author | coleenp |
Sat, 01 Sep 2012 13:25:18 -0400 | |
changeset 13728 | 882756847a04 |
parent 12379 | 2cf45b79ce3a |
child 13952 | e3cf184080bc |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#include "precompiled.hpp" |
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#include "classfile/javaClasses.hpp" |
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#include "classfile/dictionary.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "classfile/vmSymbols.hpp" |
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#include "gc_implementation/shared/markSweep.inline.hpp" |
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#include "gc_interface/collectedHeap.inline.hpp" |
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#include "memory/metadataFactory.hpp" |
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#include "memory/oopFactory.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "oops/instanceKlass.hpp" |
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#include "oops/klass.inline.hpp" |
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#include "oops/oop.inline2.hpp" |
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#include "runtime/atomic.hpp" |
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#include "utilities/stack.hpp" |
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#ifndef SERIALGC |
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#include "gc_implementation/parallelScavenge/psParallelCompact.hpp" |
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#include "gc_implementation/parallelScavenge/psPromotionManager.hpp" |
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#include "gc_implementation/parallelScavenge/psScavenge.hpp" |
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#endif |
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void Klass::set_name(Symbol* n) { |
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_name = n; |
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if (_name != NULL) _name->increment_refcount(); |
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} |
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bool Klass::is_subclass_of(Klass* k) const { |
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// Run up the super chain and check |
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if (this == k) return true; |
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Klass* t = const_cast<Klass*>(this)->super(); |
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while (t != NULL) { |
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if (t == k) return true; |
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t = Klass::cast(t)->super(); |
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} |
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return false; |
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} |
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bool Klass::search_secondary_supers(Klass* k) const { |
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// Put some extra logic here out-of-line, before the search proper. |
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// This cuts down the size of the inline method. |
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// This is necessary, since I am never in my own secondary_super list. |
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if (this == k) |
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return true; |
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// Scan the array-of-objects for a match |
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int cnt = secondary_supers()->length(); |
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for (int i = 0; i < cnt; i++) { |
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if (secondary_supers()->at(i) == k) { |
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((Klass*)this)->set_secondary_super_cache(k); |
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return true; |
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} |
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} |
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return false; |
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} |
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// Return self, except for abstract classes with exactly 1 |
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// implementor. Then return the 1 concrete implementation. |
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Klass *Klass::up_cast_abstract() { |
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Klass *r = this; |
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while( r->is_abstract() ) { // Receiver is abstract? |
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Klass *s = r->subklass(); // Check for exactly 1 subklass |
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if( !s || s->next_sibling() ) // Oops; wrong count; give up |
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return this; // Return 'this' as a no-progress flag |
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r = s; // Loop till find concrete class |
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} |
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return r; // Return the 1 concrete class |
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} |
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// Find LCA in class hierarchy |
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Klass *Klass::LCA( Klass *k2 ) { |
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Klass *k1 = this; |
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while( 1 ) { |
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if( k1->is_subtype_of(k2) ) return k2; |
