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Issue 2908009: Create a separate class to encapsulate ScopeInfo serialization.... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 10 years, 5 months ago
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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. 1 // Copyright 2006-2008 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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542 if (!found_it) return Heap::undefined_value(); 542 if (!found_it) return Heap::undefined_value();
543 Handle<JSFunction> function(holder); 543 Handle<JSFunction> function(holder);
544 544
545 // Find the top invocation of the function by traversing frames. 545 // Find the top invocation of the function by traversing frames.
546 for (JavaScriptFrameIterator it; !it.done(); it.Advance()) { 546 for (JavaScriptFrameIterator it; !it.done(); it.Advance()) {
547 // Skip all frames that aren't invocations of the given function. 547 // Skip all frames that aren't invocations of the given function.
548 JavaScriptFrame* frame = it.frame(); 548 JavaScriptFrame* frame = it.frame();
549 if (frame->function() != *function) continue; 549 if (frame->function() != *function) continue;
550 550
551 // If there is an arguments variable in the stack, we return that. 551 // If there is an arguments variable in the stack, we return that.
552 int index = ScopeInfo<>::StackSlotIndex(function->shared()->scope_info(), 552 int index = function->shared()->scope_info()->
553 Heap::arguments_symbol()); 553 StackSlotIndex(Heap::arguments_symbol());
554 if (index >= 0) { 554 if (index >= 0) {
555 Handle<Object> arguments = Handle<Object>(frame->GetExpression(index)); 555 Handle<Object> arguments = Handle<Object>(frame->GetExpression(index));
556 if (!arguments->IsTheHole()) return *arguments; 556 if (!arguments->IsTheHole()) return *arguments;
557 } 557 }
558 558
559 // If there isn't an arguments variable in the stack, we need to 559 // If there isn't an arguments variable in the stack, we need to
560 // find the frame that holds the actual arguments passed to the 560 // find the frame that holds the actual arguments passed to the
561 // function on the stack. 561 // function on the stack.
562 it.AdvanceToArgumentsFrame(); 562 it.AdvanceToArgumentsFrame();
563 frame = it.frame(); 563 frame = it.frame();
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652 } 652 }
653 653
654 654
655 const AccessorDescriptor Accessors::ObjectPrototype = { 655 const AccessorDescriptor Accessors::ObjectPrototype = {
656 ObjectGetPrototype, 656 ObjectGetPrototype,
657 ObjectSetPrototype, 657 ObjectSetPrototype,
658 0 658 0
659 }; 659 };
660 660
661 } } // namespace v8::internal 661 } } // namespace v8::internal
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