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" 32 #include "runtime-profiler.h" 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 inline const char* StateToString(StateTag state) { 43 switch (state) { 44 case JS: 45 return "JS"; 46 case GC: 47 return "GC"; 48 case COMPILER: 49 return "COMPILER"; 50 case OTHER: 51 return "OTHER"; 52 case EXTERNAL: 53 return "EXTERNAL"; 54 default: 55 UNREACHABLE(); 56 return NULL; 57 } 58 } 59 60 61 VMState::VMState(Isolate* isolate, StateTag tag) 62 : isolate_(isolate), previous_tag_(isolate->current_vm_state()) { 63 if (FLAG_log_state_changes) { 64 LOG(isolate, UncheckedStringEvent("Entering", StateToString(tag))); 65 LOG(isolate, UncheckedStringEvent("From", StateToString(previous_tag_))); 66 } 67 68 isolate_->SetCurrentVMState(tag); 69 } 70 71 72 VMState::~VMState() { 73 if (FLAG_log_state_changes) { 74 LOG(isolate_, 75 UncheckedStringEvent("Leaving", 76 StateToString(isolate_->current_vm_state()))); 77 LOG(isolate_, 78 UncheckedStringEvent("To", StateToString(previous_tag_))); 79 } 80 81 isolate_->SetCurrentVMState(previous_tag_); 82 } 83 84 85 ExternalCallbackScope::ExternalCallbackScope(Isolate* isolate, Address callback) 86 : isolate_(isolate), previous_callback_(isolate->external_callback()) { 87 isolate_->set_external_callback(callback); 88 } 89 90 ExternalCallbackScope::~ExternalCallbackScope() { 91 isolate_->set_external_callback(previous_callback_); 92 } 93 94 95 } } // namespace v8::internal 96 97 #endif // V8_VM_STATE_INL_H_ 98