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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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