Mon, 12 Aug 2019 18:30:40 +0300
8223147: JFR Backport
8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling
8202835: jfr/event/os/TestSystemProcess.java fails on missing events
Summary: Backport JFR from JDK11. Initial integration
Reviewed-by: neugens
1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/javaClasses.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/debugInfo.hpp"
31 #include "code/pcDesc.hpp"
32 #include "compiler/compilerOracle.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/fieldStreams.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/instanceMirrorKlass.hpp"
40 #include "oops/klass.hpp"
41 #include "oops/method.hpp"
42 #include "oops/symbol.hpp"
43 #include "oops/typeArrayOop.hpp"
44 #include "prims/jvmtiRedefineClassesTrace.hpp"
45 #include "runtime/fieldDescriptor.hpp"
46 #include "runtime/handles.inline.hpp"
47 #include "runtime/interfaceSupport.hpp"
48 #include "runtime/java.hpp"
49 #include "runtime/javaCalls.hpp"
50 #include "runtime/safepoint.hpp"
51 #include "runtime/thread.inline.hpp"
52 #include "runtime/vframe.hpp"
53 #include "utilities/preserveException.hpp"
55 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
57 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
58 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
60 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
61 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
63 InjectedField JavaClasses::_injected_fields[] = {
64 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
65 };
67 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
68 return _injected_fields[id].compute_offset();
69 }
72 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
73 *field_count = 0;
75 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
76 if (sid == vmSymbols::NO_SID) {
77 // Only well known classes can inject fields
78 return NULL;
79 }
81 int count = 0;
82 int start = -1;
84 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
85 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
86 count++; \
87 if (start == -1) start = klass##_##name##_enum; \
88 }
89 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
90 #undef LOOKUP_INJECTED_FIELD
92 if (start != -1) {
93 *field_count = count;
94 return _injected_fields + start;
95 }
96 return NULL;
97 }
100 static bool find_field(InstanceKlass* ik,
101 Symbol* name_symbol, Symbol* signature_symbol,
102 fieldDescriptor* fd,
103 bool allow_super = false) {
104 if (allow_super)
105 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
106 else
107 return ik->find_local_field(name_symbol, signature_symbol, fd);
108 }
110 // Helpful routine for computing field offsets at run time rather than hardcoding them
111 static void
112 compute_offset(int &dest_offset,
113 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
114 bool allow_super = false) {
115 fieldDescriptor fd;
116 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
117 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
118 ResourceMark rm;
119 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
120 #ifndef PRODUCT
121 klass_oop->print();
122 tty->print_cr("all fields:");
123 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
124 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
125 }
126 #endif //PRODUCT
127 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
128 }
129 dest_offset = fd.offset();
130 }
132 // Same as above but for "optional" offsets that might not be present in certain JDK versions
133 static void
134 compute_optional_offset(int& dest_offset,
135 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
136 bool allow_super = false) {
137 fieldDescriptor fd;
138 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
139 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
140 dest_offset = fd.offset();
141 }
142 }
145 int java_lang_String::value_offset = 0;
146 int java_lang_String::offset_offset = 0;
147 int java_lang_String::count_offset = 0;
148 int java_lang_String::hash_offset = 0;
150 bool java_lang_String::initialized = false;
152 void java_lang_String::compute_offsets() {
153 assert(!initialized, "offsets should be initialized only once");
155 Klass* k = SystemDictionary::String_klass();
156 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
157 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
158 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
159 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
161 initialized = true;
162 }
164 Handle java_lang_String::basic_create(int length, TRAPS) {
165 assert(initialized, "Must be initialized");
166 // Create the String object first, so there's a chance that the String
167 // and the char array it points to end up in the same cache line.
168 oop obj;
169 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
171 // Create the char array. The String object must be handlized here
172 // because GC can happen as a result of the allocation attempt.
173 Handle h_obj(THREAD, obj);
174 typeArrayOop buffer;
175 buffer = oopFactory::new_charArray(length, CHECK_NH);
177 // Point the String at the char array
178 obj = h_obj();
179 set_value(obj, buffer);
180 // No need to zero the offset, allocation zero'ed the entire String object
181 assert(offset(obj) == 0, "initial String offset should be zero");
182 //set_offset(obj, 0);
183 set_count(obj, length);
185 return h_obj;
186 }
188 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
189 Handle h_obj = basic_create(length, CHECK_NH);
190 typeArrayOop buffer = value(h_obj());
191 for (int index = 0; index < length; index++) {
192 buffer->char_at_put(index, unicode[index]);
193 }
194 return h_obj;
195 }
197 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
198 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
199 return h_obj();
200 }
202 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
203 if (utf8_str == NULL) {
204 return Handle();
205 }
206 int length = UTF8::unicode_length(utf8_str);
207 Handle h_obj = basic_create(length, CHECK_NH);
208 if (length > 0) {
209 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
210 }
211 return h_obj;
212 }
214 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
215 Handle h_obj = create_from_str(utf8_str, CHECK_0);
216 return h_obj();
217 }
219 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
220 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
221 Handle h_obj = basic_create(length, CHECK_NH);
222 if (length > 0) {
223 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
224 }
225 return h_obj;
226 }
228 // Converts a C string to a Java String based on current encoding
229 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
230 assert(str != NULL, "bad arguments");
232 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
233 static to_java_string_fn_t _to_java_string_fn = NULL;
235 if (_to_java_string_fn == NULL) {
236 void *lib_handle = os::native_java_library();
237 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
238 if (_to_java_string_fn == NULL) {
239 fatal("NewStringPlatform missing");
240 }
241 }
243 jstring js = NULL;
244 { JavaThread* thread = (JavaThread*)THREAD;
245 assert(thread->is_Java_thread(), "must be java thread");
246 HandleMark hm(thread);
247 ThreadToNativeFromVM ttn(thread);
248 js = (_to_java_string_fn)(thread->jni_environment(), str);
249 }
250 return Handle(THREAD, JNIHandles::resolve(js));
251 }
253 // Converts a Java String to a native C string that can be used for
254 // native OS calls.
255 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
257 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
258 static to_platform_string_fn_t _to_platform_string_fn = NULL;
260 if (_to_platform_string_fn == NULL) {
261 void *lib_handle = os::native_java_library();
262 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
263 if (_to_platform_string_fn == NULL) {
264 fatal("GetStringPlatformChars missing");
265 }
266 }
268 char *native_platform_string;
269 { JavaThread* thread = (JavaThread*)THREAD;
270 assert(thread->is_Java_thread(), "must be java thread");
271 JNIEnv *env = thread->jni_environment();
272 jstring js = (jstring) JNIHandles::make_local(env, java_string());
273 bool is_copy;
274 HandleMark hm(thread);
275 ThreadToNativeFromVM ttn(thread);
276 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
277 assert(is_copy == JNI_TRUE, "is_copy value changed");
278 JNIHandles::destroy_local(js);
279 }
280 return native_platform_string;
281 }
283 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
284 oop obj = java_string();
285 // Typical usage is to convert all '/' to '.' in string.
286 typeArrayOop value = java_lang_String::value(obj);
287 int offset = java_lang_String::offset(obj);
288 int length = java_lang_String::length(obj);
290 // First check if any from_char exist
291 int index; // Declared outside, used later
292 for (index = 0; index < length; index++) {
293 if (value->char_at(index + offset) == from_char) {
294 break;
295 }
296 }
297 if (index == length) {
298 // No from_char, so do not copy.
299 return java_string;
300 }
302 // Create new UNICODE buffer. Must handlize value because GC
303 // may happen during String and char array creation.
304 typeArrayHandle h_value(THREAD, value);
305 Handle string = basic_create(length, CHECK_NH);
307 typeArrayOop from_buffer = h_value();
308 typeArrayOop to_buffer = java_lang_String::value(string());
310 // Copy contents
311 for (index = 0; index < length; index++) {
312 jchar c = from_buffer->char_at(index + offset);
313 if (c == from_char) {
314 c = to_char;
315 }
316 to_buffer->char_at_put(index, c);
317 }
318 return string;
319 }
321 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
322 typeArrayOop value = java_lang_String::value(java_string);
323 int offset = java_lang_String::offset(java_string);
324 length = java_lang_String::length(java_string);
326 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
327 if (result != NULL) {
328 for (int index = 0; index < length; index++) {
329 result[index] = value->char_at(index + offset);
330 }
331 } else {
332 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
333 }
334 return result;
335 }
337 unsigned int java_lang_String::hash_code(oop java_string) {
338 int length = java_lang_String::length(java_string);
339 // Zero length string will hash to zero with String.hashCode() function.
340 if (length == 0) return 0;
342 typeArrayOop value = java_lang_String::value(java_string);
343 int offset = java_lang_String::offset(java_string);
344 return java_lang_String::hash_code(value->char_at_addr(offset), length);
345 }
347 char* java_lang_String::as_quoted_ascii(oop java_string) {
348 typeArrayOop value = java_lang_String::value(java_string);
349 int offset = java_lang_String::offset(java_string);
350 int length = java_lang_String::length(java_string);
352 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
353 if (base == NULL) return NULL;
355 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
356 char* result = NEW_RESOURCE_ARRAY(char, result_length);
357 UNICODE::as_quoted_ascii(base, length, result, result_length);
358 assert(result_length >= length + 1, "must not be shorter");
359 assert(result_length == (int)strlen(result) + 1, "must match");
360 return result;
361 }
363 unsigned int java_lang_String::hash_string(oop java_string) {
364 int length = java_lang_String::length(java_string);
365 // Zero length string doesn't hash necessarily hash to zero.
366 if (length == 0) {
367 return StringTable::hash_string(NULL, 0);
368 }
370 typeArrayOop value = java_lang_String::value(java_string);
371 int offset = java_lang_String::offset(java_string);
372 return StringTable::hash_string(value->char_at_addr(offset), length);
373 }
375 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
376 oop obj = java_string();
377 typeArrayOop value = java_lang_String::value(obj);
378 int offset = java_lang_String::offset(obj);
379 int length = java_lang_String::length(obj);
380 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
381 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
382 return sym;
383 }
385 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
386 typeArrayOop value = java_lang_String::value(java_string);
387 int offset = java_lang_String::offset(java_string);
388 int length = java_lang_String::length(java_string);
389 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
390 return SymbolTable::probe_unicode(base, length);
391 }
394 int java_lang_String::utf8_length(oop java_string) {
395 typeArrayOop value = java_lang_String::value(java_string);
396 int offset = java_lang_String::offset(java_string);
397 int length = java_lang_String::length(java_string);
398 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
399 return UNICODE::utf8_length(position, length);
400 }
402 char* java_lang_String::as_utf8_string(oop java_string) {
403 typeArrayOop value = java_lang_String::value(java_string);
404 int offset = java_lang_String::offset(java_string);
405 int length = java_lang_String::length(java_string);
406 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
407 return UNICODE::as_utf8(position, length);
408 }
410 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
411 typeArrayOop value = java_lang_String::value(java_string);
412 int offset = java_lang_String::offset(java_string);
413 int length = java_lang_String::length(java_string);
414 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
415 return UNICODE::as_utf8(position, length, buf, buflen);
416 }
418 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
419 typeArrayOop value = java_lang_String::value(java_string);
420 int offset = java_lang_String::offset(java_string);
421 int length = java_lang_String::length(java_string);
422 assert(start + len <= length, "just checking");
423 jchar* position = value->char_at_addr(offset + start);
424 return UNICODE::as_utf8(position, len);
425 }
427 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
428 assert(java_string->klass() == SystemDictionary::String_klass(),
429 "must be java_string");
430 typeArrayOop value = java_lang_String::value(java_string);
431 int offset = java_lang_String::offset(java_string);
432 int length = java_lang_String::length(java_string);
433 if (length != len) {
434 return false;
435 }
436 for (int i = 0; i < len; i++) {
437 if (value->char_at(i + offset) != chars[i]) {
438 return false;
439 }
440 }
441 return true;
442 }
444 bool java_lang_String::equals(oop str1, oop str2) {
445 assert(str1->klass() == SystemDictionary::String_klass(),
446 "must be java String");
447 assert(str2->klass() == SystemDictionary::String_klass(),
448 "must be java String");
449 typeArrayOop value1 = java_lang_String::value(str1);
450 int offset1 = java_lang_String::offset(str1);
451 int length1 = java_lang_String::length(str1);
452 typeArrayOop value2 = java_lang_String::value(str2);
453 int offset2 = java_lang_String::offset(str2);
454 int length2 = java_lang_String::length(str2);
456 if (length1 != length2) {
457 return false;
458 }
459 for (int i = 0; i < length1; i++) {
460 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
461 return false;
462 }
463 }
464 return true;
465 }
467 void java_lang_String::print(oop java_string, outputStream* st) {
468 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
469 typeArrayOop value = java_lang_String::value(java_string);
470 int offset = java_lang_String::offset(java_string);
471 int length = java_lang_String::length(java_string);
473 int end = MIN2(length, 100);
474 if (value == NULL) {
475 // This can happen if, e.g., printing a String
476 // object before its initializer has been called
477 st->print_cr("NULL");
478 } else {
479 st->print("\"");
480 for (int index = 0; index < length; index++) {
481 st->print("%c", value->char_at(index + offset));
482 }
483 st->print("\"");
484 }
485 }
488 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
489 assert(mirror.not_null() && fd->is_static(), "just checking");
490 if (fd->has_initial_value()) {
491 BasicType t = fd->field_type();
492 switch (t) {
493 case T_BYTE:
494 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
495 break;
496 case T_BOOLEAN:
497 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
498 break;
499 case T_CHAR:
500 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
501 break;
502 case T_SHORT:
503 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
504 break;
505 case T_INT:
506 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
507 break;
508 case T_FLOAT:
509 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
510 break;
511 case T_DOUBLE:
512 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
513 break;
514 case T_LONG:
515 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
516 break;
517 case T_OBJECT:
518 {
519 #ifdef ASSERT
520 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
521 assert(fd->signature() == sym, "just checking");
522 #endif
523 oop string = fd->string_initial_value(CHECK);
524 mirror()->obj_field_put(fd->offset(), string);
525 }
526 break;
527 default:
528 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
529 "Illegal ConstantValue attribute in class file");
530 }
531 }
532 }
535 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
536 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
538 // If the offset was read from the shared archive, it was fixed up already
539 if (!k->is_shared()) {
540 if (k->oop_is_instance()) {
541 // During bootstrap, java.lang.Class wasn't loaded so static field
542 // offsets were computed without the size added it. Go back and
543 // update all the static field offsets to included the size.
