Thu, 14 Apr 2011 00:02:21 -0700
7036236: VM crashes assert((!inside_attrs()) || is_error_reported()) failed ...
Summary: Eliminate the race condition.
Reviewed-by: kvn
duke@435 | 1 | /* |
never@2658 | 2 | * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "code/codeBlob.hpp" |
stefank@2314 | 27 | #include "code/codeCache.hpp" |
stefank@2314 | 28 | #include "code/dependencies.hpp" |
stefank@2314 | 29 | #include "code/nmethod.hpp" |
stefank@2314 | 30 | #include "code/pcDesc.hpp" |
stefank@2314 | 31 | #include "gc_implementation/shared/markSweep.hpp" |
stefank@2314 | 32 | #include "memory/allocation.inline.hpp" |
stefank@2314 | 33 | #include "memory/gcLocker.hpp" |
stefank@2314 | 34 | #include "memory/iterator.hpp" |
stefank@2314 | 35 | #include "memory/resourceArea.hpp" |
stefank@2314 | 36 | #include "oops/methodOop.hpp" |
stefank@2314 | 37 | #include "oops/objArrayOop.hpp" |
stefank@2314 | 38 | #include "oops/oop.inline.hpp" |
stefank@2314 | 39 | #include "runtime/handles.inline.hpp" |
stefank@2314 | 40 | #include "runtime/icache.hpp" |
stefank@2314 | 41 | #include "runtime/java.hpp" |
stefank@2314 | 42 | #include "runtime/mutexLocker.hpp" |
stefank@2314 | 43 | #include "services/memoryService.hpp" |
stefank@2314 | 44 | #include "utilities/xmlstream.hpp" |
duke@435 | 45 | |
duke@435 | 46 | // Helper class for printing in CodeCache |
duke@435 | 47 | |
duke@435 | 48 | class CodeBlob_sizes { |
duke@435 | 49 | private: |
duke@435 | 50 | int count; |
duke@435 | 51 | int total_size; |
duke@435 | 52 | int header_size; |
duke@435 | 53 | int code_size; |
duke@435 | 54 | int stub_size; |
duke@435 | 55 | int relocation_size; |
duke@435 | 56 | int scopes_oop_size; |
duke@435 | 57 | int scopes_data_size; |
duke@435 | 58 | int scopes_pcs_size; |
duke@435 | 59 | |
duke@435 | 60 | public: |
duke@435 | 61 | CodeBlob_sizes() { |
duke@435 | 62 | count = 0; |
duke@435 | 63 | total_size = 0; |
duke@435 | 64 | header_size = 0; |
duke@435 | 65 | code_size = 0; |
duke@435 | 66 | stub_size = 0; |
duke@435 | 67 | relocation_size = 0; |
duke@435 | 68 | scopes_oop_size = 0; |
duke@435 | 69 | scopes_data_size = 0; |
duke@435 | 70 | scopes_pcs_size = 0; |
duke@435 | 71 | } |
duke@435 | 72 | |
duke@435 | 73 | int total() { return total_size; } |
duke@435 | 74 | bool is_empty() { return count == 0; } |
duke@435 | 75 | |
duke@435 | 76 | void print(const char* title) { |
duke@435 | 77 | tty->print_cr(" #%d %s = %dK (hdr %d%%, loc %d%%, code %d%%, stub %d%%, [oops %d%%, data %d%%, pcs %d%%])", |
duke@435 | 78 | count, |
duke@435 | 79 | title, |
duke@435 | 80 | total() / K, |
duke@435 | 81 | header_size * 100 / total_size, |
duke@435 | 82 | relocation_size * 100 / total_size, |
duke@435 | 83 | code_size * 100 / total_size, |
duke@435 | 84 | stub_size * 100 / total_size, |
duke@435 | 85 | scopes_oop_size * 100 / total_size, |
duke@435 | 86 | scopes_data_size * 100 / total_size, |
duke@435 | 87 | scopes_pcs_size * 100 / total_size); |
duke@435 | 88 | } |
duke@435 | 89 | |
duke@435 | 90 | void add(CodeBlob* cb) { |
duke@435 | 91 | count++; |
duke@435 | 92 | total_size += cb->size(); |
duke@435 | 93 | header_size += cb->header_size(); |
duke@435 | 94 | relocation_size += cb->relocation_size(); |
duke@435 | 95 | if (cb->is_nmethod()) { |
twisti@1918 | 96 | nmethod* nm = cb->as_nmethod_or_null(); |
twisti@2103 | 97 | code_size += nm->insts_size(); |
duke@435 | 98 | stub_size += nm->stub_size(); |
duke@435 | 99 | |
twisti@1918 | 100 | scopes_oop_size += nm->oops_size(); |
duke@435 | 101 | scopes_data_size += nm->scopes_data_size(); |
duke@435 | 102 | scopes_pcs_size += nm->scopes_pcs_size(); |
duke@435 | 103 | } else { |
twisti@2103 | 104 | code_size += cb->code_size(); |
duke@435 | 105 | } |
duke@435 | 106 | } |
duke@435 | 107 | }; |
duke@435 | 108 | |
duke@435 | 109 | |
duke@435 | 110 | // CodeCache implementation |
duke@435 | 111 | |
duke@435 | 112 | CodeHeap * CodeCache::_heap = new CodeHeap(); |
duke@435 | 113 | int CodeCache::_number_of_blobs = 0; |
never@1999 | 114 | int CodeCache::_number_of_adapters = 0; |
never@1999 | 115 | int CodeCache::_number_of_nmethods = 0; |
duke@435 | 116 | int CodeCache::_number_of_nmethods_with_dependencies = 0; |
duke@435 | 117 | bool CodeCache::_needs_cache_clean = false; |
jrose@1424 | 118 | nmethod* CodeCache::_scavenge_root_nmethods = NULL; |
kvn@1637 | 119 | nmethod* CodeCache::_saved_nmethods = NULL; |
duke@435 | 120 | |
duke@435 | 121 | |
duke@435 | 122 | CodeBlob* CodeCache::first() { |
duke@435 | 123 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 124 | return (CodeBlob*)_heap->first(); |
duke@435 | 125 | } |
duke@435 | 126 | |
duke@435 | 127 | |
duke@435 | 128 | CodeBlob* CodeCache::next(CodeBlob* cb) { |
duke@435 | 129 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 130 | return (CodeBlob*)_heap->next(cb); |
duke@435 | 131 | } |
duke@435 | 132 | |
duke@435 | 133 | |
duke@435 | 134 | CodeBlob* CodeCache::alive(CodeBlob *cb) { |
duke@435 | 135 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 136 | while (cb != NULL && !cb->is_alive()) cb = next(cb); |
duke@435 | 137 | return cb; |
duke@435 | 138 | } |
duke@435 | 139 | |
duke@435 | 140 | |
duke@435 | 141 | nmethod* CodeCache::alive_nmethod(CodeBlob* cb) { |
duke@435 | 142 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 143 | while (cb != NULL && (!cb->is_alive() || !cb->is_nmethod())) cb = next(cb); |
duke@435 | 144 | return (nmethod*)cb; |
duke@435 | 145 | } |
duke@435 | 146 | |
never@1893 | 147 | nmethod* CodeCache::first_nmethod() { |
never@1893 | 148 | assert_locked_or_safepoint(CodeCache_lock); |
