Running a debugging session

Breakpoints
You can set breakpoints in any function with an entry point known to your debugger.

Possible memory errors
Memory errors are usually caused by overrunning memory in a UDR.

Symbols in shared-object files
The database server resolves undefined symbols in a shared-object file when it loads the shared-object file. If a symbol is missing, the load fails on the first execution of the UDR, and the database server writes a message in the log file. Symbols defined in two different shared-object files are distinct entities and do not resolve against each other.