1 /* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "code/codeBlob.hpp" 27 #include "code/codeCache.hpp" 28 #include "code/compiledIC.hpp" 29 #include "code/dependencies.hpp" 30 #include "code/icBuffer.hpp" 31 #include "code/nmethod.hpp" 32 #include "code/pcDesc.hpp" 33 #include "compiler/compileBroker.hpp" 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" 39 #include "oops/method.hpp" 40 #include "oops/objArrayOop.hpp" 41 #include "oops/oop.inline.hpp" 42 #include "runtime/handles.inline.hpp" 43 #include "runtime/arguments.hpp" 44 #include "runtime/icache.hpp" 45 #include "runtime/java.hpp" 46 #include "runtime/mutexLocker.hpp" 47 #include "runtime/compilationPolicy.hpp" 48 #include "services/memoryService.hpp" 49 #include "trace/tracing.hpp" 50 #include "utilities/xmlstream.hpp" 51 #ifdef COMPILER1 52 #include "c1/c1_Compilation.hpp" 53 #include "c1/c1_Compiler.hpp" 54 #endif 55 #ifdef COMPILER2 56 #include "opto/c2compiler.hpp" 57 #include "opto/compile.hpp" 58 #include "opto/node.hpp" 59 #endif 60 61 // Helper class for printing in CodeCache 62 class CodeBlob_sizes { 63 private: 64 int count; 65 int total_size; 66 int header_size; 67 int code_size; 68 int stub_size; 69 int relocation_size; 70 int scopes_oop_size; 71 int scopes_metadata_size; 72 int scopes_data_size; 73 int scopes_pcs_size; 74 75 public: 76 CodeBlob_sizes() { 77 count = 0; 78 total_size = 0; 79 header_size = 0; 80 code_size = 0; 81 stub_size = 0; 82 relocation_size = 0; 83 scopes_oop_size = 0; 84 scopes_metadata_size = 0; 85 scopes_data_size = 0; 86 scopes_pcs_size = 0; 87 } 88 89 int total() { return total_size; } 90 bool is_empty() { return count == 0; } 91 92 void print(const char* title) { 93 tty->print_cr(" #%d %s = %dK (hdr %d%%, loc %d%%, code %d%%, stub %d%%, [oops %d%%, metadata %d%%, data %d%%, pcs %d%%])", 94 count, 95 title, 96 (int)(total() / K), 97 header_size * 100 / total_size, 98 relocation_size * 100 / total_size, 99 code_size * 100 / total_size, 100 stub_size * 100 / total_size, 101 scopes_oop_size * 100 / total_size, 102 scopes_metadata_size * 100 / total_size, 103 scopes_data_size * 100 / total_size, 104 scopes_pcs_size * 100 / total_size); 105 } 106 107 void add(CodeBlob* cb) { 108 count++; 109 total_size += cb->size(); 110 header_size += cb->header_size(); 111 relocation_size += cb->relocation_size(); 112 if (cb->is_nmethod()) { 113 nmethod* nm = cb->as_nmethod_or_null(); 114 code_size += nm->insts_size(); 115 stub_size += nm->stub_size(); 116 117 scopes_oop_size += nm->oops_size(); 118 scopes_metadata_size += nm->metadata_size(); 119 scopes_data_size += nm->scopes_data_size(); 120 scopes_pcs_size += nm->scopes_pcs_size(); 121 } else { 122 code_size += cb->code_size(); 123 } 124 } 125 }; 126 127 // Iterate over all CodeHeaps 128 #define FOR_ALL_HEAPS(heap) for (GrowableArrayIterator<CodeHeap*> heap = _heaps->begin(); heap != _heaps->end(); ++heap) 129 // Iterate over all CodeBlobs (cb) on the given CodeHeap 130 #define FOR_ALL_BLOBS(cb, heap) for (CodeBlob* cb = first_blob(heap); cb != NULL; cb = next_blob(heap, cb)) 131 132 address CodeCache::_low_bound = 0; 133 address CodeCache::_high_bound = 0; 134 int CodeCache::_number_of_blobs = 0; 135 int CodeCache::_number_of_adapters = 0; 136 int CodeCache::_number_of_nmethods = 0; 137 int CodeCache::_number_of_nmethods_with_dependencies = 0; 138 bool CodeCache::_needs_cache_clean = false; 139 nmethod* CodeCache::_scavenge_root_nmethods = NULL; 140 int CodeCache::_codemem_full_count = 0; 141 142 // Initialize array of CodeHeaps 143 GrowableArray<CodeHeap*>* CodeCache::_heaps = new(ResourceObj::C_HEAP, mtCode) GrowableArray<CodeHeap*> (CodeBlobType::All, true); 144 145 void CodeCache::initialize_heaps() { 146 // Determine size of compiler buffers 147 size_t code_buffers_size = 0; 148 #ifdef COMPILER1 149 // C1 temporary code buffers (see Compiler::init_buffer_blob()) 150 const int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); 151 code_buffers_size += c1_count * Compiler::code_buffer_size(); 152 #endif 153 #ifdef COMPILER2 154 // C2 scratch buffers (see Compile::init_scratch_buffer_blob()) 155 const int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); 156 // Initial size of constant table (this may be increased if a compiled method needs more space) 157 code_buffers_size += c2_count * C2Compiler::initial_code_buffer_size(); 158 #endif 159 160 // Calculate default CodeHeap sizes if not set by user 161 if (!FLAG_IS_CMDLINE(NonMethodCodeHeapSize) && !FLAG_IS_CMDLINE(ProfiledCodeHeapSize) 162 && !FLAG_IS_CMDLINE(NonProfiledCodeHeapSize)) { 163 // Increase default NonMethodCodeHeapSize to account for compiler buffers 164 FLAG_SET_ERGO(uintx, NonMethodCodeHeapSize, NonMethodCodeHeapSize + code_buffers_size); 165 166 // Check if we have enough space for the non-method code heap 167 if (ReservedCodeCacheSize > NonMethodCodeHeapSize) { 168 // Use the default value for NonMethodCodeHeapSize and one half of the 169 // remaining size for non-profiled methods and one half for profiled methods 170 size_t remaining_size = ReservedCodeCacheSize - NonMethodCodeHeapSize; 171 size_t profiled_size = remaining_size / 2; 172 size_t non_profiled_size = remaining_size - profiled_size; 173 FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, profiled_size); 174 FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, non_profiled_size); 175 } else { 176 // Use all space for the non-method heap and set other heaps to minimal size 177 FLAG_SET_ERGO(uintx, NonMethodCodeHeapSize, ReservedCodeCacheSize - os::vm_page_size() * 2); 178 FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, os::vm_page_size()); 179 FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, os::vm_page_size()); 180 } 181 } 182 183 // We do not need the profiled CodeHeap, use all space for the non-profiled CodeHeap 184 if(!heap_available(CodeBlobType::MethodProfiled)) { 185 FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, NonProfiledCodeHeapSize + ProfiledCodeHeapSize); 186 FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, 0); 187 } 188 // We do not need the non-profiled CodeHeap, use all space for the non-method CodeHeap 189 if(!heap_available(CodeBlobType::MethodNonProfiled)) { 190 FLAG_SET_ERGO(uintx, NonMethodCodeHeapSize, NonMethodCodeHeapSize + NonProfiledCodeHeapSize); 191 FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, 0); 192 } 193 194 // Make sure we have enough space for VM internal code 195 uint min_code_cache_size = (CodeCacheMinimumUseSpace DEBUG_ONLY(* 3)) + CodeCacheMinimumFreeSpace; 196 if (NonMethodCodeHeapSize < (min_code_cache_size + code_buffers_size)) { 197 vm_exit_during_initialization("Not enough space in non-method code heap to run VM."); 198 } 199 guarantee(NonProfiledCodeHeapSize + ProfiledCodeHeapSize + NonMethodCodeHeapSize <= ReservedCodeCacheSize, "Size check"); 200 201 // Align reserved sizes of CodeHeaps 202 size_t non_method_size = ReservedCodeSpace::allocation_align_size_up(NonMethodCodeHeapSize); 203 size_t profiled_size = ReservedCodeSpace::allocation_align_size_up(ProfiledCodeHeapSize); 204 size_t non_profiled_size = ReservedCodeSpace::allocation_align_size_up(NonProfiledCodeHeapSize); 205 206 // Compute initial sizes of CodeHeaps 207 size_t init_non_method_size = MIN2(InitialCodeCacheSize, non_method_size); 208 size_t init_profiled_size = MIN2(InitialCodeCacheSize, profiled_size); 209 size_t init_non_profiled_size = MIN2(InitialCodeCacheSize, non_profiled_size); 210 211 // Reserve one continuous chunk of memory for CodeHeaps and split it into 212 // parts for the individual heaps. The memory layout looks like this: 213 // ---------- high ----------- 214 // Non-profiled nmethods 215 // Profiled nmethods 216 // Non-methods 217 // ---------- low ------------ 218 ReservedCodeSpace rs = reserve_heap_memory(non_profiled_size + profiled_size + non_method_size); 219 ReservedSpace non_method_space = rs.first_part(non_method_size); 220 ReservedSpace rest = rs.last_part(non_method_size); 221 ReservedSpace profiled_space = rest.first_part(profiled_size); 222 ReservedSpace non_profiled_space = rest.last_part(profiled_size); 223 224 // Non-methods (stubs, adapters, ...) 225 add_heap(non_method_space, "non-methods", init_non_method_size, CodeBlobType::NonMethod); 226 // Tier 2 and tier 3 (profiled) methods 227 add_heap(profiled_space, "profiled nmethods", init_profiled_size, CodeBlobType::MethodProfiled); 228 // Tier 1 and tier 4 (non-profiled) methods and native methods 229 add_heap(non_profiled_space, "non-profiled nmethods", init_non_profiled_size, CodeBlobType::MethodNonProfiled); 230 } 231 232 ReservedCodeSpace CodeCache::reserve_heap_memory(size_t size) { 233 // Determine alignment 234 const size_t page_size = os::can_execute_large_page_memory() ? 235 MIN2(os::page_size_for_region(InitialCodeCacheSize, 8), 236 os::page_size_for_region(size, 8)) : 237 os::vm_page_size(); 238 const size_t granularity = os::vm_allocation_granularity(); 239 const size_t r_align = MAX2(page_size, granularity); 240 const size_t r_size = align_size_up(size, r_align); 241 const size_t rs_align = page_size == (size_t) os::vm_page_size() ? 0 : 242 MAX2(page_size, granularity); 243 244 ReservedCodeSpace rs(r_size, rs_align, rs_align > 0); 245 246 // Initialize bounds 247 _low_bound = (address)rs.base(); 248 _high_bound = _low_bound + rs.size(); 249 250 return rs; 251 } 252 253 bool CodeCache::heap_available(int code_blob_type) { 254 if (!SegmentedCodeCache) { 255 // No segmentation: use a single code heap 256 return (code_blob_type == CodeBlobType::All); 257 } else if ((Arguments::mode() == Arguments::_int) || 258 (TieredStopAtLevel == CompLevel_none)) { 259 // Interpreter only: we don't need any method code heaps 260 return (code_blob_type == CodeBlobType::NonMethod); 261 } else if (TieredCompilation && (TieredStopAtLevel > CompLevel_simple)) { 262 // Tiered compilation: use all code heaps 263 return (code_blob_type < CodeBlobType::All); 264 } else { 265 // No TieredCompilation: we only need the non-method and non-profiled code heap 266 return (code_blob_type == CodeBlobType::NonMethod) || 267 (code_blob_type == CodeBlobType::MethodNonProfiled); 268 } 269 } 270 271 void CodeCache::add_heap(ReservedSpace rs, const char* name, size_t size_initial, int code_blob_type) { 272 // Check if heap is needed 273 if (!heap_available(code_blob_type)) { 274 return; 275 } 276 277 // Create CodeHeap 278 CodeHeap* heap = new CodeHeap(name, code_blob_type); 279 _heaps->append(heap); 280 281 // Reserve Space 282 size_initial = round_to(size_initial, os::vm_page_size()); 283 284 if (!heap->reserve(rs, size_initial, CodeCacheSegmentSize)) { 