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;
5
6use crate::shims::unix::foreign_items::EvalContextExt as _;
7use crate::shims::unix::linux_like::epoll::EvalContextExt as _;
8use crate::shims::unix::linux_like::eventfd::EvalContextExt as _;
9use crate::shims::unix::*;
10use crate::*;
11
12pub fn is_dyn_sym(name: &str) -> bool {
13    matches!(name, "pthread_setname_np")
14}
15
16impl<'tcx> EvalContextExt<'tcx> for crate::MiriInterpCx<'tcx> {}
17pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
18    fn emulate_foreign_item_inner(
19        &mut self,
20        link_name: Symbol,
21        abi: &FnAbi<'tcx, Ty<'tcx>>,
22        args: &[OpTy<'tcx>],
23        dest: &MPlaceTy<'tcx>,
24    ) -> InterpResult<'tcx, EmulateItemResult> {
25        let this = self.eval_context_mut();
26        match link_name.as_str() {
27            // epoll, eventfd (NOT available on Solaris!)
28            "epoll_create1" => {
29                this.assert_target_os("illumos", "epoll_create1");
30                let [flag] = this.check_shim(abi, CanonAbi::C, link_name, args)?;
31                let result = this.epoll_create1(flag)?;
32                this.write_scalar(result, dest)?;
33            }
34            "epoll_ctl" => {
35                this.assert_target_os("illumos", "epoll_ctl");
36                let [epfd, op, fd, event] = this.check_shim(abi, CanonAbi::C, link_name, args)?;
37                let result = this.epoll_ctl(epfd, op, fd, event)?;
38                this.write_scalar(result, dest)?;
39            }
40            "epoll_wait" => {
41                this.assert_target_os("illumos", "epoll_wait");
42                let [epfd, events, maxevents, timeout] =
43                    this.check_shim(abi, CanonAbi::C, link_name, args)?;
44                this.epoll_wait(epfd, events, maxevents, timeout, dest)?;
45            }
46            "eventfd" => {
47                this.assert_target_os("illumos", "eventfd");
48                let [val, flag] = this.check_shim(abi, CanonAbi::C, link_name, args)?;
49                let result = this.eventfd(val, flag)?;
50                this.write_scalar(result, dest)?;
51            }
52
53            // Threading
54            "pthread_setname_np" => {
55                let [thread, name] = this.check_shim(abi, CanonAbi::C, link_name, args)?;
56                // THREAD_NAME_MAX allows a thread name of 31+1 length
57                // https://github.com/illumos/illumos-gate/blob/7671517e13b8123748eda4ef1ee165c6d9dba7fe/usr/src/uts/common/sys/thread.h#L613
58                let max_len = 32;
59                // See https://illumos.org/man/3C/pthread_setname_np for the error codes.
60                let res = match this.pthread_setname_np(
61                    this.read_scalar(thread)?,
62                    this.read_scalar(name)?,
63                    max_len,
64                    /* truncate */ false,
65                )? {
66                    ThreadNameResult::Ok => Scalar::from_u32(0),
67                    ThreadNameResult::NameTooLong => this.eval_libc("ERANGE"),
68                    ThreadNameResult::ThreadNotFound => this.eval_libc("ESRCH"),
69                };
70                this.write_scalar(res, dest)?;
71            }
72            "pthread_getname_np" => {
73                let [thread, name, len] = this.check_shim(abi, CanonAbi::C, link_name, args)?;
74                // See https://illumos.org/man/3C/pthread_getname_np for the error codes.
