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// Test that the onNativeCall hook can control the call's behavior.
var g = newGlobal({newCompartment: true});
var dbg = Debugger(g);
var gdbg = dbg.addDebuggee(g);
g.eval(`
var x = [];
Object.defineProperty(x, "a", {
get: print,
set: print,
});
var rv;
function f() {
x.a++;
try {
rv = x.push(4);
} catch (e) {
throw "rethrowing";
}
}
`);
for (let i = 0; i < 5; i++) {
g.f();
}
for (let i = 0; i < 5; i++) {
// Test terminating execution.
dbg.onNativeCall = (callee, reason) => {
return null;
};
const len = g.x.length;
let v = gdbg.executeInGlobal(`f()`);
assertEq(v, null);
assertEq(g.x.length, len);
// Test throwing an exception.
dbg.onNativeCall = (callee, reason) => {
return { throw: "throwing" };
};
v = gdbg.executeInGlobal(`f()`);
assertEq(v.throw, "throwing");
// Test throwing an exception #2.
dbg.onNativeCall = (callee, reason) => {
if (callee.name == "push") {
return { throw: "throwing" };
}
};
v = gdbg.executeInGlobal(`f()`);
assertEq(v.throw, "rethrowing");
// Test returning a different value from the native.
dbg.onNativeCall = (callee, reason) => {
return { return: "value" };
};
v = gdbg.executeInGlobal(`f()`);
assertEq(v.return, undefined);
assertEq(g.rv, "value");
}