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if( k2->is_subtype_of(k1) ) return k1; |
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k1 = k1->super(); |
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k2 = k2->super(); |
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} |
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} |
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void Klass::check_valid_for_instantiation(bool throwError, TRAPS) { |
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ResourceMark rm(THREAD); |
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THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() |
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: vmSymbols::java_lang_InstantiationException(), external_name()); |
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} |
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void Klass::copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) { |
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THROW(vmSymbols::java_lang_ArrayStoreException()); |
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} |
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void Klass::initialize(TRAPS) { |
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ShouldNotReachHere(); |
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} |
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bool Klass::compute_is_subtype_of(Klass* k) { |
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assert(k->is_klass(), "argument must be a class"); |
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return is_subclass_of(k); |
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} |
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Method* Klass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
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#ifdef ASSERT |
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tty->print_cr("Error: uncached_lookup_method called on a klass oop." |
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" Likely error: reflection method does not correctly" |
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" wrap return value in a mirror object."); |
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#endif |
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ShouldNotReachHere(); |
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return NULL; |
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} |
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void* Klass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) { |
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return Metaspace::allocate(loader_data, word_size, /*read_only*/false, |
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Metaspace::ClassType, CHECK_NULL); |
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} |
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Klass::Klass() { |
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Klass* k = this; |
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{ // Preinitialize supertype information. |
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// A later call to initialize_supers() may update these settings: |
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set_super(NULL); |
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for (juint i = 0; i < Klass::primary_super_limit(); i++) { |
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_primary_supers[i] = NULL; |
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} |
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set_secondary_supers(NULL); |
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_primary_supers[0] = k; |
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set_super_check_offset(in_bytes(primary_supers_offset())); |
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} |
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set_java_mirror(NULL); |
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set_modifier_flags(0); |
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set_layout_helper(Klass::_lh_neutral_value); |
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set_name(NULL); |
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AccessFlags af; |
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af.set_flags(0); |
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set_access_flags(af); |
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set_subklass(NULL); |
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set_next_sibling(NULL); |
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set_next_link(NULL); |
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set_alloc_count(0); |
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TRACE_SET_KLASS_TRACE_ID(this, 0); |
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set_prototype_header(markOopDesc::prototype()); |
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set_biased_lock_revocation_count(0); |
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set_last_biased_lock_bulk_revocation_time(0); |
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// The klass doesn't have any references at this point. |
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clear_modified_oops(); |
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clear_accumulated_modified_oops(); |
1 | 178 |
} |
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180 |
jint Klass::array_layout_helper(BasicType etype) { |
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181 |
assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype"); |
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182 |
// Note that T_ARRAY is not allowed here. |
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183 |
