From FEDORA_PATCHES Mon Sep 17 00:00:00 2001

From: Fedora GDB patches <invalid@email.com>

Date: Fri, 27 Oct 2017 21:07:50 +0200

Subject: gdb-6.3-attach-see-vdso-test.patch

;; Test kernel VDSO decoding while attaching to an i386 process.

;;=fedoratest

diff --git a/gdb/testsuite/gdb.base/attach-see-vdso.c b/gdb/testsuite/gdb.base/attach-see-vdso.c

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.base/attach-see-vdso.c

@@ -0,0 +1,25 @@

+/* This testcase is part of GDB, the GNU debugger.

+

+   Copyright 2007 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 2 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, write to the Free Software

+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */

+

+#include <unistd.h>

+

+int main ()

+{

+  pause ();

+  return 1;

+}

diff --git a/gdb/testsuite/gdb.base/attach-see-vdso.exp b/gdb/testsuite/gdb.base/attach-see-vdso.exp

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.base/attach-see-vdso.exp

@@ -0,0 +1,77 @@

+# Copyright 2007

+

+# 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 2 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, write to the Free Software

+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

+

+# This file was created by Jan Kratochvil <jan.kratochvil@redhat.com>.

+

+# This test only works on Linux

+if { ![istarget "*-*-linux-gnu*"] } {

+    return 0

+}

+

+if {[use_gdb_stub]} {

+    untested "skipping test because of use_gdb_stub"

+    return -1

+}

+

+set testfile "attach-see-vdso"

+set srcfile  ${testfile}.c

+set binfile  [standard_output_file ${testfile}]

+set escapedbinfile  [string_to_regexp [standard_output_file ${testfile}]]

+

+# The kernel VDSO is used for the syscalls returns only on i386 (not x86_64).

+#

+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug additional_flags=-m32}] != "" } {

+    gdb_suppress_entire_file "Testcase nonthraded compile failed, so all tests in this file will automatically fail."

+}

+

+if [get_compiler_info ${binfile}] {

+    return -1

+}

+

+# Start the program running and then wait for a bit, to be sure

+# that it can be attached to.

+

+set testpid [eval exec $binfile &]

+

+# Avoid some race:

+sleep 2

+

+# Start with clean gdb

+gdb_exit

+gdb_start

+gdb_reinitialize_dir $srcdir/$subdir

+# Never call: gdb_load ${binfile}

+# as the former problem would not reproduce otherwise.

+

+set test "attach"

+gdb_test_multiple "attach $testpid" "$test" {

+    -re "Attaching to process $testpid\r?\n.*$gdb_prompt $" {

+	pass "$test"

+    }

+}

+

+gdb_test "bt" "#0 *0x\[0-9a-f\]* in \[^?\].*" "backtrace decodes VDSO"

+

+# Exit and detach the process.

+

+gdb_exit

+

+# Make sure we don't leave a process around to confuse

+# the next test run (and prevent the compile by keeping

+# the text file busy), in case the "set should_exit" didn't

+# work.

+

+remote_exec build "kill -9 ${testpid}"