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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_GLOBALS_H_ | 5 #ifndef V8_GLOBALS_H_ |
6 #define V8_GLOBALS_H_ | 6 #define V8_GLOBALS_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
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1206 // All objects are at least pointer aligned, so we can remove the trailing | 1206 // All objects are at least pointer aligned, so we can remove the trailing |
1207 // zeros. | 1207 // zeros. |
1208 return static_cast<uint32_t>(bit_cast<uintptr_t>(address) >> | 1208 return static_cast<uint32_t>(bit_cast<uintptr_t>(address) >> |
1209 kPointerSizeLog2); | 1209 kPointerSizeLog2); |
1210 } | 1210 } |
1211 | 1211 |
1212 // Type feedback is encoded in such a way that, we can combine the feedback | 1212 // Type feedback is encoded in such a way that, we can combine the feedback |
1213 // at different points by performing an 'OR' operation. Type feedback moves | 1213 // at different points by performing an 'OR' operation. Type feedback moves |
1214 // to a more generic type when we combine feedback. | 1214 // to a more generic type when we combine feedback. |
1215 // kSignedSmall -> kNumber -> kAny | 1215 // kSignedSmall -> kNumber -> kAny |
| 1216 // kString -> kAny |
1216 class BinaryOperationFeedback { | 1217 class BinaryOperationFeedback { |
1217 public: | 1218 public: |
1218 enum { kNone = 0x00, kSignedSmall = 0x01, kNumber = 0x3, kAny = 0x7 }; | 1219 enum { |
| 1220 kNone = 0x0, |
| 1221 kSignedSmall = 0x1, |
| 1222 kNumber = 0x3, |
| 1223 kString = 0x4, |
| 1224 kAny = 0xF |
| 1225 }; |
1219 }; | 1226 }; |
1220 | 1227 |
1221 // TODO(epertoso): consider unifying this with BinaryOperationFeedback. | 1228 // TODO(epertoso): consider unifying this with BinaryOperationFeedback. |
1222 class CompareOperationFeedback { | 1229 class CompareOperationFeedback { |
1223 public: | 1230 public: |
1224 enum { kNone = 0x00, kSignedSmall = 0x01, kNumber = 0x3, kAny = 0x7 }; | 1231 enum { kNone = 0x00, kSignedSmall = 0x01, kNumber = 0x3, kAny = 0x7 }; |
1225 }; | 1232 }; |
1226 | 1233 |
1227 // Describes how exactly a frame has been dropped from stack. | 1234 // Describes how exactly a frame has been dropped from stack. |
1228 enum LiveEditFrameDropMode { | 1235 enum LiveEditFrameDropMode { |
1229 // No frame has been dropped. | 1236 // No frame has been dropped. |
1230 LIVE_EDIT_FRAMES_UNTOUCHED, | 1237 LIVE_EDIT_FRAMES_UNTOUCHED, |
1231 // The top JS frame had been calling debug break slot stub. Patch the | 1238 // The top JS frame had been calling debug break slot stub. Patch the |
1232 // address this stub jumps to in the end. | 1239 // address this stub jumps to in the end. |
1233 LIVE_EDIT_FRAME_DROPPED_IN_DEBUG_SLOT_CALL, | 1240 LIVE_EDIT_FRAME_DROPPED_IN_DEBUG_SLOT_CALL, |
1234 // The top JS frame had been calling some C++ function. The return address | 1241 // The top JS frame had been calling some C++ function. The return address |
1235 // gets patched automatically. | 1242 // gets patched automatically. |
1236 LIVE_EDIT_FRAME_DROPPED_IN_DIRECT_CALL, | 1243 LIVE_EDIT_FRAME_DROPPED_IN_DIRECT_CALL, |
1237 LIVE_EDIT_FRAME_DROPPED_IN_RETURN_CALL, | 1244 LIVE_EDIT_FRAME_DROPPED_IN_RETURN_CALL, |
1238 LIVE_EDIT_CURRENTLY_SET_MODE | 1245 LIVE_EDIT_CURRENTLY_SET_MODE |
1239 }; | 1246 }; |
1240 | 1247 |
1241 } // namespace internal | 1248 } // namespace internal |
1242 } // namespace v8 | 1249 } // namespace v8 |
1243 | 1250 |
1244 namespace i = v8::internal; | 1251 namespace i = v8::internal; |
1245 | 1252 |
1246 #endif // V8_GLOBALS_H_ | 1253 #endif // V8_GLOBALS_H_ |
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