This commit aims to give a cleaner mechanism by which the user can
prevent GDB from trying to load any previous command history.
Currently the user can change the path to the history file, either
using a command line flag, or by setting the GDBHISTFILE environment
variable, and if the path is set to a non-existent file, then
obviously GDB wont load any command history. However, this feels like
a bit of a bodge, I'd like to add an official mechanism by which we
can disable command history loading.
Why would we want to prevent command history loading? The specific
use case I have is GDB starting with a CWD that is a network mounted
directory, and there is no command history present. Still GDB will
access the network in order to check for the file. In my particular
use case I'm actually starting a large number of GDB instances in
parallel, all in the same network mounted directory, the large number
of network accesses looking for this file introduces a noticeable
delay at GDB startup.
The approach I'm proposing here is a slight adjustment to the current
rules for setting up the history filename. Currently, if a user does
this, they see an error:
(gdb) set history filename
Argument required (filename to set it to.).
However, if a user does this:
$ GDBHISTFILE= gdb --quiet
(gdb) set history save on
(gdb) q
warning: Could not rename -gdb18416~ to : No such file or directory
So, we already have a bug in this area. My plan is to allow the empty
filename to be accepted, and for this to mean, neither load, nor save
the command history.
This does mean that we now have two mechanisms to prevent saving the
command history:
(gdb) set history filename
or
(gdb) set history save off
But the only way to prevent loading the command history is to set the
filename to the empty string _before_ you get to a GDB prompt, either
using a command line option, or the environment variable.
I've updated some of the show commands, for example this session:
(gdb) set history filename
(gdb) show history filename
There is no filename currently set for recording the command history in.
(gdb) show history save
Saving of the history record on exit is off.
(gdb) set history save on
(gdb) show history save
Saving of the history is disabled due to the value of 'history filename'.
(gdb) set history filename /tmp/hist
(gdb) show history save
Saving of the history record on exit is on.
I've updated the manual, and added some tests.
gdb/ChangeLog:
* NEWS: Mention new behaviour of the history filename.
* top.c (write_history_p): Add comment.
(show_write_history_p): Add header comment, give a different
message when history writing is on, but the history filename is
empty.
(history_filename): Add comment.
(history_filename_empty): New function.
(show_history_filename): Add header comment, give a different
message when the filename is empty.
(init_history): Compare history_filename against nullptr, and only
read history if the filename is not empty.
(set_history_filename): Add header comment, and only make
non-empty filenames absolute.
(init_main): Make the filename argument to 'set history filename'
optional.
gdb/doc/ChangeLog:
* gdb.texinfo (Command History): Extend description for
GDBHISTFILE and GDBHISTSIZE, add detail about the filename for
'set history filename' being optional. Describe the effect of an
empty history filename on 'set history save on'.
gdb/testsuite/ChangeLog:
* gdb.base/default.exp: Remove test of 'set history filename'.
* gdb.base/gdbinit-history.exp: Add tests for setting the history
filename to the empty string.
* lib/gdb.exp (gdb_init): Unset environment variables GDBHISTFILE
and GDBHISTSIZE.
Change-Id: Ia586e4311182fac99113b60f11ef8a11fbd5450b
The floating point register interface has changed to this:
https://github.com/NetBSD/src/blob/trunk/sys/arch/arm/include/reg.h
It now uses VFP instead of FPA registers. This patch updates
arm-nbsd-nat.c accordingly.
Also implements read_description so that these registers are correctly
printed by "info registers" et al.
Tested by compiling & running on arm-netbsd on qemu.
gdb/ChangeLog:
2020-03-02 Christian Biesinger <cbiesinger@google.com>
* arm-nbsd-nat.c (arm_supply_fparegset): Rename to...
(arm_supply_vfpregset): ...this, and update to use VFP registers.
(fetch_fp_register): Update.
(fetch_fp_regs): Update.
(store_fp_register): Update.
(store_fp_regs): Update.
(arm_netbsd_nat_target::read_description): New function.
(fetch_elfcore_registers): Update.
With this commit:
commit 5b6d1e4fa4
Date: Fri Jan 10 20:06:08 2020 +0000
Multi-target support
There was a regression in GDB's support for older aspects of the
remote protocol. Specifically, when a target sends the 'S' stop reply
packet (which doesn't include a thread-id) then GDB has to figure out
which thread actually stopped.
Before the above commit GDB figured this out by using inferior_ptid in
process_stop_reply, which contained the ptid of the current
process/thread. This would be fine for single threaded
targets (which is the only place using an S packet makes sense), but
in the general case, relying on inferior_ptid for processing a stop is
wrong - there's no reason to believe that what was GDB's current
thread will be the same thread that just stopped in the target.
With the above commit the inferior_ptid now has the value null_ptid
inside process_stop_reply, this can be seen in do_target_wait, where
we call switch_to_inferior_no_thread before calling do_target_wait_1.
The problem this causes can be seen in the new test that runs
gdbserver using the flag --disable-packet=T, and causes GDB to throw
this assertion:
inferior.c:279: internal-error: inferior* find_inferior_pid(process_stratum_target*, int): Assertion `pid != 0' failed.
A similar problem was fixed in this commit:
commit 3cada74087
Date: Thu Jan 11 00:23:04 2018 +0000
Fix backwards compatibility with old GDBservers (PR remote/22597)
However, this commit deals with the case where the T packet doesn't
include a thread-id, not the S packet case. This commit solves the
problem providing a thread-id at the GDB side if the remote target
doesn't provide one. The thread-id provided comes from
remote_state::general_thread, however, though this does work, I don't
think it is the ideal solution.
The remote_state tracks two threads, the continue_thread and the
general_thread, these are updated when GDB asks the remote target to
switch threads. The general_thread is set before performing things
like register or memory accesses, and the continue_thread is set
before things like continue or step commands. Further, the
general_thread is updated after a target stops to reference the thread
that stopped.
The first thing to note from the above description is that we have a
cycle of dependency, when a T packet arrives without a thread-id we
fill in the thread-id from the general_thread data. The thread-id
from the stop event is then used to set the general_thread. This in
itself feels a little weird.
