Mercurial > hg > truffle
annotate src/share/vm/code/codeCache.cpp @ 9020:627dc359e918
Use correct method to access constant pool
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Thu, 11 Apr 2013 15:39:55 -0700 |
parents | 9deda4d8e126 |
children | ebb32c4589f3 a7fb14888912 |
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" | |
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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" | |
48 #include "utilities/xmlstream.hpp" | |
0 | 49 |
50 // Helper class for printing in CodeCache | |
51 | |
52 class CodeBlob_sizes { | |
53 private: | |
54 int count; | |
55 int total_size; | |
56 int header_size; | |
57 int code_size; | |
58 int stub_size; | |
59 int relocation_size; | |
60 int scopes_oop_size; | |
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61 int scopes_metadata_size; |
0 | 62 int scopes_data_size; |
63 int scopes_pcs_size; | |
64 | |
65 public: | |
66 CodeBlob_sizes() { | |
67 count = 0; | |
68 total_size = 0; | |
69 header_size = 0; | |
70 code_size = 0; | |
71 stub_size = 0; | |
72 relocation_size = 0; | |
73 scopes_oop_size = 0; | |
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74 scopes_metadata_size = 0; |
0 | 75 scopes_data_size = 0; |
76 scopes_pcs_size = 0; | |
77 } | |
78 | |
79 int total() { return total_size; } | |
80 bool is_empty() { return count == 0; } | |
81 | |
82 void print(const char* title) { | |
83 tty->print_cr(" #%d %s = %dK (hdr %d%%, loc %d%%, code %d%%, stub %d%%, [oops %d%%, data %d%%, pcs %d%%])", | |
84 count, | |
85 title, | |
86 total() / K, | |
87 header_size * 100 / total_size, | |
88 relocation_size * 100 / total_size, | |
89 code_size * 100 / total_size, | |
90 stub_size * 100 / total_size, | |
91 scopes_oop_size * 100 / total_size, | |
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92 scopes_metadata_size * 100 / total_size, |
0 | 93 scopes_data_size * 100 / total_size, |
94 scopes_pcs_size * 100 / total_size); | |
95 } | |
96 | |
97 void add(CodeBlob* cb) { | |
98 count++; | |
99 total_size += cb->size(); | |
100 header_size += cb->header_size(); | |
101 relocation_size += cb->relocation_size(); | |
102 if (cb->is_nmethod()) { | |
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103 nmethod* nm = cb->as_nmethod_or_null(); |
1748 | 104 code_size += nm->insts_size(); |
0 | 105 stub_size += nm->stub_size(); |
106 | |
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107 scopes_oop_size += nm->oops_size(); |
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108 scopes_metadata_size += nm->metadata_size(); |
0 | 109 scopes_data_size += nm->scopes_data_size(); |
110 scopes_pcs_size += nm->scopes_pcs_size(); | |
111 } else { | |
1748 | 112 code_size += cb->code_size(); |
0 | 113 } |
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; |
1202 | 127 nmethod* CodeCache::_saved_nmethods = NULL; |
0 | 128 |
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 |
0 | 175 CodeBlob* CodeCache::allocate(int size) { |
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) { | |
186 cb = (CodeBlob*)_heap->allocate(size); | |
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)", | |
195 (intptr_t)_heap->begin(), (intptr_t)_heap->end(), | |
196 (address)_heap->end() - (address)_heap->begin()); | |
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()); |
0 | 201 verify_if_often(); |
989 | 202 print_trace("allocation", cb, size); |
0 | 203 return cb; |
204 } | |
205 | |
206 void CodeCache::free(CodeBlob* cb) { | |
207 assert_locked_or_safepoint(CodeCache_lock); | |
208 verify_if_often(); | |
209 | |
989 | 210 print_trace("free", cb); |
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211 if (cb->is_nmethod()) { |
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212 _number_of_nmethods--; |
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213 if (((nmethod *)cb)->has_dependencies()) { |
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214 _number_of_nmethods_with_dependencies--; |
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215 } |
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216 } |
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217 if (cb->is_adapter_blob()) { |
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218 _number_of_adapters--; |
0 | 219 } |
220 _number_of_blobs--; | |
221 | |
222 _heap->deallocate(cb); | |
223 | |
224 verify_if_often(); | |
225 assert(_number_of_blobs >= 0, "sanity check"); | |
226 } | |
227 | |
228 | |
229 void CodeCache::commit(CodeBlob* cb) { | |
230 // this is called by nmethod::nmethod, which must already own CodeCache_lock | |
231 assert_locked_or_safepoint(CodeCache_lock); | |
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232 if (cb->is_nmethod()) { |
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233 _number_of_nmethods++; |
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234 if (((nmethod *)cb)->has_dependencies()) { |
