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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #ifndef VM_CODE_DESCRIPTORS_H_ | 5 #ifndef VM_CODE_DESCRIPTORS_H_ |
6 #define VM_CODE_DESCRIPTORS_H_ | 6 #define VM_CODE_DESCRIPTORS_H_ |
7 | 7 |
8 #include "vm/ast.h" | 8 #include "vm/ast.h" |
9 #include "vm/code_generator.h" | 9 #include "vm/code_generator.h" |
10 #include "vm/globals.h" | 10 #include "vm/globals.h" |
11 #include "vm/growable_array.h" | 11 #include "vm/growable_array.h" |
12 #include "vm/object.h" | 12 #include "vm/object.h" |
13 | 13 |
14 namespace dart { | 14 namespace dart { |
15 | 15 |
16 class DescriptorList : public ZoneAllocated { | 16 class DescriptorList : public ZoneAllocated { |
17 public: | 17 public: |
18 struct PcDesc { | 18 explicit DescriptorList(intptr_t initial_capacity) |
19 intptr_t pc_offset; // PC offset value of the descriptor. | 19 : encoded_data_(initial_capacity), |
20 RawPcDescriptors::Kind kind; // Descriptor kind (kDeopt, kOther). | 20 prev_pc_offset(0), |
21 intptr_t deopt_id; // Deoptimization id. | 21 prev_deopt_id(0), |
22 intptr_t data; // Token position or deopt reason. | 22 prev_token_pos(0) {} |
23 intptr_t try_index; // Try block index of PC or deopt array index. | |
24 void SetTokenPos(intptr_t value) { data = value; } | |
25 intptr_t TokenPos() const { return data; } | |
26 void SetDeoptReason(ICData::DeoptReasonId value) { data = value; } | |
27 ICData::DeoptReasonId DeoptReason() const { | |
28 ASSERT((0 <= data) && (data < ICData::kDeoptNumReasons)); | |
29 return static_cast<ICData::DeoptReasonId>(data); | |
30 } | |
31 }; | |
32 | 23 |
33 explicit DescriptorList(intptr_t initial_capacity) | |
34 : list_(initial_capacity), has_try_index_(false) {} | |
35 ~DescriptorList() { } | 24 ~DescriptorList() { } |
36 | 25 |
37 intptr_t Length() const { | |
38 return list_.length(); | |
39 } | |
40 | |
41 intptr_t PcOffset(intptr_t index) const { | |
42 return list_[index].pc_offset; | |
43 } | |
44 RawPcDescriptors::Kind Kind(intptr_t index) const { | |
45 return list_[index].kind; | |
46 } | |
47 intptr_t DeoptId(intptr_t index) const { | |
48 return list_[index].deopt_id; | |
49 } | |
50 intptr_t TokenPos(intptr_t index) const { | |
51 return list_[index].TokenPos(); | |
52 } | |
53 ICData::DeoptReasonId DeoptReason(intptr_t index) const { | |
54 return list_[index].DeoptReason(); | |
55 } | |
56 intptr_t TryIndex(intptr_t index) const { | |
57 return (has_try_index_) ? list_[index].try_index : -1; | |
58 } | |
59 | |
60 void AddDescriptor(RawPcDescriptors::Kind kind, | 26 void AddDescriptor(RawPcDescriptors::Kind kind, |
61 intptr_t pc_offset, | 27 intptr_t pc_offset, |
62 intptr_t deopt_id, | 28 intptr_t deopt_id, |
63 intptr_t token_index, | 29 intptr_t token_pos, |
64 intptr_t try_index); | 30 intptr_t try_index); |
65 | 31 |
66 RawPcDescriptors* FinalizePcDescriptors(uword entry_point); | 32 RawPcDescriptors* FinalizePcDescriptors(uword entry_point); |
67 | 33 |
68 private: | 34 private: |
69 GrowableArray<struct PcDesc> list_; | 35 GrowableArray<uint8_t> encoded_data_; |
70 bool has_try_index_; | 36 |
| 37 intptr_t prev_pc_offset; |
| 38 intptr_t prev_deopt_id; |
| 39 intptr_t prev_token_pos; |
| 40 |
71 DISALLOW_COPY_AND_ASSIGN(DescriptorList); | 41 DISALLOW_COPY_AND_ASSIGN(DescriptorList); |
72 }; | 42 }; |
73 | 43 |
74 | 44 |
75 class StackmapTableBuilder : public ZoneAllocated { | 45 class StackmapTableBuilder : public ZoneAllocated { |
76 public: | 46 public: |
77 StackmapTableBuilder() | 47 StackmapTableBuilder() |
78 : stack_map_(Stackmap::ZoneHandle()), | 48 : stack_map_(Stackmap::ZoneHandle()), |
79 list_(GrowableObjectArray::ZoneHandle( | 49 list_(GrowableObjectArray::ZoneHandle( |
80 GrowableObjectArray::New(Heap::kOld))) { } | 50 GrowableObjectArray::New(Heap::kOld))) { } |
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165 RawExceptionHandlers* FinalizeExceptionHandlers(uword entry_point) const; | 135 RawExceptionHandlers* FinalizeExceptionHandlers(uword entry_point) const; |
166 | 136 |
167 private: | 137 private: |
168 GrowableArray<struct HandlerDesc> list_; | 138 GrowableArray<struct HandlerDesc> list_; |
169 DISALLOW_COPY_AND_ASSIGN(ExceptionHandlerList); | 139 DISALLOW_COPY_AND_ASSIGN(ExceptionHandlerList); |
170 }; | 140 }; |
171 | 141 |
172 } // namespace dart | 142 } // namespace dart |
173 | 143 |
174 #endif // VM_CODE_DESCRIPTORS_H_ | 144 #endif // VM_CODE_DESCRIPTORS_H_ |
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