2019-09-24 17:28:00 -05:00
|
|
|
use std::collections::HashMap;
|
2019-12-23 05:56:23 -06:00
|
|
|
use std::convert::{TryFrom, TryInto};
|
2019-10-24 08:44:13 -05:00
|
|
|
use std::fs::{remove_file, File, OpenOptions};
|
2019-10-01 13:48:59 -05:00
|
|
|
use std::io::{Read, Write};
|
2019-11-30 14:09:52 -06:00
|
|
|
use std::path::PathBuf;
|
|
|
|
use std::time::SystemTime;
|
2019-09-24 17:28:00 -05:00
|
|
|
|
2019-12-23 05:56:23 -06:00
|
|
|
use rustc::ty::layout::{Align, LayoutOf, Size};
|
2019-09-30 14:21:45 -05:00
|
|
|
|
2019-09-24 17:28:00 -05:00
|
|
|
use crate::stacked_borrows::Tag;
|
|
|
|
use crate::*;
|
2019-11-30 14:09:52 -06:00
|
|
|
use helpers::immty_from_uint_checked;
|
|
|
|
use shims::time::system_time_to_duration;
|
2019-09-24 17:28:00 -05:00
|
|
|
|
2019-10-20 05:20:48 -05:00
|
|
|
#[derive(Debug)]
|
2019-09-30 15:18:23 -05:00
|
|
|
pub struct FileHandle {
|
2019-09-30 11:51:09 -05:00
|
|
|
file: File,
|
|
|
|
}
|
|
|
|
|
2019-09-24 17:28:00 -05:00
|
|
|
pub struct FileHandler {
|
2019-09-30 11:51:09 -05:00
|
|
|
handles: HashMap<i32, FileHandle>,
|
2019-09-24 17:28:00 -05:00
|
|
|
low: i32,
|
|
|
|
}
|
|
|
|
|
2019-09-28 14:22:57 -05:00
|
|
|
impl Default for FileHandler {
|
|
|
|
fn default() -> Self {
|
|
|
|
FileHandler {
|
2019-09-30 11:51:09 -05:00
|
|
|
handles: Default::default(),
|
2019-10-21 06:24:56 -05:00
|
|
|
// 0, 1 and 2 are reserved for stdin, stdout and stderr.
|
2019-09-28 14:22:57 -05:00
|
|
|
low: 3,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-09-24 17:28:00 -05:00
|
|
|
impl<'mir, 'tcx> EvalContextExt<'mir, 'tcx> for crate::MiriEvalContext<'mir, 'tcx> {}
|
|
|
|
pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx> {
|
|
|
|
fn open(
|
|
|
|
&mut self,
|
|
|
|
path_op: OpTy<'tcx, Tag>,
|
|
|
|
flag_op: OpTy<'tcx, Tag>,
|
|
|
|
) -> InterpResult<'tcx, i32> {
|
|
|
|
let this = self.eval_context_mut();
|
|
|
|
|
2019-10-14 15:36:15 -05:00
|
|
|
this.check_no_isolation("open")?;
|
2019-09-24 17:28:00 -05:00
|
|
|
|
|
|
|
let flag = this.read_scalar(flag_op)?.to_i32()?;
|
|
|
|
|
2019-09-30 11:46:07 -05:00
|
|
|
let mut options = OpenOptions::new();
|
|
|
|
|
2019-10-14 16:42:29 -05:00
|
|
|
let o_rdonly = this.eval_libc_i32("O_RDONLY")?;
|
|
|
|
let o_wronly = this.eval_libc_i32("O_WRONLY")?;
|
|
|
|
let o_rdwr = this.eval_libc_i32("O_RDWR")?;
|
|
|
|
// The first two bits of the flag correspond to the access mode in linux, macOS and
|
|
|
|
// windows. We need to check that in fact the access mode flags for the current platform
|
|
|
|
// only use these two bits, otherwise we are in an unsupported platform and should error.
|
|
|
|
if (o_rdonly | o_wronly | o_rdwr) & !0b11 != 0 {
|
|
|
|
throw_unsup_format!("Access mode flags on this platform are unsupported");
|
|
|
|
}
|
|
|
|
// Now we check the access mode
|
2019-09-30 11:46:07 -05:00
|
|
|
let access_mode = flag & 0b11;
|
|
|
|
|
2019-10-14 16:42:29 -05:00
|
|
|
if access_mode == o_rdonly {
|
2019-09-30 11:46:07 -05:00
|
|
|
options.read(true);
|
2019-10-14 16:42:29 -05:00
|
|
|
} else if access_mode == o_wronly {
|
2019-09-30 11:46:07 -05:00
|
|
|
options.write(true);
|
2019-10-14 16:42:29 -05:00
|
|
|
} else if access_mode == o_rdwr {
|
2019-09-30 11:46:07 -05:00
|
|
|
options.read(true).write(true);
|
|
|
|
} else {
|
|
|
|
throw_unsup_format!("Unsupported access mode {:#x}", access_mode);
|
|
|
|
}
|
2019-10-11 05:30:50 -05:00
|
|
|
// We need to check that there aren't unsupported options in `flag`. For this we try to
|
|
|
|
// reproduce the content of `flag` in the `mirror` variable using only the supported
|
|
|
|
// options.