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235 _number_of_nmethods_with_dependencies++; |
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236 } |
0 | 237 } |
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238 if (cb->is_adapter_blob()) { |
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239 _number_of_adapters++; |
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240 } |
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241 |
0 | 242 // flush the hardware I-cache |
1748 | 243 ICache::invalidate_range(cb->content_begin(), cb->content_size()); |
0 | 244 } |
245 | |
246 | |
247 void CodeCache::flush() { | |
248 assert_locked_or_safepoint(CodeCache_lock); | |
249 Unimplemented(); | |
250 } | |
251 | |
252 | |
253 // Iteration over CodeBlobs | |
254 | |
255 #define FOR_ALL_BLOBS(var) for (CodeBlob *var = first() ; var != NULL; var = next(var) ) | |
256 #define FOR_ALL_ALIVE_BLOBS(var) for (CodeBlob *var = alive(first()); var != NULL; var = alive(next(var))) | |
257 #define FOR_ALL_ALIVE_NMETHODS(var) for (nmethod *var = alive_nmethod(first()); var != NULL; var = alive_nmethod(next(var))) | |
258 | |
259 | |
260 bool CodeCache::contains(void *p) { | |
261 // It should be ok to call contains without holding a lock | |
262 return _heap->contains(p); | |
263 } | |
264 | |
265 | |
266 // This method is safe to call without holding the CodeCache_lock, as long as a dead codeblob is not | |
267 // looked up (i.e., one that has been marked for deletion). It only dependes on the _segmap to contain | |
268 // valid indices, which it will always do, as long as the CodeBlob is not in the process of being recycled. | |
269 CodeBlob* CodeCache::find_blob(void* start) { | |
270 CodeBlob* result = find_blob_unsafe(start); | |
271 if (result == NULL) return NULL; | |
272 // We could potientially look up non_entrant methods | |
273 guarantee(!result->is_zombie() || result->is_locked_by_vm() || is_error_reported(), "unsafe access to zombie method"); | |
274 return result; | |
275 } | |
276 | |
277 nmethod* CodeCache::find_nmethod(void* start) { | |
278 CodeBlob *cb = find_blob(start); | |
279 assert(cb == NULL || cb->is_nmethod(), "did not find an nmethod"); | |
280 return (nmethod*)cb; | |
281 } | |
282 | |
283 | |
284 void CodeCache::blobs_do(void f(CodeBlob* nm)) { | |
285 assert_locked_or_safepoint(CodeCache_lock); | |
286 FOR_ALL_BLOBS(p) { | |
287 f(p); | |
288 } | |
289 } | |
290 | |
291 | |
292 void CodeCache::nmethods_do(void f(nmethod* nm)) { | |
293 assert_locked_or_safepoint(CodeCache_lock); | |
294 FOR_ALL_BLOBS(nm) { | |
295 if (nm->is_nmethod()) f((nmethod*)nm); | |
296 } | |
297 } | |
298 | |
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299 void CodeCache::alive_nmethods_do(void f(nmethod* nm)) { |
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300 assert_locked_or_safepoint(CodeCache_lock); |
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301 FOR_ALL_ALIVE_NMETHODS(nm) { |
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302 f(nm); |
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303 } |
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304 } |
0 | 305 |
306 int CodeCache::alignment_unit() { | |
307 return (int)_heap->alignment_unit(); | |
308 } | |
309 | |
310 | |
311 int CodeCache::alignment_offset() { | |
312 return (int)_heap->alignment_offset(); | |
313 } | |
314 | |
315 | |
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316 // Mark nmethods for unloading if they contain otherwise unreachable |
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317 // oops. |
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318 void CodeCache::do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred) { |
0 | 319 assert_locked_or_safepoint(CodeCache_lock); |
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320 FOR_ALL_ALIVE_NMETHODS(nm) { |
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321 nm->do_unloading(is_alive, unloading_occurred); |
0 | 322 } |
323 } | |
324 | |
989 | 325 void CodeCache::blobs_do(CodeBlobClosure* f) { |
0 | 326 assert_locked_or_safepoint(CodeCache_lock); |
327 FOR_ALL_ALIVE_BLOBS(cb) { | |
989 | 328 f->do_code_blob(cb); |
329 | |
330 #ifdef ASSERT | |
331 if (cb->is_nmethod()) | |
332 ((nmethod*)cb)->verify_scavenge_root_oops(); | |
333 #endif //ASSERT | |
0 | 334 } |
335 } | |
336 | |
989 | 337 // Walk the list of methods which might contain non-perm oops. |
338 void CodeCache::scavenge_root_nmethods_do(CodeBlobClosure* f) { | |
339 assert_locked_or_safepoint(CodeCache_lock); | |
340 debug_only(mark_scavenge_root_nmethods()); | |
341 | |
342 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
343 debug_only(cur->clear_scavenge_root_marked()); | |
344 assert(cur->scavenge_root_not_marked(), ""); | |
345 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
346 | |
347 bool is_live = (!cur->is_zombie() && !cur->is_unloaded()); | |
348 #ifndef PRODUCT | |
349 if (TraceScavenge) { | |