never@1893 | 149 | CodeBlob* cb = first(); |
never@1893 | 150 | while (cb != NULL && !cb->is_nmethod()) { |
never@1893 | 151 | cb = next(cb); |
never@1893 | 152 | } |
never@1893 | 153 | return (nmethod*)cb; |
never@1893 | 154 | } |
never@1893 | 155 | |
never@1893 | 156 | nmethod* CodeCache::next_nmethod (CodeBlob* cb) { |
never@1893 | 157 | assert_locked_or_safepoint(CodeCache_lock); |
never@1893 | 158 | cb = next(cb); |
never@1893 | 159 | while (cb != NULL && !cb->is_nmethod()) { |
never@1893 | 160 | cb = next(cb); |
never@1893 | 161 | } |
never@1893 | 162 | return (nmethod*)cb; |
never@1893 | 163 | } |
duke@435 | 164 | |
duke@435 | 165 | CodeBlob* CodeCache::allocate(int size) { |
duke@435 | 166 | // Do not seize the CodeCache lock here--if the caller has not |
duke@435 | 167 | // already done so, we are going to lose bigtime, since the code |
duke@435 | 168 | // cache will contain a garbage CodeBlob until the caller can |
duke@435 | 169 | // run the constructor for the CodeBlob subclass he is busy |
duke@435 | 170 | // instantiating. |
duke@435 | 171 | guarantee(size >= 0, "allocation request must be reasonable"); |
duke@435 | 172 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 173 | CodeBlob* cb = NULL; |
duke@435 | 174 | _number_of_blobs++; |
duke@435 | 175 | while (true) { |
duke@435 | 176 | cb = (CodeBlob*)_heap->allocate(size); |
duke@435 | 177 | if (cb != NULL) break; |
duke@435 | 178 | if (!_heap->expand_by(CodeCacheExpansionSize)) { |
duke@435 | 179 | // Expansion failed |
duke@435 | 180 | return NULL; |
duke@435 | 181 | } |
duke@435 | 182 | if (PrintCodeCacheExtension) { |
duke@435 | 183 | ResourceMark rm; |
duke@435 | 184 | tty->print_cr("code cache extended to [" INTPTR_FORMAT ", " INTPTR_FORMAT "] (%d bytes)", |
duke@435 | 185 | (intptr_t)_heap->begin(), (intptr_t)_heap->end(), |
duke@435 | 186 | (address)_heap->end() - (address)_heap->begin()); |
duke@435 | 187 | } |
duke@435 | 188 | } |
duke@435 | 189 | verify_if_often(); |
jrose@1424 | 190 | print_trace("allocation", cb, size); |
duke@435 | 191 | return cb; |
duke@435 | 192 | } |
duke@435 | 193 | |
duke@435 | 194 | void CodeCache::free(CodeBlob* cb) { |
duke@435 | 195 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 196 | verify_if_often(); |
duke@435 | 197 | |
jrose@1424 | 198 | print_trace("free", cb); |
never@1999 | 199 | if (cb->is_nmethod()) { |
never@1999 | 200 | _number_of_nmethods--; |
never@1999 | 201 | if (((nmethod *)cb)->has_dependencies()) { |
never@1999 | 202 | _number_of_nmethods_with_dependencies--; |
never@1999 | 203 | } |
never@1999 | 204 | } |
never@1999 | 205 | if (cb->is_adapter_blob()) { |
never@1999 | 206 | _number_of_adapters--; |
duke@435 | 207 | } |
duke@435 | 208 | _number_of_blobs--; |
duke@435 | 209 | |
duke@435 | 210 | _heap->deallocate(cb); |
duke@435 | 211 | |
duke@435 | 212 | verify_if_often(); |
duke@435 | 213 | assert(_number_of_blobs >= 0, "sanity check"); |
duke@435 | 214 | } |
duke@435 | 215 | |
duke@435 | 216 | |
duke@435 | 217 | void CodeCache::commit(CodeBlob* cb) { |
duke@435 | 218 | // this is called by nmethod::nmethod, which must already own CodeCache_lock |
duke@435 | 219 | assert_locked_or_safepoint(CodeCache_lock); |
never@1999 | 220 | if (cb->is_nmethod()) { |
never@1999 | 221 | _number_of_nmethods++; |
never@1999 | 222 | if (((nmethod *)cb)->has_dependencies()) { |
never@1999 | 223 | _number_of_nmethods_with_dependencies++; |
never@1999 | 224 | } |
duke@435 | 225 | } |
never@1999 | 226 | if (cb->is_adapter_blob()) { |
never@1999 | 227 | _number_of_adapters++; |
never@1999 | 228 | } |
never@1999 | 229 | |
duke@435 | 230 | // flush the hardware I-cache |
twisti@2103 | 231 | ICache::invalidate_range(cb->content_begin(), cb->content_size()); |
duke@435 | 232 | } |
duke@435 | 233 | |
duke@435 | 234 | |
duke@435 | 235 | void CodeCache::flush() { |
duke@435 | 236 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 237 | Unimplemented(); |
duke@435 | 238 | } |
duke@435 | 239 | |
duke@435 | 240 | |
duke@435 | 241 | // Iteration over CodeBlobs |
duke@435 | 242 | |
duke@435 | 243 | #define FOR_ALL_BLOBS(var) for (CodeBlob *var = first() ; var != NULL; var = next(var) ) |
duke@435 | 244 | #define FOR_ALL_ALIVE_BLOBS(var) for (CodeBlob *var = alive(first()); var != NULL; var = alive(next(var))) |
duke@435 | 245 | #define FOR_ALL_ALIVE_NMETHODS(var) for (nmethod *var = alive_nmethod(first()); var != NULL; var = alive_nmethod(next(var))) |
duke@435 | 246 | |
duke@435 | 247 | |
duke@435 | 248 | bool CodeCache::contains(void *p) { |
duke@435 | 249 | // It should be ok to call contains without holding a lock |
duke@435 | 250 | return _heap->contains(p); |
duke@435 | 251 | } |
duke@435 | 252 | |
duke@435 | 253 | |
duke@435 | 254 | // This method is safe to call without holding the CodeCache_lock, as long as a dead codeblob is not |
duke@435 | 255 | // looked up (i.e., one that has been marked for deletion). It only dependes on the _segmap to contain |
duke@435 | 256 | // valid indices, which it will always do, as long as the CodeBlob is not in the process of being recycled. |
duke@435 | 257 | CodeBlob* CodeCache::find_blob(void* start) { |
duke@435 | 258 | CodeBlob* result = find_blob_unsafe(start); |
duke@435 | 259 | if (result == NULL) return NULL; |
duke@435 | 260 | // We could potientially look up non_entrant methods |
duke@435 | 261 | guarantee(!result->is_zombie() || result->is_locked_by_vm() || is_error_reported(), "unsafe access to zombie method"); |
duke@435 | 262 | return result; |
duke@435 | 263 | } |
