Fuzz waitqueue instructions - #9012
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Part of #8315. Generate
waitqueue.new,waitqueue.notify, andstruct.waitin the fuzzer.When
!ATOMIC_WAITS, the timeout argument on allstruct.waits is forced to be equal to 0 so that programs can't block. In this case it will return either 1 (not equal) or 2 (equal and timed out waiting), but never 0 (blocked and got notified).Ran for 26k iterations with no issues. For fuzzing against V8:
shared-everythingis already disabled when fuzzing against V8: link. Waitqueues are mostly implemented in V8 but currently only support i32 control words and not i64 or subtypes of eqref: https://chromium-review.googlesource.com/c/v8/v8/+/8449412/2.