Mon, 25 Jun 2012 21:33:35 -0400
7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
Summary: Cannot delete _buckets and HashtableEntries in shared space (CDS)
Reviewed-by: acorn, kvn, dlong, dcubed, kamg
1 /*
2 * Copyright (c) 1997, 2012, 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/javaClasses.hpp"
27 #include "gc_implementation/shared/markSweep.inline.hpp"
28 #include "gc_interface/collectedHeap.inline.hpp"
29 #include "interpreter/interpreter.hpp"
30 #include "memory/gcLocker.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "memory/universe.inline.hpp"
33 #include "oops/constMethodKlass.hpp"
34 #include "oops/klassOop.hpp"
35 #include "oops/methodDataOop.hpp"
36 #include "oops/methodKlass.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "oops/oop.inline2.hpp"
39 #include "oops/symbol.hpp"
40 #include "runtime/handles.inline.hpp"
42 klassOop methodKlass::create_klass(TRAPS) {
43 methodKlass o;
44 KlassHandle h_this_klass(THREAD, Universe::klassKlassObj());
45 KlassHandle k = base_create_klass(h_this_klass, header_size(), o.vtbl_value(), CHECK_NULL);
46 // Make sure size calculation is right
47 assert(k()->size() == align_object_size(header_size()), "wrong size for object");
48 java_lang_Class::create_mirror(k, CHECK_NULL); // Allocate mirror
49 return k();
50 }
53 int methodKlass::oop_size(oop obj) const {
54 assert(obj->is_method(), "must be method oop");
55 return methodOop(obj)->object_size();
56 }
59 bool methodKlass::oop_is_parsable(oop obj) const {
60 assert(obj->is_method(), "must be method oop");
61 return methodOop(obj)->object_is_parsable();
62 }
65 methodOop methodKlass::allocate(constMethodHandle xconst,
66 AccessFlags access_flags, TRAPS) {
67 int size = methodOopDesc::object_size(access_flags.is_native());
68 KlassHandle h_k(THREAD, as_klassOop());
69 assert(xconst()->is_parsable(), "possible publication protocol violation");
70 methodOop m = (methodOop)CollectedHeap::permanent_obj_allocate(h_k, size, CHECK_NULL);
71 assert(!m->is_parsable(), "not expecting parsability yet.");
73 No_Safepoint_Verifier no_safepoint; // until m becomes parsable below
74 m->set_constMethod(xconst());
75 m->set_access_flags(access_flags);
76 m->set_method_size(size);
77 m->set_name_index(0);
78 m->set_signature_index(0);
79 #ifdef CC_INTERP
80 m->set_result_index(T_VOID);
81 #endif
82 m->set_constants(NULL);
83 m->set_max_stack(0);
84 m->set_max_locals(0);
85 m->set_intrinsic_id(vmIntrinsics::_none);
86 m->set_jfr_towrite(false);
87 m->set_method_data(NULL);
88 m->set_interpreter_throwout_count(0);
89 m->set_vtable_index(methodOopDesc::garbage_vtable_index);
91 // Fix and bury in methodOop
92 m->set_interpreter_entry(NULL); // sets i2i entry and from_int
93 m->set_adapter_entry(NULL);
94 m->clear_code(); // from_c/from_i get set to c2i/i2i
96 if (access_flags.is_native()) {
97 m->clear_native_function();
98 m->set_signature_handler(NULL);
99 }
101 NOT_PRODUCT(m->set_compiled_invocation_count(0);)
102 m->set_interpreter_invocation_count(0);
103 m->invocation_counter()->init();
104 m->backedge_counter()->init();
105 m->clear_number_of_breakpoints();
107 #ifdef TIERED
108 m->set_rate(0);
109 m->set_prev_event_count(0);
110 m->set_prev_time(0);
111 #endif
113 assert(m->is_parsable(), "must be parsable here.");
114 assert(m->size() == size, "wrong size for object");
115 return m;
116 }
119 void methodKlass::oop_follow_contents(oop obj) {
120 assert (obj->is_method(), "object must be method");
121 methodOop m = methodOop(obj);
122 // Performance tweak: We skip iterating over the klass pointer since we
123 // know that Universe::methodKlassObj never moves.
124 MarkSweep::mark_and_push(m->adr_constMethod());
125 if (m->method_data() != NULL) {
126 MarkSweep::mark_and_push(m->adr_method_data());
127 }
128 }
130 #ifndef SERIALGC
131 void methodKlass::oop_follow_contents(ParCompactionManager* cm,
132 oop obj) {
133 assert (obj->is_method(), "object must be method");
134 methodOop m = methodOop(obj);
135 // Performance tweak: We skip iterating over the klass pointer since we
136 // know that Universe::methodKlassObj never moves.
