Mercurial > hg > truffle
annotate src/share/vm/code/codeCache.cpp @ 14714:b602356a9cfc
additional canonicalizers for accesses and value nodes (improves number of implicit null checks)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Thu, 20 Mar 2014 17:15:36 +0100 |
parents | b51e29501f30 |
children | 92aa6797d639 |
rev | line source |
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0 | 1 /* |
10405 | 2 * Copyright (c) 1997, 2013, 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" | |
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33 #include "compiler/compileBroker.hpp" |
1972 | 34 #include "gc_implementation/shared/markSweep.hpp" |
35 #include "memory/allocation.inline.hpp" | |
36 #include "memory/gcLocker.hpp" | |
37 #include "memory/iterator.hpp" | |
38 #include "memory/resourceArea.hpp" | |
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39 #include "oops/method.hpp" |
1972 | 40 #include "oops/objArrayOop.hpp" |
41 #include "oops/oop.inline.hpp" | |
42 #include "runtime/handles.inline.hpp" | |
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43 #include "runtime/arguments.hpp" |
1972 | 44 #include "runtime/icache.hpp" |
45 #include "runtime/java.hpp" | |
46 #include "runtime/mutexLocker.hpp" | |
47 #include "services/memoryService.hpp" | |
10405 | 48 #include "trace/tracing.hpp" |
1972 | 49 #include "utilities/xmlstream.hpp" |
0 | 50 |
51 // Helper class for printing in CodeCache | |
52 | |
53 class CodeBlob_sizes { | |
54 private: | |
55 int count; | |
56 int total_size; | |
57 int header_size; | |
58 int code_size; | |
59 int stub_size; | |
60 int relocation_size; | |
61 int scopes_oop_size; | |
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62 int scopes_metadata_size; |
0 | 63 int scopes_data_size; |
64 int scopes_pcs_size; | |
65 | |
66 public: | |
67 CodeBlob_sizes() { | |
68 count = 0; | |
69 total_size = 0; | |
70 header_size = 0; | |
71 code_size = 0; | |
72 stub_size = 0; | |
73 relocation_size = 0; | |
74 scopes_oop_size = 0; | |
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75 scopes_metadata_size = 0; |
0 | 76 scopes_data_size = 0; |
77 scopes_pcs_size = 0; | |
78 } | |
79 | |
80 int total() { return total_size; } | |
81 bool is_empty() { return count == 0; } | |
82 | |
83 void print(const char* title) { | |
84 tty->print_cr(" #%d %s = %dK (hdr %d%%, loc %d%%, code %d%%, stub %d%%, [oops %d%%, data %d%%, pcs %d%%])", | |
85 count, | |
86 title, | |
87 total() / K, | |
88 header_size * 100 / total_size, | |
89 relocation_size * 100 / total_size, | |
90 code_size * 100 / total_size, | |
91 stub_size * 100 / total_size, | |
92 scopes_oop_size * 100 / total_size, | |
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93 scopes_metadata_size * 100 / total_size, |
0 | 94 scopes_data_size * 100 / total_size, |
95 scopes_pcs_size * 100 / total_size); | |
96 } | |
97 | |
98 void add(CodeBlob* cb) { | |
99 count++; | |
100 total_size += cb->size(); | |
101 header_size += cb->header_size(); | |
102 relocation_size += cb->relocation_size(); | |
103 if (cb->is_nmethod()) { | |
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104 nmethod* nm = cb->as_nmethod_or_null(); |
1748 | 105 code_size += nm->insts_size(); |
0 | 106 stub_size += nm->stub_size(); |
107 | |
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108 scopes_oop_size += nm->oops_size(); |
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109 scopes_metadata_size += nm->metadata_size(); |
0 | 110 scopes_data_size += nm->scopes_data_size(); |
111 scopes_pcs_size += nm->scopes_pcs_size(); | |
112 } else { | |
1748 | 113 code_size += cb->code_size(); |
0 | 114 } |
115 } | |
116 }; | |
117 | |
118 // CodeCache implementation | |
119 | |
120 CodeHeap * CodeCache::_heap = new CodeHeap(); | |
121 int CodeCache::_number_of_blobs = 0; | |
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122 int CodeCache::_number_of_adapters = 0; |
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123 int CodeCache::_number_of_nmethods = 0; |
0 | 124 int CodeCache::_number_of_nmethods_with_dependencies = 0; |
125 bool CodeCache::_needs_cache_clean = false; | |
989 | 126 nmethod* CodeCache::_scavenge_root_nmethods = NULL; |
0 | 127 |
10405 | 128 int CodeCache::_codemem_full_count = 0; |
0 | 129 |
130 CodeBlob* CodeCache::first() { | |
131 assert_locked_or_safepoint(CodeCache_lock); | |
132 return (CodeBlob*)_heap->first(); | |
133 } | |
134 | |
135 | |
136 CodeBlob* CodeCache::next(CodeBlob* cb) { | |
137 assert_locked_or_safepoint(CodeCache_lock); | |
138 return (CodeBlob*)_heap->next(cb); | |
139 } | |
140 | |
141 | |
142 CodeBlob* CodeCache::alive(CodeBlob *cb) { | |
143 assert_locked_or_safepoint(CodeCache_lock); | |
144 while (cb != NULL && !cb->is_alive()) cb = next(cb); | |
145 return cb; | |
146 } | |
147 | |
148 | |
149 nmethod* CodeCache::alive_nmethod(CodeBlob* cb) { | |
150 assert_locked_or_safepoint(CodeCache_lock); | |
151 while (cb != NULL && (!cb->is_alive() || !cb->is_nmethod())) cb = next(cb); | |
152 return (nmethod*)cb; | |
153 } | |
154 | |
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155 nmethod* CodeCache::first_nmethod() { |
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156 assert_locked_or_safepoint(CodeCache_lock); |
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157 CodeBlob* cb = first(); |
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158 while (cb != NULL && !cb->is_nmethod()) { |
