW_RESOURCE_ARRAY(char, result_length);
559 UNICODE::as_quoted_ascii(base, length, result, result_length);
560 }
561 assert(result_length >= length + 1, "must not be shorter");
562 assert(result_length == (int)strlen(result) + 1, "must match");
563 return result;
564 }
565
as_symbol(oop java_string,TRAPS)566 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
567 typeArrayOop value = java_lang_String::value(java_string);
568 int length = java_lang_String::length(java_string);
569 bool is_latin1 = java_lang_String::is_latin1(java_string);
570 if (!is_latin1) {
571 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
572 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
573 return sym;
574 } else {
575 ResourceMark rm;
576 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
577 const char* base = UNICODE::as_utf8(position, length);
578 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
579 return sym;
580 }
581 }
582
as_symbol_or_null(oop java_string)583 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
584 typeArrayOop value = java_lang_String::value(java_string);
585 int length = java_lang_String::length(java_string);
586 bool is_latin1 = java_lang_String::is_latin1(java_string);
587 if (!is_latin1) {
588 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
589 return SymbolTable::probe_unicode(base, length);
590 } else {
591 ResourceMark rm;
592 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
593 const char* base = UNICODE::as_utf8(position, length);
594 return SymbolTable::probe(base, length);
595 }
596 }
597
utf8_length(oop java_string)598 int java_lang_String::utf8_length(oop java_string) {
599 typeArrayOop value = java_lang_String::value(java_string);
600 int length = java_lang_String::length(java_string);
601 bool is_latin1 = java_lang_String::is_latin1(java_string);
602 if (length == 0) {
603 return 0;
604 }
605 if (!is_latin1) {
606 return UNICODE::utf8_length(value->char_at_addr(0), length);
607 } else {
608 return UNICODE::utf8_length(value->byte_at_addr(0), length);
609 }
610 }
611
as_utf8_string(oop java_string)612 char* java_lang_String::as_utf8_string(oop java_string) {
613 typeArrayOop value = java_lang_String::value(java_string);
614 int length = java_lang_String::length(java_string);
615 bool is_latin1 = java_lang_String::is_latin1(java_string);
616 if (!is_latin1) {
617 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
618 return UNICODE::as_utf8(position, length);
619 } else {
620 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
621 return UNICODE::as_utf8(position, length);
622 }
623 }
624
as_utf8_string(oop java_string,char * buf,int buflen)625 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
626 typeArrayOop value = java_lang_String::value(java_string);
627 int length = java_lang_String::length(java_string);
628 bool is_latin1 = java_lang_String::is_latin1(java_string);
629 if (!is_latin1) {
630 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
631 return UNICODE::as_utf8(position, length, buf, buflen);
632 } else {
633 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
634 return UNICODE::as_utf8(position, length, buf, buflen);
635 }
636 }
637
as_utf8_string(oop java_string,int start,int len)638 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
639 typeArrayOop value = java_lang_String::value(java_string);
640 int length = java_lang_String::length(java_string);
641 assert(start + len <= length, "just checking");
642 bool is_latin1 = java_lang_String::is_latin1(java_string);
643 if (!is_latin1) {
644 jchar* position = value->char_at_addr(start);
645 return UNICODE::as_utf8(position, len);
646 } else {
647 jbyte* position = value->byte_at_addr(start);
648 return UNICODE::as_utf8(position, len);
649 }
650 }
651
as_utf8_string(oop java_string,int start,int len,char * buf,int buflen)652 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
653 typeArrayOop value = java_lang_String::value(java_string);
654 int length = java_lang_String::length(java_string);
655 assert(start + len <= length, "just checking");
656 bool is_latin1 = java_lang_String::is_latin1(java_string);
657 if (!is_latin1) {
658 jchar* position = value->char_at_addr(start);
659 return UNICODE::as_utf8(position, len, buf, buflen);
660 } else {
661 jbyte* position = value->byte_at_addr(start);
662 return UNICODE::as_utf8(position, len, buf, buflen);
663 }
664 }
665
equals(oop java_string,jchar * chars,int len)666 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
667 assert(java_string->klass() == SystemDictionary::String_klass(),
668 "must be java_string");
669 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
670 int length = java_lang_String::length(java_string);
671 if (length != len) {
672 return false;
673 }
674 bool is_latin1 = java_lang_String::is_latin1(java_string);
675 if (!is_latin1) {
676 for (int i = 0; i < len; i++) {
677 if (value->char_at(i) != chars[i]) {
678 return false;
679 }
680 }
681 } else {
682 for (int i = 0; i < len; i++) {
683 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
684 return false;
685 }
686 }
687 }
688 return true;
689 }
690
equals(oop str1,oop str2)691 bool java_lang_String::equals(oop str1, oop str2) {
692 assert(str1->klass() == SystemDictionary::String_klass(),
693 "must be java String");
694 assert(str2->klass() == SystemDictionary::String_klass(),
695 "must be java String");
696 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
697 int length1 = java_lang_String::length(str1);
698 bool is_latin1 = java_lang_String::is_latin1(str1);
699 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
700 int length2 = java_lang_String::length(str2);
701 bool is_latin2 = java_lang_String::is_latin1(str2);
702
703 if ((length1 != length2) || (is_latin1 != is_latin2)) {
704 // Strings of different size or with different
705 // coders are never equal.
706 return false;
707 }
708 int blength1 = value1->length();
709 for (int i = 0; i < blength1; i++) {
710 if (value1->byte_at(i) != value2->byte_at(i)) {
711 return false;
712 }
713 }
714 return true;
715 }
716
print(oop java_string,outputStream * st)717 void java_lang_String::print(oop java_string, outputStream* st) {
718 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
719 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
720
721 if (value == NULL) {
722 // This can happen if, e.g., printing a String
723 // object before its initializer has been called
724 st->print("NULL");
725 return;
726 }
727
728 int length = java_lang_String::length(java_string);
729 bool is_latin1 = java_lang_String::is_latin1(java_string);
730
731 st->print("\"");
732 for (int index = 0; index < length; index++) {
733 st->print("%c", (!is_latin1) ? value->char_at(index) :
734 ((jchar) value->byte_at(index)) & 0xff );
735 }
736 st->print("\"");
737 }
738
739
initialize_static_field(fieldDescriptor * fd,Handle mirror,TRAPS)740 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
741 assert(mirror.not_null() && fd->is_static(), "just checking");
742 if (fd->has_initial_value()) {
743 BasicType t = fd->field_type();
744 switch (t) {
745 case T_BYTE:
746 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
747 break;
748 case T_BOOLEAN:
749 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
750 break;
751 case T_CHAR:
752 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
753 break;
754 case T_SHORT:
755 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
756 break;
757 case T_INT:
758 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
759 break;
760 case T_FLOAT:
761 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
762 break;
763 case T_DOUBLE:
764 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
765 break;
766 case T_LONG:
767 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
768 break;
769 case T_OBJECT:
770 {
771 assert(fd->signature() == vmSymbols::string_signature(),
772 "just checking");
773 if (DumpSharedSpaces && MetaspaceShared::is_archive_object(mirror())) {
774 // Archive the String field and update the pointer.
775 oop s = mirror()->obj_field(fd->offset());
776 oop archived_s = StringTable::create_archived_string(s, CHECK);
777 mirror()->obj_field_put(fd->offset(), archived_s);
778 } else {
779 oop string = fd->string_initial_value(CHECK);
780 mirror()->obj_field_put(fd->offset(), string);
781 }
782 }
783 break;
784 default:
785 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
786 "Illegal ConstantValue attribute in class file");
787 }
788 }
789 }
790
791
fixup_mirror(Klass * k,TRAPS)792 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
793 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
794
795 // If the offset was read from the shared archive, it was fixed up already
796 if (!k->is_shared()) {
797 if (k->is_instance_klass()) {
798 // During bootstrap, java.lang.Class wasn't loaded so static field
799 // offsets were computed without the size added it. Go back and
800 // update all the static field offsets to included the size.
801 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
802 if (fs.access_flags().is_static()) {
803 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
804 fs.set_offset(real_offset);
805 }
806 }
807 }
808 }
809
810 if (k->is_shared() && k->has_raw_archived_mirror()) {
811 if (MetaspaceShared::open_archive_heap_region_mapped()) {
812 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
813 assert(present, "Missing archived mirror for %s", k->external_name());
814 return;
815 } else {
816 k->set_java_mirror_handle(NULL);
817 k->clear_has_raw_archived_mirror();
818 }
819 }
820 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
821 }
822
initialize_mirror_fields(Klass * k,Handle mirror,Handle protection_domain,TRAPS)823 void java_lang_Class::initialize_mirror_fields(Klass* k,
824 Handle mirror,
825 Handle protection_domain,
826 TRAPS) {
827 // Allocate a simple java object for a lock.
828 // This needs to be a java object because during class initialization
829 // it can be held across a java call.
830 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
831 set_init_lock(mirror(), r);
832
833 // Set protection domain also
834 set_protection_domain(mirror(), protection_domain());
835
836 // Initialize static fields
837 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
838 }
839
840 // Set the java.lang.Module module field in the java_lang_Class mirror
set_mirror_module_field(Klass * k,Handle mirror,Handle module,TRAPS)841 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
842 if (module.is_null()) {
843 // During startup, the module may be NULL only if java.base has not been defined yet.
844 // Put the class on the fixup_module_list to patch later when the java.lang.Module
845 // for java.base is known.
846 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization");
847
848 bool javabase_was_defined = false;
849 {
850 MutexLocker m1(Module_lock, THREAD);
851 // Keep list of classes needing java.base module fixup
852 if (!ModuleEntryTable::javabase_defined()) {
853 assert(k->java_mirror() != NULL, "Class's mirror is null");
854 k->class_loader_data()->inc_keep_alive();
855 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
856 fixup_module_field_list()->push(k);
857 } else {
858 javabase_was_defined = true;
859 }
860 }
861
862 // If java.base was already defined then patch this particular class with java.base.
863 if (javabase_was_defined) {
864 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
865 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
866 "Setting class module field, " JAVA_BASE_NAME " should be defined");
867 Handle javabase_handle(THREAD, javabase_entry->module());
868 set_module(mirror(), javabase_handle());
869 }
870 } else {
871 assert(Universe::is_module_initialized() ||
872 (ModuleEntryTable::javabase_defined() &&
873 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
874 "Incorrect java.lang.Module specification while creating mirror");
875 set_module(mirror(), module());
876 }
877 }
878
879 // Statically allocate fixup lists because they always get created.
allocate_fixup_lists()880 void java_lang_Class::allocate_fixup_lists() {
881 GrowableArray<Klass*>* mirror_list =
882 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
883 set_fixup_mirror_list(mirror_list);
884
885 GrowableArray<Klass*>* module_list =
886 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
887 set_fixup_module_field_list(module_list);
888 }
889
create_mirror(Klass * k,Handle class_loader,Handle module,Handle protection_domain,TRAPS)890 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
891 Handle module, Handle protection_domain, TRAPS) {
892 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
893 assert(k->java_mirror() == NULL, "should only assign mirror once");
894
895 // Use this moment of initialization to cache modifier_flags also,
896 // to support Class.getModifiers(). Instance classes recalculate
897 // the cached flags after the class file is parsed, but before the
898 // class is put into the system dictionary.
899 int computed_modifiers = k->compute_modifier_flags(CHECK);
900 k->set_modifier_flags(computed_modifiers);
901 // Class_klass has to be loaded because it is used to allocate
902 // the mirror.
903 if (SystemDictionary::Class_klass_loaded()) {
904 // Allocate mirror (java.lang.Class instance)
905 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
906 Handle mirror(THREAD, mirror_oop);
907 Handle comp_mirror;
908
909 // Setup indirection from mirror->klass
910 java_lang_Class::set_klass(mirror(), k);
911
912 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
913 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
914
915 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
916
917 // It might also have a component mirror. This mirror must already exist.
918 if (k->is_array_klass()) {
919 if (k->is_typeArray_klass()) {
920 BasicType type = TypeArrayKlass::cast(k)->element_type();
921 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
922 } else {
923 assert(k->is_objArray_klass(), "Must be");
924 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
925 assert(element_klass != NULL, "Must have an element klass");
926 comp_mirror = Handle(THREAD, element_klass->java_mirror());
927 }
928 assert(comp_mirror() != NULL, "must have a mirror");
929
930 // Two-way link between the array klass and its component mirror:
931 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
932 set_component_mirror(mirror(), comp_mirror());
933 // See below for ordering dependencies between field array_klass in component mirror
934 // and java_mirror in this klass.
935 } else {
936 assert(k->is_instance_klass(), "Must be");
937
938 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
939 if (HAS_PENDING_EXCEPTION) {
940 // If any of the fields throws an exception like OOM remove the klass field
941 // from the mirror so GC doesn't follow it after the klass has been deallocated.
942 // This mirror looks like a primitive type, which logically it is because it
943 // it represents no class.
944 java_lang_Class::set_klass(mirror(), NULL);
945 return;
946 }
947 }
948
949 // set the classLoader field in the java_lang_Class instance
950 assert(class_loader() == k->class_loader(), "should be same");
951 set_class_loader(mirror(), class_loader());
952
953 // Setup indirection from klass->mirror
954 // after any exceptions can happen during allocations.
955 k->set_java_mirror(mirror);
956
957 // Set the module field in the java_lang_Class instance. This must be done
958 // after the mirror is set.
959 set_mirror_module_field(k, mirror, module, THREAD);
960
961 if (comp_mirror() != NULL) {
962 // Set after k->java_mirror() is published, because compiled code running
963 // concurrently doesn't expect a k to have a null java_mirror.
964 release_set_array_klass(comp_mirror(), k);
965 }
966 } else {
967 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
968 fixup_mirror_list()->push(k);
969 }
970 }
971
972 #if INCLUDE_CDS_JAVA_HEAP
973 // Clears mirror fields. Static final fields with initial values are reloaded
974 // from constant pool. The object identity hash is in the object header and is
975 // not affected.
976 class ResetMirrorField: public FieldClosure {
977 private:
978 Handle _m;
979
980 public:
ResetMirrorField(Handle mirror)981 ResetMirrorField(Handle mirror) : _m(mirror) {}
982
do_field(fieldDescriptor * fd)983 void do_field(fieldDescriptor* fd) {
984 assert(DumpSharedSpaces, "dump time only");
985 assert(_m.not_null(), "Mirror cannot be NULL");
986
987 if (fd->is_static() && fd->has_initial_value()) {
988 initialize_static_field(fd, _m, Thread::current());
989 return;
990 }
991
992 BasicType ft = fd->field_type();
993 switch (ft) {
994 case T_BYTE:
995 _m()->byte_field_put(fd->offset(), 0);
996 break;
997 case T_CHAR:
998 _m()->char_field_put(fd->offset(), 0);
999 break;
1000 case T_DOUBLE:
1001 _m()->double_field_put(fd->offset(), 0);
1002 break;
1003 case T_FLOAT:
1004 _m()->float_field_put(fd->offset(), 0);
1005 break;
1006 case T_INT:
1007 _m()->int_field_put(fd->offset(), 0);
1008 break;
1009 case T_LONG:
1010 _m()->long_field_put(fd->offset(), 0);
1011 break;
1012 case T_SHORT:
1013 _m()->short_field_put(fd->offset(), 0);
1014 break;
1015 case T_BOOLEAN:
1016 _m()->bool_field_put(fd->offset(), false);
1017 break;
1018 case T_ARRAY:
1019 case T_OBJECT: {
1020 // It might be useful to cache the String field, but
1021 // for now just clear out any reference field
1022 oop o = _m()->obj_field(fd->offset());
1023 _m()->obj_field_put(fd->offset(), NULL);
1024 break;
1025 }
1026 default:
1027 ShouldNotReachHere();
1028 break;
1029 }
1030 }
1031 };
1032
archive_basic_type_mirrors(TRAPS)1033 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1034 assert(MetaspaceShared::is_heap_object_archiving_allowed(),
1035 "MetaspaceShared::is_heap_object_archiving_allowed() must be true");
1036
1037 for (int t = 0; t <= T_VOID; t++) {
1038 oop m = Universe::_mirrors[t];
1039 if (m != NULL) {
1040 // Update the field at _array_klass_offset to point to the relocated array klass.
