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| author | John M Mellor-Crummey <johnmc@rice.edu> | 2021-10-20 18:19:38 -0500 |
|---|---|---|
| committer | Mark Wielaard <mark@klomp.org> | 2021-11-10 11:03:32 +0100 |
| commit | dbd44e96f101a81f387ca6ff46910ab74ed7b1dc (patch) | |
| tree | 062f1ea987223df99a9dae87aaa4a9e25c294b00 /NEWS | |
| parent | 5b21e70216b853065fa2fef34273db5f7dcdc88b (diff) | |
| download | elfutils-dbd44e96f101a81f387ca6ff46910ab74ed7b1dc.tar.gz | |
libdw, readelf: Read inlining info in NVIDIA extended line map
As of CUDA 11.2, NVIDIA added extensions to the line map section
of CUDA binaries to represent inlined functions. These extensions
include
- two new fields in a line table row to represent inline
information: context, and functionname,
- two new DWARF extended opcodes: DW_LNE_NVIDIA_inlined_call,
DW_LNE_NVIDIA_set_function_name,
- an additional word in the line table header that indicates
the offset in the .debug_str function where the function
names for this line table begin, and
A line table row for an inlined function contains a non-zero "context"
value. The “context” field indicates the index of the line table row
that serves as the call site for an inlined context.
The "functionname" field in a line table row is only meaningful if the
"context" field of the row is non-zero. A meaningful "functionname"
field contains an index into the .debug_str section relative to the
base offset established in the line table header; the position in the
.debug_str section indicates the name of the inlined function.
These extensions resemble the proposed DWARF extensions
(http://dwarfstd.org/ShowIssue.php?issue=140906.1) by Cary Coutant,
but are not identical.
This commit integrates support for handling NVIDIA's extended line
maps into elfutil's libdw library, by adding two functions
dwarf_linecontext and dwarf_linefunctionname, and the readelf
--debug-dump=line command line utility.
Signed-off-by: John M Mellor-Crummey <johnmc@rice.edu>
Signed-off-by: Mark Wielaard <mark@klomp.org>
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -16,6 +16,11 @@ debuginfod: Supply extra HTTP response headers, describing archive/file Limit the duration of groom ops roughly to rescan (-t) times. Several other performance improvements & prometheus metrics. +libdw: Support for the NVIDIA Cuda line map extensions. + DW_LNE_NVIDIA_inlined_call and DW_LNE_NVIDIA_set_function_name + are defined in dwarf.h. New functions dwarf_linecontext and + dwarf_linefunctionname + Version 0.185 debuginfod-client: Simplify curl handle reuse so downloads which |