1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/classLoaderData.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "code/debugInfo.hpp"
34 #include "code/dependencyContext.hpp"
35 #include "code/pcDesc.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/heapShared.inline.hpp"
41 #include "memory/metaspaceShared.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/fieldStreams.inline.hpp"
46 #include "oops/instanceKlass.hpp"
47 #include "oops/instanceMirrorKlass.hpp"
48 #include "oops/klass.hpp"
49 #include "oops/method.inline.hpp"
50 #include "oops/objArrayOop.inline.hpp"
51 #include "oops/oop.inline.hpp"
52 #include "oops/symbol.hpp"
53 #include "oops/typeArrayOop.inline.hpp"
54 #include "oops/valueArrayKlass.hpp"
55 #include "oops/valueKlass.inline.hpp"
56 #include "prims/jvmtiExport.hpp"
57 #include "prims/resolvedMethodTable.hpp"
58 #include "runtime/fieldDescriptor.inline.hpp"
59 #include "runtime/frame.inline.hpp"
60 #include "runtime/handles.inline.hpp"
61 #include "runtime/init.hpp"
62 #include "runtime/interfaceSupport.inline.hpp"
63 #include "runtime/java.hpp"
64 #include "runtime/javaCalls.hpp"
65 #include "runtime/jniHandles.inline.hpp"
66 #include "runtime/safepoint.hpp"
67 #include "runtime/safepointVerifiers.hpp"
68 #include "runtime/thread.inline.hpp"
69 #include "runtime/vframe.inline.hpp"
70 #include "runtime/vm_version.hpp"
71 #include "utilities/align.hpp"
72 #include "utilities/preserveException.hpp"
73 #include "utilities/utf8.hpp"
74 #if INCLUDE_JVMCI
75 #include "jvmci/jvmciJavaClasses.hpp"
76 #endif
77
78 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
79 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
80
81 #if INCLUDE_CDS
82 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
83 f->do_u4((u4*)&_##name##_offset);
84 #endif
85
86 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
87 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
88
89 InjectedField JavaClasses::_injected_fields[] = {
90 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
91 };
92
93 // Register native methods of Object
94 void java_lang_Object::register_natives(TRAPS) {
95 InstanceKlass* obj = SystemDictionary::Object_klass();
96 Method::register_native(obj, vmSymbols::hashCode_name(),
97 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
98 Method::register_native(obj, vmSymbols::wait_name(),
99 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
100 Method::register_native(obj, vmSymbols::notify_name(),
101 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
102 Method::register_native(obj, vmSymbols::notifyAll_name(),
103 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
104 Method::register_native(obj, vmSymbols::clone_name(),
105 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
106 }
107
108 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
109 return _injected_fields[id].compute_offset();
110 }
111
112 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
113 *field_count = 0;
114
115 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
116 if (sid == vmSymbols::NO_SID) {
117 // Only well known classes can inject fields
118 return NULL;
119 }
120
121 int count = 0;
122 int start = -1;
123
124 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
125 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
126 count++; \
127 if (start == -1) start = klass##_##name##_enum; \
128 }
129 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
130 #undef LOOKUP_INJECTED_FIELD
131
132 if (start != -1) {
133 *field_count = count;
134 return _injected_fields + start;
135 }
136 return NULL;
137 }
138
139
140 // Helpful routine for computing field offsets at run time rather than hardcoding them
141 // Finds local fields only, including static fields. Static field offsets are from the
142 // beginning of the mirror.
143 static void compute_offset(int &dest_offset,
144 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
145 bool is_static = false) {
146 fieldDescriptor fd;
147 if (ik == NULL) {
148 ResourceMark rm;
149 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
150 vm_exit_during_initialization("Invalid layout of well-known class");
151 }
152
153 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
154 ResourceMark rm;
155 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
156 name_symbol->as_C_string(), signature_symbol->as_C_string());
157 #ifndef PRODUCT
158 // Prints all fields and offsets
159 Log(class) lt;
160 LogStream ls(lt.error());
161 ik->print_on(&ls);
162 #endif //PRODUCT
163 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
164 }
165 dest_offset = fd.offset();
166 }
167
168 // Overloading to pass name as a string.
169 static void compute_offset(int& dest_offset, InstanceKlass* ik,
170 const char* name_string, Symbol* signature_symbol,
171 bool is_static = false) {
172 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
173 if (name == NULL) {
174 ResourceMark rm;
175 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
176 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
177 }
178 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
179 }
180
181 int java_lang_String::value_offset = 0;
182 int java_lang_String::hash_offset = 0;
183 int java_lang_String::hashIsZero_offset = 0;
184 int java_lang_String::coder_offset = 0;
185
186 bool java_lang_String::initialized = false;
187
188 bool java_lang_String::is_instance(oop obj) {
189 return is_instance_inlined(obj);
190 }
191
192 #if INCLUDE_CDS
193 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
194 f->do_u4((u4*)&offset)
195 #endif
196
197 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
198 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
199
200 #define STRING_FIELDS_DO(macro) \
201 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
202 macro(hash_offset, k, "hash", int_signature, false); \
203 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
204 macro(coder_offset, k, "coder", byte_signature, false);
205
206 void java_lang_String::compute_offsets() {
207 if (initialized) {
208 return;
209 }
210
211 InstanceKlass* k = SystemDictionary::String_klass();
212 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
213
214 initialized = true;
215 }
216
217 #if INCLUDE_CDS
218 void java_lang_String::serialize_offsets(SerializeClosure* f) {
219 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
220 f->do_bool(&initialized);
221 }
222 #endif
223
224 class CompactStringsFixup : public FieldClosure {
225 private:
226 bool _value;
227
228 public:
229 CompactStringsFixup(bool value) : _value(value) {}
230
231 void do_field(fieldDescriptor* fd) {
232 if (fd->name() == vmSymbols::compact_strings_name()) {
233 oop mirror = fd->field_holder()->java_mirror();
234 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
235 assert(mirror != NULL, "String must have mirror already");
236 mirror->bool_field_put(fd->offset(), _value);
237 }
238 }
239 };
240
241 void java_lang_String::set_compact_strings(bool value) {
242 CompactStringsFixup fix(value);
243 SystemDictionary::String_klass()->do_local_static_fields(&fix);
244 }
245
246 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
247 assert(initialized, "Must be initialized");
248 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
249
250 // Create the String object first, so there's a chance that the String
251 // and the char array it points to end up in the same cache line.
252 oop obj;
253 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
254
255 // Create the char array. The String object must be handlized here
256 // because GC can happen as a result of the allocation attempt.
257 Handle h_obj(THREAD, obj);
258 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
259 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
260
261 // Point the String at the char array
262 obj = h_obj();
263 set_value(obj, buffer);
264 // No need to zero the offset, allocation zero'ed the entire String object
265 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
266 return h_obj;
267 }
268
269 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
270 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
271 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
272 typeArrayOop buffer = value(h_obj());
273 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
274 if (is_latin1) {
275 for (int index = 0; index < length; index++) {
276 buffer->byte_at_put(index, (jbyte)unicode[index]);
277 }
278 } else {
279 for (int index = 0; index < length; index++) {
280 buffer->char_at_put(index, unicode[index]);
281 }
282 }
283
284 #ifdef ASSERT
285 {
286 ResourceMark rm;
287 char* expected = UNICODE::as_utf8(unicode, length);
288 char* actual = as_utf8_string(h_obj());
289 if (strcmp(expected, actual) != 0) {
290 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
291 ShouldNotReachHere();
292 }
293 }
294 #endif
295
296 return h_obj;
297 }
298
299 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
300 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
301 return h_obj();
302 }
303
304 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
305 if (utf8_str == NULL) {
306 return Handle();
307 }
308 bool has_multibyte, is_latin1;
309 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
310 if (!CompactStrings) {
311 has_multibyte = true;
312 is_latin1 = false;
313 }
314
315 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
316 if (length > 0) {
317 if (!has_multibyte) {
318 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
319 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
320 } else if (is_latin1) {
321 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
322 } else {
323 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
324 }
325 }
326
327 #ifdef ASSERT
328 // This check is too strict because the input string is not necessarily valid UTF8.
329 // For example, it may be created with arbitrary content via jni_NewStringUTF.
330 /*
331 {
332 ResourceMark rm;
333 const char* expected = utf8_str;
334 char* actual = as_utf8_string(h_obj());
335 if (strcmp(expected, actual) != 0) {
336 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
337 ShouldNotReachHere();
338 }
339 }
340 */
341 #endif
342
343 return h_obj;
344 }
345
346 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
347 Handle h_obj = create_from_str(utf8_str, CHECK_0);
348 return h_obj();
349 }
350
351 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
352 const char* utf8_str = (char*)symbol->bytes();
353 int utf8_len = symbol->utf8_length();
354
355 bool has_multibyte, is_latin1;
356 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
357 if (!CompactStrings) {
358 has_multibyte = true;
359 is_latin1 = false;
360 }
361
362 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
363 if (length > 0) {
364 if (!has_multibyte) {
365 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
366 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
367 } else if (is_latin1) {
368 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
369 } else {
370 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
371 }
372 }
373
374 #ifdef ASSERT
375 {
376 ResourceMark rm;
377 const char* expected = symbol->as_utf8();
378 char* actual = as_utf8_string(h_obj());
379 if (strncmp(expected, actual, utf8_len) != 0) {
380 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
381 ShouldNotReachHere();
382 }
383 }
384 #endif
385
386 return h_obj;
387 }
388
389 // Converts a C string to a Java String based on current encoding
390 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
391 assert(str != NULL, "bad arguments");
392
393 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
394 static to_java_string_fn_t _to_java_string_fn = NULL;
395
396 if (_to_java_string_fn == NULL) {
397 void *lib_handle = os::native_java_library();
398 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
399 #if defined(_WIN32) && !defined(_WIN64)
400 if (_to_java_string_fn == NULL) {
401 // On 32 bit Windows, also try __stdcall decorated name
402 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
403 }
404 #endif
405 if (_to_java_string_fn == NULL) {
406 fatal("JNU_NewStringPlatform missing");
407 }
408 }
409
410 jstring js = NULL;
411 {
412 assert(THREAD->is_Java_thread(), "must be java thread");
413 JavaThread* thread = (JavaThread*)THREAD;
414 HandleMark hm(thread);
415 ThreadToNativeFromVM ttn(thread);
416 js = (_to_java_string_fn)(thread->jni_environment(), str);
417 }
418
419 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
420 JNIHandles::destroy_local(js); // destroy local JNIHandle.
421 return native_platform_string;
422 }
423
424 // Converts a Java String to a native C string that can be used for
425 // native OS calls.
426 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
427 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
428 static to_platform_string_fn_t _to_platform_string_fn = NULL;
429
430 if (_to_platform_string_fn == NULL) {
431 void *lib_handle = os::native_java_library();
432 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
433 if (_to_platform_string_fn == NULL) {
434 fatal("GetStringPlatformChars missing");
435 }
436 }
437
438 char *native_platform_string;
439 { JavaThread* thread = (JavaThread*)THREAD;
440 assert(thread->is_Java_thread(), "must be java thread");
441 JNIEnv *env = thread->jni_environment();
442 jstring js = (jstring) JNIHandles::make_local(env, java_string());
443 bool is_copy;
444 HandleMark hm(thread);
445 ThreadToNativeFromVM ttn(thread);
446 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
447 assert(is_copy == JNI_TRUE, "is_copy value changed");
448 JNIHandles::destroy_local(js);
449 }
450 return native_platform_string;
451 }
452
453 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
454 oop obj = java_string();
455 // Typical usage is to convert all '/' to '.' in string.
456 typeArrayOop value = java_lang_String::value(obj);
457 int length = java_lang_String::length(obj, value);
458 bool is_latin1 = java_lang_String::is_latin1(obj);
459
460 // First check if any from_char exist
461 int index; // Declared outside, used later
462 for (index = 0; index < length; index++) {
463 jchar c = !is_latin1 ? value->char_at(index) :
464 ((jchar) value->byte_at(index)) & 0xff;
465 if (c == from_char) {
466 break;
467 }
468 }
469 if (index == length) {
470 // No from_char, so do not copy.
471 return java_string;
472 }
473
474 // Check if result string will be latin1
475 bool to_is_latin1 = false;
476
477 // Replacement char must be latin1
478 if (CompactStrings && UNICODE::is_latin1(to_char)) {
479 if (is_latin1) {
480 // Source string is latin1 as well
481 to_is_latin1 = true;
482 } else if (!UNICODE::is_latin1(from_char)) {
483 // We are replacing an UTF16 char. Scan string to
484 // check if result can be latin1 encoded.
485 to_is_latin1 = true;
486 for (index = 0; index < length; index++) {
487 jchar c = value->char_at(index);
488 if (c != from_char && !UNICODE::is_latin1(c)) {
489 to_is_latin1 = false;
490 break;
491 }
492 }
493 }
494 }
495
496 // Create new UNICODE (or byte) buffer. Must handlize value because GC
497 // may happen during String and char array creation.
498 typeArrayHandle h_value(THREAD, value);
499 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
500 typeArrayOop from_buffer = h_value();
501 typeArrayOop to_buffer = java_lang_String::value(string());
502
503 // Copy contents
504 for (index = 0; index < length; index++) {
505 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
506 ((jchar) from_buffer->byte_at(index)) & 0xff;
507 if (c == from_char) {
508 c = to_char;
509 }
510 if (!to_is_latin1) {
511 to_buffer->char_at_put(index, c);
512 } else {
513 to_buffer->byte_at_put(index, (jbyte) c);
514 }
515 }
516 return string;
517 }
518
519 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
520 typeArrayOop value = java_lang_String::value(java_string);
521 length = java_lang_String::length(java_string, value);
522 bool is_latin1 = java_lang_String::is_latin1(java_string);
523
524 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
525 if (result != NULL) {
526 if (!is_latin1) {
527 for (int index = 0; index < length; index++) {
528 result[index] = value->char_at(index);
529 }
530 } else {
531 for (int index = 0; index < length; index++) {
532 result[index] = ((jchar) value->byte_at(index)) & 0xff;
533 }
534 }
535 } else {
536 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
537 }
538 return result;
539 }
540
541 unsigned int java_lang_String::hash_code(oop java_string) {
542 // The hash and hashIsZero fields are subject to a benign data race,
543 // making it crucial to ensure that any observable result of the
544 // calculation in this method stays correct under any possible read of
545 // these fields. Necessary restrictions to allow this to be correct
546 // without explicit memory fences or similar concurrency primitives is
547 // that we can ever only write to one of these two fields for a given
548 // String instance, and that the computation is idempotent and derived
549 // from immutable state
550 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized");
551 if (java_lang_String::hash_is_set(java_string)) {
552 return java_string->int_field(hash_offset);
553 }
554
555 typeArrayOop value = java_lang_String::value(java_string);
556 int length = java_lang_String::length(java_string, value);
557 bool is_latin1 = java_lang_String::is_latin1(java_string);
558
559 unsigned int hash = 0;
560 if (length > 0) {
561 if (is_latin1) {
562 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
563 } else {
564 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
565 }
566 }
567
568 if (hash != 0) {
569 java_string->int_field_put(hash_offset, hash);
570 } else {
571 java_string->bool_field_put(hashIsZero_offset, true);
572 }
573 return hash;
574 }
575
576 char* java_lang_String::as_quoted_ascii(oop java_string) {
577 typeArrayOop value = java_lang_String::value(java_string);
578 int length = java_lang_String::length(java_string, value);
579 bool is_latin1 = java_lang_String::is_latin1(java_string);
580
581 if (length == 0) return NULL;
582
583 char* result;
584 int result_length;
585 if (!is_latin1) {
586 jchar* base = value->char_at_addr(0);
587 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
588 result = NEW_RESOURCE_ARRAY(char, result_length);
589 UNICODE::as_quoted_ascii(base, length, result, result_length);
590 } else {
591 jbyte* base = value->byte_at_addr(0);
592 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
593 result = NEW_RESOURCE_ARRAY(char, result_length);
594 UNICODE::as_quoted_ascii(base, length, result, result_length);
595 }
596 assert(result_length >= length + 1, "must not be shorter");
597 assert(result_length == (int)strlen(result) + 1, "must match");
598 return result;
599 }
600
601 Symbol* java_lang_String::as_symbol(oop java_string) {
602 typeArrayOop value = java_lang_String::value(java_string);
603 int length = java_lang_String::length(java_string, value);
604 bool is_latin1 = java_lang_String::is_latin1(java_string);
605 if (!is_latin1) {
606 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
607 Symbol* sym = SymbolTable::new_symbol(base, length);
608 return sym;
609 } else {
610 ResourceMark rm;
611 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
612 const char* base = UNICODE::as_utf8(position, length);
613 Symbol* sym = SymbolTable::new_symbol(base, length);
614 return sym;
615 }
616 }
617
618 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
619 typeArrayOop value = java_lang_String::value(java_string);
620 int length = java_lang_String::length(java_string, value);
621 bool is_latin1 = java_lang_String::is_latin1(java_string);
622 if (!is_latin1) {
623 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
624 return SymbolTable::probe_unicode(base, length);
625 } else {
626 ResourceMark rm;
627 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
628 const char* base = UNICODE::as_utf8(position, length);
629 return SymbolTable::probe(base, length);
630 }
631 }
632
633 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
634 assert(value_equals(value, java_lang_String::value(java_string)),
635 "value must be same as java_lang_String::value(java_string)");
636 int length = java_lang_String::length(java_string, value);
637 if (length == 0) {
638 return 0;
639 }
640 if (!java_lang_String::is_latin1(java_string)) {
641 return UNICODE::utf8_length(value->char_at_addr(0), length);
642 } else {
643 return UNICODE::utf8_length(value->byte_at_addr(0), length);
644 }
645 }
646
647 int java_lang_String::utf8_length(oop java_string) {
648 typeArrayOop value = java_lang_String::value(java_string);
649 return utf8_length(java_string, value);
650 }
651
652 char* java_lang_String::as_utf8_string(oop java_string) {
653 typeArrayOop value = java_lang_String::value(java_string);
654 int length = java_lang_String::length(java_string, value);
655 bool is_latin1 = java_lang_String::is_latin1(java_string);
656 if (!is_latin1) {
657 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
658 return UNICODE::as_utf8(position, length);
659 } else {
660 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
661 return UNICODE::as_utf8(position, length);
662 }
663 }
664
665 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
666 assert(value_equals(value, java_lang_String::value(java_string)),
667 "value must be same as java_lang_String::value(java_string)");
668 int length = java_lang_String::length(java_string, value);
669 bool is_latin1 = java_lang_String::is_latin1(java_string);
670 if (!is_latin1) {
671 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
672 return UNICODE::as_utf8(position, length, buf, buflen);
673 } else {
674 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
675 return UNICODE::as_utf8(position, length, buf, buflen);
676 }
677 }
678
679 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
680 typeArrayOop value = java_lang_String::value(java_string);
681 return as_utf8_string(java_string, value, buf, buflen);
682 }
683
684 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
685 typeArrayOop value = java_lang_String::value(java_string);
686 bool is_latin1 = java_lang_String::is_latin1(java_string);
687 assert(start + len <= java_lang_String::length(java_string), "just checking");
688 if (!is_latin1) {
689 jchar* position = value->char_at_addr(start);
690 return UNICODE::as_utf8(position, len);
691 } else {
692 jbyte* position = value->byte_at_addr(start);
693 return UNICODE::as_utf8(position, len);
694 }
695 }
696
697 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
698 assert(value_equals(value, java_lang_String::value(java_string)),
699 "value must be same as java_lang_String::value(java_string)");
700 assert(start + len <= java_lang_String::length(java_string), "just checking");
701 bool is_latin1 = java_lang_String::is_latin1(java_string);
702 if (!is_latin1) {
703 jchar* position = value->char_at_addr(start);
704 return UNICODE::as_utf8(position, len, buf, buflen);
705 } else {
706 jbyte* position = value->byte_at_addr(start);
707 return UNICODE::as_utf8(position, len, buf, buflen);
708 }
709 }
710
711 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
712 assert(java_string->klass() == SystemDictionary::String_klass(),
713 "must be java_string");
714 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
715 int length = java_lang_String::length(java_string, value);
716 if (length != len) {
717 return false;
718 }
719 bool is_latin1 = java_lang_String::is_latin1(java_string);
720 if (!is_latin1) {
721 for (int i = 0; i < len; i++) {
722 if (value->char_at(i) != chars[i]) {
723 return false;
724 }
725 }
726 } else {
727 for (int i = 0; i < len; i++) {
728 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
729 return false;
730 }
731 }
732 }
733 return true;
734 }
735
736 bool java_lang_String::equals(oop str1, oop str2) {
737 assert(str1->klass() == SystemDictionary::String_klass(),
738 "must be java String");
739 assert(str2->klass() == SystemDictionary::String_klass(),
740 "must be java String");
741 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
742 bool is_latin1 = java_lang_String::is_latin1(str1);
743 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
744 bool is_latin2 = java_lang_String::is_latin1(str2);
745
746 if (is_latin1 != is_latin2) {
747 // Strings with different coders are never equal.
