From e8d742b5ab816182d520771c6c5330c3f4ca6b66 Mon Sep 17 00:00:00 2001
From: David Carlier <devnexen@gmail.com>
Date: Sat, 4 May 2024 20:46:30 +0100
Subject: [PATCH] further fixes attempts

---
 src/shims/unix/solarish/foreign_items.rs |  1 +
 src/shims/unix/sync.rs                   | 17 ++++++++++++-----
 tests/pass-dep/shims/libc-misc.rs        |  2 --
 3 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/src/shims/unix/solarish/foreign_items.rs b/src/shims/unix/solarish/foreign_items.rs
index f3b3f35df7..ea67e072ef 100644
--- a/src/shims/unix/solarish/foreign_items.rs
+++ b/src/shims/unix/solarish/foreign_items.rs
@@ -26,6 +26,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
                 let errno_place = this.last_error_place()?;
                 this.write_scalar(errno_place.to_ref(this).to_scalar(), dest)?;
             }
+
             // Threading
             "pthread_condattr_setclock" => {
                 let [attr, clock_id] =
diff --git a/src/shims/unix/sync.rs b/src/shims/unix/sync.rs
index 9acac60209..e7a2d4e01a 100644
--- a/src/shims/unix/sync.rs
+++ b/src/shims/unix/sync.rs
@@ -133,13 +133,16 @@ fn mutex_set_kind<'mir, 'tcx: 'mir>(
 // (need to avoid this because it is set by static initializer macros)
 // bytes 4-7: rwlock id as u32 or 0 if id is not assigned yet.
 
-const RWLOCK_ID_OFFSET: u64 = 4;
+#[inline]
+fn rwlock_id_offset<'mir, 'tcx: 'mir>(ecx: &MiriInterpCx<'mir, 'tcx>) -> u64 {
+    if matches!(&*ecx.tcx.sess.target.os, "macos") { 4 } else { 0 }
+}
 
 fn rwlock_get_id<'mir, 'tcx: 'mir>(
     ecx: &mut MiriInterpCx<'mir, 'tcx>,
     rwlock_op: &OpTy<'tcx, Provenance>,
 ) -> InterpResult<'tcx, RwLockId> {
-    ecx.rwlock_get_or_create_id(rwlock_op, ecx.libc_ty_layout("pthread_rwlock_t"), RWLOCK_ID_OFFSET)
+    ecx.rwlock_get_or_create_id(rwlock_op, ecx.libc_ty_layout("pthread_rwlock_t"), rwlock_id_offset(ecx))
 }
 
 // pthread_condattr_t
@@ -186,14 +189,18 @@ fn condattr_set_clock_id<'mir, 'tcx: 'mir>(
 // bytes 4-7: the conditional variable id as u32 or 0 if id is not assigned yet.
 // bytes 8-11: the clock id constant as i32
 
-const CONDVAR_ID_OFFSET: u64 = 4;
 const CONDVAR_CLOCK_OFFSET: u64 = 8;
 
+#[inline]
+fn cond_id_offset<'mir, 'tcx: 'mir>(ecx: &MiriInterpCx<'mir, 'tcx>) -> u64 {
+    if matches!(&*ecx.tcx.sess.target.os, "macos") { 4 } else { 0 }
+}
+
 fn cond_get_id<'mir, 'tcx: 'mir>(
     ecx: &mut MiriInterpCx<'mir, 'tcx>,
     cond_op: &OpTy<'tcx, Provenance>,
 ) -> InterpResult<'tcx, CondvarId> {
-    ecx.condvar_get_or_create_id(cond_op, ecx.libc_ty_layout("pthread_cond_t"), CONDVAR_ID_OFFSET)
+    ecx.condvar_get_or_create_id(cond_op, ecx.libc_ty_layout("pthread_cond_t"), cond_id_offset(ecx))
 }
 
 fn cond_reset_id<'mir, 'tcx: 'mir>(
@@ -202,7 +209,7 @@ fn cond_reset_id<'mir, 'tcx: 'mir>(
 ) -> InterpResult<'tcx, ()> {
     ecx.deref_pointer_and_write(
         cond_op,
-        CONDVAR_ID_OFFSET,
+        cond_id_offset(ecx),
         Scalar::from_i32(0),
         ecx.libc_ty_layout("pthread_cond_t"),
         ecx.machine.layouts.u32,
diff --git a/tests/pass-dep/shims/libc-misc.rs b/tests/pass-dep/shims/libc-misc.rs
index c320480928..f710daf527 100644
--- a/tests/pass-dep/shims/libc-misc.rs
+++ b/tests/pass-dep/shims/libc-misc.rs
@@ -153,8 +153,6 @@ fn test_sync_file_range() {
 
 /// Tests whether each thread has its own `__errno_location`.
 fn test_thread_local_errno() {
-    #[cfg(any(target_os = "solaris", target_os = "illumos"))]
-    use libc::__errno as __errno_location;
     #[cfg(target_os = "linux")]
     use libc::__errno_location;
     #[cfg(any(target_os = "macos", target_os = "freebsd"))]