/// <summary>
/// Reads the list of index items whose head is stored at the page index provided.
/// The data read from persistent storage is merges with the data already in memory
/// using the following protocol:
/// if the in memory data has the "IsDirty" flag set then we keep the in memory data
/// else we over-write the in-memory data with the data from disk
/// </summary>
/// <param name="stream">data file to read from</param>
/// <param name="pageIdx">index of the first physical page storing the list</param>
/// <returns>returns the index of the first physical page we read data from</returns>
public int ReadIndexData(FileStreamWrapper stream, int pageIdx)
{
List <IndexItem <T> > itemList = null;
List <int> pageIdxList = null;
// create reader
ListReader <IndexItem <T> > reader = new ListReader <IndexItem <T> >();
reader.ReadList(stream, pageIdx, out itemList, out pageIdxList);
// merge with current data
for (int idx = 0; idx < itemList.Count; idx++)
{
var item = itemList[idx];
IndexItem <T> indexEntry = null;
if (this.indexMap.TryGetValue(item.ResourceId, out indexEntry))
{
if (null == indexEntry ||
indexEntry.IsDirty)
{
continue;
}
}
this.indexMap[item.ResourceId] = item;
}
// update page index
this.indexStoragePages = pageIdxList;
// return index of the first page
return(this.indexStoragePages[0]);
}
public void SPT_TestReadWriteTable()
{
int entryCount = 40;
int physicalPageDistance = 5;
string dataFile = "SPT_TestData1.tpdb";
if (File.Exists(dataFile))
{
File.Delete(dataFile);
}
List <int> freedPages = null;
StoragePageManager spaceMgr = new StoragePageManager();
StoragePageTable pageTable2 = new StoragePageTable();
StoragePageTable pageTable = new StoragePageTable();
for (int idx = 0; idx < entryCount; idx++)
{
pageTable.SetLogicalPage(idx + physicalPageDistance);
}
using (FileStreamWrapper dataFileStream = FileStreamWrapper.CreateObject(dataFile))
{
int root = pageTable.WritePageTableData(dataFileStream, spaceMgr, out freedPages);
dataFileStream.Seek(0, SeekOrigin.Begin);
pageTable2.ReadPageTableData(dataFileStream, root);
}
for (int idx = 0; idx < entryCount; idx++)
{
int physicalAddress = pageTable2.GetPhysicalPage(idx);
Assert.AreEqual(idx + physicalPageDistance, physicalAddress);
}
}
[InlineData(5, 20, 10)] // Internal buffer too small, force a move-to operation
public void ReadData(int internalBufferLength, int outBufferLength, int requestedBytes)
{
// Setup:
// ... I have a file that has a handful of bytes in it
string fileName = Path.GetTempFileName();
const string stringToWrite = "hello";
CreateTestFile(fileName, stringToWrite);
byte[] targetBytes = Encoding.Unicode.GetBytes(stringToWrite);
try
{
// If:
// ... I have a file stream wrapper that has been initialized to an existing file
// ... And I read some bytes from it
int bytesRead;
byte[] buf = new byte[outBufferLength];
using (FileStreamWrapper fsw = new FileStreamWrapper())
{
fsw.Init(fileName, internalBufferLength, FileAccess.Read);
bytesRead = fsw.ReadData(buf, targetBytes.Length);
}
// Then:
// ... I should get those bytes back
Assert.Equal(targetBytes.Length, bytesRead);
Assert.True(targetBytes.Take(targetBytes.Length).SequenceEqual(buf.Take(targetBytes.Length)));
}
finally
{
// Cleanup:
// ... Delete the test file
CleanupTestFile(fileName);
}
}
/// <summary>
/// Reads the list of page table items whose head is stored at the page index provided.
