Mercurial > hg > truffle
annotate src/share/vm/code/codeCache.cpp @ 10031:ebb32c4589f3
Force GC to process graal_installed_code references during marking (GRAAL-257)
| author | Christos Kotselidis <christos.kotselidis@oracle.com> |
|---|---|
| date | Tue, 11 Jun 2013 19:59:52 +0200 |
| parents | 9deda4d8e126 |
| children | 836a62f43af9 |
| rev | line source |
|---|---|
| 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 |
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306 #ifdef GRAAL |
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307 void CodeCache::alive_nmethods_do_graal_methods(OopClosure* closure) { |
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308 assert_locked_or_safepoint(CodeCache_lock); |
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309 FOR_ALL_ALIVE_NMETHODS(nm) { |
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310 nm->mark_graal_reference(closure); |
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311 } |
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312 } |
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313 #endif |
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314 |
| 0 | 315 int CodeCache::alignment_unit() { |
| 316 return (int)_heap->alignment_unit(); | |
| 317 } | |
| 318 | |
| 319 | |
| 320 int CodeCache::alignment_offset() { | |
| 321 return (int)_heap->alignment_offset(); | |
| 322 } | |
| 323 | |
| 324 | |
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325 // Mark nmethods for unloading if they contain otherwise unreachable |
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326 // oops. |
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327 void CodeCache::do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred) { |
| 0 | 328 assert_locked_or_safepoint(CodeCache_lock); |
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329 FOR_ALL_ALIVE_NMETHODS(nm) { |
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330 nm->do_unloading(is_alive, unloading_occurred); |
| 0 | 331 } |
| 332 } | |
| 333 | |
| 989 | 334 void CodeCache::blobs_do(CodeBlobClosure* f) { |
| 0 | 335 assert_locked_or_safepoint(CodeCache_lock); |
| 336 FOR_ALL_ALIVE_BLOBS(cb) { | |
| 989 | 337 f->do_code_blob(cb); |
| 338 | |
| 339 #ifdef ASSERT | |
| 340 if (cb->is_nmethod()) | |
| 341 ((nmethod*)cb)->verify_scavenge_root_oops(); | |
| 342 #endif //ASSERT | |
| 0 | 343 } |
| 344 } | |
| 345 | |
| 989 | 346 // Walk the list of methods which might contain non-perm oops. |
| 347 void CodeCache::scavenge_root_nmethods_do(CodeBlobClosure* f) { | |
| 348 assert_locked_or_safepoint(CodeCache_lock); | |
| 349 debug_only(mark_scavenge_root_nmethods()); | |
| 350 | |
| 351 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
| 352 debug_only(cur->clear_scavenge_root_marked()); | |
| 353 assert(cur->scavenge_root_not_marked(), ""); | |
| 354 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
| 355 | |
| 356 bool is_live = (!cur->is_zombie() && !cur->is_unloaded()); | |
| 357 #ifndef PRODUCT | |
| 358 if (TraceScavenge) { | |
| 359 cur->print_on(tty, is_live ? "scavenge root" : "dead scavenge root"); tty->cr(); | |
| 360 } | |
| 361 #endif //PRODUCT | |
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362 if (is_live) { |
| 989 | 363 // Perform cur->oops_do(f), maybe just once per nmethod. |
| 364 f->do_code_blob(cur); | |
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365 } |
| 989 | 366 } |
| 367 | |
| 368 // Check for stray marks. | |
| 369 debug_only(verify_perm_nmethods(NULL)); | |
| 370 } | |
| 371 | |
| 372 void CodeCache::add_scavenge_root_nmethod(nmethod* nm) { | |
| 373 assert_locked_or_safepoint(CodeCache_lock); | |
| 374 nm->set_on_scavenge_root_list(); | |
| 375 nm->set_scavenge_root_link(_scavenge_root_nmethods); | |
| 376 set_scavenge_root_nmethods(nm); | |
| 377 print_trace("add_scavenge_root", nm); | |
| 378 } | |
| 379 | |
| 380 void CodeCache::drop_scavenge_root_nmethod(nmethod* nm) { | |
| 381 assert_locked_or_safepoint(CodeCache_lock); | |
| 382 print_trace("drop_scavenge_root", nm); | |
| 383 nmethod* last = NULL; | |
| 384 nmethod* cur = scavenge_root_nmethods(); | |
| 385 while (cur != NULL) { | |
| 386 nmethod* next = cur->scavenge_root_link(); | |
| 387 if (cur == nm) { | |