duke@435 | 264 | |
duke@435 | 265 | nmethod* CodeCache::find_nmethod(void* start) { |
duke@435 | 266 | CodeBlob *cb = find_blob(start); |
duke@435 | 267 | assert(cb == NULL || cb->is_nmethod(), "did not find an nmethod"); |
duke@435 | 268 | return (nmethod*)cb; |
duke@435 | 269 | } |
duke@435 | 270 | |
duke@435 | 271 | |
duke@435 | 272 | void CodeCache::blobs_do(void f(CodeBlob* nm)) { |
duke@435 | 273 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 274 | FOR_ALL_BLOBS(p) { |
duke@435 | 275 | f(p); |
duke@435 | 276 | } |
duke@435 | 277 | } |
duke@435 | 278 | |
duke@435 | 279 | |
duke@435 | 280 | void CodeCache::nmethods_do(void f(nmethod* nm)) { |
duke@435 | 281 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 282 | FOR_ALL_BLOBS(nm) { |
duke@435 | 283 | if (nm->is_nmethod()) f((nmethod*)nm); |
duke@435 | 284 | } |
duke@435 | 285 | } |
duke@435 | 286 | |
duke@435 | 287 | |
duke@435 | 288 | int CodeCache::alignment_unit() { |
duke@435 | 289 | return (int)_heap->alignment_unit(); |
duke@435 | 290 | } |
duke@435 | 291 | |
duke@435 | 292 | |
duke@435 | 293 | int CodeCache::alignment_offset() { |
duke@435 | 294 | return (int)_heap->alignment_offset(); |
duke@435 | 295 | } |
duke@435 | 296 | |
duke@435 | 297 | |
twisti@1918 | 298 | // Mark nmethods for unloading if they contain otherwise unreachable |
twisti@1918 | 299 | // oops. |
duke@435 | 300 | void CodeCache::do_unloading(BoolObjectClosure* is_alive, |
duke@435 | 301 | OopClosure* keep_alive, |
duke@435 | 302 | bool unloading_occurred) { |
duke@435 | 303 | assert_locked_or_safepoint(CodeCache_lock); |
twisti@1918 | 304 | FOR_ALL_ALIVE_NMETHODS(nm) { |
twisti@1918 | 305 | nm->do_unloading(is_alive, keep_alive, unloading_occurred); |
duke@435 | 306 | } |
duke@435 | 307 | } |
duke@435 | 308 | |
jrose@1424 | 309 | void CodeCache::blobs_do(CodeBlobClosure* f) { |
duke@435 | 310 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 311 | FOR_ALL_ALIVE_BLOBS(cb) { |
jrose@1424 | 312 | f->do_code_blob(cb); |
jrose@1424 | 313 | |
jrose@1424 | 314 | #ifdef ASSERT |
jrose@1424 | 315 | if (cb->is_nmethod()) |
jrose@1424 | 316 | ((nmethod*)cb)->verify_scavenge_root_oops(); |
jrose@1424 | 317 | #endif //ASSERT |
duke@435 | 318 | } |
duke@435 | 319 | } |
duke@435 | 320 | |
jrose@1424 | 321 | // Walk the list of methods which might contain non-perm oops. |
jrose@1424 | 322 | void CodeCache::scavenge_root_nmethods_do(CodeBlobClosure* f) { |
jrose@1424 | 323 | assert_locked_or_safepoint(CodeCache_lock); |
jrose@1424 | 324 | debug_only(mark_scavenge_root_nmethods()); |
jrose@1424 | 325 | |
jrose@1424 | 326 | for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { |
jrose@1424 | 327 | debug_only(cur->clear_scavenge_root_marked()); |
jrose@1424 | 328 | assert(cur->scavenge_root_not_marked(), ""); |
jrose@1424 | 329 | assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); |
jrose@1424 | 330 | |
jrose@1424 | 331 | bool is_live = (!cur->is_zombie() && !cur->is_unloaded()); |
jrose@1424 | 332 | #ifndef PRODUCT |
jrose@1424 | 333 | if (TraceScavenge) { |
jrose@1424 | 334 | cur->print_on(tty, is_live ? "scavenge root" : "dead scavenge root"); tty->cr(); |
jrose@1424 | 335 | } |
jrose@1424 | 336 | #endif //PRODUCT |
twisti@1798 | 337 | if (is_live) { |
jrose@1424 | 338 | // Perform cur->oops_do(f), maybe just once per nmethod. |
jrose@1424 | 339 | f->do_code_blob(cur); |
twisti@1798 | 340 | } |
jrose@1424 | 341 | } |
jrose@1424 | 342 | |
jrose@1424 | 343 | // Check for stray marks. |
jrose@1424 | 344 | debug_only(verify_perm_nmethods(NULL)); |
jrose@1424 | 345 | } |
jrose@1424 | 346 | |
jrose@1424 | 347 | void CodeCache::add_scavenge_root_nmethod(nmethod* nm) { |
jrose@1424 | 348 | assert_locked_or_safepoint(CodeCache_lock); |
jrose@1424 | 349 | nm->set_on_scavenge_root_list(); |
jrose@1424 | 350 | nm->set_scavenge_root_link(_scavenge_root_nmethods); |
jrose@1424 | 351 | set_scavenge_root_nmethods(nm); |
jrose@1424 | 352 | print_trace("add_scavenge_root", nm); |
jrose@1424 | 353 | } |
jrose@1424 | 354 | |
jrose@1424 | 355 | void CodeCache::drop_scavenge_root_nmethod(nmethod* nm) { |
jrose@1424 | 356 | assert_locked_or_safepoint(CodeCache_lock); |
jrose@1424 | 357 | print_trace("drop_scavenge_root", nm); |
jrose@1424 | 358 | nmethod* last = NULL; |
jrose@1424 | 359 | nmethod* cur = scavenge_root_nmethods(); |
jrose@1424 | 360 | while (cur != NULL) { |
jrose@1424 | 361 | nmethod* next = cur->scavenge_root_link(); |
jrose@1424 | 362 | if (cur == nm) { |
jrose@1424 | 363 | if (last != NULL) |
jrose@1424 | 364 | last->set_scavenge_root_link(next); |
jrose@1424 | 365 | else set_scavenge_root_nmethods(next); |
jrose@1424 | 366 | nm->set_scavenge_root_link(NULL); |
jrose@1424 | 367 | nm->clear_on_scavenge_root_list(); |
jrose@1424 | 368 | return; |
jrose@1424 | 369 | } |
jrose@1424 | 370 | last = cur; |
jrose@1424 | 371 | cur = next; |
jrose@1424 | 372 | } |
jrose@1424 | 373 | assert(false, "should have been on list"); |
jrose@1424 | 374 | } |
jrose@1424 | 375 | |
jrose@1424 | 376 | void CodeCache::prune_scavenge_root_nmethods() { |
jrose@1424 | 377 | assert_locked_or_safepoint(CodeCache_lock); |
jrose@1424 | 378 | debug_only(mark_scavenge_root_nmethods()); |
jrose@1424 | 379 | |
jrose@1424 | 380 | nmethod* last = NULL; |
jrose@1424 | 381 | nmethod* cur = scavenge_root_nmethods(); |
jrose@1424 | 382 | while (cur != NULL) { |
jrose@1424 | 383 | nmethod* next = cur->scavenge_root_link(); |
jrose@1424 | 384 | debug_only(cur->clear_scavenge_root_marked()); |
jrose@1424 | 385 | assert(cur->scavenge_root_not_marked(), ""); |
