1 /*
   2  * Copyright (c) 2011, 2015, 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   process_exception_handlers();
 493 
 494   _debug_recorder->pcs_size(); // ehm, create the sentinel record
 495 
 496   assert(_debug_recorder->pcs_length() >= 2, "must be at least 2");
 497 
 498   metadata.set_pc_desc(_debug_recorder->pcs(), _debug_recorder->pcs_length());
 499   metadata.set_scopes(_debug_recorder->stream()->buffer(), _debug_recorder->data_size());
 500   metadata.set_exception_table(&_exception_handler_table);
 501 
 502   RelocBuffer* reloc_buffer = metadata.get_reloc_buffer();
 503 
 504   reloc_buffer->ensure_size(buffer.total_relocation_size());
 505   size_t size = (size_t) buffer.copy_relocations_to(reloc_buffer->begin(), (CodeBuffer::csize_t) reloc_buffer->size(), true);
 506   reloc_buffer->set_size(size);
 507   return JVMCIEnv::ok;
 508 }
 509 
 510 // constructor used to create a method
 511 JVMCIEnv::CodeInstallResult CodeInstaller::install(JVMCICompiler* compiler, Handle target, Handle compiled_code, CodeBlob*& cb, Handle installed_code, Handle speculation_log, TRAPS) {
 512   CodeBuffer buffer("JVMCI Compiler CodeBuffer");
 513   jobject compiled_code_obj = JNIHandles::make_local(compiled_code());
 514   OopRecorder* recorder = new OopRecorder(&_arena, true);
 515   initialize_dependencies(JNIHandles::resolve(compiled_code_obj), recorder, CHECK_OK);
 516 
 517   // Get instructions and constants CodeSections early because we need it.
 518   _instructions = buffer.insts();
 519   _constants = buffer.consts();
 520 
 521   initialize_fields(target(), JNIHandles::resolve(compiled_code_obj), CHECK_OK);
 522   JVMCIEnv::CodeInstallResult result = initialize_buffer(buffer, CHECK_OK);
 523   if (result != JVMCIEnv::ok) {
 524     return result;
 525   }
 526   process_exception_handlers();
 527 
 528   int stack_slots = _total_frame_size / HeapWordSize; // conversion to words
 529 
 530   if (!compiled_code->is_a(HotSpotCompiledNmethod::klass())) {
 531     oop stubName = HotSpotCompiledCode::name(compiled_code_obj);
 532     char* name = strdup(java_lang_String::as_utf8_string(stubName));
 533     cb = RuntimeStub::new_runtime_stub(name,
 534                                        &buffer,
 535                                        CodeOffsets::frame_never_safe,
 536                                        stack_slots,
 537                                        _debug_recorder->_oopmaps,
 538                                        false);
 539     result = JVMCIEnv::ok;
 540   } else {
 541     nmethod* nm = NULL;
 542     methodHandle method = getMethodFromHotSpotMethod(HotSpotCompiledNmethod::method(compiled_code));
 543     jint entry_bci = HotSpotCompiledNmethod::entryBCI(compiled_code);
 544     jint id = HotSpotCompiledNmethod::id(compiled_code);
 545     bool has_unsafe_access = HotSpotCompiledNmethod::hasUnsafeAccess(compiled_code) == JNI_TRUE;
 546     JVMCIEnv* env = (JVMCIEnv*) (address) HotSpotCompiledNmethod::jvmciEnv(compiled_code);
 547     if (id == -1) {
 548       // Make sure a valid compile_id is associated with every compile
 549       id = CompileBroker::assign_compile_id_unlocked(Thread::current(), method, entry_bci);
 550     }
 551     result = JVMCIEnv::register_method(method, nm, entry_bci, &_offsets, _custom_stack_area_offset, &buffer,
 552                                        stack_slots, _debug_recorder->_oopmaps, &_exception_handler_table,
 553                                        compiler, _debug_recorder, _dependencies, env, id,
 554                                        has_unsafe_access, _has_wide_vector, installed_code, compiled_code, speculation_log);
 555     cb = nm;
 556   }
 557 
 558   if (cb != NULL) {
 559     // Make sure the pre-calculated constants section size was correct.
