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/*
* Copyright 1999-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
#include "incls/_precompiled.incl"
#include "incls/_ciObjArrayKlass.cpp.incl"
// ciObjArrayKlass
//
// This class represents a klassOop 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");
klassOop element_klassOop = get_objArrayKlass()->bottom_klass();
_base_element_klass = CURRENT_ENV->get_object(element_klassOop)->as_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,
ciObjArrayKlassKlass::make()) {
_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;
klassOop element_klassOop = get_objArrayKlass()->element_klass();
_element_klass = CURRENT_THREAD_ENV->get_object(element_klassOop)->as_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,
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();
symbolOop base_name_sym = element_name->get_symbolOop();
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
klassOop 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_object(array)->as_obj_array_klass();
}
// 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) {
assert(element_klass->is_java_klass(), "wrong kind of klass");
GUARDED_VM_ENTRY(return make_impl(element_klass);)
}
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