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_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);
90
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
95
96 if (access_flags.is_native()) {
97 m->clear_native_function();
98 m->set_signature_handler(NULL);
99 }
100
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();
106
107 #ifdef TIERED
108 m->set_rate(0);
109 m->set_prev_event_count(0);
110 m->set_prev_time(0);
111 #endif
112
113 assert(m->is_parsable(), "must be parsable here.");
114 assert(m->size() == size, "wrong size for object");
115 // We should not publish an uprasable object's reference
116 // into one that is parsable, since that presents problems
117 // for the concurrent parallel marking and precleaning phases
118 // of concurrent gc (CMS).
119 xconst->set_method(m);
120 return m;
121 }
122
123
124 void methodKlass::oop_follow_contents(oop obj) {
125 assert (obj->is_method(), "object must be method");
126 methodOop m = methodOop(obj);
127 // Performance tweak: We skip iterating over the klass pointer since we
128 // know that Universe::methodKlassObj never moves.
129 MarkSweep::mark_and_push(m->adr_constMethod());
130 MarkSweep::mark_and_push(m->adr_constants());
131 if (m->method_data() != NULL) {
132 MarkSweep::mark_and_push(m->adr_method_data());
133 }
134 }
135
136 #ifndef SERIALGC
137 void methodKlass::oop_follow_contents(ParCompactionManager* cm,
138 oop obj) {
139 assert (obj->is_method(), "object must be method");
140 methodOop m = methodOop(obj);
141 // Performance tweak: We skip iterating over the klass pointer since we
142 // know that Universe::methodKlassObj never moves.
143 PSParallelCompact::mark_and_push(cm, m->adr_constMethod());
144 PSParallelCompact::mark_and_push(cm, m->adr_constants());
145 #ifdef COMPILER2
146 if (m->method_data() != NULL) {
147 PSParallelCompact::mark_and_push(cm, m->adr_method_data());
148 }
149 #endif // COMPILER2
150 }
151 #endif // SERIALGC
152
153 int methodKlass::oop_oop_iterate(oop obj, OopClosure* blk) {
154 assert (obj->is_method(), "object must be method");
155 methodOop m = methodOop(obj);
156 // Get size before changing pointers.
157 // Don't call size() or oop_size() since that is a virtual call.
158 int size = m->object_size();
159 // Performance tweak: We skip iterating over the klass pointer since we
160 // know that Universe::methodKlassObj never moves
161 blk->do_oop(m->adr_constMethod());
162 blk->do_oop(m->adr_constants());
163 if (m->method_data() != NULL) {
164 blk->do_oop(m->adr_method_data());
165 }
166 return size;
167 }
168
169
170 int methodKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
171 assert (obj->is_method(), "object must be method");
172 methodOop m = methodOop(obj);
173 // Get size before changing pointers.
174 // Don't call size() or oop_size() since that is a virtual call.
175 int size = m->object_size();
176 // Performance tweak: We skip iterating over the klass pointer since we
177 // know that Universe::methodKlassObj never moves.
178 oop* adr;
179 adr = m->adr_constMethod();
180 if (mr.contains(adr)) blk->do_oop(adr);
181 adr = m->adr_constants();
182 if (mr.contains(adr)) blk->do_oop(adr);
183 if (m->method_data() != NULL) {
184 adr = m->adr_method_data();
185 if (mr.contains(adr)) blk->do_oop(adr);
186 }
187 return size;
188 }
189
190
191 int methodKlass::oop_adjust_pointers(oop obj) {
192 assert(obj->is_method(), "should be method");
193 methodOop m = methodOop(obj);
194 // Get size before changing pointers.
195 // Don't call size() or oop_size() since that is a virtual call.
196 int size = m->object_size();
197 // Performance tweak: We skip iterating over the klass pointer since we
198 // know that Universe::methodKlassObj never moves.