int hsize = arrayOopDesc::base_offset_in_bytes(etype); |
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int esize = type2aelembytes(etype); |
1 | 185 |
bool isobj = (etype == T_OBJECT); |
186 |
int tag = isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value; |
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187 |
int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize)); |
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188 |
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189 |
assert(lh < (int)_lh_neutral_value, "must look like an array layout"); |
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assert(layout_helper_is_array(lh), "correct kind"); |
1 | 191 |
assert(layout_helper_is_objArray(lh) == isobj, "correct kind"); |
192 |
assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind"); |
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193 |
assert(layout_helper_header_size(lh) == hsize, "correct decode"); |
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194 |
assert(layout_helper_element_type(lh) == etype, "correct decode"); |
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195 |
assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode"); |
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196 |
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197 |
return lh; |
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198 |
} |
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199 |
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200 |
bool Klass::can_be_primary_super_slow() const { |
|
201 |
if (super() == NULL) |
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202 |
return true; |
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else if (super()->super_depth() >= primary_super_limit()-1) |
1 | 204 |
return false; |
205 |
else |
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206 |
return true; |
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207 |
} |
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void Klass::initialize_supers(Klass* k, TRAPS) { |
1 | 210 |
if (FastSuperclassLimit == 0) { |
211 |
// None of the other machinery matters. |
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212 |
set_super(k); |
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213 |
return; |
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214 |
} |
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215 |
if (k == NULL) { |
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216 |
set_super(NULL); |
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_primary_supers[0] = this; |
1 | 218 |
assert(super_depth() == 0, "Object must already be initialized properly"); |
4571 | 219 |
} else if (k != super() || k == SystemDictionary::Object_klass()) { |
220 |
assert(super() == NULL || super() == SystemDictionary::Object_klass(), |
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1 | 221 |
"initialize this only once to a non-trivial value"); |
222 |
set_super(k); |
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Klass* sup = k; |
1 | 224 |
int sup_depth = sup->super_depth(); |
225 |
juint my_depth = MIN2(sup_depth + 1, (int)primary_super_limit()); |
|
226 |
if (!can_be_primary_super_slow()) |
|
227 |
my_depth = primary_super_limit(); |
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228 |
for (juint i = 0; i < my_depth; i++) { |
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_primary_supers[i] = sup->_primary_supers[i]; |
1 | 230 |
} |
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Klass* *super_check_cell; |
1 | 232 |
if (my_depth < primary_super_limit()) { |
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_primary_supers[my_depth] = this; |
1 | 234 |
super_check_cell = &_primary_supers[my_depth]; |
235 |
} else { |
|
236 |
// Overflow of the primary_supers array forces me to be secondary. |
|
237 |
super_check_cell = &_secondary_super_cache; |
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238 |
} |
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set_super_check_offset((address)super_check_cell - (address) this); |
1 | 240 |
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241 |
#ifdef ASSERT |
|
242 |
{ |
|
243 |
juint j = super_depth(); |
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244 |
assert(j == my_depth, "computed accessor gets right answer"); |
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Klass* t = this; |
1 | 246 |
while (!Klass::cast(t)->can_be_primary_super()) { |
247 |
t = Klass::cast(t)->super(); |
|
248 |
j = Klass::cast(t)->super_depth(); |
|
249 |
} |
|
250 |
for (juint j1 = j+1; j1 < primary_super_limit(); j1++) { |
|
251 |
assert(primary_super_of_depth(j1) == NULL, "super list padding"); |
|
252 |
} |
|
253 |
while (t != NULL) { |
|
254 |
assert(primary_super_of_depth(j) == t, "super list initialization"); |
|
255 |
t = Klass::cast(t)->super(); |
|
256 |
--j; |
|
257 |
} |
|
258 |
assert(j == (juint)-1, "correct depth count"); |
|
259 |
} |
|
260 |
#endif |
|
261 |
} |
|
262 |
||
263 |
if (secondary_supers() == NULL) { |
|
264 |
KlassHandle this_kh (THREAD, this); |
|
265 |
||
266 |
// Now compute the list of secondary supertypes. |
|
267 |
// Secondaries can occasionally be on the super chain, |
|
268 |
// if the inline "_primary_supers" array overflows. |
|
269 |
int extras = 0; |
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Klass* p; |
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271 |
for (p = super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) { |
1 | 272 |
++extras; |
273 |
} |
|
274 |
||
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ResourceMark rm(THREAD); // need to reclaim GrowableArrays allocated below |
1 | 276 |
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// Compute the "real" non-extra secondaries. |
