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Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31128
From https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=bc23ea51f8a83e9524dfb553baa8baacb29e68a9
From: Hannes Domani <ssbssa@yahoo.de>
Date: Fri, 8 Dec 2023 19:06:14 +0100
Subject: [PATCH] Fix printing of global variable stubs if no inferior is
running
Since 3c45e9f915ae4aeab7312d6fc55a947859057572 gdb crashes when trying
to print a global variable stub without a running inferior, because of
a missing nullptr-check (the block_scope function took care of that
check before it was converted to a method).
With this check it works again:
```
(gdb) print s
$1 = <incomplete type>
```
Bug: https://sourceware.org/PR31128
Approved-By: Tom Tromey <tom@tromey.com>
(cherry picked from commit 576745e26c0ec76a53ba45b20af464628a50b3e4)
--- a/gdb/cp-namespace.c
+++ b/gdb/cp-namespace.c
@@ -1026,7 +1026,11 @@ cp_lookup_transparent_type (const char *name)
/* If that doesn't work and we're within a namespace, look there
instead. */
- scope = get_selected_block (0)->scope ();
+ const block *block = get_selected_block (0);
+ if (block == nullptr)
+ return nullptr;
+
+ scope = block->scope ();
if (scope[0] == '\0')
return NULL;
--- /dev/null
+++ b/gdb/testsuite/gdb.cp/print-global-stub.cc
@@ -0,0 +1,31 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2023 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/>. */
+
+struct S
+{
+ S (int);
+ virtual ~S ();
+
+ int m_i;
+};
+
+S s (5);
+
+int main ()
+{
+ return 0;
+}
--- /dev/null
+++ b/gdb/testsuite/gdb.cp/print-global-stub.exp
@@ -0,0 +1,32 @@
+# Copyright (C) 2023 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/>.
+
+# This file is part of the GDB testsuite.
+# It tests printing of a global stub without inferior.
+
+require allow_cplus_tests
+
+standard_testfile .cc
+set objfile [standard_output_file ${testfile}.o]
+
+if { [gdb_compile $srcdir/$subdir/$srcfile $objfile object \
+ {c++ debug}] != "" } {
+ untested "failed to compile"
+ return -1
+}
+
+clean_restart $objfile
+
+gdb_test "print s" " = <incomplete type>"
--
2.39.3
|
