1 /*
   2  * Copyright (c) 2016, 2017, 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 #include "precompiled.hpp"
  25 
  26 #include "aot/aotCodeHeap.hpp"
  27 #include "aot/aotLoader.hpp"
  28 #include "classfile/javaAssertions.hpp"
  29 #include "gc/g1/heapRegion.hpp"
  30 #include "gc/shared/gcLocker.hpp"
  31 #include "interpreter/abstractInterpreter.hpp"
  32 #include "jvmci/compilerRuntime.hpp"
  33 #include "jvmci/jvmciRuntime.hpp"
  34 #include "oops/method.hpp"
  35 #include "runtime/os.hpp"
  36 #include "runtime/sharedRuntime.hpp"
  37 #include "runtime/vm_operations.hpp"
  38 
  39 bool AOTLib::_narrow_oop_shift_initialized = false;
  40 int  AOTLib::_narrow_oop_shift = 0;
  41 int  AOTLib::_narrow_klass_shift = 0;
  42 
  43 address AOTLib::load_symbol(const char *name) {
  44   address symbol = (address) os::dll_lookup(_dl_handle, name);
  45   if (symbol == NULL) {
  46     tty->print_cr("Shared file %s error: missing %s", _name, name);
  47     vm_exit(1);
  48   }
  49   return symbol;
  50 }
  51 
  52 Klass* AOTCodeHeap::get_klass_from_got(const char* klass_name, int klass_len, const Method* method) {
  53   AOTKlassData* klass_data = (AOTKlassData*)_lib->load_symbol(klass_name);
  54   Klass* k = (Klass*)_metaspace_got[klass_data->_got_index];
  55   if (k == NULL) {
  56     Thread* thread = Thread::current();
  57     k = lookup_klass(klass_name, klass_len, method, thread);
  58     // Note, exceptions are cleared.
  59     if (k == NULL) {
  60       fatal("Shared file %s error: klass %s should be resolved already", _lib->name(), klass_name);
  61       vm_exit(1);
  62     }
  63     _metaspace_got[klass_data->_got_index] = k;
  64   }
  65   return k;
  66 }
  67 
  68 Klass* AOTCodeHeap::lookup_klass(const char* name, int len, const Method* method, Thread* thread) {
  69   ResourceMark rm(thread);
  70   assert(method != NULL, "incorrect call parameter");
  71   methodHandle caller(thread, (Method*)method);
  72 
  73   // Use class loader of aot method.
  74   Handle loader(thread, caller->method_holder()->class_loader());
  75   Handle protection_domain(thread, caller->method_holder()->protection_domain());
  76 
  77   // Ignore wrapping L and ;
  78   if (name[0] == 'L') {
  79     assert(len > 2, "small name %s", name);
  80     name++;
  81     len -= 2;
  82   }
  83   TempNewSymbol sym = SymbolTable::probe(name, len);
  84   if (sym == NULL) {
  85     log_debug(aot, class, resolve)("Probe failed for AOT class %s", name);
  86     return NULL;
  87   }
  88   Klass* k = SystemDictionary::find_instance_or_array_klass(sym, loader, protection_domain, thread);
  89   assert(!thread->has_pending_exception(), "should not throw");
  90 
  91   if (k != NULL) {
  92     log_info(aot, class, resolve)("%s %s (lookup)", caller->method_holder()->external_name(), k->external_name());
  93   }
  94   return k;
  95 }
  96 
  97 void AOTLib::handle_config_error(const char* format, ...) {
  98   if (PrintAOT) {
  99     va_list ap;
 100     va_start(ap, format);
 101     tty->vprint_cr(format, ap);
 102     va_end(ap);
 103   }
 104   if (UseAOTStrictLoading) {
 105     vm_exit(1);
 106   }
 107   _valid = false;
 108 }
 109 
 110 void AOTLib::verify_flag(bool aot_flag, bool flag, const char* name) {
 111   if (_valid && aot_flag != flag) {
 112     handle_config_error("Shared file %s error: %s has different value '%s' from current '%s'", _name, name , (aot_flag ? "true" : "false"), (flag ? "true" : "false"));
 113   }
 114 }
 115 
 116 void AOTLib::verify_flag(int aot_flag, int flag, const char* name) {
 117   if (_valid && aot_flag != flag) {
 118     handle_config_error("Shared file %s error: %s has different value '%d' from current '%d'", _name, name , aot_flag, flag);
 119   }
 120 }
 121 
 122 void AOTLib::verify_config() {
 123   GrowableArray<AOTLib*>* libraries = AOTLoader::libraries();
 124   for (GrowableArrayIterator<AOTLib*> lib = libraries->begin(); lib != libraries->end(); ++lib) {
 125     if ((*lib)->_config == _config) {
 126       handle_config_error("AOT library %s already loaded.", (*lib)->_name);
 127       return;
 128     }
 129   }
 130 
 131   if (_header->_version != AOTHeader::AOT_SHARED_VERSION) {
 132     handle_config_error("Invalid version of the shared file %s. Expected %d but was %d", _name, _header->_version, AOTHeader::AOT_SHARED_VERSION);
 133     return;
 134   }
 135 
 136   const char* aot_jvm_version = (const char*)_header + _header->_jvm_version_offset + 2;
 137   if (strcmp(aot_jvm_version, VM_Version::jre_release_version()) != 0) {
 138     handle_config_error("JVM version '%s' recorded in the shared file %s does not match current version '%s'", aot_jvm_version, _name, VM_Version::jre_release_version());
 139     return;
 140   }
 141 
 142   // Debug VM has different layout of runtime and metadata structures
 143 #ifdef ASSERT
 144   verify_flag(_config->_debug_VM, true, "Debug VM version");
 145 #else
 146   verify_flag(!(_config->_debug_VM), true, "Product VM version");
 147 #endif
 148   // Check configuration size
 149   verify_flag(_config->_config_size, AOTConfiguration::CONFIG_SIZE, "AOT configuration size");
 150 
 151   // Check flags
 152   verify_flag(_config->_useCompressedOops, UseCompressedOops, "UseCompressedOops");
 153   verify_flag(_config->_useCompressedClassPointers, UseCompressedClassPointers, "UseCompressedClassPointers");
 154   verify_flag(_config->_useG1GC, UseG1GC, "UseG1GC");
 155   verify_flag(_config->_useTLAB, UseTLAB, "UseTLAB");
 156   verify_flag(_config->_useBiasedLocking, UseBiasedLocking, "UseBiasedLocking");
 157   verify_flag(_config->_objectAlignment, ObjectAlignmentInBytes, "ObjectAlignmentInBytes");
 158   verify_flag(_config->_contendedPaddingWidth, ContendedPaddingWidth, "ContendedPaddingWidth");
 159   verify_flag(_config->_fieldsAllocationStyle, FieldsAllocationStyle, "FieldsAllocationStyle");
 160   verify_flag(_config->_compactFields, CompactFields, "CompactFields");
 161   verify_flag(_config->_enableContended, EnableContended, "EnableContended");
 162   verify_flag(_config->_restrictContended, RestrictContended, "RestrictContended");
 163 
 164   if (!TieredCompilation && _config->_tieredAOT) {
 165     handle_config_error("Shared file %s error: Expected to run with tiered compilation on", _name);
 166   }
 167 
 168   // Shifts are static values which initialized by 0 until java heap initialization.