748 return false;
749 }
750 return value_equals(value1, value2);
751 }
752
753 void java_lang_String::print(oop java_string, outputStream* st) {
754 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
755 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
756
757 if (value == NULL) {
758 // This can happen if, e.g., printing a String
759 // object before its initializer has been called
760 st->print("NULL");
761 return;
762 }
763
764 int length = java_lang_String::length(java_string, value);
765 bool is_latin1 = java_lang_String::is_latin1(java_string);
766
767 st->print("\"");
768 for (int index = 0; index < length; index++) {
769 st->print("%c", (!is_latin1) ? value->char_at(index) :
770 ((jchar) value->byte_at(index)) & 0xff );
771 }
772 st->print("\"");
773 }
774
775
776 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
777 assert(mirror.not_null() && fd->is_static(), "just checking");
778 if (fd->has_initial_value()) {
779 BasicType t = fd->field_type();
780 switch (t) {
781 case T_BYTE:
782 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
783 break;
784 case T_BOOLEAN:
785 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
786 break;
787 case T_CHAR:
788 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
789 break;
790 case T_SHORT:
791 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
792 break;
793 case T_INT:
794 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
795 break;
796 case T_FLOAT:
797 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
798 break;
799 case T_DOUBLE:
800 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
801 break;
802 case T_LONG:
803 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
804 break;
805 case T_OBJECT:
806 {
807 assert(fd->signature() == vmSymbols::string_signature(),
808 "just checking");
809 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
810 // Archive the String field and update the pointer.
811 oop s = mirror()->obj_field(fd->offset());
812 oop archived_s = StringTable::create_archived_string(s, CHECK);
813 mirror()->obj_field_put(fd->offset(), archived_s);
814 } else {
815 oop string = fd->string_initial_value(CHECK);
816 mirror()->obj_field_put(fd->offset(), string);
817 }
818 }
819 break;
820 default:
821 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
822 "Illegal ConstantValue attribute in class file");
823 }
824 }
825 }
826
827
828 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
829 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
830
831 // If the offset was read from the shared archive, it was fixed up already
832 if (!k->is_shared()) {
833 if (k->is_instance_klass()) {
834 // During bootstrap, java.lang.Class wasn't loaded so static field
835 // offsets were computed without the size added it. Go back and
836 // update all the static field offsets to included the size.
837 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
838 if (fs.access_flags().is_static()) {
839 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
840 fs.set_offset(real_offset);
841 }
842 }
843 }
844 }
845
846 if (k->is_shared() && k->has_raw_archived_mirror()) {
847 if (HeapShared::open_archive_heap_region_mapped()) {
848 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
849 assert(present, "Missing archived mirror for %s", k->external_name());
850 return;
851 } else {
852 k->set_java_mirror_handle(NULL);
853 k->clear_has_raw_archived_mirror();
854 }
855 }
856 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
857 }
858
859 void java_lang_Class::initialize_mirror_fields(Klass* k,
860 Handle mirror,
861 Handle protection_domain,
862 TRAPS) {
863 // Allocate a simple java object for a lock.
864 // This needs to be a java object because during class initialization
865 // it can be held across a java call.
866 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
867 set_init_lock(mirror(), r);
868
869 // Set protection domain also
870 set_protection_domain(mirror(), protection_domain());
871
872 // Initialize static fields
873 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
874 }
875
876 // Set the java.lang.Module module field in the java_lang_Class mirror
877 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
878 if (module.is_null()) {
879 // During startup, the module may be NULL only if java.base has not been defined yet.
880 // Put the class on the fixup_module_list to patch later when the java.lang.Module
881 // for java.base is known. But note that since we captured the NULL module another
882 // thread may have completed that initialization.
883
884 bool javabase_was_defined = false;
885 {
886 MutexLocker m1(Module_lock, THREAD);
887 // Keep list of classes needing java.base module fixup
888 if (!ModuleEntryTable::javabase_defined()) {
889 assert(k->java_mirror() != NULL, "Class's mirror is null");
890 k->class_loader_data()->inc_keep_alive();
891 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
892 fixup_module_field_list()->push(k);
893 } else {
894 javabase_was_defined = true;
895 }
896 }
897
898 // If java.base was already defined then patch this particular class with java.base.
899 if (javabase_was_defined) {
900 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
901 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
902 "Setting class module field, " JAVA_BASE_NAME " should be defined");
903 Handle javabase_handle(THREAD, javabase_entry->module());
904 set_module(mirror(), javabase_handle());
905 }
906 } else {
907 assert(Universe::is_module_initialized() ||
908 (ModuleEntryTable::javabase_defined() &&
909 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
910 "Incorrect java.lang.Module specification while creating mirror");
911 set_module(mirror(), module());
912 }
913 }
914
915 // Statically allocate fixup lists because they always get created.
916 void java_lang_Class::allocate_fixup_lists() {
917 GrowableArray<Klass*>* mirror_list =
918 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
919 set_fixup_mirror_list(mirror_list);
920
921 GrowableArray<Klass*>* module_list =
922 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
923 set_fixup_module_field_list(module_list);
924 }
925
926 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
927 Handle module, Handle protection_domain, TRAPS) {
928 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
929 assert(k->java_mirror() == NULL, "should only assign mirror once");
930
931 // Use this moment of initialization to cache modifier_flags also,
932 // to support Class.getModifiers(). Instance classes recalculate
933 // the cached flags after the class file is parsed, but before the
934 // class is put into the system dictionary.
935 int computed_modifiers = k->compute_modifier_flags(CHECK);
936 k->set_modifier_flags(computed_modifiers);
937 // Class_klass has to be loaded because it is used to allocate
938 // the mirror.
939 if (SystemDictionary::Class_klass_loaded()) {
940 // Allocate mirror (java.lang.Class instance)
941 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
942 Handle mirror(THREAD, mirror_oop);
943 Handle comp_mirror;
944
945 // Setup indirection from mirror->klass
946 java_lang_Class::set_klass(mirror(), k);
947
948 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
949 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
950
951 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
952
953 // It might also have a component mirror. This mirror must already exist.
954 if (k->is_array_klass()) {
955 if (k->is_valueArray_klass()) {
956 Klass* element_klass = (Klass*) ValueArrayKlass::cast(k)->element_klass();
957 assert(element_klass->is_value(), "Must be value type component");
958 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(element_klass));
959 comp_mirror = Handle(THREAD, vk->value_mirror());
960 } else if (k->is_typeArray_klass()) {
961 BasicType type = TypeArrayKlass::cast(k)->element_type();
962 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
963 } else {
964 assert(k->is_objArray_klass(), "Must be");
965 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
966 assert(element_klass != NULL, "Must have an element klass");
967 if (element_klass->is_value()) {
968 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(element_klass));
969 assert(vk->java_mirror() == vk->value_mirror(), "primary mirror is the value mirror");
970 assert(vk->indirect_mirror() != NULL, "must have an indirect class mirror");
971 comp_mirror = k->name()->is_Q_array_signature() ? Handle(THREAD, vk->value_mirror())
972 : Handle(THREAD, vk->indirect_mirror());
973 } else {
974 comp_mirror = Handle(THREAD, element_klass->java_mirror());
975 }
976 }
977 assert(comp_mirror() != NULL, "must have a mirror");
978
979 // Two-way link between the array klass and its component mirror:
980 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
981 set_component_mirror(mirror(), comp_mirror());
982 // See below for ordering dependencies between field array_klass in component mirror
983 // and java_mirror in this klass.
984 } else {
985 assert(k->is_instance_klass(), "Must be");
986
987 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
988 if (HAS_PENDING_EXCEPTION) {
989 // If any of the fields throws an exception like OOM remove the klass field
990 // from the mirror so GC doesn't follow it after the klass has been deallocated.
991 // This mirror looks like a primitive type, which logically it is because it
992 // it represents no class.
993 java_lang_Class::set_klass(mirror(), NULL);
994 return;
995 }
996 }
997
998 // set the classLoader field in the java_lang_Class instance
999 assert(class_loader() == k->class_loader(), "should be same");
1000 set_class_loader(mirror(), class_loader());
1001
1002 // Setup indirection from klass->mirror
1003 // after any exceptions can happen during allocations.
1004 k->set_java_mirror(mirror);
1005
1006 // Set the module field in the java_lang_Class instance. This must be done
1007 // after the mirror is set.
1008 set_mirror_module_field(k, mirror, module, THREAD);
1009
1010 if (comp_mirror() != NULL) {
1011 // Set after k->java_mirror() is published, because compiled code running
1012 // concurrently doesn't expect a k to have a null java_mirror.
1013 release_set_array_klass(comp_mirror(), k);
1014 }
1015
1016 if (k->is_value()) {
1017 // create the secondary mirror for an inline class
1018 oop indirect_mirror_oop = create_indirect_type_mirror(k, mirror, CHECK);
1019 set_inline_type_mirror(mirror(), mirror());
1020 set_indirect_type_mirror(mirror(), indirect_mirror_oop);
1021 }
1022 } else {
1023 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1024 fixup_mirror_list()->push(k);
1025 }
1026 }
1027
1028 // Create the secondary mirror for inline class. Sets all the fields of this java.lang.Class
1029 // instance with the same value as the primary mirror
1030 oop java_lang_Class::create_indirect_type_mirror(Klass* k, Handle mirror, TRAPS) {
1031 assert(k->is_value(), "inline class");
1032 // Allocate mirror (java.lang.Class instance)
1033 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0);
1034 Handle indirect_mirror(THREAD, mirror_oop);
1035
1036 java_lang_Class::set_klass(indirect_mirror(), k);
1037 java_lang_Class::set_static_oop_field_count(indirect_mirror(), static_oop_field_count(mirror()));
1038 // ## do we need to set init lock?
1039 java_lang_Class::set_init_lock(indirect_mirror(), init_lock(mirror()));
1040
1041 set_protection_domain(indirect_mirror(), protection_domain(mirror()));
1042 set_class_loader(indirect_mirror(), class_loader(mirror()));
1043 // ## handle if java.base is not yet defined
1044 set_module(indirect_mirror(), module(mirror()));
1045 set_inline_type_mirror(indirect_mirror(), mirror());
1046 set_indirect_type_mirror(indirect_mirror(), indirect_mirror());
1047 return indirect_mirror();
1048 }
1049
1050 #if INCLUDE_CDS_JAVA_HEAP
1051 // Clears mirror fields. Static final fields with initial values are reloaded
1052 // from constant pool. The object identity hash is in the object header and is
1053 // not affected.
1054 class ResetMirrorField: public FieldClosure {
1055 private:
1056 Handle _m;
1057
1058 public:
1059 ResetMirrorField(Handle mirror) : _m(mirror) {}
1060
1061 void do_field(fieldDescriptor* fd) {
1062 assert(DumpSharedSpaces, "dump time only");
1063 assert(_m.not_null(), "Mirror cannot be NULL");
1064
1065 if (fd->is_static() && fd->has_initial_value()) {
1066 initialize_static_field(fd, _m, Thread::current());
1067 return;
1068 }
1069
1070 BasicType ft = fd->field_type();
1071 switch (ft) {
1072 case T_BYTE:
1073 _m()->byte_field_put(fd->offset(), 0);
1074 break;
1075 case T_CHAR:
1076 _m()->char_field_put(fd->offset(), 0);
1077 break;
1078 case T_DOUBLE:
1079 _m()->double_field_put(fd->offset(), 0);
1080 break;
1081 case T_FLOAT:
1082 _m()->float_field_put(fd->offset(), 0);
1083 break;
1084 case T_INT:
1085 _m()->int_field_put(fd->offset(), 0);
1086 break;
1087 case T_LONG:
1088 _m()->long_field_put(fd->offset(), 0);
1089 break;
1090 case T_SHORT:
1091 _m()->short_field_put(fd->offset(), 0);
1092 break;
1093 case T_BOOLEAN:
1094 _m()->bool_field_put(fd->offset(), false);
1095 break;
1096 case T_ARRAY:
1097 case T_OBJECT: {
1098 // It might be useful to cache the String field, but
1099 // for now just clear out any reference field
1100 oop o = _m()->obj_field(fd->offset());
1101 _m()->obj_field_put(fd->offset(), NULL);
1102 break;
1103 }
1104 default:
1105 ShouldNotReachHere();
1106 break;
1107 }
1108 }
1109 };
1110
1111 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1112 assert(HeapShared::is_heap_object_archiving_allowed(),
1113 "HeapShared::is_heap_object_archiving_allowed() must be true");
1114
1115 for (int t = 0; t <= T_VOID; t++) {
1116 oop m = Universe::_mirrors[t];
1117 if (m != NULL) {
1118 // Update the field at _array_klass_offset to point to the relocated array klass.
1119 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1120 assert(archived_m != NULL, "sanity");
1121 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1122 assert(ak != NULL || t == T_VOID, "should not be NULL");
1123 if (ak != NULL) {
1124 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak, true);
1125 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1126 }
1127
1128 // Clear the fields. Just to be safe
1129 Klass *k = m->klass();
1130 Handle archived_mirror_h(THREAD, archived_m);
1131 ResetMirrorField reset(archived_mirror_h);
1132 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1133
1134 log_trace(cds, heap, mirror)(
1135 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1136 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1137
1138 Universe::_mirrors[t] = archived_m;
1139 }
1140 }
1141
1142 assert(Universe::_mirrors[T_INT] != NULL &&
1143 Universe::_mirrors[T_FLOAT] != NULL &&
1144 Universe::_mirrors[T_DOUBLE] != NULL &&
1145 Universe::_mirrors[T_BYTE] != NULL &&
1146 Universe::_mirrors[T_BOOLEAN] != NULL &&
1147 Universe::_mirrors[T_CHAR] != NULL &&
1148 Universe::_mirrors[T_LONG] != NULL &&
1149 Universe::_mirrors[T_SHORT] != NULL &&
1150 Universe::_mirrors[T_VOID] != NULL, "sanity");
1151
1152 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1153 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1154 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1155 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1156 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1157 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1158 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1159 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1160 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1161 }
1162
1163 //
1164 // After the mirror object is successfully archived, the archived
1165 // klass is set with _has_archived_raw_mirror flag.
1166 //
1167 // The _has_archived_raw_mirror flag is cleared at runtime when the
1168 // archived mirror is restored. If archived java heap data cannot
1169 // be used at runtime, new mirror object is created for the shared
1170 // class. The _has_archived_raw_mirror is cleared also during the process.
1171 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1172 assert(HeapShared::is_heap_object_archiving_allowed(),
1173 "HeapShared::is_heap_object_archiving_allowed() must be true");
1174
1175 // Mirror is already archived
1176 if (k->has_raw_archived_mirror()) {
1177 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1178 return k->archived_java_mirror_raw();
1179 }
1180
1181 // No mirror
1182 oop mirror = k->java_mirror();
1183 if (mirror == NULL) {
1184 return NULL;
1185 }
1186
1187 if (k->is_instance_klass()) {
1188 InstanceKlass *ik = InstanceKlass::cast(k);
1189 assert(ik->signers() == NULL, "class with signer should have been excluded");
1190
1191 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1192 ik->is_shared_app_class())) {
1193 // Archiving mirror for classes from non-builtin loaders is not
1194 // supported. Clear the _java_mirror within the archived class.
1195 k->set_java_mirror_handle(NULL);
1196 return NULL;
1197 }
1198 }
1199
1200 // Now start archiving the mirror object
1201 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1202 if (archived_mirror == NULL) {
1203 return NULL;
1204 }
1205
1206 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1207 if (archived_mirror == NULL) {
1208 return NULL;
1209 }
1210
1211 k->set_archived_java_mirror_raw(archived_mirror);
1212
1213 k->set_has_raw_archived_mirror();
1214
1215 ResourceMark rm;
1216 log_trace(cds, heap, mirror)(
1217 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1218 k->external_name(), p2i(mirror), p2i(archived_mirror));
1219
1220 return archived_mirror;
1221 }
1222
1223 // The process is based on create_mirror().