285 vm_exit_during_initialization("Could not reserve enough space for code cache"); 286 } 287 288 // Register the CodeHeap 289 MemoryService::add_code_heap_memory_pool(heap, name); 290 } 291 292 CodeHeap* CodeCache::get_code_heap(CodeBlob* cb) { 293 assert(cb != NULL, "CodeBlob is null"); 294 FOR_ALL_HEAPS(heap) { 295 if ((*heap)->contains(cb)) { 296 return *heap; 297 } 298 } 299 ShouldNotReachHere(); 300 return NULL; 301 } 302 303 CodeHeap* CodeCache::get_code_heap(int code_blob_type) { 304 FOR_ALL_HEAPS(heap) { 305 if ((*heap)->accepts(code_blob_type)) { 306 return *heap; 307 } 308 } 309 return NULL; 310 } 311 312 CodeBlob* CodeCache::first_blob(CodeHeap* heap) { 313 assert_locked_or_safepoint(CodeCache_lock); 314 assert(heap != NULL, "heap is null"); 315 return (CodeBlob*)heap->first(); 316 } 317 318 CodeBlob* CodeCache::first_blob(int code_blob_type) { 319 if (heap_available(code_blob_type)) { 320 return first_blob(get_code_heap(code_blob_type)); 321 } else { 322 return NULL; 323 } 324 } 325 326 CodeBlob* CodeCache::next_blob(CodeHeap* heap, CodeBlob* cb) { 327 assert_locked_or_safepoint(CodeCache_lock); 328 assert(heap != NULL, "heap is null"); 329 return (CodeBlob*)heap->next(cb); 330 } 331 332 CodeBlob* CodeCache::next_blob(CodeBlob* cb) { 333 return next_blob(get_code_heap(cb), cb); 334 } 335 336 CodeBlob* CodeCache::allocate(int size, int code_blob_type, bool is_critical) { 337 // Do not seize the CodeCache lock here--if the caller has not 338 // already done so, we are going to lose bigtime, since the code 339 // cache will contain a garbage CodeBlob until the caller can 340 // run the constructor for the CodeBlob subclass he is busy 341 // instantiating. 342 assert_locked_or_safepoint(CodeCache_lock); 343 assert(size > 0, "allocation request must be reasonable"); 344 if (size <= 0) { 345 return NULL; 346 } 347 CodeBlob* cb = NULL; 348 349 // Get CodeHeap for the given CodeBlobType 350 CodeHeap* heap = get_code_heap(SegmentedCodeCache ? code_blob_type : CodeBlobType::All); 351 assert (heap != NULL, "heap is null"); 352 353 while (true) { 354 cb = (CodeBlob*)heap->allocate(size, is_critical); 355 if (cb != NULL) break; 356 if (!heap->expand_by(CodeCacheExpansionSize)) { 357 // Expansion failed 358 if (SegmentedCodeCache && (code_blob_type == CodeBlobType::NonMethod)) { 359 // Fallback solution: Store non-method code in the non-profiled code heap 360 return allocate(size, CodeBlobType::MethodNonProfiled, is_critical); 361 } 362 return NULL; 363 } 364 if (PrintCodeCacheExtension) { 365 ResourceMark rm; 366 if (SegmentedCodeCache) { 367 tty->print("Code heap '%s'", heap->name()); 368 } else { 369 tty->print("Code cache"); 370 } 371 tty->print_cr(" extended to [" INTPTR_FORMAT ", " INTPTR_FORMAT "] (" SSIZE_FORMAT " bytes)", 372 (intptr_t)heap->low_boundary(), (intptr_t)heap->high(), 373 (address)heap->high() - (address)heap->low_boundary()); 374 } 375 } 376 print_trace("allocation", cb, size); 377 _number_of_blobs++; 378 return cb; 379 } 380 381 void CodeCache::free(CodeBlob* cb) { 382 assert_locked_or_safepoint(CodeCache_lock); 383 384 print_trace("free", cb); 385 if (cb->is_nmethod()) { 386 _number_of_nmethods--; 387 if (((nmethod *)cb)->has_dependencies()) { 388 _number_of_nmethods_with_dependencies--; 389 } 390 } 391 if (cb->is_adapter_blob()) { 392 _number_of_adapters--; 393 } 394 _number_of_blobs--; 395 396 // Get heap for given CodeBlob and deallocate 397 get_code_heap(cb)->deallocate(cb); 398 399 assert(_number_of_blobs >= 0, "sanity check"); 400 } 401 402 void CodeCache::commit(CodeBlob* cb) { 403 // this is called by nmethod::nmethod, which must already own CodeCache_lock 404 assert_locked_or_safepoint(CodeCache_lock); 405 if (cb->is_nmethod()) { 406 _number_of_nmethods++; 407 if (((nmethod *)cb)->has_dependencies()) { 408 _number_of_nmethods_with_dependencies++; 409 } 410 } 411 if (cb->is_adapter_blob()) { 412 _number_of_adapters++; 413 } 414 415 // flush the hardware I-cache 416 ICache::invalidate_range(cb->content_begin(), cb->content_size()); 417 } 418 419 bool CodeCache::contains(void *p) { 420 // It should be ok to call contains without holding a lock 421 FOR_ALL_HEAPS(heap) { 422 if ((*heap)->contains(p)) { 423 return true; 424 } 425 } 426 return false; 427 } 428 429 // This method is safe to call without holding the CodeCache_lock, as long as a dead CodeBlob is not 430 // looked up (i.e., one that has been marked for deletion). It only depends on the _segmap to contain 431 // valid indices, which it will always do, as long as the CodeBlob is not in the process of being recycled. 