gdb

Useful commands

• info args/functions/locals/variables/register
• layout asm
• record

Snippets

Backtrace on exit

catch syscall exit_group
run
bt

Using gdb non-interactively

Via the command line

gdb prog -ex run -ex bt -ex q

Via Python scripting

See more below.

#!/usr/bin/gdb -x

# trick type checkers
if globals().get("gdb") is None:
    from typing import Any
    gdb: Any = globals()["gdb"]

def go():
    gdb.execute("file prog")
    gdb.execute("core prog.core")
    gdb.execute("bt")

try:
    go()
except Exception as e:
    print(e)
finally:
    gdb.execute("quit")

Python API

Breakpoints

from gdb import Breakpoint

class MyBreakpoint(Breakpoint):
  def stop(self):
      print("here")

breakpoint = MyBreakpoint("function_name")
breakpoint.enabled = True

Events

def stop_handler(event):
    print("stopped")

gdb.events.stop.connect(stop_handler)

See also

• rr