1224 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1225 oop archived_mirror,
1226 Thread *THREAD) {
1227 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1228 // to archived metadata and objects below.
1229 Klass *c = archived_mirror->klass();
1230 Handle archived_mirror_h(THREAD, archived_mirror);
1231 ResetMirrorField reset(archived_mirror_h);
1232 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1233
1234 if (k->is_array_klass()) {
1235 oop archived_comp_mirror;
1236 if (k->is_typeArray_klass()) {
1237 // The primitive type mirrors are already archived. Get the archived mirror.
1238 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1239 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1240 assert(archived_comp_mirror != NULL, "Must be");
1241 } else {
1242 assert(k->is_objArray_klass(), "Must be");
1243 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1244 assert(element_klass != NULL, "Must have an element klass");
1245 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1246 if (archived_comp_mirror == NULL) {
1247 return NULL;
1248 }
1249 }
1250 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1251 } else {
1252 assert(k->is_instance_klass(), "Must be");
1253
1254 // Reset local static fields in the mirror
1255 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1256
1257 java_lang_Class:set_init_lock(archived_mirror, NULL);
1258
1259 set_protection_domain(archived_mirror, NULL);
1260 }
1261
1262 // clear class loader and mirror_module_field
1263 set_class_loader(archived_mirror, NULL);
1264 set_module(archived_mirror, NULL);
1265
1266 // The archived mirror's field at _klass_offset is still pointing to the original
1267 // klass. Updated the field in the archived mirror to point to the relocated
1268 // klass in the archive.
1269 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror), true);
1270 log_debug(cds, heap, mirror)(
1271 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1272 p2i(as_Klass(mirror)), p2i(reloc_k));
1273 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1274
1275 // The field at _array_klass_offset is pointing to the original one dimension
1276 // higher array klass if exists. Relocate the pointer.
1277 Klass *arr = array_klass_acquire(mirror);
1278 if (arr != NULL) {
1279 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr, true);
1280 log_debug(cds, heap, mirror)(
1281 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1282 p2i(arr), p2i(reloc_arr));
1283 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1284 }
1285 return archived_mirror;
1286 }
1287
1288 void java_lang_Class::update_archived_primitive_mirror_native_pointers(oop archived_mirror) {
1289 if (MetaspaceShared::relocation_delta() != 0) {
1290 assert(archived_mirror->metadata_field(_klass_offset) == NULL, "must be for primitive class");
1291
1292 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset));
1293 if (ak != NULL) {
1294 archived_mirror->metadata_field_put(_array_klass_offset,
1295 (Klass*)(address(ak) + MetaspaceShared::relocation_delta()));
1296 }
1297 }
1298 }
1299
1300 void java_lang_Class::update_archived_mirror_native_pointers(oop archived_mirror) {
1301 if (MetaspaceShared::relocation_delta() != 0) {
1302 Klass* k = ((Klass*)archived_mirror->metadata_field(_klass_offset));
1303 archived_mirror->metadata_field_put(_klass_offset,
1304 (Klass*)(address(k) + MetaspaceShared::relocation_delta()));
1305
1306 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset));
1307 if (ak != NULL) {
1308 archived_mirror->metadata_field_put(_array_klass_offset,
1309 (Klass*)(address(ak) + MetaspaceShared::relocation_delta()));
1310 }
1311 }
1312 }
1313
1314
1315 // Returns true if the mirror is updated, false if no archived mirror
1316 // data is present. After the archived mirror object is restored, the
1317 // shared klass' _has_raw_archived_mirror flag is cleared.
1318 bool java_lang_Class::restore_archived_mirror(Klass *k,
1319 Handle class_loader, Handle module,
1320 Handle protection_domain, TRAPS) {
1321 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1322 // see more details in SystemDictionary::resolve_well_known_classes().
1323 if (!SystemDictionary::Class_klass_loaded()) {
1324 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1325 fixup_mirror_list()->push(k);
1326 return true;
1327 }
1328
1329 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1330 if (m == NULL) {
1331 return false;
1332 }
1333
1334 // mirror is archived, restore
1335 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1336 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1337 update_archived_mirror_native_pointers(m);
1338 assert(as_Klass(m) == k, "must be");
1339 Handle mirror(THREAD, m);
1340
1341 if (!k->is_array_klass()) {
1342 // - local static final fields with initial values were initialized at dump time
1343
1344 // create the init_lock
1345 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1346 set_init_lock(mirror(), r);
1347
1348 if (protection_domain.not_null()) {
1349 set_protection_domain(mirror(), protection_domain());
1350 }
1351 }
1352
1353 assert(class_loader() == k->class_loader(), "should be same");
1354 if (class_loader.not_null()) {
1355 set_class_loader(mirror(), class_loader());
1356 }
1357
1358 k->set_java_mirror(mirror);
1359 k->clear_has_raw_archived_mirror();
1360
1361 set_mirror_module_field(k, mirror, module, THREAD);
1362
1363 ResourceMark rm;
1364 log_trace(cds, heap, mirror)(
1365 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1366
1367 return true;
1368 }
1369 #endif // INCLUDE_CDS_JAVA_HEAP
1370
1371 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1372 assert(_module_offset != 0, "must have been computed already");
1373 java_lang_Class::set_module(k->java_mirror(), module());
1374 }
1375
1376 int java_lang_Class::oop_size(oop java_class) {
1377 assert(_oop_size_offset != 0, "must be set");
1378 int size = java_class->int_field(_oop_size_offset);
1379 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1380 return size;
1381 }
1382
1383
1384 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1385 assert(_oop_size_offset != 0, "must be set");
1386 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1387 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1388 }
1389
1390 int java_lang_Class::static_oop_field_count(oop java_class) {
1391 assert(_static_oop_field_count_offset != 0, "must be set");
1392 return java_class->int_field(_static_oop_field_count_offset);
1393 }
1394
1395 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1396 assert(_static_oop_field_count_offset != 0, "must be set");
1397 return java_class->int_field_raw(_static_oop_field_count_offset);
1398 }
1399
1400 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1401 assert(_static_oop_field_count_offset != 0, "must be set");
1402 java_class->int_field_put(_static_oop_field_count_offset, size);
1403 }
1404
1405 oop java_lang_Class::protection_domain(oop java_class) {
1406 assert(_protection_domain_offset != 0, "must be set");
1407 return java_class->obj_field(_protection_domain_offset);
1408 }
1409 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1410 assert(_protection_domain_offset != 0, "must be set");
1411 java_class->obj_field_put(_protection_domain_offset, pd);
1412 }
1413
1414 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1415 assert(_component_mirror_offset != 0, "must be set");
1416 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1417 }
1418 oop java_lang_Class::component_mirror(oop java_class) {
1419 assert(_component_mirror_offset != 0, "must be set");
1420 return java_class->obj_field(_component_mirror_offset);
1421 }
1422
1423 oop java_lang_Class::init_lock(oop java_class) {
1424 assert(_init_lock_offset != 0, "must be set");
1425 return java_class->obj_field(_init_lock_offset);
1426 }
1427 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1428 assert(_init_lock_offset != 0, "must be set");
1429 java_class->obj_field_put(_init_lock_offset, init_lock);
1430 }
1431
1432 objArrayOop java_lang_Class::signers(oop java_class) {
1433 assert(_signers_offset != 0, "must be set");
1434 return (objArrayOop)java_class->obj_field(_signers_offset);
1435 }
1436 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1437 assert(_signers_offset != 0, "must be set");
1438 java_class->obj_field_put(_signers_offset, (oop)signers);
1439 }
1440
1441
1442 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1443 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1444 if (_class_loader_offset != 0) {
1445 java_class->obj_field_put(_class_loader_offset, loader);
1446 }
1447 }
1448
1449 oop java_lang_Class::class_loader(oop java_class) {
1450 assert(_class_loader_offset != 0, "must be set");
1451 return java_class->obj_field(_class_loader_offset);
1452 }
1453
1454 oop java_lang_Class::module(oop java_class) {
1455 assert(_module_offset != 0, "must be set");
1456 return java_class->obj_field(_module_offset);
1457 }
1458
1459 void java_lang_Class::set_module(oop java_class, oop module) {
1460 assert(_module_offset != 0, "must be set");
1461 java_class->obj_field_put(_module_offset, module);
1462 }
1463
1464 oop java_lang_Class::name(Handle java_class, TRAPS) {
1465 assert(_name_offset != 0, "must be set");
1466 oop o = java_class->obj_field(_name_offset);
1467 if (o == NULL) {
1468 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1469 java_class->obj_field_put(_name_offset, o);
1470 }
1471 return o;
1472 }
1473
1474 oop java_lang_Class::source_file(oop java_class) {
1475 assert(_source_file_offset != 0, "must be set");
1476 return java_class->obj_field(_source_file_offset);
1477 }
1478
1479 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1480 assert(_source_file_offset != 0, "must be set");
1481 java_class->obj_field_put(_source_file_offset, source_file);
1482 }
1483
1484 oop java_lang_Class::inline_type_mirror(oop java_class) {
1485 assert(_inline_mirror_offset != 0, "must be set");
1486 return java_class->obj_field(_inline_mirror_offset);
1487 }
1488
1489 void java_lang_Class::set_inline_type_mirror(oop java_class, oop mirror) {
1490 assert(_inline_mirror_offset != 0, "must be set");
1491 java_class->obj_field_put(_inline_mirror_offset, mirror);
1492 }
1493
1494 oop java_lang_Class::indirect_type_mirror(oop java_class) {
1495 assert(_indirect_mirror_offset != 0, "must be set");
1496 return java_class->obj_field(_indirect_mirror_offset);
1497 }
1498
1499 void java_lang_Class::set_indirect_type_mirror(oop java_class, oop mirror) {
1500 assert(_indirect_mirror_offset != 0, "must be set");
1501 java_class->obj_field_put(_indirect_mirror_offset, mirror);
1502 }
1503
1504 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1505 // This should be improved by adding a field at the Java level or by
1506 // introducing a new VM klass (see comment in ClassFileParser)
1507 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1508 if (type != T_VOID) {
1509 Klass* aklass = Universe::typeArrayKlassObj(type);
1510 assert(aklass != NULL, "correct bootstrap");
1511 release_set_array_klass(java_class, aklass);
1512 }
1513 #ifdef ASSERT
1514 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1515 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1516 #endif
1517 return java_class;
1518 }
1519
1520
1521 Klass* java_lang_Class::as_Klass(oop java_class) {
1522 //%note memory_2
1523 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1524 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1525 assert(k == NULL || k->is_klass(), "type check");
1526 return k;
1527 }
1528
1529 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1530 //%note memory_2
1531 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1532 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1533 assert(k == NULL || k->is_klass(), "type check");
1534 return k;
1535 }
1536
1537
1538 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1539 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1540 java_class->metadata_field_put(_klass_offset, klass);
1541 }
1542
1543
1544 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1545 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1546 Symbol* name = NULL;
1547 bool is_instance = false;
1548 bool is_value = false;
1549 if (is_primitive(java_class)) {
1550 name = vmSymbols::type_signature(primitive_type(java_class));
1551 } else {
1552 Klass* k = as_Klass(java_class);
1553 is_instance = k->is_instance_klass();
1554 is_value = k->is_value();
1555 name = k->name();
1556 }
1557 if (name == NULL) {
1558 st->print("<null>");
1559 return;
1560 }
1561 if (is_instance) {
1562 if (is_value && (java_class == inline_type_mirror(java_class))) {
1563 st->print("Q");
1564 } else {
1565 st->print("L");
1566 }
1567 }
1568 st->write((char*) name->base(), (int) name->utf8_length());
1569 if (is_instance) st->print(";");
1570 }
1571
1572 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1573 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1574 Symbol* name;
1575 if (is_primitive(java_class)) {
1576 name = vmSymbols::type_signature(primitive_type(java_class));
1577 // Because this can create a new symbol, the caller has to decrement
1578 // the refcount, so make adjustment here and below for symbols returned
1579 // that are not created or incremented due to a successful lookup.
1580 name->increment_refcount();
1581 } else {
1582 Klass* k = as_Klass(java_class);
1583 if (!k->is_instance_klass()) {
1584 name = k->name();
1585 name->increment_refcount();
1586 } else {
1587 ResourceMark rm;
1588 const char* sigstr;
1589 if (k->is_value()) {
1590 char c = (java_class == inline_type_mirror(java_class)) ?
1591 JVM_SIGNATURE_VALUETYPE : JVM_SIGNATURE_CLASS;
1592 sigstr = InstanceKlass::cast(k)->signature_name_of(c);
1593 } else {
1594 sigstr = k->signature_name();
1595 }
1596 int siglen = (int) strlen(sigstr);
1597 if (!intern_if_not_found) {
1598 name = SymbolTable::probe(sigstr, siglen);
1599 } else {
1600 name = SymbolTable::new_symbol(sigstr, siglen);
1601 }
1602 }
1603 }
1604 return name;
1605 }
1606
1607 // Returns the Java name for this Java mirror (Resource allocated)
1608 // See Klass::external_name().
1609 // For primitive type Java mirrors, its type name is returned.
1610 const char* java_lang_Class::as_external_name(oop java_class) {
1611 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1612 const char* name = NULL;
1613 if (is_primitive(java_class)) {
1614 name = type2name(primitive_type(java_class));
1615 } else {
1616 name = as_Klass(java_class)->external_name();
1617 }
1618 if (name == NULL) {
1619 name = "<null>";
1620 }
1621 return name;
1622 }
1623
1624 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1625 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1626 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1627 return k;
1628 }
1629
1630
1631 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1632 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1633 java_class->release_metadata_field_put(_array_klass_offset, klass);
1634 }
1635
1636
1637 BasicType java_lang_Class::primitive_type(oop java_class) {
1638 assert(java_lang_Class::is_primitive(java_class), "just checking");
1639 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1640 BasicType type = T_VOID;
1641 if (ak != NULL) {
1642 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1643 type = ArrayKlass::cast(ak)->element_type();
1644 } else {
1645 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1646 }
1647 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1648 return type;
1649 }
1650
1651 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1652 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1653 if (is_primitive(java_class)) {
1654 if (reference_klass != NULL)
1655 (*reference_klass) = NULL;
1656 return primitive_type(java_class);
1657 } else {
1658 if (reference_klass != NULL)
1659 (*reference_klass) = as_Klass(java_class);
1660 return T_OBJECT;
1661 }
1662 }
1663
1664
1665 oop java_lang_Class::primitive_mirror(BasicType t) {
1666 oop mirror = Universe::java_mirror(t);
1667 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1668 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1669 return mirror;
1670 }
1671
1672 bool java_lang_Class::offsets_computed = false;
1673 int java_lang_Class::classRedefinedCount_offset = -1;
1674
1675 #define CLASS_FIELDS_DO(macro) \
1676 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1677 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1678 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1679 macro(_module_offset, k, "module", module_signature, false); \
1680 macro(_name_offset, k, "name", string_signature, false); \
1681 macro(_inline_mirror_offset, k, "inlineType", class_signature, false); \
1682 macro(_indirect_mirror_offset, k, "indirectType", class_signature, false); \
1683
1684 void java_lang_Class::compute_offsets() {
1685 if (offsets_computed) {
1686 return;
1687 }
1688
1689 offsets_computed = true;
1690
1691 InstanceKlass* k = SystemDictionary::Class_klass();
1692 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1693
1694 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1695 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1696 // GC treats them the same.
1697 _init_lock_offset = _component_mirror_offset;
1698
1699 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1700 }
1701
1702 #if INCLUDE_CDS
1703 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1704 f->do_bool(&offsets_computed);
1705 f->do_u4((u4*)&_init_lock_offset);
1706
1707 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1708
1709 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1710 }
1711 #endif
1712
1713 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1714 if (classRedefinedCount_offset == -1) {
1715 // If we don't have an offset for it then just return -1 as a marker.
1716 return -1;
1717 }
1718
1719 return the_class_mirror->int_field(classRedefinedCount_offset);
1720 }
1721
1722 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1723 if (classRedefinedCount_offset == -1) {
1724 // If we don't have an offset for it then nothing to set.
1725 return;
1726 }
1727
1728 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1729 }
1730
1731
1732 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1733 // platform thread structure, and a eetop offset which was used for thread
1734 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1735 // merged, so in the HotSpot VM we just use the eetop field for the thread
1736 // instead of the privateInfo_offset.
1737 //
1738 // Note: The stackSize field is only present starting in 1.4.
1739
1740 int java_lang_Thread::_name_offset = 0;
1741 int java_lang_Thread::_group_offset = 0;
1742 int java_lang_Thread::_contextClassLoader_offset = 0;
1743 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1744 int java_lang_Thread::_priority_offset = 0;
1745 int java_lang_Thread::_eetop_offset = 0;
1746 int java_lang_Thread::_interrupted_offset = 0;
1747 int java_lang_Thread::_daemon_offset = 0;
1748 int java_lang_Thread::_stillborn_offset = 0;
1749 int java_lang_Thread::_stackSize_offset = 0;
1750 int java_lang_Thread::_tid_offset = 0;
1751 int java_lang_Thread::_thread_status_offset = 0;
1752 int java_lang_Thread::_park_blocker_offset = 0;
1753
1754 #define THREAD_FIELDS_DO(macro) \
1755 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1756 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1757 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1758 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1759 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1760 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1761 macro(_eetop_offset, k, "eetop", long_signature, false); \
1762 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1763 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1764 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1765 macro(_tid_offset, k, "tid", long_signature, false); \
1766 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1767 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false)
1768
1769 void java_lang_Thread::compute_offsets() {
1770 assert(_group_offset == 0, "offsets should be initialized only once");
1771
1772 InstanceKlass* k = SystemDictionary::Thread_klass();
1773 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1774 }
1775
1776 #if INCLUDE_CDS
1777 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1778 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1779 }
1780 #endif
1781
1782 JavaThread* java_lang_Thread::thread(oop java_thread) {
1783 return (JavaThread*)java_thread->address_field(_eetop_offset);
1784 }
1785
1786
1787 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1788 java_thread->address_field_put(_eetop_offset, (address)thread);
1789 }
1790
1791 bool java_lang_Thread::interrupted(oop java_thread) {
1792 // Make sure the caller can safely access oops.