jrose@1424 | 386 | assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); |
jrose@1424 | 387 | |
jrose@1424 | 388 | if (!cur->is_zombie() && !cur->is_unloaded() |
jrose@1424 | 389 | && cur->detect_scavenge_root_oops()) { |
jrose@1424 | 390 | // Keep it. Advance 'last' to prevent deletion. |
jrose@1424 | 391 | last = cur; |
jrose@1424 | 392 | } else { |
jrose@1424 | 393 | // Prune it from the list, so we don't have to look at it any more. |
jrose@1424 | 394 | print_trace("prune_scavenge_root", cur); |
jrose@1424 | 395 | cur->set_scavenge_root_link(NULL); |
jrose@1424 | 396 | cur->clear_on_scavenge_root_list(); |
jrose@1424 | 397 | if (last != NULL) |
jrose@1424 | 398 | last->set_scavenge_root_link(next); |
jrose@1424 | 399 | else set_scavenge_root_nmethods(next); |
jrose@1424 | 400 | } |
jrose@1424 | 401 | cur = next; |
jrose@1424 | 402 | } |
jrose@1424 | 403 | |
jrose@1424 | 404 | // Check for stray marks. |
jrose@1424 | 405 | debug_only(verify_perm_nmethods(NULL)); |
jrose@1424 | 406 | } |
jrose@1424 | 407 | |
jrose@1424 | 408 | #ifndef PRODUCT |
jrose@1424 | 409 | void CodeCache::asserted_non_scavengable_nmethods_do(CodeBlobClosure* f) { |
jrose@1424 | 410 | // While we are here, verify the integrity of the list. |
jrose@1424 | 411 | mark_scavenge_root_nmethods(); |
jrose@1424 | 412 | for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { |
jrose@1424 | 413 | assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); |
jrose@1424 | 414 | cur->clear_scavenge_root_marked(); |
jrose@1424 | 415 | } |
jrose@1424 | 416 | verify_perm_nmethods(f); |
jrose@1424 | 417 | } |
jrose@1424 | 418 | |
jrose@1424 | 419 | // Temporarily mark nmethods that are claimed to be on the non-perm list. |
jrose@1424 | 420 | void CodeCache::mark_scavenge_root_nmethods() { |
jrose@1424 | 421 | FOR_ALL_ALIVE_BLOBS(cb) { |
jrose@1424 | 422 | if (cb->is_nmethod()) { |
jrose@1424 | 423 | nmethod *nm = (nmethod*)cb; |
jrose@1424 | 424 | assert(nm->scavenge_root_not_marked(), "clean state"); |
jrose@1424 | 425 | if (nm->on_scavenge_root_list()) |
jrose@1424 | 426 | nm->set_scavenge_root_marked(); |
jrose@1424 | 427 | } |
jrose@1424 | 428 | } |
jrose@1424 | 429 | } |
jrose@1424 | 430 | |
jrose@1424 | 431 | // If the closure is given, run it on the unlisted nmethods. |
jrose@1424 | 432 | // Also make sure that the effects of mark_scavenge_root_nmethods is gone. |
jrose@1424 | 433 | void CodeCache::verify_perm_nmethods(CodeBlobClosure* f_or_null) { |
jrose@1424 | 434 | FOR_ALL_ALIVE_BLOBS(cb) { |
jrose@1424 | 435 | bool call_f = (f_or_null != NULL); |
jrose@1424 | 436 | if (cb->is_nmethod()) { |
jrose@1424 | 437 | nmethod *nm = (nmethod*)cb; |
jrose@1424 | 438 | assert(nm->scavenge_root_not_marked(), "must be already processed"); |
jrose@1424 | 439 | if (nm->on_scavenge_root_list()) |
jrose@1424 | 440 | call_f = false; // don't show this one to the client |
jrose@1424 | 441 | nm->verify_scavenge_root_oops(); |
jrose@1424 | 442 | } else { |
jrose@1424 | 443 | call_f = false; // not an nmethod |
jrose@1424 | 444 | } |
jrose@1424 | 445 | if (call_f) f_or_null->do_code_blob(cb); |
jrose@1424 | 446 | } |
jrose@1424 | 447 | } |
jrose@1424 | 448 | #endif //PRODUCT |
jrose@1424 | 449 | |
kvn@1637 | 450 | |
kvn@1637 | 451 | nmethod* CodeCache::find_and_remove_saved_code(methodOop m) { |
kvn@1637 | 452 | MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
kvn@1637 | 453 | nmethod* saved = _saved_nmethods; |
kvn@1637 | 454 | nmethod* prev = NULL; |
kvn@1637 | 455 | while (saved != NULL) { |
kvn@1637 | 456 | if (saved->is_in_use() && saved->method() == m) { |
kvn@1637 | 457 | if (prev != NULL) { |
kvn@1637 | 458 | prev->set_saved_nmethod_link(saved->saved_nmethod_link()); |
kvn@1637 | 459 | } else { |
kvn@1637 | 460 | _saved_nmethods = saved->saved_nmethod_link(); |
kvn@1637 | 461 | } |
kvn@1637 | 462 | assert(saved->is_speculatively_disconnected(), "shouldn't call for other nmethods"); |
kvn@1637 | 463 | saved->set_speculatively_disconnected(false); |
kvn@1637 | 464 | saved->set_saved_nmethod_link(NULL); |
kvn@1637 | 465 | if (PrintMethodFlushing) { |
never@1893 | 466 | saved->print_on(tty, " ### nmethod is reconnected\n"); |
kvn@1637 | 467 | } |
kvn@1637 | 468 | if (LogCompilation && (xtty != NULL)) { |
kvn@1637 | 469 | ttyLocker ttyl; |
kvn@1637 | 470 | xtty->begin_elem("nmethod_reconnected compile_id='%3d'", saved->compile_id()); |
kvn@1637 | 471 | xtty->method(methodOop(m)); |
kvn@1637 | 472 | xtty->stamp(); |
kvn@1637 | 473 | xtty->end_elem(); |
kvn@1637 | 474 | } |
kvn@1637 | 475 | return saved; |
kvn@1637 | 476 | } |
kvn@1637 | 477 | prev = saved; |
kvn@1637 | 478 | saved = saved->saved_nmethod_link(); |
kvn@1637 | 479 | } |
kvn@1637 | 480 | return NULL; |
kvn@1637 | 481 | } |
kvn@1637 | 482 | |
kvn@1637 | 483 | void CodeCache::remove_saved_code(nmethod* nm) { |
never@1893 | 484 | // For conc swpr this will be called with CodeCache_lock taken by caller |
never@1893 | 485 | assert_locked_or_safepoint(CodeCache_lock); |
kvn@1637 | 486 | assert(nm->is_speculatively_disconnected(), "shouldn't call for other nmethods"); |
kvn@1637 | 487 | nmethod* saved = _saved_nmethods; |
kvn@1637 | 488 | nmethod* prev = NULL; |
kvn@1637 | 489 | while (saved != NULL) { |
kvn@1637 | 490 | if (saved == nm) { |
kvn@1637 | 491 | if (prev != NULL) { |
kvn@1637 | 492 | prev->set_saved_nmethod_link(saved->saved_nmethod_link()); |
kvn@1637 | 493 | } else { |
kvn@1637 | 494 | _saved_nmethods = saved->saved_nmethod_link(); |
kvn@1637 | 495 | } |
kvn@1637 | 496 | if (LogCompilation && (xtty != NULL)) { |
