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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, 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_LONGJUMP_H_ | 5 #ifndef VM_LONGJUMP_H_ |
6 #define VM_LONGJUMP_H_ | 6 #define VM_LONGJUMP_H_ |
7 | 7 |
8 #include <setjmp.h> | 8 #include <setjmp.h> |
9 | 9 |
10 #include "vm/allocation.h" | 10 #include "vm/allocation.h" |
| 11 #include "vm/isolate.h" |
11 | 12 |
12 namespace dart { | 13 namespace dart { |
13 | 14 |
14 class Error; | 15 class Error; |
15 | 16 |
16 class LongJump : public ValueObject { | 17 class LongJumpScope : public StackResource { |
17 public: | 18 public: |
18 LongJump() : top_(NULL) { } | 19 LongJumpScope() |
| 20 : StackResource(Isolate::Current()), |
| 21 top_(NULL), |
| 22 base_(Isolate::Current()->long_jump_base()) { |
| 23 Isolate::Current()->set_long_jump_base(this); |
| 24 } |
| 25 |
| 26 ~LongJumpScope() { |
| 27 Isolate::Current()->set_long_jump_base(base_); |
| 28 } |
19 | 29 |
20 jmp_buf* Set(); | 30 jmp_buf* Set(); |
21 void Jump(int value, const Error& error); | 31 void Jump(int value, const Error& error); |
22 | 32 |
23 // Would it be safe to use this longjump? | 33 // Would it be safe to use this longjump? |
24 // | 34 // |
25 // Checks to make sure that the jump would not cross Dart frames. | 35 // Checks to make sure that the jump would not cross Dart frames. |
26 bool IsSafeToJump(); | 36 bool IsSafeToJump(); |
27 | 37 |
28 private: | 38 private: |
29 jmp_buf environment_; | 39 jmp_buf environment_; |
30 StackResource* top_; | 40 StackResource* top_; |
| 41 LongJumpScope* base_; |
31 | 42 |
32 DISALLOW_COPY_AND_ASSIGN(LongJump); | 43 DISALLOW_COPY_AND_ASSIGN(LongJumpScope); |
33 }; | 44 }; |
34 | 45 |
35 } // namespace dart | 46 } // namespace dart |
36 | 47 |
37 #endif // VM_LONGJUMP_H_ | 48 #endif // VM_LONGJUMP_H_ |
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