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Tom de Vries 1c04f72368 [gdb/symtab] Fix assert in set_length
When running the included test-case, we run into:
...
(gdb) break _start^M
read.h:309: internal-error: set_length: \
  Assertion `m_length == length' failed.^M
...

The problem is that while there are two CUs:
...
$ readelf -wi debug-names-missing-cu | grep @
  Compilation Unit @ offset 0x0:
  Compilation Unit @ offset 0x2d:
...
the CU table in the .debug_names section only contains the first one:
...
CU table:
[  0] 0x0
...

The incomplete CU table makes create_cus_from_debug_names_list set the size of
the CU at 0x0 to the actual size of both CUs combined.

This eventually leads to the assert, when we read the actual size from the CU
header.

While having an incomplete CU table in a .debug_names section is incorrect,
we need a better failure mode than asserting.

The easiest way to fix this is to set the length to 0 (meaning: unkown) in
create_cus_from_debug_names_list.

This makes the failure mode to accept the incomplete CU table, but to ignore
the missing CU.

It would be nice to instead reject the .debug_names index, and build a
complete CU list, but the point where we find this out is well after
dwarf2_initialize_objfile, so it looks rather intrusive to restart at that
point.

Tested on x86_64-linux.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29453
2022-08-30 10:22:28 +02:00
bfd Automatic date update in version.in 2022-08-30 00:00:07 +00:00
binutils Add an option to dlltool to allow the creation of deterministic libraries. 2022-08-23 09:54:52 +01:00
config Add markers for 2.39 branch 2022-07-08 10:41:07 +01:00
contrib Import mklog.py from gcc repo 2020-09-25 10:24:44 -04:00
cpu Add markers for 2.39 branch 2022-07-08 10:41:07 +01:00
elfcpp Add gold support for --package-metadata option. 2022-08-04 17:37:32 -07:00
etc Update year range in copyright notice of binutils files 2022-01-02 12:04:28 +10:30
gas PR29494 Trailing jump table on ARM 2022-08-28 21:05:10 +09:30
gdb [gdb/symtab] Fix assert in set_length 2022-08-30 10:22:28 +02:00
gdbserver Use strwinerror in gdb/windows-nat.c 2022-08-16 08:04:37 -06:00
gdbsupport gdbsupport: fix gdb::optional compilation with C++11 && _GLIBCXX_DEBUG 2022-08-26 11:47:23 -04:00
gnulib gnulib: update to bd11400942d6 2022-05-02 10:54:19 -04:00
gold PR29462, internal error in relocate, at powerpc.cc:10796 2022-08-10 15:31:35 +09:30
gprof Don't use BFD_VMA_FMT in binutils 2022-08-04 12:22:39 +09:30
gprofng gprofng: fix bug 29479 Collection fails when built without java support 2022-08-18 11:15:56 -07:00
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ld PR12265, Compiling ld/ fails on Solaris 8 2022-08-26 18:56:01 +09:30
libbacktrace libtool.m4: fix the NM="/nm/over/here -B/option/with/path" case 2022-03-25 12:02:35 +00:00
libctf libctf: Avoid use of uninitialised variables 2022-08-01 09:30:33 +09:30
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opcodes i386: Add MAX_OPERAND_BUFFER_SIZE 2022-08-16 09:36:58 -07:00
readline gdb/readline: fix extra 'quit' message problem 2022-05-07 10:49:27 +01:00
sim sim/aarch64: Fix aarch64_get_CPSR_bits() declaration 2022-08-25 18:35:59 +02:00
texinfo
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.cvsignore
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ar-lib
ChangeLog Add markers for 2.39 branch 2022-07-08 10:41:07 +01:00
compile
config-ml.in
config.guess Update the config.guess and config.sub files from the master repository and regenerate files. 2022-01-17 16:21:22 +00:00
config.rpath
config.sub Update the config.guess and config.sub files from the master repository and regenerate files. 2022-01-17 16:21:22 +00:00
configure Disable year 2038 support on 32-bit hosts by default 2022-08-10 11:17:53 +01:00
configure.ac Disable year 2038 support on 32-bit hosts by default 2022-08-10 11:17:53 +01:00
COPYING
COPYING3
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COPYING.LIB
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depcomp
djunpack.bat
install-sh
libtool.m4 libtool.m4: fix the NM="/nm/over/here -B/option/with/path" case 2022-03-25 12:02:35 +00:00
lt~obsolete.m4
ltgcc.m4
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ltoptions.m4
ltsugar.m4
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MAINTAINERS MAINTAINERS: Update path to readline config.{sub,guess} files 2021-05-24 18:11:49 +02:00
Makefile.def gprofng: a new GNU profiler 2022-03-11 08:58:31 +00:00
Makefile.in Pass PKG_CONFIG_PATH down from top-level Makefile 2022-04-08 10:56:41 -04:00
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makefile.vms
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README
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symlink-tree
test-driver
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.