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Merge pull request #2611 from atom/pod-optimize

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Optimize memory usage when using remote module
This commit is contained in:
Cheng Zhao 2015-08-27 20:51:02 +08:00
commit c91ab5ec7c
17 changed files with 151 additions and 248 deletions
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2
atom/browser/api/event_emitter.h
View file

@ -45,6 +45,8 @@ class EventEmitter : public Wrappable {
content::WebContents* sender,
IPC::Message* message,
const Args&... args) {
v8::Locker locker(isolate());
v8::HandleScope handle_scope(isolate());
v8::Local<v8::Object> event = CreateJSEvent(isolate(), sender, message);
return EmitWithEvent(name, event, args...);
}

115
atom/browser/lib/objects-registry.coffee
View file

@ -1,82 +1,65 @@
EventEmitter = require('events').EventEmitter
IDWeakMap = process.atomBinding('id_weak_map').IDWeakMap
v8Util = process.atomBinding 'v8_util'
# Class to reference all objects.
class ObjectsStore
@stores = {}
constructor: ->
@nextId = 0
@objects = []
getNextId: ->
++@nextId
add: (obj) ->
id = @getNextId()
@objects[id] = obj
id
has: (id) ->
@objects[id]?
remove: (id) ->
throw new Error("Invalid key #{id} for ObjectsStore") unless @has id
delete @objects[id]
get: (id) ->
throw new Error("Invalid key #{id} for ObjectsStore") unless @has id
@objects[id]
@forRenderView: (key) ->
@stores[key] = new ObjectsStore unless @stores[key]?
@stores[key]
@releaseForRenderView: (key) ->
delete @stores[key]
class ObjectsRegistry extends EventEmitter
constructor: ->
@setMaxListeners Number.MAX_VALUE
@nextId = 0
# Objects in weak map will be not referenced (so we won't leak memory), and
# every object created in browser will have a unique id in weak map.
@objectsWeakMap = new IDWeakMap
@objectsWeakMap.add = (obj) ->
id = IDWeakMap::add.call this, obj
v8Util.setHiddenValue obj, 'atomId', id
id
# Stores all objects by ref-counting.
# (id) => {object, count}
@storage = {}
# Stores the IDs of objects referenced by WebContents.
# (webContentsId) => {(id) => (count)}
@owners = {}
# Register a new object, the object would be kept referenced until you release
# it explicitly.
add: (key, obj) ->
# Some native objects may already been added to objectsWeakMap, be care not
# to add it twice.
@objectsWeakMap.add obj unless v8Util.getHiddenValue obj, 'atomId'
id = v8Util.getHiddenValue obj, 'atomId'
add: (webContentsId, obj) ->
id = @saveToStorage obj
# Remember the owner.
@owners[webContentsId] ?= {}
@owners[webContentsId][id] ?= 0
@owners[webContentsId][id]++
# Returns object's id
id
# Store and reference the object, then return the storeId which points to
# where the object is stored. The caller can later dereference the object
# with the storeId.
# We use a difference key because the same object can be referenced for
# multiple times by the same renderer view.
store = ObjectsStore.forRenderView key
storeId = store.add obj
[id, storeId]
# Get an object according to its id.
# Get an object according to its ID.
get: (id) ->
@objectsWeakMap.get id
@storage[id]?.object
# Remove an object according to its storeId.
remove: (key, storeId) ->
ObjectsStore.forRenderView(key).remove storeId
# Dereference an object according to its ID.
remove: (webContentsId, id) ->
@dereference id, 1
# Also reduce the count in owner.
pointer = @owners[webContentsId]
--pointer[id]
delete pointer[id] if pointer[id] is 0
# Clear all references to objects from renderer view.
clear: (key) ->
@emit "clear-#{key}"
ObjectsStore.releaseForRenderView key
# Clear all references to objects refrenced by the WebContents.
clear: (webContentsId) ->
@emit "clear-#{webContentsId}"
return unless @owners[webContentsId]?
@dereference id, count for id, count of @owners[webContentsId]
delete @owners[webContentsId]
# Private: Saves the object into storage and assigns an ID for it.
saveToStorage: (object) ->
id = v8Util.getHiddenValue object, 'atomId'
unless id
id = ++@nextId
@storage[id] = {count: 0, object}
v8Util.setHiddenValue object, 'atomId', id
++@storage[id].count
id
# Private: Dereference the object from store.
dereference: (id, count) ->
pointer = @storage[id]
pointer.count -= count
if pointer.count is 0
v8Util.deleteHiddenValue pointer.object, 'atomId'
delete @storage[id]
module.exports = new ObjectsRegistry

