Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1 | // Copyright 2010 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 28 | #ifndef V8_VM_STATE_H_ |
| 29 | #define V8_VM_STATE_H_ |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 30 | |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame^] | 31 | #include "top.h" |
| 32 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 33 | namespace v8 { |
| 34 | namespace internal { |
| 35 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 36 | class VMState BASE_EMBEDDED { |
| 37 | #ifdef ENABLE_VMSTATE_TRACKING |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 38 | public: |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 39 | inline VMState(StateTag state); |
| 40 | inline ~VMState(); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 41 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 42 | StateTag state() { return state_; } |
| 43 | void set_external_callback(Address external_callback) { |
| 44 | external_callback_ = external_callback; |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 45 | } |
| 46 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 47 | // Used for debug asserts. |
| 48 | static bool is_outermost_external() { |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame^] | 49 | return Top::current_vm_state() == 0; |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 50 | } |
| 51 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 52 | static StateTag current_state() { |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame^] | 53 | VMState* state = Top::current_vm_state(); |
Ben Murdoch | 3bec4d2 | 2010-07-22 14:51:16 +0100 | [diff] [blame] | 54 | return state ? state->state() : EXTERNAL; |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 55 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 56 | |
| 57 | static Address external_callback() { |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame^] | 58 | VMState* state = Top::current_vm_state(); |
Ben Murdoch | 3bec4d2 | 2010-07-22 14:51:16 +0100 | [diff] [blame] | 59 | return state ? state->external_callback_ : NULL; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 60 | } |
| 61 | |
| 62 | private: |
| 63 | bool disabled_; |
| 64 | StateTag state_; |
| 65 | VMState* previous_; |
| 66 | Address external_callback_; |
| 67 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 68 | #else |
| 69 | public: |
| 70 | explicit VMState(StateTag state) {} |
| 71 | #endif |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 72 | }; |
| 73 | |
| 74 | } } // namespace v8::internal |
| 75 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 76 | |
| 77 | #endif // V8_VM_STATE_H_ |