432 CodeBlob* CodeCache::find_blob(void* start) { 433 CodeBlob* result = find_blob_unsafe(start); 434 // We could potentially look up non_entrant methods 435 guarantee(result == NULL || !result->is_zombie() || result->is_locked_by_vm() || is_error_reported(), "unsafe access to zombie method"); 436 return result; 437 } 438 439 // Lookup that does not fail if you lookup a zombie method (if you call this, be sure to know 440 // what you are doing) 441 CodeBlob* CodeCache::find_blob_unsafe(void* start) { 442 // NMT can walk the stack before code cache is created 443 if (_heaps == NULL || _heaps->is_empty()) return NULL; 444 445 FOR_ALL_HEAPS(heap) { 446 CodeBlob* result = (CodeBlob*) (*heap)->find_start(start); 447 if (result != NULL && result->blob_contains((address)start)) { 448 return result; 449 } 450 } 451 return NULL; 452 } 453 454 nmethod* CodeCache::find_nmethod(void* start) { 455 CodeBlob* cb = find_blob(start); 456 assert(cb->is_nmethod(), "did not find an nmethod"); 457 return (nmethod*)cb; 458 } 459 460 void CodeCache::blobs_do(void f(CodeBlob* nm)) { 461 assert_locked_or_safepoint(CodeCache_lock); 462 FOR_ALL_HEAPS(heap) { 463 FOR_ALL_BLOBS(cb, *heap) { 464 f(cb); 465 } 466 } 467 } 468 469 void CodeCache::nmethods_do(void f(nmethod* nm)) { 470 assert_locked_or_safepoint(CodeCache_lock); 471 NMethodIterator iter; 472 while(iter.next()) { 473 f(iter.method()); 474 } 475 } 476 477 void CodeCache::alive_nmethods_do(void f(nmethod* nm)) { 478 assert_locked_or_safepoint(CodeCache_lock); 479 NMethodIterator iter; 480 while(iter.next_alive()) { 481 f(iter.method()); 482 } 483 } 484 485 int CodeCache::alignment_unit() { 486 return (int)_heaps->first()->alignment_unit(); 487 } 488 489 int CodeCache::alignment_offset() { 490 return (int)_heaps->first()->alignment_offset(); 491 } 492 493 // Mark nmethods for unloading if they contain otherwise unreachable oops. 494 void CodeCache::do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred) { 495 assert_locked_or_safepoint(CodeCache_lock); 496 NMethodIterator iter; 497 while(iter.next_alive()) { 498 iter.method()->do_unloading(is_alive, unloading_occurred); 499 } 500 } 501 502 void CodeCache::blobs_do(CodeBlobClosure* f) { 503 assert_locked_or_safepoint(CodeCache_lock); 504 FOR_ALL_HEAPS(heap) { 505 FOR_ALL_BLOBS(cb, *heap) { 506 if (cb->is_alive()) { 507 f->do_code_blob(cb); 508 509 #ifdef ASSERT 510 if (cb->is_nmethod()) 511 ((nmethod*)cb)->verify_scavenge_root_oops(); 512 #endif //ASSERT 513 } 514 } 515 } 516 } 517 518 // Walk the list of methods which might contain non-perm oops. 519 void CodeCache::scavenge_root_nmethods_do(CodeBlobClosure* f) { 520 assert_locked_or_safepoint(CodeCache_lock); 521 522 if (UseG1GC) { 523 return; 524 } 525 526 debug_only(mark_scavenge_root_nmethods()); 527 528 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { 529 debug_only(cur->clear_scavenge_root_marked()); 530 assert(cur->scavenge_root_not_marked(), ""); 531 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); 532 533 bool is_live = (!cur->is_zombie() && !cur->is_unloaded()); 534 #ifndef PRODUCT 535 if (TraceScavenge) { 536 cur->print_on(tty, is_live ? "scavenge root" : "dead scavenge root"); tty->cr(); 537 } 538 #endif //PRODUCT 539 if (is_live) { 540 // Perform cur->oops_do(f), maybe just once per nmethod. 541 f->do_code_blob(cur); 542 } 543 } 544 545 // Check for stray marks. 546 debug_only(verify_perm_nmethods(NULL)); 547 } 548 549 void CodeCache::add_scavenge_root_nmethod(nmethod* nm) { 550 assert_locked_or_safepoint(CodeCache_lock); 551 552 if (UseG1GC) { 553 return; 554 } 555 556 nm->set_on_scavenge_root_list(); 557 nm->set_scavenge_root_link(_scavenge_root_nmethods); 558 set_scavenge_root_nmethods(nm); 559 print_trace("add_scavenge_root", nm); 560 } 561 562 void CodeCache::drop_scavenge_root_nmethod(nmethod* nm) { 563 assert_locked_or_safepoint(CodeCache_lock); 564 565 if (UseG1GC) { 566 return; 567 } 568 569 print_trace("drop_scavenge_root", nm); 570 nmethod* last = NULL; 571 nmethod* cur = scavenge_root_nmethods(); 572 while (cur != NULL) { 573 nmethod* next = cur->scavenge_root_link(); 574 if (cur == nm) { 575 if (last != NULL) 576 last->set_scavenge_root_link(next); 577 else set_scavenge_root_nmethods(next); 578 nm->set_scavenge_root_link(NULL); 579 nm->clear_on_scavenge_root_list(); 580 return; 581 } 582 last = cur; 583 cur = next; 584 } 585 assert(false, "should have been on list"); 586 } 587 588 void CodeCache::prune_scavenge_root_nmethods() { 589 assert_locked_or_safepoint(CodeCache_lock); 590 591 if (UseG1GC) { 592 return; 593 } 594 595 debug_only(mark_scavenge_root_nmethods()); 596 597 nmethod* last = NULL; 598 nmethod* cur = scavenge_root_nmethods(); 599 while (cur != NULL) { 600 nmethod* next = cur->scavenge_root_link(); 601 debug_only(cur->clear_scavenge_root_marked()); 602 assert(cur->scavenge_root_not_marked(), ""); 603 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); 604 605 if (!cur->is_zombie() && !cur->is_unloaded() 606 && cur->detect_scavenge_root_oops()) { 607 // Keep it. Advance 'last' to prevent deletion. 608 last = cur; 609 } else { 610 // Prune it from the list, so we don't have to look at it any more. 611 print_trace("prune_scavenge_root", cur); 612 cur->set_scavenge_root_link(NULL); 613 cur->clear_on_scavenge_root_list(); 614 if (last != NULL) 615 last->set_scavenge_root_link(next); 616 else set_scavenge_root_nmethods(next); 617 } 618 cur = next; 619 } 620 621 // Check for stray marks. 622 debug_only(verify_perm_nmethods(NULL)); 623 } 624 625 #ifndef PRODUCT 626 void CodeCache::asserted_non_scavengable_nmethods_do(CodeBlobClosure* f) { 627 if (UseG1GC) { 628 return; 629 } 630 631 // While we are here, verify the integrity of the list. 632 mark_scavenge_root_nmethods(); 633 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { 634 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); 635 cur->clear_scavenge_root_marked(); 636 } 637 verify_perm_nmethods(f); 638 } 639 640 // Temporarily mark nmethods that are claimed to be on the non-perm list. 641 void CodeCache::mark_scavenge_root_nmethods() { 642 NMethodIterator iter; 643 while(iter.next_alive()) { 644 nmethod* nm = iter.method(); 645 assert(nm->scavenge_root_not_marked(), "clean state"); 646 if (nm->on_scavenge_root_list()) 647 nm->set_scavenge_root_marked(); 648 } 649 } 650 651 // If the closure is given, run it on the unlisted nmethods. 