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This started with me running into this comment in symfile.c:
/* FIXME, should use print_sys_errmsg but it's not filtered. */
gdb_printf (_("`%ps' has disappeared; keeping its symbols.\n"),
styled_string (file_name_style.style (), filename));
In this particular case I think I disagree with the comment; I think
the output should be a warning rather than just a message printed to
gdb_stdout, I think when the executable, or some other objfile that is
currently being debugged, disappears from disk, this is likely an
unexpected situation, and worth warning the user about.
So, in theory, I could just call print_sys_errmsg and remove the
comment, but that would mean loosing the filename styling in the
output... so in the end I remove the comment and updated the code to
call warning.
But that got me looking at print_sys_errmsg and how it's used.
Currently the function takes a string and an errno, and prints, to
stderr, the string followed by the result of calling strerror on the
errno.
In some places the string passed to print_sys_errmsg is just a
filename, and this is used when something goes wrong. In these cases,
I think calling warning rather than gdb_printf to gdb_stderr, would be
better, and in fact, in a couple of places we manually print a
"warning" prefix, and then call print_sys_errmsg. And so, for these
users I have added a new function warning_filename_and_errno, which
takes a filename, which is printed with styling, and an errno, which
is passed through strerror and the resulting string printed. This new
function calls warning to print its output. I then updated some of
the print_sys_errmsg users to use this new function.
Some other users of print_sys_errmsg are also emitting what is clearly
a warning, however, the string being passed in is more than just a
filename, so the new warning_filename_and_errno function can't be
used, it would style the whole string. For these users I have
switched to calling warning directly, this allows me to style the
warning message correctly.
Finally, in inflow.c there is one last call to print_sys_errmsg, in
this case I just inlined the definition of print_sys_errmsg. This is
a really weird case, as after printing this message GDB just does a
hard exit. This is pretty old code, dating back to the initial GDB
import, I guess it should be updated to call error() maybe, but I'm
reluctant to make this change as part of this commit, just in case
there's some reason why we can't throw an error at this point.
With that done there are now no users of print_sys_errmsg, and so the
old function can be removed.
While I was doing all of the above I added some additional filename
styling in soure.c, this is in an else block where the if contained
the print_sys_errmsg call, so these felt related.
And finally, while I was updating the uses of print_sys_errmsg in
procfs.c, I noticed that we used a static errmsg buffer to format some
error strings. As the above changes got rid of one of the users of
errmsg I also removed the other two users, and the static buffer.
There were a couple of tests that depended on the existing output
message format that needed updating. In one case we gained an extra
'warning: ' prefix, and in the other 'Warning: ' becomes 'warning: ',
I think in both cases the new output is an improvement.
Approved-By: Tom Tromey <tom@tromey.com>
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After the commit:
commit 6647f05df023b63bbe056e9167e9e234172fa2ca
Date: Tue Jan 24 18:13:38 2023 +0100
gdb: defer warnings when loading separate debug files
It was pointed out[1] that the warnings being deferred and then later
emitted lacked styling. The warnings lacked styling before the above
commit, but it was suggested that the filenames in these warnings
should be styled, and this commit does this.
There were a couple of previous attempts[2][3][4] to solve this
problem, but these all tried to extend the mechanism introduced in the
above commit, the deferred warnings were placed directly into a
std::vector, but now we tried to, when appropriate, style these
warnings. The review feedback that this approach looked too complex.
So instead, this revision adds a new helper class 'deferred_warnings'
which can be used to collect a set of deferred warnings, and then emit
these deferred warnings later, if needed. This helper class hides the
complexity, so at the point the deferred warning is created no extra
logic is required.
The deferred_warnings class will style the deferred warnings only if
gdb_stderr supports styling. GDB's warnings are sent to gdb_stderr,
so this should ensure we only style when expected.
There was also review feedback[5] that all of the warnings should be
bundled into a single string_file, this has not been done. I feel
pretty strongly that separate warnings should be emitted using
separate "warning" calls. If we do end up with multiple warnings in
this case they aren't really related, one will be about looking up
debug via .gnu_debuglink, while the other will be about build-id based
lookup. So I'd really rather keep the warnings separate.
