jdk8-mips64-public/hotspot: src/share/vm/runtime/reflectionUtils.cpp@d13d7aba8c12

8023657: New type profiling points: arguments to call
Summary: x86 interpreter and c1 type profiling for arguments at calls
Reviewed-by: kvn, twisti

     1 /*

     2  * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #include "precompiled.hpp"

    26 #include "classfile/javaClasses.hpp"

    27 #include "memory/universe.inline.hpp"

    28 #include "runtime/reflectionUtils.hpp"

    30 KlassStream::KlassStream(instanceKlassHandle klass, bool local_only, bool classes_only) {

    31   _klass = klass;

    32   if (classes_only) {

    33     _interfaces = Universe::the_empty_klass_array();

    34   } else {

    35     _interfaces = klass->transitive_interfaces();

    36   }

    37   _interface_index = _interfaces->length();

    38   _local_only = local_only;

    39   _classes_only = classes_only;

    40 }

    42 bool KlassStream::eos() {

    43   if (index() >= 0) return false;

    44   if (_local_only) return true;

    45   if (!_klass->is_interface() && _klass->super() != NULL) {

    46     // go up superclass chain (not for interfaces)

    47     _klass = _klass->super();

    48   } else {

    49     if (_interface_index > 0) {

    50       _klass = _interfaces->at(--_interface_index);

    51     } else {

    52       return true;

    53     }

    54   }

    55   _index = length();

    56   next();

    57   return eos();

    58 }

    61 GrowableArray<FilteredField*> *FilteredFieldsMap::_filtered_fields =

    62   new (ResourceObj::C_HEAP, mtInternal) GrowableArray<FilteredField*>(3,true);

    65 void FilteredFieldsMap::initialize() {

    66   int offset;

    67   offset = java_lang_Throwable::get_backtrace_offset();

    68   _filtered_fields->append(new FilteredField(SystemDictionary::Throwable_klass(), offset));

    69   // The latest version of vm may be used with old jdk.

    70   if (JDK_Version::is_gte_jdk16x_version()) {

    71     // The following class fields do not exist in

    72     // previous version of jdk.

    73     offset = sun_reflect_ConstantPool::oop_offset();

    74     _filtered_fields->append(new FilteredField(SystemDictionary::reflect_ConstantPool_klass(), offset));

    75     offset = sun_reflect_UnsafeStaticFieldAccessorImpl::base_offset();

    76     _filtered_fields->append(new FilteredField(SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(), offset));

    77   }

    78 }

    80 int FilteredFieldStream::field_count() {

    81   int numflds = 0;

    82   for (;!eos(); next()) {

    83     numflds++;

    84   }

    85   return numflds;

    86 }

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