1793 assert(Thread::current()->is_VM_thread() ||
1794 (JavaThread::current()->thread_state() != _thread_blocked &&
1795 JavaThread::current()->thread_state() != _thread_in_native),
1796 "Unsafe access to oop");
1797 return java_thread->bool_field_volatile(_interrupted_offset);
1798 }
1799
1800 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1801 // Make sure the caller can safely access oops.
1802 assert(Thread::current()->is_VM_thread() ||
1803 (JavaThread::current()->thread_state() != _thread_blocked &&
1804 JavaThread::current()->thread_state() != _thread_in_native),
1805 "Unsafe access to oop");
1806 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1807 }
1808
1809
1810 oop java_lang_Thread::name(oop java_thread) {
1811 return java_thread->obj_field(_name_offset);
1812 }
1813
1814
1815 void java_lang_Thread::set_name(oop java_thread, oop name) {
1816 java_thread->obj_field_put(_name_offset, name);
1817 }
1818
1819
1820 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1821 return (ThreadPriority)java_thread->int_field(_priority_offset);
1822 }
1823
1824
1825 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1826 java_thread->int_field_put(_priority_offset, priority);
1827 }
1828
1829
1830 oop java_lang_Thread::threadGroup(oop java_thread) {
1831 return java_thread->obj_field(_group_offset);
1832 }
1833
1834
1835 bool java_lang_Thread::is_stillborn(oop java_thread) {
1836 return java_thread->bool_field(_stillborn_offset) != 0;
1837 }
1838
1839
1840 // We never have reason to turn the stillborn bit off
1841 void java_lang_Thread::set_stillborn(oop java_thread) {
1842 java_thread->bool_field_put(_stillborn_offset, true);
1843 }
1844
1845
1846 bool java_lang_Thread::is_alive(oop java_thread) {
1847 JavaThread* thr = java_lang_Thread::thread(java_thread);
1848 return (thr != NULL);
1849 }
1850
1851
1852 bool java_lang_Thread::is_daemon(oop java_thread) {
1853 return java_thread->bool_field(_daemon_offset) != 0;
1854 }
1855
1856
1857 void java_lang_Thread::set_daemon(oop java_thread) {
1858 java_thread->bool_field_put(_daemon_offset, true);
1859 }
1860
1861 oop java_lang_Thread::context_class_loader(oop java_thread) {
1862 return java_thread->obj_field(_contextClassLoader_offset);
1863 }
1864
1865 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1866 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1867 }
1868
1869
1870 jlong java_lang_Thread::stackSize(oop java_thread) {
1871 return java_thread->long_field(_stackSize_offset);
1872 }
1873
1874 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1875 void java_lang_Thread::set_thread_status(oop java_thread,
1876 java_lang_Thread::ThreadStatus status) {
1877 java_thread->int_field_put(_thread_status_offset, status);
1878 }
1879
1880 // Read thread status value from threadStatus field in java.lang.Thread java class.
1881 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1882 // Make sure the caller is operating on behalf of the VM or is
1883 // running VM code (state == _thread_in_vm).
1884 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1885 JavaThread::current()->thread_state() == _thread_in_vm,
1886 "Java Thread is not running in vm");
1887 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1888 }
1889
1890
1891 jlong java_lang_Thread::thread_id(oop java_thread) {
1892 return java_thread->long_field(_tid_offset);
1893 }
1894
1895 oop java_lang_Thread::park_blocker(oop java_thread) {
1896 return java_thread->obj_field(_park_blocker_offset);
1897 }
1898
1899 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1900 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1901 switch (status) {
1902 case NEW : return "NEW";
1903 case RUNNABLE : return "RUNNABLE";
1904 case SLEEPING : return "TIMED_WAITING (sleeping)";
1905 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1906 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1907 case PARKED : return "WAITING (parking)";
1908 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1909 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1910 case TERMINATED : return "TERMINATED";
1911 default : return "UNKNOWN";
1912 };
1913 }
1914 int java_lang_ThreadGroup::_parent_offset = 0;
1915 int java_lang_ThreadGroup::_name_offset = 0;
1916 int java_lang_ThreadGroup::_threads_offset = 0;
1917 int java_lang_ThreadGroup::_groups_offset = 0;
1918 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1919 int java_lang_ThreadGroup::_destroyed_offset = 0;
1920 int java_lang_ThreadGroup::_daemon_offset = 0;
1921 int java_lang_ThreadGroup::_nthreads_offset = 0;
1922 int java_lang_ThreadGroup::_ngroups_offset = 0;
1923
1924 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1925 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1926 return java_thread_group->obj_field(_parent_offset);
1927 }
1928
1929 // ("name as oop" accessor is not necessary)
1930
1931 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1932 oop name = java_thread_group->obj_field(_name_offset);
1933 // ThreadGroup.name can be null
1934 if (name != NULL) {
1935 return java_lang_String::as_utf8_string(name);
1936 }
1937 return NULL;
1938 }
1939
1940 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1941 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1942 return java_thread_group->int_field(_nthreads_offset);
1943 }
1944
1945 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1946 oop threads = java_thread_group->obj_field(_threads_offset);
1947 assert(threads != NULL, "threadgroups should have threads");
1948 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1949 return objArrayOop(threads);
1950 }
1951
1952 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1953 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1954 return java_thread_group->int_field(_ngroups_offset);
1955 }
1956
1957 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1958 oop groups = java_thread_group->obj_field(_groups_offset);
1959 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1960 return objArrayOop(groups);
1961 }
1962
1963 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1964 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1965 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1966 }
1967
1968 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1969 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1970 return java_thread_group->bool_field(_destroyed_offset) != 0;
1971 }
1972
1973 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1974 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1975 return java_thread_group->bool_field(_daemon_offset) != 0;
1976 }
1977
1978 #define THREADGROUP_FIELDS_DO(macro) \
1979 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1980 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1981 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1982 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1983 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1984 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1985 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1986 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1987 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1988
1989 void java_lang_ThreadGroup::compute_offsets() {
1990 assert(_parent_offset == 0, "offsets should be initialized only once");
1991
1992 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1993 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1994 }
1995
1996 #if INCLUDE_CDS
1997 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1998 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1999 }
2000 #endif
2001
2002 #define THROWABLE_FIELDS_DO(macro) \
2003 macro(backtrace_offset, k, "backtrace", object_signature, false); \
2004 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
2005 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2006 macro(depth_offset, k, "depth", int_signature, false); \
2007 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2008
2009 void java_lang_Throwable::compute_offsets() {
2010 InstanceKlass* k = SystemDictionary::Throwable_klass();
2011 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2012 }
2013
2014 #if INCLUDE_CDS
2015 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2016 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2017 }
2018 #endif
2019
2020 oop java_lang_Throwable::unassigned_stacktrace() {
2021 InstanceKlass* ik = SystemDictionary::Throwable_klass();
2022 oop base = ik->static_field_base_raw();
2023 return base->obj_field(static_unassigned_stacktrace_offset);
2024 }
2025
2026 oop java_lang_Throwable::backtrace(oop throwable) {
2027 return throwable->obj_field_acquire(backtrace_offset);
2028 }
2029
2030
2031 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2032 throwable->release_obj_field_put(backtrace_offset, value);
2033 }
2034
2035 int java_lang_Throwable::depth(oop throwable) {
2036 return throwable->int_field(depth_offset);
2037 }
2038
2039 void java_lang_Throwable::set_depth(oop throwable, int value) {
2040 throwable->int_field_put(depth_offset, value);
2041 }
2042
2043 oop java_lang_Throwable::message(oop throwable) {
2044 return throwable->obj_field(detailMessage_offset);
2045 }
2046
2047
2048 // Return Symbol for detailed_message or NULL
2049 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2050 PRESERVE_EXCEPTION_MARK; // Keep original exception
2051 oop detailed_message = java_lang_Throwable::message(throwable);
2052 if (detailed_message != NULL) {
2053 return java_lang_String::as_symbol(detailed_message);
2054 }
2055 return NULL;
2056 }
2057
2058 void java_lang_Throwable::set_message(oop throwable, oop value) {
2059 throwable->obj_field_put(detailMessage_offset, value);
2060 }
2061
2062
2063 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2064 throwable->obj_field_put(stackTrace_offset, st_element_array);
2065 }
2066
2067 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2068 set_stacktrace(throwable, NULL);
2069 }
2070
2071
2072 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2073 ResourceMark rm;
2074 Klass* k = throwable->klass();
2075 assert(k != NULL, "just checking");
2076 st->print("%s", k->external_name());
2077 oop msg = message(throwable);
2078 if (msg != NULL) {
2079 st->print(": %s", java_lang_String::as_utf8_string(msg));
2080 }
2081 }
2082
2083 // After this many redefines, the stack trace is unreliable.
2084 const int MAX_VERSION = USHRT_MAX;
2085
2086 static inline bool version_matches(Method* method, int version) {
2087 assert(version < MAX_VERSION, "version is too big");
2088 return method != NULL && (method->constants()->version() == version);
2089 }
2090
2091 // This class provides a simple wrapper over the internal structure of
2092 // exception backtrace to insulate users of the backtrace from needing
2093 // to know what it looks like.
2094 // The code of this class is not GC safe. Allocations can only happen
2095 // in expand().
2096 class BacktraceBuilder: public StackObj {
2097 friend class BacktraceIterator;
2098 private:
2099 Handle _backtrace;
2100 objArrayOop _head;
2101 typeArrayOop _methods;
2102 typeArrayOop _bcis;
2103 objArrayOop _mirrors;
2104 typeArrayOop _names; // Needed to insulate method name against redefinition.
2105 // This is set to a java.lang.Boolean(true) if the top frame
2106 // of the backtrace is omitted because it shall be hidden.
2107 // Else it is null.
2108 oop _has_hidden_top_frame;
2109 int _index;
2110 NoSafepointVerifier _nsv;
2111
2112 enum {
2113 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2114 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2115 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2116 trace_names_offset = java_lang_Throwable::trace_names_offset,
2117 trace_next_offset = java_lang_Throwable::trace_next_offset,
2118 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2119 trace_size = java_lang_Throwable::trace_size,
2120 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2121 };
2122
2123 // get info out of chunks
2124 static typeArrayOop get_methods(objArrayHandle chunk) {
2125 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2126 assert(methods != NULL, "method array should be initialized in backtrace");
2127 return methods;
2128 }
2129 static typeArrayOop get_bcis(objArrayHandle chunk) {
2130 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2131 assert(bcis != NULL, "bci array should be initialized in backtrace");
2132 return bcis;
2133 }
2134 static objArrayOop get_mirrors(objArrayHandle chunk) {
2135 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2136 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2137 return mirrors;
2138 }
2139 static typeArrayOop get_names(objArrayHandle chunk) {
2140 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2141 assert(names != NULL, "names array should be initialized in backtrace");
2142 return names;
2143 }
2144 static oop get_has_hidden_top_frame(objArrayHandle chunk) {
2145 oop hidden = chunk->obj_at(trace_hidden_offset);
2146 return hidden;
2147 }
2148
2149 public:
2150
2151 // constructor for new backtrace
2152 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL), _has_hidden_top_frame(NULL) {
2153 expand(CHECK);
2154 _backtrace = Handle(THREAD, _head);
2155 _index = 0;
2156 }
2157
2158 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2159 _methods = get_methods(backtrace);
2160 _bcis = get_bcis(backtrace);
2161 _mirrors = get_mirrors(backtrace);
2162 _names = get_names(backtrace);
2163 _has_hidden_top_frame = get_has_hidden_top_frame(backtrace);
2164 assert(_methods->length() == _bcis->length() &&
2165 _methods->length() == _mirrors->length() &&
2166 _mirrors->length() == _names->length(),
2167 "method and source information arrays should match");
2168
2169 // head is the preallocated backtrace
2170 _head = backtrace();
2171 _backtrace = Handle(thread, _head);
2172 _index = 0;
2173 }
2174
2175 void expand(TRAPS) {
2176 objArrayHandle old_head(THREAD, _head);
2177 PauseNoSafepointVerifier pnsv(&_nsv);
2178
2179 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2180 objArrayHandle new_head(THREAD, head);
2181
2182 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2183 typeArrayHandle new_methods(THREAD, methods);
2184
2185 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2186 typeArrayHandle new_bcis(THREAD, bcis);
2187
2188 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2189 objArrayHandle new_mirrors(THREAD, mirrors);
2190
2191 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2192 typeArrayHandle new_names(THREAD, names);
2193
2194 if (!old_head.is_null()) {
2195 old_head->obj_at_put(trace_next_offset, new_head());
2196 }
2197 new_head->obj_at_put(trace_methods_offset, new_methods());
2198 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2199 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2200 new_head->obj_at_put(trace_names_offset, new_names());
2201 new_head->obj_at_put(trace_hidden_offset, NULL);
2202
2203 _head = new_head();
2204 _methods = new_methods();
2205 _bcis = new_bcis();
2206 _mirrors = new_mirrors();
2207 _names = new_names();
2208 _index = 0;
2209 }
2210
2211 oop backtrace() {
2212 return _backtrace();
2213 }
2214
2215 inline void push(Method* method, int bci, TRAPS) {
2216 // Smear the -1 bci to 0 since the array only holds unsigned
2217 // shorts. The later line number lookup would just smear the -1
2218 // to a 0 even if it could be recorded.
2219 if (bci == SynchronizationEntryBCI) bci = 0;
2220
2221 if (_index >= trace_chunk_size) {
2222 methodHandle mhandle(THREAD, method);
2223 expand(CHECK);
2224 method = mhandle();
2225 }
2226
2227 _methods->ushort_at_put(_index, method->orig_method_idnum());
2228 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2229
2230 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2231 // klass owning the symbols alive so their refcounts aren't decremented.
2232 Symbol* name = method->name();
2233 _names->symbol_at_put(_index, name);
2234
2235 // We need to save the mirrors in the backtrace to keep the class
2236 // from being unloaded while we still have this stack trace.
2237 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2238 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2239 _index++;
2240 }
2241
2242 void set_has_hidden_top_frame(TRAPS) {
2243 if (_has_hidden_top_frame == NULL) {
2244 // It would be nice to add java/lang/Boolean::TRUE here
2245 // to indicate that this backtrace has a hidden top frame.
2246 // But this code is used before TRUE is allocated.
2247 // Therefor let's just use an arbitrary legal oop
2248 // available right here. We only test for != null
2249 // anyways. _methods is a short[].
2250 assert(_methods != NULL, "we need a legal oop");
2251 _has_hidden_top_frame = _methods;
2252 _head->obj_at_put(trace_hidden_offset, _has_hidden_top_frame);
2253 }
2254 }
2255
2256 };
2257
2258 struct BacktraceElement : public StackObj {
2259 int _method_id;
2260 int _bci;
2261 int _version;
2262 Symbol* _name;
2263 Handle _mirror;
2264 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2265 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2266 };
2267
2268 class BacktraceIterator : public StackObj {
2269 int _index;
2270 objArrayHandle _result;
2271 objArrayHandle _mirrors;
2272 typeArrayHandle _methods;
2273 typeArrayHandle _bcis;
2274 typeArrayHandle _names;
2275
2276 void init(objArrayHandle result, Thread* thread) {
2277 // Get method id, bci, version and mirror from chunk
2278 _result = result;
2279 if (_result.not_null()) {
2280 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2281 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2282 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2283 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2284 _index = 0;
2285 }
2286 }
2287 public:
2288 BacktraceIterator(objArrayHandle result, Thread* thread) {
2289 init(result, thread);
2290 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2291 }
2292
2293 BacktraceElement next(Thread* thread) {
2294 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2295 _methods->ushort_at(_index),
2296 Backtrace::version_at(_bcis->int_at(_index)),
2297 Backtrace::bci_at(_bcis->int_at(_index)),
2298 _names->symbol_at(_index));
2299 _index++;
2300
2301 if (_index >= java_lang_Throwable::trace_chunk_size) {
2302 int next_offset = java_lang_Throwable::trace_next_offset;
2303 // Get next chunk
2304 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2305 init(result, thread);
2306 }
2307 return e;
2308 }
2309
2310 bool repeat() {
2311 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2312 }
2313 };
2314
2315
2316 // Print stack trace element to resource allocated buffer
2317 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2318 int version, int bci, Symbol* name) {
2319 ResourceMark rm;
2320
2321 // Get strings and string lengths
2322 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2323 const char* klass_name = holder->external_name();
2324 int buf_len = (int)strlen(klass_name);
2325
2326 char* method_name = name->as_C_string();
2327 buf_len += (int)strlen(method_name);
2328
2329 char* source_file_name = NULL;
2330 Symbol* source = Backtrace::get_source_file_name(holder, version);
2331 if (source != NULL) {
2332 source_file_name = source->as_C_string();
2333 buf_len += (int)strlen(source_file_name);
2334 }
2335
2336 char *module_name = NULL, *module_version = NULL;
2337 ModuleEntry* module = holder->module();
2338 if (module->is_named()) {
2339 module_name = module->name()->as_C_string();
2340 buf_len += (int)strlen(module_name);
2341 if (module->version() != NULL) {
2342 module_version = module->version()->as_C_string();
2343 buf_len += (int)strlen(module_version);
2344 }
2345 }
2346
2347 // Allocate temporary buffer with extra space for formatting and line number
2348 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2349
2350 // Print stack trace line in buffer
2351 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2352
2353 // Print module information
2354 if (module_name != NULL) {
2355 if (module_version != NULL) {
2356 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2357 } else {
2358 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2359 }
2360 }
2361
2362 // The method can be NULL if the requested class version is gone
2363 Method* method = holder->method_with_orig_idnum(method_id, version);
2364 if (!version_matches(method, version)) {
2365 strcat(buf, "Redefined)");
2366 } else {
2367 int line_number = Backtrace::get_line_number(method, bci);
2368 if (line_number == -2) {
2369 strcat(buf, "Native Method)");
2370 } else {
2371 if (source_file_name != NULL && (line_number != -1)) {
2372 // Sourcename and linenumber
2373 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2374 } else if (source_file_name != NULL) {
2375 // Just sourcename
2376 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2377 } else {
2378 // Neither sourcename nor linenumber
2379 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2380 }
2381 CompiledMethod* nm = method->code();
2382 if (WizardMode && nm != NULL) {
2383 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2384 }
2385 }
2386 }
2387
2388 st->print_cr("%s", buf);
2389 }
2390
2391 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2392 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2393 int method_id = method->orig_method_idnum();
2394 int version = method->constants()->version();
2395 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2396 }
2397
2398 /**
2399 * Print the throwable message and its stack trace plus all causes by walking the
2400 * cause chain. The output looks the same as of Throwable.printStackTrace().
