Mercurial > hg > truffle
annotate src/share/vm/code/codeCache.cpp @ 6800:9191895df19d
7200001: failed C1 OSR compile doesn't get recompiled with C2
Reviewed-by: kvn
author | twisti |
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date | Mon, 24 Sep 2012 17:59:24 -0700 |
parents | da91efe96a93 |
children | 8966c2d65d96 |
rev | line source |
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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. |
0 | 312 void CodeCache::do_unloading(BoolObjectClosure* is_alive, |
313 OopClosure* keep_alive, | |
314 bool unloading_occurred) { | |
315 assert_locked_or_safepoint(CodeCache_lock); | |
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316 FOR_ALL_ALIVE_NMETHODS(nm) { |
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317 nm->do_unloading(is_alive, keep_alive, unloading_occurred); |
0 | 318 } |
319 } | |
320 | |
989 | 321 void CodeCache::blobs_do(CodeBlobClosure* f) { |
0 | 322 assert_locked_or_safepoint(CodeCache_lock); |
323 FOR_ALL_ALIVE_BLOBS(cb) { | |
989 | 324 f->do_code_blob(cb); |
325 | |
326 #ifdef ASSERT | |
327 if (cb->is_nmethod()) | |
328 ((nmethod*)cb)->verify_scavenge_root_oops(); | |
329 #endif //ASSERT | |
0 | 330 } |
331 } | |
332 | |
989 | 333 // Walk the list of methods which might contain non-perm oops. |
334 void CodeCache::scavenge_root_nmethods_do(CodeBlobClosure* f) { | |
335 assert_locked_or_safepoint(CodeCache_lock); | |
336 debug_only(mark_scavenge_root_nmethods()); | |
337 | |
338 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
339 debug_only(cur->clear_scavenge_root_marked()); | |
340 assert(cur->scavenge_root_not_marked(), ""); | |
341 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
342 | |
343 bool is_live = (!cur->is_zombie() && !cur->is_unloaded()); | |
344 #ifndef PRODUCT | |
345 if (TraceScavenge) { | |
346 cur->print_on(tty, is_live ? "scavenge root" : "dead scavenge root"); tty->cr(); | |
347 } | |
348 #endif //PRODUCT | |
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349 if (is_live) { |
989 | 350 // Perform cur->oops_do(f), maybe just once per nmethod. |
351 f->do_code_blob(cur); | |
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352 } |
989 | 353 } |
354 | |
355 // Check for stray marks. | |
356 debug_only(verify_perm_nmethods(NULL)); | |
357 } | |
358 | |
359 void CodeCache::add_scavenge_root_nmethod(nmethod* nm) { | |
360 assert_locked_or_safepoint(CodeCache_lock); | |
361 nm->set_on_scavenge_root_list(); | |
362 nm->set_scavenge_root_link(_scavenge_root_nmethods); | |
363 set_scavenge_root_nmethods(nm); | |
364 print_trace("add_scavenge_root", nm); | |
365 } | |
366 | |
367 void CodeCache::drop_scavenge_root_nmethod(nmethod* nm) { | |
368 assert_locked_or_safepoint(CodeCache_lock); | |
369 print_trace("drop_scavenge_root", nm); | |
370 nmethod* last = NULL; | |
371 nmethod* cur = scavenge_root_nmethods(); | |
372 while (cur != NULL) { | |
373 nmethod* next = cur->scavenge_root_link(); | |
374 if (cur == nm) { | |
375 if (last != NULL) | |
376 last->set_scavenge_root_link(next); | |
377 else set_scavenge_root_nmethods(next); | |
378 nm->set_scavenge_root_link(NULL); | |
379 nm->clear_on_scavenge_root_list(); | |
380 return; | |
381 } | |
382 last = cur; | |
383 cur = next; | |
384 } | |
385 assert(false, "should have been on list"); | |
386 } | |
387 | |
388 void CodeCache::prune_scavenge_root_nmethods() { | |
389 assert_locked_or_safepoint(CodeCache_lock); | |
390 debug_only(mark_scavenge_root_nmethods()); | |
391 | |
392 nmethod* last = NULL; | |
393 nmethod* cur = scavenge_root_nmethods(); | |
394 while (cur != NULL) { | |
395 nmethod* next = cur->scavenge_root_link(); | |
