Mercurial > hg > truffle
annotate src/share/vm/code/codeCache.cpp @ 1375:e0a1a502e402 jdk7-b91
Added tag jdk7-b90 for changeset 605c9707a766
author | mikejwre |
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date | Thu, 22 Apr 2010 16:54:23 -0700 |
parents | ed4f78aa9282 |
children | bfe29ec02863 |
rev | line source |
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0 | 1 /* |
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6940520: CodeCache::scavenge_root_nmethods_do must fix oop relocations
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2 * Copyright 1997-2010 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/_codeCache.cpp.incl" | |
27 | |
28 // Helper class for printing in CodeCache | |
29 | |
30 class CodeBlob_sizes { | |
31 private: | |
32 int count; | |
33 int total_size; | |
34 int header_size; | |
35 int code_size; | |
36 int stub_size; | |
37 int relocation_size; | |
38 int scopes_oop_size; | |
39 int scopes_data_size; | |
40 int scopes_pcs_size; | |
41 | |
42 public: | |
43 CodeBlob_sizes() { | |
44 count = 0; | |
45 total_size = 0; | |
46 header_size = 0; | |
47 code_size = 0; | |
48 stub_size = 0; | |
49 relocation_size = 0; | |
50 scopes_oop_size = 0; | |
51 scopes_data_size = 0; | |
52 scopes_pcs_size = 0; | |
53 } | |
54 | |
55 int total() { return total_size; } | |
56 bool is_empty() { return count == 0; } | |
57 | |
58 void print(const char* title) { | |
59 tty->print_cr(" #%d %s = %dK (hdr %d%%, loc %d%%, code %d%%, stub %d%%, [oops %d%%, data %d%%, pcs %d%%])", | |
60 count, | |
61 title, | |
62 total() / K, | |
63 header_size * 100 / total_size, | |
64 relocation_size * 100 / total_size, | |
65 code_size * 100 / total_size, | |
66 stub_size * 100 / total_size, | |
67 scopes_oop_size * 100 / total_size, | |
68 scopes_data_size * 100 / total_size, | |
69 scopes_pcs_size * 100 / total_size); | |
70 } | |
71 | |
72 void add(CodeBlob* cb) { | |
73 count++; | |
74 total_size += cb->size(); | |
75 header_size += cb->header_size(); | |
76 relocation_size += cb->relocation_size(); | |
77 scopes_oop_size += cb->oops_size(); | |
78 if (cb->is_nmethod()) { | |
79 nmethod *nm = (nmethod*)cb; | |
80 code_size += nm->code_size(); | |
81 stub_size += nm->stub_size(); | |
82 | |
83 scopes_data_size += nm->scopes_data_size(); | |
84 scopes_pcs_size += nm->scopes_pcs_size(); | |
85 } else { | |
86 code_size += cb->instructions_size(); | |
87 } | |
88 } | |
89 }; | |
90 | |
91 | |
92 // CodeCache implementation | |
93 | |
94 CodeHeap * CodeCache::_heap = new CodeHeap(); | |
95 int CodeCache::_number_of_blobs = 0; | |
96 int CodeCache::_number_of_nmethods_with_dependencies = 0; | |
97 bool CodeCache::_needs_cache_clean = false; | |
989 | 98 nmethod* CodeCache::_scavenge_root_nmethods = NULL; |
1202 | 99 nmethod* CodeCache::_saved_nmethods = NULL; |
0 | 100 |
101 | |
102 CodeBlob* CodeCache::first() { | |
103 assert_locked_or_safepoint(CodeCache_lock); | |
104 return (CodeBlob*)_heap->first(); | |
105 } | |
106 | |
107 | |
108 CodeBlob* CodeCache::next(CodeBlob* cb) { | |
109 assert_locked_or_safepoint(CodeCache_lock); | |
110 return (CodeBlob*)_heap->next(cb); | |
111 } | |
112 | |
113 | |
114 CodeBlob* CodeCache::alive(CodeBlob *cb) { | |
115 assert_locked_or_safepoint(CodeCache_lock); | |
116 while (cb != NULL && !cb->is_alive()) cb = next(cb); | |
117 return cb; | |
118 } | |
119 | |
120 | |
121 nmethod* CodeCache::alive_nmethod(CodeBlob* cb) { | |
122 assert_locked_or_safepoint(CodeCache_lock); | |
123 while (cb != NULL && (!cb->is_alive() || !cb->is_nmethod())) cb = next(cb); | |
124 return (nmethod*)cb; | |
125 } | |
126 | |
127 | |
128 CodeBlob* CodeCache::allocate(int size) { | |
129 // Do not seize the CodeCache lock here--if the caller has not | |
130 // already done so, we are going to lose bigtime, since the code | |
