Add test for load command

There doesn't seem to by any test for the load command.  I suggest to
add this test, so that we can have a minimum of confidence we don't
break it completely while refactoring the code that implements it.

gdb/testsuite/ChangeLog:

	* gdb.base/load-command.c: New file.
	* gdb.base/load-command.exp: New file.
	* lib/gdb.exp (gdb_is_target_remote_prompt): Rename to...
	(gdb_is_target_1): ...this, and generalize for other targets
	than just remote.
	(gdb_is_target_remote): Use gdb_is_target_1.
	(gdb_is_target_native): use gdb_is_target_1.

2 files changed, 71 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.base/load-command.c b/gdb/testsuite/gdb.base/load-command.c
new file mode 100644
index 0000000..ee73e2b
--- /dev/null
+++ b/gdb/testsuite/gdb.base/load-command.c
@@ -0,0 +1,22 @@
+/* This test program is part of GDB, the GNU debugger.
+
+   Copyright 2018 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/>.  */
+
+int the_variable = 0x1234;
+
+int main ()
+{
+}
diff --git a/gdb/testsuite/gdb.base/load-command.exp b/gdb/testsuite/gdb.base/load-command.exp
new file mode 100644
index 0000000..61ca272
--- /dev/null
+++ b/gdb/testsuite/gdb.base/load-command.exp
@@ -0,0 +1,49 @@
+# Copyright 2018 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 the "load" command.
+
+standard_testfile
+
+# Disable generation of position independent executable (PIE).  Otherwise, we
+# would have to manually specify an offset to load.
+
+set opts {debug ldflags=-no-pie}
+
+if [prepare_for_testing "failed to prepare" $testfile $srcfile $opts] {
+    return -1
+}
+
+if ![runto_main] {
+    fail "can't run to main"
+    return -1
+}
+
+# The native target does not support the load command.
+if [gdb_is_target_native] {
+    unsupported "the native target does not support the load command"
+    return
+}
+
+# Manually change the value of the_variable.
+gdb_test "print/x the_variable" " = 0x1234" "check initial value of the_variable"
+gdb_test_no_output "set the_variable = 0x5555" "manually change the_variable"
+gdb_test "print/x the_variable" " = 0x5555" "check manually changed value of the_variable"
+
+# Re-load the binary using the load command.
+gdb_test "load ${binfile}" ".*Loading section .data.*Transfer rate:.*" "re-load binary"
+
+# Re-loading the binary should have reset the variable value.
+gdb_test "print/x the_variable" " = 0x1234" "check initial value of the_variable"