c39123dd53
The inspector uses V8's API handles and should not access V8 internals. This change makes sure it can use the coverage data in an encapsulated way. R=jgruber@chromium.org, kozyatinskiy@chromium.org BUG=v8:5808 Review-Url: https://codereview.chromium.org/2696163002 Cr-Commit-Position: refs/heads/master@{#43231}
94 lines
1.9 KiB
JavaScript
94 lines
1.9 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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// Flags: --allow-natives-syntax --no-always-opt
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// Test precise code coverage.
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function GetCoverage(source) {
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for (var script of %DebugCollectCoverage()) {
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if (script.script.source == source) return script.toplevel;
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}
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return undefined;
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}
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function ApplyCoverageToSource(source, range) {
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var content = "";
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var cursor = range.start;
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if (range.inner) for (var inner of range.inner) {
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content += source.substring(cursor, inner.start);
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content += ApplyCoverageToSource(source, inner);
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cursor = inner.end;
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}
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content += source.substring(cursor, range.end);
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return `[${content}](${range.name}:${range.count})`;
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}
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function TestCoverage(name, source, expectation) {
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source = source.trim();
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eval(source);
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%CollectGarbage("remove dead objects");
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var coverage = GetCoverage(source);
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if (expectation === undefined) {
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assertEquals(undefined, coverage);
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} else {
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expectation = expectation.trim();
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var result = ApplyCoverageToSource(source, coverage);
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print(result);
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assertEquals(expectation, result, name + " failed");
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}
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}
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// Without precise coverage enabled, we lose coverage data to the GC.
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TestCoverage(
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"call an IIFE",
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`
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(function f() {})();
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`,
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undefined // The IIFE has been garbage-collected.
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);
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TestCoverage(
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"call locally allocated function",
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`
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for (var i = 0; i < 10; i++) {
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let f = () => 1;
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i += f();
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}
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`,
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undefined
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);
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// This does not happen with precise coverage enabled.
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%DebugTogglePreciseCoverage(true);
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TestCoverage(
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"call an IIFE",
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`
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(function f() {})();
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`,
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`
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[([function f() {}](f:1))();](:1)
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`
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);
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TestCoverage(
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"call locally allocated function",
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`
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for (var i = 0; i < 10; i++) {
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let f = () => 1;
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i += f();
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}
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`,
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`
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[for (var i = 0; i < 10; i++) {
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let f = [() => 1](f:5);
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i += f();
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}](:1)
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`
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);
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%DebugTogglePreciseCoverage(false);
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