Mercurial > hg > truffle
annotate src/share/vm/oops/cpCacheOop.cpp @ 844:bd02caa94611
6862919: Update copyright year
Summary: Update copyright for files that have been modified in 2009, up to 07/09
Reviewed-by: tbell, ohair
author | xdono |
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date | Tue, 28 Jul 2009 12:12:40 -0700 |
parents | be93aad57795 |
children | 389049f3f393 |
rev | line source |
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0 | 1 /* |
844 | 2 * Copyright 1998-2009 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_cpCacheOop.cpp.incl" | |
27 | |
28 | |
29 // Implememtation of ConstantPoolCacheEntry | |
30 | |
31 void ConstantPoolCacheEntry::set_initial_state(int index) { | |
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32 if (constantPoolCacheOopDesc::is_secondary_index(index)) { |
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33 // Hack: The rewriter is trying to say that this entry itself |
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34 // will be a secondary entry. |
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35 int main_index = constantPoolCacheOopDesc::decode_secondary_index(index); |
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36 assert(0 <= main_index && main_index < 0x10000, "sanity check"); |
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37 _indices = (main_index << 16); |
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38 assert(main_entry_index() == main_index, ""); |
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39 return; |
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40 } |
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41 assert(0 < index && index < 0x10000, "sanity check"); |
0 | 42 _indices = index; |
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43 assert(constant_pool_index() == index, ""); |
0 | 44 } |
45 | |
46 | |
47 int ConstantPoolCacheEntry::as_flags(TosState state, bool is_final, | |
48 bool is_vfinal, bool is_volatile, | |
49 bool is_method_interface, bool is_method) { | |
50 int f = state; | |
51 | |
52 assert( state < number_of_states, "Invalid state in as_flags"); | |
53 | |
54 f <<= 1; | |
55 if (is_final) f |= 1; | |
56 f <<= 1; | |
57 if (is_vfinal) f |= 1; | |
58 f <<= 1; | |
59 if (is_volatile) f |= 1; | |
60 f <<= 1; | |
61 if (is_method_interface) f |= 1; | |
62 f <<= 1; | |
63 if (is_method) f |= 1; | |
64 f <<= ConstantPoolCacheEntry::hotSwapBit; | |
65 // Preserve existing flag bit values | |
66 #ifdef ASSERT | |
67 int old_state = ((_flags >> tosBits) & 0x0F); | |
68 assert(old_state == 0 || old_state == state, | |
69 "inconsistent cpCache flags state"); | |
70 #endif | |
71 return (_flags | f) ; | |
72 } | |
73 | |
74 void ConstantPoolCacheEntry::set_bytecode_1(Bytecodes::Code code) { | |
75 #ifdef ASSERT | |
76 // Read once. | |
77 volatile Bytecodes::Code c = bytecode_1(); | |
78 assert(c == 0 || c == code || code == 0, "update must be consistent"); | |
79 #endif | |
80 // Need to flush pending stores here before bytecode is written. | |
81 OrderAccess::release_store_ptr(&_indices, _indices | ((u_char)code << 16)); | |
82 } | |
83 | |
84 void ConstantPoolCacheEntry::set_bytecode_2(Bytecodes::Code code) { | |
85 #ifdef ASSERT | |
86 // Read once. | |
87 volatile Bytecodes::Code c = bytecode_2(); | |
88 assert(c == 0 || c == code || code == 0, "update must be consistent"); | |
89 #endif | |
90 // Need to flush pending stores here before bytecode is written. | |
91 OrderAccess::release_store_ptr(&_indices, _indices | ((u_char)code << 24)); | |
92 } | |
93 | |
94 #ifdef ASSERT | |
95 // It is possible to have two different dummy methodOops created | |
96 // when the resolve code for invoke interface executes concurrently | |
97 // Hence the assertion below is weakened a bit for the invokeinterface | |
98 // case. | |
99 bool ConstantPoolCacheEntry::same_methodOop(oop cur_f1, oop f1) { | |
100 return (cur_f1 == f1 || ((methodOop)cur_f1)->name() == | |
101 ((methodOop)f1)->name() || ((methodOop)cur_f1)->signature() == | |
