linux-kernel - Re: [PATCH v2 0/3] Perf support to SDT markers

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Message-ID: <y0m38odytfm.fsf@fche.csb>
Date:	Mon, 07 Oct 2013 11:47:09 -0400
From:	fche@...hat.com (Frank Ch. Eigler)
To:	Hemant Kumar <hkshaw@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, srikar@...ux.vnet.ibm.com,
	peterz@...radead.org, oleg@...hat.com,
	hegdevasant@...ux.vnet.ibm.com, mingo@...hat.com, anton@...hat.com,
	systemtap@...rceware.org, namhyung@...nel.org,
	masami.hiramatsu.pt@...achi.com, aravinda@...ux.vnet.ibm.com
Subject: Re: [PATCH v2 0/3] Perf support to SDT markers

Hemant Kumar <hkshaw@...ux.vnet.ibm.com> writes:

> [...]
> A simple example to show this follows.
> - Create a file with .d extension and mention the probe names in it with
> provider name and marker name.
> [...]
> - Now create the probes.h and probes.o file :
> $ dtrace -C -h -s probes.d -o probes.h
> $ dtrace -C -G -s probes.d -o probes.o
> [...]

It may be worthwhile to document an even-simpler case:

- no .d file
- no invocation of the dtrace python script
- no generated .h or .o file
- in the C file, just add:

  #include <sys/sdt.h>

  void main () {
       /* ... */
       STAP_PROBE(provider_name,probe_name);
       /* ... */
  }

- gcc file.c
- stap -l 'process("./a.out").mark("*")' to list


- FChE
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