1 /*

     2  * Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 #include "precompiled.hpp"

    25 #include "asm/register.hpp"

    26 #include "classfile/vmSymbols.hpp"

    27 #include "code/compiledIC.hpp"

    28 #include "code/vmreg.inline.hpp"

    29 #include "compiler/compileBroker.hpp"

    30 #include "compiler/disassembler.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 "oops/oop.inline.hpp"

    38 #include "oops/objArrayOop.inline.hpp"

    39 #include "runtime/javaCalls.hpp"

    40 #include "utilities/align.hpp"

    41 

    42 // frequently used constants

    43 // Allocate them with new so they are never destroyed (otherwise, a

    44 // forced exit could destroy these objects while they are still in

    45 // use).

    46 ConstantOopWriteValue* CodeInstaller::_oop_null_scope_value = new (ResourceObj::C_HEAP, mtCompiler) ConstantOopWriteValue(NULL);

    47 ConstantIntValue*      CodeInstaller::_int_m1_scope_value = new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(-1);

    48 ConstantIntValue*      CodeInstaller::_int_0_scope_value =  new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(0);

    49 ConstantIntValue*      CodeInstaller::_int_1_scope_value =  new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(1);

    50 ConstantIntValue*      CodeInstaller::_int_2_scope_value =  new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(2);

    51 LocationValue*         CodeInstaller::_illegal_value = new (ResourceObj::C_HEAP, mtCompiler) LocationValue(Location());

    52 

    53 Method* getMethodFromHotSpotMethod(oop hotspot_method) {

    54   assert(hotspot_method != NULL && hotspot_method->is_a(HotSpotResolvedJavaMethodImpl::klass()), "sanity");

    55   return CompilerToVM::asMethod(hotspot_method);

    56 }

    57 

    58 VMReg getVMRegFromLocation(Handle location, int total_frame_size, TRAPS) {

    59   if (location.is_null()) {

    60     THROW_NULL(vmSymbols::java_lang_NullPointerException());

    61   }

    62 

    63   Handle reg(THREAD, code_Location::reg(location));

    64   jint offset = code_Location::offset(location);

    65 

    66   if (reg.not_null()) {

    67     // register

    68     jint number = code_Register::number(reg);

    69     VMReg vmReg = CodeInstaller::get_hotspot_reg(number, CHECK_NULL);

    70     if (offset % 4 == 0) {

    71       return vmReg->next(offset / 4);

    72     } else {

    73       JVMCI_ERROR_NULL("unaligned subregister offset %d in oop map", offset);

    74     }

    75   } else {

    76     // stack slot

    77     if (offset % 4 == 0) {

    78       VMReg vmReg = VMRegImpl::stack2reg(offset / 4);

    79       if (!OopMapValue::legal_vm_reg_name(vmReg)) {

    80         // This restriction only applies to VMRegs that are used in OopMap but

    81         // since that's the only use of VMRegs it's simplest to put this test

    82         // here.  This test should also be equivalent legal_vm_reg_name but JVMCI

    83         // clients can use max_oop_map_stack_stack_offset to detect this problem

    84         // directly.  The asserts just ensure that the tests are in agreement.

    85         assert(offset > CompilerToVM::Data::max_oop_map_stack_offset(), "illegal VMReg");

    86         JVMCI_ERROR_NULL("stack offset %d is too large to be encoded in OopMap (max %d)",

    87                          offset, CompilerToVM::Data::max_oop_map_stack_offset());

    88       }

    89       assert(OopMapValue::legal_vm_reg_name(vmReg), "illegal VMReg");

    90       return vmReg;

    91     } else {

    92       JVMCI_ERROR_NULL("unaligned stack offset %d in oop map", offset);

    93     }

    94   }

    95 }

    96 

    97 // creates a HotSpot oop map out of the byte arrays provided by DebugInfo

    98 OopMap* CodeInstaller::create_oop_map(Handle debug_info, TRAPS) {

    99   Handle reference_map(THREAD, DebugInfo::referenceMap(debug_info));

   100   if (reference_map.is_null()) {

   101     THROW_NULL(vmSymbols::java_lang_NullPointerException());

   102   }

   103   if (!reference_map->is_a(HotSpotReferenceMap::klass())) {

   104     JVMCI_ERROR_NULL("unknown reference map: %s", reference_map->klass()->signature_name());

   105   }

   106   if (HotSpotReferenceMap::maxRegisterSize(reference_map) > 16) {

   107     _has_wide_vector = true;

   108   }

   109   OopMap* map = new OopMap(_total_frame_size, _parameter_count);

   110   objArrayHandle objects(THREAD, HotSpotReferenceMap::objects(reference_map));

   111   objArrayHandle derivedBase(THREAD, HotSpotReferenceMap::derivedBase(reference_map));

   112   typeArrayHandle sizeInBytes(THREAD, HotSpotReferenceMap::sizeInBytes(reference_map));

   113   if (objects.is_null() || derivedBase.is_null() || sizeInBytes.is_null()) {

   114     THROW_NULL(vmSymbols::java_lang_NullPointerException());

   115   }

   116   if (objects->length() != derivedBase->length() || objects->length() != sizeInBytes->length()) {

   117     JVMCI_ERROR_NULL("arrays in reference map have different sizes: %d %d %d", objects->length(), derivedBase->length(), sizeInBytes->length());

   118   }

   119   for (int i = 0; i < objects->length(); i++) {

   120     Handle location(THREAD, objects->obj_at(i));

   121     Handle baseLocation(THREAD, derivedBase->obj_at(i));

   122     int bytes = sizeInBytes->int_at(i);

   123 

   124     VMReg vmReg = getVMRegFromLocation(location, _total_frame_size, CHECK_NULL);

   125     if (baseLocation.not_null()) {

   126       // derived oop

   127 #ifdef _LP64

   128       if (bytes == 8) {

   129 #else

   130       if (bytes == 4) {

   131 #endif

   132         VMReg baseReg = getVMRegFromLocation(baseLocation, _total_frame_size, CHECK_NULL);

   133         map->set_derived_oop(vmReg, baseReg);

   134       } else {

   135         JVMCI_ERROR_NULL("invalid derived oop size in ReferenceMap: %d", bytes);

   136       }

   137 #ifdef _LP64

   138     } else if (bytes == 8) {

   139       // wide oop

   140       map->set_oop(vmReg);

   141     } else if (bytes == 4) {

   142       // narrow oop

   143       map->set_narrowoop(vmReg);

   144 #else

   145     } else if (bytes == 4) {

   146       map->set_oop(vmReg);

   147 #endif

   148     } else {

   149       JVMCI_ERROR_NULL("invalid oop size in ReferenceMap: %d", bytes);

   150     }

   151   }

   152 

   153   Handle callee_save_info(THREAD, (oop) DebugInfo::calleeSaveInfo(debug_info));

   154   if (callee_save_info.not_null()) {

   155     objArrayHandle registers(THREAD, RegisterSaveLayout::registers(callee_save_info));

   156     typeArrayHandle slots(THREAD, RegisterSaveLayout::slots(callee_save_info));

   157     for (jint i = 0; i < slots->length(); i++) {

   158       Handle jvmci_reg (THREAD, registers->obj_at(i));

   159       jint jvmci_reg_number = code_Register::number(jvmci_reg);