350 cur->print_on(tty, is_live ? "scavenge root" : "dead scavenge root"); tty->cr(); | |
351 } | |
352 #endif //PRODUCT | |
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353 if (is_live) { |
989 | 354 // Perform cur->oops_do(f), maybe just once per nmethod. |
355 f->do_code_blob(cur); | |
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356 } |
989 | 357 } |
358 | |
359 // Check for stray marks. | |
360 debug_only(verify_perm_nmethods(NULL)); | |
361 } | |
362 | |
363 void CodeCache::add_scavenge_root_nmethod(nmethod* nm) { | |
364 assert_locked_or_safepoint(CodeCache_lock); | |
365 nm->set_on_scavenge_root_list(); | |
366 nm->set_scavenge_root_link(_scavenge_root_nmethods); | |
367 set_scavenge_root_nmethods(nm); | |
368 print_trace("add_scavenge_root", nm); | |
369 } | |
370 | |
371 void CodeCache::drop_scavenge_root_nmethod(nmethod* nm) { | |
372 assert_locked_or_safepoint(CodeCache_lock); | |
373 print_trace("drop_scavenge_root", nm); | |
374 nmethod* last = NULL; | |
375 nmethod* cur = scavenge_root_nmethods(); | |
376 while (cur != NULL) { | |
377 nmethod* next = cur->scavenge_root_link(); | |
378 if (cur == nm) { | |
379 if (last != NULL) | |
380 last->set_scavenge_root_link(next); | |
381 else set_scavenge_root_nmethods(next); | |
382 nm->set_scavenge_root_link(NULL); | |
383 nm->clear_on_scavenge_root_list(); | |
384 return; | |
385 } | |
386 last = cur; | |
387 cur = next; | |
388 } | |
389 assert(false, "should have been on list"); | |
390 } | |
391 | |
392 void CodeCache::prune_scavenge_root_nmethods() { | |
393 assert_locked_or_safepoint(CodeCache_lock); | |
394 debug_only(mark_scavenge_root_nmethods()); | |
395 | |
396 nmethod* last = NULL; | |
397 nmethod* cur = scavenge_root_nmethods(); | |
398 while (cur != NULL) { | |
399 nmethod* next = cur->scavenge_root_link(); | |
400 debug_only(cur->clear_scavenge_root_marked()); | |
401 assert(cur->scavenge_root_not_marked(), ""); | |
402 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
403 | |
404 if (!cur->is_zombie() && !cur->is_unloaded() | |
405 && cur->detect_scavenge_root_oops()) { | |
406 // Keep it. Advance 'last' to prevent deletion. | |
407 last = cur; | |
408 } else { | |
409 // Prune it from the list, so we don't have to look at it any more. | |
410 print_trace("prune_scavenge_root", cur); | |
411 cur->set_scavenge_root_link(NULL); | |
412 cur->clear_on_scavenge_root_list(); | |
413 if (last != NULL) | |
414 last->set_scavenge_root_link(next); | |
415 else set_scavenge_root_nmethods(next); | |
416 } | |
417 cur = next; | |
418 } | |
419 | |
420 // Check for stray marks. | |
421 debug_only(verify_perm_nmethods(NULL)); | |
422 } | |
423 | |
424 #ifndef PRODUCT | |
425 void CodeCache::asserted_non_scavengable_nmethods_do(CodeBlobClosure* f) { | |
426 // While we are here, verify the integrity of the list. | |
427 mark_scavenge_root_nmethods(); | |
428 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
429 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
430 cur->clear_scavenge_root_marked(); | |
431 } | |
432 verify_perm_nmethods(f); | |
433 } | |
434 | |
435 // Temporarily mark nmethods that are claimed to be on the non-perm list. | |
436 void CodeCache::mark_scavenge_root_nmethods() { | |
437 FOR_ALL_ALIVE_BLOBS(cb) { | |
438 if (cb->is_nmethod()) { | |
439 nmethod *nm = (nmethod*)cb; | |
440 assert(nm->scavenge_root_not_marked(), "clean state"); | |
441 if (nm->on_scavenge_root_list()) | |
442 nm->set_scavenge_root_marked(); | |
443 } | |
444 } | |
445 } | |
446 | |
447 // If the closure is given, run it on the unlisted nmethods. | |
448 // Also make sure that the effects of mark_scavenge_root_nmethods is gone. | |
449 void CodeCache::verify_perm_nmethods(CodeBlobClosure* f_or_null) { | |
450 FOR_ALL_ALIVE_BLOBS(cb) { | |
451 bool call_f = (f_or_null != NULL); | |
452 if (cb->is_nmethod()) { | |
453 nmethod *nm = (nmethod*)cb; | |
454 assert(nm->scavenge_root_not_marked(), "must be already processed"); | |
455 if (nm->on_scavenge_root_list()) | |
456 call_f = false; // don't show this one to the client | |
457 nm->verify_scavenge_root_oops(); | |
458 } else { | |
459 call_f = false; // not an nmethod | |
460 } | |
461 if (call_f) f_or_null->do_code_blob(cb); | |
462 } | |
463 } | |
464 #endif //PRODUCT | |
465 | |
1202 | 466 |
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467 nmethod* CodeCache::find_and_remove_saved_code(Method* m) { |
1202 | 468 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
469 nmethod* saved = _saved_nmethods; | |
470 nmethod* prev = NULL; | |
471 while (saved != NULL) { | |
472 if (saved->is_in_use() && saved->method() == m) { | |
473 if (prev != NULL) { | |
474 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
475 } else { | |
476 _saved_nmethods = saved->saved_nmethod_link(); | |
477 } | |
478 assert(saved->is_speculatively_disconnected(), "shouldn't call for other nmethods"); | |
479 saved->set_speculatively_disconnected(false); | |
480 saved->set_saved_nmethod_link(NULL); | |
