More final markings.

These classes were recommended by gcc's -Wsugggest-final-types as places where
large numbers of virtual functions could be optimized away.

src/DNS_Mgr.h

@@ -38,7 +38,7 @@ enum DNS_MgrMode {
 // Number of seconds we'll wait for a reply.
 #define DNS_TIMEOUT 5
 
-class DNS_Mgr : public iosource::IOSource {
+class DNS_Mgr final : public iosource::IOSource {
 public:
 	explicit DNS_Mgr(DNS_MgrMode mode);
 	~DNS_Mgr() override;

src/Event.h

@@ -48,7 +48,7 @@ protected:
 extern uint64_t num_events_queued;
 extern uint64_t num_events_dispatched;
 
-class EventMgr : public BroObj, public iosource::IOSource {
+class EventMgr final : public BroObj, public iosource::IOSource {
 public:
 	EventMgr();
 	~EventMgr() override;

src/SerializationFormat.h

@@ -92,7 +92,7 @@ protected:
 	int bytes_read;
 };
 
-class BinarySerializationFormat : public SerializationFormat {
+class BinarySerializationFormat final : public SerializationFormat {
 public:
 	BinarySerializationFormat();
 	~BinarySerializationFormat() override;

src/Stats.h

@@ -65,7 +65,7 @@ protected:
 };
 
 
-class ProfileLogger : public SegmentStatsReporter {
+class ProfileLogger final : public SegmentStatsReporter {
 public:
 	ProfileLogger(BroFile* file, double interval);
 	~ProfileLogger() override;
@@ -84,7 +84,7 @@ private:
 
 
 // Generates load_sample() events.
-class SampleLogger : public SegmentStatsReporter {
+class SampleLogger final : public SegmentStatsReporter {
 public:
 	SampleLogger();
 	~SampleLogger() override;

src/Trigger.h

@@ -114,7 +114,7 @@ private:
 	ValCache cache;
 };
 
-class Manager : public iosource::IOSource {
+class Manager final : public iosource::IOSource {
 public:
 
 	Manager();

src/file_analysis/AnalyzerSet.h

@@ -165,7 +165,7 @@ private:
 	/**
 	 * Represents a request to add an analyzer to an analyzer set.
 	 */
-	class AddMod : public Modification {
+	class AddMod final : public Modification {
 	public:
 		/**
 		 * Construct request which can add an analyzer to an analyzer set.
@@ -186,7 +186,7 @@ private:
 	/**
 	 * Represents a request to remove an analyzer from an analyzer set.
 	 */
-	class RemoveMod : public Modification {
+	class RemoveMod final : public Modification {
 	public:
 		/**
 		 * Construct request which can remove an analyzer from an analyzer set.

src/file_analysis/FileReassembler.h

@@ -9,7 +9,7 @@ namespace file_analysis {
 
 class File;
 
-class FileReassembler : public Reassembler {
+class FileReassembler final : public Reassembler {
 public:
 
 	FileReassembler(File* f, uint64_t starting_offset);

src/input/Manager.cc

@@ -94,7 +94,7 @@ Manager::Stream::~Stream()
 	delete reader;
 	}
 
-class Manager::TableStream: public Manager::Stream {
+class Manager::TableStream final : public Manager::Stream {
 public:
 
 	unsigned int num_idx_fields;
@@ -116,7 +116,7 @@ public:
 	~TableStream() override;
 };
 
-class Manager::EventStream: public Manager::Stream {
+class Manager::EventStream final : public Manager::Stream {
 public:
 	EventHandlerPtr event;
 
@@ -128,7 +128,7 @@ public:
 	~EventStream() override;
 };
 
