| // Copyright 2013 The Chromium 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 "gin/public/isolate_holder.h" |
| |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "base/files/memory_mapped_file.h" |
| #include "base/logging.h" |
| #include "base/message_loop/message_loop.h" |
| #include "base/rand_util.h" |
| #include "base/strings/sys_string_conversions.h" |
| #include "base/sys_info.h" |
| #include "crypto/sha2.h" |
| #include "gin/array_buffer.h" |
| #include "gin/debug_impl.h" |
| #include "gin/function_template.h" |
| #include "gin/per_isolate_data.h" |
| #include "gin/public/v8_platform.h" |
| #include "gin/run_microtasks_observer.h" |
| |
| #if defined(V8_USE_EXTERNAL_STARTUP_DATA) |
| #if defined(OS_MACOSX) |
| #include "base/mac/foundation_util.h" |
| #endif // OS_MACOSX |
| #include "base/path_service.h" |
| #endif // V8_USE_EXTERNAL_STARTUP_DATA |
| |
| namespace gin { |
| |
| namespace { |
| |
| v8::ArrayBuffer::Allocator* g_array_buffer_allocator = NULL; |
| |
| bool GenerateEntropy(unsigned char* buffer, size_t amount) { |
| base::RandBytes(buffer, amount); |
| return true; |
| } |
| |
| base::MemoryMappedFile* g_mapped_natives = NULL; |
| base::MemoryMappedFile* g_mapped_snapshot = NULL; |
| |
| #if defined(V8_USE_EXTERNAL_STARTUP_DATA) |
| bool MapV8Files(base::FilePath* natives_path, |
| base::FilePath* snapshot_path, |
| int natives_fd = -1, |
| int snapshot_fd = -1, |
| base::MemoryMappedFile::Region natives_region = |
| base::MemoryMappedFile::Region::kWholeFile, |
| base::MemoryMappedFile::Region snapshot_region = |
| base::MemoryMappedFile::Region::kWholeFile) { |
| int flags = base::File::FLAG_OPEN | base::File::FLAG_READ; |
| |
| g_mapped_natives = new base::MemoryMappedFile; |
| if (!g_mapped_natives->IsValid()) { |
| #if !defined(OS_WIN) |
| if (natives_fd == -1 |
| ? !g_mapped_natives->Initialize(base::File(*natives_path, flags), |
| natives_region) |
| : !g_mapped_natives->Initialize(base::File(natives_fd), |
| natives_region)) { |
| #else |
| if (!g_mapped_natives->Initialize(base::File(*natives_path, flags), |
| natives_region)) { |
| #endif // !OS_WIN |
| delete g_mapped_natives; |
| g_mapped_natives = NULL; |
| LOG(FATAL) << "Couldn't mmap v8 natives data file"; |
| return false; |
| } |
| } |
| |
| g_mapped_snapshot = new base::MemoryMappedFile; |
| if (!g_mapped_snapshot->IsValid()) { |
| #if !defined(OS_WIN) |
| if (snapshot_fd == -1 |
| ? !g_mapped_snapshot->Initialize(base::File(*snapshot_path, flags), |
| snapshot_region) |
| : !g_mapped_snapshot->Initialize(base::File(snapshot_fd), |
| snapshot_region)) { |
| #else |
| if (!g_mapped_snapshot->Initialize(base::File(*snapshot_path, flags), |
| snapshot_region)) { |
| #endif // !OS_WIN |
| delete g_mapped_snapshot; |
| g_mapped_snapshot = NULL; |
| LOG(ERROR) << "Couldn't mmap v8 snapshot data file"; |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| #if defined(V8_VERIFY_EXTERNAL_STARTUP_DATA) |
| bool VerifyV8SnapshotFile(base::MemoryMappedFile* snapshot_file, |
| const unsigned char* fingerprint) { |
| unsigned char output[crypto::kSHA256Length]; |
| crypto::SHA256HashString( |
| base::StringPiece(reinterpret_cast<const char*>(snapshot_file->data()), |
| snapshot_file->length()), |
| output, sizeof(output)); |
| return !memcmp(fingerprint, output, sizeof(output)); |
| } |
| #endif // V8_VERIFY_EXTERNAL_STARTUP_DATA |
