This adds a new "command" style that is used when styling the name of
a gdb command.
Note that not every instance of a command name that is output by gdb
is changed here. There is currently no way to style error() strings,
and there is no way to mark up command help strings.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31747
Reviewed-By: Eli Zaretskii <eliz@gnu.org>
Reviewed-By: Keith Seitz <keiths@redhat.com>
Approved-By: Andrew Burgess <aburgess@redhat.com>
When compiling dw2-multiple-debug-info.c using -gdwarf-5
-fdebug-types-section, we end with two .debug_info sections in the object
file:
...
$ g++ gdb.dwarf2/dw2-multiple-debug-info.c -c -g \
-gdwarf-5 \
-fdebug-types-section
$ readelf -WS dw2-multiple-debug-info.o | grep -v RELA | grep .debug_info
[10] .debug_info PROGBITS 0 000128 0000cd 00 GC 0 0 8
[12] .debug_info PROGBITS 0 0001f8 0000ad 00 C 0 0 8
...
One of them contains the CU for dw2-multiple-debug-info.c, the other contains
the TU for the type of variable a.
When trying to print the type of variable a, we get:
...
$ gdb -q -batch dw2-multiple-debug-info.o -ex "ptype a"
'a' has unknown type; cast it to its declared type
...
because the TU hasn't been read.
Fix this by adding support for reading multiple .debug_info sections, similar
to how that is done for multiple .debug_types sections, getting us instead:
...
$ gdb -q -batch dw2-multiple-debug-info.o -ex "ptype a"
type = class sp1::A {
...
}
...
Tested on x86_64-linux.
PR symtab/32223
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=32223
I noticed when running test-case gdb.ada/info_exc.exp with glibc debug info
installed, that the "info exceptions" command that lists all Ada exceptions
also expands non-Ada CUs, which includes CUs in
/lib64/ld-linux-x86-64.so.2 and /lib64/libc.so.6.
Fix this by:
- adding a new lang_matcher parameter to the expand_symtabs_matching
function, and
- using that new parameter in the expand_symtabs_matching call in
ada_add_global_exceptions.
The new parameter is a hint, meaning implementations are free to ignore it and
expand CUs with any language. This is the case for partial symtabs, I'm not
sure whether it makes sense to implement support for this there.
Conversely, when processing a CU with language C and name "<artificial>"
(as produced by GCC LTO), the CU may not really have a single language and we
should ignore the lang_matcher. See also commit d2f6771173
("Fix 'catch exception' with -flto").
Now that we have lang_matcher available, also use it to limit name splitting
styles and symbol matchers to those applicable to the matched languages.
Without this patch we have (with a gdb build with -O0):
...
$ time gdb -q -batch -x outputs/gdb.ada/info_exc/gdb.in.1 > /dev/null
real 0m1.866s
user 0m2.089s
sys 0m0.120s
...
and with this patch we have:
...
$ time gdb -q -batch -x outputs/gdb.ada/info_exc/gdb.in.1 > /dev/null
real 0m0.469s
user 0m0.777s
sys 0m0.051s
...
Or, to put it in terms of number of CUs, we have 1853 CUs:
...
$ gdb -q -batch -readnow outputs/gdb.ada/info_exc/foo \
-ex start \
-ex "maint info symtabs" \
| grep -c " name "
1853
...
Without this patch, we have:
...
$ gdb -q -batch outputs/gdb.ada/info_exc/foo \
-ex start \
-ex "info exceptions" \
-ex "maint info symtabs" \
| grep -c " name "
1393
...
so ~75% of the CUs is expanded, and with this patch we have:
...
$ gdb <same-as-above>
20
...
so ~1% of the CUs is expanded.
Tested on x86_64-linux.
Approved-By: Tom Tromey <tom@tromey.com>
PR symtab/32182
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=32182
dwarf2_per_bfd::index_addrmap is only used by the .gdb_index reader,
so this field can be moved to mapped_gdb_index instead. Then,
cooked_index_functions::find_per_cu can be removed in favor of a
method on the index object.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31821
Approved-By: Simon Marchi <simon.marchi@efficios.com>
dwarf2_per_objfile::adjust applies gdbarch_adjust_dwarf2_addr to an
address, leaving the result unrelocated. However, this adjustment is
only needed for text-section symbols -- it isn't needed for any sort
of address mapping. Therefore, these calls can be removed from
read_addrmap_from_aranges and create_addrmap_from_gdb_index.
Approved-By: Andrew Burgess <aburgess@redhat.com>
Move some declarations related to the "quit" machinery from defs.h to
event-top.h. Most of the definitions associated to these declarations
are in event-top.c. The exceptions are `quit()` and `maybe_quit()`,
that are defined in utils.c. For consistency, move these two
definitions to event-top.c.
Include "event-top.h" in many files that use these things.
Change-Id: I6594f6df9047a9a480e7b9934275d186afb14378
Approved-By: Tom Tromey <tom@tromey.com>
Now that defs.h, server.h and common-defs.h are included via the
`-include` option, it is no longer necessary for source files to include
them. Remove all the inclusions of these files I could find. Update
the generation scripts where relevant.
Change-Id: Ia026cff269c1b7ae7386dd3619bc9bb6a5332837
Approved-By: Pedro Alves <pedro@palves.net>
This patch changes the DWARF reader to use the new symbol domains. It
also adjusts many bits of associated code to adapt to this change.
