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// Copyright 2012 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 "assembler.h"
#include "isolate.h"
#include "elements.h"
#include "bootstrapper.h"
#include "debug.h"
#include "deoptimizer.h"
#include "frames.h"
#include "heap-profiler.h"
#include "hydrogen.h"
#ifdef V8_USE_DEFAULT_PLATFORM
#include "libplatform/default-platform.h"
#endif
#include "lithium-allocator.h"
#include "objects.h"
#include "once.h"
#include "platform.h"
#include "sampler.h"
#include "runtime-profiler.h"
#include "serialize.h"
#include "store-buffer.h"
namespace v8 {
namespace internal {
V8_DECLARE_ONCE(init_once);
List<CallCompletedCallback>* V8::call_completed_callbacks_ = NULL;
v8::ArrayBuffer::Allocator* V8::array_buffer_allocator_ = NULL;
v8::Platform* V8::platform_ = NULL;
bool V8::Initialize(Deserializer* des) {
InitializeOncePerProcess();
// The current thread may not yet had entered an isolate to run.
// Note the Isolate::Current() may be non-null because for various
// initialization purposes an initializing thread may be assigned an isolate
// but not actually enter it.
if (i::Isolate::CurrentPerIsolateThreadData() == NULL) {
i::Isolate::EnterDefaultIsolate();
}
ASSERT(i::Isolate::CurrentPerIsolateThreadData() != NULL);
ASSERT(i::Isolate::CurrentPerIsolateThreadData()->thread_id().Equals(
i::ThreadId::Current()));
ASSERT(i::Isolate::CurrentPerIsolateThreadData()->isolate() ==
i::Isolate::Current());
Isolate* isolate = Isolate::Current();
if (isolate->IsDead()) return false;
if (isolate->IsInitialized()) return true;
#ifdef V8_USE_DEFAULT_PLATFORM
DefaultPlatform* platform = static_cast<DefaultPlatform*>(platform_);
platform->SetThreadPoolSize(isolate->max_available_threads());
// We currently only start the threads early, if we know that we'll use them.
if (FLAG_job_based_sweeping) platform->EnsureInitialized();
#endif
return isolate->Init(des);
}
void V8::TearDown() {
Isolate* isolate = Isolate::Current();
ASSERT(isolate->IsDefaultIsolate());
if (!isolate->IsInitialized()) return;
// The isolate has to be torn down before clearing the LOperand
// caches so that the optimizing compiler thread (if running)
// doesn't see an inconsistent view of the lithium instructions.
isolate->TearDown();
delete isolate;
Bootstrapper::TearDownExtensions();
ElementsAccessor::TearDown();
LOperand::TearDownCaches();
ExternalReference::TearDownMathExpData();
RegisteredExtension::UnregisterAll();
Isolate::GlobalTearDown();
delete call_completed_callbacks_;
call_completed_callbacks_ = NULL;
Sampler::TearDown();
#ifdef V8_USE_DEFAULT_PLATFORM
DefaultPlatform* platform = static_cast<DefaultPlatform*>(platform_);
platform_ = NULL;
delete platform;
#endif
}
void V8::SetReturnAddressLocationResolver(
ReturnAddressLocationResolver resolver) {
StackFrame::SetReturnAddressLocationResolver(resolver);
}
void V8::AddCallCompletedCallback(CallCompletedCallback callback) {
if (call_completed_callbacks_ == NULL) { // Lazy init.
call_completed_callbacks_ = new List<CallCompletedCallback>();
}
for (int i = 0; i < call_completed_callbacks_->length(); i++) {
if (callback == call_completed_callbacks_->at(i)) return;
}
call_completed_callbacks_->Add(callback);
}
void V8::RemoveCallCompletedCallback(CallCompletedCallback callback) {
if (call_completed_callbacks_ == NULL) return;
for (int i = 0; i < call_completed_callbacks_->length(); i++) {
if (callback == call_completed_callbacks_->at(i)) {
call_completed_callbacks_->Remove(i);
}
}
}
void V8::FireCallCompletedCallback(Isolate* isolate) {
bool has_call_completed_callbacks = call_completed_callbacks_ != NULL;
bool run_microtasks = isolate->autorun_microtasks() &&
isolate->microtask_pending();
if (!has_call_completed_callbacks && !run_microtasks) return;
HandleScopeImplementer* handle_scope_implementer =
isolate->handle_scope_implementer();
if (!handle_scope_implementer->CallDepthIsZero()) return;
// Fire callbacks. Increase call depth to prevent recursive callbacks.
handle_scope_implementer->IncrementCallDepth();
if (run_microtasks) Execution::RunMicrotasks(isolate);
if (has_call_completed_callbacks) {
for (int i = 0; i < call_completed_callbacks_->length(); i++) {
call_completed_callbacks_->at(i)();
}
}
handle_scope_implementer->DecrementCallDepth();
}
void V8::RunMicrotasks(Isolate* isolate) {
if (!isolate->microtask_pending())
return;
HandleScopeImplementer* handle_scope_implementer =
isolate->handle_scope_implementer();
ASSERT(handle_scope_implementer->CallDepthIsZero());
// Increase call depth to prevent recursive callbacks.
handle_scope_implementer->IncrementCallDepth();
Execution::RunMicrotasks(isolate);
handle_scope_implementer->DecrementCallDepth();
}
void V8::InitializeOncePerProcessImpl() {
FlagList::EnforceFlagImplications();
if (FLAG_predictable && FLAG_random_seed == 0) {
// Avoid random seeds in predictable mode.
FLAG_random_seed = 12347;
}
if (FLAG_stress_compaction) {
FLAG_force_marking_deque_overflows = true;
FLAG_gc_global = true;
FLAG_max_new_space_size = (1 << (kPageSizeBits - 10)) * 2;
}
#ifdef V8_USE_DEFAULT_PLATFORM
platform_ = new DefaultPlatform;
#endif
Sampler::SetUp();
CPU::SetUp();
OS::PostSetUp();
ElementsAccessor::InitializeOncePerProcess();
LOperand::SetUpCaches();
SetUpJSCallerSavedCodeData();
ExternalReference::SetUp();
Bootstrapper::InitializeOncePerProcess();
}
void V8::InitializeOncePerProcess() {
CallOnce(&init_once, &InitializeOncePerProcessImpl);
}
void V8::InitializePlatform(v8::Platform* platform) {
ASSERT(!platform_);
ASSERT(platform);
platform_ = platform;
}
void V8::ShutdownPlatform() {
ASSERT(platform_);
platform_ = NULL;
}
v8::Platform* V8::GetCurrentPlatform() {
ASSERT(platform_);
return platform_;
}
} } // namespace v8::internal
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