Fix fstat call in darwin-aarch64.

Author: oraluben

substratevm/src/com.oracle.svm.core.posix/src/com/oracle/svm/core/posix/PosixStat.java

@@ -45,7 +45,7 @@ public static boolean isOpen(int fd) {
             result = LinuxStat.fstat64(fd, stat);
         } else if (Platform.includedIn(Platform.DARWIN.class)) {
             DarwinStat.stat stat = StackValue.get(DarwinStat.stat.class);
-            result = DarwinStat.fstat(fd, stat);
+            result = DarwinStat.fstat_aarch64(fd, stat);
         } else {
             throw VMError.shouldNotReachHere("Unsupported platform");
         }

substratevm/src/com.oracle.svm.core.posix/src/com/oracle/svm/core/posix/headers/darwin/DarwinStat.java

@@ -24,6 +24,9 @@
  */
 package com.oracle.svm.core.posix.headers.darwin;
 
+import com.oracle.svm.core.util.VMError;
+import org.graalvm.nativeimage.Platform;
+import org.graalvm.nativeimage.Platforms;
 import org.graalvm.nativeimage.c.CContext;
 import org.graalvm.nativeimage.c.function.CFunction;
 import org.graalvm.nativeimage.c.struct.CField;
@@ -53,10 +56,42 @@ public interface stat extends PointerBase {
     }
 
     @CFunction("fstat$INODE64")
-    public static native int fstat(int fd, stat buf);
+    @Platforms({Platform.DARWIN_AMD64.class})
+    public static native int fstat_amd64(int fd, stat buf);
+
+    @CFunction("fstat")
+    @Platforms({Platform.DARWIN_AARCH64.class})
+    public static native int fstat_aarch64(int fd, stat buf);
+
+    @Platforms(Platform.DARWIN.class)
+    public static int fstat(int fd, stat buf) {
+        if (Platform.includedIn(Platform.AMD64.class)) {
+            return fstat_amd64(fd, buf);
+        } else if (Platform.includedIn(Platform.AARCH64.class)) {
+            return fstat_aarch64(fd, buf);
+        } else {
+            throw VMError.shouldNotReachHere();
+        }
+    }
 
     public static class NoTransitions {
         @CFunction(value = "fstat$INODE64", transition = CFunction.Transition.NO_TRANSITION)
-        public static native int fstat(int fd, stat buf);
+        @Platforms({Platform.DARWIN_AMD64.class})
+        public static native int fstat_amd64(int fd, stat buf);
+
+        @CFunction(value = "fstat", transition = CFunction.Transition.NO_TRANSITION)
+        @Platforms({Platform.DARWIN_AARCH64.class})
+        public static native int fstat_aarch64(int fd, stat buf);
+
+        @Platforms(Platform.DARWIN.class)
+        public static int fstat(int fd, stat buf) {
+            if (Platform.includedIn(Platform.AMD64.class)) {
+                return fstat_amd64(fd, buf);
+            } else if (Platform.includedIn(Platform.AARCH64.class)) {
+                return fstat_aarch64(fd, buf);
+            } else {
+                throw VMError.shouldNotReachHere();
+            }
+        }
     }
 }