| /* |
| * Copyright (c) 2015, 2019, 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; |
| |
| |
| import java.lang.StackWalker.StackFrame; |
| import java.lang.invoke.MethodType; |
| |
| class StackFrameInfo implements StackFrame { |
| |
| // Android-removed: libcore doesn't have JavaLangInvokeAccess yet. |
| // private static final JavaLangInvokeAccess JLIA = |
| // SharedSecrets.getJavaLangInvokeAccess(); |
| |
| private final boolean retainClassRef; |
| // Android-removed: Unused internal fields. |
| // private final Object memberName; // MemberName initialized by VM |
| private int bci; // initialized by VM to >= 0 |
| private volatile StackTraceElement ste; |
| |
| // Android-added: Add Android-specific internal fields. |
| private Class<?> declaringClass; // initialized by VM |
| private MethodType methodType; // initialized by VM |
| private String methodName; // initialized by VM |
| private String fileName; // initialized by VM |
| private int lineNumber; // initialized by VM |
| |
| /* |
| * Construct an empty StackFrameInfo object that will be filled by the VM |
| * during stack walking. |
| * |
| * @see StackStreamFactory.AbstractStackWalker#callStackWalk |
| * @see StackStreamFactory.AbstractStackWalker#fetchStackFrames |
| */ |
| StackFrameInfo(StackWalker walker) { |
| this.retainClassRef = walker.retainClassRef; |
| // Android-removed: Unused internal fields. |
| // this.memberName = JLIA.newMemberName(); |
| } |
| |
| // Android-added: Additional constructor |
| StackFrameInfo(boolean retainClassRef) { |
| this.retainClassRef = retainClassRef; |
| } |
| |
| |
| // package-private called by StackStreamFactory to skip |
| // the capability check |
| Class<?> declaringClass() { |
| // Android-changed: Android own implementation. |
| // return JLIA.getDeclaringClass(memberName); |
| return declaringClass; |
| } |
| |
| // ----- implementation of StackFrame methods |
| |
| @Override |
| public String getClassName() { |
| return declaringClass().getName(); |
| } |
| |
| @Override |
| public Class<?> getDeclaringClass() { |
| ensureRetainClassRefEnabled(); |
| return declaringClass(); |
| } |
| |
| @Override |
| public String getMethodName() { |
| // Android-changed: Android own implementation. |
| // return JLIA.getName(memberName); |
| return methodName; |
| } |
| |
| @Override |
| public MethodType getMethodType() { |
| ensureRetainClassRefEnabled(); |
| // Android-changed: Android own implementation. |
| // return JLIA.getMethodType(memberName); |
| return methodType; |
| } |
| |
| @Override |
| public String getDescriptor() { |
| // Android-changed: Android own implementation. |
| // return JLIA.getMethodDescriptor(memberName); |
| return methodType.toMethodDescriptorString(); |
| } |
| |
| @Override |
| public int getByteCodeIndex() { |
| // bci not available for native methods |
| if (isNativeMethod()) |
| return -1; |
| |
| return bci; |
| } |
| |
| @Override |
| public String getFileName() { |
| // Android-changed: Android own implementation. |
| // return toStackTraceElement().getFileName(); |
| return fileName; |
| } |
| |
| @Override |
| public int getLineNumber() { |
| // line number not available for native methods |
| if (isNativeMethod()) |
| return -2; |
| |
| // Android-changed: Android own implementation. |
| // return toStackTraceElement().getLineNumber(); |
| return lineNumber; |
| } |
| |
| |
| @Override |
| public boolean isNativeMethod() { |
| // Android-changed: Android own implementation. |
| // return JLIA.isNative(memberName); |
| // StackTraceElement.isNativeMethod() uses -2 in line number to indicate native method. |
| return lineNumber == -2; |
| } |
| |
| @Override |
| public String toString() { |
| return toStackTraceElement().toString(); |
| } |
| |
| @Override |
| public StackTraceElement toStackTraceElement() { |
| StackTraceElement s = ste; |
| if (s == null) { |
| synchronized (this) { |
| s = ste; |
| if (s == null) { |
| ste = s = StackTraceElement.of(this); |
| } |
| } |
| } |
| return s; |
| } |
| |
| private void ensureRetainClassRefEnabled() { |
| if (!retainClassRef) { |
| throw new UnsupportedOperationException("No access to RETAIN_CLASS_REFERENCE"); |
| } |
| } |
| } |