onExceptionUnwind-16.js

Enable keyboard shortcuts

// Test behavior of isInCatchScope on frame from loop iterator

load(libdir + "asserts.js");

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

var dbg = Debugger(g);

var hit = false;

dbg.onExceptionUnwind = function (frame, exc) {

    // onExceptionUnwind is called multiple times as the stack is unwound.

    // Only check the first hit.

    assertEq(frame instanceof Debugger.Frame, true);

    assertEq(exc, 16);

    if (!hit) {

        hit = true;

            assertEq(frame.type, "call");

            assertEq(frame.callee.name, "foo");

            assertEq(frame.older.type, "call");

            const { lineNumber, columnNumber } = frame.script.getOffsetMetadata(frame.offset);

            assertEq(lineNumber, 3);

            assertEq(columnNumber, 5);

            const isInCatchScope = frame.script.isInCatchScope(frame.offset);

            assertEq(isInCatchScope, false);

            const { older } = frame;

            assertEq(older.type, "call");

            assertEq(older.callee.name, "f");

            assertEq(older.type, "call");

            const { lineNumber, columnNumber } = older.script.getOffsetMetadata(older.offset);

            assertEq(lineNumber, 7);

            assertEq(columnNumber, 5);

            const isInCatchScope = older.script.isInCatchScope(older.offset);

            assertEq(isInCatchScope, false);

};

g.eval(

`function f() {

  function foo() {

    throw 16; // <= first frame on exception is here

  for (const _ of [1]) {

    foo(); // <= second frame, "older" is here

`);

assertThrowsValue(function () { g.eval("f();"); }, 16);

assertEq(hit, true);