[PATCH 00/13] Make the C++ name parser recognize more char literal forms

[Simon Marchi <simon.marchi@efficios.com>]

I am trying to fix some bugs in the area of non-type template
parameters.  For example, here is one related bug:

  RTTI symbols not found for non-type templates
  https://sourceware.org/bugzilla/show_bug.cgi?id=19320

It's quite complicated, it seems like I can always come up with some
more corner cases which break any of my attempts fix this generally.  So
I'll start with this series of patches that I am fairly confident are
good in any case.  They teach the C++ name parser to recognize literal
forms that clang emits but GDB does not recognize, such as:

    C<(char)'\xff'>
    C<u'\u0152a'>
    C<L'\U0001f600'>

Recognizing these forms allows GDB to canonicalize these names, makes
some more type lookups succeed, and gets rid the infamous `RTTI symbol
not found for class '...'` error in some cases.

Simon Marchi (13):
  gdb: make demangle_parse_info own the memory its tree points into
  gdb: remove p_allocated_size parameter of gdb_cplus_demangle_print
  gdb: modernize mangled_name_to_comp and cp_class_name_from_physname
  gdb: fix crash in "maint canonicalize" without argument
  gdb: move C++ name parser parsing selftest to its own test
  gdb: check exact results in the canonicalize selftest
  gdb: extract lex_char_literal from cpname_yylex
  gdb: remove \^ escape sequence support from C++ name parser
  gdb: remove backslash-newline handling from cp_parse_escape
  gdb: fix out-of-bounds reads in lex_char_literal
  gdb: handle hexadecimal escapes in C++ name parser
  gdb: handle character literal encoding prefixes in C++ name parser
  gdb: handle universal character names in C++ name parser

 gdb/cp-name-parser.c                          | 325 +++++++++++++-----
 gdb/cp-support.c                              | 131 ++++---
 gdb/cp-support.h                              |  10 +-
 gdb/maint.c                                   |   3 +
 gdb/testsuite/gdb.base/maint.exp              |   1 +
 gdb/testsuite/gdb.cp/nontype-template-rtti.cc |  44 +++
 .../gdb.cp/nontype-template-rtti.exp          |  89 +++++
 .../gdb.dwarf2/nontype-template-lookup.exp    | 113 ++++++
 gdb/testsuite/lib/gdb.exp                     |   7 +
 9 files changed, 561 insertions(+), 162 deletions(-)
 create mode 100644 gdb/testsuite/gdb.cp/nontype-template-rtti.cc
 create mode 100644 gdb/testsuite/gdb.cp/nontype-template-rtti.exp
 create mode 100644 gdb/testsuite/gdb.dwarf2/nontype-template-lookup.exp


base-commit: d74cbaa58f3a8771cb7dd0191b45e3d5b5c5dbbd
-- 
2.56.0