1 /*
   2  * Copyright (c) 2011, 2016, 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 #include "code/compiledIC.hpp"
  26 #include "compiler/compileBroker.hpp"
  27 #include "compiler/disassembler.hpp"
  28 #include "oops/oop.inline.hpp"
  29 #include "oops/objArrayOop.inline.hpp"
  30 #include "runtime/javaCalls.hpp"
  31 #include "jvmci/jvmciEnv.hpp"
  32 #include "jvmci/jvmciCompiler.hpp"
  33 #include "jvmci/jvmciCodeInstaller.hpp"
  34 #include "jvmci/jvmciJavaClasses.hpp"
  35 #include "jvmci/jvmciCompilerToVM.hpp"
  36 #include "jvmci/jvmciRuntime.hpp"
  37 #include "asm/register.hpp"
  38 #include "classfile/vmSymbols.hpp"
  39 #include "code/vmreg.hpp"
  40 
  41 #ifdef TARGET_ARCH_x86
  42 # include "vmreg_x86.inline.hpp"
  43 #endif
  44 #ifdef TARGET_ARCH_sparc
  45 # include "vmreg_sparc.inline.hpp"
  46 #endif
  47 #ifdef TARGET_ARCH_zero
  48 # include "vmreg_zero.inline.hpp"
  49 #endif
  50 #ifdef TARGET_ARCH_arm
  51 # include "vmreg_arm.inline.hpp"
  52 #endif
  53 #ifdef TARGET_ARCH_ppc
  54 # include "vmreg_ppc.inline.hpp"
  55 #endif
  56 
  57 
  58 // frequently used constants
  59 // Allocate them with new so they are never destroyed (otherwise, a
  60 // forced exit could destroy these objects while they are still in
  61 // use).
  62 ConstantOopWriteValue* CodeInstaller::_oop_null_scope_value = new (ResourceObj::C_HEAP, mtCompiler) ConstantOopWriteValue(NULL);
  63 ConstantIntValue*      CodeInstaller::_int_m1_scope_value = new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(-1);
  64 ConstantIntValue*      CodeInstaller::_int_0_scope_value =  new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(0);
  65 ConstantIntValue*      CodeInstaller::_int_1_scope_value =  new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(1);
  66 ConstantIntValue*      CodeInstaller::_int_2_scope_value =  new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(2);
  67 LocationValue*         CodeInstaller::_illegal_value = new (ResourceObj::C_HEAP, mtCompiler) LocationValue(Location());
  68 
  69 Method* getMethodFromHotSpotMethod(oop hotspot_method) {
  70   assert(hotspot_method != NULL && hotspot_method->is_a(HotSpotResolvedJavaMethodImpl::klass()), "sanity");
  71   return CompilerToVM::asMethod(hotspot_method);
  72 }
  73 
  74 VMReg getVMRegFromLocation(Handle location, int total_frame_size, TRAPS) {
  75   if (location.is_null()) {
  76     THROW_NULL(vmSymbols::java_lang_NullPointerException());
  77   }
  78 
  79   Handle reg = code_Location::reg(location);
  80   jint offset = code_Location::offset(location);
  81 
  82   if (reg.not_null()) {
  83     // register
  84     jint number = code_Register::number(reg);
  85     VMReg vmReg = CodeInstaller::get_hotspot_reg(number, CHECK_NULL);
  86     if (offset % 4 == 0) {
  87       return vmReg->next(offset / 4);
  88     } else {
  89       JVMCI_ERROR_NULL("unaligned subregister offset %d in oop map", offset);
  90     }
  91   } else {
  92     // stack slot
  93     if (offset % 4 == 0) {
  94       return VMRegImpl::stack2reg(offset / 4);
  95     } else {
  96       JVMCI_ERROR_NULL("unaligned stack offset %d in oop map", offset);
  97     }
  98   }
  99 }
 100 
 101 // creates a HotSpot oop map out of the byte arrays provided by DebugInfo
 102 OopMap* CodeInstaller::create_oop_map(Handle debug_info, TRAPS) {
 103   Handle reference_map = DebugInfo::referenceMap(debug_info);
 104   if (reference_map.is_null()) {
 105     THROW_NULL(vmSymbols::java_lang_NullPointerException());
 106   }
 107   if (!reference_map->is_a(HotSpotReferenceMap::klass())) {
 108     JVMCI_ERROR_NULL("unknown reference map: %s", reference_map->klass()->signature_name());
 109   }
 110   if (HotSpotReferenceMap::maxRegisterSize(reference_map) > 16) {
 111     _has_wide_vector = true;
 112   }
 113   OopMap* map = new OopMap(_total_frame_size, _parameter_count);
 114   objArrayHandle objects = HotSpotReferenceMap::objects(reference_map);
 115   objArrayHandle derivedBase = HotSpotReferenceMap::derivedBase(reference_map);
 116   typeArrayHandle sizeInBytes = HotSpotReferenceMap::sizeInBytes(reference_map);
 117   if (objects.is_null() || derivedBase.is_null() || sizeInBytes.is_null()) {
 118     THROW_NULL(vmSymbols::java_lang_NullPointerException());
 119   }
 120   if (objects->length() != derivedBase->length() || objects->length() != sizeInBytes->length()) {
 121     JVMCI_ERROR_NULL("arrays in reference map have different sizes: %d %d %d", objects->length(), derivedBase->length(), sizeInBytes->length());
 122   }
 123   for (int i = 0; i < objects->length(); i++) {
 124     Handle location = objects->obj_at(i);
 125     Handle baseLocation = derivedBase->obj_at(i);
 126     int bytes = sizeInBytes->int_at(i);
 127 
 128     VMReg vmReg = getVMRegFromLocation(location, _total_frame_size, CHECK_NULL);
 129     if (baseLocation.not_null()) {
 130       // derived oop
 131 #ifdef _LP64
 132       if (bytes == 8) {
 133 #else
 134       if (bytes == 4) {
 135 #endif
 136         VMReg baseReg = getVMRegFromLocation(baseLocation, _total_frame_size, CHECK_NULL);
 137         map->set_derived_oop(vmReg, baseReg);
 138       } else {
 139         JVMCI_ERROR_NULL("invalid derived oop size in ReferenceMap: %d", bytes);
 140       }
 141 #ifdef _LP64
 142     } else if (bytes == 8) {
 143       // wide oop
 144       map->set_oop(vmReg);
 145     } else if (bytes == 4) {
 146       // narrow oop
 147       map->set_narrowoop(vmReg);
 148 #else
 149     } else if (bytes == 4) {
 150       map->set_oop(vmReg);
 151 #endif
 152     } else {
 153       JVMCI_ERROR_NULL("invalid oop size in ReferenceMap: %d", bytes);
 154     }
 155   }
 156 
 157   Handle callee_save_info = (oop) DebugInfo::calleeSaveInfo(debug_info);
 158   if (callee_save_info.not_null()) {
 159     objArrayHandle registers = RegisterSaveLayout::registers(callee_save_info);
 160     typeArrayHandle slots = RegisterSaveLayout::slots(callee_save_info);
 161     for (jint i = 0; i < slots->length(); i++) {
 162       Handle jvmci_reg = registers->obj_at(i);
 163       jint jvmci_reg_number = code_Register::number(jvmci_reg);
 164       VMReg hotspot_reg = CodeInstaller::get_hotspot_reg(jvmci_reg_number, CHECK_NULL);
 165       // HotSpot stack slots are 4 bytes
 166       jint jvmci_slot = slots->int_at(i);
 167       jint hotspot_slot = jvmci_slot * VMRegImpl::slots_per_word;
 168       VMReg hotspot_slot_as_reg = VMRegImpl::stack2reg(hotspot_slot);
 169       map->set_callee_saved(hotspot_slot_as_reg, hotspot_reg);
 170 #ifdef _LP64
 171       // (copied from generate_oop_map() in c1_Runtime1_x86.cpp)
 172       VMReg hotspot_slot_hi_as_reg = VMRegImpl::stack2reg(hotspot_slot + 1);
 173       map->set_callee_saved(hotspot_slot_hi_as_reg, hotspot_reg->next());
 174 #endif
 175     }
 176   }
 177   return map;
 178 }
 179 
 180 Metadata* CodeInstaller::record_metadata_reference(Handle constant, TRAPS) {
 181   oop obj = HotSpotMetaspaceConstantImpl::metaspaceObject(constant);
 182   if (obj->is_a(HotSpotResolvedObjectTypeImpl::klass())) {
