Mercurial > hg > truffle
annotate src/share/vm/code/codeCache.cpp @ 10252:712a1e9c91f3
8013063: nsk/jvmti/RetransformClasses/retransform001 failed debug version on os::free
Summary: Clear out class_file_bytes so they aren't deallocated twice
Reviewed-by: dcubed, sspitsyn
author | coleenp |
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date | Tue, 07 May 2013 09:46:15 -0400 |
parents | 0cfa93c2fcc4 |
children | 91eba9f82325 |
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 |
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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()); |
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 | |
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466 /** |
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467 * Remove and return nmethod from the saved code list in order to reanimate it. |
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468 */ |
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469 nmethod* CodeCache::reanimate_saved_code(Method* m) { |
1202 | 470 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
471 nmethod* saved = _saved_nmethods; | |
472 nmethod* prev = NULL; | |
473 while (saved != NULL) { | |
474 if (saved->is_in_use() && saved->method() == m) { | |
475 if (prev != NULL) { | |
476 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
477 } else { | |
478 _saved_nmethods = saved->saved_nmethod_link(); | |
479 } | |
480 assert(saved->is_speculatively_disconnected(), "shouldn't call for other nmethods"); | |
481 saved->set_speculatively_disconnected(false); | |
482 saved->set_saved_nmethod_link(NULL); | |
483 if (PrintMethodFlushing) { | |
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484 saved->print_on(tty, " ### nmethod is reconnected"); |
1202 | 485 } |
486 if (LogCompilation && (xtty != NULL)) { | |
487 ttyLocker ttyl; | |
488 xtty->begin_elem("nmethod_reconnected compile_id='%3d'", saved->compile_id()); | |
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489 xtty->method(m); |
1202 | 490 xtty->stamp(); |
491 xtty->end_elem(); | |
492 } | |
493 return saved; | |
494 } | |
495 prev = saved; | |
496 saved = saved->saved_nmethod_link(); | |
497 } | |
498 return NULL; | |
499 } | |
500 | |
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501 /** |
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502 * Remove nmethod from the saved code list in order to discard it permanently |
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503 */ |
1202 | 504 void CodeCache::remove_saved_code(nmethod* nm) { |
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505 // For conc swpr this will be called with CodeCache_lock taken by caller |
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506 assert_locked_or_safepoint(CodeCache_lock); |
1202 | 507 assert(nm->is_speculatively_disconnected(), "shouldn't call for other nmethods"); |
508 nmethod* saved = _saved_nmethods; | |
509 nmethod* prev = NULL; | |
510 while (saved != NULL) { | |
511 if (saved == nm) { | |
512 if (prev != NULL) { | |
513 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
514 } else { | |
515 _saved_nmethods = saved->saved_nmethod_link(); | |
516 } | |
517 if (LogCompilation && (xtty != NULL)) { | |
518 ttyLocker ttyl; | |
519 xtty->begin_elem("nmethod_removed compile_id='%3d'", nm->compile_id()); | |
520 xtty->stamp(); | |
521 xtty->end_elem(); | |
522 } | |
523 return; | |
524 } | |
525 prev = saved; | |
526 saved = saved->saved_nmethod_link(); | |
527 } | |
528 ShouldNotReachHere(); | |
529 } | |
530 | |
531 void CodeCache::speculatively_disconnect(nmethod* nm) { | |
532 assert_locked_or_safepoint(CodeCache_lock); | |
533 assert(nm->is_in_use() && !nm->is_speculatively_disconnected(), "should only disconnect live nmethods"); | |
534 nm->set_saved_nmethod_link(_saved_nmethods); | |
535 _saved_nmethods = nm; | |
536 if (PrintMethodFlushing) { | |
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537 nm->print_on(tty, " ### nmethod is speculatively disconnected"); |
1202 | 538 } |
539 if (LogCompilation && (xtty != NULL)) { | |
540 ttyLocker ttyl; | |
541 xtty->begin_elem("nmethod_disconnected compile_id='%3d'", nm->compile_id()); | |
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542 xtty->method(nm->method()); |
