Mercurial > hg > graal-jvmci-8
view src/share/vm/memory/classify.hpp @ 2226:c5a923563727
6912621: iCMS: Error: assert(_markBitMap.isMarked(addr + 1),"Missing Printezis bit?")
Summary: Fix block_size_if_printezis_bits() so it does not expect the bits, only uses them when available. Fix block_size_no_stall() so it does not stall when the bits are missing such cases, letting the caller deal with zero size returns. Constant pool cache oops do not need to be unparsable or conc_unsafe after their klass pointer is installed. Some cosmetic clean-ups and some assertion checking for conc-usafety which, in the presence of class file redefinition, has no a-priori time boundedness, so all GCs must be able to safely deal with putatively conc-unsafe objects in a stop-world pause.
Reviewed-by: jmasa, johnc
author | ysr |
---|---|
date | Mon, 07 Feb 2011 22:19:57 -0800 |
parents | f95d63e2154a |
children |
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/* * Copyright (c) 2003, 2010, 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. * */ #ifndef SHARE_VM_MEMORY_CLASSIFY_HPP #define SHARE_VM_MEMORY_CLASSIFY_HPP #include "oops/oop.inline.hpp" typedef enum oop_type { unknown_type, instance_type, instanceRef_type, objArray_type, symbol_type, klass_type, instanceKlass_type, method_type, constMethod_type, methodData_type, constantPool_type, constantPoolCache_type, typeArray_type, compiledICHolder_type, number_object_types } object_type; // Classify objects by type and keep counts. // Print the count and space taken for each type. class ClassifyObjectClosure : public ObjectClosure { private: static const char* object_type_name[number_object_types]; int total_object_count; size_t total_object_size; int object_count[number_object_types]; size_t object_size[number_object_types]; public: ClassifyObjectClosure() { reset(); } void reset(); void do_object(oop obj); static object_type classify_object(oop obj, bool count); size_t print(); }; // Count objects using the alloc_count field in the object's klass // object. class ClassifyInstanceKlassClosure : public ClassifyObjectClosure { private: int total_instances; public: ClassifyInstanceKlassClosure() { reset(); } void reset(); void print(); void do_object(oop obj); }; // Clear the alloc_count fields in all classes so that the count can be // restarted. class ClearAllocCountClosure : public ObjectClosure { public: void do_object(oop obj) { if (obj->is_klass()) { Klass* k = Klass::cast((klassOop)obj); k->set_alloc_count(0); } } }; #endif // SHARE_VM_MEMORY_CLASSIFY_HPP