 183     Klass* klass = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(obj));
 184     assert(!HotSpotMetaspaceConstantImpl::compressed(constant), "unexpected compressed klass pointer %s @ " INTPTR_FORMAT, klass->name()->as_C_string(), p2i(klass));
 185     int index = _oop_recorder->find_index(klass);
 186     TRACE_jvmci_3("metadata[%d of %d] = %s", index, _oop_recorder->metadata_count(), klass->name()->as_C_string());
 187     return klass;
 188   } else if (obj->is_a(HotSpotResolvedJavaMethodImpl::klass())) {
 189     Method* method = (Method*) (address) HotSpotResolvedJavaMethodImpl::metaspaceMethod(obj);
 190     assert(!HotSpotMetaspaceConstantImpl::compressed(constant), "unexpected compressed method pointer %s @ " INTPTR_FORMAT, method->name()->as_C_string(), p2i(method));
 191     int index = _oop_recorder->find_index(method);
 192     TRACE_jvmci_3("metadata[%d of %d] = %s", index, _oop_recorder->metadata_count(), method->name()->as_C_string());
 193     return method;
 194   } else {
 195     JVMCI_ERROR_NULL("unexpected metadata reference for constant of type %s", obj->klass()->signature_name());
 196   }
 197 }
 198 
 199 #ifdef _LP64
 200 narrowKlass CodeInstaller::record_narrow_metadata_reference(Handle constant, TRAPS) {
 201   oop obj = HotSpotMetaspaceConstantImpl::metaspaceObject(constant);
 202   assert(HotSpotMetaspaceConstantImpl::compressed(constant), "unexpected uncompressed pointer");
 203 
 204   if (!obj->is_a(HotSpotResolvedObjectTypeImpl::klass())) {
 205     JVMCI_ERROR_0("unexpected compressed pointer of type %s", obj->klass()->signature_name());
 206   }
 207 
 208   Klass* klass = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(obj));
 209   int index = _oop_recorder->find_index(klass);
 210   TRACE_jvmci_3("narrowKlass[%d of %d] = %s", index, _oop_recorder->metadata_count(), klass->name()->as_C_string());
 211   return Klass::encode_klass(klass);
 212 }
 213 #endif
 214 
 215 Location::Type CodeInstaller::get_oop_type(Handle value) {
 216   Handle lirKind = Value::lirKind(value);
 217   Handle platformKind = LIRKind::platformKind(lirKind);
 218   assert(LIRKind::referenceMask(lirKind) == 1, "unexpected referenceMask");
 219 
 220   if (platformKind == word_kind()) {
 221     return Location::oop;
 222   } else {
 223     return Location::narrowoop;
 224   }
 225 }
 226 
 227 ScopeValue* CodeInstaller::get_scope_value(Handle value, BasicType type, GrowableArray<ScopeValue*>* objects, ScopeValue* &second, TRAPS) {
 228   second = NULL;
 229   if (value.is_null()) {
 230     THROW_NULL(vmSymbols::java_lang_NullPointerException());
 231   } else if (value == Value::ILLEGAL()) {
 232     if (type != T_ILLEGAL) {
 233       JVMCI_ERROR_NULL("unexpected illegal value, expected %s", basictype_to_str(type));
 234     }
 235     return _illegal_value;
 236   } else if (value->is_a(RegisterValue::klass())) {
 237     Handle reg = RegisterValue::reg(value);
 238     jint number = code_Register::number(reg);
 239     VMReg hotspotRegister = get_hotspot_reg(number, CHECK_NULL);
 240     if (is_general_purpose_reg(hotspotRegister)) {
 241       Location::Type locationType;
 242       if (type == T_OBJECT) {
 243         locationType = get_oop_type(value);
 244       } else if (type == T_LONG) {
 245         locationType = Location::lng;
 246       } else if (type == T_INT || type == T_FLOAT || type == T_SHORT || type == T_CHAR || type == T_BYTE || type == T_BOOLEAN) {
 247         locationType = Location::int_in_long;
 248       } else {
 249         JVMCI_ERROR_NULL("unexpected type %s in cpu register", basictype_to_str(type));
 250       }
 251       ScopeValue* value = new LocationValue(Location::new_reg_loc(locationType, hotspotRegister));
 252       if (type == T_LONG) {
 253         second = value;
 254       }
 255       return value;
 256     } else {
 257       Location::Type locationType;
 258       if (type == T_FLOAT) {
 259         // this seems weird, but the same value is used in c1_LinearScan
 260         locationType = Location::normal;
 261       } else if (type == T_DOUBLE) {
 262         locationType = Location::dbl;
 263       } else {
 264         JVMCI_ERROR_NULL("unexpected type %s in floating point register", basictype_to_str(type));
 265       }
 266       ScopeValue* value = new LocationValue(Location::new_reg_loc(locationType, hotspotRegister));
 267       if (type == T_DOUBLE) {
 268         second = value;
 269       }
 270       return value;
 271     }
 272   } else if (value->is_a(StackSlot::klass())) {
 273     jint offset = StackSlot::offset(value);
 274     if (StackSlot::addFrameSize(value)) {
 275       offset += _total_frame_size;
 276     }
 277 
 278     Location::Type locationType;
 279     if (type == T_OBJECT) {
 280       locationType = get_oop_type(value);
 281     } else if (type == T_LONG) {
 282       locationType = Location::lng;
 283     } else if (type == T_DOUBLE) {
 284       locationType = Location::dbl;
 285     } else if (type == T_INT || type == T_FLOAT || type == T_SHORT || type == T_CHAR || type == T_BYTE || type == T_BOOLEAN) {
 286       locationType = Location::normal;
 287     } else {
 288       JVMCI_ERROR_NULL("unexpected type %s in stack slot", basictype_to_str(type));
 289     }
 290     ScopeValue* value = new LocationValue(Location::new_stk_loc(locationType, offset));
 291     if (type == T_DOUBLE || type == T_LONG) {
 292       second = value;
 293     }
 294     return value;
 295   } else if (value->is_a(JavaConstant::klass())) {
 296     if (value->is_a(PrimitiveConstant::klass())) {
 297       if (value->is_a(RawConstant::klass())) {
 298         jlong prim = PrimitiveConstant::primitive(value);
 299         return new ConstantLongValue(prim);
 300       } else {
 301         BasicType constantType = JVMCIRuntime::kindToBasicType(PrimitiveConstant::kind(value), CHECK_NULL);
 302         if (type != constantType) {
 303           JVMCI_ERROR_NULL("primitive constant type doesn't match, expected %s but got %s", basictype_to_str(type), basictype_to_str(constantType));
 304         }
 305         if (type == T_INT || type == T_FLOAT) {
 306           jint prim = (jint)PrimitiveConstant::primitive(value);
 307           switch (prim) {
 308             case -1: return _int_m1_scope_value;
 309             case  0: return _int_0_scope_value;
 310             case  1: return _int_1_scope_value;
 311             case  2: return _int_2_scope_value;
 312             default: return new ConstantIntValue(prim);
 313           }
 314         } else if (type == T_LONG || type == T_DOUBLE) {
 315           jlong prim = PrimitiveConstant::primitive(value);
 316           second = _int_1_scope_value;
 317           return new ConstantLongValue(prim);
 318         } else {
 319           JVMCI_ERROR_NULL("unexpected primitive constant type %s", basictype_to_str(type));
 320         }
 321       }
 322     } else if (value->is_a(NullConstant::klass()) || value->is_a(HotSpotCompressedNullConstant::klass())) {
 323       if (type == T_OBJECT) {
 324         return _oop_null_scope_value;
 325       } else {