/// The data read from persistent storage is merges with the data already in memory
/// using the following protocol:
/// if the in memory data has the "IsDirty" flag set then we keep the in memory data
/// else we over-write the in-memory data with the data from disk
/// </summary>
/// <param name="stream">data file to read from</param>
/// <param name="pageIdx">index of the first physical page storing the list</param>
/// <returns>returns the index of the first physical page we read data from</returns>
public int ReadPageTableData(FileStreamWrapper stream, int pageIdx)
{
List <PageTableItem> itemList = null;
List <int> pageIdxList = null;
// create reader
ListReader <PageTableItem> reader = new ListReader <PageTableItem>();
reader.ReadList(stream, pageIdx, out itemList, out pageIdxList);
// merge with current data
for (int idx = 0; idx < this.pageTable.Count && idx < itemList.Count; idx++)
{
if (!this.pageTable[idx].IsDirty)
{
this.pageTable[idx] = itemList[idx];
}
}
// add the missing ones
if (this.pageTable.Count < itemList.Count)
{
this.pageTable.AddRange(
itemList.GetRange(
this.pageTable.Count,
(itemList.Count - this.pageTable.Count)));
}
// update page index
this.pageTableStoragePages = pageIdxList;
// return index of the first page
return(this.pageTableStoragePages[0]);
}
public void InitSuccessful()
{
string fileName = Path.GetTempFileName();
try
{
using (FileStreamWrapper fsw = new FileStreamWrapper())
{
// If:
// ... I have a file stream wrapper that is initialized with valid parameters
fsw.Init(fileName, 8192, FileAccess.ReadWrite);
// Then:
// ... The file should exist
FileInfo fileInfo = new FileInfo(fileName);
Assert.True(fileInfo.Exists);
}
}
finally
{
// Cleanup:
// ... Delete the file that was created
try { File.Delete(fileName); } catch { /* Don't care */ }
}
}
/// <summary>
/// Remarks:
/// No locking needed beause this method cannot be invoked on the object.
/// It is only called during initialization before the object is returned
/// from the object factory method.
/// </summary>
/// <param name="filePath"></param>
private void Init(string filePath)
{
// open the file
this.dataFile = FileStreamWrapper.CreateObject(filePath);
DBHdr dbRoot = this.ReadDBRoot();
if (null == dbRoot)
{
// setup the data file
this.InitializeDataFile();
// flush the file
this.dataFile.Flush(true);
}
else
{
// read the prepared transaction data
this.preparedContextMap.ReadTransactionTableData(
this.dataFile, dbRoot.PrepedTransactions);
// read the data manager
this.pageManager.ReadPageManagerData(
this.dataFile, dbRoot.PageManager);
}
}
static public IEnumerable <(string filename, string content)> ReadFromFileStreamBackwards(string fileName,
Func <string, FileStream> OpenFile, long maxLines = long.MaxValue)
{
FileSeeker f = new FileSeeker();
using var fileStream = new FileStreamWrapper(OpenFile(fileName));
fileStream.Seek(0, SeekOrigin.End); // We want to read backwards - so start at the end
for (; ;)
{
string line = null;
try
{
line = f.SeekLastLineFromCurrentAndPositionOnStartOfItAndReturnReadLine(fileStream);
}
catch (Exception)
{
}
if (line != null && --maxLines > 0)
{
yield return(Path.GetFileNameWithoutExtension(fileName), line);
}
else
{
break;
}
}
}
public static bool Exists(string path)
{
if (String.IsNullOrEmpty(path))
{
return(false);
}
StreamWrapper wrapper;
if (StatInternalCheck(ref path, true, out wrapper))
{
string url;
if (StatInternalTryCache(path, out url))
{
return(true);
}
// we can't just call {Directory|File}.Exists since we have to throw warnings
// also we are not calling full stat(), it is slow
return(FileStreamWrapper.HandleNewFileSystemInfo(false, path, (p) =>
new FileInfo(p).Exists || new DirectoryInfo(p).Exists));
}
return(false);
}
public int ReadPageData(FileStreamWrapper stream, int pageIdx)
{
if (null == stream)
{
throw new ArgumentNullException();
}
byte[] dataBuffer = new byte[PageSize];
// read from the file stream
if (0 > pageIdx
|| stream.Length < (pageIdx + 1) * PageSize)
{
throw new InvalidPageException();
}
stream.Seek(pageIdx * PageSize, SeekOrigin.Begin);
stream.Read(dataBuffer, 0, dataBuffer.Length);
// initialize members
this.recordList = new List<byte[]>();
this.ReadPageData(dataBuffer);
return pageIdx;
}
public async Task <HttpResponseMessage> StopProfileAsync(int id)
{
using (_tracer.Step("ProcessController.StopProfileAsync"))
{
// check if the process Ids exists in the sandbox. If it doesn't, this method returns a 404 and we are done.
