/// <summary>
/// Collects a diagnostic trace from a currently running process.
/// </summary>
/// <param name="ct">The cancellation token</param>
/// <param name="console"></param>
/// <param name="processId">The process to collect the trace from.</param>
/// <param name="name">The name of process to collect the trace from.</param>
/// <param name="output">The output path for the collected trace data.</param>
/// <param name="buffersize">Sets the size of the in-memory circular buffer in megabytes.</param>
/// <param name="providers">A list of EventPipe providers to be enabled. This is in the form 'Provider[,Provider]', where Provider is in the form: 'KnownProviderName[:Flags[:Level][:KeyValueArgs]]', and KeyValueArgs is in the form: '[key1=value1][;key2=value2]'</param>
/// <param name="profile">A named pre-defined set of provider configurations that allows common tracing scenarios to be specified succinctly.</param>
/// <param name="format">The desired format of the created trace file.</param>
/// <param name="duration">The duration of trace to be taken. </param>
/// <param name="clrevents">A list of CLR events to be emitted.</param>
/// <param name="clreventlevel">The verbosity level of CLR events</param>
/// <returns></returns>
private static async Task <int> Collect(CancellationToken ct, IConsole console, int processId, FileInfo output, uint buffersize, string providers, string profile, TraceFileFormat format, TimeSpan duration, string clrevents, string clreventlevel, string name)
{
try
{
Debug.Assert(output != null);
Debug.Assert(profile != null);
// Either processName or processId has to be specified.
if (name != null)
{
if (processId != 0)
{
Console.WriteLine("Can only specify either --name or --process-id option.");
return(ErrorCodes.ArgumentError);
}
processId = CommandUtils.FindProcessIdWithName(name);
if (processId < 0)
{
return(ErrorCodes.ArgumentError);
}
}
if (processId < 0)
{
Console.Error.WriteLine("Process ID should not be negative.");
return(ErrorCodes.ArgumentError);
}
else if (processId == 0)
{
Console.Error.WriteLine("--process-id is required");
return(ErrorCodes.ArgumentError);
}
if (profile.Length == 0 && providers.Length == 0 && clrevents.Length == 0)
{
Console.Out.WriteLine("No profile or providers specified, defaulting to trace profile 'cpu-sampling'");
profile = "cpu-sampling";
}
Dictionary <string, string> enabledBy = new Dictionary <string, string>();
var providerCollection = Extensions.ToProviders(providers);
foreach (EventPipeProvider providerCollectionProvider in providerCollection)
{
enabledBy[providerCollectionProvider.Name] = "--providers ";
}
if (profile.Length != 0)
{
var selectedProfile = ListProfilesCommandHandler.DotNETRuntimeProfiles
.FirstOrDefault(p => p.Name.Equals(profile, StringComparison.OrdinalIgnoreCase));
if (selectedProfile == null)
{
Console.Error.WriteLine($"Invalid profile name: {profile}");
return(ErrorCodes.ArgumentError);
}
Profile.MergeProfileAndProviders(selectedProfile, providerCollection, enabledBy);
}
// Parse --clrevents parameter
if (clrevents.Length != 0)
{
// Ignore --clrevents if CLR event provider was already specified via --profile or --providers command.
if (enabledBy.ContainsKey(Extensions.CLREventProviderName))
{
Console.WriteLine($"The argument --clrevents {clrevents} will be ignored because the CLR provider was configured via either --profile or --providers command.");
}
else
{
var clrProvider = Extensions.ToCLREventPipeProvider(clrevents, clreventlevel);
providerCollection.Add(clrProvider);
enabledBy[Extensions.CLREventProviderName] = "--clrevents";
}
}
if (providerCollection.Count <= 0)
{
Console.Error.WriteLine("No providers were specified to start a trace.");
return(ErrorCodes.ArgumentError);
}
PrintProviders(providerCollection, enabledBy);
var process = Process.GetProcessById(processId);
var shouldExit = new ManualResetEvent(false);
var shouldStopAfterDuration = duration != default(TimeSpan);
var rundownRequested = false;
System.Timers.Timer durationTimer = null;
ct.Register(() => shouldExit.Set());