 326         JVMCI_ERROR_NULL("unexpected null constant, expected %s", basictype_to_str(type));
 327       }
 328     } else if (value->is_a(HotSpotObjectConstantImpl::klass())) {
 329       if (type == T_OBJECT) {
 330         oop obj = HotSpotObjectConstantImpl::object(value);
 331         if (obj == NULL) {
 332           JVMCI_ERROR_NULL("null value must be in NullConstant");
 333         }
 334         return new ConstantOopWriteValue(JNIHandles::make_local(obj));
 335       } else {
 336         JVMCI_ERROR_NULL("unexpected object constant, expected %s", basictype_to_str(type));
 337       }
 338     }
 339   } else if (value->is_a(VirtualObject::klass())) {
 340     if (type == T_OBJECT) {
 341       int id = VirtualObject::id(value);
 342       if (0 <= id && id < objects->length()) {
 343         ScopeValue* object = objects->at(id);
 344         if (object != NULL) {
 345           return object;
 346         }
 347       }
 348       JVMCI_ERROR_NULL("unknown virtual object id %d", id);
 349     } else {
 350       JVMCI_ERROR_NULL("unexpected virtual object, expected %s", basictype_to_str(type));
 351     }
 352   }
 353 
 354   JVMCI_ERROR_NULL("unexpected value in scope: %s", value->klass()->signature_name())
 355 }
 356 
 357 void CodeInstaller::record_object_value(ObjectValue* sv, Handle value, GrowableArray<ScopeValue*>* objects, TRAPS) {
 358   Handle type = VirtualObject::type(value);
 359   int id = VirtualObject::id(value);
 360   oop javaMirror = HotSpotResolvedObjectTypeImpl::javaClass(type);
 361   Klass* klass = java_lang_Class::as_Klass(javaMirror);
 362   bool isLongArray = klass == Universe::longArrayKlassObj();
 363 
 364   objArrayHandle values = VirtualObject::values(value);
 365   objArrayHandle slotKinds = VirtualObject::slotKinds(value);
 366   for (jint i = 0; i < values->length(); i++) {
 367     ScopeValue* cur_second = NULL;
 368     Handle object = values->obj_at(i);
 369     BasicType type = JVMCIRuntime::kindToBasicType(slotKinds->obj_at(i), CHECK);
 370     ScopeValue* value = get_scope_value(object, type, objects, cur_second, CHECK);
 371 
 372     if (isLongArray && cur_second == NULL) {
 373       // we're trying to put ints into a long array... this isn't really valid, but it's used for some optimizations.
 374       // add an int 0 constant
 375       cur_second = _int_0_scope_value;
 376     }
 377 
 378     if (cur_second != NULL) {
 379       sv->field_values()->append(cur_second);
 380     }
 381     assert(value != NULL, "missing value");
 382     sv->field_values()->append(value);
 383   }
 384 }
 385 
 386 MonitorValue* CodeInstaller::get_monitor_value(Handle value, GrowableArray<ScopeValue*>* objects, TRAPS) {
 387   if (value.is_null()) {
 388     THROW_NULL(vmSymbols::java_lang_NullPointerException());
 389   }
 390   if (!value->is_a(StackLockValue::klass())) {
 391     JVMCI_ERROR_NULL("Monitors must be of type StackLockValue, got %s", value->klass()->signature_name());
 392   }
 393 
 394   ScopeValue* second = NULL;
 395   ScopeValue* owner_value = get_scope_value(StackLockValue::owner(value), T_OBJECT, objects, second, CHECK_NULL);
 396   assert(second == NULL, "monitor cannot occupy two stack slots");
 397 
 398   ScopeValue* lock_data_value = get_scope_value(StackLockValue::slot(value), T_LONG, objects, second, CHECK_NULL);
 399   assert(second == lock_data_value, "monitor is LONG value that occupies two stack slots");
 400   assert(lock_data_value->is_location(), "invalid monitor location");
 401   Location lock_data_loc = ((LocationValue*)lock_data_value)->location();
 402 
 403   bool eliminated = false;
 404   if (StackLockValue::eliminated(value)) {
 405     eliminated = true;
 406   }
 407 
 408   return new MonitorValue(owner_value, lock_data_loc, eliminated);
 409 }
 410 
 411 void CodeInstaller::initialize_dependencies(oop compiled_code, OopRecorder* recorder, TRAPS) {
 412   JavaThread* thread = JavaThread::current();
 413   CompilerThread* compilerThread = thread->is_Compiler_thread() ? thread->as_CompilerThread() : NULL;
 414   _oop_recorder = recorder;
 415   _dependencies = new Dependencies(&_arena, _oop_recorder, compilerThread != NULL ? compilerThread->log() : NULL);
 416   objArrayHandle assumptions = HotSpotCompiledCode::assumptions(compiled_code);
 417   if (!assumptions.is_null()) {
 418     int length = assumptions->length();
 419     for (int i = 0; i < length; ++i) {
 420       Handle assumption = assumptions->obj_at(i);
 421       if (!assumption.is_null()) {
 422         if (assumption->klass() == Assumptions_NoFinalizableSubclass::klass()) {
 423           assumption_NoFinalizableSubclass(assumption);
 424         } else if (assumption->klass() == Assumptions_ConcreteSubtype::klass()) {
 425           assumption_ConcreteSubtype(assumption);
 426         } else if (assumption->klass() == Assumptions_LeafType::klass()) {
 427           assumption_LeafType(assumption);
 428         } else if (assumption->klass() == Assumptions_ConcreteMethod::klass()) {
 429           assumption_ConcreteMethod(assumption);
 430         } else if (assumption->klass() == Assumptions_CallSiteTargetValue::klass()) {
 431           assumption_CallSiteTargetValue(assumption);
 432         } else {
 433           JVMCI_ERROR("unexpected Assumption subclass %s", assumption->klass()->signature_name());
 434         }
 435       }
 436     }
 437   }
 438   if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
 439     objArrayHandle methods = HotSpotCompiledCode::methods(compiled_code);
 440     if (!methods.is_null()) {
 441       int length = methods->length();
 442       for (int i = 0; i < length; ++i) {
 443         Handle method_handle = methods->obj_at(i);
 444         methodHandle method = getMethodFromHotSpotMethod(method_handle());
 445         _dependencies->assert_evol_method(method());
 446       }
 447     }
 448   }
 449 }
 450 
 451 RelocBuffer::~RelocBuffer() {
 452   if (_buffer != NULL) {
 453     FREE_C_HEAP_ARRAY(char, _buffer);
 454   }
 455 }
 456 
 457 address RelocBuffer::begin() const {
 458   if (_buffer != NULL) {
 459     return (address) _buffer;
 460   }
 461   return (address) _static_buffer;
 462 }
 463 
 464 void RelocBuffer::set_size(size_t bytes) {
 465   assert(bytes <= _size, "can't grow in size!");
 466   _size = bytes;
 467 }
 468 
 469 void RelocBuffer::ensure_size(size_t bytes) {
 470   assert(_buffer == NULL, "can only be used once");
 471   assert(_size == 0, "can only be used once");
 472   if (bytes >= RelocBuffer::stack_size) {
 473     _buffer = NEW_C_HEAP_ARRAY(char, bytes, mtInternal);
 474   }
 475   _size = bytes;
 476 }
 477 
 478 JVMCIEnv::CodeInstallResult CodeInstaller::gather_metadata(Handle target, Handle compiled_code, CodeMetadata& metadata, TRAPS) {
 479   CodeBuffer buffer("JVMCI Compiler CodeBuffer for Metadata");
 480   jobject compiled_code_obj = JNIHandles::make_local(compiled_code());
 481   initialize_dependencies(JNIHandles::resolve(compiled_code_obj), NULL, CHECK_OK);
 482 
 483   // Get instructions and constants CodeSections early because we need it.
