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1 // Copyright 2016 the V8 project authors. All rights reserved. | 1 // Copyright 2016 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_INTERPRETER_HANDLER_TABLE_BUILDER_H_ | 5 #ifndef V8_INTERPRETER_HANDLER_TABLE_BUILDER_H_ |
6 #define V8_INTERPRETER_HANDLER_TABLE_BUILDER_H_ | 6 #define V8_INTERPRETER_HANDLER_TABLE_BUILDER_H_ |
7 | 7 |
8 #include "src/handles.h" | 8 #include "src/handles.h" |
9 #include "src/interpreter/bytecode-register.h" | 9 #include "src/interpreter/bytecode-register.h" |
10 #include "src/interpreter/bytecodes.h" | 10 #include "src/interpreter/bytecodes.h" |
11 #include "src/zone-containers.h" | 11 #include "src/zone-containers.h" |
12 | 12 |
13 namespace v8 { | 13 namespace v8 { |
14 namespace internal { | 14 namespace internal { |
15 | 15 |
16 class HandlerTable; | 16 class HandlerTable; |
17 class Isolate; | 17 class Isolate; |
18 | 18 |
19 namespace interpreter { | 19 namespace interpreter { |
20 | 20 |
21 // A helper class for constructing exception handler tables for the interpreter. | 21 // A helper class for constructing exception handler tables for the interpreter. |
22 class HandlerTableBuilder final BASE_EMBEDDED { | 22 class HandlerTableBuilder final BASE_EMBEDDED { |
23 public: | 23 public: |
24 HandlerTableBuilder(Isolate* isolate, Zone* zone); | 24 explicit HandlerTableBuilder(Zone* zone); |
25 | 25 |
26 // Builds the actual handler table by copying the current values into a heap | 26 // Builds the actual handler table by copying the current values into a heap |
27 // object. Any further mutations to the builder won't be reflected. | 27 // object. Any further mutations to the builder won't be reflected. |
28 Handle<HandlerTable> ToHandlerTable(); | 28 Handle<HandlerTable> ToHandlerTable(Isolate* isolate); |
29 | 29 |
30 // Creates a new handler table entry and returns a {hander_id} identifying the | 30 // Creates a new handler table entry and returns a {hander_id} identifying the |
31 // entry, so that it can be referenced by below setter functions. | 31 // entry, so that it can be referenced by below setter functions. |
32 int NewHandlerEntry(); | 32 int NewHandlerEntry(); |
33 | 33 |
34 // Setter functions that modify certain values within the handler table entry | 34 // Setter functions that modify certain values within the handler table entry |
35 // being referenced by the given {handler_id}. All values will be encoded by | 35 // being referenced by the given {handler_id}. All values will be encoded by |
36 // the resulting {HandlerTable} class when copied into the heap. | 36 // the resulting {HandlerTable} class when copied into the heap. |
37 void SetTryRegionStart(int handler_id, size_t offset); | 37 void SetTryRegionStart(int handler_id, size_t offset); |
38 void SetTryRegionEnd(int handler_id, size_t offset); | 38 void SetTryRegionEnd(int handler_id, size_t offset); |
39 void SetHandlerTarget(int handler_id, size_t offset); | 39 void SetHandlerTarget(int handler_id, size_t offset); |
40 void SetPrediction(int handler_id, HandlerTable::CatchPrediction prediction); | 40 void SetPrediction(int handler_id, HandlerTable::CatchPrediction prediction); |
41 void SetContextRegister(int handler_id, Register reg); | 41 void SetContextRegister(int handler_id, Register reg); |
42 | 42 |
43 private: | 43 private: |
44 struct Entry { | 44 struct Entry { |
45 size_t offset_start; // Bytecode offset starting try-region. | 45 size_t offset_start; // Bytecode offset starting try-region. |
46 size_t offset_end; // Bytecode offset ending try-region. | 46 size_t offset_end; // Bytecode offset ending try-region. |
47 size_t offset_target; // Bytecode offset of handler target. | 47 size_t offset_target; // Bytecode offset of handler target. |
48 Register context; // Register holding context for handler. | 48 Register context; // Register holding context for handler. |
49 // Optimistic prediction for handler. | 49 // Optimistic prediction for handler. |
50 HandlerTable::CatchPrediction catch_prediction_; | 50 HandlerTable::CatchPrediction catch_prediction_; |
51 }; | 51 }; |
52 | 52 |
53 Isolate* isolate_; | |
54 ZoneVector<Entry> entries_; | 53 ZoneVector<Entry> entries_; |
55 | 54 |
56 DISALLOW_COPY_AND_ASSIGN(HandlerTableBuilder); | 55 DISALLOW_COPY_AND_ASSIGN(HandlerTableBuilder); |
57 }; | 56 }; |
58 | 57 |
59 } // namespace interpreter | 58 } // namespace interpreter |
60 } // namespace internal | 59 } // namespace internal |
61 } // namespace v8 | 60 } // namespace v8 |
62 | 61 |
63 #endif // V8_INTERPRETER_HANDLER_TABLE_BUILDER_H_ | 62 #endif // V8_INTERPRETER_HANDLER_TABLE_BUILDER_H_ |
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