1 files changed, 245 insertions, 0 deletions

diff --git a/OpenSim/Region/ScriptEngine/YEngine/MMRScriptObjCode.cs b/OpenSim/Region/ScriptEngine/YEngine/MMRScriptObjCode.cs
new file mode 100644
index 0000000..d5b08f0
--- /dev/null
+++ b/OpenSim/Region/ScriptEngine/YEngine/MMRScriptObjCode.cs
@@ -0,0 +1,245 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using OpenSim.Region.ScriptEngine.Yengine;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Reflection;
+using System.Reflection.Emit;
+
+namespace OpenSim.Region.ScriptEngine.Yengine
+{
+    public delegate void ScriptEventHandler(XMRInstAbstract instance);
+
+    /*
+     * This object represents the output of the compilation.
+     * Once the compilation is complete, its contents should be
+     * considered 'read-only', so it can be shared among multiple
+     * instances of the script.
+     *
+     * It gets created by ScriptCodeGen.
+     * It gets used by XMRInstance to create script instances.
+     */
+    public class ScriptObjCode
+    {
+        public string sourceHash;         // source text hash code
+        public XMRInstArSizes glblSizes = new XMRInstArSizes();
+        // number of global variables of various types
+
+        public string[] stateNames;       // convert state number to corresponding string
+        public ScriptEventHandler[,] scriptEventHandlerTable;
+        // entrypoints to all event handler functions
+        // 1st subscript = state code number (0=default)
+        // 2nd subscript = event code number
+        // null entry means no handler defined for that state,event
+
+        public Dictionary<string, TokenDeclSDType> sdObjTypesName;
+        // all script-defined types by name
+
+        public TokenDeclSDType[] sdObjTypesIndx;
+        // all script-defined types by sdTypeIndex
+
+        public Dictionary<Type, string> sdDelTypes;
+        // all script-defined delegates (including anonymous)
+
+        public Dictionary<string, DynamicMethod> dynamicMethods;
+        // all dyanmic methods
+
+        public Dictionary<string, KeyValuePair<int, ScriptSrcLoc>[]> scriptSrcLocss;
+        // method,iloffset -> source file,line,posn
+
+        public int refCount;              // used by engine to keep track of number of 
+                                          // instances that are using this object code
+
+        public Dictionary<string, Dictionary<int, string>> globalVarNames = new Dictionary<string, Dictionary<int, string>>();
+
+        /**
+         * @brief Fill in ScriptObjCode from an YEngine object file.
+         *   'objFileReader' is a serialized form of the CIL code we generated
+         *   'asmFileWriter' is where we write the disassembly to (or null if not wanted)
+         *   'srcFileWriter' is where we write the decompilation to (or null if not wanted)
+         * Throws an exception if there is any error (theoretically).
+         */
+        public ScriptObjCode(BinaryReader objFileReader, TextWriter asmFileWriter, TextWriter srcFileWriter)
+        {
+            /*
+             * Check version number to make sure we know how to process file contents.
+             */
+            char[] ocm = objFileReader.ReadChars(ScriptCodeGen.OBJECT_CODE_MAGIC.Length);
+            if(new String(ocm) != ScriptCodeGen.OBJECT_CODE_MAGIC)
+                throw new Exception("not an XMR object file (bad magic)");
+
+            int cvv = objFileReader.ReadInt32();
+            if(cvv != ScriptCodeGen.COMPILED_VERSION_VALUE)
+                throw new CVVMismatchException(cvv, ScriptCodeGen.COMPILED_VERSION_VALUE);
+
+            // Fill in simple parts of scriptObjCode object.
+            sourceHash = objFileReader.ReadString();
+            glblSizes.ReadFromFile(objFileReader);
+            int nStates = objFileReader.ReadInt32();
+
+            stateNames = new string[nStates];
+            for(int i = 0; i < nStates; i++)
+            {
+                stateNames[i] = objFileReader.ReadString();
+                if(asmFileWriter != null)
+                    asmFileWriter.WriteLine("  state[{0}] = {1}", i, stateNames[i]);
+            }
+
+            if(asmFileWriter != null)
+                glblSizes.WriteAsmFile(asmFileWriter, "numGbl");
+
+            string gblName;
+            while((gblName = objFileReader.ReadString()) != "")
+            {
+                string gblType = objFileReader.ReadString();
+                int gblIndex = objFileReader.ReadInt32();
+                Dictionary<int, string> names;
+                if(!globalVarNames.TryGetValue(gblType, out names))
+                {
+                    names = new Dictionary<int, string>();
+                    globalVarNames.Add(gblType, names);
+                }
+                names.Add(gblIndex, gblName);
+                if(asmFileWriter != null)
+                    asmFileWriter.WriteLine("  {0} = {1}[{2}]", gblName, gblType, gblIndex);
+            }
+
+            // Read in script-defined types.