2401 */
2402 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2403 // First, print the message.
2404 print(throwable(), st);
2405 st->cr();
2406
2407 // Now print the stack trace.
2408 Thread* THREAD = Thread::current();
2409 while (throwable.not_null()) {
2410 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2411 if (result.is_null()) {
2412 st->print_raw_cr("\t<<no stack trace available>>");
2413 return;
2414 }
2415 BacktraceIterator iter(result, THREAD);
2416
2417 while (iter.repeat()) {
2418 BacktraceElement bte = iter.next(THREAD);
2419 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2420 }
2421 {
2422 // Call getCause() which doesn't necessarily return the _cause field.
2423 EXCEPTION_MARK;
2424 JavaValue cause(T_OBJECT);
2425 JavaCalls::call_virtual(&cause,
2426 throwable,
2427 throwable->klass(),
2428 vmSymbols::getCause_name(),
2429 vmSymbols::void_throwable_signature(),
2430 THREAD);
2431 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2432 if (HAS_PENDING_EXCEPTION) {
2433 CLEAR_PENDING_EXCEPTION;
2434 throwable = Handle();
2435 } else {
2436 throwable = Handle(THREAD, (oop) cause.get_jobject());
2437 if (throwable.not_null()) {
2438 st->print("Caused by: ");
2439 print(throwable(), st);
2440 st->cr();
2441 }
2442 }
2443 }
2444 }
2445 }
2446
2447 /**
2448 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2449 */
2450 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2451 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2452 JavaValue result(T_VOID);
2453 JavaCalls::call_virtual(&result,
2454 throwable,
2455 SystemDictionary::Throwable_klass(),
2456 vmSymbols::printStackTrace_name(),
2457 vmSymbols::void_method_signature(),
2458 THREAD);
2459 }
2460
2461 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2462 if (!StackTraceInThrowable) return;
2463 ResourceMark rm(THREAD);
2464
2465 // Start out by clearing the backtrace for this object, in case the VM
2466 // runs out of memory while allocating the stack trace
2467 set_backtrace(throwable(), NULL);
2468 // Clear lazily constructed Java level stacktrace if refilling occurs
2469 // This is unnecessary in 1.7+ but harmless
2470 clear_stacktrace(throwable());
2471
2472 int max_depth = MaxJavaStackTraceDepth;
2473 JavaThread* thread = (JavaThread*)THREAD;
2474
2475 BacktraceBuilder bt(CHECK);
2476
2477 // If there is no Java frame just return the method that was being called
2478 // with bci 0
2479 if (!thread->has_last_Java_frame()) {
2480 if (max_depth >= 1 && method() != NULL) {
2481 bt.push(method(), 0, CHECK);
2482 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2483 set_depth(throwable(), 1);
2484 set_backtrace(throwable(), bt.backtrace());
2485 }
2486 return;
2487 }
2488
2489 // Instead of using vframe directly, this version of fill_in_stack_trace
2490 // basically handles everything by hand. This significantly improved the
2491 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2492 // See bug 6333838 for more details.
2493 // The "ASSERT" here is to verify this method generates the exactly same stack
2494 // trace as utilizing vframe.
2495 #ifdef ASSERT
2496 vframeStream st(thread);
2497 #endif
2498 int total_count = 0;
2499 RegisterMap map(thread, false);
2500 int decode_offset = 0;
2501 CompiledMethod* nm = NULL;
2502 bool skip_fillInStackTrace_check = false;
2503 bool skip_throwableInit_check = false;
2504 bool skip_hidden = !ShowHiddenFrames;
2505
2506 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2507 Method* method = NULL;
2508 int bci = 0;
2509
2510 // Compiled java method case.
2511 if (decode_offset != 0) {
2512 DebugInfoReadStream stream(nm, decode_offset);
2513 decode_offset = stream.read_int();
2514 method = (Method*)nm->metadata_at(stream.read_int());
2515 bci = stream.read_bci();
2516 } else {
2517 if (fr.is_first_frame()) break;
2518 address pc = fr.pc();
2519 if (fr.is_interpreted_frame()) {
2520 address bcp = fr.interpreter_frame_bcp();
2521 method = fr.interpreter_frame_method();
2522 bci = method->bci_from(bcp);
2523 fr = fr.sender(&map);
2524 } else {
2525 CodeBlob* cb = fr.cb();
2526 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2527 // but non nmethod
2528 fr = fr.sender(&map);
2529 if (cb == NULL || !cb->is_compiled()) {
2530 continue;
2531 }
2532 nm = cb->as_compiled_method();
2533 if (nm->method()->is_native()) {
2534 method = nm->method();
2535 bci = 0;
2536 } else {
2537 PcDesc* pd = nm->pc_desc_at(pc);
2538 decode_offset = pd->scope_decode_offset();
2539 // if decode_offset is not equal to 0, it will execute the
2540 // "compiled java method case" at the beginning of the loop.
2541 continue;
2542 }
2543 }
2544 }
2545 #ifdef ASSERT
2546 assert(st.method() == method && st.bci() == bci,
2547 "Wrong stack trace");
2548 st.next();
2549 #endif
2550
2551 // the format of the stacktrace will be:
2552 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2553 // - 0 or more <init> methods for the exception class (skipped)
2554 // - rest of the stack
2555
2556 if (!skip_fillInStackTrace_check) {
2557 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2558 throwable->is_a(method->method_holder())) {
2559 continue;
2560 }
2561 else {
2562 skip_fillInStackTrace_check = true; // gone past them all
2563 }
2564 }
2565 if (!skip_throwableInit_check) {
2566 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2567
2568 // skip <init> methods of the exception class and superclasses
2569 // This is similar to classic VM (before HotSpot).
2570 if (method->is_object_constructor() &&
2571 throwable->is_a(method->method_holder())) {
2572 continue;
2573 } else {
2574 // there are none or we've seen them all - either way stop checking
2575 skip_throwableInit_check = true;
2576 }
2577 }
2578 if (method->is_hidden()) {
2579 if (skip_hidden) {
2580 if (total_count == 0) {
2581 // The top frame will be hidden from the stack trace.
2582 bt.set_has_hidden_top_frame(CHECK);
2583 }
2584 continue;
2585 }
2586 }
2587 bt.push(method, bci, CHECK);
2588 total_count++;
2589 }
2590
2591 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2592
2593 // Put completed stack trace into throwable object
2594 set_backtrace(throwable(), bt.backtrace());
2595 set_depth(throwable(), total_count);
2596 }
2597
2598 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2599 // No-op if stack trace is disabled
2600 if (!StackTraceInThrowable) {
2601 return;
2602 }
2603
2604 // Disable stack traces for some preallocated out of memory errors
2605 if (!Universe::should_fill_in_stack_trace(throwable)) {
2606 return;
2607 }
2608
2609 PRESERVE_EXCEPTION_MARK;
2610
2611 JavaThread* thread = JavaThread::active();
2612 fill_in_stack_trace(throwable, method, thread);
2613 // ignore exceptions thrown during stack trace filling
2614 CLEAR_PENDING_EXCEPTION;
2615 }
2616
2617 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2618 // Allocate stack trace - backtrace is created but not filled in
2619
2620 // No-op if stack trace is disabled
2621 if (!StackTraceInThrowable) return;
2622 BacktraceBuilder bt(CHECK); // creates a backtrace
2623 set_backtrace(throwable(), bt.backtrace());
2624 }
2625
2626
2627 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2628 // Fill in stack trace into preallocated backtrace (no GC)
2629
2630 // No-op if stack trace is disabled
2631 if (!StackTraceInThrowable) return;
2632
2633 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2634
2635 JavaThread* THREAD = JavaThread::current();
2636
2637 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2638 assert(backtrace.not_null(), "backtrace should have been preallocated");
2639
2640 ResourceMark rm(THREAD);
2641 vframeStream st(THREAD);
2642
2643 BacktraceBuilder bt(THREAD, backtrace);
2644
2645 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2646 // methods as preallocated errors aren't created by "java" code.
2647
2648 // fill in as much stack trace as possible
2649 int chunk_count = 0;
2650 for (;!st.at_end(); st.next()) {
2651 bt.push(st.method(), st.bci(), CHECK);
2652 chunk_count++;
2653
2654 // Bail-out for deep stacks
2655 if (chunk_count >= trace_chunk_size) break;
2656 }
2657 set_depth(throwable(), chunk_count);
2658 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2659
2660 // We support the Throwable immutability protocol defined for Java 7.
2661 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2662 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2663 }
2664
2665 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2666 objArrayHandle stack_trace_array_h, TRAPS) {
2667
2668 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2669 THROW(vmSymbols::java_lang_NullPointerException());
2670 }
2671
2672 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2673
2674 if (stack_trace_array_h->length() != depth(throwable())) {
2675 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2676 }
2677
2678 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2679 BacktraceIterator iter(result, THREAD);
2680
2681 int index = 0;
2682 while (iter.repeat()) {
2683 BacktraceElement bte = iter.next(THREAD);
2684
2685 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2686
2687 if (stack_trace_element.is_null()) {
2688 THROW(vmSymbols::java_lang_NullPointerException());
2689 }
2690
2691 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2692 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2693
2694 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2695 method,
2696 bte._version,
2697 bte._bci,
2698 bte._name, CHECK);
2699 }
2700 }
2701
2702 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2703 Thread* THREAD = Thread::current();
2704 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable)));
2705 BacktraceIterator iter(result, THREAD);
2706 // No backtrace available.
2707 if (!iter.repeat()) return false;
2708
2709 // If the exception happened in a frame that has been hidden, i.e.,
2710 // omitted from the back trace, we can not compute the message.
2711 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2712 if (hidden != NULL) {
2713 return false;
2714 }
2715
2716 // Get first backtrace element.
2717 BacktraceElement bte = iter.next(THREAD);
2718
2719 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2720 assert(holder != NULL, "first element should be non-null");
2721 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2722
2723 // Original version is no longer available.
2724 if (m == NULL || !version_matches(m, bte._version)) {
2725 return false;
2726 }
2727
2728 *method = m;
2729 *bci = bte._bci;
2730 return true;
2731 }
2732
2733 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2734 // Allocate java.lang.StackTraceElement instance
2735 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2736 assert(k != NULL, "must be loaded in 1.4+");
2737 if (k->should_be_initialized()) {
2738 k->initialize(CHECK_0);
2739 }
2740
2741 Handle element = k->allocate_instance_handle(CHECK_0);
2742
2743 int version = method->constants()->version();
2744 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2745 return element();
2746 }
2747
2748 void java_lang_StackTraceElement::fill_in(Handle element,
2749 InstanceKlass* holder, const methodHandle& method,
2750 int version, int bci, Symbol* name, TRAPS) {
2751 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2752
2753 ResourceMark rm(THREAD);
2754 HandleMark hm(THREAD);
2755
2756 // Fill in class name
2757 Handle java_class(THREAD, holder->java_mirror());
2758 oop classname = java_lang_Class::name(java_class, CHECK);
2759 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2760 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2761
2762 oop loader = holder->class_loader();
2763 if (loader != NULL) {
2764 oop loader_name = java_lang_ClassLoader::name(loader);
2765 if (loader_name != NULL)
2766 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2767 }
2768
2769 // Fill in method name
2770 oop methodname = StringTable::intern(name, CHECK);
2771 java_lang_StackTraceElement::set_methodName(element(), methodname);
2772
2773 // Fill in module name and version
2774 ModuleEntry* module = holder->module();
2775 if (module->is_named()) {
2776 oop module_name = StringTable::intern(module->name(), CHECK);
2777 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2778 oop module_version;
2779 if (module->version() != NULL) {
2780 module_version = StringTable::intern(module->version(), CHECK);
2781 } else {
2782 module_version = NULL;
2783 }
2784 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2785 }
2786
2787 if (method() == NULL || !version_matches(method(), version)) {
2788 // The method was redefined, accurate line number information isn't available
2789 java_lang_StackTraceElement::set_fileName(element(), NULL);
2790 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2791 } else {
2792 // Fill in source file name and line number.
2793 Symbol* source = Backtrace::get_source_file_name(holder, version);
2794 oop source_file = java_lang_Class::source_file(java_class());
2795 if (source != NULL) {
2796 // Class was not redefined. We can trust its cache if set,
2797 // else we have to initialize it.
2798 if (source_file == NULL) {
2799 source_file = StringTable::intern(source, CHECK);
2800 java_lang_Class::set_source_file(java_class(), source_file);
2801 }
2802 } else {
2803 // Class was redefined. Dump the cache if it was set.
2804 if (source_file != NULL) {
2805 source_file = NULL;
2806 java_lang_Class::set_source_file(java_class(), source_file);
2807 }
2808 }
2809 java_lang_StackTraceElement::set_fileName(element(), source_file);
2810
2811 int line_number = Backtrace::get_line_number(method(), bci);
2812 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2813 }
2814 }
2815
2816 #if INCLUDE_JVMCI
2817 void java_lang_StackTraceElement::decode(Handle mirror, methodHandle method, int bci, Symbol*& methodname, Symbol*& filename, int& line_number) {
2818 int method_id = method->orig_method_idnum();
2819 int cpref = method->name_index();
2820 decode(mirror, method_id, method->constants()->version(), bci, cpref, methodname, filename, line_number);
2821 }
2822
2823 void java_lang_StackTraceElement::decode(Handle mirror, int method_id, int version, int bci, int cpref, Symbol*& methodname, Symbol*& filename, int& line_number) {
2824 // Fill in class name
2825 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2826 Method* method = holder->method_with_orig_idnum(method_id, version);
2827
2828 // The method can be NULL if the requested class version is gone
2829 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
2830
2831 // Fill in method name
2832 methodname = sym;
2833
2834 if (!version_matches(method, version)) {
2835 // If the method was redefined, accurate line number information isn't available
2836 filename = NULL;
2837 line_number = -1;
2838 } else {
2839 // Fill in source file name and line number.
2840 // Use a specific ik version as a holder since the mirror might
2841 // refer to a version that is now obsolete and no longer accessible
2842 // via the previous versions list.