   160       VMReg hotspot_reg = CodeInstaller::get_hotspot_reg(jvmci_reg_number, CHECK_NULL);

   161       // HotSpot stack slots are 4 bytes

   162       jint jvmci_slot = slots->int_at(i);

   163       jint hotspot_slot = jvmci_slot * VMRegImpl::slots_per_word;

   164       VMReg hotspot_slot_as_reg = VMRegImpl::stack2reg(hotspot_slot);

   165       map->set_callee_saved(hotspot_slot_as_reg, hotspot_reg);

   166 #ifdef _LP64

   167       // (copied from generate_oop_map() in c1_Runtime1_x86.cpp)

   168       VMReg hotspot_slot_hi_as_reg = VMRegImpl::stack2reg(hotspot_slot + 1);

   169       map->set_callee_saved(hotspot_slot_hi_as_reg, hotspot_reg->next());

   170 #endif

   171     }

   172   }

   173   return map;

   174 }

   175 

   176 AOTOopRecorder::AOTOopRecorder(Arena* arena, bool deduplicate) : OopRecorder(arena, deduplicate) {

   177   _meta_strings = new GrowableArray<const char*>();

   178 }

   179 

   180 int AOTOopRecorder::nr_meta_strings() const {

   181   return _meta_strings->length();

   182 }

   183 

   184 const char* AOTOopRecorder::meta_element(int pos) const {

   185   return _meta_strings->at(pos);

   186 }

   187 

   188 int AOTOopRecorder::find_index(Metadata* h) {

   189   int index =  this->OopRecorder::find_index(h);

   190 

   191   Klass* klass = NULL;

   192   if (h->is_klass()) {

   193     klass = (Klass*) h;

   194     record_meta_string(klass->signature_name(), index);

   195   } else if (h->is_method()) {

   196     Method* method = (Method*) h;

   197     // Need klass->signature_name() in method name

   198     klass = method->method_holder();

   199     const char* klass_name = klass->signature_name();

   200     int klass_name_len  = (int)strlen(klass_name);

   201     Symbol* method_name = method->name();

   202     Symbol* signature   = method->signature();

   203     int method_name_len = method_name->utf8_length();

   204     int method_sign_len = signature->utf8_length();

   205     int len             = klass_name_len + 1 + method_name_len + method_sign_len;

   206     char* dest          = NEW_RESOURCE_ARRAY(char, len + 1);

   207     strcpy(dest, klass_name);

   208     dest[klass_name_len] = '.';

   209     strcpy(&dest[klass_name_len + 1], method_name->as_C_string());

   210     strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string());

   211     dest[len] = 0;

   212     record_meta_string(dest, index);

   213   }

   214 

   215   return index;

   216 }

   217 

   218 int AOTOopRecorder::find_index(jobject h) {

   219   if (h == NULL) {

   220     return 0;

   221   }

   222   oop javaMirror = JNIHandles::resolve(h);

   223   Klass* klass = java_lang_Class::as_Klass(javaMirror);

   224   return find_index(klass);

   225 }

   226 

   227 void AOTOopRecorder::record_meta_string(const char* name, int index) {

   228   assert(index > 0, "must be 1..n");

   229   index -= 1; // reduce by one to convert to array index

   230 

   231   if (index < _meta_strings->length()) {

   232     assert(strcmp(name, _meta_strings->at(index)) == 0, "must match");

   233   } else {

   234     assert(index == _meta_strings->length(), "must be last");

   235     _meta_strings->append(name);

   236   }

   237 }

   238 

   239 void* CodeInstaller::record_metadata_reference(CodeSection* section, address dest, Handle constant, TRAPS) {

   240   /*

   241    * This method needs to return a raw (untyped) pointer, since the value of a pointer to the base

   242    * class is in general not equal to the pointer of the subclass. When patching metaspace pointers,

   243    * the compiler expects a direct pointer to the subclass (Klass* or Method*), not a pointer to the

   244    * base class (Metadata* or MetaspaceObj*).

   245    */

   246   oop obj = HotSpotMetaspaceConstantImpl::metaspaceObject(constant);

   247   if (obj->is_a(HotSpotResolvedObjectTypeImpl::klass())) {

   248     Klass* klass = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(obj));

   249     assert(!HotSpotMetaspaceConstantImpl::compressed(constant), "unexpected compressed klass pointer %s @ " INTPTR_FORMAT, klass->name()->as_C_string(), p2i(klass));

   250     int index = _oop_recorder->find_index(klass);

   251     section->relocate(dest, metadata_Relocation::spec(index));

   252     TRACE_jvmci_3("metadata[%d of %d] = %s", index, _oop_recorder->metadata_count(), klass->name()->as_C_string());

   253     return klass;

   254   } else if (obj->is_a(HotSpotResolvedJavaMethodImpl::klass())) {

   255     Method* method = (Method*) (address) HotSpotResolvedJavaMethodImpl::metaspaceMethod(obj);

   256     assert(!HotSpotMetaspaceConstantImpl::compressed(constant), "unexpected compressed method pointer %s @ " INTPTR_FORMAT, method->name()->as_C_string(), p2i(method));

   257     int index = _oop_recorder->find_index(method);

   258     section->relocate(dest, metadata_Relocation::spec(index));

   259     TRACE_jvmci_3("metadata[%d of %d] = %s", index, _oop_recorder->metadata_count(), method->name()->as_C_string());

   260     return method;

   261   } else {

   262     JVMCI_ERROR_NULL("unexpected metadata reference for constant of type %s", obj->klass()->signature_name());

   263   }

   264 }

   265 

   266 #ifdef _LP64

   267 narrowKlass CodeInstaller::record_narrow_metadata_reference(CodeSection* section, address dest, Handle constant, TRAPS) {

   268   oop obj = HotSpotMetaspaceConstantImpl::metaspaceObject(constant);

   269   assert(HotSpotMetaspaceConstantImpl::compressed(constant), "unexpected uncompressed pointer");

   270 

   271   if (!obj->is_a(HotSpotResolvedObjectTypeImpl::klass())) {

   272     JVMCI_ERROR_0("unexpected compressed pointer of type %s", obj->klass()->signature_name());

   273   }

   274 

   275   Klass* klass = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(obj));

   276   int index = _oop_recorder->find_index(klass);

   277   section->relocate(dest, metadata_Relocation::spec(index));

   278   TRACE_jvmci_3("narrowKlass[%d of %d] = %s", index, _oop_recorder->metadata_count(), klass->name()->as_C_string());

   279   return Klass::encode_klass(klass);

   280 }

   281 #endif

   282 

   283 Location::Type CodeInstaller::get_oop_type(Thread* thread, Handle value) {

   284   Handle valueKind(thread, Value::valueKind(value));

   285   Handle platformKind(thread, ValueKind::platformKind(valueKind));

   286 

   287   if (platformKind == word_kind()) {

   288     return Location::oop;

   289   } else {

   290     return Location::narrowoop;

   291   }

   292 }

   293 

   294 ScopeValue* CodeInstaller::get_scope_value(Handle value, BasicType type, GrowableArray<ScopeValue*>* objects, ScopeValue* &second, TRAPS) {

   295   second = NULL;

   296   if (value.is_null()) {

   297     THROW_NULL(vmSymbols::java_lang_NullPointerException());

   298   } else if (value == Value::ILLEGAL()) {

   299     if (type != T_ILLEGAL) {

   300       JVMCI_ERROR_NULL("unexpected illegal value, expected %s", basictype_to_str(type));

   301     }

   302     return _illegal_value;

