Mercurial > hg > graal-compiler
annotate src/share/vm/code/codeCache.cpp @ 6885:685df3c6f84b
7045397: NPG: Add freelists to class loader arenas.
Reviewed-by: coleenp, stefank, jprovino, ohair
author | jmasa |
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date | Tue, 18 Sep 2012 23:35:42 -0700 |
parents | 8966c2d65d96 |
children | 9deda4d8e126 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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 * | |
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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 "code/codeBlob.hpp" | |
27 #include "code/codeCache.hpp" | |
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28 #include "code/compiledIC.hpp" |
1972 | 29 #include "code/dependencies.hpp" |
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30 #include "code/icBuffer.hpp" |
1972 | 31 #include "code/nmethod.hpp" |
32 #include "code/pcDesc.hpp" | |
33 #include "gc_implementation/shared/markSweep.hpp" | |
34 #include "memory/allocation.inline.hpp" | |
35 #include "memory/gcLocker.hpp" | |
36 #include "memory/iterator.hpp" | |
37 #include "memory/resourceArea.hpp" | |
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38 #include "oops/method.hpp" |
1972 | 39 #include "oops/objArrayOop.hpp" |
40 #include "oops/oop.inline.hpp" | |
41 #include "runtime/handles.inline.hpp" | |
42 #include "runtime/icache.hpp" | |
43 #include "runtime/java.hpp" | |
44 #include "runtime/mutexLocker.hpp" | |
45 #include "services/memoryService.hpp" | |
46 #include "utilities/xmlstream.hpp" | |
0 | 47 |
48 // Helper class for printing in CodeCache | |
49 | |
50 class CodeBlob_sizes { | |
51 private: | |
52 int count; | |
53 int total_size; | |
54 int header_size; | |
55 int code_size; | |
56 int stub_size; | |
57 int relocation_size; | |
58 int scopes_oop_size; | |
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59 int scopes_metadata_size; |
0 | 60 int scopes_data_size; |
61 int scopes_pcs_size; | |
62 | |
63 public: | |
64 CodeBlob_sizes() { | |
65 count = 0; | |
66 total_size = 0; | |
67 header_size = 0; | |
68 code_size = 0; | |
69 stub_size = 0; | |
70 relocation_size = 0; | |
71 scopes_oop_size = 0; | |
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72 scopes_metadata_size = 0; |
0 | 73 scopes_data_size = 0; |
74 scopes_pcs_size = 0; | |
75 } | |
76 | |
77 int total() { return total_size; } | |
78 bool is_empty() { return count == 0; } | |
79 | |
80 void print(const char* title) { | |
81 tty->print_cr(" #%d %s = %dK (hdr %d%%, loc %d%%, code %d%%, stub %d%%, [oops %d%%, data %d%%, pcs %d%%])", | |
82 count, | |
83 title, | |
84 total() / K, | |
85 header_size * 100 / total_size, | |
86 relocation_size * 100 / total_size, | |
87 code_size * 100 / total_size, | |
88 stub_size * 100 / total_size, | |
89 scopes_oop_size * 100 / total_size, | |
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90 scopes_metadata_size * 100 / total_size, |
0 | 91 scopes_data_size * 100 / total_size, |
92 scopes_pcs_size * 100 / total_size); | |
93 } | |
94 | |
95 void add(CodeBlob* cb) { | |
96 count++; | |
97 total_size += cb->size(); | |
98 header_size += cb->header_size(); | |
99 relocation_size += cb->relocation_size(); | |
100 if (cb->is_nmethod()) { | |
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101 nmethod* nm = cb->as_nmethod_or_null(); |
1748 | 102 code_size += nm->insts_size(); |
0 | 103 stub_size += nm->stub_size(); |
104 | |
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105 scopes_oop_size += nm->oops_size(); |
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106 scopes_metadata_size += nm->metadata_size(); |
0 | 107 scopes_data_size += nm->scopes_data_size(); |
108 scopes_pcs_size += nm->scopes_pcs_size(); | |
109 } else { | |
1748 | 110 code_size += cb->code_size(); |
0 | 111 } |
112 } | |
113 }; | |
114 | |
115 | |
116 // CodeCache implementation | |
117 | |
118 CodeHeap * CodeCache::_heap = new CodeHeap(); | |
119 int CodeCache::_number_of_blobs = 0; | |
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120 int CodeCache::_number_of_adapters = 0; |
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121 int CodeCache::_number_of_nmethods = 0; |
0 | 122 int CodeCache::_number_of_nmethods_with_dependencies = 0; |
123 bool CodeCache::_needs_cache_clean = false; | |
989 | 124 nmethod* CodeCache::_scavenge_root_nmethods = NULL; |
1202 | 125 nmethod* CodeCache::_saved_nmethods = NULL; |
0 | 126 |
127 | |
128 CodeBlob* CodeCache::first() { | |
129 assert_locked_or_safepoint(CodeCache_lock); | |
130 return (CodeBlob*)_heap->first(); | |
131 } | |
132 | |
133 | |
134 CodeBlob* CodeCache::next(CodeBlob* cb) { | |
135 assert_locked_or_safepoint(CodeCache_lock); | |
136 return (CodeBlob*)_heap->next(cb); | |
137 } | |
138 | |
139 | |
140 CodeBlob* CodeCache::alive(CodeBlob *cb) { | |
141 assert_locked_or_safepoint(CodeCache_lock); | |
142 while (cb != NULL && !cb->is_alive()) cb = next(cb); | |
143 return cb; | |
144 } | |
145 | |
146 | |
147 nmethod* CodeCache::alive_nmethod(CodeBlob* cb) { | |
148 assert_locked_or_safepoint(CodeCache_lock); | |
149 while (cb != NULL && (!cb->is_alive() || !cb->is_nmethod())) cb = next(cb); | |
150 return (nmethod*)cb; | |
151 } | |
152 | |
