static void LoadDbiStream(BitAccess bits,
                              out DbiModuleInfo[] modules,
                              out DbiDbgHdr header,
                              bool readStrings) {
      DbiHeader dh = new DbiHeader(bits);
      header = new DbiDbgHdr();

      if (dh.sig != -1 || dh.ver != 19990903) {
        throw new PdbException("Unsupported DBI Stream version, sig={0}, ver={1}",
                               dh.sig, dh.ver);
      }

      // Read gpmod section.
      var modList = new List<DbiModuleInfo>();
      int end = bits.Position + dh.gpmodiSize;
      while (bits.Position < end) {
        DbiModuleInfo mod = new DbiModuleInfo(bits, readStrings);
        modList.Add(mod);
      }
      if (bits.Position != end) {
        throw new PdbDebugException("Error reading DBI stream, pos={0} != {1}",
                                    bits.Position, end);
      }

      if (modList.Count > 0) {
        modules = modList.ToArray();
      } else {
        modules = null;
      }

      // Skip the Section Contribution substream.
      bits.Position += dh.secconSize;

      // Skip the Section Map substream.
      bits.Position += dh.secmapSize;

      // Skip the File Info substream.
      bits.Position += dh.filinfSize;

      // Skip the TSM substream.
      bits.Position += dh.tsmapSize;

      // Skip the EC substream.
      bits.Position += dh.ecinfoSize;

      // Read the optional header.
      end = bits.Position + dh.dbghdrSize;
      if (dh.dbghdrSize > 0) {
        header = new DbiDbgHdr(bits);
      }
      bits.Position = end;
    }