| // 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.. |
| |
| #![cfg_attr(not(target_env = "sgx"), no_std)] |
| #![cfg_attr( |
| all(target_env = "sgx", target_vendor = "mesalock"), |
| feature(rustc_private) |
| )] |
| |
| #[cfg(not(target_env = "sgx"))] |
| #[macro_use] |
| extern crate sgx_tstd as std; |
| |
| #[cfg(not(target_env = "sgx"))] |
| use std::prelude::v1::*; |
| |
| #[cfg(target_env = "sgx")] |
| extern crate profiler_builtins as _; |
| |
| extern crate sgx_rand; |
| extern crate sgx_types; |
| |
| use lazy_static::lazy_static; |
| use sgx_rand::Rng; |
| use sgx_types::{c_char, c_int}; |
| use std::ffi::CStr; |
| use std::io::Write; |
| use std::os::unix::io::{FromRawFd, IntoRawFd}; |
| use std::slice; |
| use std::sync::{Once, SgxMutex}; |
| use std::untrusted::fs::{copy, File, OpenOptions}; |
| |
| static INIT: Once = Once::new(); |
| |
| lazy_static! { |
| static ref GCDA_FILE: SgxMutex<c_int> = SgxMutex::new(-1); |
| static ref WROUT_FNS: SgxMutex<Vec<extern "C" fn()>> = SgxMutex::new(Vec::new()); |
| static ref RND: SgxMutex<u32> = SgxMutex::new(0); |
| } |
| |
| pub fn cov_writeout() { |
| for f in WROUT_FNS.lock().unwrap().iter() { |
| f(); |
| } |
| } |
| |
| #[no_mangle] |
| pub extern "C" fn llvm_gcov_init(writeout: extern "C" fn(), _flush: extern "C" fn()) { |
| INIT.call_once(|| { |
| let mut rng = sgx_rand::thread_rng(); |
| let mut rnd = RND.lock().unwrap(); |
| *rnd = rng.gen(); |
| }); |
| let mut writeout_fns = WROUT_FNS.lock().unwrap(); |
| writeout_fns.push(writeout); |
| } |
| |
| #[no_mangle] |
| pub extern "C" fn llvm_gcda_summary_info() { |
| match GCDA_FILE.lock() { |
| Ok(fd) => { |
| let mut file = unsafe { File::from_raw_fd(*fd) }; |
| |
| let summary_tag: u32 = 0xa1; |
| file.write_all(&summary_tag.to_be_bytes()).unwrap(); |
| let len: u32 = 9; |
| file.write_all(&len.to_le_bytes()).unwrap(); |
| let zero: u32 = 0; |
| let one: u32 = 1; |
| file.write_all(&zero.to_le_bytes()).unwrap(); |
| file.write_all(&zero.to_le_bytes()).unwrap(); |
| file.write_all(&one.to_le_bytes()).unwrap(); |
| for _ in 0..(len - 3) { |
| file.write_all(&zero.to_le_bytes()).unwrap(); |
| } |
| let prog_tag: u32 = 0xa3; |
| file.write_all(&prog_tag.to_be_bytes()).unwrap(); |
| file.write_all(&zero.to_le_bytes()).unwrap(); |
| |
| // Prevent it from drop |
| let _ = file.into_raw_fd(); |
| } |
| Err(_) => panic!("llvm_gcda_emit_arcs failed"), |
| } |
| } |
| |
| #[no_mangle] |
| pub extern "C" fn llvm_gcda_emit_arcs(num_counters: u32, counters: *const u64) { |
| let cnts = unsafe { slice::from_raw_parts(counters, num_counters as usize) }; |
| match GCDA_FILE.lock() { |
| Ok(fd) => { |
| let mut file = unsafe { File::from_raw_fd(*fd) }; |
| |
| let arcs_tag: u32 = 0xa101; |
| file.write_all(&arcs_tag.to_be_bytes()).unwrap(); |
| let len: u32 = num_counters * 2; |
| file.write_all(&len.to_le_bytes()).unwrap(); |
| for i in 0..num_counters { |
| file.write_all(&cnts[i as usize].to_le_bytes()).unwrap(); |
