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/crankshaft/lithium-allocator.h"
12#include "src/debug/debug.h"
13#include "src/deoptimizer.h"
14#include "src/elements.h"
15#include "src/frames.h"
16#include "src/isolate.h"
17#include "src/libsampler/v8-sampler.h"
18#include "src/objects.h"
19#include "src/profiler/heap-profiler.h"
20#include "src/runtime-profiler.h"
21#include "src/snapshot/natives.h"
22#include "src/snapshot/snapshot.h"
23
24
25namespace v8 {
26namespace internal {
27
28V8_DECLARE_ONCE(init_once);
29
30#ifdef V8_USE_EXTERNAL_STARTUP_DATA
31V8_DECLARE_ONCE(init_natives_once);
32V8_DECLARE_ONCE(init_snapshot_once);
33#endif
34
35v8::Platform* V8::platform_ = NULL;
36
37
38bool V8::Initialize() {
39  InitializeOncePerProcess();
40  return true;
41}
42
43
44void V8::TearDown() {
45  Bootstrapper::TearDownExtensions();
46  ElementsAccessor::TearDown();
47  LOperand::TearDownCaches();
48  RegisteredExtension::UnregisterAll();
49  Isolate::GlobalTearDown();
50  sampler::Sampler::TearDown();
51  FlagList::ResetAllFlags();  // Frees memory held by string arguments.
52}
53
54
55void V8::InitializeOncePerProcessImpl() {
56  FlagList::EnforceFlagImplications();
57
58  if (FLAG_predictable && FLAG_random_seed == 0) {
59    // Avoid random seeds in predictable mode.
60    FLAG_random_seed = 12347;
61  }
62
63  if (FLAG_stress_compaction) {
64    FLAG_force_marking_deque_overflows = true;
65    FLAG_gc_global = true;
66    FLAG_max_semi_space_size = 1;
67  }
68
69  if (FLAG_turbo && strcmp(FLAG_turbo_filter, "~~") == 0) {
70    const char* filter_flag = "--turbo-filter=*";
71    FlagList::SetFlagsFromString(filter_flag, StrLength(filter_flag));
72  }
73
74  base::OS::Initialize(FLAG_random_seed, FLAG_hard_abort, FLAG_gc_fake_mmap);
75
76  Isolate::InitializeOncePerProcess();
77
78  sampler::Sampler::SetUp();
79  CpuFeatures::Probe(false);
80  ElementsAccessor::InitializeOncePerProcess();
81  LOperand::SetUpCaches();
82  SetUpJSCallerSavedCodeData();
83  ExternalReference::SetUp();
84  Bootstrapper::InitializeOncePerProcess();
85}
86
87
88void V8::InitializeOncePerProcess() {
89  base::CallOnce(&init_once, &InitializeOncePerProcessImpl);
90}
91
92
93void V8::InitializePlatform(v8::Platform* platform) {
94  CHECK(!platform_);
95  CHECK(platform);
96  platform_ = platform;
97}
98
99
100void V8::ShutdownPlatform() {
101  CHECK(platform_);
102  platform_ = NULL;
103}
104
105
106v8::Platform* V8::GetCurrentPlatform() {
107  DCHECK(platform_);
108  return platform_;
109}
110
111
112void V8::SetPlatformForTesting(v8::Platform* platform) { platform_ = platform; }
113
114
115void V8::SetNativesBlob(StartupData* natives_blob) {
116#ifdef V8_USE_EXTERNAL_STARTUP_DATA
117  base::CallOnce(&init_natives_once, &SetNativesFromFile, natives_blob);
118#else
119  CHECK(false);
120#endif
121}
122
123
124void V8::SetSnapshotBlob(StartupData* snapshot_blob) {
125#ifdef V8_USE_EXTERNAL_STARTUP_DATA
126  base::CallOnce(&init_snapshot_once, &SetSnapshotFromFile, snapshot_blob);
127#else
128  CHECK(false);
129#endif
130}
131}  // namespace internal
132}  // namespace v8
133