src/v8.cc
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00001 // Copyright 2006-2008 the V8 project authors. All rights reserved. 00002 // Redistribution and use in source and binary forms, with or without 00003 // modification, are permitted provided that the following conditions are 00004 // met: 00005 // 00006 // * Redistributions of source code must retain the above copyright 00007 // notice, this list of conditions and the following disclaimer. 00008 // * Redistributions in binary form must reproduce the above 00009 // copyright notice, this list of conditions and the following 00010 // disclaimer in the documentation and/or other materials provided 00011 // with the distribution. 00012 // * Neither the name of Google Inc. nor the names of its 00013 // contributors may be used to endorse or promote products derived 00014 // from this software without specific prior written permission. 00015 // 00016 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00017 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00018 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 00019 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 00020 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00021 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00022 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00023 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00024 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00025 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00026 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00027 00028 #include "v8.h" 00029 00030 #include "bootstrapper.h" 00031 #include "debug.h" 00032 #include "serialize.h" 00033 #include "stub-cache.h" 00034 00035 namespace v8 { namespace internal { 00036 00037 bool V8::has_been_setup_ = false; 00038 bool V8::has_been_disposed_ = false; 00039 00040 bool V8::Initialize(Deserializer *des) { 00041 bool create_heap_objects = des == NULL; 00042 if (HasBeenDisposed()) return false; 00043 if (HasBeenSetup()) return true; 00044 has_been_setup_ = true; 00045 #ifdef DEBUG 00046 // The initialization process does not handle memory exhaustion. 00047 DisallowAllocationFailure disallow_allocation_failure; 00048 #endif 00049 00050 // Enable logging before setting up the heap 00051 Logger::Setup(); 00052 if (des) des->GetLog(); 00053 00054 // Setup the CPU support. 00055 CPU::Setup(); 00056 00057 // Setup the platform OS support. 00058 OS::Setup(); 00059 00060 // Setup the object heap 00061 ASSERT(!Heap::HasBeenSetup()); 00062 if (!Heap::Setup(create_heap_objects)) { 00063 has_been_setup_ = false; 00064 return false; 00065 } 00066 00067 // Initialize other runtime facilities 00068 Bootstrapper::Initialize(create_heap_objects); 00069 Builtins::Setup(create_heap_objects); 00070 Top::Initialize(); 00071 00072 if (FLAG_preemption) { 00073 v8::Locker locker; 00074 v8::Locker::StartPreemption(100); 00075 } 00076 00077 Debug::Setup(create_heap_objects); 00078 StubCache::Initialize(create_heap_objects); 00079 00080 // If we are deserializing, read the state into the now-empty heap. 00081 if (des != NULL) { 00082 des->Deserialize(); 00083 StubCache::Clear(); 00084 } 00085 00086 return true; 00087 } 00088 00089 00090 void V8::TearDown() { 00091 if (HasBeenDisposed()) return; 00092 if (!HasBeenSetup()) return; 00093 00094 if (FLAG_preemption) { 00095 v8::Locker locker; 00096 v8::Locker::StopPreemption(); 00097 } 00098 00099 Builtins::TearDown(); 00100 Bootstrapper::TearDown(); 00101 00102 Top::TearDown(); 00103 00104 Heap::TearDown(); 00105 Logger::TearDown(); 00106 00107 has_been_setup_ = false; 00108 has_been_disposed_ = true; 00109 } 00110 00111 } } // namespace v8::internal
