Hello colleagues,
i think i've mentioned before: I'm not really a master on ccalls and the
pointer/struct/Type architecture, so it might be obvious to someone else
what's wrong here.
I'm doing a library adaptation (on libxcb.so), one of the major X11
libraries to put literally everything on screen. Clang.jl helps me in some
places, in some others, i manually convert c-structs and constants to julia
constructions.
A got recently (input to debugging) very strange behavior, as executing the
code in REPL steps works (at least doesn't fail), but as function sigfaults.
lobi@orange4:~/juliarepo$ ../julia04/julia
_
_ _ _(_)_ | A fresh approach to technical computing
(_) | (_) (_) | Documentation: http://docs.julialang.org
_ _ _| |_ __ _ | Type "help()" for help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 0.4.0-dev+5208 (2015-06-04 23:18 UTC)
_/ |\__'_|_|_|\__'_| | Commit e9fa25b* (19 days old master)
|__/ | x86_64-linux-gnu
julia> using XCB
julia> c = XCB.connect()
XCB.xcb_connection_t(Ptr{Void} @0x0000000002400af0)
julia> s0 = XCB.get_setup(c)
XCB.xcb_setup_t(0xf0,0xd8,0x0246,0x0000,0x0000,0x0246d8f0,0x00000000,
0x0246d8f0,0x00000000,0xd8c0,0x0246,0x00,0x00,0x00,0x00,0xc8,0x7c,0xc9,0x3a,
XCB.Array_4_Uint8(0xfc,0x7f,0x00,0x00))
julia> s = XCB.setup_roots_iterator(s0)
XCB.xcb_screen_iterator_t(Ptr{XCB.xcb_screen_t} @0x000000000247b968,0,57464)
julia> sc = unsafe_load(s.data)
XCB.xcb_screen_t(0x00000000,0x00000000,0x00000000,0x00000000,0x00000000,
0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x02480030,0x00,0x00,0x00,0x00)
julia> id = XCB.generate_id(c)
0x02600000
whereas:
lobi@orange4:~/juliarepo$ ../julia04/julia
_
_ _ _(_)_ | A fresh approach to technical computing
(_) | (_) (_) | Documentation: http://docs.julialang.org
_ _ _| |_ __ _ | Type "help()" for help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 0.4.0-dev+5208 (2015-06-04 23:18 UTC)
_/ |\__'_|_|_|\__'_| | Commit e9fa25b* (19 days old master)
|__/ | x86_64-linux-gnu
julia> using XCB
julia> XCB.test0()
signal (11): Segmentation fault
test0 at /home/lobi/.julia/v0.4/XCB/src/XCB.jl:123
jlcall_test0_21005 at (unknown line)
jl_apply_generic at /home/lobi/julia04/usr/bin/../lib/libjulia.so (unknown
line)
unknown function (ip: -955646749)
unknown function (ip: -955649750)
unknown function (ip: -955571213)
jl_toplevel_eval_in at /home/lobi/julia04/usr/bin/../lib/libjulia.so (unknown
line)
eval_user_input at REPL.jl:62
jlcall_eval_user_input_20884 at (unknown line)
jl_apply_generic at /home/lobi/julia04/usr/bin/../lib/libjulia.so (unknown
line)
anonymous at task.jl:91
unknown function (ip: -955622464)
unknown function (ip: 0)
Segmentation fault (core dumped)
with
function test0()
c = connect()
display(c)
s0 = get_setup(c)
display(s0)
s = setup_roots_iterator(s0)
display(s)
sc = unsafe_load(s.data)
display(sc)
id = generate_id(c)
#create_window(c,
# XCB_COPY_FROM_PARENT,id,sc.root,
# 0,0,150,150,10,XCB_WINDOW_CLASS_INPUT_OUTPUT,sc.root_visual,0,C_NULL)
c,s0,s,sc,id
end
Any idea?
