Installing debug symbols on Ubuntu

When using perf one needs the debug symbols installed to get the function names in the perf capture.

Step 1: GPG key import

Make sure that you have the GPG key of your system. For Ubuntu 16.04 and higher:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys C8CAB6595FDFF622

For older distributions:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys ECDCAD72428D7C01

Step 2: Add repository config

codename=$(lsb_release -c | awk  '{print $2}')
sudo tee /etc/apt/sources.list.d/ddebs.list << EOF
deb http://ddebs.ubuntu.com/ ${codename}      main restricted universe multiverse
deb http://ddebs.ubuntu.com/ ${codename}-security main restricted universe multiverse
deb http://ddebs.ubuntu.com/ ${codename}-updates  main restricted universe multiverse
deb http://ddebs.ubuntu.com/ ${codename}-proposed main restricted universe multiverse
EOF

Step 3: Update packages

sudo apt-get update

Step 4: Download and install the debugging symbols

sudo apt-get install linux-image-$(uname -r)-dbgsym

Reference: https://hadibrais.wordpress.com/2017/03/13/installing-ubuntu-kernel-debugging-symbols/