private static void CleanAnalysisCacheStore(AnalysisCacheIndex cacheIndex)
{
try
{
ModuleIntrinsics.Tracer.WriteLine("Entering CleanAnalysisCacheStore.", new object[0]);
string str = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), @"Microsoft\Windows\PowerShell\CommandAnalysis\");
List <string> list = new List <string>();
HashSet <string> set = new HashSet <string>();
foreach (string str2 in cacheIndex.Entries.Keys)
{
AnalysisCacheIndexEntry entry = cacheIndex.Entries[str2];
string path = Path.Combine(str, entry.Path);
ModuleIntrinsics.Tracer.WriteLine("Cache index contains " + path, new object[0]);
if (!File.Exists(str2))
{
ModuleIntrinsics.Tracer.WriteLine("Module + " + str2 + " no longer exists. Deleting its index entry.", new object[0]);
File.Delete(path);
list.Add(str2);
}
else
{
set.Add(path);
}
}
foreach (string str4 in list)
{
cacheIndex.Entries.Remove(str4);
}
ModuleIntrinsics.Tracer.WriteLine("Searching for files with no cache entries.", new object[0]);
foreach (string str5 in Directory.EnumerateFiles(str, "PowerShell_AnalysisCacheEntry_*"))
{
if (!set.Contains(str5))
{
ModuleIntrinsics.Tracer.WriteLine("Found stale file: " + str5, new object[0]);
File.Delete(str5);
}
}
ModuleIntrinsics.Tracer.WriteLine("Saving cache index.", new object[0]);
cacheIndex.LastMaintenance = DateTime.Now;
SaveCacheIndex(cacheIndex);
}
catch (IOException exception)
{
ModuleIntrinsics.Tracer.WriteLine("Got an IO exception during cache maintenance: " + exception.ToString(), new object[0]);
disableDiskBasedCache = true;
}
catch (UnauthorizedAccessException exception2)
{
ModuleIntrinsics.Tracer.WriteLine("Got an UnauthorizedAccessException during cache maintenance: " + exception2.ToString(), new object[0]);
disableDiskBasedCache = true;
}
}
public static Dictionary <string, List <CommandTypes> > Get(string basePath, string path)
{
AnalysisCacheIndex cacheIndex = null;
ModuleIntrinsics.Tracer.WriteLine("Getting analysis cache entry for " + path + ".", new object[0]);
cacheIndex = GetCacheIndex(basePath);
if (cacheIndex == null)
{
ModuleIntrinsics.Tracer.WriteLine("Could not get cache index. Returning.", new object[0]);
return(null);
}
AnalysisCacheIndexEntry entry = null;
if (cacheIndex.Entries.TryGetValue(path, out entry))
{
ModuleIntrinsics.Tracer.WriteLine("Found cache entry for " + path, new object[0]);
if (new FileInfo(path).LastWriteTime == entry.LastWriteTime)
{
ModuleIntrinsics.Tracer.WriteLine("LastWriteTime is current.", new object[0]);
try
{
ModuleIntrinsics.Tracer.WriteLine("Deserializing from " + Path.Combine(basePath, entry.Path), new object[0]);
return(DeserializeFromFile <Dictionary <string, List <CommandTypes> > >(basePath, entry.Path));
}
catch (Exception exception)
{
ModuleIntrinsics.Tracer.WriteLine("Got an exception deserializing: " + exception.ToString(), new object[0]);
CommandProcessorBase.CheckForSevereException(exception);
if (string.IsNullOrEmpty(Environment.GetEnvironmentVariable("PSDisableModuleAutoloadingCacheMaintenance")))
{
ModuleIntrinsics.Tracer.WriteLine("Cleaning cache store.", new object[0]);
CleanAnalysisCacheStore(cacheIndex);
}
ModuleIntrinsics.Tracer.WriteLine("Returning NULL due to exception.", new object[0]);
return(null);
}
}
ModuleIntrinsics.Tracer.WriteLine("Returning NULL - LastWriteTime does not match.", new object[0]);
return(null);
}
ModuleIntrinsics.Tracer.WriteLine("Returning NULL - not cached.", new object[0]);
return(null);
}
internal static Dictionary <string, List <CommandTypes> > GetExportedCommands(string modulePath, bool testOnly, System.Management.Automation.ExecutionContext context)
{
if (string.IsNullOrEmpty(Environment.GetEnvironmentVariable("PSDisableModuleAutoLoadingMemoryCache")))
{
AnalysisCacheIndexEntry entry = null;
if ((itemCache.ContainsKey(modulePath) && (savedCacheIndex != null)) && savedCacheIndex.Entries.TryGetValue(modulePath, out entry))
{
lock (itemCache)
{
if (itemCache.ContainsKey(modulePath))
{
DateTime lastWriteTime = new FileInfo(modulePath).LastWriteTime;
if ((lastWriteTime == entry.LastWriteTime) && (itemCache[modulePath] != null))
{
return(itemCache[modulePath]);
}
ModuleIntrinsics.Tracer.WriteLine(string.Concat(new object[] { "Cache entry for ", modulePath, " was out of date. Cached on ", entry.LastWriteTime, ", last updated on ", lastWriteTime, ". Re-analyzing." }), new object[0]);
itemCache.Remove(modulePath);
}
}
}
}
string basePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), @"Microsoft\Windows\PowerShell\CommandAnalysis\");
