581 lines
25 KiB
Java
581 lines
25 KiB
Java
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/*
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* Copyright (c) 2008, 2013, 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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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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package java.lang.invoke;
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import static java.lang.invoke.MethodHandleNatives.Constants.*;
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/**
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* The JVM interface for the method handles package is all here.
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* This is an interface internal and private to an implementation of JSR 292.
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* <em>This class is not part of the JSR 292 standard.</em>
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* @author jrose
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*/
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class MethodHandleNatives {
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// BEGIN Android-removed: Unused implementation code.
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/*
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private MethodHandleNatives() { } // static only
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/// MemberName support
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static native void init(MemberName self, Object ref);
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static native void expand(MemberName self);
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static native MemberName resolve(MemberName self, Class<?> caller) throws LinkageError, ClassNotFoundException;
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static native int getMembers(Class<?> defc, String matchName, String matchSig,
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int matchFlags, Class<?> caller, int skip, MemberName[] results);
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/// Field layout queries parallel to sun.misc.Unsafe:
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static native long objectFieldOffset(MemberName self); // e.g., returns vmindex
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static native long staticFieldOffset(MemberName self); // e.g., returns vmindex
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static native Object staticFieldBase(MemberName self); // e.g., returns clazz
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static native Object getMemberVMInfo(MemberName self); // returns {vmindex,vmtarget}
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/// MethodHandle support
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/** Fetch MH-related JVM parameter.
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* which=0 retrieves MethodHandlePushLimit
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* which=1 retrieves stack slot push size (in address units)
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*
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static native int getConstant(int which);
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static final boolean COUNT_GWT;
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/// CallSite support
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/** Tell the JVM that we need to change the target of a CallSite. *
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static native void setCallSiteTargetNormal(CallSite site, MethodHandle target);
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static native void setCallSiteTargetVolatile(CallSite site, MethodHandle target);
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private static native void registerNatives();
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static {
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registerNatives();
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COUNT_GWT = getConstant(Constants.GC_COUNT_GWT) != 0;
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// The JVM calls MethodHandleNatives.<clinit>. Cascade the <clinit> calls as needed:
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MethodHandleImpl.initStatics();
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}
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*/
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// END Android-removed: Unused implementation code.
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// All compile-time constants go here.
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// There is an opportunity to check them against the JVM's idea of them.
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static class Constants {
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Constants() { } // static only
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// BEGIN Android-removed: Unused implementation code.
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/*
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// MethodHandleImpl
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static final int // for getConstant
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GC_COUNT_GWT = 4,
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GC_LAMBDA_SUPPORT = 5;
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// MemberName
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// The JVM uses values of -2 and above for vtable indexes.
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// Field values are simple positive offsets.
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// Ref: src/share/vm/oops/methodOop.hpp
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// This value is negative enough to avoid such numbers,
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// but not too negative.
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static final int
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MN_IS_METHOD = 0x00010000, // method (not constructor)
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MN_IS_CONSTRUCTOR = 0x00020000, // constructor
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MN_IS_FIELD = 0x00040000, // field
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MN_IS_TYPE = 0x00080000, // nested type
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MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
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MN_REFERENCE_KIND_SHIFT = 24, // refKind
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MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
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// The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
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MN_SEARCH_SUPERCLASSES = 0x00100000,
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MN_SEARCH_INTERFACES = 0x00200000;
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/**
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* Basic types as encoded in the JVM. These code values are not
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* intended for use outside this class. They are used as part of
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* a private interface between the JVM and this class.
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*
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static final int
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T_BOOLEAN = 4,
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T_CHAR = 5,
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T_FLOAT = 6,
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T_DOUBLE = 7,
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T_BYTE = 8,
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T_SHORT = 9,
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T_INT = 10,
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T_LONG = 11,
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T_OBJECT = 12,
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//T_ARRAY = 13
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T_VOID = 14,
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//T_ADDRESS = 15
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T_ILLEGAL = 99;
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/**
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* Constant pool entry types.