16
atom/browser/lib/rpc-server.coffee
View file

@ -4,7 +4,7 @@ objectsRegistry = require './objects-registry.js'
v8Util = process.atomBinding 'v8_util'
# Convert a real value into meta data.
valueToMeta = (sender, value) ->
valueToMeta = (sender, value, optimizeSimpleObject=false) ->
meta = type: typeof value
meta.type = 'buffer' if Buffer.isBuffer value
@ -12,6 +12,10 @@ valueToMeta = (sender, value) ->
meta.type = 'array' if Array.isArray value
meta.type = 'promise' if value? and value.constructor.name is 'Promise'
# Treat simple objects as value.
if optimizeSimpleObject and meta.type is 'object' and v8Util.getHiddenValue value, 'simple'
meta.type = 'value'
# Treat the arguments object as array.
meta.type = 'array' if meta.type is 'object' and value.callee? and value.length?
@ -24,7 +28,7 @@ valueToMeta = (sender, value) ->
# Reference the original value if it's an object, because when it's
# passed to renderer we would assume the renderer keeps a reference of
# it.
[meta.id, meta.storeId] = objectsRegistry.add sender.getId(), value
meta.id = objectsRegistry.add sender.getId(), value
meta.members = []
meta.members.push {name: prop, type: typeof field} for prop, field of value
@ -80,11 +84,11 @@ unwrapArgs = (sender, args) ->
callFunction = (event, func, caller, args) ->
if v8Util.getHiddenValue(func, 'asynchronous') and typeof args[args.length - 1] isnt 'function'
args.push (ret) ->
event.returnValue = valueToMeta event.sender, ret
event.returnValue = valueToMeta event.sender, ret, true
func.apply caller, args
else
ret = func.apply caller, args
event.returnValue = valueToMeta event.sender, ret
event.returnValue = valueToMeta event.sender, ret, true
# Send by BrowserWindow when its render view is deleted.
process.on 'ATOM_BROWSER_RELEASE_RENDER_VIEW', (id) ->
@ -170,8 +174,8 @@ ipc.on 'ATOM_BROWSER_MEMBER_GET', (event, id, name) ->
catch e
event.returnValue = errorToMeta e
ipc.on 'ATOM_BROWSER_DEREFERENCE', (event, storeId) ->
objectsRegistry.remove event.sender.getId(), storeId
ipc.on 'ATOM_BROWSER_DEREFERENCE', (event, id) ->
objectsRegistry.remove event.sender.getId(), id
ipc.on 'ATOM_BROWSER_GUEST_WEB_CONTENTS', (event, guestInstanceId) ->
try

