src/v8/src/v8.cc

   1 // Copyright 2012 the V8 project authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "src/v8.h"
   6
   7 #include "src/assembler.h"
   8 #include "src/base/once.h"
   9 #include "src/base/platform/platform.h"
  10 #include "src/bootstrapper.h"
  11 #include "src/compiler/pipeline.h"
  12 #include "src/debug.h"
  13 #include "src/deoptimizer.h"
  14 #include "src/elements.h"
  15 #include "src/frames.h"
  16 #include "src/heap/store-buffer.h"
  17 #include "src/heap-profiler.h"
  18 #include "src/hydrogen.h"
  19 #include "src/isolate.h"
  20 #include "src/lithium-allocator.h"
  21 #include "src/objects.h"
  22 #include "src/runtime-profiler.h"
  23 #include "src/sampler.h"
  24 #include "src/serialize.h"
  25
  26
  27 namespace v8 {
  28 namespace internal {
  29
  30 V8_DECLARE_ONCE(init_once);
  31
  32 v8::ArrayBuffer::Allocator* V8::array_buffer_allocator_ = NULL;
  33 v8::Platform* V8::platform_ = NULL;
  34
  35
  36 bool V8::Initialize(Deserializer* des) {
  37   InitializeOncePerProcess();
  38   Isolate* isolate = Isolate::UncheckedCurrent();
  39   if (isolate == NULL) return true;
  40   if (isolate->IsDead()) return false;
  41   if (isolate->IsInitialized()) return true;
  42
  43   return isolate->Init(des);
  44 }
  45
  46
  47 void V8::TearDown() {
  48   Bootstrapper::TearDownExtensions();
  49   ElementsAccessor::TearDown();
  50   LOperand::TearDownCaches();
  51   compiler::Pipeline::TearDown();
  52   ExternalReference::TearDownMathExpData();
  53   RegisteredExtension::UnregisterAll();
  54   Isolate::GlobalTearDown();
  55
  56   Sampler::TearDown();
  57 }
  58
  59
  60 void V8::SetReturnAddressLocationResolver(
  61       ReturnAddressLocationResolver resolver) {
  62   StackFrame::SetReturnAddressLocationResolver(resolver);
  63 }
  64
  65
  66 void V8::InitializeOncePerProcessImpl() {
  67   FlagList::EnforceFlagImplications();
  68
  69   if (FLAG_predictable && FLAG_random_seed == 0) {
  70     // Avoid random seeds in predictable mode.
  71     FLAG_random_seed = 12347;
  72   }
  73
  74   if (FLAG_stress_compaction) {
  75     FLAG_force_marking_deque_overflows = true;
  76     FLAG_gc_global = true;
  77     FLAG_max_semi_space_size = 1;
  78   }
  79
  80   base::OS::Initialize(FLAG_random_seed, FLAG_hard_abort, FLAG_gc_fake_mmap);
  81
  82   Sampler::SetUp();
  83   CpuFeatures::Probe(false);
  84   init_memcopy_functions();
  85   // The custom exp implementation needs 16KB of lookup data; initialize it
  86   // on demand.
  87   init_fast_sqrt_function();
  88 #ifdef _WIN64
  89   init_modulo_function();
  90 #endif
  91   ElementsAccessor::InitializeOncePerProcess();
  92   LOperand::SetUpCaches();
  93   compiler::Pipeline::SetUp();
  94   SetUpJSCallerSavedCodeData();
  95   ExternalReference::SetUp();
  96   Bootstrapper::InitializeOncePerProcess();
  97 }
  98
  99
 100 void V8::InitializeOncePerProcess() {
 101   base::CallOnce(&init_once, &InitializeOncePerProcessImpl);
 102 }
 103
 104
 105 void V8::InitializePlatform(v8::Platform* platform) {
 106   CHECK(!platform_);
 107   CHECK(platform);
 108   platform_ = platform;
 109 }
 110
 111
 112 void V8::ShutdownPlatform() {
 113   CHECK(platform_);
 114   platform_ = NULL;
 115 }
 116
 117
 118 v8::Platform* V8::GetCurrentPlatform() {
 119   DCHECK(platform_);
 120   return platform_;
 121 }
 122
 123 } }  // namespace v8::internal