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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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4869 // nop | 4869 // nop |
4870 // nop | 4870 // nop |
4871 // call <on-stack replacment> | 4871 // call <on-stack replacment> |
4872 // ok: | 4872 // ok: |
4873 *jns_instr_address = kNopByteOne; | 4873 *jns_instr_address = kNopByteOne; |
4874 *jns_offset_address = kNopByteTwo; | 4874 *jns_offset_address = kNopByteTwo; |
4875 break; | 4875 break; |
4876 } | 4876 } |
4877 | 4877 |
4878 Assembler::set_target_address_at(call_target_address, | 4878 Assembler::set_target_address_at(call_target_address, |
| 4879 unoptimized_code, |
4879 replacement_code->entry()); | 4880 replacement_code->entry()); |
4880 unoptimized_code->GetHeap()->incremental_marking()->RecordCodeTargetPatch( | 4881 unoptimized_code->GetHeap()->incremental_marking()->RecordCodeTargetPatch( |
4881 unoptimized_code, call_target_address, replacement_code); | 4882 unoptimized_code, call_target_address, replacement_code); |
4882 } | 4883 } |
4883 | 4884 |
4884 | 4885 |
4885 BackEdgeTable::BackEdgeState BackEdgeTable::GetBackEdgeState( | 4886 BackEdgeTable::BackEdgeState BackEdgeTable::GetBackEdgeState( |
4886 Isolate* isolate, | 4887 Isolate* isolate, |
4887 Code* unoptimized_code, | 4888 Code* unoptimized_code, |
4888 Address pc) { | 4889 Address pc) { |
4889 Address call_target_address = pc - kIntSize; | 4890 Address call_target_address = pc - kIntSize; |
4890 Address jns_instr_address = call_target_address - 3; | 4891 Address jns_instr_address = call_target_address - 3; |
4891 ASSERT_EQ(kCallInstruction, *(call_target_address - 1)); | 4892 ASSERT_EQ(kCallInstruction, *(call_target_address - 1)); |
4892 | 4893 |
4893 if (*jns_instr_address == kJnsInstruction) { | 4894 if (*jns_instr_address == kJnsInstruction) { |
4894 ASSERT_EQ(kJnsOffset, *(call_target_address - 2)); | 4895 ASSERT_EQ(kJnsOffset, *(call_target_address - 2)); |
4895 ASSERT_EQ(isolate->builtins()->InterruptCheck()->entry(), | 4896 ASSERT_EQ(isolate->builtins()->InterruptCheck()->entry(), |
4896 Assembler::target_address_at(call_target_address)); | 4897 Assembler::target_address_at(call_target_address, |
| 4898 unoptimized_code)); |
4897 return INTERRUPT; | 4899 return INTERRUPT; |
4898 } | 4900 } |
4899 | 4901 |
4900 ASSERT_EQ(kNopByteOne, *jns_instr_address); | 4902 ASSERT_EQ(kNopByteOne, *jns_instr_address); |
4901 ASSERT_EQ(kNopByteTwo, *(call_target_address - 2)); | 4903 ASSERT_EQ(kNopByteTwo, *(call_target_address - 2)); |
4902 | 4904 |
4903 if (Assembler::target_address_at(call_target_address) == | 4905 if (Assembler::target_address_at(call_target_address, |
| 4906 unoptimized_code) == |
4904 isolate->builtins()->OnStackReplacement()->entry()) { | 4907 isolate->builtins()->OnStackReplacement()->entry()) { |
4905 return ON_STACK_REPLACEMENT; | 4908 return ON_STACK_REPLACEMENT; |
4906 } | 4909 } |
4907 | 4910 |
4908 ASSERT_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), | 4911 ASSERT_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), |
4909 Assembler::target_address_at(call_target_address)); | 4912 Assembler::target_address_at(call_target_address, |
| 4913 unoptimized_code)); |
4910 return OSR_AFTER_STACK_CHECK; | 4914 return OSR_AFTER_STACK_CHECK; |
4911 } | 4915 } |
4912 | 4916 |
4913 | 4917 |
4914 } } // namespace v8::internal | 4918 } } // namespace v8::internal |
4915 | 4919 |
4916 #endif // V8_TARGET_ARCH_X64 | 4920 #endif // V8_TARGET_ARCH_X64 |
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