1 /*
   2  * Copyright (c) 2016, 2017, 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 package jdk.tools.jaotc;
  25 
  26 import org.graalvm.compiler.bytecode.Bytecodes;
  27 
  28 import jdk.vm.ci.code.BytecodePosition;
  29 import jdk.vm.ci.code.site.Call;
  30 import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
  31 import jdk.vm.ci.meta.ResolvedJavaMethod;
  32 
  33 final class CallInfo {
  34 
  35     static boolean isStaticCall(Call call) {
  36         if (isJavaCall(call)) {
  37             return ((getByteCode(call) & 0xFF) == Bytecodes.INVOKESTATIC);
  38         }
  39         return false;
  40     }
  41 
  42     static boolean isSpecialCall(Call call) {
  43         if (isJavaCall(call)) {
  44             return ((getByteCode(call) & 0xFF) == Bytecodes.INVOKESPECIAL);
  45         }
  46         return false;
  47     }
  48 
  49     private static boolean isInvokeVirtual(Call call) {
  50         if (isJavaCall(call)) {
  51             return ((getByteCode(call) & 0xFF) == Bytecodes.INVOKEVIRTUAL) || ((getByteCode(call) & 0xFF) == Bytecodes.INVOKEINTERFACE);
  52         }
  53         return false;
  54     }
  55 
  56     static boolean isVirtualCall(CompiledMethodInfo methodInfo, Call call) {
  57         return isInvokeVirtual(call) && !methodInfo.hasMark(call, MarkId.INVOKESPECIAL);
  58     }
  59 
  60     static boolean isOptVirtualCall(CompiledMethodInfo methodInfo, Call call) {
  61         return isInvokeVirtual(call) && methodInfo.hasMark(call, MarkId.INVOKESPECIAL);
  62     }
  63 
  64     private static boolean isJavaCall(Call call) {
  65         // If there is no associated debug info return false
  66         if (call.debugInfo == null) {
  67             return false;
  68         }
  69         BytecodePosition bcpos = call.debugInfo.getBytecodePosition();
  70         ResolvedJavaMethod method = bcpos.getMethod();
  71         // If bytecode position indicates a special value (negative value) it is
  72         // not a normal java call
  73         if (bcpos.getBCI() < 0) {
  74             return false;
  75         }
  76         // If there is no method associated with the debuginfo, return false
  77         if (method == null) {
  78             return false;
  79         }
  80         assert (method instanceof HotSpotResolvedJavaMethod) : "Not a resolved Java call";
  81         return true;
  82     }
  83 
  84     private static byte getByteCode(Call call) {
  85         ResolvedJavaMethod m = call.debugInfo.getBytecodePosition().getMethod();
  86         int callPosition = call.debugInfo.getBytecodePosition().getBCI();
  87         byte[] code = m.getCode();
  88         return code[callPosition];
  89     }
  90 
  91 }