1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
4 // met:
5 //
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28 #include "v8.h"
29
30 #include "assembler.h"
31 #include "isolate.h"
32 #include "elements.h"
33 #include "bootstrapper.h"
34 #include "debug.h"
35 #ifdef V8_USE_DEFAULT_PLATFORM
36 #include "default-platform.h"
37 #endif
38 #include "deoptimizer.h"
39 #include "frames.h"
40 #include "heap-profiler.h"
41 #include "hydrogen.h"
42 #include "lithium-allocator.h"
43 #include "objects.h"
44 #include "once.h"
45 #include "platform.h"
46 #include "sampler.h"
47 #include "runtime-profiler.h"
48 #include "serialize.h"
49 #include "store-buffer.h"
50
51 namespace v8 {
52 namespace internal {
53
54 V8_DECLARE_ONCE(init_once);
55
56 List<CallCompletedCallback>* V8::call_completed_callbacks_ = NULL;
57 v8::ArrayBuffer::Allocator* V8::array_buffer_allocator_ = NULL;
58 v8::Platform* V8::platform_ = NULL;
59
60
Initialize(Deserializer * des)61 bool V8::Initialize(Deserializer* des) {
62 InitializeOncePerProcess();
63
64 // The current thread may not yet had entered an isolate to run.
65 // Note the Isolate::Current() may be non-null because for various
66 // initialization purposes an initializing thread may be assigned an isolate
67 // but not actually enter it.
68 if (i::Isolate::CurrentPerIsolateThreadData() == NULL) {
69 i::Isolate::EnterDefaultIsolate();
70 }
71
72 ASSERT(i::Isolate::CurrentPerIsolateThreadData() != NULL);
73 ASSERT(i::Isolate::CurrentPerIsolateThreadData()->thread_id().Equals(
74 i::ThreadId::Current()));
75 ASSERT(i::Isolate::CurrentPerIsolateThreadData()->isolate() ==
76 i::Isolate::Current());
77
78 Isolate* isolate = Isolate::Current();
79 if (isolate->IsDead()) return false;
80 if (isolate->IsInitialized()) return true;
81
82 return isolate->Init(des);
83 }
84
85
TearDown()86 void V8::TearDown() {
87 Isolate* isolate = Isolate::Current();
88 ASSERT(isolate->IsDefaultIsolate());
89 if (!isolate->IsInitialized()) return;
90
91 // The isolate has to be torn down before clearing the LOperand
92 // caches so that the optimizing compiler thread (if running)
93 // doesn't see an inconsistent view of the lithium instructions.
94 isolate->TearDown();
95 delete isolate;
96
97 ElementsAccessor::TearDown();
98 LOperand::TearDownCaches();
99 ExternalReference::TearDownMathExpData();
100 RegisteredExtension::UnregisterAll();
101 Isolate::GlobalTearDown();
102
103 delete call_completed_callbacks_;
104 call_completed_callbacks_ = NULL;
105
106 Sampler::TearDown();
107
108 #ifdef V8_USE_DEFAULT_PLATFORM
109 DefaultPlatform* platform = static_cast<DefaultPlatform*>(platform_);
110 platform_ = NULL;
111 delete platform;
112 #endif
113 }
114
115
SetReturnAddressLocationResolver(ReturnAddressLocationResolver resolver)116 void V8::SetReturnAddressLocationResolver(
117 ReturnAddressLocationResolver resolver) {
118 StackFrame::SetReturnAddressLocationResolver(resolver);
119 }
120
121
AddCallCompletedCallback(CallCompletedCallback callback)122 void V8::AddCallCompletedCallback(CallCompletedCallback callback) {
123 if (call_completed_callbacks_ == NULL) { // Lazy init.
124 call_completed_callbacks_ = new List<CallCompletedCallback>();
125 }
126 for (int i = 0; i < call_completed_callbacks_->length(); i++) {
127 if (callback == call_completed_callbacks_->at(i)) return;
128 }
129 call_completed_callbacks_->Add(callback);
130 }
131
132
RemoveCallCompletedCallback(CallCompletedCallback callback)133 void V8::RemoveCallCompletedCallback(CallCompletedCallback callback) {
134 if (call_completed_callbacks_ == NULL) return;
135 for (int i = 0; i < call_completed_callbacks_->length(); i++) {
136 if (callback == call_completed_callbacks_->at(i)) {
137 call_completed_callbacks_->Remove(i);
138 }
139 }
140 }
141
142
FireCallCompletedCallback(Isolate * isolate)143 void V8::FireCallCompletedCallback(Isolate* isolate) {
144 bool has_call_completed_callbacks = call_completed_callbacks_ != NULL;
145 bool microtask_pending = isolate->microtask_pending();
146 if (!has_call_completed_callbacks && !microtask_pending) return;
147
148 HandleScopeImplementer* handle_scope_implementer =
149 isolate->handle_scope_implementer();
150 if (!handle_scope_implementer->CallDepthIsZero()) return;
151 // Fire callbacks. Increase call depth to prevent recursive callbacks.
152 handle_scope_implementer->IncrementCallDepth();
153 if (microtask_pending) Execution::RunMicrotasks(isolate);
154 if (has_call_completed_callbacks) {
155 for (int i = 0; i < call_completed_callbacks_->length(); i++) {
156 call_completed_callbacks_->at(i)();
157 }
158 }
159 handle_scope_implementer->DecrementCallDepth();
160 }
161
162
InitializeOncePerProcessImpl()163 void V8::InitializeOncePerProcessImpl() {
164 FlagList::EnforceFlagImplications();
165 if (FLAG_stress_compaction) {
166 FLAG_force_marking_deque_overflows = true;
167 FLAG_gc_global = true;
168 FLAG_max_new_space_size = (1 << (kPageSizeBits - 10)) * 2;
169 }
170
171 #ifdef V8_USE_DEFAULT_PLATFORM
172 platform_ = new DefaultPlatform;
173 #endif
174 Sampler::SetUp();
175 CPU::SetUp();
176 OS::PostSetUp();
177 ElementsAccessor::InitializeOncePerProcess();
178 LOperand::SetUpCaches();
179 SetUpJSCallerSavedCodeData();
180 ExternalReference::SetUp();
181 Bootstrapper::InitializeOncePerProcess();
182 }
183
184
InitializeOncePerProcess()185 void V8::InitializeOncePerProcess() {
186 CallOnce(&init_once, &InitializeOncePerProcessImpl);
187 }
188
189
InitializePlatform(v8::Platform * platform)190 void V8::InitializePlatform(v8::Platform* platform) {
191 ASSERT(!platform_);
192 ASSERT(platform);
193 platform_ = platform;
194 }
195
196
ShutdownPlatform()197 void V8::ShutdownPlatform() {
198 ASSERT(platform_);
199 platform_ = NULL;
200 }
201
202
GetCurrentPlatform()203 v8::Platform* V8::GetCurrentPlatform() {
204 ASSERT(platform_);
205 return platform_;
206 }
207
208 } } // namespace v8::internal
209