1b1f1c7786
...with more fixes. The original patch was reverted in3e9cc543f2due to bot failures caused by a missing dependence on librt. That issue was fixed in32d8d23cd0, but that commit also broke sanitizer bots due to a bug in SimplePackedSerialization: empty ArrayRef<char>s triggered a zero-byte memcpy from a null source. The ArrayRef<char> serialization issue was fixed in67220c2ad7, and this patch has also been updated with a new custom SharedMemorySegFinalizeRequest message that should avoid serializing empty ArrayRefs in the first place. https://reviews.llvm.org/D128544