75                let res = match this.pthread_getname_np(
76                    this.read_scalar(thread)?,
77                    this.read_scalar(name)?,
78                    this.read_scalar(len)?,
79                    /* truncate */ false,
80                )? {
81                    ThreadNameResult::Ok => Scalar::from_u32(0),
82                    ThreadNameResult::NameTooLong => this.eval_libc("ERANGE"),
83                    ThreadNameResult::ThreadNotFound => this.eval_libc("ESRCH"),
84                };
85                this.write_scalar(res, dest)?;
86            }
87
88            // File related shims
89            "stat" | "stat64" => {
90                let [path, buf] = this.check_shim(abi, CanonAbi::C, link_name, args)?;
91                let result = this.macos_fbsd_solarish_stat(path, buf)?;
92                this.write_scalar(result, dest)?;
93            }
94            "lstat" | "lstat64" => {
95                let [path, buf] = this.check_shim(abi, CanonAbi::C, link_name, args)?;
96                let result = this.macos_fbsd_solarish_lstat(path, buf)?;
97                this.write_scalar(result, dest)?;
98            }
99            "fstat" | "fstat64" => {
100                let [fd, buf] = this.check_shim(abi, CanonAbi::C, link_name, args)?;
101                let result = this.macos_fbsd_solarish_fstat(fd, buf)?;
102                this.write_scalar(result, dest)?;
103            }
104            "readdir" => {
105                let [dirp] = this.check_shim(abi, CanonAbi::C, link_name, args)?;
106                let result = this.linux_solarish_readdir64("dirent", dirp)?;
107                this.write_scalar(result, dest)?;
108            }
109
110            // Sockets and pipes
111            "__xnet_socketpair" => {
112                let [domain, type_, protocol, sv] =
113                    this.check_shim(abi, CanonAbi::C, link_name, args)?;
114                let result = this.socketpair(domain, type_, protocol, sv)?;
115                this.write_scalar(result, dest)?;
116            }
117
118            // Miscellaneous
119            "___errno" => {
120                let [] = this.check_shim(abi, CanonAbi::C, link_name, args)?;
121                let errno_place = this.last_error_place()?;
122                this.write_scalar(errno_place.to_ref(this).to_scalar(), dest)?;
123            }
124
125            "stack_getbounds" => {
126                let [stack] = this.check_shim(abi, CanonAbi::C, link_name, args)?;
127                let stack = this.deref_pointer_as(stack, this.libc_ty_layout("stack_t"))?;
128
129                this.write_int_fields_named(
130                    &[
131                        ("ss_sp", this.machine.stack_addr.into()),
132                        ("ss_size", this.machine.stack_size.into()),
133                        // field set to 0 means not in an alternate signal stack
134                        // https://docs.oracle.com/cd/E86824_01/html/E54766/stack-getbounds-3c.html
135                        ("ss_flags", 0),
136                    ],
137                    &stack,
138                )?;
139
140                this.write_null(dest)?;
141            }
142
143            "pset_info" => {
144                let [pset, tpe, cpus, list] = this.check_shim(abi, CanonAbi::C, link_name, args)?;
145                // We do not need to handle the current process cpu mask, available_parallelism
146                // implementation pass null anyway. We only care for the number of
147                // cpus.
148                // https://docs.oracle.com/cd/E88353_01/html/E37841/pset-info-2.html
149
150                let pset = this.read_scalar(pset)?.to_i32()?;
151                let tpe = this.read_pointer(tpe)?;
152                let list = this.read_pointer(list)?;
153
154                let ps_myid = this.eval_libc_i32("PS_MYID");
155                if ps_myid != pset {
156                    throw_unsup_format!("pset_info is only supported with pset==PS_MYID");
157                }
158
159                if !this.ptr_is_null(tpe)? {
160                    throw_unsup_format!("pset_info is only supported with type==NULL");
161                }
162
163                if !this.ptr_is_null(list)? {
164                    throw_unsup_format!("pset_info is only supported with list==NULL");
165                }
166
167                let cpus = this.deref_pointer_as(cpus, this.machine.layouts.u32)?;
168                this.write_scalar(Scalar::from_u32(this.machine.num_cpus), &cpus)?;
169                this.write_null(dest)?;
170            }
171
172            "__sysconf_xpg7" => {
173                let [val] = this.check_shim(abi, CanonAbi::C, link_name, args)?;
174                let result = this.sysconf(val)?;
175                this.write_scalar(result, dest)?;
176            }
177
178            _ => return interp_ok(EmulateItemResult::NotSupported),
179        }
180        interp_ok(EmulateItemResult::NeedsReturn)
181    }
182}
miri/shims/unix/solarish/foreign_items.rs

miri/shims/unix/solarish/
foreign_items.rs