 484   _instructions = buffer.insts();
 485   _constants = buffer.consts();
 486 
 487   initialize_fields(target(), JNIHandles::resolve(compiled_code_obj), CHECK_OK);
 488   JVMCIEnv::CodeInstallResult result = initialize_buffer(buffer, CHECK_OK);
 489   if (result != JVMCIEnv::ok) {
 490     return result;
 491   }
 492 
 493   _debug_recorder->pcs_size(); // ehm, create the sentinel record
 494 
 495   assert(_debug_recorder->pcs_length() >= 2, "must be at least 2");
 496 
 497   metadata.set_pc_desc(_debug_recorder->pcs(), _debug_recorder->pcs_length());
 498   metadata.set_scopes(_debug_recorder->stream()->buffer(), _debug_recorder->data_size());
 499   metadata.set_exception_table(&_exception_handler_table);
 500 
 501   RelocBuffer* reloc_buffer = metadata.get_reloc_buffer();
 502 
 503   reloc_buffer->ensure_size(buffer.total_relocation_size());
 504   size_t size = (size_t) buffer.copy_relocations_to(reloc_buffer->begin(), (CodeBuffer::csize_t) reloc_buffer->size(), true);
 505   reloc_buffer->set_size(size);
 506   return JVMCIEnv::ok;
 507 }
 508 
 509 // constructor used to create a method
 510 JVMCIEnv::CodeInstallResult CodeInstaller::install(JVMCICompiler* compiler, Handle target, Handle compiled_code, CodeBlob*& cb, Handle installed_code, Handle speculation_log, TRAPS) {
 511   CodeBuffer buffer("JVMCI Compiler CodeBuffer");
 512   jobject compiled_code_obj = JNIHandles::make_local(compiled_code());
 513   OopRecorder* recorder = new OopRecorder(&_arena, true);
 514   initialize_dependencies(JNIHandles::resolve(compiled_code_obj), recorder, CHECK_OK);
 515 
 516   // Get instructions and constants CodeSections early because we need it.
 517   _instructions = buffer.insts();
 518   _constants = buffer.consts();
 519 
 520   initialize_fields(target(), JNIHandles::resolve(compiled_code_obj), CHECK_OK);
 521   JVMCIEnv::CodeInstallResult result = initialize_buffer(buffer, CHECK_OK);
 522   if (result != JVMCIEnv::ok) {
 523     return result;
 524   }
 525 
 526   int stack_slots = _total_frame_size / HeapWordSize; // conversion to words
 527 
 528   if (!compiled_code->is_a(HotSpotCompiledNmethod::klass())) {
 529     oop stubName = HotSpotCompiledCode::name(compiled_code_obj);
 530     char* name = strdup(java_lang_String::as_utf8_string(stubName));
 531     cb = RuntimeStub::new_runtime_stub(name,
 532                                        &buffer,
 533                                        CodeOffsets::frame_never_safe,
 534                                        stack_slots,
 535                                        _debug_recorder->_oopmaps,
 536                                        false);
 537     result = JVMCIEnv::ok;
 538   } else {
 539     nmethod* nm = NULL;
 540     methodHandle method = getMethodFromHotSpotMethod(HotSpotCompiledNmethod::method(compiled_code));
 541     jint entry_bci = HotSpotCompiledNmethod::entryBCI(compiled_code);
 542     jint id = HotSpotCompiledNmethod::id(compiled_code);
 543     bool has_unsafe_access = HotSpotCompiledNmethod::hasUnsafeAccess(compiled_code) == JNI_TRUE;
 544     JVMCIEnv* env = (JVMCIEnv*) (address) HotSpotCompiledNmethod::jvmciEnv(compiled_code);
 545     if (id == -1) {
 546       // Make sure a valid compile_id is associated with every compile
 547       id = CompileBroker::assign_compile_id_unlocked(Thread::current(), method, entry_bci);
 548     }
 549     result = JVMCIEnv::register_method(method, nm, entry_bci, &_offsets, _orig_pc_offset, &buffer,
 550                                        stack_slots, _debug_recorder->_oopmaps, &_exception_handler_table,
 551                                        compiler, _debug_recorder, _dependencies, env, id,
 552                                        has_unsafe_access, _has_wide_vector, installed_code, compiled_code, speculation_log);
 553     cb = nm;
 554   }
 555 
 556   if (cb != NULL) {
 557     // Make sure the pre-calculated constants section size was correct.
 558     guarantee((cb->code_begin() - cb->content_begin()) >= _constants_size, "%d < %d", (int)(cb->code_begin() - cb->content_begin()), _constants_size);
 559   }
 560   return result;
 561 }
 562 
 563 void CodeInstaller::initialize_fields(oop target, oop compiled_code, TRAPS) {
 564   if (compiled_code->is_a(HotSpotCompiledNmethod::klass())) {
 565     Handle hotspotJavaMethod = HotSpotCompiledNmethod::method(compiled_code);
 566     methodHandle method = getMethodFromHotSpotMethod(hotspotJavaMethod());
 567     _parameter_count = method->size_of_parameters();
 568     TRACE_jvmci_2("installing code for %s", method->name_and_sig_as_C_string());
 569   } else {
 570     // Must be a HotSpotCompiledRuntimeStub.