|
|
|
|
let mut mirror = access_mode;
|
2019-09-30 11:46:07 -05:00
|
|
|
|
2019-10-11 05:30:50 -05:00
|
|
|
let o_append = this.eval_libc_i32("O_APPEND")?;
|
|
|
|
if flag & o_append != 0 {
|
2019-09-30 11:46:07 -05:00
|
|
|
options.append(true);
|
2019-10-11 05:30:50 -05:00
|
|
|
mirror |= o_append;
|
2019-09-30 11:46:07 -05:00
|
|
|
}
|
2019-10-11 05:30:50 -05:00
|
|
|
let o_trunc = this.eval_libc_i32("O_TRUNC")?;
|
|
|
|
if flag & o_trunc != 0 {
|
2019-09-30 11:46:07 -05:00
|
|
|
options.truncate(true);
|
2019-10-11 05:30:50 -05:00
|
|
|
mirror |= o_trunc;
|
2019-09-30 11:46:07 -05:00
|
|
|
}
|
2019-10-11 05:30:50 -05:00
|
|
|
let o_creat = this.eval_libc_i32("O_CREAT")?;
|
|
|
|
if flag & o_creat != 0 {
|
2019-09-30 11:46:07 -05:00
|
|
|
options.create(true);
|
2019-10-11 05:30:50 -05:00
|
|
|
mirror |= o_creat;
|
|
|
|
}
|
|
|
|
let o_cloexec = this.eval_libc_i32("O_CLOEXEC")?;
|
|
|
|
if flag & o_cloexec != 0 {
|
2019-10-12 20:12:26 -05:00
|
|
|
// We do not need to do anything for this flag because `std` already sets it.
|
|
|
|
// (Technically we do not support *not* setting this flag, but we ignore that.)
|
2019-10-11 05:30:50 -05:00
|
|
|
mirror |= o_cloexec;
|
|
|
|
}
|
|
|
|
// If `flag` is not equal to `mirror`, there is an unsupported option enabled in `flag`,
|
|
|
|
// then we throw an error.
|
|
|
|
if flag != mirror {
|
2019-10-12 20:12:26 -05:00
|
|
|
throw_unsup_format!("unsupported flags {:#x}", flag & !mirror);
|
2019-09-24 17:28:00 -05:00
|
|
|
}
|
|
|
|
|
2019-12-04 03:43:36 -06:00
|
|
|
let path = this.read_os_str_from_c_str(this.read_scalar(path_op)?.not_undef()?)?;
|
2019-09-30 11:46:07 -05:00
|
|
|
|
2019-11-30 14:09:52 -06:00
|
|
|
let fd = options.open(&path).map(|file| {
|
2019-09-30 14:07:08 -05:00
|
|
|
let mut fh = &mut this.machine.file_handler;
|
|
|
|
fh.low += 1;
|
2019-10-20 05:20:48 -05:00
|
|
|
fh.handles.insert(fh.low, FileHandle { file }).unwrap_none();
|
2019-09-30 14:07:08 -05:00
|
|
|
fh.low
|
|
|
|
});
|
|
|
|
|
2019-10-18 14:33:25 -05:00
|
|
|
this.try_unwrap_io_result(fd)
|
2019-09-24 17:28:00 -05:00
|
|
|
}
|
|
|
|
|
|
|
|
fn fcntl(
|
|
|
|
&mut self,
|
|
|
|
fd_op: OpTy<'tcx, Tag>,
|
|
|
|
cmd_op: OpTy<'tcx, Tag>,
|
2019-10-12 20:12:26 -05:00
|
|
|
_arg1_op: Option<OpTy<'tcx, Tag>>,
|
2019-09-24 17:28:00 -05:00
|
|
|
) -> InterpResult<'tcx, i32> {
|
|
|
|
let this = self.eval_context_mut();
|
|
|
|
|
2019-10-14 15:36:15 -05:00
|
|
|
this.check_no_isolation("fcntl")?;
|
2019-09-24 17:28:00 -05:00
|
|
|
|
|
|
|
let fd = this.read_scalar(fd_op)?.to_i32()?;
|
|
|
|
let cmd = this.read_scalar(cmd_op)?.to_i32()?;
|
2019-10-21 06:24:56 -05:00
|
|
|
// We only support getting the flags for a descriptor.
|
2019-10-11 12:17:54 -05:00
|
|
|
if cmd == this.eval_libc_i32("F_GETFD")? {
|
2019-10-12 20:12:26 -05:00
|
|
|
// Currently this is the only flag that `F_GETFD` returns. It is OK to just return the
|
|
|
|
// `FD_CLOEXEC` value without checking if the flag is set for the file because `std`
|
|
|
|
// always sets this flag when opening a file. However we still need to check that the
|
|
|
|
// file itself is open.
|
2019-10-24 08:44:13 -05:00
|
|
|
if this.machine.file_handler.handles.contains_key(&fd) {
|
|
|
|
Ok(this.eval_libc_i32("FD_CLOEXEC")?)
