PR c++/13653:

* thread.c (struct current_thread_cleanup) <was_removable>: New
	field.
	(do_restore_current_thread_cleanup): Restore 'removable' field.
	(restore_current_thread_cleanup_dtor): Likewise.
	(make_cleanup_restore_current_thread): Initialize new field.
testsuite/gdb
	* gdb.base/inferior-died.c: New file.
	* gdb.base/inferior-died.exp: New file.

gdb/ChangeLog

@@ -1,3 +1,11 @@
+2012-02-16  Tom Tromey  <tromey@redhat.com>
+
+	PR c++/13653:
+	* thread.c (struct current_thread_cleanup) <was_removable>: New
+	field.
+	(restore_current_thread_cleanup_dtor): Restore 'removable' field.
+	(make_cleanup_restore_current_thread): Initialize new field.
+
 2012-02-15  Kevin Buettner  <kevinb@redhat.com>
 
 	* MAINTAINERS: Add rl78 to target ISA section.

gdb/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2012-02-16  Tom Tromey  <tromey@redhat.com>
+
+	* gdb.base/inferior-died.c: New file.
+	* gdb.base/inferior-died.exp: New file.
+
 2012-02-15  Aleksandar Ristovski  <aristovski@qnx.com>
 
 	* gdb.base/break-inline.exp: New file.

gdb/testsuite/gdb.base/inferior-died.c

@@ -0,0 +1,37 @@
+/* Test for fork-related gdb bug
+
+   Copyright 2012 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 <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+void function(void)
+{
+  exit (0);			/* Break here */
+}
+
+int main()
+{
+  pid_t child = fork ();
+
+  if (child == 0)
+    function ();
+  else
+    waitpid (child, NULL, 0);
+}

gdb/testsuite/gdb.base/inferior-died.exp

@@ -0,0 +1,56 @@
+# Copyright 2012 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/>.
+
+if { [is_remote target] || ![isnative] } then {
+    unsupported "inferior-died.exp"
+    continue
+}
+
+# Until "set follow-fork-mode" and "catch fork" are implemented on
+# other targets...
+#
+if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-*-linux*"]} then {
+    unsupported "inferior-died.exp"
+    continue
+}
+
+if { ![support_displaced_stepping] } {
+    unsupported "inferior-died.exp"
+    return -1
+}
+
+set testfile "inferior-died"
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+
+if { [prepare_for_testing ${testfile}.exp ${testfile} ${testfile}.c] } {
+    return -1
+}
+
+gdb_test_no_output "set detach-on-fork off"
+gdb_test_no_output "set target-async on"
+gdb_test_no_output "set non-stop on"
+
+if ![runto_main] {
+    return
+}
+
+set line [gdb_get_line_number "Break here"]
+gdb_breakpoint $srcfile:$line
+
+gdb_continue_to_breakpoint "breakpoint"
+
+gdb_test "inferior 2" "Switching to inferior 2.*"
+gdb_test "continue" "exited normally.*"

gdb/thread.c

@@ -1072,6 +1072,7 @@ struct current_thread_cleanup
   int selected_frame_level;
   int was_stopped;
   int inf_id;
+  int was_removable;
 };
 
 static void
@@ -1112,10 +1113,14 @@ restore_current_thread_cleanup_dtor (void *arg)
 {
   struct current_thread_cleanup *old = arg;
   struct thread_info *tp;
+  struct inferior *inf;
 
   tp = find_thread_ptid (old->inferior_ptid);
   if (tp)
     tp->refcount--;
+  inf = find_inferior_id (old->inf_id);
+  if (inf != NULL)
+    inf->removable = old->was_removable;
   xfree (old);
 }
 
@@ -1129,6 +1134,7 @@ make_cleanup_restore_current_thread (void)
   old = xmalloc (sizeof (struct current_thread_cleanup));
   old->inferior_ptid = inferior_ptid;
   old->inf_id = current_inferior ()->num;
+  old->was_removable = current_inferior ()->removable;
 
   if (!ptid_equal (inferior_ptid, null_ptid))
     {
@@ -1156,6 +1162,8 @@ make_cleanup_restore_current_thread (void)
 	tp->refcount++;
     }
 
+  current_inferior ()->removable = 0;
+
   return make_cleanup_dtor (do_restore_current_thread_cleanup, old,
 			    restore_current_thread_cleanup_dtor);
 }