652 // Also make sure that the effects of mark_scavenge_root_nmethods is gone. 653 void CodeCache::verify_perm_nmethods(CodeBlobClosure* f_or_null) { 654 NMethodIterator iter; 655 while(iter.next_alive()) { 656 nmethod* nm = iter.method(); 657 bool call_f = (f_or_null != NULL); 658 assert(nm->scavenge_root_not_marked(), "must be already processed"); 659 if (nm->on_scavenge_root_list()) 660 call_f = false; // don't show this one to the client 661 nm->verify_scavenge_root_oops(); 662 if (call_f) f_or_null->do_code_blob(nm); 663 } 664 } 665 #endif //PRODUCT 666 667 void CodeCache::verify_clean_inline_caches() { 668 #ifdef ASSERT 669 NMethodIterator iter; 670 while(iter.next_alive()) { 671 nmethod* nm = iter.method(); 672 assert(!nm->is_unloaded(), "Tautology"); 673 nm->verify_clean_inline_caches(); 674 nm->verify(); 675 } 676 #endif 677 } 678 679 void CodeCache::verify_icholder_relocations() { 680 #ifdef ASSERT 681 // make sure that we aren't leaking icholders 682 int count = 0; 683 FOR_ALL_HEAPS(heap) { 684 FOR_ALL_BLOBS(cb, *heap) { 685 if (cb->is_nmethod()) { 686 nmethod* nm = (nmethod*)cb; 687 count += nm->verify_icholder_relocations(); 688 } 689 } 690 } 691 692 assert(count + InlineCacheBuffer::pending_icholder_count() + CompiledICHolder::live_not_claimed_count() == 693 CompiledICHolder::live_count(), "must agree"); 694 #endif 695 } 696 697 void CodeCache::gc_prologue() { 698 } 699 700 void CodeCache::gc_epilogue() { 701 assert_locked_or_safepoint(CodeCache_lock); 702 NMethodIterator iter; 703 while(iter.next_alive()) { 704 nmethod* nm = iter.method(); 705 assert(!nm->is_unloaded(), "Tautology"); 706 if (needs_cache_clean()) { 707 nm->cleanup_inline_caches(); 708 } 709 DEBUG_ONLY(nm->verify()); 710 DEBUG_ONLY(nm->verify_oop_relocations()); 711 } 712 set_needs_cache_clean(false); 713 prune_scavenge_root_nmethods(); 714 715 verify_icholder_relocations(); 716 } 717 718 void CodeCache::verify_oops() { 719 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 720 VerifyOopClosure voc; 721 NMethodIterator iter; 722 while(iter.next_alive()) { 723 nmethod* nm = iter.method(); 724 nm->oops_do(&voc); 725 nm->verify_oop_relocations(); 726 } 727 } 728 729 size_t CodeCache::capacity() { 730 size_t cap = 0; 731 FOR_ALL_HEAPS(heap) { 732 cap += (*heap)->capacity(); 733 } 734 return cap; 735 } 736 737 size_t CodeCache::unallocated_capacity() { 738 size_t unallocated_cap = 0; 739 FOR_ALL_HEAPS(heap) { 740 unallocated_cap += (*heap)->unallocated_capacity(); 741 } 742 return unallocated_cap; 743 } 744 745 size_t CodeCache::max_capacity() { 746 size_t max_cap = 0; 747 FOR_ALL_HEAPS(heap) { 748 max_cap += (*heap)->max_capacity(); 749 } 750 return max_cap; 751 } 752 753 /** 754 * Returns true if a CodeHeap is full and sets code_blob_type accordingly. 755 */ 756 bool CodeCache::is_full(int* code_blob_type) { 757 FOR_ALL_HEAPS(heap) { 758 if ((*heap)->unallocated_capacity() < CodeCacheMinimumFreeSpace) { 759 *code_blob_type = (*heap)->code_blob_type(); 760 return true; 761 } 762 } 763 return false; 764 } 765 766 /** 767 * Returns the reverse free ratio. E.g., if 25% (1/4) of the code heap 768 * is free, reverse_free_ratio() returns 4. 769 */ 770 double CodeCache::reverse_free_ratio(int code_blob_type) { 771 CodeHeap* heap = get_code_heap(code_blob_type); 772 if (heap == NULL) { 773 return 0; 774 } 775 double unallocated_capacity = (double)(heap->unallocated_capacity() - CodeCacheMinimumFreeSpace); 776 double max_capacity = (double)heap->max_capacity(); 777 return max_capacity / unallocated_capacity; 778 } 779 780 size_t CodeCache::bytes_allocated_in_freelists() { 781 size_t allocated_bytes = 0; 782 FOR_ALL_HEAPS(heap) { 783 allocated_bytes += (*heap)->allocated_in_freelist(); 784 } 785 return allocated_bytes; 786 } 787 788 int CodeCache::allocated_segments() { 789 int number_of_segments = 0; 790 FOR_ALL_HEAPS(heap) { 791 number_of_segments += (*heap)->allocated_segments(); 792 } 793 return number_of_segments; 794 } 795 796 size_t CodeCache::freelists_length() { 797 size_t length = 0; 798 FOR_ALL_HEAPS(heap) { 799 length += (*heap)->freelist_length(); 800 } 801 return length; 802 } 803 804 void icache_init(); 805 806 void CodeCache::initialize() { 807 assert(CodeCacheSegmentSize >= (uintx)CodeEntryAlignment, "CodeCacheSegmentSize must be large enough to align entry points"); 808 #ifdef COMPILER2 809 assert(CodeCacheSegmentSize >= (uintx)OptoLoopAlignment, "CodeCacheSegmentSize must be large enough to align inner loops"); 810 #endif 811 assert(CodeCacheSegmentSize >= sizeof(jdouble), "CodeCacheSegmentSize must be large enough to align constants"); 812 // This was originally just a check of the alignment, causing failure, instead, round 813 // the code cache to the page size. In particular, Solaris is moving to a larger 814 // default page size. 815 CodeCacheExpansionSize = round_to(CodeCacheExpansionSize, os::vm_page_size()); 816 817 if (SegmentedCodeCache) { 818 // Use multiple code heaps 819 