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                let [path, buf] = this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
95                let result = this.macos_fbsd_solarish_stat(path, buf)?;
96                this.write_scalar(result, dest)?;
97            }
98            "lstat" => {
99                let [path, buf] = this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
100                let result = this.macos_fbsd_solarish_lstat(path, buf)?;
101                this.write_scalar(result, dest)?;
102            }
103            "readdir" => {
104                let [dirp] = this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
105                let result = this.readdir64("dirent", dirp)?;
106                this.write_scalar(result, dest)?;
107            }
108
109            // Sockets and pipes
110            "__xnet_socketpair" => {
111                let [domain, type_, protocol, sv] =
112                    this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
113                let result = this.socketpair(domain, type_, protocol, sv)?;
114                this.write_scalar(result, dest)?;
115            }
116
117            // Miscellaneous
118            "___errno" => {
119                let [] = this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
120                let errno_place = this.last_error_place()?;
121                this.write_scalar(errno_place.to_ref(this).to_scalar(), dest)?;
122            }
123
124            "stack_getbounds" => {
125                let [stack] = this.check_shim_sig_lenient(abi, CanonAbi::C, link_name, args)?;
126                let stack = this.deref_pointer_as(stack, this.libc_ty_layout("stack_t"))?;
127
128                this.write_int_fields_named(
129                    &[
130                        ("ss_sp", this.machine.stack_addr.into()),
131                        ("ss_size", this.machine.stack_size.into()),
132                        // field set to 0 means not in an alternate signal stack
133                        // https://docs.oracle.com/cd/E86824_01/html/E54766/stack-getbounds-3c.html
134                        ("ss_flags", 0),
135                    ],
136                    &stack,
137                )?;
138
139                this.write_null(dest)?;
140            }
141
142            "pset_info" => {
143                let [pset, tpe, cpus, list] =
144                    this.check_shim_sig_lenient(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_sig_lenient(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