   303   } else if (value->is_a(RegisterValue::klass())) {

   304     Handle reg(THREAD, RegisterValue::reg(value));

   305     jint number = code_Register::number(reg);

   306     VMReg hotspotRegister = get_hotspot_reg(number, CHECK_NULL);

   307     if (is_general_purpose_reg(hotspotRegister)) {

   308       Location::Type locationType;

   309       if (type == T_OBJECT) {

   310         locationType = get_oop_type(THREAD, value);

   311       } else if (type == T_LONG) {

   312         locationType = Location::lng;

   313       } else if (type == T_INT || type == T_FLOAT || type == T_SHORT || type == T_CHAR || type == T_BYTE || type == T_BOOLEAN) {

   314         locationType = Location::int_in_long;

   315       } else {

   316         JVMCI_ERROR_NULL("unexpected type %s in cpu register", basictype_to_str(type));

   317       }

   318       ScopeValue* value = new LocationValue(Location::new_reg_loc(locationType, hotspotRegister));

   319       if (type == T_LONG) {

   320         second = value;

   321       }

   322       return value;

   323     } else {

   324       Location::Type locationType;

   325       if (type == T_FLOAT) {

   326         // this seems weird, but the same value is used in c1_LinearScan

   327         locationType = Location::normal;

   328       } else if (type == T_DOUBLE) {

   329         locationType = Location::dbl;

   330       } else {

   331         JVMCI_ERROR_NULL("unexpected type %s in floating point register", basictype_to_str(type));

   332       }

   333       ScopeValue* value = new LocationValue(Location::new_reg_loc(locationType, hotspotRegister));

   334       if (type == T_DOUBLE) {

   335         second = value;

   336       }

   337       return value;

   338     }

   339   } else if (value->is_a(StackSlot::klass())) {

   340     jint offset = StackSlot::offset(value);

   341     if (StackSlot::addFrameSize(value)) {

   342       offset += _total_frame_size;

   343     }

   344 

   345     Location::Type locationType;

   346     if (type == T_OBJECT) {

   347       locationType = get_oop_type(THREAD, value);

   348     } else if (type == T_LONG) {

   349       locationType = Location::lng;

   350     } else if (type == T_DOUBLE) {

   351       locationType = Location::dbl;

   352     } else if (type == T_INT || type == T_FLOAT || type == T_SHORT || type == T_CHAR || type == T_BYTE || type == T_BOOLEAN) {

   353       locationType = Location::normal;

   354     } else {

   355       JVMCI_ERROR_NULL("unexpected type %s in stack slot", basictype_to_str(type));

   356     }

   357     ScopeValue* value = new LocationValue(Location::new_stk_loc(locationType, offset));

   358     if (type == T_DOUBLE || type == T_LONG) {

   359       second = value;

   360     }

   361     return value;

   362   } else if (value->is_a(JavaConstant::klass())) {

   363     if (value->is_a(PrimitiveConstant::klass())) {

   364       if (value->is_a(RawConstant::klass())) {

   365         jlong prim = PrimitiveConstant::primitive(value);

   366         return new ConstantLongValue(prim);

   367       } else {

   368         Handle primitive_constant_kind(THREAD, PrimitiveConstant::kind(value));

   369         BasicType constantType = JVMCIRuntime::kindToBasicType(primitive_constant_kind, CHECK_NULL);

   370         if (type != constantType) {

   371           JVMCI_ERROR_NULL("primitive constant type doesn't match, expected %s but got %s", basictype_to_str(type), basictype_to_str(constantType));

   372         }

   373         if (type == T_INT || type == T_FLOAT) {

   374           jint prim = (jint)PrimitiveConstant::primitive(value);

   375           switch (prim) {

   376             case -1: return _int_m1_scope_value;

   377             case  0: return _int_0_scope_value;

   378             case  1: return _int_1_scope_value;

   379             case  2: return _int_2_scope_value;

   380             default: return new ConstantIntValue(prim);

   381           }

   382         } else if (type == T_LONG || type == T_DOUBLE) {

   383           jlong prim = PrimitiveConstant::primitive(value);

   384           second = _int_1_scope_value;

   385           return new ConstantLongValue(prim);

   386         } else {

   387           JVMCI_ERROR_NULL("unexpected primitive constant type %s", basictype_to_str(type));

   388         }

   389       }

   390     } else if (value->is_a(NullConstant::klass()) || value->is_a(HotSpotCompressedNullConstant::klass())) {

   391       if (type == T_OBJECT) {

   392         return _oop_null_scope_value;

   393       } else {

   394         JVMCI_ERROR_NULL("unexpected null constant, expected %s", basictype_to_str(type));

   395       }

   396     } else if (value->is_a(HotSpotObjectConstantImpl::klass())) {

   397       if (type == T_OBJECT) {

   398         oop obj = HotSpotObjectConstantImpl::object(value);

   399         if (obj == NULL) {

   400           JVMCI_ERROR_NULL("null value must be in NullConstant");

   401         }

   402         return new ConstantOopWriteValue(JNIHandles::make_local(obj));

   403       } else {

   404         JVMCI_ERROR_NULL("unexpected object constant, expected %s", basictype_to_str(type));

   405       }

   406     }

   407   } else if (value->is_a(VirtualObject::klass())) {

   408     if (type == T_OBJECT) {

   409       int id = VirtualObject::id(value);

   410       if (0 <= id && id < objects->length()) {

   411         ScopeValue* object = objects->at(id);

   412         if (object != NULL) {

   413           return object;

   414         }

   415       }

   416       JVMCI_ERROR_NULL("unknown virtual object id %d", id);

   417     } else {

   418       JVMCI_ERROR_NULL("unexpected virtual object, expected %s", basictype_to_str(type));

   419     }

   420   }

   421 

   422   JVMCI_ERROR_NULL("unexpected value in scope: %s", value->klass()->signature_name())

   423 }

   424 

   425 void CodeInstaller::record_object_value(ObjectValue* sv, Handle value, GrowableArray<ScopeValue*>* objects, TRAPS) {

   426   // Might want a HandleMark here.

   427   Handle type(THREAD, VirtualObject::type(value));

   428   int id = VirtualObject::id(value);

   429   oop javaMirror = HotSpotResolvedObjectTypeImpl::javaClass(type);

   430   Klass* klass = java_lang_Class::as_Klass(javaMirror);

   431   bool isLongArray = klass == Universe::longArrayKlassObj();

   432 

   433   objArrayHandle values(THREAD, VirtualObject::values(value));

   434   objArrayHandle slotKinds(THREAD, VirtualObject::slotKinds(value));

   435   for (jint i = 0; i < values->length(); i++) {

   436     HandleMark hm(THREAD);

   437     ScopeValue* cur_second = NULL;

   438     Handle object(THREAD, values->obj_at(i));

   439     Handle slot_kind (THREAD, slotKinds->obj_at(i));

   440     BasicType type = JVMCIRuntime::kindToBasicType(slot_kind, CHECK);

   441     ScopeValue* value = get_scope_value(object, type, objects, cur_second, CHECK);

   442 

   443     if (isLongArray && cur_second == NULL) {

   444       // we're trying to put ints into a long array... this isn't really valid, but it's used for some optimizations.

