Re: [Qemu-devel] [PATCH v3 2/2] trace: [all] Add "guest_mem_before" event

[Richard Henderson <rth@twiddle.net>]

On 05/18/2016 03:47 AM, Lluís Vilanova wrote:
> Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
> ---
>  include/exec/cpu_ldst_template.h          |   25 ++++++++++++++++
>  include/exec/cpu_ldst_useronly_template.h |   22 ++++++++++++++
>  tcg/tcg-op.c                              |   32 ++++++++++++++++++--
>  trace-events                              |   22 ++++++++++++++
>  trace/mem-internal.h                      |   46 +++++++++++++++++++++++++++++
>  trace/mem.h                               |   34 +++++++++++++++++++++
>  6 files changed, 177 insertions(+), 4 deletions(-)
>  create mode 100644 trace/mem-internal.h
>  create mode 100644 trace/mem.h
> 
> diff --git a/include/exec/cpu_ldst_template.h b/include/exec/cpu_ldst_template.h
> index 3091c00..eaf69a1 100644
> --- a/include/exec/cpu_ldst_template.h
> +++ b/include/exec/cpu_ldst_template.h
> @@ -23,6 +23,13 @@
>   * You should have received a copy of the GNU Lesser General Public
>   * License along with this library; if not, see <http://www.gnu.org/licenses/>.
>   */
> +
> +#if !defined(SOFTMMU_CODE_ACCESS)
> +#include "trace.h"
> +#endif
> +
> +#include "trace/mem.h"
> +
>  #if DATA_SIZE == 8
>  #define SUFFIX q
>  #define USUFFIX q
> @@ -80,6 +87,12 @@ glue(glue(glue(cpu_ld, USUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
>      int mmu_idx;
>      TCGMemOpIdx oi;
>  
> +#if !defined(SOFTMMU_CODE_ACCESS)
> +    trace_guest_mem_before_exec(
> +        ENV_GET_CPU(env), ptr,
> +        trace_mem_build_info(SHIFT, false, MO_TE, false));
> +#endif

I don't understand what this event is supposed to be tracing.
There's no documentation at all, even in the commit log.


r~