| 388 if (last != NULL) | |
| 389 last->set_scavenge_root_link(next); | |
| 390 else set_scavenge_root_nmethods(next); | |
| 391 nm->set_scavenge_root_link(NULL); | |
| 392 nm->clear_on_scavenge_root_list(); | |
| 393 return; | |
| 394 } | |
| 395 last = cur; | |
| 396 cur = next; | |
| 397 } | |
| 398 assert(false, "should have been on list"); | |
| 399 } | |
| 400 | |
| 401 void CodeCache::prune_scavenge_root_nmethods() { | |
| 402 assert_locked_or_safepoint(CodeCache_lock); | |
| 403 debug_only(mark_scavenge_root_nmethods()); | |
| 404 | |
| 405 nmethod* last = NULL; | |
| 406 nmethod* cur = scavenge_root_nmethods(); | |
| 407 while (cur != NULL) { | |
| 408 nmethod* next = cur->scavenge_root_link(); | |
| 409 debug_only(cur->clear_scavenge_root_marked()); | |
| 410 assert(cur->scavenge_root_not_marked(), ""); | |
| 411 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
| 412 | |
| 413 if (!cur->is_zombie() && !cur->is_unloaded() | |
| 414 && cur->detect_scavenge_root_oops()) { | |
| 415 // Keep it. Advance 'last' to prevent deletion. | |
| 416 last = cur; | |
| 417 } else { | |
| 418 // Prune it from the list, so we don't have to look at it any more. | |
| 419 print_trace("prune_scavenge_root", cur); | |
| 420 cur->set_scavenge_root_link(NULL); | |
| 421 cur->clear_on_scavenge_root_list(); | |
| 422 if (last != NULL) | |
| 423 last->set_scavenge_root_link(next); | |
| 424 else set_scavenge_root_nmethods(next); | |
| 425 } | |
| 426 cur = next; | |
| 427 } | |
| 428 | |
| 429 // Check for stray marks. | |
| 430 debug_only(verify_perm_nmethods(NULL)); | |
| 431 } | |
| 432 | |
| 433 #ifndef PRODUCT | |
| 434 void CodeCache::asserted_non_scavengable_nmethods_do(CodeBlobClosure* f) { | |
| 435 // While we are here, verify the integrity of the list. | |
| 436 mark_scavenge_root_nmethods(); | |
| 437 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
| 438 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
| 439 cur->clear_scavenge_root_marked(); | |
| 440 } | |
| 441 verify_perm_nmethods(f); | |
| 442 } | |
| 443 | |
| 444 // Temporarily mark nmethods that are claimed to be on the non-perm list. | |
| 445 void CodeCache::mark_scavenge_root_nmethods() { | |
| 446 FOR_ALL_ALIVE_BLOBS(cb) { | |
| 447 if (cb->is_nmethod()) { | |
| 448 nmethod *nm = (nmethod*)cb; | |
| 449 assert(nm->scavenge_root_not_marked(), "clean state"); | |
| 450 if (nm->on_scavenge_root_list()) | |
| 451 nm->set_scavenge_root_marked(); | |
| 452 } | |
| 453 } | |
| 454 } | |
| 455 | |
| 456 // If the closure is given, run it on the unlisted nmethods. | |
| 457 // Also make sure that the effects of mark_scavenge_root_nmethods is gone. | |
| 458 void CodeCache::verify_perm_nmethods(CodeBlobClosure* f_or_null) { | |
| 459 FOR_ALL_ALIVE_BLOBS(cb) { | |
| 460 bool call_f = (f_or_null != NULL); | |
| 461 if (cb->is_nmethod()) { | |
| 462 nmethod *nm = (nmethod*)cb; | |
| 463 assert(nm->scavenge_root_not_marked(), "must be already processed"); | |
| 464 if (nm->on_scavenge_root_list()) | |
| 465 call_f = false; // don't show this one to the client | |
| 466 nm->verify_scavenge_root_oops(); | |
| 467 } else { | |
| 468 call_f = false; // not an nmethod | |
| 469 } | |
| 470 if (call_f) f_or_null->do_code_blob(cb); | |
| 471 } | |
| 472 } | |
| 473 #endif //PRODUCT | |
| 474 | |
| 1202 | 475 |
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476 nmethod* CodeCache::find_and_remove_saved_code(Method* m) { |
| 1202 | 477 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| 478 nmethod* saved = _saved_nmethods; | |
| 479 nmethod* prev = NULL; | |
| 480 while (saved != NULL) { | |
| 481 if (saved->is_in_use() && saved->method() == m) { | |
| 482 if (prev != NULL) { | |
| 483 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
| 484 } else { | |
| 485 _saved_nmethods = saved->saved_nmethod_link(); | |
| 486 } | |
| 487 assert(saved->is_speculatively_disconnected(), "shouldn't call for other nmethods"); | |
| 488 saved->set_speculatively_disconnected(false); | |
| 489 saved->set_saved_nmethod_link(NULL); | |
| 490 if (PrintMethodFlushing) { | |
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491 saved->print_on(tty, " ### nmethod is reconnected\n"); |
| 1202 | 492 } |
| 493 if (LogCompilation && (xtty != NULL)) { | |
