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Simon Marchi e3b9454612 Replace objfile field in dwarf2_cu and dwarf2_per_cu_data with dwarf2_per_objfile
The next patch aims to remove the dwarf2_per_objfile global.  In many
functions, we need to find a way to get a reference to the current
dwarf2_per_objfile through the objects passed in parameters.  Often, we have
access to a dwarf2_cu or a dwarf2_per_cu_data.  These objects have a reference
to the objfile, through which we can get the dwarf2_per_objfile:

  dwarf2_per_objfile = ((struct dwarf2_per_objfile *)
		        objfile_data (objfile, dwarf2_objfile_data_key));

However, this is a bit cumbersome to do all over the place.  It would be
more logical if the dwarf2_cu and dwarf2_per_cu_data had a reference to
their dwarf2_per_objfile, which would then have a reference to the
objfile.  It would be more in line with the object hierarchy, where
dwarf2_per_objfile owns the dwarf2_per_cu_data instances.  We could
even remove the reference dwarf2_cu has to dwarf2_per_objfile, since we
can access dwarf2_per_objfile through dwarf2_cu::per_cu.

In a graphical way, references would look like this after the current
patch:

  objfile <--- dwarf2_per_objfile <--- dwarf2_per_cu_data
                                    |      ^
				    |      |
                                    `- dwarf2_cu

This patch has been tested on the buildbot.

gdb/ChangeLog:

	* dwarf2read.c (struct dwarf2_cu) <objfile>: Remove.
	<dwarf2_per_objfile>: New field.
	(struct dwarf2_per_cu_data) <objfile>: Remove.
	<dwarf2_per_objfile>: New field.
	(create_cu_from_index_list): Assign dwarf2_per_objfile instead
	of objfile.
	(create_signatured_type_table_from_index): Likewise.
	(create_debug_type_hash_table): Likewise.
	(fill_in_sig_entry_from_dwo_entry): Likewise.
	(lookup_dwo_unit): Access objfile through dwarf2_per_objfile.
	(create_type_unit_group): Assign dwarf2_per_objfile instead of
	objfile.
	(create_partial_symtab): Access objfile through
	dwarf2_per_objfile.
	(process_psymtab_comp_unit_reader): Likewise.
	(read_comp_units_from_section): Likewise.
	(scan_partial_symbols): Likewise.
	(add_partial_symbol): Likewise.
	(add_partial_subprogram): Likewise.
	(peek_die_abbrev): Likewise.
	(fixup_go_packaging): Likewise.
	(process_full_comp_unit): Likewise.
	(process_full_type_unit): Likewise.
	(process_imported_unit_die): Likewise.
	(dwarf2_compute_name): Likewise.
	(dwarf2_physname): Likewise.
	(read_import_statement): Likewise.
	(create_cus_hash_table): Assign dwarf2_physname instead of
	objfile.
	(read_func_scope): Access objfile through dwarf2_per_objfile.
	(read_lexical_block_scope): Likewise.
	(read_call_site_scope): Likewise.
	(read_variable): Likewise.
	(dwarf2_rnglists_process): Likewise.
	(dwarf2_ranges_process): Likewise.
	(dwarf2_ranges_read): Likewise.
	(dwarf2_record_block_ranges): Likewise.
	(dwarf2_add_field): Likewise.
	(dwarf2_add_member_fn): Likewise.
	(read_structure_type): Likewise.
	(process_structure_scope): Likewise.
	(read_enumeration_type): Likewise.
	(read_array_type): Likewise.
	(read_common_block): Likewise.
	(read_namespace_type): Likewise.
	(read_namespace): Likewise.
	(read_module_type): Likewise.
	(read_tag_pointer_type): Likewise.
	(read_tag_ptr_to_member_type): Likewise.
	(read_tag_string_type): Likewise.
	(read_subroutine_type): Likewise.
	(read_typedef): Likewise.
	(read_base_type): Likewise.
	(attr_to_dynamic_prop): Likewise.
	(read_subrange_type): Likewise.
	(read_unspecified_type): Likewise.
	(load_partial_dies): Likewise.
	(read_partial_die): Likewise.
	(find_partial_die): Likewise.
	(guess_partial_die_structure_name): Likewise.
	(fixup_partial_die): Likewise.
	(read_attribute_value): Likewise.
	(read_addr_index_from_leb128): Likewise.
	(dwarf2_read_addr_index): Likewise.
	(dwarf2_string_attr): Likewise.
	(lnp_state_machine::check_line_address): Likewise.
	(dwarf_decode_lines_1): Likewise.
	(dwarf_decode_lines): Likewise.
	(dwarf2_start_symtab): Likewise.
	(var_decode_location): Likewise.
	(new_symbol_full): Likewise.
	(dwarf2_const_value_data): Likewise.
	(dwarf2_const_value_attr): Likewise.
	(dwarf2_const_value): Likewise.
	(die_type): Likewise.
	(die_containing_type): Likewise.
	(lookup_die_type): Likewise.
	(guess_full_die_structure_name): Likewise.
	(anonymous_struct_prefix): Likewise.
	(dwarf2_name): Likewise.
	(follow_die_ref_or_sig): Likewise.
	(follow_die_offset): Likewise.
	(follow_die_ref): Likewise.
	(dwarf2_fetch_die_loc_sect_off): Likewise.
	(dwarf2_fetch_constant_bytes): Likewise.
	(dwarf2_fetch_die_type_sect_off): Likewise.
	(dwarf2_get_die_type): Likewise.
	(follow_die_sig): Likewise.
	(decode_locdesc): Likewise.
	(dwarf2_per_cu_objfile): Likewise.
	(dwarf2_per_cu_text_offset): Likewise.
	(init_one_comp_unit): Assign dwarf2_per_objfile instead of
	objfile.
	(set_die_type): Access objfile through
	dwarf2_per_objfile.
2018-01-07 11:22:45 -05:00
bfd Automatic date update in version.in 2018-01-07 00:00:33 +00:00
binutils Fix compile time warning introduced by previous delta. 2018-01-03 17:32:59 +00:00
config
cpu
elfcpp Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
etc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
gas RISC-V: Add 2 missing privileged registers. 2018-01-04 14:17:53 -08:00
gdb Replace objfile field in dwarf2_cu and dwarf2_per_cu_data with dwarf2_per_objfile 2018-01-07 11:22:45 -05:00
gold Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
gprof Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
include RISC-V: Add 2 missing privileged registers. 2018-01-04 14:17:53 -08:00
intl
ld RISC-V: Print symbol address for jalr w/ zero offset. 2018-01-05 17:51:23 -08:00
libdecnumber
libiberty
opcodes RISC-V: Print symbol address for jalr w/ zero offset. 2018-01-05 17:51:23 -08:00
readline
sim Fix compile time warning (in the ARM simulator) about a print statement with insufficient arguments. 2018-01-02 17:15:16 +00:00
texinfo
zlib
.cvsignore
.gitattributes
.gitignore
ChangeLog Update the address of the FSF in the copyright notice of files which were using the old address. 2017-12-14 12:48:55 +00:00
compile
config-ml.in
config.guess
config.rpath
config.sub
configure Add gdb for or1k build 2017-12-12 23:39:28 +09:00
configure.ac Add gdb for or1k build 2017-12-12 23:39:28 +09:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS Update the address of the FSF in the copyright notice of files which were using the old address. 2017-12-14 12:48:55 +00:00
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
Makefile.in
Makefile.tpl
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
README
README-maintainer-mode
setup.com
src-release.sh
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.