From: Andrew Burgess <aburgess@redhat.com>
To: Tom Tromey <tom@tromey.com>
Cc: gdb-patches@sourceware.org
Subject: Re: [PATCH 01/18] Fix latent quote char bug in generic_printstr
Date: Wed, 16 Feb 2022 15:38:57 +0000 [thread overview]
Message-ID: <20220216153857.GE2571@redhat.com> (raw)
In-Reply-To: <20220216135518.3162480-2-tom@tromey.com>
* Tom Tromey <tom@tromey.com> [2022-02-16 06:55:01 -0700]:
> 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, though I'm
> not sure how to test it -- I don't know Fortran and in my experiment I
> was unable to make a zero-length Fortran string.
This change looks good to me. Below is a test case which you are
welcome to include with this patch.
Thanks,
Andrew
---
commit 3ede663e51ebeaef24280891ea8dced86571e9e7
Author: Andrew Burgess <aburgess@redhat.com>
Date: Wed Feb 16 15:37:15 2022 +0000
A test
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
next prev parent reply other threads:[~2022-02-16 15:39 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-16 13:55 [PATCH 00/18] Refactor character printing Tom Tromey
2022-02-16 13:55 ` [PATCH 01/18] Fix latent quote char bug in generic_printstr Tom Tromey
2022-02-16 15:38 ` Andrew Burgess [this message]
2022-02-16 13:55 ` [PATCH 02/18] Boolify need_escape in generic_emit_char Tom Tromey
2022-02-16 15:39 ` Andrew Burgess
2022-02-16 13:55 ` [PATCH 03/18] Remove c_emit_char Tom Tromey
2022-02-16 15:40 ` Andrew Burgess
2022-02-16 13:55 ` [PATCH 04/18] Remove c_printstr Tom Tromey
2022-02-16 15:46 ` Andrew Burgess
2022-02-16 13:55 ` [PATCH 05/18] Don't use wchar_printable in print_wchar Tom Tromey
2022-02-16 15:52 ` Andrew Burgess
2022-02-16 13:55 ` [PATCH 06/18] Fix a latent bug " Tom Tromey
2022-02-16 16:02 ` Andrew Burgess
2022-02-17 22:02 ` Tom Tromey
2022-02-16 13:55 ` [PATCH 07/18] Remove language_defn::emitchar Tom Tromey
2022-02-16 16:12 ` Andrew Burgess
2022-02-17 22:02 ` Tom Tromey
2022-02-16 13:55 ` [PATCH 08/18] Add gdb_iswcntrl Tom Tromey
2022-02-16 16:13 ` Andrew Burgess
2022-02-16 13:55 ` [PATCH 09/18] Include \0 in printable wide characters Tom Tromey
2022-02-16 17:19 ` Andrew Burgess
2022-02-16 13:55 ` [PATCH 10/18] Use a ui_file in print_wchar Tom Tromey
2022-02-16 17:25 ` Andrew Burgess
2022-02-16 13:55 ` [PATCH 11/18] Add an emitter callback to generic_printstr and generic_emit_char Tom Tromey
2022-02-16 17:47 ` Andrew Burgess
2022-02-16 20:40 ` Tom Tromey
2022-02-16 21:00 ` Tom Tromey
2022-02-16 13:55 ` [PATCH 12/18] Add a default encoding to generic_emit_char and generic_printstr Tom Tromey
2022-02-16 13:55 ` [PATCH 13/18] Change generic_emit_char to print the quotes Tom Tromey
2022-02-16 13:55 ` [PATCH 14/18] Use generic_emit_char in Rust Tom Tromey
2022-02-16 13:55 ` [PATCH 15/18] Use generic_emit_char in Ada Tom Tromey
2022-02-16 13:55 ` [PATCH 16/18] Use generic_emit_char in Modula-2 Tom Tromey
2022-02-16 13:55 ` [PATCH 17/18] Use generic_emit_char in Pascal Tom Tromey
2022-02-16 13:55 ` [PATCH 18/18] Simplify Fortran string printing Tom Tromey
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