The second question is why use the general_thread at all? You'd think
given how they are originally set that the continue thread would be a
better choice. The problem with this is that the continue_thread, if
the user just does "continue", will be set to the minus_one_ptid, in
the remote protocol this means all threads. When the stop arrives
with no thread-id and we use continue_thread we end up with a very
similar assertion to before because we now end up trying to lookup a
thread using the minus_one_ptid. By contrast, once GDB has connected
to a remote target the general_thread will be set to a valid
thread-id, after which, if the target is single threaded, and stop
events arrive without a thread-id, everything works fine.
There is one slight weirdness with the above behaviour though. When
GDB first connects to the remote target inferior_ptid is null_ptid,
however, upon connecting we query the remote for its threads. As the
thread information arrives GDB adds the threads to its internal
database, and this process involves setting inferior_ptid to the id of
each new thread in turn. Once we know about all the threads we wait
for a stop event from the remote target to indicate that GDB is now in
control of the target.
The problem is that after adding the new threads we don't reset
inferior_ptid, and the code path we use to wait for a stop event from
the target also doesn't reset inferior_ptid, so it turns out that
during the initial connection inferior_ptid is not null_ptid. This is
lucky, because during the initial connection the general_thread
variable _is_ set to null_ptid.
So, during the initial connection, if the first stop event is missing
a thread-id then we "provide" a thead-id from general_thread. This
turns out to be null_ptid meaning no thread-id is known, and then
during process_stop_reply we fill in the missing thread-id using
inferior_ptid.
This was all discussed on the mailing list here:
https://sourceware.org/ml/gdb-patches/2020-02/msg01011.html
My proposal for a fix then is:
1. Move the call to switch_to_inferior_no_thread into
do_target_wait_1, this means that in all cases where we are waiting
for an inferior the inferior_ptid will be set to null_ptid. This is
good as no wait code should rely on inferior_ptid.
2. Remove the use of general_thread from the 'T' packet processing.
The general_thread read here was only ever correct by chance, and we
shouldn't be using it this way.
3. Remove use of inferior_ptid from process_stop_event as this is
wrong, and will always be null_ptid now anyway.
4. When a stop_event has null_ptid due to a lack of thread-id (either
from a T packet or an S packet) then pick the first non exited thread
in the target and use that. This will be fine for single threaded
targets. A multi-thread or multi-inferior aware remote target
should be using T packets with a thread-id, so we give a warning if
the target is multi-threaded, and we are still missing a thread-id.
5. Extend the existing test that covered the T packet with missing
thread-id to also cover the S packet.
gdb/ChangeLog:
* remote.c (remote_target::remote_parse_stop_reply): Don't use the
general_thread if the stop reply is missing a thread-id.
(remote_target::process_stop_reply): Use the first non-exited
thread if the target didn't pass a thread-id.
* infrun.c (do_target_wait): Move call to
switch_to_inferior_no_thread to ....
(do_target_wait_1): ... here.
gdb/testsuite/ChangeLog:
* gdb.server/stop-reply-no-thread.exp: Add test where T packet is
disabled.
* defs.h includes config.h
* config.h may define _GNU_SOURCE
* if _GNU_SOURCE is defined, that must be before including any system
header (see feature_test_macro(7))
This is necessary to ensure that a prototype for mkostemp() is brought
into scope by <stdlib.h> when compiling filestuff.h, on platforms where
_GNU_SOURCE isn't unconditionally defined for C++.
In file included from ../../gdb/../gdbsupport/scoped_fd.h:24,
from ../../gdb/debuginfod-support.c:22:
../../gdb/../gdbsupport/filestuff.h: In function ‘int gdb_mkostemp_cloexec(char*, int)’:
../../gdb/../gdbsupport/filestuff.h:59:10: error: ‘mkostemp’ was not declared in this scope; did you mean ‘mkstemp’?
gdb/ChangeLog:
2020-02-29 Jon Turney <jon.turney@dronecode.org.uk>
* debuginfod-support.c: Include defs.h first.
When language is set to auto, part of loading an executable is to update the
language accordingly. This is implemented by set_initial_language.
In case of a c++ executable without DW_AT_main_subprogram,
set_initial_language finds "main" in the minimal symbols, and does a lookup of
"main" in the symbol tables to determine the language of the symbol, and uses
that as initial language.
The symbol lookup is done using lookup_symbol which is a wrapper around
lookup_symbol_in_language, using the current language.
So, consider two c++ executables a.out and b.out, which we'll load one after
another. If we track the resulting lookup_symbol_in_language calls:
...
$ gdb -batch \
-ex "b lookup_symbol_in_language" \
-ex r -ex c -ex c \
--args gdb
...
we find that indeed lookup_symbol_in_language is called once using language_c, and
once using language_c_plus:
...
(gdb) file a.out
Reading symbols from a.out...
Breakpoint 1, lookup_symbol_in_language (name=0x5555568c2050 "main", \
block=0x0, domain=VAR_DOMAIN, lang=language_c, is_a_field_of_this=0x0) \
at ../../gdb/symtab.c:1905
1905 {
(gdb) file b.out
Load new symbol table from "b.out"? (y or n) y
Reading symbols from b.out...
Breakpoint 1, lookup_symbol_in_language (name=0x5555568c2030 "main", \
block=0x0, domain=VAR_DOMAIN, lang=language_cplus, is_a_field_of_this=0x0) \
at ../../gdb/symtab.c:1905
1905 {
(gdb)
...
It seems like a bad idea to have the previous language play a role
in determining the executable language.
Fix this by using lookup_symbol_in_language in set_initial_language with the
default language c as argument.
Tested on x86_64-linux.
gdb/ChangeLog:
2020-02-28 Tom de Vries <tdevries@suse.de>
* symfile.c (set_initial_language): Use default language for lookup.
Running anything with the fission.exp board fails since commit
c0ab21c22b ("Replace init_cutu_and_read_dies with a class").
