forked from mirrors/gecko-dev
501 lines
12 KiB
C++
501 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* vim: set ts=4 sw=4 et tw=80:
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "JavaScriptShared.h"
|
|
#include "mozilla/dom/BindingUtils.h"
|
|
#include "jsfriendapi.h"
|
|
#include "xpcprivate.h"
|
|
|
|
using namespace js;
|
|
using namespace JS;
|
|
using namespace mozilla;
|
|
using namespace mozilla::jsipc;
|
|
|
|
ObjectStore::ObjectStore()
|
|
: table_(SystemAllocPolicy())
|
|
{
|
|
}
|
|
|
|
bool
|
|
ObjectStore::init()
|
|
{
|
|
return table_.init(32);
|
|
}
|
|
|
|
void
|
|
ObjectStore::trace(JSTracer *trc)
|
|
{
|
|
for (ObjectTable::Range r(table_.all()); !r.empty(); r.popFront()) {
|
|
DebugOnly<JSObject *> prior = r.front().value().get();
|
|
JS_CallHeapObjectTracer(trc, &r.front().value(), "ipc-object");
|
|
MOZ_ASSERT(r.front().value() == prior);
|
|
}
|
|
}
|
|
|
|
JSObject *
|
|
ObjectStore::find(ObjectId id)
|
|
{
|
|
ObjectTable::Ptr p = table_.lookup(id);
|
|
if (!p)
|
|
return nullptr;
|
|
return p->value();
|
|
}
|
|
|
|
bool
|
|
ObjectStore::add(ObjectId id, JSObject *obj)
|
|
{
|
|
return table_.put(id, obj);
|
|
}
|
|
|
|
void
|
|
ObjectStore::remove(ObjectId id)
|
|
{
|
|
table_.remove(id);
|
|
}
|
|
|
|
ObjectIdCache::ObjectIdCache()
|
|
: table_(nullptr)
|
|
{
|
|
}
|
|
|
|
ObjectIdCache::~ObjectIdCache()
|
|
{
|
|
if (table_) {
|
|
dom::AddForDeferredFinalization<ObjectIdTable, nsAutoPtr>(table_);
|
|
table_ = nullptr;
|
|
}
|
|
}
|
|
|
|
bool
|
|
ObjectIdCache::init()
|
|
{
|
|
MOZ_ASSERT(!table_);
|
|
table_ = new ObjectIdTable(SystemAllocPolicy());
|
|
return table_ && table_->init(32);
|
|
}
|
|
|
|
void
|
|
ObjectIdCache::trace(JSTracer *trc)
|
|
{
|
|
for (ObjectIdTable::Range r(table_->all()); !r.empty(); r.popFront()) {
|
|
JSObject *obj = r.front().key();
|
|
JS_CallObjectTracer(trc, &obj, "ipc-id");
|
|
MOZ_ASSERT(obj == r.front().key());
|
|
}
|
|
}
|
|
|
|
ObjectId
|
|
ObjectIdCache::find(JSObject *obj)
|
|
{
|
|
ObjectIdTable::Ptr p = table_->lookup(obj);
|
|
if (!p)
|
|
return 0;
|
|
return p->value();
|
|
}
|
|
|
|
bool
|
|
ObjectIdCache::add(JSContext *cx, JSObject *obj, ObjectId id)
|
|
{
|
|
if (!table_->put(obj, id))
|
|
return false;
|
|
JS_StoreObjectPostBarrierCallback(cx, keyMarkCallback, obj, table_);
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* This function is called during minor GCs for each key in the HashMap that has
|
|
* been moved.
