On 2018-07-06 08:23 +0200, Frans de Boer wrote:
> On 07/06/2018 05:32 AM, Michael Shell wrote:
> > On Thu, 5 Jul 2018 21:48:16 +0200
> > Frans de Boer <fr...@fransdb.nl> wrote:
> >
> > > I had even rebuild everything with systemd-232, and that worked as
> > > before. But after 232, things started to behave strange. Now way to
> > > debug systemd, whatever I do....
> >
> > Frans,
I read some systemd-238 code (src/core/main.c:1820):
> if (arg_system) {
> /* Make sure we leave a core dump without panicing the
> kernel. */
> install_crash_handler();
>
> if (!skip_setup) {
> r = mount_cgroup_controllers(arg_join_controllers);
> if (r < 0) {
> *ret_error_message = "Failed to mount cgroup
> hierarchies";
> return r;
> }
>
> status_welcome();
There is message from systemd crash handler (showing a SIGABRT and dumping
core), but there is no welcome message. So the problem should be in
mount_cgroup_controllers.
There IS a way to debug systemd - adding log_info into systemd source code
to output key variables and debug messages. I was one of the ACM/ICPC
contestants who are very familiar with this ``debugging technique". This
technique often outperforms GDB in programming contests. :)
--
Xi Ruoyao <r...@stu.xidian.edu.cn>
School of Aerospace Science and Technology, Xidian University
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