[PATCH][gdb/testsuite] Fix g0 search in gdb.arch/i386-sse-stack-align.exp

[Simon Marchi]

On 2021-01-26 1:03 p.m., Tom de Vries wrote:
> Hi,
> 
> When running test-case gdb.arch/i386-sse-stack-align.exp on target board
> unix/-m32, I run into:
> ...
> (gdb) print (int) g0 ()^M
> Invalid data type for function to be called.^M
> (gdb) FAIL: gdb.arch/i386-sse-stack-align.exp: print (int) g0 ()
> ...
> 
> Gdb is supposed to use minimal symbol g0:
> ...
> $ nm i386-sse-stack-align | grep g0
> 08049194 t g0
> ...
> but instead it finds a g0 symbol in the debug info of libm, specifically in
> ./sysdeps/ieee754/ldbl-96/e_lgammal_r.c.
> 
> Fix this by disabling reading symbols for shared libs.
> 
> Tested on x86_64-linux.
> 
> Any comments?
> 
> Thanks,
> - Tom
> 
> [gdb/testsuite] Fix g0 search in gdb.arch/i386-sse-stack-align.exp
> 
> gdb/testsuite/ChangeLog:
> 
> 2021-01-26  Tom de Vries  <tdevries@suse.de>
> 
> 	* gdb.arch/i386-sse-stack-align.exp: Set auto-solib-add to off.
> 
> ---
>  gdb/testsuite/gdb.arch/i386-sse-stack-align.exp | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/gdb/testsuite/gdb.arch/i386-sse-stack-align.exp b/gdb/testsuite/gdb.arch/i386-sse-stack-align.exp
> index 2c1cdd89c70..57dd12f9830 100644
> --- a/gdb/testsuite/gdb.arch/i386-sse-stack-align.exp
> +++ b/gdb/testsuite/gdb.arch/i386-sse-stack-align.exp
> @@ -37,6 +37,11 @@ if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable $opts
>  
>  clean_restart $executable
>  
> +# With libm debug info installed, I get a g0 from
> +# ./sysdeps/ieee754/ldbl-96/e_lgammal_r.c instead of the local g0.
> +# Fix this by disabling reading symbols for shared libs.
> +gdb_test_no_output "set auto-solib-add off"
> +
>  if ![runto_main] then {
>      return -1
>  }
> 

Couldn't we simply use some less common, more scoped name?

Simon