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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
extern crate minidump_writer;
use libc::pid_t;
use minidump_writer::crash_context::CrashContext;
use minidump_writer::minidump_writer::MinidumpWriter;
use std::ffi::{CStr, CString};
use std::mem::{self, MaybeUninit};
use std::os::raw::c_char;
use std::ptr::null_mut;
// This function will be exposed to C++
#[no_mangle]
pub unsafe extern "C" fn write_minidump_linux(
dump_path: *const c_char,
child: pid_t,
child_blamed_thread: pid_t,
error_msg: *mut *mut c_char,
) -> bool {
assert!(!dump_path.is_null());
let c_path = CStr::from_ptr(dump_path);
let path = match c_path.to_str() {
Ok(s) => s,
Err(x) => {
error_message_to_c(
error_msg,
format!(
"Wrapper error. Path not convertable: {:#}",
anyhow::Error::new(x)
),
);
return false;
}
};
let mut dump_file = match std::fs::OpenOptions::new()
.create(true) // Create file if it doesn't exist
.write(true) // Truncate file
.open(path)
{
Ok(f) => f,
Err(x) => {
error_message_to_c(
error_msg,
format!(
"Wrapper error when opening minidump destination at {:?}: {:#}",
path,
anyhow::Error::new(x)
),
);
return false;
}
};
match MinidumpWriter::new(child, child_blamed_thread).dump(&mut dump_file) {
Ok(_) => {
return true;
}
Err(x) => {
error_message_to_c(error_msg, format!("{:#}", anyhow::Error::new(x)));
return false;
}
}
}
#[allow(non_camel_case_types)]
#[cfg(not(target_arch = "arm"))]
type fpregset_t = crash_context::fpregset_t;
#[allow(non_camel_case_types)]
#[cfg(target_arch = "arm")]
pub struct fpregset_t {}
// This function will be exposed to C++
#[no_mangle]
pub unsafe extern "C" fn write_minidump_linux_with_context(
dump_path: *const c_char,
child: pid_t,
ucontext: *const crash_context::ucontext_t,
#[allow(unused)] float_state: *const fpregset_t,
siginfo: *const libc::signalfd_siginfo,
child_thread: libc::pid_t,
error_msg: *mut *mut c_char,
) -> bool {
let c_path = CStr::from_ptr(dump_path);
let mut crash_context: MaybeUninit<crash_context::CrashContext> = mem::MaybeUninit::zeroed();
let cc = &mut *crash_context.as_mut_ptr();
core::ptr::copy_nonoverlapping(siginfo, &mut cc.siginfo, 1);
core::ptr::copy_nonoverlapping(ucontext, &mut cc.context, 1);
#[cfg(not(target_arch = "arm"))]
core::ptr::copy_nonoverlapping(float_state, &mut cc.float_state, 1);
cc.pid = child;
cc.tid = child_thread;
let crash_context = crash_context.assume_init();
let crash_context = CrashContext {
inner: crash_context,
};
let path = match c_path.to_str() {
Ok(s) => s,
Err(x) => {
error_message_to_c(
error_msg,
format!(
"Wrapper error. Path not convertable: {:#}",
anyhow::Error::new(x)
),
);
return false;
}
};
let mut dump_file = match std::fs::OpenOptions::new()
.create(true) // Create file if it doesn't exist
.write(true) // Truncate file
.open(path)
{
Ok(f) => f,
Err(x) => {
error_message_to_c(
error_msg,
format!(
"Wrapper error when opening minidump destination at {:?}: {:#}",
path,
anyhow::Error::new(x)
),
);
return false;
}
};
match MinidumpWriter::new(child, child_thread)
.set_crash_context(crash_context)
.dump(&mut dump_file)
{
Ok(_) => {
return true;
}
Err(x) => {
error_message_to_c(error_msg, format!("{:#}", anyhow::Error::new(x)));
return false;
}
}
}
fn error_message_to_c(c_string_pointer: *mut *mut c_char, error_message: String) {
if c_string_pointer != null_mut() {
let c_error_message = CString::new(error_message).unwrap_or_default();
unsafe { *c_string_pointer = c_error_message.into_raw() };
}
}
// This function will be exposed to C++
#[no_mangle]
pub unsafe extern "C" fn free_minidump_error_msg(c_string: *mut c_char) {
// Unused because we just need to drop it
let _c_string = unsafe { CString::from_raw(c_string) };
}
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