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 34namespace v8 { 35namespace 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// 42inline 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 61VMState::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 72VMState::~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 85ExternalCallbackScope::ExternalCallbackScope(Isolate* isolate, Address callback) 86 : isolate_(isolate), previous_callback_(isolate->external_callback()) { 87 isolate_->set_external_callback(callback); 88} 89 90ExternalCallbackScope::~ExternalCallbackScope() { 91 isolate_->set_external_callback(previous_callback_); 92} 93 94 95} } // namespace v8::internal 96 97#endif // V8_VM_STATE_INL_H_ 98