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From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
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From: Fedora GDB patches <invalid@email.com>
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Date: Fri, 27 Oct 2017 21:07:50 +0200
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Subject: gdb-6.3-attach-see-vdso-test.patch
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;; Test kernel VDSO decoding while attaching to an i386 process.
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;;=fedoratest
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diff --git a/gdb/testsuite/gdb.base/attach-see-vdso.c b/gdb/testsuite/gdb.base/attach-see-vdso.c
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new file mode 100644
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--- /dev/null
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+++ b/gdb/testsuite/gdb.base/attach-see-vdso.c
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@@ -0,0 +1,25 @@
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+/* This testcase is part of GDB, the GNU debugger.
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+
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+ Copyright 2007 Free Software Foundation, Inc.
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 2 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program; if not, write to the Free Software
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+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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+
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+#include <unistd.h>
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+
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+int main ()
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+{
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+ pause ();
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+ return 1;
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+}
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diff --git a/gdb/testsuite/gdb.base/attach-see-vdso.exp b/gdb/testsuite/gdb.base/attach-see-vdso.exp
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new file mode 100644
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--- /dev/null
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+++ b/gdb/testsuite/gdb.base/attach-see-vdso.exp
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@@ -0,0 +1,77 @@
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+# Copyright 2007
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+
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+# This program is free software; you can redistribute it and/or modify
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+# it under the terms of the GNU General Public License as published by
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+# the Free Software Foundation; either version 2 of the License, or
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+# (at your option) any later version.
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+#
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+# This program is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+# GNU General Public License for more details.
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+#
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+# You should have received a copy of the GNU General Public License
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+# along with this program; if not, write to the Free Software
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+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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+
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+# This file was created by Jan Kratochvil <jan.kratochvil@redhat.com>.
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+
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+# This test only works on Linux
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+if { ![istarget "*-*-linux-gnu*"] } {
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+ return 0
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+}
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+
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+if {[use_gdb_stub]} {
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+ untested "skipping test because of use_gdb_stub"
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+ return -1
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+}
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+
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+set testfile "attach-see-vdso"
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+set srcfile ${testfile}.c
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+set binfile [standard_output_file ${testfile}]
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+set escapedbinfile [string_to_regexp [standard_output_file ${testfile}]]
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+
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+# The kernel VDSO is used for the syscalls returns only on i386 (not x86_64).
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+#
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+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug additional_flags=-m32}] != "" } {
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+ gdb_suppress_entire_file "Testcase nonthraded compile failed, so all tests in this file will automatically fail."
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+}
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+
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+if [get_compiler_info ${binfile}] {
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+ return -1
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+}
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+
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+# Start the program running and then wait for a bit, to be sure
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+# that it can be attached to.
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+
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+set testpid [eval exec $binfile &]
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+
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+# Avoid some race:
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+sleep 2
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+
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+# Start with clean gdb
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+gdb_exit
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+gdb_start
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+gdb_reinitialize_dir $srcdir/$subdir
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+# Never call: gdb_load ${binfile}
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+# as the former problem would not reproduce otherwise.
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+
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+set test "attach"
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+gdb_test_multiple "attach $testpid" "$test" {
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+ -re "Attaching to process $testpid\r?\n.*$gdb_prompt $" {
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+ pass "$test"
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+ }
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+}
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+
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+gdb_test "bt" "#0 *0x\[0-9a-f\]* in \[^?\].*" "backtrace decodes VDSO"
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+
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+# Exit and detach the process.
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+
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+gdb_exit
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+
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+# Make sure we don't leave a process around to confuse
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+# the next test run (and prevent the compile by keeping
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+# the text file busy), in case the "set should_exit" didn't
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+# work.
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+
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+remote_exec build "kill -9 ${testpid}"
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