https://sourceware.org/bugzilla/show_bug.cgi?id=25548
Bug ID: 25548
Summary: also support canonicalized source-file name lookups in
webapi
Product: elfutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: debuginfod
Assignee: unassigned at sourceware dot org
Reporter: fche at redhat dot com
CC: elfutils-devel at sourceware dot org,
jan.kratochvil at redhat dot com, kkleine at redhat dot com
Target Milestone: ---
It turns out that some debuginfo consumers canonicalize source-code file names
by the time they get the convenient chance to fall back to debuginfod. This
means that path substrings that POSIX defines as no-ops are lost. debuginfod
should extend a gracious embrace to these tools by also permitting such paths
to be used during the /buildid/hexcode/source/PATH webapi.
Implementing this should not be too hard. The dwarf_extract_source_paths could
add both waldo and a new canonicalize_posix_path(waldo) to the returned
debug_sourcefiles[] set. That's it.
The canonicalize_posix_path() function would perform these textual rewrites,
repeating until convergence:
/./ -> /
/FOO/../ -> / # NB: FOO must not be . or .. because /../../ != /
// -> /
(realpath(3) is not helpful because it looks at the host filesystem to do
resolution, which we cannot when dealing with archive-resident file names.)
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