 169   // AOT libs are loaded before heap initialized so shift values are not set.
 170   // It is okay since ObjectAlignmentInBytes flag which defines shifts value is set before AOT libs are loaded.
 171   // Set shifts value based on first AOT library config.
 172   if (UseCompressedOops && _valid) {
 173     if (!_narrow_oop_shift_initialized) {
 174       _narrow_oop_shift = _config->_narrowOopShift;
 175       if (UseCompressedClassPointers) { // It is set only if UseCompressedOops is set
 176         _narrow_klass_shift = _config->_narrowKlassShift;
 177       }
 178       _narrow_oop_shift_initialized = true;
 179     } else {
 180       verify_flag(_config->_narrowOopShift, _narrow_oop_shift, "aot_config->_narrowOopShift");
 181       if (UseCompressedClassPointers) { // It is set only if UseCompressedOops is set
 182         verify_flag(_config->_narrowKlassShift, _narrow_klass_shift, "aot_config->_narrowKlassShift");
 183       }
 184     }
 185   }
 186 }
 187 
 188 AOTLib::~AOTLib() {
 189   free((void*) _name);
 190 }
 191 
 192 AOTCodeHeap::~AOTCodeHeap() {
 193   if (_classes != NULL) {
 194     FREE_C_HEAP_ARRAY(AOTClass, _classes);
 195   }
 196   if (_code_to_aot != NULL) {
 197     FREE_C_HEAP_ARRAY(CodeToAMethod, _code_to_aot);
 198   }
 199 }
 200 
 201 AOTLib::AOTLib(void* handle, const char* name, int dso_id) : _valid(true), _dl_handle(handle), _dso_id(dso_id) {
 202   _name = (const char*) strdup(name);
 203 
 204   // Verify that VM runs with the same parameters as AOT tool.
 205   _config = (AOTConfiguration*) load_symbol("JVM.config");
 206   _header = (AOTHeader*) load_symbol("JVM.header");
 207 
 208   verify_config();
 209 
 210   if (!_valid && PrintAOT) {
 211       tty->print("%7d ", (int) tty->time_stamp().milliseconds());
 212       tty->print_cr("%4d     skipped %s  aot library", _dso_id, _name);
 213   }
 214 }
 215 
 216 AOTCodeHeap::AOTCodeHeap(AOTLib* lib) :
 217     CodeHeap("CodeHeap 'AOT'", CodeBlobType::AOT), _lib(lib), _classes(NULL), _code_to_aot(NULL) {
 218   assert(_lib->is_valid(), "invalid library");
 219 
 220   _lib_symbols_initialized = false;
 221   _aot_id = 0;
 222 
 223   _class_count = _lib->header()->_class_count;
 224   _method_count = _lib->header()->_method_count;
 225 
 226   // Collect metaspace info: names -> address in .got section
 227   _metaspace_names = (const char*) _lib->load_symbol("JVM.meta.names");
 228   _method_metadata =     (address) _lib->load_symbol("JVM.meth.metadata");
 229   _methods_offsets =     (address) _lib->load_symbol("JVM.methods.offsets");
 230   _klasses_offsets =     (address) _lib->load_symbol("JVM.kls.offsets");
 231   _dependencies    =     (address) _lib->load_symbol("JVM.kls.dependencies");
 232   _code_space      =     (address) _lib->load_symbol("JVM.text");
 233 
 234   // First cell is number of elements.
 235   _metaspace_got      = (Metadata**) _lib->load_symbol("JVM.meta.got");
 236   _metaspace_got_size = _lib->header()->_metaspace_got_size;
 237 
 238   _metadata_got      = (Metadata**) _lib->load_symbol("JVM.metadata.got");
 239   _metadata_got_size = _lib->header()->_metadata_got_size;
 240 
 241   _oop_got      = (oop*) _lib->load_symbol("JVM.oop.got");
 242   _oop_got_size = _lib->header()->_oop_got_size;
 243 
 244   // Collect stubs info
 245   _stubs_offsets = (int*) _lib->load_symbol("JVM.stubs.offsets");
 246 
 247   // code segments table
 248   _code_segments = (address) _lib->load_symbol("JVM.code.segments");
 249 
 250   // method state
 251   _method_state = (jlong*) _lib->load_symbol("JVM.meth.state");
 252 
 253   // Create a table for mapping classes
 254   _classes = NEW_C_HEAP_ARRAY(AOTClass, _class_count, mtCode);
 255   memset(_classes, 0, _class_count * sizeof(AOTClass));
 256 
 257   // Create table for searching AOTCompiledMethod based on pc.
