After these two commits:
commit 4fb7bc4b147fd30b781ea2dad533956d0362295a
Date: Mon Mar 7 13:49:21 2022 +0000
readline: back-port changes needed to properly detect EOF
commit 91395d97d905c31ac38513e4aaedecb3b25e818f
Date: Tue Feb 15 17:28:03 2022 +0000
gdb: handle bracketed-paste-mode and EOF correctly
It was observed that, if a previous command is selected at the
readline prompt using the up arrow key, then when the command is
accepted (by pressing return) an unexpected 'quit' message will be
printed by GDB. Here's an example session:
(gdb) p 123
$1 = 123
(gdb) p 123
quit
$2 = 123
(gdb)
In this session the second 'p 123' was entered not by typing 'p 123',
but by pressing the up arrow key to select the previous command. It
is important that the up arrow key is used, typing Ctrl-p will not
trigger the bug.
The problem here appears to be readline's EOF detection when handling
multi-character input sequences. I have raised this issue on the
readline mailing list here:
https://lists.gnu.org/archive/html/bug-readline/2022-04/msg00012.html
a solution has been proposed here:
https://lists.gnu.org/archive/html/bug-readline/2022-04/msg00016.html
This patch includes a test for this issue as well as a back-port of
(the important bits of) readline commit:
commit 2ef9cec8c48ab1ae3a16b1874a49bd1f58eaaca1
Date: Wed May 4 11:18:04 2022 -0400
fix for setting RL_STATE_EOF in callback mode
That commit also includes some updates to the readline documentation
and tests that I have not included in this commit.
With this commit in place the unexpected 'quit' messages are resolved.
This commit is a partial back-port of this upstream readline commit:
commit 002d31aa5f5929eb32d0e0e2e8b8d35d99e59961
Author: Chet Ramey <chet.ramey@case.edu>
Date: Thu Mar 3 11:11:47 2022 -0500
add rl_eof_found to public API; fix pointer aliasing problems \
with history-search-backward; fix a display problem with \
runs of invisible characters at the end of a physical \
screen line
I have only pulled in the parts of this commit that relate to the new
rl_eof_found global, and the RL_STATE_EOF state flag. These changes
are needed in order to fix PR cli/28833, and are discussed in this
thread to the bug-readline mailing list:
https://lists.gnu.org/archive/html/bug-readline/2022-02/msg00021.html
The above commit is not yet in any official readline release, but my
hope is that now it has been merged into the readline tree it should
be safe enough to back port this fix to GDB's tree.
At some point in the future we will inevitably want to roll forward
the version of readline that we maintain in the binutils-gdb
repository. When that day comes the changes in this commit can be
replaced with the latest upstream readline code, as I have not changed
the meaning of this code at all from what is in upstream readline.
This commit alone does not fix the PR cli/28833 issue, for that see
the next commit, which changes GDB itself.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28833
Complement commit ae52f4830604 ("Add MIPS r3 and r5 support.") and get
changes for config.sub to recognize MIPS CPU patterns for the R3 and R5
ISA levels, used by GAS to set defaults in gas/configure.ac. Oddly, R6
ISA support has been correctly added already.
/
* config.guess: Import from upstream.
* config.sub: Likewise.
readline/
* readline/support/config.guess: Import from upstream.
* readline/support/config.sub: Likewise.
The mingw build fails with Readline 8.1, because sigprocmask is called
unconditionally. This patch adds the missing check for
HAVE_POSIX_SIGNALS.
I reported this upstream here:
https://lists.gnu.org/archive/html/bug-readline/2021-01/msg00011.html
readline/ChangeLog
2021-03-02 Tom Tromey <tom@tromey.com>
* readline/signals.c (_rl_handle_signal): Add missing check for
HAVE_POSIX_SIGNALS.
This imports readline 8.1. I did this via various hackery in a
readline git repository to make a version of readline identical to
gdb's, then did a git merge.
readline/ChangeLog
2021-03-02 Tom Tromey <tom@tromey.com>
* Import readline 8.1.
A while back, Eli sent a patch to readline that was incorporated by
upstream readline in a slightly different form. To cut down on
divergences between GDB and upstream readline, I am checking in this
patch to use the readline code.
readline/readline/ChangeLog.gdb
2021-01-23 Tom Tromey <tom@tromey.com>
* input.c [_WIN32]: Use code from upstream readline.
readline/ChangeLog
2019-12-23 Eli Zaretskii <eliz@gnu.org>
* posixstat.h (S_IRGRP, S_IWGRP, S_IXGRP, S_IROTH, S_IWOTH)
(S_IXOTH, S_IRWXG, S_IRWXO): Define if undefined, even if S_IRWXU
is defined, because non-Posix systems may defined only the user
bits.
readline turns out to be a bit of a stumbling block for the project to
move gdbsupport (and then gdbserver) to the top-level.
The issue is that readline headers are intended to be included with
names like "readline/readline.h". To support this, gdb effectively
adds a -I option pointing to the top-level source directory -- but,
importantly, this option is not used when the system readline is used.
For gdbsupport, a -I option like this would always be needed, but that
in turn would break the system readline case. This was PR build/17077,
fixed in commit a8a5dbcab8df0b3a9e04745d4fe8d64740acb323.
Previously, we had discussed this on the gdb-patches list in terms of
removing readline from the tree
https://sourceware.org/ml/gdb-patches/2019-09/msg00317.html
However, Eli expressed some concerns, and Joel did as well (off-list).
Given those concerns, and the fact that a patch-free local readline is
relatively new in gdb (it was locally patched for years), I changed my
mind and decided to handle this situation by moving the readline
sources down a level.
That is, upstream readline is now in readline/readline, and the
top-level readline directory just contains the minimal configury
needed to build that.
This fixes the problem because, when gdb unconditionally adds a
-I$(top_srcdir), this will not find readline headers. A separate -I
will be needed instead, which is exactly what's needed for
--with-system-readline.
gdb/ChangeLog
2019-10-23 Tom Tromey <tom@tromey.com>
* Makefile.in (READLINE_DIR): Update.
gdb/doc/ChangeLog
2019-10-23 Tom Tromey <tom@tromey.com>
* Makefile.in (READLINE_DIR): Update.
readline/ChangeLog
2019-10-23 Tom Tromey <tom@tromey.com>
Move old contents to readline/ subdirectory.
* aclocal.m4, configure, configure.ac, .gitignore, Makefile.am,
Makefile.in, README: New files.
Change-Id: Ice156a2ee09ea68722b48f64d97146d7428ea9e4