var diagnosticsClient = new DiagnosticsClient(processId);
using (VirtualTerminalMode vTermMode = VirtualTerminalMode.TryEnable())
{
EventPipeSession session = null;
try
{
session = diagnosticsClient.StartEventPipeSession(providerCollection, true, (int)buffersize);
}
catch (DiagnosticsClientException e)
{
Console.Error.WriteLine($"Unable to start a tracing session: {e.ToString()}");
}
if (session == null)
{
Console.Error.WriteLine("Unable to create session.");
return(ErrorCodes.SessionCreationError);
}
if (shouldStopAfterDuration)
{
durationTimer = new System.Timers.Timer(duration.TotalMilliseconds);
durationTimer.Elapsed += (s, e) => shouldExit.Set();
durationTimer.AutoReset = false;
}
var stopwatch = new Stopwatch();
durationTimer?.Start();
stopwatch.Start();
LineRewriter rewriter = null;
using (var fs = new FileStream(output.FullName, FileMode.Create, FileAccess.Write))
{
Console.Out.WriteLine($"Process : {process.MainModule.FileName}");
Console.Out.WriteLine($"Output File : {fs.Name}");
if (shouldStopAfterDuration)
{
Console.Out.WriteLine($"Trace Duration : {duration.ToString(@"dd\:hh\:mm\:ss")}");
}
Console.Out.WriteLine("\n\n");
var fileInfo = new FileInfo(output.FullName);
Task copyTask = session.EventStream.CopyToAsync(fs);
if (!Console.IsOutputRedirected)
{
rewriter = new LineRewriter {
LineToClear = Console.CursorTop - 1
};
Console.CursorVisible = false;
}
Action printStatus = () =>
{
if (!Console.IsOutputRedirected)
{
rewriter?.RewriteConsoleLine();
}
fileInfo.Refresh();
Console.Out.WriteLine($"[{stopwatch.Elapsed.ToString(@"dd\:hh\:mm\:ss")}]\tRecording trace {GetSize(fileInfo.Length)}");
Console.Out.WriteLine("Press <Enter> or <Ctrl+C> to exit...");
if (rundownRequested)
{
Console.Out.WriteLine("Stopping the trace. This may take up to minutes depending on the application being traced.");
}
};
while (!shouldExit.WaitOne(100) && !(!Console.IsInputRedirected && Console.KeyAvailable && Console.ReadKey(true).Key == ConsoleKey.Enter))
{
printStatus();
}
// Behavior concerning Enter moving text in the terminal buffer when at the bottom of the buffer
// is different between Console/Terminals on Windows and Mac/Linux
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows) &&
!Console.IsOutputRedirected &&
rewriter != null &&
Math.Abs(Console.CursorTop - Console.BufferHeight) == 1)
{
rewriter.LineToClear--;
}
durationTimer?.Stop();
rundownRequested = true;
session.Stop();
do
{
printStatus();
} while (!copyTask.Wait(100));
}
Console.Out.WriteLine("\nTrace completed.");
if (format != TraceFileFormat.NetTrace)
{
TraceFileFormatConverter.ConvertToFormat(format, output.FullName);
}
}
}
catch (Exception ex)
{
Console.Error.WriteLine($"[ERROR] {ex.ToString()}");
return(ErrorCodes.TracingError);
}
finally
{
if (console.GetTerminal() != null)
{
Console.CursorVisible = true;
}
}
return(await Task.FromResult(0));
}
/// <summary>
/// Collects a diagnostic trace from a currently running process or launch a child process and trace it.
/// Append -- to the collect command to instruct the tool to run a command and trace it immediately. By default the IO from this process is hidden, but the --show-child-io option may be used to show the child process IO.
/// </summary>
/// <param name="ct">The cancellation token</param>
/// <param name="console"></param>
/// <param name="processId">The process to collect the trace from.</param>
/// <param name="name">The name of process to collect the trace from.</param>
/// <param name="output">The output path for the collected trace data.</param>
/// <param name="buffersize">Sets the size of the in-memory circular buffer in megabytes.</param>
/// <param name="providers">A list of EventPipe providers to be enabled. This is in the form 'Provider[,Provider]', where Provider is in the form: 'KnownProviderName[:Flags[:Level][:KeyValueArgs]]', and KeyValueArgs is in the form: '[key1=value1][;key2=value2]'</param>
/// <param name="profile">A named pre-defined set of provider configurations that allows common tracing scenarios to be specified succinctly.</param>
/// <param name="format">The desired format of the created trace file.</param>