 258   _code_to_aot = NEW_C_HEAP_ARRAY(CodeToAMethod, _method_count, mtCode);
 259   memset(_code_to_aot, 0, _method_count * sizeof(CodeToAMethod));
 260 
 261   _memory.set_low_boundary((char *)_code_space);
 262   _memory.set_high_boundary((char *)_code_space);
 263   _memory.set_low((char *)_code_space);
 264   _memory.set_high((char *)_code_space);
 265 
 266   _segmap.set_low_boundary((char *)_code_segments);
 267   _segmap.set_low((char *)_code_segments);
 268 
 269   _log2_segment_size = exact_log2(_lib->config()->_codeSegmentSize);
 270 
 271   // Register aot stubs
 272   register_stubs();
 273 
 274   if (PrintAOT || (PrintCompilation && PrintAOT)) {
 275     tty->print("%7d ", (int) tty->time_stamp().milliseconds());
 276     tty->print_cr("%4d     loaded    %s  aot library", _lib->id(), _lib->name());
 277   }
 278 }
 279 
 280 void AOTCodeHeap::publish_aot(const methodHandle& mh, AOTMethodData* method_data, int code_id) {
 281   // The method may be explicitly excluded by the user.
 282   // Or Interpreter uses an intrinsic for this method.
 283   if (CompilerOracle::should_exclude(mh) || !AbstractInterpreter::can_be_compiled(mh)) {
 284     return;
 285   }
 286 
 287   address code = method_data->_code;
 288   const char* name = method_data->_name;
 289   aot_metadata* meta = method_data->_meta;
 290 
 291   if (meta->scopes_pcs_begin() == meta->scopes_pcs_end()) {
 292     // When the AOT compiler compiles something big we fail to generate metadata
 293     // in CodeInstaller::gather_metadata. In that case the scopes_pcs_begin == scopes_pcs_end.
 294     // In all successful cases we always have 2 entries of scope pcs.
 295     log_info(aot, class, resolve)("Failed to load %s (no metadata available)", mh->name_and_sig_as_C_string());
 296     _code_to_aot[code_id]._state = invalid;
 297     return;
 298   }
 299 
 300   jlong* state_adr = &_method_state[code_id];
 301   address metadata_table = method_data->_metadata_table;
 302   int metadata_size = method_data->_metadata_size;
 303   assert(code_id < _method_count, "sanity");
 304   _aot_id++;
 305 
 306 #ifdef ASSERT
 307   if (_aot_id > CIStop || _aot_id < CIStart) {
 308     // Skip compilation
 309     return;
 310   }
 311 #endif
 312   // Check one more time.
 313   if (_code_to_aot[code_id]._state == invalid) {
 314     return;
 315   }
 316   AOTCompiledMethod *aot = new AOTCompiledMethod(code, mh(), meta, metadata_table, metadata_size, state_adr, this, name, code_id, _aot_id);
 317   assert(_code_to_aot[code_id]._aot == NULL, "should be not initialized");
 318   _code_to_aot[code_id]._aot = aot; // Should set this first
 319   if (Atomic::cmpxchg(in_use, &_code_to_aot[code_id]._state, not_set) != not_set) {
 320     _code_to_aot[code_id]._aot = NULL; // Clean
 321   } else { // success
 322     // Publish method
 323 #ifdef TIERED
 324     mh->set_aot_code(aot);
 325 #endif
 326     Method::set_code(mh, aot);
 327     if (PrintAOT || (PrintCompilation && PrintAOT)) {
 328       aot->print_on(tty, NULL);
 329     }
 330     // Publish oop only after we are visible to CompiledMethodIterator
 331     aot->set_oop(mh()->method_holder()->klass_holder());
 332   }
 333 }
 334 
 335 void AOTCodeHeap::link_primitive_array_klasses() {
 336   ResourceMark rm;
 337   for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) {
 338     BasicType t = (BasicType)i;
 339     if (is_java_primitive(t)) {
 340       const Klass* arr_klass = Universe::typeArrayKlassObj(t);
 341       AOTKlassData* klass_data = (AOTKlassData*) os::dll_lookup(_lib->dl_handle(), arr_klass->signature_name());
 342       if (klass_data != NULL) {
 343         // Set both GOT cells, resolved and initialized klass pointers.
 344         // _got_index points to second cell - resolved klass pointer.
 345         _metaspace_got[klass_data->_got_index-1] = (Metadata*)arr_klass; // Initialized
 346         _metaspace_got[klass_data->_got_index  ] = (Metadata*)arr_klass; // Resolved
 347         if (PrintAOT) {
 348           tty->print_cr("[Found  %s  in  %s]", arr_klass->internal_name(), _lib->name());
 349         }
 350       }
 351     }
 352   }
 353 }
 354 
 355 void AOTCodeHeap::register_stubs() {
 356   int stubs_count = _stubs_offsets[0]; // contains number
 357   _stubs_offsets++;
 358   AOTMethodOffsets* stub_offsets = (AOTMethodOffsets*)_stubs_offsets;
 359   for (int i = 0; i < stubs_count; ++i) {
 360     const char* stub_name = _metaspace_names + stub_offsets[i]._name_offset;
 361     address entry = _code_space  + stub_offsets[i]._code_offset;
 362     aot_metadata* meta = (aot_metadata *) (_method_metadata + stub_offsets[i]._meta_offset);
 363     address metadata_table = (address)_metadata_got + stub_offsets[i]._metadata_got_offset;
 364     int metadata_size = stub_offsets[i]._metadata_got_size;
 365     int code_id = stub_offsets[i]._code_id;
 366     assert(code_id < _method_count, "sanity");
 367     jlong* state_adr = &_method_state[code_id];
 368     int len = build_u2_from((address)stub_name);
 369     stub_name += 2;
 370     char* full_name = NEW_C_HEAP_ARRAY(char, len+5, mtCode);
 371     if (full_name == NULL) { // No memory?