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*
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static final byte
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CONSTANT_Utf8 = 1,
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CONSTANT_Integer = 3,
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CONSTANT_Float = 4,
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CONSTANT_Long = 5,
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CONSTANT_Double = 6,
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CONSTANT_Class = 7,
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CONSTANT_String = 8,
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CONSTANT_Fieldref = 9,
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CONSTANT_Methodref = 10,
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CONSTANT_InterfaceMethodref = 11,
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CONSTANT_NameAndType = 12,
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CONSTANT_MethodHandle = 15, // JSR 292
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CONSTANT_MethodType = 16, // JSR 292
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CONSTANT_InvokeDynamic = 18,
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CONSTANT_LIMIT = 19; // Limit to tags found in classfiles
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/**
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* Access modifier flags.
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*
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static final char
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ACC_PUBLIC = 0x0001,
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ACC_PRIVATE = 0x0002,
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ACC_PROTECTED = 0x0004,
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ACC_STATIC = 0x0008,
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ACC_FINAL = 0x0010,
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ACC_SYNCHRONIZED = 0x0020,
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ACC_VOLATILE = 0x0040,
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ACC_TRANSIENT = 0x0080,
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ACC_NATIVE = 0x0100,
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ACC_INTERFACE = 0x0200,
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ACC_ABSTRACT = 0x0400,
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ACC_STRICT = 0x0800,
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ACC_SYNTHETIC = 0x1000,
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ACC_ANNOTATION = 0x2000,
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ACC_ENUM = 0x4000,
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// aliases:
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ACC_SUPER = ACC_SYNCHRONIZED,
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ACC_BRIDGE = ACC_VOLATILE,
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ACC_VARARGS = ACC_TRANSIENT;
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*/
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// END Android-removed: Unused implementation code.
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/**
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* Constant pool reference-kind codes, as used by CONSTANT_MethodHandle CP entries.
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*/
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static final byte
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REF_NONE = 0, // null value
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REF_getField = 1,
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REF_getStatic = 2,
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REF_putField = 3,
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REF_putStatic = 4,
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REF_invokeVirtual = 5,
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REF_invokeStatic = 6,
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REF_invokeSpecial = 7,
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REF_newInvokeSpecial = 8,
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REF_invokeInterface = 9,
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REF_LIMIT = 10;
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}
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static boolean refKindIsValid(int refKind) {
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return (refKind > REF_NONE && refKind < REF_LIMIT);
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}
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static boolean refKindIsField(byte refKind) {
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assert(refKindIsValid(refKind));
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return (refKind <= REF_putStatic);
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}
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// BEGIN Android-removed: Unused implementation code.
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/*
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static boolean refKindIsGetter(byte refKind) {
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assert(refKindIsValid(refKind));
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return (refKind <= REF_getStatic);
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}
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static boolean refKindIsSetter(byte refKind) {
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return refKindIsField(refKind) && !refKindIsGetter(refKind);
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}
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static boolean refKindIsMethod(byte refKind) {
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return !refKindIsField(refKind) && (refKind != REF_newInvokeSpecial);
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}
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static boolean refKindIsConstructor(byte refKind) {
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return (refKind == REF_newInvokeSpecial);
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}
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static boolean refKindHasReceiver(byte refKind) {
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assert(refKindIsValid(refKind));
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return (refKind & 1) != 0;
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}
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static boolean refKindIsStatic(byte refKind) {
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return !refKindHasReceiver(refKind) && (refKind != REF_newInvokeSpecial);
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}
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static boolean refKindDoesDispatch(byte refKind) {
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assert(refKindIsValid(refKind));
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return (refKind == REF_invokeVirtual ||
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refKind == REF_invokeInterface);
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}
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static {
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final int HR_MASK = ((1 << REF_getField) |
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(1 << REF_putField) |
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(1 << REF_invokeVirtual) |
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(1 << REF_invokeSpecial) |
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(1 << REF_invokeInterface)
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);
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for (byte refKind = REF_NONE+1; refKind < REF_LIMIT; refKind++) {
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assert(refKindHasReceiver(refKind) == (((1<<refKind) & HR_MASK) != 0)) : refKind;
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}
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}
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*/
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// END Android-removed: Unused implementation code.
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static String refKindName(byte refKind) {
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assert(refKindIsValid(refKind));
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switch (refKind) {
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case REF_getField: return "getField";
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case REF_getStatic: return "getStatic";
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case REF_putField: return "putField";
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case REF_putStatic: return "putStatic";
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case REF_invokeVirtual: return "invokeVirtual";
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case REF_invokeStatic: return "invokeStatic";
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case REF_invokeSpecial: return "invokeSpecial";
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case REF_newInvokeSpecial: return "newInvokeSpecial";
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case REF_invokeInterface: return "invokeInterface";
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default: return "REF_???";
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}
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}
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// BEGIN Android-removed: Unused implementation code.
