3 files changed, 141 insertions, 0 deletions
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 6d3fa56..bd7257f 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,5 +1,10 @@
 2014-07-14  Pedro Alves  <palves@redhat.com>
 
+	* gdb.base/double-prompt-target-event-error.c: New file.
+	* gdb.base/double-prompt-target-event-error.exp: New file.
+
+2014-07-14  Pedro Alves  <palves@redhat.com>
+
 	PR gdb/17072
 	* gdb.base/paginate-inferior-exit.c: New file.
 	* gdb.base/paginate-inferior-exit.exp: New file.
diff --git a/gdb/testsuite/gdb.base/double-prompt-target-event-error.c b/gdb/testsuite/gdb.base/double-prompt-target-event-error.c
new file mode 100644
index 0000000..b383188
--- /dev/null
+++ b/gdb/testsuite/gdb.base/double-prompt-target-event-error.c
@@ -0,0 +1,25 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2014 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 <unistd.h>
+
+int
+main (void)
+{
+  sleep (3);
+  return 0; /* after sleep */
+}
diff --git a/gdb/testsuite/gdb.base/double-prompt-target-event-error.exp b/gdb/testsuite/gdb.base/double-prompt-target-event-error.exp
new file mode 100644
index 0000000..5571cdf
--- /dev/null
+++ b/gdb/testsuite/gdb.base/double-prompt-target-event-error.exp
@@ -0,0 +1,111 @@
+# Copyright (C) 2014 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/>.
+
+standard_testfile
+
+if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug] == -1} {
+    return -1
+}
+
+# Test throwing an error while GDB is handling a target event.  We use
+# a ctrl-c/quit in a pagination prompt to emulate an error.  COMMAND
+# is either "continue" or "wrapcont".  The latter is a continue issued
+# from a user-defined command.  That exercises the case of the
+# interpreter forced sync, which was the case that originally had a
+# bug.
+
+proc cancel_pagination_in_target_event { command } {
+    global binfile srcfile
+    global gdb_prompt pagination_prompt
+
+    set testline [gdb_get_line_number "after sleep"]
+
+    with_test_prefix "ctrlc target event: $command" {
+	clean_restart $binfile
+
+	if ![runto_main] then {
+	    fail "Can't run to main"
+	    return 0
+	}
+
+	gdb_test "b $srcfile:$testline" \
+	    "Breakpoint .*$srcfile, line $testline.*" \
+	    "set breakpoint"
+
+	gdb_test_no_output "set height 2"
+
+	if { $command == "wrapcont" } {
+	    gdb_test_multiple "define wrapcont" "define user command: wrapcont" {
+		-re "Type commands for definition of \"wrapcont\".\r\nEnd with a line saying just \"end\".\r\n>$" {
+		    # Note that "Continuing." is ommitted when
+		    # "continue" is issued from a user-defined
+		    # command.  Issue it ourselves.
+		    gdb_test "echo Continuing\.\ncontinue\nend" "" \
+			"define user command: wrapcont"
+		}
+	    }
+	}
+
+	# Wait for pagination prompt after the "Continuing" line,
+	# indicating the program was running and then stopped.
+	set saw_continuing 0
+	set test "continue to pagination"
+	gdb_test_multiple "$command" $test {
+	    -re "$pagination_prompt$" {
+		if {$saw_continuing} {
+		    pass $test
+		} else {
+		    send_gdb "\n"
+		    exp_continue
+		}
+	    }
+	    -re "Continuing" {
+		set saw_continuing 1
+		exp_continue
+	    }
+	    -notransfer -re "<return>" {
+		# Otherwise gdb_test_multiple considers this an error.
+		exp_continue
+	    }
+	}
+
+	# We're now stopped in a pagination query while handling a
+	# target event (printing where the program stopped).  Quitting
+	# the pagination should result in only one prompt being
+	# output.
+	send_gdb "\003p 1\n"
+
+	set test "no double prompt"
+	gdb_test_multiple "" $test {
+	    -re "$gdb_prompt.*$gdb_prompt.*$gdb_prompt $" {
+		fail $test
+	    }
+	    -re "$gdb_prompt .* = 1\r\n$gdb_prompt $" {
+		pass $test
+	    }
+	    -notransfer -re "<return>" {
+		# Otherwise gdb_test_multiple considers this an error.
+		exp_continue
+	    }
+	}
+
+	# In case the board file wants to send further commands.
+	gdb_test_no_output "set height unlimited"
+    }
+}
+
+foreach variant { "continue" "wrapcont" } {
+    cancel_pagination_in_target_event $variant
+}