 372       break;
 373     }
 374     memcpy(full_name, "AOT ", 4);
 375     memcpy(full_name+4, stub_name, len);
 376     full_name[len+4] = 0;
 377     guarantee(_code_to_aot[code_id]._state != invalid, "stub %s can't be invalidated", full_name);
 378     AOTCompiledMethod* aot = new AOTCompiledMethod(entry, NULL, meta, metadata_table, metadata_size, state_adr, this, full_name, code_id, i);
 379     assert(_code_to_aot[code_id]._aot  == NULL, "should be not initialized");
 380     _code_to_aot[code_id]._aot  = aot;
 381     if (Atomic::cmpxchg(in_use, &_code_to_aot[code_id]._state, not_set) != not_set) {
 382       fatal("stab '%s' code state is %d", full_name, _code_to_aot[code_id]._state);
 383     }
 384     // Adjust code buffer boundaries only for stubs because they are last in the buffer.
 385     adjust_boundaries(aot);
 386     if (PrintAOT && Verbose) {
 387       aot->print_on(tty, NULL);
 388     }
 389   }
 390 }
 391 
 392 #define SET_AOT_GLOBAL_SYMBOL_VALUE(AOTSYMNAME, AOTSYMTYPE, VMSYMVAL) \
 393   {                                                                   \
 394     AOTSYMTYPE * adr = (AOTSYMTYPE *) os::dll_lookup(_lib->dl_handle(), AOTSYMNAME);  \
 395     /* Check for a lookup error */                                    \
 396     guarantee(adr != NULL, "AOT Symbol not found %s", AOTSYMNAME);    \
 397     *adr = (AOTSYMTYPE) VMSYMVAL;                                     \
 398   }
 399 
 400 void AOTCodeHeap::link_graal_runtime_symbols()  {
 401     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_monitorenter", address, JVMCIRuntime::monitorenter);
 402     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_monitorexit", address, JVMCIRuntime::monitorexit);
 403     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_log_object", address, JVMCIRuntime::log_object);
 404     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_log_printf", address, JVMCIRuntime::log_printf);
 405     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_log_primitive", address, JVMCIRuntime::log_primitive);
 406     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_new_instance", address, JVMCIRuntime::new_instance);
 407     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_new_array", address, JVMCIRuntime::new_array);
 408     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_new_multi_array", address, JVMCIRuntime::new_multi_array);
 409     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_dynamic_new_array", address, JVMCIRuntime::dynamic_new_array);
 410     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_validate_object", address, JVMCIRuntime::validate_object);
 411     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_write_barrier_pre", address, JVMCIRuntime::write_barrier_pre);
 412     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_identity_hash_code", address, JVMCIRuntime::identity_hash_code);
 413     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_write_barrier_post", address, JVMCIRuntime::write_barrier_post);
 414     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_dynamic_new_instance", address, JVMCIRuntime::dynamic_new_instance);
 415     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_thread_is_interrupted", address, JVMCIRuntime::thread_is_interrupted);
 416     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_exception_handler_for_pc", address, JVMCIRuntime::exception_handler_for_pc);
 417     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_test_deoptimize_call_int", address, JVMCIRuntime::test_deoptimize_call_int);
 418     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_throw_and_post_jvmti_exception", address, JVMCIRuntime::throw_and_post_jvmti_exception);
 419     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_throw_klass_external_name_exception", address, JVMCIRuntime::throw_klass_external_name_exception);
 420     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_throw_class_cast_exception", address, JVMCIRuntime::throw_class_cast_exception);
 421     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_vm_message", address, JVMCIRuntime::vm_message);
 422     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_jvmci_runtime_vm_error", address, JVMCIRuntime::vm_error);
 423 }
 424 
 425 void AOTCodeHeap::link_shared_runtime_symbols() {
 426     SET_AOT_GLOBAL_SYMBOL_VALUE("_resolve_static_entry", address, SharedRuntime::get_resolve_static_call_stub());
 427     SET_AOT_GLOBAL_SYMBOL_VALUE("_resolve_virtual_entry", address, SharedRuntime::get_resolve_virtual_call_stub());
 428     SET_AOT_GLOBAL_SYMBOL_VALUE("_resolve_opt_virtual_entry", address, SharedRuntime::get_resolve_opt_virtual_call_stub());
 429     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_deopt_blob_unpack", address, SharedRuntime::deopt_blob()->unpack());
 430     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_deopt_blob_uncommon_trap", address, SharedRuntime::deopt_blob()->uncommon_trap());
 431     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_ic_miss_stub", address, SharedRuntime::get_ic_miss_stub());
 432     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_handle_wrong_method_stub", address, SharedRuntime::get_handle_wrong_method_stub());
 433     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_exception_handler_for_return_address", address, SharedRuntime::exception_handler_for_return_address);
 434     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_register_finalizer", address, SharedRuntime::register_finalizer);
 435     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_OSR_migration_end", address, SharedRuntime::OSR_migration_end);
 436     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_resolve_string_by_symbol", address, CompilerRuntime::resolve_string_by_symbol);
 437     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_resolve_klass_by_symbol", address, CompilerRuntime::resolve_klass_by_symbol);
 438     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_resolve_method_by_symbol_and_load_counters", address, CompilerRuntime::resolve_method_by_symbol_and_load_counters);
 439     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_initialize_klass_by_symbol", address, CompilerRuntime::initialize_klass_by_symbol);
 440     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_invocation_event", address, CompilerRuntime::invocation_event);
 441     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_backedge_event", address, CompilerRuntime::backedge_event);
 442 
 443     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_shared_runtime_dpow", address, SharedRuntime::dpow);
 444     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_shared_runtime_dexp", address, SharedRuntime::dexp);
 445     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_shared_runtime_dcos", address, SharedRuntime::dcos);
 446     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_shared_runtime_dsin", address, SharedRuntime::dsin);
 447     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_shared_runtime_dtan", address, SharedRuntime::dtan);
 448     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_shared_runtime_dlog", address, SharedRuntime::dlog);