1041 oop archived_m = MetaspaceShared::archive_heap_object(m, THREAD);
1042 assert(archived_m != NULL, "sanity");
1043 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1044 assert(ak != NULL || t == T_VOID, "should not be NULL");
1045 if (ak != NULL) {
1046 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1047 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1048 }
1049
1050 // Clear the fields. Just to be safe
1051 Klass *k = m->klass();
1052 Handle archived_mirror_h(THREAD, archived_m);
1053 ResetMirrorField reset(archived_mirror_h);
1054 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1055
1056 log_trace(cds, heap, mirror)(
1057 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1058 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1059
1060 Universe::_mirrors[t] = archived_m;
1061 }
1062 }
1063
1064 assert(Universe::_mirrors[T_INT] != NULL &&
1065 Universe::_mirrors[T_FLOAT] != NULL &&
1066 Universe::_mirrors[T_DOUBLE] != NULL &&
1067 Universe::_mirrors[T_BYTE] != NULL &&
1068 Universe::_mirrors[T_BOOLEAN] != NULL &&
1069 Universe::_mirrors[T_CHAR] != NULL &&
1070 Universe::_mirrors[T_LONG] != NULL &&
1071 Universe::_mirrors[T_SHORT] != NULL &&
1072 Universe::_mirrors[T_VOID] != NULL, "sanity");
1073
1074 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1075 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1076 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1077 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1078 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1079 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1080 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1081 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1082 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1083 }
1084
1085 //
1086 // After the mirror object is successfully archived, the archived
1087 // klass is set with _has_archived_raw_mirror flag.
1088 //
1089 // The _has_archived_raw_mirror flag is cleared at runtime when the
1090 // archived mirror is restored. If archived java heap data cannot
1091 // be used at runtime, new mirror object is created for the shared
1092 // class. The _has_archived_raw_mirror is cleared also during the process.
archive_mirror(Klass * k,TRAPS)1093 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1094 assert(MetaspaceShared::is_heap_object_archiving_allowed(),
1095 "MetaspaceShared::is_heap_object_archiving_allowed() must be true");
1096
1097 // Mirror is already archived
1098 if (k->has_raw_archived_mirror()) {
1099 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1100 return k->archived_java_mirror_raw();
1101 }
1102
1103 // No mirror
1104 oop mirror = k->java_mirror();
1105 if (mirror == NULL) {
1106 return NULL;
1107 }
1108
1109 if (k->is_instance_klass()) {
1110 InstanceKlass *ik = InstanceKlass::cast(k);
1111 assert(ik->signers() == NULL && !k->has_signer_and_not_archived(),
1112 "class with signer cannot be supported");
1113
1114 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1115 ik->is_shared_app_class())) {
1116 // Archiving mirror for classes from non-builtin loaders is not
1117 // supported. Clear the _java_mirror within the archived class.
1118 k->set_java_mirror_handle(NULL);
1119 return NULL;
1120 }
1121 }
1122
1123 // Now start archiving the mirror object
1124 oop archived_mirror = MetaspaceShared::archive_heap_object(mirror, THREAD);
1125 if (archived_mirror == NULL) {
1126 return NULL;
1127 }
1128
1129 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1130 if (archived_mirror == NULL) {
1131 return NULL;
1132 }
1133
1134 k->set_archived_java_mirror_raw(archived_mirror);
1135
1136 k->set_has_raw_archived_mirror();
1137
1138 ResourceMark rm;
1139 log_trace(cds, heap, mirror)(
1140 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1141 k->external_name(), p2i(mirror), p2i(archived_mirror));
1142
1143 return archived_mirror;
1144 }
1145
1146 // The process is based on create_mirror().
process_archived_mirror(Klass * k,oop mirror,oop archived_mirror,Thread * THREAD)1147 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1148 oop archived_mirror,
1149 Thread *THREAD) {
1150 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1151 // to archived metadata and objects below.
1152 Klass *c = archived_mirror->klass();
1153 Handle archived_mirror_h(THREAD, archived_mirror);
1154 ResetMirrorField reset(archived_mirror_h);
1155 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1156
1157 if (k->is_array_klass()) {
1158 oop archived_comp_mirror;
1159 if (k->is_typeArray_klass()) {
1160 // The primitive type mirrors are already archived. Get the archived mirror.
1161 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1162 archived_comp_mirror = MetaspaceShared::find_archived_heap_object(comp_mirror);
1163 assert(archived_comp_mirror != NULL, "Must be");
1164 } else {
1165 assert(k->is_objArray_klass(), "Must be");
1166 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1167 assert(element_klass != NULL, "Must have an element klass");
1168 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1169 if (archived_comp_mirror == NULL) {
1170 return NULL;
1171 }
1172 }
1173 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1174 } else {
1175 assert(k->is_instance_klass(), "Must be");
1176
1177 // Reset local static fields in the mirror
1178 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1179
1180 java_lang_Class:set_init_lock(archived_mirror, NULL);
1181
1182 set_protection_domain(archived_mirror, NULL);
1183 }
1184
1185 // clear class loader and mirror_module_field
1186 set_class_loader(archived_mirror, NULL);
1187 set_module(archived_mirror, NULL);
1188
1189 // The archived mirror's field at _klass_offset is still pointing to the original
1190 // klass. Updated the field in the archived mirror to point to the relocated
1191 // klass in the archive.
1192 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1193 log_debug(cds, heap, mirror)(
1194 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1195 p2i(as_Klass(mirror)), p2i(reloc_k));
1196 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1197
1198 // The field at _array_klass_offset is pointing to the original one dimension
1199 // higher array klass if exists. Relocate the pointer.
1200 Klass *arr = array_klass_acquire(mirror);
1201 if (arr != NULL) {
1202 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1203 log_debug(cds, heap, mirror)(
1204 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1205 p2i(arr), p2i(reloc_arr));
1206 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1207 }
1208 return archived_mirror;
1209 }
1210
1211 // Returns true if the mirror is updated, false if no archived mirror
1212 // data is present. After the archived mirror object is restored, the
1213 // shared klass' _has_raw_archived_mirror flag is cleared.
restore_archived_mirror(Klass * k,Handle class_loader,Handle module,Handle protection_domain,TRAPS)1214 bool java_lang_Class::restore_archived_mirror(Klass *k,
1215 Handle class_loader, Handle module,
1216 Handle protection_domain, TRAPS) {
1217 oop m = MetaspaceShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1218
1219 if (m == NULL) {
1220 return false;
1221 }
1222
1223 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1224
1225 // mirror is archived, restore
1226 assert(MetaspaceShared::is_archive_object(m), "must be archived mirror object");
1227 Handle mirror(THREAD, m);
1228
1229 // The java.lang.Class field offsets were archived and reloaded from archive.
1230 // No need to put classes on the fixup_mirror_list before java.lang.Class
1231 // is loaded.
1232
1233 if (!k->is_array_klass()) {
1234 // - local static final fields with initial values were initialized at dump time
1235
1236 // create the init_lock
1237 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1238 set_init_lock(mirror(), r);
1239
1240 if (protection_domain.not_null()) {
1241 set_protection_domain(mirror(), protection_domain());
1242 }
1243 }
1244
1245 assert(class_loader() == k->class_loader(), "should be same");
1246 if (class_loader.not_null()) {
1247 set_class_loader(mirror(), class_loader());
1248 }
1249
1250 k->set_java_mirror(mirror);
1251 k->clear_has_raw_archived_mirror();
1252
1253 set_mirror_module_field(k, mirror, module, THREAD);
1254
1255 ResourceMark rm;
1256 log_trace(cds, heap, mirror)(
1257 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1258
1259 return true;
1260 }
1261 #endif // INCLUDE_CDS_JAVA_HEAP
1262
fixup_module_field(Klass * k,Handle module)1263 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1264 assert(_module_offset != 0, "must have been computed already");
1265 java_lang_Class::set_module(k->java_mirror(), module());
1266 }
1267
oop_size(oop java_class)1268 int java_lang_Class::oop_size(oop java_class) {
1269 assert(_oop_size_offset != 0, "must be set");
1270 int size = java_class->int_field(_oop_size_offset);
1271 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1272 return size;
1273 }
1274
set_oop_size(HeapWord * java_class,int size)1275 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1276 assert(_oop_size_offset != 0, "must be set");
1277 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1278 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1279 }
1280
static_oop_field_count(oop java_class)1281 int java_lang_Class::static_oop_field_count(oop java_class) {
1282 assert(_static_oop_field_count_offset != 0, "must be set");
1283 return java_class->int_field(_static_oop_field_count_offset);
1284 }
set_static_oop_field_count(oop java_class,int size)1285 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1286 assert(_static_oop_field_count_offset != 0, "must be set");
1287 java_class->int_field_put(_static_oop_field_count_offset, size);
1288 }
1289
protection_domain(oop java_class)1290 oop java_lang_Class::protection_domain(oop java_class) {
1291 assert(_protection_domain_offset != 0, "must be set");
1292 return java_class->obj_field(_protection_domain_offset);
1293 }
set_protection_domain(oop java_class,oop pd)1294 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1295 assert(_protection_domain_offset != 0, "must be set");
1296 java_class->obj_field_put(_protection_domain_offset, pd);
1297 }
1298
set_component_mirror(oop java_class,oop comp_mirror)1299 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1300 assert(_component_mirror_offset != 0, "must be set");
1301 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1302 }
component_mirror(oop java_class)1303 oop java_lang_Class::component_mirror(oop java_class) {
1304 assert(_component_mirror_offset != 0, "must be set");
1305 return java_class->obj_field(_component_mirror_offset);
1306 }
1307
init_lock(oop java_class)1308 oop java_lang_Class::init_lock(oop java_class) {
1309 assert(_init_lock_offset != 0, "must be set");
1310 return java_class->obj_field(_init_lock_offset);
1311 }
set_init_lock(oop java_class,oop init_lock)1312 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1313 assert(_init_lock_offset != 0, "must be set");
1314 java_class->obj_field_put(_init_lock_offset, init_lock);
1315 }
1316
signers(oop java_class)1317 objArrayOop java_lang_Class::signers(oop java_class) {
1318 assert(_signers_offset != 0, "must be set");
1319 return (objArrayOop)java_class->obj_field(_signers_offset);
1320 }
set_signers(oop java_class,objArrayOop signers)1321 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1322 assert(_signers_offset != 0, "must be set");
1323 java_class->obj_field_put(_signers_offset, (oop)signers);
1324 }
1325
1326
set_class_loader(oop java_class,oop loader)1327 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1328 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1329 if (_class_loader_offset != 0) {
1330 java_class->obj_field_put(_class_loader_offset, loader);
1331 }
1332 }
1333
class_loader(oop java_class)1334 oop java_lang_Class::class_loader(oop java_class) {
1335 assert(_class_loader_offset != 0, "must be set");
1336 return java_class->obj_field(_class_loader_offset);
1337 }
1338
module(oop java_class)1339 oop java_lang_Class::module(oop java_class) {
1340 assert(_module_offset != 0, "must be set");
1341 return java_class->obj_field(_module_offset);
1342 }
1343
set_module(oop java_class,oop module)1344 void java_lang_Class::set_module(oop java_class, oop module) {
1345 assert(_module_offset != 0, "must be set");
1346 java_class->obj_field_put(_module_offset, module);
1347 }
1348
name(Handle java_class,TRAPS)1349 oop java_lang_Class::name(Handle java_class, TRAPS) {
1350 assert(_name_offset != 0, "must be set");
1351 oop o = java_class->obj_field(_name_offset);
1352 if (o == NULL) {
1353 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1354 java_class->obj_field_put(_name_offset, o);
1355 }
1356 return o;
1357 }
1358
source_file(oop java_class)1359 oop java_lang_Class::source_file(oop java_class) {
1360 assert(_source_file_offset != 0, "must be set");
1361 return java_class->obj_field(_source_file_offset);
1362 }
1363
set_source_file(oop java_class,oop source_file)1364 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1365 assert(_source_file_offset != 0, "must be set");
1366 java_class->obj_field_put(_source_file_offset, source_file);
1367 }
1368
create_basic_type_mirror(const char * basic_type_name,BasicType type,TRAPS)1369 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1370 // This should be improved by adding a field at the Java level or by
1371 // introducing a new VM klass (see comment in ClassFileParser)
1372 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1373 if (type != T_VOID) {
1374 Klass* aklass = Universe::typeArrayKlassObj(type);
1375 assert(aklass != NULL, "correct bootstrap");
1376 release_set_array_klass(java_class, aklass);
1377 }
1378 #ifdef ASSERT
1379 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1380 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1381 #endif
1382 return java_class;
1383 }
1384
1385
as_Klass(oop java_class)1386 Klass* java_lang_Class::as_Klass(oop java_class) {
1387 //%note memory_2
1388 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1389 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1390 assert(k == NULL || k->is_klass(), "type check");
1391 return k;
1392 }
1393
1394
set_klass(oop java_class,Klass * klass)1395 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1396 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1397 java_class->metadata_field_put(_klass_offset, klass);
1398 }
1399
1400
print_signature(oop java_class,outputStream * st)1401 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1402 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1403 Symbol* name = NULL;
1404 bool is_instance = false;
1405 if (is_primitive(java_class)) {
1406 name = vmSymbols::type_signature(primitive_type(java_class));
1407 } else {
1408 Klass* k = as_Klass(java_class);
1409 is_instance = k->is_instance_klass();
1410 name = k->name();
1411 }
1412 if (name == NULL) {
1413 st->print("<null>");
1414 return;
1415 }
1416 if (is_instance) st->print("L");
1417 st->write((char*) name->base(), (int) name->utf8_length());
1418 if (is_instance) st->print(";");
1419 }
1420
as_signature(oop java_class,bool intern_if_not_found,TRAPS)1421 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1422 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1423 Symbol* name;
1424 if (is_primitive(java_class)) {
1425 name = vmSymbols::type_signature(primitive_type(java_class));
1426 // Because this can create a new symbol, the caller has to decrement
1427 // the refcount, so make adjustment here and below for symbols returned
1428 // that are not created or incremented due to a successful lookup.
1429 name->increment_refcount();
1430 } else {
1431 Klass* k = as_Klass(java_class);
1432 if (!k->is_instance_klass()) {
1433 name = k->name();
1434 name->increment_refcount();
1435 } else {
1436 ResourceMark rm;
1437 const char* sigstr = k->signature_name();
1438 int siglen = (int) strlen(sigstr);
1439 if (!intern_if_not_found) {
1440 name = SymbolTable::probe(sigstr, siglen);
1441 } else {
1442 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1443 }
1444 }
1445 }
1446 return name;
1447 }
1448
1449 // Returns the Java name for this Java mirror (Resource allocated)
1450 // See Klass::external_name().
