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Fix latent bug in tui_copy_source_line

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tui_copy_source_line has a bug, where it can advance past the
terminating \0 in its input string.  This patch fixes the bug and adds
a test case for this function.

gdb/ChangeLog
2019-12-01  Tom Tromey  <tom@tromey.com>

	* tui/tui-winsource.c (tui_copy_source_line): Don't advance past
	\0.
	* unittests/tui-selftests.c: New file.
	* Makefile.in (SUBDIR_UNITTESTS_SRCS): Add tui-selftests.c.

Change-Id: I46cdabe6e57549983149b8f640cda5edd16fa260
This commit is contained in:
Tom Tromey 2019-11-17 15:50:31 -07:00
parent 484c9b643c
commit 517d261dfa
4 changed files with 58 additions and 0 deletions
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7
gdb/ChangeLog
View File

@ -1,3 +1,10 @@
2019-12-01 Tom Tromey <tom@tromey.com>
* tui/tui-winsource.c (tui_copy_source_line): Don't advance past
\0.
* unittests/tui-selftests.c: New file.
* Makefile.in (SUBDIR_UNITTESTS_SRCS): Add tui-selftests.c.
2019-12-01 Tom Tromey <tom@tromey.com>
* tui/tui.c (tui_enable): Call tui_update_variables earlier.

1
gdb/Makefile.in
View File

@ -442,6 +442,7 @@ SUBDIR_UNITTESTS_SRCS = \
unittests/string_view-selftests.c \
unittests/style-selftests.c \
unittests/tracepoint-selftests.c \
unittests/tui-selftests.c \
unittests/unpack-selftests.c \
unittests/utils-selftests.c \
unittests/vec-utils-selftests.c \

2
gdb/tui/tui-winsource.c
View File

@ -103,6 +103,8 @@ tui_copy_source_line (const char **ptr, int line_no, int first_col,
lineptr += skip_bytes;
continue;
}
if (c == '\0')
break;
++lineptr;
++column;

48
gdb/unittests/tui-selftests.c Normal file
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@ -0,0 +1,48 @@
/* Self tests for the TUI
Copyright (C) 2019 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbsupport/selftest.h"
#include "tui/tui-winsource.h"
namespace selftests {
namespace tui {
static void
run_tests ()
{
const char *text = "hello";
std::string result = tui_copy_source_line (&text, 0, 0, 50, 0);
SELF_CHECK (result == "hello");
SELF_CHECK (*text == '\0');
text = "hello\n";
result = tui_copy_source_line (&text, 0, 0, 3, 0);
SELF_CHECK (result == "hel");
SELF_CHECK (*text == '\0');
}
} /* namespace tui*/
} /* namespace selftests */
void
_initialize_tui_selftest ()
{
selftests::register_test ("tui", selftests::tui::run_tests);
}