 449     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_shared_runtime_dlog10", address, SharedRuntime::dlog10);
 450 }
 451 
 452 void AOTCodeHeap::link_stub_routines_symbols() {
 453     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_jbyte_arraycopy", address, StubRoutines::_jbyte_arraycopy);
 454     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_jshort_arraycopy", address, StubRoutines::_jshort_arraycopy);
 455     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_jint_arraycopy", address, StubRoutines::_jint_arraycopy);
 456     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_jlong_arraycopy", address, StubRoutines::_jlong_arraycopy);
 457     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_oop_arraycopy", address, StubRoutines::_oop_arraycopy);
 458     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_oop_arraycopy_uninit", address, StubRoutines::_oop_arraycopy_uninit);
 459 
 460     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_jbyte_disjoint_arraycopy", address, StubRoutines::_jbyte_disjoint_arraycopy);
 461     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_jshort_disjoint_arraycopy", address, StubRoutines::_jshort_disjoint_arraycopy);
 462     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_jint_disjoint_arraycopy", address, StubRoutines::_jint_disjoint_arraycopy);
 463     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_jlong_disjoint_arraycopy", address, StubRoutines::_jlong_disjoint_arraycopy);
 464     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_oop_disjoint_arraycopy", address, StubRoutines::_oop_disjoint_arraycopy);
 465     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_oop_disjoint_arraycopy_uninit", address, StubRoutines::_oop_disjoint_arraycopy_uninit);
 466 
 467     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_arrayof_jbyte_arraycopy", address, StubRoutines::_arrayof_jbyte_arraycopy);
 468     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_arrayof_jshort_arraycopy", address, StubRoutines::_arrayof_jshort_arraycopy);
 469     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_arrayof_jint_arraycopy", address, StubRoutines::_arrayof_jint_arraycopy);
 470     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_arrayof_jlong_arraycopy", address, StubRoutines::_arrayof_jlong_arraycopy);
 471     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_arrayof_oop_arraycopy", address, StubRoutines::_arrayof_oop_arraycopy);
 472     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_arrayof_oop_arraycopy_uninit", address, StubRoutines::_arrayof_oop_arraycopy_uninit);
 473 
 474     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_arrayof_jbyte_disjoint_arraycopy", address, StubRoutines::_arrayof_jbyte_disjoint_arraycopy);
 475     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_arrayof_jshort_disjoint_arraycopy", address, StubRoutines::_arrayof_jshort_disjoint_arraycopy);
 476     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_arrayof_jint_disjoint_arraycopy", address, StubRoutines::_arrayof_jint_disjoint_arraycopy);
 477     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_arrayof_jlong_disjoint_arraycopy", address, StubRoutines::_arrayof_jlong_disjoint_arraycopy);
 478     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_arrayof_oop_disjoint_arraycopy", address, StubRoutines::_arrayof_oop_disjoint_arraycopy);
 479     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_arrayof_oop_disjoint_arraycopy_uninit", address, StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit);
 480 
 481     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_checkcast_arraycopy", address, StubRoutines::_checkcast_arraycopy);
 482 
 483     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_aescrypt_encryptBlock", address, StubRoutines::_aescrypt_encryptBlock);
 484     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_aescrypt_decryptBlock", address, StubRoutines::_aescrypt_decryptBlock);
 485     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_cipherBlockChaining_encryptAESCrypt", address, StubRoutines::_cipherBlockChaining_encryptAESCrypt);
 486     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_cipherBlockChaining_decryptAESCrypt", address, StubRoutines::_cipherBlockChaining_decryptAESCrypt);
 487     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_update_bytes_crc32", address, StubRoutines::_updateBytesCRC32);
 488     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_crc_table_adr", address, StubRoutines::_crc_table_adr);
 489 
 490 
 491     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_sha1_implCompress", address, StubRoutines::_sha1_implCompress);
 492     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_sha1_implCompressMB", address, StubRoutines::_sha1_implCompressMB);
 493     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_sha256_implCompress", address, StubRoutines::_sha256_implCompress);
 494     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_sha256_implCompressMB", address, StubRoutines::_sha256_implCompressMB);
 495     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_sha512_implCompress", address, StubRoutines::_sha512_implCompress);
 496     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_sha512_implCompressMB", address, StubRoutines::_sha512_implCompressMB);
 497     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_multiplyToLen", address, StubRoutines::_multiplyToLen);
 498 
 499     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_counterMode_AESCrypt", address, StubRoutines::_counterMode_AESCrypt);
 500     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_ghash_processBlocks", address, StubRoutines::_ghash_processBlocks);
 501     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_crc32c_table_addr", address, StubRoutines::_crc32c_table_addr);
 502     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_updateBytesCRC32C", address, StubRoutines::_updateBytesCRC32C);
 503     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_updateBytesAdler32", address, StubRoutines::_updateBytesAdler32);
 504     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_squareToLen", address, StubRoutines::_squareToLen);
 505     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_mulAdd", address, StubRoutines::_mulAdd);
 506     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_montgomeryMultiply",  address, StubRoutines::_montgomeryMultiply);
 507     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_montgomerySquare", address, StubRoutines::_montgomerySquare);
 508     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_vectorizedMismatch", address, StubRoutines::_vectorizedMismatch);
 509 
 510     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_stub_routines_throw_delayed_StackOverflowError_entry", address, StubRoutines::_throw_delayed_StackOverflowError_entry);
 511 
 512 }
 513 
 514 void AOTCodeHeap::link_os_symbols() {
 515     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_os_javaTimeMillis", address, os::javaTimeMillis);
 516     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_os_javaTimeNanos", address, os::javaTimeNanos);
 517 }
 518 
 519 /*
 520  * Link any global symbols in precompiled DSO with dlopen() _dl_handle
 521  * dso_handle.