| 494 ttyLocker ttyl; | |
| 495 xtty->begin_elem("nmethod_reconnected compile_id='%3d'", saved->compile_id()); | |
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496 xtty->method(m); |
| 1202 | 497 xtty->stamp(); |
| 498 xtty->end_elem(); | |
| 499 } | |
| 500 return saved; | |
| 501 } | |
| 502 prev = saved; | |
| 503 saved = saved->saved_nmethod_link(); | |
| 504 } | |
| 505 return NULL; | |
| 506 } | |
| 507 | |
| 508 void CodeCache::remove_saved_code(nmethod* nm) { | |
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509 // For conc swpr this will be called with CodeCache_lock taken by caller |
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510 assert_locked_or_safepoint(CodeCache_lock); |
| 1202 | 511 assert(nm->is_speculatively_disconnected(), "shouldn't call for other nmethods"); |
| 512 nmethod* saved = _saved_nmethods; | |
| 513 nmethod* prev = NULL; | |
| 514 while (saved != NULL) { | |
| 515 if (saved == nm) { | |
| 516 if (prev != NULL) { | |
| 517 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
| 518 } else { | |
| 519 _saved_nmethods = saved->saved_nmethod_link(); | |
| 520 } | |
| 521 if (LogCompilation && (xtty != NULL)) { | |
| 522 ttyLocker ttyl; | |
| 523 xtty->begin_elem("nmethod_removed compile_id='%3d'", nm->compile_id()); | |
| 524 xtty->stamp(); | |
| 525 xtty->end_elem(); | |
| 526 } | |
| 527 return; | |
| 528 } | |
| 529 prev = saved; | |
| 530 saved = saved->saved_nmethod_link(); | |
| 531 } | |
| 532 ShouldNotReachHere(); | |
| 533 } | |
| 534 | |
| 535 void CodeCache::speculatively_disconnect(nmethod* nm) { | |
| 536 assert_locked_or_safepoint(CodeCache_lock); | |
| 537 assert(nm->is_in_use() && !nm->is_speculatively_disconnected(), "should only disconnect live nmethods"); | |
| 538 nm->set_saved_nmethod_link(_saved_nmethods); | |
| 539 _saved_nmethods = nm; | |
| 540 if (PrintMethodFlushing) { | |
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541 nm->print_on(tty, " ### nmethod is speculatively disconnected\n"); |
| 1202 | 542 } |
| 543 if (LogCompilation && (xtty != NULL)) { | |
| 544 ttyLocker ttyl; | |
| 545 xtty->begin_elem("nmethod_disconnected compile_id='%3d'", nm->compile_id()); | |
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546 xtty->method(nm->method()); |
| 1202 | 547 xtty->stamp(); |
| 548 xtty->end_elem(); | |
| 549 } | |
| 550 nm->method()->clear_code(); | |
| 551 nm->set_speculatively_disconnected(true); | |
| 552 } | |
| 553 | |
| 554 | |
| 0 | 555 void CodeCache::gc_prologue() { |
| 989 | 556 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_epilogue must be called"); |
| 0 | 557 } |
| 558 | |
| 559 | |
| 560 void CodeCache::gc_epilogue() { | |
| 561 assert_locked_or_safepoint(CodeCache_lock); | |
| 562 FOR_ALL_ALIVE_BLOBS(cb) { | |
| 563 if (cb->is_nmethod()) { | |
| 564 nmethod *nm = (nmethod*)cb; | |
| 565 assert(!nm->is_unloaded(), "Tautology"); | |
| 566 if (needs_cache_clean()) { | |
| 567 nm->cleanup_inline_caches(); | |
| 568 } | |
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569 DEBUG_ONLY(nm->verify()); |
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570 nm->fix_oop_relocations(); |
| 0 | 571 } |
| 572 } | |
| 573 set_needs_cache_clean(false); | |
| 989 | 574 prune_scavenge_root_nmethods(); |
| 575 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); | |
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576 |
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577 #ifdef ASSERT |
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578 // make sure that we aren't leaking icholders |
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579 int count = 0; |
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580 FOR_ALL_BLOBS(cb) { |
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581 if (cb->is_nmethod()) { |
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582 RelocIterator iter((nmethod*)cb); |
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583 while(iter.next()) { |
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584 if (iter.type() == relocInfo::virtual_call_type) { |
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585 if (CompiledIC::is_icholder_call_site(iter.virtual_call_reloc())) { |