var process = GetProcessById(id);
bool iisProfiling = ProfileManager.IsIisProfileRunning(process.Id);
var result = await ProfileManager.StopProfileAsync(process.Id, _tracer, iisProfiling);
if (result.StatusCode != HttpStatusCode.OK)
{
return(Request.CreateErrorResponse(result.StatusCode, result.Message));
}
else
{
string profileFileFullPath = ProfileManager.GetProfilePath(process.Id, iisProfiling);
string profileFileName = Path.GetFileName(profileFileFullPath);
HttpResponseMessage response = Request.CreateResponse();
response.Content = new StreamContent(FileStreamWrapper.OpenRead(profileFileFullPath));
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
response.Content.Headers.ContentDisposition.FileName = profileFileName;
return(response);
}
}
}
public int ReadPageData(FileStreamWrapper stream, int pageIdx)
{
if (null == stream)
{
throw new ArgumentNullException();
}
byte[] dataBuffer = new byte[PageSize];
// read from the file stream
if (0 > pageIdx ||
stream.Length < (pageIdx + 1) * PageSize)
{
throw new InvalidPageException();
}
stream.Seek(pageIdx * PageSize, SeekOrigin.Begin);
stream.Read(dataBuffer, 0, dataBuffer.Length);
// initialize members
this.recordList = new List <byte[]>();
this.ReadPageData(dataBuffer);
return(pageIdx);
}
private void FileStream_Save(object sender, EventArgs e)
{
SaveFileDialog sfd = new SaveFileDialog();
sfd.FileName = fileName;
sfd.ShowDialog();
FileStreamWrapper.SaveFile(textBox1.Text);
}
private void FileStrea_Load(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.ShowDialog();
fileName = ofd.FileName;
FileStreamWrapper.fileName = fileName;
textBox1.Text = FileStreamWrapper.OpenFile();
}
public HttpResponseMessage GCDump(int id, int maxDumpCountK = 0, string format = null)
{
using (_tracer.Step("ProcessController.GCDump"))
{
DumpFormat dumpFormat = ParseDumpFormat(format, DumpFormat.DiagSession);
var process = GetProcessById(id);
var ext = dumpFormat == DumpFormat.DiagSession ? "diagsession" : "gcdump";
string dumpFile = Path.Combine(_environment.LogFilesPath, "minidump", "dump." + ext);
FileSystemHelpers.EnsureDirectory(_fileSystem, Path.GetDirectoryName(dumpFile));
FileSystemHelpers.DeleteFileSafe(_fileSystem, dumpFile);
string resourcePath = GetResponseFileName(process.ProcessName, "gcdump");
try
{
using (_tracer.Step(String.Format("GCDump pid={0}, name={1}, file={2}", process.Id, process.ProcessName, dumpFile)))
{
process.GCDump(dumpFile, resourcePath, maxDumpCountK, _tracer, _settings.GetCommandIdleTimeout());
_tracer.Trace("GCDump size={0}", new FileInfo(dumpFile).Length);
}
}
catch (Exception ex)
{
_tracer.TraceError(ex);
FileSystemHelpers.DeleteFileSafe(_fileSystem, dumpFile);
return(Request.CreateErrorResponse(HttpStatusCode.InternalServerError, ex.Message));
}
if (dumpFormat == DumpFormat.Zip)
{
string responseFileName = GetResponseFileName(process.ProcessName, "zip");
HttpResponseMessage response = Request.CreateResponse();
response.Content = ZipStreamContent.Create(responseFileName, _tracer, zip =>
{
try
{
zip.AddFile(dumpFile, String.Empty);
}
finally
{
FileSystemHelpers.DeleteFileSafe(_fileSystem, dumpFile);
}
});
return(response);
}
else
{
string responseFileName = GetResponseFileName(process.ProcessName, ext);
HttpResponseMessage response = Request.CreateResponse();