 560     guarantee((cb->code_begin() - cb->content_begin()) >= _constants_size, "%d < %d", (int)(cb->code_begin() - cb->content_begin()), _constants_size);
 561   }
 562   return result;
 563 }
 564 
 565 void CodeInstaller::initialize_fields(oop target, oop compiled_code, TRAPS) {
 566   if (compiled_code->is_a(HotSpotCompiledNmethod::klass())) {
 567     Handle hotspotJavaMethod = HotSpotCompiledNmethod::method(compiled_code);
 568     methodHandle method = getMethodFromHotSpotMethod(hotspotJavaMethod());
 569     _parameter_count = method->size_of_parameters();
 570     TRACE_jvmci_2("installing code for %s", method->name_and_sig_as_C_string());
 571   } else {
 572     // Must be a HotSpotCompiledRuntimeStub.
 573     // Only used in OopMap constructor for non-product builds
 574     _parameter_count = 0;
 575   }
 576   _sites_handle = JNIHandles::make_local(HotSpotCompiledCode::sites(compiled_code));
 577   _exception_handlers_handle = JNIHandles::make_local(HotSpotCompiledCode::exceptionHandlers(compiled_code));
 578 
 579   _code_handle = JNIHandles::make_local(HotSpotCompiledCode::targetCode(compiled_code));
 580   _code_size = HotSpotCompiledCode::targetCodeSize(compiled_code);
 581   _total_frame_size = HotSpotCompiledCode::totalFrameSize(compiled_code);
 582   _custom_stack_area_offset = HotSpotCompiledCode::customStackAreaOffset(compiled_code);
 583 
 584   // Pre-calculate the constants section size.  This is required for PC-relative addressing.
 585   _data_section_handle = JNIHandles::make_local(HotSpotCompiledCode::dataSection(compiled_code));
 586   if ((_constants->alignment() % HotSpotCompiledCode::dataSectionAlignment(compiled_code)) != 0) {
 587     JVMCI_ERROR("invalid data section alignment: %d", HotSpotCompiledCode::dataSectionAlignment(compiled_code));
 588   }
 589   _constants_size = data_section()->length();
 590 
 591   _data_section_patches_handle = JNIHandles::make_local(HotSpotCompiledCode::dataSectionPatches(compiled_code));
 592 
 593 #ifndef PRODUCT
 594   _comments_handle = JNIHandles::make_local(HotSpotCompiledCode::comments(compiled_code));
 595 #endif
 596 
 597   _next_call_type = INVOKE_INVALID;
 598 
 599   _has_wide_vector = false;
 600 
 601   oop arch = TargetDescription::arch(target);
 602   _word_kind_handle = JNIHandles::make_local(Architecture::wordKind(arch));
 603 }
 604 
 605 int CodeInstaller::estimate_stubs_size(TRAPS) {
 606   // Estimate the number of static call stubs that might be emitted.
 607   int static_call_stubs = 0;
 608   objArrayOop sites = this->sites();
 609   for (int i = 0; i < sites->length(); i++) {
 610     oop site = sites->obj_at(i);
 611     if (site != NULL && site->is_a(CompilationResult_Mark::klass())) {
 612       oop id_obj = CompilationResult_Mark::id(site);
 613       if (id_obj != NULL) {
 614         if (!java_lang_boxing_object::is_instance(id_obj, T_INT)) {
 615           JVMCI_ERROR_0("expected Integer id, got %s", id_obj->klass()->signature_name());
 616         }
 617         jint id = id_obj->int_field(java_lang_boxing_object::value_offset_in_bytes(T_INT));
 618         if (id == INVOKESTATIC || id == INVOKESPECIAL) {
 619           static_call_stubs++;
 620         }
 621       }
 622     }
 623   }
 624   return static_call_stubs * CompiledStaticCall::to_interp_stub_size();
 625 }
 626 
 627 // perform data and call relocation on the CodeBuffer
 628 JVMCIEnv::CodeInstallResult CodeInstaller::initialize_buffer(CodeBuffer& buffer, TRAPS) {
 629   HandleMark hm;
 630   objArrayHandle sites = this->sites();
 631   int locs_buffer_size = sites->length() * (relocInfo::length_limit + sizeof(relocInfo));
 632 
 633   // Allocate enough space in the stub section for the static call
 634   // stubs.  Stubs have extra relocs but they are managed by the stub
 635   // section itself so they don't need to be accounted for in the
 636   // locs_buffer above.