|
|
|
|
} else {
|
|
|
|
this.handle_not_found()
|
|
|
|
}
|
2019-09-24 17:28:00 -05:00
|
|
|
} else {
|
2019-10-11 12:17:54 -05:00
|
|
|
throw_unsup_format!("The {:#x} command is not supported for `fcntl`)", cmd);
|
2019-09-24 17:28:00 -05:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
fn close(&mut self, fd_op: OpTy<'tcx, Tag>) -> InterpResult<'tcx, i32> {
|
|
|
|
let this = self.eval_context_mut();
|
|
|
|
|
2019-10-14 15:36:15 -05:00
|
|
|
this.check_no_isolation("close")?;
|
2019-09-24 17:28:00 -05:00
|
|
|
|
|
|
|
let fd = this.read_scalar(fd_op)?.to_i32()?;
|
|
|
|
|
2019-10-24 08:44:13 -05:00
|
|
|
if let Some(handle) = this.machine.file_handler.handles.remove(&fd) {
|
2019-10-26 08:54:02 -05:00
|
|
|
// `File::sync_all` does the checks that are done when closing a file. We do this to
|
|
|
|
// to handle possible errors correctly.
|
|
|
|
let result = this.try_unwrap_io_result(handle.file.sync_all().map(|_| 0i32));
|
2019-11-03 10:04:00 -06:00
|
|
|
// Now we actually close the file.
|
2019-10-26 08:54:02 -05:00
|
|
|
drop(handle);
|
|
|
|
// And return the result.
|
|
|
|
result
|
2019-10-24 08:44:13 -05:00
|
|
|
} else {
|
|
|
|
this.handle_not_found()
|
|
|
|
}
|
2019-09-24 17:28:00 -05:00
|
|
|
}
|
|
|
|
|
|
|
|
fn read(
|
|
|
|
&mut self,
|
|
|
|
fd_op: OpTy<'tcx, Tag>,
|
|
|
|
buf_op: OpTy<'tcx, Tag>,
|
|
|
|
count_op: OpTy<'tcx, Tag>,
|
|
|
|
) -> InterpResult<'tcx, i64> {
|
|
|
|
let this = self.eval_context_mut();
|
|
|
|
|
2019-10-14 15:36:15 -05:00
|
|
|
this.check_no_isolation("read")?;
|
2019-09-24 17:28:00 -05:00
|
|
|
|
2019-11-17 02:30:32 -06:00
|
|
|
let fd = this.read_scalar(fd_op)?.to_i32()?;
|
|
|
|
let buf = this.read_scalar(buf_op)?.not_undef()?;
|
2019-12-23 05:56:23 -06:00
|
|
|
let count = this.read_scalar(count_op)?.to_machine_usize(&*this.tcx)?;
|
2019-11-14 03:29:43 -06:00
|
|
|
|
2019-11-17 02:30:32 -06:00
|
|
|
// Check that the *entire* buffer is actually valid memory.
|
2019-12-23 05:56:23 -06:00
|
|
|
this.memory.check_ptr_access(
|
|
|
|
buf,
|
|
|
|
Size::from_bytes(count),
|
|
|
|
Align::from_bytes(1).unwrap(),
|
|
|
|
)?;
|
2019-11-17 02:30:32 -06:00
|
|
|
|
|
|
|
// We cap the number of read bytes to the largest value that we are able to fit in both the
|
|
|
|
// host's and target's `isize`. This saves us from having to handle overflows later.
|
2019-12-23 05:56:23 -06:00
|
|
|
let count = count.min(this.isize_max() as u64).min(isize::max_value() as u64);
|
2019-10-24 08:44:13 -05:00
|
|
|
|
|
|
|
if let Some(handle) = this.machine.file_handler.handles.get_mut(&fd) {
|
2019-11-13 10:57:20 -06:00
|
|
|
// This can never fail because `count` was capped to be smaller than
|
|
|
|
// `isize::max_value()`.
|
2019-11-09 08:15:52 -06:00
|
|
|
let count = isize::try_from(count).unwrap();
|
2019-11-07 13:50:16 -06:00
|
|
|
// We want to read at most `count` bytes. We are sure that `count` is not negative
|
|
|
|
// because it was a target's `usize`. Also we are sure that its smaller than
|
|
|
|
// `usize::max_value()` because it is a host's `isize`.
|
|
|
|
let mut bytes = vec![0; count as usize];
|
2019-11-09 08:15:52 -06:00
|
|
|
let result = handle
|
|
|
|
.file
|
|
|
|
.read(&mut bytes)
|
2019-11-13 13:45:00 -06:00
|
|
|
// `File::read` never returns a value larger than `count`, so this cannot fail.
|
2019-11-09 08:15:52 -06:00
|
|
|
.map(|c| i64::try_from(c).unwrap());
|
2019-10-28 16:44:18 -05:00
|
|
|
|
2019-11-04 08:38:21 -06:00
|
|
|
match result {
|
2019-11-09 08:15:52 -06:00
|
|
|
Ok(read_bytes) => {
|
2019-11-05 15:47:24 -06:00
|
|
|
// If reading to `bytes` did not fail, we write those bytes to the buffer.
