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Joel Brobecker 403cb6b138 GDB/MI: Add new "--language LANG" command option.
Frontend sometimes need to evaluate expressions that are
language-specific. For instance, Eclipse uses the following
expression to determine the size of an address on the target:

    -data-evaluate-expression "sizeof (void*)"

Unfortunately, if the main of the program being debugged is not C,
this may not work. For instance, if the main is in Ada, you get...

    -data-evaluate-expression "sizeof (void*)"
    ^error,msg="No definition of \"sizeof\" in current context."

... and apparently decides to stop the debugging session as a result.
The  recommendation sent was to specifically set the language to C
before trying to evaluate the expression.  Something such as:

    1. save current language
    2. set language c
    3. -data-evaluate-expression "sizeof (void*)"
    4. Restore language

This has the same disadvantages as the ones outlined in the "Context
Management" section of the GDB/MI documentation regarding setting
the current thread or the current frame, thus recommending the use of
general command-line switches such as --frame, or --thread instead.

This patch follows the same steps for the language, adding a similar
new command option: --language LANG. Example of use:

    -data-evaluate-expression --language c "sizeof (void*)"
    ^done,value="4"

gdb/ChangeLog:

        * mi/mi-parse.h (struct mi_parse) <language>: New field.
        * mi/mi-main.c (mi_cmd_execute): Temporarily set language to
        PARSE->LANGUAGE during command execution, if set.
        * mi/mi-parse.c: Add "language.h" #include.
        (mi_parse): Add parsing of "--language" command option.

        * NEWS: Add entry mentioning the new "--language" command option.

gdb/testsuite/ChangeLog:

        * gdb.mi/mi-language.exp: New file.

gdb/doc/ChangeLog:

        * gdb.texinfo (Show): Add xref anchor for "show language" command.
        (Context management): Place current subsection text into its own
        subsubsection.  Add new subsubsection describing the "--language"
        command option.
2013-11-14 14:36:18 +04:00
bfd daily update 2013-11-14 09:30:19 +10:30
binutils * rescoff.c (write_coff_file): Use 64-bit alignment for resource 2013-11-13 12:54:29 +00:00
config 2013-10-16 Jan-Benedict Glaw <jbglaw@lug-owl.de> 2013-10-16 20:45:20 +00:00
cpu PR binutils/15241 2013-03-08 17:25:12 +00:00
elfcpp PowerPC64 ELFv2 support for gold. 2013-10-30 13:45:05 +10:30
etc
gas Fix ChangeLog entries from earlier commit. 2013-11-11 15:34:48 -08:00
gdb GDB/MI: Add new "--language LANG" command option. 2013-11-14 14:36:18 +04:00
gold Fix assert failure with --emit-relocs and .eh_frame sections. 2013-11-06 10:37:45 -08:00
gprof ChangeLog fix. 2013-11-02 17:12:59 +10:30
include bfd/ 2013-11-13 14:47:04 +00:00
intl
ld ld/ARM: Fix script-type testsuite failure. 2013-11-14 08:39:59 +00:00
libdecnumber merge from gcc 2013-10-16 00:29:48 +00:00
libiberty 2013-10-29 Marc Glisse <marc.glisse@inria.fr> 2013-11-08 11:11:41 -07:00
opcodes Fix ChangeLog entries from earlier commit. 2013-11-11 15:34:48 -08:00
readline * readline.c (bind_arrow_keys_internal): 2013-09-24 14:49:48 +00:00
sim sim/ChangeLog: Correct bug number in previous commit. 2013-11-07 16:14:51 +00:00
texinfo
.cvsignore
.gitignore Sync the root .gitignore file with GCC's. 2013-01-11 15:17:35 +00:00
ChangeLog Fix ChangeLog entries from earlier commit. 2013-11-11 15:34:48 -08:00
compile
config-ml.in
config.guess * config.guess: Update from config repo. 2013-04-29 15:13:53 +00:00
config.rpath
config.sub * config.guess: Update from config repo. 2013-04-29 15:13:53 +00:00
configure Disable libcilkrts when C++ is not used. 2013-11-08 11:11:42 -07:00
configure.ac Disable libcilkrts when C++ is not used. 2013-11-08 11:11:42 -07:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS 2013-01-07 Jeff Johnston <jjohnstn@redhat.com> 2013-01-07 21:39:26 +00:00
COPYING.NEWLIB 2013-10-01 Jeff Johnston <jjohnstn@redhat.com> 2013-10-01 18:14:04 +00:00
depcomp
djunpack.bat
install-sh
libtool.m4 * libtool.m4 (_LT_ENABLE_LOCK <ld -m flags>): Remove non-canonical 2013-09-20 09:51:25 +00:00
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS MAINTAINERS: clarify policy with config/ (and other top level files) 2012-05-12 03:10:17 +00:00
Makefile.def Added Cilk runtime library (libcilkrts) into GCC. 2013-11-08 11:11:41 -07:00
Makefile.in * Makefile.in: Regenerate. 2013-11-08 11:11:42 -07:00
Makefile.tpl * Makefile.tpl: Fix typo. * Makefile.in: Regenerate. 2013-11-08 11:11:42 -07:00
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
README
README-maintainer-mode
setup.com
src-release * src-release (do-proto-toplevel): Support subdir-path-prefixed 2013-10-15 20:45:52 +00:00
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.