| // Copyright 2006-2009 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "v8.h" |
| |
| #include "bootstrapper.h" |
| #include "debug.h" |
| #include "serialize.h" |
| #include "stub-cache.h" |
| #include "oprofile-agent.h" |
| |
| #if V8_TARGET_ARCH_ARM |
| #include "arm/simulator-arm.h" |
| #endif |
| |
| namespace v8 { |
| namespace internal { |
| |
| bool V8::is_running_ = false; |
| bool V8::has_been_setup_ = false; |
| bool V8::has_been_disposed_ = false; |
| bool V8::has_fatal_error_ = false; |
| |
| bool V8::Initialize(Deserializer *des) { |
| bool create_heap_objects = des == NULL; |
| if (has_been_disposed_ || has_fatal_error_) return false; |
| if (IsRunning()) return true; |
| |
| is_running_ = true; |
| has_been_setup_ = true; |
| has_fatal_error_ = false; |
| has_been_disposed_ = false; |
| #ifdef DEBUG |
| // The initialization process does not handle memory exhaustion. |
| DisallowAllocationFailure disallow_allocation_failure; |
| #endif |
| |
| // Enable logging before setting up the heap |
| Logger::Setup(); |
| if (des) des->GetLog(); |
| |
| // Setup the platform OS support. |
| OS::Setup(); |
| |
| // Initialize other runtime facilities |
| #if !V8_HOST_ARCH_ARM && V8_TARGET_ARCH_ARM |
| ::assembler::arm::Simulator::Initialize(); |
| #endif |
| |
| // Setup the object heap |
| ASSERT(!Heap::HasBeenSetup()); |
| if (!Heap::Setup(create_heap_objects)) { |
| SetFatalError(); |
| return false; |
| } |
| |
| Bootstrapper::Initialize(create_heap_objects); |
| Builtins::Setup(create_heap_objects); |
| Top::Initialize(); |
| |
| if (FLAG_preemption) { |
| v8::Locker locker; |
| v8::Locker::StartPreemption(100); |
| } |
| |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| Debug::Setup(create_heap_objects); |
| #endif |
| StubCache::Initialize(create_heap_objects); |
| |
| // If we are deserializing, read the state into the now-empty heap. |
| if (des != NULL) { |
| des->Deserialize(); |
| StubCache::Clear(); |
| } |
| |
| // Deserializing may put strange things in the root array's copy of the |
| // stack guard. |
| Heap::SetStackLimit(StackGuard::jslimit()); |
| |
| // Setup the CPU support. Must be done after heap setup and after |
| // any deserialization because we have to have the initial heap |
| // objects in place for creating the code object used for probing. |
| CPU::Setup(); |
| |
| OProfileAgent::Initialize(); |
| |
| return true; |
| } |
| |
| |
| void V8::SetFatalError() { |
| is_running_ = false; |
| has_fatal_error_ = true; |
| } |
| |
| |
| void V8::TearDown() { |
| if (!has_been_setup_ || has_been_disposed_) return; |
| |
| OProfileAgent::TearDown(); |
| |
| if (FLAG_preemption) { |
| v8::Locker locker; |
| v8::Locker::StopPreemption(); |
| } |
| |
| Builtins::TearDown(); |
| Bootstrapper::TearDown(); |
| |
| Top::TearDown(); |
| |
| Heap::TearDown(); |
| Logger::TearDown(); |
| |
| is_running_ = false; |
| has_been_disposed_ = true; |
| } |
| |
| |
| uint32_t V8::Random() { |
| // Random number generator using George Marsaglia's MWC algorithm. |
| static uint32_t hi = 0; |
| static uint32_t lo = 0; |
| |
| // Initialize seed using the system random(). If one of the seeds |
| // should ever become zero again, or if random() returns zero, we |
| // avoid getting stuck with zero bits in hi or lo by re-initializing |
| // them on demand. |
| if (hi == 0) hi = random(); |
| if (lo == 0) lo = random(); |
| |
| // Mix the bits. |
| hi = 36969 * (hi & 0xFFFF) + (hi >> 16); |
| lo = 18273 * (lo & 0xFFFF) + (lo >> 16); |
| return (hi << 16) + (lo & 0xFFFF); |
| } |
| |
| |
| bool V8::IdleNotification(bool is_high_priority) { |
| if (!FLAG_use_idle_notification) return false; |
| // Ignore high priority instances of V8. |
| if (is_high_priority) return false; |
| |
| // Tell the heap that it may want to adjust. |
| return Heap::IdleNotification(); |
| } |
| |
| |
| Smi* V8::RandomPositiveSmi() { |
| uint32_t random = Random(); |
| ASSERT(IsPowerOf2(Smi::kMaxValue + 1)); |
| return Smi::FromInt(random & Smi::kMaxValue); |
| } |
| |
| } } // namespace v8::internal |