[debug] introduce precise binary code coverage.

test/inspector/cpu-profiler/coverage.js

 // Copyright 2017 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: --allow-natives-syntax
+
 var source =
 `
 function fib(x) {
   if (x < 2) return 1;
   return fib(x-1) + fib(x-2);
 }
+function is_optimized(f) {
+  return (%GetOptimizationStatus(f) & 16) ? "optimized" : "unoptimized";
+}
 (function iife() {
   return 1;
 })();
 fib(5);
 `;
 
 var break_source =
 `
 function g() {
   debugger;
 }
 function f(x) {
   if (x == 0) g();
   else f(x - 1);
 }
 function h() {
   g();
 }
 f(3);
 `;
 
 InspectorTest.log("Test collecting code coverage data with Profiler.collectCoverage.");
 
 function ClearAndGC() {
-  return Protocol.Runtime.evaluate({ expression: "fib = null;" }).then(GC);
+  return Protocol.Runtime.evaluate({ expression: "fib = g = f = h = is_optimized = null;" })
+             .then(GC);
 }
 
 function GC() {
   return Protocol.HeapProfiler.enable()
            .then(() => Protocol.HeapProfiler.collectGarbage())
            .then(() => Protocol.HeapProfiler.disable());
 }
 
 function LogSorted(message) {
   message.result.result.sort((a, b) => parseInt(a.scriptId) - parseInt(b.scriptId));
   return InspectorTest.logMessage(message);
 }
 