 571     // Only used in OopMap constructor for non-product builds
 572     _parameter_count = 0;
 573   }
 574   _sites_handle = JNIHandles::make_local(HotSpotCompiledCode::sites(compiled_code));
 575 
 576   _code_handle = JNIHandles::make_local(HotSpotCompiledCode::targetCode(compiled_code));
 577   _code_size = HotSpotCompiledCode::targetCodeSize(compiled_code);
 578   _total_frame_size = HotSpotCompiledCode::totalFrameSize(compiled_code);
 579 
 580   oop deoptRescueSlot = HotSpotCompiledCode::deoptRescueSlot(compiled_code);
 581   if (deoptRescueSlot == NULL) {
 582     _orig_pc_offset = -1;
 583   } else {
 584     _orig_pc_offset = StackSlot::offset(deoptRescueSlot);
 585     if (StackSlot::addFrameSize(deoptRescueSlot)) {
 586       _orig_pc_offset += _total_frame_size;
 587     }
 588     if (_orig_pc_offset < 0) {
 589       JVMCI_ERROR("invalid deopt rescue slot: %d", _orig_pc_offset);
 590     }
 591   }
 592 
 593   // Pre-calculate the constants section size.  This is required for PC-relative addressing.
 594   _data_section_handle = JNIHandles::make_local(HotSpotCompiledCode::dataSection(compiled_code));
 595   if ((_constants->alignment() % HotSpotCompiledCode::dataSectionAlignment(compiled_code)) != 0) {
 596     JVMCI_ERROR("invalid data section alignment: %d", HotSpotCompiledCode::dataSectionAlignment(compiled_code));
 597   }
 598   _constants_size = data_section()->length();
 599 
 600   _data_section_patches_handle = JNIHandles::make_local(HotSpotCompiledCode::dataSectionPatches(compiled_code));
 601 
 602 #ifndef PRODUCT
 603   _comments_handle = JNIHandles::make_local(HotSpotCompiledCode::comments(compiled_code));
 604 #endif
 605 
 606   _next_call_type = INVOKE_INVALID;
 607 
 608   _has_wide_vector = false;
 609 
 610   oop arch = TargetDescription::arch(target);
 611   _word_kind_handle = JNIHandles::make_local(Architecture::wordKind(arch));
 612 }
 613 
 614 int CodeInstaller::estimate_stubs_size(TRAPS) {
 615   // Estimate the number of static call stubs that might be emitted.
 616   int static_call_stubs = 0;
 617   objArrayOop sites = this->sites();
 618   for (int i = 0; i < sites->length(); i++) {
 619     oop site = sites->obj_at(i);
 620     if (site != NULL && site->is_a(site_Mark::klass())) {
 621       oop id_obj = site_Mark::id(site);
 622       if (id_obj != NULL) {
 623         if (!java_lang_boxing_object::is_instance(id_obj, T_INT)) {
 624           JVMCI_ERROR_0("expected Integer id, got %s", id_obj->klass()->signature_name());
 625         }
 626         jint id = id_obj->int_field(java_lang_boxing_object::value_offset_in_bytes(T_INT));
 627         if (id == INVOKESTATIC || id == INVOKESPECIAL) {
 628           static_call_stubs++;
 629         }
 630       }
 631     }
 632   }
 633   return static_call_stubs * CompiledStaticCall::to_interp_stub_size();
 634 }
 635 
 636 // perform data and call relocation on the CodeBuffer
 637 JVMCIEnv::CodeInstallResult CodeInstaller::initialize_buffer(CodeBuffer& buffer, TRAPS) {
 638   HandleMark hm;
 639   objArrayHandle sites = this->sites();
 640   int locs_buffer_size = sites->length() * (relocInfo::length_limit + sizeof(relocInfo));
 641 
 642   // Allocate enough space in the stub section for the static call
 643   // stubs.  Stubs have extra relocs but they are managed by the stub
 644   // section itself so they don't need to be accounted for in the
 645   // locs_buffer above.
 646   int stubs_size = estimate_stubs_size(CHECK_OK);
 647   int total_size = round_to(_code_size, buffer.insts()->alignment()) + round_to(_constants_size, buffer.consts()->alignment()) + round_to(stubs_size, buffer.stubs()->alignment());
 648 
 649   if (total_size > JVMCINMethodSizeLimit) {
 650     return JVMCIEnv::code_too_large;
 651   }
 652 
 653   buffer.initialize(total_size, locs_buffer_size);
 654   if (buffer.blob() == NULL) {
 655     return JVMCIEnv::cache_full;
 656   }
 657   buffer.initialize_stubs_size(stubs_size);
 658   buffer.initialize_consts_size(_constants_size);
 659 
 660   _debug_recorder = new DebugInformationRecorder(_oop_recorder);
 661   _debug_recorder->set_oopmaps(new OopMapSet());
 662 
 663   buffer.initialize_oop_recorder(_oop_recorder);
 664 
 665   // copy the constant data into the newly created CodeBuffer
 666   address end_data = _constants->start() + _constants_size;
 667   memcpy(_constants->start(), data_section()->base(T_BYTE), _constants_size);
 668   _constants->set_end(end_data);
 669 
 670   // copy the code into the newly created CodeBuffer
 671   address end_pc = _instructions->start() + _code_size;
 672   guarantee(_instructions->allocates2(end_pc), "initialize should have reserved enough space for all the code");
 673   memcpy(_instructions->start(), code()->base(T_BYTE), _code_size);
 674   _instructions->set_end(end_pc);
 675 
 676   for (int i = 0; i < data_section_patches()->length(); i++) {
 677     Handle patch = data_section_patches()->obj_at(i);
 678     if (patch.is_null()) {
 679       THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
 680     }
 681     Handle reference = site_DataPatch::reference(patch);
 682     if (reference.is_null()) {
 683       THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
 684     }
 685     if (!reference->is_a(site_ConstantReference::klass())) {
 686       JVMCI_ERROR_OK("invalid patch in data section: %s", reference->klass()->signature_name());
 687     }
 688     Handle constant = site_ConstantReference::constant(reference);
 689     if (constant.is_null()) {
 690       THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
 691     }
 692     address dest = _constants->start() + site_Site::pcOffset(patch);
 693     if (constant->is_a(HotSpotMetaspaceConstantImpl::klass())) {
 694       if (HotSpotMetaspaceConstantImpl::compressed(constant)) {
 695 #ifdef _LP64
 696         *((narrowKlass*) dest) = record_narrow_metadata_reference(constant, CHECK_OK);
 697 #else
 698         JVMCI_ERROR_OK("unexpected compressed Klass* in 32-bit mode");
 699 #endif
 700       } else {
 701         *((Metadata**) dest) = record_metadata_reference(constant, CHECK_OK);
 702       }
 703     } else if (constant->is_a(HotSpotObjectConstantImpl::klass())) {
 704       Handle obj = HotSpotObjectConstantImpl::object(constant);
 705       jobject value = JNIHandles::make_local(obj());
 706       int oop_index = _oop_recorder->find_index(value);
 707 
 708       if (HotSpotObjectConstantImpl::compressed(constant)) {
 709 #ifdef _LP64
 710         _constants->relocate(dest, oop_Relocation::spec(oop_index), relocInfo::narrow_oop_in_const);
 711 #else
 712         JVMCI_ERROR_OK("unexpected compressed oop in 32-bit mode");
 713 #endif
 714       } else {
 715         _constants->relocate(dest, oop_Relocation::spec(oop_index));
 716       }
 717     } else {
 718       JVMCI_ERROR_OK("invalid constant in data section: %s", constant->klass()->signature_name());
 719     }