137 PSParallelCompact::mark_and_push(cm, m->adr_constMethod());
138 #ifdef COMPILER2
139 if (m->method_data() != NULL) {
140 PSParallelCompact::mark_and_push(cm, m->adr_method_data());
141 }
142 #endif // COMPILER2
143 }
144 #endif // SERIALGC
146 int methodKlass::oop_oop_iterate(oop obj, OopClosure* blk) {
147 assert (obj->is_method(), "object must be method");
148 methodOop m = methodOop(obj);
149 // Get size before changing pointers.
150 // Don't call size() or oop_size() since that is a virtual call.
151 int size = m->object_size();
152 // Performance tweak: We skip iterating over the klass pointer since we
153 // know that Universe::methodKlassObj never moves
154 blk->do_oop(m->adr_constMethod());
155 if (m->method_data() != NULL) {
156 blk->do_oop(m->adr_method_data());
157 }
158 return size;
159 }
162 int methodKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
163 assert (obj->is_method(), "object must be method");
164 methodOop m = methodOop(obj);
165 // Get size before changing pointers.
166 // Don't call size() or oop_size() since that is a virtual call.
167 int size = m->object_size();
168 // Performance tweak: We skip iterating over the klass pointer since we
169 // know that Universe::methodKlassObj never moves.
170 oop* adr;
171 adr = m->adr_constMethod();
172 if (mr.contains(adr)) blk->do_oop(adr);
173 if (m->method_data() != NULL) {
174 adr = m->adr_method_data();
175 if (mr.contains(adr)) blk->do_oop(adr);
176 }
177 return size;
178 }
181 int methodKlass::oop_adjust_pointers(oop obj) {
182 assert(obj->is_method(), "should be method");
183 methodOop m = methodOop(obj);
184 // Get size before changing pointers.
185 // Don't call size() or oop_size() since that is a virtual call.
186 int size = m->object_size();
187 // Performance tweak: We skip iterating over the klass pointer since we
188 // know that Universe::methodKlassObj never moves.
189 MarkSweep::adjust_pointer(m->adr_constMethod());
190 if (m->method_data() != NULL) {
191 MarkSweep::adjust_pointer(m->adr_method_data());
192 }
193 return size;
194 }
196 #ifndef SERIALGC
197 void methodKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
198 assert(obj->is_method(), "should be method");
199 }
201 int methodKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
202 assert(obj->is_method(), "should be method");
203 methodOop m = methodOop(obj);
204 PSParallelCompact::adjust_pointer(m->adr_constMethod());
205 #ifdef COMPILER2
206 if (m->method_data() != NULL) {
207 PSParallelCompact::adjust_pointer(m->adr_method_data());
208 }
209 #endif // COMPILER2
210 return m->object_size();
211 }
212 #endif // SERIALGC
214 #ifndef PRODUCT
216 // Printing
218 void methodKlass::oop_print_on(oop obj, outputStream* st) {
219 ResourceMark rm;
220 assert(obj->is_method(), "must be method");
221 Klass::oop_print_on(obj, st);
222 methodOop m = methodOop(obj);
223 // get the effect of PrintOopAddress, always, for methods:
224 st->print_cr(" - this oop: "INTPTR_FORMAT, (intptr_t)m);
225 st->print (" - method holder: "); m->method_holder()->print_value_on(st); st->cr();
226 st->print (" - constants: "INTPTR_FORMAT" ", (address)m->constants());
227 m->constants()->print_value_on(st); st->cr();
228 st->print (" - access: 0x%x ", m->access_flags().as_int()); m->access_flags().print_on(st); st->cr();
229 st->print (" - name: "); m->name()->print_value_on(st); st->cr();
230 st->print (" - signature: "); m->signature()->print_value_on(st); st->cr();
231 st->print_cr(" - max stack: %d", m->max_stack());
232 st->print_cr(" - max locals: %d", m->max_locals());
233 st->print_cr(" - size of params: %d", m->size_of_parameters());
234 st->print_cr(" - method size: %d", m->method_size());
235 if (m->intrinsic_id() != vmIntrinsics::_none)
236 st->print_cr(" - intrinsic id: %d %s", m->intrinsic_id(), vmIntrinsics::name_at(m->intrinsic_id()));
237 if (m->highest_comp_level() != CompLevel_none)
238 st->print_cr(" - highest level: %d", m->highest_comp_level());
239 st->print_cr(" - vtable index: %d", m->_vtable_index);
240 st->print_cr(" - i2i entry: " INTPTR_FORMAT, m->interpreter_entry());
241 st->print_cr(" - adapter: " INTPTR_FORMAT, m->adapter());
242 st->print_cr(" - compiled entry " INTPTR_FORMAT, m->from_compiled_entry());
243 st->print_cr(" - code size: %d", m->code_size());
244 if (m->code_size() != 0) {
245 st->print_cr(" - code start: " INTPTR_FORMAT, m->code_base());
