llvm / llvm/llvm-project

[llvm-addr2line] configuration errors from perf when used over regular addr2line

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tools:llvm-symbolizer/addr2line
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LLVM
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Description

When collecting perf samples, like so:
`perf record --latency --call-graph=dwarf --output=/tmp/perf.data `

There are config errors with llvm-addr2line that don't appear to be present with the gnu addr2line:
`addr2line_configure /location/of/elf: addr2line configuration failed`

perf appears to be invoking addr2line like so according to `ps aux`:
`addr2line -e /location/of/elf -a -i -f`

It's possible that something changed in the hwe kernel's perf.

My setup:

Ubuntu 24.04
kernel: 6.17.0-14-generic
perf: 6.17.9
llvm-addr2line: Ubuntu LLVM version 21.1.8 (from apt repository)

Contributor guide

Open the contributing guide

Research direction

Reproduce the reported perf invocation on Ubuntu 24.04, then run the shown `addr2line -e /location/of/elf -a -i -f` command directly with llvm-addr2line and GNU addr2line for comparison. Trace the llvm-addr2line configuration failure from that command entry point; done means the perf-style invocation no longer reports a configuration error and remains compatible with the expected addr2line options.

Written by the indexing model from the issue text.

Assessment

Tech stack
linux, ubuntu
Domain
cli, tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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