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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 #include "vm/longjump.h" | 5 #include "vm/longjump.h" |
6 | 6 |
7 #include "include/dart_api.h" | 7 #include "include/dart_api.h" |
8 | 8 |
9 #include "vm/dart_api_impl.h" | 9 #include "vm/dart_api_impl.h" |
10 #include "vm/isolate.h" | 10 #include "vm/isolate.h" |
11 #include "vm/object.h" | 11 #include "vm/object.h" |
12 #include "vm/object_store.h" | 12 #include "vm/object_store.h" |
13 #include "vm/os.h" | 13 #include "vm/os.h" |
14 #include "vm/simulator.h" | 14 #include "vm/simulator.h" |
15 | 15 |
16 namespace dart { | 16 namespace dart { |
17 | 17 |
18 jmp_buf* LongJumpScope::Set() { | 18 jmp_buf* LongJumpScope::Set() { |
19 ASSERT(top_ == NULL); | 19 ASSERT(top_ == NULL); |
20 top_ = Thread::Current()->top_resource(); | 20 top_ = Thread::Current()->top_resource(); |
21 return &environment_; | 21 return &environment_; |
22 } | 22 } |
23 | 23 |
24 | 24 |
25 bool LongJumpScope::IsSafeToJump() { | 25 bool LongJumpScope::IsSafeToJump() { |
26 // We do not want to jump past Dart frames. Note that this code | 26 // We do not want to jump past Dart frames. Note that this code |
27 // assumes the stack grows from high to low. | 27 // assumes the stack grows from high to low. |
28 Thread* thread = Thread::Current(); | 28 Thread* thread = Thread::Current(); |
29 Isolate* isolate = thread->isolate(); | |
30 uword jumpbuf_addr = Isolate::GetCurrentStackPointer(); | 29 uword jumpbuf_addr = Isolate::GetCurrentStackPointer(); |
31 #if defined(USING_SIMULATOR) | 30 #if defined(USING_SIMULATOR) |
32 uword top_exit_frame_info = isolate->simulator()->top_exit_frame_info(); | 31 uword top_exit_frame_info = isolate->simulator()->top_exit_frame_info(); |
33 #else | 32 #else |
34 uword top_exit_frame_info = thread->top_exit_frame_info(); | 33 uword top_exit_frame_info = thread->top_exit_frame_info(); |
35 #endif | 34 #endif |
36 if (!isolate->MutatorThreadIsCurrentThread()) { | 35 if (!thread->IsMutatorThread()) { |
37 // A helper thread does not execute Dart code, so it's safe to jump. | 36 // A helper thread does not execute Dart code, so it's safe to jump. |
38 ASSERT(top_exit_frame_info == 0); | 37 ASSERT(top_exit_frame_info == 0); |
39 return true; | 38 return true; |
40 } | 39 } |
41 return ((top_exit_frame_info == 0) || (jumpbuf_addr < top_exit_frame_info)); | 40 return ((top_exit_frame_info == 0) || (jumpbuf_addr < top_exit_frame_info)); |
42 } | 41 } |
43 | 42 |
44 | 43 |
45 void LongJumpScope::Jump(int value, const Error& error) { | 44 void LongJumpScope::Jump(int value, const Error& error) { |
46 // A zero is the default return value from setting up a LongJumpScope | 45 // A zero is the default return value from setting up a LongJumpScope |
(...skipping 14 matching lines...) Expand all Loading... |
61 // Remember the error in the sticky error of this isolate. | 60 // Remember the error in the sticky error of this isolate. |
62 isolate->object_store()->set_sticky_error(error); | 61 isolate->object_store()->set_sticky_error(error); |
63 | 62 |
64 // Destruct all the active StackResource objects. | 63 // Destruct all the active StackResource objects. |
65 StackResource::UnwindAbove(thread, top_); | 64 StackResource::UnwindAbove(thread, top_); |
66 longjmp(environment_, value); | 65 longjmp(environment_, value); |
67 UNREACHABLE(); | 66 UNREACHABLE(); |
68 } | 67 } |
69 | 68 |
70 } // namespace dart | 69 } // namespace dart |
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