Re: [OE-core] [PATCH 13/20] devtool: ide-sdk: parse Rust debug path remaps

["adrian.freihofer@gmail.com" <adrian.freihofer@gmail.com>]

On Mon, 2026-10-26 at 09:55 +0100, Enguerrand de Ribaucourt via
lists.openembedded.org wrote:
> Use Cargo RUSTFLAGS to populate reverse debug mappings and recognize
> Rust
> --remap-path-prefix alongside the existing GCC prefix-map options.
> The
> following LLDB source-map change depends on these normalized
> mappings.
> 
> AI-Generated: Uses GitHub Copilot
> Signed-off-by: Enguerrand de Ribaucourt
> <enguerrand.de-ribaucourt@savoirfairelinux.com>
> ---
>  scripts/lib/devtool/ide_sdk.py | 14 +++++++++++---
>  1 file changed, 11 insertions(+), 3 deletions(-)
> 
> diff --git a/scripts/lib/devtool/ide_sdk.py
> b/scripts/lib/devtool/ide_sdk.py
> index 44429e80b0..f22a98cedf 100755
> --- a/scripts/lib/devtool/ide_sdk.py
> +++ b/scripts/lib/devtool/ide_sdk.py
> @@ -1140,6 +1140,9 @@ class RecipeModified:
>          if self.build_tool is BuildTool.KERNEL_MODULE:
>              self.reverse_debug_prefix_map =
> self._init_reverse_debug_prefix_map(
>                  self.kernel_cc)
> +        elif self.build_tool is BuildTool.CARGO:
> +            self.reverse_debug_prefix_map =
> self._init_reverse_debug_prefix_map(
> +                self.cargo_rustflags)
>          else:
>              self.reverse_debug_prefix_map =
> self._init_reverse_debug_prefix_map(
>                  recipe_d.getVar('DEBUG_PREFIX_MAP'))
> @@ -1292,15 +1295,20 @@ class RecipeModified:
>          return ':'.join(self.solib_search_path(image))
>  
>      def _init_reverse_debug_prefix_map(self, debug_prefix_map):
> -        """Parses GCC map options and returns a mapping of target to
> host paths.
> +        """Parses compiler map options and returns a mapping of
> target to host paths.
>  
> -        This function scans a string containing GCC options such as
> -fdebug-prefix-map,
> +        This function scans a string containing compiler options
> such as -fdebug-prefix-map,
>          -fmacro-prefix-map, and -ffile-prefix-map (in both '--option
> value' and '--option=value'
>          forms), extracting all mappings from target paths (used in
> debug info) to host source
>          paths. If multiple mappings for the same target path are
> found, the most suitable
>          host path is selected (preferring 'sources' over 'build'
> directories).
>          """
> -        prefixes = ("-fdebug-prefix-map", "-fmacro-prefix-map", "-
> ffile-prefix-map")
> +        prefixes = (
> +            "-fdebug-prefix-map",
> +            "-fmacro-prefix-map",
> +            "-ffile-prefix-map",
> +            "--remap-path-prefix",

mapping.split('=', 1) splits --remap-path-prefix mappings on the first
=, but rustc splits on the last. It only matters for paths containing
=; .

Regards,
Adrian

> +        )
>          all_mappings = {}
>          args = shlex.split(debug_prefix_map)
>          i = 0
> 
> 
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