> I am trying to write a sane backend for my scanner, and I just can't debug
> it with gdb. When I set a breakpoint in my buggy function, the stack seems ok,
> but I can't access local variables. Parameters are available. I forced static
> build of scanimage by adding '-all-static' to libtool in the Makefile.
> Here's a sample of what I get when debugging scanimage:
> Breakpoint 2, sane_get_parameters (h=0x806b568, parms=0xbfff73d4) at dll-s.c:40
> 40 return ENTRY(get_parameters) (h, parms);
> (gdb) s
> sane_dll_get_parameters (handle=0x806b568, params=0xbfff73d4) at dll.c:820
> 820 DBG(3, "get_parameters(handle=%p,params=%p)\n", handle, params);
I think you expected that the breakpoint was set in your program and not
All backends use the same function names sane_open, sane_start, ...
so the function names for backends are renamed and you get the only one
with the name sane_get_parameters that is visible from the frontend
and that are the functions from sane_dll.
Ther are two possibilities:
1) do not use sane-dll, link the frontend (scanimage) directly against your backend
2) define the breakpoint with sourcode:linenumber. May be you can find out the function
names of your backend but I don`t know how this is generated.
-- Homepage: http://www.wolfsburg.de/~rauch sane-umax: http://www.wolfsburg.de/~rauch/sane/sane-umax.html xsane: http://www.wolfsburg.de/~rauch/sane/sane-xsane.html E-Mail: mailto:Oliver.Rauch@Wolfsburg.DE
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