Mercurial > hg > truffle
view src/share/vm/runtime/reflectionUtils.cpp @ 7432:0b3d19153cc6
8001028: Improve GC option handling
Summary: If there are not enough native resources to create the ReferenceHandler or Finalizer Java threads, the VM will attempt to throw an OOME before the java.lang.Class class has been initialized. This can result in assertion failures and other crashes. Move the initialization of the java.lang.Class class to just before the initialization of the java.lang.ref.Finalizer class.
Reviewed-by: jwilhelm, dholmes, coleenp
author | johnc |
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date | Wed, 12 Dec 2012 12:07:32 -0800 |
parents | da91efe96a93 |
children | e522a00b91aa ac9cb1d5a202 |
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/* * Copyright (c) 1999, 2012, 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/javaClasses.hpp" #include "memory/universe.inline.hpp" #include "runtime/reflectionUtils.hpp" KlassStream::KlassStream(instanceKlassHandle klass, bool local_only, bool classes_only) { _klass = klass; if (classes_only) { _interfaces = Universe::the_empty_klass_array(); } else { _interfaces = klass->transitive_interfaces(); } _interface_index = _interfaces->length(); _local_only = local_only; _classes_only = classes_only; } bool KlassStream::eos() { if (index() >= 0) return false; if (_local_only) return true; if (!_klass->is_interface() && _klass->super() != NULL) { // go up superclass chain (not for interfaces) _klass = _klass->super(); } else { if (_interface_index > 0) { _klass = _interfaces->at(--_interface_index); } else { return true; } } _index = length(); next(); return eos(); } GrowableArray<FilteredField*> *FilteredFieldsMap::_filtered_fields = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<FilteredField*>(3,true); void FilteredFieldsMap::initialize() { int offset; offset = java_lang_Throwable::get_backtrace_offset(); _filtered_fields->append(new FilteredField(SystemDictionary::Throwable_klass(), offset)); // The latest version of vm may be used with old jdk. if (JDK_Version::is_gte_jdk16x_version()) { // The following class fields do not exist in // previous version of jdk. offset = sun_reflect_ConstantPool::oop_offset(); _filtered_fields->append(new FilteredField(SystemDictionary::reflect_ConstantPool_klass(), offset)); offset = sun_reflect_UnsafeStaticFieldAccessorImpl::base_offset(); _filtered_fields->append(new FilteredField(SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(), offset)); } } int FilteredFieldStream::field_count() { int numflds = 0; for (;!eos(); next()) { numflds++; } return numflds; }