80
atom/common/api/atom_api_id_weak_map.cc
View file

@ -1,80 +0,0 @@
// Copyright (c) 2013 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "atom/common/api/atom_api_id_weak_map.h"
#include "native_mate/constructor.h"
#include "native_mate/object_template_builder.h"
#include "atom/common/node_includes.h"
namespace atom {
namespace api {
IDWeakMap::IDWeakMap() {
}
IDWeakMap::~IDWeakMap() {
}
int32_t IDWeakMap::Add(v8::Isolate* isolate, v8::Local<v8::Object> object) {
return map_.Add(isolate, object);
}
v8::Local<v8::Value> IDWeakMap::Get(v8::Isolate* isolate, int32_t key) {
v8::MaybeLocal<v8::Object> result = map_.Get(isolate, key);
if (result.IsEmpty()) {
isolate->ThrowException(v8::Exception::Error(
mate::StringToV8(isolate, "Invalid key")));
return v8::Undefined(isolate);
} else {
return result.ToLocalChecked();
}
}
bool IDWeakMap::Has(int32_t key) const {
return map_.Has(key);
}
std::vector<int32_t> IDWeakMap::Keys() const {
return map_.Keys();
}
void IDWeakMap::Remove(int32_t key) {
map_.Remove(key);
}
// static
void IDWeakMap::BuildPrototype(v8::Isolate* isolate,
v8::Local<v8::ObjectTemplate> prototype) {
mate::ObjectTemplateBuilder(isolate, prototype)
.SetMethod("add", &IDWeakMap::Add)
.SetMethod("get", &IDWeakMap::Get)
.SetMethod("has", &IDWeakMap::Has)
.SetMethod("keys", &IDWeakMap::Keys)
.SetMethod("remove", &IDWeakMap::Remove);
}
} // namespace api
} // namespace atom
namespace {
void Initialize(v8::Local<v8::Object> exports, v8::Local<v8::Value> unused,
v8::Local<v8::Context> context, void* priv) {
using atom::api::IDWeakMap;
v8::Isolate* isolate = context->GetIsolate();
v8::Local<v8::Function> constructor = mate::CreateConstructor<IDWeakMap>(
isolate,
"IDWeakMap",
base::Bind(&mate::NewOperatorFactory<IDWeakMap>));
exports->Set(mate::StringToSymbol(isolate, "IDWeakMap"), constructor);
}
} // namespace
NODE_MODULE_CONTEXT_AWARE_BUILTIN(atom_common_id_weak_map, Initialize)

44
atom/common/api/atom_api_id_weak_map.h
View file

@ -1,44 +0,0 @@
// Copyright (c) 2013 GitHub, Inc.
// Copyright (c) 2012 Intel Corp. All rights reserved.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#ifndef ATOM_COMMON_API_ATOM_API_ID_WEAK_MAP_H_
#define ATOM_COMMON_API_ATOM_API_ID_WEAK_MAP_H_
#include <vector>
#include "atom/common/id_weak_map.h"
#include "native_mate/wrappable.h"
namespace atom {
namespace api {
// Like ES6's WeakMap, but the key is Integer and the value is Weak Pointer.
class IDWeakMap : public mate::Wrappable {
public:
IDWeakMap();
static void BuildPrototype(v8::Isolate* isolate,
v8::Local<v8::ObjectTemplate> prototype);
private:
virtual ~IDWeakMap();
int32_t Add(v8::Isolate* isolate, v8::Local<v8::Object> object);
v8::Local<v8::Value> Get(v8::Isolate* isolate, int32_t key);
bool Has(int32_t key) const;
std::vector<int32_t> Keys() const;
void Remove(int32_t key);
atom::IDWeakMap map_;
DISALLOW_COPY_AND_ASSIGN(IDWeakMap);
};
} // namespace api
} // namespace atom
#endif // ATOM_COMMON_API_ATOM_API_ID_WEAK_MAP_H_

6
atom/common/api/atom_api_v8_util.cc
View file

@ -28,6 +28,11 @@ void SetHiddenValue(v8::Local<v8::Object> object,
object->SetHiddenValue(key, value);
}
void DeleteHiddenValue(v8::Local<v8::Object> object,
v8::Local<v8::String> key) {
object->DeleteHiddenValue(key);
}
int32_t GetObjectHash(v8::Local<v8::Object> object) {
return object->GetIdentityHash();
}
@ -48,6 +53,7 @@ void Initialize(v8::Local<v8::Object> exports, v8::Local<v8::Value> unused,
dict.SetMethod("createObjectWithName", &CreateObjectWithName);
dict.SetMethod("getHiddenValue", &GetHiddenValue);
dict.SetMethod("setHiddenValue", &SetHiddenValue);
dict.SetMethod("deleteHiddenValue", &DeleteHiddenValue);
dict.SetMethod("getObjectHash", &GetObjectHash);
dict.SetMethod("setDestructor", &SetDestructor);
dict.SetMethod("takeHeapSnapshot", &TakeHeapSnapshot);