 720   }
 721   jint last_pc_offset = -1;
 722   for (int i = 0; i < sites->length(); i++) {
 723     Handle site = sites->obj_at(i);
 724     if (site.is_null()) {
 725       THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
 726     }
 727 
 728     jint pc_offset = site_Site::pcOffset(site);
 729 
 730     if (site->is_a(site_Call::klass())) {
 731       TRACE_jvmci_4("call at %i", pc_offset);
 732       site_Call(buffer, pc_offset, site, CHECK_OK);
 733     } else if (site->is_a(site_Infopoint::klass())) {
 734       // three reasons for infopoints denote actual safepoints
 735       oop reason = site_Infopoint::reason(site);
 736       if (site_InfopointReason::SAFEPOINT() == reason || site_InfopointReason::CALL() == reason || site_InfopointReason::IMPLICIT_EXCEPTION() == reason) {
 737         TRACE_jvmci_4("safepoint at %i", pc_offset);
 738         site_Safepoint(buffer, pc_offset, site, CHECK_OK);
 739         if (_orig_pc_offset < 0) {
 740           JVMCI_ERROR_OK("method contains safepoint, but has no deopt rescue slot");
 741         }
 742       } else {
 743         TRACE_jvmci_4("infopoint at %i", pc_offset);
 744         site_Infopoint(buffer, pc_offset, site, CHECK_OK);
 745       }
 746     } else if (site->is_a(site_DataPatch::klass())) {
 747       TRACE_jvmci_4("datapatch at %i", pc_offset);
 748       site_DataPatch(buffer, pc_offset, site, CHECK_OK);
 749     } else if (site->is_a(site_Mark::klass())) {
 750       TRACE_jvmci_4("mark at %i", pc_offset);
 751       site_Mark(buffer, pc_offset, site, CHECK_OK);
 752     } else if (site->is_a(site_ExceptionHandler::klass())) {
 753       TRACE_jvmci_4("exceptionhandler at %i", pc_offset);
 754       site_ExceptionHandler(pc_offset, site);
 755     } else {
 756       JVMCI_ERROR_OK("unexpected site subclass: %s", site->klass()->signature_name());
 757     }
 758     last_pc_offset = pc_offset;
 759 
 760     if (CodeInstallSafepointChecks && SafepointSynchronize::do_call_back()) {
 761       // this is a hacky way to force a safepoint check but nothing else was jumping out at me.
 762       ThreadToNativeFromVM ttnfv(JavaThread::current());
 763     }
 764   }
 765 
 766 #ifndef PRODUCT
 767   if (comments() != NULL) {
 768     for (int i = 0; i < comments()->length(); i++) {
 769       oop comment = comments()->obj_at(i);
 770       assert(comment->is_a(HotSpotCompiledCode_Comment::klass()), "cce");
 771       jint offset = HotSpotCompiledCode_Comment::pcOffset(comment);
 772       char* text = java_lang_String::as_utf8_string(HotSpotCompiledCode_Comment::text(comment));
 773       buffer.block_comment(offset, text);
 774     }
 775   }
 776 #endif
 777   return JVMCIEnv::ok;
 778 }
 779 
 780 void CodeInstaller::assumption_NoFinalizableSubclass(Handle assumption) {
 781   Handle receiverType_handle = Assumptions_NoFinalizableSubclass::receiverType(assumption());
 782   Klass* receiverType = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(receiverType_handle));
 783   _dependencies->assert_has_no_finalizable_subclasses(receiverType);
 784 }
 785 
 786 void CodeInstaller::assumption_ConcreteSubtype(Handle assumption) {
 787   Handle context_handle = Assumptions_ConcreteSubtype::context(assumption());
 788   Handle subtype_handle = Assumptions_ConcreteSubtype::subtype(assumption());
 789   Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));
 790   Klass* subtype = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(subtype_handle));
 791 
 792   assert(context->is_abstract(), "");
 793   _dependencies->assert_abstract_with_unique_concrete_subtype(context, subtype);
 794 }
 795 
 796 void CodeInstaller::assumption_LeafType(Handle assumption) {
 797   Handle context_handle = Assumptions_LeafType::context(assumption());
 798   Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));
 799 
 800   _dependencies->assert_leaf_type(context);
 801 }
 802 
 803 void CodeInstaller::assumption_ConcreteMethod(Handle assumption) {
 804   Handle impl_handle = Assumptions_ConcreteMethod::impl(assumption());
 805   Handle context_handle = Assumptions_ConcreteMethod::context(assumption());
 806 
 807   methodHandle impl = getMethodFromHotSpotMethod(impl_handle());
 808   Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));
 809 
 810   _dependencies->assert_unique_concrete_method(context, impl());
 811 }
 812 
 813 void CodeInstaller::assumption_CallSiteTargetValue(Handle assumption) {
 814   Handle callSite = Assumptions_CallSiteTargetValue::callSite(assumption());
 815   Handle methodHandle = Assumptions_CallSiteTargetValue::methodHandle(assumption());
 816 
 817   _dependencies->assert_call_site_target_value(callSite(), methodHandle());
 818 }
 819 
 820 void CodeInstaller::site_ExceptionHandler(jint pc_offset, Handle exc) {
 821   jint handler_offset = site_ExceptionHandler::handlerPos(exc);
 822 
 823   // Subtable header
 824   _exception_handler_table.add_entry(HandlerTableEntry(1, pc_offset, 0));
 825 
 826   // Subtable entry
 827   _exception_handler_table.add_entry(HandlerTableEntry(-1, handler_offset, 0));
 828 }
 829 
 830 // If deoptimization happens, the interpreter should reexecute these bytecodes.
 831 // This function mainly helps the compilers to set up the reexecute bit.
 832 static bool bytecode_should_reexecute(Bytecodes::Code code) {
 833   switch (code) {
 834     case Bytecodes::_invokedynamic:
 835     case Bytecodes::_invokevirtual:
 836     case Bytecodes::_invokeinterface:
 837     case Bytecodes::_invokespecial:
 838     case Bytecodes::_invokestatic:
 839       return false;
 840     default:
 841       return true;
 842     }
 843   return true;
 844 }
 845 
 846 GrowableArray<ScopeValue*>* CodeInstaller::record_virtual_objects(Handle debug_info, TRAPS) {
 847   objArrayHandle virtualObjects = DebugInfo::virtualObjectMapping(debug_info);
 848   if (virtualObjects.is_null()) {
 849     return NULL;
 850   }
 851   GrowableArray<ScopeValue*>* objects = new GrowableArray<ScopeValue*>(virtualObjects->length(), virtualObjects->length(), NULL);
 852   // Create the unique ObjectValues
 853   for (int i = 0; i < virtualObjects->length(); i++) {
 854     Handle value = virtualObjects->obj_at(i);
 855     int id = VirtualObject::id(value);
 856     Handle type = VirtualObject::type(value);
 857     oop javaMirror = HotSpotResolvedObjectTypeImpl::javaClass(type);
 858     ObjectValue* sv = new ObjectValue(id, new ConstantOopWriteValue(JNIHandles::make_local(Thread::current(), javaMirror)));
 859     if (id < 0 || id >= objects->length()) {
 860       JVMCI_ERROR_NULL("virtual object id %d out of bounds", id);
 861     }
 862     if (objects->at(id) != NULL) {
 863       JVMCI_ERROR_NULL("duplicate virtual object id %d", id);
 864     }
 865     objects->at_put(id, sv);
 866   }
 867   // All the values which could be referenced by the VirtualObjects
 868   // exist, so now describe all the VirtualObjects themselves.
