Re: Weirdness with self-defined record type

[Ralph Lange via Core-talk <core-talk at aps.anl.gov>]

Found it. For the record:

I was using the epicsOldString typedef (deprecated, I know) as a convenient way to have a fixed size string type.

Inside a function with an argument defined as   epicsOldString *text   , I did the "make sure it is null terminated" write as

  *text[MAX_STRING_SIZE-1] = '\0';
instead of
  (*text)[MAX_STRING_SIZE-1] = '\0';

Just rarely, depending on heap memory layout, the '\0' hit specific places in areas of memory with record instances, the structures were corrupted in a way that segfaulted the IOC.

Note to myself: Array typedefs are EVIL.

Thanks for all the hints!

~Ralph