dbx cheat sheet

dbx cheat sheet

Obtenido de http://tread.files.wordpress.com/2007/05/dbx-cheatsheet-solaris1.pdf.

Loading a program

dbx program_name
dbx process_id

Running a program

(dbx) run [args]
(dbx) run [args] [output ]

Examining core files

dbx program_name core
dbx core

Breakpoints

(dbx) stop in function_name
(dbx) stop at file:line
(dbx) status
(dbx) delete all/#breakpoint

Stepping

next [n]
step [n]
cont

Examining the call stack

where

Examining variables

print expression
display expression
undisplay expression
undisplay 0

Examining memory

examine address [/ [count] [format]

Tracing Execution

Display lines as executed
(dbx) trace event_spec [modifier]
e.g.,
trace step
trace nextin function
trace change variable
trace in func thread th_id
(dbx) dbxenv trace_speed number
(dbx) trace file output_file

Debugging multithreaded

threads
thread
thread thread_id
lwps

Miscellaneous

list [function_name]
dump (show local variables)
regs
detach

Walking the call stack

up [h] [number]
down [h] [number]
frame [h] [number]

Runtime checking

(dbx) check memuse
(dbx) check access

Generates reports about
memory access/leaks/use

Mismatched cores

e.g., when debugging a core generated on machine X (customer) using machine Y (developer)
(dbx) dbxenv core_lo_pathmap on
(dbx) pathmap paths_to_correct_libs
(dbx) pathmap /install/ /local/dbg/install/
(dbx) debug program core

Fix and continue

Dbx allows you to fix code and continue debugging without rebuilding/restarting the debug session. To fix
your code:
1. Change source
2. (dbx) fix
This rebuilds the .o, loads it in memory and runs till the fix. This does not change the exe, so the exe has to be rebuilt post debugging.

Exit

(dbx) quit