/// <param name="duration">The duration of trace to be taken. </param>
/// <param name="clrevents">A list of CLR events to be emitted.</param>
/// <param name="clreventlevel">The verbosity level of CLR events</param>
/// <param name="port">Path to the diagnostic port to be created.</param>
/// <param name="showchildio">Should IO from a child process be hidden.</param>
/// <returns></returns>
private static async Task <int> Collect(CancellationToken ct, IConsole console, int processId, FileInfo output, uint buffersize, string providers, string profile, TraceFileFormat format, TimeSpan duration, string clrevents, string clreventlevel, string name, string diagnosticPort, bool showchildio)
{
int ret = 0;
bool collectionStopped = false;
bool cancelOnEnter = true;
bool cancelOnCtrlC = true;
bool printStatusOverTime = true;
try
{
Debug.Assert(output != null);
Debug.Assert(profile != null);
if (ProcessLauncher.Launcher.HasChildProc && showchildio)
{
// If showing IO, then all IO (including CtrlC) behavior is delegated to the child process
cancelOnCtrlC = false;
cancelOnEnter = false;
printStatusOverTime = false;
}
else
{
cancelOnCtrlC = true;
cancelOnEnter = !Console.IsInputRedirected;
printStatusOverTime = !Console.IsInputRedirected;
}
if (!cancelOnCtrlC)
{
ct = CancellationToken.None;
}
if (!ProcessLauncher.Launcher.HasChildProc)
{
if (showchildio)
{
Console.WriteLine("--show-child-io must not be specified when attaching to a process");
return(ErrorCodes.ArgumentError);
}
if (CommandUtils.ValidateArgumentsForAttach(processId, name, diagnosticPort, out int resolvedProcessId))
{
processId = resolvedProcessId;
}
else
{
return(ErrorCodes.ArgumentError);
}
}
else if (!CommandUtils.ValidateArgumentsForChildProcess(processId, name, diagnosticPort))
{
return(ErrorCodes.ArgumentError);
}
if (profile.Length == 0 && providers.Length == 0 && clrevents.Length == 0)
{
Console.Out.WriteLine("No profile or providers specified, defaulting to trace profile 'cpu-sampling'");
profile = "cpu-sampling";
}
Dictionary <string, string> enabledBy = new Dictionary <string, string>();
var providerCollection = Extensions.ToProviders(providers);
foreach (EventPipeProvider providerCollectionProvider in providerCollection)
{
enabledBy[providerCollectionProvider.Name] = "--providers ";
}
if (profile.Length != 0)
{
var selectedProfile = ListProfilesCommandHandler.DotNETRuntimeProfiles
.FirstOrDefault(p => p.Name.Equals(profile, StringComparison.OrdinalIgnoreCase));
if (selectedProfile == null)
{
Console.Error.WriteLine($"Invalid profile name: {profile}");
return(ErrorCodes.ArgumentError);
}
Profile.MergeProfileAndProviders(selectedProfile, providerCollection, enabledBy);
}
// Parse --clrevents parameter
if (clrevents.Length != 0)
{
// Ignore --clrevents if CLR event provider was already specified via --profile or --providers command.
if (enabledBy.ContainsKey(Extensions.CLREventProviderName))
{
Console.WriteLine($"The argument --clrevents {clrevents} will be ignored because the CLR provider was configured via either --profile or --providers command.");
}
else
{
var clrProvider = Extensions.ToCLREventPipeProvider(clrevents, clreventlevel);
providerCollection.Add(clrProvider);
enabledBy[Extensions.CLREventProviderName] = "--clrevents";
}
}
if (providerCollection.Count <= 0)
{
Console.Error.WriteLine("No providers were specified to start a trace.");
return(ErrorCodes.ArgumentError);
}
PrintProviders(providerCollection, enabledBy);
DiagnosticsClient diagnosticsClient;
Process process;
DiagnosticsClientBuilder builder = new DiagnosticsClientBuilder("dotnet-trace", 10);
bool shouldResumeRuntime = ProcessLauncher.Launcher.HasChildProc || !string.IsNullOrEmpty(diagnosticPort);
var shouldExit = new ManualResetEvent(false);
ct.Register(() => shouldExit.Set());
using (DiagnosticsClientHolder holder = await builder.Build(ct, processId, diagnosticPort, showChildIO: showchildio, printLaunchCommand: true))
{
// if builder returned null, it means we received ctrl+C while waiting for clients to connect. Exit gracefully.