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GrowableArray<Klass*>* secondaries = compute_secondary_supers(extras); |
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279 |
if (secondaries == NULL) { |
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// secondary_supers set by compute_secondary_supers |
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281 |
return; |
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282 |
} |
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283 |
|
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284 |
GrowableArray<Klass*>* primaries = new GrowableArray<Klass*>(extras); |
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285 |
|
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286 |
for (p = this_kh->super(); !(p == NULL || p->can_be_primary_super()); p = p->super()) { |
1 | 287 |
int i; // Scan for overflow primaries being duplicates of 2nd'arys |
288 |
||
289 |
// This happens frequently for very deeply nested arrays: the |
|
290 |
// primary superclass chain overflows into the secondary. The |
|
291 |
// secondary list contains the element_klass's secondaries with |
|
292 |
// an extra array dimension added. If the element_klass's |
|
293 |
// secondary list already contains some primary overflows, they |
|
294 |
// (with the extra level of array-ness) will collide with the |
|
295 |
// normal primary superclass overflows. |
|
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296 |
for( i = 0; i < secondaries->length(); i++ ) { |
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297 |
if( secondaries->at(i) == p ) |
1 | 298 |
break; |
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299 |
} |
1 | 300 |
if( i < secondaries->length() ) |
301 |
continue; // It's a dup, don't put it in |
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primaries->push(p); |
1 | 303 |
} |
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304 |
// Combine the two arrays into a metadata object to pack the array. |
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305 |
// The primaries are added in the reverse order, then the secondaries. |
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306 |
int new_length = primaries->length() + secondaries->length(); |
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Array<Klass*>* s2 = MetadataFactory::new_array<Klass*>( |
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308 |
class_loader_data(), new_length, CHECK); |
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309 |
int fill_p = primaries->length(); |
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310 |
for (int j = 0; j < fill_p; j++) { |
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311 |
s2->at_put(j, primaries->pop()); // add primaries in reverse order. |
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312 |
} |
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313 |
for( int j = 0; j < secondaries->length(); j++ ) { |
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314 |
s2->at_put(j+fill_p, secondaries->at(j)); // add secondaries on the end. |
1 | 315 |
} |
316 |
||
317 |
#ifdef ASSERT |
|
318 |
// We must not copy any NULL placeholders left over from bootstrap. |
|
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319 |
for (int j = 0; j < s2->length(); j++) { |
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320 |
assert(s2->at(j) != NULL, "correct bootstrapping order"); |
1 | 321 |
} |
322 |
#endif |
|
323 |
||
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324 |
this_kh->set_secondary_supers(s2); |
1 | 325 |
} |
326 |
} |
|
327 |
||
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328 |
GrowableArray<Klass*>* Klass::compute_secondary_supers(int num_extra_slots) { |
1 | 329 |
assert(num_extra_slots == 0, "override for complex klasses"); |
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330 |
set_secondary_supers(Universe::the_empty_klass_array()); |
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331 |
return NULL; |
1 | 332 |
} |
333 |
||
334 |
||
335 |
Klass* Klass::subklass() const { |
|
336 |
return _subklass == NULL ? NULL : Klass::cast(_subklass); |
|
337 |
} |
|
338 |
||
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339 |
InstanceKlass* Klass::superklass() const { |
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340 |
assert(super() == NULL || super()->oop_is_instance(), "must be instance klass"); |
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341 |
return _super == NULL ? NULL : InstanceKlass::cast(_super); |
1 | 342 |
} |
343 |
||
344 |
Klass* Klass::next_sibling() const { |
|
345 |
return _next_sibling == NULL ? NULL : Klass::cast(_next_sibling); |
|
346 |
} |
|
347 |
||
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348 |
void Klass::set_subklass(Klass* s) { |
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349 |
assert(s != this, "sanity check"); |
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350 |
_subklass = s; |
1 | 351 |
} |
352 |
||
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353 |
void Klass::set_next_sibling(Klass* s) { |
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354 |
assert(s != this, "sanity check"); |
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|
355 |
_next_sibling = s; |
1 | 356 |
} |
357 |
||
358 |
void Klass::append_to_sibling_list() { |
|
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359 |
debug_only(if (!SharedSkipVerify) verify();) |
1 | 360 |
// add ourselves to superklass' subklass list |
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361 |
InstanceKlass* super = superklass(); |
1 | 362 |
if (super == NULL) return; // special case: class Object |
363 |
assert(SharedSkipVerify || |
|
364 |
(!super->is_interface() // interfaces cannot be supers |
|
365 |
