https://sourceware.org/bugzilla/show_bug.cgi?id=20876
Mark Wielaard <mark at klomp dot org> changed:
What |Removed |Added
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CC| |mark at klomp dot org
--- Comment #3 from Mark Wielaard <mark at klomp dot org> ---
Just a note that elfutils searches only the (global?) absolute debuginfo paths
directly.
So given the default of "":.debug:/usr/lib/debug", it skips the "" relative cwd
and the ".debug" postfix, but only tries /usr/lib/debug/.build-id/xx/yyyy.debug
So the search strategy of elfutils for a separate .debug file given a build-id
xxyyyy and a list of debuginfo search paths is to take the absolute paths
(starting with '/') and trying /path/.build-id/xx/yyyy.debug. Where the default
list of (absolute) debuginfo search paths is just "/usr/lib/debug". It then
takes the canonicalize_file_name assuming it might be a symlink and the user
might find the resolved name more interesting. As a sanity check elfutils also
only allows build-ids that are at a minimum 4 and at a maximum 64 hex
characters long. It does normally also verify that the found file does contain
the build-id it should and reject the file if it doesn't.
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