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159 cb = next(cb); |
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160 } |
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161 return (nmethod*)cb; |
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162 } |
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163 |
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164 nmethod* CodeCache::next_nmethod (CodeBlob* cb) { |
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165 assert_locked_or_safepoint(CodeCache_lock); |
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166 cb = next(cb); |
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167 while (cb != NULL && !cb->is_nmethod()) { |
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168 cb = next(cb); |
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169 } |
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170 return (nmethod*)cb; |
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171 } |
0 | 172 |
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173 static size_t maxCodeCacheUsed = 0; |
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174 |
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175 CodeBlob* CodeCache::allocate(int size, bool is_critical) { |
0 | 176 // Do not seize the CodeCache lock here--if the caller has not |
177 // already done so, we are going to lose bigtime, since the code | |
178 // cache will contain a garbage CodeBlob until the caller can | |
179 // run the constructor for the CodeBlob subclass he is busy | |
180 // instantiating. | |
181 guarantee(size >= 0, "allocation request must be reasonable"); | |
182 assert_locked_or_safepoint(CodeCache_lock); | |
183 CodeBlob* cb = NULL; | |
184 _number_of_blobs++; | |
185 while (true) { | |
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186 cb = (CodeBlob*)_heap->allocate(size, is_critical); |
0 | 187 if (cb != NULL) break; |
188 if (!_heap->expand_by(CodeCacheExpansionSize)) { | |
189 // Expansion failed | |
190 return NULL; | |
191 } | |
192 if (PrintCodeCacheExtension) { | |
193 ResourceMark rm; | |
194 tty->print_cr("code cache extended to [" INTPTR_FORMAT ", " INTPTR_FORMAT "] (%d bytes)", | |
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195 (intptr_t)_heap->low_boundary(), (intptr_t)_heap->high(), |
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196 (address)_heap->high() - (address)_heap->low_boundary()); |
0 | 197 } |
198 } | |
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199 maxCodeCacheUsed = MAX2(maxCodeCacheUsed, ((address)_heap->high_boundary() - |
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200 (address)_heap->low_boundary()) - unallocated_capacity()); |
989 | 201 print_trace("allocation", cb, size); |
0 | 202 return cb; |
203 } | |
204 | |
205 void CodeCache::free(CodeBlob* cb) { | |
206 assert_locked_or_safepoint(CodeCache_lock); | |
207 | |
989 | 208 print_trace("free", cb); |
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209 if (cb->is_nmethod()) { |
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210 _number_of_nmethods--; |
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211 if (((nmethod *)cb)->has_dependencies()) { |
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212 _number_of_nmethods_with_dependencies--; |
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213 } |
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214 } |
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215 if (cb->is_adapter_blob()) { |
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216 _number_of_adapters--; |
0 | 217 } |
218 _number_of_blobs--; | |
219 | |
220 _heap->deallocate(cb); | |
221 | |
222 assert(_number_of_blobs >= 0, "sanity check"); | |
223 } | |
224 | |
225 | |
226 void CodeCache::commit(CodeBlob* cb) { | |
227 // this is called by nmethod::nmethod, which must already own CodeCache_lock | |
228 assert_locked_or_safepoint(CodeCache_lock); | |
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229 if (cb->is_nmethod()) { |
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230 _number_of_nmethods++; |
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231 if (((nmethod *)cb)->has_dependencies()) { |
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232 _number_of_nmethods_with_dependencies++; |
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233 } |
0 | 234 } |
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235 if (cb->is_adapter_blob()) { |
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236 _number_of_adapters++; |
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237 } |
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238 |
0 | 239 // flush the hardware I-cache |
1748 | 240 ICache::invalidate_range(cb->content_begin(), cb->content_size()); |
0 | 241 } |
242 | |
243 | |
244 // Iteration over CodeBlobs | |
245 | |
246 #define FOR_ALL_BLOBS(var) for (CodeBlob *var = first() ; var != NULL; var = next(var) ) | |
247 #define FOR_ALL_ALIVE_BLOBS(var) for (CodeBlob *var = alive(first()); var != NULL; var = alive(next(var))) | |
248 #define FOR_ALL_ALIVE_NMETHODS(var) for (nmethod *var = alive_nmethod(first()); var != NULL; var = alive_nmethod(next(var))) | |
249 | |
250 | |
251 bool CodeCache::contains(void *p) { | |
252 // It should be ok to call contains without holding a lock | |
253 return _heap->contains(p); | |
254 } | |
255 | |
256 | |
257 // This method is safe to call without holding the CodeCache_lock, as long as a dead codeblob is not | |
