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// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "vm/bootstrap_natives.h"
#include "vm/dart_api_impl.h"
#include "vm/datastream.h"
#include "vm/exceptions.h"
#include "vm/flags.h"
#include "vm/growable_array.h"
#include "vm/kernel_isolate.h"
#include "vm/message.h"
#include "vm/message_handler.h"
#include "vm/message_snapshot.h"
#include "vm/native_entry.h"
#include "vm/object.h"
#include "vm/port.h"
#include "vm/service_event.h"
#include "vm/service_isolate.h"
#include "vm/symbols.h"
namespace dart {
DECLARE_FLAG(bool, trace_service);
#ifndef PRODUCT
class RegisterRunningIsolatesVisitor : public IsolateVisitor {
public:
explicit RegisterRunningIsolatesVisitor(Thread* thread)
: IsolateVisitor(),
zone_(thread->zone()),
register_function_(Function::Handle(thread->zone())),
service_isolate_(thread->isolate()) {}
virtual void VisitIsolate(Isolate* isolate) {
isolate_ports_.Add(isolate->main_port());
isolate_names_.Add(&String::Handle(zone_, String::New(isolate->name())));
isolate->set_is_service_registered(true);
}
void RegisterIsolates() {
ServiceIsolate::RegisterRunningIsolates(isolate_ports_, isolate_names_);
}
private:
Zone* zone_;
GrowableArray<Dart_Port> isolate_ports_;
GrowableArray<const String*> isolate_names_;
Function& register_function_;
Isolate* service_isolate_;
};
#endif // !PRODUCT
DEFINE_NATIVE_ENTRY(VMService_SendIsolateServiceMessage, 0, 2) {
#ifndef PRODUCT
GET_NON_NULL_NATIVE_ARGUMENT(SendPort, sp, arguments->NativeArgAt(0));
GET_NON_NULL_NATIVE_ARGUMENT(Array, message, arguments->NativeArgAt(1));
// Set the type of the OOB message.
message.SetAt(0,
Smi::Handle(thread->zone(), Smi::New(Message::kServiceOOBMsg)));
// Serialize message.
// TODO(turnidge): Throw an exception when the return value is false?
bool result = PortMap::PostMessage(WriteMessage(
/* same_group */ false, message, sp.Id(), Message::kOOBPriority));
return Bool::Get(result).ptr();
#else
return Object::null();
#endif
}
DEFINE_NATIVE_ENTRY(VMService_SendRootServiceMessage, 0, 1) {
#ifndef PRODUCT
GET_NON_NULL_NATIVE_ARGUMENT(Array, message, arguments->NativeArgAt(0));
return Service::HandleRootMessage(message);
#endif
return Object::null();
}
DEFINE_NATIVE_ENTRY(VMService_SendObjectRootServiceMessage, 0, 1) {
#ifndef PRODUCT
GET_NON_NULL_NATIVE_ARGUMENT(Array, message, arguments->NativeArgAt(0));
return Service::HandleObjectRootMessage(message);
#endif
return Object::null();
}
DEFINE_NATIVE_ENTRY(VMService_OnStart, 0, 0) {
#ifndef PRODUCT
if (FLAG_trace_service) {
OS::PrintErr("vm-service: Booting dart:vmservice library.\n");
}
// Boot the dart:vmservice library.
ServiceIsolate::BootVmServiceLibrary();
// Register running isolates with service.
RegisterRunningIsolatesVisitor register_isolates(thread);
if (FLAG_trace_service) {
OS::PrintErr("vm-service: Registering running isolates.\n");
}
Isolate::VisitIsolates(&register_isolates);
register_isolates.RegisterIsolates();
#endif
return Object::null();
}
DEFINE_NATIVE_ENTRY(VMService_OnExit, 0, 0) {
#ifndef PRODUCT
if (FLAG_trace_service) {
OS::PrintErr("vm-service: processed exit message.\n");
OS::PrintErr("vm-service: has live ports: %s\n",
isolate->HasLivePorts() ? "yes" : "no");
}
#endif
return Object::null();
}
DEFINE_NATIVE_ENTRY(VMService_OnServerAddressChange, 0, 1) {
#ifndef PRODUCT
GET_NATIVE_ARGUMENT(String, address, arguments->NativeArgAt(0));
if (address.IsNull()) {
ServiceIsolate::SetServerAddress(nullptr);
} else {
ServiceIsolate::SetServerAddress(address.ToCString());
}
#endif
return Object::null();
}
DEFINE_NATIVE_ENTRY(VMService_ListenStream, 0, 2) {
#ifndef PRODUCT
GET_NON_NULL_NATIVE_ARGUMENT(String, stream_id, arguments->NativeArgAt(0));
GET_NON_NULL_NATIVE_ARGUMENT(Bool, include_privates,
arguments->NativeArgAt(1));
bool result =
Service::ListenStream(stream_id.ToCString(), include_privates.value());
return Bool::Get(result).ptr();
#else
return Object::null();
#endif
}
DEFINE_NATIVE_ENTRY(VMService_CancelStream, 0, 1) {
#ifndef PRODUCT
GET_NON_NULL_NATIVE_ARGUMENT(String, stream_id, arguments->NativeArgAt(0));
Service::CancelStream(stream_id.ToCString());
#endif
return Object::null();
}
DEFINE_NATIVE_ENTRY(VMService_RequestAssets, 0, 0) {
#ifndef PRODUCT
return Service::RequestAssets();
#else
return Object::null();
#endif
}
#ifndef PRODUCT
// TODO(25041): When reading, this class copies out the filenames and contents
// into new buffers. It does this because the lifetime of |bytes| is uncertain.