| #endif // V8_USE_EXTERNAL_STARTUP_DATA |
| |
| } // namespace |
| |
| #if defined(V8_USE_EXTERNAL_STARTUP_DATA) |
| |
| #if defined(V8_VERIFY_EXTERNAL_STARTUP_DATA) |
| // Defined in gen/gin/v8_snapshot_fingerprint.cc |
| extern const unsigned char g_natives_fingerprint[]; |
| extern const unsigned char g_snapshot_fingerprint[]; |
| #endif // V8_VERIFY_EXTERNAL_STARTUP_DATA |
| |
| #if !defined(OS_MACOSX) |
| const int IsolateHolder::kV8SnapshotBasePathKey = |
| #if defined(OS_ANDROID) |
| base::DIR_ANDROID_APP_DATA; |
| #elif defined(OS_POSIX) |
| base::DIR_EXE; |
| #elif defined(OS_WIN) |
| base::DIR_MODULE; |
| #endif // OS_ANDROID |
| #endif // !OS_MACOSX |
| |
| const char IsolateHolder::kNativesFileName[] = "natives_blob.bin"; |
| const char IsolateHolder::kSnapshotFileName[] = "snapshot_blob.bin"; |
| |
| // static |
| bool IsolateHolder::LoadV8Snapshot() { |
| if (g_mapped_natives && g_mapped_snapshot) |
| return true; |
| |
| #if !defined(OS_MACOSX) |
| base::FilePath data_path; |
| PathService::Get(kV8SnapshotBasePathKey, &data_path); |
| DCHECK(!data_path.empty()); |
| |
| base::FilePath natives_path = data_path.AppendASCII(kNativesFileName); |
| base::FilePath snapshot_path = data_path.AppendASCII(kSnapshotFileName); |
| #else // !defined(OS_MACOSX) |
| base::ScopedCFTypeRef<CFStringRef> natives_file_name( |
| base::SysUTF8ToCFStringRef(kNativesFileName)); |
| base::FilePath natives_path = base::mac::PathForFrameworkBundleResource( |
| natives_file_name); |
| base::ScopedCFTypeRef<CFStringRef> snapshot_file_name( |
| base::SysUTF8ToCFStringRef(kSnapshotFileName)); |
| base::FilePath snapshot_path = base::mac::PathForFrameworkBundleResource( |
| snapshot_file_name); |
| DCHECK(!natives_path.empty()); |
| DCHECK(!snapshot_path.empty()); |
| #endif // !defined(OS_MACOSX) |
| |
| if (!MapV8Files(&natives_path, &snapshot_path)) |
| return false; |
| |
| #if defined(V8_VERIFY_EXTERNAL_STARTUP_DATA) |
| return VerifyV8SnapshotFile(g_mapped_natives, g_natives_fingerprint) && |
| VerifyV8SnapshotFile(g_mapped_snapshot, g_snapshot_fingerprint); |
| #else |
| return true; |
| #endif // V8_VERIFY_EXTERNAL_STARTUP_DATA |
| } |
| |
| //static |
| bool IsolateHolder::LoadV8SnapshotFd(int natives_fd, |
| int64 natives_offset, |
| int64 natives_size, |
| int snapshot_fd, |
| int64 snapshot_offset, |
| int64 snapshot_size) { |
| if (g_mapped_natives && g_mapped_snapshot) |
| return true; |
| |
| base::MemoryMappedFile::Region natives_region = |
| base::MemoryMappedFile::Region::kWholeFile; |
| if (natives_size != 0 || natives_offset != 0) { |
| natives_region = |
| base::MemoryMappedFile::Region(natives_offset, natives_size); |
| } |
| |
| base::MemoryMappedFile::Region snapshot_region = |
| base::MemoryMappedFile::Region::kWholeFile; |
| if (natives_size != 0 || natives_offset != 0) { |
| snapshot_region = |
| base::MemoryMappedFile::Region(snapshot_offset, snapshot_size); |
| } |
| |
| return MapV8Files( |
| NULL, NULL, natives_fd, snapshot_fd, natives_region, snapshot_region); |
| } |
| #endif // V8_USE_EXTERNAL_STARTUP_DATA |
| |
| //static |
| void IsolateHolder::GetV8ExternalSnapshotData(const char** natives_data_out, |
| int* natives_size_out, |
| const char** snapshot_data_out, |
| int* snapshot_size_out) { |
| if (!g_mapped_natives || !g_mapped_snapshot) { |
| *natives_data_out = *snapshot_data_out = NULL; |
| *natives_size_out = *snapshot_size_out = 0; |