&& (super->superklass() == NULL || !is_interface())), |
|
366 |
"an interface can only be a subklass of Object"); |
|
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367 |
Klass* prev_first_subklass = super->subklass_oop(); |
1 | 368 |
if (prev_first_subklass != NULL) { |
369 |
// set our sibling to be the superklass' previous first subklass |
|
370 |
set_next_sibling(prev_first_subklass); |
|
371 |
} |
|
372 |
// make ourselves the superklass' first subklass |
|
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373 |
super->set_subklass(this); |
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|
374 |
debug_only(if (!SharedSkipVerify) verify();) |
1 | 375 |
} |
376 |
||
377 |
void Klass::remove_from_sibling_list() { |
|
378 |
// remove receiver from sibling list |
|
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379 |
InstanceKlass* super = superklass(); |
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|
380 |
assert(super != NULL || this == SystemDictionary::Object_klass(), "should have super"); |
1 | 381 |
if (super == NULL) return; // special case: class Object |
382 |
if (super->subklass() == this) { |
|
383 |
// first subklass |
|
384 |
super->set_subklass(_next_sibling); |
|
385 |
} else { |
|
386 |
Klass* sib = super->subklass(); |
|
387 |
while (sib->next_sibling() != this) { |
|
388 |
sib = sib->next_sibling(); |
|
389 |
}; |
|
390 |
sib->set_next_sibling(_next_sibling); |
|
391 |
} |
|
392 |
} |
|
393 |
||
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394 |
bool Klass::is_loader_alive(BoolObjectClosure* is_alive) { |
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395 |
assert(is_metadata(), "p is not meta-data"); |
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396 |
assert(ClassLoaderDataGraph::contains((address)this), "is in the metaspace"); |
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397 |
// The class is alive iff the class loader is alive. |
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|
398 |
oop loader = class_loader(); |
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|
399 |
return (loader == NULL) || is_alive->do_object_b(loader); |
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|
400 |
} |
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|
401 |
|
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|
402 |
void Klass::clean_weak_klass_links(BoolObjectClosure* is_alive) { |
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|
403 |
if (!ClassUnloading) { |
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|
404 |
return; |
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|
405 |
} |
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|
406 |
|
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|
407 |
Klass* root = SystemDictionary::Object_klass(); |
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|
408 |
Stack<Klass*, mtGC> stack; |
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|
409 |
|
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|
410 |
stack.push(root); |
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|
411 |
while (!stack.is_empty()) { |
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|
412 |
Klass* current = stack.pop(); |
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|
413 |
|
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|
414 |
assert(current->is_loader_alive(is_alive), "just checking, this should be live"); |
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|
415 |
|
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|
416 |
// Find and set the first alive subklass |
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|
417 |
Klass* sub = current->subklass_oop(); |
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|
418 |
while (sub != NULL && !sub->is_loader_alive(is_alive)) { |
1 | 419 |
#ifndef PRODUCT |
420 |
if (TraceClassUnloading && WizardMode) { |
|
421 |
ResourceMark rm; |
|
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|
422 |
tty->print_cr("[Unlinking class (subclass) %s]", sub->external_name()); |
1 | 423 |
} |
424 |
#endif |
|
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|
425 |
sub = sub->next_sibling_oop(); |
1 | 426 |
} |
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|
427 |
current->set_subklass(sub); |
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|
428 |
if (sub != NULL) { |
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|
429 |
stack.push(sub); |
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|
430 |
} |
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|
431 |
|
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|
432 |
// Find and set the first alive sibling |
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|
433 |
Klass* sibling = current->next_sibling_oop(); |
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|
434 |
while (sibling != NULL && !sibling->is_loader_alive(is_alive)) { |
1 | 435 |
if (TraceClassUnloading && WizardMode) { |
436 |
ResourceMark rm; |
|
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|
437 |
tty->print_cr("[Unlinking class (sibling) %s]", sibling->external_name()); |
1 | 438 |
} |
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|
439 |
sibling = sibling->next_sibling_oop(); |
1 | 440 |
} |
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|
441 |
current->set_next_sibling(sibling); |
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|
442 |
if (sibling != NULL) { |
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|
443 |
stack.push(sibling); |
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|
444 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
445 |
|
882756847a04
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changeset
|
446 |
// Clean the implementors list and method data. |
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changeset