1451 // For primitive type Java mirrors, its type name is returned.
as_external_name(oop java_class)1452 const char* java_lang_Class::as_external_name(oop java_class) {
1453 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1454 const char* name = NULL;
1455 if (is_primitive(java_class)) {
1456 name = type2name(primitive_type(java_class));
1457 } else {
1458 name = as_Klass(java_class)->external_name();
1459 }
1460 if (name == NULL) {
1461 name = "<null>";
1462 }
1463 return name;
1464 }
1465
array_klass_acquire(oop java_class)1466 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1467 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1468 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1469 return k;
1470 }
1471
1472
release_set_array_klass(oop java_class,Klass * klass)1473 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1474 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1475 java_class->release_metadata_field_put(_array_klass_offset, klass);
1476 }
1477
1478
is_primitive(oop java_class)1479 bool java_lang_Class::is_primitive(oop java_class) {
1480 // should assert:
1481 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1482 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1483
1484 #ifdef ASSERT
1485 if (is_primitive) {
1486 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1487 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1488 "Should be either the T_VOID primitive or a java primitive");
1489 }
1490 #endif
1491
1492 return is_primitive;
1493 }
1494
1495
primitive_type(oop java_class)1496 BasicType java_lang_Class::primitive_type(oop java_class) {
1497 assert(java_lang_Class::is_primitive(java_class), "just checking");
1498 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1499 BasicType type = T_VOID;
1500 if (ak != NULL) {
1501 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1502 type = ArrayKlass::cast(ak)->element_type();
1503 } else {
1504 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1505 }
1506 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1507 return type;
1508 }
1509
as_BasicType(oop java_class,Klass ** reference_klass)1510 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1511 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1512 if (is_primitive(java_class)) {
1513 if (reference_klass != NULL)
1514 (*reference_klass) = NULL;
1515 return primitive_type(java_class);
1516 } else {
1517 if (reference_klass != NULL)
1518 (*reference_klass) = as_Klass(java_class);
1519 return T_OBJECT;
1520 }
1521 }
1522
1523
primitive_mirror(BasicType t)1524 oop java_lang_Class::primitive_mirror(BasicType t) {
1525 oop mirror = Universe::java_mirror(t);
1526 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1527 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1528 return mirror;
1529 }
1530
1531 bool java_lang_Class::offsets_computed = false;
1532 int java_lang_Class::classRedefinedCount_offset = -1;
1533
1534 #define CLASS_FIELDS_DO(macro) \
1535 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1536 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1537 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1538 macro(_module_offset, k, "module", module_signature, false); \
1539 macro(_name_offset, k, "name", string_signature, false); \
1540
compute_offsets()1541 void java_lang_Class::compute_offsets() {
1542 if (offsets_computed) {
1543 return;
1544 }
1545
1546 offsets_computed = true;
1547
1548 InstanceKlass* k = SystemDictionary::Class_klass();
1549 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1550
1551 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1552 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1553 // GC treats them the same.
1554 _init_lock_offset = _component_mirror_offset;
1555
1556 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1557 }
1558
1559 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)1560 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1561 f->do_bool(&offsets_computed);
1562 f->do_u4((u4*)&_init_lock_offset);
1563
1564 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1565
1566 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1567 }
1568 #endif
1569
classRedefinedCount(oop the_class_mirror)1570 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1571 if (classRedefinedCount_offset == -1) {
1572 // If we don't have an offset for it then just return -1 as a marker.
1573 return -1;
1574 }
1575
1576 return the_class_mirror->int_field(classRedefinedCount_offset);
1577 }
1578
set_classRedefinedCount(oop the_class_mirror,int value)1579 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1580 if (classRedefinedCount_offset == -1) {
1581 // If we don't have an offset for it then nothing to set.
1582 return;
1583 }
1584
1585 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1586 }
1587
1588
1589 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1590 // platform thread structure, and a eetop offset which was used for thread
1591 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1592 // merged, so in the HotSpot VM we just use the eetop field for the thread
1593 // instead of the privateInfo_offset.
1594 //
1595 // Note: The stackSize field is only present starting in 1.4.
1596
1597 int java_lang_Thread::_name_offset = 0;
1598 int java_lang_Thread::_group_offset = 0;
1599 int java_lang_Thread::_contextClassLoader_offset = 0;
1600 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1601 int java_lang_Thread::_priority_offset = 0;
1602 int java_lang_Thread::_eetop_offset = 0;
1603 int java_lang_Thread::_daemon_offset = 0;
1604 int java_lang_Thread::_stillborn_offset = 0;
1605 int java_lang_Thread::_stackSize_offset = 0;
1606 int java_lang_Thread::_tid_offset = 0;
1607 int java_lang_Thread::_thread_status_offset = 0;
1608 int java_lang_Thread::_park_blocker_offset = 0;
1609
1610 #define THREAD_FIELDS_DO(macro) \
1611 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1612 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1613 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1614 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1615 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1616 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1617 macro(_eetop_offset, k, "eetop", long_signature, false); \
1618 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1619 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1620 macro(_tid_offset, k, "tid", long_signature, false); \
1621 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1622 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false)
1623
compute_offsets()1624 void java_lang_Thread::compute_offsets() {
1625 assert(_group_offset == 0, "offsets should be initialized only once");
1626
1627 InstanceKlass* k = SystemDictionary::Thread_klass();
1628 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1629 }
1630
1631 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)1632 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1633 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1634 }
1635 #endif
1636
thread(oop java_thread)1637 JavaThread* java_lang_Thread::thread(oop java_thread) {
1638 return (JavaThread*)java_thread->address_field(_eetop_offset);
1639 }
1640
1641
set_thread(oop java_thread,JavaThread * thread)1642 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1643 java_thread->address_field_put(_eetop_offset, (address)thread);
1644 }
1645
1646
name(oop java_thread)1647 oop java_lang_Thread::name(oop java_thread) {
1648 return java_thread->obj_field(_name_offset);
1649 }
1650
1651
set_name(oop java_thread,oop name)1652 void java_lang_Thread::set_name(oop java_thread, oop name) {
1653 java_thread->obj_field_put(_name_offset, name);
1654 }
1655
1656
priority(oop java_thread)1657 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1658 return (ThreadPriority)java_thread->int_field(_priority_offset);
1659 }
1660
1661
set_priority(oop java_thread,ThreadPriority priority)1662 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1663 java_thread->int_field_put(_priority_offset, priority);
1664 }
1665
1666
threadGroup(oop java_thread)1667 oop java_lang_Thread::threadGroup(oop java_thread) {
1668 return java_thread->obj_field(_group_offset);
1669 }
1670
1671
is_stillborn(oop java_thread)1672 bool java_lang_Thread::is_stillborn(oop java_thread) {
1673 return java_thread->bool_field(_stillborn_offset) != 0;
1674 }
1675
1676
1677 // We never have reason to turn the stillborn bit off
set_stillborn(oop java_thread)1678 void java_lang_Thread::set_stillborn(oop java_thread) {
1679 java_thread->bool_field_put(_stillborn_offset, true);
1680 }
1681
1682
is_alive(oop java_thread)1683 bool java_lang_Thread::is_alive(oop java_thread) {
1684 JavaThread* thr = java_lang_Thread::thread(java_thread);
1685 return (thr != NULL);
1686 }
1687
1688
is_daemon(oop java_thread)1689 bool java_lang_Thread::is_daemon(oop java_thread) {
1690 return java_thread->bool_field(_daemon_offset) != 0;
1691 }
1692
1693
set_daemon(oop java_thread)1694 void java_lang_Thread::set_daemon(oop java_thread) {
1695 java_thread->bool_field_put(_daemon_offset, true);
1696 }
1697
context_class_loader(oop java_thread)1698 oop java_lang_Thread::context_class_loader(oop java_thread) {
1699 return java_thread->obj_field(_contextClassLoader_offset);
1700 }
1701
inherited_access_control_context(oop java_thread)1702 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1703 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1704 }
1705
1706
stackSize(oop java_thread)1707 jlong java_lang_Thread::stackSize(oop java_thread) {
1708 if (_stackSize_offset > 0) {
1709 return java_thread->long_field(_stackSize_offset);
1710 } else {
1711 return 0;
1712 }
1713 }
1714
1715 // 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)1716 void java_lang_Thread::set_thread_status(oop java_thread,
1717 java_lang_Thread::ThreadStatus status) {
1718 // The threadStatus is only present starting in 1.5
1719 if (_thread_status_offset > 0) {
1720 java_thread->int_field_put(_thread_status_offset, status);
1721 }
1722 }
1723
1724 // Read thread status value from threadStatus field in java.lang.Thread java class.
get_thread_status(oop java_thread)1725 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1726 // Make sure the caller is operating on behalf of the VM or is
1727 // running VM code (state == _thread_in_vm).
1728 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1729 JavaThread::current()->thread_state() == _thread_in_vm,
1730 "Java Thread is not running in vm");
1731 // The threadStatus is only present starting in 1.5
1732 if (_thread_status_offset > 0) {
1733 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1734 } else {
1735 // All we can easily figure out is if it is alive, but that is
1736 // enough info for a valid unknown status.
1737 // These aren't restricted to valid set ThreadStatus values, so
1738 // use JVMTI values and cast.
1739 JavaThread* thr = java_lang_Thread::thread(java_thread);
1740 if (thr == NULL) {
1741 // the thread hasn't run yet or is in the process of exiting
1742 return NEW;
1743 }
1744 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1745 }
1746 }
1747
1748
thread_id(oop java_thread)1749 jlong java_lang_Thread::thread_id(oop java_thread) {
1750 // The thread ID field is only present starting in 1.5
1751 if (_tid_offset > 0) {
1752 return java_thread->long_field(_tid_offset);
1753 } else {
1754 return 0;
1755 }
1756 }
1757
park_blocker(oop java_thread)1758 oop java_lang_Thread::park_blocker(oop java_thread) {
1759 assert(JDK_Version::current().supports_thread_park_blocker() &&
1760 _park_blocker_offset != 0, "Must support parkBlocker field");
1761
1762 if (_park_blocker_offset > 0) {
1763 return java_thread->obj_field(_park_blocker_offset);
1764 }
1765
1766 return NULL;
1767 }
1768
thread_status_name(oop java_thread)1769 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1770 assert(_thread_status_offset != 0, "Must have thread status");
1771 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1772 switch (status) {
1773 case NEW : return "NEW";
1774 case RUNNABLE : return "RUNNABLE";
1775 case SLEEPING : return "TIMED_WAITING (sleeping)";
1776 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1777 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1778 case PARKED : return "WAITING (parking)";
1779 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1780 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1781 case TERMINATED : return "TERMINATED";
1782 default : return "UNKNOWN";
1783 };
1784 }
1785 int java_lang_ThreadGroup::_parent_offset = 0;
1786 int java_lang_ThreadGroup::_name_offset = 0;
1787 int java_lang_ThreadGroup::_threads_offset = 0;
1788 int java_lang_ThreadGroup::_groups_offset = 0;
1789 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1790 int java_lang_ThreadGroup::_destroyed_offset = 0;
1791 int java_lang_ThreadGroup::_daemon_offset = 0;
1792 int java_lang_ThreadGroup::_nthreads_offset = 0;
1793 int java_lang_ThreadGroup::_ngroups_offset = 0;
1794
parent(oop java_thread_group)1795 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1796 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1797 return java_thread_group->obj_field(_parent_offset);
1798 }
1799
1800 // ("name as oop" accessor is not necessary)
1801
name(oop java_thread_group)1802 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1803 oop name = java_thread_group->obj_field(_name_offset);
1804 // ThreadGroup.name can be null
1805 if (name != NULL) {
1806 return java_lang_String::as_utf8_string(name);
1807 }
1808 return NULL;
1809 }
1810
nthreads(oop java_thread_group)1811 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1812 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1813 return java_thread_group->int_field(_nthreads_offset);
1814 }
1815
threads(oop java_thread_group)1816 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1817 oop threads = java_thread_group->obj_field(_threads_offset);
1818 assert(threads != NULL, "threadgroups should have threads");
1819 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1820 return objArrayOop(threads);
1821 }
1822
ngroups(oop java_thread_group)1823 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1824 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1825 return java_thread_group->int_field(_ngroups_offset);
1826 }
1827
groups(oop java_thread_group)1828 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1829 oop groups = java_thread_group->obj_field(_groups_offset);
1830 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1831 return objArrayOop(groups);
1832 }
1833
maxPriority(oop java_thread_group)1834 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1835 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1836 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1837 }
1838
is_destroyed(oop java_thread_group)1839 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1840 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1841 return java_thread_group->bool_field(_destroyed_offset) != 0;
1842 }
1843
is_daemon(oop java_thread_group)1844 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1845 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1846 return java_thread_group->bool_field(_daemon_offset) != 0;
1847 }
1848
1849 #define THREADGROUP_FIELDS_DO(macro) \
1850 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1851 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1852 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1853 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1854 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1855 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1856 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1857 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1858 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1859
compute_offsets()1860 void java_lang_ThreadGroup::compute_offsets() {
1861 assert(_parent_offset == 0, "offsets should be initialized only once");
1862
1863 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1864 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1865 }
1866
1867 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)1868 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1869 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1870 }
1871 #endif
1872
1873 #define THROWABLE_FIELDS_DO(macro) \
1874 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1875 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1876 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1877 macro(depth_offset, k, "depth", int_signature, false); \
1878 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1879
compute_offsets()1880 void java_lang_Throwable::compute_offsets() {
1881 InstanceKlass* k = SystemDictionary::Throwable_klass();
1882 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1883 }
1884
1885 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)1886 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1887 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1888 }
1889 #endif
1890
unassigned_stacktrace()1891 oop java_lang_Throwable::unassigned_stacktrace() {
1892 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1893 oop base = ik->static_field_base_raw();
1894 return base->obj_field(static_unassigned_stacktrace_offset);
1895 }
1896
backtrace(oop throwable)1897 oop java_lang_Throwable::backtrace(oop throwable) {
1898 return throwable->obj_field_acquire(backtrace_offset);
1899 }
1900
1901
set_backtrace(oop throwable,oop value)1902 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1903 throwable->release_obj_field_put(backtrace_offset, value);
1904 }
1905
depth(oop throwable)1906 int java_lang_Throwable::depth(oop throwable) {
1907 return throwable->int_field(depth_offset);
1908 }
1909
set_depth(oop throwable,int value)1910 void java_lang_Throwable::set_depth(oop throwable, int value) {
1911 throwable->int_field_put(depth_offset, value);
1912 }
1913
message(oop throwable)1914 oop java_lang_Throwable::message(oop throwable) {
1915 return throwable->obj_field(detailMessage_offset);
1916 }
1917
1918
1919 // Return Symbol for detailed_message or NULL
detail_message(oop throwable)1920 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1921 PRESERVE_EXCEPTION_MARK; // Keep original exception
1922 oop detailed_message = java_lang_Throwable::message(throwable);
1923 if (detailed_message != NULL) {
1924 return java_lang_String::as_symbol(detailed_message, THREAD);
1925 }
1926 return NULL;
1927 }
1928
set_message(oop throwable,oop value)1929 void java_lang_Throwable::set_message(oop throwable, oop value) {
1930 throwable->obj_field_put(detailMessage_offset, value);
1931 }
1932
1933
set_stacktrace(oop throwable,oop st_element_array)1934 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1935 throwable->obj_field_put(stackTrace_offset, st_element_array);
1936 }
1937
clear_stacktrace(oop throwable)1938 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1939 set_stacktrace(throwable, NULL);
1940 }
1941
1942
print(oop throwable,outputStream * st)1943 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1944 ResourceMark rm;
1945 Klass* k = throwable->klass();
1946 assert(k != NULL, "just checking");
1947 st->print("%s", k->external_name());
1948 oop msg = message(throwable);
1949 if (msg != NULL) {
1950 st->print(": %s", java_lang_String::as_utf8_string(msg));
1951 }
1952 }
1953
1954 // After this many redefines, the stack trace is unreliable.
1955 const int MAX_VERSION = USHRT_MAX;
1956
version_matches(Method * method,int version)1957 static inline bool version_matches(Method* method, int version) {
1958 assert(version < MAX_VERSION, "version is too big");
1959 return method != NULL && (method->constants()->version() == version);
1960 }
1961
1962
1963 // This class provides a simple wrapper over the internal structure of
1964 // exception backtrace to insulate users of the backtrace from needing
1965 // to know what it looks like.