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586 CompiledIC *ic = CompiledIC_at(iter.reloc()); |
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587 if (TraceCompiledIC) { |
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588 tty->print("noticed icholder " INTPTR_FORMAT " ", ic->cached_icholder()); |
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589 ic->print(); |
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590 } |
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591 assert(ic->cached_icholder() != NULL, "must be non-NULL"); |
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592 count++; |
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593 } |
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594 } |
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595 } |
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596 } |
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597 } |
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598 |
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599 assert(count + InlineCacheBuffer::pending_icholder_count() + CompiledICHolder::live_not_claimed_count() == |
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600 CompiledICHolder::live_count(), "must agree"); |
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601 #endif |
| 0 | 602 } |
| 603 | |
| 604 | |
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605 void CodeCache::verify_oops() { |
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606 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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607 VerifyOopClosure voc; |
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608 FOR_ALL_ALIVE_BLOBS(cb) { |
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609 if (cb->is_nmethod()) { |
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610 nmethod *nm = (nmethod*)cb; |
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611 nm->oops_do(&voc); |
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612 nm->verify_oop_relocations(); |
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613 } |
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614 } |
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615 } |
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616 |
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617 |
| 0 | 618 address CodeCache::first_address() { |
| 619 assert_locked_or_safepoint(CodeCache_lock); | |
| 620 return (address)_heap->begin(); | |
| 621 } | |
| 622 | |
| 623 | |
| 624 address CodeCache::last_address() { | |
| 625 assert_locked_or_safepoint(CodeCache_lock); | |
| 626 return (address)_heap->end(); | |
| 627 } | |
| 628 | |
| 629 | |
| 630 void icache_init(); | |
| 631 | |
| 632 void CodeCache::initialize() { | |
| 633 assert(CodeCacheSegmentSize >= (uintx)CodeEntryAlignment, "CodeCacheSegmentSize must be large enough to align entry points"); | |
| 634 #ifdef COMPILER2 | |
| 635 assert(CodeCacheSegmentSize >= (uintx)OptoLoopAlignment, "CodeCacheSegmentSize must be large enough to align inner loops"); | |
| 636 #endif | |
| 637 assert(CodeCacheSegmentSize >= sizeof(jdouble), "CodeCacheSegmentSize must be large enough to align constants"); | |
| 638 // This was originally just a check of the alignment, causing failure, instead, round | |
| 639 // the code cache to the page size. In particular, Solaris is moving to a larger | |
| 640 // default page size. | |
| 641 CodeCacheExpansionSize = round_to(CodeCacheExpansionSize, os::vm_page_size()); | |
| 642 InitialCodeCacheSize = round_to(InitialCodeCacheSize, os::vm_page_size()); | |
| 643 ReservedCodeCacheSize = round_to(ReservedCodeCacheSize, os::vm_page_size()); | |
| 644 if (!_heap->reserve(ReservedCodeCacheSize, InitialCodeCacheSize, CodeCacheSegmentSize)) { | |
| 645 vm_exit_during_initialization("Could not reserve enough space for code cache"); | |
| 646 } | |
| 647 | |
| 648 MemoryService::add_code_heap_memory_pool(_heap); | |
| 649 | |
| 650 // Initialize ICache flush mechanism | |
| 651 // This service is needed for os::register_code_area | |
| 652 icache_init(); | |
| 653 | |
| 654 // Give OS a chance to register generated code area. | |
| 655 // This is used on Windows 64 bit platforms to register | |