 637   int stubs_size = estimate_stubs_size(CHECK_OK);
 638   int total_size = round_to(_code_size, buffer.insts()->alignment()) + round_to(_constants_size, buffer.consts()->alignment()) + round_to(stubs_size, buffer.stubs()->alignment());
 639 
 640   if (total_size > JVMCINMethodSizeLimit) {
 641     return JVMCIEnv::code_too_large;
 642   }
 643 
 644   buffer.initialize(total_size, locs_buffer_size);
 645   if (buffer.blob() == NULL) {
 646     return JVMCIEnv::cache_full;
 647   }
 648   buffer.initialize_stubs_size(stubs_size);
 649   buffer.initialize_consts_size(_constants_size);
 650 
 651   _debug_recorder = new DebugInformationRecorder(_oop_recorder);
 652   _debug_recorder->set_oopmaps(new OopMapSet());
 653 
 654   buffer.initialize_oop_recorder(_oop_recorder);
 655 
 656   // copy the constant data into the newly created CodeBuffer
 657   address end_data = _constants->start() + _constants_size;
 658   memcpy(_constants->start(), data_section()->base(T_BYTE), _constants_size);
 659   _constants->set_end(end_data);
 660 
 661   // copy the code into the newly created CodeBuffer
 662   address end_pc = _instructions->start() + _code_size;
 663   guarantee(_instructions->allocates2(end_pc), "initialize should have reserved enough space for all the code");
 664   memcpy(_instructions->start(), code()->base(T_BYTE), _code_size);
 665   _instructions->set_end(end_pc);
 666 
 667   for (int i = 0; i < data_section_patches()->length(); i++) {
 668     Handle patch = data_section_patches()->obj_at(i);
 669     if (patch.is_null()) {
 670       THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
 671     }
 672     Handle reference = CompilationResult_DataPatch::reference(patch);
 673     if (reference.is_null()) {
 674       THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
 675     }
 676     if (!reference->is_a(CompilationResult_ConstantReference::klass())) {
 677       JVMCI_ERROR_OK("invalid patch in data section: %s", reference->klass()->signature_name());
 678     }
 679     Handle constant = CompilationResult_ConstantReference::constant(reference);
 680     if (constant.is_null()) {
 681       THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
 682     }
 683     address dest = _constants->start() + CompilationResult_Site::pcOffset(patch);
 684     if (constant->is_a(HotSpotMetaspaceConstantImpl::klass())) {
 685       if (HotSpotMetaspaceConstantImpl::compressed(constant)) {
 686 #ifdef _LP64
 687         *((narrowKlass*) dest) = record_narrow_metadata_reference(constant, CHECK_OK);
 688 #else
 689         JVMCI_ERROR_OK("unexpected compressed Klass* in 32-bit mode");
 690 #endif
 691       } else {
 692         *((Metadata**) dest) = record_metadata_reference(constant, CHECK_OK);
 693       }
 694     } else if (constant->is_a(HotSpotObjectConstantImpl::klass())) {
 695       Handle obj = HotSpotObjectConstantImpl::object(constant);
 696       jobject value = JNIHandles::make_local(obj());
 697       int oop_index = _oop_recorder->find_index(value);
 698 
 699       if (HotSpotObjectConstantImpl::compressed(constant)) {
 700 #ifdef _LP64
 701         _constants->relocate(dest, oop_Relocation::spec(oop_index), relocInfo::narrow_oop_in_const);
 702 #else
 703         JVMCI_ERROR_OK("unexpected compressed oop in 32-bit mode");
 704 #endif
 705       } else {
 706         _constants->relocate(dest, oop_Relocation::spec(oop_index));
 707       }
 708     } else {
 709       JVMCI_ERROR_OK("invalid constant in data section: %s", constant->klass()->signature_name());
 710     }
