On Tue, Sep 27, 2022 at 3:04 AM Lulu Cheng <chengl...@loongson.cn> wrote:
>
> v1 - > v2:
>
> 1. When the macro __loongarch_lp64 is defined, the VTV_PAGE_SIZE is set to
> 64K.
> 2. In the vtv_malloc.cc file __vtv_malloc_init function, it does not check
> whether VTV_PAGE_SIZE is equal to the system page size, if the macro
> __loongarch_lp64 is defined.
>
> All regression tests of libvtv passed.
>
> === libvtv Summary ===
>
> # of expected passes 176
>
> But I haven't tested the performance yet.
>
> -----------------------------------
> Co-Authored-By: qijingwen <qijing...@loongson.cn>
>
> include/ChangeLog:
>
> * vtv-change-permission.h (defined):
> (VTV_PAGE_SIZE): Under the loongarch64 architecture,
> set VTV_PAGE_SIZE to 64K.
>
> libvtv/ChangeLog:
>
> * configure.tgt: Add loongarch support.
> * vtv_malloc.cc (defined): If macro __loongarch_lp64 is
> defined, then don't check whether VTV_PAGE_SIZE is the
> same as the system page size.
> ---
> include/vtv-change-permission.h | 4 ++++
> libvtv/configure.tgt | 3 +++
> libvtv/vtv_malloc.cc | 5 +++++
> 3 files changed, 12 insertions(+)
>
> diff --git a/include/vtv-change-permission.h
> b/include/vtv-change-permission.h
> index 70bdad92bca..64e419c29d5 100644
> --- a/include/vtv-change-permission.h
> +++ b/include/vtv-change-permission.h
> @@ -48,6 +48,10 @@ extern void __VLTChangePermission (int);
> #else
> #if defined(__sun__) && defined(__svr4__) && defined(__sparc__)
> #define VTV_PAGE_SIZE 8192
> +/* LoongArch architecture 64-bit system supports 4k,16k and 64k
> + page size, which is set to the maximum value here. */
> +#elif defined(__loongarch_lp64)
> +#define VTV_PAGE_SIZE 65536
> #else
> #define VTV_PAGE_SIZE 4096
> #endif
> diff --git a/libvtv/configure.tgt b/libvtv/configure.tgt
> index aa2a3f675b8..6cdd1e97ab1 100644
> --- a/libvtv/configure.tgt
> +++ b/libvtv/configure.tgt
> @@ -50,6 +50,9 @@ case "${target}" in
> ;;
> x86_64-*-darwin[1]* | i?86-*-darwin[1]*)
> ;;
> + loongarch*-*-linux*)
> + VTV_SUPPORTED=yes
> + ;;
> *)
> ;;
> esac
> diff --git a/libvtv/vtv_malloc.cc b/libvtv/vtv_malloc.cc
> index 67c5de6d4e9..45804b8d7f8 100644
> --- a/libvtv/vtv_malloc.cc
> +++ b/libvtv/vtv_malloc.cc
> @@ -212,6 +212,11 @@ __vtv_malloc_init (void)
>
> #if defined (__CYGWIN__) || defined (__MINGW32__)
> if (VTV_PAGE_SIZE != sysconf_SC_PAGE_SIZE())
> +#elif defined (__loongarch_lp64)
> + /* I think that under the LoongArch 64-bit system, VTV_PAGE_SIZE is set
> + to the maximum value of 64K supported by the system, so there is no
> + need to judge here. */
> + if (false)
> #else
> if (VTV_PAGE_SIZE != sysconf (_SC_PAGE_SIZE))
>
Is "if (VTV_PAGE_SIZE != sysconf (_SC_PAGE_SIZE))" going to fail for
loongarch? If not, why do you need to insert anything here at all? If so,
perhaps you could write something similar to sysconf_SC_PAGE_SIZE for
loongarch (as was done for __CYGWIN__ & __MINGW32__)?
-- Caroline
cmt...@google.com
> #endif
> --
> 2.31.1
>
>