 522  */
 523 
 524 void AOTCodeHeap::link_global_lib_symbols() {
 525   if (!_lib_symbols_initialized) {
 526     _lib_symbols_initialized = true;
 527 
 528     CollectedHeap* heap = Universe::heap();
 529     CardTableModRefBS* ct = (CardTableModRefBS*)(heap->barrier_set());
 530     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_card_table_address", address, ct->byte_map_base);
 531     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_heap_top_address", address, (heap->supports_inline_contig_alloc() ? heap->top_addr() : NULL));
 532     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_heap_end_address", address, (heap->supports_inline_contig_alloc() ? heap->end_addr() : NULL));
 533     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_polling_page", address, os::get_polling_page());
 534     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_narrow_klass_base_address", address, Universe::narrow_klass_base());
 535     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_narrow_oop_base_address", address, Universe::narrow_oop_base());
 536     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_log_of_heap_region_grain_bytes", int, HeapRegion::LogOfHRGrainBytes);
 537     SET_AOT_GLOBAL_SYMBOL_VALUE("_aot_inline_contiguous_allocation_supported", bool, heap->supports_inline_contig_alloc());
 538     link_shared_runtime_symbols();
 539     link_stub_routines_symbols();
 540     link_os_symbols();
 541     link_graal_runtime_symbols();
 542 
 543     // Link primitive array klasses.
 544     link_primitive_array_klasses();
 545   }
 546 }
 547 
 548 #ifndef PRODUCT
 549 int AOTCodeHeap::klasses_seen = 0;
 550 int AOTCodeHeap::aot_klasses_found = 0;
 551 int AOTCodeHeap::aot_klasses_fp_miss = 0;
 552 int AOTCodeHeap::aot_klasses_cl_miss = 0;
 553 int AOTCodeHeap::aot_methods_found = 0;
 554 
 555 void AOTCodeHeap::print_statistics() {
 556   tty->print_cr("Classes seen: %d  AOT classes found: %d  AOT methods found: %d", klasses_seen, aot_klasses_found, aot_methods_found);
 557   tty->print_cr("AOT fingerprint mismatches: %d  AOT class loader mismatches: %d", aot_klasses_fp_miss, aot_klasses_cl_miss);
 558 }
 559 #endif
 560 
 561 Method* AOTCodeHeap::find_method(Klass* klass, Thread* thread, const char* method_name) {
 562   int method_name_len = build_u2_from((address)method_name);
 563   method_name += 2;
 564   const char* signature_name = method_name + method_name_len;
 565   int signature_name_len = build_u2_from((address)signature_name);
 566   signature_name += 2;
 567   // The class should have been loaded so the method and signature should already be
 568   // in the symbol table.  If they're not there, the method doesn't exist.
 569   TempNewSymbol name = SymbolTable::probe(method_name, method_name_len);
 570   TempNewSymbol signature = SymbolTable::probe(signature_name, signature_name_len);
 571 
 572   Method* m;
 573   if (name == NULL || signature == NULL) {
 574     m = NULL;
 575   } else if (name == vmSymbols::object_initializer_name() ||
 576              name == vmSymbols::class_initializer_name()) {
 577     // Never search superclasses for constructors
 578     if (klass->is_instance_klass()) {
 579       m = InstanceKlass::cast(klass)->find_method(name, signature);
 580     } else {
 581       m = NULL;
 582     }
 583   } else {
 584     m = klass->lookup_method(name, signature);
 585     if (m == NULL && klass->is_instance_klass()) {
 586       m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
 587     }
 588   }
 589   if (m == NULL) {
 590     // Fatal error because we assume classes and methods should not be changed since aot compilation.
 591     const char* klass_name = klass->external_name();
 592     int klass_len = (int)strlen(klass_name);
 593     char* meta_name = NEW_RESOURCE_ARRAY(char, klass_len + 1 + method_name_len + signature_name_len + 1);
 594     memcpy(meta_name, klass_name, klass_len);
 595     meta_name[klass_len] = '.';
 596     memcpy(&meta_name[klass_len + 1], method_name, method_name_len);
 597     memcpy(&meta_name[klass_len + 1 + method_name_len], signature_name, signature_name_len);
 598     meta_name[klass_len + 1 + method_name_len + signature_name_len] = '\0';
 599     Handle exception = Exceptions::new_exception(thread, vmSymbols::java_lang_NoSuchMethodError(), meta_name);
 600     java_lang_Throwable::print(exception(), tty);
 601     tty->cr();
 602     java_lang_Throwable::print_stack_trace(exception, tty);
 603     tty->cr();
 604     fatal("Failed to find method '%s'", meta_name);
 605   }
 606   NOT_PRODUCT( aot_methods_found++; )
 607   return m;
 608 }
 609 
 610 AOTKlassData* AOTCodeHeap::find_klass(InstanceKlass* ik) {
 611   ResourceMark rm;
 612   AOTKlassData* klass_data = (AOTKlassData*) os::dll_lookup(_lib->dl_handle(), ik->signature_name());
 613   return klass_data;
 614 }
 615 
 616 bool AOTCodeHeap::is_dependent_method(Klass* dependee, AOTCompiledMethod* aot) {
 617   InstanceKlass *dependee_ik = InstanceKlass::cast(dependee);
 618   AOTKlassData* klass_data = find_klass(dependee_ik);
 619   if (klass_data == NULL) {
 620     return false; // no AOT records for this class - no dependencies
 621   }
 622   if (!dependee_ik->has_passed_fingerprint_check()) {
 623     return false; // different class
 624   }
 625 
 626   int methods_offset = klass_data->_dependent_methods_offset;
 627   if (methods_offset >= 0) {
 628     address methods_cnt_adr = _dependencies + methods_offset;
 629     int methods_cnt = *(int*)methods_cnt_adr;
 630     int* indexes = (int*)(methods_cnt_adr + 4);
 631     for (int i = 0; i < methods_cnt; ++i) {
 632       int code_id = indexes[i];
 633       if (_code_to_aot[code_id]._aot == aot) {
 634         return true; // found dependent method
 635       }
 636     }
 637   }
 638   return false;
 639 }
 640 
 641 void AOTCodeHeap::sweep_dependent_methods(AOTKlassData* klass_data) {
 642   // Make dependent methods non_entrant forever.