   445       // add an int 0 constant

   446       cur_second = _int_0_scope_value;

   447     }

   448 

   449     if (cur_second != NULL) {

   450       sv->field_values()->append(cur_second);

   451     }

   452     assert(value != NULL, "missing value");

   453     sv->field_values()->append(value);

   454   }

   455 }

   456 

   457 MonitorValue* CodeInstaller::get_monitor_value(Handle value, GrowableArray<ScopeValue*>* objects, TRAPS) {

   458   if (value.is_null()) {

   459     THROW_NULL(vmSymbols::java_lang_NullPointerException());

   460   }

   461   if (!value->is_a(StackLockValue::klass())) {

   462     JVMCI_ERROR_NULL("Monitors must be of type StackLockValue, got %s", value->klass()->signature_name());

   463   }

   464 

   465   ScopeValue* second = NULL;

   466   Handle stack_lock_owner(THREAD, StackLockValue::owner(value));

   467   ScopeValue* owner_value = get_scope_value(stack_lock_owner, T_OBJECT, objects, second, CHECK_NULL);

   468   assert(second == NULL, "monitor cannot occupy two stack slots");

   469 

   470   Handle stack_lock_slot(THREAD, StackLockValue::slot(value));

   471   ScopeValue* lock_data_value = get_scope_value(stack_lock_slot, T_LONG, objects, second, CHECK_NULL);

   472   assert(second == lock_data_value, "monitor is LONG value that occupies two stack slots");

   473   assert(lock_data_value->is_location(), "invalid monitor location");

   474   Location lock_data_loc = ((LocationValue*)lock_data_value)->location();

   475 

   476   bool eliminated = false;

   477   if (StackLockValue::eliminated(value)) {

   478     eliminated = true;

   479   }

   480 

   481   return new MonitorValue(owner_value, lock_data_loc, eliminated);

   482 }

   483 

   484 void CodeInstaller::initialize_dependencies(oop compiled_code, OopRecorder* recorder, TRAPS) {

   485   JavaThread* thread = JavaThread::current();

   486   assert(THREAD == thread, "");

   487   CompilerThread* compilerThread = thread->is_Compiler_thread() ? thread->as_CompilerThread() : NULL;

   488   _oop_recorder = recorder;

   489   _dependencies = new Dependencies(&_arena, _oop_recorder, compilerThread != NULL ? compilerThread->log() : NULL);

   490   objArrayHandle assumptions(THREAD, HotSpotCompiledCode::assumptions(compiled_code));

   491   if (!assumptions.is_null()) {

   492     int length = assumptions->length();

   493     for (int i = 0; i < length; ++i) {

   494       Handle assumption(THREAD, assumptions->obj_at(i));

   495       if (!assumption.is_null()) {

   496         if (assumption->klass() == Assumptions_NoFinalizableSubclass::klass()) {

   497           assumption_NoFinalizableSubclass(THREAD, assumption);

   498         } else if (assumption->klass() == Assumptions_ConcreteSubtype::klass()) {

   499           assumption_ConcreteSubtype(THREAD, assumption);

   500         } else if (assumption->klass() == Assumptions_LeafType::klass()) {

   501           assumption_LeafType(THREAD, assumption);

   502         } else if (assumption->klass() == Assumptions_ConcreteMethod::klass()) {

   503           assumption_ConcreteMethod(THREAD, assumption);

   504         } else if (assumption->klass() == Assumptions_CallSiteTargetValue::klass()) {

   505           assumption_CallSiteTargetValue(THREAD, assumption);

   506         } else {

   507           JVMCI_ERROR("unexpected Assumption subclass %s", assumption->klass()->signature_name());

   508         }

   509       }

   510     }

   511   }

   512   if (JvmtiExport::can_hotswap_or_post_breakpoint()) {

   513     objArrayHandle methods(THREAD, HotSpotCompiledCode::methods(compiled_code));

   514     if (!methods.is_null()) {

   515       int length = methods->length();

   516       for (int i = 0; i < length; ++i) {

   517         Handle method_handle(THREAD, methods->obj_at(i));

   518         methodHandle method = getMethodFromHotSpotMethod(method_handle());

   519         _dependencies->assert_evol_method(method());

   520       }

   521     }

   522   }

   523 }

   524 

   525 RelocBuffer::~RelocBuffer() {

   526   if (_buffer != NULL) {

   527     FREE_C_HEAP_ARRAY(char, _buffer);

   528   }

   529 }

   530 

   531 address RelocBuffer::begin() const {

   532   if (_buffer != NULL) {

   533     return (address) _buffer;

   534   }

   535   return (address) _static_buffer;

   536 }

   537 

   538 void RelocBuffer::set_size(size_t bytes) {

   539   assert(bytes <= _size, "can't grow in size!");

   540   _size = bytes;

   541 }

   542 

   543 void RelocBuffer::ensure_size(size_t bytes) {

   544   assert(_buffer == NULL, "can only be used once");

   545   assert(_size == 0, "can only be used once");

   546   if (bytes >= RelocBuffer::stack_size) {

   547     _buffer = NEW_C_HEAP_ARRAY(char, bytes, mtInternal);

   548   }

   549   _size = bytes;

   550 }

   551 

   552 JVMCIEnv::CodeInstallResult CodeInstaller::gather_metadata(Handle target, Handle compiled_code, CodeMetadata& metadata, TRAPS) {

   553   CodeBuffer buffer("JVMCI Compiler CodeBuffer for Metadata");

   554   jobject compiled_code_obj = JNIHandles::make_local(compiled_code());

   555   AOTOopRecorder* recorder = new AOTOopRecorder(&_arena, true);

   556   initialize_dependencies(JNIHandles::resolve(compiled_code_obj), recorder, CHECK_OK);

   557 

   558   metadata.set_oop_recorder(recorder);

   559 

   560   // Get instructions and constants CodeSections early because we need it.

   561   _instructions = buffer.insts();

   562   _constants = buffer.consts();

   563 

   564   initialize_fields(target(), JNIHandles::resolve(compiled_code_obj), CHECK_OK);

   565   JVMCIEnv::CodeInstallResult result = initialize_buffer(buffer, false, CHECK_OK);

   566   if (result != JVMCIEnv::ok) {

   567     return result;

   568   }

   569 

   570   _debug_recorder->pcs_size(); // create the sentinel record

   571 

   572   assert(_debug_recorder->pcs_length() >= 2, "must be at least 2");

   573 

   574   metadata.set_pc_desc(_debug_recorder->pcs(), _debug_recorder->pcs_length());

   575   metadata.set_scopes(_debug_recorder->stream()->buffer(), _debug_recorder->data_size());

   576   metadata.set_exception_table(&_exception_handler_table);

   577 

   578   RelocBuffer* reloc_buffer = metadata.get_reloc_buffer();

   579 

   580   reloc_buffer->ensure_size(buffer.total_relocation_size());

   581   size_t size = (size_t) buffer.copy_relocations_to(reloc_buffer->begin(), (CodeBuffer::csize_t) reloc_buffer->size(), true);

   582   reloc_buffer->set_size(size);

   583   return JVMCIEnv::ok;

   584 }

   585 

   586 // constructor used to create a method

   587 JVMCIEnv::CodeInstallResult CodeInstaller::install(JVMCICompiler* compiler, Handle target, Handle compiled_code, CodeBlob*& cb, Handle installed_code, Handle speculation_log, TRAPS) {

   588   CodeBuffer buffer("JVMCI Compiler CodeBuffer");

   589   jobject compiled_code_obj = JNIHandles::make_local(compiled_code());

   590   OopRecorder* recorder = new OopRecorder(&_arena, true);

   591   initialize_dependencies(JNIHandles::resolve(compiled_code_obj), recorder, CHECK_OK);

   592 

   593   // Get instructions and constants CodeSections early because we need it.

