1 /*
   2  * Copyright (c) 2016, 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 
  26 package jdk.jfr.internal;
  27 
  28 import jdk.internal.org.objectweb.asm.commons.Method;
  29 import jdk.jfr.internal.EventInstrumentation.FieldInfo;
  30 
  31 public enum EventWriterMethod {
  32 
  33     BEGIN_EVENT("(" + jdk.internal.org.objectweb.asm.Type.getType(PlatformEventType.class).getDescriptor() + ")Z", "???", "beginEvent"),
  34     END_EVENT("()Z", "???", "endEvent"),
  35     PUT_BYTE("(B)V", "byte", "putByte"),
  36     PUT_SHORT("(S)V", "short", "putShort"),
  37     PUT_INT("(I)V", "int", "putInt"),
  38     PUT_LONG("(J)V", "long", "putLong"),
  39     PUT_FLOAT("(F)V", "float", "putFloat"),
  40     PUT_DOUBLE("(D)V", "double", "putDouble"),
  41     PUT_CHAR("(C)V", "char", "putChar"),
  42     PUT_BOOLEAN("(Z)V", "boolean", "putBoolean"),
  43     PUT_THREAD("(Ljava/lang/Thread;)V", Type.THREAD.getName(), "putThread"),
  44     PUT_CLASS("(Ljava/lang/Class;)V", Type.CLASS.getName(), "putClass"),
  45     PUT_STRING("(Ljava/lang/String;Ljdk/jfr/internal/StringPool;)V", Type.STRING.getName(), "putString"),
  46     PUT_EVENT_THREAD("()V", Type.THREAD.getName(), "putEventThread"),
  47     PUT_STACK_TRACE("()V", Type.ORACLE_TYPE_PREFIX + "StackTrace", "putStackTrace");
  48 
  49     private final Method asmMethod;
  50     private final String typeDescriptor;
  51 
  52     EventWriterMethod(String paramSignature, String typeName, String methodName) {
  53         this.typeDescriptor = ASMToolkit.getDescriptor(typeName);
  54         this.asmMethod = new Method(methodName, paramSignature);
  55     }
  56 
  57     public Method asASM() {
  58         return asmMethod;
  59     }
  60 
  61     /**
  62      * Return method in {@link EventWriter} class to use when writing event of
  63      * a certain type.
  64      *
  65      * @param v field info
  66      *
  67      * @return the method
  68      */
  69     public static EventWriterMethod lookupMethod(FieldInfo v) {
  70         // event thread
  71         if (v.fieldName.equals(EventInstrumentation.FIELD_EVENT_THREAD)) {
  72             return EventWriterMethod.PUT_EVENT_THREAD;
  73         }
  74         for (EventWriterMethod m : EventWriterMethod.values()) {
  75             if (v.fieldDescriptor.equals(m.typeDescriptor)) {
  76                 return m;
  77             }
  78         }
  79         throw new Error("Unknown type " + v.fieldDescriptor);
  80     }
  81 }