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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_X64. | 5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_X64. |
6 #if defined(TARGET_ARCH_X64) | 6 #if defined(TARGET_ARCH_X64) |
7 | 7 |
8 #include "vm/intermediate_language.h" | 8 #include "vm/intermediate_language.h" |
9 | 9 |
10 #include "vm/compiler.h" | 10 #include "vm/compiler.h" |
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2584 compiler->parallel_move_resolver()->EmitNativeCode(parallel_move()); | 2584 compiler->parallel_move_resolver()->EmitNativeCode(parallel_move()); |
2585 } | 2585 } |
2586 | 2586 |
2587 // Restore RSP from RBP as we are coming from a throw and the code for | 2587 // Restore RSP from RBP as we are coming from a throw and the code for |
2588 // popping arguments has not been run. | 2588 // popping arguments has not been run. |
2589 const intptr_t fp_sp_dist = | 2589 const intptr_t fp_sp_dist = |
2590 (kFirstLocalSlotFromFp + 1 - compiler->StackSize()) * kWordSize; | 2590 (kFirstLocalSlotFromFp + 1 - compiler->StackSize()) * kWordSize; |
2591 ASSERT(fp_sp_dist <= 0); | 2591 ASSERT(fp_sp_dist <= 0); |
2592 __ leaq(RSP, Address(RBP, fp_sp_dist)); | 2592 __ leaq(RSP, Address(RBP, fp_sp_dist)); |
2593 | 2593 |
2594 // Restore stack and initialize the two exception variables: | 2594 // Auxiliary variables introduced by the try catch can be captured if we are |
2595 // exception and stack trace variables. | 2595 // inside a function with yield/resume points. In this case we first need |
2596 __ movq(Address(RBP, exception_var().index() * kWordSize), | 2596 // to restore the context to match the context at entry into the closure. |
2597 kExceptionObjectReg); | 2597 if (should_restore_closure_context()) { |
2598 __ movq(Address(RBP, stacktrace_var().index() * kWordSize), | 2598 const ParsedFunction& parsed_function = compiler->parsed_function(); |
2599 kStackTraceObjectReg); | 2599 ASSERT(parsed_function.function().IsClosureFunction()); |
| 2600 LocalScope* scope = parsed_function.node_sequence()->scope(); |
| 2601 |
| 2602 LocalVariable* closure_parameter = scope->VariableAt(0); |
| 2603 ASSERT(!closure_parameter->is_captured()); |
| 2604 __ movq(CTX, Address(RBP, closure_parameter->index() * kWordSize)); |
| 2605 __ movq(CTX, FieldAddress(CTX, Closure::context_offset())); |
| 2606 |
| 2607 #ifdef DEBUG |
| 2608 Label ok; |
| 2609 __ LoadClassId(RBX, CTX); |
| 2610 __ cmpq(RBX, Immediate(kContextCid)); |
| 2611 __ j(EQUAL, &ok, Assembler::kNearJump); |
| 2612 __ Stop("Incorrect context at entry"); |
| 2613 __ Bind(&ok); |
| 2614 #endif |
| 2615 |
| 2616 const intptr_t context_index = |
| 2617 parsed_function.current_context_var()->index(); |
| 2618 __ movq(Address(RBP, context_index * kWordSize), CTX); |
| 2619 } |
| 2620 |
| 2621 // Initialize exception and stack trace variables. |
| 2622 if (exception_var().is_captured()) { |
| 2623 ASSERT(stacktrace_var().is_captured()); |
| 2624 __ StoreIntoObject( |
| 2625 CTX, |
| 2626 FieldAddress(CTX, Context::variable_offset(exception_var().index())), |
| 2627 kExceptionObjectReg); |
| 2628 __ StoreIntoObject( |
| 2629 CTX, |
| 2630 FieldAddress(CTX, Context::variable_offset(stacktrace_var().index())), |
| 2631 kStackTraceObjectReg); |
| 2632 } else { |
| 2633 __ movq(Address(RBP, exception_var().index() * kWordSize), |
| 2634 kExceptionObjectReg); |
| 2635 __ movq(Address(RBP, stacktrace_var().index() * kWordSize), |
| 2636 kStackTraceObjectReg); |
| 2637 } |
2600 } | 2638 } |
2601 | 2639 |
2602 | 2640 |
2603 LocationSummary* CheckStackOverflowInstr::MakeLocationSummary(Zone* zone, | 2641 LocationSummary* CheckStackOverflowInstr::MakeLocationSummary(Zone* zone, |
2604 bool opt) const { | 2642 bool opt) const { |
2605 const intptr_t kNumInputs = 0; | 2643 const intptr_t kNumInputs = 0; |
2606 const intptr_t kNumTemps = 1; | 2644 const intptr_t kNumTemps = 1; |
2607 LocationSummary* summary = new(zone) LocationSummary( | 2645 LocationSummary* summary = new(zone) LocationSummary( |
2608 zone, kNumInputs, | 2646 zone, kNumInputs, |
2609 kNumTemps, | 2647 kNumTemps, |
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6599 __ Drop(1); | 6637 __ Drop(1); |
6600 __ popq(result); | 6638 __ popq(result); |
6601 } | 6639 } |
6602 | 6640 |
6603 | 6641 |
6604 } // namespace dart | 6642 } // namespace dart |
6605 | 6643 |
6606 #undef __ | 6644 #undef __ |
6607 | 6645 |
6608 #endif // defined TARGET_ARCH_X64 | 6646 #endif // defined TARGET_ARCH_X64 |
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