199 MarkSweep::adjust_pointer(m->adr_constMethod());
200 MarkSweep::adjust_pointer(m->adr_constants());
201 if (m->method_data() != NULL) {
202 MarkSweep::adjust_pointer(m->adr_method_data());
203 }
204 return size;
205 }
206
207 #ifndef SERIALGC
208 void methodKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
209 assert(obj->is_method(), "should be method");
210 }
211
212 int methodKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
213 assert(obj->is_method(), "should be method");
214 methodOop m = methodOop(obj);
215 PSParallelCompact::adjust_pointer(m->adr_constMethod());
216 PSParallelCompact::adjust_pointer(m->adr_constants());
217 #ifdef COMPILER2
218 if (m->method_data() != NULL) {
219 PSParallelCompact::adjust_pointer(m->adr_method_data());
220 }
221 #endif // COMPILER2
222 return m->object_size();
223 }
224 #endif // SERIALGC
225
226 #ifndef PRODUCT
227
228 // Printing
229
230 void methodKlass::oop_print_on(oop obj, outputStream* st) {
231 ResourceMark rm;
232 assert(obj->is_method(), "must be method");
233 Klass::oop_print_on(obj, st);
234 methodOop m = methodOop(obj);
235 // get the effect of PrintOopAddress, always, for methods:
236 st->print_cr(" - this oop: "INTPTR_FORMAT, (intptr_t)m);
237 st->print (" - method holder: "); m->method_holder()->print_value_on(st); st->cr();
238 st->print (" - constants: "INTPTR_FORMAT" ", (address)m->constants());
239 m->constants()->print_value_on(st); st->cr();
240 st->print (" - access: 0x%x ", m->access_flags().as_int()); m->access_flags().print_on(st); st->cr();
241 st->print (" - name: "); m->name()->print_value_on(st); st->cr();
242 st->print (" - signature: "); m->signature()->print_value_on(st); st->cr();
243 st->print_cr(" - max stack: %d", m->max_stack());
244 st->print_cr(" - max locals: %d", m->max_locals());
245 st->print_cr(" - size of params: %d", m->size_of_parameters());
246 st->print_cr(" - method size: %d", m->method_size());
247 if (m->intrinsic_id() != vmIntrinsics::_none)
248 st->print_cr(" - intrinsic id: %d %s", m->intrinsic_id(), vmIntrinsics::name_at(m->intrinsic_id()));
249 if (m->highest_comp_level() != CompLevel_none)
250 st->print_cr(" - highest level: %d", m->highest_comp_level());
251 st->print_cr(" - vtable index: %d", m->_vtable_index);
252 st->print_cr(" - i2i entry: " INTPTR_FORMAT, m->interpreter_entry());
253 st->print_cr(" - adapter: " INTPTR_FORMAT, m->adapter());
254 st->print_cr(" - compiled entry " INTPTR_FORMAT, m->from_compiled_entry());
255 st->print_cr(" - code size: %d", m->code_size());
256 if (m->code_size() != 0) {
257 st->print_cr(" - code start: " INTPTR_FORMAT, m->code_base());
258 st->print_cr(" - code end (excl): " INTPTR_FORMAT, m->code_base() + m->code_size());
259 }
260 if (m->method_data() != NULL) {
261 st->print_cr(" - method data: " INTPTR_FORMAT, (address)m->method_data());
262 }
263 st->print_cr(" - checked ex length: %d", m->checked_exceptions_length());
264 if (m->checked_exceptions_length() > 0) {
265 CheckedExceptionElement* table = m->checked_exceptions_start();
266 st->print_cr(" - checked ex start: " INTPTR_FORMAT, table);
267 if (Verbose) {
268 for (int i = 0; i < m->checked_exceptions_length(); i++) {
269 st->print_cr(" - throws %s", m->constants()->printable_name_at(table[i].class_cp_index));
270 }
271 }
272 }
273 if (m->has_linenumber_table()) {
274 u_char* table = m->compressed_linenumber_table();
275 st->print_cr(" - linenumber start: " INTPTR_FORMAT, table);
276 if (Verbose) {
277 CompressedLineNumberReadStream stream(table);
278 while (stream.read_pair()) {
279 st->print_cr(" - line %d: %d", stream.line(), stream.bci());