| 656 // Structured Exception Handlers for our generated code. | |
| 657 os::register_code_area(_heap->low_boundary(), _heap->high_boundary()); | |
| 658 } | |
| 659 | |
| 660 | |
| 661 void codeCache_init() { | |
| 662 CodeCache::initialize(); | |
| 663 } | |
| 664 | |
| 665 //------------------------------------------------------------------------------------------------ | |
| 666 | |
| 667 int CodeCache::number_of_nmethods_with_dependencies() { | |
| 668 return _number_of_nmethods_with_dependencies; | |
| 669 } | |
| 670 | |
| 671 void CodeCache::clear_inline_caches() { | |
| 672 assert_locked_or_safepoint(CodeCache_lock); | |
| 673 FOR_ALL_ALIVE_NMETHODS(nm) { | |
| 674 nm->clear_inline_caches(); | |
| 675 } | |
| 676 } | |
| 677 | |
| 678 #ifndef PRODUCT | |
| 679 // used to keep track of how much time is spent in mark_for_deoptimization | |
| 680 static elapsedTimer dependentCheckTime; | |
| 681 static int dependentCheckCount = 0; | |
| 682 #endif // PRODUCT | |
| 683 | |
| 684 | |
| 685 int CodeCache::mark_for_deoptimization(DepChange& changes) { | |
| 686 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 687 | |
| 688 #ifndef PRODUCT | |
| 689 dependentCheckTime.start(); | |
| 690 dependentCheckCount++; | |
| 691 #endif // PRODUCT | |
| 692 | |
| 693 int number_of_marked_CodeBlobs = 0; | |
| 694 | |
| 695 // search the hierarchy looking for nmethods which are affected by the loading of this class | |
| 696 | |
| 697 // then search the interfaces this class implements looking for nmethods | |
| 698 // which might be dependent of the fact that an interface only had one | |
| 699 // implementor. | |
| 700 | |
| 701 { No_Safepoint_Verifier nsv; | |
| 702 for (DepChange::ContextStream str(changes, nsv); str.next(); ) { | |
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703 Klass* d = str.klass(); |
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704 number_of_marked_CodeBlobs += InstanceKlass::cast(d)->mark_dependent_nmethods(changes); |
| 0 | 705 } |
| 706 } | |
| 707 | |
| 708 if (VerifyDependencies) { | |
| 709 // Turn off dependency tracing while actually testing deps. | |
| 710 NOT_PRODUCT( FlagSetting fs(TraceDependencies, false) ); | |
| 711 FOR_ALL_ALIVE_NMETHODS(nm) { | |
| 712 if (!nm->is_marked_for_deoptimization() && | |
| 713 nm->check_all_dependencies()) { | |
| 714 ResourceMark rm; | |
| 715 tty->print_cr("Should have been marked for deoptimization:"); | |
| 716 changes.print(); | |
| 717 nm->print(); | |
| 718 nm->print_dependencies(); | |
| 719 } | |
| 720 } | |
| 721 } | |
| 722 | |
| 723 #ifndef PRODUCT | |
| 724 dependentCheckTime.stop(); | |
| 725 #endif // PRODUCT | |
| 726 | |
| 727 return number_of_marked_CodeBlobs; | |
| 728 } | |
| 729 | |
| 730 | |
| 731 #ifdef HOTSWAP | |
| 732 int CodeCache::mark_for_evol_deoptimization(instanceKlassHandle dependee) { | |
| 733 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 734 int number_of_marked_CodeBlobs = 0; | |
| 735 | |
| 736 // Deoptimize all methods of the evolving class itself | |
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737 Array<Method*>* old_methods = dependee->methods(); |
| 0 | 738 for (int i = 0; i < old_methods->length(); i++) { |
| 739 ResourceMark rm; | |
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740 Method* old_method = old_methods->at(i); |
| 0 | 741 nmethod *nm = old_method->code(); |
| 742 if (nm != NULL) { | |
| 743 nm->mark_for_deoptimization(); | |
| 744 number_of_marked_CodeBlobs++; | |
| 745 } | |
| 746 } | |
| 747 | |
| 748 FOR_ALL_ALIVE_NMETHODS(nm) { | |
| 749 if (nm->is_marked_for_deoptimization()) { | |
| 750 // ...Already marked in the previous pass; don't count it again. | |
| 751 } else if (nm->is_evol_dependent_on(dependee())) { | |
| 752 ResourceMark rm; | |
| 753 nm->mark_for_deoptimization(); | |
| 754 number_of_marked_CodeBlobs++; | |
| 755 } else { | |
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756 // flush caches in case they refer to a redefined Method* |
| 0 | 757 nm->clear_inline_caches(); |
| 758 } | |
| 759 } | |
| 760 | |
| 761 return number_of_marked_CodeBlobs; | |
| 762 } | |
| 763 #endif // HOTSWAP | |
| 764 | |
| 765 | |
| 766 // Deoptimize all methods | |
| 767 void CodeCache::mark_all_nmethods_for_deoptimization() { | |
