[Pkg-xen-devel] Bug#1073913: FTBFS with OCaml 5.2.0 (Problem in C stubs)

[Maximilian Engelhardt]

Control: tags -1 + pending

On Fri, 21 Jun 2024 09:01:02 +0200 Stéphane Glondu <glondu at debian.org> wrote:
> > Your package FTBFS with OCaml 5.2.0 for the following reason:
> > 
> >   Problem in C stubs
> 
> Attached is a patch that fixes the issues. It should also work with the 
> version of OCaml currently in unstable.

Unfortunately the patch makes xen 4.17 compile in unstable, but it gives a 
segmentation fault when trying to run the binary:

root at host:~# /usr/lib/xen-4.17/bin/oxenstored --no-fork
Xen Storage Daemon, version 1.0
Segmentation fault

root at host:~# gdb --args /usr/lib/xen-4.17/bin/oxenstored --no-fork
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Reading symbols from /usr/lib/xen-4.17/bin/oxenstored...
Reading symbols from /usr/lib/debug/.build-id/6e/
2ee766ed4e47a311ca34cdd765bc82bf8943e8.debug...
(gdb) run
Starting program: /usr/lib/xen-4.17/bin/oxenstored --no-fork
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Xen Storage Daemon, version 1.0

Program received signal SIGSEGV, Segmentation fault.
0x00005555556654dd in do_some_marking ()
(gdb) bt
#0  0x00005555556654dd in do_some_marking ()
#1  0x00005555556657d5 in mark ()
#2  0x0000555555665eaf in major_collection_slice ()
#3  0x00005555556666e4 in stw_finish_major_cycle ()
#4  0x0000555555654c89 in caml_try_run_on_all_domains_with_spin_work ()
#5  0x0000555555666825 in caml_finish_major_cycle ()
#6  0x000055555565b2ba in gc_full_major_exn ()
#7  0x000055555565be34 in caml_gc_stat ()
#8  <signal handler called>
#9  0x00005555555b312a in camlXenstored.entry ()
#10 0x00005555555ac927 in caml_program ()
#11 <signal handler called>
#12 0x0000555555675e15 in caml_startup_common ()
#13 0x0000555555675e8f in caml_main ()
#14 0x00005555555ac352 in main ()
(gdb) quit

Fortunately upstream seems to have fixed the problem in newer versions of xen 
and I tested it does not occur with xen 4.19 which we will upload to 
experimental soon.
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