08f68102f8
Declare Variables with a name and position, rather than by passing through a VariableProxy. This allows us to not create dummy proxies for things like function declarations, and allows us to consider those declarations unused. As a side-effect, we also have to check if a variable is unused in the bytecode generator (as it will no longer be allocated), and we end up skip generating code/SFIs for dead variables/functions. Change-Id: I4c2c872473f23e124f9456b4b92f87159658f8e0 Reviewed-on: https://chromium-review.googlesource.com/c/1414916 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Toon Verwaest <verwaest@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#59088}
46 lines
1010 B
JavaScript
46 lines
1010 B
JavaScript
// 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-always-opt --no-stress-opt
|
|
|
|
Debug = debug.Debug
|
|
|
|
var exception = null;
|
|
function listener(event, exec_state, event_data, data) {
|
|
if (event != Debug.DebugEvent.Break) return;
|
|
try {
|
|
exec_state.frame(0).evaluate("a = 2");
|
|
exec_state.frame(0).evaluate("e = 3");
|
|
exec_state.frame(0).evaluate("bar()");
|
|
exec_state.frame(0).evaluate("a++");
|
|
exec_state.frame(0).evaluate("e++");
|
|
} catch (e) {
|
|
exception = e;
|
|
print(e + e.stack);
|
|
}
|
|
}
|
|
|
|
Debug.setListener(listener);
|
|
|
|
(function() {
|
|
"use strict";
|
|
try {
|
|
throw 1;
|
|
} catch (e) {
|
|
let a = 1;
|
|
function bar() {
|
|
a *= 2;
|
|
e *= 2;
|
|
}
|
|
// Make sure bar is 'used' so that it is visible to the debugger.
|
|
bar;
|
|
debugger;
|
|
assertEquals(5, a);
|
|
assertEquals(7, e);
|
|
}
|
|
})();
|
|
|
|
Debug.setListener(null);
|
|
assertNull(exception);
|