258 // looked up (i.e., one that has been marked for deletion). It only dependes on the _segmap to contain | |
259 // valid indices, which it will always do, as long as the CodeBlob is not in the process of being recycled. | |
260 CodeBlob* CodeCache::find_blob(void* start) { | |
261 CodeBlob* result = find_blob_unsafe(start); | |
262 if (result == NULL) return NULL; | |
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263 // We could potentially look up non_entrant methods |
0 | 264 guarantee(!result->is_zombie() || result->is_locked_by_vm() || is_error_reported(), "unsafe access to zombie method"); |
265 return result; | |
266 } | |
267 | |
268 nmethod* CodeCache::find_nmethod(void* start) { | |
269 CodeBlob *cb = find_blob(start); | |
270 assert(cb == NULL || cb->is_nmethod(), "did not find an nmethod"); | |
271 return (nmethod*)cb; | |
272 } | |
273 | |
274 | |
275 void CodeCache::blobs_do(void f(CodeBlob* nm)) { | |
276 assert_locked_or_safepoint(CodeCache_lock); | |
277 FOR_ALL_BLOBS(p) { | |
278 f(p); | |
279 } | |
280 } | |
281 | |
282 | |
283 void CodeCache::nmethods_do(void f(nmethod* nm)) { | |
284 assert_locked_or_safepoint(CodeCache_lock); | |
285 FOR_ALL_BLOBS(nm) { | |
286 if (nm->is_nmethod()) f((nmethod*)nm); | |
287 } | |
288 } | |
289 | |
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290 void CodeCache::alive_nmethods_do(void f(nmethod* nm)) { |
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291 assert_locked_or_safepoint(CodeCache_lock); |
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292 FOR_ALL_ALIVE_NMETHODS(nm) { |
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293 f(nm); |
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294 } |
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295 } |
0 | 296 |
297 int CodeCache::alignment_unit() { | |
298 return (int)_heap->alignment_unit(); | |
299 } | |
300 | |
301 | |
302 int CodeCache::alignment_offset() { | |
303 return (int)_heap->alignment_offset(); | |
304 } | |
305 | |
306 | |
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307 // Mark nmethods for unloading if they contain otherwise unreachable |
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308 // oops. |
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309 void CodeCache::do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred) { |
0 | 310 assert_locked_or_safepoint(CodeCache_lock); |
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311 FOR_ALL_ALIVE_NMETHODS(nm) { |
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312 nm->do_unloading(is_alive, unloading_occurred); |
0 | 313 } |
314 } | |
315 | |
989 | 316 void CodeCache::blobs_do(CodeBlobClosure* f) { |
0 | 317 assert_locked_or_safepoint(CodeCache_lock); |
318 FOR_ALL_ALIVE_BLOBS(cb) { | |
989 | 319 f->do_code_blob(cb); |
320 | |
321 #ifdef ASSERT | |
322 if (cb->is_nmethod()) | |
323 ((nmethod*)cb)->verify_scavenge_root_oops(); | |
324 #endif //ASSERT | |
0 | 325 } |
326 } | |
327 | |
989 | 328 // Walk the list of methods which might contain non-perm oops. |
329 void CodeCache::scavenge_root_nmethods_do(CodeBlobClosure* f) { | |
330 assert_locked_or_safepoint(CodeCache_lock); | |
331 debug_only(mark_scavenge_root_nmethods()); | |
332 | |
333 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
334 debug_only(cur->clear_scavenge_root_marked()); | |
335 assert(cur->scavenge_root_not_marked(), ""); | |
336 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
337 | |
338 bool is_live = (!cur->is_zombie() && !cur->is_unloaded()); | |
339 #ifndef PRODUCT | |
340 if (TraceScavenge) { | |
341 cur->print_on(tty, is_live ? "scavenge root" : "dead scavenge root"); tty->cr(); | |
342 } | |
343 #endif //PRODUCT | |
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344 if (is_live) { |
989 | 345 // Perform cur->oops_do(f), maybe just once per nmethod. |
346 f->do_code_blob(cur); | |
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347 } |
989 | 348 } |
349 | |
350 // Check for stray marks. | |
351 debug_only(verify_perm_nmethods(NULL)); | |
352 } | |
353 | |
354 void CodeCache::add_scavenge_root_nmethod(nmethod* nm) { | |
355 assert_locked_or_safepoint(CodeCache_lock); | |
356 nm->set_on_scavenge_root_list(); | |
357 nm->set_scavenge_root_link(_scavenge_root_nmethods); | |
358 set_scavenge_root_nmethods(nm); | |
359 print_trace("add_scavenge_root", nm); | |
360 } | |
361 | |
362 void CodeCache::drop_scavenge_root_nmethod(nmethod* nm) { | |
363 assert_locked_or_safepoint(CodeCache_lock); | |
364 print_trace("drop_scavenge_root", nm); | |
365 nmethod* last = NULL; | |
366 nmethod* cur = scavenge_root_nmethods(); | |
367 while (cur != NULL) { | |
368 nmethod* next = cur->scavenge_root_link(); | |
369 if (cur == nm) { | |
370 if (last != NULL) | |
371 last->set_scavenge_root_link(next); | |
372 else set_scavenge_root_nmethods(next); | |
373 nm->set_scavenge_root_link(NULL); | |
374 nm->clear_on_scavenge_root_list(); | |
375 return; | |
376 } | |
377 last = cur; | |
378 cur = next; | |
379 } | |
380 assert(false, "should have been on list"); | |
381 } | |
382 | |
383 void CodeCache::prune_scavenge_root_nmethods() { | |
384 assert_locked_or_safepoint(CodeCache_lock); | |
385 debug_only(mark_scavenge_root_nmethods()); | |
386 | |
387 nmethod* last = NULL; | |
388 nmethod* cur = scavenge_root_nmethods(); | |
389 while (cur != NULL) { | |
390 nmethod* next = cur->scavenge_root_link(); | |