initialize_heaps(); 820 } else { 821 // Use a single code heap 822 ReservedCodeSpace rs = reserve_heap_memory(ReservedCodeCacheSize); 823 add_heap(rs, "Code heap", InitialCodeCacheSize, CodeBlobType::All); 824 } 825 826 // Initialize ICache flush mechanism 827 // This service is needed for os::register_code_area 828 icache_init(); 829 830 // Give OS a chance to register generated code area. 831 // This is used on Windows 64 bit platforms to register 832 // Structured Exception Handlers for our generated code. 833 os::register_code_area((char*)low_bound(), (char*)high_bound()); 834 } 835 836 void codeCache_init() { 837 CodeCache::initialize(); 838 } 839 840 //------------------------------------------------------------------------------------------------ 841 842 int CodeCache::number_of_nmethods_with_dependencies() { 843 return _number_of_nmethods_with_dependencies; 844 } 845 846 void CodeCache::clear_inline_caches() { 847 assert_locked_or_safepoint(CodeCache_lock); 848 NMethodIterator iter; 849 while(iter.next_alive()) { 850 iter.method()->clear_inline_caches(); 851 } 852 } 853 854 // Keeps track of time spent for checking dependencies 855 NOT_PRODUCT(static elapsedTimer dependentCheckTime;) 856 857 int CodeCache::mark_for_deoptimization(DepChange& changes) { 858 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 859 int number_of_marked_CodeBlobs = 0; 860 861 // search the hierarchy looking for nmethods which are affected by the loading of this class 862 863 // then search the interfaces this class implements looking for nmethods 864 // which might be dependent of the fact that an interface only had one 865 // implementor. 866 // nmethod::check_all_dependencies works only correctly, if no safepoint 867 // can happen 868 No_Safepoint_Verifier nsv; 869 for (DepChange::ContextStream str(changes, nsv); str.next(); ) { 870 Klass* d = str.klass(); 871 number_of_marked_CodeBlobs += InstanceKlass::cast(d)->mark_dependent_nmethods(changes); 872 } 873 874 #ifndef PRODUCT 875 if (VerifyDependencies) { 876 // Object pointers are used as unique identifiers for dependency arguments. This 877 // is only possible if no safepoint, i.e., GC occurs during the verification code. 878 dependentCheckTime.start(); 879 nmethod::check_all_dependencies(changes); 880 dependentCheckTime.stop(); 881 } 882 #endif 883 884 return number_of_marked_CodeBlobs; 885 } 886 887 888 #ifdef HOTSWAP 889 int CodeCache::mark_for_evol_deoptimization(instanceKlassHandle dependee) { 890 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 891 int number_of_marked_CodeBlobs = 0; 892 893 // Deoptimize all methods of the evolving class itself 894 Array<Method*>* old_methods = dependee->methods(); 895 for (int i = 0; i < old_methods->length(); i++) { 896 ResourceMark rm; 897 Method* old_method = old_methods->at(i); 898 nmethod *nm = old_method->code(); 899 if (nm != NULL) { 900 nm->mark_for_deoptimization(); 901 number_of_marked_CodeBlobs++; 902 } 903 } 904 905 NMethodIterator iter; 906 while(iter.next_alive()) { 907 nmethod* nm = iter.method(); 908 if (nm->is_marked_for_deoptimization()) { 909 // ...Already marked in the previous pass; don't count it again. 910 } else if (nm->is_evol_dependent_on(dependee())) { 911 ResourceMark rm; 912 nm->mark_for_deoptimization(); 913 number_of_marked_CodeBlobs++; 914 } else { 915 // flush caches in case they refer to a redefined Method* 916 nm->clear_inline_caches(); 917 } 918 } 919 920 return number_of_marked_CodeBlobs; 921 } 922 #endif // HOTSWAP 923 924 925 // Deoptimize all methods 926 void CodeCache::mark_all_nmethods_for_deoptimization() { 927 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 928 NMethodIterator iter; 929 while(iter.next_alive()) { 930 nmethod* nm = iter.method(); 931 if (!nm->method()->is_method_handle_intrinsic()) { 932 nm->mark_for_deoptimization(); 933 } 934 } 935 } 936 937 int CodeCache::mark_for_deoptimization(Method* dependee) { 938 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 939 int number_of_marked_CodeBlobs = 0; 940 941 NMethodIterator iter; 942 while(iter.next_alive()) { 943 nmethod* nm = iter.method(); 944 if (nm->is_dependent_on_method(dependee)) { 945 ResourceMark rm; 946 nm->mark_for_deoptimization(); 947 number_of_marked_CodeBlobs++; 948 } 949 } 950 951 return number_of_marked_CodeBlobs; 952 } 953 954 void CodeCache::make_marked_nmethods_zombies() { 955 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); 956 NMethodIterator iter; 957 while(iter.next_alive()) { 958 nmethod* nm = iter.method(); 959 if (nm->is_marked_for_deoptimization()) { 960 961 // If the nmethod has already been made non-entrant and it can be converted 962 // then zombie it now. Otherwise make it non-entrant and it will eventually 963 // be zombied when it is no longer seen on the stack. Note that the nmethod 964 // might be "entrant" and not on the stack and so could be zombied immediately 965 // but we can't tell because we don't track it on stack until it becomes 966 // non-entrant. 