131 // cache will contain a garbage CodeBlob until the caller can | |
132 // run the constructor for the CodeBlob subclass he is busy | |
133 // instantiating. | |
134 guarantee(size >= 0, "allocation request must be reasonable"); | |
135 assert_locked_or_safepoint(CodeCache_lock); | |
136 CodeBlob* cb = NULL; | |
137 _number_of_blobs++; | |
138 while (true) { | |
139 cb = (CodeBlob*)_heap->allocate(size); | |
140 if (cb != NULL) break; | |
141 if (!_heap->expand_by(CodeCacheExpansionSize)) { | |
142 // Expansion failed | |
143 return NULL; | |
144 } | |
145 if (PrintCodeCacheExtension) { | |
146 ResourceMark rm; | |
147 tty->print_cr("code cache extended to [" INTPTR_FORMAT ", " INTPTR_FORMAT "] (%d bytes)", | |
148 (intptr_t)_heap->begin(), (intptr_t)_heap->end(), | |
149 (address)_heap->end() - (address)_heap->begin()); | |
150 } | |
151 } | |
152 verify_if_often(); | |
989 | 153 print_trace("allocation", cb, size); |
0 | 154 return cb; |
155 } | |
156 | |
157 void CodeCache::free(CodeBlob* cb) { | |
158 assert_locked_or_safepoint(CodeCache_lock); | |
159 verify_if_often(); | |
160 | |
989 | 161 print_trace("free", cb); |
0 | 162 if (cb->is_nmethod() && ((nmethod *)cb)->has_dependencies()) { |
163 _number_of_nmethods_with_dependencies--; | |
164 } | |
165 _number_of_blobs--; | |
166 | |
167 _heap->deallocate(cb); | |
168 | |
169 verify_if_often(); | |
170 assert(_number_of_blobs >= 0, "sanity check"); | |
171 } | |
172 | |
173 | |
174 void CodeCache::commit(CodeBlob* cb) { | |
175 // this is called by nmethod::nmethod, which must already own CodeCache_lock | |
176 assert_locked_or_safepoint(CodeCache_lock); | |
177 if (cb->is_nmethod() && ((nmethod *)cb)->has_dependencies()) { | |
178 _number_of_nmethods_with_dependencies++; | |
179 } | |
180 // flush the hardware I-cache | |
181 ICache::invalidate_range(cb->instructions_begin(), cb->instructions_size()); | |
182 } | |
183 | |
184 | |
185 void CodeCache::flush() { | |
186 assert_locked_or_safepoint(CodeCache_lock); | |
187 Unimplemented(); | |
188 } | |
189 | |
190 | |
191 // Iteration over CodeBlobs | |
192 | |
193 #define FOR_ALL_BLOBS(var) for (CodeBlob *var = first() ; var != NULL; var = next(var) ) | |
194 #define FOR_ALL_ALIVE_BLOBS(var) for (CodeBlob *var = alive(first()); var != NULL; var = alive(next(var))) | |
195 #define FOR_ALL_ALIVE_NMETHODS(var) for (nmethod *var = alive_nmethod(first()); var != NULL; var = alive_nmethod(next(var))) | |
196 | |
197 | |
198 bool CodeCache::contains(void *p) { | |
199 // It should be ok to call contains without holding a lock | |
200 return _heap->contains(p); | |
201 } | |
202 | |
203 | |
204 // This method is safe to call without holding the CodeCache_lock, as long as a dead codeblob is not | |
205 // looked up (i.e., one that has been marked for deletion). It only dependes on the _segmap to contain | |
206 // valid indices, which it will always do, as long as the CodeBlob is not in the process of being recycled. | |
207 CodeBlob* CodeCache::find_blob(void* start) { | |
208 CodeBlob* result = find_blob_unsafe(start); | |
209 if (result == NULL) return NULL; | |
210 // We could potientially look up non_entrant methods | |
211 guarantee(!result->is_zombie() || result->is_locked_by_vm() || is_error_reported(), "unsafe access to zombie method"); | |
212 return result; | |
213 } | |
214 | |
215 nmethod* CodeCache::find_nmethod(void* start) { | |
216 CodeBlob *cb = find_blob(start); | |
217 assert(cb == NULL || cb->is_nmethod(), "did not find an nmethod"); | |
218 return (nmethod*)cb; | |
219 } | |
220 | |
221 | |
222 void CodeCache::blobs_do(void f(CodeBlob* nm)) { | |
223 assert_locked_or_safepoint(CodeCache_lock); | |
224 FOR_ALL_BLOBS(p) { | |
225 f(p); | |
226 } | |
227 } | |
228 | |
229 | |
230 void CodeCache::nmethods_do(void f(nmethod* nm)) { | |
231 assert_locked_or_safepoint(CodeCache_lock); | |