   594   _instructions = buffer.insts();

   595   _constants = buffer.consts();

   596 

   597   initialize_fields(target(), JNIHandles::resolve(compiled_code_obj), CHECK_OK);

   598   JVMCIEnv::CodeInstallResult result = initialize_buffer(buffer, true, CHECK_OK);

   599   if (result != JVMCIEnv::ok) {

   600     return result;

   601   }

   602 

   603   int stack_slots = _total_frame_size / HeapWordSize; // conversion to words

   604 

   605   if (!compiled_code->is_a(HotSpotCompiledNmethod::klass())) {

   606     oop stubName = HotSpotCompiledCode::name(compiled_code_obj);

   607     char* name = strdup(java_lang_String::as_utf8_string(stubName));

   608     cb = RuntimeStub::new_runtime_stub(name,

   609                                        &buffer,

   610                                        CodeOffsets::frame_never_safe,

   611                                        stack_slots,

   612                                        _debug_recorder->_oopmaps,

   613                                        false);

   614     result = JVMCIEnv::ok;

   615   } else {

   616     nmethod* nm = NULL;

   617     methodHandle method = getMethodFromHotSpotMethod(HotSpotCompiledNmethod::method(compiled_code));

   618     jint entry_bci = HotSpotCompiledNmethod::entryBCI(compiled_code);

   619     jint id = HotSpotCompiledNmethod::id(compiled_code);

   620     bool has_unsafe_access = HotSpotCompiledNmethod::hasUnsafeAccess(compiled_code) == JNI_TRUE;

   621     JVMCIEnv* env = (JVMCIEnv*) (address) HotSpotCompiledNmethod::jvmciEnv(compiled_code);

   622     if (id == -1) {

   623       // Make sure a valid compile_id is associated with every compile

   624       id = CompileBroker::assign_compile_id_unlocked(Thread::current(), method, entry_bci);

   625     }

   626     result = JVMCIEnv::register_method(method, nm, entry_bci, &_offsets, _orig_pc_offset, &buffer,

   627                                        stack_slots, _debug_recorder->_oopmaps, &_exception_handler_table,

   628                                        compiler, _debug_recorder, _dependencies, env, id,

   629                                        has_unsafe_access, _has_wide_vector, installed_code, compiled_code, speculation_log);

   630     cb = nm->as_codeblob_or_null();

   631     if (nm != NULL && env == NULL) {

   632       DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, compiler);

   633       bool printnmethods = directive->PrintAssemblyOption || directive->PrintNMethodsOption;

   634       if (!printnmethods && (PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers)) {

   635         nm->print_nmethod(printnmethods);

   636       }

   637       DirectivesStack::release(directive);

   638     }

   639   }

   640 

   641   if (cb != NULL) {

   642     // Make sure the pre-calculated constants section size was correct.

   643     guarantee((cb->code_begin() - cb->content_begin()) >= _constants_size, "%d < %d", (int)(cb->code_begin() - cb->content_begin()), _constants_size);

   644   }

   645   return result;

   646 }

   647 

   648 void CodeInstaller::initialize_fields(oop target, oop compiled_code, TRAPS) {

   649   if (compiled_code->is_a(HotSpotCompiledNmethod::klass())) {

   650     Handle hotspotJavaMethod(THREAD, HotSpotCompiledNmethod::method(compiled_code));

   651     methodHandle method = getMethodFromHotSpotMethod(hotspotJavaMethod());

   652     _parameter_count = method->size_of_parameters();

   653     TRACE_jvmci_2("installing code for %s", method->name_and_sig_as_C_string());

   654   } else {

   655     // Must be a HotSpotCompiledRuntimeStub.

   656     // Only used in OopMap constructor for non-product builds

   657     _parameter_count = 0;

   658   }

   659   _sites_handle = JNIHandles::make_local(HotSpotCompiledCode::sites(compiled_code));

   660 

   661   _code_handle = JNIHandles::make_local(HotSpotCompiledCode::targetCode(compiled_code));

   662   _code_size = HotSpotCompiledCode::targetCodeSize(compiled_code);

   663   _total_frame_size = HotSpotCompiledCode::totalFrameSize(compiled_code);

   664 

   665   oop deoptRescueSlot = HotSpotCompiledCode::deoptRescueSlot(compiled_code);

   666   if (deoptRescueSlot == NULL) {

   667     _orig_pc_offset = -1;

   668   } else {

   669     _orig_pc_offset = StackSlot::offset(deoptRescueSlot);

   670     if (StackSlot::addFrameSize(deoptRescueSlot)) {

   671       _orig_pc_offset += _total_frame_size;

   672     }

   673     if (_orig_pc_offset < 0) {

   674       JVMCI_ERROR("invalid deopt rescue slot: %d", _orig_pc_offset);

   675     }

   676   }

   677 

   678   // Pre-calculate the constants section size.  This is required for PC-relative addressing.

   679   _data_section_handle = JNIHandles::make_local(HotSpotCompiledCode::dataSection(compiled_code));

   680   if ((_constants->alignment() % HotSpotCompiledCode::dataSectionAlignment(compiled_code)) != 0) {

   681     JVMCI_ERROR("invalid data section alignment: %d", HotSpotCompiledCode::dataSectionAlignment(compiled_code));

   682   }

   683   _constants_size = data_section()->length();

   684 

   685   _data_section_patches_handle = JNIHandles::make_local(HotSpotCompiledCode::dataSectionPatches(compiled_code));

   686 

   687 #ifndef PRODUCT

   688   _comments_handle = JNIHandles::make_local(HotSpotCompiledCode::comments(compiled_code));

   689 #endif

   690 

   691   _next_call_type = INVOKE_INVALID;

   692 

   693   _has_wide_vector = false;

   694 

   695   oop arch = TargetDescription::arch(target);

   696   _word_kind_handle = JNIHandles::make_local(Architecture::wordKind(arch));

   697 }

   698 

   699 int CodeInstaller::estimate_stubs_size(TRAPS) {

   700   // Estimate the number of static and aot call stubs that might be emitted.

   701   int static_call_stubs = 0;

   702   int aot_call_stubs = 0;

   703   objArrayOop sites = this->sites();

   704   for (int i = 0; i < sites->length(); i++) {

   705     oop site = sites->obj_at(i);

   706     if (site != NULL) {

   707       if (site->is_a(site_Mark::klass())) {

   708         oop id_obj = site_Mark::id(site);

   709         if (id_obj != NULL) {

   710           if (!java_lang_boxing_object::is_instance(id_obj, T_INT)) {

   711             JVMCI_ERROR_0("expected Integer id, got %s", id_obj->klass()->signature_name());

   712           }

   713           jint id = id_obj->int_field(java_lang_boxing_object::value_offset_in_bytes(T_INT));

   714           if (id == INVOKESTATIC || id == INVOKESPECIAL) {

   715             static_call_stubs++;

   716           }

   717         }

   718       }

   719       if (UseAOT && site->is_a(site_Call::klass())) {

   720         oop target = site_Call::target(site);

   721         InstanceKlass* target_klass = InstanceKlass::cast(target->klass());

   722         if (!target_klass->is_subclass_of(SystemDictionary::HotSpotForeignCallTarget_klass())) {

   723           // Add far aot trampolines.