 643   int methods_offset = klass_data->_dependent_methods_offset;
 644   if (methods_offset >= 0) {
 645     int marked = 0;
 646     address methods_cnt_adr = _dependencies + methods_offset;
 647     int methods_cnt = *(int*)methods_cnt_adr;
 648     int* indexes = (int*)(methods_cnt_adr + 4);
 649     for (int i = 0; i < methods_cnt; ++i) {
 650       int code_id = indexes[i];
 651       // Invalidate aot code.
 652       if (Atomic::cmpxchg(invalid, &_code_to_aot[code_id]._state, not_set) != not_set) {
 653         if (_code_to_aot[code_id]._state == in_use) {
 654           AOTCompiledMethod* aot = _code_to_aot[code_id]._aot;
 655           assert(aot != NULL, "aot should be set");
 656           if (!aot->is_runtime_stub()) { // Something is wrong - should not invalidate stubs.
 657             aot->mark_for_deoptimization(false);
 658             marked++;
 659           }
 660         }
 661       }
 662     }
 663     if (marked > 0) {
 664       VM_Deoptimize op;
 665       VMThread::execute(&op);
 666     }
 667   }
 668 }
 669 
 670 bool AOTCodeHeap::load_klass_data(InstanceKlass* ik, Thread* thread) {
 671   ResourceMark rm;
 672 
 673   NOT_PRODUCT( klasses_seen++; )
 674 
 675   AOTKlassData* klass_data = find_klass(ik);
 676   if (klass_data == NULL) {
 677     return false;
 678   }
 679 
 680   if (!ik->has_passed_fingerprint_check()) {
 681     NOT_PRODUCT( aot_klasses_fp_miss++; )
 682     log_trace(aot, class, fingerprint)("class  %s%s  has bad fingerprint in  %s tid=" INTPTR_FORMAT,
 683                                    ik->internal_name(), ik->is_shared() ? " (shared)" : "",
 684                                    _lib->name(), p2i(thread));
 685     sweep_dependent_methods(klass_data);
 686     return false;
 687   }
 688 
 689   if (ik->has_been_redefined()) {
 690     log_trace(aot, class, load)("class  %s%s in %s  has been redefined tid=" INTPTR_FORMAT,
 691                                    ik->internal_name(), ik->is_shared() ? " (shared)" : "",
 692                                    _lib->name(), p2i(thread));
 693     sweep_dependent_methods(klass_data);
 694     return false;
 695   }
 696 
 697   assert(klass_data->_class_id < _class_count, "invalid class id");
 698   AOTClass* aot_class = &_classes[klass_data->_class_id];
 699   if (aot_class->_classloader != NULL && aot_class->_classloader != ik->class_loader_data()) {
 700     log_trace(aot, class, load)("class  %s  in  %s already loaded for classloader %p vs %p tid=" INTPTR_FORMAT,
 701                              ik->internal_name(), _lib->name(), aot_class->_classloader, ik->class_loader_data(), p2i(thread));
 702     NOT_PRODUCT( aot_klasses_cl_miss++; )
 703     return false;
 704   }
 705 
 706   if (_lib->config()->_omitAssertions && JavaAssertions::enabled(ik->name()->as_C_string(), ik->class_loader() == NULL)) {
 707     log_trace(aot, class, load)("class  %s  in  %s does not have java assertions in compiled code, but assertions are enabled for this execution.", ik->internal_name(), _lib->name());
 708     sweep_dependent_methods(klass_data);
 709     return false;
 710   }
 711 
 712   NOT_PRODUCT( aot_klasses_found++; )
 713 
 714   log_trace(aot, class, load)("found  %s  in  %s for classloader %p tid=" INTPTR_FORMAT, ik->internal_name(), _lib->name(), ik->class_loader_data(), p2i(thread));
 715 
 716   aot_class->_classloader = ik->class_loader_data();
 717   // Set klass's Resolve (second) got cell.
 718   _metaspace_got[klass_data->_got_index] = ik;
 719 
 720   // Initialize global symbols of the DSO to the corresponding VM symbol values.
 721   link_global_lib_symbols();
 722 
 723   int methods_offset = klass_data->_compiled_methods_offset;
 724   if (methods_offset >= 0) {
 725     address methods_cnt_adr = _methods_offsets + methods_offset;
 726     int methods_cnt = *(int*)methods_cnt_adr;
 727     // Collect data about compiled methods
 728     AOTMethodData* methods_data = NEW_RESOURCE_ARRAY(AOTMethodData, methods_cnt);
 729     AOTMethodOffsets* methods_offsets = (AOTMethodOffsets*)(methods_cnt_adr + 4);
 730     for (int i = 0; i < methods_cnt; ++i) {
 731       AOTMethodOffsets* method_offsets = &methods_offsets[i];
 732       int code_id = method_offsets->_code_id;
 733       if (_code_to_aot[code_id]._state == invalid) {
 734         continue; // skip AOT methods slots which have been invalidated
 735       }
 736       AOTMethodData* method_data = &methods_data[i];
 737       const char* aot_name = _metaspace_names + method_offsets->_name_offset;
 738       method_data->_name = aot_name;
 739       method_data->_code = _code_space  + method_offsets->_code_offset;
 740       method_data->_meta = (aot_metadata*)(_method_metadata + method_offsets->_meta_offset);
 741       method_data->_metadata_table = (address)_metadata_got + method_offsets->_metadata_got_offset;
 742       method_data->_metadata_size  = method_offsets->_metadata_got_size;
 743       // aot_name format: "<u2_size>Ljava/lang/ThreadGroup;<u2_size>addUnstarted<u2_size>()V"
 744       int klass_len = build_u2_from((address)aot_name);
 745       const char* method_name = aot_name + 2 + klass_len;
 746       Method* m = AOTCodeHeap::find_method(ik, thread, method_name);
 747       methodHandle mh(thread, m);
 748       if (mh->code() != NULL) { // Does it have already compiled code?