232 FOR_ALL_BLOBS(nm) { | |
233 if (nm->is_nmethod()) f((nmethod*)nm); | |
234 } | |
235 } | |
236 | |
237 | |
238 int CodeCache::alignment_unit() { | |
239 return (int)_heap->alignment_unit(); | |
240 } | |
241 | |
242 | |
243 int CodeCache::alignment_offset() { | |
244 return (int)_heap->alignment_offset(); | |
245 } | |
246 | |
247 | |
248 // Mark code blobs for unloading if they contain otherwise | |
249 // unreachable oops. | |
250 void CodeCache::do_unloading(BoolObjectClosure* is_alive, | |
251 OopClosure* keep_alive, | |
252 bool unloading_occurred) { | |
253 assert_locked_or_safepoint(CodeCache_lock); | |
254 FOR_ALL_ALIVE_BLOBS(cb) { | |
255 cb->do_unloading(is_alive, keep_alive, unloading_occurred); | |
256 } | |
257 } | |
258 | |
989 | 259 void CodeCache::blobs_do(CodeBlobClosure* f) { |
0 | 260 assert_locked_or_safepoint(CodeCache_lock); |
261 FOR_ALL_ALIVE_BLOBS(cb) { | |
989 | 262 f->do_code_blob(cb); |
263 | |
264 #ifdef ASSERT | |
265 if (cb->is_nmethod()) | |
266 ((nmethod*)cb)->verify_scavenge_root_oops(); | |
267 #endif //ASSERT | |
0 | 268 } |
269 } | |
270 | |
989 | 271 // Walk the list of methods which might contain non-perm oops. |
272 void CodeCache::scavenge_root_nmethods_do(CodeBlobClosure* f) { | |
273 assert_locked_or_safepoint(CodeCache_lock); | |
274 debug_only(mark_scavenge_root_nmethods()); | |
275 | |
276 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
277 debug_only(cur->clear_scavenge_root_marked()); | |
278 assert(cur->scavenge_root_not_marked(), ""); | |
279 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
280 | |
281 bool is_live = (!cur->is_zombie() && !cur->is_unloaded()); | |
282 #ifndef PRODUCT | |
283 if (TraceScavenge) { | |
284 cur->print_on(tty, is_live ? "scavenge root" : "dead scavenge root"); tty->cr(); | |
285 } | |
286 #endif //PRODUCT | |
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287 if (is_live) { |
989 | 288 // Perform cur->oops_do(f), maybe just once per nmethod. |
289 f->do_code_blob(cur); | |
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290 cur->fix_oop_relocations(); |
ed4f78aa9282
6940520: CodeCache::scavenge_root_nmethods_do must fix oop relocations
twisti
parents:
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291 } |
989 | 292 } |
293 | |
294 // Check for stray marks. | |
295 debug_only(verify_perm_nmethods(NULL)); | |
296 } | |
297 | |
298 void CodeCache::add_scavenge_root_nmethod(nmethod* nm) { | |
299 assert_locked_or_safepoint(CodeCache_lock); | |
300 nm->set_on_scavenge_root_list(); | |
301 nm->set_scavenge_root_link(_scavenge_root_nmethods); | |
302 set_scavenge_root_nmethods(nm); | |
303 print_trace("add_scavenge_root", nm); | |
304 } | |
305 | |
306 void CodeCache::drop_scavenge_root_nmethod(nmethod* nm) { | |
307 assert_locked_or_safepoint(CodeCache_lock); | |
308 print_trace("drop_scavenge_root", nm); | |
309 nmethod* last = NULL; | |
310 nmethod* cur = scavenge_root_nmethods(); | |
311 while (cur != NULL) { | |
312 nmethod* next = cur->scavenge_root_link(); | |
313 if (cur == nm) { | |
314 if (last != NULL) | |
315 last->set_scavenge_root_link(next); | |
316 else set_scavenge_root_nmethods(next); | |
317 nm->set_scavenge_root_link(NULL); | |
318 nm->clear_on_scavenge_root_list(); | |
319 return; | |
320 } | |
321 last = cur; | |
322 cur = next; | |
323 } | |
324 assert(false, "should have been on list"); | |
325 } | |
326 | |
327 void CodeCache::prune_scavenge_root_nmethods() { | |
328 assert_locked_or_safepoint(CodeCache_lock); | |
329 debug_only(mark_scavenge_root_nmethods()); | |
330 | |
331 nmethod* last = NULL; | |
332 nmethod* cur = scavenge_root_nmethods(); | |
333 while (cur != NULL) { | |
334 nmethod* next = cur->scavenge_root_link(); | |
335 debug_only(cur->clear_scavenge_root_marked()); | |
336 assert(cur->scavenge_root_not_marked(), ""); | |
