private void NotifyKextPipTerminated(long pipId, IEnumerable <ReportedProcess> survivingChildProcesses)
{
// TODO: bundle this into a single message
var distinctProcessIds = new HashSet <uint>(survivingChildProcesses.Select(p => p.ProcessId));
foreach (var processId in distinctProcessIds)
{
KextConnection.NotifyKextPipProcessTerminated(pipId, (int)processId);
}
}
private async Task StartAsync()
{
base.CreateAndSetUpProcess();
Process.StartInfo.FileName = "/bin/sh";
Process.StartInfo.Arguments = string.Empty;
Process.StartInfo.RedirectStandardInput = true;
Process.Start();
Process.BeginOutputReadLine();
Process.BeginErrorReadLine();
// Generate "Process Created" report because the rest of the system expects to see it before any other file access reports
//
// IMPORTANT: do this before notifying sandbox kernel extension, because otherwise it can happen that a report
// from the extension is received before the "process created" report is handled, causing
// a "Should see a process creation before its accesses" assertion exception.
ReportProcessCreated();
// Allow read access for /bin/sh
ProcessInfo.FileAccessManifest.AddPath(
AbsolutePath.Create(PathTable, Process.StartInfo.FileName),
mask: FileAccessPolicy.MaskNothing,
values: FileAccessPolicy.AllowReadAlways);
if (MeasureCpuTime)
{
// Allow read access for /usr/bin/time
ProcessInfo.FileAccessManifest.AddPath(
AbsolutePath.Create(PathTable, TimeUtil),
mask: FileAccessPolicy.MaskNothing,
values: FileAccessPolicy.AllowReadAlways);
}
if (!KextConnection.NotifyKextPipStarted(ProcessInfo.FileAccessManifest, this))
{
ThrowCouldNotStartProcess("Failed to notify kernel extension about process start, make sure the extension is loaded");
}
try
{
await FeedStdInAsync();
SetProcessStartedExecuting();
m_processTreeTimeoutTask = ProcessTreeTimeoutTask();
}
catch (IOException e)
{
// IOException can happen if the process is forcefully killed while we're feeding its std in.
// When that happens, instead of crashing, just make sure the process is killed.
LogProcessState($"IOException caught while feeding the standard input: {e.Message}");
await KillAsync();
}
}
/// <summary>
/// Waits for all child processes to finish within a timeout limit and then termiantes all still running children after that point.
/// After all the children have been taken care of, the method waits for pending report processing to finish, then returns the
/// collected reports.
/// </summary>
internal override async Task <SandboxedProcessReports> GetReportsAsync()
{
if (!Killed)
{
var awaitedTask = await Task.WhenAny(m_pendingReports.Completion, m_processTreeTimeoutTask);
if (awaitedTask == m_processTreeTimeoutTask)
{
LogProcessState("Waiting for reports timed out; any surviving processes will be forcefully killed.");
await KillAsync();
}
}
// in any case must wait for pending reports to complete, because we must not freeze m_reports before that happens
await m_pendingReports.Completion;
// at this point this pip is done executing (it's only left to construct SandboxedProcessResult,
// which is done by the base class) so notify the sandbox kernel extension connection manager about it.
KextConnection.NotifyKextProcessFinished(PipId, this);
return(IgnoreReportedAccesses ? null : m_reports);
}