v8/src/v8.cc

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// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/v8.h"
#include "src/assembler.h"
#include "src/base/once.h"
#include "src/base/platform/platform.h"
#include "src/bootstrapper.h"
#include "src/compiler/pipeline.h"
#include "src/debug.h"
#include "src/deoptimizer.h"
#include "src/elements.h"
#include "src/frames.h"
#include "src/heap/store-buffer.h"
#include "src/heap-profiler.h"
#include "src/hydrogen.h"
#include "src/isolate.h"
#include "src/lithium-allocator.h"
#include "src/objects.h"
#include "src/runtime-profiler.h"
#include "src/sampler.h"
#include "src/serialize.h"
namespace v8 {
namespace internal {
V8_DECLARE_ONCE(init_once);
v8::ArrayBuffer::Allocator* V8::array_buffer_allocator_ = NULL;
v8::Platform* V8::platform_ = NULL;
bool V8::Initialize(Deserializer* des) {
InitializeOncePerProcess();
Isolate* isolate = Isolate::UncheckedCurrent();
if (isolate == NULL) return true;
if (isolate->IsDead()) return false;
if (isolate->IsInitialized()) return true;
return isolate->Init(des);
}
void V8::TearDown() {
Bootstrapper::TearDownExtensions();
ElementsAccessor::TearDown();
LOperand::TearDownCaches();
compiler::Pipeline::TearDown();
ExternalReference::TearDownMathExpData();
RegisteredExtension::UnregisterAll();
Isolate::GlobalTearDown();
Sampler::TearDown();
FlagList::ResetAllFlags(); // Frees memory held by string arguments.
}
void V8::SetReturnAddressLocationResolver(
ReturnAddressLocationResolver resolver) {
StackFrame::SetReturnAddressLocationResolver(resolver);
}
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_semi_space_size = 1;
}
base::OS::Initialize(FLAG_random_seed, FLAG_hard_abort, FLAG_gc_fake_mmap);
Sampler::SetUp();
CpuFeatures::Probe(false);
init_memcopy_functions();
// The custom exp implementation needs 16KB of lookup data; initialize it
// on demand.
init_fast_sqrt_function();
#ifdef _WIN64
init_modulo_function();
#endif
ElementsAccessor::InitializeOncePerProcess();
LOperand::SetUpCaches();
compiler::Pipeline::SetUp();
SetUpJSCallerSavedCodeData();
ExternalReference::SetUp();
Bootstrapper::InitializeOncePerProcess();
}
void V8::InitializeOncePerProcess() {
base::CallOnce(&init_once, &InitializeOncePerProcessImpl);
}
void V8::InitializePlatform(v8::Platform* platform) {
CHECK(!platform_);
CHECK(platform);
platform_ = platform;
}
void V8::ShutdownPlatform() {
CHECK(platform_);
platform_ = NULL;
}
v8::Platform* V8::GetCurrentPlatform() {
DCHECK(platform_);
return platform_;
}
} } // namespace v8::internal