337 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
338 | |
339 if (!cur->is_zombie() && !cur->is_unloaded() | |
340 && cur->detect_scavenge_root_oops()) { | |
341 // Keep it. Advance 'last' to prevent deletion. | |
342 last = cur; | |
343 } else { | |
344 // Prune it from the list, so we don't have to look at it any more. | |
345 print_trace("prune_scavenge_root", cur); | |
346 cur->set_scavenge_root_link(NULL); | |
347 cur->clear_on_scavenge_root_list(); | |
348 if (last != NULL) | |
349 last->set_scavenge_root_link(next); | |
350 else set_scavenge_root_nmethods(next); | |
351 } | |
352 cur = next; | |
353 } | |
354 | |
355 // Check for stray marks. | |
356 debug_only(verify_perm_nmethods(NULL)); | |
357 } | |
358 | |
359 #ifndef PRODUCT | |
360 void CodeCache::asserted_non_scavengable_nmethods_do(CodeBlobClosure* f) { | |
361 // While we are here, verify the integrity of the list. | |
362 mark_scavenge_root_nmethods(); | |
363 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
364 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
365 cur->clear_scavenge_root_marked(); | |
366 } | |
367 verify_perm_nmethods(f); | |
368 } | |
369 | |
370 // Temporarily mark nmethods that are claimed to be on the non-perm list. | |
371 void CodeCache::mark_scavenge_root_nmethods() { | |
372 FOR_ALL_ALIVE_BLOBS(cb) { | |
373 if (cb->is_nmethod()) { | |
374 nmethod *nm = (nmethod*)cb; | |
375 assert(nm->scavenge_root_not_marked(), "clean state"); | |
376 if (nm->on_scavenge_root_list()) | |
377 nm->set_scavenge_root_marked(); | |
378 } | |
379 } | |
380 } | |
381 | |
382 // If the closure is given, run it on the unlisted nmethods. | |
383 // Also make sure that the effects of mark_scavenge_root_nmethods is gone. | |
384 void CodeCache::verify_perm_nmethods(CodeBlobClosure* f_or_null) { | |
385 FOR_ALL_ALIVE_BLOBS(cb) { | |
386 bool call_f = (f_or_null != NULL); | |
387 if (cb->is_nmethod()) { | |
388 nmethod *nm = (nmethod*)cb; | |
389 assert(nm->scavenge_root_not_marked(), "must be already processed"); | |
390 if (nm->on_scavenge_root_list()) | |
391 call_f = false; // don't show this one to the client | |
392 nm->verify_scavenge_root_oops(); | |
393 } else { | |
394 call_f = false; // not an nmethod | |
395 } | |
396 if (call_f) f_or_null->do_code_blob(cb); | |
397 } | |
398 } | |
399 #endif //PRODUCT | |
400 | |
1202 | 401 |
402 nmethod* CodeCache::find_and_remove_saved_code(methodOop m) { | |
403 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
404 nmethod* saved = _saved_nmethods; | |
405 nmethod* prev = NULL; | |
406 while (saved != NULL) { | |
407 if (saved->is_in_use() && saved->method() == m) { | |
408 if (prev != NULL) { | |
409 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
410 } else { | |
411 _saved_nmethods = saved->saved_nmethod_link(); | |
412 } | |
413 assert(saved->is_speculatively_disconnected(), "shouldn't call for other nmethods"); | |
414 saved->set_speculatively_disconnected(false); | |
415 saved->set_saved_nmethod_link(NULL); | |
416 if (PrintMethodFlushing) { | |
417 saved->print_on(tty, " ### nmethod is reconnected"); | |
418 } | |
419 if (LogCompilation && (xtty != NULL)) { | |
420 ttyLocker ttyl; | |
421 xtty->begin_elem("nmethod_reconnected compile_id='%3d'", saved->compile_id()); | |
422 xtty->method(methodOop(m)); | |
423 xtty->stamp(); | |
424 xtty->end_elem(); | |
425 } | |
426 return saved; | |
427 } | |
428 prev = saved; | |
429 saved = saved->saved_nmethod_link(); | |
430 } | |
431 return NULL; | |
432 } | |
433 | |
434 void CodeCache::remove_saved_code(nmethod* nm) { | |
435 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
436 assert(nm->is_speculatively_disconnected(), "shouldn't call for other nmethods"); | |
437 nmethod* saved = _saved_nmethods; | |
438 nmethod* prev = NULL; | |
439 while (saved != NULL) { | |
440 if (saved == nm) { | |
