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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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86 | 86 |
87 class StackHandlerConstants : public AllStatic { | 87 class StackHandlerConstants : public AllStatic { |
88 public: | 88 public: |
89 static const int kNextOffset = 0 * kPointerSize; | 89 static const int kNextOffset = 0 * kPointerSize; |
90 static const int kCodeOffset = 1 * kPointerSize; | 90 static const int kCodeOffset = 1 * kPointerSize; |
91 static const int kStateOffset = 2 * kPointerSize; | 91 static const int kStateOffset = 2 * kPointerSize; |
92 static const int kContextOffset = 3 * kPointerSize; | 92 static const int kContextOffset = 3 * kPointerSize; |
93 static const int kFPOffset = 4 * kPointerSize; | 93 static const int kFPOffset = 4 * kPointerSize; |
94 | 94 |
95 static const int kSize = kFPOffset + kPointerSize; | 95 static const int kSize = kFPOffset + kPointerSize; |
| 96 static const int kSlotCount = kSize >> kPointerSizeLog2; |
96 }; | 97 }; |
97 | 98 |
98 | 99 |
99 class StackHandler BASE_EMBEDDED { | 100 class StackHandler BASE_EMBEDDED { |
100 public: | 101 public: |
101 enum Kind { | 102 enum Kind { |
102 JS_ENTRY, | 103 JS_ENTRY, |
103 CATCH, | 104 CATCH, |
104 FINALLY, | 105 FINALLY, |
105 LAST_KIND = FINALLY | 106 LAST_KIND = FINALLY |
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124 inline void Iterate(ObjectVisitor* v, Code* holder) const; | 125 inline void Iterate(ObjectVisitor* v, Code* holder) const; |
125 | 126 |
126 // Conversion support. | 127 // Conversion support. |
127 static inline StackHandler* FromAddress(Address address); | 128 static inline StackHandler* FromAddress(Address address); |
128 | 129 |
129 // Testers | 130 // Testers |
130 inline bool is_js_entry() const; | 131 inline bool is_js_entry() const; |
131 inline bool is_catch() const; | 132 inline bool is_catch() const; |
132 inline bool is_finally() const; | 133 inline bool is_finally() const; |
133 | 134 |
| 135 // Generator support to preserve stack handlers. |
| 136 void Unwind(Isolate* isolate, FixedArray* array, int offset, |
| 137 int previous_handler_offset) const; |
| 138 int Rewind(Isolate* isolate, FixedArray* array, int offset, Address fp); |
| 139 |
134 private: | 140 private: |
135 // Accessors. | 141 // Accessors. |
136 inline Kind kind() const; | 142 inline Kind kind() const; |
| 143 inline unsigned index() const; |
137 | 144 |
138 inline Object** context_address() const; | 145 inline Object** context_address() const; |
139 inline Object** code_address() const; | 146 inline Object** code_address() const; |
140 | 147 |
141 DISALLOW_IMPLICIT_CONSTRUCTORS(StackHandler); | 148 DISALLOW_IMPLICIT_CONSTRUCTORS(StackHandler); |
142 }; | 149 }; |
143 | 150 |
144 | 151 |
145 #define STACK_FRAME_TYPE_LIST(V) \ | 152 #define STACK_FRAME_TYPE_LIST(V) \ |
146 V(ENTRY, EntryFrame) \ | 153 V(ENTRY, EntryFrame) \ |
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534 inline Object* GetParameter(int index) const; | 541 inline Object* GetParameter(int index) const; |
535 inline int ComputeParametersCount() const { | 542 inline int ComputeParametersCount() const { |
536 return GetNumberOfIncomingArguments(); | 543 return GetNumberOfIncomingArguments(); |
537 } | 544 } |
538 | 545 |
539 // Access the operand stack. | 546 // Access the operand stack. |
540 inline Address GetOperandSlot(int index) const; | 547 inline Address GetOperandSlot(int index) const; |
541 inline Object* GetOperand(int index) const; | 548 inline Object* GetOperand(int index) const; |
542 inline int ComputeOperandsCount() const; | 549 inline int ComputeOperandsCount() const; |
543 | 550 |
| 551 // Generator support to preserve operand stack and stack handlers. |
| 552 void SaveOperandStack(FixedArray* store, int* stack_handler_index) const; |
| 553 void RestoreOperandStack(FixedArray* store, int stack_handler_index); |
| 554 |
544 // Debugger access. | 555 // Debugger access. |
545 void SetParameterValue(int index, Object* value) const; | 556 void SetParameterValue(int index, Object* value) const; |
546 | 557 |
547 // Check if this frame is a constructor frame invoked through 'new'. | 558 // Check if this frame is a constructor frame invoked through 'new'. |
548 bool IsConstructor() const; | 559 bool IsConstructor() const; |
549 | 560 |
550 // Check if this frame has "adapted" arguments in the sense that the | 561 // Check if this frame has "adapted" arguments in the sense that the |
551 // actual passed arguments are available in an arguments adaptor | 562 // actual passed arguments are available in an arguments adaptor |
552 // frame below it on the stack. | 563 // frame below it on the stack. |
553 inline bool has_adapted_arguments() const; | 564 inline bool has_adapted_arguments() const; |
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989 }; | 1000 }; |
990 | 1001 |
991 | 1002 |
992 // Reads all frames on the current stack and copies them into the current | 1003 // Reads all frames on the current stack and copies them into the current |
993 // zone memory. | 1004 // zone memory. |
994 Vector<StackFrame*> CreateStackMap(Isolate* isolate, Zone* zone); | 1005 Vector<StackFrame*> CreateStackMap(Isolate* isolate, Zone* zone); |
995 | 1006 |
996 } } // namespace v8::internal | 1007 } } // namespace v8::internal |
997 | 1008 |
998 #endif // V8_FRAMES_H_ | 1009 #endif // V8_FRAMES_H_ |
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