Merge pull request rust-lang#4136 from YohDeadfall/illumos-epoll-eventfd

Illumos: Added epoll and eventfd

Author: RalfJung

src/tools/miri/src/shims/unix/solarish/foreign_items.rs

@@ -3,6 +3,8 @@ use rustc_span::Symbol;
 use rustc_target::callconv::{Conv, FnAbi};
 
 use crate::shims::unix::foreign_items::EvalContextExt as _;
+use crate::shims::unix::linux_like::epoll::EvalContextExt as _;
+use crate::shims::unix::linux_like::eventfd::EvalContextExt as _;
 use crate::shims::unix::*;
 use crate::*;
 
@@ -21,6 +23,32 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
     ) -> InterpResult<'tcx, EmulateItemResult> {
         let this = self.eval_context_mut();
         match link_name.as_str() {
+            // epoll, eventfd (NOT available on Solaris!)
+            "epoll_create1" => {
+                this.assert_target_os("illumos", "epoll_create1");
+                let [flag] = this.check_shim(abi, Conv::C, link_name, args)?;
+                let result = this.epoll_create1(flag)?;
+                this.write_scalar(result, dest)?;
+            }
+            "epoll_ctl" => {
+                this.assert_target_os("illumos", "epoll_ctl");
+                let [epfd, op, fd, event] = this.check_shim(abi, Conv::C, link_name, args)?;
+                let result = this.epoll_ctl(epfd, op, fd, event)?;
+                this.write_scalar(result, dest)?;
+            }
+            "epoll_wait" => {
+                this.assert_target_os("illumos", "epoll_wait");
+                let [epfd, events, maxevents, timeout] =
+                    this.check_shim(abi, Conv::C, link_name, args)?;
+                this.epoll_wait(epfd, events, maxevents, timeout, dest)?;
+            }
+            "eventfd" => {
+                this.assert_target_os("illumos", "eventfd");
+                let [val, flag] = this.check_shim(abi, Conv::C, link_name, args)?;
+                let result = this.eventfd(val, flag)?;
+                this.write_scalar(result, dest)?;
+            }
+
             // Threading
             "pthread_setname_np" => {
                 let [thread, name] = this.check_shim(abi, Conv::C, link_name, args)?;

src/tools/miri/tests/fail-dep/libc/eventfd_block_read_twice.rs

@@ -1,4 +1,4 @@
-//@only-target: linux android
+//@only-target: linux android illumos
 //~^ERROR: deadlocked
 //~^^ERROR: deadlocked
 //@compile-flags: -Zmiri-preemption-rate=0

src/tools/miri/tests/fail-dep/libc/eventfd_block_write_twice.rs

@@ -1,4 +1,4 @@
-//@only-target: linux android
+//@only-target: linux android illumos
 //~^ERROR: deadlocked
 //~^^ERROR: deadlocked
 //@compile-flags: -Zmiri-preemption-rate=0

src/tools/miri/tests/fail-dep/libc/libc-epoll-data-race.rs

@@ -2,7 +2,7 @@
 //! and we only read one of them, we do not synchronize with the other events
 //! and therefore still report a data race for things that need to see the second event
 //! to be considered synchronized.
-//@only-target: linux android
+//@only-target: linux android illumos
 // ensure deterministic schedule
 //@compile-flags: -Zmiri-preemption-rate=0
 

src/tools/miri/tests/fail-dep/libc/libc_epoll_block_two_thread.rs

@@ -1,7 +1,7 @@
 //@compile-flags: -Zmiri-preemption-rate=0
 //~^ERROR: deadlocked
 //~^^ERROR: deadlocked
-//@only-target: linux
+//@only-target: linux android illumos
 //@error-in-other-file: deadlock
 
 use std::convert::TryInto;

src/tools/miri/tests/fail-dep/libc/libc_epoll_unsupported_fd.rs

@@ -1,4 +1,4 @@
-//@only-target: linux android
+//@only-target: linux android illumos
 
 // This is a test for registering unsupported fd with epoll.
 // Register epoll fd with epoll is allowed in real system, but we do not support this.

src/tools/miri/tests/pass-dep/libc/libc-epoll-blocking.rs

@@ -1,4 +1,4 @@
-//@only-target: linux android
+//@only-target: linux android illumos
 // test_epoll_block_then_unblock and test_epoll_race depend on a deterministic schedule.
 //@compile-flags: -Zmiri-preemption-rate=0
 

src/tools/miri/tests/pass-dep/libc/libc-epoll-no-blocking.rs

@@ -1,4 +1,4 @@
-//@only-target: linux android
+//@only-target: linux android illumos
 
 use std::convert::TryInto;
 

src/tools/miri/tests/pass-dep/libc/libc-eventfd.rs

@@ -1,4 +1,4 @@
-//@only-target: linux android
+//@only-target: linux android illumos
 // test_race, test_blocking_read and test_blocking_write depend on a deterministic schedule.
 //@compile-flags: -Zmiri-preemption-rate=0
 
@@ -10,7 +10,10 @@ use std::thread;
 fn main() {
     test_read_write();
     test_race();
+
+    #[cfg(not(target_os = "illumos"))]
     test_syscall();
+
     test_blocking_read();
     test_blocking_write();
     test_two_threads_blocked_on_eventfd();
@@ -115,6 +118,8 @@ fn test_race() {
 }
 
 // This is a test for calling eventfd2 through a syscall.
+// Illumos supports eventfd, but it has no entry to call it through syscall.
+#[cfg(not(target_os = "illumos"))]
 fn test_syscall() {
     let initval = 0 as libc::c_uint;
     let flags = (libc::EFD_CLOEXEC | libc::EFD_NONBLOCK) as libc::c_int;