Mercurial > hg > truffle
annotate src/share/vm/oops/constMethodKlass.cpp @ 3746:537a4053b0f9
7042740: CMS: assert(n> q) failed: Looping at: ... blockOffsetTable.cpp:557
Summary: Do a one-step look-ahead, when sweeping free or garbage blocks, to avoid overstepping sweep limit, which may become a non-block-boundary because of a heap expansion delta coalescing with a previously co-terminal free block.
Reviewed-by: brutisso, tonyp
author | ysr |
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date | Mon, 23 May 2011 16:42:14 -0700 |
parents | e5383553fd4e |
children | c124e2e7463e |
rev | line source |
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0 | 1 /* |
2227 | 2 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
1552
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "gc_implementation/shared/markSweep.inline.hpp" | |
27 #include "interpreter/interpreter.hpp" | |
28 #include "memory/gcLocker.hpp" | |
29 #include "memory/resourceArea.hpp" | |
30 #include "oops/constMethodKlass.hpp" | |
31 #include "oops/constMethodOop.hpp" | |
32 #include "oops/oop.inline.hpp" | |
33 #include "oops/oop.inline2.hpp" | |
34 #include "runtime/handles.inline.hpp" | |
0 | 35 |
36 | |
37 klassOop constMethodKlass::create_klass(TRAPS) { | |
38 constMethodKlass o; | |
39 KlassHandle h_this_klass(THREAD, Universe::klassKlassObj()); | |
40 KlassHandle k = base_create_klass(h_this_klass, header_size(), | |
41 o.vtbl_value(), CHECK_NULL); | |
42 // Make sure size calculation is right | |
43 assert(k()->size() == align_object_size(header_size()), | |
44 "wrong size for object"); | |
45 //java_lang_Class::create_mirror(k, CHECK_NULL); // Allocate mirror | |
46 return k(); | |
47 } | |
48 | |
49 | |
50 int constMethodKlass::oop_size(oop obj) const { | |
51 assert(obj->is_constMethod(), "must be constMethod oop"); | |
52 return constMethodOop(obj)->object_size(); | |
53 } | |
54 | |
55 bool constMethodKlass::oop_is_parsable(oop obj) const { | |
56 assert(obj->is_constMethod(), "must be constMethod oop"); | |
57 return constMethodOop(obj)->object_is_parsable(); | |
58 } | |
59 | |
518
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60 bool constMethodKlass::oop_is_conc_safe(oop obj) const { |
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61 assert(obj->is_constMethod(), "must be constMethod oop"); |
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62 return constMethodOop(obj)->is_conc_safe(); |
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63 } |
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64 |
0 | 65 constMethodOop constMethodKlass::allocate(int byte_code_size, |
66 int compressed_line_number_size, | |
67 int localvariable_table_length, | |
68 int checked_exceptions_length, | |
518
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69 bool is_conc_safe, |
0 | 70 TRAPS) { |
71 | |
72 int size = constMethodOopDesc::object_size(byte_code_size, | |
73 compressed_line_number_size, | |
74 localvariable_table_length, | |
75 checked_exceptions_length); | |
76 KlassHandle h_k(THREAD, as_klassOop()); | |
77 constMethodOop cm = (constMethodOop) | |
78 CollectedHeap::permanent_obj_allocate(h_k, size, CHECK_NULL); | |
79 assert(!cm->is_parsable(), "Not yet safely parsable"); | |
80 No_Safepoint_Verifier no_safepoint; | |
81 cm->set_interpreter_kind(Interpreter::invalid); | |
82 cm->init_fingerprint(); | |
83 cm->set_method(NULL); | |
84 cm->set_stackmap_data(NULL); | |
85 cm->set_exception_table(NULL); | |
86 cm->set_code_size(byte_code_size); | |
87 cm->set_constMethod_size(size); | |
88 cm->set_inlined_tables_length(checked_exceptions_length, | |
89 compressed_line_number_size, | |
90 localvariable_table_length); | |
91 assert(cm->size() == size, "wrong size for object"); | |
518
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92 cm->set_is_conc_safe(is_conc_safe); |
0 | 93 cm->set_partially_loaded(); |
94 assert(cm->is_parsable(), "Is safely parsable by gc"); | |
95 return cm; | |
96 } | |
97 | |
98 void constMethodKlass::oop_follow_contents(oop obj) { | |
99 assert (obj->is_constMethod(), "object must be constMethod"); | |
100 constMethodOop cm = constMethodOop(obj); | |
101 MarkSweep::mark_and_push(cm->adr_method()); | |
102 MarkSweep::mark_and_push(cm->adr_stackmap_data()); | |
