A finish breakpoint is a temporary breakpoint set at the return address of
a frame, based on the
gdb.Breakpoint. The underlying breakpoint will be disabled
and deleted when the execution will run out of the breakpoint scope (i.e.
Finish breakpoints are thread specific and must be create with the right
Create a finish breakpoint at the return address of the
object frame. If frame is not provided, this defaults to the
newest frame. The optional internal argument allows the breakpoint to
become invisible to the user. See Breakpoints In Python, for further
details about this argument.
In some circumstances (e.g.
longjmp, C++ exceptions, GDB
return command, …), a function may not properly terminate, and
thus never hit the finish breakpoint. When GDB notices such a
out_of_scope callback will be triggered.
You may want to sub-class
gdb.FinishBreakpoint and override this
class MyFinishBreakpoint (gdb.FinishBreakpoint) def stop (self): print ("normal finish") return True def out_of_scope (): print ("abnormal finish")
When GDB is stopped at a finish breakpoint and the frame
used to build the
gdb.FinishBreakpoint object had debug symbols, this
attribute will contain a
gdb.Value object corresponding to the return
value of the function. The value will be
None if the function return
void or if the return value was not computable. This attribute
is not writable.