441 if (prev != NULL) { | |
442 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
443 } else { | |
444 _saved_nmethods = saved->saved_nmethod_link(); | |
445 } | |
446 if (LogCompilation && (xtty != NULL)) { | |
447 ttyLocker ttyl; | |
448 xtty->begin_elem("nmethod_removed compile_id='%3d'", nm->compile_id()); | |
449 xtty->stamp(); | |
450 xtty->end_elem(); | |
451 } | |
452 return; | |
453 } | |
454 prev = saved; | |
455 saved = saved->saved_nmethod_link(); | |
456 } | |
457 ShouldNotReachHere(); | |
458 } | |
459 | |
460 void CodeCache::speculatively_disconnect(nmethod* nm) { | |
461 assert_locked_or_safepoint(CodeCache_lock); | |
462 assert(nm->is_in_use() && !nm->is_speculatively_disconnected(), "should only disconnect live nmethods"); | |
463 nm->set_saved_nmethod_link(_saved_nmethods); | |
464 _saved_nmethods = nm; | |
465 if (PrintMethodFlushing) { | |
466 nm->print_on(tty, " ### nmethod is speculatively disconnected"); | |
467 } | |
468 if (LogCompilation && (xtty != NULL)) { | |
469 ttyLocker ttyl; | |
470 xtty->begin_elem("nmethod_disconnected compile_id='%3d'", nm->compile_id()); | |
471 xtty->method(methodOop(nm->method())); | |
472 xtty->stamp(); | |
473 xtty->end_elem(); | |
474 } | |
475 nm->method()->clear_code(); | |
476 nm->set_speculatively_disconnected(true); | |
477 } | |
478 | |
479 | |
0 | 480 void CodeCache::gc_prologue() { |
989 | 481 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_epilogue must be called"); |
0 | 482 } |
483 | |
484 | |
485 void CodeCache::gc_epilogue() { | |
486 assert_locked_or_safepoint(CodeCache_lock); | |
487 FOR_ALL_ALIVE_BLOBS(cb) { | |
488 if (cb->is_nmethod()) { | |
489 nmethod *nm = (nmethod*)cb; | |
490 assert(!nm->is_unloaded(), "Tautology"); | |
491 if (needs_cache_clean()) { | |
492 nm->cleanup_inline_caches(); | |
493 } | |
494 debug_only(nm->verify();) | |
495 } | |
496 cb->fix_oop_relocations(); | |
497 } | |
498 set_needs_cache_clean(false); | |
989 | 499 prune_scavenge_root_nmethods(); |
500 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); | |
0 | 501 } |
502 | |
503 | |
504 address CodeCache::first_address() { | |
505 assert_locked_or_safepoint(CodeCache_lock); | |
506 return (address)_heap->begin(); | |
507 } | |
508 | |
509 | |
510 address CodeCache::last_address() { | |
511 assert_locked_or_safepoint(CodeCache_lock); | |
512 return (address)_heap->end(); | |
513 } | |
514 | |
515 | |
516 void icache_init(); | |
517 | |
518 void CodeCache::initialize() { | |
519 assert(CodeCacheSegmentSize >= (uintx)CodeEntryAlignment, "CodeCacheSegmentSize must be large enough to align entry points"); | |
520 #ifdef COMPILER2 | |
521 assert(CodeCacheSegmentSize >= (uintx)OptoLoopAlignment, "CodeCacheSegmentSize must be large enough to align inner loops"); | |
522 #endif | |
523 assert(CodeCacheSegmentSize >= sizeof(jdouble), "CodeCacheSegmentSize must be large enough to align constants"); | |
524 // This was originally just a check of the alignment, causing failure, instead, round | |
525 // the code cache to the page size. In particular, Solaris is moving to a larger | |
526 // default page size. | |
527 CodeCacheExpansionSize = round_to(CodeCacheExpansionSize, os::vm_page_size()); | |
528 InitialCodeCacheSize = round_to(InitialCodeCacheSize, os::vm_page_size()); | |
529 ReservedCodeCacheSize = round_to(ReservedCodeCacheSize, os::vm_page_size()); | |
530 if (!_heap->reserve(ReservedCodeCacheSize, InitialCodeCacheSize, CodeCacheSegmentSize)) { | |
531 vm_exit_during_initialization("Could not reserve enough space for code cache"); | |
532 } | |
533 | |
534 MemoryService::add_code_heap_memory_pool(_heap); | |
535 | |
536 // Initialize ICache flush mechanism | |
537 // This service is needed for os::register_code_area | |
538 icache_init(); | |
539 | |
540 // Give OS a chance to register generated code area. | |
