From FEDORA_PATCHES Mon Sep 17 00:00:00 2001

From: Kevin Buettner <kevinb@redhat.com>

Date: Wed, 10 Nov 2021 18:55:43 -0700

Subject: gdb-rhbz2022177-dprintf-2.patch

;; Backport test case for dprintf bug (RH BZ 2022177).

Test case for Bug 28308

The purpose of this test is described in the comments in

dprintf-execution-x-script.exp.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28308

The name of this new test was based on that of an existing test,

bp-cmds-execution-x-script.exp.  I started off by copying that test,

adding to it, and then rewriting almost all of it.  It's different

enough that I decided that listing the copyright year as 2021

was sufficient.

diff --git a/gdb/testsuite/gdb.base/dprintf-execution-x-script.c b/gdb/testsuite/gdb.base/dprintf-execution-x-script.c

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.base/dprintf-execution-x-script.c

@@ -0,0 +1,53 @@

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

+

+   Copyright 2021 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/>.  */

+

+#include <stdlib.h>

+#include <stdio.h>

+

+volatile int vi = 0;

+

+void

+inc_vi ()

+{

+  vi++;

+}

+

+void

+print_vi ()

+{

+  printf ("vi=%d\n", vi);

+}

+

+void

+increment ()

+{

+  inc_vi ();

+}

+

+int

+main (int argc, char **argv)

+{

+  print_vi ();

+  increment ();

+  print_vi ();

+  increment ();

+  print_vi ();

+  increment ();

+  print_vi ();

+

+  exit (0);

+}

diff --git a/gdb/testsuite/gdb.base/dprintf-execution-x-script.exp b/gdb/testsuite/gdb.base/dprintf-execution-x-script.exp

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.base/dprintf-execution-x-script.exp

@@ -0,0 +1,85 @@

+# Copyright 2021 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 that commands in a GDB script file run via GDB's -x flag work

+# as expected.  Specifically, the script creates a dprintf breakpoint

+# as well as a normal breakpoint that has "continue" in its command

+# list, and then does "run".  Correct output from GDB is checked as

+# part of this test.

+

+# Bail out if the target can't use the 'run' command.

+if ![target_can_use_run_cmd] {

+    return 0

+}

+

+standard_testfile

+

+if {[build_executable "failed to prepare" $testfile $srcfile debug]} {

+    return -1

+}

+

+# This is the name of the GDB script to load.

+set x_file ${srcdir}/${subdir}/$testfile.gdb

+

+# Create context in which the global, GDBFLAGS, will be restored at

+# the end of the block.  All commands run within the block are

+# actually run in the outer context.  (This is why 'res' is available

+# outside of the save_vars block.)

+save_vars { GDBFLAGS } {

+    # Set flags with which to start GDB.

+    append GDBFLAGS " -ex \"set height unlimited\""

+    append GDBFLAGS " -x \"$x_file\""

+    append GDBFLAGS " --args \"$binfile\""

+

+    # Start GDB with above flags.

+    set res [gdb_spawn]

+}

+

+set test "load and run script with -x"

+if { $res != 0} {

+    fail $test

+    return -1

+}

+

+# The script loaded via -x contains a run command; while running, GDB

+# is expected to print three messages from dprintf breakpoints along

+# with three interspersed messages from an ordinary breakpoint (which

+# was set up with a continue command).  Set up pattern D to match

+# output from hitting the dprintf breakpoint and B for the ordinary

+# breakpoint.  Then set PAT to contain the entire pattern of expected

+# output from the interspersed dprintf and ordinary breakpoints along

+# with some (additional) expected output from the dprintf breakpoints,

+# i.e. 0, 1, and 2.

+set d "dprintf in increment.., vi="

+set b "Breakpoint ., inc_vi"

+set pat "${d}0.*?$b.*?${d}1.*?$b.*?${d}2.*?$b.*?"

+

+proc do_test {cmd test} {

+    gdb_test $cmd "$::pat$::inferior_exited_re normally.*" $test

+}

+

+# Check output from running script with -x

+do_test "" $test

+

+# Restart GDB and 'source' the script; this will (still) run the program

+# due to the 'run' command in the script.

+clean_restart $binfile

+do_test "source $x_file" "load and run script using source command"

+

+# This should leave us at the gdb prompt; Run program again using

+# already established breakpoints, i.e. those loaded from the

+# script.  Prior to fixing PR 28308, this was the only test that

+# would pass.

+do_test "run" "run again"

diff --git a/gdb/testsuite/gdb.base/dprintf-execution-x-script.gdb b/gdb/testsuite/gdb.base/dprintf-execution-x-script.gdb

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.base/dprintf-execution-x-script.gdb

@@ -0,0 +1,21 @@

+# Copyright 2021 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/>.  */

+

+dprintf increment, "dprintf in increment(), vi=%d\n", vi

+break inc_vi

+commands

+  continue

+end

+run