ModuleIntrinsics.Tracer.WriteLine("Entering mutex PowerShell_CommandAnalysis_Lock", new object[0]);
Dictionary <string, List <CommandTypes> > dictionary = null;
using (Mutex mutex = new Mutex(false, "PowerShell_CommandAnalysis_Lock"))
{
mutex.WaitOne();
try
{
string fileNameWithoutExtension = Path.GetFileNameWithoutExtension(modulePath);
dictionary = Get(basePath, modulePath);
if (!testOnly && (dictionary == null))
{
try
{
if (modulesBeingAnalyzed.Contains(modulePath))
{
ModuleIntrinsics.Tracer.WriteLine(modulePath + " is already being analyzed. Exiting.", new object[0]);
return(null);
}
ModuleIntrinsics.Tracer.WriteLine("Registering " + modulePath + " for analysis.", new object[0]);
modulesBeingAnalyzed.Add(modulePath);
CommandInfo commandInfo = new CmdletInfo("Get-Module", typeof(GetModuleCommand), null, null, context);
Command command = new Command(commandInfo);
ModuleIntrinsics.Tracer.WriteLine("Listing modules.", new object[0]);
PowerShell.Create(RunspaceMode.CurrentRunspace).AddCommand(command).AddParameter("List", true).AddParameter("Name", fileNameWithoutExtension).AddParameter("ErrorAction", ActionPreference.Ignore).AddParameter("WarningAction", ActionPreference.Ignore).AddParameter("Verbose", false).AddParameter("Debug", false).Invoke <PSModuleInfo>();
}
catch (Exception exception)
{
ModuleIntrinsics.Tracer.WriteLine("Module analysis generated an exception: " + exception.ToString(), new object[0]);
CommandProcessorBase.CheckForSevereException(exception);
}
finally
{
ModuleIntrinsics.Tracer.WriteLine("Unregistering " + modulePath + " for analysis.", new object[0]);
modulesBeingAnalyzed.Remove(modulePath);
}
dictionary = Get(basePath, modulePath);
}
if (dictionary != null)
{
lock (itemCache)
{
ModuleIntrinsics.Tracer.WriteLine("Caching " + dictionary.Count + " exported commands.", new object[0]);
itemCache[modulePath] = dictionary;
goto Label_037E;
}
}
ModuleIntrinsics.Tracer.WriteLine("Detected an error while retrieving exported commands.", new object[0]);
}
finally
{
ModuleIntrinsics.Tracer.WriteLine("Releasing mutex.", new object[0]);
mutex.ReleaseMutex();
}
}
Label_037E:
if (dictionary != null)
{
ModuleIntrinsics.Tracer.WriteLine("Returning " + dictionary.Count + " exported commands.", new object[0]);
return(dictionary);
}
ModuleIntrinsics.Tracer.WriteLine("Returning NULL for exported commands", new object[0]);
return(dictionary);
}
private static void Cache <T>(string basePath, string path, T value)
{
bool flag = false;
ModuleIntrinsics.Tracer.WriteLine("Caching " + value + " to disk.", new object[0]);
AnalysisCacheIndex cacheIndex = GetCacheIndex(basePath);
if (cacheIndex == null)
{
ModuleIntrinsics.Tracer.WriteLine("Could not get cache index. Returning.", new object[0]);
}
else
{
AnalysisCacheIndexEntry entry;
ModuleIntrinsics.Tracer.WriteLine("Got cache index.", new object[0]);
if (!cacheIndex.Entries.TryGetValue(path, out entry))
{
entry = new AnalysisCacheIndexEntry();
string str = Guid.NewGuid().ToString();
entry.Path = "PowerShell_AnalysisCacheEntry_" + str;
flag = true;
ModuleIntrinsics.Tracer.WriteLine("Item not already in cache. Caching to " + entry.Path + ", need to update index.", new object[0]);
}
DateTime lastWriteTime = new FileInfo(path).LastWriteTime;
if (entry.LastWriteTime != lastWriteTime)
{
ModuleIntrinsics.Tracer.WriteLine(string.Concat(new object[] { "LastWriteTime for ", path, " + has changed. Old: ", entry.LastWriteTime, ", new: ", lastWriteTime, ". Need to update index." }), new object[0]);
entry.LastWriteTime = lastWriteTime;
flag = true;
}
string str2 = entry.Path;
ModuleIntrinsics.Tracer.WriteLine("Caching to " + str2, new object[0]);
if (flag)
{
cacheIndex = GetCacheIndexFromDisk(basePath);
cacheIndex.Entries[path] = entry;
}
try
{
if (savedCacheIndex != null)
{
savedCacheIndex.Entries[path] = entry;
}
SerializeToFile(value, str2);
}
catch (IOException exception)
{
ModuleIntrinsics.Tracer.WriteLine("Couldn't serialize file due to IOException - " + exception.ToString(), new object[0]);
disableDiskBasedCache = true;
}
catch (UnauthorizedAccessException exception2)
{
ModuleIntrinsics.Tracer.WriteLine("Couldn't serialize file due to UnauthorizedAccessException - " + exception2.ToString(), new object[0]);
disableDiskBasedCache = true;
}
if (flag && !disableDiskBasedCache)
{
ModuleIntrinsics.Tracer.WriteLine("Serializing index.", new object[0]);
SaveCacheIndex(cacheIndex);
savedCacheIndex = null;
}
}
}