| 768 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 769 FOR_ALL_ALIVE_NMETHODS(nm) { | |
| 770 nm->mark_for_deoptimization(); | |
| 771 } | |
| 772 } | |
| 773 | |
| 774 | |
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775 int CodeCache::mark_for_deoptimization(Method* dependee) { |
| 0 | 776 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| 777 int number_of_marked_CodeBlobs = 0; | |
| 778 | |
| 779 FOR_ALL_ALIVE_NMETHODS(nm) { | |
| 780 if (nm->is_dependent_on_method(dependee)) { | |
| 781 ResourceMark rm; | |
| 782 nm->mark_for_deoptimization(); | |
| 783 number_of_marked_CodeBlobs++; | |
| 784 } | |
| 785 } | |
| 786 | |
| 787 return number_of_marked_CodeBlobs; | |
| 788 } | |
| 789 | |
| 790 void CodeCache::make_marked_nmethods_zombies() { | |
| 791 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
| 792 FOR_ALL_ALIVE_NMETHODS(nm) { | |
| 793 if (nm->is_marked_for_deoptimization()) { | |
| 794 | |
| 795 // If the nmethod has already been made non-entrant and it can be converted | |
| 796 // then zombie it now. Otherwise make it non-entrant and it will eventually | |
| 797 // be zombied when it is no longer seen on the stack. Note that the nmethod | |
| 798 // might be "entrant" and not on the stack and so could be zombied immediately | |
| 799 // but we can't tell because we don't track it on stack until it becomes | |
| 800 // non-entrant. | |
| 801 | |
| 802 if (nm->is_not_entrant() && nm->can_not_entrant_be_converted()) { | |
| 803 nm->make_zombie(); | |
| 804 } else { | |
| 805 nm->make_not_entrant(); | |
| 806 } | |
| 807 } | |
| 808 } | |
| 809 } | |
| 810 | |
| 811 void CodeCache::make_marked_nmethods_not_entrant() { | |
| 812 assert_locked_or_safepoint(CodeCache_lock); | |
| 813 FOR_ALL_ALIVE_NMETHODS(nm) { | |
| 814 if (nm->is_marked_for_deoptimization()) { | |
| 815 nm->make_not_entrant(); | |
| 816 } | |
| 817 } | |
| 818 } | |
| 819 | |
| 820 void CodeCache::verify() { | |
| 821 _heap->verify(); | |
| 822 FOR_ALL_ALIVE_BLOBS(p) { | |
| 823 p->verify(); | |
| 824 } | |
| 825 } | |
| 826 | |
| 827 //------------------------------------------------------------------------------------------------ | |
| 828 // Non-product version | |
| 829 | |
| 830 #ifndef PRODUCT | |
| 831 | |
| 832 void CodeCache::verify_if_often() { | |
| 833 if (VerifyCodeCacheOften) { | |
| 834 _heap->verify(); | |
| 835 } | |
| 836 } | |
| 837 | |
| 989 | 838 void CodeCache::print_trace(const char* event, CodeBlob* cb, int size) { |
| 839 if (PrintCodeCache2) { // Need to add a new flag | |
| 840 ResourceMark rm; | |
| 841 if (size == 0) size = cb->size(); | |
| 842 tty->print_cr("CodeCache %s: addr: " INTPTR_FORMAT ", size: 0x%x", event, cb, size); | |
| 843 } | |
| 844 } | |
| 845 | |
| 0 | 846 void CodeCache::print_internals() { |
| 847 int nmethodCount = 0; | |
| 848 int runtimeStubCount = 0; | |
| 849 int adapterCount = 0; | |
| 850 int deoptimizationStubCount = 0; | |
| 851 int uncommonTrapStubCount = 0; | |
| 852 int bufferBlobCount = 0; | |
| 853 int total = 0; | |
| 854 int nmethodAlive = 0; | |
| 855 int nmethodNotEntrant = 0; | |
| 856 int nmethodZombie = 0; | |
| 857 int nmethodUnloaded = 0; | |
| 858 int nmethodJava = 0; | |
| 859 int nmethodNative = 0; | |
| 860 int maxCodeSize = 0; | |
| 861 ResourceMark rm; | |
| 862 | |
| 863 CodeBlob *cb; | |
| 864 for (cb = first(); cb != NULL; cb = next(cb)) { | |
| 865 total++; | |
| 866 if (cb->is_nmethod()) { | |
| 867 nmethod* nm = (nmethod*)cb; | |
| 868 | |
| 869 if (Verbose && nm->method() != NULL) { | |
| 870 ResourceMark rm; | |
| 871 char *method_name = nm->method()->name_and_sig_as_C_string(); | |
| 872 tty->print("%s", method_name); | |
| 873 if(nm->is_alive()) { tty->print_cr(" alive"); } | |
| 874 if(nm->is_not_entrant()) { tty->print_cr(" not-entrant"); } | |
| 875 if(nm->is_zombie()) { tty->print_cr(" zombie"); } | |
| 876 } | |
| 877 | |
| 878 nmethodCount++; | |
| 879 | |
| 880 if(nm->is_alive()) { nmethodAlive++; } | |
| 881 if(nm->is_not_entrant()) { nmethodNotEntrant++; } | |
| 882 if(nm->is_zombie()) { nmethodZombie++; } | |
| 883 if(nm->is_unloaded()) { nmethodUnloaded++; } | |
| 884 if(nm->is_native_method()) { nmethodNative++; } | |
| 885 | |
| 886 if(nm->method() != NULL && nm->is_java_method()) { | |
