/// <inheritdoc />
public void NotifyRootProcessExited(long pipId, SandboxedProcessUnix process)
{
if (m_pipProcesses.TryGetValue(pipId, out var info))
{
info.RemovePid(process.ProcessId);
}
}
internal Info(Sandbox.ManagedFailureCallback failureCallback, SandboxedProcessUnix process, string reportsFifoPath, string famPath, string debugLogPath)
{
m_failureCallback = failureCallback;
Process = process;
ReportsFifoPath = reportsFifoPath;
FamPath = famPath;
DebugLogJailPath = debugLogPath;
m_pathCache = new Dictionary <string, PathCacheRecord>();
m_activeProcesses = new ConcurrentDictionary <int, byte>
{
[process.ProcessId] = 1
};
m_activeProcessesChecker = new CancellableTimedAction(
CheckActiveProcesses,
intervalMs: Math.Min((int)process.ChildProcessTimeout.TotalMilliseconds, (int)ActiveProcessesCheckerInterval.TotalMilliseconds));
// create a write handle (used to keep the fifo open, i.e.,
// the 'read' syscall won't receive EOF until we close this writer
m_lazyWriteHandle = new Lazy <SafeFileHandle>(() =>
{
LogDebug($"Opening FIFO '{ReportsFifoPath}' for writing");
return(IO.Open(ReportsFifoPath, IO.OpenFlags.O_WRONLY, 0));
});
// start a background thread for reading from the FIFO
m_workerThread = new Thread(StartReceivingAccessReports);
m_workerThread.IsBackground = true;
m_workerThread.Priority = ThreadPriority.Highest;
}
internal Info(Sandbox.ManagedFailureCallback failureCallback, SandboxedProcessUnix process, string reportsFifoPath, string famPath)
{
m_failureCallback = failureCallback;
Process = process;
ReportsFifoPath = reportsFifoPath;
FamPath = famPath;
m_pathCache = new Dictionary <string, PathCacheRecord>();
m_activeProcesses = new HashSet <int>
{
process.ProcessId
};
// create a write handle (used to keep the fifo open, i.e.,
// the 'read' syscall won't receive EOF until we close this writer
m_lazyWriteHandle = new Lazy <SafeFileHandle>(() =>
{
LogDebug($"Opening FIFO '{ReportsFifoPath}' for writing");
return(IO.Open(ReportsFifoPath, IO.OpenFlags.O_WRONLY, 0));
});
// start a background thread for reading from the FIFO
m_workerThread = new Thread(StartReceivingAccessReports);
m_workerThread.IsBackground = true;
m_workerThread.Priority = ThreadPriority.Highest;
}
/// <inheritdoc />
public bool NotifyPipFinished(long pipId, SandboxedProcessUnix process)
{
if (m_pipProcesses.TryRemove(pipId, out var info))
{
info.Dispose();
return(true);
}
else
{
return(false);
}
}
/// <inheritdoc />
public bool NotifyPipFinished(long pipId, SandboxedProcessUnix process)
{
if (m_pipProcesses.TryRemove(pipId, out var proc))
{
Contract.Assert(process == proc);
return(true);
}
else
{
return(false);
}
}
internal Info(Sandbox.ManagedFailureCallback failureCallback, SandboxedProcessUnix process, string reportsFifoPath, string famPath, string debugLogPath, bool isInTestMode)
{
m_isInTestMode = isInTestMode;
m_stopRequestCounter = 0;
m_completeAccessReportProcessingCounter = 0;
m_failureCallback = failureCallback;
Process = process;
ReportsFifoPath = reportsFifoPath;
FamPath = famPath;
DebugLogJailPath = debugLogPath;
m_waitToCompleteCts = new CancellationTokenSource();
m_pathCache = new Dictionary <string, PathCacheRecord>();
m_activeProcesses = new ConcurrentDictionary <int, byte>
{
[process.ProcessId] = 1
};
m_activeProcessesChecker = new CancellableTimedAction(
CheckActiveProcesses,
intervalMs: Math.Min((int)process.ChildProcessTimeout.TotalMilliseconds, (int)ActiveProcessesCheckerInterval.TotalMilliseconds));
// create a write handle (used to keep the fifo open, i.e.,
// the 'read' syscall won't receive EOF until we close this writer
m_lazyWriteHandle = new Lazy <SafeFileHandle>(() =>
{
LogDebug($"Opening FIFO '{ReportsFifoPath}' for writing");
return(IO.Open(ReportsFifoPath, IO.OpenFlags.O_WRONLY, 0));
