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Auto merge of #14864 - servo:timers, r=jdm

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Remove some unsound JSVal handling in JsTimerTask::invoke.

We were using Handles to *copies* of the traced values, rather than the
originals.

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This commit is contained in:
bors-servo 2017-01-05 14:00:50 -08:00 • committed by GitHub
commit c3cf4386b0
1 changed files with 2 additions and 7 deletions
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9
components/script/timers.rs
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@ -483,7 +483,6 @@ fn clamp_duration(nesting_level: u32, unclamped: MsDuration) -> MsDuration {
impl JsTimerTask {
// see https://html.spec.whatwg.org/multipage/#timer-initialisation-steps
#[allow(unsafe_code)]
pub fn invoke<T: DomObject>(self, this: &T, timers: &JsTimers) {
// step 4.1 can be ignored, because we proactively prevent execution
// of this task when its scheduled execution is canceled.
@ -492,7 +491,7 @@ impl JsTimerTask {
timers.nesting_level.set(self.nesting_level);
// step 4.2
match *&self.callback {
match self.callback {
InternalTimerCallback::StringTimerCallback(ref code_str) => {
let global = this.global();
let cx = global.get_cx();
@ -502,11 +501,7 @@ impl JsTimerTask {
code_str, rval.handle_mut());
},
InternalTimerCallback::FunctionTimerCallback(ref function, ref arguments) => {
let arguments: Vec<JSVal> = arguments.iter().map(|arg| arg.get()).collect();
let arguments = arguments.iter().by_ref().map(|arg| unsafe {
HandleValue::from_marked_location(arg)
}).collect();
let arguments = arguments.iter().map(|arg| arg.handle()).collect();
let _ = function.Call_(this, arguments, Report);
},
};