 711   }
 712   jint last_pc_offset = -1;
 713   for (int i = 0; i < sites->length(); i++) {
 714     Handle site = sites->obj_at(i);
 715     if (site.is_null()) {
 716       THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
 717     }
 718 
 719     jint pc_offset = CompilationResult_Site::pcOffset(site);
 720 
 721     if (site->is_a(CompilationResult_Call::klass())) {
 722       TRACE_jvmci_4("call at %i", pc_offset);
 723       site_Call(buffer, pc_offset, site, CHECK_OK);
 724     } else if (site->is_a(CompilationResult_Infopoint::klass())) {
 725       // three reasons for infopoints denote actual safepoints
 726       oop reason = CompilationResult_Infopoint::reason(site);
 727       if (InfopointReason::SAFEPOINT() == reason || InfopointReason::CALL() == reason || InfopointReason::IMPLICIT_EXCEPTION() == reason) {
 728         TRACE_jvmci_4("safepoint at %i", pc_offset);
 729         site_Safepoint(buffer, pc_offset, site, CHECK_OK);
 730       } else if (InfopointReason::METHOD_START() == reason || InfopointReason::METHOD_END() == reason || InfopointReason::LINE_NUMBER() == reason) {
 731         site_Infopoint(buffer, pc_offset, site, CHECK_OK);
 732       } else {
 733         JVMCI_ERROR_OK("unknown infopoint reason at %i", pc_offset);
 734       }
 735     } else if (site->is_a(CompilationResult_DataPatch::klass())) {
 736       TRACE_jvmci_4("datapatch at %i", pc_offset);
 737       site_DataPatch(buffer, pc_offset, site, CHECK_OK);
 738     } else if (site->is_a(CompilationResult_Mark::klass())) {
 739       TRACE_jvmci_4("mark at %i", pc_offset);
 740       site_Mark(buffer, pc_offset, site, CHECK_OK);
 741     } else {
 742       JVMCI_ERROR_OK("unexpected site subclass: %s", site->klass()->signature_name());
 743     }
 744     last_pc_offset = pc_offset;
 745 
 746     if (CodeInstallSafepointChecks && SafepointSynchronize::do_call_back()) {
 747       // this is a hacky way to force a safepoint check but nothing else was jumping out at me.
 748       ThreadToNativeFromVM ttnfv(JavaThread::current());
 749     }
 750   }
 751 
 752 #ifndef PRODUCT
 753   if (comments() != NULL) {
 754     for (int i = 0; i < comments()->length(); i++) {
 755       oop comment = comments()->obj_at(i);
 756       assert(comment->is_a(HotSpotCompiledCode_Comment::klass()), "cce");
 757       jint offset = HotSpotCompiledCode_Comment::pcOffset(comment);
 758       char* text = java_lang_String::as_utf8_string(HotSpotCompiledCode_Comment::text(comment));
 759       buffer.block_comment(offset, text);
 760     }
 761   }
 762 #endif
 763   return JVMCIEnv::ok;
 764 }
 765 
 766 void CodeInstaller::assumption_NoFinalizableSubclass(Handle assumption) {
 767   Handle receiverType_handle = Assumptions_NoFinalizableSubclass::receiverType(assumption());
 768   Klass* receiverType = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(receiverType_handle));
 769   _dependencies->assert_has_no_finalizable_subclasses(receiverType);
 770 }
 771 
 772 void CodeInstaller::assumption_ConcreteSubtype(Handle assumption) {
 773   Handle context_handle = Assumptions_ConcreteSubtype::context(assumption());
 774   Handle subtype_handle = Assumptions_ConcreteSubtype::subtype(assumption());
 775   Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));
 776   Klass* subtype = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(subtype_handle));
 777 
 778   assert(context->is_abstract(), "");
 779   _dependencies->assert_abstract_with_unique_concrete_subtype(context, subtype);
 780 }
 781 
 782 void CodeInstaller::assumption_LeafType(Handle assumption) {