544 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
545 if (fs.access_flags().is_static()) {
546 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
547 fs.set_offset(real_offset);
548 }
549 }
550 }
551 }
552 create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
553 }
555 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
556 Handle mirror,
557 Handle protection_domain,
558 TRAPS) {
559 // Allocate a simple java object for a lock.
560 // This needs to be a java object because during class initialization
561 // it can be held across a java call.
562 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
563 set_init_lock(mirror(), r);
565 // Set protection domain also
566 set_protection_domain(mirror(), protection_domain());
568 // Initialize static fields
569 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
570 }
572 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
573 Handle protection_domain, TRAPS) {
574 assert(k->java_mirror() == NULL, "should only assign mirror once");
575 // Use this moment of initialization to cache modifier_flags also,
576 // to support Class.getModifiers(). Instance classes recalculate
577 // the cached flags after the class file is parsed, but before the
578 // class is put into the system dictionary.
579 int computed_modifiers = k->compute_modifier_flags(CHECK);
580 k->set_modifier_flags(computed_modifiers);
581 // Class_klass has to be loaded because it is used to allocate
582 // the mirror.
583 if (SystemDictionary::Class_klass_loaded()) {
584 // Allocate mirror (java.lang.Class instance)
585 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
587 // Setup indirection from mirror->klass
588 if (!k.is_null()) {
589 java_lang_Class::set_klass(mirror(), k());
590 }
592 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
593 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
595 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
597 // It might also have a component mirror. This mirror must already exist.
598 if (k->oop_is_array()) {
599 Handle comp_mirror;
600 if (k->oop_is_typeArray()) {
601 BasicType type = TypeArrayKlass::cast(k())->element_type();
602 comp_mirror = Universe::java_mirror(type);
603 } else {
604 assert(k->oop_is_objArray(), "Must be");
605 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
606 assert(element_klass != NULL, "Must have an element klass");
607 comp_mirror = element_klass->java_mirror();
608 }
609 assert(comp_mirror.not_null(), "must have a mirror");
611 // Two-way link between the array klass and its component mirror:
612 ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
613 set_array_klass(comp_mirror(), k());
614 } else {
615 assert(k->oop_is_instance(), "Must be");
617 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
618 if (HAS_PENDING_EXCEPTION) {
619 // If any of the fields throws an exception like OOM remove the klass field
620 // from the mirror so GC doesn't follow it after the klass has been deallocated.
621 // This mirror looks like a primitive type, which logically it is because it
622 // it represents no class.
623 java_lang_Class::set_klass(mirror(), NULL);
624 return;
625 }
626 }
628 // set the classLoader field in the java_lang_Class instance
629 assert(class_loader() == k->class_loader(), "should be same");
630 set_class_loader(mirror(), class_loader());
632 // Setup indirection from klass->mirror last
633 // after any exceptions can happen during allocations.
634 if (!k.is_null()) {
635 k->set_java_mirror(mirror());
636 }
637 } else {
638 if (fixup_mirror_list() == NULL) {
639 GrowableArray<Klass*>* list =
640 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
641 set_fixup_mirror_list(list);
642 }
643 fixup_mirror_list()->push(k());
644 }
645 }
648 int java_lang_Class::oop_size(oop java_class) {
649 assert(_oop_size_offset != 0, "must be set");
650 return java_class->int_field(_oop_size_offset);
651 }
652 void java_lang_Class::set_oop_size(oop java_class, int size) {
653 assert(_oop_size_offset != 0, "must be set");
654 java_class->int_field_put(_oop_size_offset, size);
655 }
656 int java_lang_Class::static_oop_field_count(oop java_class) {
657 assert(_static_oop_field_count_offset != 0, "must be set");
658 return java_class->int_field(_static_oop_field_count_offset);
659 }
660 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
661 assert(_static_oop_field_count_offset != 0, "must be set");
662 java_class->int_field_put(_static_oop_field_count_offset, size);
663 }
665 oop java_lang_Class::protection_domain(oop java_class) {
666 assert(_protection_domain_offset != 0, "must be set");
667 return java_class->obj_field(_protection_domain_offset);
668 }
669 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
670 assert(_protection_domain_offset != 0, "must be set");
671 java_class->obj_field_put(_protection_domain_offset, pd);
672 }
674 oop java_lang_Class::init_lock(oop java_class) {
675 assert(_init_lock_offset != 0, "must be set");
676 return java_class->obj_field(_init_lock_offset);
677 }
678 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
679 assert(_init_lock_offset != 0, "must be set");
680 java_class->obj_field_put(_init_lock_offset, init_lock);
681 }
683 objArrayOop java_lang_Class::signers(oop java_class) {
684 assert(_signers_offset != 0, "must be set");
685 return (objArrayOop)java_class->obj_field(_signers_offset);
686 }
687 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
688 assert(_signers_offset != 0, "must be set");
689 java_class->obj_field_put(_signers_offset, (oop)signers);
690 }
693 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
694 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
695 if (_class_loader_offset != 0) {
696 java_class->obj_field_put(_class_loader_offset, loader);
697 }
698 }
700 oop java_lang_Class::class_loader(oop java_class) {
701 assert(_class_loader_offset != 0, "must be set");
702 return java_class->obj_field(_class_loader_offset);
703 }
705 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
706 // This should be improved by adding a field at the Java level or by
707 // introducing a new VM klass (see comment in ClassFileParser)
708 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
709 if (type != T_VOID) {
710 Klass* aklass = Universe::typeArrayKlassObj(type);
711 assert(aklass != NULL, "correct bootstrap");
712 set_array_klass(java_class, aklass);
713 }
714 #ifdef ASSERT
715 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
716 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
717 #endif
718 return java_class;
719 }
722 Klass* java_lang_Class::as_Klass(oop java_class) {
723 //%note memory_2
724 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
725 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
726 assert(k == NULL || k->is_klass(), "type check");
727 return k;
728 }
731 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
732 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
733 java_class->metadata_field_put(_klass_offset, klass);
734 }
737 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
738 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
739 Symbol* name = NULL;
740 bool is_instance = false;
741 if (is_primitive(java_class)) {
742 name = vmSymbols::type_signature(primitive_type(java_class));
743 } else {
744 Klass* k = as_Klass(java_class);
745 is_instance = k->oop_is_instance();
746 name = k->name();
747 }
748 if (name == NULL) {
749 st->print("<null>");
750 return;
751 }
752 if (is_instance) st->print("L");
753 st->write((char*) name->base(), (int) name->utf8_length());
754 if (is_instance) st->print(";");
755 }
757 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
758 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
759 Symbol* name;
760 if (is_primitive(java_class)) {
761 name = vmSymbols::type_signature(primitive_type(java_class));
762 // Because this can create a new symbol, the caller has to decrement
763 // the refcount, so make adjustment here and below for symbols returned
764 // that are not created or incremented due to a successful lookup.
765 name->increment_refcount();
766 } else {
767 Klass* k = as_Klass(java_class);
768 if (!k->oop_is_instance()) {
769 name = k->name();
770 name->increment_refcount();
771 } else {
772 ResourceMark rm;
773 const char* sigstr = k->signature_name();
774 int siglen = (int) strlen(sigstr);
775 if (!intern_if_not_found) {
776 name = SymbolTable::probe(sigstr, siglen);
777 } else {
778 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
779 }
780 }
781 }
782 return name;
783 }
785 // Returns the Java name for this Java mirror (Resource allocated)
786 // See Klass::external_name().
787 // For primitive type Java mirrors, its type name is returned.
788 const char* java_lang_Class::as_external_name(oop java_class) {
789 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
790 const char* name = NULL;
791 if (is_primitive(java_class)) {
792 name = type2name(primitive_type(java_class));
793 } else {
794 name = as_Klass(java_class)->external_name();
795 }
796 if (name == NULL) {
797 name = "<null>";
798 }
799 return name;
800 }
802 Klass* java_lang_Class::array_klass(oop java_class) {
803 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
804 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
805 return k;
806 }
809 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
810 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
811 java_class->metadata_field_put(_array_klass_offset, klass);
812 }
815 bool java_lang_Class::is_primitive(oop java_class) {
816 // should assert:
817 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
818 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
820 #ifdef ASSERT
821 if (is_primitive) {
822 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
823 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
824 "Should be either the T_VOID primitive or a java primitive");
825 }
826 #endif
828 return is_primitive;
829 }
832 BasicType java_lang_Class::primitive_type(oop java_class) {
833 assert(java_lang_Class::is_primitive(java_class), "just checking");
834 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
835 BasicType type = T_VOID;
836 if (ak != NULL) {
837 // Note: create_basic_type_mirror above initializes ak to a non-null value.
838 type = ArrayKlass::cast(ak)->element_type();
839 } else {
840 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
841 }
842 assert(Universe::java_mirror(type) == java_class, "must be consistent");
843 return type;
844 }
846 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
847 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
848 if (is_primitive(java_class)) {
849 if (reference_klass != NULL)
850 (*reference_klass) = NULL;
851 return primitive_type(java_class);
852 } else {
853 if (reference_klass != NULL)
854 (*reference_klass) = as_Klass(java_class);
855 return T_OBJECT;
856 }
857 }
860 oop java_lang_Class::primitive_mirror(BasicType t) {
861 oop mirror = Universe::java_mirror(t);
862 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
863 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
864 return mirror;
865 }
867 bool java_lang_Class::offsets_computed = false;
868 int java_lang_Class::classRedefinedCount_offset = -1;
870 void java_lang_Class::compute_offsets() {
871 assert(!offsets_computed, "offsets should be initialized only once");
872 offsets_computed = true;
874 Klass* klass_oop = SystemDictionary::Class_klass();
875 // The classRedefinedCount field is only present starting in 1.5,
876 // so don't go fatal.
877 compute_optional_offset(classRedefinedCount_offset,
878 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
880 // Needs to be optional because the old build runs Queens during bootstrapping
881 // and jdk8-9 doesn't have coordinated pushes yet.
882 compute_optional_offset(_class_loader_offset,
883 klass_oop, vmSymbols::classLoader_name(),
884 vmSymbols::classloader_signature());
886 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
887 }
889 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
890 if (!JDK_Version::is_gte_jdk15x_version()
891 || classRedefinedCount_offset == -1) {
892 // The classRedefinedCount field is only present starting in 1.5.
893 // If we don't have an offset for it then just return -1 as a marker.
894 return -1;
895 }
897 return the_class_mirror->int_field(classRedefinedCount_offset);
898 }
900 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
901 if (!JDK_Version::is_gte_jdk15x_version()
902 || classRedefinedCount_offset == -1) {
903 // The classRedefinedCount field is only present starting in 1.5.
904 // If we don't have an offset for it then nothing to set.
905 return;
906 }
908 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
909 }
912 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
913 // platform thread structure, and a eetop offset which was used for thread
914 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
915 // merged, so in the HotSpot VM we just use the eetop field for the thread
916 // instead of the privateInfo_offset.
917 //
918 // Note: The stackSize field is only present starting in 1.4.
