Enabling async functions by default

Enabling async functions by default. Also added one new test case to
verify the arguments.callee behavior.

lib/Common/ConfigFlagsList.h

@@ -565,12 +565,7 @@ PHASE(All)
 #else
     #define DEFAULT_CONFIG_ArrayBufferTransfer     (false)
 #endif
-#ifdef COMPILE_DISABLE_ES7AsyncAwait
-    // If ES7AsyncAwait needs to be disabled by compile flag, DEFAULT_CONFIG_ES7AsyncAwait should be false
-    #define DEFAULT_CONFIG_ES7AsyncAwait           (false)
-#else
-    #define DEFAULT_CONFIG_ES7AsyncAwait           (false)
-#endif
+#define DEFAULT_CONFIG_ES7AsyncAwait           (true)
 #define DEFAULT_CONFIG_ES7ExponentionOperator  (true)
 #define DEFAULT_CONFIG_ES7TrailingComma        (true)
 #define DEFAULT_CONFIG_ES7ValuesEntries        (true)
@@ -943,10 +938,7 @@ FLAGNRC(Boolean, ES6Experimental           , "Enable all experimental features",
 
 FLAGPR           (Boolean, ES6, ES6Species             , "Enable ES6 '@@species' properties and built-in behaviors" , DEFAULT_CONFIG_ES6Species)
 
-#ifndef COMPILE_DISABLE_ES7AsyncAwait
-    #define COMPILE_DISABLE_ES7AsyncAwait 0
-#endif
-FLAGPR_REGOVR_EXP(Boolean, ES6, ES7AsyncAwait          , "Enable ES7 'async' and 'await' keywords"                  , DEFAULT_CONFIG_ES7AsyncAwait)
+FLAGPR           (Boolean, ES6, ES7AsyncAwait          , "Enable ES7 'async' and 'await' keywords"                  , DEFAULT_CONFIG_ES7AsyncAwait)
 FLAGPR           (Boolean, ES6, ES6Classes             , "Enable ES6 'class' and 'extends' keywords"                , DEFAULT_CONFIG_ES6Classes)
 FLAGPR           (Boolean, ES6, ES6DateParseFix        , "Enable ES6 Date.parse fixes"                              , DEFAULT_CONFIG_ES6DateParseFix)
 FLAGPR           (Boolean, ES6, ES6DefaultArgs         , "Enable ES6 Default Arguments"                             , DEFAULT_CONFIG_ES6DefaultArgs)

test/DebuggerCommon/async.js

@@ -0,0 +1,32 @@
+//-------------------------------------------------------------------------------------------------------
+// Copyright (C) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
+//-------------------------------------------------------------------------------------------------------
+
+function foo() {
+    return this.x; /**bp:locals(1);stack()**/
+}
+
+async function af1(a) {
+    await a;
+    return await foo.call({ x : 100 }); /**bp:locals();stack()**/
+}
+
+async function af2() {
+    return await af1(10);
+}
+
+var p = af2();/**bp:
+    resume('step_into');stack();
+    resume('step_into');stack();
+    resume('step_into');stack();
+**/
+p.then(result => {
+        if (result === 100) {
+            print("PASS");
+        }
+    },
+    error => {
+        print("Failed : " + error);
+    } 
+);

test/DebuggerCommon/async.js.dbg.baseline

@@ -0,0 +1,109 @@
+[
+  {
+    "callStack": [
+      {
+        "line": 15,
+        "column": 4,
+        "sourceText": "return await af1(10)",
+        "function": "af2"
+      },
+      {
+        "line": 18,
+        "column": 0,
+        "sourceText": "var p = af2()",
+        "function": "Global code"
+      }
+    ]
+  },
+  {
+    "callStack": [
+      {
+        "line": 10,
+        "column": 4,
+        "sourceText": "await a",
+        "function": "af1"
+      },
+      {
+        "line": 15,
+        "column": 4,
+        "sourceText": "return await af1(10)",
+        "function": "af2"
+      },
+      {
+        "line": 18,
+        "column": 0,
+        "sourceText": "var p = af2()",
+        "function": "Global code"
+      }
+    ]
+  },
+  {
+    "callStack": [
+      {
+        "line": 15,
+        "column": 4,
+        "sourceText": "return await af1(10)",
+        "function": "af2"
+      },
+      {
+        "line": 18,
+        "column": 0,
+        "sourceText": "var p = af2()",
+        "function": "Global code"
+      }
+    ]
+  },
+  {
+    "this": "Object {...}",
+    "arguments": "Object {...}",
+    "locals": {
+      "a": "number 10"
+    }
+  },
+  {
+    "callStack": [
+      {
+        "line": 11,
+        "column": 4,
+        "sourceText": "return await foo.call({ x : 100 })",
+        "function": "af1"
+      }
+    ]
+  },
+  {
+    "this": {
+      "x": "number 100"
+    },
+    "arguments": {
+      "#__proto__": "Object {...}",
+      "length": "number 0",
+      "callee": "function <large string>",
+      "Symbol.iterator": "function <large string>"
+    },
+    "globals": {
+      "WScript": "Object {...}",
+      "print": "function print",
+      "console": "Object {...}",
+      "foo": "function <large string>",
+      "af1": "function <large string>",
+      "af2": "function <large string>",
+      "p": "Promise [...]"
+    }
+  },
+  {
+    "callStack": [
+      {
+        "line": 6,
+        "column": 4,
+        "sourceText": "return this.x",
+        "function": "foo"
+      },
+      {
+        "line": 11,
+        "column": 4,
+        "sourceText": "return await foo.call({ x : 100 })",
+        "function": "af1"
+      }
+    ]
+  }
+]

