Fixing problem logging remotely when local logging was turned off.

For that, moved the remote logging from the Manager to the
WriterFrontend. That also simplifies the Manager a bit.

src/RemoteSerializer.cc

@@ -234,7 +234,7 @@ static const int PRINT_BUFFER_SIZE = 10 * 1024;
 static const int SOCKBUF_SIZE = 1024 * 1024;
 
 // Buffer size for remote-log data.
-static const int LOG_BUFFER_SIZE = 50 * 1024;
+static const int LOG_BUFFER_SIZE = 512;
 
 struct ping_args {
 	uint32 seq;
@@ -2587,8 +2587,11 @@ bool RemoteSerializer::SendLogWrite(Peer* peer, EnumVal* id, EnumVal* writer, st
 	if ( len > (LOG_BUFFER_SIZE - peer->log_buffer_used) || (network_time - last_flush > 1.0) )
 		{
 		if ( ! FlushLogBuffer(peer) )
+			{
+			delete [] data;
 			return false;
 			}
+		}
 
 	// If the data is actually larger than our complete buffer, just send it out.
 	if ( len > LOG_BUFFER_SIZE )
@@ -2631,6 +2634,12 @@ bool RemoteSerializer::ProcessLogCreateWriter()
 	if ( current_peer->state == Peer::CLOSING )
 		return false;
 
+#ifdef USE_PERFTOOLS
+	// Don't track allocations here, they'll be released only after the
+	// main loop exists. And it's just a tiny amount anyway.
+	HeapLeakChecker::Disabler disabler;
+#endif
+
 	assert(current_args);
 
 	EnumVal* id_val = 0;
@@ -2666,7 +2675,7 @@ bool RemoteSerializer::ProcessLogCreateWriter()
 	id_val = new EnumVal(id, BifType::Enum::Log::ID);
 	writer_val = new EnumVal(writer, BifType::Enum::Log::Writer);
 
-	if ( ! log_mgr->CreateWriter(id_val, writer_val, path, num_fields, fields) )
+	if ( ! log_mgr->CreateWriter(id_val, writer_val, path, num_fields, fields, true, false) )
 		goto error;
 
 	Unref(id_val);

src/logging/Manager.cc

@@ -753,64 +753,25 @@ bool Manager::Write(EnumVal* id, RecordVal* columns)
 			for ( int j = 0; j < filter->num_fields; ++j )
 				arg_fields[j] = new Field(*filter->fields[j]);
 
-			if ( filter->remote )
-				remote_serializer->SendLogCreateWriter(stream->id,
-								       filter->writer,
-								       path,
-								       filter->num_fields,
-								       arg_fields);
-
-			if ( filter->local )
-				{
 			writer = CreateWriter(stream->id, filter->writer,
 					      path, filter->num_fields,
-						      arg_fields);
+					      arg_fields, filter->local, filter->remote);
 
 			if ( ! writer )
 				{
 				Unref(columns);
 				return false;
 				}
-				}
-			else
-				{
-				// Insert a null pointer into the map to make
-				// sure we don't try creating it again.
-				stream->writers.insert(Stream::WriterMap::value_type(
-				Stream::WriterPathPair(filter->writer->AsEnum(), path), 0));
 
-				for( int i = 0; i < filter->num_fields; ++i)
-					delete arg_fields[i];
-
-				delete [] arg_fields;
-				}
 			}
 
 		// Alright, can do the write now.
 
-		if ( filter->local || filter->remote )
-			{
 		threading::Value** vals = RecordToFilterVals(stream, filter, columns);
 
-			if ( filter->remote )
-				remote_serializer->SendLogWrite(stream->id,
-								filter->writer,
-								path,
-								filter->num_fields,
-								vals);
-
-			if ( filter->local )
-				{
 		// Write takes ownership of vals.
 		assert(writer);
 		writer->Write(filter->num_fields, vals);
-				}
-
-			else
-				DeleteVals(filter->num_fields, vals);
-
-			}
-
 
 #ifdef DEBUG
 		DBG_LOG(DBG_LOGGING, "Wrote record to filter '%s' on stream '%s'",
@@ -976,7 +937,7 @@ Value** Manager::RecordToFilterVals(Stream* stream, Filter* filter,
 	}
 
