[Bug gdb/30340] gdb.base/watchpoint-unaligned.exp produces TCL error

["ahajkova at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=30340

--- Comment #9 from Alexandra Hájková <ahajkova at redhat dot com> ---
(In reply to Luis Machado from comment #8)
> Thanks!
> 
> The ptrace requests for the debug registers seem to be going through just
> fine:
> 
> ptrace(PTRACE_GETREGSET, 1832792, NT_ARM_HW_WATCH, {iov_base=0xffffc0ea3b88,
> iov_len=264}) = 0
> 
> ptrace(PTRACE_GETREGSET, 1832792, NT_ARM_HW_BREAK, {iov_base=0xffffc0ea3b88,
> iov_len=264}) = 0
> 
> I think this rules out permissions issues with ptrace, and we're back at
> suspecting the architecture level comparisons.
> 
> Since you have ready access to the hardware, would you mind running a quick
> check on your side?
> 
> In gdb/nat/aarch64-linux-hw-point.c:compatible_debug_arch, could you please
> add a warning statement printing the debug_arch? Like we do for example in
> aarch64_linux_get_debug_reg_capacity when printing the number of
> watchpoints/breakpoints.
> 
> Then rebuild gdb, run the test (to create the test executable) and attempt
> to run that same command line we used for strace.
> 
> Could you then paste the architecture level that is printed?
> 
> Also, could you please paste the output of "cat /proc/cpuinfo"?
> 
> Thanks!

I'm getting 0 for the debug_arch.

as for the cpuinfo:
processor       : 0
BogoMIPS        : 50.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp
asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbs
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x3
CPU part        : 0xd0c
CPU revision    : 1

processor       : 1
BogoMIPS        : 50.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp
asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbs
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x3
CPU part        : 0xd0c
CPU revision    : 1

processor       : 2
BogoMIPS        : 50.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp
asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbs
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x3
CPU part        : 0xd0c
CPU revision    : 1

processor       : 3
BogoMIPS        : 50.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp
asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbs
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x3
CPU part        : 0xd0c
CPU revision    : 1

Should I update my patch to check for any warnings/errors or do you just want
to take care of this issue yourself?

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