1966 class BacktraceBuilder: public StackObj {
1967 friend class BacktraceIterator;
1968 private:
1969 Handle _backtrace;
1970 objArrayOop _head;
1971 typeArrayOop _methods;
1972 typeArrayOop _bcis;
1973 objArrayOop _mirrors;
1974 typeArrayOop _names; // needed to insulate method name against redefinition
1975 int _index;
1976 NoSafepointVerifier _nsv;
1977
1978 enum {
1979 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1980 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1981 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1982 trace_names_offset = java_lang_Throwable::trace_names_offset,
1983 trace_next_offset = java_lang_Throwable::trace_next_offset,
1984 trace_size = java_lang_Throwable::trace_size,
1985 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1986 };
1987
1988 // get info out of chunks
get_methods(objArrayHandle chunk)1989 static typeArrayOop get_methods(objArrayHandle chunk) {
1990 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1991 assert(methods != NULL, "method array should be initialized in backtrace");
1992 return methods;
1993 }
get_bcis(objArrayHandle chunk)1994 static typeArrayOop get_bcis(objArrayHandle chunk) {
1995 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1996 assert(bcis != NULL, "bci array should be initialized in backtrace");
1997 return bcis;
1998 }
get_mirrors(objArrayHandle chunk)1999 static objArrayOop get_mirrors(objArrayHandle chunk) {
2000 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2001 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2002 return mirrors;
2003 }
get_names(objArrayHandle chunk)2004 static typeArrayOop get_names(objArrayHandle chunk) {
2005 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2006 assert(names != NULL, "names array should be initialized in backtrace");
2007 return names;
2008 }
2009
2010 public:
2011
2012 // constructor for new backtrace
BacktraceBuilder(TRAPS)2013 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) {
2014 expand(CHECK);
2015 _backtrace = Handle(THREAD, _head);
2016 _index = 0;
2017 }
2018
BacktraceBuilder(Thread * thread,objArrayHandle backtrace)2019 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2020 _methods = get_methods(backtrace);
2021 _bcis = get_bcis(backtrace);
2022 _mirrors = get_mirrors(backtrace);
2023 _names = get_names(backtrace);
2024 assert(_methods->length() == _bcis->length() &&
2025 _methods->length() == _mirrors->length() &&
2026 _mirrors->length() == _names->length(),
2027 "method and source information arrays should match");
2028
2029 // head is the preallocated backtrace
2030 _head = backtrace();
2031 _backtrace = Handle(thread, _head);
2032 _index = 0;
2033 }
2034
expand(TRAPS)2035 void expand(TRAPS) {
2036 objArrayHandle old_head(THREAD, _head);
2037 PauseNoSafepointVerifier pnsv(&_nsv);
2038
2039 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2040 objArrayHandle new_head(THREAD, head);
2041
2042 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2043 typeArrayHandle new_methods(THREAD, methods);
2044
2045 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2046 typeArrayHandle new_bcis(THREAD, bcis);
2047
2048 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2049 objArrayHandle new_mirrors(THREAD, mirrors);
2050
2051 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2052 typeArrayHandle new_names(THREAD, names);
2053
2054 if (!old_head.is_null()) {
2055 old_head->obj_at_put(trace_next_offset, new_head());
2056 }
2057 new_head->obj_at_put(trace_methods_offset, new_methods());
2058 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2059 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2060 new_head->obj_at_put(trace_names_offset, new_names());
2061
2062 _head = new_head();
2063 _methods = new_methods();
2064 _bcis = new_bcis();
2065 _mirrors = new_mirrors();
2066 _names = new_names();
2067 _index = 0;
2068 }
2069
backtrace()2070 oop backtrace() {
2071 return _backtrace();
2072 }
2073
push(Method * method,int bci,TRAPS)2074 inline void push(Method* method, int bci, TRAPS) {
2075 // Smear the -1 bci to 0 since the array only holds unsigned
2076 // shorts. The later line number lookup would just smear the -1
2077 // to a 0 even if it could be recorded.
2078 if (bci == SynchronizationEntryBCI) bci = 0;
2079
2080 if (_index >= trace_chunk_size) {
2081 methodHandle mhandle(THREAD, method);
2082 expand(CHECK);
2083 method = mhandle();
2084 }
2085
2086 _methods->ushort_at_put(_index, method->orig_method_idnum());
2087 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2088
2089 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2090 // klass owning the symbols alive so their refcounts aren't decremented.
2091 Symbol* name = method->name();
2092 _names->symbol_at_put(_index, name);
2093
2094 // We need to save the mirrors in the backtrace to keep the class
2095 // from being unloaded while we still have this stack trace.
2096 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2097 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2098 _index++;
2099 }
2100
2101 };
2102
2103 struct BacktraceElement : public StackObj {
2104 int _method_id;
2105 int _bci;
2106 int _version;
2107 Symbol* _name;
2108 Handle _mirror;
BacktraceElementBacktraceElement2109 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2110 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {}
2111 };
2112
2113 class BacktraceIterator : public StackObj {
2114 int _index;
2115 objArrayHandle _result;
2116 objArrayHandle _mirrors;
2117 typeArrayHandle _methods;
2118 typeArrayHandle _bcis;
2119 typeArrayHandle _names;
2120
init(objArrayHandle result,Thread * thread)2121 void init(objArrayHandle result, Thread* thread) {
2122 // Get method id, bci, version and mirror from chunk
2123 _result = result;
2124 if (_result.not_null()) {
2125 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2126 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2127 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2128 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2129 _index = 0;
2130 }
2131 }
2132 public:
BacktraceIterator(objArrayHandle result,Thread * thread)2133 BacktraceIterator(objArrayHandle result, Thread* thread) {
2134 init(result, thread);
2135 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2136 }
2137
next(Thread * thread)2138 BacktraceElement next(Thread* thread) {
2139 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2140 _methods->ushort_at(_index),
2141 Backtrace::version_at(_bcis->int_at(_index)),
2142 Backtrace::bci_at(_bcis->int_at(_index)),
2143 _names->symbol_at(_index));
2144 _index++;
2145
2146 if (_index >= java_lang_Throwable::trace_chunk_size) {
2147 int next_offset = java_lang_Throwable::trace_next_offset;
2148 // Get next chunk
2149 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2150 init(result, thread);
2151 }
2152 return e;
2153 }
2154
repeat()2155 bool repeat() {
2156 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2157 }
2158 };
2159
2160
2161 // 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)2162 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2163 int version, int bci, Symbol* name) {
2164 ResourceMark rm;
2165
2166 // Get strings and string lengths
2167 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2168 const char* klass_name = holder->external_name();
2169 int buf_len = (int)strlen(klass_name);
2170
2171 char* method_name = name->as_C_string();
2172 buf_len += (int)strlen(method_name);
2173
2174 char* source_file_name = NULL;
2175 Symbol* source = Backtrace::get_source_file_name(holder, version);
2176 if (source != NULL) {
2177 source_file_name = source->as_C_string();
2178 buf_len += (int)strlen(source_file_name);
2179 }
2180
2181 char *module_name = NULL, *module_version = NULL;
2182 ModuleEntry* module = holder->module();
2183 if (module->is_named()) {
2184 module_name = module->name()->as_C_string();
2185 buf_len += (int)strlen(module_name);
2186 if (module->version() != NULL) {
2187 module_version = module->version()->as_C_string();
2188 buf_len += (int)strlen(module_version);
2189 }
2190 }
2191
2192 // Allocate temporary buffer with extra space for formatting and line number
2193 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2194
2195 // Print stack trace line in buffer
2196 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2197
2198 // Print module information
2199 if (module_name != NULL) {
2200 if (module_version != NULL) {
2201 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2202 } else {
2203 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2204 }
2205 }
2206
2207 // The method can be NULL if the requested class version is gone
2208 Method* method = holder->method_with_orig_idnum(method_id, version);
2209 if (!version_matches(method, version)) {
2210 strcat(buf, "Redefined)");
2211 } else {
2212 int line_number = Backtrace::get_line_number(method, bci);
2213 if (line_number == -2) {
2214 strcat(buf, "Native Method)");
2215 } else {
2216 if (source_file_name != NULL && (line_number != -1)) {
2217 // Sourcename and linenumber
2218 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2219 } else if (source_file_name != NULL) {
2220 // Just sourcename
2221 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2222 } else {
2223 // Neither sourcename nor linenumber
2224 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2225 }
2226 CompiledMethod* nm = method->code();
2227 if (WizardMode && nm != NULL) {
2228 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2229 }
2230 }
2231 }
2232
2233 st->print_cr("%s", buf);
2234 }
2235
print_stack_element(outputStream * st,const methodHandle & method,int bci)2236 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2237 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2238 int method_id = method->orig_method_idnum();
2239 int version = method->constants()->version();
2240 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2241 }
2242
2243 /**
2244 * Print the throwable message and its stack trace plus all causes by walking the
2245 * cause chain. The output looks the same as of Throwable.printStackTrace().
2246 */
print_stack_trace(Handle throwable,outputStream * st)2247 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2248 // First, print the message.
2249 print(throwable(), st);
2250 st->cr();
2251
2252 // Now print the stack trace.
2253 Thread* THREAD = Thread::current();
2254 while (throwable.not_null()) {
2255 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2256 if (result.is_null()) {
2257 st->print_raw_cr("\t<<no stack trace available>>");
2258 return;
2259 }
2260 BacktraceIterator iter(result, THREAD);
2261
2262 while (iter.repeat()) {
2263 BacktraceElement bte = iter.next(THREAD);
2264 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2265 }
2266 {
2267 // Call getCause() which doesn't necessarily return the _cause field.
2268 EXCEPTION_MARK;
2269 JavaValue cause(T_OBJECT);
2270 JavaCalls::call_virtual(&cause,
2271 throwable,
2272 throwable->klass(),
2273 vmSymbols::getCause_name(),
2274 vmSymbols::void_throwable_signature(),
2275 THREAD);
2276 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2277 if (HAS_PENDING_EXCEPTION) {
2278 CLEAR_PENDING_EXCEPTION;
2279 throwable = Handle();
2280 } else {
2281 throwable = Handle(THREAD, (oop) cause.get_jobject());
2282 if (throwable.not_null()) {
2283 st->print("Caused by: ");
2284 print(throwable(), st);
2285 st->cr();
2286 }
2287 }
2288 }
2289 }
2290 }
2291
2292 /**
2293 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2294 */
java_printStackTrace(Handle throwable,TRAPS)2295 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2296 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2297 JavaValue result(T_VOID);
2298 JavaCalls::call_virtual(&result,
2299 throwable,
2300 SystemDictionary::Throwable_klass(),
2301 vmSymbols::printStackTrace_name(),
2302 vmSymbols::void_method_signature(),
2303 THREAD);
2304 }
2305
fill_in_stack_trace(Handle throwable,const methodHandle & method,TRAPS)2306 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2307 if (!StackTraceInThrowable) return;
2308 ResourceMark rm(THREAD);
2309
2310 // Start out by clearing the backtrace for this object, in case the VM
2311 // runs out of memory while allocating the stack trace
2312 set_backtrace(throwable(), NULL);
2313 // Clear lazily constructed Java level stacktrace if refilling occurs
2314 // This is unnecessary in 1.7+ but harmless
2315 clear_stacktrace(throwable());
2316
2317 int max_depth = MaxJavaStackTraceDepth;
2318 JavaThread* thread = (JavaThread*)THREAD;
2319
2320 BacktraceBuilder bt(CHECK);
2321
2322 // If there is no Java frame just return the method that was being called
2323 // with bci 0
2324 if (!thread->has_last_Java_frame()) {
2325 if (max_depth >= 1 && method() != NULL) {
2326 bt.push(method(), 0, CHECK);
2327 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2328 set_depth(throwable(), 1);
2329 set_backtrace(throwable(), bt.backtrace());
2330 }
2331 return;
2332 }
2333
2334 // Instead of using vframe directly, this version of fill_in_stack_trace
2335 // basically handles everything by hand. This significantly improved the
2336 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2337 // See bug 6333838 for more details.
2338 // The "ASSERT" here is to verify this method generates the exactly same stack
2339 // trace as utilizing vframe.
2340 #ifdef ASSERT
2341 vframeStream st(thread);
2342 methodHandle st_method(THREAD, st.method());
2343 #endif
2344 int total_count = 0;
2345 RegisterMap map(thread, false);
2346 int decode_offset = 0;
2347 CompiledMethod* nm = NULL;
2348 bool skip_fillInStackTrace_check = false;
2349 bool skip_throwableInit_check = false;
2350 bool skip_hidden = !ShowHiddenFrames;
2351
2352 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2353 Method* method = NULL;
2354 int bci = 0;
2355
2356 // Compiled java method case.
2357 if (decode_offset != 0) {
2358 DebugInfoReadStream stream(nm, decode_offset);
2359 decode_offset = stream.read_int();
2360 method = (Method*)nm->metadata_at(stream.read_int());
2361 bci = stream.read_bci();
2362 } else {
2363 if (fr.is_first_frame()) break;
2364 address pc = fr.pc();
2365 if (fr.is_interpreted_frame()) {
2366 address bcp = fr.interpreter_frame_bcp();
2367 method = fr.interpreter_frame_method();
2368 bci = method->bci_from(bcp);
2369 fr = fr.sender(&map);
2370 } else {
2371 CodeBlob* cb = fr.cb();
2372 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2373 // but non nmethod
2374 fr = fr.sender(&map);
2375 if (cb == NULL || !cb->is_compiled()) {
2376 continue;
2377 }
2378 nm = cb->as_compiled_method();
2379 if (nm->method()->is_native()) {
2380 method = nm->method();
2381 bci = 0;
2382 } else {
2383 PcDesc* pd = nm->pc_desc_at(pc);
2384 decode_offset = pd->scope_decode_offset();
2385 // if decode_offset is not equal to 0, it will execute the
2386 // "compiled java method case" at the beginning of the loop.
2387 continue;
2388 }
2389 }
2390 }
2391 #ifdef ASSERT
2392 assert(st_method() == method && st.bci() == bci,
2393 "Wrong stack trace");
2394 st.next();
2395 // vframeStream::method isn't GC-safe so store off a copy
2396 // of the Method* in case we GC.
2397 if (!st.at_end()) {
2398 st_method = st.method();
2399 }
2400 #endif
2401
2402 // the format of the stacktrace will be:
2403 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2404 // - 0 or more <init> methods for the exception class (skipped)
2405 // - rest of the stack
2406
2407 if (!skip_fillInStackTrace_check) {
2408 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2409 throwable->is_a(method->method_holder())) {
2410 continue;
2411 }
2412 else {
2413 skip_fillInStackTrace_check = true; // gone past them all
2414 }
2415 }
2416 if (!skip_throwableInit_check) {
2417 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2418
2419 // skip <init> methods of the exception class and superclasses
2420 // This is simlar to classic VM.
2421 if (method->name() == vmSymbols::object_initializer_name() &&
2422 throwable->is_a(method->method_holder())) {
2423 continue;
2424 } else {
2425 // there are none or we've seen them all - either way stop checking
2426 skip_throwableInit_check = true;
2427 }
2428 }
2429 if (method->is_hidden()) {
2430 if (skip_hidden) continue;
2431 }
2432 bt.push(method, bci, CHECK);
2433 total_count++;
2434 }
2435
2436 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2437
2438 // Put completed stack trace into throwable object
2439 set_backtrace(throwable(), bt.backtrace());
2440 set_depth(throwable(), total_count);
2441 }
2442
fill_in_stack_trace(Handle throwable,const methodHandle & method)2443 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2444 // No-op if stack trace is disabled
2445 if (!StackTraceInThrowable) {
2446 return;
2447 }
2448
2449 // Disable stack traces for some preallocated out of memory errors
2450 if (!Universe::should_fill_in_stack_trace(throwable)) {
2451 return;
2452 }
2453
2454 PRESERVE_EXCEPTION_MARK;
2455
2456 JavaThread* thread = JavaThread::active();
2457 fill_in_stack_trace(throwable, method, thread);
2458 // ignore exceptions thrown during stack trace filling
2459 CLEAR_PENDING_EXCEPTION;
2460 }
2461
allocate_backtrace(Handle throwable,TRAPS)2462 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2463 // Allocate stack trace - backtrace is created but not filled in
2464
2465 // No-op if stack trace is disabled
2466 if (!StackTraceInThrowable) return;
2467 BacktraceBuilder bt(CHECK); // creates a backtrace
2468 set_backtrace(throwable(), bt.backtrace());
2469 }
2470
2471
fill_in_stack_trace_of_preallocated_backtrace(Handle throwable)2472 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2473 // Fill in stack trace into preallocated backtrace (no GC)
2474
2475 // No-op if stack trace is disabled
2476 if (!StackTraceInThrowable) return;
2477
2478 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2479
2480 JavaThread* THREAD = JavaThread::current();
2481
2482 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2483 assert(backtrace.not_null(), "backtrace should have been preallocated");
2484
2485 ResourceMark rm(THREAD);
2486 vframeStream st(THREAD);
2487
2488 BacktraceBuilder bt(THREAD, backtrace);
2489
2490 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2491 // methods as preallocated errors aren't created by "java" code.
