Support debugger inspection of locals in optimized frames

test/mjsunit/debug-evaluate-locals-optimized.js

+// Copyright 2008 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 --allow-natives-syntax
+// Get the Debug object exposed from the debug context global object.
+Debug = debug.Debug
+
+listenerComplete = false;
+exception = false;
+
+
+function listener(event, exec_state, event_data, data) {
+  try {
+    if (event == Debug.DebugEvent.Break)
+    {
+      assertEquals(6, exec_state.frameCount());
+
+      for (var i = 0; i < exec_state.frameCount(); i++) {
+        var frame = exec_state.frame(i);
+        // All frames except the bottom one has normal variables a and b.
+        if (i < exec_state.frameCount() - 1) {
+          assertEquals('a', frame.localName(0));
+          assertEquals('b', frame.localName(1));
+          assertEquals(i * 2 + 1, frame.localValue(0).value());
+          assertEquals(i * 2 + 2, frame.localValue(1).value());
+        }
+
+        // When function f is optimized (2 means YES, see runtime.cc) we
+        // expect an optimized frame for f with g1, g2 and g3 inlined.
+        if (%GetOptimizationStatus(f) == 2) {
+          if (i == 1 || i == 2 || i == 3) {
+            assertTrue(frame.isOptimizedFrame());
+            assertTrue(frame.isInlinedFrame());
+          } else if (i == 4) {
+            assertTrue(frame.isOptimizedFrame());
+            assertFalse(frame.isInlinedFrame());
+          } else {
+            assertFalse(frame.isOptimizedFrame());
+            assertFalse(frame.isInlinedFrame());
+          }
+        }
+      }
+
+      // Indicate that all was processed.
+      listenerComplete = true;
+    }
+  } catch (e) {
+    exception = e
+  };
+};
+
+f();f();f();
+%OptimizeFunctionOnNextCall(f);
+f();
+
+// Add the debug event listener.
+Debug.setListener(listener);
+
+function h(x, y) {
+  var a = 1;
+  var b = 2;
+  debugger;  // Breakpoint.
+};
+
+function g3(x, y) {
+  var a = 3;
+  var b = 4;
+  h(a, b);
+};
+
+function g2(x, y) {
+  var a = 5;
+  var b = 6;
+  g3(a, b);
+};
+
+function g1(x, y) {
+  var a = 7;
+  var b = 8;
+  g2(a, b);
+};
+
+function f(x, y) {
+  var a = 9;
+  var b = 10;
+  g1(a, b);
+};
+
+f(11, 12);
+
+// Make sure that the debug event listener vas invoked.
+assertFalse(exception, "exception in listener " + exception)
+assertTrue(listenerComplete);
+
+Debug.setListener(null);