|
447 |
if (current->oop_is_instance()) { |
882756847a04
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diff
changeset
|
448 |
InstanceKlass* ik = InstanceKlass::cast(current); |
882756847a04
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parents:
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changeset
|
449 |
ik->clean_implementors_list(is_alive); |
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changeset
|
450 |
ik->clean_method_data(is_alive); |
1 | 451 |
} |
452 |
} |
|
453 |
} |
|
454 |
||
13728
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|
455 |
void Klass::klass_update_barrier_set(oop v) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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parents:
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diff
changeset
|
456 |
record_modified_oops(); |
882756847a04
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parents:
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diff
changeset
|
457 |
} |
882756847a04
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parents:
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diff
changeset
|
458 |
|
882756847a04
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diff
changeset
|
459 |
void Klass::klass_update_barrier_set_pre(void* p, oop v) { |
882756847a04
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changeset
|
460 |
// This barrier used by G1, where it's used remember the old oop values, |
882756847a04
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|
461 |
// so that we don't forget any objects that were live at the snapshot at |
882756847a04
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parents:
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diff
changeset
|
462 |
// the beginning. This function is only used when we write oops into |
882756847a04
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|
463 |
// Klasses. Since the Klasses are used as roots in G1, we don't have to |
882756847a04
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diff
changeset
|
464 |
// do anything here. |
882756847a04
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parents:
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diff
changeset
|
465 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
466 |
|
882756847a04
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diff
changeset
|
467 |
void Klass::klass_oop_store(oop* p, oop v) { |
882756847a04
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parents:
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changeset
|
468 |
assert(!Universe::heap()->is_in_reserved((void*)p), "Should store pointer into metadata"); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
469 |
assert(v == NULL || Universe::heap()->is_in_reserved((void*)v), "Should store pointer to an object"); |
882756847a04
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parents:
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diff
changeset
|
470 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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parents:
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diff
changeset
|
471 |
// do the store |
882756847a04
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parents:
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diff
changeset
|
472 |
if (always_do_update_barrier) { |
882756847a04
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parents:
12379
diff
changeset
|
473 |
klass_oop_store((volatile oop*)p, v); |
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parents:
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diff
changeset
|
474 |
} else { |
882756847a04
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changeset
|
475 |
klass_update_barrier_set_pre((void*)p, v); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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parents:
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changeset
|
476 |
*p = v; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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parents:
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changeset
|
477 |
klass_update_barrier_set(v); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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parents:
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diff
changeset
|
478 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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parents:
12379
diff
changeset
|
479 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
480 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
481 |
void Klass::klass_oop_store(volatile oop* p, oop v) { |
882756847a04
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coleenp
parents:
12379
diff
changeset
|
482 |
assert(!Universe::heap()->is_in_reserved((void*)p), "Should store pointer into metadata"); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
483 |
assert(v == NULL || Universe::heap()->is_in_reserved((void*)v), "Should store pointer to an object"); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
484 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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parents:
12379
diff
changeset
|
485 |
klass_update_barrier_set_pre((void*)p, v); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
486 |
OrderAccess::release_store_ptr(p, v); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
487 |
klass_update_barrier_set(v); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
488 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
489 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
490 |
void Klass::oops_do(OopClosure* cl) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
491 |
