1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
// 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.. use crate::trts; use core::sync::atomic::{AtomicPtr, Ordering}; use core::mem; use core::alloc::AllocErr; static SGX_OOM_HANDLER: AtomicPtr<()> = AtomicPtr::new(default_oom_handler as *mut ()); #[allow(clippy::needless_pass_by_value)] fn default_oom_handler( _err: AllocErr) -> ! { trts::rsgx_abort() } pub fn rsgx_oom(err: AllocErr) -> ! { let value = SGX_OOM_HANDLER.load(Ordering::SeqCst); let handler: fn(AllocErr) -> ! = unsafe { mem::transmute(value) }; handler(err); } /// 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(AllocErr) -> !) { SGX_OOM_HANDLER.store(handler as *mut (), Ordering::SeqCst); }