50
atom/common/api/object_life_monitor.cc
View file

@ -5,32 +5,52 @@
#include "atom/common/api/object_life_monitor.h"
#include "native_mate/compat.h"
#include "base/bind.h"
#include "base/message_loop/message_loop.h"
namespace atom {
// static
void ObjectLifeMonitor::BindTo(v8::Isolate* isolate,
v8::Local<v8::Object> target,
v8::Local<v8::Value> destructor) {
target->SetHiddenValue(MATE_STRING_NEW(isolate, "destructor"), destructor);
ObjectLifeMonitor* olm = new ObjectLifeMonitor();
olm->handle_.reset(isolate, target);
olm->handle_.SetWeak(olm, WeakCallback);
v8::Local<v8::Function> destructor) {
new ObjectLifeMonitor(isolate, target, destructor);
}
ObjectLifeMonitor::ObjectLifeMonitor() {
ObjectLifeMonitor::ObjectLifeMonitor(v8::Isolate* isolate,
v8::Local<v8::Object> target,
v8::Local<v8::Function> destructor)
: isolate_(isolate),
context_(isolate, isolate->GetCurrentContext()),
target_(isolate, target),
destructor_(isolate, destructor),
weak_ptr_factory_(this) {
target_.SetWeak(this, OnObjectGC, v8::WeakCallbackType::kParameter);
}
// static
void ObjectLifeMonitor::WeakCallback(
const v8::WeakCallbackData<v8::Object, ObjectLifeMonitor>& data) {
// destructor.call(object, object);
v8::Local<v8::Object> obj = data.GetValue();
v8::Local<v8::Function>::Cast(obj->GetHiddenValue(
MATE_STRING_NEW(data.GetIsolate(), "destructor")))->Call(obj, 0, NULL);
delete data.GetParameter();
void ObjectLifeMonitor::OnObjectGC(
const v8::WeakCallbackInfo<ObjectLifeMonitor>& data) {
// Usually FirstWeakCallback should do nothing other than reset |object_|
// and then set a second weak callback to run later. We can sidestep that,
// because posting a task to the current message loop is all but free - but
// DO NOT add any more work to this method. The only acceptable place to add
// code is RunCallback.
ObjectLifeMonitor* self = data.GetParameter();
self->target_.Reset();
base::MessageLoop::current()->PostTask(
FROM_HERE, base::Bind(&ObjectLifeMonitor::RunCallback,
self->weak_ptr_factory_.GetWeakPtr()));
}
void ObjectLifeMonitor::RunCallback() {
v8::HandleScope handle_scope(isolate_);
v8::Local<v8::Context> context = v8::Local<v8::Context>::New(
isolate_, context_);
v8::Context::Scope context_scope(context);
v8::Local<v8::Function>::New(isolate_, destructor_)->Call(
context->Global(), 0, nullptr);
delete this;
}
} // namespace atom

21
atom/common/api/object_life_monitor.h
View file

@ -6,7 +6,8 @@
#define ATOM_COMMON_API_OBJECT_LIFE_MONITOR_H_
#include "base/basictypes.h"
#include "native_mate/scoped_persistent.h"
#include "base/memory/weak_ptr.h"
#include "v8/include/v8.h"
namespace atom {
@ -14,15 +15,23 @@ class ObjectLifeMonitor {
public:
static void BindTo(v8::Isolate* isolate,
v8::Local<v8::Object> target,
v8::Local<v8::Value> destructor);
v8::Local<v8::Function> destructor);
private:
ObjectLifeMonitor();
ObjectLifeMonitor(v8::Isolate* isolate,
v8::Local<v8::Object> target,
v8::Local<v8::Function> destructor);
static void WeakCallback(
const v8::WeakCallbackData<v8::Object, ObjectLifeMonitor>& data);
static void OnObjectGC(const v8::WeakCallbackInfo<ObjectLifeMonitor>& data);
mate::ScopedPersistent<v8::Object> handle_;
void RunCallback();
v8::Isolate* isolate_;
v8::Global<v8::Context> context_;
v8::Global<v8::Object> target_;
v8::Global<v8::Function> destructor_;
base::WeakPtrFactory<ObjectLifeMonitor> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(ObjectLifeMonitor);
};