[1] https://inbox.sourceware.org/gdb-patches/87edr9pcku.fsf@tromey.com/
[2] https://inbox.sourceware.org/gdb-patches/20230216195604.2685177-1-ahajkova@redhat.com/
[3] https://inbox.sourceware.org/gdb-patches/20230217123547.2737612-1-ahajkova@redhat.com/
[4] https://inbox.sourceware.org/gdb-patches/20230320145638.1202335-1-ahajkova@redhat.com/
[5] https://inbox.sourceware.org/gdb-patches/87o7nh1g8h.fsf@tromey.com/
Co-Authored-By: Alexandra Hájková <ahajkova@redhat.com>
Approved-By: Simon Marchi <simon.marchi@efficios.com>
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This reverts commit 02601231fdd91a7bd4837ce202906ea2ce661489.
This commit was a refactoring to remove an xrealloc and simplify
utils.[ch]. However, it has a flaw -- it mishandles a substitution
like "$datadir/subdir".
I am backing out the patch in the interests of fixing the regression
before GDB 14. It can be reinstated (with modifications) later if we
like.
Regression tested on x86-64 Fedora 36.
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Add template functions assign_return_if_changed and assign_set_if_changed in
gdb/utils.h:
...
template<typename T> void assign_set_if_changed (T &lval, const T &val, bool &changed)
{ ... }
template<typename T> bool assign_return_if_changed (T &lval, const T &val)
{ ... }
...
This allows us to rewrite code like this:
...
if (tui_border_attrs != entry->value)
{
tui_border_attrs = entry->value;
need_redraw = true;
}
...
into this:
...
need_redraw |= assign_return_if_changed<int> (tui_border_attrs, entry->value);
...
or:
...
assign_set_if_changed<int> (tui_border_attrs, entry->value, need_redraw);
...
The names are a composition of the functionality. The functions:
- assign VAL to LVAL, and either
- return true if the assignment changed LVAL, or
- set CHANGED to true if the assignment changed LVAL.
Tested on x86_64-linux.
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This simplifies auto_load_expand_dir_vars to first split the string,
then do any needed substitutions. This was suggested by Simon, and is
much simpler than the current approach.
Then this patch also removes substitute_path_component, as it is no
longer called. This is nice because it helps with the long term goal
of removing utils.h.
Regression tested on x86-64 Fedora 36.
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error_stream is trivial and only used in a couple of spots in
breakpoint.c. This patch removes it in favor of just writing it out
at the spots where it was used.
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With TERM=ansi, when resizing a TUI window from LINES/COLUMNS 31/118
(maximized) to 20/78 (de-maximized), I get a garbled screen (that ^L doesn't
fix) and a message:
...
@@ resize done 0, size = 77x20
...
with the resulting width being 77 instead of the expected 78.
[ The discrepancy also manifests in CLI, filed as PR30346. ]
The discrepancy comes from tui_resize_all, where we ask readline for the
screen size:
...
rl_get_screen_size (&screenheight, &screenwidth);
...
As it happens, when TERM is set to ansi, readline decides that the terminal
cannot auto-wrap lines, and reserves one column to deal with that, and as a
result reports back one less than the actual screen width:
...
$ echo $COLUMNS
78
$ TERM=xterm gdb -ex "show width" -ex q
Number of characters gdb thinks are in a line is 78.
$ TERM=ansi gdb -ex "show width" -ex q
Number of characters gdb thinks are in a line is 77.
...
In tui_resize_all, we need the actual screen width, and using a screenwidth of
one less than the actual value garbles the screen.
This is currently not causing trouble in testing because we have a workaround
in place in proc Term::resize. If we disable the workaround:
...
- stty columns [expr {$_cols + 1}] < $::gdb_tty_name
+ stty columns $_cols < $::gdb_tty_name
...
and dump the screen we get the same type of screen garbling:
...
0 +---------------------------------------+|
1 ||
2 ||
3 ||
...
Another way to reproduce the problem is using command "maint info screen".
After starting gdb with TERM=ansi, entering TUI, and issuing the command, we
get:
...
Number of characters curses thinks are in a line is 78.
...
and after maximizing and demaximizing the window we get:
...
Number of characters curses thinks are in a line is 77.
...
If we use TERM=xterm, we do get the expected 78.
Fix this by:
- detecting when readline will report back less than the actual screen width,
- accordingly setting a new variable readline_hidden_cols,
- using readline_hidden_cols in tui_resize_all to fix the resize problem, and
- removing the workaround in Term::resize.