2492
2493 // fill in as much stack trace as possible
2494 int chunk_count = 0;
2495 for (;!st.at_end(); st.next()) {
2496 bt.push(st.method(), st.bci(), CHECK);
2497 chunk_count++;
2498
2499 // Bail-out for deep stacks
2500 if (chunk_count >= trace_chunk_size) break;
2501 }
2502 set_depth(throwable(), chunk_count);
2503 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2504
2505 // We support the Throwable immutability protocol defined for Java 7.
2506 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2507 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2508 }
2509
get_stack_trace_elements(Handle throwable,objArrayHandle stack_trace_array_h,TRAPS)2510 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2511 objArrayHandle stack_trace_array_h, TRAPS) {
2512
2513 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2514 THROW(vmSymbols::java_lang_NullPointerException());
2515 }
2516
2517 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2518
2519 if (stack_trace_array_h->length() != depth(throwable())) {
2520 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2521 }
2522
2523 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2524 BacktraceIterator iter(result, THREAD);
2525
2526 int index = 0;
2527 while (iter.repeat()) {
2528 BacktraceElement bte = iter.next(THREAD);
2529
2530 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2531
2532 if (stack_trace_element.is_null()) {
2533 THROW(vmSymbols::java_lang_NullPointerException());
2534 }
2535
2536 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2537 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2538
2539 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2540 method,
2541 bte._version,
2542 bte._bci,
2543 bte._name, CHECK);
2544 }
2545 }
2546
create(const methodHandle & method,int bci,TRAPS)2547 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2548 // Allocate java.lang.StackTraceElement instance
2549 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2550 assert(k != NULL, "must be loaded in 1.4+");
2551 if (k->should_be_initialized()) {
2552 k->initialize(CHECK_0);
2553 }
2554
2555 Handle element = k->allocate_instance_handle(CHECK_0);
2556
2557 int version = method->constants()->version();
2558 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2559 return element();
2560 }
2561
fill_in(Handle element,InstanceKlass * holder,const methodHandle & method,int version,int bci,Symbol * name,TRAPS)2562 void java_lang_StackTraceElement::fill_in(Handle element,
2563 InstanceKlass* holder, const methodHandle& method,
2564 int version, int bci, Symbol* name, TRAPS) {
2565 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2566
2567 ResourceMark rm(THREAD);
2568 HandleMark hm(THREAD);
2569
2570 // Fill in class name
2571 Handle java_class(THREAD, holder->java_mirror());
2572 oop classname = java_lang_Class::name(java_class, CHECK);
2573 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2574 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2575
2576 oop loader = holder->class_loader();
2577 if (loader != NULL) {
2578 oop loader_name = java_lang_ClassLoader::name(loader);
2579 if (loader_name != NULL)
2580 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2581 }
2582
2583 // Fill in method name
2584 oop methodname = StringTable::intern(name, CHECK);
2585 java_lang_StackTraceElement::set_methodName(element(), methodname);
2586
2587 // Fill in module name and version
2588 ModuleEntry* module = holder->module();
2589 if (module->is_named()) {
2590 oop module_name = StringTable::intern(module->name(), CHECK);
2591 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2592 oop module_version;
2593 if (module->version() != NULL) {
2594 module_version = StringTable::intern(module->version(), CHECK);
2595 } else {
2596 module_version = NULL;
2597 }
2598 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2599 }
2600
2601 if (method() == NULL || !version_matches(method(), version)) {
2602 // The method was redefined, accurate line number information isn't available
2603 java_lang_StackTraceElement::set_fileName(element(), NULL);
2604 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2605 } else {
2606 // Fill in source file name and line number.
2607 Symbol* source = Backtrace::get_source_file_name(holder, version);
2608 oop source_file = java_lang_Class::source_file(java_class());
2609 if (source != NULL) {
2610 // Class was not redefined. We can trust its cache if set,
2611 // else we have to initialize it.
2612 if (source_file == NULL) {
2613 source_file = StringTable::intern(source, CHECK);
2614 java_lang_Class::set_source_file(java_class(), source_file);
2615 }
2616 } else {
2617 // Class was redefined. Dump the cache if it was set.
2618 if (source_file != NULL) {
2619 source_file = NULL;
2620 java_lang_Class::set_source_file(java_class(), source_file);
2621 }
2622 }
2623 java_lang_StackTraceElement::set_fileName(element(), source_file);
2624
2625 int line_number = Backtrace::get_line_number(method, bci);
2626 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2627 }
2628 }
2629
get_method(Handle stackFrame,InstanceKlass * holder,TRAPS)2630 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2631 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2632 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2633 // we should expand MemberName::name when Throwable uses StackTrace
2634 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2635 return method;
2636 }
2637
set_method_and_bci(Handle stackFrame,const methodHandle & method,int bci,TRAPS)2638 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2639 // set Method* or mid/cpref
2640 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2641 InstanceKlass* ik = method->method_holder();
2642 CallInfo info(method(), ik, CHECK);
2643 MethodHandles::init_method_MemberName(mname, info);
2644 // set bci
2645 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2646 // method may be redefined; store the version
2647 int version = method->constants()->version();
2648 assert((jushort)version == version, "version should be short");
2649 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2650 }
2651
to_stack_trace_element(Handle stackFrame,Handle stack_trace_element,TRAPS)2652 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2653 ResourceMark rm(THREAD);
2654 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2655 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2656 InstanceKlass* holder = InstanceKlass::cast(clazz);
2657 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2658
2659 short version = stackFrame->short_field(_version_offset);
2660 int bci = stackFrame->int_field(_bci_offset);
2661 Symbol* name = method->name();
2662 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2663 }
2664
2665 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2666 macro(_memberName_offset, k, "memberName", object_signature, false); \
2667 macro(_bci_offset, k, "bci", int_signature, false)
2668
compute_offsets()2669 void java_lang_StackFrameInfo::compute_offsets() {
2670 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2671 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2672 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2673 }
2674
2675 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)2676 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2677 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2678 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2679 }
2680 #endif
2681
2682 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2683 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2684 macro(_locals_offset, k, "locals", object_array_signature, false); \
2685 macro(_operands_offset, k, "operands", object_array_signature, false); \
2686 macro(_mode_offset, k, "mode", int_signature, false)
2687
compute_offsets()2688 void java_lang_LiveStackFrameInfo::compute_offsets() {
2689 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2690 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2691 }
2692
2693 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)2694 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2695 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2696 }
2697 #endif
2698
2699 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2700 macro(override_offset, k, "override", bool_signature, false)
2701
compute_offsets()2702 void java_lang_reflect_AccessibleObject::compute_offsets() {
2703 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2704 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2705 }
2706
2707 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)2708 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2709 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2710 }
2711 #endif
2712
override(oop reflect)2713 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2714 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2715 return (jboolean) reflect->bool_field(override_offset);
2716 }
2717
set_override(oop reflect,jboolean value)2718 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2719 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2720 reflect->bool_field_put(override_offset, (int) value);
2721 }
2722
2723 #define METHOD_FIELDS_DO(macro) \
2724 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2725 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2726 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2727 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2728 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2729 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2730 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2731 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \
2732 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \
2733 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \
2734 macro##_OPTIONAL(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature); \
2735 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature)
2736
compute_offsets()2737 void java_lang_reflect_Method::compute_offsets() {
2738 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2739 // The generic signature and annotations fields are only present in 1.5
2740 signature_offset = -1;
2741 annotations_offset = -1;
2742 parameter_annotations_offset = -1;
2743 annotation_default_offset = -1;
2744 type_annotations_offset = -1;
2745 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2746 }
2747
2748 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)2749 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2750 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2751 }
2752 #endif
2753
create(TRAPS)2754 Handle java_lang_reflect_Method::create(TRAPS) {
2755 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2756 Klass* klass = SystemDictionary::reflect_Method_klass();
2757 // This class is eagerly initialized during VM initialization, since we keep a refence
2758 // to one of the methods
2759 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2760 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2761 }
2762
clazz(oop reflect)2763 oop java_lang_reflect_Method::clazz(oop reflect) {
2764 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2765 return reflect->obj_field(clazz_offset);
2766 }
2767
set_clazz(oop reflect,oop value)2768 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2769 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2770 reflect->obj_field_put(clazz_offset, value);
2771 }
2772
slot(oop reflect)2773 int java_lang_reflect_Method::slot(oop reflect) {
2774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2775 return reflect->int_field(slot_offset);
2776 }
2777
set_slot(oop reflect,int value)2778 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2779 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2780 reflect->int_field_put(slot_offset, value);
2781 }
2782
name(oop method)2783 oop java_lang_reflect_Method::name(oop method) {
2784 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2785 return method->obj_field(name_offset);
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
exception_types(oop method)2813 oop java_lang_reflect_Method::exception_types(oop method) {
2814 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2815 return method->obj_field(exceptionTypes_offset);
2816 }
2817
set_exception_types(oop method,oop value)2818 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2819 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2820 method->obj_field_put(exceptionTypes_offset, value);
2821 }
2822
modifiers(oop method)2823 int java_lang_reflect_Method::modifiers(oop method) {
2824 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2825 return method->int_field(modifiers_offset);
2826 }
2827
set_modifiers(oop method,int value)2828 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2829 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2830 method->int_field_put(modifiers_offset, value);
2831 }
2832
has_signature_field()2833 bool java_lang_reflect_Method::has_signature_field() {
2834 return (signature_offset >= 0);
2835 }
2836
signature(oop method)2837 oop java_lang_reflect_Method::signature(oop method) {
2838 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2839 assert(has_signature_field(), "signature field must be present");
2840 return method->obj_field(signature_offset);
2841 }
2842
set_signature(oop method,oop value)2843 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2844 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2845 assert(has_signature_field(), "signature field must be present");
2846 method->obj_field_put(signature_offset, value);
2847 }
2848
has_annotations_field()2849 bool java_lang_reflect_Method::has_annotations_field() {
2850 return (annotations_offset >= 0);
2851 }
2852
annotations(oop method)2853 oop java_lang_reflect_Method::annotations(oop method) {
2854 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2855 assert(has_annotations_field(), "annotations field must be present");
2856 return method->obj_field(annotations_offset);
2857 }
2858
set_annotations(oop method,oop value)2859 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2860 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2861 assert(has_annotations_field(), "annotations field must be present");
2862 method->obj_field_put(annotations_offset, value);
2863 }
2864
has_parameter_annotations_field()2865 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2866 return (parameter_annotations_offset >= 0);
2867 }
2868
parameter_annotations(oop method)2869 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2870 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2871 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2872 return method->obj_field(parameter_annotations_offset);
2873 }
2874
set_parameter_annotations(oop method,oop value)2875 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2876 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2877 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2878 method->obj_field_put(parameter_annotations_offset, value);
2879 }
2880
has_annotation_default_field()2881 bool java_lang_reflect_Method::has_annotation_default_field() {
2882 return (annotation_default_offset >= 0);
2883 }
2884
annotation_default(oop method)2885 oop java_lang_reflect_Method::annotation_default(oop method) {
2886 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2887 assert(has_annotation_default_field(), "annotation default field must be present");
2888 return method->obj_field(annotation_default_offset);
2889 }
2890
set_annotation_default(oop method,oop value)2891 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2892 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2893 assert(has_annotation_default_field(), "annotation default field must be present");
2894 method->obj_field_put(annotation_default_offset, value);
2895 }
2896
has_type_annotations_field()2897 bool java_lang_reflect_Method::has_type_annotations_field() {
2898 return (type_annotations_offset >= 0);
2899 }
2900
type_annotations(oop method)2901 oop java_lang_reflect_Method::type_annotations(oop method) {
2902 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2903 assert(has_type_annotations_field(), "type_annotations field must be present");
2904 return method->obj_field(type_annotations_offset);
2905 }
2906
set_type_annotations(oop method,oop value)2907 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2908 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2909 assert(has_type_annotations_field(), "type_annotations field must be present");
2910 method->obj_field_put(type_annotations_offset, value);
2911 }
2912
2913 #define CONSTRUCTOR_FIELDS_DO(macro) \
2914 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2915 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2916 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2917 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2918 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2919 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \
2920 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \
2921 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \
2922 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature)
2923
2924
compute_offsets()2925 void java_lang_reflect_Constructor::compute_offsets() {
2926 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2927 // The generic signature and annotations fields are only present in 1.5
2928 signature_offset = -1;
2929 annotations_offset = -1;
2930 parameter_annotations_offset = -1;
2931 type_annotations_offset = -1;
2932 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2933 }
2934
2935 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)2936 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2937 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2938 }
2939 #endif
2940
create(TRAPS)2941 Handle java_lang_reflect_Constructor::create(TRAPS) {
2942 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2943 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2944 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2945 InstanceKlass* ik = InstanceKlass::cast(k);
2946 // Ensure it is initialized
2947 ik->initialize(CHECK_NH);
2948 return ik->allocate_instance_handle(THREAD);
2949 }
2950
clazz(oop reflect)2951 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2952 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2953 return reflect->obj_field(clazz_offset);
2954 }
2955
set_clazz(oop reflect,oop value)2956 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2957 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2958 reflect->obj_field_put(clazz_offset, value);
2959 }
2960
parameter_types(oop constructor)2961 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2962 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2963 return constructor->obj_field(parameterTypes_offset);
2964 }
2965
set_parameter_types(oop constructor,oop value)2966 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2967 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2968 constructor->obj_field_put(parameterTypes_offset, value);
2969 }
2970
exception_types(oop constructor)2971 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2972 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2973 return constructor->obj_field(exceptionTypes_offset);
2974 }
2975
set_exception_types(oop constructor,oop value)2976 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2977 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2978 constructor->obj_field_put(exceptionTypes_offset, value);
2979 }
2980
slot(oop reflect)2981 int java_lang_reflect_Constructor::slot(oop reflect) {
2982 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2983 return reflect->int_field(slot_offset);
2984 }
2985
set_slot(oop reflect,int value)2986 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2988 reflect->int_field_put(slot_offset, value);
2989 }
2990
modifiers(oop constructor)2991 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2993 return constructor->int_field(modifiers_offset);
2994 }
2995
set_modifiers(oop constructor,int value)2996 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2998 constructor->int_field_put(modifiers_offset, value);
2999 }
3000
has_signature_field()3001 bool java_lang_reflect_Constructor::has_signature_field() {
3002 return (signature_offset >= 0);
3003 }
3004
signature(oop constructor)3005 oop java_lang_reflect_Constructor::signature(oop constructor) {
3006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3007 assert(has_signature_field(), "signature field must be present");
3008 return constructor->obj_field(signature_offset);
