Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [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 |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_VM_STATE_INL_H_ |
| 29 | #define V8_VM_STATE_INL_H_ |
| 30 | |
| 31 | #include "vm-state.h" |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 32 | #include "runtime-profiler.h" |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 33 | |
| 34 | namespace v8 { |
| 35 | namespace internal { |
| 36 | |
| 37 | // |
| 38 | // VMState class implementation. A simple stack of VM states held by the |
| 39 | // logger and partially threaded through the call stack. States are pushed by |
| 40 | // VMState construction and popped by destruction. |
| 41 | // |
| 42 | #ifdef ENABLE_VMSTATE_TRACKING |
| 43 | inline const char* StateToString(StateTag state) { |
| 44 | switch (state) { |
| 45 | case JS: |
| 46 | return "JS"; |
| 47 | case GC: |
| 48 | return "GC"; |
| 49 | case COMPILER: |
| 50 | return "COMPILER"; |
| 51 | case OTHER: |
| 52 | return "OTHER"; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 53 | case EXTERNAL: |
| 54 | return "EXTERNAL"; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 55 | default: |
| 56 | UNREACHABLE(); |
| 57 | return NULL; |
| 58 | } |
| 59 | } |
| 60 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 61 | |
| 62 | VMState::VMState(Isolate* isolate, StateTag tag) |
| 63 | : isolate_(isolate), previous_tag_(isolate->current_vm_state()) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 64 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 65 | if (FLAG_log_state_changes) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 66 | LOG(isolate, UncheckedStringEvent("Entering", StateToString(tag))); |
| 67 | LOG(isolate, UncheckedStringEvent("From", StateToString(previous_tag_))); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 68 | } |
| 69 | #endif |
| 70 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 71 | isolate_->SetCurrentVMState(tag); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 72 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 73 | #ifdef ENABLE_HEAP_PROTECTION |
| 74 | if (FLAG_protect_heap) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 75 | if (tag == EXTERNAL) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 76 | // We are leaving V8. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 77 | ASSERT(previous_tag_ != EXTERNAL); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 78 | isolate_->heap()->Protect(); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 79 | } else if (previous_tag_ = EXTERNAL) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 80 | // We are entering V8. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 81 | isolate_->heap()->Unprotect(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 82 | } |
| 83 | } |
| 84 | #endif |
| 85 | } |
| 86 | |
| 87 | |
| 88 | VMState::~VMState() { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 89 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 90 | if (FLAG_log_state_changes) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 91 | LOG(isolate_, |
| 92 | UncheckedStringEvent("Leaving", |
| 93 | StateToString(isolate_->current_vm_state()))); |
| 94 | LOG(isolate_, |
| 95 | UncheckedStringEvent("To", StateToString(previous_tag_))); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 96 | } |
| 97 | #endif // ENABLE_LOGGING_AND_PROFILING |
| 98 | |
| 99 | #ifdef ENABLE_HEAP_PROTECTION |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 100 | StateTag tag = isolate_->current_vm_state(); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 101 | #endif |
| 102 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 103 | isolate_->SetCurrentVMState(previous_tag_); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 104 | |
| 105 | #ifdef ENABLE_HEAP_PROTECTION |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 106 | if (FLAG_protect_heap) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 107 | if (tag == EXTERNAL) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 108 | // We are reentering V8. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 109 | ASSERT(previous_tag_ != EXTERNAL); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 110 | isolate_->heap()->Unprotect(); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 111 | } else if (previous_tag_ == EXTERNAL) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 112 | // We are leaving V8. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 113 | isolate_->heap()->Protect(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 114 | } |
| 115 | } |
| 116 | #endif // ENABLE_HEAP_PROTECTION |
| 117 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 118 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 119 | #endif // ENABLE_VMSTATE_TRACKING |
| 120 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 121 | |
| 122 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 123 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 124 | ExternalCallbackScope::ExternalCallbackScope(Isolate* isolate, Address callback) |
| 125 | : isolate_(isolate), previous_callback_(isolate->external_callback()) { |
| 126 | isolate_->set_external_callback(callback); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | ExternalCallbackScope::~ExternalCallbackScope() { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame^] | 130 | isolate_->set_external_callback(previous_callback_); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | #endif // ENABLE_LOGGING_AND_PROFILING |
| 134 | |
| 135 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 136 | } } // namespace v8::internal |
| 137 | |
| 138 | #endif // V8_VM_STATE_INL_H_ |