391 debug_only(cur->clear_scavenge_root_marked()); | |
392 assert(cur->scavenge_root_not_marked(), ""); | |
393 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
394 | |
395 if (!cur->is_zombie() && !cur->is_unloaded() | |
396 && cur->detect_scavenge_root_oops()) { | |
397 // Keep it. Advance 'last' to prevent deletion. | |
398 last = cur; | |
399 } else { | |
400 // Prune it from the list, so we don't have to look at it any more. | |
401 print_trace("prune_scavenge_root", cur); | |
402 cur->set_scavenge_root_link(NULL); | |
403 cur->clear_on_scavenge_root_list(); | |
404 if (last != NULL) | |
405 last->set_scavenge_root_link(next); | |
406 else set_scavenge_root_nmethods(next); | |
407 } | |
408 cur = next; | |
409 } | |
410 | |
411 // Check for stray marks. | |
412 debug_only(verify_perm_nmethods(NULL)); | |
413 } | |
414 | |
415 #ifndef PRODUCT | |
416 void CodeCache::asserted_non_scavengable_nmethods_do(CodeBlobClosure* f) { | |
417 // While we are here, verify the integrity of the list. | |
418 mark_scavenge_root_nmethods(); | |
419 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
420 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
421 cur->clear_scavenge_root_marked(); | |
422 } | |
423 verify_perm_nmethods(f); | |
424 } | |
425 | |
426 // Temporarily mark nmethods that are claimed to be on the non-perm list. | |
427 void CodeCache::mark_scavenge_root_nmethods() { | |
428 FOR_ALL_ALIVE_BLOBS(cb) { | |
429 if (cb->is_nmethod()) { | |
430 nmethod *nm = (nmethod*)cb; | |
431 assert(nm->scavenge_root_not_marked(), "clean state"); | |
432 if (nm->on_scavenge_root_list()) | |
433 nm->set_scavenge_root_marked(); | |
434 } | |
435 } | |
436 } | |
437 | |
438 // If the closure is given, run it on the unlisted nmethods. | |
439 // Also make sure that the effects of mark_scavenge_root_nmethods is gone. | |
440 void CodeCache::verify_perm_nmethods(CodeBlobClosure* f_or_null) { | |
441 FOR_ALL_ALIVE_BLOBS(cb) { | |
442 bool call_f = (f_or_null != NULL); | |
443 if (cb->is_nmethod()) { | |
444 nmethod *nm = (nmethod*)cb; | |
445 assert(nm->scavenge_root_not_marked(), "must be already processed"); | |
446 if (nm->on_scavenge_root_list()) | |
447 call_f = false; // don't show this one to the client | |
448 nm->verify_scavenge_root_oops(); | |
449 } else { | |
450 call_f = false; // not an nmethod | |
451 } | |
452 if (call_f) f_or_null->do_code_blob(cb); | |
453 } | |
454 } | |
455 #endif //PRODUCT | |
456 | |
1202 | 457 |
0 | 458 void CodeCache::gc_prologue() { |
989 | 459 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_epilogue must be called"); |
0 | 460 } |
461 | |
462 void CodeCache::gc_epilogue() { | |
463 assert_locked_or_safepoint(CodeCache_lock); | |
464 FOR_ALL_ALIVE_BLOBS(cb) { | |
465 if (cb->is_nmethod()) { | |
466 nmethod *nm = (nmethod*)cb; | |
467 assert(!nm->is_unloaded(), "Tautology"); | |
468 if (needs_cache_clean()) { | |
469 nm->cleanup_inline_caches(); | |
470 } | |
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471 DEBUG_ONLY(nm->verify()); |
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472 nm->fix_oop_relocations(); |
0 | 473 } |
474 } | |
475 set_needs_cache_clean(false); | |
989 | 476 prune_scavenge_root_nmethods(); |
477 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); | |
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478 |
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479 #ifdef ASSERT |
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480 // make sure that we aren't leaking icholders |
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481 int count = 0; |
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482 FOR_ALL_BLOBS(cb) { |
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483 if (cb->is_nmethod()) { |
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484 RelocIterator iter((nmethod*)cb); |
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485 while(iter.next()) { |
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486 if (iter.type() == relocInfo::virtual_call_type) { |
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487 if (CompiledIC::is_icholder_call_site(iter.virtual_call_reloc())) { |
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488 CompiledIC *ic = CompiledIC_at(iter.reloc()); |
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489 if (TraceCompiledIC) { |
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490 tty->print("noticed icholder " INTPTR_FORMAT " ", ic->cached_icholder()); |
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491 ic->print(); |
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492 } |
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493 assert(ic->cached_icholder() != NULL, "must be non-NULL"); |
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494 count++; |
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495 } |
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496 } |
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497 } |
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498 } |
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499 } |
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500 |
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501 assert(count + InlineCacheBuffer::pending_icholder_count() + CompiledICHolder::live_not_claimed_count() == |
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502 CompiledICHolder::live_count(), "must agree"); |
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503 #endif |