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153 nmethod* CodeCache::first_nmethod() { |
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154 assert_locked_or_safepoint(CodeCache_lock); |
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155 CodeBlob* cb = first(); |
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156 while (cb != NULL && !cb->is_nmethod()) { |
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157 cb = next(cb); |
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158 } |
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159 return (nmethod*)cb; |
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160 } |
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161 |
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162 nmethod* CodeCache::next_nmethod (CodeBlob* cb) { |
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163 assert_locked_or_safepoint(CodeCache_lock); |
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164 cb = next(cb); |
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165 while (cb != NULL && !cb->is_nmethod()) { |
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166 cb = next(cb); |
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167 } |
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168 return (nmethod*)cb; |
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169 } |
0 | 170 |
171 CodeBlob* CodeCache::allocate(int size) { | |
172 // Do not seize the CodeCache lock here--if the caller has not | |
173 // already done so, we are going to lose bigtime, since the code | |
174 // cache will contain a garbage CodeBlob until the caller can | |
175 // run the constructor for the CodeBlob subclass he is busy | |
176 // instantiating. | |
177 guarantee(size >= 0, "allocation request must be reasonable"); | |
178 assert_locked_or_safepoint(CodeCache_lock); | |
179 CodeBlob* cb = NULL; | |
180 _number_of_blobs++; | |
181 while (true) { | |
182 cb = (CodeBlob*)_heap->allocate(size); | |
183 if (cb != NULL) break; | |
184 if (!_heap->expand_by(CodeCacheExpansionSize)) { | |
185 // Expansion failed | |
186 return NULL; | |
187 } | |
188 if (PrintCodeCacheExtension) { | |
189 ResourceMark rm; | |
190 tty->print_cr("code cache extended to [" INTPTR_FORMAT ", " INTPTR_FORMAT "] (%d bytes)", | |
191 (intptr_t)_heap->begin(), (intptr_t)_heap->end(), | |
192 (address)_heap->end() - (address)_heap->begin()); | |
193 } | |
194 } | |
195 verify_if_often(); | |
989 | 196 print_trace("allocation", cb, size); |
0 | 197 return cb; |
198 } | |
199 | |
200 void CodeCache::free(CodeBlob* cb) { | |
201 assert_locked_or_safepoint(CodeCache_lock); | |
202 verify_if_often(); | |
203 | |
989 | 204 print_trace("free", cb); |
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205 if (cb->is_nmethod()) { |
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206 _number_of_nmethods--; |
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207 if (((nmethod *)cb)->has_dependencies()) { |
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208 _number_of_nmethods_with_dependencies--; |
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209 } |
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210 } |
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211 if (cb->is_adapter_blob()) { |
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212 _number_of_adapters--; |
0 | 213 } |
214 _number_of_blobs--; | |
215 | |
216 _heap->deallocate(cb); | |
217 | |
218 verify_if_often(); | |
219 assert(_number_of_blobs >= 0, "sanity check"); | |
220 } | |
221 | |
222 | |
223 void CodeCache::commit(CodeBlob* cb) { | |
224 // this is called by nmethod::nmethod, which must already own CodeCache_lock | |
225 assert_locked_or_safepoint(CodeCache_lock); | |
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226 if (cb->is_nmethod()) { |
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227 _number_of_nmethods++; |
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228 if (((nmethod *)cb)->has_dependencies()) { |
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229 _number_of_nmethods_with_dependencies++; |
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230 } |
0 | 231 } |
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232 if (cb->is_adapter_blob()) { |
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233 _number_of_adapters++; |
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234 } |
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235 |
0 | 236 // flush the hardware I-cache |
1748 | 237 ICache::invalidate_range(cb->content_begin(), cb->content_size()); |
0 | 238 } |
239 | |
240 | |
241 void CodeCache::flush() { | |
242 assert_locked_or_safepoint(CodeCache_lock); | |
243 Unimplemented(); | |
244 } | |
245 | |
246 | |
247 // Iteration over CodeBlobs | |
248 | |
249 #define FOR_ALL_BLOBS(var) for (CodeBlob *var = first() ; var != NULL; var = next(var) ) | |
250 #define FOR_ALL_ALIVE_BLOBS(var) for (CodeBlob *var = alive(first()); var != NULL; var = alive(next(var))) | |
251 #define FOR_ALL_ALIVE_NMETHODS(var) for (nmethod *var = alive_nmethod(first()); var != NULL; var = alive_nmethod(next(var))) | |
252 | |
253 | |
254 bool CodeCache::contains(void *p) { | |
255 // It should be ok to call contains without holding a lock | |