396 debug_only(cur->clear_scavenge_root_marked()); | |
397 assert(cur->scavenge_root_not_marked(), ""); | |
398 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
399 | |
400 if (!cur->is_zombie() && !cur->is_unloaded() | |
401 && cur->detect_scavenge_root_oops()) { | |
402 // Keep it. Advance 'last' to prevent deletion. | |
403 last = cur; | |
404 } else { | |
405 // Prune it from the list, so we don't have to look at it any more. | |
406 print_trace("prune_scavenge_root", cur); | |
407 cur->set_scavenge_root_link(NULL); | |
408 cur->clear_on_scavenge_root_list(); | |
409 if (last != NULL) | |
410 last->set_scavenge_root_link(next); | |
411 else set_scavenge_root_nmethods(next); | |
412 } | |
413 cur = next; | |
414 } | |
415 | |
416 // Check for stray marks. | |
417 debug_only(verify_perm_nmethods(NULL)); | |
418 } | |
419 | |
420 #ifndef PRODUCT | |
421 void CodeCache::asserted_non_scavengable_nmethods_do(CodeBlobClosure* f) { | |
422 // While we are here, verify the integrity of the list. | |
423 mark_scavenge_root_nmethods(); | |
424 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
425 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
426 cur->clear_scavenge_root_marked(); | |
427 } | |
428 verify_perm_nmethods(f); | |
429 } | |
430 | |
431 // Temporarily mark nmethods that are claimed to be on the non-perm list. | |
432 void CodeCache::mark_scavenge_root_nmethods() { | |
433 FOR_ALL_ALIVE_BLOBS(cb) { | |
434 if (cb->is_nmethod()) { | |
435 nmethod *nm = (nmethod*)cb; | |
436 assert(nm->scavenge_root_not_marked(), "clean state"); | |
437 if (nm->on_scavenge_root_list()) | |
438 nm->set_scavenge_root_marked(); | |
439 } | |
440 } | |
441 } | |
442 | |
443 // If the closure is given, run it on the unlisted nmethods. | |
444 // Also make sure that the effects of mark_scavenge_root_nmethods is gone. | |
445 void CodeCache::verify_perm_nmethods(CodeBlobClosure* f_or_null) { | |
446 FOR_ALL_ALIVE_BLOBS(cb) { | |
447 bool call_f = (f_or_null != NULL); | |
448 if (cb->is_nmethod()) { | |
449 nmethod *nm = (nmethod*)cb; | |
450 assert(nm->scavenge_root_not_marked(), "must be already processed"); | |
451 if (nm->on_scavenge_root_list()) | |
452 call_f = false; // don't show this one to the client | |
453 nm->verify_scavenge_root_oops(); | |
454 } else { | |
455 call_f = false; // not an nmethod | |
456 } | |
457 if (call_f) f_or_null->do_code_blob(cb); | |
458 } | |
459 } | |
460 #endif //PRODUCT | |
461 | |
1202 | 462 |
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463 nmethod* CodeCache::find_and_remove_saved_code(Method* m) { |
1202 | 464 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
465 nmethod* saved = _saved_nmethods; | |
466 nmethod* prev = NULL; | |
467 while (saved != NULL) { | |
468 if (saved->is_in_use() && saved->method() == m) { | |
469 if (prev != NULL) { | |
470 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
471 } else { | |
472 _saved_nmethods = saved->saved_nmethod_link(); | |
473 } | |
474 assert(saved->is_speculatively_disconnected(), "shouldn't call for other nmethods"); | |
475 saved->set_speculatively_disconnected(false); | |
476 saved->set_saved_nmethod_link(NULL); | |
477 if (PrintMethodFlushing) { | |
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478 saved->print_on(tty, " ### nmethod is reconnected\n"); |
1202 | 479 } |
480 if (LogCompilation && (xtty != NULL)) { | |
481 ttyLocker ttyl; | |
482 xtty->begin_elem("nmethod_reconnected compile_id='%3d'", saved->compile_id()); | |
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483 xtty->method(m); |
1202 | 484 xtty->stamp(); |
485 xtty->end_elem(); | |
486 } | |
487 return saved; | |
488 } | |
489 prev = saved; | |