481 if (PrintMethodFlushing) { | |
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482 saved->print_on(tty, " ### nmethod is reconnected\n"); |
1202 | 483 } |
484 if (LogCompilation && (xtty != NULL)) { | |
485 ttyLocker ttyl; | |
486 xtty->begin_elem("nmethod_reconnected compile_id='%3d'", saved->compile_id()); | |
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487 xtty->method(m); |
1202 | 488 xtty->stamp(); |
489 xtty->end_elem(); | |
490 } | |
491 return saved; | |
492 } | |
493 prev = saved; | |
494 saved = saved->saved_nmethod_link(); | |
495 } | |
496 return NULL; | |
497 } | |
498 | |
499 void CodeCache::remove_saved_code(nmethod* nm) { | |
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500 // For conc swpr this will be called with CodeCache_lock taken by caller |
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501 assert_locked_or_safepoint(CodeCache_lock); |
1202 | 502 assert(nm->is_speculatively_disconnected(), "shouldn't call for other nmethods"); |
503 nmethod* saved = _saved_nmethods; | |
504 nmethod* prev = NULL; | |
505 while (saved != NULL) { | |
506 if (saved == nm) { | |
507 if (prev != NULL) { | |
508 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
509 } else { | |
510 _saved_nmethods = saved->saved_nmethod_link(); | |
511 } | |
512 if (LogCompilation && (xtty != NULL)) { | |
513 ttyLocker ttyl; | |
514 xtty->begin_elem("nmethod_removed compile_id='%3d'", nm->compile_id()); | |
515 xtty->stamp(); | |
516 xtty->end_elem(); | |
517 } | |
518 return; | |
519 } | |
520 prev = saved; | |
521 saved = saved->saved_nmethod_link(); | |
522 } | |
523 ShouldNotReachHere(); | |
524 } | |
525 | |
526 void CodeCache::speculatively_disconnect(nmethod* nm) { | |
527 assert_locked_or_safepoint(CodeCache_lock); | |
528 assert(nm->is_in_use() && !nm->is_speculatively_disconnected(), "should only disconnect live nmethods"); | |
529 nm->set_saved_nmethod_link(_saved_nmethods); | |
530 _saved_nmethods = nm; | |
531 if (PrintMethodFlushing) { | |
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532 nm->print_on(tty, " ### nmethod is speculatively disconnected\n"); |
1202 | 533 } |
534 if (LogCompilation && (xtty != NULL)) { | |
535 ttyLocker ttyl; | |
536 xtty->begin_elem("nmethod_disconnected compile_id='%3d'", nm->compile_id()); | |
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537 xtty->method(nm->method()); |
1202 | 538 xtty->stamp(); |
539 xtty->end_elem(); | |
540 } | |
541 nm->method()->clear_code(); | |
542 nm->set_speculatively_disconnected(true); | |
543 } | |
544 | |
545 | |
0 | 546 void CodeCache::gc_prologue() { |
989 | 547 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_epilogue must be called"); |
0 | 548 } |
549 | |
550 | |
551 void CodeCache::gc_epilogue() { | |
552 assert_locked_or_safepoint(CodeCache_lock); | |
553 FOR_ALL_ALIVE_BLOBS(cb) { | |
554 if (cb->is_nmethod()) { | |
555 nmethod *nm = (nmethod*)cb; | |
556 assert(!nm->is_unloaded(), "Tautology"); | |
557 if (needs_cache_clean()) { | |
558 nm->cleanup_inline_caches(); | |
559 } | |
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560 DEBUG_ONLY(nm->verify()); |
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561 nm->fix_oop_relocations(); |
0 | 562 } |
563 } | |
564 set_needs_cache_clean(false); | |
989 | 565 prune_scavenge_root_nmethods(); |
566 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); | |
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567 |
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568 #ifdef ASSERT |
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569 // make sure that we aren't leaking icholders |
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570 int count = 0; |
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571 FOR_ALL_BLOBS(cb) { |
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572 if (cb->is_nmethod()) { |
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573 RelocIterator iter((nmethod*)cb); |
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574 while(iter.next()) { |
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575 if (iter.type() == relocInfo::virtual_call_type) { |
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576 if (CompiledIC::is_icholder_call_site(iter.virtual_call_reloc())) { |
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577 CompiledIC *ic = CompiledIC_at(iter.reloc()); |
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578 if (TraceCompiledIC) { |
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579 tty->print("noticed icholder " INTPTR_FORMAT " ", ic->cached_icholder()); |
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580 ic->print(); |
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581 } |
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582 assert(ic->cached_icholder() != NULL, "must be non-NULL"); |
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583 count++; |
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584 } |
