1 /* 2 * Copyright (c) 2015, 2018, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package java.lang; 26 27 import jdk.internal.access.JavaLangInvokeAccess; 28 import jdk.internal.access.SharedSecrets; 29 30 import java.lang.StackWalker.StackFrame; 31 import java.lang.invoke.MethodType; 32 33 class StackFrameInfo implements StackFrame { 34 private final byte RETAIN_CLASS_REF = 0x01; 35 36 private final static JavaLangInvokeAccess JLIA = 37 SharedSecrets.getJavaLangInvokeAccess(); 38 39 private final byte flags; 40 private final Object memberName; 41 private final short bci; 42 private volatile StackTraceElement ste; 43 44 /* 45 * Create StackFrameInfo for StackFrameTraverser and LiveStackFrameTraverser 46 * to use 47 */ 48 StackFrameInfo(StackWalker walker) { 49 this.flags = walker.retainClassRef ? RETAIN_CLASS_REF : 0; 50 this.bci = -1; 51 this.memberName = JLIA.newMemberName(); 52 } 53 54 // package-private called by StackStreamFactory to skip 55 // the capability check 56 Class<?> declaringClass() { 57 return JLIA.getDeclaringClass(memberName); 58 } 59 60 // ----- implementation of StackFrame methods 61 62 @Override 63 public String getClassName() { 64 return declaringClass().getName(); 65 } 66 67 @Override 68 public Class<?> getDeclaringClass() { 69 ensureRetainClassRefEnabled(); 70 return declaringClass(); | 1 /* 2 * Copyright (c) 2015, 2019, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package java.lang; 26 27 import jdk.internal.access.JavaLangInvokeAccess; 28 import jdk.internal.access.SharedSecrets; 29 import jdk.internal.vm.annotation.Stable; 30 31 import java.lang.StackWalker.StackFrame; 32 import java.lang.invoke.MethodType; 33 34 class StackFrameInfo implements StackFrame { 35 private final static byte RETAIN_CLASS_REF = 0x01; 36 37 private final static JavaLangInvokeAccess JLIA = 38 SharedSecrets.getJavaLangInvokeAccess(); 39 40 private final byte flags; 41 private final Object memberName; // MemberName initialized by VM 42 private @Stable int bci = -1; // BCI set by VM 43 private volatile StackTraceElement ste; 44 45 /* 46 * Construct an empty StackFrameInfo object that will be filled by the VM 47 * during stack walking. 48 * 49 * @see StackStreamFactory.AbstractStackWalker#callStackWalk 50 * @see StackStreamFactory.AbstractStackWalker#fetchStackFrames 51 */ 52 StackFrameInfo(StackWalker walker) { 53 this.flags = walker.retainClassRef ? RETAIN_CLASS_REF : 0; 54 this.memberName = JLIA.newMemberName(); 55 } 56 57 // package-private called by StackStreamFactory to skip 58 // the capability check 59 Class<?> declaringClass() { 60 return JLIA.getDeclaringClass(memberName); 61 } 62 63 // ----- implementation of StackFrame methods 64 65 @Override 66 public String getClassName() { 67 return declaringClass().getName(); 68 } 69 70 @Override 71 public Class<?> getDeclaringClass() { 72 ensureRetainClassRefEnabled(); 73 return declaringClass(); |