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GDB is currently not aware that wchar_t is a built-in type in C++ mode. This is usually not a problem because the debug info describes the type, so when you have a program loaded, you don't notice this. However, if you try expressions involving wchar_t before a program is loaded, gdb errors out: (gdb) p (wchar_t)-1 No symbol table is loaded. Use the "file" command. (gdb) p L"hello" No type named wchar_t. (gdb) ptype L"hello" No type named wchar_t. This commit teaches gdb about the type. After: (gdb) p (wchar_t)-1 $1 = -1 L'\xffffffff' (gdb) p L"hello" $2 = L"hello" (gdb) ptype L"hello" type = wchar_t [6] Unlike char16_t/char32_t, unfortunately, the underlying type of wchar_t is implementation dependent, both size and signness. So this requires adding a couple new gdbarch hooks. I grepped the GCC code base for WCHAR_TYPE and WCHAR_TYPE_SIZE, and it seems to me that the majority of the ABIs have a 4-byte signed wchar_t, so that's what I made the default for GDB too. And then I looked for which ports have a 16-bit and/or unsigned wchar_t, and made GDB follow suit. gdb/ChangeLog: 2017-04-12 Pedro Alves <palves@redhat.com> PR gdb/21323 * c-lang.c (cplus_primitive_types) <cplus_primitive_type_wchar_t>: New enum value. (cplus_language_arch_info): Register cplus_primitive_type_wchar_t. * gdbtypes.h (struct builtin_type) <builtin_wchar>: New field. * gdbtypes.c (gdbtypes_post_init): Create the "wchar_t" type. * gdbarch.sh (wchar_bit, wchar_signed): New per-arch values. * gdbarch.h, gdbarch.c: Regenerate. * aarch64-tdep.c (aarch64_gdbarch_init): Override gdbarch_wchar_bit and gdbarch_wchar_signed. * alpha-tdep.c (alpha_gdbarch_init): Likewise. * arm-tdep.c (arm_gdbarch_init): Likewise. * avr-tdep.c (avr_gdbarch_init): Likewise. * h8300-tdep.c (h8300_gdbarch_init): Likewise. * i386-nto-tdep.c (i386nto_init_abi): Likewise. * i386-tdep.c (i386_go32_init_abi): Likewise. * m32r-tdep.c (m32r_gdbarch_init): Likewise. * moxie-tdep.c (moxie_gdbarch_init): Likewise. * nds32-tdep.c (nds32_gdbarch_init): Likewise. * rs6000-aix-tdep.c (rs6000_aix_init_osabi): Likewise. * sh-tdep.c (sh_gdbarch_init): Likewise. * sparc-tdep.c (sparc32_gdbarch_init): Likewise. * sparc64-tdep.c (sparc64_init_abi): Likewise. * windows-tdep.c (windows_init_abi): Likewise. * xstormy16-tdep.c (xstormy16_gdbarch_init): Likewise. gdb/testsuite/ChangeLog: 2017-04-12 Pedro Alves <palves@redhat.com> PR gdb/21323 * gdb.cp/wide_char_types.c: Include <wchar.h>. (wchar): New global. * gdb.cp/wide_char_types.exp (wide_char_types_program) (do_test_wide_char, wide_char_types_no_program, top level): Add wchar_t testing. |
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bfd | ||
binutils | ||
config | ||
cpu | ||
elfcpp | ||
etc | ||
gas | ||
gdb | ||
gold | ||
gprof | ||
include | ||
intl | ||
ld | ||
libdecnumber | ||
libiberty | ||
opcodes | ||
readline | ||
sim | ||
texinfo | ||
zlib | ||
.cvsignore | ||
.gitattributes | ||
.gitignore | ||
ChangeLog | ||
compile | ||
config-ml.in | ||
config.guess | ||
config.rpath | ||
config.sub | ||
configure | ||
configure.ac | ||
COPYING | ||
COPYING3 | ||
COPYING3.LIB | ||
COPYING.LIB | ||
COPYING.LIBGLOSS | ||
COPYING.NEWLIB | ||
depcomp | ||
djunpack.bat | ||
install-sh | ||
libtool.m4 | ||
lt~obsolete.m4 | ||
ltgcc.m4 | ||
ltmain.sh | ||
ltoptions.m4 | ||
ltsugar.m4 | ||
ltversion.m4 | ||
MAINTAINERS | ||
Makefile.def | ||
Makefile.in | ||
Makefile.tpl | ||
makefile.vms | ||
missing | ||
mkdep | ||
mkinstalldirs | ||
move-if-change | ||
README | ||
README-maintainer-mode | ||
setup.com | ||
src-release.sh | ||
symlink-tree | ||
ylwrap |
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.