response.Content = new StreamContent(FileStreamWrapper.OpenRead(dumpFile, _fileSystem));
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
response.Content.Headers.ContentDisposition.FileName = responseFileName;
return(response);
}
}
}
public void InitInvalidBufferLength(int bufferLength)
{
// If:
// ... I have a file stream wrapper that is initialized with an invalid buffer length
// Then:
// ... I should throw an argument out of range exception
using (FileStreamWrapper fsw = new FileStreamWrapper())
{
Assert.Throws <ArgumentOutOfRangeException>(() => fsw.Init("validFileName", bufferLength, FileAccess.Read));
}
}
public void InitInvalidFilenameParameter(string fileName)
{
// If:
// ... I have a file stream wrapper that is initialized with invalid fileName
// Then:
// ... It should throw an argument null exception
using (FileStreamWrapper fsw = new FileStreamWrapper())
{
Assert.Throws <ArgumentException>(() => fsw.Init(fileName, 8192, FileAccess.Read));
}
}
public void InitInvalidFileAccessMode()
{
// If:
// ... I attempt to open a file stream wrapper that is initialized with an invalid file
// access mode
// Then:
// ... I should get an invalid argument exception
using (FileStreamWrapper fsw = new FileStreamWrapper())
{
Assert.Throws <ArgumentException>(() => fsw.Init("validFileName", 8192, FileAccess.Write));
}
}
public void PerformWriteOpOnReadOnlyWrapper()
{
byte[] buf = new byte[10];
using (FileStreamWrapper fsw = new FileStreamWrapper())
{
// If:
// ... I have a readonly file stream wrapper
// Then:
// ... Attempting to perform any write operation should result in an exception
Assert.Throws <InvalidOperationException>(() => fsw.WriteData(buf, 1));
Assert.Throws <InvalidOperationException>(() => fsw.Flush());
}
}
public void PerformOpWithoutInit()
{
byte[] buf = new byte[10];
using (FileStreamWrapper fsw = new FileStreamWrapper())
{
// If:
// ... I have a file stream wrapper that hasn't been initialized
// Then:
// ... Attempting to perform any operation will result in an exception
Assert.Throws <InvalidOperationException>(() => fsw.ReadData(buf, 1));
Assert.Throws <InvalidOperationException>(() => fsw.ReadData(buf, 1, 0));
Assert.Throws <InvalidOperationException>(() => fsw.WriteData(buf, 1));
Assert.Throws <InvalidOperationException>(() => fsw.Flush());
}
}
/// <summary>
/// Writes the page table item to persitent storage as a list of items.
/// </summary>
/// <param name="stream">data file</param>
/// <param name="manager">object that keeps track of free pages in the file</param>
/// <param name="freedPages">list of pages to be freed when transaction commits</param>
/// <returns>index of the first page storing the list</returns>
public int WritePageTableData(FileStreamWrapper stream, StoragePageManager manager, out List <int> freedPages)
{
List <int> pageIdxList = null;
// create the writer
ListWriter <PageTableItem> writer = new ListWriter <PageTableItem>();
writer.WriteList(stream, manager, this.pageTable, out pageIdxList);
// update the list that stores the physical page idx
freedPages = this.pageTableStoragePages;
this.pageTableStoragePages = pageIdxList;
// return the index of the first page
return(this.pageTableStoragePages[0]);
}
/// <summary>
/// Reads the list of data items whose head is stored at the page index provided.
