jdk8-mips64-public/hotspot: src/share/vm/classfile/verificationType.cpp@8adf45218add (annotated)

src/share/vm/classfile/verificationType.cpp@8adf45218add (annotated)

src/share/vm/classfile/verificationType.cpp

Wed, 23 Sep 2020 16:26:20 +0300

author: vkempik
date: Wed, 23 Sep 2020 16:26:20 +0300
changeset 10009: 8adf45218add
parent 9550: 270570f695e0
child 9572: 624a0741915c
permissions: -rw-r--r--

8244955: Additional Fix for JDK-8240124
Reviewed-by: mbalao, andrew

 /*
  * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "classfile/symbolTable.hpp"
 #include "classfile/systemDictionaryShared.hpp"
 #include "classfile/verificationType.hpp"
 #include "classfile/verifier.hpp"
 VerificationType VerificationType::from_tag(u1 tag) {
   switch (tag) {
     case ITEM_Top:     return bogus_type();
     case ITEM_Integer: return integer_type();
     case ITEM_Float:   return float_type();
     case ITEM_Double:  return double_type();
     case ITEM_Long:    return long_type();
     case ITEM_Null:    return null_type();
     default:
       ShouldNotReachHere();
       return bogus_type();
   }
 }
 bool VerificationType::is_reference_assignable_from(
     const VerificationType& from, ClassVerifier* context,
     bool from_field_is_protected, TRAPS) const {
   instanceKlassHandle klass = context->current_class();
   if (from.is_null()) {
     // null is assignable to any reference
     return true;
   } else if (is_null()) {
     return false;
   } else if (name() == from.name()) {
     return true;
   } else if (is_object()) {
     // We need check the class hierarchy to check assignability
     if (name() == vmSymbols::java_lang_Object()) {
       // any object or array is assignable to java.lang.Object
       return true;
     }
     Klass* obj = SystemDictionary::resolve_or_fail(
         name(), Handle(THREAD, klass->class_loader()),
         Handle(THREAD, klass->protection_domain()), true, CHECK_false);
     KlassHandle this_class(THREAD, obj);
     if (this_class->is_interface() && (!from_field_is_protected ||
         from.name() != vmSymbols::java_lang_Object())) {
       // If we are not trying to access a protected field or method in
       // java.lang.Object then we treat interfaces as java.lang.Object,
       // including java.lang.Cloneable and java.io.Serializable.
       return true;
     } else if (from.is_object()) {
       Klass* from_class = SystemDictionary::resolve_or_fail(
           from.name(), Handle(THREAD, klass->class_loader()),
           Handle(THREAD, klass->protection_domain()), true, CHECK_false);
       bool result = InstanceKlass::cast(from_class)->is_subclass_of(this_class());
       if (result && DumpSharedSpaces) {
         if (klass()->is_subclass_of(from_class) && klass()->is_subclass_of(this_class())) {
           // No need to save verification dependency. At run time, <klass> will be
           // loaded from the archived only if <from_class> and <this_class> are
           // also loaded from the archive. I.e., all 3 classes are exactly the same
           // as we saw at archive creation time.
         } else {
           // Save the dependency. At run time, we need to check that the condition
           // from_class->is_subclass_of(this_class() is still true.
           Symbol* accessor_clsname = from.name();
           Symbol* target_clsname = this_class()->name();
           SystemDictionaryShared::add_verification_dependency(klass(),
                        accessor_clsname, target_clsname);
         }
       }
       return result;
     }
   } else if (is_array() && from.is_array()) {
     VerificationType comp_this = get_component(context, CHECK_false);
     VerificationType comp_from = from.get_component(context, CHECK_false);
     if (!comp_this.is_bogus() && !comp_from.is_bogus()) {
       return comp_this.is_assignable_from(comp_from, context,
                                           from_field_is_protected, THREAD);
     }
   }
   return false;
 }
 VerificationType VerificationType::get_component(ClassVerifier *context, TRAPS) const {
   assert(is_array() && name()->utf8_length() >= 2, "Must be a valid array");
   Symbol* component;
   switch (name()->byte_at(1)) {
     case 'Z': return VerificationType(Boolean);
     case 'B': return VerificationType(Byte);
     case 'C': return VerificationType(Char);
     case 'S': return VerificationType(Short);
     case 'I': return VerificationType(Integer);
     case 'J': return VerificationType(Long);
     case 'F': return VerificationType(Float);
     case 'D': return VerificationType(Double);
     case '[':
       component = context->create_temporary_symbol(
         name(), 1, name()->utf8_length(),
         CHECK_(VerificationType::bogus_type()));
       return VerificationType::reference_type(component);
     case 'L':
       component = context->create_temporary_symbol(
         name(), 2, name()->utf8_length() - 1,
         CHECK_(VerificationType::bogus_type()));
       return VerificationType::reference_type(component);
     default:
       // Met an invalid type signature, e.g. [X
       return VerificationType::bogus_type();
   }
 }
 void VerificationType::print_on(outputStream* st) const {
   switch (_u._data) {
     case Bogus:            st->print("top"); break;
     case Category1:        st->print("category1"); break;
     case Category2:        st->print("category2"); break;
     case Category2_2nd:    st->print("category2_2nd"); break;
     case Boolean:          st->print("boolean"); break;
     case Byte:             st->print("byte"); break;
     case Short:            st->print("short"); break;
     case Char:             st->print("char"); break;
     case Integer:          st->print("integer"); break;
     case Float:            st->print("float"); break;
     case Long:             st->print("long"); break;
     case Double:           st->print("double"); break;
     case Long_2nd:         st->print("long_2nd"); break;
     case Double_2nd:       st->print("double_2nd"); break;
     case Null:             st->print("null"); break;
     case ReferenceQuery:   st->print("reference type"); break;
     case Category1Query:   st->print("category1 type"); break;
     case Category2Query:   st->print("category2 type"); break;
     case Category2_2ndQuery: st->print("category2_2nd type"); break;
     default:
       if (is_uninitialized_this()) {
         st->print("uninitializedThis");
       } else if (is_uninitialized()) {
         st->print("uninitialized %d", bci());
       } else {
         name()->print_value_on(st);
       }
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/classfile/verificationType.cpp@8adf45218add (annotated)

src/share/vm/classfile/verificationType.cpp