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Re: Systemtap out of date and not working

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	Hi.

On Sat, Dec 23, 2017 at 04:09:56PM -0500, Farhan Khan wrote:
> Hi all,
> 
> SystemTap on Debian is version 2.9/0.165.

Not unless you're running pre-stretch testing.
stretch's current is 3.1.

>The current version is 3.2.

Maybe.

> SystemTap works by compiling a custom kernel module against the source and
> installing it.

If you want to do it the hard way - sure.
Installing linux-image-$(uname -r)-dbg and linux-headers-$(uname -r) is
sufficient for us mere mortals.

> However, the kernel structure has since updated and
> Systemtap 2.9 will not compile against newer kernels. As a result,
> SystemTap DOES NOT WORK.

It does for me:

# stap -v -e 'probe vfs.read {printf("read performed\n"); exit()}'
Pass 1: parsed user script and 465 library scripts using 113916virt/46508res/6236shr/40564data kb, in 170usr/30sys/330real ms.
Pass 2: analyzed script: 1 probe, 1 function, 7 embeds, 0 globals using 272244virt/206636res/7848shr/198892data kb, in 1790usr/350sy s/5811real ms.
Pass 3: translated to C into
"/tmp/stapT5s2PF/stap_de69e8c4da8ac792e5b3974a3cb63db7_2549_src.c" using 272244virt/206832res/8044shr/1 98892data kb, in 0usr/0sys/4real ms.
Pass 4: compiled C into "stap_de69e8c4da8ac792e5b3974a3cb63db7_2549.ko" in 9050usr/480sys/11001real ms.
Pass 5: starting run.
read performed
Pass 5: run completed in 0usr/20sys/367real ms.

# uname -a
Linux stretch 4.9.0-4-amd64 #1 SMP Debian 4.9.65-3+deb9u1 (2017-12-23) x86_64 GNU/Linux

> This can only be resolved except by updating to a
> newer version of systemtap.

'apt-get update && apt-get upgrade' solves this for me usually.
Consider trying it.

Reco

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Systemtap out of date and not working Farhan Khan <khanzf@gmail.com> - 2017-12-23 22:30 +0100
  Re: Systemtap out of date and not working Reco <recoverym4n@gmail.com> - 2017-12-23 23:30 +0100

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