1202 | 543 xtty->stamp(); |
544 xtty->end_elem(); | |
545 } | |
546 nm->method()->clear_code(); | |
547 nm->set_speculatively_disconnected(true); | |
548 } | |
549 | |
550 | |
0 | 551 void CodeCache::gc_prologue() { |
989 | 552 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_epilogue must be called"); |
0 | 553 } |
554 | |
555 | |
556 void CodeCache::gc_epilogue() { | |
557 assert_locked_or_safepoint(CodeCache_lock); | |
558 FOR_ALL_ALIVE_BLOBS(cb) { | |
559 if (cb->is_nmethod()) { | |
560 nmethod *nm = (nmethod*)cb; | |
561 assert(!nm->is_unloaded(), "Tautology"); | |
562 if (needs_cache_clean()) { | |
563 nm->cleanup_inline_caches(); | |
564 } | |
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565 DEBUG_ONLY(nm->verify()); |
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566 nm->fix_oop_relocations(); |
0 | 567 } |
568 } | |
569 set_needs_cache_clean(false); | |
989 | 570 prune_scavenge_root_nmethods(); |
571 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); | |
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572 |
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573 #ifdef ASSERT |
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574 // make sure that we aren't leaking icholders |
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575 int count = 0; |
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576 FOR_ALL_BLOBS(cb) { |
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577 if (cb->is_nmethod()) { |
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578 RelocIterator iter((nmethod*)cb); |
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579 while(iter.next()) { |
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580 if (iter.type() == relocInfo::virtual_call_type) { |
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581 if (CompiledIC::is_icholder_call_site(iter.virtual_call_reloc())) { |
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582 CompiledIC *ic = CompiledIC_at(iter.reloc()); |
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583 if (TraceCompiledIC) { |
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584 tty->print("noticed icholder " INTPTR_FORMAT " ", ic->cached_icholder()); |
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585 ic->print(); |
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586 } |
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587 assert(ic->cached_icholder() != NULL, "must be non-NULL"); |
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588 count++; |
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589 } |
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590 } |
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591 } |
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592 } |
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593 } |
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594 |
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595 assert(count + InlineCacheBuffer::pending_icholder_count() + CompiledICHolder::live_not_claimed_count() == |
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596 CompiledICHolder::live_count(), "must agree"); |
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597 #endif |
0 | 598 } |
599 | |
600 | |
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601 void CodeCache::verify_oops() { |
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602 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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603 VerifyOopClosure voc; |
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604 FOR_ALL_ALIVE_BLOBS(cb) { |
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605 if (cb->is_nmethod()) { |
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606 nmethod *nm = (nmethod*)cb; |
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607 nm->oops_do(&voc); |
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608 nm->verify_oop_relocations(); |
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609 } |
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610 } |
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611 } |
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612 |
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613 |
