LLVM-DWARFUTIL(1) LLVM LLVM-DWARFUTIL(1)
NAME
llvm-dwarfutil - A tool to copy and manipulate debug info
SYNOPSIS
llvm-dwarfutil [options] input output
DESCRIPTION
llvm-dwarfutil is a tool to copy and manipulate debug info.
In basic usage, it makes a semantic copy of the input to the output. If
any options are specified, the output may be modified along the way,
e.g. by removing unused debug info.
If “-” is specified for the input file, the input is read from the pro-
gram’s standard input stream. If “-” is specified for the output file,
the output is written to the standard output stream of the program.
The tool is still in active development.
COMMAND-LINE OPTIONS
--garbage-collection
Removes pieces of debug information related to discarded sec-
tions. When the linker does section garbage collection the
abandoned debug info is left behind. Such abandoned debug info
references address ranges using tombstone values. Thus, when
this option is specified, the tool removes debug info which is
marked with the tombstone value.
That option is enabled by default.
--odr-deduplication
Remove duplicated types (if “One Definition Rule” is supported
by source language). Keeps first type definition and removes
other definitions, potentially significantly reducing the size
of output debug info.
That option is enabled by default.
--help, -h
Print a summary of command line options.
--no-garbage-collection
Disable --garbage-collection.
--no-odr-deduplication
Disable --odr-deduplication.
--no-separate-debug-file
Disable --separate-debug-file.
--num-threads=<n>, -j
Specifies the maximum number (n) of simultaneous threads to use
for processing.
--separate-debug-file
Generate separate file containing output debug info. Using
llvm-dwarfutil with that option equals to the following set of
commands:
:program:`llvm-objcopy` --only-keep-debug in-file out-file.debug
:program:`llvm-objcopy` --strip-debug in-file out-file
:program:`llvm-objcopy` --add-gnu-debuglink=out-file.debug out-file
--tombstone=<value>
<value> can be one of the following values:
• bfd: zero for all addresses and [1,1] for DWARF v4 (or
less) address ranges and exec.
• maxpc: -1 for all addresses and -2 for DWARF v4 (or less)
address ranges.
• universal: both bfd and maxpc.
• exec: match with address ranges of executable sections.
The value universal is used by default.
--verbose
Enable verbose logging. This option disables multi-thread mode.
--verify
Run the DWARF verifier on the output DWARF debug info.
--version
Print the version of this program.
SUPPORTED FORMATS
The following formats are currently supported by llvm-dwarfutil:
ELF
EXIT STATUS
llvm-dwarfutil exits with a non-zero exit code if there is an error.
Otherwise, it exits with code 0.
BUGS
To report bugs, please visit <-
https://github.com/llvm/llvm-project/labels/tools:llvm-dwarfutil/>.
AUTHOR
Maintained by the LLVM Team (https://llvm.org/).
COPYRIGHT
2003-2023, LLVM Project
15 2023-10-16 LLVM-DWARFUTIL(1)
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