// If |bytes| is pinned in memory, then we could instead load up
// |filenames_| and |contents_| with pointers into |bytes| without making
// copies.
class TarArchive {
public:
TarArchive(uint8_t* bytes, intptr_t bytes_length)
: rs_(bytes, bytes_length) {}
void Read() {
while (HasNext()) {
char* filename;
uint8_t* data;
intptr_t data_length;
if (Next(&filename, &data, &data_length)) {
filenames_.Add(filename);
contents_.Add(data);
content_lengths_.Add(data_length);
}
}
}
char* NextFilename() { return filenames_.RemoveLast(); }
uint8_t* NextContent() { return contents_.RemoveLast(); }
intptr_t NextContentLength() { return content_lengths_.RemoveLast(); }
bool HasMore() const { return filenames_.length() > 0; }
intptr_t Length() const { return filenames_.length(); }
private:
enum TarHeaderFields {
kTarHeaderFilenameOffset = 0,
kTarHeaderFilenameSize = 100,
kTarHeaderSizeOffset = 124,
kTarHeaderSizeSize = 12,
kTarHeaderTypeOffset = 156,
kTarHeaderTypeSize = 1,
kTarHeaderSize = 512,
};
enum TarType {
kTarAregType = '\0',
kTarRegType = '0',
kTarLnkType = '1',
kTarSymType = '2',
kTarChrType = '3',
kTarBlkType = '4',
kTarDirType = '5',
kTarFifoType = '6',
kTarContType = '7',
kTarXhdType = 'x',
kTarXglType = 'g',
};
bool HasNext() const { return !EndOfArchive(); }
bool Next(char** filename, uint8_t** data, intptr_t* data_length) {
intptr_t startOfBlock = rs_.Position();
*filename = ReadFilename();
rs_.SetPosition(startOfBlock + kTarHeaderSizeOffset);
intptr_t size = ReadSize();
rs_.SetPosition(startOfBlock + kTarHeaderTypeOffset);
TarType type = ReadType();
SeekToNextBlock(kTarHeaderSize);
if ((type != kTarRegType) && (type != kTarAregType)) {
SkipContents(size);
return false;
}
ReadContents(data, size);
*data_length = size;
return true;
}
void SeekToNextBlock(intptr_t blockSize) {
intptr_t remainder = blockSize - (rs_.Position() % blockSize);
rs_.Advance(remainder);
}
uint8_t PeekByte(intptr_t i) const {
return *(rs_.AddressOfCurrentPosition() + i);
}
bool EndOfArchive() const {
if (rs_.PendingBytes() < (kTarHeaderSize * 2)) {
return true;
}
for (intptr_t i = 0; i < (kTarHeaderSize * 2); i++) {
if (PeekByte(i) != 0) {
return false;
}
}
return true;
}
TarType ReadType() {
return static_cast<TarType>(ReadStream::Raw<1, uint8_t>::Read(&rs_));
}
void SkipContents(intptr_t size) {
rs_.Advance(size);
SeekToNextBlock(kTarHeaderSize);
}
intptr_t ReadCString(char** s, intptr_t length) {
intptr_t to_read = Utils::Minimum(length, rs_.PendingBytes());
char* result = new char[to_read + 1];
strncpy(result,
reinterpret_cast<const char*>(rs_.AddressOfCurrentPosition()),
to_read);
result[to_read] = '\0';
rs_.SetPosition(rs_.Position() + to_read);
*s = result;
return to_read;
}
intptr_t ReadSize() {
char* octalSize;
unsigned int size;
ReadCString(&octalSize, kTarHeaderSizeSize);
int result = sscanf(octalSize, "%o", &size);
delete[] octalSize;
if (result != 1) {
return 0;
}
return size;
}
char* ReadFilename() {
char* result;
intptr_t result_length = ReadCString(&result, kTarHeaderFilenameSize);
if (result[0] == '/') {
return result;
}
char* fixed_result = new char[result_length + 2]; // '/' + '\0'.
