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Assert against permanently-leaked rule nodes.
MozReview-Commit-ID: CK5iEWWHFSr
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2 changed files with 8 additions and 3 deletions
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@ -122,6 +122,11 @@ impl RuleTree {
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self.root.clone()
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}
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/// Returns true if there are no nodes in the tree aside from the rule node.
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pub fn is_empty(&self) -> bool {
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self.root.get().first_child.load(Ordering::Relaxed).is_null()
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}
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fn dump<W: Write>(&self, guards: &StylesheetGuards, writer: &mut W) {
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let _ = writeln!(writer, " + RuleTree");
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self.root.get().dump(guards, writer, 0);
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@ -1283,10 +1283,10 @@ impl Drop for Stylist {
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// dropped all strong rule node references before now, then we will
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// leak them, since there will be no way to call gc() on the rule tree
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// after this point.
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//
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// TODO(emilio): We can at least assert all the elements in the free
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// list are indeed free.
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unsafe { self.rule_tree.gc(); }
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// Assert against leaks.
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debug_assert!(self.rule_tree.is_empty());
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}
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}
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