Mercurial > hg > truffle
annotate src/share/vm/code/codeCache.cpp @ 20804:7848fc12602b
Merge with jdk8u40-b25
| author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
|---|---|
| date | Tue, 07 Apr 2015 14:58:49 +0200 |
| parents | 52b4284cb496 aff6ccb506cb |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "code/codeBlob.hpp" | |
| 27 #include "code/codeCache.hpp" | |
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28 #include "code/compiledIC.hpp" |
| 1972 | 29 #include "code/dependencies.hpp" |
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30 #include "code/icBuffer.hpp" |
| 1972 | 31 #include "code/nmethod.hpp" |
| 32 #include "code/pcDesc.hpp" | |
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33 #include "compiler/compileBroker.hpp" |
| 1972 | 34 #include "gc_implementation/shared/markSweep.hpp" |
| 35 #include "memory/allocation.inline.hpp" | |
| 36 #include "memory/gcLocker.hpp" | |
| 37 #include "memory/iterator.hpp" | |
| 38 #include "memory/resourceArea.hpp" | |
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39 #include "oops/method.hpp" |
| 1972 | 40 #include "oops/objArrayOop.hpp" |
| 41 #include "oops/oop.inline.hpp" | |
| 42 #include "runtime/handles.inline.hpp" | |
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43 #include "runtime/arguments.hpp" |
| 1972 | 44 #include "runtime/icache.hpp" |
| 45 #include "runtime/java.hpp" | |
| 46 #include "runtime/mutexLocker.hpp" | |
| 47 #include "services/memoryService.hpp" | |
| 10405 | 48 #include "trace/tracing.hpp" |
| 1972 | 49 #include "utilities/xmlstream.hpp" |
| 0 | 50 |
| 51 // Helper class for printing in CodeCache | |
| 52 | |
| 53 class CodeBlob_sizes { | |
| 54 private: | |
| 55 int count; | |
| 56 int total_size; | |
| 57 int header_size; | |
| 58 int code_size; | |
| 59 int stub_size; | |
| 60 int relocation_size; | |
| 61 int scopes_oop_size; | |
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62 int scopes_metadata_size; |
| 0 | 63 int scopes_data_size; |
| 64 int scopes_pcs_size; | |
| 65 | |
| 66 public: | |
| 67 CodeBlob_sizes() { | |
| 68 count = 0; | |
| 69 total_size = 0; | |
| 70 header_size = 0; | |
| 71 code_size = 0; | |
| 72 stub_size = 0; | |
| 73 relocation_size = 0; | |
| 74 scopes_oop_size = 0; | |
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75 scopes_metadata_size = 0; |
| 0 | 76 scopes_data_size = 0; |
| 77 scopes_pcs_size = 0; | |
| 78 } | |
| 79 | |
| 80 int total() { return total_size; } | |
| 81 bool is_empty() { return count == 0; } | |
| 82 | |
| 83 void print(const char* title) { | |
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84 tty->print_cr(" #%d %s = %dK (hdr %d%%, loc %d%%, code %d%%, stub %d%%, [oops %d%%, metadata %d%%, data %d%%, pcs %d%%])", |
| 0 | 85 count, |
| 86 title, | |
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87 (int)(total() / K), |
| 0 | 88 header_size * 100 / total_size, |
| 89 relocation_size * 100 / total_size, | |
| 90 code_size * 100 / total_size, | |
| 91 stub_size * 100 / total_size, | |
| 92 scopes_oop_size * 100 / total_size, | |
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93 scopes_metadata_size * 100 / total_size, |
| 0 | 94 scopes_data_size * 100 / total_size, |
| 95 scopes_pcs_size * 100 / total_size); | |
| 96 } | |
| 97 | |
| 98 void add(CodeBlob* cb) { | |
| 99 count++; | |
| 100 total_size += cb->size(); | |
| 101 header_size += cb->header_size(); | |
| 102 relocation_size += cb->relocation_size(); | |
| 103 if (cb->is_nmethod()) { | |
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104 nmethod* nm = cb->as_nmethod_or_null(); |
| 1748 | 105 code_size += nm->insts_size(); |
| 0 | 106 stub_size += nm->stub_size(); |
| 107 | |
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108 scopes_oop_size += nm->oops_size(); |
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109 scopes_metadata_size += nm->metadata_size(); |
| 0 | 110 scopes_data_size += nm->scopes_data_size(); |
| 111 scopes_pcs_size += nm->scopes_pcs_size(); | |
| 112 } else { | |
| 1748 | 113 code_size += cb->code_size(); |
| 0 | 114 } |
| 115 } | |
| 116 }; | |
| 117 | |
| 118 // CodeCache implementation | |
| 119 | |
| 120 CodeHeap * CodeCache::_heap = new CodeHeap(); | |
| 121 int CodeCache::_number_of_blobs = 0; | |
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122 int CodeCache::_number_of_adapters = 0; |
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123 int CodeCache::_number_of_nmethods = 0; |
| 0 | 124 int CodeCache::_number_of_nmethods_with_dependencies = 0; |
| 125 bool CodeCache::_needs_cache_clean = false; | |
| 989 | 126 nmethod* CodeCache::_scavenge_root_nmethods = NULL; |
| 0 | 127 |
| 10405 | 128 int CodeCache::_codemem_full_count = 0; |
| 0 | 129 |
| 130 CodeBlob* CodeCache::first() { | |
| 131 assert_locked_or_safepoint(CodeCache_lock); | |
| 132 return (CodeBlob*)_heap->first(); | |
| 133 } | |
| 134 | |
| 135 | |
| 136 CodeBlob* CodeCache::next(CodeBlob* cb) { | |
| 137 assert_locked_or_safepoint(CodeCache_lock); | |
| 138 return (CodeBlob*)_heap->next(cb); | |
| 139 } | |
| 140 | |
| 141 | |