3009 }
3010
set_signature(oop constructor,oop value)3011 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3013 assert(has_signature_field(), "signature field must be present");
3014 constructor->obj_field_put(signature_offset, value);
3015 }
3016
has_annotations_field()3017 bool java_lang_reflect_Constructor::has_annotations_field() {
3018 return (annotations_offset >= 0);
3019 }
3020
annotations(oop constructor)3021 oop java_lang_reflect_Constructor::annotations(oop constructor) {
3022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3023 assert(has_annotations_field(), "annotations field must be present");
3024 return constructor->obj_field(annotations_offset);
3025 }
3026
set_annotations(oop constructor,oop value)3027 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3028 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3029 assert(has_annotations_field(), "annotations field must be present");
3030 constructor->obj_field_put(annotations_offset, value);
3031 }
3032
has_parameter_annotations_field()3033 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
3034 return (parameter_annotations_offset >= 0);
3035 }
3036
parameter_annotations(oop method)3037 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
3038 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3039 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
3040 return method->obj_field(parameter_annotations_offset);
3041 }
3042
set_parameter_annotations(oop method,oop value)3043 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3044 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3045 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
3046 method->obj_field_put(parameter_annotations_offset, value);
3047 }
3048
has_type_annotations_field()3049 bool java_lang_reflect_Constructor::has_type_annotations_field() {
3050 return (type_annotations_offset >= 0);
3051 }
3052
type_annotations(oop constructor)3053 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
3054 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3055 assert(has_type_annotations_field(), "type_annotations field must be present");
3056 return constructor->obj_field(type_annotations_offset);
3057 }
3058
set_type_annotations(oop constructor,oop value)3059 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
3060 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3061 assert(has_type_annotations_field(), "type_annotations field must be present");
3062 constructor->obj_field_put(type_annotations_offset, value);
3063 }
3064
3065 #define FIELD_FIELDS_DO(macro) \
3066 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3067 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3068 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3069 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3070 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3071 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \
3072 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \
3073 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature)
3074
compute_offsets()3075 void java_lang_reflect_Field::compute_offsets() {
3076 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3077 // The generic signature and annotations fields are only present in 1.5
3078 signature_offset = -1;
3079 annotations_offset = -1;
3080 type_annotations_offset = -1;
3081 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3082 }
3083
3084 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3085 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3086 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3087 }
3088 #endif
3089
create(TRAPS)3090 Handle java_lang_reflect_Field::create(TRAPS) {
3091 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3092 Symbol* name = vmSymbols::java_lang_reflect_Field();
3093 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3094 InstanceKlass* ik = InstanceKlass::cast(k);
3095 // Ensure it is initialized
3096 ik->initialize(CHECK_NH);
3097 return ik->allocate_instance_handle(THREAD);
3098 }
3099
clazz(oop reflect)3100 oop java_lang_reflect_Field::clazz(oop reflect) {
3101 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3102 return reflect->obj_field(clazz_offset);
3103 }
3104
set_clazz(oop reflect,oop value)3105 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3106 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3107 reflect->obj_field_put(clazz_offset, value);
3108 }
3109
name(oop field)3110 oop java_lang_reflect_Field::name(oop field) {
3111 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3112 return field->obj_field(name_offset);
3113 }
3114
set_name(oop field,oop value)3115 void java_lang_reflect_Field::set_name(oop field, oop value) {
3116 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3117 field->obj_field_put(name_offset, value);
3118 }
3119
type(oop field)3120 oop java_lang_reflect_Field::type(oop field) {
3121 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3122 return field->obj_field(type_offset);
3123 }
3124
set_type(oop field,oop value)3125 void java_lang_reflect_Field::set_type(oop field, oop value) {
3126 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3127 field->obj_field_put(type_offset, value);
3128 }
3129
slot(oop reflect)3130 int java_lang_reflect_Field::slot(oop reflect) {
3131 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3132 return reflect->int_field(slot_offset);
3133 }
3134
set_slot(oop reflect,int value)3135 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3136 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3137 reflect->int_field_put(slot_offset, value);
3138 }
3139
modifiers(oop field)3140 int java_lang_reflect_Field::modifiers(oop field) {
3141 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3142 return field->int_field(modifiers_offset);
3143 }
3144
set_modifiers(oop field,int value)3145 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3146 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3147 field->int_field_put(modifiers_offset, value);
3148 }
3149
has_signature_field()3150 bool java_lang_reflect_Field::has_signature_field() {
3151 return (signature_offset >= 0);
3152 }
3153
signature(oop field)3154 oop java_lang_reflect_Field::signature(oop field) {
3155 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3156 assert(has_signature_field(), "signature field must be present");
3157 return field->obj_field(signature_offset);
3158 }
3159
set_signature(oop field,oop value)3160 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3162 assert(has_signature_field(), "signature field must be present");
3163 field->obj_field_put(signature_offset, value);
3164 }
3165
has_annotations_field()3166 bool java_lang_reflect_Field::has_annotations_field() {
3167 return (annotations_offset >= 0);
3168 }
3169
annotations(oop field)3170 oop java_lang_reflect_Field::annotations(oop field) {
3171 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3172 assert(has_annotations_field(), "annotations field must be present");
3173 return field->obj_field(annotations_offset);
3174 }
3175
set_annotations(oop field,oop value)3176 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3177 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3178 assert(has_annotations_field(), "annotations field must be present");
3179 field->obj_field_put(annotations_offset, value);
3180 }
3181
has_type_annotations_field()3182 bool java_lang_reflect_Field::has_type_annotations_field() {
3183 return (type_annotations_offset >= 0);
3184 }
3185
type_annotations(oop field)3186 oop java_lang_reflect_Field::type_annotations(oop field) {
3187 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3188 assert(has_type_annotations_field(), "type_annotations field must be present");
3189 return field->obj_field(type_annotations_offset);
3190 }
3191
set_type_annotations(oop field,oop value)3192 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
3193 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3194 assert(has_type_annotations_field(), "type_annotations field must be present");
3195 field->obj_field_put(type_annotations_offset, value);
3196 }
3197
3198 #define CONSTANTPOOL_FIELDS_DO(macro) \
3199 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3200
compute_offsets()3201 void reflect_ConstantPool::compute_offsets() {
3202 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3203 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3204 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3205 }
3206
3207 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3208 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3209 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3210 }
3211 #endif
3212
3213 #define PARAMETER_FIELDS_DO(macro) \
3214 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3215 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3216 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3217 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3218
compute_offsets()3219 void java_lang_reflect_Parameter::compute_offsets() {
3220 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3221 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3222 }
3223
3224 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3225 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3226 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3227 }
3228 #endif
3229
create(TRAPS)3230 Handle java_lang_reflect_Parameter::create(TRAPS) {
3231 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3232 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3233 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3234 InstanceKlass* ik = InstanceKlass::cast(k);
3235 // Ensure it is initialized
3236 ik->initialize(CHECK_NH);
3237 return ik->allocate_instance_handle(THREAD);
3238 }
3239
name(oop param)3240 oop java_lang_reflect_Parameter::name(oop param) {
3241 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3242 return param->obj_field(name_offset);
3243 }
3244
set_name(oop param,oop value)3245 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3246 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3247 param->obj_field_put(name_offset, value);
3248 }
3249
modifiers(oop param)3250 int java_lang_reflect_Parameter::modifiers(oop param) {
3251 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3252 return param->int_field(modifiers_offset);
3253 }
3254
set_modifiers(oop param,int value)3255 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3256 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3257 param->int_field_put(modifiers_offset, value);
3258 }
3259
index(oop param)3260 int java_lang_reflect_Parameter::index(oop param) {
3261 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3262 return param->int_field(index_offset);
3263 }
3264
set_index(oop param,int value)3265 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3266 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3267 param->int_field_put(index_offset, value);
3268 }
3269
executable(oop param)3270 oop java_lang_reflect_Parameter::executable(oop param) {
3271 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3272 return param->obj_field(executable_offset);
3273 }
3274
set_executable(oop param,oop value)3275 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3276 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3277 param->obj_field_put(executable_offset, value);
3278 }
3279
3280
3281 int java_lang_Module::loader_offset;
3282 int java_lang_Module::name_offset;
3283 int java_lang_Module::_module_entry_offset = -1;
3284
create(Handle loader,Handle module_name,TRAPS)3285 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3286 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3287 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3288 vmSymbols::java_lang_module_init_signature(),
3289 loader, module_name, CHECK_NH);
3290 }
3291
3292 #define MODULE_FIELDS_DO(macro) \
3293 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3294 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3295
compute_offsets()3296 void java_lang_Module::compute_offsets() {
3297 InstanceKlass* k = SystemDictionary::Module_klass();
3298 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3299 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3300 }
3301
3302 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3303 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3304 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3305 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3306 }
3307 #endif
3308
loader(oop module)3309 oop java_lang_Module::loader(oop module) {
3310 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3311 return module->obj_field(loader_offset);
3312 }
3313
set_loader(oop module,oop value)3314 void java_lang_Module::set_loader(oop module, oop value) {
3315 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3316 module->obj_field_put(loader_offset, value);
3317 }
3318
name(oop module)3319 oop java_lang_Module::name(oop module) {
3320 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3321 return module->obj_field(name_offset);
3322 }
3323
set_name(oop module,oop value)3324 void java_lang_Module::set_name(oop module, oop value) {
3325 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3326 module->obj_field_put(name_offset, value);
3327 }
3328
module_entry(oop module)3329 ModuleEntry* java_lang_Module::module_entry(oop module) {
3330 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3331 assert(module != NULL, "module can't be null");
3332 assert(oopDesc::is_oop(module), "module must be oop");
3333
3334 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3335 if (module_entry == NULL) {
3336 // If the inject field containing the ModuleEntry* is null then return the
3337 // class loader's unnamed module.
3338 oop loader = java_lang_Module::loader(module);
3339 Handle h_loader = Handle(Thread::current(), loader);
3340 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3341 return loader_cld->unnamed_module();
3342 }
3343 return module_entry;
3344 }
3345
set_module_entry(oop module,ModuleEntry * module_entry)3346 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3347 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3348 assert(module != NULL, "module can't be null");
3349 assert(oopDesc::is_oop(module), "module must be oop");
3350 module->address_field_put(_module_entry_offset, (address)module_entry);
3351 }
3352
create(TRAPS)3353 Handle reflect_ConstantPool::create(TRAPS) {
3354 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3355 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3356 // Ensure it is initialized
3357 k->initialize(CHECK_NH);
3358 return k->allocate_instance_handle(THREAD);
3359 }
3360
3361
set_cp(oop reflect,ConstantPool * value)3362 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3363 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3364 oop mirror = value->pool_holder()->java_mirror();
3365 // Save the mirror to get back the constant pool.
3366 reflect->obj_field_put(_oop_offset, mirror);
3367 }
3368
get_cp(oop reflect)3369 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3370 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3371
3372 oop mirror = reflect->obj_field(_oop_offset);
3373 Klass* k = java_lang_Class::as_Klass(mirror);
3374 assert(k->is_instance_klass(), "Must be");
3375
3376 // Get the constant pool back from the klass. Since class redefinition
3377 // merges the new constant pool into the old, this is essentially the
3378 // same constant pool as the original. If constant pool merging is
3379 // no longer done in the future, this will have to change to save
3380 // the original.
3381 return InstanceKlass::cast(k)->constants();
3382 }
3383
3384 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3385 macro(_base_offset, k, "base", object_signature, false)
3386
compute_offsets()3387 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3388 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3389 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3390 }
3391
3392 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3393 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3394 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3395 }
3396 #endif
3397
initialize_and_allocate(BasicType type,TRAPS)3398 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3399 Klass* k = SystemDictionary::box_klass(type);
3400 if (k == NULL) return NULL;
3401 InstanceKlass* ik = InstanceKlass::cast(k);
3402 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3403 return ik->allocate_instance(THREAD);
3404 }
3405
3406
create(BasicType type,jvalue * value,TRAPS)3407 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3408 oop box = initialize_and_allocate(type, CHECK_0);
3409 if (box == NULL) return NULL;
3410 switch (type) {
3411 case T_BOOLEAN:
3412 box->bool_field_put(value_offset, value->z);
3413 break;
3414 case T_CHAR:
3415 box->char_field_put(value_offset, value->c);
3416 break;
3417 case T_FLOAT:
3418 box->float_field_put(value_offset, value->f);
3419 break;
3420 case T_DOUBLE:
3421 box->double_field_put(long_value_offset, value->d);
3422 break;
3423 case T_BYTE:
3424 box->byte_field_put(value_offset, value->b);
3425 break;
3426 case T_SHORT:
3427 box->short_field_put(value_offset, value->s);
3428 break;
3429 case T_INT:
3430 box->int_field_put(value_offset, value->i);
3431 break;
3432 case T_LONG:
3433 box->long_field_put(long_value_offset, value->j);
3434 break;
3435 default:
3436 return NULL;
3437 }
3438 return box;
3439 }
3440
3441
basic_type(oop box)3442 BasicType java_lang_boxing_object::basic_type(oop box) {
3443 if (box == NULL) return T_ILLEGAL;
3444 BasicType type = SystemDictionary::box_klass_type(box->klass());
3445 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3446 return T_ILLEGAL;
3447 return type;
3448 }
3449
3450
get_value(oop box,jvalue * value)3451 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3452 BasicType type = SystemDictionary::box_klass_type(box->klass());
3453 switch (type) {
3454 case T_BOOLEAN:
3455 value->z = box->bool_field(value_offset);
3456 break;
3457 case T_CHAR:
3458 value->c = box->char_field(value_offset);
3459 break;
3460 case T_FLOAT:
3461 value->f = box->float_field(value_offset);
3462 break;
3463 case T_DOUBLE:
3464 value->d = box->double_field(long_value_offset);
3465 break;
3466 case T_BYTE:
3467 value->b = box->byte_field(value_offset);
3468 break;
3469 case T_SHORT:
3470 value->s = box->short_field(value_offset);
3471 break;
3472 case T_INT:
3473 value->i = box->int_field(value_offset);
3474 break;
3475 case T_LONG:
3476 value->j = box->long_field(long_value_offset);
3477 break;
3478 default:
3479 return T_ILLEGAL;
3480 } // end switch
3481 return type;
3482 }
3483
3484
set_value(oop box,jvalue * value)3485 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3486 BasicType type = SystemDictionary::box_klass_type(box->klass());
3487 switch (type) {
3488 case T_BOOLEAN:
3489 box->bool_field_put(value_offset, value->z);
3490 break;
3491 case T_CHAR:
3492 box->char_field_put(value_offset, value->c);
3493 break;
3494 case T_FLOAT:
3495 box->float_field_put(value_offset, value->f);
3496 break;
3497 case T_DOUBLE:
3498 box->double_field_put(long_value_offset, value->d);
3499 break;
3500 case T_BYTE:
3501 box->byte_field_put(value_offset, value->b);
3502 break;
3503 case T_SHORT:
3504 box->short_field_put(value_offset, value->s);
3505 break;
3506 case T_INT:
3507 box->int_field_put(value_offset, value->i);
3508 break;
3509 case T_LONG:
3510 box->long_field_put(long_value_offset, value->j);
3511 break;
3512 default:
3513 return T_ILLEGAL;
3514 } // end switch
3515 return type;
3516 }
3517
3518
print(BasicType type,jvalue * value,outputStream * st)3519 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3520 switch (type) {
3521 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3522 case T_CHAR: st->print("%d", value->c); break;
3523 case T_BYTE: st->print("%d", value->b); break;
3524 case T_SHORT: st->print("%d", value->s); break;
3525 case T_INT: st->print("%d", value->i); break;
3526 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3527 case T_FLOAT: st->print("%f", value->f); break;
3528 case T_DOUBLE: st->print("%lf", value->d); break;
3529 default: st->print("type %d?", type); break;
3530 }
3531 }
3532
3533 // Support for java_lang_ref_Reference
3534
is_referent_field(oop obj,ptrdiff_t offset)3535 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3536 assert(obj != NULL, "sanity");
3537 if (offset != java_lang_ref_Reference::referent_offset) {
3538 return false;
3539 }
3540
3541 Klass* k = obj->klass();
