1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/*
* 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 CVVMismatchException("Not an Yengine object file (bad magic)");
int cvv = objFileReader.ReadInt32();
if(cvv != ScriptCodeGen.COMPILED_VERSION_VALUE)
throw new CVVMismatchException(
"Object version is " + cvv.ToString() + " but accept only " + ScriptCodeGen.COMPILED_VERSION_VALUE.ToString());
// 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;
}
}
}
}
|
