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                 string value = System.Environment.GetEnvironmentVariable("TIZEN_UIFW");
  56                 // if TIZEN_UIFW is not set, do not preload UI related dll
  57                 if (value == null && (fileName.Contains("NUI") || fileName.Contains("ElmSharp") || fileName.Contains("XSF") ))
  58                     continue;
  59                 else if (value == "ElmSharp" && fileName.Contains("NUI"))
  60                     continue;
  61                 else if (value == "NUI" && (fileName.Contains("ElmSharp") || fileName.Contains("XSF")))
  62                     continue;
  63
  64                 try
  65                 {
  66                     Console.WriteLine("Start preload : " + fileName);
  67                     BindingFlags bindingFlag = BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic;
  68                     foreach (string line in File.ReadLines(path))
  69                     {
  70                         if (line.StartsWith('#') || !line.Contains(".dll") || !line.Contains(' '))
  71                             continue;
  72
  73                         string[] getWord = line.Split(' ');
  74                         if (getWord.Length != 2)
  75                             continue;
  76
  77                         string assemblyStr = getWord[0].Replace(".dll", "");
  78                         string typenameStr = getWord[1];
  79                         string methodStr = "";
  80                         string parenthesis = "()";
  81
  82                         if (line.Contains(parenthesis))
  83                         {
  84                             string[] getMethod = typenameStr.Split('.');
  85                             methodStr = getMethod[getMethod.Length - 1].Replace(parenthesis, "");
  86                             typenameStr = typenameStr.Replace("." + methodStr + parenthesis, "");
  87                         }
  88
  89                         if (assemblyStr == "" || typenameStr == "" || typenameStr.Contains(parenthesis))
  90                         {
  91                             Console.WriteLine("[Warning] Skip the '" + line + "' in " + fileName);
  92                             continue;
  93                         }
  94
  95                         try
  96                         {
  97                             Assembly asm = AssemblyLoadContext.Default.LoadFromAssemblyName(new AssemblyName(assemblyStr));
  98                             Type type = asm.GetType(typenameStr);
  99                             if (type == null)
 100                                 Console.WriteLine("[Warning] Check the '" + line + "' in " + fileName);
 101
 102                             if (methodStr != "")
 103                             {
 104                                 MethodInfo method = type.GetMethod(methodStr, bindingFlag);
 105                                 method.Invoke(null, null);
 106                             }
 107                         }
 108                         catch
 109                         {
 110                             Console.WriteLine("[Error] Fail the '" + line + "' in " + fileName);
 111                         }
 112                     }
 113                 }
 114                 catch (IOException e)
 115                 {
 116                     Console.WriteLine(e.ToString());
 117                     Console.WriteLine("[Error] Failed to open file : " + fileName);
 118                 }
 119             }
 120
 121             GC.Collect();
 122             GC.WaitForPendingFinalizers();
 123         }
 124     }
 125 }