Hello,
On 07.08.20 23:03, Daly, Connor G. wrote:
> Genode beginner here. Been working with the platform for a few weeks trying
> to port a standard Linux application I wrote to Genode. My program uses
> sockets, both for sending and receiving, and judging from the code in
> tcp_terminal, the only way to do sockets is with libc rather than native
> Genode. I've been trying to implement the first few phases of my program in
> Genode, but when I run them, no log messages seem to appear and I can't
> really tell if my program is doing anything. When I remove the libc relevant
> pieces of code and run my program through a base/Component, everything logs
> just fine. I created a small test program to find my mistake, so this piece
> of code does not log anything to qemu with a Linux target platform:
I tried you test program and getting:
[init] child "widget"
[init] RAM quota: 776K
[init] cap quota: 16
[init] ELF binary: widget
[init] priority: 0
[init -> widget] upgrading quota donation for PD session (0 bytes, 4 caps)
[init] child "widget" requests resources: ram_quota=0, cap_quota=4
The resource request stalls your application until the request gets fulfilled.
Since you have a static scenario configured, there is nobody looking at such
requests and nobody will respond/upgrade the resource request of your
component. Since your scenario is static anyway, you will just have to increase
the assigned cap quota of your component, e.g.
</default-route>
- <default caps="50"/>
+ <default caps="55"/>
<start name="widget">
or just a bit more, e.g. 100.
Now I tried to re-run your test, and get:
[init] child "widget"
[init] RAM quota: 776K
[init] cap quota: 21
[init] ELF binary: widget
[init] priority: 0
affinity 1x1 0x0 1x0 diag=0, label="init -> widget", ram_quota=31996,
cap_quota=5
[init] child "widget" requests resources: ram_quota=266240
Again, a resource request, but this time your configured memory is not
sufficient. So, I increased it a bit:
<default caps="55"/>
<start name="widget">
- <resource name="RAM" quantum="1M"/>
+ <resource name="RAM" quantum="1300K"/>
</start>
and now I get your "Hello world":
genode build completed
using 'core-linux' as 'core'
using 'ld-linux.lib.so' as 'ld.lib.so'
spawn ./core
Genode 20.05-159-g2b601c847f <local changes>
17592186044415 MiB RAM and 8997 caps assigned to init
[init] parent provides
[init] service "LOG"
[init] service "PD"
[init] service "CPU"
[init] service "ROM"
[init] service "IO_MEM"
[init] service "IO_PORT"
[init] service "RAM"
[init] child "widget"
[init] RAM quota: 1052K
[init] cap quota: 21
[init] ELF binary: widget
[init] priority: 0
[init -> widget] Hello world
Run script execution successful.
Just some further notes:
If you just porting a normal libc/posix application, without any interactions
with Genode services codewise, you can just start with your normal main()
entry, e.g.
repos/libports/src/test/libc/main.cc
repos/libports/src/test/libc/target.mk
repos/libports/run/libc.run
Additionally, your libc program needs some stdio/stderr/socket etc.
configuration, look into the libc.run or tcp_terminal.run example, eg. the
<vfs> and <libc> xml nodes are crucial, not optional ;-). Since you are doing
network, you may also look into repos/libports/run/lwip.run as inspiration.
Hope it helps,
Alex.
--
Alexander Boettcher
Genode Labs
https://www.genode-labs.com - https://www.genode.org
Genode Labs GmbH - Amtsgericht Dresden - HRB 28424 - Sitz Dresden
Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth
_______________________________________________
Genode users mailing list
[email protected]
https://lists.genode.org/listinfo/users
