1782507 - Pin fuzzing to newly created actors in IPC fuzzing

Status: RESOLVED FIXED

(Core :: Fuzzing, enhancement)

Description

[Christian Holler (:decoder)]

Currently, the fuzzer sometimes creates new actors as expected (just by sending a constructor message with the right parameters). However, once the actor is successfully created, there is no special handling for that new actor. In particular, the chance that it is selected for further messages is not higher than it is for any other actor.

We should change the code to pin the fuzzing to the newly created actor at least for a certain amount of messages. After these messages have been sent, we should decide if we want to stay pinned on that particular port (since it's more likely that more messages on the same port where the new actor was created could trigger a bug).

Comment 1

[Christian Holler (:decoder)]

Attachment: Bug 1782507 - Pin IPC fuzzing to new actor / last port after constructor. r?truber

Depends on D153344

Comment 2

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

Pin IPC fuzzing to new actor / last port after constructor. r=truber
https://hg.mozilla.org/integration/autoland/rev/111a081318aee284b38a18a3b7ed6d11882dd34c
https://hg.mozilla.org/mozilla-central/rev/111a081318ae