30
atom/common/id_weak_map.cc
View file

@ -10,6 +10,22 @@
namespace atom {
namespace {
struct ObjectKey {
ObjectKey(int id, IDWeakMap* map) : id(id), map(map) {}
int id;
IDWeakMap* map;
};
void OnObjectGC(const v8::WeakCallbackInfo<ObjectKey>& data) {
ObjectKey* key = data.GetParameter();
key->map->Remove(key->id);
delete key;
}
} // namespace
IDWeakMap::IDWeakMap() : next_id_(0) {
}
@ -18,11 +34,9 @@ IDWeakMap::~IDWeakMap() {
int32_t IDWeakMap::Add(v8::Isolate* isolate, v8::Local<v8::Object> object) {
int32_t id = GetNextID();
object->SetHiddenValue(mate::StringToSymbol(isolate, "IDWeakMapKey"),
mate::Converter<int32_t>::ToV8(isolate, id));
auto global = make_linked_ptr(new v8::Global<v8::Object>(isolate, object));
global->SetWeak(this, &WeakCallback);
ObjectKey* key = new ObjectKey(id, this);
global->SetWeak(key, OnObjectGC, v8::WeakCallbackType::kParameter);
map_[id] = global;
return id;
}
@ -71,12 +85,4 @@ int32_t IDWeakMap::GetNextID() {
return ++next_id_;
}
// static
void IDWeakMap::WeakCallback(
const v8::WeakCallbackData<v8::Object, IDWeakMap>& data) {
int32_t id = data.GetValue()->GetHiddenValue(
mate::StringToV8(data.GetIsolate(), "IDWeakMapKey"))->Int32Value();
data.GetParameter()->Remove(id);
}
} // namespace atom

3
atom/common/id_weak_map.h
View file

@ -44,9 +44,6 @@ class IDWeakMap {
// Returns next available ID.
int32_t GetNextID();
static void WeakCallback(
const v8::WeakCallbackData<v8::Object, IDWeakMap>& data);
// ID of next stored object.
int32_t next_id_;

12
atom/common/native_mate_converters/gfx_converter.cc
View file

@ -14,7 +14,8 @@ namespace mate {
v8::Local<v8::Value> Converter<gfx::Point>::ToV8(v8::Isolate* isolate,
const gfx::Point& val) {
mate::Dictionary dict(isolate, v8::Object::New(isolate));
mate::Dictionary dict = mate::Dictionary::CreateEmpty(isolate);
dict.SetHidden("simple", true);
dict.Set("x", val.x());
dict.Set("y", val.y());
return dict.GetHandle();
@ -35,7 +36,8 @@ bool Converter<gfx::Point>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> Converter<gfx::Size>::ToV8(v8::Isolate* isolate,
const gfx::Size& val) {
mate::Dictionary dict(isolate, v8::Object::New(isolate));
mate::Dictionary dict = mate::Dictionary::CreateEmpty(isolate);
dict.SetHidden("simple", true);
dict.Set("width", val.width());
dict.Set("height", val.height());
return dict.GetHandle();
@ -56,7 +58,8 @@ bool Converter<gfx::Size>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> Converter<gfx::Rect>::ToV8(v8::Isolate* isolate,
const gfx::Rect& val) {
mate::Dictionary dict(isolate, v8::Object::New(isolate));
mate::Dictionary dict = mate::Dictionary::CreateEmpty(isolate);
dict.SetHidden("simple", true);
dict.Set("x", val.x());
dict.Set("y", val.y());
dict.Set("width", val.width());
@ -95,7 +98,8 @@ struct Converter<gfx::Display::TouchSupport> {
v8::Local<v8::Value> Converter<gfx::Display>::ToV8(v8::Isolate* isolate,
const gfx::Display& val) {
mate::Dictionary dict(isolate, v8::Object::New(isolate));
mate::Dictionary dict = mate::Dictionary::CreateEmpty(isolate);
dict.SetHidden("simple", true);
dict.Set("id", val.id());
dict.Set("bounds", val.bounds());
dict.Set("workArea", val.work_area());