967 968 if (nm->is_not_entrant() && nm->can_not_entrant_be_converted()) { 969 nm->make_zombie(); 970 } else { 971 nm->make_not_entrant(); 972 } 973 } 974 } 975 } 976 977 void CodeCache::make_marked_nmethods_not_entrant() { 978 assert_locked_or_safepoint(CodeCache_lock); 979 NMethodIterator iter; 980 while(iter.next_alive()) { 981 nmethod* nm = iter.method(); 982 if (nm->is_marked_for_deoptimization()) { 983 nm->make_not_entrant(); 984 } 985 } 986 } 987 988 void CodeCache::verify() { 989 assert_locked_or_safepoint(CodeCache_lock); 990 FOR_ALL_HEAPS(heap) { 991 (*heap)->verify(); 992 FOR_ALL_BLOBS(cb, *heap) { 993 if (cb->is_alive()) { 994 cb->verify(); 995 } 996 } 997 } 998 } 999 1000 // A CodeHeap is full. Print out warning and report event. 1001 void CodeCache::report_codemem_full(int code_blob_type, bool print) { 1002 // Get nmethod heap for the given CodeBlobType and build CodeCacheFull event 1003 CodeHeap* heap = get_code_heap(SegmentedCodeCache ? code_blob_type : CodeBlobType::All); 1004 1005 if (!heap->was_full() || print) { 1006 // Not yet reported for this heap, report 1007 heap->report_full(); 1008 if (SegmentedCodeCache) { 1009 warning("CodeHeap for %s is full. Compiler has been disabled.", CodeCache::get_code_heap_name(code_blob_type)); 1010 warning("Try increasing the code heap size using -XX:%s=", 1011 (code_blob_type == CodeBlobType::MethodNonProfiled) ? "NonProfiledCodeHeapSize" : "ProfiledCodeHeapSize"); 1012 } else { 1013 warning("CodeCache is full. Compiler has been disabled."); 1014 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize="); 1015 } 1016 ResourceMark rm; 1017 stringStream s; 1018 // Dump code cache into a buffer before locking the tty, 1019 { 1020 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1021 print_summary(&s); 1022 } 1023 ttyLocker ttyl; 1024 tty->print("%s", s.as_string()); 1025 } 1026 1027 _codemem_full_count++; 1028 EventCodeCacheFull event; 1029 if (event.should_commit()) { 1030 event.set_codeBlobType((u1)code_blob_type); 1031 event.set_startAddress((u8)heap->low_boundary()); 1032 event.set_commitedTopAddress((u8)heap->high()); 1033 event.set_reservedTopAddress((u8)heap->high_boundary()); 1034 event.set_entryCount(nof_blobs()); 1035 event.set_methodCount(nof_nmethods()); 1036 event.set_adaptorCount(nof_adapters()); 1037 event.set_unallocatedCapacity(heap->unallocated_capacity()/K); 1038 event.set_fullCount(_codemem_full_count); 1039 event.commit(); 1040 } 1041 } 1042 1043 void CodeCache::print_memory_overhead() { 1044 size_t wasted_bytes = 0; 1045 FOR_ALL_HEAPS(heap) { 1046 CodeHeap* curr_heap = *heap; 1047 for (CodeBlob* cb = (CodeBlob*)curr_heap->first(); cb != NULL; cb = (CodeBlob*)curr_heap->next(cb)) { 1048 HeapBlock* heap_block = ((HeapBlock*)cb) - 1; 1049 wasted_bytes += heap_block->length() * CodeCacheSegmentSize - cb->size(); 1050 } 1051 } 1052 // Print bytes that are allocated in the freelist 1053 ttyLocker ttl; 1054 tty->print_cr("Number of elements in freelist: " SSIZE_FORMAT, freelists_length()); 1055 tty->print_cr("Allocated in freelist: " SSIZE_FORMAT "kB", bytes_allocated_in_freelists()/K); 1056 tty->print_cr("Unused bytes in CodeBlobs: " SSIZE_FORMAT "kB", (wasted_bytes/K)); 1057 tty->print_cr("Segment map size: " SSIZE_FORMAT "kB", allocated_segments()/K); // 1 byte per segment 1058 } 1059 1060 //------------------------------------------------------------------------------------------------ 1061 // Non-product version 1062 1063 #ifndef PRODUCT 1064 1065 void CodeCache::print_trace(const char* event, CodeBlob* cb, int size) { 1066 if (PrintCodeCache2) { // Need to add a new flag 1067 ResourceMark rm; 1068 if (size == 0) size = cb->size(); 1069 tty->print_cr("CodeCache %s: addr: " INTPTR_FORMAT ", size: 0x%x", event, p2i(cb), size); 1070 } 1071 } 1072 1073 void CodeCache::print_internals() { 1074 int nmethodCount = 0; 1075 int runtimeStubCount = 0; 1076 int adapterCount = 0; 1077 int deoptimizationStubCount = 0; 1078 int uncommonTrapStubCount = 0; 1079 int bufferBlobCount = 0; 1080 int total = 0; 1081 int nmethodAlive = 0; 1082 int nmethodNotEntrant = 0; 1083 int nmethodZombie = 0; 1084 int nmethodUnloaded = 0; 1085 int nmethodJava = 0; 1086 int nmethodNative = 0; 1087 int max_nm_size = 0; 1088 ResourceMark rm; 1089 1090 int i = 0; 1091 FOR_ALL_HEAPS(heap) { 1092 if (SegmentedCodeCache && Verbose) { 1093 tty->print_cr("-- Code heap '%s' --", (*heap)->name()); 1094 } 1095 FOR_ALL_BLOBS(cb, *heap) { 1096 total++; 1097 if (cb->is_nmethod()) { 1098 nmethod* nm = (nmethod*)cb; 1099 1100 if (Verbose && nm->method() != NULL) { 1101 ResourceMark rm; 1102 char *method_name = nm->method()->name_and_sig_as_C_string(); 1103 tty->print("%s", method_name); 1104 if(nm->is_alive()) { tty->print_cr(" alive"); } 1105 if(nm->is_not_entrant()) { tty->print_cr(" not-entrant"); } 1106 if(nm->is_zombie()) { tty->print_cr(" zombie"); } 1107 } 1108 1109 nmethodCount++; 1110 1111 if(nm->is_alive()) { nmethodAlive++; } 1112 if(nm->is_not_entrant()) { nmethodNotEntrant++; } 1113 if(nm->is_zombie()) { nmethodZombie++; } 1114 if(nm->is_unloaded()) { nmethodUnloaded++; } 1115 if(nm->method() != NULL && nm->is_native_method()) { nmethodNative++; } 1116 1117 if(nm->method() != NULL && nm->is_java_method()) { 1118 nmethodJava++; 1119 max_nm_size = MAX2(max_nm_size, nm->size()); 1120 } 1121 } else if (cb->is_runtime_stub()) { 1122 runtimeStubCount++; 1123 } else if (cb->is_deoptimization_stub()) { 1124 deoptimizationStubCount++; 1125 } else if (cb->is_uncommon_trap_stub()) { 1126 uncommonTrapStubCount++; 1127 } else if (cb->is_adapter_blob()) { 1128 adapterCount++; 1129 } else if (cb->is_buffer_blob()) { 