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<p class="MsoNormal">Dear All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I like to propose a change to strace version 4.15 that re-enacts the currently hidden -z option for output filtering (“print successful syscalls only”).
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Please find attached a patch file against 4.15 release that implements a staging approach, i.e. builds output in memory but prints successful syscalls only when the -z option was given on the cmdline. The implementation is based on the
STDIO library function open_memstream(); since it might not be available all every target system, respective code sections were guarded with "#ifdef _GNU_SOURCE" directives. To apply the patchfile:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> cd strace-4.15<o:p></o:p></p>
<p class="MsoNormal"> patch -p1 <strace-4.15i1.patch<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Note 1: Since the syserror macro (defined in defs.h) does not distinguish between failed and not-returned, the "exit_group()" syscall will be filtered as well with -z.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Note 2: automake would not run on my system, therefore the patch has both Makefile.in and Makefile.am. The latter was not tested.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best regards,<o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-GB">Burkhard Kohl<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><a href="mailto:Burkhard.Kohl@intel.com"><span style="font-size:8.0pt;font-family:"Times New Roman",serif;color:blue;mso-fareast-language:EN-GB">mailto:Burkhard.Kohl@intel.com</span></a><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Intel Deutschland GmbH<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Registered Address: Am Campeon 10-12, 85579 Neubiberg, Germany<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Tel: +49 89 99 8853-0,
</span><a href="http://www.intel.de"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:blue">www.intel.de</span></a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p><font style="font-size: 9px;">Intel Deutschland GmbH<br>
Registered Address: Am Campeon 10-12, 85579 Neubiberg, Germany<br>
Tel: +49 89 99 8853-0, www.intel.de<br>
Managing Directors: Christin Eisenschmid, Christian Lamprechter<br>
Chairperson of the Supervisory Board: Nicole Lau<br>
Registered Office: Munich<br>
Commercial Register: Amtsgericht Muenchen HRB 186928</font><br>
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