jdk8-mips64-public/hotspot: src/share/vm/ci/ciObjArrayKlass.cpp@ac27a9c85bea (annotated)

src/share/vm/ci/ciObjArrayKlass.cpp@ac27a9c85bea (annotated)

src/share/vm/ci/ciObjArrayKlass.cpp

Thu, 24 May 2018 18:41:44 +0800

author: aoqi
date: Thu, 24 May 2018 18:41:44 +0800
changeset 8856: ac27a9c85bea
parent 6876: 710a3c8b516e
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1999, 2013, 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 "ci/ciInstanceKlass.hpp"
 #include "ci/ciObjArrayKlass.hpp"
 #include "ci/ciSymbol.hpp"
 #include "ci/ciUtilities.hpp"
 #include "oops/objArrayKlass.hpp"
 // ciObjArrayKlass
 //
 // This class represents a Klass* in the HotSpot virtual machine
 // whose Klass part is an ObjArrayKlass.
 // ------------------------------------------------------------------
 // ciObjArrayKlass::ciObjArrayKlass
 //
 // Constructor for loaded object array klasses.
 ciObjArrayKlass::ciObjArrayKlass(KlassHandle h_k) : ciArrayKlass(h_k) {
   assert(get_Klass()->oop_is_objArray(), "wrong type");
   Klass* element_Klass = get_ObjArrayKlass()->bottom_klass();
   _base_element_klass = CURRENT_ENV->get_klass(element_Klass);
   assert(_base_element_klass->is_instance_klass() ||
          _base_element_klass->is_type_array_klass(), "bad base klass");
   if (dimension() == 1) {
     _element_klass = _base_element_klass;
   } else {
     _element_klass = NULL;
   }
   if (!ciObjectFactory::is_initialized()) {
     assert(_element_klass->is_java_lang_Object(), "only arrays of object are shared");
   }
 }
 // ------------------------------------------------------------------
 // ciObjArrayKlass::ciObjArrayKlass
 //
 // Constructor for unloaded object array klasses.
 ciObjArrayKlass::ciObjArrayKlass(ciSymbol* array_name,
                                  ciKlass* base_element_klass,
                                  int dimension)
   : ciArrayKlass(array_name,
                  dimension, T_OBJECT) {
     _base_element_klass = base_element_klass;
     assert(_base_element_klass->is_instance_klass() ||
            _base_element_klass->is_type_array_klass(), "bad base klass");
     if (dimension == 1) {
       _element_klass = base_element_klass;
     } else {
       _element_klass = NULL;
     }
 }
 // ------------------------------------------------------------------
 // ciObjArrayKlass::element_klass
 //
 // What is the one-level element type of this array?
 ciKlass* ciObjArrayKlass::element_klass() {
   if (_element_klass == NULL) {
     assert(dimension() > 1, "_element_klass should not be NULL");
     // Produce the element klass.
     if (is_loaded()) {
       VM_ENTRY_MARK;
       Klass* element_Klass = get_ObjArrayKlass()->element_klass();
       _element_klass = CURRENT_THREAD_ENV->get_klass(element_Klass);
     } else {
       VM_ENTRY_MARK;
       // We are an unloaded array klass.  Attempt to fetch our
       // element klass by name.
       _element_klass = CURRENT_THREAD_ENV->get_klass_by_name_impl(
                           this,
                           constantPoolHandle(),
                           construct_array_name(base_element_klass()->name(),
                                                dimension() - 1),
                           false);
     }
   }
   return _element_klass;
 }
 // ------------------------------------------------------------------
 // ciObjArrayKlass::construct_array_name
 //
 // Build an array name from an element name and a dimension.
 ciSymbol* ciObjArrayKlass::construct_array_name(ciSymbol* element_name,
                                                 int dimension) {
   EXCEPTION_CONTEXT;
   int element_len = element_name->utf8_length();
   Symbol* base_name_sym = element_name->get_symbol();
   char* name;
   if (base_name_sym->byte_at(0) == '[' ||
       (base_name_sym->byte_at(0) == 'L' &&  // watch package name 'Lxx'
        base_name_sym->byte_at(element_len-1) == ';')) {
     int new_len = element_len + dimension + 1; // for the ['s and '\0'
     name = CURRENT_THREAD_ENV->name_buffer(new_len);
     int pos = 0;
     for ( ; pos < dimension; pos++) {
       name[pos] = '[';
     }
     strncpy(name+pos, (char*)element_name->base(), element_len);
     name[new_len-1] = '\0';
   } else {
     int new_len =   3                       // for L, ;, and '\0'
                   + dimension               // for ['s
                   + element_len;
     name = CURRENT_THREAD_ENV->name_buffer(new_len);
     int pos = 0;
     for ( ; pos < dimension; pos++) {
       name[pos] = '[';
     }
     name[pos++] = 'L';
     strncpy(name+pos, (char*)element_name->base(), element_len);
     name[new_len-2] = ';';
     name[new_len-1] = '\0';
   }
   return ciSymbol::make(name);
 }
 // ------------------------------------------------------------------
 // ciObjArrayKlass::make_impl
 //
 // Implementation of make.
 ciObjArrayKlass* ciObjArrayKlass::make_impl(ciKlass* element_klass) {
   if (element_klass->is_loaded()) {
     EXCEPTION_CONTEXT;
     // The element klass is loaded
     Klass* array = element_klass->get_Klass()->array_klass(THREAD);
     if (HAS_PENDING_EXCEPTION) {
       CLEAR_PENDING_EXCEPTION;
       CURRENT_THREAD_ENV->record_out_of_memory_failure();
       return ciEnv::unloaded_ciobjarrayklass();
     }
     return CURRENT_THREAD_ENV->get_obj_array_klass(array);
   }
   // The array klass was unable to be made or the element klass was
   // not loaded.
   ciSymbol* array_name = construct_array_name(element_klass->name(), 1);
   if (array_name == ciEnv::unloaded_cisymbol()) {
     return ciEnv::unloaded_ciobjarrayklass();
   }
   return
     CURRENT_ENV->get_unloaded_klass(element_klass, array_name)
                         ->as_obj_array_klass();
 }
 // ------------------------------------------------------------------
 // ciObjArrayKlass::make
 //
 // Make an array klass corresponding to the specified primitive type.
 ciObjArrayKlass* ciObjArrayKlass::make(ciKlass* element_klass) {
   GUARDED_VM_ENTRY(return make_impl(element_klass);)
 }
 ciKlass* ciObjArrayKlass::exact_klass() {
   ciType* base = base_element_type();
   if (base->is_instance_klass()) {
     ciInstanceKlass* ik = base->as_instance_klass();
     if (ik->exact_klass() != NULL) {
       return this;
     }
   } else if (base->is_primitive_type()) {
     return this;
   }
   return NULL;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/ci/ciObjArrayKlass.cpp@ac27a9c85bea (annotated)

src/share/vm/ci/ciObjArrayKlass.cpp