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Tom Tromey 77c2dba3e8 Avoid crash on single-field union in Rust
PR rust/24976 points out a crash in gdb when a single-field union is
used in Rust.

The immediate problem was a NULL pointer dereference in
quirk_rust_enum.  However, that code is also erroneously treating a
single-field union as if it were a univariant enum.  Looking at the
output of an older Rust compiler, it turns out that univariant enums
are distinguished by having a single *anonymous* field.  This patch
changes quirk_rust_enum to limit its fixup to this case.

Tested with a new-enough version of the Rust compiler to cause the
crash; plus by using an older executable that uses the old univariant
encoding.

gdb/ChangeLog
2019-10-03  Tom Tromey  <tom@tromey.com>

	PR rust/24976:
	* dwarf2read.c (quirk_rust_enum): Handle single-element unions.

gdb/testsuite/ChangeLog
2019-10-03  Tom Tromey  <tom@tromey.com>

	PR rust/24976:
	* gdb.rust/simple.rs (Union2): New type.
	(main): Use Union2.
	* gdb.rust/simple.exp: Add test.
2019-10-03 20:56:22 -06:00
bfd Automatic date update in version.in 2019-10-04 00:00:20 +00:00
binutils binutils: spaces -> tabs in CTF parts of objdump and readelf 2019-10-03 17:04:56 +01:00
config Add markers for 2.33 branch to NEWS and ChangeLog files. 2019-09-09 10:27:40 +01:00
contrib Update dg-extract-results.* from gcc 2018-08-06 16:05:16 +02:00
cpu Add markers for 2.33 branch to NEWS and ChangeLog files. 2019-09-09 10:27:40 +01:00
elfcpp Add markers for 2.33 branch to NEWS and ChangeLog files. 2019-09-09 10:27:40 +01:00
etc Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
gas Arm: Fix out of range conditional branch (PR/24991) 2019-09-24 15:00:41 +01:00
gdb Avoid crash on single-field union in Rust 2019-10-03 20:56:22 -06:00
gnulib Fix Gnulib glob.c resource leaks found by Coverity 2019-08-28 15:19:28 +01:00
gold PR16794, gold ignores R_386_GOTOFF addend 2019-09-28 16:47:52 +09:30
gprof bfd_section_* macros 2019-09-19 09:40:13 +09:30
include libctf: remove ctf_malloc, ctf_free and ctf_strdup 2019-10-03 17:04:56 +01:00
intl Change version to 2.32.51 and regenerate configure and pot files. 2019-01-19 16:51:42 +00:00
ld libctf: installable libctf as a shared library 2019-10-03 17:04:56 +01:00
libctf libctf: fix tabdamage 2019-10-03 17:04:56 +01:00
libdecnumber Merge config/ changes from GCC. 2018-10-31 17:16:41 +00:00
libiberty Synchronize libiberty sources with gcc mainline. 2019-08-09 16:16:18 +01:00
opcodes m68k bfd.h tidy 2019-09-23 10:27:22 +09:30
readline gdb/readline: Fix date in last ChangeLog entry 2019-09-23 22:36:42 +01:00
sim Add testsuite for the PRU simulator port 2019-09-23 22:11:16 +01:00
texinfo
zlib Merge config/ changes from GCC. 2018-10-31 17:16:41 +00:00
.cvsignore
.gitattributes
.gitignore Add archives and make stamps to the .gitignore file. 2016-09-27 15:10:42 +01:00
ar-lib Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
ChangeLog libctf: installable libctf as a shared library 2019-10-03 17:04:56 +01:00
compile
config-ml.in Update top level configure files by synchronizing them with gcc. 2018-01-10 15:29:21 +00:00
config.guess config.guess,config.sub: synchronize with config project master sources 2019-05-23 18:19:56 +02:00
config.rpath
config.sub config.guess,config.sub: synchronize with config project master sources 2019-05-23 18:19:56 +02:00
configure Add --with-static-standard-libraries to the top level 2019-08-19 10:17:11 -06:00
configure.ac Add --with-static-standard-libraries to the top level 2019-08-19 10:17:11 -06:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS Update the address of the FSF in the copyright notice of files which were using the old address. 2017-12-14 12:48:55 +00:00
COPYING.NEWLIB
depcomp
djunpack.bat
install-sh
libtool.m4 Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS Move gnulib to top level 2019-06-14 12:40:02 -06:00
Makefile.def libctf: installable libctf as a shared library 2019-10-03 17:04:56 +01:00
Makefile.in libctf: installable libctf as a shared library 2019-10-03 17:04:56 +01:00
Makefile.tpl Revert "Sync top level files with versions from gcc." 2019-05-30 11:17:19 +01:00
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
multilib.am Merge autoconf / automake update changes from GCC. 2018-10-31 17:10:56 +00:00
README
README-maintainer-mode Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
setup.com
src-release.sh adjust src-release following the renaming of gdb/common/ to gdb/gdbsupport/ 2019-07-13 18:00:32 -07:00
symlink-tree
test-driver Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
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.
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see libg++/README, etc.  That'll give you info about this
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It is now possible to automatically configure and build a variety of
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run the ``configure'' script here, e.g.:

	./configure 
	make

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then do:
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the name as an argument, for instance ``./configure sun4''.  You can
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If you have more than one compiler on your system, it is often best to
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	CC=gcc ./configure
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A similar example using csh:

	setenv CC gcc
	./configure
	make

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