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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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4874 // nop | 4874 // nop |
4875 // nop | 4875 // nop |
4876 // call <on-stack replacment> | 4876 // call <on-stack replacment> |
4877 // ok: | 4877 // ok: |
4878 *jns_instr_address = kNopByteOne; | 4878 *jns_instr_address = kNopByteOne; |
4879 *jns_offset_address = kNopByteTwo; | 4879 *jns_offset_address = kNopByteTwo; |
4880 break; | 4880 break; |
4881 } | 4881 } |
4882 | 4882 |
4883 Assembler::set_target_address_at(call_target_address, | 4883 Assembler::set_target_address_at(call_target_address, |
| 4884 unoptimized_code, |
4884 replacement_code->entry()); | 4885 replacement_code->entry()); |
4885 unoptimized_code->GetHeap()->incremental_marking()->RecordCodeTargetPatch( | 4886 unoptimized_code->GetHeap()->incremental_marking()->RecordCodeTargetPatch( |
4886 unoptimized_code, call_target_address, replacement_code); | 4887 unoptimized_code, call_target_address, replacement_code); |
4887 } | 4888 } |
4888 | 4889 |
4889 | 4890 |
4890 BackEdgeTable::BackEdgeState BackEdgeTable::GetBackEdgeState( | 4891 BackEdgeTable::BackEdgeState BackEdgeTable::GetBackEdgeState( |
4891 Isolate* isolate, | 4892 Isolate* isolate, |
4892 Code* unoptimized_code, | 4893 Code* unoptimized_code, |
4893 Address pc) { | 4894 Address pc) { |
4894 Address call_target_address = pc - kIntSize; | 4895 Address call_target_address = pc - kIntSize; |
4895 Address jns_instr_address = call_target_address - 3; | 4896 Address jns_instr_address = call_target_address - 3; |
4896 ASSERT_EQ(kCallInstruction, *(call_target_address - 1)); | 4897 ASSERT_EQ(kCallInstruction, *(call_target_address - 1)); |
4897 | 4898 |
4898 if (*jns_instr_address == kJnsInstruction) { | 4899 if (*jns_instr_address == kJnsInstruction) { |
4899 ASSERT_EQ(kJnsOffset, *(call_target_address - 2)); | 4900 ASSERT_EQ(kJnsOffset, *(call_target_address - 2)); |
4900 ASSERT_EQ(isolate->builtins()->InterruptCheck()->entry(), | 4901 ASSERT_EQ(isolate->builtins()->InterruptCheck()->entry(), |
4901 Assembler::target_address_at(call_target_address)); | 4902 Assembler::target_address_at(call_target_address, |
| 4903 unoptimized_code)); |
4902 return INTERRUPT; | 4904 return INTERRUPT; |
4903 } | 4905 } |
4904 | 4906 |
4905 ASSERT_EQ(kNopByteOne, *jns_instr_address); | 4907 ASSERT_EQ(kNopByteOne, *jns_instr_address); |
4906 ASSERT_EQ(kNopByteTwo, *(call_target_address - 2)); | 4908 ASSERT_EQ(kNopByteTwo, *(call_target_address - 2)); |
4907 | 4909 |
4908 if (Assembler::target_address_at(call_target_address) == | 4910 if (Assembler::target_address_at(call_target_address, unoptimized_code) == |
4909 isolate->builtins()->OnStackReplacement()->entry()) { | 4911 isolate->builtins()->OnStackReplacement()->entry()) { |
4910 return ON_STACK_REPLACEMENT; | 4912 return ON_STACK_REPLACEMENT; |
4911 } | 4913 } |
4912 | 4914 |
4913 ASSERT_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), | 4915 ASSERT_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), |
4914 Assembler::target_address_at(call_target_address)); | 4916 Assembler::target_address_at(call_target_address, |
| 4917 unoptimized_code)); |
4915 return OSR_AFTER_STACK_CHECK; | 4918 return OSR_AFTER_STACK_CHECK; |
4916 } | 4919 } |
4917 | 4920 |
4918 | 4921 |
4919 } } // namespace v8::internal | 4922 } } // namespace v8::internal |
4920 | 4923 |
4921 #endif // V8_TARGET_ARCH_IA32 | 4924 #endif // V8_TARGET_ARCH_IA32 |
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