From: Tom Tromey <tom@tromey.com>
To: gdb-patches@sourceware.org
Cc: Tom Tromey <tom@tromey.com>, Andrew Burgess <aburgess@redhat.com>
Subject: [PATCH v2 01/18] Fix latent quote char bug in generic_printstr
Date: Thu, 17 Feb 2022 15:05:29 -0700 [thread overview]
Message-ID: <20220217220547.3874030-2-tom@tromey.com> (raw)
In-Reply-To: <20220217220547.3874030-1-tom@tromey.com>
generic_printstr prints an empty string like:
fputs_filtered ("\"\"", stream);
However, this seems wrong to me if the quote character is something
other than double quote. This patch fixes this latent bug. Thanks to
Andrew for the test case.
Co-authored-by: Andrew Burgess <aburgess@redhat.com>
---
gdb/testsuite/gdb.fortran/empty-string.exp | 33 ++++++++++++++++++++++
gdb/testsuite/gdb.fortran/empty-string.f90 | 30 ++++++++++++++++++++
gdb/valprint.c | 2 +-
3 files changed, 64 insertions(+), 1 deletion(-)
create mode 100644 gdb/testsuite/gdb.fortran/empty-string.exp
create mode 100644 gdb/testsuite/gdb.fortran/empty-string.f90
diff --git a/gdb/testsuite/gdb.fortran/empty-string.exp b/gdb/testsuite/gdb.fortran/empty-string.exp
new file mode 100644
index 00000000000..892f189784a
--- /dev/null
+++ b/gdb/testsuite/gdb.fortran/empty-string.exp
@@ -0,0 +1,33 @@
+# Copyright 2022 Free Software Foundation, Inc.
+
+# 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/> .
+
+# Test printing of an empty Fortran string.
+
+if {[skip_fortran_tests]} { return -1 }
+
+standard_testfile ".f90"
+load_lib fortran.exp
+
+if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug f90}]} {
+ return -1
+}
+
+if ![fortran_runto_main] {
+ return -1
+}
+
+gdb_breakpoint [gdb_get_line_number "Break here"]
+gdb_continue_to_breakpoint "run to test location"
+gdb_test "print string" " = ''"
diff --git a/gdb/testsuite/gdb.fortran/empty-string.f90 b/gdb/testsuite/gdb.fortran/empty-string.f90
new file mode 100644
index 00000000000..574ed7fb7aa
--- /dev/null
+++ b/gdb/testsuite/gdb.fortran/empty-string.f90
@@ -0,0 +1,30 @@
+! Copyright 2022 Free Software Foundation, Inc.
+!
+! 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/>.
+
+program empty_string
+ implicit none
+
+ integer :: ret
+
+ ret = string_length('')
+
+contains
+
+ integer(kind=4) function string_length(string)
+ character*(*) :: string
+ string_length = len(string) ! Break here.
+ end function string_length
+
+end program empty_string
diff --git a/gdb/valprint.c b/gdb/valprint.c
index d6ec64845f4..e4d68381189 100644
--- a/gdb/valprint.c
+++ b/gdb/valprint.c
@@ -2632,7 +2632,7 @@ generic_printstr (struct ui_file *stream, struct type *type,
if (length == 0)
{
- fputs_filtered ("\"\"", stream);
+ fprintf_filtered (stream, "%c%c", quote_char, quote_char);
return;
}
--
2.31.1
next prev parent reply other threads:[~2022-02-17 22:05 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-17 22:05 [PATCH v2 00/18] Refactor character printing Tom Tromey
2022-02-17 22:05 ` Tom Tromey [this message]
2022-02-17 22:05 ` [PATCH v2 02/18] Boolify need_escape in generic_emit_char Tom Tromey
2022-02-17 22:05 ` [PATCH v2 03/18] Remove c_emit_char Tom Tromey
2022-02-17 22:05 ` [PATCH v2 04/18] Remove c_printstr Tom Tromey
2022-02-17 22:05 ` [PATCH v2 05/18] Don't use wchar_printable in print_wchar Tom Tromey
2022-02-22 15:36 ` Andrew Burgess
2022-10-10 16:39 ` Tom Tromey
2022-02-17 22:05 ` [PATCH v2 06/18] Fix a latent bug " Tom Tromey
2022-02-17 22:05 ` [PATCH v2 07/18] Remove language_defn::emitchar Tom Tromey
2022-02-17 22:05 ` [PATCH v2 08/18] Add gdb_iswcntrl Tom Tromey
2022-02-17 22:05 ` [PATCH v2 09/18] Include \0 in printable wide characters Tom Tromey
2022-02-23 13:49 ` Andrew Burgess
2022-02-23 22:28 ` Tom Tromey
2022-02-23 23:59 ` Tom Tromey
2022-02-17 22:05 ` [PATCH v2 10/18] Use a ui_file in print_wchar Tom Tromey
2022-02-17 22:05 ` [PATCH v2 11/18] Add an emitter callback to generic_printstr and generic_emit_char Tom Tromey
2022-02-17 22:05 ` [PATCH v2 12/18] Add a default encoding to generic_emit_char and generic_printstr Tom Tromey
2022-02-17 22:05 ` [PATCH v2 13/18] Change generic_emit_char to print the quotes Tom Tromey
2022-02-17 22:05 ` [PATCH v2 14/18] Use generic_emit_char in Rust Tom Tromey
2022-02-17 22:05 ` [PATCH v2 15/18] Use generic_emit_char in Ada Tom Tromey
2022-02-17 22:05 ` [PATCH v2 16/18] Use generic_emit_char in Modula-2 Tom Tromey
2022-02-23 20:17 ` Gaius Mulley
2022-03-16 12:29 ` [PATCH] Additional modula2 tests Gaius Mulley
2022-04-07 14:21 ` Tom Tromey
2022-04-09 23:16 ` Gaius Mulley
2022-04-11 19:45 ` [PATCH v1] Array access in Modula-2 Gaius Mulley
2022-02-17 22:05 ` [PATCH v2 17/18] Use generic_emit_char in Pascal Tom Tromey
2022-02-17 22:05 ` [PATCH v2 18/18] Simplify Fortran string printing Tom Tromey
2022-10-10 17:37 ` [PATCH v2 00/18] Refactor character printing Tom Tromey
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