102 ((methodOop)f1)->signature()); | |
103 } | |
104 #endif | |
105 | |
106 // Note that concurrent update of both bytecodes can leave one of them | |
107 // reset to zero. This is harmless; the interpreter will simply re-resolve | |
108 // the damaged entry. More seriously, the memory synchronization is needed | |
109 // to flush other fields (f1, f2) completely to memory before the bytecodes | |
110 // are updated, lest other processors see a non-zero bytecode but zero f1/f2. | |
111 void ConstantPoolCacheEntry::set_field(Bytecodes::Code get_code, | |
112 Bytecodes::Code put_code, | |
113 KlassHandle field_holder, | |
114 int orig_field_index, | |
115 int field_offset, | |
116 TosState field_type, | |
117 bool is_final, | |
118 bool is_volatile) { | |
119 set_f1(field_holder()); | |
120 set_f2(field_offset); | |
121 // The field index is used by jvm/ti and is the index into fields() array | |
122 // in holder instanceKlass. This is scaled by instanceKlass::next_offset. | |
123 assert((orig_field_index % instanceKlass::next_offset) == 0, "wierd index"); | |
124 const int field_index = orig_field_index / instanceKlass::next_offset; | |
125 assert(field_index <= field_index_mask, | |
126 "field index does not fit in low flag bits"); | |
127 set_flags(as_flags(field_type, is_final, false, is_volatile, false, false) | | |
128 (field_index & field_index_mask)); | |
129 set_bytecode_1(get_code); | |
130 set_bytecode_2(put_code); | |
131 NOT_PRODUCT(verify(tty)); | |
132 } | |
133 | |
134 int ConstantPoolCacheEntry::field_index() const { | |
135 return (_flags & field_index_mask) * instanceKlass::next_offset; | |
136 } | |
137 | |
138 void ConstantPoolCacheEntry::set_method(Bytecodes::Code invoke_code, | |
139 methodHandle method, | |
140 int vtable_index) { | |
141 | |
142 assert(method->interpreter_entry() != NULL, "should have been set at this point"); | |
143 assert(!method->is_obsolete(), "attempt to write obsolete method to cpCache"); | |
144 bool change_to_virtual = (invoke_code == Bytecodes::_invokeinterface); | |
145 | |
146 int byte_no = -1; | |
147 bool needs_vfinal_flag = false; | |
148 switch (invoke_code) { | |
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149 case Bytecodes::_invokedynamic: |
0 | 150 case Bytecodes::_invokevirtual: |
151 case Bytecodes::_invokeinterface: { | |
152 if (method->can_be_statically_bound()) { | |
153 set_f2((intptr_t)method()); | |
154 needs_vfinal_flag = true; | |
155 } else { | |
156 assert(vtable_index >= 0, "valid index"); | |
157 set_f2(vtable_index); | |
158 } | |
159 byte_no = 2; | |
160 break; | |
161 } | |
162 case Bytecodes::_invokespecial: | |
163 // Preserve the value of the vfinal flag on invokevirtual bytecode | |
164 // which may be shared with this constant pool cache entry. | |
165 needs_vfinal_flag = is_resolved(Bytecodes::_invokevirtual) && is_vfinal(); | |
166 // fall through | |
167 case Bytecodes::_invokestatic: | |
168 set_f1(method()); | |
169 byte_no = 1; | |
170 break; | |
171 default: | |
172 ShouldNotReachHere(); | |
173 break; | |
174 } | |
175 | |
176 set_flags(as_flags(as_TosState(method->result_type()), | |
177 method->is_final_method(), | |
178 needs_vfinal_flag, | |
179 false, | |
180 change_to_virtual, | |
181 true)| | |
182 method()->size_of_parameters()); | |
183 | |
184 // Note: byte_no also appears in TemplateTable::resolve. | |
185 if (byte_no == 1) { | |
186 set_bytecode_1(invoke_code); | |
187 } else if (byte_no == 2) { | |
188 if (change_to_virtual) { | |
189 // NOTE: THIS IS A HACK - BE VERY CAREFUL!!! | |
190 // | |
191 // Workaround for the case where we encounter an invokeinterface, but we | |
192 // should really have an _invokevirtual since the resolved method is a | |
193 // virtual method in java.lang.Object. This is a corner case in the spec | |
194 // but is presumably legal. javac does not generate this code. | |
195 // | |
196 // We set bytecode_1() to _invokeinterface, because that is the | |
197 // bytecode # used by the interpreter to see if it is resolved. | |
