[PATCH dwarves 0/2] dwarf_loader: improve cus__merging_cu()

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Function cus__merging_cu() is introduced in Commit 39227909db3c
("dwarf_loader: Permit merging all DWARF CU's for clang LTO built
binary") to test whether cross-cu references may happen.
The original implementation anticipates compilation flags
in dwarf, but later some concerns about binary size surfaced
and the decision is to scan .debug_abbrev as a faster way
to check cross-cu references. Also putting a note in vmlinux
to indicate whether lto is enabled for built or not can
provide a much faster way.

This patch set implemented this two approaches, first
checking the note (in Patch #2), if not found, then
check .debug_abbrev (in Patch #1).

Yonghong Song (2):
  dwarf_loader: check .debug_abbrev for cross-cu references
  dwarf_loader: check .notes section for lto build info

 dwarf_loader.c | 76 ++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 55 insertions(+), 21 deletions(-)

-- 
2.30.2





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