});
// action block where parsing and processing of received ActionReport bytes is done
m_accessReportProcessingBlock = new ActionBlock <(PooledObjectWrapper <byte[]> wrapper, int length)>(ProcessBytes, new ExecutionDataflowBlockOptions
{
BoundedCapacity = DataflowBlockOptions.Unbounded,
MaxDegreeOfParallelism = 1,
EnsureOrdered = true
});
// start a background thread for reading from the FIFO
m_workerThread = new Thread(StartReceivingAccessReports);
m_workerThread.IsBackground = true;
m_workerThread.Priority = ThreadPriority.Highest;
}
/// <inheritdoc />
public bool NotifyPipStarted(LoggingContext loggingContext, FileAccessManifest fam, SandboxedProcessUnix process)
{
Contract.Requires(process.Started);
Contract.Requires(process.PipId != 0);
string rootDir = process.RootJail ?? Path.GetTempPath();
string fifoPath = Path.Combine(rootDir, $"bxl_Pip{process.PipSemiStableHash:X}.{process.ProcessId}.fifo");
string famPath = Path.ChangeExtension(fifoPath, ".fam");
string debugLogPath = null;
if (IsInTestMode)
{
debugLogPath = process.ToPathInsideRootJail(Path.ChangeExtension(fifoPath, ".log"));
fam.AddPath(toAbsPath(debugLogPath), mask: FileAccessPolicy.MaskAll, values: FileAccessPolicy.AllowAll);
}
// serialize FAM
using (var wrapper = Pools.MemoryStreamPool.GetInstance())
{
var debugFlags = true;
ArraySegment <byte> manifestBytes = fam.GetPayloadBytes(
loggingContext,
new FileAccessSetup {
DllNameX64 = string.Empty, DllNameX86 = string.Empty, ReportPath = process.ToPathInsideRootJail(fifoPath)
},
wrapper.Instance,
timeoutMins: 10, // don't care
debugFlagsMatch: ref debugFlags);
Contract.Assert(manifestBytes.Offset == 0);
File.WriteAllBytes(famPath, manifestBytes.ToArray());
}
process.LogDebug($"Saved FAM to '{famPath}'");
// create a FIFO (named pipe)
if (IO.MkFifo(fifoPath, IO.FilePermissions.S_IRWXU) != 0)
{
m_failureCallback?.Invoke(1, $"Creating FIFO {fifoPath} failed");
return(false);
}
process.LogDebug($"Created FIFO at '{fifoPath}'");
// create and save info for this pip
var info = new Info(m_failureCallback, process, fifoPath, famPath, debugLogPath);
if (!m_pipProcesses.TryAdd(process.PipId, info))
{
throw new BuildXLException($"Process with PidId {process.PipId} already exists");
}
info.Start();
return(true);
AbsolutePath toAbsPath(string path) => AbsolutePath.Create(process.PathTable, path);
}
/// <inheritdoc />
public void NotifyRootProcessExited(long pipId, SandboxedProcessUnix process)
{
// this implementation keeps track of what the root process is an when it exits,
// so it doesn't need to be notified about it separately
}
/// <inheritdoc />
public bool NotifyPipStarted(LoggingContext loggingContext, FileAccessManifest fam, SandboxedProcessUnix process)
{
Contract.Requires(process.Started);
Contract.Requires(fam.PipId != 0);
if (!m_pipProcesses.TryAdd(fam.PipId, process))
{
throw new BuildXLException($"Process with PidId {fam.PipId} already exists");
}
var setup = new FileAccessSetup()
{
DllNameX64 = string.Empty,
DllNameX86 = string.Empty,
ReportPath = process.ExecutableAbsolutePath, // piggybacking on ReportPath to pass full executable path
};
using (var wrapper = Pools.MemoryStreamPool.GetInstance())
{
var debugFlags = true;
ArraySegment <byte> manifestBytes = fam.GetPayloadBytes(
loggingContext,
setup,
wrapper.Instance,
timeoutMins: 10, // don't care because on Mac we don't kill the process from the Kext once it times out
debugFlagsMatch: ref debugFlags);
Contract.Assert(manifestBytes.Offset == 0);
var result = Sandbox.SendPipStarted(
processId: process.ProcessId,
pipId: fam.PipId,
famBytes: manifestBytes.Array,
famBytesLength: manifestBytes.Count,
type: Sandbox.ConnectionType.Kext,
info: ref m_kextConnectionInfo);
return(result);
}
}
