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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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206 int parameter_offset = (param_count - index - 1) * kPointerSize; | 206 int parameter_offset = (param_count - index - 1) * kPointerSize; |
207 return caller_sp() + parameter_offset; | 207 return caller_sp() + parameter_offset; |
208 } | 208 } |
209 | 209 |
210 | 210 |
211 Object* JavaScriptFrame::GetParameter(int index) const { | 211 Object* JavaScriptFrame::GetParameter(int index) const { |
212 return Memory::Object_at(GetParameterSlot(index)); | 212 return Memory::Object_at(GetParameterSlot(index)); |
213 } | 213 } |
214 | 214 |
215 | 215 |
| 216 inline Address JavaScriptFrame::GetOperandSlot(int index) const { |
| 217 Address base = fp() + JavaScriptFrameConstants::kLocal0Offset; |
| 218 ASSERT(IsAddressAligned(base, kPointerSize)); |
| 219 ASSERT(type() == JAVA_SCRIPT); |
| 220 ASSERT(index < ComputeOperandsCount()); |
| 221 // Operand stack grows down. |
| 222 return base - index * kPointerSize; |
| 223 } |
| 224 |
| 225 |
| 226 inline Object* JavaScriptFrame::GetOperand(int index) const { |
| 227 return Memory::Object_at(GetOperandSlot(index)); |
| 228 } |
| 229 |
| 230 |
| 231 inline int JavaScriptFrame::ComputeOperandsCount() const { |
| 232 Address base = fp() + JavaScriptFrameConstants::kLocal0Offset; |
| 233 // Base points to low address of first operand and stack grows down, so add |
| 234 // kPointerSize to get the actual stack size. |
| 235 intptr_t stack_size_in_bytes = (base + kPointerSize) - sp(); |
| 236 ASSERT(IsAligned(stack_size_in_bytes, kPointerSize)); |
| 237 ASSERT(type() == JAVA_SCRIPT); |
| 238 ASSERT(stack_size_in_bytes >= 0); |
| 239 return stack_size_in_bytes >> kPointerSizeLog2; |
| 240 } |
| 241 |
| 242 |
216 inline Object* JavaScriptFrame::receiver() const { | 243 inline Object* JavaScriptFrame::receiver() const { |
217 return GetParameter(-1); | 244 return GetParameter(-1); |
218 } | 245 } |
219 | 246 |
220 | 247 |
221 inline void JavaScriptFrame::set_receiver(Object* value) { | 248 inline void JavaScriptFrame::set_receiver(Object* value) { |
222 Memory::Object_at(GetParameterSlot(-1)) = value; | 249 Memory::Object_at(GetParameterSlot(-1)) = value; |
223 } | 250 } |
224 | 251 |
225 | 252 |
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329 template<typename Iterator> | 356 template<typename Iterator> |
330 void JavaScriptFrameIteratorTemp<Iterator>::Reset() { | 357 void JavaScriptFrameIteratorTemp<Iterator>::Reset() { |
331 iterator_.Reset(); | 358 iterator_.Reset(); |
332 if (!done()) Advance(); | 359 if (!done()) Advance(); |
333 } | 360 } |
334 | 361 |
335 | 362 |
336 } } // namespace v8::internal | 363 } } // namespace v8::internal |
337 | 364 |
338 #endif // V8_FRAMES_INL_H_ | 365 #endif // V8_FRAMES_INL_H_ |
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