+            sdObjTypesName = new Dictionary<string, TokenDeclSDType>();
+            sdDelTypes = new Dictionary<Type, string>();
+            int maxIndex = -1;
+            while((gblName = objFileReader.ReadString()) != "")
+            {
+                TokenDeclSDType sdt = TokenDeclSDType.ReadFromFile(sdObjTypesName,
+                                                      gblName, objFileReader, asmFileWriter);
+                sdObjTypesName.Add(gblName, sdt);
+                if(maxIndex < sdt.sdTypeIndex)
+                    maxIndex = sdt.sdTypeIndex;
+                if(sdt is TokenDeclSDTypeDelegate)
+                    sdDelTypes.Add(sdt.GetSysType(), gblName);
+            }
+            sdObjTypesIndx = new TokenDeclSDType[maxIndex + 1];
+            foreach(TokenDeclSDType sdt in sdObjTypesName.Values)
+                sdObjTypesIndx[sdt.sdTypeIndex] = sdt;
+
+            // Now fill in the methods (the hard part).
+            scriptEventHandlerTable = new ScriptEventHandler[nStates, (int)ScriptEventCode.Size];
+            dynamicMethods = new Dictionary<string, DynamicMethod>();
+            scriptSrcLocss = new Dictionary<string, KeyValuePair<int, ScriptSrcLoc>[]>();
+
+            ObjectTokens objectTokens = null;
+            if(asmFileWriter != null)
+                objectTokens = new OTDisassemble(this, asmFileWriter);
+            else if(srcFileWriter != null)
+                objectTokens = new OTDecompile(this, srcFileWriter);
+
+            try
+            {
+                ScriptObjWriter.CreateObjCode(sdObjTypesName, objFileReader, this, objectTokens);
+            }
+            finally
+            {
+                if(objectTokens != null)
+                    objectTokens.Close();
+            }
+
+            // We enter all script event handler methods in the ScriptEventHandler table.
+            // They are named:  <statename> <eventname>
+            foreach(KeyValuePair<string, DynamicMethod> kvp in dynamicMethods)
+            {
+                string methName = kvp.Key;
+                int i = methName.IndexOf(' ');
+                if(i < 0)
+                    continue;
+                string stateName = methName.Substring(0, i);
+                string eventName = methName.Substring(++i);
+                int stateCode;
+                for(stateCode = stateNames.Length; --stateCode >= 0;)
+                    if(stateNames[stateCode] == stateName)
+                        break;
+
+                int eventCode = (int)Enum.Parse(typeof(ScriptEventCode), eventName);
+                scriptEventHandlerTable[stateCode, eventCode] =
+                            (ScriptEventHandler)kvp.Value.CreateDelegate(typeof(ScriptEventHandler));
+            }
+
+            // Fill in all script-defined class vtables.
+            foreach(TokenDeclSDType sdt in sdObjTypesIndx)
+            {
+                if((sdt != null) && (sdt is TokenDeclSDTypeClass))
+                {
+                    TokenDeclSDTypeClass sdtc = (TokenDeclSDTypeClass)sdt;
+                    sdtc.FillVTables(this);
+                }
+            }
+        }
+
+        /**
+         * @brief Called once for every method found in objFileReader file.
+         *        It enters the method in the ScriptObjCode object table so it can be called.
+         */
+        public void EndMethod(DynamicMethod method, Dictionary<int, ScriptSrcLoc> srcLocs)
+        {
+            /*
+             * Save method object code pointer.
+             */
+            dynamicMethods.Add(method.Name, method);
+
+            /*
+             * Build and sort iloffset -> source code location array.
+             */
+            int n = srcLocs.Count;
+            KeyValuePair<int, ScriptSrcLoc>[] srcLocArray = new KeyValuePair<int, ScriptSrcLoc>[n];
+            n = 0;
+            foreach(KeyValuePair<int, ScriptSrcLoc> kvp in srcLocs)
+                srcLocArray[n++] = kvp;
+            Array.Sort(srcLocArray, endMethodWrapper);
+
+            /*
+             * Save sorted array.
+             */
+            scriptSrcLocss.Add(method.Name, srcLocArray);
+        }
+
+        /**
+         * @brief Called once for every method found in objFileReader file.
+         *        It enters the method in the ScriptObjCode object table so it can be called.
+         */
+        private static EndMethodWrapper endMethodWrapper = new EndMethodWrapper();
+        private class EndMethodWrapper: System.Collections.IComparer
+        {
+            public int Compare(object x, object y)
+            {
+                KeyValuePair<int, ScriptSrcLoc> kvpx = (KeyValuePair<int, ScriptSrcLoc>)x;
+                KeyValuePair<int, ScriptSrcLoc> kvpy = (KeyValuePair<int, ScriptSrcLoc>)y;
+                return kvpx.Key - kvpy.Key;
+            }
+        }
+    }
+}