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/*
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private static native int getNamedCon(int which, Object[] name);
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static boolean verifyConstants() {
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Object[] box = { null };
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for (int i = 0; ; i++) {
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box[0] = null;
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int vmval = getNamedCon(i, box);
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if (box[0] == null) break;
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String name = (String) box[0];
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try {
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Field con = Constants.class.getDeclaredField(name);
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int jval = con.getInt(null);
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if (jval == vmval) continue;
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String err = (name+": JVM has "+vmval+" while Java has "+jval);
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if (name.equals("CONV_OP_LIMIT")) {
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System.err.println("warning: "+err);
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continue;
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}
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throw new InternalError(err);
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} catch (NoSuchFieldException | IllegalAccessException ex) {
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String err = (name+": JVM has "+vmval+" which Java does not define");
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// ignore exotic ops the JVM cares about; we just wont issue them
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//System.err.println("warning: "+err);
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continue;
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}
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}
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return true;
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}
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static {
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assert(verifyConstants());
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}
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// Up-calls from the JVM.
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// These must NOT be public.
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/**
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* The JVM is linking an invokedynamic instruction. Create a reified call site for it.
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*
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static MemberName linkCallSite(Object callerObj,
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Object bootstrapMethodObj,
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Object nameObj, Object typeObj,
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Object staticArguments,
|
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|
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Object[] appendixResult) {
|
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MethodHandle bootstrapMethod = (MethodHandle)bootstrapMethodObj;
|
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Class<?> caller = (Class<?>)callerObj;
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String name = nameObj.toString().intern();
|
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MethodType type = (MethodType)typeObj;
|
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if (!TRACE_METHOD_LINKAGE)
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return linkCallSiteImpl(caller, bootstrapMethod, name, type,
|
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staticArguments, appendixResult);
|
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return linkCallSiteTracing(caller, bootstrapMethod, name, type,
|
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staticArguments, appendixResult);
|
||
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}
|
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|
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static MemberName linkCallSiteImpl(Class<?> caller,
|
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MethodHandle bootstrapMethod,
|
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String name, MethodType type,
|
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|
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Object staticArguments,
|
||
|
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Object[] appendixResult) {
|
||
|
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CallSite callSite = CallSite.makeSite(bootstrapMethod,
|
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name,
|
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|
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type,
|
||
|
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staticArguments,
|
||
|
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caller);
|
||
|
|
if (callSite instanceof ConstantCallSite) {
|
||
|
|
appendixResult[0] = callSite.dynamicInvoker();
|
||
|
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return Invokers.linkToTargetMethod(type);
|
||
|
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} else {
|
||
|
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appendixResult[0] = callSite;
|
||
|
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return Invokers.linkToCallSiteMethod(type);
|
||
|
|
}
|
||
|
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}
|
||
|
|
// Tracing logic:
|
||
|
|
static MemberName linkCallSiteTracing(Class<?> caller,
|
||
|
|
MethodHandle bootstrapMethod,
|
||
|
|
String name, MethodType type,
|
||
|
|
Object staticArguments,
|
||
|
|
Object[] appendixResult) {
|
||
|
|
Object bsmReference = bootstrapMethod.internalMemberName();
|
||
|
|
if (bsmReference == null) bsmReference = bootstrapMethod;
|
||
|
|
Object staticArglist = (staticArguments instanceof Object[] ?
|
||
|
|
java.util.Arrays.asList((Object[]) staticArguments) :
|
||
|
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staticArguments);
|
||
|
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System.out.println("linkCallSite "+caller.getName()+" "+
|
||
|
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bsmReference+" "+
|
||
|
|
name+type+"/"+staticArglist);
|
||
|
|
try {
|
||
|
|
MemberName res = linkCallSiteImpl(caller, bootstrapMethod, name, type,
|
||
|
|
staticArguments, appendixResult);
|
||
|
|
System.out.println("linkCallSite => "+res+" + "+appendixResult[0]);
|
||
|
|
return res;
|
||
|
|
} catch (Throwable ex) {
|
||
|
|
System.out.println("linkCallSite => throw "+ex);
|
||
|
|
throw ex;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The JVM wants a pointer to a MethodType. Oblige it by finding or creating one.