| } |
| |
| // Prevent it from drop |
| let _ = file.into_raw_fd(); |
| } |
| Err(_) => panic!("llvm_gcda_emit_arcs failed"), |
| } |
| } |
| |
| #[no_mangle] |
| pub extern "C" fn llvm_gcda_emit_function( |
| ident: u32, |
| raw_func_name: *const c_char, |
| fchecksum: u32, |
| use_extra_checksum: u8, |
| cfg_checksum: u32, |
| ) { |
| let func_name_str: &CStr = unsafe { CStr::from_ptr(raw_func_name) }; |
| let func_name = func_name_str.to_str().unwrap(); |
| let mut len: u32 = 2; |
| if use_extra_checksum != 0 { |
| len += 1; |
| } |
| let str_len = (1 + func_name.len() / 4) as u32; |
| len += str_len; |
| |
| match GCDA_FILE.lock() { |
| Ok(fd) => { |
| let mut file = unsafe { File::from_raw_fd(*fd) }; |
| |
| let func_tag: u32 = 1; |
| file.write_all(&func_tag.to_be_bytes()).unwrap(); |
| file.write_all(&len.to_le_bytes()).unwrap(); |
| file.write_all(&ident.to_le_bytes()).unwrap(); |
| file.write_all(&fchecksum.to_le_bytes()).unwrap(); |
| if use_extra_checksum != 0 { |
| file.write_all(&cfg_checksum.to_le_bytes()).unwrap(); |
| } |
| file.write_all(&str_len.to_le_bytes()).unwrap(); |
| file.write_all(func_name.as_bytes()).unwrap(); |
| |
| let zero: u8 = 0; |
| let padding_size = 4 - func_name.len() % 4; |
| for _ in 0..padding_size { |
| file.write_all(&zero.to_le_bytes()).unwrap(); |
| } |
| |
| // Prevent it from drop |
| let _ = file.into_raw_fd(); |
| } |
| Err(_) => panic!("llvm_gcda_emit_function failed"), |
| } |
| } |
| |
| #[no_mangle] |
| pub extern "C" fn llvm_gcda_start_file( |
| raw_file_name: *const c_char, |
| ver: *const u8, |
| checksum: u32, |
| ) { |
| let file_name_str: &CStr = unsafe { CStr::from_ptr(raw_file_name) }; |
| let file_name = file_name_str.to_str().unwrap(); |
| let version = unsafe { slice::from_raw_parts(ver, 4) }; |
| |
| let mut prefix = String::from(file_name); |
| prefix.truncate(file_name.len() - 5); |
| let orig_gcno_name = format!("{}.gcno", prefix); |
| let rnd = RND.lock().unwrap(); |
| let new_gcno_name = format!("{}.{:08x}.gcno", prefix, *rnd); |
| let new_gcda_name = format!("{}.{:08x}.gcda", prefix, *rnd); |
| |
| match GCDA_FILE.lock() { |
| Ok(mut fd) => { |
| copy(orig_gcno_name, new_gcno_name).unwrap(); |
| let mut file = match OpenOptions::new() |
| .write(true) |
| .append(false) |
| .open(&new_gcda_name) |
| { |
| Ok(file) => file, |
| Err(_) => File::create(&new_gcda_name).unwrap(), |
| }; |
| file.write_all(b"adcg").unwrap(); |
| file.write_all(version).unwrap(); |
| file.write_all(&checksum.to_le_bytes()).unwrap(); |
| *fd = file.into_raw_fd(); |
| } |
| Err(_) => panic!("llvm_gcda_start_file failed!"), |
| } |
| } |
| |
| #[no_mangle] |
| pub extern "C" fn llvm_gcda_end_file() { |
| match GCDA_FILE.lock() { |
| Ok(fd) => { |
| let mut file = unsafe { File::from_raw_fd(*fd) }; |
| let eof: u64 = 0; |
| file.write_all(&eof.to_be_bytes()).unwrap(); |
| // Let it drop |
| } |
| Err(_) => panic!("llvm_gcda_end_file failed!"), |
| } |
| } |