0 | 614 address CodeCache::first_address() { |
615 assert_locked_or_safepoint(CodeCache_lock); | |
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616 return (address)_heap->low_boundary(); |
0 | 617 } |
618 | |
619 | |
620 address CodeCache::last_address() { | |
621 assert_locked_or_safepoint(CodeCache_lock); | |
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622 return (address)_heap->high(); |
0 | 623 } |
624 | |
625 | |
626 void icache_init(); | |
627 | |
628 void CodeCache::initialize() { | |
629 assert(CodeCacheSegmentSize >= (uintx)CodeEntryAlignment, "CodeCacheSegmentSize must be large enough to align entry points"); | |
630 #ifdef COMPILER2 | |
631 assert(CodeCacheSegmentSize >= (uintx)OptoLoopAlignment, "CodeCacheSegmentSize must be large enough to align inner loops"); | |
632 #endif | |
633 assert(CodeCacheSegmentSize >= sizeof(jdouble), "CodeCacheSegmentSize must be large enough to align constants"); | |
634 // This was originally just a check of the alignment, causing failure, instead, round | |
635 // the code cache to the page size. In particular, Solaris is moving to a larger | |
636 // default page size. | |
637 CodeCacheExpansionSize = round_to(CodeCacheExpansionSize, os::vm_page_size()); | |
638 InitialCodeCacheSize = round_to(InitialCodeCacheSize, os::vm_page_size()); | |
639 ReservedCodeCacheSize = round_to(ReservedCodeCacheSize, os::vm_page_size()); | |
640 if (!_heap->reserve(ReservedCodeCacheSize, InitialCodeCacheSize, CodeCacheSegmentSize)) { | |
641 vm_exit_during_initialization("Could not reserve enough space for code cache"); | |
642 } | |
643 | |
644 MemoryService::add_code_heap_memory_pool(_heap); | |
645 | |
646 // Initialize ICache flush mechanism | |
647 // This service is needed for os::register_code_area | |
648 icache_init(); | |
649 | |
650 // Give OS a chance to register generated code area. | |
651 // This is used on Windows 64 bit platforms to register | |
652 // Structured Exception Handlers for our generated code. | |
653 os::register_code_area(_heap->low_boundary(), _heap->high_boundary()); | |
654 } | |
655 | |
656 | |
657 void codeCache_init() { | |
658 CodeCache::initialize(); | |
659 } | |
660 | |
661 //------------------------------------------------------------------------------------------------ | |
662 | |
663 int CodeCache::number_of_nmethods_with_dependencies() { | |
664 return _number_of_nmethods_with_dependencies; | |
665 } | |
666 | |
667 void CodeCache::clear_inline_caches() { | |
668 assert_locked_or_safepoint(CodeCache_lock); | |
669 FOR_ALL_ALIVE_NMETHODS(nm) { | |
670 nm->clear_inline_caches(); | |
671 } | |
672 } | |
673 | |
674 #ifndef PRODUCT | |
675 // used to keep track of how much time is spent in mark_for_deoptimization | |
676 static elapsedTimer dependentCheckTime; | |
677 static int dependentCheckCount = 0; | |
678 #endif // PRODUCT | |
679 | |
680 | |
681 int CodeCache::mark_for_deoptimization(DepChange& changes) { | |
682 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
683 | |
684 #ifndef PRODUCT | |
685 dependentCheckTime.start(); | |
686 dependentCheckCount++; | |
687 #endif // PRODUCT | |
688 | |
689 int number_of_marked_CodeBlobs = 0; | |
690 | |
691 // search the hierarchy looking for nmethods which are affected by the loading of this class | |
692 | |
693 // then search the interfaces this class implements looking for nmethods | |
694 // which might be dependent of the fact that an interface only had one | |
695 // implementor. | |
696 | |
697 { No_Safepoint_Verifier nsv; | |
698 for (DepChange::ContextStream str(changes, nsv); str.next(); ) { | |
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699 Klass* d = str.klass(); |
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700 number_of_marked_CodeBlobs += InstanceKlass::cast(d)->mark_dependent_nmethods(changes); |
0 | 701 } |
702 } | |
703 | |
704 if (VerifyDependencies) { | |
705 // Turn off dependency tracing while actually testing deps. | |
706 NOT_PRODUCT( FlagSetting fs(TraceDependencies, false) ); | |
707 FOR_ALL_ALIVE_NMETHODS(nm) { | |
708 if (!nm->is_marked_for_deoptimization() && | |
709 nm->check_all_dependencies()) { | |
710 ResourceMark rm; | |
711 tty->print_cr("Should have been marked for deoptimization:"); | |
712 changes.print(); | |
713 nm->print(); | |
