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8268829: Provide an optimized way to walk the stack with Class object only

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8210375: StackWalker::getCallerClass throws UnsupportedOperationException

Reviewed-by: coleenp, dfuchs, bchristi
This commit is contained in:
Mandy Chung 2023-09-07 21:37:40 +00:00
parent 716201c77d
commit 111ecdbaf5
34 changed files with 982 additions and 622 deletions
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5
src/java.base/share/classes/java/lang/invoke/MemberName.java
View file

@ -65,11 +65,6 @@ import static java.lang.invoke.MethodHandleStatics.newInternalError;
* and those seven fields omit much of the information in Method.
* @author jrose
*/
/*non-public*/
final class ResolvedMethodName {
//@Injected JVM_Method* vmtarget;
//@Injected Class<?> vmholder;
}
/*non-public*/
final class MemberName implements Member, Cloneable {

35
src/java.base/share/classes/java/lang/invoke/MethodHandleImpl.java
View file

@ -57,6 +57,8 @@ import java.util.function.Function;
import java.util.stream.Stream;
import static java.lang.invoke.LambdaForm.*;
import static java.lang.invoke.MethodHandleNatives.Constants.MN_CALLER_SENSITIVE;
import static java.lang.invoke.MethodHandleNatives.Constants.MN_HIDDEN_MEMBER;
import static java.lang.invoke.MethodHandleStatics.*;
import static java.lang.invoke.MethodHandles.Lookup.IMPL_LOOKUP;
import static java.lang.invoke.MethodHandles.Lookup.ClassOption.NESTMATE;
@ -1543,37 +1545,22 @@ abstract class MethodHandleImpl {
static {
SharedSecrets.setJavaLangInvokeAccess(new JavaLangInvokeAccess() {
@Override
public Object newMemberName() {
return new MemberName();
public Class<?> getDeclaringClass(Object rmname) {
ResolvedMethodName method = (ResolvedMethodName)rmname;
return method.declaringClass();
}
@Override
public String getName(Object mname) {
MemberName memberName = (MemberName)mname;
return memberName.getName();
}
@Override
public Class<?> getDeclaringClass(Object mname) {
MemberName memberName = (MemberName)mname;
return memberName.getDeclaringClass();
public MethodType getMethodType(String descriptor, ClassLoader loader) {
return MethodType.fromDescriptor(descriptor, loader);
}
@Override
public MethodType getMethodType(Object mname) {
MemberName memberName = (MemberName)mname;
return memberName.getMethodType();
public boolean isCallerSensitive(int flags) {
return (flags & MN_CALLER_SENSITIVE) == MN_CALLER_SENSITIVE;
}
@Override
public String getMethodDescriptor(Object mname) {
MemberName memberName = (MemberName)mname;
return memberName.getMethodDescriptor();
}
@Override
public boolean isNative(Object mname) {
MemberName memberName = (MemberName)mname;
return memberName.isNative();
public boolean isHiddenMember(int flags) {
return (flags & MN_HIDDEN_MEMBER) == MN_HIDDEN_MEMBER;
}
@Override

1
src/java.base/share/classes/java/lang/invoke/MethodHandleNatives.java
View file

@ -116,6 +116,7 @@ class MethodHandleNatives {
MN_IS_TYPE = 0x00080000, // nested type
MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
MN_TRUSTED_FINAL = 0x00200000, // trusted final field
MN_HIDDEN_MEMBER = 0x00400000, // members defined in a hidden class or with @Hidden
MN_REFERENCE_KIND_SHIFT = 24, // refKind
MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT;

35
src/java.base/share/classes/java/lang/invoke/ResolvedMethodName.java Normal file
View file

@ -0,0 +1,35 @@
/*
* Copyright (c) 2023, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
package java.lang.invoke;
final class ResolvedMethodName {
//@Injected JVM_Method* vmtarget;
private Class<?> vmholder;
Class<?> declaringClass() {
return vmholder;
}
}