dom/bindings/test/test_throwing_method_noDCE.html@6474c204b198
dom/bindings/test/test_throwing_method_noDCE.html
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 <!DOCTYPE html>
2 <meta charset=utf-8>
3 <title>Test that we don't DCE functions that can throw</title>
4 <script src="/resources/testharness.js"></script>
5 <script src="/resources/testharnessreport.js"></script>
6 <div id="log"></div>
7 <script>
8 test(function() {
9 function test(root) {
10 var threw = false;
11 try {
12 root.querySelectorAll("");
13 } catch(e){ threw = true; };
14 // Hot loop to make sure the JIT heuristics ion-compile this function even
15 // though it's throwing exceptions (which would normally make us back off
16 // of ion compilation).
17 for (var i=0; i<1500; i++) {}
18 return threw;
19 }
21 var threw = false;
22 var el = document.createElement("div");
23 for (var i=0; i<200; i++)
24 threw = test(el);
25 assert_true(threw);
26 }, "Shouldn't optimize away throwing functions");
27 </script>