| 142 CodeBlob* CodeCache::alive(CodeBlob *cb) { | |
| 143 assert_locked_or_safepoint(CodeCache_lock); | |
| 144 while (cb != NULL && !cb->is_alive()) cb = next(cb); | |
| 145 return cb; | |
| 146 } | |
| 147 | |
| 148 | |
| 149 nmethod* CodeCache::alive_nmethod(CodeBlob* cb) { | |
| 150 assert_locked_or_safepoint(CodeCache_lock); | |
| 151 while (cb != NULL && (!cb->is_alive() || !cb->is_nmethod())) cb = next(cb); | |
| 152 return (nmethod*)cb; | |
| 153 } | |
| 154 | |
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155 nmethod* CodeCache::first_nmethod() { |
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156 assert_locked_or_safepoint(CodeCache_lock); |
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157 CodeBlob* cb = first(); |
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158 while (cb != NULL && !cb->is_nmethod()) { |
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159 cb = next(cb); |
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160 } |
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161 return (nmethod*)cb; |
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162 } |
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163 |
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164 nmethod* CodeCache::next_nmethod (CodeBlob* cb) { |
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165 assert_locked_or_safepoint(CodeCache_lock); |
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166 cb = next(cb); |
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167 while (cb != NULL && !cb->is_nmethod()) { |
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168 cb = next(cb); |
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169 } |
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170 return (nmethod*)cb; |
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171 } |
| 0 | 172 |
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173 static size_t maxCodeCacheUsed = 0; |
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174 |
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175 CodeBlob* CodeCache::allocate(int size, bool is_critical) { |
| 0 | 176 // Do not seize the CodeCache lock here--if the caller has not |
| 177 // already done so, we are going to lose bigtime, since the code | |
| 178 // cache will contain a garbage CodeBlob until the caller can | |
| 179 // run the constructor for the CodeBlob subclass he is busy | |
| 180 // instantiating. | |
| 181 guarantee(size >= 0, "allocation request must be reasonable"); | |
| 182 assert_locked_or_safepoint(CodeCache_lock); | |
| 183 CodeBlob* cb = NULL; | |
| 184 _number_of_blobs++; | |
| 185 while (true) { | |
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186 cb = (CodeBlob*)_heap->allocate(size, is_critical); |
| 0 | 187 if (cb != NULL) break; |
| 188 if (!_heap->expand_by(CodeCacheExpansionSize)) { | |
| 189 // Expansion failed | |
| 190 return NULL; | |
| 191 } | |
| 192 if (PrintCodeCacheExtension) { | |
| 193 ResourceMark rm; | |
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194 tty->print_cr("code cache extended to [" INTPTR_FORMAT ", " INTPTR_FORMAT "] (" SSIZE_FORMAT " 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); | |
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340 |
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341 if (UseG1GC) { |
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342 return; |
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343 } |
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344 |
| 989 | 345 debug_only(mark_scavenge_root_nmethods()); |
| 346 | |
| 347 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
| 348 debug_only(cur->clear_scavenge_root_marked()); | |
| 349 assert(cur->scavenge_root_not_marked(), ""); | |
| 350 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
| 351 | |
| 352 bool is_live = (!cur->is_zombie() && !cur->is_unloaded()); | |
| 353 #ifndef PRODUCT | |
| 354 if (TraceScavenge) { | |
| 355 cur->print_on(tty, is_live ? "scavenge root" : "dead scavenge root"); tty->cr(); | |
| 356 } | |
| 357 #endif //PRODUCT | |
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358 if (is_live) { |
| 989 | 359 // Perform cur->oops_do(f), maybe just once per nmethod. |
| 360 f->do_code_blob(cur); | |
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361 } |
| 989 | 362 } |
| 363 | |
| 364 // Check for stray marks. | |
| 365 debug_only(verify_perm_nmethods(NULL)); | |
| 366 } | |
| 367 | |
| 368 void CodeCache::add_scavenge_root_nmethod(nmethod* nm) { | |
| 369 assert_locked_or_safepoint(CodeCache_lock); | |
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370 |
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371 if (UseG1GC) { |
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372 return; |
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373 } |
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374 |
| 989 | 375 nm->set_on_scavenge_root_list(); |
| 376 nm->set_scavenge_root_link(_scavenge_root_nmethods); | |
| 377 set_scavenge_root_nmethods(nm); | |
| 378 print_trace("add_scavenge_root", nm); | |
