mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
2ddeaf8a7d
This changes dwarf2read to understand DW_TAG_variant_part and DW_TAG_variant. Note that DW_AT_discr_list is not handled. I did not need this for Rust. I imagine this should not be too hard to add later, should someone need it. Meanwhile I have gdb emit a complaint if it is seen. There is a lurking issue concerning the placement of the discriminant in the DWARF. For Rust, I ended up following the letter of the standard and having the discriminant be a child of the DW_TAG_variant_part. However, GCC's Ada support does not do this. Pierre-Marie filed this with the DWARF committee: http://dwarfstd.org/ShowIssue.php?issue=180123.1 However as that is read-only, if you have comments you might consider adding them to the GCC bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83935 Finally, there is a DWARF extension lurking in here. In Rust, a univariant enum will not have a discriminant. However, in order to unify the representation of all data-carrying enums, I've made LLVM (and my forthcoming rustc patch) emit a univariant enum using a DW_TAG_variant with a single variant part and without DW_AT_discr. The lack of this DW_AT_discr is the extension. I will submit an issue on dwarfstd.org about this. 2018-02-26 Tom Tromey <tom@tromey.com> * dwarf2read.c (struct variant_field): New. (struct nextfield) <variant>: New field. (dwarf2_add_field): Handle DW_TAG_variant_part. (dwarf2_attach_fields_to_type): Attach a discriminant_info to a discriminated union. (read_structure_type): Handle DW_TAG_variant_part. (handle_struct_member_die): New function, extracted from process_structure_scope. Handle DW_TAG_variant. (process_structure_scope): Handle discriminated unions. Call handle_struct_member_die. 2018-02-26 Tom Tromey <tom@tromey.com> * gdb.dwarf2/variant.c: New file. * gdb.dwarf2/variant.exp: New file. |
||
---|---|---|
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.