   724           aot_call_stubs++;

   725         }

   726       }

   727     }

   728   }

   729   int size = static_call_stubs * CompiledStaticCall::to_interp_stub_size();

   730 #if INCLUDE_AOT

   731   size += aot_call_stubs * CompiledStaticCall::to_aot_stub_size();

   732 #endif

   733   return size;

   734 }

   735 

   736 // perform data and call relocation on the CodeBuffer

   737 JVMCIEnv::CodeInstallResult CodeInstaller::initialize_buffer(CodeBuffer& buffer, bool check_size, TRAPS) {

   738   HandleMark hm;

   739   objArrayHandle sites(THREAD, this->sites());

   740   int locs_buffer_size = sites->length() * (relocInfo::length_limit + sizeof(relocInfo));

   741 

   742   // Allocate enough space in the stub section for the static call

   743   // stubs.  Stubs have extra relocs but they are managed by the stub

   744   // section itself so they don't need to be accounted for in the

   745   // locs_buffer above.

   746   int stubs_size = estimate_stubs_size(CHECK_OK);

   747   int total_size = align_up(_code_size, buffer.insts()->alignment()) + align_up(_constants_size, buffer.consts()->alignment()) + align_up(stubs_size, buffer.stubs()->alignment());

   748 

   749   if (check_size && total_size > JVMCINMethodSizeLimit) {

   750     return JVMCIEnv::code_too_large;

   751   }

   752 

   753   buffer.initialize(total_size, locs_buffer_size);

   754   if (buffer.blob() == NULL) {

   755     return JVMCIEnv::cache_full;

   756   }

   757   buffer.initialize_stubs_size(stubs_size);

   758   buffer.initialize_consts_size(_constants_size);

   759 

   760   _debug_recorder = new DebugInformationRecorder(_oop_recorder);

   761   _debug_recorder->set_oopmaps(new OopMapSet());

   762 

   763   buffer.initialize_oop_recorder(_oop_recorder);

   764 

   765   // copy the constant data into the newly created CodeBuffer

   766   address end_data = _constants->start() + _constants_size;

   767   memcpy(_constants->start(), data_section()->base(T_BYTE), _constants_size);

   768   _constants->set_end(end_data);

   769 

   770   // copy the code into the newly created CodeBuffer

   771   address end_pc = _instructions->start() + _code_size;

   772   guarantee(_instructions->allocates2(end_pc), "initialize should have reserved enough space for all the code");

   773   memcpy(_instructions->start(), code()->base(T_BYTE), _code_size);

   774   _instructions->set_end(end_pc);

   775 

   776   for (int i = 0; i < data_section_patches()->length(); i++) {

   777     HandleMark hm(THREAD);

   778     Handle patch(THREAD, data_section_patches()->obj_at(i));

   779     if (patch.is_null()) {

   780       THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);

   781     }

   782     Handle reference(THREAD, site_DataPatch::reference(patch));

   783     if (reference.is_null()) {

   784       THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);

   785     }

   786     if (!reference->is_a(site_ConstantReference::klass())) {

   787       JVMCI_ERROR_OK("invalid patch in data section: %s", reference->klass()->signature_name());

   788     }

   789     Handle constant(THREAD, site_ConstantReference::constant(reference));

   790     if (constant.is_null()) {

   791       THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);

   792     }

   793     address dest = _constants->start() + site_Site::pcOffset(patch);

   794     if (constant->is_a(HotSpotMetaspaceConstantImpl::klass())) {

   795       if (HotSpotMetaspaceConstantImpl::compressed(constant)) {

   796 #ifdef _LP64

   797         *((narrowKlass*) dest) = record_narrow_metadata_reference(_constants, dest, constant, CHECK_OK);

   798 #else

   799         JVMCI_ERROR_OK("unexpected compressed Klass* in 32-bit mode");

   800 #endif

   801       } else {

   802         *((void**) dest) = record_metadata_reference(_constants, dest, constant, CHECK_OK);

   803       }

   804     } else if (constant->is_a(HotSpotObjectConstantImpl::klass())) {

   805       Handle obj(THREAD, HotSpotObjectConstantImpl::object(constant));

   806       jobject value = JNIHandles::make_local(obj());

   807       int oop_index = _oop_recorder->find_index(value);

   808 

   809       if (HotSpotObjectConstantImpl::compressed(constant)) {

   810 #ifdef _LP64

   811         _constants->relocate(dest, oop_Relocation::spec(oop_index), relocInfo::narrow_oop_in_const);

   812 #else

   813         JVMCI_ERROR_OK("unexpected compressed oop in 32-bit mode");

   814 #endif

   815       } else {

   816         _constants->relocate(dest, oop_Relocation::spec(oop_index));

   817       }

   818     } else {

   819       JVMCI_ERROR_OK("invalid constant in data section: %s", constant->klass()->signature_name());

   820     }

   821   }

   822   jint last_pc_offset = -1;

   823   for (int i = 0; i < sites->length(); i++) {

   824     HandleMark hm(THREAD);

   825     Handle site(THREAD, sites->obj_at(i));

   826     if (site.is_null()) {

   827       THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);

   828     }

   829 

   830     jint pc_offset = site_Site::pcOffset(site);

   831 

   832     if (site->is_a(site_Call::klass())) {

   833       TRACE_jvmci_4("call at %i", pc_offset);

   834       site_Call(buffer, pc_offset, site, CHECK_OK);

   835     } else if (site->is_a(site_Infopoint::klass())) {

   836       // three reasons for infopoints denote actual safepoints

   837       oop reason = site_Infopoint::reason(site);

   838       if (site_InfopointReason::SAFEPOINT() == reason || site_InfopointReason::CALL() == reason || site_InfopointReason::IMPLICIT_EXCEPTION() == reason) {

   839         TRACE_jvmci_4("safepoint at %i", pc_offset);

   840         site_Safepoint(buffer, pc_offset, site, CHECK_OK);

   841         if (_orig_pc_offset < 0) {

   842           JVMCI_ERROR_OK("method contains safepoint, but has no deopt rescue slot");

   843         }

   844       } else {

   845         TRACE_jvmci_4("infopoint at %i", pc_offset);

   846         site_Infopoint(buffer, pc_offset, site, CHECK_OK);

   847       }

   848     } else if (site->is_a(site_DataPatch::klass())) {

   849       TRACE_jvmci_4("datapatch at %i", pc_offset);

   850       site_DataPatch(buffer, pc_offset, site, CHECK_OK);

   851     } else if (site->is_a(site_Mark::klass())) {

   852       TRACE_jvmci_4("mark at %i", pc_offset);

   853       site_Mark(buffer, pc_offset, site, CHECK_OK);

   854     } else if (site->is_a(site_ExceptionHandler::klass())) {

   855       TRACE_jvmci_4("exceptionhandler at %i", pc_offset);

   856       site_ExceptionHandler(pc_offset, site);

   857     } else {

   858       JVMCI_ERROR_OK("unexpected site subclass: %s", site->klass()->signature_name());

   859     }

   860     last_pc_offset = pc_offset;

   861 

   862     if (SafepointSynchronize::do_call_back()) {

   863       // this is a hacky way to force a safepoint check but nothing else was jumping out at me.

