Re: [PATCH 0/5] Add strace support for printing arguments of selected syscalls

["Alex Bennée" <alex.bennee@linaro.org>]

Filip Bozuta <filip.bozuta@syrmia.com> writes:

> From: Filip Bozuta <Filip.Bozuta@syrmia.com>
>
> This series covers strace support for printing arguments of following syscalls:
>
>     *acct()         *lgetxattr()        *lseek()
>     *fsync()        *fgetxattr()        *chown()
>     *fdatasync()    *listxattr()        *lchown()
>     *listen()       *llistxattr()       *fallocate()
>     *getxattr()     *flistxattr()
>
> The implementation details for strace support is described in this series patch
> commit messages.
>
> Testing method:
>
>     Mini test programs were written that run these syscalls for different arguments.
>     Those programs were compiled (sometimes using cross-compilers) for the following
>     architectures:

How big is this mini-test? Is it worth adding to tests/tcg?

>
>         * Intel 64-bit (little endian) (gcc)
>         * Power pc 32-bit (big endian) (powerpc-linux-gnu-gcc)
>         * Power pc 64-bit (big endian) (powerpc64-linux-gnu-gcc)
>         * Mips 32-bit (little endian) (mipsel-linux-gnu-gcc)
>         * Mips 64-bit (little endian) (mips64el-linux-gnuabi64-gcc)
>
>     The corresponding native programs were executed with strace, without using
>     QEMU, on Intel Core i7-4790K (x86_64) host.
>
>     All applicable compiled programs were in turn executed with "-strace"
>     through QEMU and the strace printing results obtained were the same 
>     ones gotten for native execution.

If we have reference traces from real HW we can compare them using
diff-out or conditional-diff-out make rules. See the run-float_%:
float_% rules in tests/tcg/multiarch/Makefile.target.

>
> Filip Bozuta (5):
>   linux-user: Add strace support for a group of syscalls
>   linux-user: Add strace support for printing argument of syscalls used
>     for extend attributes
>   linux-user: Add strace support for printing arguments of lseek()
>   linux-user: Add strace support for printing arguments of
>     chown()/lchown()
>   linux-user: Add strace support for printing arguments of fallocate()
>
>  linux-user/strace.c    | 174 +++++++++++++++++++++++++++++++++++++++++
>  linux-user/strace.list |  28 +++----
>  2 files changed, 188 insertions(+), 14 deletions(-)


-- 
Alex Bennée