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The DW_AT_data_bit_offset attribute was introduced by DWARF V4 and allows specifying the offset of a data member within its containing entity. But although the new attribute was intended to replace DW_AT_bit_offset for this purpose, GDB ignores it, and thus GCC still emits DW_AT_bit_offset instead. See also https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71669. This change fixes GDB's lack of support for DW_AT_data_bit_offset and adds an appropriate test case. gdb/ChangeLog: PR gdb/12616 * dwarf2read.c (dwarf2_add_field): Handle the DWARF V4 attribute DW_AT_data_bit_offset. gdb/testsuite/ChangeLog: PR gdb/12616 * gdb.dwarf2/nonvar-access.exp: New testcase. Check that GDB respects the DW_AT_data_bit_offset attribute.
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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.
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