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Issue 8404030: Version 3.7.1 (Closed) Base URL: http://v8.googlecode.com/svn/trunk/
Patch Set: Created 9 years, 1 month ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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56 static EntropySource entropy_source; 56 static EntropySource entropy_source;
57 57
58 58
59 bool V8::Initialize(Deserializer* des) { 59 bool V8::Initialize(Deserializer* des) {
60 // Setting --harmony implies all other harmony flags. 60 // Setting --harmony implies all other harmony flags.
61 // TODO(rossberg): Is there a better place to put this? 61 // TODO(rossberg): Is there a better place to put this?
62 if (FLAG_harmony) { 62 if (FLAG_harmony) {
63 FLAG_harmony_typeof = true; 63 FLAG_harmony_typeof = true;
64 FLAG_harmony_scoping = true; 64 FLAG_harmony_scoping = true;
65 FLAG_harmony_proxies = true; 65 FLAG_harmony_proxies = true;
66 FLAG_harmony_weakmaps = true; 66 FLAG_harmony_collections = true;
67 } 67 }
68 68
69 InitializeOncePerProcess(); 69 InitializeOncePerProcess();
70 70
71 // The current thread may not yet had entered an isolate to run. 71 // The current thread may not yet had entered an isolate to run.
72 // Note the Isolate::Current() may be non-null because for various 72 // Note the Isolate::Current() may be non-null because for various
73 // initialization purposes an initializing thread may be assigned an isolate 73 // initialization purposes an initializing thread may be assigned an isolate
74 // but not actually enter it. 74 // but not actually enter it.
75 if (i::Isolate::CurrentPerIsolateThreadData() == NULL) { 75 if (i::Isolate::CurrentPerIsolateThreadData() == NULL) {
76 i::Isolate::EnterDefaultIsolate(); 76 i::Isolate::EnterDefaultIsolate();
(...skipping 66 matching lines...) Expand 10 before | Expand all | Expand 10 after
143 return (state[0] << 14) + (state[1] & 0x3FFFF); 143 return (state[0] << 14) + (state[1] & 0x3FFFF);
144 } 144 }
145 145
146 146
147 void V8::SetEntropySource(EntropySource source) { 147 void V8::SetEntropySource(EntropySource source) {
148 entropy_source = source; 148 entropy_source = source;
149 } 149 }
150 150
151 151
152 // Used by JavaScript APIs 152 // Used by JavaScript APIs
153 uint32_t V8::Random(Isolate* isolate) { 153 uint32_t V8::Random(Context* context) {
154 ASSERT(isolate == Isolate::Current()); 154 ASSERT(context->IsGlobalContext());
155 return random_base(isolate->random_seed()); 155 ByteArray* seed = context->random_seed();
156 return random_base(reinterpret_cast<uint32_t*>(seed->GetDataStartAddress()));
156 } 157 }
157 158
158 159
159 // Used internally by the JIT and memory allocator for security 160 // Used internally by the JIT and memory allocator for security
160 // purposes. So, we keep a different state to prevent informations 161 // purposes. So, we keep a different state to prevent informations
161 // leaks that could be used in an exploit. 162 // leaks that could be used in an exploit.
162 uint32_t V8::RandomPrivate(Isolate* isolate) { 163 uint32_t V8::RandomPrivate(Isolate* isolate) {
163 ASSERT(isolate == Isolate::Current()); 164 ASSERT(isolate == Isolate::Current());
164 return random_base(isolate->private_random_seed()); 165 return random_base(isolate->private_random_seed());
165 } 166 }
166 167
167 168
168 bool V8::IdleNotification() { 169 bool V8::IdleNotification() {
169 // Returning true tells the caller that there is no need to call 170 // Returning true tells the caller that there is no need to call
170 // IdleNotification again. 171 // IdleNotification again.
171 if (!FLAG_use_idle_notification) return true; 172 if (!FLAG_use_idle_notification) return true;
172 173
173 // Tell the heap that it may want to adjust. 174 // Tell the heap that it may want to adjust.
174 return HEAP->IdleNotification(); 175 return HEAP->IdleNotification();
175 } 176 }
176 177
177 178
178 // Use a union type to avoid type-aliasing optimizations in GCC. 179 // Use a union type to avoid type-aliasing optimizations in GCC.
179 typedef union { 180 typedef union {
180 double double_value; 181 double double_value;
181 uint64_t uint64_t_value; 182 uint64_t uint64_t_value;
182 } double_int_union; 183 } double_int_union;
183 184
184 185
185 Object* V8::FillHeapNumberWithRandom(Object* heap_number, Isolate* isolate) { 186 Object* V8::FillHeapNumberWithRandom(Object* heap_number,
186 uint64_t random_bits = Random(isolate); 187 Context* context) {
188 uint64_t random_bits = Random(context);
187 // Make a double* from address (heap_number + sizeof(double)). 189 // Make a double* from address (heap_number + sizeof(double)).
188 double_int_union* r = reinterpret_cast<double_int_union*>( 190 double_int_union* r = reinterpret_cast<double_int_union*>(
189 reinterpret_cast<char*>(heap_number) + 191 reinterpret_cast<char*>(heap_number) +
190 HeapNumber::kValueOffset - kHeapObjectTag); 192 HeapNumber::kValueOffset - kHeapObjectTag);
191 // Convert 32 random bits to 0.(32 random bits) in a double 193 // Convert 32 random bits to 0.(32 random bits) in a double
192 // by computing: 194 // by computing:
193 // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)). 195 // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)).
194 const double binary_million = 1048576.0; 196 const double binary_million = 1048576.0;
195 r->double_value = binary_million; 197 r->double_value = binary_million;
196 r->uint64_t_value |= random_bits; 198 r->uint64_t_value |= random_bits;
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227 ElementsAccessor::InitializeOncePerProcess(); 229 ElementsAccessor::InitializeOncePerProcess();
228 230
229 if (FLAG_stress_compaction) { 231 if (FLAG_stress_compaction) {
230 FLAG_force_marking_deque_overflows = true; 232 FLAG_force_marking_deque_overflows = true;
231 FLAG_gc_global = true; 233 FLAG_gc_global = true;
232 FLAG_max_new_space_size = (1 << (kPageSizeBits - 10)) * 2; 234 FLAG_max_new_space_size = (1 << (kPageSizeBits - 10)) * 2;
233 } 235 }
234 } 236 }
235 237
236 } } // namespace v8::internal 238 } } // namespace v8::internal
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