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             if (!Directory.Exists(preloadPath))
  43                 return;
  44
  45             string[] paths = Directory.GetFiles(preloadPath, "*.preload");
  46             Array.Sort(paths);
  47             foreach (string path in paths)
  48             {
  49                 string fileName = Path.GetFileName(path);
  50
  51                 // GetFileName() can return NULL
  52                 if (fileName == null)
  53                     continue;
  54
  55                 // ex) Tizen.preload / 0A.Tizen.preload / A0.Tizen.preload / .0.Tizen.preload / .00.Tizen.preload
  56                 if (!char.IsNumber(fileName, 0) || !char.IsNumber(fileName, 1))
  57                     continue;
  58
  59                 // ex) 000.Tizen.preload / 0.Tizen.preload
  60                 if (fileName.IndexOf('.') != 2)
  61                     continue;
  62
  63                 string value = System.Environment.GetEnvironmentVariable("TIZEN_UIFW");
  64                 // if TIZEN_UIFW is not set, do not preload UI related dll
  65                 if (value == null && (fileName.Contains("NUI") || fileName.Contains("ElmSharp") || fileName.Contains("XSF") ))
  66                     continue;
  67                 else if (value == "ElmSharp" && fileName.Contains("NUI"))
  68                     continue;
  69                 else if (value == "NUI" && (fileName.Contains("ElmSharp") || fileName.Contains("XSF")))
  70                     continue;
  71
  72                 try
  73                 {
  74                     Console.WriteLine("Start preload : " + fileName);
  75                     BindingFlags bindingFlag = BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic;
  76                     foreach (string line in File.ReadLines(path))
  77                     {
  78                         if (line.StartsWith('#') || !line.Contains(".dll") || !line.Contains(' '))
  79                             continue;
  80
  81                         string[] getWord = line.Split(' ');
  82                         if (getWord.Length != 2)
  83                             continue;
  84
  85                         string assemblyStr = getWord[0].Replace(".dll", "");
  86                         string typenameStr = getWord[1];
  87                         string methodStr = "";
  88                         string parenthesis = "()";
  89
  90                         if (line.Contains(parenthesis))
  91                         {
  92                             string[] getMethod = typenameStr.Split('.');
  93                             methodStr = getMethod[getMethod.Length - 1].Replace(parenthesis, "");
  94                             typenameStr = typenameStr.Replace("." + methodStr + parenthesis, "");
  95                         }
  96
  97                         if (assemblyStr == "")
  98                         {
  99                             Console.WriteLine("[Warning] Skip the '" + line + "' in " + fileName);
 100                             continue;
 101                         }
 102
 103                         try
 104                         {
 105                             Assembly asm = AssemblyLoadContext.Default.LoadFromAssemblyName(new AssemblyName(assemblyStr));
 106                             if (asm == null)
 107                             {
 108                                 Console.WriteLine("[Warning] Check the '" + line + "' in " + fileName);
 109                                 continue;
 110                             }
 111
 112                             if (typenameStr != "" && !typenameStr.Contains(parenthesis))
 113                             {
 114                                 Type type = asm.GetType(typenameStr);
 115                                 if (type == null)
 116                                 {
 117                                     Console.WriteLine("[Warning] Check the '" + line + "' in " + fileName);
 118                                     continue;
 119                                 }
 120
 121                                 if (methodStr != "")
 122                                 {
 123                                     MethodInfo method = type.GetMethod(methodStr, bindingFlag);
 124                                     if (method == null)
 125                                     {
 126                                         Console.WriteLine("[Warning] Check the '" + line + "' in " + fileName);
 127                                         continue;
 128                                     }
 129                                     method.Invoke(null, null);
 130                                 }
 131                             }
 132                         }
 133                         catch
 134                         {
 135                             Console.WriteLine("[Error] Fail the '" + line + "' in " + fileName);
 136                         }
 137                     }
 138                 }
 139                 catch (IOException e)
 140                 {
 141                     Console.WriteLine(e.ToString());
 142                     Console.WriteLine("[Error] Failed to open file : " + fileName);
 143                 }
 144             }
 145
 146             GC.Collect();
 147             GC.WaitForPendingFinalizers();
 148
 149             Profiler.SetCandidateProcessProfile();
 150         }
 151     }
 152 }