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// Test that SavedFrame.prototype.toString only shows frames whose principal is
// subsumed by the caller's principal.
var count = 0;
// Given a string of letters |expected|, say "abc", assert that the stack
// contains calls to a series of functions named by the next letter from
// the string, say a, b, and then c. Younger frames appear earlier in
// |expected| than older frames.
function check(expected, stack) {
print("check(" + JSON.stringify(expected) + ") against:\n" + stack);
count++;
// Extract only the function names from the stack trace. Omit the frames
// for the top-level evaluation, if it is present.
const frames = stack
.split("\n")
.filter(f => f.match(/^.@/))
.map(f => f.replace(/@.*$/g, ""));
// Check the function names against the expected sequence.
assertEq(frames.length, expected.length);
for (var i = 0; i < expected.length; i++) {
assertEq(frames[i], expected[i]);
}
}
var low = newGlobal({ principal: 0 });
var mid = newGlobal({ principal: 0xffff });
var high = newGlobal({ principal: 0xfffff });
eval('function a() { check("a", saveStack().toString()); b(); }');
low .eval('function b() { check("b", saveStack().toString()); c(); }');
mid .eval('function c() { check("cba", saveStack().toString()); d(); }');
high.eval('function d() { check("dcba", saveStack().toString()); e(); }');
eval('function e() { check("ecba", saveStack().toString()); f(); }');
low .eval('function f() { check("fb", saveStack().toString()); g(); }');
mid .eval('function g() { check("gfecba", saveStack().toString()); h(); }');
high.eval('function h() { check("hgfedcba", saveStack().toString()); }');
// Make everyone's functions visible to each other, as needed.
b = low .b;
low .c = mid .c;
mid .d = high.d;
high.e = e;
f = low .f;
low .g = mid .g;
mid .h = high.h;
low.check = mid.check = high.check = check;
// Kick the whole process off.
a();
assertEq(count, 8);
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