1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/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"
41
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 }
51
52
53 int methodKlass::oop_size(oop obj) const {
54 assert(obj->is_method(), "must be method oop");
55 return methodOop(obj)->object_size();
56 }
57
58
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 }
63
64
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.");
72
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_method_data(NULL);
87 m->set_interpreter_throwout_count(0);
88 m->set_vtable_index(methodOopDesc::garbage_vtable_index);
89
90 // Fix and bury in methodOop
91 m->set_interpreter_entry(NULL); // sets i2i entry and from_int
92 m->set_adapter_entry(NULL);
93 m->clear_code(); // from_c/from_i get set to c2i/i2i
94
95 if (access_flags.is_native()) {
96 m->clear_native_function();
97 m->set_signature_handler(NULL);
98 }
99
100 NOT_PRODUCT(m->set_compiled_invocation_count(0);)
101 m->set_interpreter_invocation_count(0);
102 m->invocation_counter()->init();
103 m->backedge_counter()->init();
104 m->clear_number_of_breakpoints();
105
106 #ifdef TIERED
107 m->set_rate(0);
108 m->set_prev_event_count(0);
109 m->set_prev_time(0);
110 #endif
111
112 assert(m->is_parsable(), "must be parsable here.");
113 assert(m->size() == size, "wrong size for object");
114 // We should not publish an uprasable object's reference
115 // into one that is parsable, since that presents problems
116 // for the concurrent parallel marking and precleaning phases
117 // of concurrent gc (CMS).
118 xconst->set_method(m);
119 return m;
120 }
121
122
123 void methodKlass::oop_follow_contents(oop obj) {
124 assert (obj->is_method(), "object must be method");
125 methodOop m = methodOop(obj);
126 // Performance tweak: We skip iterating over the klass pointer since we
127 // know that Universe::methodKlassObj never moves.
128 MarkSweep::mark_and_push(m->adr_constMethod());
129 MarkSweep::mark_and_push(m->adr_constants());
130 if (m->method_data() != NULL) {
131 MarkSweep::mark_and_push(m->adr_method_data());
132 }
133 }
134
135 #ifndef SERIALGC
136 void methodKlass::oop_follow_contents(ParCompactionManager* cm,
137 oop obj) {
138 assert (obj->is_method(), "object must be method");
139 methodOop m = methodOop(obj);
140 // Performance tweak: We skip iterating over the klass pointer since we
141 // know that Universe::methodKlassObj never moves.
142 PSParallelCompact::mark_and_push(cm, m->adr_constMethod());
143 PSParallelCompact::mark_and_push(cm, m->adr_constants());
144 #ifdef COMPILER2
145 if (m->method_data() != NULL) {
146 PSParallelCompact::mark_and_push(cm, m->adr_method_data());
147 }
148 #endif // COMPILER2
149 }
150 #endif // SERIALGC
151
152 int methodKlass::oop_oop_iterate(oop obj, OopClosure* blk) {
153 assert (obj->is_method(), "object must be method");
154 methodOop m = methodOop(obj);
155 // Get size before changing pointers.
156 // Don't call size() or oop_size() since that is a virtual call.
157 int size = m->object_size();
158 // Performance tweak: We skip iterating over the klass pointer since we
159 // know that Universe::methodKlassObj never moves
160 blk->do_oop(m->adr_constMethod());
161 blk->do_oop(m->adr_constants());
162 if (m->method_data() != NULL) {
163 blk->do_oop(m->adr_method_data());
164 }
165 return size;
166 }
167
168
169 int methodKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
170 assert (obj->is_method(), "object must be method");
171 methodOop m = methodOop(obj);
172 // Get size before changing pointers.
173 // Don't call size() or oop_size() since that is a virtual call.
174 int size = m->object_size();
175 // Performance tweak: We skip iterating over the klass pointer since we
176 // know that Universe::methodKlassObj never moves.
177 oop* adr;
178 adr = m->adr_constMethod();
179 if (mr.contains(adr)) blk->do_oop(adr);
180 adr = m->adr_constants();
181 if (mr.contains(adr)) blk->do_oop(adr);
182 if (m->method_data() != NULL) {
183 adr = m->adr_method_data();
184 if (mr.contains(adr)) blk->do_oop(adr);
185 }
186 return size;
187 }
188
189
190 int methodKlass::oop_adjust_pointers(oop obj) {
191 assert(obj->is_method(), "should be method");
192 methodOop m = methodOop(obj);
193 // Get size before changing pointers.
