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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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104 V(EXIT, ExitFrame) \ | 104 V(EXIT, ExitFrame) \ |
105 V(JAVA_SCRIPT, JavaScriptFrame) \ | 105 V(JAVA_SCRIPT, JavaScriptFrame) \ |
106 V(OPTIMIZED, OptimizedFrame) \ | 106 V(OPTIMIZED, OptimizedFrame) \ |
107 V(INTERPRETED, InterpretedFrame) \ | 107 V(INTERPRETED, InterpretedFrame) \ |
108 V(STUB, StubFrame) \ | 108 V(STUB, StubFrame) \ |
109 V(STUB_FAILURE_TRAMPOLINE, StubFailureTrampolineFrame) \ | 109 V(STUB_FAILURE_TRAMPOLINE, StubFailureTrampolineFrame) \ |
110 V(INTERNAL, InternalFrame) \ | 110 V(INTERNAL, InternalFrame) \ |
111 V(CONSTRUCT, ConstructFrame) \ | 111 V(CONSTRUCT, ConstructFrame) \ |
112 V(ARGUMENTS_ADAPTOR, ArgumentsAdaptorFrame) | 112 V(ARGUMENTS_ADAPTOR, ArgumentsAdaptorFrame) |
113 | 113 |
| 114 // Every pointer in a frame has a slot id. On 32-bit platforms, doubles consume |
| 115 // two slots. |
| 116 // |
| 117 // Stack slot indices >= 0 access the callee stack with slot 0 corresponding to |
| 118 // the callee's saved return address and 1 corresponding to the saved frame |
| 119 // pointer. Some frames have additional information stored in the fixed header, |
| 120 // for example JSFunctions store the function context and marker in the fixed |
| 121 // header, with slot index 2 corresponding to the current function context and 3 |
| 122 // corresponding to the frame marker/JSFunction. |
| 123 // |
| 124 // slot JS frame |
| 125 // +-----------------+-------------------------------- |
| 126 // -n-1 | parameter 0 | ^ |
| 127 // |- - - - - - - - -| | |
| 128 // -n | | Caller |
| 129 // ... | ... | frame slots |
| 130 // -2 | parameter n-1 | (slot < 0) |
| 131 // |- - - - - - - - -| | |
| 132 // -1 | parameter n | v |
| 133 // -----+-----------------+-------------------------------- |
| 134 // 0 | return addr | ^ ^ |
| 135 // |- - - - - - - - -| | | |
| 136 // 1 | saved frame ptr | Fixed | |
| 137 // |- - - - - - - - -| Header <-- frame ptr | |
| 138 // 2 | [Constant Pool] | | | |
| 139 // |- - - - - - - - -| | | |
| 140 // 2+cp | Context | | if a constant pool | |
| 141 // |- - - - - - - - -| | is used, cp = 1, | |
| 142 // 3+cp |JSFunction/Marker| v otherwise, cp = 0 | |
| 143 // +-----------------+---- | |
| 144 // 4+cp | | ^ Callee |
| 145 // |- - - - - - - - -| | frame slots |
| 146 // ... | | Frame slots (slot >= 0) |
| 147 // |- - - - - - - - -| | | |
| 148 // | | v | |
| 149 // -----+-----------------+----- <-- stack ptr ------------- |
| 150 // |
114 | 151 |
115 class StandardFrameConstants : public AllStatic { | 152 class StandardFrameConstants : public AllStatic { |
116 public: | 153 public: |
117 // Fixed part of the frame consists of return address, caller fp, | 154 // Fixed part of the frame consists of return address, caller fp, |
118 // constant pool (if FLAG_enable_embedded_constant_pool), context, and | 155 // constant pool (if FLAG_enable_embedded_constant_pool), context, and |
119 // function. StandardFrame::IterateExpressions assumes that kLastObjectOffset | 156 // function. StandardFrame::IterateExpressions assumes that kLastObjectOffset |
120 // is the last object pointer. | 157 // is the last object pointer. |
121 static const int kCPSlotSize = | 158 static const int kCPSlotSize = |
122 FLAG_enable_embedded_constant_pool ? kPointerSize : 0; | 159 FLAG_enable_embedded_constant_pool ? kPointerSize : 0; |
123 static const int kFixedFrameSizeFromFp = 2 * kPointerSize + kCPSlotSize; | 160 static const int kFixedFrameSizeFromFp = 2 * kPointerSize + kCPSlotSize; |
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203 static const int kLastParamFromRegisterPointer = | 240 static const int kLastParamFromRegisterPointer = |
204 StandardFrameConstants::kFixedFrameSize + 4 * kPointerSize; | 241 StandardFrameConstants::kFixedFrameSize + 4 * kPointerSize; |
205 | 242 |
206 static const int kBytecodeOffsetFromRegisterPointer = 1 * kPointerSize; | 243 static const int kBytecodeOffsetFromRegisterPointer = 1 * kPointerSize; |
207 static const int kBytecodeArrayFromRegisterPointer = 2 * kPointerSize; | 244 static const int kBytecodeArrayFromRegisterPointer = 2 * kPointerSize; |
208 static const int kNewTargetFromRegisterPointer = 3 * kPointerSize; | 245 static const int kNewTargetFromRegisterPointer = 3 * kPointerSize; |
209 static const int kFunctionFromRegisterPointer = 4 * kPointerSize; | 246 static const int kFunctionFromRegisterPointer = 4 * kPointerSize; |
210 static const int kContextFromRegisterPointer = 5 * kPointerSize; | 247 static const int kContextFromRegisterPointer = 5 * kPointerSize; |
211 }; | 248 }; |
212 | 249 |
| 250 inline static int FPOffsetToFrameSlot(int frame_offset) { |
| 251 return StandardFrameConstants::kFixedSlotCountAboveFp - 1 - |
| 252 frame_offset / kPointerSize; |
| 253 } |
| 254 |
| 255 inline static int FrameSlotToFPOffset(int slot) { |
| 256 return (StandardFrameConstants::kFixedSlotCountAboveFp - 1 - slot) * |
| 257 kPointerSize; |
| 258 } |
213 | 259 |
214 // Abstract base class for all stack frames. | 260 // Abstract base class for all stack frames. |
215 class StackFrame BASE_EMBEDDED { | 261 class StackFrame BASE_EMBEDDED { |
216 public: | 262 public: |
217 #define DECLARE_TYPE(type, ignore) type, | 263 #define DECLARE_TYPE(type, ignore) type, |
218 enum Type { | 264 enum Type { |
219 NONE = 0, | 265 NONE = 0, |
220 STACK_FRAME_TYPE_LIST(DECLARE_TYPE) | 266 STACK_FRAME_TYPE_LIST(DECLARE_TYPE) |
221 NUMBER_OF_TYPES, | 267 NUMBER_OF_TYPES, |
222 // Used by FrameScope to indicate that the stack frame is constructed | 268 // Used by FrameScope to indicate that the stack frame is constructed |
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1009 | 1055 |
1010 | 1056 |
1011 // Reads all frames on the current stack and copies them into the current | 1057 // Reads all frames on the current stack and copies them into the current |
1012 // zone memory. | 1058 // zone memory. |
1013 Vector<StackFrame*> CreateStackMap(Isolate* isolate, Zone* zone); | 1059 Vector<StackFrame*> CreateStackMap(Isolate* isolate, Zone* zone); |
1014 | 1060 |
1015 } // namespace internal | 1061 } // namespace internal |
1016 } // namespace v8 | 1062 } // namespace v8 |
1017 | 1063 |
1018 #endif // V8_FRAMES_H_ | 1064 #endif // V8_FRAMES_H_ |
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