1130 bufferBlobCount++; 1131 } 1132 } 1133 } 1134 1135 int bucketSize = 512; 1136 int bucketLimit = max_nm_size / bucketSize + 1; 1137 int *buckets = NEW_C_HEAP_ARRAY(int, bucketLimit, mtCode); 1138 memset(buckets, 0, sizeof(int) * bucketLimit); 1139 1140 NMethodIterator iter; 1141 while(iter.next()) { 1142 nmethod* nm = iter.method(); 1143 if(nm->method() != NULL && nm->is_java_method()) { 1144 buckets[nm->size() / bucketSize]++; 1145 } 1146 } 1147 1148 tty->print_cr("Code Cache Entries (total of %d)",total); 1149 tty->print_cr("-------------------------------------------------"); 1150 tty->print_cr("nmethods: %d",nmethodCount); 1151 tty->print_cr("\talive: %d",nmethodAlive); 1152 tty->print_cr("\tnot_entrant: %d",nmethodNotEntrant); 1153 tty->print_cr("\tzombie: %d",nmethodZombie); 1154 tty->print_cr("\tunloaded: %d",nmethodUnloaded); 1155 tty->print_cr("\tjava: %d",nmethodJava); 1156 tty->print_cr("\tnative: %d",nmethodNative); 1157 tty->print_cr("runtime_stubs: %d",runtimeStubCount); 1158 tty->print_cr("adapters: %d",adapterCount); 1159 tty->print_cr("buffer blobs: %d",bufferBlobCount); 1160 tty->print_cr("deoptimization_stubs: %d",deoptimizationStubCount); 1161 tty->print_cr("uncommon_traps: %d",uncommonTrapStubCount); 1162 tty->print_cr("\nnmethod size distribution (non-zombie java)"); 1163 tty->print_cr("-------------------------------------------------"); 1164 1165 for(int i=0; i<bucketLimit; i++) { 1166 if(buckets[i] != 0) { 1167 tty->print("%d - %d bytes",i*bucketSize,(i+1)*bucketSize); 1168 tty->fill_to(40); 1169 tty->print_cr("%d",buckets[i]); 1170 } 1171 } 1172 1173 FREE_C_HEAP_ARRAY(int, buckets, mtCode); 1174 print_memory_overhead(); 1175 } 1176 1177 #endif // !PRODUCT 1178 1179 void CodeCache::print() { 1180 print_summary(tty); 1181 1182 #ifndef PRODUCT 1183 if (!Verbose) return; 1184 1185 CodeBlob_sizes live; 1186 CodeBlob_sizes dead; 1187 1188 FOR_ALL_HEAPS(heap) { 1189 FOR_ALL_BLOBS(cb, *heap) { 1190 if (!cb->is_alive()) { 1191 dead.add(cb); 1192 } else { 1193 live.add(cb); 1194 } 1195 } 1196 } 1197 1198 tty->print_cr("CodeCache:"); 1199 tty->print_cr("nmethod dependency checking time %fs", dependentCheckTime.seconds()); 1200 1201 if (!live.is_empty()) { 1202 live.print("live"); 1203 } 1204 if (!dead.is_empty()) { 1205 dead.print("dead"); 1206 } 1207 1208 if (WizardMode) { 1209 // print the oop_map usage 1210 int code_size = 0; 1211 int number_of_blobs = 0; 1212 int number_of_oop_maps = 0; 1213 int map_size = 0; 1214 FOR_ALL_HEAPS(heap) { 1215 FOR_ALL_BLOBS(cb, *heap) { 1216 if (cb->is_alive()) { 1217 number_of_blobs++; 1218 code_size += cb->code_size(); 1219 OopMapSet* set = cb->oop_maps(); 1220 if (set != NULL) { 1221 number_of_oop_maps += set->size(); 1222 map_size += set->heap_size(); 1223 } 1224 } 1225 } 1226 } 1227 tty->print_cr("OopMaps"); 1228 tty->print_cr(" #blobs = %d", number_of_blobs); 1229 tty->print_cr(" code size = %d", code_size); 1230 tty->print_cr(" #oop_maps = %d", number_of_oop_maps); 1231 tty->print_cr(" map size = %d", map_size); 1232 } 1233 1234 #endif // !PRODUCT 1235 } 1236 1237 void CodeCache::print_summary(outputStream* st, bool detailed) { 1238 FOR_ALL_HEAPS(heap_iterator) { 1239 CodeHeap* heap = (*heap_iterator); 1240 size_t total = (heap->high_boundary() - heap->low_boundary()); 1241 if (SegmentedCodeCache) { 1242 st->print("CodeHeap '%s':", heap->name()); 1243 } else { 1244 st->print("CodeCache:"); 1245 } 1246 st->print_cr(" size=" SIZE_FORMAT "Kb used=" SIZE_FORMAT 1247 "Kb max_used=" SIZE_FORMAT "Kb free=" SIZE_FORMAT "Kb", 1248 total/K, (total - heap->unallocated_capacity())/K, 1249 heap->max_allocated_capacity()/K, heap->unallocated_capacity()/K); 1250 1251 if (detailed) { 1252 st->print_cr(" bounds [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT "]", 1253 p2i(heap->low_boundary()), 1254 p2i(heap->high()), 1255 p2i(heap->high_boundary())); 1256 } 1257 } 1258 1259 if (detailed) { 1260 st->print_cr(" total_blobs=" UINT32_FORMAT " nmethods=" UINT32_FORMAT 1261 " adapters=" UINT32_FORMAT, 1262 nof_blobs(), nof_nmethods(), nof_adapters()); 1263 st->print_cr(" compilation: %s", CompileBroker::should_compile_new_jobs() ? 1264 "enabled" : Arguments::mode() == Arguments::_int ? 1265 "disabled (interpreter mode)" : 1266 "disabled (not enough contiguous free space left)"); 1267 } 1268 } 1269 1270 void CodeCache::print_codelist(outputStream* st) { 1271 assert_locked_or_safepoint(CodeCache_lock); 1272 1273 NMethodIterator iter; 1274 while(iter.next_alive()) { 1275 nmethod* nm = iter.method(); 1276 ResourceMark rm; 1277 char *method_name = nm->method()->name_and_sig_as_C_string(); 1278 st->print_cr("%d %d %s ["INTPTR_FORMAT", "INTPTR_FORMAT" - "INTPTR_FORMAT"]", 1279 nm->compile_id(), nm->comp_level(), method_name, (intptr_t)nm->header_begin(), 1280 (intptr_t)nm->code_begin(), (intptr_t)nm->code_end()); 1281 } 1282 } 1283 1284 void CodeCache::print_layout(outputStream* st) { 1285 assert_locked_or_safepoint(CodeCache_lock); 1286 ResourceMark rm; 1287 1288 print_summary(st, true); 1289 } 1290 1291 void CodeCache::log_state(outputStream* st) { 1292 st->print(" total_blobs='" UINT32_FORMAT "' nmethods='" UINT32_FORMAT "'" 1293 " adapters='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'", 1294 nof_blobs(), nof_nmethods(), nof_adapters(), 1295 unallocated_capacity()); 1296 }