| // 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(" + uneval(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); |
| |