diff options
Diffstat (limited to 'toolkit/components/processtools/src/lib.rs')
| -rw-r--r-- | toolkit/components/processtools/src/lib.rs | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/toolkit/components/processtools/src/lib.rs b/toolkit/components/processtools/src/lib.rs new file mode 100644 index 0000000000..16bf2f8f47 --- /dev/null +++ b/toolkit/components/processtools/src/lib.rs @@ -0,0 +1,197 @@ +/* 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/. */ + +#[cfg(not(target_os = "windows"))] +extern crate libc; +#[cfg(target_os = "windows")] +extern crate winapi; + +extern crate nserror; +extern crate xpcom; + +use std::convert::TryInto; + +use nserror::{nsresult, NS_ERROR_FAILURE, NS_OK}; +use xpcom::{interfaces::nsIProcessToolsService, xpcom, xpcom_method, RefPtr}; + +// Separate this `use` to avoid build-breaking warnings. +#[cfg(target_os = "windows")] +use nserror::NS_ERROR_NOT_AVAILABLE; + +#[cfg(target_os = "windows")] +struct Handle(winapi::um::winnt::HANDLE); + +#[cfg(target_os = "windows")] +impl Handle { + fn from_raw(raw: winapi::um::winnt::HANDLE) -> Option<Self> { + (raw != std::ptr::null_mut() && raw != winapi::um::handleapi::INVALID_HANDLE_VALUE) + .then_some(Handle(raw)) + } + + fn raw(self: &Self) -> winapi::um::winnt::HANDLE { + self.0 + } +} + +#[cfg(target_os = "windows")] +impl Drop for Handle { + fn drop(&mut self) { + unsafe { + winapi::um::handleapi::CloseHandle(self.raw()); + } + } +} + +#[no_mangle] +pub unsafe extern "C" fn new_process_tools_service(result: *mut *const nsIProcessToolsService) { + let service: RefPtr<ProcessToolsService> = ProcessToolsService::new(); + RefPtr::new(service.coerce::<nsIProcessToolsService>()).forget(&mut *result); +} + +// Implementation note: +// +// We're following the strategy employed by the `kvstore`. +// See https://searchfox.org/mozilla-central/rev/a87a1c3b543475276e6d57a7a80cb02f3e42b6ed/toolkit/components/kvstore/src/lib.rs#78 + +#[xpcom(implement(nsIProcessToolsService), atomic)] +pub struct ProcessToolsService {} + +impl ProcessToolsService { + pub fn new() -> RefPtr<ProcessToolsService> { + ProcessToolsService::allocate(InitProcessToolsService {}) + } + + // Method `kill`. + + xpcom_method!( + kill => Kill(id: u64) + ); + + #[cfg(target_os = "windows")] + pub fn kill(&self, pid: u64) -> Result<(), nsresult> { + let handle = unsafe { + winapi::um::processthreadsapi::OpenProcess( + /* dwDesiredAccess */ + winapi::um::winnt::PROCESS_TERMINATE | winapi::um::winnt::SYNCHRONIZE, + /* bInheritHandle */ 0, + /* dwProcessId */ pid.try_into().unwrap(), + ) + }; + let handle = Handle::from_raw(handle).ok_or(NS_ERROR_NOT_AVAILABLE)?; + + let result = unsafe { + winapi::um::processthreadsapi::TerminateProcess( + /* hProcess */ handle.raw(), + /* uExitCode */ 0, + ) + }; + + if result == 0 { + return Err(NS_ERROR_FAILURE); + } + Ok(()) + } + + #[cfg(not(target_os = "windows"))] + pub fn kill(&self, pid: u64) -> Result<(), nsresult> { + let pid = pid.try_into().or(Err(NS_ERROR_FAILURE))?; + let result = unsafe { libc::kill(pid, libc::SIGKILL) }; + if result == 0 { + Ok(()) + } else { + Err(NS_ERROR_FAILURE) + } + } + + // Method `crash` + + xpcom_method!( + crash => Crash(id: u64) + ); + + #[cfg(target_os = "windows")] + pub fn crash(&self, pid: u64) -> Result<(), nsresult> { + let ntdll = unsafe { + winapi::um::libloaderapi::GetModuleHandleA( + /* lpModuleName */ std::mem::transmute(b"ntdll.dll\0".as_ptr()), + ) + }; + if ntdll.is_null() { + return Err(NS_ERROR_NOT_AVAILABLE); + } + + let dbg_break_point = unsafe { + winapi::um::libloaderapi::GetProcAddress( + /* hModule */ ntdll, + /* lpProcName */ std::mem::transmute(b"DbgBreakPoint\0".as_ptr()), + ) + }; + if dbg_break_point.is_null() { + return Err(NS_ERROR_NOT_AVAILABLE); + } + + let target_proc = unsafe { + winapi::um::processthreadsapi::OpenProcess( + /* dwDesiredAccess */ + winapi::um::winnt::PROCESS_VM_OPERATION + | winapi::um::winnt::PROCESS_CREATE_THREAD + | winapi::um::winnt::PROCESS_QUERY_INFORMATION, + /* bInheritHandle */ 0, + /* dwProcessId */ pid.try_into().unwrap(), + ) + }; + let target_proc = Handle::from_raw(target_proc).ok_or(NS_ERROR_NOT_AVAILABLE)?; + + let new_thread = unsafe { + winapi::um::processthreadsapi::CreateRemoteThread( + /* hProcess */ target_proc.raw(), + /* lpThreadAttributes */ std::ptr::null_mut(), + /* dwStackSize */ 0, + /* lpStartAddress */ Some(std::mem::transmute(dbg_break_point)), + /* lpParameter */ std::ptr::null_mut(), + /* dwCreationFlags */ 0, + /* lpThreadId */ std::ptr::null_mut(), + ) + }; + let new_thread = Handle::from_raw(new_thread).ok_or(NS_ERROR_FAILURE)?; + + unsafe { + winapi::um::synchapi::WaitForSingleObject( + new_thread.raw(), + winapi::um::winbase::INFINITE, + ); + } + + Ok(()) + } + + #[cfg(not(target_os = "windows"))] + pub fn crash(&self, pid: u64) -> Result<(), nsresult> { + let pid = pid.try_into().or(Err(NS_ERROR_FAILURE))?; + let result = unsafe { libc::kill(pid, libc::SIGABRT) }; + if result == 0 { + Ok(()) + } else { + Err(NS_ERROR_FAILURE) + } + } + + // Attribute `pid` + + xpcom_method!( + get_pid => GetPid() -> u64 + ); + + #[cfg(not(target_os = "windows"))] + pub fn get_pid(&self) -> Result<u64, nsresult> { + let pid = unsafe { libc::getpid() } as u64; + Ok(pid) + } + + #[cfg(target_os = "windows")] + pub fn get_pid(&self) -> Result<u64, nsresult> { + let pid = unsafe { winapi::um::processthreadsapi::GetCurrentProcessId() } as u64; + Ok(pid) + } +} |