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585 } |
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586 } |
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587 } |
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588 } |
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589 |
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590 assert(count + InlineCacheBuffer::pending_icholder_count() + CompiledICHolder::live_not_claimed_count() == |
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591 CompiledICHolder::live_count(), "must agree"); |
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592 #endif |
0 | 593 } |
594 | |
595 | |
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596 void CodeCache::verify_oops() { |
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597 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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598 VerifyOopClosure voc; |
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599 FOR_ALL_ALIVE_BLOBS(cb) { |
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600 if (cb->is_nmethod()) { |
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601 nmethod *nm = (nmethod*)cb; |
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602 nm->oops_do(&voc); |
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603 nm->verify_oop_relocations(); |
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604 } |
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605 } |
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606 } |
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607 |
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608 |
0 | 609 address CodeCache::first_address() { |
610 assert_locked_or_safepoint(CodeCache_lock); | |
611 return (address)_heap->begin(); | |
612 } | |
613 | |
614 | |
615 address CodeCache::last_address() { | |
616 assert_locked_or_safepoint(CodeCache_lock); | |
617 return (address)_heap->end(); | |
618 } | |
619 | |
620 | |
621 void icache_init(); | |
622 | |
623 void CodeCache::initialize() { | |
624 assert(CodeCacheSegmentSize >= (uintx)CodeEntryAlignment, "CodeCacheSegmentSize must be large enough to align entry points"); | |
625 #ifdef COMPILER2 | |
626 assert(CodeCacheSegmentSize >= (uintx)OptoLoopAlignment, "CodeCacheSegmentSize must be large enough to align inner loops"); | |
627 #endif | |
628 assert(CodeCacheSegmentSize >= sizeof(jdouble), "CodeCacheSegmentSize must be large enough to align constants"); | |
629 // This was originally just a check of the alignment, causing failure, instead, round | |
630 // the code cache to the page size. In particular, Solaris is moving to a larger | |
631 // default page size. | |
632 CodeCacheExpansionSize = round_to(CodeCacheExpansionSize, os::vm_page_size()); | |
633 InitialCodeCacheSize = round_to(InitialCodeCacheSize, os::vm_page_size()); | |
634 ReservedCodeCacheSize = round_to(ReservedCodeCacheSize, os::vm_page_size()); | |
635 if (!_heap->reserve(ReservedCodeCacheSize, InitialCodeCacheSize, CodeCacheSegmentSize)) { | |
636 vm_exit_during_initialization("Could not reserve enough space for code cache"); | |
637 } | |
638 | |
639 MemoryService::add_code_heap_memory_pool(_heap); | |
640 | |
641 // Initialize ICache flush mechanism | |
642 // This service is needed for os::register_code_area | |
643 icache_init(); | |
644 | |
645 // Give OS a chance to register generated code area. | |
646 // This is used on Windows 64 bit platforms to register | |
647 // Structured Exception Handlers for our generated code. | |
648 os::register_code_area(_heap->low_boundary(), _heap->high_boundary()); | |
649 } | |
650 | |
651 | |
652 void codeCache_init() { | |
653 CodeCache::initialize(); | |
654 } | |
655 | |
656 //------------------------------------------------------------------------------------------------ | |
657 | |
658 int CodeCache::number_of_nmethods_with_dependencies() { | |
659 return _number_of_nmethods_with_dependencies; | |
660 } | |
661 | |
662 void CodeCache::clear_inline_caches() { | |
663 assert_locked_or_safepoint(CodeCache_lock); | |
664 FOR_ALL_ALIVE_NMETHODS(nm) { | |
665 nm->clear_inline_caches(); | |
666 } | |
667 } | |
668 | |
669 #ifndef PRODUCT | |
670 // used to keep track of how much time is spent in mark_for_deoptimization | |
671 static elapsedTimer dependentCheckTime; | |
672 static int dependentCheckCount = 0; | |
673 #endif // PRODUCT | |
674 | |
675 | |
676 int CodeCache::mark_for_deoptimization(DepChange& changes) { | |
677 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
678 | |
679 #ifndef PRODUCT | |
680 dependentCheckTime.start(); | |
681 dependentCheckCount++; | |
682 #endif // PRODUCT | |
683 | |
684 int number_of_marked_CodeBlobs = 0; | |
685 | |
686 // search the hierarchy looking for nmethods which are affected by the loading of this class | |
687 | |
688 // then search the interfaces this class implements looking for nmethods | |