| return; |
| } |
| *natives_data_out = reinterpret_cast<const char*>(g_mapped_natives->data()); |
| *snapshot_data_out = reinterpret_cast<const char*>(g_mapped_snapshot->data()); |
| *natives_size_out = static_cast<int>(g_mapped_natives->length()); |
| *snapshot_size_out = static_cast<int>(g_mapped_snapshot->length()); |
| } |
| |
| IsolateHolder::IsolateHolder() { |
| CHECK(g_array_buffer_allocator) |
| << "You need to invoke gin::IsolateHolder::Initialize first"; |
| v8::Isolate::CreateParams params; |
| params.entry_hook = DebugImpl::GetFunctionEntryHook(); |
| params.code_event_handler = DebugImpl::GetJitCodeEventHandler(); |
| params.constraints.ConfigureDefaults(base::SysInfo::AmountOfPhysicalMemory(), |
| base::SysInfo::AmountOfVirtualMemory(), |
| base::SysInfo::NumberOfProcessors()); |
| isolate_ = v8::Isolate::New(params); |
| isolate_data_.reset(new PerIsolateData(isolate_, g_array_buffer_allocator)); |
| #if defined(OS_WIN) |
| { |
| void* code_range; |
| size_t size; |
| isolate_->GetCodeRange(&code_range, &size); |
| Debug::CodeRangeCreatedCallback callback = |
| DebugImpl::GetCodeRangeCreatedCallback(); |
| if (code_range && size && callback) |
| callback(code_range, size); |
| } |
| #endif |
| } |
| |
| IsolateHolder::~IsolateHolder() { |
| if (task_observer_.get()) |
| base::MessageLoop::current()->RemoveTaskObserver(task_observer_.get()); |
| #if defined(OS_WIN) |
| { |
| void* code_range; |
| size_t size; |
| isolate_->GetCodeRange(&code_range, &size); |
| Debug::CodeRangeDeletedCallback callback = |
| DebugImpl::GetCodeRangeDeletedCallback(); |
| if (code_range && callback) |
| callback(code_range); |
| } |
| #endif |
| isolate_data_.reset(); |
| isolate_->Dispose(); |
| isolate_ = NULL; |
| } |
| |
| // static |
| void IsolateHolder::Initialize(ScriptMode mode, |
| v8::ArrayBuffer::Allocator* allocator) { |
| CHECK(allocator); |
| static bool v8_is_initialized = false; |
| if (v8_is_initialized) |
| return; |
| v8::V8::InitializePlatform(V8Platform::Get()); |
| v8::V8::SetArrayBufferAllocator(allocator); |
| g_array_buffer_allocator = allocator; |
| if (mode == gin::IsolateHolder::kStrictMode) { |
| static const char use_strict[] = "--use_strict"; |
| v8::V8::SetFlagsFromString(use_strict, sizeof(use_strict) - 1); |
| } |
| v8::V8::SetEntropySource(&GenerateEntropy); |
| #if defined(V8_USE_EXTERNAL_STARTUP_DATA) |
| v8::StartupData natives; |
| natives.data = reinterpret_cast<const char*>(g_mapped_natives->data()); |
| natives.raw_size = static_cast<int>(g_mapped_natives->length()); |
| v8::V8::SetNativesDataBlob(&natives); |
| |
| v8::StartupData snapshot; |
| snapshot.data = reinterpret_cast<const char*>(g_mapped_snapshot->data()); |
| snapshot.raw_size = static_cast<int>(g_mapped_snapshot->length()); |
| v8::V8::SetSnapshotDataBlob(&snapshot); |
| #endif // V8_USE_EXTERNAL_STARTUP_DATA |
| v8::V8::Initialize(); |
| v8_is_initialized = true; |
| } |
| |
| void IsolateHolder::AddRunMicrotasksObserver() { |
| DCHECK(!task_observer_.get()); |
| task_observer_.reset(new RunMicrotasksObserver(isolate_));; |
| base::MessageLoop::current()->AddTaskObserver(task_observer_.get()); |
| } |
| |
| void IsolateHolder::RemoveRunMicrotasksObserver() { |
| DCHECK(task_observer_.get()); |
| base::MessageLoop::current()->RemoveTaskObserver(task_observer_.get()); |
| task_observer_.reset(); |
| } |
| |
| } // namespace gin |
