Debugger-onNativeCall-06.js

Enable keyboard shortcuts

// Test that the onNativeCall hook is called when native function is

// called inside self-hosted JS.

load(libdir + 'eqArrayHelper.js');

var g = newGlobal({ newCompartment: true });

var dbg = new Debugger();

var gdbg = dbg.addDebuggee(g);

let rv = [];

dbg.onNativeCall = (callee, reason) => {

  rv.push(callee.name);

};

gdbg.executeInGlobal(`

// Built-in native function.

[1, 2, 3].map(Array.prototype.push, Array.prototype);

// Self-hosted function.

[1, 2, 3].map(String.prototype.padStart, "");

// Other native function.

[1, 2, 3].map(dateNow);

// Self-hosted function called internally.

"abc".match(/a./);

`);

assertEqArray(rv, [

  "map", "get [Symbol.species]", "push", "push", "push",

  "map", "get [Symbol.species]", "padStart", "padStart", "padStart",

  "map", "get [Symbol.species]", "dateNow", "dateNow", "dateNow",

  "match", "[Symbol.match]",

]);

rv = [];

gdbg.executeInGlobal(`

// Nested getters called internally inside self-hosted.

const r = /a./;

r.foo = 10;

"abc".match(r);

// Setter inside self-hosted JS.

// Hook "A.length = k" in Array.from.

var ctor = function() {

  let obj = {};

  Object.defineProperty(obj, "length", { set: Array.prototype.join });

  return obj;

};

var a = [1, 2, 3];

a[Symbol.iterator] = null;

void Array.from.call(ctor, a);

`);

assertEqArray(rv, [

  "match", "[Symbol.match]",

  "get flags",

  "get hasIndices", "get global", "get ignoreCase", "get multiline",

  "get dotAll", "get unicode", "get unicodeSets", "get sticky",

  "call", "from", "defineProperty", "join",

]);

rv = [];

gdbg.executeInGlobal(`

var origExec = RegExp.prototype.exec;

RegExp.prototype.exec = dateNow;

try {

  (/a.b/).test("abc");

} catch (e) {} // Throws not-object-or-null.

RegExp.prototype.exec = origExec;

`);

assertEqArray(rv, ["test", "dateNow"]);