| 379 } | |
| 380 | |
| 381 void CodeCache::drop_scavenge_root_nmethod(nmethod* nm) { | |
| 382 assert_locked_or_safepoint(CodeCache_lock); | |
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383 |
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384 if (UseG1GC) { |
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385 return; |
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386 } |
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387 |
| 989 | 388 print_trace("drop_scavenge_root", nm); |
| 389 nmethod* last = NULL; | |
| 390 nmethod* cur = scavenge_root_nmethods(); | |
| 391 while (cur != NULL) { | |
| 392 nmethod* next = cur->scavenge_root_link(); | |
| 393 if (cur == nm) { | |
| 394 if (last != NULL) | |
| 395 last->set_scavenge_root_link(next); | |
| 396 else set_scavenge_root_nmethods(next); | |
| 397 nm->set_scavenge_root_link(NULL); | |
| 398 nm->clear_on_scavenge_root_list(); | |
| 399 return; | |
| 400 } | |
| 401 last = cur; | |
| 402 cur = next; | |
| 403 } | |
| 404 assert(false, "should have been on list"); | |
| 405 } | |
| 406 | |
| 407 void CodeCache::prune_scavenge_root_nmethods() { | |
| 408 assert_locked_or_safepoint(CodeCache_lock); | |
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409 |
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410 if (UseG1GC) { |
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411 return; |
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412 } |
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413 |
| 989 | 414 debug_only(mark_scavenge_root_nmethods()); |
| 415 | |
| 416 nmethod* last = NULL; | |
| 417 nmethod* cur = scavenge_root_nmethods(); | |
| 418 while (cur != NULL) { | |
| 419 nmethod* next = cur->scavenge_root_link(); | |
| 420 debug_only(cur->clear_scavenge_root_marked()); | |
| 421 assert(cur->scavenge_root_not_marked(), ""); | |
| 422 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
| 423 | |
| 424 if (!cur->is_zombie() && !cur->is_unloaded() | |
| 425 && cur->detect_scavenge_root_oops()) { | |
| 426 // Keep it. Advance 'last' to prevent deletion. | |
| 427 last = cur; | |
| 428 } else { | |
| 429 // Prune it from the list, so we don't have to look at it any more. | |
| 430 print_trace("prune_scavenge_root", cur); | |
| 431 cur->set_scavenge_root_link(NULL); | |
| 432 cur->clear_on_scavenge_root_list(); | |
| 433 if (last != NULL) | |
| 434 last->set_scavenge_root_link(next); | |
| 435 else set_scavenge_root_nmethods(next); | |
| 436 } | |
| 437 cur = next; | |
| 438 } | |
| 439 | |
| 440 // Check for stray marks. | |
| 441 debug_only(verify_perm_nmethods(NULL)); | |
| 442 } | |
| 443 | |
| 444 #ifndef PRODUCT | |
| 445 void CodeCache::asserted_non_scavengable_nmethods_do(CodeBlobClosure* f) { | |
|
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446 if (UseG1GC) { |
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447 return; |
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448 } |
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449 |
| 989 | 450 // While we are here, verify the integrity of the list. |
| 451 mark_scavenge_root_nmethods(); | |
| 452 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
| 453 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
| 454 cur->clear_scavenge_root_marked(); | |
| 455 } | |
| 456 verify_perm_nmethods(f); | |
| 457 } | |
| 458 | |
| 459 // Temporarily mark nmethods that are claimed to be on the non-perm list. | |
| 460 void CodeCache::mark_scavenge_root_nmethods() { | |
| 461 FOR_ALL_ALIVE_BLOBS(cb) { | |
| 462 if (cb->is_nmethod()) { | |
| 463 nmethod *nm = (nmethod*)cb; | |
| 464 assert(nm->scavenge_root_not_marked(), "clean state"); | |
| 465 if (nm->on_scavenge_root_list()) | |
| 466 nm->set_scavenge_root_marked(); | |
| 467 } | |
| 468 } | |
| 469 } | |
| 470 | |
| 471 // If the closure is given, run it on the unlisted nmethods. | |
| 472 // Also make sure that the effects of mark_scavenge_root_nmethods is gone. | |
| 473 void CodeCache::verify_perm_nmethods(CodeBlobClosure* f_or_null) { | |
| 474 FOR_ALL_ALIVE_BLOBS(cb) { | |
| 475 bool call_f = (f_or_null != NULL); | |
| 476 if (cb->is_nmethod()) { | |
| 477 nmethod *nm = (nmethod*)cb; | |
| 478 assert(nm->scavenge_root_not_marked(), "must be already processed"); | |
| 479 if (nm->on_scavenge_root_list()) | |
| 480 call_f = false; // don't show this one to the client | |
| 481 nm->verify_scavenge_root_oops(); | |
| 482 } else { | |
| 483 call_f = false; // not an nmethod | |
| 484 } | |
| 485 if (call_f) f_or_null->do_code_blob(cb); | |
| 486 } | |
| 487 } | |
| 488 #endif //PRODUCT | |
| 489 | |
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490 void CodeCache::verify_clean_inline_caches() { |
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491 #ifdef ASSERT |
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492 FOR_ALL_ALIVE_BLOBS(cb) { |
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493 if (cb->is_nmethod()) { |
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494 nmethod* nm = (nmethod*)cb; |
