[PATCH v6 0/3] Introduce syntax for linker-namespace specific symbols

[Guinevere Larsen <guinevere@redhat.com>]

This series adds support for the syntax [[N]]::foo to find symbols that
belong to specific namespaces, while also making GDB's behavior more
consistent when a namespace is not specified. This needs one preparatory
patch and 2 patches actually implementing this feature

Patch 1 is an essential fix, updating how we calculate a variable's copy
relocation to take linker namespaces into account.

Patches 2 and 3 implement the new syntax, adding the necessary
supporting code and updating error messages when symbols can't be found
- where it made sense.

Changes for v6:
* Rebased on master
* Fixed a crash when using the [[N]]::foo syntax before starting the
  inferior

Changes for v5:
* fixed crash when getting the value of a variable before the inferior
  starts.
* Rebased on master

Changes for v4:
* Fixed final documentation feedback from Eli.
* Changed error message when [[N]]::foo::bar fails to find 'foo'.
* Fixed build breakage.

Changes for v3:
* Removed previous patches 1 and 2, as Simon's recently merged patches
  already did those in a better way.
* parser_state now also takes the current solib_ops, since that can't be
  obtained from gdbarch anymore.

Changes for v2:
* solib_supports_linker_namespaces now always expects a pointer.
* Previous patches 2 and 3 were dropped.
* lookup_minimal_symbol_linkage now takes an array_view.
* created new tokens for [[ and ]], to ensure that [[N]] looks like
  that.
* Fixed formatting nits from Eli.

Guinevere Larsen (3):
  gdb: make lookup_minimal_symbol_linkage work with linker namespaces
  gdb: Make the parser recognize the [[N]] syntax for variables
  gdb: extend the [[N]]::foo syntax for files

 gdb/NEWS                                     |   6 +
 gdb/c-exp.y                                  |  88 +++++++++---
 gdb/doc/gdb.texinfo                          |   6 +
 gdb/dwarf2/ada-imported.c                    |   8 +-
 gdb/linespec.c                               |   4 +-
 gdb/minsyms.c                                | 139 ++++++++++++-------
 gdb/minsyms.h                                |  17 ++-
 gdb/parse.c                                  |   3 +-
 gdb/parser-defs.h                            |  39 +++++-
 gdb/rust-parse.c                             |   3 +-
 gdb/solib-svr4.c                             |  20 ---
 gdb/solib.c                                  |  86 +++++++++++-
 gdb/solib.h                                  |  19 +++
 gdb/symtab.c                                 |  76 ++++++++--
 gdb/symtab.h                                 |  15 +-
 gdb/testsuite/gdb.base/dlmopen-ns-ids-lib.c  |  14 ++
 gdb/testsuite/gdb.base/dlmopen-ns-ids-main.c |   3 +
 gdb/testsuite/gdb.base/dlmopen-ns-ids.exp    |  65 +++++++++
 18 files changed, 499 insertions(+), 112 deletions(-)


base-commit: 0633b78640dc892265d148f24881d544d4ddd16e
-- 
2.51.0