689 // which might be dependent of the fact that an interface only had one | |
690 // implementor. | |
691 | |
692 { No_Safepoint_Verifier nsv; | |
693 for (DepChange::ContextStream str(changes, nsv); str.next(); ) { | |
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694 Klass* d = str.klass(); |
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695 number_of_marked_CodeBlobs += InstanceKlass::cast(d)->mark_dependent_nmethods(changes); |
0 | 696 } |
697 } | |
698 | |
699 if (VerifyDependencies) { | |
700 // Turn off dependency tracing while actually testing deps. | |
701 NOT_PRODUCT( FlagSetting fs(TraceDependencies, false) ); | |
702 FOR_ALL_ALIVE_NMETHODS(nm) { | |
703 if (!nm->is_marked_for_deoptimization() && | |
704 nm->check_all_dependencies()) { | |
705 ResourceMark rm; | |
706 tty->print_cr("Should have been marked for deoptimization:"); | |
707 changes.print(); | |
708 nm->print(); | |
709 nm->print_dependencies(); | |
710 } | |
711 } | |
712 } | |
713 | |
714 #ifndef PRODUCT | |
715 dependentCheckTime.stop(); | |
716 #endif // PRODUCT | |
717 | |
718 return number_of_marked_CodeBlobs; | |
719 } | |
720 | |
721 | |
722 #ifdef HOTSWAP | |
723 int CodeCache::mark_for_evol_deoptimization(instanceKlassHandle dependee) { | |
724 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
725 int number_of_marked_CodeBlobs = 0; | |
726 | |
727 // Deoptimize all methods of the evolving class itself | |
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728 Array<Method*>* old_methods = dependee->methods(); |
0 | 729 for (int i = 0; i < old_methods->length(); i++) { |
730 ResourceMark rm; | |
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731 Method* old_method = old_methods->at(i); |
0 | 732 nmethod *nm = old_method->code(); |
733 if (nm != NULL) { | |
734 nm->mark_for_deoptimization(); | |
735 number_of_marked_CodeBlobs++; | |
736 } | |
737 } | |
738 | |
739 FOR_ALL_ALIVE_NMETHODS(nm) { | |
740 if (nm->is_marked_for_deoptimization()) { | |
741 // ...Already marked in the previous pass; don't count it again. | |
742 } else if (nm->is_evol_dependent_on(dependee())) { | |
743 ResourceMark rm; | |
744 nm->mark_for_deoptimization(); | |
745 number_of_marked_CodeBlobs++; | |
746 } else { | |
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747 // flush caches in case they refer to a redefined Method* |
0 | 748 nm->clear_inline_caches(); |
749 } | |
750 } | |
751 | |
752 return number_of_marked_CodeBlobs; | |
753 } | |
754 #endif // HOTSWAP | |
755 | |
756 | |
757 // Deoptimize all methods | |
758 void CodeCache::mark_all_nmethods_for_deoptimization() { | |
759 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
760 FOR_ALL_ALIVE_NMETHODS(nm) { | |
761 nm->mark_for_deoptimization(); | |
762 } | |
763 } | |
764 | |
765 | |
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766 int CodeCache::mark_for_deoptimization(Method* dependee) { |
0 | 767 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
768 int number_of_marked_CodeBlobs = 0; | |
769 | |
770 FOR_ALL_ALIVE_NMETHODS(nm) { | |
771 if (nm->is_dependent_on_method(dependee)) { | |
772 ResourceMark rm; | |
773 nm->mark_for_deoptimization(); | |
774 number_of_marked_CodeBlobs++; | |
775 } | |
776 } | |
777 | |
778 return number_of_marked_CodeBlobs; | |
779 } | |
780 | |
781 void CodeCache::make_marked_nmethods_zombies() { | |
782 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
783 FOR_ALL_ALIVE_NMETHODS(nm) { | |
784 if (nm->is_marked_for_deoptimization()) { | |
785 | |
786 // If the nmethod has already been made non-entrant and it can be converted | |
787 // then zombie it now. Otherwise make it non-entrant and it will eventually | |
788 // be zombied when it is no longer seen on the stack. Note that the nmethod | |
789 // might be "entrant" and not on the stack and so could be zombied immediately | |
790 // but we can't tell because we don't track it on stack until it becomes | |
791 // non-entrant. | |
792 | |
793 if (nm->is_not_entrant() && nm->can_not_entrant_be_converted()) { | |
794 nm->make_zombie(); | |
795 } else { | |
796 nm->make_not_entrant(); | |
797 } | |
798 } | |
799 } | |
800 } | |
801 | |
802 void CodeCache::make_marked_nmethods_not_entrant() { | |
803 assert_locked_or_safepoint(CodeCache_lock); | |
804 FOR_ALL_ALIVE_NMETHODS(nm) { | |
805 if (nm->is_marked_for_deoptimization()) { | |
806 nm->make_not_entrant(); | |
807 } | |
808 } | |
809 } | |
810 | |
811 void CodeCache::verify() { | |
812 _heap->verify(); | |
813 FOR_ALL_ALIVE_BLOBS(p) { | |
814 p->verify(); | |
815 } | |
816 } | |
817 | |
818 //------------------------------------------------------------------------------------------------ | |
819 // Non-product version | |
820 | |
821 #ifndef PRODUCT | |
822 | |
823 void CodeCache::verify_if_often() { | |
824 if (VerifyCodeCacheOften) { | |
825 _heap->verify(); | |
826 } | |
827 } | |
828 | |
989 | 829 void CodeCache::print_trace(const char* event, CodeBlob* cb, int size) { |