3542 if (!k->is_instance_klass()) {
3543 return false;
3544 }
3545
3546 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3547 bool is_reference = ik->reference_type() != REF_NONE;
3548 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3549 return is_reference;
3550 }
3551
3552 // Support for java_lang_ref_SoftReference
3553 //
3554
3555 #define SOFTREFERENCE_FIELDS_DO(macro) \
3556 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3557 macro(static_clock_offset, k, "clock", long_signature, true)
3558
compute_offsets()3559 void java_lang_ref_SoftReference::compute_offsets() {
3560 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3561 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3562 }
3563
3564 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3565 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3566 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3567 }
3568 #endif
3569
timestamp(oop ref)3570 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3571 return ref->long_field(timestamp_offset);
3572 }
3573
clock()3574 jlong java_lang_ref_SoftReference::clock() {
3575 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3576 oop base = ik->static_field_base_raw();
3577 return base->long_field(static_clock_offset);
3578 }
3579
set_clock(jlong value)3580 void java_lang_ref_SoftReference::set_clock(jlong value) {
3581 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3582 oop base = ik->static_field_base_raw();
3583 base->long_field_put(static_clock_offset, value);
3584 }
3585
3586 // Support for java_lang_invoke_DirectMethodHandle
3587
3588 int java_lang_invoke_DirectMethodHandle::_member_offset;
3589
member(oop dmh)3590 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3591 oop member_name = NULL;
3592 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3593 "a DirectMethodHandle oop is expected");
3594 return dmh->obj_field(member_offset_in_bytes());
3595 }
3596
3597 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3598 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3599
compute_offsets()3600 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3601 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3602 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3603 }
3604
3605 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3606 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3607 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3608 }
3609 #endif
3610
3611 // Support for java_lang_invoke_MethodHandle
3612
3613 int java_lang_invoke_MethodHandle::_type_offset;
3614 int java_lang_invoke_MethodHandle::_form_offset;
3615
3616 int java_lang_invoke_MemberName::_clazz_offset;
3617 int java_lang_invoke_MemberName::_name_offset;
3618 int java_lang_invoke_MemberName::_type_offset;
3619 int java_lang_invoke_MemberName::_flags_offset;
3620 int java_lang_invoke_MemberName::_method_offset;
3621 int java_lang_invoke_MemberName::_vmindex_offset;
3622
3623 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3624 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3625
3626 int java_lang_invoke_LambdaForm::_vmentry_offset;
3627
3628 #define METHODHANDLE_FIELDS_DO(macro) \
3629 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3630 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3631
compute_offsets()3632 void java_lang_invoke_MethodHandle::compute_offsets() {
3633 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3634 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3635 }
3636
3637 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3638 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3639 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3640 }
3641 #endif
3642
3643 #define MEMBERNAME_FIELDS_DO(macro) \
3644 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3645 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3646 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3647 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3648 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3649
compute_offsets()3650 void java_lang_invoke_MemberName::compute_offsets() {
3651 InstanceKlass* k = SystemDictionary::MemberName_klass();
3652 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3653 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3654 }
3655
3656 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3657 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3658 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3659 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3660 }
3661 #endif
3662
compute_offsets()3663 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3664 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3665 assert(k != NULL, "jdk mismatch");
3666 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3667 }
3668
3669 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3670 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3671 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3672 }
3673 #endif
3674
3675 #define LAMBDAFORM_FIELDS_DO(macro) \
3676 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3677
compute_offsets()3678 void java_lang_invoke_LambdaForm::compute_offsets() {
3679 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3680 assert (k != NULL, "jdk mismatch");
3681 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3682 }
3683
3684 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3685 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3686 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3687 }
3688 #endif
3689
is_instance(oop obj)3690 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3691 return obj != NULL && is_subclass(obj->klass());
3692 }
3693
3694
type(oop mh)3695 oop java_lang_invoke_MethodHandle::type(oop mh) {
3696 return mh->obj_field(_type_offset);
3697 }
3698
set_type(oop mh,oop mtype)3699 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3700 mh->obj_field_put(_type_offset, mtype);
3701 }
3702
form(oop mh)3703 oop java_lang_invoke_MethodHandle::form(oop mh) {
3704 assert(_form_offset != 0, "");
3705 return mh->obj_field(_form_offset);
3706 }
3707
set_form(oop mh,oop lform)3708 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3709 assert(_form_offset != 0, "");
3710 mh->obj_field_put(_form_offset, lform);
3711 }
3712
3713 /// MemberName accessors
3714
clazz(oop mname)3715 oop java_lang_invoke_MemberName::clazz(oop mname) {
3716 assert(is_instance(mname), "wrong type");
3717 return mname->obj_field(_clazz_offset);
3718 }
3719
set_clazz(oop mname,oop clazz)3720 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3721 assert(is_instance(mname), "wrong type");
3722 mname->obj_field_put(_clazz_offset, clazz);
3723 }
3724
name(oop mname)3725 oop java_lang_invoke_MemberName::name(oop mname) {
3726 assert(is_instance(mname), "wrong type");
3727 return mname->obj_field(_name_offset);
3728 }
3729
set_name(oop mname,oop name)3730 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3731 assert(is_instance(mname), "wrong type");
3732 mname->obj_field_put(_name_offset, name);
3733 }
3734
type(oop mname)3735 oop java_lang_invoke_MemberName::type(oop mname) {
3736 assert(is_instance(mname), "wrong type");
3737 return mname->obj_field(_type_offset);
3738 }
3739
set_type(oop mname,oop type)3740 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3741 assert(is_instance(mname), "wrong type");
3742 mname->obj_field_put(_type_offset, type);
3743 }
3744
flags(oop mname)3745 int java_lang_invoke_MemberName::flags(oop mname) {
3746 assert(is_instance(mname), "wrong type");
3747 return mname->int_field(_flags_offset);
3748 }
3749
set_flags(oop mname,int flags)3750 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3751 assert(is_instance(mname), "wrong type");
3752 mname->int_field_put(_flags_offset, flags);
3753 }
3754
3755
3756 // Return vmtarget from ResolvedMethodName method field through indirection
vmtarget(oop mname)3757 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3758 assert(is_instance(mname), "wrong type");
3759 oop method = mname->obj_field(_method_offset);
3760 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3761 }
3762
is_method(oop mname)3763 bool java_lang_invoke_MemberName::is_method(oop mname) {
3764 assert(is_instance(mname), "must be MemberName");
3765 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3766 }
3767
set_method(oop mname,oop resolved_method)3768 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3769 assert(is_instance(mname), "wrong type");
3770 mname->obj_field_put(_method_offset, resolved_method);
3771 }
3772
vmindex(oop mname)3773 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3774 assert(is_instance(mname), "wrong type");
3775 return (intptr_t) mname->address_field(_vmindex_offset);
3776 }
3777
set_vmindex(oop mname,intptr_t index)3778 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3779 assert(is_instance(mname), "wrong type");
3780 mname->address_field_put(_vmindex_offset, (address) index);
3781 }
3782
3783
vmtarget(oop resolved_method)3784 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3785 assert(is_instance(resolved_method), "wrong type");
3786 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3787 assert(m->is_method(), "must be");
3788 return m;
3789 }
3790
3791 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
set_vmtarget(oop resolved_method,Method * m)3792 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3793 assert(is_instance(resolved_method), "wrong type");
3794 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3795 }
3796
find_resolved_method(const methodHandle & m,TRAPS)3797 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3798 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3799 oop resolved_method = ResolvedMethodTable::find_method(m());
3800 if (resolved_method == NULL) {
3801 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3802 if (!k->is_initialized()) {
3803 k->initialize(CHECK_NULL);
3804 }
3805 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3806 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3807 // Add a reference to the loader (actually mirror because anonymous classes will not have
3808 // distinct loaders) to ensure the metadata is kept alive.
3809 // This mirror may be different than the one in clazz field.
3810 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3811 resolved_method = ResolvedMethodTable::add_method(m, Handle(THREAD, new_resolved_method));
3812 }
3813 return resolved_method;
3814 }
3815
vmentry(oop lform)3816 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3817 assert(is_instance(lform), "wrong type");
3818 return lform->obj_field(_vmentry_offset);
3819 }
3820
3821
3822 // Support for java_lang_invoke_MethodType
3823
3824 int java_lang_invoke_MethodType::_rtype_offset;
3825 int java_lang_invoke_MethodType::_ptypes_offset;
3826
3827 #define METHODTYPE_FIELDS_DO(macro) \
3828 macro(_rtype_offset, k, "rtype", class_signature, false); \
3829 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3830
compute_offsets()3831 void java_lang_invoke_MethodType::compute_offsets() {
3832 InstanceKlass* k = SystemDictionary::MethodType_klass();
3833 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3834 }
3835
3836 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3837 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3838 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3839 }
3840 #endif
3841
print_signature(oop mt,outputStream * st)3842 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3843 st->print("(");
3844 objArrayOop pts = ptypes(mt);
3845 for (int i = 0, limit = pts->length(); i < limit; i++) {
3846 java_lang_Class::print_signature(pts->obj_at(i), st);
3847 }
3848 st->print(")");
3849 java_lang_Class::print_signature(rtype(mt), st);
3850 }
3851
as_signature(oop mt,bool intern_if_not_found,TRAPS)3852 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3853 ResourceMark rm;
3854 stringStream buffer(128);
3855 print_signature(mt, &buffer);
3856 const char* sigstr = buffer.base();
3857 int siglen = (int) buffer.size();
3858 Symbol *name;
3859 if (!intern_if_not_found) {
3860 name = SymbolTable::probe(sigstr, siglen);
3861 } else {
3862 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3863 }
3864 return name;
3865 }
3866
equals(oop mt1,oop mt2)3867 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3868 if (mt1 == mt2)
3869 return true;
3870 if (rtype(mt1) != rtype(mt2))
3871 return false;
3872 if (ptype_count(mt1) != ptype_count(mt2))
3873 return false;
3874 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3875 if (ptype(mt1, i) != ptype(mt2, i))
3876 return false;
3877 }
3878 return true;
3879 }
3880
rtype(oop mt)3881 oop java_lang_invoke_MethodType::rtype(oop mt) {
3882 assert(is_instance(mt), "must be a MethodType");
3883 return mt->obj_field(_rtype_offset);
3884 }
3885
ptypes(oop mt)3886 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3887 assert(is_instance(mt), "must be a MethodType");
3888 return (objArrayOop) mt->obj_field(_ptypes_offset);
3889 }
3890
ptype(oop mt,int idx)3891 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3892 return ptypes(mt)->obj_at(idx);
3893 }
3894
ptype_count(oop mt)3895 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3896 return ptypes(mt)->length();
3897 }
3898
ptype_slot_count(oop mt)3899 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3900 objArrayOop pts = ptypes(mt);
3901 int count = pts->length();
3902 int slots = 0;
3903 for (int i = 0; i < count; i++) {
3904 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3905 slots += type2size[bt];
3906 }
3907 return slots;
3908 }
3909
rtype_slot_count(oop mt)3910 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3911 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3912 return type2size[bt];
3913 }
3914
3915
3916 // Support for java_lang_invoke_CallSite
3917
3918 int java_lang_invoke_CallSite::_target_offset;
3919 int java_lang_invoke_CallSite::_context_offset;
3920
3921 #define CALLSITE_FIELDS_DO(macro) \
3922 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3923 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3924
compute_offsets()3925 void java_lang_invoke_CallSite::compute_offsets() {
3926 InstanceKlass* k = SystemDictionary::CallSite_klass();
3927 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3928 }
3929
3930 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3931 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3932 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3933 }
3934 #endif
3935
context(oop call_site)3936 oop java_lang_invoke_CallSite::context(oop call_site) {
3937 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3938
3939 oop dep_oop = call_site->obj_field(_context_offset);
3940 return dep_oop;
3941 }
3942
3943 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3944
3945 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3946
compute_offsets()3947 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3948 InstanceKlass* k = SystemDictionary::Context_klass();
3949 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3950 }
3951
3952 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3953 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3954 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3955 }
3956 #endif
3957
vmdependencies(oop call_site)3958 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3959 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3960 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset);
3961 DependencyContext dep_ctx(vmdeps_addr);
3962 return dep_ctx;
3963 }
3964
3965 // Support for java_security_AccessControlContext
3966
3967 int java_security_AccessControlContext::_context_offset = 0;
3968 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3969 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3970 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3971
3972 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3973 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3974 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3975 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3976 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3977
compute_offsets()3978 void java_security_AccessControlContext::compute_offsets() {
3979 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3980 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3981 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3982 }
3983
3984 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)3985 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3986 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3987 }
3988 #endif
3989
is_authorized(Handle context)3990 bool java_security_AccessControlContext::is_authorized(Handle context) {
3991 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3992 assert(_isAuthorized_offset != -1, "should be set");
3993 return context->bool_field(_isAuthorized_offset) != 0;
3994 }
3995
create(objArrayHandle context,bool isPrivileged,Handle privileged_context,TRAPS)3996 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3997 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3998 // Ensure klass is initialized
3999 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
4000 // Allocate result
4001 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
4002 // Fill in values
4003 result->obj_field_put(_context_offset, context());
4004 result->obj_field_put(_privilegedContext_offset, privileged_context());
4005 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4006 // whitelist AccessControlContexts created by the JVM if present
4007 if (_isAuthorized_offset != -1) {
4008 result->bool_field_put(_isAuthorized_offset, true);
4009 }
4010 return result;
4011 }
4012
4013
4014 // Support for java_lang_ClassLoader
4015
4016 bool java_lang_ClassLoader::offsets_computed = false;
4017 int java_lang_ClassLoader::_loader_data_offset = -1;
4018 int java_lang_ClassLoader::parallelCapable_offset = -1;
4019 int java_lang_ClassLoader::name_offset = -1;
4020 int java_lang_ClassLoader::nameAndId_offset = -1;
4021 int java_lang_ClassLoader::unnamedModule_offset = -1;
4022
loader_data_acquire(oop loader)4023 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4024 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
4025 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
4026 }
4027
loader_data_raw(oop loader)4028 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
4029 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
4030 return RawAccess<>::load_at(loader, _loader_data_offset);
4031 }
4032
release_set_loader_data(oop loader,ClassLoaderData * new_data)4033 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4034 assert(loader != NULL, "loader must not be NULL");
4035 assert(oopDesc::is_oop(loader), "loader must be oop");
4036 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
4037 }
4038
4039 #define CLASSLOADER_FIELDS_DO(macro) \
4040 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4041 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4042 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
4043 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4044 macro(parent_offset, k1, "parent", classloader_signature, false)
4045
compute_offsets()4046 void java_lang_ClassLoader::compute_offsets() {
4047 assert(!offsets_computed, "offsets should be initialized only once");
4048 offsets_computed = true;
4049
4050 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
4051 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4052
4053 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4054 }
4055
4056 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4057 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4058 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4059 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4060 }
4061 #endif
4062
parent(oop loader)4063 oop java_lang_ClassLoader::parent(oop loader) {
4064 assert(is_instance(loader), "loader must be oop");
4065 return loader->obj_field(parent_offset);
4066 }
4067
4068 // Returns the name field of this class loader. If the name field has not
4069 // been set, null will be returned.
name(oop loader)4070 oop java_lang_ClassLoader::name(oop loader) {
4071 assert(is_instance(loader), "loader must be oop");
4072 return loader->obj_field(name_offset);
4073 }
4074
4075 // Returns the nameAndId field of this class loader. The format is
4076 // as follows:
4077 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4078 // If the defining loader has no name then <qualified-class-name> @<id>
4079 // If built-in loader, then omit '@<id>' as there is only one instance.