GDB crashes while reading the DWARF info. cu is NULL in
read_signatured_type:
Thread 1 "gdb" received signal SIGSEGV, Segmentation fault.
0x000055555780663e in read_signatured_type
sig_type=0x6210000c3600) at /home/simark/src/binutils-gdb/gdb/dwarf2/read.c:22782
22782 gdb_assert (cu->die_hash == NULL);
(top-gdb) bt
#0 0x000055555780663e in read_signatured_type (sig_type=0x6210000c3600) at /home/simark/src/binutils-gdb/gdb/dwarf2/read.c:22782
#1 0x00005555578062dd in load_full_type_unit (per_cu=0x6210000c3600) at /home/simark/src/binutils-gdb/gdb/dwarf2/read.c:22758
#2 0x00005555577c5fb7 in queue_and_load_dwo_tu (slot=0x60600007fc00, info=0x6210000c34e0) at /home/simark/src/binutils-gdb/gdb/dwarf2/read.c:12674
#3 0x0000555559934232 in htab_traverse_noresize (htab=0x60b000063670, callback=0x5555577c5e61 <queue_and_load_dwo_tu(void**, void*)>, info=0x6210000c34e0)
at /home/simark/src/binutils-gdb/libiberty/hashtab.c:775
#4 0x00005555577c6252 in queue_and_load_all_dwo_tus (per_cu=0x6210000c34e0) at /home/simark/src/binutils-gdb/gdb/dwarf2/read.c:12701
#5 0x000055555777ebd8 in dw2_do_instantiate_symtab (per_cu=0x6210000c34e0, skip_partial=false) at /home/simark/src/binutils-gdb/gdb/dwarf2/read.c:2371
#6 0x000055555777eea2 in dw2_instantiate_symtab (per_cu=0x6210000c34e0, skip_partial=false) at /home/simark/src/binutils-gdb/gdb/dwarf2/read.c:2395
#7 0x0000555557786ab6 in dw2_lookup_symbol (objfile=0x614000007240, block_index=GLOBAL_BLOCK, name=0x602000025310 "main", domain=VAR_DOMAIN)
at /home/simark/src/binutils-gdb/gdb/dwarf2/read.c:3539
After creating the reader object, the reader.cu field should not be
NULL. By checking the commit previous to the faulty one mentioned
above, I noticed that the cu field is normally set by
init_cu_die_reader, called from read_cutu_die_from_dwo, itself called
from cutu_reader::init_tu_and_read_dwo_dies, itself called from
cutu_reader's constructor.
However, cutu_reader::init_tu_and_read_dwo_dies calls
read_cutu_die_from_dwo, passing a pointer to a local `die_reader_specs`
variable. So it's the `cu` field of that object that gets set.
cutu_reader itself is a `die_reader_specs` (it inherits from it), and
the intention was most likely to pass `this` to read_cutu_die_from_dwo.
This way, the fields of the cutu_reader object, which
read_signatured_type will use, are set.
With this, I am able to use:
make check RUNTESTFLAGS='--target_board=fission'
and it looks much better. There are still some failures to be
investigated, but that's the usual state of the testsuite.
gdb/ChangeLog:
* dwarf2/read.c (cutu_reader::init_tu_and_read_dwo_dies): Remove
reader variable, pass `this` to read_cutu_die_from_dwo.
This fixes a regression caused by commit 0d79cdc494d5:
$ make check TESTS="gdb.dwarf2/dw2-ranges-base.exp"
[...]
ERROR: GDB process no longer exists
This error is caused by an abort during the computation of srcpath
when SYMTAB_DIRNAME (s) == NULL.
Computing srcpath only when SYMTAB_DIRNAME (s) is not NULL fixes this
error. Also change the condition for calling debuginfod_source_query
to include whether srcpath could be computed.
gdb/ChangeLog:
2020-02-27 Aaron Merey <amerey@redhat.com>
* source.c (open_source_file): Check for nullptr when computing
srcpath.
I noticed that there's no real reason to have field_info::nfields in
the DWARF reader. It simply mirrors information that is already
available. This patch removes it, in favor of a convenience method.
gdb/ChangeLog
2020-02-27 Tom Tromey <tromey@adacore.com>
* dwarf2/read.c (struct field_info) <nfields>: Now a method, not a
member.
(dwarf2_add_field): Don't update nfields.
(dwarf2_attach_fields_to_type, process_structure_scope): Update.
Use std::abs so that we get the C++ overloaded version that matches
the argument type instead of the C abs function which is only for int
arguments.
There should be no user visible change after this commit.
gdb/ChangeLog:
* gdbtypes.c (create_array_type_with_stride): Use std::abs not
abs.
Include files are represented by a partial symtab, but don't expand to
anything. From dwarf2_psymtab::expand_psymtab:
if (per_cu == NULL)
{
/* It's an include file, no symbols to read for it.
Everything is in the parent symtab. */
readin = true;
return;
}
This patch introduces a new specialization of partial_symtab to handle
this case. In addition to being slightly smaller, I believe an
include file is the only situation where a DWARF psymtab can result in
a null compunit_symtab. This adds an assert to that effect as well.
This change will simplify one of the psymtab sharing patches.
gdb/ChangeLog
2020-02-26 Tom Tromey <tom@tromey.com>
* dwarf2/read.c (struct dwarf2_include_psymtab): New.
(dwarf2_create_include_psymtab): Use dwarf2_include_psymtab.
(dwarf2_psymtab::expand_psymtab, dwarf2_psymtab::readin_p)
(dwarf2_psymtab::get_compunit_symtab): Remove null checks for
per_cu_data.
dwarf2/index-write.c casts pointers to "dwarf2_psymtab *", but as far
as I can tell, it does not actually use any DWARF-specific fields of
the psymtab. So, this patch changes this code to use partial_symtab
instead. This removes nearly every cast, leaving just the unavoidable
one from addrmap iteration.
gdb/ChangeLog
2020-02-26 Tom Tromey <tom@tromey.com>
* dwarf2/index-write.c (psym_index_map): Change type.