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495 assert(!nm->is_unloaded(), "Tautology"); |
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496 nm->verify_clean_inline_caches(); |
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497 nm->verify(); |
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498 } |
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499 } |
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500 #endif |
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501 } |
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502 |
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503 void CodeCache::verify_icholder_relocations() { |
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504 #ifdef ASSERT |
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505 // make sure that we aren't leaking icholders |
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506 int count = 0; |
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507 FOR_ALL_BLOBS(cb) { |
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508 if (cb->is_nmethod()) { |
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509 nmethod* nm = (nmethod*)cb; |
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510 count += nm->verify_icholder_relocations(); |
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511 } |
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512 } |
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513 |
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514 assert(count + InlineCacheBuffer::pending_icholder_count() + CompiledICHolder::live_not_claimed_count() == |
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515 CompiledICHolder::live_count(), "must agree"); |
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516 #endif |
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517 } |
| 1202 | 518 |
| 0 | 519 void CodeCache::gc_prologue() { |
| 520 } | |
| 521 | |
| 522 void CodeCache::gc_epilogue() { | |
| 523 assert_locked_or_safepoint(CodeCache_lock); | |
| 524 FOR_ALL_ALIVE_BLOBS(cb) { | |
| 525 if (cb->is_nmethod()) { | |
| 526 nmethod *nm = (nmethod*)cb; | |
| 527 assert(!nm->is_unloaded(), "Tautology"); | |
| 528 if (needs_cache_clean()) { | |
| 529 nm->cleanup_inline_caches(); | |
| 530 } | |
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531 DEBUG_ONLY(nm->verify()); |
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532 DEBUG_ONLY(nm->verify_oop_relocations()); |
| 0 | 533 } |
| 534 } | |
| 535 set_needs_cache_clean(false); | |
| 989 | 536 prune_scavenge_root_nmethods(); |
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537 |
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538 verify_icholder_relocations(); |
| 0 | 539 } |
| 540 | |
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541 void CodeCache::verify_oops() { |
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542 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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543 VerifyOopClosure voc; |
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544 FOR_ALL_ALIVE_BLOBS(cb) { |
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545 if (cb->is_nmethod()) { |
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546 nmethod *nm = (nmethod*)cb; |
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547 nm->oops_do(&voc); |
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548 nm->verify_oop_relocations(); |
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549 } |
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550 } |
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551 } |
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552 |
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553 |
| 0 | 554 address CodeCache::first_address() { |
| 555 assert_locked_or_safepoint(CodeCache_lock); | |
|
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556 return (address)_heap->low_boundary(); |
| 0 | 557 } |
| 558 | |
| 559 | |
| 560 address CodeCache::last_address() { | |
| 561 assert_locked_or_safepoint(CodeCache_lock); | |
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562 return (address)_heap->high(); |
| 0 | 563 } |
| 564 | |
|
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565 /** |
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566 * Returns the reverse free ratio. E.g., if 25% (1/4) of the code cache |
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567 * is free, reverse_free_ratio() returns 4. |
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568 */ |
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569 double CodeCache::reverse_free_ratio() { |
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570 double unallocated_capacity = (double)(CodeCache::unallocated_capacity() - CodeCacheMinimumFreeSpace); |
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571 double max_capacity = (double)CodeCache::max_capacity(); |
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572 return max_capacity / unallocated_capacity; |
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573 } |
| 0 | 574 |
