I was wrong. `/usr/bin/perf` is just a shell script calling a kernel specific
version.
The real executable is in `linux-hwe-tools-4.**`.
I checked the source of `linux-hwe-tools-4.15.0-36` and it already has the
necessary fix.
Rebuilding just the perf executable from withhin the source dir resulted in a
binary with correct demangling support.
```
apt-get source linux-hwe-tools-4.15.0-36
sudo apt-get build-dep linux-hwe-tools-4.15.0-36
cd linux-hwe-4.15.0/tools/perf && make
```
However rebuilding and installing the package `linux-hwe-tools-4.15.0-36`
resulted in a different binary with still broken demangling. I don’t know
what’s the reason for that.
```
apt-get source linux-hwe-tools-4.15.0-36
sudo apt-get build-dep linux-hwe-tools-4.15.0-36
cd linux-hwe-4.15.0 && debuild -us -uc -b
sudo dpkg -i ../linux-hwe-tools-4.15.0-36_4.15.0-36.39~16.04.1_amd64.deb
../linux-tools-4.15.0-36-generic_4.15.0-36.39~16.04.1_amd64.deb
```
** Also affects: linux-hwe (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: linux-meta-hwe (Ubuntu)
** No longer affects: linux-meta-hwe (Ubuntu Xenial)
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https://bugs.launchpad.net/bugs/1396654
Title:
C++ demangling support missing from perf
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