Debugger-onNativeCall-01.js

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// Test that the onNativeCall hook is called when expected.

load(libdir + 'eqArrayHelper.js');

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

var dbg = Debugger(g);

var gdbg = dbg.addDebuggee(g);

g.eval(`

const x = [];

Object.defineProperty(x, "a", {

  get: print,

  set: print,

});

function f() {

  x.a++;

  x.push(4);

`);

for (let i = 0; i < 5; i++) {

  g.f();

const rv = [];

dbg.onNativeCall = (callee, reason) => { rv.push(callee.name, reason); };

var dbg2 = Debugger(g);

var gdbg2 = dbg2.addDebuggee(g);

const fscript = gdbg.getOwnPropertyDescriptor('f').value.script;

for (let i = 0; i < 5; i++) {

  // The onNativeCall hook is called when doing global evaluations.

  rv.length = 0;

  gdbg.executeInGlobal(`f()`);

  assertEqArray(rv, ["print", "get", "print", "set", "push", "call"]);

  // The onNativeCall hook is called when doing frame evaluations.

  let handlerCalled = false;

  const handler = {

    hit(frame) {

      fscript.clearBreakpoint(handler);

      rv.length = 0;

      frame.eval(`f()`);

      assertEqArray(rv, ["print", "get", "print", "set", "push", "call"]);

      handlerCalled = true;

},

};

  fscript.setBreakpoint(fscript.mainOffset, handler);

  g.f();

  assertEq(handlerCalled, true);

  // The onNativeCall hook is also called when not in a debugger evaluation.

  rv.length = 0;

  g.f();

  assertEqArray(rv, ["print", "get", "print", "set", "push", "call"]);

  // The onNativeCall hook is *not* called when in a debugger evaluation

  // associated with a different debugger using exclusiveDebuggerOnEval.

  rv.length = 0;

  dbg2.exclusiveDebuggerOnEval = true;

  assertEq(dbg2.exclusiveDebuggerOnEval, true);

  gdbg2.executeInGlobal(`f()`);

  assertEqArray(rv, []);

  // The onNativeCall hook is called when that same distinct debugger

  // doesn't have the exclusiveDebuggerOnEval flag set to true

  rv.length = 0;

  dbg2.exclusiveDebuggerOnEval = false;

  assertEq(dbg2.exclusiveDebuggerOnEval, false);

  gdbg2.executeInGlobal(`f()`);

  assertEqArray(rv, ["print", "get", "print", "set", "push", "call"]);