New command-line option for the RNG seed

The pRNG seed can be set from the command-line using the --vr-seed
command-line switch:

  valgrind --tool=verrou --rounding-mode=random --vr-seed=12345

vr_clo.c

@@ -31,6 +31,7 @@
 */
 
 #include "vr_main.h"
+#include "vr_rand.h"
 
 void vr_env_clo (const HChar* env, const HChar *clo) {
   HChar* val = VG_(getenv)(env);
@@ -59,6 +60,8 @@ void vr_clo_defaults (void) {
   for(opIt=0 ; opIt<VR_OP ; opIt++){
     vr.instr_op[opIt]=False;
   }
+
+  vr_rand_autoSeed (&vr_rand);
 }
 
 Bool vr_process_clo (const HChar *arg) {
@@ -136,6 +139,11 @@ Bool vr_process_clo (const HChar *arg) {
     vr.includeSource = vr_loadIncludeSourceList(vr.includeSource, str);
   }
 
+  // Set the pseudo-Random Number Generator
+  else if (VG_STR_CLO (arg, "--vr-seed", str)) {
+    vr_rand_setSeed (&vr_rand, VG_(strtoull10)(str, NULL));
+  }
+
   // Unknown option
   else{
     return False;

vr_fpOps.cxx

@@ -30,26 +30,15 @@
    The GNU General Public License is contained in the file COPYING.
 */
 
-#include <cstdlib>
-#include <ctime>
-//#include <iostream>
-//#include <cmath>
-#include "math.h"
+#include "pub_tool_libcfile.h"
+#include "vr_fpRepr.hxx"
 #include "vr_fpOps.h"
 #include "vr_fma.h"
 
-//#include "pub_tool_vki.h"
-
 extern "C" {
-#include <stdio.h>
-#include "pub_tool_libcprint.h"
 #include "vr_rand.h"
 }
 
-#include "pub_tool_basics.h"
-#include "pub_tool_libcfile.h"
-
-#include "vr_fpRepr.hxx"
 
 // Forward declarations
 template <typename REAL>
@@ -143,7 +132,7 @@ void vr_fpOpsInit (vr_RoundingMode mode) {
 
   if (ROUNDINGMODE == VR_RANDOM
       or ROUNDINGMODE == VR_AVERAGE) {
-    vr_rand_autoSeed (&vr_rand);
+    VG_(umsg)("First seed : %u\n", vr_rand_getSeed (&vr_rand));
   }
 
 

vr_rand.c

@@ -58,7 +58,6 @@ void vr_rand_autoSeed (Vr_Rand * r) {
   unsigned int pid = VG_(getpid)();
   unsigned int seed = now.tv_usec + pid;
   vr_rand_setSeed (r, seed);
-  VG_(umsg)("First seed : %u\n", vr_rand_getSeed(r));
 }
 
 unsigned int vr_rand_getSeed (Vr_Rand * r) {