Re: [Qemu-devel] [PATCH 7/8] tcg: Sanity check deposit inputs

[Aurelien Jarno <aurelien@aurel32.net>]

On Fri, Sep 21, 2012 at 05:18:15PM -0700, Richard Henderson wrote:
> Given these are constants, checking once here means everything
> after can assume they're correct.
> 
> Signed-off-by: Richard Henderson <rth@twiddle.net>
> ---
>  tcg/tcg-op.h | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h
> index d2fb283..ecb1ac3 100644
> --- a/tcg/tcg-op.h
> +++ b/tcg/tcg-op.h
> @@ -2081,6 +2081,10 @@ static inline void tcg_gen_deposit_i32(TCGv_i32 ret, TCGv_i32 arg1,
>      uint32_t mask;
>      TCGv_i32 t1;
>  
> +    tcg_debug_assert(ofs < 32);
> +    tcg_debug_assert(len <= 32);
> +    tcg_debug_assert(ofs + len <= 32);
> +
>      if (ofs == 0 && len == 32) {
>          tcg_gen_mov_i32(ret, arg2);
>          return;
> @@ -2112,6 +2116,10 @@ static inline void tcg_gen_deposit_i64(TCGv_i64 ret, TCGv_i64 arg1,
>      uint64_t mask;
>      TCGv_i64 t1;
>  
> +    tcg_debug_assert(ofs < 64);
> +    tcg_debug_assert(len <= 64);
> +    tcg_debug_assert(ofs + len <= 64);
> +
>      if (ofs == 0 && len == 64) {
>          tcg_gen_mov_i64(ret, arg2);
>          return;
> -- 
> 1.7.11.4
> 

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>

-- 
Aurelien Jarno                          GPG: 1024D/F1BCDB73
aurelien@aurel32.net                 http://www.aurel32.net