The test-case gdb.tui/empty.exp serves as regression test.
I've applied the same fix in tui_async_resize_screen, the new test-case
gdb.tui/resize-2.exp serves as a regression test for that change. Without
that fix, we have:
...
FAIL: gdb.tui/resize-2.exp: again: gdb width 80
...
Tested on x86_64-linux.
PR tui/30337
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30337
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This changes gdb to use scalar arithmetic for expression evaluation.
I suspect this patch is not truly complete, as there may be code paths
that still don't correctly handle 128-bit integers. However, many
things do work now.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30190
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Now that gdb_indent.sh has been removed, I think it makes sense to
also remove the directives intended for GNU indent.
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The following patch adds a hash type for gdb::string_view in gdbsupport,
which will use the fast_hash function. Move the latter to gdbsupport.
Change-Id: Id74510e17801e775bd5ffa5f443713d79adf14ad
Approved-By: Andrew Burgess <aburgess@redhat.com>
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This commit is the result of running the gdb/copyright.py script,
which automated the update of the copyright year range for all
source files managed by the GDB project to be updated to include
year 2023.
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PR gdb/28947
The address_significant gdbarch setting was introduced as a way to remove
non-address bits from pointers, and it is specified by a constant. This
constant represents the number of address bits in a pointer.
Right now AArch64 is the only architecture that uses it, and 56 was a
correct option so far.
But if we are using Pointer Authentication (PAuth), we might use up to 2 bytes
from the address space to store the required information. We could also have
cases where we're using both PAuth and MTE.
We could adjust the constant to 48 to cover those cases, but this doesn't
cover the case where GDB needs to sign-extend kernel addresses after removal
of the non-address bits.
This has worked so far because bit 55 is used to select between kernel-space
and user-space addresses. But trying to clear a range of bits crossing the
bit 55 boundary requires the hook to be smarter.
The following patch renames the gdbarch hook from significant_addr_bit to
remove_non_address_bits and passes a pointer as opposed to the number of
bits. The hook is now responsible for removing the required non-address bits
and sign-extending the address if needed.
While at it, make GDB and GDBServer share some more code for aarch64 and add a
new arch-specific testcase gdb.arch/aarch64-non-address-bits.exp.
Bug-url: https://sourceware.org/bugzilla/show_bug.cgi?id=28947
Approved-By: Simon Marchi <simon.marchi@efficios.com>
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It seems to me that streq and compare_cstrings belong near the other
string utility functions in common-utils.h; and furthermore that streq
ought to be inlined. This patch makes this change.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
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I stumbled across subset_compare today, and after looking at the
callers I realized it could be removed and replaced with calls to
startswith.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
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The throw_perror_with_name function is not used outside of utils.c
right now. And as perror_with_name is just a wrapper around
throw_perror_with_name, then any future calls would be to
perror_with_name.
Lets make throw_perror_with_name static.
There should be no user visible changes after this commit.
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I don't think it's very useful to return the character from gdb_putc,
so this patch changes it to return void.
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This patch updates some comments in utils.h to more closely reflect
the new reality.
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Nothing calls vfprintf_styled any more, so remove it.
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fprintf_symbol_filtered is misnamed, because whether filtering happens
is now up to the stream. This renames it to fprintf_symbol, which
isn't a great name (the first "f" doesn't mean much and the second one
is truly meaningless here), but "print_symbol" was already taken.
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puts_filtered_tabular is now misnamed, because whether filtering
happens is now up to the stream. So, rename it. (This function is
pretty weird, and should probably be rewritten to avoid using the
chars_printed global, and moved into objc-lang.c. However, I haven't
done so.)
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print_spaces_filtered is now misnamed, because whether filtering
happens is up to the stream. So, rename it.
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Now that filtered and unfiltered output can be treated identically, we
can unify the printf family of functions. This is done under the name
"gdb_printf". Most of this patch was written by script.
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Now that filtered and unfiltered output can be treated identically, we
can unify the putc family of functions. This is done under the name
"gdb_putc". Most of this patch was written by script.
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Now that filtered and unfiltered output can be treated identically, we
can unify the puts family of functions. This is done under the name
"gdb_puts". Most of this patch was written by script.