280 }
281 }
282 }
283 st->print_cr(" - localvar length: %d", m->localvariable_table_length());
284 if (m->localvariable_table_length() > 0) {
285 LocalVariableTableElement* table = m->localvariable_table_start();
286 st->print_cr(" - localvar start: " INTPTR_FORMAT, table);
287 if (Verbose) {
288 for (int i = 0; i < m->localvariable_table_length(); i++) {
289 int bci = table[i].start_bci;
290 int len = table[i].length;
291 const char* name = m->constants()->printable_name_at(table[i].name_cp_index);
292 const char* desc = m->constants()->printable_name_at(table[i].descriptor_cp_index);
293 int slot = table[i].slot;
294 st->print_cr(" - %s %s bci=%d len=%d slot=%d", desc, name, bci, len, slot);
295 }
296 }
297 }
298 if (m->code() != NULL) {
299 st->print (" - compiled code: ");
300 m->code()->print_value_on(st);
301 st->cr();
302 }
303 if (m->is_method_handle_invoke()) {
304 st->print_cr(" - invoke method type: " INTPTR_FORMAT, (address) m->method_handle_type());
305 // m is classified as native, but it does not have an interesting
306 // native_function or signature handler
307 } else if (m->is_native()) {
308 st->print_cr(" - native function: " INTPTR_FORMAT, m->native_function());
309 st->print_cr(" - signature handler: " INTPTR_FORMAT, m->signature_handler());
310 }
311 }
312
313 #endif //PRODUCT
314
315 void methodKlass::oop_print_value_on(oop obj, outputStream* st) {
316 assert(obj->is_method(), "must be method");
317 Klass::oop_print_value_on(obj, st);
318 methodOop m = methodOop(obj);
319 st->print(" ");
320 m->name()->print_value_on(st);
321 st->print(" ");
322 m->signature()->print_value_on(st);
323 st->print(" in ");
324 m->method_holder()->print_value_on(st);
325 if (WizardMode) st->print("[%d,%d]", m->size_of_parameters(), m->max_locals());
326 if (WizardMode && m->code() != NULL) st->print(" ((nmethod*)%p)", m->code());
327 }
328
329 const char* methodKlass::internal_name() const {
330 return "{method}";
331 }
332
333
334 // Verification
335
336 void methodKlass::oop_verify_on(oop obj, outputStream* st) {
337 Klass::oop_verify_on(obj, st);
338 guarantee(obj->is_method(), "object must be method");
339 if (!obj->partially_loaded()) {
340 methodOop m = methodOop(obj);
341 guarantee(m->is_perm(), "should be in permspace");
342 guarantee(m->constants()->is_perm(), "should be in permspace");
343 guarantee(m->constants()->is_constantPool(), "should be constant pool");
344 guarantee(m->constMethod()->is_constMethod(), "should be constMethodOop");
345 guarantee(m->constMethod()->is_perm(), "should be in permspace");
346 methodDataOop method_data = m->method_data();
347 guarantee(method_data == NULL ||
348 method_data->is_perm(), "should be in permspace");
349 guarantee(method_data == NULL ||
350 method_data->is_methodData(), "should be method data");
351 }
352 }
353
354 bool methodKlass::oop_partially_loaded(oop obj) const {
355 assert(obj->is_method(), "object must be method");
356 methodOop m = methodOop(obj);
357 constMethodOop xconst = m->constMethod();
358 assert(xconst != NULL, "const method must be set");
359 constMethodKlass* ck = constMethodKlass::cast(xconst->klass());
360 return ck->oop_partially_loaded(xconst);
361 }
362
363
364 void methodKlass::oop_set_partially_loaded(oop obj) {
365 assert(obj->is_method(), "object must be method");
366 methodOop m = methodOop(obj);
367 constMethodOop xconst = m->constMethod();
368 assert(xconst != NULL, "const method must be set");
369 constMethodKlass* ck = constMethodKlass::cast(xconst->klass());
370 ck->oop_set_partially_loaded(xconst);
371 }