490 saved = saved->saved_nmethod_link(); | |
491 } | |
492 return NULL; | |
493 } | |
494 | |
495 void CodeCache::remove_saved_code(nmethod* nm) { | |
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496 // For conc swpr this will be called with CodeCache_lock taken by caller |
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497 assert_locked_or_safepoint(CodeCache_lock); |
1202 | 498 assert(nm->is_speculatively_disconnected(), "shouldn't call for other nmethods"); |
499 nmethod* saved = _saved_nmethods; | |
500 nmethod* prev = NULL; | |
501 while (saved != NULL) { | |
502 if (saved == nm) { | |
503 if (prev != NULL) { | |
504 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
505 } else { | |
506 _saved_nmethods = saved->saved_nmethod_link(); | |
507 } | |
508 if (LogCompilation && (xtty != NULL)) { | |
509 ttyLocker ttyl; | |
510 xtty->begin_elem("nmethod_removed compile_id='%3d'", nm->compile_id()); | |
511 xtty->stamp(); | |
512 xtty->end_elem(); | |
513 } | |
514 return; | |
515 } | |
516 prev = saved; | |
517 saved = saved->saved_nmethod_link(); | |
518 } | |
519 ShouldNotReachHere(); | |
520 } | |
521 | |
522 void CodeCache::speculatively_disconnect(nmethod* nm) { | |
523 assert_locked_or_safepoint(CodeCache_lock); | |
524 assert(nm->is_in_use() && !nm->is_speculatively_disconnected(), "should only disconnect live nmethods"); | |
525 nm->set_saved_nmethod_link(_saved_nmethods); | |
526 _saved_nmethods = nm; | |
527 if (PrintMethodFlushing) { | |
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528 nm->print_on(tty, " ### nmethod is speculatively disconnected\n"); |
1202 | 529 } |
530 if (LogCompilation && (xtty != NULL)) { | |
531 ttyLocker ttyl; | |
532 xtty->begin_elem("nmethod_disconnected compile_id='%3d'", nm->compile_id()); | |
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533 xtty->method(nm->method()); |
1202 | 534 xtty->stamp(); |
535 xtty->end_elem(); | |
536 } | |
537 nm->method()->clear_code(); | |
538 nm->set_speculatively_disconnected(true); | |
539 } | |
540 | |
541 | |
0 | 542 void CodeCache::gc_prologue() { |
989 | 543 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_epilogue must be called"); |
0 | 544 } |
545 | |
546 | |
547 void CodeCache::gc_epilogue() { | |
548 assert_locked_or_safepoint(CodeCache_lock); | |
549 FOR_ALL_ALIVE_BLOBS(cb) { | |
550 if (cb->is_nmethod()) { | |
551 nmethod *nm = (nmethod*)cb; | |
552 assert(!nm->is_unloaded(), "Tautology"); | |
553 if (needs_cache_clean()) { | |
554 nm->cleanup_inline_caches(); | |
555 } | |
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556 DEBUG_ONLY(nm->verify()); |
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557 nm->fix_oop_relocations(); |
0 | 558 } |
559 } | |
560 set_needs_cache_clean(false); | |
989 | 561 prune_scavenge_root_nmethods(); |
562 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); | |
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563 |
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564 #ifdef ASSERT |
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565 // make sure that we aren't leaking icholders |
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566 int count = 0; |
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567 FOR_ALL_BLOBS(cb) { |
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568 if (cb->is_nmethod()) { |
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569 RelocIterator iter((nmethod*)cb); |
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570 while(iter.next()) { |
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571 if (iter.type() == relocInfo::virtual_call_type) { |