|
||
|
|
*
|
||
|
|
static MethodType findMethodHandleType(Class<?> rtype, Class<?>[] ptypes) {
|
||
|
|
return MethodType.makeImpl(rtype, ptypes, true);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The JVM wants to link a call site that requires a dynamic type check.
|
||
|
|
* Name is a type-checking invoker, invokeExact or invoke.
|
||
|
|
* Return a JVM method (MemberName) to handle the invoking.
|
||
|
|
* The method assumes the following arguments on the stack:
|
||
|
|
* 0: the method handle being invoked
|
||
|
|
* 1-N: the arguments to the method handle invocation
|
||
|
|
* N+1: an optional, implicitly added argument (typically the given MethodType)
|
||
|
|
* <p>
|
||
|
|
* The nominal method at such a call site is an instance of
|
||
|
|
* a signature-polymorphic method (see @PolymorphicSignature).
|
||
|
|
* Such method instances are user-visible entities which are
|
||
|
|
* "split" from the generic placeholder method in {@code MethodHandle}.
|
||
|
|
* (Note that the placeholder method is not identical with any of
|
||
|
|
* its instances. If invoked reflectively, is guaranteed to throw an
|
||
|
|
* {@code UnsupportedOperationException}.)
|
||
|
|
* If the signature-polymorphic method instance is ever reified,
|
||
|
|
* it appears as a "copy" of the original placeholder
|
||
|
|
* (a native final member of {@code MethodHandle}) except
|
||
|
|
* that its type descriptor has shape required by the instance,
|
||
|
|
* and the method instance is <em>not</em> varargs.
|
||
|
|
* The method instance is also marked synthetic, since the
|
||
|
|
* method (by definition) does not appear in Java source code.
|
||
|
|
* <p>
|
||
|
|
* The JVM is allowed to reify this method as instance metadata.
|
||
|
|
* For example, {@code invokeBasic} is always reified.
|
||
|
|
* But the JVM may instead call {@code linkMethod}.
|
||
|
|
* If the result is an * ordered pair of a {@code (method, appendix)},
|
||
|
|
* the method gets all the arguments (0..N inclusive)
|
||
|
|
* plus the appendix (N+1), and uses the appendix to complete the call.
|
||
|
|
* In this way, one reusable method (called a "linker method")
|
||
|
|
* can perform the function of any number of polymorphic instance
|
||
|
|
* methods.
|
||
|
|
* <p>
|
||
|
|
* Linker methods are allowed to be weakly typed, with any or
|
||
|
|
* all references rewritten to {@code Object} and any primitives
|
||
|
|
* (except {@code long}/{@code float}/{@code double})
|
||
|
|
* rewritten to {@code int}.
|
||
|
|
* A linker method is trusted to return a strongly typed result,
|
||
|
|
* according to the specific method type descriptor of the
|
||
|
|
* signature-polymorphic instance it is emulating.
|
||
|
|
* This can involve (as necessary) a dynamic check using
|
||
|
|
* data extracted from the appendix argument.
|
||
|
|
* <p>
|
||
|
|
* The JVM does not inspect the appendix, other than to pass
|
||
|
|
* it verbatim to the linker method at every call.
|
||
|
|
* This means that the JDK runtime has wide latitude
|
||
|
|
* for choosing the shape of each linker method and its
|
||
|
|
* corresponding appendix.
|
||
|
|
* Linker methods should be generated from {@code LambdaForm}s
|
||
|
|
* so that they do not become visible on stack traces.
|
||
|
|
* <p>
|
||
|
|
* The {@code linkMethod} call is free to omit the appendix
|
||
|
|
* (returning null) and instead emulate the required function
|
||
|
|
* completely in the linker method.
|
||
|
|
* As a corner case, if N==255, no appendix is possible.
|
||
|
|
* In this case, the method returned must be custom-generated to
|
||
|
|
* to perform any needed type checking.
|
||
|
|
* <p>
|
||
|
|
* If the JVM does not reify a method at a call site, but instead
|
||
|
|
* calls {@code linkMethod}, the corresponding call represented
|
||
|
|
* in the bytecodes may mention a valid method which is not
|
||
|
|
* representable with a {@code MemberName}.