|
|
|
|
this.memory.write_bytes(buf, bytes)?;
|
|
|
|
Ok(read_bytes)
|
2019-11-09 08:15:52 -06:00
|
|
|
}
|
2019-11-04 08:38:21 -06:00
|
|
|
Err(e) => {
|
|
|
|
this.set_last_error_from_io_error(e)?;
|
|
|
|
Ok(-1)
|
2019-10-28 16:44:18 -05:00
|
|
|
}
|
2019-10-24 08:44:13 -05:00
|
|
|
}
|
|
|
|
} else {
|
|
|
|
this.handle_not_found()
|
|
|
|
}
|
2019-09-30 15:18:23 -05:00
|
|
|
}
|
|
|
|
|
2019-09-30 11:46:07 -05:00
|
|
|
fn write(
|
|
|
|
&mut self,
|
|
|
|
fd_op: OpTy<'tcx, Tag>,
|
|
|
|
buf_op: OpTy<'tcx, Tag>,
|
|
|
|
count_op: OpTy<'tcx, Tag>,
|
|
|
|
) -> InterpResult<'tcx, i64> {
|
|
|
|
let this = self.eval_context_mut();
|
|
|
|
|
2019-10-14 15:36:15 -05:00
|
|
|
this.check_no_isolation("write")?;
|
2019-09-30 11:46:07 -05:00
|
|
|
|
2019-11-17 02:30:32 -06:00
|
|
|
let fd = this.read_scalar(fd_op)?.to_i32()?;
|
|
|
|
let buf = this.read_scalar(buf_op)?.not_undef()?;
|
2019-12-23 05:56:23 -06:00
|
|
|
let count = this.read_scalar(count_op)?.to_machine_usize(&*this.tcx)?;
|
2019-11-14 03:29:43 -06:00
|
|
|
|
2019-11-17 02:30:32 -06:00
|
|
|
// Check that the *entire* buffer is actually valid memory.
|
2019-12-23 05:56:23 -06:00
|
|
|
this.memory.check_ptr_access(
|
|
|
|
buf,
|
|
|
|
Size::from_bytes(count),
|
|
|
|
Align::from_bytes(1).unwrap(),
|
|
|
|
)?;
|
2019-11-17 02:30:32 -06:00
|
|
|
|
|
|
|
// We cap the number of written bytes to the largest value that we are able to fit in both the
|
|
|
|
// host's and target's `isize`. This saves us from having to handle overflows later.
|
2019-12-23 05:56:23 -06:00
|
|
|
let count = count.min(this.isize_max() as u64).min(isize::max_value() as u64);
|
2019-10-24 08:44:13 -05:00
|
|
|
|
|
|
|
if let Some(handle) = this.machine.file_handler.handles.get_mut(&fd) {
|
|
|
|
let bytes = this.memory.read_bytes(buf, Size::from_bytes(count))?;
|
2019-11-09 08:15:52 -06:00
|
|
|
let result = handle.file.write(&bytes).map(|c| i64::try_from(c).unwrap());
|
|
|
|
this.try_unwrap_io_result(result)
|
2019-10-24 08:44:13 -05:00
|
|
|
} else {
|
|
|
|
this.handle_not_found()
|
|
|
|
}
|
2019-09-30 11:46:07 -05:00
|
|
|
}
|
|
|
|
|
2019-10-24 08:44:13 -05:00
|
|
|
fn unlink(&mut self, path_op: OpTy<'tcx, Tag>) -> InterpResult<'tcx, i32> {
|
2019-10-03 09:33:36 -05:00
|
|
|
let this = self.eval_context_mut();
|
|
|
|
|
2019-10-14 15:36:15 -05:00
|
|
|
this.check_no_isolation("unlink")?;
|
2019-10-03 09:33:36 -05:00
|
|
|
|
2019-12-04 03:43:36 -06:00
|
|
|
let path = this.read_os_str_from_c_str(this.read_scalar(path_op)?.not_undef()?)?;
|
2019-10-03 09:33:36 -05:00
|
|
|
|
|
|
|
let result = remove_file(path).map(|_| 0);
|
|
|
|
|
2019-10-18 14:33:25 -05:00
|
|
|
this.try_unwrap_io_result(result)
|
2019-10-03 09:33:36 -05:00
|
|
|
}
|
|
|
|
|
2019-12-24 10:53:03 -06:00
|
|
|
fn stat(
|
|
|
|
&mut self,
|
|
|
|
path_op: OpTy<'tcx, Tag>,
|
2019-12-24 10:01:01 -06:00
|
|
|
buf_op: OpTy<'tcx, Tag>,
|
|
|
|
) -> InterpResult<'tcx, i32> {
|
|
|
|
let this = self.eval_context_mut();
|
|
|
|
|
2019-12-25 10:30:01 -06:00
|
|
|
if this.tcx.sess.target.target.target_os.to_lowercase() != "macos" {
|
2019-12-25 15:09:54 -06:00
|
|
|
throw_unsup_format!("The `stat` shim is only only available for `macos` targets.")