920 int java_lang_Thread::_name_offset = 0;
921 int java_lang_Thread::_group_offset = 0;
922 int java_lang_Thread::_contextClassLoader_offset = 0;
923 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
924 int java_lang_Thread::_priority_offset = 0;
925 int java_lang_Thread::_eetop_offset = 0;
926 int java_lang_Thread::_daemon_offset = 0;
927 int java_lang_Thread::_stillborn_offset = 0;
928 int java_lang_Thread::_stackSize_offset = 0;
929 int java_lang_Thread::_tid_offset = 0;
930 int java_lang_Thread::_thread_status_offset = 0;
931 int java_lang_Thread::_park_blocker_offset = 0;
932 int java_lang_Thread::_park_event_offset = 0 ;
935 void java_lang_Thread::compute_offsets() {
936 assert(_group_offset == 0, "offsets should be initialized only once");
938 Klass* k = SystemDictionary::Thread_klass();
939 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
940 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
941 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
942 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
943 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
944 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
945 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
946 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
947 // The stackSize field is only present starting in 1.4, so don't go fatal.
948 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
949 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
950 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
951 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
952 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
953 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
954 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
955 vmSymbols::long_signature());
956 }
959 JavaThread* java_lang_Thread::thread(oop java_thread) {
960 return (JavaThread*)java_thread->address_field(_eetop_offset);
961 }
964 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
965 java_thread->address_field_put(_eetop_offset, (address)thread);
966 }
969 oop java_lang_Thread::name(oop java_thread) {
970 return java_thread->obj_field(_name_offset);
971 }
974 void java_lang_Thread::set_name(oop java_thread, oop name) {
975 java_thread->obj_field_put(_name_offset, name);
976 }
979 ThreadPriority java_lang_Thread::priority(oop java_thread) {
980 return (ThreadPriority)java_thread->int_field(_priority_offset);
981 }
984 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
985 java_thread->int_field_put(_priority_offset, priority);
986 }
989 oop java_lang_Thread::threadGroup(oop java_thread) {
990 return java_thread->obj_field(_group_offset);
991 }
994 bool java_lang_Thread::is_stillborn(oop java_thread) {
995 return java_thread->bool_field(_stillborn_offset) != 0;
996 }
999 // We never have reason to turn the stillborn bit off
1000 void java_lang_Thread::set_stillborn(oop java_thread) {
1001 java_thread->bool_field_put(_stillborn_offset, true);
1002 }
1005 bool java_lang_Thread::is_alive(oop java_thread) {
1006 JavaThread* thr = java_lang_Thread::thread(java_thread);
1007 return (thr != NULL);
1008 }
1011 bool java_lang_Thread::is_daemon(oop java_thread) {
1012 return java_thread->bool_field(_daemon_offset) != 0;
1013 }
1016 void java_lang_Thread::set_daemon(oop java_thread) {
1017 java_thread->bool_field_put(_daemon_offset, true);
1018 }
1020 oop java_lang_Thread::context_class_loader(oop java_thread) {
1021 return java_thread->obj_field(_contextClassLoader_offset);
1022 }
1024 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1025 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1026 }
1029 jlong java_lang_Thread::stackSize(oop java_thread) {
1030 // The stackSize field is only present starting in 1.4
1031 if (_stackSize_offset > 0) {
1032 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
1033 return java_thread->long_field(_stackSize_offset);
1034 } else {
1035 return 0;
1036 }
1037 }
1039 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1040 void java_lang_Thread::set_thread_status(oop java_thread,
1041 java_lang_Thread::ThreadStatus status) {
1042 // The threadStatus is only present starting in 1.5
1043 if (_thread_status_offset > 0) {
1044 java_thread->int_field_put(_thread_status_offset, status);
1045 }
1046 }
1048 // Read thread status value from threadStatus field in java.lang.Thread java class.
1049 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1050 assert(Threads_lock->owned_by_self() || Thread::current()->is_Watcher_thread() ||
1051 Thread::current()->is_VM_thread() ||
1052 JavaThread::current()->thread_state() == _thread_in_vm,
1053 "Java Thread is not running in vm");
1054 // The threadStatus is only present starting in 1.5
1055 if (_thread_status_offset > 0) {
1056 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1057 } else {
1058 // All we can easily figure out is if it is alive, but that is
1059 // enough info for a valid unknown status.
1060 // These aren't restricted to valid set ThreadStatus values, so
1061 // use JVMTI values and cast.
1062 JavaThread* thr = java_lang_Thread::thread(java_thread);
1063 if (thr == NULL) {
1064 // the thread hasn't run yet or is in the process of exiting
1065 return NEW;
1066 }
1067 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1068 }
1069 }
1072 jlong java_lang_Thread::thread_id(oop java_thread) {
1073 // The thread ID field is only present starting in 1.5
1074 if (_tid_offset > 0) {
1075 return java_thread->long_field(_tid_offset);
1076 } else {
1077 return 0;
1078 }
1079 }
1081 oop java_lang_Thread::park_blocker(oop java_thread) {
1082 assert(JDK_Version::current().supports_thread_park_blocker() &&
1083 _park_blocker_offset != 0, "Must support parkBlocker field");
1085 if (_park_blocker_offset > 0) {
1086 return java_thread->obj_field(_park_blocker_offset);
1087 }
1089 return NULL;
1090 }
1092 jlong java_lang_Thread::park_event(oop java_thread) {
1093 if (_park_event_offset > 0) {
1094 return java_thread->long_field(_park_event_offset);
1095 }
1096 return 0;
1097 }
1099 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1100 if (_park_event_offset > 0) {
1101 java_thread->long_field_put(_park_event_offset, ptr);
1102 return true;
1103 }
1104 return false;
1105 }
1108 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1109 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1110 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1111 switch (status) {
1112 case NEW : return "NEW";
1113 case RUNNABLE : return "RUNNABLE";
1114 case SLEEPING : return "TIMED_WAITING (sleeping)";
1115 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1116 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1117 case PARKED : return "WAITING (parking)";
1118 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1119 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1120 case TERMINATED : return "TERMINATED";
1121 default : return "UNKNOWN";
1122 };
1123 }
1124 int java_lang_ThreadGroup::_parent_offset = 0;
1125 int java_lang_ThreadGroup::_name_offset = 0;
1126 int java_lang_ThreadGroup::_threads_offset = 0;
1127 int java_lang_ThreadGroup::_groups_offset = 0;
1128 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1129 int java_lang_ThreadGroup::_destroyed_offset = 0;
1130 int java_lang_ThreadGroup::_daemon_offset = 0;
1131 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1132 int java_lang_ThreadGroup::_nthreads_offset = 0;
1133 int java_lang_ThreadGroup::_ngroups_offset = 0;
1135 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1136 assert(java_thread_group->is_oop(), "thread group must be oop");
1137 return java_thread_group->obj_field(_parent_offset);
1138 }
1140 // ("name as oop" accessor is not necessary)
1142 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1143 oop name = java_thread_group->obj_field(_name_offset);
1144 // ThreadGroup.name can be null
1145 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1146 }
1148 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1149 assert(java_thread_group->is_oop(), "thread group must be oop");
1150 return java_thread_group->int_field(_nthreads_offset);
1151 }
1153 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1154 oop threads = java_thread_group->obj_field(_threads_offset);
1155 assert(threads != NULL, "threadgroups should have threads");
1156 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1157 return objArrayOop(threads);
1158 }
1160 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1161 assert(java_thread_group->is_oop(), "thread group must be oop");
1162 return java_thread_group->int_field(_ngroups_offset);
1163 }
1165 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1166 oop groups = java_thread_group->obj_field(_groups_offset);
1167 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1168 return objArrayOop(groups);
1169 }
1171 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1172 assert(java_thread_group->is_oop(), "thread group must be oop");
1173 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1174 }
1176 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1177 assert(java_thread_group->is_oop(), "thread group must be oop");
1178 return java_thread_group->bool_field(_destroyed_offset) != 0;
1179 }
1181 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1182 assert(java_thread_group->is_oop(), "thread group must be oop");
1183 return java_thread_group->bool_field(_daemon_offset) != 0;
1184 }
1186 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1187 assert(java_thread_group->is_oop(), "thread group must be oop");
1188 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1189 }
1191 void java_lang_ThreadGroup::compute_offsets() {
1192 assert(_parent_offset == 0, "offsets should be initialized only once");
1194 Klass* k = SystemDictionary::ThreadGroup_klass();
1196 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1197 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1198 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1199 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1200 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1201 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1202 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1203 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1204 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1205 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1206 }
1208 oop java_lang_Throwable::unassigned_stacktrace() {
1209 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1210 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1211 if (UseCompressedOops) {
1212 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1213 } else {
1214 return oopDesc::load_decode_heap_oop((oop*)addr);
1215 }
1216 }
1218 oop java_lang_Throwable::backtrace(oop throwable) {
1219 return throwable->obj_field_acquire(backtrace_offset);
1220 }
1223 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1224 throwable->release_obj_field_put(backtrace_offset, value);
1225 }
1228 oop java_lang_Throwable::message(oop throwable) {
1229 return throwable->obj_field(detailMessage_offset);
1230 }
1233 oop java_lang_Throwable::message(Handle throwable) {
1234 return throwable->obj_field(detailMessage_offset);
1235 }
1238 void java_lang_Throwable::set_message(oop throwable, oop value) {
1239 throwable->obj_field_put(detailMessage_offset, value);
1240 }
1243 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1244 throwable->obj_field_put(stackTrace_offset, st_element_array);
1245 }
1247 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1248 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1249 set_stacktrace(throwable, NULL);
1250 }
1253 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1254 ResourceMark rm;
1255 Klass* k = throwable->klass();
1256 assert(k != NULL, "just checking");
1257 st->print("%s", InstanceKlass::cast(k)->external_name());
1258 oop msg = message(throwable);
1259 if (msg != NULL) {
1260 st->print(": %s", java_lang_String::as_utf8_string(msg));
1261 }
1262 }
1265 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1266 ResourceMark rm;
1267 Klass* k = throwable->klass();
1268 assert(k != NULL, "just checking");
1269 st->print("%s", InstanceKlass::cast(k)->external_name());
1270 oop msg = message(throwable);
1271 if (msg != NULL) {
1272 st->print(": %s", java_lang_String::as_utf8_string(msg));
1273 }
1274 }
1276 // After this many redefines, the stack trace is unreliable.
1277 const int MAX_VERSION = USHRT_MAX;
1279 // Helper backtrace functions to store bci|version together.
1280 static inline int merge_bci_and_version(int bci, int version) {
1281 // only store u2 for version, checking for overflow.
1282 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1283 assert((jushort)bci == bci, "bci should be short");
1284 return build_int_from_shorts(version, bci);
1285 }
1287 static inline int bci_at(unsigned int merged) {
1288 return extract_high_short_from_int(merged);
1289 }
1290 static inline int version_at(unsigned int merged) {
1291 return extract_low_short_from_int(merged);
1292 }
1294 static inline bool version_matches(Method* method, int version) {
1295 assert(version < MAX_VERSION, "version is too big");
1296 return method != NULL && (method->constants()->version() == version);
1297 }
1299 static inline int get_line_number(Method* method, int bci) {
1300 int line_number = 0;
1301 if (method->is_native()) {
1302 // Negative value different from -1 below, enabling Java code in
1303 // class java.lang.StackTraceElement to distinguish "native" from
1304 // "no LineNumberTable". JDK tests for -2.
1305 line_number = -2;
1306 } else {
1307 // Returns -1 if no LineNumberTable, and otherwise actual line number
1308 line_number = method->line_number_from_bci(bci);
1309 if (line_number == -1 && ShowHiddenFrames) {
1310 line_number = bci + 1000000;
1311 }
1312 }
1313 return line_number;
1314 }
1316 // This class provides a simple wrapper over the internal structure of
1317 // exception backtrace to insulate users of the backtrace from needing
1318 // to know what it looks like.