541 // This is used on Windows 64 bit platforms to register | |
542 // Structured Exception Handlers for our generated code. | |
543 os::register_code_area(_heap->low_boundary(), _heap->high_boundary()); | |
544 } | |
545 | |
546 | |
547 void codeCache_init() { | |
548 CodeCache::initialize(); | |
549 } | |
550 | |
551 //------------------------------------------------------------------------------------------------ | |
552 | |
553 int CodeCache::number_of_nmethods_with_dependencies() { | |
554 return _number_of_nmethods_with_dependencies; | |
555 } | |
556 | |
557 void CodeCache::clear_inline_caches() { | |
558 assert_locked_or_safepoint(CodeCache_lock); | |
559 FOR_ALL_ALIVE_NMETHODS(nm) { | |
560 nm->clear_inline_caches(); | |
561 } | |
562 } | |
563 | |
564 #ifndef PRODUCT | |
565 // used to keep track of how much time is spent in mark_for_deoptimization | |
566 static elapsedTimer dependentCheckTime; | |
567 static int dependentCheckCount = 0; | |
568 #endif // PRODUCT | |
569 | |
570 | |
571 int CodeCache::mark_for_deoptimization(DepChange& changes) { | |
572 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
573 | |
574 #ifndef PRODUCT | |
575 dependentCheckTime.start(); | |
576 dependentCheckCount++; | |
577 #endif // PRODUCT | |
578 | |
579 int number_of_marked_CodeBlobs = 0; | |
580 | |
581 // search the hierarchy looking for nmethods which are affected by the loading of this class | |
582 | |
583 // then search the interfaces this class implements looking for nmethods | |
584 // which might be dependent of the fact that an interface only had one | |
585 // implementor. | |
586 | |
587 { No_Safepoint_Verifier nsv; | |
588 for (DepChange::ContextStream str(changes, nsv); str.next(); ) { | |
589 klassOop d = str.klass(); | |
590 number_of_marked_CodeBlobs += instanceKlass::cast(d)->mark_dependent_nmethods(changes); | |
591 } | |
592 } | |
593 | |
594 if (VerifyDependencies) { | |
595 // Turn off dependency tracing while actually testing deps. | |
596 NOT_PRODUCT( FlagSetting fs(TraceDependencies, false) ); | |
597 FOR_ALL_ALIVE_NMETHODS(nm) { | |
598 if (!nm->is_marked_for_deoptimization() && | |
599 nm->check_all_dependencies()) { | |
600 ResourceMark rm; | |
601 tty->print_cr("Should have been marked for deoptimization:"); | |
602 changes.print(); | |
603 nm->print(); | |
604 nm->print_dependencies(); | |
605 } | |
606 } | |
607 } | |
608 | |
609 #ifndef PRODUCT | |
610 dependentCheckTime.stop(); | |
611 #endif // PRODUCT | |
612 | |
613 return number_of_marked_CodeBlobs; | |
614 } | |
615 | |
616 | |
617 #ifdef HOTSWAP | |
618 int CodeCache::mark_for_evol_deoptimization(instanceKlassHandle dependee) { | |
619 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
620 int number_of_marked_CodeBlobs = 0; | |
621 | |
622 // Deoptimize all methods of the evolving class itself | |
623 objArrayOop old_methods = dependee->methods(); | |
624 for (int i = 0; i < old_methods->length(); i++) { | |
625 ResourceMark rm; | |
626 methodOop old_method = (methodOop) old_methods->obj_at(i); | |
627 nmethod *nm = old_method->code(); | |
628 if (nm != NULL) { | |
629 nm->mark_for_deoptimization(); | |
630 number_of_marked_CodeBlobs++; | |
631 } | |
632 } | |
633 | |
634 FOR_ALL_ALIVE_NMETHODS(nm) { | |
635 if (nm->is_marked_for_deoptimization()) { | |
636 // ...Already marked in the previous pass; don't count it again. | |
637 } else if (nm->is_evol_dependent_on(dependee())) { | |
638 ResourceMark rm; | |
639 nm->mark_for_deoptimization(); | |
640 number_of_marked_CodeBlobs++; | |
641 } else { | |
642 // flush caches in case they refer to a redefined methodOop | |
643 nm->clear_inline_caches(); | |
644 } | |
645 } | |
646 | |
647 return number_of_marked_CodeBlobs; | |
648 } | |
649 #endif // HOTSWAP | |
650 | |
651 | |
652 // Deoptimize all methods | |
