public TracerContext LaunchTracerSuspended(string targetAssembly)
{
if (!File.Exists(targetAssembly))
{
throw new FileNotFoundException();
}
var hostCommServer = new HostCommServer();
hostCommServer.Initialize();
var procInfo = new Win32.ProcessInfo();
try {
Win32.StartupInfo startupInfo;
PrepareEnvironment(targetAssembly, hostCommServer.HostPipeName, out procInfo, out startupInfo);
}
catch (Exception e) {
}
TracedProcessInfo = procInfo;
return(new TracerContext {
Bootstrapper = this,
CommServer = hostCommServer
});
}
private void PrepareEnvironment(string targetFile, string pipeName, out Win32.ProcessInfo procInfo,
out Win32.StartupInfo startupInfo)
{
var tracerPath = GetTracerEnginePath();
if (tracerPath == null)
{
throw new Exception("Tracer engine could not be found.");
}
var envBlock = new StringBuilder();
envBlock.Append("COR_ENABLE_PROFILING=1\0");
envBlock.Append($"COR_PROFILER={ProfilerClsId}\0");
envBlock.Append($"COR_PROFILER_PATH={tracerPath}\0");
// We need to tell the tracer what our pipename is
envBlock.Append($"NETTrace_pipe_name=\\\\.\\pipe\\{pipeName}\0");
// We also need to tell the tracer where to find the settings file
envBlock.Append(
// ReSharper disable once AssignNullToNotNullAttribute
$"NETTrace_settings_file=\"{Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "settings.json")}\"\0");
var creationFlag = Win32.CreateProcess(targetFile, null, IntPtr.Zero, IntPtr.Zero, true, 0x00000004,
envBlock, null, out startupInfo, out procInfo);
if (!creationFlag)
{
throw new Exception("Could not create process");
}
}