| 887 nmethodJava++; | |
| 1748 | 888 if (nm->insts_size() > maxCodeSize) { |
| 889 maxCodeSize = nm->insts_size(); | |
| 0 | 890 } |
| 891 } | |
| 892 } else if (cb->is_runtime_stub()) { | |
| 893 runtimeStubCount++; | |
| 894 } else if (cb->is_deoptimization_stub()) { | |
| 895 deoptimizationStubCount++; | |
| 896 } else if (cb->is_uncommon_trap_stub()) { | |
| 897 uncommonTrapStubCount++; | |
| 898 } else if (cb->is_adapter_blob()) { | |
| 899 adapterCount++; | |
| 900 } else if (cb->is_buffer_blob()) { | |
| 901 bufferBlobCount++; | |
| 902 } | |
| 903 } | |
| 904 | |
| 905 int bucketSize = 512; | |
| 906 int bucketLimit = maxCodeSize / bucketSize + 1; | |
| 6197 | 907 int *buckets = NEW_C_HEAP_ARRAY(int, bucketLimit, mtCode); |
| 0 | 908 memset(buckets,0,sizeof(int) * bucketLimit); |
| 909 | |
| 910 for (cb = first(); cb != NULL; cb = next(cb)) { | |
| 911 if (cb->is_nmethod()) { | |
| 912 nmethod* nm = (nmethod*)cb; | |
| 913 if(nm->is_java_method()) { | |
| 1748 | 914 buckets[nm->insts_size() / bucketSize]++; |
| 0 | 915 } |
| 916 } | |
| 917 } | |
| 918 tty->print_cr("Code Cache Entries (total of %d)",total); | |
| 919 tty->print_cr("-------------------------------------------------"); | |
| 920 tty->print_cr("nmethods: %d",nmethodCount); | |
| 921 tty->print_cr("\talive: %d",nmethodAlive); | |
| 922 tty->print_cr("\tnot_entrant: %d",nmethodNotEntrant); | |
| 923 tty->print_cr("\tzombie: %d",nmethodZombie); | |
| 924 tty->print_cr("\tunloaded: %d",nmethodUnloaded); | |
| 925 tty->print_cr("\tjava: %d",nmethodJava); | |
| 926 tty->print_cr("\tnative: %d",nmethodNative); | |
| 927 tty->print_cr("runtime_stubs: %d",runtimeStubCount); | |
| 928 tty->print_cr("adapters: %d",adapterCount); | |
| 929 tty->print_cr("buffer blobs: %d",bufferBlobCount); | |
| 930 tty->print_cr("deoptimization_stubs: %d",deoptimizationStubCount); | |
| 931 tty->print_cr("uncommon_traps: %d",uncommonTrapStubCount); | |
| 932 tty->print_cr("\nnmethod size distribution (non-zombie java)"); | |
| 933 tty->print_cr("-------------------------------------------------"); | |
| 934 | |
| 935 for(int i=0; i<bucketLimit; i++) { | |
| 936 if(buckets[i] != 0) { | |
| 937 tty->print("%d - %d bytes",i*bucketSize,(i+1)*bucketSize); | |
| 938 tty->fill_to(40); | |
| 939 tty->print_cr("%d",buckets[i]); | |
| 940 } | |
| 941 } | |
| 942 | |
| 6197 | 943 FREE_C_HEAP_ARRAY(int, buckets, mtCode); |
| 0 | 944 } |
| 945 | |
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946 #endif // !PRODUCT |
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947 |
| 0 | 948 void CodeCache::print() { |
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949 print_summary(tty); |
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950 |
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951 #ifndef PRODUCT |
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952 if (!Verbose) return; |
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953 |
| 0 | 954 CodeBlob_sizes live; |
| 955 CodeBlob_sizes dead; | |
| 956 | |
| 957 FOR_ALL_BLOBS(p) { | |
| 958 if (!p->is_alive()) { | |
| 959 dead.add(p); | |
| 960 } else { | |
| 961 live.add(p); | |
| 962 } | |
| 963 } | |
| 964 | |
| 965 tty->print_cr("CodeCache:"); | |
| 966 | |
| 967 tty->print_cr("nmethod dependency checking time %f", dependentCheckTime.seconds(), | |
| 968 dependentCheckTime.seconds() / dependentCheckCount); | |
| 969 | |
| 970 if (!live.is_empty()) { | |
| 971 live.print("live"); | |
| 972 } | |
| 973 if (!dead.is_empty()) { | |
| 974 dead.print("dead"); | |
| 975 } | |
| 976 | |
| 977 | |
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978 if (WizardMode) { |
| 0 | 979 // print the oop_map usage |
| 980 int code_size = 0; | |
| 981 int number_of_blobs = 0; | |
| 982 int number_of_oop_maps = 0; | |
| 983 int map_size = 0; | |
| 984 FOR_ALL_BLOBS(p) { | |
| 985 if (p->is_alive()) { | |
| 986 number_of_blobs++; | |
| 1748 | 987 code_size += p->code_size(); |
| 0 | 988 OopMapSet* set = p->oop_maps(); |
| 989 if (set != NULL) { | |
| 990 number_of_oop_maps += set->size(); | |
| 1748 | 991 map_size += set->heap_size(); |
| 0 | 992 } |
| 993 } | |
| 994 } | |
| 995 tty->print_cr("OopMaps"); | |
| 996 tty->print_cr(" #blobs = %d", number_of_blobs); | |
