Fix =thread-exited not showing up when detaching (PR 15564)

I sent a patch in 2013 for this (incorrectly named =thread-created):

  https://cygwin.com/ml/gdb-patches/2013-06/msg00129.html

Tom Tromey was ok with the change, but suggested to add a test as well.
Then I forgot about this patch until today. So here it is again, with the
corresponding test.

The problem is that the =thread-exited event does not appear when detaching
from a local process. It does appear with remote though. It's not a really
big deal, but I'd like it to be consistent.

Tested with local and remote Linux on my Ubuntu 14.04.

gdb/ChangeLog:

	PR gdb/15564
	* inferior.c (detach_inferior): Call exit_inferior_1 with silent = 0.

gdb/testsuite/ChangeLog:

	PR gdb/15564
	* gdb.mi/mi-detach.exp: New file.

4 files changed, 46 insertions, 1 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index eca000f..37d619b 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2015-06-02  Simon Marchi  <simon.marchi@ericsson.com>
+
+	PR gdb/15564
+	* inferior.c (detach_inferior): Call exit_inferior_1 with silent = 0.
+
 2015-06-02  Yao Qi  <yao.qi@linaro.org>
 
 	* i386-linux-nat.c: Include linux-nat.h.
diff --git a/gdb/inferior.c b/gdb/inferior.c
index ba320b5..d0783d3 100644
--- a/gdb/inferior.c
+++ b/gdb/inferior.c
@@ -310,7 +310,7 @@ detach_inferior (int pid)
 {
   struct inferior *inf = find_inferior_pid (pid);
 
-  exit_inferior_1 (inf, 1);
+  exit_inferior_1 (inf, 0);
 
   if (print_inferior_events)
     printf_unfiltered (_("[Inferior %d detached]\n"), pid);
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 5477f6c..c4f61a0 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-06-02  Simon Marchi  <simon.marchi@ericsson.com>
+
+	PR gdb/15564
+	* gdb.mi/mi-detach.exp: New file.
+
 2015-06-01  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
 	PR symtab/18392
diff --git a/gdb/testsuite/gdb.mi/mi-detach.exp b/gdb/testsuite/gdb.mi/mi-detach.exp
new file mode 100644
index 0000000..88759a9
--- /dev/null
+++ b/gdb/testsuite/gdb.mi/mi-detach.exp
@@ -0,0 +1,35 @@
+# 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/>.
+
+# Test that detaching from the inferior produces the right MI records.
+
+load_lib mi-support.exp
+set MIFLAGS "-i=mi"
+
+gdb_exit
+if [mi_gdb_start] {
+    continue
+}
+
+standard_testfile basics.c
+
+if {[build_executable $testfile.exp $testfile $srcfile {debug}] == -1} {
+     untested mi-detach.exp
+     return -1
+}
+
+mi_run_to_main
+
+mi_gdb_test "-target-detach" "=thread-exited,id=\"1\".*=thread-group-exited,id=\"i1\".*" "detach"