256 return _heap->contains(p); | |
257 } | |
258 | |
259 | |
260 // This method is safe to call without holding the CodeCache_lock, as long as a dead codeblob is not | |
261 // looked up (i.e., one that has been marked for deletion). It only dependes on the _segmap to contain | |
262 // valid indices, which it will always do, as long as the CodeBlob is not in the process of being recycled. | |
263 CodeBlob* CodeCache::find_blob(void* start) { | |
264 CodeBlob* result = find_blob_unsafe(start); | |
265 if (result == NULL) return NULL; | |
266 // We could potientially look up non_entrant methods | |
267 guarantee(!result->is_zombie() || result->is_locked_by_vm() || is_error_reported(), "unsafe access to zombie method"); | |
268 return result; | |
269 } | |
270 | |
271 nmethod* CodeCache::find_nmethod(void* start) { | |
272 CodeBlob *cb = find_blob(start); | |
273 assert(cb == NULL || cb->is_nmethod(), "did not find an nmethod"); | |
274 return (nmethod*)cb; | |
275 } | |
276 | |
277 | |
278 void CodeCache::blobs_do(void f(CodeBlob* nm)) { | |
279 assert_locked_or_safepoint(CodeCache_lock); | |
280 FOR_ALL_BLOBS(p) { | |
281 f(p); | |
282 } | |
283 } | |
284 | |
285 | |
286 void CodeCache::nmethods_do(void f(nmethod* nm)) { | |
287 assert_locked_or_safepoint(CodeCache_lock); | |
288 FOR_ALL_BLOBS(nm) { | |
289 if (nm->is_nmethod()) f((nmethod*)nm); | |
290 } | |
291 } | |
292 | |
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293 void CodeCache::alive_nmethods_do(void f(nmethod* nm)) { |
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294 assert_locked_or_safepoint(CodeCache_lock); |
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295 FOR_ALL_ALIVE_NMETHODS(nm) { |
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296 f(nm); |
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297 } |
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298 } |
0 | 299 |
300 int CodeCache::alignment_unit() { | |
301 return (int)_heap->alignment_unit(); | |
302 } | |
303 | |
304 | |
305 int CodeCache::alignment_offset() { | |
306 return (int)_heap->alignment_offset(); | |
307 } | |
308 | |
309 | |
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310 // Mark nmethods for unloading if they contain otherwise unreachable |
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311 // oops. |
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312 void CodeCache::do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred) { |
0 | 313 assert_locked_or_safepoint(CodeCache_lock); |
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314 FOR_ALL_ALIVE_NMETHODS(nm) { |
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315 nm->do_unloading(is_alive, unloading_occurred); |
0 | 316 } |
317 } | |
318 | |
989 | 319 void CodeCache::blobs_do(CodeBlobClosure* f) { |
0 | 320 assert_locked_or_safepoint(CodeCache_lock); |
321 FOR_ALL_ALIVE_BLOBS(cb) { | |
989 | 322 f->do_code_blob(cb); |
323 | |
324 #ifdef ASSERT | |
325 if (cb->is_nmethod()) | |
326 ((nmethod*)cb)->verify_scavenge_root_oops(); | |
327 #endif //ASSERT | |
0 | 328 } |
329 } | |
330 | |
989 | 331 // Walk the list of methods which might contain non-perm oops. |
332 void CodeCache::scavenge_root_nmethods_do(CodeBlobClosure* f) { | |
333 assert_locked_or_safepoint(CodeCache_lock); | |
334 debug_only(mark_scavenge_root_nmethods()); | |
335 | |
336 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
337 debug_only(cur->clear_scavenge_root_marked()); | |
338 assert(cur->scavenge_root_not_marked(), ""); | |
339 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
340 | |
341 bool is_live = (!cur->is_zombie() && !cur->is_unloaded()); | |
342 #ifndef PRODUCT | |
343 if (TraceScavenge) { | |
344 cur->print_on(tty, is_live ? "scavenge root" : "dead scavenge root"); tty->cr(); | |
345 } | |
346 #endif //PRODUCT | |
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347 if (is_live) { |
989 | 348 // Perform cur->oops_do(f), maybe just once per nmethod. |
349 f->do_code_blob(cur); | |
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350 } |
989 | 351 } |
352 | |
353 // Check for stray marks. | |
354 debug_only(verify_perm_nmethods(NULL)); | |
355 } | |
356 | |
357 void CodeCache::add_scavenge_root_nmethod(nmethod* nm) { | |
358 assert_locked_or_safepoint(CodeCache_lock); | |
359 nm->set_on_scavenge_root_list(); | |
360 nm->set_scavenge_root_link(_scavenge_root_nmethods); | |
361 set_scavenge_root_nmethods(nm); | |
362 print_trace("add_scavenge_root", nm); | |
363 } | |
364 | |
365 void CodeCache::drop_scavenge_root_nmethod(nmethod* nm) { | |
366 assert_locked_or_safepoint(CodeCache_lock); | |
367 print_trace("drop_scavenge_root", nm); | |
368 nmethod* last = NULL; | |
369 nmethod* cur = scavenge_root_nmethods(); | |
370 while (cur != NULL) { | |
371 nmethod* next = cur->scavenge_root_link(); | |
372 if (cur == nm) { | |
373 if (last != NULL) | |
374 last->set_scavenge_root_link(next); | |
375 else set_scavenge_root_nmethods(next); | |
376 nm->set_scavenge_root_link(NULL); | |
377 nm->clear_on_scavenge_root_list(); | |
378 return; | |
379 } | |
380 last = cur; | |
381 cur = next; | |
382 } | |
383 assert(false, "should have been on list"); | |
384 } | |
385 | |
386 void CodeCache::prune_scavenge_root_nmethods() { | |