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Now that filtered and unfiltered output can be treated identically, we
can unify the vprintf family of functions: vprintf_filtered,
vprintf_unfiltered, vfprintf_filtered and vfprintf_unfiltered. (For
the gdb_stdout variants, recall that only printf_unfiltered gets truly
unfiltered output at this point.) This removes one such function and
renames the remaining two to "gdb_vprintf". All callers are updated.
Much of this patch was written by script.
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fputs_styled_unfiltered is only called from cli_ui_out, so remove it.
This area will be further simplified in future patches.
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This rewrites the output pager as a ui_file implementation.
A new header is introduced to declare the pager class. The
implementation remains in utils.c for the time being, because there
are some static globals there that must be used by this code. (This
could be cleaned up at some future date.)
I went through all the text output in gdb to ensure that this change
should be ok. There are a few cases:
* Any existing call to printf_unfiltered is required to be avoid the
pager. This is ensured directly in the implementation.
* All remaining calls to the f*_unfiltered functions -- the ones that
take an explicit ui_file -- either send to an unfiltered stream
(e.g., gdb_stderr), which is obviously ok; or conditionally send to
gdb_stdout
I investigated all such calls by searching for:
grep -e '\bf[a-z0-9_]*_unfiltered' *.[chyl] */*.[ch] | grep -v gdb_stdlog | grep -v gdb_stderr
This yields a number of candidates to check.
* The breakpoint _print_recreate family, and
save_trace_state_variables. These are used for "save" commands
and so are fine.
* Things printing to a temporary stream. Obviously ok.
* Disassembly selftests.
* print_gdb_help - this is non-obvious, but ok because paging isn't
yet enabled at this point during startup.
* serial.c - doens't use gdb_stdout
* The code in compile/. This is all printing to a file.
* DWARF DIE dumping - doesn't reference gdb_stdout.
* Calls to the _filtered form -- these are all clearly ok, because if
they are using gdb_stdout, then filtering will still apply; and if
not, then filtering never applied and still will not.
Therefore, at this point, there is no longer any distinction between
all the other _filtered and _unfiltered calls, and they can be
unified.
In this patch, take special note of the vfprintf_maybe_filtered and
ui_file::vprintf change. This is one instance of the above idea,
erasing the distinction between filtered and unfiltered -- in this
part of the change, the "unfiltered_output" flag is never passe to
cli_ui_out. Subsequent patches will go much further in this
direction.
Also note the can_emit_style_escape changes in ui-file.c. Checking
against gdb_stdout or gdb_stderr was always a bit of a hack; and now
it is no longer needed, because this is decision can be more fully
delegated to the particular ui_file implementation.
ui_file::can_page is removed, because this patch removed the only call
to it.
I think this is the main part of fixing PR cli/7234.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=7234
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This removes vfprintf_styled_no_gdbfmt, inlining it at the sole point
of call.
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At the end of this series, the use of unfiltered output will be very
restricted -- only places that definitely need it will use it. To
this end, I thought it would be good to reduce the number of
_unfiltered APIs that are exposed. This patch changes gdb so that
only printf_unfiltered exists. (After this patch, the f* variants
still exist as well, but those will be removed later.)
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This adds a "timestamped_file" subclass of ui_file. This class adds a
timestamp to its output when appropriate. That is, it follows the
rule already used in vfprintf_unfiltered of adding a timestamp at most
once per write.
The new class is not yet used.
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This patch adds support for wild template parameter list matches, similar
to how ABI tags or function overloads are now handled.
With this patch, users will be able to "gloss over" the details of matching
template parameter lists. This is accomplished by adding (yet more) logic
to strncmp_iw_with_mode to skip parameter lists if none is explicitly given
by the user.
Here's a simple example using gdb.linespec/cpls-ops.exp:
Before
------
(gdb) ptype test_op_call
type = struct test_op_call {
public:
void operator()(void);
void operator()(int);
void operator()(long);
void operator()<int>(int *);
}
(gdb) b test_op_call::operator()
Breakpoint 1 at 0x400583: test_op_call::operator(). (3 locations)
(gdb) i b
Num Type Disp Enb Address What
1 breakpoint keep y <MULTIPLE>
1.1 y 0x400583 in test_op_call::operator()(int)
at cpls-ops.cc:43
1.2 y 0x40058e in test_op_call::operator()()
at cpls-ops.cc:47
1.3 y 0x40059e in test_op_call::operator()(long)
at cpls-ops.cc:51
The breakpoint at test_op_call::operator()<int> was never set.