   864       ThreadToNativeFromVM ttnfv(JavaThread::current());

   865     }

   866   }

   867 

   868 #ifndef PRODUCT

   869   if (comments() != NULL) {

   870     for (int i = 0; i < comments()->length(); i++) {

   871       oop comment = comments()->obj_at(i);

   872       assert(comment->is_a(HotSpotCompiledCode_Comment::klass()), "cce");

   873       jint offset = HotSpotCompiledCode_Comment::pcOffset(comment);

   874       char* text = java_lang_String::as_utf8_string(HotSpotCompiledCode_Comment::text(comment));

   875       buffer.block_comment(offset, text);

   876     }

   877   }

   878 #endif

   879   return JVMCIEnv::ok;

   880 }

   881 

   882 void CodeInstaller::assumption_NoFinalizableSubclass(Thread* thread, Handle assumption) {

   883   Handle receiverType_handle (thread, Assumptions_NoFinalizableSubclass::receiverType(assumption()));

   884   Klass* receiverType = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(receiverType_handle));

   885   _dependencies->assert_has_no_finalizable_subclasses(receiverType);

   886 }

   887 

   888 void CodeInstaller::assumption_ConcreteSubtype(Thread* thread, Handle assumption) {

   889   Handle context_handle (thread, Assumptions_ConcreteSubtype::context(assumption()));

   890   Handle subtype_handle (thread, Assumptions_ConcreteSubtype::subtype(assumption()));

   891   Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));

   892   Klass* subtype = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(subtype_handle));

   893 

   894   assert(context->is_abstract(), "");

   895   _dependencies->assert_abstract_with_unique_concrete_subtype(context, subtype);

   896 }

   897 

   898 void CodeInstaller::assumption_LeafType(Thread* thread, Handle assumption) {

   899   Handle context_handle (thread, Assumptions_LeafType::context(assumption()));

   900   Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));

   901 

   902   _dependencies->assert_leaf_type(context);

   903 }

   904 

   905 void CodeInstaller::assumption_ConcreteMethod(Thread* thread, Handle assumption) {

   906   Handle impl_handle (thread, Assumptions_ConcreteMethod::impl(assumption()));

   907   Handle context_handle (thread, Assumptions_ConcreteMethod::context(assumption()));

   908 

   909   methodHandle impl = getMethodFromHotSpotMethod(impl_handle());

   910   Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));

   911 

   912   _dependencies->assert_unique_concrete_method(context, impl());

   913 }

   914 

   915 void CodeInstaller::assumption_CallSiteTargetValue(Thread* thread, Handle assumption) {

   916   Handle callSite(thread, Assumptions_CallSiteTargetValue::callSite(assumption()));

   917   Handle methodHandle(thread, Assumptions_CallSiteTargetValue::methodHandle(assumption()));

   918 

   919   _dependencies->assert_call_site_target_value(callSite(), methodHandle());

   920 }

   921 

   922 void CodeInstaller::site_ExceptionHandler(jint pc_offset, Handle exc) {

   923   jint handler_offset = site_ExceptionHandler::handlerPos(exc);

   924 

   925   // Subtable header

   926   _exception_handler_table.add_entry(HandlerTableEntry(1, pc_offset, 0));

   927 

   928   // Subtable entry

   929   _exception_handler_table.add_entry(HandlerTableEntry(-1, handler_offset, 0));

   930 }

   931 

   932 // If deoptimization happens, the interpreter should reexecute these bytecodes.

   933 // This function mainly helps the compilers to set up the reexecute bit.

   934 static bool bytecode_should_reexecute(Bytecodes::Code code) {

   935   switch (code) {

   936     case Bytecodes::_invokedynamic:

   937     case Bytecodes::_invokevirtual:

   938     case Bytecodes::_invokeinterface:

   939     case Bytecodes::_invokespecial:

   940     case Bytecodes::_invokestatic:

   941       return false;

   942     default:

   943       return true;

   944     }

   945   return true;

   946 }

   947 

   948 GrowableArray<ScopeValue*>* CodeInstaller::record_virtual_objects(Handle debug_info, TRAPS) {

   949   objArrayHandle virtualObjects(THREAD, DebugInfo::virtualObjectMapping(debug_info));

   950   if (virtualObjects.is_null()) {

   951     return NULL;

   952   }

   953   GrowableArray<ScopeValue*>* objects = new GrowableArray<ScopeValue*>(virtualObjects->length(), virtualObjects->length(), NULL);

   954   // Create the unique ObjectValues

   955   for (int i = 0; i < virtualObjects->length(); i++) {

   956     HandleMark hm(THREAD);

   957     Handle value(THREAD, virtualObjects->obj_at(i));

   958     int id = VirtualObject::id(value);

   959     Handle type(THREAD, VirtualObject::type(value));

   960     oop javaMirror = HotSpotResolvedObjectTypeImpl::javaClass(type);

   961     ObjectValue* sv = new ObjectValue(id, new ConstantOopWriteValue(JNIHandles::make_local(Thread::current(), javaMirror)));

   962     if (id < 0 || id >= objects->length()) {

   963       JVMCI_ERROR_NULL("virtual object id %d out of bounds", id);

   964     }

   965     if (objects->at(id) != NULL) {

   966       JVMCI_ERROR_NULL("duplicate virtual object id %d", id);

   967     }

   968     objects->at_put(id, sv);

   969   }

   970   // All the values which could be referenced by the VirtualObjects

   971   // exist, so now describe all the VirtualObjects themselves.

   972   for (int i = 0; i < virtualObjects->length(); i++) {

   973     HandleMark hm(THREAD);

   974     Handle value(THREAD, virtualObjects->obj_at(i));

   975     int id = VirtualObject::id(value);

   976     record_object_value(objects->at(id)->as_ObjectValue(), value, objects, CHECK_NULL);

   977   }

   978   _debug_recorder->dump_object_pool(objects);

   979   return objects;

   980 }

   981 

   982 void CodeInstaller::record_scope(jint pc_offset, Handle debug_info, ScopeMode scope_mode, bool return_oop, TRAPS) {

   983   Handle position(THREAD, DebugInfo::bytecodePosition(debug_info));

   984   if (position.is_null()) {

   985     // Stubs do not record scope info, just oop maps

   986     return;

   987   }

   988 

   989   GrowableArray<ScopeValue*>* objectMapping;

   990   if (scope_mode == CodeInstaller::FullFrame) {

   991     objectMapping = record_virtual_objects(debug_info, CHECK);

   992   } else {

   993     objectMapping = NULL;

   994   }

   995   record_scope(pc_offset, position, scope_mode, objectMapping, return_oop, CHECK);

   996 }

   997 

   998 void CodeInstaller::record_scope(jint pc_offset, Handle position, ScopeMode scope_mode, GrowableArray<ScopeValue*>* objects, bool return_oop, TRAPS) {

