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