0 | 504 } |
505 | |
506 | |
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507 void CodeCache::verify_oops() { |
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508 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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509 VerifyOopClosure voc; |
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510 FOR_ALL_ALIVE_BLOBS(cb) { |
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511 if (cb->is_nmethod()) { |
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512 nmethod *nm = (nmethod*)cb; |
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513 nm->oops_do(&voc); |
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514 nm->verify_oop_relocations(); |
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515 } |
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516 } |
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517 } |
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518 |
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519 |
0 | 520 address CodeCache::first_address() { |
521 assert_locked_or_safepoint(CodeCache_lock); | |
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522 return (address)_heap->low_boundary(); |
0 | 523 } |
524 | |
525 | |
526 address CodeCache::last_address() { | |
527 assert_locked_or_safepoint(CodeCache_lock); | |
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528 return (address)_heap->high(); |
0 | 529 } |
530 | |
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531 /** |
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532 * Returns the reverse free ratio. E.g., if 25% (1/4) of the code cache |
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533 * is free, reverse_free_ratio() returns 4. |
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534 */ |
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535 double CodeCache::reverse_free_ratio() { |
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536 double unallocated_capacity = (double)(CodeCache::unallocated_capacity() - CodeCacheMinimumFreeSpace); |
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537 double max_capacity = (double)CodeCache::max_capacity(); |
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538 return max_capacity / unallocated_capacity; |
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539 } |
0 | 540 |
541 void icache_init(); | |
542 | |
543 void CodeCache::initialize() { | |
544 assert(CodeCacheSegmentSize >= (uintx)CodeEntryAlignment, "CodeCacheSegmentSize must be large enough to align entry points"); | |
545 #ifdef COMPILER2 | |
546 assert(CodeCacheSegmentSize >= (uintx)OptoLoopAlignment, "CodeCacheSegmentSize must be large enough to align inner loops"); | |
547 #endif | |
548 assert(CodeCacheSegmentSize >= sizeof(jdouble), "CodeCacheSegmentSize must be large enough to align constants"); | |
549 // This was originally just a check of the alignment, causing failure, instead, round | |
550 // the code cache to the page size. In particular, Solaris is moving to a larger | |
551 // default page size. | |
552 CodeCacheExpansionSize = round_to(CodeCacheExpansionSize, os::vm_page_size()); | |
553 InitialCodeCacheSize = round_to(InitialCodeCacheSize, os::vm_page_size()); | |
554 ReservedCodeCacheSize = round_to(ReservedCodeCacheSize, os::vm_page_size()); | |
555 if (!_heap->reserve(ReservedCodeCacheSize, InitialCodeCacheSize, CodeCacheSegmentSize)) { | |
556 vm_exit_during_initialization("Could not reserve enough space for code cache"); | |
557 } | |
558 | |
559 MemoryService::add_code_heap_memory_pool(_heap); | |
560 | |
561 // Initialize ICache flush mechanism | |
562 // This service is needed for os::register_code_area | |
563 icache_init(); | |
564 | |
565 // Give OS a chance to register generated code area. | |
566 // This is used on Windows 64 bit platforms to register | |
567 // Structured Exception Handlers for our generated code. | |
568 os::register_code_area(_heap->low_boundary(), _heap->high_boundary()); | |
569 } | |
570 | |
571 | |
572 void codeCache_init() { | |
573 CodeCache::initialize(); | |
574 } | |
575 | |
576 //------------------------------------------------------------------------------------------------ | |
577 | |
578 int CodeCache::number_of_nmethods_with_dependencies() { | |
579 return _number_of_nmethods_with_dependencies; | |
580 } | |
581 | |
582 void CodeCache::clear_inline_caches() { | |
583 assert_locked_or_safepoint(CodeCache_lock); | |
584 FOR_ALL_ALIVE_NMETHODS(nm) { | |
585 nm->clear_inline_caches(); | |
586 } | |
587 } | |
588 | |
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589 // Keeps track of time spent for checking dependencies |
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590 NOT_PRODUCT(static elapsedTimer dependentCheckTime;) |
0 | 591 |
592 int CodeCache::mark_for_deoptimization(DepChange& changes) { | |
593 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
594 int number_of_marked_CodeBlobs = 0; | |
595 | |
596 // search the hierarchy looking for nmethods which are affected by the loading of this class | |
597 | |
598 // then search the interfaces this class implements looking for nmethods | |
599 // which might be dependent of the fact that an interface only had one | |
600 // implementor. | |
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601 // nmethod::check_all_dependencies works only correctly, if no safepoint |