/// </summary>
/// <param name="stream">data file to read from</param>
/// <param name="pageIdx">index of the first physical page storing the list</param>
/// <returns>returns the index of the first physical page we read data from</returns>
public int ReadPageManagerData(FileStreamWrapper stream, int pageIdx)
{
List<int> itemList = null;
List<int> pageIdxList = null;
// create reader
ListReader<int> reader = new ListReader<int>();
reader.ReadList(stream, pageIdx, out itemList, out pageIdxList);
// merge with current data
this.SetFreePages(itemList);
// update page index
this.managerStoragePages = pageIdxList;
return this.managerStoragePages[0];
}
public void SP_TestReadWritePage()
{
string dataFile = "SP_TestData1.tpdb";
if (File.Exists(dataFile))
{
File.Delete(dataFile);
}
TestData[] pageData =
{
new TestData {
data = "Record_0", recordIdx = 0
},
new TestData {
data = "Record_1", recordIdx = 1
},
new TestData {
data = "Record_2", recordIdx = 2
}
};
int pageIndex = int.MinValue;
// write the page
using (FileStreamWrapper dataFileStream = FileStreamWrapper.CreateObject(dataFile))
{
// populate the page with some data
StoragePage page = new StoragePage();
AddRecords(page, pageData);
// write the file to disk
pageIndex = page.WritePageData(dataFileStream, -1);
}
// read the page
using (FileStreamWrapper dataFileStream = FileStreamWrapper.CreateObject(dataFile))
{
// read page from file
StoragePage page = new StoragePage();
page.ReadPageData(dataFileStream, pageIndex);
// validate the page data
ReadRecords(page, pageData);
}
}
/// <summary>
/// Reads the list of data items whose head is stored at the page index provided.
/// </summary>
/// <param name="stream">data file to read from</param>
/// <param name="pageIdx">index of the first physical page storing the list</param>
/// <returns>returns the index of the first physical page we read data from</returns>
public int ReadPageManagerData(FileStreamWrapper stream, int pageIdx)
{
List <int> itemList = null;
List <int> pageIdxList = null;
// create reader
ListReader <int> reader = new ListReader <int>();
reader.ReadList(stream, pageIdx, out itemList, out pageIdxList);
// merge with current data
this.SetFreePages(itemList);
// update page index
this.managerStoragePages = pageIdxList;
return(this.managerStoragePages[0]);
}
public static bool IsFile(string path)
{
StreamWrapper wrapper;
if (StatInternalCheck(ref path, false, out wrapper))
{
string url;
if (StatInternalTryCache(path, out url))
{
return(((FileModeFlags)statCache.st_mode & FileModeFlags.File) != 0);
}
// we can't just call File.Exists since we have to throw warnings
// also we are not calling full stat(), it is slow
return(FileStreamWrapper.HandleNewFileSystemInfo(false, path, (p) => new FileInfo(p).Exists));
}
return(false);
}
/// <summary>
/// Writes the data item to persitent storage as a list of items.
/// </summary>
/// <param name="stream">data file to write to</param>
/// <param name="manager">object that keeps track of free pages in the file</param>
/// <param name="freedPages">list of pages to be freed when transaction commits</param>
/// <returns>index of the first page storing the list</returns>
public int WritePageManagerData(FileStreamWrapper stream)
{
lock (this.freePages)
{
this.writingSelf = true;
// make the list of pages to write
this.freePages.Insert(0, SelfWriteBarrier);
this.freePages.InsertRange(0, this.managerStoragePages);
// create writer
ListWriter <int> writer = new ListWriter <int>();
writer.WriteList(stream, this, this.freePages, out this.managerStoragePages);
this.writingSelf = false;
}
return(this.managerStoragePages[0]);
}
/// <summary>
/// Writes the index item to persitent storage as a list of items.
/// We handle deletes by setting the "value" in the map to null and
/// not writing any items whose value is null to persistent storage.