 869   for (int i = 0; i < virtualObjects->length(); i++) {
 870     Handle value = virtualObjects->obj_at(i);
 871     int id = VirtualObject::id(value);
 872     record_object_value(objects->at(id)->as_ObjectValue(), value, objects, CHECK_NULL);
 873   }
 874   _debug_recorder->dump_object_pool(objects);
 875   return objects;
 876 }
 877 
 878 void CodeInstaller::record_scope(jint pc_offset, Handle debug_info, ScopeMode scope_mode, TRAPS) {
 879   Handle position = DebugInfo::bytecodePosition(debug_info);
 880   if (position.is_null()) {
 881     // Stubs do not record scope info, just oop maps
 882     return;
 883   }
 884 
 885   GrowableArray<ScopeValue*>* objectMapping;
 886   if (scope_mode == CodeInstaller::FullFrame) {
 887     objectMapping = record_virtual_objects(debug_info, CHECK);
 888   } else {
 889     objectMapping = NULL;
 890   }
 891   record_scope(pc_offset, position, scope_mode, objectMapping, CHECK);
 892 }
 893 
 894 void CodeInstaller::record_scope(jint pc_offset, Handle position, ScopeMode scope_mode, GrowableArray<ScopeValue*>* objects, TRAPS) {
 895   Handle frame;
 896   if (scope_mode == CodeInstaller::FullFrame) {
 897     if (!position->is_a(BytecodeFrame::klass())) {
 898       JVMCI_ERROR("Full frame expected for debug info at %i", pc_offset);
 899     }
 900     frame = position;
 901   }
 902   Handle caller_frame = BytecodePosition::caller(position);
 903   if (caller_frame.not_null()) {
 904     record_scope(pc_offset, caller_frame, scope_mode, objects, CHECK);
 905   }
 906 
 907   Handle hotspot_method = BytecodePosition::method(position);
 908   Method* method = getMethodFromHotSpotMethod(hotspot_method());
 909   jint bci = BytecodePosition::bci(position);
 910   if (bci == BytecodeFrame::BEFORE_BCI()) {
 911     bci = SynchronizationEntryBCI;
 912   }
 913 
 914   TRACE_jvmci_2("Recording scope pc_offset=%d bci=%d method=%s", pc_offset, bci, method->name_and_sig_as_C_string());
 915 
 916   bool reexecute = false;
 917   if (frame.not_null()) {
 918     if (bci == SynchronizationEntryBCI){
 919        reexecute = false;
 920     } else {
 921       Bytecodes::Code code = Bytecodes::java_code_at(method, method->bcp_from(bci));
 922       reexecute = bytecode_should_reexecute(code);
 923       if (frame.not_null()) {
 924         reexecute = (BytecodeFrame::duringCall(frame) == JNI_FALSE);
 925       }
 926     }
 927   }
 928 
 929   DebugToken* locals_token = NULL;
 930   DebugToken* expressions_token = NULL;
 931   DebugToken* monitors_token = NULL;
 932   bool throw_exception = false;
 933 
 934   if (frame.not_null()) {
 935     jint local_count = BytecodeFrame::numLocals(frame);
 936     jint expression_count = BytecodeFrame::numStack(frame);
 937     jint monitor_count = BytecodeFrame::numLocks(frame);
 938     objArrayHandle values = BytecodeFrame::values(frame);
 939     objArrayHandle slotKinds = BytecodeFrame::slotKinds(frame);
 940 
 941     if (values.is_null() || slotKinds.is_null()) {
 942       THROW(vmSymbols::java_lang_NullPointerException());
 943     }
 944     if (local_count + expression_count + monitor_count != values->length()) {
 945       JVMCI_ERROR("unexpected values length %d in scope (%d locals, %d expressions, %d monitors)", values->length(), local_count, expression_count, monitor_count);
 946     }
 947     if (local_count + expression_count != slotKinds->length()) {
 948       JVMCI_ERROR("unexpected slotKinds length %d in scope (%d locals, %d expressions)", slotKinds->length(), local_count, expression_count);
 949     }
 950 
 951     GrowableArray<ScopeValue*>* locals = local_count > 0 ? new GrowableArray<ScopeValue*> (local_count) : NULL;
 952     GrowableArray<ScopeValue*>* expressions = expression_count > 0 ? new GrowableArray<ScopeValue*> (expression_count) : NULL;
 953     GrowableArray<MonitorValue*>* monitors = monitor_count > 0 ? new GrowableArray<MonitorValue*> (monitor_count) : NULL;
 954 
 955     TRACE_jvmci_2("Scope at bci %d with %d values", bci, values->length());
 956     TRACE_jvmci_2("%d locals %d expressions, %d monitors", local_count, expression_count, monitor_count);
 957 
 958     for (jint i = 0; i < values->length(); i++) {
 959       ScopeValue* second = NULL;
 960       Handle value = values->obj_at(i);
 961       if (i < local_count) {
 962         BasicType type = JVMCIRuntime::kindToBasicType(slotKinds->obj_at(i), CHECK);
 963         ScopeValue* first = get_scope_value(value, type, objects, second, CHECK);
 964         if (second != NULL) {
 965           locals->append(second);
 966         }
 967         locals->append(first);
 968       } else if (i < local_count + expression_count) {
 969         BasicType type = JVMCIRuntime::kindToBasicType(slotKinds->obj_at(i), CHECK);
 970         ScopeValue* first = get_scope_value(value, type, objects, second, CHECK);
 971         if (second != NULL) {
 972           expressions->append(second);
 973         }
 974         expressions->append(first);
 975       } else {
 976         MonitorValue *monitor = get_monitor_value(value, objects, CHECK);
 977         monitors->append(monitor);
 978       }
 979       if (second != NULL) {
 980         i++;
 981         if (i >= values->length() || values->obj_at(i) != Value::ILLEGAL()) {
 982           JVMCI_ERROR("double-slot value not followed by Value.ILLEGAL");
 983         }
 984       }
 985     }
 986 
 987     locals_token = _debug_recorder->create_scope_values(locals);
 988     expressions_token = _debug_recorder->create_scope_values(expressions);
 989     monitors_token = _debug_recorder->create_monitor_values(monitors);
 990 
 991     throw_exception = BytecodeFrame::rethrowException(frame) == JNI_TRUE;
 992   }
 993 
 994   _debug_recorder->describe_scope(pc_offset, method, NULL, bci, reexecute, throw_exception, false, false,
 995                                   locals_token, expressions_token, monitors_token);
 996 }
 997 
 998 void CodeInstaller::site_Safepoint(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
 999   Handle debug_info = site_Infopoint::debugInfo(site);
1000   if (debug_info.is_null()) {
1001     JVMCI_ERROR("debug info expected at safepoint at %i", pc_offset);
1002   }
1003 
1004   // address instruction = _instructions->start() + pc_offset;
1005   // jint next_pc_offset = Assembler::locate_next_instruction(instruction) - _instructions->start();
1006   OopMap *map = create_oop_map(debug_info, CHECK);
1007   _debug_recorder->add_safepoint(pc_offset, map);
1008   record_scope(pc_offset, debug_info, CodeInstaller::FullFrame, CHECK);
1009   _debug_recorder->end_safepoint(pc_offset);
1010 }
1011 
1012 void CodeInstaller::site_Infopoint(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
1013   Handle debug_info = site_Infopoint::debugInfo(site);
1014   if (debug_info.is_null()) {
1015     JVMCI_ERROR("debug info expected at infopoint at %i", pc_offset);
1016   }
1017 
1018   // We'd like to check that pc_offset is greater than the
1019   // last pc recorded with _debug_recorder (raising an exception if not)
1020   // but DebugInformationRecorder doesn't have sufficient public API.