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602 // can happen |
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603 No_Safepoint_Verifier nsv; |
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604 for (DepChange::ContextStream str(changes, nsv); str.next(); ) { |
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605 Klass* d = str.klass(); |
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606 number_of_marked_CodeBlobs += InstanceKlass::cast(d)->mark_dependent_nmethods(changes); |
0 | 607 } |
608 | |
609 #ifndef PRODUCT | |
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610 if (VerifyDependencies) { |
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611 // Object pointers are used as unique identifiers for dependency arguments. This |
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612 // is only possible if no safepoint, i.e., GC occurs during the verification code. |
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613 dependentCheckTime.start(); |
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614 nmethod::check_all_dependencies(changes); |
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615 dependentCheckTime.stop(); |
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616 } |
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617 #endif |
0 | 618 |
619 return number_of_marked_CodeBlobs; | |
620 } | |
621 | |
622 | |
623 #ifdef HOTSWAP | |
624 int CodeCache::mark_for_evol_deoptimization(instanceKlassHandle dependee) { | |
625 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
626 int number_of_marked_CodeBlobs = 0; | |
627 | |
628 // Deoptimize all methods of the evolving class itself | |
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629 Array<Method*>* old_methods = dependee->methods(); |
0 | 630 for (int i = 0; i < old_methods->length(); i++) { |
631 ResourceMark rm; | |
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632 Method* old_method = old_methods->at(i); |
0 | 633 nmethod *nm = old_method->code(); |
634 if (nm != NULL) { | |
635 nm->mark_for_deoptimization(); | |
636 number_of_marked_CodeBlobs++; | |
637 } | |
638 } | |
639 | |
640 FOR_ALL_ALIVE_NMETHODS(nm) { | |
641 if (nm->is_marked_for_deoptimization()) { | |
642 // ...Already marked in the previous pass; don't count it again. | |
643 } else if (nm->is_evol_dependent_on(dependee())) { | |
644 ResourceMark rm; | |
645 nm->mark_for_deoptimization(); | |
646 number_of_marked_CodeBlobs++; | |
647 } else { | |
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648 // flush caches in case they refer to a redefined Method* |
0 | 649 nm->clear_inline_caches(); |
650 } | |
651 } | |
652 | |
653 return number_of_marked_CodeBlobs; | |
654 } | |
655 #endif // HOTSWAP | |
656 | |
657 | |
658 // Deoptimize all methods | |
659 void CodeCache::mark_all_nmethods_for_deoptimization() { | |
660 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
661 FOR_ALL_ALIVE_NMETHODS(nm) { | |
662 nm->mark_for_deoptimization(); | |
663 } | |
664 } | |
665 | |
666 | |
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667 int CodeCache::mark_for_deoptimization(Method* dependee) { |
0 | 668 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
669 int number_of_marked_CodeBlobs = 0; | |
670 | |
671 FOR_ALL_ALIVE_NMETHODS(nm) { | |
672 if (nm->is_dependent_on_method(dependee)) { | |
673 ResourceMark rm; | |
674 nm->mark_for_deoptimization(); | |
675 number_of_marked_CodeBlobs++; | |
676 } | |
677 } | |
678 | |
679 return number_of_marked_CodeBlobs; | |
680 } | |
681 | |
682 void CodeCache::make_marked_nmethods_zombies() { | |
683 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
684 FOR_ALL_ALIVE_NMETHODS(nm) { | |
685 if (nm->is_marked_for_deoptimization()) { | |
686 | |
687 // If the nmethod has already been made non-entrant and it can be converted | |
688 // then zombie it now. Otherwise make it non-entrant and it will eventually | |
689 // be zombied when it is no longer seen on the stack. Note that the nmethod | |
690 // might be "entrant" and not on the stack and so could be zombied immediately | |
691 // but we can't tell because we don't track it on stack until it becomes | |
692 // non-entrant. | |
693 | |
694 if (nm->is_not_entrant() && nm->can_not_entrant_be_converted()) { | |
695 nm->make_zombie(); | |
696 } else { | |
697 nm->make_not_entrant(); | |
698 } | |
699 } | |
700 } | |
701 } | |
702 | |
703 void CodeCache::make_marked_nmethods_not_entrant() { | |
704 assert_locked_or_safepoint(CodeCache_lock); | |
705 FOR_ALL_ALIVE_NMETHODS(nm) { | |
706 if (nm->is_marked_for_deoptimization()) { | |
707 nm->make_not_entrant(); | |
708 } | |
709 } | |
710 } | |
711 | |
712 void CodeCache::verify() { | |
713 _heap->verify(); | |
714 FOR_ALL_ALIVE_BLOBS(p) { | |
715 p->verify(); | |
716 } | |
717 } | |
718 | |
10405 | 719 void CodeCache::report_codemem_full() { |
720 _codemem_full_count++; | |
721 EventCodeCacheFull event; | |
722 if (event.should_commit()) { | |
723 event.set_startAddress((u8)low_bound()); | |
724 event.set_commitedTopAddress((u8)high()); | |
725 event.set_reservedTopAddress((u8)high_bound()); | |
726 event.set_entryCount(nof_blobs()); | |
727 event.set_methodCount(nof_nmethods()); | |
728 event.set_adaptorCount(nof_adapters()); | |
729 event.set_unallocatedCapacity(unallocated_capacity()/K); | |
730 event.set_fullCount(_codemem_full_count); | |
731 event.commit(); | |
732 } | |
733 } | |
734 | |
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735 void CodeCache::print_memory_overhead() { |