714 nm->print_dependencies(); | |
715 } | |
716 } | |
717 } | |
718 | |
719 #ifndef PRODUCT | |
720 dependentCheckTime.stop(); | |
721 #endif // PRODUCT | |
722 | |
723 return number_of_marked_CodeBlobs; | |
724 } | |
725 | |
726 | |
727 #ifdef HOTSWAP | |
728 int CodeCache::mark_for_evol_deoptimization(instanceKlassHandle dependee) { | |
729 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
730 int number_of_marked_CodeBlobs = 0; | |
731 | |
732 // Deoptimize all methods of the evolving class itself | |
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733 Array<Method*>* old_methods = dependee->methods(); |
0 | 734 for (int i = 0; i < old_methods->length(); i++) { |
735 ResourceMark rm; | |
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736 Method* old_method = old_methods->at(i); |
0 | 737 nmethod *nm = old_method->code(); |
738 if (nm != NULL) { | |
739 nm->mark_for_deoptimization(); | |
740 number_of_marked_CodeBlobs++; | |
741 } | |
742 } | |
743 | |
744 FOR_ALL_ALIVE_NMETHODS(nm) { | |
745 if (nm->is_marked_for_deoptimization()) { | |
746 // ...Already marked in the previous pass; don't count it again. | |
747 } else if (nm->is_evol_dependent_on(dependee())) { | |
748 ResourceMark rm; | |
749 nm->mark_for_deoptimization(); | |
750 number_of_marked_CodeBlobs++; | |
751 } else { | |
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752 // flush caches in case they refer to a redefined Method* |
0 | 753 nm->clear_inline_caches(); |
754 } | |
755 } | |
756 | |
757 return number_of_marked_CodeBlobs; | |
758 } | |
759 #endif // HOTSWAP | |
760 | |
761 | |
762 // Deoptimize all methods | |
763 void CodeCache::mark_all_nmethods_for_deoptimization() { | |
764 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
765 FOR_ALL_ALIVE_NMETHODS(nm) { | |
766 nm->mark_for_deoptimization(); | |
767 } | |
768 } | |
769 | |
770 | |
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771 int CodeCache::mark_for_deoptimization(Method* dependee) { |
0 | 772 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
773 int number_of_marked_CodeBlobs = 0; | |
774 | |
775 FOR_ALL_ALIVE_NMETHODS(nm) { | |
776 if (nm->is_dependent_on_method(dependee)) { | |
777 ResourceMark rm; | |
778 nm->mark_for_deoptimization(); | |
779 number_of_marked_CodeBlobs++; | |
780 } | |
781 } | |
782 | |
783 return number_of_marked_CodeBlobs; | |
784 } | |
785 | |
786 void CodeCache::make_marked_nmethods_zombies() { | |
787 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
788 FOR_ALL_ALIVE_NMETHODS(nm) { | |
789 if (nm->is_marked_for_deoptimization()) { | |
790 | |
791 // If the nmethod has already been made non-entrant and it can be converted | |
792 // then zombie it now. Otherwise make it non-entrant and it will eventually | |
793 // be zombied when it is no longer seen on the stack. Note that the nmethod | |
794 // might be "entrant" and not on the stack and so could be zombied immediately | |
795 // but we can't tell because we don't track it on stack until it becomes | |
796 // non-entrant. | |
797 | |
798 if (nm->is_not_entrant() && nm->can_not_entrant_be_converted()) { | |
799 nm->make_zombie(); | |
800 } else { | |
801 nm->make_not_entrant(); | |
802 } | |
803 } | |
804 } | |
805 } | |
806 | |
807 void CodeCache::make_marked_nmethods_not_entrant() { | |
808 assert_locked_or_safepoint(CodeCache_lock); | |
809 FOR_ALL_ALIVE_NMETHODS(nm) { | |
810 if (nm->is_marked_for_deoptimization()) { | |
811 nm->make_not_entrant(); | |
812 } | |
813 } | |
814 } | |
815 | |
816 void CodeCache::verify() { | |
817 _heap->verify(); | |
818 FOR_ALL_ALIVE_BLOBS(p) { | |
819 p->verify(); | |
820 } | |
821 } | |
822 | |
823 //------------------------------------------------------------------------------------------------ | |
824 // Non-product version | |
825 | |
826 #ifndef PRODUCT | |
827 | |
828 void CodeCache::verify_if_often() { | |
829 if (VerifyCodeCacheOften) { | |
830 _heap->verify(); | |
831 } | |
832 } | |
833 | |
989 | 834 void CodeCache::print_trace(const char* event, CodeBlob* cb, int size) { |
835 if (PrintCodeCache2) { // Need to add a new flag | |
836 ResourceMark rm; | |
837 if (size == 0) size = cb->size(); | |
838 tty->print_cr("CodeCache %s: addr: " INTPTR_FORMAT ", size: 0x%x", event, cb, size); | |
839 } | |