387 assert_locked_or_safepoint(CodeCache_lock); | |
388 debug_only(mark_scavenge_root_nmethods()); | |
389 | |
390 nmethod* last = NULL; | |
391 nmethod* cur = scavenge_root_nmethods(); | |
392 while (cur != NULL) { | |
393 nmethod* next = cur->scavenge_root_link(); | |
394 debug_only(cur->clear_scavenge_root_marked()); | |
395 assert(cur->scavenge_root_not_marked(), ""); | |
396 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
397 | |
398 if (!cur->is_zombie() && !cur->is_unloaded() | |
399 && cur->detect_scavenge_root_oops()) { | |
400 // Keep it. Advance 'last' to prevent deletion. | |
401 last = cur; | |
402 } else { | |
403 // Prune it from the list, so we don't have to look at it any more. | |
404 print_trace("prune_scavenge_root", cur); | |
405 cur->set_scavenge_root_link(NULL); | |
406 cur->clear_on_scavenge_root_list(); | |
407 if (last != NULL) | |
408 last->set_scavenge_root_link(next); | |
409 else set_scavenge_root_nmethods(next); | |
410 } | |
411 cur = next; | |
412 } | |
413 | |
414 // Check for stray marks. | |
415 debug_only(verify_perm_nmethods(NULL)); | |
416 } | |
417 | |
418 #ifndef PRODUCT | |
419 void CodeCache::asserted_non_scavengable_nmethods_do(CodeBlobClosure* f) { | |
420 // While we are here, verify the integrity of the list. | |
421 mark_scavenge_root_nmethods(); | |
422 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
423 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
424 cur->clear_scavenge_root_marked(); | |
425 } | |
426 verify_perm_nmethods(f); | |
427 } | |
428 | |
429 // Temporarily mark nmethods that are claimed to be on the non-perm list. | |
430 void CodeCache::mark_scavenge_root_nmethods() { | |
431 FOR_ALL_ALIVE_BLOBS(cb) { | |
432 if (cb->is_nmethod()) { | |
433 nmethod *nm = (nmethod*)cb; | |
434 assert(nm->scavenge_root_not_marked(), "clean state"); | |
435 if (nm->on_scavenge_root_list()) | |
436 nm->set_scavenge_root_marked(); | |
437 } | |
438 } | |
439 } | |
440 | |
441 // If the closure is given, run it on the unlisted nmethods. | |
442 // Also make sure that the effects of mark_scavenge_root_nmethods is gone. | |
443 void CodeCache::verify_perm_nmethods(CodeBlobClosure* f_or_null) { | |
444 FOR_ALL_ALIVE_BLOBS(cb) { | |
445 bool call_f = (f_or_null != NULL); | |
446 if (cb->is_nmethod()) { | |
447 nmethod *nm = (nmethod*)cb; | |
448 assert(nm->scavenge_root_not_marked(), "must be already processed"); | |
449 if (nm->on_scavenge_root_list()) | |
450 call_f = false; // don't show this one to the client | |
451 nm->verify_scavenge_root_oops(); | |
452 } else { | |
453 call_f = false; // not an nmethod | |
454 } | |
455 if (call_f) f_or_null->do_code_blob(cb); | |
456 } | |
457 } | |
458 #endif //PRODUCT | |
459 | |
1202 | 460 |
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461 nmethod* CodeCache::find_and_remove_saved_code(Method* m) { |
1202 | 462 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
463 nmethod* saved = _saved_nmethods; | |
464 nmethod* prev = NULL; | |
465 while (saved != NULL) { | |
466 if (saved->is_in_use() && saved->method() == m) { | |
467 if (prev != NULL) { | |
468 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
469 } else { | |
470 _saved_nmethods = saved->saved_nmethod_link(); | |
471 } | |
472 assert(saved->is_speculatively_disconnected(), "shouldn't call for other nmethods"); | |
473 saved->set_speculatively_disconnected(false); | |
474 saved->set_saved_nmethod_link(NULL); | |
475 if (PrintMethodFlushing) { | |
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476 saved->print_on(tty, " ### nmethod is reconnected\n"); |
1202 | 477 } |
478 if (LogCompilation && (xtty != NULL)) { | |
479 ttyLocker ttyl; | |
480 xtty->begin_elem("nmethod_reconnected compile_id='%3d'", saved->compile_id()); | |
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481 xtty->method(m); |
1202 | 482 xtty->stamp(); |
483 xtty->end_elem(); | |
484 } | |
485 return saved; | |
486 } | |
487 prev = saved; | |
488 saved = saved->saved_nmethod_link(); | |
489 } | |
490 return NULL; | |
491 } | |
492 | |
493 void CodeCache::remove_saved_code(nmethod* nm) { | |
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494 // For conc swpr this will be called with CodeCache_lock taken by caller |
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495 assert_locked_or_safepoint(CodeCache_lock); |
1202 | 496 assert(nm->is_speculatively_disconnected(), "shouldn't call for other nmethods"); |
497 nmethod* saved = _saved_nmethods; | |
498 nmethod* prev = NULL; | |
499 while (saved != NULL) { | |
500 if (saved == nm) { | |
501 if (prev != NULL) { | |
502 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
503 } else { | |
504 _saved_nmethods = saved->saved_nmethod_link(); | |
505 } | |
506 if (LogCompilation && (xtty != NULL)) { | |
507 ttyLocker ttyl; | |
508 xtty->begin_elem("nmethod_removed compile_id='%3d'", nm->compile_id()); | |
509 xtty->stamp(); | |
510 xtty->end_elem(); | |
511 } | |
512 return; | |
513 } | |
514 prev = saved; | |
515 saved = saved->saved_nmethod_link(); | |
516 } | |
517 ShouldNotReachHere(); | |
518 } | |
519 | |
520 void CodeCache::speculatively_disconnect(nmethod* nm) { | |
521 assert_locked_or_safepoint(CodeCache_lock); | |
