Add finish debugger command. (#2240)

With this command the engine continue running just after the function
in the current stack frame returns.

JerryScript-DCO-1.0-Signed-off-by: Imre Kiss kissi.szeged@partner.samsung.com

tests/debugger/do_finish.cmd

@@ -0,0 +1,6 @@
+finish
+finish
+finish
+step
+finish
+continue

tests/debugger/do_finish.expected

@@ -0,0 +1,20 @@
+Connecting to: localhost:5001
+Stopped at tests/debugger/do_finish.js:15
+(jerry-debugger) finish
+out: finish-test
+Stopped at tests/debugger/do_finish.js:26
+(jerry-debugger) finish
+Stopped at tests/debugger/do_finish.js:18 (in foo() at line:17, col:1)
+(jerry-debugger) finish
+out: foo
+out: bar
+Stopped at tests/debugger/do_finish.js:42
+(jerry-debugger) step
+Stopped at tests/debugger/do_finish.js:29 (in dog() at line:28, col:1)
+(jerry-debugger) finish
+out: *bark*
+out: *sit*
+out: *bark*
+Stopped at tests/debugger/do_finish.js:44
+(jerry-debugger) continue
+out: END: finish-test

tests/debugger/do_finish.js

@@ -0,0 +1,44 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+print("finish-test");
+
+function foo() {
+  print("foo");
+  return bar();
+}
+
+function bar() {
+  return "bar";
+}
+
+print(foo());
+
+function dog() {
+  bark();
+  sit();
+  bark();
+}
+
+function bark() {
+  print("*bark*");
+}
+
+function sit() {
+  print("*sit*");
+}
+
+dog();
+
+print("END: finish-test");

tests/debugger/do_help.expected

@@ -4,8 +4,8 @@ Stopped at tests/debugger/do_help.js:15
 
 Documented commands (type help <topic>):
 ========================================
-b          bt        delete   e          help      ms    quit    source
-backtrace  c         display  eval       list      n     s       src   
-break      continue  dump     exception  memstats  next  scroll  step  
+b          bt        delete   e          f       list      n     s       src 
+backtrace  c         display  eval       finish  memstats  next  scroll  step
+break      continue  dump     exception  help    ms        quit  source
 
 (jerry-debugger) quit