1021 
1022   _debug_recorder->add_non_safepoint(pc_offset);
1023   record_scope(pc_offset, debug_info, CodeInstaller::BytecodePosition, CHECK);
1024   _debug_recorder->end_non_safepoint(pc_offset);
1025 }
1026 
1027 void CodeInstaller::site_Call(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
1028   Handle target = site_Call::target(site);
1029   InstanceKlass* target_klass = InstanceKlass::cast(target->klass());
1030 
1031   Handle hotspot_method; // JavaMethod
1032   Handle foreign_call;
1033 
1034   if (target_klass->is_subclass_of(SystemDictionary::HotSpotForeignCallTarget_klass())) {
1035     foreign_call = target;
1036   } else {
1037     hotspot_method = target;
1038   }
1039 
1040   Handle debug_info = site_Call::debugInfo(site);
1041 
1042   assert(hotspot_method.not_null() ^ foreign_call.not_null(), "Call site needs exactly one type");
1043 
1044   NativeInstruction* inst = nativeInstruction_at(_instructions->start() + pc_offset);
1045   jint next_pc_offset = CodeInstaller::pd_next_offset(inst, pc_offset, hotspot_method, CHECK);
1046 
1047   if (debug_info.not_null()) {
1048     OopMap *map = create_oop_map(debug_info, CHECK);
1049     _debug_recorder->add_safepoint(next_pc_offset, map);
1050     record_scope(next_pc_offset, debug_info, CodeInstaller::FullFrame, CHECK);
1051   }
1052 
1053   if (foreign_call.not_null()) {
1054     jlong foreign_call_destination = HotSpotForeignCallTarget::address(foreign_call);
1055     CodeInstaller::pd_relocate_ForeignCall(inst, foreign_call_destination, CHECK);
1056   } else { // method != NULL
1057     if (debug_info.is_null()) {
1058       JVMCI_ERROR("debug info expected at call at %i", pc_offset);
1059     }
1060 
1061     TRACE_jvmci_3("method call");
1062     CodeInstaller::pd_relocate_JavaMethod(hotspot_method, pc_offset, CHECK);
1063     if (_next_call_type == INVOKESTATIC || _next_call_type == INVOKESPECIAL) {
1064       // Need a static call stub for transitions from compiled to interpreted.
1065       CompiledStaticCall::emit_to_interp_stub(buffer, _instructions->start() + pc_offset);
1066     }
1067   }
1068 
1069   _next_call_type = INVOKE_INVALID;
1070 
1071   if (debug_info.not_null()) {
1072     _debug_recorder->end_safepoint(next_pc_offset);
1073   }
1074 }
1075 
1076 void CodeInstaller::site_DataPatch(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
1077   Handle reference = site_DataPatch::reference(site);
1078   if (reference.is_null()) {
1079     THROW(vmSymbols::java_lang_NullPointerException());
1080   } else if (reference->is_a(site_ConstantReference::klass())) {
1081     Handle constant = site_ConstantReference::constant(reference);
1082     if (constant.is_null()) {
1083       THROW(vmSymbols::java_lang_NullPointerException());
1084     } else if (constant->is_a(HotSpotObjectConstantImpl::klass())) {
1085       pd_patch_OopConstant(pc_offset, constant, CHECK);
1086     } else if (constant->is_a(HotSpotMetaspaceConstantImpl::klass())) {
1087       pd_patch_MetaspaceConstant(pc_offset, constant, CHECK);
1088     } else {
1089       JVMCI_ERROR("unknown constant type in data patch: %s", constant->klass()->signature_name());
1090     }
1091   } else if (reference->is_a(site_DataSectionReference::klass())) {
1092     int data_offset = site_DataSectionReference::offset(reference);
1093     if (0 <= data_offset && data_offset < _constants_size) {
1094       pd_patch_DataSectionReference(pc_offset, data_offset);
1095     } else {
1096       JVMCI_ERROR("data offset 0x%X points outside data section (size 0x%X)", data_offset, _constants_size);
1097     }
1098   } else {
1099     JVMCI_ERROR("unknown data patch type: %s", reference->klass()->signature_name());
1100   }
1101 }
1102 
1103 void CodeInstaller::site_Mark(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
1104   Handle id_obj = site_Mark::id(site);
1105 
1106   if (id_obj.not_null()) {
1107     if (!java_lang_boxing_object::is_instance(id_obj(), T_INT)) {
1108       JVMCI_ERROR("expected Integer id, got %s", id_obj->klass()->signature_name());
1109     }
1110     jint id = id_obj->int_field(java_lang_boxing_object::value_offset_in_bytes(T_INT));
1111 
1112     address pc = _instructions->start() + pc_offset;
1113 
1114     switch (id) {
1115       case UNVERIFIED_ENTRY:
1116         _offsets.set_value(CodeOffsets::Entry, pc_offset);
1117         break;
1118       case VERIFIED_ENTRY:
1119         _offsets.set_value(CodeOffsets::Verified_Entry, pc_offset);
1120         break;
1121       case OSR_ENTRY:
1122         _offsets.set_value(CodeOffsets::OSR_Entry, pc_offset);
1123         break;
1124       case EXCEPTION_HANDLER_ENTRY:
1125         _offsets.set_value(CodeOffsets::Exceptions, pc_offset);
1126         break;
1127       case DEOPT_HANDLER_ENTRY:
1128         _offsets.set_value(CodeOffsets::Deopt, pc_offset);
1129         break;
1130       case INVOKEVIRTUAL:
1131       case INVOKEINTERFACE:
1132       case INLINE_INVOKE:
1133       case INVOKESTATIC:
1134       case INVOKESPECIAL:
1135         _next_call_type = (MarkId) id;
1136         _invoke_mark_pc = pc;
1137         break;
1138       case POLL_NEAR:
1139       case POLL_FAR:
1140       case POLL_RETURN_NEAR:
1141       case POLL_RETURN_FAR:
1142         pd_relocate_poll(pc, id, CHECK);
1143         break;
1144       case CARD_TABLE_SHIFT:
1145       case CARD_TABLE_ADDRESS:
1146       case HEAP_TOP_ADDRESS:
1147       case HEAP_END_ADDRESS:
1148       case NARROW_KLASS_BASE_ADDRESS:
1149       case CRC_TABLE_ADDRESS:
1150         break;
1151       default:
1152         JVMCI_ERROR("invalid mark id: %d", id);
1153         break;
1154     }
1155   }
1156 }
1157