653 void CodeCache::mark_all_nmethods_for_deoptimization() { | |
654 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
655 FOR_ALL_ALIVE_NMETHODS(nm) { | |
656 nm->mark_for_deoptimization(); | |
657 } | |
658 } | |
659 | |
660 | |
661 int CodeCache::mark_for_deoptimization(methodOop dependee) { | |
662 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
663 int number_of_marked_CodeBlobs = 0; | |
664 | |
665 FOR_ALL_ALIVE_NMETHODS(nm) { | |
666 if (nm->is_dependent_on_method(dependee)) { | |
667 ResourceMark rm; | |
668 nm->mark_for_deoptimization(); | |
669 number_of_marked_CodeBlobs++; | |
670 } | |
671 } | |
672 | |
673 return number_of_marked_CodeBlobs; | |
674 } | |
675 | |
676 void CodeCache::make_marked_nmethods_zombies() { | |
677 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
678 FOR_ALL_ALIVE_NMETHODS(nm) { | |
679 if (nm->is_marked_for_deoptimization()) { | |
680 | |
681 // If the nmethod has already been made non-entrant and it can be converted | |
682 // then zombie it now. Otherwise make it non-entrant and it will eventually | |
683 // be zombied when it is no longer seen on the stack. Note that the nmethod | |
684 // might be "entrant" and not on the stack and so could be zombied immediately | |
685 // but we can't tell because we don't track it on stack until it becomes | |
686 // non-entrant. | |
687 | |
688 if (nm->is_not_entrant() && nm->can_not_entrant_be_converted()) { | |
689 nm->make_zombie(); | |
690 } else { | |
691 nm->make_not_entrant(); | |
692 } | |
693 } | |
694 } | |
695 } | |
696 | |
697 void CodeCache::make_marked_nmethods_not_entrant() { | |
698 assert_locked_or_safepoint(CodeCache_lock); | |
699 FOR_ALL_ALIVE_NMETHODS(nm) { | |
700 if (nm->is_marked_for_deoptimization()) { | |
701 nm->make_not_entrant(); | |
702 } | |
703 } | |
704 } | |
705 | |
706 void CodeCache::verify() { | |
707 _heap->verify(); | |
708 FOR_ALL_ALIVE_BLOBS(p) { | |
709 p->verify(); | |
710 } | |
711 } | |
712 | |
713 //------------------------------------------------------------------------------------------------ | |
714 // Non-product version | |
715 | |
716 #ifndef PRODUCT | |
717 | |
718 void CodeCache::verify_if_often() { | |
719 if (VerifyCodeCacheOften) { | |
720 _heap->verify(); | |
721 } | |
722 } | |
723 | |
989 | 724 void CodeCache::print_trace(const char* event, CodeBlob* cb, int size) { |
725 if (PrintCodeCache2) { // Need to add a new flag | |
726 ResourceMark rm; | |
727 if (size == 0) size = cb->size(); | |
728 tty->print_cr("CodeCache %s: addr: " INTPTR_FORMAT ", size: 0x%x", event, cb, size); | |
729 } | |
730 } | |
731 | |
0 | 732 void CodeCache::print_internals() { |
733 int nmethodCount = 0; | |
734 int runtimeStubCount = 0; | |
735 int adapterCount = 0; | |
736 int deoptimizationStubCount = 0; | |
737 int uncommonTrapStubCount = 0; | |
738 int bufferBlobCount = 0; | |
739 int total = 0; | |
740 int nmethodAlive = 0; | |
741 int nmethodNotEntrant = 0; | |
742 int nmethodZombie = 0; | |
743 int nmethodUnloaded = 0; | |
744 int nmethodJava = 0; | |
745 int nmethodNative = 0; | |
746 int maxCodeSize = 0; | |
747 ResourceMark rm; | |
748 | |
749 CodeBlob *cb; | |
750 for (cb = first(); cb != NULL; cb = next(cb)) { | |
751 total++; | |
752 if (cb->is_nmethod()) { | |
753 nmethod* nm = (nmethod*)cb; | |
754 | |
755 if (Verbose && nm->method() != NULL) { | |
756 ResourceMark rm; | |
757 char *method_name = nm->method()->name_and_sig_as_C_string(); | |
758 tty->print("%s", method_name); | |
759 if(nm->is_alive()) { tty->print_cr(" alive"); } | |
760 if(nm->is_not_entrant()) { tty->print_cr(" not-entrant"); } | |
761 if(nm->is_zombie()) { tty->print_cr(" zombie"); } | |
762 } | |
763 | |
764 nmethodCount++; | |
765 | |
766 if(nm->is_alive()) { nmethodAlive++; } | |
767 if(nm->is_not_entrant()) { nmethodNotEntrant++; } | |
768 if(nm->is_zombie()) { nmethodZombie++; } | |