 783   Handle context_handle = Assumptions_LeafType::context(assumption());
 784   Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));
 785 
 786   _dependencies->assert_leaf_type(context);
 787 }
 788 
 789 void CodeInstaller::assumption_ConcreteMethod(Handle assumption) {
 790   Handle impl_handle = Assumptions_ConcreteMethod::impl(assumption());
 791   Handle context_handle = Assumptions_ConcreteMethod::context(assumption());
 792 
 793   methodHandle impl = getMethodFromHotSpotMethod(impl_handle());
 794   Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));
 795 
 796   _dependencies->assert_unique_concrete_method(context, impl());
 797 }
 798 
 799 void CodeInstaller::assumption_CallSiteTargetValue(Handle assumption) {
 800   Handle callSite = Assumptions_CallSiteTargetValue::callSite(assumption());
 801   Handle methodHandle = Assumptions_CallSiteTargetValue::methodHandle(assumption());
 802 
 803   _dependencies->assert_call_site_target_value(callSite(), methodHandle());
 804 }
 805 
 806 void CodeInstaller::process_exception_handlers() {
 807   if (exception_handlers() != NULL) {
 808     objArrayOop handlers = exception_handlers();
 809     for (int i = 0; i < handlers->length(); i++) {
 810       oop exc = handlers->obj_at(i);
 811       jint pc_offset = CompilationResult_Site::pcOffset(exc);
 812       jint handler_offset = CompilationResult_ExceptionHandler::handlerPos(exc);
 813 
 814       // Subtable header
 815       _exception_handler_table.add_entry(HandlerTableEntry(1, pc_offset, 0));
 816 
 817       // Subtable entry
 818       _exception_handler_table.add_entry(HandlerTableEntry(-1, handler_offset, 0));
 819     }
 820   }
 821 }
 822 
 823 // If deoptimization happens, the interpreter should reexecute these bytecodes.
 824 // This function mainly helps the compilers to set up the reexecute bit.
 825 static bool bytecode_should_reexecute(Bytecodes::Code code) {
 826   switch (code) {
 827     case Bytecodes::_invokedynamic:
 828     case Bytecodes::_invokevirtual:
 829     case Bytecodes::_invokeinterface:
 830     case Bytecodes::_invokespecial:
 831     case Bytecodes::_invokestatic:
 832       return false;
 833     default:
 834       return true;
 835     }
 836   return true;
 837 }
 838 
 839 GrowableArray<ScopeValue*>* CodeInstaller::record_virtual_objects(Handle debug_info, TRAPS) {
 840   objArrayHandle virtualObjects = DebugInfo::virtualObjectMapping(debug_info);
 841   if (virtualObjects.is_null()) {
 842     return NULL;
 843   }
 844   GrowableArray<ScopeValue*>* objects = new GrowableArray<ScopeValue*>(virtualObjects->length(), virtualObjects->length(), NULL);
 845   // Create the unique ObjectValues
 846   for (int i = 0; i < virtualObjects->length(); i++) {
 847     Handle value = virtualObjects->obj_at(i);
 848     int id = VirtualObject::id(value);
 849     Handle type = VirtualObject::type(value);
 850     oop javaMirror = HotSpotResolvedObjectTypeImpl::javaClass(type);
 851     ObjectValue* sv = new ObjectValue(id, new ConstantOopWriteValue(JNIHandles::make_local(Thread::current(), javaMirror)));
 852     if (id < 0 || id >= objects->length()) {
 853       JVMCI_ERROR_NULL("virtual object id %d out of bounds", id);
 854     }
 855     if (objects->at(id) != NULL) {
 856       JVMCI_ERROR_NULL("duplicate virtual object id %d", id);
 857     }
 858     objects->at_put(id, sv);
 859   }
 860   // All the values which could be referenced by the VirtualObjects
 861   // exist, so now describe all the VirtualObjects themselves.