198 // We set bytecode_2() to _invokevirtual. | |
199 // See also interpreterRuntime.cpp. (8/25/2000) | |
200 // Only set resolved for the invokeinterface case if method is public. | |
201 // Otherwise, the method needs to be reresolved with caller for each | |
202 // interface call. | |
203 if (method->is_public()) set_bytecode_1(invoke_code); | |
204 set_bytecode_2(Bytecodes::_invokevirtual); | |
205 } else { | |
206 set_bytecode_2(invoke_code); | |
207 } | |
208 } else { | |
209 ShouldNotReachHere(); | |
210 } | |
211 NOT_PRODUCT(verify(tty)); | |
212 } | |
213 | |
214 | |
215 void ConstantPoolCacheEntry::set_interface_call(methodHandle method, int index) { | |
216 klassOop interf = method->method_holder(); | |
217 assert(instanceKlass::cast(interf)->is_interface(), "must be an interface"); | |
218 set_f1(interf); | |
219 set_f2(index); | |
220 set_flags(as_flags(as_TosState(method->result_type()), method->is_final_method(), false, false, false, true) | method()->size_of_parameters()); | |
221 set_bytecode_1(Bytecodes::_invokeinterface); | |
222 } | |
223 | |
224 | |
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225 void ConstantPoolCacheEntry::set_dynamic_call(Handle call_site, int extra_data) { |
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226 methodOop method = (methodOop) sun_dyn_CallSiteImpl::vmmethod(call_site()); |
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227 assert(method->is_method(), "must be initialized properly"); |
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228 int param_size = method->size_of_parameters(); |
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229 assert(param_size > 1, "method argument size must include MH.this & initial dynamic receiver"); |
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230 param_size -= 1; // do not count MH.this; it is not stacked for invokedynamic |
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231 if (Atomic::cmpxchg_ptr(call_site(), &_f1, NULL) == NULL) { |
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232 // racing threads might be trying to install their own favorites |
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233 set_f1(call_site()); |
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234 } |
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235 set_f2(extra_data); |
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236 set_flags(as_flags(as_TosState(method->result_type()), method->is_final_method(), false, false, false, true) | param_size); |
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237 // do not do set_bytecode on a secondary CP cache entry |
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238 //set_bytecode_1(Bytecodes::_invokedynamic); |
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239 } |
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240 |
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241 |
0 | 242 class LocalOopClosure: public OopClosure { |
243 private: | |
244 void (*_f)(oop*); | |
245 | |
246 public: | |
247 LocalOopClosure(void f(oop*)) { _f = f; } | |
248 virtual void do_oop(oop* o) { _f(o); } | |
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249 virtual void do_oop(narrowOop *o) { ShouldNotReachHere(); } |
0 | 250 }; |
251 | |
252 | |
253 void ConstantPoolCacheEntry::oops_do(void f(oop*)) { | |
254 LocalOopClosure blk(f); | |
255 oop_iterate(&blk); | |
256 } | |
257 | |
258 | |
259 void ConstantPoolCacheEntry::oop_iterate(OopClosure* blk) { | |
260 assert(in_words(size()) == 4, "check code below - may need adjustment"); | |
261 // field[1] is always oop or NULL | |
262 blk->do_oop((oop*)&_f1); | |
263 if (is_vfinal()) { | |
264 blk->do_oop((oop*)&_f2); | |
265 } | |
266 } | |
267 | |
268 | |
269 void ConstantPoolCacheEntry::oop_iterate_m(OopClosure* blk, MemRegion mr) { | |
270 assert(in_words(size()) == 4, "check code below - may need adjustment"); | |
271 // field[1] is always oop or NULL | |
272 if (mr.contains((oop *)&_f1)) blk->do_oop((oop*)&_f1); | |
273 if (is_vfinal()) { | |
