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Issue 1155703006: Revert of Embedded constant pools. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 6 months ago
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1 // Copyright (c) 1994-2006 Sun Microsystems Inc. 1 // Copyright (c) 1994-2006 Sun Microsystems Inc.
2 // All Rights Reserved. 2 // All Rights Reserved.
3 // 3 //
4 // Redistribution and use in source and binary forms, with or without 4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are 5 // modification, are permitted provided that the following conditions are
6 // met: 6 // met:
7 // 7 //
8 // - Redistributions of source code must retain the above copyright notice, 8 // - Redistributions of source code must retain the above copyright notice,
9 // this list of conditions and the following disclaimer. 9 // this list of conditions and the following disclaimer.
10 // 10 //
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488 // TODO(vitalyr): the assembler does not need an isolate. 488 // TODO(vitalyr): the assembler does not need an isolate.
489 Assembler(Isolate* isolate, void* buffer, int buffer_size); 489 Assembler(Isolate* isolate, void* buffer, int buffer_size);
490 virtual ~Assembler() { } 490 virtual ~Assembler() { }
491 491
492 // GetCode emits any pending (non-emitted) code and fills the descriptor 492 // GetCode emits any pending (non-emitted) code and fills the descriptor
493 // desc. GetCode() is idempotent; it returns the same result if no other 493 // desc. GetCode() is idempotent; it returns the same result if no other
494 // Assembler functions are invoked in between GetCode() calls. 494 // Assembler functions are invoked in between GetCode() calls.
495 void GetCode(CodeDesc* desc); 495 void GetCode(CodeDesc* desc);
496 496
497 // Read/Modify the code target in the branch/call instruction at pc. 497 // Read/Modify the code target in the branch/call instruction at pc.
498 inline static Address target_address_at(Address pc, Address constant_pool); 498 inline static Address target_address_at(Address pc,
499 inline static void set_target_address_at( 499 ConstantPoolArray* constant_pool);
500 Address pc, Address constant_pool, Address target, 500 inline static void set_target_address_at(Address pc,
501 ICacheFlushMode icache_flush_mode = FLUSH_ICACHE_IF_NEEDED); 501 ConstantPoolArray* constant_pool,
502 Address target,
503 ICacheFlushMode icache_flush_mode =
504 FLUSH_ICACHE_IF_NEEDED);
502 static inline Address target_address_at(Address pc, Code* code) { 505 static inline Address target_address_at(Address pc, Code* code) {
503 Address constant_pool = code ? code->constant_pool() : NULL; 506 ConstantPoolArray* constant_pool = code ? code->constant_pool() : NULL;
504 return target_address_at(pc, constant_pool); 507 return target_address_at(pc, constant_pool);
505 } 508 }
506 static inline void set_target_address_at(Address pc, 509 static inline void set_target_address_at(Address pc,
507 Code* code, 510 Code* code,
508 Address target, 511 Address target,
509 ICacheFlushMode icache_flush_mode = 512 ICacheFlushMode icache_flush_mode =
510 FLUSH_ICACHE_IF_NEEDED) { 513 FLUSH_ICACHE_IF_NEEDED) {
511 Address constant_pool = code ? code->constant_pool() : NULL; 514 ConstantPoolArray* constant_pool = code ? code->constant_pool() : NULL;
512 set_target_address_at(pc, constant_pool, target); 515 set_target_address_at(pc, constant_pool, target);
513 } 516 }
514 517
515 // Return the code target address at a call site from the return address 518 // Return the code target address at a call site from the return address
516 // of that call in the instruction stream. 519 // of that call in the instruction stream.
517 inline static Address target_address_from_return_address(Address pc); 520 inline static Address target_address_from_return_address(Address pc);
518 521
519 // Return the code target address of the patch debug break slot 522 // Return the code target address of the patch debug break slot
520 inline static Address break_address_from_return_address(Address pc); 523 inline static Address break_address_from_return_address(Address pc);
521 524
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942 void RecordComment(const char* msg); 945 void RecordComment(const char* msg);
943 946
944 // Record a deoptimization reason that can be used by a log or cpu profiler. 947 // Record a deoptimization reason that can be used by a log or cpu profiler.
945 // Use --trace-deopt to enable. 948 // Use --trace-deopt to enable.
946 void RecordDeoptReason(const int reason, const SourcePosition position); 949 void RecordDeoptReason(const int reason, const SourcePosition position);
947 950
948 // Writes a single byte or word of data in the code stream. Used for 951 // Writes a single byte or word of data in the code stream. Used for
949 // inline tables, e.g., jump-tables. 952 // inline tables, e.g., jump-tables.
950 void db(uint8_t data); 953 void db(uint8_t data);
951 void dd(uint32_t data); 954 void dd(uint32_t data);
952 void dq(uint64_t data);
953 void dp(uintptr_t data) { dd(data); }
954 void dd(Label* label); 955 void dd(Label* label);
955 956
956 // Check if there is less than kGap bytes available in the buffer. 957 // Check if there is less than kGap bytes available in the buffer.
957 // If this is the case, we need to grow the buffer before emitting 958 // If this is the case, we need to grow the buffer before emitting
958 // an instruction or relocation information. 959 // an instruction or relocation information.
