Re: [kvm-unit-tests PATCH] x86: Fix test failures as a result of using clang-18

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Queued, thanks.

Paolo

On Tue, Nov 29, 2022 at 9:33 PM Aaron Lewis <aaronlewis@xxxxxxxxxx> wrote:
>
> When building 'debug' test on clang-18 the compiler more aggressively
> inlines helper functions.  This results in test failures because some
> of the helpers are not intended to be inlined.  Fix this by marking
> those functions with 'noinline'.
>
> Reported-by: John Sperbeck <jsperbeck@xxxxxxxxxx>
> Signed-off-by: Aaron Lewis <aaronlewis@xxxxxxxxxx>
> ---
>  x86/debug.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/x86/debug.c b/x86/debug.c
> index b66bf04..65784c5 100644
> --- a/x86/debug.c
> +++ b/x86/debug.c
> @@ -128,7 +128,7 @@ static void report_singlestep_basic(unsigned long start, const char *usermode)
>                "%sSingle-step #DB basic test", usermode);
>  }
>
> -static unsigned long singlestep_basic(void)
> +static noinline unsigned long singlestep_basic(void)
>  {
>         unsigned long start;
>
> @@ -165,7 +165,7 @@ static void report_singlestep_emulated_instructions(unsigned long start,
>                "%sSingle-step #DB on emulated instructions", usermode);
>  }
>
> -static unsigned long singlestep_emulated_instructions(void)
> +static noinline unsigned long singlestep_emulated_instructions(void)
>  {
>         unsigned long start;
>
> @@ -204,7 +204,7 @@ static void report_singlestep_with_sti_blocking(unsigned long start,
>  }
>
>
> -static unsigned long singlestep_with_sti_blocking(void)
> +static noinline unsigned long singlestep_with_sti_blocking(void)
>  {
>         unsigned long start_rip;
>
> @@ -239,7 +239,7 @@ static void report_singlestep_with_movss_blocking(unsigned long start,
>                "%sSingle-step #DB w/ MOVSS blocking", usermode);
>  }
>
> -static unsigned long singlestep_with_movss_blocking(void)
> +static noinline unsigned long singlestep_with_movss_blocking(void)
>  {
>         unsigned long start_rip;
>
> @@ -277,7 +277,7 @@ static void report_singlestep_with_movss_blocking_and_icebp(unsigned long start,
>                "%sSingle-Step + ICEBP #DB w/ MOVSS blocking", usermode);
>  }
>
> -static unsigned long singlestep_with_movss_blocking_and_icebp(void)
> +static noinline unsigned long singlestep_with_movss_blocking_and_icebp(void)
>  {
>         unsigned long start;
>
> @@ -320,7 +320,7 @@ static void report_singlestep_with_movss_blocking_and_dr7_gd(unsigned long start
>                "Single-step #DB w/ MOVSS blocking and DR7.GD=1");
>  }
>
> -static unsigned long singlestep_with_movss_blocking_and_dr7_gd(void)
> +static noinline unsigned long singlestep_with_movss_blocking_and_dr7_gd(void)
>  {
>         unsigned long start_rip;
>
> --
> 2.38.1.584.g0f3c55d4c2-goog
>




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