Invalidate CPU I-cache on Apple Silicon

Call sys_icache_invalidate() after pthread_jit_write_protect_np() according to https://developer.apple.com/documentation/apple-silicon/porting-just-in-time-compilers-to-apple-silicon

src/virtual_memory.c

@@ -39,6 +39,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #  include <pthread.h>
 #  include <sys/utsname.h>
 #  include <stdio.h>
+#  if defined(MAC_OS_VERSION_11_0) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_11_0
+#   include <libkern/OSCacheControl.h>
+#  endif
 # endif
 #endif
 #include <sys/types.h>
@@ -189,6 +192,7 @@ void setPagesRX(void* ptr, size_t bytes) {
 	&& MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_11_0
 	if (__builtin_available(macOS 11.0, *)) {
 		pthread_jit_write_protect_np(1);
+		sys_icache_invalidate(ptr, bytes);
 	} else {
 		pageProtect(ptr, bytes, PAGE_EXECUTE_READ, &errfunc);
 	}