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Bug 914325 - Leave ourselves some room to make the call into chrome. r=luke

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Bobby Holley 2013-09-11 15:24:09 -07:00
parent fce1f0b95b
commit 49e92d12a3
1 changed files with 10 additions and 3 deletions
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13
js/xpconnect/tests/chrome/test_bug732665.xul
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@ -59,10 +59,17 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=732665
ok(chromeLimit >= contentLimit + 10,
"Chrome should be able to have at least 10 heavy frames more stack than content: " + chromeLimit + ", " + contentLimit);
// Exhaust the stack space in content, and then make sure we can still get 10 heavy frames in chrome.
// Exhaust the stack space in content, and then make sure we can still get 10
// heavy frames in chrome.
//
// Note that sometimes, if we pass |0| to nearNativeStackLimit, we can end up
// so close to the border in content that we can't even get ourselves together
// enough to make the cross-compartment call. So rather than exhausting the
// stack entirely and then checking for 10 chrome frames, we leave ourselves
// one frame's worth, and check for 11.
contentSb.nnslChrome = chromeSb.nearNativeStackLimit;
var nestedLimit = Cu.evalInSandbox("nearNativeStackLimit(0, function() { nestedLimit = nnslChrome(0);}); nestedLimit;", contentSb);
ok(nestedLimit >= 10, "Chrome should be invokable from content script with an exhausted stack: " + nestedLimit);
var nestedLimit = Cu.evalInSandbox("nearNativeStackLimit(1, function() { nestedLimit = nnslChrome(0);}); nestedLimit;", contentSb);
ok(nestedLimit >= 11, "Chrome should be invokable from content script with an exhausted stack: " + nestedLimit);
]]>
</script>