274 if (mr.contains((oop *)&_f2)) blk->do_oop((oop*)&_f2); | |
275 } | |
276 } | |
277 | |
278 | |
279 void ConstantPoolCacheEntry::follow_contents() { | |
280 assert(in_words(size()) == 4, "check code below - may need adjustment"); | |
281 // field[1] is always oop or NULL | |
282 MarkSweep::mark_and_push((oop*)&_f1); | |
283 if (is_vfinal()) { | |
284 MarkSweep::mark_and_push((oop*)&_f2); | |
285 } | |
286 } | |
287 | |
288 #ifndef SERIALGC | |
289 void ConstantPoolCacheEntry::follow_contents(ParCompactionManager* cm) { | |
290 assert(in_words(size()) == 4, "check code below - may need adjustment"); | |
291 // field[1] is always oop or NULL | |
292 PSParallelCompact::mark_and_push(cm, (oop*)&_f1); | |
293 if (is_vfinal()) { | |
294 PSParallelCompact::mark_and_push(cm, (oop*)&_f2); | |
295 } | |
296 } | |
297 #endif // SERIALGC | |
298 | |
299 void ConstantPoolCacheEntry::adjust_pointers() { | |
300 assert(in_words(size()) == 4, "check code below - may need adjustment"); | |
301 // field[1] is always oop or NULL | |
302 MarkSweep::adjust_pointer((oop*)&_f1); | |
303 if (is_vfinal()) { | |
304 MarkSweep::adjust_pointer((oop*)&_f2); | |
305 } | |
306 } | |
307 | |
308 #ifndef SERIALGC | |
309 void ConstantPoolCacheEntry::update_pointers() { | |
310 assert(in_words(size()) == 4, "check code below - may need adjustment"); | |
311 // field[1] is always oop or NULL | |
312 PSParallelCompact::adjust_pointer((oop*)&_f1); | |
313 if (is_vfinal()) { | |
314 PSParallelCompact::adjust_pointer((oop*)&_f2); | |
315 } | |
316 } | |
317 | |
318 void ConstantPoolCacheEntry::update_pointers(HeapWord* beg_addr, | |
319 HeapWord* end_addr) { | |
320 assert(in_words(size()) == 4, "check code below - may need adjustment"); | |
321 // field[1] is always oop or NULL | |
322 PSParallelCompact::adjust_pointer((oop*)&_f1, beg_addr, end_addr); | |
323 if (is_vfinal()) { | |
324 PSParallelCompact::adjust_pointer((oop*)&_f2, beg_addr, end_addr); | |
325 } | |
326 } | |
327 #endif // SERIALGC | |
328 | |
329 // RedefineClasses() API support: | |
330 // If this constantPoolCacheEntry refers to old_method then update it | |
331 // to refer to new_method. | |
332 bool ConstantPoolCacheEntry::adjust_method_entry(methodOop old_method, | |
333 methodOop new_method, bool * trace_name_printed) { | |
334 | |
335 if (is_vfinal()) { | |
336 // virtual and final so f2() contains method ptr instead of vtable index | |
337 if (f2() == (intptr_t)old_method) { | |
338 // match old_method so need an update | |
339 _f2 = (intptr_t)new_method; | |
340 if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { | |
341 if (!(*trace_name_printed)) { | |
342 // RC_TRACE_MESG macro has an embedded ResourceMark | |
343 RC_TRACE_MESG(("adjust: name=%s", | |
344 Klass::cast(old_method->method_holder())->external_name())); | |
345 *trace_name_printed = true; | |
346 } | |
347 // RC_TRACE macro has an embedded ResourceMark | |
348 RC_TRACE(0x00400000, ("cpc vf-entry update: %s(%s)", | |
349 new_method->name()->as_C_string(), | |
350 new_method->signature()->as_C_string())); | |
351 } | |
352 | |
353 return true; | |
354 } | |
355 | |
356 // f1() is not used with virtual entries so bail out | |
357 return false; | |
358 } | |
359 | |
360 if ((oop)_f1 == NULL) { | |
361 // NULL f1() means this is a virtual entry so bail out | |
362 // We are assuming that the vtable index does not need change. | |
363 return false; | |
364 } | |
365 | |
366 if ((oop)_f1 == old_method) { | |
367 _f1 = new_method; | |
368 if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { | |
369 if (!(*trace_name_printed)) { | |
370 // RC_TRACE_MESG macro has an embedded ResourceMark | |
371 RC_TRACE_MESG(("adjust: name=%s", | |
372 Klass::cast(old_method->method_holder())->external_name())); | |
373 *trace_name_printed = true; | |
374 } | |
375 // RC_TRACE macro has an embedded ResourceMark | |
376 RC_TRACE(0x00400000, ("cpc entry update: %s(%s)", | |
377 new_method->name()->as_C_string(), | |
378 new_method->signature()->as_C_string())); | |
379 } | |
380 | |
381 return true; | |
