X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?p=pintos-anon;a=blobdiff_plain;f=src%2Fthreads%2Finit.c;h=b89b282435ffa4fd284c776049dcc4c45a60c66c;hp=5893ce970b21fe12f707e4c3be55767e31c0034f;hb=0fd3a243b790dd1cfc9e0a40c57dddde56cf344d;hpb=ed04361f6ec91e4f0db1550c2cc487a461b2d17b

diff --git a/src/threads/init.c b/src/threads/init.c
index 5893ce9..b89b282 100644
--- a/src/threads/init.c
+++ b/src/threads/init.c
@@ -13,6 +13,7 @@
 #include "devices/serial.h"
 #include "devices/timer.h"
 #include "devices/vga.h"
+#include "devices/rtc.h"
 #include "threads/interrupt.h"
 #include "threads/io.h"
 #include "threads/loader.h"
@@ -251,6 +252,16 @@ parse_options (char **argv)
       else
         PANIC ("unknown option `%s' (use -h for help)", name);
     }
+
+  /* Initialize the random number generator based on the system
+     time.  This has no effect if an "-rs" option was specified.
+
+     When running under Bochs, this is not enough by itself to
+     get a good seed value, because the pintos script sets the
+     initial time to a predictable value, not to the local time,
+     for reproducibility.  To fix this, give the "-r" option to
+     the pintos script to request real-time execution. */
+  random_init (rtc_get_time ());
   
   return argv;
 }