 862   for (int i = 0; i < virtualObjects->length(); i++) {
 863     Handle value = virtualObjects->obj_at(i);
 864     int id = VirtualObject::id(value);
 865     record_object_value(objects->at(id)->as_ObjectValue(), value, objects, CHECK_NULL);
 866   }
 867   _debug_recorder->dump_object_pool(objects);
 868   return objects;
 869 }
 870 
 871 void CodeInstaller::record_scope(jint pc_offset, Handle debug_info, TRAPS) {
 872   Handle position = DebugInfo::bytecodePosition(debug_info);
 873   if (position.is_null()) {
 874     // Stubs do not record scope info, just oop maps
 875     return;
 876   }
 877 
 878   GrowableArray<ScopeValue*>* objectMapping = record_virtual_objects(debug_info, CHECK);
 879   record_scope(pc_offset, position, objectMapping, CHECK);
 880 }
 881 
 882 void CodeInstaller::record_scope(jint pc_offset, Handle position, GrowableArray<ScopeValue*>* objects, TRAPS) {
 883   Handle frame;
 884   if (position->is_a(BytecodeFrame::klass())) {
 885     frame = position;
 886   }
 887   Handle caller_frame = BytecodePosition::caller(position);
 888   if (caller_frame.not_null()) {
 889     record_scope(pc_offset, caller_frame, objects, CHECK);
 890   }
 891 
 892   Handle hotspot_method = BytecodePosition::method(position);
 893   Method* method = getMethodFromHotSpotMethod(hotspot_method());
 894   jint bci = BytecodePosition::bci(position);
 895   if (bci == BytecodeFrame::BEFORE_BCI()) {
 896     bci = SynchronizationEntryBCI;
 897   }
 898 
 899   TRACE_jvmci_2("Recording scope pc_offset=%d bci=%d method=%s", pc_offset, bci, method->name_and_sig_as_C_string());
 900 
 901   bool reexecute = false;
 902   if (frame.not_null()) {
 903     if (bci == SynchronizationEntryBCI){
 904        reexecute = false;
 905     } else {
 906       Bytecodes::Code code = Bytecodes::java_code_at(method, method->bcp_from(bci));
 907       reexecute = bytecode_should_reexecute(code);
 908       if (frame.not_null()) {
 909         reexecute = (BytecodeFrame::duringCall(frame) == JNI_FALSE);
 910       }
 911     }
 912   }
 913 
 914   DebugToken* locals_token = NULL;
 915   DebugToken* expressions_token = NULL;
 916   DebugToken* monitors_token = NULL;
 917   bool throw_exception = false;
 918 
 919   if (frame.not_null()) {
 920     jint local_count = BytecodeFrame::numLocals(frame);
 921     jint expression_count = BytecodeFrame::numStack(frame);
 922     jint monitor_count = BytecodeFrame::numLocks(frame);
 923     objArrayHandle values = BytecodeFrame::values(frame);
 924     objArrayHandle slotKinds = BytecodeFrame::slotKinds(frame);
 925 
 926     if (values.is_null() || slotKinds.is_null()) {
 927       THROW(vmSymbols::java_lang_NullPointerException());
 928     }
 929     if (local_count + expression_count + monitor_count != values->length()) {
 930       JVMCI_ERROR("unexpected values length %d in scope (%d locals, %d expressions, %d monitors)", values->length(), local_count, expression_count, monitor_count);
 931     }
 932     if (local_count + expression_count != slotKinds->length()) {
 933       JVMCI_ERROR("unexpected slotKinds length %d in scope (%d locals, %d expressions)", slotKinds->length(), local_count, expression_count);
 934     }
 935 
 936     GrowableArray<ScopeValue*>* locals = local_count > 0 ? new GrowableArray<ScopeValue*> (local_count) : NULL;
 937     GrowableArray<ScopeValue*>* expressions = expression_count > 0 ? new GrowableArray<ScopeValue*> (expression_count) : NULL;
 938     GrowableArray<MonitorValue*>* monitors = monitor_count > 0 ? new GrowableArray<MonitorValue*> (monitor_count) : NULL;
 939 
 940     TRACE_jvmci_2("Scope at bci %d with %d values", bci, values->length());
 941     TRACE_jvmci_2("%d locals %d expressions, %d monitors", local_count, expression_count, monitor_count);
 942 
 943     for (jint i = 0; i < values->length(); i++) {
 944       ScopeValue* second = NULL;
 945       Handle value = values->obj_at(i);
 946       if (i < local_count) {
 947         BasicType type = JVMCIRuntime::kindToBasicType(slotKinds->obj_at(i), CHECK);
 948         ScopeValue* first = get_scope_value(value, type, objects, second, CHECK);
 949         if (second != NULL) {
 950           locals->append(second);
 951         }
 952         locals->append(first);
