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Issue 6698015: Implement strict mode arguments caller/callee. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Kevin's feedback. Created 9 years, 9 months 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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2324 __ movq(Operand(rsp, 2 * kPointerSize), rdx); 2324 __ movq(Operand(rsp, 2 * kPointerSize), rdx);
2325 2325
2326 // Try the new space allocation. Start out with computing the size of 2326 // Try the new space allocation. Start out with computing the size of
2327 // the arguments object and the elements array. 2327 // the arguments object and the elements array.
2328 Label add_arguments_object; 2328 Label add_arguments_object;
2329 __ bind(&try_allocate); 2329 __ bind(&try_allocate);
2330 __ testl(rcx, rcx); 2330 __ testl(rcx, rcx);
2331 __ j(zero, &add_arguments_object); 2331 __ j(zero, &add_arguments_object);
2332 __ leal(rcx, Operand(rcx, times_pointer_size, FixedArray::kHeaderSize)); 2332 __ leal(rcx, Operand(rcx, times_pointer_size, FixedArray::kHeaderSize));
2333 __ bind(&add_arguments_object); 2333 __ bind(&add_arguments_object);
2334 __ addl(rcx, Immediate(Heap::kArgumentsObjectSize)); 2334 __ addl(rcx, Immediate(GetArgumentsObjectSize()));
2335 2335
2336 // Do the allocation of both objects in one go. 2336 // Do the allocation of both objects in one go.
2337 __ AllocateInNewSpace(rcx, rax, rdx, rbx, &runtime, TAG_OBJECT); 2337 __ AllocateInNewSpace(rcx, rax, rdx, rbx, &runtime, TAG_OBJECT);
2338 2338
2339 // Get the arguments boilerplate from the current (global) context. 2339 // Get the arguments boilerplate from the current (global) context.
2340 int offset = Context::SlotOffset(Context::ARGUMENTS_BOILERPLATE_INDEX);
2341 __ movq(rdi, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); 2340 __ movq(rdi, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX)));
2342 __ movq(rdi, FieldOperand(rdi, GlobalObject::kGlobalContextOffset)); 2341 __ movq(rdi, FieldOperand(rdi, GlobalObject::kGlobalContextOffset));
2343 __ movq(rdi, Operand(rdi, offset)); 2342 __ movq(rdi, Operand(rdi,
2343 Context::SlotOffset(GetArgumentsBoilerplateIndex())));
2344 2344
2345 // Copy the JS object part. 2345 // Copy the JS object part.
2346 STATIC_ASSERT(JSObject::kHeaderSize == 3 * kPointerSize); 2346 STATIC_ASSERT(JSObject::kHeaderSize == 3 * kPointerSize);
2347 __ movq(kScratchRegister, FieldOperand(rdi, 0 * kPointerSize)); 2347 __ movq(kScratchRegister, FieldOperand(rdi, 0 * kPointerSize));
2348 __ movq(rdx, FieldOperand(rdi, 1 * kPointerSize)); 2348 __ movq(rdx, FieldOperand(rdi, 1 * kPointerSize));
2349 __ movq(rbx, FieldOperand(rdi, 2 * kPointerSize)); 2349 __ movq(rbx, FieldOperand(rdi, 2 * kPointerSize));
2350 __ movq(FieldOperand(rax, 0 * kPointerSize), kScratchRegister); 2350 __ movq(FieldOperand(rax, 0 * kPointerSize), kScratchRegister);
2351 __ movq(FieldOperand(rax, 1 * kPointerSize), rdx); 2351 __ movq(FieldOperand(rax, 1 * kPointerSize), rdx);
2352 __ movq(FieldOperand(rax, 2 * kPointerSize), rbx); 2352 __ movq(FieldOperand(rax, 2 * kPointerSize), rbx);
