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Subject: Re: Fix solib-disc.exp regression with x86 gdbserver
From: "H.J. Lu" <hjl.tools@gmail.com>
To: Pedro Alves <pedro@codesourcery.com>
Cc: gdb-patches@sourceware.org
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On Sat, Apr 10, 2010 at 6:52 PM, Pedro Alves <pedro@codesourcery.com> wrote:
> The testsuite shows a couple of new regression with x86 gdbserver:
>

>
> =A0#0 =A0init_register_cache (regcache=3D0x6453f0, regbuf=3D0x0) at ../..=
/../src/gdb/gdbserver/regcache.c:85
> =A0#1 =A00x00000000004074fb in new_register_cache () at ../../../src/gdb/=
gdbserver/regcache.c:114
> =A0#2 =A00x00000000004075a5 in realloc_register_cache (thread_p=3D0x64539=
0) at ../../../src/gdb/gdbserver/regcache.c:142
> =A0#3 =A00x00000000004068ce in for_each_inferior (list=3D0x63c5c0, action=
=3D0x407570 <realloc_register_cache>)
> =A0 =A0 at ../../../src/gdb/gdbserver/inferiors.c:134
> =A0#4 =A00x0000000000407662 in set_register_cache (regs=3D0x638580, n=3D5=
8) at ../../../src/gdb/gdbserver/regcache.c:167
> =A0#5 =A00x000000000041a0df in init_registers_amd64_linux () at amd64-lin=
ux.c:93
> =A0#6 =A00x0000000000423692 in x86_linux_update_xmltarget () at ../../../=
src/gdb/gdbserver/linux-x86-low.c:849
> =A0#7 =A00x00000000004238a2 in x86_linux_process_qsupported (query=3D0x0)=
 at ../../../src/gdb/gdbserver/linux-x86-low.c:980
> =A0#8 =A00x000000000042265e in linux_process_qsupported (query=3D0x0) at =
../../../src/gdb/gdbserver/linux-low.c:4235
> =A0#9 =A00x000000000040d433 in handle_query (own_buf=3D0x63d190 "qSupport=
ed:xmlRegisters=3Di386", packet_len=3D28,
> =A0...

How can I debug gdbserver with gdb? I tried and it didn't work.

> This is losing any register changes done before "disconnect" in
> the previous session.
>
> The patch below fixes it, and I've applied it.
>
> (H.J., in case you don't know yet, here's how one easily
> tests against gdbserver on localhost:
> =A0<http://sourceware.org/gdb/wiki/TestingGDB#Testing_gdbserver_in_a_nati=
ve_configuration>
> )

I will try it on AVX machine.

Thanks.

--=20
H.J.