fixed_result[0] = '/';
strncpy(&fixed_result[1], result, result_length);
fixed_result[result_length + 1] = '\0';
delete[] result;
return fixed_result;
}
void ReadContents(uint8_t** data, intptr_t size) {
uint8_t* result = new uint8_t[size];
rs_.ReadBytes(result, size);
SeekToNextBlock(kTarHeaderSize);
*data = result;
}
ReadStream rs_;
GrowableArray<char*> filenames_;
GrowableArray<uint8_t*> contents_;
GrowableArray<intptr_t> content_lengths_;
DISALLOW_COPY_AND_ASSIGN(TarArchive);
};
static void ContentsFinalizer(void* isolate_callback_data, void* peer) {
uint8_t* data = reinterpret_cast<uint8_t*>(peer);
delete[] data;
}
#endif
DEFINE_NATIVE_ENTRY(VMService_DecodeAssets, 0, 1) {
#ifndef PRODUCT
GET_NON_NULL_NATIVE_ARGUMENT(TypedData, data, arguments->NativeArgAt(0));
Api::Scope scope(thread);
Dart_Handle data_handle = Api::NewHandle(thread, data.ptr());
Dart_Handle result_list;
{
TransitionVMToNative transition(thread);
Dart_TypedData_Type typ;
void* bytes;
intptr_t length;
Dart_Handle err =
Dart_TypedDataAcquireData(data_handle, &typ, &bytes, &length);
ASSERT(!Dart_IsError(err));
TarArchive archive(reinterpret_cast<uint8_t*>(bytes), length);
archive.Read();
err = Dart_TypedDataReleaseData(data_handle);
ASSERT(!Dart_IsError(err));
intptr_t archive_size = archive.Length();
result_list = Dart_NewList(2 * archive_size);
ASSERT(!Dart_IsError(result_list));
intptr_t idx = 0;
while (archive.HasMore()) {
char* filename = archive.NextFilename();
intptr_t filename_length = strlen(filename);
uint8_t* contents = archive.NextContent();
intptr_t contents_length = archive.NextContentLength();
Dart_Handle dart_filename = Dart_NewStringFromUTF8(
reinterpret_cast<uint8_t*>(filename), filename_length);
ASSERT(!Dart_IsError(dart_filename));
Dart_Handle dart_contents = Dart_NewExternalTypedDataWithFinalizer(
Dart_TypedData_kUint8, contents, contents_length, contents,
contents_length, ContentsFinalizer);
ASSERT(!Dart_IsError(dart_contents));
Dart_ListSetAt(result_list, idx, dart_filename);
Dart_ListSetAt(result_list, (idx + 1), dart_contents);
idx += 2;
}
}
return Api::UnwrapArrayHandle(thread->zone(), result_list).ptr();
#else
return Object::null();
#endif
}
#ifndef PRODUCT
class UserTagIsolatesVisitor : public IsolateVisitor {
public:
UserTagIsolatesVisitor(Thread* thread,
const GrowableObjectArray* user_tags,
bool set_streamable)
: IsolateVisitor(),
thread_(thread),
user_tags_(user_tags),
set_streamable_(set_streamable) {}
virtual void VisitIsolate(Isolate* isolate) {
if (Isolate::IsVMInternalIsolate(isolate)) {
return;
}
Zone* zone = thread_->zone();
UserTag& tag = UserTag::Handle(zone);
String& label = String::Handle(zone);
for (intptr_t i = 0; i < user_tags_->Length(); ++i) {
label ^= user_tags_->At(i);
tag ^= UserTag::FindTagInIsolate(isolate, thread_, label);
if (!tag.IsNull()) {
tag.set_streamable(set_streamable_);
}
}
}
private:
Thread* thread_;
const GrowableObjectArray* user_tags_;
bool set_streamable_;
DISALLOW_COPY_AND_ASSIGN(UserTagIsolatesVisitor);
};
#endif // !PRODUCT
DEFINE_NATIVE_ENTRY(VMService_AddUserTagsToStreamableSampleList, 0, 1) {
#ifndef PRODUCT
GET_NON_NULL_NATIVE_ARGUMENT(GrowableObjectArray, user_tags,
arguments->NativeArgAt(0));
Object& obj = Object::Handle();
for (intptr_t i = 0; i < user_tags.Length(); ++i) {
obj = user_tags.At(i);
UserTags::AddStreamableTagName(obj.ToCString());
}
UserTagIsolatesVisitor visitor(thread, &user_tags, true);
Isolate::VisitIsolates(&visitor);
#endif
return Object::null();
}
DEFINE_NATIVE_ENTRY(VMService_RemoveUserTagsFromStreamableSampleList, 0, 1) {
#ifndef PRODUCT
GET_NON_NULL_NATIVE_ARGUMENT(GrowableObjectArray, user_tags,
arguments->NativeArgAt(0));
Object& obj = Object::Handle();
for (intptr_t i = 0; i < user_tags.Length(); ++i) {
obj = user_tags.At(i);
UserTags::RemoveStreamableTagName(obj.ToCString());
}
UserTagIsolatesVisitor visitor(thread, &user_tags, false);
Isolate::VisitIsolates(&visitor);
#endif
return Object::null();
}
} // namespace dart