| 997 tty->print_cr(" code size = %d", code_size); | |
| 998 tty->print_cr(" #oop_maps = %d", number_of_oop_maps); | |
| 999 tty->print_cr(" map size = %d", map_size); | |
| 1000 } | |
| 1001 | |
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1002 #endif // !PRODUCT |
| 0 | 1003 } |
| 1004 | |
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1005 void CodeCache::print_summary(outputStream* st, bool detailed) { |
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1006 size_t total = (_heap->high_boundary() - _heap->low_boundary()); |
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1007 st->print_cr("CodeCache: size=" SIZE_FORMAT "Kb used=" SIZE_FORMAT |
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1008 "Kb max_used=" SIZE_FORMAT "Kb free=" SIZE_FORMAT |
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1009 "Kb max_free_chunk=" SIZE_FORMAT "Kb", |
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1010 total/K, (total - unallocated_capacity())/K, |
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1011 maxCodeCacheUsed/K, unallocated_capacity()/K, largest_free_block()/K); |
| 1907 | 1012 |
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1013 if (detailed) { |
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1014 st->print_cr(" bounds [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT "]", |
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1015 _heap->low_boundary(), |
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1016 _heap->high(), |
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1017 _heap->high_boundary()); |
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1018 st->print_cr(" total_blobs=" UINT32_FORMAT " nmethods=" UINT32_FORMAT |
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1019 " adapters=" UINT32_FORMAT, |
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1020 nof_blobs(), nof_nmethods(), nof_adapters()); |
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1021 st->print_cr(" compilation: %s", CompileBroker::should_compile_new_jobs() ? |
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1022 "enabled" : Arguments::mode() == Arguments::_int ? |
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1023 "disabled (interpreter mode)" : |
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1024 "disabled (not enough contiguous free space left)"); |
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1025 } |
| 1907 | 1026 } |
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1027 |
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1028 void CodeCache::log_state(outputStream* st) { |
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1029 st->print(" total_blobs='" UINT32_FORMAT "' nmethods='" UINT32_FORMAT "'" |
|
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1030 " adapters='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'" |
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1031 " largest_free_block='" SIZE_FORMAT "'", |
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1032 nof_blobs(), nof_nmethods(), nof_adapters(), |
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1033 unallocated_capacity(), largest_free_block()); |
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1034 } |
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2457
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1035 |
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1036 size_t CodeCache::largest_free_block() { |
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1037 // This is called both with and without CodeCache_lock held so |
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1038 // handle both cases. |
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1039 if (CodeCache_lock->owned_by_self()) { |
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1040 return _heap->largest_free_block(); |
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1041 } else { |
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1042 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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1043 return _heap->largest_free_block(); |
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1044 } |
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1045 } |