|
2019-12-25 10:30:01 -06:00
|
|
|
}
|
|
|
|
|
2019-12-24 10:53:03 -06:00
|
|
|
let path_scalar = this.read_scalar(path_op)?.not_undef()?;
|
2019-12-25 15:09:54 -06:00
|
|
|
let path: PathBuf = this.read_os_str_from_c_str(path_scalar)?.into();
|
2019-12-24 10:53:03 -06:00
|
|
|
|
2019-12-24 10:01:01 -06:00
|
|
|
let buf = this.deref_operand(buf_op)?;
|
|
|
|
|
2019-12-25 15:09:54 -06:00
|
|
|
let stats = match FileStatus::new(this, path, false)? {
|
|
|
|
Some(stats) => stats,
|
|
|
|
None => return Ok(-1),
|
2019-12-24 10:53:03 -06:00
|
|
|
};
|
|
|
|
|
2019-12-25 10:39:57 -06:00
|
|
|
// FIXME: use Scalar::to_u16
|
2019-12-25 15:09:54 -06:00
|
|
|
let mode: u16 = stats.mode.to_bits(Size::from_bits(16))? as u16;
|
2019-12-24 10:53:03 -06:00
|
|
|
|
2019-12-25 15:09:54 -06:00
|
|
|
let (access_sec, access_nsec) = stats.accessed.unwrap_or((0, 0));
|
|
|
|
let (created_sec, created_nsec) = stats.created.unwrap_or((0, 0));
|
|
|
|
let (modified_sec, modified_nsec) = stats.modified.unwrap_or((0, 0));
|
2019-12-24 10:53:03 -06:00
|
|
|
|
2019-12-24 10:01:01 -06:00
|
|
|
let dev_t_layout = this.libc_ty_layout("dev_t")?;
|
|
|
|
let mode_t_layout = this.libc_ty_layout("mode_t")?;
|
|
|
|
let nlink_t_layout = this.libc_ty_layout("nlink_t")?;
|
|
|
|
let ino_t_layout = this.libc_ty_layout("ino_t")?;
|
|
|
|
let uid_t_layout = this.libc_ty_layout("uid_t")?;
|
|
|
|
let gid_t_layout = this.libc_ty_layout("gid_t")?;
|
|
|
|
let time_t_layout = this.libc_ty_layout("time_t")?;
|
|
|
|
let long_layout = this.libc_ty_layout("c_long")?;
|
|
|
|
let off_t_layout = this.libc_ty_layout("off_t")?;
|
|
|
|
let blkcnt_t_layout = this.libc_ty_layout("blkcnt_t")?;
|
|
|
|
let blksize_t_layout = this.libc_ty_layout("blksize_t")?;
|
|
|
|
let uint32_t_layout = this.libc_ty_layout("uint32_t")?;
|
|
|
|
|
2019-12-25 17:22:33 -06:00
|
|
|
// We need to add 32 bits of padding after `st_rdev` if we are in a 64-bit platform.
|
|
|
|
let pad_layout = if this.tcx.sess.target.ptr_width == 64 {
|
|
|
|
uint32_t_layout
|
2019-12-25 10:39:57 -06:00
|
|
|
} else {
|
2019-12-25 17:22:33 -06:00
|
|
|
this.layout_of(this.tcx.mk_unit())?
|
2019-12-25 10:39:57 -06:00
|
|
|
};
|
|
|
|
|
2019-12-24 10:01:01 -06:00
|
|
|
let imms = [
|
|
|
|
immty_from_uint_checked(0u128, dev_t_layout)?, // st_dev
|
2019-12-24 10:53:03 -06:00
|
|
|
immty_from_uint_checked(mode, mode_t_layout)?, // st_mode
|
2019-12-24 10:01:01 -06:00
|
|
|
immty_from_uint_checked(0u128, nlink_t_layout)?, // st_nlink
|
|
|
|
immty_from_uint_checked(0u128, ino_t_layout)?, // st_ino
|
|
|
|
immty_from_uint_checked(0u128, uid_t_layout)?, // st_uid
|
|
|
|
immty_from_uint_checked(0u128, gid_t_layout)?, // st_gid
|
2019-12-25 17:22:33 -06:00
|
|
|
immty_from_uint_checked(0u128, dev_t_layout)?, // st_rdev
|
|
|
|
immty_from_uint_checked(0u128, pad_layout)?, // padding for 64-bit targets
|
2019-12-24 10:53:03 -06:00
|
|
|
immty_from_uint_checked(access_sec, time_t_layout)?, // st_atime
|
|
|
|
immty_from_uint_checked(access_nsec, long_layout)?, // st_atime_nsec
|
|
|
|
immty_from_uint_checked(modified_sec, time_t_layout)?, // st_mtime
|
|
|
|
immty_from_uint_checked(modified_nsec, long_layout)?, // st_mtime_nsec
|
2019-12-24 10:01:01 -06:00
|
|
|
immty_from_uint_checked(0u128, time_t_layout)?, // st_ctime
|
|
|
|
immty_from_uint_checked(0u128, long_layout)?, // st_ctime_nsec
|
2019-12-24 10:53:03 -06:00
|
|
|
immty_from_uint_checked(created_sec, time_t_layout)?, // st_birthtime
|
|
|
|
immty_from_uint_checked(created_nsec, long_layout)?, // st_birthtime_nsec
|
2019-12-25 15:09:54 -06:00
|
|
|
immty_from_uint_checked(stats.size, off_t_layout)?, // st_size
|
2019-12-24 10:01:01 -06:00
|
|
|
immty_from_uint_checked(0u128, blkcnt_t_layout)?, // st_blocks
|
|
|
|
immty_from_uint_checked(0u128, blksize_t_layout)?, // st_blksize
|
|
|
|
immty_from_uint_checked(0u128, uint32_t_layout)?, // st_flags
|
|
|
|
immty_from_uint_checked(0u128, uint32_t_layout)?, // st_gen
|
|
|
|
];
|
|
|
|
|
|
|
|
this.write_packed_immediates(&buf, &imms)?;
|
|
|
|
|
|
|
|
Ok(0)
|
|
|
|
}
|
|
|
|
|
2019-11-30 14:09:52 -06:00
|
|
|
fn statx(
|
|
|
|
&mut self,
|
2019-12-23 05:56:23 -06:00
|
|
|
dirfd_op: OpTy<'tcx, Tag>, // Should be an `int`
|
2019-11-30 14:09:52 -06:00
|
|
|
pathname_op: OpTy<'tcx, Tag>, // Should be a `const char *`
|
2019-12-23 05:56:23 -06:00
|
|
|
flags_op: OpTy<'tcx, Tag>, // Should be an `int`
|
|
|
|
_mask_op: OpTy<'tcx, Tag>, // Should be an `unsigned int`
|
|
|
|
statxbuf_op: OpTy<'tcx, Tag>, // Should be a `struct statx *`
|
2019-11-30 14:09:52 -06:00
|
|
|
) -> InterpResult<'tcx, i32> {
|
|
|
|
let this = self.eval_context_mut();
|
|
|
|
|
|
|
|
this.check_no_isolation("statx")?;
|
|
|
|
|
2019-12-25 15:09:54 -06:00
|
|
|
if this.tcx.sess.target.target.target_os.to_lowercase() != "linux" {
|
|
|
|
throw_unsup_format!("The `statx` shim is only only available for `linux` targets.")