769 if(nm->is_unloaded()) { nmethodUnloaded++; } | |
770 if(nm->is_native_method()) { nmethodNative++; } | |
771 | |
772 if(nm->method() != NULL && nm->is_java_method()) { | |
773 nmethodJava++; | |
774 if(nm->code_size() > maxCodeSize) { | |
775 maxCodeSize = nm->code_size(); | |
776 } | |
777 } | |
778 } else if (cb->is_runtime_stub()) { | |
779 runtimeStubCount++; | |
780 } else if (cb->is_deoptimization_stub()) { | |
781 deoptimizationStubCount++; | |
782 } else if (cb->is_uncommon_trap_stub()) { | |
783 uncommonTrapStubCount++; | |
784 } else if (cb->is_adapter_blob()) { | |
785 adapterCount++; | |
786 } else if (cb->is_buffer_blob()) { | |
787 bufferBlobCount++; | |
788 } | |
789 } | |
790 | |
791 int bucketSize = 512; | |
792 int bucketLimit = maxCodeSize / bucketSize + 1; | |
793 int *buckets = NEW_C_HEAP_ARRAY(int, bucketLimit); | |
794 memset(buckets,0,sizeof(int) * bucketLimit); | |
795 | |
796 for (cb = first(); cb != NULL; cb = next(cb)) { | |
797 if (cb->is_nmethod()) { | |
798 nmethod* nm = (nmethod*)cb; | |
799 if(nm->is_java_method()) { | |
800 buckets[nm->code_size() / bucketSize]++; | |
801 } | |
802 } | |
803 } | |
804 tty->print_cr("Code Cache Entries (total of %d)",total); | |
805 tty->print_cr("-------------------------------------------------"); | |
806 tty->print_cr("nmethods: %d",nmethodCount); | |
807 tty->print_cr("\talive: %d",nmethodAlive); | |
808 tty->print_cr("\tnot_entrant: %d",nmethodNotEntrant); | |
809 tty->print_cr("\tzombie: %d",nmethodZombie); | |
810 tty->print_cr("\tunloaded: %d",nmethodUnloaded); | |
811 tty->print_cr("\tjava: %d",nmethodJava); | |
812 tty->print_cr("\tnative: %d",nmethodNative); | |
813 tty->print_cr("runtime_stubs: %d",runtimeStubCount); | |
814 tty->print_cr("adapters: %d",adapterCount); | |
815 tty->print_cr("buffer blobs: %d",bufferBlobCount); | |
816 tty->print_cr("deoptimization_stubs: %d",deoptimizationStubCount); | |
817 tty->print_cr("uncommon_traps: %d",uncommonTrapStubCount); | |
818 tty->print_cr("\nnmethod size distribution (non-zombie java)"); | |
819 tty->print_cr("-------------------------------------------------"); | |
820 | |
821 for(int i=0; i<bucketLimit; i++) { | |
822 if(buckets[i] != 0) { | |
823 tty->print("%d - %d bytes",i*bucketSize,(i+1)*bucketSize); | |
824 tty->fill_to(40); | |
825 tty->print_cr("%d",buckets[i]); | |
826 } | |
827 } | |
828 | |
829 FREE_C_HEAP_ARRAY(int, buckets); | |
830 } | |
831 | |
832 void CodeCache::print() { | |
833 CodeBlob_sizes live; | |
834 CodeBlob_sizes dead; | |
835 | |
836 FOR_ALL_BLOBS(p) { | |
837 if (!p->is_alive()) { | |
838 dead.add(p); | |
839 } else { | |
840 live.add(p); | |
841 } | |
842 } | |
843 | |
844 tty->print_cr("CodeCache:"); | |
845 | |
846 tty->print_cr("nmethod dependency checking time %f", dependentCheckTime.seconds(), | |
847 dependentCheckTime.seconds() / dependentCheckCount); | |
848 | |
849 if (!live.is_empty()) { | |
850 live.print("live"); | |
851 } | |
852 if (!dead.is_empty()) { | |
853 dead.print("dead"); | |
854 } | |
855 | |
856 | |
857 if (Verbose) { | |
858 // print the oop_map usage | |
859 int code_size = 0; | |
860 int number_of_blobs = 0; | |
861 int number_of_oop_maps = 0; | |
862 int map_size = 0; | |
863 FOR_ALL_BLOBS(p) { | |
864 if (p->is_alive()) { | |
865 number_of_blobs++; | |
866 code_size += p->instructions_size(); | |
867 OopMapSet* set = p->oop_maps(); | |
868 if (set != NULL) { | |
869 number_of_oop_maps += set->size(); | |
870 map_size += set->heap_size(); | |
871 } | |
872 } | |
873 } | |
874 tty->print_cr("OopMaps"); | |
875 tty->print_cr(" #blobs = %d", number_of_blobs); | |
876 tty->print_cr(" code size = %d", code_size); | |
877 tty->print_cr(" #oop_maps = %d", number_of_oop_maps); | |
878 tty->print_cr(" map size = %d", map_size); | |
879 } | |
880 | |
881 } | |
882 | |
883 #endif // PRODUCT |