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736 size_t wasted_bytes = 0; |
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737 CodeBlob *cb; |
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738 for (cb = first(); cb != NULL; cb = next(cb)) { |
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739 HeapBlock* heap_block = ((HeapBlock*)cb) - 1; |
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740 wasted_bytes += heap_block->length() * CodeCacheSegmentSize - cb->size(); |
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741 } |
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742 // Print bytes that are allocated in the freelist |
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743 ttyLocker ttl; |
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744 tty->print_cr("Number of elements in freelist: %d", freelist_length()); |
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745 tty->print_cr("Allocated in freelist: %dkB", bytes_allocated_in_freelist()/K); |
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746 tty->print_cr("Unused bytes in CodeBlobs: %dkB", (int)(wasted_bytes/K)); |
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747 tty->print_cr("Segment map size: %dkB", allocated_segments()/K); // 1 byte per segment |
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748 } |
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749 |
0 | 750 //------------------------------------------------------------------------------------------------ |
751 // Non-product version | |
752 | |
753 #ifndef PRODUCT | |
754 | |
989 | 755 void CodeCache::print_trace(const char* event, CodeBlob* cb, int size) { |
756 if (PrintCodeCache2) { // Need to add a new flag | |
757 ResourceMark rm; | |
758 if (size == 0) size = cb->size(); | |
759 tty->print_cr("CodeCache %s: addr: " INTPTR_FORMAT ", size: 0x%x", event, cb, size); | |
760 } | |
761 } | |
762 | |
0 | 763 void CodeCache::print_internals() { |
764 int nmethodCount = 0; | |
765 int runtimeStubCount = 0; | |
766 int adapterCount = 0; | |
767 int deoptimizationStubCount = 0; | |
768 int uncommonTrapStubCount = 0; | |
769 int bufferBlobCount = 0; | |
770 int total = 0; | |
771 int nmethodAlive = 0; | |
772 int nmethodNotEntrant = 0; | |
773 int nmethodZombie = 0; | |
774 int nmethodUnloaded = 0; | |
775 int nmethodJava = 0; | |
776 int nmethodNative = 0; | |
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777 int max_nm_size = 0; |
0 | 778 ResourceMark rm; |
779 | |
780 CodeBlob *cb; | |
781 for (cb = first(); cb != NULL; cb = next(cb)) { | |
782 total++; | |
783 if (cb->is_nmethod()) { | |
784 nmethod* nm = (nmethod*)cb; | |
785 | |
786 if (Verbose && nm->method() != NULL) { | |
787 ResourceMark rm; | |
788 char *method_name = nm->method()->name_and_sig_as_C_string(); | |
789 tty->print("%s", method_name); | |
790 if(nm->is_alive()) { tty->print_cr(" alive"); } | |
791 if(nm->is_not_entrant()) { tty->print_cr(" not-entrant"); } | |
792 if(nm->is_zombie()) { tty->print_cr(" zombie"); } | |
793 } | |
794 | |
795 nmethodCount++; | |
796 | |
797 if(nm->is_alive()) { nmethodAlive++; } | |
798 if(nm->is_not_entrant()) { nmethodNotEntrant++; } | |
799 if(nm->is_zombie()) { nmethodZombie++; } | |
800 if(nm->is_unloaded()) { nmethodUnloaded++; } | |
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801 if(nm->method() != NULL && nm->is_native_method()) { nmethodNative++; } |
0 | 802 |
803 if(nm->method() != NULL && nm->is_java_method()) { | |
804 nmethodJava++; | |
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805 max_nm_size = MAX2(max_nm_size, nm->size()); |
0 | 806 } |
807 } else if (cb->is_runtime_stub()) { | |
808 runtimeStubCount++; | |
809 } else if (cb->is_deoptimization_stub()) { | |
810 deoptimizationStubCount++; | |
811 } else if (cb->is_uncommon_trap_stub()) { | |
812 uncommonTrapStubCount++; | |
813 } else if (cb->is_adapter_blob()) { | |
814 adapterCount++; | |
815 } else if (cb->is_buffer_blob()) { | |
816 bufferBlobCount++; | |
817 } | |
818 } | |
819 | |
820 int bucketSize = 512; | |
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821 int bucketLimit = max_nm_size / bucketSize + 1; |
6197 | 822 int *buckets = NEW_C_HEAP_ARRAY(int, bucketLimit, mtCode); |
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823 memset(buckets, 0, sizeof(int) * bucketLimit); |
0 | 824 |
825 for (cb = first(); cb != NULL; cb = next(cb)) { | |
826 if (cb->is_nmethod()) { | |
827 nmethod* nm = (nmethod*)cb; | |
828 if(nm->is_java_method()) { | |
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829 buckets[nm->size() / bucketSize]++; |
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830 } |
0 | 831 } |
832 } | |
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833 |
0 | 834 tty->print_cr("Code Cache Entries (total of %d)",total); |
835 tty->print_cr("-------------------------------------------------"); | |
836 tty->print_cr("nmethods: %d",nmethodCount); | |
837 tty->print_cr("\talive: %d",nmethodAlive); | |
838 tty->print_cr("\tnot_entrant: %d",nmethodNotEntrant); | |
839 tty->print_cr("\tzombie: %d",nmethodZombie); | |
840 tty->print_cr("\tunloaded: %d",nmethodUnloaded); | |
841 tty->print_cr("\tjava: %d",nmethodJava); | |
842 tty->print_cr("\tnative: %d",nmethodNative); | |
843 tty->print_cr("runtime_stubs: %d",runtimeStubCount); | |
844 tty->print_cr("adapters: %d",adapterCount); | |
845 tty->print_cr("buffer blobs: %d",bufferBlobCount); | |