194 // Don't call size() or oop_size() since that is a virtual call.
195 int size = m->object_size();
196 // Performance tweak: We skip iterating over the klass pointer since we
197 // know that Universe::methodKlassObj never moves.
198 MarkSweep::adjust_pointer(m->adr_constMethod());
199 MarkSweep::adjust_pointer(m->adr_constants());
200 if (m->method_data() != NULL) {
201 MarkSweep::adjust_pointer(m->adr_method_data());
202 }
203 return size;
204 }
205
206 #ifndef SERIALGC
207 void methodKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
208 assert(obj->is_method(), "should be method");
209 }
210
211 int methodKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
212 assert(obj->is_method(), "should be method");
213 methodOop m = methodOop(obj);
214 PSParallelCompact::adjust_pointer(m->adr_constMethod());
215 PSParallelCompact::adjust_pointer(m->adr_constants());
216 #ifdef COMPILER2
217 if (m->method_data() != NULL) {
218 PSParallelCompact::adjust_pointer(m->adr_method_data());
219 }
220 #endif // COMPILER2
221 return m->object_size();
222 }
223 #endif // SERIALGC
224
225 #ifndef PRODUCT
226
227 // Printing
228
229 void methodKlass::oop_print_on(oop obj, outputStream* st) {
230 ResourceMark rm;
231 assert(obj->is_method(), "must be method");
232 Klass::oop_print_on(obj, st);
233 methodOop m = methodOop(obj);
234 // get the effect of PrintOopAddress, always, for methods:
235 st->print_cr(" - this oop: "INTPTR_FORMAT, (intptr_t)m);
236 st->print (" - method holder: "); m->method_holder()->print_value_on(st); st->cr();
237 st->print (" - constants: "INTPTR_FORMAT" ", (address)m->constants());
238 m->constants()->print_value_on(st); st->cr();
239 st->print (" - access: 0x%x ", m->access_flags().as_int()); m->access_flags().print_on(st); st->cr();
240 st->print (" - name: "); m->name()->print_value_on(st); st->cr();
241 st->print (" - signature: "); m->signature()->print_value_on(st); st->cr();
242 st->print_cr(" - max stack: %d", m->max_stack());
243 st->print_cr(" - max locals: %d", m->max_locals());
244 st->print_cr(" - size of params: %d", m->size_of_parameters());
245 st->print_cr(" - method size: %d", m->method_size());
246 if (m->intrinsic_id() != vmIntrinsics::_none)
247 st->print_cr(" - intrinsic id: %d %s", m->intrinsic_id(), vmIntrinsics::name_at(m->intrinsic_id()));
248 if (m->highest_comp_level() != CompLevel_none)
249 st->print_cr(" - highest level: %d", m->highest_comp_level());
250 st->print_cr(" - vtable index: %d", m->_vtable_index);
251 st->print_cr(" - i2i entry: " INTPTR_FORMAT, m->interpreter_entry());
252 st->print_cr(" - adapter: " INTPTR_FORMAT, m->adapter());
253 st->print_cr(" - compiled entry " INTPTR_FORMAT, m->from_compiled_entry());
254 st->print_cr(" - code size: %d", m->code_size());
255 if (m->code_size() != 0) {
256 st->print_cr(" - code start: " INTPTR_FORMAT, m->code_base());
257 st->print_cr(" - code end (excl): " INTPTR_FORMAT, m->code_base() + m->code_size());
258 }
259 if (m->method_data() != NULL) {
260 st->print_cr(" - method data: " INTPTR_FORMAT, (address)m->method_data());
261 }
262 st->print_cr(" - checked ex length: %d", m->checked_exceptions_length());
263 if (m->checked_exceptions_length() > 0) {
264 CheckedExceptionElement* table = m->checked_exceptions_start();
265 st->print_cr(" - checked ex start: " INTPTR_FORMAT, table);
266 if (Verbose) {
267 for (int i = 0; i < m->checked_exceptions_length(); i++) {
268 st->print_cr(" - throws %s", m->constants()->printable_name_at(table[i].class_cp_index));
269 }
270 }
271 }
272 if (m->has_linenumber_table()) {
273 u_char* table = m->compressed_linenumber_table();
274 st->print_cr(" - linenumber start: " INTPTR_FORMAT, table);
275 if (Verbose) {
