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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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56 int call_end = codegen_->masm()->pc_offset() + call_size; | 56 int call_end = codegen_->masm()->pc_offset() + call_size; |
57 int prev_jump_end = codegen_->LastSafepointEnd() + kMinSafepointSize; | 57 int prev_jump_end = codegen_->LastSafepointEnd() + kMinSafepointSize; |
58 if (call_end < prev_jump_end) { | 58 if (call_end < prev_jump_end) { |
59 int padding_size = prev_jump_end - call_end; | 59 int padding_size = prev_jump_end - call_end; |
60 STATIC_ASSERT(kMinSafepointSize <= 9); // One multibyte nop is enough. | 60 STATIC_ASSERT(kMinSafepointSize <= 9); // One multibyte nop is enough. |
61 codegen_->masm()->nop(padding_size); | 61 codegen_->masm()->nop(padding_size); |
62 } | 62 } |
63 } | 63 } |
64 | 64 |
65 virtual void AfterCall() { | 65 virtual void AfterCall() { |
66 // Ensure that we have enough space in the reloc info to patch | |
67 // this with calls when doing deoptimization. | |
68 codegen_->masm()->RecordComment(RelocInfo::kFillerCommentString, true); | |
69 codegen_->RecordSafepoint(pointers_, deoptimization_index_); | 66 codegen_->RecordSafepoint(pointers_, deoptimization_index_); |
70 } | 67 } |
71 | 68 |
72 private: | 69 private: |
73 static const int kMinSafepointSize = | 70 static const int kMinSafepointSize = |
74 MacroAssembler::kShortCallInstructionLength; | 71 MacroAssembler::kShortCallInstructionLength; |
75 LCodeGen* codegen_; | 72 LCodeGen* codegen_; |
76 LPointerMap* pointers_; | 73 LPointerMap* pointers_; |
77 int deoptimization_index_; | 74 int deoptimization_index_; |
78 }; | 75 }; |
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3943 RegisterEnvironmentForDeoptimization(environment); | 3940 RegisterEnvironmentForDeoptimization(environment); |
3944 ASSERT(osr_pc_offset_ == -1); | 3941 ASSERT(osr_pc_offset_ == -1); |
3945 osr_pc_offset_ = masm()->pc_offset(); | 3942 osr_pc_offset_ = masm()->pc_offset(); |
3946 } | 3943 } |
3947 | 3944 |
3948 #undef __ | 3945 #undef __ |
3949 | 3946 |
3950 } } // namespace v8::internal | 3947 } } // namespace v8::internal |
3951 | 3948 |
3952 #endif // V8_TARGET_ARCH_X64 | 3949 #endif // V8_TARGET_ARCH_X64 |
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