|
||
|
|
* Therefore, use cases for {@code linkMethod} tend to correspond to
|
||
|
|
* special cases in reflective code such as {@code findVirtual}
|
||
|
|
* or {@code revealDirect}.
|
||
|
|
*
|
||
|
|
static MemberName linkMethod(Class<?> callerClass, int refKind,
|
||
|
|
Class<?> defc, String name, Object type,
|
||
|
|
Object[] appendixResult) {
|
||
|
|
if (!TRACE_METHOD_LINKAGE)
|
||
|
|
return linkMethodImpl(callerClass, refKind, defc, name, type, appendixResult);
|
||
|
|
return linkMethodTracing(callerClass, refKind, defc, name, type, appendixResult);
|
||
|
|
}
|
||
|
|
static MemberName linkMethodImpl(Class<?> callerClass, int refKind,
|
||
|
|
Class<?> defc, String name, Object type,
|
||
|
|
Object[] appendixResult) {
|
||
|
|
try {
|
||
|
|
if (defc == MethodHandle.class && refKind == REF_invokeVirtual) {
|
||
|
|
return Invokers.methodHandleInvokeLinkerMethod(name, fixMethodType(callerClass, type), appendixResult);
|
||
|
|
}
|
||
|
|
} catch (Throwable ex) {
|
||
|
|
if (ex instanceof LinkageError)
|
||
|
|
throw (LinkageError) ex;
|
||
|
|
else
|
||
|
|
throw new LinkageError(ex.getMessage(), ex);
|
||
|
|
}
|
||
|
|
throw new LinkageError("no such method "+defc.getName()+"."+name+type);
|
||
|
|
}
|
||
|
|
private static MethodType fixMethodType(Class<?> callerClass, Object type) {
|
||
|
|
if (type instanceof MethodType)
|
||
|
|
return (MethodType) type;
|
||
|
|
else
|
||
|
|
return MethodType.fromMethodDescriptorString((String)type, callerClass.getClassLoader());
|
||
|
|
}
|
||
|
|
// Tracing logic:
|
||
|
|
static MemberName linkMethodTracing(Class<?> callerClass, int refKind,
|
||
|
|
Class<?> defc, String name, Object type,
|
||
|
|
Object[] appendixResult) {
|
||
|
|
System.out.println("linkMethod "+defc.getName()+"."+
|
||
|
|
name+type+"/"+Integer.toHexString(refKind));
|
||
|
|
try {
|
||
|
|
MemberName res = linkMethodImpl(callerClass, refKind, defc, name, type, appendixResult);
|
||
|
|
System.out.println("linkMethod => "+res+" + "+appendixResult[0]);
|
||
|
|
return res;
|
||
|
|
} catch (Throwable ex) {
|
||
|
|
System.out.println("linkMethod => throw "+ex);
|
||
|
|
throw ex;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The JVM is resolving a CONSTANT_MethodHandle CP entry. And it wants our help.
|
||
|
|
* It will make an up-call to this method. (Do not change the name or signature.)
|
||
|
|
* The type argument is a Class for field requests and a MethodType for non-fields.
|
||
|
|
* <p>
|
||
|
|
* Recent versions of the JVM may also pass a resolved MemberName for the type.
|
||
|
|
* In that case, the name is ignored and may be null.
|
||
|
|
*
|
||
|
|
static MethodHandle linkMethodHandleConstant(Class<?> callerClass, int refKind,
|
||
|
|
Class<?> defc, String name, Object type) {
|
||
|
|
try {
|
||
|
|
Lookup lookup = IMPL_LOOKUP.in(callerClass);
|
||
|
|
assert(refKindIsValid(refKind));
|
||
|
|
return lookup.linkMethodHandleConstant((byte) refKind, defc, name, type);
|
||
|
|
} catch (IllegalAccessException ex) {
|
||
|
|
Throwable cause = ex.getCause();
|
||
|
|
if (cause instanceof AbstractMethodError) {
|
||
|
|
throw (AbstractMethodError) cause;
|
||
|
|
} else {
|
||
|
|
Error err = new IllegalAccessError(ex.getMessage());
|
||
|
|
throw initCauseFrom(err, ex);
|
||
|
|
}
|
||
|
|
} catch (NoSuchMethodException ex) {
|
||
|
|
Error err = new NoSuchMethodError(ex.getMessage());
|
||
|
|
throw initCauseFrom(err, ex);
|
||
|
|
} catch (NoSuchFieldException ex) {
|
||
|
|
Error err = new NoSuchFieldError(ex.getMessage());
|
||
|
|
throw initCauseFrom(err, ex);
|
||
|
|
} catch (ReflectiveOperationException ex) {
|
||
|
|
Error err = new IncompatibleClassChangeError();
|
||
|
|
throw initCauseFrom(err, ex);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
// END Android-removed: Unused implementation code.
