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  program’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 sections.  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

       2003-2022, LLVM Project