 953       } else if (i < local_count + expression_count) {
 954         BasicType type = JVMCIRuntime::kindToBasicType(slotKinds->obj_at(i), CHECK);
 955         ScopeValue* first = get_scope_value(value, type, objects, second, CHECK);
 956         if (second != NULL) {
 957           expressions->append(second);
 958         }
 959         expressions->append(first);
 960       } else {
 961         MonitorValue *monitor = get_monitor_value(value, objects, CHECK);
 962         monitors->append(monitor);
 963       }
 964       if (second != NULL) {
 965         i++;
 966         if (i >= values->length() || values->obj_at(i) != Value::ILLEGAL()) {
 967           JVMCI_ERROR("double-slot value not followed by Value.ILLEGAL");
 968         }
 969       }
 970     }
 971 
 972     locals_token = _debug_recorder->create_scope_values(locals);
 973     expressions_token = _debug_recorder->create_scope_values(expressions);
 974     monitors_token = _debug_recorder->create_monitor_values(monitors);
 975 
 976     throw_exception = BytecodeFrame::rethrowException(frame) == JNI_TRUE;
 977   }
 978 
 979   _debug_recorder->describe_scope(pc_offset, method, NULL, bci, reexecute, throw_exception, false, false,
 980                                   locals_token, expressions_token, monitors_token);
 981 }
 982 
 983 void CodeInstaller::site_Safepoint(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
 984   Handle debug_info = CompilationResult_Infopoint::debugInfo(site);
 985   if (debug_info.is_null()) {
 986     JVMCI_ERROR("debug info expected at safepoint at %i", pc_offset);
 987   }
 988 
 989   // address instruction = _instructions->start() + pc_offset;
 990   // jint next_pc_offset = Assembler::locate_next_instruction(instruction) - _instructions->start();
 991   OopMap *map = create_oop_map(debug_info, CHECK);
 992   _debug_recorder->add_safepoint(pc_offset, map);
 993   record_scope(pc_offset, debug_info, CHECK);
 994   _debug_recorder->end_safepoint(pc_offset);
 995 }
 996 
 997 void CodeInstaller::site_Infopoint(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
 998   Handle debug_info = CompilationResult_Infopoint::debugInfo(site);
 999   if (debug_info.is_null()) {
1000     JVMCI_ERROR("debug info expected at infopoint at %i", pc_offset);
1001   }
1002 
1003   _debug_recorder->add_non_safepoint(pc_offset);
1004   record_scope(pc_offset, debug_info, CHECK);
1005   _debug_recorder->end_non_safepoint(pc_offset);
1006 }
1007 
1008 void CodeInstaller::site_Call(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
1009   Handle target = CompilationResult_Call::target(site);
1010   InstanceKlass* target_klass = InstanceKlass::cast(target->klass());
1011 
1012   Handle hotspot_method; // JavaMethod
1013   Handle foreign_call;
1014 
1015   if (target_klass->is_subclass_of(SystemDictionary::HotSpotForeignCallTarget_klass())) {
1016     foreign_call = target;
1017   } else {
1018     hotspot_method = target;
1019   }
1020 
1021   Handle debug_info = CompilationResult_Call::debugInfo(site);
1022 
1023   assert(hotspot_method.not_null() ^ foreign_call.not_null(), "Call site needs exactly one type");
1024 
1025   NativeInstruction* inst = nativeInstruction_at(_instructions->start() + pc_offset);
1026   jint next_pc_offset = CodeInstaller::pd_next_offset(inst, pc_offset, hotspot_method, CHECK);
1027 
1028   if (debug_info.not_null()) {
1029     OopMap *map = create_oop_map(debug_info, CHECK);
1030     _debug_recorder->add_safepoint(next_pc_offset, map);
1031     record_scope(next_pc_offset, debug_info, CHECK);
1032   }
1033 
1034   if (foreign_call.not_null()) {
1035     jlong foreign_call_destination = HotSpotForeignCallTarget::address(foreign_call);
1036     CodeInstaller::pd_relocate_ForeignCall(inst, foreign_call_destination, CHECK);
1037   } else { // method != NULL
1038     if (debug_info.is_null()) {
1039       JVMCI_ERROR("debug info expected at call at %i", pc_offset);
1040     }
1041 
1042     TRACE_jvmci_3("method call");
1043     CodeInstaller::pd_relocate_JavaMethod(hotspot_method, pc_offset, CHECK);
1044     if (_next_call_type == INVOKESTATIC || _next_call_type == INVOKESPECIAL) {
1045       // Need a static call stub for transitions from compiled to interpreted.
