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timers: check can_call_into_js in Immediates #21057

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timers: check can_call_into_js in Immediates #21057

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timers: check can_call_into_js in Immediates
apapirovski May 31, 2018
8e7e42b
fixup: addaleax feedback
apapirovski May 31, 2018
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4 changes: 2 additions & 2 deletions src/env.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -457,7 +457,7 @@ void Environment::RunAndClearNativeImmediates() {
void Environment::CheckImmediate(uv_check_t* handle) {
Environment* env = Environment::from_immediate_check_handle(handle);

if (env->immediate_info()->count() == 0)
if (env->immediate_info()->count() == 0 || !env->can_call_into_js())
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I think this should be right before the do {, because we probably want our native immediate callbacks to still be called – not all of them are calling JS, some or doing cleanup rather than something else

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Would that be strictly correct even if it's not calling JS? At least in relation to the main thread (and not workers), the expectation was that no user code would run after EmitExit finishes. After RunCleanup was added that's no longer the case since we run the loop one final time.

Are there are any Immediates that we truly want to have run at this point?

return;

HandleScope scope(env->isolate());
Expand All @@ -472,7 +472,7 @@ void Environment::CheckImmediate(uv_check_t* handle) {
0,
nullptr,
{0, 0}).ToLocalChecked();
} while (env->immediate_info()->has_outstanding());
} while (env->immediate_info()->has_outstanding() && env->can_call_into_js());

if (env->immediate_info()->ref_count() == 0)
env->ToggleImmediateRef(false);
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