/// </summary>
/// <param name="stream">data file to write to</param>
/// <param name="manager">object that keeps track of free pages in the file</param>
/// <param name="freedPages">list of pages to be freed when transaction commits</param>
/// <returns>index of the first page storing the list</returns>
public int WriteIndexData(FileStreamWrapper stream, StoragePageManager manager, out List <int> freedPages)
{
List <int> pageIdxList = null;
// create the writer
ListWriter <IndexItem <T> > writer = new ListWriter <IndexItem <T> >();
writer.WriteList(
stream,
manager,
this.indexMap.Values.Where(c => c != null).ToList(),
out pageIdxList);
// update the list that stores the physical page idx
freedPages = this.indexStoragePages;
this.indexStoragePages = pageIdxList;
// return the index of the first page
return(this.indexStoragePages[0]);
}
public static int GetSize(string path)
{
StreamWrapper wrapper;
if (StatInternalCheck(ref path, false, out wrapper))
{
string url;
if (StatInternalTryCache(path, out url))
{
return(statCache.st_size);
}
// we are not calling full stat(), it is slow
return(FileStreamWrapper.HandleNewFileSystemInfo(-1, path, (p) => FileSystemUtils.FileSize(new FileInfo(p))));
}
return(-1);
//bool ok = StatInternal(path, false);
//if (!ok) return -1;
//return statCache.st_size;
}
/// <summary>
/// Reads the list of data items whose head is stored at the page index provided.
/// </summary>
/// <param name="stream">data file to read from</param>
/// <param name="pageIdx">index of the first physical page storing the list</param>
/// <returns>returns the index of the first physical page we read data from</returns>
public int ReadTransactionTableData(FileStreamWrapper stream, int pageIdx)
{
List<TransItem> itemList = null;
List<int> pageIdxList = null;
// create reader
ListReader<TransItem> reader = new ListReader<TransItem>();
reader.ReadList(stream, pageIdx, out itemList, out pageIdxList);
// clear the current data
this.contextTable.Clear();
foreach (TransItem item in itemList)
{
this.contextTable.Add(item.Transaction, item);
}
// update page index
this.contextTableStoragePages = pageIdxList;
// return index of the first page
return this.contextTableStoragePages[0];
}
public int WritePageData(FileStreamWrapper stream, int pageIdx)
{
if (null == stream)
{
throw new ArgumentNullException();
}
// get the page data
byte[] dataBuffer = new byte[PageSize];
this.WritePageData(dataBuffer);
// write to the file stream
if (0 > pageIdx ||
stream.Length < pageIdx * PageSize)
{
pageIdx = (int)(stream.Length / PageSize);
}
stream.Seek(pageIdx * PageSize, SeekOrigin.Begin);
stream.Write(dataBuffer, 0, dataBuffer.Length);
return(pageIdx);
}
[InlineData(10)] // Internal buffer too small, forces a flush
public void WriteData(int internalBufferLength)
{
string fileName = Path.GetTempFileName();
byte[] bytesToWrite = Encoding.Unicode.GetBytes("hello");
try
{
// If:
// ... I have a file stream that has been initialized
// ... And I write some bytes to it
using (FileStreamWrapper fsw = new FileStreamWrapper())
{
fsw.Init(fileName, internalBufferLength, FileAccess.ReadWrite);
int bytesWritten = fsw.WriteData(bytesToWrite, bytesToWrite.Length);
Assert.Equal(bytesToWrite.Length, bytesWritten);
}
// Then:
// ... The file I wrote to should contain only the bytes I wrote out
using (FileStream fs = File.OpenRead(fileName))
{
byte[] readBackBytes = new byte[1024];
int bytesRead = fs.Read(readBackBytes, 0, readBackBytes.Length);
Assert.Equal(bytesToWrite.Length, bytesRead); // If bytes read is not equal, then more or less of the original string was written to the file
Assert.True(bytesToWrite.SequenceEqual(readBackBytes.Take(bytesRead)));
}
}
finally
{
// Cleanup:
// ... Delete the test file
CleanupTestFile(fileName);
}
}
/// <summary>
/// Reads the list of data items whose head is stored at the page index provided.
