Mac nano patch

mac_nano.patch

diff --git a/src/os/bsd/vm/os_bsd.cpp b/src/os/bsd/vm/os_bsd.cpp
--- a/src/os/bsd/vm/os_bsd.cpp
+++ b/src/os/bsd/vm/os_bsd.cpp
@@ -107,6 +107,7 @@
 
 #ifdef __APPLE__
 # include <mach/mach.h> // semaphore_* API
+# include <mach/mach_time.h>
 # include <mach-o/dyld.h>
 # include <sys/proc_info.h>
 # include <objc/objc-auto.h>
@@ -956,8 +957,19 @@
 #endif
 
 #ifdef __APPLE__
+int clock_get_time(int clk_id, struct timespec *tp) {
+  uint64_t tm;
+  static mach_timebase_info_data_t timebase_info= {0,0};
+  if (timebase_info.denom == 0)
+    (void) mach_timebase_info(&timebase_info);
+  tm = mach_absolute_time();
+  tp->tv_sec = 0;
+  tp->tv_nsec = (tm * timebase_info.numer) / timebase_info.denom;
+  return 0;
+}
+
 void os::Bsd::clock_init() {
-        // XXXDARWIN: Investigate replacement monotonic clock
+    _clock_gettime = ::clock_get_time;
 }
 #else
 void os::Bsd::clock_init() {
[2.0.0-ruby] denofevil@Deniss-M