840 } | |
841 | |
0 | 842 void CodeCache::print_internals() { |
843 int nmethodCount = 0; | |
844 int runtimeStubCount = 0; | |
845 int adapterCount = 0; | |
846 int deoptimizationStubCount = 0; | |
847 int uncommonTrapStubCount = 0; | |
848 int bufferBlobCount = 0; | |
849 int total = 0; | |
850 int nmethodAlive = 0; | |
851 int nmethodNotEntrant = 0; | |
852 int nmethodZombie = 0; | |
853 int nmethodUnloaded = 0; | |
854 int nmethodJava = 0; | |
855 int nmethodNative = 0; | |
856 int maxCodeSize = 0; | |
857 ResourceMark rm; | |
858 | |
859 CodeBlob *cb; | |
860 for (cb = first(); cb != NULL; cb = next(cb)) { | |
861 total++; | |
862 if (cb->is_nmethod()) { | |
863 nmethod* nm = (nmethod*)cb; | |
864 | |
865 if (Verbose && nm->method() != NULL) { | |
866 ResourceMark rm; | |
867 char *method_name = nm->method()->name_and_sig_as_C_string(); | |
868 tty->print("%s", method_name); | |
869 if(nm->is_alive()) { tty->print_cr(" alive"); } | |
870 if(nm->is_not_entrant()) { tty->print_cr(" not-entrant"); } | |
871 if(nm->is_zombie()) { tty->print_cr(" zombie"); } | |
872 } | |
873 | |
874 nmethodCount++; | |
875 | |
876 if(nm->is_alive()) { nmethodAlive++; } | |
877 if(nm->is_not_entrant()) { nmethodNotEntrant++; } | |
878 if(nm->is_zombie()) { nmethodZombie++; } | |
879 if(nm->is_unloaded()) { nmethodUnloaded++; } | |
880 if(nm->is_native_method()) { nmethodNative++; } | |
881 | |
882 if(nm->method() != NULL && nm->is_java_method()) { | |
883 nmethodJava++; | |
1748 | 884 if (nm->insts_size() > maxCodeSize) { |
885 maxCodeSize = nm->insts_size(); | |
0 | 886 } |
887 } | |
888 } else if (cb->is_runtime_stub()) { | |
889 runtimeStubCount++; | |
890 } else if (cb->is_deoptimization_stub()) { | |
891 deoptimizationStubCount++; | |
892 } else if (cb->is_uncommon_trap_stub()) { | |
893 uncommonTrapStubCount++; | |
894 } else if (cb->is_adapter_blob()) { | |
895 adapterCount++; | |
896 } else if (cb->is_buffer_blob()) { | |
897 bufferBlobCount++; | |
898 } | |
899 } | |
900 | |
901 int bucketSize = 512; | |
902 int bucketLimit = maxCodeSize / bucketSize + 1; | |
6197 | 903 int *buckets = NEW_C_HEAP_ARRAY(int, bucketLimit, mtCode); |
0 | 904 memset(buckets,0,sizeof(int) * bucketLimit); |
905 | |
906 for (cb = first(); cb != NULL; cb = next(cb)) { | |
907 if (cb->is_nmethod()) { | |
908 nmethod* nm = (nmethod*)cb; | |
909 if(nm->is_java_method()) { | |
1748 | 910 buckets[nm->insts_size() / bucketSize]++; |
0 | 911 } |
912 } | |
913 } | |
914 tty->print_cr("Code Cache Entries (total of %d)",total); | |
915 tty->print_cr("-------------------------------------------------"); | |
916 tty->print_cr("nmethods: %d",nmethodCount); | |
917 tty->print_cr("\talive: %d",nmethodAlive); | |
918 tty->print_cr("\tnot_entrant: %d",nmethodNotEntrant); | |
919 tty->print_cr("\tzombie: %d",nmethodZombie); | |
920 tty->print_cr("\tunloaded: %d",nmethodUnloaded); | |
921 tty->print_cr("\tjava: %d",nmethodJava); | |
922 tty->print_cr("\tnative: %d",nmethodNative); | |
923 tty->print_cr("runtime_stubs: %d",runtimeStubCount); | |
924 tty->print_cr("adapters: %d",adapterCount); | |
925 tty->print_cr("buffer blobs: %d",bufferBlobCount); | |
926 tty->print_cr("deoptimization_stubs: %d",deoptimizationStubCount); | |
927 tty->print_cr("uncommon_traps: %d",uncommonTrapStubCount); | |
928 tty->print_cr("\nnmethod size distribution (non-zombie java)"); | |
929 tty->print_cr("-------------------------------------------------"); | |
930 | |
931 for(int i=0; i<bucketLimit; i++) { | |
932 if(buckets[i] != 0) { | |
933 tty->print("%d - %d bytes",i*bucketSize,(i+1)*bucketSize); | |
934 tty->fill_to(40); | |
935 tty->print_cr("%d",buckets[i]); | |
936 } | |
937 } | |
938 | |
6197 | 939 FREE_C_HEAP_ARRAY(int, buckets, mtCode); |
0 | 940 } |
941 | |
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942 #endif // !PRODUCT |
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943 |
0 | 944 void CodeCache::print() { |
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945 print_summary(tty); |
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946 |
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947 #ifndef PRODUCT |
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948 if (!Verbose) return; |
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949 |