/// </summary>
/// <param name="stream">data file to read from</param>
/// <param name="pageIdx">index of the first physical page storing the list</param>
/// <returns>returns the index of the first physical page we read data from</returns>
public int ReadTransactionTableData(FileStreamWrapper stream, int pageIdx)
{
List <TransItem> itemList = null;
List <int> pageIdxList = null;
// create reader
ListReader <TransItem> reader = new ListReader <TransItem>();
reader.ReadList(stream, pageIdx, out itemList, out pageIdxList);
// clear the current data
this.contextTable.Clear();
foreach (TransItem item in itemList)
{
this.contextTable.Add(item.Transaction, item);
}
// update page index
this.contextTableStoragePages = pageIdxList;
// return index of the first page
return(this.contextTableStoragePages[0]);
}
public static bool IsDirectory(string path)
{
StreamWrapper wrapper;
if (!string.IsNullOrEmpty(path) && StatInternalCheck(ref path, false, out wrapper)) // do not throw warning if path is null or empty
{
string url;
if (StatInternalTryCache(path, out url))
{
return(((FileModeFlags)statCache.st_mode & FileModeFlags.Directory) != 0);
}
// we can't just call Directory.Exists since we have to throw warnings
// also we are not calling full stat(), it is slow
return(FileStreamWrapper.HandleNewFileSystemInfo(false, path, (p) => new DirectoryInfo(p).Exists));
}
return(false);
//bool ok = !string.IsNullOrEmpty(path) && StatInternal(path, false); // do not throw warning if path is null or empty
//if (!ok) return false;
//return ((FileModeFlags)statCache.st_mode & FileModeFlags.Directory) > 0;
}
/// <summary>
/// Writes the data item to persitent storage as a list of items.
/// </summary>
/// <param name="stream">data file to write to</param>
/// <param name="manager">object that keeps track of free pages in the file</param>
/// <param name="freedPages">list of pages to be freed when transaction commits</param>
/// <returns>index of the first page storing the list</returns>
public int WritePageManagerData(FileStreamWrapper stream)
{
lock (this.freePages)
{
this.writingSelf = true;
// make the list of pages to write
this.freePages.Insert(0, SelfWriteBarrier);
this.freePages.InsertRange(0, this.managerStoragePages);
// create writer
ListWriter<int> writer = new ListWriter<int>();
writer.WriteList(stream, this, this.freePages, out this.managerStoragePages);
this.writingSelf = false;
}
return this.managerStoragePages[0];
}
public HttpResponseMessage MiniDump(int id, int dumpType = 0, string format = null)
{
using (_tracer.Step("ProcessController.MiniDump"))
{
DumpFormat dumpFormat = ParseDumpFormat(format, DumpFormat.Raw);
if (dumpFormat != DumpFormat.Raw && dumpFormat != DumpFormat.Zip)
{
return(Request.CreateErrorResponse(HttpStatusCode.BadRequest,
String.Format(CultureInfo.CurrentCulture, Resources.Error_DumpFormatNotSupported, dumpFormat)));
}
string sitePolicy = _settings.GetWebSitePolicy();
if ((MINIDUMP_TYPE)dumpType == MINIDUMP_TYPE.WithFullMemory && sitePolicy.Equals(FreeSitePolicy, StringComparison.OrdinalIgnoreCase))
{
return(Request.CreateErrorResponse(HttpStatusCode.InternalServerError,
String.Format(CultureInfo.CurrentCulture, Resources.Error_FullMiniDumpNotSupported, sitePolicy)));
}
var process = GetProcessById(id);
string dumpFile = Path.Combine(_environment.LogFilesPath, "minidump", "minidump.dmp");
FileSystemHelpers.EnsureDirectory(_fileSystem, Path.GetDirectoryName(dumpFile));
FileSystemHelpers.DeleteFileSafe(_fileSystem, dumpFile);
try
{
using (_tracer.Step(String.Format("MiniDump pid={0}, name={1}, file={2}", process.Id, process.ProcessName, dumpFile)))
{
process.MiniDump(dumpFile, (MINIDUMP_TYPE)dumpType);
_tracer.Trace("MiniDump size={0}", new FileInfo(dumpFile).Length);
}
}
catch (Exception ex)
{
_tracer.TraceError(ex);
FileSystemHelpers.DeleteFileSafe(_fileSystem, dumpFile);
return(Request.CreateErrorResponse(HttpStatusCode.InternalServerError, ex.Message));
}
if (dumpFormat == DumpFormat.Raw)
