Moved random generator state to global context.

src/v8.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 123 matching lines @@
   return (state[0] << 14) + (state[1] & 0x3FFFF);
 }
 
 
 void V8::SetEntropySource(EntropySource source) {
   entropy_source = source;
 }
 
 
 // Used by JavaScript APIs
-uint32_t V8::Random(Isolate* isolate) {
-  ASSERT(isolate == Isolate::Current());
-  return random_base(isolate->random_seed());
+uint32_t V8::Random(Context* context) {
+  ASSERT(context->IsGlobalContext());
+  ByteArray* seed = context->random_seed();
+  return random_base(reinterpret_cast<uint32_t*>(seed->GetDataStartAddress()));
 }
 
 
 // Used internally by the JIT and memory allocator for security
 // purposes. So, we keep a different state to prevent informations
 // leaks that could be used in an exploit.
 uint32_t V8::RandomPrivate(Isolate* isolate) {
   ASSERT(isolate == Isolate::Current());
   return random_base(isolate->private_random_seed());
 }
 
 
 bool V8::IdleNotification() {
   // Returning true tells the caller that there is no need to call
   // IdleNotification again.
   if (!FLAG_use_idle_notification) return true;
 
   // Tell the heap that it may want to adjust.
   return HEAP->IdleNotification();
 }
 
 
 // Use a union type to avoid type-aliasing optimizations in GCC.
 typedef union {
   double double_value;
   uint64_t uint64_t_value;
 } double_int_union;
 
 
-Object* V8::FillHeapNumberWithRandom(Object* heap_number, Isolate* isolate) {
-  uint64_t random_bits = Random(isolate);
+Object* V8::FillHeapNumberWithRandom(Object* heap_number,
+                                     Context* context) {
+  uint64_t random_bits = Random(context);
   // Make a double* from address (heap_number + sizeof(double)).
   double_int_union* r = reinterpret_cast<double_int_union*>(
       reinterpret_cast<char*>(heap_number) +
       HeapNumber::kValueOffset - kHeapObjectTag);
   // Convert 32 random bits to 0.(32 random bits) in a double
   // by computing:
   // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)).
   const double binary_million = 1048576.0;
   r->double_value = binary_million;
   r->uint64_t_value |=  random_bits;
@@ skipping 24 matching lines @@
 
   RuntimeProfiler::GlobalSetup();
 
   // Peephole optimization might interfere with deoptimization.
   FLAG_peephole_optimization = !use_crankshaft_;
 
   ElementsAccessor::InitializeOncePerProcess();
 }
 
 } }  // namespace v8::internal