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
27namespace v8 {
28namespace internal {
29
30V8_DECLARE_ONCE(init_once);
31
32v8::ArrayBuffer::Allocator* V8::array_buffer_allocator_ = NULL;
33v8::Platform* V8::platform_ = NULL;
34
35
36bool V8::Initialize() {
37  InitializeOncePerProcess();
38  return true;
39}
40
41
42void V8::TearDown() {
43  Bootstrapper::TearDownExtensions();
44  ElementsAccessor::TearDown();
45  LOperand::TearDownCaches();
46  compiler::Pipeline::TearDown();
47  ExternalReference::TearDownMathExpData();
48  RegisteredExtension::UnregisterAll();
49  Isolate::GlobalTearDown();
50  Sampler::TearDown();
51  FlagList::ResetAllFlags();  // Frees memory held by string arguments.
52}
53
54
55void V8::SetReturnAddressLocationResolver(
56      ReturnAddressLocationResolver resolver) {
57  StackFrame::SetReturnAddressLocationResolver(resolver);
58}
59
60
61void V8::InitializeOncePerProcessImpl() {
62  FlagList::EnforceFlagImplications();
63
64  if (FLAG_predictable && FLAG_random_seed == 0) {
65    // Avoid random seeds in predictable mode.
66    FLAG_random_seed = 12347;
67  }
68
69  if (FLAG_stress_compaction) {
70    FLAG_force_marking_deque_overflows = true;
71    FLAG_gc_global = true;
72    FLAG_max_semi_space_size = 1;
73  }
74
75  base::OS::Initialize(FLAG_random_seed, FLAG_hard_abort, FLAG_gc_fake_mmap);
76
77  Isolate::InitializeOncePerProcess();
78
79  Sampler::SetUp();
80  CpuFeatures::Probe(false);
81  init_memcopy_functions();
82  // The custom exp implementation needs 16KB of lookup data; initialize it
83  // on demand.
84  init_fast_sqrt_function();
85#ifdef _WIN64
86  init_modulo_function();
87#endif
88  ElementsAccessor::InitializeOncePerProcess();
89  LOperand::SetUpCaches();
90  compiler::Pipeline::SetUp();
91  SetUpJSCallerSavedCodeData();
92  ExternalReference::SetUp();
93  Bootstrapper::InitializeOncePerProcess();
94}
95
96
97void V8::InitializeOncePerProcess() {
98  base::CallOnce(&init_once, &InitializeOncePerProcessImpl);
99}
100
101
102void V8::InitializePlatform(v8::Platform* platform) {
103  CHECK(!platform_);
104  CHECK(platform);
105  platform_ = platform;
106}
107
108
109void V8::ShutdownPlatform() {
110  CHECK(platform_);
111  platform_ = NULL;
112}
113
114
115v8::Platform* V8::GetCurrentPlatform() {
116  DCHECK(platform_);
117  return platform_;
118}
119
120} }  // namespace v8::internal
121