959 inline bool buffer_overflow() const { 960 inline bool buffer_overflow() const {
960 return pc_ >= reloc_info_writer.pos() - kGap; 961 return pc_ >= reloc_info_writer.pos() - kGap;
961 } 962 }
962 963
963 // Get the number of bytes available in the buffer. 964 // Get the number of bytes available in the buffer.
964 inline int available_space() const { return reloc_info_writer.pos() - pc_; } 965 inline int available_space() const { return reloc_info_writer.pos() - pc_; }
965 966
966 static bool IsNop(Address addr); 967 static bool IsNop(Address addr);
967 968
968 PositionsRecorder* positions_recorder() { return &positions_recorder_; } 969 PositionsRecorder* positions_recorder() { return &positions_recorder_; }
969 970
970 int relocation_writer_size() { 971 int relocation_writer_size() {
971 return (buffer_ + buffer_size_) - reloc_info_writer.pos(); 972 return (buffer_ + buffer_size_) - reloc_info_writer.pos();
972 } 973 }
973 974
974 // Avoid overflows for displacements etc. 975 // Avoid overflows for displacements etc.
975 static const int kMaximalBufferSize = 512*MB; 976 static const int kMaximalBufferSize = 512*MB;
976 977
977 byte byte_at(int pos) { return buffer_[pos]; } 978 byte byte_at(int pos) { return buffer_[pos]; }
978 void set_byte_at(int pos, byte value) { buffer_[pos] = value; } 979 void set_byte_at(int pos, byte value) { buffer_[pos] = value; }
979 980
980 void PatchConstantPoolAccessInstruction(int pc_offset, int offset, 981 // Allocate a constant pool of the correct size for the generated code.
981 ConstantPoolEntry::Access access, 982 Handle<ConstantPoolArray> NewConstantPool(Isolate* isolate);
982 ConstantPoolEntry::Type type) { 983
983 // No embedded constant pool support. 984 // Generate the constant pool for the generated code.
984 UNREACHABLE(); 985 void PopulateConstantPool(ConstantPoolArray* constant_pool);
985 }
986 986
987 protected: 987 protected:
988 byte* addr_at(int pos) { return buffer_ + pos; } 988 byte* addr_at(int pos) { return buffer_ + pos; }
989 989
990 990
991 private: 991 private:
992 uint32_t long_at(int pos) { 992 uint32_t long_at(int pos) {
993 return *reinterpret_cast<uint32_t*>(addr_at(pos)); 993 return *reinterpret_cast<uint32_t*>(addr_at(pos));
994 } 994 }
995 void long_at_put(int pos, uint32_t x) { 995 void long_at_put(int pos, uint32_t x) {
996 *reinterpret_cast<uint32_t*>(addr_at(pos)) = x; 996 *reinterpret_cast<uint32_t*>(addr_at(pos)) = x;
997 } 997 }
998 998
999 // code emission 999 // code emission
1000 void GrowBuffer(); 1000 void GrowBuffer();
1001 inline void emit(uint32_t x); 1001 inline void emit(uint32_t x);
1002 inline void emit(Handle<Object> handle); 1002 inline void emit(Handle<Object> handle);
1003 inline void emit(uint32_t x, 1003 inline void emit(uint32_t x,
1004 RelocInfo::Mode rmode, 1004 RelocInfo::Mode rmode,
1005 TypeFeedbackId id = TypeFeedbackId::None()); 1005 TypeFeedbackId id = TypeFeedbackId::None());
1006 inline void emit(Handle<Code> code, 1006 inline void emit(Handle<Code> code,
1007 RelocInfo::Mode rmode, 1007 RelocInfo::Mode rmode,
1008 TypeFeedbackId id = TypeFeedbackId::None()); 1008 TypeFeedbackId id = TypeFeedbackId::None());
1009 inline void emit(const Immediate& x); 1009 inline void emit(const Immediate& x);
1010 inline void emit_w(const Immediate& x); 1010 inline void emit_w(const Immediate& x);
1011 inline void emit_q(uint64_t x);
1012 1011
1013 // Emit the code-object-relative offset of the label's position 1012 // Emit the code-object-relative offset of the label's position
1014 inline void emit_code_relative_offset(Label* label); 1013 inline void emit_code_relative_offset(Label* label);
1015 1014
1016 // instruction generation 1015 // instruction generation
1017 void emit_arith_b(int op1, int op2, Register dst, int imm8); 1016 void emit_arith_b(int op1, int op2, Register dst, int imm8);
1018 1017
1019 // Emit a basic arithmetic instruction (i.e. first byte of the family is 0x81) 1018 // Emit a basic arithmetic instruction (i.e. first byte of the family is 0x81)
1020 // with a given destination expression and an immediate operand. It attempts 1019 // with a given destination expression and an immediate operand. It attempts
1021 // to use the shortest encoding possible. 1020 // to use the shortest encoding possible.
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1080 private: 1079 private:
1081 Assembler* assembler_; 1080 Assembler* assembler_;
1082 #ifdef DEBUG 1081 #ifdef DEBUG
1083 int space_before_; 1082 int space_before_;
1084 #endif 1083 #endif
1085 }; 1084 };
1086 1085
1087 } } // namespace v8::internal 1086 } } // namespace v8::internal
1088 1087
1089 #endif // V8_X87_ASSEMBLER_X87_H_ 1088 #endif // V8_X87_ASSEMBLER_X87_H_
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