test

Debugging a Program With dbx

fault fault

This event fires when the specified fault occurs. The faults are architecture dependent, but a set of them is known to dbx as defined by proc(4):

FLTILL

Illegal instruction 

FLTPRIV

Privileged instruction 

FLTBPT

Breakpoint instruction 

FLTTRACE*

Trace trap (single step) 

FLTACCESS*

Memory access (such as alignment) 

FLTBOUNDS*

Memory bounds (invalid address) 

FLTIOVF

Integer overflow 

FLTIZDIV

Integer zero divide 

FLTPE

Floating-point exception 

FLTSTACK

Irrecoverable stack fault 

FLTPAGE

Recoverable page fault 

Note -

Be aware that BPT, TRACE, and BOUNDS are used by dbx to implement breakpoints, single-stepping, and watchpoints. Handling them may interfere with the inner workings of dbx.

These faults are taken from /sys/fault.h. fault can be any of those listed above, in upper or lower case, with or without the FLT- prefix, or the actual numerical code.