Managed/Tizen.Runtime/Preloader.cs

   1 /*
   2  * Copyright (c) 2019 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the License);
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an AS IS BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 using System;
  18 using System.IO;
  19 using System.Reflection;
  20 using System.Runtime.Loader;
  21 using System.Globalization;
  22
  23 namespace Tizen.Runtime
  24 {
  25     public class Preloader
  26     {
  27         const string preloadPath = "/usr/share/dotnet.tizen/preload/";
  28
  29         // If current culture's casing for ASCII is the same as invariant, it can take a fast path
  30         // than calling out to the OS for culture-aware casing.
  31         // However, in certain languages, the following function may be significantly slowed down.
  32         // To avoid that kind situation, call it in advance on the candidate process.
  33         private static void CheckAsciiCasing()
  34         {
  35             _ = CultureInfo.CurrentCulture.CompareInfo.Compare("abcdefghijklmnopqrstuvwxyz", "ABCDEFGHIJKLMNOPQRSTUVWXYZ", CompareOptions.IgnoreCase);
  36         }
  37
  38         public static void Preload()
  39         {
  40             CheckAsciiCasing();
  41
  42             string[] paths = Directory.GetFiles(preloadPath, "*.preload");
  43             Array.Sort(paths);
  44             foreach (string path in paths)
  45             {
  46                 string fileName = Path.GetFileName(path);
  47                 // ex) Tizen.preload / 0A.Tizen.preload / A0.Tizen.preload / .0.Tizen.preload / .00.Tizen.preload
  48                 if (!char.IsNumber(fileName, 0) || !char.IsNumber(fileName, 1))
  49                     continue;
  50
  51                 // ex) 000.Tizen.preload / 0.Tizen.preload
  52                 if (fileName.IndexOf('.') != 2)
  53                     continue;
  54
  55                 try
  56                 {
  57                     Console.WriteLine("Start preload : " + fileName);
  58                     BindingFlags bindingFlag = BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic;
  59                     foreach (string line in File.ReadLines(path))
  60                     {
  61                         if (line.StartsWith('#') || !line.Contains(".dll") || !line.Contains(' '))
  62                             continue;
  63
  64                         string[] getWord = line.Split(' ');
  65                         if (getWord.Length != 2)
  66                             continue;
  67
  68                         string assemblyStr = getWord[0].Replace(".dll", "");
  69                         string typenameStr = getWord[1];
  70                         string methodStr = "";
  71                         string parenthesis = "()";
  72
  73                         if (line.Contains(parenthesis))
  74                         {
  75                             string[] getMethod = typenameStr.Split('.');
  76                             methodStr = getMethod[getMethod.Length - 1].Replace(parenthesis, "");
  77                             typenameStr = typenameStr.Replace("." + methodStr + parenthesis, "");
  78                         }
  79
  80                         if (assemblyStr == "" || typenameStr == "" || typenameStr.Contains(parenthesis))
  81                         {
  82                             Console.WriteLine("[Warning] Skip the '" + line + "' in " + fileName);
  83                             continue;
  84                         }
  85
  86                         try
  87                         {
  88                             Assembly asm = AssemblyLoadContext.Default.LoadFromAssemblyName(new AssemblyName(assemblyStr));
  89                             Type type = asm.GetType(typenameStr);
  90                             if (type == null)
  91                                 Console.WriteLine("[Warning] Check the '" + line + "' in " + fileName);
  92
  93                             if (methodStr != "")
  94                             {
  95                                 MethodInfo method = type.GetMethod(methodStr, bindingFlag);
  96                                 method.Invoke(null, null);
  97                             }
  98                         }
  99                         catch
 100                         {
 101                             Console.WriteLine("[Error] Fail the '" + line + "' in " + fileName);
 102                         }
 103                     }
 104                 }
 105                 catch (IOException e)
 106                 {
 107                     Console.WriteLine(e.ToString());
 108                     Console.WriteLine("[Error] Failed to open file : " + fileName);
 109                 }
 110             }
 111
 112             GC.Collect();
 113             GC.WaitForPendingFinalizers();
 114         }
 115     }
 116 }