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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --no-analyze-environment-liveness
// Test that debug-evaluate only resolves variables that are used by
// the function inside which we debug-evaluate. This is to avoid
// incorrect variable resolution when a context-allocated variable is
// shadowed by a stack-allocated variable.
Debug = debug.Debug
var exception = null;
function listener(event, exec_state, event_data, data) {
if (event != Debug.DebugEvent.Break) return;
try {
for (var i = 0; i < exec_state.frameCount() - 1; i++) {
var frame = exec_state.frame(i);
var value;
try {
value = frame.evaluate("x").value();
} catch (e) {
value = e.name;
}
print(frame.sourceLineText());
var expected = frame.sourceLineText().match(/\/\/ (.*$)/)[1];
assertEquals(String(expected), String(value));
}
assertEquals("[object global]",
String(exec_state.frame(0).evaluate("this").value()));
assertEquals("y", exec_state.frame(0).evaluate("y").value());
assertEquals("a", exec_state.frame(0).evaluate("a").value());
exec_state.frame(0).evaluate("a = 'A'");
assertThrows(() => exec_state.frame(0).evaluate("z"), ReferenceError);
} catch (e) {
exception = e;
print(e + e.stack);
}
}
Debug.setListener(listener);
var a = "a";
(function() {
var x = 1; // context allocate x
(() => x);
var y = "y";
var z = "z";
(function() {
var x = 2; // stack allocate shadowing x
(function() {
y; // access y
debugger; // ReferenceError
})(); // 2
})(); // 1
return y;
})();
assertEquals("A", a);
a = "a";
(function() {
var x = 1; // context allocate x
(() => x);
var y = "y";
var z = "z";
(function() {
var x = 2; // stack allocate shadowing x
(() => {
y;
a;
this; // context allocate receiver
debugger; // ReferenceError
})(); // 2
})(); // 1
return y;
})();
assertEquals("A", a);
Debug.setListener(null);
assertNull(exception);
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