522 assert(nm->is_in_use() && !nm->is_speculatively_disconnected(), "should only disconnect live nmethods"); | |
523 nm->set_saved_nmethod_link(_saved_nmethods); | |
524 _saved_nmethods = nm; | |
525 if (PrintMethodFlushing) { | |
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526 nm->print_on(tty, " ### nmethod is speculatively disconnected\n"); |
1202 | 527 } |
528 if (LogCompilation && (xtty != NULL)) { | |
529 ttyLocker ttyl; | |
530 xtty->begin_elem("nmethod_disconnected compile_id='%3d'", nm->compile_id()); | |
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531 xtty->method(nm->method()); |
1202 | 532 xtty->stamp(); |
533 xtty->end_elem(); | |
534 } | |
535 nm->method()->clear_code(); | |
536 nm->set_speculatively_disconnected(true); | |
537 } | |
538 | |
539 | |
0 | 540 void CodeCache::gc_prologue() { |
989 | 541 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_epilogue must be called"); |
0 | 542 } |
543 | |
544 | |
545 void CodeCache::gc_epilogue() { | |
546 assert_locked_or_safepoint(CodeCache_lock); | |
547 FOR_ALL_ALIVE_BLOBS(cb) { | |
548 if (cb->is_nmethod()) { | |
549 nmethod *nm = (nmethod*)cb; | |
550 assert(!nm->is_unloaded(), "Tautology"); | |
551 if (needs_cache_clean()) { | |
552 nm->cleanup_inline_caches(); | |
553 } | |
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554 DEBUG_ONLY(nm->verify()); |
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555 nm->fix_oop_relocations(); |
0 | 556 } |
557 } | |
558 set_needs_cache_clean(false); | |
989 | 559 prune_scavenge_root_nmethods(); |
560 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); | |
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561 |
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562 #ifdef ASSERT |
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563 // make sure that we aren't leaking icholders |
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564 int count = 0; |
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565 FOR_ALL_BLOBS(cb) { |
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566 if (cb->is_nmethod()) { |
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567 RelocIterator iter((nmethod*)cb); |
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568 while(iter.next()) { |
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569 if (iter.type() == relocInfo::virtual_call_type) { |
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570 if (CompiledIC::is_icholder_call_site(iter.virtual_call_reloc())) { |
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571 CompiledIC *ic = CompiledIC_at(iter.reloc()); |
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572 if (TraceCompiledIC) { |
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573 tty->print("noticed icholder " INTPTR_FORMAT " ", ic->cached_icholder()); |
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574 ic->print(); |
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575 } |
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576 assert(ic->cached_icholder() != NULL, "must be non-NULL"); |
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577 count++; |
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578 } |
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579 } |
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580 } |
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581 } |
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582 } |
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583 |
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584 assert(count + InlineCacheBuffer::pending_icholder_count() + CompiledICHolder::live_not_claimed_count() == |
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585 CompiledICHolder::live_count(), "must agree"); |
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586 #endif |
0 | 587 } |
588 | |
589 | |
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590 void CodeCache::verify_oops() { |
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591 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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592 VerifyOopClosure voc; |
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593 FOR_ALL_ALIVE_BLOBS(cb) { |
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594 if (cb->is_nmethod()) { |
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595 nmethod *nm = (nmethod*)cb; |
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596 nm->oops_do(&voc); |
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597 nm->verify_oop_relocations(); |
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598 } |
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599 } |
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600 } |
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601 |
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602 |
0 | 603 address CodeCache::first_address() { |
604 assert_locked_or_safepoint(CodeCache_lock); | |
605 return (address)_heap->begin(); | |
606 } | |
607 | |
608 | |
609 address CodeCache::last_address() { | |
610 assert_locked_or_safepoint(CodeCache_lock); | |
611 return (address)_heap->end(); | |
612 } | |
613 | |
614 | |
615 void icache_init(); | |
616 | |
617 void CodeCache::initialize() { | |