2843 holder = holder->get_klass_version(version);
2844 assert(holder != NULL, "sanity check");
2845 filename = holder->source_file_name();
2846 line_number = Backtrace::get_line_number(method, bci);
2847 }
2848 }
2849 #endif // INCLUDE_JVMCI
2850
2851 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2852 HandleMark hm(THREAD);
2853 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2854 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2855 // we should expand MemberName::name when Throwable uses StackTrace
2856 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2857 return method;
2858 }
2859
2860 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2861 // set Method* or mid/cpref
2862 HandleMark hm(THREAD);
2863 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2864 InstanceKlass* ik = method->method_holder();
2865 CallInfo info(method(), ik, CHECK);
2866 MethodHandles::init_method_MemberName(mname, info);
2867 // set bci
2868 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2869 // method may be redefined; store the version
2870 int version = method->constants()->version();
2871 assert((jushort)version == version, "version should be short");
2872 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2873 }
2874
2875 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2876 ResourceMark rm(THREAD);
2877 HandleMark hm(THREAD);
2878 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2879 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2880 InstanceKlass* holder = InstanceKlass::cast(clazz);
2881 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2882
2883 short version = stackFrame->short_field(_version_offset);
2884 int bci = stackFrame->int_field(_bci_offset);
2885 Symbol* name = method->name();
2886 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method),
2887 version, bci, name, CHECK);
2888 }
2889
2890 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2891 macro(_memberName_offset, k, "memberName", object_signature, false); \
2892 macro(_bci_offset, k, "bci", int_signature, false)
2893
2894 void java_lang_StackFrameInfo::compute_offsets() {
2895 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2896 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2897 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2898 }
2899
2900 #if INCLUDE_CDS
2901 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2902 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2903 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2904 }
2905 #endif
2906
2907 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2908 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2909 macro(_locals_offset, k, "locals", object_array_signature, false); \
2910 macro(_operands_offset, k, "operands", object_array_signature, false); \
2911 macro(_mode_offset, k, "mode", int_signature, false)
2912
2913 void java_lang_LiveStackFrameInfo::compute_offsets() {
2914 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2915 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2916 }
2917
2918 #if INCLUDE_CDS
2919 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2920 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2921 }
2922 #endif
2923
2924 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2925 macro(override_offset, k, "override", bool_signature, false)
2926
2927 void java_lang_reflect_AccessibleObject::compute_offsets() {
2928 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2929 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2930 }
2931
2932 #if INCLUDE_CDS
2933 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2934 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2935 }
2936 #endif
2937
2938 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2939 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2940 return (jboolean) reflect->bool_field(override_offset);
2941 }
2942
2943 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2944 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2945 reflect->bool_field_put(override_offset, (int) value);
2946 }
2947
2948 #define METHOD_FIELDS_DO(macro) \
2949 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2950 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2951 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2952 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2953 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2954 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2955 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2956 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2957 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2958 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2959 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2960
2961 void java_lang_reflect_Method::compute_offsets() {
2962 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2963 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2964 }
2965
2966 #if INCLUDE_CDS
2967 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2968 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2969 }
2970 #endif
2971
2972 Handle java_lang_reflect_Method::create(TRAPS) {
2973 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2974 Klass* klass = SystemDictionary::reflect_Method_klass();
2975 // This class is eagerly initialized during VM initialization, since we keep a refence
2976 // to one of the methods
2977 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2978 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2979 }
2980
2981 oop java_lang_reflect_Method::clazz(oop reflect) {
2982 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2983 return reflect->obj_field(clazz_offset);
2984 }
2985
2986 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2988 reflect->obj_field_put(clazz_offset, value);
2989 }
2990
2991 int java_lang_reflect_Method::slot(oop reflect) {
2992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2993 return reflect->int_field(slot_offset);
2994 }
2995
2996 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2998 reflect->int_field_put(slot_offset, value);
2999 }
3000
3001 void java_lang_reflect_Method::set_name(oop method, oop value) {
3002 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3003 method->obj_field_put(name_offset, value);
3004 }
3005
3006 oop java_lang_reflect_Method::return_type(oop method) {
3007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3008 return method->obj_field(returnType_offset);
3009 }
3010
3011 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3013 method->obj_field_put(returnType_offset, value);
3014 }
3015
3016 oop java_lang_reflect_Method::parameter_types(oop method) {
3017 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3018 return method->obj_field(parameterTypes_offset);
3019 }
3020
3021 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3023 method->obj_field_put(parameterTypes_offset, value);
3024 }
3025
3026 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3027 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3028 method->obj_field_put(exceptionTypes_offset, value);
3029 }
3030
3031 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3032 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3033 method->int_field_put(modifiers_offset, value);
3034 }
3035
3036 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3038 method->obj_field_put(signature_offset, value);
3039 }
3040
3041 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3042 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3043 method->obj_field_put(annotations_offset, value);
3044 }
3045
3046 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3048 method->obj_field_put(parameter_annotations_offset, value);
3049 }
3050
3051 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3053 method->obj_field_put(annotation_default_offset, value);
3054 }
3055
3056 #define CONSTRUCTOR_FIELDS_DO(macro) \
3057 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3058 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3059 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3060 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3061 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3062 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3063 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3064 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3065
3066 void java_lang_reflect_Constructor::compute_offsets() {
3067 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
3068 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3069 }
3070
3071 #if INCLUDE_CDS
3072 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3073 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3074 }
3075 #endif
3076
3077 Handle java_lang_reflect_Constructor::create(TRAPS) {
3078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3079 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3080 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3081 InstanceKlass* ik = InstanceKlass::cast(k);
3082 // Ensure it is initialized
3083 ik->initialize(CHECK_NH);
3084 return ik->allocate_instance_handle(THREAD);
3085 }
3086
3087 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3088 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3089 return reflect->obj_field(clazz_offset);
3090 }
3091
3092 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3094 reflect->obj_field_put(clazz_offset, value);
3095 }
3096
3097 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3098 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3099 return constructor->obj_field(parameterTypes_offset);
3100 }
3101
3102 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3103 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3104 constructor->obj_field_put(parameterTypes_offset, value);
3105 }
3106
3107 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3108 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3109 constructor->obj_field_put(exceptionTypes_offset, value);
3110 }
3111
3112 int java_lang_reflect_Constructor::slot(oop reflect) {
3113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3114 return reflect->int_field(slot_offset);
3115 }
3116
3117 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3118 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3119 reflect->int_field_put(slot_offset, value);
3120 }
3121
3122 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3124 constructor->int_field_put(modifiers_offset, value);
3125 }
3126
3127 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3128 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3129 constructor->obj_field_put(signature_offset, value);
3130 }
3131
3132 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3133 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3134 constructor->obj_field_put(annotations_offset, value);
3135 }
3136
3137 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3138 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3139 method->obj_field_put(parameter_annotations_offset, value);
3140 }
3141
3142 #define FIELD_FIELDS_DO(macro) \
3143 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3144 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3145 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3146 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3147 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3148 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3149 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3150
3151 void java_lang_reflect_Field::compute_offsets() {
3152 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3153 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3154 }
3155
3156 #if INCLUDE_CDS
3157 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3158 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3159 }
3160 #endif
3161
3162 Handle java_lang_reflect_Field::create(TRAPS) {
3163 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3164 Symbol* name = vmSymbols::java_lang_reflect_Field();
3165 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3166 InstanceKlass* ik = InstanceKlass::cast(k);
3167 // Ensure it is initialized
3168 ik->initialize(CHECK_NH);
3169 return ik->allocate_instance_handle(THREAD);
3170 }
3171
3172 oop java_lang_reflect_Field::clazz(oop reflect) {
3173 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3174 return reflect->obj_field(clazz_offset);
3175 }
3176
3177 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3178 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3179 reflect->obj_field_put(clazz_offset, value);
3180 }
3181
3182 oop java_lang_reflect_Field::name(oop field) {
3183 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3184 return field->obj_field(name_offset);
3185 }
3186
3187 void java_lang_reflect_Field::set_name(oop field, oop value) {
3188 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3189 field->obj_field_put(name_offset, value);
3190 }
3191
3192 oop java_lang_reflect_Field::type(oop field) {
3193 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3194 return field->obj_field(type_offset);
3195 }
3196
3197 void java_lang_reflect_Field::set_type(oop field, oop value) {
3198 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3199 field->obj_field_put(type_offset, value);
3200 }
3201
3202 int java_lang_reflect_Field::slot(oop reflect) {
3203 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3204 return reflect->int_field(slot_offset);
3205 }
3206
3207 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3208 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3209 reflect->int_field_put(slot_offset, value);
3210 }
3211
3212 int java_lang_reflect_Field::modifiers(oop field) {
3213 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3214 return field->int_field(modifiers_offset);
3215 }
3216
3217 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3218 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3219 field->int_field_put(modifiers_offset, value);
3220 }
3221
3222 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3223 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3224 field->obj_field_put(signature_offset, value);
3225 }
3226
3227 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3228 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3229 field->obj_field_put(annotations_offset, value);
3230 }
3231
3232 #define CONSTANTPOOL_FIELDS_DO(macro) \
3233 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3234
3235 void reflect_ConstantPool::compute_offsets() {
3236 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3237 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3238 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3239 }
3240
3241 #if INCLUDE_CDS
3242 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3243 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3244 }
3245 #endif
3246
3247 #define PARAMETER_FIELDS_DO(macro) \
3248 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3249 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3250 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3251 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3252
3253 void java_lang_reflect_Parameter::compute_offsets() {
3254 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3255 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3256 }
3257
3258 #if INCLUDE_CDS
3259 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3260 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3261 }
3262 #endif
3263
3264 Handle java_lang_reflect_Parameter::create(TRAPS) {
3265 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3266 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3267 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3268 InstanceKlass* ik = InstanceKlass::cast(k);
3269 // Ensure it is initialized
3270 ik->initialize(CHECK_NH);
3271 return ik->allocate_instance_handle(THREAD);
3272 }
3273
3274 oop java_lang_reflect_Parameter::name(oop param) {
3275 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3276 return param->obj_field(name_offset);
3277 }
3278
3279 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3280 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3281 param->obj_field_put(name_offset, value);
3282 }
3283
3284 int java_lang_reflect_Parameter::modifiers(oop param) {
3285 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3286 return param->int_field(modifiers_offset);
3287 }
3288
3289 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3290 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3291 param->int_field_put(modifiers_offset, value);
3292 }
3293
3294 int java_lang_reflect_Parameter::index(oop param) {
3295 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3296 return param->int_field(index_offset);
3297 }
3298
3299 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3300 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3301 param->int_field_put(index_offset, value);
3302 }
3303
3304 oop java_lang_reflect_Parameter::executable(oop param) {
3305 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3306 return param->obj_field(executable_offset);
3307 }
3308
3309 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3310 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3311 param->obj_field_put(executable_offset, value);
3312 }
3313
3314
3315 int java_lang_Module::loader_offset;
3316 int java_lang_Module::name_offset;
3317 int java_lang_Module::_module_entry_offset = -1;
3318
3319 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3320 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3321 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3322 vmSymbols::java_lang_module_init_signature(),
3323 loader, module_name, CHECK_NH);
3324 }
3325
3326 #define MODULE_FIELDS_DO(macro) \
3327 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3328 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3329
3330 void java_lang_Module::compute_offsets() {
3331 InstanceKlass* k = SystemDictionary::Module_klass();
3332 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3333 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3334 }
3335
3336 #if INCLUDE_CDS
3337 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3338 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3339 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3340 }
3341 #endif
3342
3343 oop java_lang_Module::loader(oop module) {
3344 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3345 return module->obj_field(loader_offset);
3346 }
3347
3348 void java_lang_Module::set_loader(oop module, oop value) {
3349 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3350 module->obj_field_put(loader_offset, value);
3351 }
3352
3353 oop java_lang_Module::name(oop module) {
3354 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3355 return module->obj_field(name_offset);
3356 }
3357
3358 void java_lang_Module::set_name(oop module, oop value) {
3359 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3360 module->obj_field_put(name_offset, value);
3361 }
3362
3363 ModuleEntry* java_lang_Module::module_entry(oop module) {
3364 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3365 assert(module != NULL, "module can't be null");
3366 assert(oopDesc::is_oop(module), "module must be oop");
3367
3368 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3369 if (module_entry == NULL) {
3370 // If the inject field containing the ModuleEntry* is null then return the
3371 // class loader's unnamed module.
3372 oop loader = java_lang_Module::loader(module);
3373 Handle h_loader = Handle(Thread::current(), loader);
3374 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3375 return loader_cld->unnamed_module();
3376 }
3377 return module_entry;
3378 }
3379
3380 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3381 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3382 assert(module != NULL, "module can't be null");
3383 assert(oopDesc::is_oop(module), "module must be oop");
3384 module->address_field_put(_module_entry_offset, (address)module_entry);
3385 }
3386
3387 Handle reflect_ConstantPool::create(TRAPS) {
3388 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3389 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3390 // Ensure it is initialized
3391 k->initialize(CHECK_NH);
3392 return k->allocate_instance_handle(THREAD);
3393 }
3394
3395
3396 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3397 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3398 oop mirror = value->pool_holder()->java_mirror();
3399 // Save the mirror to get back the constant pool.
3400 reflect->obj_field_put(_oop_offset, mirror);
3401 }
3402
3403 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3404 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3405
3406 oop mirror = reflect->obj_field(_oop_offset);
3407 Klass* k = java_lang_Class::as_Klass(mirror);
3408 assert(k->is_instance_klass(), "Must be");
3409
3410 // Get the constant pool back from the klass. Since class redefinition
3411 // merges the new constant pool into the old, this is essentially the
3412 // same constant pool as the original. If constant pool merging is
3413 // no longer done in the future, this will have to change to save
3414 // the original.
3415 return InstanceKlass::cast(k)->constants();
3416 }
3417
3418 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3419 macro(_base_offset, k, "base", object_signature, false)
3420
3421 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3422 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3423 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3424 }
3425
3426 #if INCLUDE_CDS
3427 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3428 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3429 }
3430 #endif
3431
3432 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3433 Klass* k = SystemDictionary::box_klass(type);
3434 if (k == NULL) return NULL;
3435 InstanceKlass* ik = InstanceKlass::cast(k);
3436 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3437 return ik->allocate_instance(THREAD);
3438 }
3439
3440
3441 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3442 oop box = initialize_and_allocate(type, CHECK_0);
3443 if (box == NULL) return NULL;
3444 switch (type) {
3445 case T_BOOLEAN:
3446 box->bool_field_put(value_offset, value->z);
3447 break;
3448 case T_CHAR:
3449 box->char_field_put(value_offset, value->c);
3450 break;
3451 case T_FLOAT:
3452 box->float_field_put(value_offset, value->f);
3453 break;
3454 case T_DOUBLE:
3455 box->double_field_put(long_value_offset, value->d);
3456 break;
3457 case T_BYTE:
3458 box->byte_field_put(value_offset, value->b);
3459 break;
3460 case T_SHORT:
3461 box->short_field_put(value_offset, value->s);
3462 break;
3463 case T_INT:
3464 box->int_field_put(value_offset, value->i);
3465 break;
3466 case T_LONG:
3467 box->long_field_put(long_value_offset, value->j);
3468 break;
3469 default:
3470 return NULL;
3471 }
3472 return box;
3473 }
3474
3475
3476 BasicType java_lang_boxing_object::basic_type(oop box) {
3477 if (box == NULL) return T_ILLEGAL;
3478 BasicType type = SystemDictionary::box_klass_type(box->klass());
3479 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3480 return T_ILLEGAL;
3481 return type;
3482 }
3483
3484
3485 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3486 BasicType type = SystemDictionary::box_klass_type(box->klass());
3487 switch (type) {
3488 case T_BOOLEAN:
3489 value->z = box->bool_field(value_offset);
3490 break;
3491 case T_CHAR:
3492 value->c = box->char_field(value_offset);
3493 break;
3494 case T_FLOAT:
3495 value->f = box->float_field(value_offset);
3496 break;
3497 case T_DOUBLE:
3498 value->d = box->double_field(long_value_offset);
3499 break;
3500 case T_BYTE:
3501 value->b = box->byte_field(value_offset);
3502 break;
3503 case T_SHORT:
3504 value->s = box->short_field(value_offset);
3505 break;
3506 case T_INT:
3507 value->i = box->int_field(value_offset);
3508 break;
3509 case T_LONG:
3510 value->j = box->long_field(long_value_offset);
3511 break;
3512 default:
3513 return T_ILLEGAL;
3514 } // end switch
3515 return type;
3516 }
3517
3518
3519 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3520 BasicType type = SystemDictionary::box_klass_type(box->klass());
3521 switch (type) {
3522 case T_BOOLEAN:
3523 box->bool_field_put(value_offset, value->z);
3524 break;
3525 case T_CHAR:
3526 box->char_field_put(value_offset, value->c);
3527 break;
3528 case T_FLOAT:
3529 box->float_field_put(value_offset, value->f);
3530 break;
3531 case T_DOUBLE:
3532 box->double_field_put(long_value_offset, value->d);
3533 break;
3534 case T_BYTE:
3535 box->byte_field_put(value_offset, value->b);
3536 break;
3537 case T_SHORT:
3538 box->short_field_put(value_offset, value->s);
3539 break;
3540 case T_INT:
3541 box->int_field_put(value_offset, value->i);
3542 break;
3543 case T_LONG:
3544 box->long_field_put(long_value_offset, value->j);
3545 break;
3546 default:
3547 return T_ILLEGAL;
3548 } // end switch
3549 return type;
3550 }
3551
3552
3553 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3554 switch (type) {
3555 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3556 case T_CHAR: st->print("%d", value->c); break;
3557 case T_BYTE: st->print("%d", value->b); break;
3558 case T_SHORT: st->print("%d", value->s); break;
3559 case T_INT: st->print("%d", value->i); break;
3560 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3561 case T_FLOAT: st->print("%f", value->f); break;
3562 case T_DOUBLE: st->print("%lf", value->d); break;
3563 default: st->print("type %d?", type); break;
3564 }
3565 }
3566
3567 // Support for java_lang_ref_Reference
3568
3569 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3570 assert(obj != NULL, "sanity");
3571 if (offset != java_lang_ref_Reference::referent_offset) {
3572 return false;
3573 }
3574
3575 Klass* k = obj->klass();
3576 if (!k->is_instance_klass()) {
3577 return false;
3578 }
3579
3580 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3581 bool is_reference = ik->reference_type() != REF_NONE;
3582 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3583 return is_reference;
3584 }
3585
3586 // Support for java_lang_ref_SoftReference
3587 //
3588
3589 #define SOFTREFERENCE_FIELDS_DO(macro) \
3590 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3591 macro(static_clock_offset, k, "clock", long_signature, true)
3592
3593 void java_lang_ref_SoftReference::compute_offsets() {
3594 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3595 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3596 }
3597
3598 #if INCLUDE_CDS
3599 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3600 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3601 }
3602 #endif
3603
3604 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3605 return ref->long_field(timestamp_offset);
3606 }
3607
3608 jlong java_lang_ref_SoftReference::clock() {
3609 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3610 oop base = ik->static_field_base_raw();
3611 return base->long_field(static_clock_offset);
3612 }
3613
3614 void java_lang_ref_SoftReference::set_clock(jlong value) {
3615 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3616 oop base = ik->static_field_base_raw();
3617 base->long_field_put(static_clock_offset, value);
3618 }
3619
3620 // Support for java_lang_invoke_DirectMethodHandle
3621
3622 int java_lang_invoke_DirectMethodHandle::_member_offset;
3623
3624 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3625 oop member_name = NULL;
3626 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3627 "a DirectMethodHandle oop is expected");
3628 return dmh->obj_field(member_offset_in_bytes());
3629 }
3630
3631 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3632 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3633
3634 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3635 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3636 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3637 }
3638
3639 #if INCLUDE_CDS
3640 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3641 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3642 }
3643 #endif
3644
3645 // Support for java_lang_invoke_MethodHandle
3646
3647 int java_lang_invoke_MethodHandle::_type_offset;
3648 int java_lang_invoke_MethodHandle::_form_offset;
3649
3650 int java_lang_invoke_MemberName::_clazz_offset;
3651 int java_lang_invoke_MemberName::_name_offset;
3652 int java_lang_invoke_MemberName::_type_offset;
3653 int java_lang_invoke_MemberName::_flags_offset;
3654 int java_lang_invoke_MemberName::_method_offset;
3655 int java_lang_invoke_MemberName::_vmindex_offset;
3656
3657 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3658 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3659
3660 int java_lang_invoke_LambdaForm::_vmentry_offset;
3661
3662 #define METHODHANDLE_FIELDS_DO(macro) \
3663 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3664 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3665
3666 void java_lang_invoke_MethodHandle::compute_offsets() {
3667 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3668 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3669 }
3670
3671 #if INCLUDE_CDS
3672 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3673 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3674 }
3675 #endif
3676
3677 #define MEMBERNAME_FIELDS_DO(macro) \
3678 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3679 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3680 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3681 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3682 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3683
3684 void java_lang_invoke_MemberName::compute_offsets() {
3685 InstanceKlass* k = SystemDictionary::MemberName_klass();
3686 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3687 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3688 }
3689
3690 #if INCLUDE_CDS
3691 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3692 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3693 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3694 }
3695 #endif
3696
3697 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3698 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3699 assert(k != NULL, "jdk mismatch");
3700 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3701 }
3702
3703 #if INCLUDE_CDS
3704 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3705 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3706 }
3707 #endif
3708
3709 #define LAMBDAFORM_FIELDS_DO(macro) \
3710 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3711
3712 void java_lang_invoke_LambdaForm::compute_offsets() {
3713 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3714 assert (k != NULL, "jdk mismatch");
3715 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3716 }
3717
3718 #if INCLUDE_CDS
3719 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3720 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3721 }
3722 #endif
3723
3724 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3725 return obj != NULL && is_subclass(obj->klass());
3726 }
3727
3728
3729 oop java_lang_invoke_MethodHandle::type(oop mh) {
3730 return mh->obj_field(_type_offset);
3731 }
3732
3733 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3734 mh->obj_field_put(_type_offset, mtype);
3735 }
3736
3737 oop java_lang_invoke_MethodHandle::form(oop mh) {
3738 assert(_form_offset != 0, "");
3739 return mh->obj_field(_form_offset);
3740 }
3741
3742 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3743 assert(_form_offset != 0, "");
3744 mh->obj_field_put(_form_offset, lform);
3745 }
3746
3747 /// MemberName accessors
3748
3749 oop java_lang_invoke_MemberName::clazz(oop mname) {
3750 assert(is_instance(mname), "wrong type");
3751 return mname->obj_field(_clazz_offset);
3752 }
3753
3754 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3755 assert(is_instance(mname), "wrong type");
3756 mname->obj_field_put(_clazz_offset, clazz);
3757 }
3758
3759 oop java_lang_invoke_MemberName::name(oop mname) {
3760 assert(is_instance(mname), "wrong type");
3761 return mname->obj_field(_name_offset);
3762 }
3763
3764 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3765 assert(is_instance(mname), "wrong type");
3766 mname->obj_field_put(_name_offset, name);
3767 }
3768
3769 oop java_lang_invoke_MemberName::type(oop mname) {
3770 assert(is_instance(mname), "wrong type");
3771 return mname->obj_field(_type_offset);
3772 }
3773
3774 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3775 assert(is_instance(mname), "wrong type");
3776 mname->obj_field_put(_type_offset, type);
3777 }
3778
3779 int java_lang_invoke_MemberName::flags(oop mname) {
3780 assert(is_instance(mname), "wrong type");
3781 return mname->int_field(_flags_offset);
3782 }
3783
3784 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3785 assert(is_instance(mname), "wrong type");
3786 mname->int_field_put(_flags_offset, flags);
3787 }
3788
3789
3790 // Return vmtarget from ResolvedMethodName method field through indirection
3791 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3792 assert(is_instance(mname), "wrong type");
3793 oop method = mname->obj_field(_method_offset);
3794 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3795 }
3796
3797 bool java_lang_invoke_MemberName::is_method(oop mname) {
3798 assert(is_instance(mname), "must be MemberName");
3799 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
3800 }
3801
3802 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3803 assert(is_instance(mname), "wrong type");
3804 mname->obj_field_put(_method_offset, resolved_method);
3805 }
3806
3807 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3808 assert(is_instance(mname), "wrong type");
3809 return (intptr_t) mname->address_field(_vmindex_offset);
3810 }
3811
3812 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3813 assert(is_instance(mname), "wrong type");
3814 mname->address_field_put(_vmindex_offset, (address) index);
3815 }
3816
3817
3818 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3819 assert(is_instance(resolved_method), "wrong type");
3820 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3821 assert(m->is_method(), "must be");
3822 return m;
3823 }
3824
3825 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3826 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3827 assert(is_instance(resolved_method), "wrong type");
3828 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3829 }
3830
3831 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
3832 assert(is_instance(resolved_method), "wrong type");
3833 resolved_method->obj_field_put(_vmholder_offset, holder);
3834 }
3835
3836 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3837 const Method* method = m();
3838
3839 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3840 oop resolved_method = ResolvedMethodTable::find_method(method);
3841 if (resolved_method != NULL) {
3842 return resolved_method;
3843 }
3844
3845 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3846 if (!k->is_initialized()) {
3847 k->initialize(CHECK_NULL);
3848 }
3849
3850 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3851
3852 NoSafepointVerifier nsv;
3853
3854 if (method->is_old()) {
3855 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
3856 method->get_new_method();
3857 }
3858
3859 InstanceKlass* holder = method->method_holder();
3860
3861 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
3862 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3863 // distinct loaders) to ensure the metadata is kept alive.
