worker: keep allocators for transferred SAB instances alive longer
Keep the ArrayBuffer::Allocator
behind a SharedArrayBuffer
instance
alive for at least as long as the receiving Isolate lives, if the
SharedArrayBuffer
instance isn’t already destroyed through GC.
This is to work around the fact that V8 7.9 started refactoring
how backing stores for SharedArrayBuffer
instances work, changing
the timing of the call that releases the backing store to be
during Isolate disposal.
The flag added to the test is optional but helps verify that the backing store is actually free’d at the end of the test and does not leak memory.
Fixes: https://github.com/nodejs/node-v8/issues/115
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
commit message follows commit guidelines