618 assert(CodeCacheSegmentSize >= (uintx)CodeEntryAlignment, "CodeCacheSegmentSize must be large enough to align entry points"); | |
619 #ifdef COMPILER2 | |
620 assert(CodeCacheSegmentSize >= (uintx)OptoLoopAlignment, "CodeCacheSegmentSize must be large enough to align inner loops"); | |
621 #endif | |
622 assert(CodeCacheSegmentSize >= sizeof(jdouble), "CodeCacheSegmentSize must be large enough to align constants"); | |
623 // This was originally just a check of the alignment, causing failure, instead, round | |
624 // the code cache to the page size. In particular, Solaris is moving to a larger | |
625 // default page size. | |
626 CodeCacheExpansionSize = round_to(CodeCacheExpansionSize, os::vm_page_size()); | |
627 InitialCodeCacheSize = round_to(InitialCodeCacheSize, os::vm_page_size()); | |
628 ReservedCodeCacheSize = round_to(ReservedCodeCacheSize, os::vm_page_size()); | |
629 if (!_heap->reserve(ReservedCodeCacheSize, InitialCodeCacheSize, CodeCacheSegmentSize)) { | |
630 vm_exit_during_initialization("Could not reserve enough space for code cache"); | |
631 } | |
632 | |
633 MemoryService::add_code_heap_memory_pool(_heap); | |
634 | |
635 // Initialize ICache flush mechanism | |
636 // This service is needed for os::register_code_area | |
637 icache_init(); | |
638 | |
639 // Give OS a chance to register generated code area. | |
640 // This is used on Windows 64 bit platforms to register | |
641 // Structured Exception Handlers for our generated code. | |
642 os::register_code_area(_heap->low_boundary(), _heap->high_boundary()); | |
643 } | |
644 | |
645 | |
646 void codeCache_init() { | |
647 CodeCache::initialize(); | |
648 } | |
649 | |
650 //------------------------------------------------------------------------------------------------ | |
651 | |
652 int CodeCache::number_of_nmethods_with_dependencies() { | |
653 return _number_of_nmethods_with_dependencies; | |
654 } | |
655 | |
656 void CodeCache::clear_inline_caches() { | |
657 assert_locked_or_safepoint(CodeCache_lock); | |
658 FOR_ALL_ALIVE_NMETHODS(nm) { | |
659 nm->clear_inline_caches(); | |
660 } | |
661 } | |
662 | |
663 #ifndef PRODUCT | |
664 // used to keep track of how much time is spent in mark_for_deoptimization | |
665 static elapsedTimer dependentCheckTime; | |
666 static int dependentCheckCount = 0; | |
667 #endif // PRODUCT | |
668 | |
669 | |
670 int CodeCache::mark_for_deoptimization(DepChange& changes) { | |
671 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
672 | |
673 #ifndef PRODUCT | |
674 dependentCheckTime.start(); | |
675 dependentCheckCount++; | |
676 #endif // PRODUCT | |
677 | |
678 int number_of_marked_CodeBlobs = 0; | |
679 | |
680 // search the hierarchy looking for nmethods which are affected by the loading of this class | |
681 | |
682 // then search the interfaces this class implements looking for nmethods | |
683 // which might be dependent of the fact that an interface only had one | |
684 // implementor. | |
685 | |
686 { No_Safepoint_Verifier nsv; | |
687 for (DepChange::ContextStream str(changes, nsv); str.next(); ) { | |
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688 Klass* d = str.klass(); |
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689 number_of_marked_CodeBlobs += InstanceKlass::cast(d)->mark_dependent_nmethods(changes); |
0 | 690 } |
691 } | |
692 | |
693 if (VerifyDependencies) { | |
694 // Turn off dependency tracing while actually testing deps. | |
695 NOT_PRODUCT( FlagSetting fs(TraceDependencies, false) ); | |
696 FOR_ALL_ALIVE_NMETHODS(nm) { | |
697 if (!nm->is_marked_for_deoptimization() && | |
698 nm->check_all_dependencies()) { | |
699 ResourceMark rm; | |
700 tty->print_cr("Should have been marked for deoptimization:"); | |
701 changes.print(); | |
702 nm->print(); | |
703 nm->print_dependencies(); | |
704 } | |
705 } | |
706 } | |
707 | |
708 #ifndef PRODUCT | |
709 dependentCheckTime.stop(); | |
710 #endif // PRODUCT | |
711 | |
712 return number_of_marked_CodeBlobs; | |
713 } | |
714 | |
715 | |
716 #ifdef HOTSWAP | |
717 int CodeCache::mark_for_evol_deoptimization(instanceKlassHandle dependee) { | |
718 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
719 int number_of_marked_CodeBlobs = 0; | |
720 | |
721 // Deoptimize all methods of the evolving class itself | |
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722 Array<Method*>* old_methods = dependee->methods(); |
0 | 723 for (int i = 0; i < old_methods->length(); i++) { |
724 ResourceMark rm; | |
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725 Method* old_method = old_methods->at(i); |
0 | 726 nmethod *nm = old_method->code(); |
727 if (nm != NULL) { | |
728 nm->mark_for_deoptimization(); | |
729 number_of_marked_CodeBlobs++; | |
730 } | |
731 } | |
732 | |
733 FOR_ALL_ALIVE_NMETHODS(nm) { | |
734 if (nm->is_marked_for_deoptimization()) { | |
735 // ...Already marked in the previous pass; don't count it again. | |
736 } else if (nm->is_evol_dependent_on(dependee())) { | |
737 ResourceMark rm; | |
738 nm->mark_for_deoptimization(); | |
739 number_of_marked_CodeBlobs++; | |
740 } else { | |
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741 // flush caches in case they refer to a redefined Method* |
0 | 742 nm->clear_inline_caches(); |
