--predictable mode added

src/v8.cc

 // Copyright 2012 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 144 matching lines @@
     for (int i = 0; i < call_completed_callbacks_->length(); i++) {
       call_completed_callbacks_->at(i)();
     }
   }
   handle_scope_implementer->DecrementCallDepth();
 }
 
 
 void V8::InitializeOncePerProcessImpl() {
   FlagList::EnforceFlagImplications();
+
+  if (FLAG_predictable) {
+    if (FLAG_random_seed == 0) {
+      // Avoid random seeds in predictable mode.
+      FLAG_random_seed = 12347;
+    }
+    FLAG_hash_seed = 0;
+  }
+
   if (FLAG_stress_compaction) {
     FLAG_force_marking_deque_overflows = true;
     FLAG_gc_global = true;
     FLAG_max_new_space_size = (1 << (kPageSizeBits - 10)) * 2;
   }
 
 #ifdef V8_USE_DEFAULT_PLATFORM
   platform_ = new DefaultPlatform;
 #endif
   Sampler::SetUp();
@@ skipping 24 matching lines @@
   platform_ = NULL;
 }
 
 
 v8::Platform* V8::GetCurrentPlatform() {
   ASSERT(platform_);
   return platform_;
 }
 
 } }  // namespace v8::internal