 WriterFrontend* Manager::CreateWriter(EnumVal* id, EnumVal* writer, string path,
-				int num_fields, const Field* const*  fields)
+				int num_fields, const Field* const*  fields, bool local, bool remote)
 	{
 	Stream* stream = FindStream(id);
 
@@ -992,7 +953,7 @@ WriterFrontend* Manager::CreateWriter(EnumVal* id, EnumVal* writer, string path,
 		// return it.
 		return w->second->writer;
 
-	WriterFrontend* writer_obj = new WriterFrontend(writer->AsEnum());
+	WriterFrontend* writer_obj = new WriterFrontend(id, writer, local, remote);
 	assert(writer_obj);
 
 	writer_obj->Init(path, num_fields, fields);

src/logging/Manager.h

@@ -159,7 +159,8 @@ protected:
 
 	// Takes ownership of fields.
 	WriterFrontend* CreateWriter(EnumVal* id, EnumVal* writer, string path,
-				int num_fields, const threading::Field* const* fields);
+				int num_fields, const threading::Field* const* fields,
+				bool local, bool remote);
 
 	// Takes ownership of values..
 	bool Write(EnumVal* id, EnumVal* writer, string path,

src/logging/WriterFrontend.cc

@@ -99,21 +99,36 @@ public:
 
 using namespace logging;
 
-WriterFrontend::WriterFrontend(bro_int_t type)
+WriterFrontend::WriterFrontend(EnumVal* arg_stream, EnumVal* arg_writer, bool arg_local, bool arg_remote)
 	{
+	stream = arg_stream;
+	writer = arg_writer;
+	Ref(stream);
+	Ref(writer);
+
 	disabled = initialized = false;
 	buf = true;
+	local = arg_local;
+	remote = arg_remote;
 	write_buffer = 0;
 	write_buffer_pos = 0;
 	ty_name = "<not set>";
-	backend = log_mgr->CreateBackend(this, type);
 
+	if ( local )
+		{
+		backend = log_mgr->CreateBackend(this, writer->AsEnum());
 		assert(backend);
 		backend->Start();
 		}
 
+	else
+		backend = 0;
+	}
+
 WriterFrontend::~WriterFrontend()
 	{
+	Unref(stream);
+	Unref(writer);
 	}
 
 string WriterFrontend::Name() const
@@ -128,6 +143,8 @@ void WriterFrontend::Stop()
 	{
 	FlushWriteBuffer();
 	SetDisable();
+
+	if ( backend )
 		backend->Stop();
 	}
 
@@ -144,7 +161,17 @@ void WriterFrontend::Init(string arg_path, int arg_num_fields, const Field* cons
 	fields = arg_fields;
 
 	initialized = true;
+
+	if ( backend )
 		backend->SendIn(new InitMessage(backend, arg_path, arg_num_fields, arg_fields));
+
+	if ( remote )
+		remote_serializer->SendLogCreateWriter(stream,
+						       writer,
+						       arg_path,
+						       arg_num_fields,
+						       arg_fields);
+
 	}
 
 void WriterFrontend::Write(int num_fields, Value** vals)
@@ -152,6 +179,19 @@ void WriterFrontend::Write(int num_fields, Value** vals)
 	if ( disabled )
 		return;
 
+	if ( remote )
+		remote_serializer->SendLogWrite(stream,
+						writer,
+						path,
+						num_fields,
+						vals);
+
+	if ( ! backend )
+		{
+		DeleteVals(vals);
+		return;
+		}
+
 	if ( ! write_buffer )
 		{
 		// Need new buffer.
@@ -173,6 +213,7 @@ void WriterFrontend::FlushWriteBuffer()
 		// Nothing to do.
 		return;
 
+	if ( backend )
 		backend->SendIn(new WriteMessage(backend, num_fields, write_buffer_pos, write_buffer));
 
 	// Clear buffer (no delete, we pass ownership to child thread.)
@@ -187,6 +228,7 @@ void WriterFrontend::SetBuf(bool enabled)
 
 	buf = enabled;
 