1319 class BacktraceBuilder: public StackObj {
1320 private:
1321 Handle _backtrace;
1322 objArrayOop _head;
1323 typeArrayOop _methods;
1324 typeArrayOop _bcis;
1325 objArrayOop _mirrors;
1326 typeArrayOop _cprefs; // needed to insulate method name against redefinition
1327 int _index;
1328 No_Safepoint_Verifier _nsv;
1330 public:
1332 enum {
1333 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1334 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1335 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1336 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset,
1337 trace_next_offset = java_lang_Throwable::trace_next_offset,
1338 trace_size = java_lang_Throwable::trace_size,
1339 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1340 };
1342 // get info out of chunks
1343 static typeArrayOop get_methods(objArrayHandle chunk) {
1344 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1345 assert(methods != NULL, "method array should be initialized in backtrace");
1346 return methods;
1347 }
1348 static typeArrayOop get_bcis(objArrayHandle chunk) {
1349 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1350 assert(bcis != NULL, "bci array should be initialized in backtrace");
1351 return bcis;
1352 }
1353 static objArrayOop get_mirrors(objArrayHandle chunk) {
1354 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1355 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1356 return mirrors;
1357 }
1358 static typeArrayOop get_cprefs(objArrayHandle chunk) {
1359 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1360 assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1361 return cprefs;
1362 }
1364 // constructor for new backtrace
1365 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1366 expand(CHECK);
1367 _backtrace = _head;
1368 _index = 0;
1369 }
1371 BacktraceBuilder(objArrayHandle backtrace) {
1372 _methods = get_methods(backtrace);
1373 _bcis = get_bcis(backtrace);
1374 _mirrors = get_mirrors(backtrace);
1375 _cprefs = get_cprefs(backtrace);
1376 assert(_methods->length() == _bcis->length() &&
1377 _methods->length() == _mirrors->length(),
1378 "method and source information arrays should match");
1380 // head is the preallocated backtrace
1381 _backtrace = _head = backtrace();
1382 _index = 0;
1383 }
1385 void expand(TRAPS) {
1386 objArrayHandle old_head(THREAD, _head);
1387 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1389 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1390 objArrayHandle new_head(THREAD, head);
1392 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1393 typeArrayHandle new_methods(THREAD, methods);
1395 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1396 typeArrayHandle new_bcis(THREAD, bcis);
1398 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1399 objArrayHandle new_mirrors(THREAD, mirrors);
1401 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1402 typeArrayHandle new_cprefs(THREAD, cprefs);
1404 if (!old_head.is_null()) {
1405 old_head->obj_at_put(trace_next_offset, new_head());
1406 }
1407 new_head->obj_at_put(trace_methods_offset, new_methods());
1408 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1409 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1410 new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1412 _head = new_head();
1413 _methods = new_methods();
1414 _bcis = new_bcis();
1415 _mirrors = new_mirrors();
1416 _cprefs = new_cprefs();
1417 _index = 0;
1418 }
1420 oop backtrace() {
1421 return _backtrace();
1422 }
1424 inline void push(Method* method, int bci, TRAPS) {
1425 // Smear the -1 bci to 0 since the array only holds unsigned
1426 // shorts. The later line number lookup would just smear the -1
1427 // to a 0 even if it could be recorded.
1428 if (bci == SynchronizationEntryBCI) bci = 0;
1430 if (_index >= trace_chunk_size) {
1431 methodHandle mhandle(THREAD, method);
1432 expand(CHECK);
1433 method = mhandle();
1434 }
1436 _methods->short_at_put(_index, method->orig_method_idnum());
1437 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1438 _cprefs->short_at_put(_index, method->name_index());
1440 // We need to save the mirrors in the backtrace to keep the class
1441 // from being unloaded while we still have this stack trace.
1442 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1443 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1444 _index++;
1445 }
1447 };
1449 // Print stack trace element to resource allocated buffer
1450 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1451 int method_id, int version, int bci, int cpref) {
1453 // Get strings and string lengths
1454 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1455 const char* klass_name = holder->external_name();
1456 int buf_len = (int)strlen(klass_name);
1458 Method* method = holder->method_with_orig_idnum(method_id, version);
1460 // The method can be NULL if the requested class version is gone
1461 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1462 char* method_name = sym->as_C_string();
1463 buf_len += (int)strlen(method_name);
1465 // Use a specific ik version as a holder since the mirror might
1466 // refer to a version that is now obsolete and no longer accessible
1467 // via the previous versions list.
1468 holder = holder->get_klass_version(version);
1469 char* source_file_name = NULL;
1470 if (holder != NULL) {
1471 Symbol* source = holder->source_file_name();
1472 if (source != NULL) {
1473 source_file_name = source->as_C_string();
1474 buf_len += (int)strlen(source_file_name);
1475 }
1476 }
1478 // Allocate temporary buffer with extra space for formatting and line number
1479 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1481 // Print stack trace line in buffer
1482 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1484 if (!version_matches(method, version)) {
1485 strcat(buf, "(Redefined)");
1486 } else {
1487 int line_number = get_line_number(method, bci);
1488 if (line_number == -2) {
1489 strcat(buf, "(Native Method)");
1490 } else {
1491 if (source_file_name != NULL && (line_number != -1)) {
1492 // Sourcename and linenumber
1493 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1494 } else if (source_file_name != NULL) {
1495 // Just sourcename
1496 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1497 } else {
1498 // Neither sourcename nor linenumber
1499 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1500 }
1501 nmethod* nm = method->code();
1502 if (WizardMode && nm != NULL) {
1503 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1504 }
1505 }
1506 }
1508 return buf;
1509 }
1511 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1512 int method_id, int version, int bci, int cpref) {
1513 ResourceMark rm;
1514 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1515 st->print_cr("%s", buf);
1516 }
1518 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1519 Handle mirror = method->method_holder()->java_mirror();
1520 int method_id = method->orig_method_idnum();
1521 int version = method->constants()->version();
1522 int cpref = method->name_index();
1523 print_stack_element(st, mirror, method_id, version, bci, cpref);
1524 }
1526 const char* java_lang_Throwable::no_stack_trace_message() {
1527 return "\t<<no stack trace available>>";
1528 }
1531 // Currently used only for exceptions occurring during startup
1532 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1533 Thread *THREAD = Thread::current();
1534 Handle h_throwable(THREAD, throwable);
1535 while (h_throwable.not_null()) {
1536 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1537 if (result.is_null()) {
1538 st->print_cr("%s", no_stack_trace_message());
1539 return;
1540 }
1542 while (result.not_null()) {
1544 // Get method id, bci, version and mirror from chunk
1545 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1546 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1547 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1548 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1550 int length = methods()->length();
1551 for (int index = 0; index < length; index++) {
1552 Handle mirror(THREAD, mirrors->obj_at(index));
1553 // NULL mirror means end of stack trace
1554 if (mirror.is_null()) goto handle_cause;
1555 int method = methods->short_at(index);
1556 int version = version_at(bcis->int_at(index));
1557 int bci = bci_at(bcis->int_at(index));
1558 int cpref = cprefs->short_at(index);
1559 print_stack_element(st, mirror, method, version, bci, cpref);
1560 }
1561 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1562 }
1563 handle_cause:
1564 {
1565 EXCEPTION_MARK;
1566 JavaValue cause(T_OBJECT);
1567 JavaCalls::call_virtual(&cause,
1568 h_throwable,
1569 KlassHandle(THREAD, h_throwable->klass()),
1570 vmSymbols::getCause_name(),
1571 vmSymbols::void_throwable_signature(),
1572 THREAD);
1573 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1574 if (HAS_PENDING_EXCEPTION) {
1575 CLEAR_PENDING_EXCEPTION;
1576 h_throwable = Handle();
1577 } else {
1578 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1579 if (h_throwable.not_null()) {
1580 st->print("Caused by: ");
1581 print(h_throwable, st);
1582 st->cr();
1583 }
1584 }
1585 }
1586 }
1587 }
1589 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1590 if (!StackTraceInThrowable) return;
1591 ResourceMark rm(THREAD);
1593 // Start out by clearing the backtrace for this object, in case the VM
1594 // runs out of memory while allocating the stack trace
1595 set_backtrace(throwable(), NULL);
1596 if (JDK_Version::is_gte_jdk14x_version()) {
1597 // New since 1.4, clear lazily constructed Java level stacktrace if
1598 // refilling occurs
1599 // This is unnecessary in 1.7+ but harmless
1600 clear_stacktrace(throwable());
1601 }
1603 int max_depth = MaxJavaStackTraceDepth;
1604 JavaThread* thread = (JavaThread*)THREAD;
1605 BacktraceBuilder bt(CHECK);
1607 // If there is no Java frame just return the method that was being called
1608 // with bci 0
1609 if (!thread->has_last_Java_frame()) {
1610 if (max_depth >= 1 && method() != NULL) {
1611 bt.push(method(), 0, CHECK);
1612 set_backtrace(throwable(), bt.backtrace());
1613 }
1614 return;
1615 }
1617 // Instead of using vframe directly, this version of fill_in_stack_trace
1618 // basically handles everything by hand. This significantly improved the
1619 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1620 // See bug 6333838 for more details.
1621 // The "ASSERT" here is to verify this method generates the exactly same stack
1622 // trace as utilizing vframe.
1623 #ifdef ASSERT
1624 vframeStream st(thread);
1625 methodHandle st_method(THREAD, st.method());
1626 #endif
1627 int total_count = 0;
1628 RegisterMap map(thread, false);
1629 int decode_offset = 0;
1630 nmethod* nm = NULL;
1631 bool skip_fillInStackTrace_check = false;
1632 bool skip_throwableInit_check = false;
1633 bool skip_hidden = !ShowHiddenFrames;
1635 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1636 Method* method = NULL;
1637 int bci = 0;
1639 // Compiled java method case.
1640 if (decode_offset != 0) {
1641 DebugInfoReadStream stream(nm, decode_offset);
1642 decode_offset = stream.read_int();
1643 method = (Method*)nm->metadata_at(stream.read_int());
1644 bci = stream.read_bci();
1645 } else {
1646 if (fr.is_first_frame()) break;
1647 address pc = fr.pc();
1648 if (fr.is_interpreted_frame()) {
1649 intptr_t bcx = fr.interpreter_frame_bcx();
1650 method = fr.interpreter_frame_method();
1651 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1652 fr = fr.sender(&map);
1653 } else {
1654 CodeBlob* cb = fr.cb();
1655 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1656 // but non nmethod
1657 fr = fr.sender(&map);
1658 if (cb == NULL || !cb->is_nmethod()) {
1659 continue;
1660 }
1661 nm = (nmethod*)cb;
1662 if (nm->method()->is_native()) {
1663 method = nm->method();
1664 bci = 0;
1665 } else {
1666 PcDesc* pd = nm->pc_desc_at(pc);
1667 decode_offset = pd->scope_decode_offset();
1668 // if decode_offset is not equal to 0, it will execute the
1669 // "compiled java method case" at the beginning of the loop.
1670 continue;
1671 }
1672 }
1673 }
1674 #ifdef ASSERT
1675 assert(st_method() == method && st.bci() == bci,
1676 "Wrong stack trace");
1677 st.next();
1678 // vframeStream::method isn't GC-safe so store off a copy
1679 // of the Method* in case we GC.
1680 if (!st.at_end()) {
1681 st_method = st.method();
1682 }
1683 #endif
1685 // the format of the stacktrace will be:
1686 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1687 // - 0 or more <init> methods for the exception class (skipped)
1688 // - rest of the stack
1690 if (!skip_fillInStackTrace_check) {
1691 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1692 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1693 throwable->is_a(method->method_holder())) {
1694 continue;
1695 }
1696 else {
1697 skip_fillInStackTrace_check = true; // gone past them all
1698 }
1699 }
1700 if (!skip_throwableInit_check) {
1701 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1703 // skip <init> methods of the exception class and superclasses
1704 // This is simlar to classic VM.
1705 if (method->name() == vmSymbols::object_initializer_name() &&
1706 throwable->is_a(method->method_holder())) {
1707 continue;
1708 } else {
1709 // there are none or we've seen them all - either way stop checking
1710 skip_throwableInit_check = true;
1711 }
1712 }
1713 if (method->is_hidden()) {
1714 if (skip_hidden) continue;
1715 }
1716 bt.push(method, bci, CHECK);
1717 total_count++;
1718 }
1720 // Put completed stack trace into throwable object
1721 set_backtrace(throwable(), bt.backtrace());
1722 }
1724 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1725 // No-op if stack trace is disabled
1726 if (!StackTraceInThrowable) {
1727 return;
1728 }
1730 // Disable stack traces for some preallocated out of memory errors
1731 if (!Universe::should_fill_in_stack_trace(throwable)) {
1732 return;
1733 }
1735 PRESERVE_EXCEPTION_MARK;
1737 JavaThread* thread = JavaThread::active();
1738 fill_in_stack_trace(throwable, method, thread);
1739 // ignore exceptions thrown during stack trace filling
1740 CLEAR_PENDING_EXCEPTION;
1741 }
1743 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1744 // Allocate stack trace - backtrace is created but not filled in
1746 // No-op if stack trace is disabled
1747 if (!StackTraceInThrowable) return;
1748 BacktraceBuilder bt(CHECK); // creates a backtrace
1749 set_backtrace(throwable(), bt.backtrace());
1750 }
1753 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1754 // Fill in stack trace into preallocated backtrace (no GC)
1756 // No-op if stack trace is disabled
1757 if (!StackTraceInThrowable) return;
1759 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1761 JavaThread* THREAD = JavaThread::current();
1763 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1764 assert(backtrace.not_null(), "backtrace should have been preallocated");
1766 ResourceMark rm(THREAD);
1767 vframeStream st(THREAD);
1769 BacktraceBuilder bt(backtrace);
1771 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1772 // methods as preallocated errors aren't created by "java" code.
