| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License.. |
| |
| //! Runtime services |
| |
| #![allow(unused_macros)] |
| |
| use crate::enclave; |
| use crate::slice; |
| use crate::str; |
| use crate::sync::Once; |
| use crate::sync::SgxSpinlock; |
| use crate::thread; |
| use sgx_trts::enclave::rsgx_is_supported_EDMM; |
| use sgx_types::{sgx_enclave_id_t, sgx_thread_t, SGX_THREAD_T_NULL}; |
| |
| // Re-export some of our utilities which are expected by other crates. |
| pub use crate::panicking::{begin_panic, panic_count}; |
| pub use crate::sys_common::at_exit; |
| pub use core::panicking::{panic_display, panic_fmt}; |
| |
| // Prints to the "panic output", depending on the platform this may be: |
| // - the standard error output |
| // - some dedicated platform specific output |
| // - nothing (so this macro is a no-op) |
| macro_rules! rtprintpanic { |
| ($($t:tt)*) => { |
| if let Some(mut out) = crate::sys::stdio::panic_output() { |
| let _ = crate::io::Write::write_fmt(&mut out, format_args!($($t)*)); |
| } |
| } |
| } |
| |
| macro_rules! rtabort { |
| ($($t:tt)*) => { |
| { |
| rtprintpanic!("fatal runtime error: {}\n", format_args!($($t)*)); |
| crate::sys::abort_internal(); |
| } |
| } |
| } |
| |
| macro_rules! rtassert { |
| ($e:expr) => { |
| if !$e { |
| rtabort!(concat!("assertion failed: ", stringify!($e))); |
| } |
| }; |
| } |
| |
| macro_rules! rtunwrap { |
| ($ok:ident, $e:expr) => { |
| match $e { |
| $ok(v) => v, |
| ref err => { |
| let err = err.as_ref().map(drop); // map Ok/Some which might not be Debug |
| rtabort!(concat!("unwrap failed: ", stringify!($e), " = {:?}"), err) |
| } |
| } |
| }; |
| } |
| |
| static INIT: Once = Once::new(); |
| static EXIT: Once = Once::new(); |
| static GLOBAL_INIT_LOCK: SgxSpinlock = SgxSpinlock::new(); |
| static mut INIT_TCS: sgx_thread_t = SGX_THREAD_T_NULL; |
| |
| #[no_mangle] |
| pub extern "C" fn t_global_exit_ecall() { |
| extern "C" { |
| fn uninit_global_object(); |
| } |
| |
| GLOBAL_INIT_LOCK.lock(); |
| EXIT.call_once(|| unsafe { |
| if INIT_TCS == thread::rsgx_thread_self() && !rsgx_is_supported_EDMM() { |
| uninit_global_object(); |
| } |
| }); |
| } |
| |
| #[no_mangle] |
| pub extern "C" fn t_global_init_ecall(id: u64, path: *const u8, len: usize) { |
| if path.is_null() { |
| return; |
| } |
| |
| GLOBAL_INIT_LOCK.lock(); |
| unsafe { INIT_TCS = thread::rsgx_thread_self() }; |
| |
| INIT.call_once(|| { |
| enclave::set_enclave_id(id as sgx_enclave_id_t); |
| let s = unsafe { |
| let str_slice = slice::from_raw_parts(path, len); |
| str::from_utf8_unchecked(str_slice) |
| }; |
| enclave::set_enclave_path(s); |
| }); |
| } |
| |
| global_dtors_object! { |
| GLOBAL_DTORS, global_exit = { cleanup(); } |
| } |
| |
| // One-time runtime cleanup. |
| // NOTE: this is not guaranteed to run, for example when the program aborts. |
| fn cleanup() { |
| static CLEANUP: Once = Once::new(); |
| CLEANUP.call_once(|| { |
| // Flush stdout and disable buffering. |
| #[cfg(feature = "stdio")] |
| crate::io::cleanup(); |
| |
| crate::sys_common::at_exit_imp::cleanup(); |
| }); |
| } |