246 st->print_cr(" - code end (excl): " INTPTR_FORMAT, m->code_base() + m->code_size());
247 }
248 if (m->method_data() != NULL) {
249 st->print_cr(" - method data: " INTPTR_FORMAT, (address)m->method_data());
250 }
251 st->print_cr(" - checked ex length: %d", m->checked_exceptions_length());
252 if (m->checked_exceptions_length() > 0) {
253 CheckedExceptionElement* table = m->checked_exceptions_start();
254 st->print_cr(" - checked ex start: " INTPTR_FORMAT, table);
255 if (Verbose) {
256 for (int i = 0; i < m->checked_exceptions_length(); i++) {
257 st->print_cr(" - throws %s", m->constants()->printable_name_at(table[i].class_cp_index));
258 }
259 }
260 }
261 if (m->has_linenumber_table()) {
262 u_char* table = m->compressed_linenumber_table();
263 st->print_cr(" - linenumber start: " INTPTR_FORMAT, table);
264 if (Verbose) {
265 CompressedLineNumberReadStream stream(table);
266 while (stream.read_pair()) {
267 st->print_cr(" - line %d: %d", stream.line(), stream.bci());
268 }
269 }
270 }
271 st->print_cr(" - localvar length: %d", m->localvariable_table_length());
272 if (m->localvariable_table_length() > 0) {
273 LocalVariableTableElement* table = m->localvariable_table_start();
274 st->print_cr(" - localvar start: " INTPTR_FORMAT, table);
275 if (Verbose) {
276 for (int i = 0; i < m->localvariable_table_length(); i++) {
277 int bci = table[i].start_bci;
278 int len = table[i].length;
279 const char* name = m->constants()->printable_name_at(table[i].name_cp_index);
280 const char* desc = m->constants()->printable_name_at(table[i].descriptor_cp_index);
281 int slot = table[i].slot;
282 st->print_cr(" - %s %s bci=%d len=%d slot=%d", desc, name, bci, len, slot);
283 }
284 }
285 }
286 if (m->code() != NULL) {
287 st->print (" - compiled code: ");
288 m->code()->print_value_on(st);
289 st->cr();
290 }
291 if (m->is_method_handle_invoke()) {
292 st->print_cr(" - invoke method type: " INTPTR_FORMAT, (address) m->method_handle_type());
293 // m is classified as native, but it does not have an interesting
294 // native_function or signature handler
295 } else if (m->is_native()) {
296 st->print_cr(" - native function: " INTPTR_FORMAT, m->native_function());
297 st->print_cr(" - signature handler: " INTPTR_FORMAT, m->signature_handler());
298 }
299 }
301 #endif //PRODUCT
303 void methodKlass::oop_print_value_on(oop obj, outputStream* st) {
304 assert(obj->is_method(), "must be method");
305 Klass::oop_print_value_on(obj, st);
306 methodOop m = methodOop(obj);
307 st->print(" ");
308 m->name()->print_value_on(st);
309 st->print(" ");
310 m->signature()->print_value_on(st);
311 st->print(" in ");
312 m->method_holder()->print_value_on(st);
313 if (WizardMode) st->print("[%d,%d]", m->size_of_parameters(), m->max_locals());
314 if (WizardMode && m->code() != NULL) st->print(" ((nmethod*)%p)", m->code());
315 }
317 const char* methodKlass::internal_name() const {
318 return "{method}";
319 }
322 // Verification
324 void methodKlass::oop_verify_on(oop obj, outputStream* st) {
325 Klass::oop_verify_on(obj, st);
326 guarantee(obj->is_method(), "object must be method");
327 if (!obj->partially_loaded()) {
328 methodOop m = methodOop(obj);
329 guarantee(m->is_perm(), "should be in permspace");
330 guarantee(m->constMethod()->is_constMethod(), "should be constMethodOop");
331 guarantee(m->constMethod()->is_perm(), "should be in permspace");
332 methodDataOop method_data = m->method_data();
333 guarantee(method_data == NULL ||
334 method_data->is_perm(), "should be in permspace");
335 guarantee(method_data == NULL ||
336 method_data->is_methodData(), "should be method data");
337 }
338 }
340 bool methodKlass::oop_partially_loaded(oop obj) const {
341 assert(obj->is_method(), "object must be method");
342 methodOop m = methodOop(obj);
343 constMethodOop xconst = m->constMethod();
344 assert(xconst != NULL, "const method must be set");
345 constMethodKlass* ck = constMethodKlass::cast(xconst->klass());
346 return ck->oop_partially_loaded(xconst);
347 }
350 void methodKlass::oop_set_partially_loaded(oop obj) {
351 assert(obj->is_method(), "object must be method");
352 methodOop m = methodOop(obj);
353 constMethodOop xconst = m->constMethod();
354 assert(xconst != NULL, "const method must be set");
355 constMethodKlass* ck = constMethodKlass::cast(xconst->klass());
356 ck->oop_set_partially_loaded(xconst);
357 }