| 575 void icache_init(); | |
| 576 | |
| 577 void CodeCache::initialize() { | |
| 578 assert(CodeCacheSegmentSize >= (uintx)CodeEntryAlignment, "CodeCacheSegmentSize must be large enough to align entry points"); | |
| 579 #ifdef COMPILER2 | |
| 580 assert(CodeCacheSegmentSize >= (uintx)OptoLoopAlignment, "CodeCacheSegmentSize must be large enough to align inner loops"); | |
| 581 #endif | |
| 582 assert(CodeCacheSegmentSize >= sizeof(jdouble), "CodeCacheSegmentSize must be large enough to align constants"); | |
| 583 // This was originally just a check of the alignment, causing failure, instead, round | |
| 584 // the code cache to the page size. In particular, Solaris is moving to a larger | |
| 585 // default page size. | |
| 586 CodeCacheExpansionSize = round_to(CodeCacheExpansionSize, os::vm_page_size()); | |
| 587 InitialCodeCacheSize = round_to(InitialCodeCacheSize, os::vm_page_size()); | |
| 588 ReservedCodeCacheSize = round_to(ReservedCodeCacheSize, os::vm_page_size()); | |
| 589 if (!_heap->reserve(ReservedCodeCacheSize, InitialCodeCacheSize, CodeCacheSegmentSize)) { | |
| 590 vm_exit_during_initialization("Could not reserve enough space for code cache"); | |
| 591 } | |
| 592 | |
| 593 MemoryService::add_code_heap_memory_pool(_heap); | |
| 594 | |
| 595 // Initialize ICache flush mechanism | |
| 596 // This service is needed for os::register_code_area | |
| 597 icache_init(); | |
| 598 | |
| 599 // Give OS a chance to register generated code area. | |
| 600 // This is used on Windows 64 bit platforms to register | |
| 601 // Structured Exception Handlers for our generated code. | |
| 602 os::register_code_area(_heap->low_boundary(), _heap->high_boundary()); | |
| 603 } | |
| 604 | |
| 605 | |
| 606 void codeCache_init() { | |
| 607 CodeCache::initialize(); | |
| 608 } | |
| 609 | |
| 610 //------------------------------------------------------------------------------------------------ | |
| 611 | |
| 612 int CodeCache::number_of_nmethods_with_dependencies() { | |
| 613 return _number_of_nmethods_with_dependencies; | |
| 614 } | |
| 615 | |
| 616 void CodeCache::clear_inline_caches() { | |
| 617 assert_locked_or_safepoint(CodeCache_lock); | |
| 618 FOR_ALL_ALIVE_NMETHODS(nm) { | |
| 619 nm->clear_inline_caches(); | |
| 620 } | |
| 621 } | |
| 622 | |
| 623 #ifndef PRODUCT | |
| 624 // used to keep track of how much time is spent in mark_for_deoptimization | |
| 625 static elapsedTimer dependentCheckTime; | |
| 626 static int dependentCheckCount = 0; | |
| 627 #endif // PRODUCT | |
| 628 | |
| 629 | |
| 630 int CodeCache::mark_for_deoptimization(DepChange& changes) { | |
| 631 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 632 | |
| 633 #ifndef PRODUCT | |
| 634 dependentCheckTime.start(); | |
| 635 dependentCheckCount++; | |
| 636 #endif // PRODUCT | |
| 637 | |
| 638 int number_of_marked_CodeBlobs = 0; | |
| 639 | |
| 640 // search the hierarchy looking for nmethods which are affected by the loading of this class | |
| 641 | |
| 642 // then search the interfaces this class implements looking for nmethods | |
| 643 // which might be dependent of the fact that an interface only had one | |
| 644 // implementor. | |
| 645 | |
| 646 { No_Safepoint_Verifier nsv; | |
| 647 for (DepChange::ContextStream str(changes, nsv); str.next(); ) { | |
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648 Klass* d = str.klass(); |
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649 number_of_marked_CodeBlobs += InstanceKlass::cast(d)->mark_dependent_nmethods(changes); |
| 0 | 650 } |
| 651 } | |
| 652 | |
| 653 if (VerifyDependencies) { | |
| 654 // Turn off dependency tracing while actually testing deps. | |
| 655 NOT_PRODUCT( FlagSetting fs(TraceDependencies, false) ); | |
| 656 FOR_ALL_ALIVE_NMETHODS(nm) { | |
| 657 if (!nm->is_marked_for_deoptimization() && | |
| 658 nm->check_all_dependencies()) { | |
| 659 ResourceMark rm; | |
| 660 tty->print_cr("Should have been marked for deoptimization:"); | |
| 661 changes.print(); | |
| 662 nm->print(); | |
| 663 nm->print_dependencies(); | |
| 664 } | |
| 665 } | |
| 666 } | |
| 667 | |
| 668 #ifndef PRODUCT | |
| 669 dependentCheckTime.stop(); | |
| 670 #endif // PRODUCT | |
| 671 | |
| 672 return number_of_marked_CodeBlobs; | |
| 673 } | |
| 674 | |
| 675 | |
| 676 #ifdef HOTSWAP | |
| 677 int CodeCache::mark_for_evol_deoptimization(instanceKlassHandle dependee) { | |
| 678 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 679 int number_of_marked_CodeBlobs = 0; | |
| 680 | |
| 681 // Deoptimize all methods of the evolving class itself | |
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682 Array<Method*>* old_methods = dependee->methods(); |
| 0 | 683 for (int i = 0; i < old_methods->length(); i++) { |
| 684 ResourceMark rm; | |
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685 Method* old_method = old_methods->at(i); |
| 0 | 686 nmethod *nm = old_method->code(); |
| 687 if (nm != NULL) { | |
| 688 nm->mark_for_deoptimization(); | |
| 689 number_of_marked_CodeBlobs++; | |
| 690 } | |
| 691 } | |
| 692 | |
| 693 FOR_ALL_ALIVE_NMETHODS(nm) { | |
