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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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51 return "OTHER"; | 51 return "OTHER"; |
52 default: | 52 default: |
53 UNREACHABLE(); | 53 UNREACHABLE(); |
54 return NULL; | 54 return NULL; |
55 } | 55 } |
56 } | 56 } |
57 | 57 |
58 VMState::VMState(StateTag state) | 58 VMState::VMState(StateTag state) |
59 : disabled_(true), | 59 : disabled_(true), |
60 state_(OTHER), | 60 state_(OTHER), |
61 external_callback_(NULL) { | 61 external_callback_(NULL), |
| 62 isolate_(Isolate::Current()) { |
62 #ifdef ENABLE_LOGGING_AND_PROFILING | 63 #ifdef ENABLE_LOGGING_AND_PROFILING |
63 if (!LOGGER->is_logging() && !CpuProfiler::is_profiling()) { | 64 if (!LOGGER->is_logging() && !CpuProfiler::is_profiling()) { |
64 return; | 65 return; |
65 } | 66 } |
66 #endif | 67 #endif |
67 | 68 |
68 disabled_ = false; | 69 disabled_ = false; |
69 #if !defined(ENABLE_HEAP_PROTECTION) | 70 #if !defined(ENABLE_HEAP_PROTECTION) |
70 // When not protecting the heap, there is no difference between | 71 // When not protecting the heap, there is no difference between |
71 // EXTERNAL and OTHER. As an optimization in that case, we will not | 72 // EXTERNAL and OTHER. As an optimization in that case, we will not |
72 // perform EXTERNAL->OTHER transitions through the API. We thus | 73 // perform EXTERNAL->OTHER transitions through the API. We thus |
73 // compress the two states into one. | 74 // compress the two states into one. |
74 if (state == EXTERNAL) state = OTHER; | 75 if (state == EXTERNAL) state = OTHER; |
75 #endif | 76 #endif |
76 state_ = state; | 77 state_ = state; |
77 previous_ = current_state_; // Save the previous state. | 78 previous_ = isolate_->vm_state(); // Save the previous state. |
78 current_state_ = this; // Install the new state. | 79 isolate_->set_vm_state(this); // Install the new state. |
79 | 80 |
80 #ifdef ENABLE_LOGGING_AND_PROFILING | 81 #ifdef ENABLE_LOGGING_AND_PROFILING |
81 if (FLAG_log_state_changes) { | 82 if (FLAG_log_state_changes) { |
82 LOG(UncheckedStringEvent("Entering", StateToString(state_))); | 83 LOG(UncheckedStringEvent("Entering", StateToString(state_))); |
83 if (previous_ != NULL) { | 84 if (previous_ != NULL) { |
84 LOG(UncheckedStringEvent("From", StateToString(previous_->state_))); | 85 LOG(UncheckedStringEvent("From", StateToString(previous_->state_))); |
85 } | 86 } |
86 } | 87 } |
87 #endif | 88 #endif |
88 | 89 |
89 #ifdef ENABLE_HEAP_PROTECTION | 90 #ifdef ENABLE_HEAP_PROTECTION |
90 if (FLAG_protect_heap) { | 91 if (FLAG_protect_heap) { |
91 if (state_ == EXTERNAL) { | 92 if (state_ == EXTERNAL) { |
92 // We are leaving V8. | 93 // We are leaving V8. |
93 ASSERT((previous_ != NULL) && (previous_->state_ != EXTERNAL)); | 94 ASSERT((previous_ != NULL) && (previous_->state_ != EXTERNAL)); |
94 Heap::Protect(); | 95 Heap::Protect(); |
95 } else if ((previous_ == NULL) || (previous_->state_ == EXTERNAL)) { | 96 } else if ((previous_ == NULL) || (previous_->state_ == EXTERNAL)) { |
96 // We are entering V8. | 97 // We are entering V8. |
97 Heap::Unprotect(); | 98 Heap::Unprotect(); |
98 } | 99 } |
99 } | 100 } |
100 #endif | 101 #endif |
101 } | 102 } |
102 | 103 |
103 | 104 |
104 VMState::~VMState() { | 105 VMState::~VMState() { |
| 106 ASSERT(isolate_ == Isolate::Current()); |
105 if (disabled_) return; | 107 if (disabled_) return; |
106 current_state_ = previous_; // Return to the previous state. | 108 isolate_->set_vm_state(previous_); // Return to the previous state. |
107 | 109 |
108 #ifdef ENABLE_LOGGING_AND_PROFILING | 110 #ifdef ENABLE_LOGGING_AND_PROFILING |
109 if (FLAG_log_state_changes) { | 111 if (FLAG_log_state_changes) { |
110 LOG(UncheckedStringEvent("Leaving", StateToString(state_))); | 112 LOG(UncheckedStringEvent("Leaving", StateToString(state_))); |
111 if (previous_ != NULL) { | 113 if (previous_ != NULL) { |
112 LOG(UncheckedStringEvent("To", StateToString(previous_->state_))); | 114 LOG(UncheckedStringEvent("To", StateToString(previous_->state_))); |
113 } | 115 } |
114 } | 116 } |
115 #endif // ENABLE_LOGGING_AND_PROFILING | 117 #endif // ENABLE_LOGGING_AND_PROFILING |
116 | 118 |
117 #ifdef ENABLE_HEAP_PROTECTION | 119 #ifdef ENABLE_HEAP_PROTECTION |
118 if (FLAG_protect_heap) { | 120 if (FLAG_protect_heap) { |
119 if (state_ == EXTERNAL) { | 121 if (state_ == EXTERNAL) { |
120 // We are reentering V8. | 122 // We are reentering V8. |
121 ASSERT((previous_ != NULL) && (previous_->state_ != EXTERNAL)); | 123 ASSERT((previous_ != NULL) && (previous_->state_ != EXTERNAL)); |
122 Heap::Unprotect(); | 124 Heap::Unprotect(); |
123 } else if ((previous_ == NULL) || (previous_->state_ == EXTERNAL)) { | 125 } else if ((previous_ == NULL) || (previous_->state_ == EXTERNAL)) { |
124 // We are leaving V8. | 126 // We are leaving V8. |
125 Heap::Protect(); | 127 Heap::Protect(); |
126 } | 128 } |
127 } | 129 } |
128 #endif // ENABLE_HEAP_PROTECTION | 130 #endif // ENABLE_HEAP_PROTECTION |
129 } | 131 } |
130 #endif // ENABLE_VMSTATE_TRACKING | 132 #endif // ENABLE_VMSTATE_TRACKING |
131 | 133 |
132 } } // namespace v8::internal | 134 } } // namespace v8::internal |
133 | 135 |
134 #endif // V8_VM_STATE_INL_H_ | 136 #endif // V8_VM_STATE_INL_H_ |
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