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async_hooks: proper id stacking for Promises #13585

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merged 1 commit into from
Jun 16, 2017

Commits on Jun 16, 2017

  1. async_hooks: proper id stacking for Promises

    Until now, the async_hooks PromiseHook did not register the Promise’s
    async id and trigger id on the id stack, so inside the `.then()` handler
    those ids would be invalid.
    
    To fix this, add push and pop calls to its `before` and `after` parts,
    respectively. Some care needs to be taken for the cases that the
    Promise hook is being disabled or enabled during the execution
    of a Promise handler; in the former case, actually removing the hook
    is delayed by adding another task to the microtask queue, in the latter
    case popping the id off the async id stack is skipped if the ids don’t
    match.
    
    Fixes: nodejs#13583
    PR-URL: nodejs#13585
    Reviewed-By: Trevor Norris <trevnorris@gmail.com>
    addaleax committed Jun 16, 2017
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