|
|
|
|
}
|
|
|
|
|
2019-11-30 14:09:52 -06:00
|
|
|
let statxbuf_scalar = this.read_scalar(statxbuf_op)?.not_undef()?;
|
|
|
|
let pathname_scalar = this.read_scalar(pathname_op)?.not_undef()?;
|
|
|
|
|
|
|
|
// If the statxbuf or pathname pointers are null, the function fails with `EFAULT`.
|
|
|
|
if this.is_null(statxbuf_scalar)? || this.is_null(pathname_scalar)? {
|
|
|
|
let efault = this.eval_libc("EFAULT")?;
|
|
|
|
this.set_last_error(efault)?;
|
|
|
|
return Ok(-1);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Under normal circumstances, we would use `deref_operand(statxbuf_op)` to produce a
|
|
|
|
// proper `MemPlace` and then write the results of this function to it. However, the
|
|
|
|
// `syscall` function is untyped. This means that all the `statx` parameters are provided
|
|
|
|
// as `isize`s instead of having the proper types. Thus, we have to recover the layout of
|
|
|
|
// `statxbuf_op` by using the `libc::statx` struct type.
|
|
|
|
let statxbuf_place = {
|
|
|
|
// FIXME: This long path is required because `libc::statx` is an struct and also a
|
|
|
|
// function and `resolve_path` is returning the latter.
|
|
|
|
let statx_ty = this
|
|
|
|
.resolve_path(&["libc", "unix", "linux_like", "linux", "gnu", "statx"])?
|
|
|
|
.ty(*this.tcx);
|
|
|
|
let statxbuf_ty = this.tcx.mk_mut_ptr(statx_ty);
|
|
|
|
let statxbuf_layout = this.layout_of(statxbuf_ty)?;
|
|
|
|
let statxbuf_imm = ImmTy::from_scalar(statxbuf_scalar, statxbuf_layout);
|
|
|
|
this.ref_to_mplace(statxbuf_imm)?
|
|
|
|
};
|
|
|
|
|
|
|
|
let path: PathBuf = this.read_os_str_from_c_str(pathname_scalar)?.into();
|
|
|
|
// `flags` should be a `c_int` but the `syscall` function provides an `isize`.
|
2019-12-23 05:56:23 -06:00
|
|
|
let flags: i32 =
|
|
|
|
this.read_scalar(flags_op)?.to_machine_isize(&*this.tcx)?.try_into().map_err(|e| {
|
|
|
|
err_unsup_format!("Failed to convert pointer sized operand to integer: {}", e)
|
|
|
|
})?;
|
2019-11-30 14:09:52 -06:00
|
|
|
// `dirfd` should be a `c_int` but the `syscall` function provides an `isize`.
|
2019-12-23 05:56:23 -06:00
|
|
|
let dirfd: i32 =
|
|
|
|
this.read_scalar(dirfd_op)?.to_machine_isize(&*this.tcx)?.try_into().map_err(|e| {
|
|
|
|
err_unsup_format!("Failed to convert pointer sized operand to integer: {}", e)
|
|
|
|
})?;
|
2019-11-30 14:09:52 -06:00
|
|
|
// we only support interpreting `path` as an absolute directory or as a directory relative
|
|
|
|
// to `dirfd` when the latter is `AT_FDCWD`. The behavior of `statx` with a relative path
|
|
|
|
// and a directory file descriptor other than `AT_FDCWD` is specified but it cannot be
|
|
|
|
// tested from `libstd`. If you found this error, please open an issue reporting it.
|
2019-12-23 05:56:23 -06:00
|
|
|
if !(path.is_absolute() || dirfd == this.eval_libc_i32("AT_FDCWD")?) {
|
2019-11-30 14:09:52 -06:00
|
|
|
throw_unsup_format!(
|
|
|
|
"Using statx with a relative path and a file descriptor different from `AT_FDCWD` is not supported"
|
|
|
|
)
|
|
|
|
}
|
|
|
|
|
|
|
|
// the `_mask_op` paramter specifies the file information that the caller requested.
|
|
|
|
// However `statx` is allowed to return information that was not requested or to not
|
|
|
|
// return information that was requested. This `mask` represents the information we can
|
|
|
|
// actually provide in any host platform.
|
|
|
|
let mut mask =
|
|
|
|
this.eval_libc("STATX_TYPE")?.to_u32()? | this.eval_libc("STATX_SIZE")?.to_u32()?;
|
|
|
|
|
|
|
|
// If the `AT_SYMLINK_NOFOLLOW` flag is set, we query the file's metadata without following
|
|
|
|
// symbolic links.
