/// <summary>
/// Checks that
/// - a sideband file for a given process exists
/// - the sideband file is not corrupt (its checksum checks out)
/// - the process metadata recorded in the sideband file matches the metadata expected for this process
/// </summary>
private bool ValidateSidebandFileForProcess(Process process)
{
var sidebandFile = GetSidebandFile(process);
if (!FileUtilities.FileExistsNoFollow(sidebandFile))
{
return(failed(SidebandIntegrityCheckFailReason.FileNotFound));
}
using (var reader = new SidebandReader(sidebandFile))
{
if (!reader.ReadHeader(ignoreChecksum: false))
{
return(failed(SidebandIntegrityCheckFailReason.ChecksumMismatch));
}
var metadata = reader.ReadMetadata();
var expected = PipExecutor.CreateSidebandMetadata(Scheduler, process);
if (!metadata.Equals(expected))
{
return(failed(SidebandIntegrityCheckFailReason.MetadataMismatch, $"Expected: {expected}. Actual: {metadata}"));
}
return(true);
}
bool failed(SidebandIntegrityCheckFailReason reason, string details = "")
{
Logger.Log.SidebandIntegrityCheckForProcessFailed(LoggingContext, process.FormattedSemiStableHash, sidebandFile, reason.ToString(), details);
return(false);
}
}
/// <summary>
/// Checks that
/// - a sideband file for a given process exists
/// - the sideband file is not corrupt (its checksum checks out)
/// - the process metadata recorded in the sideband file matches the metadata expected for this process
/// Returns true on success and the sideband state in the out parameter
/// </summary>
private bool TryGetAndValidateSidebandStateForProcess(Process process, out IReadOnlyCollection <AbsolutePath> paths)
{
var sidebandFile = GetSidebandFile(process);
paths = null;
if (!FileUtilities.FileExistsNoFollow(sidebandFile))
{
return(failed(SidebandIntegrityCheckFailReason.FileNotFound));
}
using (var reader = new SidebandReader(sidebandFile))
{
if (!reader.ReadHeader(ignoreChecksum: false))
{
return(failed(SidebandIntegrityCheckFailReason.ChecksumMismatch));
}
var metadata = reader.ReadMetadata();
var expected = PipExecutor.CreateSidebandMetadata(Scheduler, process);
if (!metadata.Equals(expected))
{
return(failed(SidebandIntegrityCheckFailReason.MetadataMismatch, $"Expected: {expected}. Actual: {metadata}"));
}
paths = reader.ReadRecordedPaths().Select(p => AbsolutePath.Create(Context.PathTable, p)).ToHashSet();
return(true);
}
bool failed(SidebandIntegrityCheckFailReason reason, string details = "")
{
Logger.Log.SidebandIntegrityCheckForProcessFailed(LoggingContext, process.FormattedSemiStableHash, sidebandFile, reason.ToString(), details);
return(false);
}
}