4080 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
nameAndId(oop loader)4081 oop java_lang_ClassLoader::nameAndId(oop loader) {
4082 assert(is_instance(loader), "loader must be oop");
4083 return loader->obj_field(nameAndId_offset);
4084 }
4085
isAncestor(oop loader,oop cl)4086 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4087 assert(is_instance(loader), "loader must be oop");
4088 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4089 oop acl = loader;
4090 debug_only(jint loop_count = 0);
4091 // This loop taken verbatim from ClassLoader.java:
4092 do {
4093 acl = parent(acl);
4094 if (cl == acl) {
4095 return true;
4096 }
4097 assert(++loop_count > 0, "loop_count overflow");
4098 } while (acl != NULL);
4099 return false;
4100 }
4101
is_instance(oop obj)4102 bool java_lang_ClassLoader::is_instance(oop obj) {
4103 return obj != NULL && is_subclass(obj->klass());
4104 }
4105
4106
4107 // For class loader classes, parallelCapable defined
4108 // based on non-null field
4109 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
parallelCapable(oop class_loader)4110 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4111 if (parallelCapable_offset == -1) {
4112 // Default for backward compatibility is false
4113 return false;
4114 }
4115 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4116 }
4117
is_trusted_loader(oop loader)4118 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4119 // Fix for 4474172; see evaluation for more details
4120 loader = non_reflection_class_loader(loader);
4121
4122 oop cl = SystemDictionary::java_system_loader();
4123 while(cl != NULL) {
4124 if (cl == loader) return true;
4125 cl = parent(cl);
4126 }
4127 return false;
4128 }
4129
4130 // Return true if this is one of the class loaders associated with
4131 // the generated bytecodes for reflection.
is_reflection_class_loader(oop loader)4132 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4133 if (loader != NULL) {
4134 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4135 // This might be null in non-1.4 JDKs
4136 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4137 }
4138 return false;
4139 }
4140
non_reflection_class_loader(oop loader)4141 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4142 // See whether this is one of the class loaders associated with
4143 // the generated bytecodes for reflection, and if so, "magically"
4144 // delegate to its parent to prevent class loading from occurring
4145 // in places where applications using reflection didn't expect it.
4146 if (is_reflection_class_loader(loader)) {
4147 return parent(loader);
4148 }
4149 return loader;
4150 }
4151
unnamedModule(oop loader)4152 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4153 assert(is_instance(loader), "loader must be oop");
4154 return loader->obj_field(unnamedModule_offset);
4155 }
4156
4157 // Support for java_lang_System
4158 //
4159 #define SYSTEM_FIELDS_DO(macro) \
4160 macro(static_in_offset, k, "in", input_stream_signature, true); \
4161 macro(static_out_offset, k, "out", print_stream_signature, true); \
4162 macro(static_err_offset, k, "err", print_stream_signature, true); \
4163 macro(static_security_offset, k, "security", security_manager_signature, true)
4164
compute_offsets()4165 void java_lang_System::compute_offsets() {
4166 InstanceKlass* k = SystemDictionary::System_klass();
4167 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4168 }
4169
4170 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4171 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4172 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4173 }
4174 #endif
4175
in_offset_in_bytes()4176 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
out_offset_in_bytes()4177 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
err_offset_in_bytes()4178 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4179
4180
has_security_manager()4181 bool java_lang_System::has_security_manager() {
4182 InstanceKlass* ik = SystemDictionary::System_klass();
4183 oop base = ik->static_field_base_raw();
4184 return base->obj_field(static_security_offset) != NULL;
4185 }
4186
4187 int java_lang_Class::_klass_offset;
4188 int java_lang_Class::_array_klass_offset;
4189 int java_lang_Class::_oop_size_offset;
4190 int java_lang_Class::_static_oop_field_count_offset;
4191 int java_lang_Class::_class_loader_offset;
4192 int java_lang_Class::_module_offset;
4193 int java_lang_Class::_protection_domain_offset;
4194 int java_lang_Class::_component_mirror_offset;
4195 int java_lang_Class::_init_lock_offset;
4196 int java_lang_Class::_signers_offset;
4197 int java_lang_Class::_name_offset;
4198 int java_lang_Class::_source_file_offset;
4199 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4200 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4201 int java_lang_Throwable::backtrace_offset;
4202 int java_lang_Throwable::detailMessage_offset;
4203 int java_lang_Throwable::stackTrace_offset;
4204 int java_lang_Throwable::depth_offset;
4205 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4206 int java_lang_reflect_AccessibleObject::override_offset;
4207 int java_lang_reflect_Method::clazz_offset;
4208 int java_lang_reflect_Method::name_offset;
4209 int java_lang_reflect_Method::returnType_offset;
4210 int java_lang_reflect_Method::parameterTypes_offset;
4211 int java_lang_reflect_Method::exceptionTypes_offset;
4212 int java_lang_reflect_Method::slot_offset;
4213 int java_lang_reflect_Method::modifiers_offset;
4214 int java_lang_reflect_Method::signature_offset;
4215 int java_lang_reflect_Method::annotations_offset;
4216 int java_lang_reflect_Method::parameter_annotations_offset;
4217 int java_lang_reflect_Method::annotation_default_offset;
4218 int java_lang_reflect_Method::type_annotations_offset;
4219 int java_lang_reflect_Constructor::clazz_offset;
4220 int java_lang_reflect_Constructor::parameterTypes_offset;
4221 int java_lang_reflect_Constructor::exceptionTypes_offset;
4222 int java_lang_reflect_Constructor::slot_offset;
4223 int java_lang_reflect_Constructor::modifiers_offset;
4224 int java_lang_reflect_Constructor::signature_offset;
4225 int java_lang_reflect_Constructor::annotations_offset;
4226 int java_lang_reflect_Constructor::parameter_annotations_offset;
4227 int java_lang_reflect_Constructor::type_annotations_offset;
4228 int java_lang_reflect_Field::clazz_offset;
4229 int java_lang_reflect_Field::name_offset;
4230 int java_lang_reflect_Field::type_offset;
4231 int java_lang_reflect_Field::slot_offset;
4232 int java_lang_reflect_Field::modifiers_offset;
4233 int java_lang_reflect_Field::signature_offset;
4234 int java_lang_reflect_Field::annotations_offset;
4235 int java_lang_reflect_Field::type_annotations_offset;
4236 int java_lang_reflect_Parameter::name_offset;
4237 int java_lang_reflect_Parameter::modifiers_offset;
4238 int java_lang_reflect_Parameter::index_offset;
4239 int java_lang_reflect_Parameter::executable_offset;
4240 int java_lang_boxing_object::value_offset;
4241 int java_lang_boxing_object::long_value_offset;
4242 int java_lang_ref_Reference::referent_offset;
4243 int java_lang_ref_Reference::queue_offset;
4244 int java_lang_ref_Reference::next_offset;
4245 int java_lang_ref_Reference::discovered_offset;
4246 int java_lang_ref_SoftReference::timestamp_offset;
4247 int java_lang_ref_SoftReference::static_clock_offset;
4248 int java_lang_ClassLoader::parent_offset;
4249 int java_lang_System::static_in_offset;
4250 int java_lang_System::static_out_offset;
4251 int java_lang_System::static_err_offset;
4252 int java_lang_System::static_security_offset;
4253 int java_lang_StackTraceElement::methodName_offset;
4254 int java_lang_StackTraceElement::fileName_offset;
4255 int java_lang_StackTraceElement::lineNumber_offset;
4256 int java_lang_StackTraceElement::moduleName_offset;
4257 int java_lang_StackTraceElement::moduleVersion_offset;
4258 int java_lang_StackTraceElement::classLoaderName_offset;
4259 int java_lang_StackTraceElement::declaringClass_offset;
4260 int java_lang_StackTraceElement::declaringClassObject_offset;
4261 int java_lang_StackFrameInfo::_memberName_offset;
4262 int java_lang_StackFrameInfo::_bci_offset;
4263 int java_lang_StackFrameInfo::_version_offset;
4264 int java_lang_LiveStackFrameInfo::_monitors_offset;
4265 int java_lang_LiveStackFrameInfo::_locals_offset;
4266 int java_lang_LiveStackFrameInfo::_operands_offset;
4267 int java_lang_LiveStackFrameInfo::_mode_offset;
4268 int java_lang_AssertionStatusDirectives::classes_offset;
4269 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4270 int java_lang_AssertionStatusDirectives::packages_offset;
4271 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4272 int java_lang_AssertionStatusDirectives::deflt_offset;
4273 int java_nio_Buffer::_limit_offset;
4274 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4275 int reflect_ConstantPool::_oop_offset;
4276 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4277
4278
4279 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4280 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4281 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4282 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4283 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4284 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4285 macro(methodName_offset, k, "methodName", string_signature, false); \
4286 macro(fileName_offset, k, "fileName", string_signature, false); \
4287 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4288
4289 // Support for java_lang_StackTraceElement
compute_offsets()4290 void java_lang_StackTraceElement::compute_offsets() {
4291 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4292 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4293 }
4294
4295 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4296 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4297 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4298 }
4299 #endif
4300
set_fileName(oop element,oop value)4301 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4302 element->obj_field_put(fileName_offset, value);
4303 }
4304
set_declaringClass(oop element,oop value)4305 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4306 element->obj_field_put(declaringClass_offset, value);
4307 }
4308
set_methodName(oop element,oop value)4309 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4310 element->obj_field_put(methodName_offset, value);
4311 }
4312
set_lineNumber(oop element,int value)4313 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4314 element->int_field_put(lineNumber_offset, value);
4315 }
4316
set_moduleName(oop element,oop value)4317 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4318 element->obj_field_put(moduleName_offset, value);
4319 }
4320
set_moduleVersion(oop element,oop value)4321 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4322 element->obj_field_put(moduleVersion_offset, value);
4323 }
4324
set_classLoaderName(oop element,oop value)4325 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4326 element->obj_field_put(classLoaderName_offset, value);
4327 }
4328
set_declaringClassObject(oop element,oop value)4329 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4330 element->obj_field_put(declaringClassObject_offset, value);
4331 }
4332
set_version(oop element,short value)4333 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4334 element->short_field_put(_version_offset, value);
4335 }
4336
set_bci(oop element,int value)4337 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4338 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
4339 element->int_field_put(_bci_offset, value);
4340 }
4341
set_monitors(oop element,oop value)4342 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4343 element->obj_field_put(_monitors_offset, value);
4344 }
4345
set_locals(oop element,oop value)4346 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4347 element->obj_field_put(_locals_offset, value);
4348 }
4349
set_operands(oop element,oop value)4350 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4351 element->obj_field_put(_operands_offset, value);
4352 }
4353
set_mode(oop element,int value)4354 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4355 element->int_field_put(_mode_offset, value);
4356 }
4357
4358 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4359 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4360 macro(classes_offset, k, "classes", string_array_signature, false); \
4361 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4362 macro(packages_offset, k, "packages", string_array_signature, false); \
4363 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4364 macro(deflt_offset, k, "deflt", bool_signature, false)
4365
compute_offsets()4366 void java_lang_AssertionStatusDirectives::compute_offsets() {
4367 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4368 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4369 }
4370
4371 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4372 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4373 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4374 }
4375 #endif
4376
set_classes(oop o,oop val)4377 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4378 o->obj_field_put(classes_offset, val);
4379 }
4380
set_classEnabled(oop o,oop val)4381 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4382 o->obj_field_put(classEnabled_offset, val);
4383 }
4384
set_packages(oop o,oop val)4385 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4386 o->obj_field_put(packages_offset, val);
4387 }
4388
set_packageEnabled(oop o,oop val)4389 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4390 o->obj_field_put(packageEnabled_offset, val);
4391 }
4392
set_deflt(oop o,bool val)4393 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4394 o->bool_field_put(deflt_offset, val);
4395 }
4396
4397
4398 // Support for intrinsification of java.nio.Buffer.checkIndex
limit_offset()4399 int java_nio_Buffer::limit_offset() {
4400 return _limit_offset;
4401 }
4402
4403 #define BUFFER_FIELDS_DO(macro) \
4404 macro(_limit_offset, k, "limit", int_signature, false)
4405
compute_offsets()4406 void java_nio_Buffer::compute_offsets() {
4407 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4408 assert(k != NULL, "must be loaded in 1.4+");
4409 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4410 }
4411
4412 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4413 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4414 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4415 }
4416 #endif
4417
4418 #define AOS_FIELDS_DO(macro) \
4419 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4420
compute_offsets()4421 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4422 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4423 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4424 }
4425
get_owner_threadObj(oop obj)4426 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4427 assert(_owner_offset != 0, "Must be initialized");
4428 return obj->obj_field(_owner_offset);
4429 }
4430
4431 #if INCLUDE_CDS
serialize_offsets(SerializeClosure * f)4432 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4433 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4434 }
4435 #endif
4436
member_offset(int hardcoded_offset)4437 static int member_offset(int hardcoded_offset) {
4438 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4439 }
4440
4441 // Compute hard-coded offsets
4442 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4443 // are not available to determine the offset_of_static_fields.
compute_hard_coded_offsets()4444 void JavaClasses::compute_hard_coded_offsets() {
4445
4446 // java_lang_boxing_object
4447 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4448 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4449
4450 // java_lang_ref_Reference
4451 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4452 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4453 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4454 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4455 }
4456
4457 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4458
4459 // Compute non-hard-coded field offsets of all the classes in this file
compute_offsets()4460 void JavaClasses::compute_offsets() {
4461 if (UseSharedSpaces) {
4462 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4463 JvmtiExport::has_early_class_hook_env()),
4464 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4465 // None of the classes used by the rest of this function can be replaced by
4466 // JMVTI ClassFileLoadHook.
4467 // We are safe to use the archived offsets, which have already been restored
4468 // by JavaClasses::serialize_offsets, without computing the offsets again.
4469 return;
4470 }
4471
4472 // We have already called the compute_offsets() of the
4473 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4474 // earlier inside SystemDictionary::resolve_well_known_classes()
4475 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4476
4477 // generated interpreter code wants to know about the offsets we just computed:
4478 AbstractAssembler::update_delayed_values();
4479 }
4480
4481 #if INCLUDE_CDS
4482 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4483
serialize_offsets(SerializeClosure * soc)4484 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4485 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4486 }
4487 #endif
4488
4489
4490 #ifndef PRODUCT
4491
4492 // These functions exist to assert the validity of hard-coded field offsets to guard
4493 // against changes in the class files
4494
check_offset(const char * klass_name,int hardcoded_offset,const char * field_name,const char * field_sig)4495 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4496 EXCEPTION_MARK;
4497 fieldDescriptor fd;
4498 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4499 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4500 InstanceKlass* ik = InstanceKlass::cast(k);
4501 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4502 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4503 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4504 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4505 return false;
4506 }
4507 if (fd.is_static()) {
4508 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4509 return false;
4510 }
4511 if (fd.offset() == hardcoded_offset ) {
4512 return true;
4513 } else {
4514 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4515 klass_name, field_name, hardcoded_offset, fd.offset());
4516 return false;
4517 }
4518 }
4519
4520 // Check the hard-coded field offsets of all the classes in this file
4521
check_offsets()4522 void JavaClasses::check_offsets() {
4523 bool valid = true;
4524
4525 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4526 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4527
4528 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4529 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4530
4531 // Boxed primitive objects (java_lang_boxing_object)
4532
4533 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4534 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4535 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4536 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4537 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4538 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4539 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4540 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4541
4542 // java.lang.ref.Reference
4543
4544 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4545 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4546 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4547 // Fake field
4548 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4549
4550 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4551 }
4552
4553 #endif // PRODUCT
4554
compute_offset()4555 int InjectedField::compute_offset() {
4556 InstanceKlass* ik = InstanceKlass::cast(klass());
4557 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4558 if (!may_be_java && !fs.access_flags().is_internal()) {
4559 // Only look at injected fields
4560 continue;
4561 }
4562 if (fs.name() == name() && fs.signature() == signature()) {
4563 return fs.offset();
4564 }
4565 }
4566 ResourceMark rm;
4567 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)" : "");
4568 #ifndef PRODUCT
4569 ik->print();
4570 tty->print_cr("all fields:");
4571 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4572 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4573 }
4574 #endif //PRODUCT
4575 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4576 return -1;
4577 }
4578
javaClasses_init()4579 void javaClasses_init() {
4580 JavaClasses::compute_offsets();
4581 JavaClasses::check_offsets();
4582 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4583 }
4584