1046       CompiledStaticCall::emit_to_interp_stub(buffer, _instructions->start() + pc_offset);
1047     }
1048   }
1049 
1050   _next_call_type = INVOKE_INVALID;
1051 
1052   if (debug_info.not_null()) {
1053     _debug_recorder->end_safepoint(next_pc_offset);
1054   }
1055 }
1056 
1057 void CodeInstaller::site_DataPatch(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
1058   Handle reference = CompilationResult_DataPatch::reference(site);
1059   if (reference.is_null()) {
1060     THROW(vmSymbols::java_lang_NullPointerException());
1061   } else if (reference->is_a(CompilationResult_ConstantReference::klass())) {
1062     Handle constant = CompilationResult_ConstantReference::constant(reference);
1063     if (constant.is_null()) {
1064       THROW(vmSymbols::java_lang_NullPointerException());
1065     } else if (constant->is_a(HotSpotObjectConstantImpl::klass())) {
1066       pd_patch_OopConstant(pc_offset, constant, CHECK);
1067     } else if (constant->is_a(HotSpotMetaspaceConstantImpl::klass())) {
1068       pd_patch_MetaspaceConstant(pc_offset, constant, CHECK);
1069     } else {
1070       JVMCI_ERROR("unknown constant type in data patch: %s", constant->klass()->signature_name());
1071     }
1072   } else if (reference->is_a(CompilationResult_DataSectionReference::klass())) {
1073     int data_offset = CompilationResult_DataSectionReference::offset(reference);
1074     if (0 <= data_offset && data_offset < _constants_size) {
1075       pd_patch_DataSectionReference(pc_offset, data_offset);
1076     } else {
1077       JVMCI_ERROR("data offset 0x%X points outside data section (size 0x%X)", data_offset, _constants_size);
1078     }
1079   } else {
1080     JVMCI_ERROR("unknown data patch type: %s", reference->klass()->signature_name());
1081   }
1082 }
1083 
1084 void CodeInstaller::site_Mark(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
1085   Handle id_obj = CompilationResult_Mark::id(site);
1086 
1087   if (id_obj.not_null()) {
1088     if (!java_lang_boxing_object::is_instance(id_obj(), T_INT)) {
1089       JVMCI_ERROR("expected Integer id, got %s", id_obj->klass()->signature_name());
1090     }
1091     jint id = id_obj->int_field(java_lang_boxing_object::value_offset_in_bytes(T_INT));
1092 
1093     address pc = _instructions->start() + pc_offset;
1094 
1095     switch (id) {
1096       case UNVERIFIED_ENTRY:
1097         _offsets.set_value(CodeOffsets::Entry, pc_offset);
1098         break;
1099       case VERIFIED_ENTRY:
1100         _offsets.set_value(CodeOffsets::Verified_Entry, pc_offset);
1101         break;
1102       case OSR_ENTRY:
1103         _offsets.set_value(CodeOffsets::OSR_Entry, pc_offset);
1104         break;
1105       case EXCEPTION_HANDLER_ENTRY:
1106         _offsets.set_value(CodeOffsets::Exceptions, pc_offset);
1107         break;
1108       case DEOPT_HANDLER_ENTRY:
1109         _offsets.set_value(CodeOffsets::Deopt, pc_offset);
1110         break;
1111       case INVOKEVIRTUAL:
1112       case INVOKEINTERFACE:
1113       case INLINE_INVOKE:
1114       case INVOKESTATIC:
1115       case INVOKESPECIAL:
1116         _next_call_type = (MarkId) id;
1117         _invoke_mark_pc = pc;
1118         break;
1119       case POLL_NEAR:
1120       case POLL_FAR:
1121       case POLL_RETURN_NEAR:
1122       case POLL_RETURN_FAR:
1123         pd_relocate_poll(pc, id, CHECK);
1124         break;
1125       case CARD_TABLE_SHIFT:
1126       case CARD_TABLE_ADDRESS:
1127       case HEAP_TOP_ADDRESS:
1128       case HEAP_END_ADDRESS:
1129       case NARROW_KLASS_BASE_ADDRESS:
1130       case CRC_TABLE_ADDRESS:
1131         break;
1132       default:
1133         JVMCI_ERROR("invalid mark id: %d", id);
1134         break;
1135     }
1136   }
1137 }
1138