|
|
*/
|
|
/* static */ void
|
|
ObjectIdCache::keyMarkCallback(JSTracer *trc, JSObject *key, void *data) {
|
|
ObjectIdTable* table = static_cast<ObjectIdTable*>(data);
|
|
JSObject *prior = key;
|
|
JS_CallObjectTracer(trc, &key, "ObjectIdCache::table_ key");
|
|
table->rekeyIfMoved(prior, key);
|
|
}
|
|
|
|
void
|
|
ObjectIdCache::remove(JSObject *obj)
|
|
{
|
|
table_->remove(obj);
|
|
}
|
|
|
|
bool
|
|
JavaScriptShared::init()
|
|
{
|
|
if (!objects_.init())
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
JavaScriptShared::convertIdToGeckoString(JSContext *cx, JS::HandleId id, nsString *to)
|
|
{
|
|
RootedValue idval(cx);
|
|
if (!JS_IdToValue(cx, id, &idval))
|
|
return false;
|
|
|
|
RootedString str(cx, ToString(cx, idval));
|
|
if (!str)
|
|
return false;
|
|
|
|
const jschar *chars = JS_GetStringCharsZ(cx, str);
|
|
if (!chars)
|
|
return false;
|
|
|
|
*to = chars;
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
JavaScriptShared::convertGeckoStringToId(JSContext *cx, const nsString &from, JS::MutableHandleId to)
|
|
{
|
|
RootedString str(cx, JS_NewUCStringCopyN(cx, from.BeginReading(), from.Length()));
|
|
if (!str)
|
|
return false;
|
|
|
|
return JS_StringToId(cx, str, to);
|
|
}
|
|
|
|
bool
|
|
JavaScriptShared::toVariant(JSContext *cx, JS::HandleValue from, JSVariant *to)
|
|
{
|
|
switch (JS_TypeOfValue(cx, from)) {
|
|
case JSTYPE_VOID:
|
|
*to = void_t();
|
|
return true;
|
|
|
|
case JSTYPE_NULL:
|
|
{
|
|
*to = uint64_t(0);
|
|
return true;
|
|
}
|
|
|
|
case JSTYPE_OBJECT:
|
|
case JSTYPE_FUNCTION:
|
|
{
|
|
RootedObject obj(cx, from.toObjectOrNull());
|
|
if (!obj) {
|
|
MOZ_ASSERT(from == JSVAL_NULL);
|
|
*to = uint64_t(0);
|
|
return true;
|
|
}
|
|
|
|
if (xpc_JSObjectIsID(cx, obj)) {
|
|
JSIID iid;
|
|
const nsID *id = xpc_JSObjectToID(cx, obj);
|
|
ConvertID(*id, &iid);
|
|
*to = iid;
|
|
return true;
|
|
}
|
|
|
|
ObjectId id;
|
|
if (!makeId(cx, obj, &id))
|
|
return false;
|
|
*to = uint64_t(id);
|
|
return true;
|
|
}
|
|
|
|
case JSTYPE_STRING:
|
|
{
|
|
nsDependentJSString dep;
|
|
if (!dep.init(cx, from))
|
|
return false;
|
|
*to = dep;
|
|
return true;
|
|
}
|
|
|
|
case JSTYPE_NUMBER:
|
|
if (JSVAL_IS_INT(from))
|
|
*to = double(from.toInt32());
|
|
else
|
|
*to = from.toDouble();
|
|
return true;
|
|
|
|
case JSTYPE_BOOLEAN:
|
|
*to = from.toBoolean();
|
|
return true;
|
|
|
|
default:
|
|
MOZ_ASSERT(false);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool
|
|
JavaScriptShared::toValue(JSContext *cx, const JSVariant &from, MutableHandleValue to)
|
|
{
|
|
switch (from.type()) {
|
|
case JSVariant::Tvoid_t:
|
|
to.set(UndefinedValue());
|
|
return true;
|
|
|
|
case JSVariant::Tuint64_t:
|
|
{
|
|
ObjectId id = from.get_uint64_t();
|
|
if (id) {
|
|
JSObject *obj = unwrap(cx, id);
|
|
if (!obj)
|
|
return false;
|
|
to.set(ObjectValue(*obj));
|
|
} else {
|
|
to.set(JSVAL_NULL);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
case JSVariant::Tdouble:
|
|
to.set(JS_NumberValue(from.get_double()));
|
|
return true;
|
|
|
|
case JSVariant::Tbool:
|
|
to.set(BOOLEAN_TO_JSVAL(from.get_bool()));
