Move test_target_ops to a separate file

There's no need to have all target.h users seeing this type.

Also helps with a follow up patch.

gdb/ChangeLog:
2018-11-30  Pedro Alves  <palves@redhat.com>

	* Makefile.in (COMMON_SFILES): Add test-target.c.
	* gdbarch-selftests.c: Include "test-target.h".
	* regcache.c: Include "test-target.h".
	* target.c (test_target_info, test_target_ops::info): Move to ...
	* test-target.c: ... this new file.
	* target.h (test_target_ops): Move to ...
	* test-target.h: ... this new file.

gdb/ChangeLog

@@ -1,3 +1,13 @@
+2018-11-30  Pedro Alves  <palves@redhat.com>
+
+	* Makefile.in (COMMON_SFILES): Add test-target.c.
+	* gdbarch-selftests.c: Include "test-target.h".
+	* regcache.c: Include "test-target.h".
+	* target.c (test_target_info, test_target_ops::info): Move to ...
+	* test-target.c: ... this new file.
+	* target.h (test_target_ops): Move to ...
+	* test-target.h: ... this new file.
+
 2018-11-29  Philippe Waroquiers  <philippe.waroquiers@skynet.be>
 
 	* source.c (forward_search_command): Fix leak by using

gdb/Makefile.in

@@ -1110,6 +1110,7 @@ COMMON_SFILES = \
 	target-dcache.c \
 	target-descriptions.c \
 	target-memory.c \
+	test-target.c \
 	thread.c \
 	thread-iter.c \
 	thread-fsm.c \

gdb/gdbarch-selftests.c

@@ -24,6 +24,7 @@
 #include "inferior.h"
 #include "gdbthread.h"
 #include "target.h"
+#include "test-target.h"
 #include "target-float.h"
 #include "common/def-vector.h"
 

gdb/regcache.c

@@ -21,6 +21,7 @@
 #include "inferior.h"
 #include "gdbthread.h"
 #include "target.h"
+#include "test-target.h"
 #include "gdbarch.h"
 #include "gdbcmd.h"
 #include "regcache.h"

gdb/target.c

@@ -192,27 +192,6 @@ target_command (const char *arg, int from_tty)
 		  gdb_stdout);
 }
 
-#if GDB_SELF_TEST
-namespace selftests {
-
-/* A mock process_stratum target_ops that doesn't read/write registers
-   anywhere.  */
-
-static const target_info test_target_info = {
-  "test",
-  N_("unit tests target"),
-  N_("You should never see this"),
-};
-
-const target_info &
-test_target_ops::info () const
-{
-  return test_target_info;
-}
-
-} /* namespace selftests */
-#endif /* GDB_SELF_TEST */
-
 /* Default target_has_* methods for process_stratum targets.  */
 
 int

gdb/target.h

@@ -2574,49 +2574,4 @@ extern void target_prepare_to_generate_core (void);
 /* See to_done_generating_core.  */
 extern void target_done_generating_core (void);
 
-#if GDB_SELF_TEST
-namespace selftests {
-
-/* A mock process_stratum target_ops that doesn't read/write registers
-   anywhere.  */
-
-class test_target_ops : public target_ops
-{
-public:
-  test_target_ops ()
-    : target_ops {}
-  {
-    to_stratum = process_stratum;
-  }
-
-  const target_info &info () const override;
-
-  bool has_registers () override
-  {
-    return true;
-  }
-
-  bool has_stack () override
-  {
-    return true;
-  }
-
-  bool has_memory () override
-  {
-    return true;
-  }
-
-  void prepare_to_store (regcache *regs) override
-  {
-  }
-
-  void store_registers (regcache *regs, int regno) override
-  {
-  }
-};
-
-
-} // namespace selftests
-#endif /* GDB_SELF_TEST */
-
 #endif /* !defined (TARGET_H) */

gdb/test-target.c

@@ -0,0 +1,39 @@
+/* A mock process_stratum target_ops
+
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   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 "defs.h"
+#include "test-target.h"
+
+#if GDB_SELF_TEST
+namespace selftests {
+
+static const target_info test_target_info = {
+  "test",
+  N_("unit tests target"),
+  N_("You should never see this"),
+};
+
+const target_info &
+test_target_ops::info () const
+{
+  return test_target_info;
+}
+
+} /* namespace selftests */
+#endif /* GDB_SELF_TEST */

gdb/test-target.h

@@ -0,0 +1,69 @@
+/* A mock process_stratum target_ops
+
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   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/>.  */
+
+#ifndef TEST_TARGET_H
+#define TEST_TARGET_H
+
+#include "target.h"
+
+#if GDB_SELF_TEST
+namespace selftests {
+
+/* A mock process_stratum target_ops that doesn't read/write registers
+   anywhere.  */
+
+class test_target_ops : public target_ops
+{
+public:
+  test_target_ops ()
+    : target_ops {}
+  {
+    to_stratum = process_stratum;
+  }
+
+  const target_info &info () const override;
+
+  bool has_registers () override
+  {
+    return true;
+  }
+
+  bool has_stack () override
+  {
+    return true;
+  }
+
+  bool has_memory () override
+  {
+    return true;
+  }
+
+  void prepare_to_store (regcache *regs) override
+  {
+  }
+
+  void store_registers (regcache *regs, int regno) override
+  {
+  }
+};
+
+} // namespace selftests
+#endif /* GDB_SELF_TEST */
+
+#endif /* !defined (TEST_TARGET_H) */