   999   Handle frame;

  1000   if (scope_mode == CodeInstaller::FullFrame) {

  1001     if (!position->is_a(BytecodeFrame::klass())) {

  1002       JVMCI_ERROR("Full frame expected for debug info at %i", pc_offset);

  1003     }

  1004     frame = position;

  1005   }

  1006   Handle caller_frame (THREAD, BytecodePosition::caller(position));

  1007   if (caller_frame.not_null()) {

  1008     record_scope(pc_offset, caller_frame, scope_mode, objects, return_oop, CHECK);

  1009   }

  1010 

  1011   Handle hotspot_method (THREAD, BytecodePosition::method(position));

  1012   Method* method = getMethodFromHotSpotMethod(hotspot_method());

  1013   jint bci = BytecodePosition::bci(position);

  1014   if (bci == BytecodeFrame::BEFORE_BCI()) {

  1015     bci = SynchronizationEntryBCI;

  1016   }

  1017 

  1018   TRACE_jvmci_2("Recording scope pc_offset=%d bci=%d method=%s", pc_offset, bci, method->name_and_sig_as_C_string());

  1019 

  1020   bool reexecute = false;

  1021   if (frame.not_null()) {

  1022     if (bci == SynchronizationEntryBCI){

  1023        reexecute = false;

  1024     } else {

  1025       Bytecodes::Code code = Bytecodes::java_code_at(method, method->bcp_from(bci));

  1026       reexecute = bytecode_should_reexecute(code);

  1027       if (frame.not_null()) {

  1028         reexecute = (BytecodeFrame::duringCall(frame) == JNI_FALSE);

  1029       }

  1030     }

  1031   }

  1032 

  1033   DebugToken* locals_token = NULL;

  1034   DebugToken* expressions_token = NULL;

  1035   DebugToken* monitors_token = NULL;

  1036   bool throw_exception = false;

  1037 

  1038   if (frame.not_null()) {

  1039     jint local_count = BytecodeFrame::numLocals(frame);

  1040     jint expression_count = BytecodeFrame::numStack(frame);

  1041     jint monitor_count = BytecodeFrame::numLocks(frame);

  1042     objArrayHandle values(THREAD, BytecodeFrame::values(frame));

  1043     objArrayHandle slotKinds(THREAD, BytecodeFrame::slotKinds(frame));

  1044 

  1045     if (values.is_null() || slotKinds.is_null()) {

  1046       THROW(vmSymbols::java_lang_NullPointerException());

  1047     }

  1048     if (local_count + expression_count + monitor_count != values->length()) {

  1049       JVMCI_ERROR("unexpected values length %d in scope (%d locals, %d expressions, %d monitors)", values->length(), local_count, expression_count, monitor_count);

  1050     }

  1051     if (local_count + expression_count != slotKinds->length()) {

  1052       JVMCI_ERROR("unexpected slotKinds length %d in scope (%d locals, %d expressions)", slotKinds->length(), local_count, expression_count);

  1053     }

  1054 

  1055     GrowableArray<ScopeValue*>* locals = local_count > 0 ? new GrowableArray<ScopeValue*> (local_count) : NULL;

  1056     GrowableArray<ScopeValue*>* expressions = expression_count > 0 ? new GrowableArray<ScopeValue*> (expression_count) : NULL;

  1057     GrowableArray<MonitorValue*>* monitors = monitor_count > 0 ? new GrowableArray<MonitorValue*> (monitor_count) : NULL;

  1058 

  1059     TRACE_jvmci_2("Scope at bci %d with %d values", bci, values->length());

  1060     TRACE_jvmci_2("%d locals %d expressions, %d monitors", local_count, expression_count, monitor_count);

  1061 

  1062     for (jint i = 0; i < values->length(); i++) {

  1063       HandleMark hm(THREAD);

  1064       ScopeValue* second = NULL;

  1065       Handle value(THREAD, values->obj_at(i));

  1066       if (i < local_count) {

  1067         BasicType type = JVMCIRuntime::kindToBasicType(Handle(THREAD, slotKinds->obj_at(i)), CHECK);

  1068         ScopeValue* first = get_scope_value(value, type, objects, second, CHECK);

  1069         if (second != NULL) {

  1070           locals->append(second);

  1071         }

  1072         locals->append(first);

  1073       } else if (i < local_count + expression_count) {

  1074         BasicType type = JVMCIRuntime::kindToBasicType(Handle(THREAD, slotKinds->obj_at(i)), CHECK);

  1075         ScopeValue* first = get_scope_value(value, type, objects, second, CHECK);

  1076         if (second != NULL) {

  1077           expressions->append(second);

  1078         }

  1079         expressions->append(first);

  1080       } else {

  1081         MonitorValue *monitor = get_monitor_value(value, objects, CHECK);

  1082         monitors->append(monitor);

  1083       }

  1084       if (second != NULL) {

  1085         i++;

  1086         if (i >= values->length() || values->obj_at(i) != Value::ILLEGAL()) {

  1087           JVMCI_ERROR("double-slot value not followed by Value.ILLEGAL");

  1088         }

  1089       }

  1090     }

  1091 

  1092     locals_token = _debug_recorder->create_scope_values(locals);

  1093     expressions_token = _debug_recorder->create_scope_values(expressions);

  1094     monitors_token = _debug_recorder->create_monitor_values(monitors);

  1095 

  1096     throw_exception = BytecodeFrame::rethrowException(frame) == JNI_TRUE;

  1097   }

  1098 

  1099   _debug_recorder->describe_scope(pc_offset, method, NULL, bci, reexecute, throw_exception, false, return_oop,

  1100                                   locals_token, expressions_token, monitors_token);

  1101 }

  1102 

  1103 void CodeInstaller::site_Safepoint(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {

  1104   Handle debug_info (THREAD, site_Infopoint::debugInfo(site));

  1105   if (debug_info.is_null()) {

  1106     JVMCI_ERROR("debug info expected at safepoint at %i", pc_offset);

  1107   }

  1108 

  1109   // address instruction = _instructions->start() + pc_offset;

  1110   // jint next_pc_offset = Assembler::locate_next_instruction(instruction) - _instructions->start();

  1111   OopMap *map = create_oop_map(debug_info, CHECK);

  1112   _debug_recorder->add_safepoint(pc_offset, map);

  1113   record_scope(pc_offset, debug_info, CodeInstaller::FullFrame, CHECK);

  1114   _debug_recorder->end_safepoint(pc_offset);

  1115 }

  1116 

  1117 void CodeInstaller::site_Infopoint(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {

  1118   Handle debug_info (THREAD, site_Infopoint::debugInfo(site));

  1119   if (debug_info.is_null()) {

  1120     JVMCI_ERROR("debug info expected at infopoint at %i", pc_offset);

  1121   }

  1122 

  1123   // We'd like to check that pc_offset is greater than the

  1124   // last pc recorded with _debug_recorder (raising an exception if not)

  1125   // but DebugInformationRecorder doesn't have sufficient public API.

  1126 

  1127   _debug_recorder->add_non_safepoint(pc_offset);

  1128   record_scope(pc_offset, debug_info, CodeInstaller::BytecodePosition, CHECK);

  1129   _debug_recorder->end_non_safepoint(pc_offset);

  1130 }

  1131 

  1132 void CodeInstaller::site_Call(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {

  1133   Handle target(THREAD, site_Call::target(site));

  1134   InstanceKlass* target_klass = InstanceKlass::cast(target->klass());