kvn@1637 | 497 | ttyLocker ttyl; |
kvn@1637 | 498 | xtty->begin_elem("nmethod_removed compile_id='%3d'", nm->compile_id()); |
kvn@1637 | 499 | xtty->stamp(); |
kvn@1637 | 500 | xtty->end_elem(); |
kvn@1637 | 501 | } |
kvn@1637 | 502 | return; |
kvn@1637 | 503 | } |
kvn@1637 | 504 | prev = saved; |
kvn@1637 | 505 | saved = saved->saved_nmethod_link(); |
kvn@1637 | 506 | } |
kvn@1637 | 507 | ShouldNotReachHere(); |
kvn@1637 | 508 | } |
kvn@1637 | 509 | |
kvn@1637 | 510 | void CodeCache::speculatively_disconnect(nmethod* nm) { |
kvn@1637 | 511 | assert_locked_or_safepoint(CodeCache_lock); |
kvn@1637 | 512 | assert(nm->is_in_use() && !nm->is_speculatively_disconnected(), "should only disconnect live nmethods"); |
kvn@1637 | 513 | nm->set_saved_nmethod_link(_saved_nmethods); |
kvn@1637 | 514 | _saved_nmethods = nm; |
kvn@1637 | 515 | if (PrintMethodFlushing) { |
never@1893 | 516 | nm->print_on(tty, " ### nmethod is speculatively disconnected\n"); |
kvn@1637 | 517 | } |
kvn@1637 | 518 | if (LogCompilation && (xtty != NULL)) { |
kvn@1637 | 519 | ttyLocker ttyl; |
kvn@1637 | 520 | xtty->begin_elem("nmethod_disconnected compile_id='%3d'", nm->compile_id()); |
kvn@1637 | 521 | xtty->method(methodOop(nm->method())); |
kvn@1637 | 522 | xtty->stamp(); |
kvn@1637 | 523 | xtty->end_elem(); |
kvn@1637 | 524 | } |
kvn@1637 | 525 | nm->method()->clear_code(); |
kvn@1637 | 526 | nm->set_speculatively_disconnected(true); |
kvn@1637 | 527 | } |
kvn@1637 | 528 | |
kvn@1637 | 529 | |
duke@435 | 530 | void CodeCache::gc_prologue() { |
jrose@1424 | 531 | assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_epilogue must be called"); |
duke@435 | 532 | } |
duke@435 | 533 | |
duke@435 | 534 | |
duke@435 | 535 | void CodeCache::gc_epilogue() { |
duke@435 | 536 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 537 | FOR_ALL_ALIVE_BLOBS(cb) { |
duke@435 | 538 | if (cb->is_nmethod()) { |
duke@435 | 539 | nmethod *nm = (nmethod*)cb; |
duke@435 | 540 | assert(!nm->is_unloaded(), "Tautology"); |
duke@435 | 541 | if (needs_cache_clean()) { |
duke@435 | 542 | nm->cleanup_inline_caches(); |
duke@435 | 543 | } |
twisti@1918 | 544 | DEBUG_ONLY(nm->verify()); |
twisti@1918 | 545 | nm->fix_oop_relocations(); |
duke@435 | 546 | } |
duke@435 | 547 | } |
duke@435 | 548 | set_needs_cache_clean(false); |
jrose@1424 | 549 | prune_scavenge_root_nmethods(); |
jrose@1424 | 550 | assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
duke@435 | 551 | } |
duke@435 | 552 | |
duke@435 | 553 | |
never@2657 | 554 | void CodeCache::verify_oops() { |
never@2657 | 555 | MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
never@2657 | 556 | VerifyOopClosure voc; |
never@2657 | 557 | FOR_ALL_ALIVE_BLOBS(cb) { |
never@2657 | 558 | if (cb->is_nmethod()) { |
never@2657 | 559 | nmethod *nm = (nmethod*)cb; |
never@2657 | 560 | nm->oops_do(&voc); |
never@2657 | 561 | nm->verify_oop_relocations(); |
never@2657 | 562 | } |
never@2657 | 563 | } |
never@2657 | 564 | } |
never@2657 | 565 | |
never@2657 | 566 | |
duke@435 | 567 | address CodeCache::first_address() { |
duke@435 | 568 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 569 | return (address)_heap->begin(); |
duke@435 | 570 | } |
duke@435 | 571 | |
duke@435 | 572 | |
duke@435 | 573 | address CodeCache::last_address() { |
duke@435 | 574 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 575 | return (address)_heap->end(); |
duke@435 | 576 | } |
duke@435 | 577 | |
duke@435 | 578 | |
duke@435 | 579 | void icache_init(); |
duke@435 | 580 | |
duke@435 | 581 | void CodeCache::initialize() { |
duke@435 | 582 | assert(CodeCacheSegmentSize >= (uintx)CodeEntryAlignment, "CodeCacheSegmentSize must be large enough to align entry points"); |
duke@435 | 583 | #ifdef COMPILER2 |
duke@435 | 584 | assert(CodeCacheSegmentSize >= (uintx)OptoLoopAlignment, "CodeCacheSegmentSize must be large enough to align inner loops"); |
duke@435 | 585 | #endif |
duke@435 | 586 | assert(CodeCacheSegmentSize >= sizeof(jdouble), "CodeCacheSegmentSize must be large enough to align constants"); |
duke@435 | 587 | // This was originally just a check of the alignment, causing failure, instead, round |
duke@435 | 588 | // the code cache to the page size. In particular, Solaris is moving to a larger |
duke@435 | 589 | // default page size. |
duke@435 | 590 | CodeCacheExpansionSize = round_to(CodeCacheExpansionSize, os::vm_page_size()); |
duke@435 | 591 | InitialCodeCacheSize = round_to(InitialCodeCacheSize, os::vm_page_size()); |
duke@435 | 592 | ReservedCodeCacheSize = round_to(ReservedCodeCacheSize, os::vm_page_size()); |
duke@435 | 593 | if (!_heap->reserve(ReservedCodeCacheSize, InitialCodeCacheSize, CodeCacheSegmentSize)) { |
duke@435 | 594 | vm_exit_during_initialization("Could not reserve enough space for code cache"); |
duke@435 | 595 | } |
duke@435 | 596 | |
duke@435 | 597 | MemoryService::add_code_heap_memory_pool(_heap); |
duke@435 | 598 | |
duke@435 | 599 | // Initialize ICache flush mechanism |
duke@435 | 600 | // This service is needed for os::register_code_area |
duke@435 | 601 | icache_init(); |
duke@435 | 602 | |
duke@435 | 603 | // Give OS a chance to register generated code area. |
duke@435 | 604 | // This is used on Windows 64 bit platforms to register |
duke@435 | 605 | // Structured Exception Handlers for our generated code. |
duke@435 | 606 | os::register_code_area(_heap->low_boundary(), _heap->high_boundary()); |
duke@435 | 607 | } |
duke@435 | 608 | |
duke@435 | 609 | |
duke@435 | 610 | void codeCache_init() { |
duke@435 | 611 | CodeCache::initialize(); |