After
-----
(gdb) b test_op_call::operator()
Breakpoint 1 at 0x400583: test_op_call::operator(). (4 locations)
(gdb) i b
Num Type Disp Enb Address What
1 breakpoint keep y <MULTIPLE>
1.1 y 0x400583 in test_op_call::operator()(int)
at cpls-ops.cc:43
1.2 y 0x40058e in test_op_call::operator()()
at cpls-ops.cc:47
1.3 y 0x40059e in test_op_call::operator()(long)
at cpls-ops.cc:51
1.4 y 0x4008d0 in test_op_call::operator()<int>(int*)
at cpls-ops.cc:57
Similar to how scope lookups work, passing "-qualified" to the break command
will cause a literal lookup of the symbol. In the example immediately above,
this will cause GDB to only find the three non-template functions.
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I think it only really makes sense to call wrap_here with an argument
consisting solely of spaces. Given this, it seemed better to me that
the argument be an int, rather than a string. This patch is the
result. Much of it was written by a script.
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gdb has some extensions and helpers for working with the libiberty
hash table. This patch consolidates these and moves them to
gdbsupport.
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This moves the gdb_argv class to a new header in gdbsupport.
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In my tour of the ui_file subsystem, I found that fputstr and fputstrn
can be simplified. The _filtered forms are never used (and IMO
unlikely to ever be used) and so can be removed. And, the interface
can be simplified by removing a callback function and moving the
implementation directly to ui_file.
A new self-test is included. Previously, I think nothing was testing
this code.
Regression tested on x86-64 Fedora 34.
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This commit brings all the changes made by running gdb/copyright.py
as per GDB's Start of New Year Procedure.
For the avoidance of doubt, all changes in this commits were
performed by the script.
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gdbtypes.h uses core_addr_eq and core_addr_hash in a weird way: taking
the address of a member and then passing this (as a void*) to these
functions.
It seems better to simply inline the ordinary code here. CORE_ADDR is
a scalar so it can be directly compared, and the identity hash
function seems safe to assume as well.
After this, core_addr_eq and core_addr_hash are unused, so this patch
removes them.
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gdb_print_host_address is just a simple wrapper around
fprintf_filtered. However, it is readily replaced in all callers by a
combination of %s and call to host_address_to_string. This also
simplifies the code, so I think it's worthwhile to remove this
function.
Regression tested on x86-64 Fedora 64.
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gdb_bfd.c contains most of gdb's BFD-related utility functions.
However, gdb_bfd_errmsg is in utils.c. It seemed better to me to move
this out of util.[ch] and into the BFD-related file instead.
Tested by rebuilding.
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This removes the print_spaces helper function, in favor of using the
"*%s" idiom that's already used in many places in gdb. One spot (in
symmisc.c) is changed to use print_spaces_filtered, because the rest
of that function is using filtered output. (This highlights one way
that the printf idiom is better -- this error is harder to make when
using that.)
Regression tested on x86-64 Fedora 34.
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I noticed that puts_debug isn't used in the tree. git log tells me
that the last use was removed in 2015:
commit 40e0b27177e747600d3ec186458fe0e482a1cf77
Author: Pedro Alves <palves@redhat.com>
Date: Mon Aug 24 15:40:26 2015 +0100
Delete the remaining ROM monitor targets
... and this commit mentions that the code being removed here probably
hadn't worked for 6 years prior to that.
Based on this, I'm removing puts_debug. I don't think it's useful.
Tested by rebuilding.
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n_spaces keeps the spaces in a static buffer. If a caller overwrites
these, it may give an incorrect result to a subsequent caller. So,
make the return type const to help avoid this outcome.
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This commits adds const versions for the GET and AS_ARRAX_VIEW methods
of gdb_argv. Those methods will be required in the following patch of
the series.
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In a bigger series I'm working on, it is convenient to have a
libiberty hash table that manages objects allocated with 'new'. To
make this simpler, I wrote a small template function to serve as a
concise wrapper. Then I realized that this could be reused in a few
other places.
gdb/ChangeLog
2021-05-26 Tom Tromey <tom@tromey.com>
* dwarf2/read.c (allocate_type_unit_groups_table)
(handle_DW_AT_stmt_list, allocate_dwo_file_hash_table): Use
htab_delete_entry.