(add_address_entry_worker, write_one_signatured_type)
(recursively_count_psymbols, recursively_write_psymbols)
(class debug_names, psyms_seen_size, write_gdbindex)
(write_debug_names): Use partial_symtab, not dwarf2_psymtab.
debuginfod is a lightweight web service that indexes ELF/DWARF debugging
resources by build-id and serves them over HTTP.
This patch enables GDB to query debuginfod servers for separate debug
files and source code when it is otherwise not able to find them.
GDB can be built with debuginfod using the --with-debuginfod configure
option.
This requires that libdebuginfod be installed and found at configure time.
debuginfod is packaged with elfutils, starting with version 0.178.
For more information see https://sourceware.org/elfutils/.
Tested on x86_64 Fedora 31.
gdb/ChangeLog:
2020-02-26 Aaron Merey <amerey@redhat.com>
* Makefile.in: Handle optional debuginfod support.
* NEWS: Update.
* README: Add --with-debuginfod summary.
* config.in: Regenerate.
* configure: Regenerate.
* configure.ac: Handle optional debuginfod support.
* debuginfod-support.c: debuginfod helper functions.
* debuginfod-support.h: Ditto.
* doc/gdb.texinfo: Add --with-debuginfod to configure options
summary.
* dwarf2/read.c (dwarf2_get_dwz_file): Query debuginfod servers
when a dwz file cannot be found.
* elfread.c (elf_symfile_read): Query debuginfod servers when a
debuginfo file cannot be found.
* source.c (open_source_file): Query debuginfod servers when a
source file cannot be found.
* top.c (print_gdb_configuration): Include
--{with,without}-debuginfod in the output.
gdb/testsuite/ChangeLog:
2020-02-26 Aaron Merey <amerey@redhat.com>
* gdb.debuginfod: New directory for debuginfod tests.
* gdb.debuginfod/main.c: New test file.
* gdb.debuginfod/fetch_src_and_symbols.exp: New tests.
This makes the thread apply command print the thread's name. The use
of target_pid_to_str is replaced by thread_target_id_str, which
provides the same output as "info threads".
Before:
(gdb) thread apply 2 bt
Thread 2 (Thread 0x7fd245602700 (LWP 3837)):
[...]
After:
(gdb) thread apply 2 bt
Thread 2 (Thread 0x7fd245602700 (LWP 3837) "HT cleanup"):
[...]
The thread's description header is pre-computed before running the
command since the command may change the selected inferior. This is
not permitted by thread_target_id_str as target_thread_name asserts
that `info->inf == current_inferior ()`.
This situation arises in the `gdb.threads/threadapply.exp` test which
kills and removes the inferior as part of a "thread apply" command.
gdb/ChangeLog:
* thread.c (thr_try_catch_cmd): Print thread name.
All these functions have their implementations in dwarf2/read.c, so move
their declarations to dwarf2/read.h. Move the doc to the header, at the
same time.
gdb/ChangeLog:
* dwarf2/loc.h (dwarf2_fetch_die_loc_sect_off,
dwarf2_fetch_die_loc_cu_off, dwarf2_fetch_constant_bytes,
dwarf2_fetch_die_type_sect_off): Move to...
* dwarf2/read.h (dwarf2_fetch_die_loc_sect_off,
dwarf2_fetch_die_loc_cu_off, dwarf2_fetch_constant_bytes,
dwarf2_fetch_die_type_sect_off): ... here.
* dwarf2/read.c (dwarf2_fetch_die_loc_sect_off,
dwarf2_fetch_die_loc_cu_off, dwarf2_fetch_constant_bytes,
dwarf2_fetch_die_type_sect_off): Move doc to header file.
Initially, gdb sets the language to auto/c:
...
$ gdb -q
(gdb) show language
The current source language is "auto; currently c".
...
And after loading a c++ executable, that changes to auto/c++:
...
(gdb) file a.out
Reading symbols from a.out...
(gdb) show language
The current source language is "auto; currently c++".
...
Now consider setting the language manually to c:
...
$ gdb -q
(gdb) show language
The current source language is "auto; currently c".
(gdb) set language c
(gdb) show language
The current source language is "c".
...
The resulting language is manual/c.
Surprisingly, a subsequent load of the c++ executable:
...
(gdb) file a.out
Reading symbols from a.out...
(gdb) show language
The current source language is "c++".
...
gets us language manual/c++.
Loading the file should get us either:
- auto/c++, or
- manual/c.
That is, either the manual setting should be reset by loading, or the manual
setting should persist.
Fix this in the manual/c fashion. [ Though we could make some gdb setting to
choose one or the other. ]
Build and reg-tested on x86_64-linux.
[ Note: In PR23710 comment 1 a cc1 binary is attached for which gdb is slow when
loading and settting a breakpoint on do_rpo_vn:
...
$ time.sh gdb cc1 -batch -ex "b do_rpo_vn"
Breakpoint 1 at 0xd40e30: do_rpo_vn. (2 locations)
maxmem: 1463496
real: 8.88
user: 8.59
system: 0.35
...
This fix enables a speedup by manually setting the language before
loading, reducing executing time with ~17%, due to not having to load the full
symtab containing main:
...
$ time.sh gdb -iex "set language c++" cc1 -batch -ex "b do_rpo_vn"
Breakpoint 1 at 0xd40e30: do_rpo_vn. (2 locations)
maxmem: 1067308
real: 7.36
user: 7.14
system: 0.28
... ]
gdb/ChangeLog:
2020-02-26 Tom de Vries <tdevries@suse.de>
PR gdb/25603
* symfile.c (set_initial_language): Exit-early if
language_mode == language_mode_manual.
gdb/testsuite/ChangeLog:
2020-02-26 Tom de Vries <tdevries@suse.de>
PR gdb/25603
* gdb.base/persistent-lang.cc: New test.
* gdb.base/persistent-lang.exp: New file.
The implementation is in dwarf2/read.c, so the declaration belongs in
dwarf2/read.h. Also, move the documentation there.
gdb/ChangeLog:
* dwarf2/loc.h (dwarf2_read_addr_index): Move...
* dwarf2/read.h (dwarf2_read_addr_index): ... here.
