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Simon Marchi 41bd68f52c Show optimized out local variables in "info locals"
Currently, optimized out variables are not shown when doing "info
locals".  Some users found that confusing, thinking GDB forgot to print
their variable.  This patch adds them to the "info locals" output.  I
added a test in gdb.dwarf2 to test for that behavior.  I think doing a
synthetic DWARF test is the easiest way to have an optimized out local
variable for sure.

However, this change reveals what I think is a bug in GDB, see:

http://lists.dwarfstd.org/pipermail/dwarf-discuss-dwarfstd.org/2017-September/004394.html

This patch marks the tests in inline-locals.exp that start failing as
KFAIL.  I'd like to tackle this bug eventually, but I don't have the
time right now.  I think it's still better to show an extra erroneous
entry than to not show the optimized out variables at all.  I haven't
created a bug in bugzilla yet, but if we agree it's indeed a bug,  I'll
create one and update the setup_kfail lines with the actual bug number
before pushing.

gdb/ChangeLog:

	* stack.c (iterate_over_block_locals): Add LOC_OPTIMIZED_OUT
	case in switch.

gdb/testsuite/ChangeLog:

	* gdb.opt/inline-locals.exp: Mark tests as KFAIL.
	* gdb.dwarf2/info-locals-optimized-out.exp: New file.
	* gdb.dwarf2/info-locals-optimized-out.c: New file.
2017-11-22 15:51:44 -05:00
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gas Riscv ld-elf/stab failure and fake label cleanup. 2017-11-22 11:20:48 -08:00
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		   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.