SGX implementation is broken

[mzohreva]

When running cargo test --target x86_64-fortanix-unknown-sgx on an SGX-capable machine, I either get a segfault or a test hanging indefinitely, e.g.

$ git status 
HEAD detached at 0.12.1
$ cargo t --target x86_64-fortanix-unknown-sgx
warning: unused return value of `Box::<T>::from_raw` that must be used
   --> core/src/parking_lot.rs:251:17
    |
251 |                 Box::from_raw(new_table);
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: call `drop(from_raw(ptr))` if you intend to drop the `Box`
    = note: `#[warn(unused_must_use)]` on by default

warning: `parking_lot_core` (lib) generated 1 warning
    Finished test [unoptimized + debuginfo] target(s) in 0.03s
     Running unittests src/lib.rs (target/x86_64-fortanix-unknown-sgx/debug/deps/parking_lot-4edebee113afb83b)

running 86 tests
test condvar::tests::notify_all ... ok
test condvar::tests::notify_all_return ... ok
test condvar::tests::notify_one ... ok
test condvar::tests::notify_one_return_false ... ok
test condvar::tests::notify_one_return_true ... ok
test condvar::tests::smoke ... ok
test condvar::tests::test_condvar_requeue ... ok
test condvar::tests::test_debug_condvar ... ok
test condvar::tests::test_issue_129 ... FAILED
test condvar::tests::two_mutexes - should panic ... ok
test condvar::tests::two_mutexes_disjoint ... FAILED
test condvar::tests::wait_for ... FAILED
test condvar::tests::wait_until ... FAILED
test condvar::tests::wait_while_until_internal ... ok
test condvar::tests::wait_while_until_internal_does_not_wait_if_initially_false ... ok
test condvar::tests::wait_while_until_internal_times_out_before_false ... FAILED
test condvar::webkit_queue_test::new_test_without_timeout_5 ... ERROR: while running "ftxsgx-runner" "/tmp/parking_lot/target/x86_64-fortanix-unknown-sgx/debug/deps/parking_lot-4edebee113afb83b.sgxs" got signal: 11
error: test failed, to rerun pass `--lib`

Caused by:
  process didn't exit successfully: `ftxsgx-runner-cargo /tmp/parking_lot/target/x86_64-fortanix-unknown-sgx/debug/deps/parking_lot-4edebee113afb83b` (exit status: 1)

Testing 0.8.0 (first version where SGX implementation is included) gives similar result.
Some additional details:

$ rustc -V
rustc 1.66.0-nightly (81f391930 2022-10-09)

cc @jethrogb and @faern

[Amanieu]

I don't have an SGX-capable machine to test this.