* dwarf2/read.c (dwarf2_read_addr_index): Move doc to header.
This commit adds support for negative Fortran array strides in one
limited case, that is the case of a single element array with a
negative array stride.
The changes in this commit will be required in order for more general
negative array stride support to work correctly, however, right now
other problems in GDB prevent negative array strides from working in
the general case.
The reason negative array strides don't currently work in the general
case is that when dealing with such arrays, the base address for the
objects data is actually the highest addressed element, subsequent
elements are then accessed with a negative offset from that address,
and GDB is not currently happy with this configuration.
The changes here can be summarised as, stop treating signed values as
unsigned, specifically, the array stride, and offsets calculated using
the array stride.
This issue was identified on the mailing list by Sergio:
https://sourceware.org/ml/gdb-patches/2020-01/msg00360.html
The test for this issue is a new one written by me as the copyright
status of the original test is currently unknown.
gdb/ChangeLog:
* gdbtypes.c (create_array_type_with_stride): Handle negative
array strides.
* valarith.c (value_subscripted_rvalue): Likewise.
gdb/testsuite/ChangeLog:
* gdb.fortran/derived-type-striding.exp: Add a new test.
* gdb.fortran/derived-type-striding.f90: Add pointer variable for
new test.
Just a trivial typo fix in a comment.
gdb/ChangeLog
2020-02-25 Luis Machado <luis.machado@linaro.org>
* aarch64-tdep.c (aarch64_vnv_type): Fix comment typo.
Since its implementation is in dwarf2/read.c, its declaration belongs in
dwarf2/read.h. Move the documentation to the .h at the same time.
gdb/ChangeLog:
* loc.h (dwarf2_get_die_type): Move to...
* read.h (dwarf2_get_die_type): ... here.
* read.c (dwarf2_get_die_type): Move doc to header.
This will prevent this script from updating the copyright year range
for those files.
Note that aclocal.m4 and configure are already in the EXCLUDE_ALL_LIST,
so they don't need to be added to the EXCLUDE_LIST.
gdb/ChangeLog:
* copypright.py (EXCLUDE_LIST): Add 'gnulib/config.in' and
'gnulib/Makefile.in' to the list.
I noticed that setup_type_unit_groups leaks the symtab vector -- it
allocates this with XNEWVEC, but from what I can tell, nothing frees
it. This patch changes it to use XOBNEWVEC.
Also, the type_unit_unshareable::num_symtabs member is assigned but
never read. So, this removes it.
gdb/ChangeLog
2020-02-24 Tom Tromey <tom@tromey.com>
* dwarf2/read.h (struct type_unit_unshareable) <num_symtabs>:
Remove.
* dwarf2/read.c (dwarf2_cu::setup_type_unit_groups): Use
XOBNEWVEC.
This converts the IS_TYPE_UNIT_GROUP to a method on
dwarf2_per_cu_data.
gdb/ChangeLog
2020-02-24 Tom Tromey <tom@tromey.com>
* dwarf2/read.h (struct dwarf2_per_cu_data) <type_unit_group_p>:
New method.
* dwarf2/read.c (IS_TYPE_UNIT_GROUP): Remove.
(dw2_do_instantiate_symtab, dw2_get_file_names)
(build_type_psymtab_dependencies, load_full_type_unit): Update.
This simplifies the setting and clearing of reading_partial_symbols,
by using scoped_restore in the function that reads partial symbols.
gdb/ChangeLog
2020-02-24 Tom Tromey <tom@tromey.com>
* dwarf2read.c (dwarf2_build_psymtabs_hard): Use
make_scoped_restore.
(dwarf2_psymtab::read_symtab): Don't clear
reading_partial_symbols.
Consider a test-case compiled with -g:
...
int main (void) {
static int b = 2;
return 0;
}
...
When running info locals in main, we get:
...
(gdb) info locals
No locals.
...
The info locals documentation states:
...
Print the local variables of the selected frame, each on a separate line.
These are all variables (declared either static or automatic) accessible at
the point of execution of the selected frame.
...
So, "info locals" should have printed static variable b.
The variable is present in dwarf info:
...
<2><14a>: Abbrev Number: 6 (DW_TAG_variable)
<14b> DW_AT_name : b
<153> DW_AT_const_value : 2
...
but instead of a location attribute, it has a const_value attribute, which
causes the corresponding symbol to have LOC_CONST, which causes info locals to
skip it.
Fix this by handling LOC_CONST in iterate_over_block_locals.
Build and reg-tested on x86_64-linux.
gdb/ChangeLog:
2020-02-24 Tom de Vries <tdevries@suse.de>
PR gdb/25592
* stack.c (iterate_over_block_locals): Handle LOC_CONST.
gdb/testsuite/ChangeLog:
2020-02-24 Tom de Vries <tdevries@suse.de>
PR gdb/25592
* gdb.base/info-locals-unused-static-var.c: New test.
* gdb.base/info-locals-unused-static-var.exp: New file.
With test-case gdb.gdb/unittest.exp, I run into:
...
(gdb) maintenance selftest^M
...
Running selftest help_doc_invariants.^M
help doc broken invariant: command 'layout next' help doc first line is \
not terminated with a '.' character^M
help doc broken invariant: command 'layout prev' help doc first line is \
not terminated with a '.' character^M
help doc broken invariant: command 'layout regs' help doc first line is \
not terminated with a '.' character^M
Self test failed: self-test failed at help-doc-selftests.c:95^M
...
Fix this by adding the missing '.' character.
Build and reg-tested on x86_64-linux.
gdb/ChangeLog:
2020-02-24 Tom de Vries <tdevries@suse.de>
* tui/tui-layout.c (_initialize_tui_layout): Fix help messages for
commands layout next/prev/regs.
I noticed that dwarf2_compile_expr_to_ax can be static. Nothing
outside of loc.c calls it.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* dwarf2/loc.h (dwarf2_compile_expr_to_ax): Don't declare.
* dwarf2/loc.c (dwarf2_compile_expr_to_ax): Now static.
