1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
use nix::unistd::*;
use nix::unistd::ForkResult::*;
use nix::sys::signal::*;
use nix::sys::wait::*;
use libc::_exit;
#[test]
fn test_wait_signal() {
#[allow(unused_variables)]
let m = ::FORK_MTX.lock().expect("Mutex got poisoned by another test");
// Safe: The child only calls `pause` and/or `_exit`, which are async-signal-safe.
match fork() {
Ok(Child) => pause().unwrap_or_else(|_| unsafe { _exit(123) }),
Ok(Parent { child }) => {
kill(child, Some(SIGKILL)).ok().expect("Error: Kill Failed");
assert_eq!(waitpid(child, None), Ok(WaitStatus::Signaled(child, SIGKILL, false)));
},
// panic, fork should never fail unless there is a serious problem with the OS
Err(_) => panic!("Error: Fork Failed")
}
}
#[test]
fn test_wait_exit() {
#[allow(unused_variables)]
let m = ::FORK_MTX.lock().expect("Mutex got poisoned by another test");
// Safe: Child only calls `_exit`, which is async-signal-safe.
match fork() {
Ok(Child) => unsafe { _exit(12); },
Ok(Parent { child }) => {
assert_eq!(waitpid(child, None), Ok(WaitStatus::Exited(child, 12)));
},
// panic, fork should never fail unless there is a serious problem with the OS
Err(_) => panic!("Error: Fork Failed")
}
}
#[test]
fn test_waitstatus_pid() {
let _m = ::FORK_MTX.lock().expect("Mutex got poisoned by another test");
match fork().unwrap() {
Child => unsafe { _exit(0) },
Parent { child } => {
let status = waitpid(child, None).unwrap();
assert_eq!(status.pid(), Some(child));
}
}
}
#[cfg(any(target_os = "linux", target_os = "android"))]
// FIXME: qemu-user doesn't implement ptrace on most arches
#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
mod ptrace {
use nix::sys::ptrace::{self, Options, Event};
use nix::sys::signal::*;
use nix::sys::wait::*;
use nix::unistd::*;
use nix::unistd::ForkResult::*;
use libc::_exit;
fn ptrace_child() -> ! {
ptrace::traceme().unwrap();
// As recommended by ptrace(2), raise SIGTRAP to pause the child
// until the parent is ready to continue
raise(SIGTRAP).unwrap();
unsafe { _exit(0) }
}
fn ptrace_parent(child: Pid) {
// Wait for the raised SIGTRAP
assert_eq!(waitpid(child, None), Ok(WaitStatus::Stopped(child, SIGTRAP)));
// We want to test a syscall stop and a PTRACE_EVENT stop
assert!(ptrace::setoptions(child, Options::PTRACE_O_TRACESYSGOOD | Options::PTRACE_O_TRACEEXIT).is_ok());
// First, stop on the next system call, which will be exit()
assert!(ptrace::syscall(child).is_ok());
assert_eq!(waitpid(child, None), Ok(WaitStatus::PtraceSyscall(child)));
// Then get the ptrace event for the process exiting
assert!(ptrace::cont(child, None).is_ok());
assert_eq!(waitpid(child, None), Ok(WaitStatus::PtraceEvent(child, SIGTRAP, Event::PTRACE_EVENT_EXIT as i32)));
// Finally get the normal wait() result, now that the process has exited
assert!(ptrace::cont(child, None).is_ok());
assert_eq!(waitpid(child, None), Ok(WaitStatus::Exited(child, 0)));
}
#[test]
fn test_wait_ptrace() {
#[allow(unused_variables)]
let m = ::FORK_MTX.lock().expect("Mutex got poisoned by another test");
match fork() {
Ok(Child) => ptrace_child(),
Ok(Parent { child }) => ptrace_parent(child),
Err(_) => panic!("Error: Fork Failed")
}
}
}
|