830 if (PrintCodeCache2) { // Need to add a new flag | |
831 ResourceMark rm; | |
832 if (size == 0) size = cb->size(); | |
833 tty->print_cr("CodeCache %s: addr: " INTPTR_FORMAT ", size: 0x%x", event, cb, size); | |
834 } | |
835 } | |
836 | |
0 | 837 void CodeCache::print_internals() { |
838 int nmethodCount = 0; | |
839 int runtimeStubCount = 0; | |
840 int adapterCount = 0; | |
841 int deoptimizationStubCount = 0; | |
842 int uncommonTrapStubCount = 0; | |
843 int bufferBlobCount = 0; | |
844 int total = 0; | |
845 int nmethodAlive = 0; | |
846 int nmethodNotEntrant = 0; | |
847 int nmethodZombie = 0; | |
848 int nmethodUnloaded = 0; | |
849 int nmethodJava = 0; | |
850 int nmethodNative = 0; | |
851 int maxCodeSize = 0; | |
852 ResourceMark rm; | |
853 | |
854 CodeBlob *cb; | |
855 for (cb = first(); cb != NULL; cb = next(cb)) { | |
856 total++; | |
857 if (cb->is_nmethod()) { | |
858 nmethod* nm = (nmethod*)cb; | |
859 | |
860 if (Verbose && nm->method() != NULL) { | |
861 ResourceMark rm; | |
862 char *method_name = nm->method()->name_and_sig_as_C_string(); | |
863 tty->print("%s", method_name); | |
864 if(nm->is_alive()) { tty->print_cr(" alive"); } | |
865 if(nm->is_not_entrant()) { tty->print_cr(" not-entrant"); } | |
866 if(nm->is_zombie()) { tty->print_cr(" zombie"); } | |
867 } | |
868 | |
869 nmethodCount++; | |
870 | |
871 if(nm->is_alive()) { nmethodAlive++; } | |
872 if(nm->is_not_entrant()) { nmethodNotEntrant++; } | |
873 if(nm->is_zombie()) { nmethodZombie++; } | |
874 if(nm->is_unloaded()) { nmethodUnloaded++; } | |
875 if(nm->is_native_method()) { nmethodNative++; } | |
876 | |
877 if(nm->method() != NULL && nm->is_java_method()) { | |
878 nmethodJava++; | |
1748 | 879 if (nm->insts_size() > maxCodeSize) { |
880 maxCodeSize = nm->insts_size(); | |
0 | 881 } |
882 } | |
883 } else if (cb->is_runtime_stub()) { | |
884 runtimeStubCount++; | |
885 } else if (cb->is_deoptimization_stub()) { | |
886 deoptimizationStubCount++; | |
887 } else if (cb->is_uncommon_trap_stub()) { | |
888 uncommonTrapStubCount++; | |
889 } else if (cb->is_adapter_blob()) { | |
890 adapterCount++; | |
891 } else if (cb->is_buffer_blob()) { | |
892 bufferBlobCount++; | |
893 } | |
894 } | |
895 | |
896 int bucketSize = 512; | |
897 int bucketLimit = maxCodeSize / bucketSize + 1; | |
6197 | 898 int *buckets = NEW_C_HEAP_ARRAY(int, bucketLimit, mtCode); |
0 | 899 memset(buckets,0,sizeof(int) * bucketLimit); |
900 | |
901 for (cb = first(); cb != NULL; cb = next(cb)) { | |
902 if (cb->is_nmethod()) { | |
903 nmethod* nm = (nmethod*)cb; | |
904 if(nm->is_java_method()) { | |
1748 | 905 buckets[nm->insts_size() / bucketSize]++; |
0 | 906 } |
907 } | |
908 } | |
909 tty->print_cr("Code Cache Entries (total of %d)",total); | |
910 tty->print_cr("-------------------------------------------------"); | |
911 tty->print_cr("nmethods: %d",nmethodCount); | |
912 tty->print_cr("\talive: %d",nmethodAlive); | |
913 tty->print_cr("\tnot_entrant: %d",nmethodNotEntrant); | |
914 tty->print_cr("\tzombie: %d",nmethodZombie); | |
915 tty->print_cr("\tunloaded: %d",nmethodUnloaded); | |
916 tty->print_cr("\tjava: %d",nmethodJava); | |
917 tty->print_cr("\tnative: %d",nmethodNative); | |
918 tty->print_cr("runtime_stubs: %d",runtimeStubCount); | |
919 tty->print_cr("adapters: %d",adapterCount); | |
920 tty->print_cr("buffer blobs: %d",bufferBlobCount); | |
921 tty->print_cr("deoptimization_stubs: %d",deoptimizationStubCount); | |
922 tty->print_cr("uncommon_traps: %d",uncommonTrapStubCount); | |
923 tty->print_cr("\nnmethod size distribution (non-zombie java)"); | |
924 tty->print_cr("-------------------------------------------------"); | |
925 | |
926 for(int i=0; i<bucketLimit; i++) { | |
927 if(buckets[i] != 0) { | |
928 tty->print("%d - %d bytes",i*bucketSize,(i+1)*bucketSize); | |
929 tty->fill_to(40); | |
930 tty->print_cr("%d",buckets[i]); | |
931 } | |
932 } | |
933 | |
6197 | 934 FREE_C_HEAP_ARRAY(int, buckets, mtCode); |
0 | 935 } |
936 | |
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937 #endif // !PRODUCT |
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938 |
0 | 939 void CodeCache::print() { |
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940 print_summary(tty); |
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941 |
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942 #ifndef PRODUCT |
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943 if (!Verbose) return; |
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944 |
0 | 945 CodeBlob_sizes live; |
946 CodeBlob_sizes dead; | |
947 | |
948 FOR_ALL_BLOBS(p) { | |
949 if (!p->is_alive()) { | |
950 dead.add(p); | |
951 } else { | |
952 live.add(p); | |
953 } | |
954 } | |
955 | |
956 tty->print_cr("CodeCache:"); | |
957 | |
958 tty->print_cr("nmethod dependency checking time %f", dependentCheckTime.seconds(), | |
959 dependentCheckTime.seconds() / dependentCheckCount); | |
960 | |
961 if (!live.is_empty()) { | |