103 MarkSweep::mark_and_push(cm->adr_exception_table()); | |
104 // Performance tweak: We skip iterating over the klass pointer since we | |
105 // know that Universe::constMethodKlassObj never moves. | |
106 } | |
107 | |
108 #ifndef SERIALGC | |
109 void constMethodKlass::oop_follow_contents(ParCompactionManager* cm, | |
110 oop obj) { | |
111 assert (obj->is_constMethod(), "object must be constMethod"); | |
112 constMethodOop cm_oop = constMethodOop(obj); | |
113 PSParallelCompact::mark_and_push(cm, cm_oop->adr_method()); | |
114 PSParallelCompact::mark_and_push(cm, cm_oop->adr_stackmap_data()); | |
115 PSParallelCompact::mark_and_push(cm, cm_oop->adr_exception_table()); | |
116 // Performance tweak: We skip iterating over the klass pointer since we | |
117 // know that Universe::constMethodKlassObj never moves. | |
118 } | |
119 #endif // SERIALGC | |
120 | |
121 int constMethodKlass::oop_oop_iterate(oop obj, OopClosure* blk) { | |
122 assert (obj->is_constMethod(), "object must be constMethod"); | |
123 constMethodOop cm = constMethodOop(obj); | |
124 blk->do_oop(cm->adr_method()); | |
125 blk->do_oop(cm->adr_stackmap_data()); | |
126 blk->do_oop(cm->adr_exception_table()); | |
127 // Get size before changing pointers. | |
128 // Don't call size() or oop_size() since that is a virtual call. | |
129 int size = cm->object_size(); | |
130 return size; | |
131 } | |
132 | |
133 | |
134 int constMethodKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
135 assert (obj->is_constMethod(), "object must be constMethod"); | |
136 constMethodOop cm = constMethodOop(obj); | |
137 oop* adr; | |
138 adr = cm->adr_method(); | |
139 if (mr.contains(adr)) blk->do_oop(adr); | |
140 adr = cm->adr_stackmap_data(); | |
141 if (mr.contains(adr)) blk->do_oop(adr); | |
142 adr = cm->adr_exception_table(); | |
143 if (mr.contains(adr)) blk->do_oop(adr); | |
144 // Get size before changing pointers. | |
145 // Don't call size() or oop_size() since that is a virtual call. | |
146 int size = cm->object_size(); | |
147 // Performance tweak: We skip iterating over the klass pointer since we | |
148 // know that Universe::constMethodKlassObj never moves. | |
149 return size; | |
150 } | |
151 | |
152 | |
153 int constMethodKlass::oop_adjust_pointers(oop obj) { | |
154 assert(obj->is_constMethod(), "should be constMethod"); | |
155 constMethodOop cm = constMethodOop(obj); | |
156 MarkSweep::adjust_pointer(cm->adr_method()); | |
157 MarkSweep::adjust_pointer(cm->adr_stackmap_data()); | |
158 MarkSweep::adjust_pointer(cm->adr_exception_table()); | |
159 // Get size before changing pointers. | |
160 // Don't call size() or oop_size() since that is a virtual call. | |
161 int size = cm->object_size(); | |
162 // Performance tweak: We skip iterating over the klass pointer since we | |
163 // know that Universe::constMethodKlassObj never moves. | |
164 return size; | |
165 } | |
166 | |
167 #ifndef SERIALGC | |
168 void constMethodKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { | |
169 assert(obj->is_constMethod(), "should be constMethod"); | |
170 } | |
171 | |
172 int constMethodKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { | |
173 assert(obj->is_constMethod(), "should be constMethod"); | |
174 constMethodOop cm_oop = constMethodOop(obj); | |
175 #if 0 | |
176 PSParallelCompact::adjust_pointer(cm_oop->adr_method()); | |
177 PSParallelCompact::adjust_pointer(cm_oop->adr_exception_table()); | |
178 PSParallelCompact::adjust_pointer(cm_oop->adr_stackmap_data()); | |
179 #endif | |
180 oop* const beg_oop = cm_oop->oop_block_beg(); | |
181 oop* const end_oop = cm_oop->oop_block_end(); | |
182 for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) { | |
183 PSParallelCompact::adjust_pointer(cur_oop); | |
184 } | |
185 return cm_oop->object_size(); | |
186 } | |
187 #endif // SERIALGC | |
188 | |
189 // Printing | |
190 | |
191 void constMethodKlass::oop_print_on(oop obj, outputStream* st) { | |
192 ResourceMark rm; | |
193 assert(obj->is_constMethod(), "must be constMethod"); | |
194 Klass::oop_print_on(obj, st); | |
195 constMethodOop m = constMethodOop(obj); | |
196 st->print(" - method: " INTPTR_FORMAT " ", (address)m->method()); | |
197 m->method()->print_value_on(st); st->cr(); | |