-class Manager::AnalysisStream: public Manager::Stream {
+class Manager::AnalysisStream final : public Manager::Stream {
 public:
 	string file_id;
 

src/input/readers/ascii/Ascii.h

@@ -33,7 +33,7 @@ struct FieldMapping {
 /**
  * Reader for structured ASCII files.
  */
-class Ascii : public ReaderBackend {
+class Ascii final : public ReaderBackend {
 public:
 	explicit Ascii(ReaderFrontend* frontend);
 	~Ascii() override;

src/input/readers/benchmark/Benchmark.h

@@ -10,7 +10,7 @@ namespace input { namespace reader {
 /**
  * A benchmark reader to measure performance of the input framework.
  */
-class Benchmark : public ReaderBackend {
+class Benchmark final : public ReaderBackend {
 public:
 	explicit Benchmark(ReaderFrontend* frontend);
 	~Benchmark() override;

src/input/readers/binary/Binary.h

@@ -12,7 +12,7 @@ namespace input { namespace reader {
 /**
  * Binary mode file reader.
  */
-class Binary : public ReaderBackend {
+class Binary final : public ReaderBackend {
 public:
 	explicit Binary(ReaderFrontend* frontend);
 	~Binary() override;

src/input/readers/config/Config.h

@@ -17,7 +17,7 @@ namespace input { namespace reader {
 /**
  * Reader for Configuration files.
  */
-class Config : public ReaderBackend {
+class Config final : public ReaderBackend {
 public:
 	explicit Config(ReaderFrontend* frontend);
 	~Config() override;

src/input/readers/raw/Raw.h

@@ -15,7 +15,7 @@ namespace input { namespace reader {
  * A reader that returns a file (or the output of a command) as a single
  * blob.
  */
-class Raw : public ReaderBackend {
+class Raw final : public ReaderBackend {
 public:
 	explicit Raw(ReaderFrontend* frontend);
 	~Raw() override;

src/input/readers/sqlite/SQLite.h

@@ -13,7 +13,7 @@
 
 namespace input { namespace reader {
 
-class SQLite : public ReaderBackend {
+class SQLite final : public ReaderBackend {
 public:
 	explicit SQLite(ReaderFrontend* frontend);
 	~SQLite() override;

src/iosource/Manager.h

@@ -159,7 +159,7 @@ private:
 
 	void RemoveAll();
 
-	class WakeupHandler : public IOSource {
+	class WakeupHandler final : public IOSource {
 	public:
 		WakeupHandler();
 		~WakeupHandler();

src/iosource/pcap/Source.h

@@ -13,7 +13,7 @@ extern "C" {
 namespace iosource {
 namespace pcap {
 
-class PcapSource : public iosource::PktSrc {
+class PcapSource final : public iosource::PktSrc {
 public:
 	PcapSource(const std::string& path, bool is_live);
 	~PcapSource() override;

src/logging/writers/ascii/Ascii.h

@@ -12,7 +12,7 @@
 
 namespace logging { namespace writer {
 
-class Ascii : public WriterBackend {
+class Ascii final : public WriterBackend {
 public:
 	explicit Ascii(WriterFrontend* frontend);
 	~Ascii() override;
@@ -75,4 +75,3 @@ private:
 
 }
 }
-

src/logging/writers/none/None.h

@@ -8,7 +8,7 @@
 
 namespace logging { namespace writer {
 
-class None : public WriterBackend {
+class None final : public WriterBackend {
 public:
 	explicit None(WriterFrontend* frontend) : WriterBackend(frontend)	{}
 	~None() override {};

src/logging/writers/sqlite/SQLite.h

@@ -13,7 +13,7 @@
 
 namespace logging { namespace writer {
 
-class SQLite : public WriterBackend {
+class SQLite final : public WriterBackend {
 public:
 	explicit SQLite(WriterFrontend* frontend);
 	~SQLite() override;

src/threading/formatters/Ascii.h

@@ -6,7 +6,7 @@
 
 namespace threading { namespace formatter {
 
-class Ascii : public Formatter {
+class Ascii final : public Formatter {
 public:
 	/**
 	 * A struct to pass the necessary configuration values to the

src/threading/formatters/JSON.h

@@ -14,7 +14,7 @@ namespace threading { namespace formatter {
   * A thread-safe class for converting values into a JSON representation
   * and vice versa.
   */
-class JSON : public Formatter {
+class JSON final : public Formatter {
 public:
 	enum TimeFormat {
 		TS_EPOCH,	// Doubles that represents seconds from the UNIX epoch.