Bug 827151

Summary: perf diff ends with segfault
Product: [Fedora] Fedora Reporter: Camilo Bernal <cabernal>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 16CC: gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, mbenitez
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-09-06 14:24:38 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Camilo Bernal 2012-05-31 18:21:24 UTC 
Description of problem:
perf code dumps when displaying the performance difference amongst two perf.data files.


Version-Release number of selected component (if applicable):

Linux version 3.3.5-2.fc16.x86_64 
perf version 3.3.7-1.fc16.x86_64


How reproducible:
Always.

Steps to Reproduce:
1. compile simple C/C++ program to executable a.out,
2. Build perf.data files:
       perf record ./a.out; perf record ./a.out
3. perf diff perf.data perf.data.old
  
Actual results:

[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.015 MB perf.data (~650 samples) ]
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.015 MB perf.data (~650 samples) ]
Segmentation fault (core dumped)

# echo $?
139

Expected results:
Should display display the performance difference amongst two perf.data files, without the core dump.

Additional info:

Above test also fails on Fedora 17.

Linux version 3.3.4-5.fc17.x86_64
perf version 3.3.7-1.fc17.x86_64
Comment 1 Josh Boyer 2012-09-06 14:24:38 UTC 
I can't recreate this on a 3.4 or 3.5 version of perf.  F16 is on 3.4 at the moment, so it appears it was fixed upstream.  If you can recreate it with 3.4.9 or 3.5.3, please reopen.