(free_line_header_voidp): Remove.
* completer.c
(completion_tracker::completion_hash_entry::deleter): Remove.
(completion_tracker::discard_completions): Use htab_delete_entry.
* utils.h (htab_delete_entry): New template function.
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Now that libiberty includes htab_eq_string, we can remove the
identical function from gdb.
gdb/ChangeLog
2021-05-07 Tom Tromey <tom@tromey.com>
* breakpoint.c (ambiguous_names_p): Use htab_eq_string.
* utils.c (streq_hash): Remove.
* utils.h (streq_hash): Don't declare.
* completer.c (completion_tracker::discard_completions): Update
comment.
* ada-lang.c (_initialize_ada_language): Use htab_eq_string.
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This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
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After seeing Simon's patch, I thought maybe it was finally time to
remove printfi_filtered and fprintfi_filtered, in favor of using the
"%*s" approach to indenting.
In this patch I took the straightforward approach of always adding a
leading "%*s", even when the format already started with "%s", to
avoid the trickier form of:
printf ("%*s", -indent, string)
Regression tested on x86-64 Fedora 32.
Let me know what you think.
gdb/ChangeLog
2020-12-17 Tom Tromey <tromey@adacore.com>
* gdbtypes.c (print_args, dump_fn_fieldlists, print_cplus_stuff)
(print_gnat_stuff, print_fixed_point_type_info)
(recursive_dump_type): Update.
* go32-nat.c (go32_sysinfo, display_descriptor): Update.
* c-typeprint.c (c_type_print_base_struct_union)
(c_type_print_base_1): Update.
* rust-lang.c (rust_internal_print_type): Update.
* f-typeprint.c (f_language::f_type_print_base): Update.
* utils.h (fprintfi_filtered, printfi_filtered): Remove.
* m2-typeprint.c (m2_record_fields): Update.
* p-typeprint.c (pascal_type_print_base): Update.
* compile/compile-loc2c.c (push, pushf, unary, binary)
(do_compile_dwarf_expr_to_c): Update.
* utils.c (fprintfi_filtered, printfi_filtered): Remove.
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Add a progress meter. It's not used anywhere yet.
gdb/ChangeLog:
2020-12-16 Tom Tromey <tom@tromey.com>
Tom Tromey <tromey@redhat.com>
Tom de Vries <tdevries@suse.de>
* utils.h (get_chars_per_line): Declare.
* utils.c (get_chars_per_line): New function.
(fputs_maybe_filtered): Handle '\r'.
* ui-out.h (ui_out::progress_meter): New class.
(ui_out::progress, ui_out::do_progress_start)
(ui_out::do_progress_notify, ui_out::do_progress_end): New
methods.
* ui-out.c (do_progress_end)
(make_cleanup_ui_out_progress_begin_end, ui_out_progress): New
functions.
* mi/mi-out.h (mi_ui_out::do_progress_start)
(mi_ui_out::do_progress_notify, mi_ui_out::do_progress_end): New
methods.
* cli-out.h (struct cli_ui_out) <do_progress_start,
do_progress_notify, do_progress_end>: New methods.
<enum meter_stat, struct cli_progress_info>: New.
<m_meters>: New member.
* cli-out.c (cli_ui_out::do_progress_start)
(cli_ui_out::do_progress_notify, cli_ui_out::do_progress_end): New
methods.
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This is a generic function which I would like to use in a followup
patch adding support for fixed-point types. So this commit moves it
out of valarith.c into util.c, and makes it non-static.
gdb/ChangeLog:
* utils.h (uinteger_pow): Add declaration.
* utils.c (uinteger_pow): Moved here (without changes)...
* valarith.c (uinteger_pow): ... from here.
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This changes gdb/compile to use gdb_argv directly, rather than
manually managing the arrays itself. A few new helpers are added to
gdb_argv.
gdb/ChangeLog
2020-09-23 Tom Tromey <tom@tromey.com>
* utils.h (class gdb_argv): Add move operators.
<append>: New methods.
* compile/compile.c (build_argc_argv): Remove.
(compile_args_argc): Remove.
(compile_args_argv): Change type.
(set_compile_args): Simplify.
(append_args): Remove.
(filter_args): Remove argcp parameter.
(get_args): Return gdb_argv. Simplify.
(compile_to_object): Update.
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