duke@435 | 612 | } |
duke@435 | 613 | |
duke@435 | 614 | //------------------------------------------------------------------------------------------------ |
duke@435 | 615 | |
duke@435 | 616 | int CodeCache::number_of_nmethods_with_dependencies() { |
duke@435 | 617 | return _number_of_nmethods_with_dependencies; |
duke@435 | 618 | } |
duke@435 | 619 | |
duke@435 | 620 | void CodeCache::clear_inline_caches() { |
duke@435 | 621 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 622 | FOR_ALL_ALIVE_NMETHODS(nm) { |
duke@435 | 623 | nm->clear_inline_caches(); |
duke@435 | 624 | } |
duke@435 | 625 | } |
duke@435 | 626 | |
duke@435 | 627 | #ifndef PRODUCT |
duke@435 | 628 | // used to keep track of how much time is spent in mark_for_deoptimization |
duke@435 | 629 | static elapsedTimer dependentCheckTime; |
duke@435 | 630 | static int dependentCheckCount = 0; |
duke@435 | 631 | #endif // PRODUCT |
duke@435 | 632 | |
duke@435 | 633 | |
duke@435 | 634 | int CodeCache::mark_for_deoptimization(DepChange& changes) { |
duke@435 | 635 | MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
duke@435 | 636 | |
duke@435 | 637 | #ifndef PRODUCT |
duke@435 | 638 | dependentCheckTime.start(); |
duke@435 | 639 | dependentCheckCount++; |
duke@435 | 640 | #endif // PRODUCT |
duke@435 | 641 | |
duke@435 | 642 | int number_of_marked_CodeBlobs = 0; |
duke@435 | 643 | |
duke@435 | 644 | // search the hierarchy looking for nmethods which are affected by the loading of this class |
duke@435 | 645 | |
duke@435 | 646 | // then search the interfaces this class implements looking for nmethods |
duke@435 | 647 | // which might be dependent of the fact that an interface only had one |
duke@435 | 648 | // implementor. |
duke@435 | 649 | |
duke@435 | 650 | { No_Safepoint_Verifier nsv; |
duke@435 | 651 | for (DepChange::ContextStream str(changes, nsv); str.next(); ) { |
duke@435 | 652 | klassOop d = str.klass(); |
duke@435 | 653 | number_of_marked_CodeBlobs += instanceKlass::cast(d)->mark_dependent_nmethods(changes); |
duke@435 | 654 | } |
duke@435 | 655 | } |
duke@435 | 656 | |
duke@435 | 657 | if (VerifyDependencies) { |
duke@435 | 658 | // Turn off dependency tracing while actually testing deps. |
duke@435 | 659 | NOT_PRODUCT( FlagSetting fs(TraceDependencies, false) ); |
duke@435 | 660 | FOR_ALL_ALIVE_NMETHODS(nm) { |
duke@435 | 661 | if (!nm->is_marked_for_deoptimization() && |
duke@435 | 662 | nm->check_all_dependencies()) { |
duke@435 | 663 | ResourceMark rm; |
duke@435 | 664 | tty->print_cr("Should have been marked for deoptimization:"); |
duke@435 | 665 | changes.print(); |
duke@435 | 666 | nm->print(); |
duke@435 | 667 | nm->print_dependencies(); |
duke@435 | 668 | } |
duke@435 | 669 | } |
duke@435 | 670 | } |
duke@435 | 671 | |
duke@435 | 672 | #ifndef PRODUCT |
duke@435 | 673 | dependentCheckTime.stop(); |
duke@435 | 674 | #endif // PRODUCT |
duke@435 | 675 | |
duke@435 | 676 | return number_of_marked_CodeBlobs; |
duke@435 | 677 | } |
duke@435 | 678 | |
duke@435 | 679 | |
duke@435 | 680 | #ifdef HOTSWAP |
duke@435 | 681 | int CodeCache::mark_for_evol_deoptimization(instanceKlassHandle dependee) { |
duke@435 | 682 | MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
duke@435 | 683 | int number_of_marked_CodeBlobs = 0; |
duke@435 | 684 | |
duke@435 | 685 | // Deoptimize all methods of the evolving class itself |
duke@435 | 686 | objArrayOop old_methods = dependee->methods(); |
duke@435 | 687 | for (int i = 0; i < old_methods->length(); i++) { |
duke@435 | 688 | ResourceMark rm; |
duke@435 | 689 | methodOop old_method = (methodOop) old_methods->obj_at(i); |
duke@435 | 690 | nmethod *nm = old_method->code(); |
duke@435 | 691 | if (nm != NULL) { |
duke@435 | 692 | nm->mark_for_deoptimization(); |
duke@435 | 693 | number_of_marked_CodeBlobs++; |
duke@435 | 694 | } |
duke@435 | 695 | } |
duke@435 | 696 | |
duke@435 | 697 | FOR_ALL_ALIVE_NMETHODS(nm) { |
duke@435 | 698 | if (nm->is_marked_for_deoptimization()) { |
duke@435 | 699 | // ...Already marked in the previous pass; don't count it again. |
duke@435 | 700 | } else if (nm->is_evol_dependent_on(dependee())) { |
duke@435 | 701 | ResourceMark rm; |
duke@435 | 702 | nm->mark_for_deoptimization(); |
duke@435 | 703 | number_of_marked_CodeBlobs++; |
duke@435 | 704 | } else { |
duke@435 | 705 | // flush caches in case they refer to a redefined methodOop |
duke@435 | 706 | nm->clear_inline_caches(); |
duke@435 | 707 | } |
duke@435 | 708 | } |
duke@435 | 709 | |
duke@435 | 710 | return number_of_marked_CodeBlobs; |
duke@435 | 711 | } |
duke@435 | 712 | #endif // HOTSWAP |
duke@435 | 713 | |
duke@435 | 714 | |
duke@435 | 715 | // Deoptimize all methods |
duke@435 | 716 | void CodeCache::mark_all_nmethods_for_deoptimization() { |
duke@435 | 717 | MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
duke@435 | 718 | FOR_ALL_ALIVE_NMETHODS(nm) { |
duke@435 | 719 | nm->mark_for_deoptimization(); |
duke@435 | 720 | } |
duke@435 | 721 | } |
duke@435 | 722 | |
duke@435 | 723 | |
duke@435 | 724 | int CodeCache::mark_for_deoptimization(methodOop dependee) { |
duke@435 | 725 | MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
duke@435 | 726 | int number_of_marked_CodeBlobs = 0; |
duke@435 | 727 | |
duke@435 | 728 | FOR_ALL_ALIVE_NMETHODS(nm) { |
duke@435 | 729 | if (nm->is_dependent_on_method(dependee)) { |
duke@435 | 730 | ResourceMark rm; |
duke@435 | 731 | nm->mark_for_deoptimization(); |
duke@435 | 732 | number_of_marked_CodeBlobs++; |
duke@435 | 733 | } |
duke@435 | 734 | } |
duke@435 | 735 | |
duke@435 | 736 | return number_of_marked_CodeBlobs; |
