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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef V8_FRAMES_H_ | 5 #ifndef V8_FRAMES_H_ |
| 6 #define V8_FRAMES_H_ | 6 #define V8_FRAMES_H_ |
| 7 | 7 |
| 8 #include "src/allocation.h" | 8 #include "src/allocation.h" |
| 9 #include "src/handles.h" | 9 #include "src/handles.h" |
| 10 #include "src/safepoint-table.h" | 10 #include "src/safepoint-table.h" |
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| 81 static const int kSlotCount = kSize >> kPointerSizeLog2; | 81 static const int kSlotCount = kSize >> kPointerSizeLog2; |
| 82 }; | 82 }; |
| 83 | 83 |
| 84 | 84 |
| 85 class StackHandler BASE_EMBEDDED { | 85 class StackHandler BASE_EMBEDDED { |
| 86 public: | 86 public: |
| 87 enum Kind { | 87 enum Kind { |
| 88 JS_ENTRY, | 88 JS_ENTRY, |
| 89 CATCH, | 89 CATCH, |
| 90 FINALLY, | 90 FINALLY, |
| 91 LAST_KIND = FINALLY | |
| 92 }; | 91 }; |
| 93 | 92 |
| 94 static const int kKindWidth = 2; | |
| 95 STATIC_ASSERT(LAST_KIND < (1 << kKindWidth)); | |
| 96 static const int kIndexWidth = 32 - kKindWidth; | |
| 97 class KindField: public BitField<StackHandler::Kind, 0, kKindWidth> {}; | |
| 98 class IndexField: public BitField<unsigned, kKindWidth, kIndexWidth> {}; | |
| 99 | |
| 100 // Get the address of this stack handler. | 93 // Get the address of this stack handler. |
| 101 inline Address address() const; | 94 inline Address address() const; |
| 102 | 95 |
| 103 // Get the next stack handler in the chain. | 96 // Get the next stack handler in the chain. |
| 104 inline StackHandler* next() const; | 97 inline StackHandler* next() const; |
| 105 | 98 |
| 106 // Tells whether the given address is inside this handler. | 99 // Tells whether the given address is inside this handler. |
| 107 inline bool includes(Address address) const; | 100 inline bool includes(Address address) const; |
| 108 | 101 |
| 109 // Garbage collection support. | 102 // Garbage collection support. |
| 110 inline void Iterate(ObjectVisitor* v, Code* holder) const; | 103 inline void Iterate(ObjectVisitor* v, Code* holder) const; |
| 111 | 104 |
| 112 // Conversion support. | 105 // Conversion support. |
| 113 static inline StackHandler* FromAddress(Address address); | 106 static inline StackHandler* FromAddress(Address address); |
| 114 | 107 |
| 115 // Accessors. | 108 // Accessors. |
| 116 inline Context* context() const; | 109 inline Context* context() const; |
| 117 inline Kind kind() const; | 110 inline int index() const; |
| 118 inline unsigned index() const; | |
| 119 | |
| 120 // Testers. | |
| 121 inline bool is_js_entry() const; | |
| 122 inline bool is_catch() const; | |
| 123 inline bool is_finally() const; | |
| 124 | 111 |
| 125 // Generator support to preserve stack handlers. | 112 // Generator support to preserve stack handlers. |
| 126 void Unwind(Isolate* isolate, FixedArray* array, int offset, | 113 void Unwind(Isolate* isolate, FixedArray* array, int offset, |
| 127 int previous_handler_offset) const; | 114 int previous_handler_offset) const; |
| 128 int Rewind(Isolate* isolate, FixedArray* array, int offset, Address fp); | 115 int Rewind(Isolate* isolate, FixedArray* array, int offset, Address fp); |
| 129 | 116 |
| 130 private: | 117 private: |
| 131 inline Object** context_address() const; | 118 inline Object** context_address() const; |
| 132 | 119 |
| 133 DISALLOW_IMPLICIT_CONSTRUCTORS(StackHandler); | 120 DISALLOW_IMPLICIT_CONSTRUCTORS(StackHandler); |
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| 932 }; | 919 }; |
| 933 | 920 |
| 934 | 921 |
| 935 // Reads all frames on the current stack and copies them into the current | 922 // Reads all frames on the current stack and copies them into the current |
| 936 // zone memory. | 923 // zone memory. |
| 937 Vector<StackFrame*> CreateStackMap(Isolate* isolate, Zone* zone); | 924 Vector<StackFrame*> CreateStackMap(Isolate* isolate, Zone* zone); |
| 938 | 925 |
| 939 } } // namespace v8::internal | 926 } } // namespace v8::internal |
| 940 | 927 |
| 941 #endif // V8_FRAMES_H_ | 928 #endif // V8_FRAMES_H_ |
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