962 live.print("live"); | |
963 } | |
964 if (!dead.is_empty()) { | |
965 dead.print("dead"); | |
966 } | |
967 | |
968 | |
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969 if (WizardMode) { |
0 | 970 // print the oop_map usage |
971 int code_size = 0; | |
972 int number_of_blobs = 0; | |
973 int number_of_oop_maps = 0; | |
974 int map_size = 0; | |
975 FOR_ALL_BLOBS(p) { | |
976 if (p->is_alive()) { | |
977 number_of_blobs++; | |
1748 | 978 code_size += p->code_size(); |
0 | 979 OopMapSet* set = p->oop_maps(); |
980 if (set != NULL) { | |
981 number_of_oop_maps += set->size(); | |
1748 | 982 map_size += set->heap_size(); |
0 | 983 } |
984 } | |
985 } | |
986 tty->print_cr("OopMaps"); | |
987 tty->print_cr(" #blobs = %d", number_of_blobs); | |
988 tty->print_cr(" code size = %d", code_size); | |
989 tty->print_cr(" #oop_maps = %d", number_of_oop_maps); | |
990 tty->print_cr(" map size = %d", map_size); | |
991 } | |
992 | |
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993 #endif // !PRODUCT |
0 | 994 } |
995 | |
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996 void CodeCache::print_summary(outputStream* st, bool detailed) { |
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997 size_t total = (_heap->high_boundary() - _heap->low_boundary()); |
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998 st->print_cr("CodeCache: size=" SIZE_FORMAT "Kb used=" SIZE_FORMAT |
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999 "Kb max_used=" SIZE_FORMAT "Kb free=" SIZE_FORMAT |
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1000 "Kb max_free_chunk=" SIZE_FORMAT "Kb", |
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1001 total/K, (total - unallocated_capacity())/K, |
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1002 maxCodeCacheUsed/K, unallocated_capacity()/K, largest_free_block()/K); |
1907 | 1003 |
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1004 if (detailed) { |
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1005 st->print_cr(" bounds [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT "]", |
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1006 _heap->low_boundary(), |
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1007 _heap->high(), |
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1008 _heap->high_boundary()); |
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1009 st->print_cr(" total_blobs=" UINT32_FORMAT " nmethods=" UINT32_FORMAT |
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1010 " adapters=" UINT32_FORMAT, |
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1011 nof_blobs(), nof_nmethods(), nof_adapters()); |
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1012 st->print_cr(" compilation: %s", CompileBroker::should_compile_new_jobs() ? |
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1013 "enabled" : Arguments::mode() == Arguments::_int ? |
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1014 "disabled (interpreter mode)" : |
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1015 "disabled (not enough contiguous free space left)"); |
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1016 } |
1907 | 1017 } |
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1018 |
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1019 void CodeCache::log_state(outputStream* st) { |
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1020 st->print(" total_blobs='" UINT32_FORMAT "' nmethods='" UINT32_FORMAT "'" |
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1021 " adapters='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'" |
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1022 " largest_free_block='" SIZE_FORMAT "'", |
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1023 nof_blobs(), nof_nmethods(), nof_adapters(), |
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1024 unallocated_capacity(), largest_free_block()); |
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1025 } |
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1026 |
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1027 size_t CodeCache::largest_free_block() { |
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1028 // This is called both with and without CodeCache_lock held so |
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1029 // handle both cases. |
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1030 if (CodeCache_lock->owned_by_self()) { |
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1031 return _heap->largest_free_block(); |
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1032 } else { |
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1033 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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1034 return _heap->largest_free_block(); |
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1035 } |
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1036 } |