Test case of V8 failing to step into in some cases.

test/mjsunit/debug-stepin-property-function-call.js

-// Copyright 2009 the V8 project authors. All rights reserved.
+// Copyright 2014 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --expose-debug-as debug
-
+// Flags: --expose-debug-as debug --nocrankshaft
 // Get the Debug object exposed from the debug context global object.
 Debug = debug.Debug
 
 var exception = null;
 var state = 1;
-var expected_source_line_text = null;
-var expected_function_name = null;
 
 // Simple debug event handler which first time will cause 'step in' action
-// and than check that execution is paused inside function
-// expected_function_name.
+// to get into g.call and than check that execution is stopped inside
+// function 'g'.
 function listener(event, exec_state, event_data, data) {
   try {
     if (event == Debug.DebugEvent.Break) {
       if (state == 1) {
-        exec_state.prepareStep(Debug.StepAction.StepIn, 2);
+        exec_state.prepareStep(Debug.StepAction.StepIn, 3);
         state = 2;
       } else if (state == 2) {
-        assertEquals(expected_function_name, event_data.func().name());
-        assertEquals(expected_source_line_text,
-                     event_data.sourceLineText());
+        assertTrue(event_data.sourceLineText().indexOf("Expected to step") > 0,
+          "source line: \"" + event_data.sourceLineText() + "\"");
         state = 3;
       }
     }
   } catch(e) {
+    print("Exception: " + e);
     exception = e;
   }
 };
 
 // Add the debug event listener.
 Debug.setListener(listener);
 
-var a = [1,2,3,4,5];
+var count = 0;
+var obj = {
+  fun: function() {
+    ++count;
+    return count; // Expected to step
+  }
+};
+obj.fun2 = obj.fun;
 
-// Test step into function call from a function without local variables.
-function testStepInArraySlice() {
-  expected_function_name = 'testStepInArraySlice';
-  expected_source_line_text = '}  // expected line';
+function testCall_Dots() {
   debugger;
-  var s = Array.prototype.slice.call(a, 2,3);
-}  // expected line
+  obj.fun();
+}
 
-state = 1;
-testStepInArraySlice();
-assertNull(exception);
-assertEquals(3, state);
+function testCall_Quotes() {
+  debugger;
+  obj["fun"]();
+}
+
+function testCall_Call() {
+  debugger;
+  obj.fun.call(obj);
+}
+
+function testCall_Apply() {
+  debugger;
+  obj.fun.apply(obj);
+}
+
+function testCall_Variable() {
+  var functionName = "fun";
+  debugger;
+  obj[functionName]();
+}
+
+function testCall_Fun2() {
+  debugger;
+  obj.fun2();
+}
+
+function testCall_InternStrings() {
+  var cache = { "fun": "fun" };
+  var functionName = "fu" + "n";
+  debugger;
+  obj[cache[functionName]]();
+}
+
+function testCall_ViaFunRef() {
+  var functionName = "fu" + "n";
+  var funRef = obj[functionName];
+  debugger;
+  funRef();
+}
+
+// bug 2888
+function testCall_RuntimeVariable1() {
+  var functionName = "fu" + "n";
+  debugger;
+  obj[functionName]();
+}
+
+// bug 2888
+function testCall_RuntimeVariable2() {
+  var functionName = "un".replace(/u/, "fu");
+  debugger;
+  obj[functionName]();
+}
+
+// bug 2888
+function testCall_RuntimeVariable3() {
+  var expr = "fu" + "n";
+  const functionName = expr;
+  assertEquals("fun", functionName);
+  debugger;
+  obj[functionName]();
+}
+
+var functionsCalled = 0;
+for (var n in this) {
+  if (n.substr(0, 4) != 'test' || typeof this[n] !== "function") {
+    continue;
+  }
+  state = 1;
+  print("Running " + n + "...");
+  this[n]();
+  ++functionsCalled;
+  assertNull(exception, n);
+  assertEquals(3, state, n);
+  assertEquals(functionsCalled, count, n);
+}
+
+assertEquals(11, functionsCalled);
 
 // Get rid of the debug event listener.
 Debug.setListener(null);