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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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95 // Index of next deoptimization entry. If negative after calling | 95 // Index of next deoptimization entry. If negative after calling |
96 // FindNextIndex, there are no more, and Next will return an invalid | 96 // FindNextIndex, there are no more, and Next will return an invalid |
97 // SafepointEntry. | 97 // SafepointEntry. |
98 int index_; | 98 int index_; |
99 // Table length. | 99 // Table length. |
100 int limit_; | 100 int limit_; |
101 }; | 101 }; |
102 | 102 |
103 | 103 |
104 void Deoptimizer::DeoptimizeFunction(JSFunction* function) { | 104 void Deoptimizer::DeoptimizeFunction(JSFunction* function) { |
| 105 HandleScope scope; |
105 AssertNoAllocation no_allocation; | 106 AssertNoAllocation no_allocation; |
106 | 107 |
107 if (!function->IsOptimized()) return; | 108 if (!function->IsOptimized()) return; |
108 | 109 |
109 // Get the optimized code. | 110 // Get the optimized code. |
110 Code* code = function->code(); | 111 Code* code = function->code(); |
111 | 112 |
112 // Invalidate the relocation information, as it will become invalid by the | 113 // Invalidate the relocation information, as it will become invalid by the |
113 // code patching below, and is not needed any more. | 114 // code patching below, and is not needed any more. |
114 code->InvalidateRelocation(); | 115 code->InvalidateRelocation(); |
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189 node->set_next(deoptimizing_code_list_); | 190 node->set_next(deoptimizing_code_list_); |
190 deoptimizing_code_list_ = node; | 191 deoptimizing_code_list_ = node; |
191 | 192 |
192 // Set the code for the function to non-optimized version. | 193 // Set the code for the function to non-optimized version. |
193 function->ReplaceCode(function->shared()->code()); | 194 function->ReplaceCode(function->shared()->code()); |
194 | 195 |
195 if (FLAG_trace_deopt) { | 196 if (FLAG_trace_deopt) { |
196 PrintF("[forced deoptimization: "); | 197 PrintF("[forced deoptimization: "); |
197 function->PrintName(); | 198 function->PrintName(); |
198 PrintF(" / %" V8PRIxPTR "]\n", reinterpret_cast<intptr_t>(function)); | 199 PrintF(" / %" V8PRIxPTR "]\n", reinterpret_cast<intptr_t>(function)); |
| 200 #ifdef DEBUG |
| 201 if (FLAG_print_code) { |
| 202 code->PrintLn(); |
| 203 } |
| 204 #endif |
199 } | 205 } |
200 } | 206 } |
201 | 207 |
202 | 208 |
203 void Deoptimizer::PatchStackCheckCodeAt(Address pc_after, | 209 void Deoptimizer::PatchStackCheckCodeAt(Address pc_after, |
204 Code* check_code, | 210 Code* check_code, |
205 Code* replacement_code) { | 211 Code* replacement_code) { |
206 Address call_target_address = pc_after - kIntSize; | 212 Address call_target_address = pc_after - kIntSize; |
207 ASSERT(check_code->entry() == | 213 ASSERT(check_code->entry() == |
208 Assembler::target_address_at(call_target_address)); | 214 Assembler::target_address_at(call_target_address)); |
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769 } | 775 } |
770 __ bind(&done); | 776 __ bind(&done); |
771 } | 777 } |
772 | 778 |
773 #undef __ | 779 #undef __ |
774 | 780 |
775 | 781 |
776 } } // namespace v8::internal | 782 } } // namespace v8::internal |
777 | 783 |
778 #endif // V8_TARGET_ARCH_X64 | 784 #endif // V8_TARGET_ARCH_X64 |
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