The non-DWARF readers are updated on a best-effort basis. This is
somewhat simpler since most of them only support C and C++. I have no
way to test a few of these.
I went back and forth a few times on how to handle the "tag"
situation. The basic problem is that C has a special namespace for
tags, which is separate from the type namespace. Other languages
don't do this. So, the question is, should a DW_TAG_structure_type
end up in the tag domain, or the type domain, or should it be
language-dependent?
I settled on making it language-dependent using a thought experiment.
Suppose there was a Rust compiler that only emitted nameless
DW_TAG_structure_type objects, and specified all structure type names
using DW_TAG_typedef. This DWARF would be correct, in that it
faithfully represents the source language -- but would not work with a
purely struct-domain implementation in gdb. Therefore gdb would be
wrong.
Now, this approach is a little tricky for C++, which uses tags but
also enters a typedef for them. I notice that some other readers --
like stabsread -- actually emit a typedef symbol as well. And, I
think this is a reasonable approach. It uses more memory, but it
makes the internals simpler. However, DWARF never did this for
whatever reason, and so in the interest of keeping the series slightly
shorter, I've left some C++-specific hacks in place here.
Note that this patch includes language_minimal as a language that uses
tags. I did this to avoid regressing gdb.dwarf2/debug-names-tu.exp,
which doesn't specify the language for a type unit. Arguably this
test case is wrong.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30164
This changes quick_symbol_functions::lookup_global_symbol_language to
accept domain_search_flags rather than just a domain_enum, and fixes
up the fallout.
To avoid introducing any regressions, any code passing VAR_DOMAIN now
uses SEARCH_VFT.
That is, no visible changes should result from this patch. However,
it sets the stage to refine some searches later on.
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
Since GDB now requires C++17, we don't need the internally maintained
gdb::optional implementation. This patch does the following replacing:
- gdb::optional -> std::optional
- gdb::in_place -> std::in_place
- #include "gdbsupport/gdb_optional.h" -> #include <optional>
This change has mostly been done automatically. One exception is
gdbsupport/thread-pool.* which did not use the gdb:: prefix as it
already lives in the gdb namespace.
Change-Id: I19a92fa03e89637bab136c72e34fd351524f65e9
Approved-By: Tom Tromey <tom@tromey.com>
Approved-By: Pedro Alves <pedro@palves.net>
gdb::make_unique is a wrapper around std::make_unique when compiled with
C++17. Now that C++17 is required, use std::make_unique directly in the
codebase, and remove gdb::make_unique.
Change-Id: I80b615e46e4b7c097f09d78e579a9bdce00254ab
Approved-By: Tom Tromey <tom@tromey.com>
Approved-By: Pedro Alves <pedro@palves.net
I noticed a few more style issues in commit 8b9c08edda ("[gdb/symtab] Add
name_of_main and language_of_main to the DWARF index"), after checking it
with gcc's check_GNU_style.{sh,py}.
Fix these.
Build on x86_64-linux.
Post-commit review pointed out a few style issues in commit 8b9c08edda
("[gdb/symtab] Add name_of_main and language_of_main to the DWARF index").
Fix these.
Tested on x86_64-linux.
Reported-By: Tom Tromey <tom@tromey.com>
Approved-By: Tom Tromey <tom@tromey.com>
This patch adds a new section to the DWARF index containing the name
and the language of the main function symbol, gathered from
`cooked_index::get_main`, if available. Currently, for lack of a better name,
this section is called the "shortcut table". The way this name is both saved and
applied upon an index being loaded in mirrors how it is done in
`cooked_index_functions`, more specifically, the full name of the main function
symbol is saved and `set_objfile_main_name` is used to apply it after it is
loaded.
The main use case for this patch is in improving startup times when dealing with
large binaries. Currently, when an index is used, GDB has to expand symtabs
until it finds out what the language of the main function symbol is. For some
large executables, this may take a considerable amount of time to complete,
slowing down startup. This patch bypasses that operation by having both the name
and language of the main function symbol be provided ahead of time by the index.
In my testing (a binary with about 1.8GB worth of DWARF data) this change brings
startup time down from about 34 seconds to about 1.5 seconds.
When testing the patch with target board cc-with-gdb-index, test-case
gdb.fortran/nested-funcs-2.exp starts failing, but this is due to a
pre-existing issue, filed as PR symtab/30946.
Tested on x86_64-linux, with target board unix and cc-with-gdb-index.
PR symtab/24549
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=24549
Approved-By: Tom de Vries <tdevries@suse.de>
While GDB is still C++11, lets add a gdb::make_unique template
function that can be used to create std::unique_ptr objects, just like
the C++14 std::make_unique.
If GDB is being compiled with a C++14 compiler then the new
gdb::make_unique function will delegate to the std::make_unique. I
checked with gcc, and at -O1 and above gdb::make_unique will be
optimised away completely in this case.
If C++14 (or later) becomes our minimum, then it will be easy enough
to go through the code and replace gdb::make_unique with
std::make_unique later on.
I've make use of this function in all the places I think this can
easily be used, though I'm sure I've probably missed some.
Should be no user visible changes after this commit.
Approved-By: Tom Tromey <tom@tromey.com>
Move everything related to reading .gdb_index from read.c to
read-gdb-index.c. The only entry point exposed by read-gdb-index.{c,h}
is dwarf2_read_gdb_index.
Change-Id: I1e32c8f0720086538de8d2f612f27545377099bc
Approved-By: Tom Tromey <tom@tromey.com>