3864 // This mirror may be different than the one in clazz field.
3865 set_vmholder(new_resolved_method, holder->java_mirror());
3866
3867 // Set flag in class to indicate this InstanceKlass has entries in the table
3868 // to avoid walking table during redefinition if none of the redefined classes
3869 // have any membernames in the table.
3870 holder->set_has_resolved_methods();
3871
3872 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
3873 }
3874
3875 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3876 assert(is_instance(lform), "wrong type");
3877 return lform->obj_field(_vmentry_offset);
3878 }
3879
3880
3881 // Support for java_lang_invoke_MethodType
3882
3883 int java_lang_invoke_MethodType::_rtype_offset;
3884 int java_lang_invoke_MethodType::_ptypes_offset;
3885
3886 #define METHODTYPE_FIELDS_DO(macro) \
3887 macro(_rtype_offset, k, "rtype", class_signature, false); \
3888 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3889
3890 void java_lang_invoke_MethodType::compute_offsets() {
3891 InstanceKlass* k = SystemDictionary::MethodType_klass();
3892 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3893 }
3894
3895 #if INCLUDE_CDS
3896 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3897 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3898 }
3899 #endif
3900
3901 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3902 st->print("(");
3903 objArrayOop pts = ptypes(mt);
3904 for (int i = 0, limit = pts->length(); i < limit; i++) {
3905 java_lang_Class::print_signature(pts->obj_at(i), st);
3906 }
3907 st->print(")");
3908 java_lang_Class::print_signature(rtype(mt), st);
3909 }
3910
3911 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
3912 ResourceMark rm;
3913 stringStream buffer(128);
3914 print_signature(mt, &buffer);
3915 const char* sigstr = buffer.base();
3916 int siglen = (int) buffer.size();
3917 Symbol *name;
3918 if (!intern_if_not_found) {
3919 name = SymbolTable::probe(sigstr, siglen);
3920 } else {
3921 name = SymbolTable::new_symbol(sigstr, siglen);
3922 }
3923 return name;
3924 }
3925
3926 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3927 if (mt1 == mt2)
3928 return true;
3929 if (rtype(mt1) != rtype(mt2))
3930 return false;
3931 if (ptype_count(mt1) != ptype_count(mt2))
3932 return false;
3933 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3934 if (ptype(mt1, i) != ptype(mt2, i))
3935 return false;
3936 }
3937 return true;
3938 }
3939
3940 oop java_lang_invoke_MethodType::rtype(oop mt) {
3941 assert(is_instance(mt), "must be a MethodType");
3942 return mt->obj_field(_rtype_offset);
3943 }
3944
3945 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3946 assert(is_instance(mt), "must be a MethodType");
3947 return (objArrayOop) mt->obj_field(_ptypes_offset);
3948 }
3949
3950 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3951 return ptypes(mt)->obj_at(idx);
3952 }
3953
3954 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3955 return ptypes(mt)->length();
3956 }
3957
3958 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3959 objArrayOop pts = ptypes(mt);
3960 int count = pts->length();
3961 int slots = 0;
3962 for (int i = 0; i < count; i++) {
3963 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3964 slots += type2size[bt];
3965 }
3966 return slots;
3967 }
3968
3969 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3970 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3971 return type2size[bt];
3972 }
3973
3974
3975 // Support for java_lang_invoke_CallSite
3976
3977 int java_lang_invoke_CallSite::_target_offset;
3978 int java_lang_invoke_CallSite::_context_offset;
3979
3980 #define CALLSITE_FIELDS_DO(macro) \
3981 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3982 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3983
3984 void java_lang_invoke_CallSite::compute_offsets() {
3985 InstanceKlass* k = SystemDictionary::CallSite_klass();
3986 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3987 }
3988
3989 #if INCLUDE_CDS
3990 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3991 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3992 }
3993 #endif
3994
3995 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3996 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3997
3998 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3999 return dep_oop;
4000 }
4001
4002 // Support for java_lang_invoke_ConstantCallSite
4003
4004 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4005
4006 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4007 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4008
4009 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4010 InstanceKlass* k = SystemDictionary::ConstantCallSite_klass();
4011 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4012 }
4013
4014 #if INCLUDE_CDS
4015 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4016 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4017 }
4018 #endif
4019
4020 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4021
4022 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4023 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4024
4025 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4026 InstanceKlass* k = SystemDictionary::Context_klass();
4027 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4028 }
4029
4030 #if INCLUDE_CDS
4031 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4032 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4033 }
4034 #endif
4035
4036 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4037 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4038 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
4039 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
4040 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4041 return dep_ctx;
4042 }
4043
4044 // Support for java_security_AccessControlContext
4045
4046 int java_security_AccessControlContext::_context_offset = 0;
4047 int java_security_AccessControlContext::_privilegedContext_offset = 0;
4048 int java_security_AccessControlContext::_isPrivileged_offset = 0;
4049 int java_security_AccessControlContext::_isAuthorized_offset = -1;
4050
4051 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4052 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4053 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4054 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4055 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4056
4057 void java_security_AccessControlContext::compute_offsets() {
4058 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4059 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
4060 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4061 }
4062
4063 #if INCLUDE_CDS
4064 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4065 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4066 }
4067 #endif
4068
4069 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4070 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4071 // Ensure klass is initialized
4072 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
4073 // Allocate result
4074 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
4075 // Fill in values
4076 result->obj_field_put(_context_offset, context());
4077 result->obj_field_put(_privilegedContext_offset, privileged_context());
4078 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4079 // whitelist AccessControlContexts created by the JVM if present
4080 if (_isAuthorized_offset != -1) {
4081 result->bool_field_put(_isAuthorized_offset, true);
4082 }
4083 return result;
4084 }
4085
4086
4087 // Support for java_lang_ClassLoader
4088
4089 bool java_lang_ClassLoader::offsets_computed = false;
4090 int java_lang_ClassLoader::_loader_data_offset = -1;
4091 int java_lang_ClassLoader::parallelCapable_offset = -1;
4092 int java_lang_ClassLoader::name_offset = -1;
4093 int java_lang_ClassLoader::nameAndId_offset = -1;
4094 int java_lang_ClassLoader::unnamedModule_offset = -1;
4095
4096 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4097 assert(loader != NULL, "loader must not be NULL");
4098 assert(oopDesc::is_oop(loader), "loader must be oop");
4099 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
4100 }
4101
4102 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
4103 assert(loader != NULL, "loader must not be NULL");
4104 assert(oopDesc::is_oop(loader), "loader must be oop");
4105 return RawAccess<>::load_at(loader, _loader_data_offset);
4106 }
4107
4108 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4109 assert(loader != NULL, "loader must not be NULL");
4110 assert(oopDesc::is_oop(loader), "loader must be oop");
4111 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
4112 }
4113
4114 #define CLASSLOADER_FIELDS_DO(macro) \
4115 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4116 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4117 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
4118 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4119 macro(parent_offset, k1, "parent", classloader_signature, false)
4120
4121 void java_lang_ClassLoader::compute_offsets() {
4122 assert(!offsets_computed, "offsets should be initialized only once");
4123 offsets_computed = true;
4124
4125 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
4126 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4127
4128 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4129 }
4130
4131 #if INCLUDE_CDS
4132 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4133 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4134 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4135 }
4136 #endif
4137
4138 oop java_lang_ClassLoader::parent(oop loader) {
4139 assert(is_instance(loader), "loader must be oop");
4140 return loader->obj_field(parent_offset);
4141 }
4142
4143 // Returns the name field of this class loader. If the name field has not
4144 // been set, null will be returned.
4145 oop java_lang_ClassLoader::name(oop loader) {
4146 assert(is_instance(loader), "loader must be oop");
4147 return loader->obj_field(name_offset);
4148 }
4149
4150 // Returns the nameAndId field of this class loader. The format is
4151 // as follows:
4152 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4153 // If the defining loader has no name then <qualified-class-name> @<id>
4154 // If built-in loader, then omit '@<id>' as there is only one instance.
4155 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4156 oop java_lang_ClassLoader::nameAndId(oop loader) {
4157 assert(is_instance(loader), "loader must be oop");
4158 return loader->obj_field(nameAndId_offset);
4159 }
4160
4161 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4162 assert(is_instance(loader), "loader must be oop");
4163 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4164 oop acl = loader;
4165 debug_only(jint loop_count = 0);
4166 // This loop taken verbatim from ClassLoader.java:
4167 do {
4168 acl = parent(acl);
4169 if (cl == acl) {
4170 return true;
4171 }
4172 assert(++loop_count > 0, "loop_count overflow");
4173 } while (acl != NULL);
4174 return false;
4175 }
4176
4177 bool java_lang_ClassLoader::is_instance(oop obj) {
4178 return obj != NULL && is_subclass(obj->klass());
4179 }
4180
4181
4182 // For class loader classes, parallelCapable defined
4183 // based on non-null field
4184 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4185 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4186 if (parallelCapable_offset == -1) {
4187 // Default for backward compatibility is false
4188 return false;
4189 }
4190 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4191 }
4192
4193 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4194 // Fix for 4474172; see evaluation for more details
4195 loader = non_reflection_class_loader(loader);
4196
4197 oop cl = SystemDictionary::java_system_loader();
4198 while(cl != NULL) {
4199 if (cl == loader) return true;
4200 cl = parent(cl);
4201 }
4202 return false;
4203 }
4204
4205 // Return true if this is one of the class loaders associated with
4206 // the generated bytecodes for reflection.
4207 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4208 if (loader != NULL) {
4209 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4210 // This might be null in non-1.4 JDKs
4211 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4212 }
4213 return false;
4214 }
4215
4216 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4217 // See whether this is one of the class loaders associated with
4218 // the generated bytecodes for reflection, and if so, "magically"
4219 // delegate to its parent to prevent class loading from occurring
4220 // in places where applications using reflection didn't expect it.