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572 if (CompiledIC::is_icholder_call_site(iter.virtual_call_reloc())) { |
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573 CompiledIC *ic = CompiledIC_at(iter.reloc()); |
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574 if (TraceCompiledIC) { |
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575 tty->print("noticed icholder " INTPTR_FORMAT " ", ic->cached_icholder()); |
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576 ic->print(); |
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577 } |
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578 assert(ic->cached_icholder() != NULL, "must be non-NULL"); |
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579 count++; |
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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 } |
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585 |
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586 assert(count + InlineCacheBuffer::pending_icholder_count() + CompiledICHolder::live_not_claimed_count() == |
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587 CompiledICHolder::live_count(), "must agree"); |
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588 #endif |
0 | 589 } |
590 | |
591 | |
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592 void CodeCache::verify_oops() { |
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593 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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594 VerifyOopClosure voc; |
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595 FOR_ALL_ALIVE_BLOBS(cb) { |
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596 if (cb->is_nmethod()) { |
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597 nmethod *nm = (nmethod*)cb; |
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598 nm->oops_do(&voc); |
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599 nm->verify_oop_relocations(); |
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600 } |
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601 } |
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602 } |
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603 |
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604 |
0 | 605 address CodeCache::first_address() { |
606 assert_locked_or_safepoint(CodeCache_lock); | |
607 return (address)_heap->begin(); | |
608 } | |
609 | |
610 | |
611 address CodeCache::last_address() { | |
612 assert_locked_or_safepoint(CodeCache_lock); | |
613 return (address)_heap->end(); | |
614 } | |
615 | |
616 | |
617 void icache_init(); | |
618 | |
619 void CodeCache::initialize() { | |
620 assert(CodeCacheSegmentSize >= (uintx)CodeEntryAlignment, "CodeCacheSegmentSize must be large enough to align entry points"); | |
621 #ifdef COMPILER2 | |
622 assert(CodeCacheSegmentSize >= (uintx)OptoLoopAlignment, "CodeCacheSegmentSize must be large enough to align inner loops"); | |
623 #endif | |
624 assert(CodeCacheSegmentSize >= sizeof(jdouble), "CodeCacheSegmentSize must be large enough to align constants"); | |
625 // This was originally just a check of the alignment, causing failure, instead, round | |
626 // the code cache to the page size. In particular, Solaris is moving to a larger | |
627 // default page size. | |
628 CodeCacheExpansionSize = round_to(CodeCacheExpansionSize, os::vm_page_size()); | |
629 InitialCodeCacheSize = round_to(InitialCodeCacheSize, os::vm_page_size()); | |
630 ReservedCodeCacheSize = round_to(ReservedCodeCacheSize, os::vm_page_size()); | |
631 if (!_heap->reserve(ReservedCodeCacheSize, InitialCodeCacheSize, CodeCacheSegmentSize)) { | |