1774 // fill in as much stack trace as possible
1775 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1776 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1777 int chunk_count = 0;
1779 for (;!st.at_end(); st.next()) {
1780 bt.push(st.method(), st.bci(), CHECK);
1781 chunk_count++;
1783 // Bail-out for deep stacks
1784 if (chunk_count >= max_chunks) break;
1785 }
1787 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1788 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1789 // can be removed in a JDK using this JVM version
1790 if (JDK_Version::is_gte_jdk17x_version()) {
1791 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1792 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1793 }
1794 }
1797 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1798 if (throwable == NULL) {
1799 THROW_0(vmSymbols::java_lang_NullPointerException());
1800 }
1801 objArrayOop chunk = objArrayOop(backtrace(throwable));
1802 int depth = 0;
1803 if (chunk != NULL) {
1804 // Iterate over chunks and count full ones
1805 while (true) {
1806 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1807 if (next == NULL) break;
1808 depth += trace_chunk_size;
1809 chunk = next;
1810 }
1811 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1812 // Count element in remaining partial chunk. NULL value for mirror
1813 // marks the end of the stack trace elements that are saved.
1814 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1815 assert(mirrors != NULL, "sanity check");
1816 for (int i = 0; i < mirrors->length(); i++) {
1817 if (mirrors->obj_at(i) == NULL) break;
1818 depth++;
1819 }
1820 }
1821 return depth;
1822 }
1825 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1826 if (throwable == NULL) {
1827 THROW_0(vmSymbols::java_lang_NullPointerException());
1828 }
1829 if (index < 0) {
1830 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1831 }
1832 // Compute how many chunks to skip and index into actual chunk
1833 objArrayOop chunk = objArrayOop(backtrace(throwable));
1834 int skip_chunks = index / trace_chunk_size;
1835 int chunk_index = index % trace_chunk_size;
1836 while (chunk != NULL && skip_chunks > 0) {
1837 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1838 skip_chunks--;
1839 }
1840 if (chunk == NULL) {
1841 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1842 }
1843 // Get method id, bci, version, mirror and cpref from chunk
1844 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1845 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1846 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1847 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1849 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1851 int method = methods->short_at(chunk_index);
1852 int version = version_at(bcis->int_at(chunk_index));
1853 int bci = bci_at(bcis->int_at(chunk_index));
1854 int cpref = cprefs->short_at(chunk_index);
1855 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1857 // Chunk can be partial full
1858 if (mirror.is_null()) {
1859 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1860 }
1861 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1862 return element;
1863 }
1865 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1866 int version, int bci, int cpref, TRAPS) {
1867 // Allocate java.lang.StackTraceElement instance
1868 Klass* k = SystemDictionary::StackTraceElement_klass();
1869 assert(k != NULL, "must be loaded in 1.4+");
1870 instanceKlassHandle ik (THREAD, k);
1871 if (ik->should_be_initialized()) {
1872 ik->initialize(CHECK_0);
1873 }
1875 Handle element = ik->allocate_instance_handle(CHECK_0);
1876 // Fill in class name
1877 ResourceMark rm(THREAD);
1878 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1879 const char* str = holder->external_name();
1880 oop classname = StringTable::intern((char*) str, CHECK_0);
1881 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1883 Method* method = holder->method_with_orig_idnum(method_id, version);
1885 // The method can be NULL if the requested class version is gone
1886 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1888 // Fill in method name
1889 oop methodname = StringTable::intern(sym, CHECK_0);
1890 java_lang_StackTraceElement::set_methodName(element(), methodname);
1892 if (!version_matches(method, version)) {
1893 // The method was redefined, accurate line number information isn't available
1894 java_lang_StackTraceElement::set_fileName(element(), NULL);
1895 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1896 } else {
1897 // Fill in source file name and line number.
1898 // Use a specific ik version as a holder since the mirror might
1899 // refer to a version that is now obsolete and no longer accessible
1900 // via the previous versions list.
1901 holder = holder->get_klass_version(version);
1902 assert(holder != NULL, "sanity check");
1903 Symbol* source = holder->source_file_name();
1904 if (ShowHiddenFrames && source == NULL)
1905 source = vmSymbols::unknown_class_name();
1906 oop filename = StringTable::intern(source, CHECK_0);
1907 java_lang_StackTraceElement::set_fileName(element(), filename);
1909 int line_number = get_line_number(method, bci);
1910 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1911 }
1912 return element();
1913 }
1915 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1916 Handle mirror (THREAD, method->method_holder()->java_mirror());
1917 int method_id = method->orig_method_idnum();
1918 int cpref = method->name_index();
1919 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1920 }
1922 void java_lang_reflect_AccessibleObject::compute_offsets() {
1923 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1924 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1925 }
1927 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1928 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1929 return (jboolean) reflect->bool_field(override_offset);
1930 }
1932 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1933 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1934 reflect->bool_field_put(override_offset, (int) value);
1935 }
1937 void java_lang_reflect_Method::compute_offsets() {
1938 Klass* k = SystemDictionary::reflect_Method_klass();
1939 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1940 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1941 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1942 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1943 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1944 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1945 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1946 // The generic signature and annotations fields are only present in 1.5
1947 signature_offset = -1;
1948 annotations_offset = -1;
1949 parameter_annotations_offset = -1;
1950 annotation_default_offset = -1;
1951 type_annotations_offset = -1;
1952 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1953 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1954 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1955 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1956 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1957 }
1959 Handle java_lang_reflect_Method::create(TRAPS) {
1960 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1961 Klass* klass = SystemDictionary::reflect_Method_klass();
1962 // This class is eagerly initialized during VM initialization, since we keep a refence
1963 // to one of the methods
1964 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1965 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
1966 }
1968 oop java_lang_reflect_Method::clazz(oop reflect) {
1969 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1970 return reflect->obj_field(clazz_offset);
1971 }
1973 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1975 reflect->obj_field_put(clazz_offset, value);
1976 }
1978 int java_lang_reflect_Method::slot(oop reflect) {
1979 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1980 return reflect->int_field(slot_offset);
1981 }
1983 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1984 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1985 reflect->int_field_put(slot_offset, value);
1986 }
1988 oop java_lang_reflect_Method::name(oop method) {
1989 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1990 return method->obj_field(name_offset);
1991 }
1993 void java_lang_reflect_Method::set_name(oop method, oop value) {
1994 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1995 method->obj_field_put(name_offset, value);
1996 }
1998 oop java_lang_reflect_Method::return_type(oop method) {
1999 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2000 return method->obj_field(returnType_offset);
2001 }
2003 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2004 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2005 method->obj_field_put(returnType_offset, value);
2006 }
2008 oop java_lang_reflect_Method::parameter_types(oop method) {
2009 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2010 return method->obj_field(parameterTypes_offset);
2011 }
2013 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2014 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2015 method->obj_field_put(parameterTypes_offset, value);
2016 }
2018 oop java_lang_reflect_Method::exception_types(oop method) {
2019 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2020 return method->obj_field(exceptionTypes_offset);
2021 }
2023 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2024 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2025 method->obj_field_put(exceptionTypes_offset, value);
2026 }
2028 int java_lang_reflect_Method::modifiers(oop method) {
2029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2030 return method->int_field(modifiers_offset);
2031 }
2033 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2034 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2035 method->int_field_put(modifiers_offset, value);
2036 }
2038 bool java_lang_reflect_Method::has_signature_field() {
2039 return (signature_offset >= 0);
2040 }
2042 oop java_lang_reflect_Method::signature(oop method) {
2043 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2044 assert(has_signature_field(), "signature field must be present");
2045 return method->obj_field(signature_offset);
2046 }
2048 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2049 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2050 assert(has_signature_field(), "signature field must be present");
2051 method->obj_field_put(signature_offset, value);
2052 }
2054 bool java_lang_reflect_Method::has_annotations_field() {
2055 return (annotations_offset >= 0);
2056 }
2058 oop java_lang_reflect_Method::annotations(oop method) {
2059 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2060 assert(has_annotations_field(), "annotations field must be present");
2061 return method->obj_field(annotations_offset);
2062 }
2064 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2065 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2066 assert(has_annotations_field(), "annotations field must be present");
2067 method->obj_field_put(annotations_offset, value);
2068 }
2070 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2071 return (parameter_annotations_offset >= 0);
2072 }
2074 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2075 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2076 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2077 return method->obj_field(parameter_annotations_offset);
2078 }
2080 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2081 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2082 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2083 method->obj_field_put(parameter_annotations_offset, value);
2084 }
2086 bool java_lang_reflect_Method::has_annotation_default_field() {
2087 return (annotation_default_offset >= 0);
2088 }
2090 oop java_lang_reflect_Method::annotation_default(oop method) {
2091 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2092 assert(has_annotation_default_field(), "annotation default field must be present");
2093 return method->obj_field(annotation_default_offset);
2094 }
2096 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2098 assert(has_annotation_default_field(), "annotation default field must be present");
2099 method->obj_field_put(annotation_default_offset, value);
2100 }
2102 bool java_lang_reflect_Method::has_type_annotations_field() {
2103 return (type_annotations_offset >= 0);
2104 }
2106 oop java_lang_reflect_Method::type_annotations(oop method) {
2107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2108 assert(has_type_annotations_field(), "type_annotations field must be present");
2109 return method->obj_field(type_annotations_offset);
2110 }
2112 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2114 assert(has_type_annotations_field(), "type_annotations field must be present");
2115 method->obj_field_put(type_annotations_offset, value);
2116 }
2118 void java_lang_reflect_Constructor::compute_offsets() {
2119 Klass* k = SystemDictionary::reflect_Constructor_klass();
2120 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2121 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2122 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2123 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2124 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2125 // The generic signature and annotations fields are only present in 1.5
2126 signature_offset = -1;
2127 annotations_offset = -1;
2128 parameter_annotations_offset = -1;
2129 type_annotations_offset = -1;
2130 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2131 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2132 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2133 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2134 }
2136 Handle java_lang_reflect_Constructor::create(TRAPS) {
2137 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2138 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2139 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2140 instanceKlassHandle klass (THREAD, k);
2141 // Ensure it is initialized
2142 klass->initialize(CHECK_NH);
2143 return klass->allocate_instance_handle(CHECK_NH);
2144 }
2146 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2147 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2148 return reflect->obj_field(clazz_offset);
2149 }
2151 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2152 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2153 reflect->obj_field_put(clazz_offset, value);
2154 }
2156 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2157 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2158 return constructor->obj_field(parameterTypes_offset);
2159 }
2161 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2162 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2163 constructor->obj_field_put(parameterTypes_offset, value);
2164 }
2166 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2167 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2168 return constructor->obj_field(exceptionTypes_offset);
2169 }
2171 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2172 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2173 constructor->obj_field_put(exceptionTypes_offset, value);
2174 }
2176 int java_lang_reflect_Constructor::slot(oop reflect) {
2177 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2178 return reflect->int_field(slot_offset);
2179 }
2181 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2182 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2183 reflect->int_field_put(slot_offset, value);
2184 }
2186 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2187 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2188 return constructor->int_field(modifiers_offset);
2189 }
2191 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2192 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2193 constructor->int_field_put(modifiers_offset, value);