743 } | |
744 } | |
745 | |
746 return number_of_marked_CodeBlobs; | |
747 } | |
748 #endif // HOTSWAP | |
749 | |
750 | |
751 // Deoptimize all methods | |
752 void CodeCache::mark_all_nmethods_for_deoptimization() { | |
753 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
754 FOR_ALL_ALIVE_NMETHODS(nm) { | |
755 nm->mark_for_deoptimization(); | |
756 } | |
757 } | |
758 | |
759 | |
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760 int CodeCache::mark_for_deoptimization(Method* dependee) { |
0 | 761 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
762 int number_of_marked_CodeBlobs = 0; | |
763 | |
764 FOR_ALL_ALIVE_NMETHODS(nm) { | |
765 if (nm->is_dependent_on_method(dependee)) { | |
766 ResourceMark rm; | |
767 nm->mark_for_deoptimization(); | |
768 number_of_marked_CodeBlobs++; | |
769 } | |
770 } | |
771 | |
772 return number_of_marked_CodeBlobs; | |
773 } | |
774 | |
775 void CodeCache::make_marked_nmethods_zombies() { | |
776 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
777 FOR_ALL_ALIVE_NMETHODS(nm) { | |
778 if (nm->is_marked_for_deoptimization()) { | |
779 | |
780 // If the nmethod has already been made non-entrant and it can be converted | |
781 // then zombie it now. Otherwise make it non-entrant and it will eventually | |
782 // be zombied when it is no longer seen on the stack. Note that the nmethod | |
783 // might be "entrant" and not on the stack and so could be zombied immediately | |
784 // but we can't tell because we don't track it on stack until it becomes | |
785 // non-entrant. | |
786 | |
787 if (nm->is_not_entrant() && nm->can_not_entrant_be_converted()) { | |
788 nm->make_zombie(); | |
789 } else { | |
790 nm->make_not_entrant(); | |
791 } | |
792 } | |
793 } | |
794 } | |
795 | |
796 void CodeCache::make_marked_nmethods_not_entrant() { | |
797 assert_locked_or_safepoint(CodeCache_lock); | |
798 FOR_ALL_ALIVE_NMETHODS(nm) { | |
799 if (nm->is_marked_for_deoptimization()) { | |
800 nm->make_not_entrant(); | |
801 } | |
802 } | |
803 } | |
804 | |
805 void CodeCache::verify() { | |
806 _heap->verify(); | |
807 FOR_ALL_ALIVE_BLOBS(p) { | |
808 p->verify(); | |
809 } | |
810 } | |
811 | |
812 //------------------------------------------------------------------------------------------------ | |
813 // Non-product version | |
814 | |
815 #ifndef PRODUCT | |
816 | |
817 void CodeCache::verify_if_often() { | |
818 if (VerifyCodeCacheOften) { | |
819 _heap->verify(); | |
820 } | |
821 } | |
822 | |
989 | 823 void CodeCache::print_trace(const char* event, CodeBlob* cb, int size) { |
824 if (PrintCodeCache2) { // Need to add a new flag | |
825 ResourceMark rm; | |
826 if (size == 0) size = cb->size(); | |
827 tty->print_cr("CodeCache %s: addr: " INTPTR_FORMAT ", size: 0x%x", event, cb, size); | |
828 } | |
829 } | |
830 | |
0 | 831 void CodeCache::print_internals() { |
832 int nmethodCount = 0; | |
833 int runtimeStubCount = 0; | |
834 int adapterCount = 0; | |
835 int deoptimizationStubCount = 0; | |
836 int uncommonTrapStubCount = 0; | |
837 int bufferBlobCount = 0; | |
838 int total = 0; | |
839 int nmethodAlive = 0; | |
840 int nmethodNotEntrant = 0; | |
841 int nmethodZombie = 0; | |
842 int nmethodUnloaded = 0; | |
843 int nmethodJava = 0; | |
844 int nmethodNative = 0; | |
845 int maxCodeSize = 0; | |
846 ResourceMark rm; | |
847 | |
848 CodeBlob *cb; | |
849 for (cb = first(); cb != NULL; cb = next(cb)) { | |
850 total++; | |
851 if (cb->is_nmethod()) { | |
852 nmethod* nm = (nmethod*)cb; | |
853 | |
854 if (Verbose && nm->method() != NULL) { | |
855 ResourceMark rm; | |
856 char *method_name = nm->method()->name_and_sig_as_C_string(); | |
857 tty->print("%s", method_name); | |
858 if(nm->is_alive()) { tty->print_cr(" alive"); } | |
859 if(nm->is_not_entrant()) { tty->print_cr(" not-entrant"); } | |
860 if(nm->is_zombie()) { tty->print_cr(" zombie"); } | |
861 } | |
862 | |
863 nmethodCount++; | |
864 | |
865 if(nm->is_alive()) { nmethodAlive++; } | |
866 if(nm->is_not_entrant()) { nmethodNotEntrant++; } | |
867 if(nm->is_zombie()) { nmethodZombie++; } | |
868 if(nm->is_unloaded()) { nmethodUnloaded++; } | |
869 if(nm->is_native_method()) { nmethodNative++; } | |
870 | |
871 if(nm->method() != NULL && nm->is_java_method()) { | |
872 nmethodJava++; | |
1748 | 873 if (nm->insts_size() > maxCodeSize) { |
874 maxCodeSize = nm->insts_size(); | |
0 | 875 } |
876 } | |
877 } else if (cb->is_runtime_stub()) { | |
878 runtimeStubCount++; | |
879 } else if (cb->is_deoptimization_stub()) { | |
880 deoptimizationStubCount++; | |
881 } else if (cb->is_uncommon_trap_stub()) { | |
882 uncommonTrapStubCount++; | |
883 } else if (cb->is_adapter_blob()) { | |
884 adapterCount++; | |
885 } else if (cb->is_buffer_blob()) { | |
886 bufferBlobCount++; | |
887 } | |
888 } | |
889 | |
890 int bucketSize = 512; | |
891 int bucketLimit = maxCodeSize / bucketSize + 1; | |
6197 | 892 int *buckets = NEW_C_HEAP_ARRAY(int, bucketLimit, mtCode); |
0 | 893 memset(buckets,0,sizeof(int) * bucketLimit); |
894 | |
895 for (cb = first(); cb != NULL; cb = next(cb)) { | |
896 if (cb->is_nmethod()) { | |
897 nmethod* nm = (nmethod*)cb; | |
898 if(nm->is_java_method()) { | |
1748 | 899 buckets[nm->insts_size() / bucketSize]++; |
0 | 900 } |