846 tty->print_cr("deoptimization_stubs: %d",deoptimizationStubCount); | |
847 tty->print_cr("uncommon_traps: %d",uncommonTrapStubCount); | |
848 tty->print_cr("\nnmethod size distribution (non-zombie java)"); | |
849 tty->print_cr("-------------------------------------------------"); | |
850 | |
851 for(int i=0; i<bucketLimit; i++) { | |
852 if(buckets[i] != 0) { | |
853 tty->print("%d - %d bytes",i*bucketSize,(i+1)*bucketSize); | |
854 tty->fill_to(40); | |
855 tty->print_cr("%d",buckets[i]); | |
856 } | |
857 } | |
858 | |
6197 | 859 FREE_C_HEAP_ARRAY(int, buckets, mtCode); |
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860 print_memory_overhead(); |
0 | 861 } |
862 | |
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863 #endif // !PRODUCT |
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864 |
0 | 865 void CodeCache::print() { |
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866 print_summary(tty); |
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867 |
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868 #ifndef PRODUCT |
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869 if (!Verbose) return; |
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870 |
0 | 871 CodeBlob_sizes live; |
872 CodeBlob_sizes dead; | |
873 | |
874 FOR_ALL_BLOBS(p) { | |
875 if (!p->is_alive()) { | |
876 dead.add(p); | |
877 } else { | |
878 live.add(p); | |
879 } | |
880 } | |
881 | |
882 tty->print_cr("CodeCache:"); | |
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883 tty->print_cr("nmethod dependency checking time %fs", dependentCheckTime.seconds()); |
0 | 884 |
885 if (!live.is_empty()) { | |
886 live.print("live"); | |
887 } | |
888 if (!dead.is_empty()) { | |
889 dead.print("dead"); | |
890 } | |
891 | |
892 | |
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893 if (WizardMode) { |
0 | 894 // print the oop_map usage |
895 int code_size = 0; | |
896 int number_of_blobs = 0; | |
897 int number_of_oop_maps = 0; | |
898 int map_size = 0; | |
899 FOR_ALL_BLOBS(p) { | |
900 if (p->is_alive()) { | |
901 number_of_blobs++; | |
1748 | 902 code_size += p->code_size(); |
0 | 903 OopMapSet* set = p->oop_maps(); |
904 if (set != NULL) { | |
905 number_of_oop_maps += set->size(); | |
1748 | 906 map_size += set->heap_size(); |
0 | 907 } |
908 } | |
909 } | |
910 tty->print_cr("OopMaps"); | |
911 tty->print_cr(" #blobs = %d", number_of_blobs); | |
912 tty->print_cr(" code size = %d", code_size); | |
913 tty->print_cr(" #oop_maps = %d", number_of_oop_maps); | |
914 tty->print_cr(" map size = %d", map_size); | |
915 } | |
916 | |
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917 #endif // !PRODUCT |
0 | 918 } |
919 | |
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920 void CodeCache::print_summary(outputStream* st, bool detailed) { |
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921 size_t total = (_heap->high_boundary() - _heap->low_boundary()); |
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922 st->print_cr("CodeCache: size=" SIZE_FORMAT "Kb used=" SIZE_FORMAT |
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923 "Kb max_used=" SIZE_FORMAT "Kb free=" SIZE_FORMAT "Kb", |
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924 total/K, (total - unallocated_capacity())/K, |
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925 maxCodeCacheUsed/K, unallocated_capacity()/K); |
1907 | 926 |
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927 if (detailed) { |
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928 st->print_cr(" bounds [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT "]", |
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929 _heap->low_boundary(), |
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930 _heap->high(), |
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931 _heap->high_boundary()); |
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932 st->print_cr(" total_blobs=" UINT32_FORMAT " nmethods=" UINT32_FORMAT |
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933 " adapters=" UINT32_FORMAT, |
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934 nof_blobs(), nof_nmethods(), nof_adapters()); |
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935 st->print_cr(" compilation: %s", CompileBroker::should_compile_new_jobs() ? |
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936 "enabled" : Arguments::mode() == Arguments::_int ? |
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937 "disabled (interpreter mode)" : |
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938 "disabled (not enough contiguous free space left)"); |
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939 } |
1907 | 940 } |
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941 |
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942 void CodeCache::log_state(outputStream* st) { |
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943 st->print(" total_blobs='" UINT32_FORMAT "' nmethods='" UINT32_FORMAT "'" |
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944 " adapters='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'", |
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945 nof_blobs(), nof_nmethods(), nof_adapters(), |
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946 unallocated_capacity()); |
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947 } |
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948 |