 749         continue; // Don't overwrite
 750       }
 751       publish_aot(mh, method_data, code_id);
 752     }
 753   }
 754   return true;
 755 }
 756 
 757 AOTCompiledMethod* AOTCodeHeap::next_in_use_at(int start) const {
 758   for (int index = start; index < _method_count; index++) {
 759     if (_code_to_aot[index]._state != in_use) {
 760       continue; // Skip uninitialized entries.
 761     }
 762     AOTCompiledMethod* aot = _code_to_aot[index]._aot;
 763     return aot;
 764   }
 765   return NULL;
 766 }
 767 
 768 void* AOTCodeHeap::first() const {
 769   return next_in_use_at(0);
 770 }
 771 
 772 void* AOTCodeHeap::next(void* p) const {
 773   AOTCompiledMethod *aot = (AOTCompiledMethod *)p;
 774   int next_index = aot->method_index() + 1;
 775   assert(next_index <= _method_count, "");
 776   if (next_index == _method_count) {
 777     return NULL;
 778   }
 779   return next_in_use_at(next_index);
 780 }
 781 
 782 void* AOTCodeHeap::find_start(void* p) const {
 783   if (!contains(p)) {
 784     return NULL;
 785   }
 786   size_t offset = pointer_delta(p, low_boundary(), 1);
 787   // Use segments table
 788   size_t seg_idx = offset / _lib->config()->_codeSegmentSize;
 789   if ((int)(_code_segments[seg_idx]) == 0xff) {
 790     return NULL;
 791   }
 792   while (_code_segments[seg_idx] > 0) {
 793     seg_idx -= (int)_code_segments[seg_idx];
 794   }
 795   int code_offset = (int)seg_idx * _lib->config()->_codeSegmentSize;
 796   int aot_index = *(int*)(_code_space + code_offset);
 797   AOTCompiledMethod* aot = _code_to_aot[aot_index]._aot;
 798   assert(aot != NULL, "should find registered aot method");
 799   return aot;
 800 }
 801 
 802 AOTCompiledMethod* AOTCodeHeap::find_aot(address p) const {
 803   assert(contains(p), "should be here");
 804   return (AOTCompiledMethod *)find_start(p);
 805 }
 806 
 807 CodeBlob* AOTCodeHeap::find_blob_unsafe(void* start) const {
 808   return (CodeBlob*)AOTCodeHeap::find_start(start);
 809 }
 810 
 811 void AOTCodeHeap::oops_do(OopClosure* f) {
 812   for (int i = 0; i < _oop_got_size; i++) {
 813     oop* p = &_oop_got[i];
 814     if (*p == NULL)  continue;  // skip non-oops
 815     f->do_oop(p);
 816   }
 817   for (int index = 0; index < _method_count; index++) {
 818     if (_code_to_aot[index]._state != in_use) {
 819       continue; // Skip uninitialized entries.
 820     }
 821     AOTCompiledMethod* aot = _code_to_aot[index]._aot;
 822     aot->do_oops(f);
 823   }
 824 }
 825 
 826 // Scan only metaspace_got cells which should have only Klass*,
 827 // metadata_got cells are scanned only for alive AOT methods
 828 // by AOTCompiledMethod::metadata_do().
 829 void AOTCodeHeap::got_metadata_do(void f(Metadata*)) {
 830   for (int i = 1; i < _metaspace_got_size; i++) {
 831     Metadata** p = &_metaspace_got[i];
 832     Metadata* md = *p;
 833     if (md == NULL)  continue;  // skip non-oops
 834     if (Metaspace::contains(md)) {
 835       f(md);
 836     } else {
 837       intptr_t meta = (intptr_t)md;
 838       fatal("Invalid value in _metaspace_got[%d] = " INTPTR_FORMAT, i, meta);
 839     }
 840   }
 841 }
 842 
 843 void AOTCodeHeap::cleanup_inline_caches() {
 844   for (int index = 0; index < _method_count; index++) {
 845     if (_code_to_aot[index]._state != in_use) {
 846       continue; // Skip uninitialized entries.
 847     }
 848     AOTCompiledMethod* aot = _code_to_aot[index]._aot;
 849     aot->cleanup_inline_caches();
 850   }
 851 }
 852 
 853 #ifdef ASSERT
 854 int AOTCodeHeap::verify_icholder_relocations() {
 855   int count = 0;
 856   for (int index = 0; index < _method_count; index++) {
 857     if (_code_to_aot[index]._state != in_use) {
 858       continue; // Skip uninitialized entries.
 859     }
 860     AOTCompiledMethod* aot = _code_to_aot[index]._aot;
 861     count += aot->verify_icholder_relocations();
 862   }
 863   return count;
 864 }
 865 #endif
 866 
 867 void AOTCodeHeap::flush_evol_dependents_on(InstanceKlass* dependee) {
 868   for (int index = 0; index < _method_count; index++) {
 869     if (_code_to_aot[index]._state != in_use) {
 870       continue; // Skip uninitialized entries.
 871     }
 872     AOTCompiledMethod* aot = _code_to_aot[index]._aot;
 873     aot->flush_evol_dependents_on(dependee);
 874   }
 875 }
 876 
 877 void AOTCodeHeap::metadata_do(void f(Metadata*)) {
 878   for (int index = 0; index < _method_count; index++) {
 879     if (_code_to_aot[index]._state != in_use) {
 880       continue; // Skip uninitialized entries.
 881     }
 882     AOTCompiledMethod* aot = _code_to_aot[index]._aot;
 883     if (aot->_is_alive()) {
 884       aot->metadata_do(f);
 885     }
 886   }
 887   // Scan metaspace_got cells.
 888   got_metadata_do(f);
 889 }