2194 }
2196 bool java_lang_reflect_Constructor::has_signature_field() {
2197 return (signature_offset >= 0);
2198 }
2200 oop java_lang_reflect_Constructor::signature(oop constructor) {
2201 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2202 assert(has_signature_field(), "signature field must be present");
2203 return constructor->obj_field(signature_offset);
2204 }
2206 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2207 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2208 assert(has_signature_field(), "signature field must be present");
2209 constructor->obj_field_put(signature_offset, value);
2210 }
2212 bool java_lang_reflect_Constructor::has_annotations_field() {
2213 return (annotations_offset >= 0);
2214 }
2216 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2217 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2218 assert(has_annotations_field(), "annotations field must be present");
2219 return constructor->obj_field(annotations_offset);
2220 }
2222 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2223 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2224 assert(has_annotations_field(), "annotations field must be present");
2225 constructor->obj_field_put(annotations_offset, value);
2226 }
2228 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2229 return (parameter_annotations_offset >= 0);
2230 }
2232 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2233 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2234 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2235 return method->obj_field(parameter_annotations_offset);
2236 }
2238 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2239 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2240 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2241 method->obj_field_put(parameter_annotations_offset, value);
2242 }
2244 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2245 return (type_annotations_offset >= 0);
2246 }
2248 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2249 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2250 assert(has_type_annotations_field(), "type_annotations field must be present");
2251 return constructor->obj_field(type_annotations_offset);
2252 }
2254 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2255 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2256 assert(has_type_annotations_field(), "type_annotations field must be present");
2257 constructor->obj_field_put(type_annotations_offset, value);
2258 }
2260 void java_lang_reflect_Field::compute_offsets() {
2261 Klass* k = SystemDictionary::reflect_Field_klass();
2262 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2263 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2264 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2265 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2266 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2267 // The generic signature and annotations fields are only present in 1.5
2268 signature_offset = -1;
2269 annotations_offset = -1;
2270 type_annotations_offset = -1;
2271 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2272 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2273 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2274 }
2276 Handle java_lang_reflect_Field::create(TRAPS) {
2277 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2278 Symbol* name = vmSymbols::java_lang_reflect_Field();
2279 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2280 instanceKlassHandle klass (THREAD, k);
2281 // Ensure it is initialized
2282 klass->initialize(CHECK_NH);
2283 return klass->allocate_instance_handle(CHECK_NH);
2284 }
2286 oop java_lang_reflect_Field::clazz(oop reflect) {
2287 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2288 return reflect->obj_field(clazz_offset);
2289 }
2291 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2292 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2293 reflect->obj_field_put(clazz_offset, value);
2294 }
2296 oop java_lang_reflect_Field::name(oop field) {
2297 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2298 return field->obj_field(name_offset);
2299 }
2301 void java_lang_reflect_Field::set_name(oop field, oop value) {
2302 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2303 field->obj_field_put(name_offset, value);
2304 }
2306 oop java_lang_reflect_Field::type(oop field) {
2307 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2308 return field->obj_field(type_offset);
2309 }
2311 void java_lang_reflect_Field::set_type(oop field, oop value) {
2312 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2313 field->obj_field_put(type_offset, value);
2314 }
2316 int java_lang_reflect_Field::slot(oop reflect) {
2317 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2318 return reflect->int_field(slot_offset);
2319 }
2321 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2322 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2323 reflect->int_field_put(slot_offset, value);
2324 }
2326 int java_lang_reflect_Field::modifiers(oop field) {
2327 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2328 return field->int_field(modifiers_offset);
2329 }
2331 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2332 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2333 field->int_field_put(modifiers_offset, value);
2334 }
2336 bool java_lang_reflect_Field::has_signature_field() {
2337 return (signature_offset >= 0);
2338 }
2340 oop java_lang_reflect_Field::signature(oop field) {
2341 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2342 assert(has_signature_field(), "signature field must be present");
2343 return field->obj_field(signature_offset);
2344 }
2346 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2347 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2348 assert(has_signature_field(), "signature field must be present");
2349 field->obj_field_put(signature_offset, value);
2350 }
2352 bool java_lang_reflect_Field::has_annotations_field() {
2353 return (annotations_offset >= 0);
2354 }
2356 oop java_lang_reflect_Field::annotations(oop field) {
2357 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2358 assert(has_annotations_field(), "annotations field must be present");
2359 return field->obj_field(annotations_offset);
2360 }
2362 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2363 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2364 assert(has_annotations_field(), "annotations field must be present");
2365 field->obj_field_put(annotations_offset, value);
2366 }
2368 bool java_lang_reflect_Field::has_type_annotations_field() {
2369 return (type_annotations_offset >= 0);
2370 }
2372 oop java_lang_reflect_Field::type_annotations(oop field) {
2373 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2374 assert(has_type_annotations_field(), "type_annotations field must be present");
2375 return field->obj_field(type_annotations_offset);
2376 }
2378 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2379 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2380 assert(has_type_annotations_field(), "type_annotations field must be present");
2381 field->obj_field_put(type_annotations_offset, value);
2382 }
2384 void sun_reflect_ConstantPool::compute_offsets() {
2385 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2386 // This null test can be removed post beta
2387 if (k != NULL) {
2388 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2389 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2390 }
2391 }
2393 void java_lang_reflect_Parameter::compute_offsets() {
2394 Klass* k = SystemDictionary::reflect_Parameter_klass();
2395 if(NULL != k) {
2396 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2397 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2398 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2399 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2400 }
2401 }
2403 Handle java_lang_reflect_Parameter::create(TRAPS) {
2404 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2405 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2406 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2407 instanceKlassHandle klass (THREAD, k);
2408 // Ensure it is initialized
2409 klass->initialize(CHECK_NH);
2410 return klass->allocate_instance_handle(CHECK_NH);
2411 }
2413 oop java_lang_reflect_Parameter::name(oop param) {
2414 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2415 return param->obj_field(name_offset);
2416 }
2418 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2419 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2420 param->obj_field_put(name_offset, value);
2421 }
2423 int java_lang_reflect_Parameter::modifiers(oop param) {
2424 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2425 return param->int_field(modifiers_offset);
2426 }
2428 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2429 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2430 param->int_field_put(modifiers_offset, value);
2431 }
2433 int java_lang_reflect_Parameter::index(oop param) {
2434 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2435 return param->int_field(index_offset);
2436 }
2438 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2439 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2440 param->int_field_put(index_offset, value);
2441 }
2443 oop java_lang_reflect_Parameter::executable(oop param) {
2444 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2445 return param->obj_field(executable_offset);
2446 }
2448 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2449 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2450 param->obj_field_put(executable_offset, value);
2451 }
2454 Handle sun_reflect_ConstantPool::create(TRAPS) {
2455 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2456 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2457 instanceKlassHandle klass (THREAD, k);
2458 // Ensure it is initialized
2459 klass->initialize(CHECK_NH);
2460 return klass->allocate_instance_handle(CHECK_NH);
2461 }
2464 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2465 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2466 oop mirror = value->pool_holder()->java_mirror();
2467 // Save the mirror to get back the constant pool.
2468 reflect->obj_field_put(_oop_offset, mirror);
2469 }
2471 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2472 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2474 oop mirror = reflect->obj_field(_oop_offset);
2475 Klass* k = java_lang_Class::as_Klass(mirror);
2476 assert(k->oop_is_instance(), "Must be");
2478 // Get the constant pool back from the klass. Since class redefinition
2479 // merges the new constant pool into the old, this is essentially the
2480 // same constant pool as the original. If constant pool merging is
2481 // no longer done in the future, this will have to change to save
2482 // the original.
2483 return InstanceKlass::cast(k)->constants();
2484 }
2486 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2487 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2488 // This null test can be removed post beta
2489 if (k != NULL) {
2490 compute_offset(_base_offset, k,
2491 vmSymbols::base_name(), vmSymbols::object_signature());
2492 }
2493 }
2495 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2496 Klass* k = SystemDictionary::box_klass(type);
2497 if (k == NULL) return NULL;
2498 instanceKlassHandle h (THREAD, k);
2499 if (!h->is_initialized()) h->initialize(CHECK_0);
2500 return h->allocate_instance(THREAD);
2501 }
2504 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2505 oop box = initialize_and_allocate(type, CHECK_0);
2506 if (box == NULL) return NULL;
2507 switch (type) {
2508 case T_BOOLEAN:
2509 box->bool_field_put(value_offset, value->z);
2510 break;
2511 case T_CHAR:
2512 box->char_field_put(value_offset, value->c);
2513 break;
2514 case T_FLOAT:
2515 box->float_field_put(value_offset, value->f);
2516 break;
2517 case T_DOUBLE:
2518 box->double_field_put(long_value_offset, value->d);
2519 break;
2520 case T_BYTE:
2521 box->byte_field_put(value_offset, value->b);
2522 break;
2523 case T_SHORT:
2524 box->short_field_put(value_offset, value->s);
2525 break;
2526 case T_INT:
2527 box->int_field_put(value_offset, value->i);
2528 break;
2529 case T_LONG:
2530 box->long_field_put(long_value_offset, value->j);
2531 break;
2532 default:
2533 return NULL;
2534 }
2535 return box;
2536 }
2539 BasicType java_lang_boxing_object::basic_type(oop box) {
2540 if (box == NULL) return T_ILLEGAL;
2541 BasicType type = SystemDictionary::box_klass_type(box->klass());
2542 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2543 return T_ILLEGAL;
2544 return type;
2545 }
2548 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2549 BasicType type = SystemDictionary::box_klass_type(box->klass());
2550 switch (type) {
2551 case T_BOOLEAN:
2552 value->z = box->bool_field(value_offset);
2553 break;
2554 case T_CHAR:
2555 value->c = box->char_field(value_offset);
2556 break;
2557 case T_FLOAT:
2558 value->f = box->float_field(value_offset);
2559 break;
2560 case T_DOUBLE:
2561 value->d = box->double_field(long_value_offset);
2562 break;
2563 case T_BYTE:
2564 value->b = box->byte_field(value_offset);
2565 break;
2566 case T_SHORT:
2567 value->s = box->short_field(value_offset);
2568 break;
2569 case T_INT:
2570 value->i = box->int_field(value_offset);
2571 break;
2572 case T_LONG:
2573 value->j = box->long_field(long_value_offset);
2574 break;
2575 default:
2576 return T_ILLEGAL;
2577 } // end switch
2578 return type;
2579 }
2582 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2583 BasicType type = SystemDictionary::box_klass_type(box->klass());
2584 switch (type) {
2585 case T_BOOLEAN:
2586 box->bool_field_put(value_offset, value->z);
2587 break;
2588 case T_CHAR:
2589 box->char_field_put(value_offset, value->c);
2590 break;
2591 case T_FLOAT:
2592 box->float_field_put(value_offset, value->f);
2593 break;
2594 case T_DOUBLE:
2595 box->double_field_put(long_value_offset, value->d);
2596 break;
2597 case T_BYTE:
2598 box->byte_field_put(value_offset, value->b);
2599 break;
2600 case T_SHORT:
2601 box->short_field_put(value_offset, value->s);
2602 break;
2603 case T_INT:
2604 box->int_field_put(value_offset, value->i);
2605 break;
2606 case T_LONG:
2607 box->long_field_put(long_value_offset, value->j);
2608 break;
2609 default:
2610 return T_ILLEGAL;
2611 } // end switch
2612 return type;
2613 }
2616 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2617 switch (type) {
2618 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2619 case T_CHAR: st->print("%d", value->c); break;
2620 case T_BYTE: st->print("%d", value->b); break;
2621 case T_SHORT: st->print("%d", value->s); break;
2622 case T_INT: st->print("%d", value->i); break;
2623 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2624 case T_FLOAT: st->print("%f", value->f); break;
2625 case T_DOUBLE: st->print("%lf", value->d); break;
2626 default: st->print("type %d?", type); break;
2627 }
2628 }
2631 // Support for java_lang_ref_Reference
2632 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2633 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2634 address addr = ik->static_field_addr(static_lock_offset);
2635 return (HeapWord*) addr;
2636 }
2638 oop java_lang_ref_Reference::pending_list_lock() {
2639 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2640 address addr = ik->static_field_addr(static_lock_offset);
2641 if (UseCompressedOops) {
2642 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2643 } else {
2644 return oopDesc::load_decode_heap_oop((oop*)addr);
2645 }
2646 }
2648 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2649 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2650 address addr = ik->static_field_addr(static_pending_offset);
2651 // XXX This might not be HeapWord aligned, almost rather be char *.