632 vm_exit_during_initialization("Could not reserve enough space for code cache"); | |
633 } | |
634 | |
635 MemoryService::add_code_heap_memory_pool(_heap); | |
636 | |
637 // Initialize ICache flush mechanism | |
638 // This service is needed for os::register_code_area | |
639 icache_init(); | |
640 | |
641 // Give OS a chance to register generated code area. | |
642 // This is used on Windows 64 bit platforms to register | |
643 // Structured Exception Handlers for our generated code. | |
644 os::register_code_area(_heap->low_boundary(), _heap->high_boundary()); | |
645 } | |
646 | |
647 | |
648 void codeCache_init() { | |
649 CodeCache::initialize(); | |
650 } | |
651 | |
652 //------------------------------------------------------------------------------------------------ | |
653 | |
654 int CodeCache::number_of_nmethods_with_dependencies() { | |
655 return _number_of_nmethods_with_dependencies; | |
656 } | |
657 | |
658 void CodeCache::clear_inline_caches() { | |
659 assert_locked_or_safepoint(CodeCache_lock); | |
660 FOR_ALL_ALIVE_NMETHODS(nm) { | |
661 nm->clear_inline_caches(); | |
662 } | |
663 } | |
664 | |
665 #ifndef PRODUCT | |
666 // used to keep track of how much time is spent in mark_for_deoptimization | |
667 static elapsedTimer dependentCheckTime; | |
668 static int dependentCheckCount = 0; | |
669 #endif // PRODUCT | |
670 | |
671 | |
672 int CodeCache::mark_for_deoptimization(DepChange& changes) { | |
673 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
674 | |
675 #ifndef PRODUCT | |
676 dependentCheckTime.start(); | |
677 dependentCheckCount++; | |
678 #endif // PRODUCT | |
679 | |
680 int number_of_marked_CodeBlobs = 0; | |
681 | |
682 // search the hierarchy looking for nmethods which are affected by the loading of this class | |
683 | |
684 // then search the interfaces this class implements looking for nmethods | |
685 // which might be dependent of the fact that an interface only had one | |
686 // implementor. | |
687 | |
688 { No_Safepoint_Verifier nsv; | |
689 for (DepChange::ContextStream str(changes, nsv); str.next(); ) { | |
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690 Klass* d = str.klass(); |
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691 number_of_marked_CodeBlobs += InstanceKlass::cast(d)->mark_dependent_nmethods(changes); |
0 | 692 } |
693 } | |
694 | |
695 if (VerifyDependencies) { | |
696 // Turn off dependency tracing while actually testing deps. | |
697 NOT_PRODUCT( FlagSetting fs(TraceDependencies, false) ); | |
698 FOR_ALL_ALIVE_NMETHODS(nm) { | |
699 if (!nm->is_marked_for_deoptimization() && | |
700 nm->check_all_dependencies()) { | |
701 ResourceMark rm; | |
702 tty->print_cr("Should have been marked for deoptimization:"); | |
703 changes.print(); | |
704 nm->print(); | |
705 nm->print_dependencies(); | |
706 } | |
707 } | |
708 } | |
709 | |
710 #ifndef PRODUCT | |
711 dependentCheckTime.stop(); | |
712 #endif // PRODUCT | |
713 | |
714 return number_of_marked_CodeBlobs; | |
715 } | |
716 | |
717 | |
718 #ifdef HOTSWAP | |
719 int CodeCache::mark_for_evol_deoptimization(instanceKlassHandle dependee) { | |
720 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
721 int number_of_marked_CodeBlobs = 0; | |
722 | |
723 // Deoptimize all methods of the evolving class itself | |
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724 Array<Method*>* old_methods = dependee->methods(); |
0 | 725 for (int i = 0; i < old_methods->length(); i++) { |
726 ResourceMark rm; | |
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727 Method* old_method = old_methods->at(i); |
0 | 728 nmethod *nm = old_method->code(); |
729 if (nm != NULL) { | |
730 nm->mark_for_deoptimization(); | |