 InspectorTest.runTestSuite([
   function testPreciseBaseline(next)
   {
     Protocol.Runtime.enable()
       .then(() => Protocol.Runtime.compileScript({ expression: source, sourceURL: "0", persistScript: true }))
       .then((result) => Protocol.Runtime.runScript({ scriptId: result.result.scriptId }))
       .then(GC)
       .then(Protocol.Profiler.enable)
       .then(Protocol.Profiler.startPreciseCoverage)
       .then(Protocol.Profiler.takePreciseCoverage)
       .then(LogSorted)
       .then(Protocol.Profiler.takePreciseCoverage)
       .then(LogSorted)
       .then(Protocol.Profiler.stopPreciseCoverage)
-      .then(ClearAndGC)
       .then(Protocol.Profiler.disable)
       .then(Protocol.Runtime.disable)
+      .then(ClearAndGC)
       .then(next);
   },
   function testPreciseCoverage(next)
   {
     Protocol.Runtime.enable()
       .then(Protocol.Profiler.enable)
       .then(Protocol.Profiler.startPreciseCoverage)
       .then(() => Protocol.Runtime.compileScript({ expression: source, sourceURL: "1", persistScript: true }))
       .then((result) => Protocol.Runtime.runScript({ scriptId: result.result.scriptId }))
       .then(ClearAndGC)
       .then(InspectorTest.logMessage)
       .then(Protocol.Profiler.takePreciseCoverage)
       .then(LogSorted)
       .then(Protocol.Profiler.takePreciseCoverage)
       .then(LogSorted)
-      .then(ClearAndGC)
       .then(Protocol.Profiler.stopPreciseCoverage)
       .then(Protocol.Profiler.disable)
       .then(Protocol.Runtime.disable)
+      .then(ClearAndGC)
       .then(next);
   },
   function testPreciseCoverageFail(next)
   {
     Protocol.Runtime.enable()
       .then(Protocol.Profiler.enable)
       .then(() => Protocol.Runtime.compileScript({ expression: source, sourceURL: "2", persistScript: true }))
       .then((result) => Protocol.Runtime.runScript({ scriptId: result.result.scriptId }))
       .then(InspectorTest.logMessage)
       .then(ClearAndGC)
       .then(Protocol.Profiler.takePreciseCoverage)
       .then(InspectorTest.logMessage)
-      .then(ClearAndGC)
       .then(Protocol.Profiler.disable)
       .then(Protocol.Runtime.disable)
+      .then(ClearAndGC)
       .then(next);
   },
   function testBestEffortCoverage(next)
   {
     Protocol.Runtime.enable()
       .then(() => Protocol.Runtime.compileScript({ expression: source, sourceURL: "3", persistScript: true }))
       .then((result) => Protocol.Runtime.runScript({ scriptId: result.result.scriptId }))
       .then(InspectorTest.logMessage)
       .then(ClearAndGC)
       .then(Protocol.Profiler.getBestEffortCoverage)
       .then(LogSorted)
       .then(Protocol.Profiler.getBestEffortCoverage)
       .then(LogSorted)
+      .then(Protocol.Runtime.disable)
       .then(ClearAndGC)
-      .then(Protocol.Runtime.disable)
       .then(next);
   },
   function testBestEffortCoveragePrecise(next)
   {
     Protocol.Runtime.enable()
       .then(Protocol.Profiler.enable)
       .then(Protocol.Profiler.startPreciseCoverage)
       .then(() => Protocol.Runtime.compileScript({ expression: source, sourceURL: "4", persistScript: true }))
       .then((result) => Protocol.Runtime.runScript({ scriptId: result.result.scriptId }))
       .then(InspectorTest.logMessage)
       .then(ClearAndGC)
       .then(Protocol.Profiler.getBestEffortCoverage)
       .then(LogSorted)
       .then(Protocol.Profiler.getBestEffortCoverage)
       .then(LogSorted)
       .then(ClearAndGC)
       .then(Protocol.Profiler.stopPreciseCoverage)
       .then(Protocol.Profiler.disable)
       .then(Protocol.Runtime.disable)
+      .then(ClearAndGC)
       .then(next);
   },
   function testEnablePreciseCoverageAtPause(next)
   {
     function handleDebuggerPause() {
       Protocol.Profiler.enable()
           .then(Protocol.Profiler.startPreciseCoverage)
           .then(Protocol.Debugger.resume)
     }
     Protocol.Debugger.enable();
     Protocol.Debugger.oncePaused().then(handleDebuggerPause);
     Protocol.Runtime.enable()
       .then(() => Protocol.Runtime.compileScript({ expression: break_source, sourceURL: "5", persistScript: true }))
       .then((result) => Protocol.Runtime.runScript({ scriptId: result.result.scriptId }))
       .then(InspectorTest.logMessage)
       .then(ClearAndGC)
       .then(Protocol.Profiler.takePreciseCoverage)
       .then(LogSorted)
+      .then(ClearAndGC)
+      .then(Protocol.Profiler.stopPreciseCoverage)
+      .then(Protocol.Profiler.disable)
+      .then(Protocol.Runtime.disable)
+      .then(Protocol.Debugger.disable)
+      .then(ClearAndGC)
+      .then(next);
+  },
+  function testPreciseCoverageBinary(next)
+  {
+    Protocol.Runtime.enable()
+      .then(Protocol.Profiler.enable)
+      .then(() => Protocol.Profiler.startPreciseCoverage({binary: true}))
+      .then(() => Protocol.Runtime.compileScript({ expression: source, sourceURL: "6", persistScript: true }))
+      .then((result) => Protocol.Runtime.runScript({ scriptId: result.result.scriptId }))
+      .then(InspectorTest.logMessage)
+      .then(Protocol.Profiler.takePreciseCoverage)
+      .then(LogSorted)
+      .then(() => Protocol.Runtime.evaluate({ expression: "is_optimized(fib)" }))
+      .then(message => InspectorTest.logMessage(message))
+      .then(() => Protocol.Runtime.evaluate({ expression: "fib(20)" }))
+      .then(message => InspectorTest.logMessage(message))
+      .then(() => Protocol.Runtime.evaluate({ expression: "is_optimized(fib)" }))
+      .then(message => InspectorTest.logMessage(message))
+      .then(Protocol.Profiler.takePreciseCoverage)
+      .then(LogSorted)
       .then(Protocol.Profiler.stopPreciseCoverage)
       .then(Protocol.Profiler.disable)
       .then(Protocol.Runtime.disable)
+      .then(ClearAndGC)
       .then(next);
   },
 ]);