1/*
2 * Copyright (c) 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16//! panic handler for Rust.
17#![feature(rustc_private)]
18extern crate hisysevent;
19extern crate libc;
20extern crate stacktrace_rust;
21use std::ffi::CString;
22use std::fs;
23use std::os::raw::{c_char};
24use std::panic;
25use std::panic::PanicInfo;
26use std::process;
27use std::time::{UNIX_EPOCH, SystemTime};
28use hilog_rust::{error, hilog, HiLogLabel, LogType};
29use hisysevent::{EventType};
30
31const LOG_LABEL: HiLogLabel = HiLogLabel {
32    log_type: LogType::LogCore,
33    domain: 0xD002D11,
34    tag: "DfxFaultLogger"
35};
36
37/// panic handler
38fn panic_handler() {
39    panic::set_hook(Box::new(move |info| {
40        report_info_handler(info)
41    }));
42}
43
44fn read_process_name(pid: u32) -> String {
45    let path = format!("/proc/{}/cmdline", pid);
46    let binding = fs::read_to_string(path).unwrap();
47    let mut process_name = binding.as_str();
48    if process_name.find('\0').is_some() {
49        (process_name, _) = process_name.split_at(process_name.find('\0').unwrap());
50    }
51    if process_name.rfind('/').is_some() {
52        (_, process_name) = process_name.split_at(process_name.rfind('/').unwrap() + 1);
53    }
54    process_name.to_string()
55}
56
57fn read_thread_name(pid: u32) -> String {
58    let path = format!("/proc/{}/comm", pid);
59    fs::read_to_string(path).unwrap()
60}
61
62#[allow(unused_variables)]
63fn report_info_handler(info: &PanicInfo) {
64    let (file, line) = info.location().map(|loc| (loc.file(), loc.line())).unwrap_or(("<unknown>", 0));
65    let errmsg = match info.payload().downcast_ref::<&'static str>() {
66        Some(s) => *s,
67        None => match info.payload().downcast_ref::<String>() {
68            Some(s) => &**s,
69            None => "Box<Any>",
70        },
71    };
72
73    let pid = process::id();
74    let process_name = read_process_name(pid);
75    let thread_name = read_thread_name(pid);
76    let panic_reason = format!("file:{} line:{} message:{}", file, line, errmsg);
77    let thread_label = format!("Thread name:{}{}", thread_name, stacktrace_rust::get_trace(true).as_str());
78    let happen_time = SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_millis();
79    let ret = hisysevent::write(
80        "RELIABILITY",
81        "RUST_PANIC",
82        EventType::Fault,
83        &[hisysevent::build_str_param!("MODULE", process_name.as_str()),
84            hisysevent::build_str_param!("REASON", panic_reason.as_str()),
85            hisysevent::build_number_param!("PID", pid),
86            hisysevent::build_number_param!("TID", unsafe { libc::gettid() }),
87            hisysevent::build_number_param!("UID", unsafe { libc::getuid() }),
88            hisysevent::build_str_param!("SUMMARY", thread_label.as_str()),
89            hisysevent::build_number_param!("HAPPEN_TIME", happen_time)
90        ]
91    );
92    if ret != 0 {
93        error!(LOG_LABEL, "RUST_PANIC hisysevent write failed");
94    }
95}
96
97/// Initializes the panic hook
98pub fn init() {
99    panic_handler();
100}