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Mark Wielaard 743649fd80 Use GCC5/DWARF5 DW_AT_noreturn to mark functions that don't return normally.
Add a flag field is_noreturn to struct func_type. Make calling_convention
a small bit field to not increase the size of the struct. Set is_noreturn
if the new GCC5/DWARF5 DW_AT_noreturn is set on a DW_TAG_subprogram.
Use this information to warn the user before doing a finish or return from
a function that does not return normally to its caller.

(gdb) finish
warning: Function endless does not return normally.
Try to finish anyway? (y or n)

(gdb) return
warning: Function does not return normally to caller.
Make endless return now? (y or n)

gdb/ChangeLog

	* dwarf2read.c (read_subroutine_type): Set TYPE_NO_RETURN from
	DW_AT_noreturn.
	* gdbtypes.h (struct func_type): Add is_noreturn field flag. Make
	calling_convention an 8 bit bit field.
	(TYPE_NO_RETURN): New macro.
	* infcmd.c (finish_command): Query if function does not return
	normally.
	* stack.c (return_command): Likewise.

gdb/testsuite/ChangeLog

	* gdb.base/noreturn-return.c: New file.
	* gdb.base/noreturn-return.exp: New file.
	* gdb.base/noreturn-finish.c: New file.
	* gdb.base/noreturn-finish.exp: New file.

include/ChangeLog

	* dwarf2.def (DW_AT_noreturn): New DWARF5 attribute.

The dwarf2.h addition and the code to emit the new attribute is already in
the gcc tree.
2015-01-23 17:29:19 +01:00
bfd Automatic date update in version.in 2015-01-23 00:00:12 +00:00
binutils Fix memory access violations triggered by running strip on fuzzed binaries. 2015-01-21 17:37:23 +00:00
config
cpu
elfcpp
etc
gas Extend .reloc to accept some BFD_RELOCs 2015-01-19 19:37:46 +10:30
gdb Use GCC5/DWARF5 DW_AT_noreturn to mark functions that don't return normally. 2015-01-23 17:29:19 +01:00
gold [GOLD] Correct powerpc64 ifunc plt entry test 2015-01-22 15:42:45 +10:30
gprof
include Use GCC5/DWARF5 DW_AT_noreturn to mark functions that don't return normally. 2015-01-23 17:29:19 +01:00
intl
ld ld: Update expected test results for 32-bit hosts. 2015-01-20 16:03:32 +00:00
libdecnumber Another part of fixing "make TAGS". 2015-01-22 21:07:31 +02:00
libiberty strerror.c: Do not declare sys_nerr or sys_errlist if already macros 2015-01-19 16:29:07 +01:00
opcodes S/390: Add support for IBM z13. 2015-01-16 12:28:58 +01:00
readline
sim Build failure in sim/rx/gdb-if.c on windows 2015-01-15 07:21:50 +04:00
texinfo
.cvsignore
.gitattributes
.gitignore
ChangeLog Don't disable gprof for moxie 2015-01-14 19:10:48 -05:00
compile
config-ml.in
config.guess
config.rpath
config.sub
configure Don't disable gprof for moxie 2015-01-14 19:10:48 -05:00
configure.ac Don't disable gprof for moxie 2015-01-14 19:10:48 -05:00
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
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Makefile.tpl
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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.