cl->do_oop(&_java_mirror); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
492 |
} |
1 | 493 |
|
494 |
void Klass::remove_unshareable_info() { |
|
495 |
set_subklass(NULL); |
|
496 |
set_next_sibling(NULL); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
497 |
// Clear the java mirror |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
498 |
set_java_mirror(NULL); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
499 |
set_next_link(NULL); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
500 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
501 |
// Null out class_loader_data because we don't share that yet. |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
502 |
set_class_loader_data(NULL); |
1 | 503 |
} |
504 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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parents:
12379
diff
changeset
|
505 |
void Klass::restore_unshareable_info(TRAPS) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
506 |
ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
507 |
// Restore class_loader_data to the null class loader data |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
508 |
set_class_loader_data(loader_data); |
1 | 509 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
510 |
// Add to null class loader list first before creating the mirror |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
511 |
// (same order as class file parsing) |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
512 |
loader_data->add_class(this); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
513 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
514 |
// Recreate the class mirror |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
515 |
java_lang_Class::create_mirror(this, CHECK); |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
516 |
} |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
517 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
518 |
Klass* Klass::array_klass_or_null(int rank) { |
1 | 519 |
EXCEPTION_MARK; |
520 |
// No exception can be thrown by array_klass_impl when called with or_null == true. |
|
521 |
// (In anycase, the execption mark will fail if it do so) |
|
522 |
return array_klass_impl(true, rank, THREAD); |
|
523 |
} |
|
524 |
||
525 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
526 |
Klass* Klass::array_klass_or_null() { |
1 | 527 |
EXCEPTION_MARK; |
528 |
// No exception can be thrown by array_klass_impl when called with or_null == true. |
|
529 |
// (In anycase, the execption mark will fail if it do so) |
|
530 |
return array_klass_impl(true, THREAD); |
|
531 |
} |
|
532 |
||
533 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
534 |
Klass* Klass::array_klass_impl(bool or_null, int rank, TRAPS) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
535 |
fatal("array_klass should be dispatched to InstanceKlass, objArrayKlass or typeArrayKlass"); |
1 | 536 |
return NULL; |
537 |
} |
|
538 |
||
539 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
540 |
Klass* Klass::array_klass_impl(bool or_null, TRAPS) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
541 |
fatal("array_klass should be dispatched to InstanceKlass, objArrayKlass or typeArrayKlass"); |
1 | 542 |
return NULL; |
543 |
} |
|
544 |
||
545 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
546 |
void Klass::with_array_klasses_do(void f(Klass* k)) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
547 |
f(this); |
1 | 548 |
} |
549 |
||
550 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
551 |
oop Klass::class_loader() const { return class_loader_data()->class_loader(); } |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
552 |
|
1 | 553 |
const char* Klass::external_name() const { |
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
554 |
if (oop_is_instance()) { |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
555 |
InstanceKlass* ik = (InstanceKlass*) this; |
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
556 |
if (ik->is_anonymous()) { |
8883
5569135acca3
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
8076
diff
changeset
|
557 |
assert(EnableInvokeDynamic, ""); |
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
558 |
intptr_t hash = ik->java_mirror()->identity_hash(); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
559 |
char hash_buf[40]; |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
560 |
sprintf(hash_buf, "/" UINTX_FORMAT, (uintx)hash); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
561 |
size_t hash_len = strlen(hash_buf); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
562 |
|
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
563 |
size_t result_len = name()->utf8_length(); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
564 |
char* result = NEW_RESOURCE_ARRAY(char, result_len + hash_len + 1); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
565 |
name()->as_klass_external_name(result, (int) result_len + 1); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
566 |
assert(strlen(result) == result_len, ""); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
567 |
strcpy(result + result_len, hash_buf); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
568 |
assert(strlen(result) == result_len + hash_len, ""); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
569 |
return result; |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
570 |
} |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
670
diff
changeset
|
571 |
} |
4094
1f424b2b2171
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
2131
diff
changeset
|
572 |
if (name() == NULL) return "<unknown>"; |
1 | 573 |
return name()->as_klass_external_name(); |
574 |
} |
|
575 |
||
576 |
||
4094
1f424b2b2171
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
2131
diff
changeset
|
577 |