duke@435 | 737 | } |
duke@435 | 738 | |
duke@435 | 739 | void CodeCache::make_marked_nmethods_zombies() { |
duke@435 | 740 | assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); |
duke@435 | 741 | FOR_ALL_ALIVE_NMETHODS(nm) { |
duke@435 | 742 | if (nm->is_marked_for_deoptimization()) { |
duke@435 | 743 | |
duke@435 | 744 | // If the nmethod has already been made non-entrant and it can be converted |
duke@435 | 745 | // then zombie it now. Otherwise make it non-entrant and it will eventually |
duke@435 | 746 | // be zombied when it is no longer seen on the stack. Note that the nmethod |
duke@435 | 747 | // might be "entrant" and not on the stack and so could be zombied immediately |
duke@435 | 748 | // but we can't tell because we don't track it on stack until it becomes |
duke@435 | 749 | // non-entrant. |
duke@435 | 750 | |
duke@435 | 751 | if (nm->is_not_entrant() && nm->can_not_entrant_be_converted()) { |
duke@435 | 752 | nm->make_zombie(); |
duke@435 | 753 | } else { |
duke@435 | 754 | nm->make_not_entrant(); |
duke@435 | 755 | } |
duke@435 | 756 | } |
duke@435 | 757 | } |
duke@435 | 758 | } |
duke@435 | 759 | |
duke@435 | 760 | void CodeCache::make_marked_nmethods_not_entrant() { |
duke@435 | 761 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 762 | FOR_ALL_ALIVE_NMETHODS(nm) { |
duke@435 | 763 | if (nm->is_marked_for_deoptimization()) { |
duke@435 | 764 | nm->make_not_entrant(); |
duke@435 | 765 | } |
duke@435 | 766 | } |
duke@435 | 767 | } |
duke@435 | 768 | |
duke@435 | 769 | void CodeCache::verify() { |
duke@435 | 770 | _heap->verify(); |
duke@435 | 771 | FOR_ALL_ALIVE_BLOBS(p) { |
duke@435 | 772 | p->verify(); |
duke@435 | 773 | } |
duke@435 | 774 | } |
duke@435 | 775 | |
duke@435 | 776 | //------------------------------------------------------------------------------------------------ |
duke@435 | 777 | // Non-product version |
duke@435 | 778 | |
duke@435 | 779 | #ifndef PRODUCT |
duke@435 | 780 | |
duke@435 | 781 | void CodeCache::verify_if_often() { |
duke@435 | 782 | if (VerifyCodeCacheOften) { |
duke@435 | 783 | _heap->verify(); |
duke@435 | 784 | } |
duke@435 | 785 | } |
duke@435 | 786 | |
jrose@1424 | 787 | void CodeCache::print_trace(const char* event, CodeBlob* cb, int size) { |
jrose@1424 | 788 | if (PrintCodeCache2) { // Need to add a new flag |
jrose@1424 | 789 | ResourceMark rm; |
jrose@1424 | 790 | if (size == 0) size = cb->size(); |
jrose@1424 | 791 | tty->print_cr("CodeCache %s: addr: " INTPTR_FORMAT ", size: 0x%x", event, cb, size); |
jrose@1424 | 792 | } |
jrose@1424 | 793 | } |
jrose@1424 | 794 | |
duke@435 | 795 | void CodeCache::print_internals() { |
duke@435 | 796 | int nmethodCount = 0; |
duke@435 | 797 | int runtimeStubCount = 0; |
duke@435 | 798 | int adapterCount = 0; |
duke@435 | 799 | int deoptimizationStubCount = 0; |
duke@435 | 800 | int uncommonTrapStubCount = 0; |
duke@435 | 801 | int bufferBlobCount = 0; |
duke@435 | 802 | int total = 0; |
duke@435 | 803 | int nmethodAlive = 0; |
duke@435 | 804 | int nmethodNotEntrant = 0; |
duke@435 | 805 | int nmethodZombie = 0; |
duke@435 | 806 | int nmethodUnloaded = 0; |
duke@435 | 807 | int nmethodJava = 0; |
duke@435 | 808 | int nmethodNative = 0; |
duke@435 | 809 | int maxCodeSize = 0; |
duke@435 | 810 | ResourceMark rm; |
duke@435 | 811 | |
duke@435 | 812 | CodeBlob *cb; |
duke@435 | 813 | for (cb = first(); cb != NULL; cb = next(cb)) { |
duke@435 | 814 | total++; |
duke@435 | 815 | if (cb->is_nmethod()) { |
duke@435 | 816 | nmethod* nm = (nmethod*)cb; |
duke@435 | 817 | |
duke@435 | 818 | if (Verbose && nm->method() != NULL) { |
duke@435 | 819 | ResourceMark rm; |
duke@435 | 820 | char *method_name = nm->method()->name_and_sig_as_C_string(); |
duke@435 | 821 | tty->print("%s", method_name); |
duke@435 | 822 | if(nm->is_alive()) { tty->print_cr(" alive"); } |
duke@435 | 823 | if(nm->is_not_entrant()) { tty->print_cr(" not-entrant"); } |
duke@435 | 824 | if(nm->is_zombie()) { tty->print_cr(" zombie"); } |
duke@435 | 825 | } |
duke@435 | 826 | |
duke@435 | 827 | nmethodCount++; |
duke@435 | 828 | |
duke@435 | 829 | if(nm->is_alive()) { nmethodAlive++; } |
duke@435 | 830 | if(nm->is_not_entrant()) { nmethodNotEntrant++; } |
duke@435 | 831 | if(nm->is_zombie()) { nmethodZombie++; } |
duke@435 | 832 | if(nm->is_unloaded()) { nmethodUnloaded++; } |
duke@435 | 833 | if(nm->is_native_method()) { nmethodNative++; } |
duke@435 | 834 | |
duke@435 | 835 | if(nm->method() != NULL && nm->is_java_method()) { |
duke@435 | 836 | nmethodJava++; |
twisti@2103 | 837 | if (nm->insts_size() > maxCodeSize) { |
twisti@2103 | 838 | maxCodeSize = nm->insts_size(); |
duke@435 | 839 | } |
duke@435 | 840 | } |
duke@435 | 841 | } else if (cb->is_runtime_stub()) { |
duke@435 | 842 | runtimeStubCount++; |
duke@435 | 843 | } else if (cb->is_deoptimization_stub()) { |
duke@435 | 844 | deoptimizationStubCount++; |
duke@435 | 845 | } else if (cb->is_uncommon_trap_stub()) { |
duke@435 | 846 | uncommonTrapStubCount++; |
duke@435 | 847 | } else if (cb->is_adapter_blob()) { |
duke@435 | 848 | adapterCount++; |
duke@435 | 849 | } else if (cb->is_buffer_blob()) { |
duke@435 | 850 | bufferBlobCount++; |
duke@435 | 851 | } |
duke@435 | 852 | } |
duke@435 | 853 | |
duke@435 | 854 | int bucketSize = 512; |
duke@435 | 855 | int bucketLimit = maxCodeSize / bucketSize + 1; |
duke@435 | 856 | int *buckets = NEW_C_HEAP_ARRAY(int, bucketLimit); |
duke@435 | 857 | memset(buckets,0,sizeof(int) * bucketLimit); |
duke@435 | 858 | |
duke@435 | 859 | for (cb = first(); cb != NULL; cb = next(cb)) { |