2652 return (HeapWord*)addr;
2653 }
2655 oop java_lang_ref_Reference::pending_list() {
2656 char *addr = (char *)pending_list_addr();
2657 if (UseCompressedOops) {
2658 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2659 } else {
2660 return oopDesc::load_decode_heap_oop((oop*)addr);
2661 }
2662 }
2665 // Support for java_lang_ref_SoftReference
2667 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2668 return ref->long_field(timestamp_offset);
2669 }
2671 jlong java_lang_ref_SoftReference::clock() {
2672 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2673 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2674 return *offset;
2675 }
2677 void java_lang_ref_SoftReference::set_clock(jlong value) {
2678 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2679 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2680 *offset = value;
2681 }
2683 // Support for java_lang_ref_ReferenceQueue
2685 oop java_lang_ref_ReferenceQueue::NULL_queue() {
2686 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::ReferenceQueue_klass());
2687 oop mirror = ik->java_mirror();
2688 return mirror->obj_field(static_NULL_queue_offset);
2689 }
2691 oop java_lang_ref_ReferenceQueue::ENQUEUED_queue() {
2692 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::ReferenceQueue_klass());
2693 oop mirror = ik->java_mirror();
2694 return mirror->obj_field(static_ENQUEUED_queue_offset);
2695 }
2697 void java_lang_ref_ReferenceQueue::compute_offsets() {
2698 Klass* k = SystemDictionary::ReferenceQueue_klass();
2699 compute_offset(static_NULL_queue_offset,
2700 k,
2701 vmSymbols::referencequeue_null_name(),
2702 vmSymbols::referencequeue_signature());
2703 compute_offset(static_ENQUEUED_queue_offset,
2704 k,
2705 vmSymbols::referencequeue_enqueued_name(),
2706 vmSymbols::referencequeue_signature());
2707 }
2709 // Support for java_lang_invoke_DirectMethodHandle
2711 int java_lang_invoke_DirectMethodHandle::_member_offset;
2713 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2714 oop member_name = NULL;
2715 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2716 assert(is_dmh, "a DirectMethodHandle oop is expected");
2717 if (is_dmh) {
2718 member_name = dmh->obj_field(member_offset_in_bytes());
2719 }
2720 return member_name;
2721 }
2723 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2724 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2725 if (klass_oop != NULL && EnableInvokeDynamic) {
2726 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2727 }
2728 }
2730 // Support for java_lang_invoke_MethodHandle
2732 int java_lang_invoke_MethodHandle::_type_offset;
2733 int java_lang_invoke_MethodHandle::_form_offset;
2735 int java_lang_invoke_MemberName::_clazz_offset;
2736 int java_lang_invoke_MemberName::_name_offset;
2737 int java_lang_invoke_MemberName::_type_offset;
2738 int java_lang_invoke_MemberName::_flags_offset;
2739 int java_lang_invoke_MemberName::_vmtarget_offset;
2740 int java_lang_invoke_MemberName::_vmloader_offset;
2741 int java_lang_invoke_MemberName::_vmindex_offset;
2743 int java_lang_invoke_LambdaForm::_vmentry_offset;
2745 void java_lang_invoke_MethodHandle::compute_offsets() {
2746 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2747 if (klass_oop != NULL && EnableInvokeDynamic) {
2748 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2749 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2750 if (_form_offset == 0) {
2751 EnableInvokeDynamic = false;
2752 }
2753 }
2754 }
2756 void java_lang_invoke_MemberName::compute_offsets() {
2757 Klass* klass_oop = SystemDictionary::MemberName_klass();
2758 if (klass_oop != NULL && EnableInvokeDynamic) {
2759 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2760 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2761 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2762 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2763 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2764 }
2765 }
2767 void java_lang_invoke_LambdaForm::compute_offsets() {
2768 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2769 if (klass_oop != NULL && EnableInvokeDynamic) {
2770 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2771 }
2772 }
2774 oop java_lang_invoke_MethodHandle::type(oop mh) {
2775 return mh->obj_field(_type_offset);
2776 }
2778 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2779 mh->obj_field_put(_type_offset, mtype);
2780 }
2782 oop java_lang_invoke_MethodHandle::form(oop mh) {
2783 assert(_form_offset != 0, "");
2784 return mh->obj_field(_form_offset);
2785 }
2787 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2788 assert(_form_offset != 0, "");
2789 mh->obj_field_put(_form_offset, lform);
2790 }
2792 /// MemberName accessors
2794 oop java_lang_invoke_MemberName::clazz(oop mname) {
2795 assert(is_instance(mname), "wrong type");
2796 return mname->obj_field(_clazz_offset);
2797 }
2799 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2800 assert(is_instance(mname), "wrong type");
2801 mname->obj_field_put(_clazz_offset, clazz);
2802 }
2804 oop java_lang_invoke_MemberName::name(oop mname) {
2805 assert(is_instance(mname), "wrong type");
2806 return mname->obj_field(_name_offset);
2807 }
2809 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2810 assert(is_instance(mname), "wrong type");
2811 mname->obj_field_put(_name_offset, name);
2812 }
2814 oop java_lang_invoke_MemberName::type(oop mname) {
2815 assert(is_instance(mname), "wrong type");
2816 return mname->obj_field(_type_offset);
2817 }
2819 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2820 assert(is_instance(mname), "wrong type");
2821 mname->obj_field_put(_type_offset, type);
2822 }
2824 int java_lang_invoke_MemberName::flags(oop mname) {
2825 assert(is_instance(mname), "wrong type");
2826 return mname->int_field(_flags_offset);
2827 }
2829 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2830 assert(is_instance(mname), "wrong type");
2831 mname->int_field_put(_flags_offset, flags);
2832 }
2834 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2835 assert(is_instance(mname), "wrong type");
2836 return (Metadata*)mname->address_field(_vmtarget_offset);
2837 }
2839 bool java_lang_invoke_MemberName::is_method(oop mname) {
2840 assert(is_instance(mname), "must be MemberName");
2841 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2842 }
2844 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2845 assert(is_instance(mname), "wrong type");
2846 // check the type of the vmtarget
2847 oop dependency = NULL;
2848 if (ref != NULL) {
2849 switch (flags(mname) & (MN_IS_METHOD |
2850 MN_IS_CONSTRUCTOR |
2851 MN_IS_FIELD)) {
2852 case MN_IS_METHOD:
2853 case MN_IS_CONSTRUCTOR:
2854 assert(ref->is_method(), "should be a method");
2855 dependency = ((Method*)ref)->method_holder()->java_mirror();
2856 break;
2857 case MN_IS_FIELD:
2858 assert(ref->is_klass(), "should be a class");
2859 dependency = ((Klass*)ref)->java_mirror();
2860 break;
2861 default:
2862 ShouldNotReachHere();
2863 }
2864 }
2865 mname->address_field_put(_vmtarget_offset, (address)ref);
2866 // Add a reference to the loader (actually mirror because anonymous classes will not have
2867 // distinct loaders) to ensure the metadata is kept alive
2868 // This mirror may be different than the one in clazz field.
2869 mname->obj_field_put(_vmloader_offset, dependency);
2870 }
2872 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2873 assert(is_instance(mname), "wrong type");
2874 return (intptr_t) mname->address_field(_vmindex_offset);
2875 }
2877 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2878 assert(is_instance(mname), "wrong type");
2879 mname->address_field_put(_vmindex_offset, (address) index);
2880 }
2882 bool java_lang_invoke_MemberName::equals(oop mn1, oop mn2) {
2883 if (mn1 == mn2) {
2884 return true;
2885 }
2886 return (vmtarget(mn1) == vmtarget(mn2) && flags(mn1) == flags(mn2) &&
2887 vmindex(mn1) == vmindex(mn2) &&
2888 clazz(mn1) == clazz(mn2));
2889 }
2891 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2892 assert(is_instance(lform), "wrong type");
2893 return lform->obj_field(_vmentry_offset);
2894 }
2897 // Support for java_lang_invoke_MethodType
2899 int java_lang_invoke_MethodType::_rtype_offset;
2900 int java_lang_invoke_MethodType::_ptypes_offset;
2902 void java_lang_invoke_MethodType::compute_offsets() {
2903 Klass* k = SystemDictionary::MethodType_klass();
2904 if (k != NULL) {
2905 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2906 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2907 }
2908 }
2910 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2911 st->print("(");
2912 objArrayOop pts = ptypes(mt);
2913 for (int i = 0, limit = pts->length(); i < limit; i++) {
2914 java_lang_Class::print_signature(pts->obj_at(i), st);
2915 }
2916 st->print(")");
2917 java_lang_Class::print_signature(rtype(mt), st);
2918 }
2920 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2921 ResourceMark rm;
2922 stringStream buffer(128);
2923 print_signature(mt, &buffer);
2924 const char* sigstr = buffer.base();
2925 int siglen = (int) buffer.size();
2926 Symbol *name;
2927 if (!intern_if_not_found) {
2928 name = SymbolTable::probe(sigstr, siglen);
2929 } else {
2930 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2931 }
2932 return name;
2933 }
2935 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2936 if (mt1 == mt2)
2937 return true;
2938 if (rtype(mt1) != rtype(mt2))
2939 return false;
2940 if (ptype_count(mt1) != ptype_count(mt2))
2941 return false;
2942 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2943 if (ptype(mt1, i) != ptype(mt2, i))
2944 return false;
2945 }
2946 return true;
2947 }
2949 oop java_lang_invoke_MethodType::rtype(oop mt) {
2950 assert(is_instance(mt), "must be a MethodType");
2951 return mt->obj_field(_rtype_offset);
2952 }
2954 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2955 assert(is_instance(mt), "must be a MethodType");
2956 return (objArrayOop) mt->obj_field(_ptypes_offset);
2957 }
2959 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2960 return ptypes(mt)->obj_at(idx);
2961 }
2963 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2964 return ptypes(mt)->length();
2965 }
2967 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2968 objArrayOop pts = ptypes(mt);
2969 int count = pts->length();
2970 int slots = 0;
2971 for (int i = 0; i < count; i++) {
2972 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2973 slots += type2size[bt];
2974 }
2975 return slots;
2976 }
2978 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2979 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2980 return type2size[bt];
2981 }
2984 // Support for java_lang_invoke_CallSite
2986 int java_lang_invoke_CallSite::_target_offset;
2988 void java_lang_invoke_CallSite::compute_offsets() {
2989 if (!EnableInvokeDynamic) return;
2990 Klass* k = SystemDictionary::CallSite_klass();
2991 if (k != NULL) {
2992 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2993 }
2994 }
2997 // Support for java_security_AccessControlContext
2999 int java_security_AccessControlContext::_context_offset = 0;
3000 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3001 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3002 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3004 void java_security_AccessControlContext::compute_offsets() {
3005 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3006 fieldDescriptor fd;
3007 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
3009 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3010 fatal("Invalid layout of java.security.AccessControlContext");
3011 }
3012 _context_offset = fd.offset();
3014 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3015 fatal("Invalid layout of java.security.AccessControlContext");
3016 }
3017 _privilegedContext_offset = fd.offset();
3019 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3020 fatal("Invalid layout of java.security.AccessControlContext");
3021 }
3022 _isPrivileged_offset = fd.offset();
3024 // The offset may not be present for bootstrapping with older JDK.
3025 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3026 _isAuthorized_offset = fd.offset();
3027 }
3028 }
3031 bool java_security_AccessControlContext::is_authorized(Handle context) {
3032 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3033 assert(_isAuthorized_offset != -1, "should be set");
3034 return context->bool_field(_isAuthorized_offset) != 0;
3035 }
3037 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3038 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3039 // Ensure klass is initialized
3040 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3041 // Allocate result
3042 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3043 // Fill in values
3044 result->obj_field_put(_context_offset, context());
3045 result->obj_field_put(_privilegedContext_offset, privileged_context());
3046 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3047 // whitelist AccessControlContexts created by the JVM if present
3048 if (_isAuthorized_offset != -1) {
3049 result->bool_field_put(_isAuthorized_offset, true);
3050 }
3051 return result;
3052 }
3055 // Support for java_lang_ClassLoader
3057 bool java_lang_ClassLoader::offsets_computed = false;
3058 int java_lang_ClassLoader::_loader_data_offset = -1;
3059 int java_lang_ClassLoader::parallelCapable_offset = -1;
3061 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3062 assert(loader != NULL && loader->is_oop(), "loader must be oop");
3063 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3064 }
3066 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3067 return *java_lang_ClassLoader::loader_data_addr(loader);
3068 }
3070 void java_lang_ClassLoader::compute_offsets() {
3071 assert(!offsets_computed, "offsets should be initialized only once");
3072 offsets_computed = true;
3074 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3075 Klass* k1 = SystemDictionary::ClassLoader_klass();
3076 compute_optional_offset(parallelCapable_offset,
3077 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3079 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3080 }
3082 oop java_lang_ClassLoader::parent(oop loader) {
3083 assert(is_instance(loader), "loader must be oop");
3084 return loader->obj_field(parent_offset);
3085 }
3087 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3088 assert(is_instance(loader), "loader must be oop");
3089 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3090 oop acl = loader;
3091 debug_only(jint loop_count = 0);
3092 // This loop taken verbatim from ClassLoader.java:
3093 do {
3094 acl = parent(acl);
3095 if (cl == acl) {
3096 return true;
3097 }
3098 assert(++loop_count > 0, "loop_count overflow");
3099 } while (acl != NULL);
3100 return false;
3101 }
3104 // For class loader classes, parallelCapable defined
3105 // based on non-null field
3106 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3107 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3108 if (!JDK_Version::is_gte_jdk17x_version()
3109 || parallelCapable_offset == -1) {
3110 // Default for backward compatibility is false
3111 return false;
3112 }
3113 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3114 }
3116 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3117 // Fix for 4474172; see evaluation for more details
3118 loader = non_reflection_class_loader(loader);
3120 oop cl = SystemDictionary::java_system_loader();
3121 while(cl != NULL) {
3122 if (cl == loader) return true;
3123 cl = parent(cl);
3124 }
3125 return false;
3126 }
3128 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3129 if (loader != NULL) {
3130 // See whether this is one of the class loaders associated with
3131 // the generated bytecodes for reflection, and if so, "magically"
3132 // delegate to its parent to prevent class loading from occurring
3133 // in places where applications using reflection didn't expect it.