test/DebuggerCommon/async_step_out.js

@@ -0,0 +1,36 @@
+//-------------------------------------------------------------------------------------------------------
+// Copyright (C) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
+//-------------------------------------------------------------------------------------------------------
+
+function foo() {
+    return 100;
+}
+
+async function af1(a) {
+    return await foo();
+}
+
+async function af2() {
+    return await af1(10);
+}
+
+var p = 1;/**bp:
+    resume('step_over');
+    resume('step_into');
+    resume('step_into');
+    resume('step_out');stack();
+    resume('step_out');stack();**/
+// If we put the break point in the below line after stepping out from af2 we will execute the same break
+// point again which will add more break points. To avoid this adding the break point to a dummy statement.
+p = af2();
+
+p.then(result => {
+        if (result === 100) {
+            print("PASS");
+        }
+    },
+    error => {
+        print("Failed : " + error);
+    } 
+);

test/DebuggerCommon/async_step_out.js.dbg.baseline

@@ -0,0 +1,28 @@
+[
+  {
+    "callStack": [
+      {
+        "line": 14,
+        "column": 4,
+        "sourceText": "return await af1(10)",
+        "function": "af2"
+      },
+      {
+        "line": 25,
+        "column": 0,
+        "sourceText": "p = af2()",
+        "function": "Global code"
+      }
+    ]
+  },
+  {
+    "callStack": [
+      {
+        "line": 25,
+        "column": 0,
+        "sourceText": "p = af2()",
+        "function": "Global code"
+      }
+    ]
+  }
+]

test/DebuggerCommon/async_step_over.js

@@ -0,0 +1,42 @@
+//-------------------------------------------------------------------------------------------------------
+// Copyright (C) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
+//-------------------------------------------------------------------------------------------------------
+
+function foo() {
+    return 100;
+}
+
+async function af1(a) {
+    return await foo();
+}
+
+async function af2() {
+    return await af1(10);
+}
+
+var p = af2();/**bp:
+    resume('step_into');
+    resume('step_into');
+    resume('step_over');stack();
+**/
+p.then(result => {
+        if (result === 100) {
+            print("PASS");
+        }
+    },
+    error => {
+        print("Failed : " + error);
+    } 
+);
+
+p = af2();/**bp:resume('step_over');stack();**/
+p.then(result => {
+        if (result === 100) {
+            print("PASS");
+        }
+    },
+    error => {
+        print("Failed : " + error);
+    } 
+);

test/DebuggerCommon/async_step_over.js.dbg.baseline

@@ -0,0 +1,28 @@
+[
+  {
+    "callStack": [
+      {
+        "line": 14,
+        "column": 4,
+        "sourceText": "return await af1(10)",
+        "function": "af2"
+      },
+      {
+        "line": 17,
+        "column": 0,
+        "sourceText": "var p = af2()",
+        "function": "Global code"
+      }
+    ]
+  },
+  {
+    "callStack": [
+      {
+        "line": 33,
+        "column": 0,
+        "sourceText": "p.then(result => {\r\n        if (result === 100) {\r\n            print(\"PASS\");\r\n        }\r\n    },\r\n    error => {\r\n        print(\"Failed : \" + error);\r\n    } \r\n)",
+        "function": "Global code"
+      }
+    ]
+  }
+]

test/DebuggerCommon/rlexe.xml

@@ -1356,6 +1356,24 @@
       <compile-flags>-debuglaunch -dbgbaseline:generators.js.dbg.baseline -ES6Generators -InspectMaxStringLength:200</compile-flags>
     </default>
   </test>
+  <test>
+    <default>
+      <files>async.js</files>
+      <compile-flags>-debuglaunch -dbgbaseline:async.js.dbg.baseline</compile-flags>
+    </default>
+  </test>
+  <test>
+    <default>
+      <files>async_step_out.js</files>
+      <compile-flags>-debuglaunch -dbgbaseline:async_step_out.js.dbg.baseline</compile-flags>
+    </default>
+  </test>
+  <test>
+    <default>
+      <files>async_step_over.js</files>
+      <compile-flags>-debuglaunch -dbgbaseline:async_step_over.js.dbg.baseline</compile-flags>
+    </default>
+  </test>
   <test>
     <default>
       <files>TypedArray.js</files>

test/es6/es6_stable.baseline

@@ -3,8 +3,8 @@ FLAG ES6 = 1 - setting child flag Simdjs = 0
 FLAG Simdjs = 0
 FLAG ES6 = 1 - setting child flag ES6Species = 1
 FLAG ES6Species = 1
-FLAG ES6 = 1 - setting child flag ES7AsyncAwait = 0
-FLAG ES7AsyncAwait = 0
+FLAG ES6 = 1 - setting child flag ES7AsyncAwait = 1
+FLAG ES7AsyncAwait = 1
 FLAG ES6 = 1 - setting child flag ES6Classes = 1
 FLAG ES6Classes = 1
 FLAG ES6 = 1 - setting child flag ES6DateParseFix = 1

test/es6/es6_stable.enable_disable.baseline

@@ -3,8 +3,8 @@ FLAG ES6 = 1 - setting child flag Simdjs = 0
 FLAG Simdjs = 0
 FLAG ES6 = 1 - setting child flag ES6Species = 1
 FLAG ES6Species = 1
-FLAG ES6 = 1 - setting child flag ES7AsyncAwait = 0
-FLAG ES7AsyncAwait = 0
+FLAG ES6 = 1 - setting child flag ES7AsyncAwait = 1
+FLAG ES7AsyncAwait = 1
 FLAG ES6 = 1 - setting child flag ES6Classes = 1
 FLAG ES6Classes = 1
 FLAG ES6 = 1 - setting child flag ES6DateParseFix = 1