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}
58 lines
1.7 KiB
JavaScript
58 lines
1.7 KiB
JavaScript
// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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let {session, contextGroup, Protocol} = InspectorTest.start('Tests side-effect-free evaluation');
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contextGroup.addScript(`
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function testFunction()
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{
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var o = 0;
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function f() { return 1; }
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function g() { o = 2; return o; }
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f,g;
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debugger;
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}
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//# sourceURL=foo.js`);
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Protocol.Debugger.enable();
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Protocol.Debugger.oncePaused().then(debuggerPaused);
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Protocol.Runtime.evaluate({ "expression": "setTimeout(testFunction, 0)" });
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var topFrameId;
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function debuggerPaused(messageObject)
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{
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InspectorTest.log("Paused on 'debugger;'");
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topFrameId = messageObject.params.callFrames[0].callFrameId;
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Protocol.Debugger.evaluateOnCallFrame({ callFrameId: topFrameId, expression: "f()"}).then(evaluatedFirst);
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}
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function evaluatedFirst(response)
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{
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InspectorTest.log("f() returns " + response.result.result.value);
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Protocol.Debugger.evaluateOnCallFrame({ callFrameId: topFrameId, expression: "g()"}).then(evaluatedSecond);
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}
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function evaluatedSecond(response)
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{
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InspectorTest.log("g() returns " + response.result.result.value);
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Protocol.Debugger.evaluateOnCallFrame({ callFrameId: topFrameId, expression: "f()", throwOnSideEffect: true}).then(evaluatedThird);
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}
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function evaluatedThird(response)
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{
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InspectorTest.log("f() returns " + response.result.result.value);
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Protocol.Debugger.evaluateOnCallFrame({ callFrameId: topFrameId, expression: "g()", throwOnSideEffect: true}).then(evaluatedFourth);
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InspectorTest.completeTest();
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}
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function evaluatedFourth(response)
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{
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InspectorTest.log("g() throws " + response.result.result.className);
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InspectorTest.completeTest();
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}
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