|
2019-12-25 15:09:54 -06:00
|
|
|
let is_symlink = flags & this.eval_libc("AT_SYMLINK_NOFOLLOW")?.to_i32()? != 0;
|
2019-11-30 14:09:52 -06:00
|
|
|
|
2019-12-25 15:09:54 -06:00
|
|
|
let stats = match FileStatus::new(this, path, is_symlink)? {
|
|
|
|
Some(stats) => stats,
|
|
|
|
None => return Ok(-1),
|
2019-11-30 14:09:52 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
// The `mode` field specifies the type of the file and the permissions over the file for
|
|
|
|
// the owner, its group and other users. Given that we can only provide the file type
|
|
|
|
// without using platform specific methods, we only set the bits corresponding to the file
|
|
|
|
// type. This should be an `__u16` but `libc` provides its values as `u32`.
|
2019-12-25 15:09:54 -06:00
|
|
|
let mode: u16 = stats
|
|
|
|
.mode
|
2019-12-23 05:56:23 -06:00
|
|
|
.to_u32()?
|
|
|
|
.try_into()
|
2019-12-25 15:09:54 -06:00
|
|
|
.unwrap_or_else(|_| bug!("libc contains bad value for constant"));
|
2019-11-30 14:09:52 -06:00
|
|
|
|
2019-12-25 15:09:54 -06:00
|
|
|
let (access_sec, access_nsec) = if let Some(tup) = stats.accessed {
|
|
|
|
tup
|
|
|
|
} else {
|
|
|
|
mask |= this.eval_libc("STATX_ATIME")?.to_u32()?;
|
|
|
|
(0, 0)
|
|
|
|
};
|
2019-11-30 14:09:52 -06:00
|
|
|
|
2019-12-25 15:09:54 -06:00
|
|
|
let (created_sec, created_nsec) = if let Some(tup) = stats.created {
|
|
|
|
tup
|
|
|
|
} else {
|
|
|
|
mask |= this.eval_libc("STATX_BTIME")?.to_u32()?;
|
|
|
|
(0, 0)
|
|
|
|
};
|
2019-11-30 14:09:52 -06:00
|
|
|
|
2019-12-25 15:09:54 -06:00
|
|
|
let (modified_sec, modified_nsec) = if let Some(tup) = stats.modified {
|
|
|
|
tup
|
|
|
|
} else {
|
|
|
|
mask |= this.eval_libc("STATX_MTIME")?.to_u32()?;
|
|
|
|
(0, 0)
|
|
|
|
};
|
2019-11-30 14:09:52 -06:00
|
|
|
|
|
|
|
let __u32_layout = this.libc_ty_layout("__u32")?;
|
|
|
|
let __u64_layout = this.libc_ty_layout("__u64")?;
|
|
|
|
let __u16_layout = this.libc_ty_layout("__u16")?;
|
|
|
|
|
|
|
|
// Now we transform all this fields into `ImmTy`s and write them to `statxbuf`. We write a
|
|
|
|
// zero for the unavailable fields.
|
|
|
|
let imms = [
|
2019-12-23 05:56:23 -06:00
|
|
|
immty_from_uint_checked(mask, __u32_layout)?, // stx_mask
|
2019-11-30 14:09:52 -06:00
|
|
|
immty_from_uint_checked(0u128, __u32_layout)?, // stx_blksize
|
|
|
|
immty_from_uint_checked(0u128, __u64_layout)?, // stx_attributes
|
|
|
|
immty_from_uint_checked(0u128, __u32_layout)?, // stx_nlink
|
|
|
|
immty_from_uint_checked(0u128, __u32_layout)?, // stx_uid
|
|
|
|
immty_from_uint_checked(0u128, __u32_layout)?, // stx_gid
|
2019-12-23 05:56:23 -06:00
|
|
|
immty_from_uint_checked(mode, __u16_layout)?, // stx_mode
|
2019-11-30 14:09:52 -06:00
|
|
|
immty_from_uint_checked(0u128, __u16_layout)?, // statx padding
|
|
|
|
immty_from_uint_checked(0u128, __u64_layout)?, // stx_ino
|
2019-12-25 15:09:54 -06:00
|
|
|
immty_from_uint_checked(stats.size, __u64_layout)?, // stx_size
|
2019-11-30 14:09:52 -06:00
|
|
|
immty_from_uint_checked(0u128, __u64_layout)?, // stx_blocks
|
|
|
|
immty_from_uint_checked(0u128, __u64_layout)?, // stx_attributes
|
|
|
|
immty_from_uint_checked(access_sec, __u64_layout)?, // stx_atime.tv_sec
|
|
|
|
immty_from_uint_checked(access_nsec, __u32_layout)?, // stx_atime.tv_nsec
|
|
|
|
immty_from_uint_checked(0u128, __u32_layout)?, // statx_timestamp padding
|
|
|
|
immty_from_uint_checked(created_sec, __u64_layout)?, // stx_btime.tv_sec
|
|
|
|
immty_from_uint_checked(created_nsec, __u32_layout)?, // stx_btime.tv_nsec
|
|
|
|
immty_from_uint_checked(0u128, __u32_layout)?, // statx_timestamp padding
|
|
|
|
immty_from_uint_checked(0u128, __u64_layout)?, // stx_ctime.tv_sec
|
|