I noticed that the TUI_DISASM_WIN macro cast the disassembly window to
a base type, rather than its correct type. This patch fixes this
oversight.
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-data.h (TUI_DISASM_WIN): Cast to tui_disasm_window.
Change-Id: Ied3dbac9ef3dc48ceb9e0850fe4ada3c316dd769
This adds "usage" text to the help for all all the TUI commands. In
some cases the usage is borderline, but I tend to think being complete
is preferable.
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-win.c (_initialize_tui_win): Add usage text.
* tui/tui-stack.c (_initialize_tui_stack): Add usage text.
* tui/tui-regs.c (_initialize_tui_regs): Add usage text.
* tui/tui.c (_initialize_tui): Add usage text.
Change-Id: I727f7a7cfc03efa248ef98f30a18be393819e30b
This changes a couple of TUI commands to use error_no_arg. The
commands are also simplified a bit, and changed to use other gdb CLI
utility functions like skip_to_space. This lets us removes a couple
of defines that don't interact properly with gettext.
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-win.c (tui_set_focus_command)
(tui_set_win_height_command): Use error_no_arg.
(_initialize_tui_win): Update help text.
(FOCUS_USAGE, WIN_HEIGHT_USAGE): Don't define.
Change-Id: I2bf95c2e5cfe1472d068388fa39f0cf07591b76c
This patch adds support for writing new TUI windows in Python.
2020-02-22 Tom Tromey <tom@tromey.com>
* NEWS: Add entry for gdb.register_window_type.
* tui/tui-layout.h (window_factory): New typedef.
(tui_register_window): Declare.
* tui/tui-layout.c (saved_tui_windows): New global.
(tui_apply_current_layout): Use it.
(tui_register_window): New function.
* python/python.c (do_start_initialization): Call
gdbpy_initialize_tui.
(python_GdbMethods): Add "register_window_type" function.
* python/python-internal.h (gdbpy_register_tui_window)
(gdbpy_initialize_tui): Declare.
* python/py-tui.c: New file.
* Makefile.in (SUBDIR_PYTHON_SRCS): Add py-tui.c.
gdb/doc/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* python.texi (Python API): Add menu item.
(TUI Windows In Python): New node.
gdb/testsuite/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* gdb.python/tui-window.exp: New file.
* gdb.python/tui-window.py: New file.
Change-Id: I85fbfb923a1840450a00a7dce113a05d7f048baa
do_tui_putc has some code to remove annotations from gdb output. This
was added in 2001, see commit a198b876bb.
However, I think this code is not needed. It seems very unlikely to
enable both annotations and the TUI, and in any case I think this is
something that should not be supported.
So, this patch removes this code.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-io.c (do_tui_putc): Don't omit annotations.
Change-Id: I05728110365a362d37c9821df9c8779316100bb8
I noticed that the TUI had two functions with similar names:
tui_set_win_focus_to and tui_set_win_with_focus.
However, one was just an implementation detail of the latter. So,
this patch removes tui_set_win_with_focus entirely, to avoid any
temptation to call it.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-win.c (tui_set_win_focus_to): Move to tui-data.c.
* tui/tui-data.h (tui_set_win_with_focus): Don't declare.
* tui/tui-data.c (tui_set_win_with_focus): Remove.
(tui_set_win_focus_to): Move from tui-win.c.
Change-Id: Idffddab773436bdf80d55480906d76b292981ef2
This adds a new global that maps from window names to window
constructor functions, and then changes tui_get_window_by_name and
validate_window_name to use it. This is another step toward
user-defined window types.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-layout.c (make_standard_window, get_locator_window): New
functions.
(known_window_types): New global.
(tui_get_window_by_name): Reimplement.
(initialize_known_windows): New function.
(validate_window_name): Rewrite.
(_initialize_tui_layout): Call initialize_known_windows.
Change-Id: I9037aac550299b9d945899220a30c2d3af9dd0de
TUI windows no longer need to store their type -- there's only a
single spot that uses this information, and it can be changed to use
dynamic_cast. (It could be cleaned up even more, by using a virtual
method, but I haven't done so.) This patch removes the "type" field
from tui_gen_win_info, and this in turn allows removing a couple of
enumerator constants.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui.h (enum tui_win_type) <LOCATOR_WIN, DATA_ITEM_WIN>:
Remove constants.
* tui/tui-winsource.h (struct tui_source_window_base)
<tui_source_window_base>: Remove parameter.
* tui/tui-winsource.c
(tui_source_window_base::tui_source_window_base): Remove
parameter.
(tui_source_window_base::refill): Update.
* tui/tui-stack.h (struct tui_locator_window)
<tui_locator_window>: Update.
* tui/tui-source.h (struct tui_source_window) <tui_source_window>:
Default the constructor.
* tui/tui-regs.h (struct tui_data_item_window)
<tui_data_item_window>: Default the constructor.
(struct tui_data_window) <tui_data_window>: Likewise.
* tui/tui-disasm.h (struct tui_disasm_window) <tui_disasm_window>:
Default the constructor.
* tui/tui-data.h (struct tui_gen_win_info) <tui_gen_win_info>:
Default the constructor.
<type>: Remove.
(struct tui_win_info) <tui_win_info>: Default the constructor.
* tui/tui-data.c (tui_win_info::tui_win_info): Remove.
* tui/tui-command.h (struct tui_cmd_window) <tui_cmd_window>:
Default the constructor.
Change-Id: I594cd07d2e0bba71ad594a6fb263904ce2febcd6
tui_delete_invisible_windows is only needed after applying a layout,
and tui_make_all_invisible is only needed before applying a layout.
This patch removes these functions, in favor of doing this management
directly in tui_apply_current_layout. This is needed so that the
lifetimes of non-built-in windows will be properly managed.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-wingeneral.h (tui_make_all_invisible): Don't declare.
* tui/tui-wingeneral.c (tui_make_all_invisible): Remove.
* tui/tui-win.c (tui_resize_all): Don't call
tui_delete_invisible_windows.
* tui/tui-layout.c (tui_apply_current_layout): Delete windows when
done.