|
||
|
|
|
||
|
|
// BEGIN Android-added: Add mapLookupExceptionToError(ex) from OpenJDK 17. http://b/270028670
|
||
|
|
/**
|
||
|
|
* Map a reflective exception to a linkage error.
|
||
|
|
*/
|
||
|
|
static LinkageError mapLookupExceptionToError(ReflectiveOperationException ex) {
|
||
|
|
LinkageError err;
|
||
|
|
if (ex instanceof IllegalAccessException) {
|
||
|
|
Throwable cause = ex.getCause();
|
||
|
|
if (cause instanceof AbstractMethodError) {
|
||
|
|
return (AbstractMethodError) cause;
|
||
|
|
} else {
|
||
|
|
err = new IllegalAccessError(ex.getMessage());
|
||
|
|
}
|
||
|
|
} else if (ex instanceof NoSuchMethodException) {
|
||
|
|
err = new NoSuchMethodError(ex.getMessage());
|
||
|
|
} else if (ex instanceof NoSuchFieldException) {
|
||
|
|
err = new NoSuchFieldError(ex.getMessage());
|
||
|
|
} else {
|
||
|
|
err = new IncompatibleClassChangeError();
|
||
|
|
}
|
||
|
|
return initCauseFrom(err, ex);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Use best possible cause for err.initCause(), substituting the
|
||
|
|
* cause for err itself if the cause has the same (or better) type.
|
||
|
|
*/
|
||
|
|
static <E extends Error> E initCauseFrom(E err, Exception ex) {
|
||
|
|
Throwable th = ex.getCause();
|
||
|
|
@SuppressWarnings("unchecked")
|
||
|
|
final Class<E> Eclass = (Class<E>) err.getClass();
|
||
|
|
if (Eclass.isInstance(th))
|
||
|
|
return Eclass.cast(th);
|
||
|
|
err.initCause(th == null ? ex : th);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
// END Android-added: Add mapLookupExceptionToError(ex) from OpenJDK 17. http://b/270028670
|
||
|
|
|
||
|
|
// BEGIN Android-removed: Unused implementation code.
|
||
|
|
/**
|
||
|
|
* Is this method a caller-sensitive method?
|
||
|
|
* I.e., does it call Reflection.getCallerClass or a similer method
|
||
|
|
* to ask about the identity of its caller?
|
||
|
|
*
|
||
|
|
static boolean isCallerSensitive(MemberName mem) {
|
||
|
|
if (!mem.isInvocable()) return false; // fields are not caller sensitive
|
||
|
|
|
||
|
|
return mem.isCallerSensitive() || canBeCalledVirtual(mem);
|
||
|
|
}
|
||
|
|
|
||
|
|
static boolean canBeCalledVirtual(MemberName mem) {
|
||
|
|
assert(mem.isInvocable());
|
||
|
|
Class<?> defc = mem.getDeclaringClass();
|
||
|
|
switch (mem.getName()) {
|
||
|
|
case "checkMemberAccess":
|
||
|
|
return canBeCalledVirtual(mem, java.lang.SecurityManager.class);
|
||
|
|
case "getContextClassLoader":
|
||
|
|
return canBeCalledVirtual(mem, java.lang.Thread.class);
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
static boolean canBeCalledVirtual(MemberName symbolicRef, Class<?> definingClass) {
|
||
|
|
Class<?> symbolicRefClass = symbolicRef.getDeclaringClass();
|
||
|
|
if (symbolicRefClass == definingClass) return true;
|
||
|
|
if (symbolicRef.isStatic() || symbolicRef.isPrivate()) return false;
|
||
|
|
return (definingClass.isAssignableFrom(symbolicRefClass) || // Msym overrides Mdef
|
||
|
|
symbolicRefClass.isInterface()); // Mdef implements Msym
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
// END Android-removed: Unused implementation code.
|
||
|
|
}
|