Next over function and breakpoint setting

[Orjan Friberg <orjan.friberg@axis.com>]

Out of curiosity I followed what happens when issuing a next command 
over a function call.  The reason I got curious was that I noticed 
(remote protocol) that GDB sets a breakpoint on the first instruction of 
the function being stepped over, and, when stopped there, sets another 
breakpoint at that function's return address to accomplish the "next".

Actually, maybe that's a misrepresentation: looking at the code, it 
seems GDB does a step, and if it *then* finds it ended up inside a 
function (step_into_function -> step_over_function) it decides to step 
out of it.

Looking at the code in infcmd.c and infrun.c I'm sure there's a good 
reason for not just setting the breakpoint on the address belonging to 
the next line of code, but I couldn't find any comment saying what that 
reason is.  Anyone care to enlighten me?

(I couldn't say if any of this was remote target/CRIS specific; 
apologies if it is and I missed it.)

-- 
Orjan Friberg
Axis Communications