if (holder == null)
{
return(await Task.FromResult(ret));
}
diagnosticsClient = holder.Client;
if (shouldResumeRuntime)
{
process = Process.GetProcessById(holder.EndpointInfo.ProcessId);
}
else
{
process = Process.GetProcessById(processId);
}
string processMainModuleFileName = "";
// Reading the process MainModule filename can fail if the target process closes
// or isn't fully setup. Retry a few times to attempt to address the issue
for (int attempts = 0; true; attempts++)
{
try
{
processMainModuleFileName = process.MainModule.FileName;
break;
}
catch
{
if (attempts > 10)
{
Console.Error.WriteLine("Unable to examine process.");
return(ErrorCodes.SessionCreationError);
}
Thread.Sleep(200);
}
}
if (String.Equals(output.Name, DefaultTraceName, StringComparison.OrdinalIgnoreCase))
{
DateTime now = DateTime.Now;
var processMainModuleFileInfo = new FileInfo(processMainModuleFileName);
output = new FileInfo($"{processMainModuleFileInfo.Name}_{now:yyyyMMdd}_{now:HHmmss}.nettrace");
}
var shouldStopAfterDuration = duration != default(TimeSpan);
var rundownRequested = false;
System.Timers.Timer durationTimer = null;
using (VirtualTerminalMode vTermMode = printStatusOverTime ? VirtualTerminalMode.TryEnable() : null)
{
EventPipeSession session = null;
try
{
session = diagnosticsClient.StartEventPipeSession(providerCollection, true, (int)buffersize);
if (shouldResumeRuntime)
{
diagnosticsClient.ResumeRuntime();
}
}
catch (DiagnosticsClientException e)
{
Console.Error.WriteLine($"Unable to start a tracing session: {e.ToString()}");
}
if (session == null)
{
Console.Error.WriteLine("Unable to create session.");
return(ErrorCodes.SessionCreationError);
}
if (shouldStopAfterDuration)
{
durationTimer = new System.Timers.Timer(duration.TotalMilliseconds);
durationTimer.Elapsed += (s, e) => shouldExit.Set();
durationTimer.AutoReset = false;
}
var stopwatch = new Stopwatch();
durationTimer?.Start();
stopwatch.Start();
LineRewriter rewriter = null;
using (var fs = new FileStream(output.FullName, FileMode.Create, FileAccess.Write))
{
Console.Out.WriteLine($"Process : {processMainModuleFileName}");
Console.Out.WriteLine($"Output File : {fs.Name}");
if (shouldStopAfterDuration)
{
Console.Out.WriteLine($"Trace Duration : {duration.ToString(@"dd\:hh\:mm\:ss")}");
}
Console.Out.WriteLine("\n\n");
var fileInfo = new FileInfo(output.FullName);
Task copyTask = session.EventStream.CopyToAsync(fs);
Task shouldExitTask = copyTask.ContinueWith((task) => shouldExit.Set());
if (printStatusOverTime)
{
rewriter = new LineRewriter {
LineToClear = Console.CursorTop - 1
};
Console.CursorVisible = false;
}
Action printStatus = () =>
{
if (printStatusOverTime)
{
rewriter?.RewriteConsoleLine();
fileInfo.Refresh();
Console.Out.WriteLine($"[{stopwatch.Elapsed.ToString(@"dd\:hh\:mm\:ss")}]\tRecording trace {GetSize(fileInfo.Length)}");
Console.Out.WriteLine("Press <Enter> or <Ctrl+C> to exit...");
}
if (rundownRequested)
{
Console.Out.WriteLine("Stopping the trace. This may take up to minutes depending on the application being traced.");
}
};
while (!shouldExit.WaitOne(100) && !(cancelOnEnter && Console.KeyAvailable && Console.ReadKey(true).Key == ConsoleKey.Enter))
{
printStatus();
}
// if the CopyToAsync ended early (target program exited, etc.), the we don't need to stop the session.
if (!copyTask.Wait(0))
{
// Behavior concerning Enter moving text in the terminal buffer when at the bottom of the buffer
// is different between Console/Terminals on Windows and Mac/Linux
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows) &&
printStatusOverTime &&
rewriter != null &&
Math.Abs(Console.CursorTop - Console.BufferHeight) == 1)
{
rewriter.LineToClear--;
}
collectionStopped = true;
durationTimer?.Stop();
rundownRequested = true;
session.Stop();
do
{
printStatus();
} while (!copyTask.Wait(100));
}
// At this point the copyTask will have finished, so wait on the shouldExitTask in case it threw
// an exception or had some other interesting behavior
shouldExitTask.Wait();
}
Console.Out.WriteLine($"\nTrace completed.");
if (format != TraceFileFormat.NetTrace)
{
TraceFileFormatConverter.ConvertToFormat(format, output.FullName);
}
}
if (!collectionStopped && !ct.IsCancellationRequested)
{
// If the process is shutting down by itself print the return code from the process.
// Capture this before leaving the using, as the Dispose of the DiagnosticsClientHolder
// may terminate the target process causing it to have the wrong error code
if (ProcessLauncher.Launcher.HasChildProc && ProcessLauncher.Launcher.ChildProc.WaitForExit(5000))
{
ret = ProcessLauncher.Launcher.ChildProc.ExitCode;
Console.WriteLine($"Process exited with code '{ret}'.");
collectionStopped = true;
}
}
}
}
catch (Exception ex)
{
Console.Error.WriteLine($"[ERROR] {ex.ToString()}");
ret = ErrorCodes.TracingError;
collectionStopped = true;
}
finally
{
if (printStatusOverTime)
{
if (console.GetTerminal() != null)
{
Console.CursorVisible = true;
}
}
if (ProcessLauncher.Launcher.HasChildProc)
{
if (!collectionStopped || ct.IsCancellationRequested)
{
ret = ErrorCodes.TracingError;
}
// If we launched a child proc that hasn't exited yet, terminate it before we exit.
if (!ProcessLauncher.Launcher.ChildProc.HasExited)
{
ProcessLauncher.Launcher.ChildProc.Kill();
}
}
}
return(await Task.FromResult(ret));
}