11
atom/common/native_mate_converters/v8_value_converter.cc
View file

@ -11,6 +11,7 @@
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/values.h"
#include "native_mate/dictionary.h"
#include "vendor/node/src/node_buffer.h"
namespace atom {
@ -179,7 +180,8 @@ v8::Local<v8::Value> V8ValueConverter::ToV8Array(
v8::Local<v8::Value> V8ValueConverter::ToV8Object(
v8::Isolate* isolate, const base::DictionaryValue* val) const {
v8::Local<v8::Object> result(v8::Object::New(isolate));
mate::Dictionary result = mate::Dictionary::CreateEmpty(isolate);
result.SetHidden("simple", true);
for (base::DictionaryValue::Iterator iter(*val);
!iter.IsAtEnd(); iter.Advance()) {
@ -188,17 +190,14 @@ v8::Local<v8::Value> V8ValueConverter::ToV8Object(
CHECK(!child_v8.IsEmpty());
v8::TryCatch try_catch;
result->Set(
v8::String::NewFromUtf8(isolate, key.c_str(), v8::String::kNormalString,
key.length()),
child_v8);
result.Set(key, child_v8);
if (try_catch.HasCaught()) {
LOG(ERROR) << "Setter for property " << key.c_str() << " threw an "
<< "exception.";
}
}
return result;
return result.GetHandle();
}
base::Value* V8ValueConverter::FromV8ValueImpl(

1
atom/common/node_bindings.cc
View file

@ -47,7 +47,6 @@ REFERENCE_MODULE(atom_browser_window);
REFERENCE_MODULE(atom_common_asar);
REFERENCE_MODULE(atom_common_clipboard);
REFERENCE_MODULE(atom_common_crash_reporter);
REFERENCE_MODULE(atom_common_id_weak_map);
REFERENCE_MODULE(atom_common_native_image);
REFERENCE_MODULE(atom_common_screen);
REFERENCE_MODULE(atom_common_shell);

2
atom/renderer/api/lib/remote.coffee
View file

@ -102,7 +102,7 @@ metaToValue = (meta) ->
# Track delegate object's life time, and tell the browser to clean up
# when the object is GCed.
v8Util.setDestructor ret, ->
ipc.send 'ATOM_BROWSER_DEREFERENCE', meta.storeId
ipc.send 'ATOM_BROWSER_DEREFERENCE', meta.id
# Remember object's id.
v8Util.setHiddenValue ret, 'atomId', meta.id

2
filenames.gypi
View file

@ -235,8 +235,6 @@
'atom/common/api/atom_api_asar.cc',
'atom/common/api/atom_api_clipboard.cc',
'atom/common/api/atom_api_crash_reporter.cc',
'atom/common/api/atom_api_id_weak_map.cc',
'atom/common/api/atom_api_id_weak_map.h',
'atom/common/api/atom_api_native_image.cc',
'atom/common/api/atom_api_native_image.h',
'atom/common/api/atom_api_native_image_mac.mm',

2
spec/chromium-spec.coffee
View file

@ -8,7 +8,7 @@ remote = require 'remote'
describe 'chromium feature', ->
fixtures = path.resolve __dirname, 'fixtures'
describe 'heap snapshot', ->
xdescribe 'heap snapshot', ->
it 'does not crash', ->
process.atomBinding('v8_util').takeHeapSnapshot()

2
vendor/native_mate vendored

@ -1 +1 @@
Subproject commit b41635e80921bddbf1a36f030490e063cd593477
Subproject commit 8ca005eb41591f583ebab804945311903f866ad6