3134 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3135 // This might be null in non-1.4 JDKs
3136 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3137 return parent(loader);
3138 }
3139 }
3140 return loader;
3141 }
3144 // Support for java_lang_System
3145 int java_lang_System::in_offset_in_bytes() {
3146 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3147 }
3150 int java_lang_System::out_offset_in_bytes() {
3151 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3152 }
3155 int java_lang_System::err_offset_in_bytes() {
3156 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3157 }
3160 bool java_lang_System::has_security_manager() {
3161 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3162 address addr = ik->static_field_addr(static_security_offset);
3163 if (UseCompressedOops) {
3164 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3165 } else {
3166 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3167 }
3168 }
3170 int java_lang_Class::_klass_offset;
3171 int java_lang_Class::_array_klass_offset;
3172 int java_lang_Class::_oop_size_offset;
3173 int java_lang_Class::_static_oop_field_count_offset;
3174 int java_lang_Class::_class_loader_offset;
3175 int java_lang_Class::_protection_domain_offset;
3176 int java_lang_Class::_init_lock_offset;
3177 int java_lang_Class::_signers_offset;
3178 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3179 int java_lang_Throwable::backtrace_offset;
3180 int java_lang_Throwable::detailMessage_offset;
3181 int java_lang_Throwable::cause_offset;
3182 int java_lang_Throwable::stackTrace_offset;
3183 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3184 int java_lang_reflect_AccessibleObject::override_offset;
3185 int java_lang_reflect_Method::clazz_offset;
3186 int java_lang_reflect_Method::name_offset;
3187 int java_lang_reflect_Method::returnType_offset;
3188 int java_lang_reflect_Method::parameterTypes_offset;
3189 int java_lang_reflect_Method::exceptionTypes_offset;
3190 int java_lang_reflect_Method::slot_offset;
3191 int java_lang_reflect_Method::modifiers_offset;
3192 int java_lang_reflect_Method::signature_offset;
3193 int java_lang_reflect_Method::annotations_offset;
3194 int java_lang_reflect_Method::parameter_annotations_offset;
3195 int java_lang_reflect_Method::annotation_default_offset;
3196 int java_lang_reflect_Method::type_annotations_offset;
3197 int java_lang_reflect_Constructor::clazz_offset;
3198 int java_lang_reflect_Constructor::parameterTypes_offset;
3199 int java_lang_reflect_Constructor::exceptionTypes_offset;
3200 int java_lang_reflect_Constructor::slot_offset;
3201 int java_lang_reflect_Constructor::modifiers_offset;
3202 int java_lang_reflect_Constructor::signature_offset;
3203 int java_lang_reflect_Constructor::annotations_offset;
3204 int java_lang_reflect_Constructor::parameter_annotations_offset;
3205 int java_lang_reflect_Constructor::type_annotations_offset;
3206 int java_lang_reflect_Field::clazz_offset;
3207 int java_lang_reflect_Field::name_offset;
3208 int java_lang_reflect_Field::type_offset;
3209 int java_lang_reflect_Field::slot_offset;
3210 int java_lang_reflect_Field::modifiers_offset;
3211 int java_lang_reflect_Field::signature_offset;
3212 int java_lang_reflect_Field::annotations_offset;
3213 int java_lang_reflect_Field::type_annotations_offset;
3214 int java_lang_reflect_Parameter::name_offset;
3215 int java_lang_reflect_Parameter::modifiers_offset;
3216 int java_lang_reflect_Parameter::index_offset;
3217 int java_lang_reflect_Parameter::executable_offset;
3218 int java_lang_boxing_object::value_offset;
3219 int java_lang_boxing_object::long_value_offset;
3220 int java_lang_ref_Reference::referent_offset;
3221 int java_lang_ref_Reference::queue_offset;
3222 int java_lang_ref_Reference::next_offset;
3223 int java_lang_ref_Reference::discovered_offset;
3224 int java_lang_ref_Reference::static_lock_offset;
3225 int java_lang_ref_Reference::static_pending_offset;
3226 int java_lang_ref_Reference::number_of_fake_oop_fields;
3227 int java_lang_ref_ReferenceQueue::static_NULL_queue_offset;
3228 int java_lang_ref_ReferenceQueue::static_ENQUEUED_queue_offset;
3229 int java_lang_ref_SoftReference::timestamp_offset;
3230 int java_lang_ref_SoftReference::static_clock_offset;
3231 int java_lang_ClassLoader::parent_offset;
3232 int java_lang_System::static_in_offset;
3233 int java_lang_System::static_out_offset;
3234 int java_lang_System::static_err_offset;
3235 int java_lang_System::static_security_offset;
3236 int java_lang_StackTraceElement::declaringClass_offset;
3237 int java_lang_StackTraceElement::methodName_offset;
3238 int java_lang_StackTraceElement::fileName_offset;
3239 int java_lang_StackTraceElement::lineNumber_offset;
3240 int java_lang_AssertionStatusDirectives::classes_offset;
3241 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3242 int java_lang_AssertionStatusDirectives::packages_offset;
3243 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3244 int java_lang_AssertionStatusDirectives::deflt_offset;
3245 int java_nio_Buffer::_limit_offset;
3246 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3247 int sun_reflect_ConstantPool::_oop_offset;
3248 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3251 // Support for java_lang_StackTraceElement
3253 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3254 element->obj_field_put(fileName_offset, value);
3255 }
3257 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3258 element->obj_field_put(declaringClass_offset, value);
3259 }
3261 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3262 element->obj_field_put(methodName_offset, value);
3263 }
3265 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3266 element->int_field_put(lineNumber_offset, value);
3267 }
3270 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3272 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3273 o->obj_field_put(classes_offset, val);
3274 }
3276 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3277 o->obj_field_put(classEnabled_offset, val);
3278 }
3280 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3281 o->obj_field_put(packages_offset, val);
3282 }
3284 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3285 o->obj_field_put(packageEnabled_offset, val);
3286 }
3288 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3289 o->bool_field_put(deflt_offset, val);
3290 }
3293 // Support for intrinsification of java.nio.Buffer.checkIndex
3294 int java_nio_Buffer::limit_offset() {
3295 return _limit_offset;
3296 }
3299 void java_nio_Buffer::compute_offsets() {
3300 Klass* k = SystemDictionary::nio_Buffer_klass();
3301 assert(k != NULL, "must be loaded in 1.4+");
3302 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3303 }
3305 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3306 if (_owner_offset != 0) return;
3308 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3309 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3310 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3311 compute_offset(_owner_offset, k,
3312 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3313 }
3315 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3316 assert(_owner_offset != 0, "Must be initialized");
3317 return obj->obj_field(_owner_offset);
3318 }
3320 // Compute hard-coded offsets
3321 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3322 // are not available to determine the offset_of_static_fields.
3323 void JavaClasses::compute_hard_coded_offsets() {
3324 const int x = heapOopSize;
3325 const int header = instanceOopDesc::base_offset_in_bytes();
3327 // Throwable Class
3328 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3329 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3330 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3331 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3332 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3334 // java_lang_boxing_object
3335 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3336 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3338 // java_lang_ref_Reference:
3339 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3340 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3341 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3342 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3343 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3344 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3345 // Artificial fields for java_lang_ref_Reference
3346 // The first field is for the discovered field added in 1.4
3347 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3349 // java_lang_ref_SoftReference Class
3350 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3351 // Don't multiply static fields because they are always in wordSize units
3352 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3354 // java_lang_ClassLoader
3355 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3357 // java_lang_System
3358 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3359 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3360 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3361 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3363 // java_lang_StackTraceElement
3364 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3365 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3366 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3367 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3368 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3369 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3370 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3371 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3372 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3374 }
3377 // Compute non-hard-coded field offsets of all the classes in this file
3378 void JavaClasses::compute_offsets() {
3379 // java_lang_Class::compute_offsets was called earlier in bootstrap
3380 java_lang_ClassLoader::compute_offsets();
3381 java_lang_Thread::compute_offsets();
3382 java_lang_ThreadGroup::compute_offsets();
3383 if (EnableInvokeDynamic) {
3384 java_lang_invoke_MethodHandle::compute_offsets();
3385 java_lang_invoke_DirectMethodHandle::compute_offsets();
3386 java_lang_invoke_MemberName::compute_offsets();
3387 java_lang_invoke_LambdaForm::compute_offsets();
3388 java_lang_invoke_MethodType::compute_offsets();
3389 java_lang_invoke_CallSite::compute_offsets();
3390 }
3391 java_security_AccessControlContext::compute_offsets();
3392 // Initialize reflection classes. The layouts of these classes
3393 // changed with the new reflection implementation in JDK 1.4, and
3394 // since the Universe doesn't know what JDK version it is until this
3395 // point we defer computation of these offsets until now.
3396 java_lang_reflect_AccessibleObject::compute_offsets();
3397 java_lang_reflect_Method::compute_offsets();
3398 java_lang_reflect_Constructor::compute_offsets();
3399 java_lang_reflect_Field::compute_offsets();
3400 if (JDK_Version::is_gte_jdk14x_version()) {
3401 java_nio_Buffer::compute_offsets();
3402 }
3403 if (JDK_Version::is_gte_jdk15x_version()) {
3404 sun_reflect_ConstantPool::compute_offsets();
3405 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3406 }
3407 if (JDK_Version::is_jdk18x_version())
3408 java_lang_reflect_Parameter::compute_offsets();
3410 java_lang_ref_ReferenceQueue::compute_offsets();
3412 // generated interpreter code wants to know about the offsets we just computed:
3413 AbstractAssembler::update_delayed_values();
3414 }
3416 #ifndef PRODUCT
3418 // These functions exist to assert the validity of hard-coded field offsets to guard
3419 // against changes in the class files
3421 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3422 EXCEPTION_MARK;
3423 fieldDescriptor fd;
3424 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3425 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3426 instanceKlassHandle h_klass (THREAD, k);
3427 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3428 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3429 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3430 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3431 return false;
3432 }
3433 if (fd.is_static()) {
3434 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3435 return false;
3436 }
3437 if (fd.offset() == hardcoded_offset ) {
3438 return true;
3439 } else {
3440 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3441 klass_name, field_name, hardcoded_offset, fd.offset());
3442 return false;
3443 }
3444 }
3447 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3448 EXCEPTION_MARK;
3449 fieldDescriptor fd;
3450 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3451 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3452 instanceKlassHandle h_klass (THREAD, k);
3453 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3454 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3455 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3456 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3457 return false;
3458 }
3459 if (!fd.is_static()) {
3460 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3461 return false;
3462 }
3463 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3464 return true;
3465 } else {
3466 tty->print_cr("Offset of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_offset, fd.offset() - InstanceMirrorKlass::offset_of_static_fields());
3467 return false;
3468 }
3469 }
3472 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3473 EXCEPTION_MARK;
3474 fieldDescriptor fd;
3475 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3476 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3477 instanceKlassHandle h_klass (THREAD, k);
3478 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3479 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3480 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3481 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3482 return false;
3483 }
3484 if (!fd.is_static() || !fd.has_initial_value()) {
3485 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3486 return false;
3487 }
3488 if (!fd.initial_value_tag().is_int()) {
3489 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3490 return false;
3491 }
3492 jint field_value = fd.int_initial_value();
3493 if (field_value == hardcoded_constant) {
3494 return true;
3495 } else {
3496 tty->print_cr("Constant value of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_constant, field_value);
3497 return false;
3498 }
3499 }
3502 // Check the hard-coded field offsets of all the classes in this file
3504 void JavaClasses::check_offsets() {
3505 bool valid = true;
3506 HandleMark hm;
3508 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3509 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3511 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3512 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3514 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3515 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3517 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3518 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3520 // java.lang.String
3522 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3523 if (java_lang_String::has_offset_field()) {
3524 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3525 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3526 }
3527 if (java_lang_String::has_hash_field()) {
3528 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3529 }
3531 // java.lang.Class
3533 // Fake fields
3534 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3535 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3537 // java.lang.Throwable
3539 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3540 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3541 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3542 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3544 // Boxed primitive objects (java_lang_boxing_object)
3546 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3547 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3548 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3549 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3550 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3551 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3552 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3553 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3555 // java.lang.ClassLoader
3557 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3559 // java.lang.System
3561 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3562 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3563 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3564 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3566 // java.lang.StackTraceElement
3568 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3569 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3570 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3571 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3573 // java.lang.ref.Reference
3575 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3576 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3577 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3578 // Fake field
3579 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3580 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3581 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3583 // java.lang.ref.SoftReference
3585 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3586 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3588 // java.lang.AssertionStatusDirectives
3589 //
3590 // The CheckAssertionStatusDirectives boolean can be removed from here and
3591 // globals.hpp after the AssertionStatusDirectives class has been integrated
3592 // into merlin "for some time." Without it, the vm will fail with early
3593 // merlin builds.
3595 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3596 const char* nm = "java/lang/AssertionStatusDirectives";
3597 const char* sig = "[Ljava/lang/String;";
3598 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3599 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3600 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3601 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3602 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3603 }
3605 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3606 }
3608 #endif // PRODUCT
3610 int InjectedField::compute_offset() {
3611 Klass* klass_oop = klass();
3612 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3613 if (!may_be_java && !fs.access_flags().is_internal()) {
3614 // Only look at injected fields
3615 continue;
3616 }
3617 if (fs.name() == name() && fs.signature() == signature()) {
3618 return fs.offset();
3619 }
3620 }
3621 ResourceMark rm;
3622 tty->print_cr("Invalid layout of %s at %s/%s%s", InstanceKlass::cast(klass_oop)->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : "");
3623 #ifndef PRODUCT
3624 klass_oop->print();
3625 tty->print_cr("all fields:");
3626 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3627 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3628 }
3629 #endif //PRODUCT
3630 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
3631 return -1;
3632 }
3634 void javaClasses_init() {
3635 JavaClasses::compute_offsets();
3636 JavaClasses::check_offsets();
3637 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3638 }