731 number_of_marked_CodeBlobs++; | |
732 } | |
733 } | |
734 | |
735 FOR_ALL_ALIVE_NMETHODS(nm) { | |
736 if (nm->is_marked_for_deoptimization()) { | |
737 // ...Already marked in the previous pass; don't count it again. | |
738 } else if (nm->is_evol_dependent_on(dependee())) { | |
739 ResourceMark rm; | |
740 nm->mark_for_deoptimization(); | |
741 number_of_marked_CodeBlobs++; | |
742 } else { | |
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743 // flush caches in case they refer to a redefined Method* |
0 | 744 nm->clear_inline_caches(); |
745 } | |
746 } | |
747 | |
748 return number_of_marked_CodeBlobs; | |
749 } | |
750 #endif // HOTSWAP | |
751 | |
752 | |
753 // Deoptimize all methods | |
754 void CodeCache::mark_all_nmethods_for_deoptimization() { | |
755 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
756 FOR_ALL_ALIVE_NMETHODS(nm) { | |
757 nm->mark_for_deoptimization(); | |
758 } | |
759 } | |
760 | |
761 | |
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762 int CodeCache::mark_for_deoptimization(Method* dependee) { |
0 | 763 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
764 int number_of_marked_CodeBlobs = 0; | |
765 | |
766 FOR_ALL_ALIVE_NMETHODS(nm) { | |
767 if (nm->is_dependent_on_method(dependee)) { | |
768 ResourceMark rm; | |
769 nm->mark_for_deoptimization(); | |
770 number_of_marked_CodeBlobs++; | |
771 } | |
772 } | |
773 | |
774 return number_of_marked_CodeBlobs; | |
775 } | |
776 | |
777 void CodeCache::make_marked_nmethods_zombies() { | |
778 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
779 FOR_ALL_ALIVE_NMETHODS(nm) { | |
780 if (nm->is_marked_for_deoptimization()) { | |
781 | |
782 // If the nmethod has already been made non-entrant and it can be converted | |
783 // then zombie it now. Otherwise make it non-entrant and it will eventually | |
784 // be zombied when it is no longer seen on the stack. Note that the nmethod | |
785 // might be "entrant" and not on the stack and so could be zombied immediately | |
786 // but we can't tell because we don't track it on stack until it becomes | |
787 // non-entrant. | |
788 | |
789 if (nm->is_not_entrant() && nm->can_not_entrant_be_converted()) { | |
790 nm->make_zombie(); | |
791 } else { | |
792 nm->make_not_entrant(); | |
793 } | |
794 } | |
795 } | |
796 } | |
797 | |
798 void CodeCache::make_marked_nmethods_not_entrant() { | |
799 assert_locked_or_safepoint(CodeCache_lock); | |
800 FOR_ALL_ALIVE_NMETHODS(nm) { | |
801 if (nm->is_marked_for_deoptimization()) { | |
802 nm->make_not_entrant(); | |
803 } | |
804 } | |
805 } | |
806 | |
807 void CodeCache::verify() { | |
808 _heap->verify(); | |
809 FOR_ALL_ALIVE_BLOBS(p) { | |
810 p->verify(); | |
811 } | |
812 } | |
813 | |
814 //------------------------------------------------------------------------------------------------ | |
815 // Non-product version | |
816 | |
817 #ifndef PRODUCT | |
818 | |
819 void CodeCache::verify_if_often() { | |
820 if (VerifyCodeCacheOften) { | |
821 _heap->verify(); | |
822 } | |
823 } | |
824 | |
989 | 825 void CodeCache::print_trace(const char* event, CodeBlob* cb, int size) { |
826 if (PrintCodeCache2) { // Need to add a new flag | |
827 ResourceMark rm; | |
828 if (size == 0) size = cb->size(); | |
829 tty->print_cr("CodeCache %s: addr: " INTPTR_FORMAT ", size: 0x%x", event, cb, size); | |
830 } | |
831 } | |
832 | |
0 | 833 void CodeCache::print_internals() { |
834 int nmethodCount = 0; | |
835 int runtimeStubCount = 0; | |
836 int adapterCount = 0; | |
837 int deoptimizationStubCount = 0; | |
838 int uncommonTrapStubCount = 0; | |
839 int bufferBlobCount = 0; | |
840 int total = 0; | |
841 int nmethodAlive = 0; | |
