7 files changed, 110 insertions, 3 deletions
diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 017fd5d..d9675e7 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,5 +1,12 @@
 2015-08-24  Pedro Alves  <palves@redhat.com>
 
+	* inferiors.c (get_first_process): New function.
+	* inferiors.h (get_first_process): New declaration.
+	* remote-utils.c (read_ptid): Default to the first process in the
+	list, instead of to the current thread's process.
+
+2015-08-24  Pedro Alves  <palves@redhat.com>
+
 	* debug.c: Include gdb_sys_time.h instead of sys/time.h.
 	* event-loop.c: Likewise.
 	* remote-utils.c: Likewise.
diff --git a/gdb/gdbserver/inferiors.c b/gdb/gdbserver/inferiors.c
index 3659df1..ce87d8c 100644
--- a/gdb/gdbserver/inferiors.c
+++ b/gdb/gdbserver/inferiors.c
@@ -306,6 +306,14 @@ find_process_pid (int pid)
     find_inferior_id (&all_processes, pid_to_ptid (pid));
 }
 
+/* Wrapper around get_first_inferior to return a struct process_info *.  */
+
+struct process_info *
+get_first_process (void)
+{
+  return (struct process_info *) get_first_inferior (&all_processes);
+}
+
 /* Return non-zero if INF, a struct process_info, was started by us,
    i.e. not attached to.  */
 
diff --git a/gdb/gdbserver/inferiors.h b/gdb/gdbserver/inferiors.h
index 88ebbe3..d722616 100644
--- a/gdb/gdbserver/inferiors.h
+++ b/gdb/gdbserver/inferiors.h
@@ -128,6 +128,9 @@ void remove_inferior (struct inferior_list *list,
 
 struct inferior_list_entry *get_first_inferior (struct inferior_list *list);
 
+/* Return the first process in the processes list.  */
+struct process_info *get_first_process (void);
+
 struct process_info *add_process (int pid, int attached);
 void remove_process (struct process_info *process);
 struct process_info *find_process_pid (int pid);
diff --git a/gdb/gdbserver/remote-utils.c b/gdb/gdbserver/remote-utils.c
index 586ced8..c6c516c 100644
--- a/gdb/gdbserver/remote-utils.c
+++ b/gdb/gdbserver/remote-utils.c
@@ -573,9 +573,10 @@ read_ptid (char *buf, char **obuf)
   /* No multi-process.  Just a tid.  */
   tid = hex_or_minus_one (p, &pp);
 
-  /* Since the stub is not sending a process id, then default to
-     what's in the current inferior.  */
-  pid = ptid_get_pid (current_ptid);
+  /* Since GDB is not sending a process id (multi-process extensions
+     are off), then there's only one process.  Default to the first in
+     the list.  */
+  pid = pid_of (get_first_process ());
 
   if (obuf)
     *obuf = pp;
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 9c0d33b..bf7f1eb 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-08-24  Pedro Alves  <palves@redhat.com>
+
+	* gdb.server/connect-without-multi-process.c: New file.
+	* gdb.server/connect-without-multi-process.exp: New file.
+
 2015-08-24  Luis Machado  <lgustavo@codesourcery.com>
 
 	* gdb.opt/inline-markers.c: Make z int.
diff --git a/gdb/testsuite/gdb.server/connect-without-multi-process.c b/gdb/testsuite/gdb.server/connect-without-multi-process.c
new file mode 100644
index 0000000..7e362b2
--- /dev/null
+++ b/gdb/testsuite/gdb.server/connect-without-multi-process.c
@@ -0,0 +1,22 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2015 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
+main (void)
+{
+  return 0;
+}
diff --git a/gdb/testsuite/gdb.server/connect-without-multi-process.exp b/gdb/testsuite/gdb.server/connect-without-multi-process.exp
new file mode 100644
index 0000000..c4214c8
--- /dev/null
+++ b/gdb/testsuite/gdb.server/connect-without-multi-process.exp
@@ -0,0 +1,61 @@
+# Copyright 2015 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/>.  */
+
+# Check that we can connect to GDBserver with the multiprocess
+# extensions disabled, and run to main.
+
+load_lib gdbserver-support.exp
+
+if {[skip_gdbserver_tests]} {
+    return
+}
+
+standard_testfile
+
+if {[build_executable "failed to prepare" $testfile $srcfile debug]} {
+    return -1
+}
+
+# Test spawning gdbserver with a program, connect to it and run to
+# main, with both multiprocess extensions on and off.
+proc do_test {multiprocess} {
+    global binfile
+
+    clean_restart $binfile
+
+    # Make sure we're disconnected, in case we're testing with an
+    # extended-remote board, therefore already connected.
+    gdb_test "disconnect" ".*"
+
+    gdb_test_no_output "set remote multiprocess-feature $multiprocess"
+
+    set res [gdbserver_spawn ${binfile}]
+    set gdbserver_protocol [lindex $res 0]
+    set gdbserver_gdbport [lindex $res 1]
+
+    gdb_test "break main" "Breakpoint .*"
+
+    gdb_test "target $gdbserver_protocol $gdbserver_gdbport" \
+	"Remote debugging using .*" \
+	"target $gdbserver_protocol"
+
+    gdb_test "continue" "main .*" "continue to main"
+}
+
+foreach multiprocess { "off" "auto" } {
+    with_test_prefix "multiprocess=$multiprocess" {
+	do_test $multiprocess
+    }
+}