276 CompressedLineNumberReadStream stream(table);
277 while (stream.read_pair()) {
278 st->print_cr(" - line %d: %d", stream.line(), stream.bci());
279 }
280 }
281 }
282 st->print_cr(" - localvar length: %d", m->localvariable_table_length());
283 if (m->localvariable_table_length() > 0) {
284 LocalVariableTableElement* table = m->localvariable_table_start();
285 st->print_cr(" - localvar start: " INTPTR_FORMAT, table);
286 if (Verbose) {
287 for (int i = 0; i < m->localvariable_table_length(); i++) {
288 int bci = table[i].start_bci;
289 int len = table[i].length;
290 const char* name = m->constants()->printable_name_at(table[i].name_cp_index);
291 const char* desc = m->constants()->printable_name_at(table[i].descriptor_cp_index);
292 int slot = table[i].slot;
293 st->print_cr(" - %s %s bci=%d len=%d slot=%d", desc, name, bci, len, slot);
294 }
295 }
296 }
297 if (m->code() != NULL) {
298 st->print (" - compiled code: ");
299 m->code()->print_value_on(st);
300 st->cr();
301 }
302 if (m->is_method_handle_invoke()) {
303 st->print_cr(" - invoke method type: " INTPTR_FORMAT, (address) m->method_handle_type());
304 // m is classified as native, but it does not have an interesting
305 // native_function or signature handler
306 } else if (m->is_native()) {
307 st->print_cr(" - native function: " INTPTR_FORMAT, m->native_function());
308 st->print_cr(" - signature handler: " INTPTR_FORMAT, m->signature_handler());
309 }
310 }
311
312 #endif //PRODUCT
313
314 void methodKlass::oop_print_value_on(oop obj, outputStream* st) {
315 assert(obj->is_method(), "must be method");
316 Klass::oop_print_value_on(obj, st);
317 methodOop m = methodOop(obj);
318 st->print(" ");
319 m->name()->print_value_on(st);
320 st->print(" ");
321 m->signature()->print_value_on(st);
322 st->print(" in ");
323 m->method_holder()->print_value_on(st);
324 if (WizardMode) st->print("[%d,%d]", m->size_of_parameters(), m->max_locals());
325 if (WizardMode && m->code() != NULL) st->print(" ((nmethod*)%p)", m->code());
326 }
327
328 const char* methodKlass::internal_name() const {
329 return "{method}";
330 }
331
332
333 // Verification
334
335 void methodKlass::oop_verify_on(oop obj, outputStream* st) {
336 Klass::oop_verify_on(obj, st);
337 guarantee(obj->is_method(), "object must be method");
338 if (!obj->partially_loaded()) {
339 methodOop m = methodOop(obj);
340 guarantee(m->is_perm(), "should be in permspace");
341 guarantee(m->constants()->is_perm(), "should be in permspace");
342 guarantee(m->constants()->is_constantPool(), "should be constant pool");
343 guarantee(m->constMethod()->is_constMethod(), "should be constMethodOop");
344 guarantee(m->constMethod()->is_perm(), "should be in permspace");
345 methodDataOop method_data = m->method_data();
346 guarantee(method_data == NULL ||
347 method_data->is_perm(), "should be in permspace");
348 guarantee(method_data == NULL ||
349 method_data->is_methodData(), "should be method data");
350 }
351 }
352
353 bool methodKlass::oop_partially_loaded(oop obj) const {
354 assert(obj->is_method(), "object must be method");
355 methodOop m = methodOop(obj);
356 constMethodOop xconst = m->constMethod();
357 assert(xconst != NULL, "const method must be set");
358 constMethodKlass* ck = constMethodKlass::cast(xconst->klass());
359 return ck->oop_partially_loaded(xconst);
360 }
361
362
363 void methodKlass::oop_set_partially_loaded(oop obj) {
364 assert(obj->is_method(), "object must be method");
365 methodOop m = methodOop(obj);
366 constMethodOop xconst = m->constMethod();
367 assert(xconst != NULL, "const method must be set");
368 constMethodKlass* ck = constMethodKlass::cast(xconst->klass());
369 ck->oop_set_partially_loaded(xconst);
370 }