842 int nmethodNotEntrant = 0; | |
843 int nmethodZombie = 0; | |
844 int nmethodUnloaded = 0; | |
845 int nmethodJava = 0; | |
846 int nmethodNative = 0; | |
847 int maxCodeSize = 0; | |
848 ResourceMark rm; | |
849 | |
850 CodeBlob *cb; | |
851 for (cb = first(); cb != NULL; cb = next(cb)) { | |
852 total++; | |
853 if (cb->is_nmethod()) { | |
854 nmethod* nm = (nmethod*)cb; | |
855 | |
856 if (Verbose && nm->method() != NULL) { | |
857 ResourceMark rm; | |
858 char *method_name = nm->method()->name_and_sig_as_C_string(); | |
859 tty->print("%s", method_name); | |
860 if(nm->is_alive()) { tty->print_cr(" alive"); } | |
861 if(nm->is_not_entrant()) { tty->print_cr(" not-entrant"); } | |
862 if(nm->is_zombie()) { tty->print_cr(" zombie"); } | |
863 } | |
864 | |
865 nmethodCount++; | |
866 | |
867 if(nm->is_alive()) { nmethodAlive++; } | |
868 if(nm->is_not_entrant()) { nmethodNotEntrant++; } | |
869 if(nm->is_zombie()) { nmethodZombie++; } | |
870 if(nm->is_unloaded()) { nmethodUnloaded++; } | |
871 if(nm->is_native_method()) { nmethodNative++; } | |
872 | |
873 if(nm->method() != NULL && nm->is_java_method()) { | |
874 nmethodJava++; | |
1748 | 875 if (nm->insts_size() > maxCodeSize) { |
876 maxCodeSize = nm->insts_size(); | |
0 | 877 } |
878 } | |
879 } else if (cb->is_runtime_stub()) { | |
880 runtimeStubCount++; | |
881 } else if (cb->is_deoptimization_stub()) { | |
882 deoptimizationStubCount++; | |
883 } else if (cb->is_uncommon_trap_stub()) { | |
884 uncommonTrapStubCount++; | |
885 } else if (cb->is_adapter_blob()) { | |
886 adapterCount++; | |
887 } else if (cb->is_buffer_blob()) { | |
888 bufferBlobCount++; | |
889 } | |
890 } | |
891 | |
892 int bucketSize = 512; | |
893 int bucketLimit = maxCodeSize / bucketSize + 1; | |
6197 | 894 int *buckets = NEW_C_HEAP_ARRAY(int, bucketLimit, mtCode); |
0 | 895 memset(buckets,0,sizeof(int) * bucketLimit); |
896 | |
897 for (cb = first(); cb != NULL; cb = next(cb)) { | |
898 if (cb->is_nmethod()) { | |
899 nmethod* nm = (nmethod*)cb; | |
900 if(nm->is_java_method()) { | |
1748 | 901 buckets[nm->insts_size() / bucketSize]++; |
0 | 902 } |
903 } | |
904 } | |
905 tty->print_cr("Code Cache Entries (total of %d)",total); | |
906 tty->print_cr("-------------------------------------------------"); | |
907 tty->print_cr("nmethods: %d",nmethodCount); | |
908 tty->print_cr("\talive: %d",nmethodAlive); | |
909 tty->print_cr("\tnot_entrant: %d",nmethodNotEntrant); | |
910 tty->print_cr("\tzombie: %d",nmethodZombie); | |
911 tty->print_cr("\tunloaded: %d",nmethodUnloaded); | |
912 tty->print_cr("\tjava: %d",nmethodJava); | |
913 tty->print_cr("\tnative: %d",nmethodNative); | |
914 tty->print_cr("runtime_stubs: %d",runtimeStubCount); | |
915 tty->print_cr("adapters: %d",adapterCount); | |
916 tty->print_cr("buffer blobs: %d",bufferBlobCount); | |
917 tty->print_cr("deoptimization_stubs: %d",deoptimizationStubCount); | |
918 tty->print_cr("uncommon_traps: %d",uncommonTrapStubCount); | |
919 tty->print_cr("\nnmethod size distribution (non-zombie java)"); | |
920 tty->print_cr("-------------------------------------------------"); | |
921 | |
922 for(int i=0; i<bucketLimit; i++) { | |
923 if(buckets[i] != 0) { | |
924 tty->print("%d - %d bytes",i*bucketSize,(i+1)*bucketSize); | |
925 tty->fill_to(40); | |
926 tty->print_cr("%d",buckets[i]); | |
927 } | |
928 } | |
929 | |
6197 | 930 FREE_C_HEAP_ARRAY(int, buckets, mtCode); |
0 | 931 } |
932 | |
933 void CodeCache::print() { | |
934 CodeBlob_sizes live; | |
935 CodeBlob_sizes dead; | |
936 | |
937 FOR_ALL_BLOBS(p) { | |
938 if (!p->is_alive()) { | |
939 dead.add(p); | |
940 } else { | |
941 live.add(p); | |
942 } | |
943 } | |
944 | |