duke@435 | 860 | if (cb->is_nmethod()) { |
duke@435 | 861 | nmethod* nm = (nmethod*)cb; |
duke@435 | 862 | if(nm->is_java_method()) { |
twisti@2103 | 863 | buckets[nm->insts_size() / bucketSize]++; |
duke@435 | 864 | } |
duke@435 | 865 | } |
duke@435 | 866 | } |
duke@435 | 867 | tty->print_cr("Code Cache Entries (total of %d)",total); |
duke@435 | 868 | tty->print_cr("-------------------------------------------------"); |
duke@435 | 869 | tty->print_cr("nmethods: %d",nmethodCount); |
duke@435 | 870 | tty->print_cr("\talive: %d",nmethodAlive); |
duke@435 | 871 | tty->print_cr("\tnot_entrant: %d",nmethodNotEntrant); |
duke@435 | 872 | tty->print_cr("\tzombie: %d",nmethodZombie); |
duke@435 | 873 | tty->print_cr("\tunloaded: %d",nmethodUnloaded); |
duke@435 | 874 | tty->print_cr("\tjava: %d",nmethodJava); |
duke@435 | 875 | tty->print_cr("\tnative: %d",nmethodNative); |
duke@435 | 876 | tty->print_cr("runtime_stubs: %d",runtimeStubCount); |
duke@435 | 877 | tty->print_cr("adapters: %d",adapterCount); |
duke@435 | 878 | tty->print_cr("buffer blobs: %d",bufferBlobCount); |
duke@435 | 879 | tty->print_cr("deoptimization_stubs: %d",deoptimizationStubCount); |
duke@435 | 880 | tty->print_cr("uncommon_traps: %d",uncommonTrapStubCount); |
duke@435 | 881 | tty->print_cr("\nnmethod size distribution (non-zombie java)"); |
duke@435 | 882 | tty->print_cr("-------------------------------------------------"); |
duke@435 | 883 | |
duke@435 | 884 | for(int i=0; i<bucketLimit; i++) { |
duke@435 | 885 | if(buckets[i] != 0) { |
duke@435 | 886 | tty->print("%d - %d bytes",i*bucketSize,(i+1)*bucketSize); |
duke@435 | 887 | tty->fill_to(40); |
duke@435 | 888 | tty->print_cr("%d",buckets[i]); |
duke@435 | 889 | } |
duke@435 | 890 | } |
duke@435 | 891 | |
duke@435 | 892 | FREE_C_HEAP_ARRAY(int, buckets); |
duke@435 | 893 | } |
duke@435 | 894 | |
duke@435 | 895 | void CodeCache::print() { |
duke@435 | 896 | CodeBlob_sizes live; |
duke@435 | 897 | CodeBlob_sizes dead; |
duke@435 | 898 | |
duke@435 | 899 | FOR_ALL_BLOBS(p) { |
duke@435 | 900 | if (!p->is_alive()) { |
duke@435 | 901 | dead.add(p); |
duke@435 | 902 | } else { |
duke@435 | 903 | live.add(p); |
duke@435 | 904 | } |
duke@435 | 905 | } |
duke@435 | 906 | |
duke@435 | 907 | tty->print_cr("CodeCache:"); |
duke@435 | 908 | |
duke@435 | 909 | tty->print_cr("nmethod dependency checking time %f", dependentCheckTime.seconds(), |
duke@435 | 910 | dependentCheckTime.seconds() / dependentCheckCount); |
duke@435 | 911 | |
duke@435 | 912 | if (!live.is_empty()) { |
duke@435 | 913 | live.print("live"); |
duke@435 | 914 | } |
duke@435 | 915 | if (!dead.is_empty()) { |
duke@435 | 916 | dead.print("dead"); |
duke@435 | 917 | } |
duke@435 | 918 | |
duke@435 | 919 | |
duke@435 | 920 | if (Verbose) { |
duke@435 | 921 | // print the oop_map usage |
duke@435 | 922 | int code_size = 0; |
duke@435 | 923 | int number_of_blobs = 0; |
duke@435 | 924 | int number_of_oop_maps = 0; |
duke@435 | 925 | int map_size = 0; |
duke@435 | 926 | FOR_ALL_BLOBS(p) { |
duke@435 | 927 | if (p->is_alive()) { |
duke@435 | 928 | number_of_blobs++; |
twisti@2103 | 929 | code_size += p->code_size(); |
duke@435 | 930 | OopMapSet* set = p->oop_maps(); |
duke@435 | 931 | if (set != NULL) { |
duke@435 | 932 | number_of_oop_maps += set->size(); |
twisti@2103 | 933 | map_size += set->heap_size(); |
duke@435 | 934 | } |
duke@435 | 935 | } |
duke@435 | 936 | } |
duke@435 | 937 | tty->print_cr("OopMaps"); |
duke@435 | 938 | tty->print_cr(" #blobs = %d", number_of_blobs); |
duke@435 | 939 | tty->print_cr(" code size = %d", code_size); |
duke@435 | 940 | tty->print_cr(" #oop_maps = %d", number_of_oop_maps); |
duke@435 | 941 | tty->print_cr(" map size = %d", map_size); |
duke@435 | 942 | } |
duke@435 | 943 | |
duke@435 | 944 | } |
duke@435 | 945 | |
duke@435 | 946 | #endif // PRODUCT |
never@2262 | 947 | |
never@2262 | 948 | void CodeCache::print_bounds(outputStream* st) { |
never@2262 | 949 | st->print_cr("Code Cache [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
never@2262 | 950 | _heap->low_boundary(), |
never@2262 | 951 | _heap->high(), |
never@2262 | 952 | _heap->high_boundary()); |
never@2262 | 953 | st->print_cr(" total_blobs=" UINT32_FORMAT " nmethods=" UINT32_FORMAT |
kvn@2635 | 954 | " adapters=" UINT32_FORMAT " free_code_cache=" SIZE_FORMAT "Kb" |
kvn@2414 | 955 | " largest_free_block=" SIZE_FORMAT, |
kvn@2635 | 956 | nof_blobs(), nof_nmethods(), nof_adapters(), |
kvn@2635 | 957 | unallocated_capacity()/K, largest_free_block()); |
never@2262 | 958 | } |
kvn@2635 | 959 | |
kvn@2635 | 960 | void CodeCache::log_state(outputStream* st) { |
kvn@2635 | 961 | st->print(" total_blobs='" UINT32_FORMAT "' nmethods='" UINT32_FORMAT "'" |
kvn@2635 | 962 | " adapters='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'" |
kvn@2635 | 963 | " largest_free_block='" SIZE_FORMAT "'", |
kvn@2635 | 964 | nof_blobs(), nof_nmethods(), nof_adapters(), |
kvn@2635 | 965 | unallocated_capacity(), largest_free_block()); |
kvn@2635 | 966 | } |
never@2739 | 967 | |
never@2739 | 968 | size_t CodeCache::largest_free_block() { |
never@2739 | 969 | // This is called both with and without CodeCache_lock held so |
never@2739 | 970 | // handle both cases. |
never@2739 | 971 | if (CodeCache_lock->owned_by_self()) { |
never@2739 | 972 | return _heap->largest_free_block(); |
never@2739 | 973 | } else { |
never@2739 | 974 | MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
never@2739 | 975 | return _heap->largest_free_block(); |
never@2739 | 976 | } |
never@2739 | 977 | } |