| // 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)] |
| |
| // 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}; |
| |
| use crate::enclave::Enclave; |
| use crate::ffi::CString; |
| use crate::slice; |
| use crate::str; |
| use crate::sync::Once; |
| use crate::sys; |
| |
| // 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) |
| #[cfg(feature = "stdio")] |
| 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)*)); |
| } |
| } |
| } |
| |
| #[cfg(not(feature = "stdio"))] |
| macro_rules! rtprintpanic { |
| ($($t:tt)*) => { |
| 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) |
| } |
| } |
| }; |
| } |
| |
| macro_rules! should_panic { |
| ($fmt:expr) => {{ |
| match crate::panic::catch_unwind(crate::panic::AssertUnwindSafe(|| $fmt)).is_err() { |
| true => {} |
| false => crate::rt::begin_panic($fmt), |
| } |
| }}; |
| } |
| |
| macro_rules! global_ctors_object { |
| ($var_name:ident, $func_name:ident = $func:block) => { |
| cfg_if! { |
| if #[cfg(target_os = "linux")] { |
| #[link_section = ".init_array"] |
| #[no_mangle] |
| pub static $var_name: fn() = $func_name; |
| } else if #[cfg(target_os = "windows")] { |
| #[no_mangle] |
| pub static $var_name: fn() = $func_name; |
| } else if #[cfg(target_os = "macos")] { |
| #[no_mangle] |
| pub static $var_name: fn() = $func_name; |
| } else { |
| |
| } |
| } |
| #[no_mangle] |
| pub fn $func_name() { |
| { |
| $func |
| }; |
| } |
| }; |
| } |
| |
| macro_rules! global_dtors_object { |
| ($var_name:ident, $func_name:ident = $func:block) => { |
| cfg_if! { |
| if #[cfg(target_os = "linux")] { |
| #[link_section = ".fini_array"] |
| #[no_mangle] |
| pub static $var_name: fn() = $func_name; |
| } else if #[cfg(target_os = "windows")] { |
| #[no_mangle] |
| pub static $var_name: fn() = $func_name; |
| } else if #[cfg(target_os = "macos")] { |
| #[no_mangle] |
| pub static $var_name: fn() = $func_name; |
| } else { |
| |
| } |
| } |
| #[no_mangle] |
| pub fn $func_name() { |
| { |
| $func |
| }; |
| } |
| }; |
| } |
| |
| static INIT: Once = Once::new(); |
| static EXIT: Once = Once::new(); |
| |
| #[allow(unused_variables)] |
| #[no_mangle] |
| unsafe extern "C" fn global_init_ecall( |
| eid: u64, |
| path: *const u8, |
| path_len: usize, |
| env: *const u8, |
| env_len: usize, |
| args: *const u8, |
| args_len: usize, |
| ) { |
| INIT.call_once(|| { |
| if eid > 0 { |
| Enclave::set_id(eid); |
| } |
| if !path.is_null() && path_len > 0 { |
| if let Ok(s) = str::from_utf8(slice::from_raw_parts(path, path_len)) { |
| Enclave::set_path_unchecked(s); |
| } |
| } |
| |
| let parse_vec = |ptr: *const u8, len: usize| -> Vec<CString> { |
| if !ptr.is_null() && len > 0 { |
| let buf = slice::from_raw_parts(ptr, len); |
| buf.split(|&c| c == 0) |
| .filter_map(|bytes| { |
| if !bytes.is_empty() { |
| CString::new(bytes).ok() |
| } else { |
| None |
| } |
| }) |
| .collect() |
| } else { |
| Vec::new() |
| } |
| }; |
| |
| cfg_if! { |
| if #[cfg(feature = "env")] { |
| let env = parse_vec(env, env_len); |
| let args = parse_vec(args, args_len); |
| } else { |
| let env = parse_vec(crate::ptr::null(), 0); |
| let args = parse_vec(crate::ptr::null(), 0); |
| } |
| } |
| sys::init(env, args); |
| }); |
| } |
| |
| #[no_mangle] |
| unsafe extern "C" fn global_exit_ecall() {} |
| |
| global_dtors_object! { |
| GLOBAL_DTORS, global_dtors = { |
| let _ = crate::panic::catch_unwind(cleanup); |
| } |
| } |
| |
| // One-time runtime cleanup. |
| // NOTE: this is not guaranteed to run, for example when the program aborts. |
| pub (crate) 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(); |
| // SAFETY: Only called once during runtime cleanup. |
| unsafe { sys::cleanup() }; |
| }); |
| } |