--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/utilities/ConstantTag.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2001, 2013, 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.
+ *
+ * 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 sun.jvm.hotspot.utilities;
+
+import sun.jvm.hotspot.runtime.BasicType;
+
+public class ConstantTag {
+ // These replicated from the VM to save space
+ private static final int JVM_CONSTANT_Utf8 = 1;
+ private static final int JVM_CONSTANT_Unicode = 2; // unused
+ private static final int JVM_CONSTANT_Integer = 3;
+ private static final int JVM_CONSTANT_Float = 4;
+ private static final int JVM_CONSTANT_Long = 5;
+ private static final int JVM_CONSTANT_Double = 6;
+ private static final int JVM_CONSTANT_Class = 7;
+ private static final int JVM_CONSTANT_String = 8;
+ private static final int JVM_CONSTANT_Fieldref = 9;
+ private static final int JVM_CONSTANT_Methodref = 10;
+ private static final int JVM_CONSTANT_InterfaceMethodref = 11;
+ private static final int JVM_CONSTANT_NameAndType = 12;
+ private static final int JVM_CONSTANT_MethodHandle = 15; // JSR 292
+ private static final int JVM_CONSTANT_MethodType = 16; // JSR 292
+ // static final int JVM_CONSTANT_(unused) = 17; // JSR 292 early drafts only
+ private static final int JVM_CONSTANT_InvokeDynamic = 18; // JSR 292
+ private static final int JVM_CONSTANT_Invalid = 0; // For bad value initialization
+ private static final int JVM_CONSTANT_UnresolvedClass = 100; // Temporary tag until actual use
+ private static final int JVM_CONSTANT_ClassIndex = 101; // Temporary tag while constructing constant pool
+ private static final int JVM_CONSTANT_StringIndex = 102; // Temporary tag while constructing constant pool
+ private static final int JVM_CONSTANT_UnresolvedClassInError = 103; // Resolution failed
+ private static final int JVM_CONSTANT_MethodHandleInError = 104; // Error tag due to resolution error
+ private static final int JVM_CONSTANT_MethodTypeInError = 105; // Error tag due to resolution error
+
+ // JVM_CONSTANT_MethodHandle subtypes //FIXME: connect these to data structure
+ private static int JVM_REF_getField = 1;
+ private static int JVM_REF_getStatic = 2;
+ private static int JVM_REF_putField = 3;
+ private static int JVM_REF_putStatic = 4;
+ private static int JVM_REF_invokeVirtual = 5;
+ private static int JVM_REF_invokeStatic = 6;
+ private static int JVM_REF_invokeSpecial = 7;
+ private static int JVM_REF_newInvokeSpecial = 8;
+ private static int JVM_REF_invokeInterface = 9;
+
+ private byte tag;
+
+ public ConstantTag(byte tag) {
+ this.tag = tag;
+ }
+
+ public int value() { return tag; }
+
+ public boolean isKlass() { return tag == JVM_CONSTANT_Class; }
+ public boolean isField () { return tag == JVM_CONSTANT_Fieldref; }
+ public boolean isMethod() { return tag == JVM_CONSTANT_Methodref; }
+ public boolean isInterfaceMethod() { return tag == JVM_CONSTANT_InterfaceMethodref; }
+ public boolean isString() { return tag == JVM_CONSTANT_String; }
+ public boolean isInt() { return tag == JVM_CONSTANT_Integer; }
+ public boolean isFloat() { return tag == JVM_CONSTANT_Float; }
+ public boolean isLong() { return tag == JVM_CONSTANT_Long; }
+ public boolean isDouble() { return tag == JVM_CONSTANT_Double; }
+ public boolean isNameAndType() { return tag == JVM_CONSTANT_NameAndType; }
+ public boolean isUtf8() { return tag == JVM_CONSTANT_Utf8; }
+ public boolean isMethodHandle() { return tag == JVM_CONSTANT_MethodHandle; }
+ public boolean isMethodType() { return tag == JVM_CONSTANT_MethodType; }
+ public boolean isInvokeDynamic() { return tag == JVM_CONSTANT_InvokeDynamic; }
+
+ public boolean isInvalid() { return tag == JVM_CONSTANT_Invalid; }
+
+ public boolean isUnresolvedKlass() {
+ return tag == JVM_CONSTANT_UnresolvedClass || tag == JVM_CONSTANT_UnresolvedClassInError;
+ }
+ public boolean isUnresolveKlassInError() { return tag == JVM_CONSTANT_UnresolvedClassInError; }
+ public boolean isKlassIndex() { return tag == JVM_CONSTANT_ClassIndex; }
+ public boolean isStringIndex() { return tag == JVM_CONSTANT_StringIndex; }
+
+ public boolean isKlassReference() { return isKlassIndex() || isUnresolvedKlass(); }
+ public boolean isFieldOrMethod() { return isField() || isMethod() || isInterfaceMethod(); }
+ public boolean isSymbol() { return isUtf8(); }
+
+ public BasicType basicType() {
+ switch (tag) {
+ case JVM_CONSTANT_Integer :
+ return BasicType.T_INT;
+ case JVM_CONSTANT_Float :
+ return BasicType.T_FLOAT;
+ case JVM_CONSTANT_Long :
+ return BasicType.T_LONG;
+ case JVM_CONSTANT_Double :
+ return BasicType.T_DOUBLE;
+
+ case JVM_CONSTANT_Class :
+ case JVM_CONSTANT_String :
+ case JVM_CONSTANT_UnresolvedClass :
+ case JVM_CONSTANT_UnresolvedClassInError :
+ case JVM_CONSTANT_MethodHandleInError :
+ case JVM_CONSTANT_MethodTypeInError :
+ case JVM_CONSTANT_ClassIndex :
+ case JVM_CONSTANT_StringIndex :
+ case JVM_CONSTANT_MethodHandle :
+ case JVM_CONSTANT_MethodType :
+ return BasicType.T_OBJECT;
+ default:
+ throw new InternalError("unexpected tag: " + tag);
+ }
+ }
+
+ public String toString() {
+ return "ConstantTag:" + Integer.toString(tag);
+}
+}