further illumos/solaris support.

fixing part of `miri test alloc/hashmap`.

src/tools/miri/ci/ci.sh

@@ -148,8 +148,8 @@ case $HOST_TARGET in
     BASIC="$VERY_BASIC hello hashmap alloc align" # ensures we have the shims for stdout and basic data structures
     TEST_TARGET=x86_64-unknown-freebsd run_tests_minimal $BASIC panic/panic concurrency/simple atomic threadname libc-mem libc-misc libc-random libc-time fs env num_cpus
     TEST_TARGET=i686-unknown-freebsd   run_tests_minimal $BASIC panic/panic concurrency/simple atomic threadname libc-mem libc-misc libc-random libc-time fs env num_cpus
-    TEST_TARGET=x86_64-unknown-illumos run_tests_minimal $VERY_BASIC hello panic/panic concurrency/simple pthread-sync libc-mem libc-misc libc-random
-    TEST_TARGET=x86_64-pc-solaris run_tests_minimal $VERY_BASIC hello panic/panic concurrency/simple pthread-sync libc-mem libc-misc libc-random
+    TEST_TARGET=x86_64-unknown-illumos run_tests_minimal $BASIC hello panic/panic concurrency/simple pthread-sync libc-mem libc-misc libc-random env
+    TEST_TARGET=x86_64-pc-solaris run_tests_minimal $BASIC hello panic/panic concurrency/simple pthread-sync libc-mem libc-misc libc-random env
     TEST_TARGET=aarch64-linux-android  run_tests_minimal $VERY_BASIC hello panic/panic
     TEST_TARGET=wasm32-wasi run_tests_minimal $VERY_BASIC wasm
     TEST_TARGET=wasm32-unknown-unknown run_tests_minimal $VERY_BASIC wasm

src/tools/miri/src/shims/extern_static.rs

@@ -76,6 +76,10 @@ impl<'mir, 'tcx> MiriMachine<'mir, 'tcx> {
                 Self::null_ptr_extern_statics(this, &["bsd_signal"])?;
                 Self::weak_symbol_extern_statics(this, &["signal"])?;
             }
+            "solaris" | "illumos" => {
+                let environ = this.machine.env_vars.unix().environ();
+                Self::add_extern_static(this, "environ", environ);
+            }
             "windows" => {
                 // "_tls_used"
                 // This is some obscure hack that is part of the Windows TLS story. It's a `u8`.

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

@@ -714,8 +714,9 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
                 this.write_int(super::UID, dest)?;
             }
 
-            "getpwuid_r"
+            "getpwuid_r" | "__posix_getpwuid_r"
             if this.frame_in_std() => {
+                // getpwuid_r is the standard name, __posix_getpwuid_r is used on solarish
                 let [uid, pwd, buf, buflen, result] =
                     this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
                 this.check_no_isolation("`getpwuid_r`")?;

src/tools/miri/tests/fail/environ-gets-deallocated.rs

@@ -1,6 +1,11 @@
 //@ignore-target-windows: Windows does not have a global environ list that the program can access directly
 
-#[cfg(any(target_os = "linux", target_os = "freebsd"))]
+#[cfg(any(
+    target_os = "linux",
+    target_os = "freebsd",
+    target_os = "solaris",
+    target_os = "illumos"
+))]
 fn get_environ() -> *const *const u8 {
     extern "C" {
         static mut environ: *const *const u8;