[Crash-utility] [PATCH 0/1] struct: add -F source-file scoping for duplicate datatype names

When different source files define same-name struct/union tags, crash may resolve an unintended candidate because default type lookup depends on symbol lookup order/context. This series adds `struct/union -F <file_name>` to constrain datatype lookup to the compilation-unit scope matched by the requested source file. For example, this avoids ambiguity for duplicate tags such as `arm_smmu_device` defined in both `arm-smmu.c` and `arm-smmu-v3.c`. Implementation summary: - Parse `-F` in `struct`/`union` command path and propagate `source_file` in gdb requests. - In gdb-side patch code, map source file -> unique scope block (`objfile -> compunit -> filetabs -> blockvector`), prefer `STATIC_BLOCK` and fallback to `GLOBAL_BLOCK`. - Apply the scope temporarily for the request and restore previous scope automatically afterward. - If file match is missing or ambiguous, fail explicitly instead of choosing a random candidate. - Note: `-F` may add a small lookup-time overhead due to extra scope scanning and symbol-table expansion needed for deterministic file-scoped matching. Compatibility: - Existing behavior is unchanged when `-F` is not used. - Existing `STRUCT_SIZE/MEMBER_OFFSET/...` call paths remain compatible. - For external/plugin callers that need file-scoped lookup with minimal changes, expose two helper APIs: - `char *set_temporary_datatype_filename(const char *source_file);` - `void restore_datatype_filename(char *saved_source_file);` chahuan (1): struct: add -F source-file scoping for duplicate datatype names cmdline.c | 1 + defs.h | 4 ++ gdb-16.2.patch | 166 ++++++++++++++++++++++++++++++++++++++++++++++-- gdb_interface.c | 6 ++ help.c | 8 ++- symbols.c | 31 ++++++++- 6 files changed, 206 insertions(+), 10 deletions(-) -- 2.43.0