Testsuite: Add gdbserver sysroot test

The local board file ensures that the sysroot is always set to load
files from the local filesystem.

Add a gdbserver test to explicitly test the sysroot set to both the
remote target and the local filesystem.

gdb/testsuite/ChangeLog:

	* gdb.server/sysroot.c: New test.
	* gdb.server/sysroot.exp: New file.
	* lib/gdbserver-support.exp (gdb_target_cmd): Add additional text
        matching param.

gdb/testsuite/ChangeLog

@@ -1,3 +1,10 @@
+2019-04-11  Alan Hayward  <alan.hayward@arm.com>
+
+	* gdb.server/sysroot.c: New test.
+	* gdb.server/sysroot.exp: New file.
+	* lib/gdbserver-support.exp (gdb_target_cmd): Add additional text
+	matching param.
+
 2019-04-11  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* gdb.base/align.exp: Extend test to cover structures containing

gdb/testsuite/gdb.server/sysroot.c

@@ -0,0 +1,25 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2019 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 <stdio.h>
+
+int
+main ()
+{
+  printf ("Hello World!\n");
+  return 0;
+}

gdb/testsuite/gdb.server/sysroot.exp

@@ -0,0 +1,77 @@
+# This testcase is part of GDB, the GNU debugger.
+#
+# Copyright 2019 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 GDB can correctly read the binary and shared libraries
+# with different sysroot setups: local and "target:".
+
+load_lib gdbserver-support.exp
+
+if { [skip_gdbserver_tests] } {
+    verbose "skipping gdbserver tests"
+    return -1
+}
+
+standard_testfile
+if {[build_executable "failed to prepare" $testfile $srcfile "additional_flags=--no-builtin"] == -1} {
+    return -1
+}
+
+# Run once with sysroot set to the local filesystem and once set to the remote
+# target.
+foreach_with_prefix sysroot { "local" "remote" } {
+    global srcdir
+    global subdir
+    global binfile
+
+    if { $sysroot == "local" } {
+	set sysroot_command "/"
+	set reading_symbols "Reading symbols from $binfile..."
+    } else {
+	set sysroot_command "target:"
+	set reading_symbols "Reading $binfile from remote target..."
+    }
+
+    # Restart GDB.
+    clean_restart
+
+    # Make sure we're disconnected, in case we're testing with an
+    # extended-remote board, therefore already connected.
+    gdb_test "disconnect" ".*"
+
+    # Start GDBserver.
+    set res [gdbserver_start "" $binfile]
+    set gdbserver_protocol [lindex $res 0]
+    set gdbserver_gdbport [lindex $res 1]
+
+    # Set the sysroot.
+    gdb_test_no_output "set sysroot $sysroot_command"
+
+    # Connect to gdbserver, making sure GDB reads in the binary correctly.
+    set test "connect to remote and read binary"
+    if {[gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport $reading_symbols] == 0} {
+	pass $test
+    } else {
+	fail $test
+    }
+
+    gdb_breakpoint main
+    gdb_test "continue" "Breakpoint $decimal.* main.*" "continue to main"
+
+    # Test that we can stop inside a library.
+    gdb_breakpoint printf
+    gdb_test "continue" "Breakpoint $decimal.* printf .*" "continue to printf"
+}

gdb/testsuite/lib/gdbserver-support.exp

@@ -42,9 +42,11 @@
 
 #
 # gdb_target_cmd
-# Send gdb the "target" command
+# Send gdb the "target" command.  Returns 0 on success, 1 on failure.
+# If specified, then ADDITIONAL_TEXT must match the text that comes after
+# the connection message in order for the procedure to succeed.
 #
-proc gdb_target_cmd { targetname serialport } {
+proc gdb_target_cmd { targetname serialport {additional_text ""} } {
     global gdb_prompt
 
     set serialport_re [string_to_regexp $serialport]
@@ -61,23 +63,23 @@ proc gdb_target_cmd { targetname serialport } {
 	    -re "Couldn't establish connection to remote.*$gdb_prompt $" {
 		verbose "Connection failed"
 	    }
-	    -re "Remote MIPS debugging.*$gdb_prompt" {
+	    -re "Remote MIPS debugging.*$additional_text.*$gdb_prompt" {
 		verbose "Set target to $targetname"
 		return 0
 	    }
-	    -re "Remote debugging using .*$serialport_re.*$gdb_prompt $" {
+	    -re "Remote debugging using .*$serialport_re.*$additional_text.*$gdb_prompt $" {
 		verbose "Set target to $targetname"
 		return 0
 	    }
-	    -re "Remote debugging using stdio.*$gdb_prompt $" {
+	    -re "Remote debugging using stdio.*$additional_text.*$gdb_prompt $" {
 		verbose "Set target to $targetname"
 		return 0
 	    }
-	    -re "Remote target $targetname connected to.*$gdb_prompt $" {
+	    -re "Remote target $targetname connected to.*$additional_text.*$gdb_prompt $" {
 		verbose "Set target to $targetname"
 		return 0
 	    }
-	    -re "Connected to.*$gdb_prompt $" { 
+	    -re "Connected to.*$additional_text.*$gdb_prompt $" {
 		verbose "Set target to $targetname"
 		return 0
 	    }