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use nix::Error;
use nix::errno::Errno;
use nix::unistd::getpid;
use nix::sys::ptrace::{self, Options};
use std::mem;
#[test]
fn test_ptrace() {
// Just make sure ptrace can be called at all, for now.
// FIXME: qemu-user doesn't implement ptrace on all arches, so permit ENOSYS
let err = ptrace::attach(getpid()).unwrap_err();
assert!(err == Error::Sys(Errno::EPERM) || err == Error::Sys(Errno::ENOSYS));
}
// Just make sure ptrace_setoptions can be called at all, for now.
#[test]
fn test_ptrace_setoptions() {
let err = ptrace::setoptions(getpid(), Options::PTRACE_O_TRACESYSGOOD).unwrap_err();
assert!(err != Error::UnsupportedOperation);
}
// Just make sure ptrace_getevent can be called at all, for now.
#[test]
fn test_ptrace_getevent() {
let err = ptrace::getevent(getpid()).unwrap_err();
assert!(err != Error::UnsupportedOperation);
}
// Just make sure ptrace_getsiginfo can be called at all, for now.
#[test]
fn test_ptrace_getsiginfo() {
match ptrace::getsiginfo(getpid()) {
Err(Error::UnsupportedOperation) => panic!("ptrace_getsiginfo returns Error::UnsupportedOperation!"),
_ => (),
}
}
// Just make sure ptrace_setsiginfo can be called at all, for now.
#[test]
fn test_ptrace_setsiginfo() {
let siginfo = unsafe { mem::uninitialized() };
match ptrace::setsiginfo(getpid(), &siginfo) {
Err(Error::UnsupportedOperation) => panic!("ptrace_setsiginfo returns Error::UnsupportedOperation!"),
_ => (),
}
}
#[test]
fn test_ptrace_cont() {
use nix::sys::ptrace;
use nix::sys::signal::{raise, Signal};
use nix::sys::wait::{waitpid, WaitStatus};
use nix::unistd::fork;
use nix::unistd::ForkResult::*;
// FIXME: qemu-user doesn't implement ptrace on all architectures
// and retunrs ENOSYS in this case.
// We (ab)use this behavior to detect the affected platforms
// and skip the test then.
// On valid platforms the ptrace call should return Errno::EPERM, this
// is already tested by `test_ptrace`.
let err = ptrace::attach(getpid()).unwrap_err();
if err == Error::Sys(Errno::ENOSYS) {
return;
}
match fork().expect("Error: Fork Failed") {
Child => {
ptrace::traceme().unwrap();
// As recommended by ptrace(2), raise SIGTRAP to pause the child
// until the parent is ready to continue
loop {
raise(Signal::SIGTRAP).unwrap();
}
},
Parent { child } => {
assert_eq!(waitpid(child, None), Ok(WaitStatus::Stopped(child, Signal::SIGTRAP)));
ptrace::cont(child, None).unwrap();
assert_eq!(waitpid(child, None), Ok(WaitStatus::Stopped(child, Signal::SIGTRAP)));
ptrace::cont(child, Signal::SIGKILL).unwrap();
match waitpid(child, None) {
Ok(WaitStatus::Signaled(pid, Signal::SIGKILL, _)) if pid == child => {}
_ => panic!("The process should have been killed"),
}
},
}
}
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