linux-kernel - Re: [PATCH 6/6] selftests/sgx: Add a bpftrace script for tracking allocation errors

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Message-ID: <Yw7IZWHbHjdjMa/Y@kernel.org>
Date:   Wed, 31 Aug 2022 05:33:09 +0300
From:   Jarkko Sakkinen <jarkko@...nel.org>
To:     Reinette Chatre <reinette.chatre@...el.com>
Cc:     linux-sgx@...r.kernel.org,
        Haitao Huang <haitao.huang@...ux.intel.com>,
        Vijay Dhanraj <vijay.dhanraj@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Shuah Khan <shuah@...nel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>
Subject: Re: [PATCH 6/6] selftests/sgx: Add a bpftrace script for tracking
 allocation errors

On Tue, Aug 30, 2022 at 03:57:24PM -0700, Reinette Chatre wrote:
> Hi Jarkko,
> 
> On 8/29/2022 8:12 PM, Jarkko Sakkinen wrote:
> > Signed-off-by: Jarkko Sakkinen <jarkko@...nel.org>
> > ---
> >  tools/testing/selftests/sgx/alloc-error.bt | 7 +++++++
> >  1 file changed, 7 insertions(+)
> >  create mode 100644 tools/testing/selftests/sgx/alloc-error.bt
> > 
> > diff --git a/tools/testing/selftests/sgx/alloc-error.bt b/tools/testing/selftests/sgx/alloc-error.bt
> > new file mode 100644
> > index 000000000000..9268d50dea29
> > --- /dev/null
> > +++ b/tools/testing/selftests/sgx/alloc-error.bt
> > @@ -0,0 +1,7 @@
> > +kr:sgx_alloc_epc_page /(uint64)retval >= (uint64)(-4095)/ {
> > +		 printf("sgx_alloc_epc_page: retval=%d\n", (int64)retval);
> > +}
> > +
> > +kr:sgx_encl_page_alloc /(uint64)retval >= (uint64)(-4095)/ {
> > +		 printf("sgx_encl_page_alloc: retval=%d\n", (int64)retval);
> > +}
> 
> 
> Could there be a snippet of comments in this new file to guide users
> on how to use this script?

Do not mean to be rude but I'm not sure what there is to guide but
I'm open for ideas.

BR, Jarkko