* [Bug libdw/28573] New: Provide an dwarf_begin interface to open (single-file) DWO or GNU_LTO Dwarf subset
@ 2021-11-09 18:13 mark at klomp dot org
0 siblings, 0 replies; only message in thread
From: mark at klomp dot org @ 2021-11-09 18:13 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=28573
Bug ID: 28573
Summary: Provide an dwarf_begin interface to open (single-file)
DWO or GNU_LTO Dwarf subset
Product: elfutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: libdw
Assignee: unassigned at sourceware dot org
Reporter: mark at klomp dot org
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
To fix https://sourceware.org/bugzilla/show_bug.cgi?id=27367 "invalid loclists
data with -ffat-lto-objects" dwarf_begin_elf now checks to see which DWARF
subset is in the debug ELF file. And it picks the "plain" (.debug sections)
over "dwo" (.debug_...dwo sections) over "lto" (.gnu.debuglto_.debug sections)
in case multiple are in the same file. We have to pick one because mixing the
sections causes chaos.
But the user might want to pick a different set. In particular the user might
want to pick "single file" DWO (where the .dwo sections are in the same file as
the skeleton plain debug sections).
So we want to have a dwarf_begin variant with a flag to pick such a subset.
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