198 st->print(" - exceptions: " INTPTR_FORMAT "\n", (address)m->exception_table()); | |
199 if (m->has_stackmap_table()) { | |
200 st->print(" - stackmap data: "); | |
201 m->stackmap_data()->print_value_on(st); | |
202 st->cr(); | |
203 } | |
204 } | |
205 | |
206 // Short version of printing constMethodOop - just print the name of the | |
207 // method it belongs to. | |
208 void constMethodKlass::oop_print_value_on(oop obj, outputStream* st) { | |
209 assert(obj->is_constMethod(), "must be constMethod"); | |
210 constMethodOop m = constMethodOop(obj); | |
211 st->print(" const part of method " ); | |
212 m->method()->print_value_on(st); | |
213 } | |
214 | |
215 const char* constMethodKlass::internal_name() const { | |
216 return "{constMethod}"; | |
217 } | |
218 | |
219 | |
220 // Verification | |
221 | |
222 void constMethodKlass::oop_verify_on(oop obj, outputStream* st) { | |
223 Klass::oop_verify_on(obj, st); | |
224 guarantee(obj->is_constMethod(), "object must be constMethod"); | |
225 constMethodOop m = constMethodOop(obj); | |
226 guarantee(m->is_perm(), "should be in permspace"); | |
227 | |
228 // Verification can occur during oop construction before the method or | |
229 // other fields have been initialized. | |
230 if (!obj->partially_loaded()) { | |
231 guarantee(m->method()->is_perm(), "should be in permspace"); | |
232 guarantee(m->method()->is_method(), "should be method"); | |
233 typeArrayOop stackmap_data = m->stackmap_data(); | |
234 guarantee(stackmap_data == NULL || | |
235 stackmap_data->is_perm(), "should be in permspace"); | |
236 guarantee(m->exception_table()->is_perm(), "should be in permspace"); | |
237 guarantee(m->exception_table()->is_typeArray(), "should be type array"); | |
238 | |
239 address m_end = (address)((oop*) m + m->size()); | |
240 address compressed_table_start = m->code_end(); | |
241 guarantee(compressed_table_start <= m_end, "invalid method layout"); | |
242 address compressed_table_end = compressed_table_start; | |
243 // Verify line number table | |
244 if (m->has_linenumber_table()) { | |
245 CompressedLineNumberReadStream stream(m->compressed_linenumber_table()); | |
246 while (stream.read_pair()) { | |
247 guarantee(stream.bci() >= 0 && stream.bci() <= m->code_size(), "invalid bci in line number table"); | |
248 } | |
249 compressed_table_end += stream.position(); | |
250 } | |
251 guarantee(compressed_table_end <= m_end, "invalid method layout"); | |
252 // Verify checked exceptions and local variable tables | |
253 if (m->has_checked_exceptions()) { | |
254 u2* addr = m->checked_exceptions_length_addr(); | |
255 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); | |
256 } | |
257 if (m->has_localvariable_table()) { | |
258 u2* addr = m->localvariable_table_length_addr(); | |
259 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); | |
260 } | |
261 // Check compressed_table_end relative to uncompressed_table_start | |
262 u2* uncompressed_table_start; | |
263 if (m->has_localvariable_table()) { | |
264 uncompressed_table_start = (u2*) m->localvariable_table_start(); | |
265 } else { | |
266 if (m->has_checked_exceptions()) { | |
267 uncompressed_table_start = (u2*) m->checked_exceptions_start(); | |
268 } else { | |
269 uncompressed_table_start = (u2*) m_end; | |
270 } | |
271 } | |
272 int gap = (intptr_t) uncompressed_table_start - (intptr_t) compressed_table_end; | |
273 int max_gap = align_object_size(1)*BytesPerWord; | |
274 guarantee(gap >= 0 && gap < max_gap, "invalid method layout"); | |
275 } | |
276 } | |
277 | |
278 bool constMethodKlass::oop_partially_loaded(oop obj) const { | |
279 assert(obj->is_constMethod(), "object must be klass"); | |
280 constMethodOop m = constMethodOop(obj); | |
281 // check whether exception_table points to self (flag for partially loaded) | |
282 return m->exception_table() == (typeArrayOop)obj; | |
283 } | |
284 | |
285 | |
286 // The exception_table is the last field set when loading an object. | |
287 void constMethodKlass::oop_set_partially_loaded(oop obj) { | |
288 assert(obj->is_constMethod(), "object must be klass"); | |
289 constMethodOop m = constMethodOop(obj); | |
290 // Temporarily set exception_table to point to self | |
291 m->set_exception_table((typeArrayOop)obj); | |
292 } |