| // Copyright (c) 2017 Baidu, Inc. All Rights Reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions |
| // are met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in |
| // the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Baidu, Inc., nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| use core::sync::atomic::{AtomicPtr, Ordering}; |
| use core::mem; |
| |
| static SGX_OOM_HANDLER: AtomicPtr<()> = AtomicPtr::new(default_oom_handler as * mut ()); |
| |
| #[allow(unused_variables)] |
| fn default_oom_handler() -> ! { |
| |
| panic!("enclave allocate memory failed."); |
| } |
| |
| pub fn rsgx_oom() -> ! { |
| |
| let value = SGX_OOM_HANDLER.load(Ordering::SeqCst); |
| let handler: fn() -> ! = unsafe { mem::transmute(value) }; |
| handler(); |
| } |
| |
| /// Set a custom handler for out-of-memory conditions |
| /// |
| /// To avoid recursive OOM failures, it is critical that the OOM handler does |
| /// not allocate any memory itself. |
| pub fn set_panic_handler(handler: fn() -> !) { |
| |
| SGX_OOM_HANDLER.store(handler as * mut (), Ordering::SeqCst); |
| } |