| 694 if (nm->is_marked_for_deoptimization()) { | |
| 695 // ...Already marked in the previous pass; don't count it again. | |
| 696 } else if (nm->is_evol_dependent_on(dependee())) { | |
| 697 ResourceMark rm; | |
| 698 nm->mark_for_deoptimization(); | |
| 699 number_of_marked_CodeBlobs++; | |
| 700 } else { | |
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701 // flush caches in case they refer to a redefined Method* |
| 0 | 702 nm->clear_inline_caches(); |
| 703 } | |
| 704 } | |
| 705 | |
| 706 return number_of_marked_CodeBlobs; | |
| 707 } | |
| 708 #endif // HOTSWAP | |
| 709 | |
| 710 | |
| 711 // Deoptimize all methods | |
| 712 void CodeCache::mark_all_nmethods_for_deoptimization() { | |
| 713 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 714 FOR_ALL_ALIVE_NMETHODS(nm) { | |
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715 if (!nm->method()->is_method_handle_intrinsic()) { |
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716 nm->mark_for_deoptimization(); |
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717 } |
| 0 | 718 } |
| 719 } | |
| 720 | |
| 721 | |
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722 int CodeCache::mark_for_deoptimization(Method* dependee) { |
| 0 | 723 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| 724 int number_of_marked_CodeBlobs = 0; | |
| 725 | |
| 726 FOR_ALL_ALIVE_NMETHODS(nm) { | |
| 727 if (nm->is_dependent_on_method(dependee)) { | |
| 728 ResourceMark rm; | |
| 729 nm->mark_for_deoptimization(); | |
| 730 number_of_marked_CodeBlobs++; | |
| 731 } | |
| 732 } | |
| 733 | |
| 734 return number_of_marked_CodeBlobs; | |
| 735 } | |
| 736 | |
| 737 void CodeCache::make_marked_nmethods_zombies() { | |
| 738 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
| 739 FOR_ALL_ALIVE_NMETHODS(nm) { | |
| 740 if (nm->is_marked_for_deoptimization()) { | |
| 741 | |
| 742 // If the nmethod has already been made non-entrant and it can be converted | |
| 743 // then zombie it now. Otherwise make it non-entrant and it will eventually | |
| 744 // be zombied when it is no longer seen on the stack. Note that the nmethod | |
| 745 // might be "entrant" and not on the stack and so could be zombied immediately | |
| 746 // but we can't tell because we don't track it on stack until it becomes | |
| 747 // non-entrant. | |
| 748 | |
| 749 if (nm->is_not_entrant() && nm->can_not_entrant_be_converted()) { | |
| 750 nm->make_zombie(); | |
| 751 } else { | |
| 752 nm->make_not_entrant(); | |
| 753 } | |
| 754 } | |
| 755 } | |
| 756 } | |
| 757 | |
| 758 void CodeCache::make_marked_nmethods_not_entrant() { | |
| 759 assert_locked_or_safepoint(CodeCache_lock); | |
| 760 FOR_ALL_ALIVE_NMETHODS(nm) { | |
| 761 if (nm->is_marked_for_deoptimization()) { | |
| 762 nm->make_not_entrant(); | |
| 763 } | |
| 764 } | |
| 765 } | |
| 766 | |
| 767 void CodeCache::verify() { | |
| 768 _heap->verify(); | |
| 769 FOR_ALL_ALIVE_BLOBS(p) { | |
| 770 p->verify(); | |
| 771 } | |
| 772 } | |
| 773 | |
| 10405 | 774 void CodeCache::report_codemem_full() { |
| 775 _codemem_full_count++; | |
| 776 EventCodeCacheFull event; | |
| 777 if (event.should_commit()) { | |
| 778 event.set_startAddress((u8)low_bound()); | |
| 779 event.set_commitedTopAddress((u8)high()); | |
| 780 event.set_reservedTopAddress((u8)high_bound()); | |
| 781 event.set_entryCount(nof_blobs()); | |
| 782 event.set_methodCount(nof_nmethods()); | |
| 783 event.set_adaptorCount(nof_adapters()); | |
| 784 event.set_unallocatedCapacity(unallocated_capacity()/K); | |
| 785 event.set_fullCount(_codemem_full_count); | |
| 786 event.commit(); | |
| 787 } | |
| 788 } | |
| 789 | |
| 0 | 790 //------------------------------------------------------------------------------------------------ |
| 791 // Non-product version | |
| 792 | |
| 793 #ifndef PRODUCT | |
| 794 | |
| 795 void CodeCache::verify_if_often() { | |
| 796 if (VerifyCodeCacheOften) { | |
| 797 _heap->verify(); | |
| 798 } | |
| 799 } | |
| 800 | |
| 989 | 801 void CodeCache::print_trace(const char* event, CodeBlob* cb, int size) { |
| 802 if (PrintCodeCache2) { // Need to add a new flag | |
| 803 ResourceMark rm; | |
| 804 if (size == 0) size = cb->size(); | |
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805 tty->print_cr("CodeCache %s: addr: " INTPTR_FORMAT ", size: 0x%x", event, p2i(cb), size); |
| 989 | 806 } |
| 807 } | |
| 808 | |
| 0 | 809 void CodeCache::print_internals() { |
| 810 int nmethodCount = 0; | |
| 811 int runtimeStubCount = 0; | |
| 812 int adapterCount = 0; | |
| 813 int deoptimizationStubCount = 0; | |
| 814 int uncommonTrapStubCount = 0; | |
| 815 int bufferBlobCount = 0; | |
| 816 int total = 0; | |
| 817 int nmethodAlive = 0; | |
| 818 int nmethodNotEntrant = 0; | |
| 819 int nmethodZombie = 0; | |
| 820 int nmethodUnloaded = 0; | |
| 821 int nmethodJava = 0; | |
| 822 int nmethodNative = 0; | |
| 823 int maxCodeSize = 0; | |
| 824 ResourceMark rm; | |
| 825 | |
| 826 CodeBlob *cb; | |
| 827 for (cb = first(); cb != NULL; cb = next(cb)) { | |
| 828 total++; | |
| 829 if (cb->is_nmethod()) { | |