|
|
return true;
|
|
|
|
case JSVariant::TnsString:
|
|
{
|
|
const nsString &old = from.get_nsString();
|
|
JSString *str = JS_NewUCStringCopyN(cx, old.BeginReading(), old.Length());
|
|
if (!str)
|
|
return false;
|
|
to.set(StringValue(str));
|
|
return true;
|
|
}
|
|
|
|
case JSVariant::TJSIID:
|
|
{
|
|
nsID iid;
|
|
const JSIID &id = from.get_JSIID();
|
|
ConvertID(id, &iid);
|
|
|
|
JSCompartment *compartment = GetContextCompartment(cx);
|
|
RootedObject global(cx, JS_GetGlobalForCompartmentOrNull(cx, compartment));
|
|
JSObject *obj = xpc_NewIDObject(cx, global, iid);
|
|
if (!obj)
|
|
return false;
|
|
to.set(ObjectValue(*obj));
|
|
return true;
|
|
}
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/* static */ void
|
|
JavaScriptShared::ConvertID(const nsID &from, JSIID *to)
|
|
{
|
|
to->m0() = from.m0;
|
|
to->m1() = from.m1;
|
|
to->m2() = from.m2;
|
|
to->m3_0() = from.m3[0];
|
|
to->m3_1() = from.m3[1];
|
|
to->m3_2() = from.m3[2];
|
|
to->m3_3() = from.m3[3];
|
|
to->m3_4() = from.m3[4];
|
|
to->m3_5() = from.m3[5];
|
|
to->m3_6() = from.m3[6];
|
|
to->m3_7() = from.m3[7];
|
|
}
|
|
|
|
/* static */ void
|
|
JavaScriptShared::ConvertID(const JSIID &from, nsID *to)
|
|
{
|
|
to->m0 = from.m0();
|
|
to->m1 = from.m1();
|
|
to->m2 = from.m2();
|
|
to->m3[0] = from.m3_0();
|
|
to->m3[1] = from.m3_1();
|
|
to->m3[2] = from.m3_2();
|
|
to->m3[3] = from.m3_3();
|
|
to->m3[4] = from.m3_4();
|
|
to->m3[5] = from.m3_5();
|
|
to->m3[6] = from.m3_6();
|
|
to->m3[7] = from.m3_7();
|
|
}
|
|
|
|
static const uint32_t DefaultPropertyOp = 1;
|
|
static const uint32_t GetterOnlyPropertyStub = 2;
|
|
static const uint32_t UnknownPropertyOp = 3;
|
|
|
|
bool
|
|
JavaScriptShared::fromDescriptor(JSContext *cx, Handle<JSPropertyDescriptor> desc,
|
|
PPropertyDescriptor *out)
|
|
{
|
|
out->attrs() = desc.attributes();
|
|
if (!toVariant(cx, desc.value(), &out->value()))
|
|
return false;
|
|
|
|
if (!makeId(cx, desc.object(), &out->objId()))
|
|
return false;
|
|
|
|
if (!desc.getter()) {
|
|
out->getter() = 0;
|
|
} else if (desc.hasGetterObject()) {
|
|
JSObject *getter = desc.getterObject();
|
|
if (!makeId(cx, getter, &out->getter()))
|
|
return false;
|
|
} else {
|
|
if (desc.getter() == JS_PropertyStub)
|
|
out->getter() = DefaultPropertyOp;
|
|
else
|
|
out->getter() = UnknownPropertyOp;
|
|
}
|
|
|
|
if (!desc.setter()) {
|
|
out->setter() = 0;
|
|
} else if (desc.hasSetterObject()) {
|
|
JSObject *setter = desc.setterObject();
|
|
if (!makeId(cx, setter, &out->setter()))
|
|
return false;
|
|
} else {
|
|
if (desc.setter() == JS_StrictPropertyStub)
|
|
out->setter() = DefaultPropertyOp;
|
|
else if (desc.setter() == js_GetterOnlyPropertyStub)
|
|
out->setter() = GetterOnlyPropertyStub;
|
|
else
|
|
out->setter() = UnknownPropertyOp;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
UnknownPropertyStub(JSContext *cx, HandleObject obj, HandleId id, MutableHandleValue vp)
|
|
{
|
|
JS_ReportError(cx, "getter could not be wrapped via CPOWs");
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
