Function LocalProcessControlFile

src/backend/access/transam/xlog.c:5195–5201

* Read the control file, set respective GUCs. * * This is to be called during startup, including a crash recovery cycle, * unless in bootstrap mode, where no control file yet exists. As there's no * usable shared memory yet (its sizing can depend on the contents of the * control file!), first store the contents in local memory. XLOGShmemInit() * will then copy it to shared memory later. *

 * reset case, there's a dangling pointer into old shared memory), or not.
 */
void
LocalProcessControlFile(bool reset)
{
	Assert(reset || ControlFile == NULL);
	ControlFile = palloc(sizeof(ControlFileData));
	ReadControlFile();
}

/*
 * Initialization of shared memory for XLOG