945 tty->print_cr("CodeCache:"); | |
946 | |
947 tty->print_cr("nmethod dependency checking time %f", dependentCheckTime.seconds(), | |
948 dependentCheckTime.seconds() / dependentCheckCount); | |
949 | |
950 if (!live.is_empty()) { | |
951 live.print("live"); | |
952 } | |
953 if (!dead.is_empty()) { | |
954 dead.print("dead"); | |
955 } | |
956 | |
957 | |
958 if (Verbose) { | |
959 // print the oop_map usage | |
960 int code_size = 0; | |
961 int number_of_blobs = 0; | |
962 int number_of_oop_maps = 0; | |
963 int map_size = 0; | |
964 FOR_ALL_BLOBS(p) { | |
965 if (p->is_alive()) { | |
966 number_of_blobs++; | |
1748 | 967 code_size += p->code_size(); |
0 | 968 OopMapSet* set = p->oop_maps(); |
969 if (set != NULL) { | |
970 number_of_oop_maps += set->size(); | |
1748 | 971 map_size += set->heap_size(); |
0 | 972 } |
973 } | |
974 } | |
975 tty->print_cr("OopMaps"); | |
976 tty->print_cr(" #blobs = %d", number_of_blobs); | |
977 tty->print_cr(" code size = %d", code_size); | |
978 tty->print_cr(" #oop_maps = %d", number_of_oop_maps); | |
979 tty->print_cr(" map size = %d", map_size); | |
980 } | |
981 | |
982 } | |
983 | |
984 #endif // PRODUCT | |
1907 | 985 |
986 void CodeCache::print_bounds(outputStream* st) { | |
987 st->print_cr("Code Cache [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", | |
988 _heap->low_boundary(), | |
989 _heap->high(), | |
990 _heap->high_boundary()); | |
991 st->print_cr(" total_blobs=" UINT32_FORMAT " nmethods=" UINT32_FORMAT | |
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992 " adapters=" UINT32_FORMAT " free_code_cache=" SIZE_FORMAT "Kb" |
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993 " largest_free_block=" SIZE_FORMAT, |
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994 nof_blobs(), nof_nmethods(), nof_adapters(), |
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995 unallocated_capacity()/K, largest_free_block()); |
1907 | 996 } |
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997 |
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998 void CodeCache::log_state(outputStream* st) { |
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999 st->print(" total_blobs='" UINT32_FORMAT "' nmethods='" UINT32_FORMAT "'" |
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1000 " adapters='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'" |
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1001 " largest_free_block='" SIZE_FORMAT "'", |
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1002 nof_blobs(), nof_nmethods(), nof_adapters(), |
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1003 unallocated_capacity(), largest_free_block()); |
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1004 } |
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1005 |
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1006 size_t CodeCache::largest_free_block() { |
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1007 // This is called both with and without CodeCache_lock held so |
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1008 // handle both cases. |
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1009 if (CodeCache_lock->owned_by_self()) { |
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1010 return _heap->largest_free_block(); |
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1011 } else { |
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1012 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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1013 return _heap->largest_free_block(); |
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1014 } |
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1015 } |