UnknownStrictPropertyStub(JSContext *cx, HandleObject obj, HandleId id, bool strict, MutableHandleValue vp)
|
|
{
|
|
JS_ReportError(cx, "setter could not be wrapped via CPOWs");
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
JavaScriptShared::toDescriptor(JSContext *cx, const PPropertyDescriptor &in,
|
|
MutableHandle<JSPropertyDescriptor> out)
|
|
{
|
|
out.setAttributes(in.attrs());
|
|
if (!toValue(cx, in.value(), out.value()))
|
|
return false;
|
|
Rooted<JSObject*> obj(cx);
|
|
if (!unwrap(cx, in.objId(), &obj))
|
|
return false;
|
|
out.object().set(obj);
|
|
|
|
if (!in.getter()) {
|
|
out.setGetter(nullptr);
|
|
} else if (in.attrs() & JSPROP_GETTER) {
|
|
Rooted<JSObject*> getter(cx);
|
|
if (!unwrap(cx, in.getter(), &getter))
|
|
return false;
|
|
out.setGetter(JS_DATA_TO_FUNC_PTR(JSPropertyOp, getter.get()));
|
|
} else {
|
|
if (in.getter() == DefaultPropertyOp)
|
|
out.setGetter(JS_PropertyStub);
|
|
else
|
|
out.setGetter(UnknownPropertyStub);
|
|
}
|
|
|
|
if (!in.setter()) {
|
|
out.setSetter(nullptr);
|
|
} else if (in.attrs() & JSPROP_SETTER) {
|
|
Rooted<JSObject*> setter(cx);
|
|
if (!unwrap(cx, in.setter(), &setter))
|
|
return false;
|
|
out.setSetter(JS_DATA_TO_FUNC_PTR(JSStrictPropertyOp, setter.get()));
|
|
} else {
|
|
if (in.setter() == DefaultPropertyOp)
|
|
out.setSetter(JS_StrictPropertyStub);
|
|
else if (in.setter() == GetterOnlyPropertyStub)
|
|
out.setSetter(js_GetterOnlyPropertyStub);
|
|
else
|
|
out.setSetter(UnknownStrictPropertyStub);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
CpowIdHolder::ToObject(JSContext *cx, JS::MutableHandleObject objp)
|
|
{
|
|
return js_->Unwrap(cx, cpows_, objp);
|
|
}
|
|
|
|
bool
|
|
JavaScriptShared::Unwrap(JSContext *cx, const InfallibleTArray<CpowEntry> &aCpows,
|
|
JS::MutableHandleObject objp)
|
|
{
|
|
objp.set(nullptr);
|
|
|
|
if (!aCpows.Length())
|
|
return true;
|
|
|
|
RootedObject obj(cx, JS_NewObject(cx, nullptr, JS::NullPtr(), JS::NullPtr()));
|
|
if (!obj)
|
|
return false;
|
|
|
|
RootedValue v(cx);
|
|
RootedString str(cx);
|
|
for (size_t i = 0; i < aCpows.Length(); i++) {
|
|
const nsString &name = aCpows[i].name();
|
|
|
|
if (!toValue(cx, aCpows[i].value(), &v))
|
|
return false;
|
|
|
|
if (!JS_DefineUCProperty(cx,
|
|
obj,
|
|
name.BeginReading(),
|
|
name.Length(),
|
|
v,
|
|
nullptr,
|
|
nullptr,
|
|
JSPROP_ENUMERATE))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
objp.set(obj);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
JavaScriptShared::Wrap(JSContext *cx, HandleObject aObj, InfallibleTArray<CpowEntry> *outCpows)
|
|
{
|
|
if (!aObj)
|
|
return true;
|
|
|
|
AutoIdArray ids(cx, JS_Enumerate(cx, aObj));
|
|
if (!ids)
|
|
return false;
|
|
|
|
RootedId id(cx);
|
|
RootedValue v(cx);
|
|
for (size_t i = 0; i < ids.length(); i++) {
|
|
id = ids[i];
|
|
|
|
nsString str;
|
|
if (!convertIdToGeckoString(cx, id, &str))
|
|
return false;
|
|
|
|
if (!JS_GetPropertyById(cx, aObj, id, &v))
|
|
return false;
|
|
|
|
JSVariant var;
|
|
if (!toVariant(cx, v, &var))
|
|
return false;
|
|
|
|
outCpows->AppendElement(CpowEntry(str, var));
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|