(tui_set_layout): Update.
(tui_add_win_to_layout): Don't call tui_delete_invisible_windows.
* tui/tui-data.h (tui_delete_invisible_windows): Don't declare.
* tui/tui-data.c (tui_delete_invisible_windows): Remove.
Change-Id: Ia3603b021dcb7ec31700a4a32640cd09b00b8f3b
This changes tui_partial_win_by_name to correctly handle an ambiguous
name prefix. This will be important once the user can register new
window types.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-win.c (tui_partial_win_by_name): Handle ambiguity
correctly.
Change-Id: I59aaacd697eeab649164183457ef722dae58d60d
This reimplements tui_next_win and tui_prev_win. Now they account for
the possibility of windows not on tui_win_list.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-data.c (tui_next_win, tui_prev_win): Reimplement.
Change-Id: Ifcd402f76fe0a16e0fe9275a185d550279c01660
This changes the TUI to track all the instantiated windows in a new
global vector. After this, iteration over TUI windows is done by
simply iterating over this vector.
This approach makes it simpler to define new window types. In
particular, a subsequent patch will add the ability to define a TUI
window from Python.
Note that this series will not remove tui_win_list. This will
continue to exist in parallel, only because it was simpler to leave
this alone. Perhaps it could still be removed in the future.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-winsource.h (struct tui_source_window_iterator)
<inner_iterator>: New etytypedef.
<tui_source_window_iterator>: Take "end" parameter.
<tui_source_window_iterator>: Take iterator.
<operator*, advance>: Update.
<m_iter>: Change type.
<m_end>: New field.
(struct tui_source_windows) <begin, end>: Update.
* tui/tui-layout.c (tui_windows): New global.
(tui_apply_current_layout): Clear tui_windows.
(tui_layout_window::apply): Update tui_windows.
* tui/tui-data.h (tui_windows): Declare.
(all_tui_windows): Now inline function.
(class tui_window_iterator, struct all_tui_windows): Remove.
Change-Id: I6ab77976d6326f427178f725434f8f82046e0bbf
This changes the TUI layout engine to add horizontal splitting. Now,
windows can be side-by-side.
A horizontal split is defined using the "-horizontal" parameter to
"tui new-layout".
This also adds the first "winheight" test to the test suite. One open
question is whether we want a new "winwidth" command, now that
horizontal layouts are possible. This is easily done using the
generic layout code.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
PR tui/17850:
* tui/tui-win.c (tui_gen_win_info::max_width): New method.
* tui/tui-layout.h (class tui_layout_base) <get_sizes>: Add
"height" argument.
(class tui_layout_window) <get_sizes>: Likewise.
(class tui_layout_split) <tui_layout_split>: Add "vertical"
argument.
<get_sizes>: Add "height" argument.
<m_vertical>: New field.
* tui/tui-layout.c (tui_layout_split::clone): Update.
(tui_layout_split::get_sizes): Add "height" argument.
(tui_layout_split::adjust_size, tui_layout_split::apply): Update.
(tui_new_layout_command): Parse "-horizontal".
(_initialize_tui_layout): Update help string.
(tui_layout_split::specification): Add "-horizontal" when needed.
* tui/tui-layout.c (tui_layout_window::get_sizes): Add "height"
argument.
* tui/tui-data.h (struct tui_gen_win_info) <max_width, min_width>:
New methods.
gdb/doc/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
PR tui/17850:
* gdb.texinfo (TUI Commands): Document horizontal layouts.
gdb/testsuite/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
PR tui/17850:
* gdb.tui/new-layout.exp: Add horizontal layout and winheight
tests.
Change-Id: I38b35e504f34698578af86686be03c0fefd954ae
This changes tui_layout_base::adjust_size to return a new enum type.
I broke this out into a separate patch because it simplifies a
subsequent patch.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-layout.h (enum tui_adjust_result): New.
(class tui_layout_base) <adjust_size>: Return tui_adjust_result.
(class tui_layout_window) <adjust_size>: Return
tui_adjust_result. Rewrite.
(class tui_layout_split) <adjust_size>: Return tui_adjust_result.
* tui/tui-layout.c (tui_layout_split::adjust_size): Update.
Change-Id: I821b48ab06a9b9485875e147bd08a3bc46b900a0
The new TUI layout engine has support for "sub-layouts" -- this is a
layout that includes another layout as a child. A sub-layout is
treated as a unit when allocating space.
There's not a very strong reason to use sub-layouts currently. This
patch exists to introduce the idea, and to simplify the subsequent
patch that adds horizontal layouts -- where sub-layouts are needed.
Because this patch won't go in on its own, I chose to defer
documenting this change until the subsequent horizontal layout patch.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-layout.h (class tui_layout_split) <add_split>: Change
parameter and return types.
(class tui_layout_base) <specification>: Add "depth".
(class tui_layout_window) <specification>: Add "depth".
(class tui_layout_split) <specification>: Add "depth".
* tui/tui-layout.c (tui_layout_split::add_split): Change parameter
and return types.
(tui_new_layout_command): Parse sub-layouts.
(_initialize_tui_layout): Update help string.
(tui_layout_window::specification): Add "depth".
(add_layout_command): Update.
gdb/testsuite/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* gdb.tui/new-layout.exp: Add sub-layout tests.
Change-Id: Iddf52d067a552c168b8a67f29caf7ac86404b10c
This adds a new command, "tui new-layout". This command can be used
to define a new TUI window layout.
The command is used like:
(gdb) tui new-layout name src 1 regs 1 status 0 cmd 1
The first argument is the name of the layout. In this example, it is
"name", so the new layout could be seen by "layout name".
Subsequent arguments come in pairs, where the first item in a pair is
the name of a window, and the second item in a pair is the window's
weight. A weight is just an integer -- a window's allocated size is
proportional to the total of the weights given. So, in the above
example, all windows will have the same size (the status windows's
weight does not matter, because it has fixed height).
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* NEWS: Add "tui new-layout" item.
* tui/tui-layout.c (add_layout_command): Return cmd_list_element.
Add new-layout command to help text.
