[PATCH] Notify about breakpoint modification when enabling/disabling single location

[Jan Vrany <jan dot vrany at fit dot cvut dot cz>]

When a single breakpoint location enableness was modified, observers were
not notified about it. This issue is now fixed.

gdb/ChangeLog:

        * breakpoint.c (enable_disable_bp_num_loc): Notify observers.

gdb/testsuite/ChangeLog:

        * gdb.mi/mi-breakpoint-changed-2.c: New file.
        * gdb.mi/mi-breakpoint-changed-2.exp: New file.
---
 gdb/ChangeLog                                 |  4 ++
 gdb/breakpoint.c                              |  2 +
 gdb/testsuite/ChangeLog                       |  5 ++
 .../gdb.mi/mi-breakpoint-changed-2.c          | 42 ++++++++++++++
 .../gdb.mi/mi-breakpoint-changed-2.exp        | 57 +++++++++++++++++++
 5 files changed, 110 insertions(+)
 create mode 100644 gdb/testsuite/gdb.mi/mi-breakpoint-changed-2.c
 create mode 100644 gdb/testsuite/gdb.mi/mi-breakpoint-changed-2.exp

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 98fb955126..0908a2aac4 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2018-05-29  Jan Vrany  <jan.vrany@fit.cvut.cz>
+
+	* breakpoint.c (enable_disable_bp_num_loc): Notify observers.
+
 2018-05-27  Tom Tromey  <tom@tromey.com>
 
 	* Makefile.in (DEPFILES): Don't reference REMOTE_OBS.
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 721afd2c04..3b380ee2a8 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -14225,6 +14225,8 @@ enable_disable_bp_num_loc (int bp_num, int loc_num, bool enable)
 	target_disable_tracepoint (loc);
     }
   update_global_location_list (UGLL_DONT_INSERT);
+
+  gdb::observers::breakpoint_modified.notify (loc->owner);
 }
 
 /* Enable or disable a range of breakpoint locations.  BP_NUM is the
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index b2938b1bf1..c94b236b60 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-05-29  Jan Vrany  <jan.vrany@fit.cvut.cz>
+
+	* gdb.mi/mi-breakpoint-changed-2.c: New file.
+	* gdb.mi/mi-breakpoint-changed-2.exp: New file.
+
 2018-05-24  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	PR gdb/23203
diff --git a/gdb/testsuite/gdb.mi/mi-breakpoint-changed-2.c b/gdb/testsuite/gdb.mi/mi-breakpoint-changed-2.c
new file mode 100644
index 0000000000..c4a295aa21
--- /dev/null
+++ b/gdb/testsuite/gdb.mi/mi-breakpoint-changed-2.c
@@ -0,0 +1,42 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2018 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 <stdio.h>
+#include <stdlib.h>
+
+static inline int 
+add(int a, int b)  {
+    return a + b;
+}
+
+int 
+my_rand_1(void) {
+    return add(rand(), rand());
+}
+
+int
+my_rand_2(void) {
+    int r = my_rand_1();
+    return add(r, r);
+}
+
+int
+main (void)
+{
+  int i = my_rand_1();
+  return 1; /* next-line */
+}
\ No newline at end of file
diff --git a/gdb/testsuite/gdb.mi/mi-breakpoint-changed-2.exp b/gdb/testsuite/gdb.mi/mi-breakpoint-changed-2.exp
new file mode 100644
index 0000000000..a67be67d32
--- /dev/null
+++ b/gdb/testsuite/gdb.mi/mi-breakpoint-changed-2.exp
@@ -0,0 +1,57 @@
+# Copyright 2018 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/>.
+
+
+load_lib mi-support.exp
+set MIFLAGS "-i=mi"
+
+gdb_exit
+if {[mi_gdb_start]} {
+    continue
+}
+
+#
+# Start here
+#
+standard_testfile
+
+if {[gdb_compile "$srcdir/$subdir/$srcfile" $binfile executable {debug additional_flags=-O2}] != "" } {
+    return -1
+}
+
+mi_run_to_main
+
+mi_gdb_test "break add" \
+	{(&.*)*.*~"Breakpoint 2 at.*\\n".*=breakpoint-created,bkpt=\{number="2",type="breakpoint".*\},\{number="2.1",enabled="y".*\}.*\n\^done} \
+	"break add"
+
+# Modify enableness through MI commands shouldn't trigger MI
+# notification.
+mi_gdb_test "-break-disable 2.2" "\\^done" "-break-disable 2.2"
+mi_gdb_test "-break-enable 2.2"  "\\^done" "-break-enable 2.2"	
+
+# Modify enableness through CLI commands should trigger MI
+# notification.
+mi_gdb_test "dis 2.2" \
+	{.*=breakpoint-modified,bkpt=\{number="2",type="breakpoint".*\},\{number="2.1",enabled="y".*\},\{number="2.2",enabled="n".*\}.*\n\^done} \
+	"dis 2.2"
+mi_gdb_test "en 2.2" \
+	{.*=breakpoint-modified,bkpt=\{number="2",type="breakpoint".*\},\{number="2.1",enabled="y".*\},\{number="2.2",enabled="y".*\}.*\n\^done} \
+	"en 2.2"
+
+
+mi_gdb_exit
+
+
-- 
2.17.0