| 830 nmethod* nm = (nmethod*)cb; | |
| 831 | |
| 832 if (Verbose && nm->method() != NULL) { | |
| 833 ResourceMark rm; | |
| 834 char *method_name = nm->method()->name_and_sig_as_C_string(); | |
| 835 tty->print("%s", method_name); | |
| 836 if(nm->is_alive()) { tty->print_cr(" alive"); } | |
| 837 if(nm->is_not_entrant()) { tty->print_cr(" not-entrant"); } | |
| 838 if(nm->is_zombie()) { tty->print_cr(" zombie"); } | |
| 839 } | |
| 840 | |
| 841 nmethodCount++; | |
| 842 | |
| 843 if(nm->is_alive()) { nmethodAlive++; } | |
| 844 if(nm->is_not_entrant()) { nmethodNotEntrant++; } | |
| 845 if(nm->is_zombie()) { nmethodZombie++; } | |
| 846 if(nm->is_unloaded()) { nmethodUnloaded++; } | |
| 847 if(nm->is_native_method()) { nmethodNative++; } | |
| 848 | |
| 849 if(nm->method() != NULL && nm->is_java_method()) { | |
| 850 nmethodJava++; | |
| 1748 | 851 if (nm->insts_size() > maxCodeSize) { |
| 852 maxCodeSize = nm->insts_size(); | |
| 0 | 853 } |
| 854 } | |
| 855 } else if (cb->is_runtime_stub()) { | |
| 856 runtimeStubCount++; | |
| 857 } else if (cb->is_deoptimization_stub()) { | |
| 858 deoptimizationStubCount++; | |
| 859 } else if (cb->is_uncommon_trap_stub()) { | |
| 860 uncommonTrapStubCount++; | |
| 861 } else if (cb->is_adapter_blob()) { | |
| 862 adapterCount++; | |
| 863 } else if (cb->is_buffer_blob()) { | |
| 864 bufferBlobCount++; | |
| 865 } | |
| 866 } | |
| 867 | |
| 868 int bucketSize = 512; | |
| 869 int bucketLimit = maxCodeSize / bucketSize + 1; | |
| 6197 | 870 int *buckets = NEW_C_HEAP_ARRAY(int, bucketLimit, mtCode); |
| 0 | 871 memset(buckets,0,sizeof(int) * bucketLimit); |
| 872 | |
| 873 for (cb = first(); cb != NULL; cb = next(cb)) { | |
| 874 if (cb->is_nmethod()) { | |
| 875 nmethod* nm = (nmethod*)cb; | |
| 876 if(nm->is_java_method()) { | |
| 1748 | 877 buckets[nm->insts_size() / bucketSize]++; |
| 0 | 878 } |
| 879 } | |
| 880 } | |
| 881 tty->print_cr("Code Cache Entries (total of %d)",total); | |
| 882 tty->print_cr("-------------------------------------------------"); | |
| 883 tty->print_cr("nmethods: %d",nmethodCount); | |
| 884 tty->print_cr("\talive: %d",nmethodAlive); | |
| 885 tty->print_cr("\tnot_entrant: %d",nmethodNotEntrant); | |
| 886 tty->print_cr("\tzombie: %d",nmethodZombie); | |
| 887 tty->print_cr("\tunloaded: %d",nmethodUnloaded); | |
| 888 tty->print_cr("\tjava: %d",nmethodJava); | |
| 889 tty->print_cr("\tnative: %d",nmethodNative); | |
| 890 tty->print_cr("runtime_stubs: %d",runtimeStubCount); | |
| 891 tty->print_cr("adapters: %d",adapterCount); | |
| 892 tty->print_cr("buffer blobs: %d",bufferBlobCount); | |
| 893 tty->print_cr("deoptimization_stubs: %d",deoptimizationStubCount); | |
| 894 tty->print_cr("uncommon_traps: %d",uncommonTrapStubCount); | |
| 895 tty->print_cr("\nnmethod size distribution (non-zombie java)"); | |
| 896 tty->print_cr("-------------------------------------------------"); | |
| 897 | |
| 898 for(int i=0; i<bucketLimit; i++) { | |
| 899 if(buckets[i] != 0) { | |
| 900 tty->print("%d - %d bytes",i*bucketSize,(i+1)*bucketSize); | |
| 901 tty->fill_to(40); | |
| 902 tty->print_cr("%d",buckets[i]); | |
| 903 } | |
| 904 } | |
| 905 | |
| 6197 | 906 FREE_C_HEAP_ARRAY(int, buckets, mtCode); |
| 0 | 907 } |
| 908 | |
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909 #endif // !PRODUCT |
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910 |
| 0 | 911 void CodeCache::print() { |
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912 print_summary(tty); |
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913 |
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914 #ifndef PRODUCT |
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915 if (!Verbose) return; |
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916 |
| 0 | 917 CodeBlob_sizes live; |
| 918 CodeBlob_sizes dead; | |
| 919 | |
| 920 FOR_ALL_BLOBS(p) { | |
| 921 if (!p->is_alive()) { | |
| 922 dead.add(p); | |
| 923 } else { | |
| 924 live.add(p); | |
| 925 } | |
| 926 } | |
| 927 | |
| 928 tty->print_cr("CodeCache:"); | |
| 929 | |
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930 tty->print_cr("nmethod dependency checking time %f, per dependent %f", dependentCheckTime.seconds(), |
| 0 | 931 dependentCheckTime.seconds() / dependentCheckCount); |
| 932 | |
| 933 if (!live.is_empty()) { | |
| 934 live.print("live"); | |
| 935 } | |
| 936 if (!dead.is_empty()) { | |
| 937 dead.print("dead"); | |
| 938 } | |
| 939 | |
| 940 | |
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941 if (WizardMode) { |
| 0 | 942 // print the oop_map usage |
| 943 int code_size = 0; | |
| 944 int number_of_blobs = 0; | |
| 945 int number_of_oop_maps = 0; | |
| 946 int map_size = 0; | |
| 947 FOR_ALL_BLOBS(p) { | |
| 948 if (p->is_alive()) { | |
| 949 number_of_blobs++; | |
| 1748 | 950 code_size += p->code_size(); |
| 0 | 951 OopMapSet* set = p->oop_maps(); |
| 952 if (set != NULL) { | |
| 953 number_of_oop_maps += set->size(); | |
| 1748 | 954 map_size += set->heap_size(); |
| 0 | 955 } |
| 956 } | |
| 957 } | |
| 958 tty->print_cr("OopMaps"); | |
| 959 tty->print_cr(" #blobs = %d", number_of_blobs); | |
