JDK-8261397: bsd_aarch64 part

Author: AntonKozlov

src/hotspot/cpu/aarch64/vm_version_aarch64.hpp

@@ -136,6 +136,11 @@ class VM_Version : public Abstract_VM_Version {
   constexpr static bool supports_stack_watermark_barrier() { return true; }
 
   static void get_compatible_board(char *buf, int buflen);
+
+#ifdef __APPLE__
+  // Is the CPU running emulated (for example macOS Rosetta running x86_64 code on M1 ARM (aarch64)
+  static bool is_cpu_emulated();
+#endif
 };
 
 #endif // CPU_AARCH64_VM_VERSION_AARCH64_HPP

src/hotspot/os_cpu/bsd_aarch64/vm_version_bsd_aarch64.cpp

@@ -97,3 +97,11 @@ void VM_Version::get_compatible_board(char *buf, int buflen) {
   assert(buflen >= 1, "invalid argument");
   *buf = '\0';
 }
+
+#ifdef __APPLE__
+
+bool VM_Version::is_cpu_emulated() {
+  return false;
+}
+
+#endif