{
string responseFileName = GetResponseFileName(process.ProcessName, "dmp");
HttpResponseMessage response = Request.CreateResponse();
response.Content = new StreamContent(FileStreamWrapper.OpenRead(dumpFile, _fileSystem));
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
response.Content.Headers.ContentDisposition.FileName = responseFileName;
return(response);
}
else if (dumpFormat == DumpFormat.Zip)
{
string responseFileName = GetResponseFileName(process.ProcessName, "zip");
HttpResponseMessage response = Request.CreateResponse();
response.Content = ZipStreamContent.Create(responseFileName, _tracer, zip =>
{
try
{
zip.AddFile(dumpFile, String.Empty);
}
finally
{
FileSystemHelpers.DeleteFileSafe(_fileSystem, dumpFile);
}
foreach (var fileName in new[] { "sos.dll", "mscordacwks.dll" })
{
string filePath = Path.Combine(ProcessExtensions.ClrRuntimeDirectory, fileName);
if (_fileSystem.File.Exists(filePath))
{
zip.AddFile(filePath, String.Empty);
}
}
});
return(response);
}
else
{
return(Request.CreateErrorResponse(HttpStatusCode.BadRequest,
String.Format(CultureInfo.CurrentCulture, Resources.Error_DumpFormatNotSupported, dumpFormat)));
}
}
}
/// <summary>
/// Writes the data item to persitent storage as a list of items.
/// </summary>
/// <param name="stream">data file to write to</param>
/// <param name="manager">object that keeps track of free pages in the file</param>
/// <param name="freedPages">list of pages to be freed when transaction commits</param>
/// <returns>index of the first page storing the list</returns>
public int WriteTransactionTableData(FileStreamWrapper stream, StoragePageManager manager, out List<int> freedPages)
{
List<int> pageIdxList = null;
// create the writer
ListWriter<TransItem> writer = new ListWriter<TransItem>();
writer.WriteList(stream, manager, this.contextTable.Values.ToList() , out pageIdxList);
// update the list that stores the physical page idx
freedPages = this.contextTableStoragePages;
this.contextTableStoragePages = pageIdxList;
// return the index of the first page
return this.contextTableStoragePages[0];
}
public int WritePageData(FileStreamWrapper stream, int pageIdx)
{
if (null == stream)
{
throw new ArgumentNullException();
}
// get the page data
byte[] dataBuffer = new byte[PageSize];
this.WritePageData(dataBuffer);
// write to the file stream
if (0 > pageIdx
|| stream.Length < pageIdx * PageSize)
{
pageIdx = (int)(stream.Length / PageSize);
}
stream.Seek(pageIdx * PageSize, SeekOrigin.Begin);
stream.Write(dataBuffer, 0, dataBuffer.Length);
return pageIdx;
}
/// <summary>
/// Reads the list of page table items whose head is stored at the page index provided.
/// The data read from persistent storage is merges with the data already in memory
/// using the following protocol:
/// if the in memory data has the "IsDirty" flag set then we keep the in memory data
/// else we over-write the in-memory data with the data from disk
/// </summary>
/// <param name="stream">data file to read from</param>
/// <param name="pageIdx">index of the first physical page storing the list</param>
/// <returns>returns the index of the first physical page we read data from</returns>
public int ReadPageTableData(FileStreamWrapper stream, int pageIdx)
{
List<PageTableItem> itemList = null;
List<int> pageIdxList = null;
// create reader
ListReader<PageTableItem> reader = new ListReader<PageTableItem>();
reader.ReadList(stream, pageIdx, out itemList, out pageIdxList);
// merge with current data
for (int idx = 0; idx < this.pageTable.Count && idx < itemList.Count; idx++)
{
if (!this.pageTable[idx].IsDirty)
{
this.pageTable[idx] = itemList[idx];
}
}
// add the missing ones
if (this.pageTable.Count < itemList.Count)
{
this.pageTable.AddRange(
itemList.GetRange(
this.pageTable.Count,
(itemList.Count - this.pageTable.Count)));
}
// update page index
this.pageTableStoragePages = pageIdxList;
// return index of the first page
return this.pageTableStoragePages[0];
}