(validate_window_name): New function.
(tui_new_layout_command): New function.
(_initialize_tui_layout): Register "new-layout".
(tui_layout_window::specification): New method.
(tui_layout_window::specification): New method.
* tui/tui-layout.h (class tui_layout_base) <specification>: New
method.
(class tui_layout_window) <specification>: New method.
(class tui_layout_split) <specification>: New method.
gdb/doc/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* gdb.texinfo (TUI Overview): Mention user layouts.
(TUI Commands): Document "tui new-layout".
gdb/testsuite/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* gdb.tui/new-layout.exp: New file.
Change-Id: Id7c3ace20ab1e8924f8f4ad788f40210f58a5c05
This changes the TUI so that the available layouts are no longer
completely hard-coded. "enum tui_layout_type" is removed, and then
all the fallout from this is fixed up.
This patch also reimplements the "layout" command to be a prefix
command. The concrete layouts are simply sub-commands now. This
provides completion and correct abbreviation behavior for free.
Finally, this also changes the name of the locator window to "status".
This matches the documentation and will be exposed to the user in a
subsequent patch.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui.c (tui_enable): Call tui_set_initial_layout.
* tui/tui-win.c (window_name_completer): Update comment.
* tui/tui-layout.h (class tui_layout_base) <replace_window>:
Declare method.
(class tui_layout_window) <replace_window>: Likewise.
(class tui_layout_split) <replace_window>: Likewise.
(tui_set_layout): Don't declare.
(tui_set_initial_layout): Declare function.
* tui/tui-layout.c (layouts, applied_skeleton, src_regs_layout)
(asm_regs_layout): New globals.
(tui_current_layout, show_layout): Remove.
(tui_set_layout, tui_add_win_to_layout): Rewrite.
(find_layout, tui_apply_layout): New function.
(layout_completer): Remove.
(tui_next_layout): Reimplement.
(tui_next_layout_command): New function.
(tui_set_initial_layout, tui_prev_layout_command): New functions.
(tui_regs_layout): Reimplement.
(tui_regs_layout_command): New function.
(extract_display_start_addr): Rewrite.
(next_layout, prev_layout): Remove.
(tui_layout_window::replace_window): New method.
(tui_layout_split::replace_window): New method.
(destroy_layout): New function.
(layout_list): New global.
(add_layout_command): New function.
(initialize_layouts): Update.
(tui_layout_command): New function.
(_initialize_tui_layout): Install "layout" commands.
* tui/tui-data.h (enum tui_layout_type): Remove.
(tui_current_layout): Don't declare.
Change-Id: I9b5f7ab3ce838d6b340b8c373ef649a8e0a74b73
This reimplements the low-level layout function that is used by the
"tui reg" command. Now it simply calls into the existing "layout"
command, though this will be changed again in a subsequent patch. The
rationale for this patch is that it makes it simpler to remove
"enum tui_layout_type".
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-regs.c (tui_reg_layout): Remove.
(tui_reg_command): Use tui_regs_layout.
* tui/tui-layout.h (tui_reg_command): Declare.
* tui/tui-layout.c (tui_reg_command): New function.
Change-Id: I0ca6884e2967005e7d3fbf5f13a0ac8f9c3298cf
The TUI "C-x 1" key binding removes TUI windows, based on the current
layout. With user-defined layouts, this is no longer easy to do.
This patch changes "C-x 1" to simply delete windows, leaving just the
focus window, the locator, and the command window.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui.c (tui_rl_delete_other_windows): Call
tui_remove_some_windows.
* tui/tui-layout.h (class tui_layout_base) <remove_windows>:
Declare method.
(class tui_layout_window) <remove_windows>: New method.
(class tui_layout_split) <remove_windows>: Declare.
(tui_remove_some_windows): Declare.
* tui/tui-layout.c (tui_remove_some_windows): New function.
(tui_layout_split::remove_windows): New method.
Change-Id: If186f9c3f263913e963b965204481d1b4385c6d4
The TUI "C-x 2" binding tries to switch to a different layout based on
the current layout. Once user-defined layouts are available, this
won't really make sense. I wasn't entirely sure how to handle this.
This patch changes the binding to simply cycle through the existing
layouts. I considered this a reasonable, though not ideal,
compromise.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui.c (tui_rl_change_windows): Call tui_next_layout.
* tui/tui-layout.h (tui_next_layout): Declare.
* tui/tui-layout.c (tui_next_layout): New function.
Change-Id: Ic101f0e3831a4235a048b3090ef60f025f7449bb
tui_data_window creates new curses windows, but does not pass in
coordinates relative to the data window's origin. This means that the
data window could only ever be displayed as the topmost window in a
layout. This is not a currently problem, because all the existing
layouts do this; but a subsequent patch will add user-defined layouts,
which could do otherwise.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-regs.c (tui_data_window::display_registers_from): Use
correct coordinates.
Change-Id: I5101f2b2869557b87381ebdeebd9b7fd28687831
tui_add_win_to_layout is only ever called for the source or assembly
windows. This simplifies the function by removing the DATA_WIN case.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-layout.h (tui_add_win_to_layout): Add comment.
* tui/tui-layout.c (tui_add_win_to_layout): Add assert. Remove
DATA_WIN case.
Change-Id: Idfca902c6c90153acc5d19af4c33aa74bc3caf31
This is a minor cleanup to change tui_get_low_disassembly_address to
use TUI_DISASM_WIN, rather than the tui_win_list array. This is more
in line with what the rest of the TUI code does.
gdb/ChangeLog
2020-02-22 Tom Tromey <tom@tromey.com>
* tui/tui-disasm.c (tui_get_low_disassembly_address): Use
TUI_DISASM_WIN, not tui_win_list.
Change-Id: I999335ee3f63a4b570e84f320236b78f2bd5b780
Andrew Burgess
Christian Biesinger
Jon Turney
Tom de Vries
Simon Marchi
Aaron Merey
Tom Tromey
Tom Tromey
Jérémie Galarneau
Simon Marchi
Luis Machado
Joel Brobecker