miri/shims/unix/solarish/
foreign_items.rs

1use rustc_abi::CanonAbi;
2use rustc_middle::ty::Ty;
3use rustc_span::Symbol;
4use rustc_target::callconv::FnAbi;
5use rustc_target::spec::Os;
6
7use crate::shims::unix::foreign_items::EvalContextExt as _;
8use crate::shims::unix::linux_like::epoll::EvalContextExt as _;
9use crate::shims::unix::linux_like::eventfd::EvalContextExt as _;
10use crate::shims::unix::*;
11use crate::*;
12
13pub fn is_dyn_sym(name: &str) -> bool {
14    matches!(name, "pthread_setname_np")
15}
16
17impl<'tcx> EvalContextExt<'tcx> for crate::MiriInterpCx<'tcx> {}
18pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
19    fn emulate_foreign_item_inner(
20        &mut self,
21        link_name: Symbol,
22        abi: &FnAbi<'tcx, Ty<'tcx>>,
23        args: &[OpTy<'tcx>],
24        dest: &MPlaceTy<'tcx>,
25    ) -> InterpResult<'tcx, EmulateItemResult> {
26        let this = self.eval_context_mut();
27        match link_name.as_str() {
28            // epoll, eventfd (NOT available on Solaris!)
29            "epoll_create1" => {
30                this.assert_target_os(Os::Illumos, "epoll_create1");
31                let [flag] = this.check_shim_sig_deprecated(abi, CanonAbi::C, link_name, args)?;
32                let result = this.epoll_create1(flag)?;
33                this.write_scalar(result, dest)?;
34            }
35            "epoll_ctl" => {
36                this.assert_target_os(Os::Illumos, "epoll_ctl");
37                let [epfd, op, fd, event] =
38                    this.check_shim_sig_deprecated(abi, CanonAbi::C, link_name, args)?;
39                let result = this.epoll_ctl(epfd, op, fd, event)?;
40                this.write_scalar(result, dest)?;
41            }
42            "epoll_wait" => {
43                this.assert_target_os(Os::Illumos, "epoll_wait");
44                let [epfd, events, maxevents, timeout] =
45                    this.check_shim_sig_deprecated(abi, CanonAbi::C, link_name, args)?;
46                this.epoll_wait(epfd, events, maxevents, timeout, dest)?;
47            }
48            "eventfd" => {
49                this.assert_target_os(Os::Illumos, "eventfd");
50                let [val, flag] =
51                    this.check_shim_sig_deprecated(abi, CanonAbi::C, link_name, args)?;
52                let result = this.eventfd(val, flag)?;
53                this.write_scalar(result, dest)?;
54            }
55
56            // Threading
57            "pthread_setname_np" => {
58                let [thread, name] =
59                    this.check_shim_sig_deprecated(abi, CanonAbi::C, link_name, args)?;
60                // THREAD_NAME_MAX allows a thread name of 31+1 length
61                // https://github.com/illumos/illumos-gate/blob/7671517e13b8123748eda4ef1ee165c6d9dba7fe/usr/src/uts/common/sys/thread.h#L613
62                let max_len = 32;
63                // See https://illumos.org/man/3C/pthread_setname_np for the error codes.
64                let res = match this.pthread_setname_np(
65                    this.read_scalar(thread)?,
66                    this.read_scalar(name)?,
67                    max_len,
68                    /* truncate */ false,
69                )? {
70                    ThreadNameResult::Ok => Scalar::from_u32(0),
71                    ThreadNameResult::NameTooLong => this.eval_libc("ERANGE"),
72                };
73                this.write_scalar(res, dest)?;
74            }
75            "pthread_getname_np" => {
76                let [thread, name, len] =
77                    this.check_shim_sig_deprecated(abi, CanonAbi::C, link_name, args)?;
78                // See https://illumos.org/man/3C/pthread_getname_np for the error codes.
79                let res = match this.pthread_getname_np(
80                    this.read_scalar(thread)?,
81                    this.read_scalar(name)?,
82                    this.read_scalar(len)?,
83                    /* truncate */ false,
84                )? {
85                    ThreadNameResult::Ok => Scalar::from_u32(0),
86                    ThreadNameResult::NameTooLong => this.eval_libc("ERANGE"),
87                };
88                this.write_scalar(res, dest)?;
89            }
90
91            // File related shims
92            "stat" => {
93                // FIXME: This does not have a direct test (#3179).
94                let [path, buf] =
95                    this.check_shim_sig_deprecated(abi, CanonAbi::C, link_name, args)?;
96                let result = this.stat(path, buf)?;
97                this.write_scalar(result, dest)?;
98            }
99            "lstat" => {
100                // FIXME: This does not have a direct test (#3179).
