| // Copyright 2010 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef V8_VM_STATE_H_ |
| #define V8_VM_STATE_H_ |
| |
| namespace v8 { |
| namespace internal { |
| |
| class VMState BASE_EMBEDDED { |
| #ifdef ENABLE_VMSTATE_TRACKING |
| public: |
| inline VMState(StateTag state); |
| inline ~VMState(); |
| |
| StateTag state() { return state_; } |
| void set_external_callback(Address external_callback) { |
| external_callback_ = external_callback; |
| } |
| |
| // Used for debug asserts. |
| static bool is_outermost_external() { |
| return current_state_ == NULL; |
| } |
| |
| static StateTag current_state() { |
| return current_state_ ? current_state_->state() : EXTERNAL; |
| } |
| |
| static Address external_callback() { |
| return current_state_ ? current_state_->external_callback_ : NULL; |
| } |
| |
| private: |
| bool disabled_; |
| StateTag state_; |
| VMState* previous_; |
| Address external_callback_; |
| |
| // A stack of VM states. |
| static VMState* current_state_; |
| #else |
| public: |
| explicit VMState(StateTag state) {} |
| #endif |
| }; |
| |
| } } // namespace v8::internal |
| |
| |
| #endif // V8_VM_STATE_H_ |