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_lenient(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_lenient(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_lenient(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] = this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
51                let result = this.eventfd(val, flag)?;
52                this.write_scalar(result, dest)?;
53            }
54
55            // Threading
56            "pthread_setname_np" => {
57                let [thread, name] =
58                    this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
59                // THREAD_NAME_MAX allows a thread name of 31+1 length
60                // https://github.com/illumos/illumos-gate/blob/7671517e13b8123748eda4ef1ee165c6d9dba7fe/usr/src/uts/common/sys/thread.h#L613
61                let max_len = 32;
62                // See https://illumos.org/man/3C/pthread_setname_np for the error codes.
63                let res = match this.pthread_setname_np(
64                    this.read_scalar(thread)?,
65                    this.read_scalar(name)?,
66                    max_len,
67                    /* truncate */ false,
68                )? {
69                    ThreadNameResult::Ok => Scalar::from_u32(0),
70                    ThreadNameResult::NameTooLong => this.eval_libc("ERANGE"),
71                    ThreadNameResult::ThreadNotFound => this.eval_libc("ESRCH"),
72                };
73                this.write_scalar(res, dest)?;
74            }
75            "pthread_getname_np" => {
76                let [thread, name, len] =
77                    this.check_shim_sig_lenient(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                    ThreadNameResult::ThreadNotFound => this.eval_libc("ESRCH"),
88                };
89                this.write_scalar(res, dest)?;
90            }
91
92            // File related shims
93            "stat" => {
94                // FIXME: This does not have a direct test (#3179).
95                let [path, buf] = this.check_shim_sig_lenient(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] = this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
102                let result = this.lstat(path, buf)?;
103                this.write_scalar(result, dest)?;
104            }
105
106            // Sockets and pipes
107            "__xnet_socketpair" => {
108                let [domain, type_, protocol, sv] =
109                    this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
110                let result = this.socketpair(domain, type_, protocol, sv)?;
111                this.write_scalar(result, dest)?;
112            }
113
114            // Miscellaneous
115            "___errno" => {
116                let [] = this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
117                let errno_place = this.last_error_place()?;
118                this.write_scalar(errno_place.to_ref(this).to_scalar(), dest)?;
119            }
120
121            "stack_getbounds" => {
122                // FIXME: This does not have a direct test (#3179).
123                let [stack] = this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
124                let stack = this.deref_pointer_as(stack, this.libc_ty_layout("stack_t"))?;
125
126                this.write_int_fields_named(
127                    &[
128                        ("ss_sp", this.machine.stack_addr.into()),
129                        ("ss_size", this.machine.stack_size.into()),
130                        // field set to 0 means not in an alternate signal stack
131                        // https://docs.oracle.com/cd/E86824_01/html/E54766/stack-getbounds-3c.html
132                        ("ss_flags", 0),
133                    ],
134                    &stack,
135                )?;
136
137                this.write_null(dest)?;
138            }
139
140            "pset_info" => {
141                // FIXME: This does not have a direct test (#3179).
142                let [pset, tpe, cpus, list] =
143                    this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
144                // We do not need to handle the current process cpu mask, available_parallelism
145                // implementation pass null anyway. We only care for the number of
146                // cpus.
147                // https://docs.oracle.com/cd/E88353_01/html/E37841/pset-info-2.html
148
149                let pset = this.read_scalar(pset)?.to_i32()?;
150                let tpe = this.read_pointer(tpe)?;
151                let list = this.read_pointer(list)?;
152
153                let ps_myid = this.eval_libc_i32("PS_MYID");
154                if ps_myid != pset {
155                    throw_unsup_format!("pset_info is only supported with pset==PS_MYID");
156                }
157
158                if !this.ptr_is_null(tpe)? {
159                    throw_unsup_format!("pset_info is only supported with type==NULL");
160                }
161
162                if !this.ptr_is_null(list)? {
163                    throw_unsup_format!("pset_info is only supported with list==NULL");
164                }
165
166                let cpus = this.deref_pointer_as(cpus, this.machine.layouts.u32)?;
167                this.write_scalar(Scalar::from_u32(this.machine.num_cpus), &cpus)?;
168                this.write_null(dest)?;
169            }
170
171            "__sysconf_xpg7" => {
172                let [val] = this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
173                let result = this.sysconf(val)?;
174                this.write_scalar(result, dest)?;
175            }
176
177            _ => return interp_ok(EmulateItemResult::NotSupported),
178        }
179        interp_ok(EmulateItemResult::NeedsReturn)
180    }
181}
miri/shims/unix/solarish/foreign_items.rs

miri/shims/unix/solarish/
foreign_items.rs