0 | 950 CodeBlob_sizes live; |
951 CodeBlob_sizes dead; | |
952 | |
953 FOR_ALL_BLOBS(p) { | |
954 if (!p->is_alive()) { | |
955 dead.add(p); | |
956 } else { | |
957 live.add(p); | |
958 } | |
959 } | |
960 | |
961 tty->print_cr("CodeCache:"); | |
962 | |
963 tty->print_cr("nmethod dependency checking time %f", dependentCheckTime.seconds(), | |
964 dependentCheckTime.seconds() / dependentCheckCount); | |
965 | |
966 if (!live.is_empty()) { | |
967 live.print("live"); | |
968 } | |
969 if (!dead.is_empty()) { | |
970 dead.print("dead"); | |
971 } | |
972 | |
973 | |
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974 if (WizardMode) { |
0 | 975 // print the oop_map usage |
976 int code_size = 0; | |
977 int number_of_blobs = 0; | |
978 int number_of_oop_maps = 0; | |
979 int map_size = 0; | |
980 FOR_ALL_BLOBS(p) { | |
981 if (p->is_alive()) { | |
982 number_of_blobs++; | |
1748 | 983 code_size += p->code_size(); |
0 | 984 OopMapSet* set = p->oop_maps(); |
985 if (set != NULL) { | |
986 number_of_oop_maps += set->size(); | |
1748 | 987 map_size += set->heap_size(); |
0 | 988 } |
989 } | |
990 } | |
991 tty->print_cr("OopMaps"); | |
992 tty->print_cr(" #blobs = %d", number_of_blobs); | |
993 tty->print_cr(" code size = %d", code_size); | |
994 tty->print_cr(" #oop_maps = %d", number_of_oop_maps); | |
995 tty->print_cr(" map size = %d", map_size); | |
996 } | |
997 | |
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998 #endif // !PRODUCT |
0 | 999 } |
1000 | |
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1001 void CodeCache::print_summary(outputStream* st, bool detailed) { |
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1002 size_t total = (_heap->high_boundary() - _heap->low_boundary()); |
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1003 st->print_cr("CodeCache: size=" SIZE_FORMAT "Kb used=" SIZE_FORMAT |
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1004 "Kb max_used=" SIZE_FORMAT "Kb free=" SIZE_FORMAT "Kb", |
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1005 total/K, (total - unallocated_capacity())/K, |
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1006 maxCodeCacheUsed/K, unallocated_capacity()/K); |
1907 | 1007 |
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1008 if (detailed) { |
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1009 st->print_cr(" bounds [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT "]", |
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1010 _heap->low_boundary(), |
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1011 _heap->high(), |
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1012 _heap->high_boundary()); |
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1013 st->print_cr(" total_blobs=" UINT32_FORMAT " nmethods=" UINT32_FORMAT |
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1014 " adapters=" UINT32_FORMAT, |
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1015 nof_blobs(), nof_nmethods(), nof_adapters()); |
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1016 st->print_cr(" compilation: %s", CompileBroker::should_compile_new_jobs() ? |
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1017 "enabled" : Arguments::mode() == Arguments::_int ? |
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1018 "disabled (interpreter mode)" : |
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1019 "disabled (not enough contiguous free space left)"); |
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1020 } |
1907 | 1021 } |
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1022 |
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1023 void CodeCache::log_state(outputStream* st) { |
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1024 st->print(" total_blobs='" UINT32_FORMAT "' nmethods='" UINT32_FORMAT "'" |
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1025 " adapters='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'", |
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1026 nof_blobs(), nof_nmethods(), nof_adapters(), |
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1027 unallocated_capacity()); |
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1028 } |
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1029 |