const char* Klass::signature_name() const { |
1f424b2b2171
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
2131
diff
changeset
|
578 |
if (name() == NULL) return "<unknown>"; |
1 | 579 |
return name()->as_C_string(); |
580 |
} |
|
581 |
||
582 |
// Unless overridden, modifier_flags is 0. |
|
583 |
jint Klass::compute_modifier_flags(TRAPS) const { |
|
584 |
return 0; |
|
585 |
} |
|
586 |
||
587 |
int Klass::atomic_incr_biased_lock_revocation_count() { |
|
588 |
return (int) Atomic::add(1, &_biased_lock_revocation_count); |
|
589 |
} |
|
590 |
||
591 |
// Unless overridden, jvmti_class_status has no flags set. |
|
592 |
jint Klass::jvmti_class_status() const { |
|
593 |
return 0; |
|
594 |
} |
|
595 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
596 |
|
1 | 597 |
// Printing |
598 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
599 |
void Klass::print_on(outputStream* st) const { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
600 |
ResourceMark rm; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
601 |
// print title |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
602 |
st->print("%s", internal_name()); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
603 |
print_address_on(st); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
604 |
st->cr(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
605 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12379
diff
changeset
|
606 |
|
1 | 607 |
void Klass::oop_print_on(oop obj, outputStream* st) { |
608 |
ResourceMark rm; |
|
609 |
// print title |
|
610 |
st->print_cr("%s ", internal_name()); |
|
611 |
obj->print_address_on(st); |
|
612 |
||
613 |
if (WizardMode) { |
|
614 |
// print header |
|
615 |
obj->mark()->print_on(st); |
|
616 |
} |
|
617 |
||
618 |
// print class |
|
619 |
st->print(" - klass: "); |
|
620 |
obj->klass()->print_value_on(st); |
|
621 |
st->cr(); |
|
622 |
} |
|
623 |
||
624 |
void Klass::oop_print_value_on(oop obj, outputStream* st) { |
|
625 |
// print title |
|
626 |
ResourceMark rm; // Cannot print in debug mode without this |
|
627 |
st->print("%s", internal_name()); |
|
628 |
obj->print_address_on(st); |
|
629 |
} |
|
630 |
||
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1 | 632 |
// Verification |
633 |
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void Klass::verify_on(outputStream* st) { |
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guarantee(!Universe::heap()->is_in_reserved(this), "Shouldn't be"); |
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guarantee(this->is_metadata(), "should be in metaspace"); |
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637 |
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assert(ClassLoaderDataGraph::contains((address)this), "Should be"); |
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639 |
|
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640 |
guarantee(this->is_klass(),"should be klass"); |
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641 |
|
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642 |
if (super() != NULL) { |
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643 |
guarantee(super()->is_metadata(), "should be in metaspace"); |
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644 |
guarantee(super()->is_klass(), "should be klass"); |
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645 |
} |
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646 |
if (secondary_super_cache() != NULL) { |
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647 |
Klass* ko = secondary_super_cache(); |
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648 |
guarantee(ko->is_metadata(), "should be in metaspace"); |
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649 |
guarantee(ko->is_klass(), "should be klass"); |
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650 |
} |
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651 |
for ( uint i = 0; i < primary_super_limit(); i++ ) { |
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652 |
Klass* ko = _primary_supers[i]; |
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653 |
if (ko != NULL) { |
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654 |
guarantee(ko->is_metadata(), "should be in metaspace"); |
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655 |
guarantee(ko->is_klass(), "should be klass"); |
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656 |
} |
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|
657 |
} |
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|
658 |
|
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|
659 |
if (java_mirror() != NULL) { |
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660 |
guarantee(java_mirror()->is_oop(), "should be instance"); |
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661 |
} |
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662 |
} |
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663 |
|
1 | 664 |
void Klass::oop_verify_on(oop obj, outputStream* st) { |
665 |
guarantee(obj->is_oop(), "should be oop"); |
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guarantee(obj->klass()->is_metadata(), "should not be in Java heap"); |
1 | 667 |
guarantee(obj->klass()->is_klass(), "klass field is not a klass"); |
668 |
} |
|
669 |
||
670 |
#ifndef PRODUCT |
|
671 |
||
672 |
void Klass::verify_vtable_index(int i) { |
|
673 |
if (oop_is_instance()) { |
|
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assert(i>=0 && i<((InstanceKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds"); |
1 | 675 |
} else { |
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676 |
assert(oop_is_array(), "Must be"); |
1 | 677 |
assert(i>=0 && i<((arrayKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds"); |
678 |
} |
|
679 |
} |
|
680 |
||
681 |
#endif |