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Re: Recent aarch64 kprobes and uprobes patch systemtap testing
- From: David Smith <dsmith at redhat dot com>
- To: William Cohen <wcohen at redhat dot com>, systemtap at sourceware dot org
- Cc: Dave Long <dave dot long at linaro dot org>, Pratyush Anand <panand at redhat dot com>
- Date: Fri, 11 Dec 2015 11:23:44 -0600
- Subject: Re: Recent aarch64 kprobes and uprobes patch systemtap testing
- Authentication-results: sourceware.org; auth=none
- References: <5669DF98 dot 3030601 at redhat dot com>
On 12/10/2015 02:24 PM, William Cohen wrote:
> Hi All,
>
> Dave Long and Pratyush Anand have been working on kprobe and uprobe patches for aarch64. I have built a local version the uprobe/upstream_arm64_devel branch of https://github.com/pratyushanand/linux which includes those patches in a linux-4.4.0-rc3 kernel.
>
> The tests seemed to run fairly well and the results have been uploaded to dejazilla:
>
> https://web.elastic.org/~dejazilla/viewsummary.php?summary=%3D%27%3C56698DCC.3090207%40redhat.com%3E%27
... stuff deleted ...
> Also a number of network tests failed like the following
>
> TEST PWD=/root/systemtap_write/systemtap/testsuite/systemtap.examples/network
> meta taglines 'test_check: stap -g -p4 netfilter_drop.stp TCP 1' tag 'test_check' value 'stap -g -p4 netfilter_drop.stp TCP 1'
> attempting command stap -g -p4 netfilter_drop.stp TCP 1
> OUT /tmp/stapbIEqFl/stap_0c0db8521e3ea3b2d26dcde208a77baf_21082_src.c:2731:1: error: initialization from incompatible pointer type [-Werror]
> .hook = enter_netfilter_probe_0,
> ^
> /tmp/stapbIEqFl/stap_0c0db8521e3ea3b2d26dcde208a77baf_21082_src.c:2731:1: error: (near initialization for 'netfilter_opts_0.hook') [-Werror]
> /tmp/stapbIEqFl/stap_0c0db8521e3ea3b2d26dcde208a77baf_21082_src.c:2732:1: error: unknown field 'owner' specified in initializer
> .owner = THIS_MODULE,
> ^
> /tmp/stapbIEqFl/stap_0c0db8521e3ea3b2d26dcde208a77baf_21082_src.c:2732:1: error: initialization from incompatible pointer type [-Werror]
> /tmp/stapbIEqFl/stap_0c0db8521e3ea3b2d26dcde208a77baf_21082_src.c:2732:1: error: (near initialization for 'netfilter_opts_0.dev') [-Werror]
> cc1: all warnings being treated as errors
> make[4]: *** [/tmp/stapbIEqFl/stap_0c0db8521e3ea3b2d26dcde208a77baf_21082_src.o] Error 1
> make[3]: *** [_module_/tmp/stapbIEqFl] Error 2
> WARNING: kbuild exited with status: 2
> Pass 4: compilation failed. [man error::pass4]
This appears to be a problem with 4.4 kernels in general, not just an
aarch64 problem. It also happens on rawhide x86_64. It appears that the
kernel has had some changes in the area of netfilter probes.
I filed PR19358 on this issue.
--
David Smith
dsmith@redhat.com
Red Hat
http://www.redhat.com
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