101                let [path, buf] =
102                    this.check_shim_sig_deprecated(abi, CanonAbi::C, link_name, args)?;
103                let result = this.lstat(path, buf)?;
104                this.write_scalar(result, dest)?;
105            }
106
107            // Sockets and pipes
108            "__xnet_socketpair" => {
109                let [domain, type_, protocol, sv] =
110                    this.check_shim_sig_deprecated(abi, CanonAbi::C, link_name, args)?;
111                let result = this.socketpair(domain, type_, protocol, sv)?;
112                this.write_scalar(result, dest)?;
113            }
114
115            // Network sockets
116            "__xnet_socket" | "__xnet7_socket" => {
117                let [domain, type_, protocol] = this.check_shim_sig(
118                    shim_sig!(extern "C" fn(i32, i32, i32) -> i32),
119                    (link_name, abi, args),
120                )?;
121                let result = this.socket(domain, type_, protocol)?;
122                this.write_scalar(result, dest)?;
123            }
124            "__xnet_bind" => {
125                let [socket, address, address_len] = this.check_shim_sig(
126                    shim_sig!(extern "C" fn(i32, *_, libc::socklen_t) -> i32),
127                    (link_name, abi, args),
128                )?;
129                let result = this.bind(socket, address, address_len)?;
130                this.write_scalar(result, dest)?;
131            }
132            "__xnet_connect" => {
133                let [socket, address, address_len] = this.check_shim_sig(
134                    shim_sig!(extern "C" fn(i32, *_, libc::socklen_t) -> i32),
135                    (link_name, abi, args),
136                )?;
137                this.connect(socket, address, address_len, dest)?;
138            }
139            "__xnet_getaddrinfo" => {
140                let [node, service, hints, res] = this.check_shim_sig(
141                    shim_sig!(extern "C" fn(*_, *_, *_, *_) -> i32),
142                    (link_name, abi, args),
143                )?;
144                let result = this.getaddrinfo(node, service, hints, res)?;
145                this.write_scalar(result, dest)?;
146            }
147            "__xnet_getsockopt" => {
148                let [socket, level, option_name, option_value, option_len] = this.check_shim_sig(
149                    shim_sig!(extern "C" fn(i32, i32, i32, *_, *_) -> i32),
150                    (link_name, abi, args),
151                )?;
152                let result =
153                    this.getsockopt(socket, level, option_name, option_value, option_len)?;
154                this.write_scalar(result, dest)?;
155            }
156
157            // Miscellaneous
158            "___errno" => {
159                let [] = this.check_shim_sig_deprecated(abi, CanonAbi::C, link_name, args)?;
160                let errno_place = this.last_error_place()?;
161                this.write_scalar(errno_place.to_ref(this).to_scalar(), dest)?;
162            }
163
164            "stack_getbounds" => {
165                // FIXME: This does not have a direct test (#3179).
166                let [stack] = this.check_shim_sig_deprecated(abi, CanonAbi::C, link_name, args)?;
167                let stack = this.deref_pointer_as(stack, this.libc_ty_layout("stack_t"))?;
168
169                this.write_int_fields_named(
170                    &[
171                        ("ss_sp", this.machine.stack_addr.into()),
172                        ("ss_size", this.machine.stack_size.into()),
173                        // field set to 0 means not in an alternate signal stack
174                        // https://docs.oracle.com/cd/E86824_01/html/E54766/stack-getbounds-3c.html
175                        ("ss_flags", 0),
176                    ],
177                    &stack,
178                )?;
179
180                this.write_null(dest)?;
181            }
182
183            "pset_info" => {
184                // FIXME: This does not have a direct test (#3179).
185                let [pset, tpe, cpus, list] =
186                    this.check_shim_sig_deprecated(abi, CanonAbi::C, link_name, args)?;
187                // We do not need to handle the current process cpu mask, available_parallelism
188                // implementation pass null anyway. We only care for the number of
189                // cpus.
190                // https://docs.oracle.com/cd/E88353_01/html/E37841/pset-info-2.html
191
192                let pset = this.read_scalar(pset)?.to_i32()?;
193                let tpe = this.read_pointer(tpe)?;
194                let list = this.read_pointer(list)?;
195
196                let ps_myid = this.eval_libc_i32("PS_MYID");
197                if ps_myid != pset {
198                    throw_unsup_format!("pset_info is only supported with pset==PS_MYID");
199                }
200
201                if !this.ptr_is_null(tpe)? {
202                    throw_unsup_format!("pset_info is only supported with type==NULL");
203                }
204
205                if !this.ptr_is_null(list)? {
206                    throw_unsup_format!("pset_info is only supported with list==NULL");
207                }
208
209                let cpus = this.deref_pointer_as(cpus, this.machine.layouts.u32)?;
210                this.write_scalar(Scalar::from_u32(this.machine.num_cpus), &cpus)?;
211                this.write_null(dest)?;
212            }
213
214            "__sysconf_xpg7" => {
215                let [val] = this.check_shim_sig_deprecated(abi, CanonAbi::C, link_name, args)?;
216                let result = this.sysconf(val)?;
217                this.write_scalar(result, dest)?;
218            }
219
220            _ => return interp_ok(EmulateItemResult::NotSupported),
221        }
222        interp_ok(EmulateItemResult::NeedsReturn)
223    }
224}
miri/shims/unix/solarish/foreign_items.rs

miri/shims/unix/solarish/
foreign_items.rs
