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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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| 924 Address pc, | 924 Address pc, |
| 925 BackEdgeState target_state, | 925 BackEdgeState target_state, |
| 926 Code* replacement_code); | 926 Code* replacement_code); |
| 927 | 927 |
| 928 // Change all patched back edges back to normal interrupts. | 928 // Change all patched back edges back to normal interrupts. |
| 929 static void Revert(Isolate* isolate, | 929 static void Revert(Isolate* isolate, |
| 930 Code* unoptimized_code); | 930 Code* unoptimized_code); |
| 931 | 931 |
| 932 // Change a back edge patched for on-stack replacement to perform a | 932 // Change a back edge patched for on-stack replacement to perform a |
| 933 // stack check first. | 933 // stack check first. |
| 934 static void AddStackCheck(CompilationInfo* info); | 934 static void AddStackCheck(Handle<Code> code, uint32_t pc_offset); |
| 935 | 935 |
| 936 // Remove the stack check, if available, and replace by on-stack replacement. | 936 // Revert the patch by AddStackCheck. |
| 937 static void RemoveStackCheck(CompilationInfo* info); | 937 static void RemoveStackCheck(Handle<Code> code, uint32_t pc_offset); |
| 938 | 938 |
| 939 // Return the current patch state of the back edge. | 939 // Return the current patch state of the back edge. |
| 940 static BackEdgeState GetBackEdgeState(Isolate* isolate, | 940 static BackEdgeState GetBackEdgeState(Isolate* isolate, |
| 941 Code* unoptimized_code, | 941 Code* unoptimized_code, |
| 942 Address pc_after); | 942 Address pc_after); |
| 943 | 943 |
| 944 #ifdef DEBUG | 944 #ifdef DEBUG |
| 945 // Verify that all back edges of a certain loop depth are patched. | 945 // Verify that all back edges of a certain loop depth are patched. |
| 946 static bool Verify(Isolate* isolate, | 946 static bool Verify(Isolate* isolate, |
| 947 Code* unoptimized_code, | 947 Code* unoptimized_code, |
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| 962 | 962 |
| 963 Address start_; | 963 Address start_; |
| 964 Address instruction_start_; | 964 Address instruction_start_; |
| 965 uint32_t length_; | 965 uint32_t length_; |
| 966 }; | 966 }; |
| 967 | 967 |
| 968 | 968 |
| 969 } } // namespace v8::internal | 969 } } // namespace v8::internal |
| 970 | 970 |
| 971 #endif // V8_FULL_CODEGEN_H_ | 971 #endif // V8_FULL_CODEGEN_H_ |
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