382 } | |
383 | |
384 return false; | |
385 } | |
386 | |
387 bool ConstantPoolCacheEntry::is_interesting_method_entry(klassOop k) { | |
388 if (!is_method_entry()) { | |
389 // not a method entry so not interesting by default | |
390 return false; | |
391 } | |
392 | |
393 methodOop m = NULL; | |
394 if (is_vfinal()) { | |
395 // virtual and final so _f2 contains method ptr instead of vtable index | |
396 m = (methodOop)_f2; | |
397 } else if ((oop)_f1 == NULL) { | |
398 // NULL _f1 means this is a virtual entry so also not interesting | |
399 return false; | |
400 } else { | |
401 if (!((oop)_f1)->is_method()) { | |
402 // _f1 can also contain a klassOop for an interface | |
403 return false; | |
404 } | |
405 m = (methodOop)_f1; | |
406 } | |
407 | |
408 assert(m != NULL && m->is_method(), "sanity check"); | |
409 if (m == NULL || !m->is_method() || m->method_holder() != k) { | |
410 // robustness for above sanity checks or method is not in | |
411 // the interesting class | |
412 return false; | |
413 } | |
414 | |
415 // the method is in the interesting class so the entry is interesting | |
416 return true; | |
417 } | |
418 | |
419 void ConstantPoolCacheEntry::print(outputStream* st, int index) const { | |
420 // print separator | |
421 if (index == 0) tty->print_cr(" -------------"); | |
422 // print entry | |
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423 tty->print_cr("%3d (%08x) ", index, this); |
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424 if (is_secondary_entry()) |
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425 tty->print_cr("[%5d|secondary]", main_entry_index()); |
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426 else |
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427 tty->print_cr("[%02x|%02x|%5d]", bytecode_2(), bytecode_1(), constant_pool_index()); |
0 | 428 tty->print_cr(" [ %08x]", (address)(oop)_f1); |
429 tty->print_cr(" [ %08x]", _f2); | |
430 tty->print_cr(" [ %08x]", _flags); | |
431 tty->print_cr(" -------------"); | |
432 } | |
433 | |
434 void ConstantPoolCacheEntry::verify(outputStream* st) const { | |
435 // not implemented yet | |
436 } | |
437 | |
438 // Implementation of ConstantPoolCache | |
439 | |
440 void constantPoolCacheOopDesc::initialize(intArray& inverse_index_map) { | |
441 assert(inverse_index_map.length() == length(), "inverse index map must have same length as cache"); | |
442 for (int i = 0; i < length(); i++) entry_at(i)->set_initial_state(inverse_index_map[i]); | |
443 } | |
444 | |
445 // RedefineClasses() API support: | |
446 // If any entry of this constantPoolCache points to any of | |
447 // old_methods, replace it with the corresponding new_method. | |
448 void constantPoolCacheOopDesc::adjust_method_entries(methodOop* old_methods, methodOop* new_methods, | |
449 int methods_length, bool * trace_name_printed) { | |
450 | |
451 if (methods_length == 0) { | |
452 // nothing to do if there are no methods | |
453 return; | |
454 } | |
455 | |
456 // get shorthand for the interesting class | |
457 klassOop old_holder = old_methods[0]->method_holder(); | |
458 | |
459 for (int i = 0; i < length(); i++) { | |
460 if (!entry_at(i)->is_interesting_method_entry(old_holder)) { | |
461 // skip uninteresting methods | |
462 continue; | |
463 } | |
464 | |
465 // The constantPoolCache contains entries for several different | |
466 // things, but we only care about methods. In fact, we only care | |
467 // about methods in the same class as the one that contains the | |
468 // old_methods. At this point, we have an interesting entry. | |
469 | |
470 for (int j = 0; j < methods_length; j++) { | |
471 methodOop old_method = old_methods[j]; | |
472 methodOop new_method = new_methods[j]; | |
473 | |
474 if (entry_at(i)->adjust_method_entry(old_method, new_method, | |
475 trace_name_printed)) { | |
476 // current old_method matched this entry and we updated it so | |
477 // break out and get to the next interesting entry if there one | |
478 break; | |
479 } | |
480 } | |
481 } | |
482 } |