Improve stopping at errors. (#2278)

In some cases the debugger catches (reports) the same
exception multiple times. This is confusing since these
not new errors. This patch fixes this behaviour.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

tests/debugger/do_throw_adv.cmd

@@ -0,0 +1,11 @@
+c
+s
+c
+c
+c
+c
+c
+c
+c
+c
+c

tests/debugger/do_throw_adv.expected

@@ -0,0 +1,42 @@
+Connecting to: localhost:5001
+Stopped at tests/debugger/do_throw_adv.js:15
+(jerry-debugger) c
+Exception throw detected (to disable automatic stop type exception 0)
+Exception hint: 2
+Stopped at tests/debugger/do_throw_adv.js:18 (in f() at line:17, col:1)
+(jerry-debugger) s
+Stopped at tests/debugger/do_throw_adv.js:32
+(jerry-debugger) c
+Exception throw detected (to disable automatic stop type exception 0)
+Exception hint: 4
+Stopped at tests/debugger/do_throw_adv.js:18 (in f() at line:17, col:1)
+(jerry-debugger) c
+Exception throw detected (to disable automatic stop type exception 0)
+Exception hint: Catch again
+Stopped at tests/debugger/do_throw_adv.js:41
+(jerry-debugger) c
+Exception throw detected (to disable automatic stop type exception 0)
+Exception hint: 7
+Stopped at tests/debugger/do_throw_adv.js:18 (in f() at line:17, col:1)
+(jerry-debugger) c
+Exception throw detected (to disable automatic stop type exception 0)
+Exception hint: 10
+Stopped at tests/debugger/do_throw_adv.js:18 (in f() at line:17, col:1)
+(jerry-debugger) c
+Exception throw detected (to disable automatic stop type exception 0)
+Exception hint: Replace the other error
+Stopped at tests/debugger/do_throw_adv.js:63
+(jerry-debugger) c
+Exception throw detected (to disable automatic stop type exception 0)
+Exception hint: 13
+Stopped at tests/debugger/do_throw_adv.js:18 (in f() at line:17, col:1)
+(jerry-debugger) c
+Exception throw detected (to disable automatic stop type exception 0)
+Exception hint: Should be caught
+Stopped at tests/debugger/do_throw_adv.js:76
+(jerry-debugger) c
+Exception throw detected (to disable automatic stop type exception 0)
+Exception hint: 16
+Stopped at tests/debugger/do_throw_adv.js:18 (in f() at line:17, col:1)
+(jerry-debugger) c
+err: Script Error: 16

tests/debugger/do_throw_adv.js

@@ -0,0 +1,81 @@
+// 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.
+
+var a = 1;
+
+function f() {
+  throw ++a;
+}
+
+function g() {
+  f();
+}
+
+function h() {
+  g();
+}
+
+try {
+  h();
+} catch (e) {
+  ++a;
+}
+
+try {
+  h();
+} catch (e) {
+  ++a;
+
+  try {
+    throw "Catch again";
+  } catch (e) {
+    ++a;
+  }
+}
+
+try {
+  try {
+    h();
+  } finally {
+    ++a;
+  }
+  ++a; /* Should not happen. */
+} catch (e) {
+  ++a;
+}
+
+try {
+  try {
+    h();
+  } finally {
+    ++a;
+    throw "Replace the other error";
+  }
+} catch (e) {
+  ++a;
+}
+
+try {
+  break_try_label: try {
+    h();
+  } finally {
+    ++a;
+    break break_try_label;
+  }
+  throw "Should be caught";
+} catch (e) {
+  ++a;
+}
+
+h();