2353 2353
2354 // Setup the callee in-object property. 2354 if (type_ == NEW_NON_STRICT) {
2355 ASSERT(Heap::arguments_callee_index == 0); 2355 // Setup the callee in-object property.
2356 __ movq(kScratchRegister, Operand(rsp, 3 * kPointerSize)); 2356 ASSERT(Heap::kArgumentsCalleeIndex == 1);
2357 __ movq(FieldOperand(rax, JSObject::kHeaderSize), kScratchRegister); 2357 __ movq(kScratchRegister, Operand(rsp, 3 * kPointerSize));
2358 __ movq(FieldOperand(rax, JSObject::kHeaderSize +
2359 Heap::kArgumentsCalleeIndex * kPointerSize),
2360 kScratchRegister);
2361 }
2358 2362
2359 // Get the length (smi tagged) and set that as an in-object property too. 2363 // Get the length (smi tagged) and set that as an in-object property too.
2360 ASSERT(Heap::arguments_length_index == 1); 2364 ASSERT(Heap::kArgumentsLengthIndex == 0);
2361 __ movq(rcx, Operand(rsp, 1 * kPointerSize)); 2365 __ movq(rcx, Operand(rsp, 1 * kPointerSize));
2362 __ movq(FieldOperand(rax, JSObject::kHeaderSize + kPointerSize), rcx); 2366 __ movq(FieldOperand(rax, JSObject::kHeaderSize +
2367 Heap::kArgumentsLengthIndex * kPointerSize),
2368 rcx);
2363 2369
2364 // If there are no actual arguments, we're done. 2370 // If there are no actual arguments, we're done.
2365 Label done; 2371 Label done;
2366 __ SmiTest(rcx); 2372 __ SmiTest(rcx);
2367 __ j(zero, &done); 2373 __ j(zero, &done);
2368 2374
2369 // Get the parameters pointer from the stack and untag the length. 2375 // Get the parameters pointer from the stack and untag the length.
2370 __ movq(rdx, Operand(rsp, 2 * kPointerSize)); 2376 __ movq(rdx, Operand(rsp, 2 * kPointerSize));
2371 2377
2372 // Setup the elements pointer in the allocated arguments object and 2378 // Setup the elements pointer in the allocated arguments object and
2373 // initialize the header in the elements fixed array. 2379 // initialize the header in the elements fixed array.
2374 __ lea(rdi, Operand(rax, Heap::kArgumentsObjectSize)); 2380 __ lea(rdi, Operand(rax, GetArgumentsObjectSize()));
2375 __ movq(FieldOperand(rax, JSObject::kElementsOffset), rdi); 2381 __ movq(FieldOperand(rax, JSObject::kElementsOffset), rdi);
2376 __ LoadRoot(kScratchRegister, Heap::kFixedArrayMapRootIndex); 2382 __ LoadRoot(kScratchRegister, Heap::kFixedArrayMapRootIndex);
2377 __ movq(FieldOperand(rdi, FixedArray::kMapOffset), kScratchRegister); 2383 __ movq(FieldOperand(rdi, FixedArray::kMapOffset), kScratchRegister);
2378 __ movq(FieldOperand(rdi, FixedArray::kLengthOffset), rcx); 2384 __ movq(FieldOperand(rdi, FixedArray::kLengthOffset), rcx);
2379 __ SmiToInteger32(rcx, rcx); // Untag length for the loop below. 2385 __ SmiToInteger32(rcx, rcx); // Untag length for the loop below.
2380 2386
2381 // Copy the fixed array slots. 2387 // Copy the fixed array slots.
2382 Label loop; 2388 Label loop;
2383 __ bind(&loop); 2389 __ bind(&loop);
2384 __ movq(kScratchRegister, Operand(rdx, -1 * kPointerSize)); // Skip receiver. 2390 __ movq(kScratchRegister, Operand(rdx, -1 * kPointerSize)); // Skip receiver.
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5024 // Do a tail call to the rewritten stub. 5030 // Do a tail call to the rewritten stub.
5025 __ jmp(rdi); 5031 __ jmp(rdi);
5026 } 5032 }
5027 5033
5028 5034
5029 #undef __ 5035 #undef __
5030 5036
5031 } } // namespace v8::internal 5037 } } // namespace v8::internal
5032 5038
5033 #endif // V8_TARGET_ARCH_X64 5039 #endif // V8_TARGET_ARCH_X64
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