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git.ipfire.org Git - thirdparty/binutils-gdb.git/log
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Sergio Durigan Junior [Mon, 9 Mar 2020 22:47:47 +0000 (18:47 -0400)]
Fix printf of a convenience variable holding an inferior address
Back at:
commit
1f6f6e21fa86dc3411a6498608f32e9eb24b7851
Author: Philippe Waroquiers <philippe.waroquiers@skynet.be>
Date: Mon Jun 10 21:41:51 2019 +0200
Ensure GDB printf command can print convenience var strings without a target.
GDB was extended in order to allow the printing of convenience
variables that are strings without a target. However, this introduced
a regression that hasn't been caught by our testsuite (because there
were no tests for it).
The problem happens when we try to print a convenience variable that
holds the address of a string in the inferior. The following
two-liners can reproduce the issue:
$ echo -e 'int main(){const char a[]="test";return 0;}' | gcc -x c - -O0-g3
$ ./gdb/gdb --data-directory ./gdb/data-directory -q ./a.out -ex 'start' -ex 'set $x = (const char *) (&a[0] + 2)' -ex 'printf "%s\n", $x'
After some investigation, I found that the problem happens on
printcmd.c:printf_c_string. In the case above, we're taking the first
branch of the 'if' condition, which assumes that there will be a value
to be printed at "value_contents (value)". There isn't. We actually
need to obtain the address that the variable points to, and read the
contents from memory.
It seems to me that we should avoid this branch if the TYPE_CODE of
"value_type (value)" is TYPE_CODE_PTR (i.e., a pointer to the
inferior's memory). This is what this patch does.
I took the liberty to extend the current testcase under
gdb.base/printcmds.exp and create a test that exercises this scenario.
No regressions have been found on Buildbot.
gdb/ChangeLog:
2020-03-03 Sergio Durigan Junior <sergiodj@redhat.com>
PR gdb/25650
* printcmd.c (print_c_string): Check also for TYPE_CODE_PTR
when verifying if dealing with a convenience variable.
gdb/testsuite/ChangeLog:
2020-03-03 Sergio Durigan Junior <sergiodj@redhat.com>
PR gdb/25650
* gdb.base/printcmds.exp: Add test to verify printf of a
variable holding an address.
GDB Administrator [Sat, 7 Mar 2020 00:01:18 +0000 (00:01 +0000)]
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Eli Zaretskii [Sat, 22 Feb 2020 20:10:29 +0000 (22:10 +0200)]
Fix resizing of GDB TUI windows via 'winheight'.
gdb/ChangeLog:
2020-02-22 Eli Zaretskii <eliz@gnu.org>
PRE gdb/25586:
* tui/tui-win.c (new_height_ok, tui_adjust_win_heights): Rename
'locator' to 'status_line', to better match terminology in the
manual.
(tui_adjust_win_heights): Resize the status_line window to match
the new dimensions of the command and source/disassembly windows.
Reported by Aleksey Midenkov <midenok@gmail.com>.
GDB Administrator [Sat, 22 Feb 2020 00:01:04 +0000 (00:01 +0000)]
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GDB Administrator [Sun, 9 Feb 2020 00:02:07 +0000 (00:02 +0000)]
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Joel Brobecker [Sat, 8 Feb 2020 13:14:10 +0000 (17:14 +0400)]
Bump GDB version number to 9.1.90.DATE-git.
gdb/ChangeLog:
* version.in: Set GDB version number to 9.1.90.DATE-git.
Joel Brobecker [Sat, 8 Feb 2020 13:02:09 +0000 (17:02 +0400)]
Document the GDB 9.1 release in gdb/ChangeLog
gdb/ChangeLog:
GDB 9.1 released.
Joel Brobecker [Sat, 8 Feb 2020 12:50:15 +0000 (16:50 +0400)]
Set GDB version number to 9.1.
gdb/ChangeLog:
* version.in: Set GDB version number to 9.1.
GDB Administrator [Sat, 8 Feb 2020 00:01:33 +0000 (00:01 +0000)]
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Iain Buclaw [Wed, 5 Feb 2020 11:45:13 +0000 (12:45 +0100)]
Make fputs_unfiltered use fputs_maybe_filtered
This patch redefines fputs_unfiltered in utils.c, with new behavior to
forward parameters to fputs_maybe_filtered. This makes
fputs_unfiltered identical to fputs_filtered, except filtering is
disabled.
Some callers of fputs_unfiltered have been updated to use ui_file_puts
where they were using other ui_file_* functions anyway for IO.
This fixes the problem I saw with \032\032post-prompt annotation being
flushed to stdout in the wrong order.
gdb/ChangeLog
2020-02-05 Iain Buclaw <ibuclaw@gdcproject.org>
PR gdb/25190:
* gdb/remote-sim.c (gdb_os_write_stderr): Update.
* gdb/remote.c (remote_console_output): Update.
* gdb/ui-file.c (fputs_unfiltered): Rename to...
(ui_file_puts): ...this.
* gdb/ui-file.h (ui_file_puts): Add declaration.
* gdb/utils.c (emit_style_escape): Update.
(flush_wrap_buffer): Update.
(fputs_maybe_filtered): Update.
(fputs_unfiltered): Add function.
Change-Id: I17ed5078f71208344f2f8ab634a6518b1af6e213
Iain Buclaw [Wed, 5 Feb 2020 11:25:09 +0000 (12:25 +0100)]
Make gdb_flush also flush the wrap buffer
This changes gdb_flush to also flush the internal wrap buffer. A few
places needed to continue using the previous approach, so this also
introduces ui_file_flush for those.
gdb/ChangeLog
2020-02-05 Iain Buclaw <ibuclaw@gdcproject.org>
* gdb/event-loop.c (gdb_wait_for_event): Update.
* gdb/printcmd.c (printf_command): Update.
* gdb/remote-fileio.c (remote_fileio_func_write): Update.
* gdb/remote-sim.c (gdb_os_flush_stdout): Update.
(gdb_os_flush_stderr): Update.
* gdb/remote.c (remote_console_output): Update.
* gdb/ui-file.c (gdb_flush): Rename to...
(ui_file_flush): ...this.
(stderr_file::write): Update.
(stderr_file::puts): Update.
* gdb/ui-file.h (gdb_flush): Rename to...
(ui_file_flush): ...this.
* gdb/utils.c (gdb_flush): Add function.
* gdb/utils.h (gdb_flush): Add declaration.
Change-Id: I7ca143d30f03dc39f218f6e880eb9bca9e15af39
Tom Tromey [Wed, 5 Feb 2020 09:53:44 +0000 (10:53 +0100)]
Revert basenames_may_differ patch
Commit
a0c1ffedc regressed certain cases coming from Eclipse.
See PR breakpoints/24915.
This patch reverts the commit for the gdb 9 release.
gdb/ChangeLog
2020-02-07 Tom Tromey <tromey@adacore.com>
PR breakpoints/24915:
* source.c (find_and_open_source): Do not check basenames_may_differ.
gdb/testsuite/ChangeLog
2020-02-07 Tom Tromey <tromey@adacore.com>
PR breakpoints/24915:
* gdb.base/annotate-symlink.exp: Use setup_xfail.
Change-Id: Iadbf42f35eb40c95ad32b2108ae25d8f199998bd
GDB Administrator [Fri, 7 Feb 2020 00:01:51 +0000 (00:01 +0000)]
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