|
|
immty_from_uint_checked(0u128, __u32_layout)?, // stx_ctime.tv_nsec
|
|
|
|
immty_from_uint_checked(0u128, __u32_layout)?, // statx_timestamp padding
|
|
|
|
immty_from_uint_checked(modified_sec, __u64_layout)?, // stx_mtime.tv_sec
|
|
|
|
immty_from_uint_checked(modified_nsec, __u32_layout)?, // stx_mtime.tv_nsec
|
|
|
|
immty_from_uint_checked(0u128, __u32_layout)?, // statx_timestamp padding
|
|
|
|
immty_from_uint_checked(0u128, __u64_layout)?, // stx_rdev_major
|
|
|
|
immty_from_uint_checked(0u128, __u64_layout)?, // stx_rdev_minor
|
|
|
|
immty_from_uint_checked(0u128, __u64_layout)?, // stx_dev_major
|
|
|
|
immty_from_uint_checked(0u128, __u64_layout)?, // stx_dev_minor
|
|
|
|
];
|
|
|
|
|
|
|
|
this.write_packed_immediates(&statxbuf_place, &imms)?;
|
|
|
|
|
|
|
|
Ok(0)
|
|
|
|
}
|
|
|
|
|
2019-10-24 08:44:13 -05:00
|
|
|
/// Function used when a handle is not found inside `FileHandler`. It returns `Ok(-1)`and sets
|
|
|
|
/// the last OS error to `libc::EBADF` (invalid file descriptor). This function uses
|
|
|
|
/// `T: From<i32>` instead of `i32` directly because some fs functions return different integer
|
|
|
|
/// types (like `read`, that returns an `i64`).
|
|
|
|
fn handle_not_found<T: From<i32>>(&mut self) -> InterpResult<'tcx, T> {
|
2019-09-30 15:18:23 -05:00
|
|
|
let this = self.eval_context_mut();
|
2019-10-24 08:44:13 -05:00
|
|
|
let ebadf = this.eval_libc("EBADF")?;
|
|
|
|
this.set_last_error(ebadf)?;
|
|
|
|
Ok((-1).into())
|
2019-09-30 14:07:08 -05:00
|
|
|
}
|
2019-09-24 17:28:00 -05:00
|
|
|
}
|
2019-11-30 14:09:52 -06:00
|
|
|
|
2019-12-25 15:09:54 -06:00
|
|
|
// Extracts the number of seconds and nanoseconds elapsed between `time` and the unix epoch when
|
|
|
|
// `time` is Ok. If `time` is an error, it returns `None`.
|
|
|
|
fn extract_sec_and_nsec<'tcx>(time: std::io::Result<SystemTime>) -> InterpResult<'tcx, Option<(u64, u32)>> {
|
|
|
|
time.ok().map(|time| {
|
2019-11-30 14:09:52 -06:00
|
|
|
let duration = system_time_to_duration(&time)?;
|
|
|
|
Ok((duration.as_secs(), duration.subsec_nanos()))
|
2019-12-25 15:09:54 -06:00
|
|
|
}).transpose()
|
|
|
|
}
|
|
|
|
|
|
|
|
struct FileStatus {
|
|
|
|
mode: Scalar<Tag>,
|
|
|
|
size: u64,
|
|
|
|
created: Option<(u64, u32)>,
|
|
|
|
accessed: Option<(u64, u32)>,
|
|
|
|
modified: Option<(u64, u32)>,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl FileStatus {
|
|
|
|
fn new<'tcx, 'mir>(ecx: &mut MiriEvalContext<'mir, 'tcx>, path: PathBuf, is_symlink: bool) -> InterpResult<'tcx, Option<FileStatus>> {
|
|
|
|
let metadata = if is_symlink {
|
|
|
|
// FIXME: metadata for symlinks need testing.
|
|
|
|
std::fs::symlink_metadata(path)
|
|
|
|
} else {
|
|
|
|
std::fs::metadata(path)
|
|
|
|
};
|
|
|
|
|
|
|
|
let metadata = match metadata {
|
|
|
|
Ok(metadata) => metadata,
|
|
|
|
Err(e) => {
|
|
|
|
ecx.set_last_error_from_io_error(e)?;
|
|
|
|
return Ok(None);
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
let file_type = metadata.file_type();
|
|
|
|
|
|
|
|
let mode_name = if file_type.is_file() {
|
|
|
|
"S_IFREG"
|
|
|
|
} else if file_type.is_dir() {
|
|
|
|
"S_IFDIR"
|
|
|
|
} else {
|
|
|
|
"S_IFLNK"
|
|
|
|
};
|
|
|
|
|
|
|
|
let mode = ecx.eval_libc(mode_name)?;
|
|
|
|
|
|
|
|
let size = metadata.len();
|
|
|
|
|
|
|
|
let created = extract_sec_and_nsec(metadata.created())?;
|
|
|
|
let accessed = extract_sec_and_nsec(metadata.accessed())?;
|
|
|
|
let modified = extract_sec_and_nsec(metadata.modified())?;
|
|
|
|
|
|
|
|
// FIXME: Provide more fields using platform specific methods.
|
|
|
|
Ok(Some(FileStatus { mode, size, created, accessed, modified }))
|
2019-11-30 14:09:52 -06:00
|
|
|
}
|
|
|
|
}
|