901 } | |
902 } | |
903 tty->print_cr("Code Cache Entries (total of %d)",total); | |
904 tty->print_cr("-------------------------------------------------"); | |
905 tty->print_cr("nmethods: %d",nmethodCount); | |
906 tty->print_cr("\talive: %d",nmethodAlive); | |
907 tty->print_cr("\tnot_entrant: %d",nmethodNotEntrant); | |
908 tty->print_cr("\tzombie: %d",nmethodZombie); | |
909 tty->print_cr("\tunloaded: %d",nmethodUnloaded); | |
910 tty->print_cr("\tjava: %d",nmethodJava); | |
911 tty->print_cr("\tnative: %d",nmethodNative); | |
912 tty->print_cr("runtime_stubs: %d",runtimeStubCount); | |
913 tty->print_cr("adapters: %d",adapterCount); | |
914 tty->print_cr("buffer blobs: %d",bufferBlobCount); | |
915 tty->print_cr("deoptimization_stubs: %d",deoptimizationStubCount); | |
916 tty->print_cr("uncommon_traps: %d",uncommonTrapStubCount); | |
917 tty->print_cr("\nnmethod size distribution (non-zombie java)"); | |
918 tty->print_cr("-------------------------------------------------"); | |
919 | |
920 for(int i=0; i<bucketLimit; i++) { | |
921 if(buckets[i] != 0) { | |
922 tty->print("%d - %d bytes",i*bucketSize,(i+1)*bucketSize); | |
923 tty->fill_to(40); | |
924 tty->print_cr("%d",buckets[i]); | |
925 } | |
926 } | |
927 | |
6197 | 928 FREE_C_HEAP_ARRAY(int, buckets, mtCode); |
0 | 929 } |
930 | |
931 void CodeCache::print() { | |
932 CodeBlob_sizes live; | |
933 CodeBlob_sizes dead; | |
934 | |
935 FOR_ALL_BLOBS(p) { | |
936 if (!p->is_alive()) { | |
937 dead.add(p); | |
938 } else { | |
939 live.add(p); | |
940 } | |
941 } | |
942 | |
943 tty->print_cr("CodeCache:"); | |
944 | |
945 tty->print_cr("nmethod dependency checking time %f", dependentCheckTime.seconds(), | |
946 dependentCheckTime.seconds() / dependentCheckCount); | |
947 | |
948 if (!live.is_empty()) { | |
949 live.print("live"); | |
950 } | |
951 if (!dead.is_empty()) { | |
952 dead.print("dead"); | |
953 } | |
954 | |
955 | |
956 if (Verbose) { | |
957 // print the oop_map usage | |
958 int code_size = 0; | |
959 int number_of_blobs = 0; | |
960 int number_of_oop_maps = 0; | |
961 int map_size = 0; | |
962 FOR_ALL_BLOBS(p) { | |
963 if (p->is_alive()) { | |
964 number_of_blobs++; | |
1748 | 965 code_size += p->code_size(); |
0 | 966 OopMapSet* set = p->oop_maps(); |
967 if (set != NULL) { | |
968 number_of_oop_maps += set->size(); | |
1748 | 969 map_size += set->heap_size(); |
0 | 970 } |
971 } | |
972 } | |
973 tty->print_cr("OopMaps"); | |
974 tty->print_cr(" #blobs = %d", number_of_blobs); | |
975 tty->print_cr(" code size = %d", code_size); | |
976 tty->print_cr(" #oop_maps = %d", number_of_oop_maps); | |
977 tty->print_cr(" map size = %d", map_size); | |
978 } | |
979 | |
980 } | |
981 | |
982 #endif // PRODUCT | |
1907 | 983 |
984 void CodeCache::print_bounds(outputStream* st) { | |
985 st->print_cr("Code Cache [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", | |
986 _heap->low_boundary(), | |
987 _heap->high(), | |
988 _heap->high_boundary()); | |
989 st->print_cr(" total_blobs=" UINT32_FORMAT " nmethods=" UINT32_FORMAT | |
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990 " adapters=" UINT32_FORMAT " free_code_cache=" SIZE_FORMAT "Kb" |
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991 " largest_free_block=" SIZE_FORMAT, |
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992 nof_blobs(), nof_nmethods(), nof_adapters(), |
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993 unallocated_capacity()/K, largest_free_block()); |
1907 | 994 } |
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995 |
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996 void CodeCache::log_state(outputStream* st) { |
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997 st->print(" total_blobs='" UINT32_FORMAT "' nmethods='" UINT32_FORMAT "'" |
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998 " adapters='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'" |
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999 " largest_free_block='" SIZE_FORMAT "'", |
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1000 nof_blobs(), nof_nmethods(), nof_adapters(), |
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1001 unallocated_capacity(), largest_free_block()); |
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1002 } |
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1003 |
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1004 size_t CodeCache::largest_free_block() { |
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1005 // This is called both with and without CodeCache_lock held so |
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1006 // handle both cases. |
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1007 if (CodeCache_lock->owned_by_self()) { |
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1008 return _heap->largest_free_block(); |
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1009 } else { |
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1010 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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1011 return _heap->largest_free_block(); |
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1012 } |
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1013 } |