4221 if (is_reflection_class_loader(loader)) {
4222 return parent(loader);
4223 }
4224 return loader;
4225 }
4226
4227 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4228 assert(is_instance(loader), "loader must be oop");
4229 return loader->obj_field(unnamedModule_offset);
4230 }
4231
4232 // Support for java_lang_System
4233 //
4234 #define SYSTEM_FIELDS_DO(macro) \
4235 macro(static_in_offset, k, "in", input_stream_signature, true); \
4236 macro(static_out_offset, k, "out", print_stream_signature, true); \
4237 macro(static_err_offset, k, "err", print_stream_signature, true); \
4238 macro(static_security_offset, k, "security", security_manager_signature, true)
4239
4240 void java_lang_System::compute_offsets() {
4241 InstanceKlass* k = SystemDictionary::System_klass();
4242 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4243 }
4244
4245 #if INCLUDE_CDS
4246 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4247 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4248 }
4249 #endif
4250
4251 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4252 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4253 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4254
4255 // Support for jdk_internal_misc_UnsafeConstants
4256 //
4257 class UnsafeConstantsFixup : public FieldClosure {
4258 private:
4259 int _address_size;
4260 int _page_size;
4261 bool _big_endian;
4262 bool _use_unaligned_access;
4263 int _data_cache_line_flush_size;
4264 public:
4265 UnsafeConstantsFixup() {
4266 // round up values for all static final fields
4267 _address_size = sizeof(void*);
4268 _page_size = os::vm_page_size();
4269 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4270 _use_unaligned_access = UseUnalignedAccesses;
4271 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4272 }
4273
4274 void do_field(fieldDescriptor* fd) {
4275 oop mirror = fd->field_holder()->java_mirror();
4276 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4277 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4278 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4279 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4280 if (fd->name() == vmSymbols::address_size_name()) {
4281 mirror->int_field_put(fd->offset(), _address_size);
4282 } else if (fd->name() == vmSymbols::page_size_name()) {
4283 mirror->int_field_put(fd->offset(), _page_size);
4284 } else if (fd->name() == vmSymbols::big_endian_name()) {
4285 mirror->bool_field_put(fd->offset(), _big_endian);
4286 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4287 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4288 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4289 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4290 } else {
4291 assert(false, "unexpected UnsafeConstants field");
4292 }
4293 }
4294 };
4295
4296 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4297 UnsafeConstantsFixup fixup;
4298 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4299 }
4300
4301 int java_lang_Class::_klass_offset;
4302 int java_lang_Class::_array_klass_offset;
4303 int java_lang_Class::_oop_size_offset;
4304 int java_lang_Class::_static_oop_field_count_offset;
4305 int java_lang_Class::_class_loader_offset;
4306 int java_lang_Class::_module_offset;
4307 int java_lang_Class::_protection_domain_offset;
4308 int java_lang_Class::_component_mirror_offset;
4309 int java_lang_Class::_inline_mirror_offset;
4310 int java_lang_Class::_indirect_mirror_offset;
4311 int java_lang_Class::_init_lock_offset;
4312 int java_lang_Class::_signers_offset;
4313 int java_lang_Class::_name_offset;
4314 int java_lang_Class::_source_file_offset;
4315 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4316 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4317 int java_lang_Throwable::backtrace_offset;
4318 int java_lang_Throwable::detailMessage_offset;
4319 int java_lang_Throwable::stackTrace_offset;
4320 int java_lang_Throwable::depth_offset;
4321 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4322 int java_lang_reflect_AccessibleObject::override_offset;
4323 int java_lang_reflect_Method::clazz_offset;
4324 int java_lang_reflect_Method::name_offset;
4325 int java_lang_reflect_Method::returnType_offset;
4326 int java_lang_reflect_Method::parameterTypes_offset;
4327 int java_lang_reflect_Method::exceptionTypes_offset;
4328 int java_lang_reflect_Method::slot_offset;
4329 int java_lang_reflect_Method::modifiers_offset;
4330 int java_lang_reflect_Method::signature_offset;
4331 int java_lang_reflect_Method::annotations_offset;
4332 int java_lang_reflect_Method::parameter_annotations_offset;
4333 int java_lang_reflect_Method::annotation_default_offset;
4334 int java_lang_reflect_Constructor::clazz_offset;
4335 int java_lang_reflect_Constructor::parameterTypes_offset;
4336 int java_lang_reflect_Constructor::exceptionTypes_offset;
4337 int java_lang_reflect_Constructor::slot_offset;
4338 int java_lang_reflect_Constructor::modifiers_offset;
4339 int java_lang_reflect_Constructor::signature_offset;
4340 int java_lang_reflect_Constructor::annotations_offset;
4341 int java_lang_reflect_Constructor::parameter_annotations_offset;
4342 int java_lang_reflect_Field::clazz_offset;
4343 int java_lang_reflect_Field::name_offset;
4344 int java_lang_reflect_Field::type_offset;
4345 int java_lang_reflect_Field::slot_offset;
4346 int java_lang_reflect_Field::modifiers_offset;
4347 int java_lang_reflect_Field::signature_offset;
4348 int java_lang_reflect_Field::annotations_offset;
4349 int java_lang_reflect_Parameter::name_offset;
4350 int java_lang_reflect_Parameter::modifiers_offset;
4351 int java_lang_reflect_Parameter::index_offset;
4352 int java_lang_reflect_Parameter::executable_offset;
4353 int java_lang_boxing_object::value_offset;
4354 int java_lang_boxing_object::long_value_offset;
4355 int java_lang_ref_Reference::referent_offset;
4356 int java_lang_ref_Reference::queue_offset;
4357 int java_lang_ref_Reference::next_offset;
4358 int java_lang_ref_Reference::discovered_offset;
4359 int java_lang_ref_SoftReference::timestamp_offset;
4360 int java_lang_ref_SoftReference::static_clock_offset;
4361 int java_lang_ClassLoader::parent_offset;
4362 int java_lang_System::static_in_offset;
4363 int java_lang_System::static_out_offset;
4364 int java_lang_System::static_err_offset;
4365 int java_lang_System::static_security_offset;
4366 int java_lang_StackTraceElement::methodName_offset;
4367 int java_lang_StackTraceElement::fileName_offset;
4368 int java_lang_StackTraceElement::lineNumber_offset;
4369 int java_lang_StackTraceElement::moduleName_offset;
4370 int java_lang_StackTraceElement::moduleVersion_offset;
4371 int java_lang_StackTraceElement::classLoaderName_offset;
4372 int java_lang_StackTraceElement::declaringClass_offset;
4373 int java_lang_StackTraceElement::declaringClassObject_offset;
4374 int java_lang_StackFrameInfo::_memberName_offset;
4375 int java_lang_StackFrameInfo::_bci_offset;
4376 int java_lang_StackFrameInfo::_version_offset;
4377 int java_lang_LiveStackFrameInfo::_monitors_offset;
4378 int java_lang_LiveStackFrameInfo::_locals_offset;
4379 int java_lang_LiveStackFrameInfo::_operands_offset;
4380 int java_lang_LiveStackFrameInfo::_mode_offset;
4381 int java_lang_AssertionStatusDirectives::classes_offset;
4382 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4383 int java_lang_AssertionStatusDirectives::packages_offset;
4384 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4385 int java_lang_AssertionStatusDirectives::deflt_offset;
4386 int java_nio_Buffer::_limit_offset;
4387 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4388 int reflect_ConstantPool::_oop_offset;
4389 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4390 int java_lang_Integer_IntegerCache::_static_cache_offset;
4391 int java_lang_Long_LongCache::_static_cache_offset;
4392 int java_lang_Character_CharacterCache::_static_cache_offset;
4393 int java_lang_Short_ShortCache::_static_cache_offset;
4394 int java_lang_Byte_ByteCache::_static_cache_offset;
4395 int java_lang_Boolean::_static_TRUE_offset;
4396 int java_lang_Boolean::_static_FALSE_offset;
4397 int jdk_internal_vm_jni_SubElementSelector::_arrayElementType_offset;
4398 int jdk_internal_vm_jni_SubElementSelector::_subElementType_offset;
4399 int jdk_internal_vm_jni_SubElementSelector::_offset_offset;
4400 int jdk_internal_vm_jni_SubElementSelector::_isFlattened_offset;
4401 int jdk_internal_vm_jni_SubElementSelector::_isFlattenable_offset;
4402
4403
4404
4405 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4406 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4407 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4408 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4409 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4410 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4411 macro(methodName_offset, k, "methodName", string_signature, false); \
4412 macro(fileName_offset, k, "fileName", string_signature, false); \
4413 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4414
4415 // Support for java_lang_StackTraceElement
4416 void java_lang_StackTraceElement::compute_offsets() {
4417 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4418 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4419 }
4420
4421 #if INCLUDE_CDS
4422 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4423 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4424 }
4425 #endif
4426
4427 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4428 element->obj_field_put(fileName_offset, value);
4429 }
4430
4431 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4432 element->obj_field_put(declaringClass_offset, value);
4433 }
4434
4435 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4436 element->obj_field_put(methodName_offset, value);
4437 }
4438
4439 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4440 element->int_field_put(lineNumber_offset, value);
4441 }
4442
4443 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4444 element->obj_field_put(moduleName_offset, value);
4445 }
4446
4447 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4448 element->obj_field_put(moduleVersion_offset, value);
4449 }
4450
4451 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4452 element->obj_field_put(classLoaderName_offset, value);
4453 }
4454
4455 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4456 element->obj_field_put(declaringClassObject_offset, value);
4457 }
4458
4459 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4460 element->short_field_put(_version_offset, value);
4461 }
4462
4463 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4464 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
4465 element->int_field_put(_bci_offset, value);
4466 }
4467
4468 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4469 element->obj_field_put(_monitors_offset, value);
4470 }
4471
4472 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4473 element->obj_field_put(_locals_offset, value);
4474 }
4475
4476 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4477 element->obj_field_put(_operands_offset, value);
4478 }
4479
4480 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4481 element->int_field_put(_mode_offset, value);
4482 }
4483
4484 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4485 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4486 macro(classes_offset, k, "classes", string_array_signature, false); \
4487 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4488 macro(packages_offset, k, "packages", string_array_signature, false); \
4489 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4490 macro(deflt_offset, k, "deflt", bool_signature, false)
4491
4492 void java_lang_AssertionStatusDirectives::compute_offsets() {
4493 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4494 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4495 }
4496
4497 #if INCLUDE_CDS
4498 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4499 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4500 }
4501 #endif
4502
4503 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4504 o->obj_field_put(classes_offset, val);
4505 }
4506
4507 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4508 o->obj_field_put(classEnabled_offset, val);
4509 }
4510
4511 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4512 o->obj_field_put(packages_offset, val);
4513 }
4514
4515 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4516 o->obj_field_put(packageEnabled_offset, val);
4517 }
4518
4519 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4520 o->bool_field_put(deflt_offset, val);
4521 }
4522
4523
4524 // Support for intrinsification of java.nio.Buffer.checkIndex
4525 int java_nio_Buffer::limit_offset() {
4526 return _limit_offset;
4527 }
4528
4529 #define BUFFER_FIELDS_DO(macro) \
4530 macro(_limit_offset, k, "limit", int_signature, false)
4531
4532 void java_nio_Buffer::compute_offsets() {
4533 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4534 assert(k != NULL, "must be loaded in 1.4+");
4535 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4536 }
4537
4538 #if INCLUDE_CDS
4539 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4540 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4541 }
4542 #endif
4543
4544 #define AOS_FIELDS_DO(macro) \
4545 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4546
4547 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4548 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4549 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4550 }
4551
4552 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4553 assert(_owner_offset != 0, "Must be initialized");
4554 return obj->obj_field(_owner_offset);
4555 }
4556
4557 #if INCLUDE_CDS
4558 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4559 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4560 }
4561 #endif
4562
4563 #define INTEGER_CACHE_FIELDS_DO(macro) \
4564 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4565
4566 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4567 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4568 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4569 }
4570
4571 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4572 oop base = ik->static_field_base_raw();
4573 return objArrayOop(base->obj_field(_static_cache_offset));
4574 }
4575
4576 Symbol* java_lang_Integer_IntegerCache::symbol() {
4577 return vmSymbols::java_lang_Integer_IntegerCache();
4578 }
4579
4580 #if INCLUDE_CDS
4581 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4582 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4583 }
4584 #endif
4585 #undef INTEGER_CACHE_FIELDS_DO
4586
4587 jint java_lang_Integer::value(oop obj) {
4588 jvalue v;
4589 java_lang_boxing_object::get_value(obj, &v);
4590 return v.i;
4591 }
4592
4593 #define LONG_CACHE_FIELDS_DO(macro) \
4594 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4595
4596 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4597 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4598 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4599 }
4600
4601 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4602 oop base = ik->static_field_base_raw();
4603 return objArrayOop(base->obj_field(_static_cache_offset));
4604 }
4605
4606 Symbol* java_lang_Long_LongCache::symbol() {
4607 return vmSymbols::java_lang_Long_LongCache();
4608 }
4609
4610 #if INCLUDE_CDS
4611 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4612 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4613 }
4614 #endif
4615 #undef LONG_CACHE_FIELDS_DO
4616
4617 jlong java_lang_Long::value(oop obj) {
4618 jvalue v;
4619 java_lang_boxing_object::get_value(obj, &v);
4620 return v.j;
4621 }
4622
4623 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4624 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4625
4626 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4627 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4628 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4629 }
4630
4631 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4632 oop base = ik->static_field_base_raw();
4633 return objArrayOop(base->obj_field(_static_cache_offset));
4634 }
4635
4636 Symbol* java_lang_Character_CharacterCache::symbol() {
4637 return vmSymbols::java_lang_Character_CharacterCache();
4638 }
4639
4640 #if INCLUDE_CDS
4641 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4642 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4643 }
4644 #endif
4645 #undef CHARACTER_CACHE_FIELDS_DO
4646
4647 jchar java_lang_Character::value(oop obj) {
4648 jvalue v;
4649 java_lang_boxing_object::get_value(obj, &v);
4650 return v.c;
4651 }
4652
4653 #define SHORT_CACHE_FIELDS_DO(macro) \
4654 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4655
4656 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4657 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4658 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4659 }
4660
4661 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4662 oop base = ik->static_field_base_raw();
4663 return objArrayOop(base->obj_field(_static_cache_offset));
4664 }
4665
4666 Symbol* java_lang_Short_ShortCache::symbol() {
4667 return vmSymbols::java_lang_Short_ShortCache();
4668 }
4669
4670 #if INCLUDE_CDS
4671 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
4672 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4673 }
4674 #endif
4675 #undef SHORT_CACHE_FIELDS_DO
4676
4677 jshort java_lang_Short::value(oop obj) {
4678 jvalue v;
4679 java_lang_boxing_object::get_value(obj, &v);
4680 return v.s;
4681 }
4682
4683 #define BYTE_CACHE_FIELDS_DO(macro) \
4684 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
4685
4686 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
4687 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4688 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4689 }
4690
4691 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
4692 oop base = ik->static_field_base_raw();
4693 return objArrayOop(base->obj_field(_static_cache_offset));
4694 }
4695
4696 Symbol* java_lang_Byte_ByteCache::symbol() {
4697 return vmSymbols::java_lang_Byte_ByteCache();
4698 }
4699
4700 #if INCLUDE_CDS
4701 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
4702 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4703 }
4704 #endif
4705 #undef BYTE_CACHE_FIELDS_DO
4706
4707 #define SUBELEMENT_SELECTOR_FIELDS_DO(macro) \
4708 macro(_arrayElementType_offset, k, "arrayElementType", class_signature, false); \
4709 macro(_subElementType_offset, k, "subElementType", class_signature, false); \
4710 macro(_offset_offset, k, "offset", int_signature, false); \
4711 macro(_isFlattened_offset, k, "isFlattened", bool_signature, false); \
4712 macro(_isFlattenable_offset, k, "isFlattenable", bool_signature, false);
4713
4714 void jdk_internal_vm_jni_SubElementSelector::compute_offsets() {
4715 InstanceKlass* k = SystemDictionary::jdk_internal_vm_jni_SubElementSelector_klass();
4716 SUBELEMENT_SELECTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4717 }
4718
4719 #if INCLUDE_CDS
4720 void jdk_internal_vm_jni_SubElementSelector::serialize_offsets(SerializeClosure* f) {
4721 SUBELEMENT_SELECTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4722 }
4723 #endif
4724 #undef SUBELEMENT_SELECTOR_FIELDS_DO
4725
4726 Symbol* jdk_internal_vm_jni_SubElementSelector::symbol() {
4727 return vmSymbols::jdk_internal_vm_jni_SubElementSelector();
4728 }
4729
4730 oop jdk_internal_vm_jni_SubElementSelector::getArrayElementType(oop obj) {
4731 return obj->obj_field(_arrayElementType_offset);
4732 }
4733
4734 void jdk_internal_vm_jni_SubElementSelector::setArrayElementType(oop obj, oop type) {
4735 obj->obj_field_put(_arrayElementType_offset, type);
4736 }
4737
4738 oop jdk_internal_vm_jni_SubElementSelector::getSubElementType(oop obj) {
4739 return obj->obj_field(_subElementType_offset);
4740 }
4741
4742 void jdk_internal_vm_jni_SubElementSelector::setSubElementType(oop obj, oop type) {
4743 obj->obj_field_put(_subElementType_offset, type);
4744 }
4745
4746 int jdk_internal_vm_jni_SubElementSelector::getOffset(oop obj) {
4747 return obj->int_field(_offset_offset);
4748 }
4749
4750 void jdk_internal_vm_jni_SubElementSelector::setOffset(oop obj, int offset) {
4751 obj->int_field_put(_offset_offset, offset);
4752 }
4753
4754 bool jdk_internal_vm_jni_SubElementSelector::getIsFlattened(oop obj) {
4755 return obj->bool_field(_isFlattened_offset);
4756 }
4757
4758 void jdk_internal_vm_jni_SubElementSelector::setIsFlattened(oop obj, bool b) {
4759 obj->bool_field_put(_isFlattened_offset, b);
4760 }
4761
4762 bool jdk_internal_vm_jni_SubElementSelector::getIsFlattenable(oop obj) {
4763 return obj->bool_field(_isFlattenable_offset);
4764 }
4765
4766 void jdk_internal_vm_jni_SubElementSelector::setIsFlattenable(oop obj, bool b) {
4767 obj->bool_field_put(_isFlattenable_offset, b);
4768 }
4769
4770 jbyte java_lang_Byte::value(oop obj) {
4771 jvalue v;
4772 java_lang_boxing_object::get_value(obj, &v);
4773 return v.b;
4774 }
4775 #define BOOLEAN_FIELDS_DO(macro) \
4776 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
4777 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
4778
4779
4780 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
4781 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4782 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4783 }
4784
4785 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
4786 oop base = ik->static_field_base_raw();
4787 return base->obj_field(_static_TRUE_offset);
4788 }
4789
4790 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
4791 oop base = ik->static_field_base_raw();
4792 return base->obj_field(_static_FALSE_offset);
4793 }
4794
4795 Symbol* java_lang_Boolean::symbol() {
4796 return vmSymbols::java_lang_Boolean();
4797 }
4798
4799 #if INCLUDE_CDS
4800 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
4801 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4802 }
4803 #endif
4804 #undef BOOLEAN_CACHE_FIELDS_DO
4805
4806 jboolean java_lang_Boolean::value(oop obj) {
4807 jvalue v;
4808 java_lang_boxing_object::get_value(obj, &v);
4809 return v.z;
4810 }
4811
4812 static int member_offset(int hardcoded_offset) {
4813 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4814 }
4815
4816 // Compute hard-coded offsets
4817 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4818 // are not available to determine the offset_of_static_fields.
4819 void JavaClasses::compute_hard_coded_offsets() {
4820
4821 // java_lang_boxing_object
4822 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4823 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4824
4825 // java_lang_ref_Reference
4826 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4827 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4828 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4829 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4830 }
4831
4832 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4833
4834 // Compute non-hard-coded field offsets of all the classes in this file
4835 void JavaClasses::compute_offsets() {
4836 if (UseSharedSpaces) {
4837 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4838 JvmtiExport::has_early_class_hook_env()),
4839 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4840 // None of the classes used by the rest of this function can be replaced by
4841 // JMVTI ClassFileLoadHook.
4842 // We are safe to use the archived offsets, which have already been restored
4843 // by JavaClasses::serialize_offsets, without computing the offsets again.
4844 return;
4845 }
4846
4847 // We have already called the compute_offsets() of the
4848 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4849 // earlier inside SystemDictionary::resolve_well_known_classes()
4850 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4851 }
4852
4853 #if INCLUDE_CDS
4854 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4855
4856 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4857 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4858 }
4859 #endif
4860
4861 #if INCLUDE_CDS_JAVA_HEAP
4862 bool JavaClasses::is_supported_for_archiving(oop obj) {
4863 Klass* klass = obj->klass();
4864
4865 if (klass == SystemDictionary::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed.
4866 klass == SystemDictionary::Module_klass() || // Module::module_entry is malloc'ed
4867 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
4868 // regular Java code. The implementation of java.lang.invoke uses generated anonymoys classes
4869 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
4870 // So for now we cannot not support these classes for archiving.
4871 //
4872 // These objects typically are not referenced by static fields, but rather by resolved
4873 // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
4874 klass == SystemDictionary::ResolvedMethodName_klass() ||
4875 klass == SystemDictionary::MemberName_klass() ||
4876 klass == SystemDictionary::Context_klass()) {
4877 return false;
4878 }
4879
4880 return true;
4881 }
4882 #endif
4883
4884 #ifndef PRODUCT
4885
4886 // These functions exist to assert the validity of hard-coded field offsets to guard
4887 // against changes in the class files
4888
4889 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4890 EXCEPTION_MARK;
4891 fieldDescriptor fd;
4892 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
4893 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4894 InstanceKlass* ik = InstanceKlass::cast(k);
4895 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
4896 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
4897 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4898 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4899 return false;
4900 }
4901 if (fd.is_static()) {
4902 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4903 return false;
4904 }
4905 if (fd.offset() == hardcoded_offset ) {
4906 return true;
4907 } else {
4908 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4909 klass_name, field_name, hardcoded_offset, fd.offset());
4910 return false;
4911 }
4912 }
4913
4914 // Check the hard-coded field offsets of all the classes in this file
4915
4916 void JavaClasses::check_offsets() {
4917 bool valid = true;
4918
4919 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4920 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4921
4922 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4923 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4924
4925 // Boxed primitive objects (java_lang_boxing_object)
4926
4927 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4928 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4929 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4930 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4931 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4932 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4933 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4934 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4935
4936 // java.lang.ref.Reference
4937
4938 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4939 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4940 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4941 // Fake field
4942 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4943
4944 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4945 }
4946
4947 #endif // PRODUCT
4948
4949 int InjectedField::compute_offset() {
4950 InstanceKlass* ik = InstanceKlass::cast(klass());
4951 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4952 if (!may_be_java && !fs.access_flags().is_internal()) {
4953 // Only look at injected fields
4954 continue;
4955 }
4956 if (fs.name() == name() && fs.signature() == signature()) {
4957 return fs.offset();
4958 }
4959 }
4960 ResourceMark rm;
4961 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)" : "");
4962 #ifndef PRODUCT
4963 ik->print();
4964 tty->print_cr("all fields:");
4965 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4966 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4967 }
4968 #endif //PRODUCT
4969 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4970 return -1;
4971 }
4972
4973 void javaClasses_init() {
4974 JavaClasses::compute_offsets();
4975 JavaClasses::check_offsets();
4976 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4977 }