public void PumpLargeDataSetThroughTinyBuffer()
{
using (UnmanagedCircularBuffer ncb = UnmanagedCircularBuffer.Create(memoryStart, UnmanagedCircularBuffer.SynchronizationOverheadSize + 3)) {
byte[] data = new byte[10000];
byte[] data2 = new byte[10000];
for (int i = 0; i < data.Length; i++)
{
data[i] = unchecked ((byte)(i + 1));
}
DoParallel(
delegate {
using (Stream w = ncb.CreateWritingStream()) {
w.Write(data, 0, data.Length);
}
},
delegate {
using (Stream r = ncb.CreateReadingStream()) {
int count = 0;
while (count < data2.Length)
{
count += r.Read(data2, count, data2.Length - count);
}
}
});
Assert.AreEqual(data, data2);
}
}
public void ReadFromEmptyBufferCausesTimeout()
{
using (UnmanagedCircularBuffer ncb = UnmanagedCircularBuffer.Create(memoryStart, memoryLength)) {
using (Stream s = ncb.CreateReadingStream()) {
s.ReadTimeout = 100;
s.ReadByte();
}
}
}
public void WriteAndReadFromBuffer()
{
using (UnmanagedCircularBuffer ncb = UnmanagedCircularBuffer.Create(memoryStart, memoryLength)) {
using (Stream ws = ncb.CreateWritingStream()) {
using (Stream rs = ncb.CreateReadingStream()) {
ws.WriteByte(0x42);
Assert.AreEqual(0x42, rs.ReadByte());
}
}
}
}
public void WriteToFullBufferCausesTimeout()
{
using (UnmanagedCircularBuffer ncb = UnmanagedCircularBuffer.Create(memoryStart, UnmanagedCircularBuffer.SynchronizationOverheadSize + 3)) {
using (Stream s = ncb.CreateWritingStream()) {
s.WriteTimeout = 100;
try {
s.WriteByte(1);
s.WriteByte(2);
} catch (TimeoutException) {
Assert.Fail("The first two calls should work");
}
s.WriteByte(3);
}
}
}
public void WriteAndReadFromBufferUsingMemoryMappedFile()
{
using (MemoryMappedFile mmf1 = MemoryMappedFile.CreateSharedMemory("Local\\TestMemory", 1024)) {
using (UnmanagedMemory view1 = mmf1.MapView(0, 1024)) {
using (UnmanagedCircularBuffer ncb = UnmanagedCircularBuffer.Create(view1.Start, (int)view1.Length)) {
using (Stream ws = ncb.CreateWritingStream()) {
ws.WriteByte(0x42);
}
using (MemoryMappedFile mmf2 = MemoryMappedFile.Open("Local\\TestMemory")) {
using (UnmanagedMemory view2 = mmf1.MapView(0, 1024)) {
Assert.AreNotEqual(view1.Start, view2.Start);
using (UnmanagedCircularBuffer ncb2 = UnmanagedCircularBuffer.Open(view2.Start)) {
using (Stream rs = ncb2.CreateReadingStream()) {
Assert.AreEqual(0x42, rs.ReadByte());
}
}
}
}
}
}
}
}
/// <summary>
/// Starts a new profiling session. Prepares IPC and starts the process and logging.
/// </summary>
/// <returns>The process information of the profilee.</returns>
public Process Start()
{
VerifyAccess();
if (is64Bit)
{
InitializeHeader64();
}
else
{
InitializeHeader32();
}
isRunning = true;
RegisterProfiler();
if (is64Bit)
{
nativeToManagedBuffer = UnmanagedCircularBuffer.Create(
new IntPtr(fullView.Pointer + memHeader64->NativeToManagedBufferOffset), bufferSize);
if ((Int64)(fullView.Pointer + memHeader64->NativeToManagedBufferOffset) % 8 != 0)
{
throw new DataMisalignedException("nativeToManagedBuffer is not properly aligned!");
}
}
else
{
nativeToManagedBuffer = UnmanagedCircularBuffer.Create(
new IntPtr(fullView.Pointer + memHeader32->NativeToManagedBufferOffset), bufferSize);
if ((Int32)(fullView.Pointer + memHeader32->NativeToManagedBufferOffset) % 8 != 0)
{
throw new DataMisalignedException("nativeToManagedBuffer is not properly aligned!");
}
}
if (is64Bit)
{
LogString("Using 64-bit hook.");
}
LogString("Starting process, waiting for profiler hook...");
this.profilee = new Process();
this.profilee.EnableRaisingEvents = true;
this.profilee.StartInfo = this.psi;
this.profilee.Exited += new EventHandler(ProfileeExited);
this.enableDC = this.profilerOptions.EnableDCAtStart;
this.isFirstDC = true;
Debug.WriteLine("Launching profiler for " + this.psi.FileName + "...");
this.profilee.Start();
this.logger.Start(nativeToManagedBuffer.CreateReadingStream());
// GC references currentSession
if (this.profilerOptions.EnableDC)
{
this.dataCollector.Start();
}
OnSessionStarted(EventArgs.Empty);
return(profilee);
}