Gdb

References

• 7.2 Example Debugging Session: Segmentation Fault Example

Compile with debug symbols

• Option -g:

gcc -g program.c           # -g : debug symbols

GDB commands

help

Get help on commands

run [ARGS]

Start debugged program. Arguments may include wildcards (*) and redirections (<, <<...)

backtrace [COUNT]

bt [COUNT]

where [COUNT]

Print backtrace of all stack frames, or innermost (outermost) COUNT frames if COUNT>0 (COUNT<0)

frame [FRAME]

Select and print stack frame

print VAR

Print value of variable VAR

kill

Kill current program

break FILELINE

Insert a breakpoint at file FILE, line LINE

next

Step to next instruction