group.of.nepali.translators team mailing list archive

[Matthias Klose <doko@xxxxxxxxxx>]

** Also affects: libunwind (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

-- 
You received this bug notification because you are a member of नेपाली
भाषा समायोजकहरुको समूह, which is subscribed to Xenial.
Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1590236

Title:
  perf --call-graph dwarf doesn't record correct call graph

Status in libunwind package in Ubuntu:
  Confirmed
Status in linux package in Ubuntu:
  Confirmed
Status in libunwind source package in Xenial:
  New
Status in linux source package in Xenial:
  New

Bug description:
  1. What you expected to happen
  Profiling program by "perf --call-graph dwarf" shows correct call-graph in perf report

  2. What actually happened
  perf report doesn't show correct call graph. Then perf is re-builded from source. During building, perf configure detection says stock libunwind's debug_frame feature is not enabled. It leads perf can't record program's call-graph correctly.

  3. How it is solved on my local machine
    a. get libunwind source by apt-get source libunwind-dev. 
    b. enable CONFIG_DEBUG_FRAME in libunwind configuration: autoreconfig -i && ./configure --enable-debug-frame
    c. build libunwind and install it to /usr/lib/local
    d. get kernel source by apt-get source linux and compile perf with following command:
         CFLAGS=-I/usr/local/include/ LDFLAGS="-lunwind -L/usr/local/lib/" make
    e. perf call-graph works!

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: libunwind-dev (not installed)
  ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
  Uname: Linux 4.4.0-22-generic aarch64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: arm64
  Date: Wed Jun  8 03:33:05 2016
  JournalErrors:
   Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
         Users in the 'systemd-journal' group can see all messages. Pass -q to
         turn off this notice.
   No journal files were opened due to insufficient permissions.
  SourcePackage: libunwind
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/libunwind/+bug/1590236/+subscriptions