+	if ( backend )
 		backend->SendIn(new SetBufMessage(backend, enabled));
 
 	if ( ! buf )
@@ -200,6 +242,8 @@ void WriterFrontend::Flush()
 		return;
 
 	FlushWriteBuffer();
+
+	if ( backend )
 		backend->SendIn(new FlushMessage(backend));
 	}
 
@@ -209,6 +253,8 @@ void WriterFrontend::Rotate(string rotated_path, double open, double close, bool
 		return;
 
 	FlushWriteBuffer();
+
+	if ( backend )
 		backend->SendIn(new RotateMessage(backend, this, rotated_path, open, close, terminating));
 	}
 
@@ -218,9 +264,20 @@ void WriterFrontend::Finish()
 		return;
 
 	FlushWriteBuffer();
+
+	if ( backend )
 		backend->SendIn(new FinishMessage(backend));
 	}
 
+void WriterFrontend::DeleteVals(Value** vals)
+	{
+	// Note this code is duplicated in Manager::DeleteVals().
+	for ( int i = 0; i < num_fields; i++ )
+		delete vals[i];
+
+	delete [] vals;
+	}
+
 
 
 

src/logging/WriterFrontend.h

@@ -25,14 +25,21 @@ public:
 	/**
 	 * Constructor.
 	 *
-	 * type: The backend writer type, with the value corresponding to the
+	 * stream: The logging stream.
+	 *
+	 * writer: The backend writer type, with the value corresponding to the
 	 * script-level \c Log::Writer enum (e.g., \a WRITER_ASCII). The
 	 * frontend will internally instantiate a WriterBackend of the
 	 * corresponding type.
 	 * 
+	 * local: If true, the writer will instantiate a local backend.
+	 *
+	 * remote: If true, the writer will forward all data to remote
+	 * clients.
+	 *
 	 * Frontends must only be instantiated by the main thread.
 	 */
-	WriterFrontend(bro_int_t type);
+	WriterFrontend(EnumVal* stream, EnumVal* writer, bool local, bool remote);
 
 	/**
 	 * Destructor.
@@ -187,10 +194,17 @@ public:
 protected:
 	friend class Manager;
 
+	void DeleteVals(threading::Value** vals);
+
+	EnumVal* stream;
+	EnumVal* writer;
+
 	WriterBackend* backend;	// The backend we have instanatiated.
 	bool disabled;	// True if disabled.
 	bool initialized;	// True if initialized.
 	bool buf;	// True if buffering is enabled (default).
+	bool local;	// True if logging locally.
+	bool remote;	// True if loggin remotely.
 
 	string ty_name;	// Name of the backend type. Set by the manager.
 	string path;	// The log path.

src/threading/BasicThread.cc

@@ -20,8 +20,8 @@ BasicThread::BasicThread()
 	terminating = false;
 	pthread = 0;
 
-	buf = 0;
+	buf_len = 2048;
-	buf_len = 1024;
+	buf = (char*) malloc(buf_len);
 
 	name = Fmt("thread-%d", ++thread_counter);
 
@@ -57,9 +57,6 @@ void BasicThread::SetOSName(const string& name)
 
 const char* BasicThread::Fmt(const char* format, ...)
 	{
-	if ( ! buf )
-		buf = (char*) malloc(buf_len);
-
 	va_list al;
 	va_start(al, format);
 	int n = safe_vsnprintf(buf, buf_len, format, al);
@@ -67,13 +64,15 @@ const char* BasicThread::Fmt(const char* format, ...)
 
 	if ( (unsigned int) n >= buf_len )
 		{ // Not enough room, grow the buffer.
-		buf_len = n + 32;
+		int tmp_len = n + 32;
-		buf = (char*) realloc(buf, buf_len);
+		char* tmp = (char*) malloc(tmp_len);
 
 		// Is it portable to restart?
 		va_start(al, format);
-		n = safe_vsnprintf(buf, buf_len, format, al);
+		n = safe_vsnprintf(tmp, tmp_len, format, al);
 		va_end(al);
+
+		free(tmp);
 		}
 
 	return buf;