| 960 tty->print_cr(" code size = %d", code_size); | |
| 961 tty->print_cr(" #oop_maps = %d", number_of_oop_maps); | |
| 962 tty->print_cr(" map size = %d", map_size); | |
| 963 } | |
| 964 | |
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965 #endif // !PRODUCT |
| 0 | 966 } |
| 967 | |
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968 void CodeCache::print_summary(outputStream* st, bool detailed) { |
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969 size_t total = (_heap->high_boundary() - _heap->low_boundary()); |
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970 st->print_cr("CodeCache: size=" SIZE_FORMAT "Kb used=" SIZE_FORMAT |
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971 "Kb max_used=" SIZE_FORMAT "Kb free=" SIZE_FORMAT "Kb", |
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972 total/K, (total - unallocated_capacity())/K, |
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973 maxCodeCacheUsed/K, unallocated_capacity()/K); |
| 1907 | 974 |
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975 if (detailed) { |
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976 st->print_cr(" bounds [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT "]", |
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977 p2i(_heap->low_boundary()), |
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978 p2i(_heap->high()), |
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12324
diff
changeset
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979 p2i(_heap->high_boundary())); |
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7595
9deda4d8e126
8005204: Code Cache Reduction: command line options implementation
vladidan
parents:
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diff
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980 st->print_cr(" total_blobs=" UINT32_FORMAT " nmethods=" UINT32_FORMAT |
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vladidan
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981 " adapters=" UINT32_FORMAT, |
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9deda4d8e126
8005204: Code Cache Reduction: command line options implementation
vladidan
parents:
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982 nof_blobs(), nof_nmethods(), nof_adapters()); |
|
9deda4d8e126
8005204: Code Cache Reduction: command line options implementation
vladidan
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983 st->print_cr(" compilation: %s", CompileBroker::should_compile_new_jobs() ? |
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9deda4d8e126
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6787
diff
changeset
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984 "enabled" : Arguments::mode() == Arguments::_int ? |
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9deda4d8e126
8005204: Code Cache Reduction: command line options implementation
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diff
changeset
|
985 "disabled (interpreter mode)" : |
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9deda4d8e126
8005204: Code Cache Reduction: command line options implementation
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986 "disabled (not enough contiguous free space left)"); |
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9deda4d8e126
8005204: Code Cache Reduction: command line options implementation
vladidan
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987 } |
| 1907 | 988 } |
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2353
1c0cf339481b
7025742: Can not use CodeCache::unallocated_capacity() with fragmented CodeCache
kvn
parents:
2091
diff
changeset
|
989 |
|
1c0cf339481b
7025742: Can not use CodeCache::unallocated_capacity() with fragmented CodeCache
kvn
parents:
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990 void CodeCache::log_state(outputStream* st) { |
|
1c0cf339481b
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parents:
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diff
changeset
|
991 st->print(" total_blobs='" UINT32_FORMAT "' nmethods='" UINT32_FORMAT "'" |
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10114
a7fb14888912
8006952: Slow VM due to excessive code cache freelist iteration
neliasso
parents:
7595
diff
changeset
|
992 " adapters='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'", |
|
2353
1c0cf339481b
7025742: Can not use CodeCache::unallocated_capacity() with fragmented CodeCache
kvn
parents:
2091
diff
changeset
|
993 nof_blobs(), nof_nmethods(), nof_adapters(), |
|
10114
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8006952: Slow VM due to excessive code cache freelist iteration
neliasso
parents:
7595
diff
changeset
|
994 unallocated_capacity()); |
|
2353
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7025742: Can not use CodeCache::unallocated_capacity() with fragmented CodeCache
kvn
parents:
2091
diff
changeset
|
995 } |
|
2457
527977d4f740
7033779: CodeCache::largest_free_block may need to hold the CodeCache lock
never
parents:
2376
diff
changeset
|
996 |